WebSVN – Kolibri OS – Blame – /contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libswscale/utils.c

Rev	Author	Line No.	Line
6148	serge	1	/*
		2	* Copyright (C) 2001-2003 Michael Niedermayer
		3	*
		4	* This file is part of FFmpeg.
		5	*
		6	* FFmpeg is free software; you can redistribute it and/or
		7	* modify it under the terms of the GNU Lesser General Public
		8	* License as published by the Free Software Foundation; either
		9	* version 2.1 of the License, or (at your option) any later version.
		10	*
		11	* FFmpeg is distributed in the hope that it will be useful,
		12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		14	* Lesser General Public License for more details.
		15	*
		16	* You should have received a copy of the GNU Lesser General Public
		17	* License along with FFmpeg; if not, write to the Free Software
		18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
		19	*/
		20
		21	#include "config.h"
		22
		23	#define _SVID_SOURCE // needed for MAP_ANONYMOUS
		24	#define _DARWIN_C_SOURCE // needed for MAP_ANON
		25	#include
		26	#include
		27	#include
		28	#include
		29	#if HAVE_SYS_MMAN_H
		30	#include
		31	#if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
		32	#define MAP_ANONYMOUS MAP_ANON
		33	#endif
		34	#endif
		35	#if HAVE_VIRTUALALLOC
		36	#define WIN32_LEAN_AND_MEAN
		37	#include
		38	#endif
		39
		40	#include "libavutil/attributes.h"
		41	#include "libavutil/avassert.h"
		42	#include "libavutil/avutil.h"
		43	#include "libavutil/bswap.h"
		44	#include "libavutil/cpu.h"
		45	#include "libavutil/intreadwrite.h"
		46	#include "libavutil/mathematics.h"
		47	#include "libavutil/opt.h"
		48	#include "libavutil/pixdesc.h"
		49	#include "libavutil/ppc/cpu.h"
		50	#include "libavutil/x86/asm.h"
		51	#include "libavutil/x86/cpu.h"
		52	#include "rgb2rgb.h"
		53	#include "swscale.h"
		54	#include "swscale_internal.h"
		55
		56	static void handle_formats(SwsContext *c);
		57
		58	unsigned swscale_version(void)
		59	{
		60	av_assert0(LIBSWSCALE_VERSION_MICRO >= 100);
		61	return LIBSWSCALE_VERSION_INT;
		62	}
		63
		64	const char *swscale_configuration(void)
		65	{
		66	return FFMPEG_CONFIGURATION;
		67	}
		68
		69	const char *swscale_license(void)
		70	{
		71	#define LICENSE_PREFIX "libswscale license: "
		72	return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
		73	}
		74
		75	#define RET 0xC3 // near return opcode for x86
		76
		77	typedef struct FormatEntry {
		78	uint8_t is_supported_in :1;
		79	uint8_t is_supported_out :1;
		80	uint8_t is_supported_endianness :1;
		81	} FormatEntry;
		82
		83	static const FormatEntry format_entries[AV_PIX_FMT_NB] = {
		84	[AV_PIX_FMT_YUV420P] = { 1, 1 },
		85	[AV_PIX_FMT_YUYV422] = { 1, 1 },
		86	[AV_PIX_FMT_RGB24] = { 1, 1 },
		87	[AV_PIX_FMT_BGR24] = { 1, 1 },
		88	[AV_PIX_FMT_YUV422P] = { 1, 1 },
		89	[AV_PIX_FMT_YUV444P] = { 1, 1 },
		90	[AV_PIX_FMT_YUV410P] = { 1, 1 },
		91	[AV_PIX_FMT_YUV411P] = { 1, 1 },
		92	[AV_PIX_FMT_GRAY8] = { 1, 1 },
		93	[AV_PIX_FMT_MONOWHITE] = { 1, 1 },
		94	[AV_PIX_FMT_MONOBLACK] = { 1, 1 },
		95	[AV_PIX_FMT_PAL8] = { 1, 0 },
		96	[AV_PIX_FMT_YUVJ420P] = { 1, 1 },
		97	[AV_PIX_FMT_YUVJ411P] = { 1, 1 },
		98	[AV_PIX_FMT_YUVJ422P] = { 1, 1 },
		99	[AV_PIX_FMT_YUVJ444P] = { 1, 1 },
		100	[AV_PIX_FMT_UYVY422] = { 1, 1 },
		101	[AV_PIX_FMT_UYYVYY411] = { 0, 0 },
		102	[AV_PIX_FMT_BGR8] = { 1, 1 },
		103	[AV_PIX_FMT_BGR4] = { 0, 1 },
		104	[AV_PIX_FMT_BGR4_BYTE] = { 1, 1 },
		105	[AV_PIX_FMT_RGB8] = { 1, 1 },
		106	[AV_PIX_FMT_RGB4] = { 0, 1 },
		107	[AV_PIX_FMT_RGB4_BYTE] = { 1, 1 },
		108	[AV_PIX_FMT_NV12] = { 1, 1 },
		109	[AV_PIX_FMT_NV21] = { 1, 1 },
		110	[AV_PIX_FMT_ARGB] = { 1, 1 },
		111	[AV_PIX_FMT_RGBA] = { 1, 1 },
		112	[AV_PIX_FMT_ABGR] = { 1, 1 },
		113	[AV_PIX_FMT_BGRA] = { 1, 1 },
		114	[AV_PIX_FMT_0RGB] = { 1, 1 },
		115	[AV_PIX_FMT_RGB0] = { 1, 1 },
		116	[AV_PIX_FMT_0BGR] = { 1, 1 },
		117	[AV_PIX_FMT_BGR0] = { 1, 1 },
		118	[AV_PIX_FMT_GRAY16BE] = { 1, 1 },
		119	[AV_PIX_FMT_GRAY16LE] = { 1, 1 },
		120	[AV_PIX_FMT_YUV440P] = { 1, 1 },
		121	[AV_PIX_FMT_YUVJ440P] = { 1, 1 },
		122	[AV_PIX_FMT_YUVA420P] = { 1, 1 },
		123	[AV_PIX_FMT_YUVA422P] = { 1, 1 },
		124	[AV_PIX_FMT_YUVA444P] = { 1, 1 },
		125	[AV_PIX_FMT_YUVA420P9BE] = { 1, 1 },
		126	[AV_PIX_FMT_YUVA420P9LE] = { 1, 1 },
		127	[AV_PIX_FMT_YUVA422P9BE] = { 1, 1 },
		128	[AV_PIX_FMT_YUVA422P9LE] = { 1, 1 },
		129	[AV_PIX_FMT_YUVA444P9BE] = { 1, 1 },
		130	[AV_PIX_FMT_YUVA444P9LE] = { 1, 1 },
		131	[AV_PIX_FMT_YUVA420P10BE]= { 1, 1 },
		132	[AV_PIX_FMT_YUVA420P10LE]= { 1, 1 },
		133	[AV_PIX_FMT_YUVA422P10BE]= { 1, 1 },
		134	[AV_PIX_FMT_YUVA422P10LE]= { 1, 1 },
		135	[AV_PIX_FMT_YUVA444P10BE]= { 1, 1 },
		136	[AV_PIX_FMT_YUVA444P10LE]= { 1, 1 },
		137	[AV_PIX_FMT_YUVA420P16BE]= { 1, 1 },
		138	[AV_PIX_FMT_YUVA420P16LE]= { 1, 1 },
		139	[AV_PIX_FMT_YUVA422P16BE]= { 1, 1 },
		140	[AV_PIX_FMT_YUVA422P16LE]= { 1, 1 },
		141	[AV_PIX_FMT_YUVA444P16BE]= { 1, 1 },
		142	[AV_PIX_FMT_YUVA444P16LE]= { 1, 1 },
		143	[AV_PIX_FMT_RGB48BE] = { 1, 1 },
		144	[AV_PIX_FMT_RGB48LE] = { 1, 1 },
		145	[AV_PIX_FMT_RGBA64BE] = { 1, 1 },
		146	[AV_PIX_FMT_RGBA64LE] = { 1, 1 },
		147	[AV_PIX_FMT_RGB565BE] = { 1, 1 },
		148	[AV_PIX_FMT_RGB565LE] = { 1, 1 },
		149	[AV_PIX_FMT_RGB555BE] = { 1, 1 },
		150	[AV_PIX_FMT_RGB555LE] = { 1, 1 },
		151	[AV_PIX_FMT_BGR565BE] = { 1, 1 },
		152	[AV_PIX_FMT_BGR565LE] = { 1, 1 },
		153	[AV_PIX_FMT_BGR555BE] = { 1, 1 },
		154	[AV_PIX_FMT_BGR555LE] = { 1, 1 },
		155	[AV_PIX_FMT_YUV420P16LE] = { 1, 1 },
		156	[AV_PIX_FMT_YUV420P16BE] = { 1, 1 },
		157	[AV_PIX_FMT_YUV422P16LE] = { 1, 1 },
		158	[AV_PIX_FMT_YUV422P16BE] = { 1, 1 },
		159	[AV_PIX_FMT_YUV444P16LE] = { 1, 1 },
		160	[AV_PIX_FMT_YUV444P16BE] = { 1, 1 },
		161	[AV_PIX_FMT_RGB444LE] = { 1, 1 },
		162	[AV_PIX_FMT_RGB444BE] = { 1, 1 },
		163	[AV_PIX_FMT_BGR444LE] = { 1, 1 },
		164	[AV_PIX_FMT_BGR444BE] = { 1, 1 },
		165	[AV_PIX_FMT_Y400A] = { 1, 0 },
		166	[AV_PIX_FMT_BGR48BE] = { 1, 1 },
		167	[AV_PIX_FMT_BGR48LE] = { 1, 1 },
		168	[AV_PIX_FMT_BGRA64BE] = { 0, 0 },
		169	[AV_PIX_FMT_BGRA64LE] = { 0, 0 },
		170	[AV_PIX_FMT_YUV420P9BE] = { 1, 1 },
		171	[AV_PIX_FMT_YUV420P9LE] = { 1, 1 },
		172	[AV_PIX_FMT_YUV420P10BE] = { 1, 1 },
		173	[AV_PIX_FMT_YUV420P10LE] = { 1, 1 },
		174	[AV_PIX_FMT_YUV420P12BE] = { 1, 1 },
		175	[AV_PIX_FMT_YUV420P12LE] = { 1, 1 },
		176	[AV_PIX_FMT_YUV420P14BE] = { 1, 1 },
		177	[AV_PIX_FMT_YUV420P14LE] = { 1, 1 },
		178	[AV_PIX_FMT_YUV422P9BE] = { 1, 1 },
		179	[AV_PIX_FMT_YUV422P9LE] = { 1, 1 },
		180	[AV_PIX_FMT_YUV422P10BE] = { 1, 1 },
		181	[AV_PIX_FMT_YUV422P10LE] = { 1, 1 },
		182	[AV_PIX_FMT_YUV422P12BE] = { 1, 1 },
		183	[AV_PIX_FMT_YUV422P12LE] = { 1, 1 },
		184	[AV_PIX_FMT_YUV422P14BE] = { 1, 1 },
		185	[AV_PIX_FMT_YUV422P14LE] = { 1, 1 },
		186	[AV_PIX_FMT_YUV444P9BE] = { 1, 1 },
		187	[AV_PIX_FMT_YUV444P9LE] = { 1, 1 },
		188	[AV_PIX_FMT_YUV444P10BE] = { 1, 1 },
		189	[AV_PIX_FMT_YUV444P10LE] = { 1, 1 },
		190	[AV_PIX_FMT_YUV444P12BE] = { 1, 1 },
		191	[AV_PIX_FMT_YUV444P12LE] = { 1, 1 },
		192	[AV_PIX_FMT_YUV444P14BE] = { 1, 1 },
		193	[AV_PIX_FMT_YUV444P14LE] = { 1, 1 },
		194	[AV_PIX_FMT_GBRP] = { 1, 1 },
		195	[AV_PIX_FMT_GBRP9LE] = { 1, 1 },
		196	[AV_PIX_FMT_GBRP9BE] = { 1, 1 },
		197	[AV_PIX_FMT_GBRP10LE] = { 1, 1 },
		198	[AV_PIX_FMT_GBRP10BE] = { 1, 1 },
		199	[AV_PIX_FMT_GBRP12LE] = { 1, 1 },
		200	[AV_PIX_FMT_GBRP12BE] = { 1, 1 },
		201	[AV_PIX_FMT_GBRP14LE] = { 1, 1 },
		202	[AV_PIX_FMT_GBRP14BE] = { 1, 1 },
		203	[AV_PIX_FMT_GBRP16LE] = { 1, 0 },
		204	[AV_PIX_FMT_GBRP16BE] = { 1, 0 },
		205	[AV_PIX_FMT_XYZ12BE] = { 1, 1, 1 },
		206	[AV_PIX_FMT_XYZ12LE] = { 1, 1, 1 },
		207	[AV_PIX_FMT_GBRAP] = { 1, 1 },
		208	[AV_PIX_FMT_GBRAP16LE] = { 1, 0 },
		209	[AV_PIX_FMT_GBRAP16BE] = { 1, 0 },
		210	};
		211
		212	int sws_isSupportedInput(enum AVPixelFormat pix_fmt)
		213	{
		214	return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
		215	format_entries[pix_fmt].is_supported_in : 0;
		216	}
		217
		218	int sws_isSupportedOutput(enum AVPixelFormat pix_fmt)
		219	{
		220	return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
		221	format_entries[pix_fmt].is_supported_out : 0;
		222	}
		223
		224	int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt)
		225	{
		226	return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
		227	format_entries[pix_fmt].is_supported_endianness : 0;
		228	}
		229
		230	#if FF_API_SWS_FORMAT_NAME
