diff options
| -rw-r--r-- | Changelog | 1 | ||||
| -rw-r--r-- | doc/general.texi | 1 | ||||
| -rw-r--r-- | libavcodec/Makefile | 1 | ||||
| -rw-r--r-- | libavcodec/allcodecs.c | 1 | ||||
| -rw-r--r-- | libavcodec/avcodec.h | 3 | ||||
| -rw-r--r-- | libavcodec/eamad.c | 318 |
6 files changed, 324 insertions, 1 deletions
@@ -24,6 +24,7 @@ version <next>: - SoX native format muxer and demuxer - AMR-NB decoding/encoding, AMR-WB decoding via OpenCORE libraries - DPX image decoder +- Electronic Arts Madcow decoder diff --git a/doc/general.texi b/doc/general.texi index 1ea26af659..0139b5fc33 100644 --- a/doc/general.texi +++ b/doc/general.texi @@ -356,6 +356,7 @@ following image formats are supported: @tab Codec originally used in Feeble Files game. @item Electronic Arts CMV video @tab @tab X @tab Used in NHL 95 game. +@item Electronic Arts Madcow video @tab @tab X @item Electronic Arts TGV video @tab @tab X @item Electronic Arts TGQ video @tab @tab X @item Electronic Arts TQI video @tab @tab X diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 13153eda9f..da030fc889 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -76,6 +76,7 @@ OBJS-$(CONFIG_DVVIDEO_ENCODER) += dv.o OBJS-$(CONFIG_DXA_DECODER) += dxa.o OBJS-$(CONFIG_EAC3_DECODER) += eac3dec.o ac3dec.o ac3tab.o ac3dec_data.o ac3.o OBJS-$(CONFIG_EACMV_DECODER) += eacmv.o +OBJS-$(CONFIG_EAMAD_DECODER) += eamad.o eaidct.o OBJS-$(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 mpegvideo.o error_resilience.o diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c index 76cde27216..cd99e30ce4 100644 --- a/libavcodec/allcodecs.c +++ b/libavcodec/allcodecs.c @@ -81,6 +81,7 @@ void avcodec_register_all(void) REGISTER_ENCDEC (DVVIDEO, dvvideo); REGISTER_DECODER (DXA, dxa); REGISTER_DECODER (EACMV, eacmv); + REGISTER_DECODER (EAMAD, eamad); REGISTER_DECODER (EATGQ, eatgq); REGISTER_DECODER (EATGV, eatgv); REGISTER_DECODER (EATQI, eatqi); diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h index be85ef113b..7f26711f60 100644 --- a/libavcodec/avcodec.h +++ b/libavcodec/avcodec.h @@ -30,7 +30,7 @@ #include "libavutil/avutil.h" #define LIBAVCODEC_VERSION_MAJOR 52 -#define LIBAVCODEC_VERSION_MINOR 30 +#define LIBAVCODEC_VERSION_MINOR 31 #define LIBAVCODEC_VERSION_MICRO 2 #define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \ @@ -197,6 +197,7 @@ enum CodecID { CODEC_ID_TMV, CODEC_ID_V210, CODEC_ID_DPX, + CODEC_ID_MAD, /* various PCM "codecs" */ CODEC_ID_PCM_S16LE= 0x10000, diff --git a/libavcodec/eamad.c b/libavcodec/eamad.c new file mode 100644 index 0000000000..b4e6c42d57 --- /dev/null +++ b/libavcodec/eamad.c @@ -0,0 +1,318 @@ +/* + * Electronic Arts Madcow Video Decoder + * Copyright (c) 2007-2009 Peter Ross + * + * This file is part of FFmpeg. + * + * FFmpeg 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. + * + * FFmpeg 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 FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file libavcodec/eamad.c + * Electronic Arts Madcow Video Decoder + * by Peter Ross <pross@xvid.org> + * + * Technical details here: + * http://wiki.multimedia.cx/index.php?title=Electronic_Arts_MAD + */ + +#include "avcodec.h" +#include "get_bits.h" +#include "dsputil.h" +#include "aandcttab.h" +#include "mpeg12.h" +#include "mpeg12data.h" + +#define EA_PREAMBLE_SIZE 8 +#define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD i-frame */ +#define MADm_TAG MKTAG('M', 'A', 'D', 'm') /* MAD p-frame */ +#define