vdpau: Add context and common helpers for hwaccel support

Signed-off-by: Diego Biurrun <diego@biurrun.de>

1 files changed, 63 insertions, 6 deletions

diff --git a/libavcodec/vdpau.h b/libavcodec/vdpau.h
index 241ff19051..7e692f767b 100644
--- a/libavcodec/vdpau.h
+++ b/libavcodec/vdpau.h
@@ -52,6 +52,68 @@
 #include <vdpau/vdpau.h>
 #include <vdpau/vdpau_x11.h>
 
+union VdpPictureInfo {
+    VdpPictureInfoH264        h264;
+    VdpPictureInfoMPEG1Or2    mpeg;
+    VdpPictureInfoVC1          vc1;
+    VdpPictureInfoMPEG4Part2 mpeg4;
+};
+
+/**
+ * This structure is used to share data between the libavcodec library and
+ * the client video application.
+ * The user shall zero-allocate the structure and make it available as
+ * AVCodecContext.hwaccel_context. Members can be set by the user once
+ * during initialization or through each AVCodecContext.get_buffer()
+ * function call. In any case, they must be valid prior to calling
+ * decoding functions.
+ */
+typedef struct AVVDPAUContext {
+    /**
+     * VDPAU decoder handle
+     *
+     * Set by user.
+     */
+    VdpDecoder decoder;
+
+    /**
+     * VDPAU decoder render callback
+     *
+     * Set by the user.
+     */
+    VdpDecoderRender *render;
+
+    /**
+     * VDPAU picture information
+     *
+     * Set by libavcodec.
+     */
+    union VdpPictureInfo info;
+
+    /**
+     * Allocated size of the bitstream_buffers table.
+     *
+     * Set by libavcodec.
+     */
+    int bitstream_buffers_allocated;
+
+    /**
+     * Useful bitstream buffers in the bitstream buffers table.
+     *
+     * Set by libavcodec.
+     */
+    int bitstream_buffers_used;
+
+   /**
+     * Table of bitstream buffers.
+     * The user is responsible for freeing this buffer using av_freep().
+     *
+     * Set by libavcodec.
+     */
+    VdpBitstreamBuffer *bitstream_buffers;
+} AVVDPAUContext;
+
+
 /** @brief The videoSurface is used for rendering. */
 #define FF_VDPAU_STATE_USED_FOR_RENDER 1
 
@@ -74,12 +136,7 @@ struct vdpau_render_state {
     int state; ///< Holds FF_VDPAU_STATE_* values.
 
     /** picture parameter information for all supported codecs */
-    union VdpPictureInfo {
-        VdpPictureInfoH264        h264;
-        VdpPictureInfoMPEG1Or2    mpeg;
-        VdpPictureInfoVC1          vc1;
-        VdpPictureInfoMPEG4Part2 mpeg4;
-    } info;
+    union VdpPictureInfo info;
 
     /** Describe size/location of the compressed video data.
         Set to 0 when freeing bitstream_buffers. */