static Boolean MyFileFormatRequiresBigEndian(AudioFileTypeID audioFileType, int bitdepth)
{
AudioFileTypeAndFormatID ftf;
UInt32 propertySize;
OSStatus err;
Boolean requiresBigEndian;
ftf.mFileType = audioFileType;
ftf.mFormatID = kAudioFormatLinearPCM;
err = AudioFileGetGlobalInfoSize(kAudioFileGlobalInfo_AvailableStreamDescriptionsForFormat, sizeof(ftf), &ftf, &propertySize);
if (err) return FALSE;
AudioStreamBasicDescription *formats = (AudioStreamBasicDescription *)malloc(propertySize);
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_AvailableStreamDescriptionsForFormat, sizeof(ftf), &ftf, &propertySize, formats);
requiresBigEndian = TRUE;
if (err == noErr) {
int i, nFormats = propertySize / sizeof(AudioStreamBasicDescription);
for (i = 0; i < nFormats; ++i) {
if (formats[i].mBitsPerChannel == bitdepth
&& !(formats[i].mFormatFlags & kLinearPCMFormatFlagIsBigEndian)) {
requiresBigEndian = FALSE;
break;
}
}
}
free(formats);
return requiresBigEndian;
}
void SourceFile::registerSelf()
{
static const int32_t SOURCE_PRIORITY = 2;
IoRegistrar::SourceCreationFunc sourceFunc = SourceFile::createRef;
OSStatus err;
UInt32 propertySize = 0;
err = AudioFileGetGlobalInfoSize(kAudioFileGlobalInfo_ReadableTypes, 0, NULL, &propertySize);
if( err ) {
//registers no types on error
return;
}
uint32_t * audioTypes = (uint32_t *)malloc(propertySize);
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_ReadableTypes, 0, NULL, &propertySize, audioTypes );
if( err ) {
//registers no types on error
free(audioTypes);
return;
}
int nTypes = propertySize / sizeof(uint32_t);
for( int i = 0; i < nTypes; i++ ) {
CFArrayRef extensions = NULL;
propertySize = sizeof(extensions);
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_ExtensionsForType, sizeof(uint32_t), (UInt32 *)&audioTypes[i], &propertySize, &extensions);
if ( ! err ) {
CFIndex nExtensions = CFArrayGetCount(extensions);
for( int j = 0; j < nExtensions; j++ ) {
CFStringRef cfext = (CFStringRef)CFArrayGetValueAtIndex(extensions, j);
Boolean res = FALSE;
char * ext = NULL;
uint8_t extLen = 3;
while( ! res && extLen < 5 ) {
ext = new char[extLen];
res = CFStringGetCString( cfext, ext, extLen * sizeof(char), kCFStringEncodingASCII );
if( res ) {
IoRegistrar::registerSourceType( ext, sourceFunc, SOURCE_PRIORITY );
}
delete ext;
ext = NULL;
extLen++;
}
}
}
}
free(audioTypes);
IoRegistrar::registerSourceGeneric( sourceFunc, SOURCE_PRIORITY );
}
CAAudioFileFormats::CAAudioFileFormats(bool loadDataFormats) :
mNumFileFormats(0), mFileFormats(NULL)
{
OSStatus err;
UInt32 size;
UInt32 *fileTypes = NULL;
// get all file types
err = AudioFileGetGlobalInfoSize(kAudioFileGlobalInfo_WritableTypes, 0, NULL, &size);
if (err != noErr) goto bail;
mNumFileFormats = size / sizeof(UInt32);
mFileFormats = new FileFormatInfo[mNumFileFormats];
fileTypes = new UInt32[mNumFileFormats];
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_WritableTypes, 0, NULL, &size, fileTypes);
if (err != noErr) goto bail;
// get info for each file type
for (int i = 0; i < mNumFileFormats; ++i) {
FileFormatInfo *ffi = &mFileFormats[i];
OSType filetype = fileTypes[i];
ffi->mFileTypeID = filetype;
// file type name
ffi->mFileTypeName = NULL;
size = sizeof(CFStringRef);
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_FileTypeName, sizeof(UInt32), &filetype, &size, &ffi->mFileTypeName);
if (err == noErr && ffi->mFileTypeName)
CFRetain(ffi->mFileTypeName);
// file extensions
size = sizeof(CFArrayRef);
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_ExtensionsForType,
sizeof(OSType), &filetype, &size, &ffi->mExtensions);
if (err)
ffi->mExtensions = NULL;
// file data formats
