static int control(struct af_instance *af, int cmd, void *arg)
{
struct priv *p = af->priv;
switch (cmd) {
case AF_CONTROL_REINIT: {
struct mp_audio *in = arg;
struct mp_audio orig_in = *in;
struct mp_audio *out = af->data;
in->format = AF_FORMAT_FLOATP;
mp_audio_copy_config(out, in);
if (p->rubber)
rubberband_delete(p->rubber);
int opts = p->opt_transients | p->opt_detector | p->opt_phase |
p->opt_window | p->opt_smoothing | p->opt_formant |
p->opt_pitch | p-> opt_channels |
RubberBandOptionProcessRealTime;
p->rubber = rubberband_new(in->rate, in->channels.num, opts, 1.0, 1.0);
if (!p->rubber) {
MP_FATAL(af, "librubberband initialization failed.\n");
return AF_ERROR;
}
update_speed(af, p->speed);
update_pitch(af, p->pitch);
control(af, AF_CONTROL_RESET, NULL);
return mp_audio_config_equals(in, &orig_in) ? AF_OK : AF_FALSE;
}
case AF_CONTROL_SET_PLAYBACK_SPEED: {
update_speed(af, *(double *)arg);
return AF_OK;
}
case AF_CONTROL_RESET:
if (p->rubber)
rubberband_reset(p->rubber);
talloc_free(p->pending);
p->pending = NULL;
p->rubber_delay = 0;
return AF_OK;
case AF_CONTROL_COMMAND: {
char **args = arg;
if (!strcmp(args[0], "set-pitch")) {
char *endptr;
double pitch = strtod(args[1], &endptr);
if (*endptr || pitch < 0.01 || pitch > 100.0)
return CONTROL_ERROR;
update_pitch(af, pitch);
return CONTROL_OK;
} else {
return CONTROL_ERROR;
}
}
}
return AF_UNKNOWN;
}
int alogg_play_ogg_ts(ALOGG_OGG *ogg, int buffer_len, int vol, int pan, int speed) {
int ret;
/* start playing Ogg at normal speed */
ret = alogg_play_ex_ogg(ogg, buffer_len, vol, pan, 1000, 0);
if (ret != ALOGG_OK)
return ret;
/* don't set up time stretching if we are playing at normal speed */
if (speed == 1000)
return ALOGG_OK;
ogg->time_stretch = 1;
ogg->time_stretch_buffer_samples = (buffer_len / (ogg->stereo ? 2 : 1)) / 2;
ogg->time_stretch_state = rubberband_new(ogg->freq, ogg->stereo ? 2 : 1, RubberBandOptionProcessRealTime | RubberBandOptionThreadingNever, 1000.0 / (float)speed, 1.0);
rubberband_set_max_process_size(ogg->time_stretch_state, ogg->time_stretch_buffer_samples);
ogg->time_stretch_buffer[0] = malloc(sizeof(float) * ogg->time_stretch_buffer_samples);
if (ogg->stereo)
ogg->time_stretch_buffer[1] = malloc(sizeof(float) * ogg->time_stretch_buffer_samples);
else
ogg->time_stretch_buffer[1] = NULL;
return ALOGG_OK;
}
static gint rubberband_init(DenemoPrefs *config) {
rubberband = rubberband_new(sample_rate, 2 /* channels */, RubberBandOptionProcessRealTime | RubberBandOptionStretchPrecise,
slowdown, 1.0);
//rubberband_set_debug_level(rubberband, 3);
return 0;
}