| /* |
| * 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. |
| */ |
| |
| #include "webrtc/modules/video_capture/video_capture_impl.h" |
| |
| #include <stdlib.h> |
| |
| #include "webrtc/base/refcount.h" |
| #include "webrtc/base/timeutils.h" |
| #include "webrtc/base/trace_event.h" |
| #include "webrtc/common_video/libyuv/include/webrtc_libyuv.h" |
| #include "webrtc/modules/include/module_common_types.h" |
| #include "webrtc/modules/video_capture/video_capture_config.h" |
| #include "webrtc/system_wrappers/include/clock.h" |
| #include "webrtc/system_wrappers/include/critical_section_wrapper.h" |
| #include "webrtc/system_wrappers/include/logging.h" |
| |
| namespace webrtc { |
| namespace videocapturemodule { |
| rtc::scoped_refptr<VideoCaptureModule> VideoCaptureImpl::Create( |
| const int32_t id, |
| VideoCaptureExternal*& externalCapture) { |
| rtc::scoped_refptr<VideoCaptureImpl> implementation( |
| new rtc::RefCountedObject<VideoCaptureImpl>(id)); |
| externalCapture = implementation.get(); |
| return implementation; |
| } |
| |
| const char* VideoCaptureImpl::CurrentDeviceName() const |
| { |
| return _deviceUniqueId; |
| } |
| |
| // static |
| int32_t VideoCaptureImpl::RotationFromDegrees(int degrees, |
| VideoRotation* rotation) { |
| switch (degrees) { |
| case 0: |
| *rotation = kVideoRotation_0; |
| return 0; |
| case 90: |
| *rotation = kVideoRotation_90; |
| return 0; |
| case 180: |
| *rotation = kVideoRotation_180; |
| return 0; |
| case 270: |
| *rotation = kVideoRotation_270; |
| return 0; |
| default: |
| return -1;; |
| } |
| } |
| |
| // static |
| int32_t VideoCaptureImpl::RotationInDegrees(VideoRotation rotation, |
| int* degrees) { |
| switch (rotation) { |
| case kVideoRotation_0: |
| *degrees = 0; |
| return 0; |
| case kVideoRotation_90: |
| *degrees = 90; |
| return 0; |
| case kVideoRotation_180: |
| *degrees = 180; |
| return 0; |
| case kVideoRotation_270: |
| *degrees = 270; |
| return 0; |
| } |
| return -1; |
| } |
| |
| // returns the number of milliseconds until the module want a worker thread to call Process |
| int64_t VideoCaptureImpl::TimeUntilNextProcess() |
| { |
| CriticalSectionScoped cs(&_callBackCs); |
| const int64_t kProcessIntervalMs = 300; |
| return kProcessIntervalMs - |
| (rtc::TimeNanos() - _lastProcessTimeNanos) / |
| rtc::kNumNanosecsPerMillisec; |
| } |
| |
| // Process any pending tasks such as timeouts |
| void VideoCaptureImpl::Process() |
| { |
| CriticalSectionScoped cs(&_callBackCs); |
| |
| const int64_t now_ns = rtc::TimeNanos(); |
| _lastProcessTimeNanos = rtc::TimeNanos(); |
| |
| // Handle No picture alarm |
| |
| if (_lastProcessFrameTimeNanos == _incomingFrameTimesNanos[0] && |
| _captureAlarm != Raised) |
| { |
| if (_noPictureAlarmCallBack && _captureCallBack) |
| { |
| _captureAlarm = Raised; |
| _captureCallBack->OnNoPictureAlarm(_id, _captureAlarm); |
| } |
| } |
| else if (_lastProcessFrameTimeNanos != _incomingFrameTimesNanos[0] && |
| _captureAlarm != Cleared) |
| { |
| if (_noPictureAlarmCallBack && _captureCallBack) |
| { |
| _captureAlarm = Cleared; |
| _captureCallBack->OnNoPictureAlarm(_id, _captureAlarm); |
| |
| } |
| } |
| |
| // Handle frame rate callback |
| if ((now_ns - _lastFrameRateCallbackTimeNanos) / |
| rtc::kNumNanosecsPerMillisec |
| > kFrameRateCallbackInterval) |
| { |
| if (_frameRateCallBack && _captureCallBack) |
| { |
| const uint32_t frameRate = CalculateFrameRate(now_ns); |
| _captureCallBack->OnCaptureFrameRate(_id, frameRate); |
| } |
| // Can be set by EnableFrameRateCallback |
| _lastFrameRateCallbackTimeNanos = now_ns; |
| |
| } |
| |
| _lastProcessFrameTimeNanos = _incomingFrameTimesNanos[0]; |
| } |
| |
