code.delx.au - pulseaudio/blob - src/utils/padsp.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #ifdef _FILE_OFFSET_BITS
  27 #undef _FILE_OFFSET_BITS
  28 #endif
  29
  30 #ifndef _LARGEFILE64_SOURCE
  31 #define _LARGEFILE64_SOURCE 1
  32 #endif
  33
  34 #include <sys/soundcard.h>
  35 #include <sys/ioctl.h>
  36 #include <pthread.h>
  37 #include <unistd.h>
  38 #include <sys/socket.h>
  39 #include <sys/stat.h>
  40 #include <dlfcn.h>
  41 #include <errno.h>
  42 #include <fcntl.h>
  43 #include <string.h>
  44 #include <stdarg.h>
  45 #include <stdio.h>
  46 #include <signal.h>
  47
  48 #ifdef __linux__
  49 #include <linux/sockios.h>
  50 #endif
  51
  52 #include <pulse/pulseaudio.h>
  53 #include <pulsecore/llist.h>
  54 #include <pulsecore/gccmacro.h>
  55
  56 /* On some systems SIOCINQ isn't defined, but FIONREAD is just an alias */
  57 #if !defined(SIOCINQ) && defined(FIONREAD)
  58 # define SIOCINQ FIONREAD
  59 #endif
  60
  61 typedef enum {
  62     FD_INFO_MIXER,
  63     FD_INFO_STREAM,
  64 } fd_info_type_t;
  65
  66 typedef struct fd_info fd_info;
  67
  68 struct fd_info {
  69     pthread_mutex_t mutex;
  70     int ref;
  71     int unusable;
  72
  73     fd_info_type_t type;
  74     int app_fd, thread_fd;
  75
  76     pa_sample_spec sample_spec;
  77     size_t fragment_size;
  78     unsigned n_fragments;
  79
  80     pa_threaded_mainloop *mainloop;
  81     pa_context *context;
  82     pa_stream *play_stream;
  83     pa_stream *rec_stream;
  84
  85     pa_io_event *io_event;
  86     pa_io_event_flags_t io_flags;
  87
  88     void *buf;
  89     size_t rec_offset;
  90
  91     int operation_success;
  92
  93     pa_cvolume sink_volume, source_volume;
  94     uint32_t sink_index, source_index;
  95     int volume_modify_count;
  96
  97     int optr_n_blocks;
  98
  99     PA_LLIST_FIELDS(fd_info);
 100 };
 101
 102 static int dsp_drain(fd_info *i);
 103 static void fd_info_remove_from_list(fd_info *i);
 104
 105 static pthread_mutex_t fd_infos_mutex = PTHREAD_MUTEX_INITIALIZER;
 106 static pthread_mutex_t func_mutex = PTHREAD_MUTEX_INITIALIZER;
 107
 108 static PA_LLIST_HEAD(fd_info, fd_infos) = NULL;
 109
 110 static int (*_ioctl)(int, int, void*) = NULL;
 111 static int (*_close)(int) = NULL;
 112 static int (*_open)(const char *, int, mode_t) = NULL;
 113 static FILE* (*_fopen)(const char *path, const char *mode) = NULL;
 114 #ifdef HAVE_OPEN64
 115 static int (*_open64)(const char *, int, mode_t) = NULL;
 116 static FILE* (*_fopen64)(const char *path, const char *mode) = NULL;
 117 #endif
 118 static int (*_fclose)(FILE *f) = NULL;
 119 static int (*_access)(const char *, int) = NULL;
 120
 121 /* dlsym() violates ISO C, so confide the breakage into this function to
 122  * avoid warnings. */
 123 typedef void (*fnptr)(void);
 124 static inline fnptr dlsym_fn(void *handle, const char *symbol) {
 125     return (fnptr) (long) dlsym(handle, symbol);
 126 }
 127
 128 #define LOAD_IOCTL_FUNC() \
 129 do { \
 130     pthread_mutex_lock(&func_mutex); \
 131     if (!_ioctl)  \
 132         _ioctl = (int (*)(int, int, void*)) dlsym_fn(RTLD_NEXT, "ioctl"); \
 133     pthread_mutex_unlock(&func_mutex); \
 134 } while(0)
 135
 136 #define LOAD_OPEN_FUNC() \
 137 do { \
 138     pthread_mutex_lock(&func_mutex); \
 139     if (!_open) \
 140         _open = (int (*)(const char *, int, mode_t)) dlsym_fn(RTLD_NEXT, "open"); \
 141     pthread_mutex_unlock(&func_mutex); \
 142 } while(0)
 143
 144 #define LOAD_OPEN64_FUNC() \
 145 do { \
 146     pthread_mutex_lock(&func_mutex); \
 147     if (!_open64) \
 148         _open64 = (int (*)(const char *, int, mode_t)) dlsym_fn(RTLD_NEXT, "open64"); \
 149     pthread_mutex_unlock(&func_mutex); \
 150 } while(0)
 151
 152 #define LOAD_CLOSE_FUNC() \
 153 do { \
 154     pthread_mutex_lock(&func_mutex); \
 155     if (!_close) \
 156         _close = (int (*)(int)) dlsym_fn(RTLD_NEXT, "close"); \
 157     pthread_mutex_unlock(&func_mutex); \
 158 } while(0)
 159
 160 #define LOAD_ACCESS_FUNC() \
 161 do { \
 162     pthread_mutex_lock(&func_mutex); \
 163     if (!_access) \
 164         _access = (int (*)(const char*, int)) dlsym_fn(RTLD_NEXT, "access"); \
 165     pthread_mutex_unlock(&func_mutex); \
 166 } while(0)
 167
 168 #define LOAD_FOPEN_FUNC() \
 169 do { \
 170     pthread_mutex_lock(&func_mutex); \
 171     if (!_fopen) \
 172         _fopen = (FILE* (*)(const char *, const char*)) dlsym_fn(RTLD_NEXT, "fopen"); \
 173     pthread_mutex_unlock(&func_mutex); \
 174 } while(0)
 175
 176 #define LOAD_FOPEN64_FUNC() \
 177 do { \
 178     pthread_mutex_lock(&func_mutex); \
 179     if (!_fopen64) \
 180         _fopen64 = (FILE* (*)(const char *, const char*)) dlsym_fn(RTLD_NEXT, "fopen64"); \
 181     pthread_mutex_unlock(&func_mutex); \
 182 } while(0)
 183
 184 #define LOAD_FCLOSE_FUNC() \
 185 do { \
 186     pthread_mutex_lock(&func_mutex); \
 187     if (!_fclose) \
 188         _fclose = (int (*)(FILE *)) dlsym_fn(RTLD_NEXT, "fclose"); \
 189     pthread_mutex_unlock(&func_mutex); \
 190 } while(0)
 191
 192 #define CONTEXT_CHECK_DEAD_GOTO(i, label) do { \
 193 if (!(i)->context || pa_context_get_state((i)->context) != PA_CONTEXT_READY) { \
 194     debug(DEBUG_LEVEL_NORMAL, __FILE__": Not connected: %s\n", (i)->context ? pa_strerror(pa_context_errno((i)->context)) : "NULL"); \
 195     goto label; \
 196 } \
 197 } while(0);
 198
 199 #define PLAYBACK_STREAM_CHECK_DEAD_GOTO(i, label) do { \
 200 if (!(i)->context || pa_context_get_state((i)->context) != PA_CONTEXT_READY || \
 201     !(i)->play_stream || pa_stream_get_state((i)->play_stream) != PA_STREAM_READY) { \
 202     debug(DEBUG_LEVEL_NORMAL, __FILE__": Not connected: %s\n", (i)->context ? pa_strerror(pa_context_errno((i)->context)) : "NULL"); \
 203     goto label; \
 204 } \
 205 } while(0);
 206
 207 #define RECORD_STREAM_CHECK_DEAD_GOTO(i, label) do { \
 208 if (!(i)->context || pa_context_get_state((i)->context) != PA_CONTEXT_READY || \
 209     !(i)->rec_stream || pa_stream_get_state((i)->rec_stream) != PA_STREAM_READY) { \
 210     debug(DEBUG_LEVEL_NORMAL, __FILE__": Not connected: %s\n", (i)->context ? pa_strerror(pa_context_errno((i)->context)) : "NULL"); \
 211     goto label; \
 212 } \
 213 } while(0);
 214
 215 static void debug(int level, const char *format, ...) PA_GCC_PRINTF_ATTR(2,3);
 216
 217 #define DEBUG_LEVEL_ALWAYS              0
 218 #define DEBUG_LEVEL_NORMAL              1
 219 #define DEBUG_LEVEL_VERBOSE             2
 220
 221 static void debug(int level, const char *format, ...) {
 222     va_list ap;
 223     const char *dlevel_s;
 224     int dlevel;
 225
 226     dlevel_s = getenv("PADSP_DEBUG");
 227     if (!dlevel_s)
 228         return;
 229
 230     dlevel = atoi(dlevel_s);
 231
 232     if (dlevel < level)
 233         return;
 234
 235     va_start(ap, format);
 236     vfprintf(stderr, format, ap);
 237     va_end(ap);
 238 }
 239
 240 static int padsp_disabled(void) {
 241     static int *sym;
 242     static int sym_resolved = 0;
 243
 244     /* If the current process has a symbol __padsp_disabled__ we use
 245      * it to detect whether we should enable our stuff or not. A
 246      * program needs to be compiled with -rdynamic for this to work!
