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Unified Diff: webrtc/sdk/objc/Framework/Classes/RTCAVFoundationVideoCapturerInternal.mm

Issue 2890513002: Revert of Split iOS sdk in to separate targets (Closed)
Patch Set: Created 3 years, 7 months ago
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Index: webrtc/sdk/objc/Framework/Classes/RTCAVFoundationVideoCapturerInternal.mm
diff --git a/webrtc/sdk/objc/Framework/Classes/RTCAVFoundationVideoCapturerInternal.mm b/webrtc/sdk/objc/Framework/Classes/RTCAVFoundationVideoCapturerInternal.mm
new file mode 100644
index 0000000000000000000000000000000000000000..166a609824941775e629936bb6e4c03905d20242
--- /dev/null
+++ b/webrtc/sdk/objc/Framework/Classes/RTCAVFoundationVideoCapturerInternal.mm
@@ -0,0 +1,503 @@
+/*
+ * Copyright 2016 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.
+ */
+
+#import "RTCAVFoundationVideoCapturerInternal.h"
+
+#import <Foundation/Foundation.h>
+#if TARGET_OS_IPHONE
+#import <UIKit/UIKit.h>
+#import "WebRTC/UIDevice+RTCDevice.h"
+#endif
+
+#import "RTCDispatcher+Private.h"
+#import "WebRTC/RTCLogging.h"
+
+#include "avfoundationformatmapper.h"
+
+@implementation RTCAVFoundationVideoCapturerInternal {
+ // Keep pointers to inputs for convenience.
+ AVCaptureDeviceInput *_frontCameraInput;
+ AVCaptureDeviceInput *_backCameraInput;
+ AVCaptureVideoDataOutput *_videoDataOutput;
+ // The cricket::VideoCapturer that owns this class. Should never be NULL.
+ webrtc::AVFoundationVideoCapturer *_capturer;
+ webrtc::VideoRotation _rotation;
+ BOOL _hasRetriedOnFatalError;
+ BOOL _isRunning;
+ BOOL _hasStarted;
+ rtc::CriticalSection _crit;
+}
+
+@synthesize captureSession = _captureSession;
+@synthesize frameQueue = _frameQueue;
+@synthesize useBackCamera = _useBackCamera;
+
+@synthesize isRunning = _isRunning;
+@synthesize hasStarted = _hasStarted;
+
+// This is called from the thread that creates the video source, which is likely
+// the main thread.
+- (instancetype)initWithCapturer:(webrtc::AVFoundationVideoCapturer *)capturer {
+ RTC_DCHECK(capturer);
+ if (self = [super init]) {
+ _capturer = capturer;
+ // Create the capture session and all relevant inputs and outputs. We need
+ // to do this in init because the application may want the capture session
+ // before we start the capturer for e.g. AVCapturePreviewLayer. All objects
+ // created here are retained until dealloc and never recreated.
+ if (![self setupCaptureSession]) {
+ return nil;
+ }
+ NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
+#if TARGET_OS_IPHONE
+ [center addObserver:self
+ selector:@selector(deviceOrientationDidChange:)
+ name:UIDeviceOrientationDidChangeNotification
+ object:nil];
+ [center addObserver:self
+ selector:@selector(handleCaptureSessionInterruption:)
+ name:AVCaptureSessionWasInterruptedNotification
+ object:_captureSession];
+ [center addObserver:self
+ selector:@selector(handleCaptureSessionInterruptionEnded:)
+ name:AVCaptureSessionInterruptionEndedNotification
+ object:_captureSession];
+ [center addObserver:self
+ selector:@selector(handleApplicationDidBecomeActive:)
+ name:UIApplicationDidBecomeActiveNotification
+ object:[UIApplication sharedApplication]];
+#endif
+ [center addObserver:self
+ selector:@selector(handleCaptureSessionRuntimeError:)
+ name:AVCaptureSessionRuntimeErrorNotification
+ object:_captureSession];
+ [center addObserver:self
+ selector:@selector(handleCaptureSessionDidStartRunning:)
+ name:AVCaptureSessionDidStartRunningNotification
+ object:_captureSession];
+ [center addObserver:self
+ selector:@selector(handleCaptureSessionDidStopRunning:)
+ name:AVCaptureSessionDidStopRunningNotification
+ object:_captureSession];
+ }
+ return self;
+}
+
+- (void)dealloc {
+ RTC_DCHECK(!self.hasStarted);
+ [[NSNotificationCenter defaultCenter] removeObserver:self];
+ _capturer = nullptr;
+}
+
+- (AVCaptureSession *)captureSession {
+ return _captureSession;
+}
+
+- (AVCaptureDevice *)getActiveCaptureDevice {
+ return self.useBackCamera ? _backCameraInput.device : _frontCameraInput.device;
+}
+
+- (nullable AVCaptureDevice *)frontCaptureDevice {
+ return _frontCameraInput.device;
+}
+
+- (nullable AVCaptureDevice *)backCaptureDevice {
+ return _backCameraInput.device;
+}
+
+- (dispatch_queue_t)frameQueue {
+ if (!_frameQueue) {
+ _frameQueue =
+ dispatch_queue_create("org.webrtc.avfoundationvideocapturer.video", DISPATCH_QUEUE_SERIAL);
+ dispatch_set_target_queue(_frameQueue,
+ dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0));
+ }
+ return _frameQueue;
+}
+
+// Called from any thread (likely main thread).
