735 lines
29 KiB
Plaintext
735 lines
29 KiB
Plaintext
#include "VideoCameraCapturer.h"
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#import <AVFoundation/AVFoundation.h>
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#include "rtc_base/logging.h"
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#import "base/RTCLogging.h"
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#import "base/RTCVideoFrameBuffer.h"
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#import "TGRTCCVPixelBuffer.h"
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#import "sdk/objc/native/src/objc_video_track_source.h"
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#import "sdk/objc/native/src/objc_frame_buffer.h"
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#import "api/video_track_source_proxy.h"
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#import "helpers/UIDevice+RTCDevice.h"
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#import "helpers/AVCaptureSession+DevicePosition.h"
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#import "helpers/RTCDispatcher+Private.h"
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#import "base/RTCVideoFrame.h"
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#include "common_video/libyuv/include/webrtc_libyuv.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/logging.h"
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#include "third_party/libyuv/include/libyuv.h"
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static const int64_t kNanosecondsPerSecond = 1000000000;
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static webrtc::ObjCVideoTrackSource *getObjCVideoSource(const rtc::scoped_refptr<webrtc::VideoTrackSourceInterface> nativeSource) {
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webrtc::VideoTrackSourceProxy *proxy_source =
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static_cast<webrtc::VideoTrackSourceProxy *>(nativeSource.get());
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return static_cast<webrtc::ObjCVideoTrackSource *>(proxy_source->internal());
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}
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//TODO: investigate the green edge after scaling, likely related to padding
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/*@interface RTCCVPixelBuffer (CustomCropping)
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@end
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@implementation RTCCVPixelBuffer (CustomCropping)
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- (BOOL)custom_cropAndScaleTo:(CVPixelBufferRef)outputPixelBuffer
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withTempBuffer:(nullable uint8_t*)tmpBuffer {
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const OSType srcPixelFormat = CVPixelBufferGetPixelFormatType(self.pixelBuffer);
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const OSType dstPixelFormat = CVPixelBufferGetPixelFormatType(outputPixelBuffer);
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switch (srcPixelFormat) {
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case kCVPixelFormatType_420YpCbCr8BiPlanarFullRange:
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case kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange: {
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size_t dstWidth = CVPixelBufferGetWidth(outputPixelBuffer);
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size_t dstHeight = CVPixelBufferGetHeight(outputPixelBuffer);
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if (dstWidth > 0 && dstHeight > 0) {
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RTC_DCHECK(dstPixelFormat == kCVPixelFormatType_420YpCbCr8BiPlanarFullRange ||
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dstPixelFormat == kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange);
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if ([self requiresScalingToWidth:(int)dstWidth height:(int)dstHeight]) {
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RTC_DCHECK(tmpBuffer);
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}
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[self custom_cropAndScaleNV12To:outputPixelBuffer withTempBuffer:tmpBuffer];
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}
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break;
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}
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case kCVPixelFormatType_32BGRA:
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case kCVPixelFormatType_32ARGB: {
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RTC_DCHECK(srcPixelFormat == dstPixelFormat);
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[self custom_cropAndScaleARGBTo:outputPixelBuffer];
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break;
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}
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default: { RTC_NOTREACHED() << "Unsupported pixel format."; }
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}
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return YES;
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}
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- (void)custom_cropAndScaleNV12To:(CVPixelBufferRef)outputPixelBuffer withTempBuffer:(uint8_t*)tmpBuffer {
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// Prepare output pointers.
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CVReturn cvRet = CVPixelBufferLockBaseAddress(outputPixelBuffer, 0);
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if (cvRet != kCVReturnSuccess) {
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RTC_LOG(LS_ERROR) << "Failed to lock base address: " << cvRet;
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}
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const int dstWidth = (int)CVPixelBufferGetWidth(outputPixelBuffer);
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const int dstHeight = (int)CVPixelBufferGetHeight(outputPixelBuffer);
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uint8_t* dstY =
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reinterpret_cast<uint8_t*>(CVPixelBufferGetBaseAddressOfPlane(outputPixelBuffer, 0));
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const int dstYStride = (int)CVPixelBufferGetBytesPerRowOfPlane(outputPixelBuffer, 0);
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uint8_t* dstUV =
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reinterpret_cast<uint8_t*>(CVPixelBufferGetBaseAddressOfPlane(outputPixelBuffer, 1));
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const int dstUVStride = (int)CVPixelBufferGetBytesPerRowOfPlane(outputPixelBuffer, 1);
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// Prepare source pointers.
