mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-09 16:48:16 +00:00
5fe061a027
Originally committed as revision 1372 to svn://svn.ffmpeg.org/ffmpeg/trunk
800 lines
23 KiB
C
800 lines
23 KiB
C
/*
|
|
* H263 decoder
|
|
* Copyright (c) 2001 Fabrice Bellard.
|
|
*
|
|
* This library 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 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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 this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include "avcodec.h"
|
|
#include "dsputil.h"
|
|
#include "mpegvideo.h"
|
|
|
|
#if 1
|
|
#define PRINT_QP(a, b) {}
|
|
#else
|
|
#define PRINT_QP(a, b) printf(a, b)
|
|
#endif
|
|
|
|
//#define DEBUG
|
|
//#define PRINT_FRAME_TIME
|
|
#ifdef PRINT_FRAME_TIME
|
|
static inline long long rdtsc()
|
|
{
|
|
long long l;
|
|
asm volatile( "rdtsc\n\t"
|
|
: "=A" (l)
|
|
);
|
|
// printf("%d\n", int(l/1000));
|
|
return l;
|
|
}
|
|
#endif
|
|
|
|
int ff_h263_decode_init(AVCodecContext *avctx)
|
|
{
|
|
MpegEncContext *s = avctx->priv_data;
|
|
|
|
s->avctx = avctx;
|
|
s->out_format = FMT_H263;
|
|
|
|
s->width = avctx->width;
|
|
s->height = avctx->height;
|
|
s->workaround_bugs= avctx->workaround_bugs;
|
|
|
|
// set defaults
|
|
s->quant_precision=5;
|
|
s->progressive_sequence=1;
|
|
s->decode_mb= ff_h263_decode_mb;
|
|
s->low_delay= 1;
|
|
avctx->pix_fmt= PIX_FMT_YUV420P;
|
|
|
|
/* select sub codec */
|
|
switch(avctx->codec->id) {
|
|
case CODEC_ID_H263:
|
|
s->gob_number = 0;
|
|
break;
|
|
case CODEC_ID_MPEG4:
|
|
s->time_increment_bits = 4; /* default value for broken headers */
|
|
s->h263_pred = 1;
|
|
s->low_delay = 0; //default, might be overriden in the vol header during header parsing
|
|
break;
|
|
case CODEC_ID_MSMPEG4V1:
|
|
s->h263_msmpeg4 = 1;
|
|
s->h263_pred = 1;
|
|
s->msmpeg4_version=1;
|
|
break;
|
|
case CODEC_ID_MSMPEG4V2:
|
|
s->h263_msmpeg4 = 1;
|
|
s->h263_pred = 1;
|
|
s->msmpeg4_version=2;
|
|
break;
|
|
case CODEC_ID_MSMPEG4V3:
|
|
s->h263_msmpeg4 = 1;
|
|
s->h263_pred = 1;
|
|
s->msmpeg4_version=3;
|
|
break;
|
|
case CODEC_ID_WMV1:
|
|
s->h263_msmpeg4 = 1;
|
|
s->h263_pred = 1;
|
|
s->msmpeg4_version=4;
|
|
break;
|
|
case CODEC_ID_WMV2:
|
|
s->h263_msmpeg4 = 1;
|
|
s->h263_pred = 1;
|
|
s->msmpeg4_version=5;
|
|
break;
|
|
case CODEC_ID_H263I:
|
|
s->h263_intel = 1;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
s->codec_id= avctx->codec->id;
|
|
|
|
/* for h263, we allocate the images after having read the header */
|
|
if (avctx->codec->id != CODEC_ID_H263 && avctx->codec->id != CODEC_ID_MPEG4)
|
|
if (MPV_common_init(s) < 0)
|
|
return -1;
|
|
|
|
if (s->h263_msmpeg4)
|
|
ff_msmpeg4_decode_init(s);
|
|
else
|
|
h263_decode_init_vlc(s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ff_h263_decode_end(AVCodecContext *avctx)
|
|
{
|
|
MpegEncContext *s = avctx->priv_data;
|
|
|
|
MPV_common_end(s);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* retunrs the number of bytes consumed for building the current frame
|
|
*/
|
|
static int get_consumed_bytes(MpegEncContext *s, int buf_size){
|
|
int pos= (get_bits_count(&s->gb)+7)>>3;
|
|
|
|
if(s->divx_version>=500){
|
|
//we would have to scan through the whole buf to handle the weird reordering ...
