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 DECLARE_INTERFACE_(IEditStreamInternal,IUnknown)
  53 {
  54     /*** IUnknown methods ***/
  55     STDMETHOD_(HRESULT,QueryInterface)(THIS_ REFIID riid, void** ppvObject) PURE;
  56     STDMETHOD_(ULONG,AddRef)(THIS) PURE;
  57     STDMETHOD_(ULONG,Release)(THIS) PURE;
  58     /*** IEditStreamInternal methods ***/
  59     STDMETHOD(GetEditStreamImpl)(THIS_ LPVOID*) PURE;
  60 };
  61 #undef INTERFACE
  62
  63 #define EditStreamEnd(This,streamNr) ((This)->pStreams[streamNr].dwStart + \
  64                                       (This)->pStreams[streamNr].dwLength)
  65
  66 /***********************************************************************/
  67
  68 static HRESULT WINAPI IAVIEditStream_fnQueryInterface(IAVIEditStream*iface,REFIID refiid,LPVOID *obj);
  69 static ULONG   WINAPI IAVIEditStream_fnAddRef(IAVIEditStream*iface);
  70 static ULONG   WINAPI IAVIEditStream_fnRelease(IAVIEditStream*iface);
  71 static HRESULT WINAPI IAVIEditStream_fnCut(IAVIEditStream*iface,LONG*plStart,
  72                                            LONG*plLength,PAVISTREAM*ppResult);
  73 static HRESULT WINAPI IAVIEditStream_fnCopy(IAVIEditStream*iface,LONG*plStart,
  74                                             LONG*plLength,PAVISTREAM*ppResult);
  75 static HRESULT WINAPI IAVIEditStream_fnPaste(IAVIEditStream*iface,LONG*plStart,
  76                                              LONG*plLength,PAVISTREAM pSource,
  77                                              LONG lStart,LONG lEnd);
  78 static HRESULT WINAPI IAVIEditStream_fnClone(IAVIEditStream*iface,
  79                                              PAVISTREAM*ppResult);
  80 static HRESULT WINAPI IAVIEditStream_fnSetInfo(IAVIEditStream*iface,
  81                                                LPAVISTREAMINFOW asi,LONG size);
  82
  83 struct IAVIEditStreamVtbl ieditstream = {
  84   IAVIEditStream_fnQueryInterface,
  85   IAVIEditStream_fnAddRef,
  86   IAVIEditStream_fnRelease,
  87   IAVIEditStream_fnCut,
  88   IAVIEditStream_fnCopy,
  89   IAVIEditStream_fnPaste,
  90   IAVIEditStream_fnClone,
  91   IAVIEditStream_fnSetInfo
  92 };
  93
  94 static HRESULT WINAPI IEditAVIStream_fnQueryInterface(IAVIStream*iface,REFIID refiid,LPVOID*obj);
  95 static ULONG   WINAPI IEditAVIStream_fnAddRef(IAVIStream*iface);
  96 static ULONG   WINAPI IEditAVIStream_fnRelease(IAVIStream*iface);
  97 static HRESULT WINAPI IEditAVIStream_fnCreate(IAVIStream*iface,LPARAM lParam1,LPARAM lParam2);
  98 static HRESULT WINAPI IEditAVIStream_fnInfo(IAVIStream*iface,AVISTREAMINFOW *psi,LONG size);
  99 static LONG    WINAPI IEditAVIStream_fnFindSample(IAVIStream*iface,LONG pos,
 100                                                   LONG flags);
 101 static HRESULT WINAPI IEditAVIStream_fnReadFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG*formatsize);
 102 static HRESULT WINAPI IEditAVIStream_fnSetFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG formatsize);
 103 static HRESULT WINAPI IEditAVIStream_fnRead(IAVIStream*iface,LONG start,
 104                                             LONG samples,LPVOID buffer,
 105                                             LONG buffersize,LONG*bytesread,
 106                                             LONG*samplesread);
 107 static HRESULT WINAPI IEditAVIStream_fnWrite(IAVIStream*iface,LONG start,
 108                                              LONG samples,LPVOID buffer,
 109                                              LONG buffersize,DWORD flags,
 110                                              LONG*sampwritten,LONG*byteswritten);
 111 static HRESULT WINAPI IEditAVIStream_fnDelete(IAVIStream*iface,LONG start,LONG samples);
 112 static HRESULT WINAPI IEditAVIStream_fnReadData(IAVIStream*iface,DWORD fcc,
 113                                                 LPVOID lp,LONG *lpread);
 114 static HRESULT WINAPI IEditAVIStream_fnWriteData(IAVIStream*iface,DWORD fcc,
 115                                                  LPVOID lp,LONG size);
 116 static HRESULT WINAPI IEditAVIStream_fnSetInfo(IAVIStream*iface,AVISTREAMINFOW*info,LONG infolen);
 117
 118 struct IAVIStreamVtbl ieditstast = {
 119   IEditAVIStream_fnQueryInterface,
 120   IEditAVIStream_fnAddRef,
 121   IEditAVIStream_fnRelease,
 122   IEditAVIStream_fnCreate,
 123   IEditAVIStream_fnInfo,
 124   IEditAVIStream_fnFindSample,
 125   IEditAVIStream_fnReadFormat,
 126   IEditAVIStream_fnSetFormat,
 127   IEditAVIStream_fnRead,
 128   IEditAVIStream_fnWrite,
 129   IEditAVIStream_fnDelete,
 130   IEditAVIStream_fnReadData,
 131   IEditAVIStream_fnWriteData,
 132   IEditAVIStream_fnSetInfo
 133 };
 134
 135 static HRESULT WINAPI IEditStreamInternal_fnQueryInterface(IEditStreamInternal*iface,REFIID refiid,LPVOID*obj);
 136 static ULONG   WINAPI IEditStreamInternal_fnAddRef(IEditStreamInternal*iface);
 137 static ULONG   WINAPI IEditStreamInternal_fnRelease(IEditStreamInternal*iface);
 138 static HRESULT WINAPI IEditStreamInternal_fnGetEditStreamImpl(IEditStreamInternal*iface,LPVOID*ppimpl);
 139
 140 struct IEditStreamInternalVtbl ieditstreaminternal = {
 141   IEditStreamInternal_fnQueryInterface,
 142   IEditStreamInternal_fnAddRef,
 143   IEditStreamInternal_fnRelease,
 144   IEditStreamInternal_fnGetEditStreamImpl
 145 };
 146
 147 typedef struct _IAVIEditStreamImpl IAVIEditStreamImpl;
 148
