static bool Audio_openAndStart(Audio *audio, const char *alias, char *file)
{
UInt32 size;
OSStatus err1;
OSErr err2;
ComponentResult err3;
char *buff;
FSRef path;
AudioStreamBasicDescription format;
ComponentDescription findComp;
Component comp;
AURenderCallbackStruct input;
buff = MMDAgent_pathdup(file);
/* convert file name */
err1 = FSPathMakeRef ((const UInt8 *) buff, &path, NULL);
free(buff);
if(err1) {
return false;
}
/* open audio file */
err1 = ExtAudioFileOpen(&path, &audio->file);
if(err1) {
return false;
}
/* get audio file format */
size = sizeof(AudioStreamBasicDescription);
err1 = ExtAudioFileGetProperty(audio->file, kExtAudioFileProperty_FileDataFormat, &size, &format);
if(err1) {
ExtAudioFileDispose(audio->file);
return false;
}
/* convert audio format to pcm (32bit stereo with the same sampling rate) */
format.mSampleRate = format.mSampleRate;
format.mFormatID = kAudioFormatLinearPCM;
format.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
format.mBytesPerPacket = 4 * 2;
format.mFramesPerPacket = 1;
format.mBytesPerFrame = 4 * 2;
format.mChannelsPerFrame = 2;
format.mBitsPerChannel = 32;
format.mReserved = format.mReserved;
size = sizeof(AudioStreamBasicDescription);
err1 = ExtAudioFileSetProperty(audio->file, kExtAudioFileProperty_ClientDataFormat, size, &format);
if(err1) {
ExtAudioFileDispose(audio->file);
return false;
}
/* open audio device */
findComp.componentType = kAudioUnitType_Output;
findComp.componentSubType = kAudioUnitSubType_DefaultOutput;
findComp.componentManufacturer = kAudioUnitManufacturer_Apple;
findComp.componentFlags = 0;
findComp.componentFlagsMask = 0;
comp = FindNextComponent(NULL, &findComp);
if(comp == 0) {
ExtAudioFileDispose(audio->file);
return false;
}
err2 = OpenAComponent(comp, &audio->device);
if(err2) {
ExtAudioFileDispose(audio->file);
return false;
}
/* set callback func. */
input.inputProc = renderCallback;
input.inputProcRefCon = audio;
size = sizeof(AURenderCallbackStruct);
err3 = AudioUnitSetProperty(audio->device, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &input, size);
if(err3) {
CloseComponent(audio->device);
ExtAudioFileDispose(audio->file);
return false;
}
/* prepare audio device */
err3 = AudioUnitInitialize(audio->device);
if(err3) {
CloseComponent(audio->device);
ExtAudioFileDispose(audio->file);
return false;
}
/* start */
err3 = AudioOutputUnitStart(audio->device);
if(err3) {
AudioUnitUninitialize(audio->device);
CloseComponent(audio->device);
ExtAudioFileDispose(audio->file);
return false;
}
return true;
}
core_audio_sound* CCoreAudioSoundManager::LoadSoundFromFile(const CStdString& fileName)
{
FSRef fileRef;
UInt32 size = 0;
ExtAudioFileRef audioFile;
OSStatus ret = FSPathMakeRef((const UInt8*) fileName.c_str(), &fileRef, false);
ret = ExtAudioFileOpen(&fileRef, &audioFile);
if (ret)
{
CLog::Log(LOGERROR, "CCoreAudioSoundManager::LoadSoundFromFile: Unable to open source file (%s). Error = 0x%08x (%4.4s)", fileName.c_str(), ret, CONVERT_OSSTATUS(ret));
return NULL;
}
core_audio_sound* pSound = new core_audio_sound;
// Retrieve the format of the source file
AudioStreamBasicDescription inputFormat;
size = sizeof(inputFormat);
ret = ExtAudioFileGetProperty(audioFile, kExtAudioFileProperty_FileDataFormat, &size, &inputFormat);
if (ret)
{
CLog::Log(LOGERROR, "CCoreAudioSoundManager::LoadSoundFromFile: Unable to fetch source file format. Error = 0x%08x (%4.4s)", ret, CONVERT_OSSTATUS(ret));
delete pSound;
return NULL;
}
// Set up format conversion. This is the format that will be produced by Read/Write calls.
// Here we use the same format provided to the output AudioUnit
ret = ExtAudioFileSetProperty(audioFile, kExtAudioFileProperty_ClientDataFormat, sizeof(AudioStreamBasicDescription), &m_OutputFormat);
if (ret)
{
CLog::Log(LOGERROR, "CCoreAudioSoundManager::LoadSoundFromFile: Unable to set conversion format. Error = 0x%08x (%4.4s)", ret, CONVERT_OSSTATUS(ret));
delete pSound;
return NULL;
}
// Retrieve the file size (in terms of the file's sample-rate, not the output sample-rate)
UInt64 totalFrames;
size = sizeof(totalFrames);
ret = ExtAudioFileGetProperty(audioFile, kExtAudioFileProperty_FileLengthFrames, &size, &totalFrames);
if (ret)
{
CLog::Log(LOGERROR, "CCoreAudioSoundManager::LoadSoundFromFile: Unable to fetch source file size. Error = 0x%08x (%4.4s)", ret, CONVERT_OSSTATUS(ret));
delete pSound;
return NULL;
}
// Calculate the total number of converted frames to be read
totalFrames *= (float)m_OutputFormat.mSampleRate / (float)inputFormat.mSampleRate; // TODO: Verify the accuracy of this
// Allocate AudioBuffers
UInt32 channelCount = m_OutputFormat.mChannelsPerFrame;
pSound->buffer_list = (AudioBufferList*)calloc(1, sizeof(AudioBufferList) + sizeof(AudioBuffer) * (channelCount - kVariableLengthArray));
pSound->buffer_list->mNumberBuffers = channelCount; // One buffer per channel for deinterlaced pcm
float* buffers = (float*)calloc(1, sizeof(float) * totalFrames * channelCount);
for(int i = 0; i < channelCount; i++)
{
pSound->buffer_list->mBuffers[i].mNumberChannels = 1; // One channel per buffer for deinterlaced pcm
pSound->buffer_list->mBuffers[i].mData = buffers + (totalFrames * i);
pSound->buffer_list->mBuffers[i].mDataByteSize = totalFrames * sizeof(float);
}
// Read the entire file
// TODO: Should we limit the total file length?