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CVPixelBufferLockBaseAddress(self.pixelBuffer, kCVPixelBufferLock_ReadOnly);
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const uint8_t* srcY = static_cast<uint8_t*>(CVPixelBufferGetBaseAddressOfPlane(self.pixelBuffer, 0));
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const int srcYStride = (int)CVPixelBufferGetBytesPerRowOfPlane(self.pixelBuffer, 0);
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const uint8_t* srcUV = static_cast<uint8_t*>(CVPixelBufferGetBaseAddressOfPlane(self.pixelBuffer, 1));
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const int srcUVStride = (int)CVPixelBufferGetBytesPerRowOfPlane(self.pixelBuffer, 1);
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// Crop just by modifying pointers.
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srcY += srcYStride * self.cropY + self.cropX;
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srcUV += srcUVStride * (self.cropY / 2) + self.cropX;
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webrtc::NV12Scale(tmpBuffer,
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srcY,
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srcYStride,
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srcUV,
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srcUVStride,
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self.cropWidth,
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self.cropHeight,
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dstY,
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dstYStride,
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dstUV,
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dstUVStride,
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dstWidth,
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dstHeight);
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CVPixelBufferUnlockBaseAddress(self.pixelBuffer, kCVPixelBufferLock_ReadOnly);
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CVPixelBufferUnlockBaseAddress(outputPixelBuffer, 0);
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}
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- (void)custom_cropAndScaleARGBTo:(CVPixelBufferRef)outputPixelBuffer {
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// Prepare output pointers.
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CVReturn cvRet = CVPixelBufferLockBaseAddress(outputPixelBuffer, 0);
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if (cvRet != kCVReturnSuccess) {
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RTC_LOG(LS_ERROR) << "Failed to lock base address: " << cvRet;
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}
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const int dstWidth = (int)CVPixelBufferGetWidth(outputPixelBuffer);
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const int dstHeight = (int)CVPixelBufferGetHeight(outputPixelBuffer);
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uint8_t* dst = reinterpret_cast<uint8_t*>(CVPixelBufferGetBaseAddress(outputPixelBuffer));
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const int dstStride = (int)CVPixelBufferGetBytesPerRow(outputPixelBuffer);
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// Prepare source pointers.
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CVPixelBufferLockBaseAddress(self.pixelBuffer, kCVPixelBufferLock_ReadOnly);
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const uint8_t* src = static_cast<uint8_t*>(CVPixelBufferGetBaseAddress(self.pixelBuffer));
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const int srcStride = (int)CVPixelBufferGetBytesPerRow(self.pixelBuffer);
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// Crop just by modifying pointers. Need to ensure that src pointer points to a byte corresponding
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// to the start of a new pixel (byte with B for BGRA) so that libyuv scales correctly.
