Some frames contexts are not usable without additional format-specific
state in hwctx. This adds new functions map_frames_from and
map_frames_to to set this up appropriately when deriving a frames
context which will require it to be set.
---
libavutil/hwcontext.c | 9 ++++++++-
libavutil/hwcontext_internal.h | 5 +++++
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/libavutil/hwcontext.c b/libavutil/hwcontext.c
index 8195a7245..4a47e258a 100644
--- a/libavutil/hwcontext.c
+++ b/libavutil/hwcontext.c
@@ -820,7 +820,14 @@ 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->map_frames_from)
+ ret = src->internal->hw_type->map_frames_from(dst, src, flags);
+ if (ret == AVERROR(ENOSYS) &&
+ dst->internal->hw_type->map_frames_to)
+ ret = dst->internal->hw_type->map_frames_to(dst, src, flags);
+ if (ret == AVERROR(ENOSYS))
+ ret = 0;
if (ret)
goto fail;
diff --git a/libavutil/hwcontext_internal.h b/libavutil/hwcontext_internal.h
index 66f54142e..125517215 100644
--- a/libavutil/hwcontext_internal.h
+++ b/libavutil/hwcontext_internal.h
@@ -92,6 +92,11 @@ typedef struct HWContextType {
const AVFrame *src, int flags);
int (*map_from)(AVHWFramesContext *ctx, AVFrame *dst,
const AVFrame *src, int flags);
+ int (*map_frames_to)(AVHWFramesContext *dst_ctx,
+ AVHWFramesContext *src_ctx, int flags);
+ int (*map_frames_from)(AVHWFramesContext *dst_ctx,
+ AVHWFramesContext *src_ctx, int flags);
+
} HWContextType;
struct AVHWDeviceInternal {
--
2.11.0
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