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
  44 typedef struct _EditStreamTable {
  45   PAVISTREAM pStream;  /* stream which contains the data */
  46   DWORD      dwStart;  /* where starts the part which is also our */
  47   DWORD      dwLength; /* how many is also in this stream */
  48 } EditStreamTable;
  49
  50 #define INTERFACE IEditStreamInternal
  51 DECLARE_INTERFACE_(IEditStreamInternal,IUnknown)
  52 {
  53     /*** IUnknown methods ***/
  54     STDMETHOD_(HRESULT,QueryInterface)(THIS_ REFIID riid, void** ppvObject) PURE;
  55     STDMETHOD_(ULONG,AddRef)(THIS) PURE;
  56     STDMETHOD_(ULONG,Release)(THIS) PURE;
  57     /*** IEditStreamInternal methods ***/
  58     STDMETHOD(GetEditStreamImpl)(THIS_ LPVOID*) PURE;
  59 };
  60 #undef INTERFACE
  61
  62 #define EditStreamEnd(This,streamNr) ((This)->pStreams[streamNr].dwStart + \
  63                                       (This)->pStreams[streamNr].dwLength)
  64
  65 /***********************************************************************/
  66
  67 static HRESULT WINAPI IAVIEditStream_fnQueryInterface(IAVIEditStream*iface,REFIID refiid,LPVOID *obj);
  68 static ULONG   WINAPI IAVIEditStream_fnAddRef(IAVIEditStream*iface);
  69 static ULONG   WINAPI IAVIEditStream_fnRelease(IAVIEditStream*iface);
  70 static HRESULT WINAPI IAVIEditStream_fnCut(IAVIEditStream*iface,LONG*plStart,
  71                                            LONG*plLength,PAVISTREAM*ppResult);
  72 static HRESULT WINAPI IAVIEditStream_fnCopy(IAVIEditStream*iface,LONG*plStart,
  73                                             LONG*plLength,PAVISTREAM*ppResult);
  74 static HRESULT WINAPI IAVIEditStream_fnPaste(IAVIEditStream*iface,LONG*plStart,
  75                                              LONG*plLength,PAVISTREAM pSource,
  76                                              LONG lStart,LONG lEnd);
  77 static HRESULT WINAPI IAVIEditStream_fnClone(IAVIEditStream*iface,
  78                                              PAVISTREAM*ppResult);
  79 static HRESULT WINAPI IAVIEditStream_fnSetInfo(IAVIEditStream*iface,
  80                                                LPAVISTREAMINFOW asi,LONG size);
  81
  82 static const struct IAVIEditStreamVtbl ieditstream = {
  83   IAVIEditStream_fnQueryInterface,
  84   IAVIEditStream_fnAddRef,
  85   IAVIEditStream_fnRelease,
  86   IAVIEditStream_fnCut,
  87   IAVIEditStream_fnCopy,
  88   IAVIEditStream_fnPaste,
  89   IAVIEditStream_fnClone,
  90   IAVIEditStream_fnSetInfo
  91 };
  92
  93 static HRESULT WINAPI IEditAVIStream_fnQueryInterface(IAVIStream*iface,REFIID refiid,LPVOID*obj);
  94 static ULONG   WINAPI IEditAVIStream_fnAddRef(IAVIStream*iface);
  95 static ULONG   WINAPI IEditAVIStream_fnRelease(IAVIStream*iface);
  96 static HRESULT WINAPI IEditAVIStream_fnCreate(IAVIStream*iface,LPARAM lParam1,LPARAM lParam2);
  97 static HRESULT WINAPI IEditAVIStream_fnInfo(IAVIStream*iface,AVISTREAMINFOW *psi,LONG size);
  98 static LONG    WINAPI IEditAVIStream_fnFindSample(IAVIStream*iface,LONG pos,
  99                                                   LONG flags);
 100 static HRESULT WINAPI IEditAVIStream_fnReadFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG*formatsize);
 101 static HRESULT WINAPI IEditAVIStream_fnSetFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG formatsize);
 102 static HRESULT WINAPI IEditAVIStream_fnRead(IAVIStream*iface,LONG start,
 103                                             LONG samples,LPVOID buffer,
 104                                             LONG buffersize,LONG*bytesread,
 105                                             LONG*samplesread);
 106 static HRESULT WINAPI IEditAVIStream_fnWrite(IAVIStream*iface,LONG start,
 107                                              LONG samples,LPVOID buffer,
 108                                              LONG buffersize,DWORD flags,
 109                                              LONG*sampwritten,LONG*byteswritten);
 110 static HRESULT WINAPI IEditAVIStream_fnDelete(IAVIStream*iface,LONG start,LONG samples);
 111 static HRESULT WINAPI IEditAVIStream_fnReadData(IAVIStream*iface,DWORD fcc,
 112                                                 LPVOID lp,LONG *lpread);
 113 static HRESULT WINAPI IEditAVIStream_fnWriteData(IAVIStream*iface,DWORD fcc,
 114                                                  LPVOID lp,LONG size);
 115 static HRESULT WINAPI IEditAVIStream_fnSetInfo(IAVIStream*iface,AVISTREAMINFOW*info,LONG infolen);
 116
 117 static const struct IAVIStreamVtbl ieditstast = {
 118   IEditAVIStream_fnQueryInterface,
 119   IEditAVIStream_fnAddRef,
 120   IEditAVIStream_fnRelease,
 121   IEditAVIStream_fnCreate,
 122   IEditAVIStream_fnInfo,
 123   IEditAVIStream_fnFindSample,
 124   IEditAVIStream_fnReadFormat,
 125   IEditAVIStream_fnSetFormat,
 126   IEditAVIStream_fnRead,
 127   IEditAVIStream_fnWrite,
 128   IEditAVIStream_fnDelete,
 129   IEditAVIStream_fnReadData,
 130   IEditAVIStream_fnWriteData,
 131   IEditAVIStream_fnSetInfo
 132 };
 133
 134 static HRESULT WINAPI IEditStreamInternal_fnQueryInterface(IEditStreamInternal*iface,REFIID refiid,LPVOID*obj);
 135 static ULONG   WINAPI IEditStreamInternal_fnAddRef(IEditStreamInternal*iface);
 136 static ULONG   WINAPI IEditStreamInternal_fnRelease(IEditStreamInternal*iface);
 137 static HRESULT WINAPI IEditStreamInternal_fnGetEditStreamImpl(IEditStreamInternal*iface,LPVOID*ppimpl);
 138
