Annotation of src/usr.bin/aucat/aproc.h, Revision 1.25
1.25 ! ratchov 1: /* $OpenBSD: aproc.h,v 1.24 2009/10/06 18:06:55 ratchov Exp $ */
1.1 ratchov 2: /*
3: * Copyright (c) 2008 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 APROC_H
18: #define APROC_H
19:
20: #include <sys/queue.h>
21:
22: #include "aparams.h"
1.17 ratchov 23: #include "file.h"
1.1 ratchov 24:
25: struct abuf;
26: struct aproc;
27: struct file;
28:
29: struct aproc_ops {
30: /*
31: * Name of the ops structure, ie type of the unit.
32: */
33: char *name;
34:
35: /*
36: * The state of the given input abuf changed (eg. an input block
37: * is ready for processing). This function must get the block
38: * from the input, process it and remove it from the buffer.
39: *
40: * Processing the block will result in a change of the state of
41: * OTHER buffers that are attached to the aproc (eg. the output
42: * buffer was filled), thus this routine MUST notify ALL aproc
43: * structures that are waiting on it; most of the time this
44: * means just calling abuf_flush() on the output buffer.
45: */
46: int (*in)(struct aproc *, struct abuf *);
47:
48: /*
49: * The state of the given output abuf changed (eg. space for a
50: * new output block was made available) so processing can
51: * continue. This function must process more input in order to
52: * fill the output block.
53: *
54: * Producing a block will result in the change of the state of
55: * OTHER buffers that are attached to the aproc, thus this
56: * routine MUST notify ALL aproc structures that are waiting on
57: * it; most of the time this means calling abuf_fill() on the
58: * source buffers.
59: *
60: * Before filling input buffers (using abuf_fill()), this
61: * routine must ALWAYS check for eof condition, and if needed,
62: * handle it appropriately and call abuf_hup() to free the input
63: * buffer.
64: */
65: int (*out)(struct aproc *, struct abuf *);
66:
67: /*
68: * The input buffer is empty and we can no more receive data
69: * from it. The buffer will be destroyed as soon as this call
70: * returns so the abuf pointer will stop being valid after this
71: * call returns. There's no need to drain the buffer because the
72: * in() call-back was just called before.
73: *
74: * If this call reads and/or writes data on other buffers,
75: * abuf_flush() and abuf_fill() must be called appropriately.
76: */
77: void (*eof)(struct aproc *, struct abuf *);
78:
79: /*
80: * The output buffer can no more accept data (it should be
81: * considered as full). After this function returns, it will be
82: * destroyed and the "abuf" pointer will be no more valid.
83: */
84: void (*hup)(struct aproc *, struct abuf *);
85:
86: /*
87: * A new input was connected.
88: */
89: void (*newin)(struct aproc *, struct abuf *);
90:
91: /*
92: * A new output was connected
93: */
94: void (*newout)(struct aproc *, struct abuf *);
1.3 ratchov 95:
96: /*
1.6 ratchov 97: * Real-time record position changed (for input buffer),
1.18 ratchov 98: * by the given amount of _frames_.
1.6 ratchov 99: */
100: void (*ipos)(struct aproc *, struct abuf *, int);
101:
102: /*
103: * Real-time play position changed (for output buffer),
1.18 ratchov 104: * by the given amount of _frames_.
1.6 ratchov 105: */
106: void (*opos)(struct aproc *, struct abuf *, int);
107:
108: /*
1.18 ratchov 109: * Destroy the aproc, called just before to free the
110: * aproc structure.
1.3 ratchov 111: */
112: void (*done)(struct aproc *);
1.1 ratchov 113: };
114:
115: /*
116: * The aproc structure represents a simple audio processing unit; they are
117: * interconnected by abuf structures and form a kind of "circuit". The circuit
118: * cannot have loops.
