dll/win32/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 "winerror.h"
  27 #include "mmsystem.h"
  28 #include "vfw.h"
  29
  30 #include "avifile_private.h"
  31
  32 #include "wine/debug.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(avifile);
  35
  36 #define MAX_FRAMESIZE       (16 * 1024 * 1024)
  37 #define MAX_FRAMESIZE_DIFF  512
  38
  39 /***********************************************************************/
  40
  41 typedef struct _IAVIStreamImpl {
  42   /* IUnknown stuff */
  43   IAVIStream         IAVIStream_iface;
  44   LONG               ref;
  45
  46   /* IAVIStream stuff */
  47   PAVISTREAM         pStream;
  48   AVISTREAMINFOW     sInfo;
  49
  50   PGETFRAME          pg;
  51   HIC                hic;
  52   DWORD              dwICMFlags;
  53
  54   LONG               lCurrent;
  55   LONG               lLastKey;
  56   LONG               lKeyFrameEvery;
  57   DWORD              dwLastQuality;
  58   DWORD              dwBytesPerFrame;
  59   DWORD              dwUnusedBytes;
  60
  61   LPBITMAPINFOHEADER lpbiCur;  /* current frame */
  62   LPVOID             lpCur;
  63   LPBITMAPINFOHEADER lpbiPrev; /* previous frame */
  64   LPVOID             lpPrev;
  65
  66   LPBITMAPINFOHEADER lpbiOutput; /* output format of codec */
  67   LONG               cbOutput;
  68   LPBITMAPINFOHEADER lpbiInput;  /* input format for codec */
  69   LONG               cbInput;
  70 } IAVIStreamImpl;
  71
  72 /***********************************************************************/
  73
  74 static HRESULT AVIFILE_EncodeFrame(IAVIStreamImpl *This,
  75                                    LPBITMAPINFOHEADER lpbi, LPVOID lpBits);
  76 static HRESULT AVIFILE_OpenGetFrame(IAVIStreamImpl *This);
  77
  78 static inline IAVIStreamImpl *impl_from_IAVIStream(IAVIStream *iface)
  79 {
  80   return CONTAINING_RECORD(iface, IAVIStreamImpl, IAVIStream_iface);
  81 }
  82
  83 static inline void AVIFILE_Reset(IAVIStreamImpl *This)
  84 {
  85   This->lCurrent      = -1;
  86   This->lLastKey      = 0;
  87   This->dwLastQuality = ICQUALITY_HIGH;
  88   This->dwUnusedBytes = 0;
  89 }
  90
  91 static HRESULT WINAPI ICMStream_fnQueryInterface(IAVIStream *iface,
  92                                                   REFIID refiid, LPVOID *obj)
  93 {
  94   IAVIStreamImpl *This = impl_from_IAVIStream(iface);
  95
  96   TRACE("(%p,%s,%p)\n", iface, debugstr_guid(refiid), obj);
  97
  98   if (IsEqualGUID(&IID_IUnknown, refiid) ||
  99       IsEqualGUID(&IID_IAVIStream, refiid)) {
 100     *obj = &This->IAVIStream_iface;
 101     IAVIStream_AddRef(iface);
 102
 103     return S_OK;
 104   }
 105
 106   return OLE_E_ENUM_NOMORE;
 107 }
 108
 109 static ULONG WINAPI ICMStream_fnAddRef(IAVIStream *iface)
 110 {
 111   IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 112   ULONG ref = InterlockedIncrement(&This->ref);
 113
 114   TRACE("(%p) -> %d\n", iface, ref);
 115
 116   /* also add reference to the nested stream */
 117   if (This->pStream != NULL)
 118     IAVIStream_AddRef(This->pStream);
 119
 120   return ref;
 121 }
 122
 123 static ULONG WINAPI ICMStream_fnRelease(IAVIStream* iface)
 124 {
 125   IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 126   ULONG ref = InterlockedDecrement(&This->ref);
 127
 128   TRACE("(%p) -> %d\n", iface, ref);
 129
 130   if (ref == 0) {
 131     /* destruct */
 132     if (This->pg != NULL) {
 133       AVIStreamGetFrameClose(This->pg);
 134       This->pg = NULL;
 135     }
 136     if (This->pStream != NULL) {
 137       IAVIStream_Release(This->pStream);
 138       This->pStream = NULL;
 139     }
 140     if (This->hic != NULL) {
 141       if (This->lpbiPrev != NULL) {
 142         ICDecompressEnd(This->hic);
 143         HeapFree(GetProcessHeap(), 0, This->lpbiPrev);
 144         This->lpbiPrev = NULL;
 145         This->lpPrev   = NULL;
 146       }
 147       ICCompressEnd(This->hic);
 148       This->hic = NULL;
 149     }
 150     if (This->lpbiCur != NULL) {
 151       HeapFree(GetProcessHeap(), 0, This->lpbiCur);
 152       This->lpbiCur = NULL;
