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f32dfad9dc
This was removed erroneously in
046f081b46. This define still is
necessary for getting MAP_ANONYMOUS defined on linux/glibc,
despite the define reshuffling done in that commit.
Without MAP_ANONYMOUS defined, the mprotect calls for setting the
generated mmx2 scaler code pages executable are left out, causing
crashes if that codepath is chosen.
This patch fixes scaling from 192x144 to 320x240 with
-sws_flags fast_bilinear, which crashes on linux at the
moment.
Signed-off-by: Martin Storsjö <martin@martin.st>
1533 lines
54 KiB
C
1533 lines
54 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 Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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#define _SVID_SOURCE //needed for MAP_ANONYMOUS
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#include <inttypes.h>
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#include <string.h>
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#include <math.h>
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#include <stdio.h>
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#include "config.h"
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#include <assert.h>
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#if HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
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#define MAP_ANONYMOUS MAP_ANON
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#endif
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#endif
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#if HAVE_VIRTUALALLOC
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#endif
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#include "swscale.h"
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#include "swscale_internal.h"
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#include "rgb2rgb.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/x86_cpu.h"
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#include "libavutil/cpu.h"
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#include "libavutil/avutil.h"
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#include "libavutil/bswap.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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unsigned swscale_version(void)
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{
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return LIBSWSCALE_VERSION_INT;
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}
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const char *swscale_configuration(void)
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{
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return LIBAV_CONFIGURATION;
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}
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const char *swscale_license(void)
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{
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#define LICENSE_PREFIX "libswscale license: "
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return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
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}
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#define RET 0xC3 //near return opcode for x86
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typedef struct FormatEntry {
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int is_supported_in, is_supported_out;
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} FormatEntry;
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const static FormatEntry format_entries[PIX_FMT_NB] = {
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[PIX_FMT_YUV420P] = { 1 , 1 },
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[PIX_FMT_YUYV422] = { 1 , 1 },
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[PIX_FMT_RGB24] = { 1 , 1 },
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[PIX_FMT_BGR24] = { 1 , 1 },
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[PIX_FMT_YUV422P] = { 1 , 1 },
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[PIX_FMT_YUV444P] = { 1 , 1 },
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[PIX_FMT_YUV410P] = { 1 , 1 },
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[PIX_FMT_YUV411P] = { 1 , 1 },
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[PIX_FMT_GRAY8] = { 1 , 1 },
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[PIX_FMT_MONOWHITE] = { 1 , 1 },
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[PIX_FMT_MONOBLACK] = { 1 , 1 },
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[PIX_FMT_PAL8] = { 1 , 0 },
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[PIX_FMT_YUVJ420P] = { 1 , 1 },
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[PIX_FMT_YUVJ422P] = { 1 , 1 },
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[PIX_FMT_YUVJ444P] = { 1 , 1 },
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[PIX_FMT_UYVY422] = { 1 , 1 },
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[PIX_FMT_UYYVYY411] = { 0 , 0 },
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[PIX_FMT_BGR8] = { 1 , 1 },
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[PIX_FMT_BGR4] = { 0 , 1 },
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[PIX_FMT_BGR4_BYTE] = { 1 , 1 },
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[PIX_FMT_RGB8] = { 1 , 1 },
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[PIX_FMT_RGB4] = { 0 , 1 },
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[PIX_FMT_RGB4_BYTE] = { 1 , 1 },
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[PIX_FMT_NV12] = { 1 , 1 },
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[PIX_FMT_NV21] = { 1 , 1 },
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[PIX_FMT_ARGB] = { 1 , 1 },
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[PIX_FMT_RGBA] = { 1 , 1 },
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[PIX_FMT_ABGR] = { 1 , 1 },
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[PIX_FMT_BGRA] = { 1 , 1 },
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[PIX_FMT_GRAY16BE] = { 1 , 1 },
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[PIX_FMT_GRAY16LE] = { 1 , 1 },
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[PIX_FMT_YUV440P] = { 1 , 1 },
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[PIX_FMT_YUVJ440P] = { 1 , 1 },
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[PIX_FMT_YUVA420P] = { 1 , 1 },
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[PIX_FMT_RGB48BE] = { 1 , 1 },
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[PIX_FMT_RGB48LE] = { 1 , 1 },
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[PIX_FMT_RGB565BE] = { 1 , 1 },
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[PIX_FMT_RGB565LE] = { 1 , 1 },
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[PIX_FMT_RGB555BE] = { 1 , 1 },
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[PIX_FMT_RGB555LE] = { 1 , 1 },
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[PIX_FMT_BGR565BE] = { 1 , 1 },
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[PIX_FMT_BGR565LE] = { 1 , 1 },
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[PIX_FMT_BGR555BE] = { 1 , 1 },
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[PIX_FMT_BGR555LE] = { 1 , 1 },
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[PIX_FMT_YUV420P16LE] = { 1 , 1 },
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[PIX_FMT_YUV420P16BE] = { 1 , 1 },
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[PIX_FMT_YUV422P16LE] = { 1 , 1 },
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[PIX_FMT_YUV422P16BE] = { 1 , 1 },
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[PIX_FMT_YUV444P16LE] = { 1 , 1 },
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[PIX_FMT_YUV444P16BE] = { 1 , 1 },
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[PIX_FMT_RGB444LE] = { 0 , 1 },
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[PIX_FMT_RGB444BE] = { 0 , 1 },
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[PIX_FMT_BGR444LE] = { 0 , 1 },
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[PIX_FMT_BGR444BE] = { 0 , 1 },
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[PIX_FMT_Y400A] = { 1 , 0 },
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[PIX_FMT_BGR48BE] = { 1 , 1 },
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[PIX_FMT_BGR48LE] = { 1 , 1 },
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[PIX_FMT_YUV420P9BE] = { 1 , 1 },
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[PIX_FMT_YUV420P9LE] = { 1 , 1 },
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[PIX_FMT_YUV420P10BE] = { 1 , 1 },
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[PIX_FMT_YUV420P10LE] = { 1 , 1 },
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[PIX_FMT_YUV422P9BE] = { 1 , 1 },
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[PIX_FMT_YUV422P9LE] = { 1 , 1 },
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[PIX_FMT_YUV422P10BE] = { 1 , 1 },
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[PIX_FMT_YUV422P10LE] = { 1 , 1 },
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[PIX_FMT_YUV444P9BE] = { 1 , 1 },
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[PIX_FMT_YUV444P9LE] = { 1 , 1 },
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[PIX_FMT_YUV444P10BE] = { 1 , 1 },
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[PIX_FMT_YUV444P10LE] = { 1 , 1 },
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[PIX_FMT_GBRP] = { 1 , 0 },
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[PIX_FMT_GBRP9LE] = { 1 , 0 },
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[PIX_FMT_GBRP9BE] = { 1 , 0 },
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[PIX_FMT_GBRP10LE] = { 1 , 0 },
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[PIX_FMT_GBRP10BE] = { 1 , 0 },
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[PIX_FMT_GBRP16LE] = { 1 , 0 },
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[PIX_FMT_GBRP16BE] = { 1 , 0 },
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};
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int sws_isSupportedInput(enum PixelFormat pix_fmt)
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{
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return (unsigned)pix_fmt < PIX_FMT_NB ?
