git.oblomov.eu Git - wine/blob - dlls/avifil32/acmstream.c

   1 /*
   2  * Copyright 2002 Michael Günnewig
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #define COM_NO_WINDOWS_H
  20 #include <assert.h>
  21 #include <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "wingdi.h"
  26 #include "winuser.h"
  27 #include "winnls.h"
  28 #include "winerror.h"
  29 #include "windowsx.h"
  30 #include "mmsystem.h"
  31 #include "vfw.h"
  32 #include "msacm.h"
  33
  34 #include "avifile_private.h"
  35
  36 #include "wine/debug.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(avifile);
  39
  40 /***********************************************************************/
  41
  42 static HRESULT WINAPI ACMStream_fnQueryInterface(IAVIStream*iface,REFIID refiid,LPVOID *obj);
  43 static ULONG   WINAPI ACMStream_fnAddRef(IAVIStream*iface);
  44 static ULONG   WINAPI ACMStream_fnRelease(IAVIStream* iface);
  45 static HRESULT WINAPI ACMStream_fnCreate(IAVIStream*iface,LPARAM lParam1,LPARAM lParam2);
  46 static HRESULT WINAPI ACMStream_fnInfo(IAVIStream*iface,AVISTREAMINFOW *psi,LONG size);
  47 static LONG    WINAPI ACMStream_fnFindSample(IAVIStream*iface,LONG pos,LONG flags);
  48 static HRESULT WINAPI ACMStream_fnReadFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG *formatsize);
  49 static HRESULT WINAPI ACMStream_fnSetFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG formatsize);
  50 static HRESULT WINAPI ACMStream_fnRead(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,LONG *bytesread,LONG *samplesread);
  51 static HRESULT WINAPI ACMStream_fnWrite(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,DWORD flags,LONG *sampwritten,LONG *byteswritten);
  52 static HRESULT WINAPI ACMStream_fnDelete(IAVIStream*iface,LONG start,LONG samples);
  53 static HRESULT WINAPI ACMStream_fnReadData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG *lpread);
  54 static HRESULT WINAPI ACMStream_fnWriteData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG size);
  55 static HRESULT WINAPI ACMStream_fnSetInfo(IAVIStream*iface,AVISTREAMINFOW*info,LONG infolen);
  56
  57 static const struct IAVIStreamVtbl iacmst = {
  58   ACMStream_fnQueryInterface,
  59   ACMStream_fnAddRef,
  60   ACMStream_fnRelease,
  61   ACMStream_fnCreate,
  62   ACMStream_fnInfo,
  63   ACMStream_fnFindSample,
  64   ACMStream_fnReadFormat,
  65   ACMStream_fnSetFormat,
  66   ACMStream_fnRead,
  67   ACMStream_fnWrite,
  68   ACMStream_fnDelete,
  69   ACMStream_fnReadData,
  70   ACMStream_fnWriteData,
  71   ACMStream_fnSetInfo
  72 };
  73
  74 typedef struct _IAVIStreamImpl {
  75   /* IUnknown stuff */
  76   const IAVIStreamVtbl *lpVtbl;
  77   LONG            ref;
  78
  79   /* IAVIStream stuff */
  80   PAVISTREAM      pStream;
  81   AVISTREAMINFOW  sInfo;
  82
  83   HACMSTREAM      has;
  84
  85   LPWAVEFORMATEX  lpInFormat;
  86   LONG            cbInFormat;
  87
  88   LPWAVEFORMATEX  lpOutFormat;
  89   LONG            cbOutFormat;
  90
  91   ACMSTREAMHEADER acmStreamHdr;
