diff options
Diffstat (limited to 'AlsaSound/HardAbsLayer/IntelHda/IntelHdaLib.c')
| -rw-r--r-- | AlsaSound/HardAbsLayer/IntelHda/IntelHdaLib.c | 138 |
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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