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111 lines
2.2 KiB
111 lines
2.2 KiB
15 years ago
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/*
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a buffer
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Copyright (C) 1999 Martin Vogt
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Library General Public License as published by
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the Free Software Foundation.
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For more information look at the file COPYRIGHT in this package
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*/
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#ifndef __MPEGVIDEOSTREAM_H
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#define __MPEGVIDEOSTREAM_H
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#include "startCodes.h"
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#include "mpegVideoHeader.h"
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#include "mpegSystemStream.h"
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#include "mpegVideoBitWindow.h"
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#define _BYTE_TEST 1024
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/**
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A really ugly class. Most of the methods have names
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which does not make it clear for what they are useful.
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(Don't touch a running system :-)
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We wrap the inputStream and offer functions for getting
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bits, appending to the internal buffer, flushing, syncing
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all this stuff.
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*/
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class MpegVideoStream {
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int size;
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InputStream* input;
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MpegSystemStream* mpegSystemStream;
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MpegSystemHeader* mpegSystemHeader;
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MpegVideoBitWindow* mpegVideoBitWindow;
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int lHasStream;
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public:
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MpegVideoStream(InputStream* input);
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~MpegVideoStream();
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// returns true if init successful
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int firstInitialize(MpegVideoHeader* mpegHeader);
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int nextGOP();
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int nextPIC();
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int next_start_code();
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int hasBytes(int bytes);
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int eof();
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inline void clear() {
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mpegVideoBitWindow->clear();
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}
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inline void flushBits(int bits) {
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hasBytes(_BYTE_TEST);
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mpegVideoBitWindow->flushBitsDirect(bits);
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}
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inline unsigned int showBits(int bits) {
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hasBytes(_BYTE_TEST);
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return mpegVideoBitWindow->showBits(bits);
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}
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inline unsigned int showBits32() {
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return mpegVideoBitWindow->showBits32();
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}
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inline unsigned int showBits16() {
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return mpegVideoBitWindow->showBits(16);
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}
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inline void flushBitsDirect(unsigned int bits) {
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mpegVideoBitWindow->flushBitsDirect(bits);
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}
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unsigned int getBits(int bits) {
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hasBytes(_BYTE_TEST);
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return mpegVideoBitWindow->getBits(bits);
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}
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inline void flushByteOffset() {
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mpegVideoBitWindow->flushByteOffset();
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}
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TimeStamp* getCurrentTimeStamp();
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private:
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int getByteDirect();
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int get_more_video_data();
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void fill_videoBuffer(MpegSystemHeader* mpegSystemHeader);
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int isStartCode(unsigned int data);
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};
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#endif
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