  92 } IAVIStreamImpl;
  93
  94 /***********************************************************************/
  95
  96 #define CONVERT_STREAM_to_THIS(a) do { \
  97            DWORD __bytes; \
  98            acmStreamSize(This->has,*(a) * This->lpInFormat->nBlockAlign,\
  99                          &__bytes, ACM_STREAMSIZEF_SOURCE); \
 100            *(a) = __bytes / This->lpOutFormat->nBlockAlign; } while(0)
 101
 102 #define CONVERT_THIS_to_STREAM(a) do { \
 103            DWORD __bytes; \
 104            acmStreamSize(This->has,*(a) * This->lpOutFormat->nBlockAlign,\
 105                          &__bytes, ACM_STREAMSIZEF_DESTINATION); \
 106            *(a) = __bytes / This->lpInFormat->nBlockAlign; } while(0)
 107
 108 static HRESULT AVIFILE_OpenCompressor(IAVIStreamImpl *This);
 109
 110 HRESULT AVIFILE_CreateACMStream(REFIID riid, LPVOID *ppv)
 111 {
 112   IAVIStreamImpl *pstream;
 113   HRESULT         hr;
 114
 115   assert(riid != NULL && ppv != NULL);
 116
 117   *ppv = NULL;
 118
 119   pstream = (IAVIStreamImpl*)LocalAlloc(LPTR, sizeof(IAVIStreamImpl));
 120   if (pstream == NULL)
 121     return AVIERR_MEMORY;
 122
 123   pstream->lpVtbl = &iacmst;
 124
 125   hr = IAVIStream_QueryInterface((IAVIStream*)pstream, riid, ppv);
 126   if (FAILED(hr))
 127     LocalFree((HLOCAL)pstream);
 128
 129   return hr;
 130 }
 131
 132 static HRESULT WINAPI ACMStream_fnQueryInterface(IAVIStream *iface,
 133                                                   REFIID refiid, LPVOID *obj)
 134 {
 135   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 136
 137   TRACE("(%p,%s,%p)\n", iface, debugstr_guid(refiid), obj);
 138
 139   if (IsEqualGUID(&IID_IUnknown, refiid) ||
 140       IsEqualGUID(&IID_IAVIStream, refiid)) {
 141     *obj = This;
 142     IAVIStream_AddRef(iface);
 143
 144     return S_OK;
 145   }
 146
 147   return OLE_E_ENUM_NOMORE;
 148 }
 149
 150 static ULONG WINAPI ACMStream_fnAddRef(IAVIStream *iface)
 151 {
 152   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 153   ULONG ref = InterlockedIncrement(&This->ref);
 154
 155   TRACE("(%p) -> %ld\n", iface, ref);
 156
 157   /* also add reference to the nested stream */
 158   if (This->pStream != NULL)
 159     IAVIStream_AddRef(This->pStream);
 160
 161   return ref;
 162 }
 163
 164 static ULONG WINAPI ACMStream_fnRelease(IAVIStream* iface)
 165 {
 166   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 167   ULONG ref = InterlockedDecrement(&This->ref);
 168
 169   TRACE("(%p) -> %ld\n", iface, ref);
 170
 171   if (ref == 0) {
 172     /* destruct */
 173     if (This->has != NULL) {
 174       if (This->acmStreamHdr.fdwStatus & ACMSTREAMHEADER_STATUSF_PREPARED)
 175         acmStreamUnprepareHeader(This->has, &This->acmStreamHdr, 0);
 176       acmStreamClose(This->has, 0);
 177       This->has = NULL;
 178     }
 179     if (This->acmStreamHdr.pbSrc != NULL) {
 180       GlobalFreePtr(This->acmStreamHdr.pbSrc);
 181       This->acmStreamHdr.pbSrc = NULL;
 182     }
