diff options
Diffstat (limited to 'Alsa-afb/Alsa-SetGet.c')
| -rw-r--r-- | Alsa-afb/Alsa-SetGet.c | 815 |
1 files changed, 0 insertions, 815 deletions
diff --git a/Alsa-afb/Alsa-SetGet.c b/Alsa-afb/Alsa-SetGet.c deleted file mode 100644 index f70c5d6..0000000 --- a/Alsa-afb/Alsa-SetGet.c +++ /dev/null @@ -1,815 +0,0 @@ -/* - * AlsaLibMapping -- provide low level interface with ALSA lib (extracted from alsa-json-gateway code) - * Copyright (C) 2015,2016,2017, 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: - https://github.com/fulup-bzh/AlsaJsonGateway (original code) - http://alsa-lib.sourcearchive.com/documentation/1.0.20/modules.html - http://alsa-lib.sourcearchive.com/documentation/1.0.8/group__Control_gd48d44da8e3bfe150e928267008b8ff5.html - http://alsa.opensrc.org/HowTo_access_a_mixer_control - https://github.com/gch1p/alsa-volume-monitor/blob/master/main.c - https://github.com/DongheonKim/android_hardware_alsa-sound/blob/master/ALSAControl.cpp (ALSA low level API) - https://www.kernel.org/doc/html/v4.11/sound/index.html - - */ - -#define _GNU_SOURCE // needed for vasprintf -#include "Alsa-ApiHat.h" - -PUBLIC void NumidsListParse(ActionSetGetT action, queryValuesT *queryValues, ctlRequestT *ctlRequest) { - int length; - - for (int idx = 0; idx < queryValues->count; idx++) { - json_object *jId, *valuesJ; - ctlRequest[idx].used = 0; - ctlRequest[idx].valuesJ = NULL; - - // when only one NUMID is provided it might not be encapsulated in a JSON array - if (json_type_array == json_object_get_type(queryValues->numidsJ)) ctlRequest[idx].jToken = json_object_array_get_idx(queryValues->numidsJ, idx); - else ctlRequest[idx].jToken = queryValues->numidsJ; - - enum json_type jtype = json_object_get_type(ctlRequest[idx].jToken); - switch (jtype) { - - case json_type_int: - // if NUMID is not an array then it should be an integer numid with no value - ctlRequest[idx].numId = json_object_get_int(ctlRequest[idx].jToken); - - // Special SET simple short numid form [numid, [VAL1...VALX]] - if (action == ACTION_SET && queryValues->count == 2) { - ctlRequest[idx].valuesJ = json_object_array_get_idx(queryValues->numidsJ, 1); - queryValues->count = 1; //In this form count==2 , when only one numid is to set - idx++; - continue; - } else - break; - - case json_type_array: - // NUMID is an array 1st slot should be numid, optionally values may come after - length = json_object_array_length(ctlRequest[idx].jToken); - - // numid must be in 1st slot of numid json array - ctlRequest[idx].numId = json_object_get_int(json_object_array_get_idx(ctlRequest[idx].jToken, 0)); - if (action == ACTION_GET) continue; - - // In Write mode second value should be the value - if (action == ACTION_SET && length == 2) { - ctlRequest[idx].valuesJ = json_object_array_get_idx(ctlRequest[idx].jToken, 1); - continue; - } - - // no numid value - ctlRequest[idx].used = -1; - break; - - case json_type_object: - // numid+values formated as {id:xxx, val:[aa,bb...,nn]} - if (!json_object_object_get_ex(ctlRequest[idx].jToken, "id", &jId)) { - AFB_NOTICE("Invalid Json=%s missing 'id'", json_object_get_string(ctlRequest[idx].jToken)); - ctlRequest[idx].used = -1; - } else { - ctlRequest[idx].numId = json_object_get_int(jId); - if (action == ACTION_SET) { - if (!json_object_object_get_ex(ctlRequest[idx].jToken, "val", &valuesJ)) { - AFB_NOTICE("Invalid Json=%s missing 'val'", json_object_get_string(ctlRequest[idx].jToken)); - ctlRequest[idx].used = -1; - } else - ctlRequest[idx].valuesJ = valuesJ; - } - } - break; - - default: - ctlRequest[idx].used = -1; - } - } -} - -STATIC json_object *DB2StringJsonOject(long dB) { - char label [20]; - if (dB < 0) { - snprintf(label, sizeof (label), "-%li.