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const int bytesPerPixel = 4;
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src += srcStride * self.cropY + (self.cropX * bytesPerPixel);
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// kCVPixelFormatType_32BGRA corresponds to libyuv::FOURCC_ARGB
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libyuv::ARGBScale(src,
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srcStride,
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self.cropWidth,
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self.cropHeight,
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dst,
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dstStride,
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dstWidth,
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dstHeight,
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libyuv::kFilterBox);
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CVPixelBufferUnlockBaseAddress(self.pixelBuffer, kCVPixelBufferLock_ReadOnly);
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CVPixelBufferUnlockBaseAddress(outputPixelBuffer, 0);
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}
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@end*/
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@interface VideoCameraCapturer () <AVCaptureVideoDataOutputSampleBufferDelegate> {
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rtc::scoped_refptr<webrtc::VideoTrackSourceInterface> _source;
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bool _isFrontCamera;
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dispatch_queue_t _frameQueue;
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AVCaptureDevice *_currentDevice;
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BOOL _hasRetriedOnFatalError;
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BOOL _isRunning;
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BOOL _willBeRunning;
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AVCaptureVideoDataOutput *_videoDataOutput;
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AVCaptureSession *_captureSession;
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FourCharCode _preferredOutputPixelFormat;
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FourCharCode _outputPixelFormat;
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RTCVideoRotation _rotation;
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UIDeviceOrientation _orientation;
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bool _rotationLock;
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void (^_isActiveUpdated)(bool);
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bool _isActiveValue;
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bool _inForegroundValue;
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bool _isPaused;
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float _aspectRatio;
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std::vector<uint8_t> _croppingBuffer;
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std::shared_ptr<rtc::VideoSinkInterface<webrtc::VideoFrame>> _uncroppedSink;
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int _warmupFrameCount;
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}
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@end
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@implementation VideoCameraCapturer
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- (instancetype)initWithSource:(rtc::scoped_refptr<webrtc::VideoTrackSourceInterface>)source useFrontCamera:(bool)useFrontCamera isActiveUpdated:(void (^)(bool))isActiveUpdated {
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self = [super init];
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if (self != nil) {
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_source = source;
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_isFrontCamera = useFrontCamera;
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_isActiveValue = true;
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_inForegroundValue = true;
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_isPaused = false;
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_isActiveUpdated = [isActiveUpdated copy];
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_warmupFrameCount = 100;
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#if TARGET_OS_IPHONE
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_rotationLock = true;
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#endif
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if (![self setupCaptureSession:[[AVCaptureSession alloc] init]]) {
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return nil;
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}
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NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
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_orientation = UIDeviceOrientationPortrait;
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_rotation = RTCVideoRotation_90;
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[center addObserver:self
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selector:@selector(deviceOrientationDidChange:)
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name:UIDeviceOrientationDidChangeNotification
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object:nil];
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[center addObserver:self
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selector:@selector(handleCaptureSessionInterruption:)
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name:AVCaptureSessionWasInterruptedNotification
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object:_captureSession];
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[center addObserver:self
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selector:@selector(handleCaptureSessionInterruptionEnded:)
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name:AVCaptureSessionInterruptionEndedNotification
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object:_captureSession];
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[center addObserver:self
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selector:@selector(handleApplicationDidBecomeActive:)
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name:UIApplicationDidBecomeActiveNotification
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object:[UIApplication sharedApplication]];
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[center addObserver:self
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selector:@selector(handleApplicationWillEnterForeground:)
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name:UIApplicationWillEnterForegroundNotification
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object:[UIApplication sharedApplication]];
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[center addObserver:self
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selector:@selector(handleCaptureSessionRuntimeError:)
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name:AVCaptureSessionRuntimeErrorNotification
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object:_captureSession];
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[center addObserver:self
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selector:@selector(handleCaptureSessionDidStartRunning:)
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name:AVCaptureSessionDidStartRunningNotification
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object:_captureSession];
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[center addObserver:self
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selector:@selector(handleCaptureSessionDidStopRunning:)
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name:AVCaptureSessionDidStopRunningNotification
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object:_captureSession];
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}
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return self;
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}
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- (void)dealloc {
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NSAssert(!_willBeRunning, @"Session was still running in RTCCameraVideoCapturer dealloc. Forgot to call stopCapture?");
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[[NSNotificationCenter defaultCenter] removeObserver:self];
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}
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+ (NSArray<AVCaptureDevice *> *)captureDevices {
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if (@available(iOS 10.0, *)) {
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AVCaptureDeviceDiscoverySession *session = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:@[AVCaptureDeviceTypeBuiltInWideAngleCamera] mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionUnspecified];
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return session.devices;
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} else {
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NSMutableArray<AVCaptureDevice *> *result = [[NSMutableArray alloc] init];
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for (AVCaptureDevice *device in [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]) {
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if (device.position == AVCaptureDevicePositionFront || device.position == AVCaptureDevicePositionBack) {
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[result addObject:device];
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}
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}
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return result;
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}
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}
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+ (NSArray<AVCaptureDeviceFormat *> *)supportedFormatsForDevice:(AVCaptureDevice *)device {
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// Support opening the device in any format. We make sure it's converted to a format we
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// can handle, if needed, in the method `-setupVideoDataOutput`.
