isolate structure use in policy util from HLB

1 files changed, 1240 insertions, 307 deletions

diff --git a/src/ahl-binding.c b/src/ahl-binding.c
index 4b075c0..264930f 100644
--- a/src/ahl-binding.c
+++ b/src/ahl-binding.c
@@ -1,6 +1,5 @@
 /*
  * Copyright (C) 2017 "Audiokinetic Inc"
- * Author Francois Thibault <fthibault@audiokinetic.com>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,43 +21,160 @@
 #include "ahl-binding.h"
 #include "ahl-apidef.h" // Generated from JSON OpenAPI
 #include "wrap-json.h"
+#include "ahl-policy.h"
+#include "ahl-policy-utils.h"
 
 // Global high-level binding context
-AHLCtxT g_AHLCtx;
-
-// Workshop development topics:
-// - Associating streamID with a client id of afb. Has to be done with sessions?
-// - Declaring dependencies on other binding services (examples)
-// - json_object_put to free JSON objects? potential leaks currently
-// - no events on new HAL registered to alsacore?
-// - unregistering event subscription examples?
-// - discussion how to use property and event system to dispatch external parameterization (e.g. Wwise/Fiberdyne)
-// - discussion where to best isolate policy (controller or HLB plugin)
-// - Other HLB attributes to pass through (e.g. interrupted behavior) 
-// - DBScale TLV warning
-// - GLib (internal) dependency
-// - HAL registration dependency (initialization order)
-// - Binding startup arguments for config file path
-// - Can we use the same HAL for different card numbers?
-// - Example use of volume ramping in HAL?
-// - Binding termination function
-// - AGL persistence framework?
-// - How to provide API services with config.xml (secrets and all)
-
-
-// Helper macros/func for packaging JSON objects from C structures
-#define EndpointInfoStructToJSON(__JSON_OBJECT__, __ENDPOINTINFOSTRUCT__) \
-    wrap_json_pack(&__JSON_OBJECT__, "{s:i,s:i,s:s,s:i}",\
-                    "endpoint_id", __ENDPOINTINFOSTRUCT__.endpointID, \
-                    "endpoint_type", __ENDPOINTINFOSTRUCT__.type, \
-                    "device_name", __ENDPOINTINFOSTRUCT__.deviceName, \
-                    "device_uri_type", __ENDPOINTINFOSTRUCT__.deviceURIType);
+AHLCtxT g_AHLCtx; 
+
+// TODO: Helpers that could be common
+static EndpointTypeT EndpointTypeToEnum(char * in_pEndpointTypeStr)
+{
+    if (in_pEndpointTypeStr == NULL) {
+        return ENDPOINTTYPE_MAXVALUE;
+    }
+    else if (strcasecmp(in_pEndpointTypeStr,AHL_ENDPOINTTYPE_SOURCE)==0) {
+        return ENDPOINTTYPE_SOURCE;
+    }
+    else if (strcasecmp(in_pEndpointTypeStr,AHL_ENDPOINTTYPE_SINK)==0) {
+        return ENDPOINTTYPE_SINK;
+    }
+    else 
+        return ENDPOINTTYPE_MAXVALUE;
+}
+
+static StreamStateT StreamStateToEnum(char * in_pStreamStateStr)
+{
+    if (in_pStreamStateStr == NULL) {
+        return STREAM_STATE_MAXVALUE;
+    }
+    else if (strcasecmp(in_pStreamStateStr,AHL_STREAM_STATE_IDLE)==0) {
+        return STREAM_STATE_IDLE;
+    }
+    else if (strcasecmp(in_pStreamStateStr,AHL_STREAM_STATE_RUNNING)==0) {
+        return STREAM_STATE_RUNNING;
+    }
+    else if (strcasecmp(in_pStreamStateStr,AHL_STREAM_STATE_PAUSED)==0) {
+        return STREAM_STATE_PAUSED;
+    }
+    else 
+        return STREAM_STATE_MAXVALUE;
+}
+
+static StreamMuteT StreamMuteToEnum(char * in_pStreamMuteStr)
+{
+    if (in_pStreamMuteStr == NULL) {
+        return STREAM_MUTE_MAXVALUE;
+    }
+    else if (strcasecmp(in_pStreamMuteStr,AHL_STREAM_UNMUTED)==0) {
+        return STREAM_UNMUTED;
+    }
+    else if (strcasecmp(in_pStreamMuteStr,AHL_STREAM_MUTED)==0) {
+        return STREAM_MUTED;
+    }
+    else 
+        return STREAM_MUTE_MAXVALUE;
+}
+
+static char * DeviceURITypeEnumToStr(DeviceURITypeT in_eDeviceURIType) {
+    switch(in_eDeviceURIType) {
+        case DEVICEURITYPE_ALSA_HW:  // Alsa hardware device URI
+            return AHL_DEVICEURITYPE_ALSA_HW;
+        case DEVICEURITYPE_ALSA_DMIX:    // Alsa Dmix device URI (only for playback devices)
+            return AHL_DEVICEURITYPE_ALSA_DMIX;
+        case DEVICEURITYPE_ALSA_DSNOOP:  // Alsa DSnoop device URI (only for capture devices)
+            return AHL_DEVICEURITYPE_ALSA_DSNOOP;
+        case DEVICEURITYPE_ALSA_SOFTVOL: // Alsa softvol device URI
+            return AHL_DEVICEURITYPE_ALSA_SOFTVOL;
+        case DEVICEURITYPE_ALSA_PLUG:    // Alsa plug device URI
+            return AHL_DEVICEURITYPE_ALSA_PLUG;
+        case DEVICEURITYPE_ALSA_OTHER:   // Alsa domain URI device of unspecified type
+            return AHL_DEVICEURITYPE_ALSA_OTHER;
+        case DEVICEURITYPE_NOT_ALSA:     // Unknown (not ALSA domain)
+            return AHL_DEVICEURITYPE_NOT_ALSA;
+        default:
+            return "Unknown";
+    }
+}
+
+static char * StreamStateEnumToStr(StreamStateT in_eStreamState) {
+    switch(in_eStreamState) {
+        case STREAM_STATE_IDLE:
+            return AHL_STREAM_STATE_IDLE;
+        case STREAM_STATE_RUNNING: 
+            return AHL_STREAM_STATE_RUNNING;
+        case STREAM_STATE_PAUSED: 
+            return AHL_STREAM_STATE_PAUSED;
+        default:
+            return "Unknown";
+    }
+}
+
+static char * StreamMuteEnumToStr(StreamMuteT in_eStreamMute) {
+    switch(in_eStreamMute) {
+        case STREAM_UNMUTED: 
+            return AHL_STREAM_UNMUTED;
+        case STREAM_MUTED: 
+            return AHL_STREAM_MUTED;
+        default:
+            return "Unknown";
+    }
+}
+
+static void AudioFormatStructToJSON(json_object **audioFormatJ, AudioFormatT * pAudioFormat)
+{
+    wrap_json_pack(audioFormatJ, "{s:i,s:i,s:i}",
+                    "sample_rate", pAudioFormat->sampleRate, 
+                    "num_channels", pAudioFormat->numChannels, 
+                    "sample_type", pAudioFormat->sampleType);
+}
+
+// Package only information that can useful to application clients when selecting endpoint
+static void EndpointInfoStructToJSON(json_object **endpointInfoJ, EndpointInfoT * pEndpointInfo)
+{
+    json_object *formatInfoJ = NULL;
+    wrap_json_pack(endpointInfoJ, "{s:i,s:s,s:s,s:s,s:s,s:s,s:s}",
+                    "endpoint_id", pEndpointInfo->endpointID, 
+                    "endpoint_type", (pEndpointInfo->type == ENDPOINTTYPE_SOURCE) ? AHL_ENDPOINTTYPE_SOURCE : AHL_ENDPOINTTYPE_SINK,
+                    "device_name", pEndpointInfo->gsDeviceName, 
+                    "display_name", pEndpointInfo->gsDisplayName,
+                    "audio_role", pEndpointInfo->pRoleName,
+                    "device_domain",pEndpointInfo->gsDeviceDomain,
+                    "device_uri_type", DeviceURITypeEnumToStr(pEndpointInfo->deviceURIType));
+    AudioFormatStructToJSON(&formatInfoJ,&pEndpointInfo->format);
+    json_object_object_add(*endpointInfoJ,"format",formatInfoJ);
+
+    // Properties
+    if (pEndpointInfo->pPropTable) {
+        json_object *pPropTableJ = json_object_new_array();
+        
+        GHashTableIter iter;
+        gpointer key, value;
+        g_hash_table_iter_init (&iter, pEndpointInfo->pPropTable);
+        while (g_hash_table_iter_next (&iter, &key, &value))
+        {
+            if((key!=NULL) && (value!=NULL))
+            {
+                json_object *pPropertyJ = NULL;
+                json_object_get((json_object*)value); // Don't let the framework free our object when the request is done
+                wrap_json_pack(&pPropertyJ, "{s:s,s:o}","property_name", (char*)key, "property_value", (json_object*)value);
+                json_object_array_add(pPropTableJ, pPropertyJ);
+            }
+        }
+        json_object_object_add(*endpointInfoJ,"properties",pPropTableJ);
+    }
+}
  
-static void StreamInfoStructToJSON(json_object **streamInfoJ, StreamInfoT streamInfo)
+// Package only information that can useful to application clients when opening a stream
+static void StreamInfoStructToJSON(json_object **streamInfoJ, StreamInfoT * pStreamInfo)
 {
-    json_object *endpointInfoJ;
-    EndpointInfoStructToJSON(endpointInfoJ,streamInfo.endpointInfo);
-    wrap_json_pack(streamInfoJ, "{s:i}", "stream_id", streamInfo.streamID);
+    json_object *endpointInfoJ = NULL;
+    EndpointInfoStructToJSON(&endpointInfoJ,pStreamInfo->pEndpointInfo);
+    wrap_json_pack(streamInfoJ, "{s:i,s:s,s:s,s:s}", 
+        "stream_id", pStreamInfo->streamID,
+        "state", StreamStateEnumToStr(pStreamInfo->streamState),
+        "mute", StreamMuteEnumToStr(pStreamInfo->streamMute),   
+        "device_uri",pStreamInfo->pEndpointInfo->gsDeviceURI); // Need to open a stream to have access to the device URI
     json_object_object_add(*streamInfoJ,"endpoint_info",endpointInfoJ);
 }
 
@@ -69,86 +185,378 @@ static streamID_t CreateNewStreamID()
     return newID;
 }
 
