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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #define COM_NO_WINDOWS_H
  20 #include <assert.h>
  21
  22 #include "winbase.h"
  23 #include "winuser.h"
  24 #include "winnls.h"
  25 #include "winerror.h"
  26 #include "windowsx.h"
  27 #include "mmsystem.h"
  28 #include "vfw.h"
  29 #include "msacm.h"
  30
  31 #include "avifile_private.h"
  32
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(avifile);
  36
  37 #define MAX_FRAMESIZE       (16 * 1024 * 1024)
  38 #define MAX_FRAMESIZE_DIFF  512
  39
  40 /***********************************************************************/
  41
  42 static HRESULT WINAPI ICMStream_fnQueryInterface(IAVIStream*iface,REFIID refiid,LPVOID *obj);
  43 static ULONG   WINAPI ICMStream_fnAddRef(IAVIStream*iface);
  44 static ULONG   WINAPI ICMStream_fnRelease(IAVIStream* iface);
  45 static HRESULT WINAPI ICMStream_fnCreate(IAVIStream*iface,LPARAM lParam1,LPARAM lParam2);
  46 static HRESULT WINAPI ICMStream_fnInfo(IAVIStream*iface,AVISTREAMINFOW *psi,LONG size);
  47 static LONG    WINAPI ICMStream_fnFindSample(IAVIStream*iface,LONG pos,LONG flags);
  48 static HRESULT WINAPI ICMStream_fnReadFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG *formatsize);
  49 static HRESULT WINAPI ICMStream_fnSetFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG formatsize);
  50 static HRESULT WINAPI ICMStream_fnRead(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,LONG *bytesread,LONG *samplesread);
  51 static HRESULT WINAPI ICMStream_fnWrite(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,DWORD flags,LONG *sampwritten,LONG *byteswritten);
  52 static HRESULT WINAPI ICMStream_fnDelete(IAVIStream*iface,LONG start,LONG samples);
  53 static HRESULT WINAPI ICMStream_fnReadData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG *lpread);
  54 static HRESULT WINAPI ICMStream_fnWriteData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG size);
  55 static HRESULT WINAPI ICMStream_fnSetInfo(IAVIStream*iface,AVISTREAMINFOW*info,LONG infolen);
  56
  57 struct ICOM_VTABLE(IAVIStream) iicmst = {
  58   ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
  59   ICMStream_fnQueryInterface,
  60   ICMStream_fnAddRef,
  61   ICMStream_fnRelease,
  62   ICMStream_fnCreate,
  63   ICMStream_fnInfo,
  64   ICMStream_fnFindSample,
  65   ICMStream_fnReadFormat,
  66   ICMStream_fnSetFormat,
  67   ICMStream_fnRead,
  68   ICMStream_fnWrite,
  69   ICMStream_fnDelete,
  70   ICMStream_fnReadData,
  71   ICMStream_fnWriteData,
  72   ICMStream_fnSetInfo
  73 };
  74
  75 typedef struct _IAVIStreamImpl {
  76   /* IUnknown stuff */
  77   ICOM_VFIELD(IAVIStream);
  78   DWORD              ref;
  79
  80   /* IAVIStream stuff */
  81   PAVISTREAM         pStream;
  82   AVISTREAMINFOW     sInfo;
  83
  84   PGETFRAME          pg;
  85   HIC                hic;
  86   DWORD              dwICMFlags;
  87
  88   LONG               lCurrent;
  89   LONG               lLastKey;
  90   LONG               lKeyFrameEvery;
  91   DWORD              dwLastQuality;
  92   DWORD              dwBytesPerFrame;
  93   DWORD              dwUnusedBytes;
  94
  95   LPBITMAPINFOHEADER lpbiCur;  /* current frame */
  96   LPVOID             lpCur;
  97   LPBITMAPINFOHEADER lpbiPrev; /* previous frame */
  98   LPVOID             lpPrev;
  99
 100   LPBITMAPINFOHEADER lpbiOutput; /* output format of codec */
 101   LONG               cbOutput;
 102   LPBITMAPINFOHEADER lpbiInput;  /* input format for codec */
 103   LONG               cbInput;
 104 } IAVIStreamImpl;
 105
 106 /***********************************************************************/
 107
 108 static HRESULT AVIFILE_EncodeFrame(IAVIStreamImpl *This,
 109                                    LPBITMAPINFOHEADER lpbi, LPVOID lpBits);
 110 static HRESULT AVIFILE_OpenGetFrame(IAVIStreamImpl *This);
 111
 112 inline void AVIFILE_Reset(IAVIStreamImpl *This)
 113 {
 114   This->lCurrent      = -1;
 115   This->lLastKey      = 0;
 116   This->dwLastQuality = ICQUALITY_HIGH;
 117   This->dwUnusedBytes = 0;
 118 }
 119
 120 HRESULT AVIFILE_CreateICMStream(REFIID riid, LPVOID *ppv)
 121 {
 122   IAVIStreamImpl *pstream;
