// .h 文件
#import <Foundation/Foundation.h>
#import <AudioToolbox/AudioToolbox.h>
NS_ASSUME_NONNULL_BEGIN
@protocol PCMPlayerDelegate <NSObject>
/// 准备好了，可以开始播放了，回调
- (void)readlyToPlay;
/// 播放完成回调
- (void)playFinished;
/// 播放暂停回调
- (void)playPausedIfNeed;
/// 播放开始回调
- (void)playResumeIfNeed;
///更新buffer的位置回调
- (void)updateBufferPositon:(float)bufferPosition;
/// 播放错误的回调
- (void)playerCallBackFaiure:(NSString *)errorStr;
@end
@interface PCMPlayer : NSObject
/// 当前的播放进度
@property(nonatomic,assign)NSInteger currentPlayPosition;
/// 音频长度
@property(nonatomic,assign)NSInteger audioLength;
@property(nonatomic,weak)id <PCMPlayerDelegate> delegate;
/// 当前的播放状态
@property(nonatomic,assign,getter=isPlayerPlaying)BOOL playerPlaying;
/// 是否准备好开始播放
@property(nonatomic,assign,getter=isReadyToPlay)BOOL readyToPlay;
/// 是否缓存完成
@property(nonatomic,assign,getter=isFinished)BOOL finished;
/// 初始化sdk
/// @param audioType 传入audioType
- (instancetype)initWithType:(NSString *)audioType;
/// 开始播放
- (void)startPlay;
/// 暂停播放
- (void)pausePlay;
// 恢复播放
- (void)resumePlay;
/// 停止播放
- (void)stopPlay;
///回调当次buffer的数据
/// @param data 当次buffer获取到的数据
/// @param length 数据的总长度
- (void)appendData:(NSData *)data totalDatalength:(float)length endFlag:(BOOL)endflag;
@end
NS_ASSUME_NONNULL_END
.m文件
//
//
#import "PCMPlayer.h"
#import <AVFoundation/AVFoundation.h>
#define QUEUE_BUFFER_SIZE 3 //缓冲器个数
#define SAMPLE_RATE_16K 16000 //采样频率
#define SAMPLE_RATE_8K 8000 //采样频率
@interface PCMPlayer() {
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;
OSStatus osState;
unsigned int temPaket; //切割的数据包的大小
}
/// 播放数据源
@property(nonatomic,strong,nullable)NSMutableArray * dataArray;
/// 播放进度单位为s
@property(nonatomic,assign)NSInteger playPosition;
/// 播放的过程中因为数据不足而暂停
@property(nonatomic,assign,getter=isPausePlayIfNeed)BOOL pausePlayIfNeed;
@end
@implementation PCMPlayer
- (instancetype)initWithType:(NSString *)audioType {
if (self = [super init]) {
sysnLock = [[NSLock alloc]init];
//设置音频参数 具体的信息需要问后台
if ([audioType isEqualToString:@"8k"]) {
_audioDescription.mSampleRate = SAMPLE_RATE_8K;
temPaket = 1600;
}else {
_audioDescription.mSampleRate = SAMPLE_RATE_16K;
temPaket = 3200;
}
_audioDescription.mFormatID = kAudioFormatLinearPCM;
// 下面这个是保存音频数据的方式的说明，如可以根据大端字节序或小端字节序，浮点数或整数以及不同体位去保存数据
_audioDescription.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
//1单声道 2双声道
_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);
AVAudioSession *session = [AVAudioSession sharedInstance];
// [session setActive:YES error:nil];
// [session setCategory:AVAudioSessionCategoryPlayback error:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(AVAudioSessionInterruptionNotification:) name:AVAudioSessionInterruptionNotification object:session];
// 设置音量
AudioQueueSetParameter(audioQueue, kAudioQueueParam_Volume, 1.0);
// 初始化需要的缓冲区
[self initPlayBuffer];
_playPosition = 0;
_playerPlaying = NO;
_readyToPlay = NO;
_pausePlayIfNeed = NO;
}
return self;
}
// MARK: 播放逻辑控制
- (void)initPlayBuffer {
for (int i = 0; i < QUEUE_BUFFER_SIZE; i++) {
audioQueueBufferUsed[i] = false;
osState = AudioQueueAllocateBuffer(audioQueue, temPaket, &audioQueueBuffers[i]);
}
}
- (void)startPlay {
[self startPlayNeedCallBack:YES];
}
- (void)pausePlay {
[self pausePlayNeedCallBack:YES];
