avifile.c 78.7 KB
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/*
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 * Copyright 1999 Marcus Meissner
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 * Copyright 2002-2003 Michael Gnnewig
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 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

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/* TODO:
 *  - IAVIStreaming interface is missing for the IAVIStreamImpl
 *  - IAVIStream_fnFindSample: FIND_INDEX isn't supported.
 *  - IAVIStream_fnReadFormat: formatchanges aren't read in.
 *  - IAVIStream_fnDelete: a stub.
 *  - IAVIStream_fnSetInfo: a stub.
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 *  - make thread safe
 *
 * KNOWN Bugs:
 *  - native version can hangup when reading a file generated with this DLL.
 *    When index is missing it works, but index seems to be okay.
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 */

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#define COM_NO_WINDOWS_H
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#include <assert.h>
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#include <stdarg.h>
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#include "windef.h"
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#include "winbase.h"
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#include "wingdi.h"
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#include "winuser.h"
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#include "winnls.h"
#include "winerror.h"
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#include "windowsx.h"
#include "mmsystem.h"
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#include "vfw.h"
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#include "avifile_private.h"
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#include "extrachunk.h"
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#include "wine/unicode.h"
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#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(avifile);

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#ifndef IDX_PER_BLOCK
#define IDX_PER_BLOCK 2730
#endif

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/***********************************************************************/

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static HRESULT WINAPI IAVIFile_fnQueryInterface(IAVIFile* iface,REFIID refiid,LPVOID *obj);
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static ULONG   WINAPI IAVIFile_fnAddRef(IAVIFile* iface);
static ULONG   WINAPI IAVIFile_fnRelease(IAVIFile* iface);
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static HRESULT WINAPI IAVIFile_fnInfo(IAVIFile*iface,AVIFILEINFOW*afi,LONG size);
static HRESULT WINAPI IAVIFile_fnGetStream(IAVIFile*iface,PAVISTREAM*avis,DWORD fccType,LONG lParam);
static HRESULT WINAPI IAVIFile_fnCreateStream(IAVIFile*iface,PAVISTREAM*avis,AVISTREAMINFOW*asi);
static HRESULT WINAPI IAVIFile_fnWriteData(IAVIFile*iface,DWORD ckid,LPVOID lpData,LONG size);
static HRESULT WINAPI IAVIFile_fnReadData(IAVIFile*iface,DWORD ckid,LPVOID lpData,LONG *size);
static HRESULT WINAPI IAVIFile_fnEndRecord(IAVIFile*iface);
static HRESULT WINAPI IAVIFile_fnDeleteStream(IAVIFile*iface,DWORD fccType,LONG lParam);

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static const struct IAVIFileVtbl iavift = {
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  IAVIFile_fnQueryInterface,
  IAVIFile_fnAddRef,
  IAVIFile_fnRelease,
  IAVIFile_fnInfo,
  IAVIFile_fnGetStream,
  IAVIFile_fnCreateStream,
  IAVIFile_fnWriteData,
  IAVIFile_fnReadData,
  IAVIFile_fnEndRecord,
  IAVIFile_fnDeleteStream
};

static HRESULT WINAPI IPersistFile_fnQueryInterface(IPersistFile*iface,REFIID refiid,LPVOID*obj);
static ULONG   WINAPI IPersistFile_fnAddRef(IPersistFile*iface);
static ULONG   WINAPI IPersistFile_fnRelease(IPersistFile*iface);
static HRESULT WINAPI IPersistFile_fnGetClassID(IPersistFile*iface,CLSID*pClassID);
static HRESULT WINAPI IPersistFile_fnIsDirty(IPersistFile*iface);
static HRESULT WINAPI IPersistFile_fnLoad(IPersistFile*iface,LPCOLESTR pszFileName,DWORD dwMode);
static HRESULT WINAPI IPersistFile_fnSave(IPersistFile*iface,LPCOLESTR pszFileName,BOOL fRemember);
static HRESULT WINAPI IPersistFile_fnSaveCompleted(IPersistFile*iface,LPCOLESTR pszFileName);
static HRESULT WINAPI IPersistFile_fnGetCurFile(IPersistFile*iface,LPOLESTR*ppszFileName);

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static const struct IPersistFileVtbl ipersistft = {
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  IPersistFile_fnQueryInterface,
  IPersistFile_fnAddRef,
  IPersistFile_fnRelease,
  IPersistFile_fnGetClassID,
  IPersistFile_fnIsDirty,
  IPersistFile_fnLoad,
  IPersistFile_fnSave,
  IPersistFile_fnSaveCompleted,
  IPersistFile_fnGetCurFile
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};

static HRESULT WINAPI IAVIStream_fnQueryInterface(IAVIStream*iface,REFIID refiid,LPVOID *obj);
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static ULONG   WINAPI IAVIStream_fnAddRef(IAVIStream*iface);
static ULONG   WINAPI IAVIStream_fnRelease(IAVIStream* iface);
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static HRESULT WINAPI IAVIStream_fnCreate(IAVIStream*iface,LPARAM lParam1,LPARAM lParam2);
static HRESULT WINAPI IAVIStream_fnInfo(IAVIStream*iface,AVISTREAMINFOW *psi,LONG size);
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static LONG    WINAPI IAVIStream_fnFindSample(IAVIStream*iface,LONG pos,LONG flags);
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static HRESULT WINAPI IAVIStream_fnReadFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG *formatsize);
static HRESULT WINAPI IAVIStream_fnSetFormat(IAVIStream*iface,LONG pos,LPVOID format,LONG formatsize);
static HRESULT WINAPI IAVIStream_fnRead(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,LONG *bytesread,LONG *samplesread);
static HRESULT WINAPI IAVIStream_fnWrite(IAVIStream*iface,LONG start,LONG samples,LPVOID buffer,LONG buffersize,DWORD flags,LONG *sampwritten,LONG *byteswritten);
static HRESULT WINAPI IAVIStream_fnDelete(IAVIStream*iface,LONG start,LONG samples);
static HRESULT WINAPI IAVIStream_fnReadData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG *lpread);
static HRESULT WINAPI IAVIStream_fnWriteData(IAVIStream*iface,DWORD fcc,LPVOID lp,LONG size);
static HRESULT WINAPI IAVIStream_fnSetInfo(IAVIStream*iface,AVISTREAMINFOW*info,LONG infolen);

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static const struct IAVIStreamVtbl iavist = {
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  IAVIStream_fnQueryInterface,
  IAVIStream_fnAddRef,
  IAVIStream_fnRelease,
  IAVIStream_fnCreate,
  IAVIStream_fnInfo,
  IAVIStream_fnFindSample,
  IAVIStream_fnReadFormat,
  IAVIStream_fnSetFormat,
  IAVIStream_fnRead,
  IAVIStream_fnWrite,
  IAVIStream_fnDelete,
  IAVIStream_fnReadData,
  IAVIStream_fnWriteData,
  IAVIStream_fnSetInfo
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};

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typedef struct _IAVIFileImpl IAVIFileImpl;

typedef struct _IPersistFileImpl {
  /* IUnknown stuff */
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  const IPersistFileVtbl *lpVtbl;
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  /* IPersistFile stuff */
  IAVIFileImpl     *paf;
} IPersistFileImpl;

typedef struct _IAVIStreamImpl {
  /* IUnknown stuff */
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  const IAVIStreamVtbl *lpVtbl;
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  LONG		    ref;
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  /* IAVIStream stuff */
  IAVIFileImpl     *paf;
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  DWORD             nStream;       /* the n-th stream in file */
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  AVISTREAMINFOW    sInfo;
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  LPVOID            lpFormat;
  DWORD             cbFormat;

  LPVOID            lpHandlerData;
  DWORD             cbHandlerData;

  EXTRACHUNKS       extra;

  LPDWORD           lpBuffer;
  DWORD             cbBuffer;       /* size of lpBuffer */
  DWORD             dwCurrentFrame; /* frame/block currently in lpBuffer */

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  LONG              lLastFrame;    /* last correct index in idxFrames */
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  AVIINDEXENTRY    *idxFrames;
  DWORD             nIdxFrames;     /* upper index limit of idxFrames */
  AVIINDEXENTRY    *idxFmtChanges;
  DWORD             nIdxFmtChanges; /* upper index limit of idxFmtChanges */
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} IAVIStreamImpl;

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struct _IAVIFileImpl {
  /* IUnknown stuff */
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  const IAVIFileVtbl     *lpVtbl;
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  LONG		    ref;
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  /* IAVIFile stuff... */
  IPersistFileImpl  iPersistFile;

  AVIFILEINFOW      fInfo;
  IAVIStreamImpl   *ppStreams[MAX_AVISTREAMS];

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  EXTRACHUNKS       fileextra;

  DWORD             dwMoviChunkPos;  /* some stuff for saving ... */
  DWORD             dwIdxChunkPos;
  DWORD             dwNextFramePos;
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  DWORD             dwInitialFrames;
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  MMCKINFO          ckLastRecord;
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  AVIINDEXENTRY    *idxRecords;      /* won't be updated while loading */
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  DWORD             nIdxRecords;     /* current fill level */
  DWORD             cbIdxRecords;    /* size of idxRecords */
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  /* IPersistFile stuff ... */
  HMMIO             hmmio;
  LPWSTR            szFileName;
  UINT              uMode;
  BOOL              fDirty;
};

/***********************************************************************/

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static HRESULT AVIFILE_AddFrame(IAVIStreamImpl *This, DWORD ckid, DWORD size,
				DWORD offset, DWORD flags);
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static HRESULT AVIFILE_AddRecord(IAVIFileImpl *This);
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static DWORD   AVIFILE_ComputeMoviStart(IAVIFileImpl *This);
static void    AVIFILE_ConstructAVIStream(IAVIFileImpl *paf, DWORD nr,
					  LPAVISTREAMINFOW asi);
static void    AVIFILE_DestructAVIStream(IAVIStreamImpl *This);
static HRESULT AVIFILE_LoadFile(IAVIFileImpl *This);
static HRESULT AVIFILE_LoadIndex(IAVIFileImpl *This, DWORD size, DWORD offset);
static HRESULT AVIFILE_ParseIndex(IAVIFileImpl *This, AVIINDEXENTRY *lp,
				  LONG count, DWORD pos, BOOL *bAbsolute);
static HRESULT AVIFILE_ReadBlock(IAVIStreamImpl *This, DWORD start,
				 LPVOID buffer, LONG size);
static void    AVIFILE_SamplesToBlock(IAVIStreamImpl *This, LPLONG pos,
				      LPLONG offset);
static HRESULT AVIFILE_SaveFile(IAVIFileImpl *This);
static HRESULT AVIFILE_SaveIndex(IAVIFileImpl *This);
static ULONG   AVIFILE_SearchStream(IAVIFileImpl *This, DWORD fccType,
				    LONG lSkip);
static void    AVIFILE_UpdateInfo(IAVIFileImpl *This);
static HRESULT AVIFILE_WriteBlock(IAVIStreamImpl *This, DWORD block,
				  FOURCC ckid, DWORD flags, LPVOID buffer,
				  LONG size);

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HRESULT AVIFILE_CreateAVIFile(REFIID riid, LPVOID *ppv)
{
  IAVIFileImpl *pfile;
  HRESULT       hr;

  assert(riid != NULL && ppv != NULL);

  *ppv = NULL;

  pfile = (IAVIFileImpl*)LocalAlloc(LPTR, sizeof(IAVIFileImpl));
  if (pfile == NULL)
    return AVIERR_MEMORY;

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  pfile->lpVtbl = &iavift;
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  pfile->ref = 0;
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  pfile->iPersistFile.lpVtbl = &ipersistft;
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  pfile->iPersistFile.paf = pfile;

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  hr = IAVIFile_QueryInterface((IAVIFile*)pfile, riid, ppv);
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  if (FAILED(hr))
    LocalFree((HLOCAL)pfile);

  return hr;
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}

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static HRESULT WINAPI IAVIFile_fnQueryInterface(IAVIFile *iface, REFIID refiid,
						LPVOID *obj)
{
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  IAVIFileImpl *This = (IAVIFileImpl *)iface;
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  TRACE("(%p,%s,%p)\n", This, debugstr_guid(refiid), obj);
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  if (IsEqualGUID(&IID_IUnknown, refiid) ||
      IsEqualGUID(&IID_IAVIFile, refiid)) {
    *obj = iface;
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    IAVIFile_AddRef(iface);

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    return S_OK;
  } else if (IsEqualGUID(&IID_IPersistFile, refiid)) {
    *obj = &This->iPersistFile;
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    IAVIFile_AddRef(iface);

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    return S_OK;
  }
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  return OLE_E_ENUM_NOMORE;
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}

