/* * 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 "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_BUFFER_FRAMES_COUNT 1024 #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; void* buffer; size_t frameSize; unsigned int frameCount; 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; } 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; 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); 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 AlsaPcmConf(SoftMixerT *mixer, AlsaPcmCtlT *pcm, AlsaPcmHwInfoT *opts); PUBLIC int AlsaPcmCopy(SoftMixerT *mixer, AlsaStreamAudioT *streamAudio, AlsaPcmCtlT *pcmIn, AlsaPcmCtlT *pcmOut, AlsaPcmHwInfoT * opts); PUBLIC AlsaPcmCtlT* AlsaCreateSoftvol(SoftMixerT *mixer, AlsaStreamAudioT *stream, AlsaSndZoneT *zone, 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 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