 247      * The symbol must be an int containing a three bit bitmask: bit 1
 248      * -> disable /dev/dsp emulation, bit 2 -> disable /dev/sndstat
 249      * emulation, bit 3 -> disable /dev/mixer emulation. Hence a value
 250      * of 7 disables padsp entirely. */
 251
 252     pthread_mutex_lock(&func_mutex);
 253     if (!sym_resolved) {
 254         sym = (int*) dlsym(RTLD_DEFAULT, "__padsp_disabled__");
 255         sym_resolved = 1;
 256
 257     }
 258     pthread_mutex_unlock(&func_mutex);
 259
 260     if (!sym)
 261         return 0;
 262
 263     return *sym;
 264 }
 265
 266 static int dsp_cloak_enable(void) {
 267     if (padsp_disabled() & 1)
 268         return 0;
 269
 270     if (getenv("PADSP_NO_DSP"))
 271         return 0;
 272
 273     return 1;
 274 }
 275
 276 static int sndstat_cloak_enable(void) {
 277     if (padsp_disabled() & 2)
 278         return 0;
 279
 280     if (getenv("PADSP_NO_SNDSTAT"))
 281         return 0;
 282
 283     return 1;
 284 }
 285
 286 static int mixer_cloak_enable(void) {
 287     if (padsp_disabled() & 4)
 288         return 0;
 289
 290     if (getenv("PADSP_NO_MIXER"))
 291         return 0;
 292
 293     return 1;
 294 }
 295 static pthread_key_t recursion_key;
 296
 297 static void recursion_key_alloc(void) {
 298     pthread_key_create(&recursion_key, NULL);
 299 }
 300
 301 static int function_enter(void) {
 302     /* Avoid recursive calls */
 303     static pthread_once_t recursion_key_once = PTHREAD_ONCE_INIT;
 304     pthread_once(&recursion_key_once, recursion_key_alloc);
 305
 306     if (pthread_getspecific(recursion_key))
 307         return 0;
 308
 309     pthread_setspecific(recursion_key, (void*) 1);
 310     return 1;
 311 }
 312
 313 static void function_exit(void) {
 314     pthread_setspecific(recursion_key, NULL);
 315 }
 316
 317 static void fd_info_free(fd_info *i) {
 318     assert(i);
 319
 320     debug(DEBUG_LEVEL_NORMAL, __FILE__": freeing fd info (fd=%i)\n", i->app_fd);
 321
 322     dsp_drain(i);
 323
 324     if (i->mainloop)
 325         pa_threaded_mainloop_stop(i->mainloop);
 326
 327     if (i->play_stream) {
 328         pa_stream_disconnect(i->play_stream);
 329         pa_stream_unref(i->play_stream);
 330     }
 331
 332     if (i->rec_stream) {
 333         pa_stream_disconnect(i->rec_stream);
 334         pa_stream_unref(i->rec_stream);
 335     }
 336
 337     if (i->context) {
 338         pa_context_disconnect(i->context);
 339         pa_context_unref(i->context);
 340     }
 341
 342     if (i->mainloop)
 343         pa_threaded_mainloop_free(i->mainloop);
 344
 345     if (i->app_fd >= 0) {
 346         LOAD_CLOSE_FUNC();
 347         _close(i->app_fd);
 348     }
 349
 350     if (i->thread_fd >= 0) {
 351         LOAD_CLOSE_FUNC();
 352         _close(i->thread_fd);
 353     }
 354
 355     free(i->buf);
 356
 357     pthread_mutex_destroy(&i->mutex);
 358     free(i);
 359 }
 360
 361 static fd_info *fd_info_ref(fd_info *i) {
 362     assert(i);
 363
 364     pthread_mutex_lock(&i->mutex);
 365     assert(i->ref >= 1);
 366     i->ref++;
 367
 368     debug(DEBUG_LEVEL_VERBOSE, __FILE__": ref++, now %i\n", i->ref);
 369     pthread_mutex_unlock(&i->mutex);
 370
 371     return i;
 372 }
 373
 374 static void fd_info_unref(fd_info *i) {
 375     int r;
 376     pthread_mutex_lock(&i->mutex);
 377     assert(i->ref >= 1);
 378     r = --i->ref;
 379         debug(DEBUG_LEVEL_VERBOSE, __FILE__": ref--, now %i\n", i->ref);
 380     pthread_mutex_unlock(&i->mutex);
 381
 382     if (r <= 0)
 383         fd_info_free(i);
 384 }
 385
 386 static void context_state_cb(pa_context *c, void *userdata) {
 387     fd_info *i = userdata;
 388     assert(c);
 389
 390     switch (pa_context_get_state(c)) {
 391         case PA_CONTEXT_READY:
 392         case PA_CONTEXT_TERMINATED:
 393         case PA_CONTEXT_FAILED:
 394             pa_threaded_mainloop_signal(i->mainloop, 0);
 395             break;
 396
 397         case PA_CONTEXT_UNCONNECTED:
 398         case PA_CONTEXT_CONNECTING:
 399         case PA_CONTEXT_AUTHORIZING:
 400         case PA_CONTEXT_SETTING_NAME:
 401             break;
 402     }
 403 }
 404
 405 static void reset_params(fd_info *i) {
 406     assert(i);
 407
 408     i->sample_spec.format = PA_SAMPLE_U8;
 409     i->sample_spec.channels = 1;
 410     i->sample_spec.rate = 8000;
 411     i->fragment_size = 0;
 412     i->n_fragments = 0;
 413 }
 414
 415 static const char *client_name(char *buf, size_t n) {
 416     char p[PATH_MAX];
 417     const char *e;
 418
 419     if ((e = getenv("PADSP_CLIENT_NAME")))
 420         return e;
 421
 422     if (pa_get_binary_name(p, sizeof(p)))
 423         snprintf(buf, n, "OSS Emulation[%s]", p);
 424     else
 425         snprintf(buf, n, "OSS");
 426
 427     return buf;
 428 }
 429
 430 static const char *stream_name(void) {
 431     const char *e;
 432
 433     if ((e = getenv("PADSP_STREAM_NAME")))
 434         return e;
 435
 436     return "Audio Stream";
 437 }
 438
 439 static void atfork_prepare(void) {
 440     fd_info *i;
 441
 442     debug(DEBUG_LEVEL_NORMAL, __FILE__": atfork_prepare() enter\n");
 443
 444     function_enter();
 445
 446     pthread_mutex_lock(&fd_infos_mutex);
 447
 448     for (i = fd_infos; i; i = i->next) {
 449         pthread_mutex_lock(&i->mutex);
 450         pa_threaded_mainloop_lock(i->mainloop);
 451     }
 452
 453     pthread_mutex_lock(&func_mutex);
 454
 455
 456     debug(DEBUG_LEVEL_NORMAL, __FILE__": atfork_prepare() exit\n");
 457 }
 458
 459 static void atfork_parent(void) {
 460     fd_info *i;
 461
 462     debug(DEBUG_LEVEL_NORMAL, __FILE__": atfork_parent() enter\n");
 463
 464     pthread_mutex_unlock(&func_mutex);
 465
 466     for (i = fd_infos; i; i = i->next) {
 467         pa_threaded_mainloop_unlock(i->mainloop);
 468         pthread_mutex_unlock(&i->mutex);
 469     }
 470
 471     pthread_mutex_unlock(&fd_infos_mutex);
 472
 473     function_exit();
 474
 475     debug(DEBUG_LEVEL_NORMAL, __FILE__": atfork_parent() exit\n");
 476 }
 477
 478 static void atfork_child(void) {
 479     fd_info *i;
 480
 481     debug(DEBUG_LEVEL_NORMAL, __FILE__": atfork_child() enter\n");
 482
 483     /* We do only the bare minimum to get all fds closed */
 484     pthread_mutex_init(&func_mutex, NULL);
 485     pthread_mutex_init(&fd_infos_mutex, NULL);
 486
 487     for (i = fd_infos; i; i = i->next) {
 488         pthread_mutex_init(&i->mutex, NULL);
 489
 490         if (i->context) {
 491             pa_context_disconnect(i->context);
 492             pa_context_unref(i->context);
 493             i->context = NULL;
 494         }
 495
 496         if (i->play_stream) {
 497             pa_stream_unref(i->play_stream);
 498             i->play_stream = NULL;
 499         }
 500
 501         if (i->rec_stream) {
 502             pa_stream_unref(i->rec_stream);
 503             i->rec_stream = NULL;
 504         }
 505
 506         if (i->app_fd >= 0) {
 507             close(i->app_fd);
 508             i->app_fd = -1;
 509         }
 510
 511         if (i->thread_fd >= 0) {
 512             close(i->thread_fd);
 513             i->thread_fd = -1;
 514         }
 515
 516         i->unusable = 1;
 517     }
 518
 519     function_exit();
 520
 521     debug(DEBUG_LEVEL_NORMAL, __FILE__": atfork_child() exit\n");
 522 }
 523
 524 static void install_atfork(void) {
 525     pthread_atfork(atfork_prepare, atfork_parent, atfork_child);
 526 }
 527
 528 static void stream_success_cb(pa_stream *s, int success, void *userdata) {
 529     fd_info *i = userdata;
 530
 531     assert(s);
 532     assert(i);
 533
 534     i->operation_success = success;
 535     pa_threaded_mainloop_signal(i->mainloop, 0);
 536 }
 537
 538 static void context_success_cb(pa_context *c, int success, void *userdata) {
 539     fd_info *i = userdata;
 540
 541     assert(c);
 542     assert(i);
 543
 544     i->operation_success = success;
 545     pa_threaded_mainloop_signal(i->mainloop, 0);
 546 }
 547
 548 static fd_info* fd_info_new(fd_info_type_t type, int *_errno) {
 549     fd_info *i;
 550     int sfds[2] = { -1, -1 };
 551     char name[64];
 552     static pthread_once_t install_atfork_once = PTHREAD_ONCE_INIT;
 553
 554     debug(DEBUG_LEVEL_NORMAL, __FILE__": fd_info_new()\n");
 555
 556     signal(SIGPIPE, SIG_IGN); /* Yes, ugly as hell */
 557
 558     pthread_once(&install_atfork_once, install_atfork);
 559
 560     if (!(i = malloc(sizeof(fd_info)))) {
 561         *_errno = ENOMEM;
 562         goto fail;
 563     }
 564
 565     i->app_fd = i->thread_fd = -1;
 566     i->type = type;
 567
 568     i->mainloop = NULL;
 569     i->context = NULL;
 570     i->play_stream = NULL;
 571     i->rec_stream = NULL;
 572     i->io_event = NULL;
 573     i->io_flags = 0;
 574     pthread_mutex_init(&i->mutex, NULL);
 575     i->ref = 1;
 576     i->buf = NULL;
 577     i->rec_offset = 0;
 578     i->unusable = 0;
 579     pa_cvolume_reset(&i->sink_volume, 2);
 580     pa_cvolume_reset(&i->source_volume, 2);
 581     i->volume_modify_count = 0;
 582     i->sink_index = (uint32_t) -1;
 583     i->source_index = (uint32_t) -1;
 584     i->optr_n_blocks = 0;
 585     PA_LLIST_INIT(fd_info, i);
 586
 587     reset_params(i);
 588
 589     if (socketpair(AF_UNIX, SOCK_STREAM, 0, sfds) < 0) {
 590         *_errno = errno;
 591         debug(DEBUG_LEVEL_NORMAL, __FILE__": socket() failed: %s\n", strerror(errno));
 592         goto fail;
 593     }
 594
 595     i->app_fd = sfds[0];
 596     i->thread_fd = sfds[1];
 597
 598     if (!(i->mainloop = pa_threaded_mainloop_new())) {
 599         *_errno = EIO;
 600         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_threaded_mainloop_new() failed\n");
