Fix in process PPAPI decryption.

ppapi/api/private/ppb_content_decryptor_private.idl

 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /**
  * This file defines the <code>PPB_ContentDecryptor_Private</code>
  * interface. Note: This is a special interface, only to be used for Content
  * Decryption Modules, not normal plugins.
  */
@@ skipping 115 matching lines @@
       [in] PP_Var key_system,
       [in] PP_Var session_id,
       [in] int32_t media_error,
       [in] int32_t system_code);
 
   /**
    * Called after the <code>Decrypt()</code> method on the
    * <code>PPP_ContentDecryptor_Private</code> interface completes to
    * deliver decrypted_block to the browser for decoding and rendering.
    *
+   * The plugin must not hold a reference to the encrypted buffer resource
+   * provided to <code>Decrypt()</code> when it calls this method. The browser
+   * will reuse the buffer in a subsequent <code>Decrypt()</code> call.
+   *
    * @param[in] decrypted_block A <code>PP_Resource</code> corresponding to a
    * <code>PPB_Buffer_Dev</code> resource that contains a decrypted data
    * block.
    *
    * @param[in] decrypted_block_info A <code>PP_DecryptedBlockInfo</code> that
    * contains the result code and tracking info associated with the
    * <code>decrypted_block</code>.
    */
   void DeliverBlock(
       [in] PP_Instance instance,
@@ skipping 54 matching lines @@
   void DecoderResetDone(
       [in] PP_Instance instance,
       [in] PP_DecryptorStreamType decoder_type,
       [in] uint32_t request_id);
 
   /**
    * Called after the <code>DecryptAndDecode()</code> method on the
    * <code>PPP_ContentDecryptor_Private</code> interface completes to deliver
    * a decrypted and decoded video frame to the browser for rendering.
    *
+   * The plugin must not hold a reference to the encrypted buffer resource
+   * provided to <code>DecryptAndDecode()</code> when it calls this method. The
+   * browser will reuse the buffer in a subsequent
+   * <code>DecryptAndDecode()</code> call.
+   *
    * @param[in] decrypted_frame A <code>PP_Resource</code> corresponding to a
    * <code>PPB_Buffer_Dev</code> resource that contains a video frame.
    *
    * @param[in] decrypted_frame_info A <code>PP_DecryptedFrameInfo</code> that
    * contains the result code, tracking info, and buffer format associated with
    * <code>decrypted_frame</code>.
    */
   void DeliverFrame(
       [in] PP_Instance instance,
       [in] PP_Resource decrypted_frame,
       [in] PP_DecryptedFrameInfo decrypted_frame_info);
 
   /**
    * Called after the <code>DecryptAndDecode()</code> method on the
-   * <code>PPP_ContentDecryptor_Private</code> interface completes to
-   * deliver a buffer of decrypted and decoded audio samples to the browser for
+   * <code>PPP_ContentDecryptor_Private</code> interface completes to deliver
+   * a buffer of decrypted and decoded audio samples to the browser for
    * rendering.
    *
+   * The plugin must not hold a reference to the encrypted buffer resource
+   * provided to <code>DecryptAndDecode()</code> when it calls this method. The
+   * browser will reuse the buffer in a subsequent
+   * <code>DecryptAndDecode()</code> call.
+   *
    * <code>audio_frames</code> can contain multiple audio output buffers. Each
    * buffer is serialized in this format:
    *
    * |<------------------- serialized audio buffer ------------------->|
    * | int64_t timestamp | int64_t length | length bytes of audio data |
    *
    * For example, with three audio output buffers, |audio_frames| will look
    * like this:
    *
    * |<---------------- audio_frames ------------------>|
    * | audio buffer 0 | audio buffer 1 | audio buffer 2 |
    *
    * @param[in] audio_frames A <code>PP_Resource</code> corresponding to a
    * <code>PPB_Buffer_Dev</code> resource that contains a decrypted buffer
    * of decoded audio samples.
    *
    * @param[in] decrypted_block_info A <code>PP_DecryptedBlockInfo</code> that
    * contains the tracking info and result code associated with the
    * <code>decrypted_block</code>.
    */
   void DeliverSamples(
       [in] PP_Instance instance,
       [in] PP_Resource audio_frames,
       [in] PP_DecryptedBlockInfo decrypted_block_info);
 };