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Code Issues Releases Activity

hwcontext: Add frame context mapping for nontrivial contexts

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Some frames contexts are not usable without additional format-specific
state in hwctx.  This change adds new functions frames_derive_from and
frames_derive_to to initialise this state appropriately when deriving
a frames context which will require it to be set.
This commit is contained in:
Mark Thompson
2017-03-04 23:57:39 +00:00
parent aa51bb3d27
commit 27978155bc
2 changed files with 13 additions and 1 deletions
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9
libavutil/hwcontext.c
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@@ -816,7 +816,14 @@ int av_hwframe_ctx_create_derived(AVBufferRef **derived_frame_ctx,
goto fail;
}
ret = av_hwframe_ctx_init(dst_ref);
ret = AVERROR(ENOSYS);
if (src->internal->hw_type->frames_derive_from)
ret = src->internal->hw_type->frames_derive_from(dst, src, flags);
if (ret == AVERROR(ENOSYS) &&
dst->internal->hw_type->frames_derive_to)
ret = dst->internal->hw_type->frames_derive_to(dst, src, flags);
if (ret == AVERROR(ENOSYS))
ret = 0;
if (ret)
goto fail;