| /* |
| * Copyright (c) 2004 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #ifndef WEBRTC_MEDIA_ENGINE_WEBRTCVIDEOCAPTURER_H_ |
| #define WEBRTC_MEDIA_ENGINE_WEBRTCVIDEOCAPTURER_H_ |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "webrtc/base/asyncinvoker.h" |
| #include "webrtc/base/messagehandler.h" |
| #include "webrtc/base/scoped_ref_ptr.h" |
| #include "webrtc/common_video/libyuv/include/webrtc_libyuv.h" |
| #include "webrtc/media/base/device.h" |
| #include "webrtc/media/base/videocapturer.h" |
| #include "webrtc/media/engine/webrtcvideoframe.h" |
| #include "webrtc/modules/video_capture/video_capture.h" |
| |
| namespace cricket { |
| |
| // Factory to allow injection of a VCM impl into WebRtcVideoCapturer. |
| // DeviceInfos do not have a Release() and therefore need an explicit Destroy(). |
| class WebRtcVcmFactoryInterface { |
| public: |
| virtual ~WebRtcVcmFactoryInterface() {} |
| virtual rtc::scoped_refptr<webrtc::VideoCaptureModule> Create( |
| int id, |
| const char* device) = 0; |
| virtual webrtc::VideoCaptureModule::DeviceInfo* CreateDeviceInfo(int id) = 0; |
| virtual void DestroyDeviceInfo( |
| webrtc::VideoCaptureModule::DeviceInfo* info) = 0; |
| }; |
| |
| // WebRTC-based implementation of VideoCapturer. |
| class WebRtcVideoCapturer : public VideoCapturer, |
| public webrtc::VideoCaptureDataCallback { |
| public: |
| WebRtcVideoCapturer(); |
| explicit WebRtcVideoCapturer(WebRtcVcmFactoryInterface* factory); |
| virtual ~WebRtcVideoCapturer(); |
| |
| bool Init(const Device& device); |
| bool Init(const rtc::scoped_refptr<webrtc::VideoCaptureModule>& module); |
| |
| // Override virtual methods of the parent class VideoCapturer. |
| bool GetBestCaptureFormat(const VideoFormat& desired, |
| VideoFormat* best_format) override; |
| CaptureState Start(const VideoFormat& capture_format) override; |
| void Stop() override; |
| bool IsRunning() override; |
| bool IsScreencast() const override { return false; } |
| |
| protected: |
| void OnSinkWantsChanged(const rtc::VideoSinkWants& wants) override; |
| // Override virtual methods of the parent class VideoCapturer. |
| bool GetPreferredFourccs(std::vector<uint32_t>* fourccs) override; |
| |
| private: |
| // Callback when a frame is captured by camera. |
| void OnIncomingCapturedFrame(const int32_t id, |
| const webrtc::VideoFrame& frame) override; |
| void OnCaptureDelayChanged(const int32_t id, |
| const int32_t delay) override; |
| |
| // Used to signal captured frames on the same thread as invoked Start(). |
| // With WebRTC's current VideoCapturer implementations, this will mean a |
| // thread hop, but in other implementations (e.g. Chrome) it will be called |
| // directly from OnIncomingCapturedFrame. |
| // TODO(tommi): Remove this workaround when we've updated the WebRTC capturers |
| // to follow the same contract. |
| void SignalFrameCapturedOnStartThread(const webrtc::VideoFrame& frame); |
| |
| std::unique_ptr<WebRtcVcmFactoryInterface> factory_; |
| rtc::scoped_refptr<webrtc::VideoCaptureModule> module_; |
| int captured_frames_; |
| std::vector<uint8_t> capture_buffer_; |
| rtc::Thread* start_thread_; // Set in Start(), unset in Stop(); |
| |
| std::unique_ptr<rtc::AsyncInvoker> async_invoker_; |
| }; |
| |
| } // namespace cricket |
| |
| #endif // WEBRTC_MEDIA_WEBRTC_WEBRTCVIDEOCAPTURER_H_ |