 153       This->lpCur   = NULL;
 154     }
 155     if (This->lpbiOutput != NULL) {
 156       HeapFree(GetProcessHeap(), 0, This->lpbiOutput);
 157       This->lpbiOutput = NULL;
 158       This->cbOutput   = 0;
 159     }
 160     if (This->lpbiInput != NULL) {
 161       HeapFree(GetProcessHeap(), 0, This->lpbiInput);
 162       This->lpbiInput = NULL;
 163       This->cbInput   = 0;
 164     }
 165
 166     HeapFree(GetProcessHeap(), 0, This);
 167
 168     return 0;
 169   }
 170
 171   /* also release reference to the nested stream */
 172   if (This->pStream != NULL)
 173     IAVIStream_Release(This->pStream);
 174
 175   return ref;
 176 }
 177
 178 /* lParam1: PAVISTREAM
 179  * lParam2: LPAVICOMPRESSOPTIONS
 180  */
 181 static HRESULT WINAPI ICMStream_fnCreate(IAVIStream *iface, LPARAM lParam1,
 182                                           LPARAM lParam2)
 183 {
 184   IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 185
 186   ICINFO               icinfo;
 187   ICCOMPRESSFRAMES     icFrames;
 188   LPAVICOMPRESSOPTIONS pco = (LPAVICOMPRESSOPTIONS)lParam2;
 189
 190   TRACE("(%p,0x%08lX,0x%08lX)\n", iface, lParam1, lParam2);
 191
 192   /* check parameter */
 193   if ((LPVOID)lParam1 == NULL)
 194     return AVIERR_BADPARAM;
 195
 196   /* get infos from stream */
 197   IAVIStream_Info((PAVISTREAM)lParam1, &This->sInfo, sizeof(This->sInfo));
 198   if (This->sInfo.fccType != streamtypeVIDEO)
 199     return AVIERR_ERROR; /* error in registry or AVIMakeCompressedStream */
 200
 201   /* add reference to the stream */
 202   This->pStream = (PAVISTREAM)lParam1;
 203   IAVIStream_AddRef(This->pStream);
 204
 205   AVIFILE_Reset(This);
 206
 207   if (pco != NULL && pco->fccHandler != comptypeDIB) {
 208     /* we should compress */
 209     This->sInfo.fccHandler = pco->fccHandler;
 210
 211     This->hic = ICOpen(ICTYPE_VIDEO, pco->fccHandler, ICMODE_COMPRESS);
 212     if (This->hic == NULL)
 213       return AVIERR_NOCOMPRESSOR;
 214
 215     /* restore saved state of codec */
 216     if (pco->cbParms > 0 && pco->lpParms != NULL) {
 217       ICSetState(This->hic, pco->lpParms, pco->cbParms);
 218     }
 219
 220     /* set quality -- resolve default quality */
 221     This->sInfo.dwQuality = pco->dwQuality;
 222     if (pco->dwQuality == ICQUALITY_DEFAULT)
 223       This->sInfo.dwQuality = ICGetDefaultQuality(This->hic);
 224
 225     /* get capabilities of codec */
 226     ICGetInfo(This->hic, &icinfo, sizeof(icinfo));
 227     This->dwICMFlags = icinfo.dwFlags;
 228
 229     /* use keyframes? */
 230     if ((pco->dwFlags & AVICOMPRESSF_KEYFRAMES) &&
 231         (icinfo.dwFlags & (VIDCF_TEMPORAL|VIDCF_FASTTEMPORALC))) {
 232       This->lKeyFrameEvery = pco->dwKeyFrameEvery;
 233     } else
 234       This->lKeyFrameEvery = 1;
 235
 236     /* use datarate? */
 237     if ((pco->dwFlags & AVICOMPRESSF_DATARATE)) {
 238       /* Do we have a chance to reduce size to desired one? */
 239       if ((icinfo.dwFlags & (VIDCF_CRUNCH|VIDCF_QUALITY)) == 0)
 240         return AVIERR_NOCOMPRESSOR;
 241
 242       assert(This->sInfo.dwRate != 0);
 243
 244       This->dwBytesPerFrame = MulDiv(pco->dwBytesPerSecond,
 245                                      This->sInfo.dwScale, This->sInfo.dwRate);
 246     } else {
 247       pco->dwBytesPerSecond = 0;
 248       This->dwBytesPerFrame = 0;
 249     }
 250
 251     if (icinfo.dwFlags & VIDCF_COMPRESSFRAMES) {
 252       memset(&icFrames, 0, sizeof(icFrames));
 253       icFrames.lpbiOutput  = This->lpbiOutput;
 254       icFrames.lpbiInput   = This->lpbiInput;
 255       icFrames.lFrameCount = This->sInfo.dwLength;
 256       icFrames.lQuality    = This->sInfo.dwQuality;
 257       icFrames.lDataRate   = pco->dwBytesPerSecond;
 258       icFrames.lKeyRate    = This->lKeyFrameEvery;
 259       icFrames.dwRate      = This->sInfo.dwRate;
 260       icFrames.dwScale     = This->sInfo.dwScale;
 261       ICSendMessage(This->hic, ICM_COMPRESS_FRAMES_INFO,
 262                     (LPARAM)&icFrames, (LPARAM)sizeof(icFrames));
 263     }
 264   } else
