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.cpp =============================================================================*/
#include "CAAudioFileConverter.h"#include "CAChannelLayouts.h"#include <sys/stat.h>#include <algorithm>#include "CAXException.h"#include "CAFilePathUtils.h"#if !TARGET_OS_MAC #include <AudioCodec.h>#endif
char* dirname(const char* str){ static char buffer[4096]; strcpy(buffer, str); return dirname(buffer);}char* basename(const char* str){ static char buffer[4096]; strcpy(buffer, str); return basename(buffer);}
CAAudioFileConverter::ConversionParameters::ConversionParameters() : flags(0){ memset(&input, 0, sizeof(input)); memset(&output, 0, sizeof(output)); output.channels = -1; output.bitRate = -1; output.codecQuality = -1; output.srcQuality = -1; output.strategy = -1; output.primeMethod = -1;}
CAAudioFileConverter::CAAudioFileConverter() : mReadBuffer(NULL), mReadPtrs(NULL){ mOutName[0] = '\0';}
CAAudioFileConverter::~CAAudioFileConverter(){}
void CAAudioFileConverter::GenerateOutputFileName(const char *inputFilePath, const CAStreamBasicDescription &inputFormat, const CAStreamBasicDescription &outputFormat, OSType outputFileType, char *outName){ struct stat sb; char inputDir[256]; char inputBasename[256]; strcpy(inputDir, dirname(inputFilePath)); const char *infname = basename(inputFilePath); const char *inext = strrchr(infname, '.'); if (inext == NULL) strcpy(inputBasename, infname); else { int n; memcpy(inputBasename, infname, n = inext - infname); inputBasename[n] = '\0'; } CFArrayRef exts; UInt32 propSize = sizeof(exts); XThrowIfError(AudioFileGetGlobalInfo(kAudioFileGlobalInfo_ExtensionsForType, sizeof(OSType), &outputFileType, &propSize, &exts), "generate output file name"); char outputExt[32]; CFStringRef cfext = (CFStringRef)CFArrayGetValueAtIndex(exts, 0); CFStringGetCString(cfext, outputExt, sizeof(outputExt), kCFStringEncodingUTF8); CFRelease(exts); // 1. olddir + oldname + newext sprintf(outName, "%s/%s.%s", inputDir, inputBasename, outputExt);#if TARGET_OS_MAC if (lstat(outName, &sb)) return;#else if (stat(outName, &sb)) return;#endif
if (outputFormat.IsPCM()) { // If sample rate changed: // 2. olddir + oldname + "-SR" + newext if (inputFormat.mSampleRate != outputFormat.mSampleRate && outputFormat.mSampleRate != 0.) { sprintf(outName, "%s/%s-%.0fk.%s", inputDir, inputBasename, outputFormat.mSampleRate/1000., outputExt);#if TARGET_OS_MAC if (lstat(outName, &sb)) return;#else if (stat(outName, &sb)) return;#endif } // If bit depth changed: // 3. olddir + oldname + "-bit" + newext if (inputFormat.mBitsPerChannel != outputFormat.mBitsPerChannel) { sprintf(outName, "%s/%s-%ldbit.%s", inputDir, inputBasename, outputFormat.mBitsPerChannel, outputExt);#if TARGET_OS_MAC if (lstat(outName, &sb)) return;#else if (stat(outName, &sb)) return;#endif } } // maybe more with channels/layouts? $$$ // now just append digits for (int i = 1; ; ++i) { sprintf(outName, "%s/%s-%d.%s", inputDir, inputBasename, i, outputExt);#if TARGET_OS_MAC if (lstat(outName, &sb)) return;#else if (stat(outName, &sb)) return;#endif }}
