![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to sound.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [UNIX Amiga Emulator] / uae / src / sd-file|
Return to sound.c CVS log | Up to [UNIX Amiga Emulator] / uae / src / sd-file |
1.1 root 1: /*
2: * UAE - The Un*x Amiga Emulator
3: *
4: * Support for Linux/USS sound
5: *
6: * Copyright 1997 Bernd Schmidt
7: */
8:
9: #include "sysconfig.h"
10: #include "sysdeps.h"
11:
12: #include "config.h"
13: #include "options.h"
14: #include "memory.h"
15: #include "custom.h"
16: #include "audio.h"
17: #include "gensound.h"
18: #include "sounddep/sound.h"
19: #include "events.h"
20:
21: #include <sys/ioctl.h>
22: #include <sys/soundcard.h>
23:
24: int sound_fd;
25: static int have_sound;
26: static unsigned long formats;
27:
28: unsigned long sndbuf_written;
29:
30: uae_u16 sndbuffer[44100];
31: uae_u16 *sndbufpt;
32: int sndbufsize;
33:
34: static int exact_log2(int v)
35: {
36: int l = 0;
37: while ((v >>= 1) != 0)
38: l++;
39: return l;
40: }
41:
42: void close_sound(void)
43: {
44: int t;
45: uae_u32 v;
46: char buf[4];
47:
48: if (!have_sound)
49: return;
50:
51: t = 0;
52: v = sndbuf_written;
53: buf[t] = v & 255;
54: buf[t+1] = (v>>8) & 255;
55: buf[t+2] = (v>>16) & 255;
56: buf[t+3] = (v>>24) & 255;
57: lseek (sound_fd, 40, SEEK_SET);
58: write (sound_fd, buf, 4);
59:
60: v += 36;
61: buf[t] = v & 255;
62: buf[t+1] = (v>>8) & 255;
63: buf[t+2] = (v>>16) & 255;
64: buf[t+3] = (v>>24) & 255;
65: lseek (sound_fd, 4, SEEK_SET);
66: write (sound_fd, buf, 4);
67:
68: close(sound_fd);
69: }
70:
71: int setup_sound(void)
72: {
73: sound_fd = open ("sound.output", O_CREAT|O_TRUNC|O_WRONLY, 0666);
74: have_sound = !(sound_fd < 0);
75: if (!have_sound)
76: return 0;
77:
78: sound_available = 1;
79: return 1;
80: }
81:
82: int init_sound (void)
83: {
84: int t;
85: uae_u32 v;
86: int tmp;
87:
88: char buf[200] = "RIFF WAVEfmt data ";
89:
90: /* Prepare a .WAV header */
91: sndbuf_written = 44;
92: t = 16; v = 16;
93: buf[t] = v & 255;
94: buf[t+1] = (v>>8) & 255;
95: buf[t+2] = (v>>16) & 255;
96: buf[t+3] = (v>>24) & 255;
97:
98: t = 20; v = 0x00010001 + (currprefs.stereo ? 0x10000 : 0);
99: buf[t] = v & 255;
100: buf[t+1] = (v>>8) & 255;
101: buf[t+2] = (v>>16) & 255;
102: buf[t+3] = (v>>24) & 255;
103:
104: t = 24; v = currprefs.sound_freq;
105: buf[t] = v & 255;
106: buf[t+1] = (v>>8) & 255;
107: buf[t+2] = (v>>16) & 255;
108: buf[t+3] = (v>>24) & 255;
109: t = 32; v = ((currprefs.sound_bits == 8 ? 1 : 2)
110: * (currprefs.stereo ? 2 : 1)) + 65536*currprefs.sound_bits;
111: buf[t] = v & 255;
112: buf[t+1] = (v>>8) & 255;
113: buf[t+2] = (v>>16) & 255;
114: buf[t+3] = (v>>24) & 255;
115: t = 28; v = (currprefs.sound_freq * (currprefs.sound_bits == 8 ? 1 : 2)
116: * (currprefs.stereo ? 2 : 1));
117: buf[t] = v & 255;
118: buf[t+1] = (v>>8) & 255;
119: buf[t+2] = (v>>16) & 255;
120: buf[t+3] = (v>>24) & 255;
121: write (sound_fd, buf, 44);
122:
123: sample_evtime = (long)maxhpos * maxvpos * 50 / currprefs.sound_freq;
124:
125: if (currprefs.sound_bits == 16) {
126: init_sound_table16 ();
127: eventtab[ev_sample].handler = currprefs.stereo ? sample16s_handler : sample16_handler;
128: } else {
129: init_sound_table8 ();
130: eventtab[ev_sample].handler = currprefs.stereo ? sample8s_handler : sample8_handler;
131: }
132: sound_available = 1;
133: sndbufsize = 44100;
134: printf ("Writing sound into \"sound.output\"; %d bits at %d Hz\n",
135: currprefs.sound_bits, currprefs.sound_freq, sndbufsize);
136: sndbufpt = sndbuffer;
137: return 1;
138: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.