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// 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/fake_audio_input_stream.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/single_thread_task_runner.h"
#include "base/time/time.h"
#include "media/audio/audio_manager_base.h"
#include "media/audio/simple_sources.h"
#include "media/base/audio_bus.h"
#include "media/base/media_switches.h"
namespace media {
AudioInputStream* FakeAudioInputStream::MakeFakeStream(
AudioManagerBase* manager,
const AudioParameters& params) {
return new FakeAudioInputStream(manager, params);
}
FakeAudioInputStream::FakeAudioInputStream(AudioManagerBase* manager,
const AudioParameters& params)
: audio_manager_(manager),
callback_(NULL),
fake_audio_worker_(manager->GetWorkerTaskRunner(), params),
params_(params),
audio_bus_(AudioBus::Create(params)) {
DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
}
FakeAudioInputStream::~FakeAudioInputStream() {
DCHECK(!callback_);
}
bool FakeAudioInputStream::Open() {
DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
audio_bus_->Zero();
return true;
}
void FakeAudioInputStream::Start(AudioInputCallback* callback) {
DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
callback_ = callback;
fake_audio_worker_.Start(base::Bind(
&FakeAudioInputStream::ReadAudioFromSource, base::Unretained(this)));
}
void FakeAudioInputStream::Stop() {
DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
fake_audio_worker_.Stop();
callback_ = NULL;
}
void FakeAudioInputStream::Close() {
DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
DCHECK(!callback_);
audio_manager_->ReleaseInputStream(this);
}
double FakeAudioInputStream::GetMaxVolume() {
DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
return 1.0;
}
void FakeAudioInputStream::SetVolume(double volume) {
DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
}
double FakeAudioInputStream::GetVolume() {
DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
return 1.0;
}
bool FakeAudioInputStream::IsMuted() {
DCHECK(audio_manager_->GetTaskRunner()->BelongsToCurrentThread());
return false;
}
bool FakeAudioInputStream::SetAutomaticGainControl(bool enabled) {
return false;
}
bool FakeAudioInputStream::GetAutomaticGainControl() {
return false;
}
void FakeAudioInputStream::ReadAudioFromSource() {
DCHECK(audio_manager_->GetWorkerTaskRunner()->BelongsToCurrentThread());
DCHECK(callback_);
if (!audio_source_)
audio_source_ = ChooseSource();
const int kNoDelay = 0;
audio_source_->OnMoreData(audio_bus_.get(), kNoDelay, 0);
callback_->OnData(this, audio_bus_.get(), 0, 1.0);
}
using AudioSourceCallback = AudioOutputStream::AudioSourceCallback;
scoped_ptr<AudioSourceCallback> FakeAudioInputStream::ChooseSource() {
DCHECK(audio_manager_->GetWorkerTaskRunner()->BelongsToCurrentThread());
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kUseFileForFakeAudioCapture)) {
base::FilePath path_to_wav_file =
base::CommandLine::ForCurrentProcess()->GetSwitchValuePath(
switches::kUseFileForFakeAudioCapture);
CHECK(!path_to_wav_file.empty())
<< "You must pass the file to use as argument to --"
<< switches::kUseFileForFakeAudioCapture << ".";
return make_scoped_ptr(new FileSource(params_, path_to_wav_file));
}
return make_scoped_ptr(new BeepingSource(params_));
}
void FakeAudioInputStream::BeepOnce() {
BeepingSource::BeepOnce();
}
} // namespace media
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