iOS使用音频处理框架The Amazing Audio Engine实现音频录制播放

ios 第三方音频框架the amazing audio engine使用，实现音频录制、播放，可设置配乐。

首先看一下效果图：

下面贴上核心控制器代码：

#import "viewcontroller.h"
#import <avfoundation/avfoundation.h>
#import "hwprogresshud.h"
#import "uiimage+hw.h"
#import "aerecorder.h"
#import "hwrecordingdrawview.h"

#define kmainw [uiscreen mainscreen].bounds.size.width
#define kmainh [uiscreen mainscreen].bounds.size.height

@interface viewcontroller ()

@property (nonatomic, strong) aerecorder *recorder;
@property (nonatomic, strong) aeaudiocontroller *audiocontroller;
@property (nonatomic, strong) aeaudiofileplayer *player;
@property (nonatomic, strong) aeaudiofileplayer *backgroundplayer;
@property (nonatomic, strong) nstimer *timer;
@property (nonatomic, strong) nsmutablearray *soundsource;
@property (nonatomic, weak) hwrecordingdrawview *recordingdrawview;
@property (nonatomic, weak) uilabel *reclabel;
@property (nonatomic, weak) uilabel *recordtimelabel;
@property (nonatomic, weak) uilabel *playtimelabel;
@property (nonatomic, weak) uibutton *auditionbtn;
@property (nonatomic, weak) uibutton *recordbtn;
@property (nonatomic, weak) uislider *slider;
@property (nonatomic, copy) nsstring *path;

@end

@implementation viewcontroller

- (aeaudiocontroller *)audiocontroller
{
 if (!_audiocontroller) {
 _audiocontroller = [[aeaudiocontroller alloc] initwithaudiodescription:[aeaudiocontroller noninterleavedfloatstereoaudiodescription] inputenabled:yes];
 _audiocontroller.preferredbufferduration = 0.005;
 _audiocontroller.usemeasurementmode = yes;
 }

 return _audiocontroller;
}

- (nsmutablearray *)soundsource
{
 if (!_soundsource) {
 _soundsource = [nsmutablearray array];
 }

 return _soundsource;
}

- (void)viewdidload {
 [super viewdidload];

 [self creatcontrol];
}

- (void)creatcontrol
{
 cgfloat marginx = 30.0f;

 //音频视图
 hwrecordingdrawview *recordingdrawview = [[hwrecordingdrawview alloc] initwithframe:cgrectmake(marginx, 80, kmainw - marginx * 2, 100)];
 [self.view addsubview:recordingdrawview];
 _recordingdrawview = recordingdrawview;

 //rec
 uilabel *reclabel = [[uilabel alloc] initwithframe:cgrectmake(marginx, cgrectgetmaxy(recordingdrawview.frame) + 20, 80, 40)];
 reclabel.text = @"rec";
 reclabel.textcolor = [uicolor redcolor];
 [self.view addsubview:reclabel];
 _reclabel = reclabel;

 //录制时间
 uilabel *recordtimelabel = [[uilabel alloc] initwithframe:cgrectmake(cgrectgetmaxx(reclabel.frame) + 20, cgrectgetminy(reclabel.frame), 150, 40)];
 recordtimelabel.text = @"录制时长：00:00";
 [self.view addsubview:recordtimelabel];
 _recordtimelabel = recordtimelabel;

 //播放时间
 uilabel *playtimelabel = [[uilabel alloc] initwithframe:cgrectmake(cgrectgetminx(recordtimelabel.frame), cgrectgetmaxy(recordtimelabel.frame), 150, 40)];
 playtimelabel.text = @"播放时长：00:00";
 playtimelabel.hidden = yes;
 [self.view addsubview:playtimelabel];
 _playtimelabel = playtimelabel;

