| /* $Id$ */ |
| /* |
| * 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; |
| } |
| |