 601         goto fail;
 602     }
 603
 604     if (!(i->context = pa_context_new(pa_threaded_mainloop_get_api(i->mainloop), client_name(name, sizeof(name))))) {
 605         *_errno = EIO;
 606         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_context_new() failed\n");
 607         goto fail;
 608     }
 609
 610     pa_context_set_state_callback(i->context, context_state_cb, i);
 611
 612     if (pa_context_connect(i->context, NULL, 0, NULL) < 0) {
 613         *_errno = ECONNREFUSED;
 614         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_context_connect() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 615         goto fail;
 616     }
 617
 618     pa_threaded_mainloop_lock(i->mainloop);
 619
 620     if (pa_threaded_mainloop_start(i->mainloop) < 0) {
 621         *_errno = EIO;
 622         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_threaded_mainloop_start() failed\n");
 623         goto unlock_and_fail;
 624     }
 625
 626     /* Wait until the context is ready */
 627     pa_threaded_mainloop_wait(i->mainloop);
 628
 629     if (pa_context_get_state(i->context) != PA_CONTEXT_READY) {
 630         *_errno = ECONNREFUSED;
 631         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_context_connect() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 632         goto unlock_and_fail;
 633     }
 634
 635     pa_threaded_mainloop_unlock(i->mainloop);
 636     return i;
 637
 638 unlock_and_fail:
 639
 640     pa_threaded_mainloop_unlock(i->mainloop);
 641
 642 fail:
 643
 644     if (i)
 645         fd_info_unref(i);
 646
 647     return NULL;
 648 }
 649
 650 static void fd_info_add_to_list(fd_info *i) {
 651     assert(i);
 652
 653     pthread_mutex_lock(&fd_infos_mutex);
 654     PA_LLIST_PREPEND(fd_info, fd_infos, i);
 655     pthread_mutex_unlock(&fd_infos_mutex);
 656
 657     fd_info_ref(i);
 658 }
 659
 660 static void fd_info_remove_from_list(fd_info *i) {
 661     assert(i);
 662
 663     pthread_mutex_lock(&fd_infos_mutex);
 664     PA_LLIST_REMOVE(fd_info, fd_infos, i);
 665     pthread_mutex_unlock(&fd_infos_mutex);
 666
 667     fd_info_unref(i);
 668 }
 669
 670 static fd_info* fd_info_find(int fd) {
 671     fd_info *i;
 672
 673     pthread_mutex_lock(&fd_infos_mutex);
 674
 675     for (i = fd_infos; i; i = i->next)
 676         if (i->app_fd == fd && !i->unusable) {
 677             fd_info_ref(i);
 678             break;
 679         }
 680
 681     pthread_mutex_unlock(&fd_infos_mutex);
 682
 683     return i;
 684 }
 685
 686 static void fix_metrics(fd_info *i) {
 687     size_t fs;
 688     char t[PA_SAMPLE_SPEC_SNPRINT_MAX];
 689
 690     fs = pa_frame_size(&i->sample_spec);
 691
 692     /* Don't fix things more than necessary */
 693     if ((i->fragment_size % fs) == 0 &&
 694         i->n_fragments >= 2 &&
 695         i->fragment_size > 0)
 696         return;
 697
 698     i->fragment_size = (i->fragment_size/fs)*fs;
 699
 700     /* Number of fragments set? */
 701     if (i->n_fragments < 2) {
 702         if (i->fragment_size > 0) {
 703             i->n_fragments = pa_bytes_per_second(&i->sample_spec) / 2 / i->fragment_size;
 704             if (i->n_fragments < 2)
 705                 i->n_fragments = 2;
 706         } else
 707             i->n_fragments = 12;
 708     }
 709
 710     /* Fragment size set? */
 711     if (i->fragment_size <= 0) {
 712         i->fragment_size = pa_bytes_per_second(&i->sample_spec) / 2 / i->n_fragments;
 713         if (i->fragment_size < 1024)
 714             i->fragment_size = 1024;
 715     }
 716
 717     debug(DEBUG_LEVEL_NORMAL, __FILE__": sample spec: %s\n", pa_sample_spec_snprint(t, sizeof(t), &i->sample_spec));
 718     debug(DEBUG_LEVEL_NORMAL, __FILE__": fixated metrics to %i fragments, %li bytes each.\n", i->n_fragments, (long)i->fragment_size);
 719 }
 720
 721 static void stream_request_cb(pa_stream *s, size_t length, void *userdata) {
 722     fd_info *i = userdata;
 723     assert(s);
 724
 725     if (i->io_event) {
 726         pa_mainloop_api *api;
 727         size_t n;
 728
 729         api = pa_threaded_mainloop_get_api(i->mainloop);
 730
 731         if (s == i->play_stream) {
 732             n = pa_stream_writable_size(i->play_stream);
 733             if (n == (size_t)-1) {
 734                 debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_writable_size(): %s\n",
 735                     pa_strerror(pa_context_errno(i->context)));
 736             }
 737
 738             if (n >= i->fragment_size)
 739                 i->io_flags |= PA_IO_EVENT_INPUT;
 740             else
 741                 i->io_flags &= ~PA_IO_EVENT_INPUT;
 742         }
 743
 744         if (s == i->rec_stream) {
 745             n = pa_stream_readable_size(i->rec_stream);
 746             if (n == (size_t)-1) {
 747                 debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_readable_size(): %s\n",
 748                     pa_strerror(pa_context_errno(i->context)));
 749             }
 750
 751             if (n >= i->fragment_size)
 752                 i->io_flags |= PA_IO_EVENT_OUTPUT;
 753             else
 754                 i->io_flags &= ~PA_IO_EVENT_OUTPUT;
 755         }
 756
 757         api->io_enable(i->io_event, i->io_flags);
 758     }
 759 }
 760
 761 static void stream_latency_update_cb(pa_stream *s, void *userdata) {
 762     fd_info *i = userdata;
 763     assert(s);
 764
 765     pa_threaded_mainloop_signal(i->mainloop, 0);
 766 }
 767
 768 static void fd_info_shutdown(fd_info *i) {
 769     assert(i);
 770
 771     if (i->io_event) {
 772         pa_mainloop_api *api;
 773         api = pa_threaded_mainloop_get_api(i->mainloop);
 774         api->io_free(i->io_event);
 775         i->io_event = NULL;
 776         i->io_flags = 0;
 777     }
 778
 779     if (i->thread_fd >= 0) {
 780         close(i->thread_fd);
 781         i->thread_fd = -1;
 782     }
 783 }
 784
 785 static int fd_info_copy_data(fd_info *i, int force) {
 786     size_t n;
 787
 788     if (!i->play_stream && !i->rec_stream)
 789         return -1;
 790
 791     if ((i->play_stream) && (pa_stream_get_state(i->play_stream) == PA_STREAM_READY)) {
 792         n = pa_stream_writable_size(i->play_stream);
 793
 794         if (n == (size_t)-1) {
 795             debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_writable_size(): %s\n",
 796                 pa_strerror(pa_context_errno(i->context)));
 797             return -1;
 798         }
 799
 800         while (n >= i->fragment_size || force) {
 801             ssize_t r;
 802
 803             if (!i->buf) {
 804                 if (!(i->buf = malloc(i->fragment_size))) {
 805                     debug(DEBUG_LEVEL_NORMAL, __FILE__": malloc() failed.\n");
 806                     return -1;
 807                 }
 808             }
 809
 810             if ((r = read(i->thread_fd, i->buf, i->fragment_size)) <= 0) {
 811
 812                 if (errno == EAGAIN)
 813                     break;
 814
 815                 debug(DEBUG_LEVEL_NORMAL, __FILE__": read(): %s\n", r == 0 ? "EOF" : strerror(errno));
 816                 return -1;
 817             }
 818
 819             if (pa_stream_write(i->play_stream, i->buf, r, free, 0, PA_SEEK_RELATIVE) < 0) {
 820                 debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_write(): %s\n", pa_strerror(pa_context_errno(i->context)));
 821                 return -1;
 822             }
 823
 824             i->buf = NULL;
 825
 826             assert(n >= (size_t) r);
 827             n -= r;
 828         }
 829
 830         if (n >= i->fragment_size)
 831             i->io_flags |= PA_IO_EVENT_INPUT;
 832         else
 833             i->io_flags &= ~PA_IO_EVENT_INPUT;
 834     }
 835
 836     if ((i->rec_stream) && (pa_stream_get_state(i->rec_stream) == PA_STREAM_READY)) {
 837         n = pa_stream_readable_size(i->rec_stream);
 838
 839         if (n == (size_t)-1) {
 840             debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_readable_size(): %s\n",
 841                 pa_strerror(pa_context_errno(i->context)));
 842             return -1;
 843         }
 844
 845         while (n >= i->fragment_size || force) {
 846             ssize_t r;
 847             const void *data;
 848             const char *buf;
 849             size_t len;
 850
 851             if (pa_stream_peek(i->rec_stream, &data, &len) < 0) {
 852                 debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_peek(): %s\n", pa_strerror(pa_context_errno(i->context)));
 853                 return -1;
 854             }
 855
 856             if (!data)
 857                 break;
 858
 859             buf = (const char*)data + i->rec_offset;
 860
 861             if ((r = write(i->thread_fd, buf, len - i->rec_offset)) <= 0) {
 862
 863                 if (errno == EAGAIN)
 864                     break;
 865
 866                 debug(DEBUG_LEVEL_NORMAL, __FILE__": write(): %s\n", strerror(errno));
 867                 return -1;
 868             }
 869
 870             assert((size_t)r <= len - i->rec_offset);
 871             i->rec_offset += r;
 872
 873             if (i->rec_offset == len) {
 874                 if (pa_stream_drop(i->rec_stream) < 0) {
 875                     debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_drop(): %s\n", pa_strerror(pa_context_errno(i->context)));
 876                     return -1;
 877                 }
 878                 i->rec_offset = 0;
 879             }
 880
 881             assert(n >= (size_t) r);
 882             n -= r;
 883         }
 884
 885         if (n >= i->fragment_size)
 886             i->io_flags |= PA_IO_EVENT_OUTPUT;
 887         else