-static int FindRoleIndex( const char * in_pAudioRole)
+static EndpointInfoT * GetEndpointInfoWithRole(endpointID_t in_endpointID, EndpointTypeT in_endpointType, RoleInfoT * in_pRole)
 {
-    int index = -1; // Not found
-    for (int i = 0; i < g_AHLCtx.policyCtx.iNumberRoles; i++)
-    {
-        GString gs = g_array_index( g_AHLCtx.policyCtx.pAudioRoles, GString, i );
-        if ( strcasecmp(gs.str,in_pAudioRole) == 0 )
-            index = i;
+    EndpointInfoT * pEndpointInfo = NULL;
+    GPtrArray * pDeviceArray = NULL;
+    if (in_endpointType == ENDPOINTTYPE_SOURCE){
+        pDeviceArray = in_pRole->pSourceEndpoints;
+    }
+    else { 
+        pDeviceArray = in_pRole->pSinkEndpoints;
     }
-    return index;
+    g_assert_nonnull(pDeviceArray);
+
+    for (int j = 0; j < pDeviceArray->len; j++) {
+        EndpointInfoT * pCurEndpointInfo = g_ptr_array_index(pDeviceArray,j);
+        g_assert_nonnull(pCurEndpointInfo);
+        if (pCurEndpointInfo->endpointID == in_endpointID) {
+            pEndpointInfo = pCurEndpointInfo;
+            break;
+        }
+    }
+
+    return pEndpointInfo;
+}
+
+static int ReplaceEndpointInfoWithRole(endpointID_t in_endpointID, EndpointTypeT in_endpointType, RoleInfoT * in_pRole, EndpointInfoT * in_pNewEndpoint)
+{
+    GPtrArray * pDeviceArray = NULL;
+    if (in_endpointType == ENDPOINTTYPE_SOURCE){
+        pDeviceArray = in_pRole->pSourceEndpoints;
+    }
+    else { 
+        pDeviceArray = in_pRole->pSinkEndpoints;
+    }
+    g_assert_nonnull(pDeviceArray);
+
+    for (int j = 0; j < pDeviceArray->len; j++) {
+        EndpointInfoT * pCurEndpointInfo = g_ptr_array_index(pDeviceArray,j);
+        g_assert_nonnull(pCurEndpointInfo);
+        if (pCurEndpointInfo->endpointID == in_endpointID) {            
+            g_ptr_array_insert(pDeviceArray,j,in_pNewEndpoint);
+            g_ptr_array_remove_index(pDeviceArray,j+1);
+            TermEndpointInfo(pCurEndpointInfo);
+            // GLib automatically frees item upon array removal
+            return AHL_SUCCESS;
+        }
+    }
+
+    return AHL_FAIL;
 }
 
 static EndpointInfoT * GetEndpointInfo(endpointID_t in_endpointID, EndpointTypeT in_endpointType)
 {
     EndpointInfoT * pEndpointInfo = NULL;
-    for (int i = 0; i < g_AHLCtx.policyCtx.iNumberRoles; i++)
+
+    GHashTableIter iter;
+    gpointer key, value;      
+    g_hash_table_iter_init (&iter, g_AHLCtx.policyCtx.pRoleInfo);
+    while (pEndpointInfo == NULL && g_hash_table_iter_next (&iter, &key, &value))
     {
-        GArray * pRoleDeviceArray = NULL;
-        if (in_endpointType == ENDPOINTTYPE_SOURCE){
-            pRoleDeviceArray = g_ptr_array_index( g_AHLCtx.policyCtx.pSourceEndpoints, i );
+        RoleInfoT * pRoleInfo = (RoleInfoT*)value;
+        pEndpointInfo = GetEndpointInfoWithRole(in_endpointID,in_endpointType,pRoleInfo);
+    }
+
+    return pEndpointInfo;
+}
+
+static StreamInfoT * GetStream(streamID_t in_streamID)
+{
+    if (g_AHLCtx.policyCtx.pStreams == NULL)
+        return NULL;
+    
+    return g_hash_table_lookup(g_AHLCtx.policyCtx.pStreams,GINT_TO_POINTER(&in_streamID));
+}
+
+static RoleInfoT * GetRole(char * in_pAudioRoleName)
+{
+    if (g_AHLCtx.policyCtx.pRoleInfo == NULL)
+        return NULL;
+    
+    return g_hash_table_lookup(g_AHLCtx.policyCtx.pRoleInfo,in_pAudioRoleName);
+}
+
+static AHLClientCtxT * AllocateClientContext()
+{
+    AHLClientCtxT * pClientCtx = malloc(sizeof(AHLClientCtxT));
+    pClientCtx->pStreamAccessList = g_array_new(FALSE, TRUE, sizeof(streamID_t));
+    return pClientCtx;
+}
+
+static void TerminateClientContext(void * ptr)
+{
+    AHLClientCtxT * pClientCtx = (AHLClientCtxT *) ptr;
+    if (pClientCtx != NULL) {
+
+        // Avoid having policy in bad state if client loses WS connection (e.g. app termination without close stream)
+        // Force close streams in those cases.
+ 
+        if (pClientCtx->pStreamAccessList != NULL) {
+#ifndef AHL_DISCONNECT_POLICY 
+            for (int i = 0; i < pClientCtx->pStreamAccessList->len; i++)
+            {
+                streamID_t streamID = g_array_index(pClientCtx->pStreamAccessList,streamID_t,i);
+                // Call policy to verify whether creating a new audio stream is allowed in current context and possibly take other actions
+                StreamInfoT * pStreamInfo = GetStream(streamID);
+                if (pStreamInfo == NULL) {
+                    AFB_ERROR("Specified stream not currently active stream_id -> %d",streamID);
+                    return;
+                }
+                
+                json_object *pPolicyStreamJ = NULL;
+                int err = PolicyStreamStructToJSON(pStreamInfo, &pPolicyStreamJ);
+                if (err == AHL_POLICY_UTIL_FAIL)
+                {
+                    AFB_ERROR("Audio policy violation, Unable to get JSON object for Policy_CloseStream");
+                    return;
+                } 
+                Policy_CloseStream(pPolicyStreamJ);
+            }  
+#endif
+            g_array_free( pClientCtx->pStreamAccessList, TRUE);
+            pClientCtx->pStreamAccessList = NULL;
         }
-        else{
-            pRoleDeviceArray = g_ptr_array_index( g_AHLCtx.policyCtx.pSinkEndpoints, i );
+        free(pClientCtx);
+    }
+}
+
+static int CheckStreamAccessControl(AHLClientCtxT * pClientCtx, streamID_t streamID)
+{
+    int iAccessControl = AHL_ACCESS_CONTROL_DENIED;
+    if (pClientCtx && pClientCtx->pStreamAccessList) {
+        for (int i = 0; i < pClientCtx->pStreamAccessList->len ; i++) {
+            streamID_t iID = g_array_index(pClientCtx->pStreamAccessList,streamID_t,i);
+            if (iID == streamID) {
+                iAccessControl = AHL_ACCESS_CONTROL_GRANTED;
+            }    
         }
-        for (int j = 0; j < pRoleDeviceArray->len; j++) {
-            EndpointInfoT * pCurEndpointInfo = &g_array_index(pRoleDeviceArray,EndpointInfoT,j);
-            if (pCurEndpointInfo->endpointID == in_endpointID) {
-                pEndpointInfo = pCurEndpointInfo;
-                break;
+    }
+    return iAccessControl;
+}
+
+static int CreateEvents()
+{
+    int err = 0;
+
+    g_AHLCtx.policyCtx.propertyEvent = afb_daemon_make_event(AHL_ENDPOINT_PROPERTY_EVENT);
+    err = !afb_event_is_valid(g_AHLCtx.policyCtx.propertyEvent);
+    if (err) {
+        AFB_ERROR("Could not create endpoint property change event");
+        return err;
+    }
+
+    g_AHLCtx.policyCtx.volumeEvent = afb_daemon_make_event(AHL_ENDPOINT_VOLUME_EVENT);
+    err = !afb_event_is_valid(g_AHLCtx.policyCtx.volumeEvent);
+    if (err) {
+        AFB_ERROR("Could not create endpoint volume change event");
+        return err;
+    }
+
+    g_AHLCtx.policyCtx.postActionEvent = afb_daemon_make_event(AHL_POST_ACTION_EVENT);
+    err = !afb_event_is_valid(g_AHLCtx.policyCtx.postActionEvent);
+    if (err) {
+        AFB_ERROR("Could not create post action event call event");
+        return err;
+    }
+
+    return err;
+}
+
+static void AhlBindingTerm()
+{
+#ifndef AHL_DISCONNECT_POLICY    
+    // Policy termination
+    Policy_Term();
+#endif
+
+    // Roles
+    if (g_AHLCtx.policyCtx.pRoleInfo != NULL) {
+        GHashTableIter iter;
+        gpointer key, value;
+        g_hash_table_iter_init(&iter, g_AHLCtx.policyCtx.pRoleInfo);
+        while (g_hash_table_iter_next (&iter, &key, &value))
+        {
+            RoleInfoT * pRole = (RoleInfoT *)value;
+            if (pRole)
+            {
+                if(pRole->pRoleName) {
+                    g_free(pRole->pRoleName);
+                    pRole->pRoleName = NULL;
+                }
+                // Actions
+                if (pRole->pActionList) {
+                    for (int i = 0; i < pRole->pActionList->len; i++)
+                    {
+                        g_ptr_array_remove_index( pRole->pActionList, i ); // Free char * is called by GLib
+                    }
+                }
+                // Source endpoints
+                if (pRole->pSourceEndpoints) {
+                    for (int i = 0; i < pRole->pSourceEndpoints->len; i++)
+                    {
+                        EndpointInfoT * pEndpoint = g_ptr_array_remove_index( pRole->pSourceEndpoints, i );  // Free endpoint * is called by GLib
+                        if (pEndpoint) {
+                            TermEndpointInfo(pEndpoint);
+                        }
+                    }
+                }
+                // Sink endpoints
+                if (pRole->pSinkEndpoints) {
+                    for (int i = 0; i < pRole->pSinkEndpoints->len; i++)
+                    {
+                        EndpointInfoT * pEndpoint = g_ptr_array_remove_index( pRole->pSinkEndpoints, i ); // Free endpoint * is called by GLib
+                        if (pEndpoint) {
+                            TermEndpointInfo(pEndpoint);
+                        }
+                    }
+                }
+                free(pRole);
             }
         }
+        g_hash_table_remove_all(g_AHLCtx.policyCtx.pRoleInfo);
+        g_hash_table_destroy(g_AHLCtx.policyCtx.pRoleInfo);
+        g_AHLCtx.policyCtx.pRoleInfo = NULL;
     }
-    return pEndpointInfo;
+   
+   if (g_AHLCtx.policyCtx.pStreams) {
+        GHashTableIter iter;
+        gpointer key, value;
+        g_hash_table_iter_init (&iter, g_AHLCtx.policyCtx.pStreams);
+        while (g_hash_table_iter_next (&iter, &key, &value))
+        {
+            if (value)
+                free(value);
+        } 
+        g_hash_table_remove_all(g_AHLCtx.policyCtx.pStreams);
+        g_hash_table_destroy(g_AHLCtx.policyCtx.pStreams);
+        g_AHLCtx.policyCtx.pStreams = NULL;
+   }
+
+    if (g_AHLCtx.policyCtx.pHALList) {
+        g_ptr_array_free(g_AHLCtx.policyCtx.pHALList,TRUE);
+        g_AHLCtx.policyCtx.pHALList = NULL;
+    }
+
+    AFB_INFO("Audio high-level binding termination success");
 }
 
 // Binding initialization
 PUBLIC int AhlBindingInit()
 {
-    int errcount = 0;
     int err = 0;
 
