source: src/io/sink_apple_audio.c @ dd5a052

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since dd5a052 was dd5a052, checked in by Paul Brossier <piem@piem.org>, 8 years ago

src/io/sink_apple_audio.c: only compile on apple

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File size: 4.4 KB
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1/*
2  Copyright (C) 2012 Paul Brossier <piem@aubio.org>
3
4  This file is part of aubio.
5
6  aubio is free software: you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation, either version 3 of the License, or
9  (at your option) any later version.
10
11  aubio is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  GNU General Public License for more details.
15
16  You should have received a copy of the GNU General Public License
17  along with aubio.  If not, see <http://www.gnu.org/licenses/>.
18
19*/
20
21#include "config.h"
22
23#ifdef __APPLE__
24
25#include "aubio_priv.h"
26#include "fvec.h"
27#include "io/sink_apple_audio.h"
28
29// CFURLRef, CFURLCreateWithFileSystemPath, ...
30#include <CoreFoundation/CoreFoundation.h>
31// ExtAudioFileRef, AudioStreamBasicDescription, AudioBufferList, ...
32#include <AudioToolbox/AudioToolbox.h>
33
34#define FLOAT_TO_SHORT(x) (short)(x * 32768)
35
36extern int createAubioBufferList(AudioBufferList *bufferList, int channels, int segmentSize);
37extern void freeAudioBufferList(AudioBufferList *bufferList);
38extern CFURLRef getURLFromPath(const char * path);
39
40#define MAX_SIZE 4096 // the maximum number of frames that can be written at a time
41
42struct _aubio_sink_apple_audio_t { 
43  uint_t samplerate;
44  uint_t channels;
45  char_t *path;
46
47  uint_t max_frames;
48
49  AudioBufferList bufferList;
50  ExtAudioFileRef audioFile;
51};
52
53aubio_sink_apple_audio_t * new_aubio_sink_apple_audio(char_t * uri, uint_t samplerate) {
54  aubio_sink_apple_audio_t * s = AUBIO_NEW(aubio_sink_apple_audio_t);
55  s->samplerate;
56  s->channels = 1;
57  s->path = uri;
58  s->max_frames = MAX_SIZE;
59
60  AudioStreamBasicDescription clientFormat;
61  UInt32 propSize = sizeof(clientFormat);
62  memset(&clientFormat, 0, sizeof(AudioStreamBasicDescription));
63  clientFormat.mFormatID         = kAudioFormatLinearPCM;
64  clientFormat.mSampleRate       = (Float64)(s->samplerate);
65  clientFormat.mFormatFlags      = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
66  clientFormat.mChannelsPerFrame = s->channels;
67  clientFormat.mBitsPerChannel   = sizeof(short) * 8;
68  clientFormat.mFramesPerPacket  = 1;
69  clientFormat.mBytesPerFrame    = clientFormat.mBitsPerChannel * clientFormat.mChannelsPerFrame / 8;
70  clientFormat.mBytesPerPacket   = clientFormat.mFramesPerPacket * clientFormat.mBytesPerFrame;
71  clientFormat.mReserved         = 0;
72
73  AudioFileTypeID fileType = kAudioFileWAVEType;
74  CFURLRef fileURL = getURLFromPath(uri);
75  bool overwrite = true;
76  OSStatus err = noErr;
77  err = ExtAudioFileCreateWithURL(fileURL, fileType, &clientFormat, NULL,
78     overwrite ? kAudioFileFlags_EraseFile : 0, &s->audioFile);
79  if (err) {
80    AUBIO_ERR("error when trying to access %s, in ExtAudioFileOpenURL, %d\n", s->path, (int)err);
81    goto beach;
82  }
83  if (createAubioBufferList(&s->bufferList, s->channels, s->max_frames * s->channels)) {
84    AUBIO_ERR("error when creating buffer list for %s, out of memory? \n", s->path);
85    goto beach;
86  }
87  return s;
88
89beach:
90  AUBIO_FREE(s);
91  return NULL;
92}
93
94void aubio_sink_apple_audio_do(aubio_sink_apple_audio_t * s, fvec_t * write_data, uint_t write) {
95  OSStatus err = noErr;
96  UInt32 c, v;
97  bool async = true;
98  short *data = (short*)s->bufferList.mBuffers[0].mData;
99  if (write > s->max_frames) { 
100    write = s->max_frames;
101    AUBIO_WRN("trying to write %d frames, but only %d can be written at a time",
102      write, s->max_frames);
103  }
104  smpl_t *buf = write_data->data;
105
106  if (buf) {
107      for (c = 0; c < s->channels; c++) {
108          for (v = 0; v < write; v++) {
109              data[v * s->channels + c] =
110                  FLOAT_TO_SHORT(buf[ v * s->channels + c]);
111          }
112      }
113  }
114  if (async) {
115    err = ExtAudioFileWriteAsync(s->audioFile, write, &s->bufferList);
116    if (err) { AUBIO_ERROR("error in ExtAudioFileWriteAsync, %d\n", (int)err); }
117  } else {
118    err = ExtAudioFileWrite(s->audioFile, write, &s->bufferList);
119    if (err) { AUBIO_ERROR("error in ExtAudioFileWrite, %d\n", (int)err); }
120  }
121  return;
122}
123
124void del_aubio_sink_apple_audio(aubio_sink_apple_audio_t * s) {
125  OSStatus err = noErr;
126  if (!s || !s->audioFile) { return; }
127  err = ExtAudioFileDispose(s->audioFile);
128  if (err) AUBIO_ERROR("error in ExtAudioFileDispose, %d\n", (int)err);
129  s->audioFile = NULL;
130  freeAudioBufferList(&s->bufferList);
131  AUBIO_FREE(s);
132  return;
133}
134
135#endif /* __APPLE__ */
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