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