		231	const char *sws_format_name(enum AVPixelFormat format)
		232	{
		233	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format);
		234	if (desc)
		235	return desc->name;
		236	else
		237	return "Unknown format";
		238	}
		239	#endif
		240
		241	static double getSplineCoeff(double a, double b, double c, double d,
		242	double dist)
		243	{
		244	if (dist <= 1.0)
		245	return ((d * dist + c) * dist + b) * dist + a;
		246	else
		247	return getSplineCoeff(0.0,
		248	b + 2.0 * c + 3.0 * d,
		249	c + 3.0 * d,
		250	-b - 3.0 * c - 6.0 * d,
		251	dist - 1.0);
		252	}
		253
		254	static av_cold int get_local_pos(SwsContext *s, int chr_subsample, int pos, int dir)
		255	{
		256	if (pos < 0) {
		257	pos = (128 << chr_subsample) - 128;
		258	}
		259	pos += 128; // relative to ideal left edge
		260	return pos >> chr_subsample;
		261	}
		262
		263	static av_cold int initFilter(int16_t outFilter, int32_t filterPos,
		264	int *outFilterSize, int xInc, int srcW,
		265	int dstW, int filterAlign, int one,
		266	int flags, int cpu_flags,
		267	SwsVector srcFilter, SwsVector dstFilter,
		268	double param[2], int srcPos, int dstPos)
		269	{
		270	int i;
		271	int filterSize;
		272	int filter2Size;
		273	int minFilterSize;
		274	int64_t *filter = NULL;
		275	int64_t *filter2 = NULL;
		276	const int64_t fone = 1LL << (54 - FFMIN(av_log2(srcW/dstW), 8));
		277	int ret = -1;
		278
		279	emms_c(); // FIXME should not be required but IS (even for non-MMX versions)
		280
		281	// NOTE: the +3 is for the MMX(+1) / SSE(+3) scaler which reads over the end
		282	FF_ALLOC_OR_GOTO(NULL, filterPos, (dstW + 3) sizeof(**filterPos), fail);
		283
		284	if (FFABS(xInc - 0x10000) < 10 && srcPos == dstPos) { // unscaled
		285	int i;
		286	filterSize = 1;
		287	FF_ALLOCZ_OR_GOTO(NULL, filter,
		288	dstW * sizeof(filter) filterSize, fail);
		289
		290	for (i = 0; i < dstW; i++) {
		291	filter[i * filterSize] = fone;
		292	(*filterPos)[i] = i;
		293	}
		294	} else if (flags & SWS_POINT) { // lame looking point sampling mode
		295	int i;
		296	int64_t xDstInSrc;
		297	filterSize = 1;
		298	FF_ALLOC_OR_GOTO(NULL, filter,
		299	dstW * sizeof(filter) filterSize, fail);
		300
		301	xDstInSrc = ((dstPos(int64_t)xInc)>>8) - ((srcPos0x8000LL)>>7);
		302	for (i = 0; i < dstW; i++) {
		303	int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
		304
		305	(*filterPos)[i] = xx;
		306	filter[i] = fone;
		307	xDstInSrc += xInc;
		308	}
		309	} else if ((xInc <= (1 << 16) && (flags & SWS_AREA)) \|\|
		310	(flags & SWS_FAST_BILINEAR)) { // bilinear upscale
		311	int i;
		312	int64_t xDstInSrc;
		313	filterSize = 2;
		314	FF_ALLOC_OR_GOTO(NULL, filter,
		315	dstW * sizeof(filter) filterSize, fail);
		316
		317	xDstInSrc = ((dstPos(int64_t)xInc)>>8) - ((srcPos0x8000LL)>>7);
		318	for (i = 0; i < dstW; i++) {
		319	int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
		320	int j;
		321
		322	(*filterPos)[i] = xx;
		323	// bilinear upscale / linear interpolate / area averaging
		324	for (j = 0; j < filterSize; j++) {
		325	int64_t coeff= fone - FFABS(((int64_t)xx<<16) - xDstInSrc)*(fone>>16);
		326	if (coeff < 0)
		327	coeff = 0;
		328	filter[i * filterSize + j] = coeff;
		329	xx++;
		330	}
		331	xDstInSrc += xInc;
		332	}
		333	} else {
		334	int64_t xDstInSrc;
		335	int sizeFactor;
		336
		337	if (flags & SWS_BICUBIC)
		338	sizeFactor = 4;
		339	else if (flags & SWS_X)
		340	sizeFactor = 8;
		341	else if (flags & SWS_AREA)
		342	sizeFactor = 1; // downscale only, for upscale it is bilinear
		343	else if (flags & SWS_GAUSS)
		344	sizeFactor = 8; // infinite ;)
		345	else if (flags & SWS_LANCZOS)
		346	sizeFactor = param[0] != SWS_PARAM_DEFAULT ? ceil(2 * param[0]) : 6;
		347	else if (flags & SWS_SINC)
		348	sizeFactor = 20; // infinite ;)
		349	else if (flags & SWS_SPLINE)
		350	sizeFactor = 20; // infinite ;)
		351	else if (flags & SWS_BILINEAR)
		352	sizeFactor = 2;
		353	else {
		354	av_assert0(0);
		355	}
		356
		357	if (xInc <= 1 << 16)
		358	filterSize = 1 + sizeFactor; // upscale
		359	else
		360	filterSize = 1 + (sizeFactor * srcW + dstW - 1) / dstW;
		361
		362	filterSize = FFMIN(filterSize, srcW - 2);
		363	filterSize = FFMAX(filterSize, 1);
		364
		365	FF_ALLOC_OR_GOTO(NULL, filter,
		366	dstW * sizeof(filter) filterSize, fail);
		367
		368	xDstInSrc = ((dstPos(int64_t)xInc)>>7) - ((srcPos0x10000LL)>>7);
		369	for (i = 0; i < dstW; i++) {
		370	int xx = (xDstInSrc - ((filterSize - 2) << 16)) / (1 << 17);
		371	int j;
		372	(*filterPos)[i] = xx;
		373	for (j = 0; j < filterSize; j++) {
		374	int64_t d = (FFABS(((int64_t)xx << 17) - xDstInSrc)) << 13;
		375	double floatd;
		376	int64_t coeff;
		377
		378	if (xInc > 1 << 16)
		379	d = d * dstW / srcW;
		380	floatd = d * (1.0 / (1 << 30));
		381
		382	if (flags & SWS_BICUBIC) {
		383	int64_t B = (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1 << 24);
		384	int64_t C = (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1 << 24);
		385
		386	if (d >= 1LL << 31) {
		387	coeff = 0.0;
		388	} else {
		389	int64_t dd = (d * d) >> 30;
		390	int64_t ddd = (dd * d) >> 30;
		391
		392	if (d < 1LL << 30)
		393	coeff = (12 * (1 << 24) - 9 * B - 6 * C) * ddd +
		394	(-18 * (1 << 24) + 12 * B + 6 * C) * dd +
		395	(6 * (1 << 24) - 2 * B) * (1 << 30);
		396	else
		397	coeff = (-B - 6 * C) * ddd +
		398	(6 * B + 30 * C) * dd +
		399	(-12 * B - 48 * C) * d +
		400	(8 * B + 24 * C) * (1 << 30);
		401	}
		402	coeff /= (1LL<<54)/fone;
		403	}
		404	#if 0
		405	else if (flags & SWS_X) {
		406	double p = param ? param * 0.01 : 0.3;
		407	coeff = d ? sin(d * M_PI) / (d * M_PI) : 1.0;
		408	coeff = pow(2.0, -p d * d);
		409	}
		410	#endif
		411	else if (flags & SWS_X) {
		412	double A = param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
		413	double c;
		414
		415	if (floatd < 1.0)
		416	c = cos(floatd * M_PI);
		417	else
		418	c = -1.0;
		419	if (c < 0.0)
		420	c = -pow(-c, A);
		421	else
		422	c = pow(c, A);
		423	coeff = (c * 0.5 + 0.5) * fone;
		424	} else if (flags & SWS_AREA) {
		425	int64_t d2 = d - (1 << 29);
		426	if (d2 * xInc < -(1LL << (29 + 16)))
		427	coeff = 1.0 * (1LL << (30 + 16));
		428	else if (d2 * xInc < (1LL << (29 + 16)))
		429	coeff = -d2 * xInc + (1LL << (29 + 16));
		430	else
		431	coeff = 0.0;
		432	coeff *= fone >> (30 + 16);
		433	} else if (flags & SWS_GAUSS) {
		434	double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
		435	coeff = (pow(2.0, -p * floatd * floatd)) * fone;
		436	} else if (flags & SWS_SINC) {
		437	coeff = (d ? sin(floatd * M_PI) / (floatd * M_PI) : 1.0) * fone;
		438	} else if (flags & SWS_LANCZOS) {
		439	double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
		440	coeff = (d ? sin(floatd * M_PI) * sin(floatd * M_PI / p) /
		441	(floatd * floatd * M_PI * M_PI / p) : 1.0) * fone;
		442	if (floatd > p)
		443	coeff = 0;
		444	} else if (flags & SWS_BILINEAR) {
		445	coeff = (1 << 30) - d;
		446	if (coeff < 0)
		447	coeff = 0;
		448	coeff *= fone >> 30;
		449	} else if (flags & SWS_SPLINE) {
		450	double p = -2.196152422706632;
		451	coeff = getSplineCoeff(1.0, 0.0, p, -p - 1.0, floatd) * fone;
		452	} else {
		453	av_assert0(0);
		454	}
		455
		456	filter[i * filterSize + j] = coeff;
		457	xx++;
		458	}
		459	xDstInSrc += 2 * xInc;
		460	}
		461	}
		462
		463	/* apply src & dst Filter to filter -> filter2
		464	* av_free(filter);
		465	*/
		466	av_assert0(filterSize > 0);
		467	filter2Size = filterSize;
		468	if (srcFilter)
		469	filter2Size += srcFilter->length - 1;
		470	if (dstFilter)
		471	filter2Size += dstFilter->length - 1;
		472	av_assert0(filter2Size > 0);
		473	FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size * dstW * sizeof(*filter2), fail);
		474
		475	for (i = 0; i < dstW; i++) {
		476	int j, k;
		477
		478	if (srcFilter) {
		479	for (k = 0; k < srcFilter->length; k++) {
		480	for (j = 0; j < filterSize; j++)
		481	filter2[i * filter2Size + k + j] +=
		482	srcFilter->coeff[k] * filter[i * filterSize + j];
		483	}
		484	} else {
		485	for (j = 0; j < filterSize; j++)
		486	filter2[i * filter2Size + j] = filter[i * filterSize + j];
		487	}
		488	// FIXME dstFilter
		489
		490	(*filterPos)[i] += (filterSize - 1) / 2 - (filter2Size - 1) / 2;
		491	}
		492	av_freep(&filter);
		493
		494	/* try to reduce the filter-size (step1 find size and shift left) */
		495	// Assume it is near normalized (0.5 or 2.0 is OK but * 0.001 is not).
