resize.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: resize.cpp,v 1.9.32.1 2004/07/09 01:55:14 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
 * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
 * ENJOYMENT OR NON-INFRINGEMENT.
 * 
 * Technology Compatibility Kit Test Suite(s) Location:
 *    http://www.helixcommunity.org/content/tck
 * 
 * Contributor(s):
 * 
 * ***** END LICENSE BLOCK ***** */

////////////////////////////////////////////////////////
//	include files
////////////////////////////////////////////////////////

#include "hlxclib/stdlib.h"
#include "hlxclib/string.h"
#include "mmx_util.h"
#include "resize.h"


////////////////////////////////////////////////////////
//	internal prototypes
////////////////////////////////////////////////////////

static void
interpolate_ii (
    unsigned char *dest, int dest_width, int dest_height, int dest_pitch,
    unsigned char *src,  int src_width,  int src_height,  int src_pitch);

static void
decimate (
    unsigned char *dest, int dest_width, int dest_height, int dest_pitch,
    unsigned char *src,  int src_width,  int src_height,  int src_pitch, 
	RESIZE_BUFF_TYPE *buff);

#ifdef _M_IX86

static void
decimate_half_horiz_MMX (
    unsigned char *dest, int dest_width, int dest_height,
    unsigned char *src,  int src_width,  int src_height);

#endif

static void 
decimate_half_horiz_accurate(
    unsigned char *dest, int dest_width, int dest_height, int dest_pitch,
    unsigned char *src,  int src_width,  int src_height, int src_pitch);


////////////////////////////////////////////////////////
// Select interpolation or decimation
////////////////////////////////////////////////////////

void resize_plane(
    unsigned char *dest, int dest_width, int dest_height, int dest_pitch,
    unsigned char *src,  int src_width,  int src_height,  int src_pitch,
	RESIZE_BUFF_TYPE *buff, int accuracy)
{

	if ((dest_width > src_width) || (dest_height > src_height) || 
		(accuracy == 0) || (buff == NULL))
	{
		// interpolation
		interpolate_ii (dest,dest_width, dest_height, dest_pitch,
						src, src_width, src_height, src_pitch);
	}
	else
	{
		// decimation -- check for special case functions
#ifdef _M_IX86
		if (((dest_width) == (src_width >> 1)) &&
			((dest_height) == (src_height)) &&
			((dest_pitch) == (dest_width)) &&
			((src_pitch) == (src_width)) &&
            (checkMmxAvailablity()&CPU_HAS_MMX) && (accuracy == 0))
		{
			decimate_half_horiz_MMX (
				dest,dest_width, dest_height,
				src, src_width, src_height);
		}
		else
#endif
		if (((dest_width) == (src_width >> 1)) &&
			((dest_height) == (src_height)))
		{
			decimate_half_horiz_accurate(
				dest,dest_width, dest_height, dest_pitch,
				src, src_width, src_height, src_pitch);
		}
		else
		{
			decimate (dest,dest_width, dest_height, dest_pitch,
						src, src_width, src_height, src_pitch, buff);
		}
	}

