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28 #ifndef TALK_SESSION_MEDIA_CHANNELMANAGER_H_
29 #define TALK_SESSION_MEDIA_CHANNELMANAGER_H_
34 #include "talk/media/base/capturemanager.h"
35 #include "talk/media/base/mediaengine.h"
36 #include "webrtc/p2p/base/session.h"
37 #include "talk/session/media/voicechannel.h"
38 #include "webrtc/base/criticalsection.h"
39 #include "webrtc/base/fileutils.h"
40 #include "webrtc/base/sigslotrepeater.h"
41 #include "webrtc/base/thread.h"
45 const int kDefaultAudioDelayOffset = 0;
52 // ChannelManager allows the MediaEngine to run on a separate thread, and takes
53 // care of marshalling calls between threads. It also creates and keeps track of
54 // voice and video channels; by doing so, it can temporarily pause all the
55 // channels when a new audio or video device is chosen. The voice and video
56 // channels are stored in separate vectors, to easily allow operations on just
57 // voice or just video channels.
58 // ChannelManager also allows the application to discover what devices it has
59 // using device manager.
60 class ChannelManager : public rtc::MessageHandler,
61 public sigslot::has_slots<> {
63 #if !defined(DISABLE_MEDIA_ENGINE_FACTORY)
64 // Creates the channel manager, and specifies the worker thread to use.
65 explicit ChannelManager(rtc::Thread* worker);
68 // For testing purposes. Allows the media engine and data media
69 // engine and dev manager to be mocks. The ChannelManager takes
70 // ownership of these objects.
71 ChannelManager(MediaEngineInterface* me,
72 DataEngineInterface* dme,
73 DeviceManagerInterface* dm,
76 // Same as above, but gives an easier default DataEngine.
77 ChannelManager(MediaEngineInterface* me,
78 DeviceManagerInterface* dm,
82 // Accessors for the worker thread, allowing it to be set after construction,
83 // but before Init. set_worker_thread will return false if called after Init.
84 rtc::Thread* worker_thread() const { return worker_thread_; }
85 bool set_worker_thread(rtc::Thread* thread) {
86 if (initialized_) return false;
87 worker_thread_ = thread;
91 // Gets capabilities. Can be called prior to starting the media engine.
92 int GetCapabilities();
94 // Retrieves the list of supported audio & video codec types.
95 // Can be called before starting the media engine.
96 void GetSupportedAudioCodecs(std::vector<AudioCodec>* codecs) const;
97 void GetSupportedAudioRtpHeaderExtensions(RtpHeaderExtensions* ext) const;
98 void GetSupportedVideoCodecs(std::vector<VideoCodec>* codecs) const;
99 void GetSupportedVideoRtpHeaderExtensions(RtpHeaderExtensions* ext) const;
100 void GetSupportedDataCodecs(std::vector<DataCodec>* codecs) const;
102 // Indicates whether the media engine is started.
103 bool initialized() const { return initialized_; }
104 // Starts up the media engine.
106 // Shuts down the media engine.
109 // The operations below all occur on the worker thread.
111 // Creates a voice channel, to be associated with the specified session.
112 VoiceChannel* CreateVoiceChannel(
113 BaseSession* session, const std::string& content_name, bool rtcp);
114 // Destroys a voice channel created with the Create API.
115 void DestroyVoiceChannel(VoiceChannel* voice_channel);
116 // TODO(pbos): Remove as soon as all call sites specify VideoOptions.
117 VideoChannel* CreateVideoChannel(BaseSession* session,
118 const std::string& content_name,
120 VoiceChannel* voice_channel);
121 // Creates a video channel, synced with the specified voice channel, and
122 // associated with the specified session.
123 VideoChannel* CreateVideoChannel(BaseSession* session,
124 const std::string& content_name,
126 const VideoOptions& options,
127 VoiceChannel* voice_channel);
128 // Destroys a video channel created with the Create API.
129 void DestroyVideoChannel(VideoChannel* video_channel);
130 DataChannel* CreateDataChannel(
131 BaseSession* session, const std::string& content_name,
132 bool rtcp, DataChannelType data_channel_type);
133 // Destroys a data channel created with the Create API.
134 void DestroyDataChannel(DataChannel* data_channel);
136 // Creates a soundclip.
137 Soundclip* CreateSoundclip();
138 // Destroys a soundclip created with the Create API.
