// 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/media_stream_manager.h"
#include <list>
#include <vector>
#include "base/bind.h"
#include "base/command_line.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/power_monitor/power_monitor.h"
#include "base/rand_util.h"
#include "base/run_loop.h"
#include "base/strings/stringprintf.h"
#include "base/threading/thread.h"
#include "content/browser/browser_main_loop.h"
#include "content/browser/media/capture/web_contents_capture_util.h"
#include "content/browser/renderer_host/media/audio_input_device_manager.h"
#include "content/browser/renderer_host/media/device_request_message_filter.h"
#include "content/browser/renderer_host/media/media_capture_devices_impl.h"
#include "content/browser/renderer_host/media/media_stream_requester.h"
#include "content/browser/renderer_host/media/media_stream_ui_proxy.h"
#include "content/browser/renderer_host/media/video_capture_manager.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/media_device_id.h"
#include "content/public/browser/media_observer.h"
#include "content/public/browser/media_request_state.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/media_stream_request.h"
#include "media/audio/audio_manager_base.h"
#include "media/audio/audio_parameters.h"
#include "media/base/channel_layout.h"
#include "url/gurl.h"
#if defined(OS_WIN)
#include "base/win/scoped_com_initializer.h"
#endif
namespace content {
// Forward declaration of DeviceMonitorMac and its only useable method.
class DeviceMonitorMac {
public:
void StartMonitoring();
};
namespace {
// Creates a random label used to identify requests.
std::string RandomLabel() {
// An earlier PeerConnection spec,
// http://dev.w3.org/2011/webrtc/editor/webrtc.html, specified the
// MediaStream::label alphabet as containing 36 characters from
// range: U+0021, U+0023 to U+0027, U+002A to U+002B, U+002D to U+002E,
// U+0030 to U+0039, U+0041 to U+005A, U+005E to U+007E.
// Here we use a safe subset.
static const char kAlphabet[] = "0123456789"
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
std::string label(36, ' ');
for (size_t i = 0; i < label.size(); ++i) {
int random_char = base::RandGenerator(sizeof(kAlphabet) - 1);
label[i] = kAlphabet[random_char];
}
return label;
}
void ParseStreamType(const StreamOptions& options,
MediaStreamType* audio_type,
MediaStreamType* video_type) {
*audio_type = MEDIA_NO_SERVICE;
*video_type = MEDIA_NO_SERVICE;
if (options.audio_requested) {
std::string audio_stream_source;
bool mandatory = false;
if (options.GetFirstAudioConstraintByName(kMediaStreamSource,
&audio_stream_source,
&mandatory)) {
DCHECK(mandatory);
// This is tab or screen capture.
if (audio_stream_source == kMediaStreamSourceTab) {
*audio_type = content::MEDIA_TAB_AUDIO_CAPTURE;
} else if (audio_stream_source == kMediaStreamSourceSystem) {
*audio_type = content::MEDIA_LOOPBACK_AUDIO_CAPTURE;
}
} else {
// This is normal audio device capture.
*audio_type = MEDIA_DEVICE_AUDIO_CAPTURE;
}
}
if (options.video_requested) {
std::string video_stream_source;
bool mandatory = false;
if (options.GetFirstVideoConstraintByName(kMediaStreamSource,
&video_stream_source,
&mandatory)) {
DCHECK(mandatory);
// This is tab or screen capture.
if (video_stream_source == kMediaStreamSourceTab) {
*video_type = content::MEDIA_TAB_VIDEO_CAPTURE;
} else if (video_stream_source == kMediaStreamSourceScreen) {
*video_type = content::MEDIA_DESKTOP_VIDEO_CAPTURE;
} else if (video_stream_source == kMediaStreamSourceDesktop) {
*video_type = content::MEDIA_DESKTOP_VIDEO_CAPTURE;
}
} else {
// This is normal video device capture.
*video_type = MEDIA_DEVICE_VIDEO_CAPTURE;
}
}
}
// Private helper method for SendMessageToNativeLog() that obtains the global
// MediaStreamManager instance on the UI thread before sending |message| to the
// webrtcLoggingPrivate API.
void DoAddLogMessage(const std::string& message) {
// Must be on the UI thread to access BrowserMainLoop.
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
// May be null in tests.
// TODO(vrk): Handle this more elegantly by having native log messages become
// no-ops until MediaStreamManager is aware that a renderer process has
// started logging. crbug.com/333894
if (content::BrowserMainLoop::GetInstance()) {
BrowserThread::PostTask(
BrowserThread::IO,
FROM_HERE,
base::Bind(&MediaStreamManager::AddLogMessageOnIOThread,
base::Unretained(content::BrowserMainLoop::GetInstance()
->media_stream_manager()),
message));
}
}
// Private helper method to generate a string for the log message that lists the
// human readable names of |devices|.
std::string GetLogMessageString(MediaStreamType stream_type,
const StreamDeviceInfoArray& devices) {
std::string output_string =
base::StringPrintf("Getting devices for stream type %d:\n", stream_type);
if (devices.empty()) {
output_string += "No devices found.";
} else {
for (StreamDeviceInfoArray::const_iterator it = devices.begin();
it != devices.end(); ++it) {
output_string += " " + it->device.name + "\n";
}
}
return output_string;
}
// Needed for MediaStreamManager::GenerateStream below.
std::string ReturnEmptySalt() {
return std::string();
}
} // namespace
// MediaStreamManager::DeviceRequest represents a request to either enumerate
// available devices or open one or more devices.
// TODO(perkj): MediaStreamManager still needs refactoring. I propose we create
// several subclasses of DeviceRequest and move some of the responsibility of
// the MediaStreamManager to the subclasses to get rid of the way too many if
// statements in MediaStreamManager.
class MediaStreamManager::DeviceRequest {
public:
DeviceRequest(MediaStreamRequester* requester,
int requesting_process_id,
int requesting_view_id,
int page_request_id,
const GURL& security_origin,
bool user_gesture,
MediaStreamRequestType request_type,
const StreamOptions& options,
const ResourceContext::SaltCallback& salt_callback)
: requester(requester),
requesting_process_id(requesting_process_id),
requesting_view_id(requesting_view_id),
page_request_id(page_request_id),
security_origin(security_origin),
user_gesture(user_gesture),
request_type(request_type),
options(options),
salt_callback(salt_callback),
state_(NUM_MEDIA_TYPES, MEDIA_REQUEST_STATE_NOT_REQUESTED),
audio_type_(MEDIA_NO_SERVICE),
video_type_(MEDIA_NO_SERVICE) {
}
~DeviceRequest() {}
void SetAudioType(MediaStreamType audio_type) {
DCHECK(IsAudioMediaType(audio_type) || audio_type == MEDIA_NO_SERVICE);
audio_type_ = audio_type;
}
MediaStreamType audio_type() const { return audio_type_; }
void SetVideoType(MediaStreamType video_type) {
DCHECK(IsVideoMediaType(video_type) || video_type == MEDIA_NO_SERVICE);
video_type_ = video_type;
}
MediaStreamType video_type() const { return video_type_; }
// Creates a MediaStreamRequest object that is used by this request when UI
// is asked for permission and device selection.
void CreateUIRequest(const std::string& requested_audio_device_id,
const std::string& requested_video_device_id) {
DCHECK(!ui_request_);
ui_request_.reset(new MediaStreamRequest(requesting_process_id,
requesting_view_id,
page_request_id,
security_origin,
user_gesture,
request_type,
requested_audio_device_id,
requested_video_device_id,
audio_type_,
video_type_));
}
// Creates a tab capture specific MediaStreamRequest object that is used by
// this request when UI is asked for permission and device selection.
void CreateTabCatureUIRequest(int target_render_process_id,
int target_render_view_id,
const std::string& tab_capture_id) {
DCHECK(!ui_request_);
ui_request_.reset(new MediaStreamRequest(target_render_process_id,
target_render_view_id,
page_request_id,
security_origin,
user_gesture,
request_type,
"",
"",
audio_type_,
video_type_));
ui_request_->tab_capture_device_id = tab_capture_id;
}
const MediaStreamRequest* UIRequest() const { return ui_request_.get(); }
// Update the request state and notify observers.
