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", (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", (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", (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             debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_connect_playback() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 913             fd_info_shutdown(i);
 914             break;
 915
 916         case PA_STREAM_TERMINATED:
 917         case PA_STREAM_UNCONNECTED:
 918         case PA_STREAM_CREATING:
 919             break;
 920     }
 921 }
 922
 923 static int create_playback_stream(fd_info *i) {
 924     pa_buffer_attr attr;
 925     int n;
 926
 927     assert(i);
 928
 929     fix_metrics(i);
 930
 931     if (!(i->play_stream = pa_stream_new(i->context, stream_name(), &i->sample_spec, NULL))) {
 932         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_new() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 933         goto fail;
 934     }
 935
 936     pa_stream_set_state_callback(i->play_stream, stream_state_cb, i);
 937     pa_stream_set_write_callback(i->play_stream, stream_request_cb, i);
 938     pa_stream_set_latency_update_callback(i->play_stream, stream_latency_update_cb, i);
 939
 940     memset(&attr, 0, sizeof(attr));
 941     attr.maxlength = i->fragment_size * (i->n_fragments+1);
 942     attr.tlength = i->fragment_size * i->n_fragments;
 943     attr.prebuf = i->fragment_size;
 944     attr.minreq = i->fragment_size;
 945
 946     if (pa_stream_connect_playback(i->play_stream, NULL, &attr, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL) < 0) {
 947         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_connect_playback() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 948         goto fail;
 949     }
 950
 951     n = i->fragment_size;
 952     setsockopt(i->app_fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n));
 953     n = i->fragment_size;
 954     setsockopt(i->thread_fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n));
 955
 956     return 0;
 957
 958 fail:
 959     return -1;
 960 }
 961
 962 static int create_record_stream(fd_info *i) {
 963     pa_buffer_attr attr;
 964     int n;
 965
 966     assert(i);
 967
 968     fix_metrics(i);
 969
 970     if (!(i->rec_stream = pa_stream_new(i->context, stream_name(), &i->sample_spec, NULL))) {
 971         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_new() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 972         goto fail;
 973     }
 974
 975     pa_stream_set_state_callback(i->rec_stream, stream_state_cb, i);
 976     pa_stream_set_read_callback(i->rec_stream, stream_request_cb, i);
 977     pa_stream_set_latency_update_callback(i->rec_stream, stream_latency_update_cb, i);
 978
 979     memset(&attr, 0, sizeof(attr));
 980     attr.maxlength = i->fragment_size * (i->n_fragments+1);
 981     attr.fragsize = i->fragment_size;
 982
 983     if (pa_stream_connect_record(i->rec_stream, NULL, &attr, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE) < 0) {
 984         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_connect_playback() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 985         goto fail;
 986     }
 987
 988     n = i->fragment_size;
 989     setsockopt(i->app_fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n));
 990     n = i->fragment_size;
 991     setsockopt(i->thread_fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n));
 992
 993     return 0;
 994
 995 fail:
 996     return -1;
 997 }
 998
 999 static void free_streams(fd_info *i) {
1000     assert(i);
1001
1002     if (i->play_stream) {
1003         pa_stream_disconnect(i->play_stream);
1004         pa_stream_unref(i->play_stream);
1005         i->play_stream = NULL;
1006     }
1007
1008     if (i->rec_stream) {
1009         pa_stream_disconnect(i->rec_stream);
1010         pa_stream_unref(i->rec_stream);
1011         i->rec_stream = NULL;
1012     }
1013 }
1014
1015 static void io_event_cb(pa_mainloop_api *api, pa_io_event *e, int fd, pa_io_event_flags_t flags, void *userdata) {
1016     fd_info *i = userdata;
1017
1018     pa_threaded_mainloop_signal(i->mainloop, 0);
1019
1020     if (flags & PA_IO_EVENT_INPUT) {
1021
1022         if (!i->play_stream) {
1023             if (create_playback_stream(i) < 0)
1024                 goto fail;
1025         } else {
1026             if (fd_info_copy_data(i, 0) < 0)
1027                 goto fail;
1028         }
1029
1030     } else if (flags & PA_IO_EVENT_OUTPUT) {
1031
1032         if (!i->rec_stream) {
1033             if (create_record_stream(i) < 0)
1034                 goto fail;
1035         } else {
1036             if (fd_info_copy_data(i, 0) < 0)
1037                 goto fail;
1038         }
1039
1040     } else if (flags & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR))
1041         goto fail;
1042
1043     return;
1044
1045 fail:
1046     /* We can't do anything better than removing the event source */
1047     fd_info_shutdown(i);
1048 }
1049
1050 static int dsp_open(int flags, int *_errno) {
1051     fd_info *i;
1052     pa_mainloop_api *api;
1053     int ret;
1054     int f;
1055
1056     debug(DEBUG_LEVEL_NORMAL, __FILE__": dsp_open()\n");
1057
1058     if (!(i = fd_info_new(FD_INFO_STREAM, _errno)))
1059         return -1;
1060
1061     if ((flags & O_NONBLOCK) == O_NONBLOCK) {
1062         if ((f = fcntl(i->app_fd, F_GETFL)) >= 0)
1063             fcntl(i->app_fd, F_SETFL, f|O_NONBLOCK);
1064     }
1065     if ((f = fcntl(i->thread_fd, F_GETFL)) >= 0)
1066         fcntl(i->thread_fd, F_SETFL, f|O_NONBLOCK);
1067
1068     fcntl(i->app_fd, F_SETFD, FD_CLOEXEC);
1069     fcntl(i->thread_fd, F_SETFD, FD_CLOEXEC);
1070
1071     pa_threaded_mainloop_lock(i->mainloop);
1072     api = pa_threaded_mainloop_get_api(i->mainloop);
1073
1074     switch (flags & O_ACCMODE) {
1075     case O_RDONLY:
1076         i->io_flags = PA_IO_EVENT_OUTPUT;
