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

   1 /*
   2  * Copyright 1999 Marcus Meissner
   3  * Copyright 2002-2003 Michael Günnewig
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 /* TODO:
  21  *  - IAVIStreaming interface is missing for the IAVIStreamImpl
  22  *  - IAVIStream_fnFindSample: FIND_INDEX isn't supported.
  23  *  - IAVIStream_fnReadFormat: formatchanges aren't read in.
  24  *  - IAVIStream_fnDelete: a stub.
  25  *  - IAVIStream_fnSetInfo: a stub.
  26  *  - make thread safe
  27  *
  28  * KNOWN Bugs:
  29  *  - native version can hangup when reading a file generated with this DLL.
  30  *    When index is missing it works, but index seems to be okay.
  31  */
  32
  33 #include <assert.h>
  34 #include <stdarg.h>
  35
  36 #include "windef.h"
  37 #include "winbase.h"
  38 #include "wingdi.h"
  39 #include "winuser.h"
  40 #include "winnls.h"
  41 #include "winerror.h"
  42 #include "mmsystem.h"
  43 #include "vfw.h"
  44
  45 #include "avifile_private.h"
  46 #include "extrachunk.h"
  47
  48 #include "wine/unicode.h"
  49 #include "wine/debug.h"
  50
  51 WINE_DEFAULT_DEBUG_CHANNEL(avifile);
  52
  53 #ifndef IDX_PER_BLOCK
  54 #define IDX_PER_BLOCK 2730
  55 #endif
  56
  57 /***********************************************************************/
  58
  59 static HRESULT WINAPI IAVIFile_fnQueryInterface(IAVIFile* iface,REFIID refiid,LPVOID *obj);
  60 static ULONG   WINAPI IAVIFile_fnAddRef(IAVIFile* iface);
  61 static ULONG   WINAPI IAVIFile_fnRelease(IAVIFile* iface);
  62 static HRESULT WINAPI IAVIFile_fnInfo(IAVIFile*iface,AVIFILEINFOW*afi,LONG size);
  63 static HRESULT WINAPI IAVIFile_fnGetStream(IAVIFile*iface,PAVISTREAM*avis,DWORD fccType,LONG lParam);
  64 static HRESULT WINAPI IAVIFile_fnCreateStream(IAVIFile*iface,PAVISTREAM*avis,AVISTREAMINFOW*asi);
  65 static HRESULT WINAPI IAVIFile_fnWriteData(IAVIFile*iface,DWORD ckid,LPVOID lpData,LONG size);
  66 static HRESULT WINAPI IAVIFile_fnReadData(IAVIFile*iface,DWORD ckid,LPVOID lpData,LONG *size);
  67 static HRESULT WINAPI IAVIFile_fnEndRecord(IAVIFile*iface);
  68 static HRESULT WINAPI IAVIFile_fnDeleteStream(IAVIFile*iface,DWORD fccType,LONG lParam);
  69
  70 static const struct IAVIFileVtbl iavift = {
  71   IAVIFile_fnQueryInterface,
  72   IAVIFile_fnAddRef,
  73   IAVIFile_fnRelease,
  74   IAVIFile_fnInfo,
  75   IAVIFile_fnGetStream,
  76   IAVIFile_fnCreateStream,
  77   IAVIFile_fnWriteData,
  78   IAVIFile_fnReadData,
  79   IAVIFile_fnEndRecord,
  80   IAVIFile_fnDeleteStream
  81 };
  82
  83 static HRESULT WINAPI IPersistFile_fnQueryInterface(IPersistFile*iface,REFIID refiid,LPVOID*obj);
  84 static ULONG   WINAPI IPersistFile_fnAddRef(IPersistFile*iface);
  85 static ULONG   WINAPI IPersistFile_fnRelease(IPersistFile*iface);
  86 static HRESULT WINAPI IPersistFile_fnGetClassID(IPersistFile*iface,CLSID*pClassID);
  87 static HRESULT WINAPI IPersistFile_fnIsDirty(IPersistFile*iface);
  88 static HRESULT WINAPI IPersistFile_fnLoad(IPersistFile*iface,LPCOLESTR pszFileName,DWORD dwMode);
  89 static HRESULT WINAPI IPersistFile_fnSave(IPersistFile*iface,LPCOLESTR pszFileName,BOOL fRemember);
  90 static HRESULT WINAPI IPersistFile_fnSaveCompleted(IPersistFile*iface,LPCOLESTR pszFileName);
  91 static HRESULT WINAPI IPersistFile_fnGetCurFile(IPersistFile*iface,LPOLESTR*ppszFileName);
  92
  93 static const struct IPersistFileVtbl ipersistft = {
  94   IPersistFile_fnQueryInterface,
  95   IPersistFile_fnAddRef,
  96   IPersistFile_fnRelease,
  97   IPersistFile_fnGetClassID,
  98   IPersistFile_fnIsDirty,
  99   IPersistFile_fnLoad,
 100   IPersistFile_fnSave,
 101   IPersistFile_fnSaveCompleted,
 102   IPersistFile_fnGetCurFile
 103 };
 104
 105 static HRESULT WINAPI IAVIStream_fnQueryInterface(IAVIStream*iface,REFIID refiid,LPVOID *obj);
 106 static ULONG   WINAPI IAVIStream_fnAddRef(IAVIStream*iface);
 107 static ULONG   WINAPI IAVIStream_fnRelease(IAVIStream* iface);
 108 static HRESULT WINAPI IAVIStream_fnCreate(IAVIStream*iface,LPARAM lParam1,LPARAM lParam2);
 109 static HRESULT WINAPI IAVIStream_fnInfo(IAVIStream*iface,AVISTREAMINFOW *psi,LONG size);
 110 static LONG    WINAPI IAVIStream_fnFindSample(IAVIStream*iface,LONG pos,LONG flags);
 111 static HRESULT WINAPI IAVIStream_fnReadFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG *formatsize);
 112 static HRESULT WINAPI IAVIStream_fnSetFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG formatsize);
 113 static HRESULT WINAPI IAVIStream_fnRead(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,LONG *bytesread,LONG *samplesread);
 114 static HRESULT WINAPI IAVIStream_fnWrite(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,DWORD flags,LONG *sampwritten,LONG *byteswritten);
 115 static HRESULT WINAPI IAVIStream_fnDelete(IAVIStream*iface,LONG start,LONG samples);
 116 static HRESULT WINAPI IAVIStream_fnReadData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG *lpread);
 117 static HRESULT WINAPI IAVIStream_fnWriteData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG size);
 118 static HRESULT WINAPI IAVIStream_fnSetInfo(IAVIStream*iface,AVISTREAMINFOW*info,LONG infolen);
 119
 120 static const struct IAVIStreamVtbl iavist = {
 121   IAVIStream_fnQueryInterface,
 122   IAVIStream_fnAddRef,
 123   IAVIStream_fnRelease,
 124   IAVIStream_fnCreate,
 125   IAVIStream_fnInfo,
 126   IAVIStream_fnFindSample,
 127   IAVIStream_fnReadFormat,
 128   IAVIStream_fnSetFormat,
 129   IAVIStream_fnRead,
 130   IAVIStream_fnWrite,
 131   IAVIStream_fnDelete,
 132   IAVIStream_fnReadData,
 133   IAVIStream_fnWriteData,
 134   IAVIStream_fnSetInfo
 135 };
 136
 137 typedef struct _IAVIFileImpl IAVIFileImpl;
 138
 139 typedef struct _IPersistFileImpl {
 140   /* IUnknown stuff */
 141   const IPersistFileVtbl *lpVtbl;
 142
 143   /* IPersistFile stuff */
 144   IAVIFileImpl     *paf;
 145 } IPersistFileImpl;
 146
 147 typedef struct _IAVIStreamImpl {
 148   /* IUnknown stuff */
 149   const IAVIStreamVtbl *lpVtbl;
 150   LONG              ref;
 151
 152   /* IAVIStream stuff */
 153   IAVIFileImpl     *paf;
 154   DWORD             nStream;       /* the n-th stream in file */
 155   AVISTREAMINFOW    sInfo;
 156
 157   LPVOID            lpFormat;
 158   DWORD             cbFormat;
 159
 160   LPVOID            lpHandlerData;
 161   DWORD             cbHandlerData;
 162
 163   EXTRACHUNKS       extra;
 164
 165   LPDWORD           lpBuffer;
 166   DWORD             cbBuffer;       /* size of lpBuffer */
 167   DWORD             dwCurrentFrame; /* frame/block currently in lpBuffer */
 168
 169   LONG              lLastFrame;    /* last correct index in idxFrames */
 170   AVIINDEXENTRY    *idxFrames;
 171   DWORD             nIdxFrames;     /* upper index limit of idxFrames */
 172   AVIINDEXENTRY    *idxFmtChanges;
 173   DWORD             nIdxFmtChanges; /* upper index limit of idxFmtChanges */
 174 } IAVIStreamImpl;
 175
 176 struct _IAVIFileImpl {
 177   /* IUnknown stuff */
 178   const IAVIFileVtbl     *lpVtbl;
 179   LONG              ref;
 180
 181   /* IAVIFile stuff... */
 182   IPersistFileImpl  iPersistFile;
 183
 184   AVIFILEINFOW      fInfo;
 185   IAVIStreamImpl   *ppStreams[MAX_AVISTREAMS];
 186
 187   EXTRACHUNKS       fileextra;
 188
 189   DWORD             dwMoviChunkPos;  /* some stuff for saving ... */
 190   DWORD             dwIdxChunkPos;
 191   DWORD             dwNextFramePos;
 192   DWORD             dwInitialFrames;
 193
 194   MMCKINFO          ckLastRecord;
 195   AVIINDEXENTRY    *idxRecords;      /* won't be updated while loading */
 196   DWORD             nIdxRecords;     /* current fill level */
 197   DWORD             cbIdxRecords;    /* size of idxRecords */
 198
 199   /* IPersistFile stuff ... */
 200   HMMIO             hmmio;
 201   LPWSTR            szFileName;
 202   UINT              uMode;
 203   BOOL              fDirty;
 204 };
 205
 206 /***********************************************************************/
 207
 208 static HRESULT AVIFILE_AddFrame(IAVIStreamImpl *This, DWORD ckid, DWORD size,
 209                                 DWORD offset, DWORD flags);
 210 static HRESULT AVIFILE_AddRecord(IAVIFileImpl *This);
 211 static DWORD   AVIFILE_ComputeMoviStart(IAVIFileImpl *This);
 212 static void    AVIFILE_ConstructAVIStream(IAVIFileImpl *paf, DWORD nr,
 213                                           LPAVISTREAMINFOW asi);
 214 static void    AVIFILE_DestructAVIStream(IAVIStreamImpl *This);
 215 static HRESULT AVIFILE_LoadFile(IAVIFileImpl *This);
 216 static HRESULT AVIFILE_LoadIndex(IAVIFileImpl *This, DWORD size, DWORD offset);
 217 static HRESULT AVIFILE_ParseIndex(IAVIFileImpl *This, AVIINDEXENTRY *lp,
 218                                   LONG count, DWORD pos, BOOL *bAbsolute);
 219 static HRESULT AVIFILE_ReadBlock(IAVIStreamImpl *This, DWORD start,
 220                                  LPVOID buffer, LONG size);
 221 static void    AVIFILE_SamplesToBlock(IAVIStreamImpl *This, LPLONG pos,
 222                                       LPLONG offset);
 223 static HRESULT AVIFILE_SaveFile(IAVIFileImpl *This);
 224 static HRESULT AVIFILE_SaveIndex(IAVIFileImpl *This);
 225 static ULONG   AVIFILE_SearchStream(IAVIFileImpl *This, DWORD fccType,
 226                                     LONG lSkip);
 227 static void    AVIFILE_UpdateInfo(IAVIFileImpl *This);
 228 static HRESULT AVIFILE_WriteBlock(IAVIStreamImpl *This, DWORD block,
 229                                   FOURCC ckid, DWORD flags, LPVOID buffer,
 230                                   LONG size);
 231
 232 HRESULT AVIFILE_CreateAVIFile(REFIID riid, LPVOID *ppv)
 233 {
 234   IAVIFileImpl *pfile;
 235   HRESULT       hr;
 236
 237   assert(riid != NULL && ppv != NULL);
 238
 239   *ppv = NULL;
 240
 241   pfile = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IAVIFileImpl));
 242   if (pfile == NULL)
 243     return AVIERR_MEMORY;
 244
 245   pfile->lpVtbl = &iavift;
 246   pfile->ref = 0;
 247   pfile->iPersistFile.lpVtbl = &ipersistft;
 248   pfile->iPersistFile.paf = pfile;
 249
 250   hr = IAVIFile_QueryInterface((IAVIFile*)pfile, riid, ppv);
 251   if (FAILED(hr))
 252     HeapFree(GetProcessHeap(), 0, pfile);
 253
 254   return hr;
 255 }
 256
 257 static HRESULT WINAPI IAVIFile_fnQueryInterface(IAVIFile *iface, REFIID refiid,
 258                                                 LPVOID *obj)
 259 {
 260   IAVIFileImpl *This = (IAVIFileImpl *)iface;
 261
 262   TRACE("(%p,%s,%p)\n", This, debugstr_guid(refiid), obj);
 263
 264   if (IsEqualGUID(&IID_IUnknown, refiid) ||
 265       IsEqualGUID(&IID_IAVIFile, refiid)) {
 266     *obj = iface;
 267     IAVIFile_AddRef(iface);
 268
 269     return S_OK;
 270   } else if (IsEqualGUID(&IID_IPersistFile, refiid)) {
 271     *obj = &This->iPersistFile;
 272     IAVIFile_AddRef(iface);
 273
 274     return S_OK;
 275   }
 276
 277   return OLE_E_ENUM_NOMORE;
 278 }
 279
 280 static ULONG WINAPI IAVIFile_fnAddRef(IAVIFile *iface)
 281 {
 282   IAVIFileImpl *This = (IAVIFileImpl *)iface;
 283   ULONG ref = InterlockedIncrement(&This->ref);
 284
 285   TRACE("(%p) -> %d\n", iface, ref);
 286
 287   return ref;
 288 }
 289
 290 static ULONG WINAPI IAVIFile_fnRelease(IAVIFile *iface)
 291 {
 292   IAVIFileImpl *This = (IAVIFileImpl *)iface;
 293   UINT i;
 294   ULONG ref = InterlockedDecrement(&This->ref);
 295
 296   TRACE("(%p) -> %d\n", iface, ref);
 297
 298   if (!ref) {
 299     if (This->fDirty) {
 300       /* need to write headers to file */
 301       AVIFILE_SaveFile(This);
 302     }
 303
 304     for (i = 0; i < This->fInfo.dwStreams; i++) {
 305       if (This->ppStreams[i] != NULL) {
 306         if (This->ppStreams[i]->ref != 0) {
 307           ERR(": someone has still %u reference to stream %u (%p)!\n",
 308                This->ppStreams[i]->ref, i, This->ppStreams[i]);
 309         }
 310         AVIFILE_DestructAVIStream(This->ppStreams[i]);
 311         HeapFree(GetProcessHeap(), 0, This->ppStreams[i]);
 312         This->ppStreams[i] = NULL;
 313       }
 314     }
 315
 316     if (This->idxRecords != NULL) {