void SetState(MediaStreamType stream_type, MediaRequestState new_state) {
if (stream_type == NUM_MEDIA_TYPES) {
for (int i = MEDIA_NO_SERVICE + 1; i < NUM_MEDIA_TYPES; ++i) {
const MediaStreamType stream_type = static_cast<MediaStreamType>(i);
state_[stream_type] = new_state;
}
} else {
state_[stream_type] = new_state;
}
MediaObserver* media_observer =
GetContentClient()->browser()->GetMediaObserver();
if (!media_observer)
return;
// If |ui_request_| doesn't exist, it means that the request has not yet
// been setup fully and there are no valid observers.
if (!ui_request_)
return;
// If we appended a device_id scheme, we want to remove it when notifying
// observers which may be in different modules since this scheme is only
// used internally within the content module.
std::string device_id =
WebContentsCaptureUtil::StripWebContentsDeviceScheme(
ui_request_->tab_capture_device_id);
media_observer->OnMediaRequestStateChanged(
ui_request_->render_process_id, ui_request_->render_view_id,
ui_request_->page_request_id, ui_request_->security_origin,
MediaStreamDevice(stream_type, device_id, device_id), new_state);
}
MediaRequestState state(MediaStreamType stream_type) const {
return state_[stream_type];
}
MediaStreamRequester* const requester; // Can be NULL.
// The render process id that requested this stream to be generated and that
// will receive a handle to the MediaStream. This may be different from
// MediaStreamRequest::render_process_id which in the tab capture case
// specifies the target renderer from which audio and video is captured.
const int requesting_process_id;
// The render view id that requested this stream to be generated and that
// will receive a handle to the MediaStream. This may be different from
// MediaStreamRequest::render_view_id which in the tab capture case
// specifies the target renderer from which audio and video is captured.
const int requesting_view_id;
// An ID the render view provided to identify this request.
const int page_request_id;
const GURL security_origin;
const bool user_gesture;
const MediaStreamRequestType request_type;
const StreamOptions options;
ResourceContext::SaltCallback salt_callback;
StreamDeviceInfoArray devices;
// Callback to the requester which audio/video devices have been selected.
// It can be null if the requester has no interest to know the result.
// Currently it is only used by |DEVICE_ACCESS| type.
MediaStreamManager::MediaRequestResponseCallback callback;
scoped_ptr<MediaStreamUIProxy> ui_proxy;
private:
std::vector<MediaRequestState> state_;
scoped_ptr<MediaStreamRequest> ui_request_;
MediaStreamType audio_type_;
MediaStreamType video_type_;
};
MediaStreamManager::EnumerationCache::EnumerationCache()
: valid(false) {
}
MediaStreamManager::EnumerationCache::~EnumerationCache() {
}
MediaStreamManager::MediaStreamManager()
: audio_manager_(NULL),
monitoring_started_(false),
io_loop_(NULL),
use_fake_ui_(false) {}
MediaStreamManager::MediaStreamManager(media::AudioManager* audio_manager)
: audio_manager_(audio_manager),
monitoring_started_(false),
io_loop_(NULL),
use_fake_ui_(false) {
DCHECK(audio_manager_);
memset(active_enumeration_ref_count_, 0,
sizeof(active_enumeration_ref_count_));
// Some unit tests create the MSM in the IO thread and assumes the
// initialization is done synchronously.
if (BrowserThread::CurrentlyOn(BrowserThread::IO)) {
InitializeDeviceManagersOnIOThread();
} else {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&MediaStreamManager::InitializeDeviceManagersOnIOThread,
base::Unretained(this)));
}
base::PowerMonitor* power_monitor = base::PowerMonitor::Get();
// BrowserMainLoop always creates the PowerMonitor instance before creating
// MediaStreamManager, but power_monitor may be NULL in unit tests.
if (power_monitor)
power_monitor->AddObserver(this);
}
MediaStreamManager::~MediaStreamManager() {
DVLOG(1) << "~MediaStreamManager";
DCHECK(requests_.empty());
DCHECK(!device_task_runner_);
base::PowerMonitor* power_monitor = base::PowerMonitor::Get();
// The PowerMonitor instance owned by BrowserMainLoops always outlives the
// MediaStreamManager, but it may be NULL in unit tests.
if (power_monitor)
power_monitor->RemoveObserver(this);
}
VideoCaptureManager* MediaStreamManager::video_capture_manager() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(video_capture_manager_.get());
return video_capture_manager_.get();
}
AudioInputDeviceManager* MediaStreamManager::audio_input_device_manager() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(audio_input_device_manager_.get());
return audio_input_device_manager_.get();
}
std::string MediaStreamManager::MakeMediaAccessRequest(
int render_process_id,
int render_view_id,
int page_request_id,
const StreamOptions& options,
const GURL& security_origin,
const MediaRequestResponseCallback& callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// TODO(perkj): The argument list with NULL parameters to DeviceRequest
// suggests that this is the wrong design. Can this be refactored?
DeviceRequest* request = new DeviceRequest(NULL,
render_process_id,
render_view_id,
page_request_id,
security_origin,
false, // user gesture
MEDIA_DEVICE_ACCESS,
options,
base::Bind(&ReturnEmptySalt));
const std::string& label = AddRequest(request);
request->callback = callback;
// Post a task and handle the request asynchronously. The reason is that the
// requester won't have a label for the request until this function returns
// and thus can not handle a response. Using base::Unretained is safe since
// MediaStreamManager is deleted on the UI thread, after the IO thread has
// been stopped.
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&MediaStreamManager::SetupRequest,
base::Unretained(this), label));
return label;
}
void MediaStreamManager::GenerateStream(MediaStreamRequester* requester,
int render_process_id,
int render_view_id,
const ResourceContext::SaltCallback& sc,
int page_request_id,
const StreamOptions& options,
const GURL& security_origin,
bool user_gesture) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DVLOG(1) << "GenerateStream()";
if (CommandLine::ForCurrentProcess()->HasSwitch(
switches::kUseFakeUIForMediaStream)) {
UseFakeUI(scoped_ptr<FakeMediaStreamUIProxy>());
}
DeviceRequest* request = new DeviceRequest(requester,
render_process_id,
render_view_id,
page_request_id,
security_origin,
user_gesture,
MEDIA_GENERATE_STREAM,
options,
sc);
const std::string& label = AddRequest(request);
// Post a task and handle the request asynchronously. The reason is that the
// requester won't have a label for the request until this function returns
// and thus can not handle a response. Using base::Unretained is safe since
// MediaStreamManager is deleted on the UI thread, after the IO thread has
// been stopped.
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&MediaStreamManager::SetupRequest,
base::Unretained(this), label));
}
void MediaStreamManager::CancelRequest(int render_process_id,
int render_view_id,
int page_request_id) {
for (DeviceRequests::const_iterator request_it = requests_.begin();
request_it != requests_.end(); ++request_it) {
const DeviceRequest* request = request_it->second;
if (request->requesting_process_id == render_process_id &&
request->requesting_view_id == render_view_id &&
request->page_request_id == page_request_id) {
CancelRequest(request_it->first);
return;
}
}
NOTREACHED();
}
void MediaStreamManager::CancelRequest(const std::string& label) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DVLOG(1) << "CancelRequest({label = " << label << "})";
DeviceRequest* request = FindRequest(label);
if (!request) {
// The request does not exist.
LOG(ERROR) << "The request with label = " << label << " does not exist.";
return;
}
if (request->request_type == MEDIA_ENUMERATE_DEVICES) {
// It isn't an ideal use of "CancelRequest" to make it a requirement
// for enumeration requests to be deleted via "CancelRequest" _after_
// the request has been successfully fulfilled.
// See note in FinalizeEnumerateDevices for a recommendation on how
// we should refactor this.
