static LONG WINAPI IAVIStream_fnFindSample(IAVIStream *iface, LONG pos, LONG flags)
{
IAVIFileImpl *This = impl_from_IAVIStream(iface);
TRACE("(%p,%d,0x%08X)\n",iface,pos,flags);
/* Do we have data? */
if (This->lpFormat == NULL)
return -1;
/* We don't have an index */
if (flags & FIND_INDEX)
return -1;
if (flags & FIND_FROM_START) {
pos = This->sInfo.dwStart;
flags &= ~(FIND_FROM_START|FIND_PREV);
flags |= FIND_NEXT;
}
if (flags & FIND_FORMAT) {
if ((flags & FIND_NEXT) && pos > 0)
pos = -1;
else
pos = 0;
}
if ((flags & FIND_RET) == FIND_LENGTH ||
(flags & FIND_RET) == FIND_SIZE)
return This->sInfo.dwSampleSize;
if ((flags & FIND_RET) == FIND_OFFSET)
return This->ckData.dwDataOffset + pos * This->sInfo.dwSampleSize;
return pos;
}
static LONG WINAPI IEditAVIStream_fnFindSample(IAVIStream*iface,LONG pos,
LONG flags)
{
IAVIEditStreamImpl *This = impl_from_IAVIStream( iface );
PAVISTREAM stream;
DWORD streamPos, streamNr;
TRACE("(%p,%d,0x%08X)\n",iface,pos,flags);
if (flags & FIND_FROM_START)
pos = (LONG)This->sInfo.dwStart;
/* outside of stream? */
if (pos < (LONG)This->sInfo.dwStart ||
(LONG)This->sInfo.dwStart + (LONG)This->sInfo.dwLength <= pos)
return -1;
/* map our position to a stream and position in it */
if (AVIFILE_FindStreamInTable(This, pos, &stream, &streamPos,
&streamNr, TRUE) != S_OK)
return -1; /* doesn't exist */
if (This->bDecompress) {
/* only one stream -- format changes only at start */
if (flags & FIND_FORMAT)
return (flags & FIND_NEXT ? -1 : 0);
/* FIXME: map positions back to us */
return IAVIStream_FindSample(stream, streamPos, flags);
} else {
/* assume change of format every frame */
return pos;
}
}
static HRESULT WINAPI IAVIStream_fnReadFormat(IAVIStream *iface, LONG pos, void *format,
LONG *formatsize)
{
IAVIFileImpl *This = impl_from_IAVIStream(iface);
TRACE("(%p,%d,%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) */
memcpy(format, This->lpFormat, min(*formatsize, This->cbFormat));
if (*formatsize < This->cbFormat) {
*formatsize = This->cbFormat;
return AVIERR_BUFFERTOOSMALL;
}
*formatsize = This->cbFormat;
return AVIERR_OK;
}
static HRESULT WINAPI IEditAVIStream_fnCreate(IAVIStream*iface,
LPARAM lParam1,LPARAM lParam2)
{
IAVIEditStreamImpl *This = impl_from_IAVIStream( iface );
if (lParam2 != 0)
return AVIERR_ERROR;
if (This->pStreams == NULL) {
This->pStreams = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, 256 * sizeof(EditStreamTable));
if (This->pStreams == NULL)
return AVIERR_MEMORY;
This->nTableSize = 256;
}
if (lParam1 != 0) {
IAVIStream_Info((PAVISTREAM)lParam1, &This->sInfo, sizeof(This->sInfo));
IAVIStream_AddRef((PAVISTREAM)lParam1);
This->pStreams[0].pStream = (PAVISTREAM)lParam1;
This->pStreams[0].dwStart = This->sInfo.dwStart;
This->pStreams[0].dwLength = This->sInfo.dwLength;
This->nStreams = 1;
}
return AVIERR_OK;
}
static HRESULT WINAPI IEditAVIStream_fnSetInfo(IAVIStream*iface,
AVISTREAMINFOW*info,LONG len)
{
IAVIEditStreamImpl *This = impl_from_IAVIStream( iface );
TRACE("(%p,%p,%d)\n",iface,info,len);
