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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/at_exit.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "media/audio/fake_audio_input_stream.h"
#include "media/audio/fake_audio_output_stream.h"
#include "media/audio/linux/alsa_output.h"
#include "media/audio/linux/alsa_wrapper.h"
#include "media/base/media_switches.h"
namespace {
AudioManagerLinux* g_audio_manager = NULL;
} // namespace
// Implementation of AudioManager.
bool AudioManagerLinux::HasAudioOutputDevices() {
// TODO(ajwong): Make this actually query audio devices.
return true;
}
bool AudioManagerLinux::HasAudioInputDevices() {
// TODO(satish): implement.
return false;
}
AudioInputStream* AudioManagerLinux::MakeAudioInputStream(
Format format,
int channels,
int sample_rate,
char bits_per_sample,
uint32 samples_per_packet) {
if (format == AUDIO_MOCK) {
return FakeAudioInputStream::MakeFakeStream(channels, bits_per_sample,
sample_rate,
samples_per_packet);
}
// TODO(satish): implement.
return NULL;
}
AudioOutputStream* AudioManagerLinux::MakeAudioOutputStream(
Format format,
int channels,
int sample_rate,
char bits_per_sample) {
// Early return for testing hook. Do this before checking for
// |initialized_|.
if (format == AudioManager::AUDIO_MOCK) {
return FakeAudioOutputStream::MakeFakeStream();
}
if (!initialized_) {
return NULL;
}
std::string device_name = AlsaPcmOutputStream::kAutoSelectDevice;
if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kAlsaDevice)) {
device_name = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
switches::kAlsaDevice);
}
AlsaPcmOutputStream* stream =
new AlsaPcmOutputStream(device_name, format, channels, sample_rate,
bits_per_sample, wrapper_.get(), this,
audio_thread_.message_loop());
AutoLock l(lock_);
active_streams_[stream] = scoped_refptr<AlsaPcmOutputStream>(stream);
return stream;
}
AudioManagerLinux::AudioManagerLinux()
: audio_thread_("AudioThread"),
initialized_(false) {
}
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();
active_streams_.clear();
}
void AudioManagerLinux::Init() {
initialized_ = audio_thread_.Start();
wrapper_.reset(new AlsaWrapper());
}
void AudioManagerLinux::MuteAll() {
NOTIMPLEMENTED();
}
void AudioManagerLinux::UnMuteAll() {
NOTIMPLEMENTED();
}
void AudioManagerLinux::ReleaseOutputStream(AlsaPcmOutputStream* stream) {
if (stream) {
AutoLock l(lock_);
active_streams_.erase(stream);
}
}
// TODO(ajwong): Collapse this with the windows version.
void DestroyAudioManagerLinux(void* not_used) {
delete g_audio_manager;
g_audio_manager = NULL;
}
AudioManager* AudioManager::GetAudioManager() {
if (!g_audio_manager) {
g_audio_manager = new AudioManagerLinux();
g_audio_manager->Init();
base::AtExitManager::RegisterCallback(&DestroyAudioManagerLinux, NULL);
}
return g_audio_manager;
}
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