1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/*
* 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 <stdio.h>
#include <stdlib.h>
#include "ctl-plugin.h"
#include "wrap-json.h"
#include <alsa/asoundlib.h>
#ifndef PUBLIC
#define PUBLIC
#endif
#ifndef STATIC
#define STATIC static
#endif
#define MAINLOOP_WATCHDOG 30000
#define MAX_AUDIO_STREAMS 8*2
#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 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)
#ifndef PUBLIC
#define PUBLIC
#endif
#ifndef STATIC
#define STATIC static
#endif
// alsa-utils-bypath.c
typedef struct {
const char*uid;
int port;
} AlsaPcmChannels;
typedef struct {
unsigned int rate;
unsigned int channels;
snd_pcm_format_t format;
snd_pcm_access_t access;
size_t sampleSize;
} AlsaPcmHwInfoT;
typedef struct {
const char *uid;
const char *devpath;
const char *cardid;
int cardidx;
int device;
int subdev;
int numid;
int ccount;
snd_pcm_t *handle;
AlsaPcmChannels *channels;
AlsaPcmHwInfoT params;
} AlsaPcmInfoT;
typedef struct {
const char *uid;
snd_pcm_stream_t type;
AlsaPcmChannels *channels;
AlsaPcmInfoT *pcm;
} AlsaSndZoneT;
typedef struct {
const char *uid;
const char *devpath;
const char *cardid;
int cardidx;
int playback;
int capture;
int scount;
AlsaPcmInfoT *subdevs;
} AlsaSndLoopT;
typedef struct {
const char *uid;
const char *zone;
int volume;
int mute;
AlsaPcmInfoT *pcm;
AlsaPcmHwInfoT params;
} AlsaSndStreamT;
typedef struct {
AlsaSndLoopT *loopCtl;
AlsaPcmInfoT *sndcardCtl;
AlsaPcmInfoT *multiPcm;
AlsaPcmInfoT **zonePcms;
} SoftMixerHandleT;
extern SoftMixerHandleT *Softmixer;
// alsa-utils-bypath.c
PUBLIC snd_ctl_card_info_t* AlsaByPathInfo(CtlSourceT *source, const char *control);
PUBLIC AlsaPcmInfoT* AlsaByPathOpenPcm(CtlSourceT *source, AlsaPcmInfoT *dev, snd_pcm_stream_t direction);
PUBLIC snd_ctl_t *AlsaByPathOpenCtl(CtlSourceT *source, AlsaPcmInfoT *dev);
PUBLIC int AlsaByPathDevid(CtlSourceT *source, AlsaPcmInfoT *dev);
// alsa-api-*.c
PUBLIC int ProcessSndParams(CtlSourceT *source, const char* uid, json_object *paramsJ, AlsaPcmHwInfoT *params);
// alsa-utils-dump.c
PUBLIC void AlsaDumpFormats(CtlSourceT *source, snd_pcm_t *pcmHandle);
PUBLIC char *AlsaDumpPcmUid(snd_pcm_t *pcmHandle, char *buffer, size_t len);
PUBLIC void AlsaDumpCtlSubdev(CtlSourceT *source, snd_ctl_t *handle);
PUBLIC void AlsaDumpElemConfig(CtlSourceT *source, const char* info, const char* elem);
PUBLIC void AlsaDumpPcmInfo(CtlSourceT *source, const char* info, snd_pcm_t *pcm);
PUBLIC void AlsaDumpPcmParams(CtlSourceT *source, snd_pcm_hw_params_t *pcmHwParams);
PUBLIC void AlsaDumpCtlConfig(CtlSourceT *source, const char* info, snd_config_t *config, int indent);
#define ALSA_PCM_UID(pcmHandle, buffer) AlsaDumpPcmUid(pcmHandle, buffer, sizeof(buffer))
PUBLIC char *AlsaDumpCtlUid(snd_ctl_t *ctlHandle, char *buffer, size_t len);
#define ALSA_CTL_UID(ctlHandle, buffer) AlsaDumpCtlUid(ctlHandle, buffer, sizeof(buffer))
// alsa-core-ctl.c
PUBLIC snd_ctl_card_info_t *AlsaCtlGetInfo(CtlSourceT *source, const char *cardid);
PUBLIC snd_ctl_t *AlsaCtlOpenCtl(CtlSourceT *source, const char *cardid);
PUBLIC snd_ctl_t* AlsaCrlFromPcm(CtlSourceT *source, snd_pcm_t *pcm);
PUBLIC int AlsaCtlSubscribe(CtlSourceT *source, snd_ctl_t *ctlDev);
PUBLIC int AlsaCtlRegister(CtlSourceT *source, AlsaPcmInfoT *pcm, int numid);
PUBLIC int AlsaCtlNumidGetLong(CtlSourceT *source, snd_ctl_t* ctlDev, int numid, long* value);
PUBLIC int AlsaCtlNumidSetLong(CtlSourceT *source, snd_ctl_t* ctlDev, int numid, long value);
PUBLIC int AlsaCtlCreateControl(CtlSourceT *source, snd_ctl_t* ctlDev, AlsaPcmInfoT *subdevs, char* name, int ctlCount, int ctlMin, int ctlMax, int ctlStep, long value);
PUBLIC snd_ctl_elem_id_t *AlsaCtlGetNameElemId(CtlSourceT *source, snd_ctl_t* ctlDev, const char *ctlName);
PUBLIC int CtlElemIdSetLong(AFB_ApiT api, snd_ctl_t *ctlDev, snd_ctl_elem_id_t *elemId, long value);
PUBLIC int CtlElemIdGetLong(AFB_ApiT api, snd_ctl_t *ctlDev, snd_ctl_elem_id_t *elemId, long *value);
// alsa-core-pcm.c
PUBLIC int AlsaPcmConf(CtlSourceT *source, AlsaPcmInfoT *pcm, AlsaPcmHwInfoT *opts);
PUBLIC int AlsaPcmCopy(CtlSourceT *source, AlsaPcmInfoT *pcmIn, AlsaPcmInfoT *pcmOut, AlsaPcmHwInfoT *opts);
// alsa-plug-*.c _snd_pcm_PLUGIN_open_ see macro ALSA_PLUG_PROTO(plugin)
PUBLIC AlsaPcmInfoT* AlsaCreateDmix(CtlSourceT *source, const char* pcmName, AlsaPcmInfoT *pcmSlave, int open);
PUBLIC AlsaPcmInfoT* AlsaCreateMulti(CtlSourceT *source, const char *pcmName, int open);
PUBLIC AlsaPcmInfoT* AlsaCreateRoute(CtlSourceT *source, AlsaSndZoneT *zone, int open);
PUBLIC AlsaPcmInfoT* AlsaCreateStream(CtlSourceT *source, AlsaSndStreamT *stream, AlsaPcmInfoT *ctlControl, const char* ctlName, int open);
PUBLIC AlsaPcmInfoT* AlsaCreateRate(CtlSourceT *source, const char* pcmName, AlsaPcmInfoT *pcmSlave, int open);
#endif
|