 123   HRESULT         hr;
 124
 125   assert(riid != NULL && ppv != NULL);
 126
 127   *ppv = NULL;
 128
 129   pstream = (IAVIStreamImpl*)LocalAlloc(LPTR, sizeof(IAVIStreamImpl));
 130   if (pstream == NULL)
 131     return AVIERR_MEMORY;
 132
 133   ICOM_VTBL(pstream)  = &iicmst;
 134   AVIFILE_Reset(pstream);
 135
 136   hr = IUnknown_QueryInterface((IUnknown*)pstream, riid, ppv);
 137   if (FAILED(hr))
 138     LocalFree((HLOCAL)pstream);
 139
 140   return hr;
 141 }
 142
 143 static HRESULT WINAPI ICMStream_fnQueryInterface(IAVIStream *iface,
 144                                                   REFIID refiid, LPVOID *obj)
 145 {
 146   ICOM_THIS(IAVIStreamImpl,iface);
 147
 148   TRACE("(%p,%s,%p)\n", iface, debugstr_guid(refiid), obj);
 149
 150   if (IsEqualGUID(&IID_IUnknown, refiid) ||
 151       IsEqualGUID(&IID_IAVIStream, refiid)) {
 152     *obj = This;
 153     IAVIStream_AddRef(iface);
 154
 155     return S_OK;
 156   }
 157
 158   return OLE_E_ENUM_NOMORE;
 159 }
 160
 161 static ULONG WINAPI ICMStream_fnAddRef(IAVIStream *iface)
 162 {
 163   ICOM_THIS(IAVIStreamImpl,iface);
 164
 165   TRACE("(%p) -> %ld\n", iface, This->ref + 1);
 166
 167   /* also add reference to the nested stream */
 168   if (This->pStream != NULL)
 169     IAVIStream_AddRef(This->pStream);
 170
 171   return ++(This->ref);
 172 }
 173
 174 static ULONG WINAPI ICMStream_fnRelease(IAVIStream* iface)
 175 {
 176   ICOM_THIS(IAVIStreamImpl,iface);
 177
 178   TRACE("(%p) -> %ld\n", iface, This->ref - 1);
 179
 180   if (This->ref == 0) {
 181     /* destruct */
 182     if (This->pg != NULL) {
 183       AVIStreamGetFrameClose(This->pg);
 184       This->pg = NULL;
 185     }
 186     if (This->pStream != NULL) {
 187       IAVIStream_Release(This->pStream);
 188       This->pStream = NULL;
 189     }
 190     if (This->hic != NULL) {
 191       if (This->lpbiPrev != NULL) {
 192         ICDecompressEnd(This->hic);
 193         GlobalFreePtr(This->lpbiPrev);
 194         This->lpbiPrev = NULL;
 195         This->lpPrev   = NULL;
 196       }
 197       ICCompressEnd(This->hic);
 198       This->hic = NULL;
 199     }
 200     if (This->lpbiCur != NULL) {
 201       GlobalFreePtr(This->lpbiCur);
 202       This->lpbiCur = NULL;
 203       This->lpCur   = NULL;
 204     }
 205     if (This->lpbiOutput != NULL) {
 206       GlobalFreePtr(This->lpbiOutput);
 207       This->lpbiOutput = NULL;
 208       This->cbOutput   = 0;
 209     }
 210     if (This->lpbiInput != NULL) {
 211       GlobalFreePtr(This->lpbiInput);
 212       This->lpbiInput = NULL;
 213       This->cbInput   = 0;
 214     }
 215
 216     LocalFree((HLOCAL)This);
 217
 218     return 0;
 219   }
 220
 221   /* also release reference to the nested stream */
 222   if (This->pStream != NULL)
 223     IAVIStream_Release(This->pStream);
 224
 225   return --This->ref;
 226 }
 227
 228 /* lParam1: PAVISTREAM
 229  * lParam2: LPAVICOMPRESSOPTIONS
 230  */
 231 static HRESULT WINAPI ICMStream_fnCreate(IAVIStream *iface, LPARAM lParam1,
 232                                           LPARAM lParam2)
 233 {
 234   ICOM_THIS(IAVIStreamImpl,iface);
 235
 236   ICINFO               icinfo;
 237   ICCOMPRESSFRAMES     icFrames;
 238   LPAVICOMPRESSOPTIONS pco = (LPAVICOMPRESSOPTIONS)lParam2;
 239
 240   TRACE("(%p,0x%08lX,0x%08lX)\n", iface, lParam1, lParam2);
 241
 242   /* check parameter */
 243   if ((LPVOID)lParam1 == NULL)
 244     return AVIERR_BADPARAM;
 245
 246   /* get infos from stream */
 247   IAVIStream_Info((PAVISTREAM)lParam1, &This->sInfo, sizeof(This->sInfo));
 248   if (This->sInfo.fccType != streamtypeVIDEO)
 249     return AVIERR_ERROR; /* error in registry or AVIMakeCompressedStream */
 250
 251   /* add reference to the stream */
 252   This->pStream = (PAVISTREAM)lParam1;
 253   IAVIStream_AddRef(This->pStream);
 254
 255   AVIFILE_Reset(This);
 256
 257   if (pco != NULL && pco->fccHandler != comptypeDIB) {
 258     /* we should compress */
 259     This->sInfo.fccHandler = pco->fccHandler;
 260
 261     This->hic = ICOpen(ICTYPE_VIDEO, pco->fccHandler, ICMODE_COMPRESS);
 262     if (This->hic == NULL)
 263       return AVIERR_NOCOMPRESSOR;
 264
 265     /* restore saved state of codec */