		496	minFilterSize = 0;
		497	for (i = dstW - 1; i >= 0; i--) {
		498	int min = filter2Size;
		499	int j;
		500	int64_t cutOff = 0.0;
		501
		502	/* get rid of near zero elements on the left by shifting left */
		503	for (j = 0; j < filter2Size; j++) {
		504	int k;
		505	cutOff += FFABS(filter2[i * filter2Size]);
		506
		507	if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
		508	break;
		509
		510	/* preserve monotonicity because the core can't handle the
		511	* filter otherwise */
		512	if (i < dstW - 1 && (filterPos)[i] >= (filterPos)[i + 1])
		513	break;
		514
		515	// move filter coefficients left
		516	for (k = 1; k < filter2Size; k++)
		517	filter2[i * filter2Size + k - 1] = filter2[i * filter2Size + k];
		518	filter2[i * filter2Size + k - 1] = 0;
		519	(*filterPos)[i]++;
		520	}
		521
		522	cutOff = 0;
		523	/* count near zeros on the right */
		524	for (j = filter2Size - 1; j > 0; j--) {
		525	cutOff += FFABS(filter2[i * filter2Size + j]);
		526
		527	if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
		528	break;
		529	min--;
		530	}
		531
		532	if (min > minFilterSize)
		533	minFilterSize = min;
		534	}
		535
		536	if (PPC_ALTIVEC(cpu_flags)) {
		537	// we can handle the special case 4, so we don't want to go the full 8
		538	if (minFilterSize < 5)
		539	filterAlign = 4;
		540
		541	/* We really don't want to waste our time doing useless computation, so
		542	* fall back on the scalar C code for very small filters.
		543	* Vectorizing is worth it only if you have a decent-sized vector. */
		544	if (minFilterSize < 3)
		545	filterAlign = 1;
		546	}
		547
		548	if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
		549	// special case for unscaled vertical filtering
		550	if (minFilterSize == 1 && filterAlign == 2)
		551	filterAlign = 1;
		552	}
		553
		554	av_assert0(minFilterSize > 0);
		555	filterSize = (minFilterSize + (filterAlign - 1)) & (~(filterAlign - 1));
		556	av_assert0(filterSize > 0);
		557	filter = av_malloc(filterSize * dstW * sizeof(*filter));
		558	if (filterSize >= MAX_FILTER_SIZE * 16 /
		559	((flags & SWS_ACCURATE_RND) ? APCK_SIZE : 16) \|\| !filter) {
		560	av_log(NULL, AV_LOG_ERROR, "sws: filterSize %d is too large, try less extreem scaling or increase MAX_FILTER_SIZE and recompile\n", filterSize);
		561	goto fail;
		562	}
		563	*outFilterSize = filterSize;
		564
		565	if (flags & SWS_PRINT_INFO)
		566	av_log(NULL, AV_LOG_VERBOSE,
		567	"SwScaler: reducing / aligning filtersize %d -> %d\n",
		568	filter2Size, filterSize);
		569	/* try to reduce the filter-size (step2 reduce it) */
		570	for (i = 0; i < dstW; i++) {
		571	int j;
		572
		573	for (j = 0; j < filterSize; j++) {
		574	if (j >= filter2Size)
		575	filter[i * filterSize + j] = 0;
		576	else
		577	filter[i * filterSize + j] = filter2[i * filter2Size + j];
		578	if ((flags & SWS_BITEXACT) && j >= minFilterSize)
		579	filter[i * filterSize + j] = 0;
		580	}
		581	}
		582
		583	// FIXME try to align filterPos if possible
		584
		585	// fix borders
		586	for (i = 0; i < dstW; i++) {
		587	int j;
		588	if ((*filterPos)[i] < 0) {
		589	// move filter coefficients left to compensate for filterPos
		590	for (j = 1; j < filterSize; j++) {
		591	int left = FFMAX(j + (*filterPos)[i], 0);
		592	filter[i * filterSize + left] += filter[i * filterSize + j];
		593	filter[i * filterSize + j] = 0;
		594	}
		595	(*filterPos)[i]= 0;
		596	}
		597
		598	if ((*filterPos)[i] + filterSize > srcW) {
		599	int shift = (*filterPos)[i] + filterSize - srcW;
		600	// move filter coefficients right to compensate for filterPos
		601	for (j = filterSize - 2; j >= 0; j--) {
		602	int right = FFMIN(j + shift, filterSize - 1);
		603	filter[i * filterSize + right] += filter[i * filterSize + j];
		604	filter[i * filterSize + j] = 0;
		605	}
		606	(*filterPos)[i]= srcW - filterSize;
		607	}
		608	}
		609
		610	// Note the +1 is for the MMX scaler which reads over the end
		611	/* align at 16 for AltiVec (needed by hScale_altivec_real) */
		612	FF_ALLOCZ_OR_GOTO(NULL, *outFilter,
		613	outFilterSize (dstW + 3) * sizeof(int16_t), fail);
		614
		615	/* normalize & store in outFilter */
		616	for (i = 0; i < dstW; i++) {
		617	int j;
		618	int64_t error = 0;
		619	int64_t sum = 0;
		620
		621	for (j = 0; j < filterSize; j++) {
		622	sum += filter[i * filterSize + j];
		623	}
		624	sum = (sum + one / 2) / one;
		625	if (!sum) {
		626	av_log(NULL, AV_LOG_WARNING, "SwScaler: zero vector in scaling\n");
		627	sum = 1;
		628	}
		629	for (j = 0; j < *outFilterSize; j++) {
		630	int64_t v = filter[i * filterSize + j] + error;
		631	int intV = ROUNDED_DIV(v, sum);
		632	(outFilter)[i (*outFilterSize) + j] = intV;
		633	error = v - intV * sum;
		634	}
		635	}
		636
		637	(*filterPos)[dstW + 0] =
		638	(*filterPos)[dstW + 1] =
		639	(filterPos)[dstW + 2] = (filterPos)[dstW - 1]; /* the MMX/SSE scaler will
		640	* read over the end */
		641	for (i = 0; i < *outFilterSize; i++) {
		642	int k = (dstW - 1) * (*outFilterSize) + i;
		643	(outFilter)[k + 1 (*outFilterSize)] =
		644	(outFilter)[k + 2 (*outFilterSize)] =
		645	(outFilter)[k + 3 (outFilterSize)] = (outFilter)[k];
		646	}
		647
		648	ret = 0;
		649
		650	fail:
		651	if(ret < 0)
		652	av_log(NULL, AV_LOG_ERROR, "sws: initFilter failed\n");
		653	av_free(filter);
		654	av_free(filter2);
		655	return ret;
		656	}
		657
		658	#if HAVE_MMXEXT_INLINE
		659	static av_cold int init_hscaler_mmxext(int dstW, int xInc, uint8_t *filterCode,
		660	int16_t filter, int32_t filterPos,
		661	int numSplits)
		662	{
		663	uint8_t *fragmentA;
		664	x86_reg imm8OfPShufW1A;
		665	x86_reg imm8OfPShufW2A;
		666	x86_reg fragmentLengthA;
		667	uint8_t *fragmentB;
		668	x86_reg imm8OfPShufW1B;
		669	x86_reg imm8OfPShufW2B;
		670	x86_reg fragmentLengthB;
		671	int fragmentPos;
		672
		673	int xpos, i;
		674
		675	// create an optimized horizontal scaling routine
		676	/* This scaler is made of runtime-generated MMXEXT code using specially tuned
		677	* pshufw instructions. For every four output pixels, if four input pixels
		678	* are enough for the fast bilinear scaling, then a chunk of fragmentB is
		679	* used. If five input pixels are needed, then a chunk of fragmentA is used.
		680	*/
		681
		682	// code fragment
		683
		684	__asm__ volatile (
		685	"jmp 9f \n\t"
		686	// Begin
		687	"0: \n\t"
		688	"movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t"
		689	"movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t"
		690	"movd 1(%%"REG_c", %%"REG_S"), %%mm1 \n\t"
		691	"punpcklbw %%mm7, %%mm1 \n\t"
		692	"punpcklbw %%mm7, %%mm0 \n\t"
		693	"pshufw $0xFF, %%mm1, %%mm1 \n\t"
		694	"1: \n\t"
		695	"pshufw $0xFF, %%mm0, %%mm0 \n\t"
		696	"2: \n\t"
		697	"psubw %%mm1, %%mm0 \n\t"
		698	"movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t"
		699	"pmullw %%mm3, %%mm0 \n\t"
		700	"psllw $7, %%mm1 \n\t"
		701	"paddw %%mm1, %%mm0 \n\t"
		702
		703	"movq %%mm0, (%%"REG_D", %%"REG_a") \n\t"
		704
		705	"add $8, %%"REG_a" \n\t"
		706	// End
		707	"9: \n\t"
		708	// "int $3 \n\t"
		709	"lea " LOCAL_MANGLE(0b) ", %0 \n\t"
		710	"lea " LOCAL_MANGLE(1b) ", %1 \n\t"
		711	"lea " LOCAL_MANGLE(2b) ", %2 \n\t"
		712	"dec %1 \n\t"
		713	"dec %2 \n\t"
		714	"sub %0, %1 \n\t"
		715	"sub %0, %2 \n\t"
		716	"lea " LOCAL_MANGLE(9b) ", %3 \n\t"
		717	"sub %0, %3 \n\t"
		718
		719
		720	: "=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),
		721	"=r" (fragmentLengthA)
		722	);
		723
		724	__asm__ volatile (
		725	"jmp 9f \n\t"
		726	// Begin
		727	"0: \n\t"
		728	"movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t"
		729	"movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t"
		730	"punpcklbw %%mm7, %%mm0 \n\t"
		731	"pshufw $0xFF, %%mm0, %%mm1 \n\t"
		732	"1: \n\t"
		733	"pshufw $0xFF, %%mm0, %%mm0 \n\t"
		734	"2: \n\t"
		735	"psubw %%mm1, %%mm0 \n\t"
		736	"movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t"
		737	"pmullw %%mm3, %%mm0 \n\t"
		738	"psllw $7, %%mm1 \n\t"
		739	"paddw %%mm1, %%mm0 \n\t"
		740
		741	"movq %%mm0, (%%"REG_D", %%"REG_a") \n\t"
		742
		743	"add $8, %%"REG_a" \n\t"
		744	// End
		745	"9: \n\t"
		746	// "int $3 \n\t"
		747	"lea " LOCAL_MANGLE(0b) ", %0 \n\t"
		748	"lea " LOCAL_MANGLE(1b) ", %1 \n\t"
		749	"lea " LOCAL_MANGLE(2b) ", %2 \n\t"
		750	"dec %1 \n\t"
		751	"dec %2 \n\t"
		752	"sub %0, %1 \n\t"
		753	"sub %0, %2 \n\t"
		754	"lea " LOCAL_MANGLE(9b) ", %3 \n\t"
		755	"sub %0, %3 \n\t"
		756
		757
		758	: "=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),
		759	"=r" (fragmentLengthB)
		760	);
		761
		762	xpos = 0; // lumXInc/2 - 0x8000; // difference between pixel centers
		763	fragmentPos = 0;
		764
		765	for (i = 0; i < dstW / numSplits; i++) {
		766	int xx = xpos >> 16;
		767
		768	if ((i & 3) == 0) {
		769	int a = 0;
		770	int b = ((xpos + xInc) >> 16) - xx;
		771	int c = ((xpos + xInc * 2) >> 16) - xx;
		772	int d = ((xpos + xInc * 3) >> 16) - xx;
		773	int inc = (d + 1 < 4);
		774	uint8_t *fragment = (d + 1 < 4) ? fragmentB : fragmentA;
		775	x86_reg imm8OfPShufW1 = (d + 1 < 4) ? imm8OfPShufW1B : imm8OfPShufW1A;
		776	x86_reg imm8OfPShufW2 = (d + 1 < 4) ? imm8OfPShufW2B : imm8OfPShufW2A;
		777	x86_reg fragmentLength = (d + 1 < 4) ? fragmentLengthB : fragmentLengthA;
		778	int maxShift = 3 - (d + inc);
		779	int shift = 0;
		780
		781	if (filterCode) {
		782	filter[i] = ((xpos & 0xFFFF) ^ 0xFFFF) >> 9;
		783	filter[i + 1] = (((xpos + xInc) & 0xFFFF) ^ 0xFFFF) >> 9;
		784	filter[i + 2] = (((xpos + xInc * 2) & 0xFFFF) ^ 0xFFFF) >> 9;
		785	filter[i + 3] = (((xpos + xInc * 3) & 0xFFFF) ^ 0xFFFF) >> 9;
		786	filterPos[i / 2] = xx;
		787
		788	memcpy(filterCode + fragmentPos, fragment, fragmentLength);
		789
		790	filterCode[fragmentPos + imm8OfPShufW1] = (a + inc) \|
		791	((b + inc) << 2) \|
		792	((c + inc) << 4) \|
		793	((d + inc) << 6);
		794	filterCode[fragmentPos + imm8OfPShufW2] = a \| (b << 2) \|
