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h264: switch from qatars has_b_frames calculation back to mine. 

Their 2nd try does like the first not work at all.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-12-10 17:33:54 +01:00
parent 257c85cddd
commit 5b2873c1d5
2 changed files with 31 additions and 68 deletions
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97
libavcodec/h264.c
View File

@ -1382,7 +1382,6 @@ static void decode_postinit(H264Context *h, int setup_finished){
Picture *out = s->current_picture_ptr;
Picture *cur = s->current_picture_ptr;
int i, pics, out_of_order, out_idx;
int invalid = 0, cnt = 0;
s->current_picture_ptr->f.qscale_type = FF_QSCALE_TYPE_H264;
s->current_picture_ptr->f.pict_type = s->pict_type;
@ -1461,6 +1460,8 @@ static void decode_postinit(H264Context *h, int setup_finished){
}
}
cur->mmco_reset = h->mmco_reset;
h->mmco_reset = 0;
//FIXME do something with unavailable reference frames
/* Sort B-frames into display order */
@ -1477,6 +1478,25 @@ static void decode_postinit(H264Context *h, int setup_finished){
s->low_delay= 0;
}
for (i = 0; 1; i++) {
if(i == MAX_DELAYED_PIC_COUNT || cur->poc < h->last_pocs[i]){
if(i)
h->last_pocs[i-1] = cur->poc;
break;
} else if(i) {
h->last_pocs[i-1]= h->last_pocs[i];
}
}
out_of_order = MAX_DELAYED_PIC_COUNT - i;
if( cur->f.pict_type == AV_PICTURE_TYPE_B
|| (h->last_pocs[MAX_DELAYED_PIC_COUNT-2] > INT_MIN && h->last_pocs[MAX_DELAYED_PIC_COUNT-1] - h->last_pocs[MAX_DELAYED_PIC_COUNT-2] > 2))
out_of_order = FFMAX(out_of_order, 1);
if(s->avctx->has_b_frames < out_of_order && !h->sps.bitstream_restriction_flag){
av_log(s->avctx, AV_LOG_WARNING, "Increasing reorder buffer to %d\n", out_of_order);
s->avctx->has_b_frames = out_of_order;
s->low_delay = 0;
}
pics = 0;
while(h->delayed_pic[pics]) pics++;
@ -1486,87 +1506,30 @@ static void decode_postinit(H264Context *h, int setup_finished){
if (cur->f.reference == 0)
cur->f.reference = DELAYED_PIC_REF;
/* Frame reordering. This code takes pictures from coding order and sorts
* them by their incremental POC value into display order. It supports POC
* gaps, MMCO reset codes and random resets.
* A "display group" can start either with a IDR frame (f.key_frame = 1),
* and/or can be closed down with a MMCO reset code. In sequences where
* there is no delay, we can't detect that (since the frame was already
* output to the user), so we also set h->mmco_reset to detect the MMCO
* reset code.
* FIXME: if we detect insufficient delays (as per s->avctx->has_b_frames),
* we increase the delay between input and output. All frames affected by
* the lag (e.g. those that should have been output before another frame
* that we already returned to the user) will be dropped. This is a bug
* that we will fix later. */
for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++) {
cnt += out->poc < h->last_pocs[i];
invalid += out->poc == INT_MIN;
}
if (!h->mmco_reset && !cur->f.key_frame && cnt + invalid == MAX_DELAYED_PIC_COUNT && cnt > 0) {
h->mmco_reset = 2;
if (pics > 1)
h->delayed_pic[pics - 2]->mmco_reset = 2;
}
if (h->mmco_reset || cur->f.key_frame) {
