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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 "mmsystem.h"
  30 #include "vfw.h"
  31 #include "msacm.h"
  32
  33 #include "avifile_private.h"
  34
  35 #include "wine/debug.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(avifile);
  38
  39 /***********************************************************************/
  40
  41 static HRESULT WINAPI ACMStream_fnQueryInterface(IAVIStream*iface,REFIID refiid,LPVOID *obj);
  42 static ULONG   WINAPI ACMStream_fnAddRef(IAVIStream*iface);
  43 static ULONG   WINAPI ACMStream_fnRelease(IAVIStream* iface);
  44 static HRESULT WINAPI ACMStream_fnCreate(IAVIStream*iface,LPARAM lParam1,LPARAM lParam2);
  45 static HRESULT WINAPI ACMStream_fnInfo(IAVIStream*iface,AVISTREAMINFOW *psi,LONG size);
  46 static LONG    WINAPI ACMStream_fnFindSample(IAVIStream*iface,LONG pos,LONG flags);
  47 static HRESULT WINAPI ACMStream_fnReadFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG *formatsize);
  48 static HRESULT WINAPI ACMStream_fnSetFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG formatsize);
  49 static HRESULT WINAPI ACMStream_fnRead(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,LONG *bytesread,LONG *samplesread);
  50 static HRESULT WINAPI ACMStream_fnWrite(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,DWORD flags,LONG *sampwritten,LONG *byteswritten);
  51 static HRESULT WINAPI ACMStream_fnDelete(IAVIStream*iface,LONG start,LONG samples);
  52 static HRESULT WINAPI ACMStream_fnReadData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG *lpread);
  53 static HRESULT WINAPI ACMStream_fnWriteData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG size);
  54 static HRESULT WINAPI ACMStream_fnSetInfo(IAVIStream*iface,AVISTREAMINFOW*info,LONG infolen);
  55
  56 static const struct IAVIStreamVtbl iacmst = {
  57   ACMStream_fnQueryInterface,
  58   ACMStream_fnAddRef,
  59   ACMStream_fnRelease,
  60   ACMStream_fnCreate,
  61   ACMStream_fnInfo,
  62   ACMStream_fnFindSample,
  63   ACMStream_fnReadFormat,
  64   ACMStream_fnSetFormat,
  65   ACMStream_fnRead,
  66   ACMStream_fnWrite,
  67   ACMStream_fnDelete,
  68   ACMStream_fnReadData,
  69   ACMStream_fnWriteData,
  70   ACMStream_fnSetInfo
  71 };
  72
  73 typedef struct _IAVIStreamImpl {
  74   /* IUnknown stuff */
  75   const IAVIStreamVtbl *lpVtbl;
  76   LONG            ref;
  77
  78   /* IAVIStream stuff */
  79   PAVISTREAM      pStream;
  80   AVISTREAMINFOW  sInfo;
  81
  82   HACMSTREAM      has;
  83
  84   LPWAVEFORMATEX  lpInFormat;
  85   LONG            cbInFormat;
  86
  87   LPWAVEFORMATEX  lpOutFormat;
  88   LONG            cbOutFormat;
  89
  90   ACMSTREAMHEADER acmStreamHdr;
  91 } IAVIStreamImpl;
  92
  93 /***********************************************************************/
  94
  95 #define CONVERT_STREAM_to_THIS(a) do { \
  96            DWORD __bytes; \
  97            acmStreamSize(This->has,*(a) * This->lpInFormat->nBlockAlign,\
  98                          &__bytes, ACM_STREAMSIZEF_SOURCE); \
  99            *(a) = __bytes / This->lpOutFormat->nBlockAlign; } while(0)
 100
 101 #define CONVERT_THIS_to_STREAM(a) do { \
 102            DWORD __bytes; \