		795	(c << 4) \|
		796	(d << 6);
		797
		798	if (i + 4 - inc >= dstW)
		799	shift = maxShift; // avoid overread
		800	else if ((filterPos[i / 2] & 3) <= maxShift)
		801	shift = filterPos[i / 2] & 3; // align
		802
		803	if (shift && i >= shift) {
		804	filterCode[fragmentPos + imm8OfPShufW1] += 0x55 * shift;
		805	filterCode[fragmentPos + imm8OfPShufW2] += 0x55 * shift;
		806	filterPos[i / 2] -= shift;
		807	}
		808	}
		809
		810	fragmentPos += fragmentLength;
		811
		812	if (filterCode)
		813	filterCode[fragmentPos] = RET;
		814	}
		815	xpos += xInc;
		816	}
		817	if (filterCode)
		818	filterPos[((i / 2) + 1) & (~1)] = xpos >> 16; // needed to jump to the next part
		819
		820	return fragmentPos + 1;
		821	}
		822	#endif /* HAVE_MMXEXT_INLINE */
		823
		824	static void fill_rgb2yuv_table(SwsContext *c, const int table[4], int dstRange)
		825	{
		826	int64_t W, V, Z, Cy, Cu, Cv;
		827	int64_t vr = table[0];
		828	int64_t ub = table[1];
		829	int64_t ug = -table[2];
		830	int64_t vg = -table[3];
		831	int64_t ONE = 65536;
		832	int64_t cy = ONE;
		833	uint8_t p = (uint8_t)c->input_rgb2yuv_table;
		834	int i;
		835	static const int8_t map[] = {
		836	BY_IDX, GY_IDX, -1 , BY_IDX, BY_IDX, GY_IDX, -1 , BY_IDX,
		837	RY_IDX, -1 , GY_IDX, RY_IDX, RY_IDX, -1 , GY_IDX, RY_IDX,
		838	RY_IDX, GY_IDX, -1 , RY_IDX, RY_IDX, GY_IDX, -1 , RY_IDX,
		839	BY_IDX, -1 , GY_IDX, BY_IDX, BY_IDX, -1 , GY_IDX, BY_IDX,
		840	BU_IDX, GU_IDX, -1 , BU_IDX, BU_IDX, GU_IDX, -1 , BU_IDX,
		841	RU_IDX, -1 , GU_IDX, RU_IDX, RU_IDX, -1 , GU_IDX, RU_IDX,
		842	RU_IDX, GU_IDX, -1 , RU_IDX, RU_IDX, GU_IDX, -1 , RU_IDX,
		843	BU_IDX, -1 , GU_IDX, BU_IDX, BU_IDX, -1 , GU_IDX, BU_IDX,
		844	BV_IDX, GV_IDX, -1 , BV_IDX, BV_IDX, GV_IDX, -1 , BV_IDX,
		845	RV_IDX, -1 , GV_IDX, RV_IDX, RV_IDX, -1 , GV_IDX, RV_IDX,
		846	RV_IDX, GV_IDX, -1 , RV_IDX, RV_IDX, GV_IDX, -1 , RV_IDX,
		847	BV_IDX, -1 , GV_IDX, BV_IDX, BV_IDX, -1 , GV_IDX, BV_IDX,
		848	RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX,
		849	BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX,
		850	GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 ,
		851	-1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX,
		852	RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX,
		853	BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX,
		854	GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 ,
		855	-1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX,
		856	RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX,
		857	BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX,
		858	GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 ,
		859	-1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, //23
		860	-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //24
		861	-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //25
		862	-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //26
		863	-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //27
		864	-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //28
		865	-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //29
		866	-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //30
		867	-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //31
		868	BY_IDX, GY_IDX, RY_IDX, -1 , -1 , -1 , -1 , -1 , //32
		869	BU_IDX, GU_IDX, RU_IDX, -1 , -1 , -1 , -1 , -1 , //33
		870	BV_IDX, GV_IDX, RV_IDX, -1 , -1 , -1 , -1 , -1 , //34
		871	};
		872
		873	dstRange = 0; //FIXME range = 1 is handled elsewhere
		874
		875	if (!dstRange) {
		876	cy = cy * 255 / 219;
		877	} else {
		878	vr = vr * 224 / 255;
		879	ub = ub * 224 / 255;
		880	ug = ug * 224 / 255;
		881	vg = vg * 224 / 255;
		882	}
		883	W = ROUNDED_DIV(ONEONEug, ub);
		884	V = ROUNDED_DIV(ONEONEvg, vr);
		885	Z = ONE*ONE-W-V;
		886
		887	Cy = ROUNDED_DIV(cy*Z, ONE);
		888	Cu = ROUNDED_DIV(ub*Z, ONE);
		889	Cv = ROUNDED_DIV(vr*Z, ONE);
		890
		891	c->input_rgb2yuv_table[RY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cy);
		892	c->input_rgb2yuv_table[GY_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)ONEONE , Cy);
		893	c->input_rgb2yuv_table[BY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cy);
		894
		895	c->input_rgb2yuv_table[RU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cu);
		896	c->input_rgb2yuv_table[GU_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)ONEONE , Cu);
		897	c->input_rgb2yuv_table[BU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(Z+W) , Cu);
		898
		899	c->input_rgb2yuv_table[RV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(V+Z) , Cv);
		900	c->input_rgb2yuv_table[GV_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)ONEONE , Cv);
		901	c->input_rgb2yuv_table[BV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cv);
		902
		903	if(/!dstRange && /!memcmp(table, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], sizeof(ff_yuv2rgb_coeffs[SWS_CS_DEFAULT]))) {
		904	c->input_rgb2yuv_table[BY_IDX] = ((int)(0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
		905	c->input_rgb2yuv_table[BV_IDX] = (-(int)(0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
		906	c->input_rgb2yuv_table[BU_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
		907	c->input_rgb2yuv_table[GY_IDX] = ((int)(0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
		908	c->input_rgb2yuv_table[GV_IDX] = (-(int)(0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
		909	c->input_rgb2yuv_table[GU_IDX] = (-(int)(0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
		910	c->input_rgb2yuv_table[RY_IDX] = ((int)(0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
		911	c->input_rgb2yuv_table[RV_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
		912	c->input_rgb2yuv_table[RU_IDX] = (-(int)(0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
		913	}
		914	for(i=0; i
		915	AV_WL16(p + 164 + 2i, map[i] >= 0 ? c->input_rgb2yuv_table[map[i]] : 0);
		916	}
		917
		918	static void fill_xyztables(struct SwsContext *c)
		919	{
		920	int i;
		921	double xyzgamma = XYZ_GAMMA;
		922	double rgbgamma = 1.0 / RGB_GAMMA;
		923	double xyzgammainv = 1.0 / XYZ_GAMMA;
		924	double rgbgammainv = RGB_GAMMA;
		925	static const int16_t xyz2rgb_matrix[3][4] = {
		926	{13270, -6295, -2041},
		927	{-3969, 7682, 170},
		928	{ 228, -835, 4329} };
		929	static const int16_t rgb2xyz_matrix[3][4] = {
		930	{1689, 1464, 739},
		931	{ 871, 2929, 296},
		932	{ 79, 488, 3891} };
		933	static int16_t xyzgamma_tab[4096], rgbgamma_tab[4096], xyzgammainv_tab[4096], rgbgammainv_tab[4096];
		934
		935	memcpy(c->xyz2rgb_matrix, xyz2rgb_matrix, sizeof(c->xyz2rgb_matrix));
		936	memcpy(c->rgb2xyz_matrix, rgb2xyz_matrix, sizeof(c->rgb2xyz_matrix));
		937	c->xyzgamma = xyzgamma_tab;
		938	c->rgbgamma = rgbgamma_tab;
		939	c->xyzgammainv = xyzgammainv_tab;
		940	c->rgbgammainv = rgbgammainv_tab;
		941
		942	if (rgbgamma_tab[4095])
		943	return;
		944
		945	/* set gamma vectors */
		946	for (i = 0; i < 4096; i++) {
		947	xyzgamma_tab[i] = lrint(pow(i / 4095.0, xyzgamma) * 4095.0);
		948	rgbgamma_tab[i] = lrint(pow(i / 4095.0, rgbgamma) * 4095.0);
		949	xyzgammainv_tab[i] = lrint(pow(i / 4095.0, xyzgammainv) * 4095.0);
		950	rgbgammainv_tab[i] = lrint(pow(i / 4095.0, rgbgammainv) * 4095.0);
		951	}
		952	}
		953
		954	int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
		955	int srcRange, const int table[4], int dstRange,
		956	int brightness, int contrast, int saturation)
		957	{
		958	const AVPixFmtDescriptor *desc_dst;
		959	const AVPixFmtDescriptor *desc_src;
		960	memmove(c->srcColorspaceTable, inv_table, sizeof(int) * 4);
		961	memmove(c->dstColorspaceTable, table, sizeof(int) * 4);
		962
		963	handle_formats(c);
		964	desc_dst = av_pix_fmt_desc_get(c->dstFormat);
		965	desc_src = av_pix_fmt_desc_get(c->srcFormat);
		966
		967	if(!isYUV(c->dstFormat) && !isGray(c->dstFormat))
		968	dstRange = 0;
		969	if(!isYUV(c->srcFormat) && !isGray(c->srcFormat))
		970	srcRange = 0;
		971
		972	c->brightness = brightness;
		973	c->contrast = contrast;
		974	c->saturation = saturation;
		975	c->srcRange = srcRange;
		976	c->dstRange = dstRange;
		977
		978	fill_xyztables(c);
		979
		980	if ((isYUV(c->dstFormat) \|\| isGray(c->dstFormat)) && (isYUV(c->srcFormat) \|\| isGray(c->srcFormat)))
		981	return -1;
		982
		983	c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
		984	c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
		985
		986	if (!isYUV(c->dstFormat) && !isGray(c->dstFormat)) {
		987	ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness,
		988	contrast, saturation);
		989	// FIXME factorize
		990
		991	if (ARCH_PPC)
		992	ff_yuv2rgb_init_tables_ppc(c, inv_table, brightness,
		993	contrast, saturation);
		994	}
		995
		996	fill_rgb2yuv_table(c, table, dstRange);
		997
		998	return 0;
		999	}
		1000
		1001	int sws_getColorspaceDetails(struct SwsContext c, int *inv_table,
		1002	int srcRange, int table, int dstRange,
		1003	int brightness, int contrast, int *saturation)
		1004	{
		1005	if (!c )
		1006	return -1;
		1007
		1008	*inv_table = c->srcColorspaceTable;
		1009	*table = c->dstColorspaceTable;
		1010	*srcRange = c->srcRange;
		1011	*dstRange = c->dstRange;
		1012	*brightness = c->brightness;
		1013	*contrast = c->contrast;
		1014	*saturation = c->saturation;
		1015
		1016	return 0;
		1017	}
		1018
		1019	static int handle_jpeg(enum AVPixelFormat *format)
		1020	{
		1021	switch (*format) {
		1022	case AV_PIX_FMT_YUVJ420P:
		1023	*format = AV_PIX_FMT_YUV420P;
		1024	return 1;
		1025	case AV_PIX_FMT_YUVJ411P:
		1026	*format = AV_PIX_FMT_YUV411P;
		1027	return 1;
		1028	case AV_PIX_FMT_YUVJ422P:
		1029	*format = AV_PIX_FMT_YUV422P;
		1030	return 1;
		1031	case AV_PIX_FMT_YUVJ444P:
		1032	*format = AV_PIX_FMT_YUV444P;
		1033	return 1;
		1034	case AV_PIX_FMT_YUVJ440P:
		1035	*format = AV_PIX_FMT_YUV440P;
		1036	return 1;
		1037	case AV_PIX_FMT_GRAY8:
		1038	return 1;