 317       HeapFree(GetProcessHeap(), 0, This->idxRecords);
 318       This->idxRecords  = NULL;
 319       This->nIdxRecords = 0;
 320     }
 321
 322     if (This->fileextra.lp != NULL) {
 323       HeapFree(GetProcessHeap(), 0, This->fileextra.lp);
 324       This->fileextra.lp = NULL;
 325       This->fileextra.cb = 0;
 326     }
 327
 328     HeapFree(GetProcessHeap(), 0, This->szFileName);
 329     This->szFileName = NULL;
 330
 331     if (This->hmmio != NULL) {
 332       mmioClose(This->hmmio, 0);
 333       This->hmmio = NULL;
 334     }
 335
 336     HeapFree(GetProcessHeap(), 0, This);
 337   }
 338   return ref;
 339 }
 340
 341 static HRESULT WINAPI IAVIFile_fnInfo(IAVIFile *iface, LPAVIFILEINFOW afi,
 342                                       LONG size)
 343 {
 344   IAVIFileImpl *This = (IAVIFileImpl *)iface;
 345
 346   TRACE("(%p,%p,%d)\n",iface,afi,size);
 347
 348   if (afi == NULL)
 349     return AVIERR_BADPARAM;
 350   if (size < 0)
 351     return AVIERR_BADSIZE;
 352
 353   AVIFILE_UpdateInfo(This);
 354
 355   memcpy(afi, &This->fInfo, min((DWORD)size, sizeof(This->fInfo)));
 356
 357   if ((DWORD)size < sizeof(This->fInfo))
 358     return AVIERR_BUFFERTOOSMALL;
 359   return AVIERR_OK;
 360 }
 361
 362 static HRESULT WINAPI IAVIFile_fnGetStream(IAVIFile *iface, PAVISTREAM *avis,
 363                                            DWORD fccType, LONG lParam)
 364 {
 365   IAVIFileImpl *This = (IAVIFileImpl *)iface;
 366
 367   ULONG nStream;
 368
 369   TRACE("(%p,%p,0x%08X,%d)\n", iface, avis, fccType, lParam);
 370
 371   if (avis == NULL || lParam < 0)
 372     return AVIERR_BADPARAM;
 373
 374   nStream = AVIFILE_SearchStream(This, fccType, lParam);
 375
 376   /* Does the requested stream exist? */
 377   if (nStream < This->fInfo.dwStreams &&
 378       This->ppStreams[nStream] != NULL) {
 379     *avis = (PAVISTREAM)This->ppStreams[nStream];
 380     IAVIStream_AddRef(*avis);
 381
 382     return AVIERR_OK;
 383   }
 384
 385   /* Sorry, but the specified stream doesn't exist */
 386   return AVIERR_NODATA;
 387 }
 388
 389 static HRESULT WINAPI IAVIFile_fnCreateStream(IAVIFile *iface,PAVISTREAM *avis,
 390                                               LPAVISTREAMINFOW asi)
 391 {
 392   IAVIFileImpl *This = (IAVIFileImpl *)iface;
 393
 394   DWORD n;
 395
 396   TRACE("(%p,%p,%p)\n", iface, avis, asi);
 397
 398   /* check parameters */
 399   if (avis == NULL || asi == NULL)
 400     return AVIERR_BADPARAM;
 401
 402   *avis = NULL;
 403
 404   /* Does the user have write permission? */
 405   if ((This->uMode & MMIO_RWMODE) == 0)
 406     return AVIERR_READONLY;
 407
 408   /* Can we add another stream? */
 409   n = This->fInfo.dwStreams;
 410   if (n >= MAX_AVISTREAMS || This->dwMoviChunkPos != 0) {
 411     /* already reached max nr of streams
 412      * or have already written frames to disk */
 413     return AVIERR_UNSUPPORTED;
 414   }
 415
 416   /* check AVISTREAMINFO for some really needed things */
 417   if (asi->fccType == 0 || asi->dwScale == 0 || asi->dwRate == 0)
 418     return AVIERR_BADFORMAT;
 419
 420   /* now it seems to be save to add the stream */
 421   assert(This->ppStreams[n] == NULL);
 422   This->ppStreams[n] = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
 423                                                    sizeof(IAVIStreamImpl));
 424   if (This->ppStreams[n] == NULL)
 425     return AVIERR_MEMORY;
 426
 427   /* initialize the new allocated stream */
 428   AVIFILE_ConstructAVIStream(This, n, asi);
 429
 430   This->fInfo.dwStreams++;
 431   This->fDirty = TRUE;
 432
 433   /* update our AVIFILEINFO structure */
 434   AVIFILE_UpdateInfo(This);
 435
 436   /* return it */
 437   *avis = (PAVISTREAM)This->ppStreams[n];
 438   IAVIStream_AddRef(*avis);
 439
 440   return AVIERR_OK;
 441 }
 442
 443 static HRESULT WINAPI IAVIFile_fnWriteData(IAVIFile *iface, DWORD ckid,
 444                                            LPVOID lpData, LONG size)
 445 {
 446   IAVIFileImpl *This = (IAVIFileImpl *)iface;
 447
 448   TRACE("(%p,0x%08X,%p,%d)\n", iface, ckid, lpData, size);
 449
 450   /* check parameters */
 451   if (lpData == NULL)
 452     return AVIERR_BADPARAM;
 453   if (size < 0)
 454     return AVIERR_BADSIZE;
 455
 456   /* Do we have write permission? */
 457   if ((This->uMode & MMIO_RWMODE) == 0)
 458     return AVIERR_READONLY;
 459
 460   This->fDirty = TRUE;
 461
 462   return WriteExtraChunk(&This->fileextra, ckid, lpData, size);
 463 }
 464
 465 static HRESULT WINAPI IAVIFile_fnReadData(IAVIFile *iface, DWORD ckid,
 466                                           LPVOID lpData, LONG *size)
 467 {
 468   IAVIFileImpl *This = (IAVIFileImpl *)iface;
 469
 470   TRACE("(%p,0x%08X,%p,%p)\n", iface, ckid, lpData, size);
 471
 472   return ReadExtraChunk(&This->fileextra, ckid, lpData, size);
 473 }
 474
 475 static HRESULT WINAPI IAVIFile_fnEndRecord(IAVIFile *iface)
 476 {
 477   IAVIFileImpl *This = (IAVIFileImpl *)iface;
 478
 479   TRACE("(%p)\n",iface);
 480
 481   if ((This->uMode & MMIO_RWMODE) == 0)
 482     return AVIERR_READONLY;
 483
 484   This->fDirty = TRUE;
 485
 486   /* no frames written to any stream? -- compute start of 'movi'-chunk */
 487   if (This->dwMoviChunkPos == 0)
 488     AVIFILE_ComputeMoviStart(This);
 489
 490   This->fInfo.dwFlags  |= AVIFILEINFO_ISINTERLEAVED;
 491
 492   /* already written frames to any stream, ... */
 493   if (This->ckLastRecord.dwFlags & MMIO_DIRTY) {
 494     /* close last record */
 495     if (mmioAscend(This->hmmio, &This->ckLastRecord, 0) != 0)
 496       return AVIERR_FILEWRITE;
 497
 498     AVIFILE_AddRecord(This);
 499
 500     if (This->fInfo.dwSuggestedBufferSize < This->ckLastRecord.cksize + 3 * sizeof(DWORD))
 501       This->fInfo.dwSuggestedBufferSize = This->ckLastRecord.cksize + 3 * sizeof(DWORD);
 502   }
 503
 504   /* write out a new record into file, but don't close it */
 505   This->ckLastRecord.cksize  = 0;
 506   This->ckLastRecord.fccType = listtypeAVIRECORD;
 507   if (mmioSeek(This->hmmio, This->dwNextFramePos, SEEK_SET) == -1)
 508     return AVIERR_FILEWRITE;
 509   if (mmioCreateChunk(This->hmmio, &This->ckLastRecord, MMIO_CREATELIST) != 0)
 510     return AVIERR_FILEWRITE;
 511   This->dwNextFramePos += 3 * sizeof(DWORD);
 512
 513   return AVIERR_OK;
 514 }
 515
 516 static HRESULT WINAPI IAVIFile_fnDeleteStream(IAVIFile *iface, DWORD fccType,
 517                                               LONG lParam)
 518 {
 519   IAVIFileImpl *This = (IAVIFileImpl *)iface;
 520
 521   ULONG nStream;
 522
 523   TRACE("(%p,0x%08X,%d)\n", iface, fccType, lParam);
 524
 525   /* check parameter */
 526   if (lParam < 0)
 527     return AVIERR_BADPARAM;
 528
 529   /* Have user write permissions? */
 530   if ((This->uMode & MMIO_RWMODE) == 0)
 531     return AVIERR_READONLY;
 532
 533   nStream = AVIFILE_SearchStream(This, fccType, lParam);
 534
 535   /* Does the requested stream exist? */
 536   if (nStream < This->fInfo.dwStreams &&
 537       This->ppStreams[nStream] != NULL) {
 538     /* ... so delete it now */
 539     HeapFree(GetProcessHeap(), 0, This->ppStreams[nStream]);
 540
 541     if (This->fInfo.dwStreams - nStream > 0)
 542       memcpy(This->ppStreams + nStream, This->ppStreams + nStream + 1,
 543              (This->fInfo.dwStreams - nStream) * sizeof(IAVIStreamImpl*));
 544
 545     This->ppStreams[This->fInfo.dwStreams] = NULL;
 546     This->fInfo.dwStreams--;
 547     This->fDirty = TRUE;
 548
 549     /* This->fInfo will be updated further when asked for */
 550     return AVIERR_OK;
 551   } else
 552     return AVIERR_NODATA;
 553 }
 554
 555 /***********************************************************************/
 556
 557 static HRESULT WINAPI IPersistFile_fnQueryInterface(IPersistFile *iface,
 558                                                     REFIID refiid, LPVOID *obj)
 559 {
 560   IPersistFileImpl *This = (IPersistFileImpl *)iface;
 561
 562   assert(This->paf != NULL);
 563
 564   return IAVIFile_QueryInterface((PAVIFILE)This->paf, refiid, obj);
 565 }
 566
 567 static ULONG   WINAPI IPersistFile_fnAddRef(IPersistFile *iface)
 568 {
 569   IPersistFileImpl *This = (IPersistFileImpl *)iface;
 570
 571   assert(This->paf != NULL);
 572
 573   return IAVIFile_AddRef((PAVIFILE)This->paf);
 574 }
 575
 576 static ULONG   WINAPI IPersistFile_fnRelease(IPersistFile *iface)
 577 {
 578   IPersistFileImpl *This = (IPersistFileImpl *)iface;
 579
 580   assert(This->paf != NULL);
 581
 582   return IAVIFile_Release((PAVIFILE)This->paf);
 583 }
 584
 585 static HRESULT WINAPI IPersistFile_fnGetClassID(IPersistFile *iface,
 586                                                 LPCLSID pClassID)
 587 {
 588   TRACE("(%p,%p)\n", iface, pClassID);
 589
 590   if (pClassID == NULL)
 591     return AVIERR_BADPARAM;
 592
 593   memcpy(pClassID, &CLSID_AVIFile, sizeof(CLSID_AVIFile));
 594
 595   return AVIERR_OK;
 596 }
 597
 598 static HRESULT WINAPI IPersistFile_fnIsDirty(IPersistFile *iface)
 599 {
 600   IPersistFileImpl *This = (IPersistFileImpl *)iface;
 601
 602   TRACE("(%p)\n", iface);
 603
 604   assert(This->paf != NULL);
 605
 606   return (This->paf->fDirty ? S_OK : S_FALSE);
 607 }
 608
 609 static HRESULT WINAPI IPersistFile_fnLoad(IPersistFile *iface,
 610                                           LPCOLESTR pszFileName, DWORD dwMode)
 611 {
 612   IPersistFileImpl *This = (IPersistFileImpl *)iface;
 613
 614   int len;
 615
 616   TRACE("(%p,%s,0x%08X)\n", iface, debugstr_w(pszFileName), dwMode);
 617
 618   /* check parameter */
 619   if (pszFileName == NULL)
 620     return AVIERR_BADPARAM;
 621
 622   assert(This->paf != NULL);
 623   if (This->paf->hmmio != NULL)
 624     return AVIERR_ERROR; /* No reuse of this object for another file! */
 625
 626   /* remeber mode and name */
 627   This->paf->uMode = dwMode;
 628
 629   len = lstrlenW(pszFileName) + 1;
 630   This->paf->szFileName = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
 631   if (This->paf->szFileName == NULL)
 632     return AVIERR_MEMORY;
 633   lstrcpyW(This->paf->szFileName, pszFileName);
 634
 635   /* try to open the file */
 636   This->paf->hmmio = mmioOpenW(This->paf->szFileName, NULL,
 637                                MMIO_ALLOCBUF | dwMode);
 638   if (This->paf->hmmio == NULL) {
 639     /* mmioOpenW not in native DLLs of Win9x -- try mmioOpenA */
 640     LPSTR szFileName;
 641
 642     len = WideCharToMultiByte(CP_ACP, 0, This->paf->szFileName, -1,
 643                                NULL, 0, NULL, NULL);
 644     szFileName = HeapAlloc(GetProcessHeap(), 0, len * sizeof(CHAR));
 645     if (szFileName == NULL)
 646       return AVIERR_MEMORY;
 647
 648     WideCharToMultiByte(CP_ACP, 0, This->paf->szFileName, -1, szFileName,
 649                         len, NULL, NULL);
 650
 651     This->paf->hmmio = mmioOpenA(szFileName, NULL, MMIO_ALLOCBUF | dwMode);
 652     HeapFree(GetProcessHeap(), 0, szFileName);
 653     if (This->paf->hmmio == NULL)
 654       return AVIERR_FILEOPEN;
 655   }
 656
 657   /* should we create a new file? */
 658   if (dwMode & OF_CREATE) {
 659     memset(& This->paf->fInfo, 0, sizeof(This->paf->fInfo));
 660     This->paf->fInfo.dwFlags = AVIFILEINFO_HASINDEX | AVIFILEINFO_TRUSTCKTYPE;
 661
 662     return AVIERR_OK;
 663   } else
 664     return AVIFILE_LoadFile(This->paf);
 665 }
 666
 667 static HRESULT WINAPI IPersistFile_fnSave(IPersistFile *iface,
 668                                           LPCOLESTR pszFileName,BOOL fRemember)
 669 {
 670   TRACE("(%p,%s,%d)\n", iface, debugstr_w(pszFileName), fRemember);
 671
 672   /* We write directly to disk, so nothing to do. */
 673
 674   return AVIERR_OK;
 675 }
 676
 677 static HRESULT WINAPI IPersistFile_fnSaveCompleted(IPersistFile *iface,
 678                                                    LPCOLESTR pszFileName)
 679 {
 680   TRACE("(%p,%s)\n", iface, debugstr_w(pszFileName));
 681
 682   /* We write directly to disk, so nothing to do. */
 683
 684   return AVIERR_OK;
 685 }
 686