 266     if (pco->cbParms > 0 && pco->lpParms != NULL) {
 267       ICSetState(This->hic, pco->lpParms, pco->cbParms);
 268     }
 269
 270     /* set quality -- resolve default quality */
 271     This->sInfo.dwQuality = pco->dwQuality;
 272     if (pco->dwQuality == ICQUALITY_DEFAULT)
 273       This->sInfo.dwQuality = ICGetDefaultQuality(This->hic);
 274
 275     /* get capabilities of codec */
 276     ICGetInfo(This->hic, &icinfo, sizeof(icinfo));
 277     This->dwICMFlags = icinfo.dwFlags;
 278
 279     /* use keyframes? */
 280     if ((pco->dwFlags & AVICOMPRESSF_KEYFRAMES) &&
 281         (icinfo.dwFlags & (VIDCF_TEMPORAL|VIDCF_FASTTEMPORALC))) {
 282       This->lKeyFrameEvery = pco->dwKeyFrameEvery;
 283     } else
 284       This->lKeyFrameEvery = 1;
 285
 286     /* use datarate? */
 287     if ((pco->dwFlags & AVICOMPRESSF_DATARATE)) {
 288       /* Do we have a chance to reduce size to desired one? */
 289       if ((icinfo.dwFlags & (VIDCF_CRUNCH|VIDCF_QUALITY)) == 0)
 290         return AVIERR_NOCOMPRESSOR;
 291
 292       assert(This->sInfo.dwRate != 0);
 293
 294       This->dwBytesPerFrame = MulDiv(pco->dwBytesPerSecond,
 295                                      This->sInfo.dwScale, This->sInfo.dwRate);
 296     } else {
 297       pco->dwBytesPerSecond = 0;
 298       This->dwBytesPerFrame = 0;
 299     }
 300
 301     if (icinfo.dwFlags & VIDCF_COMPRESSFRAMES) {
 302       memset(&icFrames, 0, sizeof(icFrames));
 303       icFrames.lpbiOutput  = This->lpbiOutput;
 304       icFrames.lpbiInput   = This->lpbiInput;
 305       icFrames.lFrameCount = This->sInfo.dwLength;
 306       icFrames.lQuality    = This->sInfo.dwQuality;
 307       icFrames.lDataRate   = pco->dwBytesPerSecond;
 308       icFrames.lKeyRate    = This->lKeyFrameEvery;
 309       icFrames.dwRate      = This->sInfo.dwRate;
 310       icFrames.dwScale     = This->sInfo.dwScale;
 311       ICSendMessage(This->hic, ICM_COMPRESS_FRAMES_INFO,
 312                     (LPARAM)&icFrames, (LPARAM)sizeof(icFrames));
 313     }
 314   } else
 315     This->sInfo.fccHandler = comptypeDIB;
 316
 317   return AVIERR_OK;
 318 }
 319
 320 static HRESULT WINAPI ICMStream_fnInfo(IAVIStream *iface,LPAVISTREAMINFOW psi,
 321                                         LONG size)
 322 {
 323   ICOM_THIS(IAVIStreamImpl,iface);
 324
 325   TRACE("(%p,%p,%ld)\n", iface, psi, size);
 326
 327   if (psi == NULL)
 328     return AVIERR_BADPARAM;
 329   if (size < 0)
 330     return AVIERR_BADSIZE;
 331
 332   memcpy(psi, &This->sInfo, min(size, sizeof(This->sInfo)));
 333
 334   if (size < sizeof(This->sInfo))
 335     return AVIERR_BUFFERTOOSMALL;
 336   return AVIERR_OK;
 337 }
 338
 339 static LONG WINAPI ICMStream_fnFindSample(IAVIStream *iface, LONG pos,
 340                                            LONG flags)
 341 {
 342   ICOM_THIS(IAVIStreamImpl,iface);
 343
 344   TRACE("(%p,%ld,0x%08lX)\n",iface,pos,flags);
 345
 346   if (flags & FIND_FROM_START) {
 347     pos = This->sInfo.dwStart;
 348     flags &= ~(FIND_FROM_START|FIND_PREV);
 349     flags |= FIND_NEXT;
 350   }
 351
 352   if (flags & FIND_RET)
 353     WARN(": FIND_RET flags will be ignored!\n");
 354
 355   if (flags & FIND_KEY) {
 356     if (This->hic == NULL)
 357       return pos; /* we decompress so every frame is a keyframe */
 358
 359     if (flags & FIND_PREV) {
 360       /* need to read old or new frames? */
 361       if (This->lLastKey <= pos || pos < This->lCurrent)
 362         IAVIStream_Read(iface, pos, 1, NULL, 0, NULL, NULL);
 363
 364       return This->lLastKey;
 365     }
 366   } else if (flags & FIND_ANY) {
 367     return pos; /* We really don't know, reread is to expensive, so guess. */
 368   } else if (flags & FIND_FORMAT) {
 369     if (flags & FIND_PREV)
 370       return 0;
 371   }
 372
 373   return -1;
 374 }
 375
 376 static HRESULT WINAPI ICMStream_fnReadFormat(IAVIStream *iface, LONG pos,
 377                                               LPVOID format, LONG *formatsize)
 378 {
 379   ICOM_THIS(IAVIStreamImpl,iface);
 380
 381   LPBITMAPINFOHEADER lpbi;
 382   HRESULT            hr;
 383
 384   TRACE("(%p,%ld,%p,%p)\n", iface, pos, format, formatsize);
 385
