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