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livetrax/libs/appleutility/CoreAudio/PublicUtility/CAAudioFileFormats.h

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C++

/*
File: CAAudioFileFormats.h
Abstract: Part of CoreAudio Utility Classes
Version: 1.1
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*/
#ifndef __CAAudioFileFormats_h__
#define __CAAudioFileFormats_h__
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
#include <AudioToolbox/AudioToolbox.h>
#else
#include <AudioToolbox.h>
#endif
#include "CAStreamBasicDescription.h"
class CAAudioFileFormats {
public:
enum { noErr = 0 };
struct DataFormatInfo {
DataFormatInfo() : mVariants(NULL) { }
~DataFormatInfo() { delete[] mVariants; }
UInt32 mFormatID;
int mNumVariants;
AudioStreamBasicDescription * mVariants;
bool mReadable;
bool mWritable;
bool mEitherEndianPCM;
#if DEBUG
void DebugPrint();
#endif
};
struct FileFormatInfo {
FileFormatInfo() : mFileTypeName(NULL), mExtensions(NULL), mDataFormats(NULL) { }
~FileFormatInfo() {
delete[] mDataFormats;
if (mFileTypeName)
CFRelease(mFileTypeName);
if (mExtensions)
CFRelease(mExtensions);
}
AudioFileTypeID mFileTypeID;
CFStringRef mFileTypeName;
CFArrayRef mExtensions;
int mNumDataFormats;
DataFormatInfo * mDataFormats; // NULL until loaded!
int NumberOfExtensions() { return static_cast<int>(mExtensions ? CFArrayGetCount(mExtensions) : 0); }
char * GetExtension(int index, char *buf, int buflen) {
CFStringRef cfext = (CFStringRef)CFArrayGetValueAtIndex(mExtensions, index);
CFStringGetCString(cfext, buf, buflen, kCFStringEncodingUTF8);
return buf;
}
bool MatchExtension(CFStringRef testExt) { // testExt should not include "."
CFIndex n = NumberOfExtensions();
for (CFIndex i = 0; i < n; ++i) {
CFStringRef ext = (CFStringRef)CFArrayGetValueAtIndex(mExtensions, i);
if (CFStringCompare(ext, testExt, kCFCompareCaseInsensitive) == kCFCompareEqualTo)
return true;
}
return false;
}
bool AnyWritableFormats();
void LoadDataFormats();
#if DEBUG
void DebugPrint();
#endif
};
private: // use Instance()
CAAudioFileFormats(bool loadDataFormats);
~CAAudioFileFormats();
public:
bool InferDataFormatFromFileFormat(AudioFileTypeID filetype, CAStreamBasicDescription &fmt);
bool InferFileFormatFromFilename(const char *filename, AudioFileTypeID &filetype);
bool InferFileFormatFromFilename(CFStringRef filename, AudioFileTypeID &filetype);
bool InferFileFormatFromDataFormat(const CAStreamBasicDescription &fmt, AudioFileTypeID &filetype);
bool IsKnownDataFormat(UInt32 dataFormat);
#if DEBUG
void DebugPrint();
#endif
int mNumFileFormats;
FileFormatInfo * mFileFormats;
FileFormatInfo * FindFileFormat(UInt32 formatID);
static CAAudioFileFormats * Instance(bool loadDataFormats=true);
private:
static CAAudioFileFormats * sInstance;
};
char * OSTypeToStr(char *buf, size_t bufsize, UInt32 t);
int StrToOSType(const char *str, UInt32 &t);
#endif // __CAAudioFileFormats_h__