|
|
return buf_size;
|
|
}else if(s->flags&CODEC_FLAG_TRUNCATED){
|
|
pos -= s->parse_context.last_index;
|
|
if(pos<0) pos=0; // padding is not really read so this might be -1
|
|
return pos;
|
|
}else{
|
|
if(pos==0) pos=1; //avoid infinite loops (i doubt thats needed but ...)
|
|
if(pos+10>buf_size) pos=buf_size; // oops ;)
|
|
|
|
return pos;
|
|
}
|
|
}
|
|
|
|
static int decode_slice(MpegEncContext *s){
|
|
s->last_resync_gb= s->gb;
|
|
s->first_slice_line= 1;
|
|
|
|
s->resync_mb_x= s->mb_x;
|
|
s->resync_mb_y= s->mb_y;
|
|
|
|
s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
|
|
s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
|
|
|
|
if(s->partitioned_frame){
|
|
const int qscale= s->qscale;
|
|
|
|
if(s->codec_id==CODEC_ID_MPEG4){
|
|
if(ff_mpeg4_decode_partitions(s) < 0)
|
|
return -1;
|
|
}
|
|
|
|
/* restore variables which where modified */
|
|
s->first_slice_line=1;
|
|
s->mb_x= s->resync_mb_x;
|
|
s->mb_y= s->resync_mb_y;
|
|
s->qscale= qscale;
|
|
s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
|
|
s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
|
|
}
|
|
|
|
for(; s->mb_y < s->mb_height; s->mb_y++) {
|
|
/* per-row end of slice checks */
|
|
if(s->msmpeg4_version){
|
|
if(s->resync_mb_y + s->slice_height == s->mb_y){
|
|
const int xy= s->mb_x + s->mb_y*s->mb_width;
|
|
s->error_status_table[xy-1]|= AC_END|DC_END|MV_END;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if(s->msmpeg4_version==1){
|
|
s->last_dc[0]=
|
|
s->last_dc[1]=
|
|
s->last_dc[2]= 128;
|
|
}
|
|
|
|
ff_init_block_index(s);
|
|
for(; s->mb_x < s->mb_width; s->mb_x++) {
|
|
int ret;
|
|
|
|
ff_update_block_index(s);
|
|
|
|
if(s->resync_mb_x == s->mb_x && s->resync_mb_y+1 == s->mb_y){
|
|
s->first_slice_line=0;
|
|
}
|
|
|
|
/* DCT & quantize */
|
|
s->dsp.clear_blocks(s->block[0]);
|
|
|
|
s->mv_dir = MV_DIR_FORWARD;
|
|
s->mv_type = MV_TYPE_16X16;
|
|
// s->mb_skiped = 0;
|
|
//printf("%d %d %06X\n", ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
|
|
ret= s->decode_mb(s, s->block);
|
|
|
|
PRINT_QP("%2d", s->qscale);
|
|
MPV_decode_mb(s, s->block);
|
|
|
|
if(ret<0){
|
|
const int xy= s->mb_x + s->mb_y*s->mb_width;
|
|
if(ret==SLICE_END){
|
|
//printf("%d %d %d %06X\n", s->mb_x, s->mb_y, s->gb.size*8 - get_bits_count(&s->gb), show_bits(&s->gb, 24));
|
|
s->error_status_table[xy]|= AC_END;
|
|
if(!s->partitioned_frame)
|
|
s->error_status_table[xy]|= MV_END|DC_END;
|
|
|
|
s->padding_bug_score--;
|
|
|
|
if(++s->mb_x >= s->mb_width){
|
|
s->mb_x=0;
|
|
ff_draw_horiz_band(s);
|
|
s->mb_y++;
|
|
}
|
|
return 0;
|
|
}else if(ret==SLICE_NOEND){
|
|
fprintf(stderr,"Slice mismatch at MB: %d\n", xy);
|
|
return -1;
|
|
}
|
|
fprintf(stderr,"Error at MB: %d\n", xy);
|
|
s->error_status_table[xy]|= AC_ERROR;
|
|
if(!s->partitioned_frame)
|
|
s->error_status_table[xy]|= DC_ERROR|MV_ERROR;
|
|
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
ff_draw_horiz_band(s);
|
|
|
|
PRINT_QP("%s", "\n");
|
|
|
|
s->mb_x= 0;
|
|
}
|
|
|
|
assert(s->mb_x==0 && s->mb_y==s->mb_height);
|
|
|
|
/* try to detect the padding bug */
