340 lines
7.8 KiB
C++
340 lines
7.8 KiB
C++
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/****************************************************************************
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*
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* AVIMEM.C
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*
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* routine for putting a stream interface on top of data in memory
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*
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* Copyright (c) 1992 - 1995 Microsoft Corporation. All Rights Reserved.
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*
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* You have a royalty-free right to use, modify, reproduce and
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* distribute the Sample Files (and/or any modified version) in
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* any way you find useful, provided that you agree that
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* Microsoft has no warranty obligations or liability for any
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* Sample Application Files which are modified.
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*
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***************************************************************************/
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#include <win32.h>
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#include <vfw.h>
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#include "avifilei.h"
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#include "avimem.h"
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#define WIDTHBYTES(i) ((UINT)((i+31)&(~31))/8)
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#define DIBWIDTHBYTES(lpbi) (UINT)WIDTHBYTES((UINT)(lpbi)->biWidth * (UINT)(lpbi)->biBitCount)
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STDAPI AVIMakeStreamFromClipboard(UINT cfFormat, HANDLE hGlobal, PAVISTREAM FAR *ppstream)
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{
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CAVIMemStream FAR* pAVIStream;
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HRESULT hr;
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LPVOID lp;
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if (cfFormat != CF_DIB && cfFormat != CF_WAVE)
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return ResultFromScode(AVIERR_UNSUPPORTED);
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pAVIStream = new FAR CAVIMemStream();
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if (!pAVIStream)
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return ResultFromScode(E_OUTOFMEMORY);
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lp = GlobalAllocPtr(GMEM_MOVEABLE, GlobalSize(hGlobal));
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if (!lp)
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return ResultFromScode(E_OUTOFMEMORY);
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hmemcpy(lp, GlobalLock(hGlobal), GlobalSize(hGlobal));
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pAVIStream->Create((LPARAM) cfFormat, (LPARAM) lp);
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GlobalUnlock(hGlobal);
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hr = pAVIStream->QueryInterface(IID_IAVIStream, (LPVOID FAR *) ppstream);
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if (FAILED(GetScode(hr)))
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delete pAVIStream;
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return hr;
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}
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/* - - - - - - - - */
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CAVIMemStream::CAVIMemStream()
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{
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m_lpData = NULL;
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m_lpMemory = NULL;
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m_lpFormat = NULL;
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m_refs = 0;
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}
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/* - - - - - - - - */
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STDMETHODIMP CAVIMemStream::QueryInterface(
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const IID FAR& iid,
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void FAR* FAR* ppv)
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{
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if (iid == IID_IUnknown)
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*ppv = this;
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else if (iid == IID_IAVIStream)
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*ppv = this;
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else {
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*ppv = NULL;
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return ResultFromScode(E_NOINTERFACE);
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}
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AddRef();
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return AVIERR_OK;
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}
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/* - - - - - - - - */
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STDMETHODIMP_(ULONG) CAVIMemStream::AddRef()
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{
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uUseCount++;
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return ++m_refs;
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}
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/* - - - - - - - - */
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STDMETHODIMP CAVIMemStream::Create(LPARAM lParam1, LPARAM lParam2)
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{
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UINT cfFormat = (UINT) lParam1;
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m_lpMemory = (LPVOID) lParam2;
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if (cfFormat == CF_DIB) {
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LPBITMAPINFOHEADER lpbi;
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m_lpFormat = m_lpMemory;
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lpbi = (LPBITMAPINFOHEADER) m_lpFormat;
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if (lpbi->biSizeImage == 0) {