%02lidB", -dB / 100, -dB % 100); - } else { - snprintf(label, sizeof (label), "%li.%02lidB", dB / 100, dB % 100); - } - - // json function takes care of string copy - return (json_object_new_string(label)); -} - - -// Direct port from amixer TLV decode routine. This code is too complex for me. -// I hopefully did not break it when porting it. - -STATIC json_object *decodeTlv(unsigned int *tlv, unsigned int tlv_size, int mode) { - char label[20]; - unsigned int type = tlv[0]; - unsigned int size; - unsigned int idx = 0; - const char *chmap_type = NULL; - json_object * decodeTlvJson = json_object_new_object(); - - if (tlv_size < (unsigned int) (2 * sizeof (unsigned int))) { - printf("TLV size error!\n"); - return NULL; - } - type = tlv[idx++]; - size = tlv[idx++]; - tlv_size -= (unsigned int) (2 * sizeof (unsigned int)); - if (size > tlv_size) { - fprintf(stderr, "TLV size error (%i, %i, %i)!\n", type, size, tlv_size); - return NULL; - } - switch (type) { - - case SND_CTL_TLVT_CONTAINER: - { - json_object * containerJson = json_object_new_array(); - - size += (unsigned int) (sizeof (unsigned int) - 1); - size /= (unsigned int) (sizeof (unsigned int)); - while (idx < size) { - json_object *embedJson; - - if (tlv[idx + 1] > (size - idx) * sizeof (unsigned int)) { - fprintf(stderr, "TLV size error in compound!\n"); - return NULL; - } - embedJson = decodeTlv(tlv + idx, tlv[idx + 1] + 8, mode); - json_object_array_add(containerJson, embedJson); - idx += (unsigned int) (2 + (tlv[idx + 1] + sizeof (unsigned int) - 1) / sizeof (unsigned int)); - } - json_object_object_add(decodeTlvJson, "container", containerJson); - break; - } - - case SND_CTL_TLVT_DB_SCALE: - { - json_object * dbscaleJson = json_object_new_object(); - - if (size != 2 * sizeof (unsigned int)) { - json_object * arrayJson = json_object_new_array(); - while (size > 0) { - if (mode >= QUERY_VERBOSE) { - snprintf(label, sizeof (label), "0x%08x,", tlv[idx++]); - json_object_array_add(arrayJson, json_object_new_string(label)); - } else { - json_object_array_add(arrayJson, json_object_new_int(tlv[idx++])); - } - size -= (unsigned int) sizeof (unsigned int); - } - json_object_object_add(dbscaleJson, "array", arrayJson); - } else { - if (mode >= QUERY_VERBOSE) { - json_object_object_add(dbscaleJson, "min", DB2StringJsonOject((int) tlv[2])); - json_object_object_add(dbscaleJson, "step", DB2StringJsonOject(tlv[3] & 0xffff)); - json_object_object_add(dbscaleJson, "mute", DB2StringJsonOject((tlv[3] >> 16) & 1)); - } else { - json_object_object_add(dbscaleJson, "min", json_object_new_int((int) tlv[2])); - json_object_object_add(dbscaleJson, "step", json_object_new_int(tlv[3] & 0xffff)); - json_object_object_add(dbscaleJson, "mute", json_object_new_int((tlv[3] >> 16) & 1)); - } - } - json_object_object_add(decodeTlvJson, "dbscale", dbscaleJson); - break; - } - -#ifdef SND_CTL_TLVT_DB_LINEAR - case SND_CTL_TLVT_DB_LINEAR: - { - json_object * dbLinearJson = json_object_new_object(); - - if (size != 2 * sizeof (unsigned int)) { - json_object * arrayJson = json_object_new_array(); - while (size > 0) { - if (mode >= QUERY_VERBOSE) { - snprintf(label, sizeof (label), "0x%08x,", tlv[idx++]); - json_object_array_add(arrayJson, json_object_new_string(label)); - } else { - json_object_array_add(arrayJson, json_object_new_int(tlv[idx++])); - } - size -= (unsigned int) sizeof (unsigned