static void
xmms_eq_gain_changed (xmms_object_t *object, xmmsv_t *_data,
gpointer userdata)
{
xmms_config_property_t *val;
xmms_equalizer_data_t *priv;
const gchar *name;
gint i;
gfloat gain;
g_return_if_fail (object);
g_return_if_fail (userdata);
val = (xmms_config_property_t *) object;
priv = userdata;
name = xmms_config_property_get_name (val);
XMMS_DBG ("gain value changed! %s => %f", name,
xmms_config_property_get_float (val));
gain = xmms_config_property_get_float (val);
if (gain < -20.0 || gain > 20.0) {
gchar buf[20];
gain = CLAMP (gain, -20.0, 20.0);
g_snprintf (buf, sizeof (buf), "%g", gain);
xmms_config_property_set_data (val, buf);
}
/* we are passed the full config key, not just the last token,
* which makes this code kinda ugly.
* fix when bug 97 has been resolved
*/
name = strrchr (name, '.') + 1;
if (!strcmp (name, "preamp")) {
/* scale the -20.0 - 20.0 value to correct one */
for (i=0; i<EQ_CHANNELS; i++) {
set_preamp (i, xmms_eq_gain_scale (gain, TRUE));
}
} else {
gint band = -1;
if (!strncmp (name, "gain", 4) && !priv->use_legacy) {
band = atoi (name + 4);
} else if (!strncmp (name, "legacy", 6) && priv->use_legacy) {
band = atoi (name + 6);
}
if (band >= 0) {
/* scale the -20.0 - 20.0 value to correct one */
for (i=0; i<EQ_CHANNELS; i++) {
set_gain (band, i, xmms_eq_gain_scale (gain, FALSE));
}
}
}
}
void set_eq_value(float value, int index, int chn)
{
/* Map the gain and preamp values */
if (index >= 0)
{
set_gain(index, chn, 2.5220207857061455181125E-01 * exp(8.0178361802353992349168E-02 * value) - 2.5220207852836562523180E-01 , value);
}
else
{
/* -12dB .. 12dB mapping */
set_preamp(chn, 9.9999946497217584440165E-01 * exp(6.9314738656671842642609E-02 * value) + 3.7119444716771825623636E-07);
}
}
static gboolean
xmms_eq_init (xmms_xform_t *xform)
{
xmms_equalizer_data_t *priv;
xmms_config_property_t *config;
gint i, j, srate;
gfloat gain;
g_return_val_if_fail (xform, FALSE);
priv = g_new0 (xmms_equalizer_data_t, 1);
g_return_val_if_fail (priv, FALSE);
xmms_xform_private_data_set (xform, priv);
config = xmms_xform_config_lookup (xform, "enabled");
g_return_val_if_fail (config, FALSE);
xmms_config_property_callback_set (config, xmms_eq_config_changed, priv);
priv->enabled = !!xmms_config_property_get_int (config);
config = xmms_xform_config_lookup (xform, "bands");
g_return_val_if_fail (config, FALSE);
xmms_config_property_callback_set (config, xmms_eq_config_changed, priv);
priv->bands = xmms_config_property_get_int (config);
config = xmms_xform_config_lookup (xform, "extra_filtering");
g_return_val_if_fail (config, FALSE);
xmms_config_property_callback_set (config, xmms_eq_config_changed, priv);
priv->extra_filtering = xmms_config_property_get_int (config);
config = xmms_xform_config_lookup (xform, "use_legacy");
g_return_val_if_fail (config, FALSE);
xmms_config_property_callback_set (config, xmms_eq_config_changed, priv);
priv->use_legacy = xmms_config_property_get_int (config);
config = xmms_xform_config_lookup (xform, "preamp");
g_return_val_if_fail (config, FALSE);
xmms_config_property_callback_set (config, xmms_eq_gain_changed, priv);
gain = xmms_config_property_get_float (config);
for (i=0; i<EQ_CHANNELS; i++) {
set_preamp (i, xmms_eq_gain_scale (gain, TRUE));
}
for (i=0; i<EQ_BANDS_LEGACY; i++) {
gchar buf[16];
g_snprintf (buf, sizeof (buf), "legacy%d", i);
config = xmms_xform_config_lookup (xform, buf);
g_return_val_if_fail (config, FALSE);
priv->legacy[i] = config;
xmms_config_property_callback_set (config, xmms_eq_gain_changed, priv);
gain = xmms_config_property_get_float (config);
if (priv->use_legacy) {
for (j = 0; j < EQ_CHANNELS; j++) {
set_gain (i, j, xmms_eq_gain_scale (gain, FALSE));
}
}
}
for (i=0; i<EQ_MAX_BANDS; i++) {
gchar buf[16];
g_snprintf (buf, sizeof (buf), "gain%02d", i);
config = xmms_xform_config_lookup (xform, buf);
g_return_val_if_fail (config, FALSE);
priv->gain[i] = config;
xmms_config_property_callback_set (config, xmms_eq_gain_changed, priv);
gain = xmms_config_property_get_float (config);
if (!priv->use_legacy) {
for (j = 0; j < EQ_CHANNELS; j++) {
set_gain (i, j, xmms_eq_gain_scale (gain, FALSE));
}
}
}
init_iir ();
srate = xmms_xform_indata_get_int (xform, XMMS_STREAM_TYPE_FMT_SAMPLERATE);
if (priv->use_legacy) {
config_iir (srate, EQ_BANDS_LEGACY, 1);
} else {
config_iir (srate, priv->bands, 0);
}
xmms_xform_outdata_type_copy (xform);
XMMS_DBG ("Equalizer initialized successfully!");
return TRUE;
}
