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/*
* Copyright (C) 2018 "IoT.bzh"
* Author Fulup Ar Foll <fulup@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#define _GNU_SOURCE // needed for vasprintf
#include "alsa-softmixer.h"
#include <string.h>
// Fulup need to be cleanup with new controller version
extern Lua2cWrapperT Lua2cWrap;
STATIC int ProcessOneSubdev(CtlSourceT *source, AlsaSndLoopT *loop, json_object *subdevJ, AlsaPcmInfoT *subdev) {
int error = wrap_json_unpack(subdevJ, "{si,si !}", "subdev", &subdev->subdev, "numid", &subdev->numid);
if (error) {
AFB_ApiError(source->api, "ProcessOneSubdev: loop=%s missing (uid|subdev|numid) json=%s", loop->uid, json_object_get_string(subdevJ));
goto OnErrorExit;
}
// create a fake uid and complete subdev info from loop handle
char subuid[30];
snprintf(subuid,sizeof(subuid),"loop:/%i/%i", subdev->subdev,subdev->numid);
subdev->uid = strdup(subuid);
subdev->device = loop->capture; // Fulup: with alsaloop softmixer only use capture device (playback is used by applications)
subdev->devpath = loop->devpath;
subdev->cardid = NULL; // force AlsaByPathDevId to rebuild a new one for each subdev
subdev->cardidx = loop->cardidx;
// check if card exist
error = AlsaByPathDevid(source, subdev);
if (error) {
AFB_ApiError(source->api, "ProcessOneSubdev: loop=%s fail to open subdev=%s", loop->uid, json_object_get_string(subdevJ));
goto OnErrorExit;
}
return 0;
OnErrorExit:
return -1;
}
STATIC int ProcessOneLoop(CtlSourceT *source, json_object *loopJ, AlsaSndLoopT *loop) {
json_object *subdevsJ=NULL, *devicesJ=NULL;
int error;
error = wrap_json_unpack(loopJ, "{ss,s?s,s?s,s?i,s?o,so}", "uid",&loop->uid, "devpath",&loop->devpath, "cardid",&loop->cardid
, "cardidx",&loop->cardidx, "devices",&devicesJ, "subdevs",&subdevsJ);
if (error || !loop->uid || !subdevsJ || (!loop->devpath && !loop->cardid && loop->cardidx)) {
AFB_ApiNotice(source->api, "ProcessOneLoop missing 'uid|devpath|cardid|cardidx|devices|subdevs' loop=%s", json_object_get_string(loopJ));
goto OnErrorExit;
}
// make sure useful information will not be removed
loop->uid=strdup(loop->uid);
if (loop->cardid) loop->cardid=strdup(loop->cardid);
if (loop->devpath) loop->cardid=strdup(loop->devpath);
// Default devices is payback=0 capture=1
if (!devicesJ) {
loop->playback=0;
loop->capture=1;
} else {
error = wrap_json_unpack(devicesJ, "{si,si}", "capture",&loop->capture, "playback", &loop->playback);
if (error) {
AFB_ApiNotice(source->api, "ProcessOneLoop=%s missing 'capture|playback' devices=%s", loop->uid, json_object_get_string(devicesJ));
goto OnErrorExit;
}
}
switch (json_object_get_type(subdevsJ)) {
case json_type_object:
loop->scount = 1;
loop->subdevs = calloc(loop->scount+1, sizeof (AlsaPcmInfoT));
error = ProcessOneSubdev(source, loop, subdevsJ, &loop->subdevs[0]);
if (error) goto OnErrorExit;
break;
case json_type_array:
loop->scount = (int)json_object_array_length(subdevsJ);
loop->subdevs = calloc(loop->scount+1, sizeof (AlsaPcmInfoT));
for (int idx = 0; idx < loop->scount; idx++) {
json_object *subdevJ = json_object_array_get_idx(subdevsJ, idx);
error = ProcessOneSubdev(source, loop, subdevJ, &loop->subdevs[idx]);
if (error) goto OnErrorExit;
}
break;
default:
AFB_ApiError(source->api, "L2C:ProcessOneLoop=%s invalid subdevs= %s", loop->uid, json_object_get_string(subdevsJ));
goto OnErrorExit;
}
return 0;
OnErrorExit:
return -1;
}
CTLP_LUA2C(snd_loops, source, argsJ, responseJ) {
int error;
AlsaSndLoopT *sndLoop = calloc (1, sizeof(AlsaSndLoopT));
if (json_object_get_type(argsJ) != json_type_object) {
AFB_ApiError(source->api, "L2C:sndloops: invalid object type= %s", json_object_get_string(argsJ));
goto OnErrorExit;
}
error = ProcessOneLoop(source, argsJ, sndLoop);
if (error) {
AFB_ApiError(source->api, "L2C:sndloops: invalid object= %s", json_object_get_string(argsJ));
goto OnErrorExit;
}
// register routed into global softmixer handle
Softmixer->loopCtl = sndLoop;
return 0;
OnErrorExit:
return -1;
}
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