 888             i->io_flags &= ~PA_IO_EVENT_OUTPUT;
 889     }
 890
 891     if (i->io_event) {
 892         pa_mainloop_api *api;
 893
 894         api = pa_threaded_mainloop_get_api(i->mainloop);
 895         api->io_enable(i->io_event, i->io_flags);
 896     }
 897
 898     return 0;
 899 }
 900
 901 static void stream_state_cb(pa_stream *s, void * userdata) {
 902     fd_info *i = userdata;
 903     assert(s);
 904
 905     switch (pa_stream_get_state(s)) {
 906
 907         case PA_STREAM_READY:
 908             debug(DEBUG_LEVEL_NORMAL, __FILE__": stream established.\n");
 909             break;
 910
 911         case PA_STREAM_FAILED:
 912             if (s == i->play_stream) {
 913                 debug(DEBUG_LEVEL_NORMAL,
 914                     __FILE__": pa_stream_connect_playback() failed: %s\n",
 915                     pa_strerror(pa_context_errno(i->context)));
 916                 pa_stream_unref(i->play_stream);
 917                 i->play_stream = NULL;
 918             } else if (s == i->rec_stream) {
 919                 debug(DEBUG_LEVEL_NORMAL,
 920                     __FILE__": pa_stream_connect_record() failed: %s\n",
 921                     pa_strerror(pa_context_errno(i->context)));
 922                 pa_stream_unref(i->rec_stream);
 923                 i->rec_stream = NULL;
 924             }
 925             fd_info_shutdown(i);
 926             break;
 927
 928         case PA_STREAM_TERMINATED:
 929         case PA_STREAM_UNCONNECTED:
 930         case PA_STREAM_CREATING:
 931             break;
 932     }
 933 }
 934
 935 static int create_playback_stream(fd_info *i) {
 936     pa_buffer_attr attr;
 937     int n;
 938
 939     assert(i);
 940
 941     fix_metrics(i);
 942
 943     if (!(i->play_stream = pa_stream_new(i->context, stream_name(), &i->sample_spec, NULL))) {
 944         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_new() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 945         goto fail;
 946     }
 947
 948     pa_stream_set_state_callback(i->play_stream, stream_state_cb, i);
 949     pa_stream_set_write_callback(i->play_stream, stream_request_cb, i);
 950     pa_stream_set_latency_update_callback(i->play_stream, stream_latency_update_cb, i);
 951
 952     memset(&attr, 0, sizeof(attr));
 953     attr.maxlength = i->fragment_size * (i->n_fragments+1);
 954     attr.tlength = i->fragment_size * i->n_fragments;
 955     attr.prebuf = i->fragment_size;
 956     attr.minreq = i->fragment_size;
 957
 958     if (pa_stream_connect_playback(i->play_stream, NULL, &attr, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL) < 0) {
 959         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_connect_playback() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 960         goto fail;
 961     }
 962
 963     n = i->fragment_size;
 964     setsockopt(i->app_fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n));
 965     n = i->fragment_size;
 966     setsockopt(i->thread_fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n));
 967
 968     return 0;
 969
 970 fail:
 971     return -1;
 972 }
 973
 974 static int create_record_stream(fd_info *i) {
 975     pa_buffer_attr attr;
 976     int n;
 977
 978     assert(i);
 979
 980     fix_metrics(i);
 981
 982     if (!(i->rec_stream = pa_stream_new(i->context, stream_name(), &i->sample_spec, NULL))) {
 983         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_new() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 984         goto fail;
 985     }
 986
 987     pa_stream_set_state_callback(i->rec_stream, stream_state_cb, i);
 988     pa_stream_set_read_callback(i->rec_stream, stream_request_cb, i);
 989     pa_stream_set_latency_update_callback(i->rec_stream, stream_latency_update_cb, i);
 990
 991     memset(&attr, 0, sizeof(attr));
 992     attr.maxlength = i->fragment_size * (i->n_fragments+1);
 993     attr.fragsize = i->fragment_size;
 994
 995     if (pa_stream_connect_record(i->rec_stream, NULL, &attr, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE) < 0) {
 996         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_connect_record() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 997         goto fail;
 998     }
 999
1000     n = i->fragment_size;
1001     setsockopt(i->app_fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n));
1002     n = i->fragment_size;
1003     setsockopt(i->thread_fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n));
1004
1005     return 0;
1006
1007 fail:
1008     return -1;
1009 }
1010
1011 static void free_streams(fd_info *i) {
1012     assert(i);
1013
1014     if (i->play_stream) {
1015         pa_stream_disconnect(i->play_stream);
1016         pa_stream_unref(i->play_stream);
1017         i->play_stream = NULL;
1018         i->io_flags |= PA_IO_EVENT_INPUT;
1019     }
1020
1021     if (i->rec_stream) {
1022         pa_stream_disconnect(i->rec_stream);
1023         pa_stream_unref(i->rec_stream);
1024         i->rec_stream = NULL;
1025         i->io_flags |= PA_IO_EVENT_OUTPUT;
1026     }
1027
1028     if (i->io_event) {
1029         pa_mainloop_api *api;
1030
1031         api = pa_threaded_mainloop_get_api(i->mainloop);
1032         api->io_enable(i->io_event, i->io_flags);
1033     }
1034 }
1035
1036 static void io_event_cb(pa_mainloop_api *api, pa_io_event *e, int fd, pa_io_event_flags_t flags, void *userdata) {
1037     fd_info *i = userdata;
1038
1039     pa_threaded_mainloop_signal(i->mainloop, 0);
1040
1041     if (flags & PA_IO_EVENT_INPUT) {
1042
1043         if (!i->play_stream) {
1044             if (create_playback_stream(i) < 0)
1045                 goto fail;
1046         } else {
1047             if (fd_info_copy_data(i, 0) < 0)
1048                 goto fail;
1049         }
1050
1051     } else if (flags & PA_IO_EVENT_OUTPUT) {
1052
1053         if (!i->rec_stream) {
1054             if (create_record_stream(i) < 0)
1055                 goto fail;
1056         } else {
1057             if (fd_info_copy_data(i, 0) < 0)
1058                 goto fail;
1059         }
1060
1061     } else if (flags & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR))
1062         goto fail;
1063
1064     return;
1065
1066 fail:
1067     /* We can't do anything better than removing the event source */
1068     fd_info_shutdown(i);
1069 }
1070
1071 static int dsp_open(int flags, int *_errno) {
1072     fd_info *i;
1073     pa_mainloop_api *api;
1074     int ret;
1075     int f;
1076
1077     debug(DEBUG_LEVEL_NORMAL, __FILE__": dsp_open()\n");
1078
1079     if (!(i = fd_info_new(FD_INFO_STREAM, _errno)))
1080         return -1;
1081
1082     if ((flags & O_NONBLOCK) == O_NONBLOCK) {
1083         if ((f = fcntl(i->app_fd, F_GETFL)) >= 0)
1084             fcntl(i->app_fd, F_SETFL, f|O_NONBLOCK);
1085     }
1086     if ((f = fcntl(i->thread_fd, F_GETFL)) >= 0)
1087         fcntl(i->thread_fd, F_SETFL, f|O_NONBLOCK);
1088
1089     fcntl(i->app_fd, F_SETFD, FD_CLOEXEC);
1090     fcntl(i->thread_fd, F_SETFD, FD_CLOEXEC);
1091
1092     pa_threaded_mainloop_lock(i->mainloop);
1093     api = pa_threaded_mainloop_get_api(i->mainloop);
1094
1095     switch (flags & O_ACCMODE) {
1096     case O_RDONLY:
1097         i->io_flags = PA_IO_EVENT_OUTPUT;
1098         shutdown(i->thread_fd, SHUT_RD);
1099         shutdown(i->app_fd, SHUT_WR);
1100         break;
1101     case O_WRONLY:
1102         i->io_flags = PA_IO_EVENT_INPUT;
1103         shutdown(i->thread_fd, SHUT_WR);
1104         shutdown(i->app_fd, SHUT_RD);
1105         break;
1106     case O_RDWR:
1107         i->io_flags = PA_IO_EVENT_INPUT | PA_IO_EVENT_OUTPUT;
1108         break;
1109     default:
1110         return -1;
1111     }
1112
1113     if (!(i->io_event = api->io_new(api, i->thread_fd, i->io_flags, io_event_cb, i)))
1114         goto fail;
1115
1116     pa_threaded_mainloop_unlock(i->mainloop);
1117
1118     debug(DEBUG_LEVEL_NORMAL, __FILE__": dsp_open() succeeded, fd=%i\n", i->app_fd);
1119
1120     fd_info_add_to_list(i);
1121     ret = i->app_fd;
1122     fd_info_unref(i);
1123
1124     return ret;
1125
1126 fail:
1127     pa_threaded_mainloop_unlock(i->mainloop);
1128
1129     if (i)
1130         fd_info_unref(i);
1131
1132     *_errno = EIO;
1133
1134     debug(DEBUG_LEVEL_NORMAL, __FILE__": dsp_open() failed\n");
1135
1136     return -1;
1137 }
1138
1139 static void sink_info_cb(pa_context *context, const pa_sink_info *si, int eol, void *userdata) {
1140     fd_info *i = userdata;
1141
1142     if (!si && eol < 0) {
1143         i->operation_success = 0;
1144         pa_threaded_mainloop_signal(i->mainloop, 0);
1145         return;
1146     }
1147
1148     if (eol)
1149         return;
1150
1151     if (!pa_cvolume_equal(&i->sink_volume, &si->volume))
1152         i->volume_modify_count++;
1153
1154     i->sink_volume = si->volume;
1155     i->sink_index = si->index;
1156
1157     i->operation_success = 1;
1158     pa_threaded_mainloop_signal(i->mainloop, 0);
1159 }
1160
1161 static void source_info_cb(pa_context *context, const pa_source_info *si, int eol, void *userdata) {
1162     fd_info *i = userdata;
1163
1164     if (!si && eol < 0) {
1165         i->operation_success = 0;
1166         pa_threaded_mainloop_signal(i->mainloop, 0);
1167         return;
1168     }
1169
1170     if (eol)
1171         return;
1172
1173     if (!pa_cvolume_equal(&i->source_volume, &si->volume))
1174         i->volume_modify_count++;
1175
1176     i->source_volume = si->volume;
1177     i->source_index = si->index;
1178
1179     i->operation_success = 1;
1180     pa_threaded_mainloop_signal(i->mainloop, 0);
1181 }
1182
1183 static void subscribe_cb(pa_context *context, pa_subscription_event_type_t t, uint32_t idx, void *userdata) {
