int ftape_set_nr_buffers(int cnt)
{
int delta = cnt - ft_nr_buffers;
TRACE_FUN(ft_t_flow);
if (delta > 0) {
while (delta--) {
if (add_one_buffer() < 0) {
TRACE_EXIT -ENOMEM;
}
}
} else if (delta < 0) {
while (delta++) {
del_one_buffer();
}
}
ftape_zap_read_buffers();
TRACE_EXIT 0;
}
/* Mix out function: it mix buffers providing from the player and/or send it to output bus (multitrak soundcards)
*/
int mix_out(float *in_buffer, int in_buf_size, int bus)
{
//printf("mix_out: recus %d samples pour bus %d\n", in_buf_size, bus);
/* variables internes */
float *out_buffer = NULL;
float tmp1, tmp2;
int i;
LP_global_audio_data audio_data;
/* Test de in_buffer */
if(in_buffer == NULL) {
fprintf(stderr, "mix_out: in_buffer is NULL\n");
return -1;
}
/* Buffer de bus */
switch (bus) {
case 1: out_buffer = audio_data.bus_buffer_1; break;
case 2: out_buffer = audio_data.bus_buffer_2; break;
case 3: out_buffer = audio_data.bus_buffer_3; break;
case 4: out_buffer = audio_data.bus_buffer_4; break;
default: fprintf(stderr, "mix_out: bus not aviable: %d\n", bus);
return -1; break;
}
/* Si out_bus est NULL on renvois */
if(out_buffer == NULL) {
fprintf(stderr, "mix_out: out_buffer is NULL\n");
return -1;
}
/* mixage */
for(i=0; i<in_buf_size; i++) {
tmp1 = out_buffer[i];
tmp2 = in_buffer[i];
out_buffer[i] = (tmp1) + (tmp2 / audio_data.nb_players);
}
/* Routing de sortie */
add_one_buffer(out_buffer, audio_data.mixed_buffer, in_buf_size, audio_data.nb_channel, audio_data.bus_out[bus]);
return 0;
}