}

#if 1 // simpler filter

#define FULL_PEL_INC 256
#define INT_FILT_SIZE 1025
#define INT_FILT_CENTER 512

static const int int_filt_tab[INT_FILT_SIZE] = 
{
	0,
	-3,	-5,	-8,	-11,	-13,	-16,	-19,	-21,	-24,	-27,	-29,	-32,	-35,	-37,	-40,	-43,	-45,	-48,	-50,	-53,
	-56,	-58,	-61,	-63,	-66,	-69,	-71,	-74,	-76,	-79,	-81,	-84,	-87,	-89,	-92,	-94,	-97,	-99,	-102,	-104,
	-107,	-109,	-111,	-114,	-116,	-119,	-121,	-124,	-126,	-128,	-131,	-133,	-135,	-138,	-140,	-142,	-144,	-147,	-149,	-151,
	-153,	-156,	-158,	-160,	-162,	-164,	-166,	-169,	-171,	-173,	-175,	-177,	-179,	-181,	-183,	-185,	-187,	-189,	-191,	-193,
	-194,	-196,	-198,	-200,	-202,	-203,	-205,	-207,	-209,	-210,	-212,	-214,	-215,	-217,	-218,	-220,	-222,	-223,	-225,	-226,
	-227,	-229,	-230,	-232,	-233,	-234,	-235,	-237,	-238,	-239,	-240,	-242,	-243,	-244,	-245,	-246,	-247,	-248,	-249,	-250,
	-251,	-251,	-252,	-253,	-254,	-255,	-255,	-256,	-257,	-257,	-258,	-258,	-259,	-259,	-260,	-260,	-261,	-261,	-261,	-262,
	-262,	-262,	-262,	-263,	-263,	-263,	-263,	-263,	-263,	-263,	-263,	-262,	-262,	-262,	-262,	-262,	-261,	-261,	-260,	-260,
	-260,	-259,	-258,	-258,	-257,	-257,	-256,	-255,	-254,	-253,	-253,	-252,	-251,	-250,	-249,	-248,	-246,	-245,	-244,	-243,
	-241,	-240,	-239,	-237,	-236,	-234,	-233,	-231,	-229,	-228,	-226,	-224,	-222,	-220,	-218,	-216,	-214,	-212,	-210,	-208,
	-206,	-203,	-201,	-199,	-196,	-194,	-191,	-189,	-186,	-183,	-180,	-178,	-175,	-172,	-169,	-166,	-163,	-160,	-157,	-153,
	-150,	-147,	-143,	-140,	-137,	-133,	-129,	-126,	-122,	-118,	-114,	-111,	-107,	-103,	-99,	-94,	-90,	-86,	-82,	-78,
	-73,	-69,	-64,	-60,	-55,	-50,	-45,	-41,	-36,	-31,	-26,	-21,	-16,	-11,	-5,	0,	16,	32,	48,	64,
	81,	97,	113,	130,	146,	163,	180,	196,	213,	230,	247,	264,	280,	297,	314,	332,	349,	366,	383,	400,
	418,	435,	452,	470,	487,	505,	522,	540,	558,	575,	593,	611,	629,	646,	664,	682,	700,	718,	736,	754,
	772,	790,	808,	827,	845,	863,	881,	899,	918,	936,	954,	973,	991,	1009,	1028,	1046,	1065,	1083,	1102,	1120,
	1139,	1157,	1176,	1194,	1213,	1231,	1250,	1268,	1287,	1306,	1324,	1343,	1362,	1380,	1399,	1418,	1436,	1455,	1473,	1492,