 139 static const struct IEditStreamInternalVtbl ieditstreaminternal = {
 140   IEditStreamInternal_fnQueryInterface,
 141   IEditStreamInternal_fnAddRef,
 142   IEditStreamInternal_fnRelease,
 143   IEditStreamInternal_fnGetEditStreamImpl
 144 };
 145
 146 typedef struct _IAVIEditStreamImpl IAVIEditStreamImpl;
 147
 148 typedef struct _IEditAVIStreamImpl {
 149   /* IUnknown stuff */
 150   const IAVIStreamVtbl *lpVtbl;
 151
 152   /* IAVIStream stuff */
 153   IAVIEditStreamImpl *pae;
 154 } IEditAVIStreamImpl;
 155
 156 typedef struct _IEditStreamInternalImpl {
 157   /* IUnknown stuff */
 158   const IEditStreamInternalVtbl *lpVtbl;
 159
 160   /* IEditStreamInternal stuff */
 161   IAVIEditStreamImpl *pae;
 162 } IEditStreamInternalImpl;
 163
 164 struct _IAVIEditStreamImpl {
 165   /* IUnknown stuff */
 166   const IAVIEditStreamVtbl *lpVtbl;
 167   LONG  ref;
 168
 169   /* IAVIEditStream stuff */
 170   IEditAVIStreamImpl      iAVIStream;
 171   IEditStreamInternalImpl iEditStreamInternal;
 172
 173   AVISTREAMINFOW       sInfo;
 174
 175   EditStreamTable     *pStreams;
 176   DWORD                nStreams;   /* current fill level of pStreams table */
 177   DWORD                nTableSize; /* size of pStreams table */
 178
 179   BOOL                 bDecompress;
 180   PAVISTREAM           pCurStream;
 181   PGETFRAME            pg;         /* IGetFrame for pCurStream */
 182   LPBITMAPINFOHEADER   lpFrame;    /* frame of pCurStream */
 183 };
 184
 185 /***********************************************************************/
 186
 187 PAVIEDITSTREAM AVIFILE_CreateEditStream(PAVISTREAM pstream)
 188 {
 189   IAVIEditStreamImpl *pedit = NULL;
 190
 191   pedit = (IAVIEditStreamImpl*)LocalAlloc(LPTR,sizeof(IAVIEditStreamImpl));
 192   if (pedit == NULL)
 193     return NULL;
 194
 195   pedit->lpVtbl            = &ieditstream;
 196   pedit->iAVIStream.lpVtbl = &ieditstast;
 197   pedit->iAVIStream.pae    = pedit;
 198   pedit->iEditStreamInternal.lpVtbl = &ieditstreaminternal;
 199   pedit->iEditStreamInternal.pae    = pedit;
 200   pedit->ref = 1;
 201
 202   IAVIStream_Create((PAVISTREAM)&pedit->iAVIStream,(LPARAM)pstream,0);
 203
 204   return (PAVIEDITSTREAM)pedit;
 205 }
 206
 207 static HRESULT AVIFILE_FindStreamInTable(IAVIEditStreamImpl* const This,
 208                                          DWORD pos,PAVISTREAM *ppStream,
 209                                          DWORD* streamPos,
 210                                          DWORD* streamNr,BOOL bFindSample)
 211 {
 212   DWORD n;
 213
 214   TRACE("(%p,%lu,%p,%p,%p,%d)\n",This,pos,ppStream,streamPos,
 215         streamNr,bFindSample);
 216
 217   if (pos < This->sInfo.dwStart)
 218     return AVIERR_BADPARAM;
 219
 220   pos -= This->sInfo.dwStart;
 221   for (n = 0; n < This->nStreams; n++) {
 222     if (pos < This->pStreams[n].dwLength) {
 223       *ppStream  = This->pStreams[n].pStream;
 224       *streamPos = This->pStreams[n].dwStart + pos;
 225       if (streamNr != NULL)
 226         *streamNr = n;
 227
 228       return AVIERR_OK;
 229     }
 230     pos -= This->pStreams[n].dwLength;
 231   }
 232   if (pos == 0 && bFindSample) {
 233     *ppStream  = This->pStreams[--n].pStream;
 234     *streamPos = EditStreamEnd(This, n);
 235     if (streamNr != NULL)
 236       *streamNr = n;
 237
 238     TRACE(" -- pos=0 && b=1 -> (%p,%lu,%lu)\n",*ppStream, *streamPos, n);
 239     return AVIERR_OK;
 240   } else {
 241     *ppStream = NULL;
 242     *streamPos = 0;
 243     if (streamNr != NULL)
 244       *streamNr = 0;
 245
 246     TRACE(" -> ERROR (NULL,0,0)\n");
 247     return AVIERR_BADPARAM;
 248   }
 249 }
 250
 251 static LPVOID AVIFILE_ReadFrame(IAVIEditStreamImpl* const This,
 252                                 PAVISTREAM pstream, LONG pos)
 253 {
 254   PGETFRAME pg;
 255
 256   TRACE("(%p,%p,%ld)\n",This,pstream,pos);
 257
 258   if (pstream == NULL)
 259     return NULL;
 260
 261   /* if stream changes make sure that only palette changes */
 262   if (This->pCurStream != pstream) {
 263     pg = AVIStreamGetFrameOpen(pstream, NULL);
 264     if (pg == NULL)
 265       return NULL;
 266     if (This->pg != NULL) {
 267       if (IGetFrame_SetFormat(pg, This->lpFrame, NULL, 0, 0, -1, -1)) {
 268         AVIStreamGetFrameClose(pg);
 269         ERR(": IGetFrame_SetFormat failed\n");
 270         return NULL;
 271       }
 272       AVIStreamGetFrameClose(This->pg);
 273     }
 274     This->pg         = pg;
 275     This->pCurStream = pstream;
 276   }
 277
 278   /* now get the decompressed frame */
 279   This->lpFrame = AVIStreamGetFrame(This->pg, pos);
 280   if (This->lpFrame != NULL)
 281     This->sInfo.dwSuggestedBufferSize = This->lpFrame->biSizeImage;
 282
 283   return This->lpFrame;
 284 }
 285
 286 static HRESULT AVIFILE_RemoveStream(IAVIEditStreamImpl* const This, DWORD nr)
 287 {
 288   assert(This != NULL);
 289   assert(nr < This->nStreams);
 290
 291   /* remove part nr */
 292   IAVIStream_Release(This->pStreams[nr].pStream);
 293   This->nStreams--;
 294   if (This->nStreams - nr > 0) {
 295     memmove(This->pStreams + nr, This->pStreams + nr + 1,
 296             (This->nStreams - nr) * sizeof(EditStreamTable));
 297   }
 298   This->pStreams[This->nStreams].pStream  = NULL;
 299   This->pStreams[This->nStreams].dwStart  = 0;
 300   This->pStreams[This->nStreams].dwLength = 0;
 301
 302   /* try to merge the part before the deleted one and the one after it */