DeleteRequest(label);
return;
}
// This is a request for opening one or more devices.
for (StreamDeviceInfoArray::iterator device_it = request->devices.begin();
device_it != request->devices.end(); ++device_it) {
MediaRequestState state = request->state(device_it->device.type);
// If we have not yet requested the device to be opened - just ignore it.
if (state != MEDIA_REQUEST_STATE_OPENING &&
state != MEDIA_REQUEST_STATE_DONE) {
continue;
}
// Stop the opening/opened devices of the requests.
CloseDevice(device_it->device.type, device_it->session_id);
}
// Cancel the request if still pending at UI side.
request->SetState(NUM_MEDIA_TYPES, MEDIA_REQUEST_STATE_CLOSING);
DeleteRequest(label);
}
void MediaStreamManager::CancelAllRequests(int render_process_id) {
DeviceRequests::iterator request_it = requests_.begin();
while (request_it != requests_.end()) {
if (request_it->second->requesting_process_id != render_process_id) {
++request_it;
continue;
}
std::string label = request_it->first;
++request_it;
CancelRequest(label);
}
}
void MediaStreamManager::StopStreamDevice(int render_process_id,
int render_view_id,
const std::string& device_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DVLOG(1) << "StopStreamDevice({render_view_id = " << render_view_id << "} "
<< ", {device_id = " << device_id << "})";
// Find the first request for this |render_process_id| and |render_view_id|
// of type MEDIA_GENERATE_STREAM that has requested to use |device_id| and
// stop it.
for (DeviceRequests::iterator request_it = requests_.begin();
request_it != requests_.end(); ++request_it) {
DeviceRequest* request = request_it->second;
if (request->requesting_process_id != render_process_id ||
request->requesting_view_id != render_view_id ||
request->request_type != MEDIA_GENERATE_STREAM) {
continue;
}
StreamDeviceInfoArray& devices = request->devices;
for (StreamDeviceInfoArray::iterator device_it = devices.begin();
device_it != devices.end(); ++device_it) {
if (device_it->device.id == device_id) {
StopDevice(device_it->device.type, device_it->session_id);
return;
}
}
}
}
void MediaStreamManager::StopDevice(MediaStreamType type, int session_id) {
DVLOG(1) << "StopDevice"
<< "{type = " << type << "}"
<< "{session_id = " << session_id << "}";
DeviceRequests::iterator request_it = requests_.begin();
while (request_it != requests_.end()) {
DeviceRequest* request = request_it->second;
StreamDeviceInfoArray* devices = &request->devices;
if (devices->empty()) {
// There is no device in use yet by this request.
++request_it;
continue;
}
StreamDeviceInfoArray::iterator device_it = devices->begin();
while (device_it != devices->end()) {
if (device_it->device.type != type ||
device_it->session_id != session_id) {
++device_it;
continue;
}
if (request->state(type) == MEDIA_REQUEST_STATE_DONE)
CloseDevice(type, session_id);
device_it = devices->erase(device_it);
}
// If this request doesn't have any active devices after a device
// has been stopped above, remove the request. Note that the request is
// only deleted if a device as been removed from |devices|.
if (devices->empty()) {
std::string label = request_it->first;
++request_it;
DeleteRequest(label);
} else {
++request_it;
}
}
}
void MediaStreamManager::CloseDevice(MediaStreamType type, int session_id) {
DVLOG(1) << "CloseDevice("
<< "{type = " << type << "} "
<< "{session_id = " << session_id << "})";
GetDeviceManager(type)->Close(session_id);
for (DeviceRequests::iterator request_it = requests_.begin();
request_it != requests_.end() ; ++request_it) {
StreamDeviceInfoArray* devices = &request_it->second->devices;
for (StreamDeviceInfoArray::iterator device_it = devices->begin();
device_it != devices->end(); ++device_it) {
if (device_it->session_id == session_id &&
device_it->device.type == type) {
// Notify observers that this device is being closed.
// Note that only one device per type can be opened.
request_it->second->SetState(type, MEDIA_REQUEST_STATE_CLOSING);
}
}
}
}
std::string MediaStreamManager::EnumerateDevices(
MediaStreamRequester* requester,
int render_process_id,
int render_view_id,
const ResourceContext::SaltCallback& sc,
int page_request_id,
MediaStreamType type,
const GURL& security_origin) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(requester);
DCHECK(type == MEDIA_DEVICE_AUDIO_CAPTURE ||
type == MEDIA_DEVICE_VIDEO_CAPTURE);
DeviceRequest* request = new DeviceRequest(requester,
render_process_id,
render_view_id,
page_request_id,
security_origin,
false, // user gesture
MEDIA_ENUMERATE_DEVICES,
StreamOptions(),
sc);
if (IsAudioMediaType(type))
request->SetAudioType(type);
else if (IsVideoMediaType(type))
request->SetVideoType(type);
const std::string& label = AddRequest(request);
// Post a task and handle the request asynchronously. The reason is that the
// requester won't have a label for the request until this function returns
// and thus can not handle a response. Using base::Unretained is safe since
// MediaStreamManager is deleted on the UI thread, after the IO thread has
// been stopped.
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&MediaStreamManager::DoEnumerateDevices,
base::Unretained(this), label));
return label;
}
void MediaStreamManager::DoEnumerateDevices(const std::string& label) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DeviceRequest* request = FindRequest(label);
if (!request)
return; // This can happen if the request has been canceled.
MediaStreamType type;
EnumerationCache* cache;
if (request->audio_type() == MEDIA_DEVICE_AUDIO_CAPTURE) {
DCHECK_EQ(MEDIA_NO_SERVICE, request->video_type());
type = MEDIA_DEVICE_AUDIO_CAPTURE;
cache = &audio_enumeration_cache_;
} else {
DCHECK_EQ(MEDIA_DEVICE_VIDEO_CAPTURE, request->video_type());
type = MEDIA_DEVICE_VIDEO_CAPTURE;
cache = &video_enumeration_cache_;
}
if (!EnumerationRequired(cache, type)) {
// Cached device list of this type exists. Just send it out.
request->SetState(type, MEDIA_REQUEST_STATE_REQUESTED);
request->devices = cache->devices;
FinalizeEnumerateDevices(label, request);
} else {
StartEnumeration(request);
}
DVLOG(1) << "Enumerate Devices ({label = " << label << "})";
}
void MediaStreamManager::OpenDevice(MediaStreamRequester* requester,
int render_process_id,
int render_view_id,
const ResourceContext::SaltCallback& sc,
int page_request_id,
const std::string& device_id,
MediaStreamType type,
const GURL& security_origin) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(type == MEDIA_DEVICE_AUDIO_CAPTURE ||
type == MEDIA_DEVICE_VIDEO_CAPTURE);
DVLOG(1) << "OpenDevice ({page_request_id = " << page_request_id << "})";
StreamOptions options;
if (IsAudioMediaType(type)) {
options.audio_requested = true;
options.mandatory_audio.push_back(
StreamOptions::Constraint(kMediaStreamSourceInfoId, device_id));
} else if (IsVideoMediaType(type)) {
options.video_requested = true;
options.mandatory_video.push_back(
StreamOptions::Constraint(kMediaStreamSourceInfoId, device_id));
} else {
NOTREACHED();
}
DeviceRequest* request = new DeviceRequest(requester,
render_process_id,
render_view_id,
page_request_id,
security_origin,
false, // user gesture
MEDIA_OPEN_DEVICE,
options,
sc);
const std::string& label = AddRequest(request);
// Post a task and handle the request asynchronously. The reason is that the
// requester won't have a label for the request until this function returns
// and thus can not handle a response. Using base::Unretained is safe since
// MediaStreamManager is deleted on the UI thread, after the IO thread has
// been stopped.
