diff options
Diffstat (limited to 'AlsaSound/CoreBinding/AlsaCtlSetGet.c')
| -rw-r--r-- | AlsaSound/CoreBinding/AlsaCtlSetGet.c | 1084 |
1 files changed, 0 insertions, 1084 deletions
diff --git a/AlsaSound/CoreBinding/AlsaCtlSetGet.c b/AlsaSound/CoreBinding/AlsaCtlSetGet.c deleted file mode 100644 index a41e390..0000000 --- a/AlsaSound/CoreBinding/AlsaCtlSetGet.c +++ /dev/null @@ -1,1084 +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) - -*/ - -#define _GNU_SOURCE // needed for vasprintf - -#include <alsa/asoundlib.h> -#include "AlsaCoreBinding.h" -#include <systemd/sd-event.h> - - - -// use to store crl numid user request -typedef struct { - unsigned int numId; - json_object *jToken; - json_object *jValues; - int used; -} ctlRequestT; - -// generic sndctrl event handle hook to event callback when pooling -typedef struct { - struct pollfd pfds; - sd_event_source *src; - snd_ctl_t *ctlDev; - int quiet; - struct afb_event afbevt; -} evtHandleT; - -typedef struct { - int ucount; - int cardId; - evtHandleT *evtHandle; -} sndHandleT; - -typedef struct { - char *apiprefix; - char *shortname; -}cardRegistryT; - -cardRegistryT *cardRegistry[MAX_SND_CARD+1]; - -PUBLIC void NumidsListParse (queryValuesT *queryValues, ctlRequestT *ctlRequest) { - json_object *jValues; - int length; - - for (int idx=0; idx < queryValues->count; idx ++) { - ctlRequest[idx].jToken = json_object_array_get_idx (queryValues->jNumIds, idx); - ctlRequest[idx].jValues = NULL; - ctlRequest[idx].used=0; - - enum json_type jtype=json_object_get_type(ctlRequest[idx].jToken); - switch (jtype) { - json_object *jId, *jVal; - - 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); - 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); - if (length < 1 || length >2) { - ctlRequest[idx].used=-1; - continue; - } - - ctlRequest[idx].numId =json_object_get_int(json_object_array_get_idx (ctlRequest[idx].jToken, 0)); - - if (length == 2) { - jValues = json_object_array_get_idx (ctlRequest[idx].jToken, 1); - if (jValues == NULL) { - ctlRequest[idx].used=-1; - continue; - } - // Value is an int or an array with potentially multiple subvalues - ctlRequest[idx].jValues = jValues; - } - 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) || !json_object_object_get_ex (ctlRequest[idx].jToken,"val",&jVal)) { - NOTICE (afbIface,"Invalid Json=%s missing 'id'|'val'", json_object_get_string(ctlRequest[idx].jToken)); - ctlRequest[idx].used=-1; - } else { - ctlRequest[idx].numId =json_object_get_int(jId); - ctlRequest[idx].jValues =jVal; - } - - - default: - ctlRequest[idx].used=-1; - } - } -} - -PUBLIC int alsaCheckQuery (struct afb_req request, queryValuesT *queryValues) { - - queryValues->devid = afb_req_value(request, "devid"); - if (queryValues->devid == NULL) goto OnErrorExit; - const char *numids; - json_object *jNumIds; - - const char *rqtQuiet = afb_req_value(request, "quiet"); - if (!rqtQuiet) queryValues->quiet=99; // default super quiet - else if (rqtQuiet && ! sscanf (rqtQuiet, "%d", &queryValues->quiet)) { - json_object *query = afb_req_json(request); - - afb_req_fail_f (request, "quiet-notinteger","Query=%s Quiet not integer &quiet=%s&", json_object_to_json_string(query), rqtQuiet); - goto OnErrorExit; - }; - - // no NumId is interpreted as ALL for get and error for set - numids = afb_req_value(request, "numids"); - if (numids == NULL) { - queryValues->count=0; - goto OnExit; - } - - jNumIds = json_tokener_parse(numids); - if (!jNumIds) { - afb_req_fail_f (request, "numids-notjson","numids=%s not a valid json entry", numids); - goto OnErrorExit; - }; - - enum json_type jtype= json_object_get_type(jNumIds); - switch (jtype) { - case json_type_array: - queryValues->jNumIds = jNumIds; - queryValues->count = json_object_array_length (jNumIds); - break; - - case json_type_int: - queryValues->count = 1; - queryValues->jNumIds = json_object_new_array (); - json_object_array_add (queryValues->jNumIds, jNumIds); - break; - - default: - afb_req_fail_f (request, "numid-notarray","NumId=%s NumId not valid JSON array", numids); - goto OnErrorExit; - } - -OnExit: - return 0; - -OnErrorExit: - return 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) { - 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); - 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) { - snprintf(label, sizeof (label), "0x%08x,", tlv[idx++]); - json_object_array_add(arrayJson, json_object_new_string(label)); - size -= (unsigned int) sizeof (unsigned int); - } - json_object_object_add(dbscaleJson, "array", arrayJson); - } else { - 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)); - } - 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) { - snprintf(label, sizeof (label), "0x%08x,", tlv[idx++]); - json_object_array_add(arrayJson, json_object_new_string(label)); - size -= (unsigned int) sizeof (unsigned int); - } - json_object_object_add(dbLinearJson, "offset", arrayJson); - } else { - json_object_object_add(dbLinearJson, "min", DB2StringJsonOject((int) tlv[2])); - json_object_object_add(dbLinearJson, "max", DB2StringJsonOject((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) { - snprintf(label, sizeof (label), "0x%08x,", tlv[idx++]); - json_object_array_add(arrayJson, json_object_new_string(label)); - size -= (unsigned int) sizeof (unsigned int); - } - json_object_object_add(dbRangeJson, "dbrange", arrayJson); - break; - } - while (size > 0) { - json_object * embedJson = json_object_new_object(); - snprintf(label, sizeof (label), "%i,", tlv[idx++]); - json_object_object_add(embedJson, "rangemin", json_object_new_string(label)); - snprintf(label, sizeof (label), "%i", tlv[idx++]); - json_object_object_add(embedJson, "rangemax", json_object_new_string(label)); - embedJson = decodeTlv(tlv + idx, 4 * sizeof (unsigned int)); - 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) { - snprintf(label, sizeof (label), "0x%08x,", tlv[idx++]); - json_object_array_add(arrayJson, json_object_new_string(label)); - size -= (unsigned int) sizeof (unsigned int); - } - json_object_object_add(dbMinMaxJson, "array", arrayJson); - - } else { - json_object_object_add(dbMinMaxJson, "min", DB2StringJsonOject((int) tlv[2])); - json_object_object_add(dbMinMaxJson, "max", DB2StringJsonOject((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) { - INFO (afbIface, "SndCard [%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); - WARNING (afbIface, "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 (afbIface->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)); - INFO (afbIface, "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 (struct 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 -STATIC 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; - - // 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) { - NOTICE (afbIface, "Fail to load ALSA NUMID=%d Values=[%s]", ctlRequest->numId, json_object_to_json_string(ctlRequest->jValues)); - goto OnErrorExit; - } - - snd_ctl_elem_info_get_id(elemInfo, elemId); // map ctlInfo to ctlId elemInfo is updated !!! - if (!snd_ctl_elem_info_is_writable(elemInfo)) { - NOTICE (afbIface, "Not Writable ALSA NUMID=%d Values=[%s]", ctlRequest->numId, json_object_to_json_string(ctlRequest->jValues)); - goto OnErrorExit; - } - - count = snd_ctl_elem_info_get_count (elemInfo); - if (count == 0) goto OnErrorExit; - - enum json_type jtype= json_object_get_type(ctlRequest->jValues); - switch (jtype) { - case json_type_array: - length = json_object_array_length (ctlRequest->jValues); - valueIsArray=1; - break; - case json_type_int: - length=1; - valueIsArray=0; - break; - default: - count =0; - break; - } - - - if (count == 0 || count < length) { - NOTICE (afbIface, "Invalid values NUMID='%d' Values='%s' count='%d' wanted='%d'", ctlRequest->numId, json_object_to_json_string(ctlRequest->jValues), 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 < length; index++) { - json_object *element; - int value; - - if (valueIsArray) element= json_object_array_get_idx(ctlRequest->jValues, index); - else element= ctlRequest->jValues; - - 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) { - NOTICE (afbIface, "Fail to write ALSA NUMID=%d Values=[%s] Error=%s", ctlRequest->numId, json_object_to_json_string(ctlRequest->jValues), snd_strerror(err)); - goto OnErrorExit; - } - - ctlRequest->used=1; - return 0; - - OnErrorExit: - ctlRequest->used=-1; - return -1; -} - -// process ALSA control and store then into ctlRequest -STATIC int alsaGetSingleCtl (snd_ctl_t *ctlDev, snd_ctl_elem_id_t *elemId, ctlRequestT *ctlRequest, int quiet) { - 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); // map ctlInfo to ctlId elemInfo is updated !!! - if (snd_ctl_elem_info(ctlDev, elemInfo) < 0) goto OnErrorExit; - count = snd_ctl_elem_info_get_count (elemInfo); - if (count == 0) goto OnErrorExit; - - snd_ctl_elem_info_get_id(elemInfo, elemId); // map ctlInfo to ctlId elemInfo is updated !!! - 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); // map ctlInfo to ctlId elemInfo is updated !!! - if (snd_ctl_elem_read(ctlDev, elemData) < 0) goto OnErrorExit; - - int numid= snd_ctl_elem_info_get_numid(elemInfo); - - ctlRequest->jValues= json_object_new_object(); - json_object_object_add (ctlRequest->jValues,"id" , json_object_new_int(numid)); - if (quiet < 2) json_object_object_add (ctlRequest->jValues,"name" , json_object_new_string(snd_ctl_elem_id_get_name (elemId))); - if (quiet < 1) json_object_object_add (ctlRequest->jValues,"iface" , json_object_new_string(snd_ctl_elem_iface_name(snd_ctl_elem_id_get_interface(elemId)))); - if (quiet < 3) json_object_object_add (ctlRequest->jValues,"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->jValues,"val",jsonValuesCtl); - - if (!quiet) { // in simple mode do not print usable values - json_object *jsonClassCtl = json_object_new_object(); - json_object_object_add (jsonClassCtl,"type" , json_object_new_string(snd_ctl_elem_type_name(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->jValues,"ctrl", jsonClassCtl); - json_object_object_add (ctlRequest->jValues,"acl" , getControlAcl (elemInfo)); - - // check for tlv [direct port from amixer.c] - if (snd_ctl_elem_info_is_tlv_readable(elemInfo)) { - unsigned int *tlv; - tlv = malloc(4096); - if ((err = snd_ctl_elem_info(ctlDev, elemInfo)) < 0) { - fprintf (stderr, "Control %s element TLV read error\n", snd_strerror(err)); - free(tlv); - } else { - json_object_object_add (ctlRequest->jValues,"tlv", decodeTlv (tlv, 4096)); - } - } - } - ctlRequest->used=1; - return 0; - - OnErrorExit: - ctlRequest->used=-1; - return -1; -} - -// assign multiple control to the same value -PUBLIC void alsaSetGetCtls (struct afb_req request, ActionSetGetT action) { - ctlRequestT *ctlRequest; - const char *warmsg=NULL; - int err=0, status=0; - unsigned int ctlCount; - snd_ctl_t *ctlDev; - snd_ctl_elem_list_t *ctlList; - json_object *sndctls=json_object_new_array();; - queryValuesT queryValues; - - err = alsaCheckQuery (request, &queryValues); - if (err) 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 (&queryValues, ctlRequest); - } - - // 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) { - NOTICE (afbIface,"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.quiet); - break; - - case ACTION_SET: - err = alsaSetSingleCtl (ctlDev, elemId, &ctlRequest[jdx]); - - default: - err = 1; - } - if (err) status++; - else { - json_object_array_add (sndctls, ctlRequest[jdx].jValues); - } - } - } - - // if we had error let's add them into response message info - json_object *warnings = json_object_new_array(); - for (int jdx=0; jdx < queryValues.count; jdx++) { - if (ctlRequest[jdx].used <= 0) { - json_object *failctl = json_object_new_object(); - json_object_object_add (failctl, "numid", ctlRequest[jdx].jToken); - if (ctlRequest[jdx].jValues) - json_object_object_add(failctl, "values", ctlRequest[jdx].jValues); - - if (ctlRequest[jdx].numId == -1) json_object_object_add (failctl, "info", json_object_new_string ("Invalid NumID")); - else { - if (ctlRequest[jdx].used == 0) json_object_object_add (failctl, "info", json_object_new_string ("Does Not Exist")); - if (ctlRequest[jdx].used == -1) json_object_object_add (failctl, "info", json_object_new_string ("Invalid Value")); - } - json_object_array_add (warnings, failctl); - } - /* WARNING!!!! Check with Jose why following put free jValues - if (ctlRequest[jdx].jToken) json_object_put(ctlRequest[jdx].jToken); - if (ctlRequest[jdx].jValues) json_object_put(ctlRequest[jdx].jValues); - */ - } - - if (json_object_array_length(warnings)) warmsg=json_object_to_json_string_ext(warnings, JSON_C_TO_STRING_PLAIN); - else json_object_put(warnings); - - // send response+warning if any - afb_req_success (request, sndctls, warmsg); - snd_ctl_elem_list_clear(ctlList); - - OnErrorExit: - return; -} - -PUBLIC void alsaGetCtls (struct afb_req request) { - alsaSetGetCtls (request, ACTION_GET); -} - -PUBLIC void alsaSetCtls (struct afb_req request) { - alsaSetGetCtls (request, ACTION_SET); -} - - -// This routine is called when ALSA event are fired -STATIC int sndCtlEventCB (sd_event_source* src, int fd, uint32_t revents, void* userData) { - int err; - evtHandleT *evtHandle = (evtHandleT*)userData; - snd_ctl_event_t *eventId; - json_object *ctlEventJ; - unsigned int mask; - int iface; - int device; - int subdev; - const char*devname; - ctlRequestT ctlRequest; - snd_ctl_elem_id_t *elemId; - - if ((revents & EPOLLHUP) != 0) { - NOTICE (afbIface, "SndCtl hanghup [car disconnected]"); - goto ExitOnSucess; - } - - if ((revents & EPOLLIN) != 0) { - - // initialise event structure on stack - snd_ctl_event_alloca(&eventId); - snd_ctl_elem_id_alloca(&elemId); - - err = snd_ctl_read(evtHandle->ctlDev, eventId); - if (err < 0) goto OnErrorExit; - - // we only process sndctrl element - if (snd_ctl_event_get_type(eventId) != SND_CTL_EVENT_ELEM) goto ExitOnSucess; - - // we only process value changed events - mask = snd_ctl_event_elem_get_mask(eventId); - if (!(mask & SND_CTL_EVENT_MASK_VALUE)) goto ExitOnSucess; - - snd_ctl_event_elem_get_id (eventId, elemId); - - err = alsaGetSingleCtl (evtHandle->ctlDev, elemId, &ctlRequest, evtHandle->quiet); - if (err) goto OnErrorExit; - - iface = snd_ctl_event_elem_get_interface(eventId); - device = snd_ctl_event_elem_get_device(eventId); - subdev = snd_ctl_event_elem_get_subdevice(eventId); - devname= snd_ctl_event_elem_get_name(eventId); - - // proxy ctlevent as a binder event - ctlEventJ = json_object_new_object(); - json_object_object_add(ctlEventJ, "device" ,json_object_new_int (device)); - json_object_object_add(ctlEventJ, "subdev" ,json_object_new_int (subdev)); - if (evtHandle->quiet < 2) { - json_object_object_add(ctlEventJ, "iface" ,json_object_new_int (iface)); - json_object_object_add(ctlEventJ, "devname",json_object_new_string (devname)); - } - if (ctlRequest.jValues) (json_object_object_add(ctlEventJ, "values" ,ctlRequest.jValues)); - DEBUG(afbIface, "sndCtlEventCB=%s", json_object_get_string(ctlEventJ)); - afb_event_push(evtHandle->afbevt, ctlEventJ); - - } - - ExitOnSucess: - return 0; - - OnErrorExit: - WARNING (afbIface, "sndCtlEventCB: ignored unsupported event type"); - return (0); -} - -// Subscribe to every Alsa CtlEvent send by a given board -PUBLIC void alsaSubcribe (struct afb_req request) { - static sndHandleT sndHandles[MAX_SND_CARD]; - evtHandleT *evtHandle; - snd_ctl_t *ctlDev; - int err, idx, cardId, idxFree=-1; - snd_ctl_card_info_t *cardinfo; - queryValuesT queryValues; - - - err = alsaCheckQuery (request, &queryValues); - if (err) goto OnErrorExit; - - - // open control interface for devid - err = snd_ctl_open(&ctlDev, queryValues.devid, SND_CTL_READONLY); - if (err < 0) { - ctlDev=NULL; - afb_req_fail_f (request, "devid-unknown", "SndCard devid=%s Not Found err=%s", queryValues.devid, snd_strerror(err)); - goto OnErrorExit; - } - - snd_ctl_card_info_alloca(&cardinfo); - if ((err = snd_ctl_card_info(ctlDev, cardinfo)) < 0) { - afb_req_fail_f (request, "devid-invalid", "SndCard devid=%s Not Found err=%s", queryValues.devid, snd_strerror(err)); - goto OnErrorExit; - } - - cardId=snd_ctl_card_info_get_card(cardinfo); - - // search for an existing subscription and mark 1st free slot - for (idx= 0; idx < MAX_SND_CARD; idx ++) { - if (sndHandles[idx].ucount > 0 && cardId == sndHandles[idx].cardId) { - evtHandle= sndHandles[idx].evtHandle; - break; - } else if (idxFree == -1) idxFree= idx; - }; - - // if not subscription exist for the event let's create one - if (idx == MAX_SND_CARD) { - - // reach MAX_SND_CARD event registration - if (idxFree == -1) { - afb_req_fail_f (request, "register-toomany", "Cannot register new event Maxcard==%devent name=%s", idx); - goto OnErrorExit; - } - - evtHandle = malloc (sizeof(evtHandleT)); - evtHandle->ctlDev = ctlDev; - evtHandle->quiet = queryValues.quiet; - sndHandles[idxFree].ucount = 0; - sndHandles[idxFree].cardId = cardId; - sndHandles[idxFree].evtHandle = evtHandle; - - // subscribe for sndctl events attached to devid - err = snd_ctl_subscribe_events(evtHandle->ctlDev, 1); - if (err < 0) { - afb_req_fail_f (request, "subscribe-fail", "Cannot subscribe events from devid=%s err=%d", queryValues.devid, err); - goto OnErrorExit; - } - - // get pollfd attach to this sound board - snd_ctl_poll_descriptors(evtHandle->ctlDev, &evtHandle->pfds, 1); - - // register sound event to binder main loop - err = sd_event_add_io(afb_daemon_get_event_loop(afbIface->daemon), &evtHandle->src, evtHandle->pfds.fd, EPOLLIN, sndCtlEventCB, evtHandle); - if (err < 0) { - afb_req_fail_f (request, "register-mainloop", "Cannot hook events to mainloop devid=%s err=%d", queryValues.devid, err); - goto OnErrorExit; - } - - // create binder event attached to devid name - evtHandle->afbevt = afb_daemon_make_event (afbIface->daemon, queryValues.devid); - if (!afb_event_is_valid (evtHandle->afbevt)) { - afb_req_fail_f (request, "register-event", "Cannot register new binder event name=%s", queryValues.devid); - goto OnErrorExit; - } - - // everything looks OK let's move forward - idx=idxFree; - } - - // subscribe to binder event - err = afb_req_subscribe(request, evtHandle->afbevt); - if (err != 0) { - afb_req_fail_f (request, "register-eventname", "Cannot subscribe binder event name=%s [invalid channel]", queryValues.devid, err); - goto OnErrorExit; - } - - // increase usage count and return success - sndHandles[idx].ucount ++; - afb_req_success(request, NULL, NULL); - return; - - OnErrorExit: - if (ctlDev) snd_ctl_close(ctlDev); - return; -} - -// Subscribe to every Alsa CtlEvent send by a given board -PUBLIC void alsaGetCardId (struct afb_req request) { - char devid [10]; - const char *devname, *shortname, *longname; - int card, err, index, idx; - json_object *respJson; - snd_ctl_t *ctlDev; - snd_ctl_card_info_t *cardinfo; - - const char *sndname = afb_req_value(request, "sndname"); - if (sndname == NULL) { - afb_req_fail_f (request, "argument-missing", "sndname=SndCardName missing"); - goto OnErrorExit; - } - - // loop on potential card number - snd_ctl_card_info_alloca(&cardinfo); - for (card =0; card < MAX_SND_CARD; card++) { - - // build card devid and probe it - snprintf (devid, sizeof(devid), "hw:%i", card); - - // open control interface for devid - err = snd_ctl_open(&ctlDev, devid, SND_CTL_READONLY); - if (err < 0) continue; - - // extract sound card information - snd_ctl_card_info(ctlDev, cardinfo); - index = snd_ctl_card_info_get_card(cardinfo); - devname = snd_ctl_card_info_get_id(cardinfo); - shortname= snd_ctl_card_info_get_name(cardinfo); - longname = snd_ctl_card_info_get_longname(cardinfo); - - // check if short|long name match - if (!strcmp (sndname, devname)) break; - if (!strcmp (sndname, shortname)) break; - if (!strcmp (sndname, longname)) break; - } - - if (card == MAX_SND_CARD) { - afb_req_fail_f (request, "ctlDev-notfound", "Fail to find card with name=%s", sndname); - goto OnErrorExit; - } - - // proxy ctlevent as a binder event - respJson = json_object_new_object(); - json_object_object_add(respJson, "index" ,json_object_new_int (index)); - json_object_object_add(respJson, "devid" ,json_object_new_string (devid)); - json_object_object_add(respJson, "shortname" ,json_object_new_string (shortname)); - json_object_object_add(respJson, "longname" ,json_object_new_string (longname)); - - // search for a HAL binder card mapping name to api prefix - for (idx=0; idx < MAX_SND_CARD; idx++) { - if (!strcmp (cardRegistry[idx]->shortname, shortname)) break; - } - // if a match if found, then we have an HAL for this board let's return its value - if (idx < MAX_SND_CARD) json_object_object_add(respJson, "halapi",json_object_new_string (cardRegistry[idx]->apiprefix)); - - afb_req_success(request, respJson, NULL); - return; - - OnErrorExit: - return; -} - -// Register loaded HAL with board Name and API prefix -PUBLIC void alsaRegisterHal (struct afb_req request) { - static int index=0; - const char *shortname, *apiPrefix; - - apiPrefix = afb_req_value(request, "prefix"); - if (apiPrefix == NULL) { - afb_req_fail_f (request, "argument-missing", "prefix=BindingApiPrefix missing"); - goto OnErrorExit; - } - - shortname = afb_req_value(request, "name"); - if (shortname == NULL) { - afb_req_fail_f (request, "argument-missing", "sndname=SndCardName missing"); - goto OnErrorExit; - } - - if (index == MAX_SND_CARD) { - afb_req_fail_f (request, "alsahal-toomany", "Fail to register sndname=[%s]", shortname); - goto OnErrorExit; - } - - cardRegistry[index]= malloc (sizeof(cardRegistry)); - cardRegistry[index]->apiprefix=strdup(apiPrefix); - cardRegistry[index]->shortname=strdup(shortname); - index++;cardRegistry[index]=NULL; - - // when OK nothing to return - afb_req_success(request, NULL, NULL); - return; - - OnErrorExit: - return; -} - |