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Diffstat (limited to 'ALSA-afb/AlsaUseCase.c')
| -rw-r--r-- | ALSA-afb/AlsaUseCase.c | 433 |
1 files changed, 0 insertions, 433 deletions
diff --git a/ALSA-afb/AlsaUseCase.c b/ALSA-afb/AlsaUseCase.c deleted file mode 100644 index 8e23e3c..0000000 --- a/ALSA-afb/AlsaUseCase.c +++ /dev/null @@ -1,433 +0,0 @@ -/* - * AlsaUseCase -- 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: - http://www.alsa-project.org/alsa-doc/alsa-lib/group__ucm.html - https://www.alsa-project.org/main/index.php/DAPM - http://alsa-lib.sourcearchive.com/documentation/1.0.24.1-2/group__Use_ga4332c6bb50481bbdaf21be11551fb930.html - https://android.googlesource.com/platform/hardware/qcom/audio/+/jb-mr1-dev/libalsa-intf/alsa_ucm.h - - Sample alsaucm commands using /usr/share/alsa/ucm/PandaBoard - - alsaucm -c PandaBoard list _verbs - - alsaucm -c PandaBoard list _devices/HiFi - - alsaucm -c PandaBoard list _modifiers/HiFi #need to uncomment modifiers section - - alsaucm -c PandaBoard list TQ/HiFi - - alsaucm -c PandaBoard get TQ/HiFi/Voice - - alsaucm -c PandaBoard get PlaybackPCM//HiFi - - alsaucm -c PandaBoard set _verb HiFi - - alsaucm -c PandaBoard set _verb HiFi _enadev Headset - - alsaucm -c 'HDA Intel PCH' set _verb HiFi set _enadev Headphone set _enamod RecordMedia - - alsaucm -c 'HDA Intel PCH' set _verb HiFi get OutputDspName// - -*/ -#define _GNU_SOURCE // needed for vasprintf - -#include <alsa/asoundlib.h> -#include "AlsaCoreBinding.h" -#include <alsa/asoundlib.h> -#include <alsa/use-case.h> - -typedef struct { - snd_use_case_mgr_t *ucm; - int cardId; - char *cardName; -} ucmHandleT; - -static ucmHandleT ucmHandles[MAX_SND_CARD]; - -// Cache opened UCM handles -STATIC int alsaUseCaseOpen (struct afb_req request, queryValuesT *queryValues, int allowNewMgr) { - snd_ctl_t *ctlDev; - snd_ctl_card_info_t *cardinfo; - snd_use_case_mgr_t *ucmHandle; - const char *cardName; - int cardId, idx, idxFree=-1, err; - - // 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=%d", queryValues->devid, 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; - } - - // search for an existing subscription and mark 1st free slot - cardId = snd_ctl_card_info_get_card(cardinfo); - for (idx= 0; idx < MAX_SND_CARD; idx ++) { - if (ucmHandles[idx].ucm != NULL) { - if (ucmHandles[idx].cardId == cardId) goto OnSuccessExit; - } else if (idxFree == -1) idxFree= idx; - }; - - if (!allowNewMgr) { - afb_req_fail_f (request, "ucm-nomgr", "SndCard devid=[%s] no exiting UCM manager session", queryValues->devid); - goto OnErrorExit; - } - - if (idxFree < 0 && idx == MAX_SND_CARD) { - afb_req_fail_f (request, "ucm-toomany", "SndCard devid=[%s] too many open UCM Max=%d", queryValues->devid, MAX_SND_CARD); - goto OnErrorExit; - } - - idx = idxFree; - cardName = snd_ctl_card_info_get_name(cardinfo); - err = snd_use_case_mgr_open(&ucmHandle, cardName); - if (err) { - afb_req_fail_f (request, "ucm-open", "SndCard devid=[%s] name=[%s] No UCM Profile err=%s", queryValues->devid, cardName, snd_strerror(err)); - goto OnErrorExit; - } - ucmHandles[idx].ucm = ucmHandle; - ucmHandles[idx].cardId = cardId; - ucmHandles[idx].cardName = strdup(cardName); - - OnSuccessExit: - if (ctlDev) snd_ctl_close(ctlDev); - return idx; - - OnErrorExit: - if (ctlDev) snd_ctl_close(ctlDev); - return -1; -} - - -PUBLIC void alsaUseCaseQuery(struct afb_req request) { - int err, verbCount, ucmIdx; - const char **verbList; - snd_use_case_mgr_t *ucmHandle; - queryValuesT queryValues; - json_object *ucmJs; - const char *cardName; - - - err = alsaCheckQuery (request, &queryValues); - if (err) goto OnErrorExit; - - ucmIdx = alsaUseCaseOpen (request, &queryValues, TRUE); - if (ucmIdx < 0) goto OnErrorExit; - ucmHandle = ucmHandles [ucmIdx].ucm; - cardName = ucmHandles [ucmIdx].cardName; - - verbCount = snd_use_case_get_list (ucmHandle, "_verbs", &verbList); - if (verbCount < 0) { - afb_req_fail_f (request, "ucm-list", "SndCard devid=[%s] name=[%s] No UCM Verbs", queryValues.devid, cardName); - goto OnErrorExit; - } - - ucmJs = json_object_new_array(); - for (int idx=0; idx < verbCount; idx +=2) { - int devCount, modCount, tqCount; - const char **devList, **modList, **tqList; - json_object *ucmJ = json_object_new_object(); - char identifier[32]; - - json_object_object_add (ucmJ, "verb", json_object_new_string(verbList[idx])); - if (verbList[idx+1]) json_object_object_add (ucmJ, "info", json_object_new_string(verbList[idx+1])); - - DEBUG (afbIface, "Verb[%d] Action=%s Info=%s", idx, verbList[idx], verbList[idx+1]); - - snprintf (identifier, sizeof(identifier), "_devices/%s", verbList[idx]); - devCount = snd_use_case_get_list (ucmHandle, identifier, &devList); - if (devCount > 0) { - json_object *devsJ = json_object_new_array(); - - for (int jdx=0; jdx < devCount; jdx+=2) { - json_object *devJ = json_object_new_object(); - DEBUG (afbIface, "device[%d] Action=%s Info=%s", jdx, devList[jdx], devList[jdx+1]); - json_object_object_add (devJ, "dev", json_object_new_string(devList[jdx])); - if (devList[jdx+1]) json_object_object_add (devJ, "info", json_object_new_string(devList[jdx+1])); - json_object_array_add (devsJ, devJ); - } - json_object_object_add(ucmJ,"devices", devsJ); - snd_use_case_free_list(devList, err); - } - - snprintf (identifier, sizeof(identifier), "_modifiers/%s", verbList[idx]); - modCount = snd_use_case_get_list (ucmHandle, identifier, &modList); - if (modCount > 0) { - json_object *modsJ = json_object_new_array(); - - for (int jdx=0; jdx < modCount; jdx+=2) { - json_object *modJ = json_object_new_object(); - DEBUG (afbIface, "modifier[%d] Action=%s Info=%s", jdx, modList[jdx], modList[jdx+1]); - json_object_object_add (modJ, "mod", json_object_new_string(modList[jdx])); - if (modList[jdx+1]) json_object_object_add (modJ, "info", json_object_new_string(modList[jdx+1])); - json_object_array_add (modsJ, modJ); - } - json_object_object_add(ucmJ,"modifiers", modsJ); - snd_use_case_free_list(modList, err); - } - - snprintf (identifier, sizeof(identifier), "TQ/%s", verbList[idx]); - tqCount = snd_use_case_get_list (ucmHandle, identifier, &tqList); - if (tqCount > 0) { - json_object *tqsJ = json_object_new_array(); - - for (int jdx=0; jdx < tqCount; jdx+=2) { - json_object *tqJ = json_object_new_object(); - DEBUG (afbIface, "toneqa[%d] Action=%s Info=%s", jdx, tqList[jdx], tqList[jdx+1]); - json_object_object_add (tqJ, "tq", json_object_new_string(tqList[jdx])); - if (tqList[jdx+1]) json_object_object_add (tqJ, "info", json_object_new_string(tqList[jdx+1])); - json_object_array_add (tqsJ, tqJ); - } - json_object_object_add(ucmJ,"tqs", tqsJ); - snd_use_case_free_list(tqList, err); - } - - json_object_array_add (ucmJs, ucmJ); - } - - afb_req_success (request, ucmJs, NULL); - snd_use_case_free_list(verbList, err); - - OnErrorExit: - return; -} - -STATIC json_object *ucmGetValue (ucmHandleT *ucmHandle, const