我正在构建一个iOS应用程序。当我要去下一首歌时，我得到了记忆错误。我的代码是
- (void)initializeAUGraph2:(int)songIndex url:(CFURLRef)urlVal
{
printf("initializeAUGraph\n");
AUNode outputNode;
AUNode eqNode;
AUNode mixerNode;
printf("create client ASBD\n");
// client format audio goes into the mixer
mClientFormat.SetCanonical(2, true);
mClientFormat.mSampleRate = kGraphSampleRate;
mClientFormat.Print();
printf("create output ASBD\n");
// output format
mOutputFormat.SetAUCanonical(2, false);
mOutputFormat.mSampleRate = kGraphSampleRate;
mOutputFormat.Print();
OSStatus result = noErr;
// load up the audio data
printf("load up audio data\n");
[self loadFilesWIthUrl:songIndex url:urlVal];
printf("\nnew AUGraph\n");
// create a new AUGraph
result = NewAUGraph(&mGraph);
if (result) { printf("NewAUGraph result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return; }
// create three Audio Component Descriptons for the AUs we want in the graph using the CAComponentDescription helper class
// output unit
CAComponentDescription output_desc(kAudioUnitType_Output, kAudioUnitSubType_RemoteIO, kAudioUnitManufacturer_Apple);
// iPodEQ unit
CAComponentDescription eq_desc(kAudioUnitType_Effect, kAudioUnitSubType_AUiPodEQ, kAudioUnitManufacturer_Apple);
// multichannel mixer unit
CAComponentDescription mixer_desc(kAudioUnitType_Mixer, kAudioUnitSubType_MultiChannelMixer, kAudioUnitManufacturer_Apple);
printf("add nodes\n");
// create a node in the graph that is an AudioUnit, using the supplied AudioComponentDescription to find and open that unit
result = AUGraphAddNode(mGraph, &output_desc, &outputNode);
if (result) { printf("AUGraphNewNode 1 result %lu %4.4s\n", result, (char*)&result); return; }
result = AUGraphAddNode(mGraph, &eq_desc, &eqNode);
if (result) { printf("AUGraphNewNode 2 result %lu %4.4s\n", result, (char*)&result); return; }
result = AUGraphAddNode(mGraph, &mixer_desc, &mixerNode);
if (result) { printf("AUGraphNewNode 3 result %lu %4.4s\n", result, (char*)&result); return; }
// connect a node's output to a node's input
// mixer -> eq -> output
result = AUGraphConnectNodeInput(mGraph, mixerNode, 0, eqNode, 0);
if (result) { printf("AUGraphConnectNodeInput result %lu %4.4s\n", result, (char*)&result); return; }
result = AUGraphConnectNodeInput(mGraph, eqNode, 0, outputNode, 0);
if (result) { printf("AUGraphConnectNodeInput result %lu %4.4s\n", result, (char*)&result); return; }
// open the graph AudioUnits are open but not initialized (no resource allocation occurs here)
result = AUGraphOpen(mGraph);
if (result) { printf("AUGraphOpen result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return; }
// grab the audio unit instances from the nodes
result = AUGraphNodeInfo(mGraph, mixerNode, NULL, &mMixer);
if (result) { printf("AUGraphNodeInfo result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return; }
result = AUGraphNodeInfo(mGraph, eqNode, NULL, &mEQ);
if (result) { printf("AUGraphNodeInfo result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return; }
// set bus count
UInt32 numbuses = 1;
printf("set input bus count %lu\n", numbuses);
result = AudioUnitSetProperty(mMixer, kAudioUnitProperty_ElementCount, kAudioUnitScope_Input, 0, &numbuses, sizeof(numbuses));
if (result) { printf("AudioUnitSetProperty result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return; }
//for (UInt32 i = 0; i < numbuses; ++i) {
// setup render callback struct
AURenderCallbackStruct rcbs;
rcbs.inputProc = &renderInput;
rcbs.inputProcRefCon = &mUserData;
printf("set AUGraphSetNodeInputCallback\n");
// set a callback for the specified node's specified input
result = AUGraphSetNodeInputCallback(mGraph, mixerNode, songIndex, &rcbs);
if (result) { printf("AUGraphSetNodeInputCallback result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return; }
printf("set input bus %d, client kAudioUnitProperty_StreamFormat\n", (unsigned int)songIndex);
// set the input stream format, this is the format of the audio for mixer input
result = AudioUnitSetProperty(mMixer, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, songIndex, &mClientFormat, sizeof(mClientFormat));
if (result) { printf("AudioUnitSetProperty result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return; }
//}
printf("get EQ kAudioUnitProperty_FactoryPresets\n");
// get the eq's factory preset list -- this is a read-only CFArray array of AUPreset structures
// host owns the retuned array and should release it when no longer needed
UInt32 size = sizeof(mEQPresetsArray);
result = AudioUnitGetProperty(mEQ, kAudioUnitProperty_FactoryPresets, kAudioUnitScope_Global, 0, &mEQPresetsArray, &size);
if (result) { printf("AudioUnitGetProperty result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return; }
/* this code can be used if you're interested in dumping out the preset list
printf("iPodEQ Factory Preset List:\n");
UInt8 count = CFArrayGetCount(mEQPresetsArray);
for (int i = 0; i < count; ++i) {
AUPreset *aPreset = (AUPreset*)CFArrayGetValueAtIndex(mEQPresetsArray, i);
CFShow(aPreset->presetName);
}*/
printf("set output kAudioUnitProperty_StreamFormat\n");