ffi->mNumDataFormats = 0;
ffi->mDataFormats = NULL;
if (loadDataFormats)
ffi->LoadDataFormats();
}
// sort file formats by name
qsort(mFileFormats, mNumFileFormats, sizeof(FileFormatInfo), CompareFileFormatNames);
bail:
delete[] fileTypes;
}
CAAudioFileFormats::CAAudioFileFormats() :
mNumFileFormats(0), mFileFormats(NULL)
{
OSStatus err;
UInt32 size;
UInt32 *fileTypes = NULL, *writableFormats = NULL, *readableFormats = NULL;
int nWritableFormats, nReadableFormats;
// get all file types
err = AudioFileGetGlobalInfoSize(kAudioFileGlobalInfo_WritableTypes, 0, NULL, &size);
if (err != noErr) goto bail;
mNumFileFormats = size / sizeof(UInt32);
mFileFormats = new FileFormatInfo[mNumFileFormats];
fileTypes = new UInt32[mNumFileFormats];
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_WritableTypes, 0, NULL, &size, fileTypes);
if (err != noErr) goto bail;
// get all writable formats
err = AudioFormatGetPropertyInfo(kAudioFormatProperty_EncodeFormatIDs, 0, NULL, &size);
if (err != noErr) goto bail;
nWritableFormats = size / sizeof(UInt32);
writableFormats = new UInt32[nWritableFormats];
err = AudioFormatGetProperty(kAudioFormatProperty_EncodeFormatIDs, 0, NULL, &size, writableFormats);
if (err != noErr) goto bail;
// get all readable formats
err = AudioFormatGetPropertyInfo(kAudioFormatProperty_DecodeFormatIDs, 0, NULL, &size);
if (err != noErr) goto bail;
nReadableFormats = size / sizeof(UInt32);
readableFormats = new UInt32[nReadableFormats];
err = AudioFormatGetProperty(kAudioFormatProperty_DecodeFormatIDs, 0, NULL, &size, readableFormats);
if (err != noErr) goto bail;
// get info for each file type
for (int i = 0; i < mNumFileFormats; ++i) {
FileFormatInfo *ffi = &mFileFormats[i];
OSType filetype = fileTypes[i];
ffi->mFileTypeID = filetype;
// file type name
ffi->mFileTypeName = NULL;
size = sizeof(CFStringRef);
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_FileTypeName, sizeof(UInt32), &filetype, &size, &ffi->mFileTypeName);
if (ffi->mFileTypeName)
CFRetain(ffi->mFileTypeName);
// file extensions
size = sizeof(CFArrayRef);
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_ExtensionsForType,
sizeof(OSType), &filetype, &size, &ffi->mExtensions);
if (err)
ffi->mExtensions = NULL;
// file data formats
ffi->mNumDataFormats = 0;
ffi->mDataFormats = NULL;
err = AudioFileGetGlobalInfoSize(kAudioFileGlobalInfo_AvailableFormatIDs,
sizeof(UInt32), &filetype, &size);
if (err == noErr) {
ffi->mNumDataFormats = size / sizeof(OSType);
OSType *formatIDs = new OSType[ffi->mNumDataFormats];
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_AvailableFormatIDs,
sizeof(UInt32), &filetype, &size, formatIDs);
if (err == noErr) {
ffi->mDataFormats = new DataFormatInfo[ffi->mNumDataFormats];
for (int j = 0; j < ffi->mNumDataFormats; ++j) {
int k;
bool anyBigEndian = false, anyLittleEndian = false;
DataFormatInfo *dfi = &ffi->mDataFormats[j];
dfi->mFormatID = formatIDs[j];
dfi->mReadable = (dfi->mFormatID == kAudioFormatLinearPCM);
dfi->mWritable = (dfi->mFormatID == kAudioFormatLinearPCM);
for (k = 0; k < nReadableFormats; ++k)
if (readableFormats[k] == dfi->mFormatID) {
dfi->mReadable = true;
break;
}
for (k = 0; k < nWritableFormats; ++k)
if (writableFormats[k] == dfi->mFormatID) {
dfi->mWritable = true;
break;
}
dfi->mNumVariants = 0;
AudioFileTypeAndFormatID tf = { filetype, dfi->mFormatID };
err = AudioFileGetGlobalInfoSize(kAudioFileGlobalInfo_AvailableStreamDescriptionsForFormat,
sizeof(AudioFileTypeAndFormatID), &tf, &size);
if (err == noErr) {
dfi->mNumVariants = size / sizeof(AudioStreamBasicDescription);
dfi->mVariants = new AudioStreamBasicDescription[dfi->mNumVariants];
