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

   1 /*
   2  * Copyright 2003 Michael Günnewig
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #define COM_NO_WINDOWS_H
  20 #include <assert.h>
  21 #include <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "winuser.h"
  26 #include "wingdi.h"
  27 #include "winnls.h"
  28 #include "winerror.h"
  29 #include "windowsx.h"
  30 #include "mmsystem.h"
  31 #include "vfw.h"
  32
  33 #include "avifile_private.h"
  34 #include "extrachunk.h"
  35
  36 #include "wine/debug.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(avifile);
  39
  40 /***********************************************************************/
  41
  42 /* internal interface to get access to table of stream in an editable stream */
  43 typedef struct IEditStreamInternal IEditStreamInternal;
  44
  45 typedef struct _EditStreamTable {
  46   PAVISTREAM pStream;  /* stream which contains the data */
  47   DWORD      dwStart;  /* where starts the part which is also our */
  48   DWORD      dwLength; /* how many is also in this stream */
  49 } EditStreamTable;
  50
  51 #define INTERFACE IEditStreamInternal
  52 #define IEditStreamInternal_METHODS \
  53     IUnknown_METHODS \
  54     STDMETHOD(GetEditStreamImpl)(THIS_ LPVOID*) PURE;
  55 ICOM_DEFINE(IEditStreamInternal, IUnknown)
  56 #undef INTERFACE
  57
  58 #define EditStreamEnd(This,streamNr) ((This)->pStreams[streamNr].dwStart + \
  59                                       (This)->pStreams[streamNr].dwLength)
  60
  61 /***********************************************************************/
  62
  63 static HRESULT WINAPI IAVIEditStream_fnQueryInterface(IAVIEditStream*iface,REFIID refiid,LPVOID *obj);
  64 static ULONG   WINAPI IAVIEditStream_fnAddRef(IAVIEditStream*iface);
  65 static ULONG   WINAPI IAVIEditStream_fnRelease(IAVIEditStream*iface);
  66 static HRESULT WINAPI IAVIEditStream_fnCut(IAVIEditStream*iface,LONG*plStart,
  67                                            LONG*plLength,PAVISTREAM*ppResult);
  68 static HRESULT WINAPI IAVIEditStream_fnCopy(IAVIEditStream*iface,LONG*plStart,
  69                                             LONG*plLength,PAVISTREAM*ppResult);
  70 static HRESULT WINAPI IAVIEditStream_fnPaste(IAVIEditStream*iface,LONG*plStart,
  71                                              LONG*plLength,PAVISTREAM pSource,
  72                                              LONG lStart,LONG lEnd);
  73 static HRESULT WINAPI IAVIEditStream_fnClone(IAVIEditStream*iface,
  74                                              PAVISTREAM*ppResult);
  75 static HRESULT WINAPI IAVIEditStream_fnSetInfo(IAVIEditStream*iface,
  76                                                LPAVISTREAMINFOW asi,LONG size);
  77
  78 struct ICOM_VTABLE(IAVIEditStream) ieditstream = {
  79   ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
  80   IAVIEditStream_fnQueryInterface,
  81   IAVIEditStream_fnAddRef,
  82   IAVIEditStream_fnRelease,
  83   IAVIEditStream_fnCut,
  84   IAVIEditStream_fnCopy,
  85   IAVIEditStream_fnPaste,
  86   IAVIEditStream_fnClone,
  87   IAVIEditStream_fnSetInfo
  88 };
  89
  90 static HRESULT WINAPI IEditAVIStream_fnQueryInterface(IAVIStream*iface,REFIID refiid,LPVOID*obj);
  91 static ULONG   WINAPI IEditAVIStream_fnAddRef(IAVIStream*iface);
  92 static ULONG   WINAPI IEditAVIStream_fnRelease(IAVIStream*iface);
  93 static HRESULT WINAPI IEditAVIStream_fnCreate(IAVIStream*iface,LPARAM lParam1,LPARAM lParam2);
  94 static HRESULT WINAPI IEditAVIStream_fnInfo(IAVIStream*iface,AVISTREAMINFOW *psi,LONG size);
  95 static LONG    WINAPI IEditAVIStream_fnFindSample(IAVIStream*iface,LONG pos,
  96                                                   LONG flags);
  97 static HRESULT WINAPI IEditAVIStream_fnReadFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG*formatsize);
  98 static HRESULT WINAPI IEditAVIStream_fnSetFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG formatsize);
  99 static HRESULT WINAPI IEditAVIStream_fnRead(IAVIStream*iface,LONG start,
 100                                             LONG samples,LPVOID buffer,
 101                                             LONG buffersize,LONG*bytesread,
 102                                             LONG*samplesread);
 103 static HRESULT WINAPI IEditAVIStream_fnWrite(IAVIStream*iface,LONG start,
 104                                              LONG samples,LPVOID buffer,
 105                                              LONG buffersize,DWORD flags,
 106                                              LONG*sampwritten,LONG*byteswritten);
 107 static HRESULT WINAPI IEditAVIStream_fnDelete(IAVIStream*iface,LONG start,LONG samples);
 108 static HRESULT WINAPI IEditAVIStream_fnReadData(IAVIStream*iface,DWORD fcc,
 109                                                 LPVOID lp,LONG *lpread);
 110 static HRESULT WINAPI IEditAVIStream_fnWriteData(IAVIStream*iface,DWORD fcc,
 111                                                  LPVOID lp,LONG size);
 112 static HRESULT WINAPI IEditAVIStream_fnSetInfo(IAVIStream*iface,AVISTREAMINFOW*info,LONG infolen);
 113
 114 struct ICOM_VTABLE(IAVIStream) ieditstast = {
 115   ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 116   IEditAVIStream_fnQueryInterface,
 117   IEditAVIStream_fnAddRef,
 118   IEditAVIStream_fnRelease,
 119   IEditAVIStream_fnCreate,
 120   IEditAVIStream_fnInfo,
 121   IEditAVIStream_fnFindSample,
 122   IEditAVIStream_fnReadFormat,