 265     This->sInfo.fccHandler = comptypeDIB;
 266
 267   return AVIERR_OK;
 268 }
 269
 270 static HRESULT WINAPI ICMStream_fnInfo(IAVIStream *iface,LPAVISTREAMINFOW psi,
 271                                         LONG size)
 272 {
 273   IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 274
 275   TRACE("(%p,%p,%d)\n", iface, psi, size);
 276
 277   if (psi == NULL)
 278     return AVIERR_BADPARAM;
 279   if (size < 0)
 280     return AVIERR_BADSIZE;
 281
 282   memcpy(psi, &This->sInfo, min((DWORD)size, sizeof(This->sInfo)));
 283
 284   if ((DWORD)size < sizeof(This->sInfo))
 285     return AVIERR_BUFFERTOOSMALL;
 286   return AVIERR_OK;
 287 }
 288
 289 static LONG WINAPI ICMStream_fnFindSample(IAVIStream *iface, LONG pos,
 290                                            LONG flags)
 291 {
 292   IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 293
 294   TRACE("(%p,%d,0x%08X)\n",iface,pos,flags);
 295
 296   if (flags & FIND_FROM_START) {
 297     pos = This->sInfo.dwStart;
 298     flags &= ~(FIND_FROM_START|FIND_PREV);
 299     flags |= FIND_NEXT;
 300   }
 301
 302   if (flags & FIND_RET)
 303     WARN(": FIND_RET flags will be ignored!\n");
 304
 305   if (flags & FIND_KEY) {
 306     if (This->hic == NULL)
 307       return pos; /* we decompress so every frame is a keyframe */
 308
 309     if (flags & FIND_PREV) {
 310       /* need to read old or new frames? */
 311       if (This->lLastKey <= pos || pos < This->lCurrent)
 312         IAVIStream_Read(iface, pos, 1, NULL, 0, NULL, NULL);
 313
 314       return This->lLastKey;
 315     }
 316   } else if (flags & FIND_ANY) {
 317     return pos; /* We really don't know, reread is too expensive, so guess. */
 318   } else if (flags & FIND_FORMAT) {
 319     if (flags & FIND_PREV)
 320       return 0;
 321   }
 322
 323   return -1;
 324 }
 325
 326 static HRESULT WINAPI ICMStream_fnReadFormat(IAVIStream *iface, LONG pos,
 327                                               LPVOID format, LONG *formatsize)
 328 {
 329   IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 330
 331   LPBITMAPINFOHEADER lpbi;
 332   HRESULT            hr;
 333
 334   TRACE("(%p,%d,%p,%p)\n", iface, pos, format, formatsize);
 335
 336   if (formatsize == NULL)
 337     return AVIERR_BADPARAM;
 338
 339   if (This->pg == NULL) {
 340     hr = AVIFILE_OpenGetFrame(This);
 341
 342     if (FAILED(hr))
 343       return hr;
 344   }
 345
 346   lpbi = AVIStreamGetFrame(This->pg, pos);
 347   if (lpbi == NULL)
 348     return AVIERR_MEMORY;
 349
 350   if (This->hic == NULL) {
 351     LONG size = lpbi->biSize + lpbi->biClrUsed * sizeof(RGBQUAD);
 352
 353     if (size > 0) {
 354       if (This->sInfo.dwSuggestedBufferSize < lpbi->biSizeImage)
 355         This->sInfo.dwSuggestedBufferSize = lpbi->biSizeImage;
 356
 357       This->cbOutput = size;
 358       if (format != NULL) {
 359         if (This->lpbiOutput != NULL)
 360           memcpy(format, This->lpbiOutput, min(*formatsize, This->cbOutput));
 361         else
 362           memcpy(format, lpbi, min(*formatsize, size));
 363       }
 364     }
 365   } else if (format != NULL)
 366     memcpy(format, This->lpbiOutput, min(*formatsize, This->cbOutput));
 367
 368   if (*formatsize < This->cbOutput)
 369     hr = AVIERR_BUFFERTOOSMALL;
 370   else
 371     hr = AVIERR_OK;
 372
 373   *formatsize = This->cbOutput;
 374   return hr;
 375 }
 376
 377 static HRESULT WINAPI ICMStream_fnSetFormat(IAVIStream *iface, LONG pos,
 378                                              LPVOID format, LONG formatsize)
 379 {
 380   IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 381
 382   TRACE("(%p,%d,%p,%d)\n", iface, pos, format, formatsize);
 383
 384   /* check parameters */
 385   if (format == NULL || formatsize <= 0)
 386     return AVIERR_BADPARAM;
 387
 388   /* We can only accept RGB data for writing */
 389   if (((LPBITMAPINFOHEADER)format)->biCompression != BI_RGB) {
 390     WARN(": need RGB data as input\n");
 391     return AVIERR_UNSUPPORTED;
 392   }
 393
 394   /* Input format already known?
