/usr/include/mjpegtools/mpeg2enc/elemstrmwriter.hh is in libmjpegtools-dev 1:2.1.0+debian-2.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 | #ifndef _ELEMSTREAMWRITER_HH
#define _ELEMSTREAMWRITER_HH
/* (C) 2003 Andrew Stevens */
/* This Software is free software; you can redistribute it
* and/or modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
*/
#include "mjpeg_types.h"
class EncoderParams;
class ElemStrmWriter
{
public:
ElemStrmWriter( );
virtual ~ElemStrmWriter() = 0;
virtual void WriteOutBufferUpto( const uint8_t *buffer, const uint32_t flush_upto ) = 0;
inline uint64_t Flushed() const { return flushed; }
virtual uint64_t BitCount() = 0;
protected:
uint64_t flushed;
};
/******************************
*
* Elementry stream buffer used to accumulate (byte-aligned) fragments ofencoded video. Currently
* each frame has its own buffer.
*
*****************************/
class OutputFragBuf
{
public:
OutputFragBuf();
virtual ~OutputFragBuf();
/**************
*
* Flush out buffer
* N.b. attempts to flush in non byte-aligned states are illegal
* and will abort
*
*************/
virtual void FlushBuffer() = 0;
/**************
*
* Reset buffer - empty buffer discarding current contents.
*
* ***********/
virtual void ResetBuffer() = 0;
/**************
*
* Write rightmost (least significant) n (0<=n<=32) bits of val to current buffer
*
*************/
virtual void PutBits( uint32_t val, int n) = 0;
inline void AlignBits()
{
if (outcnt!=8)
PutBits(0,outcnt);
}
inline bool Aligned() const { return outcnt == 8; }
inline int ByteCount() const { return unflushed; }
protected:
int unflushed;
int outcnt; // Bits unwritten in current output byte
uint32_t pendingbits;
};
/******************************
*
* Elementry stream buffer used to accumulate (byte-aligned) fragments ofencoded video. Currently
* each frame has its own buffer.
*
*****************************/
class ElemStrmFragBuf : public OutputFragBuf
{
public:
ElemStrmFragBuf( ElemStrmWriter &outstrm);
~ElemStrmFragBuf();
/**************
*
* Flush out buffer
* N.b. attempts to flush in non byte-aligned states are illegal
* and will abort
*
*************/
virtual void FlushBuffer();
/**************
*
* Reset buffer - empty buffer discarding current contents.
*
* ***********/
virtual void ResetBuffer();
/**************
*
* Write rightmost (least significant) n (0<=n<=32) bits of val to current buffer
*
*************/
virtual void PutBits( uint32_t val, int n);
private:
void AdjustBuffer();
protected:
ElemStrmWriter &writer;
uint8_t *buffer; // Output buffer - used to hold byte
// aligned output before flushing or
// backing up and re-encoding
int buffer_size;
};
/******************************
*
* Elementry stream buffer used to accumulate (byte-aligned) fragments ofencoded video. Currently
* each frame has its own buffer.
*
*****************************/
class CountOnlyFragBuf : public OutputFragBuf
{
public:
CountOnlyFragBuf();
~CountOnlyFragBuf();
/**************
*
* Flush out buffer
* N.b. attempts to flush in non byte-aligned states are illegal
* and will abort
*
*************/
virtual void FlushBuffer();
/**************
*
* Reset buffer - empty buffer discarding current contents.
*
* ***********/
virtual void ResetBuffer();
/**************
*
* Write rightmost (least significant) n (0<=n<=32) bits of val to current buffer
*
*************/
virtual void PutBits( uint32_t val, int n);
};
/*
* Local variables:
* c-file-style: "stroustrup"
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
#endif
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