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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
#ifndef _ALSA_SOFTMIXER_
#define _ALSA_SOFTMIXER_
#include <afb/afb-binding.h>
#include <systemd/sd-event.h>
#include <json-c/json_object.h>
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <alsa/asoundlib.h>
#include <stdbool.h>
#include "ctl-plugin.h"
#include "wrap-json.h"
#ifndef PUBLIC
#define PUBLIC
#endif
#ifndef STATIC
#define STATIC static
#endif
#define MAINLOOP_CONCURENCY 0
#define MAINLOOP_WATCHDOG 30000
#define ALSA_DEFAULT_PCM_RATE 48000
#define ALSA_DEFAULT_PCM_VOLUME 80
#define ALSA_CARDID_MAX_LEN 64
#define SMIXER_SUBDS_CTLS 3
#define SMIXER_DEFLT_LOOPS 4
#define SMIXER_DEFLT_SINKS 8
#define SMIXER_DEFLT_SOURCES 32
#define SMIXER_DEFLT_ZONES 32
#define SMIXER_DEFLT_STREAMS 32
#define SMIXER_DEFLT_RAMPS 8
#define ALSA_PLUG_PROTO(plugin) \
int _snd_pcm_ ## plugin ## _open(snd_pcm_t **pcmp, const char *name, snd_config_t *root, snd_config_t *conf, snd_pcm_stream_t stream, int mode)
// auto switch from Log to API request depending on request presence.
#define AFB_IfReqFailF(mixer, request, status, format, ...) \
if (request) AFB_ReqFailF(request, status, format, __VA_ARGS__); \
else AFB_ApiError(mixer->api, format, __VA_ARGS__);
#ifndef PUBLIC
#define PUBLIC
#endif
#ifndef STATIC
#define STATIC static
#endif
typedef enum {
FONTEND_NUMID_IGNORE,
FONTEND_NUMID_PAUSE,
FONTEND_NUMID_RUN
} RegistryNumidT;
typedef struct {
snd_pcm_t *pcmIn;
snd_pcm_t *pcmOut;
AFB_ApiT api;
sd_event_source* evtsrc;
size_t frame_size;
snd_pcm_uframes_t latency; /* final latency in frames */
unsigned int latency_reqtime; /* in us */
// IO Job
void * buf;
snd_pcm_uframes_t buf_count; /* filled samples */
snd_pcm_uframes_t buf_size; /* buffer size in frames */
unsigned int channels;
sd_event *sdLoop;
pthread_t thread;
int tid;
char* info;
} AlsaPcmCopyHandleT;
typedef struct {
const char*name;
int numid;
int count;
long min;
long max;
long step;
} AlsaSndControlT;
typedef struct {
const char*uid;
int port;
} AlsaPcmChannelT;
typedef struct {
unsigned int rate;
unsigned int channels;
const char *formatS;
snd_pcm_format_t format;
snd_pcm_access_t access;
size_t sampleSize;
} AlsaPcmHwInfoT;
typedef struct {
const char *uid;
int delay; // delay between volset in us
int stepDown; // linear %
int stepUp; // linear %
} AlsaVolRampT;
typedef struct {
int cardidx;
const char *devpath;
const char *cardid;
const char *name;
const char *longname;
int device;
int subdev;
} AlsaDevInfoT;
typedef struct {
int ccount;
AlsaDevInfoT cid;
snd_pcm_t *handle;
AlsaPcmHwInfoT *params;
uint32_t avail_min;
} AlsaPcmCtlT;
typedef struct {
int numid;
RegistryNumidT type;
AlsaPcmCtlT *pcm;
} RegistryEntryPcmT;
typedef struct {
long rcount;
AlsaDevInfoT cid;
snd_ctl_t *ctl;
AlsaPcmHwInfoT *params;
RegistryEntryPcmT **registry;
} AlsaSndCtlT;
typedef struct {
const char *uid;
AlsaPcmChannelT **sources;
AlsaPcmChannelT **sinks;
int ccount;
AlsaPcmHwInfoT *params;
} AlsaSndZoneT;
typedef struct {
const char *uid;
const char *verb;
unsigned int ccount;
AlsaSndCtlT *sndcard;