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&MediaStreamManager::SetupRequest,
base::Unretained(this), label));
}
void MediaStreamManager::EnsureDeviceMonitorStarted() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
StartMonitoring();
}
void MediaStreamManager::StopRemovedDevices(
const StreamDeviceInfoArray& old_devices,
const StreamDeviceInfoArray& new_devices) {
DVLOG(1) << "StopRemovedDevices("
<< "{#old_devices = " << old_devices.size() << "} "
<< "{#new_devices = " << new_devices.size() << "})";
for (StreamDeviceInfoArray::const_iterator old_dev_it = old_devices.begin();
old_dev_it != old_devices.end(); ++old_dev_it) {
bool device_found = false;
StreamDeviceInfoArray::const_iterator new_dev_it = new_devices.begin();
for (; new_dev_it != new_devices.end(); ++new_dev_it) {
if (old_dev_it->device.id == new_dev_it->device.id) {
device_found = true;
break;
}
}
if (!device_found) {
// A device has been removed. We need to check if it is used by a
// MediaStream and in that case cleanup and notify the render process.
StopRemovedDevice(old_dev_it->device);
}
}
}
void MediaStreamManager::StopRemovedDevice(const MediaStreamDevice& device) {
std::vector<int> session_ids;
for (DeviceRequests::const_iterator it = requests_.begin();
it != requests_.end() ; ++it) {
const DeviceRequest* request = it->second;
for (StreamDeviceInfoArray::const_iterator device_it =
request->devices.begin();
device_it != request->devices.end(); ++device_it) {
std::string source_id = content::GetHMACForMediaDeviceID(
request->salt_callback,
request->security_origin,
device.id);
if (device_it->device.id == source_id &&
device_it->device.type == device.type) {
session_ids.push_back(device_it->session_id);
if (it->second->requester) {
it->second->requester->DeviceStopped(
it->second->requesting_view_id,
it->first,
*device_it);
}
}
}
}
for (std::vector<int>::const_iterator it = session_ids.begin();
it != session_ids.end(); ++it) {
StopDevice(device.type, *it);
}
}
void MediaStreamManager::StartMonitoring() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
if (monitoring_started_)
return;
if (!base::SystemMonitor::Get())
return;
monitoring_started_ = true;
base::SystemMonitor::Get()->AddDevicesChangedObserver(this);
// Enumerate both the audio and video devices to cache the device lists
// and send them to media observer.
++active_enumeration_ref_count_[MEDIA_DEVICE_AUDIO_CAPTURE];
audio_input_device_manager_->EnumerateDevices(MEDIA_DEVICE_AUDIO_CAPTURE);
++active_enumeration_ref_count_[MEDIA_DEVICE_VIDEO_CAPTURE];
video_capture_manager_->EnumerateDevices(MEDIA_DEVICE_VIDEO_CAPTURE);
#if defined(OS_MACOSX)
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&MediaStreamManager::StartMonitoringOnUIThread,
base::Unretained(this)));
#endif
}
#if defined(OS_MACOSX)
void MediaStreamManager::StartMonitoringOnUIThread() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
BrowserMainLoop* browser_main_loop = content::BrowserMainLoop::GetInstance();
if (browser_main_loop)
browser_main_loop->device_monitor_mac()->StartMonitoring();
}
#endif
void MediaStreamManager::StopMonitoring() {
DCHECK_EQ(base::MessageLoop::current(), io_loop_);
if (monitoring_started_) {
base::SystemMonitor::Get()->RemoveDevicesChangedObserver(this);
monitoring_started_ = false;
ClearEnumerationCache(&audio_enumeration_cache_);
ClearEnumerationCache(&video_enumeration_cache_);
}
}
bool MediaStreamManager::GetRequestedDeviceCaptureId(
const DeviceRequest* request,
MediaStreamType type,
std::string* device_id) const {
DCHECK(type == MEDIA_DEVICE_AUDIO_CAPTURE ||
type == MEDIA_DEVICE_VIDEO_CAPTURE);
const StreamOptions::Constraints* mandatory =
(type == MEDIA_DEVICE_AUDIO_CAPTURE) ?
&request->options.mandatory_audio : &request->options.mandatory_video;
const StreamOptions::Constraints* optional =
(type == MEDIA_DEVICE_AUDIO_CAPTURE) ?
&request->options.optional_audio : &request->options.optional_video;
std::vector<std::string> source_ids;
StreamOptions::GetConstraintsByName(*mandatory,
kMediaStreamSourceInfoId, &source_ids);
if (source_ids.size() > 1) {
LOG(ERROR) << "Only one mandatory " << kMediaStreamSourceInfoId
<< " is supported.";
return false;
}
// If a specific device has been requested we need to find the real device
// id.
if (source_ids.size() == 1 &&
!TranslateSourceIdToDeviceId(type,
request->salt_callback,
request->security_origin,
source_ids[0], device_id)) {
LOG(WARNING) << "Invalid mandatory " << kMediaStreamSourceInfoId
<< " = " << source_ids[0] << ".";
return false;
}
// Check for optional audio sourceIDs.
if (device_id->empty()) {
StreamOptions::GetConstraintsByName(*optional,
kMediaStreamSourceInfoId,
&source_ids);
// Find the first sourceID that translates to device. Note that only one
// device per type can call to GenerateStream is ever opened.
for (std::vector<std::string>::const_iterator it = source_ids.begin();
it != source_ids.end(); ++it) {
if (TranslateSourceIdToDeviceId(type,
request->salt_callback,
request->security_origin,
*it,
device_id)) {
break;
}
}
}
return true;
}
void MediaStreamManager::TranslateDeviceIdToSourceId(
DeviceRequest* request,
MediaStreamDevice* device) {
if (request->audio_type() == MEDIA_DEVICE_AUDIO_CAPTURE ||
request->video_type() == MEDIA_DEVICE_VIDEO_CAPTURE) {
device->id = content::GetHMACForMediaDeviceID(
request->salt_callback,
request->security_origin,
device->id);
}
}
bool MediaStreamManager::TranslateSourceIdToDeviceId(
MediaStreamType stream_type,
const ResourceContext::SaltCallback& sc,
const GURL& security_origin,
const std::string& source_id,
std::string* device_id) const {
DCHECK(stream_type == MEDIA_DEVICE_AUDIO_CAPTURE ||
stream_type == MEDIA_DEVICE_VIDEO_CAPTURE);
// The source_id can be empty if the constraint is set but empty.
if (source_id.empty())
return false;
const EnumerationCache* cache =
stream_type == MEDIA_DEVICE_AUDIO_CAPTURE ?
&audio_enumeration_cache_ : &video_enumeration_cache_;
// If device monitoring hasn't started, the |device_guid| is not valid.
if (!cache->valid)
return false;
for (StreamDeviceInfoArray::const_iterator it = cache->devices.begin();
it != cache->devices.end();
++it) {
if (content::DoesMediaDeviceIDMatchHMAC(sc, security_origin, source_id,
it->device.id)) {
*device_id = it->device.id;
return true;
}
}
return false;
}
void MediaStreamManager::ClearEnumerationCache(EnumerationCache* cache) {
DCHECK_EQ(base::MessageLoop::current(), io_loop_);
cache->valid = false;
}
bool MediaStreamManager::EnumerationRequired(EnumerationCache* cache,
MediaStreamType stream_type) {
DCHECK_EQ(base::MessageLoop::current(), io_loop_);
if (stream_type == MEDIA_NO_SERVICE)
return false;
DCHECK(stream_type == MEDIA_DEVICE_AUDIO_CAPTURE ||
stream_type == MEDIA_DEVICE_VIDEO_CAPTURE);
#if defined(OS_ANDROID)
// There's no SystemMonitor on Android that notifies us when devices are
// added or removed, so we need to populate the cache on every request.
// Fortunately, there is an already up-to-date cache in the browser side
// audio manager that we can rely on, so the performance impact of
// invalidating the cache like this, is minimal.
if (stream_type == MEDIA_DEVICE_AUDIO_CAPTURE) {
// Make sure the cache is marked as invalid so that FinalizeEnumerateDevices
// will be called at the end of the enumeration.
ClearEnumerationCache(cache);
}
#endif
// If the cache isn't valid, we need to start a full enumeration.
return !cache->valid;
}
void MediaStreamManager::StartEnumeration(DeviceRequest* request) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Start monitoring the devices when doing the first enumeration.
