| 1 |
/* |
| 2 |
* audio_irix.cpp - Audio support, SGI Irix implementation |
| 3 |
* |
| 4 |
* Basilisk II (C) 1997-2002 Christian Bauer |
| 5 |
* |
| 6 |
* This program is free software; you can redistribute it and/or modify |
| 7 |
* it under the terms of the GNU General Public License as published by |
| 8 |
* the Free Software Foundation; either version 2 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 |
*/ |
| 20 |
|
| 21 |
#include "sysdeps.h" |
| 22 |
|
| 23 |
#include <sys/ioctl.h> |
| 24 |
#include <unistd.h> |
| 25 |
#include <errno.h> |
| 26 |
#include <pthread.h> |
| 27 |
#include <semaphore.h> |
| 28 |
|
| 29 |
#include <dmedia/audio.h> |
| 30 |
#include <dmedia/dmedia.h> |
| 31 |
|
| 32 |
#include "cpu_emulation.h" |
| 33 |
#include "main.h" |
| 34 |
#include "prefs.h" |
| 35 |
#include "user_strings.h" |
| 36 |
#include "audio.h" |
| 37 |
#include "audio_defs.h" |
| 38 |
|
| 39 |
#define DEBUG 0 |
| 40 |
#include "debug.h" |
| 41 |
|
| 42 |
|
| 43 |
// The currently selected audio parameters (indices in audio_sample_rates[] |
| 44 |
// etc. vectors) |
| 45 |
static int audio_sample_rate_index = 0; |
| 46 |
static int audio_sample_size_index = 0; |
| 47 |
static int audio_channel_count_index = 0; |
| 48 |
|
| 49 |
// Global variables |
| 50 |
static int audio_fd = -1; // fd from audio library |
| 51 |
static sem_t audio_irq_done_sem; // Signal from interrupt to streaming thread: data block read |
| 52 |
static bool sem_inited = false; // Flag: audio_irq_done_sem initialized |
| 53 |
static int sound_buffer_size; // Size of sound buffer in bytes |
| 54 |
static int sound_buffer_fill_point; // Fill buffer when this many frames are empty |
| 55 |
static uint8 silence_byte = 0; // Byte value to use to fill sound buffers with silence |
| 56 |
static pthread_t stream_thread; // Audio streaming thread |
| 57 |
static pthread_attr_t stream_thread_attr; // Streaming thread attributes |
| 58 |
static bool stream_thread_active = false; // Flag: streaming thread installed |
| 59 |
static volatile bool stream_thread_cancel = false; // Flag: cancel streaming thread |
| 60 |
|
| 61 |
static bool current_main_mute = false; // Flag: output muted |
| 62 |
static bool current_speaker_mute = false; // Flag: speaker muted |
| 63 |
static uint32 current_main_volume = 0; // Output volume |
| 64 |
static uint32 current_speaker_volume = 0; // Speaker volume |
| 65 |
|
| 66 |
// IRIX libaudio control structures |
| 67 |
static ALconfig config; |
| 68 |
static ALport port; |
| 69 |
|
| 70 |
|
| 71 |
// Prototypes |
| 72 |
static void *stream_func(void *arg); |
| 73 |
static uint32 read_volume(void); |
| 74 |
static bool read_mute(void); |
| 75 |
static void set_mute(bool mute); |
| 76 |
|
| 77 |
|
| 78 |
/* |
| 79 |
* Initialization |
| 80 |
*/ |
| 81 |
|
| 82 |
