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h264: only allow ending a field/starting a new one before finish_setup() 

Doing this after ff_thread_finish_setup() is called is invalid and can
conflict with reads from the other thread.
This commit is contained in:
Anton Khirnov 2016-05-17 18:57:23 +02:00
parent debca90863
commit 17e7c03e12
1 changed files with 19 additions and 15 deletions
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6
libavcodec/h264_slice.c
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@ -1381,6 +1381,7 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl,
if (ret < 0)
return ret;
if (!h->setup_finished) {
if (sl->first_mb_addr == 0) { // FIXME better field boundary detection
if (h->current_slice && h->cur_pic_ptr && FIELD_PICTURE(h)) {
ff_h264_field_end(h, sl, 1);
@ -1400,7 +1401,10 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl,
ret = h264_field_start(h, sl, nal);
if (ret < 0)
return ret;
} else {
}
}
if (h->current_slice > 0) {
if (h->ps.pps != (const PPS*)h->ps.pps_list[sl->pps_id]->data) {
av_log(h->avctx, AV_LOG_ERROR, "PPS changed between slices\n");
return AVERROR_INVALIDDATA;