	1511,	1529,	1548,	1567,	1585,	1604,	1623,	1641,	1660,	1679,	1697,	1716,	1735,	1753,	1772,	1790,	1809,	1828,	1846,	1865,
	1883,	1902,	1920,	1939,	1957,	1976,	1994,	2013,	2031,	2049,	2068,	2086,	2104,	2123,	2141,	2159,	2177,	2195,	2214,	2232,
	2250,	2268,	2286,	2304,	2322,	2340,	2358,	2376,	2394,	2411,	2429,	2447,	2465,	2482,	2500,	2518,	2535,	2553,	2570,	2588,
	2605,	2622,	2640,	2657,	2674,	2691,	2708,	2725,	2742,	2759,	2776,	2793,	2810,	2827,	2843,	2860,	2877,	2893,	2910,	2926,
	2942,	2959,	2975,	2991,	3007,	3023,	3039,	3055,	3071,	3087,	3103,	3119,	3134,	3150,	3165,	3181,	3196,	3211,	3226,	3242,
	3257,	3272,	3287,	3301,	3316,	3331,	3345,	3360,	3374,	3389,	3403,	3417,	3432,	3446,	3460,	3473,	3487,	3501,	3515,	3528,
	3542,	3555,	3568,	3582,	3595,	3608,	3621,	3633,	3646,	3659,	3671,	3684,	3696,	3708,	3721,	3733,	3745,	3757,	3768,	3780,
	3792,	3803,	3814,	3826,	3837,	3848,	3859,	3870,	3880,	3891,	3902,	3912,	3922,	3932,	3943,	3953,	3962,	3972,	3982,	3991,
	4001,	4010,	4019,	4028,	4037,	4046,	4054,	4063,	4071,	4080,	4088,	4096,	4088,	4080,	4071,	4063,	4054,	4046,	4037,	4028,
	4019,	4010,	4001,	3991,	3982,	3972,	3962,	3953,	3943,	3932,	3922,	3912,	3902,	3891,	3880,	3870,	3859,	3848,	3837,	3826,
	3814,	3803,	3792,	3780,	3768,	3757,	3745,	3733,	3721,	3708,	3696,	3684,	3671,	3659,	3646,	3633,	3621,	3608,	3595,	3582,
	3568,	3555,	3542,	3528,	3515,	3501,	3487,	3473,	3460,	3446,	3432,	3417,	3403,	3389,	3374,	3360,	3345,	3331,	3316,	3301,
	3287,	3272,	3257,	3242,	3226,	3211,	3196,	3181,	3165,	3150,	3134,	3119,	3103,	3087,	3071,	3055,	3039,	3023,	3007,	2991,
	2975,	2959,	2942,	2926,	2910,	2893,	2877,	2860,	2843,	2827,	2810,	2793,	2776,	2759,	2742,	2725,	2708,	2691,	2674,	2657,
	2640,	2622,	2605,	2588,	2570,	2553,	2535,	2518,	2500,	2482,	2465,	2447,	2429,	2411,	2394,	2376,	2358,	2340,	2322,	2304,
	2286,	2268,	2250,	2232,	2214,	2195,	2177,	2159,	2141,	2123,	2104,	2086,	2068,	2049,	2031,	2013,	1994,	1976,	1957,	1939,