return IAVIEditStream_SetInfo(&This->IAVIEditStream_iface,info,len);
}
static HRESULT WINAPI ICMStream_fnDelete(IAVIStream *iface, LONG start,
LONG samples)
{
IAVIStreamImpl *This = impl_from_IAVIStream(iface);
TRACE("(%p,%d,%d)\n", iface, start, samples);
return IAVIStream_Delete(This->pStream, start, samples);
}
static HRESULT WINAPI IEditAVIStream_fnDelete(IAVIStream*iface,LONG start,
LONG samples)
{
IAVIEditStreamImpl *This = impl_from_IAVIStream( iface );
TRACE("(%p,%d,%d)\n",iface,start,samples);
return IAVIEditStream_Cut(&This->IAVIEditStream_iface,&start,&samples,NULL);
}
static HRESULT WINAPI IAVIStream_fnSetFormat(IAVIStream *iface, LONG pos, void *format,
LONG formatsize)
{
IAVIFileImpl *This = impl_from_IAVIStream(iface);
TRACE("(%p,%d,%p,%d)\n", iface, pos, format, formatsize);
/* check parameters */
if (format == NULL || formatsize <= sizeof(PCMWAVEFORMAT))
return AVIERR_BADPARAM;
/* We can only do this to an empty wave file, but ignore call
* if still same format */
if (This->lpFormat != NULL) {
if (formatsize != This->cbFormat ||
memcmp(format, This->lpFormat, formatsize) != 0)
return AVIERR_UNSUPPORTED;
return AVIERR_OK;
}
/* only support start at position 0 */
if (pos != 0)
return AVIERR_UNSUPPORTED;
/* Do we have write permission? */
if ((This->uMode & MMIO_RWMODE) == 0)
return AVIERR_READONLY;
/* get memory for format and copy it */
This->lpFormat = HeapAlloc(GetProcessHeap(), 0, formatsize);
if (This->lpFormat == NULL)
return AVIERR_MEMORY;
This->cbFormat = formatsize;
memcpy(This->lpFormat, format, formatsize);
/* update info's about 'data' chunk */
This->ckData.dwDataOffset = formatsize + 7 * sizeof(DWORD);
This->ckData.cksize = 0;
/* for non-pcm format we need also a 'fact' chunk */
if (This->lpFormat->wFormatTag != WAVE_FORMAT_PCM)
This->ckData.dwDataOffset += 3 * sizeof(DWORD);
/* update stream and file info */
This->sInfo.dwSampleSize = This->lpFormat->nBlockAlign;
This->sInfo.dwScale = This->lpFormat->nBlockAlign;
This->sInfo.dwRate = This->lpFormat->nAvgBytesPerSec;
This->sInfo.dwLength = 0;
This->sInfo.dwSuggestedBufferSize = 0;
return AVIERR_OK;
}
static HRESULT WINAPI ICMStream_fnWriteData(IAVIStream *iface, DWORD fcc,
LPVOID lp, LONG size)
{
IAVIStreamImpl *This = impl_from_IAVIStream(iface);
TRACE("(%p,0x%08x,%p,%d)\n", iface, fcc, lp, size);
assert(This->pStream != NULL);
return IAVIStream_WriteData(This->pStream, fcc, lp, size);
}
static HRESULT WINAPI ICMStream_fnReadData(IAVIStream *iface, DWORD fcc,
LPVOID lp, LPLONG lpread)
{
IAVIStreamImpl *This = impl_from_IAVIStream(iface);
TRACE("(%p,0x%08X,%p,%p)\n", iface, fcc, lp, lpread);
assert(This->pStream != NULL);
return IAVIStream_ReadData(This->pStream, fcc, lp, lpread);
}
static ULONG WINAPI ICMStream_fnRelease(IAVIStream* iface)
{
IAVIStreamImpl *This = impl_from_IAVIStream(iface);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) -> %d\n", iface, ref);
if (ref == 0) {
/* destruct */
if (This->pg != NULL) {
AVIStreamGetFrameClose(This->pg);
This->pg = NULL;
}
