Unified putbits.

Original commit message from CVS:
Unified putbits.
This commit is contained in:
Wim Taymans 2000-06-16 22:58:38 +00:00
parent d3fb1a8bd3
commit 3f0b3470a3
6 changed files with 204 additions and 2 deletions

View file

@ -326,6 +326,7 @@ libs/riff/Makefile
libs/colorspace/Makefile libs/colorspace/Makefile
libs/videoscale/Makefile libs/videoscale/Makefile
libs/getbits/Makefile libs/getbits/Makefile
libs/putbits/Makefile
plugins/Makefile plugins/Makefile
plugins/au/Makefile plugins/au/Makefile
plugins/wav/Makefile plugins/wav/Makefile

View file

@ -1,3 +1,3 @@
SUBDIRS = riff colorspace getbits videoscale SUBDIRS = riff colorspace getbits putbits videoscale
DIST_SUBDIRS = riff colorspace getbits videoscale DIST_SUBDIRS = riff colorspace getbits putbits videoscale

7
libs/putbits/.gitignore vendored Normal file
View file

@ -0,0 +1,7 @@
Makefile
Makefile.in
*.o
*.lo
*.la
.deps
.libs

15
libs/putbits/Makefile.am Normal file
View file

@ -0,0 +1,15 @@
filterdir = $(libdir)/gst
filter_LTLIBRARIES = libgstputbits.la
libgstputbits_la_SOURCES = gstputbits.c
libgstputbitsincludedir = $(includedir)/gst/libs/gstputbits.h
libgstputbitsinclude_HEADERS = gstputbits.h
noinst_HEADERS = gstputbits.h
CFLAGS += -Wall -O2 -fomit-frame-pointer -funroll-all-loops -finline-functions -ffast-math
INCLUDES = $(GLIB_CFLAGS) $(GTK_CFLAGS) -I$(top_srcdir) -I$(top_srcdir)/include
LDADD = $(GLIB_LIBS) $(GTK_LIBS) $(top_srcdir)/gst/libgst.la

101
libs/putbits/gstputbits.c Normal file
View file

@ -0,0 +1,101 @@
/* putbits.c, bit-level output */
/* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
/*
* Disclaimer of Warranty
*
* These software programs are available to the user without any license fee or
* royalty on an "as is" basis. The MPEG Software Simulation Group disclaims
* any and all warranties, whether express, implied, or statuary, including any
* implied warranties or merchantability or of fitness for a particular
* purpose. In no event shall the copyright-holder be liable for any
* incidental, punitive, or consequential damages of any kind whatsoever
* arising from the use of these programs.
*
* This disclaimer of warranty extends to the user of these programs and user's
* customers, employees, agents, transferees, successors, and assigns.
*
* The MPEG Software Simulation Group does not represent or warrant that the
* programs furnished hereunder are free of infringement of any third-party
* patents.
*
* Commercial implementations of MPEG-1 and MPEG-2 video, including shareware,
* are subject to royalty fees to patent holders. Many of these patents are
* general enough such that they are unavoidable regardless of implementation
* design.
*
*/
#include <stdlib.h>
#include <stdio.h>
#include "gstputbits.h"
/* initialize buffer, call once before first putbits or alignbits */
void gst_putbits_init(gst_putbits_t *pb)
{
pb->outcnt = 8;
pb->bytecnt = 0;
pb->outbase = 0;
}
void gst_putbits_new_empty_buffer(gst_putbits_t *pb, int len)
{
pb->outbfr = pb->outbase = malloc(len);
pb->temp = 0;
pb->len = len;
pb->newlen = 0;
pb->outcnt = 8;
}
void gst_putbits_new_buffer(gst_putbits_t *pb, unsigned char *buffer, int len)
{
pb->outbfr = buffer;
pb->temp = 0;
pb->outcnt = 8;
pb->bytecnt = 0;
pb->len = len;
}
/* write rightmost n (0<=n<=32) bits of val to outfile */
void gst_putbits(gst_putbits_t *pb, int val, int n)
{
int i;
unsigned int mask;
//printf("putbits: %d %d %ld\n", val, n, pb->outcnt);
mask = 1 << (n-1); /* selects first (leftmost) bit */
for (i=0; i<n; i++)
{
pb->temp <<= 1;
if (val & mask)
pb->temp|= 1;
mask >>= 1; /* select next bit */
pb->outcnt--;
if (pb->outcnt==0) /* 8 bit buffer full */
{
pb->len--;
pb->newlen++;
*(pb->outbfr++) = pb->temp;
pb->outcnt = 8;
pb->bytecnt++;
}
}
}
/* zero bit stuffing to next byte boundary (5.2.3, 6.2.1) */
void gst_putbits_align(gst_putbits_t *pb)
{
if (pb->outcnt!=8)
gst_putbits(pb, 0, pb->outcnt);
}
/* return total number of generated bits */
int gst_putbits_bitcount(gst_putbits_t *pb)
{
return 8*pb->bytecnt + (8-pb->outcnt);
}

