dlls/winealsa.drv/alsa.c

   1 /*
   2  * Wine Driver for ALSA
   3  *
   4  * Copyright    2002 Eric Pouech
   5  * Copyright    2007 Maarten Lankhorst
   6  *
   7  * This file has a few shared generic subroutines shared among the alsa
   8  * implementation.
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  23  */
  24
  25 #include "config.h"
  26
  27 #include <stdarg.h>
  28
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "wingdi.h"
  32 #include "winuser.h"
  33 #include "mmddk.h"
  34
  35 #include "ks.h"
  36 #include "guiddef.h"
  37 #include "ksmedia.h"
  38
  39 #include "alsa.h"
  40
  41 #ifdef HAVE_ALSA
  42
  43 #include "wine/library.h"
  44 #include "wine/unicode.h"
  45 #include "wine/debug.h"
  46
  47 WINE_DEFAULT_DEBUG_CHANNEL(alsa);
  48 /* unless someone makes a wineserver kernel module, Unix pipes are faster than win32 events */
  49 #define USE_PIPE_SYNC
  50
  51 #ifdef USE_PIPE_SYNC
  52 #define INIT_OMR(omr) do { if (pipe(omr->msg_pipe) < 0) { omr->msg_pipe[0] = omr->msg_pipe[1] = -1; } } while (0)
  53 #define CLOSE_OMR(omr) do { close(omr->msg_pipe[0]); close(omr->msg_pipe[1]); } while (0)
  54 #define SIGNAL_OMR(omr) do { int x = 0; write((omr)->msg_pipe[1], &x, sizeof(x)); } while (0)
  55 #define CLEAR_OMR(omr) do { int x = 0; read((omr)->msg_pipe[0], &x, sizeof(x)); } while (0)
  56 #define RESET_OMR(omr) do { } while (0)
  57 #define WAIT_OMR(omr, sleep) \
  58   do { struct pollfd pfd; pfd.fd = (omr)->msg_pipe[0]; \
  59        pfd.events = POLLIN; poll(&pfd, 1, sleep); } while (0)
  60 #else
  61 #define INIT_OMR(omr) do { omr->msg_event = CreateEventW(NULL, FALSE, FALSE, NULL); } while (0)
  62 #define CLOSE_OMR(omr) do { CloseHandle(omr->msg_event); } while (0)
  63 #define SIGNAL_OMR(omr) do { SetEvent((omr)->msg_event); } while (0)
  64 #define CLEAR_OMR(omr) do { } while (0)
  65 #define RESET_OMR(omr) do { ResetEvent((omr)->msg_event); } while (0)
  66 #define WAIT_OMR(omr, sleep) \
  67   do { WaitForSingleObject((omr)->msg_event, sleep); } while (0)
  68 #endif
  69
  70 #define ALSA_RING_BUFFER_INCREMENT      64
  71
  72 /******************************************************************
  73  *              ALSA_InitRingMessage
  74  *
  75  * Initialize the ring of messages for passing between driver's caller and playback/record
  76  * thread
  77  */
  78 int ALSA_InitRingMessage(ALSA_MSG_RING* omr)
  79 {
  80     omr->msg_toget = 0;
  81     omr->msg_tosave = 0;
  82     INIT_OMR(omr);
  83     omr->ring_buffer_size = ALSA_RING_BUFFER_INCREMENT;
  84     omr->messages = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,omr->ring_buffer_size * sizeof(ALSA_MSG));
  85
  86     InitializeCriticalSection(&omr->msg_crst);
  87     omr->msg_crst.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": ALSA_MSG_RING.msg_crst");
  88     return 0;
  89 }
  90
  91 /******************************************************************
  92  *              ALSA_DestroyRingMessage
  93  *
  94  */
  95 int ALSA_DestroyRingMessage(ALSA_MSG_RING* omr)
  96 {
  97     CLOSE_OMR(omr);
  98     HeapFree(GetProcessHeap(),0,omr->messages);
  99     omr->ring_buffer_size = 0;
 100     omr->msg_crst.DebugInfo->Spare[0] = 0;
 101     DeleteCriticalSection(&omr->msg_crst);
 102     return 0;
 103 }
 104 /******************************************************************
 105  *              ALSA_ResetRingMessage
 106  *
 107  */
 108 void ALSA_ResetRingMessage(ALSA_MSG_RING* omr)
 109 {
 110     RESET_OMR(omr);
 111 }
 112
 113 /******************************************************************
 114  *              ALSA_WaitRingMessage
 115  *
 116  */
 117 void ALSA_WaitRingMessage(ALSA_MSG_RING* omr, DWORD sleep)
 118 {
 119     WAIT_OMR(omr, sleep);
 120 }
 121
 122 /******************************************************************
 123  *              ALSA_AddRingMessage
 124  *
 125  * Inserts a new message into the ring (should be called from DriverProc derived routines)
 126  */
 127 int ALSA_AddRingMessage(ALSA_MSG_RING* omr, enum win_wm_message msg, DWORD_PTR param, BOOL wait)
 128 {
 129     HANDLE      hEvent = INVALID_HANDLE_VALUE;
 130
 131     EnterCriticalSection(&omr->msg_crst);
 132     if ((omr->msg_toget == ((omr->msg_tosave + 1) % omr->ring_buffer_size)))
 133     {
 134         int old_ring_buffer_size = omr->ring_buffer_size;
 135         omr->ring_buffer_size += ALSA_RING_BUFFER_INCREMENT;
 136         omr->messages = HeapReAlloc(GetProcessHeap(),0,omr->messages, omr->ring_buffer_size * sizeof(ALSA_MSG));
 137         /* Now we need to rearrange the ring buffer so that the new
 138            buffers just allocated are in between omr->msg_tosave and
 139            omr->msg_toget.