 123   IEditAVIStream_fnSetFormat,
 124   IEditAVIStream_fnRead,
 125   IEditAVIStream_fnWrite,
 126   IEditAVIStream_fnDelete,
 127   IEditAVIStream_fnReadData,
 128   IEditAVIStream_fnWriteData,
 129   IEditAVIStream_fnSetInfo
 130 };
 131
 132 static HRESULT WINAPI IEditStreamInternal_fnQueryInterface(IEditStreamInternal*iface,REFIID refiid,LPVOID*obj);
 133 static ULONG   WINAPI IEditStreamInternal_fnAddRef(IEditStreamInternal*iface);
 134 static ULONG   WINAPI IEditStreamInternal_fnRelease(IEditStreamInternal*iface);
 135 static HRESULT WINAPI IEditStreamInternal_fnGetEditStreamImpl(IEditStreamInternal*iface,LPVOID*ppimpl);
 136
 137 struct ICOM_VTABLE(IEditStreamInternal) ieditstreaminternal = {
 138   ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 139   IEditStreamInternal_fnQueryInterface,
 140   IEditStreamInternal_fnAddRef,
 141   IEditStreamInternal_fnRelease,
 142   IEditStreamInternal_fnGetEditStreamImpl
 143 };
 144
 145 typedef struct _IAVIEditStreamImpl IAVIEditStreamImpl;
 146
 147 typedef struct _IEditAVIStreamImpl {
 148   /* IUnknown stuff */
 149   ICOM_VFIELD(IAVIStream);
 150
 151   /* IAVIStream stuff */
 152   IAVIEditStreamImpl *pae;
 153 } IEditAVIStreamImpl;
 154
 155 typedef struct _IEditStreamInternalImpl {
 156   /* IUnknown stuff */
 157   ICOM_VFIELD(IEditStreamInternal);
 158
 159   /* IEditStreamInternal stuff */
 160   IAVIEditStreamImpl *pae;
 161 } IEditStreamInternalImpl;
 162
 163 struct _IAVIEditStreamImpl {
 164   /* IUnknown stuff */
 165   ICOM_VFIELD(IAVIEditStream);
 166   DWORD  ref;
 167
 168   /* IAVIEditStream stuff */
 169   IEditAVIStreamImpl      iAVIStream;
 170   IEditStreamInternalImpl iEditStreamInternal;
 171
 172   AVISTREAMINFOW       sInfo;
 173
 174   EditStreamTable     *pStreams;
 175   DWORD                nStreams;   /* current fill level of pStreams table */
 176   DWORD                nTableSize; /* size of pStreams table */
 177
 178   BOOL                 bDecompress;
 179   PAVISTREAM           pCurStream;
 180   PGETFRAME            pg;         /* IGetFrame for pCurStream */
 181   LPBITMAPINFOHEADER   lpFrame;    /* frame of pCurStream */
 182 };
 183
 184 /***********************************************************************/
 185
 186 PAVIEDITSTREAM AVIFILE_CreateEditStream(PAVISTREAM pstream)
 187 {
 188   IAVIEditStreamImpl *pedit = NULL;
 189
 190   pedit = (IAVIEditStreamImpl*)LocalAlloc(LPTR,sizeof(IAVIEditStreamImpl));
 191   if (pedit == NULL)
 192     return NULL;
 193
 194   pedit->lpVtbl            = &ieditstream;
 195   pedit->iAVIStream.lpVtbl = &ieditstast;
 196   pedit->iAVIStream.pae    = pedit;
 197   pedit->iEditStreamInternal.lpVtbl = &ieditstreaminternal;
 198   pedit->iEditStreamInternal.pae    = pedit;
 199   pedit->ref = 1;
 200
 201   IAVIStream_Create((PAVISTREAM)&pedit->iAVIStream,(LPARAM)pstream,0);
 202
 203   return (PAVIEDITSTREAM)pedit;
 204 }
 205
 206 static HRESULT AVIFILE_FindStreamInTable(IAVIEditStreamImpl* const This,
 207                                          DWORD pos,PAVISTREAM *ppStream,
 208                                          DWORD* streamPos,
 209                                          DWORD* streamNr,BOOL bFindSample)
 210 {
 211   DWORD n;
 212
 213   TRACE("(%p,%lu,%p,%p,%p,%d)\n",This,pos,ppStream,streamPos,
 214         streamNr,bFindSample);
 215
 216   if (pos < This->sInfo.dwStart)
 217     return AVIERR_BADPARAM;
 218
 219   pos -= This->sInfo.dwStart;
 220   for (n = 0; n < This->nStreams; n++) {
 221     if (pos < This->pStreams[n].dwLength) {
 222       *ppStream  = This->pStreams[n].pStream;
 223       *streamPos = This->pStreams[n].dwStart + pos;
 224       if (streamNr != NULL)
 225         *streamNr = n;
 226
 227       return AVIERR_OK;
 228     }
 229     pos -= This->pStreams[n].dwLength;
 230   }
 231   if (pos == 0 && bFindSample) {
 232     *ppStream  = This->pStreams[--n].pStream;
 233     *streamPos = EditStreamEnd(This, n);
 234     if (streamNr != NULL)
 235       *streamNr = n;
 236
 237     TRACE(" -- pos=0 && b=1 -> (%p,%lu,%lu)\n",*ppStream, *streamPos, n);
 238     return AVIERR_OK;
 239   } else {
 240     *ppStream = NULL;
 241     *streamPos = 0;
 242     if (streamNr != NULL)
 243       *streamNr = 0;
 244
 245     TRACE(" -> ERROR (NULL,0,0)\n");
 246     return AVIERR_BADPARAM;
 247   }
 248 }
 249
 250 static LPVOID AVIFILE_ReadFrame(IAVIEditStreamImpl* const This,
 251                                 PAVISTREAM pstream, LONG pos)
 252 {
 253   PGETFRAME pg;
 254
 255   TRACE("(%p,%p,%ld)\n",This,pstream,pos);
 256
 257   if (pstream == NULL)
 258     return NULL;
 259
 260   /* if stream changes make sure that only palette changes */
 261   if (This->pCurStream != pstream) {
 262     pg = AVIStreamGetFrameOpen(pstream, NULL);
 263     if (pg == NULL)
 264       return NULL;
 265     if (This->pg != NULL) {
 266       if (IGetFrame_SetFormat(pg, This->lpFrame, NULL, 0, 0, -1, -1)) {
 267         AVIStreamGetFrameClose(pg);
 268         ERR(": IGetFrame_SetFormat failed\n");
 269         return NULL;
 270       }
 271       AVIStreamGetFrameClose(This->pg);
 272     }
 273     This->pg         = pg;
 274     This->pCurStream = pstream;
 275   }
 276
 277   /* now get the decompressed frame */
 278   This->lpFrame = AVIStreamGetFrame(This->pg, pos);
 279   if (This->lpFrame != NULL)
 280     This->sInfo.dwSuggestedBufferSize = This->lpFrame->biSizeImage;
 281
 282   return This->lpFrame;
 283 }
 284