 395    * Changing of palette is supported, but be quiet if it's the same */
 396   if (This->lpbiInput != NULL) {
 397     if (This->cbInput != formatsize)
 398       return AVIERR_UNSUPPORTED;
 399
 400     if (memcmp(format, This->lpbiInput, formatsize) == 0)
 401       return AVIERR_OK;
 402   }
 403
 404   /* Does the nested stream support writing? */
 405   if ((This->sInfo.dwCaps & AVIFILECAPS_CANWRITE) == 0)
 406     return AVIERR_READONLY;
 407
 408   /* check if frame is already written */
 409   if (This->sInfo.dwLength + This->sInfo.dwStart > pos)
 410     return AVIERR_UNSUPPORTED;
 411
 412   /* check if we should compress */
 413   if (This->sInfo.fccHandler == 0 ||
 414       This->sInfo.fccHandler == mmioFOURCC('N','O','N','E'))
 415     This->sInfo.fccHandler = comptypeDIB;
 416
 417   /* only pass through? */
 418   if (This->sInfo.fccHandler == comptypeDIB)
 419     return IAVIStream_SetFormat(This->pStream, pos, format, formatsize);
 420
 421   /* initial format setting? */
 422   if (This->lpbiInput == NULL) {
 423     ULONG size;
 424
 425     assert(This->hic != NULL);
 426
 427     /* get memory for input format */
 428     This->lpbiInput = HeapAlloc(GetProcessHeap(), 0, formatsize);
 429     if (This->lpbiInput == NULL)
 430       return AVIERR_MEMORY;
 431     This->cbInput = formatsize;
 432     memcpy(This->lpbiInput, format, formatsize);
 433
 434     /* get output format */
 435     size = ICCompressGetFormatSize(This->hic, This->lpbiInput);
 436     if (size < sizeof(BITMAPINFOHEADER))
 437       return AVIERR_COMPRESSOR;
 438     This->lpbiOutput = HeapAlloc(GetProcessHeap(), 0, size);
 439     if (This->lpbiOutput == NULL)
 440       return AVIERR_MEMORY;
 441     This->cbOutput = size;
 442     if (ICCompressGetFormat(This->hic,This->lpbiInput,This->lpbiOutput) < S_OK)
 443       return AVIERR_COMPRESSOR;
 444
 445     /* update AVISTREAMINFO structure */
 446     This->sInfo.rcFrame.right  =
 447       This->sInfo.rcFrame.left + This->lpbiOutput->biWidth;
 448     This->sInfo.rcFrame.bottom =
 449       This->sInfo.rcFrame.top  + This->lpbiOutput->biHeight;
 450
 451     /* prepare codec for compression */
 452     if (ICCompressBegin(This->hic, This->lpbiInput, This->lpbiOutput) != S_OK)
 453       return AVIERR_COMPRESSOR;
 454
 455     /* allocate memory for compressed frame */
 456     size = ICCompressGetSize(This->hic, This->lpbiInput, This->lpbiOutput);
 457     This->lpbiCur = HeapAlloc(GetProcessHeap(), 0, This->cbOutput + size);
 458     if (This->lpbiCur == NULL)
 459       return AVIERR_MEMORY;
 460     memcpy(This->lpbiCur, This->lpbiOutput, This->cbOutput);
 461     This->lpCur = DIBPTR(This->lpbiCur);
 462
 463     /* allocate memory for last frame if needed */
 464     if (This->lKeyFrameEvery != 1 &&
 465         (This->dwICMFlags & VIDCF_FASTTEMPORALC) == 0) {
 466       size = ICDecompressGetFormatSize(This->hic, This->lpbiOutput);
 467       This->lpbiPrev = HeapAlloc(GetProcessHeap(), 0, size);
 468       if (This->lpbiPrev == NULL)
 469         return AVIERR_MEMORY;
 470       if (ICDecompressGetFormat(This->hic, This->lpbiOutput, This->lpbiPrev) < S_OK)
 471         return AVIERR_COMPRESSOR;
 472
 473       if (This->lpbiPrev->biSizeImage == 0) {
 474         This->lpbiPrev->biSizeImage =
 475           DIBWIDTHBYTES(*This->lpbiPrev) * This->lpbiPrev->biHeight;
 476       }
 477
 478       /* get memory for format and picture */
 479       size += This->lpbiPrev->biSizeImage;
 480       This->lpbiPrev = HeapReAlloc(GetProcessHeap(), 0, This->lpbiPrev, size);
 481       if (This->lpbiPrev == NULL)
 482         return AVIERR_MEMORY;
 483       This->lpPrev = DIBPTR(This->lpbiPrev);
 484
 485       /* prepare codec also for decompression */
 486       if (ICDecompressBegin(This->hic,This->lpbiOutput,This->lpbiPrev) != S_OK)
 487         return AVIERR_COMPRESSOR;
 488     }
 489   } else {
 490     /* format change -- check that's only the palette */
 491     LPBITMAPINFOHEADER lpbi = format;
 492
 493     if (lpbi->biSize != This->lpbiInput->biSize ||