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if (lpbi->biCompression = BI_RGB) {
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lpbi->biSizeImage = DIBWIDTHBYTES(lpbi) *
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lpbi->biHeight;
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}
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}
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_fmemset(&m_avistream, 0, sizeof(m_avistream));
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m_avistream.fccType = streamtypeVIDEO;
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m_avistream.fccHandler = 0;
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m_avistream.dwStart = 0;
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m_avistream.dwLength = 1;
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m_avistream.dwScale = 1;
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m_avistream.dwRate = 15;
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m_avistream.dwSampleSize = 0;
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SetRect(&m_avistream.rcFrame, 0, 0,
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(int) lpbi->biWidth,
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(int) lpbi->biHeight);
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m_cbFormat = lpbi->biSize + lpbi->biClrUsed * sizeof(RGBQUAD);
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m_lpData = (LPBYTE) m_lpMemory + m_cbFormat;
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m_cbData = lpbi->biSizeImage;
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} else if (cfFormat == CF_WAVE) {
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DWORD _huge * lpdw;
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LPWAVEFORMAT lpwf;
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#define ckidWAVEFORMAT mmioFOURCC('f', 'm', 't', ' ')
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#define ckidWAVEDATA mmioFOURCC('d', 'a', 't', 'a')
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lpdw = (DWORD _huge *) ((LPBYTE) m_lpMemory + 12);
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while (*lpdw != ckidWAVEFORMAT)
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lpdw = (DWORD _huge *)
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(((BYTE _huge *) lpdw) + lpdw[1] + sizeof(DWORD) * 2);
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m_lpFormat = (LPBYTE) (lpdw + 2);
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m_cbFormat = lpdw[1];
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do {
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lpdw = (DWORD _huge *)
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(((BYTE _huge *) lpdw) + lpdw[1] + sizeof(DWORD) * 2);
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} while (*lpdw != ckidWAVEDATA);
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m_lpData = (LPBYTE) (lpdw + 2);
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m_cbData = lpdw[1];
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lpwf = (LPWAVEFORMAT) m_lpFormat;
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_fmemset(&m_avistream, 0, sizeof(m_avistream));
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m_avistream.fccType = streamtypeAUDIO;
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m_avistream.fccHandler = 0;
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m_avistream.dwStart = 0;
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m_avistream.dwSampleSize = lpwf->nBlockAlign;
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m_avistream.dwLength = m_cbData / m_avistream.dwSampleSize;
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m_avistream.dwScale = lpwf->nBlockAlign;
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m_avistream.dwRate = lpwf->nAvgBytesPerSec;
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}
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return 0;
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}
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STDMETHODIMP_(ULONG) CAVIMemStream::Release()
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{
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uUseCount--;
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if (!--m_refs) {
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if (m_lpMemory) {
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GlobalFreePtr(m_lpMemory);
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}
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delete this;
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return 0;
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}
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return m_refs;
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}
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STDMETHODIMP CAVIMemStream::Info(AVISTREAMINFOW FAR * psi, LONG lSize)
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{
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hmemcpy(psi, &m_avistream, min(lSize, sizeof(m_avistream)));
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// return sizeof(m_avistream);
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return ResultFromScode(0);
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}
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STDMETHODIMP CAVIMemStream::ReadFormat(LONG lPos, LPVOID lpFormat, LONG FAR *lpcbFormat)
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{
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if (lpFormat) {
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hmemcpy(lpFormat, m_lpFormat, min(*lpcbFormat, (LONG) m_cbFormat));
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}
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*lpcbFormat = m_cbFormat;
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return AVIERR_OK;
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}
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STDMETHODIMP CAVIMemStream::Read(
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LONG lStart,
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LONG lSamples,
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LPVOID lpBuffer,
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LONG cbBuffer,
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LONG FAR * plBytes,
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LONG FAR * plSamples)
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{
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// !!! CONVENIENT?