}
- (void)resumePlay {
[self resumePlayNeedCallBack:YES];
}
- (void)stopPlay {
osState = AudioQueueStop(audioQueue, YES);
if (osState != noErr) {
[self callBackPlayerFailureMessage:@"AudioQueueStop Error"];
return ;
}
self.playerPlaying = NO;
_readyToPlay = NO;
[self callBackIsPlaying:self.isPlayerPlaying];
}
- (void)startPlayNeedCallBack:(BOOL)needCallBack {
osState = AudioQueueStart(audioQueue, NULL);
if (osState != noErr) {
[self callBackPlayerFailureMessage:@"AudioQueueStart Error"];
return;
}
self.playerPlaying = YES;
if (needCallBack) {
[self callBackIsPlaying:self.isPlayerPlaying];
}
}
- (void)pausePlayNeedCallBack:(BOOL)needCallBack {
osState = AudioQueuePause(audioQueue);
if (osState != noErr) {
[self callBackPlayerFailureMessage:@"AudioQueuePause Error"];
return ;
}
self.playerPlaying = NO;
if (needCallBack) {
[self callBackIsPlaying:self.isPlayerPlaying];
}
}
- (void)resumePlayNeedCallBack:(BOOL)needCallBack {
osState = AudioQueueStart(audioQueue, NULL);
if (osState != noErr) {
[self callBackPlayerFailureMessage:@"AudioQueueStart (resume) Error"];
return ;
}
self.playerPlaying = YES;
if (needCallBack) {
[self callBackIsPlaying:self.isPlayerPlaying];
}
}
- (void)callBackIsPlaying:(BOOL)isPlaying {
if (isPlaying) {
if (self.delegate && [self.delegate respondsToSelector:@selector(playResumeIfNeed)]) {
[self.delegate playResumeIfNeed];
}
}else {
if (self.delegate && [self.delegate respondsToSelector:@selector(playPausedIfNeed)]) {
[self.delegate playPausedIfNeed];
}
}
}
- (void)appendData:(NSData *)data totalDatalength:(float)length endFlag:(BOOL)endflag {
NSArray *dataArray = [self arrayWithPcmData:data];
[self.dataArray addObjectsFromArray:dataArray];
self.finished = endflag;
// 更新音频数据的总长度
if (endflag) {
self.audioLength = self.dataArray.count *0.1;
}else {
self.audioLength = length*0.26;
}
// 回调音频数据的buffer长度
if (self.delegate && [self.delegate respondsToSelector:@selector(updateBufferPositon:)]) {
if (endflag) {
[self.delegate updateBufferPositon:1.0];
}else {
float progress = self.dataArray.count *0.1/(length*0.26);
if (progress >= 1) {
progress = 1;
}
[self.delegate updateBufferPositon:progress];
}
}
// 中断后继续播放
if (self.isPausePlayIfNeed) {
[self startPlayNeedCallBack:NO];
self.pausePlayIfNeed = NO;
}
// 准备播放
if (self.dataArray.count > QUEUE_BUFFER_SIZE && self.readyToPlay == NO) {
self.readyToPlay = YES;
[self enqueueTheBuffer];
if (self.delegate && [self.delegate respondsToSelector:@selector(readlyToPlay)]) {
[self.delegate readlyToPlay];
}
}
}
// 把数据按照指定的长度切割成指定的长度
- (NSArray *)arrayWithPcmData:(NSData *)data {
NSMutableArray *tempDataArray = [NSMutableArray array];
NSInteger count= data.length/temPaket + 1;
for (int i = 0; i < count; i++) {
NSData *subData ;
if (i ==count-1) {
subData =[data subdataWithRange:NSMakeRange(i*temPaket, data.length-i*temPaket)];
}else {
subData = [data subdataWithRange:NSMakeRange(i*temPaket, temPaket)];
}
// mark: 如果切割的数据为空，不要添加到buffer中来
if (subData.length<=0) {
continue;
}
[tempDataArray addObject:subData];
}
return tempDataArray;
}
- (void)enqueueTheBuffer {
for (int i = 0; i < QUEUE_BUFFER_SIZE; i++) {
if (!audioQueueBufferUsed[i]) {
[self dataEnqueTheAudioBufferIndex:i];
}
}
}
- (void)dataEnqueTheAudioBufferIndex:(NSInteger)bufferIndex {