1077         shutdown(i->thread_fd, SHUT_RD);
1078         shutdown(i->app_fd, SHUT_WR);
1079         break;
1080     case O_WRONLY:
1081         i->io_flags = PA_IO_EVENT_INPUT;
1082         shutdown(i->thread_fd, SHUT_WR);
1083         shutdown(i->app_fd, SHUT_RD);
1084         break;
1085     case O_RDWR:
1086         i->io_flags = PA_IO_EVENT_INPUT | PA_IO_EVENT_OUTPUT;
1087         break;
1088     default:
1089         return -1;
1090     }
1091
1092     if (!(i->io_event = api->io_new(api, i->thread_fd, i->io_flags, io_event_cb, i)))
1093         goto fail;
1094
1095     pa_threaded_mainloop_unlock(i->mainloop);
1096
1097     debug(DEBUG_LEVEL_NORMAL, __FILE__": dsp_open() succeeded, fd=%i\n", i->app_fd);
1098
1099     fd_info_add_to_list(i);
1100     ret = i->app_fd;
1101     fd_info_unref(i);
1102
1103     return ret;
1104
1105 fail:
1106     pa_threaded_mainloop_unlock(i->mainloop);
1107
1108     if (i)
1109         fd_info_unref(i);
1110
1111     *_errno = EIO;
1112
1113     debug(DEBUG_LEVEL_NORMAL, __FILE__": dsp_open() failed\n");
1114
1115     return -1;
1116 }
1117
1118 static void sink_info_cb(pa_context *context, const pa_sink_info *si, int eol, void *userdata) {
1119     fd_info *i = userdata;
1120
1121     if (!si && eol < 0) {
1122         i->operation_success = 0;
1123         pa_threaded_mainloop_signal(i->mainloop, 0);
1124         return;
1125     }
1126
1127     if (eol)
1128         return;
1129
1130     if (!pa_cvolume_equal(&i->sink_volume, &si->volume))
1131         i->volume_modify_count++;
1132
1133     i->sink_volume = si->volume;
1134     i->sink_index = si->index;
1135
1136     i->operation_success = 1;
1137     pa_threaded_mainloop_signal(i->mainloop, 0);
1138 }
1139
1140 static void source_info_cb(pa_context *context, const pa_source_info *si, int eol, void *userdata) {
1141     fd_info *i = userdata;
1142
1143     if (!si && eol < 0) {
1144         i->operation_success = 0;
1145         pa_threaded_mainloop_signal(i->mainloop, 0);
1146         return;
1147     }
1148
1149     if (eol)
1150         return;
1151
1152     if (!pa_cvolume_equal(&i->source_volume, &si->volume))
1153         i->volume_modify_count++;
1154
1155     i->source_volume = si->volume;
1156     i->source_index = si->index;
1157
1158     i->operation_success = 1;
1159     pa_threaded_mainloop_signal(i->mainloop, 0);
1160 }
1161
1162 static void subscribe_cb(pa_context *context, pa_subscription_event_type_t t, uint32_t idx, void *userdata) {
1163     fd_info *i = userdata;
1164     pa_operation *o = NULL;
1165
1166     if (i->sink_index != idx)
1167         return;
1168
1169     if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) != PA_SUBSCRIPTION_EVENT_CHANGE)
1170         return;
1171
1172     if (!(o = pa_context_get_sink_info_by_index(i->context, i->sink_index, sink_info_cb, i))) {
1173         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get sink info: %s", pa_strerror(pa_context_errno(i->context)));
1174         return;
1175     }
1176
1177     pa_operation_unref(o);
1178 }
1179
1180 static int mixer_open(int flags, int *_errno) {
1181     fd_info *i;
1182     pa_operation *o = NULL;
1183     int ret;
1184
1185     debug(DEBUG_LEVEL_NORMAL, __FILE__": mixer_open()\n");
1186
1187     if (!(i = fd_info_new(FD_INFO_MIXER, _errno)))
1188         return -1;
1189
1190     pa_threaded_mainloop_lock(i->mainloop);
1191
1192     pa_context_set_subscribe_callback(i->context, subscribe_cb, i);
1193
1194     if (!(o = pa_context_subscribe(i->context, PA_SUBSCRIPTION_MASK_SINK | PA_SUBSCRIPTION_MASK_SOURCE, context_success_cb, i))) {
1195         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to subscribe to events: %s", pa_strerror(pa_context_errno(i->context)));
1196         *_errno = EIO;
1197         goto fail;
1198     }
1199
1200     i->operation_success = 0;
1201     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1202         pa_threaded_mainloop_wait(i->mainloop);
1203         CONTEXT_CHECK_DEAD_GOTO(i, fail);
1204     }
1205
1206     pa_operation_unref(o);
1207     o = NULL;
1208
1209     if (!i->operation_success) {
1210         debug(DEBUG_LEVEL_NORMAL, __FILE__":Failed to subscribe to events: %s", pa_strerror(pa_context_errno(i->context)));
1211         *_errno = EIO;
1212         goto fail;
1213     }
1214
1215     /* Get sink info */
1216
1217     if (!(o = pa_context_get_sink_info_by_name(i->context, NULL, sink_info_cb, i))) {
1218         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get sink info: %s", pa_strerror(pa_context_errno(i->context)));
1219         *_errno = EIO;
1220         goto fail;
1221     }
1222
1223     i->operation_success = 0;
1224     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1225         pa_threaded_mainloop_wait(i->mainloop);
1226         CONTEXT_CHECK_DEAD_GOTO(i, fail);
1227     }
1228
1229     pa_operation_unref(o);
1230     o = NULL;
1231
1232     if (!i->operation_success) {
1233         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get sink info: %s", pa_strerror(pa_context_errno(i->context)));
1234         *_errno = EIO;
1235         goto fail;
1236     }
1237
1238     /* Get source info */
1239
1240     if (!(o = pa_context_get_source_info_by_name(i->context, NULL, source_info_cb, i))) {
1241         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get source info: %s", pa_strerror(pa_context_errno(i->context)));
1242         *_errno = EIO;
1243         goto fail;
1244     }
1245
1246     i->operation_success = 0;
1247     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1248         pa_threaded_mainloop_wait(i->mainloop);
1249         CONTEXT_CHECK_DEAD_GOTO(i, fail);
1250     }
1251
1252     pa_operation_unref(o);
1253     o = NULL;
1254
1255     if (!i->operation_success) {
1256         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get source info: %s", pa_strerror(pa_context_errno(i->context)));
1257         *_errno = EIO;
1258         goto fail;
