Initial working version as independent repo

1 files changed, 0 insertions, 395 deletions

diff --git a/Alsa-afb/Alsa-RegEvt.c b/Alsa-afb/Alsa-RegEvt.c
deleted file mode 100644
index 41db207..0000000
--- a/Alsa-afb/Alsa-RegEvt.c
+++ /dev/null
@@ -1,395 +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.
-
- */
-
-#define _GNU_SOURCE  // needed for vasprintf
-
-#include "Alsa-ApiHat.h"
-
-// generic sndctrl event handle hook to event callback when pooling
-
-typedef struct {
-    struct pollfd pfds;
-    sd_event_source *src;
-    snd_ctl_t *ctlDev;
-    int mode;
-    struct afb_event afbevt;
-} evtHandleT;
-
-typedef struct {
-    int ucount;
-    int cardId;
-    evtHandleT *evtHandle;
-} sndHandleT;
-
-typedef struct {
-    char *devid;
-    char *apiprefix;
-    char *shortname;
-    char *longname;
-} cardRegistryT;
-
-cardRegistryT *cardRegistry[MAX_SND_CARD + 1];
-
-PUBLIC json_object *alsaCheckQuery(afb_req request, queryValuesT *queryValues) {
-
-    json_object *tmpJ;
-    int done;
-
-    // get query from request
-    json_object *queryInJ = afb_req_json(request);
-
-    done = json_object_object_get_ex(queryInJ, "devid", &tmpJ);
-    if (!done) {
-        afb_req_fail_f(request, "devid-missing", "Invalid query='%s'", json_object_get_string(queryInJ));
-        goto OnErrorExit;
-    }
-    queryValues->devid = json_object_get_string(tmpJ);
-
-    done = json_object_object_get_ex(queryInJ, "mode", &tmpJ);
-    if (!done) queryValues->mode = QUERY_QUIET; // default quiet
-    else queryValues->mode = json_object_get_int(tmpJ);
-
-    return queryInJ;
-
-OnErrorExit:
-    return NULL;
-}
-
-// 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, ctlNumid;
-    evtHandleT *evtHandle = (evtHandleT*) userData;
-    snd_ctl_event_t *eventId;
-    json_object *ctlEventJ;
-    unsigned int mask;
-    int iface;
-    int device;
-    int subdev;
-    const char*ctlName;
-    ctlRequestT ctlRequest;
-    snd_ctl_elem_id_t *elemId;
-
-    if ((revents & EPOLLHUP) != 0) {
-        AFB_NOTICE("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->mode);
-        if (err) goto OnErrorExit;
-
-        // If CTL as a value use it as container for response
-        if (ctlRequest.valuesJ) ctlEventJ = ctlRequest.valuesJ;
-        else {
-            ctlEventJ = json_object_new_object();
-            ctlNumid = snd_ctl_event_elem_get_numid(eventId);
-            json_object_object_add(ctlEventJ, "id", json_object_new_int(ctlNumid));
-        }
-
-        if (evtHandle->mode >= QUERY_COMPACT) {
-            ctlName = snd_ctl_event_elem_get_name(eventId);
-            json_object_object_add(ctlEventJ, "name", json_object_new_string(ctlName));
-        }
-
-        if (evtHandle->mode >= QUERY_VERBOSE) {
-            iface = snd_ctl_event_elem_get_interface(eventId);
-            device = snd_ctl_event_elem_get_device(eventId);
-            subdev = snd_ctl_event_elem_get_subdevice(eventId);
-            json_object_object_add(ctlEventJ, "ifc", json_object_new_int(iface));
-            json_object_object_add(ctlEventJ, "dev", json_object_new_int(device));
-            json_object_object_add(ctlEventJ, "sub", json_object_new_int(subdev));
-        }
-
-
-        AFB_DEBUG("sndCtlEventCB=%s", json_object_get_string(ctlEventJ));
-        afb_event_push(evtHandle->afbevt, ctlEventJ);
-    }
-
-ExitOnSucess:
-    return 0;
-
-OnErrorExit:
-    AFB_WARNING("sndCtlEventCB: ignored unsupported event type");
-    return (0);
-}
-
-// Subscribe to every Alsa CtlEvent send by a given board
-
-PUBLIC void alsaEvtSubcribe(afb_req request) {
-    static sndHandleT sndHandles[MAX_SND_CARD];
-    evtHandleT *evtHandle = NULL;
-    snd_ctl_t *ctlDev = NULL;
-    int err, idx, cardId, idxFree = -1;
-    snd_ctl_card_info_t *cardinfo;
-    queryValuesT queryValues;
-
-    json_object *queryJ = alsaCheckQuery(request, &queryValues);
-    if (!queryJ) goto OnErrorExit;
-
-    // open control interface for devid
-    err = snd_ctl_open(&ctlDev, queryValues.devid, SND_CTL_READONLY);
-    if (err < 0) {
-        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==%d", idx);