 687 static HRESULT WINAPI IPersistFile_fnGetCurFile(IPersistFile *iface,
 688                                                 LPOLESTR *ppszFileName)
 689 {
 690   IPersistFileImpl *This = (IPersistFileImpl *)iface;
 691
 692   TRACE("(%p,%p)\n", iface, ppszFileName);
 693
 694   if (ppszFileName == NULL)
 695     return AVIERR_BADPARAM;
 696
 697   *ppszFileName = NULL;
 698
 699   assert(This->paf != NULL);
 700
 701   if (This->paf->szFileName != NULL) {
 702     int len = lstrlenW(This->paf->szFileName) + 1;
 703
 704     *ppszFileName = CoTaskMemAlloc(len * sizeof(WCHAR));
 705     if (*ppszFileName == NULL)
 706       return AVIERR_MEMORY;
 707
 708     strcpyW(*ppszFileName, This->paf->szFileName);
 709   }
 710
 711   return AVIERR_OK;
 712 }
 713
 714 /***********************************************************************/
 715
 716 static HRESULT WINAPI IAVIStream_fnQueryInterface(IAVIStream *iface,
 717                                                   REFIID refiid, LPVOID *obj)
 718 {
 719   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 720
 721   TRACE("(%p,%s,%p)\n", iface, debugstr_guid(refiid), obj);
 722
 723   if (IsEqualGUID(&IID_IUnknown, refiid) ||
 724       IsEqualGUID(&IID_IAVIStream, refiid)) {
 725     *obj = This;
 726     IAVIStream_AddRef(iface);
 727
 728     return S_OK;
 729   }
 730   /* FIXME: IAVIStreaming interface */
 731
 732   return OLE_E_ENUM_NOMORE;
 733 }
 734
 735 static ULONG WINAPI IAVIStream_fnAddRef(IAVIStream *iface)
 736 {
 737   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 738   ULONG ref = InterlockedIncrement(&This->ref);
 739
 740   TRACE("(%p) -> %d\n", iface, ref);
 741
 742   /* also add ref to parent, so that it doesn't kill us */
 743   if (This->paf != NULL)
 744     IAVIFile_AddRef((PAVIFILE)This->paf);
 745
 746   return ref;
 747 }
 748
 749 static ULONG WINAPI IAVIStream_fnRelease(IAVIStream* iface)
 750 {
 751   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 752   ULONG ref = InterlockedDecrement(&This->ref);
 753
 754   TRACE("(%p) -> %d\n", iface, ref);
 755
 756   if (This->paf != NULL)
 757     IAVIFile_Release((PAVIFILE)This->paf);
 758
 759   return ref;
 760 }
 761
 762 static HRESULT WINAPI IAVIStream_fnCreate(IAVIStream *iface, LPARAM lParam1,
 763                                           LPARAM lParam2)
 764 {
 765   TRACE("(%p,0x%08lX,0x%08lX)\n", iface, lParam1, lParam2);
 766
 767   /* This IAVIStream interface needs an AVIFile */
 768   return AVIERR_UNSUPPORTED;
 769 }
 770
 771 static HRESULT WINAPI IAVIStream_fnInfo(IAVIStream *iface,LPAVISTREAMINFOW psi,
 772                                         LONG size)
 773 {
 774   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 775
 776   TRACE("(%p,%p,%d)\n", iface, psi, size);
 777
 778   if (psi == NULL)
 779     return AVIERR_BADPARAM;
 780   if (size < 0)
 781     return AVIERR_BADSIZE;
 782
 783   memcpy(psi, &This->sInfo, min((DWORD)size, sizeof(This->sInfo)));
 784
 785   if ((DWORD)size < sizeof(This->sInfo))
 786     return AVIERR_BUFFERTOOSMALL;
 787   return AVIERR_OK;
 788 }
 789
 790 static LONG WINAPI IAVIStream_fnFindSample(IAVIStream *iface, LONG pos,
 791                                            LONG flags)
 792 {
 793   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 794
 795   LONG offset = 0;
 796
 797   TRACE("(%p,%d,0x%08X)\n",iface,pos,flags);
 798
 799   if (flags & FIND_FROM_START) {
 800     pos = This->sInfo.dwStart;
 801     flags &= ~(FIND_FROM_START|FIND_PREV);
 802     flags |= FIND_NEXT;
 803   }
 804
 805   if (This->sInfo.dwSampleSize != 0) {
 806     /* convert samples into block number with offset */
 807     AVIFILE_SamplesToBlock(This, &pos, &offset);
 808   }
 809
 810   if (flags & FIND_TYPE) {
 811     if (flags & FIND_KEY) {
 812       while (0 <= pos && pos <= This->lLastFrame) {
 813         if (This->idxFrames[pos].dwFlags & AVIIF_KEYFRAME)
 814           goto RETURN_FOUND;
 815
 816         if (flags & FIND_NEXT)
 817           pos++;
 818         else
 819           pos--;
 820       };
 821     } else if (flags & FIND_ANY) {
 822       while (0 <= pos && pos <= This->lLastFrame) {
 823         if (This->idxFrames[pos].dwChunkLength > 0)
 824           goto RETURN_FOUND;
 825
 826         if (flags & FIND_NEXT)
 827           pos++;
 828         else
 829           pos--;
 830
 831       };
 832     } else if ((flags & FIND_FORMAT) && This->idxFmtChanges != NULL &&
 833                This->sInfo.fccType == streamtypeVIDEO) {
 834       if (flags & FIND_NEXT) {
 835         ULONG n;
 836
 837         for (n = 0; n < This->sInfo.dwFormatChangeCount; n++)
 838           if (This->idxFmtChanges[n].ckid >= pos) {
 839             pos = This->idxFmtChanges[n].ckid;
 840             goto RETURN_FOUND;
 841           }
 842       } else {
 843         LONG n;
 844
 845         for (n = (LONG)This->sInfo.dwFormatChangeCount; n >= 0; n--) {
 846           if (This->idxFmtChanges[n].ckid <= pos) {
 847             pos = This->idxFmtChanges[n].ckid;
 848             goto RETURN_FOUND;
 849           }
 850         }
 851
 852         if (pos > (LONG)This->sInfo.dwStart)
 853           return 0; /* format changes always for first frame */
 854       }
 855     }
 856
 857     return -1;
 858   }
 859
 860  RETURN_FOUND:
 861   if (pos < (LONG)This->sInfo.dwStart)
 862     return -1;
 863
 864   switch (flags & FIND_RET) {
 865   case FIND_LENGTH:
 866     /* physical size */
 867     pos = This->idxFrames[pos].dwChunkLength;
 868     break;
 869   case FIND_OFFSET:
 870     /* physical position */
 871     pos = This->idxFrames[pos].dwChunkOffset + 2 * sizeof(DWORD)
 872       + offset * This->sInfo.dwSampleSize;
 873     break;
 874   case FIND_SIZE:
 875     /* logical size */
 876     if (This->sInfo.dwSampleSize)
 877       pos = This->sInfo.dwSampleSize;
 878     else
 879       pos = 1;
 880     break;
 881   case FIND_INDEX:
 882     FIXME(": FIND_INDEX flag is not supported!\n");
 883     /* This is an index in the index-table on disc. */
 884     break;
 885   }; /* else logical position */
 886
 887   return pos;
 888 }
 889
 890 static HRESULT WINAPI IAVIStream_fnReadFormat(IAVIStream *iface, LONG pos,
 891                                               LPVOID format, LONG *formatsize)
 892 {
 893   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 894
 895   TRACE("(%p,%d,%p,%p)\n", iface, pos, format, formatsize);
 896
 897   if (formatsize == NULL)
 898     return AVIERR_BADPARAM;
 899
 900   /* only interested in needed buffersize? */
 901   if (format == NULL || *formatsize <= 0) {
 902     *formatsize = This->cbFormat;
 903
 904     return AVIERR_OK;
 905   }
 906
 907   /* copy initial format (only as much as will fit) */
 908   memcpy(format, This->lpFormat, min(*(DWORD*)formatsize, This->cbFormat));
 909   if (*(DWORD*)formatsize < This->cbFormat) {
 910     *formatsize = This->cbFormat;
 911     return AVIERR_BUFFERTOOSMALL;
 912   }
 913
 914   /* Could format change? When yes will it change? */
 915   if ((This->sInfo.dwFlags & AVISTREAMINFO_FORMATCHANGES) &&
 916       pos > This->sInfo.dwStart) {
 917     LONG lLastFmt;
 918
 919     lLastFmt = IAVIStream_fnFindSample(iface, pos, FIND_FORMAT|FIND_PREV);
 920     if (lLastFmt > 0) {
 921       FIXME(": need to read formatchange for %d -- unimplemented!\n",lLastFmt);
 922     }
 923   }
 924
 925   *formatsize = This->cbFormat;
 926   return AVIERR_OK;
 927 }
 928
 929 static HRESULT WINAPI IAVIStream_fnSetFormat(IAVIStream *iface, LONG pos,
 930                                              LPVOID format, LONG formatsize)
 931 {
 932   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 933
 934   LPBITMAPINFOHEADER lpbiNew = (LPBITMAPINFOHEADER)format;
 935
 936   TRACE("(%p,%d,%p,%d)\n", iface, pos, format, formatsize);
 937
 938   /* check parameters */
 939   if (format == NULL || formatsize <= 0)
 940     return AVIERR_BADPARAM;
 941
 942   /* Do we have write permission? */
 943   if ((This->paf->uMode & MMIO_RWMODE) == 0)
 944     return AVIERR_READONLY;
 945
 946   /* can only set format before frame is written! */
 947   if (This->lLastFrame > pos)
 948     return AVIERR_UNSUPPORTED;
 949
 950   /* initial format or a formatchange? */
 951   if (This->lpFormat == NULL) {
 952     /* initial format */
 953     if (This->paf->dwMoviChunkPos != 0)
 954       return AVIERR_ERROR; /* user has used API in wrong sequnece! */
 955
 956     This->lpFormat = HeapAlloc(GetProcessHeap(), 0, formatsize);
 957     if (This->lpFormat == NULL)
 958       return AVIERR_MEMORY;
 959     This->cbFormat = formatsize;
 960
 961     memcpy(This->lpFormat, format, formatsize);
 962
 963     /* update some infos about stream */
 964     if (This->sInfo.fccType == streamtypeVIDEO) {
 965       LONG lDim;
 966
 967       lDim = This->sInfo.rcFrame.right - This->sInfo.rcFrame.left;
 968       if (lDim < lpbiNew->biWidth)
 969         This->sInfo.rcFrame.right = This->sInfo.rcFrame.left + lpbiNew->biWidth;
 970       lDim = This->sInfo.rcFrame.bottom - This->sInfo.rcFrame.top;
 971       if (lDim < lpbiNew->biHeight)
 972         This->sInfo.rcFrame.bottom = This->sInfo.rcFrame.top + lpbiNew->biHeight;
 973     } else if (This->sInfo.fccType == streamtypeAUDIO)
 974       This->sInfo.dwSampleSize = ((LPWAVEFORMATEX)This->lpFormat)->nBlockAlign;
 975
 976     return AVIERR_OK;
 977   } else {
 978     MMCKINFO           ck;
 979     LPBITMAPINFOHEADER lpbiOld = (LPBITMAPINFOHEADER)This->lpFormat;
 980     RGBQUAD           *rgbNew  = (RGBQUAD*)((LPBYTE)lpbiNew + lpbiNew->biSize);
 981     AVIPALCHANGE      *lppc = NULL;
 982     UINT               n;
 983
 984     /* perhaps format change, check it ... */
 985     if (This->cbFormat != formatsize)
 986       return AVIERR_UNSUPPORTED;
 987
 988     /* no format change, only the initial one */
 989     if (memcmp(This->lpFormat, format, formatsize) == 0)
 990       return AVIERR_OK;
 991
 992     /* check that's only the palette, which changes */
 993     if (lpbiOld->biSize        != lpbiNew->biSize ||
 994         lpbiOld->biWidth       != lpbiNew->biWidth ||
 995         lpbiOld->biHeight      != lpbiNew->biHeight ||
 996         lpbiOld->biPlanes      != lpbiNew->biPlanes ||
 997         lpbiOld->biBitCount    != lpbiNew->biBitCount ||
 998         lpbiOld->biCompression != lpbiNew->biCompression ||
 999         lpbiOld->biClrUsed     != lpbiNew->biClrUsed)
1000       return AVIERR_UNSUPPORTED;
1001
1002     This->sInfo.dwFlags |= AVISTREAMINFO_FORMATCHANGES;
1003
1004     /* simply say all colors have changed */
1005     ck.ckid   = MAKEAVICKID(cktypePALchange, This->nStream);
1006     ck.cksize = 2 * sizeof(WORD) + lpbiOld->biClrUsed * sizeof(PALETTEENTRY);
1007     lppc = HeapAlloc(GetProcessHeap(), 0, ck.cksize);
1008     if (lppc == NULL)
1009       return AVIERR_MEMORY;
1010
1011     lppc->bFirstEntry = 0;
1012     lppc->bNumEntries = (lpbiOld->biClrUsed < 256 ? lpbiOld->biClrUsed : 0);
1013     lppc->wFlags      = 0;
1014     for (n = 0; n < lpbiOld->biClrUsed; n++) {
1015       lppc->peNew[n].peRed   = rgbNew[n].rgbRed;
1016       lppc->peNew[n].peGreen = rgbNew[n].rgbGreen;
1017       lppc->peNew[n].peBlue  = rgbNew[n].rgbBlue;
1018       lppc->peNew[n].peFlags = 0;
1019     }
1020
1021     if (mmioSeek(This->paf->hmmio, This->paf->dwNextFramePos, SEEK_SET) == -1)
1022       return AVIERR_FILEWRITE;
1023     if (mmioCreateChunk(This->paf->hmmio, &ck, 0) != S_OK)
1024       return AVIERR_FILEWRITE;
1025     if (mmioWrite(This->paf->hmmio, (HPSTR)lppc, ck.cksize) != ck.cksize)
1026       return AVIERR_FILEWRITE;
1027     if (mmioAscend(This->paf->hmmio, &ck, 0) != S_OK)
1028       return AVIERR_FILEWRITE;
1029     This->paf->dwNextFramePos += ck.cksize + 2 * sizeof(DWORD);
1030
1031     HeapFree(GetProcessHeap(), 0, lppc);
1032
1033     return AVIFILE_AddFrame(This, cktypePALchange, n, ck.dwDataOffset, 0);
1034   }
1035 }
1036
1037 static HRESULT WINAPI IAVIStream_fnRead(IAVIStream *iface, LONG start,
1038                                         LONG samples, LPVOID buffer,