 285 static HRESULT AVIFILE_RemoveStream(IAVIEditStreamImpl* const This, DWORD nr)
 286 {
 287   assert(This != NULL);
 288   assert(nr < This->nStreams);
 289
 290   /* remove part nr */
 291   IAVIStream_Release(This->pStreams[nr].pStream);
 292   This->nStreams--;
 293   if (This->nStreams - nr > 0) {
 294     memmove(This->pStreams + nr, This->pStreams + nr + 1,
 295             (This->nStreams - nr) * sizeof(EditStreamTable));
 296   }
 297   This->pStreams[This->nStreams].pStream  = NULL;
 298   This->pStreams[This->nStreams].dwStart  = 0;
 299   This->pStreams[This->nStreams].dwLength = 0;
 300
 301   /* try to merge the part before the deleted one and the one after it */
 302   if (0 < nr && 0 < This->nStreams &&
 303       This->pStreams[nr - 1].pStream == This->pStreams[nr].pStream) {
 304     if (EditStreamEnd(This, nr - 1) == This->pStreams[nr].dwStart) {
 305       This->pStreams[nr - 1].dwLength += This->pStreams[nr].dwLength;
 306       return AVIFILE_RemoveStream(This, nr);
 307     }
 308   }
 309
 310   return AVIERR_OK;
 311 }
 312
 313 static BOOL AVIFILE_FormatsEqual(PAVISTREAM avi1, PAVISTREAM avi2)
 314 {
 315   LPVOID fmt1 = NULL, fmt2 = NULL;
 316   LONG size1, size2, start1, start2;
 317   BOOL status = FALSE;
 318
 319   assert(avi1 != NULL && avi2 != NULL);
 320
 321   /* get stream starts and check format sizes */
 322   start1 = AVIStreamStart(avi1);
 323   start2 = AVIStreamStart(avi2);
 324   if (FAILED(AVIStreamFormatSize(avi1, start1, &size1)))
 325     return FALSE;
 326   if (FAILED(AVIStreamFormatSize(avi2, start2, &size2)))
 327     return FALSE;
 328   if (size1 != size2)
 329     return FALSE;
 330
 331   /* sizes match, now get formats and compare them */
 332   fmt1 = GlobalAllocPtr(GHND, size1);
 333   if (fmt1 == NULL)
 334     return FALSE;
 335   if (SUCCEEDED(AVIStreamReadFormat(avi1, start1, fmt1, &size1))) {
 336     fmt2 = GlobalAllocPtr(GHND, size1);
 337     if (fmt2 != NULL) {
 338       if (SUCCEEDED(AVIStreamReadFormat(avi2, start2, fmt2, &size1)))
 339         status = (memcmp(fmt1, fmt2, size1) == 0);
 340     }
 341   }
 342
 343   if (fmt2 != NULL)
 344     GlobalFreePtr(fmt2);
 345   GlobalFreePtr(fmt1);
 346
 347   return status;
 348 }
 349
 350 /***********************************************************************/
 351
 352 static HRESULT WINAPI IAVIEditStream_fnQueryInterface(IAVIEditStream*iface,REFIID refiid,LPVOID *obj)
 353 {
 354   ICOM_THIS(IAVIEditStreamImpl,iface);
 355
 356   TRACE("(%p,%s,%p)\n", This, debugstr_guid(refiid), obj);
 357
 358   if (IsEqualGUID(&IID_IUnknown, refiid) ||
 359       IsEqualGUID(&IID_IAVIEditStream, refiid)) {
 360     *obj = iface;
 361     IAVIEditStream_AddRef(iface);
 362
 363     return S_OK;
 364   } else if (IsEqualGUID(&IID_IAVIStream, refiid)) {
 365     *obj = &This->iAVIStream;
 366     IAVIEditStream_AddRef(iface);
 367
 368     return S_OK;
 369   } else if (IsEqualGUID(&IID_IEditStreamInternal, refiid)) {
 370     *obj = &This->iEditStreamInternal;
 371     IAVIEditStream_AddRef(iface);
 372
 373     return S_OK;
 374   }
 375
 376   return OLE_E_ENUM_NOMORE;
 377 }
 378
 379 static ULONG   WINAPI IAVIEditStream_fnAddRef(IAVIEditStream*iface)
 380 {
 381   ICOM_THIS(IAVIEditStreamImpl,iface);
 382
 383   TRACE("(%p) -> %ld\n", iface, This->ref + 1);
 384   return ++(This->ref);
 385 }
 386
 387 static ULONG   WINAPI IAVIEditStream_fnRelease(IAVIEditStream*iface)
 388 {
 389   ICOM_THIS(IAVIEditStreamImpl,iface);
 390   DWORD i;
 391
 392   TRACE("(%p) -> %ld\n", iface, This->ref - 1);
 393
 394   if (!--(This->ref)) {
 395     /* releaase memory */
 396     if (This->pg != NULL)
 397       AVIStreamGetFrameClose(This->pg);
 398     if (This->pStreams != NULL) {
 399       for (i = 0; i < This->nStreams; i++) {
 400         if (This->pStreams[i].pStream != NULL)
 401           IAVIStream_Release(This->pStreams[i].pStream);
 402       }
 403       GlobalFreePtr(This->pStreams);
 404     }
 405
 406     LocalFree((HLOCAL)This);
 407     return 0;
 408   }
 409   return This->ref;
 410 }
 411
 412 static HRESULT WINAPI IAVIEditStream_fnCut(IAVIEditStream*iface,LONG*plStart,
 413                                            LONG*plLength,PAVISTREAM*ppResult)
 414 {
 415   ICOM_THIS(IAVIEditStreamImpl,iface);
 416   PAVISTREAM stream;
 417   DWORD      start, len, streamPos, streamNr;
 418   HRESULT    hr;
 419
 420   TRACE("(%p,%p,%p,%p)\n",iface,plStart,plLength,ppResult);
 421
 422   if (ppResult != NULL)
 423     *ppResult = NULL;
 424   if (plStart == NULL || plLength == NULL || *plStart < 0)
 425     return AVIERR_BADPARAM;
 426
 427   /* if asked for cutted part copy it before deleting */
 428   if (ppResult != NULL) {
 429     hr = IAVIEditStream_Copy(iface, plStart, plLength, ppResult);
 430     if (FAILED(hr))
 431       return hr;
 432   }
 433
 434   start = *plStart;
 435   len   = *plLength;
 436
 437   /* now delete the requested part */
 438   while (len > 0) {
 439     hr = AVIFILE_FindStreamInTable(This, start, &stream,
 440                                    &streamPos, &streamNr, FALSE);
 441     if (FAILED(hr))
 442       return hr;
 443     if (This->pStreams[streamNr].dwStart == streamPos) {
 444       /* deleting from start of part */
 445       if (len < This->pStreams[streamNr].dwLength) {
 446         start += len;
 447         This->pStreams[streamNr].dwStart  += len;
 448         This->pStreams[streamNr].dwLength -= len;
