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 #include <assert.h>
  20 #include <stdarg.h>
  21
  22 #include "windef.h"
  23 #include "winbase.h"
  24 #include "wingdi.h"
  25 #include "winuser.h"
  26 #include "winnls.h"
  27 #include "winerror.h"
  28 #include "mmsystem.h"
  29 #include "vfw.h"
  30 #include "msacm.h"
  31
  32 #include "avifile_private.h"
  33
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(avifile);
  37
  38 #define MAX_FRAMESIZE       (16 * 1024 * 1024)
  39 #define MAX_FRAMESIZE_DIFF  512
  40
  41 /***********************************************************************/
  42
  43 static HRESULT WINAPI ICMStream_fnQueryInterface(IAVIStream*iface,REFIID refiid,LPVOID *obj);
  44 static ULONG   WINAPI ICMStream_fnAddRef(IAVIStream*iface);
  45 static ULONG   WINAPI ICMStream_fnRelease(IAVIStream* iface);
  46 static HRESULT WINAPI ICMStream_fnCreate(IAVIStream*iface,LPARAM lParam1,LPARAM lParam2);
  47 static HRESULT WINAPI ICMStream_fnInfo(IAVIStream*iface,AVISTREAMINFOW *psi,LONG size);
  48 static LONG    WINAPI ICMStream_fnFindSample(IAVIStream*iface,LONG pos,LONG flags);
  49 static HRESULT WINAPI ICMStream_fnReadFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG *formatsize);
  50 static HRESULT WINAPI ICMStream_fnSetFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG formatsize);
  51 static HRESULT WINAPI ICMStream_fnRead(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,LONG *bytesread,LONG *samplesread);
  52 static HRESULT WINAPI ICMStream_fnWrite(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,DWORD flags,LONG *sampwritten,LONG *byteswritten);
  53 static HRESULT WINAPI ICMStream_fnDelete(IAVIStream*iface,LONG start,LONG samples);
  54 static HRESULT WINAPI ICMStream_fnReadData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG *lpread);
  55 static HRESULT WINAPI ICMStream_fnWriteData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG size);
  56 static HRESULT WINAPI ICMStream_fnSetInfo(IAVIStream*iface,AVISTREAMINFOW*info,LONG infolen);
  57
  58 static const struct IAVIStreamVtbl iicmst = {
  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   const IAVIStreamVtbl *lpVtbl;
  78   LONG               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 static 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 = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IAVIStreamImpl));
 130   if (pstream == NULL)
 131     return AVIERR_MEMORY;
 132
 133   pstream->lpVtbl  = &iicmst;
 134   AVIFILE_Reset(pstream);
 135
 136   hr = IAVIStream_QueryInterface((IAVIStream*)pstream, riid, ppv);
 137   if (FAILED(hr))
 138     HeapFree(GetProcessHeap(), 0, pstream);
 139
 140   return hr;
 141 }
 142
 143 static HRESULT WINAPI ICMStream_fnQueryInterface(IAVIStream *iface,
 144                                                   REFIID refiid, LPVOID *obj)
 145 {
 146   IAVIStreamImpl *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   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 164   ULONG ref = InterlockedIncrement(&This->ref);
 165
 166   TRACE("(%p) -> %d\n", iface, ref);
 167
 168   /* also add reference to the nested stream */
 169   if (This->pStream != NULL)
 170     IAVIStream_AddRef(This->pStream);
 171
 172   return ref;
 173 }
 174
 175 static ULONG WINAPI ICMStream_fnRelease(IAVIStream* iface)
 176 {
 177   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 178   ULONG ref = InterlockedDecrement(&This->ref);
 179
 180   TRACE("(%p) -> %d\n", iface, ref);
 181
 182   if (ref == 0) {
 183     /* destruct */