// Set AudioStatus to reflect current audio stream format |
| 83 |
static void set_audio_status_format(void) |
| 84 |
{ |
| 85 |
AudioStatus.sample_rate = audio_sample_rates[audio_sample_rate_index]; |
| 86 |
AudioStatus.sample_size = audio_sample_sizes[audio_sample_size_index]; |
| 87 |
AudioStatus.channels = audio_channel_counts[audio_channel_count_index]; |
| 88 |
} |
| 89 |
|
| 90 |
bool open_audio(void) |
| 91 |
{ |
| 92 |
ALpv pv[2]; |
| 93 |
|
| 94 |
printf("Using libaudio audio output\n"); |
| 95 |
|
| 96 |
// Get supported sample formats |
| 97 |
|
| 98 |
if (audio_sample_sizes.empty()) { |
| 99 |
// All sample sizes are supported |
| 100 |
audio_sample_sizes.push_back(8); |
| 101 |
audio_sample_sizes.push_back(16); |
| 102 |
|
| 103 |
// Assume at least two channels are supported. Some IRIX boxes |
| 104 |
// can do 4 or more... MacOS only handles up to 2. |
| 105 |
audio_channel_counts.push_back(1); |
| 106 |
audio_channel_counts.push_back(2); |
| 107 |
|
| 108 |
if (audio_sample_sizes.empty() || audio_channel_counts.empty()) { |
| 109 |
WarningAlert(GetString(STR_AUDIO_FORMAT_WARN)); |
| 110 |
alClosePort(port); |
| 111 |
audio_fd = -1; |
| 112 |
return false; |
| 113 |
} |
| 114 |
|
| 115 |
audio_sample_rates.push_back( 8000 << 16); |
| 116 |
audio_sample_rates.push_back(11025 << 16); |
| 117 |
audio_sample_rates.push_back(22050 << 16); |
| 118 |
audio_sample_rates.push_back(44100 << 16); |
| 119 |
|
| 120 |
// Default to highest supported values |
| 121 |
audio_sample_rate_index = audio_sample_rates.size() - 1; |
| 122 |
audio_sample_size_index = audio_sample_sizes.size() - 1; |
| 123 |
audio_channel_count_index = audio_channel_counts.size() - 1; |
| 124 |
} |
| 125 |
|
| 126 |
// Set the sample format |
| 127 |
|
| 128 |
D(bug("Size %d, channels %d, rate %d\n", |
| 129 |
audio_sample_sizes[audio_sample_size_index], |
| 130 |
audio_channel_counts[audio_channel_count_index], |
| 131 |
audio_sample_rates[audio_sample_rate_index] >> 16)); |
| 132 |
config = alNewConfig(); |
| 133 |
alSetSampFmt(config, AL_SAMPFMT_TWOSCOMP); |
| 134 |
if (audio_sample_sizes[audio_sample_size_index] == 8) { |
| 135 |
alSetWidth(config, AL_SAMPLE_8); |
| 136 |
} |
| 137 |
else { |
| 138 |
alSetWidth(config, AL_SAMPLE_16); |
| 139 |
} |
| 140 |
alSetChannels(config, audio_channel_counts[audio_channel_count_index]); |
| 141 |
alSetDevice(config, AL_DEFAULT_OUTPUT); // Allow selecting via prefs? |
| 142 |
|
| 143 |
// Try to open the audio library |
| 144 |
|
| 145 |
port = alOpenPort("BasiliskII", "w", config); |
| 146 |
if (port == NULL) { |
| 147 |
fprintf(stderr, "ERROR: Cannot open audio port: %s\n", |
| 148 |
alGetErrorString(oserror())); |
| 149 |
WarningAlert(GetString(STR_NO_AUDIO_WARN)); |
| 150 |
return false; |
| 151 |
} |
| 152 |
|
| 153 |
// Set the sample rate |
| 154 |
|
| 155 |
pv[0].param = AL_RATE; |
