1、AudioQueue代理回调获取音频数据：
2、传入data数据获取音量大小
// .h文件
// AudioQueueTool.h
// 语音
// 楚高尚
// Created by sylincom on 2019/11/29.
// Copyright © 2019 sylincom. All rights reserved.
//
#import
#define kNumberAudioQueueBuffers3// 定义了三个缓冲区
NS_ASSUME_NONNULL_BEGIN
@class AudioQueueTool;
@protocolAudioQueueToolDelegate
//AudioQueue
- (void)AQRecorder:(AudioQueueTool*)recorder didRecivedBuffer:(Byte*)buffer length:(NSInteger)length;
- (void)AQRecorder:(AudioQueueTool*)recorder finishWithError:(NSError*)error;
- (void)AQCallBackVoiceGrade:(int)voiceGrade;
@end
@interfaceAudioQueueTool :NSObject
@property (nonatomic, weak) id<AudioQueueToolDelegate> delegate;
+ (instancetype)shared;
- (void)start;
- (void)stop;
@end
NS_ASSUME_NONNULL_END
//.m文件
//
// AudioQueueTool.m
// 语音
// 楚高尚
// Created by sylincom on 2019/11/29.
// Copyright © 2019 sylincom. All rights reserved.
//
#import "AudioQueueTool.h"
#import
typedefstructAQCallbackStruct {
AudioStreamBasicDescription mDataFormat;
AudioQueueRef queue;
AudioQueueBufferRef mBuffers[kNumberAudioQueueBuffers];
AudioFileIDoutputFile;
unsignedlongframeSize;
longlongrecPtr;
intrun;
} AQCallbackStruct;
@interface AudioQueueTool ()
@property (nonatomic, assign) AQCallbackStruct aqc;
@property (nonatomic, strong) NSTimer *heartTime;
- (void)processAudioBuffer:(AudioQueueBufferRef)buffer withQueue:(AudioQueueRef)queue;
@end
staticvoidAQInputCallback(void*inUserData, AudioQueueRef inAudioQueue, AudioQueueBufferRef inBuffer,
constAudioTimeStamp *inStartTime, UInt32 nNumPackets,constAudioStreamPacketDescription *inPacketDesc) {
AudioQueueTool *engine = (__bridgeAudioQueueTool *)inUserData;
if(inBuffer->mAudioDataByteSize >0) {
[engine processAudioBuffer:inBuffer withQueue:inAudioQueue];
}
if(engine.aqc.run) {
AudioQueueEnqueueBuffer(engine.aqc.queue, inBuffer,0,NULL);
}
}
@implementation AudioQueueTool
- (void)dealloc {
AudioQueueStop(_aqc.queue,true);
_aqc.run =0;
AudioQueueDispose(_aqc.queue,true);
}
+ (instancetype)shared {
staticAudioQueueTool *recorder =nil;
staticdispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
recorder = [[AudioQueueTool alloc] init];
});
returnrecorder;
}
- (instancetype)init {
if(self= [superinit]) {
}
return self;
}
#pragma mark - 开始录音
- (void)start {
// NSLog(@"AudioQueueTool--->mainThread:%@,current thread:%@", [NSThread mainThread], [NSThread currentThread]);
// 开启录音通道
NSError *error =nil;
//设置audio session的category
intret = [[AVAudioSession sharedInstance]
setCategory:AVAudioSessionCategoryPlayAndRecord
error:
&
error];//注意，这里选的是AVAudioSessionCategoryPlayAndRecord参数，如果只需要录音，就选择Record就可以了，如果需要录音和播放，则选择PlayAndRecord，这个很重要
if(!ret) {
// NSLog(@"设置声音环境失败");
if([self.delegate respondsToSelector:@selector(AQRecorder:finishWithError:)]) {
[self.delegate AQRecorder:selffinishWithError:error];
}
return;
}
//启用audio session
ret = [[AVAudioSession sharedInstance] setActive:YESerror:&error];
if(!ret) {
// NSLog(@"启动失败");
if([self.delegate respondsToSelector:@selector(AQRecorder:finishWithError:)]) {
[self.delegate AQRecorder:selffinishWithError:error];
}
return;
}
// 初始化 AudioFormat 参数设置
_aqc.mDataFormat.mSampleRate =16000;//采样率