 103            acmStreamSize(This->has,*(a) * This->lpOutFormat->nBlockAlign,\
 104                          &__bytes, ACM_STREAMSIZEF_DESTINATION); \
 105            *(a) = __bytes / This->lpInFormat->nBlockAlign; } while(0)
 106
 107 static HRESULT AVIFILE_OpenCompressor(IAVIStreamImpl *This);
 108
 109 HRESULT AVIFILE_CreateACMStream(REFIID riid, LPVOID *ppv)
 110 {
 111   IAVIStreamImpl *pstream;
 112   HRESULT         hr;
 113
 114   assert(riid != NULL && ppv != NULL);
 115
 116   *ppv = NULL;
 117
 118   pstream = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IAVIStreamImpl));
 119   if (pstream == NULL)
 120     return AVIERR_MEMORY;
 121
 122   pstream->lpVtbl = &iacmst;
 123
 124   hr = IAVIStream_QueryInterface((IAVIStream*)pstream, riid, ppv);
 125   if (FAILED(hr))
 126     HeapFree(GetProcessHeap(), 0, pstream);
 127
 128   return hr;
 129 }
 130
 131 static HRESULT WINAPI ACMStream_fnQueryInterface(IAVIStream *iface,
 132                                                   REFIID refiid, LPVOID *obj)
 133 {
 134   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 135
 136   TRACE("(%p,%s,%p)\n", iface, debugstr_guid(refiid), obj);
 137
 138   if (IsEqualGUID(&IID_IUnknown, refiid) ||
 139       IsEqualGUID(&IID_IAVIStream, refiid)) {
 140     *obj = This;
 141     IAVIStream_AddRef(iface);
 142
 143     return S_OK;
 144   }
 145
 146   return OLE_E_ENUM_NOMORE;
 147 }
 148
 149 static ULONG WINAPI ACMStream_fnAddRef(IAVIStream *iface)
 150 {
 151   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 152   ULONG ref = InterlockedIncrement(&This->ref);
 153
 154   TRACE("(%p) -> %ld\n", iface, ref);
 155
 156   /* also add reference to the nested stream */
 157   if (This->pStream != NULL)
 158     IAVIStream_AddRef(This->pStream);
 159
 160   return ref;
 161 }
 162
 163 static ULONG WINAPI ACMStream_fnRelease(IAVIStream* iface)
 164 {
 165   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 166   ULONG ref = InterlockedDecrement(&This->ref);
 167
 168   TRACE("(%p) -> %ld\n", iface, ref);
 169
 170   if (ref == 0) {
 171     /* destruct */
 172     if (This->has != NULL) {
 173       if (This->acmStreamHdr.fdwStatus & ACMSTREAMHEADER_STATUSF_PREPARED)
 174         acmStreamUnprepareHeader(This->has, &This->acmStreamHdr, 0);
 175       acmStreamClose(This->has, 0);
 176       This->has = NULL;
 177     }
 178     HeapFree(GetProcessHeap(), 0, This->acmStreamHdr.pbSrc);
 179     This->acmStreamHdr.pbSrc = NULL;
 180     HeapFree(GetProcessHeap(), 0, This->acmStreamHdr.pbDst);
 181     This->acmStreamHdr.pbDst = NULL;
 182     if (This->lpInFormat != NULL) {
 183       HeapFree(GetProcessHeap(), 0, This->lpInFormat);
 184       This->lpInFormat = NULL;
 185       This->cbInFormat = 0;
 186     }
 187     if (This->lpOutFormat != NULL) {
 188       HeapFree(GetProcessHeap(), 0, This->lpOutFormat);
 189       This->lpOutFormat = NULL;
 190       This->cbOutFormat = 0;
 191     }
 192     if (This->pStream != NULL) {
 193       IAVIStream_Release(This->pStream);
 194       This->pStream = NULL;
 195     }
 196     HeapFree(GetProcessHeap(), 0, This);
 197
 198     return 0;
 199   }
 200
 201   /* also release reference to the nested stream */