 303   if (0 < nr && 0 < This->nStreams &&
 304       This->pStreams[nr - 1].pStream == This->pStreams[nr].pStream) {
 305     if (EditStreamEnd(This, nr - 1) == This->pStreams[nr].dwStart) {
 306       This->pStreams[nr - 1].dwLength += This->pStreams[nr].dwLength;
 307       return AVIFILE_RemoveStream(This, nr);
 308     }
 309   }
 310
 311   return AVIERR_OK;
 312 }
 313
 314 static BOOL AVIFILE_FormatsEqual(PAVISTREAM avi1, PAVISTREAM avi2)
 315 {
 316   LPVOID fmt1 = NULL, fmt2 = NULL;
 317   LONG size1, size2, start1, start2;
 318   BOOL status = FALSE;
 319
 320   assert(avi1 != NULL && avi2 != NULL);
 321
 322   /* get stream starts and check format sizes */
 323   start1 = AVIStreamStart(avi1);
 324   start2 = AVIStreamStart(avi2);
 325   if (FAILED(AVIStreamFormatSize(avi1, start1, &size1)))
 326     return FALSE;
 327   if (FAILED(AVIStreamFormatSize(avi2, start2, &size2)))
 328     return FALSE;
 329   if (size1 != size2)
 330     return FALSE;
 331
 332   /* sizes match, now get formats and compare them */
 333   fmt1 = GlobalAllocPtr(GHND, size1);
 334   if (fmt1 == NULL)
 335     return FALSE;
 336   if (SUCCEEDED(AVIStreamReadFormat(avi1, start1, fmt1, &size1))) {
 337     fmt2 = GlobalAllocPtr(GHND, size1);
 338     if (fmt2 != NULL) {
 339       if (SUCCEEDED(AVIStreamReadFormat(avi2, start2, fmt2, &size1)))
 340         status = (memcmp(fmt1, fmt2, size1) == 0);
 341     }
 342   }
 343
 344   if (fmt2 != NULL)
 345     GlobalFreePtr(fmt2);
 346   GlobalFreePtr(fmt1);
 347
 348   return status;
 349 }
 350
 351 /***********************************************************************/
 352
 353 static HRESULT WINAPI IAVIEditStream_fnQueryInterface(IAVIEditStream*iface,REFIID refiid,LPVOID *obj)
 354 {
 355   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 356
 357   TRACE("(%p,%s,%p)\n", This, debugstr_guid(refiid), obj);
 358
 359   if (IsEqualGUID(&IID_IUnknown, refiid) ||
 360       IsEqualGUID(&IID_IAVIEditStream, refiid)) {
 361     *obj = iface;
 362     IAVIEditStream_AddRef(iface);
 363
 364     return S_OK;
 365   } else if (IsEqualGUID(&IID_IAVIStream, refiid)) {
 366     *obj = &This->iAVIStream;
 367     IAVIEditStream_AddRef(iface);
 368
 369     return S_OK;
 370   } else if (IsEqualGUID(&IID_IEditStreamInternal, refiid)) {
 371     *obj = &This->iEditStreamInternal;
 372     IAVIEditStream_AddRef(iface);
 373
 374     return S_OK;
 375   }
 376
 377   return OLE_E_ENUM_NOMORE;
 378 }
 379
 380 static ULONG   WINAPI IAVIEditStream_fnAddRef(IAVIEditStream*iface)
 381 {
 382   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 383   ULONG ref = InterlockedIncrement(&This->ref);
 384
 385   TRACE("(%p) -> %ld\n", iface, ref);
 386
 387   return ref;
 388 }
 389
 390 static ULONG   WINAPI IAVIEditStream_fnRelease(IAVIEditStream*iface)
 391 {
 392   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 393   DWORD i;
 394   ULONG ref = InterlockedDecrement(&This->ref);
 395
 396   TRACE("(%p) -> %ld\n", iface, ref);
 397
 398   if (!ref) {
 399     /* release memory */
 400     if (This->pg != NULL)
 401       AVIStreamGetFrameClose(This->pg);
 402     if (This->pStreams != NULL) {
 403       for (i = 0; i < This->nStreams; i++) {
 404         if (This->pStreams[i].pStream != NULL)
 405           IAVIStream_Release(This->pStreams[i].pStream);
 406       }
 407       GlobalFreePtr(This->pStreams);
 408     }
 409
 410     LocalFree((HLOCAL)This);
 411     return 0;
 412   }
 413   return ref;
 414 }
 415
 416 static HRESULT WINAPI IAVIEditStream_fnCut(IAVIEditStream*iface,LONG*plStart,
 417                                            LONG*plLength,PAVISTREAM*ppResult)
 418 {
 419   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 420   PAVISTREAM stream;
 421   DWORD      start, len, streamPos, streamNr;
 422   HRESULT    hr;
 423
 424   TRACE("(%p,%p,%p,%p)\n",iface,plStart,plLength,ppResult);
 425
 426   if (ppResult != NULL)
 427     *ppResult = NULL;
 428   if (plStart == NULL || plLength == NULL || *plStart < 0)
 429     return AVIERR_BADPARAM;
 430
 431   /* if asked for cutted part copy it before deleting */
 432   if (ppResult != NULL) {
 433     hr = IAVIEditStream_Copy(iface, plStart, plLength, ppResult);
 434     if (FAILED(hr))
 435       return hr;
 436   }
 437
 438   start = *plStart;
 439   len   = *plLength;
 440
 441   /* now delete the requested part */
 442   while (len > 0) {
 443     hr = AVIFILE_FindStreamInTable(This, start, &stream,
 444                                    &streamPos, &streamNr, FALSE);
 445     if (FAILED(hr))
 446       return hr;
 447     if (This->pStreams[streamNr].dwStart == streamPos) {
 448       /* deleting from start of part */
 449       if (len < This->pStreams[streamNr].dwLength) {
 450         start += len;
 451         This->pStreams[streamNr].dwStart  += len;
 452         This->pStreams[streamNr].dwLength -= len;
 453         This->sInfo.dwLength -= len;
 454         len = 0;
 455
 456         /* we must return decompressed data now */
 457         This->bDecompress = TRUE;
 458       } else {
 459         /* deleting hole part */
 460         len -= This->pStreams[streamNr].dwLength;
 461         AVIFILE_RemoveStream(This,streamNr);
 462       }
 463     } else if (EditStreamEnd(This, streamNr) <= streamPos + len) {
 464       /* deleting at end of a part */
 465       DWORD count = EditStreamEnd(This, streamNr) - streamPos;
