/*
- * H263 decoder
+ * H.263 decoder
* Copyright (c) 2001 Fabrice Bellard.
+ * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms 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
*/
+
+/**
+ * @file h263dec.c
+ * H.263 decoder.
+ */
+
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
//#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
-static int h263_decode_init(AVCodecContext *avctx)
+int ff_h263_decode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
s->height = avctx->height;
s->workaround_bugs= avctx->workaround_bugs;
+ // set defaults
+ MPV_decode_defaults(s);
+ s->quant_precision=5;
+ s->decode_mb= ff_h263_decode_mb;
+ s->low_delay= 1;
+ avctx->pix_fmt= PIX_FMT_YUV420P;
+ s->unrestricted_mv= 1;
+
/* select sub codec */
switch(avctx->codec->id) {
case CODEC_ID_H263:
- s->gob_number = 0;
- s->first_slice_line = 0;
+ s->unrestricted_mv= 0;
break;
case CODEC_ID_MPEG4:
+ s->decode_mb= ff_mpeg4_decode_mb;
s->time_increment_bits = 4; /* default value for broken headers */
s->h263_pred = 1;
- s->has_b_frames = 1; //default, might be overriden in the vol header during header parsing
+ 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->msmpeg4_version=5;
break;
case CODEC_ID_H263I:
- s->h263_intel = 1;
+ break;
+ case CODEC_ID_FLV1:
+ s->h263_flv = 1;
break;
default:
return -1;
return 0;
}
-static int h263_decode_end(AVCodecContext *avctx)
+int ff_h263_decode_end(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
*/
static int get_consumed_bytes(MpegEncContext *s, int buf_size){
int pos= (get_bits_count(&s->gb)+7)>>3;
-
- if(s->divx_version>=500){
+
+ if(s->divx_packed){
//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 ;)
}
}
-static int h263_decode_frame(AVCodecContext *avctx,
+static int decode_slice(MpegEncContext *s){
+ const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
+ 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;
+
+ ff_set_qscale(s, 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 were modified */
+ s->first_slice_line=1;
+ s->mb_x= s->resync_mb_x;
+ s->mb_y= s->resync_mb_y;
+ ff_set_qscale(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){
+ ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, 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);
+
+ if (s->pict_type!=B_TYPE)
+ ff_h263_update_motion_val(s);
+
+ if(ret<0){
+ const int xy= s->mb_x + s->mb_y*s->mb_stride;
+ if(ret==SLICE_END){
+ MPV_decode_mb(s, s->block);
+ if(s->loop_filter)
+ ff_h263_loop_filter(s);
+
+//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));
+ ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
+
+ s->padding_bug_score--;
+
+ if(++s->mb_x >= s->mb_width){
+ s->mb_x=0;
+ ff_draw_horiz_band(s, s->mb_y*16, 16);
+ s->mb_y++;
+ }
+ return 0;
+ }else if(ret==SLICE_NOEND){
+ av_log(s->avctx, AV_LOG_ERROR, "Slice mismatch at MB: %d\n", xy);
+ ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x+1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
+ return -1;
+ }
+ av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
+ ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
+
+ return -1;
+ }
+
+ MPV_decode_mb(s, s->block);
+ if(s->loop_filter)
+ ff_h263_loop_filter(s);
+ }
+
+ ff_draw_horiz_band(s, s->mb_y*16, 16);
+
+ 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_in_bits - get_bits_count(&s->gb) >=0
+ && s->gb.size_in_bits - 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_in_bits - bits_count;
+
+ if(bits_left==0){
+ s->padding_bug_score+=16;
