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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 ProcessOneRamp(CtlSourceT *source, const char* uid, json_object *rampJ, AlsaVolRampT *ramp) {
const char*rampUid;
int error = wrap_json_unpack(rampJ, "{ss,si,si,si !}"
, "uid", &rampUid
, "delay", &ramp->delay
, "up", &ramp->stepUp
, "down", &ramp->stepDown
);
if (error) goto OnErrorExit;
ramp->delay=ramp->delay*100; // move from ms to us
ramp->uid = strdup(rampUid);
return 0;
OnErrorExit:
AFB_ApiError(source->api, "ProcessOneRamp: sndcard=%s ramps: missing (uid||delay|up|down) json=%s", uid, json_object_get_string(rampJ));
return -1;
}
STATIC int ProcessOneSubdev(CtlSourceT *source, AlsaSndLoopT *loop, json_object *subdevJ, AlsaPcmHwInfoT *loopDefParams, AlsaPcmInfoT *subdev) {
json_object *paramsJ = NULL;
int error = wrap_json_unpack(subdevJ, "{si,si,s?o !}", "subdev", &subdev->subdev, "numid", &subdev->numid, "params", ¶msJ);
if (error) {
AFB_ApiError(source->api, "ProcessOneSubdev: loop=%s missing (uid|subdev|numid) json=%s", loop->uid, json_object_get_string(subdevJ));
goto OnErrorExit;
}
if (paramsJ) {
error = ProcessSndParams(source, loop->uid, paramsJ, loopDefParams);
if (error) {
AFB_ApiError(source->api, "ProcessOneLoop: sndcard=%s invalid params=%s", loop->uid, json_object_get_string(paramsJ));
goto OnErrorExit;
}
} else {
// use global loop params definition as default
memcpy(&subdev->params, loopDefParams, sizeof (AlsaPcmHwInfoT));
}
// 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, *paramsJ = NULL, *rampsJ = NULL;
int error;
error = wrap_json_unpack(loopJ, "{ss,s?s,s?s,s?i,s?o,so,s?o,s?o !}"
, "uid", &loop->uid
, "devpath", &loop->devpath
, "cardid", &loop->cardid
, "cardidx", &loop->cardidx
, "devices", &devicesJ
, "subdevs", &subdevsJ
, "params", ¶msJ
, "ramps", &rampsJ
);
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;
}
AlsaPcmHwInfoT *loopDefParams = alloca(sizeof (AlsaPcmHwInfoT));
if (paramsJ) {
error = ProcessSndParams(source, loop->uid, paramsJ, loopDefParams);
if (error) {
AFB_ApiError(source->api, "ProcessOneLoop: sndcard=%s invalid params=%s", loop->uid, json_object_get_string(paramsJ));
goto OnErrorExit;
}
} else {
loopDefParams->rate = ALSA_DEFAULT_PCM_RATE;
loopDefParams->rate = ALSA_DEFAULT_PCM_RATE;
loopDefParams->access = SND_PCM_ACCESS_RW_INTERLEAVED;
loopDefParams->format = SND_PCM_FORMAT_S16_LE;
loopDefParams->channels = 2;
loopDefParams->sampleSize = 0;
}
// Fake a sound card to check if loop is a valid Alsa snd driver
AlsaPcmInfoT sndLoop;
sndLoop.uid = loop->uid;
sndLoop.devpath = loop->devpath;
sndLoop.cardid = loop->cardid;
sndLoop.device = 0;
sndLoop.subdev = 0;
error = AlsaByPathDevid(source, &sndLoop);
if (error) {
AFB_ApiError(source->api, "ProcessOneLoop: loop=%s not found config=%s", loop->uid, json_object_get_string(loopJ));
goto OnErrorExit;
}
loop->uid = sndLoop.uid;
loop->devpath = sndLoop.devpath;
loop->cardid = sndLoop.cardid;
loop->cardidx = sndLoop.cardidx;
loop->registry= calloc (1,sizeof(RegistryHandleT));
// process volume ramps
if (rampsJ) {
int rcount;
switch (json_object_get_type(rampsJ)) {
case json_type_object:
rcount = 1;
loop->ramps = calloc(rcount+1, sizeof (AlsaVolRampT));
error = ProcessOneRamp(source, loop->uid, rampsJ, &loop->ramps[0]);
if (error) goto OnErrorExit;
break;
case json_type_array:
rcount = (int) json_object_array_length(rampsJ);
loop->ramps = calloc(rcount+1, sizeof (AlsaVolRampT));
for (int idx = 0; idx < rcount; idx++) {
json_object *rampJ = json_object_array_get_idx(rampsJ, idx);
error = ProcessOneRamp(source, loop->uid, rampJ, &loop->ramps[idx]);
if (error) goto OnErrorExit;
}
break;
default:
AFB_ApiError(source->api, "ProcessOneLoop:%s invalid ramps=%s", loop->uid, json_object_get_string(rampsJ));
goto OnErrorExit;
}
}
// 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, loopDefParams, &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, loopDefParams, &loop->subdevs[idx]);
if (error) goto OnErrorExit;
}
break;
default:
AFB_ApiError(source->api, "ProcessOneLoop=%s invalid subdevs= %s", loop->uid, json_object_get_string(subdevsJ));
goto OnErrorExit;
}
return 0;
OnErrorExit:
return -1;
}
PUBLIC int SndFrontend(CtlSourceT *source, json_object *argsJ) {
SoftMixerHandleT *mixerHandle = (SoftMixerHandleT*) source->context;
int error;
assert(mixerHandle);
if (mixerHandle->frontend) {
AFB_ApiError(source->api, "SndFrontend: mixer=%s SndFrontend already declared %s", mixerHandle->uid, json_object_get_string(argsJ));
goto OnErrorExit;
}
mixerHandle->frontend = calloc(1, sizeof (AlsaSndLoopT));
// or syntax purpose array is accepted but frontend should have a single driver entry
json_type type = json_object_get_type(argsJ);
if (type == json_type_array) {
size_t count = json_object_array_length(argsJ);
if (count != 1) {
AFB_ApiError(source->api, "SndFrontend: mixer=%s frontend only support on input driver args=%s", mixerHandle->uid, json_object_get_string(argsJ));
goto OnErrorExit;
}
argsJ = json_object_array_get_idx(argsJ, 0);
}
type = json_object_get_type(argsJ);
if (type != json_type_object) {
AFB_ApiError(source->api, "SndFrontend: mixer=%s invalid object type= %s", mixerHandle->uid, json_object_get_string(argsJ));
goto OnErrorExit;
}
error = ProcessOneLoop(source, argsJ, mixerHandle->frontend);
if (error) {
AFB_ApiError(source->api, "SndFrontend: mixer=%s invalid object= %s", mixerHandle->uid, json_object_get_string(argsJ));
goto OnErrorExit;
}
return 0;
OnErrorExit:
return -1;
}
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