This source file includes following definitions.
- speakup_start_ttys
- speakup_stop_ttys
- synth_buffer_free
- synth_buffer_empty
- synth_buffer_add
- synth_buffer_getc
- synth_buffer_peek
- synth_buffer_skip_nonlatin1
- synth_buffer_clear
1
2 #include <linux/console.h>
3 #include <linux/types.h>
4 #include <linux/wait.h>
5
6 #include "speakup.h"
7 #include "spk_priv.h"
8
9 #define SYNTH_BUF_SIZE 8192
10
11 static u16 synth_buffer[SYNTH_BUF_SIZE];
12 static u16 *buff_in = synth_buffer;
13 static u16 *buff_out = synth_buffer;
14 static u16 *buffer_end = synth_buffer + SYNTH_BUF_SIZE - 1;
15
16
17
18
19
20
21
22
23
24 void speakup_start_ttys(void)
25 {
26 int i;
27
28 for (i = 0; i < MAX_NR_CONSOLES; i++) {
29 if (speakup_console[i] && speakup_console[i]->tty_stopped)
30 continue;
31 if (vc_cons[i].d && vc_cons[i].d->port.tty)
32 start_tty(vc_cons[i].d->port.tty);
33 }
34 }
35 EXPORT_SYMBOL_GPL(speakup_start_ttys);
36
37 static void speakup_stop_ttys(void)
38 {
39 int i;
40
41 for (i = 0; i < MAX_NR_CONSOLES; i++)
42 if (vc_cons[i].d && vc_cons[i].d->port.tty)
43 stop_tty(vc_cons[i].d->port.tty);
44 }
45
46 static int synth_buffer_free(void)
47 {
48 int chars_free;
49
50 if (buff_in >= buff_out)
51 chars_free = SYNTH_BUF_SIZE - (buff_in - buff_out);
52 else
53 chars_free = buff_out - buff_in;
54 return chars_free;
55 }
56
57 int synth_buffer_empty(void)
58 {
59 return (buff_in == buff_out);
60 }
61 EXPORT_SYMBOL_GPL(synth_buffer_empty);
62
63 void synth_buffer_add(u16 ch)
64 {
65 if (!synth->alive) {
66
67
68
69 return;
70 }
71 if (synth_buffer_free() <= 100) {
72 synth_start();
73 speakup_stop_ttys();
74 }
75 if (synth_buffer_free() <= 1)
76 return;
77 *buff_in++ = ch;
78 if (buff_in > buffer_end)
79 buff_in = synth_buffer;
80
81
82
83 spk_paused = false;
84 }
85
86 u16 synth_buffer_getc(void)
87 {
88 u16 ch;
89
90 if (buff_out == buff_in)
91 return 0;
92 ch = *buff_out++;
93 if (buff_out > buffer_end)
94 buff_out = synth_buffer;
95 return ch;
96 }
97 EXPORT_SYMBOL_GPL(synth_buffer_getc);
98
99 u16 synth_buffer_peek(void)
100 {
101 if (buff_out == buff_in)
102 return 0;
103 return *buff_out;
104 }
105 EXPORT_SYMBOL_GPL(synth_buffer_peek);
106
107 void synth_buffer_skip_nonlatin1(void)
108 {
109 while (buff_out != buff_in) {
110 if (*buff_out < 0x100)
111 return;
112 buff_out++;
113 if (buff_out > buffer_end)
114 buff_out = synth_buffer;
115 }
116 }
117 EXPORT_SYMBOL_GPL(synth_buffer_skip_nonlatin1);
118
119 void synth_buffer_clear(void)
120 {
121 buff_in = synth_buffer;
122 buff_out = synth_buffer;
123 }
124 EXPORT_SYMBOL_GPL(synth_buffer_clear);