 386   if (formatsize == NULL)
 387     return AVIERR_BADPARAM;
 388
 389   if (This->pg == NULL) {
 390     hr = AVIFILE_OpenGetFrame(This);
 391
 392     if (FAILED(hr))
 393       return hr;
 394   }
 395
 396   lpbi = (LPBITMAPINFOHEADER)AVIStreamGetFrame(This->pg, pos);
 397   if (lpbi == NULL)
 398     return AVIERR_MEMORY;
 399
 400   if (This->hic == NULL) {
 401     LONG size = lpbi->biSize + lpbi->biClrUsed * sizeof(RGBQUAD);
 402
 403     if (size > 0) {
 404       if (This->sInfo.dwSuggestedBufferSize < lpbi->biSizeImage)
 405         This->sInfo.dwSuggestedBufferSize = lpbi->biSizeImage;
 406
 407       This->cbOutput = size;
 408       if (format != NULL) {
 409         if (This->lpbiOutput != NULL)
 410           memcpy(format, This->lpbiOutput, min(*formatsize, This->cbOutput));
 411         else
 412           memcpy(format, lpbi, min(*formatsize, size));
 413       }
 414     }
 415   } else if (format != NULL)
 416     memcpy(format, This->lpbiOutput, min(*formatsize, This->cbOutput));
 417
 418   if (*formatsize < This->cbOutput)
 419     hr = AVIERR_BUFFERTOOSMALL;
 420   else
 421     hr = AVIERR_OK;
 422
 423   *formatsize = This->cbOutput;
 424   return hr;
 425 }
 426
 427 static HRESULT WINAPI ICMStream_fnSetFormat(IAVIStream *iface, LONG pos,
 428                                              LPVOID format, LONG formatsize)
 429 {
 430   ICOM_THIS(IAVIStreamImpl,iface);
 431
 432   TRACE("(%p,%ld,%p,%ld)\n", iface, pos, format, formatsize);
 433
 434   /* check parameters */
 435   if (format == NULL || formatsize <= 0)
 436     return AVIERR_BADPARAM;
 437
 438   /* We can only accept RGB data for writing */
 439   if (((LPBITMAPINFOHEADER)format)->biCompression != BI_RGB) {
 440     WARN(": need RGB data as input\n");
 441     return AVIERR_UNSUPPORTED;
 442   }
 443
 444   /* Input format already known?
 445    * Changing of palette is supported, but be quiet if it's the same */
 446   if (This->lpbiInput != NULL) {
 447     if (This->cbInput != formatsize)
 448       return AVIERR_UNSUPPORTED;
 449
 450     if (memcmp(format, This->lpbiInput, formatsize) == 0)
 451       return AVIERR_OK;
 452   }
 453
 454   /* Does the nested stream support writing? */
 455   if ((This->sInfo.dwCaps & AVIFILECAPS_CANWRITE) == 0)
 456     return AVIERR_READONLY;
 457
 458   /* check if frame is already written */
 459   if (This->sInfo.dwLength + This->sInfo.dwStart > pos)
 460     return AVIERR_UNSUPPORTED;
 461
 462   /* check if we should compress */
 463   if (This->sInfo.fccHandler == 0 ||
 464       This->sInfo.fccHandler == mmioFOURCC('N','O','N','E'))
 465     This->sInfo.fccHandler = comptypeDIB;
 466
 467   /* only pass through? */
 468   if (This->sInfo.fccHandler == comptypeDIB)
 469     return IAVIStream_SetFormat(This->pStream, pos, format, formatsize);
 470
 471   /* initial format setting? */
 472   if (This->lpbiInput == NULL) {
 473     LONG size;
 474
 475     assert(This->hic != NULL);
 476
 477     /* get memory for input format */
 478     This->lpbiInput = (LPBITMAPINFOHEADER)GlobalAllocPtr(GHND, formatsize);
 479     if (This->lpbiInput == NULL)
 480       return AVIERR_MEMORY;
 481     This->cbInput = formatsize;
 482     memcpy(This->lpbiInput, format, formatsize);
 483
 484     /* get output format */
 485     size = ICCompressGetFormatSize(This->hic, This->lpbiInput);
 486     if (size < sizeof(BITMAPINFOHEADER))
 487       return AVIERR_COMPRESSOR;
 488     This->lpbiOutput = (LPBITMAPINFOHEADER)GlobalAllocPtr(GHND, size);
 489     if (This->lpbiOutput == NULL)
 490       return AVIERR_MEMORY;
 491     This->cbOutput = size;
 492     if (ICCompressGetFormat(This->hic,This->lpbiInput,This->lpbiOutput) < S_OK)
 493       return AVIERR_COMPRESSOR;
 494
 495     /* update AVISTREAMINFO structure */
 496     This->sInfo.rcFrame.right  =
 497       This->sInfo.rcFrame.left + This->lpbiOutput->biWidth;
 498     This->sInfo.rcFrame.bottom =
 499       This->sInfo.rcFrame.top  + This->lpbiOutput->biHeight;
 500
 501     /* prepare codec for compression */
 502     if (ICCompressBegin(This->hic, This->lpbiInput, This->lpbiOutput) != S_OK)
 503       return AVIERR_COMPRESSOR;
 504
 505     /* allocate memory for compressed frame */