| 156 |
pv[0].value.ll = alDoubleToFixed(audio_sample_rates[audio_sample_rate_index] >> 16); |
| 157 |
pv[1].param = AL_MASTER_CLOCK; |
| 158 |
pv[1].value.i = AL_CRYSTAL_MCLK_TYPE; |
| 159 |
if (alSetParams(AL_DEFAULT_OUTPUT, pv, 2) < 0) { |
| 160 |
fprintf(stderr, "ERROR: libaudio setparams failed: %s\n", |
| 161 |
alGetErrorString(oserror())); |
| 162 |
alClosePort(port); |
| 163 |
return false; |
| 164 |
} |
| 165 |
|
| 166 |
// Compute sound buffer size and libaudio refill point |
| 167 |
|
| 168 |
config = alGetConfig(port); |
| 169 |
audio_frames_per_block = alGetQueueSize(config); |
| 170 |
if (audio_frames_per_block < 0) { |
| 171 |
fprintf(stderr, "ERROR: couldn't get queue size: %s\n", |
| 172 |
alGetErrorString(oserror())); |
| 173 |
alClosePort(port); |
| 174 |
return false; |
| 175 |
} |
| 176 |
D(bug("alGetQueueSize %d, width %d, channels %d\n", |
| 177 |
audio_frames_per_block, |
| 178 |
alGetWidth(config), |
| 179 |
alGetChannels(config))); |
| 180 |
|
| 181 |
// Put a limit on the Mac sound buffer size, to decrease delay |
| 182 |
#define AUDIO_BUFFER_MSEC 50 // milliseconds of sound to buffer |
| 183 |
int target_frames_per_block = |
| 184 |
(audio_sample_rates[audio_sample_rate_index] >> 16) * |
| 185 |
AUDIO_BUFFER_MSEC / 1000; |
| 186 |
if (audio_frames_per_block > target_frames_per_block) |
| 187 |
audio_frames_per_block = target_frames_per_block; |
| 188 |
D(bug("frames per block %d\n", audio_frames_per_block)); |
| 189 |
|
| 190 |
alZeroFrames(port, audio_frames_per_block); // so we don't underflow |
| 191 |
|
| 192 |
// Try to keep the buffer pretty full |
| 193 |
sound_buffer_fill_point = alGetQueueSize(config) - |
| 194 |
2 * audio_frames_per_block; |
| 195 |
if (sound_buffer_fill_point < 0) |
| 196 |
sound_buffer_fill_point = alGetQueueSize(config) / 3; |
| 197 |
D(bug("fill point %d\n", sound_buffer_fill_point)); |
| 198 |
|
| 199 |
sound_buffer_size = (audio_sample_sizes[audio_sample_size_index] >> 3) * |
| 200 |
audio_channel_counts[audio_channel_count_index] * |
| 201 |
audio_frames_per_block; |
| 202 |
set_audio_status_format(); |
| 203 |
|
| 204 |
// Get a file descriptor we can select() on |
| 205 |
|
| 206 |
audio_fd = alGetFD(port); |
| 207 |
if (audio_fd < 0) { |
| 208 |
fprintf(stderr, "ERROR: couldn't get libaudio file descriptor: %s\n", |
| 209 |
alGetErrorString(oserror())); |
| 210 |
alClosePort(port); |
| 211 |
return false; |
| 212 |
} |
| 213 |
|
| 214 |
// Initialize volume, mute settings |
| 215 |
current_main_volume = current_speaker_volume = read_volume(); |
| 216 |
current_main_mute = current_speaker_mute = read_mute(); |
| 217 |
|
| 218 |
|
| 219 |
// Start streaming thread |
| 220 |
Set_pthread_attr(&stream_thread_attr, 0); |
| 221 |
stream_thread_active = (pthread_create(&stream_thread, &stream_thread_attr, stream_func, NULL) == 0); |