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format_entries[pix_fmt].is_supported_in : 0;
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}
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int sws_isSupportedOutput(enum PixelFormat pix_fmt)
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{
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return (unsigned)pix_fmt < PIX_FMT_NB ?
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format_entries[pix_fmt].is_supported_out : 0;
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}
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extern const int32_t ff_yuv2rgb_coeffs[8][4];
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const char *sws_format_name(enum PixelFormat format)
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{
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if ((unsigned)format < PIX_FMT_NB && av_pix_fmt_descriptors[format].name)
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return av_pix_fmt_descriptors[format].name;
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else
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return "Unknown format";
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}
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static double getSplineCoeff(double a, double b, double c, double d, double dist)
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{
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if (dist<=1.0) return ((d*dist + c)*dist + b)*dist +a;
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else return getSplineCoeff( 0.0,
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b+ 2.0*c + 3.0*d,
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c + 3.0*d,
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-b- 3.0*c - 6.0*d,
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dist-1.0);
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}
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static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,
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int srcW, int dstW, int filterAlign, int one, int flags, int cpu_flags,
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SwsVector *srcFilter, SwsVector *dstFilter, double param[2])
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{
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int i;
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int filterSize;
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int filter2Size;
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int minFilterSize;
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int64_t *filter=NULL;
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int64_t *filter2=NULL;
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const int64_t fone= 1LL<<54;
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int ret= -1;
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emms_c(); //FIXME this should not be required but it IS (even for non-MMX versions)
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// NOTE: the +3 is for the MMX(+1)/SSE(+3) scaler which reads over the end
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FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+3)*sizeof(int16_t), fail);
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if (FFABS(xInc - 0x10000) <10) { // unscaled
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int i;
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filterSize= 1;
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FF_ALLOCZ_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
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for (i=0; i<dstW; i++) {
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filter[i*filterSize]= fone;
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(*filterPos)[i]=i;
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}
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} else if (flags&SWS_POINT) { // lame looking point sampling mode
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int i;
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int xDstInSrc;
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filterSize= 1;
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FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
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xDstInSrc= xInc/2 - 0x8000;
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for (i=0; i<dstW; i++) {
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int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
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(*filterPos)[i]= xx;
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filter[i]= fone;
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xDstInSrc+= xInc;
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}
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} else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) { // bilinear upscale
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int i;
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int xDstInSrc;
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filterSize= 2;
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FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
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xDstInSrc= xInc/2 - 0x8000;
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for (i=0; i<dstW; i++) {
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int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
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int j;
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(*filterPos)[i]= xx;
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//bilinear upscale / linear interpolate / area averaging
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for (j=0; j<filterSize; j++) {
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int64_t coeff= fone - FFABS((xx<<16) - xDstInSrc)*(fone>>16);
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if (coeff<0) coeff=0;
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filter[i*filterSize + j]= coeff;
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xx++;
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}
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xDstInSrc+= xInc;
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}
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} else {
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int xDstInSrc;
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int sizeFactor;
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if (flags&SWS_BICUBIC) sizeFactor= 4;
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else if (flags&SWS_X) sizeFactor= 8;
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else if (flags&SWS_AREA) sizeFactor= 1; //downscale only, for upscale it is bilinear
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else if (flags&SWS_GAUSS) sizeFactor= 8; // infinite ;)
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else if (flags&SWS_LANCZOS) sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6;
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else if (flags&SWS_SINC) sizeFactor= 20; // infinite ;)
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else if (flags&SWS_SPLINE) sizeFactor= 20; // infinite ;)
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else if (flags&SWS_BILINEAR) sizeFactor= 2;
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else {
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sizeFactor= 0; //GCC warning killer
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assert(0);
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}
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if (xInc <= 1<<16) filterSize= 1 + sizeFactor; // upscale
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else filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;
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if (filterSize > srcW-2) filterSize=srcW-2;
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FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
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xDstInSrc= xInc - 0x10000;
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for (i=0; i<dstW; i++) {
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int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17);
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int j;
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(*filterPos)[i]= xx;
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for (j=0; j<filterSize; j++) {
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int64_t d= ((int64_t)FFABS((xx<<17) - xDstInSrc))<<13;
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double floatd;
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int64_t coeff;
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if (xInc > 1<<16)
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d= d*dstW/srcW;
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floatd= d * (1.0/(1<<30));
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if (flags & SWS_BICUBIC) {
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int64_t B= (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1<<24);
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int64_t C= (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1<<24);
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if (d >= 1LL<<31) {
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coeff = 0.0;
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} else {
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int64_t dd = (d * d) >> 30;
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int64_t ddd = (dd * d) >> 30;
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if (d < 1LL<<30)
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coeff = (12*(1<<24)-9*B-6*C)*ddd + (-18*(1<<24)+12*B+6*C)*dd + (6*(1<<24)-2*B)*(1<<30);
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else
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coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30);
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}
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coeff *= fone>>(30+24);
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}
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/* else if (flags & SWS_X) {
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double p= param ? param*0.01 : 0.3;
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coeff = d ? sin(d*M_PI)/(d*M_PI) : 1.0;
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coeff*= pow(2.0, - p*d*d);
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}*/
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else if (flags & SWS_X) {
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double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
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double c;
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if (floatd<1.0)
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c = cos(floatd*M_PI);
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else
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c=-1.0;
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if (c<0.0) c= -pow(-c, A);
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else c= pow( c, A);
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coeff= (c*0.5 + 0.5)*fone;
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} else if (flags & SWS_AREA) {
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int64_t d2= d - (1<<29);
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if (d2*xInc < -(1LL<<(29+16))) coeff= 1.0 * (1LL<<(30+16));
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else if (d2*xInc < (1LL<<(29+16))) coeff= -d2*xInc + (1LL<<(29+16));
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else coeff=0.0;
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coeff *= fone>>(30+16);
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} else if (flags & SWS_GAUSS) {
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double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
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coeff = (pow(2.0, - p*floatd*floatd))*fone;
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} else if (flags & SWS_SINC) {
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coeff = (d ? sin(floatd*M_PI)/(floatd*M_PI) : 1.0)*fone;
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} else if (flags & SWS_LANCZOS) {
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double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
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coeff = (d ? sin(floatd*M_PI)*sin(floatd*M_PI/p)/(floatd*floatd*M_PI*M_PI/p) : 1.0)*fone;
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if (floatd>p) coeff=0;
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} else if (flags & SWS_BILINEAR) {
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coeff= (1<<30) - d;
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if (coeff<0) coeff=0;
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coeff *= fone >> 30;
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} else if (flags & SWS_SPLINE) {
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double p=-2.196152422706632;
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coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, floatd) * fone;
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} else {
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coeff= 0.0; //GCC warning killer
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assert(0);
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}
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filter[i*filterSize + j]= coeff;
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xx++;
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}
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xDstInSrc+= 2*xInc;
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}
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}
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/* apply src & dst Filter to filter -> filter2
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av_free(filter);
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*/
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assert(filterSize>0);
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filter2Size= filterSize;
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if (srcFilter) filter2Size+= srcFilter->length - 1;
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if (dstFilter) filter2Size+= dstFilter->length - 1;
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assert(filter2Size>0);
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FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size*dstW*sizeof(*filter2), fail);
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for (i=0; i<dstW; i++) {
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int j, k;
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if(srcFilter) {
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for (k=0; k<srcFilter->length; k++) {
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for (j=0; j<filterSize; j++)
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filter2[i*filter2Size + k + j] += srcFilter->coeff[k]*filter[i*filterSize + j];
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}
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} else {
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for (j=0; j<filterSize; j++)
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filter2[i*filter2Size + j]= filter[i*filterSize + j];
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}
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//FIXME dstFilter
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(*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;
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}
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av_freep(&filter);
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/* try to reduce the filter-size (step1 find size and shift left) */
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// Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).
