Set audio format before adding pepper sink to audio track.

content/renderer/media/webrtc_audio_capturer.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 "content/renderer/media/webrtc_audio_capturer.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
@@ skipping 416 matching lines @@
 
 int WebRtcAudioCapturer::Volume() const {
   base::AutoLock auto_lock(lock_);
   return volume_;
 }
 
 int WebRtcAudioCapturer::MaxVolume() const {
   return WebRtcAudioDeviceImpl::kMaxVolumeLevel;
 }
 
+media::AudioParameters WebRtcAudioCapturer::GetOutputFormat() const {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  return audio_processor_->OutputFormat();
+}
+
 void WebRtcAudioCapturer::Capture(const media::AudioBus* audio_source,
                                   int audio_delay_milliseconds,
                                   double volume,
                                   bool key_pressed) {
 // This callback is driven by AudioInputDevice::AudioThreadCallback if
 // |source_| is AudioInputDevice, otherwise it is driven by client's
 // CaptureCallback.
 #if defined(OS_WIN) || defined(OS_MACOSX)
   DCHECK_LE(volume, 1.0);
 #elif (defined(OS_LINUX) && !defined(OS_CHROMEOS)) || defined(OS_OPENBSD)
@@ skipping 135 matching lines @@
 
 void WebRtcAudioCapturer::SetCapturerSourceForTesting(
     const scoped_refptr<media::AudioCapturerSource>& source,
     media::AudioParameters params) {
   // Create a new audio stream as source which uses the new source.
   SetCapturerSource(source, params.channel_layout(),
                     static_cast<float>(params.sample_rate()));
 }
 
 }  // namespace content