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 #define MSG_TO_STR(x) case x: return #x
 224     switch(msg) {
 225     MSG_TO_STR(WINE_WM_PAUSING);
 226     MSG_TO_STR(WINE_WM_RESTARTING);
 227     MSG_TO_STR(WINE_WM_RESETTING);
 228     MSG_TO_STR(WINE_WM_HEADER);
 229     MSG_TO_STR(WINE_WM_UPDATE);
 230     MSG_TO_STR(WINE_WM_BREAKLOOP);
 231     MSG_TO_STR(WINE_WM_CLOSING);
 232     MSG_TO_STR(WINE_WM_STARTING);
 233     MSG_TO_STR(WINE_WM_STOPPING);
 234     }
 235 #undef MSG_TO_STR
 236     return wine_dbg_sprintf("UNKNOWN(0x%08x)", msg);
 237 }
 238
 239 const char * ALSA_getMessage(UINT msg)
 240 {
 241 #define MSG_TO_STR(x) case x: return #x
 242     switch(msg) {
 243     MSG_TO_STR(DRVM_INIT);
 244     MSG_TO_STR(DRVM_EXIT);
 245     MSG_TO_STR(DRVM_ENABLE);
 246     MSG_TO_STR(DRVM_DISABLE);
 247     MSG_TO_STR(WIDM_OPEN);
 248     MSG_TO_STR(WIDM_CLOSE);
 249     MSG_TO_STR(WIDM_ADDBUFFER);
 250     MSG_TO_STR(WIDM_PREPARE);
 251     MSG_TO_STR(WIDM_UNPREPARE);
 252     MSG_TO_STR(WIDM_GETDEVCAPS);
 253     MSG_TO_STR(WIDM_GETNUMDEVS);
 254     MSG_TO_STR(WIDM_GETPOS);
 255     MSG_TO_STR(WIDM_RESET);
 256     MSG_TO_STR(WIDM_START);
 257     MSG_TO_STR(WIDM_STOP);
 258     MSG_TO_STR(WODM_OPEN);
 259     MSG_TO_STR(WODM_CLOSE);
 260     MSG_TO_STR(WODM_WRITE);
 261     MSG_TO_STR(WODM_PAUSE);
 262     MSG_TO_STR(WODM_GETPOS);
 263     MSG_TO_STR(WODM_BREAKLOOP);
 264     MSG_TO_STR(WODM_PREPARE);
 265     MSG_TO_STR(WODM_UNPREPARE);
 266     MSG_TO_STR(WODM_GETDEVCAPS);
 267     MSG_TO_STR(WODM_GETNUMDEVS);
 268     MSG_TO_STR(WODM_GETPITCH);
 269     MSG_TO_STR(WODM_SETPITCH);
 270     MSG_TO_STR(WODM_GETPLAYBACKRATE);
 271     MSG_TO_STR(WODM_SETPLAYBACKRATE);
 272     MSG_TO_STR(WODM_GETVOLUME);
 273     MSG_TO_STR(WODM_SETVOLUME);
 274     MSG_TO_STR(WODM_RESTART);
 275     MSG_TO_STR(WODM_RESET);
 276     MSG_TO_STR(DRV_QUERYDEVICEINTERFACESIZE);
 277     MSG_TO_STR(DRV_QUERYDEVICEINTERFACE);
 278     MSG_TO_STR(DRV_QUERYDSOUNDIFACE);
 279     MSG_TO_STR(DRV_QUERYDSOUNDDESC);
 280     }
 281 #undef MSG_TO_STR
 282     return wine_dbg_sprintf("UNKNOWN(0x%04x)", msg);
 283 }
 284
 285 const char * ALSA_getFormat(WORD wFormatTag)
 286 {
 287 #define FMT_TO_STR(x) case x: return #x
 288     switch(wFormatTag) {
 289     FMT_TO_STR(WAVE_FORMAT_PCM);
 290     FMT_TO_STR(WAVE_FORMAT_EXTENSIBLE);
 291     FMT_TO_STR(WAVE_FORMAT_MULAW);
 292     FMT_TO_STR(WAVE_FORMAT_ALAW);
 293     FMT_TO_STR(WAVE_FORMAT_ADPCM);
 294     }
 295 #undef FMT_TO_STR
 296     return wine_dbg_sprintf("UNKNOWN(0x%04x)", wFormatTag);
 297 }
 298
 299 /* Allow 1% deviation for sample rates (some ES137x cards) */
 300 BOOL ALSA_NearMatch(int rate1, int rate2)
 301 {
 302     return (((100 * (rate1 - rate2)) / rate1) == 0);
 303 }
 304
 305 DWORD ALSA_bytes_to_mmtime(LPMMTIME lpTime, DWORD position, WAVEFORMATPCMEX* format)
 306 {
 307     TRACE("wType=%04X wBitsPerSample=%u nSamplesPerSec=%u nChannels=%u nAvgBytesPerSec=%u\n",
 308           lpTime->wType, format->Format.wBitsPerSample, format->Format.nSamplesPerSec,
 309           format->Format.nChannels, format->Format.nAvgBytesPerSec);
 310     TRACE("Position in bytes=%u\n", position);
 311
 312     switch (lpTime->wType) {
 313     case TIME_SAMPLES:
 314         lpTime->u.sample = position / (format->Format.wBitsPerSample / 8 * format->Format.nChannels);
 315         TRACE("TIME_SAMPLES=%u\n", lpTime->u.sample);
 316         break;
 317     case TIME_MS:
 318         lpTime->u.ms = 1000.0 * position / (format->Format.wBitsPerSample / 8 * format->Format.nChannels * format->Format.nSamplesPerSec);
 319         TRACE("TIME_MS=%u\n", lpTime->u.ms);
 320         break;
 321     case TIME_SMPTE:
 322         lpTime->u.smpte.fps = 30;
 323         position = position / (format->Format.wBitsPerSample / 8 * format->Format.nChannels);
 324         position += (format->Format.nSamplesPerSec / lpTime->u.smpte.fps) - 1; /* round up */
 325         lpTime->u.smpte.sec = position / format->Format.nSamplesPerSec;
 326         position -= lpTime->u.smpte.sec * format->Format.nSamplesPerSec;
 327         lpTime->u.smpte.min = lpTime->u.smpte.sec / 60;
 328         lpTime->u.smpte.sec -= 60 * lpTime->u.smpte.min;
 329         lpTime->u.smpte.hour = lpTime->u.smpte.min / 60;
 330         lpTime->u.smpte.min -= 60 * lpTime->u.smpte.hour;
 331         lpTime->u.smpte.fps = 30;
 332         lpTime->u.smpte.frame = position * lpTime->u.smpte.fps / format->Format.nSamplesPerSec;
 333         TRACE("TIME_SMPTE=%02u:%02u:%02u:%02u\n",
 334               lpTime->u.smpte.hour, lpTime->u.smpte.min,
 335               lpTime->u.smpte.sec, lpTime->u.smpte.frame);
 336         break;
 337     default:
 338         WARN("Format %d not supported, using TIME_BYTES !\n", lpTime->wType);
 339         lpTime->wType = TIME_BYTES;
 340         /* fall through */
 341     case TIME_BYTES:
 342         lpTime->u.cb = position;
 343         TRACE("TIME_BYTES=%u\n", lpTime->u.cb);
 344         break;
 345     }
 346     return MMSYSERR_NOERROR;
 347 }
 348
 349 void ALSA_copyFormat(LPWAVEFORMATEX wf1, LPWAVEFORMATPCMEX wf2)
 350 {
 351     unsigned int iLength;
 352
 353     ZeroMemory(wf2, sizeof(wf2));
 354     if (wf1->wFormatTag == WAVE_FORMAT_PCM)
 355         iLength = sizeof(PCMWAVEFORMAT);
 356     else if (wf1->wFormatTag == WAVE_FORMAT_EXTENSIBLE)
 357         iLength = sizeof(WAVEFORMATPCMEX);
 358     else
 359         iLength = sizeof(WAVEFORMATEX) + wf1->cbSize;
 360     if (iLength > sizeof(WAVEFORMATPCMEX)) {
 361         ERR("calculated %u bytes, capping\n", iLength);
 362         iLength = sizeof(WAVEFORMATPCMEX);
 363     }
 364     memcpy(wf2, wf1, iLength);
 365 }
 366
 367 BOOL ALSA_supportedFormat(LPWAVEFORMATEX wf)
 368 {
 369     TRACE("(%p)\n",wf);
 370
 371     if (wf->nSamplesPerSec<DSBFREQUENCY_MIN||wf->nSamplesPerSec>DSBFREQUENCY_MAX)
 372         return FALSE;
 373
 374     if (wf->wFormatTag == WAVE_FORMAT_PCM) {
 375         if (wf->nChannels==1||wf->nChannels==2) {
 376             if (wf->wBitsPerSample==8||wf->wBitsPerSample==16)
 377                 return TRUE;
 378         }
 379     } else if (wf->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
 380         WAVEFORMATEXTENSIBLE    * wfex = (WAVEFORMATEXTENSIBLE *)wf;
 381
 382         if (wf->cbSize == 22 &&
 383             (IsEqualGUID(&wfex->SubFormat, &KSDATAFORMAT_SUBTYPE_PCM) ||
 384              IsEqualGUID(&wfex->SubFormat, &KSDATAFORMAT_SUBTYPE_IEEE_FLOAT))) {
 385             if (wf->nChannels>=1 && wf->nChannels<=6) {
 386                 if (wf->wBitsPerSample==wfex->Samples.wValidBitsPerSample) {
 387                     if (wf->wBitsPerSample==8||wf->wBitsPerSample==16||
 388                         wf->wBitsPerSample==24||wf->wBitsPerSample==32) {
 389                         return TRUE;
 390                     }
 391                 } else
 392                     WARN("wBitsPerSample != wValidBitsPerSample not supported yet\n");
 393             }
 394         } else