| 222 |
|
| 223 |
// Everything went fine |
| 224 |
audio_open = true; |
| 225 |
return true; |
| 226 |
} |
| 227 |
|
| 228 |
void AudioInit(void) |
| 229 |
{ |
| 230 |
// Init audio status (reasonable defaults) and feature flags |
| 231 |
AudioStatus.sample_rate = 44100 << 16; |
| 232 |
AudioStatus.sample_size = 16; |
| 233 |
AudioStatus.channels = 2; |
| 234 |
AudioStatus.mixer = 0; |
| 235 |
AudioStatus.num_sources = 0; |
| 236 |
audio_component_flags = cmpWantsRegisterMessage | kStereoOut | k16BitOut; |
| 237 |
|
| 238 |
// Sound disabled in prefs? Then do nothing |
| 239 |
if (PrefsFindBool("nosound")) |
| 240 |
return; |
| 241 |
|
| 242 |
// Init semaphore |
| 243 |
if (sem_init(&audio_irq_done_sem, 0, 0) < 0) |
| 244 |
return; |
| 245 |
sem_inited = true; |
| 246 |
|
| 247 |
// Open and initialize audio device |
| 248 |
open_audio(); |
| 249 |
} |
| 250 |
|
| 251 |
|
| 252 |
/* |
| 253 |
* Deinitialization |
| 254 |
*/ |
| 255 |
|
| 256 |
static void close_audio(void) |
| 257 |
{ |
| 258 |
// Stop stream and delete semaphore |
| 259 |
if (stream_thread_active) { |
| 260 |
stream_thread_cancel = true; |
| 261 |
#ifdef HAVE_PTHREAD_CANCEL |
| 262 |
pthread_cancel(stream_thread); |
| 263 |
#endif |
| 264 |
pthread_join(stream_thread, NULL); |
| 265 |
stream_thread_active = false; |
| 266 |
stream_thread_cancel = false; |
| 267 |
} |
| 268 |
|
| 269 |
// Close audio library |
| 270 |
alClosePort(port); |
| 271 |
|
| 272 |
audio_open = false; |
| 273 |
} |
| 274 |
|
| 275 |
void AudioExit(void) |
| 276 |
{ |
| 277 |
// Close audio device |
| 278 |
close_audio(); |
| 279 |
|
| 280 |
// Delete semaphore |
| 281 |
if (sem_inited) { |
| 282 |
sem_destroy(&audio_irq_done_sem); |
| 283 |
sem_inited = false; |
| 284 |
} |
| 285 |
} |
| 286 |
|
| 287 |
|
| 288 |
/* |
| 289 |
* First source added, start audio stream |
| 290 |
*/ |
| 291 |
|
| 292 |
void audio_enter_stream() |
| 293 |
{ |
| 294 |
// Streaming thread is always running to avoid clicking noises |
| 295 |
} |
| 296 |
|
| 297 |
|
| 298 |
/* |
| 299 |
* Last source removed, stop audio stream |
| 300 |
*/ |
| 301 |
|
| 302 |
void audio_exit_stream() |
| 303 |
{ |
| 304 |
// Streaming thread is always running to avoid clicking noises |
| 305 |
} |
| 306 |
|
| 307 |
|
| 308 |
/* |
| 309 |
* Streaming function |
| 310 |
*/ |
| 311 |
|
| 312 |
static void *stream_func(void *arg) |
| 313 |
{ |
| 314 |
int32 *last_buffer = new int32[sound_buffer_size / 4]; |
| 315 |
fd_set audio_fdset; |
| 316 |
int numfds, was_error; |
| 317 |
|
| 318 |
numfds = audio_fd + 1; |
| 319 |
FD_ZERO(&audio_fdset); |
| 320 |
|
| 321 |
while (!stream_thread_cancel) { |
| 322 |
if (AudioStatus.num_sources) { |
| 323 |
|
| 324 |
// Trigger audio interrupt to get new buffer |
| 325 |
D(bug("stream: triggering irq\n")); |
| 326 |