 //配乐按钮
 nsarray *titlearray = @[@"无配乐", @"夏天", @"阳光海湾"];
 cgfloat btnw = 80.0f;
 cgfloat padding = (kmainw - marginx * 2 - btnw * titlearray.count) / (titlearray.count - 1);
 for (int i = 0; i < titlearray.count; i++) {
 cgfloat btnx = marginx + (btnw + padding) * i;
 uibutton *btn = [[uibutton alloc] initwithframe:cgrectmake(btnx, cgrectgetmaxy(playtimelabel.frame) + 20, btnw, btnw)];
 [btn settitle:titlearray[i] forstate:uicontrolstatenormal];
 btn.layer.cornerradius = btnw * 0.5;
 btn.layer.maskstobounds = yes;
 [btn setbackgroundimage:[uiimage imagewithcolor:[uicolor graycolor]] forstate:uicontrolstatenormal];
 [btn setbackgroundimage:[uiimage imagewithcolor:[uicolor orangecolor]] forstate:uicontrolstateselected];
 if (i == 0) btn.selected = yes;
 btn.tag = 100 + i;
 [btn addtarget:self action:@selector(changebackgroundmusic:) forcontrolevents:uicontroleventtouchupinside];
 [self.view addsubview:btn];
 }

 //配乐音量
 uilabel *backgroundlabel = [[uilabel alloc] initwithframe:cgrectmake(marginx + 10, cgrectgetmaxy(playtimelabel.frame) + 120, 80, 40)];
 backgroundlabel.text = @"配乐音量";
 [self.view addsubview:backgroundlabel];

 //配乐音量
 uislider *slider = [[uislider alloc] initwithframe:cgrectmake(cgrectgetmaxx(backgroundlabel.frame) + 10, cgrectgetminy(backgroundlabel.frame), 210, 40)];
 slider.value = 0.4f;
 [slider addtarget:self action:@selector(slidervaluechanged:) forcontrolevents:uicontroleventvaluechanged];
 [self.view addsubview:slider];
 _slider = slider;

 //试听按钮
 uibutton *auditionbtn = [[uibutton alloc] initwithframe:cgrectmake(marginx, kmainh - 150, 120, 80)];
 auditionbtn.hidden = yes;
 auditionbtn.backgroundcolor = [uicolor blackcolor];
 [auditionbtn settitle:@"试听" forstate:uicontrolstatenormal];
 [auditionbtn settitle:@"停止" forstate:uicontrolstateselected];
 [auditionbtn addtarget:self action:@selector(auditionbtnonclick:) forcontrolevents:uicontroleventtouchupinside];
 [self.view addsubview:auditionbtn];
 _auditionbtn = auditionbtn;

 //录音按钮
 uibutton *recordbtn = [[uibutton alloc] initwithframe:cgrectmake(kmainw - marginx - 120, kmainh - 150, 120, 80)];
 recordbtn.backgroundcolor = [uicolor blackcolor];
 [recordbtn settitle:@"开始" forstate:uicontrolstatenormal];
 [recordbtn settitle:@"暂停" forstate:uicontrolstateselected];
 [recordbtn addtarget:self action:@selector(recordbtnonclick:) forcontrolevents:uicontroleventtouchupinside];
 [self.view addsubview:recordbtn];
 _recordbtn = recordbtn;
}

//配乐按钮点击事件
- (void)changebackgroundmusic:(uibutton *)btn
{
 //更新选中状态
 for (int i = 0; i < 3; i++) {
 uibutton *button = (uibutton *)[self.view viewwithtag:100 + i];
 button.selected = no;
 }
 btn.selected = yes;

