sndfile-deinterleave.c
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上传日期:2022-01-05
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文件大小:5k
- /*
- ** Copyright (C) 2009 Erik de Castro Lopo <erikd@mega-nerd.com>
- **
- ** All rights reserved.
- **
- ** Redistribution and use in source and binary forms, with or without
- ** modification, are permitted provided that the following conditions are
- ** met:
- **
- ** * Redistributions of source code must retain the above copyright
- ** notice, this list of conditions and the following disclaimer.
- ** * Redistributions in binary form must reproduce the above copyright
- ** notice, this list of conditions and the following disclaimer in
- ** the documentation and/or other materials provided with the
- ** distribution.
- ** * Neither the author nor the names of any contributors may be used
- ** to endorse or promote products derived from this software without
- ** specific prior written permission.
- **
- ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- ** TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- ** PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- ** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- ** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- ** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- ** OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- ** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- ** OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- ** ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <sndfile.h>
- #include "common.h"
- #define BUFFER_LEN 4096
- #define MAX_CHANNELS 16
- typedef struct
- { SNDFILE * infile ;
- SNDFILE * outfile [MAX_CHANNELS] ;
- union
- { double d [MAX_CHANNELS * BUFFER_LEN] ;
- int i [MAX_CHANNELS * BUFFER_LEN] ;
- } din ;
- union
- { double d [BUFFER_LEN] ;
- int i [BUFFER_LEN] ;
- } dout ;
- int channels ;
- } STATE ;
- static void usage_exit (void) ;
- static void deinterleave_int (STATE * state) ;
- static void deinterleave_double (STATE * state) ;
- int
- main (int argc, char **argv)
- { STATE state ;
- SF_INFO sfinfo ;
- char pathname [512], ext [32], *cptr ;
- int ch, double_split ;
- if (argc != 2)
- { puts ("nError : need a single input file.n") ;
- usage_exit () ;
- } ;
- memset (&state, 0, sizeof (state)) ;
- memset (&sfinfo, 0, sizeof (sfinfo)) ;
- if ((state.infile = sf_open (argv [1], SFM_READ, &sfinfo)) == NULL)
- { printf ("nError : Not able to open input file '%s'n%sn", argv [1], sf_strerror (NULL)) ;
- exit (1) ;
- } ;
- if (sfinfo.channels < 2)
- { printf ("nError : Input file '%s' only has one channel.n", argv [1]) ;
- exit (1) ;
- } ;
- state.channels = sfinfo.channels ;
- sfinfo.channels = 1 ;
- snprintf (pathname, sizeof (pathname), "%s", argv [1]) ;
- if ((cptr = strrchr (pathname, '.')) == NULL)
- ext [0] = 0 ;
- else
- { snprintf (ext, sizeof (ext), "%s", cptr) ;
- cptr [0] = 0 ;
- } ;
- printf ("Input file : %sn", pathname) ;
- puts ("Output files :") ;
- for (ch = 0 ; ch < state.channels ; ch++)
- { char filename [520] ;
- snprintf (filename, sizeof (filename), "%s_%02d%s", pathname, ch, ext) ;
- if ((state.outfile [ch] = sf_open (filename, SFM_WRITE, &sfinfo)) == NULL)
- { printf ("Not able to open output file '%s'n%sn", filename, sf_strerror (NULL)) ;
- exit (1) ;
- } ;
- printf (" %sn", filename) ;
- } ;
- switch (sfinfo.format & SF_FORMAT_SUBMASK)
- { case SF_FORMAT_FLOAT :
- case SF_FORMAT_DOUBLE :
- case SF_FORMAT_VORBIS :
- double_split = 1 ;
- break ;
- default :
- double_split = 0 ;
- break ;
- } ;
- if (double_split)
- deinterleave_double (&state) ;
- else
- deinterleave_int (&state) ;
- sf_close (state.infile) ;
- for (ch = 0 ; ch < MAX_CHANNELS ; ch++)
- if (state.outfile [ch] != NULL)
- sf_close (state.outfile [ch]) ;
- return 0 ;
- } /* main */
- /*------------------------------------------------------------------------------
- */
- static void
- usage_exit (void)
- { puts ("nUsage : sndfile-deinterleave <filename>n") ;
- puts ("Split a mutli channel file into a set of mon files.n") ;
- exit (0) ;
- } /* usage_exit */
- static void
- deinterleave_int (STATE * state)
- { int read_len ;
- int ch, k ;
- do
- { read_len = sf_readf_int (state->infile, state->din.i, BUFFER_LEN) ;
- for (ch = 0 ; ch < state->channels ; ch ++)
- { for (k = 0 ; k < read_len ; k++)
- state->dout.i [k] = state->din.i [k * state->channels + ch] ;
- sf_write_int (state->outfile [ch], state->dout.i, read_len) ;
- } ;
- }
- while (read_len > 0) ;
- } /* deinterleave_int */
- static void
- deinterleave_double (STATE * state)
- { int read_len ;
- int ch, k ;
- do
- { read_len = sf_readf_double (state->infile, state->din.d, BUFFER_LEN) ;
- for (ch = 0 ; ch < state->channels ; ch ++)
- { for (k = 0 ; k < read_len ; k++)
- state->dout.d [k] = state->din.d [k * state->channels + ch] ;
- sf_write_double (state->outfile [ch], state->dout.d, read_len) ;
- } ;
- }
- while (read_len > 0) ;
- } /* deinterleave_double */