 140         */
 141         if (omr->msg_tosave < omr->msg_toget)
 142         {
 143             memmove(&(omr->messages[omr->msg_toget + ALSA_RING_BUFFER_INCREMENT]),
 144                     &(omr->messages[omr->msg_toget]),
 145                     sizeof(ALSA_MSG)*(old_ring_buffer_size - omr->msg_toget)
 146                     );
 147             omr->msg_toget += ALSA_RING_BUFFER_INCREMENT;
 148         }
 149     }
 150     if (wait)
 151     {
 152         hEvent = CreateEventW(NULL, FALSE, FALSE, NULL);
 153         if (hEvent == INVALID_HANDLE_VALUE)
 154         {
 155             ERR("can't create event !?\n");
 156             LeaveCriticalSection(&omr->msg_crst);
 157             return 0;
 158         }
 159         if (omr->msg_toget != omr->msg_tosave && omr->messages[omr->msg_toget].msg != WINE_WM_HEADER)
 160             FIXME("two fast messages in the queue!!!! toget = %d(%s), tosave=%d(%s)\n",
 161                   omr->msg_toget,ALSA_getCmdString(omr->messages[omr->msg_toget].msg),
 162                   omr->msg_tosave,ALSA_getCmdString(omr->messages[omr->msg_tosave].msg));
 163
 164         /* fast messages have to be added at the start of the queue */
 165         omr->msg_toget = (omr->msg_toget + omr->ring_buffer_size - 1) % omr->ring_buffer_size;
 166
 167         omr->messages[omr->msg_toget].msg = msg;
 168         omr->messages[omr->msg_toget].param = param;
 169         omr->messages[omr->msg_toget].hEvent = hEvent;
 170     }
 171     else
 172     {
 173         omr->messages[omr->msg_tosave].msg = msg;
 174         omr->messages[omr->msg_tosave].param = param;
 175         omr->messages[omr->msg_tosave].hEvent = INVALID_HANDLE_VALUE;
 176         omr->msg_tosave = (omr->msg_tosave + 1) % omr->ring_buffer_size;
 177     }
 178     LeaveCriticalSection(&omr->msg_crst);
 179     /* signal a new message */
 180     SIGNAL_OMR(omr);
 181     if (wait)
 182     {
 183         /* wait for playback/record thread to have processed the message */
 184         WaitForSingleObject(hEvent, INFINITE);
 185         CloseHandle(hEvent);
 186     }
 187     return 1;
 188 }
 189
 190 /******************************************************************
 191  *              ALSA_RetrieveRingMessage
 192  *
 193  * Get a message from the ring. Should be called by the playback/record thread.
