libvpx: Pull from upstream

source/libvpx/vpx/vpx_frame_buffer.h

 /*
  *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 25 matching lines @@
 typedef struct vpx_codec_frame_buffer {
   uint8_t *data;  /**< Pointer to the data buffer */
   size_t size;  /**< Size of data in bytes */
   void *priv;  /**< Frame's private data */
 } vpx_codec_frame_buffer_t;
 
 /*!\brief get frame buffer callback prototype
  *
  * This callback is invoked by the decoder to retrieve data for the frame
  * buffer in order for the decode call to complete. The callback must
- * allocate at least min_size in bytes and assign it to fb->data. Then the
- * callback must set fb->size to the allocated size. The application does not
- * need to align the allocated data. The callback is triggered when the
- * decoder needs a frame buffer to decode a compressed image into. This
- * function may be called more than once for every call to vpx_codec_decode.
- * The application may set fb->priv to some data which will be passed
- * back in the ximage and the release function call. |fb| is guaranteed to
- * not be NULL. On success the callback must return 0. Any failure the
- * callback must return a value less than 0.
+ * allocate at least min_size in bytes and assign it to fb->data. The callback
+ * must zero out all the data allocated. Then the callback must set fb->size
+ * to the allocated size. The application does not need to align the allocated
+ * data. The callback is triggered when the decoder needs a frame buffer to
+ * decode a compressed image into. This function may be called more than once
+ * for every call to vpx_codec_decode. The application may set fb->priv to
+ * some data which will be passed back in the ximage and the release function
+ * call. |fb| is guaranteed to not be NULL. On success the callback must
+ * return 0. Any failure the callback must return a value less than 0.
  *
  * \param[in] priv         Callback's private data
  * \param[in] new_size     Size in bytes needed by the buffer
  * \param[in,out] fb       Pointer to vpx_codec_frame_buffer_t
  */
 typedef int (*vpx_get_frame_buffer_cb_fn_t)(
     void *priv, size_t min_size, vpx_codec_frame_buffer_t *fb);
 
 /*!\brief release frame buffer callback prototype
  *
  * This callback is invoked by the decoder when the frame buffer is not
  * referenced by any other buffers. |fb| is guaranteed to not be NULL. On
  * success the callback must return 0. Any failure the callback must return
  * a value less than 0.
  *
  * \param[in] priv         Callback's private data
  * \param[in] fb           Pointer to vpx_codec_frame_buffer_t
  */
 typedef int (*vpx_release_frame_buffer_cb_fn_t)(
     void *priv, vpx_codec_frame_buffer_t *fb);
 
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // VPX_VPX_FRAME_BUFFER_H_