 149 typedef struct _IEditAVIStreamImpl {
 150   /* IUnknown stuff */
 151   IAVIStreamVtbl *lpVtbl;
 152
 153   /* IAVIStream stuff */
 154   IAVIEditStreamImpl *pae;
 155 } IEditAVIStreamImpl;
 156
 157 typedef struct _IEditStreamInternalImpl {
 158   /* IUnknown stuff */
 159   IEditStreamInternalVtbl *lpVtbl;
 160
 161   /* IEditStreamInternal stuff */
 162   IAVIEditStreamImpl *pae;
 163 } IEditStreamInternalImpl;
 164
 165 struct _IAVIEditStreamImpl {
 166   /* IUnknown stuff */
 167   IAVIEditStreamVtbl *lpVtbl;
 168   DWORD  ref;
 169
 170   /* IAVIEditStream stuff */
 171   IEditAVIStreamImpl      iAVIStream;
 172   IEditStreamInternalImpl iEditStreamInternal;
 173
 174   AVISTREAMINFOW       sInfo;
 175
 176   EditStreamTable     *pStreams;
 177   DWORD                nStreams;   /* current fill level of pStreams table */
 178   DWORD                nTableSize; /* size of pStreams table */
 179
 180   BOOL                 bDecompress;
 181   PAVISTREAM           pCurStream;
 182   PGETFRAME            pg;         /* IGetFrame for pCurStream */
 183   LPBITMAPINFOHEADER   lpFrame;    /* frame of pCurStream */
 184 };
 185
 186 /***********************************************************************/
 187
 188 PAVIEDITSTREAM AVIFILE_CreateEditStream(PAVISTREAM pstream)
 189 {
 190   IAVIEditStreamImpl *pedit = NULL;
 191
 192   pedit = (IAVIEditStreamImpl*)LocalAlloc(LPTR,sizeof(IAVIEditStreamImpl));
 193   if (pedit == NULL)
 194     return NULL;
 195
 196   pedit->lpVtbl            = &ieditstream;
 197   pedit->iAVIStream.lpVtbl = &ieditstast;
 198   pedit->iAVIStream.pae    = pedit;
 199   pedit->iEditStreamInternal.lpVtbl = &ieditstreaminternal;
 200   pedit->iEditStreamInternal.pae    = pedit;
 201   pedit->ref = 1;
 202
 203   IAVIStream_Create((PAVISTREAM)&pedit->iAVIStream,(LPARAM)pstream,0);
 204
 205   return (PAVIEDITSTREAM)pedit;
 206 }
 207
 208 static HRESULT AVIFILE_FindStreamInTable(IAVIEditStreamImpl* const This,
 209                                          DWORD pos,PAVISTREAM *ppStream,
 210                                          DWORD* streamPos,
 211                                          DWORD* streamNr,BOOL bFindSample)
 212 {
 213   DWORD n;
 214
 215   TRACE("(%p,%lu,%p,%p,%p,%d)\n",This,pos,ppStream,streamPos,
 216         streamNr,bFindSample);
 217
 218   if (pos < This->sInfo.dwStart)
 219     return AVIERR_BADPARAM;
 220
 221   pos -= This->sInfo.dwStart;
 222   for (n = 0; n < This->nStreams; n++) {
 223     if (pos < This->pStreams[n].dwLength) {
 224       *ppStream  = This->pStreams[n].pStream;
 225       *streamPos = This->pStreams[n].dwStart + pos;
 226       if (streamNr != NULL)
 227         *streamNr = n;
 228
 229       return AVIERR_OK;
 230     }
 231     pos -= This->pStreams[n].dwLength;
 232   }
 233   if (pos == 0 && bFindSample) {
 234     *ppStream  = This->pStreams[--n].pStream;
 235     *streamPos = EditStreamEnd(This, n);
 236     if (streamNr != NULL)
 237       *streamNr = n;
 238
 239     TRACE(" -- pos=0 && b=1 -> (%p,%lu,%lu)\n",*ppStream, *streamPos, n);
 240     return AVIERR_OK;
 241   } else {
 242     *ppStream = NULL;
 243     *streamPos = 0;
 244     if (streamNr != NULL)
 245       *streamNr = 0;
 246
 247     TRACE(" -> ERROR (NULL,0,0)\n");
 248     return AVIERR_BADPARAM;
 249   }
 250 }
 251
 252 static LPVOID AVIFILE_ReadFrame(IAVIEditStreamImpl* const This,
 253                                 PAVISTREAM pstream, LONG pos)
 254 {
 255   PGETFRAME pg;
 256
 257   TRACE("(%p,%p,%ld)\n",This,pstream,pos);
 258
 259   if (pstream == NULL)
 260     return NULL;
 261
 262   /* if stream changes make sure that only palette changes */
 263   if (This->pCurStream != pstream) {
 264     pg = AVIStreamGetFrameOpen(pstream, NULL);
 265     if (pg == NULL)
 266       return NULL;
 267     if (This->pg != NULL) {
 268       if (IGetFrame_SetFormat(pg, This->lpFrame, NULL, 0, 0, -1, -1)) {
 269         AVIStreamGetFrameClose(pg);
 270         ERR(": IGetFrame_SetFormat failed\n");
 271         return NULL;
 272       }
 273       AVIStreamGetFrameClose(This->pg);
 274     }
 275     This->pg         = pg;
 276     This->pCurStream = pstream;
 277   }
 278
 279   /* now get the decompressed frame */
 280   This->lpFrame = AVIStreamGetFrame(This->pg, pos);
 281   if (This->lpFrame != NULL)
 282     This->sInfo.dwSuggestedBufferSize = This->lpFrame->biSizeImage;
 283
 284   return This->lpFrame;
 285 }
 286
 287 static HRESULT AVIFILE_RemoveStream(IAVIEditStreamImpl* const This, DWORD nr)
 288 {
 289   assert(This != NULL);
 290   assert(nr < This->nStreams);
 291
 292   /* remove part nr */
 293   IAVIStream_Release(This->pStreams[nr].pStream);
 294   This->nStreams--;
 295   if (This->nStreams - nr > 0) {
 296     memmove(This->pStreams + nr, This->pStreams + nr + 1,
 297             (This->nStreams - nr) * sizeof(EditStreamTable));
 298   }
 299   This->pStreams[This->nStreams].pStream  = NULL;
 300   This->pStreams[This->nStreams].dwStart  = 0;
 301   This->pStreams[This->nStreams].dwLength = 0;
 302
 303   /* try to merge the part before the deleted one and the one after it */
 304   if (0 < nr && 0 < This->nStreams &&
 305       This->pStreams[nr - 1].pStream == This->pStreams[nr].pStream) {
 306     if (EditStreamEnd(This, nr - 1) == This->pStreams[nr].dwStart) {
 307       This->pStreams[nr - 1].dwLength += This->pStreams[nr].dwLength;