 183     if (This->acmStreamHdr.pbDst != NULL) {
 184       GlobalFreePtr(This->acmStreamHdr.pbDst);
 185       This->acmStreamHdr.pbDst = NULL;
 186     }
 187     if (This->lpInFormat != NULL) {
 188       GlobalFreePtr(This->lpInFormat);
 189       This->lpInFormat = NULL;
 190       This->cbInFormat = 0;
 191     }
 192     if (This->lpOutFormat != NULL) {
 193       GlobalFreePtr(This->lpOutFormat);
 194       This->lpOutFormat = NULL;
 195       This->cbOutFormat = 0;
 196     }
 197     if (This->pStream != NULL) {
 198       IAVIStream_Release(This->pStream);
 199       This->pStream = NULL;
 200     }
 201     LocalFree((HLOCAL)This);
 202
 203     return 0;
 204   }
 205
 206   /* also release reference to the nested stream */
 207   if (This->pStream != NULL)
 208     IAVIStream_Release(This->pStream);
 209
 210   return ref;
 211 }
 212
 213 /* lParam1: PAVISTREAM
 214  * lParam2: LPAVICOMPRESSOPTIONS -- even if doc's say LPWAVEFORMAT
 215  */
 216 static HRESULT WINAPI ACMStream_fnCreate(IAVIStream *iface, LPARAM lParam1,
 217                                           LPARAM lParam2)
 218 {
 219   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 220
 221   TRACE("(%p,0x%08lX,0x%08lX)\n", iface, lParam1, lParam2);
 222
 223   /* check for swapped parameters */
 224   if ((LPVOID)lParam1 != NULL &&
 225       ((LPAVICOMPRESSOPTIONS)lParam1)->fccType == streamtypeAUDIO) {
 226     register LPARAM tmp = lParam1;
 227
 228     lParam1 = lParam2;
 229     lParam2 = tmp;
 230   }
 231
 232   if ((LPVOID)lParam1 == NULL)
 233     return AVIERR_BADPARAM;
 234
 235   IAVIStream_Info((PAVISTREAM)lParam1, &This->sInfo, sizeof(This->sInfo));
 236   if (This->sInfo.fccType != streamtypeAUDIO)
 237     return AVIERR_ERROR; /* error in registry or AVIMakeCompressedStream */
 238
 239   This->sInfo.fccHandler = 0; /* be paranoid */
 240
 241   /* FIXME: check ACM version? Which version does we need? */
 242
 243   if ((LPVOID)lParam2 != NULL) {
 244     /* We only need the format from the compress-options */
 245     if (((LPAVICOMPRESSOPTIONS)lParam2)->fccType == streamtypeAUDIO)
 246       lParam2 = (LPARAM)((LPAVICOMPRESSOPTIONS)lParam2)->lpFormat;
 247
 248     if (((LPWAVEFORMATEX)lParam2)->wFormatTag != WAVE_FORMAT_PCM)
 249       This->cbOutFormat = sizeof(WAVEFORMATEX) + ((LPWAVEFORMATEX)lParam2)->cbSize;
 250     else
 251       This->cbOutFormat = sizeof(PCMWAVEFORMAT);
 252
 253     This->lpOutFormat = (LPWAVEFORMATEX)GlobalAllocPtr(GHND, This->cbOutFormat);
 254     if (This->lpOutFormat == NULL)
 255       return AVIERR_MEMORY;
 256
 257     memcpy(This->lpOutFormat, (LPVOID)lParam2, This->cbOutFormat);
 258   } else {
 259     This->lpOutFormat = NULL;
 260     This->cbOutFormat = 0;
 261   }
 262
 263   This->pStream = (PAVISTREAM)lParam1;
 264   IAVIStream_AddRef(This->pStream);
 265
 266   return AVIERR_OK;
 267 }
 268
 269 static HRESULT WINAPI ACMStream_fnInfo(IAVIStream *iface,LPAVISTREAMINFOW psi,
 270                                         LONG size)
 271 {