StartMonitoring();
// Start enumeration for devices of all requested device types.
const MediaStreamType streams[] = { request->audio_type(),
request->video_type() };
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(streams); ++i) {
if (streams[i] == MEDIA_NO_SERVICE)
continue;
request->SetState(streams[i], MEDIA_REQUEST_STATE_REQUESTED);
DCHECK_GE(active_enumeration_ref_count_[streams[i]], 0);
if (active_enumeration_ref_count_[streams[i]] == 0) {
++active_enumeration_ref_count_[streams[i]];
GetDeviceManager(streams[i])->EnumerateDevices(streams[i]);
}
}
}
std::string MediaStreamManager::AddRequest(DeviceRequest* request) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Create a label for this request and verify it is unique.
std::string unique_label;
do {
unique_label = RandomLabel();
} while (requests_.find(unique_label) != requests_.end());
requests_.insert(std::make_pair(unique_label, request));
return unique_label;
}
MediaStreamManager::DeviceRequest*
MediaStreamManager::FindRequest(const std::string& label) const {
DeviceRequests::const_iterator request_it = requests_.find(label);
return request_it == requests_.end() ? NULL : request_it->second;
}
void MediaStreamManager::DeleteRequest(const std::string& label) {
DVLOG(1) << "DeleteRequest({label= " << label << "})";
DeviceRequests::iterator it = requests_.find(label);
scoped_ptr<DeviceRequest> request(it->second);
requests_.erase(it);
}
void MediaStreamManager::PostRequestToUI(const std::string& label,
DeviceRequest* request) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(request->UIRequest());
DVLOG(1) << "PostRequestToUI({label= " << label << "})";
const MediaStreamType audio_type = request->audio_type();
const MediaStreamType video_type = request->video_type();
// Post the request to UI and set the state.
if (IsAudioMediaType(audio_type))
request->SetState(audio_type, MEDIA_REQUEST_STATE_PENDING_APPROVAL);
if (IsVideoMediaType(video_type))
request->SetState(video_type, MEDIA_REQUEST_STATE_PENDING_APPROVAL);
if (use_fake_ui_) {
if (!fake_ui_)
fake_ui_.reset(new FakeMediaStreamUIProxy());
MediaStreamDevices devices;
if (audio_enumeration_cache_.valid) {
for (StreamDeviceInfoArray::const_iterator it =
audio_enumeration_cache_.devices.begin();
it != audio_enumeration_cache_.devices.end(); ++it) {
devices.push_back(it->device);
}
}
if (video_enumeration_cache_.valid) {
for (StreamDeviceInfoArray::const_iterator it =
video_enumeration_cache_.devices.begin();
it != video_enumeration_cache_.devices.end(); ++it) {
devices.push_back(it->device);
}
}
fake_ui_->SetAvailableDevices(devices);
request->ui_proxy = fake_ui_.Pass();
} else {
request->ui_proxy = MediaStreamUIProxy::Create();
}
request->ui_proxy->RequestAccess(
*request->UIRequest(),
base::Bind(&MediaStreamManager::HandleAccessRequestResponse,
base::Unretained(this), label));
}
void MediaStreamManager::SetupRequest(const std::string& label) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DeviceRequest* request = FindRequest(label);
if (!request) {
DVLOG(1) << "SetupRequest label " << label << " doesn't exist!!";
return; // This can happen if the request has been canceled.
}
if (!request->security_origin.is_valid()) {
LOG(ERROR) << "Invalid security origin. "
<< request->security_origin;
FinalizeRequestFailed(label,
request,
MEDIA_DEVICE_INVALID_SECURITY_ORIGIN);
return;
}
MediaStreamType audio_type = MEDIA_NO_SERVICE;
MediaStreamType video_type = MEDIA_NO_SERVICE;
ParseStreamType(request->options, &audio_type, &video_type);
request->SetAudioType(audio_type);
request->SetVideoType(video_type);
bool is_web_contents_capture =
audio_type == MEDIA_TAB_AUDIO_CAPTURE ||
video_type == MEDIA_TAB_VIDEO_CAPTURE;
if (is_web_contents_capture && !SetupTabCaptureRequest(request)) {
FinalizeRequestFailed(label,
request,
MEDIA_DEVICE_TAB_CAPTURE_FAILURE);
return;
}
bool is_screen_capture =
video_type == MEDIA_DESKTOP_VIDEO_CAPTURE;
if (is_screen_capture && !SetupScreenCaptureRequest(request)) {
FinalizeRequestFailed(label,
request,
MEDIA_DEVICE_SCREEN_CAPTURE_FAILURE);
return;
}
if (!is_web_contents_capture && !is_screen_capture) {
if (EnumerationRequired(&audio_enumeration_cache_, audio_type) ||
EnumerationRequired(&video_enumeration_cache_, video_type)) {
// Enumerate the devices if there is no valid device lists to be used.
StartEnumeration(request);
return;
} else {
// Cache is valid, so log the cached devices for MediaStream requests.
if (request->request_type == MEDIA_GENERATE_STREAM) {
std::string log_message("Using cached devices for request.\n");
if (audio_type != MEDIA_NO_SERVICE) {
log_message +=
GetLogMessageString(audio_type, audio_enumeration_cache_.devices);
}
if (video_type != MEDIA_NO_SERVICE) {
log_message +=
GetLogMessageString(video_type, video_enumeration_cache_.devices);
}
SendMessageToNativeLog(log_message);
}
}
if (!SetupDeviceCaptureRequest(request)) {
FinalizeRequestFailed(label, request, MEDIA_DEVICE_NO_HARDWARE);
return;
}
}
PostRequestToUI(label, request);
}
bool MediaStreamManager::SetupDeviceCaptureRequest(DeviceRequest* request) {
DCHECK((request->audio_type() == MEDIA_DEVICE_AUDIO_CAPTURE ||
request->audio_type() == MEDIA_NO_SERVICE) &&
(request->video_type() == MEDIA_DEVICE_VIDEO_CAPTURE ||
request->video_type() == MEDIA_NO_SERVICE));
std::string audio_device_id;
if (request->options.audio_requested &&
!GetRequestedDeviceCaptureId(request, request->audio_type(),
&audio_device_id)) {
return false;
}
std::string video_device_id;
if (request->options.video_requested &&
!GetRequestedDeviceCaptureId(request, request->video_type(),
&video_device_id)) {
return false;
}
request->CreateUIRequest(audio_device_id, video_device_id);
DVLOG(3) << "Audio requested " << request->options.audio_requested
<< " device id = " << audio_device_id
<< "Video requested " << request->options.video_requested
<< " device id = " << video_device_id;
return true;
}
bool MediaStreamManager::SetupTabCaptureRequest(DeviceRequest* request) {
DCHECK(request->audio_type() == MEDIA_TAB_AUDIO_CAPTURE ||
request->video_type() == MEDIA_TAB_VIDEO_CAPTURE);
std::string capture_device_id;
bool mandatory_audio = false;
bool mandatory_video = false;
if (!request->options.GetFirstAudioConstraintByName(kMediaStreamSourceId,
&capture_device_id,
&mandatory_audio) &&
!request->options.GetFirstVideoConstraintByName(kMediaStreamSourceId,
&capture_device_id,
&mandatory_video)) {
return false;
}
DCHECK(mandatory_audio || mandatory_video);
// Customize options for a WebContents based capture.
int target_render_process_id = 0;
int target_render_view_id = 0;
// TODO(justinlin): Can't plumb audio mirroring using stream type right
// now, so plumbing by device_id. Will revisit once it's refactored.