 308       return AVIFILE_RemoveStream(This, nr);
 309     }
 310   }
 311
 312   return AVIERR_OK;
 313 }
 314
 315 static BOOL AVIFILE_FormatsEqual(PAVISTREAM avi1, PAVISTREAM avi2)
 316 {
 317   LPVOID fmt1 = NULL, fmt2 = NULL;
 318   LONG size1, size2, start1, start2;
 319   BOOL status = FALSE;
 320
 321   assert(avi1 != NULL && avi2 != NULL);
 322
 323   /* get stream starts and check format sizes */
 324   start1 = AVIStreamStart(avi1);
 325   start2 = AVIStreamStart(avi2);
 326   if (FAILED(AVIStreamFormatSize(avi1, start1, &size1)))
 327     return FALSE;
 328   if (FAILED(AVIStreamFormatSize(avi2, start2, &size2)))
 329     return FALSE;
 330   if (size1 != size2)
 331     return FALSE;
 332
 333   /* sizes match, now get formats and compare them */
 334   fmt1 = GlobalAllocPtr(GHND, size1);
 335   if (fmt1 == NULL)
 336     return FALSE;
 337   if (SUCCEEDED(AVIStreamReadFormat(avi1, start1, fmt1, &size1))) {
 338     fmt2 = GlobalAllocPtr(GHND, size1);
 339     if (fmt2 != NULL) {
 340       if (SUCCEEDED(AVIStreamReadFormat(avi2, start2, fmt2, &size1)))
 341         status = (memcmp(fmt1, fmt2, size1) == 0);
 342     }
 343   }
 344
 345   if (fmt2 != NULL)
 346     GlobalFreePtr(fmt2);
 347   GlobalFreePtr(fmt1);
 348
 349   return status;
 350 }
 351
 352 /***********************************************************************/
 353
 354 static HRESULT WINAPI IAVIEditStream_fnQueryInterface(IAVIEditStream*iface,REFIID refiid,LPVOID *obj)
 355 {
 356   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 357
 358   TRACE("(%p,%s,%p)\n", This, debugstr_guid(refiid), obj);
 359
 360   if (IsEqualGUID(&IID_IUnknown, refiid) ||
 361       IsEqualGUID(&IID_IAVIEditStream, refiid)) {
 362     *obj = iface;
 363     IAVIEditStream_AddRef(iface);
 364
 365     return S_OK;
 366   } else if (IsEqualGUID(&IID_IAVIStream, refiid)) {
 367     *obj = &This->iAVIStream;
 368     IAVIEditStream_AddRef(iface);
 369
 370     return S_OK;
 371   } else if (IsEqualGUID(&IID_IEditStreamInternal, refiid)) {
 372     *obj = &This->iEditStreamInternal;
 373     IAVIEditStream_AddRef(iface);
 374
 375     return S_OK;
 376   }
 377
 378   return OLE_E_ENUM_NOMORE;
 379 }
 380
 381 static ULONG   WINAPI IAVIEditStream_fnAddRef(IAVIEditStream*iface)
 382 {
 383   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 384   ULONG ref = InterlockedIncrement(&This->ref);
 385
 386   TRACE("(%p) -> %ld\n", iface, ref);
 387
 388   return ref;
 389 }
 390
 391 static ULONG   WINAPI IAVIEditStream_fnRelease(IAVIEditStream*iface)
 392 {
 393   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 394   DWORD i;
 395   ULONG ref = InterlockedDecrement(&This->ref);
 396
 397   TRACE("(%p) -> %ld\n", iface, ref);
 398
 399   if (!ref) {
 400     /* release memory */
 401     if (This->pg != NULL)
 402       AVIStreamGetFrameClose(This->pg);
 403     if (This->pStreams != NULL) {
 404       for (i = 0; i < This->nStreams; i++) {
 405         if (This->pStreams[i].pStream != NULL)
 406           IAVIStream_Release(This->pStreams[i].pStream);
 407       }
 408       GlobalFreePtr(This->pStreams);
 409     }
 410
 411     LocalFree((HLOCAL)This);
 412     return 0;
 413   }
 414   return ref;
 415 }
 416
 417 static HRESULT WINAPI IAVIEditStream_fnCut(IAVIEditStream*iface,LONG*plStart,
 418                                            LONG*plLength,PAVISTREAM*ppResult)
 419 {
 420   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 421   PAVISTREAM stream;
 422   DWORD      start, len, streamPos, streamNr;
 423   HRESULT    hr;
 424
 425   TRACE("(%p,%p,%p,%p)\n",iface,plStart,plLength,ppResult);
 426
 427   if (ppResult != NULL)
 428     *ppResult = NULL;
 429   if (plStart == NULL || plLength == NULL || *plStart < 0)
 430     return AVIERR_BADPARAM;
 431
 432   /* if asked for cutted part copy it before deleting */
 433   if (ppResult != NULL) {
 434     hr = IAVIEditStream_Copy(iface, plStart, plLength, ppResult);
 435     if (FAILED(hr))
 436       return hr;
 437   }
 438
 439   start = *plStart;
 440   len   = *plLength;
 441
 442   /* now delete the requested part */
 443   while (len > 0) {
 444     hr = AVIFILE_FindStreamInTable(This, start, &stream,
 445                                    &streamPos, &streamNr, FALSE);
 446     if (FAILED(hr))
 447       return hr;
 448     if (This->pStreams[streamNr].dwStart == streamPos) {
 449       /* deleting from start of part */
 450       if (len < This->pStreams[streamNr].dwLength) {
 451         start += len;
 452         This->pStreams[streamNr].dwStart  += len;
 453         This->pStreams[streamNr].dwLength -= len;
 454         This->sInfo.dwLength -= len;
 455         len = 0;
 456
 457         /* we must return decompressed data now */
 458         This->bDecompress = TRUE;
 459       } else {
 460         /* deleting hole part */
 461         len -= This->pStreams[streamNr].dwLength;
 462         AVIFILE_RemoveStream(This,streamNr);
 463       }
 464     } else if (EditStreamEnd(This, streamNr) <= streamPos + len) {
 465       /* deleting at end of a part */
 466       DWORD count = EditStreamEnd(This, streamNr) - streamPos;
 467       This->sInfo.dwLength -= count;
 468       len                  -= count;
 469       This->pStreams[streamNr].dwLength =
 470         streamPos - This->pStreams[streamNr].dwStart;
 471     } else {