 506     size = ICCompressGetSize(This->hic, This->lpbiInput, This->lpbiOutput);
 507     This->lpbiCur =
 508       (LPBITMAPINFOHEADER)GlobalAllocPtr(GMEM_MOVEABLE, This->cbOutput + size);
 509     if (This->lpbiCur == NULL)
 510       return AVIERR_MEMORY;
 511     memcpy(This->lpbiCur, This->lpbiOutput, This->cbOutput);
 512     This->lpCur = DIBPTR(This->lpbiCur);
 513
 514     /* allocate memory for last frame if needed */
 515     if (This->lKeyFrameEvery != 1 &&
 516         (This->dwICMFlags & VIDCF_FASTTEMPORALC) == 0) {
 517       size = ICDecompressGetFormatSize(This->hic, This->lpbiOutput);
 518       This->lpbiPrev = (LPBITMAPINFOHEADER)GlobalAllocPtr(GHND, size);
 519       if (This->lpbiPrev == NULL)
 520         return AVIERR_MEMORY;
 521       if (ICDecompressGetFormat(This->hic, This->lpbiOutput, This->lpbiPrev) < S_OK)
 522         return AVIERR_COMPRESSOR;
 523
 524       if (This->lpbiPrev->biSizeImage == 0) {
 525         This->lpbiPrev->biSizeImage =
 526           DIBWIDTHBYTES(*This->lpbiPrev) * This->lpbiPrev->biHeight;
 527       }
 528
 529       /* get memory for format and picture */
 530       size += This->lpbiPrev->biSizeImage;
 531       This->lpbiPrev =
 532        (LPBITMAPINFOHEADER)GlobalReAllocPtr(This->lpbiPrev,size,GMEM_MOVEABLE);
 533       if (This->lpbiPrev == NULL)
 534         return AVIERR_MEMORY;
 535       This->lpPrev = DIBPTR(This->lpbiPrev);
 536
 537       /* prepare codec also for decompression */
 538       if (ICDecompressBegin(This->hic,This->lpbiOutput,This->lpbiPrev) != S_OK)
 539         return AVIERR_COMPRESSOR;
 540     }
 541   } else {
 542     /* format change -- check that's only the palette */
 543     LPBITMAPINFOHEADER lpbi = (LPBITMAPINFOHEADER)format;
 544
 545     if (lpbi->biSize != This->lpbiInput->biSize ||
 546         lpbi->biWidth != This->lpbiInput->biWidth ||
 547         lpbi->biHeight != This->lpbiInput->biHeight ||
 548         lpbi->biBitCount != This->lpbiInput->biBitCount ||
 549         lpbi->biPlanes != This->lpbiInput->biPlanes ||
 550         lpbi->biCompression != This->lpbiInput->biCompression ||
 551         lpbi->biClrUsed != This->lpbiInput->biClrUsed)
 552       return AVIERR_UNSUPPORTED;
 553
 554     /* get new output format */
 555     if (ICCompressGetFormat(This->hic, lpbi, This->lpbiOutput) < S_OK)
 556       return AVIERR_BADFORMAT;
 557
 558     /* restart compression */
 559     ICCompressEnd(This->hic);
 560     if (ICCompressBegin(This->hic, lpbi, This->lpbiOutput) != S_OK)
 561       return AVIERR_COMPRESSOR;
 562
 563     /* check if we need to restart decompresion also */
 564     if (This->lKeyFrameEvery != 1 &&
 565         (This->dwICMFlags & VIDCF_FASTTEMPORALC) == 0) {
 566       ICDecompressEnd(This->hic);
 567       if (ICDecompressGetFormat(This->hic,This->lpbiOutput,This->lpbiPrev) < S_OK)
 568         return AVIERR_COMPRESSOR;
 569       if (ICDecompressBegin(This->hic,This->lpbiOutput,This->lpbiPrev) != S_OK)
 570         return AVIERR_COMPRESSOR;
 571     }
 572   }
 573
 574   /* tell nested stream the new format */
 575   return IAVIStream_SetFormat(This->pStream, pos,
 576                               This->lpbiOutput, This->cbOutput);
 577 }
 578
 579 static HRESULT WINAPI ICMStream_fnRead(IAVIStream *iface, LONG start,
 580                                         LONG samples, LPVOID buffer,
 581                                         LONG buffersize, LPLONG bytesread,
 582                                         LPLONG samplesread)
 583 {
 584   ICOM_THIS(IAVIStreamImpl,iface);
 585
 586   LPBITMAPINFOHEADER lpbi;
 587
 588   TRACE("(%p,%ld,%ld,%p,%ld,%p,%p)\n", iface, start, samples, buffer,
 589         buffersize, bytesread, samplesread);
 590
 591   /* clear return parameters if given */
 592   if (bytesread != NULL)
 593     *bytesread = 0;
 594   if (samplesread != NULL)
 595     *samplesread = 0;
 596
 597   if (samples == 0)
 598     return AVIERR_OK;
 599
 600   /* check parameters */
 601   if (samples != 1 && (bytesread == NULL && samplesread == NULL))
 602     return AVIERR_BADPARAM;
 603   if (samples == -1) /* read as much as we could */
 604     samples = 1;
 605
