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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include <assert.h>
  20 #include <stdarg.h>
  21
  22 #include "windef.h"
  23 #include "winbase.h"
  24 #include "winuser.h"
  25 #include "wingdi.h"
  26 #include "winerror.h"
  27 #include "mmsystem.h"
  28 #include "vfw.h"
  29
  30 #include "avifile_private.h"
  31 #include "extrachunk.h"
  32
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(avifile);
  36
  37 /***********************************************************************/
  38
  39 /* internal interface to get access to table of stream in an editable stream */
  40
  41 typedef struct _EditStreamTable {
  42   PAVISTREAM pStream;  /* stream which contains the data */
  43   DWORD      dwStart;  /* where starts the part which is also our */
  44   DWORD      dwLength; /* how many is also in this stream */
  45 } EditStreamTable;
  46
  47 #define INTERFACE IEditStreamInternal
  48 DECLARE_INTERFACE_(IEditStreamInternal,IUnknown)
  49 {
  50     /*** IUnknown methods ***/
  51     STDMETHOD_(HRESULT,QueryInterface)(THIS_ REFIID riid, void** ppvObject) PURE;
  52     STDMETHOD_(ULONG,AddRef)(THIS) PURE;
  53     STDMETHOD_(ULONG,Release)(THIS) PURE;
  54     /*** IEditStreamInternal methods ***/
  55     STDMETHOD(GetEditStreamImpl)(THIS_ LPVOID*) PURE;
  56 };
  57 #undef INTERFACE
  58
  59 #define EditStreamEnd(This,streamNr) ((This)->pStreams[streamNr].dwStart + \
  60                                       (This)->pStreams[streamNr].dwLength)
  61
  62 /***********************************************************************/
  63
  64 static HRESULT WINAPI IAVIEditStream_fnQueryInterface(IAVIEditStream*iface,REFIID refiid,LPVOID *obj);
  65 static ULONG   WINAPI IAVIEditStream_fnAddRef(IAVIEditStream*iface);
  66 static ULONG   WINAPI IAVIEditStream_fnRelease(IAVIEditStream*iface);
  67 static HRESULT WINAPI IAVIEditStream_fnCut(IAVIEditStream*iface,LONG*plStart,
  68                                            LONG*plLength,PAVISTREAM*ppResult);
  69 static HRESULT WINAPI IAVIEditStream_fnCopy(IAVIEditStream*iface,LONG*plStart,
  70                                             LONG*plLength,PAVISTREAM*ppResult);
  71 static HRESULT WINAPI IAVIEditStream_fnPaste(IAVIEditStream*iface,LONG*plStart,
  72                                              LONG*plLength,PAVISTREAM pSource,
  73                                              LONG lStart,LONG lEnd);
  74 static HRESULT WINAPI IAVIEditStream_fnClone(IAVIEditStream*iface,
  75                                              PAVISTREAM*ppResult);
  76 static HRESULT WINAPI IAVIEditStream_fnSetInfo(IAVIEditStream*iface,
  77                                                LPAVISTREAMINFOW asi,LONG size);
  78
  79 static const struct IAVIEditStreamVtbl ieditstream = {
  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 static const struct IAVIStreamVtbl ieditstast = {
 115   IEditAVIStream_fnQueryInterface,
 116   IEditAVIStream_fnAddRef,
 117   IEditAVIStream_fnRelease,
 118   IEditAVIStream_fnCreate,
 119   IEditAVIStream_fnInfo,
 120   IEditAVIStream_fnFindSample,
 121   IEditAVIStream_fnReadFormat,
 122   IEditAVIStream_fnSetFormat,
 123   IEditAVIStream_fnRead,
 124   IEditAVIStream_fnWrite,
 125   IEditAVIStream_fnDelete,
 126   IEditAVIStream_fnReadData,
 127   IEditAVIStream_fnWriteData,