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_AvailableStreamDescriptionsForFormat,
sizeof(AudioFileTypeAndFormatID), &tf, &size, dfi->mVariants);
if (err) {
dfi->mNumVariants = 0;
delete[] dfi->mVariants;
dfi->mVariants = NULL;
} else {
for (k = 0; k < dfi->mNumVariants; ++k) {
AudioStreamBasicDescription *desc = &dfi->mVariants[k];
if (desc->mBitsPerChannel > 8) {
if (desc->mFormatFlags & kAudioFormatFlagIsBigEndian)
anyBigEndian = true;
else
anyLittleEndian = true;
}
}
}
}
dfi->mEitherEndianPCM = (anyBigEndian && anyLittleEndian);
}
}
delete[] formatIDs;
}
}
// sort file formats by name
qsort(mFileFormats, mNumFileFormats, sizeof(FileFormatInfo), CompareFileFormatNames);
bail:
delete[] fileTypes;
delete[] readableFormats;
delete[] writableFormats;
}
void CAAudioFileFormats::FileFormatInfo::LoadDataFormats()
{
if (mDataFormats != NULL) return;
UInt32 *writableFormats = NULL, *readableFormats = NULL;
int nWritableFormats, nReadableFormats;
// get all writable formats
UInt32 size;
OSStatus err = AudioFormatGetPropertyInfo(kAudioFormatProperty_EncodeFormatIDs, 0, NULL, &size);
if (err != noErr) goto bail;
nWritableFormats = size / sizeof(UInt32);
writableFormats = new UInt32[nWritableFormats];
err = AudioFormatGetProperty(kAudioFormatProperty_EncodeFormatIDs, 0, NULL, &size, writableFormats);
if (err != noErr) goto bail;
// get all readable formats
err = AudioFormatGetPropertyInfo(kAudioFormatProperty_DecodeFormatIDs, 0, NULL, &size);
if (err != noErr) goto bail;
nReadableFormats = size / sizeof(UInt32);
readableFormats = new UInt32[nReadableFormats];
err = AudioFormatGetProperty(kAudioFormatProperty_DecodeFormatIDs, 0, NULL, &size, readableFormats);
if (err != noErr) goto bail;
err = AudioFileGetGlobalInfoSize(kAudioFileGlobalInfo_AvailableFormatIDs, sizeof(UInt32), &mFileTypeID, &size);
if (err == noErr) {
mNumDataFormats = size / sizeof(OSType);
OSType *formatIDs = new OSType[mNumDataFormats];
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_AvailableFormatIDs,
sizeof(UInt32), &mFileTypeID, &size, formatIDs);
if (err == noErr) {
mDataFormats = new DataFormatInfo[mNumDataFormats];
for (int j = 0; j < mNumDataFormats; ++j) {
int k;
bool anyBigEndian = false, anyLittleEndian = false;
DataFormatInfo *dfi = &mDataFormats[j];
dfi->mFormatID = formatIDs[j];
dfi->mReadable = (dfi->mFormatID == kAudioFormatLinearPCM);
dfi->mWritable = (dfi->mFormatID == kAudioFormatLinearPCM);
for (k = 0; k < nReadableFormats; ++k)
if (readableFormats[k] == dfi->mFormatID) {
dfi->mReadable = true;
break;
}
for (k = 0; k < nWritableFormats; ++k)
if (writableFormats[k] == dfi->mFormatID) {
dfi->mWritable = true;
break;
}
dfi->mNumVariants = 0;
AudioFileTypeAndFormatID tf = { mFileTypeID, dfi->mFormatID };
err = AudioFileGetGlobalInfoSize(kAudioFileGlobalInfo_AvailableStreamDescriptionsForFormat,
sizeof(AudioFileTypeAndFormatID), &tf, &size);
if (err == noErr) {
dfi->mNumVariants = size / sizeof(AudioStreamBasicDescription);
dfi->mVariants = new AudioStreamBasicDescription[dfi->mNumVariants];
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_AvailableStreamDescriptionsForFormat,
sizeof(AudioFileTypeAndFormatID), &tf, &size, dfi->mVariants);
if (err) {
dfi->mNumVariants = 0;
delete[] dfi->mVariants;
dfi->mVariants = NULL;
} else {
for (k = 0; k < dfi->mNumVariants; ++k) {
AudioStreamBasicDescription *desc = &dfi->mVariants[k];
if (desc->mBitsPerChannel > 8) {
if (desc->mFormatFlags & kAudioFormatFlagIsBigEndian)
anyBigEndian = true;
else
anyLittleEndian = true;
}
}
}
}
dfi->mEitherEndianPCM = (anyBigEndian && anyLittleEndian);
}
}
delete[] formatIDs;
}
bail:
delete[] readableFormats;
delete[] writableFormats;
}