 494         lpbi->biWidth != This->lpbiInput->biWidth ||
 495         lpbi->biHeight != This->lpbiInput->biHeight ||
 496         lpbi->biBitCount != This->lpbiInput->biBitCount ||
 497         lpbi->biPlanes != This->lpbiInput->biPlanes ||
 498         lpbi->biCompression != This->lpbiInput->biCompression ||
 499         lpbi->biClrUsed != This->lpbiInput->biClrUsed)
 500       return AVIERR_UNSUPPORTED;
 501
 502     /* get new output format */
 503     if (ICCompressGetFormat(This->hic, lpbi, This->lpbiOutput) < S_OK)
 504       return AVIERR_BADFORMAT;
 505
 506     /* restart compression */
 507     ICCompressEnd(This->hic);
 508     if (ICCompressBegin(This->hic, lpbi, This->lpbiOutput) != S_OK)
 509       return AVIERR_COMPRESSOR;
 510
 511     /* check if we need to restart decompression also */
 512     if (This->lKeyFrameEvery != 1 &&
 513         (This->dwICMFlags & VIDCF_FASTTEMPORALC) == 0) {
 514       ICDecompressEnd(This->hic);
 515       if (ICDecompressGetFormat(This->hic,This->lpbiOutput,This->lpbiPrev) < S_OK)
 516         return AVIERR_COMPRESSOR;
 517       if (ICDecompressBegin(This->hic,This->lpbiOutput,This->lpbiPrev) != S_OK)
 518         return AVIERR_COMPRESSOR;
 519     }
 520   }
 521
 522   /* tell nested stream the new format */
 523   return IAVIStream_SetFormat(This->pStream, pos,
 524                               This->lpbiOutput, This->cbOutput);
 525 }
 526
 527 static HRESULT WINAPI ICMStream_fnRead(IAVIStream *iface, LONG start,
 528                                         LONG samples, LPVOID buffer,
 529                                         LONG buffersize, LPLONG bytesread,
 530                                         LPLONG samplesread)
 531 {
 532   IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 533
 534   LPBITMAPINFOHEADER lpbi;
 535
 536   TRACE("(%p,%d,%d,%p,%d,%p,%p)\n", iface, start, samples, buffer,
 537         buffersize, bytesread, samplesread);
 538
 539   /* clear return parameters if given */
 540   if (bytesread != NULL)
 541     *bytesread = 0;
 542   if (samplesread != NULL)
 543     *samplesread = 0;
 544
 545   if (samples == 0)
 546     return AVIERR_OK;
 547
 548   /* check parameters */
 549   if (samples != 1 && (bytesread == NULL && samplesread == NULL))
 550     return AVIERR_BADPARAM;
 551   if (samples == -1) /* read as much as we could */
 552     samples = 1;
 553
 554   if (This->pg == NULL) {
 555     HRESULT hr = AVIFILE_OpenGetFrame(This);
 556
 557     if (FAILED(hr))
 558       return hr;
 559   }
 560
 561   /* compress or decompress? */
 562   if (This->hic == NULL) {
 563     /* decompress */
 564     lpbi = AVIStreamGetFrame(This->pg, start);
 565     if (lpbi == NULL)
 566       return AVIERR_MEMORY;
 567
 568     if (buffer != NULL && buffersize > 0) {
 569       /* check buffersize */
 570       if (buffersize < lpbi->biSizeImage)
 571         return AVIERR_BUFFERTOOSMALL;
 572
 573       memcpy(buffer, DIBPTR(lpbi), lpbi->biSizeImage);
 574     }
 575
 576     /* fill out return parameters if given */
 577     if (bytesread != NULL)
 578       *bytesread = lpbi->biSizeImage;
 579   } else {
 580     /* compress */
 581     if (This->lCurrent > start)
 582       AVIFILE_Reset(This);
 583
 584     while (start > This->lCurrent) {
 585       HRESULT hr;
 586
 587       lpbi = AVIStreamGetFrame(This->pg, ++This->lCurrent);
 588       if (lpbi == NULL) {
 589         AVIFILE_Reset(This);
 590         return AVIERR_MEMORY;
 591       }
 592
 593       hr = AVIFILE_EncodeFrame(This, lpbi, DIBPTR(lpbi));
 594       if (FAILED(hr)) {
 595         AVIFILE_Reset(This);
 596         return hr;
 597       }
 598     }
 599
 600     if (buffer != NULL && buffersize > 0) {
 601       /* check buffersize */
 602       if (This->lpbiCur->biSizeImage > buffersize)
 603         return AVIERR_BUFFERTOOSMALL;
 604
 605       memcpy(buffer, This->lpCur, This->lpbiCur->biSizeImage);
 606     }
 607
 608     /* fill out return parameters if given */
 609     if (bytesread != NULL)
 610       *bytesread = This->lpbiCur->biSizeImage;
 611   }
 612