 272   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 273
 274   TRACE("(%p,%p,%ld)\n", iface, psi, size);
 275
 276   if (psi == NULL)
 277     return AVIERR_BADPARAM;
 278   if (size < 0)
 279     return AVIERR_BADSIZE;
 280
 281   /* Need codec to correct some values in structure */
 282   if (This->has == NULL) {
 283     HRESULT hr = AVIFILE_OpenCompressor(This);
 284
 285     if (FAILED(hr))
 286       return hr;
 287   }
 288
 289   memcpy(psi, &This->sInfo, min(size, (LONG)sizeof(This->sInfo)));
 290
 291   if (size < (LONG)sizeof(This->sInfo))
 292     return AVIERR_BUFFERTOOSMALL;
 293   return AVIERR_OK;
 294 }
 295
 296 static LONG WINAPI ACMStream_fnFindSample(IAVIStream *iface, LONG pos,
 297                                            LONG flags)
 298 {
 299   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 300
 301   TRACE("(%p,%ld,0x%08lX)\n",iface,pos,flags);
 302
 303   if (flags & FIND_FROM_START) {
 304     pos = This->sInfo.dwStart;
 305     flags &= ~(FIND_FROM_START|FIND_PREV);
 306     flags |= FIND_NEXT;
 307   }
 308
 309   /* convert pos from our 'space' to This->pStream's one */
 310   CONVERT_THIS_to_STREAM(&pos);
 311
 312   /* ask stream */
 313   pos = IAVIStream_FindSample(This->pStream, pos, flags);
 314
 315   if (pos != -1) {
 316     /* convert pos back to our 'space' if it's no size or physical pos */
 317     if ((flags & FIND_RET) == 0)
 318       CONVERT_STREAM_to_THIS(&pos);
 319   }
 320
 321   return pos;
 322 }
 323
 324 static HRESULT WINAPI ACMStream_fnReadFormat(IAVIStream *iface, LONG pos,
 325                                               LPVOID format, LONG *formatsize)
 326 {
 327   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 328
 329   TRACE("(%p,%ld,%p,%p)\n", iface, pos, format, formatsize);
 330
 331   if (formatsize == NULL)
 332     return AVIERR_BADPARAM;
 333
 334   if (This->has == NULL) {
 335     HRESULT hr = AVIFILE_OpenCompressor(This);
 336
 337     if (FAILED(hr))
 338       return hr;
 339   }
 340
 341   /* only interested in needed buffersize? */
 342   if (format == NULL || *formatsize <= 0) {
 343     *formatsize = This->cbOutFormat;
 344
 345     return AVIERR_OK;
 346   }
 347
 348   /* copy initial format (only as much as will fit) */
 349   memcpy(format, This->lpOutFormat, min(*formatsize, This->cbOutFormat));
 350   if (*formatsize < This->cbOutFormat) {
 351     *formatsize = This->cbOutFormat;
 352     return AVIERR_BUFFERTOOSMALL;
 353   }
 354
 355   *formatsize = This->cbOutFormat;
 356   return AVIERR_OK;
 357 }
 358
 359 static HRESULT WINAPI ACMStream_fnSetFormat(IAVIStream *iface, LONG pos,
 360                                              LPVOID format, LONG formatsize)
 361 {
 362   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 363
 364   HRESULT hr;
 365
 366   TRACE("(%p,%ld,%p,%ld)\n", iface, pos, format, formatsize);
 367
 368   /* check parameters */
 369   if (format == NULL || formatsize <= 0)
 370     return AVIERR_BADPARAM;
 371
 372   /* Input format already known?