for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
h->last_pocs[i] = INT_MIN;
cnt = 0;
invalid = MAX_DELAYED_PIC_COUNT;
}
out = h->delayed_pic[0];
out_idx = 0;
for (i = 1; i < MAX_DELAYED_PIC_COUNT && h->delayed_pic[i] &&
!h->delayed_pic[i-1]->mmco_reset && !h->delayed_pic[i]->f.key_frame; i++)
{
for (i = 1; h->delayed_pic[i] && !h->delayed_pic[i]->f.key_frame && !h->delayed_pic[i]->mmco_reset; i++)
if(h->delayed_pic[i]->poc < out->poc){
out = h->delayed_pic[i];
out_idx = i;
}
}
if (s->avctx->has_b_frames == 0 && (h->delayed_pic[0]->f.key_frame || h->mmco_reset))
h->next_outputed_poc = INT_MIN;
out_of_order = !out->f.key_frame && !h->mmco_reset && (out->poc < h->next_outputed_poc);
if (s->avctx->has_b_frames == 0 && (h->delayed_pic[0]->f.key_frame || h->delayed_pic[0]->mmco_reset))
h->next_outputed_poc= INT_MIN;
out_of_order = out->poc < h->next_outputed_poc;
if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames >= h->sps.num_reorder_frames)
{ }
else if (out_of_order && pics-1 == s->avctx->has_b_frames &&
s->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT) {
if (invalid + cnt < MAX_DELAYED_PIC_COUNT) {
if(cnt > s->avctx->has_b_frames)
av_log(s->avctx, AV_LOG_WARNING, "Increasing reorder buffer to %d\n", cnt);
s->avctx->has_b_frames = FFMAX(s->avctx->has_b_frames, cnt);
}
s->low_delay = 0;
} else if (s->low_delay &&
((h->next_outputed_poc != INT_MIN && out->poc > h->next_outputed_poc + 2) ||
cur->f.pict_type == AV_PICTURE_TYPE_B)) {
s->low_delay = 0;
s->avctx->has_b_frames++;
}
if(pics > s->avctx->has_b_frames){
if(out_of_order || pics > s->avctx->has_b_frames){
out->f.reference &= ~DELAYED_PIC_REF;
out->owner2 = s; // for frame threading, the owner must be the second field's thread
// or else the first thread can release the picture and reuse it unsafely
for(i=out_idx; h->delayed_pic[i]; i++)
h->delayed_pic[i] = h->delayed_pic[i+1];
}
memmove(h->last_pocs, &h->last_pocs[1], sizeof(*h->last_pocs) * (MAX_DELAYED_PIC_COUNT - 1));
h->last_pocs[MAX_DELAYED_PIC_COUNT - 1] = cur->poc;
if(!out_of_order && pics > s->avctx->has_b_frames){
h->next_output_pic = out;
if (out->mmco_reset) {
if (out_idx > 0) {
h->next_outputed_poc = out->poc;
h->delayed_pic[out_idx - 1]->mmco_reset = out->mmco_reset;
} else {
h->next_outputed_poc = INT_MIN;
}
} else {
if (out_idx == 0 && h->delayed_pic[0] && (h->delayed_pic[0]->f.key_frame || h->delayed_pic[0]->mmco_reset)) {
h->next_outputed_poc = INT_MIN;
} else
h->next_outputed_poc = out->poc;
}
h->mmco_reset = 0;
}else{
av_log(s->avctx, AV_LOG_DEBUG, "no picture\n");
}
@ -2425,8 +2388,6 @@ static void flush_dpb(AVCodecContext *avctx){
h->delayed_pic[i]->f.reference = 0;
h->delayed_pic[i]= NULL;
}
for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
h->last_pocs[i] = INT_MIN;
h->outputed_poc=h->next_outputed_poc= INT_MIN;
h->prev_interlaced_frame = 1;
idr(h);

2
libavcodec/h264_refs.c
View File

@ -586,6 +586,8 @@ int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){
s->current_picture_ptr->frame_num= 0;
h->mmco_reset = 1;
s->current_picture_ptr->mmco_reset=1;
for (j = 0; j < MAX_DELAYED_PIC_COUNT; j++)
h->last_pocs[j] = INT_MIN;
break;
default: assert(0);
}