 449         This->sInfo.dwLength -= len;
 450         len = 0;
 451
 452         /* we must return decompressed data now */
 453         This->bDecompress = TRUE;
 454       } else {
 455         /* deleting hole part */
 456         len -= This->pStreams[streamNr].dwLength;
 457         AVIFILE_RemoveStream(This,streamNr);
 458       }
 459     } else if (EditStreamEnd(This, streamNr) <= streamPos + len) {
 460       /* deleting at end of a part */
 461       DWORD count = EditStreamEnd(This, streamNr) - streamPos;
 462       This->sInfo.dwLength -= count;
 463       len                  -= count;
 464       This->pStreams[streamNr].dwLength =
 465         streamPos - This->pStreams[streamNr].dwStart;
 466     } else {
 467       /* splitting */
 468       if (This->nStreams + 1 >= This->nTableSize) {
 469         This->pStreams =
 470           GlobalReAllocPtr(This->pStreams, (This->nTableSize + 32) * sizeof(EditStreamTable), GMEM_SHARE|GHND);
 471         if (This->pStreams == NULL)
 472           return AVIERR_MEMORY;
 473         This->nTableSize += 32;
 474       }
 475       memmove(This->pStreams + streamNr + 1, This->pStreams + streamNr,
 476               (This->nStreams - streamNr) * sizeof(EditStreamTable));
 477       This->nStreams++;
 478
 479       IAVIStream_AddRef(This->pStreams[streamNr + 1].pStream);
 480       This->pStreams[streamNr + 1].dwStart  = streamPos + len;
 481       This->pStreams[streamNr + 1].dwLength =
 482         EditStreamEnd(This, streamNr) - This->pStreams[streamNr + 1].dwStart;
 483
 484       This->pStreams[streamNr].dwLength =
 485         streamPos - This->pStreams[streamNr].dwStart;
 486       This->sInfo.dwLength -= len;
 487       len = 0;
 488     }
 489   }
 490
 491   This->sInfo.dwEditCount++;
 492
 493   return AVIERR_OK;
 494 }
 495
 496 static HRESULT WINAPI IAVIEditStream_fnCopy(IAVIEditStream*iface,LONG*plStart,
 497                                             LONG*plLength,PAVISTREAM*ppResult)
 498 {
 499   ICOM_THIS(IAVIEditStreamImpl,iface);
 500   IAVIEditStreamImpl* pEdit;
 501   HRESULT hr;
 502   LONG start = 0;
 503
 504   TRACE("(%p,%p,%p,%p)\n",iface,plStart,plLength,ppResult);
 505
 506   if (ppResult == NULL)
 507     return AVIERR_BADPARAM;
 508   *ppResult = NULL;
 509   if (plStart == NULL || plLength == NULL || *plStart < 0 || *plLength < 0)
 510     return AVIERR_BADPARAM;
 511
 512   /* check bounds */
 513   if (*(LPDWORD)plLength > This->sInfo.dwLength)
 514     *(LPDWORD)plLength = This->sInfo.dwLength;
 515   if (*(LPDWORD)plStart < This->sInfo.dwStart) {
 516     *(LPDWORD)plLength -= This->sInfo.dwStart - *(LPDWORD)plStart;
 517     *(LPDWORD)plStart   = This->sInfo.dwStart;
 518     if (*plLength < 0)
 519       return AVIERR_BADPARAM;
 520   }
 521   if (*(LPDWORD)plStart + *(LPDWORD)plLength > This->sInfo.dwStart + This->sInfo.dwLength)
 522     *(LPDWORD)plLength = This->sInfo.dwStart + This->sInfo.dwLength -
 523       *(LPDWORD)plStart;
 524
 525   pEdit = (IAVIEditStreamImpl*)AVIFILE_CreateEditStream(NULL);
 526   if (pEdit == NULL)
 527     return AVIERR_MEMORY;
 528
 529   hr = IAVIEditStream_Paste((PAVIEDITSTREAM)pEdit,&start,plLength,
 530                             (PAVISTREAM)&This->iAVIStream,*plStart,
 531                             *plStart + *plLength);
 532   *plStart = start;
 533   if (FAILED(hr))
 534     IAVIEditStream_Release((PAVIEDITSTREAM)pEdit);
 535   else
 536     *ppResult = (PAVISTREAM)&pEdit->iAVIStream;
 537
 538   return hr;
 539 }
 540
 541 static HRESULT WINAPI IAVIEditStream_fnPaste(IAVIEditStream*iface,LONG*plStart,
 542                                              LONG*plLength,PAVISTREAM pSource,
 543                                              LONG lStart,LONG lLength)
 544 {
 545   ICOM_THIS(IAVIEditStreamImpl,iface);
 546   AVISTREAMINFOW      srcInfo;
 547   IEditStreamInternal*pInternal = NULL;
 548   IAVIEditStreamImpl *pEdit = NULL;
 549   PAVISTREAM          pStream;
 550   DWORD               startPos, endPos, streamNr, n, nStreams;
 551
 552   TRACE("(%p,%p,%p,%p,%ld,%ld)\n",iface,plStart,plLength,
 553         pSource,lStart,lLength);
 554
 555   if (pSource == NULL)
 556     return AVIERR_BADHANDLE;
 557   if (plStart == NULL || *plStart < 0)
 558     return AVIERR_BADPARAM;
 559   if (This->sInfo.dwStart + This->sInfo.dwLength < *plStart)
 560     return AVIERR_BADPARAM; /* Can't paste with holes */
 561   if (FAILED(IAVIStream_Info(pSource, &srcInfo, sizeof(srcInfo))))
 562     return AVIERR_ERROR;
 563   if (lStart < srcInfo.dwStart || lStart >= srcInfo.dwStart + srcInfo.dwLength)
 564     return AVIERR_BADPARAM;
 565   if (This->sInfo.fccType == 0) {
 566     /* This stream is empty */
 567     IAVIStream_Info(pSource, &This->sInfo, sizeof(This->sInfo));
 568     This->sInfo.dwStart  = *plStart;
 569     This->sInfo.dwLength = 0;
 570   }
 571   if (This->sInfo.fccType != srcInfo.fccType)
 572     return AVIERR_UNSUPPORTED; /* different stream types */
 573   if (lLength == -1) /* Copy the hole stream */
 574     lLength = srcInfo.dwLength;
 575   if (lStart + lLength > srcInfo.dwStart + srcInfo.dwLength)
 576     lLength = srcInfo.dwStart + srcInfo.dwLength - lStart;
 577   if (lLength + *plStart >= 0x80000000)
 578     return AVIERR_MEMORY;
 579
 580   /* streamtype specific tests */
 581   if (srcInfo.fccType == streamtypeVIDEO) {
 582     DWORD size;
 583
 584     size = srcInfo.rcFrame.right - srcInfo.rcFrame.left;
