iOS实时录音和播放功能

#import <Foundation/Foundation.h>@interface EYAudio : NSObject// 播放的数据流数据- (void)playWithData:(NSData *)data;// 声音播放出现问题的时候可以重置一下- (void)resetPlay;// 停止播放- (void)stop;@end

#import <AVFoundation/AVFoundation.h>#import <AudioToolbox/AudioToolbox.h>#define MIN_SIZE_PER_FRAME 1920  //每个包的大小,室内机要求为960,具体看下面的配置信息#define QUEUE_BUFFER_SIZE 3   //缓冲器个数#define SAMPLE_RATE    16000 //采样频率@interface EYAudio(){  AudioQueueRef audioQueue;                 //音频播放队列  AudioStreamBasicDescription _audioDescription;  AudioQueueBufferRef audioQueueBuffers[QUEUE_BUFFER_SIZE]; //音频缓存  BOOL audioQueueBufferUsed[QUEUE_BUFFER_SIZE];       //判断音频缓存是否在使用  NSLock *sysnLock;  NSMutableData *tempData;  OSStatus osState;}@end@implementation EYAudio#pragma mark - 提前设置AVAudioSessionCategoryMultiRoute 播放和录音+ (void)initialize{  NSError *error = nil;  //只想要播放:AVAudioSessionCategoryPlayback  //只想要录音:AVAudioSessionCategoryRecord  //想要"播放和录音"同时进行 必须设置为:AVAudioSessionCategoryMultiRoute 而不是AVAudioSessionCategoryPlayAndRecord(设置这个不好使)  BOOL ret = [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryMultiRoute error:&error];  if (!ret) {    NSLog(@"设置声音环境失败");    return;  }  //启用audio session  ret = [[AVAudioSession sharedInstance] setActive:YES error:&error];  if (!ret)  {    NSLog(@"启动失败");    return;  }}- (void)resetPlay{  if (audioQueue != nil) {    AudioQueueReset(audioQueue);  }}- (void)stop{  if (audioQueue != nil) {    AudioQueueStop(audioQueue,true);  }  audioQueue = nil;  sysnLock = nil;}- (instancetype)init{  self = [super init];  if (self) {    sysnLock = [[NSLock alloc]init];    //设置音频参数 具体的信息需要问后台    _audioDescription.mSampleRate = SAMPLE_RATE;    _audioDescription.mFormatID = kAudioFormatLinearPCM;    _audioDescription.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;    //1单声道    _audioDescription.mChannelsPerFrame = 1;    //每一个packet一侦数据,每个数据包下的桢数，即每个数据包里面有多少桢    _audioDescription.mFramesPerPacket = 1;    //每个采样点16bit量化 语音每采样点占用位数    _audioDescription.mBitsPerChannel = 16;    _audioDescription.mBytesPerFrame = (_audioDescription.mBitsPerChannel / 8) * _audioDescription.mChannelsPerFrame;    //每个数据包的bytes总数，每桢的bytes数*每个数据包的桢数    _audioDescription.mBytesPerPacket = _audioDescription.mBytesPerFrame * _audioDescription.mFramesPerPacket;    // 使用player的内部线程播放 新建输出    AudioQueueNewOutput(&_audioDescription, AudioPlayerAQInputCallback, (__bridge void * _Nullable)(self), nil, 0, 0, &audioQueue);    // 设置音量    AudioQueueSetParameter(audioQueue, kAudioQueueParam_Volume, 1.0);    // 初始化需要的缓冲区    for (int i = 0; i < QUEUE_BUFFER_SIZE; i++) {      audioQueueBufferUsed[i] = false;      osState = AudioQueueAllocateBuffer(audioQueue, MIN_SIZE_PER_FRAME, &audioQueueBuffers[i]);    }    osState = AudioQueueStart(audioQueue, NULL);    if (osState != noErr) {      NSLog(@"AudioQueueStart Error");    }  }  return self;}// 播放数据-(void)playWithData:(NSData *)data{  [sysnLock lock];  tempData = [NSMutableData new];  [tempData appendData: data];  NSUInteger len = tempData.length;  Byte *bytes = (Byte*)malloc(len);  [tempData getBytes:bytes length: len];  int i = 0;  while (true) {    if (!audioQueueBufferUsed[i]) {      audioQueueBufferUsed[i] = true;      break;    }else {      i++;      if (i >= QUEUE_BUFFER_SIZE) {        i = 0;      }    }  }  audioQueueBuffers[i] -> mAudioDataByteSize = (unsigned int)len;  // 把bytes的头地址开始的len字节给mAudioData,向第i个缓冲器  memcpy(audioQueueBuffers[i] -> mAudioData, bytes, len);  // 释放对象  free(bytes);  //将第i个缓冲器放到队列中,剩下的都交给系统了  AudioQueueEnqueueBuffer(audioQueue, audioQueueBuffers[i], 0, NULL);  [sysnLock unlock];}// ************************** 回调 **********************************// 回调回来把buffer状态设为未使用static void AudioPlayerAQInputCallback(void* inUserData,AudioQueueRef audioQueueRef, AudioQueueBufferRef audioQueueBufferRef) {  EYAudio* audio = (__bridge EYAudio*)inUserData;  [audio resetBufferState:audioQueueRef and:audioQueueBufferRef];}- (void)resetBufferState:(AudioQueueRef)audioQueueRef and:(AudioQueueBufferRef)audioQueueBufferRef {  // 防止空数据让audioqueue后续都不播放,为了安全防护一下  if (tempData.length == 0) {    audioQueueBufferRef->mAudioDataByteSize = 1;    Byte* byte = audioQueueBufferRef->mAudioData;    byte = 0;    AudioQueueEnqueueBuffer(audioQueueRef, audioQueueBufferRef, 0, NULL);  }  for (int i = 0; i < QUEUE_BUFFER_SIZE; i++) {    // 将这个buffer设为未使用    if (audioQueueBufferRef == audioQueueBuffers[i]) {      audioQueueBufferUsed[i] = false;    }  }}@end

