1
/* $Id: mix.c 3664 2011-07-19 03:42:28Z nanang $ */
3
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
4
* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
6
* This program is free software; you can redistribute it and/or modify
7
* it under the terms of the GNU General Public License as published by
8
* the Free Software Foundation; either version 2 of the License, or
9
* (at your option) any later version.
11
* This program is distributed in the hope that it will be useful,
12
* but WITHOUT ANY WARRANTY; without even the implied warranty of
13
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14
* GNU General Public License for more details.
16
* You should have received a copy of the GNU General Public License
17
* along with this program; if not, write to the Free Software
18
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22
* \page page_pjmedia_samples_mix_c Samples: Mixing WAV files
24
* This file is pjsip-apps/src/samples/mix.c
26
* \includelineno mix.c
30
#include <pjlib-util.h>
33
#define THIS_FILE "mix.c"
35
static const char *desc =
39
" Mix input WAV files and save it to output WAV. Input WAV can have\n"
40
" different clock rate.\n"
44
" mix [options] output.wav input1.wav [input2.wav] ...\n"
47
" output.wav Set the output WAV filename.\n"
48
" input1.wav Set the input WAV filename.\n"
49
" input2.wav Set the input WAV filename.\n"
52
" -c N Set clock rate to N Hz (default 16000)\n"
53
" -f Force write (overwrite output without warning\n"
67
static int err_ret(const char *title, pj_status_t status)
69
char errmsg[PJ_ERR_MSG_SIZE];
70
pj_strerror(status, errmsg, sizeof(errmsg));
71
PJ_LOG(3,(THIS_FILE, "%s error: %s", title, errmsg));
75
static void usage(void)
80
int main(int argc, char *argv[])
84
pjmedia_endpt *med_ept;
85
unsigned clock_rate = 16000;
87
const char *out_fname;
90
struct wav_input wav_input[MAX_WAV];
91
pj_size_t longest = 0, processed;
92
unsigned i, input_cnt = 0;
95
#define CHECK(op) do { \
97
if (status != PJ_SUCCESS) \
98
return err_ret(#op, status); \
102
/* Parse arguments */
103
while ((c=pj_getopt(argc, argv, "c:f")) != -1) {
106
clock_rate = atoi(pj_optarg);
107
if (clock_rate < 1000) {
108
puts("Error: invalid clock rate");
119
/* Get output WAV name */
120
if (pj_optind == argc) {
121
puts("Error: no WAV output is specified");
126
out_fname = argv[pj_optind++];
127
if (force==0 && pj_file_exists(out_fname)) {
130
printf("File %s exists, overwrite? [Y/N] ", out_fname);
132
if (fgets(in, sizeof(in), stdin) == NULL)
134
if (pj_tolower(in[0]) != 'y')
138
/* Scan input file names */
139
for (input_cnt=0 ; pj_optind<argc && input_cnt<MAX_WAV;
140
++pj_optind, ++input_cnt)
142
if (!pj_file_exists(argv[pj_optind])) {
143
printf("Error: input file %s doesn't exist\n",
147
wav_input[input_cnt].fname = argv[pj_optind];
148
wav_input[input_cnt].port = NULL;
149
wav_input[input_cnt].slot = 0;
152
if (input_cnt == 0) {
153
puts("Error: no input WAV is specified");
159
CHECK( pjlib_util_init() );
160
pj_caching_pool_init(&cp, NULL, 0);
161
CHECK( pjmedia_endpt_create(&cp.factory, NULL, 1, &med_ept) );
163
pool = pj_pool_create(&cp.factory, "mix", 1000, 1000, NULL);
165
/* Create the bridge */
166
CHECK( pjmedia_conf_create(pool, MAX_WAV+4, clock_rate, 1,
167
clock_rate * PTIME / 1000, 16,
168
PJMEDIA_CONF_NO_DEVICE, &conf) );
170
/* Create the WAV output */
171
CHECK( pjmedia_wav_writer_port_create(pool, out_fname, clock_rate, 1,
172
clock_rate * PTIME / 1000,
173
16, 0, 0, &wavout) );
175
/* Create and register each WAV input to the bridge */
176
for (i=0; i<input_cnt; ++i) {
179
CHECK( pjmedia_wav_player_port_create(pool, wav_input[i].fname, 20,
180
PJMEDIA_FILE_NO_LOOP, 0,
181
&wav_input[i].port) );
182
len = pjmedia_wav_player_get_len(wav_input[i].port);
183
len = (pj_ssize_t)(len * 1.0 * clock_rate /
184
PJMEDIA_PIA_SRATE(&wav_input[i].port->info));
185
if (len > (pj_ssize_t)longest)
188
CHECK( pjmedia_conf_add_port(conf, pool, wav_input[i].port,
189
NULL, &wav_input[i].slot));
191
CHECK( pjmedia_conf_connect_port(conf, wav_input[i].slot, 0, 0) );
194
/* Loop reading frame from the bridge and write it to WAV */
196
while (processed < longest + clock_rate * APPEND * 2 / 1000) {
197
pj_int16_t framebuf[PTIME * 48000 / 1000];
198
pjmedia_port *cp = pjmedia_conf_get_master_port(conf);
201
frame.buf = framebuf;
202
frame.size = PJMEDIA_PIA_SPF(&cp->info) * 2;
203
pj_assert(frame.size <= sizeof(framebuf));
205
CHECK( pjmedia_port_get_frame(cp, &frame) );
207
if (frame.type != PJMEDIA_FRAME_TYPE_AUDIO) {
208
pj_bzero(frame.buf, frame.size);
209
frame.type = PJMEDIA_FRAME_TYPE_AUDIO;
212
CHECK( pjmedia_port_put_frame(wavout, &frame));
214
processed += frame.size;
217
PJ_LOG(3,(THIS_FILE, "Done. Output duration: %d.%03d",
218
(processed >> 2)/clock_rate,
219
((processed >> 2)*1000/clock_rate) % 1000));
221
/* Shutdown everything */
222
CHECK( pjmedia_port_destroy(wavout) );
223
for (i=0; i<input_cnt; ++i) {
224
CHECK( pjmedia_conf_remove_port(conf, wav_input[i].slot) );
225
CHECK( pjmedia_port_destroy(wav_input[i].port) );
228
CHECK(pjmedia_conf_destroy(conf));
229
CHECK(pjmedia_endpt_destroy(med_ept));
231
pj_pool_release(pool);
232
pj_caching_pool_destroy(&cp);