139 void DestroySoundclip(Soundclip* soundclip);
141 // Indicates whether any channels exist.
142 bool has_channels() const {
143 return (!voice_channels_.empty() || !video_channels_.empty() ||
144 !soundclips_.empty());
147 // Configures the audio and video devices. A null pointer can be passed to
148 // GetAudioOptions() for any parameter of no interest.
149 bool GetAudioOptions(std::string* wave_in_device,
150 std::string* wave_out_device,
151 AudioOptions* options);
152 bool SetAudioOptions(const std::string& wave_in_device,
153 const std::string& wave_out_device,
154 const AudioOptions& options);
155 // Sets Engine-specific audio options according to enabled experiments.
156 bool SetEngineAudioOptions(const AudioOptions& options);
157 bool GetOutputVolume(int* level);
158 bool SetOutputVolume(int level);
159 bool IsSameCapturer(const std::string& capturer_name,
160 VideoCapturer* capturer);
161 // TODO(noahric): Nearly everything called "device" in this API is actually a
162 // device name, so this should really be GetCaptureDeviceName, and the
163 // next method should be GetCaptureDevice.
164 bool GetCaptureDevice(std::string* cam_device);
165 // Gets the current capture Device.
166 bool GetVideoCaptureDevice(Device* device);
167 // Create capturer based on what has been set in SetCaptureDevice().
168 VideoCapturer* CreateVideoCapturer();
169 // Create capturer from a screen.
170 VideoCapturer* CreateScreenCapturer(const ScreencastId& screenid);
171 bool SetCaptureDevice(const std::string& cam_device);
172 bool SetDefaultVideoEncoderConfig(const VideoEncoderConfig& config);
173 // RTX will be enabled/disabled in engines that support it. The supporting
174 // engines will start offering an RTX codec. Must be called before Init().
175 bool SetVideoRtxEnabled(bool enable);
177 // Starts/stops the local microphone and enables polling of the input level.
178 bool SetLocalMonitor(bool enable);
179 bool monitoring() const { return monitoring_; }
180 bool capturing() const { return capturing_; }
182 // Configures the logging output of the mediaengine(s).
183 void SetVoiceLogging(int level, const char* filter);
184 void SetVideoLogging(int level, const char* filter);
186 // The channel manager handles the Tx side for Video processing,
187 // as well as Tx and Rx side for Voice processing.
188 // (The Rx Video processing will go throug the simplerenderingmanager,
189 // to be implemented).
190 bool RegisterVideoProcessor(VideoCapturer* capturer,
191 VideoProcessor* processor);
192 bool UnregisterVideoProcessor(VideoCapturer* capturer,
193 VideoProcessor* processor);
194 bool RegisterVoiceProcessor(uint32 ssrc,
195 VoiceProcessor* processor,
196 MediaProcessorDirection direction);
197 bool UnregisterVoiceProcessor(uint32 ssrc,
198 VoiceProcessor* processor,
199 MediaProcessorDirection direction);
200 // The following are done in the new "CaptureManager" style that
201 // all local video capturers, processors, and managers should move to.
202 // TODO(pthatcher): Make methods nicer by having start return a handle that
203 // can be used for stop and restart, rather than needing to pass around
204 // formats a a pseudo-handle.
205 bool StartVideoCapture(VideoCapturer* video_capturer,
206 const VideoFormat& video_format);
207 // When muting, produce black frames then pause the camera.
208 // When unmuting, start the camera. Camera starts unmuted.
209 bool MuteToBlackThenPause(VideoCapturer* video_capturer, bool muted);
210 bool StopVideoCapture(VideoCapturer* video_capturer,
211 const VideoFormat& video_format);
212 bool RestartVideoCapture(VideoCapturer* video_capturer,
213 const VideoFormat& previous_format,
214 const VideoFormat& desired_format,
215 CaptureManager::RestartOptions options);
217 bool AddVideoRenderer(VideoCapturer* capturer, VideoRenderer* renderer);
218 bool RemoveVideoRenderer(VideoCapturer* capturer, VideoRenderer* renderer);
219 bool IsScreencastRunning() const;
221 // The operations below occur on the main thread.
223 bool GetAudioInputDevices(std::vector<std::string>* names);
224 bool GetAudioOutputDevices(std::vector<std::string>* names);
225 bool GetVideoCaptureDevices(std::vector<std::string>* names);
226 void SetVideoCaptureDeviceMaxFormat(const std::string& usb_id,
227 const VideoFormat& max_format);
229 // Starts AEC dump using existing file.