 373    * Changing is unsupported, but be quiet if it's the same */
 374   if (This->lpInFormat != NULL) {
 375     if (This->cbInFormat != formatsize ||
 376         memcmp(format, This->lpInFormat, formatsize) != 0)
 377       return AVIERR_UNSUPPORTED;
 378
 379     return AVIERR_OK;
 380   }
 381
 382   /* Does the nested stream support writing? */
 383   if ((This->sInfo.dwCaps & AVIFILECAPS_CANWRITE) == 0)
 384     return AVIERR_READONLY;
 385
 386   This->lpInFormat = (LPWAVEFORMATEX)GlobalAllocPtr(GMEM_MOVEABLE, formatsize);
 387   if (This->lpInFormat == NULL)
 388     return AVIERR_MEMORY;
 389   This->cbInFormat = formatsize;
 390   memcpy(This->lpInFormat, format, formatsize);
 391
 392   /* initialize formats and get compressor */
 393   hr = AVIFILE_OpenCompressor(This);
 394   if (FAILED(hr))
 395     return hr;
 396
 397   CONVERT_THIS_to_STREAM(&pos);
 398
 399   /* tell the nested stream the new format */
 400   return IAVIStream_SetFormat(This->pStream, pos, This->lpOutFormat,
 401                               This->cbOutFormat);
 402 }
 403
 404 static HRESULT WINAPI ACMStream_fnRead(IAVIStream *iface, LONG start,
 405                                         LONG samples, LPVOID buffer,
 406                                         LONG buffersize, LPLONG bytesread,
 407                                         LPLONG samplesread)
 408 {
 409   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 410
 411   HRESULT hr;
 412   DWORD   size;
 413
 414   TRACE("(%p,%ld,%ld,%p,%ld,%p,%p)\n", iface, start, samples, buffer,
 415         buffersize, bytesread, samplesread);
 416
 417   /* clear return parameters if given */
 418   if (bytesread != NULL)
 419     *bytesread = 0;
 420   if (samplesread != NULL)
 421     *samplesread = 0;
 422
 423   /* Do we have our compressor? */
 424   if (This->has == NULL) {
 425     hr = AVIFILE_OpenCompressor(This);
 426
 427     if (FAILED(hr))
 428       return hr;
 429   }
 430
 431   /* only need to pass through? */
 432   if (This->cbInFormat == This->cbOutFormat &&
 433       memcmp(This->lpInFormat, This->lpOutFormat, This->cbInFormat) == 0) {
 434     return IAVIStream_Read(This->pStream, start, samples, buffer, buffersize,
 435                            bytesread, samplesread);
 436   }
 437
 438   /* read as much as fit? */
 439   if (samples == -1)
 440     samples = buffersize / This->lpOutFormat->nBlockAlign;
 441   /* limit to buffersize */
 442   if (samples * This->lpOutFormat->nBlockAlign > buffersize)
 443     samples = buffersize / This->lpOutFormat->nBlockAlign;
 444
 445   /* only return needed size? */
 446   if (buffer == NULL || buffersize <= 0 || samples == 0) {
 447     if (bytesread == NULL && samplesread == NULL)
 448       return AVIERR_BADPARAM;
 449
 450     if (bytesread != NULL)
 451       *bytesread = samples * This->lpOutFormat->nBlockAlign;
 452     if (samplesread != NULL)
 453       *samplesread = samples;
 454
 455     return AVIERR_OK;
 456   }
 457
 458   /* map our positions to pStream positions */
 459   CONVERT_THIS_to_STREAM(&start);
 460
 461   /* our needed internal buffersize */
 462   size = samples * This->lpInFormat->nBlockAlign;
 463
 464   /* Need to free destination buffer used for writing? */
 465   if (This->acmStreamHdr.pbDst != NULL) {
 466     GlobalFreePtr(This->acmStreamHdr.pbDst);
 467     This->acmStreamHdr.pbDst     = NULL;
 468     This->acmStreamHdr.dwDstUser = 0;
 469   }
 470
 471   /* need bigger source buffer? */