|
|
if( s->codec_id==CODEC_ID_MPEG4
|
|
&& (s->workaround_bugs&FF_BUG_AUTODETECT)
|
|
&& s->gb.size*8 - get_bits_count(&s->gb) >=0
|
|
&& s->gb.size*8 - get_bits_count(&s->gb) < 48
|
|
// && !s->resync_marker
|
|
&& !s->data_partitioning){
|
|
|
|
const int bits_count= get_bits_count(&s->gb);
|
|
const int bits_left = s->gb.size*8 - bits_count;
|
|
|
|
if(bits_left==0 || bits_left>8){
|
|
s->padding_bug_score++;
|
|
} else if(bits_left != 1){
|
|
int v= show_bits(&s->gb, 8);
|
|
v|= 0x7F >> (7-(bits_count&7));
|
|
|
|
if(v==0x7F)
|
|
s->padding_bug_score--;
|
|
else
|
|
s->padding_bug_score++;
|
|
}
|
|
|
|
if(s->padding_bug_score > -2)
|
|
s->workaround_bugs |= FF_BUG_NO_PADDING;
|
|
else
|
|
s->workaround_bugs &= ~FF_BUG_NO_PADDING;
|
|
}
|
|
|
|
// handle formats which dont have unique end markers
|
|
if(s->msmpeg4_version || (s->workaround_bugs&FF_BUG_NO_PADDING)){ //FIXME perhaps solve this more cleanly
|
|
int left= s->gb.size*8 - get_bits_count(&s->gb);
|
|
int max_extra=7;
|
|
|
|
/* no markers in M$ crap */
|
|
if(s->msmpeg4_version && s->pict_type==I_TYPE)
|
|
max_extra+= 17;
|
|
|
|
/* buggy padding but the frame should still end approximately at the bitstream end */
|
|
if((s->workaround_bugs&FF_BUG_NO_PADDING) && s->error_resilience>=3)
|
|
max_extra+= 48;
|
|
else if((s->workaround_bugs&FF_BUG_NO_PADDING))
|
|
max_extra+= 256*256*256*64;
|
|
|
|
if(left>max_extra){
|
|
fprintf(stderr, "discarding %d junk bits at end, next would be %X\n", left, show_bits(&s->gb, 24));
|
|
}
|
|
else if(left<0){
|
|
fprintf(stderr, "overreading %d bits\n", -left);
|
|
}else
|
|
s->error_status_table[s->mb_num-1]|= AC_END|MV_END|DC_END;
|
|
|
|
return 0;
|
|
}
|
|
|
|
fprintf(stderr, "slice end not reached but screenspace end (%d left %06X)\n",
|
|
s->gb.size*8 - get_bits_count(&s->gb),
|
|
show_bits(&s->gb, 24));
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* finds the end of the current frame in the bitstream.
|
|
* @return the position of the first byte of the next frame, or -1
|
|
*/
|
|
static int mpeg4_find_frame_end(MpegEncContext *s, UINT8 *buf, int buf_size){
|
|
ParseContext *pc= &s->parse_context;
|
|
int vop_found, i;
|
|
uint32_t state;
|
|
|
|
vop_found= pc->frame_start_found;
|
|
state= pc->state;
|
|
|
|
i=0;
|
|
if(!vop_found){
|
|
for(i=0; i<buf_size; i++){
|
|
state= (state<<8) | buf[i];
|
|
if(state == 0x1B6){
|
|
i++;
|
|
vop_found=1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
for(; i<buf_size; i++){
|
|
state= (state<<8) | buf[i];
|
|
if((state&0xFFFFFF00) == 0x100){
|
|
pc->frame_start_found=0;
|
|
pc->state=-1;
|
|
return i-3;
|
|
}
|
|
}
|
|
pc->frame_start_found= vop_found;
|
|
pc->state= state;
|
|
return -1;
|
|
}
|
|
|
|
int ff_h263_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
UINT8 *buf, int buf_size)
|
|
{
|
|
MpegEncContext *s = avctx->priv_data;
|
|
int ret,i;
|
|
AVFrame *pict = data;
|
|
float new_aspect;
|
|
|
|
#ifdef PRINT_FRAME_TIME
|
|
uint64_t time= rdtsc();
|
|
#endif
|
|
#ifdef DEBUG
|
|
printf("*****frame %d size=%d\n", avctx->frame_number, buf_size);