 128   IEditAVIStream_fnSetInfo
 129 };
 130
 131 static HRESULT WINAPI IEditStreamInternal_fnQueryInterface(IEditStreamInternal*iface,REFIID refiid,LPVOID*obj);
 132 static ULONG   WINAPI IEditStreamInternal_fnAddRef(IEditStreamInternal*iface);
 133 static ULONG   WINAPI IEditStreamInternal_fnRelease(IEditStreamInternal*iface);
 134 static HRESULT WINAPI IEditStreamInternal_fnGetEditStreamImpl(IEditStreamInternal*iface,LPVOID*ppimpl);
 135
 136 static const struct IEditStreamInternalVtbl ieditstreaminternal = {
 137   IEditStreamInternal_fnQueryInterface,
 138   IEditStreamInternal_fnAddRef,
 139   IEditStreamInternal_fnRelease,
 140   IEditStreamInternal_fnGetEditStreamImpl
 141 };
 142
 143 typedef struct _IAVIEditStreamImpl IAVIEditStreamImpl;
 144
 145 typedef struct _IEditAVIStreamImpl {
 146   /* IUnknown stuff */
 147   const IAVIStreamVtbl *lpVtbl;
 148
 149   /* IAVIStream stuff */
 150   IAVIEditStreamImpl *pae;
 151 } IEditAVIStreamImpl;
 152
 153 typedef struct _IEditStreamInternalImpl {
 154   /* IUnknown stuff */
 155   const IEditStreamInternalVtbl *lpVtbl;
 156
 157   /* IEditStreamInternal stuff */
 158   IAVIEditStreamImpl *pae;
 159 } IEditStreamInternalImpl;
 160
 161 struct _IAVIEditStreamImpl {
 162   /* IUnknown stuff */
 163   const IAVIEditStreamVtbl *lpVtbl;
 164   LONG  ref;
 165
 166   /* IAVIEditStream stuff */
 167   IEditAVIStreamImpl      iAVIStream;
 168   IEditStreamInternalImpl iEditStreamInternal;
 169
 170   AVISTREAMINFOW       sInfo;
 171
 172   EditStreamTable     *pStreams;
 173   DWORD                nStreams;   /* current fill level of pStreams table */
 174   DWORD                nTableSize; /* size of pStreams table */
 175
 176   BOOL                 bDecompress;
 177   PAVISTREAM           pCurStream;
 178   PGETFRAME            pg;         /* IGetFrame for pCurStream */
 179   LPBITMAPINFOHEADER   lpFrame;    /* frame of pCurStream */
 180 };
 181
 182 /***********************************************************************/
 183
 184 PAVIEDITSTREAM AVIFILE_CreateEditStream(PAVISTREAM pstream)
 185 {
 186   IAVIEditStreamImpl *pedit = NULL;
 187
 188   pedit = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IAVIEditStreamImpl));
 189   if (pedit == NULL)
 190     return NULL;
 191
 192   pedit->lpVtbl            = &ieditstream;
 193   pedit->iAVIStream.lpVtbl = &ieditstast;
 194   pedit->iAVIStream.pae    = pedit;
 195   pedit->iEditStreamInternal.lpVtbl = &ieditstreaminternal;
 196   pedit->iEditStreamInternal.pae    = pedit;
 197   pedit->ref = 1;
 198
 199   IAVIStream_Create((PAVISTREAM)&pedit->iAVIStream,(LPARAM)pstream,0);
 200
 201   return (PAVIEDITSTREAM)pedit;
 202 }
 203
 204 static HRESULT AVIFILE_FindStreamInTable(IAVIEditStreamImpl* const This,
 205                                          DWORD pos,PAVISTREAM *ppStream,
 206                                          DWORD* streamPos,
 207                                          DWORD* streamNr,BOOL bFindSample)
 208 {
 209   DWORD n;
 210
 211   TRACE("(%p,%u,%p,%p,%p,%d)\n",This,pos,ppStream,streamPos,
 212         streamNr,bFindSample);
 213
 214   if (pos < This->sInfo.dwStart)
 215     return AVIERR_BADPARAM;
 216
 217   pos -= This->sInfo.dwStart;
 218   for (n = 0; n < This->nStreams; n++) {
 219     if (pos < This->pStreams[n].dwLength) {
 220       *ppStream  = This->pStreams[n].pStream;