void CAAudioFileConverter::PrintFormats(const CAAudioChannelLayout *origSrcFileLayout){ const CAAudioChannelLayout &srcFileLayout = mSrcFile.GetFileChannelLayout(); const CAAudioChannelLayout &destFileLayout = mDestFile.GetFileChannelLayout(); // see where we've gotten if (mParams.flags & kOpt_Verbose) { printf("Formats:\n"); mSrcFile.GetFileDataFormat().PrintFormat(stdout, " ", "Input file "); if (srcFileLayout.IsValid()) { printf(" %s", CAChannelLayouts::ConstantToString(srcFileLayout.Tag())); if (srcFileLayout.IsValid() && origSrcFileLayout != NULL && srcFileLayout != *origSrcFileLayout) printf(" -- overriding layout %s in file", CAChannelLayouts::ConstantToString(origSrcFileLayout->Tag())); printf("\n"); } mDestFile.GetFileDataFormat().PrintFormat(stdout, " ", "Output file "); if (destFileLayout.IsValid()) printf(" %s\n", CAChannelLayouts::ConstantToString(destFileLayout.Tag())); if (mSrcFile.HasConverter()) { mSrcFile.GetClientDataFormat().PrintFormat(stdout, " ", "Input client "); CAShow(mSrcFile.GetConverter()); } if (mDestFile.HasConverter()) { mDestFile.GetClientDataFormat().PrintFormat(stdout, " ", "Output client"); CAShow(mDestFile.GetConverter()); } }}
void CAAudioFileConverter::OpenInputFile(){ if (mParams.input.audioFileID) mSrcFile.Wrap(mParams.input.audioFileID, false); else mSrcFile.Open(mParams.input.filePath);}
void CAAudioFileConverter::OpenOutputFile(const CAStreamBasicDescription &srcFormat, const CAStreamBasicDescription &destFormat, FSRef &destFSRef, CAAudioChannelLayout &destFileLayout){ const ConversionParameters ¶ms = mParams; // output file if (params.output.filePath == NULL) { GenerateOutputFileName(params.input.filePath, srcFormat, destFormat, params.output.fileType, mOutName); } else strcpy(mOutName, params.output.filePath); // deal with pre-existing output file if (FSPathMakeRef((UInt8 *)mOutName, &destFSRef, NULL) == noErr) { XThrowIf(!(params.flags & kOpt_OverwriteOutputFile), 1, "overwrite output file"); // not allowed to overwrite // output file exists - delete it XThrowIfError(FSDeleteObject(&destFSRef), "delete output file"); } // get FSRef/CFStringRef for output file FSRef outFolderFSRef; CFStringRef outFileName; XThrowIfError(PosixPathToParentFSRefAndName(mOutName, outFolderFSRef, outFileName), "locate output audio file"); // create the output file mDestFile.CreateNew(outFolderFSRef, outFileName, params.output.fileType, destFormat, &destFileLayout.Layout()); CFRelease(outFileName);}
void CAAudioFileConverter::ConvertFile(const ConversionParameters &_params){ FSRef destFSRef; UInt32 propertySize; CAStreamBasicDescription destFormat; CAAudioChannelLayout origSrcFileLayout, srcFileLayout, destFileLayout; bool openedSourceFile = false, createdOutputFile = false; mParams = _params; mReadBuffer = NULL; mReadPtrs = NULL; CABufferList *writeBuffer = NULL; CABufferList *writePtrs = NULL; PrepareConversion();
try { if (TaggedDecodingFromCAF()) ReadCAFInfo(); OpenInputFile(); openedSourceFile = true; // get input file's format const CAStreamBasicDescription &srcFormat = mSrcFile.GetFileDataFormat(); if (mParams.flags & kOpt_Verbose) { printf("Input file: %s, %qd frames\n", mParams.input.filePath ? basename(mParams.input.filePath) : "?", mSrcFile.GetNumberFrames()); } mSrcFormat = srcFormat; // prepare output file's format destFormat = mParams.output.dataFormat;
bool encoding = !destFormat.IsPCM(); bool decoding = !srcFormat.IsPCM(); if (!encoding && destFormat.mSampleRate == 0.) // on encode, it's OK to have a 0 sample rate; ExtAudioFile will get the SR from the converter and set it on the file. // on decode or PCM->PCM, a sample rate of 0 is interpreted as using the source sample rate destFormat.mSampleRate = srcFormat.mSampleRate; // source channel layout srcFileLayout = mSrcFile.GetFileChannelLayout(); origSrcFileLayout = srcFileLayout; if (mParams.input.channelLayoutTag != 0) { XThrowIf(AudioChannelLayoutTag_GetNumberOfChannels(mParams.input.channelLayoutTag) != srcFormat.mChannelsPerFrame, -1, "input channel layout has wrong number of channels for file"); srcFileLayout = CAAudioChannelLayout(mParams.input.channelLayoutTag); mSrcFile.SetFileChannelLayout(srcFileLayout); } // destination channel layout int outChannels = mParams.output.channels; if (mParams.output.channelLayoutTag != 0) { // use the one specified by caller, if any destFileLayout = CAAudioChannelLayout(mParams.output.channelLayoutTag); } else if (srcFileLayout.IsValid()) { // otherwise, assume the same as the source, if any destFileLayout = srcFileLayout; } if (destFileLayout.IsValid()) { // the output channel layout specifies the number of output channels if (outChannels != -1) XThrowIf((unsigned)outChannels != destFileLayout.NumberChannels(), -1, "output channel layout has wrong number of channels"); else outChannels = destFileLayout.NumberChannels(); }
if (!(mParams.flags & kOpt_NoSanitizeOutputFormat)) { // adjust the output format's channels; output.channels overrides the channels if (outChannels == -1) outChannels = srcFormat.mChannelsPerFrame; if (outChannels > 0) { destFormat.mChannelsPerFrame = outChannels; destFormat.mBytesPerPacket *= outChannels; destFormat.mBytesPerFrame *= outChannels; } // use AudioFormat API to clean up the output format propertySize = sizeof(AudioStreamBasicDescription); XThrowIfError(AudioFormatGetProperty(kAudioFormatProperty_FormatInfo, 0, NULL, &propertySize, &destFormat), "get destination format info"); } OpenOutputFile(srcFormat, destFormat, destFSRef, destFileLayout); createdOutputFile = true; mDestFormat = destFormat; // set up client formats CAStreamBasicDescription srcClientFormat, destClientFormat; { CAAudioChannelLayout srcClientLayout, destClientLayout; if (encoding) { if (decoding) { // transcoding// XThrowIf(encoding && decoding, -1, "transcoding not currently supported"); if (srcFormat.mChannelsPerFrame > 2 || destFormat.mChannelsPerFrame > 2) CAXException::Warning("Transcoding multichannel audio may not handle channel layouts correctly", 0); srcClientFormat.SetCanonical(std::min(srcFormat.mChannelsPerFrame, destFormat.mChannelsPerFrame), true); srcClientFormat.mSampleRate = std::max(srcFormat.mSampleRate, destFormat.mSampleRate); mSrcFile.SetClientFormat(srcClientFormat, NULL); destClientFormat = srcClientFormat; } else { // encoding srcClientFormat = srcFormat; destClientFormat = srcFormat; } // by here, destClientFormat will have a valid sample rate destClientLayout = srcFileLayout.IsValid() ? srcFileLayout : destFileLayout;
mDestFile.SetClientFormat(destClientFormat, &destClientLayout); } else { // decoding or PCM->PCM if (destFormat.mSampleRate == 0.) destFormat.mSampleRate = srcFormat.mSampleRate; destClientFormat = destFormat; srcClientFormat = destFormat; srcClientLayout = destFileLayout; mSrcFile.SetClientFormat(srcClientFormat, &srcClientLayout); } } XThrowIf(srcClientFormat.mBytesPerPacket == 0, -1, "source client format not PCM"); XThrowIf(destClientFormat.mBytesPerPacket == 0, -1, "dest client format not PCM"); if (encoding) { // set the bitrate if (mParams.output.bitRate != -1) { if (mParams.flags & kOpt_Verbose) printf("bitrate = %ld\n", mParams.output.bitRate); mDestFile.SetConverterProperty(kAudioConverterEncodeBitRate, sizeof(UInt32), &mParams.output.bitRate); }
// set the codec quality if (mParams.output.codecQuality != -1) { if (mParams.flags & kOpt_Verbose) printf("codec quality = %ld\n", mParams.output.codecQuality); mDestFile.SetConverterProperty(kAudioConverterCodecQuality, sizeof(UInt32), &mParams.output.codecQuality); }
