Annotation of src/usr.bin/sndiod/dev.h, Revision 1.22
1.22 ! ratchov 1: /* $OpenBSD: dev.h,v 1.21 2019/07/12 06:30:55 ratchov Exp $ */
1.1 ratchov 2: /*
3: * Copyright (c) 2008-2012 Alexandre Ratchov <alex@caoua.org>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17: #ifndef DEV_H
18: #define DEV_H
19:
20: #include "abuf.h"
21: #include "dsp.h"
22: #include "siofile.h"
23:
24: /*
25: * audio stream state structure
26: */
27:
28: struct slotops
29: {
1.7 ratchov 30: void (*onmove)(void *); /* clock tick */
1.11 ratchov 31: void (*onvol)(void *); /* tell client vol changed */
1.1 ratchov 32: void (*fill)(void *); /* request to fill a play block */
33: void (*flush)(void *); /* request to flush a rec block */
34: void (*eof)(void *); /* notify that play drained */
35: void (*exit)(void *); /* delete client */
36: };
37:
38: struct slot {
39: struct slotops *ops; /* client callbacks */
40: struct slot *next; /* next on the play list */
41: struct dev *dev; /* device this belongs to */
1.13 ratchov 42: struct opt *opt; /* config used */
1.1 ratchov 43: void *arg; /* user data for callbacks */
44: struct aparams par; /* socket side params */
45: struct {
1.10 ratchov 46: int weight; /* dynamic range */
1.1 ratchov 47: unsigned int vol; /* volume within the vol */
48: struct abuf buf; /* socket side buffer */
49: int bpf; /* byte per frame */
1.19 ratchov 50: int nch; /* number of play chans */
1.1 ratchov 51: struct cmap cmap; /* channel mapper state */
52: struct resamp resamp; /* resampler state */
53: struct conv dec; /* format decoder params */
54: int join; /* channel join factor */
55: int expand; /* channel expand factor */
56: void *resampbuf, *decbuf; /* tmp buffers */
57: } mix;
58: struct {
59: struct abuf buf; /* socket side buffer */
1.5 ratchov 60: int prime; /* initial cycles to skip */
1.1 ratchov 61: int bpf; /* byte per frame */
1.19 ratchov 62: int nch; /* number of rec chans */
1.1 ratchov 63: struct cmap cmap; /* channel mapper state */
64: struct resamp resamp; /* buffer for resampling */
65: struct conv enc; /* buffer for encoding */
66: int join; /* channel join factor */
67: int expand; /* channel expand factor */
68: void *resampbuf, *encbuf; /* tmp buffers */
69: } sub;
70: int xrun; /* underrun policy */
1.5 ratchov 71: int skip; /* cycles to skip (for xrun) */
1.1 ratchov 72: #define SLOT_BUFSZ(s) \
73: ((s)->appbufsz + (s)->dev->bufsz / (s)->dev->round * (s)->round)
74: int appbufsz; /* slot-side buffer size */
75: int round; /* slot-side block size */
76: int rate; /* slot-side sample rate */
77: int delta; /* pending clock ticks */
78: int delta_rem; /* remainder for delta */
79: int mode; /* MODE_{PLAY,REC} */
80: #define SLOT_INIT 0 /* not trying to do anything */
81: #define SLOT_START 1 /* buffer allocated */
82: #define SLOT_READY 2 /* buffer filled enough */
83: #define SLOT_RUN 3 /* buffer attached to device */
84: #define SLOT_STOP 4 /* draining */
85: int pstate;
86:
87: #define SLOT_NAMEMAX 8
88: char name[SLOT_NAMEMAX]; /* name matching [a-z]+ */
89: unsigned int unit; /* instance of name */
90: unsigned int serial; /* global unique number */
91: unsigned int vol; /* current (midi) volume */
1.21 ratchov 92: unsigned int id; /* process id */
1.1 ratchov 93: };
94:
1.12 ratchov 95: struct opt {
96: struct opt *next;
97: #define OPT_NAMEMAX 11
98: char name[OPT_NAMEMAX + 1];
99: int maxweight; /* max dynamic range for clients */
100: int pmin, pmax; /* play channels */
101: int rmin, rmax; /* recording channels */
102: int mmc; /* true if MMC control enabled */
103: int dup; /* true if join/expand enabled */
104: int mode; /* bitmap of MODE_XXX */
105: };
106:
1.1 ratchov 107: /*
108: * audio device with plenty of slots
109: */
110: struct dev {
111: struct dev *next;
112: struct slot *slot_list; /* audio streams attached */
1.12 ratchov 113: struct opt *opt_list;
1.1 ratchov 114: struct midi *midi;
115:
116: /*
117: * audio device (while opened)
1.10 ratchov 118: */
1.3 ratchov 119: struct dev_sio sio;
1.1 ratchov 120: struct aparams par; /* encoding */
121: int pchan, rchan; /* play & rec channels */
122: adata_t *rbuf; /* rec buffer */
123: adata_t *pbuf; /* array of play buffers */
