PRIVATE int init_instance(Generator *g) {
Data *data;
instance_count++;
if (instance_count > 1)
/* Not allowed more than one of these things. */
return 0;
data = safe_malloc(sizeof(Data));
data->audiofd = open_audiofd();
if (data->audiofd < 0) {
free(data);
popup_msgbox("Error", MSGBOX_OK, 120000, MSGBOX_OK, "Could not open ESound audio subsystem.");
return 0;
}
data->input_tag = -1;
data->clock = gen_register_clock(g, "ESD Output Clock", clock_handler);
g->data = data;
gen_register_realtime_fn(g, realtime_handler);
gen_select_clock(data->clock); /* a not unreasonable assumption? */
return 1;
}
PRIVATE void clock_handler(AClock *clock, AClockReason reason) {
Data *data = clock->gen->data;
switch (reason) {
case CLOCK_DISABLE:
if (data->open) {
gtk_idle_remove(data->idle_tag);
close_audiofd(data->hwo);
data->open = FALSE;
}
break;
case CLOCK_ENABLE:
if (!data->open) {
data->open = open_audiofd(&data->hwo);
if (data->open)
data->idle_tag = gtk_idle_add(idle_handler, NULL);
}
break;
default:
g_message("Unreachable code reached (win_output)... reason = %d", reason);
break;
}
}
int main (int argc, char *argv[]) {
char jack_name[64] = "alsa_out";
char alsa_device[64] = "hw:0";
char server_name[64] = "default";
extern char *optarg;
extern int optind, optopt;
int errflg=0;
int c;
while ((c = getopt(argc, argv, "ivj:r:c:p:n:d:q:m:t:f:F:C:Q:s:S:")) != -1) {
switch(c) {
case 'j':
strncpy(jack_name,optarg, sizeof(jack_name));
break;
case 'r':
sample_rate = atoi(optarg);
break;
case 'c':
num_channels = atoi(optarg);
break;
case 'p':
period_size = atoi(optarg);
break;
case 'n':
num_periods = atoi(optarg);
break;
case 'd':
strncpy(alsa_device,optarg,sizeof(alsa_device));
break;
case 't':
target_delay = atoi(optarg);
break;
case 'q':
samplerate_quality = atoi(optarg);
break;
case 'm':
max_diff = atoi(optarg);
break;
case 'f':
catch_factor = atoi(optarg);
break;
case 'F':
catch_factor2 = atoi(optarg);
break;
case 'C':
pclamp = (double) atoi(optarg);
break;
case 'Q':
controlquant = (double) atoi(optarg);
break;
case 'v':
verbose = 1;
break;
case 'i':
instrument = 1;
break;
case 's':
smooth_size = atoi(optarg);
break;
case 'S':
strncpy(server_name,optarg,sizeof(server_name));
break;
case ':':
fprintf(stderr,
"Option -%c requires an operand\n", optopt);
errflg++;
break;
case '?':
fprintf(stderr,
"Unrecognized option: -%c\n", optopt);
errflg++;
}
}
if (errflg) {
printUsage();
exit(2);
}
if( (samplerate_quality < 0) || (samplerate_quality > 4) ) {
fprintf (stderr, "invalid samplerate quality\n");
return 1;
}
if ((client = jack_client_open (jack_name, JackServerName, NULL, server_name)) == 0) {
fprintf (stderr, "jack server not running?\n");
return 1;
}
/* tell the JACK server to call `process()' whenever
there is work to be done.
*/
jack_set_process_callback (client, process, 0);
/* tell the JACK server to call `jack_shutdown()' if
it ever shuts down, either entirely, or if it
just decides to stop calling us.
*/
jack_on_shutdown (client, jack_shutdown, 0);
if (jack_set_latency_callback)
jack_set_latency_callback (client, latency_cb, 0);
// get jack sample_rate
jack_sample_rate = jack_get_sample_rate( client );
if( !sample_rate )
sample_rate = jack_sample_rate;
static_resample_factor = (double) sample_rate / (double) jack_sample_rate;
resample_lower_limit = static_resample_factor * 0.25;
resample_upper_limit = static_resample_factor * 4.0;
resample_mean = static_resample_factor;
offset_array = malloc( sizeof(double) * smooth_size );
if( offset_array == NULL ) {
fprintf( stderr, "no memory for offset_array !!!\n" );
exit(20);
}
window_array = malloc( sizeof(double) * smooth_size );
if( window_array == NULL ) {
fprintf( stderr, "no memory for window_array !!!\n" );
exit(20);
}
int i;
for( i=0; i<smooth_size; i++ ) {
offset_array[i] = 0.0;
window_array[i] = hann( (double) i / ((double) smooth_size - 1.0) );
}
jack_buffer_size = jack_get_buffer_size( client );
// Setup target delay and max_diff for the normal user, who does not play with them...
if( !target_delay )
target_delay = (num_periods*period_size / 2) - jack_buffer_size/2;
if( !max_diff )
max_diff = target_delay;
if( max_diff > target_delay ) {
fprintf( stderr, "target_delay (%d) cant be smaller than max_diff(%d)\n", target_delay, max_diff );
exit(20);
}
if( (target_delay+max_diff) > (num_periods*period_size) ) {
fprintf( stderr, "target_delay+max_diff (%d) cant be bigger than buffersize(%d)\n", target_delay+max_diff, num_periods*period_size );
exit(20);
}
// now open the alsa fd...
alsa_handle = open_audiofd( alsa_device, 0, sample_rate, num_channels, period_size, num_periods);
if( alsa_handle == 0 )
exit(20);
printf( "selected sample format: %s\n", formats[format].name );
// alloc input ports, which are blasted out to alsa...
alloc_ports( 0, num_channels );
outbuf = malloc( num_periods * period_size * formats[format].sample_size * num_channels );
resampbuf = malloc( num_periods * period_size * sizeof( float ) );
tmpbuf = malloc( 512 * formats[format].sample_size * num_channels );
if ((outbuf == NULL) || (resampbuf == NULL) || (tmpbuf == NULL))
{
fprintf( stderr, "no memory for buffers.\n" );
exit(20);
}
/* tell the JACK server that we are ready to roll */
if (jack_activate (client)) {
fprintf (stderr, "cannot activate client");
return 1;
}
signal( SIGTERM, sigterm_handler );
signal( SIGINT, sigterm_handler );
if( verbose ) {
while(!quit) {
usleep(500000);
if( output_new_delay ) {
printf( "delay = %d\n", output_new_delay );
output_new_delay = 0;
}
printf( "res: %f, \tdiff = %f, \toffset = %f \n", output_resampling_factor, output_diff, output_offset );
}
} else if( instrument ) {
printf( "# n\tresamp\tdiff\toffseti\tintegral\n");
int n=0;
while(!quit) {
usleep(1000);
printf( "%d\t%f\t%f\t%f\t%f\n", n++, output_resampling_factor, output_diff, output_offset, output_integral );
}
} else {
while(!quit)
{
usleep(500000);
if( output_new_delay ) {
printf( "delay = %d\n", output_new_delay );
output_new_delay = 0;
}
}
}
jack_deactivate( client );
jack_client_close (client);
exit (0);
}