+ }else if(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++;
+ }
+ }
+
+ // 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_in_bits - 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){
+ av_log(s->avctx, AV_LOG_ERROR, "discarding %d junk bits at end, next would be %X\n", left, show_bits(&s->gb, 24));
+ }
+ else if(left<0){
+ av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left);
+ }else
+ ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
+
+ return 0;
+ }
+
+ av_log(s->avctx, AV_LOG_ERROR, "slice end not reached but screenspace end (%d left %06X, score= %d)\n",
+ s->gb.size_in_bits - get_bits_count(&s->gb),
+ show_bits(&s->gb, 24), s->padding_bug_score);
+
+ ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
+
+ 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
+ */
+int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size){
+ 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;
+ }
+ }
+ }
+
+ if(vop_found){
+ /* EOF considered as end of frame */
+ if (buf_size == 0)
+ return 0;
+ 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 END_NOT_FOUND;
+}
+
+static int h263_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size){
+ 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>>(32-22) == 0x20){
+ i++;
+ vop_found=1;
+ break;
+ }
+ }
+ }
+
+ if(vop_found){
+ for(; i<buf_size; i++){
+ state= (state<<8) | buf[i];
+ if(state>>(32-22) == 0x20){
+ pc->frame_start_found=0;
+ pc->state=-1;
+ return i-3;
+ }
+ }
+ }
+ pc->frame_start_found= vop_found;
+ pc->state= state;
+
+ return END_NOT_FOUND;
+}
+
+static int h263_parse(AVCodecParserContext *s,
+ AVCodecContext *avctx,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size)
+{
+ ParseContext *pc = s->priv_data;
+ int next;
+
+ next= h263_find_frame_end(pc, buf, buf_size);
+
+ if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
+ *poutbuf = NULL;
+ *poutbuf_size = 0;
+ return buf_size;
+ }
+
+ *poutbuf = (uint8_t *)buf;
+ *poutbuf_size = buf_size;
+ return next;
+}
+
+int ff_h263_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- UINT8 *buf, int buf_size)
+ uint8_t *buf, int buf_size)
{
MpegEncContext *s = avctx->priv_data;
int ret;
- AVPicture *pict = data;
+ AVFrame *pict = data;
+
#ifdef PRINT_FRAME_TIME
uint64_t time= rdtsc();
#endif
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->hurry_up= avctx->hurry_up;
- s->error_resilience= avctx->error_resilience;
-
- s->workaround_bugs= avctx->workaround_bugs;
- if(s->avctx->fourcc == ff_get_fourcc("XVIX") && s->workaround_bugs==0)
- s->workaround_bugs=2;
-
s->flags= avctx->flags;
+ s->flags2= avctx->flags2;
- *data_size = 0;
-
- /* no supplementary picture */
+ /* no supplementary picture */
if (buf_size == 0) {
+ /* special case for last picture */
+ if (s->low_delay==0 && s->next_picture_ptr) {
+ *pict= *(AVFrame*)s->next_picture_ptr;
+ s->next_picture_ptr= NULL;
+
+ *data_size = sizeof(AVFrame);
+ }
+
return 0;
}
- 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);
+ if(s->flags&CODEC_FLAG_TRUNCATED){
+ int next;
+
+ if(s->codec_id==CODEC_ID_MPEG4){
+ next= ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size);
+ }else if(s->codec_id==CODEC_ID_H263){
+ next= h263_find_frame_end(&s->parse_context, buf, buf_size);
+ }else{
+ av_log(s->avctx, AV_LOG_ERROR, "this codec doesnt support truncated bitstreams\n");
+ return -1;
+ }
+
+ if( ff_combine_frame(&s->parse_context, next, &buf, &buf_size) < 0 )
+ return buf_size;
+ }
+
+
+retry:
+
+ if(s->bitstream_buffer_size && (s->divx_packed || buf_size<20)){ //divx 5.01+/xvid frame reorder
+ init_get_bits(&s->gb, s->bitstream_buffer, s->bitstream_buffer_size*8);
}else
- init_get_bits(&s->gb, buf, buf_size);
+ init_get_bits(&s->gb, buf, buf_size*8);
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;
+ }
+
+ //we need to set current_picture_ptr before reading the header, otherwise we cant store anyting im there
+ if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){
+ int i= ff_find_unused_picture(s, 0);
+ s->current_picture_ptr= &s->picture[i];
+ }
+
/* let's go :-) */
- if (s->h263_msmpeg4) {
+ 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) {
- ret = mpeg4_decode_picture_header(s);
- s->has_b_frames= !s->low_delay;
- } else if (s->h263_intel) {
+ if(s->avctx->extradata_size && s->picture_number==0){
+ GetBitContext gb;
+
+ init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
+ 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->codec_id == CODEC_ID_H263I) {
ret = intel_h263_decode_picture_header(s);
+ } else if (s->h263_flv) {
+ ret = flv_h263_decode_picture_header(s);
} else {
ret = h263_decode_picture_header(s);
}
- avctx->has_b_frames= s->has_b_frames;
+
+ if(ret==FRAME_SKIPED) return get_consumed_bytes(s, buf_size);
+
+ /* skip if the header was thrashed */
+ if (ret < 0){
+ av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
+ return -1;
+ }
+
+ avctx->has_b_frames= !s->low_delay;
+
+ if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){
+ if(s->avctx->stream_codec_tag == ff_get_fourcc("XVID") ||
+ s->avctx->codec_tag == ff_get_fourcc("XVID") || s->avctx->codec_tag == ff_get_fourcc("XVIX"))
+ s->xvid_build= -1;
+#if 0
+ if(s->avctx->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==1
+ && s->padding_bug_score > 0 && s->low_delay) // XVID with modified fourcc
+ s->xvid_build= -1;
+#endif
+ }
+
+ if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){
+ if(s->avctx->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==0)
+ s->divx_version= 400; //divx 4
+ }
+
+ if(s->workaround_bugs&FF_BUG_AUTODETECT){
+ s->workaround_bugs &= ~FF_BUG_NO_PADDING;
+
+ if(s->padding_bug_score > -2 && !s->data_partitioning && (s->divx_version || !s->resync_marker))
+ s->workaround_bugs |= FF_BUG_NO_PADDING;
+
+ if(s->avctx->codec_tag == ff_get_fourcc("XVIX"))
+ s->workaround_bugs|= FF_BUG_XVID_ILACE;
+
+ if(s->avctx->codec_tag == ff_get_fourcc("UMP4")){
+ s->workaround_bugs|= FF_BUG_UMP4;
+ }
+
+ if(s->divx_version>=500){
+ s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
+ }
+
+ if(s->divx_version>502){
+ s->workaround_bugs|= FF_BUG_QPEL_CHROMA2;
+ }
+
+ 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;
+
+ if(s->xvid_build && s->xvid_build<=12)
+ s->workaround_bugs|= FF_BUG_EDGE;
+
+ if(s->xvid_build && s->xvid_build<=32)
+ s->workaround_bugs|= FF_BUG_DC_CLIP;
+
+#define SET_QPEL_FUNC(postfix1, postfix2) \
+ s->dsp.put_ ## postfix1 = ff_put_ ## postfix2;\
+ s->dsp.put_no_rnd_ ## postfix1 = ff_put_no_rnd_ ## postfix2;\
+ s->dsp.avg_ ## postfix1 = ff_avg_ ## postfix2;
+
+ if(s->lavc_build && s->lavc_build<4653)
+ s->workaround_bugs|= FF_BUG_STD_QPEL;
+
+ if(s->lavc_build && s->lavc_build<4655)
+ s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE;
+
+ if(s->lavc_build && s->lavc_build<4670){
+ s->workaround_bugs|= FF_BUG_EDGE;
+ }
+
+ if(s->lavc_build && s->lavc_build<=4712)
+ s->workaround_bugs|= FF_BUG_DC_CLIP;
+
+ if(s->divx_version)