 606   if (This->pg == NULL) {
 607     HRESULT hr = AVIFILE_OpenGetFrame(This);
 608
 609     if (FAILED(hr))
 610       return hr;
 611   }
 612
 613   /* compress or decompress? */
 614   if (This->hic == NULL) {
 615     /* decompress */
 616     lpbi = (LPBITMAPINFOHEADER)AVIStreamGetFrame(This->pg, start);
 617     if (lpbi == NULL)
 618       return AVIERR_MEMORY;
 619
 620     if (buffer != NULL && buffersize > 0) {
 621       /* check buffersize */
 622       if (buffersize < lpbi->biSizeImage)
 623         return AVIERR_BUFFERTOOSMALL;
 624
 625       memcpy(buffer, DIBPTR(lpbi), lpbi->biSizeImage);
 626     }
 627
 628     /* fill out return parameters if given */
 629     if (bytesread != NULL)
 630       *bytesread = lpbi->biSizeImage;
 631   } else {
 632     /* compress */
 633     if (This->lCurrent > start)
 634       AVIFILE_Reset(This);
 635
 636     while (start > This->lCurrent) {
 637       HRESULT hr;
 638
 639       lpbi = (LPBITMAPINFOHEADER)AVIStreamGetFrame(This->pg, ++This->lCurrent);
 640       if (lpbi == NULL) {
 641         AVIFILE_Reset(This);
 642         return AVIERR_MEMORY;
 643       }
 644
 645       hr = AVIFILE_EncodeFrame(This, lpbi, DIBPTR(lpbi));
 646       if (FAILED(hr)) {
 647         AVIFILE_Reset(This);
 648         return hr;
 649       }
 650     }
 651
 652     if (buffer != NULL && buffersize > 0) {
 653       /* check buffersize */
 654       if (This->lpbiCur->biSizeImage > buffersize)
 655         return AVIERR_BUFFERTOOSMALL;
 656
 657       memcpy(buffer, This->lpCur, This->lpbiCur->biSizeImage);
 658     }
 659
 660     /* fill out return parameters if given */
 661     if (bytesread != NULL)
 662       *bytesread = This->lpbiCur->biSizeImage;
 663   }
 664
 665   /* fill out return parameters if given */
 666   if (samplesread != NULL)
 667     *samplesread = 1;
 668
 669   return AVIERR_OK;
 670 }
 671
 672 static HRESULT WINAPI ICMStream_fnWrite(IAVIStream *iface, LONG start,
 673                                          LONG samples, LPVOID buffer,
 674                                          LONG buffersize, DWORD flags,
 675                                          LPLONG sampwritten,
 676                                          LPLONG byteswritten)
 677 {
 678   ICOM_THIS(IAVIStreamImpl,iface);
 679
 680   HRESULT hr;
 681
 682   TRACE("(%p,%ld,%ld,%p,%ld,0x%08lX,%p,%p)\n", iface, start, samples,
 683         buffer, buffersize, flags, sampwritten, byteswritten);
 684
 685   /* clear return parameters if given */
 686   if (sampwritten != NULL)
 687     *sampwritten = 0;
 688   if (byteswritten != NULL)
 689     *byteswritten = 0;
 690
 691   /* check parameters */
 692   if (buffer == NULL && (buffersize > 0 || samples > 0))
 693     return AVIERR_BADPARAM;
 694
 695   if (This->sInfo.fccHandler == comptypeDIB) {
 696     /* only pass through */
 697     flags |= AVIIF_KEYFRAME;
 698
 699     return IAVIStream_Write(This->pStream, start, samples, buffer, buffersize,
 700                             flags, sampwritten, byteswritten);
 701   } else {
 702     /* compress data before writing to pStream */
 703     if (samples != 1 && (sampwritten == NULL && byteswritten == NULL))
 704       return AVIERR_UNSUPPORTED;
 705
 706     This->lCurrent = start;
 707     hr = AVIFILE_EncodeFrame(This, This->lpbiInput, buffer);
 708     if (FAILED(hr))
 709       return hr;
 710
 711     if (This->lLastKey == start)
 712       flags |= AVIIF_KEYFRAME;
 713
 714     return IAVIStream_Write(This->pStream, start, samples, This->lpCur,
 715                             This->lpbiCur->biSizeImage, flags, byteswritten,
 716                             sampwritten);
 717   }
 718 }
 719
 720 static HRESULT WINAPI ICMStream_fnDelete(IAVIStream *iface, LONG start,
 721                                           LONG samples)
 722 {
 723   ICOM_THIS(IAVIStreamImpl,iface);
 724
 725   TRACE("(%p,%ld,%ld)\n", iface, start, samples);
 726
 727   return IAVIStream_Delete(This->pStream, start, samples);
 728 }
 729
 730 static HRESULT WINAPI ICMStream_fnReadData(IAVIStream *iface, DWORD fcc,
 731                                             LPVOID lp, LPLONG lpread)
 732 {
 733   ICOM_THIS(IAVIStreamImpl,iface);
 734
