media/audio/linux: Add CrasInputStream.

media/audio/linux/audio_manager_linux.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/linux/audio_manager_linux.h"
 
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/logging.h"
 #include "base/nix/xdg_util.h"
 #include "base/process_util.h"
 #include "base/stl_util.h"
 #include "media/audio/audio_output_dispatcher.h"
 #include "media/audio/linux/alsa_input.h"
 #include "media/audio/linux/alsa_output.h"
 #include "media/audio/linux/alsa_wrapper.h"
 #if defined(USE_PULSEAUDIO)
 #include "media/audio/pulse/pulse_output.h"
 #endif
 #if defined(USE_CRAS)
+#include "media/audio/linux/cras_input.h"
 #include "media/audio/linux/cras_output.h"
 #endif
 #include "media/base/limits.h"
 #include "media/base/media_switches.h"
 
 namespace media {
 
 // Maximum number of output streams that can be open simultaneously.
 static const int kMaxOutputStreams = 50;
 
@@ skipping 229 matching lines @@
 }
 
 AudioInputStream* AudioManagerLinux::MakeLowLatencyInputStream(
     const AudioParameters& params, const std::string& device_id) {
   DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format());
   return MakeInputStream(params, device_id);
 }
 
 AudioOutputStream* AudioManagerLinux::MakeOutputStream(
     const AudioParameters& params) {
-  AudioOutputStream* stream = NULL;
 #if defined(USE_CRAS)
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kUseCras)) {
-    stream = new CrasOutputStream(params, this);
-  } else {
+    return new CrasOutputStream(params, this);
+  }
 #endif
+
 #if defined(USE_PULSEAUDIO)
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kUsePulseAudio)) {
-    stream = new PulseAudioOutputStream(params, this);
-  } else {
-#endif
-    std::string device_name = AlsaPcmOutputStream::kAutoSelectDevice;
-    if (CommandLine::ForCurrentProcess()->HasSwitch(
-            switches::kAlsaOutputDevice)) {
-      device_name = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
-          switches::kAlsaOutputDevice);
-    }
-    stream = new AlsaPcmOutputStream(device_name, params, wrapper_.get(), this);
-#if defined(USE_PULSEAUDIO)
+    return new PulseAudioOutputStream(params, this);
   }
 #endif
-#if defined(USE_CRAS)
+
+  std::string device_name = AlsaPcmOutputStream::kAutoSelectDevice;
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kAlsaOutputDevice)) {
+    device_name = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+        switches::kAlsaOutputDevice);
   }
-#endif
-  DCHECK(stream);
-  return stream;
+  return new AlsaPcmOutputStream(device_name, params, wrapper_.get(), this);
 }
 
 AudioInputStream* AudioManagerLinux::MakeInputStream(
     const AudioParameters& params, const std::string& device_id) {
+#if defined(USE_CRAS)
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kUseCras)) {
+    return new CrasInputStream(params, this);
+  }
+#endif
 
   std::string device_name = (device_id == AudioManagerBase::kDefaultDeviceId) ?
       AlsaPcmInputStream::kAutoSelectDevice : device_id;
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kAlsaInputDevice)) {
     device_name = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
         switches::kAlsaInputDevice);
   }
 
   return new AlsaPcmInputStream(this, device_name, params, wrapper_.get());
 }
 
 AudioManager* CreateAudioManager() {
   return new AudioManagerLinux();
 }
 
 }  // namespace media