dlls/avifil32/icmstream.c

   1 /*
   2  * Copyright 2002 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 #define COM_NO_WINDOWS_H
  20 #include <assert.h>
  21 #include <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "wingdi.h"
  26 #include "winuser.h"
  27 #include "winnls.h"
  28 #include "winerror.h"
  29 #include "mmsystem.h"
  30 #include "vfw.h"
  31 #include "msacm.h"
  32
  33 #include "avifile_private.h"
  34
  35 #include "wine/debug.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(avifile);
  38
  39 #define MAX_FRAMESIZE       (16 * 1024 * 1024)
  40 #define MAX_FRAMESIZE_DIFF  512
  41
  42 /***********************************************************************/
  43
  44 static HRESULT WINAPI ICMStream_fnQueryInterface(IAVIStream*iface,REFIID refiid,LPVOID *obj);
  45 static ULONG   WINAPI ICMStream_fnAddRef(IAVIStream*iface);
  46 static ULONG   WINAPI ICMStream_fnRelease(IAVIStream* iface);
  47 static HRESULT WINAPI ICMStream_fnCreate(IAVIStream*iface,LPARAM lParam1,LPARAM lParam2);
  48 static HRESULT WINAPI ICMStream_fnInfo(IAVIStream*iface,AVISTREAMINFOW *psi,LONG size);
  49 static LONG    WINAPI ICMStream_fnFindSample(IAVIStream*iface,LONG pos,LONG flags);
  50 static HRESULT WINAPI ICMStream_fnReadFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG *formatsize);
  51 static HRESULT WINAPI ICMStream_fnSetFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG formatsize);
  52 static HRESULT WINAPI ICMStream_fnRead(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,LONG *bytesread,LONG *samplesread);
  53 static HRESULT WINAPI ICMStream_fnWrite(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,DWORD flags,LONG *sampwritten,LONG *byteswritten);
  54 static HRESULT WINAPI ICMStream_fnDelete(IAVIStream*iface,LONG start,LONG samples);
  55 static HRESULT WINAPI ICMStream_fnReadData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG *lpread);
  56 static HRESULT WINAPI ICMStream_fnWriteData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG size);
  57 static HRESULT WINAPI ICMStream_fnSetInfo(IAVIStream*iface,AVISTREAMINFOW*info,LONG infolen);
  58
  59 static const struct IAVIStreamVtbl iicmst = {
  60   ICMStream_fnQueryInterface,
  61   ICMStream_fnAddRef,
  62   ICMStream_fnRelease,
  63   ICMStream_fnCreate,
  64   ICMStream_fnInfo,
  65   ICMStream_fnFindSample,
  66   ICMStream_fnReadFormat,
  67   ICMStream_fnSetFormat,
  68   ICMStream_fnRead,
  69   ICMStream_fnWrite,
  70   ICMStream_fnDelete,
  71   ICMStream_fnReadData,
  72   ICMStream_fnWriteData,
  73   ICMStream_fnSetInfo
  74 };
  75
  76 typedef struct _IAVIStreamImpl {
  77   /* IUnknown stuff */
  78   const IAVIStreamVtbl *lpVtbl;
  79   LONG               ref;
  80
  81   /* IAVIStream stuff */
  82   PAVISTREAM         pStream;
  83   AVISTREAMINFOW     sInfo;
  84
  85   PGETFRAME          pg;
  86   HIC                hic;
  87   DWORD              dwICMFlags;
  88
  89   LONG               lCurrent;
  90   LONG               lLastKey;
  91   LONG               lKeyFrameEvery;
  92   DWORD              dwLastQuality;
  93   DWORD              dwBytesPerFrame;
  94   DWORD              dwUnusedBytes;
  95
  96   LPBITMAPINFOHEADER lpbiCur;  /* current frame */
  97   LPVOID             lpCur;
  98   LPBITMAPINFOHEADER lpbiPrev; /* previous frame */
  99   LPVOID             lpPrev;
 100
 101   LPBITMAPINFOHEADER lpbiOutput; /* output format of codec */
 102   LONG               cbOutput;
 103   LPBITMAPINFOHEADER lpbiInput;  /* input format for codec */
 104   LONG               cbInput;
 105 } IAVIStreamImpl;
 106
 107 /***********************************************************************/
 108
 109 static HRESULT AVIFILE_EncodeFrame(IAVIStreamImpl *This,
 110                                    LPBITMAPINFOHEADER lpbi, LPVOID lpBits);
 111 static HRESULT AVIFILE_OpenGetFrame(IAVIStreamImpl *This);
 112
 113 static inline void AVIFILE_Reset(IAVIStreamImpl *This)
 114 {
 115   This->lCurrent      = -1;
 116   This->lLastKey      = 0;
 117   This->dwLastQuality = ICQUALITY_HIGH;
 118   This->dwUnusedBytes = 0;
 119 }
 120
 121 HRESULT AVIFILE_CreateICMStream(REFIID riid, LPVOID *ppv)
 122 {
 123   IAVIStreamImpl *pstream;
 124   HRESULT         hr;
 125
 126   assert(riid != NULL && ppv != NULL);
