Annotation of src/usr.bin/sndiod/dev.h, Revision 1.1
1.1 ! ratchov 1: /* $OpenBSD$ */
! 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: {
! 30: void (*onmove)(void *, int); /* clock tick */
! 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 (*mmcstart)(void *); /* request to start */
! 36: void (*mmcstop)(void *); /* request to stop */
! 37: void (*mmcloc)(void *, unsigned int); /* relocate to new position */
! 38: void (*exit)(void *); /* delete client */
! 39: };
! 40:
! 41: struct slot {
! 42: struct slotops *ops; /* client callbacks */
! 43: struct slot *next; /* next on the play list */
! 44: struct dev *dev; /* device this belongs to */
! 45: void *arg; /* user data for callbacks */
! 46: struct aparams par; /* socket side params */
! 47: struct {
! 48: int weight; /* dynamic range */
! 49: int maxweight; /* max dynamic range allowed */
! 50: unsigned int vol; /* volume within the vol */
! 51: int drop; /* to drop on next read */
! 52: struct abuf buf; /* socket side buffer */
! 53: int bpf; /* byte per frame */
! 54: int slot_cmin, slot_cmax; /* slot source chans */
! 55: int dev_cmin, dev_cmax; /* device destination chans */
! 56: struct cmap cmap; /* channel mapper state */
! 57: struct resamp resamp; /* resampler state */
! 58: struct conv dec; /* format decoder params */
! 59: int join; /* channel join factor */
! 60: int expand; /* channel expand factor */
! 61: void *resampbuf, *decbuf; /* tmp buffers */
! 62: } mix;
! 63: struct {
! 64: int silence; /* to add on next write */
! 65: struct abuf buf; /* socket side buffer */
! 66: int bpf; /* byte per frame */
! 67: int slot_cmin, slot_cmax; /* slot destination chans */
! 68: int dev_cmin, dev_cmax; /* device source chans */
! 69: struct cmap cmap; /* channel mapper state */
! 70: struct resamp resamp; /* buffer for resampling */
! 71: struct conv enc; /* buffer for encoding */
! 72: int join; /* channel join factor */
! 73: int expand; /* channel expand factor */
! 74: void *resampbuf, *encbuf; /* tmp buffers */
! 75: } sub;
! 76: int xrun; /* underrun policy */
! 77: int dup; /* mono-to-stereo and alike */
! 78: #define SLOT_BUFSZ(s) \
! 79: ((s)->appbufsz + (s)->dev->bufsz / (s)->dev->round * (s)->round)
! 80: int appbufsz; /* slot-side buffer size */
! 81: int round; /* slot-side block size */
! 82: int rate; /* slot-side sample rate */
! 83: int delta; /* pending clock ticks */
! 84: int delta_rem; /* remainder for delta */
! 85: int mode; /* MODE_{PLAY,REC} */
! 86: #define SLOT_INIT 0 /* not trying to do anything */
! 87: #define SLOT_START 1 /* buffer allocated */
! 88: #define SLOT_READY 2 /* buffer filled enough */
! 89: #define SLOT_RUN 3 /* buffer attached to device */
! 90: #define SLOT_STOP 4 /* draining */
! 91: int pstate;
! 92:
! 93: #define SLOT_NAMEMAX 8
! 94: char name[SLOT_NAMEMAX]; /* name matching [a-z]+ */
! 95: unsigned int unit; /* instance of name */
! 96: unsigned int serial; /* global unique number */
! 97: unsigned int vol; /* current (midi) volume */
! 98: unsigned int tstate; /* mmc state */
! 99: };
! 100:
! 101: /*
! 102: * audio device with plenty of slots
! 103: */
! 104: struct dev {
! 105: struct dev *next;
! 106: struct slot *slot_list; /* audio streams attached */
! 107: struct midi *midi;
! 108:
! 109: /*
! 110: * audio device (while opened)
! 111: */
! 112: struct siofile_ sio;
! 113: struct aparams par; /* encoding */
! 114: int pchan, rchan; /* play & rec channels */
! 115: adata_t *rbuf; /* rec buffer */
! 116: adata_t *pbuf; /* array of play buffers */
! 117: #define DEV_PBUF(d) ((d)->pbuf + (d)->poffs * (d)->pchan)
! 118: int poffs; /* index of current play buf */
! 119: struct conv enc; /* native->device format */
! 120: struct conv dec; /* device->native format */
! 121: unsigned char *encbuf; /* buffer for encoding */
