From 1b6d66745ac1768adb387c2227cdcf4452271149 Mon Sep 17 00:00:00 2001 From: Diego Biurrun Date: Tue, 26 Mar 2013 19:50:40 +0100 Subject: Split MPEG-1/2 decoder code off from MPEG-1/2 common code --- libavcodec/Makefile | 8 +- libavcodec/mpeg12.c | 2536 ++---------------------------------------------- libavcodec/mpeg12.h | 11 + libavcodec/mpeg12dec.c | 2461 ++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 2535 insertions(+), 2481 deletions(-) create mode 100644 libavcodec/mpeg12dec.c (limited to 'libavcodec') diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 32a3a7b28a..86f1c4ba80 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -157,8 +157,8 @@ OBJS-$(CONFIG_EAMAD_DECODER) += eamad.o eaidct.o mpeg12.o \ mpeg12data.o OBJS-$(CONFIG_EATGQ_DECODER) += eatgq.o eaidct.o OBJS-$(CONFIG_EATGV_DECODER) += eatgv.o -OBJS-$(CONFIG_EATQI_DECODER) += eatqi.o eaidct.o mpeg12.o \ - mpeg12data.o +OBJS-$(CONFIG_EATQI_DECODER) += eatqi.o eaidct.o mpeg12dec.o \ + mpeg12.o mpeg12data.o OBJS-$(CONFIG_EIGHTBPS_DECODER) += 8bps.o OBJS-$(CONFIG_EIGHTSVX_EXP_DECODER) += 8svx.o OBJS-$(CONFIG_EIGHTSVX_FIB_DECODER) += 8svx.o @@ -240,9 +240,9 @@ OBJS-$(CONFIG_MP3ON4FLOAT_DECODER) += mpegaudiodec_float.o mpeg4audio.o OBJS-$(CONFIG_MPC7_DECODER) += mpc7.o mpc.o OBJS-$(CONFIG_MPC8_DECODER) += mpc8.o mpc.o OBJS-$(CONFIG_MPEG_XVMC_DECODER) += mpegvideo_xvmc.o -OBJS-$(CONFIG_MPEG1VIDEO_DECODER) += mpeg12.o mpeg12data.o +OBJS-$(CONFIG_MPEG1VIDEO_DECODER) += mpeg12dec.o mpeg12.o mpeg12data.o OBJS-$(CONFIG_MPEG1VIDEO_ENCODER) += mpeg12enc.o mpeg12.o -OBJS-$(CONFIG_MPEG2VIDEO_DECODER) += mpeg12.o mpeg12data.o +OBJS-$(CONFIG_MPEG2VIDEO_DECODER) += mpeg12dec.o mpeg12.o mpeg12data.o OBJS-$(CONFIG_MPEG2VIDEO_ENCODER) += mpeg12enc.o mpeg12.o OBJS-$(CONFIG_MSMPEG4V1_DECODER) += msmpeg4.o msmpeg4data.o OBJS-$(CONFIG_MSMPEG4V2_DECODER) += msmpeg4.o msmpeg4data.o h263dec.o \ diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c index 0634de111d..aa0b4d542f 100644 --- a/libavcodec/mpeg12.c +++ b/libavcodec/mpeg12.c @@ -42,554 +42,6 @@ //#undef NDEBUG //#include - -#define MV_VLC_BITS 9 -#define MBINCR_VLC_BITS 9 -#define MB_PAT_VLC_BITS 9 -#define MB_PTYPE_VLC_BITS 6 -#define MB_BTYPE_VLC_BITS 6 - -static VLC mv_vlc; - -/* as H.263, but only 17 codes */ -static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred) -{ - int code, sign, val, shift; - - code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2); - if (code == 0) { - return pred; - } - if (code < 0) { - return 0xffff; - } - - sign = get_bits1(&s->gb); - shift = fcode - 1; - val = code; - if (shift) { - val = (val - 1) << shift; - val |= get_bits(&s->gb, shift); - val++; - } - if (sign) - val = -val; - val += pred; - - /* modulo decoding */ - return sign_extend(val, 5 + shift); -} - -static inline int mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n) -{ - int level, dc, diff, i, j, run; - int component; - RLTable *rl = &ff_rl_mpeg1; - uint8_t * const scantable = s->intra_scantable.permutated; - const uint16_t *quant_matrix = s->intra_matrix; - const int qscale = s->qscale; - - /* DC coefficient */ - component = (n <= 3 ? 0 : n - 4 + 1); - diff = decode_dc(&s->gb, component); - if (diff >= 0xffff) - return -1; - dc = s->last_dc[component]; - dc += diff; - s->last_dc[component] = dc; - block[0] = dc * quant_matrix[0]; - av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff); - i = 0; - { - OPEN_READER(re, &s->gb); - /* now quantify & encode AC coefficients */ - for (;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if (level == 127) { - break; - } else if (level != 0) { - i += run; - j = scantable[i]; - level = (level * qscale * quant_matrix[j]) >> 4; - level = (level - 1) | 1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); - if (level == -128) { - level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8); - } else if (level == 0) { - level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8); - } - i += run; - j = scantable[i]; - if (level < 0) { - level = -level; - level = (level * qscale * quant_matrix[j]) >> 4; - level = (level - 1) | 1; - level = -level; - } else { - level = (level * qscale * quant_matrix[j]) >> 4; - level = (level - 1) | 1; - } - } - if (i > 63) { - av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - block[j] = level; - } - CLOSE_READER(re, &s->gb); - } - s->block_last_index[n] = i; - return 0; -} - -int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n) -{ - return mpeg1_decode_block_intra(s, block, n); -} - -static inline int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n) -{ - int level, i, j, run; - RLTable *rl = &ff_rl_mpeg1; - uint8_t * const scantable = s->intra_scantable.permutated; - const uint16_t *quant_matrix = s->inter_matrix; - const int qscale = s->qscale; - - { - OPEN_READER(re, &s->gb); - i = -1; - // special case for first coefficient, no need to add second VLC table - UPDATE_CACHE(re, &s->gb); - if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { - level = (3 * qscale * quant_matrix[0]) >> 5; - level = (level - 1) | 1; - if (GET_CACHE(re, &s->gb) & 0x40000000) - level = -level; - block[0] = level; - i++; - SKIP_BITS(re, &s->gb, 2); - if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - goto end; - } - /* now quantify & encode AC coefficients */ - for (;;) { - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if (level != 0) { - i += run; - j = scantable[i]; - level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; - level = (level - 1) | 1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); - if (level == -128) { - level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8); - } else if (level == 0) { - level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8); - } - i += run; - j = scantable[i]; - if (level < 0) { - level = -level; - level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; - level = (level - 1) | 1; - level = -level; - } else { - level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; - level = (level - 1) | 1; - } - } - if (i > 63) { - av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - block[j] = level; - if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - break; - UPDATE_CACHE(re, &s->gb); - } -end: - LAST_SKIP_BITS(re, &s->gb, 2); - CLOSE_READER(re, &s->gb); - } - s->block_last_index[n] = i; - return 0; -} - -static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n) -{ - int level, i, j, run; - RLTable *rl = &ff_rl_mpeg1; - uint8_t * const scantable = s->intra_scantable.permutated; - const int qscale = s->qscale; - - { - OPEN_READER(re, &s->gb); - i = -1; - // special case for first coefficient, no need to add second VLC table - UPDATE_CACHE(re, &s->gb); - if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { - level = (3 * qscale) >> 1; - level = (level - 1) | 1; - if (GET_CACHE(re, &s->gb) & 0x40000000) - level = -level; - block[0] = level; - i++; - SKIP_BITS(re, &s->gb, 2); - if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - goto end; - } - - /* now quantify & encode AC coefficients */ - for (;;) { - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if (level != 0) { - i += run; - j = scantable[i]; - level = ((level * 2 + 1) * qscale) >> 1; - level = (level - 1) | 1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); - if (level == -128) { - level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8); - } else if (level == 0) { - level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8); - } - i += run; - j = scantable[i]; - if (level < 0) { - level = -level; - level = ((level * 2 + 1) * qscale) >> 1; - level = (level - 1) | 1; - level = -level; - } else { - level = ((level * 2 + 1) * qscale) >> 1; - level = (level - 1) | 1; - } - } - - block[j] = level; - if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - break; - UPDATE_CACHE(re, &s->gb); - } -end: - LAST_SKIP_BITS(re, &s->gb, 2); - CLOSE_READER(re, &s->gb); - } - s->block_last_index[n] = i; - return 0; -} - - -static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n) -{ - int level, i, j, run; - RLTable *rl = &ff_rl_mpeg1; - uint8_t * const scantable = s->intra_scantable.permutated; - const uint16_t *quant_matrix; - const int qscale = s->qscale; - int mismatch; - - mismatch = 1; - - { - OPEN_READER(re, &s->gb); - i = -1; - if (n < 4) - quant_matrix = s->inter_matrix; - else - quant_matrix = s->chroma_inter_matrix; - - // special case for first coefficient, no need to add second VLC table - UPDATE_CACHE(re, &s->gb); - if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { - level= (3 * qscale * quant_matrix[0]) >> 5; - if (GET_CACHE(re, &s->gb) & 0x40000000) - level = -level; - block[0] = level; - mismatch ^= level; - i++; - SKIP_BITS(re, &s->gb, 2); - if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - goto end; - } - - /* now quantify & encode AC coefficients */ - for (;;) { - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if (level != 0) { - i += run; - j = scantable[i]; - level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - - i += run; - j = scantable[i]; - if (level < 0) { - level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5; - level = -level; - } else { - level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; - } - } - if (i > 63) { - av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - mismatch ^= level; - block[j] = level; - if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - break; - UPDATE_CACHE(re, &s->gb); - } -end: - LAST_SKIP_BITS(re, &s->gb, 2); - CLOSE_READER(re, &s->gb); - } - block[63] ^= (mismatch & 1); - - s->block_last_index[n] = i; - return 0; -} - -static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, - int16_t *block, int n) -{ - int level, i, j, run; - RLTable *rl = &ff_rl_mpeg1; - uint8_t * const scantable = s->intra_scantable.permutated; - const int qscale = s->qscale; - OPEN_READER(re, &s->gb); - i = -1; - - // special case for first coefficient, no need to add second VLC table - UPDATE_CACHE(re, &s->gb); - if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { - level = (3 * qscale) >> 1; - if (GET_CACHE(re, &s->gb) & 0x40000000) - level = -level; - block[0] = level; - i++; - SKIP_BITS(re, &s->gb, 2); - if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - goto end; - } - - /* now quantify & encode AC coefficients */ - for (;;) { - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if (level != 0) { - i += run; - j = scantable[i]; - level = ((level * 2 + 1) * qscale) >> 1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - - i += run; - j = scantable[i]; - if (level < 0) { - level = ((-level * 2 + 1) * qscale) >> 1; - level = -level; - } else { - level = ((level * 2 + 1) * qscale) >> 1; - } - } - - block[j] = level; - if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - break; - UPDATE_CACHE(re, &s->gb); - } -end: - LAST_SKIP_BITS(re, &s->gb, 2); - CLOSE_READER(re, &s->gb); - s->block_last_index[n] = i; - return 0; -} - - -static inline int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n) -{ - int level, dc, diff, i, j, run; - int component; - RLTable *rl; - uint8_t * const scantable = s->intra_scantable.permutated; - const uint16_t *quant_matrix; - const int qscale = s->qscale; - int mismatch; - - /* DC coefficient */ - if (n < 4) { - quant_matrix = s->intra_matrix; - component = 0; - } else { - quant_matrix = s->chroma_intra_matrix; - component = (n & 1) + 1; - } - diff = decode_dc(&s->gb, component); - if (diff >= 0xffff) - return -1; - dc = s->last_dc[component]; - dc += diff; - s->last_dc[component] = dc; - block[0] = dc << (3 - s->intra_dc_precision); - av_dlog(s->avctx, "dc=%d\n", block[0]); - mismatch = block[0] ^ 1; - i = 0; - if (s->intra_vlc_format) - rl = &ff_rl_mpeg2; - else - rl = &ff_rl_mpeg1; - - { - OPEN_READER(re, &s->gb); - /* now quantify & encode AC coefficients */ - for (;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if (level == 127) { - break; - } else if (level != 0) { - i += run; - j = scantable[i]; - level = (level * qscale * quant_matrix[j]) >> 4; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - i += run; - j = scantable[i]; - if (level < 0) { - level = (-level * qscale * quant_matrix[j]) >> 4; - level = -level; - } else { - level = (level * qscale * quant_matrix[j]) >> 4; - } - } - if (i > 63) { - av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - mismatch ^= level; - block[j] = level; - } - CLOSE_READER(re, &s->gb); - } - block[63] ^= mismatch & 1; - - s->block_last_index[n] = i; - return 0; -} - -static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n) -{ - int level, dc, diff, j, run; - int component; - RLTable *rl; - uint8_t * scantable = s->intra_scantable.permutated; - const uint16_t *quant_matrix; - const int qscale = s->qscale; - - /* DC coefficient */ - if (n < 4) { - quant_matrix = s->intra_matrix; - component = 0; - } else { - quant_matrix = s->chroma_intra_matrix; - component = (n & 1) + 1; - } - diff = decode_dc(&s->gb, component); - if (diff >= 0xffff) - return -1; - dc = s->last_dc[component]; - dc += diff; - s->last_dc[component] = dc; - block[0] = dc << (3 - s->intra_dc_precision); - if (s->intra_vlc_format) - rl = &ff_rl_mpeg2; - else - rl = &ff_rl_mpeg1; - - { - OPEN_READER(re, &s->gb); - /* now quantify & encode AC coefficients */ - for (;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if (level == 127) { - break; - } else if (level != 0) { - scantable += run; - j = *scantable; - level = (level * qscale * quant_matrix[j]) >> 4; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - scantable += run; - j = *scantable; - if (level < 0) { - level = (-level * qscale * quant_matrix[j]) >> 4; - level = -level; - } else { - level = (level * qscale * quant_matrix[j]) >> 4; - } - } - - block[j] = level; - } - CLOSE_READER(re, &s->gb); - } - - s->block_last_index[n] = scantable - s->intra_scantable.permutated; - return 0; -} - uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; #define INIT_2D_VLC_RL(rl, static_size)\ @@ -656,13 +108,15 @@ void ff_mpeg1_clean_buffers(MpegEncContext *s) /******************************************/ /* decoding */ +VLC ff_mv_vlc; + VLC ff_dc_lum_vlc; VLC ff_dc_chroma_vlc; -static VLC mbincr_vlc; -static VLC mb_ptype_vlc; -static VLC mb_btype_vlc; -static VLC mb_pat_vlc; +VLC ff_mbincr_vlc; +VLC ff_mb_ptype_vlc; +VLC ff_mb_btype_vlc; +VLC ff_mb_pat_vlc; av_cold void ff_mpeg12_init_vlcs(void) { @@ -677,20 +131,20 @@ av_cold void ff_mpeg12_init_vlcs(void) INIT_VLC_STATIC(&ff_dc_chroma_vlc, DC_VLC_BITS, 12, ff_mpeg12_vlc_dc_chroma_bits, 1, 1, ff_mpeg12_vlc_dc_chroma_code, 2, 2, 514); - INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 17, + INIT_VLC_STATIC(&ff_mv_vlc, MV_VLC_BITS, 17, &ff_mpeg12_mbMotionVectorTable[0][1], 2, 1, &ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 518); - INIT_VLC_STATIC(&mbincr_vlc, MBINCR_VLC_BITS, 36, + INIT_VLC_STATIC(&ff_mbincr_vlc, MBINCR_VLC_BITS, 36, &ff_mpeg12_mbAddrIncrTable[0][1], 2, 1, &ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 538); - INIT_VLC_STATIC(&mb_pat_vlc, MB_PAT_VLC_BITS, 64, + INIT_VLC_STATIC(&ff_mb_pat_vlc, MB_PAT_VLC_BITS, 64, &ff_mpeg12_mbPatTable[0][1], 2, 1, &ff_mpeg12_mbPatTable[0][0], 2, 1, 512); - INIT_VLC_STATIC(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7, + INIT_VLC_STATIC(&ff_mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7, &table_mb_ptype[0][1], 2, 1, &table_mb_ptype[0][0], 2, 1, 64); - INIT_VLC_STATIC(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11, + INIT_VLC_STATIC(&ff_mb_btype_vlc, MB_BTYPE_VLC_BITS, 11, &table_mb_btype[0][1], 2, 1, &table_mb_btype[0][0], 2, 1, 64); ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]); @@ -701,1938 +155,66 @@ av_cold void ff_mpeg12_init_vlcs(void) } } -static inline int get_dmv(MpegEncContext *s) -{ - if (get_bits1(&s->gb)) - return 1 - (get_bits1(&s->gb) << 1); - else - return 0; -} - -static inline int get_qscale(MpegEncContext *s) -{ - int qscale = get_bits(&s->gb, 5); - if (s->q_scale_type) { - return non_linear_qscale[qscale]; - } else { - return qscale << 1; - } -} - -static void exchange_uv(MpegEncContext *s) -{ - int16_t (*tmp)[64]; - - tmp = s->pblocks[4]; - s->pblocks[4] = s->pblocks[5]; - s->pblocks[5] = tmp; -} - -/* motion type (for MPEG-2) */ -#define MT_FIELD 1 -#define MT_FRAME 2 -#define MT_16X8 2 -#define MT_DMV 3 - -static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64]) +/** + * Find the end of the current frame in the bitstream. + * @return the position of the first byte of the next frame, or -1 + */ +int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s) { - int i, j, k, cbp, val, mb_type, motion_type; - const int mb_block_count = 4 + (1 << s->chroma_format); - - av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y); - - assert(s->mb_skipped == 0); - - if (s->mb_skip_run-- != 0) { - if (s->pict_type == AV_PICTURE_TYPE_P) { - s->mb_skipped = 1; - s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; - } else { - int mb_type; - - if (s->mb_x) - mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1]; - else - mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1]; // FIXME not sure if this is allowed in MPEG at all - if (IS_INTRA(mb_type)) - return -1; - s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] = - mb_type | MB_TYPE_SKIP; -// assert(s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1] & (MB_TYPE_16x16 | MB_TYPE_16x8)); - - if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0) - s->mb_skipped = 1; - } + int i; + uint32_t state = pc->state; + /* EOF considered as end of frame */ + if (buf_size == 0) return 0; - } - - switch (s->pict_type) { - default: - case AV_PICTURE_TYPE_I: - if (get_bits1(&s->gb) == 0) { - if (get_bits1(&s->gb) == 0) { - av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA; - } else { - mb_type = MB_TYPE_INTRA; - } - break; - case AV_PICTURE_TYPE_P: - mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1); - if (mb_type < 0) { - av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - mb_type = ptype2mb_type[mb_type]; - break; - case AV_PICTURE_TYPE_B: - mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1); - if (mb_type < 0) { - av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - mb_type = btype2mb_type[mb_type]; - break; - } - av_dlog(s->avctx, "mb_type=%x\n", mb_type); -// motion_type = 0; /* avoid warning */ - if (IS_INTRA(mb_type)) { - s->dsp.clear_blocks(s->block[0]); - - if (!s->chroma_y_shift) { - s->dsp.clear_blocks(s->block[6]); - } - - /* compute DCT type */ - if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var? - !s->frame_pred_frame_dct) { - s->interlaced_dct = get_bits1(&s->gb); - } - - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); - - if (s->concealment_motion_vectors) { - /* just parse them */ - if (s->picture_structure != PICT_FRAME) - skip_bits1(&s->gb); /* field select */ - - s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] = - mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]); - s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] = - mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]); - skip_bits1(&s->gb); /* marker */ - } else - memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */ - s->mb_intra = 1; - // if 1, we memcpy blocks in xvmcvideo - if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) { - ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks - if (s->swap_uv) { - exchange_uv(s); - } - } - - if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) { - if (s->flags2 & CODEC_FLAG2_FAST) { - for (i = 0; i < 6; i++) { - mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i); - } - } else { - for (i = 0; i < mb_block_count; i++) { - if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0) - return -1; - } - } - } else { - for (i = 0; i < 6; i++) { - if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0) - return -1; - } - } - } else { - if (mb_type & MB_TYPE_ZERO_MV) { - assert(mb_type & MB_TYPE_CBP); +/* + 0 frame start -> 1/4 + 1 first_SEQEXT -> 0/2 + 2 first field start -> 3/0 + 3 second_SEQEXT -> 2/0 + 4 searching end +*/ - s->mv_dir = MV_DIR_FORWARD; - if (s->picture_structure == PICT_FRAME) { - if (!s->frame_pred_frame_dct) - s->interlaced_dct = get_bits1(&s->gb); - s->mv_type = MV_TYPE_16X16; - } else { - s->mv_type = MV_TYPE_FIELD; - mb_type |= MB_TYPE_INTERLACED; - s->field_select[0][0] = s->picture_structure - 1; + for (i = 0; i < buf_size; i++) { + assert(pc->frame_start_found >= 0 && pc->frame_start_found <= 4); + if (pc->frame_start_found & 1) { + if (state == EXT_START_CODE && (buf[i] & 0xF0) != 0x80) + pc->frame_start_found--; + else if (state == EXT_START_CODE + 2) { + if ((buf[i] & 3) == 3) + pc->frame_start_found = 0; + else + pc->frame_start_found = (pc->frame_start_found + 1) & 3; } - - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); - - s->last_mv[0][0][0] = 0; - s->last_mv[0][0][1] = 0; - s->last_mv[0][1][0] = 0; - s->last_mv[0][1][1] = 0; - s->mv[0][0][0] = 0; - s->mv[0][0][1] = 0; + state++; } else { - assert(mb_type & MB_TYPE_L0L1); - // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED - /* get additional motion vector type */ - if (s->frame_pred_frame_dct) - motion_type = MT_FRAME; - else { - motion_type = get_bits(&s->gb, 2); - if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type)) - s->interlaced_dct = get_bits1(&s->gb); - } - - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); - - /* motion vectors */ - s->mv_dir = (mb_type >> 13) & 3; - av_dlog(s->avctx, "motion_type=%d\n", motion_type); - switch (motion_type) { - case MT_FRAME: /* or MT_16X8 */ - if (s->picture_structure == PICT_FRAME) { - mb_type |= MB_TYPE_16x16; - s->mv_type = MV_TYPE_16X16; - for (i = 0; i < 2; i++) { - if (USES_LIST(mb_type, i)) { - /* MT_FRAME */ - s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] = - mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]); - s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] = - mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]); - /* full_pel: only for MPEG-1 */ - if (s->full_pel[i]) { - s->mv[i][0][0] <<= 1; - s->mv[i][0][1] <<= 1; - } - } - } - } else { - mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; - s->mv_type = MV_TYPE_16X8; - for (i = 0; i < 2; i++) { - if (USES_LIST(mb_type, i)) { - /* MT_16X8 */ - for (j = 0; j < 2; j++) { - s->field_select[i][j] = get_bits1(&s->gb); - for (k = 0; k < 2; k++) { - val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], - s->last_mv[i][j][k]); - s->last_mv[i][j][k] = val; - s->mv[i][j][k] = val; - } - } - } - } - } - break; - case MT_FIELD: - s->mv_type = MV_TYPE_FIELD; - if (s->picture_structure == PICT_FRAME) { - mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; - for (i = 0; i < 2; i++) { - if (USES_LIST(mb_type, i)) { - for (j = 0; j < 2; j++) { - s->field_select[i][j] = get_bits1(&s->gb); - val = mpeg_decode_motion(s, s->mpeg_f_code[i][0], - s->last_mv[i][j][0]); - s->last_mv[i][j][0] = val; - s->mv[i][j][0] = val; - av_dlog(s->avctx, "fmx=%d\n", val); - val = mpeg_decode_motion(s, s->mpeg_f_code[i][1], - s->last_mv[i][j][1] >> 1); - s->last_mv[i][j][1] = val << 1; - s->mv[i][j][1] = val; - av_dlog(s->avctx, "fmy=%d\n", val); - } - } - } - } else { - mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; - for (i = 0; i < 2; i++) { - if (USES_LIST(mb_type, i)) { - s->field_select[i][0] = get_bits1(&s->gb); - for (k = 0; k < 2; k++) { - val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], - s->last_mv[i][0][k]); - s->last_mv[i][0][k] = val; - s->last_mv[i][1][k] = val; - s->mv[i][0][k] = val; - } - } - } - } - break; - case MT_DMV: - s->mv_type = MV_TYPE_DMV; - for (i = 0; i < 2; i++) { - if (USES_LIST(mb_type, i)) { - int dmx, dmy, mx, my, m; - const int my_shift = s->picture_structure == PICT_FRAME; - - mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0], - s->last_mv[i][0][0]); - s->last_mv[i][0][0] = mx; - s->last_mv[i][1][0] = mx; - dmx = get_dmv(s); - my = mpeg_decode_motion(s, s->mpeg_f_code[i][1], - s->last_mv[i][0][1] >> my_shift); - dmy = get_dmv(s); - - - s->last_mv[i][0][1] = my << my_shift; - s->last_mv[i][1][1] = my << my_shift; - - s->mv[i][0][0] = mx; - s->mv[i][0][1] = my; - s->mv[i][1][0] = mx; // not used - s->mv[i][1][1] = my; // not used - - if (s->picture_structure == PICT_FRAME) { - mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; - - // m = 1 + 2 * s->top_field_first; - m = s->top_field_first ? 1 : 3; - - /* top -> top pred */ - s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx; - s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1; - m = 4 - m; - s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx; - s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1; - } else { - mb_type |= MB_TYPE_16x16; - - s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx; - s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy; - if (s->picture_structure == PICT_TOP_FIELD) - s->mv[i][2][1]--; - else - s->mv[i][2][1]++; - } - } - } - break; - default: - av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - } - - s->mb_intra = 0; - if (HAS_CBP(mb_type)) { - s->dsp.clear_blocks(s->block[0]); - - cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1); - if (mb_block_count > 6) { - cbp <<= mb_block_count - 6; - cbp |= get_bits(&s->gb, mb_block_count - 6); - s->dsp.clear_blocks(s->block[6]); + i = avpriv_find_start_code(buf + i, buf + buf_size, &state) - buf - 1; + if (pc->frame_start_found == 0 && state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE) { + i++; + pc->frame_start_found = 4; } - if (cbp <= 0) { - av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y); - return -1; + if (state == SEQ_END_CODE) { + pc->frame_start_found = 0; + pc->state=-1; + return i+1; } - - //if 1, we memcpy blocks in xvmcvideo - if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) { - ff_xvmc_pack_pblocks(s, cbp); - if (s->swap_uv) { - exchange_uv(s); + if (pc->frame_start_found == 2 && state == SEQ_START_CODE) + pc->frame_start_found = 0; + if (pc->frame_start_found < 4 && state == EXT_START_CODE) + pc->frame_start_found++; + if (pc->frame_start_found == 4 && (state & 0xFFFFFF00) == 0x100) { + if (state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE) { + pc->frame_start_found = 0; + pc->state = -1; + return i - 3; } } - - if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) { - if (s->flags2 & CODEC_FLAG2_FAST) { - for (i = 0; i < 6; i++) { - if (cbp & 32) { - mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i); - } else { - s->block_last_index[i] = -1; - } - cbp += cbp; - } - } else { - cbp <<= 12-mb_block_count; - - for (i = 0; i < mb_block_count; i++) { - if (cbp & (1 << 11)) { - if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0) - return -1; - } else { - s->block_last_index[i] = -1; - } - cbp += cbp; - } - } - } else { - if (s->flags2 & CODEC_FLAG2_FAST) { - for (i = 0; i < 6; i++) { - if (cbp & 32) { - mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i); - } else { - s->block_last_index[i] = -1; - } - cbp += cbp; - } - } else { - for (i = 0; i < 6; i++) { - if (cbp & 32) { - if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0) - return -1; - } else { - s->block_last_index[i] = -1; - } - cbp += cbp; - } - } + if (pc->frame_start_found == 0 && s && state == PICTURE_START_CODE) { + ff_fetch_timestamp(s, i - 3, 1); } - } else { - for (i = 0; i < 12; i++) - s->block_last_index[i] = -1; } } - - s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type; - - return 0; -} - -static av_cold int mpeg_decode_init(AVCodecContext *avctx) -{ - Mpeg1Context *s = avctx->priv_data; - MpegEncContext *s2 = &s->mpeg_enc_ctx; - int i; - - /* we need some permutation to store matrices, - * until MPV_common_init() sets the real permutation. */ - for (i = 0; i < 64; i++) - s2->dsp.idct_permutation[i]=i; - - ff_MPV_decode_defaults(s2); - - s->mpeg_enc_ctx.avctx = avctx; - s->mpeg_enc_ctx.flags = avctx->flags; - s->mpeg_enc_ctx.flags2 = avctx->flags2; - ff_mpeg12_common_init(&s->mpeg_enc_ctx); - ff_mpeg12_init_vlcs(); - - s->mpeg_enc_ctx_allocated = 0; - s->mpeg_enc_ctx.picture_number = 0; - s->repeat_field = 0; - s->mpeg_enc_ctx.codec_id = avctx->codec->id; - avctx->color_range = AVCOL_RANGE_MPEG; - if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO) - avctx->chroma_sample_location = AVCHROMA_LOC_CENTER; - else - avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; - return 0; + pc->state = state; + return END_NOT_FOUND; } - -static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from) -{ - Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data; - MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx; - int err; - - if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized) - return 0; - - err = ff_mpeg_update_thread_context(avctx, avctx_from); - if (err) return err; - - if (!ctx->mpeg_enc_ctx_allocated) - memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext)); - - if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay)) - s->picture_number++; - - return 0; -} - -static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm, - const uint8_t *new_perm) -{ - uint16_t temp_matrix[64]; - int i; - - memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t)); - - for (i = 0; i < 64; i++) { - matrix[new_perm[i]] = temp_matrix[old_perm[i]]; - } -} - -static const enum AVPixelFormat pixfmt_xvmc_mpg2_420[] = { - AV_PIX_FMT_XVMC_MPEG2_IDCT, - AV_PIX_FMT_XVMC_MPEG2_MC, - AV_PIX_FMT_NONE }; - -static const enum AVPixelFormat mpeg12_hwaccel_pixfmt_list_420[] = { -#if CONFIG_MPEG2_DXVA2_HWACCEL - AV_PIX_FMT_DXVA2_VLD, -#endif -#if CONFIG_MPEG2_VAAPI_HWACCEL - AV_PIX_FMT_VAAPI_VLD, -#endif -#if CONFIG_MPEG1_VDPAU_HWACCEL | CONFIG_MPEG2_VDPAU_HWACCEL - AV_PIX_FMT_VDPAU, -#endif - AV_PIX_FMT_YUV420P, - AV_PIX_FMT_NONE -}; - -static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - - if (avctx->xvmc_acceleration) - return avctx->get_format(avctx, pixfmt_xvmc_mpg2_420); - else if (avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) { - if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) - return AV_PIX_FMT_VDPAU_MPEG1; - else - return AV_PIX_FMT_VDPAU_MPEG2; - } else { - if (s->chroma_format < 2) - return avctx->get_format(avctx, mpeg12_hwaccel_pixfmt_list_420); - else if (s->chroma_format == 2) - return AV_PIX_FMT_YUV422P; - else - return AV_PIX_FMT_YUV444P; - } -} - -/* Call this function when we know all parameters. - * It may be called in different places for MPEG-1 and MPEG-2. */ -static int mpeg_decode_postinit(AVCodecContext *avctx) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - uint8_t old_permutation[64]; - - if ((s1->mpeg_enc_ctx_allocated == 0) || - avctx->coded_width != s->width || - avctx->coded_height != s->height || - s1->save_width != s->width || - s1->save_height != s->height || - s1->save_aspect_info != s->aspect_ratio_info || - s1->save_progressive_seq != s->progressive_sequence || - 0) - { - - if (s1->mpeg_enc_ctx_allocated) { - ParseContext pc = s->parse_context; - s->parse_context.buffer = 0; - ff_MPV_common_end(s); - s->parse_context = pc; - } - - if ((s->width == 0) || (s->height == 0)) - return -2; - - avcodec_set_dimensions(avctx, s->width, s->height); - avctx->bit_rate = s->bit_rate; - s1->save_aspect_info = s->aspect_ratio_info; - s1->save_width = s->width; - s1->save_height = s->height; - s1->save_progressive_seq = s->progressive_sequence; - - /* low_delay may be forced, in this case we will have B-frames - * that behave like P-frames. */ - avctx->has_b_frames = !s->low_delay; - - if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) { - //MPEG-1 fps - avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num; - avctx->time_base.num = ff_mpeg12_frame_rate_tab[s->frame_rate_index].den; - //MPEG-1 aspect - avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255); - avctx->ticks_per_frame=1; - } else {//MPEG-2 - //MPEG-2 fps - av_reduce(&s->avctx->time_base.den, - &s->avctx->time_base.num, - ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2, - ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den, - 1 << 30); - avctx->ticks_per_frame = 2; - //MPEG-2 aspect - if (s->aspect_ratio_info > 1) { - AVRational dar = - av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info], - (AVRational) {s1->pan_scan.width, s1->pan_scan.height}), - (AVRational) {s->width, s->height}); - - // we ignore the spec here and guess a bit as reality does not match the spec, see for example - // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg - // issue1613, 621, 562 - if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) || - (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) { - s->avctx->sample_aspect_ratio = - av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info], - (AVRational) {s->width, s->height}); - } else { - s->avctx->sample_aspect_ratio = - av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info], - (AVRational) {s1->pan_scan.width, s1->pan_scan.height}); -//issue1613 4/3 16/9 -> 16/9 -//res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3 -//widescreen-issue562.mpg 4/3 16/9 -> 16/9 -// s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height}); - av_dlog(avctx, "A %d/%d\n", - ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den); - av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num, - s->avctx->sample_aspect_ratio.den); - } - } else { - s->avctx->sample_aspect_ratio = - ff_mpeg2_aspect[s->aspect_ratio_info]; - } - } // MPEG-2 - - avctx->pix_fmt = mpeg_get_pixelformat(avctx); - avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt); - // until then pix_fmt may be changed right after codec init - if (avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT || - avctx->hwaccel || - s->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) - if (avctx->idct_algo == FF_IDCT_AUTO) - avctx->idct_algo = FF_IDCT_SIMPLE; - - /* Quantization matrices may need reordering - * if DCT permutation is changed. */ - memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t)); - - if (ff_MPV_common_init(s) < 0) - return -2; - - quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation); - quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation); - quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation); - quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation); - - s1->mpeg_enc_ctx_allocated = 1; - } - return 0; -} - -static int mpeg1_decode_picture(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int ref, f_code, vbv_delay; - - init_get_bits(&s->gb, buf, buf_size*8); - - ref = get_bits(&s->gb, 10); /* temporal ref */ - s->pict_type = get_bits(&s->gb, 3); - if (s->pict_type == 0 || s->pict_type > 3) - return -1; - - vbv_delay = get_bits(&s->gb, 16); - if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) { - s->full_pel[0] = get_bits1(&s->gb); - f_code = get_bits(&s->gb, 3); - if (f_code == 0 && (avctx->err_recognition & AV_EF_BITSTREAM)) - return -1; - s->mpeg_f_code[0][0] = f_code; - s->mpeg_f_code[0][1] = f_code; - } - if (s->pict_type == AV_PICTURE_TYPE_B) { - s->full_pel[1] = get_bits1(&s->gb); - f_code = get_bits(&s->gb, 3); - if (f_code == 0 && (avctx->err_recognition & AV_EF_BITSTREAM)) - return -1; - s->mpeg_f_code[1][0] = f_code; - s->mpeg_f_code[1][1] = f_code; - } - s->current_picture.f.pict_type = s->pict_type; - s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I; - - if (avctx->debug & FF_DEBUG_PICT_INFO) - av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type); - - s->y_dc_scale = 8; - s->c_dc_scale = 8; - return 0; -} - -static void mpeg_decode_sequence_extension(Mpeg1Context *s1) -{ - MpegEncContext *s= &s1->mpeg_enc_ctx; - int horiz_size_ext, vert_size_ext; - int bit_rate_ext; - - skip_bits(&s->gb, 1); /* profile and level esc*/ - s->avctx->profile = get_bits(&s->gb, 3); - s->avctx->level = get_bits(&s->gb, 4); - s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */ - s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */ - horiz_size_ext = get_bits(&s->gb, 2); - vert_size_ext = get_bits(&s->gb, 2); - s->width |= (horiz_size_ext << 12); - s->height |= (vert_size_ext << 12); - bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */ - s->bit_rate += (bit_rate_ext << 18) * 400; - skip_bits1(&s->gb); /* marker */ - s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10; - - s->low_delay = get_bits1(&s->gb); - if (s->flags & CODEC_FLAG_LOW_DELAY) - s->low_delay = 1; - - s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1; - s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1; - - av_dlog(s->avctx, "sequence extension\n"); - s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO; - - if (s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n", - s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate); - -} - -static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1) -{ - MpegEncContext *s = &s1->mpeg_enc_ctx; - int color_description, w, h; - - skip_bits(&s->gb, 3); /* video format */ - color_description = get_bits1(&s->gb); - if (color_description) { - s->avctx->color_primaries = get_bits(&s->gb, 8); - s->avctx->color_trc = get_bits(&s->gb, 8); - s->avctx->colorspace = get_bits(&s->gb, 8); - } - w = get_bits(&s->gb, 14); - skip_bits(&s->gb, 1); //marker - h = get_bits(&s->gb, 14); - // remaining 3 bits are zero padding - - s1->pan_scan.width = 16 * w; - s1->pan_scan.height = 16 * h; - - if (s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h); -} - -static void mpeg_decode_picture_display_extension(Mpeg1Context *s1) -{ - MpegEncContext *s = &s1->mpeg_enc_ctx; - int i, nofco; - - nofco = 1; - if (s->progressive_sequence) { - if (s->repeat_first_field) { - nofco++; - if (s->top_field_first) - nofco++; - } - } else { - if (s->picture_structure == PICT_FRAME) { - nofco++; - if (s->repeat_first_field) - nofco++; - } - } - for (i = 0; i < nofco; i++) { - s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16); - skip_bits(&s->gb, 1); // marker - s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16); - skip_bits(&s->gb, 1); // marker - } - - if (s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n", - s1->pan_scan.position[0][0], s1->pan_scan.position[0][1], - s1->pan_scan.position[1][0], s1->pan_scan.position[1][1], - s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]); -} - -static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra) -{ - int i; - - for (i = 0; i < 64; i++) { - int j = s->dsp.idct_permutation[ff_zigzag_direct[i]]; - int v = get_bits(&s->gb, 8); - if (v == 0) { - av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n"); - return -1; - } - if (intra && i == 0 && v != 8) { - av_log(s->avctx, AV_LOG_ERROR, "intra matrix invalid, ignoring\n"); - v = 8; // needed by pink.mpg / issue1046 - } - matrix0[j] = v; - if (matrix1) - matrix1[j] = v; - } - return 0; -} - -static void mpeg_decode_quant_matrix_extension(MpegEncContext *s) -{ - av_dlog(s->avctx, "matrix extension\n"); - - if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1); - if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0); - if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1); - if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0); -} - -static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1) -{ - MpegEncContext *s = &s1->mpeg_enc_ctx; - - s->full_pel[0] = s->full_pel[1] = 0; - s->mpeg_f_code[0][0] = get_bits(&s->gb, 4); - s->mpeg_f_code[0][1] = get_bits(&s->gb, 4); - s->mpeg_f_code[1][0] = get_bits(&s->gb, 4); - s->mpeg_f_code[1][1] = get_bits(&s->gb, 4); - if (!s->pict_type && s1->mpeg_enc_ctx_allocated) { - av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n"); - if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) { - if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15) - s->pict_type = AV_PICTURE_TYPE_I; - else - s->pict_type = AV_PICTURE_TYPE_P; - } else - s->pict_type = AV_PICTURE_TYPE_B; - s->current_picture.f.pict_type = s->pict_type; - s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I; - } - s->intra_dc_precision = get_bits(&s->gb, 2); - s->picture_structure = get_bits(&s->gb, 2); - s->top_field_first = get_bits1(&s->gb); - s->frame_pred_frame_dct = get_bits1(&s->gb); - s->concealment_motion_vectors = get_bits1(&s->gb); - s->q_scale_type = get_bits1(&s->gb); - s->intra_vlc_format = get_bits1(&s->gb); - s->alternate_scan = get_bits1(&s->gb); - s->repeat_first_field = get_bits1(&s->gb); - s->chroma_420_type = get_bits1(&s->gb); - s->progressive_frame = get_bits1(&s->gb); - - if (s->progressive_sequence && !s->progressive_frame) { - s->progressive_frame = 1; - av_log(s->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n"); - } - - if (s->picture_structure == 0 || (s->progressive_frame && s->picture_structure != PICT_FRAME)) { - av_log(s->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s->picture_structure); - s->picture_structure = PICT_FRAME; - } - - if (s->progressive_sequence && !s->frame_pred_frame_dct) { - av_log(s->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n"); - } - - if (s->picture_structure == PICT_FRAME) { - s->first_field = 0; - s->v_edge_pos = 16 * s->mb_height; - } else { - s->first_field ^= 1; - s->v_edge_pos = 8 * s->mb_height; - memset(s->mbskip_table, 0, s->mb_stride * s->mb_height); - } - - if (s->alternate_scan) { - ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan); - } else { - ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct); - } - - /* composite display not parsed */ - av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision); - av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure); - av_dlog(s->avctx, "top field first=%d\n", s->top_field_first); - av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field); - av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors); - av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format); - av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan); - av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct); - av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame); -} - -static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size) -{ - AVCodecContext *avctx = s->avctx; - Mpeg1Context *s1 = (Mpeg1Context*)s; - - /* start frame decoding */ - if (s->first_field || s->picture_structure == PICT_FRAME) { - AVFrameSideData *pan_scan; - - if (ff_MPV_frame_start(s, avctx) < 0) - return -1; - - ff_mpeg_er_frame_start(s); - - /* first check if we must repeat the frame */ - s->current_picture_ptr->f.repeat_pict = 0; - if (s->repeat_first_field) { - if (s->progressive_sequence) { - if (s->top_field_first) - s->current_picture_ptr->f.repeat_pict = 4; - else - s->current_picture_ptr->f.repeat_pict = 2; - } else if (s->progressive_frame) { - s->current_picture_ptr->f.repeat_pict = 1; - } - } - - pan_scan = av_frame_new_side_data(&s->current_picture_ptr->f, - AV_FRAME_DATA_PANSCAN, - sizeof(s1->pan_scan)); - if (!pan_scan) - return AVERROR(ENOMEM); - memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan)); - - if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME)) - ff_thread_finish_setup(avctx); - } else { // second field - int i; - - if (!s->current_picture_ptr) { - av_log(s->avctx, AV_LOG_ERROR, "first field missing\n"); - return -1; - } - - if (s->avctx->hwaccel && - (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) { - if (s->avctx->hwaccel->end_frame(s->avctx) < 0) - av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n"); - } - - for (i = 0; i < 4; i++) { - s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i]; - if (s->picture_structure == PICT_BOTTOM_FIELD) { - s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i]; - } - } - } - - if (avctx->hwaccel) { - if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0) - return -1; - } - -// MPV_frame_start will call this function too, -// but we need to call it on every field - if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration) - if (ff_xvmc_field_start(s, avctx) < 0) - return -1; - - return 0; -} - -#define DECODE_SLICE_ERROR -1 -#define DECODE_SLICE_OK 0 - -/** - * Decode a slice. - * MpegEncContext.mb_y must be set to the MB row from the startcode. - * @return DECODE_SLICE_ERROR if the slice is damaged, - * DECODE_SLICE_OK if this slice is OK - */ -static int mpeg_decode_slice(MpegEncContext *s, int mb_y, - const uint8_t **buf, int buf_size) -{ - AVCodecContext *avctx = s->avctx; - const int field_pic = s->picture_structure != PICT_FRAME; - - s->resync_mb_x = - s->resync_mb_y = -1; - - assert(mb_y < s->mb_height); - - init_get_bits(&s->gb, *buf, buf_size * 8); - - ff_mpeg1_clean_buffers(s); - s->interlaced_dct = 0; - - s->qscale = get_qscale(s); - - if (s->qscale == 0) { - av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n"); - return -1; - } - - /* extra slice info */ - while (get_bits1(&s->gb) != 0) { - skip_bits(&s->gb, 8); - } - - s->mb_x = 0; - - if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) { - skip_bits1(&s->gb); - } else { - while (get_bits_left(&s->gb) > 0) { - int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2); - if (code < 0) { - av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n"); - return -1; - } - if (code >= 33) { - if (code == 33) { - s->mb_x += 33; - } - /* otherwise, stuffing, nothing to do */ - } else { - s->mb_x += code; - break; - } - } - } - - if (s->mb_x >= (unsigned)s->mb_width) { - av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n"); - return -1; - } - - if (avctx->hwaccel) { - const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */ - int start_code = -1; - buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code); - if (buf_end < *buf + buf_size) - buf_end -= 4; - s->mb_y = mb_y; - if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0) - return DECODE_SLICE_ERROR; - *buf = buf_end; - return DECODE_SLICE_OK; - } - - s->resync_mb_x = s->mb_x; - s->resync_mb_y = s->mb_y = mb_y; - s->mb_skip_run = 0; - ff_init_block_index(s); - - if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) { - if (s->avctx->debug & FF_DEBUG_PICT_INFO) { - av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%2d%2d%2d%2d %s %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n", - s->qscale, s->mpeg_f_code[0][0], s->mpeg_f_code[0][1], s->mpeg_f_code[1][0], s->mpeg_f_code[1][1], - s->pict_type == AV_PICTURE_TYPE_I ? "I" : (s->pict_type == AV_PICTURE_TYPE_P ? "P" : (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")), - s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"", - s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors, - s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :""); - } - } - - for (;;) { - // If 1, we memcpy blocks in xvmcvideo. - if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) - ff_xvmc_init_block(s); // set s->block - - if (mpeg_decode_mb(s, s->block) < 0) - return -1; - - if (s->current_picture.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs - const int wrap = s->b8_stride; - int xy = s->mb_x * 2 + s->mb_y * 2 * wrap; - int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride); - int motion_x, motion_y, dir, i; - - for (i = 0; i < 2; i++) { - for (dir = 0; dir < 2; dir++) { - if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) { - motion_x = motion_y = 0; - } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) { - motion_x = s->mv[dir][0][0]; - motion_y = s->mv[dir][0][1]; - } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ { - motion_x = s->mv[dir][i][0]; - motion_y = s->mv[dir][i][1]; - } - - s->current_picture.motion_val[dir][xy ][0] = motion_x; - s->current_picture.motion_val[dir][xy ][1] = motion_y; - s->current_picture.motion_val[dir][xy + 1][0] = motion_x; - s->current_picture.motion_val[dir][xy + 1][1] = motion_y; - s->current_picture.ref_index [dir][b8_xy ] = - s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i]; - assert(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1); - } - xy += wrap; - b8_xy +=2; - } - } - - s->dest[0] += 16; - s->dest[1] += 16 >> s->chroma_x_shift; - s->dest[2] += 16 >> s->chroma_x_shift; - - ff_MPV_decode_mb(s, s->block); - - if (++s->mb_x >= s->mb_width) { - const int mb_size = 16; - - ff_mpeg_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size); - ff_MPV_report_decode_progress(s); - - s->mb_x = 0; - s->mb_y += 1 << field_pic; - - if (s->mb_y >= s->mb_height) { - int left = get_bits_left(&s->gb); - int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5 - && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0 - && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/; - - if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) - || ((avctx->err_recognition & AV_EF_BUFFER) && left > 8)) { - av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23))); - return -1; - } else - goto eos; - } - - ff_init_block_index(s); - } - - /* skip mb handling */ - if (s->mb_skip_run == -1) { - /* read increment again */ - s->mb_skip_run = 0; - for (;;) { - int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2); - if (code < 0) { - av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n"); - return -1; - } - if (code >= 33) { - if (code == 33) { - s->mb_skip_run += 33; - } else if (code == 35) { - if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n"); - return -1; - } - goto eos; /* end of slice */ - } - /* otherwise, stuffing, nothing to do */ - } else { - s->mb_skip_run += code; - break; - } - } - if (s->mb_skip_run) { - int i; - if (s->pict_type == AV_PICTURE_TYPE_I) { - av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - /* skip mb */ - s->mb_intra = 0; - for (i = 0; i < 12; i++) - s->block_last_index[i] = -1; - if (s->picture_structure == PICT_FRAME) - s->mv_type = MV_TYPE_16X16; - else - s->mv_type = MV_TYPE_FIELD; - if (s->pict_type == AV_PICTURE_TYPE_P) { - /* if P type, zero motion vector is implied */ - s->mv_dir = MV_DIR_FORWARD; - s->mv[0][0][0] = s->mv[0][0][1] = 0; - s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0; - s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0; - s->field_select[0][0] = (s->picture_structure - 1) & 1; - } else { - /* if B type, reuse previous vectors and directions */ - s->mv[0][0][0] = s->last_mv[0][0][0]; - s->mv[0][0][1] = s->last_mv[0][0][1]; - s->mv[1][0][0] = s->last_mv[1][0][0]; - s->mv[1][0][1] = s->last_mv[1][0][1]; - } - } - } - } -eos: // end of slice - *buf += (get_bits_count(&s->gb)-1)/8; - av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y); - return 0; -} - -static int slice_decode_thread(AVCodecContext *c, void *arg) -{ - MpegEncContext *s = *(void**)arg; - const uint8_t *buf = s->gb.buffer; - int mb_y = s->start_mb_y; - const int field_pic = s->picture_structure != PICT_FRAME; - - s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic; - - for (;;) { - uint32_t start_code; - int ret; - - ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf); - emms_c(); - av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n", - ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, - s->start_mb_y, s->end_mb_y, s->er.error_count); - if (ret < 0) { - if (c->err_recognition & AV_EF_EXPLODE) - return ret; - if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0) - ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR); - } else { - ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_AC_END | ER_DC_END | ER_MV_END); - } - - if (s->mb_y == s->end_mb_y) - return 0; - - start_code = -1; - buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code); - mb_y= (start_code - SLICE_MIN_START_CODE) << field_pic; - if (s->picture_structure == PICT_BOTTOM_FIELD) - mb_y++; - if (mb_y < 0 || mb_y >= s->end_mb_y) - return -1; - } -} - -/** - * Handle slice ends. - * @return 1 if it seems to be the last slice - */ -static int slice_end(AVCodecContext *avctx, AVFrame *pict) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - - if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr) - return 0; - - if (s->avctx->hwaccel) { - if (s->avctx->hwaccel->end_frame(s->avctx) < 0) - av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n"); - } - - if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration) - ff_xvmc_field_end(s); - - /* end of slice reached */ - if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field) { - /* end of image */ - - ff_er_frame_end(&s->er); - - ff_MPV_frame_end(s); - - if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) { - int ret = av_frame_ref(pict, &s->current_picture_ptr->f); - if (ret < 0) - return ret; - ff_print_debug_info(s, s->current_picture_ptr); - } else { - if (avctx->active_thread_type & FF_THREAD_FRAME) - s->picture_number++; - /* latency of 1 frame for I- and P-frames */ - /* XXX: use another variable than picture_number */ - if (s->last_picture_ptr != NULL) { - int ret = av_frame_ref(pict, &s->last_picture_ptr->f); - if (ret < 0) - return ret; - ff_print_debug_info(s, s->last_picture_ptr); - } - } - - return 1; - } else { - return 0; - } -} - -static int mpeg1_decode_sequence(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int width, height; - int i, v, j; - - init_get_bits(&s->gb, buf, buf_size*8); - - width = get_bits(&s->gb, 12); - height = get_bits(&s->gb, 12); - if (width == 0 || height == 0) { - av_log(avctx, AV_LOG_WARNING, "Invalid horizontal or vertical size " - "value.