 194  */
 195 int ALSA_RetrieveRingMessage(ALSA_MSG_RING* omr, enum win_wm_message *msg,
 196                              DWORD_PTR *param, HANDLE *hEvent)
 197 {
 198     EnterCriticalSection(&omr->msg_crst);
 199
 200     if (omr->msg_toget == omr->msg_tosave) /* buffer empty ? */
 201     {
 202         LeaveCriticalSection(&omr->msg_crst);
 203         return 0;
 204     }
 205
 206     *msg = omr->messages[omr->msg_toget].msg;
 207     omr->messages[omr->msg_toget].msg = 0;
 208     *param = omr->messages[omr->msg_toget].param;
 209     *hEvent = omr->messages[omr->msg_toget].hEvent;
 210     omr->msg_toget = (omr->msg_toget + 1) % omr->ring_buffer_size;
 211     CLEAR_OMR(omr);
 212     LeaveCriticalSection(&omr->msg_crst);
 213     return 1;
 214 }
 215
 216 /*======================================================================*
 217  *                  Utility functions                                   *
 218  *======================================================================*/
 219
 220 /* These strings used only for tracing */
 221 const char * ALSA_getCmdString(enum win_wm_message msg)
 222 {
 223     static char unknown[32];
 224 #define MSG_TO_STR(x) case x: return #x
 225     switch(msg) {
 226     MSG_TO_STR(WINE_WM_PAUSING);
 227     MSG_TO_STR(WINE_WM_RESTARTING);
 228     MSG_TO_STR(WINE_WM_RESETTING);
 229     MSG_TO_STR(WINE_WM_HEADER);
 230     MSG_TO_STR(WINE_WM_UPDATE);
 231     MSG_TO_STR(WINE_WM_BREAKLOOP);
 232     MSG_TO_STR(WINE_WM_CLOSING);
 233     MSG_TO_STR(WINE_WM_STARTING);
 234     MSG_TO_STR(WINE_WM_STOPPING);
 235     }
 236 #undef MSG_TO_STR
 237     sprintf(unknown, "UNKNOWN(0x%08x)", msg);
 238     return unknown;
 239 }
 240
 241 const char * ALSA_getMessage(UINT msg)
 242 {
 243     static char unknown[32];
 244 #define MSG_TO_STR(x) case x: return #x
 245     switch(msg) {
 246     MSG_TO_STR(DRVM_INIT);
 247     MSG_TO_STR(DRVM_EXIT);
 248     MSG_TO_STR(DRVM_ENABLE);
 249     MSG_TO_STR(DRVM_DISABLE);
 250     MSG_TO_STR(WIDM_OPEN);
 251     MSG_TO_STR(WIDM_CLOSE);
 252     MSG_TO_STR(WIDM_ADDBUFFER);
 253     MSG_TO_STR(WIDM_PREPARE);
 254     MSG_TO_STR(WIDM_UNPREPARE);
 255     MSG_TO_STR(WIDM_GETDEVCAPS);
 256     MSG_TO_STR(WIDM_GETNUMDEVS);
 257     MSG_TO_STR(WIDM_GETPOS);
 258     MSG_TO_STR(WIDM_RESET);
 259     MSG_TO_STR(WIDM_START);
 260     MSG_TO_STR(WIDM_STOP);
 261     MSG_TO_STR(WODM_OPEN);
 262     MSG_TO_STR(WODM_CLOSE);
 263     MSG_TO_STR(WODM_WRITE);
 264     MSG_TO_STR(WODM_PAUSE);
 265     MSG_TO_STR(WODM_GETPOS);
 266     MSG_TO_STR(WODM_BREAKLOOP);
 267     MSG_TO_STR(WODM_PREPARE);
 268     MSG_TO_STR(WODM_UNPREPARE);
 269     MSG_TO_STR(WODM_GETDEVCAPS);
 270     MSG_TO_STR(WODM_GETNUMDEVS);
 271     MSG_TO_STR(WODM_GETPITCH);
 272     MSG_TO_STR(WODM_SETPITCH);
 273     MSG_TO_STR(WODM_GETPLAYBACKRATE);
 274     MSG_TO_STR(WODM_SETPLAYBACKRATE);
 275     MSG_TO_STR(WODM_GETVOLUME);
 276     MSG_TO_STR(WODM_SETVOLUME);
 277     MSG_TO_STR(WODM_RESTART);
 278     MSG_TO_STR(WODM_RESET);
 279     MSG_TO_STR(DRV_QUERYDEVICEINTERFACESIZE);
 280     MSG_TO_STR(DRV_QUERYDEVICEINTERFACE);
 281     MSG_TO_STR(DRV_QUERYDSOUNDIFACE);
 282     MSG_TO_STR(DRV_QUERYDSOUNDDESC);
 283     }
 284 #undef MSG_TO_STR
 285     sprintf(unknown, "UNKNOWN(0x%04x)", msg);