-    // This API uses services from low level audio
-    err = afb_daemon_require_api_v2("alsacore",1) ;
-    if( err != 0 )
+    memset(&g_AHLCtx,0,sizeof(g_AHLCtx));
+    
+    // Register exit function
+    atexit(AhlBindingTerm);
+
+    //Create AGL Events
+    err=CreateEvents();
+    if(err)
     {
-        AFB_ERROR("Audio high level API requires alsacore API to be available");
-        return 1;
+        //Error messages already reported inside CreateEvents
+        return err;
     }
 
     // Parse high-level binding JSON configuration file (will build device lists)
-    errcount += ParseHLBConfig();
+    err = ParseHLBConfig();
+    if(err)
+    {
+        //Error messages already reported inside ParseHLBConfig
+        return err;
+    }
+    
+#ifndef AHL_DISCONNECT_POLICY  
+    // Policy initialization
+    err = Policy_Init();
+    if(err == AHL_POLICY_REJECT)
+    {
+        //Error messages already reported inside PolicyInit
+        return err;        
+    }
 
-    // Initialize list of active streams
-    g_AHLCtx.policyCtx.pActiveStreams = g_array_new(FALSE,TRUE,sizeof(StreamInfoT));
+    // for all audio Roles
+    GHashTableIter iter;
+    gpointer key, value;
+
+    g_hash_table_iter_init (&iter, g_AHLCtx.policyCtx.pRoleInfo);
+    while (g_hash_table_iter_next (&iter, &key, &value))
+    {
+        RoleInfoT * pRoleInfo = (RoleInfoT*)value;
+        if (pRoleInfo->pSourceEndpoints){
+            // for all source endpoints
+            for (int j = 0; j < pRoleInfo->pSourceEndpoints->len; j++) {
+                EndpointInfoT * pCurEndpointInfo = g_ptr_array_index(pRoleInfo->pSourceEndpoints,j);
+                g_assert_nonnull(pCurEndpointInfo);
+                json_object *pPolicyEndpointJ = NULL;
+                err = PolicyEndpointStructToJSON(pCurEndpointInfo, &pPolicyEndpointJ);
+                if (err == AHL_POLICY_UTIL_FAIL)
+                {
+                    AFB_ERROR("Unable to Create Endpoint Json object error:%s ",wrap_json_get_error_string(err));
+                    return err;    
+                }
+                else
+                {
+                    err = Policy_Endpoint_Init(pPolicyEndpointJ);
+                    if (err == AHL_POLICY_REJECT) {
+                        AFB_ERROR("Policy endpoint properties initalization failed for endpoint_id :%d type:%d",pCurEndpointInfo->endpointID, pCurEndpointInfo->type);
+                    }                    
+                    //free pPolicyEndpointJ
+                    json_object_put(pPolicyEndpointJ);
+                }                                 
+            }
+        }
+        if (pRoleInfo->pSinkEndpoints){
+            // for all sink endpoints
+            for (int j = 0; j < pRoleInfo->pSinkEndpoints->len; j++) {
+                EndpointInfoT * pCurEndpointInfo = g_ptr_array_index(pRoleInfo->pSinkEndpoints,j);
+                g_assert_nonnull(pCurEndpointInfo);
+                json_object *pPolicyEndpointJ = NULL;
+                err = PolicyEndpointStructToJSON(pCurEndpointInfo, &pPolicyEndpointJ);
+                if (err == AHL_POLICY_UTIL_FAIL)
+                {
+                    AFB_ERROR("Unable to Create Endpoint Json object error:%s ",wrap_json_get_error_string(err));
+                    return err;
+                }
+                else
+                {
+                    err = Policy_Endpoint_Init(pPolicyEndpointJ);
+                    if (err== AHL_POLICY_REJECT) {
+                        AFB_ERROR("Policy endpoint properties initalization failed for endpoint_id :%d type:%d",pCurEndpointInfo->endpointID, pCurEndpointInfo->type);                        
+                    }
+                    //free pPolicyEndpointJ
+                    json_object_put(pPolicyEndpointJ);
+                } 
 
-    // TODO: Register for device changes ALSA low level audio service
+            }
+        }
+    }    
+#endif   
 
-    // TODO: Perform other binding initialization tasks (e.g. broadcast service ready event?)
+    // Initialize list of active streams
+    g_AHLCtx.policyCtx.pStreams = g_hash_table_new(g_int_hash, g_int_equal);
+    if(g_AHLCtx.policyCtx.pStreams == NULL)
+    {
+        AFB_ERROR("Unable to create Active Stream List");
+        return err;
+    }
 
-    // TODO: Use AGL persistence framework to retrieve and set inital state/volumes/properties
+    // TODO: Use AGL persistence framework to retrieve and set initial volumes/properties
 
-    AFB_DEBUG("Audio high-level Binding success errcount=%d", errcount);
-    return errcount;
+    AFB_DEBUG("Audio high-level Binding success");
+    return err;
 }
 
-// TODO: AhlBindingTerm()?
-// // TODO: Use AGL persistence framework to retrieve and set inital state/volumes
+PUBLIC void AhlOnEvent(const char *evtname, json_object *eventJ)
+{
+    AFB_DEBUG("AHL received event %s", evtname);
 
-// TODO: OnEventFunction
-// if ALSA device availability change -> update source / sink list
-// Call policy to attempt to assign role based on information (e.g. device name)
-// Policy should also determine priority (insert device in right spot in the list)
+    // TODO: Handle event from the policy to update internal information (currently not possible since within the same binding)
+    
+#ifndef AHL_DISCONNECT_POLICY  
+    // Temp: currently forward to policy to handle events  (they will be received directly when disconnected into separate binding)
+    Policy_OnEvent(evtname, eventJ);
+#endif
+}
 
 PUBLIC void audiohlapi_get_sources(struct afb_req req)
 {
-    json_object *sourcesJ = NULL;
-    json_object *sourceJ = NULL;
+    json_object *devicesJ = NULL;
+    json_object *deviceJ = NULL;
     json_object *queryJ = NULL;
     char * audioRole = NULL;
-   
+
     queryJ = afb_req_json(req);
     int err = wrap_json_unpack(queryJ, "{s:s}", "audio_role", &audioRole);
     if (err) {
@@ -156,40 +564,41 @@ PUBLIC void audiohlapi_get_sources(struct afb_req req)
         return;
     }
 
-    sourcesJ = json_object_new_array();
-
     AFB_DEBUG("Filtering devices according to specified audio role=%s", audioRole);
-    // Check that the role requested exists in current configuration
-    int roleIndex = FindRoleIndex(audioRole);
-    if ( roleIndex == -1)
+
+    RoleInfoT * pRole = GetRole(audioRole);
+    if ( pRole == NULL )
     {
         afb_req_fail_f(req, "Invalid arguments", "Requested audio role does not exist in current configuration -> %s", json_object_get_string(queryJ));
         return;
     }
-    // List device only for current audio role and device type (pick the role device list)
-    int iRoleIndex = FindRoleIndex(audioRole);
-    if (iRoleIndex >= 0)
+    else
     {
-        GArray * pRoleSourceDeviceArray = g_ptr_array_index( g_AHLCtx.policyCtx.pSourceEndpoints, iRoleIndex );
-        int iNumberDevices = pRoleSourceDeviceArray->len;
-        for ( int j = 0 ; j < iNumberDevices; j++)
-        {
-            EndpointInfoT sourceInfo = g_array_index(pRoleSourceDeviceArray,EndpointInfoT,j);
-            EndpointInfoStructToJSON(sourceJ, sourceInfo);
-            json_object_array_add(sourcesJ, sourceJ);
+        devicesJ = json_object_new_array();
+        GPtrArray * pDeviceArray = pRole->pSourceEndpoints;
+        if (pDeviceArray) {
+            int iNumberDevices = pDeviceArray->len;
+            for ( int j = 0 ; j < iNumberDevices; j++)
+            {
+                EndpointInfoT * pEndpointInfo = g_ptr_array_index(pDeviceArray,j);
+                if (pEndpointInfo) {
+                    EndpointInfoStructToJSON(&deviceJ, pEndpointInfo);
+                    json_object_array_add(devicesJ, deviceJ);
+                }
+            }
         }
     } 
 
-    afb_req_success(req, sourcesJ, "List of sources");
+    afb_req_success(req, devicesJ, "List of sources");
 }
 
 PUBLIC void audiohlapi_get_sinks(struct afb_req req)
 {
-    json_object *sinksJ = NULL;
-    json_object *sinkJ = NULL;
+    json_object *devicesJ = NULL;
+    json_object *deviceJ = NULL;
     json_object *queryJ = NULL;
     char * audioRole = NULL;
-    
+
     queryJ = afb_req_json(req);
     int err = wrap_json_unpack(queryJ, "{s:s}", "audio_role", &audioRole);
     if (err) {
@@ -197,109 +606,163 @@ PUBLIC void audiohlapi_get_sinks(struct afb_req req)
         return;
     }
 
-    sinksJ = json_object_new_array();
-
     AFB_DEBUG("Filtering devices according to specified audio role=%s", audioRole);
-    // Check that the role requested exists in current configuration
-    int roleIndex = FindRoleIndex(audioRole);
-    if ( roleIndex == -1)
+
+    RoleInfoT * pRole = GetRole(audioRole);
+    if ( pRole == NULL )
     {
         afb_req_fail_f(req, "Invalid arguments", "Requested audio role does not exist in current configuration -> %s", json_object_get_string(queryJ));
         return;
     }
-    // List device only for current audio role and device type (pick the role device list)
-    int iRoleIndex = FindRoleIndex(audioRole);
-    if (iRoleIndex >= 0)
+    else
     {
-        GArray * pRoleSinkDeviceArray = g_ptr_array_index( g_AHLCtx.policyCtx.pSinkEndpoints, iRoleIndex );
-        int iNumberDevices = pRoleSinkDeviceArray->len;
-        for ( int j = 0 ; j < iNumberDevices; j++)
-        {
-            EndpointInfoT sinkInfo = g_array_index(pRoleSinkDeviceArray,EndpointInfoT,j);
-            EndpointInfoStructToJSON(sinkJ, sinkInfo);
-            json_object_array_add(sinksJ, sinkJ);
+        devicesJ = json_object_new_array();
+        GPtrArray * pDeviceArray = pRole->pSinkEndpoints;
+        if (pDeviceArray) {
+            int iNumberDevices = pDeviceArray->len;
+            for ( int j = 0 ; j < iNumberDevices; j++)
+            {
+                EndpointInfoT * pEndpointInfo = g_ptr_array_index(pDeviceArray,j);
+                EndpointInfoStructToJSON(&deviceJ, pEndpointInfo);
+                json_object_array_add(devicesJ, deviceJ);
+            }
         }
     } 
 
-    afb_req_success(req, sinksJ, "List of sinks");
+    afb_req_success(req, devicesJ, "List of sinks");
 }
 