 472       /* splitting */
 473       if (This->nStreams + 1 >= This->nTableSize) {
 474         This->pStreams =
 475           GlobalReAllocPtr(This->pStreams, (This->nTableSize + 32) * sizeof(EditStreamTable), GMEM_SHARE|GHND);
 476         if (This->pStreams == NULL)
 477           return AVIERR_MEMORY;
 478         This->nTableSize += 32;
 479       }
 480       memmove(This->pStreams + streamNr + 1, This->pStreams + streamNr,
 481               (This->nStreams - streamNr) * sizeof(EditStreamTable));
 482       This->nStreams++;
 483
 484       IAVIStream_AddRef(This->pStreams[streamNr + 1].pStream);
 485       This->pStreams[streamNr + 1].dwStart  = streamPos + len;
 486       This->pStreams[streamNr + 1].dwLength =
 487         EditStreamEnd(This, streamNr) - This->pStreams[streamNr + 1].dwStart;
 488
 489       This->pStreams[streamNr].dwLength =
 490         streamPos - This->pStreams[streamNr].dwStart;
 491       This->sInfo.dwLength -= len;
 492       len = 0;
 493     }
 494   }
 495
 496   This->sInfo.dwEditCount++;
 497
 498   return AVIERR_OK;
 499 }
 500
 501 static HRESULT WINAPI IAVIEditStream_fnCopy(IAVIEditStream*iface,LONG*plStart,
 502                                             LONG*plLength,PAVISTREAM*ppResult)
 503 {
 504   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 505   IAVIEditStreamImpl* pEdit;
 506   HRESULT hr;
 507   LONG start = 0;
 508
 509   TRACE("(%p,%p,%p,%p)\n",iface,plStart,plLength,ppResult);
 510
 511   if (ppResult == NULL)
 512     return AVIERR_BADPARAM;
 513   *ppResult = NULL;
 514   if (plStart == NULL || plLength == NULL || *plStart < 0 || *plLength < 0)
 515     return AVIERR_BADPARAM;
 516
 517   /* check bounds */
 518   if (*(LPDWORD)plLength > This->sInfo.dwLength)
 519     *(LPDWORD)plLength = This->sInfo.dwLength;
 520   if (*(LPDWORD)plStart < This->sInfo.dwStart) {
 521     *(LPDWORD)plLength -= This->sInfo.dwStart - *(LPDWORD)plStart;
 522     *(LPDWORD)plStart   = This->sInfo.dwStart;
 523     if (*plLength < 0)
 524       return AVIERR_BADPARAM;
 525   }
 526   if (*(LPDWORD)plStart + *(LPDWORD)plLength > This->sInfo.dwStart + This->sInfo.dwLength)
 527     *(LPDWORD)plLength = This->sInfo.dwStart + This->sInfo.dwLength -
 528       *(LPDWORD)plStart;
 529
 530   pEdit = (IAVIEditStreamImpl*)AVIFILE_CreateEditStream(NULL);
 531   if (pEdit == NULL)
 532     return AVIERR_MEMORY;
 533
 534   hr = IAVIEditStream_Paste((PAVIEDITSTREAM)pEdit,&start,plLength,
 535                             (PAVISTREAM)&This->iAVIStream,*plStart,
 536                             *plStart + *plLength);
 537   *plStart = start;
 538   if (FAILED(hr))
 539     IAVIEditStream_Release((PAVIEDITSTREAM)pEdit);
 540   else
 541     *ppResult = (PAVISTREAM)&pEdit->iAVIStream;
 542
 543   return hr;
 544 }
 545
 546 static HRESULT WINAPI IAVIEditStream_fnPaste(IAVIEditStream*iface,LONG*plStart,
 547                                              LONG*plLength,PAVISTREAM pSource,
 548                                              LONG lStart,LONG lLength)
 549 {
 550   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 551   AVISTREAMINFOW      srcInfo;
 552   IEditStreamInternal*pInternal = NULL;
 553   IAVIEditStreamImpl *pEdit = NULL;
 554   PAVISTREAM          pStream;
 555   DWORD               startPos, endPos, streamNr, nStreams;
 556   LONG                n;
 557
 558   TRACE("(%p,%p,%p,%p,%ld,%ld)\n",iface,plStart,plLength,
 559         pSource,lStart,lLength);
 560
 561   if (pSource == NULL)
 562     return AVIERR_BADHANDLE;
 563   if (plStart == NULL || *plStart < 0)
 564     return AVIERR_BADPARAM;
 565   if (This->sInfo.dwStart + This->sInfo.dwLength < *plStart)
 566     return AVIERR_BADPARAM; /* Can't paste with holes */
 567   if (FAILED(IAVIStream_Info(pSource, &srcInfo, sizeof(srcInfo))))
 568     return AVIERR_ERROR;
 569   if (lStart < srcInfo.dwStart || lStart >= srcInfo.dwStart + srcInfo.dwLength)
 570     return AVIERR_BADPARAM;
 571   if (This->sInfo.fccType == 0) {
 572     /* This stream is empty */
 573     IAVIStream_Info(pSource, &This->sInfo, sizeof(This->sInfo));
 574     This->sInfo.dwStart  = *plStart;
 575     This->sInfo.dwLength = 0;
 576   }
 577   if (This->sInfo.fccType != srcInfo.fccType)
 578     return AVIERR_UNSUPPORTED; /* different stream types */
 579   if (lLength == -1) /* Copy the hole stream */
 580     lLength = srcInfo.dwLength;
 581   if (lStart + lLength > srcInfo.dwStart + srcInfo.dwLength)
 582     lLength = srcInfo.dwStart + srcInfo.dwLength - lStart;
 583   if (lLength + *plStart >= 0x80000000)
 584     return AVIERR_MEMORY;
 585
 586   /* streamtype specific tests */
 587   if (srcInfo.fccType == streamtypeVIDEO) {
 588     LONG size;
 589
 590     size = srcInfo.rcFrame.right - srcInfo.rcFrame.left;
 591     if (size != This->sInfo.rcFrame.right - This->sInfo.rcFrame.left)
 592       return AVIERR_UNSUPPORTED; /* FIXME: Can't GetFrame convert it? */
 593     size = srcInfo.rcFrame.bottom - srcInfo.rcFrame.top;
 594     if (size != This->sInfo.rcFrame.bottom - This->sInfo.rcFrame.top)
 595       return AVIERR_UNSUPPORTED; /* FIXME: Can't GetFrame convert it? */
 596   } else if (srcInfo.fccType == streamtypeAUDIO) {
 597     if (! AVIFILE_FormatsEqual((PAVISTREAM)&This->iAVIStream, pSource))
 598       return AVIERR_UNSUPPORTED;
 599   } else {
 600     /* FIXME: streamtypeMIDI and streamtypeTEXT */
