FFHWAccel: add buffer_ref argument to start_frame

This commit adds a reference to the buffer as an argument to
start_frame, and adapts all existing code.

This allows for asynchronous hardware accelerators to skip
copying packet data by referencing it.

1 files changed, 3 insertions, 1 deletions

diff --git a/libavcodec/hwaccel_internal.h b/libavcodec/hwaccel_internal.h
index 77df4e0904..7224406815 100644
--- a/libavcodec/hwaccel_internal.h
+++ b/libavcodec/hwaccel_internal.h
@@ -52,11 +52,13 @@ typedef struct FFHWAccel {
      * Otherwise, this means the whole frame is available at this point.
      *
      * @param avctx the codec context
+     * @param buf_ref the frame data buffer reference (optional)
      * @param buf the frame data buffer base
      * @param buf_size the size of the frame in bytes
      * @return zero if successful, a negative value otherwise
      */
-    int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
+    int (*start_frame)(AVCodecContext *avctx, const AVBufferRef *buf_ref,
+                       const uint8_t *buf, uint32_t buf_size);
 
     /**
      * Callback for parameter data (SPS/PPS/VPS etc).