+- (BOOL)canUseBackCamera {
+ return _backCameraInput != nil;
+}
+
+// Called from any thread (likely main thread).
+- (BOOL)useBackCamera {
+ @synchronized(self) {
+ return _useBackCamera;
+ }
+}
+
+// Called from any thread (likely main thread).
+- (void)setUseBackCamera:(BOOL)useBackCamera {
+ if (!self.canUseBackCamera) {
+ if (useBackCamera) {
+ RTCLogWarning(@"No rear-facing camera exists or it cannot be used;"
+ "not switching.");
+ }
+ return;
+ }
+ @synchronized(self) {
+ if (_useBackCamera == useBackCamera) {
+ return;
+ }
+ _useBackCamera = useBackCamera;
+ [self updateSessionInputForUseBackCamera:useBackCamera];
+ }
+}
+
+// Called from WebRTC thread.
+- (void)start {
+ if (self.hasStarted) {
+ return;
+ }
+ self.hasStarted = YES;
+ [RTCDispatcher
+ dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
+ block:^{
+#if TARGET_OS_IPHONE
+ // Default to portrait orientation on iPhone. This will be reset in
+ // updateOrientation unless orientation is unknown/faceup/facedown.
+ _rotation = webrtc::kVideoRotation_90;
+#else
+ // No rotation on Mac.
+ _rotation = webrtc::kVideoRotation_0;
+#endif
+ [self updateOrientation];
+#if TARGET_OS_IPHONE
+ [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
+#endif
+ AVCaptureSession *captureSession = self.captureSession;
+ [captureSession startRunning];
+ }];
+}
+
+// Called from same thread as start.
+- (void)stop {
+ if (!self.hasStarted) {
+ return;
+ }
+ self.hasStarted = NO;
+ // Due to this async block, it's possible that the ObjC object outlives the
+ // C++ one. In order to not invoke functions on the C++ object, we set
+ // hasStarted immediately instead of dispatching it async.
+ [RTCDispatcher
+ dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
+ block:^{
+ [_videoDataOutput setSampleBufferDelegate:nil queue:nullptr];
+ [_captureSession stopRunning];
+#if TARGET_OS_IPHONE
+ [[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];
+#endif
+ }];
+}
+
+#pragma mark iOS notifications
+
+#if TARGET_OS_IPHONE
+- (void)deviceOrientationDidChange:(NSNotification *)notification {
+ [RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
+ block:^{
+ [self updateOrientation];
+ }];
+}
+#endif
+
+#pragma mark AVCaptureVideoDataOutputSampleBufferDelegate
+
+- (void)captureOutput:(AVCaptureOutput *)captureOutput
+ didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
+ fromConnection:(AVCaptureConnection *)connection {
+ NSParameterAssert(captureOutput == _videoDataOutput);
+ if (!self.hasStarted) {
+ return;
+ }
+ _capturer->CaptureSampleBuffer(sampleBuffer, _rotation);
+}
+
+- (void)captureOutput:(AVCaptureOutput *)captureOutput
+ didDropSampleBuffer:(CMSampleBufferRef)sampleBuffer
+ fromConnection:(AVCaptureConnection *)connection {
+ RTCLogError(@"Dropped sample buffer.");
+}
+
+#pragma mark - AVCaptureSession notifications
+
+- (void)handleCaptureSessionInterruption:(NSNotification *)notification {
+ NSString *reasonString = nil;
+#if defined(__IPHONE_9_0) && defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && \
+ __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_9_0
+ if ([UIDevice isIOS9OrLater]) {
+ 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;
+ }
+ }
+ }
+#endif
+ RTCLog(@"Capture session interrupted: %@", reasonString);
+ // TODO(tkchin): Handle this case.