SetInterruptFlag(INTFLAG_AUDIO); |
| 327 |
TriggerInterrupt(); |
| 328 |
D(bug("stream: waiting for ack\n")); |
| 329 |
sem_wait(&audio_irq_done_sem); |
| 330 |
D(bug("stream: ack received\n")); |
| 331 |
|
| 332 |
// Get size of audio data |
| 333 |
uint32 apple_stream_info = ReadMacInt32(audio_data + adatStreamInfo); |
| 334 |
if (!current_main_mute && |
| 335 |
!current_speaker_mute && |
| 336 |
apple_stream_info) { |
| 337 |
int work_size = ReadMacInt32(apple_stream_info + scd_sampleCount) * (AudioStatus.sample_size >> 3) * AudioStatus.channels; |
| 338 |
D(bug("stream: work_size %d\n", work_size)); |
| 339 |
if (work_size > sound_buffer_size) |
| 340 |
work_size = sound_buffer_size; |
| 341 |
if (work_size == 0) |
| 342 |
goto silence; |
| 343 |
|
| 344 |
// Send data to audio library. Convert 8-bit data |
| 345 |
// unsigned->signed, using same algorithm as audio_amiga.cpp. |
| 346 |
// It works fine for 8-bit mono, but not stereo. |
| 347 |
if (AudioStatus.sample_size == 8) { |
| 348 |
uint32 *p = (uint32 *)Mac2HostAddr(ReadMacInt32(apple_stream_info + scd_buffer)); |
| 349 |
uint32 *q = (uint32 *)last_buffer; |
| 350 |
int r = work_size >> 2; |
| 351 |
// XXX not quite right.... |
| 352 |
while (r--) |
| 353 |
*q++ = *p++ ^ 0x80808080; |
| 354 |
if (work_size != sound_buffer_size) |
| 355 |
memset((uint8 *)last_buffer + work_size, silence_byte, sound_buffer_size - work_size); |
| 356 |
alWriteFrames(port, last_buffer, audio_frames_per_block); |
| 357 |
} |
| 358 |
else if (work_size == sound_buffer_size) |
| 359 |
alWriteFrames(port, Mac2HostAddr(ReadMacInt32(apple_stream_info + scd_buffer)), audio_frames_per_block); |
| 360 |
else { |
| 361 |
// Last buffer |
| 362 |
Mac2Host_memcpy(last_buffer, ReadMacInt32(apple_stream_info + scd_buffer), work_size); |
| 363 |
memset((uint8 *)last_buffer + work_size, silence_byte, sound_buffer_size - work_size); |
| 364 |
alWriteFrames(port, last_buffer, audio_frames_per_block); |
| 365 |
} |
| 366 |
D(bug("stream: data written\n")); |
| 367 |
} else |
| 368 |
goto silence; |
| 369 |
|
| 370 |
} else { |
| 371 |
|
| 372 |
// Audio not active, play silence |
| 373 |
silence: // D(bug("stream: silence\n")); |
| 374 |
alZeroFrames(port, audio_frames_per_block); |
| 375 |
} |
| 376 |
|
| 377 |
// Wait for fill point to be reached (may be immediate) |
| 378 |
|
| 379 |
if (alSetFillPoint(port, sound_buffer_fill_point) < 0) { |
| 380 |
fprintf(stderr, "ERROR: alSetFillPoint failed: %s\n", |
| 381 |
alGetErrorString(oserror())); |
| 382 |
// Should stop the audio here.... |
| 383 |
} |
| 384 |
|
| 385 |
do { |
| 386 |
errno = 0; |
| 387 |
FD_SET(audio_fd, &audio_fdset); |
| 388 |
was_error = select(numfds, NULL, &audio_fdset, NULL, NULL); |
| 389 |
} while(was_error < 0 && (errno == EINTR)); |
| 390 |
if (was_error < 0) { |
| 391 |
