Add GetOutputStreamParameters, GetAssociatedOutputDeviceID to AudioManager.

media/audio/win/audio_low_latency_output_win.cc

 // 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.
 
 #include "media/audio/win/audio_low_latency_output_win.h"
 
 #include <Functiondiscoverykeys_devpkey.h>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 93 matching lines @@
       eRender, eConsole, &format)) ?
       static_cast<int>(format.Format.nChannels) : 0;
 }
 
 // static
 ChannelLayout WASAPIAudioOutputStream::HardwareChannelLayout() {
   return ChannelConfigToChannelLayout(GetChannelConfig());
 }
 
 // static
-int WASAPIAudioOutputStream::HardwareSampleRate() {
+int WASAPIAudioOutputStream::HardwareSampleRate(const std::string& device_id) {
   WAVEFORMATPCMEX format;
-  return SUCCEEDED(CoreAudioUtil::GetDefaultSharedModeMixFormat(
-      eRender, eConsole, &format)) ?
-      static_cast<int>(format.Format.nSamplesPerSec) : 0;
+  ScopedComPtr<IAudioClient> client;
+  if (device_id.empty()) {
+    client = CoreAudioUtil::CreateDefaultClient(eRender, eConsole);
+  } else {
+    ScopedComPtr<IMMDevice> device(CoreAudioUtil::CreateDevice(device_id));
+    if (!device)
+      return 0;
+    client = CoreAudioUtil::CreateClient(device);
+  }
+
+  if (!client || FAILED(CoreAudioUtil::GetSharedModeMixFormat(client, &format)))
+    return 0;
+
+  return static_cast<int>(format.Format.nSamplesPerSec);
 }
 
 WASAPIAudioOutputStream::WASAPIAudioOutputStream(AudioManagerWin* manager,
                                                  const AudioParameters& params,
                                                  ERole device_role)
     : creating_thread_id_(base::PlatformThread::CurrentId()),
       manager_(manager),
       opened_(false),
       audio_parameters_are_valid_(false),
       volume_(1.0),
@@ skipping 547 matching lines @@
     VLOG(1) << "IAudioClient::GetBufferSize: " << std::hex << hr;
     return hr;
   }
 
   *endpoint_buffer_size = buffer_size_in_frames;
   VLOG(2) << "endpoint buffer size: " << buffer_size_in_frames;
   return hr;
 }
 
 }  // namespace media