diff options
| author | Diego Biurrun <diego@biurrun.de> | 2013-03-26 19:50:40 +0100 |
|---|---|---|
| committer | Diego Biurrun <diego@biurrun.de> | 2013-03-27 14:26:11 +0100 |
| commit | 1b6d66745ac1768adb387c2227cdcf4452271149 (patch) | |
| tree | 84c3cf57792c265ea95b30009676fd048cfe7a47 /libavcodec/mpeg12.c | |
| parent | eee2000b41234ae9465c314e18bfec1700181f32 (diff) | |
Split MPEG-1/2 decoder code off from MPEG-1/2 common code
Diffstat (limited to 'libavcodec/mpeg12.c')
| -rw-r--r-- | libavcodec/mpeg12.c | 2440 |
1 files changed, 11 insertions, 2429 deletions
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 <assert.h> - -#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]); @@ -701,1456 +155,6 @@ 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]) -{ - 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, 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); - - 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, 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, 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 @@ -2214,425 +218,3 @@ int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, 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 |