mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-12-05 01:56:41 +00:00
6101e5322f
* qatar/master: rtpdec_asf: Set the no_resync_search option for the chained asf demuxer asfdec: Add an option for not searching for the packet markers cosmetics: Clean up the tiffenc pix_fmts declaration to match the style of others cosmetics: Align codec declarations cosmetics: Convert mimic.c to utf-8 avconv: remove an unused function parameter. avconv: remove now pointless variables. avconv: drop support for building without libavfilter. nellymoserenc: fix crash due to memsetting the wrong area. libavformat: Only require first packet to be known for audio/video streams avplay: Don't try to scale timestamps if the tb isn't set Conflicts: Changelog configure ffmpeg.c libavcodec/aacenc.c libavcodec/bmpenc.c libavcodec/dnxhddec.c libavcodec/dnxhdenc.c libavcodec/ffv1.c libavcodec/flacenc.c libavcodec/fraps.c libavcodec/huffyuv.c libavcodec/libopenjpegdec.c libavcodec/mpeg12enc.c libavcodec/mpeg4videodec.c libavcodec/pamenc.c libavcodec/pgssubdec.c libavcodec/pngenc.c libavcodec/qtrleenc.c libavcodec/rawdec.c libavcodec/sgienc.c libavcodec/tiffenc.c libavcodec/v210dec.c libavcodec/wmv2dec.c libavformat/utils.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
334 lines
11 KiB
C
334 lines
11 KiB
C
/*
|
|
* 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
|
|
* Electronic Arts Madcow Video Decoder
|
|
* @author Peter Ross <pross@xvid.org>
|
|
*
|
|
* @see technical details at
|
|
* 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"
|
|
#include "libavutil/imgutils.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] = av_bswap16(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;
|
|
ff_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) {
|
|
unsigned offset = (mb_y*16 + ((j&2)<<2) + mv_y)*t->last_frame.linesize[0] + mb_x*16 + ((j&1)<<3) + mv_x;
|
|
if (offset >= (s->height - 7) * t->last_frame.linesize[0] - 7)
|
|
return;
|
|
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] + offset,
|
|
t->last_frame.linesize[0], add);
|
|
} else if (!(s->avctx->flags & CODEC_FLAG_GRAY)) {
|
|
int index = j - 3;
|
|
unsigned offset = (mb_y * 8 + (mv_y/2))*t->last_frame.linesize[index] + mb_x * 8 + (mv_x/2);
|
|
if (offset >= (s->height/2 - 7) * t->last_frame.linesize[index] - 7)
|
|
return;
|
|
comp(t->frame.data[index] + (mb_y*8)*t->frame.linesize[index] + mb_x * 8,
|
|
t->frame.linesize[index],
|
|
t->last_frame.data[index] + offset,
|
|
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 int 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 */
|
|
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*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 -1;
|
|
}
|
|
|
|
block[j] = level;
|
|
}
|
|
CLOSE_READER(re, &s->gb);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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 int 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);
|
|
}
|
|
}
|
|
|
|
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);
|
|
if (t->last_frame.data[0])
|
|
comp_block(t, s->mb_x, s->mb_y, j, mv_x, mv_y, add);
|
|
} else {
|
|
s->dsp.clear_block(t->block);
|
|
if(decode_block_intra(t, t->block) < 0)
|
|
return -1;
|
|
idct_put(t, t->block, s->mb_x, s->mb_y, j);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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((s->width * s->height)/2048*7 > buf_end-buf)
|
|
return -1;
|
|
if (av_image_check_size(s->width, s->height, 0, avctx) < 0)
|
|
return -1;
|
|
avcodec_set_dimensions(avctx, s->width, s->height);
|
|
if (t->frame.data[0])
|
|
avctx->release_buffer(avctx, &t->frame);
|
|
if (t->last_frame.data[0])
|
|
avctx->release_buffer(avctx, &t->last_frame);
|
|
}
|
|
|
|
t->frame.reference = 3;
|
|
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);
|
|
memset((uint8_t*)t->bitstream_buf + (buf_end-buf), 0, FF_INPUT_BUFFER_PADDING_SIZE);
|
|
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++)
|
|
if(decode_mb(t, inter) < 0)
|
|
return -1;
|
|
|
|
*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 ff_eamad_decoder = {
|
|
.name = "eamad",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_MAD,
|
|
.priv_data_size = sizeof(MadContext),
|
|
.init = decode_init,
|
|
.close = decode_end,
|
|
.decode = decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Electronic Arts Madcow Video")
|
|
};
|