\n"); - if (avctx->err_recognition & AV_EF_BITSTREAM) - return AVERROR_INVALIDDATA; - } - s->aspect_ratio_info = get_bits(&s->gb, 4); - if (s->aspect_ratio_info == 0) { - av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n"); - if (avctx->err_recognition & AV_EF_BITSTREAM) - return -1; - } - s->frame_rate_index = get_bits(&s->gb, 4); - if (s->frame_rate_index == 0 || s->frame_rate_index > 13) - return -1; - s->bit_rate = get_bits(&s->gb, 18) * 400; - if (get_bits1(&s->gb) == 0) /* marker */ - return -1; - s->width = width; - s->height = height; - - s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16; - skip_bits(&s->gb, 1); - - /* get matrix */ - if (get_bits1(&s->gb)) { - load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1); - } else { - for (i = 0; i < 64; i++) { - j = s->dsp.idct_permutation[i]; - v = ff_mpeg1_default_intra_matrix[i]; - s->intra_matrix[j] = v; - s->chroma_intra_matrix[j] = v; - } - } - if (get_bits1(&s->gb)) { - load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0); - } else { - for (i = 0; i < 64; i++) { - int j = s->dsp.idct_permutation[i]; - v = ff_mpeg1_default_non_intra_matrix[i]; - s->inter_matrix[j] = v; - s->chroma_inter_matrix[j] = v; - } - } - - if (show_bits(&s->gb, 23) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n"); - return -1; - } - - /* we set MPEG-2 parameters so that it emulates MPEG-1 */ - s->progressive_sequence = 1; - s->progressive_frame = 1; - s->picture_structure = PICT_FRAME; - s->frame_pred_frame_dct = 1; - s->chroma_format = 1; - s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO; - s->out_format = FMT_MPEG1; - s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER - if (s->flags & CODEC_FLAG_LOW_DELAY) - s->low_delay = 1; - - if (s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n", - s->avctx->rc_buffer_size, s->bit_rate); - - return 0; -} - -static int vcr2_init_sequence(AVCodecContext *avctx) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int i, v; - - /* start new MPEG-1 context decoding */ - s->out_format = FMT_MPEG1; - if (s1->mpeg_enc_ctx_allocated) { - ff_MPV_common_end(s); - } - s->width = avctx->coded_width; - s->height = avctx->coded_height; - avctx->has_b_frames = 0; // true? - s->low_delay = 1; - - avctx->pix_fmt = mpeg_get_pixelformat(avctx); - avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt); - - if (avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel || - s->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) - if (avctx->idct_algo == FF_IDCT_AUTO) - avctx->idct_algo = FF_IDCT_SIMPLE; - - if (ff_MPV_common_init(s) < 0) - return -1; - exchange_uv(s); // common init reset pblocks, so we swap them here - s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB - s1->mpeg_enc_ctx_allocated = 1; - - for (i = 0; i < 64; i++) { - int j = s->dsp.idct_permutation[i]; - v = ff_mpeg1_default_intra_matrix[i]; - s->intra_matrix[j] = v; - s->chroma_intra_matrix[j] = v; - - v = ff_mpeg1_default_non_intra_matrix[i]; - s->inter_matrix[j] = v; - s->chroma_inter_matrix[j] = v; - } - - s->progressive_sequence = 1; - s->progressive_frame = 1; - s->picture_structure = PICT_FRAME; - s->frame_pred_frame_dct = 1; - s->chroma_format = 1; - s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO; - s1->save_width = s->width; - s1->save_height = s->height; - s1->save_progressive_seq = s->progressive_sequence; - return 0; -} - - -static void mpeg_decode_user_data(AVCodecContext *avctx, - const uint8_t *p, int buf_size) -{ - const uint8_t *buf_end = p + buf_size; - - /* we parse the DTG active format information */ - if (buf_end - p >= 5 && - p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') { - int flags = p[4]; - p += 5; - if (flags & 0x80) { - /* skip event id */ - p += 2; - } - if (flags & 0x40) { - if (buf_end - p < 1) - return; - avctx->dtg_active_format = p[0] & 0x0f; - } - } -} - -static void mpeg_decode_gop(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - - int time_code_hours, time_code_minutes; - int time_code_seconds, time_code_pictures; - int broken_link; - - init_get_bits(&s->gb, buf, buf_size*8); - - skip_bits1(&s->gb); /* drop_frame_flag */ - - time_code_hours = get_bits(&s->gb, 5); - time_code_minutes = get_bits(&s->gb, 6); - skip_bits1(&s->gb); // marker bit - time_code_seconds = get_bits(&s->gb, 6); - time_code_pictures = get_bits(&s->gb, 6); - - s1->closed_gop = get_bits1(&s->gb); - /*broken_link indicate that after editing the - reference frames of the first B-Frames after GOP I-Frame - are missing (open gop)*/ - broken_link = get_bits1(&s->gb); - - if (s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) closed_gop=%d broken_link=%d\n", - time_code_hours, time_code_minutes, time_code_seconds, - time_code_pictures, s1->closed_gop, broken_link); -} -/** - * Find the end of the current frame in the bitstream. - * @return the position of the first byte of the next frame, or -1 - */ -int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s) -{ - int i; - uint32_t state = pc->state; - - /* EOF considered as end of frame */ - if (buf_size == 0) - return 0; - -/* - 0 frame start -> 1/4 - 1 first_SEQEXT -> 0/2 - 2 first field start -> 3/0 - 3 second_SEQEXT -> 2/0 - 4 searching end -*/ - - for (i = 0; i < buf_size; i++) { - assert(pc->frame_start_found >= 0 && pc->frame_start_found <= 4); - if (pc->frame_start_found & 1) { - if (state == EXT_START_CODE && (buf[i] & 0xF0) != 0x80) - pc->frame_start_found--; - else if (state == EXT_START_CODE + 2) { - if ((buf[i] & 3) == 3) - pc->frame_start_found = 0; - else - pc->frame_start_found = (pc->frame_start_found + 1) & 3; - } - state++; - } else { - i = avpriv_find_start_code(buf + i, buf + buf_size, &state) - buf - 1; - if (pc->frame_start_found == 0 && state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE) { - i++; - pc->frame_start_found = 4; - } - if (state == SEQ_END_CODE) { - pc->frame_start_found = 0; - pc->state=-1; - return i+1; - } - if (pc->frame_start_found == 2 && state == SEQ_START_CODE) - pc->frame_start_found = 0; - if (pc->frame_start_found < 4 && state == EXT_START_CODE) - pc->frame_start_found++; - if (pc->frame_start_found == 4 && (state & 0xFFFFFF00) == 0x100) { - if (state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE) { - pc->frame_start_found = 0; - pc->state = -1; - return i - 3; - } - } - if (pc->frame_start_found == 0 && s && state == PICTURE_START_CODE) { - ff_fetch_timestamp(s, i - 3, 1); - } - } - } - pc->state = state; - return END_NOT_FOUND; -} - -static int decode_chunks(AVCodecContext *avctx, - AVFrame *picture, int *got_output, - const uint8_t *buf, int buf_size) -{ - Mpeg1Context *s = avctx->priv_data; - MpegEncContext *s2 = &s->mpeg_enc_ctx; - const uint8_t *buf_ptr = buf; - const uint8_t *buf_end = buf + buf_size; - int ret, input_size; - int last_code = 0; - - for (;;) { - /* find next start code */ - uint32_t start_code = -1; - buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code); - if (start_code > 0x1ff) { - if (s2->pict_type != AV_PICTURE_TYPE_B || avctx->skip_frame <= AVDISCARD_DEFAULT) { - if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) { - int i; - - avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*)); - for (i = 0; i < s->slice_count; i++) - s2->er.error_count += s2->thread_context[i]->er.error_count; - } - - if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER) - && avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) - ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count); - - ret = slice_end(avctx, picture); - if (ret < 0) - return ret; - else if (ret) { - if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice - *got_output = 1; - } - } - s2->pict_type = 0; - return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index); - } - - input_size = buf_end - buf_ptr; - - if (avctx->debug & FF_DEBUG_STARTCODE) { - av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size); - } - - /* prepare data for next start code */ - switch (start_code) { - case SEQ_START_CODE: - if (last_code == 0) { - mpeg1_decode_sequence(avctx, buf_ptr, input_size); - s->sync=1; - } else { - av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code); - if (avctx->err_recognition & AV_EF_EXPLODE) - return AVERROR_INVALIDDATA; - } - break; - - case PICTURE_START_CODE: - if (s2->width <= 0 || s2->height <= 0) { - av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n", - s2->width, s2->height); - return AVERROR_INVALIDDATA; - } - - if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) && s->slice_count) { - int i; - - avctx->execute(avctx, slice_decode_thread, - s2->thread_context, NULL, - s->slice_count, sizeof(void*)); - for (i = 0; i < s->slice_count; i++) - s2->er.error_count += s2->thread_context[i]->er.error_count; - s->slice_count = 0; - } - if (last_code == 0 || last_code == SLICE_MIN_START_CODE) { - ret = mpeg_decode_postinit(avctx); - if (ret < 0) { - av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n"); - return ret; - } - - /* we have a complete image: we try to decompress it */ - if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0) - s2->pict_type = 0; - s2->first_slice = 1; - last_code = PICTURE_START_CODE; - } else { - av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code); - if (avctx->err_recognition & AV_EF_EXPLODE) - return AVERROR_INVALIDDATA; - } - break; - case EXT_START_CODE: - init_get_bits(&s2->gb, buf_ptr, input_size*8); - - switch (get_bits(&s2->gb, 4)) { - case 0x1: - if (last_code == 0) { - mpeg_decode_sequence_extension(s); - } else { - av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code); - if (avctx->err_recognition & AV_EF_EXPLODE) - return AVERROR_INVALIDDATA; - } - break; - case 0x2: - mpeg_decode_sequence_display_extension(s); - break; - case 0x3: - mpeg_decode_quant_matrix_extension(s2); - break; - case 0x7: - mpeg_decode_picture_display_extension(s); - break; - case 0x8: - if (last_code == PICTURE_START_CODE) { - mpeg_decode_picture_coding_extension(s); - } else { - av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code); - if (avctx->err_recognition & AV_EF_EXPLODE) - return AVERROR_INVALIDDATA; - } - break; - } - break; - case USER_START_CODE: - mpeg_decode_user_data(avctx, buf_ptr, input_size); - break; - case GOP_START_CODE: - if (last_code == 0) { - s2->first_field=0; - mpeg_decode_gop(avctx, buf_ptr, input_size); - s->sync=1; - } else { - av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code); - if (avctx->err_recognition & AV_EF_EXPLODE) - return AVERROR_INVALIDDATA; - } - break; - default: - if (start_code >= SLICE_MIN_START_CODE && - start_code <= SLICE_MAX_START_CODE && last_code != 0) { - const int field_pic = s2->picture_structure != PICT_FRAME; - int mb_y = (start_code - SLICE_MIN_START_CODE) << field_pic; - last_code = SLICE_MIN_START_CODE; - - if (s2->picture_structure == PICT_BOTTOM_FIELD) - mb_y++; - - if (mb_y >= s2->mb_height) { - av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height); - return -1; - } - - if (s2->last_picture_ptr == NULL) { - /* Skip B-frames if we do not have reference frames and gop is not closed */ - if (s2->pict_type == AV_PICTURE_TYPE_B) { - if (!s->closed_gop) - break; - } - } - if (s2->pict_type == AV_PICTURE_TYPE_I) - s->sync=1; - if (s2->next_picture_ptr == NULL) { - /* Skip P-frames if we do not have a reference frame or we have an invalid header. */ - if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) break; - } - if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) || - (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) || - avctx->skip_frame >= AVDISCARD_ALL) - break; - - if (!s->mpeg_enc_ctx_allocated) - break; - - if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) { - if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom) - break; - } - - if (!s2->pict_type) { - av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n"); - if (avctx->err_recognition & AV_EF_EXPLODE) - return AVERROR_INVALIDDATA; - break; - } - - if (s2->first_slice) { - s2->first_slice = 0; - if (mpeg_field_start(s2, buf, buf_size) < 0) - return -1; - } - if (!s2->current_picture_ptr) { - av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n"); - return AVERROR_INVALIDDATA; - } - - if (avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) { - s->slice_count++; - break; - } - - if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) { - int threshold = (s2->mb_height * s->slice_count + - s2->slice_context_count / 2) / - s2->slice_context_count; - if (threshold <= mb_y) { - MpegEncContext *thread_context = s2->thread_context[s->slice_count]; - - thread_context->start_mb_y = mb_y; - thread_context->end_mb_y = s2->mb_height; - if (s->slice_count) { - s2->thread_context[s->slice_count-1]->end_mb_y = mb_y; - ret = ff_update_duplicate_context(thread_context, - s2); - if (ret < 0) - return ret; - } - init_get_bits(&thread_context->gb, buf_ptr, input_size*8); - s->slice_count++; - } - buf_ptr += 2; // FIXME add minimum number of bytes per slice - } else { - ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size); - emms_c(); - - if (ret < 0) { - if (avctx->err_recognition & AV_EF_EXPLODE) - return ret; - if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0) - ff_er_add_slice(&s2->er, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x, s2->mb_y, ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR); - } else { - ff_er_add_slice(&s2->er, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, ER_AC_END | ER_DC_END | ER_MV_END); - } - } - } - break; - } - } -} - -static int mpeg_decode_frame(AVCodecContext *avctx, - void *data, int *got_output, - AVPacket *avpkt) -{ - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - Mpeg1Context *s = avctx->priv_data; - AVFrame *picture = data; - MpegEncContext *s2 = &s->mpeg_enc_ctx; - av_dlog(avctx, "fill_buffer\n"); - - if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) { - /* special case for last picture */ - if (s2->low_delay == 0 && s2->next_picture_ptr) { - int ret = av_frame_ref(picture, &s2->next_picture_ptr->f); - if (ret < 0) - return ret; - - s2->next_picture_ptr = NULL; - - *got_output = 1; - } - return buf_size; - } - - if (s2->flags & CODEC_FLAG_TRUNCATED) { - int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL); - - if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0) - return buf_size; - } - - if (s->mpeg_enc_ctx_allocated == 0 && avctx->codec_tag == AV_RL32("VCR2")) - vcr2_init_sequence(avctx); - - s->slice_count = 0; - - if (avctx->extradata && !s->extradata_decoded) { - int ret = decode_chunks(avctx, picture, got_output, avctx->extradata, avctx->extradata_size); - s->extradata_decoded = 1; - if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) - return ret; - } - - return decode_chunks(avctx, picture, got_output, buf, buf_size); -} - - -static void flush(AVCodecContext *avctx) -{ - Mpeg1Context *s = avctx->priv_data; - - s->sync=0; - s->closed_gop = 0; - - ff_mpeg_flush(avctx); -} - -static int mpeg_decode_end(AVCodecContext *avctx) -{ - Mpeg1Context *s = avctx->priv_data; - - if (s->mpeg_enc_ctx_allocated) - ff_MPV_common_end(&s->mpeg_enc_ctx); - return 0; -} - -static const AVProfile mpeg2_video_profiles[] = { - { FF_PROFILE_MPEG2_422, "4:2:2" }, - { FF_PROFILE_MPEG2_HIGH, "High" }, - { FF_PROFILE_MPEG2_SS, "Spatially Scalable" }, - { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" }, - { FF_PROFILE_MPEG2_MAIN, "Main" }, - { FF_PROFILE_MPEG2_SIMPLE, "Simple" }, - { FF_PROFILE_RESERVED, "Reserved" }, - { FF_PROFILE_RESERVED, "Reserved" }, - { FF_PROFILE_UNKNOWN }, -}; - - -AVCodec ff_mpeg1video_decoder = { - .name = "mpeg1video", - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_MPEG1VIDEO, - .priv_data_size = sizeof(Mpeg1Context), - .init = mpeg_decode_init, - .close = mpeg_decode_end, - .decode = mpeg_decode_frame, - .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | - CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | - CODEC_CAP_SLICE_THREADS, - .flush = flush, - .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"), - .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context) -}; - -AVCodec ff_mpeg2video_decoder = { - .name = "mpeg2video", - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_MPEG2VIDEO, - .priv_data_size = sizeof(Mpeg1Context), - .init = mpeg_decode_init, - .close = mpeg_decode_end, - .decode = mpeg_decode_frame, - .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | - CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | - CODEC_CAP_SLICE_THREADS, - .flush = flush, - .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"), - .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles), -}; - -#if CONFIG_MPEG_XVMC_DECODER -static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx) -{ - if (avctx->active_thread_type & FF_THREAD_SLICE) - return -1; - if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER)) - return -1; - if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) { - av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n"); - } - mpeg_decode_init(avctx); - - avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT; - avctx->xvmc_acceleration = 2; // 2 - the blocks are packed! - - return 0; -} - -AVCodec ff_mpeg_xvmc_decoder = { - .name = "mpegvideo_xvmc", - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_MPEG2VIDEO_XVMC, - .priv_data_size = sizeof(Mpeg1Context), - .init = mpeg_mc_decode_init, - .close = mpeg_decode_end, - .decode = mpeg_decode_frame, - .