ref: 9d123e9bd14656c82e15e1dd2b0df2a92bee7720
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 "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;
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);
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->path = path;
s->samplerate = samplerate;
s->block_size = block_size;
s->channels = 1;
OSStatus err = noErr;
UInt32 propSize;
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;
// 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;}
// set the client format description
err = ExtAudioFileSetProperty(s->audioFile, kExtAudioFileProperty_ClientDataFormat,
propSize, &clientFormat);
if (err) { AUBIO_ERROR("error in ExtAudioFileSetProperty, %d\n", (int)err); goto beach;}
#if 0
// 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
// compute the size of the segments needed to read the input file
UInt32 samples = s->block_size * clientFormat.mChannelsPerFrame;
Float64 rateRatio = clientFormat.mSampleRate / fileFormat.mSampleRate;
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 %0.2fHz to %0.2fHz\n", s->path, fileFormat.mSampleRate, clientFormat.mSampleRate);
} 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)) err = -1;
return s;
beach:
AUBIO_FREE(s);
return NULL;
}
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, %d\n", (int)err); goto beach;}
smpl_t *buf = read_to->data;
short *data = (short*)s->bufferList.mBuffers[0].mData;
if (buf) {
for (c = 0; c < s->channels; c++) {
for (v = 0; v < s->block_size; v++) {
if (v < loadedPackets) {
buf[v * s->channels + c] =
SHORT_TO_FLOAT(data[ v * s->channels + c]);
} else {
buf[v * s->channels + c] = 0.f;
}
}
}
}
//if (loadedPackets < s->block_size) return EOF;
*read = (uint_t)loadedPackets;
return;
beach:
*read = 0;
return;
}
void del_aubio_source_apple_audio(aubio_source_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__ */