 127
 128   *ppv = NULL;
 129
 130   pstream = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IAVIStreamImpl));
 131   if (pstream == NULL)
 132     return AVIERR_MEMORY;
 133
 134   pstream->lpVtbl  = &iicmst;
 135   AVIFILE_Reset(pstream);
 136
 137   hr = IAVIStream_QueryInterface((IAVIStream*)pstream, riid, ppv);
 138   if (FAILED(hr))
 139     HeapFree(GetProcessHeap(), 0, pstream);
 140
 141   return hr;
 142 }
 143
 144 static HRESULT WINAPI ICMStream_fnQueryInterface(IAVIStream *iface,
 145                                                   REFIID refiid, LPVOID *obj)
 146 {
 147   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 148
 149   TRACE("(%p,%s,%p)\n", iface, debugstr_guid(refiid), obj);
 150
 151   if (IsEqualGUID(&IID_IUnknown, refiid) ||
 152       IsEqualGUID(&IID_IAVIStream, refiid)) {
 153     *obj = This;
 154     IAVIStream_AddRef(iface);
 155
 156     return S_OK;
 157   }
 158
 159   return OLE_E_ENUM_NOMORE;
 160 }
 161
 162 static ULONG WINAPI ICMStream_fnAddRef(IAVIStream *iface)
 163 {
 164   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 165   ULONG ref = InterlockedIncrement(&This->ref);
 166
 167   TRACE("(%p) -> %ld\n", iface, ref);
 168
 169   /* also add reference to the nested stream */
 170   if (This->pStream != NULL)
 171     IAVIStream_AddRef(This->pStream);
 172
 173   return ref;
 174 }
 175
 176 static ULONG WINAPI ICMStream_fnRelease(IAVIStream* iface)
 177 {
 178   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 179   ULONG ref = InterlockedDecrement(&This->ref);
 180
 181   TRACE("(%p) -> %ld\n", iface, ref);
 182
 183   if (ref == 0) {
 184     /* destruct */
 185     if (This->pg != NULL) {
 186       AVIStreamGetFrameClose(This->pg);
 187       This->pg = NULL;
 188     }
 189     if (This->pStream != NULL) {
 190       IAVIStream_Release(This->pStream);
 191       This->pStream = NULL;
 192     }
 193     if (This->hic != NULL) {
 194       if (This->lpbiPrev != NULL) {
 195         ICDecompressEnd(This->hic);
 196         HeapFree(GetProcessHeap(), 0, This->lpbiPrev);
 197         This->lpbiPrev = NULL;
 198         This->lpPrev   = NULL;
 199       }
 200       ICCompressEnd(This->hic);
 201       This->hic = NULL;
 202     }
 203     if (This->lpbiCur != NULL) {
 204       HeapFree(GetProcessHeap(), 0, This->lpbiCur);
 205       This->lpbiCur = NULL;
 206       This->lpCur   = NULL;
 207     }
 208     if (This->lpbiOutput != NULL) {
 209       HeapFree(GetProcessHeap(), 0, This->lpbiOutput);
 210       This->lpbiOutput = NULL;
 211       This->cbOutput   = 0;
 212     }
 213     if (This->lpbiInput != NULL) {
 214       HeapFree(GetProcessHeap(), 0, This->lpbiInput);
 215       This->lpbiInput = NULL;
 216       This->cbInput   = 0;
 217     }
 218
 219     HeapFree(GetProcessHeap(), 0, This);
 220
 221     return 0;
 222   }
 223
 224   /* also release reference to the nested stream */
 225   if (This->pStream != NULL)
 226     IAVIStream_Release(This->pStream);
 227
 228   return ref;
 229 }
 230
 231 /* lParam1: PAVISTREAM
 232  * lParam2: LPAVICOMPRESSOPTIONS
 233  */
 234 static HRESULT WINAPI ICMStream_fnCreate(IAVIStream *iface, LPARAM lParam1,
 235                                           LPARAM lParam2)
 236 {
 237   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 238
 239   ICINFO               icinfo;
 240   ICCOMPRESSFRAMES     icFrames;
 241   LPAVICOMPRESSOPTIONS pco = (LPAVICOMPRESSOPTIONS)lParam2;
 242
 243   TRACE("(%p,0x%08lX,0x%08lX)\n", iface, lParam1, lParam2);
 244
 245   /* check parameter */
 246   if ((LPVOID)lParam1 == NULL)
 247     return AVIERR_BADPARAM;
 248
 249   /* get infos from stream */
 250   IAVIStream_Info((PAVISTREAM)lParam1, &This->sInfo, sizeof(This->sInfo));
 251   if (This->sInfo.fccType != streamtypeVIDEO)
 252     return AVIERR_ERROR; /* error in registry or AVIMakeCompressedStream */
 253
 254   /* add reference to the stream */
 255   This->pStream = (PAVISTREAM)lParam1;
 256   IAVIStream_AddRef(This->pStream);
 257
 258   AVIFILE_Reset(This);
 259
 260   if (pco != NULL && pco->fccHandler != comptypeDIB) {
 261     /* we should compress */
 262     This->sInfo.fccHandler = pco->fccHandler;
 263
 264     This->hic = ICOpen(ICTYPE_VIDEO, pco->fccHandler, ICMODE_COMPRESS);