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static ULONG WINAPI IAVIFile_fnAddRef(IAVIFile *iface)
{
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  IAVIFileImpl *This = (IAVIFileImpl *)iface;
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  ULONG ref = InterlockedIncrement(&This->ref);
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  TRACE("(%p) -> %ld\n", iface, ref);

  return ref;
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}

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static ULONG WINAPI IAVIFile_fnRelease(IAVIFile *iface)
{
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  IAVIFileImpl *This = (IAVIFileImpl *)iface;
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  UINT i;
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  ULONG ref = InterlockedDecrement(&This->ref);
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  TRACE("(%p) -> %ld\n", iface, ref);
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  if (!ref) {
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    if (This->fDirty) {
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      /* need to write headers to file */
      AVIFILE_SaveFile(This);
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    }
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    for (i = 0; i < This->fInfo.dwStreams; i++) {
      if (This->ppStreams[i] != NULL) {
	if (This->ppStreams[i]->ref != 0) {
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	  ERR(": someone has still %lu reference to stream %u (%p)!\n",
	       This->ppStreams[i]->ref, i, This->ppStreams[i]);
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	}
	AVIFILE_DestructAVIStream(This->ppStreams[i]);
	LocalFree((HLOCAL)This->ppStreams[i]);
	This->ppStreams[i] = NULL;
      }
    }

    if (This->idxRecords != NULL) {
      GlobalFreePtr(This->idxRecords);
      This->idxRecords  = NULL;
      This->nIdxRecords = 0;
    }

    if (This->fileextra.lp != NULL) {
      GlobalFreePtr(This->fileextra.lp);
      This->fileextra.lp = NULL;
      This->fileextra.cb = 0;
    }

    if (This->szFileName != NULL) {
      LocalFree((HLOCAL)This->szFileName);
      This->szFileName = NULL;
    }
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    if (This->hmmio != NULL) {
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      mmioClose(This->hmmio, 0);
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      This->hmmio = NULL;
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    }

    LocalFree((HLOCAL)This);
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  }
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  return ref;
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}

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static HRESULT WINAPI IAVIFile_fnInfo(IAVIFile *iface, LPAVIFILEINFOW afi,
				      LONG size)
{
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  IAVIFileImpl *This = (IAVIFileImpl *)iface;
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  TRACE("(%p,%p,%ld)\n",iface,afi,size);

  if (afi == NULL)
    return AVIERR_BADPARAM;
  if (size < 0)
    return AVIERR_BADSIZE;

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  AVIFILE_UpdateInfo(This);

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  memcpy(afi, &This->fInfo, min((DWORD)size, sizeof(This->fInfo)));
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  if ((DWORD)size < sizeof(This->fInfo))
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    return AVIERR_BUFFERTOOSMALL;
  return AVIERR_OK;
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}

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static HRESULT WINAPI IAVIFile_fnGetStream(IAVIFile *iface, PAVISTREAM *avis,
					   DWORD fccType, LONG lParam)
{
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  IAVIFileImpl *This = (IAVIFileImpl *)iface;
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  ULONG nStream;

  TRACE("(%p,%p,0x%08lX,%ld)\n", iface, avis, fccType, lParam);

  if (avis == NULL || lParam < 0)
    return AVIERR_BADPARAM;

  nStream = AVIFILE_SearchStream(This, fccType, lParam);

  /* Does the requested stream exist? */
  if (nStream < This->fInfo.dwStreams &&
      This->ppStreams[nStream] != NULL) {
    *avis = (PAVISTREAM)This->ppStreams[nStream];
    IAVIStream_AddRef(*avis);

    return AVIERR_OK;
  }

  /* Sorry, but the specified stream doesn't exist */
  return AVIERR_NODATA;
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}

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static HRESULT WINAPI IAVIFile_fnCreateStream(IAVIFile *iface,PAVISTREAM *avis,
					      LPAVISTREAMINFOW asi)
{
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  IAVIFileImpl *This = (IAVIFileImpl *)iface;
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  DWORD n;
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  TRACE("(%p,%p,%p)\n", iface, avis, asi);

  /* check parameters */
  if (avis == NULL || asi == NULL)
    return AVIERR_BADPARAM;

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  *avis = NULL;

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  /* Does the user have write permission? */
  if ((This->uMode & MMIO_RWMODE) == 0)
    return AVIERR_READONLY;

  /* Can we add another stream? */
  n = This->fInfo.dwStreams;
  if (n >= MAX_AVISTREAMS || This->dwMoviChunkPos != 0) {
    /* already reached max nr of streams
     * or have already written frames to disk */
    return AVIERR_UNSUPPORTED;
  }

  /* check AVISTREAMINFO for some really needed things */
  if (asi->fccType == 0 || asi->dwScale == 0 || asi->dwRate == 0)
    return AVIERR_BADFORMAT;

  /* now it seems to be save to add the stream */
  assert(This->ppStreams[n] == NULL);
  This->ppStreams[n] = (IAVIStreamImpl*)LocalAlloc(LPTR,
						   sizeof(IAVIStreamImpl));
  if (This->ppStreams[n] == NULL)
    return AVIERR_MEMORY;

  /* initialize the new allocated stream */
  AVIFILE_ConstructAVIStream(This, n, asi);

  This->fInfo.dwStreams++;
  This->fDirty = TRUE;

  /* update our AVIFILEINFO structure */
  AVIFILE_UpdateInfo(This);

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  /* return it */
  *avis = (PAVISTREAM)This->ppStreams[n];
  IAVIStream_AddRef(*avis);

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  return AVIERR_OK;
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}

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static HRESULT WINAPI IAVIFile_fnWriteData(IAVIFile *iface, DWORD ckid,
					   LPVOID lpData, LONG size)
{
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  IAVIFileImpl *This = (IAVIFileImpl *)iface;
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  TRACE("(%p,0x%08lX,%p,%ld)\n", iface, ckid, lpData, size);

  /* check parameters */
  if (lpData == NULL)
    return AVIERR_BADPARAM;
  if (size < 0)
    return AVIERR_BADSIZE;

  /* Do we have write permission? */
  if ((This->uMode & MMIO_RWMODE) == 0)
    return AVIERR_READONLY;

  This->fDirty = TRUE;

  return WriteExtraChunk(&This->fileextra, ckid, lpData, size);
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}

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static HRESULT WINAPI IAVIFile_fnReadData(IAVIFile *iface, DWORD ckid,
					  LPVOID lpData, LONG *size)
{
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  IAVIFileImpl *This = (IAVIFileImpl *)iface;
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  TRACE("(%p,0x%08lX,%p,%p)\n", iface, ckid, lpData, size);

  return ReadExtraChunk(&This->fileextra, ckid, lpData, size);
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}

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static HRESULT WINAPI IAVIFile_fnEndRecord(IAVIFile *iface)
{
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  IAVIFileImpl *This = (IAVIFileImpl *)iface;
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  TRACE("(%p)\n",iface);
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  if ((This->uMode & MMIO_RWMODE) == 0)
    return AVIERR_READONLY;

  This->fDirty = TRUE;

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  /* no frames written to any stream? -- compute start of 'movi'-chunk */
  if (This->dwMoviChunkPos == 0)
    AVIFILE_ComputeMoviStart(This);
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  This->fInfo.dwFlags  |= AVIFILEINFO_ISINTERLEAVED;

  /* already written frames to any stream, ... */
  if (This->ckLastRecord.dwFlags & MMIO_DIRTY) {
    /* close last record */
    if (mmioAscend(This->hmmio, &This->ckLastRecord, 0) != 0)
      return AVIERR_FILEWRITE;

    AVIFILE_AddRecord(This);

    if (This->fInfo.dwSuggestedBufferSize < This->ckLastRecord.cksize + 3 * sizeof(DWORD))
      This->fInfo.dwSuggestedBufferSize = This->ckLastRecord.cksize + 3 * sizeof(DWORD);
  }

  /* write out a new record into file, but don't close it */
  This->ckLastRecord.cksize  = 0;
  This->ckLastRecord.fccType = listtypeAVIRECORD;
  if (mmioSeek(This->hmmio, This->dwNextFramePos, SEEK_SET) == -1)
    return AVIERR_FILEWRITE;
  if (mmioCreateChunk(This->hmmio, &This->ckLastRecord, MMIO_CREATELIST) != 0)
    return AVIERR_FILEWRITE;
  This->dwNextFramePos += 3 * sizeof(DWORD);

  return AVIERR_OK;
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}

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static HRESULT WINAPI IAVIFile_fnDeleteStream(IAVIFile *iface, DWORD fccType,
					      LONG lParam)
{
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  IAVIFileImpl *This = (IAVIFileImpl *)iface;
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  ULONG nStream;

  TRACE("(%p,0x%08lX,%ld)\n", iface, fccType, lParam);

  /* check parameter */
  if (lParam < 0)
    return AVIERR_BADPARAM;

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  /* Have user write permissions? */
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  if ((This->uMode & MMIO_RWMODE) == 0)
    return AVIERR_READONLY;

  nStream = AVIFILE_SearchStream(This, fccType, lParam);

  /* Does the requested stream exist? */
  if (nStream < This->fInfo.dwStreams &&
      This->ppStreams[nStream] != NULL) {
    /* ... so delete it now */
    LocalFree((HLOCAL)This->ppStreams[nStream]);

    if (This->fInfo.dwStreams - nStream > 0)
      memcpy(This->ppStreams + nStream, This->ppStreams + nStream + 1,
	     (This->fInfo.dwStreams - nStream) * sizeof(IAVIStreamImpl*));

    This->ppStreams[This->fInfo.dwStreams] = NULL;
    This->fInfo.dwStreams--;
    This->fDirty = TRUE;

    /* This->fInfo will be updated further when asked for */
    return AVIERR_OK;
  } else
    return AVIERR_NODATA;
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}

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/***********************************************************************/
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static HRESULT WINAPI IPersistFile_fnQueryInterface(IPersistFile *iface,
						    REFIID refiid, LPVOID *obj)
{
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  IPersistFileImpl *This = (IPersistFileImpl *)iface;
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  assert(This->paf != NULL);
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  return IAVIFile_QueryInterface((PAVIFILE)This->paf, refiid, obj);
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}

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static ULONG   WINAPI IPersistFile_fnAddRef(IPersistFile *iface)
{
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  IPersistFileImpl *This = (IPersistFileImpl *)iface;
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  assert(This->paf != NULL);
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  return IAVIFile_AddRef((PAVIFILE)This->paf);
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}

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static ULONG   WINAPI IPersistFile_fnRelease(IPersistFile *iface)
{
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  IPersistFileImpl *This = (IPersistFileImpl *)iface;
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  assert(This->paf != NULL);
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  return IAVIFile_Release((PAVIFILE)This->paf);
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}

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static HRESULT WINAPI IPersistFile_fnGetClassID(IPersistFile *iface,
						LPCLSID pClassID)
{
  TRACE("(%p,%p)\n", iface, pClassID);
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  if (pClassID == NULL)
    return AVIERR_BADPARAM;

  memcpy(pClassID, &CLSID_AVIFile, sizeof(CLSID_AVIFile));
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  return AVIERR_OK;
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}

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static HRESULT WINAPI IPersistFile_fnIsDirty(IPersistFile *iface)
{
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  IPersistFileImpl *This = (IPersistFileImpl *)iface;
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  TRACE("(%p)\n", iface);
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  assert(This->paf != NULL);

  return (This->paf->fDirty ? S_OK : S_FALSE);
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}

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static HRESULT WINAPI IPersistFile_fnLoad(IPersistFile *iface,
					  LPCOLESTR pszFileName, DWORD dwMode)
{
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  IPersistFileImpl *This = (IPersistFileImpl *)iface;
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  int len;

  TRACE("(%p,%s,0x%08lX)\n", iface, debugstr_w(pszFileName), dwMode);

  /* check parameter */
  if (pszFileName == NULL)
    return AVIERR_BADPARAM;
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  assert(This->paf != NULL);
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  if (This->paf->hmmio != NULL)
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    return AVIERR_ERROR; /* No reuse of this object for another file! */

  /* remeber mode and name */
  This->paf->uMode = dwMode;
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  len = lstrlenW(pszFileName) + 1;
  This->paf->szFileName = (LPWSTR)LocalAlloc(LPTR, len * sizeof(WCHAR));
  if (This->paf->szFileName == NULL)
    return AVIERR_MEMORY;
  lstrcpyW(This->paf->szFileName, pszFileName);

  /* try to open the file */
  This->paf->hmmio = mmioOpenW(This->paf->szFileName, NULL,
			       MMIO_ALLOCBUF | dwMode);
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  if (This->paf->hmmio == NULL) {
    /* mmioOpenW not in native DLLs of Win9x -- try mmioOpenA */
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    LPSTR szFileName;

    len = WideCharToMultiByte(CP_ACP, 0, This->paf->szFileName, -1,
                               NULL, 0, NULL, NULL);
    szFileName = LocalAlloc(LPTR, len * sizeof(CHAR));
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    if (szFileName == NULL)
      return AVIERR_MEMORY;

    WideCharToMultiByte(CP_ACP, 0, This->paf->szFileName, -1, szFileName,
			len, NULL, NULL);

    This->paf->hmmio = mmioOpenA(szFileName, NULL, MMIO_ALLOCBUF | dwMode);
    LocalFree((HLOCAL)szFileName);
    if (This->paf->hmmio == NULL)
      return AVIERR_FILEOPEN;
  }
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  /* should we create a new file? */
  if (dwMode & OF_CREATE) {
    memset(& This->paf->fInfo, 0, sizeof(This->paf->fInfo));
    This->paf->fInfo.dwFlags = AVIFILEINFO_HASINDEX | AVIFILEINFO_TRUSTCKTYPE;

    return AVIERR_OK;
  } else
    return AVIFILE_LoadFile(This->paf);
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}