int); - } - json_object_object_add(dbLinearJson, "offset", arrayJson); - } else { - if (mode >= QUERY_VERBOSE) { - json_object_object_add(dbLinearJson, "min", DB2StringJsonOject((int) tlv[2])); - json_object_object_add(dbLinearJson, "max", DB2StringJsonOject((int) tlv[3])); - } else { - json_object_object_add(dbLinearJson, "min", json_object_new_int((int) tlv[2])); - json_object_object_add(dbLinearJson, "max", json_object_new_int((int) tlv[3])); - } - } - json_object_object_add(decodeTlvJson, "dblinear", dbLinearJson); - break; - } -#endif - -#ifdef SND_CTL_TLVT_DB_RANGE - case SND_CTL_TLVT_DB_RANGE: - { - json_object *dbRangeJson = json_object_new_object(); - - if ((size % (6 * sizeof (unsigned int))) != 0) { - json_object *arrayJson = json_object_new_array(); - while (size > 0) { - if (mode >= QUERY_VERBOSE) { - snprintf(label, sizeof (label), "0x%08x,", tlv[idx++]); - json_object_array_add(arrayJson, json_object_new_string(label)); - } else { - json_object_array_add(arrayJson, json_object_new_int(tlv[idx++])); - } - size -= (unsigned int) sizeof (unsigned int); - } - json_object_object_add(dbRangeJson, "dbrange", arrayJson); - break; - } - while (size > 0) { - json_object * embedJson = json_object_new_object(); - json_object_object_add(embedJson, "rangemin", json_object_new_int(tlv[idx++])); - json_object_object_add(embedJson, "rangemax", json_object_new_int(tlv[idx++])); - embedJson = decodeTlv(tlv + idx, 4 * sizeof (unsigned int), mode); - json_object_object_add(embedJson, "tlv", embedJson); - idx += 4; - size -= (unsigned int) (6 * sizeof (unsigned int)); - json_object_array_add(dbRangeJson, embedJson); - } - json_object_object_add(decodeTlvJson, "dbrange", dbRangeJson); - break; - } -#endif -#ifdef SND_CTL_TLVT_DB_MINMAX - case SND_CTL_TLVT_DB_MINMAX: - case SND_CTL_TLVT_DB_MINMAX_MUTE: - { - json_object * dbMinMaxJson = json_object_new_object(); - - if (size != 2 * sizeof (unsigned int)) { - json_object * arrayJson = json_object_new_array(); - while (size > 0) { - if (mode >= QUERY_VERBOSE) { - snprintf(label, sizeof (label), "0x%08x,", tlv[idx++]); - json_object_array_add(arrayJson, json_object_new_string(label)); - } else { - json_object_array_add(arrayJson, json_object_new_int(tlv[idx++])); - } - size -= (unsigned int) sizeof (unsigned int); - } - json_object_object_add(dbMinMaxJson, "array", arrayJson); - - } else { - if (mode >= QUERY_VERBOSE) { - json_object_object_add(dbMinMaxJson, "min", DB2StringJsonOject((int) tlv[2])); - json_object_object_add(dbMinMaxJson, "max", DB2StringJsonOject((int) tlv[3])); - } else { - json_object_object_add(dbMinMaxJson, "min", json_object_new_int((int) tlv[2])); - json_object_object_add(dbMinMaxJson, "max", json_object_new_int((int) tlv[3])); - } - } - - if (type == SND_CTL_TLVT_DB_MINMAX_MUTE) { - json_object_object_add(decodeTlvJson, "dbminmaxmute", dbMinMaxJson); - } else { - json_object_object_add(decodeTlvJson, "dbminmax", dbMinMaxJson); - } - break; - } -#endif -#ifdef SND_CTL_TLVT_CHMAP_FIXED - case SND_CTL_TLVT_CHMAP_FIXED: - chmap_type = "fixed"; - /* Fall through */ - case SND_CTL_TLVT_CHMAP_VAR: - if (!chmap_type) - chmap_type = "variable"; - /* Fall through */ - case SND_CTL_TLVT_CHMAP_PAIRED: - if (!chmap_type) - chmap_type = "paired"; - - json_object * chmapJson = json_object_new_object(); - json_object * arrayJson = json_object_new_array(); - - while (size > 0) { - snprintf(label, sizeof (label), "%s", snd_pcm_chmap_name(tlv[idx++])); - size -= (unsigned int) sizeof (unsigned