fprintf(stderr, "ERROR: select returned %d, errno %d\n", |
| 392 |
was_error, errno); |
| 393 |
// Should stop audio here.... |
| 394 |
} |
| 395 |
} |
| 396 |
delete[] last_buffer; |
| 397 |
return NULL; |
| 398 |
} |
| 399 |
|
| 400 |
|
| 401 |
/* |
| 402 |
* Read or set the current output volume using the audio library |
| 403 |
*/ |
| 404 |
|
| 405 |
static uint32 read_volume(void) |
| 406 |
{ |
| 407 |
ALpv x[2]; |
| 408 |
ALfixed gain[8]; |
| 409 |
double maxgain, mingain; |
| 410 |
ALparamInfo pi; |
| 411 |
uint32 ret = 0x01000100; // default, maximum value |
| 412 |
int dev = alGetDevice(config); |
| 413 |
|
| 414 |
// Fetch the maximum and minimum gain settings |
| 415 |
|
| 416 |
alGetParamInfo(dev, AL_GAIN, &pi); |
| 417 |
maxgain = alFixedToDouble(pi.max.ll); |
| 418 |
mingain = alFixedToDouble(pi.min.ll); |
| 419 |
// printf("maxgain = %lf dB, mingain = %lf dB\n", maxgain, mingain); |
| 420 |
|
| 421 |
// Get the current gain values |
| 422 |
|
| 423 |
x[0].param = AL_GAIN; |
| 424 |
x[0].value.ptr = gain; |
| 425 |
x[0].sizeIn = sizeof(gain) / sizeof(gain[0]); |
| 426 |
x[1].param = AL_CHANNELS; |
| 427 |
if (alGetParams(dev, x, 2) < 0) { |
| 428 |
printf("alGetParams failed: %s\n", alGetErrorString(oserror())); |
| 429 |
} |
| 430 |
else { |
| 431 |
if (x[0].sizeOut < 0) { |
| 432 |
printf("AL_GAIN was an unrecognized parameter\n"); |
| 433 |
} |
| 434 |
else { |
| 435 |
double v; |
| 436 |
uint32 left, right; |
| 437 |
|
| 438 |
// Left |
| 439 |
v = alFixedToDouble(gain[0]); |
| 440 |
if (v < mingain) |
| 441 |
v = mingain; // handle gain == -inf |
| 442 |
v = (v - mingain) / (maxgain - mingain); // scale to 0..1 |
| 443 |
left = (uint32)(v * (double)256); // convert to 8.8 fixed point |
| 444 |
|
| 445 |
// Right |
| 446 |
if (x[0].sizeOut <= 1) { // handle a mono interface |
| 447 |
right = left; |
| 448 |
} |
| 449 |
else { |
| 450 |
v = alFixedToDouble(gain[1]); |
| 451 |
if (v < mingain) |
| 452 |
v = mingain; // handle gain == -inf |
| 453 |
v = (v - mingain) / (maxgain - mingain); // scale to 0..1 |
| 454 |
right = (uint32)(v * (double)256); // convert to 8.8 fixed point |
| 455 |
} |
| 456 |
|
| 457 |
ret = (left << 16) | right; |
| 458 |
} |
| 459 |
} |
| 460 |
|
| 461 |
return ret; |
| 462 |
} |
| 463 |
|
| 464 |
static void set_volume(uint32 vol) |
| 465 |
{ |
| 466 |
ALpv x[1]; |
| 467 |
ALfixed gain[2]; // left and right |
| 468 |
double maxgain, mingain; |
| 469 |
ALparamInfo pi; |
| 470 |
int dev = alGetDevice(config); |
| 471 |
|
| 472 |
// Fetch the maximum and minimum gain settings |
| 473 |
|
| 474 |
alGetParamInfo(dev, AL_GAIN, &pi); |
| 475 |
maxgain = alFixedToDouble(pi.max.ll); |
| 476 |
mingain = alFixedToDouble(pi.min.ll); |
| 477 |
|
| 478 |
// Set the new gain values |
| 479 |
|
| 480 |
x[0].param = AL_GAIN; |
| 481 |
x[0].value.ptr = gain; |
| 482 |