 184     if (This->pg != NULL) {
 185       AVIStreamGetFrameClose(This->pg);
 186       This->pg = NULL;
 187     }
 188     if (This->pStream != NULL) {
 189       IAVIStream_Release(This->pStream);
 190       This->pStream = NULL;
 191     }
 192     if (This->hic != NULL) {
 193       if (This->lpbiPrev != NULL) {
 194         ICDecompressEnd(This->hic);
 195         HeapFree(GetProcessHeap(), 0, This->lpbiPrev);
 196         This->lpbiPrev = NULL;
 197         This->lpPrev   = NULL;
 198       }
 199       ICCompressEnd(This->hic);
 200       This->hic = NULL;
 201     }
 202     if (This->lpbiCur != NULL) {
 203       HeapFree(GetProcessHeap(), 0, This->lpbiCur);
 204       This->lpbiCur = NULL;
 205       This->lpCur   = NULL;
 206     }
 207     if (This->lpbiOutput != NULL) {
 208       HeapFree(GetProcessHeap(), 0, This->lpbiOutput);
 209       This->lpbiOutput = NULL;
 210       This->cbOutput   = 0;
 211     }
 212     if (This->lpbiInput != NULL) {
 213       HeapFree(GetProcessHeap(), 0, This->lpbiInput);
 214       This->lpbiInput = NULL;
 215       This->cbInput   = 0;
 216     }
 217
 218     HeapFree(GetProcessHeap(), 0, This);
 219
 220     return 0;
 221   }
 222
 223   /* also release reference to the nested stream */
 224   if (This->pStream != NULL)
 225     IAVIStream_Release(This->pStream);
 226
 227   return ref;
 228 }
 229
 230 /* lParam1: PAVISTREAM
 231  * lParam2: LPAVICOMPRESSOPTIONS
 232  */
 233 static HRESULT WINAPI ICMStream_fnCreate(IAVIStream *iface, LPARAM lParam1,
 234                                           LPARAM lParam2)
 235 {
 236   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 237
 238   ICINFO               icinfo;
 239   ICCOMPRESSFRAMES     icFrames;
 240   LPAVICOMPRESSOPTIONS pco = (LPAVICOMPRESSOPTIONS)lParam2;
 241
 242   TRACE("(%p,0x%08lX,0x%08lX)\n", iface, lParam1, lParam2);
 243
 244   /* check parameter */
 245   if ((LPVOID)lParam1 == NULL)
 246     return AVIERR_BADPARAM;
 247
 248   /* get infos from stream */
 249   IAVIStream_Info((PAVISTREAM)lParam1, &This->sInfo, sizeof(This->sInfo));
 250   if (This->sInfo.fccType != streamtypeVIDEO)
 251     return AVIERR_ERROR; /* error in registry or AVIMakeCompressedStream */
 252
 253   /* add reference to the stream */
 254   This->pStream = (PAVISTREAM)lParam1;
 255   IAVIStream_AddRef(This->pStream);
 256
 257   AVIFILE_Reset(This);
 258
 259   if (pco != NULL && pco->fccHandler != comptypeDIB) {
 260     /* we should compress */
 261     This->sInfo.fccHandler = pco->fccHandler;
 262
 263     This->hic = ICOpen(ICTYPE_VIDEO, pco->fccHandler, ICMODE_COMPRESS);
 264     if (This->hic == NULL)
 265       return AVIERR_NOCOMPRESSOR;
 266
 267     /* restore saved state of codec */
 268     if (pco->cbParms > 0 && pco->lpParms != NULL) {
 269       ICSetState(This->hic, pco->lpParms, pco->cbParms);
 270     }
 271
 272     /* set quality -- resolve default quality */
 273     This->sInfo.dwQuality = pco->dwQuality;
 274     if (pco->dwQuality == ICQUALITY_DEFAULT)
 275       This->sInfo.dwQuality = ICGetDefaultQuality(This->hic);
 276
 277     /* get capabilities of codec */
 278     ICGetInfo(This->hic, &icinfo, sizeof(icinfo));
 279     This->dwICMFlags = icinfo.dwFlags;
 280
 281     /* use keyframes? */
 282     if ((pco->dwFlags & AVICOMPRESSF_KEYFRAMES) &&
 283         (icinfo.dwFlags & (VIDCF_TEMPORAL|VIDCF_FASTTEMPORALC))) {
 284       This->lKeyFrameEvery = pco->dwKeyFrameEvery;
 285     } else
 286       This->lKeyFrameEvery = 1;
 287
 288     /* use datarate? */
