mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
102 lines
4.1 KiB
102 lines
4.1 KiB
//
|
|
// dmstrm.h
|
|
//
|
|
// Copyright (c) 1995-1998 Microsoft Corporation. All rights reserved.
|
|
//
|
|
|
|
|
|
#ifndef DMSTRM_H
|
|
#define DMSTRM_H
|
|
|
|
DEFINE_GUID(IID_IDMStream, 0x1894c260, 0xaa21, 0x11d1, 0x86, 0xbc, 0x0, 0xc0, 0x4f, 0xbf, 0x8f, 0xef);
|
|
|
|
DECLARE_INTERFACE_(IDMStream, IUnknown)
|
|
{
|
|
// IUnknown
|
|
STDMETHOD(QueryInterface) (THIS_ REFIID, LPVOID FAR *) PURE;
|
|
STDMETHOD_(ULONG,AddRef) (THIS) PURE;
|
|
STDMETHOD_(ULONG,Release) (THIS) PURE;
|
|
|
|
// IDMStream
|
|
STDMETHOD(Init) (THIS_ IStream* pStream) PURE;
|
|
STDMETHOD(Descend) (THIS_ LPMMCKINFO lpck, LPMMCKINFO lpckParent, UINT wFlags) PURE;
|
|
STDMETHOD(Ascend) (THIS_ LPMMCKINFO lpck, UINT wFlags) PURE;
|
|
STDMETHOD(CreateChunk) (THIS_ LPMMCKINFO lpck, UINT wFlags) PURE;
|
|
STDMETHOD(SetStream) (THIS_ IStream* pIStream) PURE;
|
|
STDMETHOD_(IStream*, GetStream) (THIS) PURE;
|
|
};
|
|
|
|
STDAPI AllocDirectMusicStream(IStream* pIStream, IDMStream** ppIDMStream);
|
|
|
|
class CDirectMusicStream : public IDMStream
|
|
{
|
|
public:
|
|
|
|
CDirectMusicStream();
|
|
~CDirectMusicStream();
|
|
|
|
STDMETHODIMP Init(IStream* pStream);
|
|
|
|
// IUnknown
|
|
STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppvObj);
|
|
STDMETHODIMP_(ULONG) AddRef();
|
|
STDMETHODIMP_(ULONG) Release();
|
|
|
|
// IDMStream
|
|
STDMETHODIMP Descend(LPMMCKINFO lpck, LPMMCKINFO lpckParent, UINT wFlags);
|
|
STDMETHODIMP Ascend(LPMMCKINFO lpck, UINT wFlags);
|
|
STDMETHODIMP CreateChunk(LPMMCKINFO lpck, UINT wFlags);
|
|
|
|
STDMETHODIMP SetStream(IStream* pStream);
|
|
STDMETHODIMP_(IStream*) GetStream();
|
|
|
|
private:
|
|
long m_cRef; // object reference count
|
|
IStream* m_pStream; // stream to operate on
|
|
};
|
|
|
|
// Macro to round up an odd size to RIFF 16 bit boundary.
|
|
#define RIFF_ALIGN(dwSize) (dwSize + (dwSize & 1))
|
|
|
|
typedef struct _RIFFIO
|
|
{
|
|
FOURCC ckid; /* chunk ID */
|
|
long cksize; /* chunk size */
|
|
FOURCC fccType; /* form type or list type */
|
|
long lRead; /* How much of this chunk has been read so far. */
|
|
_RIFFIO * pParent; /* pointer to parent chunk */
|
|
LARGE_INTEGER liPosition; /* Filled in by MarkPosition() when handing stream to another component. */
|
|
} RIFFIO;
|
|
|
|
|
|
class CRiffParser
|
|
{
|
|
public:
|
|
CRiffParser(IStream *pStream);
|
|
void DebugOn() { m_fDebugOn = TRUE; } // Turns on tracing of parsing. Only available in debug builds.
|
|
BOOL NextChunk(HRESULT * pHr); // Does the work of LeaveChunk, MoreChunks, and EnterChunk in one call.
|
|
void EnterList(RIFFIO *pChunk); // Descend into a new list.
|
|
void LeaveList(); // Pop out of the current list.
|
|
BOOL MoreChunks(); // Returns true if there are more chunks to process in this LIST or RIFF.
|
|
HRESULT EnterChunk(); // Reads header of next chunk in this LIST or RIFF container.
|
|
HRESULT LeaveChunk(); // Move to the end of the current chunk in the LIST or RIFF.
|
|
void MarkPosition(); // Stores the absolute position of the start of the current chunk.
|
|
HRESULT SeekBack(); // Scan back to the beginning of the current chunk.
|
|
HRESULT SeekForward(); // Scan forward to the end of the current chunk.
|
|
HRESULT Read(void *pv,ULONG cb); // Reads data from stream.
|
|
HRESULT Skip(ULONG ulBytes); // Seeks forward ulBytes.
|
|
void EnteringComponent() { m_fInComponent = true; }
|
|
BOOL ComponentFailed() { return m_fComponentFailed; }
|
|
IStream * GetStream() { return m_pStream; }
|
|
private:
|
|
BOOL m_fDebugOn; // Set true to turn tracing of parsing on.
|
|
BOOL m_fFirstPass; // Used by NextChunk to understand whether this is the first time in the list.
|
|
IStream * m_pStream; // Stream to operate on.
|
|
RIFFIO * m_pChunk; // Current chunk that we are in.
|
|
RIFFIO * m_pParent; // Parent chunk of current chunk.
|
|
long m_lRead; // How far we've read in the current chunk.
|
|
BOOL m_fComponentFailed; // Set true if a component failed to load, yet the file is okay.
|
|
BOOL m_fInComponent; // Set to true when inside a component's chunk.
|
|
};
|
|
|
|
#endif // #ifndef DMSTRM_H
|