char *verb, const char *mod, const char *label) { - char identifier[80]; - char *value; - int err; - json_object *jValue; - - // handle optional parameters - if (!mod) mod=""; - if (!verb) verb=""; - - if (!label) { - NOTICE (afbIface, "ucmGetValue cardname=[%s] value label missing", ucmHandle->cardName); - goto OnErrorExit; - } - - snprintf (identifier, sizeof(identifier), "%s/%s/%s", label, mod, verb); - err = snd_use_case_get (ucmHandle->ucm, identifier, (const char**)&value); // Note: value casting is a known "FEATURE" of AlsaUCM API - if (err) { - DEBUG (afbIface, "ucmGetValue cardname=[%s] identifier=[%s] error=%s", ucmHandle->cardName, identifier, snd_strerror (err)); - goto OnErrorExit; - } - - // copy value into json object and free string - jValue = json_object_new_string (value); - free (value); - return (jValue); - - OnErrorExit: - return (NULL); -} - -PUBLIC void alsaUseCaseGet (struct afb_req request) { - int err, ucmIdx, labelCount; - queryValuesT queryValues; - json_object *jResponse = json_object_new_object(); - json_object *jWarnings = json_object_new_array(); - const char *warnings=NULL; - - err = alsaCheckQuery (request, &queryValues); - if (err) goto OnErrorExit; - - ucmIdx = alsaUseCaseOpen (request, &queryValues, TRUE); - if (ucmIdx < 0) goto OnErrorExit; - - const char *cardName= ucmHandles[ucmIdx].cardName; - - const char *verb = afb_req_value(request, "verb"); - const char *mod = afb_req_value(request, "mod"); - const char *dev = afb_req_value(request, "dev"); - - if (dev && mod) { - afb_req_fail_f (request, "ucmget-labels", "SndCard devid=[%s] name=[%s] UCM mod+dev incompatible", queryValues.devid, cardName); - goto OnErrorExit; - } - - // device selection is handle as a modifier - if (dev) mod=dev; - - const char *labels = afb_req_value(request, "values"); - if (!labels) { - afb_req_fail_f (request, "ucmget-labels", "SndCard devid=[%s] name=[%s] UCM values name missing", queryValues.devid, cardName); - goto OnErrorExit; - } - - json_object *jLabels = json_tokener_parse(labels); - if (!jLabels) { - afb_req_fail_f (request, "ucmget-notjson","labels=%s not a valid json entry", labels); - goto OnErrorExit; - }; - - enum json_type jtype= json_object_get_type(jLabels); - switch (jtype) { - json_object *jTmp; - - case json_type_array: - labelCount = json_object_array_length (jLabels); - break; - - case json_type_string: - jTmp = json_object_new_array (); - labelCount = 1; - json_object_array_add (jTmp, jLabels); - jLabels=jTmp; - break; - - default: - afb_req_fail_f (request, "ucmget-notarray","labels=%s not valid JSON array", labels); - goto OnErrorExit; - } - - for (int idx=0; idx < labelCount; idx++) { - json_object *jValue, *jLabel; - const char *label ; - - jLabel= json_object_array_get_idx (jLabels, idx); - label= json_object_get_string (jLabel); - jValue = ucmGetValue (&ucmHandles[ucmIdx], verb, mod, label); - if (jValue) json_object_object_add (jResponse, label, jValue); - else { - json_object_array_add (jWarnings, jLabel); - } - } - - // use info section to notified not found values label - if (json_object_array_length (jWarnings) > 0) { - json_object *jTmp = json_object_new_object (); - json_object_object_add (jTmp, "no-context", jWarnings); - warnings= json_object_to_json_string (jTmp); - } - afb_req_success (request, jResponse, warnings); - - OnErrorExit: - return; -} - -PUBLIC void alsaUseCaseSet(struct afb_req request) { - int err, ucmIdx; - queryValuesT