1184     fd_info *i = userdata;
1185     pa_operation *o = NULL;
1186
1187     if (i->sink_index != idx)
1188         return;
1189
1190     if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) != PA_SUBSCRIPTION_EVENT_CHANGE)
1191         return;
1192
1193     if (!(o = pa_context_get_sink_info_by_index(i->context, i->sink_index, sink_info_cb, i))) {
1194         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get sink info: %s", pa_strerror(pa_context_errno(i->context)));
1195         return;
1196     }
1197
1198     pa_operation_unref(o);
1199 }
1200
1201 static int mixer_open(int flags, int *_errno) {
1202     fd_info *i;
1203     pa_operation *o = NULL;
1204     int ret;
1205
1206     debug(DEBUG_LEVEL_NORMAL, __FILE__": mixer_open()\n");
1207
1208     if (!(i = fd_info_new(FD_INFO_MIXER, _errno)))
1209         return -1;
1210
1211     pa_threaded_mainloop_lock(i->mainloop);
1212
1213     pa_context_set_subscribe_callback(i->context, subscribe_cb, i);
1214
1215     if (!(o = pa_context_subscribe(i->context, PA_SUBSCRIPTION_MASK_SINK | PA_SUBSCRIPTION_MASK_SOURCE, context_success_cb, i))) {
1216         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to subscribe to events: %s", pa_strerror(pa_context_errno(i->context)));
1217         *_errno = EIO;
1218         goto fail;
1219     }
1220
1221     i->operation_success = 0;
1222     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1223         pa_threaded_mainloop_wait(i->mainloop);
1224         CONTEXT_CHECK_DEAD_GOTO(i, fail);
1225     }
1226
1227     pa_operation_unref(o);
1228     o = NULL;
1229
1230     if (!i->operation_success) {
1231         debug(DEBUG_LEVEL_NORMAL, __FILE__":Failed to subscribe to events: %s", pa_strerror(pa_context_errno(i->context)));
1232         *_errno = EIO;
1233         goto fail;
1234     }
1235
1236     /* Get sink info */
1237
1238     if (!(o = pa_context_get_sink_info_by_name(i->context, NULL, sink_info_cb, i))) {
1239         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get sink info: %s", pa_strerror(pa_context_errno(i->context)));
1240         *_errno = EIO;
1241         goto fail;
1242     }
1243
1244     i->operation_success = 0;
1245     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1246         pa_threaded_mainloop_wait(i->mainloop);
1247         CONTEXT_CHECK_DEAD_GOTO(i, fail);
1248     }
1249
1250     pa_operation_unref(o);
1251     o = NULL;
1252
1253     if (!i->operation_success) {
1254         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get sink info: %s", pa_strerror(pa_context_errno(i->context)));
1255         *_errno = EIO;
1256         goto fail;
1257     }
1258
1259     /* Get source info */
1260
1261     if (!(o = pa_context_get_source_info_by_name(i->context, NULL, source_info_cb, i))) {
1262         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get source info: %s", pa_strerror(pa_context_errno(i->context)));
1263         *_errno = EIO;
1264         goto fail;
1265     }
1266
1267     i->operation_success = 0;
1268     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1269         pa_threaded_mainloop_wait(i->mainloop);
1270         CONTEXT_CHECK_DEAD_GOTO(i, fail);
1271     }
1272
1273     pa_operation_unref(o);
1274     o = NULL;
1275
1276     if (!i->operation_success) {
1277         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get source info: %s", pa_strerror(pa_context_errno(i->context)));
1278         *_errno = EIO;
1279         goto fail;
1280     }
1281
1282     pa_threaded_mainloop_unlock(i->mainloop);
1283
1284     debug(DEBUG_LEVEL_NORMAL, __FILE__": mixer_open() succeeded, fd=%i\n", i->app_fd);
1285
1286     fd_info_add_to_list(i);
1287     ret = i->app_fd;
1288     fd_info_unref(i);
1289
1290     return ret;
1291
1292 fail:
1293     if (o)
1294         pa_operation_unref(o);
1295
1296     pa_threaded_mainloop_unlock(i->mainloop);
1297
1298     if (i)
1299         fd_info_unref(i);
1300
1301     *_errno = EIO;
1302
1303     debug(DEBUG_LEVEL_NORMAL, __FILE__": mixer_open() failed\n");
1304
1305     return -1;
1306 }
1307
1308 static int sndstat_open(int flags, int *_errno) {
1309     static const char sndstat[] =
1310         "Sound Driver:3.8.1a-980706 (PulseAudio Virtual OSS)\n"
1311         "Kernel: POSIX\n"
1312         "Config options: 0\n"
1313         "\n"
1314         "Installed drivers:\n"
1315         "Type 255: PulseAudio Virtual OSS\n"
1316         "\n"
1317         "Card config:\n"
1318         "PulseAudio Virtual OSS\n"
1319         "\n"
1320         "Audio devices:\n"
1321         "0: PulseAudio Virtual OSS\n"
1322         "\n"
1323         "Synth devices: NOT ENABLED IN CONFIG\n"
1324         "\n"
1325         "Midi devices:\n"
1326         "\n"
1327         "Timers:\n"
1328         "\n"
1329         "Mixers:\n"
1330         "0: PulseAudio Virtual OSS\n";
1331
1332     char fn[] = "/tmp/padsp-sndstat-XXXXXX";
1333     mode_t u;
1334     int fd = -1;
1335     int e;
1336
1337     debug(DEBUG_LEVEL_NORMAL, __FILE__": sndstat_open()\n");
1338
1339     if (flags != O_RDONLY
1340 #ifdef O_LARGEFILE
1341         && flags != (O_RDONLY|O_LARGEFILE)
1342 #endif
1343        ) {
1344         *_errno = EACCES;
1345         debug(DEBUG_LEVEL_NORMAL, __FILE__": bad access!\n");
1346         goto fail;
1347     }
1348
1349     u = umask(0077);
1350     fd = mkstemp(fn);
1351     e = errno;
1352     umask(u);
1353
1354     if (fd < 0) {
1355         *_errno = e;
1356         debug(DEBUG_LEVEL_NORMAL, __FILE__": mkstemp() failed: %s\n", strerror(errno));
1357         goto fail;
1358     }
1359
1360     unlink(fn);
1361
1362     if (write(fd, sndstat, sizeof(sndstat) -1) != sizeof(sndstat)-1) {
1363         *_errno = errno;
1364         debug(DEBUG_LEVEL_NORMAL, __FILE__": write() failed: %s\n", strerror(errno));
1365         goto fail;
1366     }
1367
1368     if (lseek(fd, SEEK_SET, 0) < 0) {
1369         *_errno = errno;
1370         debug(DEBUG_LEVEL_NORMAL, __FILE__": lseek() failed: %s\n", strerror(errno));
1371         goto fail;
1372     }
1373
1374     return fd;
1375
1376 fail:
1377     if (fd >= 0)
1378         close(fd);
1379     return -1;
1380 }
1381
1382 int open(const char *filename, int flags, ...) {
1383     va_list args;
1384     mode_t mode = 0;
1385     int r, _errno = 0;
1386
1387     debug(DEBUG_LEVEL_VERBOSE, __FILE__": open(%s)\n", filename);
1388
1389     va_start(args, flags);
1390     if (flags & O_CREAT) {
1391       if (sizeof(mode_t) < sizeof(int))
1392         mode = va_arg(args, int);
1393       else
1394         mode = va_arg(args, mode_t);
1395     }
1396     va_end(args);
1397
1398     if (!function_enter()) {
1399         LOAD_OPEN_FUNC();
1400         return _open(filename, flags, mode);
1401     }
1402
1403     if (dsp_cloak_enable() && (strcmp(filename, "/dev/dsp") == 0 || strcmp(filename, "/dev/adsp") == 0)) {
1404         r = dsp_open(flags, &_errno);
1405     } else if (mixer_cloak_enable() && strcmp(filename, "/dev/mixer") == 0) {
1406         r = mixer_open(flags, &_errno);
1407     } else if (sndstat_cloak_enable() && strcmp(filename, "/dev/sndstat") == 0) {
1408         r = sndstat_open(flags, &_errno);
1409     } else {
1410         function_exit();
1411         LOAD_OPEN_FUNC();
1412         return _open(filename, flags, mode);
1413     }
1414
1415     function_exit();
1416
1417     if (_errno)
1418         errno = _errno;
1419
1420     return r;
1421 }
1422
1423 static int mixer_ioctl(fd_info *i, unsigned long request, void*argp, int *_errno) {
1424     int ret = -1;
1425
1426     switch (request) {
1427         case SOUND_MIXER_READ_DEVMASK :
1428             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_DEVMASK\n");
1429
1430             *(int*) argp = SOUND_MASK_PCM | SOUND_MASK_IGAIN;
1431             break;
1432
1433         case SOUND_MIXER_READ_RECMASK :
1434             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_RECMASK\n");
1435
1436             *(int*) argp = SOUND_MASK_IGAIN;
1437             break;
1438
1439         case SOUND_MIXER_READ_STEREODEVS:
1440             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_STEREODEVS\n");
1441
1442             pa_threaded_mainloop_lock(i->mainloop);
1443             *(int*) argp = 0;
1444             if (i->sink_volume.channels > 1)
1445                 *(int*) argp |= SOUND_MASK_PCM;
1446             if (i->source_volume.channels > 1)
1447                 *(int*) argp |= SOUND_MASK_IGAIN;
1448             pa_threaded_mainloop_unlock(i->mainloop);
1449
1450             break;
1451
1452         case SOUND_MIXER_READ_RECSRC:
1453             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_RECSRC\n");
1454
1455             *(int*) argp = SOUND_MASK_IGAIN;
1456             break;
1457
1458         case SOUND_MIXER_WRITE_RECSRC:
1459             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_WRITE_RECSRC\n");
1460             break;
1461
1462         case SOUND_MIXER_READ_CAPS:
1463             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_CAPS\n");
1464
1465             *(int*) argp = 0;
1466             break;
1467
1468         case SOUND_MIXER_READ_PCM:
1469         case SOUND_MIXER_READ_IGAIN: {
1470             pa_cvolume *v;
1471
1472             if (request == SOUND_MIXER_READ_PCM)
1473                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_PCM\n");
1474             else
1475                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_IGAIN\n");
1476
1477             pa_threaded_mainloop_lock(i->mainloop);
1478
1479             if (request == SOUND_MIXER_READ_PCM)
1480                 v = &i->sink_volume;
1481             else
1482                 v = &i->source_volume;
1483
1484             *(int*) argp =