+ s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE;
+//printf("padding_bug_score: %d\n", s->padding_bug_score);
+ if(s->divx_version==501 && s->divx_build==20020416)
+ s->padding_bug_score= 256*256*256*64;
+
+ if(s->divx_version && s->divx_version<500){
+ s->workaround_bugs|= FF_BUG_EDGE;
+ }
+
+ if(s->divx_version)
+ s->workaround_bugs|= FF_BUG_HPEL_CHROMA;
+#if 0
+ if(s->divx_version==500)
+ s->padding_bug_score= 256*256*256*64;
+
+ /* 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(s->workaround_bugs& FF_BUG_STD_QPEL){
+ SET_QPEL_FUNC(qpel_pixels_tab[0][ 5], qpel16_mc11_old_c)
+ SET_QPEL_FUNC(qpel_pixels_tab[0][ 7], qpel16_mc31_old_c)
+ SET_QPEL_FUNC(qpel_pixels_tab[0][ 9], qpel16_mc12_old_c)
+ SET_QPEL_FUNC(qpel_pixels_tab[0][11], qpel16_mc32_old_c)
+ SET_QPEL_FUNC(qpel_pixels_tab[0][13], qpel16_mc13_old_c)
+ SET_QPEL_FUNC(qpel_pixels_tab[0][15], qpel16_mc33_old_c)
+
+ SET_QPEL_FUNC(qpel_pixels_tab[1][ 5], qpel8_mc11_old_c)
+ SET_QPEL_FUNC(qpel_pixels_tab[1][ 7], qpel8_mc31_old_c)
+ SET_QPEL_FUNC(qpel_pixels_tab[1][ 9], qpel8_mc12_old_c)
+ SET_QPEL_FUNC(qpel_pixels_tab[1][11], qpel8_mc32_old_c)
+ SET_QPEL_FUNC(qpel_pixels_tab[1][13], qpel8_mc13_old_c)
+ SET_QPEL_FUNC(qpel_pixels_tab[1][15], qpel8_mc33_old_c)
+ }
+
+ if(avctx->debug & FF_DEBUG_BUGS)
+ av_log(s->avctx, AV_LOG_DEBUG, "bugs: %X lavc_build:%d xvid_build:%d divx_version:%d divx_build:%d %s\n",
+ s->workaround_bugs, s->lavc_build, s->xvid_build, s->divx_version, s->divx_build,
+ s->divx_packed ? "p" : "");
+
#if 0 // dump bits per frame / qp / complexity
{
static FILE *f=NULL;
fprintf(f, "%d %d %f\n", buf_size, s->qscale, buf_size*(double)s->qscale);
}
#endif
-
+
+#ifdef HAVE_MMX
+ if(s->codec_id == CODEC_ID_MPEG4 && s->xvid_build && avctx->idct_algo == FF_IDCT_AUTO && (mm_flags & MM_MMX) && !(s->flags&CODEC_FLAG_BITEXACT)){
+ avctx->idct_algo= FF_IDCT_LIBMPEG2MMX;
+ avctx->width= 0; // force reinit
+ }
+#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->width != avctx->width || s->height != avctx->height) {
+
+ if ( s->width != avctx->width || s->height != avctx->height) {
/* H.263 could change picture size any time */
+ ParseContext pc= s->parse_context; //FIXME move these demuxng hack to avformat
+ s->parse_context.buffer=0;
MPV_common_end(s);
- s->context_initialized=0;
+ s->parse_context= pc;
}
if (!s->context_initialized) {
avctx->width = s->width;
avctx->height = s->height;
- avctx->aspect_ratio_info= s->aspect_ratio_info;
- if (s->aspect_ratio_info == FF_ASPECT_EXTENDED)
- {
- avctx->aspected_width = s->aspected_width;
- avctx->aspected_height = s->aspected_height;
- }
- if (MPV_common_init(s) < 0)
- return -1;
- }
- 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;
+ goto retry;
}
+
+ if((s->codec_id==CODEC_ID_H263 || s->codec_id==CODEC_ID_H263P))
+ s->gob_index = ff_h263_get_gob_height(s);
+
+ // 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->num_available_buffers<2 && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
+ if(s->last_picture_ptr==NULL && (s->pict_type==B_TYPE || s->dropable)) return get_consumed_bytes(s, buf_size);
/* skip b frames if we are in a hurry */
- if(s->hurry_up && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
+ 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)
s->next_p_frame_damaged=0;
}
- MPV_frame_start(s, avctx);
+ if(MPV_frame_start(s, avctx) < 0)
+ return -1;
#ifdef DEBUG
printf("qscale=%d\n", s->qscale);
#endif
- /* init resync/ error resilience specific variables */