 265     if (This->hic == NULL)
 266       return AVIERR_NOCOMPRESSOR;
 267
 268     /* restore saved state of codec */
 269     if (pco->cbParms > 0 && pco->lpParms != NULL) {
 270       ICSetState(This->hic, pco->lpParms, pco->cbParms);
 271     }
 272
 273     /* set quality -- resolve default quality */
 274     This->sInfo.dwQuality = pco->dwQuality;
 275     if (pco->dwQuality == ICQUALITY_DEFAULT)
 276       This->sInfo.dwQuality = ICGetDefaultQuality(This->hic);
 277
 278     /* get capabilities of codec */
 279     ICGetInfo(This->hic, &icinfo, sizeof(icinfo));
 280     This->dwICMFlags = icinfo.dwFlags;
 281
 282     /* use keyframes? */
 283     if ((pco->dwFlags & AVICOMPRESSF_KEYFRAMES) &&
 284         (icinfo.dwFlags & (VIDCF_TEMPORAL|VIDCF_FASTTEMPORALC))) {
 285       This->lKeyFrameEvery = pco->dwKeyFrameEvery;
 286     } else
 287       This->lKeyFrameEvery = 1;
 288
 289     /* use datarate? */
 290     if ((pco->dwFlags & AVICOMPRESSF_DATARATE)) {
 291       /* Do we have a chance to reduce size to desired one? */
 292       if ((icinfo.dwFlags & (VIDCF_CRUNCH|VIDCF_QUALITY)) == 0)
 293         return AVIERR_NOCOMPRESSOR;
 294
 295       assert(This->sInfo.dwRate != 0);
 296
 297       This->dwBytesPerFrame = MulDiv(pco->dwBytesPerSecond,
 298                                      This->sInfo.dwScale, This->sInfo.dwRate);
 299     } else {
 300       pco->dwBytesPerSecond = 0;
 301       This->dwBytesPerFrame = 0;
 302     }
 303
 304     if (icinfo.dwFlags & VIDCF_COMPRESSFRAMES) {
 305       memset(&icFrames, 0, sizeof(icFrames));
 306       icFrames.lpbiOutput  = This->lpbiOutput;
 307       icFrames.lpbiInput   = This->lpbiInput;
 308       icFrames.lFrameCount = This->sInfo.dwLength;
 309       icFrames.lQuality    = This->sInfo.dwQuality;
 310       icFrames.lDataRate   = pco->dwBytesPerSecond;
 311       icFrames.lKeyRate    = This->lKeyFrameEvery;
 312       icFrames.dwRate      = This->sInfo.dwRate;
 313       icFrames.dwScale     = This->sInfo.dwScale;
 314       ICSendMessage(This->hic, ICM_COMPRESS_FRAMES_INFO,
 315                     (LPARAM)&icFrames, (LPARAM)sizeof(icFrames));
 316     }
 317   } else
 318     This->sInfo.fccHandler = comptypeDIB;
 319
 320   return AVIERR_OK;
 321 }
 322
 323 static HRESULT WINAPI ICMStream_fnInfo(IAVIStream *iface,LPAVISTREAMINFOW psi,
 324                                         LONG size)
 325 {
 326   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 327
 328   TRACE("(%p,%p,%ld)\n", iface, psi, size);
 329
 330   if (psi == NULL)
 331     return AVIERR_BADPARAM;
 332   if (size < 0)
 333     return AVIERR_BADSIZE;
 334
 335   memcpy(psi, &This->sInfo, min((DWORD)size, sizeof(This->sInfo)));
 336
 337   if ((DWORD)size < sizeof(This->sInfo))
 338     return AVIERR_BUFFERTOOSMALL;
 339   return AVIERR_OK;
 340 }
 341
 342 static LONG WINAPI ICMStream_fnFindSample(IAVIStream *iface, LONG pos,
 343                                            LONG flags)
 344 {
 345   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 346
 347   TRACE("(%p,%ld,0x%08lX)\n",iface,pos,flags);
 348
 349   if (flags & FIND_FROM_START) {
 350     pos = This->sInfo.dwStart;
 351     flags &= ~(FIND_FROM_START|FIND_PREV);
 352     flags |= FIND_NEXT;
 353   }
 354
 355   if (flags & FIND_RET)
 356     WARN(": FIND_RET flags will be ignored!\n");
 357
 358   if (flags & FIND_KEY) {
 359     if (This->hic == NULL)
 360       return pos; /* we decompress so every frame is a keyframe */
 361
 362     if (flags & FIND_PREV) {
 363       /* need to read old or new frames? */
 364       if (This->lLastKey <= pos || pos < This->lCurrent)
 365         IAVIStream_Read(iface, pos, 1, NULL, 0, NULL, NULL);
 366
 367       return This->lLastKey;
 368     }
 369   } else if (flags & FIND_ANY) {
 370     return pos; /* We really don't know, reread is to expensive, so guess. */
 371   } else if (flags & FIND_FORMAT) {
 372     if (flags & FIND_PREV)
 373       return 0;
 374   }
 375
 376   return -1;
 377 }
 378
 379 static HRESULT WINAPI ICMStream_fnReadFormat(IAVIStream *iface, LONG pos,
 380                                               LPVOID format, LONG *formatsize)
 381 {
 382   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 383
 384   LPBITMAPINFOHEADER lpbi;
