* commit '142e76f1055de5dde44696e71a5f63f2cb11dedf': swscale: fix crash with dithering due incorrect offset calculation. matroskadec: fix stupid typo (!= -> ==) build: remove duplicates from order-only directory prerequisite list build: rework rules for things in the tools dir configure: fix --cpu=host with gcc 4.6 ARM: use const macro to define constant data in asm bitdepth: simplify FUNC/FUNCC macros dsputil: remove ff_emulated_edge_mc macro used in one place 9/10-bit: simplify clipping macros matroskadec: reindent matroskadec: defer parsing of cues element until we seek. lavc: add support for codec-specific defaults. lavc: make avcodec_alloc_context3 officially public. lavc: remove a half-working attempt at different defaults for audio/video codecs. ac3dec: add a drc_scale private option lavf: add avformat_find_stream_info() lavc: introduce avcodec_open2() as a replacement for avcodec_open(). Conflicts: Makefile libavcodec/utils.c libavformat/avformat.h libswscale/swscale_internal.h Merged-by: Michael Niedermayer <michaelni@gmx.at>
		
			
				
	
	
		
			685 lines
		
	
	
		
			31 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			685 lines
		
	
	
		
			31 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
/*
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 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef SWSCALE_SWSCALE_INTERNAL_H
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#define SWSCALE_SWSCALE_INTERNAL_H
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#include "config.h"
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#if HAVE_ALTIVEC_H
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#include <altivec.h>
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#endif
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#include "libavutil/avutil.h"
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#include "libavutil/log.h"
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#include "libavutil/pixfmt.h"
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#define STR(s)         AV_TOSTRING(s) //AV_STRINGIFY is too long
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#define FAST_BGR2YV12 //use 7-bit instead of 15-bit coefficients
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#define MAX_FILTER_SIZE 256
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#define DITHER1XBPP
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#if HAVE_BIGENDIAN
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#define ALT32_CORR (-1)
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#else
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#define ALT32_CORR   1
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#endif
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#if ARCH_X86_64
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#   define APCK_PTR2 8
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#   define APCK_COEF 16
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#   define APCK_SIZE 24
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#else
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#   define APCK_PTR2 4
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#   define APCK_COEF 8
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#   define APCK_SIZE 16
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#endif
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struct SwsContext;
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typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t* src[],
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                       int srcStride[], int srcSliceY, int srcSliceH,
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                       uint8_t* dst[], int dstStride[]);
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/**
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 * Write one line of horizontally scaled Y/U/V/A to planar output
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 * without any additional vertical scaling (or point-scaling).
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 *
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 * @param c       SWS scaling context
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 * @param lumSrc  scaled luma (Y) source data, 15bit for 8bit output
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 * @param chrUSrc scaled chroma (U) source data, 15bit for 8bit output
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 * @param chrVSrc scaled chroma (V) source data, 15bit for 8bit output
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 * @param alpSrc  scaled alpha (A) source data, 15bit for 8bit output
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 * @param dest    pointer to the 4 output planes (Y/U/V/A)
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 * @param dstW    width of dest[0], dest[3], lumSrc and alpSrc in pixels
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 * @param chrDstW width of dest[1], dest[2], chrUSrc and chrVSrc
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 */
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typedef void (*yuv2planar1_fn) (struct SwsContext *c,
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                                const int16_t *lumSrc, const int16_t *chrUSrc,
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                                const int16_t *chrVSrc, const int16_t *alpSrc,
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                                uint8_t *dest[4], int dstW, int chrDstW);
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/**
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 * Write one line of horizontally scaled Y/U/V/A to planar output
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 * with multi-point vertical scaling between input pixels.
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 *
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 * @param c             SWS scaling context
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 * @param lumFilter     vertical luma/alpha scaling coefficients, 12bit [0,4096]
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 * @param lumSrc        scaled luma (Y) source data, 15bit for 8bit output
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 * @param lumFilterSize number of vertical luma/alpha input lines to scale
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 * @param chrFilter     vertical chroma scaling coefficients, 12bit [0,4096]
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 * @param chrUSrc       scaled chroma (U) source data, 15bit for 8bit output
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 * @param chrVSrc       scaled chroma (V) source data, 15bit for 8bit output
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 * @param chrFilterSize number of vertical chroma input lines to scale
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 * @param alpSrc        scaled alpha (A) source data, 15bit for 8bit output
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 * @param dest          pointer to the 4 output planes (Y/U/V/A)
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 * @param dstW          width of dest[0], dest[3], lumSrc and alpSrc in pixels
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 * @param chrDstW       width of dest[1], dest[2], chrUSrc and chrVSrc
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 */
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typedef void (*yuv2planarX_fn) (struct SwsContext *c, const int16_t *lumFilter,
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                                const int16_t **lumSrc, int lumFilterSize,
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                                const int16_t *chrFilter, const int16_t **chrUSrc,
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                                const int16_t **chrVSrc,  int chrFilterSize,
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                                const int16_t **alpSrc, uint8_t *dest[4],
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                                int dstW, int chrDstW);
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/**
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 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
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 * output without any additional vertical scaling (or point-scaling). Note
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 * that this function may do chroma scaling, see the "uvalpha" argument.