AlsaSndControlT volume;
AlsaSndControlT mute;
AlsaPcmChannelT **channels;
snd_pcm_stream_t direction;
} AlsaSndPcmT;
typedef struct {
const char*uid;
int index;
int numid;
} AlsaLoopSubdevT;
typedef struct {
const char *uid;
int playback;
int capture;
long scount;
AlsaSndCtlT *sndcard;
AlsaLoopSubdevT **subdevs;
} AlsaSndLoopT;
typedef struct {
const char *uid;
const char *verb;
const char *info;
const char *sink;
const char *source;
const char *ramp;
int volume;
int mute;
AlsaPcmHwInfoT *params;
AlsaPcmCopyHandleT *copy;
} AlsaStreamAudioT;
typedef struct {
const char *uid;
const char *info;
AFB_ApiT api;
sd_event *sdLoop;
struct {
unsigned int loops;
unsigned int sinks;
unsigned int sources;
unsigned int zones;
unsigned int streams;
unsigned int ramps;
} max;
AlsaSndLoopT **loops;
AlsaSndPcmT **sinks;
AlsaSndPcmT **sources;
AlsaSndZoneT **zones;
AlsaStreamAudioT **streams;
AlsaVolRampT **ramps;
} SoftMixerT;
// alsa-utils-bypath.c
PUBLIC snd_ctl_card_info_t *AlsaByPathInfo(SoftMixerT *mixer, const char *devpath);
PUBLIC AlsaPcmCtlT *AlsaByPathOpenPcm(SoftMixerT *mixer, AlsaDevInfoT *pcmId, snd_pcm_stream_t direction);
PUBLIC snd_ctl_t *AlsaByPathOpenCtl(SoftMixerT *mixer, const char *uid, AlsaSndCtlT *dev);
// alsa-utils-dump.c
#define ALSA_PCM_UID(pcmHandle, buffer) AlsaDumpPcmUid(pcmHandle, buffer, sizeof(buffer))
#define ALSA_CTL_UID(ctlHandle, buffer) AlsaDumpCtlUid(ctlHandle, buffer, sizeof(buffer))
PUBLIC json_object *AlsaDumpObjF(const char *format, ...);
PUBLIC char *AlsaDumpPcmUid(snd_pcm_t *pcmHandle, char *buffer, size_t len);
PUBLIC char *AlsaDumpCtlUid(snd_ctl_t *ctlHandle, char *buffer, size_t len);
PUBLIC void AlsaDumpFormats(SoftMixerT *mixer, snd_pcm_t *pcmHandle);
PUBLIC void AlsaDumpCtlSubdev(SoftMixerT *mixer, snd_ctl_t *handle);
PUBLIC void AlsaDumpPcmParams(SoftMixerT *mixer, snd_pcm_hw_params_t *pcmHwParams);
PUBLIC void AlsaDumpPcmInfo(SoftMixerT *mixer, const char* info, snd_pcm_t *pcm);
PUBLIC void AlsaDumpElemConfig(SoftMixerT *mixer, const char* info, const char* elem);
PUBLIC void AlsaDumpCtlConfig(SoftMixerT *mixer, const char* info, snd_config_t *config, int indent);
// alsa-core-ctl.c
PUBLIC snd_ctl_elem_id_t *AlsaCtlGetNumidElemId(SoftMixerT *mixer, AlsaSndCtlT *sndcard, int numid) ;
PUBLIC snd_ctl_elem_id_t *AlsaCtlGetNameElemId(SoftMixerT *mixer, AlsaSndCtlT *sndcard, const char *ctlName) ;
PUBLIC snd_ctl_t *AlsaCtlOpenCtl(SoftMixerT *mixer, const char *cardid) ;
PUBLIC int CtlElemIdGetLong(SoftMixerT *mixer, AlsaSndCtlT *sndcard, snd_ctl_elem_id_t *elemId, long *value) ;
PUBLIC int CtlElemIdSetLong(SoftMixerT *mixer, AlsaSndCtlT *sndcard, snd_ctl_elem_id_t *elemId, long value) ;
PUBLIC snd_ctl_card_info_t *AlsaCtlGetInfo(SoftMixerT *mixer, const char *cardid) ;
PUBLIC int AlsaCtlNumidSetLong(SoftMixerT *mixer, AlsaSndCtlT *sndcard, int numid, long value) ;
PUBLIC int AlsaCtlNumidGetLong(SoftMixerT *mixer, AlsaSndCtlT *sndcard, int numid, long* value) ;
PUBLIC int AlsaCtlNameSetLong(SoftMixerT *mixer, AlsaSndCtlT *sndcard, const char *ctlName, long value) ;
