df80b042220e1fcc0f3ff8af654d09d79c627bfd
[Faustine.git] / interpretor / libsndfile-1.0.25 / programs / sndfile-deinterleave.c
1 /*
2 ** Copyright (C) 2009-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
3 **
4 ** All rights reserved.
5 **
6 ** Redistribution and use in source and binary forms, with or without
7 ** modification, are permitted provided that the following conditions are
8 ** met:
9 **
10 ** * Redistributions of source code must retain the above copyright
11 ** notice, this list of conditions and the following disclaimer.
12 ** * Redistributions in binary form must reproduce the above copyright
13 ** notice, this list of conditions and the following disclaimer in
14 ** the documentation and/or other materials provided with the
15 ** distribution.
16 ** * Neither the author nor the names of any contributors may be used
17 ** to endorse or promote products derived from this software without
18 ** specific prior written permission.
19 **
20 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 ** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 ** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 ** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 ** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 ** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
27 ** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
28 ** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
29 ** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
30 ** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <sndfile.h>
37
38 #include "common.h"
39
40 #define BUFFER_LEN 4096
41 #define MAX_CHANNELS 16
42
43
44 typedef struct
45 { SNDFILE * infile ;
46 SNDFILE * outfile [MAX_CHANNELS] ;
47
48 union
49 { double d [MAX_CHANNELS * BUFFER_LEN] ;
50 int i [MAX_CHANNELS * BUFFER_LEN] ;
51 } din ;
52
53 union
54 { double d [BUFFER_LEN] ;
55 int i [BUFFER_LEN] ;
56 } dout ;
57
58 int channels ;
59 } STATE ;
60
61 static void usage_exit (void) ;
62
63 static void deinterleave_int (STATE * state) ;
64 static void deinterleave_double (STATE * state) ;
65
66 int
67 main (int argc, char **argv)
68 { STATE state ;
69 SF_INFO sfinfo ;
70 char pathname [512], ext [32], *cptr ;
71 int ch, double_split ;
72
73 if (argc != 2)
74 { if (argc != 1)
75 puts ("\nError : need a single input file.\n") ;
76 usage_exit () ;
77 } ;
78
79 memset (&state, 0, sizeof (state)) ;
80 memset (&sfinfo, 0, sizeof (sfinfo)) ;
81
82 if ((state.infile = sf_open (argv [1], SFM_READ, &sfinfo)) == NULL)
83 { printf ("\nError : Not able to open input file '%s'\n%s\n", argv [1], sf_strerror (NULL)) ;
84 exit (1) ;
85 } ;
86
87 if (sfinfo.channels < 2)
88 { printf ("\nError : Input file '%s' only has one channel.\n", argv [1]) ;
89 exit (1) ;
90 } ;
91
92 state.channels = sfinfo.channels ;
93 sfinfo.channels = 1 ;
94
95 snprintf (pathname, sizeof (pathname), "%s", argv [1]) ;
96 if ((cptr = strrchr (pathname, '.')) == NULL)
97 ext [0] = 0 ;
98 else
99 { snprintf (ext, sizeof (ext), "%s", cptr) ;
100 cptr [0] = 0 ;
101 } ;
102
103 printf ("Input file : %s\n", pathname) ;
104 puts ("Output files :") ;
105
106 for (ch = 0 ; ch < state.channels ; ch++)
107 { char filename [520] ;
108
109 snprintf (filename, sizeof (filename), "%s_%02d%s", pathname, ch, ext) ;
110
111 if ((state.outfile [ch] = sf_open (filename, SFM_WRITE, &sfinfo)) == NULL)
112 { printf ("Not able to open output file '%s'\n%s\n", filename, sf_strerror (NULL)) ;
113 exit (1) ;
114 } ;
115
116 printf (" %s\n", filename) ;
117 } ;
118
119 switch (sfinfo.format & SF_FORMAT_SUBMASK)
120 { case SF_FORMAT_FLOAT :
121 case SF_FORMAT_DOUBLE :
122 case SF_FORMAT_VORBIS :
123 double_split = 1 ;
124 break ;
125
126 default :
127 double_split = 0 ;
128 break ;
129 } ;
130
131 if (double_split)
132 deinterleave_double (&state) ;
133 else
134 deinterleave_int (&state) ;
135
136 sf_close (state.infile) ;
137 for (ch = 0 ; ch < MAX_CHANNELS ; ch++)
138 if (state.outfile [ch] != NULL)
139 sf_close (state.outfile [ch]) ;
140
141 return 0 ;
142 } /* main */
143
144 /*------------------------------------------------------------------------------
145 */
146
147 static void
148 usage_exit (void)
149 { puts ("\nUsage : sndfile-deinterleave <filename>\n") ;
150 puts (
151 "Split a mutli-channel file into a set of mono files.\n"
152 "\n"
153 "If the input file is named 'a.wav', the output files will be named\n"
154 "a_00.wav, a_01.wav and so on.\n"
155 ) ;
156 printf ("Using %s.\n\n", sf_version_string ()) ;
157 exit (0) ;
158 } /* usage_exit */
159
160 static void
161 deinterleave_int (STATE * state)
162 { int read_len ;
163 int ch, k ;
164
165 do
166 { read_len = sf_readf_int (state->infile, state->din.i, BUFFER_LEN) ;
167
168 for (ch = 0 ; ch < state->channels ; ch ++)
169 { for (k = 0 ; k < read_len ; k++)
170 state->dout.i [k] = state->din.i [k * state->channels + ch] ;
171 sf_write_int (state->outfile [ch], state->dout.i, read_len) ;
172 } ;
173 }
174 while (read_len > 0) ;
175
176 } /* deinterleave_int */
177
178 static void
179 deinterleave_double (STATE * state)
180 { int read_len ;
181 int ch, k ;
182
183 do
184 { read_len = sf_readf_double (state->infile, state->din.d, BUFFER_LEN) ;
185
186 for (ch = 0 ; ch < state->channels ; ch ++)
187 { for (k = 0 ; k < read_len ; k++)
188 state->dout.d [k] = state->din.d [k * state->channels + ch] ;
189 sf_write_double (state->outfile [ch], state->dout.d, read_len) ;
190 } ;
191 }
192 while (read_len > 0) ;
193
194 } /* deinterleave_double */