| VideoCaptureImpl::VideoCaptureImpl(const int32_t id) |
| : _id(id), |
| _deviceUniqueId(NULL), |
| _apiCs(*CriticalSectionWrapper::CreateCriticalSection()), |
| _captureDelay(0), |
| _requestedCapability(), |
| _callBackCs(*CriticalSectionWrapper::CreateCriticalSection()), |
| _lastProcessTimeNanos(rtc::TimeNanos()), |
| _lastFrameRateCallbackTimeNanos(rtc::TimeNanos()), |
| _frameRateCallBack(false), |
| _noPictureAlarmCallBack(false), |
| _captureAlarm(Cleared), |
| _setCaptureDelay(0), |
| _dataCallBack(NULL), |
| _captureCallBack(NULL), |
| _lastProcessFrameTimeNanos(rtc::TimeNanos()), |
| _rotateFrame(kVideoRotation_0), |
| apply_rotation_(false) { |
| _requestedCapability.width = kDefaultWidth; |
| _requestedCapability.height = kDefaultHeight; |
| _requestedCapability.maxFPS = 30; |
| _requestedCapability.rawType = kVideoI420; |
| _requestedCapability.codecType = kVideoCodecUnknown; |
| memset(_incomingFrameTimesNanos, 0, sizeof(_incomingFrameTimesNanos)); |
| } |
| |
| VideoCaptureImpl::~VideoCaptureImpl() |
| { |
| DeRegisterCaptureDataCallback(); |
| DeRegisterCaptureCallback(); |
| delete &_callBackCs; |
| delete &_apiCs; |
| |
| if (_deviceUniqueId) |
| delete[] _deviceUniqueId; |
| } |
| |
| void VideoCaptureImpl::RegisterCaptureDataCallback( |
| VideoCaptureDataCallback& dataCallBack) { |
| CriticalSectionScoped cs(&_apiCs); |
| CriticalSectionScoped cs2(&_callBackCs); |
| _dataCallBack = &dataCallBack; |
| } |
| |
| void VideoCaptureImpl::DeRegisterCaptureDataCallback() { |
| CriticalSectionScoped cs(&_apiCs); |
| CriticalSectionScoped cs2(&_callBackCs); |
| _dataCallBack = NULL; |
| } |
| void VideoCaptureImpl::RegisterCaptureCallback(VideoCaptureFeedBack& callBack) { |
| |
| CriticalSectionScoped cs(&_apiCs); |
| CriticalSectionScoped cs2(&_callBackCs); |
| _captureCallBack = &callBack; |
| } |
| void VideoCaptureImpl::DeRegisterCaptureCallback() { |
| |
| CriticalSectionScoped cs(&_apiCs); |
| CriticalSectionScoped cs2(&_callBackCs); |
| _captureCallBack = NULL; |
| } |
| void VideoCaptureImpl::SetCaptureDelay(int32_t delayMS) { |
| CriticalSectionScoped cs(&_apiCs); |
| _captureDelay = delayMS; |
| } |
| int32_t VideoCaptureImpl::CaptureDelay() |
| { |
| CriticalSectionScoped cs(&_apiCs); |
| return _setCaptureDelay; |
| } |
| |
| int32_t VideoCaptureImpl::DeliverCapturedFrame(VideoFrame& captureFrame) { |
| UpdateFrameCount(); // frame count used for local frame rate callback. |
| |
| const bool callOnCaptureDelayChanged = _setCaptureDelay != _captureDelay; |
| // Capture delay changed |
| if (_setCaptureDelay != _captureDelay) { |
| _setCaptureDelay = _captureDelay; |
| } |
| |
| if (_dataCallBack) { |
| if (callOnCaptureDelayChanged) { |
| _dataCallBack->OnCaptureDelayChanged(_id, _captureDelay); |
| } |
| _dataCallBack->OnIncomingCapturedFrame(_id, captureFrame); |
| } |
| |
| return 0; |
| } |
| |
| int32_t VideoCaptureImpl::IncomingFrame( |
| uint8_t* videoFrame, |
| size_t videoFrameLength, |
| const VideoCaptureCapability& frameInfo, |
| int64_t captureTime/*=0*/) |
| { |
| CriticalSectionScoped cs(&_apiCs); |
| CriticalSectionScoped cs2(&_callBackCs); |
| |
| const int32_t width = frameInfo.width; |
| const int32_t height = frameInfo.height; |
| |
| TRACE_EVENT1("webrtc", "VC::IncomingFrame", "capture_time", captureTime); |
| |
| if (frameInfo.codecType == kVideoCodecUnknown) |
| { |
| // Not encoded, convert to I420. |
| const VideoType commonVideoType = |
| RawVideoTypeToCommonVideoVideoType(frameInfo.rawType); |
| |
| if (frameInfo.rawType != kVideoMJPEG && |
| CalcBufferSize(commonVideoType, width, |
| abs(height)) != videoFrameLength) |
| { |
| LOG(LS_ERROR) << "Wrong incoming frame length."; |
| return -1; |
| } |