1485                 ((v->values[0]*100/PA_VOLUME_NORM)) |
1486                 ((v->values[v->channels > 1 ? 1 : 0]*100/PA_VOLUME_NORM)  << 8);
1487
1488             pa_threaded_mainloop_unlock(i->mainloop);
1489
1490             break;
1491         }
1492
1493         case SOUND_MIXER_WRITE_PCM:
1494         case SOUND_MIXER_WRITE_IGAIN: {
1495             pa_cvolume v, *pv;
1496
1497             if (request == SOUND_MIXER_READ_PCM)
1498                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_WRITE_PCM\n");
1499             else
1500                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_WRITE_IGAIN\n");
1501
1502             pa_threaded_mainloop_lock(i->mainloop);
1503
1504             if (request == SOUND_MIXER_READ_PCM) {
1505                 v = i->sink_volume;
1506                 pv = &i->sink_volume;
1507             } else {
1508                 v = i->source_volume;
1509                 pv = &i->source_volume;
1510             }
1511
1512             pv->values[0] = ((*(int*) argp & 0xFF)*PA_VOLUME_NORM)/100;
1513             pv->values[1] = ((*(int*) argp >> 8)*PA_VOLUME_NORM)/100;
1514
1515             if (!pa_cvolume_equal(pv, &v)) {
1516                 pa_operation *o;
1517
1518                 if (request == SOUND_MIXER_READ_PCM)
1519                     o = pa_context_set_sink_volume_by_index(i->context, i->sink_index, pv, context_success_cb, i);
1520                 else
1521                     o = pa_context_set_source_volume_by_index(i->context, i->source_index, pv, context_success_cb, i);
1522
1523                 if (!o)
1524                     debug(DEBUG_LEVEL_NORMAL, __FILE__":Failed set volume: %s", pa_strerror(pa_context_errno(i->context)));
1525                 else {
1526
1527                     i->operation_success = 0;
1528                     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1529                         CONTEXT_CHECK_DEAD_GOTO(i, exit_loop);
1530
1531                         pa_threaded_mainloop_wait(i->mainloop);
1532                     }
1533                 exit_loop:
1534
1535                     if (!i->operation_success)
1536                         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to set volume: %s\n", pa_strerror(pa_context_errno(i->context)));
1537
1538                     pa_operation_unref(o);
1539                 }
1540
1541                 /* We don't wait for completion here */
1542                 i->volume_modify_count++;
1543             }
1544
1545             pa_threaded_mainloop_unlock(i->mainloop);
1546
1547             break;
1548         }
1549
1550         case SOUND_MIXER_INFO: {
1551             mixer_info *mi = argp;
1552
1553             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_INFO\n");
1554
1555             memset(mi, 0, sizeof(mixer_info));
1556             strncpy(mi->id, "PULSEAUDIO", sizeof(mi->id));
1557             strncpy(mi->name, "PulseAudio Virtual OSS", sizeof(mi->name));
1558             pa_threaded_mainloop_lock(i->mainloop);
1559             mi->modify_counter = i->volume_modify_count;
1560             pa_threaded_mainloop_unlock(i->mainloop);
1561             break;
1562         }
1563
1564         default:
1565             debug(DEBUG_LEVEL_NORMAL, __FILE__": unknown ioctl 0x%08lx\n", request);
1566
1567             *_errno = EINVAL;
1568             goto fail;
1569     }
1570
1571     ret = 0;
1572
1573 fail:
1574
1575     return ret;
1576 }
1577
1578 static int map_format(int *fmt, pa_sample_spec *ss) {
1579
1580     switch (*fmt) {
1581         case AFMT_MU_LAW:
1582             ss->format = PA_SAMPLE_ULAW;
1583             break;
1584
1585         case AFMT_A_LAW:
1586             ss->format = PA_SAMPLE_ALAW;
1587             break;
1588
1589         case AFMT_S8:
1590             *fmt = AFMT_U8;
1591             /* fall through */
1592         case AFMT_U8:
1593             ss->format = PA_SAMPLE_U8;
1594             break;
1595
1596         case AFMT_U16_BE:
1597             *fmt = AFMT_S16_BE;
1598             /* fall through */
1599         case AFMT_S16_BE:
1600             ss->format = PA_SAMPLE_S16BE;
1601             break;
1602
1603         case AFMT_U16_LE:
1604             *fmt = AFMT_S16_LE;
1605             /* fall through */
1606         case AFMT_S16_LE:
1607             ss->format = PA_SAMPLE_S16LE;
1608             break;
1609
1610         default:
1611             ss->format = PA_SAMPLE_S16NE;
1612             *fmt = AFMT_S16_NE;
1613             break;
1614     }
1615
1616     return 0;
1617 }
1618
1619 static int map_format_back(pa_sample_format_t format) {
1620     switch (format) {
1621         case PA_SAMPLE_S16LE: return AFMT_S16_LE;
1622         case PA_SAMPLE_S16BE: return AFMT_S16_BE;
1623         case PA_SAMPLE_ULAW: return AFMT_MU_LAW;
1624         case PA_SAMPLE_ALAW: return AFMT_A_LAW;
1625         case PA_SAMPLE_U8: return AFMT_U8;
1626         default:
1627             abort();
1628     }
1629 }
1630
1631 static int dsp_flush_fd(int fd) {
1632 #ifdef SIOCINQ
1633     int l;
1634
1635     if (ioctl(fd, SIOCINQ, &l) < 0) {
1636         debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ: %s\n", strerror(errno));
1637         return -1;
1638     }
1639
1640     while (l > 0) {
1641         char buf[1024];
1642         size_t k;
1643
1644         k = (size_t) l > sizeof(buf) ? sizeof(buf) : (size_t) l;
1645         if (read(fd, buf, k) < 0)
1646             debug(DEBUG_LEVEL_NORMAL, __FILE__": read(): %s\n", strerror(errno));
1647         l -= k;
1648     }
1649
1650     return 0;
1651 #else
1652 # warning "Your platform does not support SIOCINQ, something might not work as intended."
1653     return 0;
1654 #endif
1655 }
1656
1657 static int dsp_flush_socket(fd_info *i) {
1658     int res = 0;
1659
1660     if ((i->thread_fd < 0) && (i->app_fd < 0))
1661         return -1;
1662
1663     if (i->thread_fd >= 0)
1664         res = dsp_flush_fd(i->thread_fd);
1665
1666     if (res < 0)
1667         return res;
1668
1669     if (i->app_fd >= 0)
1670         res = dsp_flush_fd(i->app_fd);
1671
1672     if (res < 0)
1673         return res;
1674
1675     return 0;
1676 }
1677
1678 static int dsp_empty_socket(fd_info *i) {
1679 #ifdef SIOCINQ
1680     int ret = -1;
1681
1682     /* Empty the socket */
1683     for (;;) {
1684         int l;
1685
1686         if (i->thread_fd < 0)
1687             break;
1688
1689         if (ioctl(i->thread_fd, SIOCINQ, &l) < 0) {
1690             debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ: %s\n", strerror(errno));
1691             break;
1692         }
1693
1694         if (!l) {
1695             ret = 0;
1696             break;
1697         }
1698
1699         pa_threaded_mainloop_wait(i->mainloop);
1700     }
1701
1702     return ret;
1703 #else
1704 # warning "Your platform does not support SIOCINQ, something might not work as intended."
1705     return 0;
1706 #endif
1707 }
1708
1709 static int dsp_drain(fd_info *i) {
1710     pa_operation *o = NULL;
1711     int r = -1;
1712
1713     if (!i->mainloop)
1714         return 0;
1715
1716     debug(DEBUG_LEVEL_NORMAL, __FILE__": Draining.\n");
1717
1718     pa_threaded_mainloop_lock(i->mainloop);
1719
1720     if (dsp_empty_socket(i) < 0)
1721         goto fail;
1722
1723     if (!i->play_stream)
1724         goto fail;
1725
1726     debug(DEBUG_LEVEL_NORMAL, __FILE__": Really draining.\n");
1727
1728     if (!(o = pa_stream_drain(i->play_stream, stream_success_cb, i))) {
1729         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_drain(): %s\n", pa_strerror(pa_context_errno(i->context)));
1730         goto fail;
1731     }
1732
1733     i->operation_success = 0;
1734     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1735         PLAYBACK_STREAM_CHECK_DEAD_GOTO(i, fail);
1736
1737         pa_threaded_mainloop_wait(i->mainloop);
1738     }
1739
1740     if (!i->operation_success) {
1741         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_drain() 2: %s\n", pa_strerror(pa_context_errno(i->context)));
1742         goto fail;
1743     }
1744
1745     r = 0;
1746
1747 fail:
1748
1749     if (o)
1750         pa_operation_unref(o);
1751
1752     pa_threaded_mainloop_unlock(i->mainloop);
1753
1754     return 0;
1755 }
1756
1757 static int dsp_trigger(fd_info *i) {
1758     pa_operation *o = NULL;
1759     int r = -1;
1760
1761     if (!i->play_stream)
1762         return 0;
1763
1764     pa_threaded_mainloop_lock(i->mainloop);
1765
1766     if (dsp_empty_socket(i) < 0)
1767         goto fail;
1768
1769     debug(DEBUG_LEVEL_NORMAL, __FILE__": Triggering.\n");
1770
1771     if (!(o = pa_stream_trigger(i->play_stream, stream_success_cb, i))) {
1772         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_trigger(): %s\n", pa_strerror(pa_context_errno(i->context)));
1773         goto fail;
1774     }
1775
1776     i->operation_success = 0;
1777     while (!pa_operation_get_state(o) != PA_OPERATION_DONE) {
1778         PLAYBACK_STREAM_CHECK_DEAD_GOTO(i, fail);
1779
1780         pa_threaded_mainloop_wait(i->mainloop);
1781     }
1782
1783     if (!i->operation_success) {
1784         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_trigger(): %s\n", pa_strerror(pa_context_errno(i->context)));
1785         goto fail;
1786     }
1787
1788     r = 0;
1789
1790 fail:
1791
1792     if (o)
1793         pa_operation_unref(o);
1794
1795     pa_threaded_mainloop_unlock(i->mainloop);
1796
1797     return 0;
1798 }
1799
1800 static int dsp_ioctl(fd_info *i, unsigned long request, void*argp, int *_errno) {
1801     int ret = -1;
1802
1803     if (i->thread_fd == -1) {
1804         /*
1805          * We've encountered some fatal error and are just waiting
1806          * for a close.