PUBLIC int AlsaCtlNameGetLong(SoftMixerT *mixer, AlsaSndCtlT *sndcard, const char *ctlName, long* value) ;
PUBLIC int AlsaCtlCreateControl(SoftMixerT *mixer, AlsaSndCtlT *sndcard, char* ctlName, int ctlCount, int ctlMin, int ctlMax, int ctlStep, long value) ;
PUBLIC snd_ctl_t* AlsaCrlFromPcm(SoftMixerT *mixer, snd_pcm_t *pcm) ;
PUBLIC int AlsaCtlSubscribe(SoftMixerT *mixer, const char *uid, AlsaSndCtlT *sndcard) ;
PUBLIC int AlsaCtlRegister(SoftMixerT *mixer, AlsaSndCtlT *sndcard, AlsaPcmCtlT *pcmdev, RegistryNumidT type, int numid);
// alsa-core-pcm.c
PUBLIC int AlsaPcmConf(SoftMixerT *mixer, AlsaPcmCtlT *pcm, AlsaPcmHwInfoT *opts, int mode);
PUBLIC int AlsaPcmCopy(SoftMixerT *mixer, AlsaStreamAudioT *stream, AlsaPcmCtlT *pcmIn, AlsaPcmCtlT *pcmOut, AlsaPcmHwInfoT * opts);
// alsa-plug-*.c _snd_pcm_PLUGIN_open_ see macro ALSA_PLUG_PROTO(plugin)
PUBLIC int AlsaPcmCopy(SoftMixerT *mixer, AlsaStreamAudioT *streamAudio, AlsaPcmCtlT *pcmIn, AlsaPcmCtlT *pcmOut, AlsaPcmHwInfoT * opts);
PUBLIC AlsaPcmCtlT* AlsaCreateSoftvol(SoftMixerT *mixer, AlsaStreamAudioT *stream, char *slaveid, AlsaSndCtlT *sndcard, char* ctlName, int max, int open);
PUBLIC AlsaPcmCtlT* AlsaCreateRoute(SoftMixerT *mixer, AlsaSndZoneT *zone, int open);
PUBLIC AlsaPcmCtlT* AlsaCreateRate(SoftMixerT *mixer, const char* pcmName, AlsaPcmCtlT *pcmSlave, AlsaPcmHwInfoT *params, int open);
PUBLIC AlsaPcmCtlT* AlsaCreateDmix(SoftMixerT *mixer, const char* pcmName, AlsaSndPcmT *pcmSlave, int open);
// alsa-api-*
PUBLIC AlsaLoopSubdevT *ApiLoopFindSubdev(SoftMixerT *mixer, const char *streamUid, const char *targetUid, AlsaSndLoopT **loop);
PUBLIC int ApiLoopAttach(SoftMixerT *mixer, AFB_ReqT request, const char *uid, json_object * argsJ);
PUBLIC AlsaPcmHwInfoT *ApiPcmSetParams(SoftMixerT *mixer, const char *uid, json_object *paramsJ);
PUBLIC AlsaSndPcmT *ApiPcmAttachOne(SoftMixerT *mixer, const char *uid, snd_pcm_stream_t direction, json_object *argsJ);
PUBLIC AlsaVolRampT *ApiRampGetByUid(SoftMixerT *mixer, const char *uid);
PUBLIC int ApiRampAttach(SoftMixerT *mixer, AFB_ReqT request, const char *uid, json_object *argsJ);
PUBLIC AlsaPcmHwInfoT *ApiSinkGetParamsByZone(SoftMixerT *mixer, const char *target);
PUBLIC int ApiSinkAttach(SoftMixerT *mixer, AFB_ReqT request, const char *uid, json_object * argsJ);
PUBLIC AlsaSndPcmT *ApiSinkGetByUid(SoftMixerT *mixer, const char *target);
PUBLIC AlsaSndCtlT *ApiSourceFindSubdev(SoftMixerT *mixer, const char *target);
PUBLIC int ApiSourceAttach(SoftMixerT *mixer, AFB_ReqT request, const char *uid, json_object * argsJ);
PUBLIC int ApiStreamAttach(SoftMixerT *mixer, AFB_ReqT request, const char *uid, const char *prefix, json_object * argsJ);
PUBLIC AlsaSndZoneT *ApiZoneGetByUid(SoftMixerT *mixer, const char *target);
PUBLIC int ApiZoneAttach(SoftMixerT *mixer, AFB_ReqT request, const char *uid, json_object * argsJ);
// alsa-effect-ramp.c
PUBLIC AlsaVolRampT *ApiRampGetByUid(SoftMixerT *mixer, const char *uid);
PUBLIC int AlsaVolRampApply(SoftMixerT *mixer, AlsaSndCtlT *sndcard, AlsaStreamAudioT *stream, json_object *rampJ);
#endif
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