 //移除之前配乐
 if (_backgroundplayer) {
 [_audiocontroller removechannels:@[_backgroundplayer]];
 _backgroundplayer = nil;
 }

 nsurl *url;
 if (btn.tag == 100) {
 return;
 }else if (btn.tag == 101) {
 url = [[nsbundle mainbundle]urlforresource:@"夏天.mp3" withextension:nil];
 }else if (btn.tag == 102) {
 url = [[nsbundle mainbundle]urlforresource:@"阳光海湾.mp3" withextension:nil];
 }
 [self.audiocontroller start:null];

 nserror *averror = null;
 _backgroundplayer = [aeaudiofileplayer audiofileplayerwithurl:url error:&averror];
 _backgroundplayer.volume = _slider.value;
 _backgroundplayer.loop = yes;
 if (!_backgroundplayer) {
 [[[uialertview alloc] initwithtitle:@"error"
     message:[nsstring stringwithformat:@"couldn't start playback: %@", [averror localizeddescription]]
     delegate:nil
    cancelbuttontitle:nil
    otherbuttontitles:@"ok", nil] show];
 return;
 }

 //放完移除
 _backgroundplayer.removeuponfinish = yes;
 __weak viewcontroller *weakself = self;
 _backgroundplayer.completionblock = ^{
 weakself.backgroundplayer = nil;
 };
 [_audiocontroller addchannels:@[_backgroundplayer]];
}

//配乐音量slider滑动事件
- (void)slidervaluechanged:(uislider *)slider
{
 if (_backgroundplayer) _backgroundplayer.volume = slider.value;
}

//录音按钮点击事件
- (void)recordbtnonclick:(uibutton *)btn
{
 [[avaudiosession sharedinstance] requestrecordpermission:^(bool granted) {
 if (granted) {
  //用户同意获取麦克风
  dispatch_after(dispatch_time(dispatch_time_now, (int64_t)(.1f * nsec_per_sec)), dispatch_get_main_queue(), ^{
  btn.selected = !btn.selected;

  if (btn.selected) {
   [self startrecord];
  }else {
   [self finishrecord];
  }
  });

 }else {
  //用户不同意获取麦克风
  [hwprogresshud showmessage:@"需要访问您的麦克风，请在“设置-隐私-麦克风”中允许访问。" duration:3.f];
 }
 }];
}

//开始录音
- (void)startrecord
{
 _auditionbtn.hidden = yes;
 [self.audiocontroller start:null];
 _recorder = [[aerecorder alloc] initwithaudiocontroller:_audiocontroller];
 _path = [self getpath];

 nserror *error = null;
 if ( ![_recorder beginrecordingtofileatpath:_path filetype:kaudiofilem4atype error:&error] ) {
 [[[uialertview alloc] initwithtitle:@"error" message:[nsstring stringwithformat:@"couldn't start recording: %@", [error localizeddescription]] delegate:nil cancelbuttontitle:nil otherbuttontitles:@"ok", nil] show];
 _recorder = nil;
 return;
 }

 [self.soundsource removeallobjects];
 [self removetimer];
 [self addrecordtimer];

 [_audiocontroller addoutputreceiver:_recorder];
 [_audiocontroller addinputreceiver:_recorder];
}

//结束录音
- (void)finishrecord
{
 _auditionbtn.hidden = no;
 _reclabel.hidden = no;
 [self removetimer];

 [_recorder finishrecording];
 [_audiocontroller removeoutputreceiver:_recorder];
 [_audiocontroller removeinputreceiver:_recorder];
 _recorder = nil;
}

//添加录音定时器
- (void)addrecordtimer
{
 self.timer = [nstimer scheduledtimerwithtimeinterval:.2f target:self selector:@selector(recordtimeraction) userinfo:nil repeats:yes];
 [[nsrunloop mainrunloop] addtimer:self.timer formode:nsrunloopcommonmodes];
}

//录音定时器事件
- (void)recordtimeraction
{
 //获取音频
 [catransaction begin];
 [catransaction setdisableactions:yes];
 float32 inputavg, inputpeak, outputavg, outputpeak;
 [_audiocontroller inputaveragepowerlevel:&inputavg peakholdlevel:&inputpeak];
 [_audiocontroller outputaveragepowerlevel:&outputavg peakholdlevel:&outputpeak];
 [self.soundsource insertobject:[nsnumber numberwithfloat:(inputpeak + 18) * 2.8] atindex:0];
 [catransaction commit];
 _recordingdrawview.pointarray = _soundsource;

