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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;
PUBLIC snd_pcm_t* AlsaCreateDmix(CtlSourceT *source, const char *dmixName, const char *slaveName) {
AFB_ApiNotice(source->api, "AlsaCreateDmix: start ");
int cardIndex= snd_ctl_card_info_get_card(AlsaByPathInfo (source, "/dev/snd/by-id/usb-Focusrite_Scarlett_18i8_USB_10004EE6-00"));
AFB_ApiNotice(source->api, "AlsaCreateDmix: card index=%d ", cardIndex);
snd_pcm_t *dmixPcm;
snd_config_t *dmixConfig, *slaveConfig, *elemConfig;
snd_pcm_stream_t streamPcm = SND_PCM_STREAM_PLAYBACK;
int error = 0, streamMode = SND_PCM_NONBLOCK;
error += snd_config_top(&dmixConfig);
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", slaveName);
error += snd_config_add(slaveConfig, elemConfig);
if (error) goto OnErrorExit;
// add leaf into config
error += snd_config_add(dmixConfig, slaveConfig);
if (error) goto OnErrorExit;
snd_config_update();
//AlsaDumpConfig (source, snd_config, 1);
AlsaDumpCtlConfig (source, dmixConfig, 1);
error = _snd_pcm_dmix_open(&dmixPcm, dmixName, snd_config, dmixConfig, streamPcm , streamMode);
if (error) {
AFB_ApiError(source->api, "AlsaCreateDmix: fail to create DMIX=%s SLAVE=%s", dmixName, slaveName);
goto OnErrorExit;
}
AlsaDumpPcmInfo(source, dmixPcm, "DmixPCM");
AFB_ApiNotice(source->api, "AlsaCreateDmix: done");
return dmixPcm;
OnErrorExit:
AFB_ApiNotice(source->api, "AlsaCreateDmix: OnErrorExit");
return NULL;
}
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