78
libs/putbits/gstputbits.h Normal file
View file

@ -0,0 +1,78 @@
/* putbits.h, bit-level output */
/* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
/*
* Disclaimer of Warranty
*
* These software programs are available to the user without any license fee or
* royalty on an "as is" basis. The MPEG Software Simulation Group disclaims
* any and all warranties, whether express, implied, or statuary, including any
* implied warranties or merchantability or of fitness for a particular
* purpose. In no event shall the copyright-holder be liable for any
* incidental, punitive, or consequential damages of any kind whatsoever
* arising from the use of these programs.
*
* This disclaimer of warranty extends to the user of these programs and user's
* customers, employees, agents, transferees, successors, and assigns.
*
* The MPEG Software Simulation Group does not represent or warrant that the
* programs furnished hereunder are free of infringement of any third-party
* patents.
*
* Commercial implementations of MPEG-1 and MPEG-2 video, including shareware,
* are subject to royalty fees to patent holders. Many of these patents are
* general enough such that they are unavoidable regardless of implementation
* design.
*
*/
#ifndef __GST_PUTBITS_H__
#define __GST_PUTBITS_H__
typedef struct _gst_putbits_t gst_putbits_t;
struct _gst_putbits_t {
unsigned char *outbfr;
unsigned char *outbase;
unsigned char temp;
int outcnt;
int bytecnt;
int len;
int newlen;
};
void gst_putbits_init(gst_putbits_t *pb);
void gst_putbits_new_empty_buffer(gst_putbits_t *pb, int len);
void gst_putbits_new_buffer(gst_putbits_t *pb, unsigned char *buffer, int len);
void gst_putbits(gst_putbits_t *pb, int val, int n);
void gst_putbits_align(gst_putbits_t *pb);
int gst_putbits_bitcount(gst_putbits_t *pb);
#define gst_putbits1(gb, val) gst_putbits(gb, val, 1)
#define gst_putbits2(gb, val) gst_putbits(gb, val, 2)
#define gst_putbits3(gb, val) gst_putbits(gb, val, 3)
#define gst_putbits4(gb, val) gst_putbits(gb, val, 4)
#define gst_putbits5(gb, val) gst_putbits(gb, val, 5)
#define gst_putbits6(gb, val) gst_putbits(gb, val, 6)
#define gst_putbits7(gb, val) gst_putbits(gb, val, 7)
#define gst_putbits8(gb, val) gst_putbits(gb, val, 8)
#define gst_putbits9(gb, val) gst_putbits(gb, val, 9)
#define gst_putbits10(gb, val) gst_putbits(gb, val, 10)
#define gst_putbits11(gb, val) gst_putbits(gb, val, 11)
#define gst_putbits12(gb, val) gst_putbits(gb, val, 12)
#define gst_putbits13(gb, val) gst_putbits(gb, val, 13)
#define gst_putbits14(gb, val) gst_putbits(gb, val, 14)
#define gst_putbits15(gb, val) gst_putbits(gb, val, 15)
#define gst_putbits16(gb, val) gst_putbits(gb, val, 16)
#define gst_putbits17(gb, val) gst_putbits(gb, val, 17)
#define gst_putbits18(gb, val) gst_putbits(gb, val, 18)
#define gst_putbits19(gb, val) gst_putbits(gb, val, 19)
#define gst_putbits20(gb, val) gst_putbits(gb, val, 20)
#define gst_putbits21(gb, val) gst_putbits(gb, val, 21)
#define gst_putbits22(gb, val) gst_putbits(gb, val, 22)
#define gst_putbits32(gb, val) gst_putbits(gb, val, 32)
#define gst_putbitsn(gb, val, n) gst_putbits(gb, val, n)
#endif /* __GST_PUTBITS_H__ */