if (This->pStream != NULL) {
IAVIStream_Release(This->pStream);
This->pStream = NULL;
}
if (This->hic != NULL) {
if (This->lpbiPrev != NULL) {
ICDecompressEnd(This->hic);
HeapFree(GetProcessHeap(), 0, This->lpbiPrev);
This->lpbiPrev = NULL;
This->lpPrev = NULL;
}
ICCompressEnd(This->hic);
This->hic = NULL;
}
if (This->lpbiCur != NULL) {
HeapFree(GetProcessHeap(), 0, This->lpbiCur);
This->lpbiCur = NULL;
This->lpCur = NULL;
}
if (This->lpbiOutput != NULL) {
HeapFree(GetProcessHeap(), 0, This->lpbiOutput);
This->lpbiOutput = NULL;
This->cbOutput = 0;
}
if (This->lpbiInput != NULL) {
HeapFree(GetProcessHeap(), 0, This->lpbiInput);
This->lpbiInput = NULL;
This->cbInput = 0;
}
HeapFree(GetProcessHeap(), 0, This);
return 0;
}
/* also release reference to the nested stream */
if (This->pStream != NULL)
IAVIStream_Release(This->pStream);
return ref;
}
static HRESULT WINAPI IAVIStream_fnWrite(IAVIStream *iface, LONG start, LONG samples, void *buffer,
LONG buffersize, DWORD flags, LONG *sampwritten, LONG *byteswritten)
{
IAVIFileImpl *This = impl_from_IAVIStream(iface);
TRACE("(%p,%d,%d,%p,%d,0x%08X,%p,%p)\n", iface, start, samples,
buffer, buffersize, flags, sampwritten, byteswritten);
/* clear return parameters if given */
if (sampwritten != NULL)
*sampwritten = 0;
if (byteswritten != NULL)
*byteswritten = 0;
/* check parameters */
if (buffer == NULL && (buffersize > 0 || samples > 0))
return AVIERR_BADPARAM;
/* Do we have write permission? */
if ((This->uMode & MMIO_RWMODE) == 0)
return AVIERR_READONLY;
/* < 0 means "append" */
if (start < 0)
start = This->sInfo.dwStart + This->sInfo.dwLength;
/* check buffersize -- must multiple of samplesize */
if (buffersize & ~(This->sInfo.dwSampleSize - 1))
return AVIERR_BADSIZE;
/* do we have anything to write? */
if (buffer != NULL && buffersize > 0) {
This->fDirty = TRUE;
if (mmioSeek(This->hmmio, This->ckData.dwDataOffset +
start * This->sInfo.dwSampleSize, SEEK_SET) == -1)
return AVIERR_FILEWRITE;
if (mmioWrite(This->hmmio, buffer, buffersize) != buffersize)
return AVIERR_FILEWRITE;
This->sInfo.dwLength = max(This->sInfo.dwLength, (DWORD)start + samples);
This->ckData.cksize = max(This->ckData.cksize,
start * This->sInfo.dwSampleSize + buffersize);
/* fill out return parameters if given */
if (sampwritten != NULL)
*sampwritten = samples;
if (byteswritten != NULL)
*byteswritten = buffersize;
}
return AVIERR_OK;
}
static ULONG WINAPI ICMStream_fnAddRef(IAVIStream *iface)
{
IAVIStreamImpl *This = impl_from_IAVIStream(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) -> %d\n", iface, ref);
/* also add reference to the nested stream */
if (This->pStream != NULL)
IAVIStream_AddRef(This->pStream);
return ref;
}
static HRESULT WINAPI ICMStream_fnReadFormat(IAVIStream *iface, LONG pos,
LPVOID format, LONG *formatsize)
{
IAVIStreamImpl *This = impl_from_IAVIStream(iface);
LPBITMAPINFOHEADER lpbi;
HRESULT hr;
TRACE("(%p,%d,%p,%p)\n", iface, pos, format, formatsize);
if (formatsize == NULL)
return AVIERR_BADPARAM;
if (This->pg == NULL) {