|
|
printf("bytes=%x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]);
|
|
#endif
|
|
s->flags= avctx->flags;
|
|
|
|
*data_size = 0;
|
|
|
|
/* no supplementary picture */
|
|
if (buf_size == 0) {
|
|
return 0;
|
|
}
|
|
|
|
if(s->flags&CODEC_FLAG_TRUNCATED){
|
|
int next;
|
|
ParseContext *pc= &s->parse_context;
|
|
|
|
pc->last_index= pc->index;
|
|
|
|
if(s->codec_id==CODEC_ID_MPEG4){
|
|
next= mpeg4_find_frame_end(s, buf, buf_size);
|
|
}else{
|
|
fprintf(stderr, "this codec doesnt support truncated bitstreams\n");
|
|
return -1;
|
|
}
|
|
if(next==-1){
|
|
if(buf_size + FF_INPUT_BUFFER_PADDING_SIZE + pc->index > pc->buffer_size){
|
|
pc->buffer_size= buf_size + pc->index + 10*1024;
|
|
pc->buffer= realloc(pc->buffer, pc->buffer_size);
|
|
}
|
|
|
|
memcpy(&pc->buffer[pc->index], buf, buf_size);
|
|
pc->index += buf_size;
|
|
return buf_size;
|
|
}
|
|
|
|
if(pc->index){
|
|
if(next + FF_INPUT_BUFFER_PADDING_SIZE + pc->index > pc->buffer_size){
|
|
pc->buffer_size= next + pc->index + 10*1024;
|
|
pc->buffer= realloc(pc->buffer, pc->buffer_size);
|
|
}
|
|
|
|
memcpy(&pc->buffer[pc->index], buf, next + FF_INPUT_BUFFER_PADDING_SIZE );
|
|
pc->index = 0;
|
|
buf= pc->buffer;
|
|
buf_size= pc->last_index + next;
|
|
}
|
|
}
|
|
|
|
retry:
|
|
|
|
if(s->bitstream_buffer_size && buf_size<20){ //divx 5.01+ frame reorder
|
|
init_get_bits(&s->gb, s->bitstream_buffer, s->bitstream_buffer_size);
|
|
}else
|
|
init_get_bits(&s->gb, buf, buf_size);
|
|
s->bitstream_buffer_size=0;
|
|
|
|
if (!s->context_initialized) {
|
|
if (MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix
|
|
return -1;
|
|
}
|
|
|
|
/* let's go :-) */
|
|
if (s->msmpeg4_version==5) {
|
|
ret= ff_wmv2_decode_picture_header(s);
|
|
} else if (s->msmpeg4_version) {
|
|
ret = msmpeg4_decode_picture_header(s);
|
|
} else if (s->h263_pred) {
|
|
if(s->avctx->extradata_size && s->picture_number==0){
|
|
GetBitContext gb;
|
|
|
|
init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size);
|
|
ret = ff_mpeg4_decode_picture_header(s, &gb);
|
|
}
|
|
ret = ff_mpeg4_decode_picture_header(s, &s->gb);
|
|
|
|
if(s->flags& CODEC_FLAG_LOW_DELAY)
|
|
s->low_delay=1;
|
|
} else if (s->h263_intel) {
|
|
ret = intel_h263_decode_picture_header(s);
|
|
} else {
|
|
ret = h263_decode_picture_header(s);
|
|
}
|
|
avctx->has_b_frames= !s->low_delay;
|
|
|
|
if(s->workaround_bugs&FF_BUG_AUTODETECT){
|
|
if(s->avctx->fourcc == ff_get_fourcc("XVIX"))
|
|
s->workaround_bugs|= FF_BUG_XVID_ILACE;
|
|
#if 0
|
|
if(s->avctx->fourcc == ff_get_fourcc("MP4S"))
|
|
s->workaround_bugs|= FF_BUG_AC_VLC;
|
|
|
|
if(s->avctx->fourcc == ff_get_fourcc("M4S2"))
|
|
s->workaround_bugs|= FF_BUG_AC_VLC;
|
|
#endif
|
|
if(s->avctx->fourcc == ff_get_fourcc("UMP4")){
|
|
s->workaround_bugs|= FF_BUG_UMP4;
|
|
s->workaround_bugs|= FF_BUG_AC_VLC;
|
|
}
|
|
|
|
if(s->divx_version){
|
|
s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
|
|
}
|
|
|
|
if(s->avctx->fourcc == ff_get_fourcc("XVID") && s->xvid_build==0)
|
|
s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