 466       This->sInfo.dwLength -= count;
 467       len                  -= count;
 468       This->pStreams[streamNr].dwLength =
 469         streamPos - This->pStreams[streamNr].dwStart;
 470     } else {
 471       /* splitting */
 472       if (This->nStreams + 1 >= This->nTableSize) {
 473         This->pStreams =
 474           GlobalReAllocPtr(This->pStreams, (This->nTableSize + 32) * sizeof(EditStreamTable), GMEM_SHARE|GHND);
 475         if (This->pStreams == NULL)
 476           return AVIERR_MEMORY;
 477         This->nTableSize += 32;
 478       }
 479       memmove(This->pStreams + streamNr + 1, This->pStreams + streamNr,
 480               (This->nStreams - streamNr) * sizeof(EditStreamTable));
 481       This->nStreams++;
 482
 483       IAVIStream_AddRef(This->pStreams[streamNr + 1].pStream);
 484       This->pStreams[streamNr + 1].dwStart  = streamPos + len;
 485       This->pStreams[streamNr + 1].dwLength =
 486         EditStreamEnd(This, streamNr) - This->pStreams[streamNr + 1].dwStart;
 487
 488       This->pStreams[streamNr].dwLength =
 489         streamPos - This->pStreams[streamNr].dwStart;
 490       This->sInfo.dwLength -= len;
 491       len = 0;
 492     }
 493   }
 494
 495   This->sInfo.dwEditCount++;
 496
 497   return AVIERR_OK;
 498 }
 499
 500 static HRESULT WINAPI IAVIEditStream_fnCopy(IAVIEditStream*iface,LONG*plStart,
 501                                             LONG*plLength,PAVISTREAM*ppResult)
 502 {
 503   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 504   IAVIEditStreamImpl* pEdit;
 505   HRESULT hr;
 506   LONG start = 0;
 507
 508   TRACE("(%p,%p,%p,%p)\n",iface,plStart,plLength,ppResult);
 509
 510   if (ppResult == NULL)
 511     return AVIERR_BADPARAM;
 512   *ppResult = NULL;
 513   if (plStart == NULL || plLength == NULL || *plStart < 0 || *plLength < 0)
 514     return AVIERR_BADPARAM;
 515
 516   /* check bounds */
 517   if (*(LPDWORD)plLength > This->sInfo.dwLength)
 518     *(LPDWORD)plLength = This->sInfo.dwLength;
 519   if (*(LPDWORD)plStart < This->sInfo.dwStart) {
 520     *(LPDWORD)plLength -= This->sInfo.dwStart - *(LPDWORD)plStart;
 521     *(LPDWORD)plStart   = This->sInfo.dwStart;
 522     if (*plLength < 0)
 523       return AVIERR_BADPARAM;
 524   }
 525   if (*(LPDWORD)plStart + *(LPDWORD)plLength > This->sInfo.dwStart + This->sInfo.dwLength)
 526     *(LPDWORD)plLength = This->sInfo.dwStart + This->sInfo.dwLength -
 527       *(LPDWORD)plStart;
 528
 529   pEdit = (IAVIEditStreamImpl*)AVIFILE_CreateEditStream(NULL);
 530   if (pEdit == NULL)
 531     return AVIERR_MEMORY;
 532
 533   hr = IAVIEditStream_Paste((PAVIEDITSTREAM)pEdit,&start,plLength,
 534                             (PAVISTREAM)&This->iAVIStream,*plStart,
 535                             *plStart + *plLength);
 536   *plStart = start;
 537   if (FAILED(hr))
 538     IAVIEditStream_Release((PAVIEDITSTREAM)pEdit);
 539   else
 540     *ppResult = (PAVISTREAM)&pEdit->iAVIStream;
 541
 542   return hr;
 543 }
 544
 545 static HRESULT WINAPI IAVIEditStream_fnPaste(IAVIEditStream*iface,LONG*plStart,
 546                                              LONG*plLength,PAVISTREAM pSource,
 547                                              LONG lStart,LONG lLength)
 548 {
 549   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 550   AVISTREAMINFOW      srcInfo;
 551   IEditStreamInternal*pInternal = NULL;
 552   IAVIEditStreamImpl *pEdit = NULL;
 553   PAVISTREAM          pStream;
 554   DWORD               startPos, endPos, streamNr, nStreams;
 555   ULONG               n;
 556
 557   TRACE("(%p,%p,%p,%p,%ld,%ld)\n",iface,plStart,plLength,
 558         pSource,lStart,lLength);
 559
 560   if (pSource == NULL)
 561     return AVIERR_BADHANDLE;
 562   if (plStart == NULL || *plStart < 0)
 563     return AVIERR_BADPARAM;
 564   if (This->sInfo.dwStart + This->sInfo.dwLength < *plStart)
 565     return AVIERR_BADPARAM; /* Can't paste with holes */
 566   if (FAILED(IAVIStream_Info(pSource, &srcInfo, sizeof(srcInfo))))
 567     return AVIERR_ERROR;
 568   if (lStart < srcInfo.dwStart || lStart >= srcInfo.dwStart + srcInfo.dwLength)
 569     return AVIERR_BADPARAM;
 570   if (This->sInfo.fccType == 0) {
 571     /* This stream is empty */
 572     IAVIStream_Info(pSource, &This->sInfo, sizeof(This->sInfo));
 573     This->sInfo.dwStart  = *plStart;
 574     This->sInfo.dwLength = 0;
 575   }
 576   if (This->sInfo.fccType != srcInfo.fccType)
 577     return AVIERR_UNSUPPORTED; /* different stream types */
 578   if (lLength == -1) /* Copy the hole stream */
 579     lLength = srcInfo.dwLength;
 580   if (lStart + lLength > srcInfo.dwStart + srcInfo.dwLength)
 581     lLength = srcInfo.dwStart + srcInfo.dwLength - lStart;
 582   if (lLength + *plStart >= 0x80000000)
 583     return AVIERR_MEMORY;
 584
 585   /* streamtype specific tests */
 586   if (srcInfo.fccType == streamtypeVIDEO) {
 587     LONG size;
 588
 589     size = srcInfo.rcFrame.right - srcInfo.rcFrame.left;
 590     if (size != This->sInfo.rcFrame.right - This->sInfo.rcFrame.left)
 591       return AVIERR_UNSUPPORTED; /* FIXME: Can't GetFrame convert it? */
 592     size = srcInfo.rcFrame.bottom - srcInfo.rcFrame.top;
 593     if (size != This->sInfo.rcFrame.bottom - This->sInfo.rcFrame.top)
 594       return AVIERR_UNSUPPORTED; /* FIXME: Can't GetFrame convert it? */
 595   } else if (srcInfo.fccType == streamtypeAUDIO) {