hr = AVIFILE_OpenGetFrame(This);
if (FAILED(hr))
return hr;
}
lpbi = AVIStreamGetFrame(This->pg, pos);
if (lpbi == NULL)
return AVIERR_MEMORY;
if (This->hic == NULL) {
LONG size = lpbi->biSize + lpbi->biClrUsed * sizeof(RGBQUAD);
if (size > 0) {
if (This->sInfo.dwSuggestedBufferSize < lpbi->biSizeImage)
This->sInfo.dwSuggestedBufferSize = lpbi->biSizeImage;
This->cbOutput = size;
if (format != NULL) {
if (This->lpbiOutput != NULL)
memcpy(format, This->lpbiOutput, min(*formatsize, This->cbOutput));
else
memcpy(format, lpbi, min(*formatsize, size));
}
}
} else if (format != NULL)
memcpy(format, This->lpbiOutput, min(*formatsize, This->cbOutput));
if (*formatsize < This->cbOutput)
hr = AVIERR_BUFFERTOOSMALL;
else
hr = AVIERR_OK;
*formatsize = This->cbOutput;
return hr;
}
static HRESULT WINAPI ICMStream_fnWrite(IAVIStream *iface, LONG start,
LONG samples, LPVOID buffer,
LONG buffersize, DWORD flags,
LPLONG sampwritten,
LPLONG byteswritten)
{
IAVIStreamImpl *This = impl_from_IAVIStream(iface);
HRESULT hr;
TRACE("(%p,%d,%d,%p,%d,0x%08X,%p,%p)\n", iface, start, samples,
buffer, buffersize, flags, sampwritten, byteswritten);
/* clear return parameters if given */
if (sampwritten != NULL)
*sampwritten = 0;
if (byteswritten != NULL)
*byteswritten = 0;
/* check parameters */
if (buffer == NULL && (buffersize > 0 || samples > 0))
return AVIERR_BADPARAM;
if (This->sInfo.fccHandler == comptypeDIB) {
/* only pass through */
flags |= AVIIF_KEYFRAME;
return IAVIStream_Write(This->pStream, start, samples, buffer, buffersize,
flags, sampwritten, byteswritten);
} else {
/* compress data before writing to pStream */
if (samples != 1 && (sampwritten == NULL && byteswritten == NULL))
return AVIERR_UNSUPPORTED;
This->lCurrent = start;
hr = AVIFILE_EncodeFrame(This, This->lpbiInput, buffer);
if (FAILED(hr))
return hr;
if (This->lLastKey == start)
flags |= AVIIF_KEYFRAME;
return IAVIStream_Write(This->pStream, start, samples, This->lpCur,
This->lpbiCur->biSizeImage, flags, byteswritten,
sampwritten);
}
}
static HRESULT WINAPI ICMStream_fnQueryInterface(IAVIStream *iface,
REFIID refiid, LPVOID *obj)
{
IAVIStreamImpl *This = impl_from_IAVIStream(iface);
TRACE("(%p,%s,%p)\n", iface, debugstr_guid(refiid), obj);
if (IsEqualGUID(&IID_IUnknown, refiid) ||
IsEqualGUID(&IID_IAVIStream, refiid)) {
*obj = &This->IAVIStream_iface;
IAVIStream_AddRef(iface);
return S_OK;
}
return OLE_E_ENUM_NOMORE;
}
static HRESULT WINAPI IAVIStream_fnInfo(IAVIStream *iface, AVISTREAMINFOW *psi, LONG size)
{
IAVIFileImpl *This = impl_from_IAVIStream(iface);
TRACE("(%p,%p,%d)\n", iface, psi, size);
if (psi == NULL)
return AVIERR_BADPARAM;
if (size < 0)
return AVIERR_BADSIZE;
memcpy(psi, &This->sInfo, min((DWORD)size, sizeof(This->sInfo)));
if ((DWORD)size < sizeof(This->sInfo))
return AVIERR_BUFFERTOOSMALL;
return AVIERR_OK;
}
static HRESULT WINAPI IAVIStream_fnDelete(IAVIStream *iface, LONG start, LONG samples)
{
IAVIFileImpl *This = impl_from_IAVIStream(iface);
TRACE("(%p,%d,%d)\n", iface, start, samples);