 601     return AVIERR_UNSUPPORTED;
 602   }
 603
 604   /* try to get an IEditStreamInternal interface */
 605   if (SUCCEEDED(IAVIStream_QueryInterface(pSource, &IID_IEditStreamInternal,
 606                                           (LPVOID*)&pInternal))) {
 607     pInternal->lpVtbl->GetEditStreamImpl(pInternal, (LPVOID*)&pEdit);
 608     pInternal->lpVtbl->Release(pInternal);
 609   }
 610
 611   /* for video must check for change of format */
 612   if (This->sInfo.fccType == streamtypeVIDEO) {
 613     if (! This->bDecompress) {
 614       /* Need to decompress if any of the following conditions matches:
 615        *  - pSource is an editable stream which decompresses
 616        *  - the nearest keyframe of pSource isn't lStart
 617        *  - the nearest keyframe of this stream isn't *plStart
 618        *  - the format of pSource doesn't match this one
 619        */
 620       if ((pEdit != NULL && pEdit->bDecompress) ||
 621           AVIStreamNearestKeyFrame(pSource, lStart) != lStart ||
 622           AVIStreamNearestKeyFrame((PAVISTREAM)&This->iAVIStream, *plStart) != *plStart ||
 623           (This->nStreams > 0 && !AVIFILE_FormatsEqual((PAVISTREAM)&This->iAVIStream, pSource))) {
 624         /* Use first stream part to get format to convert everything to */
 625         AVIFILE_ReadFrame(This, This->pStreams[0].pStream,
 626                           This->pStreams[0].dwStart);
 627
 628         /* Check if we could convert the source streams to the disired format... */
 629         if (pEdit != NULL) {
 630           if (FAILED(AVIFILE_FindStreamInTable(pEdit, lStart, &pStream,
 631                                                &startPos, &streamNr, TRUE)))
 632             return AVIERR_INTERNAL;
 633           for (n = lStart; n < lStart + lLength; streamNr++) {
 634             if (AVIFILE_ReadFrame(This, pEdit->pStreams[streamNr].pStream, startPos) == NULL)
 635               return AVIERR_BADFORMAT;
 636             startPos = pEdit->pStreams[streamNr].dwStart;
 637             n += pEdit->pStreams[streamNr].dwLength;
 638           }
 639         } else if (AVIFILE_ReadFrame(This, pSource, lStart) == NULL)
 640           return AVIERR_BADFORMAT;
 641
 642         This->bDecompress      = TRUE;
 643         This->sInfo.fccHandler = 0;
 644       }
 645     } else if (AVIFILE_ReadFrame(This, pSource, lStart) == NULL)
 646       return AVIERR_BADFORMAT; /* Can't convert source to own format */
 647   } /* FIXME: something special for the other formats? */
 648
 649   /* Make sure we have enough memory for parts */
 650   if (pEdit != NULL) {
 651     DWORD nLastStream;
 652
 653     AVIFILE_FindStreamInTable(pEdit, lStart + lLength, &pStream,
 654                               &endPos, &nLastStream, TRUE);
 655     AVIFILE_FindStreamInTable(pEdit, lStart, &pStream,
 656                               &startPos, &streamNr, FALSE);
 657     if (nLastStream == streamNr)
 658       nLastStream++;
 659
 660     nStreams = nLastStream - streamNr;
 661   } else
 662     nStreams = 1;
 663   if (This->nStreams + nStreams + 1 > This->nTableSize) {
 664     n = This->nStreams + nStreams + 33;
 665
 666     This->pStreams =
 667       GlobalReAllocPtr(This->pStreams, n * sizeof(EditStreamTable), GMEM_SHARE|GHND);
 668     if (This->pStreams == NULL)
 669       return AVIERR_MEMORY;
 670     This->nTableSize = n;
 671   }
 672
 673   if (plLength != NULL)
 674     *plLength = lLength;
 675
 676   /* now do the real work */
 677   if (This->sInfo.dwStart + This->sInfo.dwLength > *plStart) {
 678     AVIFILE_FindStreamInTable(This, *plStart, &pStream,
 679                               &startPos, &streamNr, FALSE);
 680     if (startPos != This->pStreams[streamNr].dwStart) {
 681       /* split stream streamNr at startPos */
 682       memmove(This->pStreams + streamNr + nStreams + 1,
 683               This->pStreams + streamNr,
 684               (This->nStreams + nStreams - streamNr + 1) * sizeof(EditStreamTable));
 685
 686       This->pStreams[streamNr + 2].dwLength =
 687         EditStreamEnd(This, streamNr + 2) - startPos;
 688       This->pStreams[streamNr + 2].dwStart = startPos;
 689       This->pStreams[streamNr].dwLength =
 690         startPos - This->pStreams[streamNr].dwStart;
 691       IAVIStream_AddRef(This->pStreams[streamNr].pStream);
 692       streamNr++;
 693     } else {
 694       /* insert before stream at streamNr */
 695       memmove(This->pStreams + streamNr + nStreams, This->pStreams + streamNr,
 696               (This->nStreams + nStreams - streamNr) * sizeof(EditStreamTable));
 697     }
 698   } else /* append the streams */
 699     streamNr = This->nStreams;
 700
 701   if (pEdit != NULL) {
 702     /* insert the parts of the editable stream instead of itself */
 703     AVIFILE_FindStreamInTable(pEdit, lStart + lLength, &pStream,
 704                               &endPos, NULL, FALSE);
 705     AVIFILE_FindStreamInTable(pEdit, lStart, &pStream, &startPos, &n, FALSE);
 706
 707     memcpy(This->pStreams + streamNr, pEdit->pStreams + n,
 708            nStreams * sizeof(EditStreamTable));
 709     if (This->pStreams[streamNr].dwStart < startPos) {
 710       This->pStreams[streamNr].dwLength =
 711         EditStreamEnd(This, streamNr) - startPos;
 712       This->pStreams[streamNr].dwStart  = startPos;
 713     }