 596     if (! AVIFILE_FormatsEqual((PAVISTREAM)&This->iAVIStream, pSource))
 597       return AVIERR_UNSUPPORTED;
 598   } else {
 599     /* FIXME: streamtypeMIDI and streamtypeTEXT */
 600     return AVIERR_UNSUPPORTED;
 601   }
 602
 603   /* try to get an IEditStreamInternal interface */
 604   if (SUCCEEDED(IAVIStream_QueryInterface(pSource, &IID_IEditStreamInternal,
 605                                           (LPVOID*)&pInternal))) {
 606     pInternal->lpVtbl->GetEditStreamImpl(pInternal, (LPVOID*)&pEdit);
 607     pInternal->lpVtbl->Release(pInternal);
 608   }
 609
 610   /* for video must check for change of format */
 611   if (This->sInfo.fccType == streamtypeVIDEO) {
 612     if (! This->bDecompress) {
 613       /* Need to decompress if any of the following conditions matches:
 614        *  - pSource is an editable stream which decompresses
 615        *  - the nearest keyframe of pSource isn't lStart
 616        *  - the nearest keyframe of this stream isn't *plStart
 617        *  - the format of pSource doesn't match this one
 618        */
 619       if ((pEdit != NULL && pEdit->bDecompress) ||
 620           AVIStreamNearestKeyFrame(pSource, lStart) != lStart ||
 621           AVIStreamNearestKeyFrame((PAVISTREAM)&This->iAVIStream, *plStart) != *plStart ||
 622           (This->nStreams > 0 && !AVIFILE_FormatsEqual((PAVISTREAM)&This->iAVIStream, pSource))) {
 623         /* Use first stream part to get format to convert everything to */
 624         AVIFILE_ReadFrame(This, This->pStreams[0].pStream,
 625                           This->pStreams[0].dwStart);
 626
 627         /* Check if we could convert the source streams to the disired format... */
 628         if (pEdit != NULL) {
 629           if (FAILED(AVIFILE_FindStreamInTable(pEdit, lStart, &pStream,
 630                                                &startPos, &streamNr, TRUE)))
 631             return AVIERR_INTERNAL;
 632           for (n = lStart; n < lStart + lLength; streamNr++) {
 633             if (AVIFILE_ReadFrame(This, pEdit->pStreams[streamNr].pStream, startPos) == NULL)
 634               return AVIERR_BADFORMAT;
 635             startPos = pEdit->pStreams[streamNr].dwStart;
 636             n += pEdit->pStreams[streamNr].dwLength;
 637           }
 638         } else if (AVIFILE_ReadFrame(This, pSource, lStart) == NULL)
 639           return AVIERR_BADFORMAT;
 640
 641         This->bDecompress      = TRUE;
 642         This->sInfo.fccHandler = 0;
 643       }
 644     } else if (AVIFILE_ReadFrame(This, pSource, lStart) == NULL)
 645       return AVIERR_BADFORMAT; /* Can't convert source to own format */
 646   } /* FIXME: something special for the other formats? */
 647
 648   /* Make sure we have enough memory for parts */
 649   if (pEdit != NULL) {
 650     DWORD nLastStream;
 651
 652     AVIFILE_FindStreamInTable(pEdit, lStart + lLength, &pStream,
 653                               &endPos, &nLastStream, TRUE);
 654     AVIFILE_FindStreamInTable(pEdit, lStart, &pStream,
 655                               &startPos, &streamNr, FALSE);
 656     if (nLastStream == streamNr)
 657       nLastStream++;
 658
 659     nStreams = nLastStream - streamNr;
 660   } else
 661     nStreams = 1;
 662   if (This->nStreams + nStreams + 1 > This->nTableSize) {
 663     n = This->nStreams + nStreams + 33;
 664
 665     This->pStreams =
 666       GlobalReAllocPtr(This->pStreams, n * sizeof(EditStreamTable), GMEM_SHARE|GHND);
 667     if (This->pStreams == NULL)
 668       return AVIERR_MEMORY;
 669     This->nTableSize = n;
 670   }
 671
 672   if (plLength != NULL)
 673     *plLength = lLength;
 674
 675   /* now do the real work */
 676   if (This->sInfo.dwStart + This->sInfo.dwLength > *plStart) {
 677     AVIFILE_FindStreamInTable(This, *plStart, &pStream,
 678                               &startPos, &streamNr, FALSE);
 679     if (startPos != This->pStreams[streamNr].dwStart) {
 680       /* split stream streamNr at startPos */
 681       memmove(This->pStreams + streamNr + nStreams + 1,
 682               This->pStreams + streamNr,
 683               (This->nStreams + nStreams - streamNr + 1) * sizeof(EditStreamTable));
 684
 685       This->pStreams[streamNr + 2].dwLength =
 686         EditStreamEnd(This, streamNr + 2) - startPos;
 687       This->pStreams[streamNr + 2].dwStart = startPos;
 688       This->pStreams[streamNr].dwLength =
 689         startPos - This->pStreams[streamNr].dwStart;
 690       IAVIStream_AddRef(This->pStreams[streamNr].pStream);
 691       streamNr++;
 692     } else {
 693       /* insert before stream at streamNr */
 694       memmove(This->pStreams + streamNr + nStreams, This->pStreams + streamNr,
 695               (This->nStreams + nStreams - streamNr) * sizeof(EditStreamTable));
 696     }
 697   } else /* append the streams */
 698     streamNr = This->nStreams;
 699
 700   if (pEdit != NULL) {
 701     /* insert the parts of the editable stream instead of itself */
 702     AVIFILE_FindStreamInTable(pEdit, lStart + lLength, &pStream,
 703                               &endPos, NULL, FALSE);
 704     AVIFILE_FindStreamInTable(pEdit, lStart, &pStream, &startPos, &n, FALSE);
 705
 706     memcpy(This->pStreams + streamNr, pEdit->pStreams + n,
 707            nStreams * sizeof(EditStreamTable));
 708     if (This->pStreams[streamNr].dwStart < startPos) {
 709       This->pStreams[streamNr].dwLength =