1039                                         LONG buffersize, LPLONG bytesread,
1040                                         LPLONG samplesread)
1041 {
1042   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
1043
1044   DWORD    size;
1045   HRESULT  hr;
1046
1047   TRACE("(%p,%d,%d,%p,%d,%p,%p)\n", iface, start, samples, buffer,
1048         buffersize, bytesread, samplesread);
1049
1050   /* clear return parameters if given */
1051   if (bytesread != NULL)
1052     *bytesread = 0;
1053   if (samplesread != NULL)
1054     *samplesread = 0;
1055
1056   /* check parameters */
1057   if ((LONG)This->sInfo.dwStart > start)
1058     return AVIERR_NODATA; /* couldn't read before start of stream */
1059   if (This->sInfo.dwStart + This->sInfo.dwLength < (DWORD)start)
1060     return AVIERR_NODATA; /* start is past end of stream */
1061
1062   /* should we read as much as possible? */
1063   if (samples == -1) {
1064     /* User should know how much we have read */
1065     if (bytesread == NULL && samplesread == NULL)
1066       return AVIERR_BADPARAM;
1067
1068     if (This->sInfo.dwSampleSize != 0)
1069       samples = buffersize / This->sInfo.dwSampleSize;
1070     else
1071       samples = 1;
1072   }
1073
1074   /* limit to end of stream */
1075   if ((LONG)This->sInfo.dwLength < samples)
1076     samples = This->sInfo.dwLength;
1077   if ((start - This->sInfo.dwStart) > (This->sInfo.dwLength - samples))
1078     samples = This->sInfo.dwLength - (start - This->sInfo.dwStart);
1079
1080   /* nothing to read? Then leave ... */
1081   if (samples == 0)
1082     return AVIERR_OK;
1083
1084   if (This->sInfo.dwSampleSize != 0) {
1085     /* fixed samplesize -- we can read over frame/block boundaries */
1086     LONG block = start;
1087     LONG offset = 0;
1088
1089     /* convert start sample to block,offset pair */
1090     AVIFILE_SamplesToBlock(This, &block, &offset);
1091
1092     /* convert samples to bytes */
1093     samples *= This->sInfo.dwSampleSize;
1094
1095     while (samples > 0 && buffersize > 0) {
1096       if (block != This->dwCurrentFrame) {
1097         hr = AVIFILE_ReadBlock(This, block, NULL, 0);
1098         if (FAILED(hr))
1099           return hr;
1100       }
1101
1102       size = min((DWORD)samples, (DWORD)buffersize);
1103       size = min(size, This->cbBuffer - offset);
1104       memcpy(buffer, ((BYTE*)&This->lpBuffer[2]) + offset, size);
1105
1106       block++;
1107       offset = 0;
1108       buffer = ((LPBYTE)buffer)+size;
1109       samples    -= size;
1110       buffersize -= size;
1111
1112       /* fill out return parameters if given */
1113       if (bytesread != NULL)
1114         *bytesread   += size;
1115       if (samplesread != NULL)
1116         *samplesread += size / This->sInfo.dwSampleSize;
1117     }
1118
1119     if (samples == 0)
1120       return AVIERR_OK;
1121     else
1122       return AVIERR_BUFFERTOOSMALL;
1123   } else {
1124     /* variable samplesize -- we can only read one full frame/block */
1125     if (samples > 1)
1126       samples = 1;
1127
1128     assert(start <= This->lLastFrame);
1129     size = This->idxFrames[start].dwChunkLength;
1130     if (buffer != NULL && buffersize >= size) {
1131       hr = AVIFILE_ReadBlock(This, start, buffer, size);
1132       if (FAILED(hr))
1133         return hr;
1134     } else if (buffer != NULL)
1135       return AVIERR_BUFFERTOOSMALL;
1136
1137     /* fill out return parameters if given */
1138     if (bytesread != NULL)
1139       *bytesread = size;
1140     if (samplesread != NULL)
1141       *samplesread = samples;
1142
1143     return AVIERR_OK;
1144   }
1145 }
1146
1147 static HRESULT WINAPI IAVIStream_fnWrite(IAVIStream *iface, LONG start,
1148                                          LONG samples, LPVOID buffer,
1149                                          LONG buffersize, DWORD flags,
1150                                          LPLONG sampwritten,
1151                                          LPLONG byteswritten)
1152 {
1153   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
1154
1155   FOURCC  ckid;
1156   HRESULT hr;
1157
1158   TRACE("(%p,%d,%d,%p,%d,0x%08X,%p,%p)\n", iface, start, samples,
1159         buffer, buffersize, flags, sampwritten, byteswritten);
1160
1161   /* clear return parameters if given */
1162   if (sampwritten != NULL)
1163     *sampwritten = 0;
1164   if (byteswritten != NULL)
1165     *byteswritten = 0;
1166
1167   /* check parameters */
1168   if (buffer == NULL && (buffersize > 0 || samples > 0))
1169     return AVIERR_BADPARAM;
1170
1171   /* Have we write permission? */
1172   if ((This->paf->uMode & MMIO_RWMODE) == 0)
1173     return AVIERR_READONLY;
1174
1175   switch (This->sInfo.fccType) {
1176   case streamtypeAUDIO:
1177     ckid = MAKEAVICKID(cktypeWAVEbytes, This->nStream);
1178     break;
1179   default:
1180     if ((flags & AVIIF_KEYFRAME) && buffersize != 0)
1181       ckid = MAKEAVICKID(cktypeDIBbits, This->nStream);
1182     else
1183       ckid = MAKEAVICKID(cktypeDIBcompressed, This->nStream);
1184     break;
1185   };
1186
1187   /* append to end of stream? */
1188   if (start == -1) {
1189     if (This->lLastFrame == -1)
1190       start = This->sInfo.dwStart;
1191     else
1192       start = This->sInfo.dwLength;
1193   } else if (This->lLastFrame == -1)
1194     This->sInfo.dwStart = start;
1195
1196   if (This->sInfo.dwSampleSize != 0) {
1197     /* fixed sample size -- audio like */
1198     if (samples * This->sInfo.dwSampleSize != buffersize)
1199       return AVIERR_BADPARAM;
1200
1201     /* Couldn't skip audio-like data -- User must supply appropriate silence */
1202     if (This->sInfo.dwLength != start)
1203       return AVIERR_UNSUPPORTED;
1204
1205     /* Convert position to frame/block */
1206     start = This->lLastFrame + 1;
1207
1208     if ((This->paf->fInfo.dwFlags & AVIFILEINFO_ISINTERLEAVED) == 0) {
1209       FIXME(": not interleaved, could collect audio data!\n");
1210     }
1211   } else {
1212     /* variable sample size -- video like */
1213     if (samples > 1)
1214       return AVIERR_UNSUPPORTED;
1215
1216     /* must we fill up with empty frames? */
1217     if (This->lLastFrame != -1) {
1218       FOURCC ckid2 = MAKEAVICKID(cktypeDIBcompressed, This->nStream);
1219
1220       while (start > This->lLastFrame + 1) {
1221         hr = AVIFILE_WriteBlock(This, This->lLastFrame + 1, ckid2, 0, NULL, 0);
1222         if (FAILED(hr))
1223           return hr;
1224       }
1225     }
1226   }
1227
1228   /* write the block now */
1229   hr = AVIFILE_WriteBlock(This, start, ckid, flags, buffer, buffersize);
1230   if (SUCCEEDED(hr)) {
1231     /* fill out return parameters if given */
1232     if (sampwritten != NULL)
1233       *sampwritten = samples;
1234     if (byteswritten != NULL)
1235       *byteswritten = buffersize;
1236   }
1237
1238   return hr;
1239 }
1240
1241 static HRESULT WINAPI IAVIStream_fnDelete(IAVIStream *iface, LONG start,
1242                                           LONG samples)
1243 {
1244   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
1245
1246   FIXME("(%p,%d,%d): stub\n", iface, start, samples);
1247
1248   /* check parameters */
1249   if (start < 0 || samples < 0)
1250     return AVIERR_BADPARAM;
1251
1252   /* Delete before start of stream? */
1253   if (start + samples < This->sInfo.dwStart)
1254     return AVIERR_OK;
1255
1256   /* Delete after end of stream? */
1257   if (start > This->sInfo.dwLength)
1258     return AVIERR_OK;
1259
1260   /* For the rest we need write permissions */
1261   if ((This->paf->uMode & MMIO_RWMODE) == 0)
1262     return AVIERR_READONLY;
1263
1264   /* 1. overwrite the data with JUNK
1265    *
1266    * if ISINTERLEAVED {
1267    *   2. concat all neighboured JUNK-blocks in this record to one
1268    *   3. if this record only contains JUNK and is at end set dwNextFramePos
1269    *      to start of this record, repeat this.
1270    * } else {
1271    *   2. concat all neighboured JUNK-blocks.
1272    *   3. if the JUNK block is at the end, then set dwNextFramePos to
1273    *      start of this block.
1274    * }
1275    */
1276
1277   return AVIERR_UNSUPPORTED;
1278 }
1279
1280 static HRESULT WINAPI IAVIStream_fnReadData(IAVIStream *iface, DWORD fcc,
1281                                             LPVOID lp, LPLONG lpread)
1282 {
1283   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
1284
1285   TRACE("(%p,0x%08X,%p,%p)\n", iface, fcc, lp, lpread);
1286
1287   if (fcc == ckidSTREAMHANDLERDATA) {
1288     if (This->lpHandlerData != NULL && This->cbHandlerData > 0) {
1289       if (lp == NULL || *lpread <= 0) {
1290         *lpread = This->cbHandlerData;
1291         return AVIERR_OK;
1292       }
1293
1294       memcpy(lp, This->lpHandlerData, min(This->cbHandlerData, *lpread));
1295       if (*lpread < This->cbHandlerData)
1296         return AVIERR_BUFFERTOOSMALL;
1297       return AVIERR_OK;
1298     } else
1299       return AVIERR_NODATA;
1300   } else
1301     return ReadExtraChunk(&This->extra, fcc, lp, lpread);
1302 }
1303
1304 static HRESULT WINAPI IAVIStream_fnWriteData(IAVIStream *iface, DWORD fcc,
1305                                              LPVOID lp, LONG size)
1306 {
1307   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
1308
1309   TRACE("(%p,0x%08x,%p,%d)\n", iface, fcc, lp, size);
1310
1311   /* check parameters */
1312   if (lp == NULL)
1313     return AVIERR_BADPARAM;
1314   if (size <= 0)
1315     return AVIERR_BADSIZE;
1316
1317   /* need write permission */
1318   if ((This->paf->uMode & MMIO_RWMODE) == 0)
1319     return AVIERR_READONLY;
1320
1321   /* already written something to this file? */
1322   if (This->paf->dwMoviChunkPos != 0) {
1323     /* the data will be inserted before the 'movi' chunk, so check for
1324      * enough space */
1325     DWORD dwPos = AVIFILE_ComputeMoviStart(This->paf);
1326
1327     /* ckid,size => 2 * sizeof(DWORD) */
1328     dwPos += 2 * sizeof(DWORD) + size;
1329     if (size >= This->paf->dwMoviChunkPos - 2 * sizeof(DWORD))
1330       return AVIERR_UNSUPPORTED; /* not enough space left */
1331   }
1332
1333   This->paf->fDirty = TRUE;
1334
1335   if (fcc == ckidSTREAMHANDLERDATA) {
1336     if (This->lpHandlerData != NULL) {
1337       FIXME(": handler data already set -- overwirte?\n");
1338       return AVIERR_UNSUPPORTED;
1339     }
1340
1341     This->lpHandlerData = HeapAlloc(GetProcessHeap(), 0, size);
1342     if (This->lpHandlerData == NULL)
1343       return AVIERR_MEMORY;
1344     This->cbHandlerData = size;
1345     memcpy(This->lpHandlerData, lp, size);
1346
1347     return AVIERR_OK;
1348   } else
1349     return WriteExtraChunk(&This->extra, fcc, lp, size);
1350 }
1351
1352 static HRESULT WINAPI IAVIStream_fnSetInfo(IAVIStream *iface,
1353                                            LPAVISTREAMINFOW info, LONG infolen)
1354 {
1355   FIXME("(%p,%p,%d): stub\n", iface, info, infolen);
1356
1357   return E_FAIL;
1358 }
1359
1360 /***********************************************************************/
1361
1362 static HRESULT AVIFILE_AddFrame(IAVIStreamImpl *This, DWORD ckid, DWORD size, DWORD offset, DWORD flags)
1363 {
1364   /* pre-conditions */
1365   assert(This != NULL);
1366
1367   switch (TWOCCFromFOURCC(ckid)) {
1368   case cktypeDIBbits:
1369     if (This->paf->fInfo.dwFlags & AVIFILEINFO_TRUSTCKTYPE)
1370       flags |= AVIIF_KEYFRAME;
1371     break;
1372   case cktypeDIBcompressed:
1373     if (This->paf->fInfo.dwFlags & AVIFILEINFO_TRUSTCKTYPE)
1374       flags &= ~AVIIF_KEYFRAME;
1375     break;
1376   case cktypePALchange:
1377     if (This->sInfo.fccType != streamtypeVIDEO) {
1378       ERR(": found palette change in non-video stream!\n");
1379       return AVIERR_BADFORMAT;
1380     }
1381     This->sInfo.dwFlags |= AVISTREAMINFO_FORMATCHANGES;
1382     This->sInfo.dwFormatChangeCount++;
1383
1384     if (This->idxFmtChanges == NULL || This->sInfo.dwFormatChangeCount < This->nIdxFmtChanges) {
1385       UINT n = This->sInfo.dwFormatChangeCount;
1386
1387       This->nIdxFmtChanges += 16;