// http://crbug.com/163100
std::string tab_capture_device_id =
WebContentsCaptureUtil::AppendWebContentsDeviceScheme(capture_device_id);
bool has_valid_device_id = WebContentsCaptureUtil::ExtractTabCaptureTarget(
tab_capture_device_id, &target_render_process_id,
&target_render_view_id);
if (!has_valid_device_id ||
(request->audio_type() != MEDIA_TAB_AUDIO_CAPTURE &&
request->audio_type() != MEDIA_NO_SERVICE) ||
(request->video_type() != MEDIA_TAB_VIDEO_CAPTURE &&
request->video_type() != MEDIA_NO_SERVICE)) {
return false;
}
request->CreateTabCatureUIRequest(target_render_process_id,
target_render_view_id,
tab_capture_device_id);
DVLOG(3) << "SetupTabCaptureRequest "
<< ", {tab_capture_device_id = " << tab_capture_device_id << "}"
<< ", {target_render_process_id = " << target_render_process_id
<< "}"
<< ", {target_render_view_id = " << target_render_view_id << "}";
return true;
}
bool MediaStreamManager::SetupScreenCaptureRequest(DeviceRequest* request) {
DCHECK(request->audio_type() == MEDIA_LOOPBACK_AUDIO_CAPTURE ||
request->video_type() == MEDIA_DESKTOP_VIDEO_CAPTURE);
// For screen capture we only support two valid combinations:
// (1) screen video capture only, or
// (2) screen video capture with loopback audio capture.
if (request->video_type() != MEDIA_DESKTOP_VIDEO_CAPTURE ||
(request->audio_type() != MEDIA_NO_SERVICE &&
request->audio_type() != MEDIA_LOOPBACK_AUDIO_CAPTURE)) {
LOG(ERROR) << "Invalid screen capture request.";
return false;
}
std::string video_device_id;
if (request->video_type() == MEDIA_DESKTOP_VIDEO_CAPTURE) {
std::string video_stream_source;
bool mandatory = false;
if (!request->options.GetFirstVideoConstraintByName(
kMediaStreamSource,
&video_stream_source,
&mandatory)) {
LOG(ERROR) << kMediaStreamSource << " not found.";
return false;
}
DCHECK(mandatory);
if (video_stream_source == kMediaStreamSourceDesktop) {
if (!request->options.GetFirstVideoConstraintByName(
kMediaStreamSourceId,
&video_device_id,
&mandatory)) {
LOG(ERROR) << kMediaStreamSourceId << " not found.";
return false;
}
DCHECK(mandatory);
}
}
request->CreateUIRequest("", video_device_id);
return true;
}
StreamDeviceInfoArray MediaStreamManager::GetDevicesOpenedByRequest(
const std::string& label) const {
DeviceRequest* request = FindRequest(label);
if (!request)
return StreamDeviceInfoArray();
return request->devices;
}
bool MediaStreamManager::FindExistingRequestedDeviceInfo(
const DeviceRequest& new_request,
const MediaStreamDevice& new_device_info,
StreamDeviceInfo* existing_device_info,
MediaRequestState* existing_request_state) const {
DCHECK(existing_device_info);
DCHECK(existing_request_state);
std::string source_id = content::GetHMACForMediaDeviceID(
new_request.salt_callback,
new_request.security_origin,
new_device_info.id);
for (DeviceRequests::const_iterator it = requests_.begin();
it != requests_.end() ; ++it) {
const DeviceRequest* request = it->second;
if (request->requesting_process_id == new_request.requesting_process_id &&
request->requesting_view_id == new_request.requesting_view_id &&
request->request_type == new_request.request_type) {
for (StreamDeviceInfoArray::const_iterator device_it =
request->devices.begin();
device_it != request->devices.end(); ++device_it) {
if (device_it->device.id == source_id &&
device_it->device.type == new_device_info.type) {
*existing_device_info = *device_it;
*existing_request_state = request->state(device_it->device.type);
return true;
}
}
}
}
return false;
}
void MediaStreamManager::FinalizeGenerateStream(const std::string& label,
DeviceRequest* request) {
DVLOG(1) << "FinalizeGenerateStream label " << label;
const StreamDeviceInfoArray& requested_devices = request->devices;
// Partition the array of devices into audio vs video.
StreamDeviceInfoArray audio_devices, video_devices;
for (StreamDeviceInfoArray::const_iterator device_it =
requested_devices.begin();
device_it != requested_devices.end(); ++device_it) {
if (IsAudioMediaType(device_it->device.type)) {
audio_devices.push_back(*device_it);
} else if (IsVideoMediaType(device_it->device.type)) {
video_devices.push_back(*device_it);
} else {
NOTREACHED();
}
}
request->requester->StreamGenerated(
request->requesting_view_id,
request->page_request_id,
label, audio_devices, video_devices);
}
void MediaStreamManager::FinalizeRequestFailed(
const std::string& label,
DeviceRequest* request,
content::MediaStreamRequestResult result) {
if (request->requester)
request->requester->StreamGenerationFailed(
request->requesting_view_id,
request->page_request_id,
result);
if (request->request_type == MEDIA_DEVICE_ACCESS &&
!request->callback.is_null()) {
request->callback.Run(MediaStreamDevices(), request->ui_proxy.Pass());
}
DeleteRequest(label);
}
void MediaStreamManager::FinalizeOpenDevice(const std::string& label,
DeviceRequest* request) {
const StreamDeviceInfoArray& requested_devices = request->devices;
request->requester->DeviceOpened(request->requesting_view_id,
request->page_request_id,
label, requested_devices.front());
}
void MediaStreamManager::FinalizeEnumerateDevices(const std::string& label,
DeviceRequest* request) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK_EQ(request->request_type, MEDIA_ENUMERATE_DEVICES);
if (request->security_origin.is_valid()) {
for (StreamDeviceInfoArray::iterator it = request->devices.begin();
it != request->devices.end(); ++it) {
TranslateDeviceIdToSourceId(request, &it->device);
}
} else {
request->devices.clear();
}
request->requester->DevicesEnumerated(
request->requesting_view_id,
request->page_request_id,
label,
request->devices);
// TODO(tommi):
// Ideally enumeration requests should be deleted once they have been served
// (as any request). However, this implementation mixes requests and
// notifications together so enumeration requests are kept open by some
// implementations (only Pepper?) and enumerations are done again when
// device notifications are fired.
// Implementations that just want to request the device list and be done
// (e.g. DeviceRequestMessageFilter), they must (confusingly) call
// CancelRequest() after the request has been fulfilled. This is not
// obvious, not consistent in this class (see e.g. FinalizeMediaAccessRequest)
// and can lead to subtle bugs (requests not deleted at all deleted too
// early).
//
// Basically, it is not clear that using requests as an additional layer on
// top of device notifications is necessary or good.
//
// To add to this, MediaStreamManager currently relies on the external
// implementations of MediaStreamRequester to delete enumeration requests via
// CancelRequest and e.g. DeviceRequestMessageFilter does this. However the
// Pepper implementation does not seem to to this at all (and from what I can
// see, it is the only implementation that uses an enumeration request as a
// notification mechanism).
//
// We should decouple notifications from enumeration requests and once that
// has been done, remove the requirement to call CancelRequest() to delete
// enumeration requests and uncomment the following line:
//
// DeleteRequest(label);
}
void MediaStreamManager::FinalizeMediaAccessRequest(
const std::string& label,
DeviceRequest* request,
const MediaStreamDevices& devices) {
if (!request->callback.is_null())
request->callback.Run(devices, request->ui_proxy.Pass());
// Delete the request since it is done.
DeleteRequest(label);
}
void MediaStreamManager::InitializeDeviceManagersOnIOThread() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
if (device_task_runner_)
return;
device_task_runner_ = audio_manager_->GetWorkerTaskRunner();
audio_input_device_manager_ = new AudioInputDeviceManager(audio_manager_);
audio_input_device_manager_->Register(this, device_task_runner_);
video_capture_manager_ = new VideoCaptureManager();
video_capture_manager_->Register(this, device_task_runner_);
// We want to be notified of IO message loop destruction to delete the thread
// and the device managers.
io_loop_ = base::MessageLoop::current();
io_loop_->AddDestructionObserver(this);
if (CommandLine::ForCurrentProcess()->HasSwitch(
switches::kUseFakeDeviceForMediaStream)) {
DVLOG(1) << "Using fake device";
UseFakeDevice();
}
}
void MediaStreamManager::Opened(MediaStreamType stream_type,
int capture_session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DVLOG(1) << "Opened({stream_type = " << stream_type << "} "
<< "{capture_session_id = " << capture_session_id << "})";
// Find the request(s) containing this device and mark it as used.
