1 files changed, 316 insertions, 0 deletions
diff --git a/HighLevel-afb/HighLevelBinding.c b/HighLevel-afb/HighLevelBinding.c
new file mode 100644
index 0000000..df5f2c3
--- /dev/null
+++ b/HighLevel-afb/HighLevelBinding.c
@@ -0,0 +1,316 @@
+/*
+ * Copyright (C) 2016 "IoT.bzh"
+ * Author 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
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <netdb.h>
+#include <fcntl.h>
+#include <math.h>
+#include <sys/time.h>
+#include <sys/types.h>
+
+#include "HighLevelBinding.h"
+
+static struct afb_service srvitf;
+
+
+// This callback is fired when afb_service_call for api/alsacore/subctl returns
+STATIC void audioLogicSetVolCB(void *handle, int iserror, struct json_object *result) {
+    struct afb_req request = afb_req_unstore(handle);
+
+    if (!cbCheckResponse(request, iserror, result)) goto OnExit;
+
+OnExit:
+    return;
+}
+
+PUBLIC void audioLogicSetVol(struct afb_req request) {
+    struct json_object *queryurl;
+    int volume=0; // FULUP TBD !!!!!!!!!!!!
+
+    // keep request for callback to respond
+    struct afb_req *handle = afb_req_store(request);
+
+    // get client context
+    AudioLogicCtxT *ctx = afb_req_context_get(request);
+
+    const char *vol = afb_req_value(request, "vol");
+    if (vol == NULL) {
+        afb_req_fail_f(request, "argument-missing", "vol=+-%[0,100] missing");
+        goto OnExit;
+    }
+
+    switch (vol[0]) {
+        case '+':
+            break;
+        case '-':
+            break;
+        case '%':
+            break;
+
+        default:
+            afb_req_fail_f(request, "value-invalid", "volume should be (+-%[0-100]xxx) vol=%s", vol);
+            goto OnExit;
+    }
+
+    if (!ctx->halapi) {
+        afb_req_fail_f(request, "context-invalid", "No valid halapi in client context");
+        goto OnExit;
+    }
+
+    // ********** Caluler le volume en % de manière intelligente    
+    queryurl = json_object_new_object();
+    json_object_object_add(ctx->queryurl, "pcm", json_object_new_int(Master_Playback_Volume));
+    json_object_object_add(ctx->queryurl, "value", json_object_new_int(volume));
+
+    // subcontract HAL API to process volume
+    afb_service_call(srvitf, ctx->halapi, "volume", queryurl, audioLogicSetVolCB, handle);
+
+    // final success/failure messages handle from callback
+OnExit:
+    return;
+}
+
+// This callback is fired when afb_service_call for api/alsacore/subctl returns
+
+STATIC void alsaSubcribeCB(void *handle, int iserror, struct json_object *result) {
+    struct afb_req request = afb_req_unstore(handle);
+
+    if (!cbCheckResponse(request, iserror, result)) goto OnExit;
+
+OnExit:
+    return;
+}
+
+// Create and subscribe to alsacore ctl events
+PUBLIC void audioLogicMonitor(struct afb_req request) {
+
+
+    // get client context
+    AudioLogicCtxT *ctx = afb_req_context_get(request);
+    if (!ctx) {
+        afb_req_fail_f(request, "ctx-notfound", "No Client Context HAL/getcontrol devid=[%] name=[%s]", ctx->devid, ctx->shortname);
+        goto OnExit;
+    }
+
+    // push request to low level binding
+    NOTICE(afbIface, "audioLogicMonitor ctx->devid=%s [ctx->queryurl=%s]", ctx->devid, json_object_to_json_string(ctx->queryurl));
+
+    if (ctx->queryurl) {
+        json_object_get(ctx->queryurl); // Make sure usage count does not fall to zero
+        struct afb_req *handle = afb_req_store(request);
+        afb_service_call(srvitf, "alsacore", "subscribe", ctx->queryurl, alsaSubcribeCB, handle);
+    }
+    else afb_req_fail_f(request, "context-invalid", "No valid queryurl in client context");
+
+    // success/failure messages return from callback  
+OnExit:
+    return;
+}
+