 286     return unknown;
 287 }
 288
 289 const char * ALSA_getFormat(WORD wFormatTag)
 290 {
 291     static char unknown[32];
 292 #define FMT_TO_STR(x) case x: return #x
 293     switch(wFormatTag) {
 294     FMT_TO_STR(WAVE_FORMAT_PCM);
 295     FMT_TO_STR(WAVE_FORMAT_EXTENSIBLE);
 296     FMT_TO_STR(WAVE_FORMAT_MULAW);
 297     FMT_TO_STR(WAVE_FORMAT_ALAW);
 298     FMT_TO_STR(WAVE_FORMAT_ADPCM);
 299     }
 300 #undef FMT_TO_STR
 301     sprintf(unknown, "UNKNOWN(0x%04x)", wFormatTag);
 302     return unknown;
 303 }
 304
 305 /* Allow 1% deviation for sample rates (some ES137x cards) */
 306 BOOL ALSA_NearMatch(int rate1, int rate2)
 307 {
 308     return (((100 * (rate1 - rate2)) / rate1) == 0);
 309 }
 310
 311 DWORD ALSA_bytes_to_mmtime(LPMMTIME lpTime, DWORD position, WAVEFORMATPCMEX* format)
 312 {
 313     TRACE("wType=%04X wBitsPerSample=%u nSamplesPerSec=%u nChannels=%u nAvgBytesPerSec=%u\n",
 314           lpTime->wType, format->Format.wBitsPerSample, format->Format.nSamplesPerSec,
 315           format->Format.nChannels, format->Format.nAvgBytesPerSec);
 316     TRACE("Position in bytes=%u\n", position);
 317
 318     switch (lpTime->wType) {
 319     case TIME_SAMPLES:
 320         lpTime->u.sample = position / (format->Format.wBitsPerSample / 8 * format->Format.nChannels);
 321         TRACE("TIME_SAMPLES=%u\n", lpTime->u.sample);
 322         break;
 323     case TIME_MS:
 324         lpTime->u.ms = 1000.0 * position / (format->Format.wBitsPerSample / 8 * format->Format.nChannels * format->Format.nSamplesPerSec);
 325         TRACE("TIME_MS=%u\n", lpTime->u.ms);
 326         break;
 327     case TIME_SMPTE:
 328         lpTime->u.smpte.fps = 30;
 329         position = position / (format->Format.wBitsPerSample / 8 * format->Format.nChannels);
 330         position += (format->Format.nSamplesPerSec / lpTime->u.smpte.fps) - 1; /* round up */
 331         lpTime->u.smpte.sec = position / format->Format.nSamplesPerSec;
 332         position -= lpTime->u.smpte.sec * format->Format.nSamplesPerSec;
 333         lpTime->u.smpte.min = lpTime->u.smpte.sec / 60;
 334         lpTime->u.smpte.sec -= 60 * lpTime->u.smpte.min;
 335         lpTime->u.smpte.hour = lpTime->u.smpte.min / 60;
 336         lpTime->u.smpte.min -= 60 * lpTime->u.smpte.hour;
 337         lpTime->u.smpte.fps = 30;
 338         lpTime->u.smpte.frame = position * lpTime->u.smpte.fps / format->Format.nSamplesPerSec;
 339         TRACE("TIME_SMPTE=%02u:%02u:%02u:%02u\n",
 340               lpTime->u.smpte.hour, lpTime->u.smpte.min,
 341               lpTime->u.smpte.sec, lpTime->u.smpte.frame);
 342         break;
 343     default:
 344         WARN("Format %d not supported, using TIME_BYTES !\n", lpTime->wType);
 345         lpTime->wType = TIME_BYTES;
 346         /* fall through */
 347     case TIME_BYTES:
 348         lpTime->u.cb = position;
 349         TRACE("TIME_BYTES=%u\n", lpTime->u.cb);
 350         break;
 351     }
 352     return MMSYSERR_NOERROR;
 353 }
 354
 355 void ALSA_copyFormat(LPWAVEFORMATEX wf1, LPWAVEFORMATPCMEX wf2)
 356 {
 357     unsigned int iLength;
 358
 359     ZeroMemory(wf2, sizeof(wf2));
 360     if (wf1->wFormatTag == WAVE_FORMAT_PCM)
 361         iLength = sizeof(PCMWAVEFORMAT);
