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authorFulup Ar Foll <fulup@iot.bzh>2017-03-08 23:56:40 +0100
committerFulup Ar Foll <fulup@iot.bzh>2017-03-08 23:56:40 +0100
commita237499e8c2e2a045ae3eea0b9a4aaac12032e81 (patch)
tree4971c10f24585fa04f0a414cb319d3b0554c8a85 /AlsaSound/HardAbsLayer/IntelHda/IntelHdaLib.c
parent1393b5d318e22dbd1625692847a51c27932fd442 (diff)
Late Evening Commit
Diffstat (limited to 'AlsaSound/HardAbsLayer/IntelHda/IntelHdaLib.c')
-rw-r--r--AlsaSound/HardAbsLayer/IntelHda/IntelHdaLib.c138
1 files changed, 138 insertions, 0 deletions
diff --git a/AlsaSound/HardAbsLayer/IntelHda/IntelHdaLib.c b/AlsaSound/HardAbsLayer/IntelHda/IntelHdaLib.c
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+++ 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;
+} \ No newline at end of file