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minFilterSize= 0;
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for (i=dstW-1; i>=0; i--) {
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int min= filter2Size;
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int j;
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int64_t cutOff=0.0;
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/* get rid of near zero elements on the left by shifting left */
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for (j=0; j<filter2Size; j++) {
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int k;
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cutOff += FFABS(filter2[i*filter2Size]);
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if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
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/* preserve monotonicity because the core can't handle the filter otherwise */
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if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;
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// move filter coefficients left
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for (k=1; k<filter2Size; k++)
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filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];
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filter2[i*filter2Size + k - 1]= 0;
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(*filterPos)[i]++;
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}
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cutOff=0;
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/* count near zeros on the right */
|
|
for (j=filter2Size-1; j>0; j--) {
|
|
cutOff += FFABS(filter2[i*filter2Size + j]);
|
|
|
|
if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
|
|
min--;
|
|
}
|
|
|
|
if (min>minFilterSize) minFilterSize= min;
|
|
}
|
|
|
|
if (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) {
|
|
// we can handle the special case 4,
|
|
// so we don't want to go to the full 8
|
|
if (minFilterSize < 5)
|
|
filterAlign = 4;
|
|
|
|
// We really don't want to waste our time
|
|
// doing useless computation, so fall back on
|
|
// the scalar C code for very small filters.
|
|
// Vectorizing is worth it only if you have a
|
|
// decent-sized vector.
|
|
if (minFilterSize < 3)
|
|
filterAlign = 1;
|
|
}
|
|
|
|
if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
|
|
// special case for unscaled vertical filtering
|
|
if (minFilterSize == 1 && filterAlign == 2)
|
|
filterAlign= 1;
|
|
}
|
|
|
|
assert(minFilterSize > 0);
|
|
filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));
|
|
assert(filterSize > 0);
|
|
filter= av_malloc(filterSize*dstW*sizeof(*filter));
|
|
if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)
|
|
goto fail;
|
|
*outFilterSize= filterSize;
|
|
|
|
if (flags&SWS_PRINT_INFO)
|
|
av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);
|
|
/* try to reduce the filter-size (step2 reduce it) */
|
|
for (i=0; i<dstW; i++) {
|
|
int j;
|
|
|
|
for (j=0; j<filterSize; j++) {
|
|
if (j>=filter2Size) filter[i*filterSize + j]= 0;
|
|
else filter[i*filterSize + j]= filter2[i*filter2Size + j];
|
|
if((flags & SWS_BITEXACT) && j>=minFilterSize)
|
|
filter[i*filterSize + j]= 0;
|
|
}
|
|
}
|
|
|
|
//FIXME try to align filterPos if possible
|
|
|
|
//fix borders
|
|
for (i=0; i<dstW; i++) {
|
|
int j;
|
|
if ((*filterPos)[i] < 0) {
|
|
// move filter coefficients left to compensate for filterPos
|
|
for (j=1; j<filterSize; j++) {
|
|
int left= FFMAX(j + (*filterPos)[i], 0);
|
|
filter[i*filterSize + left] += filter[i*filterSize + j];
|
|
filter[i*filterSize + j]=0;
|
|
}
|
|
(*filterPos)[i]= 0;
|
|
}
|
|
|
|
if ((*filterPos)[i] + filterSize > srcW) {
|
|
int shift= (*filterPos)[i] + filterSize - srcW;
|
|
// move filter coefficients right to compensate for filterPos
|
|
for (j=filterSize-2; j>=0; j--) {
|
|
int right= FFMIN(j + shift, filterSize-1);
|
|
filter[i*filterSize +right] += filter[i*filterSize +j];
|
|
filter[i*filterSize +j]=0;
|
|
}
|
|
(*filterPos)[i]= srcW - filterSize;
|
|
}
|
|
}
|
|
|
|
// Note the +1 is for the MMX scaler which reads over the end
|
|
/* align at 16 for AltiVec (needed by hScale_altivec_real) */
|
|
FF_ALLOCZ_OR_GOTO(NULL, *outFilter, *outFilterSize*(dstW+3)*sizeof(int16_t), fail);
|
|
|
|
/* normalize & store in outFilter */
|
|
for (i=0; i<dstW; i++) {
|
|
int j;
|
|
int64_t error=0;
|
|
int64_t sum=0;
|
|
|
|
for (j=0; j<filterSize; j++) {
|
|
sum+= filter[i*filterSize + j];
|
|
}
|
|
sum= (sum + one/2)/ one;
|
|
for (j=0; j<*outFilterSize; j++) {
|
|
int64_t v= filter[i*filterSize + j] + error;
|
|
int intV= ROUNDED_DIV(v, sum);
|
|
(*outFilter)[i*(*outFilterSize) + j]= intV;
|
|
error= v - intV*sum;
|
|
}
|
|
}
|
|
|
|
(*filterPos)[dstW+0] =
|
|
(*filterPos)[dstW+1] =
|
|
(*filterPos)[dstW+2] = (*filterPos)[dstW-1]; // the MMX/SSE scaler will read over the end
|
|
for (i=0; i<*outFilterSize; i++) {
|
|
int k= (dstW - 1) * (*outFilterSize) + i;
|
|
(*outFilter)[k + 1 * (*outFilterSize)] =
|
|
(*outFilter)[k + 2 * (*outFilterSize)] =
|
|
(*outFilter)[k + 3 * (*outFilterSize)] = (*outFilter)[k];
|
|
}
|
|
|
|
ret=0;
|
|
fail:
|
|
av_free(filter);
|
|
av_free(filter2);
|
|
return ret;
|
|
}
|
|
|
|
#if HAVE_MMX2
|
|
static int initMMX2HScaler(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)
|
|
{
|
|
uint8_t *fragmentA;
|
|
x86_reg imm8OfPShufW1A;
|
|
x86_reg imm8OfPShufW2A;
|
|
x86_reg fragmentLengthA;
|
|
uint8_t *fragmentB;
|
|
x86_reg imm8OfPShufW1B;
|
|
x86_reg imm8OfPShufW2B;
|
|
x86_reg fragmentLengthB;
|
|
int fragmentPos;
|
|
|
|
int xpos, i;
|
|
|
|
// create an optimized horizontal scaling routine
|
|
/* This scaler is made of runtime-generated MMX2 code using specially
|
|
* tuned pshufw instructions. For every four output pixels, if four
|
|
* input pixels are enough for the fast bilinear scaling, then a chunk
|
|
* of fragmentB is used. If five input pixels are needed, then a chunk
|
|
* of fragmentA is used.
