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/* $Id: mix.c 3664 2011-07-19 03:42:28Z nanang $ */
/*
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
* \page page_pjmedia_samples_mix_c Samples: Mixing WAV files
*
* This file is pjsip-apps/src/samples/mix.c
*
* \includelineno mix.c
*/
#include <pjlib.h>
#include <pjlib-util.h>
#include <pjmedia.h>
#define THIS_FILE "mix.c"
static const char *desc =
" mix\n"
"\n"
" PURPOSE:\n"
" Mix input WAV files and save it to output WAV. Input WAV can have\n"
" different clock rate.\n"
"\n"
"\n"
" USAGE:\n"
" mix [options] output.wav input1.wav [input2.wav] ...\n"
"\n"
" arguments:\n"
" output.wav Set the output WAV filename.\n"
" input1.wav Set the input WAV filename.\n"
" input2.wav Set the input WAV filename.\n"
"\n"
" options:\n"
" -c N Set clock rate to N Hz (default 16000)\n"
" -f Force write (overwrite output without warning\n"
;
#define MAX_WAV 16
#define PTIME 20
#define APPEND 1000
struct wav_input
{
const char *fname;
pjmedia_port *port;
unsigned slot;
};
static int err_ret(const char *title, pj_status_t status)
{
char errmsg[PJ_ERR_MSG_SIZE];
pj_strerror(status, errmsg, sizeof(errmsg));
PJ_LOG(3,(THIS_FILE, "%s error: %s", title, errmsg));
return 1;
}
static void usage(void)
{
puts(desc);
}
int main(int argc, char *argv[])
{
pj_caching_pool cp;
pj_pool_t *pool;
pjmedia_endpt *med_ept;
unsigned clock_rate = 16000;
int c, force=0;
const char *out_fname;
pjmedia_conf *conf;
pjmedia_port *wavout;
struct wav_input wav_input[MAX_WAV];
pj_size_t longest = 0, processed;
unsigned i, input_cnt = 0;
pj_status_t status;
#define CHECK(op) do { \
status = op; \
if (status != PJ_SUCCESS) \
return err_ret(#op, status); \
} while (0)
/* Parse arguments */
while ((c=pj_getopt(argc, argv, "c:f")) != -1) {
switch (c) {
case 'c':
clock_rate = atoi(pj_optarg);
if (clock_rate < 1000) {
puts("Error: invalid clock rate");
usage();
return -1;
}
break;
case 'f':
force = 1;
break;
}
}
/* Get output WAV name */
if (pj_optind == argc) {
puts("Error: no WAV output is specified");
usage();
return 1;
}
out_fname = argv[pj_optind++];
if (force==0 && pj_file_exists(out_fname)) {
char in[8];
printf("File %s exists, overwrite? [Y/N] ", out_fname);
fflush(stdout);
if (fgets(in, sizeof(in), stdin) == NULL)
return 1;
if (pj_tolower(in[0]) != 'y')
return 1;
}
/* Scan input file names */
for (input_cnt=0 ; pj_optind<argc && input_cnt<MAX_WAV;
++pj_optind, ++input_cnt)
{
if (!pj_file_exists(argv[pj_optind])) {
printf("Error: input file %s doesn't exist\n",
argv[pj_optind]);
return 1;
}
wav_input[input_cnt].fname = argv[pj_optind];
wav_input[input_cnt].port = NULL;
wav_input[input_cnt].slot = 0;
}
if (input_cnt == 0) {
puts("Error: no input WAV is specified");
return 0;
}
/* Initialialize */
CHECK( pj_init() );
CHECK( pjlib_util_init() );
pj_caching_pool_init(&cp, NULL, 0);
CHECK( pjmedia_endpt_create(&cp.factory, NULL, 1, &med_ept) );
pool = pj_pool_create(&cp.factory, "mix", 1000, 1000, NULL);
/* Create the bridge */
CHECK( pjmedia_conf_create(pool, MAX_WAV+4, clock_rate, 1,
clock_rate * PTIME / 1000, 16,
PJMEDIA_CONF_NO_DEVICE, &conf) );
/* Create the WAV output */
CHECK( pjmedia_wav_writer_port_create(pool, out_fname, clock_rate, 1,
clock_rate * PTIME / 1000,
16, 0, 0, &wavout) );
/* Create and register each WAV input to the bridge */
for (i=0; i<input_cnt; ++i) {
pj_ssize_t len;
CHECK( pjmedia_wav_player_port_create(pool, wav_input[i].fname, 20,
PJMEDIA_FILE_NO_LOOP, 0,
&wav_input[i].port) );
len = pjmedia_wav_player_get_len(wav_input[i].port);
len = (pj_ssize_t)(len * 1.0 * clock_rate /
PJMEDIA_PIA_SRATE(&wav_input[i].port->info));
if (len > (pj_ssize_t)longest)
longest = len;
CHECK( pjmedia_conf_add_port(conf, pool, wav_input[i].port,
NULL, &wav_input[i].slot));
CHECK( pjmedia_conf_connect_port(conf, wav_input[i].slot, 0, 0) );
}
/* Loop reading frame from the bridge and write it to WAV */
processed = 0;
while (processed < longest + clock_rate * APPEND * 2 / 1000) {
pj_int16_t framebuf[PTIME * 48000 / 1000];
pjmedia_port *cp = pjmedia_conf_get_master_port(conf);
pjmedia_frame frame;
frame.buf = framebuf;
frame.size = PJMEDIA_PIA_SPF(&cp->info) * 2;
pj_assert(frame.size <= sizeof(framebuf));
CHECK( pjmedia_port_get_frame(cp, &frame) );
if (frame.type != PJMEDIA_FRAME_TYPE_AUDIO) {
pj_bzero(frame.buf, frame.size);
frame.type = PJMEDIA_FRAME_TYPE_AUDIO;
}
CHECK( pjmedia_port_put_frame(wavout, &frame));
processed += frame.size;
}
PJ_LOG(3,(THIS_FILE, "Done. Output duration: %d.%03d",
(processed >> 2)/clock_rate,
((processed >> 2)*1000/clock_rate) % 1000));
/* Shutdown everything */
CHECK( pjmedia_port_destroy(wavout) );
for (i=0; i<input_cnt; ++i) {
CHECK( pjmedia_conf_remove_port(conf, wav_input[i].slot) );
CHECK( pjmedia_port_destroy(wav_input[i].port) );
}
CHECK(pjmedia_conf_destroy(conf));
CHECK(pjmedia_endpt_destroy(med_ept));
pj_pool_release(pool);
pj_caching_pool_destroy(&cp);
pj_shutdown();
return 0;
}
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