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 *
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 * @param c       SWS scaling context
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 * @param lumSrc  scaled luma (Y) source data, 15bit for 8bit output
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 * @param chrUSrc scaled chroma (U) source data, 15bit for 8bit output
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 * @param chrVSrc scaled chroma (V) source data, 15bit for 8bit output
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 * @param alpSrc  scaled alpha (A) source data, 15bit for 8bit output
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 * @param dest    pointer to the output plane
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 * @param dstW    width of lumSrc and alpSrc in pixels, number of pixels
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 *                to write into dest[]
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 * @param uvalpha chroma scaling coefficient for the second line of chroma
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 *                pixels, either 2048 or 0. If 0, one chroma input is used
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 *                for 2 output pixels (or if the SWS_FLAG_FULL_CHR_INT flag
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 *                is set, it generates 1 output pixel). If 2048, two chroma
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 *                input pixels should be averaged for 2 output pixels (this
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 *                only happens if SWS_FLAG_FULL_CHR_INT is not set)
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 * @param y       vertical line number for this output. This does not need
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 *                to be used to calculate the offset in the destination,
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 *                but can be used to generate comfort noise using dithering
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 *                for some output formats.
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 */
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typedef void (*yuv2packed1_fn) (struct SwsContext *c,  const int16_t *lumSrc,
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                                const int16_t *chrUSrc[2], const int16_t *chrVSrc[2],
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                                const int16_t *alpSrc,  uint8_t *dest,
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                                int dstW, int uvalpha, int y);
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/**
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 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
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 * output by doing bilinear scaling between two input lines.
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 *
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 * @param c       SWS scaling context
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 * @param lumSrc  scaled luma (Y) source data, 15bit for 8bit output
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 * @param chrUSrc scaled chroma (U) source data, 15bit for 8bit output
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 * @param chrVSrc scaled chroma (V) source data, 15bit for 8bit output
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 * @param alpSrc  scaled alpha (A) source data, 15bit for 8bit output
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 * @param dest    pointer to the output plane
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 * @param dstW    width of lumSrc and alpSrc in pixels, number of pixels
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 *                to write into dest[]
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 * @param yalpha  luma/alpha scaling coefficients for the second input line.
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 *                The first line's coefficients can be calculated by using
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 *                4096 - yalpha
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 * @param uvalpha chroma scaling coefficient for the second input line. The
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 *                first line's coefficients can be calculated by using
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 *                4096 - uvalpha
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 * @param y       vertical line number for this output. This does not need
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 *                to be used to calculate the offset in the destination,
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 *                but can be used to generate comfort noise using dithering
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 *                for some output formats.
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 */
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typedef void (*yuv2packed2_fn) (struct SwsContext *c,  const int16_t *lumSrc[2],
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                                const int16_t *chrUSrc[2], const int16_t *chrVSrc[2],
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                                const int16_t *alpSrc[2], uint8_t *dest,
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                                int dstW, int yalpha, int uvalpha, int y);
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/**
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 * Write one line of horizontally scaled Y/U/V/A to packed-pixel YUV/RGB
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 * output by doing multi-point vertical scaling between input pixels.
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 *
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 * @param c             SWS scaling context
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 * @param lumFilter     vertical luma/alpha scaling coefficients, 12bit [0,4096]
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 * @param lumSrc        scaled luma (Y) source data, 15bit for 8bit output
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 * @param lumFilterSize number of vertical luma/alpha input lines to scale
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 * @param chrFilter     vertical chroma scaling coefficients, 12bit [0,4096]
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 * @param chrUSrc       scaled chroma (U) source data, 15bit for 8bit output
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 * @param chrVSrc       scaled chroma (V) source data, 15bit for 8bit output
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 * @param chrFilterSize number of vertical chroma input lines to scale
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 * @param alpSrc        scaled alpha (A) source data, 15bit for 8bit output
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 * @param dest          pointer to the output plane
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 * @param dstW          width of lumSrc and alpSrc in pixels, number of pixels
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 *                      to write into dest[]
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 * @param y             vertical line number for this output. This does not need
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 *                      to be used to calculate the offset in the destination,
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 *                      but can be used to generate comfort noise using dithering
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 *                      or some output formats.
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 */
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typedef void (*yuv2packedX_fn) (struct SwsContext *c, const int16_t *lumFilter,
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                                const int16_t **lumSrc, int lumFilterSize,
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                                const int16_t *chrFilter, const int16_t **chrUSrc,
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                                const int16_t **chrVSrc, int chrFilterSize,
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                                const int16_t **alpSrc, uint8_t *dest,
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                                int dstW, int y);
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/* This struct should be aligned on at least a 32-byte boundary. */
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typedef struct SwsContext {
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    /**
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     * info on struct for av_log
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     */
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    const AVClass *av_class;
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    /**
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     * Note that src, dst, srcStride, dstStride will be copied in the
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     * sws_scale() wrapper so they can be freely modified here.