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static HRESULT WINAPI IPersistFile_fnSave(IPersistFile *iface,
					  LPCOLESTR pszFileName,BOOL fRemember)
{
  TRACE("(%p,%s,%d)\n", iface, debugstr_w(pszFileName), fRemember);
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  /* We write directly to disk, so nothing to do. */

  return AVIERR_OK;
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}

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static HRESULT WINAPI IPersistFile_fnSaveCompleted(IPersistFile *iface,
						   LPCOLESTR pszFileName)
{
  TRACE("(%p,%s)\n", iface, debugstr_w(pszFileName));

  /* We write directly to disk, so nothing to do. */

  return AVIERR_OK;
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}

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static HRESULT WINAPI IPersistFile_fnGetCurFile(IPersistFile *iface,
						LPOLESTR *ppszFileName)
{
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  IPersistFileImpl *This = (IPersistFileImpl *)iface;
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  TRACE("(%p,%p)\n", iface, ppszFileName);

  if (ppszFileName == NULL)
    return AVIERR_BADPARAM;

  *ppszFileName = NULL;

  assert(This->paf != NULL);

  if (This->paf->szFileName != NULL) {
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    int len = lstrlenW(This->paf->szFileName) + 1;
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    *ppszFileName = (LPOLESTR)GlobalAllocPtr(GHND, len * sizeof(WCHAR));
    if (*ppszFileName == NULL)
      return AVIERR_MEMORY;

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    strcpyW(*ppszFileName, This->paf->szFileName);
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  }

  return AVIERR_OK;
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}

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/***********************************************************************/

static HRESULT WINAPI IAVIStream_fnQueryInterface(IAVIStream *iface,
						  REFIID refiid, LPVOID *obj)
{
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  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
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  TRACE("(%p,%s,%p)\n", iface, debugstr_guid(refiid), obj);

  if (IsEqualGUID(&IID_IUnknown, refiid) ||
      IsEqualGUID(&IID_IAVIStream, refiid)) {
    *obj = This;
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    IAVIStream_AddRef(iface);

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    return S_OK;
  }
  /* FIXME: IAVIStreaming interface */

  return OLE_E_ENUM_NOMORE;
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}

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static ULONG WINAPI IAVIStream_fnAddRef(IAVIStream *iface)
{
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  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
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  ULONG ref = InterlockedIncrement(&This->ref);
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  TRACE("(%p) -> %ld\n", iface, ref);
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  /* also add ref to parent, so that it doesn't kill us */
  if (This->paf != NULL)
    IAVIFile_AddRef((PAVIFILE)This->paf);

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  return ref;
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}

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static ULONG WINAPI IAVIStream_fnRelease(IAVIStream* iface)
{
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  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
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  ULONG ref = InterlockedDecrement(&This->ref);
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  TRACE("(%p) -> %ld\n", iface, ref);
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  if (This->paf != NULL)
    IAVIFile_Release((PAVIFILE)This->paf);

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  return ref;
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}

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static HRESULT WINAPI IAVIStream_fnCreate(IAVIStream *iface, LPARAM lParam1,
					  LPARAM lParam2)
{
  TRACE("(%p,0x%08lX,0x%08lX)\n", iface, lParam1, lParam2);

  /* This IAVIStream interface needs an AVIFile */
  return AVIERR_UNSUPPORTED;
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}

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static HRESULT WINAPI IAVIStream_fnInfo(IAVIStream *iface,LPAVISTREAMINFOW psi,
					LONG size)
{
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  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
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  TRACE("(%p,%p,%ld)\n", iface, psi, size);

  if (psi == NULL)
    return AVIERR_BADPARAM;
  if (size < 0)
    return AVIERR_BADSIZE;

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  memcpy(psi, &This->sInfo, min((DWORD)size, sizeof(This->sInfo)));
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788
  if ((DWORD)size < sizeof(This->sInfo))
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    return AVIERR_BUFFERTOOSMALL;
  return AVIERR_OK;
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}

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static LONG WINAPI IAVIStream_fnFindSample(IAVIStream *iface, LONG pos,
					   LONG flags)
{
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  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
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  LONG offset = 0;

  TRACE("(%p,%ld,0x%08lX)\n",iface,pos,flags);

  if (flags & FIND_FROM_START) {
    pos = This->sInfo.dwStart;
    flags &= ~(FIND_FROM_START|FIND_PREV);
    flags |= FIND_NEXT;
  }

  if (This->sInfo.dwSampleSize != 0) {
    /* convert samples into block number with offset */
    AVIFILE_SamplesToBlock(This, &pos, &offset);
  }

  if (flags & FIND_TYPE) {
    if (flags & FIND_KEY) {
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      while (0 <= pos && pos <= This->lLastFrame) {
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	if (This->idxFrames[pos].dwFlags & AVIIF_KEYFRAME)
	  goto RETURN_FOUND;

	if (flags & FIND_NEXT)
	  pos++;
	else
	  pos--;
      };
    } else if (flags & FIND_ANY) {
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      while (0 <= pos && pos <= This->lLastFrame) {
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	if (This->idxFrames[pos].dwChunkLength > 0)
	  goto RETURN_FOUND;

	if (flags & FIND_NEXT)
	  pos++;
	else
	  pos--;

      };
    } else if ((flags & FIND_FORMAT) && This->idxFmtChanges != NULL &&
	       This->sInfo.fccType == streamtypeVIDEO) {
      if (flags & FIND_NEXT) {
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	ULONG n;

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	for (n = 0; n < This->sInfo.dwFormatChangeCount; n++)
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	  if (This->idxFmtChanges[n].ckid >= pos) {
            pos = This->idxFmtChanges[n].ckid;
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	    goto RETURN_FOUND;
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          }
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      } else {
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	LONG n;

	for (n = (LONG)This->sInfo.dwFormatChangeCount; n >= 0; n--) {
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	  if (This->idxFmtChanges[n].ckid <= pos) {
            pos = This->idxFmtChanges[n].ckid;
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	    goto RETURN_FOUND;
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          }
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	}

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	if (pos > (LONG)This->sInfo.dwStart)
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	  return 0; /* format changes always for first frame */
      }
    }

    return -1;
  }

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 RETURN_FOUND:
  if (pos < (LONG)This->sInfo.dwStart)
    return -1;
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  switch (flags & FIND_RET) {
  case FIND_LENGTH:
    /* physical size */
    pos = This->idxFrames[pos].dwChunkLength;
    break;
  case FIND_OFFSET:
    /* physical position */
    pos = This->idxFrames[pos].dwChunkOffset + 2 * sizeof(DWORD)
      + offset * This->sInfo.dwSampleSize;
    break;
  case FIND_SIZE:
    /* logical size */
    if (This->sInfo.dwSampleSize)
      pos = This->sInfo.dwSampleSize;
    else
      pos = 1;
    break;
  case FIND_INDEX:
    FIXME(": FIND_INDEX flag is not supported!\n");
    /* This is an index in the index-table on disc. */
    break;
  }; /* else logical position */

  return pos;
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}

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static HRESULT WINAPI IAVIStream_fnReadFormat(IAVIStream *iface, LONG pos,
					      LPVOID format, LONG *formatsize)
{
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  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
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  TRACE("(%p,%ld,%p,%p)\n", iface, pos, format, formatsize);

  if (formatsize == NULL)
    return AVIERR_BADPARAM;

  /* only interested in needed buffersize? */
  if (format == NULL || *formatsize <= 0) {
    *formatsize = This->cbFormat;

    return AVIERR_OK;
  }

  /* copy initial format (only as much as will fit) */
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  memcpy(format, This->lpFormat, min(*(DWORD*)formatsize, This->cbFormat));
  if (*(DWORD*)formatsize < This->cbFormat) {
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    *formatsize = This->cbFormat;
    return AVIERR_BUFFERTOOSMALL;
  }

  /* Could format change? When yes will it change? */
  if ((This->sInfo.dwFlags & AVISTREAMINFO_FORMATCHANGES) &&
      pos > This->sInfo.dwStart) {
    LONG lLastFmt;

    lLastFmt = IAVIStream_fnFindSample(iface, pos, FIND_FORMAT|FIND_PREV);
    if (lLastFmt > 0) {
      FIXME(": need to read formatchange for %ld -- unimplemented!\n",lLastFmt);
    }
  }

  *formatsize = This->cbFormat;
  return AVIERR_OK;
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}

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static HRESULT WINAPI IAVIStream_fnSetFormat(IAVIStream *iface, LONG pos,
					     LPVOID format, LONG formatsize)
{
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  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
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  LPBITMAPINFOHEADER lpbiNew = (LPBITMAPINFOHEADER)format;
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  TRACE("(%p,%ld,%p,%ld)\n", iface, pos, format, formatsize);

  /* check parameters */
  if (format == NULL || formatsize <= 0)
    return AVIERR_BADPARAM;

  /* Do we have write permission? */
  if ((This->paf->uMode & MMIO_RWMODE) == 0)
    return AVIERR_READONLY;

  /* can only set format before frame is written! */
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  if (This->lLastFrame > pos)
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    return AVIERR_UNSUPPORTED;

  /* initial format or a formatchange? */
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  if (This->lpFormat == NULL) {
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    /* initial format */
    if (This->paf->dwMoviChunkPos != 0)
      return AVIERR_ERROR; /* user has used API in wrong sequnece! */

    This->lpFormat = GlobalAllocPtr(GMEM_MOVEABLE, formatsize);
    if (This->lpFormat == NULL)
      return AVIERR_MEMORY;
    This->cbFormat = formatsize;

    memcpy(This->lpFormat, format, formatsize);

    /* update some infos about stream */
    if (This->sInfo.fccType == streamtypeVIDEO) {
      LONG lDim;

      lDim = This->sInfo.rcFrame.right - This->sInfo.rcFrame.left;
      if (lDim < lpbiNew->biWidth)
	This->sInfo.rcFrame.right = This->sInfo.rcFrame.left + lpbiNew->biWidth;
      lDim = This->sInfo.rcFrame.bottom - This->sInfo.rcFrame.top;
      if (lDim < lpbiNew->biHeight)
	This->sInfo.rcFrame.bottom = This->sInfo.rcFrame.top + lpbiNew->biHeight;
    } else if (This->sInfo.fccType == streamtypeAUDIO)
      This->sInfo.dwSampleSize = ((LPWAVEFORMATEX)This->lpFormat)->nBlockAlign;

    return AVIERR_OK;
  } else {
    MMCKINFO           ck;
    LPBITMAPINFOHEADER lpbiOld = (LPBITMAPINFOHEADER)This->lpFormat;
    RGBQUAD           *rgbNew  = (RGBQUAD*)((LPBYTE)lpbiNew + lpbiNew->biSize);
    AVIPALCHANGE      *lppc = NULL;
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    UINT               n;
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    /* perhaps format change, check it ... */
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    if (This->cbFormat != formatsize)
      return AVIERR_UNSUPPORTED;

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    /* no format change, only the initial one */
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    if (memcmp(This->lpFormat, format, formatsize) == 0)
      return AVIERR_OK;

    /* check that's only the palette, which changes */
    if (lpbiOld->biSize        != lpbiNew->biSize ||
	lpbiOld->biWidth       != lpbiNew->biWidth ||
	lpbiOld->biHeight      != lpbiNew->biHeight ||
	lpbiOld->biPlanes      != lpbiNew->biPlanes ||
	lpbiOld->biBitCount    != lpbiNew->biBitCount ||
	lpbiOld->biCompression != lpbiNew->biCompression ||
	lpbiOld->biClrUsed     != lpbiNew->biClrUsed)
      return AVIERR_UNSUPPORTED;

    This->sInfo.dwFlags |= AVISTREAMINFO_FORMATCHANGES;

    /* simply say all colors have changed */
    ck.ckid   = MAKEAVICKID(cktypePALchange, This->nStream);
    ck.cksize = 2 * sizeof(WORD) + lpbiOld->biClrUsed * sizeof(PALETTEENTRY);
    lppc = (AVIPALCHANGE*)GlobalAllocPtr(GMEM_MOVEABLE, ck.cksize);
    if (lppc == NULL)
      return AVIERR_MEMORY;

    lppc->bFirstEntry = 0;
    lppc->bNumEntries = (lpbiOld->biClrUsed < 256 ? lpbiOld->biClrUsed : 0);
    lppc->wFlags      = 0;
    for (n = 0; n < lpbiOld->biClrUsed; n++) {
      lppc->peNew[n].peRed   = rgbNew[n].rgbRed;
      lppc->peNew[n].peGreen = rgbNew[n].rgbGreen;
      lppc->peNew[n].peBlue  = rgbNew[n].rgbBlue;
      lppc->peNew[n].peFlags = 0;
    }

    if (mmioSeek(This->paf->hmmio, This->paf->dwNextFramePos, SEEK_SET) == -1)
      return AVIERR_FILEWRITE;
    if (mmioCreateChunk(This->paf->hmmio, &ck, 0) != S_OK)
      return AVIERR_FILEWRITE;
    if (mmioWrite(This->paf->hmmio, (HPSTR)lppc, ck.cksize) != ck.cksize)
      return AVIERR_FILEWRITE;
    if (mmioAscend(This->paf->hmmio, &ck, 0) != S_OK)
      return AVIERR_FILEWRITE;
    This->paf->dwNextFramePos += ck.cksize + 2 * sizeof(DWORD);

    GlobalFreePtr(lppc);

    return AVIFILE_AddFrame(This, cktypePALchange, n, ck.dwDataOffset, 0);
  }
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}