 PUBLIC void audiohlapi_stream_open(struct afb_req req)
 {
     json_object *streamInfoJ = NULL;
-    StreamInfoT streamInfo;
+    StreamInfoT * pStreamInfo = NULL;
     json_object *queryJ = NULL;
     char * audioRole = NULL;
-    EndpointTypeT endpointType;
-    endpointID_t endpointID = UNDEFINED_ID;
-    int policyAllowed = 0;
-    EndpointInfoT endpointInfo;
+    char * endpointTypeStr = NULL;
+    EndpointTypeT endpointType = ENDPOINTTYPE_MAXVALUE;
+    endpointID_t endpointID = AHL_UNDEFINED;
+    EndpointInfoT * pEndpointInfo = NULL;
+    EndpointSelectionModeT endpointSelMode = ENDPOINTSELMODEMAXVALUE;
     
     queryJ = afb_req_json(req);
-    int err = wrap_json_unpack(queryJ, "{s:s,s:i,s?i}", "audio_role", &audioRole, "endpoint_type", &endpointType, "endpoint_id", &endpointID);
+    int err = wrap_json_unpack(queryJ, "{s:s,s:s,s?i}", "audio_role", &audioRole, "endpoint_type", &endpointTypeStr, "endpoint_id", &endpointID);
     if (err) {
         afb_req_fail_f(req, "Invalid arguments", "Args not a valid json object query=%s", json_object_get_string(queryJ));
         return;
     }
-    AFB_DEBUG("Parsed input arguments = audio_role:%s endpoint_type:%d endpoint_id:%d", audioRole,endpointType,endpointID);
+    AFB_DEBUG("Parsed input arguments = audio_role:%s endpoint_type:%s endpoint_id:%d", audioRole,endpointTypeStr,endpointID);
+    endpointType = EndpointTypeToEnum(endpointTypeStr);
 
-    int iRoleIndex = FindRoleIndex(audioRole);
-    if (iRoleIndex < 0) {
+    // Check if there is already an existing context for this client
+    AHLClientCtxT * pClientCtx = afb_req_context_get(req); // Retrieve client-specific data structure
+    if (pClientCtx == NULL)
+    {
+        pClientCtx = AllocateClientContext();
+        afb_req_context_set(req, pClientCtx, TerminateClientContext);
+    }
+
+    RoleInfoT * pRole = GetRole(audioRole);
+    if ( pRole == NULL )
+    {
         afb_req_fail_f(req, "Invalid audio role", "Audio role was not found in configuration -> %s",audioRole);
         return;
     }
 
-    GArray * pRoleDeviceArray = NULL;
+    GPtrArray * pDeviceArray = NULL;
     if (endpointType == ENDPOINTTYPE_SOURCE){
-        pRoleDeviceArray = g_ptr_array_index( g_AHLCtx.policyCtx.pSourceEndpoints, iRoleIndex );
+        pDeviceArray = pRole->pSourceEndpoints;
     }
     else{
-        pRoleDeviceArray = g_ptr_array_index( g_AHLCtx.policyCtx.pSinkEndpoints, iRoleIndex );
+        pDeviceArray = pRole->pSinkEndpoints;
     }
-    if (pRoleDeviceArray->len == 0) {
-        afb_req_fail_f(req, "No available devices", "No available devices for role:%s and device type:%d",audioRole,endpointType);
+    if (pDeviceArray == NULL || pDeviceArray->len == 0) {
+        afb_req_fail_f(req, "No available devices", "No available devices for role:%s and device type:%s",audioRole,endpointTypeStr);
         return;
     }
 
-    if (endpointID == UNDEFINED_ID)
+    if (endpointID == AHL_UNDEFINED)
     {
         // Assign a device based on configuration priority (first in the list for requested role and endpoint type)
-        endpointInfo = g_array_index(pRoleDeviceArray,EndpointInfoT,0);
+        pEndpointInfo = g_ptr_array_index(pDeviceArray,0);
+        endpointSelMode = ENDPOINTSELMODE_AUTO;
+        
     }
     else{
+        endpointSelMode = ENDPOINTSELMODE_MANUAL;
         // Find specified endpoint ID in list of devices
-        int iNumberDevices = pRoleDeviceArray->len;
-        int iEndpointFound = 0;
+        int iNumberDevices = pDeviceArray->len;
         for ( int j = 0 ; j < iNumberDevices; j++)
         {
-            endpointInfo = g_array_index(pRoleDeviceArray,EndpointInfoT,j);
-            if (endpointInfo.endpointID == endpointID) {
-                iEndpointFound = 1;
+            pEndpointInfo = g_ptr_array_index(pDeviceArray,j);
+            if (pEndpointInfo && pEndpointInfo->endpointID == endpointID) {
                 break;
             }
+            pEndpointInfo = NULL;
         }
-        if (iEndpointFound == 0) {
-            afb_req_fail_f(req, "Endpoint not available", "Specified endpoint not available for role:%s and device type:%d endpoint id %d",audioRole,endpointType,endpointID);
-            return;
-        }
+
     }
 
+    if (pEndpointInfo == NULL) {
+        afb_req_fail_f(req, "Endpoint not available", "Specified endpoint not available for role:%s and device type:%d endpoint id %d",audioRole,endpointType,endpointID);
+        return;
+    }
+
+    pStreamInfo = (StreamInfoT*) malloc(sizeof(StreamInfoT));
+    memset(pStreamInfo,0,sizeof(StreamInfoT));
+
+    // Create stream
+    pStreamInfo->streamID = CreateNewStreamID(); // create new ID
+    pStreamInfo->streamState = STREAM_STATE_IDLE;
+    pStreamInfo->streamMute = STREAM_UNMUTED;
+    pStreamInfo->pEndpointInfo = pEndpointInfo;
+    pStreamInfo->endpointSelMode = endpointSelMode;
+    // Directly from role config for now, but could be programmatically overriden in the future
+    pStreamInfo->pRoleName = pRole->pRoleName;         
+    pStreamInfo->iPriority = pRole->iPriority;   
+    pStreamInfo->eInterruptBehavior = pRole->eInterruptBehavior;
+
+#ifndef AHL_DISCONNECT_POLICY  
     // Call policy to verify whether creating a new audio stream is allowed in current context and possibly take other actions
-    policyAllowed = Policy_OpenStream(audioRole, endpointType, endpointID);
-    if (policyAllowed == AUDIOHL_POLICY_REJECT)
+    json_object *pPolicyStreamJ = NULL;
+    err = PolicyStreamStructToJSON(pStreamInfo, &pPolicyStreamJ);
+    if (err == AHL_POLICY_UTIL_FAIL)
+    {
+        afb_req_fail(req, "Audio policy violation", "Unable to get JSON object for Policy_OpenStream");
+        return;
+    } 
+    
+    int policyAllowed = Policy_OpenStream(pPolicyStreamJ);    
+    if (policyAllowed == AHL_POLICY_REJECT)
     {
         afb_req_fail(req, "Audio policy violation", "Open stream not allowed in current context");
         return;
+    } 
+#endif   
+
+    char streamEventName[128];
+    snprintf(streamEventName,128,"ahl_streamstate_%d",pStreamInfo->streamID);
+    
+    pStreamInfo->streamStateEvent = afb_daemon_make_event(streamEventName);
+    err = !afb_event_is_valid(pStreamInfo->streamStateEvent);
+    if (err) {
+        afb_req_fail(req, "Stream event creation failure", "Could not create stream specific state change event");
+        return;
     }
 
-    // Create stream
-    streamInfo.streamID = CreateNewStreamID(); // create new ID
-    streamInfo.endpointInfo = endpointInfo;
+    err = afb_req_subscribe(req,pStreamInfo->streamStateEvent);
+    if (err) {
+        afb_req_fail(req, "Stream event subscription failure", "Could not subscribe to stream specific state change event");
+        return;
+    }
+
+    // Add to client context stream ID access rights
+    g_array_append_val(pClientCtx->pStreamAccessList, pStreamInfo->streamID);
 
     // Push stream on active stream list
-    g_array_append_val( g_AHLCtx.policyCtx.pActiveStreams, streamInfo );
+    if (g_AHLCtx.policyCtx.pStreams)
+        g_hash_table_insert( g_AHLCtx.policyCtx.pStreams, GINT_TO_POINTER(&pStreamInfo->streamID), pStreamInfo );
 
-    StreamInfoStructToJSON(&streamInfoJ,streamInfo);
+    StreamInfoStructToJSON(&streamInfoJ,pStreamInfo);
 
     afb_req_success(req, streamInfoJ, "Stream info structure");
 }
@@ -307,7 +770,7 @@ PUBLIC void audiohlapi_stream_open(struct afb_req req)
 PUBLIC void audiohlapi_stream_close(struct afb_req req)
 {
     json_object *queryJ = NULL;
-    streamID_t streamID = UNDEFINED_ID;
+    streamID_t streamID = AHL_UNDEFINED;
     
     queryJ = afb_req_json(req);
     int err = wrap_json_unpack(queryJ, "{s:i}", "stream_id", &streamID);
@@ -317,106 +780,252 @@ PUBLIC void audiohlapi_stream_close(struct afb_req req)
     }
     AFB_DEBUG("Parsed input arguments = stream_id:%d", streamID);
 
-    // TODO: Validate that the application ID from which the stream close is coming is the one that opened it, otherwise fail and do nothing
+    
+    StreamInfoT * pStreamInfo = GetStream(streamID);
+    if (pStreamInfo == NULL) {
+        afb_req_fail_f(req, "Stream not found", "Specified stream not currently active stream_id -> %d",streamID);
+        return;
+    }
 
-    // Remove from active stream list (if present)
-    int iNumActiveStreams = g_AHLCtx.policyCtx.pActiveStreams->len;
-    int iStreamFound = 0;
-    for ( int i = 0; i < iNumActiveStreams ; i++ ) {
-        StreamInfoT streamInfo = g_array_index(g_AHLCtx.policyCtx.pActiveStreams,StreamInfoT,i);
-        if (streamInfo.streamID == streamID){
-            g_array_remove_index(g_AHLCtx.policyCtx.pActiveStreams,i);
-            iStreamFound = 1;
-            break;
-        }
+    // Check if there is already an existing context for this client
+    AHLClientCtxT * pClientCtx = afb_req_context_get(req); // Retrieve client-specific data structure
+    if (pClientCtx == NULL)
+    {
+        afb_req_fail(req, "Bad state", "No client context associated with the request (is there an opened stream by this client?)");
+        return;
     }
 
-    if (iStreamFound == 0) {
-        afb_req_fail_f(req, "Stream not found", "Specified stream not currently active stream_id -> %d",streamID);
+    // Verify that this client can control the stream
+    int iStreamAccessControl = CheckStreamAccessControl( pClientCtx, streamID );
+    if (iStreamAccessControl == AHL_ACCESS_CONTROL_DENIED)
+    {
+        afb_req_fail(req, "Access control denied", "Close stream not allowed in current client context");
         return;
     }
 
