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// 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/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"
#include "media/audio/linux/alsa_input.h"
#include "media/audio/linux/alsa_output.h"
#include "media/audio/linux/alsa_wrapper.h"
#include "media/base/limits.h"
#include "media/base/media_switches.h"
namespace {
// Maximum number of output streams that can be open simultaneously.
const size_t kMaxOutputStreams = 50;
const int kMaxInputChannels = 2;
} // namespace
// Implementation of AudioManager.
bool AudioManagerLinux::HasAudioOutputDevices() {
// TODO(ajwong): Make this actually query audio devices.
return true;
}
bool AudioManagerLinux::HasAudioInputDevices() {
// TODO(satish): Make this actually query audio devices.
return true;
}
AudioOutputStream* AudioManagerLinux::MakeAudioOutputStream(
AudioParameters params) {
// Early return for testing hook. Do this before checking for
// |initialized_|.
if (params.format == AudioParameters::AUDIO_MOCK) {
return FakeAudioOutputStream::MakeFakeStream(params);
}
if (!initialized()) {
return NULL;
}
// Don't allow opening more than |kMaxOutputStreams| streams.
if (active_streams_.size() >= kMaxOutputStreams) {
return NULL;
}
std::string device_name = AlsaPcmOutputStream::kAutoSelectDevice;
if (CommandLine::ForCurrentProcess()->HasSwitch(
switches::kAlsaOutputDevice)) {
device_name = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
switches::kAlsaOutputDevice);
}
AlsaPcmOutputStream* stream =
new AlsaPcmOutputStream(device_name, params, wrapper_.get(), this,
GetMessageLoop());
base::AutoLock l(lock_);
active_streams_[stream] = scoped_refptr<AlsaPcmOutputStream>(stream);
return stream;
}
AudioInputStream* AudioManagerLinux::MakeAudioInputStream(
AudioParameters params) {
if (!params.IsValid() || params.channels > kMaxInputChannels)
return NULL;
if (params.format == AudioParameters::AUDIO_MOCK) {
return FakeAudioInputStream::MakeFakeStream(params);
} else if (params.format != AudioParameters::AUDIO_PCM_LINEAR) {
return NULL;
}
if (!initialized())
return NULL;
std::string device_name = AlsaPcmOutputStream::kAutoSelectDevice;
if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kAlsaInputDevice)) {
device_name = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
switches::kAlsaInputDevice);
}
AlsaPcmInputStream* stream = new AlsaPcmInputStream(
device_name, params, wrapper_.get());
return stream;
}
AudioManagerLinux::AudioManagerLinux() {
}
AudioManagerLinux::~AudioManagerLinux() {
// Make sure we stop the thread first. If we let the default destructor to
// destruct the members, we may destroy audio streams before stopping the
// thread, resulting an unexpected behavior.
// This way we make sure activities of the audio streams are all stopped
// before we destroy them.
audio_thread_.Stop();
// Free output dispatchers, closing all remaining open streams.
output_dispatchers_.clear();
active_streams_.clear();
}
void AudioManagerLinux::Init() {
AudioManagerBase::Init();
wrapper_.reset(new AlsaWrapper());
}
void AudioManagerLinux::MuteAll() {
NOTIMPLEMENTED();
}
void AudioManagerLinux::UnMuteAll() {
NOTIMPLEMENTED();
}
void AudioManagerLinux::ReleaseOutputStream(AlsaPcmOutputStream* stream) {
if (stream) {
base::AutoLock l(lock_);
active_streams_.erase(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();
}
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