 385   HRESULT            hr;
 386
 387   TRACE("(%p,%ld,%p,%p)\n", iface, pos, format, formatsize);
 388
 389   if (formatsize == NULL)
 390     return AVIERR_BADPARAM;
 391
 392   if (This->pg == NULL) {
 393     hr = AVIFILE_OpenGetFrame(This);
 394
 395     if (FAILED(hr))
 396       return hr;
 397   }
 398
 399   lpbi = (LPBITMAPINFOHEADER)AVIStreamGetFrame(This->pg, pos);
 400   if (lpbi == NULL)
 401     return AVIERR_MEMORY;
 402
 403   if (This->hic == NULL) {
 404     LONG size = lpbi->biSize + lpbi->biClrUsed * sizeof(RGBQUAD);
 405
 406     if (size > 0) {
 407       if (This->sInfo.dwSuggestedBufferSize < lpbi->biSizeImage)
 408         This->sInfo.dwSuggestedBufferSize = lpbi->biSizeImage;
 409
 410       This->cbOutput = size;
 411       if (format != NULL) {
 412         if (This->lpbiOutput != NULL)
 413           memcpy(format, This->lpbiOutput, min(*formatsize, This->cbOutput));
 414         else
 415           memcpy(format, lpbi, min(*formatsize, size));
 416       }
 417     }
 418   } else if (format != NULL)
 419     memcpy(format, This->lpbiOutput, min(*formatsize, This->cbOutput));
 420
 421   if (*formatsize < This->cbOutput)
 422     hr = AVIERR_BUFFERTOOSMALL;
 423   else
 424     hr = AVIERR_OK;
 425
 426   *formatsize = This->cbOutput;
 427   return hr;
 428 }
 429
 430 static HRESULT WINAPI ICMStream_fnSetFormat(IAVIStream *iface, LONG pos,
 431                                              LPVOID format, LONG formatsize)
 432 {
 433   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 434
 435   TRACE("(%p,%ld,%p,%ld)\n", iface, pos, format, formatsize);
 436
 437   /* check parameters */
 438   if (format == NULL || formatsize <= 0)
 439     return AVIERR_BADPARAM;
 440
 441   /* We can only accept RGB data for writing */
 442   if (((LPBITMAPINFOHEADER)format)->biCompression != BI_RGB) {
 443     WARN(": need RGB data as input\n");
 444     return AVIERR_UNSUPPORTED;
 445   }
 446
 447   /* Input format already known?
 448    * Changing of palette is supported, but be quiet if it's the same */
 449   if (This->lpbiInput != NULL) {
 450     if (This->cbInput != formatsize)
 451       return AVIERR_UNSUPPORTED;
 452
 453     if (memcmp(format, This->lpbiInput, formatsize) == 0)
 454       return AVIERR_OK;
 455   }
 456
 457   /* Does the nested stream support writing? */
 458   if ((This->sInfo.dwCaps & AVIFILECAPS_CANWRITE) == 0)
 459     return AVIERR_READONLY;
 460
 461   /* check if frame is already written */
 462   if (This->sInfo.dwLength + This->sInfo.dwStart > pos)
 463     return AVIERR_UNSUPPORTED;
 464
 465   /* check if we should compress */
 466   if (This->sInfo.fccHandler == 0 ||
 467       This->sInfo.fccHandler == mmioFOURCC('N','O','N','E'))
 468     This->sInfo.fccHandler = comptypeDIB;
 469
 470   /* only pass through? */
 471   if (This->sInfo.fccHandler == comptypeDIB)
 472     return IAVIStream_SetFormat(This->pStream, pos, format, formatsize);
 473
 474   /* initial format setting? */
 475   if (This->lpbiInput == NULL) {
 476     ULONG size;
 477
 478     assert(This->hic != NULL);
 479
 480     /* get memory for input format */
 481     This->lpbiInput = HeapAlloc(GetProcessHeap(), 0, formatsize);
 482     if (This->lpbiInput == NULL)
 483       return AVIERR_MEMORY;
 484     This->cbInput = formatsize;
 485     memcpy(This->lpbiInput, format, formatsize);
 486
 487     /* get output format */
 488     size = ICCompressGetFormatSize(This->hic, This->lpbiInput);
 489     if (size < sizeof(BITMAPINFOHEADER))
 490       return AVIERR_COMPRESSOR;
 491     This->lpbiOutput = HeapAlloc(GetProcessHeap(), 0, size);
 492     if (This->lpbiOutput == NULL)
 493       return AVIERR_MEMORY;
 494     This->cbOutput = size;
 495     if (ICCompressGetFormat(This->hic,This->lpbiInput,This->lpbiOutput) < S_OK)
 496       return AVIERR_COMPRESSOR;
 497
 498     /* update AVISTREAMINFO structure */
 499     This->sInfo.rcFrame.right  =
 500       This->sInfo.rcFrame.left + This->lpbiOutput->biWidth;
 501     This->sInfo.rcFrame.bottom =
 502       This->sInfo.rcFrame.top  + This->lpbiOutput->biHeight;
 503
 504     /* prepare codec for compression */
 505     if (ICCompressBegin(This->hic, This->lpbiInput, This->lpbiOutput) != S_OK)
 506       return AVIERR_COMPRESSOR;
 507