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return device.formats;
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}
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- (FourCharCode)preferredOutputPixelFormat {
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return _preferredOutputPixelFormat;
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}
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- (void)startCaptureWithDevice:(AVCaptureDevice *)device
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format:(AVCaptureDeviceFormat *)format
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fps:(NSInteger)fps {
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[self startCaptureWithDevice:device format:format fps:fps completionHandler:nil];
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}
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- (void)stopCapture {
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_isActiveUpdated = nil;
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[self stopCaptureWithCompletionHandler:nil];
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}
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- (void)setIsEnabled:(bool)isEnabled {
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_isPaused = !isEnabled;
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[self updateIsActiveValue];
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}
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- (void)setUncroppedSink:(std::shared_ptr<rtc::VideoSinkInterface<webrtc::VideoFrame>>)sink {
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_uncroppedSink = sink;
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}
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- (void)setPreferredCaptureAspectRatio:(float)aspectRatio {
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_aspectRatio = aspectRatio;
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}
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- (void)startCaptureWithDevice:(AVCaptureDevice *)device
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format:(AVCaptureDeviceFormat *)format
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fps:(NSInteger)fps
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completionHandler:(nullable void (^)(NSError *))completionHandler {
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_willBeRunning = YES;
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[RTCDispatcher
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dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
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block:^{
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RTCLogInfo("startCaptureWithDevice %@ @ %ld fps", format, (long)fps);
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dispatch_async(dispatch_get_main_queue(), ^{
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[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
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});
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_currentDevice = device;
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NSError *error = nil;
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if (![_currentDevice lockForConfiguration:&error]) {
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RTCLogError(@"Failed to lock device %@. Error: %@",
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_currentDevice,
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error.userInfo);
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if (completionHandler) {
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completionHandler(error);
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}
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_willBeRunning = NO;
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return;
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}
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[self reconfigureCaptureSessionInput];
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[self updateOrientation];
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[self updateDeviceCaptureFormat:format fps:fps];
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[self updateVideoDataOutputPixelFormat:format];
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[_captureSession startRunning];
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[_currentDevice unlockForConfiguration];
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_isRunning = YES;
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if (completionHandler) {
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completionHandler(nil);
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}
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}];
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}
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- (void)stopCaptureWithCompletionHandler:(nullable void (^)(void))completionHandler {
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_willBeRunning = NO;
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[RTCDispatcher
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dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
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block:^{
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RTCLogInfo("Stop");
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_currentDevice = nil;
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for (AVCaptureDeviceInput *oldInput in [_captureSession.inputs copy]) {
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[_captureSession removeInput:oldInput];
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}
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[_captureSession stopRunning];
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dispatch_async(dispatch_get_main_queue(), ^{
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[[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];
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});
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_isRunning = NO;
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if (completionHandler) {
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completionHandler();
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}
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}];
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}
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#pragma mark iOS notifications
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#if TARGET_OS_IPHONE
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- (void)deviceOrientationDidChange:(NSNotification *)notification {
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[RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
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block:^{
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[self updateOrientation];
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}];
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}
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#endif
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#pragma mark AVCaptureVideoDataOutputSampleBufferDelegate
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- (void)captureOutput:(AVCaptureOutput *)captureOutput
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didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
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fromConnection:(AVCaptureConnection *)connection {
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NSParameterAssert(captureOutput == _videoDataOutput);
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int minWarmupFrameCount = 12;
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_warmupFrameCount++;
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if (_warmupFrameCount < minWarmupFrameCount) {
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return;
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}
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if (CMSampleBufferGetNumSamples(sampleBuffer) != 1 || !CMSampleBufferIsValid(sampleBuffer) ||
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!CMSampleBufferDataIsReady(sampleBuffer)) {
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return;
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}
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CVPixelBufferRef pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
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if (pixelBuffer == nil) {
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return;
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}
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// Default to portrait orientation on iPhone.
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BOOL usingFrontCamera = NO;
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// Check the image's EXIF for the camera the image came from as the image could have been
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// delayed as we set alwaysDiscardsLateVideoFrames to NO.
