dct.h

sloedgy open sip stack source code

/*
 * Copyright (c) 1994 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the Network Research
 *	Group at Lawrence Berkeley Laboratory.
 * 4. Neither the name of the University nor of the Laboratory may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

/************ Change log
 *
 * $Log: dct.h,v $
 * Revision 1.1  2006/06/26 03:03:16  joegenbaclor
 * I have decided to include the latest development realease  of OPAL tagged Deimos Devel 1 (June 8 2006) as inegrated classes to opensipstack to avoid future version conflicts due to the fast pace in OPAL development.   This move is also aimed to reduce the size of projects using OPAL componets such as the soon to be relased OpenSIPPhone.
 *
 * Revision 2.1  2003/03/15 23:42:59  robertj
 * Update to OpenH323 v1.11.7
 *
 * Revision 1.5  2003/03/14 07:25:55  robertj
 * Removed $header keyword so is not different on alternate repositories
 *
 * Revision 1.4  2002/05/17 01:47:33  dereks
 * backout the integer maths in the h261 codec.
 *
 * Revision 1.3  2001/10/14 21:48:45  dereks
 * Change vic's fdct() from floating-point to fix-point. Improves performance
 * for h261 video significantly on some machines. Thanks to Cosmos Jiang
 *
 * Revision 1.2  2000/08/25 03:18:49  dereks
 * Add change log facility (Thanks Robert for the info on implementation)
 *
 *
 *
 ********/



/*
 * Ck = cos(k pi / 16)
 * Sk = sin(k pi / 16)
 */
#define C1 0.98078528
#define C2 0.92387953
#define C3 0.83146961
#define C4 0.70710678
#define C5 0.55557023
#define C6 0.38268343
#define C7 0.19509032
#define S1 C7
#define S3 C5
#define S6 C2
#define C_1 C1
#define S_1 (-S1)
#define C_3 C3
#define S_3 (-S3)

void fdct(const u_char* in, int stride, short* out, const float* qt);
void bv_rdct1(int dc, short* blk, int ac0, u_char* out, int stride);
void bv_rdct2(int dc, short* blk, int ac0,
	      u_char* in, u_char* out, int stride);
void bv_rdct3(int dc, short* blk, int ac0, int ac1,
	      u_char* in, u_char* out, int stride);

#ifdef INT_64
void rdct(short* coef, INT_64 mask, u_char* out, int stride, const int* qt);
void rdct(short* coef, INT_64 mask, u_char* out, int stride, const u_char* in);
#else
void rdct(short* coef, u_int m0, u_int m1, u_char* out, 
	  int stride, const int* qt);
void rdct(short* coef, u_int m0, u_int m1, u_char* out,
	  int stride, const u_char* in);
#endif

void dcfill(int dc, u_char* out, int stride);
void dcsum(int dc, u_char* in, u_char* out, int stride);
void dcsum2(int dc, u_char* in, u_char* out, int stride);
void dct_decimate(const short* in0, const short* in1, short* out);

/*XXX*/
void rdct_fold_q(const int* in, int* qt);
void fdct_fold_q(const int* in, float* qt);

extern const u_char ROWZAG[];
extern const u_char COLZAG[];

/*XXX*/
extern void j_fwd_dct (short* data);