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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"
static int uniqueIpcIndex = 1024;
ALSA_PLUG_PROTO(dmix);
PUBLIC AlsaPcmInfoT* AlsaCreateDmix(CtlSourceT *source, const char* pcmName, AlsaPcmInfoT *pcmSlave) {
snd_config_t *dmixConfig, *slaveConfig, *elemConfig, *pcmConfig;
AlsaPcmInfoT *pcmPlug= calloc(1,sizeof(AlsaPcmInfoT));
pcmPlug->uid= strdup(pcmName);
pcmPlug->cardid=pcmPlug->uid;
int error=0;
// refresh global alsalib config and create PCM top config
snd_config_update();
error += snd_config_top(&dmixConfig);
error += snd_config_set_id (dmixConfig, pcmPlug->cardid);
error += snd_config_imake_string(&elemConfig, "type", "dmix");
error += snd_config_add(dmixConfig, elemConfig);
error += snd_config_imake_integer(&elemConfig, "ipc_key", uniqueIpcIndex++);
error += snd_config_add(dmixConfig, elemConfig);
if (error) goto OnErrorExit;
error += snd_config_make_compound(&slaveConfig, "slave", 0);
error += snd_config_imake_string(&elemConfig, "pcm", pcmSlave->cardid);
if (pcmSlave->params.rate) {
error += snd_config_add(slaveConfig, elemConfig);
error += snd_config_imake_integer(&elemConfig, "rate", pcmSlave->params.rate);
}
error += snd_config_add(slaveConfig, elemConfig);
if (error) goto OnErrorExit;
// add leaf into config
error += snd_config_add(dmixConfig, slaveConfig);
if (error) goto OnErrorExit;
error = _snd_pcm_dmix_open(&pcmPlug->handle, pcmPlug->cardid, snd_config, dmixConfig, SND_PCM_STREAM_PLAYBACK , SND_PCM_NONBLOCK);
if (error) {
AFB_ApiError(source->api, "AlsaCreateDmix: fail to create Dmix=%s Slave=%s Error=%s", pcmPlug->cardid, pcmSlave->cardid, snd_strerror(error));
goto OnErrorExit;
}
error += snd_config_search(snd_config, "pcm", &pcmConfig);
error += snd_config_add(pcmConfig, dmixConfig);
if (error) {
AFB_ApiError(source->api, "AlsaCreateDmix: fail to add configDMIX=%s", pcmPlug->cardid);
goto OnErrorExit;
}
// Debug config & pcm
//AlsaDumpCtlConfig (source, "plug-dmix", dmixConfig, 1);
AFB_ApiNotice(source->api, "AlsaCreateDmix: %s done\n", pcmPlug->cardid);
return pcmPlug;
OnErrorExit:
AlsaDumpCtlConfig(source, "plug-dmix", dmixConfig, 1);
AFB_ApiNotice(source->api, "AlsaCreateDmix: OnErrorExit\n");
return NULL;
}
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