 362     else if (wf1->wFormatTag == WAVE_FORMAT_EXTENSIBLE)
 363         iLength = sizeof(WAVEFORMATPCMEX);
 364     else
 365         iLength = sizeof(WAVEFORMATEX) + wf1->cbSize;
 366     if (iLength > sizeof(WAVEFORMATPCMEX)) {
 367         ERR("calculated %u bytes, capping\n", iLength);
 368         iLength = sizeof(WAVEFORMATPCMEX);
 369     }
 370     memcpy(wf2, wf1, iLength);
 371 }
 372
 373 BOOL ALSA_supportedFormat(LPWAVEFORMATEX wf)
 374 {
 375     TRACE("(%p)\n",wf);
 376
 377     if (wf->nSamplesPerSec<DSBFREQUENCY_MIN||wf->nSamplesPerSec>DSBFREQUENCY_MAX)
 378         return FALSE;
 379
 380     if (wf->wFormatTag == WAVE_FORMAT_PCM) {
 381         if (wf->nChannels==1||wf->nChannels==2) {
 382             if (wf->wBitsPerSample==8||wf->wBitsPerSample==16)
 383                 return TRUE;
 384         }
 385     } else if (wf->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
 386         WAVEFORMATEXTENSIBLE    * wfex = (WAVEFORMATEXTENSIBLE *)wf;
 387
 388         if (wf->cbSize == 22 &&
 389             (IsEqualGUID(&wfex->SubFormat, &KSDATAFORMAT_SUBTYPE_PCM) ||
 390              IsEqualGUID(&wfex->SubFormat, &KSDATAFORMAT_SUBTYPE_IEEE_FLOAT))) {
 391             if (wf->nChannels>=1 && wf->nChannels<=6) {
 392                 if (wf->wBitsPerSample==wfex->Samples.wValidBitsPerSample) {
 393                     if (wf->wBitsPerSample==8||wf->wBitsPerSample==16||
 394                         wf->wBitsPerSample==24||wf->wBitsPerSample==32) {
 395                         return TRUE;
 396                     }
 397                 } else
 398                     WARN("wBitsPerSample != wValidBitsPerSample not supported yet\n");
 399             }
 400         } else
 401             WARN("only KSDATAFORMAT_SUBTYPE_PCM and KSDATAFORMAT_SUBTYPE_IEEE_FLOAT "
 402                  "supported\n");
 403     } else if (wf->wFormatTag == WAVE_FORMAT_MULAW || wf->wFormatTag == WAVE_FORMAT_ALAW) {
 404         if (wf->wBitsPerSample==8)
 405             return TRUE;
 406         else
 407             ERR("WAVE_FORMAT_MULAW and WAVE_FORMAT_ALAW wBitsPerSample must = 8\n");
 408
 409     } else if (wf->wFormatTag == WAVE_FORMAT_ADPCM) {
 410         if (wf->wBitsPerSample==4)
 411             return TRUE;
 412         else
 413             ERR("WAVE_FORMAT_ADPCM wBitsPerSample must = 4\n");
 414     } else
 415         WARN("only WAVE_FORMAT_PCM and WAVE_FORMAT_EXTENSIBLE supported\n");
 416
 417     return FALSE;
 418 }
 419
 420 /*======================================================================*
 421  *                  Low level WAVE implementation                       *
 422  *======================================================================*/
 423
 424 /**************************************************************************
 425  *                      ALSA_CheckSetVolume             [internal]
 426  *
 427  *  Helper function for Alsa volume queries.  This tries to simplify
 428  * the process of managing the volume.  All parameters are optional
 429  * (pass NULL to ignore or not use).
 430  *  Return values are MMSYSERR_NOERROR on success, or !0 on failure;
 431  * error codes are normalized into the possible documented return
 432  * values from waveOutGetVolume.