UInt32 readFrames = totalFrames;
ret = ExtAudioFileRead(audioFile, &readFrames, pSound->buffer_list);
if (ret)
{
CLog::Log(LOGERROR, "CCoreAudioSoundManager::LoadSoundFromFile: Unable to read from file (%s). Error = 0x%08x (%4.4s)", fileName.c_str(), ret, CONVERT_OSSTATUS(ret));
delete pSound;
return NULL;
}
pSound->total_frames = readFrames; // Store the actual number of frames read from the file. Rounding errors in calcuating the converted number of frames can truncate the read.
// TODO: What do we do with files with more than 2 channels. Currently we just copy the first two and dump the rest.
if (inputFormat.mChannelsPerFrame == 1) // Copy Left channel into Right if the source file is Mono
memcpy(pSound->buffer_list->mBuffers[1].mData, pSound->buffer_list->mBuffers[0].mData, pSound->buffer_list->mBuffers[0].mDataByteSize);
ret = ExtAudioFileDispose(audioFile); // Close the file. We have what we need. Not a lot to be done on failure.
if (ret)
CLog::Log(LOGERROR, "CCoreAudioSoundManager::LoadSoundFromFile: Unable to close file (%s). Error = 0x%08x (%4.4s)", fileName.c_str(), ret, CONVERT_OSSTATUS(ret));
pSound->ref_count = 1; // The caller holds a reference to this object now
pSound->play_count = 0;
return pSound;
}
CoreAudioReadStream::CoreAudioReadStream(string path) :
m_path(path),
m_d(new D)
{
m_channelCount = 0;
m_sampleRate = 0;
if (!QFile(m_path).exists()) {
throw FileNotFound(m_path);
}
QByteArray ba = m_path.toLocal8Bit();
CFURLRef url = CFURLCreateFromFileSystemRepresentation
(kCFAllocatorDefault,
(const UInt8 *)ba.data(),
(CFIndex)ba.length(),
false);
//!!! how do we find out if the file open fails because of DRM protection?
#if (MACOSX_DEPLOYMENT_TARGET <= 1040 && MAC_OS_X_VERSION_MIN_REQUIRED <= 1040)
FSRef fsref;
if (!CFURLGetFSRef(url, &fsref)) { // returns Boolean, not error code
m_error = "CoreAudioReadStream: Error looking up FS ref (file not found?)";
throw FileReadFailed(m_path);
}
m_d->err = ExtAudioFileOpen(&fsref, &m_d->file);
#else
m_d->err = ExtAudioFileOpenURL(url, &m_d->file);
#endif
CFRelease(url);
if (m_d->err) {
m_error = "CoreAudioReadStream: Error opening file: code " + codestr(m_d->err);
throw InvalidFileFormat(path, "failed to open audio file");
}
if (!m_d->file) {
m_error = "CoreAudioReadStream: Failed to open file, but no error reported!";
throw InvalidFileFormat(path, "failed to open audio file");
}
UInt32 propsize = sizeof(AudioStreamBasicDescription);
m_d->err = ExtAudioFileGetProperty
(m_d->file, kExtAudioFileProperty_FileDataFormat, &propsize, &m_d->asbd);
if (m_d->err) {
m_error = "CoreAudioReadStream: Error in getting basic description: code " + codestr(m_d->err);
ExtAudioFileDispose(m_d->file);
throw FileOperationFailed(m_path, "get basic description", codestr(m_d->err));
}
m_channelCount = m_d->asbd.mChannelsPerFrame;
m_sampleRate = m_d->asbd.mSampleRate;
cerr << "CoreAudioReadStream: " << m_channelCount << " channels, " << m_sampleRate << " Hz" << std::endl;
m_d->asbd.mSampleRate = getSampleRate();
m_d->asbd.mFormatID = kAudioFormatLinearPCM;
m_d->asbd.mFormatFlags =
kAudioFormatFlagIsFloat |
kAudioFormatFlagIsPacked |
kAudioFormatFlagsNativeEndian;
m_d->asbd.mBitsPerChannel = sizeof(float) * 8;
m_d->asbd.mBytesPerFrame = sizeof(float) * m_channelCount;
m_d->asbd.mBytesPerPacket = sizeof(float) * m_channelCount;
m_d->asbd.mFramesPerPacket = 1;
m_d->asbd.mReserved = 0;
m_d->err = ExtAudioFileSetProperty
(m_d->file, kExtAudioFileProperty_ClientDataFormat, propsize, &m_d->asbd);
if (m_d->err) {
m_error = "CoreAudioReadStream: Error in setting client format: code " + codestr(m_d->err);
throw FileOperationFailed(m_path, "set client format", codestr(m_d->err));
}
m_d->buffer.mNumberBuffers = 1;
m_d->buffer.mBuffers[0].mNumberChannels = m_channelCount;
m_d->buffer.mBuffers[0].mDataByteSize = 0;
m_d->buffer.mBuffers[0].mData = 0;
}