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static HRESULT WINAPI IAVIStream_fnRead(IAVIStream *iface, LONG start,
					LONG samples, LPVOID buffer,
					LONG buffersize, LPLONG bytesread,
					LPLONG samplesread)
{
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  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
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  DWORD    size;
  HRESULT  hr;
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  TRACE("(%p,%ld,%ld,%p,%ld,%p,%p)\n", iface, start, samples, buffer,
 	buffersize, bytesread, samplesread);

  /* clear return parameters if given */
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  if (bytesread != NULL)
    *bytesread = 0;
  if (samplesread != NULL)
    *samplesread = 0;

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  /* check parameters */
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  if ((LONG)This->sInfo.dwStart > start)
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    return AVIERR_NODATA; /* couldn't read before start of stream */
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  if (This->sInfo.dwStart + This->sInfo.dwLength < (DWORD)start)
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    return AVIERR_NODATA; /* start is past end of stream */

  /* should we read as much as possible? */
  if (samples == -1) {
    /* User should know how much we have read */
    if (bytesread == NULL && samplesread == NULL)
      return AVIERR_BADPARAM;

    if (This->sInfo.dwSampleSize != 0)
      samples = buffersize / This->sInfo.dwSampleSize;
    else
      samples = 1;
  }

  /* limit to end of stream */
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  if ((LONG)This->sInfo.dwLength < samples)
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    samples = This->sInfo.dwLength;
  if ((start - This->sInfo.dwStart) > (This->sInfo.dwLength - samples))
    samples = This->sInfo.dwLength - (start - This->sInfo.dwStart);

  /* nothing to read? Then leave ... */
  if (samples == 0)
    return AVIERR_OK;

  if (This->sInfo.dwSampleSize != 0) {
    /* fixed samplesize -- we can read over frame/block boundaries */
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Mike McCormack committed
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    LONG block = start;
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    LONG offset = 0;

    /* convert start sample to block,offset pair */
    AVIFILE_SamplesToBlock(This, &block, &offset);

    /* convert samples to bytes */
    samples *= This->sInfo.dwSampleSize;

    while (samples > 0 && buffersize > 0) {
      if (block != This->dwCurrentFrame) {
	hr = AVIFILE_ReadBlock(This, block, NULL, 0);
	if (FAILED(hr))
	  return hr;
      }

      size = min((DWORD)samples, (DWORD)buffersize);
      size = min(size, This->cbBuffer - offset);
      memcpy(buffer, ((BYTE*)&This->lpBuffer[2]) + offset, size);

      block++;
      offset = 0;
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      buffer = ((LPBYTE)buffer)+size;
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      samples    -= size;
      buffersize -= size;

      /* fill out return parameters if given */
      if (bytesread != NULL)
	*bytesread   += size;
      if (samplesread != NULL)
	*samplesread += size / This->sInfo.dwSampleSize;
    }

    if (samples == 0)
      return AVIERR_OK;
    else
      return AVIERR_BUFFERTOOSMALL;
  } else {
    /* variable samplesize -- we can only read one full frame/block */
    if (samples > 1)
      samples = 1;

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    assert(start <= This->lLastFrame);
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    size = This->idxFrames[start].dwChunkLength;
    if (buffer != NULL && buffersize >= size) {
      hr = AVIFILE_ReadBlock(This, start, buffer, size);
      if (FAILED(hr))
	return hr;
    } else if (buffer != NULL)
      return AVIERR_BUFFERTOOSMALL;

    /* fill out return parameters if given */
    if (bytesread != NULL)
      *bytesread = size;
    if (samplesread != NULL)
      *samplesread = samples;

    return AVIERR_OK;
  }
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}

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static HRESULT WINAPI IAVIStream_fnWrite(IAVIStream *iface, LONG start,
					 LONG samples, LPVOID buffer,
					 LONG buffersize, DWORD flags,
					 LPLONG sampwritten,
					 LPLONG byteswritten)
{
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  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
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  FOURCC  ckid;
  HRESULT hr;

  TRACE("(%p,%ld,%ld,%p,%ld,0x%08lX,%p,%p)\n", iface, start, samples,
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	buffer, buffersize, flags, sampwritten, byteswritten);

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  /* clear return parameters if given */
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  if (sampwritten != NULL)
    *sampwritten = 0;
  if (byteswritten != NULL)
    *byteswritten = 0;

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  /* check parameters */
  if (buffer == NULL && (buffersize > 0 || samples > 0))
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    return AVIERR_BADPARAM;

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  /* Have we write permission? */
  if ((This->paf->uMode & MMIO_RWMODE) == 0)
    return AVIERR_READONLY;

  switch (This->sInfo.fccType) {
  case streamtypeAUDIO:
    ckid = MAKEAVICKID(cktypeWAVEbytes, This->nStream);
    break;
  default:
    if ((flags & AVIIF_KEYFRAME) && buffersize != 0)
      ckid = MAKEAVICKID(cktypeDIBbits, This->nStream);
    else
      ckid = MAKEAVICKID(cktypeDIBcompressed, This->nStream);
    break;
  };

  /* append to end of stream? */
  if (start == -1) {
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    if (This->lLastFrame == -1)
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      start = This->sInfo.dwStart;
    else
      start = This->sInfo.dwLength;
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  } else if (This->lLastFrame == -1)
    This->sInfo.dwStart = start;
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  if (This->sInfo.dwSampleSize != 0) {
    /* fixed sample size -- audio like */
    if (samples * This->sInfo.dwSampleSize != buffersize)
      return AVIERR_BADPARAM;

    /* Couldn't skip audio-like data -- User must supply appropriate silence */
    if (This->sInfo.dwLength != start)
      return AVIERR_UNSUPPORTED;

    /* Convert position to frame/block */
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    start = This->lLastFrame + 1;
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    if ((This->paf->fInfo.dwFlags & AVIFILEINFO_ISINTERLEAVED) == 0) {
      FIXME(": not interleaved, could collect audio data!\n");
    }
  } else {
    /* variable sample size -- video like */
    if (samples > 1)
      return AVIERR_UNSUPPORTED;

    /* must we fill up with empty frames? */
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    if (This->lLastFrame != -1) {
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      FOURCC ckid2 = MAKEAVICKID(cktypeDIBcompressed, This->nStream);

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      while (start > This->lLastFrame + 1) {
	hr = AVIFILE_WriteBlock(This, This->lLastFrame + 1, ckid2, 0, NULL, 0);
1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241
	if (FAILED(hr))
	  return hr;
      }
    }
  }

  /* write the block now */
  hr = AVIFILE_WriteBlock(This, start, ckid, flags, buffer, buffersize);
  if (SUCCEEDED(hr)) {
    /* fill out return parameters if given */
    if (sampwritten != NULL)
      *sampwritten = samples;
    if (byteswritten != NULL)
      *byteswritten = buffersize;
  }

  return hr;
1242 1243
}

1244 1245 1246
static HRESULT WINAPI IAVIStream_fnDelete(IAVIStream *iface, LONG start,
					  LONG samples)
{
1247
  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
1248

1249 1250
  FIXME("(%p,%ld,%ld): stub\n", iface, start, samples);

1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280
  /* check parameters */
  if (start < 0 || samples < 0)
    return AVIERR_BADPARAM;

  /* Delete before start of stream? */
  if (start + samples < This->sInfo.dwStart)
    return AVIERR_OK;

  /* Delete after end of stream? */
  if (start > This->sInfo.dwLength)
    return AVIERR_OK;

  /* For the rest we need write permissions */
  if ((This->paf->uMode & MMIO_RWMODE) == 0)
    return AVIERR_READONLY;

  /* 1. overwrite the data with JUNK
   *
   * if ISINTERLEAVED {
   *   2. concat all neighboured JUNK-blocks in this record to one
   *   3. if this record only contains JUNK and is at end set dwNextFramePos
   *      to start of this record, repeat this.
   * } else {
   *   2. concat all neighboured JUNK-blocks.
   *   3. if the JUNK block is at the end, then set dwNextFramePos to
   *      start of this block.
   * }
   */

  return AVIERR_UNSUPPORTED;
1281 1282
}

1283 1284 1285
static HRESULT WINAPI IAVIStream_fnReadData(IAVIStream *iface, DWORD fcc,
					    LPVOID lp, LPLONG lpread)
{
1286
  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
1287

1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304
  TRACE("(%p,0x%08lX,%p,%p)\n", iface, fcc, lp, lpread);

  if (fcc == ckidSTREAMHANDLERDATA) {
    if (This->lpHandlerData != NULL && This->cbHandlerData > 0) {
      if (lp == NULL || *lpread <= 0) {
	*lpread = This->cbHandlerData;
	return AVIERR_OK;
      }

      memcpy(lp, This->lpHandlerData, min(This->cbHandlerData, *lpread));
      if (*lpread < This->cbHandlerData)
	return AVIERR_BUFFERTOOSMALL;
      return AVIERR_OK;
    } else
      return AVIERR_NODATA;
  } else
    return ReadExtraChunk(&This->extra, fcc, lp, lpread);
1305 1306
}

1307 1308 1309
static HRESULT WINAPI IAVIStream_fnWriteData(IAVIStream *iface, DWORD fcc,
					     LPVOID lp, LONG size)
{
1310
  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
1311

1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331
  TRACE("(%p,0x%08lx,%p,%ld)\n", iface, fcc, lp, size);

  /* check parameters */
  if (lp == NULL)
    return AVIERR_BADPARAM;
  if (size <= 0)
    return AVIERR_BADSIZE;

  /* need write permission */
  if ((This->paf->uMode & MMIO_RWMODE) == 0)
    return AVIERR_READONLY;

  /* already written something to this file? */
  if (This->paf->dwMoviChunkPos != 0) {
    /* the data will be inserted before the 'movi' chunk, so check for
     * enough space */
    DWORD dwPos = AVIFILE_ComputeMoviStart(This->paf);

    /* ckid,size => 2 * sizeof(DWORD) */
    dwPos += 2 * sizeof(DWORD) + size;
1332
    if (size >= This->paf->dwMoviChunkPos - 2 * sizeof(DWORD))
1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352
      return AVIERR_UNSUPPORTED; /* not enough space left */
  }

  This->paf->fDirty = TRUE;

  if (fcc == ckidSTREAMHANDLERDATA) {
    if (This->lpHandlerData != NULL) {
      FIXME(": handler data already set -- overwirte?\n");
      return AVIERR_UNSUPPORTED;
    }

    This->lpHandlerData = GlobalAllocPtr(GMEM_MOVEABLE, size);
    if (This->lpHandlerData == NULL)
      return AVIERR_MEMORY;
    This->cbHandlerData = size;
    memcpy(This->lpHandlerData, lp, size);

    return AVIERR_OK;
  } else
    return WriteExtraChunk(&This->extra, fcc, lp, size);
1353 1354
}

1355 1356 1357 1358 1359 1360
static HRESULT WINAPI IAVIStream_fnSetInfo(IAVIStream *iface,
					   LPAVISTREAMINFOW info, LONG infolen)
{
  FIXME("(%p,%p,%ld): stub\n", iface, info, infolen);

  return E_FAIL;
1361
}
1362 1363 1364 1365 1366

/***********************************************************************/

static HRESULT AVIFILE_AddFrame(IAVIStreamImpl *This, DWORD ckid, DWORD size, DWORD offset, DWORD flags)
{
1367 1368 1369
  /* pre-conditions */
  assert(This != NULL);

1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390
  switch (TWOCCFromFOURCC(ckid)) {
  case cktypeDIBbits:
    if (This->paf->fInfo.dwFlags & AVIFILEINFO_TRUSTCKTYPE)
      flags |= AVIIF_KEYFRAME;
    break;
  case cktypeDIBcompressed:
    if (This->paf->fInfo.dwFlags & AVIFILEINFO_TRUSTCKTYPE)
      flags &= ~AVIIF_KEYFRAME;
    break;
  case cktypePALchange:
    if (This->sInfo.fccType != streamtypeVIDEO) {
      ERR(": found palette change in non-video stream!\n");
      return AVIERR_BADFORMAT;
    }
    This->sInfo.dwFlags |= AVISTREAMINFO_FORMATCHANGES;
    This->sInfo.dwFormatChangeCount++;

    if (This->idxFmtChanges == NULL || This->sInfo.dwFormatChangeCount < This->nIdxFmtChanges) {
      UINT n = This->sInfo.dwFormatChangeCount;

      This->nIdxFmtChanges += 16;
1391 1392 1393 1394 1395 1396 1397
      if (This->idxFmtChanges == NULL)
	This->idxFmtChanges =
	  GlobalAllocPtr(GHND, This->nIdxFmtChanges * sizeof(AVIINDEXENTRY));
      else
	This->idxFmtChanges =
	  GlobalReAllocPtr(This->idxFmtChanges,
			   This->nIdxFmtChanges * sizeof(AVIINDEXENTRY), GHND);
1398 1399 1400
      if (This->idxFmtChanges == NULL)
	return AVIERR_MEMORY;

1401
      This->idxFmtChanges[n].ckid          = This->lLastFrame;
1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418
      This->idxFmtChanges[n].dwFlags       = 0;
      This->idxFmtChanges[n].dwChunkOffset = offset;
      This->idxFmtChanges[n].dwChunkLength = size;

      return AVIERR_OK;
    }
    break;
  case cktypeWAVEbytes:
    if (This->paf->fInfo.dwFlags & AVIFILEINFO_TRUSTCKTYPE)
      flags |= AVIIF_KEYFRAME;
    break;
  default:
    WARN(": unknown TWOCC 0x%04X found\n", TWOCCFromFOURCC(ckid));
    break;
  };