! 122: unsigned char *decbuf; /* buffer for decoding */
! 123:
! 124: /*
! 125: * preallocated audio sub-devices
! 126: */
! 127: #define DEV_NSLOT 8
! 128: struct slot slot[DEV_NSLOT];
! 129: unsigned int serial; /* for slot allocation */
! 130:
! 131: /*
! 132: * desired parameters
! 133: */
! 134: unsigned int reqmode; /* mode */
! 135: struct aparams reqpar; /* parameters */
! 136: int reqpchan, reqrchan; /* play & rec chans */
! 137: unsigned int reqbufsz; /* buffer size */
! 138: unsigned int reqround; /* block size */
! 139: unsigned int reqrate; /* sample rate */
! 140: unsigned int hold; /* hold the device open ? */
! 141: unsigned int autovol; /* auto adjust playvol ? */
! 142: unsigned int autostart; /* don't wait for MMC start */
! 143: unsigned int refcnt; /* number of openers */
! 144: #define DEV_NMAX 16 /* max number of devices */
! 145: unsigned int num; /* device serial number */
! 146: #define DEV_CFG 0 /* closed */
! 147: #define DEV_INIT 1 /* stopped */
! 148: #define DEV_RUN 3 /* playin & recording */
! 149: unsigned int pstate; /* one of above */
! 150: char *path; /* sio path */
! 151:
! 152: /*
! 153: * actual parameters and runtime state (i.e. once opened)
! 154: */
! 155: unsigned int mode; /* bitmap of MODE_xxx */
! 156: unsigned int bufsz, round, rate;
! 157: unsigned int prime;
! 158:
! 159: /*
! 160: * MIDI time code (MTC)
! 161: */
! 162: struct {
! 163: unsigned int origin; /* MTC start time */
! 164: unsigned int fps; /* MTC frames per second */
! 165: #define MTC_FPS_24 0
! 166: #define MTC_FPS_25 1
! 167: #define MTC_FPS_30 3
! 168: unsigned int fps_id; /* one of above */
! 169: unsigned int hr; /* MTC hours */
! 170: unsigned int min; /* MTC minutes */
! 171: unsigned int sec; /* MTC seconds */
! 172: unsigned int fr; /* MTC frames */
! 173: unsigned int qfr; /* MTC quarter frames */
! 174: int delta; /* rel. to the last MTC tick */
! 175: int refs;
! 176: } mtc;
! 177:
! 178: /*
! 179: * MIDI machine control (MMC)
! 180: */
! 181: #define MMC_OFF 0 /* ignore MMC messages */
! 182: #define MMC_STOP 1 /* stopped, can't start */
! 183: #define MMC_START 2 /* attempting to start */
! 184: #define MMC_RUN 3 /* started */
! 185: unsigned int tstate; /* one of above */
! 186: unsigned int master; /* master volume controller */
! 187: };
! 188:
! 189: extern struct dev *dev_list;
! 190:
! 191: void dev_log(struct dev *);
! 192: void dev_close(struct dev *);
! 193: struct dev *dev_new(char *, struct aparams *, unsigned int, unsigned int,
! 194: unsigned int, unsigned int, unsigned int, unsigned int);
! 195: struct dev *dev_bynum(int);
! 196: void dev_del(struct dev *);
! 197: void dev_adjpar(struct dev *, int, int, int, int, int);
! 198: int dev_init(struct dev *);
! 199: void dev_done(struct dev *);
! 200: int dev_getpos(struct dev *);
! 201: unsigned int dev_roundof(struct dev *, unsigned int);
! 202:
! 203: /*
! 204: * interface to hardware device
! 205: */
! 206: void dev_onmove(struct dev *, int);
! 207: void dev_cycle(struct dev *);
! 208:
! 209: /*
! 210: * midi & midi call-backs
! 211: */
! 212: void dev_mmcstart(struct dev *);
! 213: void dev_mmcstop(struct dev *);
! 214: void dev_mmcloc(struct dev *, unsigned int);
! 215: void dev_master(struct dev *, unsigned int);
! 216: void dev_midi_vol(struct dev *, struct slot *);
! 217:
! 218: /*
! 219: * sio_open(3) like interface for clients
! 220: */
! 221: void slot_log(struct slot *);
! 222: struct slot *slot_new(struct dev *, char *, struct slotops *, void *, int);
! 223: void slot_del(struct slot *);
! 224: void slot_setvol(struct slot *, unsigned int);
! 225: void slot_start(struct slot *);
! 226: void slot_stop(struct slot *);
! 227: void slot_read(struct slot *);
! 228: void slot_write(struct slot *);
! 229:
! 230: #endif /* !defined(DEV_H) */
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