/* check parameters */
if (start < 0 || samples < 0)
return AVIERR_BADPARAM;
/* Delete before start of stream? */
if ((DWORD)(start + samples) < This->sInfo.dwStart)
return AVIERR_OK;
/* Delete after end of stream? */
if ((DWORD)start > This->sInfo.dwLength)
return AVIERR_OK;
/* For the rest we need write permissions */
if ((This->uMode & MMIO_RWMODE) == 0)
return AVIERR_READONLY;
if ((DWORD)(start + samples) >= This->sInfo.dwLength) {
/* deletion at end */
samples = This->sInfo.dwLength - start;
This->sInfo.dwLength -= samples;
This->ckData.cksize -= samples * This->sInfo.dwSampleSize;
} else if ((DWORD)start <= This->sInfo.dwStart) {
/* deletion at start */
samples = This->sInfo.dwStart - start;
start = This->sInfo.dwStart;
This->ckData.dwDataOffset += samples * This->sInfo.dwSampleSize;
This->ckData.cksize -= samples * This->sInfo.dwSampleSize;
} else {
/* deletion inside stream -- needs playlist and cue's */
FIXME(": deletion inside of stream not supported!\n");
return AVIERR_UNSUPPORTED;
}
This->fDirty = TRUE;
return AVIERR_OK;
}
static HRESULT WINAPI IEditAVIStream_fnReadFormat(IAVIStream*iface,LONG pos,
LPVOID format,LONG*fmtsize)
{
IAVIEditStreamImpl *This = impl_from_IAVIStream( iface );
LPBITMAPINFOHEADER lp;
PAVISTREAM stream;
DWORD n;
HRESULT hr;
TRACE("(%p,%d,%p,%p)\n",iface,pos,format,fmtsize);
if (fmtsize == NULL || pos < This->sInfo.dwStart ||
This->sInfo.dwStart + This->sInfo.dwLength <= pos)
return AVIERR_BADPARAM;
/* find stream corresponding to position */
hr = AVIFILE_FindStreamInTable(This, pos, &stream, &n, NULL, FALSE);
if (FAILED(hr))
return hr;
if (! This->bDecompress)
return IAVIStream_ReadFormat(stream, n, format, fmtsize);
lp = AVIFILE_ReadFrame(This, stream, n);
if (lp == NULL)
return AVIERR_ERROR;
if (lp->biBitCount <= 8) {
n = (lp->biClrUsed > 0 ? lp->biClrUsed : 1 << lp->biBitCount);
n *= sizeof(RGBQUAD);
} else
n = 0;
n += lp->biSize;
memcpy(format, lp, min((LONG)n, *fmtsize));
hr = ((LONG)n > *fmtsize ? AVIERR_BUFFERTOOSMALL : AVIERR_OK);
*fmtsize = n;
return hr;
}
static HRESULT WINAPI IEditAVIStream_fnReadData(IAVIStream*iface,DWORD fcc,
LPVOID lp,LONG *lpread)
{
IAVIEditStreamImpl *This = impl_from_IAVIStream( iface );
DWORD n;
TRACE("(%p,0x%08X,%p,%p)\n",iface,fcc,lp,lpread);
/* check parameters */
if (lp == NULL || lpread == NULL)
return AVIERR_BADPARAM;
/* simply ask every stream and return the first block found */
for (n = 0; n < This->nStreams; n++) {
HRESULT hr = IAVIStream_ReadData(This->pStreams[n].pStream,fcc,lp,lpread);
if (SUCCEEDED(hr))
return hr;
}
*lpread = 0;
return AVIERR_NODATA;
}
static LONG WINAPI ICMStream_fnFindSample(IAVIStream *iface, LONG pos,
LONG flags)
{
IAVIStreamImpl *This = impl_from_IAVIStream(iface);
TRACE("(%p,%d,0x%08X)\n",iface,pos,flags);
if (flags & FIND_FROM_START) {
pos = This->sInfo.dwStart;
flags &= ~(FIND_FROM_START|FIND_PREV);
flags |= FIND_NEXT;
}
if (flags & FIND_RET)
WARN(": FIND_RET flags will be ignored!\n");
if (flags & FIND_KEY) {
if (This->hic == NULL)
