struct sound_params *sg_create_sound_params(int type, void *params)
{
if( !sound_params_mem )
sound_params_mem = mp_create(sizeof(struct sound_params), 2);
struct sound_params * sc = mp_alloc(sound_params_mem);
sg_set_params(sc, type, params);
return sc;
}
struct sine_parameters *sg_create_sine_parameters(float frequency,
float sample_rate)
{
if( !sine_parameter_mp )
sine_parameter_mp = mp_create(sizeof(struct sine_parameters), 16);
struct sine_parameters *p = mp_alloc(sine_parameter_mp);
p->frequency = frequency;
p->ticks_per_rev = sample_rate/frequency;
p->rev = (sample_rate/frequency) / (2*PI);
p->counter = 0;
p->sample_rate = sample_rate;
p->current_value = 0;
return p;
}
struct triangle_parameters *sg_create_triangle_parameters(float frequency,
float sample_rate)
{
if( !triangle_parameter_mp )
triangle_parameter_mp = mp_create(sizeof(struct triangle_parameters), 16);
struct triangle_parameters *p = mp_alloc(triangle_parameter_mp);
p->frequency = frequency;
p->ticks_per_rev = sample_rate/frequency;
p->counter = 0;
p->sample_rate = sample_rate;
p->current_value = 0;
p->slope = 1 / (p->ticks_per_rev/4.0);
return p;
}
struct sawtooth_parameters *sg_create_sawtooth_parameters(float frequency,
float sample_rate)
{
if( !sawtooth_parameter_mp )
sawtooth_parameter_mp = mp_create(sizeof(struct sawtooth_parameters), 16);
struct sawtooth_parameters *p = mp_alloc(sawtooth_parameter_mp);
p->frequency = frequency;
p->ticks_per_rev = sample_rate/frequency;
p->counter = 0;
p->sample_rate = sample_rate;
p->current_value = -1;
p->slope = 2.0 / p->ticks_per_rev;
return p;
}
struct square_wave_parameters *sg_create_square_wave_parameters(float frequency,
float duty_cycle,
float sample_rate)
{
if( !square_wave_parameter_mem )
square_wave_parameter_mem = mp_create(sizeof(struct square_wave_parameters), 16);
struct square_wave_parameters *p = mp_alloc(square_wave_parameter_mem);
p->frequency = frequency;
p->ticks_per_rev = sample_rate/frequency;
p->counter = 0;
p->sample_rate = sample_rate;
p->current_value = 0;
p->duty_cycle = duty_cycle;
return p;
}
static void
enable_test_thread(int on)
{
if(!generator_tid == !on)
return;
if(on) {
assert(gen_mp == NULL);
gen_mp = mp_create("testsignal", MP_PRIMABLE);
hts_thread_create_joinable("audiotest", &generator_tid,
test_generator_thread, gen_mp,
THREAD_PRIO_DEMUXER);
} else {
event_t *e = event_create_type(EVENT_EXIT);
mp_enqueue_event(gen_mp, e);
event_release(e);
hts_thread_join(&generator_tid);
mp_shutdown(gen_mp);
mp_ref_dec(gen_mp);
gen_mp = NULL;
generator_tid = 0;
}
}