|
|
|
|
if(s->avctx->fourcc == ff_get_fourcc("XVID") && s->xvid_build==0)
|
|
s->padding_bug_score= 256*256*256*64;
|
|
|
|
if(s->xvid_build && s->xvid_build<=3)
|
|
s->padding_bug_score= 256*256*256*64;
|
|
|
|
if(s->xvid_build && s->xvid_build<=1)
|
|
s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
|
|
|
|
//printf("padding_bug_score: %d\n", s->padding_bug_score);
|
|
#if 0
|
|
if(s->divx_version==500)
|
|
s->workaround_bugs|= FF_BUG_NO_PADDING;
|
|
|
|
/* very ugly XVID padding bug detection FIXME/XXX solve this differently
|
|
* lets hope this at least works
|
|
*/
|
|
if( s->resync_marker==0 && s->data_partitioning==0 && s->divx_version==0
|
|
&& s->codec_id==CODEC_ID_MPEG4 && s->vo_type==0)
|
|
s->workaround_bugs|= FF_BUG_NO_PADDING;
|
|
|
|
if(s->lavc_build && s->lavc_build<4609) //FIXME not sure about the version num but a 4609 file seems ok
|
|
s->workaround_bugs|= FF_BUG_NO_PADDING;
|
|
#endif
|
|
}
|
|
|
|
|
|
#if 0 // dump bits per frame / qp / complexity
|
|
{
|
|
static FILE *f=NULL;
|
|
if(!f) f=fopen("rate_qp_cplx.txt", "w");
|
|
fprintf(f, "%d %d %f\n", buf_size, s->qscale, buf_size*(double)s->qscale);
|
|
}
|
|
#endif
|
|
|
|
/* After H263 & mpeg4 header decode we have the height, width,*/
|
|
/* and other parameters. So then we could init the picture */
|
|
/* FIXME: By the way H263 decoder is evolving it should have */
|
|
/* an H263EncContext */
|
|
if(s->aspected_height)
|
|
new_aspect= s->aspected_width*s->width / (float)(s->height*s->aspected_height);
|
|
else
|
|
new_aspect=0;
|
|
|
|
if ( s->width != avctx->width || s->height != avctx->height
|
|
|| ABS(new_aspect - avctx->aspect_ratio) > 0.001) {
|
|
/* H.263 could change picture size any time */
|
|
MPV_common_end(s);
|
|
s->context_initialized=0;
|
|
}
|
|
if (!s->context_initialized) {
|
|
avctx->width = s->width;
|
|
avctx->height = s->height;
|
|
avctx->aspect_ratio= new_aspect;
|
|
|
|
goto retry;
|
|
}
|
|
|
|
if((s->codec_id==CODEC_ID_H263 || s->codec_id==CODEC_ID_H263P))
|
|
s->gob_index = ff_h263_get_gob_height(s);
|
|
|
|
if(ret==FRAME_SKIPED) return get_consumed_bytes(s, buf_size);
|
|
/* skip if the header was thrashed */
|
|
if (ret < 0){
|
|
fprintf(stderr, "header damaged\n");
|
|
return -1;
|
|
}
|
|
|
|
// for hurry_up==5
|
|
s->current_picture.pict_type= s->pict_type;
|
|
s->current_picture.key_frame= s->pict_type == I_TYPE;
|
|
|
|
/* skip b frames if we dont have reference frames */
|
|
if(s->last_picture.data[0]==NULL && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
|
|
/* skip b frames if we are in a hurry */
|
|
if(avctx->hurry_up && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
|
|
/* skip everything if we are in a hurry>=5 */
|
|
if(avctx->hurry_up>=5) return get_consumed_bytes(s, buf_size);
|
|
|
|
if(s->next_p_frame_damaged){
|
|
if(s->pict_type==B_TYPE)
|
|
return get_consumed_bytes(s, buf_size);
|
|
else
|
|
s->next_p_frame_damaged=0;
|
|
}
|
|
|
|
if(MPV_frame_start(s, avctx) < 0)
|
|
return -1;
|
|
|
|
#ifdef DEBUG
|
|
printf("qscale=%d\n", s->qscale);
|
|
#endif
|
|
|
|
