1 /* 2000-08-10T17:39:15Z
3 * handle sounds in emerald mine
6 #include "../libgame/platform.h"
9 #if defined(TARGET_X11)
11 #if defined(PLATFORM_LINUX) || defined(PLATFORM_BSD)
14 #include <sys/soundcard.h>
18 #include <soundcard.h>
22 #include <sys/types.h>
24 #include <sys/ioctl.h>
35 static char audioname[] = "/dev/audio";
37 static const int sound_priority[SAMPLE_MAX] = {
38 SAMPLE_exit, SAMPLE_die, SAMPLE_time, SAMPLE_boom, SAMPLE_tick,
39 SAMPLE_collect, SAMPLE_roll, SAMPLE_push, SAMPLE_dynamite, SAMPLE_press,
40 SAMPLE_door, SAMPLE_dirt, SAMPLE_blank, SAMPLE_android, SAMPLE_ball,
41 SAMPLE_grow, SAMPLE_squash, SAMPLE_crack, SAMPLE_slurp, SAMPLE_drip,
42 SAMPLE_wonder, SAMPLE_wheel, SAMPLE_stone, SAMPLE_spring, SAMPLE_diamond,
43 SAMPLE_nut, SAMPLE_bug, SAMPLE_tank, SAMPLE_eater, SAMPLE_alien,
47 int sound_thread(void)
49 int audio_fd; /* file descriptor of /dev/audio or -1 if not open */
53 unsigned char *audio_buffer; /* actual buffer pumped to /dev/audio */
56 char sound_play[SAMPLE_MAX]; /* if set, we should be playing these sounds */
57 long sound_pos[SAMPLE_MAX]; /* position in the sound */
58 int mix_play[MIXER_MAX]; /* which sounds we have chosen to mix (calculated each time) */
65 audio_format = AUDIO_ULAW; /* defaults for non-OSS /dev/audio */
72 memset(sound_play, 0, sizeof(sound_play)); /* not playing any sounds */
77 /* pick sounds to play, if any */
78 if(sound_play[SAMPLE_exit] || sound_play[SAMPLE_die]) sound_play[SAMPLE_boom] = 0; /* no explosions if player goes home */
80 for(i = 0; i < SAMPLE_MAX; i++) {
81 if(sound_play[sound_priority[i]]) {
82 mix_play[mix_count++] = sound_priority[i];
83 if(mix_count == MIXER_MAX) break; /* cant mix too many sounds at once */
87 /* check for incoming messages */
88 if(mix_count || audio_fd != -1) { /* dont block if we are playing sounds */
92 FD_SET(sound_pipe[0], &rfds);
94 tv.tv_usec = 0; /* (900000 * fragment_size / sample_rate) */
95 i = select(sound_pipe[0] + 1, &rfds, 0, 0, &tv); /* dont block */
97 fprintf(stderr, "%s: %s: %s\n", progname, "select failed", strerror(errno));
100 if(i == 0) break; /* no messages */
103 /* get a message and start a sound */
104 i = read(sound_pipe[0], &play, sizeof(play));
106 fprintf(stderr, "%s: %s: %s\n", progname, "read failed", strerror(errno));
110 fprintf(stderr, "%s: %s: %s\n", progname, "read sound", "Broken pipe");
113 if(i != sizeof(play)) {
114 fprintf(stderr, "%s: %s\n", progname, "bad message length");
117 for(i = 0; i < SAMPLE_MAX; i++) {
119 sound_play[i] = 1; /* play this sound */
120 sound_pos[i] = 0; /* start it from the start */
125 /* open the audio device if there are sounds to play */
126 if(mix_count && audio_fd == -1) {
127 audio_fd = open(audioname, O_WRONLY);
128 if(audio_fd == -1) goto reset;
129 #ifdef OPEN_SOUND_SYSTEM
131 if(ioctl(audio_fd, SNDCTL_DSP_SETFRAGMENT, &i) == -1) {
132 fprintf(stderr, "%s: \"%s\": %s (%d): %s\n", progname, audioname, "unable to set fragment size", 512, strerror(errno));
135 if(ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &i) == -1) {
136 fprintf(stderr, "%s: \"%s\": %s: %s\n", progname, audioname, "unable to query audio format", strerror(errno));
139 audio_format = (i & AFMT_U8) ? AFMT_U8 : AFMT_MU_LAW; /* prefer 8 bit unsigned and fall back on mu-law */
141 if(ioctl(audio_fd, SNDCTL_DSP_SETFMT, &i) == -1) {
142 fprintf(stderr, "%s: \"%s\": %s (%d): %s\n", progname, audioname, "unable to set audio format", audio_format, strerror(errno));
145 if(i == AFMT_MU_LAW) {
146 audio_format = AUDIO_ULAW;
147 } else if(i == AFMT_U8) {
148 audio_format = AUDIO_U8;
150 fprintf(stderr, "%s: \"%s\": %s (%d)\n", progname, audioname, "audio format required by device not supported", i);
154 if(ioctl(audio_fd, SNDCTL_DSP_CHANNELS, &i) == -1) {
155 fprintf(stderr, "%s: \"%s\": %s: %s\n", progname, audioname, "unable to set channels to mono", strerror(errno));
159 fprintf(stderr, "%s: \"%s\": %s (%d)\n", progname, audioname, "channels required by device not supported", i);
163 if(ioctl(audio_fd, SNDCTL_DSP_SPEED, &i) == -1) {
164 fprintf(stderr, "%s: \"%s\": %s: %s\n", progname, audioname, "unable to set sampling rate", strerror(errno));
168 if(ioctl(audio_fd, SNDCTL_DSP_GETBLKSIZE, &i) == -1) {
169 fprintf(stderr, "%s: \"%s\": %s: %s\n", progname, audioname, "unable to get block size", strerror(errno));
174 if(fcntl(audio_fd, F_SETFL, O_NONBLOCK) == -1) {