 202   if (This->pStream != NULL)
 203     IAVIStream_Release(This->pStream);
 204
 205   return ref;
 206 }
 207
 208 /* lParam1: PAVISTREAM
 209  * lParam2: LPAVICOMPRESSOPTIONS -- even if doc's say LPWAVEFORMAT
 210  */
 211 static HRESULT WINAPI ACMStream_fnCreate(IAVIStream *iface, LPARAM lParam1,
 212                                           LPARAM lParam2)
 213 {
 214   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 215
 216   TRACE("(%p,0x%08lX,0x%08lX)\n", iface, lParam1, lParam2);
 217
 218   /* check for swapped parameters */
 219   if ((LPVOID)lParam1 != NULL &&
 220       ((LPAVICOMPRESSOPTIONS)lParam1)->fccType == streamtypeAUDIO) {
 221     register LPARAM tmp = lParam1;
 222
 223     lParam1 = lParam2;
 224     lParam2 = tmp;
 225   }
 226
 227   if ((LPVOID)lParam1 == NULL)
 228     return AVIERR_BADPARAM;
 229
 230   IAVIStream_Info((PAVISTREAM)lParam1, &This->sInfo, sizeof(This->sInfo));
 231   if (This->sInfo.fccType != streamtypeAUDIO)
 232     return AVIERR_ERROR; /* error in registry or AVIMakeCompressedStream */
 233
 234   This->sInfo.fccHandler = 0; /* be paranoid */
 235
 236   /* FIXME: check ACM version? Which version does we need? */
 237
 238   if ((LPVOID)lParam2 != NULL) {
 239     /* We only need the format from the compress-options */
 240     if (((LPAVICOMPRESSOPTIONS)lParam2)->fccType == streamtypeAUDIO)
 241       lParam2 = (LPARAM)((LPAVICOMPRESSOPTIONS)lParam2)->lpFormat;
 242
 243     if (((LPWAVEFORMATEX)lParam2)->wFormatTag != WAVE_FORMAT_PCM)
 244       This->cbOutFormat = sizeof(WAVEFORMATEX) + ((LPWAVEFORMATEX)lParam2)->cbSize;
 245     else
 246       This->cbOutFormat = sizeof(PCMWAVEFORMAT);
 247
 248     This->lpOutFormat = HeapAlloc(GetProcessHeap(), 0, This->cbOutFormat);
 249     if (This->lpOutFormat == NULL)
 250       return AVIERR_MEMORY;
 251
 252     memcpy(This->lpOutFormat, (LPVOID)lParam2, This->cbOutFormat);
 253   } else {
 254     This->lpOutFormat = NULL;
 255     This->cbOutFormat = 0;
 256   }
 257
 258   This->pStream = (PAVISTREAM)lParam1;
 259   IAVIStream_AddRef(This->pStream);
 260
 261   return AVIERR_OK;
 262 }
 263
 264 static HRESULT WINAPI ACMStream_fnInfo(IAVIStream *iface,LPAVISTREAMINFOW psi,
 265                                         LONG size)
 266 {
 267   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 268
 269   TRACE("(%p,%p,%ld)\n", iface, psi, size);
 270
 271   if (psi == NULL)
 272     return AVIERR_BADPARAM;
 273   if (size < 0)
 274     return AVIERR_BADSIZE;
 275
 276   /* Need codec to correct some values in structure */
 277   if (This->has == NULL) {
 278     HRESULT hr = AVIFILE_OpenCompressor(This);
 279
 280     if (FAILED(hr))
 281       return hr;
 282   }
 283
 284   memcpy(psi, &This->sInfo, min(size, (LONG)sizeof(This->sInfo)));
 285
 286   if (size < (LONG)sizeof(This->sInfo))
 287     return AVIERR_BUFFERTOOSMALL;
 288   return AVIERR_OK;
 289 }
 290
 291 static LONG WINAPI ACMStream_fnFindSample(IAVIStream *iface, LONG pos,
 292                                            LONG flags)
 293 {
 294   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 295
 296   TRACE("(%p,%ld,0x%08lX)\n",iface,pos,flags);
 297
