1 /*
2 snd_sun.c
3
4 (description)
5
6 Copyright (C) 1996-1997 Id Software, Inc.
7 Copyright (C) 1999,2000 contributors of the QuakeForge project
8 Please see the file "AUTHORS" for a list of contributors
9
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License
12 as published by the Free Software Foundation; either version 2
13 of the License, or (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
18
19 See the GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to:
23
24 Free Software Foundation, Inc.
25 59 Temple Place - Suite 330
26 Boston, MA 02111-1307, USA
27
28 */
29 #ifdef HAVE_CONFIG_H
30 # include "config.h"
31 #endif
32
33 #ifdef HAVE_UNISTD_H
34 # include <unistd.h>
35 #endif
36 #ifdef HAVE_STRING_H
37 # include <string.h>
38 #endif
39 #ifdef HAVE_STRINGS_H
40 # include <strings.h>
41 #endif
42
43 #include <errno.h>
44 #include <fcntl.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <sys/audioio.h>
48 #include <sys/ioctl.h>
49 #include <sys/mman.h>
50 #include <sys/shm.h>
51 #include <sys/types.h>
52 #include <sys/wait.h>
53
54 #include "QF/qargs.h"
55 #include "QF/qtypes.h"
56 #include "QF/sys.h"
57
58 #include "snd_internal.h"
59
60 static int audio_fd;
61 static int snd_inited;
62 static int snd_blocked = 0;
63
64 static unsigned int wbufp;
65 static audio_info_t info;
66
67 #define BUFFER_SIZE 8192
68
69 static unsigned char dma_buffer[BUFFER_SIZE];
70 static volatile dma_t sn;
71
72 static plugin_t plugin_info;
73 static plugin_data_t plugin_info_data;
74 static plugin_funcs_t plugin_info_funcs;
75 static general_data_t plugin_info_general_data;
76 static general_funcs_t plugin_info_general_funcs;
77 static snd_output_data_t plugin_info_sound_data;
78 static snd_output_funcs_t plugin_info_sound_funcs;
79
80 static void
SNDDMA_Init_Cvars(void)81 SNDDMA_Init_Cvars (void)
82 {
83 }
84
85 static volatile dma_t *
SNDDMA_Init(void)86 SNDDMA_Init (void)
87 {
88 if (snd_inited) {
89 Sys_Printf ("Sound already init'd\n");
90 return 0;
91 }
92
93 audio_fd = open ("/dev/audio", O_WRONLY | O_NDELAY);
94
95 if (audio_fd < 0) {
96 if (errno == EBUSY) {
97 Sys_Printf ("Audio device is being used by another process\n");
98 }
99 perror ("/dev/audio");
100 Sys_Printf ("Could not open /dev/audio\n");
101 return (0);
102 }
103
104 if (ioctl (audio_fd, AUDIO_GETINFO, &info) < 0) {
105 perror ("/dev/audio");
106 Sys_Printf ("Could not communicate with audio device.\n");
107 close (audio_fd);
108 return 0;
109 }
110 // set to nonblock
111 if (fcntl (audio_fd, F_SETFL, O_NONBLOCK) < 0) {
112 perror ("/dev/audio");
113 close (audio_fd);
114 return 0;
115 }
116
117 AUDIO_INITINFO (&info);
118
119 sn.speed = 11025;
120
121 // try 16 bit stereo
122 info.play.encoding = AUDIO_ENCODING_LINEAR;
123 info.play.sample_rate = 11025;
124 info.play.channels = 2;
125 info.play.precision = 16;
126
127 if (ioctl (audio_fd, AUDIO_SETINFO, &info) < 0) {
128 info.play.encoding = AUDIO_ENCODING_LINEAR;
129 info.play.sample_rate = 11025;
130 info.play.channels = 1;
131 info.play.precision = 16;
132 if (ioctl (audio_fd, AUDIO_SETINFO, &info) < 0) {
133 Sys_Printf ("Incapable sound hardware.\n");
134 close (audio_fd);
135 return 0;
136 }
137 Sys_Printf ("16 bit mono sound initialized\n");
138 sn.samplebits = 16;
139 sn.channels = 1;
140 } else { // 16 bit stereo
141 Sys_Printf ("16 bit stereo sound initialized\n");
142 sn.samplebits = 16;
143 sn.channels = 2;
144 }
145
146 sn.frames = sizeof (dma_buffer) / (sn.samplebits / 8);
147 sn.framepos = 0;
148 sn.submission_chunk = 1;
149 sn.buffer = (unsigned char *) dma_buffer;
150
151 snd_inited = 1;
152
