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b frames + cbr fix 

Originally committed as revision 2730 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-01-29 15:50:54 +00:00
parent 8fd19ab286
commit 2c8b796fa9
1 changed files with 46 additions and 43 deletions
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89
libavcodec/mpegvideo.c
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@ -1939,53 +1939,56 @@ int MPV_encode_picture(AVCodecContext *avctx,
for(i=0; i<4; i++){
avctx->error[i] += s->current_picture_ptr->error[i];
}
}
flush_put_bits(&s->pb);
s->frame_bits = (pbBufPtr(&s->pb) - s->pb.buf) * 8;
stuffing_count= ff_vbv_update(s, s->frame_bits);
if(stuffing_count){
switch(s->codec_id){
case CODEC_ID_MPEG1VIDEO:
case CODEC_ID_MPEG2VIDEO:
while(stuffing_count--){
put_bits(&s->pb, 8, 0);
}
break;
case CODEC_ID_MPEG4:
put_bits(&s->pb, 16, 0);
put_bits(&s->pb, 16, 0x1C3);
stuffing_count -= 4;
while(stuffing_count--){
put_bits(&s->pb, 8, 0xFF);
}
break;
default:
av_log(s->avctx, AV_LOG_ERROR, "vbv buffer overflow\n");
}
flush_put_bits(&s->pb);
s->frame_bits = (pbBufPtr(&s->pb) - s->pb.buf) * 8;
stuffing_count= ff_vbv_update(s, s->frame_bits);
if(stuffing_count){
switch(s->codec_id){
case CODEC_ID_MPEG1VIDEO:
case CODEC_ID_MPEG2VIDEO:
while(stuffing_count--){
put_bits(&s->pb, 8, 0);
}
break;
case CODEC_ID_MPEG4:
put_bits(&s->pb, 16, 0);
put_bits(&s->pb, 16, 0x1C3);
stuffing_count -= 4;
while(stuffing_count--){
put_bits(&s->pb, 8, 0xFF);
}
break;
default:
av_log(s->avctx, AV_LOG_ERROR, "vbv buffer overflow\n");
}
flush_put_bits(&s->pb);
s->frame_bits = (pbBufPtr(&s->pb) - s->pb.buf) * 8;
}
/* update mpeg1/2 vbv_delay for CBR */
if(s->avctx->rc_max_rate && s->avctx->rc_min_rate == s->avctx->rc_max_rate){
int vbv_delay;
assert(s->repeat_first_field==0);
vbv_delay= lrintf(90000 * s->rc_context.buffer_index / s->avctx->rc_max_rate);
assert(vbv_delay < 0xFFFF);
s->vbv_delay_ptr[0] &= 0xF8;
s->vbv_delay_ptr[0] |= vbv_delay>>13;
s->vbv_delay_ptr[1] = vbv_delay>>5;
s->vbv_delay_ptr[2] &= 0x07;
s->vbv_delay_ptr[2] |= vbv_delay<<3;
}
s->total_bits += s->frame_bits;
avctx->frame_bits = s->frame_bits;
}else{
assert((pbBufPtr(&s->pb) == s->pb.buf));
s->frame_bits=0;
}
/* update mpeg1/2 vbv_delay for CBR */
if(s->avctx->rc_max_rate && s->avctx->rc_min_rate == s->avctx->rc_max_rate){
int vbv_delay;
assert(s->repeat_first_field==0);
vbv_delay= lrintf(90000 * s->rc_context.buffer_index / s->avctx->rc_max_rate);
assert(vbv_delay < 0xFFFF);
s->vbv_delay_ptr[0] &= 0xF8;
s->vbv_delay_ptr[0] |= vbv_delay>>13;
s->vbv_delay_ptr[1] = vbv_delay>>5;
s->vbv_delay_ptr[2] &= 0x07;
s->vbv_delay_ptr[2] |= vbv_delay<<3;
}
s->total_bits += s->frame_bits;
avctx->frame_bits = s->frame_bits;
assert((s->frame_bits&7)==0);
return s->frame_bits/8;
}