Annotation of src/usr.bin/sndiod/dev.h, Revision 1.7
1.7 ! ratchov 1: /* $OpenBSD: dev.h,v 1.6 2014/03/07 10:15:39 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 */
1.1 ratchov 31: void (*onvol)(void *, unsigned int); /* tell client vol changed */
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 */
42: void *arg; /* user data for callbacks */
43: struct aparams par; /* socket side params */
44: struct {
45: int weight; /* dynamic range */
46: int maxweight; /* max dynamic range allowed */
47: unsigned int vol; /* volume within the vol */
48: struct abuf buf; /* socket side buffer */
49: int bpf; /* byte per frame */
50: int slot_cmin, slot_cmax; /* slot source chans */
51: int dev_cmin, dev_cmax; /* device destination chans */
52: struct cmap cmap; /* channel mapper state */
53: struct resamp resamp; /* resampler state */
54: struct conv dec; /* format decoder params */
55: int join; /* channel join factor */
56: int expand; /* channel expand factor */
57: void *resampbuf, *decbuf; /* tmp buffers */
58: } mix;
59: struct {
60: struct abuf buf; /* socket side buffer */
1.5 ratchov 61: int prime; /* initial cycles to skip */
1.1 ratchov 62: int bpf; /* byte per frame */
63: int slot_cmin, slot_cmax; /* slot destination chans */
64: int dev_cmin, dev_cmax; /* device source chans */
65: struct cmap cmap; /* channel mapper state */
66: struct resamp resamp; /* buffer for resampling */
67: struct conv enc; /* buffer for encoding */
68: int join; /* channel join factor */
69: int expand; /* channel expand factor */
70: void *resampbuf, *encbuf; /* tmp buffers */
71: } sub;
72: int xrun; /* underrun policy */
1.5 ratchov 73: int skip; /* cycles to skip (for xrun) */
1.1 ratchov 74: int dup; /* mono-to-stereo and alike */
75: #define SLOT_BUFSZ(s) \
76: ((s)->appbufsz + (s)->dev->bufsz / (s)->dev->round * (s)->round)
77: int appbufsz; /* slot-side buffer size */
78: int round; /* slot-side block size */
79: int rate; /* slot-side sample rate */
80: int delta; /* pending clock ticks */
81: int delta_rem; /* remainder for delta */
82: int mode; /* MODE_{PLAY,REC} */
83: #define SLOT_INIT 0 /* not trying to do anything */
84: #define SLOT_START 1 /* buffer allocated */
85: #define SLOT_READY 2 /* buffer filled enough */
86: #define SLOT_RUN 3 /* buffer attached to device */
87: #define SLOT_STOP 4 /* draining */
88: int pstate;
89:
90: #define SLOT_NAMEMAX 8
91: char name[SLOT_NAMEMAX]; /* name matching [a-z]+ */
92: unsigned int unit; /* instance of name */
93: unsigned int serial; /* global unique number */
94: unsigned int vol; /* current (midi) volume */
95: unsigned int tstate; /* mmc state */
96: };
97:
98: /*
99: * audio device with plenty of slots
100: */
101: struct dev {
102: struct dev *next;
103: struct slot *slot_list; /* audio streams attached */
104: struct midi *midi;
105:
106: /*
107: * audio device (while opened)
108: */
1.3 ratchov 109: struct dev_sio sio;
1.1 ratchov 110: struct aparams par; /* encoding */
111: int pchan, rchan; /* play & rec channels */
112: adata_t *rbuf; /* rec buffer */
113: adata_t *pbuf; /* array of play buffers */
114: #define DEV_PBUF(d) ((d)->pbuf + (d)->poffs * (d)->pchan)
115: int poffs; /* index of current play buf */
116: struct conv enc; /* native->device format */
117: struct conv dec; /* device->native format */
118: unsigned char *encbuf; /* buffer for encoding */
119: unsigned char *decbuf; /* buffer for decoding */
120:
121: /*
122: * preallocated audio sub-devices
123: */
124: #define DEV_NSLOT 8
125: struct slot slot[DEV_NSLOT];