153 return &sn;
154 }
155
156 static int
SNDDMA_GetDMAPos(void)157 SNDDMA_GetDMAPos (void)
158 {
159 if (!snd_inited)
160 return (0);
161
162 if (ioctl (audio_fd, AUDIO_GETINFO, &info) < 0) {
163 perror ("/dev/audio");
164 Sys_Printf ("Could not communicate with audio device.\n");
165 close (audio_fd);
166 snd_inited = 0;
167 return (0);
168 }
169
170 sn.framepos = ((info.play.samples * sn.channels) % sn.frames);
171 return sn.framepos;
172 }
173 #if 0
174 static int
175 SNDDMA_GetSamples (void)
176 {
177 if (!snd_inited)
178 return (0);
179
180 if (ioctl (audio_fd, AUDIO_GETINFO, &info) < 0) {
181 perror ("/dev/audio");
182 Sys_Printf ("Could not communicate with audio device.\n");
183 close (audio_fd);
184 snd_inited = 0;
185 return (0);
186 }
187
188 return info.play.samples;
189 }
190 #endif
191 static void
SNDDMA_Shutdown(void)192 SNDDMA_Shutdown (void)
193 {
194 if (snd_inited) {
195 close (audio_fd);
196 snd_inited = 0;
197 }
198 }
199
200 /*
201 SNDDMA_Submit
202
203 Send sound to device if buffer isn't really the dma buffer
204 */
205 static void
SNDDMA_Submit(void)206 SNDDMA_Submit (void)
207 {
208 unsigned char *p;
209 static unsigned char writebuf[1024];
210 int bsize, bytes, idx, b;
211 int stop = *plugin_info_sound_data.paintedtime;
212
213 if (snd_blocked)
214 return;
215
216 if (*plugin_info_sound_data.paintedtime < wbufp)
217 wbufp = 0; // reset
218
219 bsize = sn.channels * (sn.samplebits / 8);
220 bytes = (*plugin_info_sound_data.paintedtime - wbufp) * bsize;
221
222 if (!bytes)
223 return;
224
225 if (bytes > (int) sizeof (writebuf)) {
226 bytes = sizeof (writebuf);
227 stop = wbufp + bytes / bsize;
228 }
229
230 p = writebuf;
231 idx = (wbufp * bsize) & (BUFFER_SIZE - 1);
232
233 for (b = bytes; b; b--) {
234 *p++ = dma_buffer[idx];
235 idx = (idx + 1) & (BUFFER_SIZE - 1);
236 }
237
238 wbufp = stop;
239
240 if (write (audio_fd, writebuf, bytes) < bytes)
241 Sys_Printf ("audio can't keep up!\n");
242
243 }
244
245 static void
SNDDMA_BlockSound(void)246 SNDDMA_BlockSound (void)
247 {
248 ++snd_blocked;
249 }
250
251 static void
SNDDMA_UnblockSound(void)252 SNDDMA_UnblockSound (void)
253 {
254 if (!snd_blocked)
255 return;
256 --snd_blocked;
257 }
258
PLUGIN_INFO(snd_output,sun)259 PLUGIN_INFO(snd_output, sun)
260 {
261 plugin_info.type = qfp_snd_output;
262 plugin_info.api_version = QFPLUGIN_VERSION;
263 plugin_info.plugin_version = "0.1";
264 plugin_info.description = "SUN digital output";
265 plugin_info.copyright = "Copyright (C) 1996-1997 id Software, Inc.\n"
266 "Copyright (C) 1999,2000,2001 contributors of the QuakeForge "
267 "project\n"
268 "Please see the file \"AUTHORS\" for a list of contributors";
269 plugin_info.functions = &plugin_info_funcs;
270 plugin_info.data = &plugin_info_data;
271
272 plugin_info_data.general = &plugin_info_general_data;
273 plugin_info_data.input = NULL;
274 plugin_info_data.snd_output = &plugin_info_sound_data;
275
276 plugin_info_funcs.general = &plugin_info_general_funcs;
277 plugin_info_funcs.input = NULL;
278 plugin_info_funcs.snd_output = &plugin_info_sound_funcs;
279
280 plugin_info_general_funcs.p_Init = SNDDMA_Init_Cvars;
281 plugin_info_general_funcs.p_Shutdown = NULL;
282
283 plugin_info_sound_funcs.pS_O_Init = SNDDMA_Init;
284 plugin_info_sound_funcs.pS_O_Shutdown = SNDDMA_Shutdown;
285 plugin_info_sound_funcs.pS_O_GetDMAPos = SNDDMA_GetDMAPos;
286 plugin_info_sound_funcs.pS_O_Submit = SNDDMA_Submit;
287 plugin_info_sound_funcs.pS_O_BlockSound = SNDDMA_BlockSound;
288 plugin_info_sound_funcs.pS_O_UnblockSound = SNDDMA_UnblockSound;
289
290 return &plugin_info;
291 }
292