diff options
Diffstat (limited to 'plugins/alsa/alsa-api-sndcards.c')
| -rw-r--r-- | plugins/alsa/alsa-api-sndcards.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/plugins/alsa/alsa-api-sndcards.c b/plugins/alsa/alsa-api-sndcards.c new file mode 100644 index 0000000..d48abd8 --- /dev/null +++ b/plugins/alsa/alsa-api-sndcards.c @@ -0,0 +1,166 @@ +/* + * 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; +} |