- s->next_resync_qscale= s->qscale;
- s->next_resync_gb= s->gb;
- if(s->resync_marker) s->mb_num_left= 0;
- else s->mb_num_left= s->mb_num;
+ ff_er_frame_start(s);
+
+ //the second part of the wmv2 header contains the MB skip bits which are stored in current_picture->mb_type
+ //which isnt available before MPV_frame_start()
+ if (s->msmpeg4_version==5){
+ if(ff_wmv2_decode_secondary_picture_header(s) < 0)
+ return -1;
+ }
/* 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;
- for(s->mb_y=0; s->mb_y < s->mb_height; s->mb_y++) {
- /* Check for GOB headers on H.263 */
- /* FIXME: In the future H.263+ will have intra prediction */
- /* and we are gonna need another way to detect MPEG4 */
- if (s->mb_y && !s->h263_pred) {
- s->first_slice_line = h263_decode_gob_header(s);
+ s->mb_x=0;
+ s->mb_y=0;
+
+ decode_slice(s);
+ while(s->mb_y<s->mb_height){
+ if(s->msmpeg4_version){
+ if(s->mb_x!=0 || (s->mb_y%s->slice_height)!=0 || get_bits_count(&s->gb) > s->gb.size_in_bits)
+ break;
+ }else{
+ if(ff_h263_resync(s)<0)
+ break;
}
- if(s->msmpeg4_version==1){
- s->last_dc[0]=
- s->last_dc[1]=
- s->last_dc[2]= 128;
- }
-
- s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
- s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
-
- s->block_index[0]= s->block_wrap[0]*(s->mb_y*2 + 1) - 1;
- s->block_index[1]= s->block_wrap[0]*(s->mb_y*2 + 1);
- s->block_index[2]= s->block_wrap[0]*(s->mb_y*2 + 2) - 1;
- s->block_index[3]= s->block_wrap[0]*(s->mb_y*2 + 2);
- s->block_index[4]= s->block_wrap[4]*(s->mb_y + 1) + s->block_wrap[0]*(s->mb_height*2 + 2);
- s->block_index[5]= s->block_wrap[4]*(s->mb_y + 1 + s->mb_height + 2) + s->block_wrap[0]*(s->mb_height*2 + 2);
- for(s->mb_x=0; s->mb_x < s->mb_width; s->mb_x++) {
- s->block_index[0]+=2;
- s->block_index[1]+=2;
- s->block_index[2]+=2;
- s->block_index[3]+=2;
- s->block_index[4]++;
- s->block_index[5]++;
-#ifdef DEBUG
- printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y);
-#endif
-
- if(s->resync_marker){
- if(s->mb_num_left<=0){
- /* except the first block */
- if(s->mb_x!=0 || s->mb_y!=0){
- /* did we miss the next resync marker without noticing an error yet */
- if(((get_bits_count(&s->gb)+8)&(~7)) != s->next_resync_pos && s->decoding_error==0){
- fprintf(stderr, "slice end missmatch x:%d y:%d %d %d\n",
- s->mb_x, s->mb_y, get_bits_count(&s->gb), s->next_resync_pos);
- ff_conceal_past_errors(s, 1);
- }
- }
- s->qscale= s->next_resync_qscale;
- s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
- s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
-
- s->gb= s->next_resync_gb;
- s->resync_mb_x= s->mb_x; //we know that the marker is here cuz mb_num_left was the distance to it
- s->resync_mb_y= s->mb_y;
- s->first_slice_line=1;
-
- if(s->codec_id==CODEC_ID_MPEG4){
- ff_mpeg4_clean_buffers(s);
- ff_mpeg4_resync(s);
- }
- }
-
- if( s->resync_mb_x==s->mb_x
- && s->resync_mb_y==s->mb_y && s->decoding_error!=0){
- fprintf(stderr, "resynced at %d %d\n", s->mb_x, s->mb_y);
- s->decoding_error= 0;
- }
- }
+ if(s->msmpeg4_version<4 && s->h263_pred)
+ ff_mpeg4_clean_buffers(s);
- //fprintf(stderr,"\nFrame: %d\tMB: %d",avctx->frame_number, (s->mb_y * s->mb_width) + s->mb_x);
- /* DCT & quantize */
- if(s->decoding_error!=DECODING_DESYNC){
- int last_error= s->decoding_error;
- clear_blocks(s->block[0]);
-
- s->mv_dir = MV_DIR_FORWARD;
- s->mv_type = MV_TYPE_16X16;
- if (s->h263_msmpeg4) {
- if (msmpeg4_decode_mb(s, s->block) < 0) {
- fprintf(stderr,"Error at MB: %d\n", (s->mb_y * s->mb_width) + s->mb_x);