+// Subscribe to AudioBinding events
+
+PUBLIC void audioLogicSubscribe(struct afb_req request) {
+
+    return;
+}
+
+
+// Call when all bindings are loaded and ready to accept request
+PUBLIC void audioLogicGetVol(struct afb_req request) {
+
+    // Should call here Hardware Alsa Abstraction Layer for corresponding Sound Card
+    afb_req_success(request, NULL, NULL);
+    return;
+
+}
+
+// This callback is fired when afb_service_call for api/alsacore/subctl returns
+
+STATIC void audioLogicOpenCB2(void *handle, int iserror, struct json_object *result) {
+    struct json_object *response;
+
+    // Make sure we got a response from API
+    struct afb_req request = afb_req_unstore(handle);
+    if (!cbCheckResponse(request, iserror, result)) goto OnExit;
+
+        // get client context
+    AudioLogicCtxT *ctx = afb_req_context_get(request);
+    if (!ctx) {
+        afb_req_fail_f(request, "ctx-notfound", "No Client Context HAL/getcontrol devid=[%] name=[%s]", ctx->devid, ctx->shortname);
+        goto OnExit;
+    }
+    
+    // Get response from object
+    json_object_object_get_ex(result, "response", &response);
+    if (!response) {
+        afb_req_fail_f(request, "response-notfound", "No Controls return from HAL/getcontrol devid=[%] name=[%s]", ctx->devid, ctx->shortname);
+        goto OnExit;
+    }
+
+    // extract sounds controls information from received Object 
+    struct json_object *ctls;
+    json_object_object_get_ex(response, "ctls", &ctls);
+    if (!ctls) {
+        afb_req_fail_f(request, "ctls-notfound", "No Controls return from HAL/getcontrol devid=[%] name=[%s]", ctx->devid, ctx->shortname);
+        goto OnExit;
+    }
+
+    // make sure return controls have a valid type
+    if (json_object_get_type(ctls) != json_type_array) {
+        afb_req_fail_f(request, "ctls-notarray", "Invalid Controls return from HAL/getcontrol devid=[%] name=[%s]", ctx->devid, ctx->shortname);
+        goto OnExit;
+    }
+
+    // loop on array and store values into client context
+    for (int idx = 0; idx < json_object_array_length(ctls); idx++) {
+        struct json_object *ctl;
+        halCtlsEnumT control;
+        int value;
+
+        ctl = json_object_array_get_idx(ctls, idx);
+        if (json_object_array_length(ctl) != 2) {
+            afb_req_fail_f(request, "ctl-invalid", "Invalid Control return from HAL/getcontrol devid=[%] name=[%s] ctl=%s"
+                    , ctx->devid, ctx->shortname, json_object_get_string(ctl));
+            goto OnExit;
+        }
+
+        // As HAL and Business logic use the same AlsaMixerHal.h direct conversion is not an issue
+        control = (halCtlsEnumT) json_object_get_int(json_object_array_get_idx(ctl, 0));
+        value = json_object_get_int(json_object_array_get_idx(ctl, 1));
+
+        switch (control) {
+            case Master_Playback_Volume:
+                ctx->volumes.masterPlaybackVolume = value;
+                break;
+
+            case PCM_Playback_Volume:
+                ctx->volumes.pcmPlaybackVolume = value;
+                break;
+
+            case PCM_Playback_Switch:
+                ctx->volumes.pcmPlaybackSwitch = value;
+                break;
+
+            case Capture_Volume:
+                ctx->volumes.captureVolume = value;
+                break;
+
+            default:
+                NOTICE(afbIface, "audioLogicOpenCB2 unknown HAL control=[%s]", json_object_get_string(ctl));
+        }
+    }
+
+OnExit:
+    afb_req_context_set(request, ctx, free);
+    return;
+}
+
+// This callback is fired when afb_service_call for api/alsacore/subctl returns
+STATIC void audioLogicOpenCB1(void *handle, int iserror, struct json_object *result) {
