Adds method to invoke platform provided audio input UI.

This will be used in a future CL by the speech input feature.

BUG=69886
TEST=none

Review URL: http://codereview.chromium.org/6602012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@76363 0039d316-1c4b-4281-b951-d872f2087c98

8 files changed, 78 insertions, 0 deletions

diff --git a/media/audio/audio_manager.h b/media/audio/audio_manager.h
index 2afc789..370fd8e 100644
--- a/media/audio/audio_manager.h
+++ b/media/audio/audio_manager.h
@@ -7,6 +7,7 @@
 
 #include "base/basictypes.h"
 #include "base/string16.h"
+#include "base/task.h"
 #include "media/audio/audio_parameters.h"
 
 class AudioInputStream;
@@ -34,6 +35,16 @@ class AudioManager {
   // input device for this computer.
   virtual string16 GetAudioInputDeviceModel() = 0;
 
+  // Returns true if the platform specific audio input settings UI is known
+  // and can be shown.
+  virtual bool CanShowAudioInputSettings() = 0;
+
+  // Opens the platform default audio input settings UI.
+  // Note: This could invoke an external application/preferences pane, so
+  // ideally must not be called from the UI thread or other time sensitive
+  // threads to avoid blocking the rest of the application.
+  virtual void ShowAudioInputSettings() = 0;
+
   // Factory for all the supported stream formats. |params| defines parameters
   // of the audio stream to be created.
   //
@@ -103,4 +114,6 @@ class AudioManager {
   static AudioManager* CreateAudioManager();
 };
 
+DISABLE_RUNNABLE_METHOD_REFCOUNT(AudioManager);
+
 #endif  // MEDIA_AUDIO_AUDIO_MANAGER_H_
diff --git a/media/audio/audio_manager_base.cc b/media/audio/audio_manager_base.cc
index 73a97ba..024aff3 100644
--- a/media/audio/audio_manager_base.cc
+++ b/media/audio/audio_manager_base.cc
@@ -51,3 +51,10 @@ AudioOutputStream* AudioManagerBase::MakeAudioOutputStreamProxy(
 
   return new AudioOutputProxy(dispatcher);
 }
+
+bool AudioManagerBase::CanShowAudioInputSettings() {
+  return false;
+}
+
+void AudioManagerBase::ShowAudioInputSettings() {
+}
diff --git a/media/audio/audio_manager_base.h b/media/audio/audio_manager_base.h
index 51364b7..a5140a2 100644
--- a/media/audio/audio_manager_base.h
+++ b/media/audio/audio_manager_base.h
@@ -24,6 +24,9 @@ class AudioManagerBase : public AudioManager {
 
   virtual string16 GetAudioInputDeviceModel();
 
+  virtual bool CanShowAudioInputSettings();
+  virtual void ShowAudioInputSettings();
+
   virtual AudioOutputStream* MakeAudioOutputStreamProxy(
       const AudioParameters& params);
 
diff --git a/media/audio/audio_output_proxy_unittest.cc b/media/audio/audio_output_proxy_unittest.cc
index 2f308bd..8ffb70b 100644
--- a/media/audio/audio_output_proxy_unittest.cc
+++ b/media/audio/audio_output_proxy_unittest.cc
@@ -50,6 +50,8 @@ class MockAudioManager : public AudioManager {
       AudioParameters params));
   MOCK_METHOD0(MuteAll, void());
   MOCK_METHOD0(UnMuteAll, void());
+  MOCK_METHOD0(CanShowAudioInputSettings, bool());
+  MOCK_METHOD0(ShowAudioInputSettings, void());
   MOCK_METHOD0(GetMessageLoop, MessageLoop*());
 };
 
diff --git a/media/audio/linux/audio_manager_linux.cc b/media/audio/linux/audio_manager_linux.cc
index 4c92a6f..09c8625 100644
--- a/media/audio/linux/audio_manager_linux.cc
+++ b/media/audio/linux/audio_manager_linux.cc
@@ -5,7 +5,10 @@
 #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 "media/audio/audio_output_dispatcher.h"
 #include "media/audio/fake_audio_input_stream.h"
 #include "media/audio/fake_audio_output_stream.h"
@@ -130,6 +133,24 @@ void AudioManagerLinux::ReleaseOutputStream(AlsaPcmOutputStream* stream) {
   }
 }
 