- s->decoding_error=DECODING_DESYNC;
- }
- } else {
- if (h263_decode_mb(s, s->block) < 0) {
- fprintf(stderr,"Error at MB: %d\n", (s->mb_y * s->mb_width) + s->mb_x);
- s->decoding_error=DECODING_DESYNC;
- }
- }
-
- if(s->decoding_error!=last_error){
- ff_conceal_past_errors(s, 0);
- }
- }
-
- /* conceal errors */
- if( s->decoding_error==DECODING_DESYNC
- || (s->decoding_error==DECODING_ACDC_LOST && s->mb_intra)){
- s->mv_dir = MV_DIR_FORWARD;
- s->mv_type = MV_TYPE_16X16;
- s->mb_skiped=0;
- s->mb_intra=0;
- s->mv[0][0][0]=0; //FIXME this is not optimal
- s->mv[0][0][1]=0;
- clear_blocks(s->block[0]);
- }else if(s->decoding_error && !s->mb_intra){
- clear_blocks(s->block[0]);
- }
- //FIXME remove AC for intra
-
- MPV_decode_mb(s, s->block);
-
- s->mb_num_left--;
- }
- if ( avctx->draw_horiz_band
- && (s->num_available_buffers>=1 || (!s->has_b_frames)) ) {
- UINT8 *src_ptr[3];
- int y, h, offset;
- y = s->mb_y * 16;
- h = s->height - y;
- if (h > 16)
- h = 16;
- offset = y * s->linesize;
- if(s->pict_type==B_TYPE || (!s->has_b_frames)){
- src_ptr[0] = s->current_picture[0] + offset;
- src_ptr[1] = s->current_picture[1] + (offset >> 2);
- src_ptr[2] = s->current_picture[2] + (offset >> 2);
- } else {
- src_ptr[0] = s->last_picture[0] + offset;
- src_ptr[1] = s->last_picture[1] + (offset >> 2);
- src_ptr[2] = s->last_picture[2] + (offset >> 2);
- }
- avctx->draw_horiz_band(avctx, src_ptr, s->linesize,
- y, s->width, h);
- }
+ decode_slice(s);
}
-
+
if (s->h263_msmpeg4 && s->msmpeg4_version<4 && s->pict_type==I_TYPE)
- if(msmpeg4_decode_ext_header(s, buf_size) < 0) return -1;
+ 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){
+ if(s->codec_id==CODEC_ID_MPEG4 && s->bitstream_buffer_size==0 && s->divx_packed){
int current_pos= get_bits_count(&s->gb)>>3;
+ int startcode_found=0;
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->bitstream_buffer_size==0 && s->error_resilience>0){
- int left= s->gb.size*8 - get_bits_count(&s->gb);
- int max_extra=8;
-
- if(s->codec_id==CODEC_ID_MPEG4) max_extra+=32;
-
- if(left>max_extra){
- fprintf(stderr, "discarding %d junk bits at end, next would be %X\n", left, show_bits(&s->gb, 24));
- if(s->decoding_error==0)
- ff_conceal_past_errors(s, 1);
+ if(s->gb.buffer == s->bitstream_buffer && buf_size>20){ //xvid style
+ startcode_found=1;
+ current_pos=0;
}
- if(left<0){
- fprintf(stderr, "overreading %d bits\n", -left);
- if(s->decoding_error==0)
- ff_conceal_past_errors(s, 1);
+
+ if(startcode_found){
+ memcpy(s->bitstream_buffer, buf + current_pos, buf_size - current_pos);
+ s->bitstream_buffer_size= buf_size - current_pos;
}
}
-
+
+ ff_er_frame_end(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[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->has_b_frames)){
- pict->data[0] = s->current_picture[0];
- pict->data[1] = s->current_picture[1];
- pict->data[2] = s->current_picture[2];
+assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);
+assert(s->current_picture.pict_type == s->pict_type);
+ if(s->pict_type==B_TYPE || s->low_delay){
+ *pict= *(AVFrame*)&s->current_picture;
+ ff_print_debug_info(s, pict);
} else {
- pict->data[0] = s->last_picture[0];
- pict->data[1] = s->last_picture[1];
- pict->data[2] = s->last_picture[2];
+ *pict= *(AVFrame*)&s->last_picture;
+ if(pict)
+ ff_print_debug_info(s, pict);
}
- pict->linesize[0] = s->linesize;
- pict->linesize[1] = s->uvlinesize;
- pict->linesize[2] = s->uvlinesize;
-