1388       if (This->idxFmtChanges == NULL)
1389         This->idxFmtChanges =
1390           HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, This->nIdxFmtChanges * sizeof(AVIINDEXENTRY));
1391       else
1392         This->idxFmtChanges =
1393           HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, This->idxFmtChanges,
1394                            This->nIdxFmtChanges * sizeof(AVIINDEXENTRY));
1395       if (This->idxFmtChanges == NULL)
1396         return AVIERR_MEMORY;
1397
1398       This->idxFmtChanges[n].ckid          = This->lLastFrame;
1399       This->idxFmtChanges[n].dwFlags       = 0;
1400       This->idxFmtChanges[n].dwChunkOffset = offset;
1401       This->idxFmtChanges[n].dwChunkLength = size;
1402
1403       return AVIERR_OK;
1404     }
1405     break;
1406   case cktypeWAVEbytes:
1407     if (This->paf->fInfo.dwFlags & AVIFILEINFO_TRUSTCKTYPE)
1408       flags |= AVIIF_KEYFRAME;
1409     break;
1410   default:
1411     WARN(": unknown TWOCC 0x%04X found\n", TWOCCFromFOURCC(ckid));
1412     break;
1413   };
1414
1415   /* first frame is alwasy a keyframe */
1416   if (This->lLastFrame == -1)
1417     flags |= AVIIF_KEYFRAME;
1418
1419   if (This->sInfo.dwSuggestedBufferSize < size)
1420     This->sInfo.dwSuggestedBufferSize = size;
1421
1422   /* get memory for index */
1423   if (This->idxFrames == NULL || This->lLastFrame + 1 >= This->nIdxFrames) {
1424     This->nIdxFrames += 512;
1425     if (This->idxFrames == NULL)
1426       This->idxFrames = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, This->nIdxFrames * sizeof(AVIINDEXENTRY));
1427       else
1428         This->idxFrames = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, This->idxFrames,
1429                            This->nIdxFrames * sizeof(AVIINDEXENTRY));
1430     if (This->idxFrames == NULL)
1431       return AVIERR_MEMORY;
1432   }
1433
1434   This->lLastFrame++;
1435   This->idxFrames[This->lLastFrame].ckid          = ckid;
1436   This->idxFrames[This->lLastFrame].dwFlags       = flags;
1437   This->idxFrames[This->lLastFrame].dwChunkOffset = offset;
1438   This->idxFrames[This->lLastFrame].dwChunkLength = size;
1439
1440   /* update AVISTREAMINFO structure if necessary */
1441   if (This->sInfo.dwLength <= This->lLastFrame)
1442     This->sInfo.dwLength = This->lLastFrame + 1;
1443
1444   return AVIERR_OK;
1445 }
1446
1447 static HRESULT AVIFILE_AddRecord(IAVIFileImpl *This)
1448 {
1449   /* pre-conditions */
1450   assert(This != NULL && This->ppStreams[0] != NULL);
1451
1452   if (This->idxRecords == NULL || This->cbIdxRecords == 0) {
1453     This->cbIdxRecords += 1024 * sizeof(AVIINDEXENTRY);
1454     This->idxRecords = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, This->cbIdxRecords);
1455     if (This->idxRecords == NULL)
1456       return AVIERR_MEMORY;
1457   }
1458
1459   assert(This->nIdxRecords < This->cbIdxRecords/sizeof(AVIINDEXENTRY));
1460
1461   This->idxRecords[This->nIdxRecords].ckid          = listtypeAVIRECORD;
1462   This->idxRecords[This->nIdxRecords].dwFlags       = AVIIF_LIST;
1463   This->idxRecords[This->nIdxRecords].dwChunkOffset =
1464     This->ckLastRecord.dwDataOffset - 2 * sizeof(DWORD);
1465   This->idxRecords[This->nIdxRecords].dwChunkLength =
1466     This->ckLastRecord.cksize;
1467   This->nIdxRecords++;
1468
1469   return AVIERR_OK;
1470 }
1471
1472 static DWORD   AVIFILE_ComputeMoviStart(IAVIFileImpl *This)
1473 {
1474   DWORD dwPos;
1475   DWORD nStream;
1476
1477   /* RIFF,hdrl,movi,avih => (3 * 3 + 2) * sizeof(DWORD) = 11 * sizeof(DWORD) */
1478   dwPos = 11 * sizeof(DWORD) + sizeof(MainAVIHeader);
1479
1480   for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++) {
1481     IAVIStreamImpl *pStream = This->ppStreams[nStream];
1482
1483     /* strl,strh,strf => (3 + 2 * 2) * sizeof(DWORD) = 7 * sizeof(DWORD) */
1484     dwPos += 7 * sizeof(DWORD) + sizeof(AVIStreamHeader);
1485     dwPos += ((pStream->cbFormat + 1) & ~1U);
1486     if (pStream->lpHandlerData != NULL && pStream->cbHandlerData > 0)
1487       dwPos += 2 * sizeof(DWORD) + ((pStream->cbHandlerData + 1) & ~1U);
1488     if (lstrlenW(pStream->sInfo.szName) > 0)
1489       dwPos += 2 * sizeof(DWORD) + ((lstrlenW(pStream->sInfo.szName) + 1) & ~1U);
1490   }
1491
1492   if (This->dwMoviChunkPos == 0) {
1493     This->dwNextFramePos = dwPos;
1494
1495     /* pad to multiple of AVI_HEADERSIZE only if we are more than 8 bytes away from it */
1496     if (((dwPos + AVI_HEADERSIZE) & ~(AVI_HEADERSIZE - 1)) - dwPos > 2 * sizeof(DWORD))
1497       This->dwNextFramePos = (dwPos + AVI_HEADERSIZE) & ~(AVI_HEADERSIZE - 1);
1498
1499     This->dwMoviChunkPos = This->dwNextFramePos - sizeof(DWORD);
1500   }
1501
1502   return dwPos;
1503 }
1504
1505 static void    AVIFILE_ConstructAVIStream(IAVIFileImpl *paf, DWORD nr, LPAVISTREAMINFOW asi)
1506 {
1507   IAVIStreamImpl *pstream;
1508
1509   /* pre-conditions */
1510   assert(paf != NULL);
1511   assert(nr < MAX_AVISTREAMS);
1512   assert(paf->ppStreams[nr] != NULL);
1513
1514   pstream = paf->ppStreams[nr];
1515
1516   pstream->lpVtbl         = &iavist;
1517   pstream->ref            = 0;
1518   pstream->paf            = paf;
1519   pstream->nStream        = nr;
1520   pstream->dwCurrentFrame = (DWORD)-1;
1521   pstream->lLastFrame    = -1;
1522
1523   if (asi != NULL) {
1524     memcpy(&pstream->sInfo, asi, sizeof(pstream->sInfo));
1525
1526     if (asi->dwLength > 0) {
1527       /* pre-allocate mem for frame-index structure */
1528       pstream->idxFrames =
1529         HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, asi->dwLength * sizeof(AVIINDEXENTRY));
1530       if (pstream->idxFrames != NULL)
1531         pstream->nIdxFrames = asi->dwLength;
1532     }
1533     if (asi->dwFormatChangeCount > 0) {
1534       /* pre-allocate mem for formatchange-index structure */
1535       pstream->idxFmtChanges =
1536         HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, asi->dwFormatChangeCount * sizeof(AVIINDEXENTRY));
1537       if (pstream->idxFmtChanges != NULL)
1538         pstream->nIdxFmtChanges = asi->dwFormatChangeCount;
1539     }
1540
1541     /* These values will be computed */
1542     pstream->sInfo.dwLength              = 0;
1543     pstream->sInfo.dwSuggestedBufferSize = 0;
1544     pstream->sInfo.dwFormatChangeCount   = 0;
1545     pstream->sInfo.dwEditCount           = 1;
1546     if (pstream->sInfo.dwSampleSize > 0)
1547       SetRectEmpty(&pstream->sInfo.rcFrame);
1548   }
1549
1550   pstream->sInfo.dwCaps = AVIFILECAPS_CANREAD|AVIFILECAPS_CANWRITE;
1551 }
1552
1553 static void    AVIFILE_DestructAVIStream(IAVIStreamImpl *This)
1554 {
1555   /* pre-conditions */
1556   assert(This != NULL);
1557
1558   This->dwCurrentFrame = (DWORD)-1;
1559   This->lLastFrame    = -1;
1560   This->paf = NULL;
1561   if (This->idxFrames != NULL) {
1562     HeapFree(GetProcessHeap(), 0, This->idxFrames);
1563     This->idxFrames  = NULL;
1564     This->nIdxFrames = 0;
1565   }
1566   HeapFree(GetProcessHeap(), 0, This->idxFmtChanges);
1567   This->idxFmtChanges = NULL;
1568   if (This->lpBuffer != NULL) {
1569     HeapFree(GetProcessHeap(), 0, This->lpBuffer);
1570     This->lpBuffer = NULL;
1571     This->cbBuffer = 0;
1572   }
1573   if (This->lpHandlerData != NULL) {
1574     HeapFree(GetProcessHeap(), 0, This->lpHandlerData);
1575     This->lpHandlerData = NULL;
1576     This->cbHandlerData = 0;
1577   }
1578   if (This->extra.lp != NULL) {
1579     HeapFree(GetProcessHeap(), 0, This->extra.lp);
1580     This->extra.lp = NULL;
1581     This->extra.cb = 0;
1582   }
1583   if (This->lpFormat != NULL) {
1584     HeapFree(GetProcessHeap(), 0, This->lpFormat);
1585     This->lpFormat = NULL;
1586     This->cbFormat = 0;
1587   }
1588 }
1589
1590 static HRESULT AVIFILE_LoadFile(IAVIFileImpl *This)
1591 {
1592   MainAVIHeader   MainAVIHdr;
1593   MMCKINFO        ckRIFF;
1594   MMCKINFO        ckLIST1;
1595   MMCKINFO        ckLIST2;
1596   MMCKINFO        ck;
1597   IAVIStreamImpl *pStream;
1598   DWORD           nStream;
1599   HRESULT         hr;
1600
1601   if (This->hmmio == NULL)
1602     return AVIERR_FILEOPEN;
1603
1604   /* initialize stream ptr's */
1605   memset(This->ppStreams, 0, sizeof(This->ppStreams));
1606
1607   /* try to get "RIFF" chunk -- must not be at beginning of file! */
1608   ckRIFF.fccType = formtypeAVI;
1609   if (mmioDescend(This->hmmio, &ckRIFF, NULL, MMIO_FINDRIFF) != S_OK) {
1610     ERR(": not an AVI!\n");
1611     return AVIERR_FILEREAD;
1612   }
1613
1614   /* get "LIST" "hdrl" */
1615   ckLIST1.fccType = listtypeAVIHEADER;
1616   hr = FindChunkAndKeepExtras(&This->fileextra, This->hmmio, &ckLIST1, &ckRIFF, MMIO_FINDLIST);
1617   if (FAILED(hr))
1618     return hr;
1619
1620   /* get "avih" chunk */
1621   ck.ckid = ckidAVIMAINHDR;
1622   hr = FindChunkAndKeepExtras(&This->fileextra, This->hmmio, &ck, &ckLIST1, MMIO_FINDCHUNK);
1623   if (FAILED(hr))
1624     return hr;
1625
1626   if (ck.cksize != sizeof(MainAVIHdr)) {
1627     ERR(": invalid size of %d for MainAVIHeader!\n", ck.cksize);
1628     return AVIERR_BADFORMAT;
1629   }
1630   if (mmioRead(This->hmmio, (HPSTR)&MainAVIHdr, ck.cksize) != ck.cksize)
1631     return AVIERR_FILEREAD;
1632
1633   /* check for MAX_AVISTREAMS limit */
1634   if (MainAVIHdr.dwStreams > MAX_AVISTREAMS) {
1635     WARN("file contains %u streams, but only supports %d -- change MAX_AVISTREAMS!\n", MainAVIHdr.dwStreams, MAX_AVISTREAMS);
1636     return AVIERR_UNSUPPORTED;
1637   }
1638
1639   /* adjust permissions if copyrighted material in file */
1640   if (MainAVIHdr.dwFlags & AVIFILEINFO_COPYRIGHTED) {
1641     This->uMode &= ~MMIO_RWMODE;
1642     This->uMode |= MMIO_READ;
1643   }
1644
1645   /* convert MainAVIHeader into AVIFILINFOW */
1646   memset(&This->fInfo, 0, sizeof(This->fInfo));
1647   This->fInfo.dwRate                = MainAVIHdr.dwMicroSecPerFrame;
1648   This->fInfo.dwScale               = 1000000;
1649   This->fInfo.dwMaxBytesPerSec      = MainAVIHdr.dwMaxBytesPerSec;
1650   This->fInfo.dwFlags               = MainAVIHdr.dwFlags;
1651   This->fInfo.dwCaps                = AVIFILECAPS_CANREAD|AVIFILECAPS_CANWRITE;
1652   This->fInfo.dwLength              = MainAVIHdr.dwTotalFrames;
1653   This->fInfo.dwStreams             = MainAVIHdr.dwStreams;
1654   This->fInfo.dwSuggestedBufferSize = MainAVIHdr.dwSuggestedBufferSize;
1655   This->fInfo.dwWidth               = MainAVIHdr.dwWidth;
1656   This->fInfo.dwHeight              = MainAVIHdr.dwHeight;
1657   LoadStringW(AVIFILE_hModule, IDS_AVIFILETYPE, This->fInfo.szFileType,
1658               sizeof(This->fInfo.szFileType));
1659
1660   /* go back to into header list */
1661   if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
1662     return AVIERR_FILEREAD;
1663
1664   /* foreach stream exists a "LIST","strl" chunk */
1665   for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++) {
1666     /* get next nested chunk in this "LIST","strl" */
1667     if (mmioDescend(This->hmmio, &ckLIST2, &ckLIST1, 0) != S_OK)
1668       return AVIERR_FILEREAD;
1669
1670     /* nested chunk must be of type "LIST","strl" -- when not normally JUNK */
1671     if (ckLIST2.ckid == FOURCC_LIST &&
1672         ckLIST2.fccType == listtypeSTREAMHEADER) {
1673       pStream = This->ppStreams[nStream] =
1674         HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IAVIStreamImpl));
1675       if (pStream == NULL)
1676         return AVIERR_MEMORY;
1677       AVIFILE_ConstructAVIStream(This, nStream, NULL);
1678
1679       ck.ckid = 0;
1680       while (mmioDescend(This->hmmio, &ck, &ckLIST2, 0) == S_OK) {
1681         switch (ck.ckid) {
1682         case ckidSTREAMHANDLERDATA:
1683           if (pStream->lpHandlerData != NULL)
1684             return AVIERR_BADFORMAT;
1685           pStream->lpHandlerData = HeapAlloc(GetProcessHeap(), 0, ck.cksize);
1686           if (pStream->lpHandlerData == NULL)
1687             return AVIERR_MEMORY;
1688           pStream->cbHandlerData = ck.cksize;
1689
1690           if (mmioRead(This->hmmio, (HPSTR)pStream->lpHandlerData, ck.cksize) != ck.cksize)