126: unsigned int serial; /* for slot allocation */
1.5 ratchov 127:
128: /*
129: * current position, relative to the current cycle
130: */
131: int delta;
1.1 ratchov 132:
133: /*
134: * desired parameters
135: */
136: unsigned int reqmode; /* mode */
137: struct aparams reqpar; /* parameters */
138: int reqpchan, reqrchan; /* play & rec chans */
139: unsigned int reqbufsz; /* buffer size */
140: unsigned int reqround; /* block size */
141: unsigned int reqrate; /* sample rate */
142: unsigned int hold; /* hold the device open ? */
143: unsigned int autovol; /* auto adjust playvol ? */
144: unsigned int refcnt; /* number of openers */
145: #define DEV_NMAX 16 /* max number of devices */
146: unsigned int num; /* device serial number */
147: #define DEV_CFG 0 /* closed */
148: #define DEV_INIT 1 /* stopped */
1.2 ratchov 149: #define DEV_RUN 2 /* playin & recording */
1.1 ratchov 150: unsigned int pstate; /* one of above */
151: char *path; /* sio path */
152:
153: /*
154: * actual parameters and runtime state (i.e. once opened)
155: */
156: unsigned int mode; /* bitmap of MODE_xxx */
157: unsigned int bufsz, round, rate;
158: unsigned int prime;
159:
160: /*
161: * MIDI time code (MTC)
162: */
163: struct {
164: unsigned int origin; /* MTC start time */
165: unsigned int fps; /* MTC frames per second */
166: #define MTC_FPS_24 0
167: #define MTC_FPS_25 1
168: #define MTC_FPS_30 3
169: unsigned int fps_id; /* one of above */
170: unsigned int hr; /* MTC hours */
171: unsigned int min; /* MTC minutes */
172: unsigned int sec; /* MTC seconds */
173: unsigned int fr; /* MTC frames */
174: unsigned int qfr; /* MTC quarter frames */
175: int delta; /* rel. to the last MTC tick */
176: int refs;
177: } mtc;
178:
179: /*
180: * MIDI machine control (MMC)
181: */
182: #define MMC_OFF 0 /* ignore MMC messages */
183: #define MMC_STOP 1 /* stopped, can't start */
184: #define MMC_START 2 /* attempting to start */
185: #define MMC_RUN 3 /* started */
186: unsigned int tstate; /* one of above */
187: unsigned int master; /* master volume controller */
188: };
189:
190: extern struct dev *dev_list;
191:
192: void dev_log(struct dev *);
193: void dev_close(struct dev *);
194: struct dev *dev_new(char *, struct aparams *, unsigned int, unsigned int,
195: unsigned int, unsigned int, unsigned int, unsigned int);
196: struct dev *dev_bynum(int);
197: void dev_del(struct dev *);
198: void dev_adjpar(struct dev *, int, int, int, int, int);
199: int dev_init(struct dev *);
200: void dev_done(struct dev *);
201: int dev_getpos(struct dev *);
202: unsigned int dev_roundof(struct dev *, unsigned int);
203:
204: /*
205: * interface to hardware device
206: */
207: void dev_onmove(struct dev *, int);
208: void dev_cycle(struct dev *);
209:
210: /*
211: * midi & midi call-backs
212: */
213: void dev_mmcstart(struct dev *);
214: void dev_mmcstop(struct dev *);
215: void dev_mmcloc(struct dev *, unsigned int);
216: void dev_master(struct dev *, unsigned int);
217: void dev_midi_vol(struct dev *, struct slot *);
218:
219: /*
220: * sio_open(3) like interface for clients
221: */
222: void slot_log(struct slot *);
223: struct slot *slot_new(struct dev *, char *, struct slotops *, void *, int);
224: void slot_del(struct slot *);
225: void slot_setvol(struct slot *, unsigned int);
226: void slot_start(struct slot *);
227: void slot_stop(struct slot *);
228: void slot_read(struct slot *);
229: void slot_write(struct slot *);
230:
231: #endif /* !defined(DEV_H) */
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