 585     if (size != This->sInfo.rcFrame.right - This->sInfo.rcFrame.left)
 586       return AVIERR_UNSUPPORTED; /* FIXME: Can't GetFrame convert it? */
 587     size = srcInfo.rcFrame.bottom - srcInfo.rcFrame.top;
 588     if (size != This->sInfo.rcFrame.bottom - This->sInfo.rcFrame.top)
 589       return AVIERR_UNSUPPORTED; /* FIXME: Can't GetFrame convert it? */
 590   } else if (srcInfo.fccType == streamtypeAUDIO) {
 591     if (! AVIFILE_FormatsEqual((PAVISTREAM)&This->iAVIStream, pSource))
 592       return AVIERR_UNSUPPORTED;
 593   } else {
 594     /* FIXME: streamtypeMIDI and streamtypeTEXT */
 595     return AVIERR_UNSUPPORTED;
 596   }
 597
 598   /* try to get an IEditStreamInternal interface */
 599   if (SUCCEEDED(IAVIStream_QueryInterface(pSource, &IID_IEditStreamInternal,
 600                                           (LPVOID*)&pInternal))) {
 601     pInternal->lpVtbl->GetEditStreamImpl(pInternal, (LPVOID*)&pEdit);
 602     pInternal->lpVtbl->Release(pInternal);
 603   }
 604
 605   /* for video must check for change of format */
 606   if (This->sInfo.fccType == streamtypeVIDEO) {
 607     if (! This->bDecompress) {
 608       /* Need to decompress if any of the following conditions matches:
 609        *  - pSource is an editable stream which decompresses
 610        *  - the nearest keyframe of pSource isn't lStart
 611        *  - the nearest keyframe of this stream isn't *plStart
 612        *  - the format of pSource doesn't match this one
 613        */
 614       if ((pEdit != NULL && pEdit->bDecompress) ||
 615           AVIStreamNearestKeyFrame(pSource, lStart) != lStart ||
 616           AVIStreamNearestKeyFrame((PAVISTREAM)&This->iAVIStream, *plStart) != *plStart ||
 617           (This->nStreams > 0 && !AVIFILE_FormatsEqual((PAVISTREAM)&This->iAVIStream, pSource))) {
 618         /* Use first stream part to get format to convert everything to */
 619         AVIFILE_ReadFrame(This, This->pStreams[0].pStream,
 620                           This->pStreams[0].dwStart);
 621
 622         /* Check if we could convert the source streams to the disired format... */
 623         if (pEdit != NULL) {
 624           if (FAILED(AVIFILE_FindStreamInTable(pEdit, lStart, &pStream,
 625                                                &startPos, &streamNr, TRUE)))
 626             return AVIERR_INTERNAL;
 627           for (n = lStart; n < lStart + lLength; streamNr++) {
 628             if (AVIFILE_ReadFrame(This, pEdit->pStreams[streamNr].pStream, startPos) == NULL)
 629               return AVIERR_BADFORMAT;
 630             startPos = pEdit->pStreams[streamNr].dwStart;
 631             n += pEdit->pStreams[streamNr].dwLength;
 632           }
 633         } else if (AVIFILE_ReadFrame(This, pSource, lStart) == NULL)
 634           return AVIERR_BADFORMAT;
 635
 636         This->bDecompress      = TRUE;
 637         This->sInfo.fccHandler = 0;
 638       }
 639     } else if (AVIFILE_ReadFrame(This, pSource, lStart) == NULL)
 640       return AVIERR_BADFORMAT; /* Can't convert source to own format */
 641   } /* FIXME: something special for the other formats? */
 642
 643   /* Make sure we have enough memory for parts */
 644   if (pEdit != NULL) {
 645     DWORD nLastStream;
 646
 647     AVIFILE_FindStreamInTable(pEdit, lStart + lLength, &pStream,
 648                               &endPos, &nLastStream, TRUE);
 649     AVIFILE_FindStreamInTable(pEdit, lStart, &pStream,
 650                               &startPos, &streamNr, FALSE);
 651     if (nLastStream == streamNr)
 652       nLastStream++;
 653
 654     nStreams = nLastStream - streamNr;
 655   } else
 656     nStreams = 1;
 657   if (This->nStreams + nStreams + 1 > This->nTableSize) {
 658     n = This->nStreams + nStreams + 33;
 659
 660     This->pStreams =
 661       GlobalReAllocPtr(This->pStreams, n * sizeof(EditStreamTable), GMEM_SHARE|GHND);
 662     if (This->pStreams == NULL)
 663       return AVIERR_MEMORY;
 664     This->nTableSize = n;
 665   }
 666
 667   if (plLength != NULL)
 668     *plLength = lLength;
 669
 670   /* now do the real work */
 671   if (This->sInfo.dwStart + This->sInfo.dwLength > *plStart) {
 672     AVIFILE_FindStreamInTable(This, *plStart, &pStream,
 673                               &startPos, &streamNr, FALSE);
 674     if (startPos != This->pStreams[streamNr].dwStart) {
 675       /* split stream streamNr at startPos */
 676       memmove(This->pStreams + streamNr + nStreams + 1,
 677               This->pStreams + streamNr,
 678               (This->nStreams + nStreams - streamNr + 1) * sizeof(EditStreamTable));
 679
 680       This->pStreams[streamNr + 2].dwLength =
 681         EditStreamEnd(This, streamNr + 2) - startPos;
 682       This->pStreams[streamNr + 2].dwStart = startPos;
 683       This->pStreams[streamNr].dwLength =
 684         startPos - This->pStreams[streamNr].dwStart;
 685       IAVIStream_AddRef(This->pStreams[streamNr].pStream);
 686       streamNr++;
 687     } else {
 688       /* insert before stream at streamNr */
 689       memmove(This->pStreams + streamNr + nStreams, This->pStreams + streamNr,
 690               (This->nStreams + nStreams - streamNr) * sizeof(EditStreamTable));
 691     }
 692   } else /* append the streams */
 693     streamNr = This->nStreams;
 694
 695   if (pEdit != NULL) {
 696     /* insert the parts of the editable stream instead of itself */
 697     AVIFILE_FindStreamInTable(pEdit, lStart + lLength, &pStream,