1259     }
1260
1261     pa_threaded_mainloop_unlock(i->mainloop);
1262
1263     debug(DEBUG_LEVEL_NORMAL, __FILE__": mixer_open() succeeded, fd=%i\n", i->app_fd);
1264
1265     fd_info_add_to_list(i);
1266     ret = i->app_fd;
1267     fd_info_unref(i);
1268
1269     return ret;
1270
1271 fail:
1272     if (o)
1273         pa_operation_unref(o);
1274
1275     pa_threaded_mainloop_unlock(i->mainloop);
1276
1277     if (i)
1278         fd_info_unref(i);
1279
1280     *_errno = EIO;
1281
1282     debug(DEBUG_LEVEL_NORMAL, __FILE__": mixer_open() failed\n");
1283
1284     return -1;
1285 }
1286
1287 static int sndstat_open(int flags, int *_errno) {
1288     static const char sndstat[] =
1289         "Sound Driver:3.8.1a-980706 (PulseAudio Virtual OSS)\n"
1290         "Kernel: POSIX\n"
1291         "Config options: 0\n"
1292         "\n"
1293         "Installed drivers:\n"
1294         "Type 255: PulseAudio Virtual OSS\n"
1295         "\n"
1296         "Card config:\n"
1297         "PulseAudio Virtual OSS\n"
1298         "\n"
1299         "Audio devices:\n"
1300         "0: PulseAudio Virtual OSS\n"
1301         "\n"
1302         "Synth devices: NOT ENABLED IN CONFIG\n"
1303         "\n"
1304         "Midi devices:\n"
1305         "\n"
1306         "Timers:\n"
1307         "\n"
1308         "Mixers:\n"
1309         "0: PulseAudio Virtual OSS\n";
1310
1311     char fn[] = "/tmp/padsp-sndstat-XXXXXX";
1312     mode_t u;
1313     int fd = -1;
1314     int e;
1315
1316     debug(DEBUG_LEVEL_NORMAL, __FILE__": sndstat_open()\n");
1317
1318     if (flags != O_RDONLY
1319 #ifdef O_LARGEFILE
1320         && flags != (O_RDONLY|O_LARGEFILE)
1321 #endif
1322        ) {
1323         *_errno = EACCES;
1324         debug(DEBUG_LEVEL_NORMAL, __FILE__": bad access!\n");
1325         goto fail;
1326     }
1327
1328     u = umask(0077);
1329     fd = mkstemp(fn);
1330     e = errno;
1331     umask(u);
1332
1333     if (fd < 0) {
1334         *_errno = e;
1335         debug(DEBUG_LEVEL_NORMAL, __FILE__": mkstemp() failed: %s\n", strerror(errno));
1336         goto fail;
1337     }
1338
1339     unlink(fn);
1340
1341     if (write(fd, sndstat, sizeof(sndstat) -1) != sizeof(sndstat)-1) {
1342         *_errno = errno;
1343         debug(DEBUG_LEVEL_NORMAL, __FILE__": write() failed: %s\n", strerror(errno));
1344         goto fail;
1345     }
1346
1347     if (lseek(fd, SEEK_SET, 0) < 0) {
1348         *_errno = errno;
1349         debug(DEBUG_LEVEL_NORMAL, __FILE__": lseek() failed: %s\n", strerror(errno));
1350         goto fail;
1351     }
1352
1353     return fd;
1354
1355 fail:
1356     if (fd >= 0)
1357         close(fd);
1358     return -1;
1359 }
1360
1361 int open(const char *filename, int flags, ...) {
1362     va_list args;
1363     mode_t mode = 0;
1364     int r, _errno = 0;
1365
1366     debug(DEBUG_LEVEL_VERBOSE, __FILE__": open(%s)\n", filename);
1367
1368     va_start(args, flags);
1369     if (flags & O_CREAT) {
1370       if (sizeof(mode_t) < sizeof(int))
1371         mode = va_arg(args, int);
1372       else
1373         mode = va_arg(args, mode_t);
1374     }
1375     va_end(args);
1376
1377     if (!function_enter()) {
1378         LOAD_OPEN_FUNC();
1379         return _open(filename, flags, mode);
1380     }
1381
1382     if (dsp_cloak_enable() && (strcmp(filename, "/dev/dsp") == 0 || strcmp(filename, "/dev/adsp") == 0)) {
1383         r = dsp_open(flags, &_errno);
1384     } else if (mixer_cloak_enable() && strcmp(filename, "/dev/mixer") == 0) {
1385         r = mixer_open(flags, &_errno);
1386     } else if (sndstat_cloak_enable() && strcmp(filename, "/dev/sndstat") == 0) {
1387         r = sndstat_open(flags, &_errno);
1388     } else {
1389         function_exit();
1390         LOAD_OPEN_FUNC();
1391         return _open(filename, flags, mode);
1392     }
1393
1394     function_exit();
1395
1396     if (_errno)
1397         errno = _errno;
1398
1399     return r;
1400 }
1401
1402 static int mixer_ioctl(fd_info *i, unsigned long request, void*argp, int *_errno) {
1403     int ret = -1;
1404
1405     switch (request) {
1406         case SOUND_MIXER_READ_DEVMASK :
1407             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_DEVMASK\n");
1408
1409             *(int*) argp = SOUND_MASK_PCM | SOUND_MASK_IGAIN;
1410             break;
1411
1412         case SOUND_MIXER_READ_RECMASK :
1413             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_RECMASK\n");
1414
1415             *(int*) argp = SOUND_MASK_IGAIN;
1416             break;
1417
1418         case SOUND_MIXER_READ_STEREODEVS:
1419             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_STEREODEVS\n");
1420
1421             pa_threaded_mainloop_lock(i->mainloop);
1422             *(int*) argp = 0;
1423             if (i->sink_volume.channels > 1)
1424                 *(int*) argp |= SOUND_MASK_PCM;
1425             if (i->source_volume.channels > 1)
1426                 *(int*) argp |= SOUND_MASK_IGAIN;
1427             pa_threaded_mainloop_unlock(i->mainloop);
1428
1429             break;
1430
1431         case SOUND_MIXER_READ_RECSRC:
1432             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_RECSRC\n");
1433
1434             *(int*) argp = SOUND_MASK_IGAIN;
1435             break;
1436
1437         case SOUND_MIXER_WRITE_RECSRC:
1438             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_WRITE_RECSRC\n");
1439             break;
1440
1441         case SOUND_MIXER_READ_CAPS:
1442             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_CAPS\n");
1443
1444             *(int*) argp = 0;
1445             break;
1446
1447         case SOUND_MIXER_READ_PCM:
1448         case SOUND_MIXER_READ_IGAIN: {
1449             pa_cvolume *v;
1450
1451             if (request == SOUND_MIXER_READ_PCM)
1452                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_PCM\n");
1453             else
1454                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_IGAIN\n");