+}
+
+- (void)handleCaptureSessionInterruptionEnded:(NSNotification *)notification {
+ RTCLog(@"Capture session interruption ended.");
+ // TODO(tkchin): Handle this case.
+}
+
+- (void)handleCaptureSessionRuntimeError:(NSNotification *)notification {
+ NSError *error = [notification.userInfo objectForKey:AVCaptureSessionErrorKey];
+ RTCLogError(@"Capture session runtime error: %@", error);
+
+ [RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
+ block:^{
+#if TARGET_OS_IPHONE
+ if (error.code == AVErrorMediaServicesWereReset) {
+ [self handleNonFatalError];
+ } else {
+ [self handleFatalError];
+ }
+#else
+ [self handleFatalError];
+#endif
+ }];
+}
+
+- (void)handleCaptureSessionDidStartRunning:(NSNotification *)notification {
+ RTCLog(@"Capture session started.");
+
+ self.isRunning = YES;
+ [RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
+ block:^{
+ // If we successfully restarted after an unknown error,
+ // allow future retries on fatal errors.
+ _hasRetriedOnFatalError = NO;
+ }];
+}
+
+- (void)handleCaptureSessionDidStopRunning:(NSNotification *)notification {
+ RTCLog(@"Capture session stopped.");
+ self.isRunning = NO;
+}
+
+- (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:^{
+ if (self.hasStarted) {
+ RTCLog(@"Restarting capture session after error.");
+ [self.captureSession startRunning];
+ }
+ }];
+}
+
+#if TARGET_OS_IPHONE
+
+#pragma mark - UIApplication notifications
+
+- (void)handleApplicationDidBecomeActive:(NSNotification *)notification {
+ [RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
+ block:^{
+ if (self.hasStarted && !self.captureSession.isRunning) {
+ RTCLog(@"Restarting capture session on active.");
+ [self.captureSession startRunning];
+ }
+ }];
+}
+
+#endif // TARGET_OS_IPHONE
+
+#pragma mark - Private
+
+- (BOOL)setupCaptureSession {
+ AVCaptureSession *captureSession = [[AVCaptureSession alloc] init];
+#if defined(WEBRTC_IOS)
+ captureSession.usesApplicationAudioSession = NO;
+#endif
+ // Add the output.
+ AVCaptureVideoDataOutput *videoDataOutput = [self videoDataOutput];
+ if (![captureSession canAddOutput:videoDataOutput]) {
+ RTCLogError(@"Video data output unsupported.");
+ return NO;
+ }
+ [captureSession addOutput:videoDataOutput];
+
+ // Get the front and back cameras. If there isn't a front camera
+ // give up.
+ AVCaptureDeviceInput *frontCameraInput = [self frontCameraInput];
+ AVCaptureDeviceInput *backCameraInput = [self backCameraInput];
+ if (!frontCameraInput) {
+ RTCLogError(@"No front camera for capture session.");
+ return NO;
+ }
+
+ // Add the inputs.
+ if (![captureSession canAddInput:frontCameraInput] ||
+ (backCameraInput && ![captureSession canAddInput:backCameraInput])) {
+ RTCLogError(@"Session does not support capture inputs.");
+ return NO;
+ }
+ AVCaptureDeviceInput *input = self.useBackCamera ? backCameraInput : frontCameraInput;
+ [captureSession addInput:input];
+
+ _captureSession = captureSession;
+ return YES;
+}
+
+- (AVCaptureVideoDataOutput *)videoDataOutput {
+ if (!_videoDataOutput) {
+ // Make the capturer output NV12. Ideally we want I420 but that's not
+ // currently supported on iPhone / iPad.
+ AVCaptureVideoDataOutput *videoDataOutput = [[AVCaptureVideoDataOutput alloc] init];
+ videoDataOutput.videoSettings = @{
+ (NSString *)
+ // TODO(denicija): Remove this color conversion and use the original capture format directly.