 221       *streamPos = This->pStreams[n].dwStart + pos;
 222       if (streamNr != NULL)
 223         *streamNr = n;
 224
 225       return AVIERR_OK;
 226     }
 227     pos -= This->pStreams[n].dwLength;
 228   }
 229   if (pos == 0 && bFindSample) {
 230     *ppStream  = This->pStreams[--n].pStream;
 231     *streamPos = EditStreamEnd(This, n);
 232     if (streamNr != NULL)
 233       *streamNr = n;
 234
 235     TRACE(" -- pos=0 && b=1 -> (%p,%u,%u)\n",*ppStream, *streamPos, n);
 236     return AVIERR_OK;
 237   } else {
 238     *ppStream = NULL;
 239     *streamPos = 0;
 240     if (streamNr != NULL)
 241       *streamNr = 0;
 242
 243     TRACE(" -> ERROR (NULL,0,0)\n");
 244     return AVIERR_BADPARAM;
 245   }
 246 }
 247
 248 static LPVOID AVIFILE_ReadFrame(IAVIEditStreamImpl* const This,
 249                                 PAVISTREAM pstream, LONG pos)
 250 {
 251   PGETFRAME pg;
 252
 253   TRACE("(%p,%p,%d)\n",This,pstream,pos);
 254
 255   if (pstream == NULL)
 256     return NULL;
 257
 258   /* if stream changes make sure that only palette changes */
 259   if (This->pCurStream != pstream) {
 260     pg = AVIStreamGetFrameOpen(pstream, NULL);
 261     if (pg == NULL)
 262       return NULL;
 263     if (This->pg != NULL) {
 264       if (IGetFrame_SetFormat(pg, This->lpFrame, NULL, 0, 0, -1, -1) != S_OK) {
 265         AVIStreamGetFrameClose(pg);
 266         ERR(": IGetFrame_SetFormat failed\n");
 267         return NULL;
 268       }
 269       AVIStreamGetFrameClose(This->pg);
 270     }
 271     This->pg         = pg;
 272     This->pCurStream = pstream;
 273   }
 274
 275   /* now get the decompressed frame */
 276   This->lpFrame = AVIStreamGetFrame(This->pg, pos);
 277   if (This->lpFrame != NULL)
 278     This->sInfo.dwSuggestedBufferSize = This->lpFrame->biSizeImage;
 279
 280   return This->lpFrame;
 281 }
 282
 283 static HRESULT AVIFILE_RemoveStream(IAVIEditStreamImpl* const This, DWORD nr)
 284 {
 285   assert(This != NULL);
 286   assert(nr < This->nStreams);
 287
 288   /* remove part nr */
 289   IAVIStream_Release(This->pStreams[nr].pStream);
 290   This->nStreams--;
 291   if (This->nStreams - nr > 0) {
 292     memmove(This->pStreams + nr, This->pStreams + nr + 1,
 293             (This->nStreams - nr) * sizeof(EditStreamTable));
 294   }
 295   This->pStreams[This->nStreams].pStream  = NULL;
 296   This->pStreams[This->nStreams].dwStart  = 0;
 297   This->pStreams[This->nStreams].dwLength = 0;
 298
 299   /* try to merge the part before the deleted one and the one after it */
 300   if (0 < nr && 0 < This->nStreams &&
 301       This->pStreams[nr - 1].pStream == This->pStreams[nr].pStream) {
 302     if (EditStreamEnd(This, nr - 1) == This->pStreams[nr].dwStart) {
 303       This->pStreams[nr - 1].dwLength += This->pStreams[nr].dwLength;
 304       return AVIFILE_RemoveStream(This, nr);
 305     }
 306   }
 307
 308   return AVIERR_OK;
 309 }
 310
 311 static BOOL AVIFILE_FormatsEqual(PAVISTREAM avi1, PAVISTREAM avi2)
 312 {
 313   LPVOID fmt1 = NULL, fmt2 = NULL;
 314   LONG size1, size2, start1, start2;
 315   BOOL status = FALSE;
 316
 317   assert(avi1 != NULL && avi2 != NULL);
 318
 319   /* get stream starts and check format sizes */
 320   start1 = AVIStreamStart(avi1);
 321   start2 = AVIStreamStart(avi2);
 322   if (FAILED(AVIStreamFormatSize(avi1, start1, &size1)))
 323     return FALSE;
