1 /*
2 exportAudio.c
3 code for writing audio files
4 Depends on:
5 exportAudio.h
6 BinauralBeat.h
7
8 Copyright (C) 2008 Bret Logan
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25 #include <sndfile.h>
26 #include "BinauralBeat.h"
27
28 ////////////////////////////////////
29 //Typical major format types might be:
30 //SF_FORMAT_WAV
31 //SF_FORMAT_FLAC
32 //SF_FORMAT_AIFF
33 //SF_FORMAT_AU
34 //SF_FORMAT_RAW
35 //SF_FORMAT_OGG
36 //But the SubTypes can only be one of these:
37 //SF_FORMAT_PCM_16
38 //SF_FORMAT_VORBIS [only used with SF_FORMAT_OGG majortype]
39
exportAudioToFile(char * filename,int format)40 int exportAudioToFile (char *filename, int format)
41 {
42 const int EA_FRAMES_TO_WRITE = 16;
43 const int EA_BYTES_TO_FILL = EA_FRAMES_TO_WRITE * 4;
44 SNDFILE *file;
45 SF_INFO sfinfo;
46 int *buffer[EA_FRAMES_TO_WRITE];
47
48 sfinfo.samplerate = BB_AUDIOSAMPLERATE;
49 sfinfo.frames =
50 (unsigned int) (BB_Loops * BB_TotalDuration * BB_AUDIOSAMPLERATE + 0.5);
51 sfinfo.channels = 2;
52 sfinfo.format = format;
53 sfinfo.sections = 1;
54 sfinfo.seekable = 0;
55
56 if (!(file = sf_open (filename, SFM_WRITE, &sfinfo)))
57 {
58 printf ("Unexpected Error : Not able to write that format, sorry.\n");
59 return 1;
60 };
61
62 BB_WriteStopFlag = 0;
63
64 BB_Reset (); //make sure we start at absolute beginning
65
66 while (!(BB_InfoFlag & BB_COMPLETED) && FALSE == BB_WriteStopFlag)
67 {
68 BB_MainLoop (buffer, EA_BYTES_TO_FILL);
69 sf_writef_short (file, (short *) buffer, EA_FRAMES_TO_WRITE);
70 }
71
72 sf_close (file);
73 return 0;
74 }
75