1455
1456             pa_threaded_mainloop_lock(i->mainloop);
1457
1458             if (request == SOUND_MIXER_READ_PCM)
1459                 v = &i->sink_volume;
1460             else
1461                 v = &i->source_volume;
1462
1463             *(int*) argp =
1464                 ((v->values[0]*100/PA_VOLUME_NORM)) |
1465                 ((v->values[v->channels > 1 ? 1 : 0]*100/PA_VOLUME_NORM)  << 8);
1466
1467             pa_threaded_mainloop_unlock(i->mainloop);
1468
1469             break;
1470         }
1471
1472         case SOUND_MIXER_WRITE_PCM:
1473         case SOUND_MIXER_WRITE_IGAIN: {
1474             pa_cvolume v, *pv;
1475
1476             if (request == SOUND_MIXER_READ_PCM)
1477                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_WRITE_PCM\n");
1478             else
1479                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_WRITE_IGAIN\n");
1480
1481             pa_threaded_mainloop_lock(i->mainloop);
1482
1483             if (request == SOUND_MIXER_READ_PCM) {
1484                 v = i->sink_volume;
1485                 pv = &i->sink_volume;
1486             } else {
1487                 v = i->source_volume;
1488                 pv = &i->source_volume;
1489             }
1490
1491             pv->values[0] = ((*(int*) argp & 0xFF)*PA_VOLUME_NORM)/100;
1492             pv->values[1] = ((*(int*) argp >> 8)*PA_VOLUME_NORM)/100;
1493
1494             if (!pa_cvolume_equal(pv, &v)) {
1495                 pa_operation *o;
1496
1497                 if (request == SOUND_MIXER_READ_PCM)
1498                     o = pa_context_set_sink_volume_by_index(i->context, i->sink_index, pv, context_success_cb, i);
1499                 else
1500                     o = pa_context_set_source_volume_by_index(i->context, i->source_index, pv, context_success_cb, i);
1501
1502                 if (!o)
1503                     debug(DEBUG_LEVEL_NORMAL, __FILE__":Failed set volume: %s", pa_strerror(pa_context_errno(i->context)));
1504                 else {
1505
1506                     i->operation_success = 0;
1507                     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1508                         CONTEXT_CHECK_DEAD_GOTO(i, exit_loop);
1509
1510                         pa_threaded_mainloop_wait(i->mainloop);
1511                     }
1512                 exit_loop:
1513
1514                     if (!i->operation_success)
1515                         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to set volume: %s\n", pa_strerror(pa_context_errno(i->context)));
1516
1517                     pa_operation_unref(o);
1518                 }
1519
1520                 /* We don't wait for completion here */
1521                 i->volume_modify_count++;
1522             }
1523
1524             pa_threaded_mainloop_unlock(i->mainloop);
1525
1526             break;
1527         }
1528
1529         case SOUND_MIXER_INFO: {
1530             mixer_info *mi = argp;
1531
1532             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_INFO\n");
1533
1534             memset(mi, 0, sizeof(mixer_info));
1535             strncpy(mi->id, "PULSEAUDIO", sizeof(mi->id));
1536             strncpy(mi->name, "PulseAudio Virtual OSS", sizeof(mi->name));
1537             pa_threaded_mainloop_lock(i->mainloop);
1538             mi->modify_counter = i->volume_modify_count;
1539             pa_threaded_mainloop_unlock(i->mainloop);
1540             break;
1541         }
1542
1543         default:
1544             debug(DEBUG_LEVEL_NORMAL, __FILE__": unknown ioctl 0x%08lx\n", request);
1545
1546             *_errno = EINVAL;
1547             goto fail;
1548     }
1549
1550     ret = 0;
1551
1552 fail:
1553
1554     return ret;
1555 }
1556
1557 static int map_format(int *fmt, pa_sample_spec *ss) {
1558
1559     switch (*fmt) {
1560         case AFMT_MU_LAW:
1561             ss->format = PA_SAMPLE_ULAW;
1562             break;
1563
1564         case AFMT_A_LAW:
1565             ss->format = PA_SAMPLE_ALAW;
1566             break;
1567
1568         case AFMT_S8:
1569             *fmt = AFMT_U8;
1570             /* fall through */
1571         case AFMT_U8:
1572             ss->format = PA_SAMPLE_U8;
1573             break;
1574
1575         case AFMT_U16_BE:
1576             *fmt = AFMT_S16_BE;
1577             /* fall through */
1578         case AFMT_S16_BE:
1579             ss->format = PA_SAMPLE_S16BE;
1580             break;
1581
1582         case AFMT_U16_LE:
1583             *fmt = AFMT_S16_LE;
1584             /* fall through */
1585         case AFMT_S16_LE:
1586             ss->format = PA_SAMPLE_S16LE;
1587             break;
1588
1589         default:
1590             ss->format = PA_SAMPLE_S16NE;
1591             *fmt = AFMT_S16_NE;
1592             break;
1593     }
1594
1595     return 0;
1596 }
1597
1598 static int map_format_back(pa_sample_format_t format) {
1599     switch (format) {
1600         case PA_SAMPLE_S16LE: return AFMT_S16_LE;
1601         case PA_SAMPLE_S16BE: return AFMT_S16_BE;
1602         case PA_SAMPLE_ULAW: return AFMT_MU_LAW;
1603         case PA_SAMPLE_ALAW: return AFMT_A_LAW;
1604         case PA_SAMPLE_U8: return AFMT_U8;
1605         default:
1606             abort();
1607     }
1608 }
1609
1610 static int dsp_flush_fd(int fd) {
1611 #ifdef SIOCINQ
1612     int l;
1613
1614     if (ioctl(fd, SIOCINQ, &l) < 0) {
1615         debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ: %s\n", strerror(errno));
1616         return -1;
1617     }
1618
1619     while (l > 0) {
1620         char buf[1024];
1621         size_t k;
1622
1623         k = (size_t) l > sizeof(buf) ? sizeof(buf) : (size_t) l;
1624         if (read(fd, buf, k) < 0)
1625             debug(DEBUG_LEVEL_NORMAL, __FILE__": read(): %s\n", strerror(errno));
1626         l -= k;
1627     }
1628
1629     return 0;
1630 #else
1631 # warning "Your platform does not support SIOCINQ, something might not work as intended."
