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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(rate);
static void rateConfigClean(SoftMixerT *mixer, void * arg) {
snd_config_t * rateConfig = arg;
AFB_API_DEBUG(mixer->api, "%s... rate config", __func__);
snd_config_delete(rateConfig);
snd_config_update();
}
PUBLIC AlsaPcmCtlT* AlsaCreateRate(SoftMixerT *mixer, AlsaStreamAudioT * stream, const char* pcmName, AlsaPcmCtlT *pcmSlave, AlsaPcmHwInfoT *params, int open) {
snd_config_t *rateConfig, *slaveConfig, *elemConfig, *pcmConfig;
AFB_API_DEBUG(mixer->api,"%s : %s", __func__, pcmName);
AlsaPcmCtlT *pcmPlug = AlsaPcmCtlNew(mixer, pcmName);
if (!pcmPlug) {
SOFTMIXER_NOMEM(mixer->api);
goto OnErrorExit;
}
pcmPlug->cid.cardid = pcmName;
int error = 0;
// refresh global alsalib config and create PCM top config
snd_config_update();
error += snd_config_top(&rateConfig);
error += snd_config_set_id(rateConfig, pcmPlug->cid.cardid);
error += snd_config_imake_string(&elemConfig, "type", "rate");
error += snd_config_add(rateConfig, elemConfig);
if (error) goto OnErrorExit;
error += snd_config_make_compound(&slaveConfig, "slave", 0);
error += snd_config_imake_string(&elemConfig, "pcm", pcmSlave->cid.cardid);
error += snd_config_add(slaveConfig, elemConfig);
if (params->rate) {
error += snd_config_imake_integer(&elemConfig, "rate", params->rate);
error += snd_config_add(slaveConfig, elemConfig);
}
if (params->format) {
error += snd_config_imake_string(&elemConfig, "format", params->formatString);
error += snd_config_add(slaveConfig, elemConfig);
}
if (error) goto OnErrorExit;
// add leaf into config
error += snd_config_add(rateConfig, slaveConfig);
if (error) goto OnErrorExit;
error += snd_config_search(snd_config, "pcm", &pcmConfig);
error += snd_config_add(pcmConfig, rateConfig);
if (error) {
AFB_API_ERROR(mixer->api, "%s: fail to add config RATE=%s", __func__, pcmPlug->cid.cardid);
goto OnErrorExit;
}
if (open) error = _snd_pcm_rate_open(&pcmPlug->handle, pcmPlug->cid.cardid, snd_config, rateConfig, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
if (error) {
AFB_API_ERROR(mixer->api,
"%s: fail to create Rate=%s Slave=%s Error=%s",
__func__, pcmPlug->cid.cardid, pcmSlave->cid.cardid, snd_strerror(error));
goto OnErrorExit;
}
pcmPlug->private_data = rateConfig;
pcmPlug->private_data_clean = rateConfigClean;
// Debug config & pcm
//AlsaDumpCtlConfig(mixer, "plug-rate", pcmConfig, 1);
AlsaDumpCtlConfig (mixer, "plug-rate", rateConfig, 1);
AFB_API_NOTICE(mixer->api, "%s: %s done", __func__, pcmPlug->cid.cardid);
return pcmPlug;
OnErrorExit:
AlsaDumpCtlConfig(mixer, "plug-rate", rateConfig, 1);
AFB_API_NOTICE(mixer->api, "%s: OnErrorExit", __func__);
return NULL;
}
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