 698                               &endPos, NULL, FALSE);
 699     AVIFILE_FindStreamInTable(pEdit, lStart, &pStream, &startPos, &n, FALSE);
 700
 701     memcpy(This->pStreams + streamNr, pEdit->pStreams + n,
 702            nStreams * sizeof(EditStreamTable));
 703     if (This->pStreams[streamNr].dwStart < startPos) {
 704       This->pStreams[streamNr].dwLength =
 705         EditStreamEnd(This, streamNr) - startPos;
 706       This->pStreams[streamNr].dwStart  = startPos;
 707     }
 708     if (endPos < EditStreamEnd(This, streamNr + nStreams))
 709       This->pStreams[streamNr + nStreams].dwLength =
 710         endPos - This->pStreams[streamNr + nStreams].dwStart;
 711   } else {
 712     /* a simple stream */
 713     This->pStreams[streamNr].pStream  = pSource;
 714     This->pStreams[streamNr].dwStart  = lStart;
 715     This->pStreams[streamNr].dwLength = lLength;
 716   }
 717
 718   for (n = 0; n < nStreams; n++) {
 719     IAVIStream_AddRef(This->pStreams[streamNr + n].pStream);
 720     if (0 < streamNr + n &&
 721         This->pStreams[streamNr + n - 1].pStream != This->pStreams[streamNr + n].pStream) {
 722       This->sInfo.dwFlags |= AVISTREAMINFO_FORMATCHANGES;
 723       This->sInfo.dwFormatChangeCount++;
 724     }
 725   }
 726   This->sInfo.dwEditCount++;
 727   This->sInfo.dwLength += lLength;
 728   This->nStreams += nStreams;
 729
 730   return AVIERR_OK;
 731 }
 732
 733 static HRESULT WINAPI IAVIEditStream_fnClone(IAVIEditStream*iface,
 734                                              PAVISTREAM*ppResult)
 735 {
 736   ICOM_THIS(IAVIEditStreamImpl,iface);
 737   IAVIEditStreamImpl* pEdit;
 738   DWORD i;
 739
 740   TRACE("(%p,%p)\n",iface,ppResult);
 741
 742   if (ppResult == NULL)
 743     return AVIERR_BADPARAM;
 744   *ppResult = NULL;
 745
 746   pEdit = (IAVIEditStreamImpl*)AVIFILE_CreateEditStream(NULL);
 747   if (pEdit == NULL)
 748     return AVIERR_MEMORY;
 749   if (This->nStreams > pEdit->nTableSize) {
 750     pEdit->pStreams = GlobalReAllocPtr(pEdit->pStreams, This->nStreams * sizeof(EditStreamTable),GMEM_SHARE|GHND);
 751     if (pEdit->pStreams == NULL)
 752       return AVIERR_MEMORY;
 753     pEdit->nTableSize = This->nStreams;
 754   }
 755   pEdit->nStreams = This->nStreams;
 756   memcpy(pEdit->pStreams, This->pStreams,
 757          This->nStreams * sizeof(EditStreamTable));
 758   memcpy(&pEdit->sInfo,&This->sInfo,sizeof(This->sInfo));
 759   for (i = 0; i < This->nStreams; i++) {
 760     if (pEdit->pStreams[i].pStream != NULL)
 761       IAVIStream_AddRef(pEdit->pStreams[i].pStream);
 762   }
 763
 764   *ppResult = (PAVISTREAM)&pEdit->iAVIStream;
 765
 766   return AVIERR_OK;
 767 }
 768
 769 static HRESULT WINAPI IAVIEditStream_fnSetInfo(IAVIEditStream*iface,
 770                                                LPAVISTREAMINFOW asi,LONG size)
 771 {
 772   ICOM_THIS(IAVIEditStreamImpl,iface);
 773
 774   TRACE("(%p,%p,%ld)\n",iface,asi,size);
 775
 776   /* check parameters */
 777   if (asi == NULL)
 778     return AVIERR_BADPARAM;
 779   if (size != sizeof(AVISTREAMINFOW))
 780     return AVIERR_BADSIZE;
 781   if (asi->dwScale == 0 || asi->dwRate == 0 || (LONG)asi->dwQuality < -1 ||
 782       asi->dwQuality > ICQUALITY_HIGH)
 783     return AVIERR_ERROR;
 784
 785   This->sInfo.wLanguage = asi->wLanguage;
 786   This->sInfo.wPriority = asi->wPriority;
 787   This->sInfo.dwStart   = asi->dwStart;
 788   if (asi->dwRate != 0)
 789     This->sInfo.dwRate  = asi->dwRate;
 790   if (asi->dwScale != 0)
 791     This->sInfo.dwScale = asi->dwScale;
 792   if (asi->dwQuality <= ICQUALITY_HIGH)
 793     This->sInfo.dwQuality = ICQUALITY_HIGH;
 794   CopyRect(&This->sInfo.rcFrame, &asi->rcFrame);
 795   memcpy(&This->sInfo.szName, &asi->szName, sizeof(asi->szName));
 796   This->sInfo.dwEditCount++;
 797
 798   return AVIERR_OK;
 799 }
 800
 801 static HRESULT WINAPI IEditAVIStream_fnQueryInterface(IAVIStream*iface,
 802                                                       REFIID refiid,LPVOID*obj)
 803 {
 804   ICOM_THIS(IEditAVIStreamImpl,iface);
 805
 806   assert(This->pae != NULL);
 807
 808   return IAVIEditStream_QueryInterface((IAVIEditStream*)This->pae,refiid,obj);
 809 }
 810
 811 static ULONG   WINAPI IEditAVIStream_fnAddRef(IAVIStream*iface)
 812 {
 813   ICOM_THIS(IEditAVIStreamImpl,iface);
 814
 815   assert(This->pae != NULL);
 816
 817   return IAVIEditStream_AddRef((IAVIEditStream*)This->pae);
 818 }
 819
 820 static ULONG   WINAPI IEditAVIStream_fnRelease(IAVIStream*iface)
 821 {
 822   ICOM_THIS(IEditAVIStreamImpl,iface);
 823
 824   assert(This->pae != NULL);
 825
 826   return IAVIEditStream_Release((IAVIEditStream*)This->pae);
 827 }
 828
 829 static HRESULT WINAPI IEditAVIStream_fnCreate(IAVIStream*iface,
 830                                               LPARAM lParam1,LPARAM lParam2)
 831 {
 832   IAVIEditStreamImpl *This = ((IEditAVIStreamImpl*)iface)->pae;
 833
 834   if (lParam2 != 0)
 835     return AVIERR_ERROR;
 836
 837   if (This->pStreams == NULL) {
 838     This->pStreams =
 839       GlobalAllocPtr(GMEM_SHARE|GHND, 256 * sizeof(EditStreamTable));
 840     if (This->pStreams == NULL)
 841       return AVIERR_MEMORY;
 842     This->nTableSize = 256;
 843   }
 844
 845   if (lParam1 != 0) {
 846     IAVIStream_Info((PAVISTREAM)lParam1, &This->sInfo, sizeof(This->sInfo));
 847     IAVIStream_AddRef((PAVISTREAM)lParam1);
 848     This->pStreams[0].pStream  = (PAVISTREAM)lParam1;
