3 files changed, 207 insertions, 0 deletions
diff --git a/Audio-Interface/CMakeLists.txt b/Audio-Interface/CMakeLists.txt
new file mode 100644
index 0000000..665007f
--- /dev/null
+++ b/Audio-Interface/CMakeLists.txt
@@ -0,0 +1,37 @@
+###########################################################################
+# Copyright 2015, 2016, 2017 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.
+###########################################################################
+
+# Add target to project dependency list
+PROJECT_TARGET_ADD(audio-interface)
+
+    # Define targets 
+    ADD_LIBRARY(audio-interface STATIC audio-interface.c)
+
+    # Library properties
+    SET_TARGET_PROPERTIES(audio-interface PROPERTIES OUTPUT_NAME audiointerface)
+
+    # Library dependencies
+    #TARGET_LINK_LIBRARIES(audio-interface
+    #  empty
+    #)
+   
+    # Define target includes
+    TARGET_INCLUDE_DIRECTORIES(audio-interface 
+        PUBLIC  ${CMAKE_CURRENT_SOURCE_DIR}
+    )
+
diff --git a/Audio-Interface/audio-interface.c b/Audio-Interface/audio-interface.c
new file mode 100644
index 0000000..c1c4054
--- /dev/null
+++ b/Audio-Interface/audio-interface.c
@@ -0,0 +1,102 @@
+/*
+ * 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  // needed for vasprintf
+
+#include <json-c/json.h>
+#include <afb/afb-binding.h>
+#include <afb/afb-service-itf.h>
+#include <semaphore.h>
+#include <string.h>
+
+#include "audio-interface.h"
+
+typedef struct {
+    int index;
+    int numid;
+} shareHallMap_T;
+
+
+PUBLIC int cbCheckResponse(struct afb_req request, int iserror, struct json_object *result) {
+    struct json_object *response, *status, *info;
+
+    if (iserror) { // on error proxy information we got from lower layer
+        if (result) {
+            if (json_object_object_get_ex(result, "request", &response)) {
+                json_object_object_get_ex(response, "info", &info);
+                json_object_object_get_ex(response, "status", &status);
+                afb_req_fail(request, json_object_get_string(status), json_object_get_string(info));
+                goto OnErrorExit;
+            }
+        } else {
+            afb_req_fail(request, "cbCheckFail", "No Result inside API response");
+        }
+        goto OnErrorExit;
+    }
+    return (0);
+
+OnErrorExit:
+    return (-1);
+}
+
+
+// This function should be part of Generic AGL Framework
+PUBLIC json_object* afb_service_call_sync(struct afb_service srvitf, struct afb_req request, char* api, char* verb, struct json_object* queryurl) {
+    json_object* response = NULL;
+    int status = 0;
+    sem_t semid;
+
+    // Nested procedure are allow in GNU and allow us to keep caller stack valid
+
+    void callback(void *handle, int iserror, struct json_object *result) {
+
+        // Process Basic Error
+        if (!cbCheckResponse(request, iserror, result)) {
+            status = -1;
+            goto OnExitCB;
+        }
+
+        // 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 alsa/getcontrol result=[%s]", json_object_get_string(result));
+            goto OnExitCB;
+        }
+
+OnExitCB:
+        sem_post(&semid);
+    }
+
+    // Create an exclusive semaphore
+    status = sem_init(&semid, 0, 0);
+    if (status < 0) {
+        afb_req_fail_f(request, "error:seminit", "Fail to allocate semaphore err=[%s]", strerror(status));
+        goto OnExit;
+    }
+
+    // Call service and wait for call back to finish before moving any further
+    afb_service_call(srvitf, api, verb, queryurl, callback, NULL);
+    sem_wait(&semid);
+
+OnExit:
+    return (response);
+}
+
+PUBLIC void pingtest(struct afb_req request) {
+    json_object *query = afb_req_json(request);
+    afb_req_success(request, query, NULL);
+}
diff --git a/Audio-Interface/audio-interface.h b/Audio-Interface/audio-interface.h
new file mode 100644
index 0000000..ffefbfc
--- /dev/null
+++ b/Audio-Interface/audio-interface.h
@@ -0,0 +1,68 @@
+/*
+ * 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.
+ * 
+ * reference: 
+ *   amixer contents; amixer controls;
+ *   http://www.tldp.org/HOWTO/Alsa-sound-6.html 
+ */
+
+#ifndef AUDIOCOMMON_H
+#define AUDIOCOMMON_H
+
+#include <json-c/json.h>
+#include <afb/afb-binding.h>
+#include <afb/afb-service-itf.h>
+
+#ifndef PUBLIC
+  #define PUBLIC
+#endif
+#define STATIC static
+
+// Most controls are MIXER but some vendor specific are possible
+typedef enum {
+    OUTVOL,
+    PCMVOL,
+    INVOL,
+    SWITCH,
+    ROUTE,
+    CARD,
+    ENUM,
+} halGroupEnumT;
+
+typedef enum {
+    READ,
+    WRITE,
+    RW,
+} halAclEnumT;
+
+typedef enum {
+   StartHalCrlTag=0,
+
+   // HighLevel Audio Control List
+   Master_Playback_Volume,
+   PCM_Playback_Volume,
+   PCM_Playback_Switch,
+   Capture_Volume,
+
+   EndHalCrlTag // used to compute number of ctls
+} halCtlsEnumT;
+
+PUBLIC int cbCheckResponse(struct afb_req request, int iserror, struct json_object *result) ;
+PUBLIC json_object* afb_service_call_sync(struct afb_service srvitf, struct afb_req request, char* api, char* verb, struct json_object* queryurl);
+PUBLIC void pingtest(struct afb_req request);
+
+#endif /* AUDIOCOMMON_H */
+