	1920,	1902,	1883,	1865,	1846,	1828,	1809,	1790,	1772,	1753,	1735,	1716,	1697,	1679,	1660,	1641,	1623,	1604,	1585,	1567,
	1548,	1529,	1511,	1492,	1473,	1455,	1436,	1418,	1399,	1380,	1362,	1343,	1324,	1306,	1287,	1268,	1250,	1231,	1213,	1194,
	1176,	1157,	1139,	1120,	1102,	1083,	1065,	1046,	1028,	1009,	991,	973,	954,	936,	918,	899,	881,	863,	845,	827,
	808,	790,	772,	754,	736,	718,	700,	682,	664,	646,	629,	611,	593,	575,	558,	540,	522,	505,	487,	470,
	452,	435,	418,	400,	383,	366,	349,	332,	314,	297,	280,	264,	247,	230,	213,	196,	180,	163,	146,	130,
	113,	97,	81,	64,	48,	32,	16,	0,	-5,	-11,	-16,	-21,	-26,	-31,	-36,	-41,	-45,	-50,	-55,	-60,
	-64,	-69,	-73,	-78,	-82,	-86,	-90,	-94,	-99,	-103,	-107,	-111,	-114,	-118,	-122,	-126,	-129,	-133,	-137,	-140,
	-143,	-147,	-150,	-153,	-157,	-160,	-163,	-166,	-169,	-172,	-175,	-178,	-180,	-183,	-186,	-189,	-191,	-194,	-196,	-199,
	-201,	-203,	-206,	-208,	-210,	-212,	-214,	-216,	-218,	-220,	-222,	-224,	-226,	-228,	-229,	-231,	-233,	-234,	-236,	-237,
	-239,	-240,	-241,	-243,	-244,	-245,	-246,	-248,	-249,	-250,	-251,	-252,	-253,	-253,	-254,	-255,	-256,	-257,	-257,	-258,
	-258,	-259,	-260,	-260,	-260,	-261,	-261,	-262,	-262,	-262,	-262,	-262,	-263,	-263,	-263,	-263,	-263,	-263,	-263,	-263,
	-262,	-262,	-262,	-262,	-261,	-261,	-261,	-260,	-260,	-259,	-259,	-258,	-258,	-257,	-257,	-256,	-255,	-255,	-254,	-253,
	-252,	-251,	-251,	-250,	-249,	-248,	-247,	-246,	-245,	-244,	-243,	-242,	-240,	-239,	-238,	-237,	-235,	-234,	-233,	-232,
	-230,	-229,	-227,	-226,	-225,	-223,	-222,	-220,	-218,	-217,	-215,	-214,	-212,	-210,	-209,	-207,	-205,	-203,	-202,	-200,
	-198,	-196,	-194,	-193,	-191,	-189,	-187,	-185,	-183,	-181,	-179,	-177,	-175,	-173,	-171,	-169,	-166,	-164,	-162,	-160,
	-158,	-156,	-153,	-151,	-149,	-147,	-144,	-142,	-140,	-138,	-135,	-133,	-131,	-128,	-126,	-124,	-121,	-119,	-116,	-114,
	-111,	-109,	-107,	-104,	-102,	-99,	-97,	-94,	-92,	-89,	-87,	-84,	-81,	-79,	-76,	-74,	-71,	-69,	-66,	-63,
	-61,	-58,	-56,	-53,	-50,	-48,	-45,	-43,	-40,	-37,	-35,	-32,	-29,	-27,	-24,	-21,	-19,	-16,	-13,	-11,
	-8,	-5,	-3,	0
};