1691             return AVIERR_FILEREAD;
1692           break;
1693         case ckidSTREAMFORMAT:
1694           if (pStream->lpFormat != NULL)
1695             return AVIERR_BADFORMAT;
1696           if (ck.cksize == 0)
1697             break;
1698
1699           pStream->lpFormat = HeapAlloc(GetProcessHeap(), 0, ck.cksize);
1700           if (pStream->lpFormat == NULL)
1701             return AVIERR_MEMORY;
1702           pStream->cbFormat = ck.cksize;
1703
1704           if (mmioRead(This->hmmio, (HPSTR)pStream->lpFormat, ck.cksize) != ck.cksize)
1705             return AVIERR_FILEREAD;
1706
1707           if (pStream->sInfo.fccType == streamtypeVIDEO) {
1708             LPBITMAPINFOHEADER lpbi = (LPBITMAPINFOHEADER)pStream->lpFormat;
1709
1710             /* some corrections to the video format */
1711             if (lpbi->biClrUsed == 0 && lpbi->biBitCount <= 8)
1712               lpbi->biClrUsed = 1u << lpbi->biBitCount;
1713             if (lpbi->biCompression == BI_RGB && lpbi->biSizeImage == 0)
1714               lpbi->biSizeImage = DIBWIDTHBYTES(*lpbi) * lpbi->biHeight;
1715             if (lpbi->biCompression != BI_RGB && lpbi->biBitCount == 8) {
1716               if (pStream->sInfo.fccHandler == mmioFOURCC('R','L','E','0') ||
1717                   pStream->sInfo.fccHandler == mmioFOURCC('R','L','E',' '))
1718                 lpbi->biCompression = BI_RLE8;
1719             }
1720             if (lpbi->biCompression == BI_RGB &&
1721                 (pStream->sInfo.fccHandler == 0 ||
1722                  pStream->sInfo.fccHandler == mmioFOURCC('N','O','N','E')))
1723               pStream->sInfo.fccHandler = comptypeDIB;
1724
1725             /* init rcFrame if it's empty */
1726             if (IsRectEmpty(&pStream->sInfo.rcFrame))
1727               SetRect(&pStream->sInfo.rcFrame, 0, 0, lpbi->biWidth, lpbi->biHeight);
1728           }
1729           break;
1730         case ckidSTREAMHEADER:
1731           {
1732             static const WCHAR streamTypeFmt[] = {'%','4','.','4','h','s',0};
1733
1734             AVIStreamHeader streamHdr;
1735             WCHAR           szType[25];
1736             WCHAR           streamNameFmt[25];
1737             UINT            count;
1738             LONG            n = ck.cksize;
1739
1740             if (ck.cksize > sizeof(streamHdr))
1741               n = sizeof(streamHdr);
1742
1743             if (mmioRead(This->hmmio, (HPSTR)&streamHdr, n) != n)
1744               return AVIERR_FILEREAD;
1745
1746             pStream->sInfo.fccType               = streamHdr.fccType;
1747             pStream->sInfo.fccHandler            = streamHdr.fccHandler;
1748             pStream->sInfo.dwFlags               = streamHdr.dwFlags;
1749             pStream->sInfo.wPriority             = streamHdr.wPriority;
1750             pStream->sInfo.wLanguage             = streamHdr.wLanguage;
1751             pStream->sInfo.dwInitialFrames       = streamHdr.dwInitialFrames;
1752             pStream->sInfo.dwScale               = streamHdr.dwScale;
1753             pStream->sInfo.dwRate                = streamHdr.dwRate;
1754             pStream->sInfo.dwStart               = streamHdr.dwStart;
1755             pStream->sInfo.dwLength              = streamHdr.dwLength;
1756             pStream->sInfo.dwSuggestedBufferSize =
1757               streamHdr.dwSuggestedBufferSize;
1758             pStream->sInfo.dwQuality             = streamHdr.dwQuality;
1759             pStream->sInfo.dwSampleSize          = streamHdr.dwSampleSize;
1760             pStream->sInfo.rcFrame.left          = streamHdr.rcFrame.left;
1761             pStream->sInfo.rcFrame.top           = streamHdr.rcFrame.top;
1762             pStream->sInfo.rcFrame.right         = streamHdr.rcFrame.right;
1763             pStream->sInfo.rcFrame.bottom        = streamHdr.rcFrame.bottom;
1764             pStream->sInfo.dwEditCount           = 0;
1765             pStream->sInfo.dwFormatChangeCount   = 0;
1766
1767             /* generate description for stream like "filename.avi Type #n" */
1768             if (streamHdr.fccType == streamtypeVIDEO)
1769               LoadStringW(AVIFILE_hModule, IDS_VIDEO, szType, sizeof(szType));
1770             else if (streamHdr.fccType == streamtypeAUDIO)
1771               LoadStringW(AVIFILE_hModule, IDS_AUDIO, szType, sizeof(szType));
1772             else
1773               wsprintfW(szType, streamTypeFmt, (char*)&streamHdr.fccType);
1774
1775             /* get count of this streamtype up to this stream */
1776             count = 0;
1777             for (n = nStream; 0 <= n; n--) {
1778               if (This->ppStreams[n]->sInfo.fccHandler == streamHdr.fccType)
1779                 count++;
1780             }
1781
1782             memset(pStream->sInfo.szName, 0, sizeof(pStream->sInfo.szName));
1783
1784             LoadStringW(AVIFILE_hModule, IDS_AVISTREAMFORMAT, streamNameFmt, sizeof(streamNameFmt));
1785
1786             /* FIXME: avoid overflow -- better use wsnprintfW, which doesn't exists ! */
1787             wsprintfW(pStream->sInfo.szName, streamNameFmt,
1788                       AVIFILE_BasenameW(This->szFileName), szType, count);
1789           }
1790           break;
1791         case ckidSTREAMNAME:
1792           { /* streamname will be saved as ASCII string */
1793             LPSTR str = HeapAlloc(GetProcessHeap(), 0, ck.cksize);
1794             if (str == NULL)
1795               return AVIERR_MEMORY;
1796
1797             if (mmioRead(This->hmmio, (HPSTR)str, ck.cksize) != ck.cksize)
1798             {
1799               HeapFree(GetProcessHeap(), 0, str);
1800               return AVIERR_FILEREAD;
1801             }
1802
1803             MultiByteToWideChar(CP_ACP, 0, str, -1, pStream->sInfo.szName,
1804                                 sizeof(pStream->sInfo.szName)/sizeof(pStream->sInfo.szName[0]));
1805
1806             HeapFree(GetProcessHeap(), 0, str);
1807           }
1808           break;
1809         case ckidAVIPADDING:
1810         case mmioFOURCC('p','a','d','d'):
1811           break;
1812         default:
1813           WARN(": found extra chunk 0x%08X\n", ck.ckid);
1814           hr = ReadChunkIntoExtra(&pStream->extra, This->hmmio, &ck);
1815           if (FAILED(hr))
1816             return hr;
1817         };
1818
1819         if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
1820           return AVIERR_FILEREAD;
1821       }
1822     } else {
1823       /* nested chunks in "LIST","hdrl" which are not of type "LIST","strl" */
1824       hr = ReadChunkIntoExtra(&This->fileextra, This->hmmio, &ckLIST2);
1825       if (FAILED(hr))
1826         return hr;
1827     }
1828     if (mmioAscend(This->hmmio, &ckLIST2, 0) != S_OK)
1829       return AVIERR_FILEREAD;
1830   }
1831
1832   /* read any extra headers in "LIST","hdrl" */
1833   FindChunkAndKeepExtras(&This->fileextra, This->hmmio, &ck, &ckLIST1, 0);
1834   if (mmioAscend(This->hmmio, &ckLIST1, 0) != S_OK)
1835     return AVIERR_FILEREAD;
1836
1837   /* search "LIST","movi" chunk in "RIFF","AVI " */
1838   ckLIST1.fccType = listtypeAVIMOVIE;
1839   hr = FindChunkAndKeepExtras(&This->fileextra, This->hmmio, &ckLIST1, &ckRIFF,
1840                               MMIO_FINDLIST);
1841   if (FAILED(hr))
1842     return hr;
1843
1844   This->dwMoviChunkPos = ckLIST1.dwDataOffset;
1845   This->dwIdxChunkPos  = ckLIST1.cksize + ckLIST1.dwDataOffset;
1846   if (mmioAscend(This->hmmio, &ckLIST1, 0) != S_OK)
1847     return AVIERR_FILEREAD;
1848
1849   /* try to find an index */
1850   ck.ckid = ckidAVINEWINDEX;
1851   hr = FindChunkAndKeepExtras(&This->fileextra, This->hmmio,
1852                               &ck, &ckRIFF, MMIO_FINDCHUNK);
1853   if (SUCCEEDED(hr) && ck.cksize > 0) {
1854     if (FAILED(AVIFILE_LoadIndex(This, ck.cksize, ckLIST1.dwDataOffset)))
1855       This->fInfo.dwFlags &= ~AVIFILEINFO_HASINDEX;
1856   }
1857
1858   /* when we haven't found an index or it's bad, then build one
1859    * by parsing 'movi' chunk */
1860   if ((This->fInfo.dwFlags & AVIFILEINFO_HASINDEX) == 0) {
1861     for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++)
1862       This->ppStreams[nStream]->lLastFrame = -1;
1863
1864     if (mmioSeek(This->hmmio, ckLIST1.dwDataOffset + sizeof(DWORD), SEEK_SET) == -1) {
1865       ERR(": Oops, can't seek back to 'movi' chunk!\n");
1866       return AVIERR_FILEREAD;
1867     }
1868
1869     /* seek through the 'movi' list until end */
1870     while (mmioDescend(This->hmmio, &ck, &ckLIST1, 0) == S_OK) {
1871       if (ck.ckid != FOURCC_LIST) {
1872         if (mmioAscend(This->hmmio, &ck, 0) == S_OK) {
1873           nStream = StreamFromFOURCC(ck.ckid);
1874
1875           if (nStream > This->fInfo.dwStreams)
1876             return AVIERR_BADFORMAT;
1877
1878           AVIFILE_AddFrame(This->ppStreams[nStream], ck.ckid, ck.cksize,
1879                            ck.dwDataOffset - 2 * sizeof(DWORD), 0);
1880         } else {
1881           nStream = StreamFromFOURCC(ck.ckid);
1882           WARN(": file seems to be truncated!\n");
1883           if (nStream <= This->fInfo.dwStreams &&
1884               This->ppStreams[nStream]->sInfo.dwSampleSize > 0) {
1885             ck.cksize = mmioSeek(This->hmmio, 0, SEEK_END);
1886             if (ck.cksize != -1) {
1887               ck.cksize -= ck.dwDataOffset;
1888               ck.cksize &= ~(This->ppStreams[nStream]->sInfo.dwSampleSize - 1);
1889
1890               AVIFILE_AddFrame(This->ppStreams[nStream], ck.ckid, ck.cksize,
1891                                ck.dwDataOffset - 2 * sizeof(DWORD), 0);
1892             }
1893           }
1894         }
1895       }
1896     }
1897   }
1898
1899   /* find other chunks */
1900   FindChunkAndKeepExtras(&This->fileextra, This->hmmio, &ck, &ckRIFF, 0);
1901
1902   return AVIERR_OK;
1903 }
1904
1905 static HRESULT AVIFILE_LoadIndex(IAVIFileImpl *This, DWORD size, DWORD offset)
1906 {
1907   AVIINDEXENTRY *lp;
1908   DWORD          pos, n;
1909   HRESULT        hr = AVIERR_OK;
1910   BOOL           bAbsolute = TRUE;
1911
1912   lp = HeapAlloc(GetProcessHeap(), 0, IDX_PER_BLOCK * sizeof(AVIINDEXENTRY));
1913   if (lp == NULL)
1914     return AVIERR_MEMORY;
1915
1916   /* adjust limits for index tables, so that inserting will be faster */
1917   for (n = 0; n < This->fInfo.dwStreams; n++) {
1918     IAVIStreamImpl *pStream = This->ppStreams[n];
1919
1920     pStream->lLastFrame = -1;
1921
1922     if (pStream->idxFrames != NULL) {
1923       HeapFree(GetProcessHeap(), 0, pStream->idxFrames);
1924       pStream->idxFrames  = NULL;
1925       pStream->nIdxFrames = 0;
1926     }
1927
1928     if (pStream->sInfo.dwSampleSize != 0) {
1929       if (n > 0 && This->fInfo.dwFlags & AVIFILEINFO_ISINTERLEAVED) {
1930         pStream->nIdxFrames = This->ppStreams[0]->nIdxFrames;
1931       } else if (pStream->sInfo.dwSuggestedBufferSize) {
1932         pStream->nIdxFrames =
1933           pStream->sInfo.dwLength / pStream->sInfo.dwSuggestedBufferSize;
1934       }
1935     } else
1936       pStream->nIdxFrames = pStream->sInfo.dwLength;
1937
1938     pStream->idxFrames =
1939       HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, pStream->nIdxFrames * sizeof(AVIINDEXENTRY));
1940     if (pStream->idxFrames == NULL && pStream->nIdxFrames > 0) {
1941       pStream->nIdxFrames = 0;
1942       return AVIERR_MEMORY;
1943     }
1944   }
1945
1946   pos = (DWORD)-1;
1947   while (size != 0) {
1948     LONG read = min(IDX_PER_BLOCK * sizeof(AVIINDEXENTRY), size);
1949
1950     if (mmioRead(This->hmmio, (HPSTR)lp, read) != read) {
1951       hr = AVIERR_FILEREAD;
1952       break;
1953     }
1954     size -= read;
1955
1956     if (pos == (DWORD)-1)
1957       pos = offset - lp->dwChunkOffset + sizeof(DWORD);
1958
1959     AVIFILE_ParseIndex(This, lp, read / sizeof(AVIINDEXENTRY),
1960                        pos, &bAbsolute);
1961   }
1962
1963   HeapFree(GetProcessHeap(), 0, lp);
1964
1965   /* checking ... */
1966   for (n = 0; n < This->fInfo.dwStreams; n++) {
1967     IAVIStreamImpl *pStream = This->ppStreams[n];
