Implement AudioOutputProxy.

media/audio/audio_parameters.cc

 // Copyright (c) 2010 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.
 
 #include "media/audio/audio_parameters.h"
 
 #include "media/base/limits.h"
 
 AudioParameters::AudioParameters()
     : format(AUDIO_PCM_LINEAR),
@@ skipping 19 matching lines @@
       (sample_rate > 0) && (sample_rate <= media::Limits::kMaxSampleRate) &&
       (bits_per_sample > 0) &&
       (bits_per_sample <= media::Limits::kMaxBitsPerSample) &&
       (samples_per_packet > 0) &&
       (samples_per_packet <= media::Limits::kMaxSamplesPerPacket);
 }
 
 int AudioParameters::GetPacketSize() const {
   return samples_per_packet * channels * bits_per_sample / 8;
 }
+
+// CompareAudioParams is needed for map to use AudioParameters as a
+// map key.

[scherkus (not reviewing), 2010/11/24 05:03:12]

nit: I'd delete this comment because it's duplicated from header file -- and it
still has old class name :P

[Sergey Ulanov, 2010/11/24 19:13:51]

Done.

+bool AudioParameters::Compare::operator()(
+    const AudioParameters& a,
+    const AudioParameters& b) const {
+  if (a.format < b.format)
+    return true;
+  if (a.format > b.format)
+    return false;
+  if (a.channels < b.channels)
+    return true;
+  if (a.channels > b.channels)
+    return false;
+  if (a.sample_rate < b.sample_rate)
+    return true;
+  if (a.sample_rate > b.sample_rate)
+    return false;
+  if (a.bits_per_sample < b.bits_per_sample)
+    return true;
+  if (a.bits_per_sample > b.bits_per_sample)
+    return false;
+  return a.samples_per_packet < b.samples_per_packet;
+}