 508     /* allocate memory for compressed frame */
 509     size = ICCompressGetSize(This->hic, This->lpbiInput, This->lpbiOutput);
 510     This->lpbiCur = HeapAlloc(GetProcessHeap(), 0, This->cbOutput + size);
 511     if (This->lpbiCur == NULL)
 512       return AVIERR_MEMORY;
 513     memcpy(This->lpbiCur, This->lpbiOutput, This->cbOutput);
 514     This->lpCur = DIBPTR(This->lpbiCur);
 515
 516     /* allocate memory for last frame if needed */
 517     if (This->lKeyFrameEvery != 1 &&
 518         (This->dwICMFlags & VIDCF_FASTTEMPORALC) == 0) {
 519       size = ICDecompressGetFormatSize(This->hic, This->lpbiOutput);
 520       This->lpbiPrev = HeapAlloc(GetProcessHeap(), 0, size);
 521       if (This->lpbiPrev == NULL)
 522         return AVIERR_MEMORY;
 523       if (ICDecompressGetFormat(This->hic, This->lpbiOutput, This->lpbiPrev) < S_OK)
 524         return AVIERR_COMPRESSOR;
 525
 526       if (This->lpbiPrev->biSizeImage == 0) {
 527         This->lpbiPrev->biSizeImage =
 528           DIBWIDTHBYTES(*This->lpbiPrev) * This->lpbiPrev->biHeight;
 529       }
 530
 531       /* get memory for format and picture */
 532       size += This->lpbiPrev->biSizeImage;
 533       This->lpbiPrev = HeapReAlloc(GetProcessHeap(), 0, This->lpbiPrev, size);
 534       if (This->lpbiPrev == NULL)
 535         return AVIERR_MEMORY;
 536       This->lpPrev = DIBPTR(This->lpbiPrev);
 537
 538       /* prepare codec also for decompression */
 539       if (ICDecompressBegin(This->hic,This->lpbiOutput,This->lpbiPrev) != S_OK)
 540         return AVIERR_COMPRESSOR;
 541     }
 542   } else {
 543     /* format change -- check that's only the palette */
 544     LPBITMAPINFOHEADER lpbi = (LPBITMAPINFOHEADER)format;
 545
 546     if (lpbi->biSize != This->lpbiInput->biSize ||
 547         lpbi->biWidth != This->lpbiInput->biWidth ||
 548         lpbi->biHeight != This->lpbiInput->biHeight ||
 549         lpbi->biBitCount != This->lpbiInput->biBitCount ||
 550         lpbi->biPlanes != This->lpbiInput->biPlanes ||
 551         lpbi->biCompression != This->lpbiInput->biCompression ||
 552         lpbi->biClrUsed != This->lpbiInput->biClrUsed)
 553       return AVIERR_UNSUPPORTED;
 554
 555     /* get new output format */
 556     if (ICCompressGetFormat(This->hic, lpbi, This->lpbiOutput) < S_OK)
 557       return AVIERR_BADFORMAT;
 558
 559     /* restart compression */
 560     ICCompressEnd(This->hic);
 561     if (ICCompressBegin(This->hic, lpbi, This->lpbiOutput) != S_OK)
 562       return AVIERR_COMPRESSOR;
 563
 564     /* check if we need to restart decompresion also */
 565     if (This->lKeyFrameEvery != 1 &&
 566         (This->dwICMFlags & VIDCF_FASTTEMPORALC) == 0) {
 567       ICDecompressEnd(This->hic);
 568       if (ICDecompressGetFormat(This->hic,This->lpbiOutput,This->lpbiPrev) < S_OK)
 569         return AVIERR_COMPRESSOR;
 570       if (ICDecompressBegin(This->hic,This->lpbiOutput,This->lpbiPrev) != S_OK)
 571         return AVIERR_COMPRESSOR;
 572     }
 573   }
 574
 575   /* tell nested stream the new format */
 576   return IAVIStream_SetFormat(This->pStream, pos,
 577                               This->lpbiOutput, This->cbOutput);
 578 }
 579
 580 static HRESULT WINAPI ICMStream_fnRead(IAVIStream *iface, LONG start,
 581                                         LONG samples, LPVOID buffer,
 582                                         LONG buffersize, LPLONG bytesread,
 583                                         LPLONG samplesread)
 584 {
 585   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 586
 587   LPBITMAPINFOHEADER lpbi;
 588
 589   TRACE("(%p,%ld,%ld,%p,%ld,%p,%p)\n", iface, start, samples, buffer,
 590         buffersize, bytesread, samplesread);
 591
 592   /* clear return parameters if given */
 593   if (bytesread != NULL)
 594     *bytesread = 0;
 595   if (samplesread != NULL)
 596     *samplesread = 0;
 597
 598   if (samples == 0)
 599     return AVIERR_OK;
 600
 601   /* check parameters */
 602   if (samples != 1 && (bytesread == NULL && samplesread == NULL))
 603     return AVIERR_BADPARAM;
 604   if (samples == -1) /* read as much as we could */
 605     samples = 1;
 606
 607   if (This->pg == NULL) {
 608     HRESULT hr = AVIFILE_OpenGetFrame(This);
 609
 610     if (FAILED(hr))