 710         EditStreamEnd(This, streamNr) - startPos;
 711       This->pStreams[streamNr].dwStart  = startPos;
 712     }
 713     if (endPos < EditStreamEnd(This, streamNr + nStreams))
 714       This->pStreams[streamNr + nStreams].dwLength =
 715         endPos - This->pStreams[streamNr + nStreams].dwStart;
 716   } else {
 717     /* a simple stream */
 718     This->pStreams[streamNr].pStream  = pSource;
 719     This->pStreams[streamNr].dwStart  = lStart;
 720     This->pStreams[streamNr].dwLength = lLength;
 721   }
 722
 723   for (n = 0; n < nStreams; n++) {
 724     IAVIStream_AddRef(This->pStreams[streamNr + n].pStream);
 725     if (0 < streamNr + n &&
 726         This->pStreams[streamNr + n - 1].pStream != This->pStreams[streamNr + n].pStream) {
 727       This->sInfo.dwFlags |= AVISTREAMINFO_FORMATCHANGES;
 728       This->sInfo.dwFormatChangeCount++;
 729     }
 730   }
 731   This->sInfo.dwEditCount++;
 732   This->sInfo.dwLength += lLength;
 733   This->nStreams += nStreams;
 734
 735   return AVIERR_OK;
 736 }
 737
 738 static HRESULT WINAPI IAVIEditStream_fnClone(IAVIEditStream*iface,
 739                                              PAVISTREAM*ppResult)
 740 {
 741   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 742   IAVIEditStreamImpl* pEdit;
 743   DWORD i;
 744
 745   TRACE("(%p,%p)\n",iface,ppResult);
 746
 747   if (ppResult == NULL)
 748     return AVIERR_BADPARAM;
 749   *ppResult = NULL;
 750
 751   pEdit = (IAVIEditStreamImpl*)AVIFILE_CreateEditStream(NULL);
 752   if (pEdit == NULL)
 753     return AVIERR_MEMORY;
 754   if (This->nStreams > pEdit->nTableSize) {
 755     pEdit->pStreams = GlobalReAllocPtr(pEdit->pStreams, This->nStreams * sizeof(EditStreamTable),GMEM_SHARE|GHND);
 756     if (pEdit->pStreams == NULL)
 757       return AVIERR_MEMORY;
 758     pEdit->nTableSize = This->nStreams;
 759   }
 760   pEdit->nStreams = This->nStreams;
 761   memcpy(pEdit->pStreams, This->pStreams,
 762          This->nStreams * sizeof(EditStreamTable));
 763   memcpy(&pEdit->sInfo,&This->sInfo,sizeof(This->sInfo));
 764   for (i = 0; i < This->nStreams; i++) {
 765     if (pEdit->pStreams[i].pStream != NULL)
 766       IAVIStream_AddRef(pEdit->pStreams[i].pStream);
 767   }
 768
 769   *ppResult = (PAVISTREAM)&pEdit->iAVIStream;
 770
 771   return AVIERR_OK;
 772 }
 773
 774 static HRESULT WINAPI IAVIEditStream_fnSetInfo(IAVIEditStream*iface,
 775                                                LPAVISTREAMINFOW asi,LONG size)
 776 {
 777   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 778
 779   TRACE("(%p,%p,%ld)\n",iface,asi,size);
 780
 781   /* check parameters */
 782   if (asi == NULL)
 783     return AVIERR_BADPARAM;
 784   if (size != sizeof(AVISTREAMINFOW))
 785     return AVIERR_BADSIZE;
 786   if (asi->dwScale == 0 || asi->dwRate == 0 || (LONG)asi->dwQuality < -1 ||
 787       asi->dwQuality > ICQUALITY_HIGH)
 788     return AVIERR_ERROR;
 789
 790   This->sInfo.wLanguage = asi->wLanguage;
 791   This->sInfo.wPriority = asi->wPriority;
 792   This->sInfo.dwStart   = asi->dwStart;
 793   if (asi->dwRate != 0)
 794     This->sInfo.dwRate  = asi->dwRate;
 795   if (asi->dwScale != 0)
 796     This->sInfo.dwScale = asi->dwScale;
 797   if (asi->dwQuality <= ICQUALITY_HIGH)
 798     This->sInfo.dwQuality = ICQUALITY_HIGH;
 799   CopyRect(&This->sInfo.rcFrame, &asi->rcFrame);
 800   memcpy(&This->sInfo.szName, &asi->szName, sizeof(asi->szName));
 801   This->sInfo.dwEditCount++;
 802
 803   return AVIERR_OK;
 804 }
 805
 806 static HRESULT WINAPI IEditAVIStream_fnQueryInterface(IAVIStream*iface,
 807                                                       REFIID refiid,LPVOID*obj)
 808 {
 809   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
 810
 811   assert(This->pae != NULL);
 812
 813   return IAVIEditStream_QueryInterface((IAVIEditStream*)This->pae,refiid,obj);
 814 }
 815
 816 static ULONG   WINAPI IEditAVIStream_fnAddRef(IAVIStream*iface)
 817 {
 818   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
 819
 820   assert(This->pae != NULL);
 821
 822   return IAVIEditStream_AddRef((IAVIEditStream*)This->pae);
 823 }
 824
 825 static ULONG   WINAPI IEditAVIStream_fnRelease(IAVIStream*iface)
 826 {
 827   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
 828
 829   assert(This->pae != NULL);
 830
 831   return IAVIEditStream_Release((IAVIEditStream*)This->pae);
 832 }
 833
 834 static HRESULT WINAPI IEditAVIStream_fnCreate(IAVIStream*iface,
 835                                               LPARAM lParam1,LPARAM lParam2)
 836 {
 837   IAVIEditStreamImpl *This = ((IEditAVIStreamImpl*)iface)->pae;
 838
 839   if (lParam2 != 0)
 840     return AVIERR_ERROR;
 841
 842   if (This->pStreams == NULL) {
 843     This->pStreams =
 844       GlobalAllocPtr(GMEM_SHARE|GHND, 256 * sizeof(EditStreamTable));
 845     if (This->pStreams == NULL)
 846       return AVIERR_MEMORY;
 847     This->nTableSize = 256;
 848   }
 849
 850   if (lParam1 != 0) {
 851     IAVIStream_Info((PAVISTREAM)lParam1, &This->sInfo, sizeof(This->sInfo));
 852     IAVIStream_AddRef((PAVISTREAM)lParam1);
 853     This->pStreams[0].pStream  = (PAVISTREAM)lParam1;
 854     This->pStreams[0].dwStart  = This->sInfo.dwStart;
 855     This->pStreams[0].dwLength = This->sInfo.dwLength;
 856     This->nStreams = 1;
 857   }
 858   return AVIERR_OK;
 859 }
 860
 861 static HRESULT WINAPI IEditAVIStream_fnInfo(IAVIStream*iface,