230 bool StartAecDump(rtc::PlatformFile file);
232 sigslot::repeater0<> SignalDevicesChange;
233 sigslot::signal2<VideoCapturer*, CaptureState> SignalVideoCaptureStateChange;
235 // Returns the current selected device. Note: Subtly different from
236 // GetCaptureDevice(). See member video_device_ for more details.
237 // This API is mainly a hook used by unittests.
238 const std::string& video_device_name() const { return video_device_name_; }
240 // TODO(hellner): Remove this function once the engine capturer has been
242 VideoFormat GetStartCaptureFormat();
245 // Adds non-transient parameters which can only be changed through the
247 bool SetAudioOptions(const std::string& wave_in_device,
248 const std::string& wave_out_device,
249 const AudioOptions& options,
251 int audio_delay_offset() const { return audio_delay_offset_; }
252 // This is here so that ChannelManager subclasses can set the video
253 // capturer factories to use.
254 DeviceManagerInterface* device_manager() { return device_manager_.get(); }
257 typedef std::vector<VoiceChannel*> VoiceChannels;
258 typedef std::vector<VideoChannel*> VideoChannels;
259 typedef std::vector<DataChannel*> DataChannels;
260 typedef std::vector<Soundclip*> Soundclips;
262 void Construct(MediaEngineInterface* me,
263 DataEngineInterface* dme,
264 DeviceManagerInterface* dm,
266 rtc::Thread* worker_thread);
268 VoiceChannel* CreateVoiceChannel_w(
269 BaseSession* session, const std::string& content_name, bool rtcp);
270 void DestroyVoiceChannel_w(VoiceChannel* voice_channel);
271 VideoChannel* CreateVideoChannel_w(BaseSession* session,
272 const std::string& content_name,
274 const VideoOptions& options,
275 VoiceChannel* voice_channel);
276 void DestroyVideoChannel_w(VideoChannel* video_channel);
277 DataChannel* CreateDataChannel_w(
278 BaseSession* session, const std::string& content_name,
279 bool rtcp, DataChannelType data_channel_type);
280 void DestroyDataChannel_w(DataChannel* data_channel);
281 Soundclip* CreateSoundclip_w();
282 void DestroySoundclip_w(Soundclip* soundclip);
283 bool SetAudioOptions_w(const AudioOptions& options, int delay_offset,
284 const Device* in_dev, const Device* out_dev);
285 bool SetEngineAudioOptions_w(const AudioOptions& options);
286 bool SetCaptureDevice_w(const Device* cam_device);
287 void OnVideoCaptureStateChange(VideoCapturer* capturer,
288 CaptureState result);
289 bool RegisterVideoProcessor_w(VideoCapturer* capturer,
290 VideoProcessor* processor);
291 bool UnregisterVideoProcessor_w(VideoCapturer* capturer,
292 VideoProcessor* processor);
293 bool IsScreencastRunning_w() const;
294 virtual void OnMessage(rtc::Message *message);
296 rtc::scoped_ptr<MediaEngineInterface> media_engine_;
297 rtc::scoped_ptr<DataEngineInterface> data_media_engine_;
298 rtc::scoped_ptr<DeviceManagerInterface> device_manager_;
299 rtc::scoped_ptr<CaptureManager> capture_manager_;
301 rtc::Thread* main_thread_;
302 rtc::Thread* worker_thread_;
304 VoiceChannels voice_channels_;
305 VideoChannels video_channels_;
306 DataChannels data_channels_;
307 Soundclips soundclips_;
309 std::string audio_in_device_;
310 std::string audio_out_device_;
311 AudioOptions audio_options_;
312 int audio_delay_offset_;
313 int audio_output_volume_;
314 std::string camera_device_;
315 VideoEncoderConfig default_video_encoder_config_;
316 VideoRenderer* local_renderer_;
322 // String containing currently set device. Note that this string is subtly
323 // different from camera_device_. E.g. camera_device_ will list unplugged
324 // but selected devices while this sting will be empty or contain current
326 // TODO(hellner): refactor the code such that there is no need to keep two
327 // strings for video devices that have subtle differences in behavior.
328 std::string video_device_name_;
331 } // namespace cricket
333 #endif // TALK_SESSION_MEDIA_CHANNELMANAGER_H_