1807          */
1808         debug(DEBUG_LEVEL_NORMAL, __FILE__": got ioctl 0x%08lx in fatal error state\n", request);
1809         *_errno = EIO;
1810         return -1;
1811     }
1812
1813     switch (request) {
1814         case SNDCTL_DSP_SETFMT: {
1815             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_SETFMT: %i\n", *(int*) argp);
1816
1817             pa_threaded_mainloop_lock(i->mainloop);
1818
1819             if (*(int*) argp == AFMT_QUERY)
1820                 *(int*) argp = map_format_back(i->sample_spec.format);
1821             else {
1822                 map_format((int*) argp, &i->sample_spec);
1823                 free_streams(i);
1824             }
1825
1826             pa_threaded_mainloop_unlock(i->mainloop);
1827             break;
1828         }
1829
1830         case SNDCTL_DSP_SPEED: {
1831             pa_sample_spec ss;
1832             int valid;
1833             char t[256];
1834
1835             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_SPEED: %i\n", *(int*) argp);
1836
1837             pa_threaded_mainloop_lock(i->mainloop);
1838
1839             ss = i->sample_spec;
1840             ss.rate = *(int*) argp;
1841
1842             if ((valid = pa_sample_spec_valid(&ss))) {
1843                 i->sample_spec = ss;
1844                 free_streams(i);
1845             }
1846
1847             debug(DEBUG_LEVEL_NORMAL, __FILE__": ss: %s\n", pa_sample_spec_snprint(t, sizeof(t), &i->sample_spec));
1848
1849             pa_threaded_mainloop_unlock(i->mainloop);
1850
1851             if (!valid) {
1852                 *_errno = EINVAL;
1853                 goto fail;
1854             }
1855
1856             break;
1857         }
1858
1859         case SNDCTL_DSP_STEREO:
1860             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_STEREO: %i\n", *(int*) argp);
1861
1862             pa_threaded_mainloop_lock(i->mainloop);
1863
1864             i->sample_spec.channels = *(int*) argp ? 2 : 1;
1865             free_streams(i);
1866
1867             pa_threaded_mainloop_unlock(i->mainloop);
1868             return 0;
1869
1870         case SNDCTL_DSP_CHANNELS: {
1871             pa_sample_spec ss;
1872             int valid;
1873
1874             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_CHANNELS: %i\n", *(int*) argp);
1875
1876             pa_threaded_mainloop_lock(i->mainloop);
1877
1878             ss = i->sample_spec;
1879             ss.channels = *(int*) argp;
1880
1881             if ((valid = pa_sample_spec_valid(&ss))) {
1882                 i->sample_spec = ss;
1883                 free_streams(i);
1884             }
1885
1886             pa_threaded_mainloop_unlock(i->mainloop);
1887
1888             if (!valid) {
1889                 *_errno = EINVAL;
1890                 goto fail;
1891             }
1892
1893             break;
1894         }
1895
1896         case SNDCTL_DSP_GETBLKSIZE:
1897             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETBLKSIZE\n");
1898
1899             pa_threaded_mainloop_lock(i->mainloop);
1900
1901             fix_metrics(i);
1902             *(int*) argp = i->fragment_size;
1903
1904             pa_threaded_mainloop_unlock(i->mainloop);
1905
1906             break;
1907
1908         case SNDCTL_DSP_SETFRAGMENT:
1909             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_SETFRAGMENT: 0x%08x\n", *(int*) argp);
1910
1911             pa_threaded_mainloop_lock(i->mainloop);
1912
1913             i->fragment_size = 1 << ((*(int*) argp) & 31);
1914             i->n_fragments = (*(int*) argp) >> 16;
1915
1916             /* 0x7FFF means that we can set whatever we like */
1917             if (i->n_fragments == 0x7FFF)
1918                 i->n_fragments = 12;
1919
1920             free_streams(i);
1921
1922             pa_threaded_mainloop_unlock(i->mainloop);
1923
1924             break;
1925
1926         case SNDCTL_DSP_GETCAPS:
1927             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_CAPS\n");
1928
1929             *(int*)  argp = DSP_CAP_DUPLEX
1930 #ifdef DSP_CAP_MULTI
1931               | DSP_CAP_MULTI
1932 #endif
1933               ;
1934             break;
1935
1936         case SNDCTL_DSP_GETODELAY: {
1937             int l;
1938
1939             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETODELAY\n");
1940
1941             pa_threaded_mainloop_lock(i->mainloop);
1942
1943             *(int*) argp = 0;
1944
1945             for (;;) {
1946                 pa_usec_t usec;
1947
1948                 PLAYBACK_STREAM_CHECK_DEAD_GOTO(i, exit_loop);
1949
1950                 if (pa_stream_get_latency(i->play_stream, &usec, NULL) >= 0) {
1951                     *(int*) argp = pa_usec_to_bytes(usec, &i->sample_spec);
1952                     break;
1953                 }
1954
1955                 if (pa_context_errno(i->context) != PA_ERR_NODATA) {
1956                     debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_get_latency(): %s\n", pa_strerror(pa_context_errno(i->context)));
1957                     break;
1958                 }
1959
1960                 pa_threaded_mainloop_wait(i->mainloop);
1961             }
1962
1963         exit_loop:
1964
1965 #ifdef SIOCINQ
1966             if (ioctl(i->thread_fd, SIOCINQ, &l) < 0)
1967                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ failed: %s\n", strerror(errno));
1968             else
1969                 *(int*) argp += l;
1970 #else
1971 # warning "Your platform does not support SIOCINQ, something might not work as intended."
1972 #endif
1973
1974             pa_threaded_mainloop_unlock(i->mainloop);
1975
1976             debug(DEBUG_LEVEL_NORMAL, __FILE__": ODELAY: %i\n", *(int*) argp);
1977
1978             break;
1979         }
1980
1981         case SNDCTL_DSP_RESET: {
1982             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_RESET\n");
1983
1984             pa_threaded_mainloop_lock(i->mainloop);
1985
1986             free_streams(i);
1987             dsp_flush_socket(i);
1988
1989             i->optr_n_blocks = 0;
1990
1991             pa_threaded_mainloop_unlock(i->mainloop);
1992             break;
1993         }
1994
1995         case SNDCTL_DSP_GETFMTS: {
1996             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETFMTS\n");
1997
1998             *(int*) argp = AFMT_MU_LAW|AFMT_A_LAW|AFMT_U8|AFMT_S16_LE|AFMT_S16_BE;
1999             break;
2000         }
2001
2002         case SNDCTL_DSP_POST:
2003             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_POST\n");
2004
2005             if (dsp_trigger(i) < 0)
2006                 *_errno = EIO;
2007             break;
2008
2009         case SNDCTL_DSP_SYNC:
2010             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_SYNC\n");
2011
2012             if (dsp_drain(i) < 0)
2013                 *_errno = EIO;
2014
2015             break;
2016
2017         case SNDCTL_DSP_GETOSPACE:
2018         case SNDCTL_DSP_GETISPACE: {
2019             audio_buf_info *bi = (audio_buf_info*) argp;
2020             int l = 0;
2021             size_t k = 0;
2022
2023             if (request == SNDCTL_DSP_GETOSPACE)
2024                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETOSPACE\n");
2025             else
2026                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETISPACE\n");
2027
2028             pa_threaded_mainloop_lock(i->mainloop);
2029
2030             fix_metrics(i);
2031
2032             if (request == SNDCTL_DSP_GETOSPACE) {
2033                 if (i->play_stream) {
2034                     if ((k = pa_stream_writable_size(i->play_stream)) == (size_t) -1)
2035                         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_writable_size(): %s\n", pa_strerror(pa_context_errno(i->context)));
2036                 } else
2037                     k = i->fragment_size * i->n_fragments;
2038
2039 #ifdef SIOCINQ
2040                 if (ioctl(i->thread_fd, SIOCINQ, &l) < 0) {
2041                     debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ failed: %s\n", strerror(errno));
2042                     l = 0;
2043                 }
2044 #else
2045 # warning "Your platform does not dsp_flush_fd, something might not work as intended."
2046 #endif
2047
2048                 bi->bytes = k > (size_t) l ? k - l : 0;
2049             } else {
2050                 if (i->rec_stream) {
2051                     if ((k = pa_stream_readable_size(i->rec_stream)) == (size_t) -1)
2052                         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_readable_size(): %s\n", pa_strerror(pa_context_errno(i->context)));
2053                 } else
2054                     k = 0;
2055
2056 #ifdef SIOCINQ
2057                 if (ioctl(i->app_fd, SIOCINQ, &l) < 0) {
2058                     debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ failed: %s\n", strerror(errno));
2059                     l = 0;
2060                 }
2061 #else
2062 # warning "Your platform does not dsp_flush_fd, something might not work as intended."