[sysnLock lock];
audioQueueBufferUsed[bufferIndex] = false;
NSData * tempData;
if(self.dataArray.count <= _playPosition) {
Byte *bytes = (Byte*)malloc(temPaket);
tempData = [NSData dataWithBytes:bytes length:temPaket];
}else {
tempData = self.dataArray[_playPosition];
}
NSUInteger len = tempData.length;
Byte *bytes = (Byte*)malloc(len);
[tempData getBytes:bytes length:len];
audioQueueBuffers[bufferIndex] -> mAudioDataByteSize = (unsigned int)len;
// 把bytes的头地址开始的len字节给mAudioData
memcpy(audioQueueBuffers[bufferIndex] -> mAudioData, bytes, len);
if (bytes) {
free(bytes);
}
_playPosition++;
audioQueueBufferUsed[bufferIndex] = true;
AudioQueueEnqueueBuffer(audioQueue, audioQueueBuffers[bufferIndex], 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) {
PCMPlayer* player = (__bridge PCMPlayer*)inUserData;
[player resetBufferState:audioQueueRef and:audioQueueBufferRef];
}
- (void)resetBufferState:(AudioQueueRef)audioQueueRef and:(AudioQueueBufferRef)audioQueueBufferRef {
// 当数据超过播放长度时回调
if (self.dataArray.count == _playPosition) {
if (self.isFinished) {
self.pausePlayIfNeed = NO;
[self callBackPlayStatePauseOrResume];
}else {
self.pausePlayIfNeed = YES;
}
[self pausePlayNeedCallBack:NO];
}
// 将这个buffer设为未使用
for (int i = 0; i < QUEUE_BUFFER_SIZE; i++) {
if (audioQueueBufferRef == audioQueueBuffers[i]) {
// 追加buffer数据
[self dataEnqueTheAudioBufferIndex:i];
}
}
}
- (void)callBackPlayStatePauseOrResume {
// 播放长度不够的控制
dispatch_async(dispatch_get_main_queue(), ^{
if (self.isFinished) {
if (self.delegate && [self.delegate respondsToSelector:@selector(playFinished)]) {
[self.delegate playFinished];
}
}else {
if (self.delegate && [self.delegate respondsToSelector:@selector(playPausedIfNeed)]) {
[self.delegate playPausedIfNeed];
}
}
});
}
// ************************** 内存回收 **********************************
- (void)dealloc {
if (audioQueue != nil) {
AudioQueueStop(audioQueue,true);
}
audioQueue = nil;
sysnLock = nil;
}
//MARK:----接收通知方法----------
- (void)AVAudioSessionInterruptionNotification: (NSNotification *)notificaiton {
// NSLog(@"%@", notificaiton.userInfo);
AVAudioSessionInterruptionType type = [notificaiton.userInfo[AVAudioSessionInterruptionTypeKey] intValue];
static BOOL isLastPlayStatePlaying = NO;
if (type == AVAudioSessionInterruptionTypeBegan) {
if (self.isPlayerPlaying) {
isLastPlayStatePlaying = YES;
}else {
isLastPlayStatePlaying = NO;
}
}else if (type == AVAudioSessionInterruptionTypeEnded && isLastPlayStatePlaying){
[self startPlayNeedCallBack:NO];
}
}
- (void)callBackPlayerFailureMessage:(NSString *)message {
if (self.delegate && [self.delegate respondsToSelector:@selector(playerCallBackFaiure:)]) {
[self.delegate playerCallBackFaiure:message];
}
}
// MARK: - custom Accessor -
- (NSInteger)currentPlayPosition {
return self.playPosition/10;
}
- (NSMutableArray *)dataArray {
if (!_dataArray) {
_dataArray = [NSMutableArray array];
}
return _dataArray;
}
@end
使用方法
- 初始化
self.pcmPlayer = [[IFlyPCMPlayer alloc] initWithType:@"16"];
self.pcmPlayer.delegate = self;
2.添加pcm音频数据
[self.pcmPlayer appendData:audioData totalDatalength:audioData.length endFlag:NO];
3.播放
在 - (void)readlyToPlay { } 回调中 调用 [self.pcmPlayer startPlay]
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