// It can be used in several requests since the same device can be
// requested from the same web page.
for (DeviceRequests::iterator request_it = requests_.begin();
request_it != requests_.end(); ++request_it) {
const std::string& label = request_it->first;
DeviceRequest* request = request_it->second;
StreamDeviceInfoArray* devices = &(request->devices);
for (StreamDeviceInfoArray::iterator device_it = devices->begin();
device_it != devices->end(); ++device_it) {
if (device_it->device.type == stream_type &&
device_it->session_id == capture_session_id) {
CHECK(request->state(device_it->device.type) ==
MEDIA_REQUEST_STATE_OPENING);
// We've found a matching request.
request->SetState(device_it->device.type, MEDIA_REQUEST_STATE_DONE);
if (IsAudioMediaType(device_it->device.type)) {
// Store the native audio parameters in the device struct.
// TODO(xians): Handle the tab capture sample rate/channel layout
// in AudioInputDeviceManager::Open().
if (device_it->device.type != content::MEDIA_TAB_AUDIO_CAPTURE) {
const StreamDeviceInfo* info =
audio_input_device_manager_->GetOpenedDeviceInfoById(
device_it->session_id);
device_it->device.input = info->device.input;
device_it->device.matched_output = info->device.matched_output;
}
}
if (RequestDone(*request))
HandleRequestDone(label, request);
break;
}
}
}
}
void MediaStreamManager::HandleRequestDone(const std::string& label,
DeviceRequest* request) {
DCHECK(RequestDone(*request));
DVLOG(1) << "HandleRequestDone("
<< ", {label = " << label << "})";
switch (request->request_type) {
case MEDIA_OPEN_DEVICE:
FinalizeOpenDevice(label, request);
break;
case MEDIA_GENERATE_STREAM: {
FinalizeGenerateStream(label, request);
break;
}
default:
NOTREACHED();
break;
}
if (request->ui_proxy.get()) {
request->ui_proxy->OnStarted(
base::Bind(&MediaStreamManager::StopMediaStreamFromBrowser,
base::Unretained(this),
label),
base::Bind(&MediaStreamManager::OnMediaStreamUIWindowId,
base::Unretained(this),
request->video_type(),
request->devices));
}
}
void MediaStreamManager::Closed(MediaStreamType stream_type,
int capture_session_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
}
void MediaStreamManager::DevicesEnumerated(
MediaStreamType stream_type, const StreamDeviceInfoArray& devices) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DVLOG(1) << "DevicesEnumerated("
<< "{stream_type = " << stream_type << "})" << std::endl;
std::string log_message = "New device enumeration result:\n" +
GetLogMessageString(stream_type, devices);
SendMessageToNativeLog(log_message);
// Only cache the device list when the device list has been changed.
bool need_update_clients = false;
EnumerationCache* cache =
stream_type == MEDIA_DEVICE_AUDIO_CAPTURE ?
&audio_enumeration_cache_ : &video_enumeration_cache_;
if (!cache->valid ||
devices.size() != cache->devices.size() ||
!std::equal(devices.begin(), devices.end(), cache->devices.begin(),
StreamDeviceInfo::IsEqual)) {
StopRemovedDevices(cache->devices, devices);
cache->devices = devices;
need_update_clients = true;
// The device might not be able to be enumerated when it is not warmed up,
// for example, when the machine just wakes up from sleep. We set the cache
// to be invalid so that the next media request will trigger the
// enumeration again. See issue/317673.
cache->valid = !devices.empty();
}
if (need_update_clients && monitoring_started_)
NotifyDevicesChanged(stream_type, devices);
// Publish the result for all requests waiting for device list(s).
// Find the requests waiting for this device list, store their labels and
// release the iterator before calling device settings. We might get a call
// back from device_settings that will need to iterate through devices.
std::list<std::string> label_list;
for (DeviceRequests::iterator it = requests_.begin(); it != requests_.end();
++it) {
if (it->second->state(stream_type) == MEDIA_REQUEST_STATE_REQUESTED &&
(it->second->audio_type() == stream_type ||
it->second->video_type() == stream_type)) {
if (it->second->request_type != MEDIA_ENUMERATE_DEVICES)
it->second->SetState(stream_type, MEDIA_REQUEST_STATE_PENDING_APPROVAL);
label_list.push_back(it->first);
}
}
for (std::list<std::string>::iterator it = label_list.begin();
it != label_list.end(); ++it) {
DeviceRequest* request = FindRequest(*it);
switch (request->request_type) {
case MEDIA_ENUMERATE_DEVICES:
if (need_update_clients && request->requester) {
request->devices = devices;
FinalizeEnumerateDevices(*it, request);
}
break;
default:
if (request->state(request->audio_type()) ==
MEDIA_REQUEST_STATE_REQUESTED ||
request->state(request->video_type()) ==
MEDIA_REQUEST_STATE_REQUESTED) {
// We are doing enumeration for other type of media, wait until it is
// all done before posting the request to UI because UI needs
// the device lists to handle the request.
break;
}
if (!SetupDeviceCaptureRequest(request)) {
FinalizeRequestFailed(*it,
request,
MEDIA_DEVICE_NO_HARDWARE);
} else {
PostRequestToUI(*it, request);
}
break;
}
}
label_list.clear();
--active_enumeration_ref_count_[stream_type];
DCHECK_GE(active_enumeration_ref_count_[stream_type], 0);
}
// static
void MediaStreamManager::SendMessageToNativeLog(const std::string& message) {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(DoAddLogMessage, message));
}
void MediaStreamManager::OnSuspend() {
SendMessageToNativeLog("Power state suspended.");
}
void MediaStreamManager::OnResume() {
SendMessageToNativeLog("Power state resumed.");
}
void MediaStreamManager::AddLogMessageOnIOThread(const std::string& message) {
// Get render process ids on the IO thread.
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Grab all unique process ids that request a MediaStream or have a
// MediaStream running.
std::set<int> requesting_process_ids;
for (DeviceRequests::const_iterator it = requests_.begin();
it != requests_.end(); ++it) {
DeviceRequest* request = it->second;
if (request->request_type == MEDIA_GENERATE_STREAM)
requesting_process_ids.insert(request->requesting_process_id);
}
// MediaStreamManager is a singleton in BrowserMainLoop, which owns the UI
// thread. MediaStreamManager has the same lifetime as the UI thread, so it is
// safe to use base::Unretained.
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&MediaStreamManager::AddLogMessageOnUIThread,
base::Unretained(this),
requesting_process_ids,
message));
}
void MediaStreamManager::AddLogMessageOnUIThread(
const std::set<int>& requesting_process_ids,
const std::string& message) {
#if defined(ENABLE_WEBRTC)
// Must be on the UI thread to access RenderProcessHost from process ID.
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
for (std::set<int>::const_iterator it = requesting_process_ids.begin();
it != requesting_process_ids.end(); ++it) {
// Log the message to all renderers that are requesting a MediaStream or
// have a MediaStream running.
content::RenderProcessHostImpl* render_process_host_impl =
static_cast<content::RenderProcessHostImpl*>(
content::RenderProcessHost::FromID(*it));
if (render_process_host_impl)
render_process_host_impl->WebRtcLogMessage(message);
}
#endif
}
void MediaStreamManager::HandleAccessRequestResponse(
const std::string& label,
const MediaStreamDevices& devices,
content::MediaStreamRequestResult result) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DVLOG(1) << "HandleAccessRequestResponse("
<< ", {label = " << label << "})";
DeviceRequest* request = FindRequest(label);
if (!request) {
// The request has been canceled before the UI returned.
return;
}
if (request->request_type == MEDIA_DEVICE_ACCESS) {
FinalizeMediaAccessRequest(label, request, devices);
return;
}
// Handle the case when the request was denied.
if (result != MEDIA_DEVICE_OK) {
FinalizeRequestFailed(label, request, result);
return;
}
DCHECK(!devices.empty());
// Process all newly-accepted devices for this request.
bool found_audio = false;
bool found_video = false;
for (MediaStreamDevices::const_iterator device_it = devices.begin();
device_it != devices.end(); ++device_it) {
StreamDeviceInfo device_info;
device_info.device = *device_it;
// TODO(justinlin): Nicer way to do this?