 289     if ((pco->dwFlags & AVICOMPRESSF_DATARATE)) {
 290       /* Do we have a chance to reduce size to desired one? */
 291       if ((icinfo.dwFlags & (VIDCF_CRUNCH|VIDCF_QUALITY)) == 0)
 292         return AVIERR_NOCOMPRESSOR;
 293
 294       assert(This->sInfo.dwRate != 0);
 295
 296       This->dwBytesPerFrame = MulDiv(pco->dwBytesPerSecond,
 297                                      This->sInfo.dwScale, This->sInfo.dwRate);
 298     } else {
 299       pco->dwBytesPerSecond = 0;
 300       This->dwBytesPerFrame = 0;
 301     }
 302
 303     if (icinfo.dwFlags & VIDCF_COMPRESSFRAMES) {
 304       memset(&icFrames, 0, sizeof(icFrames));
 305       icFrames.lpbiOutput  = This->lpbiOutput;
 306       icFrames.lpbiInput   = This->lpbiInput;
 307       icFrames.lFrameCount = This->sInfo.dwLength;
 308       icFrames.lQuality    = This->sInfo.dwQuality;
 309       icFrames.lDataRate   = pco->dwBytesPerSecond;
 310       icFrames.lKeyRate    = This->lKeyFrameEvery;
 311       icFrames.dwRate      = This->sInfo.dwRate;
 312       icFrames.dwScale     = This->sInfo.dwScale;
 313       ICSendMessage(This->hic, ICM_COMPRESS_FRAMES_INFO,
 314                     (LPARAM)&icFrames, (LPARAM)sizeof(icFrames));
 315     }
 316   } else
 317     This->sInfo.fccHandler = comptypeDIB;
 318
 319   return AVIERR_OK;
 320 }
 321
 322 static HRESULT WINAPI ICMStream_fnInfo(IAVIStream *iface,LPAVISTREAMINFOW psi,
 323                                         LONG size)
 324 {
 325   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 326
 327   TRACE("(%p,%p,%d)\n", iface, psi, size);
 328
 329   if (psi == NULL)
 330     return AVIERR_BADPARAM;
 331   if (size < 0)
 332     return AVIERR_BADSIZE;
 333
 334   memcpy(psi, &This->sInfo, min((DWORD)size, sizeof(This->sInfo)));
 335
 336   if ((DWORD)size < sizeof(This->sInfo))
 337     return AVIERR_BUFFERTOOSMALL;
 338   return AVIERR_OK;
 339 }
 340
 341 static LONG WINAPI ICMStream_fnFindSample(IAVIStream *iface, LONG pos,
 342                                            LONG flags)
 343 {
 344   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 345
 346   TRACE("(%p,%d,0x%08X)\n",iface,pos,flags);
 347
 348   if (flags & FIND_FROM_START) {
 349     pos = This->sInfo.dwStart;
 350     flags &= ~(FIND_FROM_START|FIND_PREV);
 351     flags |= FIND_NEXT;
 352   }
 353
 354   if (flags & FIND_RET)
 355     WARN(": FIND_RET flags will be ignored!\n");
 356
 357   if (flags & FIND_KEY) {
 358     if (This->hic == NULL)
 359       return pos; /* we decompress so every frame is a keyframe */
 360
 361     if (flags & FIND_PREV) {
 362       /* need to read old or new frames? */
 363       if (This->lLastKey <= pos || pos < This->lCurrent)
 364         IAVIStream_Read(iface, pos, 1, NULL, 0, NULL, NULL);
 365
 366       return This->lLastKey;
 367     }
 368   } else if (flags & FIND_ANY) {
 369     return pos; /* We really don't know, reread is to expensive, so guess. */
 370   } else if (flags & FIND_FORMAT) {
 371     if (flags & FIND_PREV)
 372       return 0;
 373   }
 374
 375   return -1;
 376 }
 377
 378 static HRESULT WINAPI ICMStream_fnReadFormat(IAVIStream *iface, LONG pos,
 379                                               LPVOID format, LONG *formatsize)
 380 {
 381   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 382
 383   LPBITMAPINFOHEADER lpbi;
 384   HRESULT            hr;
 385
 386   TRACE("(%p,%d,%p,%p)\n", iface, pos, format, formatsize);
 387
 388   if (formatsize == NULL)
 389     return AVIERR_BADPARAM;
 390
 391   if (This->pg == NULL) {
 392     hr = AVIFILE_OpenGetFrame(This);