 324   if (FAILED(AVIStreamFormatSize(avi2, start2, &size2)))
 325     return FALSE;
 326   if (size1 != size2)
 327     return FALSE;
 328
 329   /* sizes match, now get formats and compare them */
 330   fmt1 = HeapAlloc(GetProcessHeap(), 0, size1);
 331   if (fmt1 == NULL)
 332     return FALSE;
 333   if (SUCCEEDED(AVIStreamReadFormat(avi1, start1, fmt1, &size1))) {
 334     fmt2 = HeapAlloc(GetProcessHeap(), 0, size1);
 335     if (fmt2 != NULL) {
 336       if (SUCCEEDED(AVIStreamReadFormat(avi2, start2, fmt2, &size1)))
 337         status = (memcmp(fmt1, fmt2, size1) == 0);
 338     }
 339   }
 340
 341   HeapFree(GetProcessHeap(), 0, fmt2);
 342   HeapFree(GetProcessHeap(), 0, fmt1);
 343
 344   return status;
 345 }
 346
 347 /***********************************************************************/
 348
 349 static HRESULT WINAPI IAVIEditStream_fnQueryInterface(IAVIEditStream*iface,REFIID refiid,LPVOID *obj)
 350 {
 351   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 352
 353   TRACE("(%p,%s,%p)\n", This, debugstr_guid(refiid), obj);
 354
 355   if (IsEqualGUID(&IID_IUnknown, refiid) ||
 356       IsEqualGUID(&IID_IAVIEditStream, refiid)) {
 357     *obj = iface;
 358     IAVIEditStream_AddRef(iface);
 359
 360     return S_OK;
 361   } else if (IsEqualGUID(&IID_IAVIStream, refiid)) {
 362     *obj = &This->iAVIStream;
 363     IAVIEditStream_AddRef(iface);
 364
 365     return S_OK;
 366   } else if (IsEqualGUID(&IID_IEditStreamInternal, refiid)) {
 367     *obj = &This->iEditStreamInternal;
 368     IAVIEditStream_AddRef(iface);
 369
 370     return S_OK;
 371   }
 372
 373   return OLE_E_ENUM_NOMORE;
 374 }
 375
 376 static ULONG   WINAPI IAVIEditStream_fnAddRef(IAVIEditStream*iface)
 377 {
 378   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 379   ULONG ref = InterlockedIncrement(&This->ref);
 380
 381   TRACE("(%p) -> %d\n", iface, ref);
 382
 383   return ref;
 384 }
 385
 386 static ULONG   WINAPI IAVIEditStream_fnRelease(IAVIEditStream*iface)
 387 {
 388   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 389   DWORD i;
 390   ULONG ref = InterlockedDecrement(&This->ref);
 391
 392   TRACE("(%p) -> %d\n", iface, ref);
 393
 394   if (!ref) {
 395     /* release 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       HeapFree(GetProcessHeap(), 0, This->pStreams);
 404     }
 405
 406     HeapFree(GetProcessHeap(), 0, This);
 407     return 0;
 408   }
 409   return ref;
 410 }
 411
 412 static HRESULT WINAPI IAVIEditStream_fnCut(IAVIEditStream*iface,LONG*plStart,
 413                                            LONG*plLength,PAVISTREAM*ppResult)
 414 {
 415   IAVIEditStreamImpl *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 cut 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 = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, This->pStreams,
 470                                      (This->nTableSize + 32) * sizeof(EditStreamTable));
 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   IAVIEditStreamImpl *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   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 546   AVISTREAMINFOW      srcInfo;
 547   IEditStreamInternal*pInternal = NULL;
 548   IAVIEditStreamImpl *pEdit = NULL;
 549   PAVISTREAM          pStream;
 550   DWORD               startPos, endPos, streamNr, nStreams;
 551   ULONG               n;