		1039	default:
		1040	return 0;
		1041	}
		1042	}
		1043
		1044	static int handle_0alpha(enum AVPixelFormat *format)
		1045	{
		1046	switch (*format) {
		1047	case AV_PIX_FMT_0BGR : *format = AV_PIX_FMT_ABGR ; return 1;
		1048	case AV_PIX_FMT_BGR0 : *format = AV_PIX_FMT_BGRA ; return 4;
		1049	case AV_PIX_FMT_0RGB : *format = AV_PIX_FMT_ARGB ; return 1;
		1050	case AV_PIX_FMT_RGB0 : *format = AV_PIX_FMT_RGBA ; return 4;
		1051	default: return 0;
		1052	}
		1053	}
		1054
		1055	static int handle_xyz(enum AVPixelFormat *format)
		1056	{
		1057	switch (*format) {
		1058	case AV_PIX_FMT_XYZ12BE : *format = AV_PIX_FMT_RGB48BE; return 1;
		1059	case AV_PIX_FMT_XYZ12LE : *format = AV_PIX_FMT_RGB48LE; return 1;
		1060	default: return 0;
		1061	}
		1062	}
		1063
		1064	static void handle_formats(SwsContext *c)
		1065	{
		1066	c->src0Alpha \|= handle_0alpha(&c->srcFormat);
		1067	c->dst0Alpha \|= handle_0alpha(&c->dstFormat);
		1068	c->srcXYZ \|= handle_xyz(&c->srcFormat);
		1069	c->dstXYZ \|= handle_xyz(&c->dstFormat);
		1070	}
		1071
		1072	SwsContext *sws_alloc_context(void)
		1073	{
		1074	SwsContext *c = av_mallocz(sizeof(SwsContext));
		1075
		1076	if (c) {
		1077	c->av_class = &sws_context_class;
		1078	av_opt_set_defaults(c);
		1079	}
		1080
		1081	return c;
		1082	}
		1083
		1084	av_cold int sws_init_context(SwsContext c, SwsFilter srcFilter,
		1085	SwsFilter *dstFilter)
		1086	{
		1087	int i, j;
		1088	int usesVFilter, usesHFilter;
		1089	int unscaled;
		1090	SwsFilter dummyFilter = { NULL, NULL, NULL, NULL };
		1091	int srcW = c->srcW;
		1092	int srcH = c->srcH;
		1093	int dstW = c->dstW;
		1094	int dstH = c->dstH;
		1095	int dst_stride = FFALIGN(dstW * sizeof(int16_t) + 66, 16);
		1096	int flags, cpu_flags;
		1097	enum AVPixelFormat srcFormat = c->srcFormat;
		1098	enum AVPixelFormat dstFormat = c->dstFormat;
		1099	const AVPixFmtDescriptor *desc_src;
		1100	const AVPixFmtDescriptor *desc_dst;
		1101
		1102	cpu_flags = av_get_cpu_flags();
		1103	flags = c->flags;
		1104	emms_c();
		1105	if (!rgb15to16)
		1106	sws_rgb2rgb_init();
		1107
		1108	unscaled = (srcW == dstW && srcH == dstH);
		1109
		1110	c->srcRange \|= handle_jpeg(&c->srcFormat);
		1111	c->dstRange \|= handle_jpeg(&c->dstFormat);
		1112
		1113	if (!c->contrast && !c->saturation && !c->dstFormatBpp)
		1114	sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], c->srcRange,
		1115	ff_yuv2rgb_coeffs[SWS_CS_DEFAULT],
		1116	c->dstRange, 0, 1 << 16, 1 << 16);
		1117
		1118	if(srcFormat!=c->srcFormat \|\| dstFormat!=c->dstFormat)
		1119	av_log(c, AV_LOG_WARNING, "deprecated pixel format used, make sure you did set range correctly\n");
		1120	handle_formats(c);
		1121	srcFormat = c->srcFormat;
		1122	dstFormat = c->dstFormat;
		1123	desc_src = av_pix_fmt_desc_get(srcFormat);
		1124	desc_dst = av_pix_fmt_desc_get(dstFormat);
		1125
		1126	if (!(unscaled && sws_isSupportedEndiannessConversion(srcFormat) &&
		1127	av_pix_fmt_swap_endianness(srcFormat) == dstFormat)) {
		1128	if (!sws_isSupportedInput(srcFormat)) {
		1129	av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n",
		1130	av_get_pix_fmt_name(srcFormat));
		1131	return AVERROR(EINVAL);
		1132	}
		1133	if (!sws_isSupportedOutput(dstFormat)) {
		1134	av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n",
		1135	av_get_pix_fmt_name(dstFormat));
		1136	return AVERROR(EINVAL);
		1137	}
		1138	}
		1139
		1140	i = flags & (SWS_POINT \|
		1141	SWS_AREA \|
		1142	SWS_BILINEAR \|
		1143	SWS_FAST_BILINEAR \|
		1144	SWS_BICUBIC \|
		1145	SWS_X \|
		1146	SWS_GAUSS \|
		1147	SWS_LANCZOS \|
		1148	SWS_SINC \|
		1149	SWS_SPLINE \|
		1150	SWS_BICUBLIN);
		1151
		1152	/* provide a default scaler if not set by caller */
		1153	if (!i) {
		1154	if (dstW < srcW && dstH < srcH)
		1155	flags \|= SWS_BICUBIC;
		1156	else if (dstW > srcW && dstH > srcH)
		1157	flags \|= SWS_BICUBIC;
		1158	else
		1159	flags \|= SWS_BICUBIC;
		1160	c->flags = flags;
		1161	} else if (i & (i - 1)) {
		1162	av_log(c, AV_LOG_ERROR,
		1163	"Exactly one scaler algorithm must be chosen, got %X\n", i);
		1164	return AVERROR(EINVAL);
		1165	}
		1166	/* sanity check */
		1167	if (srcW < 1 \|\| srcH < 1 \|\| dstW < 1 \|\| dstH < 1) {
		1168	/* FIXME check if these are enough and try to lower them after
		1169	* fixing the relevant parts of the code */
		1170	av_log(c, AV_LOG_ERROR, "%dx%d -> %dx%d is invalid scaling dimension\n",
		1171	srcW, srcH, dstW, dstH);
		1172	return AVERROR(EINVAL);
		1173	}
		1174
		1175	if (!dstFilter)
		1176	dstFilter = &dummyFilter;
		1177	if (!srcFilter)
		1178	srcFilter = &dummyFilter;
		1179
		1180	c->lumXInc = (((int64_t)srcW << 16) + (dstW >> 1)) / dstW;
		1181	c->lumYInc = (((int64_t)srcH << 16) + (dstH >> 1)) / dstH;
		1182	c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
		1183	c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
		1184	c->vRounder = 4 * 0x0001000100010001ULL;
		1185
		1186	usesVFilter = (srcFilter->lumV && srcFilter->lumV->length > 1) \|\|
		1187	(srcFilter->chrV && srcFilter->chrV->length > 1) \|\|
		1188	(dstFilter->lumV && dstFilter->lumV->length > 1) \|\|
		1189	(dstFilter->chrV && dstFilter->chrV->length > 1);
		1190	usesHFilter = (srcFilter->lumH && srcFilter->lumH->length > 1) \|\|
		1191	(srcFilter->chrH && srcFilter->chrH->length > 1) \|\|
		1192	(dstFilter->lumH && dstFilter->lumH->length > 1) \|\|
		1193	(dstFilter->chrH && dstFilter->chrH->length > 1);
		1194
		1195	av_pix_fmt_get_chroma_sub_sample(srcFormat, &c->chrSrcHSubSample, &c->chrSrcVSubSample);
		1196	av_pix_fmt_get_chroma_sub_sample(dstFormat, &c->chrDstHSubSample, &c->chrDstVSubSample);
		1197
		1198	if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) {
		1199	if (dstW&1) {
		1200	av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to odd output size\n");
		1201	flags \|= SWS_FULL_CHR_H_INT;
		1202	c->flags = flags;
		1203	}
		1204
		1205	if ( c->chrSrcHSubSample == 0
		1206	&& c->chrSrcVSubSample == 0
		1207	&& c->dither != SWS_DITHER_BAYER //SWS_FULL_CHR_H_INT is currently not supported with SWS_DITHER_BAYER
		1208	&& !(c->flags & SWS_FAST_BILINEAR)
		1209	) {
		1210	av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to input having non subsampled chroma\n");
		1211	flags \|= SWS_FULL_CHR_H_INT;
		1212	c->flags = flags;
		1213	}
		1214	}
		1215
		1216	if (c->dither == SWS_DITHER_AUTO) {
		1217	if (flags & SWS_ERROR_DIFFUSION)
		1218	c->dither = SWS_DITHER_ED;
		1219	}
		1220
		1221	if(dstFormat == AV_PIX_FMT_BGR4_BYTE \|\|
		1222	dstFormat == AV_PIX_FMT_RGB4_BYTE \|\|
		1223	dstFormat == AV_PIX_FMT_BGR8 \|\|
		1224	dstFormat == AV_PIX_FMT_RGB8) {
		1225	if (c->dither == SWS_DITHER_AUTO)
		1226	c->dither = (flags & SWS_FULL_CHR_H_INT) ? SWS_DITHER_ED : SWS_DITHER_BAYER;
		1227	if (!(flags & SWS_FULL_CHR_H_INT)) {
		1228	if (c->dither == SWS_DITHER_ED) {
		1229	av_log(c, AV_LOG_DEBUG,
		1230	"Desired dithering only supported in full chroma interpolation for destination format '%s'\n",
		1231	av_get_pix_fmt_name(dstFormat));
		1232	flags \|= SWS_FULL_CHR_H_INT;
		1233	c->flags = flags;
		1234	}
		1235	}
		1236	if (flags & SWS_FULL_CHR_H_INT) {
		1237	if (c->dither == SWS_DITHER_BAYER) {
		1238	av_log(c, AV_LOG_DEBUG,
		1239	"Ordered dither is not supported in full chroma interpolation for destination format '%s'\n",
		1240	av_get_pix_fmt_name(dstFormat));
		1241	c->dither = SWS_DITHER_ED;
		1242	}
		1243	}
		1244	}
		1245	if (isPlanarRGB(dstFormat)) {
		1246	if (!(flags & SWS_FULL_CHR_H_INT)) {
		1247	av_log(c, AV_LOG_DEBUG,
		1248	"%s output is not supported with half chroma resolution, switching to full\n",
		1249	av_get_pix_fmt_name(dstFormat));
		1250	flags \|= SWS_FULL_CHR_H_INT;
		1251	c->flags = flags;
		1252	}
		1253	}
		1254
		1255	/* reuse chroma for 2 pixels RGB/BGR unless user wants full
		1256	* chroma interpolation */
		1257	if (flags & SWS_FULL_CHR_H_INT &&
		1258	isAnyRGB(dstFormat) &&
		1259	!isPlanarRGB(dstFormat) &&
		1260	dstFormat != AV_PIX_FMT_RGBA &&
		1261	dstFormat != AV_PIX_FMT_ARGB &&
		1262	dstFormat != AV_PIX_FMT_BGRA &&
		1263	dstFormat != AV_PIX_FMT_ABGR &&
		1264	dstFormat != AV_PIX_FMT_RGB24 &&
		1265	dstFormat != AV_PIX_FMT_BGR24 &&
		1266	dstFormat != AV_PIX_FMT_BGR4_BYTE &&
		1267	dstFormat != AV_PIX_FMT_RGB4_BYTE &&
		1268	dstFormat != AV_PIX_FMT_BGR8 &&
		1269	dstFormat != AV_PIX_FMT_RGB8
		1270	) {
		1271	av_log(c, AV_LOG_WARNING,
		1272	"full chroma interpolation for destination format '%s' not yet implemented\n",
		1273	av_get_pix_fmt_name(dstFormat));
		1274	flags &= ~SWS_FULL_CHR_H_INT;
		1275	c->flags = flags;
		1276	}
		1277	if (isAnyRGB(dstFormat) && !(flags & SWS_FULL_CHR_H_INT))
		1278	c->chrDstHSubSample = 1;
		1279
		1280	// drop some chroma lines if the user wants it
		1281	c->vChrDrop = (flags & SWS_SRC_V_CHR_DROP_MASK) >>
		1282	SWS_SRC_V_CHR_DROP_SHIFT;
		1283	c->chrSrcVSubSample += c->vChrDrop;
		1284
		1285	/* drop every other pixel for chroma calculation unless user
		1286	* wants full chroma */
		1287	if (isAnyRGB(srcFormat) && !(flags & SWS_FULL_CHR_H_INP) &&
		1288	srcFormat != AV_PIX_FMT_RGB8 && srcFormat != AV_PIX_FMT_BGR8 &&
		1289	srcFormat != AV_PIX_FMT_RGB4 && srcFormat != AV_PIX_FMT_BGR4 &&
		1290	srcFormat != AV_PIX_FMT_RGB4_BYTE && srcFormat != AV_PIX_FMT_BGR4_BYTE &&
		1291	srcFormat != AV_PIX_FMT_GBRP9BE && srcFormat != AV_PIX_FMT_GBRP9LE &&
		1292	srcFormat != AV_PIX_FMT_GBRP10BE && srcFormat != AV_PIX_FMT_GBRP10LE &&
		1293	srcFormat != AV_PIX_FMT_GBRP12BE && srcFormat != AV_PIX_FMT_GBRP12LE &&
		1294	srcFormat != AV_PIX_FMT_GBRP14BE && srcFormat != AV_PIX_FMT_GBRP14LE &&
		1295	srcFormat != AV_PIX_FMT_GBRP16BE && srcFormat != AV_PIX_FMT_GBRP16LE &&
		1296	((dstW >> c->chrDstHSubSample) <= (srcW >> 1) \|\|
		1297	(flags & SWS_FAST_BILINEAR)))
		1298	c->chrSrcHSubSample = 1;
		1299
		1300	// Note the FF_CEIL_RSHIFT is so that we always round toward +inf.