+#ifndef AHL_DISCONNECT_POLICY  
+    json_object *pPolicyStreamJ = NULL;
+    err = PolicyStreamStructToJSON(pStreamInfo, &pPolicyStreamJ);
+    if (err == AHL_POLICY_UTIL_FAIL)
+    {
+        afb_req_fail(req, "Audio policy violation", "Unable to get JSON object for Policy_CloseStream");
+        return;
+    } 
+    // Call policy to verify whether creating a new audio stream is allowed in current context and possibly take other actions
+    int policyAllowed = Policy_CloseStream(pPolicyStreamJ);
+    if (policyAllowed == AHL_POLICY_REJECT)
+    {
+        afb_req_fail(req, "Audio policy violation", "Close stream not allowed in current context");
+        return;
+    }
+#endif
+
+    // Unsubscribe client from stream events
+    char streamEventName[128];
+    snprintf(streamEventName,128,"ahl_streamstate_%d",streamID);
+    int iValid = afb_event_is_valid(pStreamInfo->streamStateEvent);
+    if (iValid) {
+        err = afb_req_unsubscribe(req,pStreamInfo->streamStateEvent);
+        if (err) {
+            afb_req_fail(req, "Stream event subscription failure", "Could not unsubscribe to stream specific state change event");
+            return;
+        }
+    }
+
+    // Remove from stream list (if present)
+    if (g_AHLCtx.policyCtx.pStreams)
+        g_hash_table_remove(g_AHLCtx.policyCtx.pStreams,GINT_TO_POINTER(&pStreamInfo->streamID));
+    free(pStreamInfo);
+    pStreamInfo = NULL;
+
+    // Find index for cases where there are multiple streams per client
+    // Remove from client context stream ID and endpoint ID access rights
+    if (pClientCtx->pStreamAccessList) {
+        for (int i = 0; i < pClientCtx->pStreamAccessList->len ; i++) {
+            streamID_t iID = g_array_index(pClientCtx->pStreamAccessList,streamID_t,i);
+            if (iID == streamID) {
+                g_array_remove_index(pClientCtx->pStreamAccessList, i);
+            }    
+        }
+
+        if (pClientCtx->pStreamAccessList->len == 0) {
+            // If no more streams/endpoints owner, clear session
+            afb_req_context_clear(req);
+        }
+    }
+
     afb_req_success(req, NULL, "Stream close completed");
 }
 
-// Endpoints
-PUBLIC void audiohlapi_set_volume(struct afb_req req)
-{
+ PUBLIC void audiohlapi_set_stream_state(struct afb_req req)
+ {
     json_object *queryJ = NULL;
-    endpointID_t endpointID = UNDEFINED_ID;
-    EndpointTypeT endpointType = ENDPOINTTYPE_MAXVALUE;
-    char * volumeStr = NULL;
-    int rampTimeMS = 0;
-    int policyAllowed = 0;
+    streamID_t streamID = AHL_UNDEFINED;
+    char * streamStateStr = NULL;
     
     queryJ = afb_req_json(req);
-    int err = wrap_json_unpack(queryJ, "{s:i,s:i,s:s,s?i}", "endpoint_type", &endpointType,"endpoint_id",&endpointID,"volume",&volumeStr,"ramp_time_ms",&rampTimeMS);
+    int err = wrap_json_unpack(queryJ, "{s:i,s:s}", "stream_id", &streamID,"state",&streamStateStr);
     if (err) {
         afb_req_fail_f(req, "Invalid arguments", "Args not a valid json object query=%s", json_object_get_string(queryJ));
         return;
     }
-    AFB_DEBUG("Parsed input arguments = endpoint_type:%d endpoint_id:%d volume:%s ramp_time_ms: %d", endpointType,endpointID,volumeStr,rampTimeMS);
-   
-    // TODO: Parse volume string to support increment/absolute/percent notation
-    int vol = atoi(volumeStr);
+    AFB_DEBUG("Parsed input arguments = stream_id:%d, state:%s", streamID,streamStateStr);
+    
+    StreamInfoT * pStreamInfo = GetStream(streamID);
+    if (pStreamInfo == NULL) {
+        afb_req_fail_f(req, "Stream not found", "Specified stream not found stream_id -> %d",streamID);
+        return;
+    }
 
-    policyAllowed = Policy_SetVolume(endpointType, endpointID, volumeStr, rampTimeMS); // TODO: Potentially retrieve modified value by policy (e.g. volume limit)
-    if (!policyAllowed)
+    // Check if there is already an existing context for this client
+    AHLClientCtxT * pClientCtx = afb_req_context_get(req); // Retrieve client-specific data structure
+    if (pClientCtx == NULL)
     {
-        afb_req_fail(req, "Audio policy violation", "Set volume not allowed in current context");
+        afb_req_fail(req, "Bad state", "No client context associated with the request (is there an opened stream by this client?)");
         return;
     }
 
-     // TODO: Cache during device enumeration for efficiency
-    EndpointInfoT * pEndpointInfo = GetEndpointInfo(endpointID,endpointType);
-    if (pEndpointInfo == NULL)
+    // Verify that this client can control the stream
+    int iStreamAccessControl = CheckStreamAccessControl( pClientCtx, streamID );
+    if (iStreamAccessControl == AHL_ACCESS_CONTROL_DENIED)
     {
-        afb_req_fail_f(req, "Endpoint not found", "Endpoint information not found for id:%d type%d",endpointID,endpointType);
+        afb_req_fail(req, "Access control denied", "Set stream state not allowed in current client context");
         return;
     }
 
-    // Using audio role available from endpoint to target the right HAL control (build string based on convention)
-    char halControlName[AUDIOHL_MAXHALCONTROLNAME_LENGTH];
-    strncpy(halControlName,pEndpointInfo->audioRole,AUDIOHL_MAXHALCONTROLNAME_LENGTH);
-    strcat(halControlName,"_Ramp"); // Or _Vol for direct control (no ramping)
+    StreamStateT streamState = StreamStateToEnum(streamStateStr);
+#ifndef AHL_DISCONNECT_POLICY  
+    json_object *pPolicyStreamJ = NULL;
+    err = PolicyStreamStructToJSON(pStreamInfo, &pPolicyStreamJ);
+    if (err == AHL_POLICY_UTIL_FAIL)
+    {
+        afb_req_fail(req, "Audio policy violation", "Unable to get JSON object for Policy_SetStreamState");
+        return;
+    } 
 
-    // Set endpoint volume using HAL services (leveraging ramps etc.)
-    json_object *j_response, *j_query = NULL;
- 
-    // Package query
-    err = wrap_json_pack(&j_query,"{s:s,s:i}","label",halControlName, "val",vol);
+    json_object *paramJ= json_object_new_int(streamState);
+    json_object_object_add(pPolicyStreamJ, "arg_stream_state", paramJ);
+
+    int policyAllowed = Policy_SetStreamState(pPolicyStreamJ);    
+    if (policyAllowed == AHL_POLICY_REJECT)
+    {
+        afb_req_fail(req, "Audio policy violation", "Change stream state not allowed in current context");
+        return; 
+    }
+#else
+    // Simulate that policy returns target state (accepted)
+    pStreamInfo->streamState = streamState;
+#endif
+
+    afb_req_success(req, NULL, "Set stream state");
+ }
+
+ PUBLIC void audiohlapi_set_stream_mute(struct afb_req req)
+ {
+    json_object *queryJ = NULL;
+    streamID_t streamID = AHL_UNDEFINED;
+    char * pMuteStr = NULL;
+    
+    queryJ = afb_req_json(req);
+    int err = wrap_json_unpack(queryJ, "{s:i,s:s}", "stream_id", &streamID,"mute",&pMuteStr);
     if (err) {
-        afb_req_fail_f(req, "Invalid query for HAL ctlset", "Invalid query for HAL ctlset: %s",json_object_to_json_string(j_query));
+        afb_req_fail_f(req, "Invalid arguments", "Args not a valid json object query=%s", json_object_get_string(queryJ));
+        return;
+    }
+    AFB_DEBUG("Parsed input arguments = stream_id:%d, mute:%s", streamID,pMuteStr);
+
+    StreamInfoT * pStreamInfo = GetStream(streamID);
+    if (pStreamInfo == NULL) {
+        afb_req_fail_f(req, "Stream not found", "Specified stream not currently active stream_id -> %d",streamID);
+        return;
+    }
+
+    // Check if there is already an existing context for this client
+    AHLClientCtxT * pClientCtx = afb_req_context_get(req); // Retrieve client-specific data structure
+    if (pClientCtx == NULL)
+    {
+        afb_req_fail(req, "Bad state", "No client context associated with the request (is there an opened stream by this client?)");
+        return;
+    }
+
+    // Verify that this client can control the stream
+    int iStreamAccessControl = CheckStreamAccessControl( pClientCtx, streamID );
+    if (iStreamAccessControl == AHL_ACCESS_CONTROL_DENIED)
+    {
+        afb_req_fail(req, "Access control denied", "Set stream mute state not allowed in current client context");
+        return;
+    }
+
+
+    StreamMuteT muteState = StreamMuteToEnum(pMuteStr);
+#ifndef AHL_DISCONNECT_POLICY 
+    json_object *pPolicyStreamJ = NULL;
+    err = PolicyStreamStructToJSON(pStreamInfo, &pPolicyStreamJ);
+    if (err == AHL_POLICY_UTIL_FAIL)
+    {
+        afb_req_fail(req, "Audio policy violation", "Unable to get JSON object for Policy_SetStreamMute");
+        return;
+    } 
+
+    json_object *paramJ= json_object_new_int(muteState);
+    json_object_object_add(pPolicyStreamJ, "mute_state", paramJ);
+
+    int policyAllowed = Policy_SetStreamMute(pPolicyStreamJ);    
+    if (policyAllowed == AHL_POLICY_REJECT)
+    {
+        afb_req_fail(req, "Audio policy violation", "Mute stream not allowed in current context");
         return;
     }
+#else
+    // Simulate that policy returns target state (accepted)
+    pStreamInfo->streamMute = muteState;
+#endif
+
+    afb_req_success(req, NULL, "Set stream mute completed");
+ }
 
-    // Set the volume using the HAL
-    err = afb_service_call_sync(pEndpointInfo->halAPIName, "ctlset", j_query, &j_response);
+ PUBLIC void audiohlapi_get_stream_info(struct afb_req req)
+ {
+    json_object *queryJ = NULL;
+    streamID_t streamID = AHL_UNDEFINED;
+    json_object * streamInfoJ = NULL;
+    
+    queryJ = afb_req_json(req);
+    int err = wrap_json_unpack(queryJ, "{s:i}", "stream_id", &streamID);
     if (err) {
-        afb_req_fail_f(req, "HAL ctlset failure", "Could not ctlset on HAL: %s",pEndpointInfo->halAPIName);
+        afb_req_fail_f(req, "Invalid arguments", "Args not a valid json object query=%s", json_object_get_string(queryJ));
         return;
     }
-    AFB_DEBUG("HAL ctlset response=%s", json_object_to_json_string(j_response));
- 
-    afb_req_success(req, NULL, "Set volume completed");
-}
+    AFB_DEBUG("Parsed input arguments = stream_id:%d", streamID);
 