if(s->error_resilience)
|
|
memset(s->error_status_table, MV_ERROR|AC_ERROR|DC_ERROR|VP_START|AC_END|DC_END|MV_END, s->mb_num*sizeof(UINT8));
|
|
|
|
/* decode each macroblock */
|
|
s->block_wrap[0]=
|
|
s->block_wrap[1]=
|
|
s->block_wrap[2]=
|
|
s->block_wrap[3]= s->mb_width*2 + 2;
|
|
s->block_wrap[4]=
|
|
s->block_wrap[5]= s->mb_width + 2;
|
|
s->mb_x=0;
|
|
s->mb_y=0;
|
|
|
|
decode_slice(s);
|
|
s->error_status_table[0]|= VP_START;
|
|
while(s->mb_y<s->mb_height && s->gb.size*8 - get_bits_count(&s->gb)>16){
|
|
if(s->msmpeg4_version){
|
|
if(s->mb_x!=0 || (s->mb_y%s->slice_height)!=0)
|
|
break;
|
|
}else{
|
|
if(ff_h263_resync(s)<0)
|
|
break;
|
|
}
|
|
|
|
if(s->msmpeg4_version!=4 && s->h263_pred)
|
|
ff_mpeg4_clean_buffers(s);
|
|
|
|
decode_slice(s);
|
|
|
|
s->error_status_table[s->resync_mb_x + s->resync_mb_y*s->mb_width]|= VP_START;
|
|
}
|
|
|
|
if (s->h263_msmpeg4 && s->msmpeg4_version<4 && s->pict_type==I_TYPE)
|
|
if(msmpeg4_decode_ext_header(s, buf_size) < 0){
|
|
s->error_status_table[s->mb_num-1]= AC_ERROR|DC_ERROR|MV_ERROR;
|
|
}
|
|
|
|
/* divx 5.01+ bistream reorder stuff */
|
|
if(s->codec_id==CODEC_ID_MPEG4 && s->bitstream_buffer_size==0 && s->divx_version>=500){
|
|
int current_pos= get_bits_count(&s->gb)>>3;
|
|
|
|
if( buf_size - current_pos > 5
|
|
&& buf_size - current_pos < BITSTREAM_BUFFER_SIZE){
|
|
int i;
|
|
int startcode_found=0;
|
|
for(i=current_pos; i<buf_size-3; i++){
|
|
if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1 && buf[i+3]==0xB6){
|
|
startcode_found=1;
|
|
break;
|
|
}
|
|
}
|
|
if(startcode_found){
|
|
memcpy(s->bitstream_buffer, buf + current_pos, buf_size - current_pos);
|
|
s->bitstream_buffer_size= buf_size - current_pos;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(s->error_resilience){
|
|
int error=0, num_end_markers=0;
|
|
for(i=0; i<s->mb_num; i++){
|
|
int status= s->error_status_table[i];
|
|
#if 0
|
|
if(i%s->mb_width == 0) printf("\n");
|
|
printf("%2X ", status);
|
|
#endif
|
|
if(status==0) continue;
|
|
|
|
if(status&(DC_ERROR|AC_ERROR|MV_ERROR))
|
|
error=1;
|
|
if(status&VP_START){
|
|
if(num_end_markers)
|
|
error=1;
|
|
num_end_markers=3;
|
|
}
|
|
if(status&AC_END)
|
|
num_end_markers--;
|
|
if(status&DC_END)
|
|
num_end_markers--;
|
|
if(status&MV_END)
|
|
num_end_markers--;
|
|
}
|
|
if(num_end_markers || error){
|
|
fprintf(stderr, "concealing errors\n");
|
|
ff_error_resilience(s);
|
|
}
|
|
}
|
|
|
|
MPV_frame_end(s);
|
|
#if 0 //dirty show MVs, we should export the MV tables and write a filter to show them
|
|
{
|
|
int mb_y;
|
|
s->has_b_frames=1;
|
|
for(mb_y=0; mb_y<s->mb_height; mb_y++){
|
|
int mb_x;
|
|
int y= mb_y*16 + 8;
|
|
for(mb_x=0; mb_x<s->mb_width; mb_x++){
|
|
int x= mb_x*16 + 8;
|
|
uint8_t *ptr= s->last_picture.data[0];
|
|
int xy= 1 + mb_x*2 + (mb_y*2 + 1)*(s->mb_width*2 + 2);
|
|
int mx= (s->motion_val[xy][0]>>1) + x;
|
|
int my= (s->motion_val[xy][1]>>1) + y;
|
|
int i;
|
|
int max;
|
|
|
|
if(mx<0) mx=0;
|
|
if(my<0) my=0;
|
|
if(mx>=s->width) mx= s->width -1;
|
|
if(my>=s->height) my= s->height-1;
|
|
