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-rw-r--r--AlsaSound/CoreBinding/AlsaCtlSetGet.c1084
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;
-}
-