|
|
*/
|
|
|
|
//code fragment
|
|
|
|
__asm__ volatile(
|
|
"jmp 9f \n\t"
|
|
// Begin
|
|
"0: \n\t"
|
|
"movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t"
|
|
"movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t"
|
|
"movd 1(%%"REG_c", %%"REG_S"), %%mm1 \n\t"
|
|
"punpcklbw %%mm7, %%mm1 \n\t"
|
|
"punpcklbw %%mm7, %%mm0 \n\t"
|
|
"pshufw $0xFF, %%mm1, %%mm1 \n\t"
|
|
"1: \n\t"
|
|
"pshufw $0xFF, %%mm0, %%mm0 \n\t"
|
|
"2: \n\t"
|
|
"psubw %%mm1, %%mm0 \n\t"
|
|
"movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t"
|
|
"pmullw %%mm3, %%mm0 \n\t"
|
|
"psllw $7, %%mm1 \n\t"
|
|
"paddw %%mm1, %%mm0 \n\t"
|
|
|
|
"movq %%mm0, (%%"REG_D", %%"REG_a") \n\t"
|
|
|
|
"add $8, %%"REG_a" \n\t"
|
|
// End
|
|
"9: \n\t"
|
|
// "int $3 \n\t"
|
|
"lea " LOCAL_MANGLE(0b) ", %0 \n\t"
|
|
"lea " LOCAL_MANGLE(1b) ", %1 \n\t"
|
|
"lea " LOCAL_MANGLE(2b) ", %2 \n\t"
|
|
"dec %1 \n\t"
|
|
"dec %2 \n\t"
|
|
"sub %0, %1 \n\t"
|
|
"sub %0, %2 \n\t"
|
|
"lea " LOCAL_MANGLE(9b) ", %3 \n\t"
|
|
"sub %0, %3 \n\t"
|
|
|
|
|
|
:"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),
|
|
"=r" (fragmentLengthA)
|
|
);
|
|
|
|
__asm__ volatile(
|
|
"jmp 9f \n\t"
|
|
// Begin
|
|
"0: \n\t"
|
|
"movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t"
|
|
"movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t"
|
|
"punpcklbw %%mm7, %%mm0 \n\t"
|
|
"pshufw $0xFF, %%mm0, %%mm1 \n\t"
|
|
"1: \n\t"
|
|
"pshufw $0xFF, %%mm0, %%mm0 \n\t"
|
|
"2: \n\t"
|
|
"psubw %%mm1, %%mm0 \n\t"
|
|
"movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t"
|
|
"pmullw %%mm3, %%mm0 \n\t"
|
|
"psllw $7, %%mm1 \n\t"
|
|
"paddw %%mm1, %%mm0 \n\t"
|
|
|
|
"movq %%mm0, (%%"REG_D", %%"REG_a") \n\t"
|
|
|
|
"add $8, %%"REG_a" \n\t"
|
|
// End
|
|
"9: \n\t"
|
|
// "int $3 \n\t"
|
|
"lea " LOCAL_MANGLE(0b) ", %0 \n\t"
|
|
"lea " LOCAL_MANGLE(1b) ", %1 \n\t"
|
|
"lea " LOCAL_MANGLE(2b) ", %2 \n\t"
|
|
"dec %1 \n\t"
|
|
"dec %2 \n\t"
|
|
"sub %0, %1 \n\t"
|
|
"sub %0, %2 \n\t"
|
|
"lea " LOCAL_MANGLE(9b) ", %3 \n\t"
|
|
"sub %0, %3 \n\t"
|
|
|
|
|
|
:"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),
|
|
"=r" (fragmentLengthB)
|
|
);
|
|
|
|
xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers
|
|
fragmentPos=0;
|
|
|
|
for (i=0; i<dstW/numSplits; i++) {
|
|
int xx=xpos>>16;
|
|
|
|
if ((i&3) == 0) {
|
|
int a=0;
|
|
int b=((xpos+xInc)>>16) - xx;
|
|
int c=((xpos+xInc*2)>>16) - xx;
|
|
int d=((xpos+xInc*3)>>16) - xx;
|
|
int inc = (d+1<4);
|
|
uint8_t *fragment = (d+1<4) ? fragmentB : fragmentA;
|
|
x86_reg imm8OfPShufW1 = (d+1<4) ? imm8OfPShufW1B : imm8OfPShufW1A;
|
|
x86_reg imm8OfPShufW2 = (d+1<4) ? imm8OfPShufW2B : imm8OfPShufW2A;
|
|
x86_reg fragmentLength = (d+1<4) ? fragmentLengthB : fragmentLengthA;
|
|
int maxShift= 3-(d+inc);
|
|
int shift=0;
|
|
|
|
if (filterCode) {
|
|
filter[i ] = (( xpos & 0xFFFF) ^ 0xFFFF)>>9;
|
|
filter[i+1] = (((xpos+xInc ) & 0xFFFF) ^ 0xFFFF)>>9;
|
|
filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;
|
|
filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;
|
|
filterPos[i/2]= xx;
|
|
|
|
memcpy(filterCode + fragmentPos, fragment, fragmentLength);
|
|
|
|
filterCode[fragmentPos + imm8OfPShufW1]=
|
|
(a+inc) | ((b+inc)<<2) | ((c+inc)<<4) | ((d+inc)<<6);
|
|
filterCode[fragmentPos + imm8OfPShufW2]=
|
|
a | (b<<2) | (c<<4) | (d<<6);
|
|
|
|
if (i+4-inc>=dstW) shift=maxShift; //avoid overread
|
|
else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align
|
|
|
|
if (shift && i>=shift) {
|
|
filterCode[fragmentPos + imm8OfPShufW1]+= 0x55*shift;
|
|
filterCode[fragmentPos + imm8OfPShufW2]+= 0x55*shift;
|
|
filterPos[i/2]-=shift;
|
|
}
|
|
}
|
|
|
|
fragmentPos+= fragmentLength;
|
|
|
|
if (filterCode)
|
|
filterCode[fragmentPos]= RET;
|
|
}
|
|
xpos+=xInc;
|
|
}
|
|
if (filterCode)
|
|
filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part
|
|
|
|
return fragmentPos + 1;
|
|
}
|
|
#endif /* HAVE_MMX2 */
|
|
|
|
static void getSubSampleFactors(int *h, int *v, enum PixelFormat format)
|
|
{
|
|
*h = av_pix_fmt_descriptors[format].log2_chroma_w;
|
|
*v = av_pix_fmt_descriptors[format].log2_chroma_h;
|
|
}
|
|
|
|
int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4],
|
|
int srcRange, const int table[4], int dstRange,
|
|
int brightness, int contrast, int saturation)
|
|
{
|
|
memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);
|
|
memcpy(c->dstColorspaceTable, table, sizeof(int)*4);
|
|
|
|
c->brightness= brightness;
|
|
c->contrast = contrast;
|
|
c->saturation= saturation;
|
|
c->srcRange = srcRange;
|
|
c->dstRange = dstRange;
|
|
if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
|
|
|
|
c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->dstFormat]);
|
|
c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->srcFormat]);
|
|
|
|
ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);
|
|
//FIXME factorize
|
|
|
|
if (HAVE_ALTIVEC && av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)
|
|
ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation);
|
|
return 0;
|
|
}
|
|
|
|
int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
|
|
int *srcRange, int **table, int *dstRange,
|
|
int *brightness, int *contrast, int *saturation)
|
|
{
|
|
if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
|
|
|
|
*inv_table = c->srcColorspaceTable;
|
|
*table = c->dstColorspaceTable;
|
|
*srcRange = c->srcRange;
|
|
*dstRange = c->dstRange;
|
|
*brightness= c->brightness;
|
|
*contrast = c->contrast;
|
|
*saturation= c->saturation;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int handle_jpeg(enum PixelFormat *format)
|
|
{
|
|
switch (*format) {
|
|
case PIX_FMT_YUVJ420P: *format = PIX_FMT_YUV420P; return 1;
|
|
case PIX_FMT_YUVJ422P: *format = PIX_FMT_YUV422P; return 1;
|
|
case PIX_FMT_YUVJ444P: *format = PIX_FMT_YUV444P; return 1;
|
|
case PIX_FMT_YUVJ440P: *format = PIX_FMT_YUV440P; return 1;
|
|
default: return 0;
|
|
}
|
|
}
|
|
|
|
SwsContext *sws_alloc_context(void)
|
|
{
|
|
SwsContext *c= av_mallocz(sizeof(SwsContext));
|
|
|
|
c->av_class = &sws_context_class;
|
|
av_opt_set_defaults(c);
|
|
|
|
return c;
|
|
}
|
|
|
|
int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter)
|
|
{
|
|
int i;
|
|
int usesVFilter, usesHFilter;
|
|
int unscaled;
|
|
SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};
|
|
int srcW= c->srcW;
|
|
int srcH= c->srcH;
|
|
int dstW= c->dstW;
|
|
int dstH= c->dstH;
|
|
int dst_stride = FFALIGN(dstW * sizeof(int16_t) + 16, 16), dst_stride_px = dst_stride >> 1;
|
|
int flags, cpu_flags;
|
|
enum PixelFormat srcFormat= c->srcFormat;
|
|
enum PixelFormat dstFormat= c->dstFormat;
|
|
|
|
cpu_flags = av_get_cpu_flags();
|
|
flags = c->flags;
|
|
emms_c();
|
|
if (!rgb15to16) sws_rgb2rgb_init();
|
|
|
|
unscaled = (srcW == dstW && srcH == dstH);
|
|
|
|
if (!sws_isSupportedInput(srcFormat)) {
|
|
av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n", sws_format_name(srcFormat));
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if (!sws_isSupportedOutput(dstFormat)) {
|
|
av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n", sws_format_name(dstFormat));
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
i= flags & ( SWS_POINT
|
|
|SWS_AREA
|
|
|SWS_BILINEAR
|
|
|SWS_FAST_BILINEAR
|
|
|SWS_BICUBIC
|
|
|SWS_X
|
|
|SWS_GAUSS
|
|
|SWS_LANCZOS
|
|
|SWS_SINC
|
|
|SWS_SPLINE
|
|
|SWS_BICUBLIN);
|
|
if(!i || (i & (i-1))) {
|
|
av_log(c, AV_LOG_ERROR, "Exactly one scaler algorithm must be chosen\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
/* sanity check */
|
|
if (srcW<4 || srcH<1 || dstW<8 || dstH<1) { //FIXME check if these are enough and try to lowwer them after fixing the relevant parts of the code
|
|
av_log(c, AV_LOG_ERROR, "%dx%d -> %dx%d is invalid scaling dimension\n",
|
|
srcW, srcH, dstW, dstH);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (!dstFilter) dstFilter= &dummyFilter;
|
|
if (!srcFilter) srcFilter= &dummyFilter;
|
|
|
|
c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;
|
|
c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;
|
|
c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[dstFormat]);
|
|
c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[srcFormat]);
|
|
c->vRounder= 4* 0x0001000100010001ULL;
|
|
|
|
usesVFilter = (srcFilter->lumV && srcFilter->lumV->length>1) ||
|
|
(srcFilter->chrV && srcFilter->chrV->length>1) ||
|
|
(dstFilter->lumV && dstFilter->lumV->length>1) ||
|
|
(dstFilter->chrV && dstFilter->chrV->length>1);
|
|
usesHFilter = (srcFilter->lumH && srcFilter->lumH->length>1) ||
|
|
(srcFilter->chrH && srcFilter->chrH->length>1) ||
|
|
(dstFilter->lumH && dstFilter->lumH->length>1) ||
|
|
(dstFilter->chrH && dstFilter->chrH->length>1);
|
|
|
|
getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);
|
|
getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);
|
|
|
|
// reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation
|
|
if (flags & SWS_FULL_CHR_H_INT &&
|
|
dstFormat != PIX_FMT_RGBA &&
|
|
dstFormat != PIX_FMT_ARGB &&
|
|
dstFormat != PIX_FMT_BGRA &&
|
|
dstFormat != PIX_FMT_ABGR &&
|
|
dstFormat != PIX_FMT_RGB24 &&
|
|
dstFormat != PIX_FMT_BGR24) {
|
|
av_log(c, AV_LOG_ERROR,
|
|
"full chroma interpolation for destination format '%s' not yet implemented\n",
|
|
sws_format_name(dstFormat));
|
|
flags &= ~SWS_FULL_CHR_H_INT;
|
|
c->flags = flags;
|
|
}
|
|
if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;
|
|
|
|
// drop some chroma lines if the user wants it
|
|
c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;
|
|
c->chrSrcVSubSample+= c->vChrDrop;
|
|
|
|
// drop every other pixel for chroma calculation unless user wants full chroma
|
|
if (isAnyRGB(srcFormat) && !(flags&SWS_FULL_CHR_H_INP)
|
|
&& srcFormat!=PIX_FMT_RGB8 && srcFormat!=PIX_FMT_BGR8
|
|
&& srcFormat!=PIX_FMT_RGB4 && srcFormat!=PIX_FMT_BGR4
|
|
&& srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE
|
|
&& ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&SWS_FAST_BILINEAR)))
|
|
c->chrSrcHSubSample=1;
|
|
|
|
// Note the -((-x)>>y) is so that we always round toward +inf.
|
|
c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);
|
|
c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);
|
|
c->chrDstW= -((-dstW) >> c->chrDstHSubSample);
|
|
c->chrDstH= -((-dstH) >> c->chrDstVSubSample);
|
|
|
|
/* unscaled special cases */
|
|
if (unscaled && !usesHFilter && !usesVFilter && (c->srcRange == c->dstRange || isAnyRGB(dstFormat))) {
|
|
ff_get_unscaled_swscale(c);
|
|
|
|
if (c->swScale) {
|
|
if (flags&SWS_PRINT_INFO)
|
|
av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",
|
|
sws_format_name(srcFormat), sws_format_name(dstFormat));
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
c->srcBpc = 1 + av_pix_fmt_descriptors[srcFormat].comp[0].depth_minus1;
|
|
if (c->srcBpc < 8)
|
|
c->srcBpc = 8;
|
|
c->dstBpc = 1 + av_pix_fmt_descriptors[dstFormat].comp[0].depth_minus1;
|
|
if (c->dstBpc < 8)
|
|
c->dstBpc = 8;
|
|
if (c->dstBpc == 16)
|
|
dst_stride <<= 1;
|
|
FF_ALLOC_OR_GOTO(c, c->formatConvBuffer,
|
|
(FFALIGN(srcW, 16) * 2 * FFALIGN(c->srcBpc, 8) >> 3) + 16,
|
|
fail);
|
|
if (HAVE_MMX2 && cpu_flags & AV_CPU_FLAG_MMX2 && c->srcBpc == 8 && c->dstBpc <= 10) {
|
|
c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;
|
|
if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR)) {
|
|
if (flags&SWS_PRINT_INFO)
|
|
av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n");
|
|
}
|
|
if (usesHFilter) c->canMMX2BeUsed=0;
|
|
}
|
|
else
|
|
c->canMMX2BeUsed=0;
|
|
|
|
c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;
|
|
c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;
|
|
|
|
// match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst
|
|
// but only for the FAST_BILINEAR mode otherwise do correct scaling
|
|
// n-2 is the last chrominance sample available
|
|
// this is not perfect, but no one should notice the difference, the more correct variant
|
|
// would be like the vertical one, but that would require some special code for the
|
|
// first and last pixel
|
|
if (flags&SWS_FAST_BILINEAR) {
|
|
if (c->canMMX2BeUsed) {
|
|
c->lumXInc+= 20;
|
|
c->chrXInc+= 20;
|
|
}
|
|
//we don't use the x86 asm scaler if MMX is available
|
|
else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
|
|
c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;
|
|
c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;
|
|
}
|
|
}
|
|
|
|
/* precalculate horizontal scaler filter coefficients */
|
|
{
|
|
#if HAVE_MMX2
|
|
// can't downscale !!!