-PUBLIC void audiohlapi_get_volume(struct afb_req req)
+    StreamInfoT * pStreamInfo = GetStream(streamID);
+    if (pStreamInfo == NULL) {
+        afb_req_fail_f(req, "Stream not found", "Specified stream not currently active stream_id -> %d",streamID);
+        return;
+    }
+
+    StreamInfoStructToJSON(&streamInfoJ,pStreamInfo);
+
+    afb_req_success(req, streamInfoJ, "Get stream info completed");
+ }
+
+PUBLIC void audiohlapi_set_volume(struct afb_req req)
 {
     json_object *queryJ = NULL;
-    endpointID_t endpointID = UNDEFINED_ID;
+    endpointID_t endpointID = AHL_UNDEFINED;
+    char * pEndpointTypeStr = NULL;
     EndpointTypeT endpointType = ENDPOINTTYPE_MAXVALUE;
-    json_object *volumeJ;
+    char * volumeStr = NULL;
     
     queryJ = afb_req_json(req);
-    int err = wrap_json_unpack(queryJ, "{s:i,s:i}", "endpoint_type", &endpointType,"endpoint_id",&endpointID);
+    int err = wrap_json_unpack(queryJ, "{s:s,s:i,s:s}", "endpoint_type", &pEndpointTypeStr,"endpoint_id",&endpointID,"volume",&volumeStr);
     if (err) {
         afb_req_fail_f(req, "Invalid arguments", "Args not a valid json object query=%s", json_object_get_string(queryJ));
         return;
     }
-    AFB_DEBUG("Parsed input arguments = endpoint_type:%d endpoint_id:%d", endpointType,endpointID);
+    AFB_DEBUG("Parsed input arguments = endpoint_type:%s endpoint_id:%d volume:%s", pEndpointTypeStr,endpointID,volumeStr);
+    endpointType = EndpointTypeToEnum(pEndpointTypeStr);
 
-    // TODO: Cache during device enumeration for efficiency
     EndpointInfoT * pEndpointInfo = GetEndpointInfo(endpointID,endpointType);
     if (pEndpointInfo == NULL)
     {
@@ -424,221 +1033,545 @@ PUBLIC void audiohlapi_get_volume(struct afb_req req)
         return;
     }
 
-    // Using audio role available from endpoint to target the right HAL control (build string based on convention)
-    char halControlName[AUDIOHL_MAXHALCONTROLNAME_LENGTH];
-    strncpy(halControlName,pEndpointInfo->audioRole,AUDIOHL_MAXHALCONTROLNAME_LENGTH);
-    strcat(halControlName,"_Vol"); // Use current value, not ramp target
+#ifndef AHL_DISCONNECT_POLICY
+    json_object *pPolicyEndpointJ = NULL;
+    err = PolicyEndpointStructToJSON(pEndpointInfo, &pPolicyEndpointJ);
+    if (err == AHL_POLICY_UTIL_FAIL)
+    {
+        afb_req_fail(req, "Audio policy violation", "Unable to get JSON object for Policy_SetVolume");
+        return;
+    } 
 
-    // Set endpoint volume using HAL services (leveraging ramps etc.)
-    json_object *j_response, *j_query = NULL;
- 
-    // Package query
-    err = wrap_json_pack(&j_query,"{s:s}","label",halControlName);
-    if (err) {
-        afb_req_fail_f(req, "Invalid query for HAL ctlget", "Invalid query for HAL ctlget: %s",json_object_to_json_string(j_query));
+    json_object *paramJ= json_object_new_string(volumeStr);
+    json_object_object_add(pPolicyEndpointJ, "arg_volume", paramJ);
+
+    int policyAllowed = Policy_SetVolume(pPolicyEndpointJ);
+    if (!policyAllowed)
+    {
+        afb_req_fail(req, "Audio policy violation", "Set volume not allowed in current context");
         return;
     }
+#else
+    // Simulate that policy returns target state (accepted)
+    pEndpointInfo->iVolume = atoi(volumeStr);
+#endif
+ 
+    afb_req_success(req, NULL, "Set volume completed");
+}
 
-    // Set the volume using the HAL
-    err = afb_service_call_sync(pEndpointInfo->halAPIName, "ctlget", j_query, &j_response);
+PUBLIC void audiohlapi_get_volume(struct afb_req req)
+{
+    json_object *queryJ = NULL;
+    endpointID_t endpointID = AHL_UNDEFINED;
+    char * pEndpointTypeStr = NULL;
+    EndpointTypeT endpointType = ENDPOINTTYPE_MAXVALUE;
+    json_object * volumeJ = NULL;
+    
+    queryJ = afb_req_json(req);
+    int err = wrap_json_unpack(queryJ, "{s:s,s:i}", "endpoint_type", &pEndpointTypeStr,"endpoint_id",&endpointID);
     if (err) {
-        afb_req_fail_f(req, "HAL ctlget failure", "Could not ctlget on HAL: %s",pEndpointInfo->halAPIName);
+        afb_req_fail_f(req, "Invalid arguments", "Args not a valid json object query=%s", json_object_get_string(queryJ));
         return;
     }
-    AFB_INFO("HAL ctlget response=%s", json_object_to_json_string(j_response));
+    AFB_DEBUG("Parsed input arguments = endpoint_type:%s endpoint_id:%d", pEndpointTypeStr,endpointID);
+    endpointType = EndpointTypeToEnum(pEndpointTypeStr);
 
-    // Parse response
-    json_object * jRespObj = NULL;
-    json_object_object_get_ex(j_response, "response", &jRespObj);
-    json_object * jVal = NULL;
-    json_object_object_get_ex(jRespObj, "val", &jVal);
-    int val1 = 0, val2 = 0; // Why 2 values?      
-    err = wrap_json_unpack(jVal, "[ii]", &val1, &val2);
-    if (err) {
-        afb_req_fail_f(req,"Volume retrieve failed", "Could not retrieve volume value -> %s", json_object_get_string(jVal));
+    EndpointInfoT * pEndpointInfo = GetEndpointInfo(endpointID,endpointType);
+    if (pEndpointInfo == NULL)
+    {
+        afb_req_fail_f(req, "Endpoint not found", "Endpoint information not found for id:%d type%d",endpointID,endpointType);
         return;
     }
 
-    volumeJ = json_object_new_double((double)val1);
+    volumeJ = json_object_new_int(pEndpointInfo->iVolume);
 
     afb_req_success(req, volumeJ, "Retrieved volume value");
 }
 
-PUBLIC void audiohlapi_set_property(struct afb_req req)
+// Properties 
+PUBLIC void audiohlapi_get_endpoint_info(struct afb_req req)
 {
     json_object *queryJ = NULL;
-    endpointID_t endpointID = UNDEFINED_ID;
+    endpointID_t endpointID = AHL_UNDEFINED;
+    char * pEndpointTypeStr = NULL;
     EndpointTypeT endpointType = ENDPOINTTYPE_MAXVALUE;
-    char * propertyName = NULL;
-    char * propValueStr = NULL;
-    int rampTimeMS = 0;
-    int policyAllowed = 0;
     
     queryJ = afb_req_json(req);
-    int err = wrap_json_unpack(queryJ, "{s:i,s:i,s:s,s:s,s?i}", "endpoint_type", &endpointType,"endpoint_id",&endpointID,"property_name",&propertyName,"value",&propValueStr,"ramp_time_ms",&rampTimeMS);
+    int err = wrap_json_unpack(queryJ, "{s:s,s:i}", "endpoint_type", &pEndpointTypeStr,"endpoint_id",&endpointID);
     if (err) {
         afb_req_fail_f(req, "Invalid arguments", "Args not a valid json object query=%s", json_object_get_string(queryJ));
         return;
     }
-    AFB_DEBUG("Parsed input arguments = endpoint_type:%d endpoint_id:%d property_name:%s value:%s ramp_time_ms:%d", endpointType,endpointID,propertyName,propValueStr,rampTimeMS);
-  
-    // TODO: Parse property value string to support increment/absolute/percent notation
+    AFB_DEBUG("Parsed input arguments = endpoint_type:%s endpoint_id:%d", pEndpointTypeStr,endpointID);
+    endpointType = EndpointTypeToEnum(pEndpointTypeStr);
 
-    // Call policy to allow custom policy actions in current context
-    policyAllowed = Policy_SetProperty(endpointType, endpointID, propertyName, propValueStr, rampTimeMS); // TODO: Potentially retrieve modified value by policy (e.g. parameter limit) 
-    if (!policyAllowed)
+    EndpointInfoT * pEndpointInfo = GetEndpointInfo(endpointID,endpointType);
+    if (pEndpointInfo == NULL)
     {
-        afb_req_fail(req, "Audio policy violation", "Set endpoint property not allowed in current context");
+        afb_req_fail_f(req, "Endpoint not found", "Endpoint information not found for id:%d type%d",endpointID,endpointType);
         return;
     }
 
-    // TODO: Set endpoint property (dispatch on right service target) 
-    // Property targets (Internal,Wwise,Fiberdyne) (e.g. Wwise.ParamX, Fiberdyne.ParamY, Internal.ParamZ)
-    // Cache value in property list
-    // TBD
+    json_object *endpointInfoJ = NULL;
+    EndpointInfoStructToJSON(&endpointInfoJ,pEndpointInfo);
 
-    afb_req_success(req, NULL, "Set property completed");
+    afb_req_success(req, endpointInfoJ, "Retrieved endpoint information and properties");
 }
 
-PUBLIC void audiohlapi_get_property(struct afb_req req)
+PUBLIC void audiohlapi_set_property(struct afb_req req)
 {
     json_object *queryJ = NULL;
-    endpointID_t endpointID = UNDEFINED_ID;
+    endpointID_t endpointID = AHL_UNDEFINED;
+    char * pEndpointTypeStr = NULL;
     EndpointTypeT endpointType = ENDPOINTTYPE_MAXVALUE;
     char * propertyName = NULL;
-    json_object *propertyValJ;
-    double value = 0.0;
+    json_object * propValueJ = NULL;
     
     queryJ = afb_req_json(req);
-    int err = wrap_json_unpack(queryJ, "{s:i,s?i,s:s}", "endpoint_type", &endpointType,"endpoint_id",&endpointID,"property_name",&propertyName);
+    int err = wrap_json_unpack(queryJ, "{s:s,s:i,s:s,s:o}", "endpoint_type", &pEndpointTypeStr,"endpoint_id",&endpointID,"property_name",&propertyName,"value",&propValueJ);
     if (err) {
         afb_req_fail_f(req, "Invalid arguments", "Args not a valid json object query=%s", json_object_get_string(queryJ));
         return;
     }
-    AFB_DEBUG("Parsed input arguments = endpoint_type:%d endpoint_id:%d property_name:%s", endpointType,endpointID,propertyName);
+    AFB_DEBUG("Parsed input arguments = endpoint_type:%s endpoint_id:%d property_name:%s", pEndpointTypeStr,endpointID,propertyName);
+    endpointType = EndpointTypeToEnum(pEndpointTypeStr);
 
-    // TODO: Retrieve cached property value
+    EndpointInfoT * pEndpointInfo = GetEndpointInfo(endpointID,endpointType);
+    if (pEndpointInfo == NULL)
+    {
+        afb_req_fail_f(req, "Endpoint not found", "Endpoint information not found for id:%d type%d",endpointID,endpointType);
+        return;
+    }
 
-    value = 93.0; // TODO: Get actual property value 
-    propertyValJ = json_object_new_double(value);
+#ifndef AHL_DISCONNECT_POLICY  
+    json_object *pPolicyEndpointJ = NULL;
+    err = PolicyEndpointStructToJSON(pEndpointInfo, &pPolicyEndpointJ);
+    if (err == AHL_POLICY_UTIL_FAIL)
+    {
+        afb_req_fail(req, "Audio policy violation", "Unable to get JSON object for Policy_SetVolume");
+        return;
+    } 
 