1632     return 0;
1633 #endif
1634 }
1635
1636 static int dsp_flush_socket(fd_info *i) {
1637     int res = 0;
1638
1639     if ((i->thread_fd < 0) && (i->app_fd < 0))
1640         return -1;
1641
1642     if (i->thread_fd >= 0)
1643         res = dsp_flush_fd(i->thread_fd);
1644
1645     if (res < 0)
1646         return res;
1647
1648     if (i->app_fd >= 0)
1649         res = dsp_flush_fd(i->app_fd);
1650
1651     if (res < 0)
1652         return res;
1653
1654     return 0;
1655 }
1656
1657 static int dsp_empty_socket(fd_info *i) {
1658 #ifdef SIOCINQ
1659     int ret = -1;
1660
1661     /* Empty the socket */
1662     for (;;) {
1663         int l;
1664
1665         if (i->thread_fd < 0)
1666             break;
1667
1668         if (ioctl(i->thread_fd, SIOCINQ, &l) < 0) {
1669             debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ: %s\n", strerror(errno));
1670             break;
1671         }
1672
1673         if (!l) {
1674             ret = 0;
1675             break;
1676         }
1677
1678         pa_threaded_mainloop_wait(i->mainloop);
1679     }
1680
1681     return ret;
1682 #else
1683 # warning "Your platform does not support SIOCINQ, something might not work as intended."
1684     return 0;
1685 #endif
1686 }
1687
1688 static int dsp_drain(fd_info *i) {
1689     pa_operation *o = NULL;
1690     int r = -1;
1691
1692     if (!i->mainloop)
1693         return 0;
1694
1695     debug(DEBUG_LEVEL_NORMAL, __FILE__": Draining.\n");
1696
1697     pa_threaded_mainloop_lock(i->mainloop);
1698
1699     if (dsp_empty_socket(i) < 0)
1700         goto fail;
1701
1702     if (!i->play_stream)
1703         goto fail;
1704
1705     debug(DEBUG_LEVEL_NORMAL, __FILE__": Really draining.\n");
1706
1707     if (!(o = pa_stream_drain(i->play_stream, stream_success_cb, i))) {
1708         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_drain(): %s\n", pa_strerror(pa_context_errno(i->context)));
1709         goto fail;
1710     }
1711
1712     i->operation_success = 0;
1713     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1714         PLAYBACK_STREAM_CHECK_DEAD_GOTO(i, fail);
1715
1716         pa_threaded_mainloop_wait(i->mainloop);
1717     }
1718
1719     if (!i->operation_success) {
1720         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_drain() 2: %s\n", pa_strerror(pa_context_errno(i->context)));
1721         goto fail;
1722     }
1723
1724     r = 0;
1725
1726 fail:
1727
1728     if (o)
1729         pa_operation_unref(o);
1730
1731     pa_threaded_mainloop_unlock(i->mainloop);
1732
1733     return 0;
1734 }
1735
1736 static int dsp_trigger(fd_info *i) {
1737     pa_operation *o = NULL;
1738     int r = -1;
1739
1740     if (!i->play_stream)
1741         return 0;
1742
1743     pa_threaded_mainloop_lock(i->mainloop);
1744
1745     if (dsp_empty_socket(i) < 0)
1746         goto fail;
1747
1748     debug(DEBUG_LEVEL_NORMAL, __FILE__": Triggering.\n");
1749
1750     if (!(o = pa_stream_trigger(i->play_stream, stream_success_cb, i))) {
1751         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_trigger(): %s\n", pa_strerror(pa_context_errno(i->context)));
1752         goto fail;
1753     }
1754
1755     i->operation_success = 0;
1756     while (!pa_operation_get_state(o) != PA_OPERATION_DONE) {
1757         PLAYBACK_STREAM_CHECK_DEAD_GOTO(i, fail);
1758
1759         pa_threaded_mainloop_wait(i->mainloop);
1760     }
1761
1762     if (!i->operation_success) {
1763         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_trigger(): %s\n", pa_strerror(pa_context_errno(i->context)));
1764         goto fail;
1765     }
1766
1767     r = 0;
1768
1769 fail:
1770
1771     if (o)
1772         pa_operation_unref(o);
1773
1774     pa_threaded_mainloop_unlock(i->mainloop);
1775
1776     return 0;
1777 }
1778
1779 static int dsp_ioctl(fd_info *i, unsigned long request, void*argp, int *_errno) {
1780     int ret = -1;
1781
1782     switch (request) {
1783         case SNDCTL_DSP_SETFMT: {
1784             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_SETFMT: %i\n", *(int*) argp);
1785
1786             pa_threaded_mainloop_lock(i->mainloop);
1787
1788             if (*(int*) argp == AFMT_QUERY)
1789                 *(int*) argp = map_format_back(i->sample_spec.format);
1790             else {
1791                 map_format((int*) argp, &i->sample_spec);
1792                 free_streams(i);
1793             }
1794
1795             pa_threaded_mainloop_unlock(i->mainloop);
1796             break;
1797         }
1798
1799         case SNDCTL_DSP_SPEED: {
1800             pa_sample_spec ss;
1801             int valid;
1802             char t[256];
1803
1804             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_SPEED: %i\n", *(int*) argp);
1805
1806             pa_threaded_mainloop_lock(i->mainloop);
1807
1808             ss = i->sample_spec;
1809             ss.rate = *(int*) argp;
1810
1811             if ((valid = pa_sample_spec_valid(&ss))) {
1812                 i->sample_spec = ss;
1813                 free_streams(i);
1814             }
1815
1816             debug(DEBUG_LEVEL_NORMAL, __FILE__": ss: %s\n", pa_sample_spec_snprint(t, sizeof(t), &i->sample_spec));
1817
1818             pa_threaded_mainloop_unlock(i->mainloop);
1819
1820             if (!valid) {
1821                 *_errno = EINVAL;
1822                 goto fail;
1823             }
1824
1825             break;
1826         }
1827
1828         case SNDCTL_DSP_STEREO:
1829             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_STEREO: %i\n", *(int*) argp);
1830
1831             pa_threaded_mainloop_lock(i->mainloop);
1832
1833             i->sample_spec.channels = *(int*) argp ? 2 : 1;
1834             free_streams(i);
1835
1836             pa_threaded_mainloop_unlock(i->mainloop);
1837             return 0;
1838
1839         case SNDCTL_DSP_CHANNELS: {
1840             pa_sample_spec ss;
1841             int valid;
1842
1843             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_CHANNELS: %i\n", *(int*) argp);
