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/* putbits.c, bit-level output */
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/* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
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* Disclaimer of Warranty
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* These software programs are available to the user without any license fee or
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* royalty on an "as is" basis. The MPEG Software Simulation Group disclaims
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* any and all warranties, whether express, implied, or statuary, including any
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* implied warranties or merchantability or of fitness for a particular
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* purpose. In no event shall the copyright-holder be liable for any
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* incidental, punitive, or consequential damages of any kind whatsoever
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* arising from the use of these programs.
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* This disclaimer of warranty extends to the user of these programs and user's
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* customers, employees, agents, transferees, successors, and assigns.
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* The MPEG Software Simulation Group does not represent or warrant that the
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* programs furnished hereunder are free of infringement of any third-party
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* Commercial implementations of MPEG-1 and MPEG-2 video, including shareware,
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* are subject to royalty fees to patent holders. Many of these patents are
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* general enough such that they are unavoidable regardless of implementation
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#include "mpeg2enc_config.h"
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#include "mpeg2enc_global.h"
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static unsigned char outbfr;
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/* initialize buffer, call once before first putbits or alignbits */
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VTK_MPEG2ENC_EXPORT void MPEG2_initbits()
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/* write rightmost n (0<=n<=32) bits of val to outfile */
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void MPEG2_putbits(val,n,mpeg2_struct)
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struct MPEG2_structure *mpeg2_struct;
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mask = 1 << (n-1); /* selects first (leftmost) bit */
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mask >>= 1; /* select next bit */
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if (outcnt==0) /* 8 bit buffer full */
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putc(outbfr,mpeg2_struct->outfile);
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/* zero bit stuffing to next byte boundary (5.2.3, 6.2.1) */
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void MPEG2_alignbits(mpeg2_struct)
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struct MPEG2_structure *mpeg2_struct;
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MPEG2_putbits(0,outcnt,mpeg2_struct);
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/* return total number of generated bits */
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return 8*bytecnt + (8-outcnt);