MediaLog: Log selected audio/video decoder name.

media/base/audio_decoder.h

 // 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.
 
 #ifndef MEDIA_BASE_AUDIO_DECODER_H_
 #define MEDIA_BASE_AUDIO_DECODER_H_
 
+#include <string>
+
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "media/base/audio_decoder_config.h"
 #include "media/base/channel_layout.h"
 #include "media/base/decoder_buffer.h"
 #include "media/base/media_export.h"
 #include "media/base/pipeline_status.h"
 
 namespace media {
 
@@ skipping 22 matching lines @@
   typedef base::Callback<void(Status)> DecodeCB;
 
   AudioDecoder();
 
   // Fires any pending callbacks, stops and destroys the decoder.
   // Note: Since this is a destructor, |this| will be destroyed after this call.
   // Make sure the callbacks fired from this call doesn't post any task that
   // depends on |this|.
   virtual ~AudioDecoder();
 
+  // Returns the name of the decoder for logging purpose.
+  virtual std::string GetDisplayName() const = 0;
+
   // Initializes an AudioDecoder with the given DemuxerStream, executing the
   // callback upon completion.
   //  |statistics_cb| is used to update global pipeline statistics.
   //  |output_cb| is called for decoded audio buffers (see Decode()).
   virtual void Initialize(const AudioDecoderConfig& config,
                           const PipelineStatusCB& status_cb,
                           const OutputCB& output_cb) = 0;
 
   // Requests samples to be decoded. Only one decode may be in flight at any
   // given time. Once the buffer is decoded the decoder calls |decode_cb|.
@@ skipping 13 matching lines @@
   // aborted before |closure| is called.
   virtual void Reset(const base::Closure& closure) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AudioDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_DECODER_H_