|
|
if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR)) {
|
|
c->lumMmx2FilterCodeSize = initMMX2HScaler( dstW, c->lumXInc, NULL, NULL, NULL, 8);
|
|
c->chrMmx2FilterCodeSize = initMMX2HScaler(c->chrDstW, c->chrXInc, NULL, NULL, NULL, 4);
|
|
|
|
#ifdef MAP_ANONYMOUS
|
|
c->lumMmx2FilterCode = mmap(NULL, c->lumMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
c->chrMmx2FilterCode = mmap(NULL, c->chrMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
#elif HAVE_VIRTUALALLOC
|
|
c->lumMmx2FilterCode = VirtualAlloc(NULL, c->lumMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
|
|
c->chrMmx2FilterCode = VirtualAlloc(NULL, c->chrMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
|
|
#else
|
|
c->lumMmx2FilterCode = av_malloc(c->lumMmx2FilterCodeSize);
|
|
c->chrMmx2FilterCode = av_malloc(c->chrMmx2FilterCodeSize);
|
|
#endif
|
|
|
|
if (!c->lumMmx2FilterCode || !c->chrMmx2FilterCode)
|
|
return AVERROR(ENOMEM);
|
|
FF_ALLOCZ_OR_GOTO(c, c->hLumFilter , (dstW /8+8)*sizeof(int16_t), fail);
|
|
FF_ALLOCZ_OR_GOTO(c, c->hChrFilter , (c->chrDstW /4+8)*sizeof(int16_t), fail);
|
|
FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW /2/8+8)*sizeof(int32_t), fail);
|
|
FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW/2/4+8)*sizeof(int32_t), fail);
|
|
|
|
initMMX2HScaler( dstW, c->lumXInc, c->lumMmx2FilterCode, c->hLumFilter, c->hLumFilterPos, 8);
|
|
initMMX2HScaler(c->chrDstW, c->chrXInc, c->chrMmx2FilterCode, c->hChrFilter, c->hChrFilterPos, 4);
|
|
|
|
#ifdef MAP_ANONYMOUS
|
|
mprotect(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
|
|
mprotect(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
|
|
#endif
|
|
} else
|
|
#endif /* HAVE_MMX2 */
|
|
{
|
|
const int filterAlign=
|
|
(HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? 4 :
|
|
(HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) ? 8 :
|
|
1;
|
|
|
|
if (initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,
|
|
srcW , dstW, filterAlign, 1<<14,
|
|
(flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags, cpu_flags,
|
|
srcFilter->lumH, dstFilter->lumH, c->param) < 0)
|
|
goto fail;
|
|
if (initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,
|
|
c->chrSrcW, c->chrDstW, filterAlign, 1<<14,
|
|
(flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, cpu_flags,
|
|
srcFilter->chrH, dstFilter->chrH, c->param) < 0)
|
|
goto fail;
|
|
}
|
|
} // initialize horizontal stuff
|
|
|
|
/* precalculate vertical scaler filter coefficients */
|
|
{
|
|
const int filterAlign=
|
|
(HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? 2 :
|
|
(HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) ? 8 :
|
|
1;
|
|
|
|
if (initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,
|
|
srcH , dstH, filterAlign, (1<<12),
|
|
(flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags, cpu_flags,
|
|
srcFilter->lumV, dstFilter->lumV, c->param) < 0)
|
|
goto fail;
|
|
if (initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,
|
|
c->chrSrcH, c->chrDstH, filterAlign, (1<<12),
|
|
(flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags, cpu_flags,
|
|
srcFilter->chrV, dstFilter->chrV, c->param) < 0)
|
|
goto fail;
|
|
|
|
#if HAVE_ALTIVEC
|
|
FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof (vector signed short)*c->vLumFilterSize*c->dstH, fail);
|
|
FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH, fail);
|
|
|
|
for (i=0;i<c->vLumFilterSize*c->dstH;i++) {
|
|
int j;
|
|
short *p = (short *)&c->vYCoeffsBank[i];
|
|
for (j=0;j<8;j++)
|
|
p[j] = c->vLumFilter[i];
|
|
}
|
|
|
|
for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {
|
|
int j;
|
|
short *p = (short *)&c->vCCoeffsBank[i];
|
|
for (j=0;j<8;j++)
|
|
p[j] = c->vChrFilter[i];
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// calculate buffer sizes so that they won't run out while handling these damn slices
|
|
c->vLumBufSize= c->vLumFilterSize;
|
|
c->vChrBufSize= c->vChrFilterSize;
|
|
for (i=0; i<dstH; i++) {
|
|
int chrI= i*c->chrDstH / dstH;
|
|
int nextSlice= FFMAX(c->vLumFilterPos[i ] + c->vLumFilterSize - 1,
|
|
((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));
|
|
|
|
nextSlice>>= c->chrSrcVSubSample;
|
|
nextSlice<<= c->chrSrcVSubSample;
|
|
if (c->vLumFilterPos[i ] + c->vLumBufSize < nextSlice)
|
|
c->vLumBufSize= nextSlice - c->vLumFilterPos[i];
|
|
if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))
|
|
c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];
|
|
}
|
|
|
|
// allocate pixbufs (we use dynamic allocation because otherwise we would need to
|
|
// allocate several megabytes to handle all possible cases)
|
|
FF_ALLOC_OR_GOTO(c, c->lumPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
|
|
FF_ALLOC_OR_GOTO(c, c->chrUPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail);
|
|
FF_ALLOC_OR_GOTO(c, c->chrVPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail);
|
|
if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))
|
|
FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
|
|
//Note we need at least one pixel more at the end because of the MMX code (just in case someone wanna replace the 4000/8000)
|
|
/* align at 16 bytes for AltiVec */
|
|
for (i=0; i<c->vLumBufSize; i++) {
|
|
FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i+c->vLumBufSize], dst_stride+16, fail);
|
|
c->lumPixBuf[i] = c->lumPixBuf[i+c->vLumBufSize];
|
|
}
|
|
// 64 / (c->dstBpc & ~7) is the same as 16 / sizeof(scaling_intermediate)
|
|
c->uv_off_px = dst_stride_px + 64 / (c->dstBpc &~ 7);
|
|
c->uv_off_byte = dst_stride + 16;
|
|
for (i=0; i<c->vChrBufSize; i++) {
|
|