1844
1845             pa_threaded_mainloop_lock(i->mainloop);
1846
1847             ss = i->sample_spec;
1848             ss.channels = *(int*) argp;
1849
1850             if ((valid = pa_sample_spec_valid(&ss))) {
1851                 i->sample_spec = ss;
1852                 free_streams(i);
1853             }
1854
1855             pa_threaded_mainloop_unlock(i->mainloop);
1856
1857             if (!valid) {
1858                 *_errno = EINVAL;
1859                 goto fail;
1860             }
1861
1862             break;
1863         }
1864
1865         case SNDCTL_DSP_GETBLKSIZE:
1866             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETBLKSIZE\n");
1867
1868             pa_threaded_mainloop_lock(i->mainloop);
1869
1870             fix_metrics(i);
1871             *(int*) argp = i->fragment_size;
1872
1873             pa_threaded_mainloop_unlock(i->mainloop);
1874
1875             break;
1876
1877         case SNDCTL_DSP_SETFRAGMENT:
1878             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_SETFRAGMENT: 0x%8x\n", *(int*) argp);
1879
1880             pa_threaded_mainloop_lock(i->mainloop);
1881
1882             i->fragment_size = 1 << (*(int*) argp);
1883             i->n_fragments = (*(int*) argp) >> 16;
1884
1885             /* 0x7FFF means that we can set whatever we like */
1886             if (i->n_fragments == 0x7FFF)
1887                 i->n_fragments = 12;
1888
1889             free_streams(i);
1890
1891             pa_threaded_mainloop_unlock(i->mainloop);
1892
1893             break;
1894
1895         case SNDCTL_DSP_GETCAPS:
1896             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_CAPS\n");
1897
1898             *(int*)  argp = DSP_CAP_DUPLEX
1899 #ifdef DSP_CAP_MULTI
1900               | DSP_CAP_MULTI
1901 #endif
1902               ;
1903             break;
1904
1905         case SNDCTL_DSP_GETODELAY: {
1906             int l;
1907
1908             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETODELAY\n");
1909
1910             pa_threaded_mainloop_lock(i->mainloop);
1911
1912             *(int*) argp = 0;
1913
1914             for (;;) {
1915                 pa_usec_t usec;
1916
1917                 PLAYBACK_STREAM_CHECK_DEAD_GOTO(i, exit_loop);
1918
1919                 if (pa_stream_get_latency(i->play_stream, &usec, NULL) >= 0) {
1920                     *(int*) argp = pa_usec_to_bytes(usec, &i->sample_spec);
1921                     break;
1922                 }
1923
1924                 if (pa_context_errno(i->context) != PA_ERR_NODATA) {
1925                     debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_get_latency(): %s\n", pa_strerror(pa_context_errno(i->context)));
1926                     break;
1927                 }
1928
1929                 pa_threaded_mainloop_wait(i->mainloop);
1930             }
1931
1932         exit_loop:
1933
1934 #ifdef SIOCINQ
1935             if (ioctl(i->thread_fd, SIOCINQ, &l) < 0)
1936                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ failed: %s\n", strerror(errno));
1937             else
1938                 *(int*) argp += l;
1939 #else
1940 # warning "Your platform does not support SIOCINQ, something might not work as intended."
1941 #endif
1942
1943             pa_threaded_mainloop_unlock(i->mainloop);
1944
1945             debug(DEBUG_LEVEL_NORMAL, __FILE__": ODELAY: %i\n", *(int*) argp);
1946
1947             break;
1948         }
1949
1950         case SNDCTL_DSP_RESET: {
1951             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_RESET\n");
1952
1953             pa_threaded_mainloop_lock(i->mainloop);
1954
1955             free_streams(i);
1956             dsp_flush_socket(i);
1957             reset_params(i);
1958
1959             i->optr_n_blocks = 0;
1960
1961             pa_threaded_mainloop_unlock(i->mainloop);
1962             break;
1963         }
1964
1965         case SNDCTL_DSP_GETFMTS: {
1966             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETFMTS\n");
1967
1968             *(int*) argp = AFMT_MU_LAW|AFMT_A_LAW|AFMT_U8|AFMT_S16_LE|AFMT_S16_BE;
1969             break;
1970         }
1971
1972         case SNDCTL_DSP_POST:
1973             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_POST\n");
1974
1975             if (dsp_trigger(i) < 0)
1976                 *_errno = EIO;
1977             break;
1978
1979         case SNDCTL_DSP_SYNC:
1980             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_SYNC\n");
1981
1982             if (dsp_drain(i) < 0)
1983                 *_errno = EIO;
1984
1985             break;
1986
1987         case SNDCTL_DSP_GETOSPACE:
1988         case SNDCTL_DSP_GETISPACE: {
1989             audio_buf_info *bi = (audio_buf_info*) argp;
1990             int l = 0;
1991             size_t k = 0;
1992
1993             if (request == SNDCTL_DSP_GETOSPACE)
1994                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETOSPACE\n");
1995             else
1996                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETISPACE\n");
1997
1998             pa_threaded_mainloop_lock(i->mainloop);
1999
2000             fix_metrics(i);
2001
2002             if (request == SNDCTL_DSP_GETOSPACE) {
2003                 if (i->play_stream) {
2004                     if ((k = pa_stream_writable_size(i->play_stream)) == (size_t) -1)
2005                         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_writable_size(): %s\n", pa_strerror(pa_context_errno(i->context)));
2006                 } else
2007                     k = i->fragment_size * i->n_fragments;
2008
2009 #ifdef SIOCINQ
2010                 if (ioctl(i->thread_fd, SIOCINQ, &l) < 0) {
2011                     debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ failed: %s\n", strerror(errno));
2012                     l = 0;
2013                 }
2014 #else
2015 # warning "Your platform does not dsp_flush_fd, something might not work as intended."