return pos; /* we decompress so every frame is a keyframe */
if (flags & FIND_PREV) {
/* need to read old or new frames? */
if (This->lLastKey <= pos || pos < This->lCurrent)
IAVIStream_Read(iface, pos, 1, NULL, 0, NULL, NULL);
return This->lLastKey;
}
} else if (flags & FIND_ANY) {
return pos; /* We really don't know, reread is too expensive, so guess. */
} else if (flags & FIND_FORMAT) {
if (flags & FIND_PREV)
return 0;
}
return -1;
}
static HRESULT WINAPI IAVIStream_fnRead(IAVIStream *iface, LONG start, LONG samples, void *buffer,
LONG buffersize, LONG *bytesread, LONG *samplesread)
{
IAVIFileImpl *This = impl_from_IAVIStream(iface);
TRACE("(%p,%d,%d,%p,%d,%p,%p)\n", iface, start, samples, buffer,
buffersize, bytesread, samplesread);
/* clear return parameters if given */
if (bytesread != NULL)
*bytesread = 0;
if (samplesread != NULL)
*samplesread = 0;
/* positions without data */
if (start < 0 || (DWORD)start > This->sInfo.dwLength)
return AVIERR_OK;
/* check samples */
if (samples < 0)
samples = 0;
if (buffersize > 0) {
if (samples > 0)
samples = min((DWORD)samples, buffersize / This->sInfo.dwSampleSize);
else
samples = buffersize / This->sInfo.dwSampleSize;
}
/* limit to end of stream */
if ((DWORD)(start + samples) > This->sInfo.dwLength)
samples = This->sInfo.dwLength - start;
/* request only the sizes? */
if (buffer == NULL || buffersize <= 0) {
/* then I need at least one parameter for it */
if (bytesread == NULL && samplesread == NULL)
return AVIERR_BADPARAM;
if (bytesread != NULL)
*bytesread = samples * This->sInfo.dwSampleSize;
if (samplesread != NULL)
*samplesread = samples;
return AVIERR_OK;
}
/* nothing to read? */
if (samples == 0)
return AVIERR_OK;
/* Can I read at least one sample? */
if ((DWORD)buffersize < This->sInfo.dwSampleSize)
return AVIERR_BUFFERTOOSMALL;
buffersize = samples * This->sInfo.dwSampleSize;
if (mmioSeek(This->hmmio, This->ckData.dwDataOffset
+ start * This->sInfo.dwSampleSize, SEEK_SET) == -1)
return AVIERR_FILEREAD;
if (mmioRead(This->hmmio, buffer, buffersize) != buffersize)
return AVIERR_FILEREAD;
/* fill out return parameters if given */
if (bytesread != NULL)
*bytesread = buffersize;
if (samplesread != NULL)
*samplesread = samples;
return AVIERR_OK;
}
static HRESULT WINAPI IEditAVIStream_fnQueryInterface(IAVIStream*iface,
REFIID refiid,LPVOID*obj)
{
IAVIEditStreamImpl *This = impl_from_IAVIStream( iface );
return IAVIEditStream_QueryInterface(&This->IAVIEditStream_iface,refiid,obj);
}
static ULONG WINAPI IEditAVIStream_fnAddRef(IAVIStream*iface)
{
IAVIEditStreamImpl *This = impl_from_IAVIStream( iface );
return IAVIEditStream_AddRef(&This->IAVIEditStream_iface);
}
static ULONG WINAPI IEditAVIStream_fnRelease(IAVIStream*iface)
{
IAVIEditStreamImpl *This = impl_from_IAVIStream( iface );
return IAVIEditStream_Release(&This->IAVIEditStream_iface);
}
static HRESULT WINAPI IAVIStream_fnReadData(IAVIStream *iface, DWORD fcc, void *lp, LONG *lpread)
{
IAVIFileImpl *This = impl_from_IAVIStream(iface);
return IAVIFile_ReadData(&This->IAVIFile_iface, fcc, lp, lpread);