 395             WARN("only KSDATAFORMAT_SUBTYPE_PCM and KSDATAFORMAT_SUBTYPE_IEEE_FLOAT "
 396                  "supported\n");
 397     } else if (wf->wFormatTag == WAVE_FORMAT_MULAW || wf->wFormatTag == WAVE_FORMAT_ALAW) {
 398         if (wf->wBitsPerSample==8)
 399             return TRUE;
 400         else
 401             ERR("WAVE_FORMAT_MULAW and WAVE_FORMAT_ALAW wBitsPerSample must = 8\n");
 402
 403     } else if (wf->wFormatTag == WAVE_FORMAT_ADPCM) {
 404         if (wf->wBitsPerSample==4)
 405             return TRUE;
 406         else
 407             ERR("WAVE_FORMAT_ADPCM wBitsPerSample must = 4\n");
 408     } else
 409         WARN("only WAVE_FORMAT_PCM and WAVE_FORMAT_EXTENSIBLE supported\n");
 410
 411     return FALSE;
 412 }
 413
 414 /*======================================================================*
 415  *                  Low level WAVE implementation                       *
 416  *======================================================================*/
 417
 418 /**************************************************************************
 419  *                      ALSA_CheckSetVolume             [internal]
 420  *
 421  *  Helper function for Alsa volume queries.  This tries to simplify
 422  * the process of managing the volume.  All parameters are optional
 423  * (pass NULL to ignore or not use).
 424  *  Return values are MMSYSERR_NOERROR on success, or !0 on failure;
 425  * error codes are normalized into the possible documented return
 426  * values from waveOutGetVolume.
 427  */
 428 int ALSA_CheckSetVolume(snd_hctl_t *hctl, int *out_left, int *out_right,
 429             int *out_min, int *out_max, int *out_step,
 430             int *new_left, int *new_right)
 431 {
 432     int rc = MMSYSERR_NOERROR;
 433     int value_count = 0;
 434     snd_hctl_elem_t *           elem = NULL;
 435     snd_ctl_elem_info_t *       eleminfop = NULL;
 436     snd_ctl_elem_value_t *      elemvaluep = NULL;
 437     snd_ctl_elem_id_t *         elemidp = NULL;
 438
 439
 440 #define EXIT_ON_ERROR(f,txt,exitcode) do \
 441 { \
 442     int err; \
 443     if ( (err = (f) ) < 0) \
 444     { \
 445         ERR(txt " failed: %s\n", snd_strerror(err)); \
 446         rc = exitcode; \
 447         goto out; \
 448     } \
 449 } while(0)
 450
 451     if (! hctl)
 452         return MMSYSERR_NOTSUPPORTED;
 453
 454     /* Allocate areas to return information about the volume */
 455     EXIT_ON_ERROR(snd_ctl_elem_id_malloc(&elemidp), "snd_ctl_elem_id_malloc", MMSYSERR_NOMEM);
 456     EXIT_ON_ERROR(snd_ctl_elem_value_malloc (&elemvaluep), "snd_ctl_elem_value_malloc", MMSYSERR_NOMEM);
 457     EXIT_ON_ERROR(snd_ctl_elem_info_malloc (&eleminfop), "snd_ctl_elem_info_malloc", MMSYSERR_NOMEM);
 458     snd_ctl_elem_id_clear(elemidp);
 459     snd_ctl_elem_value_clear(elemvaluep);
 460     snd_ctl_elem_info_clear(eleminfop);
 461
 462     /* Setup and find an element id that exactly matches the characteristic we want
 463     ** FIXME:  It is probably short sighted to hard code and fixate on PCM Playback Volume */
 464     snd_ctl_elem_id_set_name(elemidp, "PCM Playback Volume");
 465     snd_ctl_elem_id_set_interface(elemidp, SND_CTL_ELEM_IFACE_MIXER);
 466     elem = snd_hctl_find_elem(hctl, elemidp);
 467     if (elem)
 468     {
 469         /* Read and return volume information */
 470         EXIT_ON_ERROR(snd_hctl_elem_info(elem, eleminfop), "snd_hctl_elem_info", MMSYSERR_NOTSUPPORTED);
 471         value_count = snd_ctl_elem_info_get_count(eleminfop);