 472   if (This->acmStreamHdr.pbSrc == NULL ||
 473       This->acmStreamHdr.dwSrcUser < size) {
 474     if (This->acmStreamHdr.pbSrc == NULL)
 475       This->acmStreamHdr.pbSrc = GlobalAllocPtr(GMEM_MOVEABLE, size);
 476     else
 477       This->acmStreamHdr.pbSrc = GlobalReAllocPtr(This->acmStreamHdr.pbSrc,
 478                                                   size, GMEM_MOVEABLE);
 479     if (This->acmStreamHdr.pbSrc == NULL)
 480       return AVIERR_MEMORY;
 481     This->acmStreamHdr.dwSrcUser = size;
 482   }
 483
 484   This->acmStreamHdr.cbStruct = sizeof(This->acmStreamHdr);
 485   This->acmStreamHdr.cbSrcLengthUsed = 0;
 486   This->acmStreamHdr.cbDstLengthUsed = 0;
 487   This->acmStreamHdr.cbSrcLength     = size;
 488
 489   /* read source data */
 490   hr = IAVIStream_Read(This->pStream, start, -1, This->acmStreamHdr.pbSrc,
 491                        This->acmStreamHdr.cbSrcLength,
 492                        (LONG *)&This->acmStreamHdr.cbSrcLength, NULL);
 493   if (FAILED(hr) || This->acmStreamHdr.cbSrcLength == 0)
 494     return hr;
 495
 496   /* need to prepare stream? */
 497   This->acmStreamHdr.pbDst       = buffer;
 498   This->acmStreamHdr.cbDstLength = buffersize;
 499   if ((This->acmStreamHdr.fdwStatus & ACMSTREAMHEADER_STATUSF_PREPARED) == 0) {
 500     if (acmStreamPrepareHeader(This->has, &This->acmStreamHdr, 0) != S_OK) {
 501       This->acmStreamHdr.pbDst       = NULL;
 502       This->acmStreamHdr.cbDstLength = 0;
 503       return AVIERR_COMPRESSOR;
 504     }
 505   }
 506
 507   /* now do the conversion */
 508   /* FIXME: use ACM_CONVERTF_* flags */
 509   if (acmStreamConvert(This->has, &This->acmStreamHdr, 0) != S_OK)
 510     hr = AVIERR_COMPRESSOR;
 511
 512   This->acmStreamHdr.pbDst       = NULL;
 513   This->acmStreamHdr.cbDstLength = 0;
 514
 515   /* fill out return parameters if given */
 516   if (bytesread != NULL)
 517     *bytesread = This->acmStreamHdr.cbDstLengthUsed;
 518   if (samplesread != NULL)
 519     *samplesread =
 520       This->acmStreamHdr.cbDstLengthUsed / This->lpOutFormat->nBlockAlign;
 521
 522   return hr;
 523 }
 524
 525 static HRESULT WINAPI ACMStream_fnWrite(IAVIStream *iface, LONG start,
 526                                          LONG samples, LPVOID buffer,
 527                                          LONG buffersize, DWORD flags,
 528                                          LPLONG sampwritten,
 529                                          LPLONG byteswritten)
 530 {
 531   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 532
 533   HRESULT hr;
 534   ULONG   size;
 535
 536   TRACE("(%p,%ld,%ld,%p,%ld,0x%08lX,%p,%p)\n", iface, start, samples,
 537         buffer, buffersize, flags, sampwritten, byteswritten);
 538
 539   /* clear return parameters if given */
 540   if (sampwritten != NULL)
 541     *sampwritten = 0;
 542   if (byteswritten != NULL)
 543     *byteswritten = 0;
 544
 545   /* check parameters */
 546   if (buffer == NULL && (buffersize > 0 || samples > 0))
 547     return AVIERR_BADPARAM;
 548
 549   /* Have we write capability? */
 550   if ((This->sInfo.dwCaps & AVIFILECAPS_CANWRITE) == 0)
 551     return AVIERR_READONLY;
 552
 553   /* also need a compressor */
 554   if (This->has == NULL)
 555     return AVIERR_NOCOMPRESSOR;
 556
 557   /* map our sizes to pStream sizes */
 558   size = buffersize;
 559   CONVERT_THIS_to_STREAM(&size);
 560   CONVERT_THIS_to_STREAM(&start);
 561
 562   /* no bytes to write? -- short circuit */
 563   if (size == 0) {