FF_ALLOC_OR_GOTO(c, c->chrUPixBuf[i+c->vChrBufSize], dst_stride*2+32, fail);
|
|
c->chrUPixBuf[i] = c->chrUPixBuf[i+c->vChrBufSize];
|
|
c->chrVPixBuf[i] = c->chrVPixBuf[i+c->vChrBufSize] = c->chrUPixBuf[i] + (dst_stride >> 1) + 8;
|
|
}
|
|
if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)
|
|
for (i=0; i<c->vLumBufSize; i++) {
|
|
FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i+c->vLumBufSize], dst_stride+16, fail);
|
|
c->alpPixBuf[i] = c->alpPixBuf[i+c->vLumBufSize];
|
|
}
|
|
|
|
//try to avoid drawing green stuff between the right end and the stride end
|
|
for (i=0; i<c->vChrBufSize; i++)
|
|
memset(c->chrUPixBuf[i], 64, dst_stride*2+1);
|
|
|
|
assert(c->chrDstH <= dstH);
|
|
|
|
if (flags&SWS_PRINT_INFO) {
|
|
if (flags&SWS_FAST_BILINEAR) av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");
|
|
else if (flags&SWS_BILINEAR) av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");
|
|
else if (flags&SWS_BICUBIC) av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");
|
|
else if (flags&SWS_X) av_log(c, AV_LOG_INFO, "Experimental scaler, ");
|
|
else if (flags&SWS_POINT) av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");
|
|
else if (flags&SWS_AREA) av_log(c, AV_LOG_INFO, "Area Averaging scaler, ");
|
|
else if (flags&SWS_BICUBLIN) av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");
|
|
else if (flags&SWS_GAUSS) av_log(c, AV_LOG_INFO, "Gaussian scaler, ");
|
|
else if (flags&SWS_SINC) av_log(c, AV_LOG_INFO, "Sinc scaler, ");
|
|
else if (flags&SWS_LANCZOS) av_log(c, AV_LOG_INFO, "Lanczos scaler, ");
|
|
else if (flags&SWS_SPLINE) av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");
|
|
else av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");
|
|
|
|
av_log(c, AV_LOG_INFO, "from %s to %s%s ",
|
|
sws_format_name(srcFormat),
|
|
#ifdef DITHER1XBPP
|
|
dstFormat == PIX_FMT_BGR555 || dstFormat == PIX_FMT_BGR565 ||
|
|
dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
|
|
dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE ? "dithered " : "",
|
|
#else
|
|
"",
|
|
#endif
|
|
sws_format_name(dstFormat));
|
|
|
|
if (HAVE_MMX2 && cpu_flags & AV_CPU_FLAG_MMX2) av_log(c, AV_LOG_INFO, "using MMX2\n");
|
|
else if (HAVE_AMD3DNOW && cpu_flags & AV_CPU_FLAG_3DNOW) av_log(c, AV_LOG_INFO, "using 3DNOW\n");
|
|
else if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) av_log(c, AV_LOG_INFO, "using MMX\n");
|
|
else if (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) av_log(c, AV_LOG_INFO, "using AltiVec\n");
|
|
else av_log(c, AV_LOG_INFO, "using C\n");
|
|
|
|
av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
|
|
av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
|
|
c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
|
|
av_log(c, AV_LOG_DEBUG, "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
|
|
c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);
|
|
}
|
|
|
|
c->swScale= ff_getSwsFunc(c);
|
|
return 0;
|
|
fail: //FIXME replace things by appropriate error codes
|
|
return -1;
|
|
}
|
|
|
|
#if FF_API_SWS_GETCONTEXT
|
|
SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
|
|
int dstW, int dstH, enum PixelFormat dstFormat, int flags,
|
|
SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
|
|
{
|
|
SwsContext *c;
|
|
|
|
if(!(c=sws_alloc_context()))
|
|
return NULL;
|
|
|
|
c->flags= flags;
|
|
c->srcW= srcW;
|
|
c->srcH= srcH;
|
|
c->dstW= dstW;
|
|
c->dstH= dstH;
|
|
c->srcRange = handle_jpeg(&srcFormat);
|
|
c->dstRange = handle_jpeg(&dstFormat);
|
|
c->srcFormat= srcFormat;
|
|
c->dstFormat= dstFormat;
|
|
|
|
if (param) {
|
|
c->param[0] = param[0];
|
|
c->param[1] = param[1];
|
|
}
|
|
sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], c->srcRange, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, c->dstRange, 0, 1<<16, 1<<16);
|
|
|
|
if(sws_init_context(c, srcFilter, dstFilter) < 0){
|
|
sws_freeContext(c);
|
|
return NULL;
|
|
}
|
|
|
|
return c;
|
|
}
|
|
#endif
|
|
|
|
SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
|
|
float lumaSharpen, float chromaSharpen,
|
|
float chromaHShift, float chromaVShift,
|
|
int verbose)
|
|
{
|
|
SwsFilter *filter= av_malloc(sizeof(SwsFilter));
|
|
if (!filter)
|
|
return NULL;
|
|
|
|
if (lumaGBlur!=0.0) {
|
|
filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);
|
|
filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);
|
|
} else {
|
|
filter->lumH= sws_getIdentityVec();
|
|
filter->lumV= sws_getIdentityVec();
|
|
}
|
|
|
|
if (chromaGBlur!=0.0) {
|
|
filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);
|
|
filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);
|
|
} else {
|
|
filter->chrH= sws_getIdentityVec();
|
|
filter->chrV= sws_getIdentityVec();
|
|
}
|
|
|
|
if (chromaSharpen!=0.0) {
|
|
SwsVector *id= sws_getIdentityVec();
|
|
sws_scaleVec(filter->chrH, -chromaSharpen);
|
|
sws_scaleVec(filter->chrV, -chromaSharpen);
|
|
sws_addVec(filter->chrH, id);
|
|
sws_addVec(filter->chrV, id);
|
|
sws_freeVec(id);
|
|
}
|
|
|
|
if (lumaSharpen!=0.0) {
|
|
SwsVector *id= sws_getIdentityVec();
|
|
sws_scaleVec(filter->lumH, -lumaSharpen);
|
|
sws_scaleVec(filter->lumV, -lumaSharpen);
|
|
sws_addVec(filter->lumH, id);
|
|
sws_addVec(filter->lumV, id);
|
|
sws_freeVec(id);
|
|
}
|
|
|
|
if (chromaHShift != 0.0)
|
|
sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));
|
|
|
|
if (chromaVShift != 0.0)
|
|
sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));
|
|
|
|
sws_normalizeVec(filter->chrH, 1.0);
|
|
sws_normalizeVec(filter->chrV, 1.0);
|
|
sws_normalizeVec(filter->lumH, 1.0);
|
|
sws_normalizeVec(filter->lumV, 1.0);
|
|
|
|
