Late Evening Commit

1 files changed, 138 insertions, 0 deletions

diff --git a/AlsaSound/HardAbsLayer/IntelHda/IntelHdaLib.c b/AlsaSound/HardAbsLayer/IntelHda/IntelHdaLib.c
new file mode 100644
index 0000000..ad4fcf4
--- /dev/null
+++ b/AlsaSound/HardAbsLayer/IntelHda/IntelHdaLib.c
@@ -0,0 +1,138 @@
+/*
+ * 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 
+ */
+#define _GNU_SOURCE  // needed for vasprintf
+#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 "IntelHdaLib.h"
+#include "AlsaMixerHal.h"
+
+static struct afb_service srvitf;
+
+// Normalise Intel-HDA numid    
+static AlsaHalMapT  alsaCtlsMap[]= { // check with amixer -D hw:xx controls; amixer -D "hw:3" cget numid=xx
+ /* ACTION(enum) NUMID(int) IFACE(enum) VALUES(int) MinVal(int) MaxVal(int) Step(int) ACL=READ|WRITE|RW INFO=comment */
+  { .action=Master_Playback_Volume, .numid=16, .group=OUTVOL, .values=1, .minval=0, .maxval= 87 , .step=0, .acl=RW, .info= "Master Playback Volume" },
+  { .action=PCM_Playback_Volume   , .numid=27, .group=PCMVOL, .values=2, .minval=0, .maxval= 255, .step=0, .acl=RW, .info= "PCM Playback Volume" },
+  { .action=PCM_Playback_Switch   , .numid=17, .group=SWITCH, .values=1, .minval=0, .maxval= 1  , .step=0, .acl=RW, .info= "Master Playback Switch" },
+  { .action=Capture_Volume        , .numid=12, .group=INVOL , .values=2, .minval=0, .maxval= 31 , .step=0, .acl=RW, .info= "Capture Volume" },
+  { .numid=0  } /* marker for end of the array */
+} ;
+
+// Warning: Longname is used to locate board on the system
+static AlsaHalSndT alsaSndCard  = {
+    .longname= "HDA Intel PCH",
+    .info    = "Hardware Abstraction Layer for IntelHDA sound card",
+    .ctls    = alsaCtlsMap,
+};
+
+
+// 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);
+        struct json_object *x, *resp = NULL;
+	const char *info = NULL;
+
+	if (result) {
+	    INFO (afbIface, "result=[%s]\n", json_object_to_json_string (result));
+            if (json_object_object_get_ex(result, "request", &x) && json_object_object_get_ex(x, "info", &x))
+            info = json_object_get_string(x);
+            if (!json_object_object_get_ex(result, "response", &resp)) resp = NULL;
+        }
+        
+        // push message respond
+	if (iserror) afb_req_fail_f(request,  "Fail", info);
+	else         afb_req_success(request, resp, info);
+        
+        // free calling request
+	afb_req_unref(request);
+}
+
+// Create and subscribe to alsacore ctl events
+PUBLIC void intelHdaMonitor(struct afb_req request) {
+    
+    // save request in session as it might be used after return by callback
+    struct afb_req *handle = afb_req_store(request);
+
+    // push request to low level binding
+    if (!handle) afb_req_fail(request, "error", "out of memory");
+    else    afb_service_call(srvitf, "alsacore", "subctl", json_object_get(afb_req_json(request)), alsaSubcribeCB, handle);
+
+    // success/failure messages return from callback    
+}
+
+// Subscribe to AudioBinding events
+PUBLIC void intelHdaSubscribe (struct afb_req request) {
+    const char *devid = afb_req_value(request, "devid");
+    if (devid == NULL) {
+        afb_req_fail_f (request, "devid-missing", "devid=hw:xxx missing");
+    }
+    
+}
+
+
+// Call when all bindings are loaded and ready to accept request
+PUBLIC void intelHdaGetVol(struct afb_req request) {
+   
+    // Should call here Hardware Alsa Abstraction Layer for corresponding Sound Card
+    afb_req_success (request, NULL, NULL);
+    return;
+    
+}
+
+PUBLIC void intelHdaSetVol(struct afb_req request) {
+    const char *arg;
+    char *pcm;
+    
+    arg = afb_req_value(request, "vol");
+    if (arg == NULL) {
+        afb_req_fail_f (request, "argument-missing", "vol=[0,100] missing");
+        goto ExitOnError;
+    }
+    
+    arg = afb_req_value(request, "pcm");
+    if (arg == NULL) pcm="Master";
+   
+    // Should call here Hardware Alsa Abstraction Layer for corresponding Sound Card
+    afb_req_success (request, NULL, NULL);
+    return;
+    
+  ExitOnError:
+    return;
+    
+}
+
+
+// this function is call after all binder are loaded and initialised
+PUBLIC int  intelHdaInit (struct afb_service service, const char *cardname) {
+    srvitf = service;
+    
+    // API prefix is used as sndcard halname
+    alsaSndCard.halname= cardname;
+    return 0;
+}
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