 298   if (flags & FIND_FROM_START) {
 299     pos = This->sInfo.dwStart;
 300     flags &= ~(FIND_FROM_START|FIND_PREV);
 301     flags |= FIND_NEXT;
 302   }
 303
 304   /* convert pos from our 'space' to This->pStream's one */
 305   CONVERT_THIS_to_STREAM(&pos);
 306
 307   /* ask stream */
 308   pos = IAVIStream_FindSample(This->pStream, pos, flags);
 309
 310   if (pos != -1) {
 311     /* convert pos back to our 'space' if it's no size or physical pos */
 312     if ((flags & FIND_RET) == 0)
 313       CONVERT_STREAM_to_THIS(&pos);
 314   }
 315
 316   return pos;
 317 }
 318
 319 static HRESULT WINAPI ACMStream_fnReadFormat(IAVIStream *iface, LONG pos,
 320                                               LPVOID format, LONG *formatsize)
 321 {
 322   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 323
 324   TRACE("(%p,%ld,%p,%p)\n", iface, pos, format, formatsize);
 325
 326   if (formatsize == NULL)
 327     return AVIERR_BADPARAM;
 328
 329   if (This->has == NULL) {
 330     HRESULT hr = AVIFILE_OpenCompressor(This);
 331
 332     if (FAILED(hr))
 333       return hr;
 334   }
 335
 336   /* only interested in needed buffersize? */
 337   if (format == NULL || *formatsize <= 0) {
 338     *formatsize = This->cbOutFormat;
 339
 340     return AVIERR_OK;
 341   }
 342
 343   /* copy initial format (only as much as will fit) */
 344   memcpy(format, This->lpOutFormat, min(*formatsize, This->cbOutFormat));
 345   if (*formatsize < This->cbOutFormat) {
 346     *formatsize = This->cbOutFormat;
 347     return AVIERR_BUFFERTOOSMALL;
 348   }
 349
 350   *formatsize = This->cbOutFormat;
 351   return AVIERR_OK;
 352 }
 353
 354 static HRESULT WINAPI ACMStream_fnSetFormat(IAVIStream *iface, LONG pos,
 355                                              LPVOID format, LONG formatsize)
 356 {
 357   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 358
 359   HRESULT hr;
 360
 361   TRACE("(%p,%ld,%p,%ld)\n", iface, pos, format, formatsize);
 362
 363   /* check parameters */
 364   if (format == NULL || formatsize <= 0)
 365     return AVIERR_BADPARAM;
 366
 367   /* Input format already known?
 368    * Changing is unsupported, but be quiet if it's the same */
 369   if (This->lpInFormat != NULL) {
 370     if (This->cbInFormat != formatsize ||
 371         memcmp(format, This->lpInFormat, formatsize) != 0)
 372       return AVIERR_UNSUPPORTED;
 373
 374     return AVIERR_OK;
 375   }
 376
 377   /* Does the nested stream support writing? */
 378   if ((This->sInfo.dwCaps & AVIFILECAPS_CANWRITE) == 0)
 379     return AVIERR_READONLY;
 380
 381   This->lpInFormat = HeapAlloc(GetProcessHeap(), 0, formatsize);
 382   if (This->lpInFormat == NULL)
 383     return AVIERR_MEMORY;
 384   This->cbInFormat = formatsize;
 385   memcpy(This->lpInFormat, format, formatsize);
 386
 387   /* initialize formats and get compressor */
 388   hr = AVIFILE_OpenCompressor(This);
 389   if (FAILED(hr))
 390     return hr;
 391
 392   CONVERT_THIS_to_STREAM(&pos);
 393
 394   /* tell the nested stream the new format */
 395   return IAVIStream_SetFormat(This->pStream, pos, This->lpOutFormat,
 396                               This->cbOutFormat);
 397 }
 398
