ref: db120acffbf8fa0cc71e8bc8fba056c60a5f9ec1
dir: /src/io/source_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/>. */ #ifdef __APPLE__ #include "config.h" #include "aubio_priv.h" #include "fvec.h" #include "fmat.h" #include "io/source_apple_audio.h" // ExtAudioFileRef, AudioStreamBasicDescription, AudioBufferList, ... #include <AudioToolbox/AudioToolbox.h> #define RT_BYTE1( a ) ( (a) & 0xff ) #define RT_BYTE2( a ) ( ((a) >> 8) & 0xff ) #define RT_BYTE3( a ) ( ((a) >> 16) & 0xff ) #define RT_BYTE4( a ) ( ((a) >> 24) & 0xff ) #define SHORT_TO_FLOAT(x) (smpl_t)(x * 3.0517578125e-05) struct _aubio_source_apple_audio_t { uint_t channels; uint_t samplerate; //< requested samplerate uint_t source_samplerate; //< actual source samplerate uint_t block_size; char_t *path; ExtAudioFileRef audioFile; AudioBufferList bufferList; }; extern int createAubioBufferList(AudioBufferList *bufferList, int channels, int segmentSize); extern void freeAudioBufferList(AudioBufferList *bufferList); extern CFURLRef getURLFromPath(const char * path); uint_t aubio_source_apple_audio_open (aubio_source_apple_audio_t *s, char_t * path); aubio_source_apple_audio_t * new_aubio_source_apple_audio(char_t * path, uint_t samplerate, uint_t block_size) { aubio_source_apple_audio_t * s = AUBIO_NEW(aubio_source_apple_audio_t); s->block_size = block_size; s->samplerate = samplerate; if ( aubio_source_apple_audio_open ( s, path ) ) { goto beach; } return s; beach: AUBIO_FREE(s); return NULL; } uint_t aubio_source_apple_audio_open (aubio_source_apple_audio_t *s, char_t * path) { OSStatus err = noErr; UInt32 propSize; s->path = path; // open the resource url CFURLRef fileURL = getURLFromPath(path); err = ExtAudioFileOpenURL(fileURL, &s->audioFile); if (err) { AUBIO_ERR("error when trying to access %s, in ExtAudioFileOpenURL, %d\n", s->path, (int)err); goto beach;} // create an empty AudioStreamBasicDescription AudioStreamBasicDescription fileFormat; propSize = sizeof(fileFormat); memset(&fileFormat, 0, sizeof(AudioStreamBasicDescription)); // fill it with the file description err = ExtAudioFileGetProperty(s->audioFile, kExtAudioFileProperty_FileDataFormat, &propSize, &fileFormat); if (err) { AUBIO_ERROR("error in ExtAudioFileGetProperty, %d\n", (int)err); goto beach;} if (s->samplerate == 0) { s->samplerate = fileFormat.mSampleRate; //AUBIO_DBG("sampling rate set to 0, automagically adjusting to %d\n", samplerate); } s->source_samplerate = fileFormat.mSampleRate; s->channels = fileFormat.mChannelsPerFrame; AudioStreamBasicDescription clientFormat; 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; // set the client format description err = ExtAudioFileSetProperty(s->audioFile, kExtAudioFileProperty_ClientDataFormat, propSize, &clientFormat); if (err) { AUBIO_ERROR("error in ExtAudioFileSetProperty, %d\n", (int)err); #if 1 // print client and format descriptions AUBIO_DBG("Opened %s\n", s->path); AUBIO_DBG("file/client Format.mFormatID: : %3c%c%c%c / %c%c%c%c\n", (int)RT_BYTE4(fileFormat.mFormatID), (int)RT_BYTE3(fileFormat.mFormatID), (int)RT_BYTE2(fileFormat.mFormatID), (int)RT_BYTE1(fileFormat.mFormatID), (int)RT_BYTE4(clientFormat.mFormatID), (int)RT_BYTE3(clientFormat.mFormatID), (int)RT_BYTE2(clientFormat.mFormatID), (int)RT_BYTE1(clientFormat.mFormatID) ); AUBIO_DBG("file/client Format.mSampleRate : %6.0f / %.0f\n", fileFormat.mSampleRate , clientFormat.mSampleRate); AUBIO_DBG("file/client Format.mFormatFlags : %6d / %d\n", (int)fileFormat.mFormatFlags , (int)clientFormat.mFormatFlags); AUBIO_DBG("file/client Format.mChannelsPerFrame : %6d / %d\n", (int)fileFormat.mChannelsPerFrame, (int)clientFormat.mChannelsPerFrame); AUBIO_DBG("file/client Format.mBitsPerChannel : %6d / %d\n", (int)fileFormat.mBitsPerChannel , (int)clientFormat.mBitsPerChannel); AUBIO_DBG("file/client Format.mFramesPerPacket : %6d / %d\n", (int)fileFormat.mFramesPerPacket , (int)clientFormat.mFramesPerPacket); AUBIO_DBG("file/client Format.mBytesPerFrame : %6d / %d\n", (int)fileFormat.mBytesPerFrame , (int)clientFormat.mBytesPerFrame); AUBIO_DBG("file/client Format.mBytesPerPacket : %6d / %d\n", (int)fileFormat.mBytesPerPacket , (int)clientFormat.mBytesPerPacket); AUBIO_DBG("file/client Format.mReserved : %6d / %d\n", (int)fileFormat.mReserved , (int)clientFormat.mReserved); #endif goto beach; } // compute the size of the segments needed to read the input file UInt32 samples = s->block_size * s->channels; Float64 rateRatio = s->samplerate / s->source_samplerate; uint_t segmentSize= (uint_t)(samples * rateRatio + .5); if (rateRatio < 1.) { segmentSize = (uint_t)(samples / rateRatio + .5); } else if (rateRatio > 1.) { AUBIO_WRN("up-sampling %s from %0dHz to %0dHz\n", s->path, s->source_samplerate, s->samplerate); } else { assert ( segmentSize == samples ); //AUBIO_DBG("not resampling, segmentSize %d, block_size %d\n", segmentSize, s->block_size); } // allocate the AudioBufferList if (createAubioBufferList(&s->bufferList, s->channels, segmentSize)) { AUBIO_ERR("source_apple_audio: failed creating bufferList\n"); goto beach; } beach: return err; } void aubio_source_apple_audio_do(aubio_source_apple_audio_t *s, fvec_t * read_to, uint_t * read) { UInt32 c, v, loadedPackets = s->block_size; OSStatus err = ExtAudioFileRead(s->audioFile, &loadedPackets, &s->bufferList); if (err) { AUBIO_ERROR("error in ExtAudioFileRead %s %d\n", s->path, (int)err); goto beach;} short *data = (short*)s->bufferList.mBuffers[0].mData; smpl_t *buf = read_to->data; for (v = 0; v < loadedPackets; v++) { buf[v] = 0.; for (c = 0; c < s->channels; c++) { buf[v] += SHORT_TO_FLOAT(data[ v * s->channels + c]); } buf[v] /= (smpl_t)s->channels; } // short read, fill with zeros if (loadedPackets < s->block_size) { for (v = loadedPackets; v < s->block_size; v++) { buf[v] = 0.; } } *read = (uint_t)loadedPackets; return; beach: *read = 0; return; } void aubio_source_apple_audio_do_multi(aubio_source_apple_audio_t *s, fmat_t * read_to, uint_t * read) { UInt32 c, v, loadedPackets = s->block_size; OSStatus err = ExtAudioFileRead(s->audioFile, &loadedPackets, &s->bufferList); if (err) { AUBIO_ERROR("source_apple_audio: error in ExtAudioFileRead, %d\n", (int)err); goto beach;} short *data = (short*)s->bufferList.mBuffers[0].mData; smpl_t **buf = read_to->data; for (v = 0; v < loadedPackets; v++) { for (c = 0; c < s->channels; c++) { buf[c][v] = SHORT_TO_FLOAT(data[ v * s->channels + c]); } } // short read, fill with zeros if (loadedPackets < s->block_size) { for (v = loadedPackets; v < s->block_size; v++) { for (c = 0; c < s->channels; c++) { buf[c][v] = 0.; } } } *read = (uint_t)loadedPackets; return; beach: *read = 0; return; } uint_t aubio_source_apple_audio_close (aubio_source_apple_audio_t *s) { OSStatus err = noErr; if (!s || !s->audioFile) { return 1; } err = ExtAudioFileDispose(s->audioFile); if (err) AUBIO_ERROR("error in ExtAudioFileDispose, %d\n", (int)err); s->audioFile = NULL; return err; } void del_aubio_source_apple_audio(aubio_source_apple_audio_t * s){ aubio_source_apple_audio_close (s); freeAudioBufferList(&s->bufferList); AUBIO_FREE(s); return; } uint_t aubio_source_apple_audio_seek (aubio_source_apple_audio_t * s, uint_t pos) { SInt64 resampled_pos = (SInt64)ROUND( pos * s->source_samplerate * 1. / s->samplerate ); OSStatus err = ExtAudioFileSeek(s->audioFile, resampled_pos); if (err) AUBIO_ERROR("source_apple_audio: error in ExtAudioFileSeek (%d)\n", (int)err); return err; } uint_t aubio_source_apple_audio_get_samplerate(aubio_source_apple_audio_t * s) { return s->samplerate; } uint_t aubio_source_apple_audio_get_channels(aubio_source_apple_audio_t * s) { return s->channels; } #endif /* __APPLE__ */