diff options
Diffstat (limited to 'hal-volramp.c')
| -rw-r--r-- | hal-volramp.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/hal-volramp.c b/hal-volramp.c new file mode 100644 index 0000000..a56816c --- /dev/null +++ b/hal-volramp.c @@ -0,0 +1,189 @@ +/* + * 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) { + AFB_NOTICE("RampTimerCB Done tag=%d target=%d", Master_Playback_Volume, volRamp->current); + sd_event_source_unref(source); + return 0; + } + + // 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; +} |