音频播放
- 创建 AEAudioController对象
<pre>
self.audioController = [[AEAudioController alloc] initWithAudioDescription:AEAudioStreamBasicDescriptionNonInterleaved16BitStereo inputEnabled:YES];
</pre> - 创建播放器 AEAudioFilePlayer 对象
<pre>
self.bgMusicPlayer = [[AEAudioFilePlayer alloc] initWithURL:[NSURL fileURLWithPath:@""] error:nil];//背景音乐播放器
self.audioPlayer = [[AEAudioFilePlayer alloc] initWithURL:[NSURL fileURLWithPath:@""] error:nil];
</pre>
3.播放
两个声音同时进行混合播放
<pre>
[self.audioController addChannels:@[self.bgMusicPlayer,self.audioPlayer]];
//播放
NSError *error = NULL;
BOOL result = [_audioController start:&error];
if ( !result ) {
NSLog(@"发生错误:%@",error);
}
//暂停播放
[self.audioController stop];
</pre>
调节声音的eq
AEParametricEqFilter
<pre>
AEParametricEqFilter *_eq31HzFilter;
AEParametricEqFilter *_eq62HzFilter;
AEParametricEqFilter *_eq125HzFilter;
AEParametricEqFilter *_eq250HzFilter;
AEParametricEqFilter *_eq500HzFilter;
AEParametricEqFilter *_eq1kFilter;
AEParametricEqFilter *_eq2kFilter;
AEParametricEqFilter *_eq4kFilter;
AEParametricEqFilter *_eq8kFilter;
AEParametricEqFilter *_eq16kFilter;
AEVarispeedFilter *_playbackRateFilter;
</pre>
对各个频率段进行调节
<pre>
[self setupEqFilter:_eq31HzFilter centerFrequency:31 gain:6];
[self setupEqFilter:_eq62HzFilter centerFrequency:62 gain:4];
[self setupEqFilter:_eq125HzFilter centerFrequency:125 gain:0];
[self setupEqFilter:_eq250HzFilter centerFrequency:250 gain:-2];
[self setupEqFilter:_eq500HzFilter centerFrequency:500 gain:-6];
[self setupEqFilter:_eq1kFilter centerFrequency:1000 gain:1];
[self setupEqFilter:_eq2kFilter centerFrequency:2000 gain:4];
[self setupEqFilter:_eq4kFilter centerFrequency:4000 gain:6];
[self setupEqFilter:_eq8kFilter centerFrequency:8000 gain:7];
[self setupEqFilter:_eq16kFilter centerFrequency:16000 gain:9];
</pre>
<pre>
- (void)setupEqFilter:(AEParametricEqFilter *)eqFilter centerFrequency:(double)centerFrequency gain:(double)gain {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
if ( ![_audioController.filters containsObject:eqFilter] ) {
for (AEParametricEqFilter *existEqFilter in _eqFilters) {
if (eqFilter == existEqFilter) {
[self.audioController addFilter:eqFilter];
break;
}
}
}
eqFilter.centerFrequency = centerFrequency;
eqFilter.qFactor = 1.0;
eqFilter.gain = gain;
});
}
</pre>
保存调节后的声音
<pre>
-
(BOOL)writeFilesNew:(NSArray *)urlsWithSettings controller:(AEAudioController *)audioController options:(NSArray *)options targetFile:(NSString *)targetPath
{
// NSMutableArray * optionsNew = [NSMutableArray new];
if(options)
{
for (AEAudioUnitFilter * filter in options) {
if(![audioController.filters containsObject:filter])
{
if([filter isKindOfClass:[AEAudioUnitFilter class]] )
{
[audioController addFilter:filter];
}
}
}
}
NSTimeInterval duration = 0;
NSArray * channels = [self getChannelsForUrls:urlsWithSettings longestPlayer:nil duration:&duration];
BOOL ret = [self renderOffline:channels duration:duration targetFile:targetPath];
for (AEAudioUnitChannel * item in channels) {
[item teardown];
}
channels = nil;return ret;
}
-
(BOOL)renderOffline:(NSArray *)channels duration:(NSTimeInterval)duration targetFile:(NSString *)targetPath
{
const int kBufferLength = 4096;Boolean outIsOpen = NO;
NSError * error = nil;[_audioController start:nil];
AUGraphStop(_audioController.audioGraph);
AUGraphIsOpen(_audioController.audioGraph, &outIsOpen);
printf("AUGraph is open:%d\n",outIsOpen);
[_audioController addChannels:channels];
NSTimeInterval renderDuration = duration;
Float64 sampleRate = _audioController.audioDescription.mSampleRate;
UInt32 lengthInFrames = (UInt32) (renderDuration * sampleRate);AudioTimeStamp timeStamp;
memset (&timeStamp, 0, sizeof(timeStamp));
