ref: 9d123e9bd14656c82e15e1dd2b0df2a92bee7720
dir: /src/io/sink_apple_audio.c/
/* Copyright (C) 2012 Paul Brossier <piem@aubio.org> This file is part of aubio. aubio is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. aubio is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with aubio. If not, see <http://www.gnu.org/licenses/>. */ #include "config.h" #ifdef __APPLE__ #include "aubio_priv.h" #include "fvec.h" #include "io/sink_apple_audio.h" // CFURLRef, CFURLCreateWithFileSystemPath, ... #include <CoreFoundation/CoreFoundation.h> // ExtAudioFileRef, AudioStreamBasicDescription, AudioBufferList, ... #include <AudioToolbox/AudioToolbox.h> #define FLOAT_TO_SHORT(x) (short)(x * 32768) extern int createAubioBufferList(AudioBufferList *bufferList, int channels, int segmentSize); extern void freeAudioBufferList(AudioBufferList *bufferList); extern CFURLRef getURLFromPath(const char * path); #define MAX_SIZE 4096 // the maximum number of frames that can be written at a time struct _aubio_sink_apple_audio_t { uint_t samplerate; uint_t channels; char_t *path; uint_t max_frames; AudioBufferList bufferList; ExtAudioFileRef audioFile; }; aubio_sink_apple_audio_t * new_aubio_sink_apple_audio(char_t * uri, uint_t samplerate) { aubio_sink_apple_audio_t * s = AUBIO_NEW(aubio_sink_apple_audio_t); s->samplerate; s->channels = 1; s->path = uri; s->max_frames = MAX_SIZE; AudioStreamBasicDescription clientFormat; UInt32 propSize = sizeof(clientFormat); memset(&clientFormat, 0, sizeof(AudioStreamBasicDescription)); clientFormat.mFormatID = kAudioFormatLinearPCM; clientFormat.mSampleRate = (Float64)(s->samplerate); clientFormat.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked; clientFormat.mChannelsPerFrame = s->channels; clientFormat.mBitsPerChannel = sizeof(short) * 8; clientFormat.mFramesPerPacket = 1; clientFormat.mBytesPerFrame = clientFormat.mBitsPerChannel * clientFormat.mChannelsPerFrame / 8; clientFormat.mBytesPerPacket = clientFormat.mFramesPerPacket * clientFormat.mBytesPerFrame; clientFormat.mReserved = 0; AudioFileTypeID fileType = kAudioFileWAVEType; CFURLRef fileURL = getURLFromPath(uri); bool overwrite = true; OSStatus err = noErr; err = ExtAudioFileCreateWithURL(fileURL, fileType, &clientFormat, NULL, overwrite ? kAudioFileFlags_EraseFile : 0, &s->audioFile); if (err) { AUBIO_ERR("error when trying to access %s, in ExtAudioFileOpenURL, %d\n", s->path, (int)err); goto beach; } if (createAubioBufferList(&s->bufferList, s->channels, s->max_frames * s->channels)) { AUBIO_ERR("error when creating buffer list for %s, out of memory? \n", s->path); goto beach; } return s; beach: AUBIO_FREE(s); return NULL; } void aubio_sink_apple_audio_do(aubio_sink_apple_audio_t * s, fvec_t * write_data, uint_t write) { OSStatus err = noErr; UInt32 c, v; bool async = true; short *data = (short*)s->bufferList.mBuffers[0].mData; if (write > s->max_frames) { write = s->max_frames; AUBIO_WRN("trying to write %d frames, but only %d can be written at a time", write, s->max_frames); } smpl_t *buf = write_data->data; if (buf) { for (c = 0; c < s->channels; c++) { for (v = 0; v < write; v++) { data[v * s->channels + c] = FLOAT_TO_SHORT(buf[ v * s->channels + c]); } } } if (async) { err = ExtAudioFileWriteAsync(s->audioFile, write, &s->bufferList); if (err) { AUBIO_ERROR("error in ExtAudioFileWriteAsync, %d\n", (int)err); } } else { err = ExtAudioFileWrite(s->audioFile, write, &s->bufferList); if (err) { AUBIO_ERROR("error in ExtAudioFileWrite, %d\n", (int)err); } } return; } void del_aubio_sink_apple_audio(aubio_sink_apple_audio_t * s) { OSStatus err = noErr; if (!s || !s->audioFile) { return; } err = ExtAudioFileDispose(s->audioFile); if (err) AUBIO_ERROR("error in ExtAudioFileDispose, %d\n", (int)err); s->audioFile = NULL; freeAudioBufferList(&s->bufferList); AUBIO_FREE(s); return; } #endif /* __APPLE__ */