int); - json_object_array_add(arrayJson, json_object_new_string(label)); - } - json_object_object_add(chmapJson, chmap_type, arrayJson); - json_object_object_add(decodeTlvJson, "chmap", chmapJson); - break; -#endif - default: - { - printf("unk-%i-", type); - json_object * arrayJson = json_object_new_array(); - - while (size > 0) { - snprintf(label, sizeof (label), "0x%08x,", tlv[idx++]); - size -= (unsigned int) sizeof (unsigned int); - json_object_array_add(arrayJson, json_object_new_string(label)); - } - break; - json_object_object_add(decodeTlvJson, "unknown", arrayJson); - } - } - - return (decodeTlvJson); -} - - -// retreive info for one given card - -STATIC json_object* alsaCardProbe(const char *rqtSndId) { - const char *info, *name; - const char *devid, *driver; - json_object *ctlDev; - snd_ctl_t *handle; - snd_ctl_card_info_t *cardinfo; - int err; - - if ((err = snd_ctl_open(&handle, rqtSndId, 0)) < 0) { - AFB_INFO("alsaCardProbe '%s' Not Found", rqtSndId); - return NULL; - } - - snd_ctl_card_info_alloca(&cardinfo); - if ((err = snd_ctl_card_info(handle, cardinfo)) < 0) { - snd_ctl_close(handle); - AFB_WARNING("SndCard '%s' info error: %s", rqtSndId, snd_strerror(err)); - return NULL; - } - - // start a new json object to store card info - ctlDev = json_object_new_object(); - - devid = snd_ctl_card_info_get_id(cardinfo); - json_object_object_add(ctlDev, "devid", json_object_new_string(devid)); - name = snd_ctl_card_info_get_name(cardinfo); - json_object_object_add(ctlDev, "name", json_object_new_string(name)); - - if (AFB_GET_VERBOSITY > 1) { - json_object_object_add(ctlDev, "devid", json_object_new_string(rqtSndId)); - driver = snd_ctl_card_info_get_driver(cardinfo); - json_object_object_add(ctlDev, "driver", json_object_new_string(driver)); - info = strdup(snd_ctl_card_info_get_longname(cardinfo)); - json_object_object_add(ctlDev, "info", json_object_new_string(info)); - AFB_INFO("AJG: Soundcard Devid=%-5s devid=%-7s Name=%s\n", rqtSndId, devid, info); - } - - // free card handle and return info - snd_ctl_close(handle); - return (ctlDev); -} - -// Loop on every potential Sound card and register active one - -PUBLIC void alsaGetInfo(afb_req request) { - int card; - json_object *ctlDev, *ctlDevs; - char devid[32]; - - const char *rqtSndId = afb_req_value(request, "devid"); - - // if no specific card requested loop on all - - if (rqtSndId != NULL) { - // only one card was requested let's probe it - ctlDev = alsaCardProbe(rqtSndId); - if (ctlDev != NULL) afb_req_success(request, ctlDev, NULL); - else afb_req_fail_f(request, "sndscard-notfound", "SndCard '%s' Not Found", rqtSndId); - - } else { - // return an array of ctlDev - ctlDevs = json_object_new_array(); - - // loop on potential card number - for (card = 0; card < MAX_SND_CARD; card++) { - - // build card devid and probe it - snprintf(devid, sizeof (devid), "hw:%i", card); - ctlDev = alsaCardProbe(devid); - - // Alsa has hole within card list [ignore them] - if (ctlDev != NULL) { - // add current ctlDev to ctlDevs object - json_object_array_add(ctlDevs, ctlDev); - } - } - afb_req_success(request, ctlDevs, NULL); - } -} - -// pack Alsa element's ACL into a JSON object - -STATIC json_object *getControlAcl(snd_ctl_elem_info_t *info) { - - json_object * jsonAclCtl = json_object_new_object(); - - json_object_object_add(jsonAclCtl, "read", json_object_new_boolean(snd_ctl_elem_info_is_readable(info))); - json_object_object_add(jsonAclCtl, "write", json_object_new_boolean(snd_ctl_elem_info_is_writable(info))); - json_object_object_add(jsonAclCtl, "inact", json_object_new_boolean(snd_ctl_elem_info_is_inactive(info))); - json_object_object_add(jsonAclCtl, "volat", json_object_new_boolean(snd_ctl_elem_info_is_volatile(info))); - json_object_object_add(jsonAclCtl, "lock", json_object_new_boolean(snd_ctl_elem_info_is_locked(info))); - - // if