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | - CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY, - .flush = flush, - .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"), -}; - -#endif - -#if CONFIG_MPEG_VDPAU_DECODER -AVCodec ff_mpeg_vdpau_decoder = { - .name = "mpegvideo_vdpau", - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_MPEG2VIDEO, - .priv_data_size = sizeof(Mpeg1Context), - .init = mpeg_decode_init, - .close = mpeg_decode_end, - .decode = mpeg_decode_frame, - .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | - CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY, - .flush = flush, - .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"), -}; -#endif - -#if CONFIG_MPEG1_VDPAU_DECODER -AVCodec ff_mpeg1_vdpau_decoder = { - .name = "mpeg1video_vdpau", - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_MPEG1VIDEO, - .priv_data_size = sizeof(Mpeg1Context), - .init = mpeg_decode_init, - .close = mpeg_decode_end, - .decode = mpeg_decode_frame, - .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | - CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY, - .flush = flush, - .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"), -}; -#endif diff --git a/libavcodec/mpeg12.h b/libavcodec/mpeg12.h index 39c45a59d5..fc76511435 100644 --- a/libavcodec/mpeg12.h +++ b/libavcodec/mpeg12.h @@ -25,10 +25,21 @@ #include "mpegvideo.h" #define DC_VLC_BITS 9 +#define MV_VLC_BITS 9 #define TEX_VLC_BITS 9 +#define MBINCR_VLC_BITS 9 +#define MB_PAT_VLC_BITS 9 +#define MB_PTYPE_VLC_BITS 6 +#define MB_BTYPE_VLC_BITS 6 + extern VLC ff_dc_lum_vlc; extern VLC ff_dc_chroma_vlc; +extern VLC ff_mbincr_vlc; +extern VLC ff_mb_ptype_vlc; +extern VLC ff_mb_btype_vlc; +extern VLC ff_mb_pat_vlc; +extern VLC ff_mv_vlc; typedef struct Mpeg1Context { MpegEncContext mpeg_enc_ctx; diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c new file mode 100644 index 0000000000..6c95f0f0d8 --- /dev/null +++ b/libavcodec/mpeg12dec.c @@ -0,0 +1,2461 @@ +/* + * MPEG-1/2 decoder + * Copyright (c) 2000, 2001 Fabrice Bellard + * Copyright (c) 2002-2004 Michael Niedermayer + * + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * MPEG-1/2 decoder + */ + +//#define DEBUG +#include "libavutil/internal.h" +#include "internal.h" +#include "avcodec.h" +#include "dsputil.h" +#include "mpegvideo.h" +#include "error_resilience.h" +#include "mpeg12.h" +#include "mpeg12data.h" +#include "mpeg12decdata.h" +#include "bytestream.h" +#include "vdpau_internal.h" +#include "xvmc_internal.h" +#include "thread.h" + +//#undef NDEBUG +//#include + +/* as H.263, but only 17 codes */ +static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred) +{ + int code, sign, val, shift; + + code = get_vlc2(&s->gb, ff_mv_vlc.table, MV_VLC_BITS, 2); + if (code == 0) { + return pred; + } + if (code < 0) { + return 0xffff; + } + + sign = get_bits1(&s->gb); + shift = fcode - 1; + val = code; + if (shift) { + val = (val - 1) << shift; + val |= get_bits(&s->gb, shift); + val++; + } + if (sign) + val = -val; + val += pred; + + /* modulo decoding */ + return sign_extend(val, 5 + shift); +} + +static inline int mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n) +{ + int level, dc, diff, i, j, run; + int component; + RLTable *rl = &ff_rl_mpeg1; + uint8_t * const scantable = s->intra_scantable.permutated; + const uint16_t *quant_matrix = s->intra_matrix; + const int qscale = s->qscale; + + /* DC coefficient */ + component = (n <= 3 ? 0 : n - 4 + 1); + diff = decode_dc(&s->gb, component); + if (diff >= 0xffff) + return -1; + dc = s->last_dc[component]; + dc += diff; + s->last_dc[component] = dc; + block[0] = dc * quant_matrix[0]; + av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff); + i = 0; + { + OPEN_READER(re, &s->gb); + /* now quantify & encode AC coefficients */ + for (;;) { + UPDATE_CACHE(re, &s->gb); + GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); + + if (level == 127) { + break; + } else if (level != 0) { + i += run; + j = scantable[i]; + level = (level * qscale * quant_matrix[j]) >> 4; + level = (level - 1) | 1; + level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); + LAST_SKIP_BITS(re, &s->gb, 1); + } else { + /* escape */ + run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); + UPDATE_CACHE(re, &s->gb); + level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); + if (level == -128) { + level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8); + } else if (level == 0) { + level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8); + } + i += run; + j = scantable[i]; + if (level < 0) { + level = -level; + level = (level * qscale * quant_matrix[j]) >> 4; + level = (level - 1) | 1; + level = -level; + } else { + level = (level * qscale * quant_matrix[j]) >> 4; + level = (level - 1) | 1; + } + } + if (i > 63) { + av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + + block[j] = level; + } + CLOSE_READER(re, &s->gb); + } + s->block_last_index[n] = i; + return 0; +} + +int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n) +{ + return mpeg1_decode_block_intra(s, block, n); +} + +static inline int mpeg1_decode_block_inter(MpegEncContext *s, int16_t *block, int n) +{ + int level, i, j, run; + RLTable *rl = &ff_rl_mpeg1; + uint8_t * const scantable = s->intra_scantable.permutated; + const uint16_t *quant_matrix = s->inter_matrix; + const int qscale = s->qscale; + + { + OPEN_READER(re, &s->gb); + i = -1; + // special case for first coefficient, no need to add second VLC table + UPDATE_CACHE(re, &s->gb); + if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { + level = (3 * qscale * quant_matrix[0]) >> 5; + level = (level - 1) | 1; + if (GET_CACHE(re, &s->gb) & 0x40000000) + level = -level; + block[0] = level; + i++; + SKIP_BITS(re, &s->gb, 2); + if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) + goto end; + } + /* now quantify & encode AC coefficients */ + for (;;) { + GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); + + if (level != 0) { + i += run; + j = scantable[i]; + level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; + level = (level - 1) | 1; + level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); + SKIP_BITS(re, &s->gb, 1); + } else { + /* escape */ + run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); + UPDATE_CACHE(re, &s->gb); + level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); + if (level == -128) { + level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8); + } else if (level == 0) { + level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8); + } + i += run; + j = scantable[i]; + if (level < 0) { + level = -level; + level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; + level = (level - 1) | 1; + level = -level; + } else { + level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; + level = (level - 1) | 1; + } + } + if (i > 63) { + av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + + block[j] = level; + if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) + break; + UPDATE_CACHE(re, &s->gb); + } +end: + LAST_SKIP_BITS(re, &s->gb, 2); + CLOSE_READER(re, &s->gb); + } + s->block_last_index[n] = i; + return 0; +} + +static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *block, int n) +{ + int level, i, j, run; + RLTable *rl = &ff_rl_mpeg1; + uint8_t * const scantable = s->intra_scantable.permutated; + const int qscale = s->qscale; + + { + OPEN_READER(re, &s->gb); + i = -1; + // special case for first coefficient, no need to add second VLC table + UPDATE_CACHE(re, &s->gb); + if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { + level = (3 * qscale) >> 1; + level = (level - 1) | 1; + if (GET_CACHE(re, &s->gb) & 0x40000000) + level = -level; + block[0] = level; + i++; + SKIP_BITS(re, &s->gb, 2); + if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) + goto end; + } + + /* now quantify & encode AC coefficients */ + for (;;) { + GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); + + if (level != 0) { + i += run; + j = scantable[i]; + level = ((level * 2 + 1) * qscale) >> 1; + level = (level - 1) | 1; + level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); + SKIP_BITS(re, &s->gb, 1); + } else { + /* escape */ + run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); + UPDATE_CACHE(re, &s->gb); + level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); + if (level == -128) { + level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8); + } else if (level == 0) { + level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8); + } + i += run; + j = scantable[i]; + if (level < 0) { + level = -level; + level = ((level * 2 + 1) * qscale) >> 1; + level = (level - 1) | 1; + level = -level; + } else { + level = ((level * 2 + 1) * qscale) >> 1; + level = (level - 1) | 1; + } + } + + block[j] = level; + if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) + break; + UPDATE_CACHE(re, &s->gb); + } +end: + LAST_SKIP_BITS(re, &s->gb, 2); + CLOSE_READER(re, &s->gb); + } + s->block_last_index[n] = i; + return 0; +} + + +static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, int16_t *block, int n) +{ + int level, i, j, run; + RLTable *rl = &ff_rl_mpeg1; + uint8_t * const scantable = s->intra_scantable.permutated; + const uint16_t *quant_matrix; + const int qscale = s->qscale; + int mismatch; + + mismatch = 1; + + { + OPEN_READER(re, &s->gb); + i = -1; + if (n < 4) + quant_matrix = s->inter_matrix; + else + quant_matrix = s->chroma_inter_matrix; + + // special case for first coefficient, no need to add second VLC table + UPDATE_CACHE(re, &s->gb); + if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { + level= (3 * qscale * quant_matrix[0]) >> 5; + if (GET_CACHE(re, &s->gb) & 0x40000000) + level = -level; + block[0] = level; + mismatch ^= level; + i++; + SKIP_BITS(re, &s->gb, 2); + if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) + goto end; + } + + /* now quantify & encode AC coefficients */ + for (;;) { + GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); + + if (level != 0) { + i += run; + j = scantable[i]; + level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; + level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); + SKIP_BITS(re, &s->gb, 1); + } else { + /* escape */ + run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); + UPDATE_CACHE(re, &s->gb); + level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); + + i += run; + j = scantable[i]; + if (level < 0) { + level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5; + level = -level; + } else { + level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5; + } + } + if (i > 63) { + av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + + mismatch ^= level; + block[j] = level; + if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) + break; + UPDATE_CACHE(re, &s->gb); + } +end: + LAST_SKIP_BITS(re, &s->gb, 2); + CLOSE_READER(re, &s->gb); + } + block[63] ^= (mismatch & 1); + + s->block_last_index[n] = i; + return 0; +} + +static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, + int16_t *block, int n) +{ + int level, i, j, run; + RLTable *rl = &ff_rl_mpeg1; + uint8_t * const scantable = s->intra_scantable.permutated; + const int qscale = s->qscale; + OPEN_READER(re, &s->gb); + i = -1; + + // special case for first coefficient, no need to add second VLC table + UPDATE_CACHE(re, &s->gb); + if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { + level = (3 * qscale) >> 1; + if (GET_CACHE(re, &s->gb) & 0x40000000) + level = -level; + block[0] = level; + i++; + SKIP_BITS(re, &s->gb, 2); + if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) + goto end; + } + + /* now quantify & encode AC coefficients */ + for (;;) { + GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); + + if (level != 0) { + i += run; + j = scantable[i]; + level = ((level * 2 + 1) * qscale) >> 1; + level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); + SKIP_BITS(re, &s->gb, 1); + } else { + /* escape */ + run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); + UPDATE_CACHE(re, &s->gb); + level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); + + i += run; + j = scantable[i]; + if (level < 0) { + level = ((-level * 2 + 1) * qscale) >> 1; + level = -level; + } else { + level = ((level * 2 + 1) * qscale) >> 1; + } + } + + block[j] = level; + if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) + break; + UPDATE_CACHE(re, &s->gb); + } +end: + LAST_SKIP_BITS(re, &s->gb, 2); + CLOSE_READER(re, &s->gb); + s->block_last_index[n] = i; + return 0; +} + + +static inline int mpeg2_decode_block_intra(MpegEncContext *s, int16_t *block, int n) +{ + int level, dc, diff, i, j, run; + int component; + RLTable *rl; + uint8_t * const scantable = s->intra_scantable.permutated; + const uint16_t *quant_matrix; + const int qscale = s->qscale; + int mismatch; + + /* DC coefficient */ + if (n < 4) { + quant_matrix = s->intra_matrix; + component = 0; + } else { + quant_matrix = s->chroma_intra_matrix; + component = (n & 1) + 1; + } + diff = decode_dc(&s->gb, component); + if (diff >= 0xffff) + return -1; + dc = s->last_dc[component]; + dc += diff; + s->last_dc[component] = dc; + block[0] = dc << (3 - s->intra_dc_precision); + av_dlog(s->avctx, "dc=%d\n", block[0]); + mismatch = block[0] ^ 1; + i = 0; + if (s->intra_vlc_format) + rl = &ff_rl_mpeg2; + else + rl = &ff_rl_mpeg1; + + { + OPEN_READER(re, &s->gb); + /* now quantify & encode AC coefficients */ + for (;;) { + UPDATE_CACHE(re, &s->gb); + GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); + + if (level == 127) { + break; + } else if (level != 0) { + i += run; + j = scantable[i]; + level = (level * qscale * quant_matrix[j]) >> 4; + level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); + LAST_SKIP_BITS(re, &s->gb, 1); + } else { + /* escape */ + run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); + UPDATE_CACHE(re, &s->gb); + level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); + i += run; + j = scantable[i]; + if (level < 0) { + level = (-level * qscale * quant_matrix[j]) >> 4; + level = -level; + } else { + level = (level * qscale * quant_matrix[j]) >> 4; + } + } + if (i > 63) { + av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + + mismatch ^= level; + block[j] = level; + } + CLOSE_READER(re, &s->gb); + } + block[63] ^= mismatch & 1; + + s->block_last_index[n] = i; + return 0; +} + +static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, int16_t *block, int n) +{ + int level, dc, diff, j, run; + int component; + RLTable *rl; + uint8_t * scantable = s->intra_scantable.permutated; + const uint16_t *quant_matrix; + const int qscale = s->qscale; + + /* DC coefficient */ + if (n < 4) { + quant_matrix = s->intra_matrix; + component = 0; + } else { + quant_matrix = s->chroma_intra_matrix; + component = (n & 1) + 1; + } + diff = decode_dc(&s->gb, component); + if (diff >= 0xffff) + return -1; + dc = s->last_dc[component]; + dc += diff; + s->last_dc[component] = dc; + block[0] = dc << (3 - s->intra_dc_precision); + if (s->intra_vlc_format) + rl = &ff_rl_mpeg2; + else + rl = &ff_rl_mpeg1; + + { + OPEN_READER(re, &s->gb); + /* now quantify & encode AC coefficients */ + for (;;) { + UPDATE_CACHE(re, &s->gb); + GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); + + if (level == 127) { + break; + } else if (level != 0) { + scantable += run; + j = *scantable; + level = (level * qscale * quant_matrix[j]) >> 4; + level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); + LAST_SKIP_BITS(re, &s->gb, 1); + } else { + /* escape */ + run = SHOW_UBITS(re, &s->gb, 6) + 1; LAST_SKIP_BITS(re, &s->gb, 6); + UPDATE_CACHE(re, &s->gb); + level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); + scantable += run; + j = *scantable; + if (level < 0) { + level = (-level * qscale * quant_matrix[j]) >> 4; + level = -level; + } else { + level = (level * qscale * quant_matrix[j]) >> 4; + } + } + + block[j] = level; + } + CLOSE_READER(re, &s->gb); + } + + s->block_last_index[n] = scantable - s->intra_scantable.permutated; + return 0; +} + +/******************************************/ +/* decoding */ + +static inline int get_dmv(MpegEncContext *s) +{ + if (get_bits1(&s->gb)) + return 1 - (get_bits1(&s->gb) << 1); + else + return 0; +} + +static inline int get_qscale(MpegEncContext *s) +{ + int qscale = get_bits(&s->gb, 5); + if (s->q_scale_type) { + return non_linear_qscale[qscale]; + } else { + return qscale << 1; + } +} + +static void exchange_uv(MpegEncContext *s) +{ + int16_t (*tmp)[64]; + + tmp = s->pblocks[4]; + s->pblocks[4] = s->pblocks[5]; + s->pblocks[5] = tmp; +} + +/* motion type (for MPEG-2) */ +#define MT_FIELD 1 +#define MT_FRAME 2 +#define MT_16X8 2 +#define MT_DMV 3 + +static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64]) +{ + int i, j, k, cbp, val, mb_type, motion_type; + const int mb_block_count = 4 + (1 << s->chroma_format); + + av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y); + + assert(s->mb_skipped == 0); + + if (s->mb_skip_run-- != 0) { + if (s->pict_type == AV_PICTURE_TYPE_P) { + s->mb_skipped = 1; + s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; + } else { + int mb_type; + + if (s->mb_x) + mb_type = s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1]; + else + mb_type = s->current_picture.