 564     return IAVIStream_Write(This->pStream, -1, samples, buffer, size,
 565                             flags, sampwritten, byteswritten);
 566   }
 567
 568   /* Need to free source buffer used for reading? */
 569   if (This->acmStreamHdr.pbSrc != NULL) {
 570     GlobalFreePtr(This->acmStreamHdr.pbSrc);
 571     This->acmStreamHdr.pbSrc     = NULL;
 572     This->acmStreamHdr.dwSrcUser = 0;
 573   }
 574
 575   /* Need bigger destination buffer? */
 576   if (This->acmStreamHdr.pbDst == NULL ||
 577       This->acmStreamHdr.dwDstUser < size) {
 578     if (This->acmStreamHdr.pbDst == NULL)
 579       This->acmStreamHdr.pbDst = GlobalAllocPtr(GMEM_MOVEABLE, size);
 580     else
 581       This->acmStreamHdr.pbDst = GlobalReAllocPtr(This->acmStreamHdr.pbDst,
 582                                                   size, GMEM_MOVEABLE);
 583     if (This->acmStreamHdr.pbDst == NULL)
 584       return AVIERR_MEMORY;
 585     This->acmStreamHdr.dwDstUser = size;
 586   }
 587   This->acmStreamHdr.cbStruct        = sizeof(This->acmStreamHdr);
 588   This->acmStreamHdr.cbSrcLengthUsed = 0;
 589   This->acmStreamHdr.cbDstLengthUsed = 0;
 590   This->acmStreamHdr.cbDstLength     = This->acmStreamHdr.dwDstUser;
 591
 592   /* need to prepare stream? */
 593   This->acmStreamHdr.pbSrc       = buffer;
 594   This->acmStreamHdr.cbSrcLength = buffersize;
 595   if ((This->acmStreamHdr.fdwStatus & ACMSTREAMHEADER_STATUSF_PREPARED) == 0) {
 596     if (acmStreamPrepareHeader(This->has, &This->acmStreamHdr, 0) != S_OK) {
 597       This->acmStreamHdr.pbSrc       = NULL;
 598       This->acmStreamHdr.cbSrcLength = 0;
 599       return AVIERR_COMPRESSOR;
 600     }
 601   }
 602
 603   /* now do the conversion */
 604   /* FIXME: use ACM_CONVERTF_* flags */
 605   if (acmStreamConvert(This->has, &This->acmStreamHdr, 0) != S_OK)
 606     hr = AVIERR_COMPRESSOR;
 607   else
 608     hr = AVIERR_OK;
 609
 610   This->acmStreamHdr.pbSrc       = NULL;
 611   This->acmStreamHdr.cbSrcLength = 0;
 612
 613   if (FAILED(hr))
 614     return hr;
 615
 616   return IAVIStream_Write(This->pStream,-1,This->acmStreamHdr.cbDstLengthUsed /
 617                           This->lpOutFormat->nBlockAlign,This->acmStreamHdr.pbDst,
 618                           This->acmStreamHdr.cbDstLengthUsed,flags,sampwritten,
 619                           byteswritten);
 620 }
 621
 622 static HRESULT WINAPI ACMStream_fnDelete(IAVIStream *iface, LONG start,
 623                                           LONG samples)
 624 {
 625   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 626
 627   TRACE("(%p,%ld,%ld)\n", iface, start, samples);
 628
 629   /* check parameters */
 630   if (start < 0 || samples < 0)
 631     return AVIERR_BADPARAM;
 632
 633   /* Delete before start of stream? */
 634   if ((DWORD)(start + samples) < This->sInfo.dwStart)
 635     return AVIERR_OK;
 636
 637   /* Delete after end of stream? */
 638   if ((DWORD)start > This->sInfo.dwLength)
 639     return AVIERR_OK;
 640
 641   /* For the rest we need write capability */
 642   if ((This->sInfo.dwCaps & AVIFILECAPS_CANWRITE) == 0)
 643     return AVIERR_READONLY;
 644
 645   /* A compressor is also necessary */
 646   if (This->has == NULL)
 647     return AVIERR_NOCOMPRESSOR;
 648
 649   /* map our positions to pStream positions */
 650   CONVERT_THIS_to_STREAM(&start);
 651   CONVERT_THIS_to_STREAM(&samples);
 652
 653   return IAVIStream_Delete(This->pStream, start, samples);
 654 }
 655
