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avcodec/ffv1dec: reorganize thread init/update

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This moves some allocations to init, reducing possible failure modes in update.
Always copies from the previous context instead of just during init

Fixes Ticket2923

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-09-01 22:38:43 +02:00
parent c72cca5a44
commit 21dc3a3cc2
1 changed files with 46 additions and 15 deletions
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61
libavcodec/ffv1dec.c
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@ -942,7 +942,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPac
static int init_thread_copy(AVCodecContext *avctx)
{
FFV1Context *f = avctx->priv_data;
int i;
int i, ret;
f->picture.f = NULL;
f->last_picture.f = NULL;
@ -955,9 +955,43 @@ static int init_thread_copy(AVCodecContext *avctx)
f->context_count[i] * sizeof(*f->initial_states[i]));
}
f->picture.f = av_frame_alloc();
f->last_picture.f = av_frame_alloc();
if ((ret = ffv1_init_slice_contexts(f)) < 0)
return ret;
return 0;
}
static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
{
fsdst->version = fsrc->version;
fsdst->micro_version = fsrc->micro_version;
fsdst->chroma_planes = fsrc->chroma_planes;
fsdst->chroma_h_shift = fsrc->chroma_h_shift;
fsdst->chroma_v_shift = fsrc->chroma_v_shift;
fsdst->transparency = fsrc->transparency;
fsdst->plane_count = fsrc->plane_count;
fsdst->ac = fsrc->ac;
fsdst->colorspace = fsrc->colorspace;
fsdst->ec = fsrc->ec;
fsdst->intra = fsrc->intra;
fsdst->slice_damaged = fssrc->slice_damaged;
fsdst->key_frame_ok = fsrc->key_frame_ok;
fsdst->bits_per_raw_sample = fsrc->bits_per_raw_sample;
fsdst->packed_at_lsb = fsrc->packed_at_lsb;
fsdst->slice_count = fsrc->slice_count;
if (fsrc->version<3){
fsdst->slice_x = fssrc->slice_x;
fsdst->slice_y = fssrc->slice_y;
fsdst->slice_width = fssrc->slice_width;
fsdst->slice_height = fssrc->slice_height;
}
}
static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
{
FFV1Context *fsrc = src->priv_data;
@ -967,33 +1001,30 @@ static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
if (dst == src)
return 0;
if (!fdst->picture.f) {
{
FFV1Context bak = *fdst;
memcpy(fdst, fsrc, sizeof(*fdst));
memcpy(fdst->initial_states, bak.initial_states, sizeof(fdst->initial_states));
fdst->picture.f = av_frame_alloc();
fdst->last_picture.f = av_frame_alloc();
if ((ret = ffv1_init_slice_contexts(fdst)) < 0)
return ret;
memcpy(fdst->slice_context, bak.slice_context , sizeof(fdst->slice_context));
fdst->picture = bak.picture;
fdst->last_picture = bak.last_picture;
for (i = 0; i<fdst->num_h_slices * fdst->num_v_slices; i++) {
FFV1Context *fssrc = fsrc->slice_context[i];
FFV1Context *fsdst = fdst->slice_context[i];
copy_fields(fsdst, fssrc, fsrc);
}
av_assert0(!fdst->plane[0].state);
av_assert0(!fdst->sample_buffer);
}
av_assert1(fdst->slice_count == fsrc->slice_count);
fdst->key_frame_ok = fsrc->key_frame_ok;
ff_thread_release_buffer(dst, &fdst->picture);
if (fsrc->picture.f->data[0]) {
if ((ret = ff_thread_ref_frame(&fdst->picture, &fsrc->picture)) < 0)
return ret;
}
for (i = 0; i < fdst->slice_count; i++) {
FFV1Context *fsdst = fdst->slice_context[i];
FFV1Context *fssrc = fsrc->slice_context[i];
fsdst->slice_damaged = fssrc->slice_damaged;
}
fdst->fsrc = fsrc;