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/*
Copyright (C) 2005-2009 Michel de Boer <michel@twinklephone.com>
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, see <https://www.gnu.org/licenses/>.
*/
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <cstdlib>
#include <cstdio>
#include <cstring>
#include <sys/soundcard.h>
#include <iostream>
#include "tone_gen.h"
#include "log.h"
#include "sys_settings.h"
#include "user.h"
#include "userintf.h"
#include "util.h"
#include "audits/memman.h"
#include "audio_device.h"
// Number of samples read at once from the wav file
#define NUM_SAMPLES_PER_TURN 1024
// Duration of one turn in ms
#define DURATION_TURN (NUM_SAMPLES_PER_TURN * 1000 / wav_info.samplerate)
// Main function for play thread
void *tone_gen_play(void *arg) {
ui->add_prohibited_thread();
t_tone_gen *tg = (t_tone_gen *)arg;
tg->play();
ui->remove_prohibited_thread();
return NULL;
}
t_tone_gen::t_tone_gen(const string &filename, const t_audio_device &_dev_tone) :
dev_tone(_dev_tone),
sema_finished(0)
{
string f;
wav_file = NULL;
aio = 0;
valid = false;
data_buf = NULL;
thr_play = NULL;
loop = false;
pause = 0;
if (filename.size() == 0) return;
// Add share directory to filename
if (filename[0] != '/') {
f = sys_config->get_dir_share();
f += "/";
f += filename;
} else {
f = filename;
}
wav_filename = f;
memset(&wav_info, 0, sizeof(SF_INFO));
wav_file = sf_open(f.c_str(), SFM_READ, &wav_info);
if (!wav_file) {
string msg("Cannot open ");
msg += f;
log_file->write_report(msg, "t_tone_gen::t_tone_gen",
LOG_NORMAL, LOG_WARNING);
ui->cb_display_msg(msg, MSG_WARNING);
return;
}
log_file->write_header("t_tone_gen::t_tone_gen");
log_file->write_raw("Opened ");
log_file->write_raw(f);
log_file->write_endl();
log_file->write_footer();
valid = true;
stop_playing = false;
}
t_tone_gen::~t_tone_gen() {
if (wav_file) {
sf_close(wav_file);
}
if (aio) {
MEMMAN_DELETE(aio);
delete aio;
}
aio = 0;
if (data_buf) {
MEMMAN_DELETE_ARRAY(data_buf);
delete [] data_buf;
}
if (thr_play) {
MEMMAN_DELETE(thr_play);
delete thr_play;
}
log_file->write_report("Deleted tone generator.",
"t_tone_gen::~t_tone_gen");
}
bool t_tone_gen::is_valid(void) const {
return valid;
}
void t_tone_gen::play(void) {
if (!valid) {
log_file->write_report(
"Tone generator is invalid. Cannot play tone",
"t_tone_gen::play", LOG_NORMAL, LOG_WARNING);
sema_finished.up();
return;
}
aio = t_audio_io::open(dev_tone, true, false, true, wav_info.channels,
SAMPLEFORMAT_S16, wav_info.samplerate, false);
if (!aio) {
string msg("Failed to open sound card: ");
msg += get_error_str(errno);
log_file->write_report(msg, "t_tone_gen::play",
LOG_NORMAL, LOG_WARNING);
ui->cb_display_msg(msg, MSG_WARNING);
sema_finished.up();
return;
}
log_file->write_report("Start playing tone.",
"t_tone_gen::play");
do {
// Each samples consists of #channels shorts
data_buf = new short[NUM_SAMPLES_PER_TURN * wav_info.channels];
MEMMAN_NEW_ARRAY(data_buf);
sf_count_t frames_read = NUM_SAMPLES_PER_TURN;
while (frames_read == NUM_SAMPLES_PER_TURN) {
if (stop_playing) break;
// Play sample
frames_read = sf_readf_short(wav_file, data_buf, NUM_SAMPLES_PER_TURN);
if (frames_read > 0) {
aio->write((unsigned char*)data_buf,
frames_read * wav_info.channels * 2);
}
}
MEMMAN_DELETE_ARRAY(data_buf);
delete [] data_buf;
data_buf = NULL;
if (stop_playing) break;
// Pause between repetitions
if (loop) {
// Play silence
if (pause > 0) {
data_buf = new short[NUM_SAMPLES_PER_TURN * wav_info.channels];
MEMMAN_NEW_ARRAY(data_buf);
memset(data_buf, 0, NUM_SAMPLES_PER_TURN * wav_info.channels * 2);
for (int i = 0; i < pause; i += DURATION_TURN) {
aio->write((unsigned char*)data_buf,
NUM_SAMPLES_PER_TURN * wav_info.channels * 2);
if (stop_playing) break;
}
MEMMAN_DELETE_ARRAY(data_buf);
delete [] data_buf;
data_buf = NULL;
}
if (stop_playing) break;
// Set file pointer back to start of data
sf_seek(wav_file, 0, SEEK_SET);
}
} while (loop);
log_file->write_report("Tone ended.",
"t_tone_gen::play_tone");
sema_finished.up();
}
void t_tone_gen::start_play_thread(bool _loop, int _pause) {
loop = _loop;
pause = _pause;
thr_play = new t_thread(tone_gen_play, this);
MEMMAN_NEW(thr_play);
thr_play->detach();
}
void t_tone_gen::stop(void) {
log_file->write_report("Stopping tone.",
"t_tone_gen::stop");
if (stop_playing) {
log_file->write_report("Tone has stopped already.",
"t_tone_gen::stop");
return;
}
// This will stop the playing thread.
stop_playing = true;
// The semaphore will be upped by the playing thread as soon
// as playing finishes.
sema_finished.down();
log_file->write_report("Tone stopped.",
"t_tone_gen::stop");
if (aio) {
MEMMAN_DELETE(aio);
delete aio;
aio = 0;
}
}
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