2063 #endif
2064                 bi->bytes = k + l;
2065             }
2066
2067             bi->fragsize = i->fragment_size;
2068             bi->fragstotal = i->n_fragments;
2069             bi->fragments = bi->bytes / bi->fragsize;
2070
2071             pa_threaded_mainloop_unlock(i->mainloop);
2072
2073             debug(DEBUG_LEVEL_NORMAL, __FILE__": fragsize=%i, fragstotal=%i, bytes=%i, fragments=%i\n", bi->fragsize, bi->fragstotal, bi->bytes, bi->fragments);
2074
2075             break;
2076         }
2077
2078         case SOUND_PCM_READ_RATE:
2079             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_PCM_READ_RATE\n");
2080
2081             pa_threaded_mainloop_lock(i->mainloop);
2082             *(int*) argp = i->sample_spec.rate;
2083             pa_threaded_mainloop_unlock(i->mainloop);
2084             break;
2085
2086         case SOUND_PCM_READ_CHANNELS:
2087             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_PCM_READ_CHANNELS\n");
2088
2089             pa_threaded_mainloop_lock(i->mainloop);
2090             *(int*) argp = i->sample_spec.channels;
2091             pa_threaded_mainloop_unlock(i->mainloop);
2092             break;
2093
2094         case SOUND_PCM_READ_BITS:
2095             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_PCM_READ_BITS\n");
2096
2097             pa_threaded_mainloop_lock(i->mainloop);
2098             *(int*) argp = pa_sample_size(&i->sample_spec)*8;
2099             pa_threaded_mainloop_unlock(i->mainloop);
2100             break;
2101
2102         case SNDCTL_DSP_GETOPTR: {
2103             count_info *info;
2104
2105             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETOPTR\n");
2106
2107             info = (count_info*) argp;
2108             memset(info, 0, sizeof(*info));
2109
2110             pa_threaded_mainloop_lock(i->mainloop);
2111
2112             for (;;) {
2113                 pa_usec_t usec;
2114
2115                 PLAYBACK_STREAM_CHECK_DEAD_GOTO(i, exit_loop);
2116
2117                 if (pa_stream_get_time(i->play_stream, &usec) >= 0) {
2118                     size_t k = pa_usec_to_bytes(usec, &i->sample_spec);
2119                     int m;
2120
2121                     info->bytes = (int) k;
2122                     m = k / i->fragment_size;
2123                     info->blocks = m - i->optr_n_blocks;
2124                     i->optr_n_blocks = m;
2125
2126                     break;
2127                 }
2128
2129                 if (pa_context_errno(i->context) != PA_ERR_NODATA) {
2130                     debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_get_latency(): %s\n", pa_strerror(pa_context_errno(i->context)));
2131                     break;
2132                 }
2133
2134                 pa_threaded_mainloop_wait(i->mainloop);
2135             }
2136
2137             pa_threaded_mainloop_unlock(i->mainloop);
2138
2139             debug(DEBUG_LEVEL_NORMAL, __FILE__": GETOPTR bytes=%i, blocks=%i, ptr=%i\n", info->bytes, info->blocks, info->ptr);
2140
2141             break;
2142         }
2143
2144         case SNDCTL_DSP_GETIPTR:
2145             debug(DEBUG_LEVEL_NORMAL, __FILE__": invalid ioctl SNDCTL_DSP_GETIPTR\n");
2146             goto inval;
2147
2148         default:
2149             debug(DEBUG_LEVEL_NORMAL, __FILE__": unknown ioctl 0x%08lx\n", request);
2150
2151 inval:
2152             *_errno = EINVAL;
2153             goto fail;
2154     }
2155
2156     ret = 0;
2157
2158 fail:
2159
2160     return ret;
2161 }
2162
2163 int ioctl(int fd, unsigned long request, ...) {
2164     fd_info *i;
2165     va_list args;
2166     void *argp;
2167     int r, _errno = 0;
2168
2169     debug(DEBUG_LEVEL_VERBOSE, __FILE__": ioctl()\n");
2170
2171     va_start(args, request);
2172     argp = va_arg(args, void *);
2173     va_end(args);
2174
2175     if (!function_enter()) {
2176         LOAD_IOCTL_FUNC();
2177         return _ioctl(fd, request, argp);
2178     }
2179
2180     if (!(i = fd_info_find(fd))) {
2181         function_exit();
2182         LOAD_IOCTL_FUNC();
2183         return _ioctl(fd, request, argp);
2184     }
2185
2186     if (i->type == FD_INFO_MIXER)
2187         r = mixer_ioctl(i, request, argp, &_errno);
2188     else
2189         r = dsp_ioctl(i, request, argp, &_errno);
2190
2191     fd_info_unref(i);
2192
2193     if (_errno)
2194         errno = _errno;
2195
2196     function_exit();
2197
2198     return r;
2199 }
2200
2201 int close(int fd) {
2202     fd_info *i;
2203
2204     debug(DEBUG_LEVEL_VERBOSE, __FILE__": close()\n");
2205
2206     if (!function_enter()) {
2207         LOAD_CLOSE_FUNC();
2208         return _close(fd);
2209     }
2210
2211     if (!(i = fd_info_find(fd))) {
2212         function_exit();
2213         LOAD_CLOSE_FUNC();
2214         return _close(fd);
2215     }
2216
2217     fd_info_remove_from_list(i);
2218     fd_info_unref(i);
2219
2220     function_exit();
2221
2222     return 0;
2223 }
2224
2225 int access(const char *pathname, int mode) {
2226
2227     if (!pathname) {
2228         /* Firefox needs this. See #27 */
2229         errno = EFAULT;
2230         return -1;
2231     }
2232
2233     debug(DEBUG_LEVEL_VERBOSE, __FILE__": access(%s)\n", pathname);
2234
2235     if (strcmp(pathname, "/dev/dsp") != 0 &&
2236         strcmp(pathname, "/dev/adsp") != 0 &&
2237         strcmp(pathname, "/dev/sndstat") != 0 &&
2238         strcmp(pathname, "/dev/mixer") != 0) {
2239         LOAD_ACCESS_FUNC();
2240         return _access(pathname, mode);
2241     }
2242
2243     if (mode & (W_OK | X_OK)) {
2244         debug(DEBUG_LEVEL_NORMAL, __FILE__": access(%s, %x) = EACCESS\n", pathname, mode);
2245         errno = EACCES;
2246         return -1;
2247     }
2248
2249     debug(DEBUG_LEVEL_NORMAL, __FILE__": access(%s, %x) = OK\n", pathname, mode);
2250
2251     return 0;
2252 }
2253
2254 #ifdef HAVE_OPEN64
2255
2256 int open64(const char *filename, int flags, ...) {
2257     va_list args;
2258     mode_t mode = 0;
2259
2260     debug(DEBUG_LEVEL_VERBOSE, __FILE__": open64(%s)\n", filename);
2261
2262     va_start(args, flags);
2263     if (flags & O_CREAT)
2264         mode = va_arg(args, mode_t);
2265     va_end(args);
2266
2267     if (strcmp(filename, "/dev/dsp") != 0 &&
2268         strcmp(filename, "/dev/adsp") != 0 &&
2269         strcmp(filename, "/dev/sndstat") != 0 &&
2270         strcmp(filename, "/dev/mixer") != 0) {
2271         LOAD_OPEN64_FUNC();
2272         return _open64(filename, flags, mode);
2273     }
2274
2275     return open(filename, flags, mode);
2276 }
2277
2278 #endif
2279
2280 FILE* fopen(const char *filename, const char *mode) {
2281     FILE *f = NULL;
2282     int fd;
2283     mode_t m;
2284
2285     debug(DEBUG_LEVEL_VERBOSE, __FILE__": fopen(%s)\n", filename);
2286
2287     if (strcmp(filename, "/dev/dsp") != 0 &&
2288         strcmp(filename, "/dev/adsp") != 0 &&
2289         strcmp(filename, "/dev/sndstat") != 0 &&
2290         strcmp(filename, "/dev/mixer") != 0) {
2291         LOAD_FOPEN_FUNC();
2292         return _fopen(filename, mode);
2293     }
2294
2295     switch (mode[0]) {
2296     case 'r':
2297         m = O_RDONLY;
2298         break;
2299     case 'w':
2300     case 'a':
2301         m = O_WRONLY;
2302         break;
2303     default:
2304         errno = EINVAL;
2305         return NULL;
2306     }
2307
2308     if ((((mode[1] == 'b') || (mode[1] == 't')) && (mode[2] == '+')) || (mode[1] == '+'))
2309         m = O_RDWR;
2310
2311     if ((fd = open(filename, m)) < 0)
2312         return NULL;
2313
2314     if (!(f = fdopen(fd, mode))) {
2315         close(fd);
2316         return NULL;
2317     }
2318
2319     return f;
2320 }
2321
2322 #ifdef HAVE_OPEN64
2323
2324 FILE *fopen64(const char *filename, const char *mode) {
2325
2326     debug(DEBUG_LEVEL_VERBOSE, __FILE__": fopen64(%s)\n", filename);
2327
2328     if (strcmp(filename, "/dev/dsp") != 0 &&
2329         strcmp(filename, "/dev/adsp") != 0 &&
2330         strcmp(filename, "/dev/sndstat") != 0 &&
2331         strcmp(filename, "/dev/mixer") != 0) {
2332         LOAD_FOPEN64_FUNC();
2333         return _fopen64(filename, mode);
2334     }
2335
2336     return fopen(filename, mode);
2337 }
2338
2339 #endif
2340
2341 int fclose(FILE *f) {
2342     fd_info *i;
2343
2344     debug(DEBUG_LEVEL_VERBOSE, __FILE__": fclose()\n");
2345
2346     if (!function_enter()) {
2347         LOAD_FCLOSE_FUNC();
2348         return _fclose(f);
2349     }
2350
2351     if (!(i = fd_info_find(fileno(f)))) {
2352         function_exit();
2353         LOAD_FCLOSE_FUNC();
2354         return _fclose(f);
2355     }
2356
2357     fd_info_remove_from_list(i);
2358
2359     /* Dirty trick to avoid that the fd is not freed twice, once by us
2360      * and once by the real fclose() */
2361     i->app_fd = -1;
2362
2363     fd_info_unref(i);
2364
2365     function_exit();
2366
2367     LOAD_FCLOSE_FUNC();
2368     return _fclose(f);
2369 }