109 lines
2.5 KiB
C++
109 lines
2.5 KiB
C++
/*******************************************************************************
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/
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/ File: Buffer.h
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/
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/ Description: A BBuffer is a container of media data in the Media Kit
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/
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/ Copyright 1997-98, Be Incorporated, All Rights Reserved
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/
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*******************************************************************************/
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#if !defined(_BUFFER_H)
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#define _BUFFER_H
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#include <MediaDefs.h>
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/*** A BBuffer is not the same thing as the area segment that gets cloned ***/
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/*** For each buffer that gets created, a BBuffer object is created to represent ***/
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/*** it in each participant address space. ***/
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struct _shared_buffer_list;
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struct buffer_clone_info {
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buffer_clone_info();
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~buffer_clone_info();
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media_buffer_id buffer;
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area_id area;
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size_t offset;
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size_t size;
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int32 flags;
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private:
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uint32 _reserved_[4];
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};
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class BBuffer
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{
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public:
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void * Data(); /* returns NULL if buffer not correctly initialized */
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size_t SizeAvailable(); // total size of buffer (how much data can it hold)
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size_t SizeUsed(); // how much was written (how much data does it hold)
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void SetSizeUsed(
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size_t size_used);
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uint32 Flags();
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void Recycle();
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buffer_clone_info CloneInfo() const;
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media_buffer_id ID(); /* 0 if not registered */
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media_type Type();
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media_header * Header();
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media_audio_header * AudioHeader();
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media_video_header * VideoHeader();
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enum { /* for flags */
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B_F1_BUFFER = 0x1,
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B_F2_BUFFER = 0x2,
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B_SMALL_BUFFER = 0x80000000
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};
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size_t Size(); // deprecated; use SizeAvailable()
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private:
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friend struct _buffer_id_cache;
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friend struct _shared_buffer_list;
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friend class BMediaRoster;
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friend class BBufferProducer;
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friend class BBufferConsumer; /* for buffer receiving */
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friend class BBufferGroup;
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friend class BSmallBuffer;
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explicit BBuffer(const buffer_clone_info & info);
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~BBuffer(); /* BBuffer is NOT a virtual class!!! */
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BBuffer(); /* not implemented */
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BBuffer(const BBuffer & clone); /* not implemented */
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BBuffer & operator=(const BBuffer & clone); /* not implemented */
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void SetHeader(const media_header *header);
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media_header fMediaHeader;
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_shared_buffer_list * fBufferList;
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area_id fArea;
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void * fData;
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size_t fOffset;
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size_t fSize;
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media_buffer_id fBufferID;
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int32 fFlags;
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uint32 _reserved_buffer_[11];
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};
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class BSmallBuffer : public BBuffer
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{
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public:
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BSmallBuffer();
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static size_t SmallBufferSizeLimit();
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};
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#endif /* _BUFFER_H */
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