1968
1969     if (pStream->sInfo.dwSampleSize == 0 &&
1970         pStream->sInfo.dwLength != pStream->lLastFrame+1)
1971       ERR("stream %u length mismatch: dwLength=%u found=%d\n",
1972            n, pStream->sInfo.dwLength, pStream->lLastFrame);
1973   }
1974
1975   return hr;
1976 }
1977
1978 static HRESULT AVIFILE_ParseIndex(IAVIFileImpl *This, AVIINDEXENTRY *lp,
1979                                   LONG count, DWORD pos, BOOL *bAbsolute)
1980 {
1981   if (lp == NULL)
1982     return AVIERR_BADPARAM;
1983
1984   for (; count > 0; count--, lp++) {
1985     WORD nStream = StreamFromFOURCC(lp->ckid);
1986
1987     if (lp->ckid == listtypeAVIRECORD || nStream == 0x7F)
1988       continue; /* skip these */
1989
1990     if (nStream > This->fInfo.dwStreams)
1991       return AVIERR_BADFORMAT;
1992
1993     if (*bAbsolute && lp->dwChunkOffset < This->dwMoviChunkPos)
1994       *bAbsolute = FALSE;
1995
1996     if (*bAbsolute)
1997       lp->dwChunkOffset += sizeof(DWORD);
1998     else
1999       lp->dwChunkOffset += pos;
2000
2001     if (FAILED(AVIFILE_AddFrame(This->ppStreams[nStream], lp->ckid, lp->dwChunkLength, lp->dwChunkOffset, lp->dwFlags)))
2002       return AVIERR_MEMORY;
2003   }
2004
2005   return AVIERR_OK;
2006 }
2007
2008 static HRESULT AVIFILE_ReadBlock(IAVIStreamImpl *This, DWORD pos,
2009                                  LPVOID buffer, LONG size)
2010 {
2011   /* pre-conditions */
2012   assert(This != NULL);
2013   assert(This->paf != NULL);
2014   assert(This->paf->hmmio != NULL);
2015   assert(This->sInfo.dwStart <= pos && pos < This->sInfo.dwLength);
2016   assert(pos <= This->lLastFrame);
2017
2018   /* should we read as much as block gives us? */
2019   if (size == 0 || size > This->idxFrames[pos].dwChunkLength)
2020     size = This->idxFrames[pos].dwChunkLength;
2021
2022   /* read into out own buffer or given one? */
2023   if (buffer == NULL) {
2024     /* we also read the chunk */
2025     size += 2 * sizeof(DWORD);
2026
2027     /* check that buffer is big enough -- don't trust dwSuggestedBufferSize */
2028     if (This->lpBuffer == NULL || size < This->cbBuffer) {
2029       DWORD maxSize = max(size, This->sInfo.dwSuggestedBufferSize);
2030
2031       if (This->lpBuffer == NULL)
2032         This->lpBuffer = HeapAlloc(GetProcessHeap(), 0, maxSize);
2033       else
2034         This->lpBuffer = HeapReAlloc(GetProcessHeap(), 0, This->lpBuffer, maxSize);
2035       if (This->lpBuffer == NULL)
2036         return AVIERR_MEMORY;
2037       This->cbBuffer = max(size, This->sInfo.dwSuggestedBufferSize);
2038     }
2039
2040     /* now read the complete chunk into our buffer */
2041     if (mmioSeek(This->paf->hmmio, This->idxFrames[pos].dwChunkOffset, SEEK_SET) == -1)
2042       return AVIERR_FILEREAD;
2043     if (mmioRead(This->paf->hmmio, (HPSTR)This->lpBuffer, size) != size)
2044       return AVIERR_FILEREAD;
2045
2046     /* check if it was the correct block which we have read */
2047     if (This->lpBuffer[0] != This->idxFrames[pos].ckid ||
2048         This->lpBuffer[1] != This->idxFrames[pos].dwChunkLength) {
2049       ERR(": block %d not found at 0x%08X\n", pos, This->idxFrames[pos].dwChunkOffset);
2050       ERR(": Index says: '%4.4s'(0x%08X) size 0x%08X\n",
2051           (char*)&This->idxFrames[pos].ckid, This->idxFrames[pos].ckid,
2052           This->idxFrames[pos].dwChunkLength);
2053       ERR(": Data  says: '%4.4s'(0x%08X) size 0x%08X\n",
2054           (char*)&This->lpBuffer[0], This->lpBuffer[0], This->lpBuffer[1]);
2055       return AVIERR_FILEREAD;
2056     }
2057   } else {
2058     if (mmioSeek(This->paf->hmmio, This->idxFrames[pos].dwChunkOffset + 2 * sizeof(DWORD), SEEK_SET) == -1)
2059       return AVIERR_FILEREAD;
2060     if (mmioRead(This->paf->hmmio, (HPSTR)buffer, size) != size)
2061       return AVIERR_FILEREAD;
2062   }
2063
2064   return AVIERR_OK;
2065 }
2066
2067 static void    AVIFILE_SamplesToBlock(IAVIStreamImpl *This, LPLONG pos,
2068                                       LPLONG offset)
2069 {
2070   LONG block;
2071
2072   /* pre-conditions */
2073   assert(This != NULL);
2074   assert(pos != NULL);
2075   assert(offset != NULL);
2076   assert(This->sInfo.dwSampleSize != 0);
2077   assert(*pos >= This->sInfo.dwStart);
2078
2079   /* convert start sample to start bytes */
2080   (*offset)  = (*pos) - This->sInfo.dwStart;
2081   (*offset) *= This->sInfo.dwSampleSize;
2082
2083   /* convert bytes to block number */
2084   for (block = 0; block <= This->lLastFrame; block++) {
2085     if (This->idxFrames[block].dwChunkLength <= *offset)
2086       (*offset) -= This->idxFrames[block].dwChunkLength;
2087     else
2088       break;
2089   }
2090
2091   *pos = block;
2092 }
2093
2094 static HRESULT AVIFILE_SaveFile(IAVIFileImpl *This)
2095 {
2096   MainAVIHeader   MainAVIHdr;
2097   IAVIStreamImpl* pStream;
2098   MMCKINFO        ckRIFF;
2099   MMCKINFO        ckLIST1;
2100   MMCKINFO        ckLIST2;
2101   MMCKINFO        ck;
2102   DWORD           nStream;
2103   DWORD           dwPos;
2104   HRESULT         hr;
2105
2106   /* initialize some things */
2107   if (This->dwMoviChunkPos == 0)
2108     AVIFILE_ComputeMoviStart(This);
2109
2110   /* written one record to much? */
2111   if (This->ckLastRecord.dwFlags & MMIO_DIRTY) {
2112     This->dwNextFramePos -= 3 * sizeof(DWORD);
2113     if (This->nIdxRecords > 0)
2114       This->nIdxRecords--;
2115   }
2116
2117   AVIFILE_UpdateInfo(This);
2118
2119   assert(This->fInfo.dwScale != 0);
2120
2121   memset(&MainAVIHdr, 0, sizeof(MainAVIHdr));
2122   MainAVIHdr.dwMicroSecPerFrame    = MulDiv(This->fInfo.dwRate, 1000000,
2123                                             This->fInfo.dwScale);
2124   MainAVIHdr.dwMaxBytesPerSec      = This->fInfo.dwMaxBytesPerSec;
2125   MainAVIHdr.dwPaddingGranularity  = AVI_HEADERSIZE;
2126   MainAVIHdr.dwFlags               = This->fInfo.dwFlags;
2127   MainAVIHdr.dwTotalFrames         = This->fInfo.dwLength;
2128   MainAVIHdr.dwInitialFrames       = 0;
2129   MainAVIHdr.dwStreams             = This->fInfo.dwStreams;
2130   MainAVIHdr.dwSuggestedBufferSize = This->fInfo.dwSuggestedBufferSize;
2131   MainAVIHdr.dwWidth               = This->fInfo.dwWidth;
2132   MainAVIHdr.dwHeight              = This->fInfo.dwHeight;
2133   MainAVIHdr.dwInitialFrames       = This->dwInitialFrames;
2134
2135   /* now begin writing ... */
2136   mmioSeek(This->hmmio, 0, SEEK_SET);
2137
2138   /* RIFF chunk */
2139   ckRIFF.cksize  = 0;
2140   ckRIFF.fccType = formtypeAVI;
2141   if (mmioCreateChunk(This->hmmio, &ckRIFF, MMIO_CREATERIFF) != S_OK)
2142     return AVIERR_FILEWRITE;
2143
2144   /* AVI headerlist */
2145   ckLIST1.cksize  = 0;
2146   ckLIST1.fccType = listtypeAVIHEADER;
2147   if (mmioCreateChunk(This->hmmio, &ckLIST1, MMIO_CREATELIST) != S_OK)
2148     return AVIERR_FILEWRITE;
2149
2150   /* MainAVIHeader */
2151   ck.ckid    = ckidAVIMAINHDR;
2152   ck.cksize  = sizeof(MainAVIHdr);
2153   ck.fccType = 0;
2154   if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
2155     return AVIERR_FILEWRITE;
2156   if (mmioWrite(This->hmmio, (HPSTR)&MainAVIHdr, ck.cksize) != ck.cksize)
2157     return AVIERR_FILEWRITE;
2158   if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
2159     return AVIERR_FILEWRITE;
2160
2161   /* write the headers of each stream into a separate streamheader list */
2162   for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++) {
2163     AVIStreamHeader strHdr;
2164
2165     pStream = This->ppStreams[nStream];
2166
2167     /* begin the new streamheader list */
2168     ckLIST2.cksize  = 0;
2169     ckLIST2.fccType = listtypeSTREAMHEADER;
2170     if (mmioCreateChunk(This->hmmio, &ckLIST2, MMIO_CREATELIST) != S_OK)
2171       return AVIERR_FILEWRITE;
2172
2173     /* create an AVIStreamHeader from the AVSTREAMINFO */
2174     strHdr.fccType               = pStream->sInfo.fccType;
2175     strHdr.fccHandler            = pStream->sInfo.fccHandler;
2176     strHdr.dwFlags               = pStream->sInfo.dwFlags;
2177     strHdr.wPriority             = pStream->sInfo.wPriority;
2178     strHdr.wLanguage             = pStream->sInfo.wLanguage;
2179     strHdr.dwInitialFrames       = pStream->sInfo.dwInitialFrames;
2180     strHdr.dwScale               = pStream->sInfo.dwScale;
2181     strHdr.dwRate                = pStream->sInfo.dwRate;
2182     strHdr.dwStart               = pStream->sInfo.dwStart;
2183     strHdr.dwLength              = pStream->sInfo.dwLength;
2184     strHdr.dwSuggestedBufferSize = pStream->sInfo.dwSuggestedBufferSize;
2185     strHdr.dwQuality             = pStream->sInfo.dwQuality;
2186     strHdr.dwSampleSize          = pStream->sInfo.dwSampleSize;
2187     strHdr.rcFrame.left          = pStream->sInfo.rcFrame.left;
2188     strHdr.rcFrame.top           = pStream->sInfo.rcFrame.top;
2189     strHdr.rcFrame.right         = pStream->sInfo.rcFrame.right;
2190     strHdr.rcFrame.bottom        = pStream->sInfo.rcFrame.bottom;
2191
2192     /* now write the AVIStreamHeader */
2193     ck.ckid   = ckidSTREAMHEADER;
2194     ck.cksize = sizeof(strHdr);
2195     if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
2196       return AVIERR_FILEWRITE;
2197     if (mmioWrite(This->hmmio, (HPSTR)&strHdr, ck.cksize) != ck.cksize)
2198       return AVIERR_FILEWRITE;
2199     if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
2200       return AVIERR_FILEWRITE;
2201
2202     /* ... the hopefully ever present streamformat ... */
2203     ck.ckid   = ckidSTREAMFORMAT;
2204     ck.cksize = pStream->cbFormat;
2205     if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
2206       return AVIERR_FILEWRITE;
2207     if (pStream->lpFormat != NULL && ck.cksize > 0) {
2208       if (mmioWrite(This->hmmio, (HPSTR)pStream->lpFormat, ck.cksize) != ck.cksize)
2209         return AVIERR_FILEWRITE;
2210     }
2211     if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
2212       return AVIERR_FILEWRITE;
2213
2214     /* ... some optional existing handler data ... */
2215     if (pStream->lpHandlerData != NULL && pStream->cbHandlerData > 0) {
2216       ck.ckid   = ckidSTREAMHANDLERDATA;
2217       ck.cksize = pStream->cbHandlerData;
2218       if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
2219         return AVIERR_FILEWRITE;
2220       if (mmioWrite(This->hmmio, (HPSTR)pStream->lpHandlerData, ck.cksize) != ck.cksize)
2221         return AVIERR_FILEWRITE;
2222       if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
2223         return AVIERR_FILEWRITE;
2224     }
2225
2226     /* ... some optional additional extra chunk for this stream ... */
2227     if (pStream->extra.lp != NULL && pStream->extra.cb > 0) {
2228       /* the chunk header(s) are already in the strucuture */
2229       if (mmioWrite(This->hmmio, (HPSTR)pStream->extra.lp, pStream->extra.cb) != pStream->extra.cb)
2230         return AVIERR_FILEWRITE;
2231     }
2232
2233     /* ... an optional name for this stream ... */
2234     if (lstrlenW(pStream->sInfo.szName) > 0) {
2235       LPSTR str;
2236
2237       ck.ckid   = ckidSTREAMNAME;
2238       ck.cksize = lstrlenW(pStream->sInfo.szName) + 1;
2239       if (ck.cksize & 1) /* align */
2240         ck.cksize++;
2241       if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
2242         return AVIERR_FILEWRITE;
2243
2244       /* the streamname must be saved in ASCII not Unicode */
2245       str = HeapAlloc(GetProcessHeap(), 0, ck.cksize);
2246       if (str == NULL)
2247         return AVIERR_MEMORY;
2248       WideCharToMultiByte(CP_ACP, 0, pStream->sInfo.szName, -1, str,
2249                           ck.cksize, NULL, NULL);
2250
2251       if (mmioWrite(This->hmmio, (HPSTR)str, ck.cksize) != ck.cksize) {
2252         HeapFree(GetProcessHeap(), 0, str);
2253         return AVIERR_FILEWRITE;
2254       }
2255
2256       HeapFree(GetProcessHeap(), 0, str);
2257       if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
2258         return AVIERR_FILEWRITE;
2259     }
2260
2261     /* close streamheader list for this stream */
