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.*//*============================================================================= Interleaver.cpp =============================================================================*/
#include "CAAudioFile.h"#include "CAXException.h"#include <unistd.h>#include "CAChannelLayouts.h"#include "CAFilePathUtils.h"
static void usage(){ fprintf(stderr, "Usage:\n" "%s [option...] input_file... -o output_file\n\n" "Options: (may appear before or after arguments)\n" " { -l | --channellayout } layout_tag\n" " layout_tag: name of a constant from CoreAudioTypes.h\n" " (prefix \"kAudioChannelLayoutTag_\" may be omitted)\n", getprogname() ); exit(1);}
void Interleave(int nInputs, const char *infilenames[], const char *outfilename, const CAAudioChannelLayout *layout){ const UInt32 kBufferSizeFrames = 0x8000; const UInt32 kBufferSizeBytes = kBufferSizeFrames * sizeof(Float32); class FileAndBuffer : public CAAudioFile { public: FileAndBuffer() : mBuf(NULL), mPtrs(NULL) { } ~FileAndBuffer() { delete mBuf; delete mPtrs; } CABufferList * mBuf; CABufferList * mPtrs; }; FileAndBuffer *infiles = new FileAndBuffer[nInputs], *file; FileAndBuffer outfile; int i; UInt32 outputChannels = 0; double sampleRate = 0.; UInt32 maxBitDepth = 0; CAStreamBasicDescription clientFormat; bool outFileCreated = false; try { // set up input files for (i = 0; i < nInputs; ++i) { file = &infiles[i]; file->Open(infilenames[i]); const CAStreamBasicDescription &fmt = file->GetFileDataFormat(); //fmt.PrintFormat(stdout, "", "input file"); XThrowIf(fmt.mFormatID != kAudioFormatLinearPCM, -1, "input files must be PCM"); outputChannels += fmt.mChannelsPerFrame; if (sampleRate == 0.) sampleRate = fmt.mSampleRate; else XThrowIf(fmt.mSampleRate != sampleRate, -1, "input files must have the same sample rate"); if (fmt.mBitsPerChannel > maxBitDepth) maxBitDepth = fmt.mBitsPerChannel; clientFormat.mSampleRate = sampleRate; clientFormat.SetCanonical(fmt.mChannelsPerFrame, false); // deinterleaved file->SetClientFormat(clientFormat, NULL); file->mBuf = CABufferList::New("readbuf", clientFormat); file->mBuf->AllocateBuffers(kBufferSizeBytes); file->mPtrs = CABufferList::New("readptrs", clientFormat); //clientFormat.PrintFormat(stdout, "", "input client"); } if (layout != NULL) { if (AudioChannelLayoutTag_GetNumberOfChannels(layout->Tag()) != outputChannels) { fprintf(stderr, "Channel layout tag '%s' is inappropriate for %lu channels of audio -- aborting\n", CAChannelLayouts::ConstantToString(layout->Tag()), outputChannels); exit(2); } }
// prepare output file format CAStreamBasicDescription outfmt; outfmt.mSampleRate = sampleRate; outfmt.mFormatID = kAudioFormatLinearPCM; outfmt.mFormatFlags = kLinearPCMFormatFlagIsBigEndian | kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked; outfmt.mBitsPerChannel = maxBitDepth; outfmt.mChannelsPerFrame = outputChannels; outfmt.mBytesPerPacket = outfmt.mBytesPerFrame = outputChannels * (maxBitDepth >> 3); outfmt.mFramesPerPacket = 1; //outfmt.PrintFormat(stdout, "", "output file"); unlink(outfilename); FSRef parentDir; CFStringRef outName; XThrowIfError(PosixPathToParentFSRefAndName(outfilename, parentDir, outName), "Couldn't locate output directory"); outfile.CreateNew(parentDir, outName, kAudioFileAIFFType, outfmt, layout ? &layout->Layout() : NULL); outFileCreated = true; // create the output file and buffers clientFormat.mSampleRate = sampleRate; clientFormat.SetCanonical(outputChannels, false); outfile.SetClientFormat(clientFormat, NULL); //clientFormat.PrintFormat(stdout, "", "output client");
outfile.mPtrs = CABufferList::New("writeptrs", clientFormat);
AudioBufferList &writebufs = outfile.mPtrs->GetModifiableBufferList(); int outbuf = 0; for (i = 0; i < nInputs; ++i) { file = &infiles[i]; const CABufferList *bl = file->mBuf; const AudioBufferList &readbufs = bl->GetBufferList(); memcpy(&writebufs.mBuffers[outbuf], &readbufs.mBuffers[0], readbufs.mNumberBuffers * sizeof(AudioBuffer)); outbuf += readbufs.mNumberBuffers; } while (true) { UInt32 maxFramesRead = 0; UInt32 nframes; for (i = 0; i < nInputs; ++i) { file = &infiles[i]; file->mPtrs->SetFrom(file->mBuf); nframes = kBufferSizeFrames; AudioBufferList &readbufs = file->mPtrs->GetModifiableBufferList(); file->Read(nframes, &readbufs); //CAShowAudioBufferList(&readbufs, 8, 0); if (nframes > maxFramesRead) maxFramesRead = nframes; if (nframes < kBufferSizeFrames) file->mPtrs->PadWithZeroes(kBufferSizeBytes); } if (maxFramesRead == 0) break;
if (maxFramesRead < kBufferSizeFrames) outfile.mPtrs->SetNumBytes(maxFramesRead * sizeof(Float32)); //CAShowAudioBufferList(&writebufs, 8, 0); outfile.Write(maxFramesRead, &writebufs); if (maxFramesRead < kBufferSizeFrames) break; } } catch (...) { if (outFileCreated) unlink(outfilename); delete[] infiles; throw; } outfile.Close(); // input files are closed from destructors delete[] infiles;}
static void MissingArgument(){ fprintf(stderr, "missing argument\n\n"); usage();}
int main(int argc, const char *argv[]){ int nins = 0; static const int MAX_INPUT_FILES = 32; const char *infiles[MAX_INPUT_FILES]; const char *outfile = NULL; UInt32 layoutTag = 0;
for (int i = 1; i < argc; ++i) { const char *arg = argv[i]; if (arg[0] != '-') { if (nins >= MAX_INPUT_FILES) { fprintf(stderr, "too many input files\n\n"); usage(); } infiles[nins++] = arg; } else { arg += 1; if (arg[0] == 'o') { if (++i == argc) MissingArgument(); outfile = argv[i]; } else if (arg[0] == 'l' || !strcmp(arg, "-channellayout")) { if (++i == argc) MissingArgument(); layoutTag = CAChannelLayouts::StringToConstant(argv[i]); if (layoutTag == CAChannelLayouts::kInvalidTag) { fprintf(stderr, "unknown channel layout tag: %s\n\n", argv[i]); usage(); } } else { fprintf(stderr, "unknown argument: %s\n\n", arg - 1); usage(); } } } if (nins < 2 || outfile == NULL) usage(); try { if (layoutTag != 0) { CAAudioChannelLayout layout = CAAudioChannelLayout(layoutTag); Interleave(nins, infiles, outfile, &layout); } else Interleave(nins, infiles, outfile, NULL); } catch (CAXException &e) { char buf[256]; fprintf(stderr, "Error: %s (%s)\n", e.mOperation, CAXException::FormatError(buf, e.mError)); return 1; } catch (...) { fprintf(stderr, "An unknown error occurred\n"); return 1; } return 0;}