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hwcontext: Improve allocation in derived contexts

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Use the flags argument of av_hwframe_ctx_create_derived() to pass the
mapping flags which will be used on allocation.  Also, set the format
and hardware context on the allocated frame automatically - the user
should not be required to do this themselves.
This commit is contained in:
Mark Thompson 2017-03-04 23:57:40 +00:00
parent e1c5d56b18
commit c5714b51aa
5 changed files with 26 additions and 3 deletions
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4
doc/APIchanges
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@ -13,6 +13,10 @@ libavutil: 2017-03-23
API changes, most recent first:
2017-04-30 - xxxxxxx - lavu 56.1.1 - hwcontext.h
av_hwframe_ctx_create_derived() now takes some AV_HWFRAME_MAP_* combination
as its flags argument (which was previously unused).
2017-04-xx - xxxxxxx - lavu 56.1.0 - spherical.h
Add av_spherical_projection_name() and av_spherical_from_name().

14
libavutil/hwcontext.c
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@ -455,6 +455,11 @@ int av_hwframe_get_buffer(AVBufferRef *hwframe_ref, AVFrame *frame, int flags)
// and map the frame immediately.
AVFrame *src_frame;
frame->format = ctx->format;
frame->hw_frames_ctx = av_buffer_ref(hwframe_ref);
if (!frame->hw_frames_ctx)
return AVERROR(ENOMEM);
src_frame = av_frame_alloc();
if (!src_frame)
return AVERROR(ENOMEM);
@ -464,7 +469,8 @@ int av_hwframe_get_buffer(AVBufferRef *hwframe_ref, AVFrame *frame, int flags)
if (ret < 0)
return ret;
ret = av_hwframe_map(frame, src_frame, 0);
ret = av_hwframe_map(frame, src_frame,
ctx->internal->source_allocation_map_flags);
if (ret) {
av_log(ctx, AV_LOG_ERROR, "Failed to map frame into derived "
"frame context: %d.\n", ret);
@ -816,6 +822,12 @@ int av_hwframe_ctx_create_derived(AVBufferRef **derived_frame_ctx,
goto fail;
}
dst->internal->source_allocation_map_flags =
flags & (AV_HWFRAME_MAP_READ |
AV_HWFRAME_MAP_WRITE |
AV_HWFRAME_MAP_OVERWRITE |
AV_HWFRAME_MAP_DIRECT);
ret = AVERROR(ENOSYS);
if (src->internal->hw_type->frames_derive_from)
ret = src->internal->hw_type->frames_derive_from(dst, src, flags);

4
libavutil/hwcontext.h
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@ -564,7 +564,9 @@ int av_hwframe_map(AVFrame *dst, const AVFrame *src, int flags);
* AVHWFramesContext on.
* @param source_frame_ctx A reference to an existing AVHWFramesContext
* which will be mapped to the derived context.
* @param flags Currently unused; should be set to zero.
* @param flags Some combination of AV_HWFRAME_MAP_* flags, defining the
* mapping parameters to apply to frames which are allocated
* in the derived device.
* @return Zero on success, negative AVERROR code on failure.
*/
int av_hwframe_ctx_create_derived(AVBufferRef **derived_frame_ctx,

5
libavutil/hwcontext_internal.h
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@ -121,6 +121,11 @@ struct AVHWFramesInternal {
* context it was derived from.
*/
AVBufferRef *source_frames;
/**
* Flags to apply to the mapping from the source to the derived
* frame context when trying to allocate in the derived context.
*/
int source_allocation_map_flags;
};
typedef struct HWMapDescriptor {

2
libavutil/version.h
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@ -55,7 +55,7 @@
#define LIBAVUTIL_VERSION_MAJOR 56
#define LIBAVUTIL_VERSION_MINOR 1
#define LIBAVUTIL_VERSION_MICRO 0
#define LIBAVUTIL_VERSION_MICRO 1
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
LIBAVUTIL_VERSION_MINOR, \