 //rec闪动
 _reclabel.hidden = (int)[self.recorder currenttime] % 2 == 1 ? yes : no;

 //录音时间
 nsstring *str = [self strwithtime:[self.recorder currenttime] interval:0.5f];
 if ([str intvalue] < 0) str = @"录制时长：00:00";
 [self.recordtimelabel settext:[nsstring stringwithformat:@"录制时长：%@", str]];
}

//移除定时器
- (void)removetimer
{
 [self.timer invalidate];
 self.timer = nil;
}

//试听按钮点击事件
- (void)auditionbtnonclick:(uibutton *)btn
{
 btn.selected = !btn.selected;

 if (btn.selected) {
 [self playrecord];
 }else {
 [self stopplayrecord];
 }
}

//播放录音
- (void)playrecord
{
 //更新界面
 _recordbtn.hidden = yes;
 [_playtimelabel settext:@"播放时长：00:00"];
 _playtimelabel.hidden = no;

 //取消背景音乐
 [self changebackgroundmusic:(uibutton *)[self.view viewwithtag:100]];

 if (![[nsfilemanager defaultmanager] fileexistsatpath:_path]) return;

 nserror *error = nil;
 _player = [aeaudiofileplayer audiofileplayerwithurl:[nsurl fileurlwithpath:_path] error:&error];
 if (!_player) {
 [[[uialertview alloc] initwithtitle:@"error"
     message:[nsstring stringwithformat:@"couldn't start playback: %@", [error localizeddescription]]
     delegate:nil
    cancelbuttontitle:nil
    otherbuttontitles:@"ok", nil] show];
 return;
 }

 [self addplaytimer];
 _player.removeuponfinish = yes;

 __weak viewcontroller *weakself = self;
 _player.completionblock = ^{
 weakself.player = nil;
 weakself.auditionbtn.selected = no;
 [weakself stopplayrecord];
 };
 [self.audiocontroller start:null];
 [self.audiocontroller addchannels:@[_player]];
}

//停止播放录音
- (void)stopplayrecord
{
 _recordbtn.hidden = no;
 _playtimelabel.hidden = yes;
 [self removetimer];
 if (_player) [_audiocontroller removechannels:@[_player]];
}

//添加播放定时器
- (void)addplaytimer
{
 self.timer = [nstimer scheduledtimerwithtimeinterval:1.0f target:self selector:@selector(playtimeraction) userinfo:nil repeats:yes];
 [[nsrunloop mainrunloop] addtimer:self.timer formode:nsrunloopcommonmodes];
}

//播放定时器事件
- (void)playtimeraction
{
 //播放时间
 nsstring *str = [self strwithtime:[_player currenttime] interval:1.f];
 if ([str intvalue] < 0) str = @"播放时长：00:00";
 [_playtimelabel settext:[nsstring stringwithformat:@"播放时长：%@", str]];
}

//录制音频沙盒路径
- (nsstring *)getpath
{
 nsdateformatter *formatter = [[nsdateformatter alloc] init];
 [formatter setdateformat:@"yyyymmddhhmmss"];
 nsstring *recordname = [nsstring stringwithformat:@"%@.wav", [formatter stringfromdate:[nsdate date]]];
 nsstring *path = [[nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes) lastobject] stringbyappendingpathcomponent:recordname];

 return path;
}

//时长长度转时间字符串
- (nsstring *)strwithtime:(double)time interval:(cgfloat)interval
{
 int minute = (time * interval) / 60;
 int second = (int)(time * interval) % 60;

 return [nsstring stringwithformat:@"%02d:%02d", minute, second];
}

@end

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。

原文链接：https://blog.csdn.net/hero_wqb/article/details/76460663