Cider Isn't Darwin Emulation, Really
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Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in consideration of your agreement to the following terms, and your use, installation, modification or redistribution of this Apple software constitutes acceptance of these terms. If you do not agree with these terms, please do not use, install, modify or redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and subject to these terms, Apple grants you a personal, non-exclusive license, under Apple�s copyrights in this original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the Apple Software, with or without modifications, in source and/or binary forms; provided that if you redistribute the Apple Software in its entirety and without modifications, you must retain this notice and the following text and disclaimers in all such redistributions of the Apple Software. Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to endorse or promote products derived from the Apple Software without specific prior written permission from Apple. Except as expressly stated in this notice, no other rights or licenses, express or implied, are granted by Apple herein, including but not limited to any patent rights that may be infringed by your derivative works or by other works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.*//*============================================================================= CAAudioFileConverter.h =============================================================================*/
#ifndef __CAAudioFileConverter_h__#define __CAAudioFileConverter_h__
/* Compile options: CAAUDIOFILE_PROFILE*/
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__) #include <AudioToolbox/AudioToolbox.h>#else #include <AudioToolbox.h>#endif#include "CAStreamBasicDescription.h"#include "CABufferList.h"#include "CAHostTimeBase.h"#include "CAAudioChannelLayout.h"#include "CAAudioFile.h"
class CAAudioFileConverter {public: // options for ConversionParameters.flags enum { kOpt_OverwriteOutputFile = 1, kOpt_Verbose = 2, kOpt_CAFTag = 4, // tags encoded CAF files with info about the source file // or restores based on it when decoding kOpt_NoSanitizeOutputFormat = 8 // used internally }; struct ConversionParameters { ConversionParameters(); UInt32 flags; struct { const char * filePath; // POSIX path, UTF-8 AudioFileID audioFileID; // or set this to non-zero AudioChannelLayoutTag channelLayoutTag; // 0 to use the one in the file, or default } input; struct { const char * filePath; // POSIX path; if null, file is written to same // directory as input file, name generated from // its name with the appropriate filename extension // (fails if file already exists) AudioFileTypeID fileType; CAStreamBasicDescription dataFormat; int channels; // -1 for same number of channels as input SInt32 bitRate; // -1 for default SInt32 codecQuality; // 0-127, -1 for default SInt32 srcQuality; // 0-127, -1 for default SInt32 strategy; // 0-2, -1 for default SInt32 primeMethod; // 0-2, -1 for default AudioChannelLayoutTag channelLayoutTag; // 0 for default } output; //UInt32 bufferSize; // [UNIMPLEMENTED] }; CAAudioFileConverter();
virtual ~CAAudioFileConverter(); void ConvertFile(const ConversionParameters ¶ms); virtual bool Progress(SInt64 packetsConverted, SInt64 packetsTotal) { return false; } virtual void GenerateOutputFileName(const char *inputFilePath, const CAStreamBasicDescription &inputFormat, const CAStreamBasicDescription &outputFormat, OSType outputFileType, char *outName); const char * GetOutputFileName() { return mOutName; } const CAAudioFile & InputFile() { return mSrcFile; } const CAAudioFile & OutputFile() { return mDestFile; } // customization virtual void PrepareConversion() { } virtual void OpenInputFile(); virtual void OpenOutputFile(const CAStreamBasicDescription &srcFormat, const CAStreamBasicDescription &destFormat, FSRef &destFSRef, CAAudioChannelLayout &destFileLayout); virtual void ComputeReadSize(const CAStreamBasicDescription &srcFormat, const CAStreamBasicDescription &destFormat, UInt32 &bytesToRead, UInt32 &framesToRead) { } virtual void BeginConversion() { } virtual void EndConversion() { } virtual bool ShouldTerminateConversion() { return false; }
bool TaggedEncodingToCAF() const { return (mParams.flags & kOpt_CAFTag) && mDestFormat.mFormatID != kAudioFormatLinearPCM && mParams.output.fileType == kAudioFileCAFType; } bool TaggedDecodingFromCAF() const { return (mParams.flags & kOpt_CAFTag) && mSrcFormat.mFormatID != kAudioFormatLinearPCM; // don't know for sure that the source file is CAF... } void WriteCAFInfo(); void ReadCAFInfo(); protected: void PrintFormats(const CAAudioChannelLayout *origSrcFileLayout);
ConversionParameters mParams; CAAudioFile mSrcFile; CAAudioFile mDestFile; CAStreamBasicDescription mSrcFormat; // valid after OpenInputFile CAStreamBasicDescription mDestFormat; // valid after OpenOutputFile private: CABufferList * mReadBuffer; CABufferList * mReadPtrs;
protected: char mOutName[PATH_MAX];};
#endif // __CAAudioFileConverter_h__