 399 static HRESULT WINAPI ACMStream_fnRead(IAVIStream *iface, LONG start,
 400                                         LONG samples, LPVOID buffer,
 401                                         LONG buffersize, LPLONG bytesread,
 402                                         LPLONG samplesread)
 403 {
 404   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 405
 406   HRESULT hr;
 407   DWORD   size;
 408
 409   TRACE("(%p,%ld,%ld,%p,%ld,%p,%p)\n", iface, start, samples, buffer,
 410         buffersize, bytesread, samplesread);
 411
 412   /* clear return parameters if given */
 413   if (bytesread != NULL)
 414     *bytesread = 0;
 415   if (samplesread != NULL)
 416     *samplesread = 0;
 417
 418   /* Do we have our compressor? */
 419   if (This->has == NULL) {
 420     hr = AVIFILE_OpenCompressor(This);
 421
 422     if (FAILED(hr))
 423       return hr;
 424   }
 425
 426   /* only need to pass through? */
 427   if (This->cbInFormat == This->cbOutFormat &&
 428       memcmp(This->lpInFormat, This->lpOutFormat, This->cbInFormat) == 0) {
 429     return IAVIStream_Read(This->pStream, start, samples, buffer, buffersize,
 430                            bytesread, samplesread);
 431   }
 432
 433   /* read as much as fit? */
 434   if (samples == -1)
 435     samples = buffersize / This->lpOutFormat->nBlockAlign;
 436   /* limit to buffersize */
 437   if (samples * This->lpOutFormat->nBlockAlign > buffersize)
 438     samples = buffersize / This->lpOutFormat->nBlockAlign;
 439
 440   /* only return needed size? */
 441   if (buffer == NULL || buffersize <= 0 || samples == 0) {
 442     if (bytesread == NULL && samplesread == NULL)
 443       return AVIERR_BADPARAM;
 444
 445     if (bytesread != NULL)
 446       *bytesread = samples * This->lpOutFormat->nBlockAlign;
 447     if (samplesread != NULL)
 448       *samplesread = samples;
 449
 450     return AVIERR_OK;
 451   }
 452
 453   /* map our positions to pStream positions */
 454   CONVERT_THIS_to_STREAM(&start);
 455
 456   /* our needed internal buffersize */
 457   size = samples * This->lpInFormat->nBlockAlign;
 458
 459   /* Need to free destination buffer used for writing? */
 460   if (This->acmStreamHdr.pbDst != NULL) {
 461     HeapFree(GetProcessHeap(), 0, This->acmStreamHdr.pbDst);
 462     This->acmStreamHdr.pbDst     = NULL;
 463     This->acmStreamHdr.dwDstUser = 0;
 464   }
 465
 466   /* need bigger source buffer? */
 467   if (This->acmStreamHdr.pbSrc == NULL ||
 468       This->acmStreamHdr.dwSrcUser < size) {
 469     if (This->acmStreamHdr.pbSrc == NULL)
 470       This->acmStreamHdr.pbSrc = HeapAlloc(GetProcessHeap(), 0, size);
 471     else
 472       This->acmStreamHdr.pbDst = HeapReAlloc(GetProcessHeap(), 0, This->acmStreamHdr.pbSrc, size);
 473     if (This->acmStreamHdr.pbSrc == NULL)
 474       return AVIERR_MEMORY;
 475     This->acmStreamHdr.dwSrcUser = size;
 476   }
 477
 478   This->acmStreamHdr.cbStruct = sizeof(This->acmStreamHdr);
 479   This->acmStreamHdr.cbSrcLengthUsed = 0;
 480   This->acmStreamHdr.cbDstLengthUsed = 0;
 481   This->acmStreamHdr.cbSrcLength     = size;
 482
 483   /* read source data */
 484   hr = IAVIStream_Read(This->pStream, start, -1, This->acmStreamHdr.pbSrc,