-    afb_req_success(req, propertyValJ, "Retrieved property value");
+    json_object *paramJ= json_object_new_string(propertyName);
+    json_object_object_add(pPolicyEndpointJ, "arg_property_name", paramJ);
+    json_object_object_add(pPolicyEndpointJ, "arg_property_value", propValueJ);
+
+    // Call policy to allow custom policy actions in current context
+    int policyAllowed = Policy_SetProperty(pPolicyEndpointJ);     
+    if (!policyAllowed)
+    {
+        afb_req_fail(req, "Audio policy violation", "Set endpoint property not allowed in current context");
+        return;
+    }
+#else
+    // Simulate that policy returns target state (accepted)
+    if (pEndpointInfo->pPropTable)
+        g_hash_table_insert(pEndpointInfo->pPropTable, propertyName, propValueJ);
+#endif
+
+    //afb_event_push(g_AHLCtx.policyCtx.propertyEvent,queryJ);
+
+    afb_req_success(req, NULL, "Set property completed");
 }
 
-PUBLIC void audiohlapi_set_state(struct afb_req req)
+PUBLIC void audiohlapi_get_property(struct afb_req req)
 {
     json_object *queryJ = NULL;
-    endpointID_t endpointID = UNDEFINED_ID;
+    endpointID_t endpointID = AHL_UNDEFINED;
+    char * pEndpointTypeStr = NULL;
     EndpointTypeT endpointType = ENDPOINTTYPE_MAXVALUE;
-    char * stateName = NULL;
-    char * stateValue = NULL;
-    int policyAllowed = 0;
+    char * propertyName = NULL;
     
     queryJ = afb_req_json(req);
-    int err = wrap_json_unpack(queryJ, "{s:i,s:i,s:s,s:s}", "endpoint_type", &endpointType,"endpoint_id",&endpointID,"state_name",&stateName,"state_value",&stateValue);
+    int err = wrap_json_unpack(queryJ, "{s:s,s:i,s:s}", "endpoint_type", &pEndpointTypeStr,"endpoint_id",&endpointID,"property_name",&propertyName);
     if (err) {
         afb_req_fail_f(req, "Invalid arguments", "Args not a valid json object query=%s", json_object_get_string(queryJ));
         return;
     }
-    AFB_DEBUG("Parsed input arguments = endpoint_type:%d endpoint_id:%d state_name:%s state_value:%s", endpointType,endpointID,stateName,stateValue);
+    AFB_DEBUG("Parsed input arguments = endpoint_type:%s endpoint_id:%d property_name:%s", pEndpointTypeStr,endpointID,propertyName);
+    endpointType = EndpointTypeToEnum(pEndpointTypeStr);
 
-    // Check that state provided is within list of known state for this config
-    char * pDefaultStateValue = g_hash_table_lookup(g_AHLCtx.pDefaultStatesHT, stateName);
-    if (pDefaultStateValue == NULL)
+    EndpointInfoT * pEndpointInfo = GetEndpointInfo(endpointID,endpointType);
+    if (pEndpointInfo == NULL)
     {
-        afb_req_fail_f(req, "Invalid arguments", "State provided is not known to configuration query=%s", stateName);
+        afb_req_fail_f(req, "Endpoint not found", "Endpoint information not found for id:%d type%d",endpointID,endpointType);
         return;
     }
 
-    // Call policy to allow custom policy actions in current context
-    policyAllowed = Policy_SetState(endpointType, endpointID, stateName, stateValue); // TODO: Potentially retrieve modified value by policy (e.g. state change) 
-    if (!policyAllowed)
-    {
-        afb_req_fail(req, "Audio policy violation", "Set endpoint state not allowed in current context");
+    // Retrieve cached property value
+    json_object * propertyValJ = (json_object *)g_hash_table_lookup(pEndpointInfo->pPropTable,propertyName);
+    if (propertyValJ == NULL) {
+        afb_req_fail_f(req, "Property not found", "Property information not found: %s",propertyName);
         return;
     }
 
-    // Change the state of the endpoint as requested
+    json_object_get(propertyValJ); // Increase ref count so that framework does not free our JSON object
+    //AFB_WARNING("properties %s", json_object_get_string(propertyValJ));
+    //json_object_get(propertyValJ); // Increase ref count so that framework does not free our JSON object
 
-    afb_req_success(req, NULL, "Set endpoint state completed");
+    afb_req_success(req, propertyValJ, "Retrieved property value");
 }
 
-PUBLIC void audiohlapi_get_state(struct afb_req req)
+// Audio related events
+
+PUBLIC void audiohlapi_get_list_actions(struct afb_req req)
 {
     json_object *queryJ = NULL;
-    endpointID_t endpointID = UNDEFINED_ID;
-    EndpointTypeT endpointType = ENDPOINTTYPE_MAXVALUE;
-    json_object *stateValJ;
-    char * stateName = NULL;
-    char * stateValue = NULL;
+    char * audioRole = NULL;
+    json_object * roleActionsJ = NULL;
     
     queryJ = afb_req_json(req);
-    int err = wrap_json_unpack(queryJ, "{s:i,s:i,s:s}", "endpoint_type", &endpointType,"endpoint_id",&endpointID,"state_name",&stateName);
+    int err = wrap_json_unpack(queryJ, "{s:s}", "audio_role",&audioRole);
     if (err) {
         afb_req_fail_f(req, "Invalid arguments", "Args not a valid json object query=%s", json_object_get_string(queryJ));
         return;
     }
-    AFB_DEBUG("Parsed input arguments = endpoint_type:%d endpoint_id:%d state_name:%s", endpointType,endpointID,stateName);
+    AFB_DEBUG("Parsed input arguments = audio_role:%s",audioRole);
 
-    stateValJ = json_object_new_string(stateValue);
-    // return cached value
+    // Build and return list of actions for specific audio role
+    RoleInfoT * pRole = GetRole(audioRole);
+    if ( pRole == NULL )
+    {
+        afb_req_fail_f(req, "Invalid audio role", "Audio role was not found in configuration -> %s",audioRole);
+        return;
+    }
 
-    afb_req_success(req, stateValJ, "Retrieved state value");
+    roleActionsJ = json_object_new_array();
+    if (pRole->pActionList) {
+        int iNumberActions = pRole->pActionList->len;
+        for ( int i = 0 ; i < iNumberActions; i++)
+        {
+            char * pActionName = g_ptr_array_index(pRole->pActionList,i);
+            json_object * actionJ = json_object_new_string(pActionName);
+            json_object_array_add(roleActionsJ, actionJ);
+        }
+    }
+    
+    afb_req_success(req, roleActionsJ, "Retrieved action list for audio role");
 }
 
-// Sound events
-PUBLIC void audiohlapi_post_sound_event(struct afb_req req)
+PUBLIC void audiohlapi_post_action(struct afb_req req)
 {
     json_object *queryJ = NULL;
-    char * eventName = NULL;
-    char * mediaName = NULL;
+    char * actionName = NULL;  
     char * audioRole = NULL;
-    json_object *audioContext = NULL;
-    int policyAllowed = 0;
+    char * mediaName = NULL;
+    json_object *actionContext = NULL;
     
     queryJ = afb_req_json(req);
-    int err = wrap_json_unpack(queryJ, "{s:s,s:s,s?s,s?o}", "event_name", &eventName,"audio_role",&audioRole,"media_name",&mediaName,"audio_context",&audioContext);
+    int err = wrap_json_unpack(queryJ, "{s:s,s:s,s?s,s?o}", "action_name", &actionName,"audio_role",&audioRole,"media_name",&mediaName,"action_context",&actionContext);
     if (err) {
         afb_req_fail_f(req, "Invalid arguments", "Args not a valid json object query=%s", json_object_get_string(queryJ));
         return;
     }
-    AFB_DEBUG("Parsed input arguments = event_name:%s audio_role:%s media_name:%s", eventName,audioRole,mediaName);
+    AFB_DEBUG("Parsed input arguments = action_name:%s audio_role:%s", actionName,audioRole);
 
+    // Verify if known action for audio role
+    RoleInfoT * pRole = GetRole(audioRole);
+    if ( pRole == NULL )
+    {
+        afb_req_fail_f(req, "Invalid audio role", "Audio role was not found in configuration -> %s",audioRole);
+        return;
+    }
+
+    // Check to find specific action
+    int iActionFound = 0;
+    if (pRole->pActionList) {
+        int iNumberActions = pRole->pActionList->len;
+        char * pTargetActionName = NULL;
+        for ( int i = 0 ; i < iNumberActions; i++)
+        {
+            pTargetActionName = g_ptr_array_index(pRole->pActionList,i);
+            if ( strcasecmp(pTargetActionName,actionName)==0) {
+                iActionFound = 1;
+                break;
+            }
+        }
+    }
+
+    if (!iActionFound) {
+        afb_req_fail_f(req, "Event not found for audio role", "Event -> %s not found for role:%s",actionName,audioRole);
+        return;
+    }
+
+#ifndef AHL_DISCONNECT_POLICY  
     // Call policy to allow custom policy actions in current context (e.g. cancel playback)
-    policyAllowed = Policy_PostSoundEvent(eventName, audioRole, mediaName, (void*)audioContext); // TODO: Potentially retrieve modified value by policy (e.g. change media) 
+    int policyAllowed = Policy_PostAction(queryJ); 
     if (!policyAllowed)
     {
-        afb_req_fail(req, "Audio policy violation", "Post sound event not allowed in current context");
+        afb_req_fail(req, "Audio policy violation", "Post sound action not allowed in current context");
         return;
     }
+#endif
 
-    // TODO: Post sound event to rendering services (e.g. gstreamer file player wrapper or simple ALSA player)
+    //afb_event_push(g_AHLCtx.policyCtx.postEvent,queryJ);
 
-    afb_req_success(req, NULL, "Posted sound event");
+    afb_req_success(req, NULL, "Posted sound action");
  }
 
 
 // Monitoring
 PUBLIC void audiohlapi_subscribe(struct afb_req req)
 {
-    // json_object *queryJ = NULL;
-    
-    // queryJ = afb_req_json(req);
+    json_object *queryJ = NULL;
+    json_object * eventArrayJ = NULL;
 