timeStamp.mSampleTime = 0;
timeStamp.mFlags = kAudioTimeStampSampleTimeValid;AEAudioFileWriter *audioFileWriter = [[AEAudioFileWriter alloc] initWithAudioDescription:_audioController.audioDescription];
AudioBufferList *buf = AEAllocateAndInitAudioBufferList(_audioController.audioDescription, kBufferLength);
//printf("begin to write file:%s",targetPath);
error = nil;
[audioFileWriter beginWritingToFileAtPath:targetPath fileType:kAudioFileM4AType error:&error];
if(error)
{
// char * test = [error localizedDescription].UTF8String;
printf("file writer error:%s",[error localizedDescription].UTF8String);
// NSLog(@"file writer error:%@",[error localizedDescription]);
}
for (UInt64 i = 0; i < lengthInFrames; i += kBufferLength) {
// printf("**begin render:%f \n",timeStamp.mSampleTime);
AEAudioControllerRenderMainOutput(_audioController, timeStamp, kBufferLength, buf);int temp = buf->mBuffers[0].mDataByteSize / _audioController.audioDescription.mBytesPerFrame; if(temp==0) { printf("buffer length 0,break\n"); break; } timeStamp.mSampleTime += kBufferLength; // printf("**begin write %llu length:%d in %u...\n",i,kBufferLength,(unsigned int)lengthInFrames); OSStatus status = AEAudioFileWriterAddAudioSynchronously(audioFileWriter, buf, kBufferLength); // OSStatus status = AEAudioFileWriterAddAudio(audioFileWriter, buf, kBufferLength); if (status != noErr) { printf("ERROR\n"); } else printf("ok \n");
}
[audioFileWriter finishWriting];
AEFreeAudioBufferList(buf);// PP_RELEASE(audioFileWriter);
AUGraphStart(_audioController.audioGraph);
[_audioController removeChannels:channels];
[_audioController stop];
printf("Finished\n");
NSMutableDictionary *dict = [self.recordList[0] mutableCopy];
dict[@"audioPath"] = targetPath;
[self.recordList removeAllObjects];
[self.recordList addObject:dict];
[self mixBackMusic];
return YES;
}
pragma mark - ae
-
(NSArray *)getChannelsForUrls:(NSArray *)urlsWithSettings longestPlayer:(AEAudioFilePlayer **)longestPlayer duration:(NSTimeInterval *)durationTotal
{
NSMutableArray * channels = [NSMutableArray new];
NSTimeInterval longestTime = 0;
if(!urlsWithSettings) return channels;for (NSDictionary * item in urlsWithSettings) {
NSError * error = nil;
NSURL * url = [item objectForKey:@"url"];
CGFloat startSeconds = 0;
CGFloat duration = 0;
if([item objectForKey:@"start"])
startSeconds = [[item objectForKey:@"start"]floatValue];
if(startSeconds <0) startSeconds = 0;CGFloat vol = 1; if([item objectForKey:@"vol"]) vol = [[item objectForKey:@"vol"]floatValue]; if([item objectForKey:@"duration"]) { duration = [[item objectForKey:@"duration"]floatValue]; } AEAudioFilePlayer *aePlayer = [[AEAudioFilePlayer alloc] initWithURL:url error:&error]; if(error) { NSLog(@"load player failure:%@",[error localizedDescription]); continue; } aePlayer.volume = vol; // aePlayer.loop = YES; if(startSeconds>0) { [aePlayer setRegionStartTime:startSeconds]; } else startSeconds = 0; //计算播放时长 if(duration>0) { if(duration < aePlayer.duration - startSeconds) { [aePlayer setRegionDuration:duration]; } else { duration = aePlayer.duration - startSeconds; } } else duration = aePlayer.duration - startSeconds; if(longestTime < duration) { longestTime = duration; if(longestPlayer) { *longestPlayer = aePlayer; } } [channels addObject:aePlayer];
}
if(durationTotal)
{
*durationTotal = longestTime;
}
return channels;
}
</pre>
调节 TheAmazingAudioEngine中有很多可以调节很多音效
<pre>
AEDelayFilter
AEDistortionFilter
AEDynamicsProcessorFilter
AEExpanderFilter
AEHighPassFilter
AEHighShelfFilter
AELimiterFilter
AELowPassFilter
AELowShelfFilter
AENewTimePitchFilter
AEPeakLimiterFilter
AEParametricEqFilter
AEReverbFilter
AEVarispeedFilter
</pre>
等等等等 调节方法和eq类似。。。
希望能帮到你。
网友评论