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AVCaptureDevicePosition cameraPosition =
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[AVCaptureSession devicePositionForSampleBuffer:sampleBuffer];
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if (cameraPosition != AVCaptureDevicePositionUnspecified) {
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usingFrontCamera = AVCaptureDevicePositionFront == cameraPosition;
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} else {
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AVCaptureDeviceInput *deviceInput =
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(AVCaptureDeviceInput *)((AVCaptureInputPort *)connection.inputPorts.firstObject).input;
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usingFrontCamera = AVCaptureDevicePositionFront == deviceInput.device.position;
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}
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if (!_rotationLock) {
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switch (_orientation) {
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case UIDeviceOrientationPortrait:
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_rotation = RTCVideoRotation_90;
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break;
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case UIDeviceOrientationPortraitUpsideDown:
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_rotation = RTCVideoRotation_270;
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break;
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case UIDeviceOrientationLandscapeLeft:
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_rotation = usingFrontCamera ? RTCVideoRotation_180 : RTCVideoRotation_0;
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break;
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case UIDeviceOrientationLandscapeRight:
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_rotation = usingFrontCamera ? RTCVideoRotation_0 : RTCVideoRotation_180;
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break;
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case UIDeviceOrientationFaceUp:
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case UIDeviceOrientationFaceDown:
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case UIDeviceOrientationUnknown:
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// Ignore.
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break;
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}
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}
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TGRTCCVPixelBuffer *rtcPixelBuffer = [[TGRTCCVPixelBuffer alloc] initWithPixelBuffer:pixelBuffer];
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rtcPixelBuffer.shouldBeMirrored = usingFrontCamera;
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TGRTCCVPixelBuffer *uncroppedRtcPixelBuffer = rtcPixelBuffer;
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if (_aspectRatio > FLT_EPSILON) {
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float aspect = 1.0f / _aspectRatio;
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int width = rtcPixelBuffer.width;
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int height = rtcPixelBuffer.height;
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float aspectWidth = width;
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float aspectHeight = ((float)(width)) / aspect;
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int cropX = (int)((width - aspectWidth) / 2.0f);
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int cropY = (int)((height - aspectHeight) / 2.0f);
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width = (int)aspectWidth;
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width &= ~1;
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height = (int)aspectHeight;
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height &= ~1;
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height = MIN(rtcPixelBuffer.height, height + 16);
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if (width < rtcPixelBuffer.width || height < rtcPixelBuffer.height) {
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rtcPixelBuffer = [[TGRTCCVPixelBuffer alloc] initWithPixelBuffer:pixelBuffer adaptedWidth:width adaptedHeight:height cropWidth:width cropHeight:height cropX:cropX cropY:cropY];
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rtcPixelBuffer.shouldBeMirrored = usingFrontCamera;
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CVPixelBufferRef outputPixelBufferRef = NULL;
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OSType pixelFormat = CVPixelBufferGetPixelFormatType(rtcPixelBuffer.pixelBuffer);
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CVPixelBufferCreate(NULL, width, height, pixelFormat, NULL, &outputPixelBufferRef);