 611       return hr;
 612   }
 613
 614   /* compress or decompress? */
 615   if (This->hic == NULL) {
 616     /* decompress */
 617     lpbi = (LPBITMAPINFOHEADER)AVIStreamGetFrame(This->pg, start);
 618     if (lpbi == NULL)
 619       return AVIERR_MEMORY;
 620
 621     if (buffer != NULL && buffersize > 0) {
 622       /* check buffersize */
 623       if (buffersize < lpbi->biSizeImage)
 624         return AVIERR_BUFFERTOOSMALL;
 625
 626       memcpy(buffer, DIBPTR(lpbi), lpbi->biSizeImage);
 627     }
 628
 629     /* fill out return parameters if given */
 630     if (bytesread != NULL)
 631       *bytesread = lpbi->biSizeImage;
 632   } else {
 633     /* compress */
 634     if (This->lCurrent > start)
 635       AVIFILE_Reset(This);
 636
 637     while (start > This->lCurrent) {
 638       HRESULT hr;
 639
 640       lpbi = (LPBITMAPINFOHEADER)AVIStreamGetFrame(This->pg, ++This->lCurrent);
 641       if (lpbi == NULL) {
 642         AVIFILE_Reset(This);
 643         return AVIERR_MEMORY;
 644       }
 645
 646       hr = AVIFILE_EncodeFrame(This, lpbi, DIBPTR(lpbi));
 647       if (FAILED(hr)) {
 648         AVIFILE_Reset(This);
 649         return hr;
 650       }
 651     }
 652
 653     if (buffer != NULL && buffersize > 0) {
 654       /* check buffersize */
 655       if (This->lpbiCur->biSizeImage > buffersize)
 656         return AVIERR_BUFFERTOOSMALL;
 657
 658       memcpy(buffer, This->lpCur, This->lpbiCur->biSizeImage);
 659     }
 660
 661     /* fill out return parameters if given */
 662     if (bytesread != NULL)
 663       *bytesread = This->lpbiCur->biSizeImage;
 664   }
 665
 666   /* fill out return parameters if given */
 667   if (samplesread != NULL)
 668     *samplesread = 1;
 669
 670   return AVIERR_OK;
 671 }
 672
 673 static HRESULT WINAPI ICMStream_fnWrite(IAVIStream *iface, LONG start,
 674                                          LONG samples, LPVOID buffer,
 675                                          LONG buffersize, DWORD flags,
 676                                          LPLONG sampwritten,
 677                                          LPLONG byteswritten)
 678 {
 679   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 680
 681   HRESULT hr;
 682
 683   TRACE("(%p,%ld,%ld,%p,%ld,0x%08lX,%p,%p)\n", iface, start, samples,
 684         buffer, buffersize, flags, sampwritten, byteswritten);
 685
 686   /* clear return parameters if given */
 687   if (sampwritten != NULL)
 688     *sampwritten = 0;
 689   if (byteswritten != NULL)
 690     *byteswritten = 0;
 691
 692   /* check parameters */
 693   if (buffer == NULL && (buffersize > 0 || samples > 0))
 694     return AVIERR_BADPARAM;
 695
 696   if (This->sInfo.fccHandler == comptypeDIB) {
 697     /* only pass through */
 698     flags |= AVIIF_KEYFRAME;
 699
 700     return IAVIStream_Write(This->pStream, start, samples, buffer, buffersize,
 701                             flags, sampwritten, byteswritten);
 702   } else {
 703     /* compress data before writing to pStream */
 704     if (samples != 1 && (sampwritten == NULL && byteswritten == NULL))
 705       return AVIERR_UNSUPPORTED;
 706
 707     This->lCurrent = start;
 708     hr = AVIFILE_EncodeFrame(This, This->lpbiInput, buffer);
 709     if (FAILED(hr))
 710       return hr;
 711
 712     if (This->lLastKey == start)
 713       flags |= AVIIF_KEYFRAME;
 714
 715     return IAVIStream_Write(This->pStream, start, samples, This->lpCur,
 716                             This->lpbiCur->biSizeImage, flags, byteswritten,
 717                             sampwritten);
 718   }
 719 }
 720
 721 static HRESULT WINAPI ICMStream_fnDelete(IAVIStream *iface, LONG start,
 722                                           LONG samples)
 723 {
 724   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 725
 726   TRACE("(%p,%ld,%ld)\n", iface, start, samples);
 727
 728   return IAVIStream_Delete(This->pStream, start, samples);
 729 }
 730
 731 static HRESULT WINAPI ICMStream_fnReadData(IAVIStream *iface, DWORD fcc,
 732                                             LPVOID lp, LPLONG lpread)
 733 {
 734   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 735
 736   TRACE("(%p,0x%08lX,%p,%p)\n", iface, fcc, lp, lpread);
 737
 738   assert(This->pStream != NULL);
