You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
128 lines
3.9 KiB
128 lines
3.9 KiB
/* Simple example of using SoX libraries
|
|
*
|
|
* Copyright (c) 2007-14 robs@users.sourceforge.net
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
|
|
* Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#ifdef NDEBUG /* N.B. assert used with active statements so enable always. */
|
|
#undef NDEBUG /* Must undef above assert.h or other that might include it. */
|
|
#endif
|
|
|
|
#include "sox.h"
|
|
#include "util.h"
|
|
#include <stdio.h>
|
|
#include <assert.h>
|
|
|
|
/*
|
|
* Shows how to explicitly specify output file signal and encoding attributes.
|
|
*
|
|
* The example converts a given input file of any type to mono mu-law at 8kHz
|
|
* sampling-rate (providing that this is supported by the given output file
|
|
* type).
|
|
*
|
|
* For example:
|
|
*
|
|
* sox -r 16k -n input.wav synth 8 sin 0:8k sin 8k:0 gain -1
|
|
* ./example6 input.wav output.wav
|
|
* soxi input.wav output.wav
|
|
*
|
|
* gives:
|
|
*
|
|
* Input File : 'input.wav'
|
|
* Channels : 2
|
|
* Sample Rate : 16000
|
|
* Precision : 32-bit
|
|
* Duration : 00:00:08.00 = 128000 samples ~ 600 CDDA sectors
|
|
* File Size : 1.02M
|
|
* Bit Rate : 1.02M
|
|
* Sample Encoding: 32-bit Signed Integer PCM
|
|
*
|
|
* Input File : 'output.wav'
|
|
* Channels : 1
|
|
* Sample Rate : 8000
|
|
* Precision : 14-bit
|
|
* Duration : 00:00:08.00 = 64000 samples ~ 600 CDDA sectors
|
|
* File Size : 64.1k
|
|
* Bit Rate : 64.1k
|
|
* Sample Encoding: 8-bit u-law
|
|
*/
|
|
|
|
int main(int argc, char * argv[])
|
|
{
|
|
static sox_format_t * in, * out; /* input and output files */
|
|
sox_effects_chain_t * chain;
|
|
sox_effect_t * e;
|
|
char * args[10];
|
|
sox_signalinfo_t interm_signal; /* @ intermediate points in the chain. */
|
|
sox_encodinginfo_t out_encoding = {
|
|
SOX_ENCODING_ULAW,
|
|
8,
|
|
0,
|
|
sox_option_default,
|
|
sox_option_default,
|
|
sox_option_default,
|
|
sox_false
|
|
};
|
|
sox_signalinfo_t out_signal = {
|
|
8000,
|
|
1,
|
|
0,
|
|
0,
|
|
NULL
|
|
};
|
|
|
|
assert(argc == 3);
|
|
assert(sox_init() == SOX_SUCCESS);
|
|
assert((in = sox_open_read(argv[1], NULL, NULL, NULL)));
|
|
assert((out = sox_open_write(argv[2], &out_signal, &out_encoding, NULL, NULL, NULL)));
|
|
|
|
chain = sox_create_effects_chain(&in->encoding, &out->encoding);
|
|
|
|
interm_signal = in->signal; /* NB: deep copy */
|
|
|
|
e = sox_create_effect(sox_find_effect("input"));
|
|
args[0] = (char *)in, assert(sox_effect_options(e, 1, args) == SOX_SUCCESS);
|
|
assert(sox_add_effect(chain, e, &interm_signal, &in->signal) == SOX_SUCCESS);
|
|
free(e);
|
|
|
|
if (in->signal.rate != out->signal.rate) {
|
|
e = sox_create_effect(sox_find_effect("rate"));
|
|
assert(sox_effect_options(e, 0, NULL) == SOX_SUCCESS);
|
|
assert(sox_add_effect(chain, e, &interm_signal, &out->signal) == SOX_SUCCESS);
|
|
free(e);
|
|
}
|
|
|
|
if (in->signal.channels != out->signal.channels) {
|
|
e = sox_create_effect(sox_find_effect("channels"));
|
|
assert(sox_effect_options(e, 0, NULL) == SOX_SUCCESS);
|
|
assert(sox_add_effect(chain, e, &interm_signal, &out->signal) == SOX_SUCCESS);
|
|
free(e);
|
|
}
|
|
|
|
e = sox_create_effect(sox_find_effect("output"));
|
|
args[0] = (char *)out, assert(sox_effect_options(e, 1, args) == SOX_SUCCESS);
|
|
assert(sox_add_effect(chain, e, &interm_signal, &out->signal) == SOX_SUCCESS);
|
|
free(e);
|
|
|
|
sox_flow_effects(chain, NULL, NULL);
|
|
|
|
sox_delete_effects_chain(chain);
|
|
sox_close(out);
|
|
sox_close(in);
|
|
sox_quit();
|
|
|
|
return 0;
|
|
}
|
|
|