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109 lines
2.7 KiB
109 lines
2.7 KiB
// Copyright (c) 1999 Microsoft Corporation. All Rights Reserved.
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//
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// dmort.cpp - DMO runtime misc.
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//
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#include <windows.h>
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#include "mediaobj.h"
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#include "dmort.h"
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//
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// Mediatype stuff
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//
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STDAPI MoInitMediaType(DMO_MEDIA_TYPE *pmt, ULONG cbFormat) {
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if (!pmt)
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return E_POINTER;
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pmt->pUnk = NULL;
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if (cbFormat) {
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pmt->pbFormat = (PBYTE)CoTaskMemAlloc(cbFormat);
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if (!pmt->pbFormat)
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return E_OUTOFMEMORY;
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}
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else
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pmt->pbFormat = NULL;
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pmt->cbFormat = cbFormat;
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return NOERROR;
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}
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STDAPI MoFreeMediaType(DMO_MEDIA_TYPE *pmt) {
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if (!pmt)
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return E_POINTER;
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if (pmt->pUnk) {
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pmt->pUnk->Release();
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pmt->pUnk = NULL;
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}
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if (pmt->pbFormat) {
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CoTaskMemFree(pmt->pbFormat);
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pmt->pbFormat = NULL;
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}
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return NOERROR;
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}
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// everything has been allocated - just copy
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void CopyMediaTypeInternal(DMO_MEDIA_TYPE *pmtDest, DMO_MEDIA_TYPE const *pmtSrc) {
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if (pmtDest->cbFormat)
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memcpy(pmtDest->pbFormat, pmtSrc->pbFormat, pmtDest->cbFormat);
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if (pmtSrc->pUnk) {
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pmtSrc->pUnk->AddRef();
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pmtDest->pUnk = pmtSrc->pUnk;
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}
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pmtDest->majortype = pmtSrc->majortype;
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pmtDest->subtype = pmtSrc->subtype;
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pmtDest->bFixedSizeSamples = pmtSrc->bFixedSizeSamples;
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pmtDest->bTemporalCompression = pmtSrc->bTemporalCompression;
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pmtDest->lSampleSize = pmtSrc->lSampleSize;
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pmtDest->formattype = pmtSrc->formattype;
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}
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STDAPI MoCopyMediaType(DMO_MEDIA_TYPE *pmtDest, DMO_MEDIA_TYPE const *pmtSrc) {
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if ((!pmtDest) || (!pmtSrc))
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return E_POINTER;
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ULONG cbFormat = pmtSrc->pbFormat ? pmtSrc->cbFormat : 0;
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HRESULT hr = MoInitMediaType(pmtDest, cbFormat);
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if (FAILED(hr))
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return hr;
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CopyMediaTypeInternal(pmtDest, pmtSrc);
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return NOERROR;
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}
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STDAPI MoCreateMediaType(DMO_MEDIA_TYPE **ppmt, ULONG cbFormat) {
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if (!ppmt)
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return E_POINTER;
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*ppmt = (DMO_MEDIA_TYPE*) CoTaskMemAlloc(sizeof(DMO_MEDIA_TYPE));
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if (!*ppmt)
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return E_OUTOFMEMORY;
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HRESULT hr = MoInitMediaType(*ppmt, cbFormat);
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if (FAILED(hr)) {
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CoTaskMemFree(*ppmt);
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*ppmt = NULL;
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}
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return hr;
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}
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STDAPI MoDeleteMediaType(DMO_MEDIA_TYPE *pmt) {
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if (!pmt)
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return E_POINTER;
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HRESULT hr = MoFreeMediaType(pmt);
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CoTaskMemFree(pmt);
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return hr;
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}
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STDAPI MoDuplicateMediaType(DMO_MEDIA_TYPE **ppmtDest, DMO_MEDIA_TYPE const *pmtSrc) {
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if (!ppmtDest || !pmtSrc)
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return E_POINTER;
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ULONG cbFormat = pmtSrc->pbFormat ? pmtSrc->cbFormat : 0;
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HRESULT hr = MoCreateMediaType(ppmtDest, cbFormat);
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if (FAILED(hr))
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return hr;
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CopyMediaTypeInternal(*ppmtDest, pmtSrc);
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return NOERROR;
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}
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