MADe_TAG MKTAG('M', 'A', 'D', 'e') /* MAD lqp-frame */ + +typedef struct MadContext { + MpegEncContext s; + AVFrame frame; + AVFrame last_frame; + void *bitstream_buf; + unsigned int bitstream_buf_size; + DECLARE_ALIGNED_16(DCTELEM, block[64]); +} MadContext; + +static void bswap16_buf(uint16_t *dst, const uint16_t *src, int count) +{ + int i; + for (i=0; i<count; i++) + dst[i] = bswap_16(src[i]); +} + +static av_cold int decode_init(AVCodecContext *avctx) +{ + MadContext *t = avctx->priv_data; + MpegEncContext *s = &t->s; + s->avctx = avctx; + avctx->pix_fmt = PIX_FMT_YUV420P; + if (avctx->idct_algo == FF_IDCT_AUTO) + avctx->idct_algo = FF_IDCT_EA; + dsputil_init(&s->dsp, avctx); + ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct); + ff_mpeg12_init_vlcs(); + return 0; +} + +static inline void comp(unsigned char *dst, int dst_stride, + unsigned char *src, int src_stride, int add) +{ + int j, i; + for (j=0; j<8; j++) + for (i=0; i<8; i++) + dst[j*dst_stride + i] = av_clip_uint8(src[j*src_stride + i] + add); +} + +static inline void comp_block(MadContext *t, int mb_x, int mb_y, + int j, int mv_x, int mv_y, int add) +{ + MpegEncContext *s = &t->s; + if (j < 4) { + comp(t->frame.data[0] + (mb_y*16 + ((j&2)<<2))*t->frame.linesize[0] + mb_x*16 + ((j&1)<<3), + t->frame.linesize[0], + t->last_frame.data[0] + (mb_y*16 + ((j&2)<<2) + mv_y)*t->last_frame.linesize[0] + mb_x*16 + ((j&1)<<3) + mv_x, + t->last_frame.linesize[0], add); + } else if (!(s->avctx->flags & CODEC_FLAG_GRAY)) { + int index = j - 3; + comp(t->frame.data[index] + (mb_y*8)*t->frame.linesize[index] + mb_x * 8, + t->frame.linesize[index], + t->last_frame.data[index] + (mb_y * 8 + (mv_y/2))*t->last_frame.linesize[index] + mb_x * 8 + (mv_x/2), + t->last_frame.linesize[index], add); + } +} + +static inline void idct_put(MadContext *t, DCTELEM *block, int mb_x, int mb_y, int j) +{ + MpegEncContext *s = &t->s; + if (j < 4) { + s->dsp.idct_put( + t->frame.data[0] + (mb_y*16 + ((j&2)<<2))*t->frame.linesize[0] + mb_x*16 + ((j&1)<<3), + t->frame.linesize[0], block); + } else if (!(s->avctx->flags & CODEC_FLAG_GRAY)) { + int index = j - 3; + s->dsp.idct_put( + t->frame.data[index] + (mb_y*8)*t->frame.linesize[index] + mb_x*8, + t->frame.linesize[index], block); + } +} + +static inline void decode_block_intra(MadContext * t, DCTELEM * block) +{ + MpegEncContext *s = &t->s; + int level, i, j, run; + RLTable *rl = &ff_rl_mpeg1; + const uint8_t *scantable = s->intra_scantable.permutated; + int16_t *quant_matrix = s->intra_matrix; + + block[0] = (128 + get_sbits(&s->gb, 8)) * quant_matrix[0]; + + /* The RL decoder is derived from mpeg1_decode_block_intra; + Escaped level and run values a decoded differently */ + { + 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*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 */ + UPDATE_CACHE(re, &s->gb); + level = SHOW_SBITS(re, &s->gb, 10); SKIP_BITS(re, &s->gb, 10); + + UPDATE_CACHE(re, &s->gb); + run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); + + i += run; + j = scantable[i]; + if (level < 0) { + level = -level; + level = (level*quant_matrix[j]) >> 4; + level = (level-1)|1; + level = -level; + } else { + level = (level*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; + } + + block[j] = level; + } + CLOSE_READER(re, &s->gb); + } +} + +static int decode_motion(GetBitContext *gb) +{ + int value = 0; + if (get_bits1(gb)) { + if (get_bits1(gb)) + value = -17; + value += get_bits(gb, 