// set the bitrate strategy -- called bitrate format in the codecs since it had already shipped if (mParams.output.strategy != -1) { if (mParams.flags & kOpt_Verbose) printf("strategy = %ld\n", mParams.output.strategy); mDestFile.SetConverterProperty(kAudioCodecBitRateFormat, sizeof(UInt32), &mParams.output.strategy); } } // set the SRC quality if (mParams.output.srcQuality != -1) { if (srcFormat.mSampleRate != 0. && destFormat.mSampleRate != 0. && srcFormat.mSampleRate != destFormat.mSampleRate) { if (mParams.flags & kOpt_Verbose) printf("SRC quality = %ld\n", mParams.output.srcQuality); if (encoding) mDestFile.SetConverterProperty(kAudioConverterSampleRateConverterQuality, sizeof(UInt32), &mParams.output.srcQuality); else mSrcFile.SetConverterProperty(kAudioConverterSampleRateConverterQuality, sizeof(UInt32), &mParams.output.srcQuality); } } if (decoding) { if (mParams.output.primeMethod != -1) mSrcFile.SetConverterProperty(kAudioConverterPrimeMethod, sizeof(UInt32), &mParams.output.primeMethod); }
PrintFormats(&origSrcFileLayout);
// prepare I/O buffers UInt32 bytesToRead = 0x10000; UInt32 framesToRead = bytesToRead; // OK, ReadPackets will limit as appropriate ComputeReadSize(srcFormat, destFormat, bytesToRead, framesToRead);
// const SInt64 totalFrames = mSrcFile.GetNumberFrames();//#warning "GetNumberFrames() can be prohibitively slow for some formats" mReadBuffer = CABufferList::New("readbuf", srcClientFormat); mReadBuffer->AllocateBuffers(bytesToRead); mReadPtrs = CABufferList::New("readptrs", srcClientFormat); BeginConversion(); while (true) { //XThrowIf(Progress(mSrcFile.Tell(), totalFrames), userCanceledErr, "user stopped"); // this was commented out for awhile -- performance? make it optional? UInt32 nFrames = framesToRead; mReadPtrs->SetFrom(mReadBuffer); AudioBufferList *readbuf = &mReadPtrs->GetModifiableBufferList(); mSrcFile.Read(nFrames, readbuf); //printf("read %ld of %ld frames\n", nFrames, framesToRead); if (nFrames == 0) break;
mDestFile.Write(nFrames, readbuf); if (ShouldTerminateConversion()) break; } if (decoding) { // fix up the destination file's length if necessary and possible SInt64 nframes = mSrcFile.GetNumberFrames(); if (nframes != 0) { // only shorten, don't try to lengthen nframes = SInt64(ceil(nframes * destFormat.mSampleRate / srcFormat.mSampleRate)); if (nframes < mDestFile.GetNumberFrames()) { mDestFile.SetNumberFrames(nframes); } } } EndConversion(); } catch (...) { delete mReadBuffer; delete mReadPtrs; delete writeBuffer; delete writePtrs; try { mSrcFile.Close(); } catch (...) { } try { mDestFile.Close(); } catch (...) { } if (createdOutputFile) unlink(mOutName); throw; } delete mReadBuffer; delete mReadPtrs; delete writeBuffer; delete writePtrs; mSrcFile.Close(); mDestFile.Close(); if (TaggedEncodingToCAF()) WriteCAFInfo(); if (mParams.flags & kOpt_Verbose) { // must close to flush encoder; GetNumberFrames() not necessarily valid until afterwards but then // the file is closed CAAudioFile temp; FSRef destFSRef; if (FSPathMakeRef((UInt8 *)mOutName, &destFSRef, NULL) == noErr) { temp.Open(destFSRef); printf("Output file: %s, %qd frames\n", basename(mOutName), temp.GetNumberFrames()); } }}
#define kMaxFilename 64struct CAFSourceInfo { // our private user data chunk -- careful about compiler laying this out! // big endian char asbd[40]; UInt32 filetype; char filename[kMaxFilename];};
static void ASBD_NtoB(const AudioStreamBasicDescription *infmt, AudioStreamBasicDescription *outfmt){ *(UInt64 *)&outfmt->mSampleRate = EndianU64_NtoB(*(UInt64 *)&infmt->mSampleRate); outfmt->mFormatID = EndianU32_NtoB(infmt->mFormatID); outfmt->mFormatFlags = EndianU32_NtoB(infmt->mFormatFlags); outfmt->mBytesPerPacket = EndianU32_NtoB(infmt->mBytesPerPacket); outfmt->mFramesPerPacket = EndianU32_NtoB(infmt->mFramesPerPacket); outfmt->mBytesPerFrame = EndianU32_NtoB(infmt->mBytesPerFrame); outfmt->mChannelsPerFrame = EndianU32_NtoB(infmt->mChannelsPerFrame); outfmt->mBitsPerChannel = EndianU32_NtoB(infmt->mBitsPerChannel);}