175 fprintf(stderr, "%s: \"%s\": %s: %s\n", progname, audioname, "unable to make audio non blocking", strerror(errno));
178 #endif /* OPEN_SOUND_SYSTEM */
179 audio_buffer = malloc(fragment_size * sizeof(*audio_buffer));
180 if(audio_buffer == 0) {
181 fprintf(stderr, "%s: %s (%d): %s\n", progname, "unable to malloc audio buffer", fragment_size * sizeof(*audio_buffer), strerror(errno));
184 mix_buffer = malloc(fragment_size * sizeof(*mix_buffer));
185 if(mix_buffer == 0) {
186 fprintf(stderr, "%s: %s (%d): %s\n", progname, "unable to malloc mixing buffer", fragment_size * sizeof(*mix_buffer), strerror(errno));
191 /* close the audio device if no sounds are playing */
192 if(mix_count == 0 && audio_fd != -1) {
201 /* if we are playing sounds and the audio device is open, mix them */
202 if(mix_count && audio_fd != -1) {
204 memset(mix_buffer, 0, fragment_size * sizeof(*mix_buffer)); /* prepare mix buffer */
206 for(i = 0; i < mix_count; i++) {
207 register short *mix_ptr = mix_buffer;
208 register short *sound_ptr = sound_data[mix_play[i]] + sound_pos[mix_play[i]];
209 register long count = sound_length[mix_play[i]] - sound_pos[mix_play[i]];
210 if(count > fragment_size) count = fragment_size;
211 while(count--) *mix_ptr++ += *sound_ptr++; /* mix the sounds in */
213 switch(audio_format) {
215 for(i = 0; i < fragment_size; i++) audio_buffer[i] = linear_to_ulaw[mix_buffer[i] + 32768];
218 for(i = 0; i < fragment_size; i++) audio_buffer[i] = (mix_buffer[i] + 32768) >> 8;
222 /* advance sound pointers */
223 for(i = 0; i < SAMPLE_MAX; i++) {
225 if(sound_pos[i] + fragment_size < sound_length[i]) {
226 sound_pos[i] += fragment_size;
233 /* send the data to the audio device */
234 i = write(audio_fd, audio_buffer, fragment_size);
236 fprintf(stderr, "%s: %s: %s\n", progname, "write error", strerror(errno));
239 if(i != fragment_size) {
240 fprintf(stderr, "%s: %s\n", progname, "bad write length");
247 if(audio_fd != -1) close(audio_fd);
248 if(audio_buffer) free(audio_buffer);
249 if(mix_buffer) free(mix_buffer);
250 goto loop; /* back to top */
253 if(audio_fd != -1) close(audio_fd);
254 if(audio_buffer) free(audio_buffer);
255 if(mix_buffer) free(mix_buffer);
259 int read_sample(char *name, short **data, long *length)
267 unsigned char buffer[24];
270 file = fopen(name, "rb");
272 fprintf(stderr, "%s: \"%s\": %s: %s\n", progname, name, "open error", strerror(errno));
273 result = 1; goto fail;
275 actual = fread(buffer, 1, 24, file);
277 fprintf(stderr, "%s: \"%s\": %s: %s\n", progname, name, "read error", strerror(errno));
278 result = 1; goto fail;
281 fprintf(stderr, "%s: \"%s\": %s\n", progname, name, "premature eof");
282 result = 1; goto fail;
284 temp = buffer[0] << 24 | buffer[1] << 16 | buffer[2] << 8 | buffer[3]; /* magic */
285 if(temp != 0x2e736e64) {
286 fprintf(stderr, "%s: \"%s\": %s\n", progname, name, "unrecognized file format");
287 result = 1; goto fail;
289 temp = buffer[4] << 24 | buffer[5] << 16 | buffer[6] << 8 | buffer[7]; /* header length */
291 fprintf(stderr, "%s: \"%s\": %s\n", progname, name, "bad header length");
292 result = 1; goto fail;
295 for(i = 24; i < actual; i++) { /* skip the rest of the header */
300 temp = buffer[8] << 24 | buffer[9] << 16 | buffer[10] << 8 | buffer[11]; /* data length */
302 temp = buffer[12] << 24 | buffer[13] << 16 | buffer[14] << 8 | buffer[15]; /* encoding */
304 fprintf(stderr, "%s: \"%s\": %s (%ld != 1)\n", progname, name, "bad encoding type", temp);
305 result = 1; goto fail;
307 temp = buffer[16] << 24 | buffer[17] << 16 | buffer[18] << 8 | buffer[19]; /* sample rate */
309 fprintf(stderr, "%s: \"%s\": %s (%ld != 8000)\n", progname, name, "bad sample rate", temp);
310 result = 1; goto fail;
312 temp = buffer[20] << 24 | buffer[21] << 16 | buffer[22] << 8 | buffer[23]; /* channels */
314 fprintf(stderr, "%s: \"%s\": %s (%ld != 1)\n", progname, name, "unsupported channels", temp);
315 result = 1; goto fail;
318 dataptr = malloc(datalength * sizeof(*dataptr));
320 fprintf(stderr, "%s: \"%s\": %s (%ld): %s\n", progname, name, "unable to malloc buffer", datalength * sizeof(*dataptr), strerror(errno));
321 result = 1; goto fail;
324 for(i = 0; i < datalength; i++) {
327 dataptr[i] = ulaw_to_linear[ch];
333 *length = datalength;
336 if(file) fclose(file);
340 #endif /* defined(PLATFORM_LINUX) || defined(PLATFORM_BSD) */