 433  */
 434 int ALSA_CheckSetVolume(snd_hctl_t *hctl, int *out_left, int *out_right,
 435             int *out_min, int *out_max, int *out_step,
 436             int *new_left, int *new_right)
 437 {
 438     int rc = MMSYSERR_NOERROR;
 439     int value_count = 0;
 440     snd_hctl_elem_t *           elem = NULL;
 441     snd_ctl_elem_info_t *       eleminfop = NULL;
 442     snd_ctl_elem_value_t *      elemvaluep = NULL;
 443     snd_ctl_elem_id_t *         elemidp = NULL;
 444
 445
 446 #define EXIT_ON_ERROR(f,txt,exitcode) do \
 447 { \
 448     int err; \
 449     if ( (err = (f) ) < 0) \
 450     { \
 451         ERR(txt " failed: %s\n", snd_strerror(err)); \
 452         rc = exitcode; \
 453         goto out; \
 454     } \
 455 } while(0)
 456
 457     if (! hctl)
 458         return MMSYSERR_NOTSUPPORTED;
 459
 460     /* Allocate areas to return information about the volume */
 461     EXIT_ON_ERROR(snd_ctl_elem_id_malloc(&elemidp), "snd_ctl_elem_id_malloc", MMSYSERR_NOMEM);
 462     EXIT_ON_ERROR(snd_ctl_elem_value_malloc (&elemvaluep), "snd_ctl_elem_value_malloc", MMSYSERR_NOMEM);
 463     EXIT_ON_ERROR(snd_ctl_elem_info_malloc (&eleminfop), "snd_ctl_elem_info_malloc", MMSYSERR_NOMEM);
 464     snd_ctl_elem_id_clear(elemidp);
 465     snd_ctl_elem_value_clear(elemvaluep);
 466     snd_ctl_elem_info_clear(eleminfop);
 467
 468     /* Setup and find an element id that exactly matches the characteristic we want
 469     ** FIXME:  It is probably short sighted to hard code and fixate on PCM Playback Volume */
 470     snd_ctl_elem_id_set_name(elemidp, "PCM Playback Volume");
 471     snd_ctl_elem_id_set_interface(elemidp, SND_CTL_ELEM_IFACE_MIXER);
 472     elem = snd_hctl_find_elem(hctl, elemidp);
 473     if (elem)
 474     {
 475         /* Read and return volume information */
 476         EXIT_ON_ERROR(snd_hctl_elem_info(elem, eleminfop), "snd_hctl_elem_info", MMSYSERR_NOTSUPPORTED);
 477         value_count = snd_ctl_elem_info_get_count(eleminfop);
 478         if (out_min || out_max || out_step)
 479         {
 480             if (!snd_ctl_elem_info_is_readable(eleminfop))
 481             {
 482                 ERR("snd_ctl_elem_info_is_readable returned false; cannot return info\n");
 483                 rc = MMSYSERR_NOTSUPPORTED;
 484                 goto out;
 485             }
 486
 487             if (out_min)
 488                 *out_min = snd_ctl_elem_info_get_min(eleminfop);
 489
 490             if (out_max)
 491                 *out_max = snd_ctl_elem_info_get_max(eleminfop);
 492
 493             if (out_step)
 494                 *out_step = snd_ctl_elem_info_get_step(eleminfop);
 495         }
 496
 497         if (out_left || out_right)
 498         {
 499             EXIT_ON_ERROR(snd_hctl_elem_read(elem, elemvaluep), "snd_hctl_elem_read", MMSYSERR_NOTSUPPORTED);
 500
 501             if (out_left)
 502                 *out_left = snd_ctl_elem_value_get_integer(elemvaluep, 0);
 503
 504             if (out_right)
 505             {
 506                 if (value_count == 1)
 507                     *out_right = snd_ctl_elem_value_get_integer(elemvaluep, 0);
 508                 else if (value_count == 2)
 509                     *out_right = snd_ctl_elem_value_get_integer(elemvaluep, 1);
 510                 else
 511                 {
 512                     ERR("Unexpected value count %d from snd_ctl_elem_info_get_count while getting volume info\n", value_count);
 513                     rc = -1;
 514                     goto out;
 515                 }
 516             }
 517         }
 518
 519         /* Set the volume */
 520         if (new_left || new_right)
 521         {
 522             EXIT_ON_ERROR(snd_hctl_elem_read(elem, elemvaluep), "snd_hctl_elem_read", MMSYSERR_NOTSUPPORTED);
 523             if (new_left)
 524                 snd_ctl_elem_value_set_integer(elemvaluep, 0, *new_left);
 525             if (new_right)
 526             {
 527                 if (value_count == 1)
 528                     snd_ctl_elem_value_set_integer(elemvaluep, 0, *new_right);
 529                 else if (value_count == 2)
 530                     snd_ctl_elem_value_set_integer(elemvaluep, 1, *new_right);