 472         if (out_min || out_max || out_step)
 473         {
 474             if (!snd_ctl_elem_info_is_readable(eleminfop))
 475             {
 476                 ERR("snd_ctl_elem_info_is_readable returned false; cannot return info\n");
 477                 rc = MMSYSERR_NOTSUPPORTED;
 478                 goto out;
 479             }
 480
 481             if (out_min)
 482                 *out_min = snd_ctl_elem_info_get_min(eleminfop);
 483
 484             if (out_max)
 485                 *out_max = snd_ctl_elem_info_get_max(eleminfop);
 486
 487             if (out_step)
 488                 *out_step = snd_ctl_elem_info_get_step(eleminfop);
 489         }
 490
 491         if (out_left || out_right)
 492         {
 493             EXIT_ON_ERROR(snd_hctl_elem_read(elem, elemvaluep), "snd_hctl_elem_read", MMSYSERR_NOTSUPPORTED);
 494
 495             if (out_left)
 496                 *out_left = snd_ctl_elem_value_get_integer(elemvaluep, 0);
 497
 498             if (out_right)
 499             {
 500                 if (value_count == 1)
 501                     *out_right = snd_ctl_elem_value_get_integer(elemvaluep, 0);
 502                 else if (value_count == 2)
 503                     *out_right = snd_ctl_elem_value_get_integer(elemvaluep, 1);
 504                 else
 505                 {
 506                     ERR("Unexpected value count %d from snd_ctl_elem_info_get_count while getting volume info\n", value_count);
 507                     rc = -1;
 508                     goto out;
 509                 }
 510             }
 511         }
 512
 513         /* Set the volume */
 514         if (new_left || new_right)
 515         {
 516             EXIT_ON_ERROR(snd_hctl_elem_read(elem, elemvaluep), "snd_hctl_elem_read", MMSYSERR_NOTSUPPORTED);
 517             if (new_left)
 518                 snd_ctl_elem_value_set_integer(elemvaluep, 0, *new_left);
 519             if (new_right)
 520             {
 521                 if (value_count == 1)
 522                     snd_ctl_elem_value_set_integer(elemvaluep, 0, *new_right);
 523                 else if (value_count == 2)
 524                     snd_ctl_elem_value_set_integer(elemvaluep, 1, *new_right);
 525                 else
 526                 {
 527                     ERR("Unexpected value count %d from snd_ctl_elem_info_get_count while setting volume info\n", value_count);
 528                     rc = -1;
 529                     goto out;
 530                 }
 531             }
 532
 533             EXIT_ON_ERROR(snd_hctl_elem_write(elem, elemvaluep), "snd_hctl_elem_write", MMSYSERR_NOTSUPPORTED);
 534         }
 535     }
 536     else
 537     {
 538         ERR("Could not find 'PCM Playback Volume' element\n");
 539         rc = MMSYSERR_NOTSUPPORTED;
 540     }
 541
 542
 543 #undef EXIT_ON_ERROR
 544
 545 out:
 546
 547     if (elemvaluep)
 548         snd_ctl_elem_value_free(elemvaluep);
 549     if (eleminfop)
 550         snd_ctl_elem_info_free(eleminfop);
 551     if (elemidp)
 552         snd_ctl_elem_id_free(elemidp);
 553
 554     return rc;
 555 }
 556
 557
 558 /**************************************************************************
 559  *                      ALSA_XRUNRecovery               [internal]
 560  *
 561  * used to recovery from XRUN errors (buffer underflow/overflow)
 562  */
 563 int ALSA_XRUNRecovery(WINE_WAVEDEV * wwo, int err)
 564 {
 565     if (err == -EPIPE) {    /* under-run */
 566         err = snd_pcm_prepare(wwo->pcm);
 567         if (err < 0)