TLV is readable we insert its ACL - if (!snd_ctl_elem_info_is_tlv_readable(info)) { - json_object * jsonTlv = json_object_new_object(); - - json_object_object_add(jsonTlv, "read", json_object_new_boolean(snd_ctl_elem_info_is_tlv_readable(info))); - json_object_object_add(jsonTlv, "write", json_object_new_boolean(snd_ctl_elem_info_is_tlv_writable(info))); - json_object_object_add(jsonTlv, "command", json_object_new_boolean(snd_ctl_elem_info_is_tlv_commandable(info))); - - json_object_object_add(jsonAclCtl, "tlv", jsonTlv); - } - return (jsonAclCtl); -} - -// process ALSA control and store resulting value into ctlRequest - -PUBLIC int alsaSetSingleCtl(snd_ctl_t *ctlDev, snd_ctl_elem_id_t *elemId, ctlRequestT *ctlRequest) { - snd_ctl_elem_value_t *elemData; - snd_ctl_elem_info_t *elemInfo; - int count, length, err, valueIsArray = 0; - - // let's make sure we are processing the right control - if (ctlRequest->numId != snd_ctl_elem_id_get_numid(elemId)) goto OnErrorExit; - - // set info event ID and get value - snd_ctl_elem_info_alloca(&elemInfo); - snd_ctl_elem_info_set_id(elemInfo, elemId); // map ctlInfo to ctlId elemInfo is updated !!! - if (snd_ctl_elem_info(ctlDev, elemInfo) < 0) { - AFB_NOTICE("Fail to load ALSA NUMID=%d Values='%s'", ctlRequest->numId, json_object_get_string(ctlRequest->valuesJ)); - goto OnErrorExit; - } - - if (!snd_ctl_elem_info_is_writable(elemInfo)) { - AFB_NOTICE("Not Writable ALSA NUMID=%d Values='%s'", ctlRequest->numId, json_object_get_string(ctlRequest->valuesJ)); - goto OnErrorExit; - } - - count = snd_ctl_elem_info_get_count(elemInfo); - if (count == 0) goto OnErrorExit; - - enum json_type jtype = json_object_get_type(ctlRequest->valuesJ); - switch (jtype) { - case json_type_array: - length = json_object_array_length(ctlRequest->valuesJ); - valueIsArray = 1; - break; - case json_type_int: - length = 1; - valueIsArray = 0; - break; - default: - length = 0; - break; - } - - - if (length == 0) { - AFB_NOTICE("Invalid values NUMID='%d' Values='%s' count='%d' wanted='%d'", ctlRequest->numId, json_object_get_string(ctlRequest->valuesJ), length, count); - goto OnErrorExit; - } - - snd_ctl_elem_value_alloca(&elemData); - snd_ctl_elem_value_set_id(elemData, elemId); // map ctlInfo to ctlId elemInfo is updated !!! - if (snd_ctl_elem_read(ctlDev, elemData) < 0) goto OnErrorExit; - - // Loop on every control value and push to sndcard - for (int index = 0; index < count; index++) { - json_object *element; - int value; - - // when not enough value duplicate last provided one - if (!valueIsArray) element = ctlRequest->valuesJ; - else { - if (index < length) element = json_object_array_get_idx(ctlRequest->valuesJ, index); - else element = json_object_array_get_idx(ctlRequest->valuesJ, length - 1); - } - - value = json_object_get_int(element); - snd_ctl_elem_value_set_integer(elemData, index, value); - } - - err = snd_ctl_elem_write(ctlDev, elemData); - if (err < 0) { - AFB_NOTICE("Fail to write ALSA NUMID=%d Values='%s' Error=%s", ctlRequest->numId, json_object_get_string(ctlRequest->valuesJ), snd_strerror(err)); - goto OnErrorExit; - } - - ctlRequest->used = 1; - return 0; - -OnErrorExit: - ctlRequest->used = -1; - return -1; -} - -// process ALSA control and store then into ctlRequest - -PUBLIC int alsaGetSingleCtl(snd_ctl_t *ctlDev, snd_ctl_elem_id_t *elemId, ctlRequestT *ctlRequest, halQueryMode queryMode) { - snd_ctl_elem_type_t elemType; - snd_ctl_elem_value_t *elemData; - snd_ctl_elem_info_t *elemInfo; - int count, idx, err; - - - // set info event ID and get value - - snd_ctl_elem_info_alloca(&elemInfo); - snd_ctl_elem_info_set_id(elemInfo, elemId); - if (snd_ctl_elem_info(ctlDev, elemInfo) < 0) goto OnErrorExit; - count = snd_ctl_elem_info_get_count(elemInfo); - if (count == 0) goto OnErrorExit; - - if (!snd_ctl_elem_info_is_readable(elemInfo)) goto OnErrorExit; - elemType = snd_ctl_elem_info_get_type(elemInfo); - - snd_ctl_elem_value_alloca(&elemData); - snd_ctl_elem_value_set_id(elemData, elemId); - if (snd_ctl_elem_read(ctlDev, elemData) < 0) goto OnErrorExit; - - int numid = snd_ctl_elem_info_get_numid(elemInfo); - - ctlRequest->valuesJ = json_object_new_object(); - json_object_object_add(ctlRequest->valuesJ, "id", json_object_new_int(numid)); - if (queryMode >= 1) json_object_object_add(ctlRequest->valuesJ, "name", json_object_new_string(snd_ctl_elem_id_get_name(elemId))); - if (queryMode >= 2) json_object_object_add(ctlRequest->valuesJ, "iface", json_object_new_string(snd_ctl_elem_iface_name(snd_ctl_elem_id_get_interface(elemId)))); - if (queryMode >= 3) json_object_object_add(ctlRequest->valuesJ, "actif", json_object_new_boolean(!snd_ctl_elem_info_is_inactive(elemInfo))); - - json_object *jsonValuesCtl = json_object_new_array(); - for (idx = 0; idx < count; idx++) { // start from one in amixer.c !!! - switch (elemType) { - case SND_CTL_ELEM_TYPE_BOOLEAN: - { - json_object_array_add(jsonValuesCtl, json_object_new_boolean(snd_ctl_elem_value_get_boolean(elemData, idx))); - break; - } - case SND_CTL_ELEM_TYPE_INTEGER: - json_object_array_add(jsonValuesCtl, json_object_new_int((int) snd_ctl_elem_value_get_integer(elemData, idx))); - break; - case SND_CTL_ELEM_TYPE_INTEGER64: - json_object_array_add(jsonValuesCtl, json_object_new_int64(snd_ctl_elem_value_get_integer64(elemData, idx))); - break; - case SND_CTL_ELEM_TYPE_ENUMERATED: - json_object_array_add(jsonValuesCtl, json_object_new_int(snd_ctl_elem_value_get_enumerated(elemData, idx))); - break; - case SND_CTL_ELEM_TYPE_BYTES: - json_object_array_add(jsonValuesCtl, json_object_new_int((int) snd_ctl_elem_value_get_byte(elemData, idx))); - break; - case SND_CTL_ELEM_TYPE_IEC958: - { - json_object *jsonIec958Ctl = json_object_new_object(); - snd_aes_iec958_t iec958; - snd_ctl_elem_value_get_iec958(elemData, &iec958); - - json_object_object_add(jsonIec958Ctl, "AES0", json_object_new_int(iec958.status[0])); - json_object_object_add(jsonIec958Ctl, "AES1", json_object_new_int(iec958.status[1])); - json_object_object_add(jsonIec958Ctl, "AES2", json_object_new_int(iec958.status[2])); - json_object_object_add(jsonIec958Ctl, "AES3", json_object_new_int(iec958.status[3])); - json_object_array_add(jsonValuesCtl, jsonIec958Ctl); - break; - } - default: - json_object_array_add(jsonValuesCtl, json_object_new_string("?unknown?")); - break; - } - } - json_object_object_add(ctlRequest->valuesJ, "val", jsonValuesCtl); - - if (queryMode >= 1) { // in simple mode do not print usable values - json_object *jsonClassCtl = json_object_new_object(); - json_object_object_add(jsonClassCtl, "type", json_object_new_int(elemType)); - json_object_object_add(jsonClassCtl, "count", json_object_new_int(count)); - - switch (elemType) { - case SND_CTL_ELEM_TYPE_INTEGER: - json_object_object_add(jsonClassCtl, "min", json_object_new_int((int) snd_ctl_elem_info_get_min(elemInfo))); - json_object_object_add(jsonClassCtl, "max", json_object_new_int((int) snd_ctl_elem_info_get_max(elemInfo))); - json_object_object_add(jsonClassCtl, "step", json_object_new_int((int) snd_ctl_elem_info_get_step(elemInfo))); - break; - case SND_CTL_ELEM_TYPE_INTEGER64: - json_object_object_add(jsonClassCtl, "min", json_object_new_int64(snd_ctl_elem_info_get_min64(elemInfo))); - json_object_object_add(jsonClassCtl, "max", json_object_new_int64(snd_ctl_elem_info_get_max64(elemInfo))); - json_object_object_add(jsonClassCtl, "step", json_object_new_int64(snd_ctl_elem_info_get_step64(elemInfo))); - break; - case SND_CTL_ELEM_TYPE_ENUMERATED: - { - unsigned int item, items = snd_ctl_elem_info_get_items(elemInfo); - json_object *jsonEnum = json_object_new_array(); - - for (item = 0; item < items; item++) { - snd_ctl_elem_info_set_item(elemInfo, item); - if ((err = snd_ctl_elem_info(ctlDev, elemInfo)) >= 0) { - json_object_array_add(jsonEnum, json_object_new_string(snd_ctl_elem_info_get_item_name(elemInfo))); - } - } - json_object_object_add(jsonClassCtl, "enums", jsonEnum); - break; - } - default: break; // ignore any unknown type - } - - // add collected class info with associated ACLs - json_object_object_add(ctlRequest->valuesJ, "ctl", jsonClassCtl); - - if (queryMode >= QUERY_FULL) json_object_object_add(ctlRequest->valuesJ, "acl", getControlAcl(elemInfo)); - - // check for tlv [direct port from amixer.c] - if (snd_ctl_elem_info_is_tlv_readable(elemInfo)) { - unsigned int *tlv = alloca(TLV_BYTE_SIZE); - if ((err = snd_ctl_elem_tlv_read(ctlDev, elemId, tlv, 4096)) < 0) { - AFB_NOTICE("Control numid=%d err=%s element TLV read error\n", numid, snd_strerror(err)); - goto OnErrorExit; - } else { - json_object_object_add(ctlRequest->valuesJ, "tlv", decodeTlv(tlv, TLV_BYTE_SIZE, queryMode)); - } - } - } - - ctlRequest->used = 1; - return 0; - -OnErrorExit: - ctlRequest->used = -1; - return -1; -} - -// assign multiple control to the same value - -STATIC void alsaSetGetCtls(ActionSetGetT action, afb_req request) { - ctlRequestT *ctlRequest; - const char *warmsg = NULL; - int err = 0, status = 0, done; - unsigned int ctlCount; - snd_ctl_t *ctlDev; - snd_ctl_elem_list_t *ctlList; - queryValuesT queryValues; - json_object *queryJ, *numidsJ, *sndctls; - - queryJ = alsaCheckQuery(request, &queryValues); - if (!queryJ) goto OnErrorExit; - - // Prase Numids + optional values - done = json_object_object_get_ex(queryJ, "ctl", &numidsJ); - if (!done) queryValues.count = 0; - else { - enum json_type jtype = json_object_get_type(numidsJ); - switch (jtype) { - case json_type_array: - queryValues.numidsJ = numidsJ; - queryValues.count = json_object_array_length(numidsJ); - break; - - case json_type_int: - case json_type_object: - queryValues.count = 1; - queryValues.numidsJ = numidsJ; - break; - - default: - afb_req_fail_f(request, "numid-notarray", "NumId=%s NumId not valid JSON array", json_object_get_string(numidsJ)); - goto OnErrorExit; - } - } - - if ((err = snd_ctl_open(&ctlDev, queryValues.devid, 0)) < 0) { - afb_req_fail_f(request, "sndcrl-notfound", "devid='%s' load fail error=%s\n", queryValues.devid, snd_strerror(err)); - goto OnErrorExit; - } - - snd_ctl_elem_list_alloca(&ctlList); - if ((err = snd_ctl_elem_list(ctlDev, ctlList)) < 0) { - afb_req_fail_f(request, "listInit-failed", "devid='%s' load fail error=%s\n", queryValues.devid, snd_strerror(err)); - goto OnErrorExit; - } - - if ((err = snd_ctl_elem_list_alloc_space(ctlList, snd_ctl_elem_list_get_count(ctlList))) < 0) { - afb_req_fail_f(request, "listAlloc-failed", "devid='%s' load fail