 552
 553   TRACE("(%p,%p,%p,%p,%d,%d)\n",iface,plStart,plLength,
 554         pSource,lStart,lLength);
 555
 556   if (pSource == NULL)
 557     return AVIERR_BADHANDLE;
 558   if (plStart == NULL || *plStart < 0)
 559     return AVIERR_BADPARAM;
 560   if (This->sInfo.dwStart + This->sInfo.dwLength < *plStart)
 561     return AVIERR_BADPARAM; /* Can't paste with holes */
 562   if (FAILED(IAVIStream_Info(pSource, &srcInfo, sizeof(srcInfo))))
 563     return AVIERR_ERROR;
 564   if (lStart < srcInfo.dwStart || lStart >= srcInfo.dwStart + srcInfo.dwLength)
 565     return AVIERR_BADPARAM;
 566   if (This->sInfo.fccType == 0) {
 567     /* This stream is empty */
 568     IAVIStream_Info(pSource, &This->sInfo, sizeof(This->sInfo));
 569     This->sInfo.dwStart  = *plStart;
 570     This->sInfo.dwLength = 0;
 571   }
 572   if (This->sInfo.fccType != srcInfo.fccType)
 573     return AVIERR_UNSUPPORTED; /* different stream types */
 574   if (lLength == -1) /* Copy the hole stream */
 575     lLength = srcInfo.dwLength;
 576   if (lStart + lLength > srcInfo.dwStart + srcInfo.dwLength)
 577     lLength = srcInfo.dwStart + srcInfo.dwLength - lStart;
 578   if (lLength + *plStart >= 0x80000000)
 579     return AVIERR_MEMORY;
 580
 581   /* streamtype specific tests */
 582   if (srcInfo.fccType == streamtypeVIDEO) {
 583     LONG size;
 584
 585     size = srcInfo.rcFrame.right - srcInfo.rcFrame.left;
 586     if (size != This->sInfo.rcFrame.right - This->sInfo.rcFrame.left)
 587       return AVIERR_UNSUPPORTED; /* FIXME: Can't GetFrame convert it? */
 588     size = srcInfo.rcFrame.bottom - srcInfo.rcFrame.top;
 589     if (size != This->sInfo.rcFrame.bottom - This->sInfo.rcFrame.top)
 590       return AVIERR_UNSUPPORTED; /* FIXME: Can't GetFrame convert it? */
 591   } else if (srcInfo.fccType == streamtypeAUDIO) {
 592     if (! AVIFILE_FormatsEqual((PAVISTREAM)&This->iAVIStream, pSource))
 593       return AVIERR_UNSUPPORTED;
 594   } else {
 595     /* FIXME: streamtypeMIDI and streamtypeTEXT */
 596     return AVIERR_UNSUPPORTED;
 597   }
 598
 599   /* try to get an IEditStreamInternal interface */
 600   if (SUCCEEDED(IAVIStream_QueryInterface(pSource, &IID_IEditStreamInternal,
 601                                           (LPVOID*)&pInternal))) {
 602     pInternal->lpVtbl->GetEditStreamImpl(pInternal, (LPVOID*)&pEdit);
 603     pInternal->lpVtbl->Release(pInternal);
 604   }
 605
 606   /* for video must check for change of format */
 607   if (This->sInfo.fccType == streamtypeVIDEO) {
 608     if (! This->bDecompress) {
 609       /* Need to decompress if any of the following conditions matches:
 610        *  - pSource is an editable stream which decompresses
 611        *  - the nearest keyframe of pSource isn't lStart
 612        *  - the nearest keyframe of this stream isn't *plStart
 613        *  - the format of pSource doesn't match this one
 614        */
 615       if ((pEdit != NULL && pEdit->bDecompress) ||
 616           AVIStreamNearestKeyFrame(pSource, lStart) != lStart ||
 617           AVIStreamNearestKeyFrame((PAVISTREAM)&This->iAVIStream, *plStart) != *plStart ||
 618           (This->nStreams > 0 && !AVIFILE_FormatsEqual((PAVISTREAM)&This->iAVIStream, pSource))) {
 619         /* Use first stream part to get format to convert everything to */
 620         AVIFILE_ReadFrame(This, This->pStreams[0].pStream,
