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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/browser/renderer_host/media/audio_input_device_manager_event_handler.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"
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() {
}
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() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(listener_);
device_loop_->PostTask(
FROM_HERE,
base::Bind(&AudioInputDeviceManager::EnumerateOnDeviceThread, this));
}
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_);
// Check if the device has been stopped, if not, send stop signal.
EventHandlerMap::iterator it = event_handlers_.find(session_id);
if (it != event_handlers_.end()) {
it->second->OnDeviceStopped(session_id);
event_handlers_.erase(it);
}
device_loop_->PostTask(
FROM_HERE,
base::Bind(&AudioInputDeviceManager::CloseOnDeviceThread,
this, session_id));
}
void AudioInputDeviceManager::Start(
int session_id, AudioInputDeviceManagerEventHandler* handler) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(handler);
// Solution for not using MediaStreamManager. This is needed when Start() is
// called without using Open(), we post default device for test purpose.
// And we do not store the info for the kFakeOpenSessionId but return
// the callback immediately.
if (session_id == kFakeOpenSessionId) {
handler->OnDeviceStarted(session_id,
media::AudioManagerBase::kDefaultDeviceId);
return;
}
// Look up the device_id of the session so we can notify the renderer that
// the device has started. If the session has not been started,
// use the empty device_id to indicate that Start() failed.
std::string device_id;
if (event_handlers_.insert(std::make_pair(session_id, handler)).second) {
StreamDeviceMap::const_iterator it = devices_.find(session_id);
if (it != devices_.end())
device_id = it->second.device.id;
}
// Post a callback through the AudioInputRendererHost to notify the renderer
// that the device has started.
handler->OnDeviceStarted(session_id, device_id);
}
void AudioInputDeviceManager::Stop(int session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Erase the event handler referenced by the session_id.
event_handlers_.erase(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() {
DCHECK(IsOnDeviceThread());
// AudioManager is guaranteed to outlive MediaStreamManager in
// BrowserMainloop.
media::AudioDeviceNames device_names;
audio_manager_->GetAudioInputDeviceNames(&device_names);
StreamDeviceInfoArray* devices = new StreamDeviceInfoArray;
for (media::AudioDeviceNames::iterator it = device_names.begin();
it != device_names.end();
++it) {
// NOTE: Only support enumeration of the MEDIA_DEVICE_AUDIO_CAPTURE type.
devices->push_back(StreamDeviceInfo(
MEDIA_DEVICE_AUDIO_CAPTURE, 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,
devices));
}
void AudioInputDeviceManager::OpenOnDeviceThread(
int session_id, const StreamDeviceInfo& device) {
DCHECK(IsOnDeviceThread());
// Add the session_id and device to the map.
if (!devices_.insert(std::make_pair(session_id, device)).second) {
NOTREACHED();
devices_[session_id] = device;
}
// 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,
device.device.type, session_id));
}
void AudioInputDeviceManager::CloseOnDeviceThread(int session_id) {
DCHECK(IsOnDeviceThread());
StreamDeviceMap::iterator it = devices_.find(session_id);
if (it == devices_.end())
return;
const MediaStreamType stream_type = it->second.device.type;
devices_.erase(it);
// Post a callback through the listener on IO thread since
// MediaStreamManager handles the callback asynchronously.
BrowserThread::PostTask(BrowserThread::IO,
FROM_HERE,
base::Bind(&AudioInputDeviceManager::ClosedOnIOThread,
this,
stream_type, session_id));
}
void AudioInputDeviceManager::DevicesEnumeratedOnIOThread(
StreamDeviceInfoArray* devices) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Ensure that |devices| gets deleted on exit.
scoped_ptr<StreamDeviceInfoArray> devices_array(devices);
if (listener_) {
// NOTE: Only support enumeration of the MEDIA_DEVICE_AUDIO_CAPTURE type.
listener_->DevicesEnumerated(MEDIA_DEVICE_AUDIO_CAPTURE, *devices_array);
}
}
void AudioInputDeviceManager::OpenedOnIOThread(MediaStreamType stream_type,
int session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
if (listener_)
listener_->Opened(stream_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();
}
} // namespace content
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