 568              ERR( "underrun recovery failed. prepare failed: %s\n", snd_strerror(err));
 569         return 0;
 570     } else if (err == -ESTRPIPE) {
 571         while ((err = snd_pcm_resume(wwo->pcm)) == -EAGAIN)
 572             sleep(1);       /* wait until the suspend flag is released */
 573         if (err < 0) {
 574             err = snd_pcm_prepare(wwo->pcm);
 575             if (err < 0)
 576                 ERR("recovery from suspend failed, prepare failed: %s\n", snd_strerror(err));
 577         }
 578         return 0;
 579     }
 580     return err;
 581 }
 582
 583 /**************************************************************************
 584  *                      ALSA_TraceParameters            [internal]
 585  *
 586  * used to trace format changes, hw and sw parameters
 587  */
 588 void ALSA_TraceParameters(snd_pcm_hw_params_t * hw_params, snd_pcm_sw_params_t * sw, int full)
 589 {
 590     int err;
 591     snd_pcm_format_t   format;
 592     snd_pcm_access_t   access;
 593
 594 #define X(x) ((x)? "true" : "false")
 595     if (full)
 596         TRACE("FLAGS: sampleres=%s overrng=%s pause=%s resume=%s syncstart=%s batch=%s block=%s double=%s "
 597               "halfd=%s joint=%s\n",
 598               X(snd_pcm_hw_params_can_mmap_sample_resolution(hw_params)),
 599               X(snd_pcm_hw_params_can_overrange(hw_params)),
 600               X(snd_pcm_hw_params_can_pause(hw_params)),
 601               X(snd_pcm_hw_params_can_resume(hw_params)),
 602               X(snd_pcm_hw_params_can_sync_start(hw_params)),
 603               X(snd_pcm_hw_params_is_batch(hw_params)),
 604               X(snd_pcm_hw_params_is_block_transfer(hw_params)),
 605               X(snd_pcm_hw_params_is_double(hw_params)),
 606               X(snd_pcm_hw_params_is_half_duplex(hw_params)),
 607               X(snd_pcm_hw_params_is_joint_duplex(hw_params)));
 608 #undef X
 609
 610     err = snd_pcm_hw_params_get_access(hw_params, &access);
 611     if (err >= 0)
 612     {
 613         TRACE("access=%s\n", snd_pcm_access_name(access));
 614     }
 615     else
 616     {
 617         snd_pcm_access_mask_t * acmask;
 618
 619         acmask = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_access_mask_sizeof());
 620         snd_pcm_hw_params_get_access_mask(hw_params, acmask);
 621         for ( access = SND_PCM_ACCESS_MMAP_INTERLEAVED; access <= SND_PCM_ACCESS_LAST; access++)
 622             if (snd_pcm_access_mask_test(acmask, access))
 623                 TRACE("access=%s\n", snd_pcm_access_name(access));
 624         HeapFree( GetProcessHeap(), 0, acmask );
 625     }
 626
 627     err = snd_pcm_hw_params_get_format(hw_params, &format);
 628     if (err >= 0)
 629     {
 630         TRACE("format=%s\n", snd_pcm_format_name(format));
 631
 632     }
 633     else
 634     {
 635         snd_pcm_format_mask_t *     fmask;
 636
 637         fmask = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_format_mask_sizeof());
 638         snd_pcm_hw_params_get_format_mask(hw_params, fmask);
 639         for ( format = SND_PCM_FORMAT_S8; format <= SND_PCM_FORMAT_LAST ; format++)
 640             if ( snd_pcm_format_mask_test(fmask, format) )
 641                 TRACE("format=%s\n", snd_pcm_format_name(format));
 642         HeapFree( GetProcessHeap(), 0, fmask );
 643     }
 644
 645     do {
 646       int err=0;
 647       unsigned int val=0;
 648       err = snd_pcm_hw_params_get_channels(hw_params, &val);
 649       if (err<0) {
