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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"
// Fulup need to be cleanup with new controller version
extern Lua2cWrapperT Lua2cWrap;
STATIC int ProcessOneChannel(CtlSourceT *source, const char* uid, json_object *channelJ, AlsaPcmChannels *channel) {
const char*channelUid;
int error = wrap_json_unpack(channelJ, "{ss,si !}", "uid", &channelUid, "port", &channel->port);
if (error) goto OnErrorExit;
channel->uid=strdup(channelUid);
return 0;
OnErrorExit:
AFB_ApiError(source->api, "ProcessOneChannel: sndcard=%s channel: missing (uid||port) json=%s", uid, json_object_get_string(channelJ));
return -1;
}
STATIC int ProcessSndParams(CtlSourceT *source, const char* uid, json_object *paramsJ, AlsaPcmHwInfoT *params) {
int error = wrap_json_unpack(paramsJ, "{s?i,s?i !}", "rate", ¶ms->rate, "channels", ¶ms->channels);
if (error) goto OnErrorExit;
return 0;
OnErrorExit:
AFB_ApiError(source->api, "ProcessSndParams: sndcard=%s params: missing (rate|channel) params=%s", uid, json_object_get_string(paramsJ));
return -1;
}
STATIC int ProcessOneSndCard(CtlSourceT *source, json_object *sndcardJ, AlsaPcmInfoT *snd) {
json_object *sinkJ, *paramsJ=NULL;
int error;
error = wrap_json_unpack(sndcardJ, "{ss,s?s,s?s,s?i,s?i,s?i,so,s?o !}", "uid",&snd->uid, "devpath",&snd->devpath, "cardid",&snd->cardid
, "cardidx",&snd->cardidx, "device",&snd->device, "subdev",&snd->subdev, "sink",&sinkJ, "params",¶msJ);
if (error || !snd->uid || !sinkJ || (!snd->devpath && !snd->cardid && snd->cardidx)) {
AFB_ApiNotice(source->api, "ProcessOneSndCard missing 'uid|path|cardid|cardidx|channels|device|subdev|numid|params' devin=%s", json_object_get_string(sndcardJ));
goto OnErrorExit;
}
if (paramsJ) error= ProcessSndParams(source, snd->uid, paramsJ, &snd->params);
if (error) {
AFB_ApiError(source->api, "ProcessOneSndCard: sndcard=%s invalid params=%s", snd->uid, json_object_get_string(paramsJ));
goto OnErrorExit;
}
// check snd card is accessible
error = AlsaByPathDevid(source, snd);
if (error) {
AFB_ApiError(source->api, "ProcessOneSndCard: sndcard=%s not found config=%s", snd->uid, json_object_get_string(sndcardJ));
goto OnErrorExit;
}
// protect each sndcard with a dmix plugin to enable audio-stream mixing
AlsaPcmInfoT *dmixPcm= AlsaCreateDmix(source, snd->uid, snd);
if (!dmixPcm) {
AFB_ApiError(source->api, "ProcessOneSndCard: sndcard=%s fail to attach dmix plugin", snd->uid);
goto OnErrorExit;
} else {
snd_pcm_close(dmixPcm->handle);
snd->cardid=dmixPcm->cardid;
}
switch (json_object_get_type(sinkJ)) {
case json_type_object:
snd->ccount=1;
snd->channels = calloc(snd->ccount+1, sizeof (AlsaPcmChannels));
error = ProcessOneChannel(source, snd->uid, sndcardJ, &snd->channels[0]);
if (error) goto OnErrorExit;
break;
case json_type_array:
snd->ccount = (int)json_object_array_length(sinkJ);
snd->channels = calloc(snd->ccount+1, sizeof (AlsaPcmChannels));
for (int idx = 0; idx < snd->ccount; idx++) {
json_object *channelJ = json_object_array_get_idx(sinkJ, idx);
error = ProcessOneChannel(source, snd->uid, channelJ, &snd->channels[idx]);
if (error) goto OnErrorExit;
}
break;
default:
AFB_ApiError(source->api, "ProcessOneSndCard:%s invalid sink=%s", snd->uid, json_object_get_string(sinkJ));
goto OnErrorExit;
}
return 0;
OnErrorExit:
return -1;
}
CTLP_LUA2C(snd_cards, source, argsJ, responseJ) {
AlsaPcmInfoT *sndcards;
int error;
size_t count;
switch (json_object_get_type(argsJ)) {
case json_type_object:
count= 1;
sndcards = calloc(count + 1, sizeof (AlsaPcmInfoT));
error = ProcessOneSndCard(source, argsJ, &sndcards[0]);
if (error) goto OnErrorExit;
break;
case json_type_array:
count = json_object_array_length(argsJ);
sndcards = calloc(count + 1, sizeof (AlsaPcmInfoT));
for (int idx = 0; idx < count; idx++) {
json_object *sndcardJ = json_object_array_get_idx(argsJ, idx);
error = ProcessOneSndCard(source, sndcardJ, &sndcards[idx]);
if (error) goto OnErrorExit;
}
break;
default:
AFB_ApiError(source->api, "L2C:sndcards: invalid argsJ= %s", json_object_get_string(argsJ));
goto OnErrorExit;
}
// register Sound card and multi when needed
Softmixer->sndcardCtl= sndcards;
if (count == 1) {
// only one sound card we multi would be useless
Softmixer->multiPcm = &sndcards[0];
} else {
AlsaPcmInfoT *pcmMulti;
// instantiate an alsa multi plugin
pcmMulti = AlsaCreateMulti(source, "PcmMulti");
if (!pcmMulti) goto OnErrorExit;
// Close Multi and save into globak handle for further use
snd_pcm_close(pcmMulti->handle);
Softmixer->multiPcm= pcmMulti;
}
return 0;
OnErrorExit:
AFB_ApiNotice(source->api, "L2C:sndcards fail to process: %s", json_object_get_string(argsJ));
return -1;
}
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