 621                           This->pStreams[0].dwStart);
 622
 623         /* Check if we could convert the source streams to the desired format... */
 624         if (pEdit != NULL) {
 625           if (FAILED(AVIFILE_FindStreamInTable(pEdit, lStart, &pStream,
 626                                                &startPos, &streamNr, TRUE)))
 627             return AVIERR_INTERNAL;
 628           for (n = lStart; n < lStart + lLength; streamNr++) {
 629             if (AVIFILE_ReadFrame(This, pEdit->pStreams[streamNr].pStream, startPos) == NULL)
 630               return AVIERR_BADFORMAT;
 631             startPos = pEdit->pStreams[streamNr].dwStart;
 632             n += pEdit->pStreams[streamNr].dwLength;
 633           }
 634         } else if (AVIFILE_ReadFrame(This, pSource, lStart) == NULL)
 635           return AVIERR_BADFORMAT;
 636
 637         This->bDecompress      = TRUE;
 638         This->sInfo.fccHandler = 0;
 639       }
 640     } else if (AVIFILE_ReadFrame(This, pSource, lStart) == NULL)
 641       return AVIERR_BADFORMAT; /* Can't convert source to own format */
 642   } /* FIXME: something special for the other formats? */
 643
 644   /* Make sure we have enough memory for parts */
 645   if (pEdit != NULL) {
 646     DWORD nLastStream;
 647
 648     AVIFILE_FindStreamInTable(pEdit, lStart + lLength, &pStream,
 649                               &endPos, &nLastStream, TRUE);
 650     AVIFILE_FindStreamInTable(pEdit, lStart, &pStream,
 651                               &startPos, &streamNr, FALSE);
 652     if (nLastStream == streamNr)
 653       nLastStream++;
 654
 655     nStreams = nLastStream - streamNr;
 656   } else
 657     nStreams = 1;
 658   if (This->nStreams + nStreams + 1 > This->nTableSize) {
 659     n = This->nStreams + nStreams + 33;
 660
 661     This->pStreams = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, This->pStreams, n * sizeof(EditStreamTable));
 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   IAVIEditStreamImpl *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 = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, pEdit->pStreams,
 751                                   This->nStreams * sizeof(EditStreamTable));
 752     if (pEdit->pStreams == NULL)
 753       return AVIERR_MEMORY;
 754     pEdit->nTableSize = This->nStreams;
 755   }
 756   pEdit->nStreams = This->nStreams;
 757   memcpy(pEdit->pStreams, This->pStreams,
 758          This->nStreams * sizeof(EditStreamTable));
 759   memcpy(&pEdit->sInfo,&This->sInfo,sizeof(This->sInfo));
 760   for (i = 0; i < This->nStreams; i++) {
 761     if (pEdit->pStreams[i].pStream != NULL)
 762       IAVIStream_AddRef(pEdit->pStreams[i].pStream);
 763   }
 764
 765   *ppResult = (PAVISTREAM)&pEdit->iAVIStream;
 766
 767   return AVIERR_OK;
 768 }
 769
 770 static HRESULT WINAPI IAVIEditStream_fnSetInfo(IAVIEditStream*iface,
 771                                                LPAVISTREAMINFOW asi,LONG size)
 772 {
 773   IAVIEditStreamImpl *This = (IAVIEditStreamImpl *)iface;
 774
 775   TRACE("(%p,%p,%d)\n",iface,asi,size);
 776
 777   /* check parameters */
 778   if (asi == NULL)
 779     return AVIERR_BADPARAM;
 780   if (size != sizeof(AVISTREAMINFOW))
 781     return AVIERR_BADSIZE;
 782   if (asi->dwScale == 0 || asi->dwRate == 0 || (LONG)asi->dwQuality < -1 ||
 783       asi->dwQuality > ICQUALITY_HIGH)
