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mp_image: pass through unknown AVFrame side data

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Useful for libavfilter. Somewhat risky, because we can't ensure the
consistency of the unknown side data (but this is a general problem with
side data, and libavfilter filters will usually get it wrong too _if_
there are conflict cases).

Fixes #5569.
This commit is contained in:
wm4 2018-03-01 13:58:15 +01:00 committed by Jan Ekström
parent 9daa842b5f
commit 55c88fdb8f
2 changed files with 42 additions and 1 deletions
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35
video/mp_image.c
View File

@ -209,6 +209,9 @@ static void mp_image_destructor(void *ptr)
av_buffer_unref(&mpi->hwctx);
av_buffer_unref(&mpi->icc_profile);
av_buffer_unref(&mpi->a53_cc);
for (int n = 0; n < mpi->num_ff_side_data; n++)
av_buffer_unref(&mpi->ff_side_data[n].buf);
talloc_free(mpi->ff_side_data);
}
int mp_chroma_div_up(int size, int shift)
@ -329,6 +332,10 @@ struct mp_image *mp_image_new_ref(struct mp_image *img)
fail |= !ref_buffer(&new->icc_profile);
fail |= !ref_buffer(&new->a53_cc);
new->ff_side_data = talloc_memdup(NULL, new->ff_side_data,
new->num_ff_side_data * sizeof(new->ff_side_data[0]));
for (int n = 0; n < new->num_ff_side_data; n++)
fail |= !ref_buffer(&new->ff_side_data[n].buf);
if (!fail)
return new;
@ -897,6 +904,15 @@ struct mp_image *mp_image_from_av_frame(struct AVFrame *src)
sd = av_frame_get_side_data(src, AV_FRAME_DATA_A53_CC);
if (sd)
dst->a53_cc = sd->buf;
for (int n = 0; n < src->nb_side_data; n++) {
sd = src->side_data[n];
struct mp_ff_side_data mpsd = {
.type = sd->type,
.buf = sd->buf,
};
MP_TARRAY_APPEND(NULL, dst->ff_side_data, dst->num_ff_side_data, mpsd);
}
#endif
if (dst->hwctx) {
@ -908,7 +924,12 @@ struct mp_image *mp_image_from_av_frame(struct AVFrame *src)
fns->complete_image_params(dst);
}
return mp_image_new_ref(dst);
struct mp_image *res = mp_image_new_ref(dst);
// Allocated, but non-refcounted data.
talloc_free(dst->ff_side_data);
return res;
}
@ -981,6 +1002,18 @@ struct AVFrame *mp_image_to_av_frame(struct mp_image *src)
abort();
clm->MaxCLL = src->params.color.sig_peak * MP_REF_WHITE;
}
// Add back side data, but only for types which are not specially handled
// above. Keep in mind that the types above will be out of sync anyway.
for (int n = 0; n < new_ref->num_ff_side_data; n++) {
struct mp_ff_side_data *mpsd = &new_ref->ff_side_data[n];
if (!av_frame_get_side_data(dst, mpsd->type)) {
AVFrameSideData *sd = ffmpeg_garbage(dst, mpsd->type, mpsd->buf);
if (!sd)
abort();
mpsd->buf = NULL;
}
}
#endif
talloc_free(new_ref);

8
video/mp_image.h
View File

@ -121,8 +121,16 @@ typedef struct mp_image {
struct AVBufferRef *icc_profile;
// Closed captions packet, if any (only after decoder)
struct AVBufferRef *a53_cc;
// Other side data we don't care about.
struct mp_ff_side_data *ff_side_data;
int num_ff_side_data;
} mp_image_t;
struct mp_ff_side_data {
int type;
struct AVBufferRef *buf;
};
int mp_chroma_div_up(int size, int shift);
int mp_image_get_alloc_size(int imgfmt, int w, int h, int stride_align);