 656 static HRESULT WINAPI ACMStream_fnReadData(IAVIStream *iface, DWORD fcc,
 657                                             LPVOID lp, LPLONG lpread)
 658 {
 659   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 660
 661   TRACE("(%p,0x%08lX,%p,%p)\n", iface, fcc, lp, lpread);
 662
 663   assert(This->pStream != NULL);
 664
 665   return IAVIStream_ReadData(This->pStream, fcc, lp, lpread);
 666 }
 667
 668 static HRESULT WINAPI ACMStream_fnWriteData(IAVIStream *iface, DWORD fcc,
 669                                              LPVOID lp, LONG size)
 670 {
 671   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 672
 673   TRACE("(%p,0x%08lx,%p,%ld)\n", iface, fcc, lp, size);
 674
 675   assert(This->pStream != NULL);
 676
 677   return IAVIStream_WriteData(This->pStream, fcc, lp, size);
 678 }
 679
 680 static HRESULT WINAPI ACMStream_fnSetInfo(IAVIStream *iface,
 681                                            LPAVISTREAMINFOW info, LONG infolen)
 682 {
 683   FIXME("(%p,%p,%ld): stub\n", iface, info, infolen);
 684
 685   return E_FAIL;
 686 }
 687
 688 /***********************************************************************/
 689
 690 static HRESULT AVIFILE_OpenCompressor(IAVIStreamImpl *This)
 691 {
 692   HRESULT hr;
 693
 694   /* pre-conditions */
 695   assert(This != NULL);
 696   assert(This->pStream != NULL);
 697
 698   if (This->has != NULL)
 699     return AVIERR_OK;
 700
 701   if (This->lpInFormat == NULL) {
 702     /* decode or encode the data from pStream */
 703     hr = AVIStreamFormatSize(This->pStream, This->sInfo.dwStart, &This->cbInFormat);
 704     if (FAILED(hr))
 705       return hr;
 706     This->lpInFormat = (LPWAVEFORMATEX)GlobalAllocPtr(GMEM_MOVEABLE, This->cbInFormat);
 707     if (This->lpInFormat == NULL)
 708       return AVIERR_MEMORY;
 709
 710     hr = IAVIStream_ReadFormat(This->pStream, This->sInfo.dwStart,
 711                                This->lpInFormat, &This->cbInFormat);
 712     if (FAILED(hr))
 713       return hr;
 714
 715     if (This->lpOutFormat == NULL) {
 716       /* we must decode to default format */
 717       This->cbOutFormat = sizeof(PCMWAVEFORMAT);
 718       This->lpOutFormat = (LPWAVEFORMATEX)GlobalAllocPtr(GHND, This->cbOutFormat);
 719       if (This->lpOutFormat == NULL)
 720         return AVIERR_MEMORY;
 721
 722       This->lpOutFormat->wFormatTag = WAVE_FORMAT_PCM;
 723       if (acmFormatSuggest(NULL, This->lpInFormat, This->lpOutFormat,
 724                            This->cbOutFormat, ACM_FORMATSUGGESTF_WFORMATTAG) != S_OK)
 725         return AVIERR_NOCOMPRESSOR;
 726     }
 727   } else if (This->lpOutFormat == NULL)
 728     return AVIERR_ERROR; /* To what should I encode? */
 729
 730   if (acmStreamOpen(&This->has, NULL, This->lpInFormat, This->lpOutFormat,
 731                     NULL, 0, 0, ACM_STREAMOPENF_NONREALTIME) != S_OK)
 732     return AVIERR_NOCOMPRESSOR;
 733
 734   /* update AVISTREAMINFO structure */
 735   This->sInfo.dwSampleSize = This->lpOutFormat->nBlockAlign;
 736   This->sInfo.dwScale      = This->lpOutFormat->nBlockAlign;
 737   This->sInfo.dwRate       = This->lpOutFormat->nAvgBytesPerSec;
 738   This->sInfo.dwQuality    = (DWORD)ICQUALITY_DEFAULT;
 739   SetRectEmpty(&This->sInfo.rcFrame);
 740
 741   /* convert positions ansd sizes to output format */
 742   CONVERT_STREAM_to_THIS(&This->sInfo.dwStart);
 743   CONVERT_STREAM_to_THIS(&This->sInfo.dwLength);
 744   CONVERT_STREAM_to_THIS(&This->sInfo.dwSuggestedBufferSize);
 745
 746   return AVIERR_OK;
 747 }