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/*
* libjingle
* Copyright 2004 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TALK_MEDIA_WEBRTCVIDEOCAPTURER_H_
#define TALK_MEDIA_WEBRTCVIDEOCAPTURER_H_
#ifdef HAVE_WEBRTC_VIDEO
#include <string>
#include <vector>
#include "talk/media/base/videocapturer.h"
#include "talk/media/webrtc/webrtcvideoframe.h"
#include "webrtc/base/asyncinvoker.h"
#include "webrtc/base/messagehandler.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
#include "webrtc/modules/video_capture/include/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 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(webrtc::VideoCaptureModule* module);
// Override virtual methods of the parent class VideoCapturer.
virtual bool GetBestCaptureFormat(const VideoFormat& desired,
VideoFormat* best_format);
virtual CaptureState Start(const VideoFormat& capture_format);
virtual void Stop();
virtual bool IsRunning();
virtual bool IsScreencast() const { return false; }
virtual bool SetApplyRotation(bool enable);
protected:
// Override virtual methods of the parent class VideoCapturer.
virtual bool GetPreferredFourccs(std::vector<uint32>* fourccs);
private:
// Callback when a frame is captured by camera.
virtual void OnIncomingCapturedFrame(const int32_t id,
const webrtc::I420VideoFrame& frame);
virtual void OnCaptureDelayChanged(const int32_t id,
const int32_t delay);
// 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::I420VideoFrame frame);
rtc::scoped_ptr<WebRtcVcmFactoryInterface> factory_;
webrtc::VideoCaptureModule* module_;
int captured_frames_;
std::vector<uint8_t> capture_buffer_;
rtc::Thread* start_thread_; // Set in Start(), unset in Stop();
rtc::scoped_ptr<rtc::AsyncInvoker> async_invoker_;
};
struct WebRtcCapturedFrame : public CapturedFrame {
public:
WebRtcCapturedFrame(const webrtc::I420VideoFrame& frame,
void* buffer, size_t length);
};
} // namespace cricket
#endif // HAVE_WEBRTC_VIDEO
#endif // TALK_MEDIA_WEBRTCVIDEOCAPTURER_H_