 485                        This->acmStreamHdr.cbSrcLength,
 486                        (LONG *)&This->acmStreamHdr.cbSrcLength, NULL);
 487   if (FAILED(hr) || This->acmStreamHdr.cbSrcLength == 0)
 488     return hr;
 489
 490   /* need to prepare stream? */
 491   This->acmStreamHdr.pbDst       = buffer;
 492   This->acmStreamHdr.cbDstLength = buffersize;
 493   if ((This->acmStreamHdr.fdwStatus & ACMSTREAMHEADER_STATUSF_PREPARED) == 0) {
 494     if (acmStreamPrepareHeader(This->has, &This->acmStreamHdr, 0) != S_OK) {
 495       This->acmStreamHdr.pbDst       = NULL;
 496       This->acmStreamHdr.cbDstLength = 0;
 497       return AVIERR_COMPRESSOR;
 498     }
 499   }
 500
 501   /* now do the conversion */
 502   /* FIXME: use ACM_CONVERTF_* flags */
 503   if (acmStreamConvert(This->has, &This->acmStreamHdr, 0) != S_OK)
 504     hr = AVIERR_COMPRESSOR;
 505
 506   This->acmStreamHdr.pbDst       = NULL;
 507   This->acmStreamHdr.cbDstLength = 0;
 508
 509   /* fill out return parameters if given */
 510   if (bytesread != NULL)
 511     *bytesread = This->acmStreamHdr.cbDstLengthUsed;
 512   if (samplesread != NULL)
 513     *samplesread =
 514       This->acmStreamHdr.cbDstLengthUsed / This->lpOutFormat->nBlockAlign;
 515
 516   return hr;
 517 }
 518
 519 static HRESULT WINAPI ACMStream_fnWrite(IAVIStream *iface, LONG start,
 520                                          LONG samples, LPVOID buffer,
 521                                          LONG buffersize, DWORD flags,
 522                                          LPLONG sampwritten,
 523                                          LPLONG byteswritten)
 524 {
 525   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 526
 527   HRESULT hr;
 528   ULONG   size;
 529
 530   TRACE("(%p,%ld,%ld,%p,%ld,0x%08lX,%p,%p)\n", iface, start, samples,
 531         buffer, buffersize, flags, sampwritten, byteswritten);
 532
 533   /* clear return parameters if given */
 534   if (sampwritten != NULL)
 535     *sampwritten = 0;
 536   if (byteswritten != NULL)
 537     *byteswritten = 0;
 538
 539   /* check parameters */
 540   if (buffer == NULL && (buffersize > 0 || samples > 0))
 541     return AVIERR_BADPARAM;
 542
 543   /* Have we write capability? */
 544   if ((This->sInfo.dwCaps & AVIFILECAPS_CANWRITE) == 0)
 545     return AVIERR_READONLY;
 546
 547   /* also need a compressor */
 548   if (This->has == NULL)
 549     return AVIERR_NOCOMPRESSOR;
 550
 551   /* map our sizes to pStream sizes */
 552   size = buffersize;
 553   CONVERT_THIS_to_STREAM(&size);
 554   CONVERT_THIS_to_STREAM(&start);
 555
 556   /* no bytes to write? -- short circuit */
 557   if (size == 0) {
 558     return IAVIStream_Write(This->pStream, -1, samples, buffer, size,
 559                             flags, sampwritten, byteswritten);
 560   }
 561
 562   /* Need to free source buffer used for reading? */
 563   if (This->acmStreamHdr.pbSrc != NULL) {
 564     HeapFree(GetProcessHeap(), 0, This->acmStreamHdr.pbSrc);
 565     This->acmStreamHdr.pbSrc     = NULL;
 566     This->acmStreamHdr.dwSrcUser = 0;
 567   }
 568
 569   /* Need bigger destination buffer? */
 570   if (This->acmStreamHdr.pbDst == NULL ||