-    // TODO: Iterate through array length, parsing the string value to actual events
-    // TODO: Subscribe to appropriate events from other services
+    queryJ = afb_req_json(req);
+    int err = wrap_json_unpack(queryJ, "{s:o}", "events", &eventArrayJ);
+    if (err) {
+        afb_req_fail_f(req, "Invalid arguments", "Args not a valid json object query=%s", json_object_get_string(queryJ));
+        return;
+    }
+    
+    int iNumEvents = json_object_array_length(eventArrayJ);
+    for (int i = 0; i < iNumEvents; i++)
+    {
+        char * pEventName = NULL;
+        json_object * jEvent = json_object_array_get_idx(eventArrayJ,i);
+        pEventName = (char *)json_object_get_string(jEvent);
+        if(pEventName == NULL) {
+            afb_req_fail(req, "failed", "Invalid event");
+			return;
+        }
+        else if(!strcasecmp(pEventName, AHL_ENDPOINT_PROPERTY_EVENT)) {
+			afb_req_subscribe(req, g_AHLCtx.policyCtx.propertyEvent);
+            AFB_DEBUG("Client subscribed to endpoint property events");
+		}
+        else if(!strcasecmp(pEventName, AHL_ENDPOINT_VOLUME_EVENT)) {
+			afb_req_subscribe(req, g_AHLCtx.policyCtx.volumeEvent);
+            AFB_DEBUG("Client subscribed to endpoint volume events");
+		}
+        else if(!strcasecmp(pEventName, AHL_POST_ACTION_EVENT)) {
+			afb_req_subscribe(req, g_AHLCtx.policyCtx.postActionEvent);
+            AFB_DEBUG("Client subscribed to post event calls events");
+		}
+        else {
+			afb_req_fail(req, "failed", "Invalid event");
+			return;
+		}
+    }
 
     afb_req_success(req, NULL, "Subscribe to events finished");
 }
 
 PUBLIC void audiohlapi_unsubscribe(struct afb_req req)
 {
-    // json_object *queryJ = NULL;
-    
-    // queryJ = afb_req_json(req);
+    json_object *queryJ = NULL;
+    json_object * eventArrayJ = NULL;
 
-    // TODO: Iterate through array length, parsing the string value to actual events
-    // TODO: Unsubscribe to appropriate events from other services
+    queryJ = afb_req_json(req);
+    int err = wrap_json_unpack(queryJ, "{s:o}", "events", &eventArrayJ);
+    if (err) {
+        afb_req_fail_f(req, "Invalid arguments", "Args not a valid json object query=%s", json_object_get_string(queryJ));
+        return;
+    }
+    
+    int iNumEvents = json_object_array_length(eventArrayJ);
+    for (int i = 0; i < iNumEvents; i++)
+    {
+        char * pEventName = NULL;
+        json_object * jEvent = json_object_array_get_idx(eventArrayJ,i);
+        pEventName = (char *)json_object_get_string(jEvent);
+        if(pEventName == NULL) {
+            afb_req_fail(req, "failed", "Invalid event");
+			return;
+        }
+        else if(!strcasecmp(pEventName, AHL_ENDPOINT_PROPERTY_EVENT)) {
+			afb_req_unsubscribe(req, g_AHLCtx.policyCtx.propertyEvent);
+            AFB_DEBUG("Client unsubscribed to endpoint property events");
+		}
+        else if(!strcasecmp(pEventName, AHL_ENDPOINT_VOLUME_EVENT)) {
+			afb_req_unsubscribe(req, g_AHLCtx.policyCtx.volumeEvent);
+            AFB_DEBUG("Client unsubscribed to endpoint volume events");
+		}
+        else if(!strcasecmp(pEventName, AHL_POST_ACTION_EVENT)) {
+			afb_req_unsubscribe(req, g_AHLCtx.policyCtx.postActionEvent);
+            AFB_DEBUG("Client unsubscribed to post event calls events");
+		}
+        else {
+			afb_req_fail(req, "failed", "Invalid event");
+			return;
+		}
+    }
 
-    afb_req_success(req, NULL, "Subscribe to events finished");
+    afb_req_success(req, NULL, "Unsubscribe to events finished");
 }
+
+// Since the policy is currently in the same binding, it cannot raise events on its own
+// This is a first step toward isolation, when policy is migrated in its own binding it can simply raise AGL events
+// This binding will register for these policy events and will execute the code below upon event reception
+PUBLIC void audiohlapi_raise_event(json_object * pEventDataJ)
+{
+    char * pEventName = NULL;
+
+    int err = wrap_json_unpack(pEventDataJ,"{s:s}","event_name", &pEventName);
+    if(err)
+    {
+       AFB_ERROR("Unable to retrieve event name");
+       return;
+    }
+
+    if(strcasecmp(pEventName, AHL_ENDPOINT_INIT_EVENT)==0) {
+        char * pAudioRole = NULL;
+        endpointID_t endpointID = AHL_UNDEFINED;
+        EndpointTypeT endpointType = ENDPOINTTYPE_MAXVALUE;
+        int err = wrap_json_unpack(pEventDataJ,"{s:i,s:i,s:s}",
+                            "endpoint_id", &endpointID, 
+                            "endpoint_type", &endpointType,
+                            "audio_role", &pAudioRole);
+        if(err)
+        {
+            AFB_ERROR("Unable to unpack property init event");
+            return;
+        }
+
+        RoleInfoT * pRole = GetRole(pAudioRole);
+        if ( pRole == NULL ){
+            AFB_ERROR("Requested audio role does not exist in current configuration -> %s", pAudioRole);
+            return;
+        }
+    
+        EndpointInfoT * pEndpointInfo = InitEndpointInfo();
+        g_assert_nonnull(pEndpointInfo);
+        PolicyCtxJSONToEndpoint(pEventDataJ,pEndpointInfo);
+
+        err = ReplaceEndpointInfoWithRole(endpointID,endpointType,pRole,pEndpointInfo);        
+        if(err == AHL_FAIL)
+        {
+            AFB_ERROR("Can't update EndpointInfo aborting");
+            return;
+        }
+
+        // Remove event name from object
+        // json_object_object_del(pEventDataJ,"event_name");
+        //afb_event_push(g_AHLCtx.policyCtx.propertyEvent,pEventDataJ); // Not broadcasted to application at this time
+    }
+    else if(strcasecmp(pEventName, AHL_ENDPOINT_PROPERTY_EVENT)==0) {
+        char * pAudioRole = NULL;
+        char * pPropertyName = NULL;
+        endpointID_t endpointID = AHL_UNDEFINED;
+        EndpointTypeT endpointType = ENDPOINTTYPE_MAXVALUE;
+        json_object * propValueJ = NULL;
+        int err = wrap_json_unpack(pEventDataJ,"{s:i,s:i,s:s,s:o,s:s}",
+                            "endpoint_id", &endpointID, 
+                            "endpoint_type", &endpointType,
+                            "property_name", &pPropertyName,
+                            "value",&propValueJ, 
+                            "audio_role", &pAudioRole);
+        if(err)
+        {
+            AFB_ERROR("Unable to unpack property event");
+            return;
+        }
+        RoleInfoT * pRole = GetRole(pAudioRole);
+        if ( pRole == NULL ){
+            AFB_ERROR("Requested audio role does not exist in current configuration -> %s", pAudioRole);
+            return;
+        }
+        EndpointInfoT * pEndpointInfo = GetEndpointInfoWithRole(endpointID,endpointType,pRole);
+        // update property value
+        if (pEndpointInfo->pPropTable)
+        {
+            json_type jType = json_object_get_type(propValueJ);
+            switch (jType) {
+                case json_type_double:
+                    Add_Endpoint_Property_Double(pEndpointInfo,pPropertyName,json_object_get_double(propValueJ));
+                    break;
+                case json_type_int:
+                    Add_Endpoint_Property_Int(pEndpointInfo,pPropertyName,json_object_get_int(propValueJ));
+                    break;
+                case json_type_string:
+                    Add_Endpoint_Property_String(pEndpointInfo,pPropertyName,json_object_get_string(propValueJ));
+                    break;
+                default:
+                    AFB_ERROR("Invalid property argument Property value not a valid json object query=%s", json_object_get_string(propValueJ));
+                    return ;
+            }
+        }
+        // Remove event name from object
+        json_object_object_del(pEventDataJ,"event_name");
+        afb_event_push(g_AHLCtx.policyCtx.propertyEvent,pEventDataJ);
+    }
+    else if(strcasecmp(pEventName, AHL_ENDPOINT_VOLUME_EVENT)==0) {
+        char * pAudioRole = NULL;
+        endpointID_t endpointID = AHL_UNDEFINED;
+        EndpointTypeT endpointType = ENDPOINTTYPE_MAXVALUE;
+        int iVolume = 0;
+        int err = wrap_json_unpack(pEventDataJ,"{s:i,s:i,s:i,s:s}",
+                            "endpoint_id", &endpointID, 
+                            "endpoint_type", &endpointType,
+                            "value",&iVolume, 
+                            "audio_role", &pAudioRole);
+        if(err)
+        {
+            AFB_ERROR("Unable to unpack volume event data");
+            return;
+        }
+        RoleInfoT * pRole = GetRole(pAudioRole);
+        if ( pRole == NULL ){
+            AFB_ERROR("Requested audio role does not exist in current configuration -> %s", pAudioRole);
+            return;
+        }
+        EndpointInfoT * pEndpointInfo = GetEndpointInfoWithRole(endpointID,endpointType,pRole);
+        // update volume value
+        pEndpointInfo->iVolume = iVolume;
+        // Remove event name from object
+        json_object_object_del(pEventDataJ,"event_name");
+        afb_event_push(g_AHLCtx.policyCtx.volumeEvent,pEventDataJ);
+    }
+    else if(strcasecmp(pEventName, AHL_POST_ACTION_EVENT)==0) {
+        // Remove event name from object
+        json_object_object_del(pEventDataJ,"event_name");
+        afb_event_push(g_AHLCtx.policyCtx.postActionEvent,pEventDataJ);
+    }
+    else if(strcasecmp(pEventName, AHL_STREAM_STATE_EVENT)==0) {
+        streamID_t streamID = AHL_UNDEFINED;
+        StreamEventT streamEvent = STREAM_EVENT_MAXVALUE;
+        int err = wrap_json_unpack(pEventDataJ,"{s:i,s:i}",
+                            "stream_id", &streamID, 
+                            "state_event", &streamEvent);
+        if(err)
+        {
+            AFB_ERROR("Unable to unpack stream event data");
+            return;
+        }
+
+        StreamInfoT * pStreamInfo = GetStream(streamID);
+        if (pStreamInfo == NULL) {
+            AFB_ERROR("Specified stream not currently active stream_id -> %d",streamID);
+            return;
+        }
+
+        // update streamstate value
+        switch (streamEvent) {
+            case STREAM_EVENT_START:   
+                pStreamInfo->streamState = STREAM_STATE_RUNNING;
+                break;
+            case STREAM_EVENT_STOP:   
+                pStreamInfo->streamState = STREAM_STATE_IDLE;      
+                break;
+            case STREAM_EVENT_PAUSE: 
+                pStreamInfo->streamState = STREAM_STATE_PAUSED;     
+                break;
+            case STREAM_EVENT_RESUME:       
+                pStreamInfo->streamState = STREAM_STATE_RUNNING;    
+                break;
+            case STREAM_EVENT_MUTED:    
+                pStreamInfo->streamMute = STREAM_MUTED;  
+                break;
+            case STREAM_EVENT_UNMUTED:    
+                pStreamInfo->streamMute = STREAM_UNMUTED;
+                break;
+            default:
+                AFB_ERROR("Unknown stream event");
+        }
+        
+        // Remove event name from object
+        json_object_object_del(pEventDataJ,"event_name");
+        AFB_ERROR("pEventDataJ=%s", json_object_get_string(pEventDataJ));
+        afb_event_push(pStreamInfo->streamStateEvent,pEventDataJ);   
+    }
+    else {        
+        AFB_ERROR("Unknown event name");        
+    }        
+}
\ No newline at end of file