 784     return AVIERR_ERROR;
 785
 786   This->sInfo.wLanguage = asi->wLanguage;
 787   This->sInfo.wPriority = asi->wPriority;
 788   This->sInfo.dwStart   = asi->dwStart;
 789   if (asi->dwRate != 0)
 790     This->sInfo.dwRate  = asi->dwRate;
 791   if (asi->dwScale != 0)
 792     This->sInfo.dwScale = asi->dwScale;
 793   if (asi->dwQuality <= ICQUALITY_HIGH)
 794     This->sInfo.dwQuality = ICQUALITY_HIGH;
 795   CopyRect(&This->sInfo.rcFrame, &asi->rcFrame);
 796   memcpy(This->sInfo.szName, asi->szName, sizeof(asi->szName));
 797   This->sInfo.dwEditCount++;
 798
 799   return AVIERR_OK;
 800 }
 801
 802 static HRESULT WINAPI IEditAVIStream_fnQueryInterface(IAVIStream*iface,
 803                                                       REFIID refiid,LPVOID*obj)
 804 {
 805   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
 806
 807   assert(This->pae != NULL);
 808
 809   return IAVIEditStream_QueryInterface((IAVIEditStream*)This->pae,refiid,obj);
 810 }
 811
 812 static ULONG   WINAPI IEditAVIStream_fnAddRef(IAVIStream*iface)
 813 {
 814   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
 815
 816   assert(This->pae != NULL);
 817
 818   return IAVIEditStream_AddRef((IAVIEditStream*)This->pae);
 819 }
 820
 821 static ULONG   WINAPI IEditAVIStream_fnRelease(IAVIStream*iface)
 822 {
 823   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
 824
 825   assert(This->pae != NULL);
 826
 827   return IAVIEditStream_Release((IAVIEditStream*)This->pae);
 828 }
 829
 830 static HRESULT WINAPI IEditAVIStream_fnCreate(IAVIStream*iface,
 831                                               LPARAM lParam1,LPARAM lParam2)
 832 {
 833   IAVIEditStreamImpl *This = ((IEditAVIStreamImpl*)iface)->pae;
 834
 835   if (lParam2 != 0)
 836     return AVIERR_ERROR;
 837
 838   if (This->pStreams == NULL) {
 839     This->pStreams = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, 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   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
 860
 861   TRACE("(%p,%p,%d)\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,%d,0x%08X)\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) != S_OK)
 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,%d,%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 = 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,%d,%p,%d)\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,%d,%d,%p,%d,%p,%p) -- 0x%08X\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         buffer = ((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,%d,%d,%p,%d,0x%08X,%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   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
1080
1081   TRACE("(%p,%d,%d)\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%08X,%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%08X,%p,%d)\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   IEditAVIStreamImpl *This = (IEditAVIStreamImpl *)iface;
1122
1123   TRACE("(%p,%p,%d)\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   IEditStreamInternalImpl *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   IEditStreamInternalImpl *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   IEditStreamInternalImpl *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   IEditStreamInternalImpl *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 }