 735   TRACE("(%p,0x%08lX,%p,%p)\n", iface, fcc, lp, lpread);
 736
 737   assert(This->pStream != NULL);
 738
 739   return IAVIStream_ReadData(This->pStream, fcc, lp, lpread);
 740 }
 741
 742 static HRESULT WINAPI ICMStream_fnWriteData(IAVIStream *iface, DWORD fcc,
 743                                              LPVOID lp, LONG size)
 744 {
 745   ICOM_THIS(IAVIStreamImpl,iface);
 746
 747   TRACE("(%p,0x%08lx,%p,%ld)\n", iface, fcc, lp, size);
 748
 749   assert(This->pStream != NULL);
 750
 751   return IAVIStream_WriteData(This->pStream, fcc, lp, size);
 752 }
 753
 754 static HRESULT WINAPI ICMStream_fnSetInfo(IAVIStream *iface,
 755                                            LPAVISTREAMINFOW info, LONG infolen)
 756 {
 757   FIXME("(%p,%p,%ld): stub\n", iface, info, infolen);
 758
 759   return E_FAIL;
 760 }
 761
 762 /***********************************************************************/
 763
 764 static HRESULT AVIFILE_EncodeFrame(IAVIStreamImpl *This,
 765                                    LPBITMAPINFOHEADER lpbi, LPVOID lpBits)
 766 {
 767   DWORD dwMinQual, dwMaxQual, dwCurQual;
 768   DWORD dwRequest;
 769   DWORD icmFlags = 0;
 770   DWORD idxFlags = 0;
 771   BOOL  bDecreasedQual = FALSE;
 772   BOOL  doSizeCheck;
 773   BOOL  noPrev;
 774
 775   /* make lKeyFrameEvery and at start a keyframe */
 776   if ((This->lKeyFrameEvery != 0 &&
 777        (This->lCurrent - This->lLastKey) >= This->lKeyFrameEvery) ||
 778       This->lCurrent == This->sInfo.dwStart) {
 779     idxFlags = AVIIF_KEYFRAME;
 780     icmFlags = ICCOMPRESS_KEYFRAME;
 781   }
 782
 783   if (This->lKeyFrameEvery != 0) {
 784     if (This->lCurrent == This->sInfo.dwStart) {
 785       if (idxFlags & AVIIF_KEYFRAME) {
 786         /* for keyframes allow to consume all unused bytes */
 787         dwRequest = This->dwBytesPerFrame + This->dwUnusedBytes;
 788         This->dwUnusedBytes = 0;
 789       } else {
 790         /* for non-keyframes only allow something of the unused bytes to be consumed */
 791         DWORD tmp1 = 0;
 792         DWORD tmp2;
 793
 794         if (This->dwBytesPerFrame >= This->dwUnusedBytes)
 795           tmp1 = This->dwBytesPerFrame / This->lKeyFrameEvery;
 796         tmp2 = (This->dwUnusedBytes + tmp1) / This->lKeyFrameEvery;
 797
 798         dwRequest = This->dwBytesPerFrame - tmp1 + tmp2;
 799         This->dwUnusedBytes -= tmp2;
 800       }
 801     } else
 802       dwRequest = MAX_FRAMESIZE;
 803   } else {
 804     /* only one keyframe at start desired */
 805     if (This->lCurrent == This->sInfo.dwStart) {
 806       dwRequest = This->dwBytesPerFrame + This->dwUnusedBytes;
 807       This->dwUnusedBytes = 0;
 808     } else
 809       dwRequest = MAX_FRAMESIZE;
 810   }
 811
 812   /* must we check for framesize to gain requested
 813    * datarate or could we trust codec? */
 814   doSizeCheck = (dwRequest != 0 && ((This->dwICMFlags & (VIDCF_CRUNCH|VIDCF_QUALITY)) == 0));
 815
 816   dwMaxQual = dwCurQual = This->sInfo.dwQuality;
 817   dwMinQual = ICQUALITY_LOW;
 818
 819   noPrev = TRUE;
 820   if ((icmFlags & ICCOMPRESS_KEYFRAME) == 0 &&
 821       (This->dwICMFlags & VIDCF_FASTTEMPORALC) == 0)
 822     noPrev = FALSE;
 823
 824   do {
 825     DWORD   idxCkid = 0;
 826     HRESULT hr;
 827
 828     hr = ICCompress(This->hic,icmFlags,This->lpbiCur,This->lpCur,lpbi,lpBits,
 829                     &idxCkid, &idxFlags, This->lCurrent, dwRequest, dwCurQual,
 830                     noPrev ? NULL:This->lpbiPrev, noPrev ? NULL:This->lpPrev);
 831     if (hr == ICERR_NEWPALETTE) {
 832       FIXME(": codec has changed palette -- unhandled!\n");
 833     } else if (hr != ICERR_OK)
 834       return AVIERR_COMPRESSOR;
 835
 836     /* need to check for framesize */
 837     if (! doSizeCheck)
 838       break;
 839
 840     if (dwRequest >= This->lpbiCur->biSizeImage) {
 841       /* frame is smaller -- try to maximize quality */
 842       if (dwMaxQual - dwCurQual > 10) {
 843         DWORD tmp = dwRequest / 8;
 844
 845         if (tmp < MAX_FRAMESIZE_DIFF)
 846           tmp = MAX_FRAMESIZE_DIFF;
 847
 848         if (tmp < dwRequest - This->lpbiCur->biSizeImage && bDecreasedQual) {
 849           tmp = dwCurQual;