 849     This->pStreams[0].dwStart  = This->sInfo.dwStart;
 850     This->pStreams[0].dwLength = This->sInfo.dwLength;
 851     This->nStreams = 1;
 852   }
 853   return AVIERR_OK;
 854 }
 855
 856 static HRESULT WINAPI IEditAVIStream_fnInfo(IAVIStream*iface,
 857                                             AVISTREAMINFOW *psi,LONG size)
 858 {
 859   ICOM_THIS(IEditAVIStreamImpl,iface);
 860
 861   TRACE("(%p,%p,%ld)\n",iface,psi,size);
 862
 863   assert(This->pae != NULL);
 864
 865   if (psi == NULL)
 866     return AVIERR_BADPARAM;
 867   if (size < 0)
 868     return AVIERR_BADSIZE;
 869
 870   if (This->pae->bDecompress)
 871     This->pae->sInfo.fccHandler = 0;
 872
 873   memcpy(psi, &This->pae->sInfo, min((DWORD)size, sizeof(This->pae->sInfo)));
 874
 875   if ((DWORD)size < sizeof(This->pae->sInfo))
 876     return AVIERR_BUFFERTOOSMALL;
 877   return AVIERR_OK;
 878 }
 879
 880 static LONG    WINAPI IEditAVIStream_fnFindSample(IAVIStream*iface,LONG pos,
 881                                                   LONG flags)
 882 {
 883   IAVIEditStreamImpl* const This = ((IEditAVIStreamImpl* const)iface)->pae;
 884   PAVISTREAM stream;
 885   DWORD      streamPos, streamNr;
 886
 887   TRACE("(%p,%ld,0x%08lX)\n",iface,pos,flags);
 888
 889   if (flags & FIND_FROM_START)
 890     pos = (LONG)This->sInfo.dwStart;
 891
 892   /* outside of stream? */
 893   if (pos < (LONG)This->sInfo.dwStart ||
 894       (LONG)This->sInfo.dwStart + (LONG)This->sInfo.dwLength <= pos)
 895     return -1;
 896
 897   /* map our position to a stream and position in it */
 898   if (AVIFILE_FindStreamInTable(This, pos, &stream, &streamPos,
 899                                 &streamNr, TRUE))
 900     return -1; /* doesn't exist */
 901
 902   if (This->bDecompress) {
 903     /* only one stream -- format changes only at start */
 904     if (flags & FIND_FORMAT)
 905       return (flags & FIND_NEXT ? -1 : 0);
 906
 907     /* FIXME: map positions back to us */
 908     return IAVIStream_FindSample(stream, streamPos, flags);
 909   } else {
 910     /* assume change of format every frame */
 911     return pos;
 912   }
 913 }
 914
 915 static HRESULT WINAPI IEditAVIStream_fnReadFormat(IAVIStream*iface,LONG pos,
 916                                                   LPVOID format,LONG*fmtsize)
 917 {
 918   IAVIEditStreamImpl* const This = ((IEditAVIStreamImpl* const)iface)->pae;
 919   LPBITMAPINFOHEADER  lp;
 920   PAVISTREAM          stream;
 921   DWORD               n;
 922   HRESULT             hr;
 923
 924   TRACE("(%p,%ld,%p,%p)\n",iface,pos,format,fmtsize);
 925
 926   if (fmtsize == NULL || pos < This->sInfo.dwStart ||
 927       This->sInfo.dwStart + This->sInfo.dwLength <= pos)
 928     return AVIERR_BADPARAM;
 929
 930   /* find stream corresponding to position */
 931   hr = AVIFILE_FindStreamInTable(This, pos, &stream, &n, NULL, FALSE);
 932   if (FAILED(hr))
 933     return hr;
 934
 935   if (! This->bDecompress)
 936     return IAVIStream_ReadFormat(stream, n, format, fmtsize);
 937
 938   lp = (LPBITMAPINFOHEADER)AVIFILE_ReadFrame(This, stream, n);
 939   if (lp == NULL)
 940     return AVIERR_ERROR;
 941   if (lp->biBitCount <= 8) {
 942     n  = (lp->biClrUsed > 0 ? lp->biClrUsed : 1 << lp->biBitCount);
 943     n *= sizeof(RGBQUAD);
 944   } else
 945     n = 0;
 946   n += lp->biSize;
 947
 948   memcpy(format, lp, min((LONG)n, *fmtsize));
 949   hr = ((LONG)n > *fmtsize ? AVIERR_BUFFERTOOSMALL : AVIERR_OK);
 950   *fmtsize = n;
 951
 952   return hr;
 953 }
 954
 955 static HRESULT WINAPI IEditAVIStream_fnSetFormat(IAVIStream*iface,LONG pos,
 956                                                  LPVOID format,LONG formatsize)
 957 {
 958   TRACE("(%p,%ld,%p,%ld)\n",iface,pos,format,formatsize);
 959
 960   return AVIERR_UNSUPPORTED;
 961 }
 962
 963 static HRESULT WINAPI IEditAVIStream_fnRead(IAVIStream*iface,LONG start,
 964                                             LONG samples,LPVOID buffer,
 965                                             LONG buffersize,LONG*bytesread,
 966                                             LONG*samplesread)
 967 {
 968   IAVIEditStreamImpl* const This = ((IEditAVIStreamImpl* const)iface)->pae;
 969   PAVISTREAM stream;
 970   DWORD   streamPos, streamNr;
 971   LONG    readBytes, readSamples, count;
 972   HRESULT hr;
 973
 974   TRACE("(%p,%ld,%ld,%p,%ld,%p,%p) -- 0x%08lX\n",iface,start,samples,
 975         buffer,buffersize,bytesread,samplesread,This->sInfo.fccType);
 976
 977   /* check parameters */
 978   if (bytesread != NULL)
 979     *bytesread = 0;
 980   if (samplesread != NULL)
 981     *samplesread = 0;
 982   if (buffersize < 0)
 983     return AVIERR_BADSIZE;
 984   if ((DWORD)start < This->sInfo.dwStart ||
 985       This->sInfo.dwStart + This->sInfo.dwLength < (DWORD)start)
 986     return AVIERR_BADPARAM;
 987
 988   if (! This->bDecompress) {
 989     /* audio like data -- sample-based */
 990     do {
 991       if (samples == 0)
 992         return AVIERR_OK; /* nothing at all or already done */
 993
 994       if (FAILED(AVIFILE_FindStreamInTable(This, start, &stream,
 995                                            &streamPos, &streamNr, FALSE)))
 996         return AVIERR_ERROR;
 997
 998       /* limit to end of the stream */
 999       count = samples;
1000       if (streamPos + count > EditStreamEnd(This, streamNr))
1001         count = EditStreamEnd(This, streamNr) - streamPos;
1002