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     */
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    SwsFunc swScale;
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    int srcW;                     ///< Width  of source      luma/alpha planes.
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    int srcH;                     ///< Height of source      luma/alpha planes.
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    int dstH;                     ///< Height of destination luma/alpha planes.
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    int chrSrcW;                  ///< Width  of source      chroma     planes.
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    int chrSrcH;                  ///< Height of source      chroma     planes.
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    int chrDstW;                  ///< Width  of destination chroma     planes.
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    int chrDstH;                  ///< Height of destination chroma     planes.
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    int lumXInc, chrXInc;
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    int lumYInc, chrYInc;
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    enum PixelFormat dstFormat;   ///< Destination pixel format.
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    enum PixelFormat srcFormat;   ///< Source      pixel format.
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    int dstFormatBpp;             ///< Number of bits per pixel of the destination pixel format.
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    int srcFormatBpp;             ///< Number of bits per pixel of the source      pixel format.
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    int scalingBpp;
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    int chrSrcHSubSample;         ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source      image.
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    int chrSrcVSubSample;         ///< Binary logarithm of vertical   subsampling factor between luma/alpha and chroma planes in source      image.
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    int chrDstHSubSample;         ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
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    int chrDstVSubSample;         ///< Binary logarithm of vertical   subsampling factor between luma/alpha and chroma planes in destination image.
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    int vChrDrop;                 ///< Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
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    int sliceDir;                 ///< Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
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    double param[2];              ///< Input parameters for scaling algorithms that need them.
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    uint32_t pal_yuv[256];
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    uint32_t pal_rgb[256];
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    /**
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     * @name Scaled horizontal lines ring buffer.
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     * The horizontal scaler keeps just enough scaled lines in a ring buffer
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     * so they may be passed to the vertical scaler. The pointers to the
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     * allocated buffers for each line are duplicated in sequence in the ring
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     * buffer to simplify indexing and avoid wrapping around between lines
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     * inside the vertical scaler code. The wrapping is done before the
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     * vertical scaler is called.
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     */
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    //@{
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    int16_t **lumPixBuf;          ///< Ring buffer for scaled horizontal luma   plane lines to be fed to the vertical scaler.
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    int16_t **chrUPixBuf;         ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
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    int16_t **chrVPixBuf;         ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
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    int16_t **alpPixBuf;          ///< Ring buffer for scaled horizontal alpha  plane lines to be fed to the vertical scaler.
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    int       vLumBufSize;        ///< Number of vertical luma/alpha lines allocated in the ring buffer.
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    int       vChrBufSize;        ///< Number of vertical chroma     lines allocated in the ring buffer.
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    int       lastInLumBuf;       ///< Last scaled horizontal luma/alpha line from source in the ring buffer.
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    int       lastInChrBuf;       ///< Last scaled horizontal chroma     line from source in the ring buffer.
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    int       lumBufIndex;        ///< Index in ring buffer of the last scaled horizontal luma/alpha line from source.
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    int       chrBufIndex;        ///< Index in ring buffer of the last scaled horizontal chroma     line from source.
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    //@}
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    uint8_t *formatConvBuffer;
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    /**
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     * @name Horizontal and vertical filters.
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     * To better understand the following fields, here is a pseudo-code of
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     * their usage in filtering a horizontal line:
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     * @code
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     * for (i = 0; i < width; i++) {
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     *     dst[i] = 0;
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     *     for (j = 0; j < filterSize; j++)
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     *         dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ];
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     *     dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point.
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     * }
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     * @endcode
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     */
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    //@{
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    int16_t *hLumFilter;          ///< Array of horizontal filter coefficients for luma/alpha planes.
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    int16_t *hChrFilter;          ///< Array of horizontal filter coefficients for chroma     planes.
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    int16_t *vLumFilter;          ///< Array of vertical   filter coefficients for luma/alpha planes.
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    int16_t *vChrFilter;          ///< Array of vertical   filter coefficients for chroma     planes.
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    int16_t *hLumFilterPos;       ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
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    int16_t *hChrFilterPos;       ///< Array of horizontal filter starting positions for each dst[i] for chroma     planes.
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    int16_t *vLumFilterPos;       ///< Array of vertical   filter starting positions for each dst[i] for luma/alpha planes.
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    int16_t *vChrFilterPos;       ///< Array of vertical   filter starting positions for each dst[i] for chroma     planes.
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    int      hLumFilterSize;      ///< Horizontal filter size for luma/alpha pixels.
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    int      hChrFilterSize;      ///< Horizontal filter size for chroma     pixels.
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    int      vLumFilterSize;      ///< Vertical   filter size for luma/alpha pixels.
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    int      vChrFilterSize;      ///< Vertical   filter size for chroma     pixels.
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    //@}
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    int lumMmx2FilterCodeSize;    ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for luma/alpha planes.
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    int chrMmx2FilterCodeSize;    ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for chroma     planes.
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    uint8_t *lumMmx2FilterCode;   ///< Runtime-generated MMX2 horizontal fast bilinear scaler code for luma/alpha planes.