 393
 394     if (FAILED(hr))
 395       return hr;
 396   }
 397
 398   lpbi = (LPBITMAPINFOHEADER)AVIStreamGetFrame(This->pg, pos);
 399   if (lpbi == NULL)
 400     return AVIERR_MEMORY;
 401
 402   if (This->hic == NULL) {
 403     LONG size = lpbi->biSize + lpbi->biClrUsed * sizeof(RGBQUAD);
 404
 405     if (size > 0) {
 406       if (This->sInfo.dwSuggestedBufferSize < lpbi->biSizeImage)
 407         This->sInfo.dwSuggestedBufferSize = lpbi->biSizeImage;
 408
 409       This->cbOutput = size;
 410       if (format != NULL) {
 411         if (This->lpbiOutput != NULL)
 412           memcpy(format, This->lpbiOutput, min(*formatsize, This->cbOutput));
 413         else
 414           memcpy(format, lpbi, min(*formatsize, size));
 415       }
 416     }
 417   } else if (format != NULL)
 418     memcpy(format, This->lpbiOutput, min(*formatsize, This->cbOutput));
 419
 420   if (*formatsize < This->cbOutput)
 421     hr = AVIERR_BUFFERTOOSMALL;
 422   else
 423     hr = AVIERR_OK;
 424
 425   *formatsize = This->cbOutput;
 426   return hr;
 427 }
 428
 429 static HRESULT WINAPI ICMStream_fnSetFormat(IAVIStream *iface, LONG pos,
 430                                              LPVOID format, LONG formatsize)
 431 {
 432   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 433
 434   TRACE("(%p,%d,%p,%d)\n", iface, pos, format, formatsize);
 435
 436   /* check parameters */
 437   if (format == NULL || formatsize <= 0)
 438     return AVIERR_BADPARAM;
 439
 440   /* We can only accept RGB data for writing */
 441   if (((LPBITMAPINFOHEADER)format)->biCompression != BI_RGB) {
 442     WARN(": need RGB data as input\n");
 443     return AVIERR_UNSUPPORTED;
 444   }
 445
 446   /* Input format already known?
 447    * Changing of palette is supported, but be quiet if it's the same */
 448   if (This->lpbiInput != NULL) {
 449     if (This->cbInput != formatsize)
 450       return AVIERR_UNSUPPORTED;
 451
 452     if (memcmp(format, This->lpbiInput, formatsize) == 0)
 453       return AVIERR_OK;
 454   }
 455
 456   /* Does the nested stream support writing? */
 457   if ((This->sInfo.dwCaps & AVIFILECAPS_CANWRITE) == 0)
 458     return AVIERR_READONLY;
 459
 460   /* check if frame is already written */
 461   if (This->sInfo.dwLength + This->sInfo.dwStart > pos)
 462     return AVIERR_UNSUPPORTED;
 463
 464   /* check if we should compress */
 465   if (This->sInfo.fccHandler == 0 ||
 466       This->sInfo.fccHandler == mmioFOURCC('N','O','N','E'))
 467     This->sInfo.fccHandler = comptypeDIB;
 468
 469   /* only pass through? */
 470   if (This->sInfo.fccHandler == comptypeDIB)
 471     return IAVIStream_SetFormat(This->pStream, pos, format, formatsize);
 472
 473   /* initial format setting? */
 474   if (This->lpbiInput == NULL) {
 475     ULONG size;
 476
 477     assert(This->hic != NULL);
 478
 479     /* get memory for input format */
 480     This->lpbiInput = HeapAlloc(GetProcessHeap(), 0, formatsize);
 481     if (This->lpbiInput == NULL)
 482       return AVIERR_MEMORY;
 483     This->cbInput = formatsize;
 484     memcpy(This->lpbiInput, format, formatsize);
 485
 486     /* get output format */
 487     size = ICCompressGetFormatSize(This->hic, This->lpbiInput);
 488     if (size < sizeof(BITMAPINFOHEADER))
 489       return AVIERR_COMPRESSOR;
 490     This->lpbiOutput = HeapAlloc(GetProcessHeap(), 0, size);
 491     if (This->lpbiOutput == NULL)
 492       return AVIERR_MEMORY;
 493     This->cbOutput = size;
 494     if (ICCompressGetFormat(This->hic,This->lpbiInput,This->lpbiOutput) < S_OK)