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if (outputPixelBufferRef) {
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int bufferSize = [rtcPixelBuffer bufferSizeForCroppingAndScalingToWidth:width height:width];
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if (_croppingBuffer.size() < bufferSize) {
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_croppingBuffer.resize(bufferSize);
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}
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if ([rtcPixelBuffer cropAndScaleTo:outputPixelBufferRef withTempBuffer:_croppingBuffer.data()]) {
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rtcPixelBuffer = [[TGRTCCVPixelBuffer alloc] initWithPixelBuffer:outputPixelBufferRef];
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rtcPixelBuffer.shouldBeMirrored = usingFrontCamera;
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}
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CVPixelBufferRelease(outputPixelBufferRef);
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}
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}
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}
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int64_t timeStampNs = CMTimeGetSeconds(CMSampleBufferGetPresentationTimeStamp(sampleBuffer)) *
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kNanosecondsPerSecond;
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RTCVideoFrame *videoFrame = [[RTCVideoFrame alloc] initWithBuffer:rtcPixelBuffer rotation:_rotation timeStampNs:timeStampNs];
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if (!_isPaused) {
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getObjCVideoSource(_source)->OnCapturedFrame(videoFrame);
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if (_uncroppedSink && uncroppedRtcPixelBuffer) {
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int64_t timeStampNs = CMTimeGetSeconds(CMSampleBufferGetPresentationTimeStamp(sampleBuffer)) *
|
|
kNanosecondsPerSecond;
|
|
RTCVideoFrame *frame = [[RTCVideoFrame alloc] initWithBuffer:uncroppedRtcPixelBuffer rotation:_rotation timeStampNs:timeStampNs];
|
|
|
|
const int64_t timestamp_us = frame.timeStampNs / rtc::kNumNanosecsPerMicrosec;
|
|
|
|
rtc::scoped_refptr<webrtc::VideoFrameBuffer> buffer;
|
|
buffer = new rtc::RefCountedObject<webrtc::ObjCFrameBuffer>(frame.buffer);
|
|
|
|
webrtc::VideoRotation rotation = static_cast<webrtc::VideoRotation>(frame.rotation);
|
|
|
|
_uncroppedSink->OnFrame(webrtc::VideoFrame::Builder()
|
|
.set_video_frame_buffer(buffer)
|
|
.set_rotation(rotation)
|
|
.set_timestamp_us(timestamp_us)
|
|
.build());
|
|
}
|
|
}
|
|
}
|
|
|
|
- (void)captureOutput:(AVCaptureOutput *)captureOutput
|
|
didDropSampleBuffer:(CMSampleBufferRef)sampleBuffer
|
|
fromConnection:(AVCaptureConnection *)connection {
|
|
NSString *droppedReason =
|
|
(__bridge NSString *)CMGetAttachment(sampleBuffer, kCMSampleBufferAttachmentKey_DroppedFrameReason, nil);
|
|
RTCLogError(@"Dropped sample buffer. Reason: %@", droppedReason);
|
|
}
|
|
|
|
#pragma mark - AVCaptureSession notifications
|
|
|
|
- (void)handleCaptureSessionInterruption:(NSNotification *)notification {
|
|
NSString *reasonString = nil;
|
|
NSNumber *reason = notification.userInfo[AVCaptureSessionInterruptionReasonKey];
|
|
if (reason) {
|
|
switch (reason.intValue) {
|
|
case AVCaptureSessionInterruptionReasonVideoDeviceNotAvailableInBackground:
|
|
reasonString = @"VideoDeviceNotAvailableInBackground";
|
|
break;
|
|
case AVCaptureSessionInterruptionReasonAudioDeviceInUseByAnotherClient:
|
|
reasonString = @"AudioDeviceInUseByAnotherClient";
|
|
break;
|
|
case AVCaptureSessionInterruptionReasonVideoDeviceInUseByAnotherClient:
|
|
reasonString = @"VideoDeviceInUseByAnotherClient";
|
|
break;
|
|
case AVCaptureSessionInterruptionReasonVideoDeviceNotAvailableWithMultipleForegroundApps:
|
|
reasonString = @"VideoDeviceNotAvailableWithMultipleForegroundApps";
|
|
break;
|
|
}
|
|
}
|
|
RTCLog(@"Capture session interrupted: %@", reasonString);
|
|
}
|
|
|
|
- (void)handleCaptureSessionInterruptionEnded:(NSNotification *)notification {
|
|
RTCLog(@"Capture session interruption ended.");
|
|
}
|
|
|
|
- (void)handleCaptureSessionRuntimeError:(NSNotification *)notification {
|
|
NSError *error = [notification.userInfo objectForKey:AVCaptureSessionErrorKey];
|
|
RTCLogError(@"Capture session runtime error: %@", error);
|
|
|
|
[RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
|
|
block:^{
|
|
if (error.code == AVErrorMediaServicesWereReset) {
|
|
[self handleNonFatalError];
|
|
} else {
|
|
[self handleFatalError];
|
|
}
|
|
}];
|
|
}
|
|
|
|
- (void)handleCaptureSessionDidStartRunning:(NSNotification *)notification {
|
|
RTCLog(@"Capture session started.");
|
|
|
|
[RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
|
|
block:^{
|
|
// If we successfully restarted after an unknown error,
|
|
// allow future retries on fatal errors.