| |
| int stride_y = width; |
| int stride_uv = (width + 1) / 2; |
| int target_width = width; |
| int target_height = height; |
| |
| // SetApplyRotation doesn't take any lock. Make a local copy here. |
| bool apply_rotation = apply_rotation_; |
| |
| if (apply_rotation) { |
| // Rotating resolution when for 90/270 degree rotations. |
| if (_rotateFrame == kVideoRotation_90 || |
| _rotateFrame == kVideoRotation_270) { |
| target_width = abs(height); |
| target_height = width; |
| } |
| } |
| |
| // Setting absolute height (in case it was negative). |
| // In Windows, the image starts bottom left, instead of top left. |
| // Setting a negative source height, inverts the image (within LibYuv). |
| _captureFrame.CreateEmptyFrame(target_width, |
| abs(target_height), |
| stride_y, |
| stride_uv, stride_uv); |
| const int conversionResult = ConvertToI420( |
| commonVideoType, videoFrame, 0, 0, // No cropping |
| width, height, videoFrameLength, |
| apply_rotation ? _rotateFrame : kVideoRotation_0, &_captureFrame); |
| if (conversionResult < 0) |
| { |
| LOG(LS_ERROR) << "Failed to convert capture frame from type " |
| << frameInfo.rawType << "to I420."; |
| return -1; |
| } |
| |
| if (!apply_rotation) { |
| _captureFrame.set_rotation(_rotateFrame); |
| } else { |
| _captureFrame.set_rotation(kVideoRotation_0); |
| } |
| _captureFrame.set_ntp_time_ms(captureTime); |
| _captureFrame.set_render_time_ms(rtc::TimeMillis()); |
| |
| DeliverCapturedFrame(_captureFrame); |
| } |
| else // Encoded format |
| { |
| assert(false); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int32_t VideoCaptureImpl::SetCaptureRotation(VideoRotation rotation) { |
| CriticalSectionScoped cs(&_apiCs); |
| CriticalSectionScoped cs2(&_callBackCs); |
| _rotateFrame = rotation; |
| return 0; |
| } |
| |
| void VideoCaptureImpl::EnableFrameRateCallback(const bool enable) { |
| CriticalSectionScoped cs(&_apiCs); |
| CriticalSectionScoped cs2(&_callBackCs); |
| _frameRateCallBack = enable; |
| if (enable) |
| { |
| _lastFrameRateCallbackTimeNanos = rtc::TimeNanos(); |
| } |
| } |
| |
| bool VideoCaptureImpl::SetApplyRotation(bool enable) { |
| // We can't take any lock here as it'll cause deadlock with IncomingFrame. |
| |
| // The effect of this is the last caller wins. |
| apply_rotation_ = enable; |
| return true; |
| } |
| |
| void VideoCaptureImpl::EnableNoPictureAlarm(const bool enable) { |
| CriticalSectionScoped cs(&_apiCs); |
| CriticalSectionScoped cs2(&_callBackCs); |
| _noPictureAlarmCallBack = enable; |
| } |
| |
| void VideoCaptureImpl::UpdateFrameCount() |
| { |
| if (_incomingFrameTimesNanos[0] / rtc::kNumNanosecsPerMicrosec == 0) |
| { |
| // first no shift |
| } |
| else |
| { |
| // shift |
| for (int i = (kFrameRateCountHistorySize - 2); i >= 0; i--) |
| { |
| _incomingFrameTimesNanos[i + 1] = _incomingFrameTimesNanos[i]; |
| } |
| } |
| _incomingFrameTimesNanos[0] = rtc::TimeNanos(); |
| } |
| |
| uint32_t VideoCaptureImpl::CalculateFrameRate(int64_t now_ns) |
| { |
| int32_t num = 0; |
| int32_t nrOfFrames = 0; |
| for (num = 1; num < (kFrameRateCountHistorySize - 1); num++) |
| { |
| if (_incomingFrameTimesNanos[num] <= 0 || |
| (now_ns - _incomingFrameTimesNanos[num]) / |
| rtc::kNumNanosecsPerMillisec > |
| kFrameRateHistoryWindowMs) // don't use data older than 2sec |
| { |
| break; |
| } |
| else |
| { |
| nrOfFrames++; |
| } |
| } |
| if (num > 1) |
| { |
| int64_t diff = (now_ns - _incomingFrameTimesNanos[num - 1]) / |
| rtc::kNumNanosecsPerMillisec; |
| if (diff > 0) |
| { |
| return uint32_t((nrOfFrames * 1000.0f / diff) + 0.5f); |
| } |
| } |
| |
| return nrOfFrames; |
| } |
| } // namespace videocapturemodule |
| } // namespace webrtc |