x[0].sizeIn = sizeof(gain) / sizeof(gain[0]); |
| 483 |
|
| 484 |
uint32 left = vol >> 16; |
| 485 |
uint32 right = vol & 0xffff; |
| 486 |
double lv, rv; |
| 487 |
|
| 488 |
if (left == 0 && pi.specialVals & AL_NEG_INFINITY_BIT) { |
| 489 |
lv = AL_NEG_INFINITY; |
| 490 |
} |
| 491 |
else { |
| 492 |
lv = ((double)left / 256) * (maxgain - mingain) + mingain; |
| 493 |
} |
| 494 |
|
| 495 |
if (right == 0 && pi.specialVals & AL_NEG_INFINITY_BIT) { |
| 496 |
rv = AL_NEG_INFINITY; |
| 497 |
} |
| 498 |
else { |
| 499 |
rv = ((double)right / 256) * (maxgain - mingain) + mingain; |
| 500 |
} |
| 501 |
|
| 502 |
D(bug("set_volume: left=%lf dB, right=%lf dB\n", lv, rv)); |
| 503 |
|
| 504 |
gain[0] = alDoubleToFixed(lv); |
| 505 |
gain[1] = alDoubleToFixed(rv); |
| 506 |
|
| 507 |
if (alSetParams(dev, x, 1) < 0) { |
| 508 |
printf("alSetParams failed: %s\n", alGetErrorString(oserror())); |
| 509 |
} |
| 510 |
} |
| 511 |
|
| 512 |
|
| 513 |
/* |
| 514 |
* Read or set the mute setting using the audio library |
| 515 |
*/ |
| 516 |
|
| 517 |
static bool read_mute(void) |
| 518 |
{ |
| 519 |
bool ret; |
| 520 |
int dev = alGetDevice(config); |
| 521 |
ALpv x; |
| 522 |
x.param = AL_MUTE; |
| 523 |
|
| 524 |
if (alGetParams(dev, &x, 1) < 0) { |
| 525 |
printf("alSetParams failed: %s\n", alGetErrorString(oserror())); |
| 526 |
return current_main_mute; // Or just return false? |
| 527 |
} |
| 528 |
|
| 529 |
ret = x.value.i; |
| 530 |
|
| 531 |
D(bug("read_mute: mute=%d\n", ret)); |
| 532 |
return ret; |
| 533 |
} |
| 534 |
|
| 535 |
static void set_mute(bool mute) |
| 536 |
{ |
| 537 |
D(bug("set_mute: mute=%ld\n", mute)); |
| 538 |
|
| 539 |
int dev = alGetDevice(config); |
| 540 |
ALpv x; |
| 541 |
x.param = AL_MUTE; |
| 542 |
x.value.i = mute; |
| 543 |
|
| 544 |
if (alSetParams(dev, &x, 1) < 0) { |
| 545 |
printf("alSetParams failed: %s\n", alGetErrorString(oserror())); |
| 546 |
} |
| 547 |
} |
| 548 |
|
| 549 |
|
| 550 |
|
| 551 |
/* |
| 552 |
* MacOS audio interrupt, read next data block |
| 553 |
*/ |
| 554 |
|
| 555 |
void AudioInterrupt(void) |
| 556 |
{ |
| 557 |
D(bug("AudioInterrupt\n")); |
| 558 |
|
| 559 |
// Get data from apple mixer |
| 560 |
if (AudioStatus.mixer) { |
| 561 |
M68kRegisters r; |
| 562 |
r.a[0] = audio_data + adatStreamInfo; |
| 563 |
r.a[1] = AudioStatus.mixer; |
| 564 |
Execute68k(audio_data + adatGetSourceData, &r); |
| 565 |
D(bug(" GetSourceData() returns %08lx\n", r.d[0])); |
| 566 |
} else |
| 567 |
WriteMacInt32(audio_data + adatStreamInfo, 0); |
| 568 |
|
| 569 |
// Signal stream function |
| 570 |
sem_post(&audio_irq_done_sem); |
| 571 |
D(bug("AudioInterrupt done\n")); |
| 572 |
} |
| 573 |
|
| 574 |
|
| 575 |
/* |
| 576 |
* Set sampling parameters |
| 577 |
* "index" is an index into the audio_sample_rates[] etc. vectors |
| 578 |
