dct.h

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: dct.h,v 1.1.8.1 2004/07/09 01:50:08 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
 * 
 * The contents of this file, and the files included with this file,
 * are subject to the current version of the RealNetworks Public
 * Source License (the "RPSL") available at
 * http://www.helixcommunity.org/content/rpsl unless you have licensed
 * the file under the current version of the RealNetworks Community
 * Source License (the "RCSL") available at
 * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
 * will apply. You may also obtain the license terms directly from
 * RealNetworks.  You may not use this file except in compliance with
 * the RPSL or, if you have a valid RCSL with RealNetworks applicable
 * to this file, the RCSL.  Please see the applicable RPSL or RCSL for
 * the rights, obligations and limitations governing use of the
 * contents of the file.
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL") in which case the provisions of the GPL are applicable
 * instead of those above. If you wish to allow use of your version of
 * this file only under the terms of the GPL, and not to allow others
 * to use your version of this file under the terms of either the RPSL
 * or RCSL, indicate your decision by deleting the provisions above
 * and replace them with the notice and other provisions required by
 * the GPL. If you do not delete the provisions above, a recipient may
 * use your version of this file under the terms of any one of the
 * RPSL, the RCSL or the GPL.
 * 
 * This file is part of the Helix DNA Technology. RealNetworks is the
 * developer of the Original Code and owns the copyrights in the
 * portions it created.
 * 
 * This file, and the files included with this file, is distributed
 * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
 * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
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 * Contributor(s):
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 * ***** END LICENSE BLOCK ***** */

/*
 * 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.
 *
 */

#ifdef _MACINTOSH
#   include "config.h"
#endif 

/*
 * 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);