 714     if (endPos < EditStreamEnd(This, streamNr + nStreams))
 715       This->pStreams[streamNr + nStreams].dwLength =
 716         endPos - This->pStreams[streamNr + nStreams].dwStart;
 717   } else {
 718     /* a simple stream */
 719     This->pStreams[streamNr].pStream  = pSource;
 720     This->pStreams[streamNr].dwStart  = lStart;
 721     This->pStreams[streamNr].dwLength = lLength;
 722   }
 723
 724   for (n = 0; n < nStreams; n++) {
 725     IAVIStream_AddRef(This->pStreams[streamNr + n].pStream);
 726     if (0 < streamNr + n &&
 727         This->pStreams[streamNr + n - 1].pStream != This->pStreams[streamNr + n].pStream) {
 728       This->sInfo.dwFlags |= AVISTREAMINFO_FORMATCHANGES;
 729       This->sInfo.dwFormatChangeCount++;
 730     }
 731   }
 732   This->sInfo.dwEditCount++;
 733   This->sInfo.dwLength += lLength;
 734   This->nStreams += nStreams;
 735
 736   return AVIERR_OK;
 737 }
 738
 739 static HRESULT WINAPI IAVIEditStream_fnClone(IAVIEditStream*iface,
 740                                              PAVISTREAM*ppResult)
 741 {
 742   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 743   IAVIEditStreamImpl* pEdit;
 744   DWORD i;
 745
 746   TRACE("(%p,%p)\n",iface,ppResult);
 747
 748   if (ppResult == NULL)
 749     return AVIERR_BADPARAM;
 750   *ppResult = NULL;
 751
 752   pEdit = (IAVIEditStreamImpl*)AVIFILE_CreateEditStream(NULL);
 753   if (pEdit == NULL)
 754     return AVIERR_MEMORY;
 755   if (This->nStreams > pEdit->nTableSize) {
 756     pEdit->pStreams = GlobalReAllocPtr(pEdit->pStreams, This->nStreams * sizeof(EditStreamTable),GMEM_SHARE|GHND);
 757     if (pEdit->pStreams == NULL)
 758       return AVIERR_MEMORY;
 759     pEdit->nTableSize = This->nStreams;
 760   }
 761   pEdit->nStreams = This->nStreams;
 762   memcpy(pEdit->pStreams, This->pStreams,
 763          This->nStreams * sizeof(EditStreamTable));
 764   memcpy(&pEdit->sInfo,&This->sInfo,sizeof(This->sInfo));
 765   for (i = 0; i < This->nStreams; i++) {
 766     if (pEdit->pStreams[i].pStream != NULL)
 767       IAVIStream_AddRef(pEdit->pStreams[i].pStream);
 768   }
 769
 770   *ppResult = (PAVISTREAM)&pEdit->iAVIStream;
 771
 772   return AVIERR_OK;
 773 }
 774
 775 static HRESULT WINAPI IAVIEditStream_fnSetInfo(IAVIEditStream*iface,
 776                                                LPAVISTREAMINFOW asi,LONG size)
 777 {
 778   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 779
 780   TRACE("(%p,%p,%ld)\n",iface,asi,size);
 781
 782   /* check parameters */
 783   if (asi == NULL)
 784     return AVIERR_BADPARAM;
 785   if (size != sizeof(AVISTREAMINFOW))
 786     return AVIERR_BADSIZE;
 787   if (asi->dwScale == 0 || asi->dwRate == 0 || (LONG)asi->dwQuality < -1 ||
 788       asi->dwQuality > ICQUALITY_HIGH)
 789     return AVIERR_ERROR;
 790
 791   This->sInfo.wLanguage = asi->wLanguage;
 792   This->sInfo.wPriority = asi->wPriority;
 793   This->sInfo.dwStart   = asi->dwStart;
 794   if (asi->dwRate != 0)
 795     This->sInfo.dwRate  = asi->dwRate;
 796   if (asi->dwScale != 0)
 797     This->sInfo.dwScale = asi->dwScale;
 798   if (asi->dwQuality <= ICQUALITY_HIGH)
 799     This->sInfo.dwQuality = ICQUALITY_HIGH;
 800   CopyRect(&This->sInfo.rcFrame, &asi->rcFrame);
 801   memcpy(&This->sInfo.szName, &asi->szName, sizeof(asi->szName));
 802   This->sInfo.dwEditCount++;
 803
 804   return AVIERR_OK;
 805 }
 806
 807 static HRESULT WINAPI IEditAVIStream_fnQueryInterface(IAVIStream*iface,
 808                                                       REFIID refiid,LPVOID*obj)
 809 {
 810   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
 811
 812   assert(This->pae != NULL);
 813
 814   return IAVIEditStream_QueryInterface((IAVIEditStream*)This->pae,refiid,obj);
 815 }
 816
 817 static ULONG   WINAPI IEditAVIStream_fnAddRef(IAVIStream*iface)
 818 {
 819   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
 820
 821   assert(This->pae != NULL);
 822
 823   return IAVIEditStream_AddRef((IAVIEditStream*)This->pae);
 824 }
 825
 826 static ULONG   WINAPI IEditAVIStream_fnRelease(IAVIStream*iface)
 827 {
 828   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
 829
 830   assert(This->pae != NULL);
 831
 832   return IAVIEditStream_Release((IAVIEditStream*)This->pae);
 833 }
 834
 835 static HRESULT WINAPI IEditAVIStream_fnCreate(IAVIStream*iface,
 836                                               LPARAM lParam1,LPARAM lParam2)
 837 {
 838   IAVIEditStreamImpl *This = ((IEditAVIStreamImpl*)iface)->pae;
 839
 840   if (lParam2 != 0)
 841     return AVIERR_ERROR;
 842
 843   if (This->pStreams == NULL) {
 844     This->pStreams =
 845       GlobalAllocPtr(GMEM_SHARE|GHND, 256 * sizeof(EditStreamTable));
 846     if (This->pStreams == NULL)
 847       return AVIERR_MEMORY;
 848     This->nTableSize = 256;
 849   }
 850
 851   if (lParam1 != 0) {
 852     IAVIStream_Info((PAVISTREAM)lParam1, &This->sInfo, sizeof(This->sInfo));
 853     IAVIStream_AddRef((PAVISTREAM)lParam1);
 854     This->pStreams[0].pStream  = (PAVISTREAM)lParam1;
 855     This->pStreams[0].dwStart  = This->sInfo.dwStart;
 856     This->pStreams[0].dwLength = This->sInfo.dwLength;
 857     This->nStreams = 1;
 858   }
 859   return AVIERR_OK;
 860 }
 861
 862 static HRESULT WINAPI IEditAVIStream_fnInfo(IAVIStream*iface,
 863                                             AVISTREAMINFOW *psi,LONG size)
 864 {
