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1.1 root 1: /*
2: * UAE - The Un*x Amiga Emulator
3: *
4: * Support for the Silicon Graphics Audio Library (AL)
5: *
6: * Copyright 1998 Ari Heikkinen
7: */
8:
9: #include "sysconfig.h"
10: #include "sysdeps.h"
11:
12: #include "config.h"
13: #include "options.h"
14: #include "memory.h"
1.1.1.2 ! root 15: #include "events.h"
1.1 root 16: #include "custom.h"
17: #include "audio.h"
18: #include "gensound.h"
19: #include "sounddep/sound.h"
20:
21: #include <dmedia/audio.h>
22:
23: uae_u16 sndbuffer[88200];
24: uae_u16 *sndbufpt;
25: int sndblocksize;
26:
27: ALport al_port = 0;
28: int to_frames_divisor = 1;
29:
30: static double old_rate = 0;
31:
32: static ALport open_audio(char *name, int width, int channels, int buffers)
33: {
34: ALconfig alc;
35: ALport alp;
36:
37: if (channels <= 0 || buffers <= 0)
38: return 0;
39:
40: alc = alNewConfig();
41: if (!alc)
42: return 0;
43: if (alSetWidth(alc, width)) {
44: alFreeConfig(alc);
45: return 0;
46: }
47: if (alSetChannels(alc, channels)) {
48: alFreeConfig(alc);
49: return 0;
50: }
51: if (alSetQueueSize(alc, buffers)) {
52: alFreeConfig(alc);
53: return 0;
54: }
55: alp = alOpenPort(name, "w", alc);
56: alFreeConfig(alc);
57: return alp ? alp : 0;
58: }
59:
60: static double get_sample_rate(void)
61: {
62: ALpv alpv;
63:
64: alpv.param = AL_RATE;
65: if (alGetParams(AL_DEFAULT_OUTPUT, &alpv, 1) != 1)
66: return 0;
67: return alFixedToDouble(alpv.value.ll);
68: }
69:
70: static int set_sample_rate(double rate)
71: {
72: ALpv alpv[2];
73:
74: if (rate < 0)
75: return -1;
76: alpv[0].param = AL_MASTER_CLOCK;
77: alpv[0].value.i = AL_CRYSTAL_MCLK_TYPE;
78: alpv[1].param = AL_RATE;
79: alpv[1].value.ll = alDoubleToFixed(rate);
80: if (alSetParams(AL_DEFAULT_OUTPUT, alpv, 2) != 2)
81: return -1;
82: return 0;
83: }
84:
85: int init_sound(void)
86: {
87: int width = AL_SAMPLE_16;
88: /* if someone knows how to get 8bit sound working on SGI fix it and
89: use this instead of the line above...
90: int width = currprefs.sound_bits >= 12 ? AL_SAMPLE_16 : AL_SAMPLE_8;
91: */
92: int channels = currprefs.stereo ? 2 : 1;
93: int rate = currprefs.sound_freq;
94:
95: if (currprefs.sound_maxbsiz < 128 || currprefs.sound_maxbsiz > 44100) {
96: fprintf(stderr, "Sound buffer size %d out of range.\n",
97: currprefs.sound_maxbsiz);
98: currprefs.sound_maxbsiz = 8192;
99: }
100:
101: al_port = open_audio("UAE Sound", width, channels,
102: currprefs.sound_maxbsiz * 2);
103: if (!al_port) {
104: sound_available = 0;
105: return 0;
106: }
107:
108: old_rate = get_sample_rate();
109: if (old_rate <= 0 || set_sample_rate((double)rate)
110: || (rate = (int)get_sample_rate()) <= 0) {
111: alClosePort(al_port);
112: sound_available = 0;
113: return 0;
114: }
115:
1.1.1.2 ! root 116: scaled_sample_evtime = (unsigned long)maxhpos * maxvpos * vblank_hz * CYCLE_UNIT / rate;
! 117: scaled_sample_evtime_ok = 1;
1.1 root 118:
119: sndbufpt = sndbuffer;
120: if (width == AL_SAMPLE_16) {
121: sndblocksize = currprefs.sound_maxbsiz * channels * 2;
122: sample_handler = currprefs.stereo
123: ? sample16s_handler
124: : sample16_handler;
125: to_frames_divisor = channels * 2;
126: init_sound_table16();
127: } else {
128: sndblocksize = currprefs.sound_maxbsiz * channels;
129: sample_handler = currprefs.stereo
130: ? sample8s_handler
131: : sample8_handler;
132: to_frames_divisor = channels;
133: init_sound_table8();
134: }
135: printf("Sound driver configured for %d bits (%s) at %d Hz, "
136: "buffer is %d bytes\n", width == AL_SAMPLE_16 ? 16 : 8,
137: channels == 2 ? "stereo" : "mono", rate, sndblocksize);
138: return 1;
139: }
140:
141: int setup_sound(void)
142: {
143: ALport alp;
144:
145: sound_available = 0;
146: alp = open_audio("UAE Sound (test)", AL_SAMPLE_16, 1, 44100);
147: if (!alp) {
148: printf("SetupSound failed - sound hardware unavailable.\n");
149: return 0;
150: }
151: sound_available = 1;
152: alClosePort(alp);
153: printf("SetupSound ok - sound hardware available.\n");
154: return 1;
155: }
156:
157: void close_sound(void)
158: {
159: if (old_rate > 0)
160: (void)set_sample_rate(old_rate);
161: if (al_port)
162: alClosePort(al_port);
163: printf("CloseSound ok\n");
164: }
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