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    uint8_t *chrMmx2FilterCode;   ///< Runtime-generated MMX2 horizontal fast bilinear scaler code for chroma     planes.
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    int canMMX2BeUsed;
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    int dstY;                     ///< Last destination vertical line output from last slice.
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    int flags;                    ///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
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    void * yuvTable;            // pointer to the yuv->rgb table start so it can be freed()
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    uint8_t * table_rV[256];
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    uint8_t * table_gU[256];
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    int    table_gV[256];
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    uint8_t * table_bU[256];
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    //Colorspace stuff
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    int contrast, brightness, saturation;    // for sws_getColorspaceDetails
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    int srcColorspaceTable[4];
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    int dstColorspaceTable[4];
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    int srcRange;                 ///< 0 = MPG YUV range, 1 = JPG YUV range (source      image).
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    int dstRange;                 ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
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    int yuv2rgb_y_offset;
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    int yuv2rgb_y_coeff;
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    int yuv2rgb_v2r_coeff;
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    int yuv2rgb_v2g_coeff;
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    int yuv2rgb_u2g_coeff;
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    int yuv2rgb_u2b_coeff;
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#define RED_DITHER            "0*8"
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#define GREEN_DITHER          "1*8"
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#define BLUE_DITHER           "2*8"
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#define Y_COEFF               "3*8"
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#define VR_COEFF              "4*8"
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#define UB_COEFF              "5*8"
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#define VG_COEFF              "6*8"
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#define UG_COEFF              "7*8"
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#define Y_OFFSET              "8*8"
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#define U_OFFSET              "9*8"
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#define V_OFFSET              "10*8"
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#define LUM_MMX_FILTER_OFFSET "11*8"
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#define CHR_MMX_FILTER_OFFSET "11*8+4*4*256"
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#define DSTW_OFFSET           "11*8+4*4*256*2" //do not change, it is hardcoded in the ASM
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#define ESP_OFFSET            "11*8+4*4*256*2+8"
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#define VROUNDER_OFFSET       "11*8+4*4*256*2+16"
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#define U_TEMP                "11*8+4*4*256*2+24"
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#define V_TEMP                "11*8+4*4*256*2+32"
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#define Y_TEMP                "11*8+4*4*256*2+40"
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						|
#define ALP_MMX_FILTER_OFFSET "11*8+4*4*256*2+48"
 | 
						|
#define UV_OFF                "11*8+4*4*256*3+48"
 | 
						|
#define UV_OFFx2              "11*8+4*4*256*3+56"
 | 
						|
#define DITHER16              "11*8+4*4*256*3+64"
 | 
						|
#define DITHER32              "11*8+4*4*256*3+80"
 | 
						|
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, redDither);
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, greenDither);
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, blueDither);
 | 
						|
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, yCoeff);
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, vrCoeff);
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, ubCoeff);
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, vgCoeff);
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, ugCoeff);
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, yOffset);
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, uOffset);
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, vOffset);
 | 
						|
    int32_t  lumMmxFilter[4*MAX_FILTER_SIZE];
 | 
						|
    int32_t  chrMmxFilter[4*MAX_FILTER_SIZE];
 | 
						|
    int dstW;                     ///< Width  of destination luma/alpha planes.
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, esp);
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, vRounder);
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, u_temp);
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, v_temp);
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, y_temp);
 | 
						|
    int32_t  alpMmxFilter[4*MAX_FILTER_SIZE];
 | 
						|
    // alignment of these values is not necessary, but merely here
 | 
						|
    // to maintain the same offset across x8632 and x86-64. Once we
 | 
						|
    // use proper offset macros in the asm, they can be removed.
 | 
						|
    DECLARE_ALIGNED(8, ptrdiff_t, uv_off); ///< offset (in pixels) between u and v planes
 | 
						|
    DECLARE_ALIGNED(8, ptrdiff_t, uv_offx2); ///< offset (in bytes) between u and v planes
 | 
						|
    DECLARE_ALIGNED(8, uint16_t, dither16)[8];
 | 
						|
    DECLARE_ALIGNED(8, uint32_t, dither32)[8];
 | 
						|
 | 
						|
    const uint8_t *chrDither8, *lumDither8;
 | 
						|
 | 
						|
#if HAVE_ALTIVEC
 | 
						|
    vector signed short   CY;
 | 
						|
    vector signed short   CRV;
 | 
						|
    vector signed short   CBU;
 | 
						|
    vector signed short   CGU;
 | 
						|
    vector signed short   CGV;
 | 
						|
    vector signed short   OY;
 | 
						|
    vector unsigned short CSHIFT;
 | 
						|
    vector signed short   *vYCoeffsBank, *vCCoeffsBank;
 | 
						|
#endif
 | 
						|
 | 
						|
#if ARCH_BFIN
 | 
						|
    DECLARE_ALIGNED(4, uint32_t, oy);
 | 
						|
    DECLARE_ALIGNED(4, uint32_t, oc);
 | 
						|
    DECLARE_ALIGNED(4, uint32_t, zero);
 | 
						|
    DECLARE_ALIGNED(4, uint32_t, cy);
 | 
						|
    DECLARE_ALIGNED(4, uint32_t, crv);
 | 
						|
    DECLARE_ALIGNED(4, uint32_t, rmask);
 | 
						|
    DECLARE_ALIGNED(4, uint32_t, cbu);
 | 
						|
    DECLARE_ALIGNED(4, uint32_t, bmask);
 | 
						|
    DECLARE_ALIGNED(4, uint32_t, cgu);
 | 
						|
    DECLARE_ALIGNED(4, uint32_t, cgv);
 | 
						|
    DECLARE_ALIGNED(4, uint32_t, gmask);
 | 
						|
#endif
 | 
						|
 | 
						|
#if HAVE_VIS
 | 
						|
    DECLARE_ALIGNED(8, uint64_t, sparc_coeffs)[10];
 | 
						|
#endif
 | 
						|
 | 
						|
    /* function pointers for swScale() */
 | 
						|
    yuv2planar1_fn yuv2yuv1;
 | 
						|
    yuv2planarX_fn yuv2yuvX;
 | 
						|
    yuv2packed1_fn yuv2packed1;
 | 
						|
    yuv2packed2_fn yuv2packed2;
 | 
						|
    yuv2packedX_fn yuv2packedX;
 | 
						|
 | 
						|
    void (*lumToYV12)(uint8_t *dst, const uint8_t *src,
 | 
						|
                      int width, uint32_t *pal); ///< Unscaled conversion of luma plane to YV12 for horizontal scaler.