-            goto OnErrorExit;
-        }
-
-        evtHandle = malloc(sizeof (evtHandleT));
-        evtHandle->ctlDev = ctlDev;
-        evtHandle->mode = queryValues.mode;
-        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(), &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(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);
-        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
-
-STATIC json_object *alsaProbeCardId(afb_req request) {
-    char devid [10];
-    const char *ctlName, *shortname, *longname;
-    int card, err, index, idx;
-    json_object *responseJ;
-    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);
-        ctlName = 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, ctlName)) 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
-    responseJ = json_object_new_object();
-    json_object_object_add(responseJ, "index", json_object_new_int(index));
-    json_object_object_add(responseJ, "devid", json_object_new_string(devid));
-    json_object_object_add(responseJ, "shortname", json_object_new_string(shortname));
-    json_object_object_add(responseJ, "longname", json_object_new_string(longname));
-
-    // search for a HAL binder card mapping name to api prefix
-    for (idx = 0; (idx < MAX_SND_CARD && cardRegistry[idx]); idx++) {
-        if (!strcmp(cardRegistry[idx]->shortname, shortname)) {
-            json_object_object_add(responseJ, "halapi", json_object_new_string(cardRegistry[idx]->apiprefix));
-            break;
-        }
-    }
-
-    return responseJ;
-
-OnErrorExit:
-    return NULL;
-}
-
-// Make alsaProbeCardId compatible with AFB request
-
-PUBLIC void alsaGetCardId(afb_req request) {
-
-    json_object *responseJ = alsaProbeCardId(request);
-    if (responseJ) afb_req_success(request, responseJ, NULL);
-}
-
-// Return list of active resgistrated HAL with corresponding sndcard
-
-PUBLIC void alsaActiveHal(afb_req request) {
-    json_object *responseJ = json_object_new_array();
-
-    for (int idx = 0; idx < MAX_SND_CARD; idx++) {
-        if (!cardRegistry[idx]) break;
-
-        json_object *haldevJ = json_object_new_object();
-        json_object_object_add(haldevJ, "api", json_object_new_string(cardRegistry[idx]->apiprefix));
-        if (cardRegistry[idx]->devid) json_object_object_add(haldevJ, "devid", json_object_new_string(cardRegistry[idx]->devid));
-        if (cardRegistry[idx]->shortname)json_object_object_add(haldevJ, "shortname", json_object_new_string(cardRegistry[idx]->shortname));
-        if (cardRegistry[idx]->longname) json_object_object_add(haldevJ, "longname", json_object_new_string(cardRegistry[idx]->longname));
-        json_object_array_add(responseJ, haldevJ);
-    }
-
-    afb_req_success(request, responseJ, NULL);
-}
-
-
-// Register loaded HAL with board Name and API prefix
-
-PUBLIC void alsaRegisterHal(afb_req request) {
-    static int index = 0;
-    json_object *responseJ;
-    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, "sndname");
-    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;
-    }
-
-    // alsaGetCardId should be check to register only valid card
-    responseJ = alsaProbeCardId(request);
-    if (responseJ) {
-        json_object *tmpJ;
-        int done;
-
-        cardRegistry[index] = malloc(sizeof (cardRegistry));
-        cardRegistry[index]->apiprefix = strdup(apiPrefix);
-        cardRegistry[index]->shortname = strdup(shortname);
-
-        done = json_object_object_get_ex(responseJ, "devid", &tmpJ);
-        if (done) cardRegistry[index]->devid = strdup(json_object_get_string(tmpJ));
-        else cardRegistry[index]->devid = NULL;
-
-        done = json_object_object_get_ex(responseJ, "longname", &tmpJ);
-        if (done) cardRegistry[index]->longname = strdup(json_object_get_string(tmpJ));
-        else cardRegistry[index]->longname = NULL;
-
-        // make sure register close with a null value
-        index++;
-        cardRegistry[index] = NULL;
-
-        afb_req_success(request, responseJ, NULL);
-    }
-
-    // If OK return sound card Alsa ID+Info
-    return;
-
-OnErrorExit:
-    return;
-}
-