RTCCameraVideoCapturer.h

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/*

 *  Copyright 2017 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 <AVFoundation/AVFoundation.h>

#import <Foundation/Foundation.h>

#import "RTCMacros.h"

#import "RTCVideoCapturer.h"

NS_ASSUME_NONNULL_BEGIN

RTC_OBJC_EXPORT

// Camera capture that implements RTCVideoCapturer. Delivers frames to a

// RTCVideoCapturerDelegate (usually RTCVideoSource).

NS_EXTENSION_UNAVAILABLE_IOS("Camera not available in app extensions.")

@interface RTC_OBJC_TYPE (RTCCameraVideoCapturer) : RTC_OBJC_TYPE(RTCVideoCapturer)

// Capture session that is used for capturing. Valid from initialization to dealloc.

@property(readonly, nonatomic) AVCaptureSession *captureSession;

// Returns list of available capture devices that support video capture.

+ (NSArray<AVCaptureDevice *> *)captureDevicesWithDeviceTypes:

    (NSArray<AVCaptureDeviceType> *)deviceTypes;

// Returns list of default capture devices types

+ (NSArray<AVCaptureDeviceType> *)defaultCaptureDeviceTypes;

// Returns list of formats that are supported by this class for this device.

+ (NSArray<AVCaptureDeviceFormat *> *)supportedFormatsForDevice:(AVCaptureDevice *)device;

// Returns the most efficient supported output pixel format for this capturer.

- (FourCharCode)preferredOutputPixelFormat;

// Starts the capture session asynchronously and notifies callback on completion.

// The device will capture video in the format given in the `format` parameter. If the pixel format

// in `format` is supported by the WebRTC pipeline, the same pixel format will be used for the

// output. Otherwise, the format returned by `preferredOutputPixelFormat` will be used.

- (void)startCaptureWithDevice:(AVCaptureDevice *)device

                        format:(AVCaptureDeviceFormat *)format

                           fps:(NSInteger)fps

             completionHandler:(nullable void (^)(NSError *_Nullable))completionHandler;

// Stops the capture session asynchronously and notifies callback on completion.

- (void)stopCaptureWithCompletionHandler:(nullable void (^)(void))completionHandler;

// Starts the capture session asynchronously.

- (void)startCaptureWithDevice:(AVCaptureDevice *)device

                        format:(AVCaptureDeviceFormat *)format

                           fps:(NSInteger)fps;

// Stops the capture session asynchronously.

- (void)stopCapture;

@end

NS_ASSUME_NONNULL_END