 571       This->acmStreamHdr.dwDstUser < size) {
 572     if (This->acmStreamHdr.pbDst == NULL)
 573       This->acmStreamHdr.pbDst = HeapAlloc(GetProcessHeap(), 0, size);
 574     else
 575       This->acmStreamHdr.pbDst = HeapReAlloc(GetProcessHeap(), 0, This->acmStreamHdr.pbDst, size);
 576     if (This->acmStreamHdr.pbDst == NULL)
 577       return AVIERR_MEMORY;
 578     This->acmStreamHdr.dwDstUser = size;
 579   }
 580   This->acmStreamHdr.cbStruct        = sizeof(This->acmStreamHdr);
 581   This->acmStreamHdr.cbSrcLengthUsed = 0;
 582   This->acmStreamHdr.cbDstLengthUsed = 0;
 583   This->acmStreamHdr.cbDstLength     = This->acmStreamHdr.dwDstUser;
 584
 585   /* need to prepare stream? */
 586   This->acmStreamHdr.pbSrc       = buffer;
 587   This->acmStreamHdr.cbSrcLength = buffersize;
 588   if ((This->acmStreamHdr.fdwStatus & ACMSTREAMHEADER_STATUSF_PREPARED) == 0) {
 589     if (acmStreamPrepareHeader(This->has, &This->acmStreamHdr, 0) != S_OK) {
 590       This->acmStreamHdr.pbSrc       = NULL;
 591       This->acmStreamHdr.cbSrcLength = 0;
 592       return AVIERR_COMPRESSOR;
 593     }
 594   }
 595
 596   /* now do the conversion */
 597   /* FIXME: use ACM_CONVERTF_* flags */
 598   if (acmStreamConvert(This->has, &This->acmStreamHdr, 0) != S_OK)
 599     hr = AVIERR_COMPRESSOR;
 600   else
 601     hr = AVIERR_OK;
 602
 603   This->acmStreamHdr.pbSrc       = NULL;
 604   This->acmStreamHdr.cbSrcLength = 0;
 605
 606   if (FAILED(hr))
 607     return hr;
 608
 609   return IAVIStream_Write(This->pStream,-1,This->acmStreamHdr.cbDstLengthUsed /
 610                           This->lpOutFormat->nBlockAlign,This->acmStreamHdr.pbDst,
 611                           This->acmStreamHdr.cbDstLengthUsed,flags,sampwritten,
 612                           byteswritten);
 613 }
 614
 615 static HRESULT WINAPI ACMStream_fnDelete(IAVIStream *iface, LONG start,
 616                                           LONG samples)
 617 {
 618   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 619
 620   TRACE("(%p,%ld,%ld)\n", iface, start, samples);
 621
 622   /* check parameters */
 623   if (start < 0 || samples < 0)
 624     return AVIERR_BADPARAM;
 625
 626   /* Delete before start of stream? */
 627   if ((DWORD)(start + samples) < This->sInfo.dwStart)
 628     return AVIERR_OK;
 629
 630   /* Delete after end of stream? */
 631   if ((DWORD)start > This->sInfo.dwLength)
 632     return AVIERR_OK;
 633
 634   /* For the rest we need write capability */
 635   if ((This->sInfo.dwCaps & AVIFILECAPS_CANWRITE) == 0)
 636     return AVIERR_READONLY;
 637
 638   /* A compressor is also necessary */
 639   if (This->has == NULL)
 640     return AVIERR_NOCOMPRESSOR;
 641
 642   /* map our positions to pStream positions */
 643   CONVERT_THIS_to_STREAM(&start);
 644   CONVERT_THIS_to_STREAM(&samples);
 645
 646   return IAVIStream_Delete(This->pStream, start, samples);
 647 }
 648
 649 static HRESULT WINAPI ACMStream_fnReadData(IAVIStream *iface, DWORD fcc,
 650                                             LPVOID lp, LPLONG lpread)
 651 {
 652   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 653
 654   TRACE("(%p,0x%08lX,%p,%p)\n", iface, fcc, lp, lpread);
 655