		1301	c->chrSrcW = FF_CEIL_RSHIFT(srcW, c->chrSrcHSubSample);
		1302	c->chrSrcH = FF_CEIL_RSHIFT(srcH, c->chrSrcVSubSample);
		1303	c->chrDstW = FF_CEIL_RSHIFT(dstW, c->chrDstHSubSample);
		1304	c->chrDstH = FF_CEIL_RSHIFT(dstH, c->chrDstVSubSample);
		1305
		1306	FF_ALLOC_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW2+78, 16) 2, fail);
		1307
		1308	/* unscaled special cases */
		1309	if (unscaled && !usesHFilter && !usesVFilter &&
		1310	(c->srcRange == c->dstRange \|\| isAnyRGB(dstFormat))) {
		1311	ff_get_unscaled_swscale(c);
		1312
		1313	if (c->swscale) {
		1314	if (flags & SWS_PRINT_INFO)
		1315	av_log(c, AV_LOG_INFO,
		1316	"using unscaled %s -> %s special converter\n",
		1317	av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
		1318	return 0;
		1319	}
		1320	}
		1321
		1322	c->srcBpc = 1 + desc_src->comp[0].depth_minus1;
		1323	if (c->srcBpc < 8)
		1324	c->srcBpc = 8;
		1325	c->dstBpc = 1 + desc_dst->comp[0].depth_minus1;
		1326	if (c->dstBpc < 8)
		1327	c->dstBpc = 8;
		1328	if (isAnyRGB(srcFormat) \|\| srcFormat == AV_PIX_FMT_PAL8)
		1329	c->srcBpc = 16;
		1330	if (c->dstBpc == 16)
		1331	dst_stride <<= 1;
		1332
		1333	if (INLINE_MMXEXT(cpu_flags) && c->srcBpc == 8 && c->dstBpc <= 14) {
		1334	c->canMMXEXTBeUsed = (dstW >= srcW && (dstW & 31) == 0 &&
		1335	(srcW & 15) == 0) ? 1 : 0;
		1336	if (!c->canMMXEXTBeUsed && dstW >= srcW && (srcW & 15) == 0
		1337
		1338	&& (flags & SWS_FAST_BILINEAR)) {
		1339	if (flags & SWS_PRINT_INFO)
		1340	av_log(c, AV_LOG_INFO,
		1341	"output width is not a multiple of 32 -> no MMXEXT scaler\n");
		1342	}
		1343	if (usesHFilter \|\| isNBPS(c->srcFormat) \|\| is16BPS(c->srcFormat) \|\| isAnyRGB(c->srcFormat))
		1344	c->canMMXEXTBeUsed = 0;
		1345	} else
		1346	c->canMMXEXTBeUsed = 0;
		1347
		1348	c->chrXInc = (((int64_t)c->chrSrcW << 16) + (c->chrDstW >> 1)) / c->chrDstW;
		1349	c->chrYInc = (((int64_t)c->chrSrcH << 16) + (c->chrDstH >> 1)) / c->chrDstH;
		1350
		1351	/* Match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src
		1352	* to pixel n-2 of dst, but only for the FAST_BILINEAR mode otherwise do
		1353	* correct scaling.
		1354	* n-2 is the last chrominance sample available.
		1355	* This is not perfect, but no one should notice the difference, the more
		1356	* correct variant would be like the vertical one, but that would require
		1357	* some special code for the first and last pixel */
		1358	if (flags & SWS_FAST_BILINEAR) {
		1359	if (c->canMMXEXTBeUsed) {
		1360	c->lumXInc += 20;
		1361	c->chrXInc += 20;
		1362	}
		1363	// we don't use the x86 asm scaler if MMX is available
		1364	else if (INLINE_MMX(cpu_flags) && c->dstBpc <= 14) {
		1365	c->lumXInc = ((int64_t)(srcW - 2) << 16) / (dstW - 2) - 20;
		1366	c->chrXInc = ((int64_t)(c->chrSrcW - 2) << 16) / (c->chrDstW - 2) - 20;
		1367	}
		1368	}
		1369
		1370	#define USE_MMAP (HAVE_MMAP && HAVE_MPROTECT && defined MAP_ANONYMOUS)
		1371
		1372	/* precalculate horizontal scaler filter coefficients */
		1373	{
		1374	#if HAVE_MMXEXT_INLINE
		1375	// can't downscale !!!
		1376	if (c->canMMXEXTBeUsed && (flags & SWS_FAST_BILINEAR)) {
		1377	c->lumMmxextFilterCodeSize = init_hscaler_mmxext(dstW, c->lumXInc, NULL,
		1378	NULL, NULL, 8);
		1379	c->chrMmxextFilterCodeSize = init_hscaler_mmxext(c->chrDstW, c->chrXInc,
		1380	NULL, NULL, NULL, 4);
		1381
		1382	#if USE_MMAP
		1383	c->lumMmxextFilterCode = mmap(NULL, c->lumMmxextFilterCodeSize,
		1384	PROT_READ \| PROT_WRITE,
		1385	MAP_PRIVATE \| MAP_ANONYMOUS,
		1386	-1, 0);
		1387	c->chrMmxextFilterCode = mmap(NULL, c->chrMmxextFilterCodeSize,
		1388	PROT_READ \| PROT_WRITE,
		1389	MAP_PRIVATE \| MAP_ANONYMOUS,
		1390	-1, 0);
		1391	#elif HAVE_VIRTUALALLOC
		1392	c->lumMmxextFilterCode = VirtualAlloc(NULL,
		1393	c->lumMmxextFilterCodeSize,
		1394	MEM_COMMIT,
		1395	PAGE_EXECUTE_READWRITE);
		1396	c->chrMmxextFilterCode = VirtualAlloc(NULL,
		1397	c->chrMmxextFilterCodeSize,
		1398	MEM_COMMIT,
		1399	PAGE_EXECUTE_READWRITE);
		1400	#else
		1401	c->lumMmxextFilterCode = av_malloc(c->lumMmxextFilterCodeSize);
		1402	c->chrMmxextFilterCode = av_malloc(c->chrMmxextFilterCodeSize);
		1403	#endif
		1404
		1405	#ifdef MAP_ANONYMOUS
		1406	if (c->lumMmxextFilterCode == MAP_FAILED \|\| c->chrMmxextFilterCode == MAP_FAILED)
		1407	#else
		1408	if (!c->lumMmxextFilterCode \|\| !c->chrMmxextFilterCode)
		1409	#endif
		1410	{
		1411	av_log(c, AV_LOG_ERROR, "Failed to allocate MMX2FilterCode\n");
		1412	return AVERROR(ENOMEM);
		1413	}
		1414
		1415	FF_ALLOCZ_OR_GOTO(c, c->hLumFilter, (dstW / 8 + 8) * sizeof(int16_t), fail);
		1416	FF_ALLOCZ_OR_GOTO(c, c->hChrFilter, (c->chrDstW / 4 + 8) * sizeof(int16_t), fail);
		1417	FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW / 2 / 8 + 8) * sizeof(int32_t), fail);
		1418	FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW / 2 / 4 + 8) * sizeof(int32_t), fail);
		1419
		1420	init_hscaler_mmxext( dstW, c->lumXInc, c->lumMmxextFilterCode,
		1421	c->hLumFilter, (uint32_t*)c->hLumFilterPos, 8);
		1422	init_hscaler_mmxext(c->chrDstW, c->chrXInc, c->chrMmxextFilterCode,
		1423	c->hChrFilter, (uint32_t*)c->hChrFilterPos, 4);
		1424
		1425	#if USE_MMAP
		1426	if ( mprotect(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize, PROT_EXEC \| PROT_READ) == -1
		1427	\|\| mprotect(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize, PROT_EXEC \| PROT_READ) == -1) {
		1428	av_log(c, AV_LOG_ERROR, "mprotect failed, cannot use fast bilinear scaler\n");
		1429	goto fail;
		1430	}
		1431	#endif
		1432	} else
		1433	#endif /* HAVE_MMXEXT_INLINE */
		1434	{
		1435	const int filterAlign = X86_MMX(cpu_flags) ? 4 :
		1436	PPC_ALTIVEC(cpu_flags) ? 8 : 1;
		1437
		1438	if (initFilter(&c->hLumFilter, &c->hLumFilterPos,
		1439	&c->hLumFilterSize, c->lumXInc,
		1440	srcW, dstW, filterAlign, 1 << 14,
		1441	(flags & SWS_BICUBLIN) ? (flags \| SWS_BICUBIC) : flags,
		1442	cpu_flags, srcFilter->lumH, dstFilter->lumH,
		1443	c->param,
		1444	get_local_pos(c, 0, 0, 0),
		1445	get_local_pos(c, 0, 0, 0)) < 0)
		1446	goto fail;
		1447	if (initFilter(&c->hChrFilter, &c->hChrFilterPos,
		1448	&c->hChrFilterSize, c->chrXInc,
		1449	c->chrSrcW, c->chrDstW, filterAlign, 1 << 14,
		1450	(flags & SWS_BICUBLIN) ? (flags \| SWS_BILINEAR) : flags,
		1451	cpu_flags, srcFilter->chrH, dstFilter->chrH,
		1452	c->param,
		1453	get_local_pos(c, c->chrSrcHSubSample, c->src_h_chr_pos, 0),
		1454	get_local_pos(c, c->chrDstHSubSample, c->dst_h_chr_pos, 0)) < 0)
		1455	goto fail;
		1456	}
		1457	} // initialize horizontal stuff
		1458
		1459	/* precalculate vertical scaler filter coefficients */
		1460	{
		1461	const int filterAlign = X86_MMX(cpu_flags) ? 2 :
		1462	PPC_ALTIVEC(cpu_flags) ? 8 : 1;
		1463
		1464	if (initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize,
		1465	c->lumYInc, srcH, dstH, filterAlign, (1 << 12),
		1466	(flags & SWS_BICUBLIN) ? (flags \| SWS_BICUBIC) : flags,
		1467	cpu_flags, srcFilter->lumV, dstFilter->lumV,
		1468	c->param,
		1469	get_local_pos(c, 0, 0, 1),
		1470	get_local_pos(c, 0, 0, 1)) < 0)
		1471	goto fail;
		1472	if (initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize,
		1473	c->chrYInc, c->chrSrcH, c->chrDstH,
		1474	filterAlign, (1 << 12),
		1475	(flags & SWS_BICUBLIN) ? (flags \| SWS_BILINEAR) : flags,
		1476	cpu_flags, srcFilter->chrV, dstFilter->chrV,
		1477	c->param,
		1478	get_local_pos(c, c->chrSrcVSubSample, c->src_v_chr_pos, 1),
		1479	get_local_pos(c, c->chrDstVSubSample, c->dst_v_chr_pos, 1)) < 0)
		1480
		1481	goto fail;
		1482
		1483	#if HAVE_ALTIVEC
		1484	FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof(vector signed short) * c->vLumFilterSize * c->dstH, fail);
		1485	FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof(vector signed short) * c->vChrFilterSize * c->chrDstH, fail);
		1486
		1487	for (i = 0; i < c->vLumFilterSize * c->dstH; i++) {
		1488	int j;
		1489	short p = (short )&c->vYCoeffsBank[i];
		1490	for (j = 0; j < 8; j++)
		1491	p[j] = c->vLumFilter[i];
		1492	}
		1493
		1494	for (i = 0; i < c->vChrFilterSize * c->chrDstH; i++) {
		1495	int j;
		1496	short p = (short )&c->vCCoeffsBank[i];
		1497	for (j = 0; j < 8; j++)
		1498	p[j] = c->vChrFilter[i];
		1499	}
		1500	#endif
		1501	}
		1502
		1503	// calculate buffer sizes so that they won't run out while handling these damn slices
		1504	c->vLumBufSize = c->vLumFilterSize;
		1505	c->vChrBufSize = c->vChrFilterSize;
		1506	for (i = 0; i < dstH; i++) {
		1507	int chrI = (int64_t)i * c->chrDstH / dstH;
		1508	int nextSlice = FFMAX(c->vLumFilterPos[i] + c->vLumFilterSize - 1,
		1509	((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)
		1510	<< c->chrSrcVSubSample));
		1511
		1512	nextSlice >>= c->chrSrcVSubSample;
		1513	nextSlice <<= c->chrSrcVSubSample;
		1514	if (c->vLumFilterPos[i] + c->vLumBufSize < nextSlice)