1003       hr = IAVIStream_Read(stream, streamPos, count, buffer, buffersize,
1004                            &readBytes, &readSamples);
1005       if (FAILED(hr))
1006         return hr;
1007       if (readBytes == 0 && readSamples == 0 && count != 0)
1008         return AVIERR_FILEREAD; /* for bad stream implementations */
1009
1010       if (samplesread != NULL)
1011         *samplesread += readSamples;
1012       if (bytesread != NULL)
1013         *bytesread += readBytes;
1014       if (buffer != NULL) {
1015         (LPBYTE)buffer += readBytes;
1016         buffersize     -= readBytes;
1017       }
1018       start   += count;
1019       samples -= count;
1020     } while (This->sInfo.dwStart + This->sInfo.dwLength > start);
1021   } else {
1022     /* video like data -- frame-based */
1023     LPBITMAPINFOHEADER lp;
1024
1025     if (samples == 0)
1026       return AVIERR_OK;
1027
1028     if (FAILED(AVIFILE_FindStreamInTable(This, start, &stream,
1029                                          &streamPos, &streamNr, FALSE)))
1030       return AVIERR_ERROR;
1031
1032     lp = AVIFILE_ReadFrame(This, stream, streamPos);
1033     if (lp == NULL)
1034       return AVIERR_ERROR;
1035
1036     if (buffer != NULL) {
1037       /* need size of format to skip */
1038       if (lp->biBitCount <= 8) {
1039         count  = lp->biClrUsed > 0 ? lp->biClrUsed : 1 << lp->biBitCount;
1040         count *= sizeof(RGBQUAD);
1041       } else
1042         count = 0;
1043       count += lp->biSize;
1044
1045       if (buffersize < lp->biSizeImage)
1046         return AVIERR_BUFFERTOOSMALL;
1047       memcpy(buffer, (LPBYTE)lp + count, lp->biSizeImage);
1048     }
1049
1050     if (bytesread != NULL)
1051       *bytesread = lp->biSizeImage;
1052     if (samplesread != NULL)
1053       *samplesread = 1;
1054   }
1055
1056   return AVIERR_OK;
1057 }
1058
1059 static HRESULT WINAPI IEditAVIStream_fnWrite(IAVIStream*iface,LONG start,
1060                                              LONG samples,LPVOID buffer,
1061                                              LONG buffersize,DWORD flags,
1062                                              LONG*sampwritten,LONG*byteswritten)
1063 {
1064   TRACE("(%p,%ld,%ld,%p,%ld,0x%08lX,%p,%p)\n",iface,start,samples,buffer,
1065         buffersize,flags,sampwritten,byteswritten);
1066
1067   /* be sure return parameters have correct values */
1068   if (sampwritten != NULL)
1069     *sampwritten = 0;
1070   if (byteswritten != NULL)
1071     *byteswritten = 0;
1072
1073   return AVIERR_UNSUPPORTED;
1074 }
1075
1076 static HRESULT WINAPI IEditAVIStream_fnDelete(IAVIStream*iface,LONG start,
1077                                               LONG samples)
1078 {
1079   ICOM_THIS(IEditAVIStreamImpl,iface);
1080
1081   TRACE("(%p,%ld,%ld)\n",iface,start,samples);
1082
1083   return IAVIEditStream_Cut((IAVIEditStream*)This->pae,&start,&samples,NULL);
1084 }
1085
1086 static HRESULT WINAPI IEditAVIStream_fnReadData(IAVIStream*iface,DWORD fcc,
1087                                                 LPVOID lp,LONG *lpread)
1088 {
1089   IAVIEditStreamImpl* const This = ((IEditAVIStreamImpl* const)iface)->pae;
1090   DWORD n;
1091
1092   TRACE("(%p,0x%08lX,%p,%p)\n",iface,fcc,lp,lpread);
1093
1094   /* check parameters */
1095   if (lp == NULL || lpread == NULL)
1096     return AVIERR_BADPARAM;
1097
1098   /* simply ask every stream and return the first block found */
1099   for (n = 0; n < This->nStreams; n++) {
1100     HRESULT hr = IAVIStream_ReadData(This->pStreams[n].pStream,fcc,lp,lpread);
1101
1102     if (SUCCEEDED(hr))
1103       return hr;
1104   }
1105
1106   *lpread = 0;
1107   return AVIERR_NODATA;
1108 }
1109
1110 static HRESULT WINAPI IEditAVIStream_fnWriteData(IAVIStream*iface,DWORD fcc,
1111                                                  LPVOID lp,LONG size)
1112 {
1113   TRACE("(%p,0x%08lX,%p,%ld)\n",iface,fcc,lp,size);
1114
1115   return AVIERR_UNSUPPORTED;
1116 }
1117
1118 static HRESULT WINAPI IEditAVIStream_fnSetInfo(IAVIStream*iface,
1119                                                AVISTREAMINFOW*info,LONG len)
1120 {
1121   ICOM_THIS(IEditAVIStreamImpl,iface);
1122
1123   TRACE("(%p,%p,%ld)\n",iface,info,len);
1124
1125   return IAVIEditStream_SetInfo((IAVIEditStream*)This->pae,info,len);
1126 }
1127
1128 static HRESULT WINAPI IEditStreamInternal_fnQueryInterface(IEditStreamInternal*iface,REFIID refiid,LPVOID*obj)
1129 {
1130   ICOM_THIS(IEditStreamInternalImpl,iface);
1131
1132   assert(This->pae != NULL);
1133
1134   return IAVIEditStream_QueryInterface((IAVIEditStream*)This->pae, refiid, obj);
1135 }
1136
1137 static ULONG   WINAPI IEditStreamInternal_fnAddRef(IEditStreamInternal*iface)
1138 {
1139   ICOM_THIS(IEditStreamInternalImpl,iface);
1140
1141   assert(This->pae != NULL);
1142
1143   return IAVIEditStream_AddRef((IAVIEditStream*)This->pae);
1144 }
1145
1146 static ULONG   WINAPI IEditStreamInternal_fnRelease(IEditStreamInternal*iface)
1147 {
1148   ICOM_THIS(IEditStreamInternalImpl,iface);
1149
1150   assert(This->pae != NULL);
1151
1152   return IAVIEditStream_Release((IAVIEditStream*)This->pae);
1153 }
1154
1155 static HRESULT  WINAPI IEditStreamInternal_fnGetEditStreamImpl(IEditStreamInternal*iface,LPVOID*ppimpl)
1156 {
1157   ICOM_THIS(IEditStreamInternalImpl,iface);
1158
1159   TRACE("(%p,%p) -> %p\n", iface, ppimpl, This->pae);
1160
1161   assert(This->pae != NULL);
1162   assert(ppimpl != NULL);
1163
1164   *ppimpl = This->pae;
1165   return AVIERR_OK;
1166 }