2262     if (mmioAscend(This->hmmio, &ckLIST2, 0) != S_OK)
2263       return AVIERR_FILEWRITE;
2264   } /* for (0 <= nStream < MainAVIHdr.dwStreams) */
2265
2266   /* close the aviheader list */
2267   if (mmioAscend(This->hmmio, &ckLIST1, 0) != S_OK)
2268     return AVIERR_FILEWRITE;
2269
2270   /* check for padding to pre-guessed 'movi'-chunk position */
2271   dwPos = ckLIST1.dwDataOffset + ckLIST1.cksize;
2272   if (This->dwMoviChunkPos - 2 * sizeof(DWORD) > dwPos) {
2273     ck.ckid   = ckidAVIPADDING;
2274     ck.cksize = This->dwMoviChunkPos - dwPos - 4 * sizeof(DWORD);
2275     assert((LONG)ck.cksize >= 0);
2276
2277     if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
2278       return AVIERR_FILEWRITE;
2279     if (mmioSeek(This->hmmio, ck.cksize, SEEK_CUR) == -1)
2280       return AVIERR_FILEWRITE;
2281     if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
2282       return AVIERR_FILEWRITE;
2283   }
2284
2285   /* now write the 'movi' chunk */
2286   mmioSeek(This->hmmio, This->dwMoviChunkPos - 2 * sizeof(DWORD), SEEK_SET);
2287   ckLIST1.cksize  = 0;
2288   ckLIST1.fccType = listtypeAVIMOVIE;
2289   if (mmioCreateChunk(This->hmmio, &ckLIST1, MMIO_CREATELIST) != S_OK)
2290     return AVIERR_FILEWRITE;
2291   if (mmioSeek(This->hmmio, This->dwNextFramePos, SEEK_SET) == -1)
2292     return AVIERR_FILEWRITE;
2293   if (mmioAscend(This->hmmio, &ckLIST1, 0) != S_OK)
2294     return AVIERR_FILEWRITE;
2295
2296   /* write 'idx1' chunk */
2297   hr = AVIFILE_SaveIndex(This);
2298   if (FAILED(hr))
2299     return hr;
2300
2301   /* write optional extra file chunks */
2302   if (This->fileextra.lp != NULL && This->fileextra.cb > 0) {
2303     /* as for the streams, are the chunk header(s) in the structure */
2304     if (mmioWrite(This->hmmio, (HPSTR)This->fileextra.lp, This->fileextra.cb) != This->fileextra.cb)
2305       return AVIERR_FILEWRITE;
2306   }
2307
2308   /* close RIFF chunk */
2309   if (mmioAscend(This->hmmio, &ckRIFF, 0) != S_OK)
2310     return AVIERR_FILEWRITE;
2311
2312   /* add some JUNK at end for bad parsers */
2313   memset(&ckRIFF, 0, sizeof(ckRIFF));
2314   mmioWrite(This->hmmio, (HPSTR)&ckRIFF, sizeof(ckRIFF));
2315   mmioFlush(This->hmmio, 0);
2316
2317   return AVIERR_OK;
2318 }
2319
2320 static HRESULT AVIFILE_SaveIndex(IAVIFileImpl *This)
2321 {
2322   IAVIStreamImpl *pStream;
2323   AVIINDEXENTRY   idx;
2324   MMCKINFO        ck;
2325   DWORD           nStream;
2326   LONG            n;
2327
2328   ck.ckid   = ckidAVINEWINDEX;
2329   ck.cksize = 0;
2330   if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
2331     return AVIERR_FILEWRITE;
2332
2333   if (This->fInfo.dwFlags & AVIFILEINFO_ISINTERLEAVED) {
2334     /* is interleaved -- write block of coresponding frames */
2335     LONG lInitialFrames = 0;
2336     LONG stepsize;
2337     LONG i;
2338
2339     if (This->ppStreams[0]->sInfo.dwSampleSize == 0)
2340       stepsize = 1;
2341     else
2342       stepsize = AVIStreamTimeToSample((PAVISTREAM)This->ppStreams[0], 1000000);
2343
2344     assert(stepsize > 0);
2345
2346     for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++) {
2347       if (lInitialFrames < This->ppStreams[nStream]->sInfo.dwInitialFrames)
2348         lInitialFrames = This->ppStreams[nStream]->sInfo.dwInitialFrames;
2349     }
2350
2351     for (i = -lInitialFrames; i < (LONG)This->fInfo.dwLength - lInitialFrames;
2352          i += stepsize) {
2353       DWORD nFrame = lInitialFrames + i;
2354
2355       assert(nFrame < This->nIdxRecords);
2356
2357       idx.ckid          = listtypeAVIRECORD;
2358       idx.dwFlags       = AVIIF_LIST;
2359       idx.dwChunkLength = This->idxRecords[nFrame].dwChunkLength;
2360       idx.dwChunkOffset = This->idxRecords[nFrame].dwChunkOffset
2361         - This->dwMoviChunkPos;
2362       if (mmioWrite(This->hmmio, (HPSTR)&idx, sizeof(idx)) != sizeof(idx))
2363         return AVIERR_FILEWRITE;
2364
2365       for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++) {
2366         pStream = This->ppStreams[nStream];
2367
2368         /* heave we reached start of this stream? */
2369         if (-(LONG)pStream->sInfo.dwInitialFrames > i)
2370           continue;
2371
2372         if (pStream->sInfo.dwInitialFrames < lInitialFrames)
2373           nFrame -= (lInitialFrames - pStream->sInfo.dwInitialFrames);
2374
2375         /* reached end of this stream? */
2376         if (pStream->lLastFrame <= nFrame)
2377           continue;
2378
2379         if ((pStream->sInfo.dwFlags & AVISTREAMINFO_FORMATCHANGES) &&
2380             pStream->sInfo.dwFormatChangeCount != 0 &&
2381             pStream->idxFmtChanges != NULL) {
2382           DWORD pos;
2383
2384           for (pos = 0; pos < pStream->sInfo.dwFormatChangeCount; pos++) {
2385             if (pStream->idxFmtChanges[pos].ckid == nFrame) {
2386               idx.dwFlags = AVIIF_NOTIME;
2387               idx.ckid    = MAKEAVICKID(cktypePALchange, pStream->nStream);
2388               idx.dwChunkLength = pStream->idxFmtChanges[pos].dwChunkLength;
2389               idx.dwChunkOffset = pStream->idxFmtChanges[pos].dwChunkOffset
2390                 - This->dwMoviChunkPos;
2391
2392               if (mmioWrite(This->hmmio, (HPSTR)&idx, sizeof(idx)) != sizeof(idx))
2393                 return AVIERR_FILEWRITE;
2394               break;
2395             }
2396           }
2397         } /* if have formatchanges */
2398
2399         idx.ckid          = pStream->idxFrames[nFrame].ckid;
2400         idx.dwFlags       = pStream->idxFrames[nFrame].dwFlags;
2401         idx.dwChunkLength = pStream->idxFrames[nFrame].dwChunkLength;
2402         idx.dwChunkOffset = pStream->idxFrames[nFrame].dwChunkOffset
2403           - This->dwMoviChunkPos;
2404         if (mmioWrite(This->hmmio, (HPSTR)&idx, sizeof(idx)) != sizeof(idx))
2405           return AVIERR_FILEWRITE;
2406       }
2407     }
2408   } else {
2409     /* not interleaved -- write index for each stream at once */
2410     for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++) {
2411       pStream = This->ppStreams[nStream];
2412
2413       for (n = 0; n <= pStream->lLastFrame; n++) {
2414         if ((pStream->sInfo.dwFlags & AVISTREAMINFO_FORMATCHANGES) &&
2415             (pStream->sInfo.dwFormatChangeCount != 0)) {
2416           DWORD pos;
2417
2418           for (pos = 0; pos < pStream->sInfo.dwFormatChangeCount; pos++) {
2419             if (pStream->idxFmtChanges[pos].ckid == n) {
2420               idx.dwFlags = AVIIF_NOTIME;
2421               idx.ckid    = MAKEAVICKID(cktypePALchange, pStream->nStream);
2422               idx.dwChunkLength = pStream->idxFmtChanges[pos].dwChunkLength;
2423               idx.dwChunkOffset =
2424                 pStream->idxFmtChanges[pos].dwChunkOffset - This->dwMoviChunkPos;
2425               if (mmioWrite(This->hmmio, (HPSTR)&idx, sizeof(idx)) != sizeof(idx))
2426                 return AVIERR_FILEWRITE;
2427               break;
2428             }
2429           }
2430         } /* if have formatchanges */
2431
2432         idx.ckid          = pStream->idxFrames[n].ckid;
2433         idx.dwFlags       = pStream->idxFrames[n].dwFlags;
2434         idx.dwChunkLength = pStream->idxFrames[n].dwChunkLength;
2435         idx.dwChunkOffset = pStream->idxFrames[n].dwChunkOffset
2436           - This->dwMoviChunkPos;
2437
2438         if (mmioWrite(This->hmmio, (HPSTR)&idx, sizeof(idx)) != sizeof(idx))
2439           return AVIERR_FILEWRITE;
2440       }
2441     }
2442   } /* if not interleaved */
2443
2444   if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
2445     return AVIERR_FILEWRITE;
2446
2447   return AVIERR_OK;
2448 }
2449
2450 static ULONG  AVIFILE_SearchStream(IAVIFileImpl *This, DWORD fcc, LONG lSkip)
2451 {
2452   UINT i;
2453   UINT nStream;
2454
2455   /* pre-condition */
2456   assert(lSkip >= 0);
2457
2458   if (fcc != 0) {
2459     /* search the number of the specified stream */
2460     nStream = (ULONG)-1;
2461     for (i = 0; i < This->fInfo.dwStreams; i++) {
2462       assert(This->ppStreams[i] != NULL);
2463
2464       if (This->ppStreams[i]->sInfo.fccType == fcc) {
2465         if (lSkip == 0) {
2466           nStream = i;
2467           break;
2468         } else
2469           lSkip--;
2470       }
2471     }
2472   } else
2473     nStream = lSkip;
2474
2475   return nStream;
2476 }
2477
2478 static void    AVIFILE_UpdateInfo(IAVIFileImpl *This)
2479 {
2480   UINT i;
2481
2482   /* pre-conditions */
2483   assert(This != NULL);
2484
2485   This->fInfo.dwMaxBytesPerSec      = 0;
2486   This->fInfo.dwCaps                = AVIFILECAPS_CANREAD|AVIFILECAPS_CANWRITE;
2487   This->fInfo.dwSuggestedBufferSize = 0;
2488   This->fInfo.dwWidth               = 0;
2489   This->fInfo.dwHeight              = 0;
2490   This->fInfo.dwScale               = 0;
2491   This->fInfo.dwRate                = 0;
2492   This->fInfo.dwLength              = 0;
2493   This->dwInitialFrames             = 0;
2494
2495   for (i = 0; i < This->fInfo.dwStreams; i++) {
2496     AVISTREAMINFOW *psi;
2497     DWORD           n;
2498
2499     /* pre-conditions */
2500     assert(This->ppStreams[i] != NULL);
2501
2502     psi = &This->ppStreams[i]->sInfo;
2503     assert(psi->dwScale != 0);
2504     assert(psi->dwRate != 0);
2505
2506     if (i == 0) {
2507       /* use first stream timings as base */
2508       This->fInfo.dwScale  = psi->dwScale;
2509       This->fInfo.dwRate   = psi->dwRate;
2510       This->fInfo.dwLength = psi->dwLength;
2511     } else {
2512       n = AVIStreamSampleToSample((PAVISTREAM)This->ppStreams[0],
2513                                   (PAVISTREAM)This->ppStreams[i],psi->dwLength);
2514       if (This->fInfo.dwLength < n)
2515         This->fInfo.dwLength = n;
2516     }
2517
2518     if (This->dwInitialFrames < psi->dwInitialFrames)
2519       This->dwInitialFrames = psi->dwInitialFrames;
2520
2521     if (This->fInfo.dwSuggestedBufferSize < psi->dwSuggestedBufferSize)
2522       This->fInfo.dwSuggestedBufferSize = psi->dwSuggestedBufferSize;
2523
2524     if (psi->dwSampleSize != 0) {
2525       /* fixed sample size -- exact computation */
2526       This->fInfo.dwMaxBytesPerSec += MulDiv(psi->dwSampleSize, psi->dwRate,
2527                                              psi->dwScale);
2528     } else {
2529       /* variable sample size -- only upper limit */
2530       This->fInfo.dwMaxBytesPerSec += MulDiv(psi->dwSuggestedBufferSize,
2531                                              psi->dwRate, psi->dwScale);
2532
2533       /* update dimensions */
2534       n = psi->rcFrame.right - psi->rcFrame.left;
2535       if (This->fInfo.dwWidth < n)
2536         This->fInfo.dwWidth = n;
2537       n = psi->rcFrame.bottom - psi->rcFrame.top;
2538       if (This->fInfo.dwHeight < n)
2539         This->fInfo.dwHeight = n;
2540     }
2541   }
2542 }
2543
2544 static HRESULT AVIFILE_WriteBlock(IAVIStreamImpl *This, DWORD block,
2545                                   FOURCC ckid, DWORD flags, LPVOID buffer,
2546                                   LONG size)
2547 {
2548   MMCKINFO ck;
2549
2550   ck.ckid    = ckid;
2551   ck.cksize  = size;
2552   ck.fccType = 0;
2553
2554   /* if no frame/block is already written, we must compute start of movi chunk */
2555   if (This->paf->dwMoviChunkPos == 0)
2556     AVIFILE_ComputeMoviStart(This->paf);
2557
2558   if (mmioSeek(This->paf->hmmio, This->paf->dwNextFramePos, SEEK_SET) == -1)
2559     return AVIERR_FILEWRITE;
2560
2561   if (mmioCreateChunk(This->paf->hmmio, &ck, 0) != S_OK)
2562     return AVIERR_FILEWRITE;
2563   if (buffer != NULL && size > 0) {
2564     if (mmioWrite(This->paf->hmmio, (HPSTR)buffer, size) != size)
2565       return AVIERR_FILEWRITE;
2566   }
2567   if (mmioAscend(This->paf->hmmio, &ck, 0) != S_OK)
2568     return AVIERR_FILEWRITE;
2569
2570   This->paf->fDirty         = TRUE;
2571   This->paf->dwNextFramePos = mmioSeek(This->paf->hmmio, 0, SEEK_CUR);
2572
2573   return AVIFILE_AddFrame(This, ckid, size,
2574                           ck.dwDataOffset - 2 * sizeof(DWORD), flags);
2575 }