		1515	c->vLumBufSize = nextSlice - c->vLumFilterPos[i];
		1516	if (c->vChrFilterPos[chrI] + c->vChrBufSize <
		1517	(nextSlice >> c->chrSrcVSubSample))
		1518	c->vChrBufSize = (nextSlice >> c->chrSrcVSubSample) -
		1519	c->vChrFilterPos[chrI];
		1520	}
		1521
		1522	for (i = 0; i < 4; i++)
		1523	FF_ALLOCZ_OR_GOTO(c, c->dither_error[i], (c->dstW+2) * sizeof(int), fail);
		1524
		1525	/* Allocate pixbufs (we use dynamic allocation because otherwise we would
		1526	* need to allocate several megabytes to handle all possible cases) */
		1527	FF_ALLOC_OR_GOTO(c, c->lumPixBuf, c->vLumBufSize * 3 * sizeof(int16_t *), fail);
		1528	FF_ALLOC_OR_GOTO(c, c->chrUPixBuf, c->vChrBufSize * 3 * sizeof(int16_t *), fail);
		1529	FF_ALLOC_OR_GOTO(c, c->chrVPixBuf, c->vChrBufSize * 3 * sizeof(int16_t *), fail);
		1530	if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))
		1531	FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize * 3 * sizeof(int16_t *), fail);
		1532	/* Note we need at least one pixel more at the end because of the MMX code
		1533	* (just in case someone wants to replace the 4000/8000). */
		1534	/* align at 16 bytes for AltiVec */
		1535	for (i = 0; i < c->vLumBufSize; i++) {
		1536	FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i + c->vLumBufSize],
		1537	dst_stride + 16, fail);
		1538	c->lumPixBuf[i] = c->lumPixBuf[i + c->vLumBufSize];
		1539	}
		1540	// 64 / c->scalingBpp is the same as 16 / sizeof(scaling_intermediate)
		1541	c->uv_off = (dst_stride>>1) + 64 / (c->dstBpc &~ 7);
		1542	c->uv_offx2 = dst_stride + 16;
		1543	for (i = 0; i < c->vChrBufSize; i++) {
		1544	FF_ALLOC_OR_GOTO(c, c->chrUPixBuf[i + c->vChrBufSize],
		1545	dst_stride * 2 + 32, fail);
		1546	c->chrUPixBuf[i] = c->chrUPixBuf[i + c->vChrBufSize];
		1547	c->chrVPixBuf[i] = c->chrVPixBuf[i + c->vChrBufSize]
		1548	= c->chrUPixBuf[i] + (dst_stride >> 1) + 8;
		1549	}
		1550	if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)
		1551	for (i = 0; i < c->vLumBufSize; i++) {
		1552	FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i + c->vLumBufSize],
		1553	dst_stride + 16, fail);
		1554	c->alpPixBuf[i] = c->alpPixBuf[i + c->vLumBufSize];
		1555	}
		1556
		1557	// try to avoid drawing green stuff between the right end and the stride end
		1558	for (i = 0; i < c->vChrBufSize; i++)
		1559	if(desc_dst->comp[0].depth_minus1 == 15){
		1560	av_assert0(c->dstBpc > 14);
		1561	for(j=0; j
		1562	((int32_t*)(c->chrUPixBuf[i]))[j] = 1<<18;
		1563	} else
		1564	for(j=0; j
		1565	((int16_t*)(c->chrUPixBuf[i]))[j] = 1<<14;
		1566
		1567	av_assert0(c->chrDstH <= dstH);
		1568
		1569	if (flags & SWS_PRINT_INFO) {
		1570	const char scaler, cpucaps;
		1571	if (flags & SWS_FAST_BILINEAR)
		1572	scaler = "FAST_BILINEAR scaler";
		1573	else if (flags & SWS_BILINEAR)
		1574	scaler = "BILINEAR scaler";
		1575	else if (flags & SWS_BICUBIC)
		1576	scaler = "BICUBIC scaler";
		1577	else if (flags & SWS_X)
		1578	scaler = "Experimental scaler";
		1579	else if (flags & SWS_POINT)
		1580	scaler = "Nearest Neighbor / POINT scaler";
		1581	else if (flags & SWS_AREA)
		1582	scaler = "Area Averaging scaler";
		1583	else if (flags & SWS_BICUBLIN)
		1584	scaler = "luma BICUBIC / chroma BILINEAR scaler";
		1585	else if (flags & SWS_GAUSS)
		1586	scaler = "Gaussian scaler";
		1587	else if (flags & SWS_SINC)
		1588	scaler = "Sinc scaler";
		1589	else if (flags & SWS_LANCZOS)
		1590	scaler = "Lanczos scaler";
		1591	else if (flags & SWS_SPLINE)
		1592	scaler = "Bicubic spline scaler";
		1593	else
		1594	scaler = "ehh flags invalid?!";
		1595
		1596	av_log(c, AV_LOG_INFO, "%s, from %s to %s%s ",
		1597	scaler,
		1598	av_get_pix_fmt_name(srcFormat),
		1599	#ifdef DITHER1XBPP
		1600	dstFormat == AV_PIX_FMT_BGR555 \|\| dstFormat == AV_PIX_FMT_BGR565 \|\|
		1601	dstFormat == AV_PIX_FMT_RGB444BE \|\| dstFormat == AV_PIX_FMT_RGB444LE \|\|
		1602	dstFormat == AV_PIX_FMT_BGR444BE \|\| dstFormat == AV_PIX_FMT_BGR444LE ?
		1603	"dithered " : "",
		1604	#else
		1605	"",
		1606	#endif
		1607	av_get_pix_fmt_name(dstFormat));
		1608
		1609	if (INLINE_MMXEXT(cpu_flags))
		1610	cpucaps = "MMXEXT";
		1611	else if (INLINE_AMD3DNOW(cpu_flags))
		1612	cpucaps = "3DNOW";
		1613	else if (INLINE_MMX(cpu_flags))
		1614	cpucaps = "MMX";
		1615	else if (PPC_ALTIVEC(cpu_flags))
		1616	cpucaps = "AltiVec";
		1617	else
		1618	cpucaps = "C";
		1619
		1620	av_log(c, AV_LOG_INFO, "using %s\n", cpucaps);
		1621
		1622	av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
		1623	av_log(c, AV_LOG_DEBUG,
		1624	"lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
		1625	c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
		1626	av_log(c, AV_LOG_DEBUG,
		1627	"chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
		1628	c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH,
		1629	c->chrXInc, c->chrYInc);
		1630	}
		1631
		1632	c->swscale = ff_getSwsFunc(c);
		1633	return 0;
		1634	fail: // FIXME replace things by appropriate error codes
		1635	return -1;
		1636	}
		1637
		1638	#if FF_API_SWS_GETCONTEXT
		1639	SwsContext *sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat,
		1640	int dstW, int dstH, enum AVPixelFormat dstFormat,
		1641	int flags, SwsFilter *srcFilter,
		1642	SwsFilter dstFilter, const double param)
		1643	{
		1644	SwsContext *c;
		1645
		1646	if (!(c = sws_alloc_context()))
		1647	return NULL;
		1648
		1649	c->flags = flags;
		1650	c->srcW = srcW;
		1651	c->srcH = srcH;
		1652	c->dstW = dstW;
		1653	c->dstH = dstH;
		1654	c->srcFormat = srcFormat;
		1655	c->dstFormat = dstFormat;
		1656
		1657	if (param) {
		1658	c->param[0] = param[0];
		1659	c->param[1] = param[1];
		1660	}
		1661
		1662	if (sws_init_context(c, srcFilter, dstFilter) < 0) {
		1663	sws_freeContext(c);
		1664	return NULL;
		1665	}
		1666
		1667	return c;
		1668	}
		1669	#endif
		1670
		1671	SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
		1672	float lumaSharpen, float chromaSharpen,
		1673	float chromaHShift, float chromaVShift,
		1674	int verbose)
		1675	{
		1676	SwsFilter *filter = av_malloc(sizeof(SwsFilter));
		1677	if (!filter)
		1678	return NULL;
		1679
		1680	if (lumaGBlur != 0.0) {
		1681	filter->lumH = sws_getGaussianVec(lumaGBlur, 3.0);
		1682	filter->lumV = sws_getGaussianVec(lumaGBlur, 3.0);
		1683	} else {
		1684	filter->lumH = sws_getIdentityVec();
		1685	filter->lumV = sws_getIdentityVec();
		1686	}
		1687
		1688	if (chromaGBlur != 0.0) {
		1689	filter->chrH = sws_getGaussianVec(chromaGBlur, 3.0);
		1690	filter->chrV = sws_getGaussianVec(chromaGBlur, 3.0);
		1691	} else {
		1692	filter->chrH = sws_getIdentityVec();
		1693	filter->chrV = sws_getIdentityVec();
		1694	}
		1695
		1696	if (chromaSharpen != 0.0) {
		1697	SwsVector *id = sws_getIdentityVec();
		1698	sws_scaleVec(filter->chrH, -chromaSharpen);
		1699	sws_scaleVec(filter->chrV, -chromaSharpen);
		1700	sws_addVec(filter->chrH, id);
		1701	sws_addVec(filter->chrV, id);
		1702	sws_freeVec(id);
		1703	}
		1704
		1705	if (lumaSharpen != 0.0) {
		1706	SwsVector *id = sws_getIdentityVec();
		1707	sws_scaleVec(filter->lumH, -lumaSharpen);
		1708	sws_scaleVec(filter->lumV, -lumaSharpen);
		1709	sws_addVec(filter->lumH, id);
		1710	sws_addVec(filter->lumV, id);
		1711	sws_freeVec(id);
		1712	}
		1713
		1714	if (chromaHShift != 0.0)
		1715	sws_shiftVec(filter->chrH, (int)(chromaHShift + 0.5));
		1716
		1717	if (chromaVShift != 0.0)
		1718	sws_shiftVec(filter->chrV, (int)(chromaVShift + 0.5));
		1719
		1720	sws_normalizeVec(filter->chrH, 1.0);
		1721	sws_normalizeVec(filter->chrV, 1.0);
		1722	sws_normalizeVec(filter->lumH, 1.0);
		1723	sws_normalizeVec(filter->lumV, 1.0);
		1724
		1725	if (verbose)
		1726	sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
		1727	if (verbose)
		1728	sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
		1729
		1730	return filter;
		1731	}
		1732
		1733	SwsVector *sws_allocVec(int length)
		1734	{
		1735	SwsVector *vec;
		1736
		1737	if(length <= 0 \|\| length > INT_MAX/ sizeof(double))
		1738	return NULL;
		1739
		1740	vec = av_malloc(sizeof(SwsVector));
		1741	if (!vec)
		1742	return NULL;
		1743	vec->length = length;
		1744	vec->coeff = av_malloc(sizeof(double) * length);
		1745	if (!vec->coeff)
		1746	av_freep(&vec);
		1747	return vec;
		1748	}
		1749
		1750	SwsVector *sws_getGaussianVec(double variance, double quality)
		1751	{
		1752	const int length = (int)(variance * quality + 0.5) \| 1;
		1753	int i;
		1754	double middle = (length - 1) * 0.5;
		1755	SwsVector *vec;
		1756
		1757	if(variance < 0 \|\| quality < 0)
		1758	return NULL;
		1759
		1760	vec = sws_allocVec(length);
		1761
		1762	if (!vec)
		1763	return NULL;
		1764
		1765	for (i = 0; i < length; i++) {
		1766	double dist = i - middle;
		1767	vec->coeff[i] = exp(-dist * dist / (2 * variance * variance)) /
		1768	sqrt(2 * variance * M_PI);