_aqc.mDataFormat.mFormatID = kAudioFormatLinearPCM;//PCM采样
_aqc.mDataFormat.mFramesPerPacket =1;//每个数据包多少帧
_aqc.mDataFormat.mChannelsPerFrame =1;//1单声道，2立体声
//结果分析: 8bit为1byte，即为1个通道里1帧需要采集2byte数据，再*通道数，即为所有通道采集的byte数目。
_aqc.mDataFormat.mBitsPerChannel =16;//在一个数据帧中，每个通道的样本数据的位数。//语音每采样点占用位数
_aqc.mDataFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked;
//所以这里结果赋值给每帧需要采集的byte数目，然后这里的packet也等于一帧的数据。
//每帧的bytes数
_aqc.mDataFormat.mBytesPerFrame = (_aqc.mDataFormat.mBitsPerChannel /8) * _aqc.mDataFormat.mChannelsPerFrame;
//每个数据包的bytes总数
_aqc.mDataFormat.mBytesPerPacket = _aqc.mDataFormat.mBytesPerFrame;
//初始化音频输入队列
AudioQueueNewInput(&_aqc.mDataFormat, AQInputCallback, (__bridgevoid*)(self),NULL,NULL,0, &_aqc.queue);
//估算的缓存区大小
int bufferByteSize =640;
//创建缓冲器
for(inti =0; i < kNumberAudioQueueBuffers; i++) {
OSStatus status = AudioQueueAllocateBuffer(_aqc.queue, bufferByteSize, &_aqc.mBuffers[i]);
if(status != noErr) {
AudioQueueDispose(_aqc.queue,true);
_aqc.queue =NULL;
break;
}
//将 _audioBuffers[i] 添加到队列中
AudioQueueEnqueueBuffer(_aqc.queue, _aqc.mBuffers[i],0,NULL);
}
_aqc.recPtr =0;
_aqc.run =1;
// 开始录音
if(_aqc.queue) {
AudioQueueStart(_aqc.queue,NULL);
// NSLog(@" Recorder-> 开始录音");
}else{
if([self.delegate respondsToSelector:@selector(AQRecorder:finishWithError:)]) {
[self.delegate AQRecorder:self
finishWithError:[NSError errorWithDomain:@" Recorder"
code:-1
userInfo:@{
NSLocalizedDescriptionKey :@"录音初始化错误"
}]];
}
// NSLog(@" Recorder-> 录音初始化错误");
}
}
#pragma mark - 停止录音
- (void)stop {
_aqc.run =0;
AudioQueueStop(_aqc.queue,true);
if([self.delegate respondsToSelector:@selector(AQRecorder:finishWithError:)]) {
NSError *error;
[self.delegate AQRecorder:selffinishWithError:error];
}
}
#pragma mark - Private 实时获取音频数据
- (void)processAudioBuffer:(AudioQueueBufferRef)inBuffer withQueue:(AudioQueueRef)queue {
Byte *data = (Byte *)malloc(inBuffer->mAudioDataByteSize);
memset(data,0, inBuffer->mAudioDataByteSize);
memcpy(data, inBuffer->mAudioData, inBuffer->mAudioDataByteSize);
if(data !=NULL) {
if([self.delegate respondsToSelector:@selector(AQRecorder:didRecivedBuffer:length:)]) {
[self.delegate AQRecorder:selfdidRecivedBuffer:data length:inBuffer->mAudioDataByteSize];
}
}
//调用方法获取音量
NSData *dataBuffer = [[NSData alloc]initWithBytes:data length:inBuffer->mAudioDataByteSize];
[selfisQuite:dataBuffer];
free(data);
}
#pragma mark - 调用方法获取音量
-(BOOL)isQuite:(NSData *)pcmData
{
if(pcmData ==nil)
{
returnNO;
}
longlongpcmAllLenght =0;
shortbutterByte[pcmData.length/2];
memcpy(butterByte, pcmData.bytes, pcmData.length);//frame_size * sizeof(short)
// 将 buffer 内容取出，进行平方和运算
for(inti =0; i < pcmData.length/2; i++)
{
pcmAllLenght += butterByte[i] * butterByte[i];
}
// 平方和除以数据总长度，得到音量大小。
doublemean = pcmAllLenght / (double)pcmData.length;
doublevolume =10*log10(mean);//volume为分贝数大小
if (volume >= 45) //有效返回值 45分贝 --> 70分贝之间
{
if([self.delegate respondsToSelector:@selector(AQCallBackVoiceGrade:)]) {
[self.delegate AQCallBackVoiceGrade:volume];
}
// NSLog(@" -=-=-=--=-=%f分贝",volume);
}
return YES;
}
@end
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