  /* first frame is alwasy a keyframe */
1419
  if (This->lLastFrame == -1)
1420 1421 1422 1423 1424 1425
    flags |= AVIIF_KEYFRAME;

  if (This->sInfo.dwSuggestedBufferSize < size)
    This->sInfo.dwSuggestedBufferSize = size;

  /* get memory for index */
1426
  if (This->idxFrames == NULL || This->lLastFrame + 1 >= This->nIdxFrames) {
1427
    This->nIdxFrames += 512;
1428 1429 1430 1431 1432 1433 1434
    if (This->idxFrames == NULL)
      This->idxFrames =
	GlobalAllocPtr(GHND, This->nIdxFrames * sizeof(AVIINDEXENTRY));
      else
	This->idxFrames =
	  GlobalReAllocPtr(This->idxFrames,
			   This->nIdxFrames * sizeof(AVIINDEXENTRY), GHND);
1435 1436 1437 1438
    if (This->idxFrames == NULL)
      return AVIERR_MEMORY;
  }

1439 1440 1441 1442 1443 1444
  This->lLastFrame++;
  This->idxFrames[This->lLastFrame].ckid          = ckid;
  This->idxFrames[This->lLastFrame].dwFlags       = flags;
  This->idxFrames[This->lLastFrame].dwChunkOffset = offset;
  This->idxFrames[This->lLastFrame].dwChunkLength = size;

1445
  /* update AVISTREAMINFO structure if necessary */
1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472
  if (This->sInfo.dwLength <= This->lLastFrame)
    This->sInfo.dwLength = This->lLastFrame + 1;

  return AVIERR_OK;
}

static HRESULT AVIFILE_AddRecord(IAVIFileImpl *This)
{
  /* pre-conditions */
  assert(This != NULL && This->ppStreams[0] != NULL);

  if (This->idxRecords == NULL || This->cbIdxRecords == 0) {
    This->cbIdxRecords += 1024 * sizeof(AVIINDEXENTRY);
    This->idxRecords = GlobalAllocPtr(GHND, This->cbIdxRecords);
    if (This->idxRecords == NULL)
      return AVIERR_MEMORY;
  }

  assert(This->nIdxRecords < This->cbIdxRecords/sizeof(AVIINDEXENTRY));

  This->idxRecords[This->nIdxRecords].ckid          = listtypeAVIRECORD;
  This->idxRecords[This->nIdxRecords].dwFlags       = AVIIF_LIST;
  This->idxRecords[This->nIdxRecords].dwChunkOffset =
    This->ckLastRecord.dwDataOffset - 2 * sizeof(DWORD);
  This->idxRecords[This->nIdxRecords].dwChunkLength =
    This->ckLastRecord.cksize;
  This->nIdxRecords++;
1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489

  return AVIERR_OK;
}

static DWORD   AVIFILE_ComputeMoviStart(IAVIFileImpl *This)
{
  DWORD dwPos;
  DWORD nStream;

  /* RIFF,hdrl,movi,avih => (3 * 3 + 2) * sizeof(DWORD) = 11 * sizeof(DWORD) */
  dwPos = 11 * sizeof(DWORD) + sizeof(MainAVIHeader);

  for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++) {
    IAVIStreamImpl *pStream = This->ppStreams[nStream];

    /* strl,strh,strf => (3 + 2 * 2) * sizeof(DWORD) = 7 * sizeof(DWORD) */
    dwPos += 7 * sizeof(DWORD) + sizeof(AVIStreamHeader);
1490
    dwPos += ((pStream->cbFormat + 1) & ~1U);
1491
    if (pStream->lpHandlerData != NULL && pStream->cbHandlerData > 0)
1492
      dwPos += 2 * sizeof(DWORD) + ((pStream->cbHandlerData + 1) & ~1U);
1493
    if (lstrlenW(pStream->sInfo.szName) > 0)
1494
      dwPos += 2 * sizeof(DWORD) + ((lstrlenW(pStream->sInfo.szName) + 1) & ~1U);
1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520
  }

  if (This->dwMoviChunkPos == 0) {
    This->dwNextFramePos = dwPos;

    /* pad to multiple of AVI_HEADERSIZE only if we are more than 8 bytes away from it */
    if (((dwPos + AVI_HEADERSIZE) & ~(AVI_HEADERSIZE - 1)) - dwPos > 2 * sizeof(DWORD))
      This->dwNextFramePos = (dwPos + AVI_HEADERSIZE) & ~(AVI_HEADERSIZE - 1);

    This->dwMoviChunkPos = This->dwNextFramePos - sizeof(DWORD);
  }

  return dwPos;
}

static void    AVIFILE_ConstructAVIStream(IAVIFileImpl *paf, DWORD nr, LPAVISTREAMINFOW asi)
{
  IAVIStreamImpl *pstream;

  /* pre-conditions */
  assert(paf != NULL);
  assert(nr < MAX_AVISTREAMS);
  assert(paf->ppStreams[nr] != NULL);

  pstream = paf->ppStreams[nr];

1521
  pstream->lpVtbl         = &iavist;
1522 1523 1524
  pstream->ref            = 0;
  pstream->paf            = paf;
  pstream->nStream        = nr;
1525
  pstream->dwCurrentFrame = (DWORD)-1;
1526
  pstream->lLastFrame    = -1;
1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562

  if (asi != NULL) {
    memcpy(&pstream->sInfo, asi, sizeof(pstream->sInfo));

    if (asi->dwLength > 0) {
      /* pre-allocate mem for frame-index structure */
      pstream->idxFrames =
	(AVIINDEXENTRY*)GlobalAllocPtr(GHND, asi->dwLength * sizeof(AVIINDEXENTRY));
      if (pstream->idxFrames != NULL)
	pstream->nIdxFrames = asi->dwLength;
    }
    if (asi->dwFormatChangeCount > 0) {
      /* pre-allocate mem for formatchange-index structure */
      pstream->idxFmtChanges =
	(AVIINDEXENTRY*)GlobalAllocPtr(GHND, asi->dwFormatChangeCount * sizeof(AVIINDEXENTRY));
      if (pstream->idxFmtChanges != NULL)
	pstream->nIdxFmtChanges = asi->dwFormatChangeCount;
    }

    /* These values will be computed */
    pstream->sInfo.dwLength              = 0;
    pstream->sInfo.dwSuggestedBufferSize = 0;
    pstream->sInfo.dwFormatChangeCount   = 0;
    pstream->sInfo.dwEditCount           = 1;
    if (pstream->sInfo.dwSampleSize > 0)
      SetRectEmpty(&pstream->sInfo.rcFrame);
  }

  pstream->sInfo.dwCaps = AVIFILECAPS_CANREAD|AVIFILECAPS_CANWRITE;
}

static void    AVIFILE_DestructAVIStream(IAVIStreamImpl *This)
{
  /* pre-conditions */
  assert(This != NULL);

1563
  This->dwCurrentFrame = (DWORD)-1;
1564
  This->lLastFrame    = -1;
1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607
  This->paf = NULL;
  if (This->idxFrames != NULL) {
    GlobalFreePtr(This->idxFrames);
    This->idxFrames  = NULL;
    This->nIdxFrames = 0;
  }
  if (This->idxFmtChanges != NULL) {
    GlobalFreePtr(This->idxFmtChanges);
    This->idxFmtChanges = NULL;
  }
  if (This->lpBuffer != NULL) {
    GlobalFreePtr(This->lpBuffer);
    This->lpBuffer = NULL;
    This->cbBuffer = 0;
  }
  if (This->lpHandlerData != NULL) {
    GlobalFreePtr(This->lpHandlerData);
    This->lpHandlerData = NULL;
    This->cbHandlerData = 0;
  }
  if (This->extra.lp != NULL) {
    GlobalFreePtr(This->extra.lp);
    This->extra.lp = NULL;
    This->extra.cb = 0;
  }
  if (This->lpFormat != NULL) {
    GlobalFreePtr(This->lpFormat);
    This->lpFormat = NULL;
    This->cbFormat = 0;
  }
}

static HRESULT AVIFILE_LoadFile(IAVIFileImpl *This)
{
  MainAVIHeader   MainAVIHdr;
  MMCKINFO        ckRIFF;
  MMCKINFO        ckLIST1;
  MMCKINFO        ckLIST2;
  MMCKINFO        ck;
  IAVIStreamImpl *pStream;
  DWORD           nStream;
  HRESULT         hr;

1608
  if (This->hmmio == NULL)
1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639
    return AVIERR_FILEOPEN;

  /* initialize stream ptr's */
  memset(This->ppStreams, 0, sizeof(This->ppStreams));

  /* try to get "RIFF" chunk -- must not be at beginning of file! */
  ckRIFF.fccType = formtypeAVI;
  if (mmioDescend(This->hmmio, &ckRIFF, NULL, MMIO_FINDRIFF) != S_OK) {
    ERR(": not an AVI!\n");
    return AVIERR_FILEREAD;
  }

  /* get "LIST" "hdrl" */
  ckLIST1.fccType = listtypeAVIHEADER;
  hr = FindChunkAndKeepExtras(&This->fileextra, This->hmmio, &ckLIST1, &ckRIFF, MMIO_FINDLIST);
  if (FAILED(hr))
    return hr;

  /* get "avih" chunk */
  ck.ckid = ckidAVIMAINHDR;
  hr = FindChunkAndKeepExtras(&This->fileextra, This->hmmio, &ck, &ckLIST1, MMIO_FINDCHUNK);
  if (FAILED(hr))
    return hr;

  if (ck.cksize != sizeof(MainAVIHdr)) {
    ERR(": invalid size of %ld for MainAVIHeader!\n", ck.cksize);
    return AVIERR_BADFORMAT;
  }
  if (mmioRead(This->hmmio, (HPSTR)&MainAVIHdr, ck.cksize) != ck.cksize)
    return AVIERR_FILEREAD;

1640 1641 1642 1643 1644 1645
  /* check for MAX_AVISTREAMS limit */
  if (MainAVIHdr.dwStreams > MAX_AVISTREAMS) {
    WARN("file contains %lu streams, but only supports %d -- change MAX_AVISTREAMS!\n", MainAVIHdr.dwStreams, MAX_AVISTREAMS);
    return AVIERR_UNSUPPORTED;
  }

1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703
  /* adjust permissions if copyrighted material in file */
  if (MainAVIHdr.dwFlags & AVIFILEINFO_COPYRIGHTED) {
    This->uMode &= ~MMIO_RWMODE;
    This->uMode |= MMIO_READ;
  }

  /* convert MainAVIHeader into AVIFILINFOW */
  memset(&This->fInfo, 0, sizeof(This->fInfo));
  This->fInfo.dwRate                = MainAVIHdr.dwMicroSecPerFrame;
  This->fInfo.dwScale               = 1000000;
  This->fInfo.dwMaxBytesPerSec      = MainAVIHdr.dwMaxBytesPerSec;
  This->fInfo.dwFlags               = MainAVIHdr.dwFlags;
  This->fInfo.dwCaps                = AVIFILECAPS_CANREAD|AVIFILECAPS_CANWRITE;
  This->fInfo.dwLength              = MainAVIHdr.dwTotalFrames;
  This->fInfo.dwStreams             = MainAVIHdr.dwStreams;
  This->fInfo.dwSuggestedBufferSize = MainAVIHdr.dwSuggestedBufferSize;
  This->fInfo.dwWidth               = MainAVIHdr.dwWidth;
  This->fInfo.dwHeight              = MainAVIHdr.dwHeight;
  LoadStringW(AVIFILE_hModule, IDS_AVIFILETYPE, This->fInfo.szFileType,
	      sizeof(This->fInfo.szFileType));

  /* go back to into header list */
  if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
    return AVIERR_FILEREAD;

  /* foreach stream exists a "LIST","strl" chunk */
  for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++) {
    /* get next nested chunk in this "LIST","strl" */
    if (mmioDescend(This->hmmio, &ckLIST2, &ckLIST1, 0) != S_OK)
      return AVIERR_FILEREAD;

    /* nested chunk must be of type "LIST","strl" -- when not normally JUNK */
    if (ckLIST2.ckid == FOURCC_LIST &&
	ckLIST2.fccType == listtypeSTREAMHEADER) {
      pStream = This->ppStreams[nStream] =
	(IAVIStreamImpl*)LocalAlloc(LPTR, sizeof(IAVIStreamImpl));
      if (pStream == NULL)
	return AVIERR_MEMORY;
      AVIFILE_ConstructAVIStream(This, nStream, NULL);

      ck.ckid = 0;
      while (mmioDescend(This->hmmio, &ck, &ckLIST2, 0) == S_OK) {
	switch (ck.ckid) {
	case ckidSTREAMHANDLERDATA:
	  if (pStream->lpHandlerData != NULL)
	    return AVIERR_BADFORMAT;
	  pStream->lpHandlerData = GlobalAllocPtr(GMEM_DDESHARE|GMEM_MOVEABLE,
						  ck.cksize);
	  if (pStream->lpHandlerData == NULL)
	    return AVIERR_MEMORY;
	  pStream->cbHandlerData = ck.cksize;

	  if (mmioRead(This->hmmio, (HPSTR)pStream->lpHandlerData, ck.cksize) != ck.cksize)
	    return AVIERR_FILEREAD;
	  break;
	case ckidSTREAMFORMAT:
	  if (pStream->lpFormat != NULL)
	    return AVIERR_BADFORMAT;
1704 1705 1706
          if (ck.cksize == 0)
            break;