 739
 740   return IAVIStream_ReadData(This->pStream, fcc, lp, lpread);
 741 }
 742
 743 static HRESULT WINAPI ICMStream_fnWriteData(IAVIStream *iface, DWORD fcc,
 744                                              LPVOID lp, LONG size)
 745 {
 746   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 747
 748   TRACE("(%p,0x%08lx,%p,%ld)\n", iface, fcc, lp, size);
 749
 750   assert(This->pStream != NULL);
 751
 752   return IAVIStream_WriteData(This->pStream, fcc, lp, size);
 753 }
 754
 755 static HRESULT WINAPI ICMStream_fnSetInfo(IAVIStream *iface,
 756                                            LPAVISTREAMINFOW info, LONG infolen)
 757 {
 758   FIXME("(%p,%p,%ld): stub\n", iface, info, infolen);
 759
 760   return E_FAIL;
 761 }
 762
 763 /***********************************************************************/
 764
 765 static HRESULT AVIFILE_EncodeFrame(IAVIStreamImpl *This,
 766                                    LPBITMAPINFOHEADER lpbi, LPVOID lpBits)
 767 {
 768   DWORD dwMinQual, dwMaxQual, dwCurQual;
 769   DWORD dwRequest;
 770   DWORD icmFlags = 0;
 771   DWORD idxFlags = 0;
 772   BOOL  bDecreasedQual = FALSE;
 773   BOOL  doSizeCheck;
 774   BOOL  noPrev;
 775
 776   /* make lKeyFrameEvery and at start a keyframe */
 777   if ((This->lKeyFrameEvery != 0 &&
 778        (This->lCurrent - This->lLastKey) >= This->lKeyFrameEvery) ||
 779       This->lCurrent == This->sInfo.dwStart) {
 780     idxFlags = AVIIF_KEYFRAME;
 781     icmFlags = ICCOMPRESS_KEYFRAME;
 782   }
 783
 784   if (This->lKeyFrameEvery != 0) {
 785     if (This->lCurrent == This->sInfo.dwStart) {
 786       if (idxFlags & AVIIF_KEYFRAME) {
 787         /* for keyframes allow to consume all unused bytes */
 788         dwRequest = This->dwBytesPerFrame + This->dwUnusedBytes;
 789         This->dwUnusedBytes = 0;
 790       } else {
 791         /* for non-keyframes only allow something of the unused bytes to be consumed */
 792         DWORD tmp1 = 0;
 793         DWORD tmp2;
 794
 795         if (This->dwBytesPerFrame >= This->dwUnusedBytes)
 796           tmp1 = This->dwBytesPerFrame / This->lKeyFrameEvery;
 797         tmp2 = (This->dwUnusedBytes + tmp1) / This->lKeyFrameEvery;
 798
 799         dwRequest = This->dwBytesPerFrame - tmp1 + tmp2;
 800         This->dwUnusedBytes -= tmp2;
 801       }
 802     } else
 803       dwRequest = MAX_FRAMESIZE;
 804   } else {
 805     /* only one keyframe at start desired */
 806     if (This->lCurrent == This->sInfo.dwStart) {
 807       dwRequest = This->dwBytesPerFrame + This->dwUnusedBytes;
 808       This->dwUnusedBytes = 0;
 809     } else
 810       dwRequest = MAX_FRAMESIZE;
 811   }
 812
 813   /* must we check for framesize to gain requested
 814    * datarate or could we trust codec? */
 815   doSizeCheck = (dwRequest != 0 && ((This->dwICMFlags & (VIDCF_CRUNCH|VIDCF_QUALITY)) == 0));
 816
 817   dwMaxQual = dwCurQual = This->sInfo.dwQuality;
 818   dwMinQual = ICQUALITY_LOW;
 819
 820   noPrev = TRUE;
 821   if ((icmFlags & ICCOMPRESS_KEYFRAME) == 0 &&
 822       (This->dwICMFlags & VIDCF_FASTTEMPORALC) == 0)
 823     noPrev = FALSE;
 824
 825   do {
 826     DWORD   idxCkid = 0;
 827     HRESULT hr;
 828
 829     hr = ICCompress(This->hic,icmFlags,This->lpbiCur,This->lpCur,lpbi,lpBits,
 830                     &idxCkid, &idxFlags, This->lCurrent, dwRequest, dwCurQual,
 831                     noPrev ? NULL:This->lpbiPrev, noPrev ? NULL:This->lpPrev);
 832     if (hr == ICERR_NEWPALETTE) {
 833       FIXME(": codec has changed palette -- unhandled!\n");
 834     } else if (hr != ICERR_OK)
 835       return AVIERR_COMPRESSOR;
 836
 837     /* need to check for framesize */
 838     if (! doSizeCheck)
 839       break;
 840
 841     if (dwRequest >= This->lpbiCur->biSizeImage) {
 842       /* frame is smaller -- try to maximize quality */
 843       if (dwMaxQual - dwCurQual > 10) {
 844         DWORD tmp = dwRequest / 8;
 845
 846         if (tmp < MAX_FRAMESIZE_DIFF)
 847           tmp = MAX_FRAMESIZE_DIFF;
 848
 849         if (tmp < dwRequest - This->lpbiCur->biSizeImage && bDecreasedQual) {
 850           tmp = dwCurQual;
 851           dwCurQual = (dwMinQual + dwMaxQual) / 2;
 852           dwMinQual = tmp;
 853           continue;
 854         }
 855       } else
