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fftools/ffmpeg: make sure FrameData is writable when we modify it

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Also, add a function that returns const FrameData* for cases that only
read from it.
This commit is contained in:
Anton Khirnov
2023-11-13 09:35:44 +01:00
parent 1d536e0283
commit 99d2fa38ad
3 changed files with 21 additions and 6 deletions
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21
fftools/ffmpeg.c
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@@ -427,21 +427,34 @@ InputStream *ist_iter(InputStream *prev)
return NULL;
}
FrameData *frame_data(AVFrame *frame)
static int frame_data_ensure(AVFrame *frame, int writable)
{
if (!frame->opaque_ref) {
FrameData *fd;
frame->opaque_ref = av_buffer_allocz(sizeof(*fd));
if (!frame->opaque_ref)
return NULL;
return AVERROR(ENOMEM);
fd = (FrameData*)frame->opaque_ref->data;
fd->dec.frame_num = UINT64_MAX;
fd->dec.pts = AV_NOPTS_VALUE;
}
} else if (writable)
return av_buffer_make_writable(&frame->opaque_ref);
return (FrameData*)frame->opaque_ref->data;
return 0;
}
FrameData *frame_data(AVFrame *frame)
{
int ret = frame_data_ensure(frame, 1);
return ret < 0 ? NULL : (FrameData*)frame->opaque_ref->data;
}
const FrameData *frame_data_c(AVFrame *frame)
{
int ret = frame_data_ensure(frame, 0);
return ret < 0 ? NULL : (const FrameData*)frame->opaque_ref->data;
}
void remove_avoptions(AVDictionary **a, AVDictionary *b)