interpretor/libsndfile-1.0.25/programs/sndfile-interleave.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_INPUTS      16
  42
  43
  44 typedef struct
  45 {       SNDFILE * infile [MAX_INPUTS] ;
  46         SNDFILE * outfile ;
  47
  48         union
  49         {       double  d [BUFFER_LEN] ;
  50                 int             i [BUFFER_LEN] ;
  51         } din ;
  52
  53         union
  54
  55         {       double  d [MAX_INPUTS * BUFFER_LEN] ;
  56                 int             i [MAX_INPUTS * BUFFER_LEN] ;
  57         } dout ;
  58
  59         int channels ;
  60 } STATE ;
  61
  62
  63 static void usage_exit (void) ;
  64 static void interleave_int (STATE * state) ;
  65 static void interleave_double (STATE * state) ;
  66
  67
  68 int
  69 main (int argc, char **argv)
  70 {       STATE state ;
  71         SF_INFO sfinfo ;
  72         int k, double_merge = 0 ;
  73
  74         if (argc < 5)
  75         {       if (argc > 1)
  76                         puts ("\nError : need at least 2 input files.") ;
  77                 usage_exit () ;
  78                 } ;
  79
  80         if (strcmp (argv [argc - 2], "-o") != 0)
  81         {       puts ("\nError : second last command line parameter should be '-o'.\n") ;
  82                 usage_exit () ;
  83                 } ;
  84
  85         if (argc - 3 > MAX_INPUTS)
  86         {       printf ("\nError : Cannot handle more than %d input channels.\n\n", MAX_INPUTS) ;
  87                 exit (1) ;
  88                 } ;
  89
  90         memset (&state, 0, sizeof (state)) ;
  91         memset (&sfinfo, 0, sizeof (sfinfo)) ;
  92
  93         for (k = 1 ; k < argc - 2 ; k++)
  94         {
  95                 if ((state.infile [k - 1] = sf_open (argv [k], SFM_READ, &sfinfo)) == NULL)
  96                 {       printf ("\nError : Not able to open input file '%s'\n%s\n", argv [k], sf_strerror (NULL)) ;
  97                         exit (1) ;
  98                         } ;
  99
 100                 if (sfinfo.channels != 1)
 101                 {       printf ("\bError : Input file '%s' should be mono (has %d channels).\n", argv [k], sfinfo.channels) ;
 102                         exit (1) ;
 103                         } ;
 104
 105                 switch (sfinfo.format & SF_FORMAT_SUBMASK)
 106                 {       case SF_FORMAT_FLOAT :
 107                         case SF_FORMAT_DOUBLE :
 108                         case SF_FORMAT_VORBIS :
 109                                 double_merge = 1 ;
 110                                 break ;
 111
 112                         default :
 113                                 break ;
 114                         } ;
 115
 116                 state.channels ++ ;
 117                 } ;
 118
 119         sfinfo.channels = state.channels ;
 120         sfinfo.format = sfe_file_type_of_ext (argv [argc - 1], sfinfo.format) ;
 121
 122         if ((state.outfile = sf_open (argv [argc - 1], SFM_WRITE, &sfinfo)) == NULL)
 123         {       printf ("Not able to open output file '%s'\n%s\n", argv [argc - 1], sf_strerror (NULL)) ;
 124                 exit (1) ;
 125                 } ;
 126
 127         if (double_merge)
 128                 interleave_double (&state) ;
 129         else
 130                 interleave_int (&state) ;
 131
 132         for (k = 0 ; k < MAX_INPUTS ; k++)
 133                 if (state.infile [k] != NULL)
 134                         sf_close (state.infile [k]) ;
 135         sf_close (state.outfile) ;
 136
 137         return 0 ;
 138 } /* main */
 139
 140 /*------------------------------------------------------------------------------
 141 */
 142
 143
 144 static void
 145 usage_exit (void)
 146 {       puts ("\nUsage : sndfile-interleave <input 1> <input 2> ... -o <output file>\n") ;
 147         puts ("Merge two or more mono files into a single multi-channel file.\n") ;
 148         printf ("Using %s.\n\n", sf_version_string ()) ;
 149         exit (0) ;
 150 } /* usage_exit */
 151
 152
 153 static void
 154 interleave_int (STATE * state)
 155 {       int max_read_len, read_len ;
 156         int ch, k ;
 157
 158         do
 159         {       max_read_len = 0 ;
 160
 161                 for (ch = 0 ; ch < state->channels ; ch ++)
 162                 {       read_len = sf_read_int (state->infile [ch], state->din.i, BUFFER_LEN) ;
 163                         if (read_len < BUFFER_LEN)
 164                                 memset (state->din.i + read_len, 0, sizeof (state->din.i [0]) * (BUFFER_LEN - read_len)) ;
 165
 166                         for (k = 0 ; k < read_len ; k++)
 167                                 state->dout.i [k * state->channels + ch] = state->din.i [k] ;
 168
 169                         max_read_len = MAX (max_read_len, read_len) ;
 170                         } ;
 171
 172                 sf_writef_int (state->outfile, state->dout.i, max_read_len) ;
 173                 }
 174         while (max_read_len > 0) ;
 175
 176 } /* interleave_int */
 177
 178
 179 static void
 180 interleave_double (STATE * state)
 181 {       int max_read_len, read_len ;
 182         int ch, k ;
 183
 184         do
 185         {       max_read_len = 0 ;
 186
 187                 for (ch = 0 ; ch < state->channels ; ch ++)
 188                 {       read_len = sf_read_double (state->infile [ch], state->din.d, BUFFER_LEN) ;
 189                         if (read_len < BUFFER_LEN)
 190                                 memset (state->din.d + read_len, 0, sizeof (state->din.d [0]) * (BUFFER_LEN - read_len)) ;
 191
 192                         for (k = 0 ; k < read_len ; k++)
 193                                 state->dout.d [k * state->channels + ch] = state->din.d [k] ;
 194
 195                         max_read_len = MAX (max_read_len, read_len) ;
 196                         } ;
 197
 198                 sf_writef_double (state->outfile, state->dout.d, max_read_len) ;
 199                 }
 200         while (max_read_len > 0) ;
 201
 202 } /* interleave_double */