 656   assert(This->pStream != NULL);
 657
 658   return IAVIStream_ReadData(This->pStream, fcc, lp, lpread);
 659 }
 660
 661 static HRESULT WINAPI ACMStream_fnWriteData(IAVIStream *iface, DWORD fcc,
 662                                              LPVOID lp, LONG size)
 663 {
 664   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 665
 666   TRACE("(%p,0x%08lx,%p,%ld)\n", iface, fcc, lp, size);
 667
 668   assert(This->pStream != NULL);
 669
 670   return IAVIStream_WriteData(This->pStream, fcc, lp, size);
 671 }
 672
 673 static HRESULT WINAPI ACMStream_fnSetInfo(IAVIStream *iface,
 674                                            LPAVISTREAMINFOW info, LONG infolen)
 675 {
 676   FIXME("(%p,%p,%ld): stub\n", iface, info, infolen);
 677
 678   return E_FAIL;
 679 }
 680
 681 /***********************************************************************/
 682
 683 static HRESULT AVIFILE_OpenCompressor(IAVIStreamImpl *This)
 684 {
 685   HRESULT hr;
 686
 687   /* pre-conditions */
 688   assert(This != NULL);
 689   assert(This->pStream != NULL);
 690
 691   if (This->has != NULL)
 692     return AVIERR_OK;
 693
 694   if (This->lpInFormat == NULL) {
 695     /* decode or encode the data from pStream */
 696     hr = AVIStreamFormatSize(This->pStream, This->sInfo.dwStart, &This->cbInFormat);
 697     if (FAILED(hr))
 698       return hr;
 699     This->lpInFormat = HeapAlloc(GetProcessHeap(), 0, This->cbInFormat);
 700     if (This->lpInFormat == NULL)
 701       return AVIERR_MEMORY;
 702
 703     hr = IAVIStream_ReadFormat(This->pStream, This->sInfo.dwStart,
 704                                This->lpInFormat, &This->cbInFormat);
 705     if (FAILED(hr))
 706       return hr;
 707
 708     if (This->lpOutFormat == NULL) {
 709       /* we must decode to default format */
 710       This->cbOutFormat = sizeof(PCMWAVEFORMAT);
 711       This->lpOutFormat = HeapAlloc(GetProcessHeap(), 0, This->cbOutFormat);
 712       if (This->lpOutFormat == NULL)
 713         return AVIERR_MEMORY;
 714
 715       This->lpOutFormat->wFormatTag = WAVE_FORMAT_PCM;
 716       if (acmFormatSuggest(NULL, This->lpInFormat, This->lpOutFormat,
 717                            This->cbOutFormat, ACM_FORMATSUGGESTF_WFORMATTAG) != S_OK)
 718         return AVIERR_NOCOMPRESSOR;
 719     }
 720   } else if (This->lpOutFormat == NULL)
 721     return AVIERR_ERROR; /* To what should I encode? */
 722
 723   if (acmStreamOpen(&This->has, NULL, This->lpInFormat, This->lpOutFormat,
 724                     NULL, 0, 0, ACM_STREAMOPENF_NONREALTIME) != S_OK)
 725     return AVIERR_NOCOMPRESSOR;
 726
 727   /* update AVISTREAMINFO structure */
 728   This->sInfo.dwSampleSize = This->lpOutFormat->nBlockAlign;
 729   This->sInfo.dwScale      = This->lpOutFormat->nBlockAlign;
 730   This->sInfo.dwRate       = This->lpOutFormat->nAvgBytesPerSec;
 731   This->sInfo.dwQuality    = (DWORD)ICQUALITY_DEFAULT;
 732   SetRectEmpty(&This->sInfo.rcFrame);
 733
 734   /* convert positions ansd sizes to output format */
 735   CONVERT_STREAM_to_THIS(&This->sInfo.dwStart);
 736   CONVERT_STREAM_to_THIS(&This->sInfo.dwLength);
 737   CONVERT_STREAM_to_THIS(&This->sInfo.dwSuggestedBufferSize);
 738
 739   return AVIERR_OK;
 740 }