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author | 2017-10-24 22:11:21 +0200 | |
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committer | 2017-10-24 22:11:21 +0200 | |
commit | 036268ddd8c62114faf9afd4da3c35ffa2b6ecba (patch) | |
tree | 72429524bb9e4be47b760915a674e6473e305026 /HAL-afb/HAL-interface/hal-volume.c | |
parent | 2fd0fa8c77dbaaf40ba0812e43b6637ff1d1d76e (diff) |
Initial working version as independent repo
Diffstat (limited to 'HAL-afb/HAL-interface/hal-volume.c')
-rw-r--r-- | HAL-afb/HAL-interface/hal-volume.c | 150 |
1 files changed, 0 insertions, 150 deletions
diff --git a/HAL-afb/HAL-interface/hal-volume.c b/HAL-afb/HAL-interface/hal-volume.c deleted file mode 100644 index 997ce98..0000000 --- a/HAL-afb/HAL-interface/hal-volume.c +++ /dev/null @@ -1,150 +0,0 @@ -/* - * 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. - * - * references: - * alsa-util/amixer.c + alsa-lib/simple.c - * snd_tlv_convert_from_dB - * nt snd_tlv_convert_to_dB - * snd_tlv_get_dB_range - */ - -#define _GNU_SOURCE // needed for vasprintf -#include <math.h> -#include "hal-interface.h" - -typedef enum { - NORMALIZE_NONE = 0, - NORMALIZE_DB_LINEAR, - NORMALIZE_DB_MATH, - NORMALIZE_LINEAR, -} enumRandeModeDB_T; - - -// Return Value express from 0-100% - -STATIC int dbNormalizeVal(enumRandeModeDB_T normaliseMode, const alsaHalDBscaleT *dbscale, int value) { - double normalized, min_norm; - - // To get real DB from TLV DB values should be divided by 100 - switch (normaliseMode) { - case NORMALIZE_DB_LINEAR: - normalized = ((double) (value - dbscale->min) / (double) (dbscale->max - dbscale->min)); - break; - - case NORMALIZE_DB_MATH: - normalized = exp10((double) (value - dbscale->max) / 6000.0); - if (dbscale->min != SND_CTL_TLV_DB_GAIN_MUTE) { - min_norm = exp10((double) (dbscale->min - dbscale->max) / 20); - normalized = (normalized - min_norm) / (1 - min_norm); - } - - break; - - default: - normalized = 0; - } - - return (int) round(normalized * 100); -} - -// HAL normalise volume values to 0-100% - -PUBLIC json_object *volumeNormalise(ActionSetGetT action, const alsaHalCtlMapT *halCtls, json_object *valuesJ) { - enumRandeModeDB_T useNormalizeDB; - int length; - - // If Integer look for DBscale - if (halCtls->type == SND_CTL_ELEM_TYPE_INTEGER) { - - // If not valid db_scale let's use raw_scale - if (!halCtls->dbscale || (halCtls->dbscale->min >= halCtls->dbscale->max)) { - - // dbscale is invalid let's try raw range - if (halCtls->minval >= halCtls->maxval) goto ExitOnError; - - // Use Raw Scale Model - useNormalizeDB = NORMALIZE_LINEAR; - - } else { // db_scale looks OK let's use it - if ((halCtls->dbscale->max - halCtls->dbscale->min) <= MAX_LINEAR_DB_SCALE * 100) useNormalizeDB = NORMALIZE_DB_LINEAR; - else useNormalizeDB = NORMALIZE_LINEAR; // Fulup not sure how to handle this useNormalizeDB=NORMALIZE_DB_MATH; - } - } else useNormalizeDB = NORMALIZE_NONE; - - - // loop on values to normalise - enum json_type jtype = json_object_get_type(valuesJ); - if (jtype == json_type_array) length = json_object_array_length(valuesJ); - else length = 1; - - json_object *normalisedJ = json_object_new_array(); - for (int idx = 0; idx < length; idx++) { - int value; - - if (jtype == json_type_array) { - json_object *valueJ = json_object_array_get_idx(valuesJ, idx); - value = json_object_get_int(valueJ); - } else { - value = json_object_get_int(valuesJ); - } - - // If Integer scale to 0/100 - if (halCtls->type == SND_CTL_ELEM_TYPE_INTEGER) { - - switch (action) { - - case ACTION_GET: - switch (useNormalizeDB) { - case NORMALIZE_LINEAR: - value = 100 * (value - halCtls->minval) / (halCtls->maxval - halCtls->minval); - break; - case NORMALIZE_DB_MATH: //ToBeDone - value = dbNormalizeVal(useNormalizeDB, halCtls->dbscale, value); - break; - case NORMALIZE_NONE: - default: - value = value; - } - break; - - case ACTION_SET: - switch (useNormalizeDB) { - case NORMALIZE_LINEAR: - value = (value * (halCtls->maxval - halCtls->minval)) / 100; - break; - case NORMALIZE_DB_MATH: //ToBeDone - value = dbNormalizeVal(useNormalizeDB, halCtls->dbscale, value); - break; - case NORMALIZE_NONE: - default: - value = value; - } - break; - - default: - AFB_NOTICE("volumeNormalise: invalid action value=%d", (int) action); - goto ExitOnError; - } - } - - json_object_array_add(normalisedJ, json_object_new_int(value)); - } - - return (normalisedJ); - -ExitOnError: - return NULL; -} |