124: #define DEV_PBUF(d) ((d)->pbuf + (d)->poffs * (d)->pchan)
125: int poffs; /* index of current play buf */
1.8 ratchov 126: int psize; /* size of play buffer */
1.1 ratchov 127: struct conv enc; /* native->device format */
128: struct conv dec; /* device->native format */
129: unsigned char *encbuf; /* buffer for encoding */
130: unsigned char *decbuf; /* buffer for decoding */
131:
132: /*
133: * preallocated audio sub-devices
134: */
135: #define DEV_NSLOT 8
136: struct slot slot[DEV_NSLOT];
137: unsigned int serial; /* for slot allocation */
1.5 ratchov 138:
139: /*
140: * current position, relative to the current cycle
141: */
142: int delta;
1.1 ratchov 143:
144: /*
145: * desired parameters
146: */
147: unsigned int reqmode; /* mode */
148: struct aparams reqpar; /* parameters */
149: int reqpchan, reqrchan; /* play & rec chans */
150: unsigned int reqbufsz; /* buffer size */
151: unsigned int reqround; /* block size */
152: unsigned int reqrate; /* sample rate */
153: unsigned int hold; /* hold the device open ? */
154: unsigned int autovol; /* auto adjust playvol ? */
155: unsigned int refcnt; /* number of openers */
156: #define DEV_NMAX 16 /* max number of devices */
157: unsigned int num; /* device serial number */
158: #define DEV_CFG 0 /* closed */
159: #define DEV_INIT 1 /* stopped */
1.2 ratchov 160: #define DEV_RUN 2 /* playin & recording */
1.1 ratchov 161: unsigned int pstate; /* one of above */
1.22 ! ratchov 162: struct name *path_list;
1.1 ratchov 163:
164: /*
165: * actual parameters and runtime state (i.e. once opened)
166: */
167: unsigned int mode; /* bitmap of MODE_xxx */
168: unsigned int bufsz, round, rate;
169: unsigned int prime;
170:
171: /*
172: * MIDI time code (MTC)
173: */
174: struct {
175: unsigned int origin; /* MTC start time */
176: unsigned int fps; /* MTC frames per second */
177: #define MTC_FPS_24 0
178: #define MTC_FPS_25 1
179: #define MTC_FPS_30 3
180: unsigned int fps_id; /* one of above */
181: unsigned int hr; /* MTC hours */
182: unsigned int min; /* MTC minutes */
183: unsigned int sec; /* MTC seconds */
184: unsigned int fr; /* MTC frames */
185: unsigned int qfr; /* MTC quarter frames */
186: int delta; /* rel. to the last MTC tick */
187: int refs;
188: } mtc;
189:
190: /*
191: * MIDI machine control (MMC)
192: */
193: #define MMC_STOP 1 /* stopped, can't start */
194: #define MMC_START 2 /* attempting to start */
195: #define MMC_RUN 3 /* started */
196: unsigned int tstate; /* one of above */
197: unsigned int master; /* master volume controller */
198: };
199:
200: extern struct dev *dev_list;
201:
202: void dev_log(struct dev *);
203: void dev_close(struct dev *);
1.22 ! ratchov 204: int dev_reopen(struct dev *);
1.1 ratchov 205: struct dev *dev_new(char *, struct aparams *, unsigned int, unsigned int,
206: unsigned int, unsigned int, unsigned int, unsigned int);
207: struct dev *dev_bynum(int);
208: void dev_del(struct dev *);
1.11 ratchov 209: void dev_adjpar(struct dev *, int, int, int);
1.1 ratchov 210: int dev_init(struct dev *);
211: void dev_done(struct dev *);
1.9 ratchov 212: int dev_ref(struct dev *);
213: void dev_unref(struct dev *);
1.1 ratchov 214: int dev_getpos(struct dev *);
215: unsigned int dev_roundof(struct dev *, unsigned int);
216:
217: /*
218: * interface to hardware device
219: */
220: void dev_onmove(struct dev *, int);
221: void dev_cycle(struct dev *);
222:
223: /*
224: * midi & midi call-backs
225: */
226: void dev_mmcstart(struct dev *);
227: void dev_mmcstop(struct dev *);
228: void dev_mmcloc(struct dev *, unsigned int);
229: void dev_master(struct dev *, unsigned int);
230: void dev_midi_vol(struct dev *, struct slot *);
231:
232: /*
233: * sio_open(3) like interface for clients
234: */
235: void slot_log(struct slot *);
1.21 ratchov 236: struct slot *slot_new(struct dev *, struct opt *, unsigned int, char *,
1.14 ratchov 237: struct slotops *, void *, int);
1.1 ratchov 238: void slot_del(struct slot *);
239: void slot_setvol(struct slot *, unsigned int);
240: void slot_start(struct slot *);
241: void slot_stop(struct slot *);
242: void slot_read(struct slot *);
243: void slot_write(struct slot *);
244:
245: #endif /* !defined(DEV_H) */
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