--- /dev/null
+/*
+ * H.263 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
+ */
+
+/**
+ * @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
+
+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;
+ case CODEC_ID_FLV1:
+ s->h263_flv = 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_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 ;)
+
+ return pos;
+ }
+}
+
+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;
+
+ 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 were 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){
+ 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);
+
+//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){
+ fprintf(stderr,"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;
+ }
+ fprintf(stderr,"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);
+ }
+
+ 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){
+ 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
+ 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;
+ }
+
+ fprintf(stderr, "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
+ */
+static int mpeg4_find_frame_end(MpegEncContext *s, uint8_t *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;
+ }
+ }
+ }
+
+ if(vop_found){
+ 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(MpegEncContext *s, uint8_t *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>>(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;
+}
+
+int ff_h263_decode_frame(AVCodecContext *avctx,
+ void *data, int *data_size,
+ uint8_t *buf, int buf_size)
+{
+ MpegEncContext *s = avctx->priv_data;
+ int ret;
+ 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) {
+ /* 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->flags&CODEC_FLAG_TRUNCATED){
+ int next;
+
+ if(s->codec_id==CODEC_ID_MPEG4){
+ next= mpeg4_find_frame_end(s, buf, buf_size);
+ }else if(s->codec_id==CODEC_ID_H263){
+ next= h263_find_frame_end(s, buf, buf_size);
+ }else{
+ fprintf(stderr, "this codec doesnt support truncated bitstreams\n");
+ return -1;
+ }
+
+ if( ff_combine_frame(s, next, &buf, &buf_size) < 0 )
+ return buf_size;
+ }
+
+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*8);
+ }else
+ 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;
+ }
+
+ /* 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*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->h263_intel) {
+ 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);
+ }
+
+ 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;
+ }
+
+ 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;
+ s->workaround_bugs|= FF_BUG_AC_VLC;
+ }
+
+ 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;
+
+#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<4618){
+ s->workaround_bugs|= FF_BUG_EDGE;
+ }
+
+ 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 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)
+ printf("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;
+ 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);
+ }
+ 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);
+
+ // 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_ptr==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
+
+ 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->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<4 && s->h263_pred)
+ ff_mpeg4_clean_buffers(s);
+
+ 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){
+ 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_packed){
+ 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;
+ }
+ }
+ }
+
+ ff_er_frame_end(s);
+
+ MPV_frame_end(s);
+
+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, s->current_picture_ptr);
+ } else {
+ *pict= *(AVFrame*)&s->last_picture;
+ ff_print_debug_info(s, s->last_picture_ptr);
+ }
+
+ /* 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_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),
+ ff_h263_decode_init,
+ NULL,
+ 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 = {
+ "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 | CODEC_CAP_TRUNCATED,
+ .flush= ff_mpeg_flush,
+};
+
+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,
+ mpeg4_decoptions,
+};
+
+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,
+ mpeg4_decoptions,
+};
+
+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,
+ .options = mpeg4_decoptions,
+};
+
+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,
+ mpeg4_decoptions,
+};
+
+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,
+ mpeg4_decoptions,
+};
+
+AVCodec flv_decoder = {
+ "flv",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_FLV1,
+ sizeof(MpegEncContext),
+ ff_h263_decode_init,
+ NULL,
+ ff_h263_decode_end,
+ ff_h263_decode_frame,
+ CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1
+};
projects / synfig.git / blobdiff