MediaCodecPlayer implementation (stage 4 - preroll)

media/base/android/media_codec_bridge.h

 // Copyright (c) 2013 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.
 
 #ifndef MEDIA_BASE_ANDROID_MEDIA_CODEC_BRIDGE_H_
 #define MEDIA_BASE_ANDROID_MEDIA_CODEC_BRIDGE_H_
 
 #include <jni.h>
 #include <set>
 #include <string>
@@ skipping 215 matching lines @@
 
   // See MediaCodecBridge::IsKnownUnaccelerated().
   static bool IsKnownUnaccelerated(const AudioCodec& codec);
 
   // Start the audio codec bridge.
   bool Start(const AudioCodec& codec, int sample_rate, int channel_count,
              const uint8* extra_data, size_t extra_data_size,
              int64 codec_delay_ns, int64 seek_preroll_ns,
              bool play_audio, jobject media_crypto) WARN_UNUSED_RESULT;
 
-  // Play the output buffer. This call must be called after
-  // DequeueOutputBuffer() and before ReleaseOutputBuffer. Returns the playback
-  // head position expressed in frames.
-  int64 PlayOutputBuffer(int index, size_t size);
+  // Plays the output buffer right away or save for later playback if |postpone|
+  // is set to true. This call must be called after DequeueOutputBuffer() and
+  // before ReleaseOutputBuffer. The data is extracted from the output buffers
+  // using |index| and |size|. Returns the playback head position expressed
+  // in frames.
+  // When |postpone| is set to true, the next PlayOutputBuffer() should have
+  // postpone == false, and if will play two buffers: the postponed one and

[wolenetz, 2015/08/20 23:39:12]

nit: s/if/it/

[Tima Vaisburd, 2015/08/21 20:18:24]

Done.

+  // the one identified by |index|.
+  int64 PlayOutputBuffer(int index, size_t size, bool postpone = false);
 
   // Set the volume of the audio output.
   void SetVolume(double volume);
 
  private:
   explicit AudioCodecBridge(const std::string& mime);
 
   // Configure the java MediaFormat object with the extra codec data passed in.
   bool ConfigureMediaFormat(jobject j_format, const AudioCodec& codec,
                             const uint8* extra_data, size_t extra_data_size,
@@ skipping 44 matching lines @@
   VideoCodecBridge(const std::string& mime,
                    bool is_secure,
                    MediaCodecDirection direction);
 
   int adaptive_playback_supported_for_testing_;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_CODEC_BRIDGE_H_