//
// AudioVideoCaptureViewController.m
// live
//
// Created by lujunjie on 2016/10/31.
// Copyright © 2016年 lujunjie. All rights reserved.
// #import "AudioVideoCaptureViewController.h"
#import <AVFoundation/AVFoundation.h>
@interface AudioVideoCaptureViewController ()<AVCaptureVideoDataOutputSampleBufferDelegate,AVCaptureAudioDataOutputSampleBufferDelegate>
@property (nonatomic,strong) AVCaptureSession *mCaptureSession;
@property (nonatomic,strong) AVCaptureDeviceInput *mCaptureDeviceInput;
@property (nonatomic ,strong) AVCaptureDeviceInput *mCaptureAudioDeviceInput;//负责从AVCaptureDevice获得输入数据
@property (nonatomic,strong) AVCaptureVideoDataOutput *mCaptureVideoOutput;
@property (nonatomic , strong) AVCaptureAudioDataOutput *mCaptureAudioOutput;
@property (nonatomic,strong) dispatch_queue_t mProcessQueue;
@property (nonatomic,strong) dispatch_queue_t mCaptureQueue;
@property (nonatomic,strong) dispatch_queue_t mEncodeQueue; @property (nonatomic,strong) AVCaptureVideoPreviewLayer *mPreviewLayer;
@end @implementation AudioVideoCaptureViewController - (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view. // a、AVCaptureDevice。这里代表抽象的硬件设备。
//
// b、AVCaptureInput。这里代表输入设备（可以是它的子类），它配置抽象硬件设备的ports。
//
// c、AVCaptureOutput。它代表输出数据，管理着输出到一个movie或者图像。
//
// d、AVCaptureSession。它是input和output的桥梁。它协调着intput到output的数据传输。
[self startCapture];
} - (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
} - (void)startCapture {
// 新建会话，设置图像大小
self.mCaptureSession = [[AVCaptureSession alloc] init];
self.mCaptureSession.sessionPreset = AVCaptureSessionPreset640x480; self.mCaptureQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, );
self.mEncodeQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, ); AVCaptureDevice *inputCamera = nil;
// 获取前置摄像头
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for (AVCaptureDevice *device in devices)
{
if ([device position] == AVCaptureDevicePositionFront)
{
inputCamera = device;
}
}
// 把摄像头设置到输入设备，并添加到会话
self.mCaptureDeviceInput = [[AVCaptureDeviceInput alloc] initWithDevice:inputCamera error:nil]; if ([self.mCaptureSession canAddInput:self.mCaptureDeviceInput]) {
[self.mCaptureSession addInput:self.mCaptureDeviceInput];
} // 设置输出设备的参数，并把输出设备添加到会话
self.mCaptureVideoOutput = [[AVCaptureVideoDataOutput alloc] init];
[self.mCaptureVideoOutput setAlwaysDiscardsLateVideoFrames:NO]; [self.mCaptureVideoOutput setVideoSettings:[NSDictionary dictionaryWithObject:[NSNumber numberWithInt:kCVPixelFormatType_420YpCbCr8BiPlanarFullRange] forKey:(id)kCVPixelBufferPixelFormatTypeKey]]; [self.mCaptureVideoOutput setSampleBufferDelegate:self queue:self.mCaptureQueue];
if ([self.mCaptureSession canAddOutput:self.mCaptureVideoOutput]) {
[self.mCaptureSession addOutput:self.mCaptureVideoOutput];
}
// 输出设置缩放裁剪系数设置、建立视频音频链接
AVCaptureConnection *connection = [self.mCaptureVideoOutput connectionWithMediaType:AVMediaTypeVideo];
[connection setVideoOrientation:AVCaptureVideoOrientationPortrait]; // 视频
self.mPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.mCaptureSession];
[self.mPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspect]; //设置预览时的视频缩放方式
[self.mPreviewLayer setFrame:self.view.bounds];
[self.view.layer addSublayer:self.mPreviewLayer]; // 获取麦克风设备
AVCaptureDevice *audioDevice = [[AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio] lastObject];
// 把设备设置到输入设备，并添加到会话
self.mCaptureAudioDeviceInput = [[AVCaptureDeviceInput alloc] initWithDevice:audioDevice error:nil];
if ([self.mCaptureSession canAddInput:self.mCaptureAudioDeviceInput]) {
[self.mCaptureSession addInput:self.mCaptureAudioDeviceInput];
}
// 设置输出设备的参数，并把输出设备添加到会话
self.mCaptureAudioOutput = [[AVCaptureAudioDataOutput alloc] init];
if ([self.mCaptureSession canAddOutput:self.mCaptureAudioOutput]) {
[self.mCaptureSession addOutput:self.mCaptureAudioOutput];
}
[self.mCaptureAudioOutput setSampleBufferDelegate:self queue:self.mCaptureQueue]; [self.mCaptureSession startRunning];
} - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection {
if (captureOutput == self.mCaptureVideoOutput) {
dispatch_sync(self.mEncodeQueue, ^{
NSLog(@"视频：：：sampleBuffer");
});
}
else {
dispatch_sync(self.mEncodeQueue, ^{
NSLog(@"音频：：：sampleBuffer");
});
}
} @end