|
|
_hasRetriedOnFatalError = NO;
|
|
}];
|
|
|
|
_inForegroundValue = true;
|
|
[self updateIsActiveValue];
|
|
}
|
|
|
|
- (void)handleCaptureSessionDidStopRunning:(NSNotification *)notification {
|
|
RTCLog(@"Capture session stopped.");
|
|
_inForegroundValue = false;
|
|
[self updateIsActiveValue];
|
|
}
|
|
|
|
- (void)updateIsActiveValue {
|
|
bool isActive = _inForegroundValue && !_isPaused;
|
|
if (isActive != _isActiveValue) {
|
|
_isActiveValue = isActive;
|
|
if (_isActiveUpdated) {
|
|
_isActiveUpdated(_isActiveValue);
|
|
}
|
|
}
|
|
}
|
|
|
|
- (void)handleFatalError {
|
|
[RTCDispatcher
|
|
dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
|
|
block:^{
|
|
if (!_hasRetriedOnFatalError) {
|
|
RTCLogWarning(@"Attempting to recover from fatal capture error.");
|
|
[self handleNonFatalError];
|
|
_hasRetriedOnFatalError = YES;
|
|
} else {
|
|
RTCLogError(@"Previous fatal error recovery failed.");
|
|
}
|
|
}];
|
|
}
|
|
|
|
- (void)handleNonFatalError {
|
|
[RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
|
|
block:^{
|
|
RTCLog(@"Restarting capture session after error.");
|
|
if (_isRunning) {
|
|
[_captureSession startRunning];
|
|
}
|
|
}];
|
|
}
|
|
|
|
#pragma mark - UIApplication notifications
|
|
|
|
- (void)handleApplicationDidBecomeActive:(NSNotification *)notification {
|
|
[RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
|
|
block:^{
|
|
if (_isRunning && !_captureSession.isRunning) {
|
|
RTCLog(@"Restarting capture session on active.");
|
|
_warmupFrameCount = 0;
|
|
[_captureSession startRunning];
|
|
}
|
|
}];
|
|
}
|
|
|
|
- (void)handleApplicationWillEnterForeground:(NSNotification *)notification {
|
|
[RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
|
|
block:^{
|
|
RTCLog(@"Resetting warmup due to backgrounding.");
|
|
_warmupFrameCount = 0;
|
|
}];
|
|
}
|
|
|
|
#pragma mark - Private
|
|
|
|
- (dispatch_queue_t)frameQueue {
|
|
if (!_frameQueue) {
|
|
_frameQueue =
|
|
dispatch_queue_create("org.webrtc.cameravideocapturer.video", DISPATCH_QUEUE_SERIAL);
|
|
dispatch_set_target_queue(_frameQueue,
|
|
dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0));
|
|
}
|
|
return _frameQueue;
|
|
}
|
|
|
|
- (BOOL)setupCaptureSession:(AVCaptureSession *)captureSession {
|
|
NSAssert(_captureSession == nil, @"Setup capture session called twice.");
|
|
_captureSession = captureSession;
|
|
_captureSession.sessionPreset = AVCaptureSessionPresetInputPriority;
|
|
_captureSession.usesApplicationAudioSession = true;
|
|
[self setupVideoDataOutput];
|
|
// Add the output.
|
|
if (![_captureSession canAddOutput:_videoDataOutput]) {
|
|
RTCLogError(@"Video data output unsupported.");
|
|
return NO;
|
|
}
|
|
[_captureSession addOutput:_videoDataOutput];
|
|
|
|
return YES;
|
|
}
|
|
|
|
- (void)setupVideoDataOutput {
|
|
NSAssert(_videoDataOutput == nil, @"Setup video data output called twice.");
|
|
AVCaptureVideoDataOutput *videoDataOutput = [[AVCaptureVideoDataOutput alloc] init];
|
|
|
|
// `videoDataOutput.availableVideoCVPixelFormatTypes` returns the pixel formats supported by the
|
|
// device with the most efficient output format first. Find the first format that we support.