 613   /* fill out return parameters if given */
 614   if (samplesread != NULL)
 615     *samplesread = 1;
 616
 617   return AVIERR_OK;
 618 }
 619
 620 static HRESULT WINAPI ICMStream_fnWrite(IAVIStream *iface, LONG start,
 621                                          LONG samples, LPVOID buffer,
 622                                          LONG buffersize, DWORD flags,
 623                                          LPLONG sampwritten,
 624                                          LPLONG byteswritten)
 625 {
 626   IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 627
 628   HRESULT hr;
 629
 630   TRACE("(%p,%d,%d,%p,%d,0x%08X,%p,%p)\n", iface, start, samples,
 631         buffer, buffersize, flags, sampwritten, byteswritten);
 632
 633   /* clear return parameters if given */
 634   if (sampwritten != NULL)
 635     *sampwritten = 0;
 636   if (byteswritten != NULL)
 637     *byteswritten = 0;
 638
 639   /* check parameters */
 640   if (buffer == NULL && (buffersize > 0 || samples > 0))
 641     return AVIERR_BADPARAM;
 642
 643   if (This->sInfo.fccHandler == comptypeDIB) {
 644     /* only pass through */
 645     flags |= AVIIF_KEYFRAME;
 646
 647     return IAVIStream_Write(This->pStream, start, samples, buffer, buffersize,
 648                             flags, sampwritten, byteswritten);
 649   } else {
 650     /* compress data before writing to pStream */
 651     if (samples != 1 && (sampwritten == NULL && byteswritten == NULL))
 652       return AVIERR_UNSUPPORTED;
 653
 654     This->lCurrent = start;
 655     hr = AVIFILE_EncodeFrame(This, This->lpbiInput, buffer);
 656     if (FAILED(hr))
 657       return hr;
 658
 659     if (This->lLastKey == start)
 660       flags |= AVIIF_KEYFRAME;
 661
 662     return IAVIStream_Write(This->pStream, start, samples, This->lpCur,
 663                             This->lpbiCur->biSizeImage, flags, byteswritten,
 664                             sampwritten);
 665   }
 666 }
 667
 668 static HRESULT WINAPI ICMStream_fnDelete(IAVIStream *iface, LONG start,
 669                                           LONG samples)
 670 {
 671   IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 672
 673   TRACE("(%p,%d,%d)\n", iface, start, samples);
 674
 675   return IAVIStream_Delete(This->pStream, start, samples);
 676 }
 677
 678 static HRESULT WINAPI ICMStream_fnReadData(IAVIStream *iface, DWORD fcc,
 679                                             LPVOID lp, LPLONG lpread)
 680 {
 681   IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 682
 683   TRACE("(%p,0x%08X,%p,%p)\n", iface, fcc, lp, lpread);
 684
 685   assert(This->pStream != NULL);
 686
 687   return IAVIStream_ReadData(This->pStream, fcc, lp, lpread);
 688 }
 689
 690 static HRESULT WINAPI ICMStream_fnWriteData(IAVIStream *iface, DWORD fcc,
 691                                              LPVOID lp, LONG size)
 692 {
 693   IAVIStreamImpl *This = impl_from_IAVIStream(iface);
 694
 695   TRACE("(%p,0x%08x,%p,%d)\n", iface, fcc, lp, size);
 696
 697   assert(This->pStream != NULL);
 698
 699   return IAVIStream_WriteData(This->pStream, fcc, lp, size);
 700 }
 701
 702 static HRESULT WINAPI ICMStream_fnSetInfo(IAVIStream *iface,
 703                                            LPAVISTREAMINFOW info, LONG infolen)
 704 {
 705   FIXME("(%p,%p,%d): stub\n", iface, info, infolen);
 706
 707   return E_FAIL;
 708 }
 709
 710 static const struct IAVIStreamVtbl iicmst = {
 711   ICMStream_fnQueryInterface,
 712   ICMStream_fnAddRef,
 713   ICMStream_fnRelease,
 714   ICMStream_fnCreate,
 715   ICMStream_fnInfo,
 716   ICMStream_fnFindSample,
 717   ICMStream_fnReadFormat,
 718   ICMStream_fnSetFormat,
 719   ICMStream_fnRead,
 720   ICMStream_fnWrite,
 721   ICMStream_fnDelete,
 722   ICMStream_fnReadData,
 723   ICMStream_fnWriteData,
 724   ICMStream_fnSetInfo
 725 };
 726
 727 HRESULT AVIFILE_CreateICMStream(REFIID riid, LPVOID *ppv)
 728 {
 729   IAVIStreamImpl *pstream;
 730   HRESULT         hr;
 731
 732   assert(riid != NULL && ppv != NULL);
 733
 734   *ppv = NULL;
 735
 736   pstream = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IAVIStreamImpl));