2016 #endif
2017
2018                 bi->bytes = k > (size_t) l ? k - l : 0;
2019             } else {
2020                 if (i->rec_stream) {
2021                     if ((k = pa_stream_readable_size(i->rec_stream)) == (size_t) -1)
2022                         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_readable_size(): %s\n", pa_strerror(pa_context_errno(i->context)));
2023                 } else
2024                     k = 0;
2025
2026 #ifdef SIOCINQ
2027                 if (ioctl(i->app_fd, SIOCINQ, &l) < 0) {
2028                     debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ failed: %s\n", strerror(errno));
2029                     l = 0;
2030                 }
2031 #else
2032 # warning "Your platform does not dsp_flush_fd, something might not work as intended."
2033 #endif
2034                 bi->bytes = k + l;
2035             }
2036
2037             bi->fragsize = i->fragment_size;
2038             bi->fragstotal = i->n_fragments;
2039             bi->fragments = bi->bytes / bi->fragsize;
2040
2041             pa_threaded_mainloop_unlock(i->mainloop);
2042
2043             debug(DEBUG_LEVEL_NORMAL, __FILE__": fragsize=%i, fragstotal=%i, bytes=%i, fragments=%i\n", bi->fragsize, bi->fragstotal, bi->bytes, bi->fragments);
2044
2045             break;
2046         }
2047
2048         case SOUND_PCM_READ_RATE:
2049             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_PCM_READ_RATE\n");
2050
2051             pa_threaded_mainloop_lock(i->mainloop);
2052             *(int*) argp = i->sample_spec.rate;
2053             pa_threaded_mainloop_unlock(i->mainloop);
2054             break;
2055
2056         case SOUND_PCM_READ_CHANNELS:
2057             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_PCM_READ_CHANNELS\n");
2058
2059             pa_threaded_mainloop_lock(i->mainloop);
2060             *(int*) argp = i->sample_spec.channels;
2061             pa_threaded_mainloop_unlock(i->mainloop);
2062             break;
2063
2064         case SOUND_PCM_READ_BITS:
2065             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_PCM_READ_BITS\n");
2066
2067             pa_threaded_mainloop_lock(i->mainloop);
2068             *(int*) argp = pa_sample_size(&i->sample_spec)*8;
2069             pa_threaded_mainloop_unlock(i->mainloop);
2070             break;
2071
2072         case SNDCTL_DSP_GETOPTR: {
2073             count_info *info;
2074
2075             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETOPTR\n");
2076
2077             info = (count_info*) argp;
2078             memset(info, 0, sizeof(*info));
2079
2080             pa_threaded_mainloop_lock(i->mainloop);
2081
2082             for (;;) {
2083                 pa_usec_t usec;
2084
2085                 PLAYBACK_STREAM_CHECK_DEAD_GOTO(i, exit_loop);
2086
2087                 if (pa_stream_get_time(i->play_stream, &usec) >= 0) {
2088                     size_t k = pa_usec_to_bytes(usec, &i->sample_spec);
2089                     int m;
2090
2091                     info->bytes = (int) k;
2092                     m = k / i->fragment_size;
2093                     info->blocks = m - i->optr_n_blocks;
2094                     i->optr_n_blocks = m;
2095
2096                     break;
2097                 }
2098
2099                 if (pa_context_errno(i->context) != PA_ERR_NODATA) {
2100                     debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_get_latency(): %s\n", pa_strerror(pa_context_errno(i->context)));
2101                     break;
2102                 }
2103
2104                 pa_threaded_mainloop_wait(i->mainloop);
2105             }
2106
2107             pa_threaded_mainloop_unlock(i->mainloop);
2108
2109             debug(DEBUG_LEVEL_NORMAL, __FILE__": GETOPTR bytes=%i, blocks=%i, ptr=%i\n", info->bytes, info->blocks, info->ptr);
2110
2111             break;
2112         }
2113
2114         case SNDCTL_DSP_GETIPTR:
2115             debug(DEBUG_LEVEL_NORMAL, __FILE__": invalid ioctl SNDCTL_DSP_GETIPTR\n");
2116             goto inval;
2117
2118         default:
2119             debug(DEBUG_LEVEL_NORMAL, __FILE__": unknown ioctl 0x%08lx\n", request);
2120
2121 inval:
2122             *_errno = EINVAL;
2123             goto fail;
2124     }
2125
2126     ret = 0;
2127
2128 fail:
2129
2130     return ret;
2131 }
2132
2133 int ioctl(int fd, unsigned long request, ...) {
2134     fd_info *i;
2135     va_list args;
2136     void *argp;
2137     int r, _errno = 0;
2138
2139     debug(DEBUG_LEVEL_VERBOSE, __FILE__": ioctl()\n");
2140
2141     va_start(args, request);
2142     argp = va_arg(args, void *);
2143     va_end(args);
2144
2145     if (!function_enter()) {
2146         LOAD_IOCTL_FUNC();
2147         return _ioctl(fd, request, argp);
2148     }
2149
2150     if (!(i = fd_info_find(fd))) {
2151         function_exit();
2152         LOAD_IOCTL_FUNC();
