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* 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 <AVFoundation/AVFoundation.h>
#import <Foundation/Foundation.h>
#import "RTCMacros.h"
RTC_EXTERN const int kRTCAudioSessionPreferredNumberOfChannels;
RTC_EXTERN const double kRTCAudioSessionHighPerformanceSampleRate;
RTC_EXTERN const double kRTCAudioSessionLowComplexitySampleRate;
RTC_EXTERN const double kRTCAudioSessionHighPerformanceIOBufferDuration;
RTC_EXTERN const double kRTCAudioSessionLowComplexityIOBufferDuration;
// Struct to hold configuration values.
@interface RTC_OBJC_TYPE (RTCAudioSessionConfiguration) : NSObject
@property(nonatomic, strong) NSString *category;
@property(nonatomic, assign) AVAudioSessionCategoryOptions categoryOptions;
@property(nonatomic, strong) NSString *mode;
@property(nonatomic, assign) double sampleRate;
@property(nonatomic, assign) NSTimeInterval ioBufferDuration;
@property(nonatomic, assign) NSInteger inputNumberOfChannels;
@property(nonatomic, assign) NSInteger outputNumberOfChannels;
/** Initializes configuration to defaults. */
- (instancetype)init NS_DESIGNATED_INITIALIZER;
/** Returns the current configuration of the audio session. */
+ (instancetype)currentConfiguration;
/** Returns the configuration that WebRTC needs. */
+ (instancetype)webRTCConfiguration;
/** Provide a way to override the default configuration. */
+ (void)setWebRTCConfiguration:(RTC_OBJC_TYPE(RTCAudioSessionConfiguration) *)configuration;