 862                                             AVISTREAMINFOW *psi,LONG size)
 863 {
 864   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
 865
 866   TRACE("(%p,%p,%ld)\n",iface,psi,size);
 867
 868   assert(This->pae != NULL);
 869
 870   if (psi == NULL)
 871     return AVIERR_BADPARAM;
 872   if (size < 0)
 873     return AVIERR_BADSIZE;
 874
 875   if (This->pae->bDecompress)
 876     This->pae->sInfo.fccHandler = 0;
 877
 878   memcpy(psi, &This->pae->sInfo, min((DWORD)size, sizeof(This->pae->sInfo)));
 879
 880   if ((DWORD)size < sizeof(This->pae->sInfo))
 881     return AVIERR_BUFFERTOOSMALL;
 882   return AVIERR_OK;
 883 }
 884
 885 static LONG    WINAPI IEditAVIStream_fnFindSample(IAVIStream*iface,LONG pos,
 886                                                   LONG flags)
 887 {
 888   IAVIEditStreamImpl* const This = ((IEditAVIStreamImpl* const)iface)->pae;
 889   PAVISTREAM stream;
 890   DWORD      streamPos, streamNr;
 891
 892   TRACE("(%p,%ld,0x%08lX)\n",iface,pos,flags);
 893
 894   if (flags & FIND_FROM_START)
 895     pos = (LONG)This->sInfo.dwStart;
 896
 897   /* outside of stream? */
 898   if (pos < (LONG)This->sInfo.dwStart ||
 899       (LONG)This->sInfo.dwStart + (LONG)This->sInfo.dwLength <= pos)
 900     return -1;
 901
 902   /* map our position to a stream and position in it */
 903   if (AVIFILE_FindStreamInTable(This, pos, &stream, &streamPos,
 904                                 &streamNr, TRUE))
 905     return -1; /* doesn't exist */
 906
 907   if (This->bDecompress) {
 908     /* only one stream -- format changes only at start */
 909     if (flags & FIND_FORMAT)
 910       return (flags & FIND_NEXT ? -1 : 0);
 911
 912     /* FIXME: map positions back to us */
 913     return IAVIStream_FindSample(stream, streamPos, flags);
 914   } else {
 915     /* assume change of format every frame */
 916     return pos;
 917   }
 918 }
 919
 920 static HRESULT WINAPI IEditAVIStream_fnReadFormat(IAVIStream*iface,LONG pos,
 921                                                   LPVOID format,LONG*fmtsize)
 922 {
 923   IAVIEditStreamImpl* const This = ((IEditAVIStreamImpl* const)iface)->pae;
 924   LPBITMAPINFOHEADER  lp;
 925   PAVISTREAM          stream;
 926   DWORD               n;
 927   HRESULT             hr;
 928
 929   TRACE("(%p,%ld,%p,%p)\n",iface,pos,format,fmtsize);
 930
 931   if (fmtsize == NULL || pos < This->sInfo.dwStart ||
 932       This->sInfo.dwStart + This->sInfo.dwLength <= pos)
 933     return AVIERR_BADPARAM;
 934
 935   /* find stream corresponding to position */
 936   hr = AVIFILE_FindStreamInTable(This, pos, &stream, &n, NULL, FALSE);
 937   if (FAILED(hr))
 938     return hr;
 939
 940   if (! This->bDecompress)
 941     return IAVIStream_ReadFormat(stream, n, format, fmtsize);
 942
 943   lp = (LPBITMAPINFOHEADER)AVIFILE_ReadFrame(This, stream, n);
 944   if (lp == NULL)
 945     return AVIERR_ERROR;
 946   if (lp->biBitCount <= 8) {
 947     n  = (lp->biClrUsed > 0 ? lp->biClrUsed : 1 << lp->biBitCount);
 948     n *= sizeof(RGBQUAD);
 949   } else
 950     n = 0;
 951   n += lp->biSize;
 952
 953   memcpy(format, lp, min((LONG)n, *fmtsize));
 954   hr = ((LONG)n > *fmtsize ? AVIERR_BUFFERTOOSMALL : AVIERR_OK);
 955   *fmtsize = n;
 956
 957   return hr;
 958 }
 959
 960 static HRESULT WINAPI IEditAVIStream_fnSetFormat(IAVIStream*iface,LONG pos,
 961                                                  LPVOID format,LONG formatsize)
 962 {
 963   TRACE("(%p,%ld,%p,%ld)\n",iface,pos,format,formatsize);
 964
 965   return AVIERR_UNSUPPORTED;
 966 }
 967
 968 static HRESULT WINAPI IEditAVIStream_fnRead(IAVIStream*iface,LONG start,
 969                                             LONG samples,LPVOID buffer,
 970                                             LONG buffersize,LONG*bytesread,
 971                                             LONG*samplesread)
 972 {
 973   IAVIEditStreamImpl* const This = ((IEditAVIStreamImpl* const)iface)->pae;
 974   PAVISTREAM stream;
 975   DWORD   streamPos, streamNr;
 976   LONG    readBytes, readSamples, count;
 977   HRESULT hr;
 978
 979   TRACE("(%p,%ld,%ld,%p,%ld,%p,%p) -- 0x%08lX\n",iface,start,samples,
 980         buffer,buffersize,bytesread,samplesread,This->sInfo.fccType);
 981
 982   /* check parameters */
 983   if (bytesread != NULL)
 984     *bytesread = 0;
 985   if (samplesread != NULL)
 986     *samplesread = 0;
 987   if (buffersize < 0)
 988     return AVIERR_BADSIZE;
 989   if ((DWORD)start < This->sInfo.dwStart ||
 990       This->sInfo.dwStart + This->sInfo.dwLength < (DWORD)start)
 991     return AVIERR_BADPARAM;
 992
 993   if (! This->bDecompress) {
 994     /* audio like data -- sample-based */
 995     do {
 996       if (samples == 0)
 997         return AVIERR_OK; /* nothing at all or already done */
 998
 999       if (FAILED(AVIFILE_FindStreamInTable(This, start, &stream,
1000                                            &streamPos, &streamNr, FALSE)))
1001         return AVIERR_ERROR;
1002
1003       /* limit to end of the stream */
1004       count = samples;
1005       if (streamPos + count > EditStreamEnd(This, streamNr))
1006         count = EditStreamEnd(This, streamNr) - streamPos;
1007
1008       hr = IAVIStream_Read(stream, streamPos, count, buffer, buffersize,
1009                            &readBytes, &readSamples);
1010       if (FAILED(hr))
1011         return hr;