 737   if (pstream == NULL)
 738     return AVIERR_MEMORY;
 739
 740   pstream->IAVIStream_iface.lpVtbl = &iicmst;
 741   AVIFILE_Reset(pstream);
 742
 743   hr = IAVIStream_QueryInterface(&pstream->IAVIStream_iface, riid, ppv);
 744   if (FAILED(hr))
 745     HeapFree(GetProcessHeap(), 0, pstream);
 746
 747   return hr;
 748 }
 749
 750 /***********************************************************************/
 751
 752 static HRESULT AVIFILE_EncodeFrame(IAVIStreamImpl *This,
 753                                    LPBITMAPINFOHEADER lpbi, LPVOID lpBits)
 754 {
 755   DWORD dwMinQual, dwMaxQual, dwCurQual;
 756   DWORD dwRequest;
 757   DWORD icmFlags = 0;
 758   DWORD idxFlags = 0;
 759   BOOL  bDecreasedQual = FALSE;
 760   BOOL  doSizeCheck;
 761   BOOL  noPrev;
 762
 763   /* make lKeyFrameEvery and at start a keyframe */
 764   if ((This->lKeyFrameEvery != 0 &&
 765        (This->lCurrent - This->lLastKey) >= This->lKeyFrameEvery) ||
 766       This->lCurrent == This->sInfo.dwStart) {
 767     idxFlags = AVIIF_KEYFRAME;
 768     icmFlags = ICCOMPRESS_KEYFRAME;
 769   }
 770
 771   if (This->lKeyFrameEvery != 0) {
 772     if (This->lCurrent == This->sInfo.dwStart) {
 773       if (idxFlags & AVIIF_KEYFRAME) {
 774         /* allow keyframes to consume all unused bytes */
 775         dwRequest = This->dwBytesPerFrame + This->dwUnusedBytes;
 776         This->dwUnusedBytes = 0;
 777       } else {
 778         /* for non-keyframes only allow some of the unused bytes to be consumed */
 779         DWORD tmp1 = 0;
 780         DWORD tmp2;
 781
 782         if (This->dwBytesPerFrame >= This->dwUnusedBytes)
 783           tmp1 = This->dwBytesPerFrame / This->lKeyFrameEvery;
 784         tmp2 = (This->dwUnusedBytes + tmp1) / This->lKeyFrameEvery;
 785
 786         dwRequest = This->dwBytesPerFrame - tmp1 + tmp2;
 787         This->dwUnusedBytes -= tmp2;
 788       }
 789     } else
 790       dwRequest = MAX_FRAMESIZE;
 791   } else {
 792     /* only one keyframe at start desired */
 793     if (This->lCurrent == This->sInfo.dwStart) {
 794       dwRequest = This->dwBytesPerFrame + This->dwUnusedBytes;
 795       This->dwUnusedBytes = 0;
 796     } else
 797       dwRequest = MAX_FRAMESIZE;
 798   }
 799
 800   /* must we check for frame size to gain the requested
 801    * data rate or can we trust the codec? */
 802   doSizeCheck = (dwRequest != 0 && ((This->dwICMFlags & (VIDCF_CRUNCH|VIDCF_QUALITY)) == 0));
 803
 804   dwMaxQual = dwCurQual = This->sInfo.dwQuality;
 805   dwMinQual = ICQUALITY_LOW;
 806
 807   noPrev = TRUE;
 808   if ((icmFlags & ICCOMPRESS_KEYFRAME) == 0 &&
 809       (This->dwICMFlags & VIDCF_FASTTEMPORALC) == 0)
 810     noPrev = FALSE;
 811
 812   do {
 813     DWORD   idxCkid = 0;
 814     DWORD   res;
 815
 816     res = ICCompress(This->hic,icmFlags,This->lpbiCur,This->lpCur,lpbi,lpBits,
 817                      &idxCkid, &idxFlags, This->lCurrent, dwRequest, dwCurQual,
 818                      noPrev ? NULL:This->lpbiPrev, noPrev ? NULL:This->lpPrev);
 819     if (res == ICERR_NEWPALETTE) {
 820       FIXME(": codec has changed palette -- unhandled!\n");
 821     } else if (res != ICERR_OK)
 822       return AVIERR_COMPRESSOR;
 823
 824     /* need to check for framesize */
 825     if (! doSizeCheck)
 826       break;
 827
 828     if (dwRequest >= This->lpbiCur->biSizeImage) {
 829       /* frame is smaller -- try to maximize quality */
 830       if (dwMaxQual - dwCurQual > 10) {
 831         DWORD tmp = dwRequest / 8;
 832
 833         if (tmp < MAX_FRAMESIZE_DIFF)
 834           tmp = MAX_FRAMESIZE_DIFF;
 835
 836         if (tmp < dwRequest - This->lpbiCur->biSizeImage && bDecreasedQual) {
 837           tmp = dwCurQual;
 838           dwCurQual = (dwMinQual + dwMaxQual) / 2;
 839           dwMinQual = tmp;
 840           continue;
 841         }
 842       } else
 843         break;
 844     } else if (dwMaxQual - dwMinQual <= 1) {
 845       break;
 846     } else {
 847       dwMaxQual = dwCurQual;
 848
 849       if (bDecreasedQual || dwCurQual == This->dwLastQuality)
