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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"
PUBLIC AlsaPcmHwInfoT *ApiSinkGetParamsByZone(SoftMixerT *mixer, const char *target) {
// try to attach a zone as stream playback sink
AlsaSndZoneT *zone = ApiZoneGetByUid(mixer, target);
if (!zone) {
AFB_API_ERROR(mixer->api, "%s: Unable to find zone %s", __func__, target);
goto fail;
}
if (zone->nbSinks == 0) {
AFB_API_ERROR(mixer->api, "%s: Zone %s has no sinks", __func__, target);
goto fail;
}
// use 1st channel to find attached sound card.
AlsaPcmChannelT * pcmChannel = cds_list_first_entry(&zone->sinks.list, AlsaPcmChannelT , list);
const char *channel = pcmChannel->uid;
AFB_API_DEBUG(mixer->api, "%s: first channel uid is %s, zone has %d sinks", __func__, channel, zone->nbSinks);
AlsaSndPcmT * sink = NULL;
cds_list_for_each_entry(sink, &mixer->sinks.list, list) {
AlsaPcmChannelT * pcmChannel;
cds_list_for_each_entry(pcmChannel, &sink->channels.list, list) {
if (pcmChannel->uid && !strcasecmp(channel, pcmChannel->uid)) {
AFB_API_DEBUG(mixer->api, "%s: found %s, return", __func__, pcmChannel->uid);
return sink->sndcard->params;
}
}
}
fail:
return NULL;
}
PUBLIC AlsaSndPcmT *ApiSinkGetByUid(SoftMixerT *mixer, const char *target) {
// if no attached zone found, then try direct sink attachment
AlsaSndPcmT * sink;
cds_list_for_each_entry(sink, &mixer->sinks.list, list) {
if (sink->uid && !strcasecmp(sink->uid, target))
return sink;
}
return NULL;
}
static void sinkDestroy(SoftMixerT* mixer, void * arg) {
AlsaSndPcmT * sink = (AlsaSndPcmT*) arg;
AFB_API_DEBUG(mixer->api, "%s... %s", __func__, sink->uid);
cds_list_del(&sink->list);
mixer->nbSinks--;
ApiPcmDelete(mixer, sink);
}
AlsaSndPcmT * sinkCreate(SoftMixerT * mixer, afb_req_t request, const char * uid, json_object * argsJ) {
AlsaPcmCtlT* dmixConfig = NULL;
char *dmixUid = NULL;
AlsaSndPcmT * newSink = ApiPcmAttachOne(mixer, uid, SND_PCM_STREAM_PLAYBACK, argsJ);
if (!newSink) {
goto fail;
}
/* DMIX only supports REAL hardware */
if (!newSink->isPcmPlug) {
// move from hardware to DMIX attach to sndcard
if (asprintf(&dmixUid, "dmix-%s", newSink->uid) == -1) {
SOFTMIXER_NOMEM(mixer->api);
goto fail_pcm;
}
dmixConfig = AlsaCreateDmix(mixer, dmixUid, newSink, 0);
if (!dmixConfig) {
afb_req_fail_f(request, "internal-error", "mixer=%s sink=%s fail to create DMIX config", mixer->uid, newSink->uid);
goto fail_dmix;
}
}
mixer->nbSinks++;
cds_list_add_tail(&newSink->list, &mixer->sinks.list);
AlsaMixerTransactionObjectAdd(mixer->transaction, newSink, sinkDestroy);
return newSink;
fail:
fail_pcm:
// TODO delete PCM
fail_dmix:
free(dmixUid);
return NULL;
}
PUBLIC int ApiSinkAttach(SoftMixerT *mixer, afb_req_t request, const char * uid, json_object * argsJ) {
if (mixer->nbSinks >= mixer->max.sinks) {
afb_req_fail_f(request, "too-small", "mixer=%s max sink=%d", mixer->uid, mixer->max.sinks);
goto fail;
}
switch (json_object_get_type(argsJ)) {
long count;
case json_type_object: {
AlsaSndPcmT * newSink = sinkCreate(mixer, request, uid, argsJ);
if (!newSink) {
afb_req_fail_f(request, "bad-pcm", "mixer=%s invalid sink= %s", mixer->uid, json_object_get_string(argsJ));
goto fail;
}
break;
}
case json_type_array: {
count = json_object_array_length(argsJ);
if (count > (mixer->max.sinks - mixer->nbSinks)) {
afb_req_fail_f(request, "too-small", "mixer=%s max sink=%d", mixer->uid, mixer->max.sinks);
goto fail;
}
for (int idx = 0; idx < count; idx++) {
json_object *sinkJ = json_object_array_get_idx(argsJ, idx);
AlsaSndPcmT * newSink = sinkCreate(mixer, request, uid, sinkJ);
if (!newSink) {
afb_req_fail_f(request, "bad-pcm", "mixer=%s invalid sink= %s", mixer->uid, json_object_get_string(sinkJ));
goto fail;
}
}
break;
}
default:
afb_req_fail_f(request, "invalid-syntax", "mixer=%s sinks invalid argsJ= %s", mixer->uid, json_object_get_string(argsJ));
goto fail;
}
return 0;
fail:
return -1;
}
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