max= ABS(mx-x);
|
|
if(ABS(my-y) > max) max= ABS(my-y);
|
|
/* the ugliest linedrawing routine ... */
|
|
for(i=0; i<max; i++){
|
|
int x1= x + (mx-x)*i/max;
|
|
int y1= y + (my-y)*i/max;
|
|
ptr[y1*s->linesize + x1]+=100;
|
|
}
|
|
ptr[y*s->linesize + x]+=100;
|
|
s->mbskip_table[mb_x + mb_y*s->mb_width]=0;
|
|
}
|
|
}
|
|
|
|
}
|
|
#endif
|
|
|
|
if(s->pict_type==B_TYPE || s->low_delay){
|
|
*pict= *(AVFrame*)&s->current_picture;
|
|
} else {
|
|
*pict= *(AVFrame*)&s->last_picture;
|
|
}
|
|
|
|
if(avctx->debug&FF_DEBUG_QP){
|
|
int8_t *qtab= pict->qscale_table;
|
|
int x,y;
|
|
|
|
for(y=0; y<s->mb_height; y++){
|
|
for(x=0; x<s->mb_width; x++){
|
|
printf("%2d ", qtab[x + y*s->mb_width]);
|
|
}
|
|
printf("\n");
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
/* Return the Picture timestamp as the frame number */
|
|
/* we substract 1 because it is added on utils.c */
|
|
avctx->frame_number = s->picture_number - 1;
|
|
|
|
/* dont output the last pic after seeking */
|
|
if(s->last_picture.data[0] || s->low_delay)
|
|
*data_size = sizeof(AVFrame);
|
|
#ifdef PRINT_FRAME_TIME
|
|
printf("%Ld\n", rdtsc()-time);
|
|
#endif
|
|
return get_consumed_bytes(s, buf_size);
|
|
}
|
|
|
|
AVCodec mpeg4_decoder = {
|
|
"mpeg4",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MPEG4,
|
|
sizeof(MpegEncContext),
|
|
ff_h263_decode_init,
|
|
NULL,
|
|
ff_h263_decode_end,
|
|
ff_h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
|
|
};
|
|
|
|
AVCodec h263_decoder = {
|
|
"h263",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_H263,
|
|
sizeof(MpegEncContext),
|
|
ff_h263_decode_init,
|
|
NULL,
|
|
ff_h263_decode_end,
|
|
ff_h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
};
|
|
|
|
AVCodec msmpeg4v1_decoder = {
|
|
"msmpeg4v1",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MSMPEG4V1,
|
|
sizeof(MpegEncContext),
|
|
ff_h263_decode_init,
|
|
NULL,
|
|
ff_h263_decode_end,
|
|
ff_h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
};
|
|
|
|
AVCodec msmpeg4v2_decoder = {
|
|
"msmpeg4v2",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MSMPEG4V2,
|
|
sizeof(MpegEncContext),
|
|
ff_h263_decode_init,
|
|
NULL,
|
|
ff_h263_decode_end,
|
|
ff_h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
};
|
|
|
|
AVCodec msmpeg4v3_decoder = {
|
|
"msmpeg4",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MSMPEG4V3,
|
|
sizeof(MpegEncContext),
|
|
ff_h263_decode_init,
|
|
NULL,
|
|
ff_h263_decode_end,
|
|
ff_h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
};
|
|
|
|
AVCodec wmv1_decoder = {
|
|
"wmv1",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_WMV1,
|
|
sizeof(MpegEncContext),
|
|
ff_h263_decode_init,
|
|
NULL,
|
|
ff_h263_decode_end,
|
|
ff_h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
};
|
|
|
|
AVCodec h263i_decoder = {
|
|
"h263i",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_H263I,
|
|
sizeof(MpegEncContext),
|
|
ff_h263_decode_init,
|
|
NULL,
|
|
ff_h263_decode_end,
|
|
ff_h263_decode_frame,
|
|
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
|
|
};
|
|
|