 865   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
 866
 867   TRACE("(%p,%p,%ld)\n",iface,psi,size);
 868
 869   assert(This->pae != NULL);
 870
 871   if (psi == NULL)
 872     return AVIERR_BADPARAM;
 873   if (size < 0)
 874     return AVIERR_BADSIZE;
 875
 876   if (This->pae->bDecompress)
 877     This->pae->sInfo.fccHandler = 0;
 878
 879   memcpy(psi, &This->pae->sInfo, min((DWORD)size, sizeof(This->pae->sInfo)));
 880
 881   if ((DWORD)size < sizeof(This->pae->sInfo))
 882     return AVIERR_BUFFERTOOSMALL;
 883   return AVIERR_OK;
 884 }
 885
 886 static LONG    WINAPI IEditAVIStream_fnFindSample(IAVIStream*iface,LONG pos,
 887                                                   LONG flags)
 888 {
 889   IAVIEditStreamImpl* const This = ((IEditAVIStreamImpl* const)iface)->pae;
 890   PAVISTREAM stream;
 891   DWORD      streamPos, streamNr;
 892
 893   TRACE("(%p,%ld,0x%08lX)\n",iface,pos,flags);
 894
 895   if (flags & FIND_FROM_START)
 896     pos = (LONG)This->sInfo.dwStart;
 897
 898   /* outside of stream? */
 899   if (pos < (LONG)This->sInfo.dwStart ||
 900       (LONG)This->sInfo.dwStart + (LONG)This->sInfo.dwLength <= pos)
 901     return -1;
 902
 903   /* map our position to a stream and position in it */
 904   if (AVIFILE_FindStreamInTable(This, pos, &stream, &streamPos,
 905                                 &streamNr, TRUE))
 906     return -1; /* doesn't exist */
 907
 908   if (This->bDecompress) {
 909     /* only one stream -- format changes only at start */
 910     if (flags & FIND_FORMAT)
 911       return (flags & FIND_NEXT ? -1 : 0);
 912
 913     /* FIXME: map positions back to us */
 914     return IAVIStream_FindSample(stream, streamPos, flags);
 915   } else {
 916     /* assume change of format every frame */
 917     return pos;
 918   }
 919 }
 920
 921 static HRESULT WINAPI IEditAVIStream_fnReadFormat(IAVIStream*iface,LONG pos,
 922                                                   LPVOID format,LONG*fmtsize)
 923 {
 924   IAVIEditStreamImpl* const This = ((IEditAVIStreamImpl* const)iface)->pae;
 925   LPBITMAPINFOHEADER  lp;
 926   PAVISTREAM          stream;
 927   DWORD               n;
 928   HRESULT             hr;
 929
 930   TRACE("(%p,%ld,%p,%p)\n",iface,pos,format,fmtsize);
 931
 932   if (fmtsize == NULL || pos < This->sInfo.dwStart ||
 933       This->sInfo.dwStart + This->sInfo.dwLength <= pos)
 934     return AVIERR_BADPARAM;
 935
 936   /* find stream corresponding to position */
 937   hr = AVIFILE_FindStreamInTable(This, pos, &stream, &n, NULL, FALSE);
 938   if (FAILED(hr))
 939     return hr;
 940
 941   if (! This->bDecompress)
 942     return IAVIStream_ReadFormat(stream, n, format, fmtsize);
 943
 944   lp = (LPBITMAPINFOHEADER)AVIFILE_ReadFrame(This, stream, n);
 945   if (lp == NULL)
 946     return AVIERR_ERROR;
 947   if (lp->biBitCount <= 8) {
 948     n  = (lp->biClrUsed > 0 ? lp->biClrUsed : 1 << lp->biBitCount);
 949     n *= sizeof(RGBQUAD);
 950   } else
 951     n = 0;
 952   n += lp->biSize;
 953
 954   memcpy(format, lp, min((LONG)n, *fmtsize));
 955   hr = ((LONG)n > *fmtsize ? AVIERR_BUFFERTOOSMALL : AVIERR_OK);
 956   *fmtsize = n;
 957
 958   return hr;
 959 }
 960
 961 static HRESULT WINAPI IEditAVIStream_fnSetFormat(IAVIStream*iface,LONG pos,
 962                                                  LPVOID format,LONG formatsize)
 963 {
 964   TRACE("(%p,%ld,%p,%ld)\n",iface,pos,format,formatsize);
 965
 966   return AVIERR_UNSUPPORTED;
 967 }
 968
 969 static HRESULT WINAPI IEditAVIStream_fnRead(IAVIStream*iface,LONG start,
 970                                             LONG samples,LPVOID buffer,
 971                                             LONG buffersize,LONG*bytesread,
 972                                             LONG*samplesread)
 973 {
 974   IAVIEditStreamImpl* const This = ((IEditAVIStreamImpl* const)iface)->pae;
 975   PAVISTREAM stream;
 976   DWORD   streamPos, streamNr;
 977   LONG    readBytes, readSamples, count;
 978   HRESULT hr;
 979
 980   TRACE("(%p,%ld,%ld,%p,%ld,%p,%p) -- 0x%08lX\n",iface,start,samples,
 981         buffer,buffersize,bytesread,samplesread,This->sInfo.fccType);
 982
 983   /* check parameters */
 984   if (bytesread != NULL)
 985     *bytesread = 0;
 986   if (samplesread != NULL)
 987     *samplesread = 0;
 988   if (buffersize < 0)
 989     return AVIERR_BADSIZE;
 990   if ((DWORD)start < This->sInfo.dwStart ||
 991       This->sInfo.dwStart + This->sInfo.dwLength < (DWORD)start)
 992     return AVIERR_BADPARAM;
 993
 994   if (! This->bDecompress) {
 995     /* audio like data -- sample-based */
 996     do {
 997       if (samples == 0)
 998         return AVIERR_OK; /* nothing at all or already done */
 999
1000       if (FAILED(AVIFILE_FindStreamInTable(This, start, &stream,
1001                                            &streamPos, &streamNr, FALSE)))
1002         return AVIERR_ERROR;
1003
1004       /* limit to end of the stream */
1005       count = samples;
1006       if (streamPos + count > EditStreamEnd(This, streamNr))
1007         count = EditStreamEnd(This, streamNr) - streamPos;
1008
1009       hr = IAVIStream_Read(stream, streamPos, count, buffer, buffersize,
1010                            &readBytes, &readSamples);
1011       if (FAILED(hr))
1012         return hr;
1013       if (readBytes == 0 && readSamples == 0 && count != 0)