 856         break;
 857     } else if (dwMaxQual - dwMinQual <= 1) {
 858       break;
 859     } else {
 860       dwMaxQual = dwCurQual;
 861
 862       if (bDecreasedQual || dwCurQual == This->dwLastQuality)
 863         dwCurQual = (dwMinQual + dwMaxQual) / 2;
 864       else
 865         FIXME(": no new quality computed min=%lu cur=%lu max=%lu last=%lu\n",
 866               dwMinQual, dwCurQual, dwMaxQual, This->dwLastQuality);
 867
 868       bDecreasedQual = TRUE;
 869     }
 870   } while (TRUE);
 871
 872   /* remember some values */
 873   This->dwLastQuality = dwCurQual;
 874   This->dwUnusedBytes = dwRequest - This->lpbiCur->biSizeImage;
 875   if (icmFlags & ICCOMPRESS_KEYFRAME)
 876     This->lLastKey = This->lCurrent;
 877
 878   /* Does we manage previous frame? */
 879   if (This->lpPrev != NULL && This->lKeyFrameEvery != 1)
 880     ICDecompress(This->hic, 0, This->lpbiCur, This->lpCur,
 881                  This->lpbiPrev, This->lpPrev);
 882
 883   return AVIERR_OK;
 884 }
 885
 886 static HRESULT AVIFILE_OpenGetFrame(IAVIStreamImpl *This)
 887 {
 888   LPBITMAPINFOHEADER lpbi;
 889   DWORD              size;
 890
 891   /* pre-conditions */
 892   assert(This != NULL);
 893   assert(This->pStream != NULL);
 894   assert(This->pg == NULL);
 895
 896   This->pg = AVIStreamGetFrameOpen(This->pStream, NULL);
 897   if (This->pg == NULL)
 898     return AVIERR_ERROR;
 899
 900   /* When we only decompress this is enough */
 901   if (This->sInfo.fccHandler == comptypeDIB)
 902     return AVIERR_OK;
 903
 904   assert(This->hic != NULL);
 905   assert(This->lpbiOutput == NULL);
 906
 907   /* get input format */
 908   lpbi = (LPBITMAPINFOHEADER)AVIStreamGetFrame(This->pg, This->sInfo.dwStart);
 909   if (lpbi == NULL)
 910     return AVIERR_MEMORY;
 911
 912   /* get memory for output format */
 913   size = ICCompressGetFormatSize(This->hic, lpbi);
 914   if ((LONG)size < (LONG)sizeof(BITMAPINFOHEADER))
 915     return AVIERR_COMPRESSOR;
 916   This->lpbiOutput = HeapAlloc(GetProcessHeap(), 0, size);
 917   if (This->lpbiOutput == NULL)
 918     return AVIERR_MEMORY;
 919   This->cbOutput = size;
 920
 921   if (ICCompressGetFormat(This->hic, lpbi, This->lpbiOutput) < S_OK)
 922     return AVIERR_BADFORMAT;
 923
 924   /* update AVISTREAMINFO structure */
 925   This->sInfo.rcFrame.right  =
 926     This->sInfo.rcFrame.left + This->lpbiOutput->biWidth;
 927   This->sInfo.rcFrame.bottom =
 928     This->sInfo.rcFrame.top  + This->lpbiOutput->biHeight;
 929   This->sInfo.dwSuggestedBufferSize =
 930     ICCompressGetSize(This->hic, lpbi, This->lpbiOutput);
 931
 932   /* prepare codec for compression */
 933   if (ICCompressBegin(This->hic, lpbi, This->lpbiOutput) != S_OK)
 934     return AVIERR_COMPRESSOR;
 935
 936   /* allocate memory for current frame */
 937   size += This->sInfo.dwSuggestedBufferSize;
 938   This->lpbiCur = HeapAlloc(GetProcessHeap(), 0, size);
 939   if (This->lpbiCur == NULL)
 940     return AVIERR_MEMORY;
 941   memcpy(This->lpbiCur, This->lpbiOutput, This->cbOutput);
 942   This->lpCur = DIBPTR(This->lpbiCur);
 943
 944   /* allocate memory for last frame if needed */
 945   if (This->lKeyFrameEvery != 1 &&
 946       (This->dwICMFlags & VIDCF_FASTTEMPORALC) == 0) {
 947     size = ICDecompressGetFormatSize(This->hic, This->lpbiOutput);
 948     This->lpbiPrev = HeapAlloc(GetProcessHeap(), 0, size);
 949     if (This->lpbiPrev == NULL)
 950       return AVIERR_MEMORY;
 951     if (ICDecompressGetFormat(This->hic, This->lpbiOutput, This->lpbiPrev) < S_OK)
 952       return AVIERR_COMPRESSOR;
 953
 954     if (This->lpbiPrev->biSizeImage == 0) {
 955       This->lpbiPrev->biSizeImage =
 956         DIBWIDTHBYTES(*This->lpbiPrev) * This->lpbiPrev->biHeight;
 957     }
 958
 959     /* get memory for format and picture */
 960     size += This->lpbiPrev->biSizeImage;
 961     This->lpbiPrev = HeapReAlloc(GetProcessHeap(), 0, This->lpbiPrev, size );
 962     if (This->lpbiPrev == NULL)
 963       return AVIERR_MEMORY;
 964     This->lpPrev = DIBPTR(This->lpbiPrev);
 965
 966     /* prepare codec also for decompression */
 967     if (ICDecompressBegin(This->hic,This->lpbiOutput,This->lpbiPrev) != S_OK)
 968       return AVIERR_COMPRESSOR;
 969   }
 970
 971   return AVIERR_OK;
 972 }