We will likely want to add new fields to it in the future, so this is
needed to avoid breaking ABI.
---
doc/APIchanges | 2 ++
libavcodec/vdpau.c | 5 +++++
libavcodec/vdpau.h | 11 +++++++++++
3 files changed, 18 insertions(+)
diff --git a/doc/APIchanges b/doc/APIchanges
index 6d0a164..d68ebc5 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,8 @@ API changes, most recent first:
2013-11-xx - xxxxxxx - lavc 55.25.0 - vdpau.h
Add av_vdpau_get_profile().
+ Add av_vdpau_alloc_context(). This function must from now on be
+ used for allocating AVVDPAUContext.
2013-11-xx - xxxxxxx - lavc 55.25.0 - avcodec.h
Add ITU-R BT.2020 and other not yet included values to color primaries,
diff --git a/libavcodec/vdpau.c b/libavcodec/vdpau.c
index cc0bcff..d8a35ee 100644
--- a/libavcodec/vdpau.c
+++ b/libavcodec/vdpau.c
@@ -133,4 +133,9 @@ do { \
return AVERROR(EINVAL);
}
+AVVDPAUContext *av_vdpau_alloc_context(void)
+{
+ return av_mallocz(sizeof(AVVDPAUContext));
+}
+
/* @}*/
diff --git a/libavcodec/vdpau.h b/libavcodec/vdpau.h
index bf8c8e8..5a5c178 100644
--- a/libavcodec/vdpau.h
+++ b/libavcodec/vdpau.h
@@ -74,6 +74,10 @@ union AVVDPAUPictureInfo {
* during initialization or through each AVCodecContext.get_buffer()
* function call. In any case, they must be valid prior to calling
* decoding functions.
+ *
+ * This size of this structure is not a part of the public ABI and must not
+ * be used outside of libavcodec. Use av_vdpau_alloc_context() to allocate an
+ * AVVDPAUContext.
*/
typedef struct AVVDPAUContext {
/**
@@ -127,6 +131,13 @@ typedef struct AVVDPAUContext {
} AVVDPAUContext;
/**
+ * Allocate an AVVDPAUContext.
+ *
+ * @return newly allocated AVVDPAUContext or NULL on failure.
+ */
+AVVDPAUContext *av_vdpau_alloc_context(void);
+
+/**
* Get a decoder profile that should be used for initializing a VDPAU decoder.
* Should be called from the AVCodecContext.get_format() callback.
*
--
1.7.10.4
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