 | 
						|
    void (*alpToYV12)(uint8_t *dst, const uint8_t *src,
 | 
						|
                      int width, uint32_t *pal); ///< Unscaled conversion of alpha plane to YV12 for horizontal scaler.
 | 
						|
    void (*chrToYV12)(uint8_t *dstU, uint8_t *dstV,
 | 
						|
                      const uint8_t *src1, const uint8_t *src2,
 | 
						|
                      int width, uint32_t *pal); ///< Unscaled conversion of chroma planes to YV12 for horizontal scaler.
 | 
						|
    /**
 | 
						|
     * Scale one horizontal line of input data using a bilinear filter
 | 
						|
     * to produce one line of output data. Compared to SwsContext->hScale(),
 | 
						|
     * please take note of the following caveats when using these:
 | 
						|
     * - Scaling is done using only 7bit instead of 14bit coefficients.
 | 
						|
     * - You can use no more than 5 input pixels to produce 4 output
 | 
						|
     *   pixels. Therefore, this filter should not be used for downscaling
 | 
						|
     *   by more than ~20% in width (because that equals more than 5/4th
 | 
						|
     *   downscaling and thus more than 5 pixels input per 4 pixels output).
 | 
						|
     * - In general, bilinear filters create artifacts during downscaling
 | 
						|
     *   (even when <20%), because one output pixel will span more than one
 | 
						|
     *   input pixel, and thus some pixels will need edges of both neighbor
 | 
						|
     *   pixels to interpolate the output pixel. Since you can use at most
 | 
						|
     *   two input pixels per output pixel in bilinear scaling, this is
 | 
						|
     *   impossible and thus downscaling by any size will create artifacts.
 | 
						|
     * To enable this type of scaling, set SWS_FLAG_FAST_BILINEAR
 | 
						|
     * in SwsContext->flags.
 | 
						|
     */
 | 
						|
    /** @{ */
 | 
						|
    void (*hyscale_fast)(struct SwsContext *c,
 | 
						|
                         int16_t *dst, int dstWidth,
 | 
						|
                         const uint8_t *src, int srcW, int xInc);
 | 
						|
    void (*hcscale_fast)(struct SwsContext *c,
 | 
						|
                         int16_t *dst1, int16_t *dst2, int dstWidth,
 | 
						|
                         const uint8_t *src1, const uint8_t *src2,
 | 
						|
                         int srcW, int xInc);
 | 
						|
    /** @} */
 | 
						|
 | 
						|
    /**
 | 
						|
     * Scale one horizontal line of input data using a filter over the input
 | 
						|
     * lines, to produce one (differently sized) line of output data.
 | 
						|
     *
 | 
						|
     * @param dst        pointer to destination buffer for horizontally scaled
 | 
						|
     *                   data. If the scaling depth (SwsContext->scalingBpp) is
 | 
						|
     *                   8, data will be 15bpp in 16bits (int16_t) width. If
 | 
						|
     *                   scaling depth is 16, data will be 19bpp in 32bpp
 | 
						|
     *                   (int32_t) width.
 | 
						|
     * @param dstW       width of destination image
 | 
						|
     * @param src        pointer to source data to be scaled. If scaling depth
 | 
						|
     *                   is 8, this is 8bpp in 8bpp (uint8_t) width. If scaling
 | 
						|
     *                   depth is 16, this is native depth in 16bbp (uint16_t)
 | 
						|
     *                   width. In other words, for 9-bit YUV input, this is
 | 
						|
     *                   9bpp, for 10-bit YUV input, this is 10bpp, and for
 | 
						|
     *                   16-bit RGB or YUV, this is 16bpp.
