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
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/* $OpenBSD: dev.h,v 1.3 2013/09/28 18:49:32 ratchov Exp $ */
/*
* Copyright (c) 2008-2012 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef DEV_H
#define DEV_H
#include "abuf.h"
#include "dsp.h"
#include "siofile.h"
/*
* audio stream state structure
*/
struct slotops
{
void (*onmove)(void *, int); /* clock tick */
void (*onvol)(void *, unsigned int); /* tell client vol changed */
void (*fill)(void *); /* request to fill a play block */
void (*flush)(void *); /* request to flush a rec block */
void (*eof)(void *); /* notify that play drained */
void (*mmcstart)(void *); /* request to start */
void (*mmcstop)(void *); /* request to stop */
void (*mmcloc)(void *, unsigned int); /* relocate to new position */
void (*exit)(void *); /* delete client */
};
struct slot {
struct slotops *ops; /* client callbacks */
struct slot *next; /* next on the play list */
struct dev *dev; /* device this belongs to */
void *arg; /* user data for callbacks */
struct aparams par; /* socket side params */
struct {
int weight; /* dynamic range */
int maxweight; /* max dynamic range allowed */
unsigned int vol; /* volume within the vol */
int drop; /* to drop on next read */
struct abuf buf; /* socket side buffer */
int bpf; /* byte per frame */
int slot_cmin, slot_cmax; /* slot source chans */
int dev_cmin, dev_cmax; /* device destination chans */
struct cmap cmap; /* channel mapper state */
struct resamp resamp; /* resampler state */
struct conv dec; /* format decoder params */
int join; /* channel join factor */
int expand; /* channel expand factor */
void *resampbuf, *decbuf; /* tmp buffers */
} mix;
struct {
int silence; /* to add on next write */
struct abuf buf; /* socket side buffer */
int bpf; /* byte per frame */
int slot_cmin, slot_cmax; /* slot destination chans */
int dev_cmin, dev_cmax; /* device source chans */
struct cmap cmap; /* channel mapper state */
struct resamp resamp; /* buffer for resampling */
struct conv enc; /* buffer for encoding */
int join; /* channel join factor */
int expand; /* channel expand factor */
void *resampbuf, *encbuf; /* tmp buffers */
} sub;
int xrun; /* underrun policy */
int dup; /* mono-to-stereo and alike */
#define SLOT_BUFSZ(s) \
((s)->appbufsz + (s)->dev->bufsz / (s)->dev->round * (s)->round)
int appbufsz; /* slot-side buffer size */
int round; /* slot-side block size */
int rate; /* slot-side sample rate */
int delta; /* pending clock ticks */
int delta_rem; /* remainder for delta */
int mode; /* MODE_{PLAY,REC} */
#define SLOT_INIT 0 /* not trying to do anything */
#define SLOT_START 1 /* buffer allocated */
#define SLOT_READY 2 /* buffer filled enough */
#define SLOT_RUN 3 /* buffer attached to device */
#define SLOT_STOP 4 /* draining */
int pstate;
#define SLOT_NAMEMAX 8
char name[SLOT_NAMEMAX]; /* name matching [a-z]+ */
unsigned int unit; /* instance of name */
unsigned int serial; /* global unique number */
unsigned int vol; /* current (midi) volume */
unsigned int tstate; /* mmc state */
};
/*
* audio device with plenty of slots
*/
struct dev {
struct dev *next;
struct slot *slot_list; /* audio streams attached */
struct midi *midi;
/*
* audio device (while opened)
*/
struct dev_sio sio;
struct aparams par; /* encoding */
int pchan, rchan; /* play & rec channels */
adata_t *rbuf; /* rec buffer */
adata_t *pbuf; /* array of play buffers */
#define DEV_PBUF(d) ((d)->pbuf + (d)->poffs * (d)->pchan)
int poffs; /* index of current play buf */
struct conv enc; /* native->device format */
struct conv dec; /* device->native format */
unsigned char *encbuf; /* buffer for encoding */
unsigned char *decbuf; /* buffer for decoding */
/*
* preallocated audio sub-devices
*/
#define DEV_NSLOT 8
struct slot slot[DEV_NSLOT];
unsigned int serial; /* for slot allocation */
/*
* desired parameters
*/
unsigned int reqmode; /* mode */
struct aparams reqpar; /* parameters */
int reqpchan, reqrchan; /* play & rec chans */
unsigned int reqbufsz; /* buffer size */
unsigned int reqround; /* block size */
unsigned int reqrate; /* sample rate */
unsigned int hold; /* hold the device open ? */
unsigned int autovol; /* auto adjust playvol ? */
unsigned int autostart; /* don't wait for MMC start */
unsigned int refcnt; /* number of openers */
#define DEV_NMAX 16 /* max number of devices */
unsigned int num; /* device serial number */
#define DEV_CFG 0 /* closed */
#define DEV_INIT 1 /* stopped */
#define DEV_RUN 2 /* playin & recording */
unsigned int pstate; /* one of above */
char *path; /* sio path */
/*
* actual parameters and runtime state (i.e. once opened)
*/
unsigned int mode; /* bitmap of MODE_xxx */
unsigned int bufsz, round, rate;
unsigned int prime;
/*
* MIDI time code (MTC)
*/
struct {
unsigned int origin; /* MTC start time */
unsigned int fps; /* MTC frames per second */
#define MTC_FPS_24 0
#define MTC_FPS_25 1
#define MTC_FPS_30 3
unsigned int fps_id; /* one of above */
unsigned int hr; /* MTC hours */
unsigned int min; /* MTC minutes */
unsigned int sec; /* MTC seconds */
unsigned int fr; /* MTC frames */
unsigned int qfr; /* MTC quarter frames */
int delta; /* rel. to the last MTC tick */
int refs;
} mtc;
/*
* MIDI machine control (MMC)
*/
#define MMC_OFF 0 /* ignore MMC messages */
#define MMC_STOP 1 /* stopped, can't start */
#define MMC_START 2 /* attempting to start */
#define MMC_RUN 3 /* started */
unsigned int tstate; /* one of above */
unsigned int master; /* master volume controller */
};
extern struct dev *dev_list;
void dev_log(struct dev *);
void dev_close(struct dev *);
struct dev *dev_new(char *, struct aparams *, unsigned int, unsigned int,
unsigned int, unsigned int, unsigned int, unsigned int);
struct dev *dev_bynum(int);
void dev_del(struct dev *);
void dev_adjpar(struct dev *, int, int, int, int, int);
int dev_init(struct dev *);
void dev_done(struct dev *);
int dev_getpos(struct dev *);
unsigned int dev_roundof(struct dev *, unsigned int);
/*
* interface to hardware device
*/
void dev_onmove(struct dev *, int);
void dev_cycle(struct dev *);
/*
* midi & midi call-backs
*/
void dev_mmcstart(struct dev *);
void dev_mmcstop(struct dev *);
void dev_mmcloc(struct dev *, unsigned int);
void dev_master(struct dev *, unsigned int);
void dev_midi_vol(struct dev *, struct slot *);
/*
* sio_open(3) like interface for clients
*/
void slot_log(struct slot *);
struct slot *slot_new(struct dev *, char *, struct slotops *, void *, int);
void slot_del(struct slot *);
void slot_setvol(struct slot *, unsigned int);
void slot_start(struct slot *);
void slot_stop(struct slot *);
void slot_read(struct slot *);
void slot_write(struct slot *);
#endif /* !defined(DEV_H) */
|