 495       return AVIERR_COMPRESSOR;
 496
 497     /* update AVISTREAMINFO structure */
 498     This->sInfo.rcFrame.right  =
 499       This->sInfo.rcFrame.left + This->lpbiOutput->biWidth;
 500     This->sInfo.rcFrame.bottom =
 501       This->sInfo.rcFrame.top  + This->lpbiOutput->biHeight;
 502
 503     /* prepare codec for compression */
 504     if (ICCompressBegin(This->hic, This->lpbiInput, This->lpbiOutput) != S_OK)
 505       return AVIERR_COMPRESSOR;
 506
 507     /* allocate memory for compressed frame */
 508     size = ICCompressGetSize(This->hic, This->lpbiInput, This->lpbiOutput);
 509     This->lpbiCur = HeapAlloc(GetProcessHeap(), 0, This->cbOutput + size);
 510     if (This->lpbiCur == NULL)
 511       return AVIERR_MEMORY;
 512     memcpy(This->lpbiCur, This->lpbiOutput, This->cbOutput);
 513     This->lpCur = DIBPTR(This->lpbiCur);
 514
 515     /* allocate memory for last frame if needed */
 516     if (This->lKeyFrameEvery != 1 &&
 517         (This->dwICMFlags & VIDCF_FASTTEMPORALC) == 0) {
 518       size = ICDecompressGetFormatSize(This->hic, This->lpbiOutput);
 519       This->lpbiPrev = HeapAlloc(GetProcessHeap(), 0, size);
 520       if (This->lpbiPrev == NULL)
 521         return AVIERR_MEMORY;
 522       if (ICDecompressGetFormat(This->hic, This->lpbiOutput, This->lpbiPrev) < S_OK)
 523         return AVIERR_COMPRESSOR;
 524
 525       if (This->lpbiPrev->biSizeImage == 0) {
 526         This->lpbiPrev->biSizeImage =
 527           DIBWIDTHBYTES(*This->lpbiPrev) * This->lpbiPrev->biHeight;
 528       }
 529
 530       /* get memory for format and picture */
 531       size += This->lpbiPrev->biSizeImage;
 532       This->lpbiPrev = HeapReAlloc(GetProcessHeap(), 0, This->lpbiPrev, size);
 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   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 585
 586   LPBITMAPINFOHEADER lpbi;
 587
 588   TRACE("(%p,%d,%d,%p,%d,%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   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 679
 680   HRESULT hr;
 681
 682   TRACE("(%p,%d,%d,%p,%d,0x%08X,%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   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 724
 725   TRACE("(%p,%d,%d)\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   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 734
 735   TRACE("(%p,0x%08X,%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   IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
 746
 747   TRACE("(%p,0x%08x,%p,%d)\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,%d): 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=%u cur=%u max=%u last=%u\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   DWORD              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 ((LONG)size < (LONG)sizeof(BITMAPINFOHEADER))
 914     return AVIERR_COMPRESSOR;
 915   This->lpbiOutput = HeapAlloc(GetProcessHeap(), 0, 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 = HeapAlloc(GetProcessHeap(), 0, 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 = HeapAlloc(GetProcessHeap(), 0, 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 = HeapReAlloc(GetProcessHeap(), 0, This->lpbiPrev, size );
 961     if (This->lpbiPrev == NULL)
 962       return AVIERR_MEMORY;
 963     This->lpPrev = DIBPTR(This->lpbiPrev);
 964
 965     /* prepare codec also for decompression */
 966     if (ICDecompressBegin(This->hic,This->lpbiOutput,This->lpbiPrev) != S_OK)
 967       return AVIERR_COMPRESSOR;
 968   }
 969
 970   return AVIERR_OK;
 971 }