queryValues; - json_object *jResponse = json_object_new_object(); - - err = alsaCheckQuery (request, &queryValues); - if (err) goto OnErrorExit; - - ucmIdx = alsaUseCaseOpen (request, &queryValues, TRUE); - if (ucmIdx < 0) goto OnErrorExit; - - snd_use_case_mgr_t *ucmMgr= ucmHandles[ucmIdx].ucm; - const char *cardName= ucmHandles[ucmIdx].cardName; - - const char *verb = afb_req_value(request, "verb"); - const char *mod = afb_req_value(request, "mod"); - const char *dev = afb_req_value(request, "dev"); - // Known identifiers: _verb - set current verb = value _enadev - enable given device = value _disdev - disable given device = value _swdev/{old_device} - new_device = value - - if (verb) { - err = snd_use_case_set (ucmMgr, "_verb", verb); - if (err) { - afb_req_fail_f (request, "ucmset-verb", "SndCard devid=[%s] name=[%s] Invalid UCM verb=[%s] err=%s", queryValues.devid, cardName, verb, snd_strerror(err)); - goto OnErrorExit; - } - } - - if (dev) { - err = snd_use_case_set (ucmMgr, "_enadev", dev); - if (err) { - afb_req_fail_f (request, "ucmset-dev", "SndCard devid=[%s] name=[%s] Invalid UCMverb=[%s] dev=%s err=%s", queryValues.devid, cardName, verb, dev, snd_strerror(err)); - goto OnErrorExit; - } - } - - if (mod) { - err = snd_use_case_set (ucmMgr, "_enamod", mod); - if (err) { - afb_req_fail_f (request, "ucmset-mod", "SndCard devid=[%s] name=[%s] Invalid UCM verb=[%s] mod=[%s] err=%s", queryValues.devid, cardName, verb, mod, snd_strerror(err)); - goto OnErrorExit; - } - } - - // label are requested transfert request to get - if (afb_req_value(request, "values")) return alsaUseCaseGet(request); - - if (queryValues.quiet <= 3) { - json_object *jValue; - - jValue = ucmGetValue (&ucmHandles[ucmIdx], verb, dev, "OutputDspName"); - if (jValue) json_object_object_add (jResponse, "OutputDspName", jValue); - - jValue = ucmGetValue (&ucmHandles[ucmIdx], verb, dev, "PlaybackPCM"); - if (jValue) json_object_object_add (jResponse, "PlaybackPCM", jValue); - - jValue = ucmGetValue (&ucmHandles[ucmIdx], verb, mod, "CapturePCM"); - if (jValue) json_object_object_add (jResponse, "CapturePCM", jValue); - } - afb_req_success (request, jResponse, NULL); - - OnErrorExit: - return; -} - - - -PUBLIC void alsaUseCaseReset (struct afb_req request) { - int err, ucmIdx; - queryValuesT queryValues; - - err = alsaCheckQuery (request, &queryValues); - if (err) goto OnErrorExit; - - ucmIdx = alsaUseCaseOpen (request, &queryValues, FALSE); - if (ucmIdx < 0) goto OnErrorExit; - - err= snd_use_case_mgr_reset (ucmHandles[ucmIdx].ucm); - if (err) { - afb_req_fail_f (request, "ucmreset-fail","devid=%s Card Name=%s", queryValues.devid, ucmHandles[ucmIdx].cardName); - goto OnErrorExit; - } - - afb_req_success (request, NULL, NULL); - - OnErrorExit: - return; -} - -PUBLIC void alsaUseCaseClose (struct afb_req request) { - int err, ucmIdx; - queryValuesT queryValues; - - err = alsaCheckQuery (request, &queryValues); - if (err) goto OnErrorExit; - - ucmIdx = alsaUseCaseOpen (request, &queryValues, FALSE); - if (ucmIdx < 0) goto OnErrorExit; - - err= snd_use_case_mgr_close (ucmHandles[ucmIdx].ucm); - if (err) { - afb_req_fail_f (request, "ucmreset-close","devid=%s Card Name=%s", queryValues.devid, ucmHandles[ucmIdx].cardName); - goto OnErrorExit; - } - - // do not forget to release sound card name string - free (ucmHandles[ucmIdx].cardName); - - afb_req_success (request, NULL, NULL); - - OnErrorExit: - return; -} - - |