comparison src/libsndfile-1.0.25/programs/sndfile-deinterleave.c @ 0:c7265573341e

Import initial set of sources

+/*
+** Copyright (C) 2009-2011 Erik de Castro Lopo <[e-mail]>
+**
+** 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)
+	{	if (argc != 1)
+			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%s\n", 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 : %s\n", 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%s\n", filename, sf_strerror (NULL)) ;
+			exit (1) ;
+			} ;
+
+		printf ("    %s\n", 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 mono files.\n"
+		"\n"
+		"If the input file is named 'a.wav', the output files will be named\n"
+		"a_00.wav, a_01.wav and so on.\n"
+		) ;
+	printf ("Using %s.\n\n", sf_version_string ()) ;
+	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 */