1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806
	  pStream->lpFormat = GlobalAllocPtr(GMEM_DDESHARE|GMEM_MOVEABLE,
					     ck.cksize);
	  if (pStream->lpFormat == NULL)
	    return AVIERR_MEMORY;
	  pStream->cbFormat = ck.cksize;

	  if (mmioRead(This->hmmio, (HPSTR)pStream->lpFormat, ck.cksize) != ck.cksize)
	    return AVIERR_FILEREAD;

	  if (pStream->sInfo.fccType == streamtypeVIDEO) {
	    LPBITMAPINFOHEADER lpbi = (LPBITMAPINFOHEADER)pStream->lpFormat;

	    /* some corrections to the video format */
	    if (lpbi->biClrUsed == 0 && lpbi->biBitCount <= 8)
	      lpbi->biClrUsed = 1u << lpbi->biBitCount;
	    if (lpbi->biCompression == BI_RGB && lpbi->biSizeImage == 0)
	      lpbi->biSizeImage = DIBWIDTHBYTES(*lpbi) * lpbi->biHeight;
	    if (lpbi->biCompression != BI_RGB && lpbi->biBitCount == 8) {
	      if (pStream->sInfo.fccHandler == mmioFOURCC('R','L','E','0') ||
		  pStream->sInfo.fccHandler == mmioFOURCC('R','L','E',' '))
		lpbi->biCompression = BI_RLE8;
	    }
	    if (lpbi->biCompression == BI_RGB &&
		(pStream->sInfo.fccHandler == 0 ||
		 pStream->sInfo.fccHandler == mmioFOURCC('N','O','N','E')))
	      pStream->sInfo.fccHandler = comptypeDIB;

	    /* init rcFrame if it's empty */
	    if (IsRectEmpty(&pStream->sInfo.rcFrame))
	      SetRect(&pStream->sInfo.rcFrame, 0, 0, lpbi->biWidth, lpbi->biHeight);
	  }
	  break;
	case ckidSTREAMHEADER:
	  {
	    static const WCHAR streamTypeFmt[] = {'%','4','.','4','h','s',0};

	    AVIStreamHeader streamHdr;
	    WCHAR           szType[25];
	    WCHAR           streamNameFmt[25];
	    UINT            count;
	    LONG            n = ck.cksize;

	    if (ck.cksize > sizeof(streamHdr))
	      n = sizeof(streamHdr);

	    if (mmioRead(This->hmmio, (HPSTR)&streamHdr, n) != n)
	      return AVIERR_FILEREAD;

	    pStream->sInfo.fccType               = streamHdr.fccType;
	    pStream->sInfo.fccHandler            = streamHdr.fccHandler;
	    pStream->sInfo.dwFlags               = streamHdr.dwFlags;
	    pStream->sInfo.wPriority             = streamHdr.wPriority;
	    pStream->sInfo.wLanguage             = streamHdr.wLanguage;
	    pStream->sInfo.dwInitialFrames       = streamHdr.dwInitialFrames;
	    pStream->sInfo.dwScale               = streamHdr.dwScale;
	    pStream->sInfo.dwRate                = streamHdr.dwRate;
	    pStream->sInfo.dwStart               = streamHdr.dwStart;
	    pStream->sInfo.dwLength              = streamHdr.dwLength;
	    pStream->sInfo.dwSuggestedBufferSize =
	      streamHdr.dwSuggestedBufferSize;
	    pStream->sInfo.dwQuality             = streamHdr.dwQuality;
	    pStream->sInfo.dwSampleSize          = streamHdr.dwSampleSize;
	    pStream->sInfo.rcFrame.left          = streamHdr.rcFrame.left;
	    pStream->sInfo.rcFrame.top           = streamHdr.rcFrame.top;
	    pStream->sInfo.rcFrame.right         = streamHdr.rcFrame.right;
	    pStream->sInfo.rcFrame.bottom        = streamHdr.rcFrame.bottom;
	    pStream->sInfo.dwEditCount           = 0;
	    pStream->sInfo.dwFormatChangeCount   = 0;

	    /* generate description for stream like "filename.avi Type #n" */
	    if (streamHdr.fccType == streamtypeVIDEO)
	      LoadStringW(AVIFILE_hModule, IDS_VIDEO, szType, sizeof(szType));
	    else if (streamHdr.fccType == streamtypeAUDIO)
	      LoadStringW(AVIFILE_hModule, IDS_AUDIO, szType, sizeof(szType));
	    else
	      wsprintfW(szType, streamTypeFmt, (char*)&streamHdr.fccType);

	    /* get count of this streamtype up to this stream */
	    count = 0;
	    for (n = nStream; 0 <= n; n--) {
	      if (This->ppStreams[n]->sInfo.fccHandler == streamHdr.fccType)
		count++;
	    }

	    memset(pStream->sInfo.szName, 0, sizeof(pStream->sInfo.szName));

	    LoadStringW(AVIFILE_hModule, IDS_AVISTREAMFORMAT, streamNameFmt, sizeof(streamNameFmt));

	    /* FIXME: avoid overflow -- better use wsnprintfW, which doesn't exists ! */
	    wsprintfW(pStream->sInfo.szName, streamNameFmt,
		      AVIFILE_BasenameW(This->szFileName), szType, count);
	  }
	  break;
	case ckidSTREAMNAME:
	  { /* streamname will be saved as ASCII string */
	    LPSTR str = (LPSTR)LocalAlloc(LMEM_FIXED, ck.cksize);
	    if (str == NULL)
	      return AVIERR_MEMORY;

	    if (mmioRead(This->hmmio, (HPSTR)str, ck.cksize) != ck.cksize)
1807 1808
	    {
	      LocalFree((HLOCAL)str);
1809
	      return AVIERR_FILEREAD;
1810
	    }
1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836

	    MultiByteToWideChar(CP_ACP, 0, str, -1, pStream->sInfo.szName,
				sizeof(pStream->sInfo.szName)/sizeof(pStream->sInfo.szName[0]));

	    LocalFree((HLOCAL)str);
	  }
	  break;
	case ckidAVIPADDING:
	case mmioFOURCC('p','a','d','d'):
	  break;
	default:
	  WARN(": found extra chunk 0x%08lX\n", ck.ckid);
	  hr = ReadChunkIntoExtra(&pStream->extra, This->hmmio, &ck);
	  if (FAILED(hr))
	    return hr;
	};

	if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
	  return AVIERR_FILEREAD;
      }
    } else {
      /* nested chunks in "LIST","hdrl" which are not of type "LIST","strl" */
      hr = ReadChunkIntoExtra(&This->fileextra, This->hmmio, &ckLIST2);
      if (FAILED(hr))
	return hr;
    }
1837 1838
    if (mmioAscend(This->hmmio, &ckLIST2, 0) != S_OK)
      return AVIERR_FILEREAD;
1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852
  }

  /* read any extra headers in "LIST","hdrl" */
  FindChunkAndKeepExtras(&This->fileextra, This->hmmio, &ck, &ckLIST1, 0);
  if (mmioAscend(This->hmmio, &ckLIST1, 0) != S_OK)
    return AVIERR_FILEREAD;

  /* search "LIST","movi" chunk in "RIFF","AVI " */
  ckLIST1.fccType = listtypeAVIMOVIE;
  hr = FindChunkAndKeepExtras(&This->fileextra, This->hmmio, &ckLIST1, &ckRIFF,
			      MMIO_FINDLIST);
  if (FAILED(hr))
    return hr;

1853
  This->dwMoviChunkPos = ckLIST1.dwDataOffset;
1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870
  This->dwIdxChunkPos  = ckLIST1.cksize + ckLIST1.dwDataOffset;
  if (mmioAscend(This->hmmio, &ckLIST1, 0) != S_OK)
    return AVIERR_FILEREAD;

  /* try to find an index */
  ck.ckid = ckidAVINEWINDEX;
  hr = FindChunkAndKeepExtras(&This->fileextra, This->hmmio,
			      &ck, &ckRIFF, MMIO_FINDCHUNK);
  if (SUCCEEDED(hr) && ck.cksize > 0) {
    if (FAILED(AVIFILE_LoadIndex(This, ck.cksize, ckLIST1.dwDataOffset)))
      This->fInfo.dwFlags &= ~AVIFILEINFO_HASINDEX;
  }

  /* when we haven't found an index or it's bad, then build one
   * by parsing 'movi' chunk */
  if ((This->fInfo.dwFlags & AVIFILEINFO_HASINDEX) == 0) {
    for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++)
1871
      This->ppStreams[nStream]->lLastFrame = -1;
1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883

    if (mmioSeek(This->hmmio, ckLIST1.dwDataOffset + sizeof(DWORD), SEEK_SET) == -1) {
      ERR(": Oops, can't seek back to 'movi' chunk!\n");
      return AVIERR_FILEREAD;
    }

    /* seek through the 'movi' list until end */
    while (mmioDescend(This->hmmio, &ck, &ckLIST1, 0) == S_OK) {
      if (ck.ckid != FOURCC_LIST) {
	if (mmioAscend(This->hmmio, &ck, 0) == S_OK) {
	  nStream = StreamFromFOURCC(ck.ckid);

1884 1885 1886
	  if (nStream > This->fInfo.dwStreams)
	    return AVIERR_BADFORMAT;

1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929
	  AVIFILE_AddFrame(This->ppStreams[nStream], ck.ckid, ck.cksize,
			   ck.dwDataOffset - 2 * sizeof(DWORD), 0);
	} else {
	  nStream = StreamFromFOURCC(ck.ckid);
	  WARN(": file seems to be truncated!\n");
	  if (nStream <= This->fInfo.dwStreams &&
	      This->ppStreams[nStream]->sInfo.dwSampleSize > 0) {
	    ck.cksize = mmioSeek(This->hmmio, 0, SEEK_END);
	    if (ck.cksize != -1) {
	      ck.cksize -= ck.dwDataOffset;
	      ck.cksize &= ~(This->ppStreams[nStream]->sInfo.dwSampleSize - 1);

	      AVIFILE_AddFrame(This->ppStreams[nStream], ck.ckid, ck.cksize,
			       ck.dwDataOffset - 2 * sizeof(DWORD), 0);
	    }
	  }
	}
      }
    }
  }

  /* find other chunks */
  FindChunkAndKeepExtras(&This->fileextra, This->hmmio, &ck, &ckRIFF, 0);

  return AVIERR_OK;
}

static HRESULT AVIFILE_LoadIndex(IAVIFileImpl *This, DWORD size, DWORD offset)
{
  AVIINDEXENTRY *lp;
  DWORD          pos, n;
  HRESULT        hr = AVIERR_OK;
  BOOL           bAbsolute = TRUE;

  lp = (AVIINDEXENTRY*)GlobalAllocPtr(GMEM_MOVEABLE,
				      IDX_PER_BLOCK * sizeof(AVIINDEXENTRY));
  if (lp == NULL)
    return AVIERR_MEMORY;

  /* adjust limits for index tables, so that inserting will be faster */
  for (n = 0; n < This->fInfo.dwStreams; n++) {
    IAVIStreamImpl *pStream = This->ppStreams[n];

1930
    pStream->lLastFrame = -1;
1931 1932 1933 1934 1935 1936 1937 1938 1939

    if (pStream->idxFrames != NULL) {
      GlobalFreePtr(pStream->idxFrames);
      pStream->idxFrames  = NULL;
      pStream->nIdxFrames = 0;
    }

    if (pStream->sInfo.dwSampleSize != 0) {
      if (n > 0 && This->fInfo.dwFlags & AVIFILEINFO_ISINTERLEAVED) {
1940
	pStream->nIdxFrames = This->ppStreams[0]->nIdxFrames;
1941 1942 1943 1944 1945 1946 1947 1948 1949
      } else if (pStream->sInfo.dwSuggestedBufferSize) {
	pStream->nIdxFrames =
	  pStream->sInfo.dwLength / pStream->sInfo.dwSuggestedBufferSize;
      }
    } else
      pStream->nIdxFrames = pStream->sInfo.dwLength;

    pStream->idxFrames =
      (AVIINDEXENTRY*)GlobalAllocPtr(GHND, pStream->nIdxFrames * sizeof(AVIINDEXENTRY));
1950
    if (pStream->idxFrames == NULL && pStream->nIdxFrames > 0) {
1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975
      pStream->nIdxFrames = 0;
      return AVIERR_MEMORY;
    }
  }

  pos = (DWORD)-1;
  while (size != 0) {
    LONG read = min(IDX_PER_BLOCK * sizeof(AVIINDEXENTRY), size);

    if (mmioRead(This->hmmio, (HPSTR)lp, read) != read) {
      hr = AVIERR_FILEREAD;
      break;
    }
    size -= read;

    if (pos == (DWORD)-1)
      pos = offset - lp->dwChunkOffset + sizeof(DWORD);

    AVIFILE_ParseIndex(This, lp, read / sizeof(AVIINDEXENTRY),
		       pos, &bAbsolute);
  }

  if (lp != NULL)
    GlobalFreePtr(lp);

1976 1977 1978 1979
  /* checking ... */
  for (n = 0; n < This->fInfo.dwStreams; n++) {
    IAVIStreamImpl *pStream = This->ppStreams[n];

