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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/logging.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 {
const int kMaxInputChannels = 2;
const int kMaxSamplesPerPacket = media::Limits::kMaxSampleRate;
} // 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();
}
if (!initialized()) {
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());
AutoLock l(lock_);
active_streams_[stream] = scoped_refptr<AlsaPcmOutputStream>(stream);
return stream;
}
AudioInputStream* AudioManagerLinux::MakeAudioInputStream(
AudioParameters params, int samples_per_packet) {
if (!params.IsValid() || params.channels > kMaxInputChannels ||
samples_per_packet < 0 || samples_per_packet > kMaxSamplesPerPacket)
return NULL;
if (params.format == AudioParameters::AUDIO_MOCK) {
return FakeAudioInputStream::MakeFakeStream(params, samples_per_packet);
} 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, samples_per_packet, 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();
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) {
AutoLock l(lock_);
active_streams_.erase(stream);
}
}
// static
AudioManager* AudioManager::CreateAudioManager() {
return new AudioManagerLinux();
}
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