119: */
120: struct aproc {
121: char *name; /* for debug purposes */
122: struct aproc_ops *ops; /* call-backs */
123: LIST_HEAD(, abuf) ibuflist; /* list of inputs */
124: LIST_HEAD(, abuf) obuflist; /* list of outputs */
1.15 ratchov 125: unsigned refs; /* extern references */
1.24 ratchov 126: unsigned zomb; /* destroyed but not freed */
1.1 ratchov 127: union { /* follow type-specific data */
128: struct { /* file/device io */
129: struct file *file; /* file to read/write */
130: } io;
131: struct {
1.4 ratchov 132: #define MIX_DROP 1
133: #define MIX_AUTOQUIT 2
1.6 ratchov 134: unsigned flags; /* bit mask of above */
1.12 ratchov 135: unsigned idle; /* frames since idleing */
1.6 ratchov 136: int lat; /* current latency */
137: int maxlat; /* max latency allowed*/
1.2 ratchov 138: } mix;
139: struct {
1.4 ratchov 140: #define SUB_DROP 1
141: #define SUB_AUTOQUIT 2
1.12 ratchov 142: unsigned idle; /* frames since idleing */
1.6 ratchov 143: unsigned flags; /* bit mask of above */
144: int lat; /* current latency */
145: int maxlat; /* max latency allowed*/
1.2 ratchov 146: } sub;
1.7 ratchov 147: struct {
1.14 ratchov 148: #define RESAMP_NCTX 2
149: unsigned ctx_start;
150: short ctx[NCHAN_MAX * RESAMP_NCTX];
1.13 ratchov 151: unsigned iblksz, oblksz;
1.14 ratchov 152: int diff;
1.16 ratchov 153: int idelta, odelta; /* remainder of resamp_[io]pos */
1.7 ratchov 154: } resamp;
1.9 ratchov 155: struct {
156: short ctx[NCHAN_MAX];
157: } cmap;
1.11 ratchov 158: struct {
159: int bfirst; /* bytes to skip at startup */
160: unsigned bps; /* bytes per sample */
161: unsigned shift; /* shift to get 32bit MSB */
162: int sigbit; /* sign bits to XOR */
163: int bnext; /* to reach the next byte */
164: int snext; /* to reach the next sample */
165: } conv;
1.17 ratchov 166: struct {
167: struct abuf *owner; /* current input stream */
168: struct timo timo; /* timout for throtteling */
1.25 ! ratchov 169: #define THRU_AUTOQUIT 1
! 170: unsigned flags; /* bit mask of above */
1.17 ratchov 171: } thru;
1.19 ratchov 172: struct {
173: #define CTL_NSLOT 8
174: #define CTL_NAMEMAX 8
1.21 ratchov 175: unsigned serial;
1.19 ratchov 176: struct ctl_slot {
1.20 ratchov 177: void (*cb)(void *, unsigned);
178: void *arg;
1.19 ratchov 179: unsigned unit;
180: char name[CTL_NAMEMAX];
1.21 ratchov 181: unsigned serial;
1.22 ratchov 182: unsigned vol;
1.19 ratchov 183: } slot[CTL_NSLOT];
184: } ctl;
1.1 ratchov 185: } u;
186: };
187:
1.3 ratchov 188: struct aproc *aproc_new(struct aproc_ops *, char *);
1.1 ratchov 189: void aproc_del(struct aproc *);
1.23 ratchov 190: void aproc_dbg(struct aproc *);
1.1 ratchov 191: void aproc_setin(struct aproc *, struct abuf *);
192: void aproc_setout(struct aproc *, struct abuf *);
1.17 ratchov 193: int aproc_depend(struct aproc *, struct aproc *);
1.1 ratchov 194:
195: struct aproc *rpipe_new(struct file *);
1.3 ratchov 196: int rpipe_in(struct aproc *, struct abuf *);
197: int rpipe_out(struct aproc *, struct abuf *);
198: void rpipe_done(struct aproc *);
199: void rpipe_eof(struct aproc *, struct abuf *);
200: void rpipe_hup(struct aproc *, struct abuf *);
201:
1.1 ratchov 202: struct aproc *wpipe_new(struct file *);
1.3 ratchov 203: void wpipe_done(struct aproc *);
204: int wpipe_in(struct aproc *, struct abuf *);
205: int wpipe_out(struct aproc *, struct abuf *);
206: void wpipe_eof(struct aproc *, struct abuf *);
207: void wpipe_hup(struct aproc *, struct abuf *);
208:
1.6 ratchov 209: struct aproc *mix_new(char *, int);
210: struct aproc *sub_new(char *, int);
1.13 ratchov 211: struct aproc *resamp_new(char *, unsigned, unsigned);
1.9 ratchov 212: struct aproc *cmap_new(char *, struct aparams *, struct aparams *);
1.11 ratchov 213: struct aproc *enc_new(char *, struct aparams *);
214: struct aproc *dec_new(char *, struct aparams *);
1.5 ratchov 215:
216: void mix_pushzero(struct aproc *);
217: void mix_setmaster(struct aproc *);
1.12 ratchov 218: void mix_clear(struct aproc *);
219: void sub_clear(struct aproc *);
1.1 ratchov 220:
1.11 ratchov 221: #endif /* !defined(APROC_H) */
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