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

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/*
File: CAExtAudioFile.h
Abstract: Part of CoreAudio Utility Classes
Version: 1.1
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*/
#ifndef __CAExtAudioFile_h__
#define __CAExtAudioFile_h__
#include <TargetConditionals.h>
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
#include <AudioToolbox/ExtendedAudioFile.h>
#include <AudioToolbox/AudioConverter.h>
#else
#include "ExtendedAudioFile.h"
#include "AudioConverter.h"
#endif
#include "CAXException.h"
//#include "CAAutoDisposer.h"
#include "CAStreamBasicDescription.h"
#include "CAAudioChannelLayout.h"
#include "CACFObject.h"
// A C++ wrapper for ExtAudioFile
// Error returns throw CAXExceptions.
class CAExtAudioFile {
public:
// instances are not automatically associated with open files.
CAExtAudioFile() :
mExtAudioFile(NULL) { }
virtual ~CAExtAudioFile()
{
Close();
}
bool IsValid() const { return mExtAudioFile != NULL; }
void Open(const char* filename)
{
Close();
CFURLRef url = CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault, (const UInt8*)filename, strlen(filename), false);
XThrowIf(!url, -1, "couldn't convert path to CFURLRef");
OSStatus res = ExtAudioFileOpenURL(url, &mExtAudioFile);
if (res)
CFRelease(url);
Check(res, "ExtAudioFileOpenURL");
CFRelease (url);
}
// this group of methods maps directly to the API other than OSStatus results translating into exceptions.
// you must explicitly open, wrap or create a file.
void OpenURL(CFURLRef url)
{
Close();
Check(ExtAudioFileOpenURL(url, &mExtAudioFile), "ExtAudioFileOpenURL");
}
void WrapAudioFileID(AudioFileID inFileID, Boolean forWriting)
{
Close();
Check(ExtAudioFileWrapAudioFileID(inFileID, forWriting, &mExtAudioFile), "ExtAudioFileWrapAudioFileID");
}
void Create(const char *filePath, AudioFileTypeID filetype, const AudioStreamBasicDescription &streamDesc, const AudioChannelLayout *channelLayout, UInt32 flags)
{
CFURLRef url = CFURLCreateFromFileSystemRepresentation(NULL, (const UInt8 *)filePath, strlen(filePath), false);
XThrowIf(!url, -1, "couldn't convert path to CFURLRef");
Close();
OSStatus res = ExtAudioFileCreateWithURL(url, filetype, &streamDesc, channelLayout, flags, &mExtAudioFile);
if (res)
CFRelease(url);
Check(res, "ExtAudioFileCreateWithURL");
CFRelease(url);
}
void CreateWithURL(CFURLRef url, AudioFileTypeID filetype, const AudioStreamBasicDescription &streamDesc, const AudioChannelLayout *channelLayout, UInt32 flags)
{
Close();
Check(ExtAudioFileCreateWithURL(url, filetype, &streamDesc, channelLayout, flags, &mExtAudioFile), "ExtAudioFileCreateWithURL");
}
// you may explicitly close a file, or have it closed automatically by the destructor.
void Close()
{
if (mExtAudioFile != NULL) {
Check(ExtAudioFileDispose(mExtAudioFile), "ExtAudioFileClose");
mExtAudioFile = NULL;
}
}
void Read(UInt32 &ioNumberFrames, AudioBufferList *ioData)
{
Check(ExtAudioFileRead(mExtAudioFile, &ioNumberFrames, ioData), "ExtAudioFileRead");
}
OSStatus Write(UInt32 inNumberFrames, const AudioBufferList *ioData)
{
OSStatus err = ExtAudioFileWrite(mExtAudioFile, inNumberFrames, ioData);
switch (err) {
// noErr and certain special errors are returned without an exception
case noErr:
break;
#if TARGET_OS_IPHONE
case kExtAudioFileError_CodecUnavailableInputConsumed:
case kExtAudioFileError_CodecUnavailableInputNotConsumed:
break;
#endif
default:
// throw an exception
Check(err, "ExtAudioFileWrite");
break;
}
return err;
}
void WriteAsync(UInt32 inNumberFrames, const AudioBufferList *ioData)
{
Check(ExtAudioFileWriteAsync(mExtAudioFile, inNumberFrames, ioData), "ExtAudioFileWriteAsync");
}
void Seek(SInt64 inFrameOffset)
{
Check(ExtAudioFileSeek(mExtAudioFile, inFrameOffset), "ExtAudioFileSeek");
}
SInt64 Tell() const
{
SInt64 pos;
Check(ExtAudioFileTell(mExtAudioFile, &pos), "ExtAudioFileTell");
return pos;
}
UInt32 GetPropertyInfo(ExtAudioFilePropertyID propid, Boolean *outWritable) const