+    struct json_object *response, *subobj;
+
+    // Make sure we got a valid API response
+    struct afb_req request = afb_req_unstore(handle);
+    if (!cbCheckResponse(request, iserror, result)) goto OnExit;
+
+    // Get response from object
+    json_object_object_get_ex(result, "response", &response);
+    if (!response) {
+        afb_req_fail_f(request, "response-notfound", "No Controls return from HAL/getcontrol");
+        goto OnExit;
+    }
+
+    // attach client context to session
+    AudioLogicCtxT *ctx = malloc(sizeof (AudioLogicCtxT));
+
+    // extract information from Json Alsa Object 
+    json_object_object_get_ex(response, "cardid", &subobj);
+    if (subobj) ctx->cardid = json_object_get_int(subobj);
+
+    // store devid as an object for further alsa request
+    json_object_object_get_ex(response, "devid", &subobj);
+    if (subobj) ctx->devid = strdup(json_object_get_string(subobj));
+
+    json_object_object_get_ex(response, "halapi", &subobj);
+    if (subobj) ctx->halapi = strdup(json_object_get_string(subobj));
+
+    json_object_object_get_ex(response, "shortname", &subobj);
+    if (subobj)ctx->shortname = strdup(json_object_get_string(subobj));
+
+    json_object_object_get_ex(response, "longname", &subobj);
+    if (subobj)ctx->longname = strdup(json_object_get_string(subobj));
+
+    // save queryurl with devid only for further ALSA request
+    ctx->queryurl = json_object_new_object();
+    json_object_object_add(ctx->queryurl, "devid", json_object_new_string(ctx->devid));
+
+    afb_req_context_set(request, ctx, free);
+
+    // sound card was find let's store keycontrols into client session
+    if (!ctx->halapi) {
+        afb_req_fail_f(request, "hal-notfound", "No HAL found devid=[%] name=[%s]", ctx->devid, ctx->shortname);
+        goto OnExit;
+    }
+
+    struct json_object *queryurl = json_object_new_object();
+    struct json_object *ctls = json_object_new_array();
+
+    // add sound controls we want to keep track of into client session context
+    json_object_array_add(ctls, json_object_new_int((int) Master_Playback_Volume));
+    json_object_array_add(ctls, json_object_new_int((int) PCM_Playback_Volume));
+    json_object_array_add(ctls, json_object_new_int((int) PCM_Playback_Switch));
+    json_object_array_add(ctls, json_object_new_int((int) Capture_Volume));
+
+    // send request to soundcard HAL binding
+    json_object_object_add(queryurl, "ctls", ctls);
+    handle = afb_req_store(request);  // FULUP ???? Needed for 2nd Callback ????
+    afb_service_call(srvitf, ctx->halapi, "getControl", queryurl, audioLogicOpenCB2, handle);
+
+    afb_req_success(request, response, NULL);
+
+OnExit:
+    // release original calling request
+    afb_req_unref(request);
+    return;
+}
+
+// Delegate to lowerlevel the mapping of soundcard name with soundcard ID
+PUBLIC void audioLogicOpen(struct afb_req request) {
+
+    // Delegate query to lower level
+    struct afb_req *handle = afb_req_store(request);
+    afb_service_call(srvitf, "alsacore", "getCardId", json_object_get(afb_req_json(request)), audioLogicOpenCB1, handle);
+}
+
+// Free client context create from audioLogicOpenCB
+PUBLIC void audioLogicClose(struct afb_req request) {
+
+    // retrieve current client context to print debug info
+    AudioLogicCtxT *ctx = (AudioLogicCtxT*) afb_req_context_get(request);
+    DEBUG(afbIface, "audioLogicClose cardid=%d devid=%s shortname=%s longname=%s", ctx->cardid, ctx->devid, ctx->shortname, ctx->longname);
+}
+
+
+// this function is call after all binder are loaded and initialised
+PUBLIC int audioLogicInit(struct afb_service service) {
+    srvitf = service;
+    return 0;
+}