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// Copyright (c) 2011 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 "media/audio/audio_manager_base.h"
using content::BrowserThread;
namespace media_stream {
const int AudioInputDeviceManager::kFakeOpenSessionId = 1;
const int AudioInputDeviceManager::kInvalidSessionId = 0;
const char AudioInputDeviceManager::kInvalidDeviceId[] = "";
// Starting id for the first capture session.
const int kFirstSessionId = AudioInputDeviceManager::kFakeOpenSessionId + 1;
AudioInputDeviceManager::AudioInputDeviceManager()
: listener_(NULL),
next_capture_session_id_(kFirstSessionId) {
}
AudioInputDeviceManager::~AudioInputDeviceManager() {
}
void AudioInputDeviceManager::Register(MediaStreamProviderListener* listener) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(!listener_);
listener_ = listener;
}
void AudioInputDeviceManager::Unregister() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(listener_);
listener_ = NULL;
}
void AudioInputDeviceManager::EnumerateDevices() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(listener_);
media::AudioDeviceNames device_names;
AudioManager::GetAudioManager()->GetAudioInputDeviceNames(&device_names);
StreamDeviceInfoArray* devices = new StreamDeviceInfoArray;
for (media::AudioDeviceNames::iterator it = device_names.begin();
it != device_names.end();
++it) {
devices->push_back(StreamDeviceInfo(kAudioCapture, it->device_name,
it->unique_id, false));
}
// Returns 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,
base::Unretained(this),
devices));
}
int AudioInputDeviceManager::Open(const StreamDeviceInfo& device) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Generates a new id for this device.
int session_id = next_capture_session_id_++;
DCHECK(devices_.find(session_id) == devices_.end());
media::AudioDeviceName audio_input_device_name;
audio_input_device_name.device_name = device.name;
audio_input_device_name.unique_id = device.device_id;
// Adds the session_id and device to the list.
devices_[session_id] = audio_input_device_name;
// Returns 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,
base::Unretained(this),
session_id));
return session_id;
}
void AudioInputDeviceManager::Close(int session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(listener_);
if (devices_.find(session_id) != devices_.end())
devices_.erase(session_id);
// Checks 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(session_id);
}
// Posts a callback through the listener on IO thread since
// MediaStreamManager handles the callback asynchronously.
BrowserThread::PostTask(BrowserThread::IO,
FROM_HERE,
base::Bind(&AudioInputDeviceManager::ClosedOnIOThread,
base::Unretained(this),
session_id));
}
void AudioInputDeviceManager::Start(
int session_id, AudioInputDeviceManagerEventHandler* event_handler) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(event_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) {
event_handler->OnDeviceStarted(session_id,
AudioManagerBase::kDefaultDeviceId);
return;
}
// Checks if the device has been opened or not.
std::string device_id = (devices_.find(session_id) == devices_.end()) ?
kInvalidDeviceId : devices_[session_id].unique_id;
// Adds the event handler to the session if the session has not been started,
// otherwise post a |kInvalidDeviceId| to indicate that Start() fails.
if (event_handlers_.find(session_id) == event_handlers_.end())
event_handlers_.insert(std::make_pair(session_id, event_handler));
else
device_id = kInvalidDeviceId;
// Posts a callback through the AudioInputRendererHost to notify the renderer
// that the device has started.
event_handler->OnDeviceStarted(session_id, device_id);
}
void AudioInputDeviceManager::Stop(int session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Erases the event handler referenced by the session_id.
event_handlers_.erase(session_id);
}
void AudioInputDeviceManager::DevicesEnumeratedOnIOThread(
StreamDeviceInfoArray* devices) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Ensures that |devices| gets deleted on exit.
scoped_ptr<StreamDeviceInfoArray> devices_array(devices);
if (listener_)
listener_->DevicesEnumerated(kAudioCapture, *devices_array);
}
void AudioInputDeviceManager::OpenedOnIOThread(int session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
if (listener_)
listener_->Opened(kAudioCapture, session_id);
}
void AudioInputDeviceManager::ClosedOnIOThread(int session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
if (listener_)
listener_->Closed(kAudioCapture, session_id);
}
} // namespace media_stream
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