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1]; // FIXME not sure if this is allowed in MPEG at all + if (IS_INTRA(mb_type)) + return -1; + s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride] = + mb_type | MB_TYPE_SKIP; +// assert(s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1] & (MB_TYPE_16x16 | MB_TYPE_16x8)); + + if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0) + s->mb_skipped = 1; + } + + return 0; + } + + switch (s->pict_type) { + default: + case AV_PICTURE_TYPE_I: + if (get_bits1(&s->gb) == 0) { + if (get_bits1(&s->gb) == 0) { + av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA; + } else { + mb_type = MB_TYPE_INTRA; + } + break; + case AV_PICTURE_TYPE_P: + mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1); + if (mb_type < 0) { + av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + mb_type = ptype2mb_type[mb_type]; + break; + case AV_PICTURE_TYPE_B: + mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1); + if (mb_type < 0) { + av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + mb_type = btype2mb_type[mb_type]; + break; + } + av_dlog(s->avctx, "mb_type=%x\n", mb_type); +// motion_type = 0; /* avoid warning */ + if (IS_INTRA(mb_type)) { + s->dsp.clear_blocks(s->block[0]); + + if (!s->chroma_y_shift) { + s->dsp.clear_blocks(s->block[6]); + } + + /* compute DCT type */ + if (s->picture_structure == PICT_FRAME && // FIXME add an interlaced_dct coded var? + !s->frame_pred_frame_dct) { + s->interlaced_dct = get_bits1(&s->gb); + } + + if (IS_QUANT(mb_type)) + s->qscale = get_qscale(s); + + if (s->concealment_motion_vectors) { + /* just parse them */ + if (s->picture_structure != PICT_FRAME) + skip_bits1(&s->gb); /* field select */ + + s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] = + mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]); + s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] = + mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]); + + skip_bits1(&s->gb); /* marker */ + } else + memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */ + s->mb_intra = 1; + // if 1, we memcpy blocks in xvmcvideo + if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) { + ff_xvmc_pack_pblocks(s, -1); // inter are always full blocks + if (s->swap_uv) { + exchange_uv(s); + } + } + + if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) { + if (s->flags2 & CODEC_FLAG2_FAST) { + for (i = 0; i < 6; i++) { + mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i); + } + } else { + for (i = 0; i < mb_block_count; i++) { + if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0) + return -1; + } + } + } else { + for (i = 0; i < 6; i++) { + if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0) + return -1; + } + } + } else { + if (mb_type & MB_TYPE_ZERO_MV) { + assert(mb_type & MB_TYPE_CBP); + + s->mv_dir = MV_DIR_FORWARD; + if (s->picture_structure == PICT_FRAME) { + if (!s->frame_pred_frame_dct) + s->interlaced_dct = get_bits1(&s->gb); + s->mv_type = MV_TYPE_16X16; + } else { + s->mv_type = MV_TYPE_FIELD; + mb_type |= MB_TYPE_INTERLACED; + s->field_select[0][0] = s->picture_structure - 1; + } + + if (IS_QUANT(mb_type)) + s->qscale = get_qscale(s); + + s->last_mv[0][0][0] = 0; + s->last_mv[0][0][1] = 0; + s->last_mv[0][1][0] = 0; + s->last_mv[0][1][1] = 0; + s->mv[0][0][0] = 0; + s->mv[0][0][1] = 0; + } else { + assert(mb_type & MB_TYPE_L0L1); + // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED + /* get additional motion vector type */ + if (s->frame_pred_frame_dct) + motion_type = MT_FRAME; + else { + motion_type = get_bits(&s->gb, 2); + if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type)) + s->interlaced_dct = get_bits1(&s->gb); + } + + if (IS_QUANT(mb_type)) + s->qscale = get_qscale(s); + + /* motion vectors */ + s->mv_dir = (mb_type >> 13) & 3; + av_dlog(s->avctx, "motion_type=%d\n", motion_type); + switch (motion_type) { + case MT_FRAME: /* or MT_16X8 */ + if (s->picture_structure == PICT_FRAME) { + mb_type |= MB_TYPE_16x16; + s->mv_type = MV_TYPE_16X16; + for (i = 0; i < 2; i++) { + if (USES_LIST(mb_type, i)) { + /* MT_FRAME */ + s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] = + mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]); + s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] = + mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]); + /* full_pel: only for MPEG-1 */ + if (s->full_pel[i]) { + s->mv[i][0][0] <<= 1; + s->mv[i][0][1] <<= 1; + } + } + } + } else { + mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; + s->mv_type = MV_TYPE_16X8; + for (i = 0; i < 2; i++) { + if (USES_LIST(mb_type, i)) { + /* MT_16X8 */ + for (j = 0; j < 2; j++) { + s->field_select[i][j] = get_bits1(&s->gb); + for (k = 0; k < 2; k++) { + val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], + s->last_mv[i][j][k]); + s->last_mv[i][j][k] = val; + s->mv[i][j][k] = val; + } + } + } + } + } + break; + case MT_FIELD: + s->mv_type = MV_TYPE_FIELD; + if (s->picture_structure == PICT_FRAME) { + mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; + for (i = 0; i < 2; i++) { + if (USES_LIST(mb_type, i)) { + for (j = 0; j < 2; j++) { + s->field_select[i][j] = get_bits1(&s->gb); + val = mpeg_decode_motion(s, s->mpeg_f_code[i][0], + s->last_mv[i][j][0]); + s->last_mv[i][j][0] = val; + s->mv[i][j][0] = val; + av_dlog(s->avctx, "fmx=%d\n", val); + val = mpeg_decode_motion(s, s->mpeg_f_code[i][1], + s->last_mv[i][j][1] >> 1); + s->last_mv[i][j][1] = val << 1; + s->mv[i][j][1] = val; + av_dlog(s->avctx, "fmy=%d\n", val); + } + } + } + } else { + mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; + for (i = 0; i < 2; i++) { + if (USES_LIST(mb_type, i)) { + s->field_select[i][0] = get_bits1(&s->gb); + for (k = 0; k < 2; k++) { + val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], + s->last_mv[i][0][k]); + s->last_mv[i][0][k] = val; + s->last_mv[i][1][k] = val; + s->mv[i][0][k] = val; + } + } + } + } + break; + case MT_DMV: + s->mv_type = MV_TYPE_DMV; + for (i = 0; i < 2; i++) { + if (USES_LIST(mb_type, i)) { + int dmx, dmy, mx, my, m; + const int my_shift = s->picture_structure == PICT_FRAME; + + mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0], + s->last_mv[i][0][0]); + s->last_mv[i][0][0] = mx; + s->last_mv[i][1][0] = mx; + dmx = get_dmv(s); + my = mpeg_decode_motion(s, s->mpeg_f_code[i][1], + s->last_mv[i][0][1] >> my_shift); + dmy = get_dmv(s); + + + s->last_mv[i][0][1] = my << my_shift; + s->last_mv[i][1][1] = my << my_shift; + + s->mv[i][0][0] = mx; + s->mv[i][0][1] = my; + s->mv[i][1][0] = mx; // not used + s->mv[i][1][1] = my; // not used + + if (s->picture_structure == PICT_FRAME) { + mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; + + // m = 1 + 2 * s->top_field_first; + m = s->top_field_first ? 1 : 3; + + /* top -> top pred */ + s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx; + s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1; + m = 4 - m; + s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx; + s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1; + } else { + mb_type |= MB_TYPE_16x16; + + s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx; + s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy; + if (s->picture_structure == PICT_TOP_FIELD) + s->mv[i][2][1]--; + else + s->mv[i][2][1]++; + } + } + } + break; + default: + av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + } + + s->mb_intra = 0; + if (HAS_CBP(mb_type)) { + s->dsp.clear_blocks(s->block[0]); + + cbp = get_vlc2(&s->gb, ff_mb_pat_vlc.table, MB_PAT_VLC_BITS, 1); + if (mb_block_count > 6) { + cbp <<= mb_block_count - 6; + cbp |= get_bits(&s->gb, mb_block_count - 6); + s->dsp.clear_blocks(s->block[6]); + } + if (cbp <= 0) { + av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + + //if 1, we memcpy blocks in xvmcvideo + if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) { + ff_xvmc_pack_pblocks(s, cbp); + if (s->swap_uv) { + exchange_uv(s); + } + } + + if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) { + if (s->flags2 & CODEC_FLAG2_FAST) { + for (i = 0; i < 6; i++) { + if (cbp & 32) { + mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i); + } else { + s->block_last_index[i] = -1; + } + cbp += cbp; + } + } else { + cbp <<= 12-mb_block_count; + + for (i = 0; i < mb_block_count; i++) { + if (cbp & (1 << 11)) { + if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0) + return -1; + } else { + s->block_last_index[i] = -1; + } + cbp += cbp; + } + } + } else { + if (s->flags2 & CODEC_FLAG2_FAST) { + for (i = 0; i < 6; i++) { + if (cbp & 32) { + mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i); + } else { + s->block_last_index[i] = -1; + } + cbp += cbp; + } + } else { + for (i = 0; i < 6; i++) { + if (cbp & 32) { + if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0) + return -1; + } else { + s->block_last_index[i] = -1; + } + cbp += cbp; + } + } + } + } else { + for (i = 0; i < 12; i++) + s->block_last_index[i] = -1; + } + } + + s->current_picture.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type; + + return 0; +} + +static av_cold int mpeg_decode_init(AVCodecContext *avctx) +{ + Mpeg1Context *s = avctx->priv_data; + MpegEncContext *s2 = &s->mpeg_enc_ctx; + int i; + + /* we need some permutation to store matrices, + * until MPV_common_init() sets the real permutation. */ + for (i = 0; i < 64; i++) + s2->dsp.idct_permutation[i]=i; + + ff_MPV_decode_defaults(s2); + + s->mpeg_enc_ctx.avctx = avctx; + s->mpeg_enc_ctx.flags = avctx->flags; + s->mpeg_enc_ctx.flags2 = avctx->flags2; + ff_mpeg12_common_init(&s->mpeg_enc_ctx); + ff_mpeg12_init_vlcs(); + + s->mpeg_enc_ctx_allocated = 0; + s->mpeg_enc_ctx.picture_number = 0; + s->repeat_field = 0; + s->mpeg_enc_ctx.codec_id = avctx->codec->id; + avctx->color_range = AVCOL_RANGE_MPEG; + if (avctx->codec->id == AV_CODEC_ID_MPEG1VIDEO) + avctx->chroma_sample_location = AVCHROMA_LOC_CENTER; + else + avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; + return 0; +} + +static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from) +{ + Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data; + MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx; + int err; + + if (avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized) + return 0; + + err = ff_mpeg_update_thread_context(avctx, avctx_from); + if (err) return err; + + if (!ctx->mpeg_enc_ctx_allocated) + memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext)); + + if (!(s->pict_type == AV_PICTURE_TYPE_B || s->low_delay)) + s->picture_number++; + + return 0; +} + +static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm, + const uint8_t *new_perm) +{ + uint16_t temp_matrix[64]; + int i; + + memcpy(temp_matrix, matrix, 64 * sizeof(uint16_t)); + + for (i = 0; i < 64; i++) { + matrix[new_perm[i]] = temp_matrix[old_perm[i]]; + } +} + +static const enum AVPixelFormat pixfmt_xvmc_mpg2_420[] = { + AV_PIX_FMT_XVMC_MPEG2_IDCT, + AV_PIX_FMT_XVMC_MPEG2_MC, + AV_PIX_FMT_NONE }; + +static const enum AVPixelFormat mpeg12_hwaccel_pixfmt_list_420[] = { +#if CONFIG_MPEG2_DXVA2_HWACCEL + AV_PIX_FMT_DXVA2_VLD, +#endif +#if CONFIG_MPEG2_VAAPI_HWACCEL + AV_PIX_FMT_VAAPI_VLD, +#endif +#if CONFIG_MPEG1_VDPAU_HWACCEL | CONFIG_MPEG2_VDPAU_HWACCEL + AV_PIX_FMT_VDPAU, +#endif + AV_PIX_FMT_YUV420P, + AV_PIX_FMT_NONE +}; + +static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx) +{ + Mpeg1Context *s1 = avctx->priv_data; + MpegEncContext *s = &s1->mpeg_enc_ctx; + + if (avctx->xvmc_acceleration) + return avctx->get_format(avctx, pixfmt_xvmc_mpg2_420); + else if (avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) { + if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) + return AV_PIX_FMT_VDPAU_MPEG1; + else + return AV_PIX_FMT_VDPAU_MPEG2; + } else { + if (s->chroma_format < 2) + return avctx->get_format(avctx, mpeg12_hwaccel_pixfmt_list_420); + else if (s->chroma_format == 2) + return AV_PIX_FMT_YUV422P; + else + return AV_PIX_FMT_YUV444P; + } +} + +/* Call this function when we know all parameters. + * It may be called in different places for MPEG-1 and MPEG-2. */ +static int mpeg_decode_postinit(AVCodecContext *avctx) +{ + Mpeg1Context *s1 = avctx->priv_data; + MpegEncContext *s = &s1->mpeg_enc_ctx; + uint8_t old_permutation[64]; + + if ((s1->mpeg_enc_ctx_allocated == 0) || + avctx->coded_width != s->width || + avctx->coded_height != s->height || + s1->save_width != s->width || + s1->save_height != s->height || + s1->save_aspect_info != s->aspect_ratio_info || + s1->save_progressive_seq != s->progressive_sequence || + 0) + { + + if (s1->mpeg_enc_ctx_allocated) { + ParseContext pc = s->parse_context; + s->parse_context.buffer = 0; + ff_MPV_common_end(s); + s->parse_context = pc; + } + + if ((s->width == 0) || (s->height == 0)) + return -2; + + avcodec_set_dimensions(avctx, s->width, s->height); + avctx->bit_rate = s->bit_rate; + s1->save_aspect_info = s->aspect_ratio_info; + s1->save_width = s->width; + s1->save_height = s->height; + s1->save_progressive_seq = s->progressive_sequence; + + /* low_delay may be forced, in this case we will have B-frames + * that behave like P-frames. */ + avctx->has_b_frames = !s->low_delay; + + if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) { + //MPEG-1 fps + avctx->time_base.den = ff_mpeg12_frame_rate_tab[s->frame_rate_index].num; + avctx->time_base.num = ff_mpeg12_frame_rate_tab[s->frame_rate_index].den; + //MPEG-1 aspect + avctx->sample_aspect_ratio = av_d2q(1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255); + avctx->ticks_per_frame=1; + } else {//MPEG-2 + //MPEG-2 fps + av_reduce(&s->avctx->time_base.den, + &s->avctx->time_base.num, + ff_mpeg12_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2, + ff_mpeg12_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den, + 1 << 30); + avctx->ticks_per_frame = 2; + //MPEG-2 aspect + if (s->aspect_ratio_info > 1) { + AVRational dar = + av_mul_q(av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info], + (AVRational) {s1->pan_scan.width, s1->pan_scan.height}), + (AVRational) {s->width, s->height}); + + // we ignore the spec here and guess a bit as reality does not match the spec, see for example + // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg + // issue1613, 621, 562 + if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) || + (av_cmp_q(dar, (AVRational) {4, 3}) && av_cmp_q(dar, (AVRational) {16, 9}))) { + s->avctx->sample_aspect_ratio = + av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info], + (AVRational) {s->width, s->height}); + } else { + s->avctx->sample_aspect_ratio = + av_div_q(ff_mpeg2_aspect[s->aspect_ratio_info], + (AVRational) {s1->pan_scan.width, s1->pan_scan.height}); +//issue1613 4/3 16/9 -> 16/9 +//res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3 +//widescreen-issue562.mpg 4/3 16/9 -> 16/9 +// s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height}); + av_dlog(avctx, "A %d/%d\n", + ff_mpeg2_aspect[s->aspect_ratio_info].num, ff_mpeg2_aspect[s->aspect_ratio_info].den); + av_dlog(avctx, "B %d/%d\n", s->avctx->sample_aspect_ratio.num, + s->avctx->sample_aspect_ratio.den); + } + } else { + s->avctx->sample_aspect_ratio = + ff_mpeg2_aspect[s->aspect_ratio_info]; + } + } // MPEG-2 + + avctx->pix_fmt = mpeg_get_pixelformat(avctx); + avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt); + // until then pix_fmt may be changed right after codec init + if (avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT || + avctx->hwaccel || + s->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) + if (avctx->idct_algo == FF_IDCT_AUTO) + avctx->idct_algo = FF_IDCT_SIMPLE; + + /* Quantization matrices may need reordering + * if DCT permutation is changed. */ + memcpy(old_permutation, s->dsp.idct_permutation, 64 * sizeof(uint8_t)); + + if (ff_MPV_common_init(s) < 0) + return -2; + + quant_matrix_rebuild(s->intra_matrix, old_permutation, s->dsp.idct_permutation); + quant_matrix_rebuild(s->inter_matrix, old_permutation, s->dsp.idct_permutation); + quant_matrix_rebuild(s->chroma_intra_matrix, old_permutation, s->dsp.idct_permutation); + quant_matrix_rebuild(s->chroma_inter_matrix, old_permutation, s->dsp.idct_permutation); + + s1->mpeg_enc_ctx_allocated = 1; + } + return 0; +} + +static int mpeg1_decode_picture(AVCodecContext *avctx, + const uint8_t *buf, int buf_size) +{ + Mpeg1Context *s1 = avctx->priv_data; + MpegEncContext *s = &s1->mpeg_enc_ctx; + int ref, f_code, vbv_delay; + + init_get_bits(&s->gb, buf, buf_size*8); + + ref = get_bits(&s->gb, 10); /* temporal ref */ + s->pict_type = get_bits(&s->gb, 3); + if (s->pict_type == 0 || s->pict_type > 3) + return -1; + + vbv_delay = get_bits(&s->gb, 16); + if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) { + s->full_pel[0] = get_bits1(&s->gb); + f_code = get_bits(&s->gb, 3); + if (f_code == 0 && (avctx->err_recognition & AV_EF_BITSTREAM)) + return -1; + s->mpeg_f_code[0][0] = f_code; + s->mpeg_f_code[0][1] = f_code; + } + if (s->pict_type == AV_PICTURE_TYPE_B) { + s->full_pel[1] = get_bits1(&s->gb); + f_code = get_bits(&s->gb, 3); + if (f_code == 0 && (avctx->err_recognition & AV_EF_BITSTREAM)) + return -1; + s->mpeg_f_code[1][0] = f_code; + s->mpeg_f_code[1][1] = f_code; + } + s->current_picture.f.pict_type = s->pict_type; + s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I; + + if (avctx->debug & FF_DEBUG_PICT_INFO) + av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type); + + s->y_dc_scale = 8; + s->c_dc_scale = 8; + return 0; +} + +static void mpeg_decode_sequence_extension(Mpeg1Context *s1) +{ + MpegEncContext *s= &s1->mpeg_enc_ctx; + int horiz_size_ext, vert_size_ext; + int bit_rate_ext; + + skip_bits(&s->gb, 1); /* profile and level esc*/ + s->avctx->profile = get_bits(&s->gb, 3); + s->avctx->level = get_bits(&s->gb, 4); + s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */ + s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */ + horiz_size_ext = get_bits(&s->gb, 2); + vert_size_ext = get_bits(&s->gb, 2); + s->width |= (horiz_size_ext << 12); + s->height |= (vert_size_ext << 12); + bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */ + s->bit_rate += (bit_rate_ext << 18) * 400; + skip_bits1(&s->gb); /* marker */ + s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10; + + s->low_delay = get_bits1(&s->gb); + if (s->flags & CODEC_FLAG_LOW_DELAY) + s->low_delay = 1; + + s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1; + s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1; + + av_dlog(s->avctx, "sequence extension\n"); + s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO; + + if (s->avctx->debug & FF_DEBUG_PICT_INFO) + av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n", + s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate); + +} + +static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1) +{ + MpegEncContext *s = &s1->mpeg_enc_ctx; + int color_description, w, h; + + skip_bits(&s->gb, 3); /* video format */ + color_description = get_bits1(&s->gb); + if (color_description) { + s->avctx->color_primaries = get_bits(&s->gb, 8); + s->avctx->color_trc = get_bits(&s->gb, 8); + s->avctx->colorspace = get_bits(&s->gb, 8); + } + w = get_bits(&s->gb, 14); + skip_bits(&s->gb, 1); //marker + h = get_bits(&s->gb, 14); + // remaining 3 bits are zero padding + + s1->pan_scan.width = 16 * w; + s1->pan_scan.height = 16 * h; + + if (s->avctx->debug & FF_DEBUG_PICT_INFO) + av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h); +} + +static void mpeg_decode_picture_display_extension(Mpeg1Context *s1) +{ + MpegEncContext *s = &s1->mpeg_enc_ctx; + int i, nofco; + + nofco = 1; + if (s->progressive_sequence) { + if (s->repeat_first_field) { + nofco++; + if (s->top_field_first) + nofco++; + } + } else { + if (s->picture_structure == PICT_FRAME) { + nofco++; + if (s->repeat_first_field) + nofco++; + } + } + for (i = 0; i < nofco; i++) { + s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16); + skip_bits(&s->gb, 1); // marker + s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16); + skip_bits(&s->gb, 1); // marker + } + + if (s->avctx->debug & FF_DEBUG_PICT_INFO) + av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n", + s1->pan_scan.position[0][0], s1->pan_scan.position[0][1], + s1->pan_scan.position[1][0], s1->pan_scan.position[1][1], + s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]); +} + +static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra) +{ + int i; + + for (i = 0; i < 64; i++) { + int j = s->dsp.idct_permutation[ff_zigzag_direct[i]]; + int v = get_bits(&s->gb, 8); + if (v == 0) { + av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n"); + return -1; + } + if (intra && i == 0 && v != 8) { + av_log(s->avctx, AV_LOG_ERROR, "intra matrix invalid, ignoring\n"); + v = 8; // needed by pink.mpg / issue1046 + } + matrix0[j] = v; + if (matrix1) + matrix1[j] = v; + } + return 0; +} + +static void mpeg_decode_quant_matrix_extension(MpegEncContext *s) +{ + av_dlog(s->avctx, "matrix extension\n"); + + if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1); + if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0); + if (get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1); + if (get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0); +} + +static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1) +{ + MpegEncContext *s = &s1->mpeg_enc_ctx; + + s->full_pel[0] = s->full_pel[1] = 0; + s->mpeg_f_code[0][0] = get_bits(&s->gb, 4); + s->mpeg_f_code[0][1] = get_bits(&s->gb, 4); + s->mpeg_f_code[1][0] = get_bits(&s->gb, 4); + s->mpeg_f_code[1][1] = get_bits(&s->gb, 4); + if (!s->pict_type && s1->mpeg_enc_ctx_allocated) { + av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n"); + if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) { + if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15) + s->pict_type = AV_PICTURE_TYPE_I; + else + s->pict_type = AV_PICTURE_TYPE_P; + } else + s->pict_type = AV_PICTURE_TYPE_B; + s->current_picture.f.pict_type = s->pict_type; + s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I; + } + s->intra_dc_precision = get_bits(&s->gb, 2); + s->picture_structure = get_bits(&s->gb, 2); + s->top_field_first = get_bits1(&s->gb); + s->frame_pred_frame_dct = get_bits1(&s->gb); + s->concealment_motion_vectors = get_bits1(&s->gb); + s->q_scale_type = get_bits1(&s->gb); + s->intra_vlc_format = get_bits1(&s->gb); + s->alternate_scan = get_bits1(&s->gb); + s->repeat_first_field = get_bits1(&s->gb); + s->chroma_420_type = get_bits1(&s->gb); + s->progressive_frame = get_bits1(&s->gb); + + if (s->progressive_sequence && !s->progressive_frame) { + s->progressive_frame = 1; + av_log(s->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n"); + } + + if (s->picture_structure == 0 || (s->progressive_frame && s->picture_structure != PICT_FRAME)) { + av_log(s->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s->picture_structure); + s->picture_structure = PICT_FRAME; + } + + if (s->progressive_sequence && !s->frame_pred_frame_dct) { + av_log(s->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n"); + } + + if (s->picture_structure == PICT_FRAME) { + s->first_field = 0; + s->v_edge_pos = 16 * s->mb_height; + } else { + s->first_field ^= 1; + s->v_edge_pos = 8 * s->mb_height; + memset(s->mbskip_table, 0, s->mb_stride * s->mb_height); + } + + if (s->alternate_scan) { + ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan); + ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan); + } else { + ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct); + ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct); + } + + /* composite display not parsed */ + av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision); + av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure); + av_dlog(s->avctx, "top field first=%d\n", s->top_field_first); + av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field); + av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors); + av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format); + av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan); + av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct); + av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame); +} + +static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size) +{ + AVCodecContext *avctx = s->avctx; + Mpeg1Context *s1 = (Mpeg1Context*)s; + + /* start frame decoding */ + if (s->first_field || s->picture_structure == PICT_FRAME) { + AVFrameSideData *pan_scan; + + if (ff_MPV_frame_start(s, avctx) < 0) + return -1; + + ff_mpeg_er_frame_start(s); + + /* first check if we must repeat the frame */ + s->current_picture_ptr->f.repeat_pict = 0; + if (s->repeat_first_field) { + if (s->progressive_sequence) { + if (s->top_field_first) + s->current_picture_ptr->f.repeat_pict = 4; + else + s->current_picture_ptr->f.repeat_pict = 2; + } else if (s->progressive_frame) { + s->current_picture_ptr->f.repeat_pict = 1; + } + } + + pan_scan = av_frame_new_side_data(&s->current_picture_ptr->f, + AV_FRAME_DATA_PANSCAN, + sizeof(s1->pan_scan)); + if (!pan_scan) + return AVERROR(ENOMEM); + memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan)); + + if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME)) + ff_thread_finish_setup(avctx); + } else { // second field + int i; + + if (!s->current_picture_ptr) { + av_log(s->avctx, AV_LOG_ERROR, "first field missing\n"); + return -1; + } + + if (s->avctx->hwaccel && + (s->avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) { + if (s->avctx->hwaccel->end_frame(s->avctx) < 0) + av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode first field\n"); + } + + for (i = 0; i < 4; i++) { + s->current_picture.f.data[i] = s->current_picture_ptr->f.data[i]; + if (s->picture_structure == PICT_BOTTOM_FIELD) { + s->current_picture.f.data[i] += s->current_picture_ptr->f.linesize[i]; + } + } + } + + if (avctx->hwaccel) { + if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0) + return -1; + } + +// MPV_frame_start will call this function too, +// but we need to call it on every field + if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration) + if (ff_xvmc_field_start(s, avctx) < 0) + return -1; + + return 0; +} + +#define DECODE_SLICE_ERROR -1 +#define DECODE_SLICE_OK 0 + +/** + * Decode a slice. + * MpegEncContext.mb_y must be set to the MB row from the startcode. + * @return DECODE_SLICE_ERROR if the slice is damaged, + * DECODE_SLICE_OK if this slice is OK + */ +static int mpeg_decode_slice(MpegEncContext *s, int mb_y, + const uint8_t **buf, int buf_size) +{ + AVCodecContext *avctx = s->avctx; + const int field_pic = s->picture_structure != PICT_FRAME; + + s->resync_mb_x = + s->resync_mb_y = -1; + + assert(mb_y < s->mb_height); + + init_get_bits(&s->gb, *buf, buf_size * 8); + + ff_mpeg1_clean_buffers(s); + s->interlaced_dct = 0; + + s->qscale = get_qscale(s); + + if (s->qscale == 0) { + av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n"); + return -1; + } + + /* extra slice info */ + while (get_bits1(&s->gb) != 0) { + skip_bits(&s->gb, 8); + } + + s->mb_x = 0; + + if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) { + skip_bits1(&s->gb); + } else { + while (get_bits_left(&s->gb) > 0) { + int code = get_vlc2(&s->gb, ff_mbincr_vlc.table, + MBINCR_VLC_BITS, 2); + if (code < 0) { + av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n"); + return -1; + } + if (code >= 33) { + if (code == 33) { + s->mb_x += 33; + } + /* otherwise, stuffing, nothing to do */ + } else { + s->mb_x += code; + break; + } + } + } + + if (s->mb_x >= (unsigned)s->mb_width) { + av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n"); + return -1; + } + + if (avctx->hwaccel) { + const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */ + int start_code = -1; + buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code); + if (buf_end < *buf + buf_size) + buf_end -= 4; + s->mb_y = mb_y; + if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0) + return DECODE_SLICE_ERROR; + *buf = buf_end; + return DECODE_SLICE_OK; + } + + s->resync_mb_x = s->mb_x; + s->resync_mb_y = s->mb_y = mb_y; + s->mb_skip_run = 0; + ff_init_block_index(s); + + if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) { + if (s->avctx->debug & FF_DEBUG_PICT_INFO) { + av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%2d%2d%2d%2d %s %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n", + s->qscale, s->mpeg_f_code[0][0], s->mpeg_f_code[0][1], s->mpeg_f_code[1][0], s->mpeg_f_code[1][1], + s->pict_type == AV_PICTURE_TYPE_I ? "I" : (s->pict_type == AV_PICTURE_TYPE_P ? "P" : (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")), + s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"", + s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors, + s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :""); + } + } + + for (;;) { + // If 1, we memcpy blocks in xvmcvideo. + if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) + ff_xvmc_init_block(s); // set s->block + + if (mpeg_decode_mb(s, s->block) < 0) + return -1; + + if (s->current_picture.motion_val[0] && !s->encoding) { // note motion_val is normally NULL unless we want to extract the MVs + const int wrap = s->b8_stride; + int xy = s->mb_x * 2 + s->mb_y * 2 * wrap; + int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride); + int motion_x, motion_y, dir, i; + + for (i = 0; i < 2; i++) { + for (dir = 0; dir < 2; dir++) { + if (s->mb_intra || (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) { + motion_x = motion_y = 0; + } else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)) { + motion_x = s->mv[dir][0][0]; + motion_y = s->mv[dir][0][1]; + } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ { + motion_x = s->mv[dir][i][0]; + motion_y = s->mv[dir][i][1]; + } + + s->current_picture.motion_val[dir][xy ][0] = motion_x; + s->current_picture.motion_val[dir][xy ][1] = motion_y; + s->current_picture.motion_val[dir][xy + 1][0] = motion_x; + s->current_picture.motion_val[dir][xy + 1][1] = motion_y; + s->current_picture.ref_index [dir][b8_xy ] = + s->current_picture.ref_index [dir][b8_xy + 1] = s->field_select[dir][i]; + assert(s->field_select[dir][i] == 0 || s->field_select[dir][i] == 1); + } + xy += wrap; + b8_xy +=2; + } + } + + s->dest[0] += 16; + s->dest[1] += 16 >> s->chroma_x_shift; + s->dest[2] += 16 >> s->chroma_x_shift; + + ff_MPV_decode_mb(s, s->block); + + if (++s->mb_x >= s->mb_width) { + const int mb_size = 16; + + ff_mpeg_draw_horiz_band(s, mb_size*(s->mb_y >> field_pic), mb_size); + ff_MPV_report_decode_progress(s); + + s->mb_x = 0; + s->mb_y += 1 << field_pic; + + if (s->mb_y >= s->mb_height) { + int left = get_bits_left(&s->gb); + int is_d10 = s->chroma_format == 2 && s->pict_type == AV_PICTURE_TYPE_I && avctx->profile == 0 && avctx->level == 5 + && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0 + && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/; + + if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) + || ((avctx->err_recognition & AV_EF_BUFFER) && left > 8)) { + av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23))); + return -1; + } else + goto eos; + } + + ff_init_block_index(s); + } + + /* skip mb handling */ + if (s->mb_skip_run == -1) { + /* read increment again */ + s->mb_skip_run = 0; + for (;;) { + int code = get_vlc2(&s->gb, ff_mbincr_vlc.table, + MBINCR_VLC_BITS, 2); + if (code < 0) { + av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n"); + return -1; + } + if (code >= 33) { + if (code == 33) { + s->mb_skip_run += 33; + } else if (code == 35) { + if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) { + av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n"); + return -1; + } + goto eos; /* end of slice */ + } + /* otherwise, stuffing, nothing to do */ + } else { + s->mb_skip_run += code; + break; + } + } + if (s->mb_skip_run) { + int i; + if (s->pict_type == AV_PICTURE_TYPE_I) { + av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + + /* skip mb */ + s->mb_intra = 0; + for (i = 0; i < 12; i++) + s->block_last_index[i] = -1; + if (s->picture_structure == PICT_FRAME) + s->mv_type = MV_TYPE_16X16; + else + s->mv_type = MV_TYPE_FIELD; + if (s->pict_type == AV_PICTURE_TYPE_P) { + /* if P type, zero motion vector is implied */ + s->mv_dir = MV_DIR_FORWARD; + s->mv[0][0][0] = s->mv[0][0][1] = 0; + s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0; + s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0; + s->field_select[0][0] = (s->picture_structure - 1) & 1; + } else { + /* if B type, reuse previous vectors and directions */ + s->mv[0][0][0] = s->last_mv[0][0][0]; + s->mv[0][0][1] = s->last_mv[0][0][1]; + s->mv[1][0][0] = s->last_mv[1][0][0]; + s->mv[1][0][1] = s->last_mv[1][0][1]; + } + } + } + } +eos: // end of slice + *buf += (get_bits_count(&s->gb)-1)/8; + av_dlog(s, "y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y); + return 0; +} + +static int slice_decode_thread(AVCodecContext *c, void *arg) +{ + MpegEncContext *s = *(void**)arg; + const uint8_t *buf = s->gb.buffer; + int mb_y = s->start_mb_y; + const int field_pic = s->picture_structure != PICT_FRAME; + + s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic; + + for (;;) { + uint32_t start_code; + int ret; + + ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf); + emms_c(); + av_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n", + ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, + s->start_mb_y, s->end_mb_y, s->er.error_count); + if (ret < 0) { + if (c->err_recognition & AV_EF_EXPLODE) + return ret; + if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0) + ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR); + } else { + ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_AC_END | ER_DC_END | ER_MV_END); + } + + if (s->mb_y == s->end_mb_y) + return 0; + + start_code = -1; + buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code); + mb_y= (start_code - SLICE_MIN_START_CODE) << field_pic; + if (s->picture_structure == PICT_BOTTOM_FIELD) + mb_y++; + if (mb_y < 0 || mb_y >= s->end_mb_y) + return -1; + } +} + +/** + * Handle slice ends. + * @return 1 if it seems to be the last slice + */ +static int slice_end(AVCodecContext *avctx, AVFrame *pict) +{ + Mpeg1Context *s1 = avctx->priv_data; + MpegEncContext *s = &s1->mpeg_enc_ctx; + + if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr) + return 0; + + if (s->avctx->hwaccel) { + if (s->avctx->hwaccel->end_frame(s->avctx) < 0) + av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n"); + } + + if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration) + ff_xvmc_field_end(s); + + /* end of slice reached */ + if (/*s->mb_y << field_pic == s->mb_height &&*/ !s->first_field) { + /* end of image */ + + ff_er_frame_end(&s->er); + + ff_MPV_frame_end(s); + + if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) { + int ret = av_frame_ref(pict, &s->current_picture_ptr->f); + if (ret < 0) + return ret; + ff_print_debug_info(s, s->current_picture_ptr); + } else { + if (avctx->active_thread_type & FF_THREAD_FRAME) + s->picture_number++; + /* latency of 1 frame for I- and P-frames */ + /* XXX: use another variable than picture_number */ + if (s->last_picture_ptr != NULL) { + int ret = av_frame_ref(pict, &s->last_picture_ptr->f); + if (ret < 0) + return ret; + ff_print_debug_info(s, s->last_picture_ptr); + } + } + + return 1; + } else { + return 0; + } +} + +static int mpeg1_decode_sequence(AVCodecContext *avctx, + const uint8_t *buf, int buf_size) +{ + Mpeg1Context *s1 = avctx->priv_data; + MpegEncContext *s = &s1->mpeg_enc_ctx; + int width, height; + int i, v, j; + + init_get_bits(&s->gb, buf, buf_size*8); + + width = get_bits(&s->gb, 12); + height = get_bits(&s->gb, 12); + if (width == 0 || height == 0) { + av_log(avctx, AV_LOG_WARNING, "Invalid horizontal or vertical size " + "value.