 531                 else
 532                 {
 533                     ERR("Unexpected value count %d from snd_ctl_elem_info_get_count while setting volume info\n", value_count);
 534                     rc = -1;
 535                     goto out;
 536                 }
 537             }
 538
 539             EXIT_ON_ERROR(snd_hctl_elem_write(elem, elemvaluep), "snd_hctl_elem_write", MMSYSERR_NOTSUPPORTED);
 540         }
 541     }
 542     else
 543     {
 544         ERR("Could not find 'PCM Playback Volume' element\n");
 545         rc = MMSYSERR_NOTSUPPORTED;
 546     }
 547
 548
 549 #undef EXIT_ON_ERROR
 550
 551 out:
 552
 553     if (elemvaluep)
 554         snd_ctl_elem_value_free(elemvaluep);
 555     if (eleminfop)
 556         snd_ctl_elem_info_free(eleminfop);
 557     if (elemidp)
 558         snd_ctl_elem_id_free(elemidp);
 559
 560     return rc;
 561 }
 562
 563
 564 /**************************************************************************
 565  *                      ALSA_XRUNRecovery               [internal]
 566  *
 567  * used to recovery from XRUN errors (buffer underflow/overflow)
 568  */
 569 int ALSA_XRUNRecovery(WINE_WAVEDEV * wwo, int err)
 570 {
 571     if (err == -EPIPE) {    /* under-run */
 572         err = snd_pcm_prepare(wwo->pcm);
 573         if (err < 0)
 574              ERR( "underrun recovery failed. prepare failed: %s\n", snd_strerror(err));
 575         return 0;
 576     } else if (err == -ESTRPIPE) {
 577         while ((err = snd_pcm_resume(wwo->pcm)) == -EAGAIN)
 578             sleep(1);       /* wait until the suspend flag is released */
 579         if (err < 0) {
 580             err = snd_pcm_prepare(wwo->pcm);
 581             if (err < 0)
 582                 ERR("recovery from suspend failed, prepare failed: %s\n", snd_strerror(err));
 583         }
 584         return 0;
 585     }
 586     return err;
 587 }
 588
 589 /**************************************************************************
 590  *                      ALSA_TraceParameters            [internal]
 591  *
 592  * used to trace format changes, hw and sw parameters
 593  */
 594 void ALSA_TraceParameters(snd_pcm_hw_params_t * hw_params, snd_pcm_sw_params_t * sw, int full)
 595 {
 596     int err;
 597     snd_pcm_format_t   format;
 598     snd_pcm_access_t   access;
 599
 600 #define X(x) ((x)? "true" : "false")
 601     if (full)
 602         TRACE("FLAGS: sampleres=%s overrng=%s pause=%s resume=%s syncstart=%s batch=%s block=%s double=%s "
 603               "halfd=%s joint=%s\n",
 604               X(snd_pcm_hw_params_can_mmap_sample_resolution(hw_params)),
 605               X(snd_pcm_hw_params_can_overrange(hw_params)),
 606               X(snd_pcm_hw_params_can_pause(hw_params)),
 607               X(snd_pcm_hw_params_can_resume(hw_params)),
 608               X(snd_pcm_hw_params_can_sync_start(hw_params)),
 609               X(snd_pcm_hw_params_is_batch(hw_params)),
 610               X(snd_pcm_hw_params_is_block_transfer(hw_params)),
 611               X(snd_pcm_hw_params_is_double(hw_params)),
 612               X(snd_pcm_hw_params_is_half_duplex(hw_params)),
 613               X(snd_pcm_hw_params_is_joint_duplex(hw_params)));
 614 #undef X
 615
 616     err = snd_pcm_hw_params_get_access(hw_params, &access);
 617     if (err >= 0)
 618     {
 619         TRACE("access=%s\n", snd_pcm_access_name(access));
 620     }
 621     else
 622     {
 623         snd_pcm_access_mask_t * acmask;
 624
 625         acmask = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_access_mask_sizeof());
 626         snd_pcm_hw_params_get_access_mask(hw_params, acmask);
 627         for ( access = SND_PCM_ACCESS_MMAP_INTERLEAVED; access <= SND_PCM_ACCESS_LAST; access++)
 628             if (snd_pcm_access_mask_test(acmask, access))
 629                 TRACE("access=%s\n", snd_pcm_access_name(access));
 630         HeapFree( GetProcessHeap(), 0, acmask );
 631     }
 632
 633     err = snd_pcm_hw_params_get_format(hw_params, &format);
 634     if (err >= 0)
 635     {
 636         TRACE("format=%s\n", snd_pcm_format_name(format));
 637
 638     }
 639     else
 640     {