#import <Foundation/Foundation.h>@interface ESARecord : NSObject//开始录音- (void)startRecording;//停止录音- (void)stopRecording;@end

#import "ESARecord.h"#import <AudioToolbox/AudioToolbox.h>#define QUEUE_BUFFER_SIZE 3   // 输出音频队列缓冲个数#define kDefaultBufferDurationSeconds 0.03//调整这个值使得录音的缓冲区大小为960,实际会小于或等于960,需要处理小于960的情况#define kDefaultSampleRate 16000  //定义采样率为16000extern NSString * const ESAIntercomNotifationRecordString;static BOOL isRecording = NO;@interface ESARecord(){  AudioQueueRef _audioQueue;             //输出音频播放队列  AudioStreamBasicDescription _recordFormat;  AudioQueueBufferRef _audioBuffers[QUEUE_BUFFER_SIZE]; //输出音频缓存}@property (nonatomic, assign) BOOL isRecording;@end@implementation ESARecord- (instancetype)init{  self = [super init];  if (self) {    //重置下    memset(&_recordFormat, 0, sizeof(_recordFormat));    _recordFormat.mSampleRate = kDefaultSampleRate;    _recordFormat.mChannelsPerFrame = 1;    _recordFormat.mFormatID = kAudioFormatLinearPCM;    _recordFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked;    _recordFormat.mBitsPerChannel = 16;    _recordFormat.mBytesPerPacket = _recordFormat.mBytesPerFrame = (_recordFormat.mBitsPerChannel / 8) * _recordFormat.mChannelsPerFrame;    _recordFormat.mFramesPerPacket = 1;    //初始化音频输入队列    AudioQueueNewInput(&_recordFormat, inputBufferHandler, (__bridge void *)(self), NULL, NULL, 0, &_audioQueue);    //计算估算的缓存区大小    int frames = (int)ceil(kDefaultBufferDurationSeconds * _recordFormat.mSampleRate);    int bufferByteSize = frames * _recordFormat.mBytesPerFrame;    NSLog(@"缓存区大小%d",bufferByteSize);    //创建缓冲器    for (int i = 0; i < QUEUE_BUFFER_SIZE; i++){      AudioQueueAllocateBuffer(_audioQueue, bufferByteSize, &_audioBuffers[i]);      AudioQueueEnqueueBuffer(_audioQueue, _audioBuffers[i], 0, NULL);    }  }  return self;}-(void)startRecording{  // 开始录音  AudioQueueStart(_audioQueue, NULL);  isRecording = YES;}void inputBufferHandler(void *inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffer, const AudioTimeStamp *inStartTime,UInt32 inNumPackets, const AudioStreamPacketDescription *inPacketDesc){  if (inNumPackets > 0) {    ESARecord *recorder = (__bridge ESARecord*)inUserData;    [recorder processAudioBuffer:inBuffer withQueue:inAQ];  }    if (isRecording) {    AudioQueueEnqueueBuffer(inAQ, inBuffer, 0, NULL);  }}- (void)processAudioBuffer:(AudioQueueBufferRef )audioQueueBufferRef withQueue:(AudioQueueRef )audioQueueRef{  NSMutableData * dataM = [NSMutableData dataWithBytes:audioQueueBufferRef->mAudioData length:audioQueueBufferRef->mAudioDataByteSize];    if (dataM.length < 960) { //处理长度小于960的情况,此处是补00    Byte byte[] = {0x00};    NSData * zeroData = [[NSData alloc] initWithBytes:byte length:1];    for (NSUInteger i = dataM.length; i < 960; i++) {      [dataM appendData:zeroData];    }  }  // NSLog(@"实时录音的数据--%@", dataM);  //此处是发通知将dataM 传递出去  [[NSNotificationCenter defaultCenter] postNotificationName:@"EYRecordNotifacation" object:@{@"data" : dataM}];}-(void)stopRecording{  if (isRecording)  {    isRecording = NO;        //停止录音队列和移除缓冲区,以及关闭session，这里无需考虑成功与否    AudioQueueStop(_audioQueue, true);    //移除缓冲区,true代表立即结束录制，false代表将缓冲区处理完再结束    AudioQueueDispose(_audioQueue, true);  }  NSLog(@"停止录音");}@end