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/*
* Copyright (C) 2016 "IoT.bzh"
* Author Fulup Ar Foll <fulup@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#define _GNU_SOURCE // needed for vasprintf
#include "hal-interface.h"
STATIC int RampTimerCB(sd_event_source* source, uint64_t timer, void* handle) {
halVolRampT *volRamp = (halVolRampT*) handle;
int err;
uint64_t usec;
// RampDown
if (volRamp->current > volRamp->target) {
volRamp->current = volRamp->current - volRamp->stepDown;
if (volRamp->current < volRamp->target) volRamp->current = volRamp->target;
}
// RampUp
if (volRamp->current < volRamp->target) {
volRamp->current = volRamp->current + volRamp->stepUp;
if (volRamp->current > volRamp->target) volRamp->current = volRamp->target;
}
// request current Volume Level
err = halSetCtlByTag(volRamp->slave, volRamp->current);
if (err) goto OnErrorExit;
// we reach target stop volram event
if (volRamp->current == volRamp->target) sd_event_source_unref(source);
else {
// otherwise validate timer for a new run
sd_event_now(afb_daemon_get_event_loop(), CLOCK_MONOTONIC, &usec);
sd_event_source_set_enabled(source, SD_EVENT_ONESHOT);
err = sd_event_source_set_time(source, usec + volRamp->delay);
}
return 0;
OnErrorExit:
AFB_WARNING("RampTimerCB Fail to set HAL ctl tag=%d vol=%d", Master_Playback_Volume, volRamp->current);
sd_event_source_unref(source); // abandon VolRamp
return -1;
}
STATIC void SetRampTimer(void *handle) {
halVolRampT *volRamp = (halVolRampT*) handle;
uint64_t usec;
// set a timer with ~250us accuracy
sd_event_now(afb_daemon_get_event_loop(), CLOCK_MONOTONIC, &usec);
sd_event_add_time(afb_daemon_get_event_loop(), &volRamp->evtsrc, CLOCK_MONOTONIC, usec, 250, RampTimerCB, volRamp);
}
STATIC int volumeDoRamp(halVolRampT *volRamp, int numid, json_object *volumeJ) {
json_object *responseJ;
// request current Volume Level
responseJ = halGetCtlByTag(volRamp->slave);
if (!responseJ) {
AFB_WARNING("volumeDoRamp Fail to get HAL ctl tag=%d", Master_Playback_Volume);
goto OnErrorExit;
}
// use 1st volume value as target for ramping
switch (json_object_get_type(volumeJ)) {
case json_type_array:
volRamp->target = json_object_get_int(json_object_array_get_idx(volumeJ, 0));
break;
case json_type_int:
volRamp->target = json_object_get_int(volumeJ);
break;
default:
AFB_WARNING("volumeDoRamp Invalid volumeJ=%s", json_object_get_string(volumeJ));
goto OnErrorExit;
}
// use 1st volume value as current for ramping
switch (json_object_get_type(responseJ)) {
case json_type_array:
volRamp->current = json_object_get_int(json_object_array_get_idx(responseJ, 0));
break;
case json_type_int:
volRamp->current = json_object_get_int(responseJ);
break;
default:
AFB_WARNING("volumeDoRamp Invalid reponseJ=%s", json_object_get_string(responseJ));
goto OnErrorExit;
}
SetRampTimer(volRamp);
return 0;
OnErrorExit:
return -1;
}
PUBLIC void volumeRamp(halCtlsTagT halTag, alsaHalCtlMapT *ctl, void* handle, json_object *valJ) {
halVolRampT *volRamp = (halVolRampT*) handle;
json_object *tmpJ;
if (json_object_get_type(valJ) != json_type_array || volRamp == NULL) goto OnErrorExit;
switch (halTag) {
// Only config use wellknown tag. Default is DoVolRamp
default:
tmpJ = json_object_array_get_idx(valJ, 0);
volumeDoRamp(volRamp, ctl->numid, tmpJ);
break;
case Vol_Ramp_Set_Mode:
tmpJ = json_object_array_get_idx(valJ, 0);
volRamp->mode = json_object_get_int(tmpJ);
switch (volRamp->mode) {
case RAMP_VOL_SMOOTH:
volRamp->delay = 100 * 1000;
volRamp->stepDown = 1;
volRamp->stepUp = 1;
break;
case RAMP_VOL_NORMAL:
volRamp->delay = 100 * 1000;
volRamp->stepDown = 3;
volRamp->stepUp = 2;
break;
case RAMP_VOL_EMERGENCY:
volRamp->delay = 50 * 1000;
volRamp->stepDown = 6;
volRamp->stepUp = 2;
break;
default:
goto OnErrorExit;
}
break;
case Vol_Ramp_Set_Slave:
tmpJ = json_object_array_get_idx(valJ, 0);
volRamp->slave = json_object_get_int(tmpJ);
break;
case Vol_Ramp_Set_Delay:
tmpJ = json_object_array_get_idx(valJ, 0);
volRamp->delay = 1000 * json_object_get_int(tmpJ);
break;
case Vol_Ramp_Set_Down:
tmpJ = json_object_array_get_idx(valJ, 0);
volRamp->stepDown = json_object_get_int(tmpJ);
break;
case Vol_Ramp_Set_Up:
tmpJ = json_object_array_get_idx(valJ, 0);
volRamp->stepUp = json_object_get_int(tmpJ);
break;
}
return;
OnErrorExit:
AFB_WARNING("volumeRamp: Invalid Ctrl Event halCtlsTagT=%d numid=%d name=%s value=%s", halTag, ctl->numid, ctl->name, json_object_get_string(valJ));
return;
}
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