static int set_volume(struct action_event *event) {
const char *volume = upnp_get_string(event, "DesiredVolume");
service_lock();
int volume_level = atoi(volume); // range 0..100
if (volume_level < volume_range.min) volume_level = volume_range.min;
if (volume_level > volume_range.max) volume_level = volume_range.max;
const float decibel = volume_level_to_decibel(volume_level);
char db_volume[10];
snprintf(db_volume, sizeof(db_volume), "%d", (int) (256 * decibel));
Log_info("control", "Setting %d volume-db to %d" , volume_level,(int)decibel);
const double fraction = exp(decibel / 20 * log(10));
change_volume(volume, db_volume);
output_set_volume(fraction, volume_level);
set_mute_toggle(volume_level == 0);
service_unlock();
return 0;
}
static int set_next_avtransport_uri(struct action_event *event)
{
int rc = 0;
char *value;
ENTER();
if (obtain_instanceid(event, NULL)) {
LEAVE();
return -1;
}
value = upnp_get_string(event, "NextURI");
if (value == NULL) {
LEAVE();
return -1;
}
service_lock();
output_set_next_uri(value);
change_var_and_notify(TRANSPORT_VAR_NEXT_AV_URI, value);
printf("%s: NextURI='%s'\n", __FUNCTION__, value);
free(value);
value = upnp_get_string(event, "NextURIMetaData");
if (value == NULL) {
rc = -1;
} else {
change_var_and_notify(TRANSPORT_VAR_NEXT_AV_URI_META, value);
free(value);
}
service_unlock();
LEAVE();
return rc;
}
static int stop(struct action_event *event)
{
ENTER();
if (obtain_instanceid(event, NULL)) {
return -1;
}
service_lock();
switch (transport_state_) {
case TRANSPORT_STOPPED:
// For clients that didn't get it.
change_and_notify_transport(TRANSPORT_STOPPED);
break;
case TRANSPORT_PLAYING:
case TRANSPORT_TRANSITIONING:
case TRANSPORT_PAUSED_RECORDING:
case TRANSPORT_RECORDING:
case TRANSPORT_PAUSED_PLAYBACK:
output_stop();
change_and_notify_transport(TRANSPORT_STOPPED);
// Set TransportPlaySpeed to '1'
break;
case TRANSPORT_NO_MEDIA_PRESENT:
/* action not allowed in these states - error 701 */
upnp_set_error(event, UPNP_TRANSPORT_E_TRANSITION_NA,
"Transition not allowed");
break;
}
service_unlock();
LEAVE();
return 0;
}
static int get_position_info(struct action_event *event)
{
int rc;
ENTER();
if (obtain_instanceid(event, NULL)) {
rc = -1;
goto out;
}
gint64 duration, position;
service_lock();
const int pos_result = output_get_position(&duration, &position);
service_unlock();
if (pos_result == 0) {
char tbuf[32];
print_upnp_time_into_buffer(tbuf, sizeof(tbuf), duration);
replace_var(TRANSPORT_VAR_CUR_TRACK_DUR, tbuf);
print_upnp_time_into_buffer(tbuf, sizeof(tbuf), position);
replace_var(TRANSPORT_VAR_REL_TIME_POS, tbuf);
}
rc = upnp_append_variable(event, TRANSPORT_VAR_CUR_TRACK, "Track");
if (rc)
goto out;
rc = upnp_append_variable(event, TRANSPORT_VAR_CUR_TRACK_DUR,
"TrackDuration");
if (rc)
goto out;
rc = upnp_append_variable(event, TRANSPORT_VAR_CUR_TRACK_META,
"TrackMetaData");
if (rc)
goto out;
rc = upnp_append_variable(event, TRANSPORT_VAR_CUR_TRACK_URI,
"TrackURI");
if (rc)
goto out;
rc = upnp_append_variable(event, TRANSPORT_VAR_REL_TIME_POS,
"RelTime");
if (rc)
goto out;
rc = upnp_append_variable(event, TRANSPORT_VAR_ABS_TIME_POS,
"AbsTime");
if (rc)
goto out;
rc = upnp_append_variable(event, TRANSPORT_VAR_REL_CTR_POS,
"RelCount");
if (rc)
goto out;
rc = upnp_append_variable(event, TRANSPORT_VAR_ABS_CTR_POS,
"AbsCount");
if (rc)
goto out;
out:
LEAVE();
return rc;
}