2153         return _ioctl(fd, request, argp);
2154     }
2155
2156     if (i->type == FD_INFO_MIXER)
2157         r = mixer_ioctl(i, request, argp, &_errno);
2158     else
2159         r = dsp_ioctl(i, request, argp, &_errno);
2160
2161     fd_info_unref(i);
2162
2163     if (_errno)
2164         errno = _errno;
2165
2166     function_exit();
2167
2168     return r;
2169 }
2170
2171 int close(int fd) {
2172     fd_info *i;
2173
2174     debug(DEBUG_LEVEL_VERBOSE, __FILE__": close()\n");
2175
2176     if (!function_enter()) {
2177         LOAD_CLOSE_FUNC();
2178         return _close(fd);
2179     }
2180
2181     if (!(i = fd_info_find(fd))) {
2182         function_exit();
2183         LOAD_CLOSE_FUNC();
2184         return _close(fd);
2185     }
2186
2187     fd_info_remove_from_list(i);
2188     fd_info_unref(i);
2189
2190     function_exit();
2191
2192     return 0;
2193 }
2194
2195 int access(const char *pathname, int mode) {
2196
2197     if (!pathname) {
2198         /* Firefox needs this. See #27 */
2199         errno = EFAULT;
2200         return -1;
2201     }
2202
2203     debug(DEBUG_LEVEL_VERBOSE, __FILE__": access(%s)\n", pathname);
2204
2205     if (strcmp(pathname, "/dev/dsp") != 0 &&
2206         strcmp(pathname, "/dev/adsp") != 0 &&
2207         strcmp(pathname, "/dev/sndstat") != 0 &&
2208         strcmp(pathname, "/dev/mixer") != 0) {
2209         LOAD_ACCESS_FUNC();
2210         return _access(pathname, mode);
2211     }
2212
2213     if (mode & (W_OK | X_OK)) {
2214         debug(DEBUG_LEVEL_NORMAL, __FILE__": access(%s, %x) = EACCESS\n", pathname, mode);
2215         errno = EACCES;
2216         return -1;
2217     }
2218
2219     debug(DEBUG_LEVEL_NORMAL, __FILE__": access(%s, %x) = OK\n", pathname, mode);
2220
2221     return 0;
2222 }
2223
2224 #ifdef HAVE_OPEN64
2225
2226 int open64(const char *filename, int flags, ...) {
2227     va_list args;
2228     mode_t mode = 0;
2229
2230     debug(DEBUG_LEVEL_VERBOSE, __FILE__": open64(%s)\n", filename);
2231
2232     va_start(args, flags);
2233     if (flags & O_CREAT)
2234         mode = va_arg(args, mode_t);
2235     va_end(args);
2236
2237     if (strcmp(filename, "/dev/dsp") != 0 &&
2238         strcmp(filename, "/dev/adsp") != 0 &&
2239         strcmp(filename, "/dev/sndstat") != 0 &&
2240         strcmp(filename, "/dev/mixer") != 0) {
2241         LOAD_OPEN64_FUNC();
2242         return _open64(filename, flags, mode);
2243     }
2244
2245     return open(filename, flags, mode);
2246 }
2247
2248 #endif
2249
2250 FILE* fopen(const char *filename, const char *mode) {
2251     FILE *f = NULL;
2252     int fd;
2253     mode_t m;
2254
2255     debug(DEBUG_LEVEL_VERBOSE, __FILE__": fopen(%s)\n", filename);
2256
2257     if (strcmp(filename, "/dev/dsp") != 0 &&
2258         strcmp(filename, "/dev/adsp") != 0 &&
2259         strcmp(filename, "/dev/sndstat") != 0 &&
2260         strcmp(filename, "/dev/mixer") != 0) {
2261         LOAD_FOPEN_FUNC();
2262         return _fopen(filename, mode);
2263     }
2264
2265     switch (mode[0]) {
2266     case 'r':
2267         m = O_RDONLY;
2268         break;
2269     case 'w':
2270     case 'a':
2271         m = O_WRONLY;
2272         break;
2273     default:
2274         errno = EINVAL;
2275         return NULL;
2276     }
2277
2278     if ((((mode[1] == 'b') || (mode[1] == 't')) && (mode[2] == '+')) || (mode[1] == '+'))
2279         m = O_RDWR;
2280
2281     if ((fd = open(filename, m)) < 0)
2282         return NULL;
2283
2284     if (!(f = fdopen(fd, mode))) {
2285         close(fd);
2286         return NULL;
2287     }
2288
2289     return f;
2290 }
2291
2292 #ifdef HAVE_OPEN64
2293
2294 FILE *fopen64(const char *filename, const char *mode) {
2295
2296     debug(DEBUG_LEVEL_VERBOSE, __FILE__": fopen64(%s)\n", filename);
2297
2298     if (strcmp(filename, "/dev/dsp") != 0 &&
2299         strcmp(filename, "/dev/adsp") != 0 &&
2300         strcmp(filename, "/dev/sndstat") != 0 &&
2301         strcmp(filename, "/dev/mixer") != 0) {
2302         LOAD_FOPEN64_FUNC();
2303         return _fopen64(filename, mode);
2304     }
2305
2306     return fopen(filename, mode);
2307 }
2308
2309 #endif
2310
2311 int fclose(FILE *f) {
2312     fd_info *i;
2313
2314     debug(DEBUG_LEVEL_VERBOSE, __FILE__": fclose()\n");
2315
2316     if (!function_enter()) {
2317         LOAD_FCLOSE_FUNC();
2318         return _fclose(f);
2319     }
2320
2321     if (!(i = fd_info_find(fileno(f)))) {
2322         function_exit();
2323         LOAD_FCLOSE_FUNC();
2324         return _fclose(f);
2325     }
2326
2327     fd_info_remove_from_list(i);
2328
2329     /* Dirty trick to avoid that the fd is not freed twice, once by us
2330      * and once by the real fclose() */
2331     i->app_fd = -1;
2332
2333     fd_info_unref(i);
2334
2335     function_exit();
2336
2337     LOAD_FCLOSE_FUNC();
2338     return _fclose(f);
2339 }