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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, AlsaPcmChannelT *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;
}
PUBLIC int ProcessSndParams(CtlSourceT *source, const char* uid, json_object *paramsJ, AlsaPcmHwInfoT *params) {
const char *format = NULL, *access = NULL;
// some default values
params->rate = ALSA_DEFAULT_PCM_RATE;
params->channels = 2;
params->sampleSize = 0;
int error = wrap_json_unpack(paramsJ, "{s?i,s?i, s?s, s?s !}", "rate", ¶ms->rate, "channels", ¶ms->channels, "format", &format, "access", &access);
if (error) goto OnErrorExit;
if (!format) params->format = SND_PCM_FORMAT_S16_LE;
else if (!strcasecmp(format, "S16_LE")) params->format = SND_PCM_FORMAT_S16_LE;
else if (!strcasecmp(format, "S16_BE")) params->format = SND_PCM_FORMAT_S16_BE;
else if (!strcasecmp(format, "U16_LE")) params->format = SND_PCM_FORMAT_U16_LE;
else if (!strcasecmp(format, "U16_BE")) params->format = SND_PCM_FORMAT_U16_BE;
else if (!strcasecmp(format, "S32_LE")) params->format = SND_PCM_FORMAT_S32_LE;
else if (!strcasecmp(format, "S32_BE")) params->format = SND_PCM_FORMAT_S32_BE;
else if (!strcasecmp(format, "U32_LE")) params->format = SND_PCM_FORMAT_U32_LE;
else if (!strcasecmp(format, "U32_BE")) params->format = SND_PCM_FORMAT_U32_BE;
else if (!strcasecmp(format, "S24_LE")) params->format = SND_PCM_FORMAT_S24_LE;
else if (!strcasecmp(format, "S24_BE")) params->format = SND_PCM_FORMAT_S24_BE;
else if (!strcasecmp(format, "U24_LE")) params->format = SND_PCM_FORMAT_U24_LE;
else if (!strcasecmp(format, "U24_BE")) params->format = SND_PCM_FORMAT_U24_BE;
else if (!strcasecmp(format, "S8")) params->format = SND_PCM_FORMAT_S8;
else if (!strcasecmp(format, "U8")) params->format = SND_PCM_FORMAT_U8;
else if (!strcasecmp(format, "FLOAT_LE")) params->format = SND_PCM_FORMAT_FLOAT_LE;
else if (!strcasecmp(format, "FLOAT_BE")) params->format = SND_PCM_FORMAT_FLOAT_LE;
else {
AFB_ApiNotice(source->api, "ProcessSndParams:%s(params) unsupported format 'S16_LE|S32_L|...' format=%s", uid, format);
goto OnErrorExit;
}
if (!access) params->access = SND_PCM_ACCESS_RW_INTERLEAVED;
else if (!strcasecmp(access, "MMAP_INTERLEAVED")) params->access = SND_PCM_ACCESS_MMAP_INTERLEAVED;
else if (!strcasecmp(access, "MMAP_NONINTERLEAVED")) params->access = SND_PCM_ACCESS_MMAP_NONINTERLEAVED;
else if (!strcasecmp(access, "MMAP_COMPLEX")) params->access = SND_PCM_ACCESS_MMAP_COMPLEX;
else if (!strcasecmp(access, "RW_INTERLEAVED")) params->access = SND_PCM_ACCESS_RW_INTERLEAVED;
else if (!strcasecmp(access, "RW_NONINTERLEAVED")) params->access = SND_PCM_ACCESS_RW_NONINTERLEAVED;
else {
AFB_ApiNotice(source->api, "ProcessSndParams:%s(params) unsupported access 'RW_INTERLEAVED|MMAP_INTERLEAVED|MMAP_COMPLEX' access=%s", uid, access);
goto OnErrorExit;
}
return 0;
OnErrorExit:
return -1;
}
STATIC int ProcessOneSndCard(CtlSourceT *source, json_object *sndcardJ, AlsaPcmInfoT *snd) {
json_object *sinkJ = NULL, *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;
}
} else {
snd->params.rate = ALSA_DEFAULT_PCM_RATE;
snd->params.access = SND_PCM_ACCESS_RW_INTERLEAVED;
snd->params.format = SND_PCM_FORMAT_S16_LE;
snd->params.channels = 2;
}
// 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
char dmixUid[100];
snprintf(dmixUid, sizeof (dmixUid), "Dmix-%s", snd->uid);
AlsaPcmInfoT *dmixPcm = AlsaCreateDmix(source, dmixUid, snd, 0);
if (!dmixPcm) {
AFB_ApiError(source->api, "ProcessOneSndCard: sndcard=%s fail to attach dmix plugin", snd->uid);
goto OnErrorExit;
} else {
snd->cardid = dmixPcm->cardid;
}
switch (json_object_get_type(sinkJ)) {
case json_type_object:
snd->ccount = 1;
snd->channels = calloc(snd->ccount + 1, sizeof (AlsaPcmChannelT));
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 (AlsaPcmChannelT));
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;
}
PUBLIC int SndBackend(CtlSourceT *source, json_object *argsJ) {
SoftMixerHandleT *mixerHandle = (SoftMixerHandleT*) source->context;
int error;
size_t count;
assert(mixerHandle);
if (mixerHandle->backend) {
AFB_ApiError(source->api, "SndBackend: mixer=%s backend already declared %s", mixerHandle->uid, json_object_get_string(argsJ));
goto OnErrorExit;
}
switch (json_object_get_type(argsJ)) {
case json_type_object:
count = 1;
mixerHandle->backend = calloc(count + 1, sizeof (AlsaPcmInfoT));
error = ProcessOneSndCard(source, argsJ, &mixerHandle->backend[0]);
if (error) goto OnErrorExit;
break;
case json_type_array:
count = json_object_array_length(argsJ);
mixerHandle->backend = 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, &mixerHandle->backend[idx]);
if (error) goto OnErrorExit;
}
break;
default:
AFB_ApiError(source->api, "SndBackend: mixer=%s invalid argsJ= %s", mixerHandle->uid, json_object_get_string(argsJ));
goto OnErrorExit;
}
if (count == 1) {
// only one sound card we multi would be useless
mixerHandle->multiPcm = &mixerHandle->backend[0];
} else {
// instantiate an alsa multi plugin
mixerHandle->multiPcm = AlsaCreateMulti(source, "PcmMulti", 0);
if (!mixerHandle->multiPcm) goto OnErrorExit;
}
return 0;
OnErrorExit:
AFB_ApiNotice(source->api, "SndBackend mixer=%s fail to process: %s", mixerHandle->uid, json_object_get_string(argsJ));
return -1;
}
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