#else  // complex filter

#define FULL_PEL_INC 128
#define INT_FILT_SIZE 1025
#define INT_FILT_CENTER 512

static const int int_filt_tab[INT_FILT_SIZE] = 
{
	0,
	0,	0,	-1,	-1,	-1,	-1,	-2,	-2,	-2,	-2,	-2,	-3,	-3,	-3,	-3,	-4,	-4,	-4,	-4,	-4,
	-5,	-5,	-5,	-5,	-5,	-6,	-6,	-6,	-6,	-6,	-7,	-7,	-7,	-7,	-7,	-7,	-8,	-8,	-8,	-8,
	-8,	-8,	-8,	-8,	-9,	-9,	-9,	-9,	-9,	-9,	-9,	-9,	-9,	-10,	-10,	-10,	-10,	-10,	-10,	-10,
	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,
	-10,	-9,	-9,	-9,	-9,	-9,	-9,	-9,	-9,	-9,	-8,	-8,	-8,	-8,	-8,	-8,	-8,	-7,	-7,	-7,
	-7,	-7,	-6,	-6,	-6,	-6,	-6,	-5,	-5,	-5,	-5,	-4,	-4,	-4,	-4,	-3,	-3,	-3,	-3,	-2,
	-2,	-2,	-1,	-1,	-1,	-1,	0,	0,	2,	4,	6,	9,	11,	13,	15,	17,	19,	21,	23,	25,
	28,	30,	32,	34,	36,	38,	40,	42,	44,	46,	48,	50,	51,	53,	55,	57,	59,	61,	62,	64,
	66,	67,	69,	70,	72,	74,	75,	76,	78,	79,	81,	82,	83,	84,	85,	87,	88,	89,	90,	91,
	91,	92,	93,	94,	95,	95,	96,	96,	97,	97,	98,	98,	98,	99,	99,	99,	99,	99,	99,	99,
	99,	98,	98,	98,	97,	97,	96,	96,	95,	94,	94,	93,	92,	91,	90,	89,	88,	87,	85,	84,
	83,	81,	80,	78,	77,	75,	73,	71,	70,	68,	66,	64,	62,	60,	57,	55,	53,	51,	48,	46,
	43,	41,	38,	35,	33,	30,	27,	24,	21,	18,	16,	12,	9,	6,	3,	0,	-10,	-19,	-29,	-39,
	-48,	-58,	-68,	-78,	-87,	-97,	-107,	-117,	-126,	-136,	-146,	-155,	-165,	-175,	-184,	-194,	-203,	-212,	-222,	-231,
	-240,	-249,	-258,	-267,	-276,	-285,	-293,	-302,	-310,	-318,	-326,	-335,	-342,	-350,	-358,	-365,	-373,	-380,	-387,	-394,
	-400,	-407,	-413,	-420,	-425,	-431,	-437,	-442,	-447,	-452,	-457,	-462,	-466,	-470,	-474,	-478,	-481,	-484,	-487,	-490,
	-492,	-495,	-496,	-498,	-500,	-501,	-501,	-502,	-502,	-502,	-502,	-501,	-500,	-499,	-498,	-496,	-494,	-491,	-488,	-485,
	-482,	-478,	-474,	-470,	-465,	-460,	-455,	-449,	-443,	-436,	-429,	-422,	-415,	-407,	-399,	-390,	-381,	-372,	-362,	-352,
	-342,	-331,	-320,	-309,	-297,	-285,	-272,	-259,	-246,	-232,	-218,	-203,	-188,	-173,	-158,	-142,	-125,	-108,	-91,	-74,
	-56,	-38,	-19,	0,	32,	65,	98,	131,	165,	198,	233,	267,	302,	338,	373,	409,	445,	481,	518,	555,
	592,	629,	667,	705,	743,	781,	820,	858,	897,	936,	975,	1015,	1054,	1094,	1133,	1173,	1213,	1253,	1293,	1333,
	1374,	1414,	1454,	1495,	1535,	1575,	1616,	1656,	1697,	1737,	1778,	1818,	1858,	1898,	1939,	1979,	2019,	2059,	2098,	2138,
	2178,	2217,	2256,	2295,	2334,	2373,	2412,	2450,	2488,	2526,	2564,	2601,	2639,	2676,	2712,	2749,	2785,	2821,	2857,	2892,
	2927,	2961,	2996,	3030,	3063,	3097,	3129,	3162,	3194,	3226,	3257,	3288,	3318,	3348,	3378,	3407,	3436,	3464,	3492,	3519,
	3546,	3572,	3598,	3623,	3648,	3672,	3696,	3719,	3742,	3764,	3785,	3806,	3826,	3846,	3865,	3884,	3902,	3919,	3936,	3952,