 850         dwCurQual = (dwMinQual + dwMaxQual) / 2;
 851       else
 852         FIXME(": no new quality computed min=%u cur=%u max=%u last=%u\n",
 853               dwMinQual, dwCurQual, dwMaxQual, This->dwLastQuality);
 854
 855       bDecreasedQual = TRUE;
 856     }
 857   } while (TRUE);
 858
 859   /* remember some values */
 860   This->dwLastQuality = dwCurQual;
 861   This->dwUnusedBytes = dwRequest - This->lpbiCur->biSizeImage;
 862   if (icmFlags & ICCOMPRESS_KEYFRAME)
 863     This->lLastKey = This->lCurrent;
 864
 865   /* Does we manage previous frame? */
 866   if (This->lpPrev != NULL && This->lKeyFrameEvery != 1)
 867     ICDecompress(This->hic, 0, This->lpbiCur, This->lpCur,
 868                  This->lpbiPrev, This->lpPrev);
 869
 870   return AVIERR_OK;
 871 }
 872
 873 static HRESULT AVIFILE_OpenGetFrame(IAVIStreamImpl *This)
 874 {
 875   LPBITMAPINFOHEADER lpbi;
 876   DWORD              size;
 877
 878   /* pre-conditions */
 879   assert(This != NULL);
 880   assert(This->pStream != NULL);
 881   assert(This->pg == NULL);
 882
 883   This->pg = AVIStreamGetFrameOpen(This->pStream, NULL);
 884   if (This->pg == NULL)
 885     return AVIERR_ERROR;
 886
 887   /* When we only decompress this is enough */
 888   if (This->sInfo.fccHandler == comptypeDIB)
 889     return AVIERR_OK;
 890
 891   assert(This->hic != NULL);
 892   assert(This->lpbiOutput == NULL);
 893
 894   /* get input format */
 895   lpbi = AVIStreamGetFrame(This->pg, This->sInfo.dwStart);
 896   if (lpbi == NULL)
 897     return AVIERR_MEMORY;
 898
 899   /* get memory for output format */
 900   size = ICCompressGetFormatSize(This->hic, lpbi);
 901   if ((LONG)size < (LONG)sizeof(BITMAPINFOHEADER))
 902     return AVIERR_COMPRESSOR;
 903   This->lpbiOutput = HeapAlloc(GetProcessHeap(), 0, size);
 904   if (This->lpbiOutput == NULL)
 905     return AVIERR_MEMORY;
 906   This->cbOutput = size;
 907
 908   if (ICCompressGetFormat(This->hic, lpbi, This->lpbiOutput) < S_OK)
 909     return AVIERR_BADFORMAT;
 910
 911   /* update AVISTREAMINFO structure */
 912   This->sInfo.rcFrame.right  =
 913     This->sInfo.rcFrame.left + This->lpbiOutput->biWidth;
 914   This->sInfo.rcFrame.bottom =
 915     This->sInfo.rcFrame.top  + This->lpbiOutput->biHeight;
 916   This->sInfo.dwSuggestedBufferSize =
 917     ICCompressGetSize(This->hic, lpbi, This->lpbiOutput);
 918
 919   /* prepare codec for compression */
 920   if (ICCompressBegin(This->hic, lpbi, This->lpbiOutput) != S_OK)
 921     return AVIERR_COMPRESSOR;
 922
 923   /* allocate memory for current frame */
 924   size += This->sInfo.dwSuggestedBufferSize;
 925   This->lpbiCur = HeapAlloc(GetProcessHeap(), 0, size);
 926   if (This->lpbiCur == NULL)
 927     return AVIERR_MEMORY;
 928   memcpy(This->lpbiCur, This->lpbiOutput, This->cbOutput);
 929   This->lpCur = DIBPTR(This->lpbiCur);
 930
 931   /* allocate memory for last frame if needed */
 932   if (This->lKeyFrameEvery != 1 &&
 933       (This->dwICMFlags & VIDCF_FASTTEMPORALC) == 0) {
 934     size = ICDecompressGetFormatSize(This->hic, This->lpbiOutput);
 935     This->lpbiPrev = HeapAlloc(GetProcessHeap(), 0, size);
 936     if (This->lpbiPrev == NULL)
 937       return AVIERR_MEMORY;
 938     if (ICDecompressGetFormat(This->hic, This->lpbiOutput, This->lpbiPrev) < S_OK)
 939       return AVIERR_COMPRESSOR;
 940
 941     if (This->lpbiPrev->biSizeImage == 0) {
 942       This->lpbiPrev->biSizeImage =
 943         DIBWIDTHBYTES(*This->lpbiPrev) * This->lpbiPrev->biHeight;
 944     }
 945
 946     /* get memory for format and picture */
 947     size += This->lpbiPrev->biSizeImage;
 948     This->lpbiPrev = HeapReAlloc(GetProcessHeap(), 0, This->lpbiPrev, size );
 949     if (This->lpbiPrev == NULL)
 950       return AVIERR_MEMORY;
 951     This->lpPrev = DIBPTR(This->lpbiPrev);
 952
 953     /* prepare codec also for decompression */
 954     if (ICDecompressBegin(This->hic,This->lpbiOutput,This->lpbiPrev) != S_OK)
 955       return AVIERR_COMPRESSOR;
 956   }
 957
 958   return AVIERR_OK;
 959 }