static void ASBD_BtoN(const AudioStreamBasicDescription *infmt, AudioStreamBasicDescription *outfmt){ *(UInt64 *)&outfmt->mSampleRate = EndianU64_BtoN(*(UInt64 *)&infmt->mSampleRate); outfmt->mFormatID = EndianU32_BtoN(infmt->mFormatID); outfmt->mFormatFlags = EndianU32_BtoN(infmt->mFormatFlags); outfmt->mBytesPerPacket = EndianU32_BtoN(infmt->mBytesPerPacket); outfmt->mFramesPerPacket = EndianU32_BtoN(infmt->mFramesPerPacket); outfmt->mBytesPerFrame = EndianU32_BtoN(infmt->mBytesPerFrame); outfmt->mChannelsPerFrame = EndianU32_BtoN(infmt->mChannelsPerFrame); outfmt->mBitsPerChannel = EndianU32_BtoN(infmt->mBitsPerChannel);}
void CAAudioFileConverter::WriteCAFInfo(){ FSRef fsref; AudioFileID afid = 0; CAFSourceInfo info; UInt32 size; try { XThrowIfError(FSPathMakeRef((UInt8 *)mParams.input.filePath, &fsref, NULL), "couldn't locate input file"); XThrowIfError(AudioFileOpen(&fsref, fsRdPerm, 0, &afid), "couldn't open input file"); size = sizeof(AudioFileTypeID); XThrowIfError(AudioFileGetProperty(afid, kAudioFilePropertyFileFormat, &size, &info.filetype), "couldn't get input file's format"); AudioFileClose(afid); afid = 0; XThrowIfError(FSPathMakeRef((UInt8 *)mOutName, &fsref, NULL), "couldn't locate output file"); XThrowIfError(AudioFileOpen(&fsref, fsRdWrPerm, 0, &afid), "couldn't open output file"); const char *srcFilename = strrchr(mParams.input.filePath, '/'); if (srcFilename++ == NULL) srcFilename = mParams.input.filePath; ASBD_NtoB(&mSrcFormat, (AudioStreamBasicDescription *)info.asbd); int namelen = std::min(kMaxFilename-1, (int)strlen(srcFilename)); memcpy(info.filename, srcFilename, namelen); info.filename[namelen++] = 0; info.filetype = EndianU32_NtoB(info.filetype); XThrowIfError(AudioFileSetUserData(afid, 'srcI', 0, offsetof(CAFSourceInfo, filename) + namelen, &info), "couldn't set CAF file's source info chunk"); AudioFileClose(afid); } catch (...) { if (afid) AudioFileClose(afid); throw; }}
void CAAudioFileConverter::ReadCAFInfo(){ FSRef fsref; AudioFileID afid = 0; CAFSourceInfo info; UInt32 size; OSStatus err; try { XThrowIfError(FSPathMakeRef((UInt8 *)mParams.input.filePath, &fsref, NULL), "couldn't locate input file"); XThrowIfError(AudioFileOpen(&fsref, fsRdPerm, 0, &afid), "couldn't open input file"); size = sizeof(AudioFileTypeID); XThrowIfError(AudioFileGetProperty(afid, kAudioFilePropertyFileFormat, &size, &info.filetype), "couldn't get input file's format"); if (info.filetype == kAudioFileCAFType) { size = sizeof(info); err = AudioFileGetUserData(afid, 'srcI', 0, &size, &info); if (!err) { // restore the following from the original file info: // filetype // data format // filename AudioStreamBasicDescription destfmt; ASBD_BtoN((AudioStreamBasicDescription *)info.asbd, &destfmt); mParams.output.dataFormat = destfmt; mParams.output.fileType = EndianU32_BtoN(info.filetype); if (mParams.output.filePath == NULL) { int len = strlen(mParams.input.filePath) + strlen(info.filename) + 2; char *newname = (char *)malloc(len); // $$$ leaked const char *dir = dirname(mParams.input.filePath); if (dir && (dir[0] !='.' && dir[1] != '/')) sprintf(newname, "%s/%s", dir, info.filename); else strcpy(newname, info.filename); mParams.output.filePath = newname; mParams.flags = (mParams.flags & ~kOpt_OverwriteOutputFile) | kOpt_NoSanitizeOutputFormat; } } } AudioFileClose(afid); } catch (...) { if (afid) AudioFileClose(afid); throw; }}