// Re-append the device's id since we lost it when posting request to UI.
if (device_info.device.type == content::MEDIA_TAB_VIDEO_CAPTURE ||
device_info.device.type == content::MEDIA_TAB_AUDIO_CAPTURE) {
device_info.device.id = request->UIRequest()->tab_capture_device_id;
// Initialize the sample_rate and channel_layout here since for audio
// mirroring, we don't go through EnumerateDevices where these are usually
// initialized.
if (device_info.device.type == content::MEDIA_TAB_AUDIO_CAPTURE) {
const media::AudioParameters parameters =
audio_manager_->GetDefaultOutputStreamParameters();
int sample_rate = parameters.sample_rate();
// If we weren't able to get the native sampling rate or the sample_rate
// is outside the valid range for input devices set reasonable defaults.
if (sample_rate <= 0 || sample_rate > 96000)
sample_rate = 44100;
device_info.device.input.sample_rate = sample_rate;
device_info.device.input.channel_layout = media::CHANNEL_LAYOUT_STEREO;
}
}
if (device_info.device.type == request->audio_type()) {
found_audio = true;
} else if (device_info.device.type == request->video_type()) {
found_video = true;
}
// If this is request for a new MediaStream, a device is only opened once
// per render view. This is so that the permission to use a device can be
// revoked by a single call to StopStreamDevice regardless of how many
// MediaStreams it is being used in.
if (request->request_type == MEDIA_GENERATE_STREAM) {
MediaRequestState state;
if (FindExistingRequestedDeviceInfo(*request,
device_info.device,
&device_info,
&state)) {
request->devices.push_back(device_info);
request->SetState(device_info.device.type, state);
DVLOG(1) << "HandleAccessRequestResponse - device already opened "
<< ", {label = " << label << "}"
<< ", device_id = " << device_it->id << "}";
continue;
}
}
device_info.session_id =
GetDeviceManager(device_info.device.type)->Open(device_info);
TranslateDeviceIdToSourceId(request, &device_info.device);
request->devices.push_back(device_info);
request->SetState(device_info.device.type, MEDIA_REQUEST_STATE_OPENING);
DVLOG(1) << "HandleAccessRequestResponse - opening device "
<< ", {label = " << label << "}"
<< ", {device_id = " << device_info.device.id << "}"
<< ", {session_id = " << device_info.session_id << "}";
}
// Check whether we've received all stream types requested.
if (!found_audio && IsAudioMediaType(request->audio_type())) {
request->SetState(request->audio_type(), MEDIA_REQUEST_STATE_ERROR);
DVLOG(1) << "Set no audio found label " << label;
}
if (!found_video && IsVideoMediaType(request->video_type()))
request->SetState(request->video_type(), MEDIA_REQUEST_STATE_ERROR);
if (RequestDone(*request))
HandleRequestDone(label, request);
}
void MediaStreamManager::StopMediaStreamFromBrowser(const std::string& label) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DeviceRequest* request = FindRequest(label);
if (!request)
return;
// Notify renderers that the devices in the stream will be stopped.
if (request->requester) {
for (StreamDeviceInfoArray::iterator device_it = request->devices.begin();
device_it != request->devices.end(); ++device_it) {
request->requester->DeviceStopped(request->requesting_view_id,
label,
*device_it);
}
}
CancelRequest(label);
}
void MediaStreamManager::UseFakeDevice() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
video_capture_manager()->UseFakeDevice();
audio_input_device_manager()->UseFakeDevice();
}
void MediaStreamManager::UseFakeUI(scoped_ptr<FakeMediaStreamUIProxy> fake_ui) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
use_fake_ui_ = true;
fake_ui_ = fake_ui.Pass();
}
void MediaStreamManager::WillDestroyCurrentMessageLoop() {
DVLOG(3) << "MediaStreamManager::WillDestroyCurrentMessageLoop()";
DCHECK_EQ(base::MessageLoop::current(), io_loop_);
DCHECK(requests_.empty());
if (device_task_runner_) {
StopMonitoring();
video_capture_manager_->Unregister();
audio_input_device_manager_->Unregister();
device_task_runner_ = NULL;
}
audio_input_device_manager_ = NULL;
video_capture_manager_ = NULL;
}
void MediaStreamManager::NotifyDevicesChanged(
MediaStreamType stream_type,
const StreamDeviceInfoArray& devices) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
MediaObserver* media_observer =
GetContentClient()->browser()->GetMediaObserver();
if (media_observer == NULL)
return;
// Map the devices to MediaStreamDevices.
MediaStreamDevices new_devices;
for (StreamDeviceInfoArray::const_iterator it = devices.begin();
it != devices.end(); ++it) {
new_devices.push_back(it->device);
}
if (IsAudioMediaType(stream_type)) {
MediaCaptureDevicesImpl::GetInstance()->OnAudioCaptureDevicesChanged(
new_devices);
media_observer->OnAudioCaptureDevicesChanged();
} else if (IsVideoMediaType(stream_type)) {
MediaCaptureDevicesImpl::GetInstance()->OnVideoCaptureDevicesChanged(
new_devices);
media_observer->OnVideoCaptureDevicesChanged();
} else {
NOTREACHED();
}
}
bool MediaStreamManager::RequestDone(const DeviceRequest& request) const {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
const bool requested_audio = IsAudioMediaType(request.audio_type());
const bool requested_video = IsVideoMediaType(request.video_type());
const bool audio_done =
!requested_audio ||
request.state(request.audio_type()) == MEDIA_REQUEST_STATE_DONE ||
request.state(request.audio_type()) == MEDIA_REQUEST_STATE_ERROR;
if (!audio_done)
return false;
const bool video_done =
!requested_video ||
request.state(request.video_type()) == MEDIA_REQUEST_STATE_DONE ||
request.state(request.video_type()) == MEDIA_REQUEST_STATE_ERROR;
if (!video_done)
return false;
return true;
}
MediaStreamProvider* MediaStreamManager::GetDeviceManager(
MediaStreamType stream_type) {
if (IsVideoMediaType(stream_type)) {
return video_capture_manager();
} else if (IsAudioMediaType(stream_type)) {
return audio_input_device_manager();
}
NOTREACHED();
return NULL;
}
void MediaStreamManager::OnDevicesChanged(
base::SystemMonitor::DeviceType device_type) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// NOTE: This method is only called in response to physical audio/video device
// changes (from the operating system).
MediaStreamType stream_type;
if (device_type == base::SystemMonitor::DEVTYPE_AUDIO_CAPTURE) {
stream_type = MEDIA_DEVICE_AUDIO_CAPTURE;
} else if (device_type == base::SystemMonitor::DEVTYPE_VIDEO_CAPTURE) {
stream_type = MEDIA_DEVICE_VIDEO_CAPTURE;
} else {
return; // Uninteresting device change.
}
// Always do enumeration even though some enumeration is in progress,
// because those enumeration commands could be sent before these devices
// change.
++active_enumeration_ref_count_[stream_type];
GetDeviceManager(stream_type)->EnumerateDevices(stream_type);
}
void MediaStreamManager::OnMediaStreamUIWindowId(MediaStreamType video_type,
StreamDeviceInfoArray devices,
gfx::NativeViewId window_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
if (!window_id)
return;
// Pass along for desktop capturing. Ignored for other stream types.
if (video_type == MEDIA_DESKTOP_VIDEO_CAPTURE) {
for (StreamDeviceInfoArray::iterator it = devices.begin();
it != devices.end();
++it) {
if (it->device.type == MEDIA_DESKTOP_VIDEO_CAPTURE) {
video_capture_manager_->SetDesktopCaptureWindowId(it->session_id,
window_id);
break;
}
}
}
}
} // namespace content