* It is guaranteed that AudioStatus.num_sources == 0 |
| 579 |
*/ |
| 580 |
|
| 581 |
bool audio_set_sample_rate(int index) |
| 582 |
{ |
| 583 |
close_audio(); |
| 584 |
audio_sample_rate_index = index; |
| 585 |
return open_audio(); |
| 586 |
} |
| 587 |
|
| 588 |
bool audio_set_sample_size(int index) |
| 589 |
{ |
| 590 |
close_audio(); |
| 591 |
audio_sample_size_index = index; |
| 592 |
return open_audio(); |
| 593 |
} |
| 594 |
|
| 595 |
bool audio_set_channels(int index) |
| 596 |
{ |
| 597 |
close_audio(); |
| 598 |
audio_channel_count_index = index; |
| 599 |
return open_audio(); |
| 600 |
} |
| 601 |
|
| 602 |
|
| 603 |
/* |
| 604 |
* Get/set volume controls (volume values received/returned have the left channel |
| 605 |
* volume in the upper 16 bits and the right channel volume in the lower 16 bits; |
| 606 |
* both volumes are 8.8 fixed point values with 0x0100 meaning "maximum volume")) |
| 607 |
*/ |
| 608 |
|
| 609 |
bool audio_get_main_mute(void) |
| 610 |
{ |
| 611 |
D(bug("audio_get_main_mute: mute=%ld\n", current_main_mute)); |
| 612 |
|
| 613 |
return current_main_mute; |
| 614 |
} |
| 615 |
|
| 616 |
uint32 audio_get_main_volume(void) |
| 617 |
{ |
| 618 |
uint32 ret = current_main_volume; |
| 619 |
|
| 620 |
D(bug("audio_get_main_volume: vol=0x%x\n", ret)); |
| 621 |
|
| 622 |
return ret; |
| 623 |
} |
| 624 |
|
| 625 |
bool audio_get_speaker_mute(void) |
| 626 |
{ |
| 627 |
D(bug("audio_get_speaker_mute: mute=%ld\n", current_speaker_mute)); |
| 628 |
|
| 629 |
return current_speaker_mute; |
| 630 |
} |
| 631 |
|
| 632 |
uint32 audio_get_speaker_volume(void) |
| 633 |
{ |
| 634 |
uint32 ret = current_speaker_volume; |
| 635 |
|
| 636 |
D(bug("audio_get_speaker_volume: vol=0x%x\n", ret)); |
| 637 |
|
| 638 |
return ret; |
| 639 |
} |
| 640 |
|
| 641 |
void audio_set_main_mute(bool mute) |
| 642 |
{ |
| 643 |
D(bug("audio_set_main_mute: mute=%ld\n", mute)); |
| 644 |
|
| 645 |
if (mute != current_main_mute) { |
| 646 |
current_main_mute = mute; |
| 647 |
} |
| 648 |
|
| 649 |
set_mute(current_main_mute); |
| 650 |
} |
| 651 |
|
| 652 |
void audio_set_main_volume(uint32 vol) |
| 653 |
{ |
| 654 |
|
| 655 |
D(bug("audio_set_main_volume: vol=%x\n", vol)); |
| 656 |
|
| 657 |
current_main_volume = vol; |
| 658 |
|
| 659 |
set_volume(vol); |
| 660 |
} |
| 661 |
|
| 662 |
void audio_set_speaker_mute(bool mute) |
| 663 |
{ |
| 664 |
D(bug("audio_set_speaker_mute: mute=%ld\n", mute)); |
| 665 |
|
| 666 |
if (mute != current_speaker_mute) { |
| 667 |
current_speaker_mute = mute; |
| 668 |
} |
| 669 |
|
| 670 |
set_mute(current_speaker_mute); |
| 671 |
} |
| 672 |
|
| 673 |
void audio_set_speaker_volume(uint32 vol) |
| 674 |
{ |
| 675 |
D(bug("audio_set_speaker_volume: vol=%x\n", vol)); |
| 676 |
|
| 677 |
current_speaker_volume = vol; |
| 678 |
|
| 679 |
set_volume(vol); |
| 680 |
} |