	3968,	3983,	3997,	4011,	4024,	4036,	4048,	4059,	4069,	4079,	4088,	4096,	4088,	4079,	4069,	4059,	4048,	4036,	4024,	4011,
	3997,	3983,	3968,	3952,	3936,	3919,	3902,	3884,	3865,	3846,	3826,	3806,	3785,	3764,	3742,	3719,	3696,	3672,	3648,	3623,
	3598,	3572,	3546,	3519,	3492,	3464,	3436,	3407,	3378,	3348,	3318,	3288,	3257,	3226,	3194,	3162,	3129,	3097,	3063,	3030,
	2996,	2961,	2927,	2892,	2857,	2821,	2785,	2749,	2712,	2676,	2639,	2601,	2564,	2526,	2488,	2450,	2412,	2373,	2334,	2295,
	2256,	2217,	2178,	2138,	2098,	2059,	2019,	1979,	1939,	1898,	1858,	1818,	1778,	1737,	1697,	1656,	1616,	1575,	1535,	1495,
	1454,	1414,	1374,	1333,	1293,	1253,	1213,	1173,	1133,	1094,	1054,	1015,	975,	936,	897,	858,	820,	781,	743,	705,
	667,	629,	592,	555,	518,	481,	445,	409,	373,	338,	302,	267,	233,	198,	165,	131,	98,	65,	32,	0,
	-19,	-38,	-56,	-74,	-91,	-108,	-125,	-142,	-158,	-173,	-188,	-203,	-218,	-232,	-246,	-259,	-272,	-285,	-297,	-309,
	-320,	-331,	-342,	-352,	-362,	-372,	-381,	-390,	-399,	-407,	-415,	-422,	-429,	-436,	-443,	-449,	-455,	-460,	-465,	-470,
	-474,	-478,	-482,	-485,	-488,	-491,	-494,	-496,	-498,	-499,	-500,	-501,	-502,	-502,	-502,	-502,	-501,	-501,	-500,	-498,
	-496,	-495,	-492,	-490,	-487,	-484,	-481,	-478,	-474,	-470,	-466,	-462,	-457,	-452,	-447,	-442,	-437,	-431,	-425,	-420,
	-413,	-407,	-400,	-394,	-387,	-380,	-373,	-365,	-358,	-350,	-342,	-335,	-326,	-318,	-310,	-302,	-293,	-285,	-276,	-267,
	-258,	-249,	-240,	-231,	-222,	-212,	-203,	-194,	-184,	-175,	-165,	-155,	-146,	-136,	-126,	-117,	-107,	-97,	-87,	-78,
	-68,	-58,	-48,	-39,	-29,	-19,	-10,	0,	3,	6,	9,	12,	16,	18,	21,	24,	27,	30,	33,	35,
	38,	41,	43,	46,	48,	51,	53,	55,	57,	60,	62,	64,	66,	68,	70,	71,	73,	75,	77,	78,
	80,	81,	83,	84,	85,	87,	88,	89,	90,	91,	92,	93,	94,	94,	95,	96,	96,	97,	97,	98,
	98,	98,	99,	99,	99,	99,	99,	99,	99,	99,	98,	98,	98,	97,	97,	96,	96,	95,	95,	94,
	93,	92,	91,	91,	90,	89,	88,	87,	85,	84,	83,	82,	81,	79,	78,	76,	75,	74,	72,	70,
	69,	67,	66,	64,	62,	61,	59,	57,	55,	53,	51,	50,	48,	46,	44,	42,	40,	38,	36,	34,
	32,	30,	28,	25,	23,	21,	19,	17,	15,	13,	11,	9,	6,	4,	2,	0,	0,	-1,	-1,	-1,
	-1,	-2,	-2,	-2,	-3,	-3,	-3,	-3,	-4,	-4,	-4,	-4,	-5,	-5,	-5,	-5,	-6,	-6,	-6,	-6,
	-6,	-7,	-7,	-7,	-7,	-7,	-8,	-8,	-8,	-8,	-8,	-8,	-8,	-9,	-9,	-9,	-9,	-9,	-9,	-9,
	-9,	-9,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,
	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-10,	-9,	-9,	-9,	-9,	-9,	-9,	-9,	-9,	-9,	-8,
	-8,	-8,	-8,	-8,	-8,	-8,	-8,	-7,	-7,	-7,	-7,	-7,	-7,	-6,	-6,	-6,	-6,	-6,	-5,	-5,
	-5,	-5,	-5,	-4,	-4,	-4,	-4,	-4,	-3,	-3,	-3,	-3,	-2,	-2,	-2,	-2,	-2,	-1,	-1,	-1,
	-1,	0,	0, 0
};

