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authorFulup Ar Foll <fulup@iot.bzh>2017-10-24 22:12:48 +0200
committerFulup Ar Foll <fulup@iot.bzh>2017-10-24 22:12:48 +0200
commit6561612a64a52d93260444066a266adb06ac71ad (patch)
tree310cc6cd3fd65e5ed6d02f7743ae2def4ac80644 /Alsa-afb/Alsa-SetGet.c
parent2fd0fa8c77dbaaf40ba0812e43b6637ff1d1d76e (diff)
Initial working version as independent repo
Diffstat (limited to 'Alsa-afb/Alsa-SetGet.c')
-rw-r--r--Alsa-afb/Alsa-SetGet.c815
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);
-}
-
-