 641         snd_pcm_format_mask_t *     fmask;
 642
 643         fmask = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_format_mask_sizeof());
 644         snd_pcm_hw_params_get_format_mask(hw_params, fmask);
 645         for ( format = SND_PCM_FORMAT_S8; format <= SND_PCM_FORMAT_LAST ; format++)
 646             if ( snd_pcm_format_mask_test(fmask, format) )
 647                 TRACE("format=%s\n", snd_pcm_format_name(format));
 648         HeapFree( GetProcessHeap(), 0, fmask );
 649     }
 650
 651     do {
 652       int err=0;
 653       unsigned int val=0;
 654       err = snd_pcm_hw_params_get_channels(hw_params, &val);
 655       if (err<0) {
 656         unsigned int min = 0;
 657         unsigned int max = 0;
 658         err = snd_pcm_hw_params_get_channels_min(hw_params, &min),
 659         err = snd_pcm_hw_params_get_channels_max(hw_params, &max);
 660         TRACE("channels_min=%u, channels_min_max=%u\n", min, max);
 661       } else {
 662         TRACE("channels=%d\n", val);
 663       }
 664     } while(0);
 665     do {
 666       int err=0;
 667       snd_pcm_uframes_t val=0;
 668       err = snd_pcm_hw_params_get_buffer_size(hw_params, &val);
 669       if (err<0) {
 670         snd_pcm_uframes_t min = 0;
 671         snd_pcm_uframes_t max = 0;
 672         err = snd_pcm_hw_params_get_buffer_size_min(hw_params, &min),
 673         err = snd_pcm_hw_params_get_buffer_size_max(hw_params, &max);
 674         TRACE("buffer_size_min=%lu, buffer_size_min_max=%lu\n", min, max);
 675       } else {
 676         TRACE("buffer_size=%lu\n", val);
 677       }
 678     } while(0);
 679
 680 #define X(x) do { \
 681 int err=0; \
 682 int dir=0; \
 683 unsigned int val=0; \
 684 err = snd_pcm_hw_params_get_##x(hw_params,&val, &dir); \
 685 if (err<0) { \
 686   unsigned int min = 0; \
 687   unsigned int max = 0; \
 688   err = snd_pcm_hw_params_get_##x##_min(hw_params, &min, &dir); \
 689   err = snd_pcm_hw_params_get_##x##_max(hw_params, &max, &dir); \
 690   TRACE(#x "_min=%u " #x "_max=%u\n", min, max); \
 691 } else \
 692     TRACE(#x "=%d\n", val); \
 693 } while(0)
 694
 695     X(rate);
 696     X(buffer_time);
 697     X(periods);
 698     do {
 699       int err=0;
 700       int dir=0;
 701       snd_pcm_uframes_t val=0;
 702       err = snd_pcm_hw_params_get_period_size(hw_params, &val, &dir);
 703       if (err<0) {
 704         snd_pcm_uframes_t min = 0;
 705         snd_pcm_uframes_t max = 0;
 706         err = snd_pcm_hw_params_get_period_size_min(hw_params, &min, &dir),
 707         err = snd_pcm_hw_params_get_period_size_max(hw_params, &max, &dir);
 708         TRACE("period_size_min=%lu, period_size_min_max=%lu\n", min, max);
 709       } else {
 710         TRACE("period_size=%lu\n", val);
 711       }
 712     } while(0);
 713
 714     X(period_time);
 715 #undef X
 716
 717     if (!sw)
 718         return;
 719 }
 720
 721 #endif
 722
 723 /**************************************************************************
 724  *                              DriverProc (WINEALSA.@)
 725  */
 726 LRESULT CALLBACK ALSA_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
 727                                  LPARAM dwParam1, LPARAM dwParam2)
 728 {
 729 /* EPP     TRACE("(%08lX, %04X, %08lX, %08lX, %08lX)\n",  */
 730 /* EPP    dwDevID, hDriv, wMsg, dwParam1, dwParam2); */
 731
 732     switch(wMsg) {
 733 #ifdef HAVE_ALSA
 734     case DRV_LOAD:              ALSA_WaveInit();
 735                                 ALSA_MidiInit();
 736                                 return 1;
 737     case DRV_FREE:              return 1;
 738     case DRV_OPEN:              return 1;
 739     case DRV_CLOSE:             return 1;
 740     case DRV_ENABLE:            return 1;
 741     case DRV_DISABLE:           return 1;
 742     case DRV_QUERYCONFIGURE:    return 1;
 743     case DRV_CONFIGURE:         MessageBoxA(0, "ALSA MultiMedia Driver !", "ALSA Driver", MB_OK);       return 1;
 744     case DRV_INSTALL:           return DRVCNF_RESTART;
 745     case DRV_REMOVE:            return DRVCNF_RESTART;
 746 #endif
 747     default:
 748         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 749     }
 750 }