+bool AudioManagerLinux::CanShowAudioInputSettings() {
+  scoped_ptr<base::Environment> env(base::Environment::Create());
+  base::nix::DesktopEnvironment desktop = base::nix::GetDesktopEnvironment(
+      env.get());
+  return (desktop == base::nix::DESKTOP_ENVIRONMENT_GNOME ||
+          desktop == base::nix::DESKTOP_ENVIRONMENT_KDE3 ||
+          desktop == base::nix::DESKTOP_ENVIRONMENT_KDE4);
+}
+
+void AudioManagerLinux::ShowAudioInputSettings() {
+  scoped_ptr<base::Environment> env(base::Environment::Create());
+  base::nix::DesktopEnvironment desktop = base::nix::GetDesktopEnvironment(
+      env.get());
+  std::string command((desktop == base::nix::DESKTOP_ENVIRONMENT_GNOME) ?
+                      "gnome-volume-control" : "kmix");
+  base::LaunchApp(CommandLine(FilePath(command)), false, false, NULL);
+}
+
 // static
 AudioManager* AudioManager::CreateAudioManager() {
   return new AudioManagerLinux();
diff --git a/media/audio/linux/audio_manager_linux.h b/media/audio/linux/audio_manager_linux.h
index b657966..ca759f0 100644
--- a/media/audio/linux/audio_manager_linux.h
+++ b/media/audio/linux/audio_manager_linux.h
@@ -28,6 +28,8 @@ class AudioManagerLinux : public AudioManagerBase {
   virtual bool HasAudioInputDevices();
   virtual AudioOutputStream* MakeAudioOutputStream(AudioParameters params);
   virtual AudioInputStream* MakeAudioInputStream(AudioParameters params);
+  virtual bool CanShowAudioInputSettings();
+  virtual void ShowAudioInputSettings();
 
   virtual void MuteAll();
   virtual void UnMuteAll();
diff --git a/media/audio/win/audio_manager_win.cc b/media/audio/win/audio_manager_win.cc
index 0c896d1..7b3d6fa 100644
--- a/media/audio/win/audio_manager_win.cc
+++ b/media/audio/win/audio_manager_win.cc
@@ -11,9 +11,14 @@
 #include <setupapi.h>
 
 #include "base/basictypes.h"
+#include "base/command_line.h"
+#include "base/file_path.h"
+#include "base/path_service.h"
+#include "base/process_util.h"
 #include "base/scoped_ptr.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
+#include "base/win/windows_version.h"
 #include "media/audio/fake_audio_input_stream.h"
 #include "media/audio/fake_audio_output_stream.h"
 #include "media/audio/win/audio_manager_win.h"
@@ -229,6 +234,29 @@ string16 AudioManagerWin::GetAudioInputDeviceModel() {
   return string16();
 }
 
+bool AudioManagerWin::CanShowAudioInputSettings() {
+  return true;
+}
+
+void AudioManagerWin::ShowAudioInputSettings() {
+  std::wstring program;
+  std::string argument;
+  if (base::win::GetVersion() <= base::win::VERSION_XP) {
+    program = L"sndvol32.exe";
+    argument = "-R";
+  } else {
+    program = L"control.exe";
+    argument = "mmsys.cpl,,1";
+  }
+
+  FilePath path;
+  PathService::Get(base::DIR_SYSTEM, &path);
+  path = path.Append(program);
+  CommandLine command_line(path);
+  command_line.AppendArg(argument);
+  base::LaunchApp(command_line, false, false, NULL);
+}
+
 // static
 AudioManager* AudioManager::CreateAudioManager() {
   return new AudioManagerWin();
diff --git a/media/audio/win/audio_manager_win.h b/media/audio/win/audio_manager_win.h
index d6ff37f..1edd6a6 100644
--- a/media/audio/win/audio_manager_win.h
+++ b/media/audio/win/audio_manager_win.h
@@ -27,6 +27,8 @@ class AudioManagerWin : public AudioManagerBase {
   virtual void MuteAll();
   virtual void UnMuteAll();
   virtual string16 GetAudioInputDeviceModel();
+  virtual bool CanShowAudioInputSettings();
+  virtual void ShowAudioInputSettings();
 
   // Windows-only methods to free a stream created in MakeAudioStream. These
   // are called internally by the audio stream when it has been closed.