 650         unsigned int min = 0;
 651         unsigned int max = 0;
 652         err = snd_pcm_hw_params_get_channels_min(hw_params, &min),
 653         err = snd_pcm_hw_params_get_channels_max(hw_params, &max);
 654         TRACE("channels_min=%u, channels_min_max=%u\n", min, max);
 655       } else {
 656         TRACE("channels=%d\n", val);
 657       }
 658     } while(0);
 659     do {
 660       int err=0;
 661       snd_pcm_uframes_t val=0;
 662       err = snd_pcm_hw_params_get_buffer_size(hw_params, &val);
 663       if (err<0) {
 664         snd_pcm_uframes_t min = 0;
 665         snd_pcm_uframes_t max = 0;
 666         err = snd_pcm_hw_params_get_buffer_size_min(hw_params, &min),
 667         err = snd_pcm_hw_params_get_buffer_size_max(hw_params, &max);
 668         TRACE("buffer_size_min=%lu, buffer_size_min_max=%lu\n", min, max);
 669       } else {
 670         TRACE("buffer_size=%lu\n", val);
 671       }
 672     } while(0);
 673
 674 #define X(x) do { \
 675 int err=0; \
 676 int dir=0; \
 677 unsigned int val=0; \
 678 err = snd_pcm_hw_params_get_##x(hw_params,&val, &dir); \
 679 if (err<0) { \
 680   unsigned int min = 0; \
 681   unsigned int max = 0; \
 682   err = snd_pcm_hw_params_get_##x##_min(hw_params, &min, &dir); \
 683   err = snd_pcm_hw_params_get_##x##_max(hw_params, &max, &dir); \
 684   TRACE(#x "_min=%u " #x "_max=%u\n", min, max); \
 685 } else \
 686     TRACE(#x "=%d\n", val); \
 687 } while(0)
 688
 689     X(rate);
 690     X(buffer_time);
 691     X(periods);
 692     do {
 693       int err=0;
 694       int dir=0;
 695       snd_pcm_uframes_t val=0;
 696       err = snd_pcm_hw_params_get_period_size(hw_params, &val, &dir);
 697       if (err<0) {
 698         snd_pcm_uframes_t min = 0;
 699         snd_pcm_uframes_t max = 0;
 700         err = snd_pcm_hw_params_get_period_size_min(hw_params, &min, &dir),
 701         err = snd_pcm_hw_params_get_period_size_max(hw_params, &max, &dir);
 702         TRACE("period_size_min=%lu, period_size_min_max=%lu\n", min, max);
 703       } else {
 704         TRACE("period_size=%lu\n", val);
 705       }
 706     } while(0);
 707
 708     X(period_time);
 709 #undef X
 710
 711     if (!sw)
 712         return;
 713 }
 714
 715 #endif
 716
 717 /**************************************************************************
 718  *                              DriverProc (WINEALSA.@)
 719  */
 720 LRESULT CALLBACK ALSA_DriverProc(DWORD_PTR dwDevID, HDRVR hDriv, UINT wMsg,
 721                                  LPARAM dwParam1, LPARAM dwParam2)
 722 {
 723 /* EPP     TRACE("(%08lX, %04X, %08lX, %08lX, %08lX)\n",  */
 724 /* EPP    dwDevID, hDriv, wMsg, dwParam1, dwParam2); */
 725
 726     switch(wMsg) {
 727 #ifdef HAVE_ALSA
 728     case DRV_LOAD:              ALSA_WaveInit();
 729                                 ALSA_MidiInit();
 730                                 return 1;
 731     case DRV_FREE:              return 1;
 732     case DRV_OPEN:              return 1;
 733     case DRV_CLOSE:             return 1;
 734     case DRV_ENABLE:            return 1;
 735     case DRV_DISABLE:           return 1;
 736     case DRV_QUERYCONFIGURE:    return 1;
 737     case DRV_CONFIGURE:         MessageBoxA(0, "ALSA MultiMedia Driver !", "ALSA Driver", MB_OK);       return 1;
 738     case DRV_INSTALL:           return DRVCNF_RESTART;
 739     case DRV_REMOVE:            return DRVCNF_RESTART;
 740 #endif
 741     default:
 742         return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
 743     }
 744 }