{
UInt32 size;
CheckProperty(ExtAudioFileGetPropertyInfo(mExtAudioFile, propid, &size, outWritable), "ExtAudioFileGetPropertyInfo", propid);
return size;
}
void GetProperty(ExtAudioFilePropertyID propid, UInt32 &ioSize, void *outData) const
{
CheckProperty(ExtAudioFileGetProperty(mExtAudioFile, propid, &ioSize, outData), "ExtAudioFileGetProperty", propid);
}
void SetProperty(ExtAudioFilePropertyID propid, UInt32 size, const void *inData)
{
CheckProperty(ExtAudioFileSetProperty(mExtAudioFile, propid, size, inData), "ExtAudioFileSetProperty", propid);
}
const CAAudioChannelLayout &GetFileChannelLayout()
{
return FetchChannelLayout(mFileChannelLayout, kExtAudioFileProperty_FileChannelLayout);
}
void SetFileChannelLayout(const CAAudioChannelLayout &layout) {
SetProperty(kExtAudioFileProperty_FileChannelLayout, layout.Size(), &layout.Layout());
}
const CAStreamBasicDescription &GetFileDataFormat()
{
UInt32 size = sizeof(mFileDataFormat);
GetProperty(kExtAudioFileProperty_FileDataFormat, size, &mFileDataFormat);
return mFileDataFormat;
}
const CAStreamBasicDescription &GetClientDataFormat() {
UInt32 size = sizeof(mClientDataFormat);
GetProperty(kExtAudioFileProperty_ClientDataFormat, size, &mClientDataFormat);
return mClientDataFormat;
}
void SetClientFormat(const CAStreamBasicDescription &dataFormat, const CAAudioChannelLayout *layout=NULL, UInt32 codecManuf=0) {
if (codecManuf != 0)
SetProperty('cman' /*kExtAudioFileProperty_CodecManufacturer*/, sizeof(codecManuf), &codecManuf);
SetProperty(kExtAudioFileProperty_ClientDataFormat, sizeof(dataFormat), &dataFormat);
if (layout)
SetClientChannelLayout(*layout);
}
void SetClientChannelLayout(const CAAudioChannelLayout &layout) {
SetProperty(kExtAudioFileProperty_ClientChannelLayout, layout.Size(), &layout.Layout());
}
AudioConverterRef GetConverter() const {
UInt32 size = sizeof(AudioConverterRef);
AudioConverterRef converter = NULL;
GetProperty(kExtAudioFileProperty_AudioConverter, size, &converter);
return converter;
}
bool HasConverter() const { return GetConverter() != NULL; }
OSStatus SetConverterProperty(AudioConverterPropertyID inPropertyID, UInt32 inPropertyDataSize, const void *inPropertyData, bool inCanFail=false)
{
OSStatus err = AudioConverterSetProperty(GetConverter(), inPropertyID, inPropertyDataSize, inPropertyData);
if (!inCanFail)
XThrowIfError(err, "Couldn't set audio converter property");
if (!err) {
// must tell the file that we have changed the converter; a NULL converter config is sufficient
CFPropertyListRef config = NULL;
SetProperty(kExtAudioFileProperty_ConverterConfig, sizeof(CFPropertyListRef), &config);
}
return err;
}
SInt64 GetNumberFrames() {
SInt64 length;
UInt32 size = sizeof(SInt64);
GetProperty(kExtAudioFileProperty_FileLengthFrames, size, &length);
return length;
}
protected:
virtual void Check(OSStatus err, const char *func) const
{
if (err) {
char txt[128];
snprintf(txt, sizeof(txt), "%s failed", func);
throw CAXException(txt, err);
}
}
virtual void CheckProperty(OSStatus err, const char *func, UInt32 propid) const
{
if (err) {
char txt[128];
char propstr[] = CA4CCToCString(propid);
snprintf(txt, sizeof(txt), "%s ('%s') failed", func, propstr);
throw CAXException(txt, err);
}
}
const CAAudioChannelLayout & FetchChannelLayout(CAAudioChannelLayout &layoutObj, ExtAudioFilePropertyID propID) {
UInt32 size = GetPropertyInfo(propID, NULL);
CAAutoFree<AudioChannelLayout> layout;
layout.allocBytes(size);
GetProperty(propID, size, layout);
layoutObj = layout;
return layoutObj;
}
private:
CAExtAudioFile(const CAExtAudioFile &) { } // prohibit
CAExtAudioFile & operator = (const CAExtAudioFile &) { return *this; } // prohibit
private:
ExtAudioFileRef mExtAudioFile;
// for convenience to the client, it helps if we hold onto some storage for these
CAStreamBasicDescription mFileDataFormat;
CAAudioChannelLayout mFileChannelLayout;
CAStreamBasicDescription mClientDataFormat;
};
#endif // __CAExtAudioFile_h__