1980 1981
    if (pStream->sInfo.dwSampleSize == 0 &&
	pStream->sInfo.dwLength != pStream->lLastFrame+1)
1982 1983 1984 1985
      ERR("stream %lu length mismatch: dwLength=%lu found=%ld\n",
	   n, pStream->sInfo.dwLength, pStream->lLastFrame);
  }

1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
  return hr;
}

static HRESULT AVIFILE_ParseIndex(IAVIFileImpl *This, AVIINDEXENTRY *lp,
				  LONG count, DWORD pos, BOOL *bAbsolute)
{
  if (lp == NULL)
    return AVIERR_BADPARAM;

  for (; count > 0; count--, lp++) {
    WORD nStream = StreamFromFOURCC(lp->ckid);

    if (lp->ckid == listtypeAVIRECORD || nStream == 0x7F)
      continue; /* skip these */

    if (nStream > This->fInfo.dwStreams)
      return AVIERR_BADFORMAT;

2004
    if (*bAbsolute && lp->dwChunkOffset < This->dwMoviChunkPos)
2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
      *bAbsolute = FALSE;

    if (*bAbsolute)
      lp->dwChunkOffset += sizeof(DWORD);
    else
      lp->dwChunkOffset += pos;

    if (FAILED(AVIFILE_AddFrame(This->ppStreams[nStream], lp->ckid, lp->dwChunkLength, lp->dwChunkOffset, lp->dwFlags)))
      return AVIERR_MEMORY;
  }

  return AVIERR_OK;
}

static HRESULT AVIFILE_ReadBlock(IAVIStreamImpl *This, DWORD pos,
				 LPVOID buffer, LONG size)
{
  /* pre-conditions */
  assert(This != NULL);
  assert(This->paf != NULL);
2025
  assert(This->paf->hmmio != NULL);
2026
  assert(This->sInfo.dwStart <= pos && pos < This->sInfo.dwLength);
2027
  assert(pos <= This->lLastFrame);
2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039

  /* should we read as much as block gives us? */
  if (size == 0 || size > This->idxFrames[pos].dwChunkLength)
    size = This->idxFrames[pos].dwChunkLength;

  /* read into out own buffer or given one? */
  if (buffer == NULL) {
    /* we also read the chunk */
    size += 2 * sizeof(DWORD);

    /* check that buffer is big enough -- don't trust dwSuggestedBufferSize */
    if (This->lpBuffer == NULL || size < This->cbBuffer) {
2040 2041 2042 2043 2044 2045 2046
      DWORD maxSize = max(size, This->sInfo.dwSuggestedBufferSize);

      if (This->lpBuffer == NULL)
	This->lpBuffer = (LPDWORD)GlobalAllocPtr(GMEM_MOVEABLE, maxSize);
      else
	This->lpBuffer =
	  (LPDWORD)GlobalReAllocPtr(This->lpBuffer, maxSize, GMEM_MOVEABLE);
2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081
      if (This->lpBuffer == NULL)
	return AVIERR_MEMORY;
      This->cbBuffer = max(size, This->sInfo.dwSuggestedBufferSize);
    }

    /* now read the complete chunk into our buffer */
    if (mmioSeek(This->paf->hmmio, This->idxFrames[pos].dwChunkOffset, SEEK_SET) == -1)
      return AVIERR_FILEREAD;
    if (mmioRead(This->paf->hmmio, (HPSTR)This->lpBuffer, size) != size)
      return AVIERR_FILEREAD;

    /* check if it was the correct block which we have read */
    if (This->lpBuffer[0] != This->idxFrames[pos].ckid ||
	This->lpBuffer[1] != This->idxFrames[pos].dwChunkLength) {
      ERR(": block %ld not found at 0x%08lX\n", pos, This->idxFrames[pos].dwChunkOffset);
      ERR(": Index says: '%4.4s'(0x%08lX) size 0x%08lX\n",
	  (char*)&This->idxFrames[pos].ckid, This->idxFrames[pos].ckid,
	  This->idxFrames[pos].dwChunkLength);
      ERR(": Data  says: '%4.4s'(0x%08lX) size 0x%08lX\n",
	  (char*)&This->lpBuffer[0], This->lpBuffer[0], This->lpBuffer[1]);
      return AVIERR_FILEREAD;
    }
  } else {
    if (mmioSeek(This->paf->hmmio, This->idxFrames[pos].dwChunkOffset + 2 * sizeof(DWORD), SEEK_SET) == -1)
      return AVIERR_FILEREAD;
    if (mmioRead(This->paf->hmmio, (HPSTR)buffer, size) != size)
      return AVIERR_FILEREAD;
  }

  return AVIERR_OK;
}

static void    AVIFILE_SamplesToBlock(IAVIStreamImpl *This, LPLONG pos,
				      LPLONG offset)
{
2082
  LONG block;
2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095

  /* pre-conditions */
  assert(This != NULL);
  assert(pos != NULL);
  assert(offset != NULL);
  assert(This->sInfo.dwSampleSize != 0);
  assert(*pos >= This->sInfo.dwStart);

  /* convert start sample to start bytes */
  (*offset)  = (*pos) - This->sInfo.dwStart;
  (*offset) *= This->sInfo.dwSampleSize;

  /* convert bytes to block number */
2096
  for (block = 0; block <= This->lLastFrame; block++) {
2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121
    if (This->idxFrames[block].dwChunkLength <= *offset)
      (*offset) -= This->idxFrames[block].dwChunkLength;
    else
      break;
  }

  *pos = block;
}

static HRESULT AVIFILE_SaveFile(IAVIFileImpl *This)
{
  MainAVIHeader   MainAVIHdr;
  IAVIStreamImpl* pStream;
  MMCKINFO        ckRIFF;
  MMCKINFO        ckLIST1;
  MMCKINFO        ckLIST2;
  MMCKINFO        ck;
  DWORD           nStream;
  DWORD           dwPos;
  HRESULT         hr;

  /* initialize some things */
  if (This->dwMoviChunkPos == 0)
    AVIFILE_ComputeMoviStart(This);

2122 2123 2124 2125 2126 2127 2128
  /* written one record to much? */
  if (This->ckLastRecord.dwFlags & MMIO_DIRTY) {
    This->dwNextFramePos -= 3 * sizeof(DWORD);
    if (This->nIdxRecords > 0)
      This->nIdxRecords--;
  }

2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144
  AVIFILE_UpdateInfo(This);

  assert(This->fInfo.dwScale != 0);

  memset(&MainAVIHdr, 0, sizeof(MainAVIHdr));
  MainAVIHdr.dwMicroSecPerFrame    = MulDiv(This->fInfo.dwRate, 1000000,
					    This->fInfo.dwScale);
  MainAVIHdr.dwMaxBytesPerSec      = This->fInfo.dwMaxBytesPerSec;
  MainAVIHdr.dwPaddingGranularity  = AVI_HEADERSIZE;
  MainAVIHdr.dwFlags               = This->fInfo.dwFlags;
  MainAVIHdr.dwTotalFrames         = This->fInfo.dwLength;
  MainAVIHdr.dwInitialFrames       = 0;
  MainAVIHdr.dwStreams             = This->fInfo.dwStreams;
  MainAVIHdr.dwSuggestedBufferSize = This->fInfo.dwSuggestedBufferSize;
  MainAVIHdr.dwWidth               = This->fInfo.dwWidth;
  MainAVIHdr.dwHeight              = This->fInfo.dwHeight;
2145
  MainAVIHdr.dwInitialFrames       = This->dwInitialFrames;
2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172

  /* now begin writing ... */
  mmioSeek(This->hmmio, 0, SEEK_SET);

  /* RIFF chunk */
  ckRIFF.cksize  = 0;
  ckRIFF.fccType = formtypeAVI;
  if (mmioCreateChunk(This->hmmio, &ckRIFF, MMIO_CREATERIFF) != S_OK)
    return AVIERR_FILEWRITE;

  /* AVI headerlist */
  ckLIST1.cksize  = 0;
  ckLIST1.fccType = listtypeAVIHEADER;
  if (mmioCreateChunk(This->hmmio, &ckLIST1, MMIO_CREATELIST) != S_OK)
    return AVIERR_FILEWRITE;

  /* MainAVIHeader */
  ck.ckid    = ckidAVIMAINHDR;
  ck.cksize  = sizeof(MainAVIHdr);
  ck.fccType = 0;
  if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
    return AVIERR_FILEWRITE;
  if (mmioWrite(This->hmmio, (HPSTR)&MainAVIHdr, ck.cksize) != ck.cksize)
    return AVIERR_FILEWRITE;
  if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
    return AVIERR_FILEWRITE;

2173
  /* write the headers of each stream into a separate streamheader list */
2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193
  for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++) {
    AVIStreamHeader strHdr;

    pStream = This->ppStreams[nStream];

    /* begin the new streamheader list */
    ckLIST2.cksize  = 0;
    ckLIST2.fccType = listtypeSTREAMHEADER;
    if (mmioCreateChunk(This->hmmio, &ckLIST2, MMIO_CREATELIST) != S_OK)
      return AVIERR_FILEWRITE;

    /* create an AVIStreamHeader from the AVSTREAMINFO */
    strHdr.fccType               = pStream->sInfo.fccType;
    strHdr.fccHandler            = pStream->sInfo.fccHandler;
    strHdr.dwFlags               = pStream->sInfo.dwFlags;
    strHdr.wPriority             = pStream->sInfo.wPriority;
    strHdr.wLanguage             = pStream->sInfo.wLanguage;
    strHdr.dwInitialFrames       = pStream->sInfo.dwInitialFrames;
    strHdr.dwScale               = pStream->sInfo.dwScale;
    strHdr.dwRate                = pStream->sInfo.dwRate;
2194
    strHdr.dwStart               = pStream->sInfo.dwStart;
2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213
    strHdr.dwLength              = pStream->sInfo.dwLength;
    strHdr.dwSuggestedBufferSize = pStream->sInfo.dwSuggestedBufferSize;
    strHdr.dwQuality             = pStream->sInfo.dwQuality;
    strHdr.dwSampleSize          = pStream->sInfo.dwSampleSize;
    strHdr.rcFrame.left          = pStream->sInfo.rcFrame.left;
    strHdr.rcFrame.top           = pStream->sInfo.rcFrame.top;
    strHdr.rcFrame.right         = pStream->sInfo.rcFrame.right;
    strHdr.rcFrame.bottom        = pStream->sInfo.rcFrame.bottom;

    /* now write the AVIStreamHeader */
    ck.ckid   = ckidSTREAMHEADER;
    ck.cksize = sizeof(strHdr);
    if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
      return AVIERR_FILEWRITE;
    if (mmioWrite(This->hmmio, (HPSTR)&strHdr, ck.cksize) != ck.cksize)
      return AVIERR_FILEWRITE;
    if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
      return AVIERR_FILEWRITE;

2214
    /* ... the hopefully ever present streamformat ... */
2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355
    ck.ckid   = ckidSTREAMFORMAT;
    ck.cksize = pStream->cbFormat;
    if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
      return AVIERR_FILEWRITE;
    if (pStream->lpFormat != NULL && ck.cksize > 0) {
      if (mmioWrite(This->hmmio, (HPSTR)pStream->lpFormat, ck.cksize) != ck.cksize)
	return AVIERR_FILEWRITE;
    }
    if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
      return AVIERR_FILEWRITE;

    /* ... some optional existing handler data ... */
    if (pStream->lpHandlerData != NULL && pStream->cbHandlerData > 0) {
      ck.ckid   = ckidSTREAMHANDLERDATA;
      ck.cksize = pStream->cbHandlerData;
      if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
	return AVIERR_FILEWRITE;
      if (mmioWrite(This->hmmio, (HPSTR)pStream->lpHandlerData, ck.cksize) != ck.cksize)
	return AVIERR_FILEWRITE;
      if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
	return AVIERR_FILEWRITE;
    }

    /* ... some optional additional extra chunk for this stream ... */
    if (pStream->extra.lp != NULL && pStream->extra.cb > 0) {
      /* the chunk header(s) are already in the strucuture */
      if (mmioWrite(This->hmmio, (HPSTR)pStream->extra.lp, pStream->extra.cb) != pStream->extra.cb)
	return AVIERR_FILEWRITE;
    }

    /* ... an optional name for this stream ... */
    if (lstrlenW(pStream->sInfo.szName) > 0) {
      LPSTR str;

      ck.ckid   = ckidSTREAMNAME;
      ck.cksize = lstrlenW(pStream->sInfo.szName) + 1;
      if (ck.cksize & 1) /* align */
	ck.cksize++;
      if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
	return AVIERR_FILEWRITE;

      /* the streamname must be saved in ASCII not Unicode */
      str = (LPSTR)LocalAlloc(LPTR, ck.cksize);
      if (str == NULL)
	return AVIERR_MEMORY;
      WideCharToMultiByte(CP_ACP, 0, pStream->sInfo.szName, -1, str,
			  ck.cksize, NULL, NULL);

      if (mmioWrite(This->hmmio, (HPSTR)str, ck.cksize) != ck.cksize) {
	LocalFree((HLOCAL)str);	
	return AVIERR_FILEWRITE;
      }

      LocalFree((HLOCAL)str);
      if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
	return AVIERR_FILEWRITE;
    }