1014         return AVIERR_FILEREAD; /* for bad stream implementations */
1015
1016       if (samplesread != NULL)
1017         *samplesread += readSamples;
1018       if (bytesread != NULL)
1019         *bytesread += readBytes;
1020       if (buffer != NULL) {
1021         buffer = ((LPBYTE)buffer)+readBytes;
1022         buffersize     -= readBytes;
1023       }
1024       start   += count;
1025       samples -= count;
1026     } while (This->sInfo.dwStart + This->sInfo.dwLength > start);
1027   } else {
1028     /* video like data -- frame-based */
1029     LPBITMAPINFOHEADER lp;
1030
1031     if (samples == 0)
1032       return AVIERR_OK;
1033
1034     if (FAILED(AVIFILE_FindStreamInTable(This, start, &stream,
1035                                          &streamPos, &streamNr, FALSE)))
1036       return AVIERR_ERROR;
1037
1038     lp = AVIFILE_ReadFrame(This, stream, streamPos);
1039     if (lp == NULL)
1040       return AVIERR_ERROR;
1041
1042     if (buffer != NULL) {
1043       /* need size of format to skip */
1044       if (lp->biBitCount <= 8) {
1045         count  = lp->biClrUsed > 0 ? lp->biClrUsed : 1 << lp->biBitCount;
1046         count *= sizeof(RGBQUAD);
1047       } else
1048         count = 0;
1049       count += lp->biSize;
1050
1051       if (buffersize < lp->biSizeImage)
1052         return AVIERR_BUFFERTOOSMALL;
1053       memcpy(buffer, (LPBYTE)lp + count, lp->biSizeImage);
1054     }
1055
1056     if (bytesread != NULL)
1057       *bytesread = lp->biSizeImage;
1058     if (samplesread != NULL)
1059       *samplesread = 1;
1060   }
1061
1062   return AVIERR_OK;
1063 }
1064
1065 static HRESULT WINAPI IEditAVIStream_fnWrite(IAVIStream*iface,LONG start,
1066                                              LONG samples,LPVOID buffer,
1067                                              LONG buffersize,DWORD flags,
1068                                              LONG*sampwritten,LONG*byteswritten)
1069 {
1070   TRACE("(%p,%ld,%ld,%p,%ld,0x%08lX,%p,%p)\n",iface,start,samples,buffer,
1071         buffersize,flags,sampwritten,byteswritten);
1072
1073   /* be sure return parameters have correct values */
1074   if (sampwritten != NULL)
1075     *sampwritten = 0;
1076   if (byteswritten != NULL)
1077     *byteswritten = 0;
1078
1079   return AVIERR_UNSUPPORTED;
1080 }
1081
1082 static HRESULT WINAPI IEditAVIStream_fnDelete(IAVIStream*iface,LONG start,
1083                                               LONG samples)
1084 {
1085   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
1086
1087   TRACE("(%p,%ld,%ld)\n",iface,start,samples);
1088
1089   return IAVIEditStream_Cut((IAVIEditStream*)This->pae,&start,&samples,NULL);
1090 }
1091
1092 static HRESULT WINAPI IEditAVIStream_fnReadData(IAVIStream*iface,DWORD fcc,
1093                                                 LPVOID lp,LONG *lpread)
1094 {
1095   IAVIEditStreamImpl* const This = ((IEditAVIStreamImpl* const)iface)->pae;
1096   DWORD n;
1097
1098   TRACE("(%p,0x%08lX,%p,%p)\n",iface,fcc,lp,lpread);
1099
1100   /* check parameters */
1101   if (lp == NULL || lpread == NULL)
1102     return AVIERR_BADPARAM;
1103
1104   /* simply ask every stream and return the first block found */
1105   for (n = 0; n < This->nStreams; n++) {
1106     HRESULT hr = IAVIStream_ReadData(This->pStreams[n].pStream,fcc,lp,lpread);
1107
1108     if (SUCCEEDED(hr))
1109       return hr;
1110   }
1111
1112   *lpread = 0;
1113   return AVIERR_NODATA;
1114 }
1115
1116 static HRESULT WINAPI IEditAVIStream_fnWriteData(IAVIStream*iface,DWORD fcc,
1117                                                  LPVOID lp,LONG size)
1118 {
1119   TRACE("(%p,0x%08lX,%p,%ld)\n",iface,fcc,lp,size);
1120
1121   return AVIERR_UNSUPPORTED;
1122 }
1123
1124 static HRESULT WINAPI IEditAVIStream_fnSetInfo(IAVIStream*iface,
1125                                                AVISTREAMINFOW*info,LONG len)
1126 {
1127   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
1128
1129   TRACE("(%p,%p,%ld)\n",iface,info,len);
1130
1131   return IAVIEditStream_SetInfo((IAVIEditStream*)This->pae,info,len);
1132 }
1133
1134 static HRESULT WINAPI IEditStreamInternal_fnQueryInterface(IEditStreamInternal*iface,REFIID refiid,LPVOID*obj)
1135 {
1136   IEditStreamInternalImpl *This = (IEditStreamInternalImpl *)iface;
1137
1138   assert(This->pae != NULL);
1139
1140   return IAVIEditStream_QueryInterface((IAVIEditStream*)This->pae, refiid, obj);
1141 }
1142
1143 static ULONG   WINAPI IEditStreamInternal_fnAddRef(IEditStreamInternal*iface)
1144 {
1145   IEditStreamInternalImpl *This = (IEditStreamInternalImpl *)iface;
1146
1147   assert(This->pae != NULL);
1148
1149   return IAVIEditStream_AddRef((IAVIEditStream*)This->pae);
1150 }
1151
1152 static ULONG   WINAPI IEditStreamInternal_fnRelease(IEditStreamInternal*iface)
1153 {
1154   IEditStreamInternalImpl *This = (IEditStreamInternalImpl *)iface;
1155
1156   assert(This->pae != NULL);
1157
1158   return IAVIEditStream_Release((IAVIEditStream*)This->pae);
1159 }
1160
1161 static HRESULT  WINAPI IEditStreamInternal_fnGetEditStreamImpl(IEditStreamInternal*iface,LPVOID*ppimpl)
1162 {
1163   IEditStreamInternalImpl *This = (IEditStreamInternalImpl *)iface;
1164
1165   TRACE("(%p,%p) -> %p\n", iface, ppimpl, This->pae);
1166
1167   assert(This->pae != NULL);
1168   assert(ppimpl != NULL);
1169
1170   *ppimpl = This->pae;
1171   return AVIERR_OK;
1172 }