 | 
						|
     * @param filter     filter coefficients to be used per output pixel for
 | 
						|
     *                   scaling. This contains 14bpp filtering coefficients.
 | 
						|
     *                   Guaranteed to contain dstW * filterSize entries.
 | 
						|
     * @param filterPos  position of the first input pixel to be used for
 | 
						|
     *                   each output pixel during scaling. Guaranteed to
 | 
						|
     *                   contain dstW entries.
 | 
						|
     * @param filterSize the number of input coefficients to be used (and
 | 
						|
     *                   thus the number of input pixels to be used) for
 | 
						|
     *                   creating a single output pixel. Is aligned to 4
 | 
						|
     *                   (and input coefficients thus padded with zeroes)
 | 
						|
     *                   to simplify creating SIMD code.
 | 
						|
     */
 | 
						|
    void (*hScale)(struct SwsContext *c, int16_t *dst, int dstW, const uint8_t *src,
 | 
						|
                   const int16_t *filter, const int16_t *filterPos,
 | 
						|
                   int filterSize);
 | 
						|
 | 
						|
    void (*hScale16)(int16_t *dst, int dstW, const uint16_t *src, int srcW,
 | 
						|
                   int xInc, const int16_t *filter, const int16_t *filterPos,
 | 
						|
                   long filterSize, int shift);
 | 
						|
 | 
						|
    void (*lumConvertRange)(int16_t *dst, int width); ///< Color range conversion function for luma plane if needed.
 | 
						|
    void (*chrConvertRange)(int16_t *dst1, int16_t *dst2, int width); ///< Color range conversion function for chroma planes if needed.
 | 
						|
 | 
						|
    /**
 | 
						|
     * dst[..] = (src[..] << 8) | src[..];
 | 
						|
     */
 | 
						|
    void (*scale8To16Rv)(uint16_t *dst, const uint8_t *src, int len);
 | 
						|
    /**
 | 
						|
     * dst[..] = src[..] >> 4;
 | 
						|
     */
 | 
						|
    void (*scale19To15Fw)(int16_t *dst, const int32_t *src, int len);
 | 
						|
 | 
						|
    int needs_hcscale; ///< Set if there are chroma planes to be converted.
 | 
						|
 | 
						|
} SwsContext;
 | 
						|
//FIXME check init (where 0)
 | 
						|
 | 
						|
SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c);
 | 
						|
int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
 | 
						|
                             int fullRange, int brightness,
 | 
						|
                             int contrast, int saturation);
 | 
						|
 | 
						|
void ff_yuv2rgb_init_tables_altivec(SwsContext *c, const int inv_table[4],
 | 
						|
                                    int brightness, int contrast, int saturation);
 | 
						|
void updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex,
 | 
						|
                           int lastInLumBuf, int lastInChrBuf);
 | 
						|
 | 
						|
SwsFunc ff_yuv2rgb_init_mmx(SwsContext *c);
 | 
						|
SwsFunc ff_yuv2rgb_init_vis(SwsContext *c);
 | 
						|
SwsFunc ff_yuv2rgb_init_mlib(SwsContext *c);
 | 
						|
SwsFunc ff_yuv2rgb_init_altivec(SwsContext *c);
 | 
						|
SwsFunc ff_yuv2rgb_get_func_ptr_bfin(SwsContext *c);
 | 
						|
void ff_bfin_get_unscaled_swscale(SwsContext *c);
 | 
						|
 | 
						|
#if FF_API_SWS_FORMAT_NAME
 | 
						|
/**
 | 
						|
 * @deprecated Use av_get_pix_fmt_name() instead.
