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// Compile with:
// gcc -o ecore_audio_custom ecore_audio_custom.c `pkg-config --libs --cflags ecore ecore-audio`
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>
#include <Ecore.h>
#include <Ecore_Audio.h>
#include <math.h>
Eo *in = NULL;
Eo *out = NULL;
unsigned char volume = 255;
int read_cb(void *data EINA_UNUSED, Eo *eo_obj, void *buf, int len)
{
static long int phase1 = 0, phase2 = 0;
static int modulation = 0;
double volume;
float *val = buf;
int i;
ecore_audio_obj_volume_get(eo_obj, &volume);
for(i=0; i<len/4; i++, phase1++)
{
if (phase1 >= 44100/(440+modulation))
{
phase1 = 0;
modulation = sin(2 * M_PI * phase2 / 1000) * 100;
phase2++;
}
val[i] = sin(2 * M_PI * (440+modulation) * (phase1) / 44100.0) * volume;
}
return len;
}
Ecore_Audio_Vio vio = {
.read = read_cb,
};
int
main(int argc, const char *argv[])
{
Eina_Bool ret;
ecore_init();
ecore_audio_init();
ecore_app_args_set(argc, argv);
out = efl_add_ref(ECORE_AUDIO_OBJ_OUT_PULSE_CLASS, NULL);
in = efl_add_ref(ECORE_AUDIO_OBJ_IN_CLASS, NULL);
if (!in)
{
printf("error when creating ecore audio source.\n");
goto end;
}
efl_name_set(in, "wail");
ecore_audio_obj_in_samplerate_set(in, 44100);
ecore_audio_obj_in_channels_set(in, 1);
ecore_audio_obj_volume_set(in, 0.7);
ecore_audio_obj_vio_set(in, &vio, NULL, NULL);
ret = ecore_audio_obj_out_input_attach(out, in);
if (!ret) {
printf("Could not attach input");
goto end;
}
ecore_main_loop_begin();
end:
ecore_audio_shutdown();
ecore_shutdown();
return 0;
}
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