// set the output stream format of the mixer
result = AudioUnitSetProperty(mMixer, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 0, &mOutputFormat, sizeof(mOutputFormat));
if (result) { printf("AudioUnitSetProperty result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return; }
printf("set render notification\n");
// add a render notification, this is a callback that the graph will call every time the graph renders
// the callback will be called once before the graph’s render operation, and once after the render operation is complete
result = AUGraphAddRenderNotify(mGraph, renderNotification, &mUserData);
if (result) { printf("AUGraphAddRenderNotify result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return; }
printf("AUGraphInitialize\n");
// now that we've set everything up we can initialize the graph, this will also validate the connections
result = AUGraphInitialize(mGraph);
if (result) { printf("AUGraphInitialize result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return; }
CAShow(mGraph);
}
// load up audio data from the demo files into mSoundBuffer.data used in the render proc
- (void)loadFilesWIthUrl:(int)songIndex url:(CFURLRef)referenceURL
{
mUserData.frameNum = 0;
mUserData.maxNumFrames = 0;
printf("loadFiles, %d\n", songIndex);
ExtAudioFileRef xafref = 0;
// open one of the two source files
OSStatus result = ExtAudioFileOpenURL(referenceURL, &xafref);
if (result || 0 == xafref) { printf("ExtAudioFileOpenURL result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return; }
// get the file data format, this represents the file's actual data format
// for informational purposes only -- the client format set on ExtAudioFile is what we really want back
CAStreamBasicDescription fileFormat;
UInt32 propSize = sizeof(fileFormat);
result = ExtAudioFileGetProperty(xafref, kExtAudioFileProperty_FileDataFormat, &propSize, &fileFormat);
if (result)
{
printf("ExtAudioFileGetProperty kExtAudioFileProperty_FileDataFormat result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return;
}
printf("file %d, native file format\n", songIndex);
fileFormat.Print();
// set the client format to be what we want back
// this is the same format audio we're giving to the the mixer input
result = ExtAudioFileSetProperty(xafref, kExtAudioFileProperty_ClientDataFormat, sizeof(mClientFormat), &mClientFormat);
if (result)
{
printf("ExtAudioFileSetProperty kExtAudioFileProperty_ClientDataFormat %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return;
}
// get the file's length in sample frames
UInt64 numFrames = 0;
propSize = sizeof(numFrames);
result = ExtAudioFileGetProperty(xafref, kExtAudioFileProperty_FileLengthFrames, &propSize, &numFrames);
if (result || numFrames == 0)
{
printf("ExtAudioFileGetProperty kExtAudioFileProperty_FileLengthFrames result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return;
}
memset(&mUserData.soundBuffer, 0, sizeof(mUserData.soundBuffer));
// keep track of the largest number of source frames
if (numFrames > mUserData.maxNumFrames) mUserData.maxNumFrames = numFrames;
// set up our buffer
mUserData.soundBuffer[songIndex].numFrames = numFrames;
mUserData.soundBuffer[songIndex].asbd = mClientFormat;
UInt32 samples = numFrames * mUserData.soundBuffer[songIndex].asbd.mChannelsPerFrame;
mUserData.soundBuffer[songIndex].data = (AudioSampleType *)calloc(samples, sizeof(AudioSampleType));
// set up a AudioBufferList to read data into
AudioBufferList bufList;
bufList.mNumberBuffers = 1;
bufList.mBuffers[0].mNumberChannels = mUserData.soundBuffer[songIndex].asbd.mChannelsPerFrame;
bufList.mBuffers[0].mData = mUserData.soundBuffer[songIndex].data;
bufList.mBuffers[0].mDataByteSize = samples * sizeof(AudioSampleType);
// perform a synchronous sequential read of the audio data out of the file into our allocated data buffer
UInt32 numPackets = numFrames;
result = ExtAudioFileRead(xafref, &numPackets, &bufList);
if(result)
{
//printf("ExtAudioFileRead result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result);
free(mUserData.soundBuffer[songIndex].data);
mUserData.soundBuffer[songIndex].data = 0;
return;
}
// close the file and dispose the ExtAudioFileRef
ExtAudioFileDispose(xafref);
}
-(IBAction)playSong
{
[self stopAUGraph];
[self initializeAUGraph2:0 url:url2];
[self startAUGraph];
}
-(IBAction)nextSong
{
[self stopAUGraph];
[self initializeAUGraph2:0 url:url2];
[self startAUGraph];
}
// stars render
- (void)startAUGraph
{
printf("PLAY\n");
OSStatus result = AUGraphStart(mGraph);
if (result)
{
//printf("AUGraphStart result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return;
}
mIsPlaying = true;
}
// stops render
- (void)stopAUGraph
{
printf("STOP\n");
Boolean isRunning = false;
OSStatus result = AUGraphIsRunning(mGraph, &isRunning);
if (result)
{
//printf("AUGraphIsRunning result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return;
}
if (isRunning)
{
result = AUGraphStop(mGraph);
if (result)
{
//printf("AUGraphStop result %ld %08X %4.4s\n", result, (unsigned int)result, (char*)&result); return;
}
mIsPlaying = false;
}
}
任何一个hlep都可以解决内存问题。请让我知道。任何想法都会感激不尽