 | 
						|
 */
 | 
						|
attribute_deprecated
 | 
						|
const char *sws_format_name(enum PixelFormat format);
 | 
						|
#endif
 | 
						|
 | 
						|
//FIXME replace this with something faster
 | 
						|
#define is16BPS(x)      (           \
 | 
						|
           (x)==PIX_FMT_GRAY16BE    \
 | 
						|
        || (x)==PIX_FMT_GRAY16LE    \
 | 
						|
        || (x)==PIX_FMT_BGR48BE     \
 | 
						|
        || (x)==PIX_FMT_BGR48LE     \
 | 
						|
        || (x)==PIX_FMT_RGB48BE     \
 | 
						|
        || (x)==PIX_FMT_RGB48LE     \
 | 
						|
        || (x)==PIX_FMT_YUV420P16LE \
 | 
						|
        || (x)==PIX_FMT_YUV422P16LE \
 | 
						|
        || (x)==PIX_FMT_YUV444P16LE \
 | 
						|
        || (x)==PIX_FMT_YUV420P16BE \
 | 
						|
        || (x)==PIX_FMT_YUV422P16BE \
 | 
						|
        || (x)==PIX_FMT_YUV444P16BE \
 | 
						|
    )
 | 
						|
#define isNBPS(x)       (           \
 | 
						|
           (x)==PIX_FMT_YUV420P9LE  \
 | 
						|
        || (x)==PIX_FMT_YUV420P9BE  \
 | 
						|
        || (x)==PIX_FMT_YUV444P9BE  \
 | 
						|
        || (x)==PIX_FMT_YUV444P9LE  \
 | 
						|
        || (x)==PIX_FMT_YUV422P10BE \
 | 
						|
        || (x)==PIX_FMT_YUV422P10LE \
 | 
						|
        || (x)==PIX_FMT_YUV444P10BE \
 | 
						|
        || (x)==PIX_FMT_YUV444P10LE \
 | 
						|
        || (x)==PIX_FMT_YUV420P10LE \
 | 
						|
        || (x)==PIX_FMT_YUV420P10BE \
 | 
						|
        || (x)==PIX_FMT_YUV422P10LE \
 | 
						|
        || (x)==PIX_FMT_YUV422P10BE \
 | 
						|
    )
 | 
						|
#define is9_OR_10BPS isNBPS //for ronald
 | 
						|
#define isBE(x) ((x)&1)
 | 
						|
#define isPlanar8YUV(x) (           \
 | 
						|
           (x)==PIX_FMT_YUV410P     \
 | 
						|
        || (x)==PIX_FMT_YUV420P     \
 | 
						|
        || (x)==PIX_FMT_YUVA420P    \
 | 
						|
        || (x)==PIX_FMT_YUV411P     \
 | 
						|
        || (x)==PIX_FMT_YUV422P     \
 | 
						|
        || (x)==PIX_FMT_YUV444P     \
 | 
						|
        || (x)==PIX_FMT_YUV440P     \
 | 
						|
        || (x)==PIX_FMT_NV12        \
 | 
						|
        || (x)==PIX_FMT_NV21        \
 | 
						|
    )
 | 
						|
#define isPlanarYUV(x)  (           \
 | 
						|
        isPlanar8YUV(x)             \
 | 
						|
        || (x)==PIX_FMT_YUV420P9LE  \
 | 
						|
        || (x)==PIX_FMT_YUV444P9LE  \
 | 
						|
        || (x)==PIX_FMT_YUV420P10LE \
 | 
						|
        || (x)==PIX_FMT_YUV422P10LE \
 | 
						|
        || (x)==PIX_FMT_YUV444P10LE \
 | 
						|
        || (x)==PIX_FMT_YUV420P16LE \
 | 
						|
        || (x)==PIX_FMT_YUV422P10LE \
 | 
						|
        || (x)==PIX_FMT_YUV422P16LE \
 | 
						|
        || (x)==PIX_FMT_YUV444P16LE \
 | 
						|
        || (x)==PIX_FMT_YUV420P9BE  \
 | 
						|
        || (x)==PIX_FMT_YUV444P9BE  \
 | 
						|
        || (x)==PIX_FMT_YUV420P10BE \
 | 
						|
        || (x)==PIX_FMT_YUV422P10BE \
 | 
						|
        || (x)==PIX_FMT_YUV444P10BE \
 | 
						|
        || (x)==PIX_FMT_YUV420P16BE \
 | 
						|
        || (x)==PIX_FMT_YUV422P10BE \
 | 
						|
        || (x)==PIX_FMT_YUV422P16BE \
 | 
						|
        || (x)==PIX_FMT_YUV444P16BE \
 | 
						|
    )
 | 
						|
#define isYUV(x)        (           \
 | 
						|
           (x)==PIX_FMT_UYVY422     \
 | 
						|
        || (x)==PIX_FMT_YUYV422     \
 | 
						|
        || isPlanarYUV(x)           \
 | 
						|
    )
 | 
						|
#define isGray(x)       (           \
 | 
						|
           (x)==PIX_FMT_GRAY8       \
 | 
						|
        || (x)==PIX_FMT_GRAY8A      \
 | 
						|
        || (x)==PIX_FMT_GRAY16BE    \
 | 
						|
        || (x)==PIX_FMT_GRAY16LE    \
 | 
						|
    )
 | 
						|
#define isGray16(x)     (           \
 | 
						|
           (x)==PIX_FMT_GRAY16BE    \
 | 
						|
        || (x)==PIX_FMT_GRAY16LE    \
 | 
						|
    )
 | 
						|
#define isRGBinInt(x)   (           \
 | 
						|
           (x)==PIX_FMT_RGB48BE     \
 | 
						|
        || (x)==PIX_FMT_RGB48LE     \
 | 
						|
        || (x)==PIX_FMT_RGB32       \
 | 
						|
        || (x)==PIX_FMT_RGB32_1     \
 | 
						|
        || (x)==PIX_FMT_RGB24       \
 | 
						|
        || (x)==PIX_FMT_RGB565BE    \
 | 
						|
        || (x)==PIX_FMT_RGB565LE    \
 | 
						|
        || (x)==PIX_FMT_RGB555BE    \
 | 
						|
        || (x)==PIX_FMT_RGB555LE    \
 | 
						|
        || (x)==PIX_FMT_RGB444BE    \
 | 
						|
        || (x)==PIX_FMT_RGB444LE    \