error=%s\n", queryValues.devid, snd_strerror(err)); - goto OnErrorExit; - } - - if ((err = snd_ctl_elem_list(ctlDev, ctlList)) < 0) { - afb_req_fail_f(request, "listOpen-failed", "devid='%s' load fail error=%s\n", queryValues.devid, snd_strerror(err)); - goto OnErrorExit; - } - - // Parse numids string (empty == all) - ctlCount = snd_ctl_elem_list_get_used(ctlList); - if (queryValues.count == 0) { - ctlRequest = alloca(sizeof (ctlRequestT)*(ctlCount)); - } else { - ctlRequest = alloca(sizeof (ctlRequestT)*(queryValues.count)); - NumidsListParse(action, &queryValues, ctlRequest); - } - - // if more than one crl requested prepare an array for response - if (queryValues.count != 1 && action == ACTION_GET) sndctls = json_object_new_array(); - else sndctls = NULL; - - // Loop on all ctlDev controls - for (int ctlIndex = 0; ctlIndex < ctlCount; ctlIndex++) { - unsigned int selected = 0; - int jdx; - - if (queryValues.count == 0 && action == ACTION_GET) { - selected = 1; // check is this numid is selected within query - jdx = ctlIndex; // map all existing ctl as requested - } else { - int numid = snd_ctl_elem_list_get_numid(ctlList, ctlIndex); - if (numid < 0) { - AFB_NOTICE("snd_ctl_elem_list_get_numid index=%d fail", ctlIndex); - continue; - } - // check if current control was requested in query numids list - for (jdx = 0; jdx < queryValues.count; jdx++) { - if (numid == ctlRequest[jdx].numId) { - selected = 1; - break; - } - } - } - - // control is selected open ctlid and get value - if (selected) { - snd_ctl_elem_id_t *elemId; - snd_ctl_elem_id_alloca(&elemId); - - snd_ctl_elem_list_get_id(ctlList, ctlIndex, elemId); - switch (action) { - case ACTION_GET: - err = alsaGetSingleCtl(ctlDev, elemId, &ctlRequest[jdx], queryValues.mode); - break; - - case ACTION_SET: - err = alsaSetSingleCtl(ctlDev, elemId, &ctlRequest[jdx]); - break; - - default: - err = 1; - } - if (err) status++; - else { - // Do not embed response in an array when only one ctl was requested - if (action == ACTION_GET) { - if (queryValues.count == 1) sndctls = ctlRequest[jdx].valuesJ; - else json_object_array_add(sndctls, ctlRequest[jdx].valuesJ); - } - } - } - } - - // if we had error let's add them into response message info - json_object *warningsJ = json_object_new_array(); - for (int jdx = 0; jdx < queryValues.count; jdx++) { - if (ctlRequest[jdx].used <= 0) { - json_object *failctl = json_object_new_object(); - if (ctlRequest[jdx].numId == -1) json_object_object_add(failctl, "warning", json_object_new_string("Numid Invalid")); - else { - if (ctlRequest[jdx].used == 0) json_object_object_add(failctl, "warning", json_object_new_string("Numid Does Not Exist")); - if (ctlRequest[jdx].used == -1) json_object_object_add(failctl, "warning", json_object_new_string("Value Refused")); - } - - json_object_object_add(failctl, "ctl", ctlRequest[jdx].jToken); - - json_object_array_add(warningsJ, failctl); - } - /* WARNING!!!! Check with Jose why following put free valuesJ - if (ctlRequest[jdx].jToken) json_object_put(ctlRequest[jdx].jToken); - if (ctlRequest[jdx].valuesJ) json_object_put(ctlRequest[jdx].valuesJ); - */ - } - - if (json_object_array_length(warningsJ) > 0) warmsg = json_object_get_string(warningsJ); - else json_object_put(warningsJ); - - // send response+warning if any - afb_req_success(request, sndctls, warmsg); - snd_ctl_elem_list_clear(ctlList); - -OnErrorExit: - return; -} - -PUBLIC void alsaGetCtls(afb_req request) { - alsaSetGetCtls(ACTION_GET, request); -} - -PUBLIC void alsaSetCtls(afb_req request) { - alsaSetGetCtls(ACTION_SET, request); -} - - |