+ kCVPixelBufferPixelFormatTypeKey : @(kCVPixelFormatType_420YpCbCr8BiPlanarFullRange)
+ };
+ videoDataOutput.alwaysDiscardsLateVideoFrames = NO;
+ [videoDataOutput setSampleBufferDelegate:self queue:self.frameQueue];
+ _videoDataOutput = videoDataOutput;
+ }
+ return _videoDataOutput;
+}
+
+- (AVCaptureDevice *)videoCaptureDeviceForPosition:(AVCaptureDevicePosition)position {
+ for (AVCaptureDevice *captureDevice in [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]) {
+ if (captureDevice.position == position) {
+ return captureDevice;
+ }
+ }
+ return nil;
+}
+
+- (AVCaptureDeviceInput *)frontCameraInput {
+ if (!_frontCameraInput) {
+#if TARGET_OS_IPHONE
+ AVCaptureDevice *frontCameraDevice =
+ [self videoCaptureDeviceForPosition:AVCaptureDevicePositionFront];
+#else
+ AVCaptureDevice *frontCameraDevice =
+ [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
+#endif
+ if (!frontCameraDevice) {
+ RTCLogWarning(@"Failed to find front capture device.");
+ return nil;
+ }
+ NSError *error = nil;
+ AVCaptureDeviceInput *frontCameraInput =
+ [AVCaptureDeviceInput deviceInputWithDevice:frontCameraDevice error:&error];
+ if (!frontCameraInput) {
+ RTCLogError(@"Failed to create front camera input: %@", error.localizedDescription);
+ return nil;
+ }
+ _frontCameraInput = frontCameraInput;
+ }
+ return _frontCameraInput;
+}
+
+- (AVCaptureDeviceInput *)backCameraInput {
+ if (!_backCameraInput) {
+ AVCaptureDevice *backCameraDevice =
+ [self videoCaptureDeviceForPosition:AVCaptureDevicePositionBack];
+ if (!backCameraDevice) {
+ RTCLogWarning(@"Failed to find front capture device.");
+ return nil;
+ }
+ NSError *error = nil;
+ AVCaptureDeviceInput *backCameraInput =
+ [AVCaptureDeviceInput deviceInputWithDevice:backCameraDevice error:&error];
+ if (!backCameraInput) {
+ RTCLogError(@"Failed to create front camera input: %@", error.localizedDescription);
+ return nil;
+ }
+ _backCameraInput = backCameraInput;
+ }
+ return _backCameraInput;
+}
+
+// Called from capture session queue.
+- (void)updateOrientation {
+#if TARGET_OS_IPHONE
+ switch ([UIDevice currentDevice].orientation) {
+ case UIDeviceOrientationPortrait:
+ _rotation = webrtc::kVideoRotation_90;
+ break;
+ case UIDeviceOrientationPortraitUpsideDown:
+ _rotation = webrtc::kVideoRotation_270;
+ break;
+ case UIDeviceOrientationLandscapeLeft:
+ _rotation =
+ _capturer->GetUseBackCamera() ? webrtc::kVideoRotation_0 : webrtc::kVideoRotation_180;
+ break;
+ case UIDeviceOrientationLandscapeRight:
+ _rotation =
+ _capturer->GetUseBackCamera() ? webrtc::kVideoRotation_180 : webrtc::kVideoRotation_0;
+ break;
+ case UIDeviceOrientationFaceUp:
+ case UIDeviceOrientationFaceDown:
+ case UIDeviceOrientationUnknown:
+ // Ignore.
+ break;
+ }
+#endif
+}
+
+// Update the current session input to match what's stored in _useBackCamera.
+- (void)updateSessionInputForUseBackCamera:(BOOL)useBackCamera {
+ [RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
+ block:^{
+ [_captureSession beginConfiguration];
+ AVCaptureDeviceInput *oldInput = _backCameraInput;
+ AVCaptureDeviceInput *newInput = _frontCameraInput;
+ if (useBackCamera) {
+ oldInput = _frontCameraInput;
+ newInput = _backCameraInput;
+ }
+ if (oldInput) {
+ // Ok to remove this even if it's not attached. Will be no-op.
+ [_captureSession removeInput:oldInput];
+ }
+ if (newInput) {
+ [_captureSession addInput:newInput];
+ }
+ [self updateOrientation];
+ AVCaptureDevice *newDevice = newInput.device;
+ const cricket::VideoFormat *format =
+ _capturer->GetCaptureFormat();
+ webrtc::SetFormatForCaptureDevice(
+ newDevice, _captureSession, *format);
+ [_captureSession commitConfiguration];
+ }];
+}
+
+@end

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