 | 
						|
        || (x)==PIX_FMT_RGB8        \
 | 
						|
        || (x)==PIX_FMT_RGB4        \
 | 
						|
        || (x)==PIX_FMT_RGB4_BYTE   \
 | 
						|
        || (x)==PIX_FMT_MONOBLACK   \
 | 
						|
        || (x)==PIX_FMT_MONOWHITE   \
 | 
						|
    )
 | 
						|
#define isBGRinInt(x)   (           \
 | 
						|
           (x)==PIX_FMT_BGR48BE     \
 | 
						|
        || (x)==PIX_FMT_BGR48LE     \
 | 
						|
        || (x)==PIX_FMT_BGR32       \
 | 
						|
        || (x)==PIX_FMT_BGR32_1     \
 | 
						|
        || (x)==PIX_FMT_BGR24       \
 | 
						|
        || (x)==PIX_FMT_BGR565BE    \
 | 
						|
        || (x)==PIX_FMT_BGR565LE    \
 | 
						|
        || (x)==PIX_FMT_BGR555BE    \
 | 
						|
        || (x)==PIX_FMT_BGR555LE    \
 | 
						|
        || (x)==PIX_FMT_BGR444BE    \
 | 
						|
        || (x)==PIX_FMT_BGR444LE    \
 | 
						|
        || (x)==PIX_FMT_BGR8        \
 | 
						|
        || (x)==PIX_FMT_BGR4        \
 | 
						|
        || (x)==PIX_FMT_BGR4_BYTE   \
 | 
						|
        || (x)==PIX_FMT_MONOBLACK   \
 | 
						|
        || (x)==PIX_FMT_MONOWHITE   \
 | 
						|
    )
 | 
						|
#define isRGBinBytes(x) (           \
 | 
						|
           (x)==PIX_FMT_RGB48BE     \
 | 
						|
        || (x)==PIX_FMT_RGB48LE     \
 | 
						|
        || (x)==PIX_FMT_RGBA        \
 | 
						|
        || (x)==PIX_FMT_ARGB        \
 | 
						|
        || (x)==PIX_FMT_RGB24       \
 | 
						|
    )
 | 
						|
#define isBGRinBytes(x) (           \
 | 
						|
           (x)==PIX_FMT_BGR48BE     \
 | 
						|
        || (x)==PIX_FMT_BGR48LE     \
 | 
						|
        || (x)==PIX_FMT_BGRA        \
 | 
						|
        || (x)==PIX_FMT_ABGR        \
 | 
						|
        || (x)==PIX_FMT_BGR24       \
 | 
						|
    )
 | 
						|
#define isAnyRGB(x)     (           \
 | 
						|
            isRGBinInt(x)           \
 | 
						|
        ||  isBGRinInt(x)           \
 | 
						|
    )
 | 
						|
#define isALPHA(x)      (           \
 | 
						|
           (x)==PIX_FMT_BGR32       \
 | 
						|
        || (x)==PIX_FMT_BGR32_1     \
 | 
						|
        || (x)==PIX_FMT_RGB32       \
 | 
						|
        || (x)==PIX_FMT_RGB32_1     \
 | 
						|
        || (x)==PIX_FMT_PAL8        \
 | 
						|
        || (x)==PIX_FMT_GRAY8A      \
 | 
						|
        || (x)==PIX_FMT_YUVA420P    \
 | 
						|
    )
 | 
						|
#define isPacked(x)         (       \
 | 
						|
           (x)==PIX_FMT_PAL8        \
 | 
						|
        || (x)==PIX_FMT_YUYV422     \
 | 
						|
        || (x)==PIX_FMT_UYVY422     \
 | 
						|
        || (x)==PIX_FMT_Y400A       \
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						|
        || isAnyRGB(x)              \
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						|
    )
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						|
#define usePal(x) ((av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL) || (x) == PIX_FMT_GRAY8A)
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						|
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						|
extern const uint64_t ff_dither4[2];
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						|
extern const uint64_t ff_dither8[2];
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						|
extern const uint8_t dithers[8][8][8];
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						|
extern const uint16_t dither_scale[15][16];
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						|
 | 
						|
 | 
						|
extern const AVClass sws_context_class;
 | 
						|
 | 
						|
/**
 | 
						|
 * Sets c->swScale to an unscaled converter if one exists for the specific
 | 
						|
 * source and destination formats, bit depths, flags, etc.
 | 
						|
 */
 | 
						|
void ff_get_unscaled_swscale(SwsContext *c);
 | 
						|
 | 
						|
void ff_swscale_get_unscaled_altivec(SwsContext *c);
 | 
						|
 | 
						|
/**
 | 
						|
 * Returns function pointer to fastest main scaler path function depending
 | 
						|
 * on architecture and available optimizations.
 | 
						|
 */
 | 
						|
SwsFunc ff_getSwsFunc(SwsContext *c);
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						|
 | 
						|
void ff_sws_init_swScale_altivec(SwsContext *c);
 | 
						|
void ff_sws_init_swScale_mmx(SwsContext *c);
 | 
						|
 | 
						|
#endif /* SWSCALE_SWSCALE_INTERNAL_H */
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