blob: 80d5e67862afbe9c94ccf744681d9f4f5b2f4350 [file] [log] [blame]
* Copyright (c) 2012 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.
* video_capture_impl.h
#include "webrtc/common_video/interface/i420_video_frame.h"
#include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
#include "webrtc/modules/video_capture/include/video_capture.h"
#include "webrtc/modules/video_capture/video_capture_config.h"
#include "webrtc/system_wrappers/interface/tick_util.h"
namespace webrtc
class CriticalSectionWrapper;
namespace videocapturemodule {
// Class definitions
class VideoCaptureImpl: public VideoCaptureModule, public VideoCaptureExternal
* Create a video capture module object
* id - unique identifier of this video capture module object
* deviceUniqueIdUTF8 - name of the device. Available names can be found by using GetDeviceName
static VideoCaptureModule* Create(const int32_t id,
const char* deviceUniqueIdUTF8);
* Create a video capture module object used for external capture.
* id - unique identifier of this video capture module object
* externalCapture - [out] interface to call when a new frame is captured.
static VideoCaptureModule* Create(const int32_t id,
VideoCaptureExternal*& externalCapture);
static DeviceInfo* CreateDeviceInfo(const int32_t id);
// Helpers for converting between (integral) degrees and
// VideoCaptureRotation values. Return 0 on success.
static int32_t RotationFromDegrees(int degrees,
VideoCaptureRotation* rotation);
static int32_t RotationInDegrees(VideoCaptureRotation rotation,
int* degrees);
// Implements Module declared functions.
virtual int32_t ChangeUniqueId(const int32_t id);
//Call backs
virtual int32_t RegisterCaptureDataCallback(VideoCaptureDataCallback& dataCallback);
virtual int32_t DeRegisterCaptureDataCallback();
virtual int32_t RegisterCaptureCallback(VideoCaptureFeedBack& callBack);
virtual int32_t DeRegisterCaptureCallback();
virtual int32_t SetCaptureDelay(int32_t delayMS);
virtual int32_t CaptureDelay();
virtual int32_t SetCaptureRotation(VideoCaptureRotation rotation);
virtual int32_t EnableFrameRateCallback(const bool enable);
virtual int32_t EnableNoPictureAlarm(const bool enable);
virtual const char* CurrentDeviceName() const;
// Module handling
virtual int32_t TimeUntilNextProcess();
virtual int32_t Process();
// Implement VideoCaptureExternal
// |capture_time| must be specified in the NTP time format in milliseconds.
virtual int32_t IncomingFrame(uint8_t* videoFrame,
int32_t videoFrameLength,
const VideoCaptureCapability& frameInfo,
int64_t captureTime = 0);
virtual int32_t IncomingI420VideoFrame(I420VideoFrame* video_frame,
int64_t captureTime = 0);
// Platform dependent
virtual int32_t StartCapture(const VideoCaptureCapability& capability)
_requestedCapability = capability;
return -1;
virtual int32_t StopCapture() { return -1; }
virtual bool CaptureStarted() {return false; }
virtual int32_t CaptureSettings(VideoCaptureCapability& /*settings*/)
{ return -1; }
VideoCaptureEncodeInterface* GetEncodeInterface(const VideoCodec& /*codec*/)
{ return NULL; }
VideoCaptureImpl(const int32_t id);
virtual ~VideoCaptureImpl();
int32_t DeliverCapturedFrame(I420VideoFrame& captureFrame,
int64_t capture_time);
int32_t _id; // Module ID
char* _deviceUniqueId; // current Device unique name;
CriticalSectionWrapper& _apiCs;
int32_t _captureDelay; // Current capture delay. May be changed of platform dependent parts.
VideoCaptureCapability _requestedCapability; // Should be set by platform dependent code in StartCapture.
void UpdateFrameCount();
uint32_t CalculateFrameRate(const TickTime& now);
CriticalSectionWrapper& _callBackCs;
TickTime _lastProcessTime; // last time the module process function was called.
TickTime _lastFrameRateCallbackTime; // last time the frame rate callback function was called.
bool _frameRateCallBack; // true if EnableFrameRateCallback
bool _noPictureAlarmCallBack; //true if EnableNoPictureAlarm
VideoCaptureAlarm _captureAlarm; // current value of the noPictureAlarm
int32_t _setCaptureDelay; // The currently used capture delay
VideoCaptureDataCallback* _dataCallBack;
VideoCaptureFeedBack* _captureCallBack;
TickTime _lastProcessFrameCount;
TickTime _incomingFrameTimes[kFrameRateCountHistorySize];// timestamp for local captured frames
VideoRotationMode _rotateFrame; //Set if the frame should be rotated by the capture module.
I420VideoFrame _captureFrame;
VideoFrame _capture_encoded_frame;
// Used to make sure incoming timestamp is increasing for every frame.
int64_t last_capture_time_;
// Delta used for translating between NTP and internal timestamps.
const int64_t delta_ntp_internal_ms_;
} // namespace videocapturemodule
} // namespace webrtc