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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"
ALSA_PLUG_PROTO(softvol);
PUBLIC AlsaPcmInfoT* AlsaCreateVol(CtlSourceT *source, const char *pcmName, AlsaPcmInfoT* ctlTarget, AlsaPcmInfoT* pcmSlave) {
snd_config_t *volConfig, *elemConfig, *slaveConfig, *controlConfig,*pcmConfig;
int error = 0;
AlsaPcmInfoT *pcmPlug= malloc(sizeof(AlsaPcmInfoT));
pcmPlug->devid= pcmName;
// refresh global alsalib config and create PCM top config
snd_config_update();
error += snd_config_top(&volConfig);
error += snd_config_set_id (volConfig, pcmPlug->devid);
error += snd_config_imake_string(&elemConfig, "type", "softvol");
error += snd_config_add(volConfig, elemConfig);
if (error) goto OnErrorExit;
// add slave leaf
error += snd_config_make_compound(&slaveConfig, "slave", 0);
error += snd_config_imake_string(&elemConfig, "pcm", pcmSlave->devid);
error += snd_config_add(slaveConfig, elemConfig);
error += snd_config_add(volConfig, slaveConfig);
if (error) goto OnErrorExit;
// add control leaf
error += snd_config_make_compound(&controlConfig, "control", 0);
error += snd_config_imake_string(&elemConfig, "name", pcmName);
error += snd_config_add(controlConfig, elemConfig);
error += snd_config_imake_integer(&elemConfig, "card", ctlTarget->cardid);
error += snd_config_add(controlConfig, elemConfig);
error += snd_config_add(volConfig, controlConfig);
if (error) goto OnErrorExit;
// update top config to access previous plugin PCM
snd_config_update();
error = _snd_pcm_softvol_open(&pcmPlug->handle, pcmName, snd_config, volConfig, SND_PCM_STREAM_PLAYBACK , SND_PCM_NONBLOCK);
if (error) {
AFB_ApiError(source->api, "AlsaCreateVol: fail to create Plug=%s Slave=%s", pcmPlug->devid, pcmSlave->devid);
goto OnErrorExit;
}
error += snd_config_search(snd_config, "pcm", &pcmConfig);
error += snd_config_add(pcmConfig, volConfig);
if (!error) {
AFB_ApiError(source->api, "AlsaCreateDmix: fail to add configDMIX=%s", pcmPlug->devid);
goto OnErrorExit;
}
// Debug config & pcm
AlsaDumpCtlConfig (source, volConfig, 1);
//AlsaDumpPcmInfo(source, pcmPlug->handle, "pcmPlug->handle");
AFB_ApiNotice(source->api, "AlsaCreateVol: %s done", pcmPlug->devid);
return pcmPlug;
OnErrorExit:
AFB_ApiNotice(source->api, "AlsaCreateVol: OnErrorExit");
AlsaDumpCtlConfig(source, volConfig, 1);
return NULL;
}
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