}
static ULONG WINAPI IAVIStream_fnRelease(IAVIStream* iface)
{
IAVIFileImpl *This = impl_from_IAVIStream(iface);
return IUnknown_Release(This->outer_unk);
}
static HRESULT WINAPI IAVIStream_fnQueryInterface(IAVIStream *iface, REFIID riid, void **ret_iface)
{
IAVIFileImpl *This = impl_from_IAVIStream(iface);
return IUnknown_QueryInterface(This->outer_unk, riid, ret_iface);
}
static HRESULT WINAPI IAVIStream_fnWriteData(IAVIStream *iface, DWORD fcc, void *lp, LONG size)
{
IAVIFileImpl *This = impl_from_IAVIStream(iface);
return IAVIFile_WriteData(&This->IAVIFile_iface, fcc, lp, size);
}
static HRESULT WINAPI IEditAVIStream_fnRead(IAVIStream*iface,LONG start,
LONG samples,LPVOID buffer,
LONG buffersize,LONG*bytesread,
LONG*samplesread)
{
IAVIEditStreamImpl *This = impl_from_IAVIStream( iface );
PAVISTREAM stream;
DWORD streamPos, streamNr;
LONG readBytes, readSamples, count;
HRESULT hr;
TRACE("(%p,%d,%d,%p,%d,%p,%p) -- 0x%08X\n",iface,start,samples,
buffer,buffersize,bytesread,samplesread,This->sInfo.fccType);
/* check parameters */
if (bytesread != NULL)
*bytesread = 0;
if (samplesread != NULL)
*samplesread = 0;
if (buffersize < 0)
return AVIERR_BADSIZE;
if ((DWORD)start < This->sInfo.dwStart ||
This->sInfo.dwStart + This->sInfo.dwLength < (DWORD)start)
return AVIERR_BADPARAM;
if (! This->bDecompress) {
/* audio like data -- sample-based */
do {
if (samples == 0)
return AVIERR_OK; /* nothing at all or already done */
if (FAILED(AVIFILE_FindStreamInTable(This, start, &stream,
&streamPos, &streamNr, FALSE)))
return AVIERR_ERROR;
/* limit to end of the stream */
count = samples;
if (streamPos + count > EditStreamEnd(This, streamNr))
count = EditStreamEnd(This, streamNr) - streamPos;
hr = IAVIStream_Read(stream, streamPos, count, buffer, buffersize,
&readBytes, &readSamples);
if (FAILED(hr))
return hr;
if (readBytes == 0 && readSamples == 0 && count != 0)
return AVIERR_FILEREAD; /* for bad stream implementations */
if (samplesread != NULL)
*samplesread += readSamples;
if (bytesread != NULL)
*bytesread += readBytes;
if (buffer != NULL) {
buffer = ((LPBYTE)buffer)+readBytes;
buffersize -= readBytes;
}
start += count;
samples -= count;
} while (This->sInfo.dwStart + This->sInfo.dwLength > start);
} else {
/* video like data -- frame-based */
LPBITMAPINFOHEADER lp;
if (samples == 0)
return AVIERR_OK;
if (FAILED(AVIFILE_FindStreamInTable(This, start, &stream,
&streamPos, &streamNr, FALSE)))
return AVIERR_ERROR;
lp = AVIFILE_ReadFrame(This, stream, streamPos);
if (lp == NULL)
return AVIERR_ERROR;
if (buffer != NULL) {
/* need size of format to skip */
if (lp->biBitCount <= 8) {
count = lp->biClrUsed > 0 ? lp->biClrUsed : 1 << lp->biBitCount;
count *= sizeof(RGBQUAD);
} else
count = 0;
count += lp->biSize;
if (buffersize < lp->biSizeImage)
return AVIERR_BUFFERTOOSMALL;
memcpy(buffer, (LPBYTE)lp + count, lp->biSizeImage);
}
if (bytesread != NULL)
*bytesread = lp->biSizeImage;
if (samplesread != NULL)
*samplesread = 1;
}
return AVIERR_OK;
}