    /* close streamheader list for this stream */
    if (mmioAscend(This->hmmio, &ckLIST2, 0) != S_OK)
      return AVIERR_FILEWRITE;
  } /* for (0 <= nStream < MainAVIHdr.dwStreams) */

  /* close the aviheader list */
  if (mmioAscend(This->hmmio, &ckLIST1, 0) != S_OK)
    return AVIERR_FILEWRITE;

  /* check for padding to pre-guessed 'movi'-chunk position */
  dwPos = ckLIST1.dwDataOffset + ckLIST1.cksize;
  if (This->dwMoviChunkPos - 2 * sizeof(DWORD) > dwPos) {
    ck.ckid   = ckidAVIPADDING;
    ck.cksize = This->dwMoviChunkPos - dwPos - 4 * sizeof(DWORD);
    assert((LONG)ck.cksize >= 0);

    if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
      return AVIERR_FILEWRITE;
    if (mmioSeek(This->hmmio, ck.cksize, SEEK_CUR) == -1)
      return AVIERR_FILEWRITE;
    if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
      return AVIERR_FILEWRITE;
  }

  /* now write the 'movi' chunk */
  mmioSeek(This->hmmio, This->dwMoviChunkPos - 2 * sizeof(DWORD), SEEK_SET);
  ckLIST1.cksize  = 0;
  ckLIST1.fccType = listtypeAVIMOVIE;
  if (mmioCreateChunk(This->hmmio, &ckLIST1, MMIO_CREATELIST) != S_OK)
    return AVIERR_FILEWRITE;
  if (mmioSeek(This->hmmio, This->dwNextFramePos, SEEK_SET) == -1)
    return AVIERR_FILEWRITE;
  if (mmioAscend(This->hmmio, &ckLIST1, 0) != S_OK)
    return AVIERR_FILEWRITE;

  /* write 'idx1' chunk */
  hr = AVIFILE_SaveIndex(This);
  if (FAILED(hr))
    return hr;

  /* write optional extra file chunks */
  if (This->fileextra.lp != NULL && This->fileextra.cb > 0) {
    /* as for the streams, are the chunk header(s) in the structure */
    if (mmioWrite(This->hmmio, (HPSTR)This->fileextra.lp, This->fileextra.cb) != This->fileextra.cb)
      return AVIERR_FILEWRITE;
  }

  /* close RIFF chunk */
  if (mmioAscend(This->hmmio, &ckRIFF, 0) != S_OK)
    return AVIERR_FILEWRITE;

  /* add some JUNK at end for bad parsers */
  memset(&ckRIFF, 0, sizeof(ckRIFF));
  mmioWrite(This->hmmio, (HPSTR)&ckRIFF, sizeof(ckRIFF));
  mmioFlush(This->hmmio, 0);

  return AVIERR_OK;
}

static HRESULT AVIFILE_SaveIndex(IAVIFileImpl *This)
{
  IAVIStreamImpl *pStream;
  AVIINDEXENTRY   idx;
  MMCKINFO        ck;
  DWORD           nStream;
  LONG            n;

  ck.ckid   = ckidAVINEWINDEX;
  ck.cksize = 0;
  if (mmioCreateChunk(This->hmmio, &ck, 0) != S_OK)
    return AVIERR_FILEWRITE;

  if (This->fInfo.dwFlags & AVIFILEINFO_ISINTERLEAVED) {
    /* is interleaved -- write block of coresponding frames */
    LONG lInitialFrames = 0;
    LONG stepsize;
    LONG i;

    if (This->ppStreams[0]->sInfo.dwSampleSize == 0)
      stepsize = 1;
    else
      stepsize = AVIStreamTimeToSample((PAVISTREAM)This->ppStreams[0], 1000000);

2356 2357
    assert(stepsize > 0);

2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376
    for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++) {
      if (lInitialFrames < This->ppStreams[nStream]->sInfo.dwInitialFrames)
	lInitialFrames = This->ppStreams[nStream]->sInfo.dwInitialFrames;
    }

    for (i = -lInitialFrames; i < (LONG)This->fInfo.dwLength - lInitialFrames;
	 i += stepsize) {
      DWORD nFrame = lInitialFrames + i;

      assert(nFrame < This->nIdxRecords);

      idx.ckid          = listtypeAVIRECORD;
      idx.dwFlags       = AVIIF_LIST;
      idx.dwChunkLength = This->idxRecords[nFrame].dwChunkLength;
      idx.dwChunkOffset = This->idxRecords[nFrame].dwChunkOffset
	- This->dwMoviChunkPos;
      if (mmioWrite(This->hmmio, (HPSTR)&idx, sizeof(idx)) != sizeof(idx))
	return AVIERR_FILEWRITE;

2377
      for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++) {
2378 2379 2380 2381 2382 2383 2384 2385 2386 2387
	pStream = This->ppStreams[nStream];

	/* heave we reached start of this stream? */
	if (-(LONG)pStream->sInfo.dwInitialFrames > i)
	  continue;

	if (pStream->sInfo.dwInitialFrames < lInitialFrames)
	  nFrame -= (lInitialFrames - pStream->sInfo.dwInitialFrames);

	/* reached end of this stream? */
2388
	if (pStream->lLastFrame <= nFrame)
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	  continue;

	if ((pStream->sInfo.dwFlags & AVISTREAMINFO_FORMATCHANGES) &&
	    pStream->sInfo.dwFormatChangeCount != 0 &&
	    pStream->idxFmtChanges != NULL) {
	  DWORD pos;

	  for (pos = 0; pos < pStream->sInfo.dwFormatChangeCount; pos++) {
	    if (pStream->idxFmtChanges[pos].ckid == nFrame) {
	      idx.dwFlags = AVIIF_NOTIME;
	      idx.ckid    = MAKEAVICKID(cktypePALchange, pStream->nStream);
	      idx.dwChunkLength = pStream->idxFmtChanges[pos].dwChunkLength;
	      idx.dwChunkOffset = pStream->idxFmtChanges[pos].dwChunkOffset
		- This->dwMoviChunkPos;

	      if (mmioWrite(This->hmmio, (HPSTR)&idx, sizeof(idx)) != sizeof(idx))
		return AVIERR_FILEWRITE;
	      break;
	    }
	  }
	} /* if have formatchanges */

	idx.ckid          = pStream->idxFrames[nFrame].ckid;
	idx.dwFlags       = pStream->idxFrames[nFrame].dwFlags;
	idx.dwChunkLength = pStream->idxFrames[nFrame].dwChunkLength;
	idx.dwChunkOffset = pStream->idxFrames[nFrame].dwChunkOffset
	  - This->dwMoviChunkPos;
	if (mmioWrite(This->hmmio, (HPSTR)&idx, sizeof(idx)) != sizeof(idx))
	  return AVIERR_FILEWRITE;
      }
    }
  } else {
    /* not interleaved -- write index for each stream at once */
2422
    for (nStream = 0; nStream < This->fInfo.dwStreams; nStream++) {
2423 2424
      pStream = This->ppStreams[nStream];

2425
      for (n = 0; n <= pStream->lLastFrame; n++) {
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	if ((pStream->sInfo.dwFlags & AVISTREAMINFO_FORMATCHANGES) &&
	    (pStream->sInfo.dwFormatChangeCount != 0)) {
	  DWORD pos;

	  for (pos = 0; pos < pStream->sInfo.dwFormatChangeCount; pos++) {
	    if (pStream->idxFmtChanges[pos].ckid == n) {
	      idx.dwFlags = AVIIF_NOTIME;
	      idx.ckid    = MAKEAVICKID(cktypePALchange, pStream->nStream);
	      idx.dwChunkLength = pStream->idxFmtChanges[pos].dwChunkLength;
	      idx.dwChunkOffset =
		pStream->idxFmtChanges[pos].dwChunkOffset - This->dwMoviChunkPos;
	      if (mmioWrite(This->hmmio, (HPSTR)&idx, sizeof(idx)) != sizeof(idx))
		return AVIERR_FILEWRITE;
	      break;
	    }
	  }
	} /* if have formatchanges */

	idx.ckid          = pStream->idxFrames[n].ckid;
	idx.dwFlags       = pStream->idxFrames[n].dwFlags;
	idx.dwChunkLength = pStream->idxFrames[n].dwChunkLength;
	idx.dwChunkOffset = pStream->idxFrames[n].dwChunkOffset
	  - This->dwMoviChunkPos;

	if (mmioWrite(This->hmmio, (HPSTR)&idx, sizeof(idx)) != sizeof(idx))
	  return AVIERR_FILEWRITE;
      }
    }
  } /* if not interleaved */

  if (mmioAscend(This->hmmio, &ck, 0) != S_OK)
    return AVIERR_FILEWRITE;

  return AVIERR_OK;
}

static ULONG  AVIFILE_SearchStream(IAVIFileImpl *This, DWORD fcc, LONG lSkip)
{
  UINT i;
  UINT nStream;

  /* pre-condition */
  assert(lSkip >= 0);

  if (fcc != 0) {
    /* search the number of the specified stream */
    nStream = (ULONG)-1;
    for (i = 0; i < This->fInfo.dwStreams; i++) {
      assert(This->ppStreams[i] != NULL);

      if (This->ppStreams[i]->sInfo.fccType == fcc) {
	if (lSkip == 0) {
	  nStream = i;
	  break;
	} else
	  lSkip--;
      }
    }
  } else
    nStream = lSkip;

  return nStream;
}

static void    AVIFILE_UpdateInfo(IAVIFileImpl *This)
{
  UINT i;

  /* pre-conditions */
  assert(This != NULL);

  This->fInfo.dwMaxBytesPerSec      = 0;
  This->fInfo.dwCaps                = AVIFILECAPS_CANREAD|AVIFILECAPS_CANWRITE;
  This->fInfo.dwSuggestedBufferSize = 0;
  This->fInfo.dwWidth               = 0;
  This->fInfo.dwHeight              = 0;
  This->fInfo.dwScale               = 0;
  This->fInfo.dwRate                = 0;
  This->fInfo.dwLength              = 0;
2505
  This->dwInitialFrames             = 0;
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  for (i = 0; i < This->fInfo.dwStreams; i++) {
    AVISTREAMINFOW *psi;
    DWORD           n;

    /* pre-conditions */
    assert(This->ppStreams[i] != NULL);

    psi = &This->ppStreams[i]->sInfo;
    assert(psi->dwScale != 0);
    assert(psi->dwRate != 0);

    if (i == 0) {
      /* use first stream timings as base */
      This->fInfo.dwScale  = psi->dwScale;
      This->fInfo.dwRate   = psi->dwRate;
      This->fInfo.dwLength = psi->dwLength;
    } else {
      n = AVIStreamSampleToSample((PAVISTREAM)This->ppStreams[0],
				  (PAVISTREAM)This->ppStreams[i],psi->dwLength);
      if (This->fInfo.dwLength < n)
	This->fInfo.dwLength = n;
    }

2530 2531 2532
    if (This->dwInitialFrames < psi->dwInitialFrames)
      This->dwInitialFrames = psi->dwInitialFrames;

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    if (This->fInfo.dwSuggestedBufferSize < psi->dwSuggestedBufferSize)
      This->fInfo.dwSuggestedBufferSize = psi->dwSuggestedBufferSize;

    if (psi->dwSampleSize != 0) {
      /* fixed sample size -- exact computation */
      This->fInfo.dwMaxBytesPerSec += MulDiv(psi->dwSampleSize, psi->dwRate,
					     psi->dwScale);
    } else {
      /* variable sample size -- only upper limit */
      This->fInfo.dwMaxBytesPerSec += MulDiv(psi->dwSuggestedBufferSize,
					     psi->dwRate, psi->dwScale);

      /* update dimensions */
      n = psi->rcFrame.right - psi->rcFrame.left;
      if (This->fInfo.dwWidth < n)
	This->fInfo.dwWidth = n;
      n = psi->rcFrame.bottom - psi->rcFrame.top;
      if (This->fInfo.dwHeight < n)
	This->fInfo.dwHeight = n;
    }
  }
}

static HRESULT AVIFILE_WriteBlock(IAVIStreamImpl *This, DWORD block,
				  FOURCC ckid, DWORD flags, LPVOID buffer,
				  LONG size)
{
  MMCKINFO ck;

  ck.ckid    = ckid;
  ck.cksize  = size;
  ck.fccType = 0;

  /* if no frame/block is already written, we must compute start of movi chunk */
  if (This->paf->dwMoviChunkPos == 0)
    AVIFILE_ComputeMoviStart(This->paf);

  if (mmioSeek(This->paf->hmmio, This->paf->dwNextFramePos, SEEK_SET) == -1)
    return AVIERR_FILEWRITE;

  if (mmioCreateChunk(This->paf->hmmio, &ck, 0) != S_OK)
    return AVIERR_FILEWRITE;
  if (buffer != NULL && size > 0) {
    if (mmioWrite(This->paf->hmmio, (HPSTR)buffer, size) != size)
      return AVIERR_FILEWRITE;
  }
  if (mmioAscend(This->paf->hmmio, &ck, 0) != S_OK)
    return AVIERR_FILEWRITE;

  This->paf->fDirty         = TRUE;
2583
  This->paf->dwNextFramePos = mmioSeek(This->paf->hmmio, 0, SEEK_CUR);
2584

2585 2586
  return AVIFILE_AddFrame(This, ckid, size,
			  ck.dwDataOffset - 2 * sizeof(DWORD), flags);
2587
}