4) + 1; + } + return value; +} + +static void decode_mb(MadContext *t, int inter) +{ + MpegEncContext *s = &t->s; + int mv_map = 0; + int mv_x, mv_y; + int j; + + if (inter) { + int v = decode210(&s->gb); + if (v < 2) { + mv_map = v ? get_bits(&s->gb, 6) : 63; + mv_x = decode_motion(&s->gb); + mv_y = decode_motion(&s->gb); + } else { + mv_map = 0; + } + } + + for (j=0; j<6; j++) { + if (mv_map & (1<<j)) { // mv_x and mv_y are guarded by mv_map + int add = 2*decode_motion(&s->gb); + comp_block(t, s->mb_x, s->mb_y, j, mv_x, mv_y, add); + } else { + s->dsp.clear_block(t->block); + decode_block_intra(t, t->block); + idct_put(t, t->block, s->mb_x, s->mb_y, j); + } + } +} + +static void calc_intra_matrix(MadContext *t, int qscale) +{ + MpegEncContext *s = &t->s; + int i; + + if (s->avctx->idct_algo == FF_IDCT_EA) { + s->intra_matrix[0] = (ff_inv_aanscales[0]*ff_mpeg1_default_intra_matrix[0]) >> 11; + for (i=1; i<64; i++) + s->intra_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32) >> 10; + } else { + s->intra_matrix[0] = ff_mpeg1_default_intra_matrix[0]; + for (i=1; i<64; i++) + s->intra_matrix[i] = (ff_mpeg1_default_intra_matrix[i]*qscale) << 1; + } +} + +static int decode_frame(AVCodecContext *avctx, + void *data, int *data_size, + AVPacket *avpkt) +{ + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + const uint8_t *buf_end = buf+buf_size; + MadContext *t = avctx->priv_data; + MpegEncContext *s = &t->s; + int chunk_type; + int inter; + + if (buf_size < 17) { + av_log(avctx, AV_LOG_ERROR, "Input buffer too small\n"); + *data_size = 0; + return -1; + } + + chunk_type = AV_RL32(&buf[0]); + inter = (chunk_type == MADm_TAG || chunk_type == MADe_TAG); + buf += 8; + + av_reduce(&avctx->time_base.num, &avctx->time_base.den, + AV_RL16(&buf[6]), 1000, 1<<30); + + s->width = AV_RL16(&buf[8]); + s->height = AV_RL16(&buf[10]); + calc_intra_matrix(t, buf[13]); + buf += 16; + + if (avctx->width != s->width || avctx->height != s->height) { + if (avcodec_check_dimensions(avctx, s->width, s->height) < 0) + return -1; + avcodec_set_dimensions(avctx, s->width, s->height); + if (t->frame.data[0]) + avctx->release_buffer(avctx, &t->frame); + } + + t->frame.reference = 1; + if (!t->frame.data[0]) { + if (avctx->get_buffer(avctx, &t->frame) < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return -1; + } + } + + av_fast_malloc(&t->bitstream_buf, &t->bitstream_buf_size, (buf_end-buf) + FF_INPUT_BUFFER_PADDING_SIZE); + if (!t->bitstream_buf) + return AVERROR(ENOMEM); + bswap16_buf(t->bitstream_buf, (const uint16_t*)buf, (buf_end-buf)/2); + init_get_bits(&s->gb, t->bitstream_buf, 8*(buf_end-buf)); + + for (s->mb_y=0; s->mb_y < (avctx->height+15)/16; s->mb_y++) + for (s->mb_x=0; s->mb_x < (avctx->width +15)/16; s->mb_x++) + decode_mb(t, inter); + + *data_size = sizeof(AVFrame); + *(AVFrame*)data = t->frame; + + if (chunk_type != MADe_TAG) + FFSWAP(AVFrame, t->frame, t->last_frame); + + return buf_size; +} + +static av_cold int decode_end(AVCodecContext *avctx) +{ + MadContext *t = avctx->priv_data; + if (t->frame.data[0]) + avctx->release_buffer(avctx, &t->frame); + if (t->last_frame.data[0]) + avctx->release_buffer(avctx, &t->last_frame); + av_free(t->bitstream_buf); + return 0; +} + +AVCodec eamad_decoder = { + "eamad", + CODEC_TYPE_VIDEO, + CODEC_ID_MAD, + sizeof(MadContext), + decode_init, + NULL, + decode_end, + decode_frame, + CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts Madcow Video") +}; |