|
|
NSSet<NSNumber *> *supportedPixelFormats = [TGRTCCVPixelBuffer supportedPixelFormats];
|
|
NSMutableOrderedSet *availablePixelFormats =
|
|
[NSMutableOrderedSet orderedSetWithArray:videoDataOutput.availableVideoCVPixelFormatTypes];
|
|
[availablePixelFormats intersectSet:supportedPixelFormats];
|
|
NSNumber *pixelFormat = availablePixelFormats.firstObject;
|
|
NSAssert(pixelFormat, @"Output device has no supported formats.");
|
|
|
|
_preferredOutputPixelFormat = [pixelFormat unsignedIntValue];
|
|
_outputPixelFormat = _preferredOutputPixelFormat;
|
|
videoDataOutput.videoSettings = @{(NSString *)kCVPixelBufferPixelFormatTypeKey : pixelFormat};
|
|
videoDataOutput.alwaysDiscardsLateVideoFrames = NO;
|
|
[videoDataOutput setSampleBufferDelegate:self queue:self.frameQueue];
|
|
_videoDataOutput = videoDataOutput;
|
|
}
|
|
|
|
- (void)updateVideoDataOutputPixelFormat:(AVCaptureDeviceFormat *)format {
|
|
FourCharCode mediaSubType = CMFormatDescriptionGetMediaSubType(format.formatDescription);
|
|
if (![[TGRTCCVPixelBuffer supportedPixelFormats] containsObject:@(mediaSubType)]) {
|
|
mediaSubType = _preferredOutputPixelFormat;
|
|
}
|
|
|
|
if (mediaSubType != _outputPixelFormat) {
|
|
_outputPixelFormat = mediaSubType;
|
|
_videoDataOutput.videoSettings =
|
|
@{ (NSString *)kCVPixelBufferPixelFormatTypeKey : @(mediaSubType) };
|
|
}
|
|
}
|
|
|
|
#pragma mark - Private, called inside capture queue
|
|
|
|
- (void)updateDeviceCaptureFormat:(AVCaptureDeviceFormat *)format fps:(NSInteger)fps {
|
|
NSAssert([RTCDispatcher isOnQueueForType:RTCDispatcherTypeCaptureSession],
|
|
@"updateDeviceCaptureFormat must be called on the capture queue.");
|
|
@try {
|
|
_currentDevice.activeFormat = format;
|
|
_currentDevice.activeVideoMinFrameDuration = CMTimeMake(1, (int32_t)fps);
|
|
} @catch (NSException *exception) {
|
|
RTCLogError(@"Failed to set active format!\n User info:%@", exception.userInfo);
|
|
return;
|
|
}
|
|
}
|
|
|
|
- (void)reconfigureCaptureSessionInput {
|
|
NSAssert([RTCDispatcher isOnQueueForType:RTCDispatcherTypeCaptureSession],
|
|
@"reconfigureCaptureSessionInput must be called on the capture queue.");
|
|
NSError *error = nil;
|
|
AVCaptureDeviceInput *input =
|
|
[AVCaptureDeviceInput deviceInputWithDevice:_currentDevice error:&error];
|
|
if (!input) {
|
|
RTCLogError(@"Failed to create front camera input: %@", error.localizedDescription);
|
|
return;
|
|
}
|
|
[_captureSession beginConfiguration];
|
|
for (AVCaptureDeviceInput *oldInput in [_captureSession.inputs copy]) {
|
|
[_captureSession removeInput:oldInput];
|
|
}
|
|
if ([_captureSession canAddInput:input]) {
|
|
[_captureSession addInput:input];
|
|
} else {
|
|
RTCLogError(@"Cannot add camera as an input to the session.");
|
|
}
|
|
[_captureSession commitConfiguration];
|
|
}
|
|
|
|
- (void)updateOrientation {
|
|
NSAssert([RTCDispatcher isOnQueueForType:RTCDispatcherTypeCaptureSession],
|
|
@"updateOrientation must be called on the capture queue.");
|
|
_orientation = [UIDevice currentDevice].orientation;
|
|
}
|
|
|
|
@end
|