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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 "content/browser/renderer_host/media/audio_input_device_manager.h"
#include "base/bind.h"
#include "base/memory/scoped_ptr.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/common/media_stream_request.h"
#include "media/audio/audio_device_name.h"
#include "media/audio/audio_input_ipc.h"
#include "media/audio/audio_manager_base.h"
#include "media/audio/audio_parameters.h"
#include "media/base/channel_layout.h"
namespace content {
const int AudioInputDeviceManager::kFakeOpenSessionId = 1;
namespace {
// Starting id for the first capture session.
const int kFirstSessionId = AudioInputDeviceManager::kFakeOpenSessionId + 1;
}
AudioInputDeviceManager::AudioInputDeviceManager(
media::AudioManager* audio_manager)
: listener_(NULL),
next_capture_session_id_(kFirstSessionId),
use_fake_device_(false),
audio_manager_(audio_manager) {
}
AudioInputDeviceManager::~AudioInputDeviceManager() {
}
const StreamDeviceInfo* AudioInputDeviceManager::GetOpenedDeviceInfoById(
int session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
StreamDeviceList::iterator device = GetDevice(session_id);
if (device == devices_.end())
return NULL;
return &(*device);
}
void AudioInputDeviceManager::Register(
MediaStreamProviderListener* listener,
base::MessageLoopProxy* device_thread_loop) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(!listener_);
DCHECK(!device_loop_);
listener_ = listener;
device_loop_ = device_thread_loop;
}
void AudioInputDeviceManager::Unregister() {
DCHECK(listener_);
listener_ = NULL;
}
void AudioInputDeviceManager::EnumerateDevices(MediaStreamType stream_type) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(listener_);
device_loop_->PostTask(
FROM_HERE,
base::Bind(&AudioInputDeviceManager::EnumerateOnDeviceThread,
this, stream_type));
}
int AudioInputDeviceManager::Open(const StreamDeviceInfo& device) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Generate a new id for this device.
int session_id = next_capture_session_id_++;
device_loop_->PostTask(
FROM_HERE,
base::Bind(&AudioInputDeviceManager::OpenOnDeviceThread,
this, session_id, device));
return session_id;
}
void AudioInputDeviceManager::Close(int session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(listener_);
StreamDeviceList::iterator device = GetDevice(session_id);
if (device == devices_.end())
return;
const MediaStreamType stream_type = device->device.type;
devices_.erase(device);
// Post a callback through the listener on IO thread since
// MediaStreamManager is expecting the callback asynchronously.
BrowserThread::PostTask(BrowserThread::IO,
FROM_HERE,
base::Bind(&AudioInputDeviceManager::ClosedOnIOThread,
this, stream_type, session_id));
}
void AudioInputDeviceManager::UseFakeDevice() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
use_fake_device_ = true;
}
bool AudioInputDeviceManager::ShouldUseFakeDevice() const {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
return use_fake_device_;
}
void AudioInputDeviceManager::EnumerateOnDeviceThread(
MediaStreamType stream_type) {
DCHECK(IsOnDeviceThread());
media::AudioDeviceNames device_names;
switch (stream_type) {
case MEDIA_DEVICE_AUDIO_CAPTURE:
// AudioManager is guaranteed to outlive MediaStreamManager in
// BrowserMainloop.
audio_manager_->GetAudioInputDeviceNames(&device_names);
break;
default:
NOTREACHED();
break;
}
scoped_ptr<StreamDeviceInfoArray> devices(new StreamDeviceInfoArray());
for (media::AudioDeviceNames::iterator it = device_names.begin();
it != device_names.end(); ++it) {
// Add device information to device vector.
devices->push_back(StreamDeviceInfo(
stream_type, it->device_name, it->unique_id, false));
}
// Return the device list through the listener by posting a task on
// IO thread since MediaStreamManager handles the callback asynchronously.
BrowserThread::PostTask(
BrowserThread::IO,
FROM_HERE,
base::Bind(&AudioInputDeviceManager::DevicesEnumeratedOnIOThread,
this, stream_type, base::Passed(&devices)));
}
void AudioInputDeviceManager::OpenOnDeviceThread(
int session_id, const StreamDeviceInfo& info) {
DCHECK(IsOnDeviceThread());
// Get the preferred sample rate and channel configuration for the
// audio device.
media::AudioParameters params =
audio_manager_->GetInputStreamParameters(info.device.id);
StreamDeviceInfo out(info.device.type, info.device.name, info.device.id,
params.sample_rate(), params.channel_layout(), false);
out.session_id = session_id;
// Return the |session_id| through the listener by posting a task on
// IO thread since MediaStreamManager handles the callback asynchronously.
BrowserThread::PostTask(BrowserThread::IO,
FROM_HERE,
base::Bind(&AudioInputDeviceManager::OpenedOnIOThread,
this, session_id, out));
}
void AudioInputDeviceManager::DevicesEnumeratedOnIOThread(
MediaStreamType stream_type,
scoped_ptr<StreamDeviceInfoArray> devices) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Ensure that |devices| gets deleted on exit.
if (listener_)
listener_->DevicesEnumerated(stream_type, *devices);
}
void AudioInputDeviceManager::OpenedOnIOThread(int session_id,
const StreamDeviceInfo& info) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK_EQ(session_id, info.session_id);
DCHECK(GetDevice(session_id) == devices_.end());
devices_.push_back(info);
if (listener_)
listener_->Opened(info.device.type, session_id);
}
void AudioInputDeviceManager::ClosedOnIOThread(MediaStreamType stream_type,
int session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
if (listener_)
listener_->Closed(stream_type, session_id);
}
bool AudioInputDeviceManager::IsOnDeviceThread() const {
return device_loop_->BelongsToCurrentThread();
}
AudioInputDeviceManager::StreamDeviceList::iterator
AudioInputDeviceManager::GetDevice(int session_id) {
for (StreamDeviceList::iterator i(devices_.begin()); i != devices_.end();
++i) {
if (i->session_id == session_id)
return i;
}
return devices_.end();
}
} // namespace content
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