echo.c

/*
 * Copyright (c) 2010-2022 Belledonne Communications SARL.
 *
 * This file is part of mediastreamer2
 * (see https://gitlab.linphone.org/BC/public/mediastreamer2).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include <bctoolbox/defs.h>

#ifdef HAVE_CONFIG_H
#include "mediastreamer-config.h"
#endif

#include "mediastreamer2/msfilter.h"
#include "mediastreamer2/mssndcard.h"
#include "mediastreamer2/msticker.h"
#include <ortp/ortp.h>

#ifndef _WIN32_WCE
#include <signal.h>
#elif defined(_MSC_VER)
#define main _tmain
#endif

static int run = 1;

static void stop(BCTBX_UNUSED(int signum)) {
	run = 0;
}

static void print_usage(void) {
	printf("echo\t\t[--card <sound card name>]\n"
	       "\t\t[--capt-card <sound card name>]\n"
	       "\t\t[--play-card <sound card name>]\n");
	exit(-1);
}

int main(int argc, char *argv[]) {
	MSFilter *f1, *f2;
	MSSndCard *card_capture;
	MSSndCard *card_playback;
	MSTicker *ticker;
	MSFactory *factory;

	char *capt_card = NULL, *play_card = NULL;
	int rate = 8000;
	int i;
#ifdef __linux__
	const char *alsadev = NULL;
#endif

	ortp_init();
	ortp_set_log_level_mask(ORTP_LOG_DOMAIN, ORTP_MESSAGE | ORTP_WARNING | ORTP_ERROR | ORTP_FATAL);

	factory = ms_factory_new_with_voip();

#ifndef _WIN32_WCE
	signal(SIGINT, stop);
#endif

#ifdef __linux__
	alsadev = getenv("MS2_ALSADEV");
	if (alsadev != NULL) {
		ms_snd_card_manager_add_card(ms_factory_get_snd_card_manager(factory),
		                             ms_alsa_card_new_custom(alsadev, alsadev));
	}
#endif

	for (i = 1; i < argc; ++i) {
		if (strcmp(argv[i], "--help") == 0) {
			print_usage();
		} else if (strcmp(argv[i], "--card") == 0) {
			i++;
			capt_card = play_card = argv[i];
		} else if (strcmp(argv[i], "--capt-card") == 0) {
			i++;
			capt_card = argv[i];
		} else if (strcmp(argv[i], "--play-card") == 0) {
			i++;
			play_card = argv[i];
		}
	}

	if (capt_card) card_capture = ms_snd_card_manager_get_card(ms_factory_get_snd_card_manager(factory), capt_card);
	else card_capture = ms_snd_card_manager_get_default_capture_card(ms_factory_get_snd_card_manager(factory));
	if (play_card) card_playback = ms_snd_card_manager_get_card(ms_factory_get_snd_card_manager(factory), play_card);
	else card_playback = ms_snd_card_manager_get_default_playback_card(ms_factory_get_snd_card_manager(factory));

	if (card_playback == NULL || card_capture == NULL) {
		ms_error("No card.");
		return -1;
	}
	f1 = ms_snd_card_create_reader(card_capture);
	f2 = ms_snd_card_create_writer(card_playback);

	ms_filter_call_method(f1, MS_FILTER_SET_SAMPLE_RATE, &rate);
	ms_filter_call_method(f2, MS_FILTER_SET_SAMPLE_RATE, &rate);

	ticker = ms_ticker_new();
	ms_filter_link(f1, 0, f2, 0);
	ms_ticker_attach(ticker, f1);
#ifndef _WIN32_WCE
	while (run)
		ms_sleep(1);
#else
	ms_sleep(5);
#endif
	ms_ticker_detach(ticker, f1);
	ms_ticker_destroy(ticker);
	ms_filter_unlink(f1, 0, f2, 0);
	ms_filter_destroy(f1);
	ms_filter_destroy(f2);

	ms_factory_destroy(factory);
	return 0;
}