 850           dwCurQual = (dwMinQual + dwMaxQual) / 2;
 851           dwMinQual = tmp;
 852           continue;
 853         }
 854       } else
 855         break;
 856     } else if (dwMaxQual - dwMinQual <= 1) {
 857       break;
 858     } else {
 859       dwMaxQual = dwCurQual;
 860
 861       if (bDecreasedQual || dwCurQual == This->dwLastQuality)
 862         dwCurQual = (dwMinQual + dwMaxQual) / 2;
 863       else
 864         FIXME(": no new quality computed min=%lu cur=%lu max=%lu last=%lu\n",
 865               dwMinQual, dwCurQual, dwMaxQual, This->dwLastQuality);
 866
 867       bDecreasedQual = TRUE;
 868     }
 869   } while (TRUE);
 870
 871   /* remember some values */
 872   This->dwLastQuality = dwCurQual;
 873   This->dwUnusedBytes = dwRequest - This->lpbiCur->biSizeImage;
 874   if (icmFlags & ICCOMPRESS_KEYFRAME)
 875     This->lLastKey = This->lCurrent;
 876
 877   /* Does we manage previous frame? */
 878   if (This->lpPrev != NULL && This->lKeyFrameEvery != 1)
 879     ICDecompress(This->hic, 0, This->lpbiCur, This->lpCur,
 880                  This->lpbiPrev, This->lpPrev);
 881
 882   return AVIERR_OK;
 883 }
 884
 885 static HRESULT AVIFILE_OpenGetFrame(IAVIStreamImpl *This)
 886 {
 887   LPBITMAPINFOHEADER lpbi;
 888   LONG               size;
 889
 890   /* pre-conditions */
 891   assert(This != NULL);
 892   assert(This->pStream != NULL);
 893   assert(This->pg == NULL);
 894
 895   This->pg = AVIStreamGetFrameOpen(This->pStream, NULL);
 896   if (This->pg == NULL)
 897     return AVIERR_ERROR;
 898
 899   /* When we only decompress this is enough */
 900   if (This->sInfo.fccHandler == comptypeDIB)
 901     return AVIERR_OK;
 902
 903   assert(This->hic != NULL);
 904   assert(This->lpbiOutput == NULL);
 905
 906   /* get input format */
 907   lpbi = (LPBITMAPINFOHEADER)AVIStreamGetFrame(This->pg, This->sInfo.dwStart);
 908   if (lpbi == NULL)
 909     return AVIERR_MEMORY;
 910
 911   /* get memory for output format */
 912   size = ICCompressGetFormatSize(This->hic, lpbi);
 913   if (size < sizeof(BITMAPINFOHEADER))
 914     return AVIERR_COMPRESSOR;
 915   This->lpbiOutput = (LPBITMAPINFOHEADER)GlobalAllocPtr(GHND, size);
 916   if (This->lpbiOutput == NULL)
 917     return AVIERR_MEMORY;
 918   This->cbOutput = size;
 919
 920   if (ICCompressGetFormat(This->hic, lpbi, This->lpbiOutput) < S_OK)
 921     return AVIERR_BADFORMAT;
 922
 923   /* update AVISTREAMINFO structure */
 924   This->sInfo.rcFrame.right  =
 925     This->sInfo.rcFrame.left + This->lpbiOutput->biWidth;
 926   This->sInfo.rcFrame.bottom =
 927     This->sInfo.rcFrame.top  + This->lpbiOutput->biHeight;
 928   This->sInfo.dwSuggestedBufferSize =
 929     ICCompressGetSize(This->hic, lpbi, This->lpbiOutput);
 930
 931   /* prepare codec for compression */
 932   if (ICCompressBegin(This->hic, lpbi, This->lpbiOutput) != S_OK)
 933     return AVIERR_COMPRESSOR;
 934
 935   /* allocate memory for current frame */
 936   size += This->sInfo.dwSuggestedBufferSize;
 937   This->lpbiCur = (LPBITMAPINFOHEADER)GlobalAllocPtr(GMEM_MOVEABLE, size);
 938   if (This->lpbiCur == NULL)
 939     return AVIERR_MEMORY;
 940   memcpy(This->lpbiCur, This->lpbiOutput, This->cbOutput);
 941   This->lpCur = DIBPTR(This->lpbiCur);
 942
 943   /* allocate memory for last frame if needed */
 944   if (This->lKeyFrameEvery != 1 &&
 945       (This->dwICMFlags & VIDCF_FASTTEMPORALC) == 0) {
 946     size = ICDecompressGetFormatSize(This->hic, This->lpbiOutput);
 947     This->lpbiPrev = (LPBITMAPINFOHEADER)GlobalAllocPtr(GHND, size);
 948     if (This->lpbiPrev == NULL)
 949       return AVIERR_MEMORY;
 950     if (ICDecompressGetFormat(This->hic, This->lpbiOutput, This->lpbiPrev) < S_OK)
 951       return AVIERR_COMPRESSOR;
 952
 953     if (This->lpbiPrev->biSizeImage == 0) {
 954       This->lpbiPrev->biSizeImage =
 955         DIBWIDTHBYTES(*This->lpbiPrev) * This->lpbiPrev->biHeight;
 956     }
 957
 958     /* get memory for format and picture */
 959     size += This->lpbiPrev->biSizeImage;
 960     This->lpbiPrev =
 961       (LPBITMAPINFOHEADER)GlobalReAllocPtr(This->lpbiPrev,size,GMEM_MOVEABLE);
 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 }