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if (lStart + lSamples > (LONG) m_avistream.dwLength)
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lSamples = (LONG) m_avistream.dwLength - lStart;
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if (lSamples == 0 || lStart >= (LONG) m_avistream.dwLength) {
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if (plBytes)
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*plBytes = 0;
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if (plSamples)
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*plSamples = 0;
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}
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if (m_avistream.dwSampleSize) {
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if (lSamples > 0)
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lSamples = min(lSamples, cbBuffer / (LONG) m_avistream.dwSampleSize);
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else
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lSamples = cbBuffer / m_avistream.dwSampleSize;
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if (plBytes)
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*plBytes = lSamples * m_avistream.dwSampleSize;
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if (plSamples)
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*plSamples = lSamples;
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if (lpBuffer) {
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hmemcpy(lpBuffer,
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(BYTE _huge *) m_lpData + lStart * m_avistream.dwSampleSize,
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lSamples * m_avistream.dwSampleSize);
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if (cbBuffer < (LONG) m_avistream.dwSampleSize)
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return ResultFromScode(AVIERR_BUFFERTOOSMALL);
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}
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} else {
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if (plBytes)
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*plBytes = m_cbData;
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if (plSamples)
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*plSamples = 1;
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if (lpBuffer) {
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hmemcpy(lpBuffer, m_lpData, min(cbBuffer, m_cbData));
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if (cbBuffer < m_cbData)
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return ResultFromScode(AVIERR_BUFFERTOOSMALL);
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}
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}
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return AVIERR_OK;
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}
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STDMETHODIMP_(LONG) CAVIMemStream::FindSample(LONG lPos, LONG lFlags)
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{
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if (lFlags & FIND_FORMAT) {
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if (lFlags & FIND_PREV)
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return 0;
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else {
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if (lPos > 0)
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return -1;
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else
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return 0;
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}
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}
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return lPos;
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}
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STDMETHODIMP CAVIMemStream::SetFormat(LONG lPos,LPVOID lpFormat,LONG cbFormat)
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{
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return ResultFromScode(AVIERR_UNSUPPORTED);
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}
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STDMETHODIMP CAVIMemStream::Write(LONG lStart,
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LONG lSamples,
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LPVOID lpBuffer,
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LONG cbBuffer,
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DWORD dwFlags,
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LONG FAR *plSampWritten,
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LONG FAR *plBytesWritten)
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{
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return ResultFromScode(AVIERR_UNSUPPORTED);
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}
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STDMETHODIMP CAVIMemStream::Delete(LONG lStart,LONG lSamples)
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{
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return ResultFromScode(AVIERR_UNSUPPORTED);
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}
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STDMETHODIMP CAVIMemStream::ReadData(DWORD fcc, LPVOID lp, LONG FAR *lpcb)
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{
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return ResultFromScode(AVIERR_UNSUPPORTED);
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}
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STDMETHODIMP CAVIMemStream::WriteData(DWORD fcc, LPVOID lp, LONG cb)
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{
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return ResultFromScode(AVIERR_UNSUPPORTED);
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}
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#if 0
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STDMETHODIMP CAVIMemStream::Clone(PAVISTREAM FAR * ppaviNew)
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{
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return ResultFromScode(AVIERR_UNSUPPORTED);
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}
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#endif
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#ifdef _WIN32
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STDMETHODIMP CAVIMemStream::SetInfo(AVISTREAMINFOW FAR *lpInfo, LONG cbInfo)
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{
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return ResultFromScode(AVIERR_UNSUPPORTED);
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}
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#else
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STDMETHODIMP CAVIMemStream::Reserved1(void)
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{
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return ResultFromScode(AVIERR_UNSUPPORTED);
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}
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STDMETHODIMP CAVIMemStream::Reserved2(void)
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{
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return ResultFromScode(AVIERR_UNSUPPORTED);
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}
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STDMETHODIMP CAVIMemStream::Reserved3(void)
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{
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return ResultFromScode(AVIERR_UNSUPPORTED);
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}
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STDMETHODIMP CAVIMemStream::Reserved4(void)
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{
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return ResultFromScode(AVIERR_UNSUPPORTED);
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}
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STDMETHODIMP CAVIMemStream::Reserved5(void)
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{
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return ResultFromScode(AVIERR_UNSUPPORTED);
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}
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#endif
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