#endif



// Clipping table
#define CLAMP_BIAS  128 // Bias in clamping table 
#define CLIP_RANGE	(CLAMP_BIAS + 256 + CLAMP_BIAS)

const unsigned char ClampTbl[CLIP_RANGE] = { /* Flawfinder: ignore */
             0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 
            ,0x00 ,0x01 ,0x02 ,0x03 ,0x04 ,0x05 ,0x06 ,0x07 
            ,0x08 ,0x09 ,0x0a ,0x0b ,0x0c ,0x0d ,0x0e ,0x0f 
            ,0x10 ,0x11 ,0x12 ,0x13 ,0x14 ,0x15 ,0x16 ,0x17 
            ,0x18 ,0x19 ,0x1a ,0x1b ,0x1c ,0x1d ,0x1e ,0x1f 
            ,0x20 ,0x21 ,0x22 ,0x23 ,0x24 ,0x25 ,0x26 ,0x27 
            ,0x28 ,0x29 ,0x2a ,0x2b ,0x2c ,0x2d ,0x2e ,0x2f 
            ,0x30 ,0x31 ,0x32 ,0x33 ,0x34 ,0x35 ,0x36 ,0x37 
            ,0x38 ,0x39 ,0x3a ,0x3b ,0x3c ,0x3d ,0x3e ,0x3f 
            ,0x40 ,0x41 ,0x42 ,0x43 ,0x44 ,0x45 ,0x46 ,0x47 
            ,0x48 ,0x49 ,0x4a ,0x4b ,0x4c ,0x4d ,0x4e ,0x4f 
            ,0x50 ,0x51 ,0x52 ,0x53 ,0x54 ,0x55 ,0x56 ,0x57 
            ,0x58 ,0x59 ,0x5a ,0x5b ,0x5c ,0x5d ,0x5e ,0x5f 
            ,0x60 ,0x61 ,0x62 ,0x63 ,0x64 ,0x65 ,0x66 ,0x67 
            ,0x68 ,0x69 ,0x6a ,0x6b ,0x6c ,0x6d ,0x6e ,0x6f 
            ,0x70 ,0x71 ,0x72 ,0x73 ,0x74 ,0x75 ,0x76 ,0x77 
            ,0x78 ,0x79 ,0x7a ,0x7b ,0x7c ,0x7d ,0x7e ,0x7f 
            ,0x80 ,0x81 ,0x82 ,0x83 ,0x84 ,0x85 ,0x86 ,0x87 
            ,0x88 ,0x89 ,0x8a ,0x8b ,0x8c ,0x8d ,0x8e ,0x8f 
            ,0x90 ,0x91 ,0x92 ,0x93 ,0x94 ,0x95 ,0x96 ,0x97 
            ,0x98 ,0x99 ,0x9a ,0x9b ,0x9c ,0x9d ,0x9e ,0x9f 
            ,0xa0 ,0xa1 ,0xa2 ,0xa3 ,0xa4 ,0xa5 ,0xa6 ,0xa7 
            ,0xa8 ,0xa9 ,0xaa ,0xab ,0xac ,0xad ,0xae ,0xaf 
            ,0xb0 ,0xb1 ,0xb2 ,0xb3 ,0xb4 ,0xb5 ,0xb6 ,0xb7 
            ,0xb8 ,0xb9 ,0xba ,0xbb ,0xbc ,0xbd ,0xbe ,0xbf 
            ,0xc0 ,0xc1 ,0xc2 ,0xc3 ,0xc4 ,0xc5 ,0xc6 ,0xc7 
            ,0xc8 ,0xc9 ,0xca ,0xcb ,0xcc ,0xcd ,0xce ,0xcf 
            ,0xd0 ,0xd1 ,0xd2 ,0xd3 ,0xd4 ,0xd5 ,0xd6 ,0xd7 
            ,0xd8 ,0xd9 ,0xda ,0xdb ,0xdc ,0xdd ,0xde ,0xdf 
            ,0xe0 ,0xe1 ,0xe2 ,0xe3 ,0xe4 ,0xe5 ,0xe6 ,0xe7 
            ,0xe8 ,0xe9 ,0xea ,0xeb ,0xec ,0xed ,0xee ,0xef 
            ,0xf0 ,0xf1 ,0xf2 ,0xf3 ,0xf4 ,0xf5 ,0xf6 ,0xf7 
            ,0xf8 ,0xf9 ,0xfa ,0xfb ,0xfc ,0xfd ,0xfe ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
            ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff ,0xff 
   };

#ifdef CLIP_PEL
#undef CLIP_PEL
#endif

#define CLIP_PEL(p) (ClampTbl[ (p) + CLAMP_BIAS ])


#define POS_SCALE_BITS		16
#define FILT_COEFF_BITS		12
#define FILT_SCALE_BITS		8

#define USE_SOURCE_LEVEL	1


////////////////////////////////////////////////////////
//
//	Performs fast half horizontal w/ MMX
//		Greg Conklin - 9/21/99
//
////////////////////////////////////////////////////////

#ifdef _M_IX86

static void
decimate_half_horiz_MMX (
    unsigned char *dest, int dest_width, int dest_height,
    unsigned char *src,  int src_width,  int src_height)
{
	unsigned char word_mask[8] = {0xFF,0x00,0xFF,0x00,0xFF,0x00,0xFF,0x00}; /* Flawfinder: ignore */
	int	num_itrs;

	// must be doing half horizontal resolution
	if (((dest_width) != (src_width >> 1)) ||
		((dest_height) != (src_height)))
		return;

	num_itrs = ((dest_height*dest_width) >> 3);

	__asm {

		mov			ecx, num_itrs
		mov			esi, src			// esi -> source frame
		mov			edi, dest			// edi -> destination frame
		movq		mm7, [word_mask]	// mm7 holds the bytes->words mask

ALIGN 16
pel_loop:
		movq		mm0, [esi]
		movq		mm1, mm0
		psrlw		mm1, 8	
		pand		mm0, mm7
		paddw		mm0, mm1