1012       if (readBytes == 0 && readSamples == 0 && count != 0)
1013         return AVIERR_FILEREAD; /* for bad stream implementations */
1014
1015       if (samplesread != NULL)
1016         *samplesread += readSamples;
1017       if (bytesread != NULL)
1018         *bytesread += readBytes;
1019       if (buffer != NULL) {
1020         buffer = ((LPBYTE)buffer)+readBytes;
1021         buffersize     -= readBytes;
1022       }
1023       start   += count;
1024       samples -= count;
1025     } while (This->sInfo.dwStart + This->sInfo.dwLength > start);
1026   } else {
1027     /* video like data -- frame-based */
1028     LPBITMAPINFOHEADER lp;
1029
1030     if (samples == 0)
1031       return AVIERR_OK;
1032
1033     if (FAILED(AVIFILE_FindStreamInTable(This, start, &stream,
1034                                          &streamPos, &streamNr, FALSE)))
1035       return AVIERR_ERROR;
1036
1037     lp = AVIFILE_ReadFrame(This, stream, streamPos);
1038     if (lp == NULL)
1039       return AVIERR_ERROR;
1040
1041     if (buffer != NULL) {
1042       /* need size of format to skip */
1043       if (lp->biBitCount <= 8) {
1044         count  = lp->biClrUsed > 0 ? lp->biClrUsed : 1 << lp->biBitCount;
1045         count *= sizeof(RGBQUAD);
1046       } else
1047         count = 0;
1048       count += lp->biSize;
1049
1050       if (buffersize < lp->biSizeImage)
1051         return AVIERR_BUFFERTOOSMALL;
1052       memcpy(buffer, (LPBYTE)lp + count, lp->biSizeImage);
1053     }
1054
1055     if (bytesread != NULL)
1056       *bytesread = lp->biSizeImage;
1057     if (samplesread != NULL)
1058       *samplesread = 1;
1059   }
1060
1061   return AVIERR_OK;
1062 }
1063
1064 static HRESULT WINAPI IEditAVIStream_fnWrite(IAVIStream*iface,LONG start,
1065                                              LONG samples,LPVOID buffer,
1066                                              LONG buffersize,DWORD flags,
1067                                              LONG*sampwritten,LONG*byteswritten)
1068 {
1069   TRACE("(%p,%ld,%ld,%p,%ld,0x%08lX,%p,%p)\n",iface,start,samples,buffer,
1070         buffersize,flags,sampwritten,byteswritten);
1071
1072   /* be sure return parameters have correct values */
1073   if (sampwritten != NULL)
1074     *sampwritten = 0;
1075   if (byteswritten != NULL)
1076     *byteswritten = 0;
1077
1078   return AVIERR_UNSUPPORTED;
1079 }
1080
1081 static HRESULT WINAPI IEditAVIStream_fnDelete(IAVIStream*iface,LONG start,
1082                                               LONG samples)
1083 {
1084   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
1085
1086   TRACE("(%p,%ld,%ld)\n",iface,start,samples);
1087
1088   return IAVIEditStream_Cut((IAVIEditStream*)This->pae,&start,&samples,NULL);
1089 }
1090
1091 static HRESULT WINAPI IEditAVIStream_fnReadData(IAVIStream*iface,DWORD fcc,
1092                                                 LPVOID lp,LONG *lpread)
1093 {
1094   IAVIEditStreamImpl* const This = ((IEditAVIStreamImpl* const)iface)->pae;
1095   DWORD n;
1096
1097   TRACE("(%p,0x%08lX,%p,%p)\n",iface,fcc,lp,lpread);
1098
1099   /* check parameters */
1100   if (lp == NULL || lpread == NULL)
1101     return AVIERR_BADPARAM;
1102
1103   /* simply ask every stream and return the first block found */
1104   for (n = 0; n < This->nStreams; n++) {
1105     HRESULT hr = IAVIStream_ReadData(This->pStreams[n].pStream,fcc,lp,lpread);
1106
1107     if (SUCCEEDED(hr))
1108       return hr;
1109   }
1110
1111   *lpread = 0;
1112   return AVIERR_NODATA;
1113 }
1114
1115 static HRESULT WINAPI IEditAVIStream_fnWriteData(IAVIStream*iface,DWORD fcc,
1116                                                  LPVOID lp,LONG size)
1117 {
1118   TRACE("(%p,0x%08lX,%p,%ld)\n",iface,fcc,lp,size);
1119
1120   return AVIERR_UNSUPPORTED;
1121 }
1122
1123 static HRESULT WINAPI IEditAVIStream_fnSetInfo(IAVIStream*iface,
1124                                                AVISTREAMINFOW*info,LONG len)
1125 {
1126   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
1127
1128   TRACE("(%p,%p,%ld)\n",iface,info,len);
1129
1130   return IAVIEditStream_SetInfo((IAVIEditStream*)This->pae,info,len);
1131 }
1132
1133 static HRESULT WINAPI IEditStreamInternal_fnQueryInterface(IEditStreamInternal*iface,REFIID refiid,LPVOID*obj)
1134 {
1135   IEditStreamInternalImpl *This = (IEditStreamInternalImpl *)iface;
1136
1137   assert(This->pae != NULL);
1138
1139   return IAVIEditStream_QueryInterface((IAVIEditStream*)This->pae, refiid, obj);
1140 }
1141
1142 static ULONG   WINAPI IEditStreamInternal_fnAddRef(IEditStreamInternal*iface)
1143 {
1144   IEditStreamInternalImpl *This = (IEditStreamInternalImpl *)iface;
1145
1146   assert(This->pae != NULL);
1147
1148   return IAVIEditStream_AddRef((IAVIEditStream*)This->pae);
1149 }
1150
1151 static ULONG   WINAPI IEditStreamInternal_fnRelease(IEditStreamInternal*iface)
1152 {
1153   IEditStreamInternalImpl *This = (IEditStreamInternalImpl *)iface;
1154
1155   assert(This->pae != NULL);
1156
1157   return IAVIEditStream_Release((IAVIEditStream*)This->pae);
1158 }
1159
1160 static HRESULT  WINAPI IEditStreamInternal_fnGetEditStreamImpl(IEditStreamInternal*iface,LPVOID*ppimpl)
1161 {
1162   IEditStreamInternalImpl *This = (IEditStreamInternalImpl *)iface;
1163
1164   TRACE("(%p,%p) -> %p\n", iface, ppimpl, This->pae);
1165
1166   assert(This->pae != NULL);
1167   assert(ppimpl != NULL);
1168
1169   *ppimpl = This->pae;
1170   return AVIERR_OK;
1171 }