		1769	}
		1770
		1771	sws_normalizeVec(vec, 1.0);
		1772
		1773	return vec;
		1774	}
		1775
		1776	SwsVector *sws_getConstVec(double c, int length)
		1777	{
		1778	int i;
		1779	SwsVector *vec = sws_allocVec(length);
		1780
		1781	if (!vec)
		1782	return NULL;
		1783
		1784	for (i = 0; i < length; i++)
		1785	vec->coeff[i] = c;
		1786
		1787	return vec;
		1788	}
		1789
		1790	SwsVector *sws_getIdentityVec(void)
		1791	{
		1792	return sws_getConstVec(1.0, 1);
		1793	}
		1794
		1795	static double sws_dcVec(SwsVector *a)
		1796	{
		1797	int i;
		1798	double sum = 0;
		1799
		1800	for (i = 0; i < a->length; i++)
		1801	sum += a->coeff[i];
		1802
		1803	return sum;
		1804	}
		1805
		1806	void sws_scaleVec(SwsVector *a, double scalar)
		1807	{
		1808	int i;
		1809
		1810	for (i = 0; i < a->length; i++)
		1811	a->coeff[i] *= scalar;
		1812	}
		1813
		1814	void sws_normalizeVec(SwsVector *a, double height)
		1815	{
		1816	sws_scaleVec(a, height / sws_dcVec(a));
		1817	}
		1818
		1819	static SwsVector sws_getConvVec(SwsVector a, SwsVector *b)
		1820	{
		1821	int length = a->length + b->length - 1;
		1822	int i, j;
		1823	SwsVector *vec = sws_getConstVec(0.0, length);
		1824
		1825	if (!vec)
		1826	return NULL;
		1827
		1828	for (i = 0; i < a->length; i++) {
		1829	for (j = 0; j < b->length; j++) {
		1830	vec->coeff[i + j] += a->coeff[i] * b->coeff[j];
		1831	}
		1832	}
		1833
		1834	return vec;
		1835	}
		1836
		1837	static SwsVector sws_sumVec(SwsVector a, SwsVector *b)
		1838	{
		1839	int length = FFMAX(a->length, b->length);
		1840	int i;
		1841	SwsVector *vec = sws_getConstVec(0.0, length);
		1842
		1843	if (!vec)
		1844	return NULL;
		1845
		1846	for (i = 0; i < a->length; i++)
		1847	vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
		1848	for (i = 0; i < b->length; i++)
		1849	vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] += b->coeff[i];
		1850
		1851	return vec;
		1852	}
		1853
		1854	static SwsVector sws_diffVec(SwsVector a, SwsVector *b)
		1855	{
		1856	int length = FFMAX(a->length, b->length);
		1857	int i;
		1858	SwsVector *vec = sws_getConstVec(0.0, length);
		1859
		1860	if (!vec)
		1861	return NULL;
		1862
		1863	for (i = 0; i < a->length; i++)
		1864	vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i];
		1865	for (i = 0; i < b->length; i++)
		1866	vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] -= b->coeff[i];
		1867
		1868	return vec;
		1869	}
		1870
		1871	/* shift left / or right if "shift" is negative */
		1872	static SwsVector sws_getShiftedVec(SwsVector a, int shift)
		1873	{
		1874	int length = a->length + FFABS(shift) * 2;
		1875	int i;
		1876	SwsVector *vec = sws_getConstVec(0.0, length);
		1877
		1878	if (!vec)
		1879	return NULL;
		1880
		1881	for (i = 0; i < a->length; i++) {
		1882	vec->coeff[i + (length - 1) / 2 -
		1883	(a->length - 1) / 2 - shift] = a->coeff[i];
		1884	}
		1885
		1886	return vec;
		1887	}
		1888
		1889	void sws_shiftVec(SwsVector *a, int shift)
		1890	{
		1891	SwsVector *shifted = sws_getShiftedVec(a, shift);
		1892	av_free(a->coeff);
		1893	a->coeff = shifted->coeff;
		1894	a->length = shifted->length;
		1895	av_free(shifted);
		1896	}
		1897
		1898	void sws_addVec(SwsVector a, SwsVector b)
		1899	{
		1900	SwsVector *sum = sws_sumVec(a, b);
		1901	av_free(a->coeff);
		1902	a->coeff = sum->coeff;
		1903	a->length = sum->length;
		1904	av_free(sum);
		1905	}
		1906
		1907	void sws_subVec(SwsVector a, SwsVector b)
		1908	{
		1909	SwsVector *diff = sws_diffVec(a, b);
		1910	av_free(a->coeff);
		1911	a->coeff = diff->coeff;
		1912	a->length = diff->length;
		1913	av_free(diff);
		1914	}
		1915
		1916	void sws_convVec(SwsVector a, SwsVector b)
		1917	{
		1918	SwsVector *conv = sws_getConvVec(a, b);
		1919	av_free(a->coeff);
		1920	a->coeff = conv->coeff;
		1921	a->length = conv->length;
		1922	av_free(conv);
		1923	}
		1924
		1925	SwsVector sws_cloneVec(SwsVector a)
		1926	{
		1927	SwsVector *vec = sws_allocVec(a->length);
		1928
		1929	if (!vec)
		1930	return NULL;
		1931
		1932	memcpy(vec->coeff, a->coeff, a->length * sizeof(*a->coeff));
		1933
		1934	return vec;
		1935	}
		1936
		1937	void sws_printVec2(SwsVector a, AVClass log_ctx, int log_level)
		1938	{
		1939	int i;
		1940	double max = 0;
		1941	double min = 0;
		1942	double range;
		1943
		1944	for (i = 0; i < a->length; i++)
		1945	if (a->coeff[i] > max)
		1946	max = a->coeff[i];
		1947
		1948	for (i = 0; i < a->length; i++)
		1949	if (a->coeff[i] < min)
		1950	min = a->coeff[i];
		1951
		1952	range = max - min;
		1953
		1954	for (i = 0; i < a->length; i++) {
		1955	int x = (int)((a->coeff[i] - min) * 60.0 / range + 0.5);
		1956	av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
		1957	for (; x > 0; x--)
		1958	av_log(log_ctx, log_level, " ");
		1959	av_log(log_ctx, log_level, "\|\n");
		1960	}
		1961	}
		1962
		1963	void sws_freeVec(SwsVector *a)
		1964	{
		1965	if (!a)
		1966	return;
		1967	av_freep(&a->coeff);
		1968	a->length = 0;
		1969	av_free(a);
		1970	}
		1971
		1972	void sws_freeFilter(SwsFilter *filter)
		1973	{
		1974	if (!filter)
		1975	return;
		1976
		1977	sws_freeVec(filter->lumH);
		1978	sws_freeVec(filter->lumV);
		1979	sws_freeVec(filter->chrH);
		1980	sws_freeVec(filter->chrV);
		1981	av_free(filter);
		1982	}
		1983
		1984	void sws_freeContext(SwsContext *c)
		1985	{
		1986	int i;
		1987	if (!c)
		1988	return;
		1989
		1990	if (c->lumPixBuf) {
		1991	for (i = 0; i < c->vLumBufSize; i++)
		1992	av_freep(&c->lumPixBuf[i]);
		1993	av_freep(&c->lumPixBuf);
		1994	}
		1995
		1996	if (c->chrUPixBuf) {
		1997	for (i = 0; i < c->vChrBufSize; i++)
		1998	av_freep(&c->chrUPixBuf[i]);
		1999	av_freep(&c->chrUPixBuf);
		2000	av_freep(&c->chrVPixBuf);
		2001	}
		2002
		2003	if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {
		2004	for (i = 0; i < c->vLumBufSize; i++)
		2005	av_freep(&c->alpPixBuf[i]);
		2006	av_freep(&c->alpPixBuf);
		2007	}
		2008
		2009	for (i = 0; i < 4; i++)
		2010	av_freep(&c->dither_error[i]);
		2011
		2012	av_freep(&c->vLumFilter);
		2013	av_freep(&c->vChrFilter);
		2014	av_freep(&c->hLumFilter);
		2015	av_freep(&c->hChrFilter);
		2016	#if HAVE_ALTIVEC
		2017	av_freep(&c->vYCoeffsBank);
		2018	av_freep(&c->vCCoeffsBank);
		2019	#endif
		2020
		2021	av_freep(&c->vLumFilterPos);
		2022	av_freep(&c->vChrFilterPos);
		2023	av_freep(&c->hLumFilterPos);
		2024	av_freep(&c->hChrFilterPos);
		2025
		2026	#if HAVE_MMX_INLINE
		2027	#if USE_MMAP
		2028	if (c->lumMmxextFilterCode)
		2029	munmap(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize);
		2030	if (c->chrMmxextFilterCode)
		2031	munmap(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize);
		2032	#elif HAVE_VIRTUALALLOC
		2033	if (c->lumMmxextFilterCode)
		2034	VirtualFree(c->lumMmxextFilterCode, 0, MEM_RELEASE);
		2035	if (c->chrMmxextFilterCode)
		2036	VirtualFree(c->chrMmxextFilterCode, 0, MEM_RELEASE);
		2037	#else
		2038	av_free(c->lumMmxextFilterCode);
		2039	av_free(c->chrMmxextFilterCode);
		2040	#endif
		2041	c->lumMmxextFilterCode = NULL;
		2042	c->chrMmxextFilterCode = NULL;
		2043	#endif /* HAVE_MMX_INLINE */
		2044
		2045	av_freep(&c->yuvTable);
		2046	av_freep(&c->formatConvBuffer);
		2047
		2048	av_free(c);
		2049	}
		2050
		2051	struct SwsContext sws_getCachedContext(struct SwsContext context, int srcW,
		2052	int srcH, enum AVPixelFormat srcFormat,
		2053	int dstW, int dstH,
		2054	enum AVPixelFormat dstFormat, int flags,
		2055	SwsFilter *srcFilter,
		2056	SwsFilter *dstFilter,
		2057	const double *param)
		2058	{
		2059	static const double default_param[2] = { SWS_PARAM_DEFAULT,
		2060	SWS_PARAM_DEFAULT };
		2061
		2062	if (!param)
		2063	param = default_param;
		2064
		2065	if (context &&
		2066	(context->srcW != srcW \|\|
		2067	context->srcH != srcH \|\|
		2068	context->srcFormat != srcFormat \|\|
		2069	context->dstW != dstW \|\|
		2070	context->dstH != dstH \|\|
		2071	context->dstFormat != dstFormat \|\|
		2072	context->flags != flags \|\|
		2073	context->param[0] != param[0] \|\|
		2074	context->param[1] != param[1])) {
		2075	sws_freeContext(context);
		2076	context = NULL;
		2077	}
		2078
		2079	if (!context) {
		2080	if (!(context = sws_alloc_context()))
		2081	return NULL;
		2082	context->srcW = srcW;
		2083	context->srcH = srcH;
		2084	context->srcFormat = srcFormat;
		2085	context->dstW = dstW;
		2086	context->dstH = dstH;
		2087	context->dstFormat = dstFormat;
		2088	context->flags = flags;
		2089	context->param[0] = param[0];
		2090	context->param[1] = param[1];
		2091	if (sws_init_context(context, srcFilter, dstFilter) < 0) {
		2092	sws_freeContext(context);
		2093	return NULL;
		2094	}
		2095	}
		2096	return context;
		2097	}

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(root)/contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libswscale/utils.c – Rev 6148