- avctx->quality = s->qscale;
/* 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
- note we allready added +1 for the current pix in MPV_frame_end(s) */
- if(s->num_available_buffers>=2 || (!s->has_b_frames))
- *data_size = sizeof(AVPicture);
+ /* dont output the last pic after seeking */
+ if(s->last_picture_ptr || s->low_delay)
+ *data_size = sizeof(AVFrame);
#ifdef PRINT_FRAME_TIME
printf("%Ld\n", rdtsc()-time);
#endif
+
return get_consumed_bytes(s, buf_size);
}
+static const AVOption mpeg4_decoptions[] =
+{
+ AVOPTION_SUB(avoptions_workaround_bug),
+ AVOPTION_END()
+};
+
AVCodec mpeg4_decoder = {
"mpeg4",
CODEC_TYPE_VIDEO,
CODEC_ID_MPEG4,
sizeof(MpegEncContext),
- h263_decode_init,
+ ff_h263_decode_init,
NULL,
- h263_decode_end,
- h263_decode_frame,
- CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
+ ff_h263_decode_end,
+ ff_h263_decode_frame,
+ CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
+ .options = mpeg4_decoptions,
+ .flush= ff_mpeg_flush,
};
AVCodec h263_decoder = {
CODEC_TYPE_VIDEO,
CODEC_ID_H263,
sizeof(MpegEncContext),
- h263_decode_init,
+ ff_h263_decode_init,
NULL,
- h263_decode_end,
- h263_decode_frame,
- CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
+ ff_h263_decode_end,
+ ff_h263_decode_frame,
+ CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
+ .flush= ff_mpeg_flush,
};
AVCodec msmpeg4v1_decoder = {
CODEC_TYPE_VIDEO,
CODEC_ID_MSMPEG4V1,
sizeof(MpegEncContext),
- h263_decode_init,
+ ff_h263_decode_init,
NULL,
- h263_decode_end,
- h263_decode_frame,
+ ff_h263_decode_end,
+ ff_h263_decode_frame,
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
+ mpeg4_decoptions,
};
AVCodec msmpeg4v2_decoder = {
CODEC_TYPE_VIDEO,
CODEC_ID_MSMPEG4V2,
sizeof(MpegEncContext),
- h263_decode_init,
+ ff_h263_decode_init,
NULL,
- h263_decode_end,
- h263_decode_frame,
+ ff_h263_decode_end,
+ ff_h263_decode_frame,
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
+ mpeg4_decoptions,
};
AVCodec msmpeg4v3_decoder = {
CODEC_TYPE_VIDEO,
CODEC_ID_MSMPEG4V3,
sizeof(MpegEncContext),
- h263_decode_init,
+ ff_h263_decode_init,
NULL,
- h263_decode_end,
- h263_decode_frame,
+ ff_h263_decode_end,
+ ff_h263_decode_frame,
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
+ .options = mpeg4_decoptions,
};
AVCodec wmv1_decoder = {
CODEC_TYPE_VIDEO,
CODEC_ID_WMV1,
sizeof(MpegEncContext),
- h263_decode_init,
+ ff_h263_decode_init,
NULL,
- h263_decode_end,
- h263_decode_frame,
+ ff_h263_decode_end,
+ ff_h263_decode_frame,
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
+ mpeg4_decoptions,
};
-AVCodec wmv2_decoder = {
- "wmv2",
+AVCodec h263i_decoder = {
+ "h263i",
CODEC_TYPE_VIDEO,
- CODEC_ID_WMV2,
+ CODEC_ID_H263I,
sizeof(MpegEncContext),
- h263_decode_init,
+ ff_h263_decode_init,
NULL,
- h263_decode_end,
- h263_decode_frame,
+ ff_h263_decode_end,
+ ff_h263_decode_frame,
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
+ mpeg4_decoptions,
};
-AVCodec h263i_decoder = {
- "h263i",
+AVCodec flv_decoder = {
+ "flv",
CODEC_TYPE_VIDEO,
- CODEC_ID_H263I,
+ CODEC_ID_FLV1,
sizeof(MpegEncContext),
- h263_decode_init,
+ ff_h263_decode_init,
NULL,
- h263_decode_end,
- h263_decode_frame,
- CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
+ ff_h263_decode_end,
+ ff_h263_decode_frame,
+ CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1
};
+AVCodecParser h263_parser = {
+ { CODEC_ID_H263 },
+ sizeof(ParseContext),
+ NULL,
+ h263_parse,
+ ff_parse_close,
+};
projects / ffmpeg / blobdiff