\n"); + if (avctx->err_recognition & AV_EF_BITSTREAM) + return AVERROR_INVALIDDATA; + } + s->aspect_ratio_info = get_bits(&s->gb, 4); + if (s->aspect_ratio_info == 0) { + av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n"); + if (avctx->err_recognition & AV_EF_BITSTREAM) + return -1; + } + s->frame_rate_index = get_bits(&s->gb, 4); + if (s->frame_rate_index == 0 || s->frame_rate_index > 13) + return -1; + s->bit_rate = get_bits(&s->gb, 18) * 400; + if (get_bits1(&s->gb) == 0) /* marker */ + return -1; + s->width = width; + s->height = height; + + s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16; + skip_bits(&s->gb, 1); + + /* get matrix */ + if (get_bits1(&s->gb)) { + load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1); + } else { + for (i = 0; i < 64; i++) { + j = s->dsp.idct_permutation[i]; + v = ff_mpeg1_default_intra_matrix[i]; + s->intra_matrix[j] = v; + s->chroma_intra_matrix[j] = v; + } + } + if (get_bits1(&s->gb)) { + load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0); + } else { + for (i = 0; i < 64; i++) { + int j = s->dsp.idct_permutation[i]; + v = ff_mpeg1_default_non_intra_matrix[i]; + s->inter_matrix[j] = v; + s->chroma_inter_matrix[j] = v; + } + } + + if (show_bits(&s->gb, 23) != 0) { + av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n"); + return -1; + } + + /* we set MPEG-2 parameters so that it emulates MPEG-1 */ + s->progressive_sequence = 1; + s->progressive_frame = 1; + s->picture_structure = PICT_FRAME; + s->frame_pred_frame_dct = 1; + s->chroma_format = 1; + s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO; + s->out_format = FMT_MPEG1; + s->swap_uv = 0; // AFAIK VCR2 does not have SEQ_HEADER + if (s->flags & CODEC_FLAG_LOW_DELAY) + s->low_delay = 1; + + if (s->avctx->debug & FF_DEBUG_PICT_INFO) + av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n", + s->avctx->rc_buffer_size, s->bit_rate); + + return 0; +} + +static int vcr2_init_sequence(AVCodecContext *avctx) +{ + Mpeg1Context *s1 = avctx->priv_data; + MpegEncContext *s = &s1->mpeg_enc_ctx; + int i, v; + + /* start new MPEG-1 context decoding */ + s->out_format = FMT_MPEG1; + if (s1->mpeg_enc_ctx_allocated) { + ff_MPV_common_end(s); + } + s->width = avctx->coded_width; + s->height = avctx->coded_height; + avctx->has_b_frames = 0; // true? + s->low_delay = 1; + + avctx->pix_fmt = mpeg_get_pixelformat(avctx); + avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt); + + if (avctx->pix_fmt == AV_PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel || + s->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) + if (avctx->idct_algo == FF_IDCT_AUTO) + avctx->idct_algo = FF_IDCT_SIMPLE; + + if (ff_MPV_common_init(s) < 0) + return -1; + exchange_uv(s); // common init reset pblocks, so we swap them here + s->swap_uv = 1; // in case of xvmc we need to swap uv for each MB + s1->mpeg_enc_ctx_allocated = 1; + + for (i = 0; i < 64; i++) { + int j = s->dsp.idct_permutation[i]; + v = ff_mpeg1_default_intra_matrix[i]; + s->intra_matrix[j] = v; + s->chroma_intra_matrix[j] = v; + + v = ff_mpeg1_default_non_intra_matrix[i]; + s->inter_matrix[j] = v; + s->chroma_inter_matrix[j] = v; + } + + s->progressive_sequence = 1; + s->progressive_frame = 1; + s->picture_structure = PICT_FRAME; + s->frame_pred_frame_dct = 1; + s->chroma_format = 1; + s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO; + s1->save_width = s->width; + s1->save_height = s->height; + s1->save_progressive_seq = s->progressive_sequence; + return 0; +} + + +static void mpeg_decode_user_data(AVCodecContext *avctx, + const uint8_t *p, int buf_size) +{ + const uint8_t *buf_end = p + buf_size; + + /* we parse the DTG active format information */ + if (buf_end - p >= 5 && + p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') { + int flags = p[4]; + p += 5; + if (flags & 0x80) { + /* skip event id */ + p += 2; + } + if (flags & 0x40) { + if (buf_end - p < 1) + return; + avctx->dtg_active_format = p[0] & 0x0f; + } + } +} + +static void mpeg_decode_gop(AVCodecContext *avctx, + const uint8_t *buf, int buf_size) +{ + Mpeg1Context *s1 = avctx->priv_data; + MpegEncContext *s = &s1->mpeg_enc_ctx; + + int time_code_hours, time_code_minutes; + int time_code_seconds, time_code_pictures; + int broken_link; + + init_get_bits(&s->gb, buf, buf_size*8); + + skip_bits1(&s->gb); /* drop_frame_flag */ + + time_code_hours = get_bits(&s->gb, 5); + time_code_minutes = get_bits(&s->gb, 6); + skip_bits1(&s->gb); // marker bit + time_code_seconds = get_bits(&s->gb, 6); + time_code_pictures = get_bits(&s->gb, 6); + + s1->closed_gop = get_bits1(&s->gb); + /*broken_link indicate that after editing the + reference frames of the first B-Frames after GOP I-Frame + are missing (open gop)*/ + broken_link = get_bits1(&s->gb); + + if (s->avctx->debug & FF_DEBUG_PICT_INFO) + av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) closed_gop=%d broken_link=%d\n", + time_code_hours, time_code_minutes, time_code_seconds, + time_code_pictures, s1->closed_gop, broken_link); +} + +static int decode_chunks(AVCodecContext *avctx, + AVFrame *picture, int *got_output, + const uint8_t *buf, int buf_size) +{ + Mpeg1Context *s = avctx->priv_data; + MpegEncContext *s2 = &s->mpeg_enc_ctx; + const uint8_t *buf_ptr = buf; + const uint8_t *buf_end = buf + buf_size; + int ret, input_size; + int last_code = 0; + + for (;;) { + /* find next start code */ + uint32_t start_code = -1; + buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code); + if (start_code > 0x1ff) { + if (s2->pict_type != AV_PICTURE_TYPE_B || avctx->skip_frame <= AVDISCARD_DEFAULT) { + if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) { + int i; + + avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*)); + for (i = 0; i < s->slice_count; i++) + s2->er.error_count += s2->thread_context[i]->er.error_count; + } + + if ((CONFIG_MPEG_VDPAU_DECODER || CONFIG_MPEG1_VDPAU_DECODER) + && avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) + ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count); + + ret = slice_end(avctx, picture); + if (ret < 0) + return ret; + else if (ret) { + if (s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice + *got_output = 1; + } + } + s2->pict_type = 0; + return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index); + } + + input_size = buf_end - buf_ptr; + + if (avctx->debug & FF_DEBUG_STARTCODE) { + av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size); + } + + /* prepare data for next start code */ + switch (start_code) { + case SEQ_START_CODE: + if (last_code == 0) { + mpeg1_decode_sequence(avctx, buf_ptr, input_size); + s->sync=1; + } else { + av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code); + if (avctx->err_recognition & AV_EF_EXPLODE) + return AVERROR_INVALIDDATA; + } + break; + + case PICTURE_START_CODE: + if (s2->width <= 0 || s2->height <= 0) { + av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n", + s2->width, s2->height); + return AVERROR_INVALIDDATA; + } + + if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) && s->slice_count) { + int i; + + avctx->execute(avctx, slice_decode_thread, + s2->thread_context, NULL, + s->slice_count, sizeof(void*)); + for (i = 0; i < s->slice_count; i++) + s2->er.error_count += s2->thread_context[i]->er.error_count; + s->slice_count = 0; + } + if (last_code == 0 || last_code == SLICE_MIN_START_CODE) { + ret = mpeg_decode_postinit(avctx); + if (ret < 0) { + av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n"); + return ret; + } + + /* we have a complete image: we try to decompress it */ + if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0) + s2->pict_type = 0; + s2->first_slice = 1; + last_code = PICTURE_START_CODE; + } else { + av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code); + if (avctx->err_recognition & AV_EF_EXPLODE) + return AVERROR_INVALIDDATA; + } + break; + case EXT_START_CODE: + init_get_bits(&s2->gb, buf_ptr, input_size*8); + + switch (get_bits(&s2->gb, 4)) { + case 0x1: + if (last_code == 0) { + mpeg_decode_sequence_extension(s); + } else { + av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code); + if (avctx->err_recognition & AV_EF_EXPLODE) + return AVERROR_INVALIDDATA; + } + break; + case 0x2: + mpeg_decode_sequence_display_extension(s); + break; + case 0x3: + mpeg_decode_quant_matrix_extension(s2); + break; + case 0x7: + mpeg_decode_picture_display_extension(s); + break; + case 0x8: + if (last_code == PICTURE_START_CODE) { + mpeg_decode_picture_coding_extension(s); + } else { + av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code); + if (avctx->err_recognition & AV_EF_EXPLODE) + return AVERROR_INVALIDDATA; + } + break; + } + break; + case USER_START_CODE: + mpeg_decode_user_data(avctx, buf_ptr, input_size); + break; + case GOP_START_CODE: + if (last_code == 0) { + s2->first_field=0; + mpeg_decode_gop(avctx, buf_ptr, input_size); + s->sync=1; + } else { + av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code); + if (avctx->err_recognition & AV_EF_EXPLODE) + return AVERROR_INVALIDDATA; + } + break; + default: + if (start_code >= SLICE_MIN_START_CODE && + start_code <= SLICE_MAX_START_CODE && last_code != 0) { + const int field_pic = s2->picture_structure != PICT_FRAME; + int mb_y = (start_code - SLICE_MIN_START_CODE) << field_pic; + last_code = SLICE_MIN_START_CODE; + + if (s2->picture_structure == PICT_BOTTOM_FIELD) + mb_y++; + + if (mb_y >= s2->mb_height) { + av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height); + return -1; + } + + if (s2->last_picture_ptr == NULL) { + /* Skip B-frames if we do not have reference frames and gop is not closed */ + if (s2->pict_type == AV_PICTURE_TYPE_B) { + if (!s->closed_gop) + break; + } + } + if (s2->pict_type == AV_PICTURE_TYPE_I) + s->sync=1; + if (s2->next_picture_ptr == NULL) { + /* Skip P-frames if we do not have a reference frame or we have an invalid header. */ + if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) break; + } + if ((avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type == AV_PICTURE_TYPE_B) || + (avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type != AV_PICTURE_TYPE_I) || + avctx->skip_frame >= AVDISCARD_ALL) + break; + + if (!s->mpeg_enc_ctx_allocated) + break; + + if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) { + if (mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom) + break; + } + + if (!s2->pict_type) { + av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n"); + if (avctx->err_recognition & AV_EF_EXPLODE) + return AVERROR_INVALIDDATA; + break; + } + + if (s2->first_slice) { + s2->first_slice = 0; + if (mpeg_field_start(s2, buf, buf_size) < 0) + return -1; + } + if (!s2->current_picture_ptr) { + av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n"); + return AVERROR_INVALIDDATA; + } + + if (avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) { + s->slice_count++; + break; + } + + if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE)) { + int threshold = (s2->mb_height * s->slice_count + + s2->slice_context_count / 2) / + s2->slice_context_count; + if (threshold <= mb_y) { + MpegEncContext *thread_context = s2->thread_context[s->slice_count]; + + thread_context->start_mb_y = mb_y; + thread_context->end_mb_y = s2->mb_height; + if (s->slice_count) { + s2->thread_context[s->slice_count-1]->end_mb_y = mb_y; + ret = ff_update_duplicate_context(thread_context, + s2); + if (ret < 0) + return ret; + } + init_get_bits(&thread_context->gb, buf_ptr, input_size*8); + s->slice_count++; + } + buf_ptr += 2; // FIXME add minimum number of bytes per slice + } else { + ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size); + emms_c(); + + if (ret < 0) { + if (avctx->err_recognition & AV_EF_EXPLODE) + return ret; + if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0) + ff_er_add_slice(&s2->er, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x, s2->mb_y, ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR); + } else { + ff_er_add_slice(&s2->er, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, ER_AC_END | ER_DC_END | ER_MV_END); + } + } + } + break; + } + } +} + +static int mpeg_decode_frame(AVCodecContext *avctx, + void *data, int *got_output, + AVPacket *avpkt) +{ + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + Mpeg1Context *s = avctx->priv_data; + AVFrame *picture = data; + MpegEncContext *s2 = &s->mpeg_enc_ctx; + av_dlog(avctx, "fill_buffer\n"); + + if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) { + /* special case for last picture */ + if (s2->low_delay == 0 && s2->next_picture_ptr) { + int ret = av_frame_ref(picture, &s2->next_picture_ptr->f); + if (ret < 0) + return ret; + + s2->next_picture_ptr = NULL; + + *got_output = 1; + } + return buf_size; + } + + if (s2->flags & CODEC_FLAG_TRUNCATED) { + int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL); + + if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0) + return buf_size; + } + + if (s->mpeg_enc_ctx_allocated == 0 && avctx->codec_tag == AV_RL32("VCR2")) + vcr2_init_sequence(avctx); + + s->slice_count = 0; + + if (avctx->extradata && !s->extradata_decoded) { + int ret = decode_chunks(avctx, picture, got_output, avctx->extradata, avctx->extradata_size); + s->extradata_decoded = 1; + if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) + return ret; + } + + return decode_chunks(avctx, picture, got_output, buf, buf_size); +} + + +static void flush(AVCodecContext *avctx) +{ + Mpeg1Context *s = avctx->priv_data; + + s->sync=0; + s->closed_gop = 0; + + ff_mpeg_flush(avctx); +} + +static int mpeg_decode_end(AVCodecContext *avctx) +{ + Mpeg1Context *s = avctx->priv_data; + + if (s->mpeg_enc_ctx_allocated) + ff_MPV_common_end(&s->mpeg_enc_ctx); + return 0; +} + +static const AVProfile mpeg2_video_profiles[] = { + { FF_PROFILE_MPEG2_422, "4:2:2" }, + { FF_PROFILE_MPEG2_HIGH, "High" }, + { FF_PROFILE_MPEG2_SS, "Spatially Scalable" }, + { FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" }, + { FF_PROFILE_MPEG2_MAIN, "Main" }, + { FF_PROFILE_MPEG2_SIMPLE, "Simple" }, + { FF_PROFILE_RESERVED, "Reserved" }, + { FF_PROFILE_RESERVED, "Reserved" }, + { FF_PROFILE_UNKNOWN }, +}; + + +AVCodec ff_mpeg1video_decoder = { + .name = "mpeg1video", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_MPEG1VIDEO, + .priv_data_size = sizeof(Mpeg1Context), + .init = mpeg_decode_init, + .close = mpeg_decode_end, + .decode = mpeg_decode_frame, + .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | + CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | + CODEC_CAP_SLICE_THREADS, + .flush = flush, + .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"), + .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context) +}; + +AVCodec ff_mpeg2video_decoder = { + .name = "mpeg2video", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_MPEG2VIDEO, + .priv_data_size = sizeof(Mpeg1Context), + .init = mpeg_decode_init, + .close = mpeg_decode_end, + .decode = mpeg_decode_frame, + .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | + CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | + CODEC_CAP_SLICE_THREADS, + .flush = flush, + .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"), + .profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles), +}; + +#if CONFIG_MPEG_XVMC_DECODER +static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx) +{ + if (avctx->active_thread_type & FF_THREAD_SLICE) + return -1; + if (!(avctx->slice_flags & SLICE_FLAG_CODED_ORDER)) + return -1; + if (!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD)) { + av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n"); + } + mpeg_decode_init(avctx); + + avctx->pix_fmt = AV_PIX_FMT_XVMC_MPEG2_IDCT; + avctx->xvmc_acceleration = 2; // 2 - the blocks are packed! + + return 0; +} + +AVCodec ff_mpeg_xvmc_decoder = { + .name = "mpegvideo_xvmc", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_MPEG2VIDEO_XVMC, + .priv_data_size = sizeof(Mpeg1Context), + .init = mpeg_mc_decode_init, + .close = mpeg_decode_end, + .decode = mpeg_decode_frame, + .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | + CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY, + .flush = flush, + .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"), +}; + +#endif + +#if CONFIG_MPEG_VDPAU_DECODER +AVCodec ff_mpeg_vdpau_decoder = { + .name = "mpegvideo_vdpau", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_MPEG2VIDEO, + .priv_data_size = sizeof(Mpeg1Context), + .init = mpeg_decode_init, + .close = mpeg_decode_end, + .decode = mpeg_decode_frame, + .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | + CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY, + .flush = flush, + .long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"), +}; +#endif + +#if CONFIG_MPEG1_VDPAU_DECODER +AVCodec ff_mpeg1_vdpau_decoder = { + .name = "mpeg1video_vdpau", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_MPEG1VIDEO, + .priv_data_size = sizeof(Mpeg1Context), + .init = mpeg_decode_init, + .close = mpeg_decode_end, + .decode = mpeg_decode_frame, + .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | + CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY, + .flush = flush, + .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"), +}; +#endif -- cgit v1.2.3