if (verbose) sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
|
|
if (verbose) sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
|
|
|
|
return filter;
|
|
}
|
|
|
|
SwsVector *sws_allocVec(int length)
|
|
{
|
|
SwsVector *vec = av_malloc(sizeof(SwsVector));
|
|
if (!vec)
|
|
return NULL;
|
|
vec->length = length;
|
|
vec->coeff = av_malloc(sizeof(double) * length);
|
|
if (!vec->coeff)
|
|
av_freep(&vec);
|
|
return vec;
|
|
}
|
|
|
|
SwsVector *sws_getGaussianVec(double variance, double quality)
|
|
{
|
|
const int length= (int)(variance*quality + 0.5) | 1;
|
|
int i;
|
|
double middle= (length-1)*0.5;
|
|
SwsVector *vec= sws_allocVec(length);
|
|
|
|
if (!vec)
|
|
return NULL;
|
|
|
|
for (i=0; i<length; i++) {
|
|
double dist= i-middle;
|
|
vec->coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*M_PI);
|
|
}
|
|
|
|
sws_normalizeVec(vec, 1.0);
|
|
|
|
return vec;
|
|
}
|
|
|
|
SwsVector *sws_getConstVec(double c, int length)
|
|
{
|
|
int i;
|
|
SwsVector *vec= sws_allocVec(length);
|
|
|
|
if (!vec)
|
|
return NULL;
|
|
|
|
for (i=0; i<length; i++)
|
|
vec->coeff[i]= c;
|
|
|
|
return vec;
|
|
}
|
|
|
|
SwsVector *sws_getIdentityVec(void)
|
|
{
|
|
return sws_getConstVec(1.0, 1);
|
|
}
|
|
|
|
static double sws_dcVec(SwsVector *a)
|
|
{
|
|
int i;
|
|
double sum=0;
|
|
|
|
for (i=0; i<a->length; i++)
|
|
sum+= a->coeff[i];
|
|
|
|
return sum;
|
|
}
|
|
|
|
void sws_scaleVec(SwsVector *a, double scalar)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i<a->length; i++)
|
|
a->coeff[i]*= scalar;
|
|
}
|
|
|
|
void sws_normalizeVec(SwsVector *a, double height)
|
|
{
|
|
sws_scaleVec(a, height/sws_dcVec(a));
|
|
}
|
|
|
|
static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)
|
|
{
|
|
int length= a->length + b->length - 1;
|
|
int i, j;
|
|
SwsVector *vec= sws_getConstVec(0.0, length);
|
|
|
|
if (!vec)
|
|
return NULL;
|
|
|
|
for (i=0; i<a->length; i++) {
|
|
for (j=0; j<b->length; j++) {
|
|
vec->coeff[i+j]+= a->coeff[i]*b->coeff[j];
|
|
}
|
|
}
|
|
|
|
return vec;
|
|
}
|
|
|
|
static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)
|
|
{
|
|
int length= FFMAX(a->length, b->length);
|
|
int i;
|
|
SwsVector *vec= sws_getConstVec(0.0, length);
|
|
|
|
if (!vec)
|
|
return NULL;
|
|
|
|
for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
|
|
for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];
|
|
|
|
return vec;
|
|
}
|
|
|
|
static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)
|
|
{
|
|
int length= FFMAX(a->length, b->length);
|
|
int i;
|
|
SwsVector *vec= sws_getConstVec(0.0, length);
|
|
|
|
if (!vec)
|
|
return NULL;
|
|
|
|
for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
|
|
for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];
|
|
|
|
return vec;
|
|
}
|
|
|
|
/* shift left / or right if "shift" is negative */
|
|
static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)
|
|
{
|
|
int length= a->length + FFABS(shift)*2;
|
|
int i;
|
|
SwsVector *vec= sws_getConstVec(0.0, length);
|
|
|
|
if (!vec)
|
|
return NULL;
|
|
|
|
for (i=0; i<a->length; i++) {
|
|
vec->coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];
|
|
}
|
|
|
|
return vec;
|
|
}
|
|
|
|
void sws_shiftVec(SwsVector *a, int shift)
|
|
{
|
|
SwsVector *shifted= sws_getShiftedVec(a, shift);
|
|
av_free(a->coeff);
|
|
a->coeff= shifted->coeff;
|
|
a->length= shifted->length;
|
|
av_free(shifted);
|
|
}
|
|
|
|
void sws_addVec(SwsVector *a, SwsVector *b)
|
|
{
|
|
SwsVector *sum= sws_sumVec(a, b);
|
|
av_free(a->coeff);
|
|
a->coeff= sum->coeff;
|
|
a->length= sum->length;
|
|
av_free(sum);
|
|
}
|
|
|
|
void sws_subVec(SwsVector *a, SwsVector *b)
|
|
{
|
|
SwsVector *diff= sws_diffVec(a, b);
|
|
av_free(a->coeff);
|
|
a->coeff= diff->coeff;
|
|
a->length= diff->length;
|
|
av_free(diff);
|
|
}
|
|
|
|
void sws_convVec(SwsVector *a, SwsVector *b)
|
|
{
|
|
SwsVector *conv= sws_getConvVec(a, b);
|
|
av_free(a->coeff);
|
|
a->coeff= conv->coeff;
|
|
a->length= conv->length;
|
|
av_free(conv);
|
|
}
|
|
|
|
SwsVector *sws_cloneVec(SwsVector *a)
|
|
{
|
|
int i;
|
|
SwsVector *vec= sws_allocVec(a->length);
|
|
|
|
if (!vec)
|
|
return NULL;
|
|
|
|
for (i=0; i<a->length; i++) vec->coeff[i]= a->coeff[i];
|
|
|
|
return vec;
|
|
}
|
|
|
|
void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
|
|
{
|
|
int i;
|
|
double max=0;
|
|
double min=0;
|
|
double range;
|
|
|
|
for (i=0; i<a->length; i++)
|
|
if (a->coeff[i]>max) max= a->coeff[i];
|
|
|
|
for (i=0; i<a->length; i++)
|
|
if (a->coeff[i]<min) min= a->coeff[i];
|
|
|
|
range= max - min;
|
|
|
|
for (i=0; i<a->length; i++) {
|
|
int x= (int)((a->coeff[i]-min)*60.0/range +0.5);
|
|
av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
|
|
for (;x>0; x--) av_log(log_ctx, log_level, " ");
|
|
av_log(log_ctx, log_level, "|\n");
|
|
}
|
|
}
|
|
|
|
void sws_freeVec(SwsVector *a)
|
|
{
|
|
if (!a) return;
|
|
av_freep(&a->coeff);
|
|
a->length=0;
|
|
av_free(a);
|
|
}
|
|
|
|
void sws_freeFilter(SwsFilter *filter)
|
|
{
|
|
if (!filter) return;
|
|
|
|
if (filter->lumH) sws_freeVec(filter->lumH);
|
|
if (filter->lumV) sws_freeVec(filter->lumV);
|
|
if (filter->chrH) sws_freeVec(filter->chrH);
|
|
if (filter->chrV) sws_freeVec(filter->chrV);
|
|
av_free(filter);
|
|
}
|
|
|
|
void sws_freeContext(SwsContext *c)
|
|
{
|
|
int i;
|
|
if (!c) return;
|
|
|
|
if (c->lumPixBuf) {
|
|
for (i=0; i<c->vLumBufSize; i++)
|
|
av_freep(&c->lumPixBuf[i]);
|
|
av_freep(&c->lumPixBuf);
|
|
}
|
|
|
|
if (c->chrUPixBuf) {
|
|
for (i=0; i<c->vChrBufSize; i++)
|
|
av_freep(&c->chrUPixBuf[i]);
|
|
av_freep(&c->chrUPixBuf);
|
|
av_freep(&c->chrVPixBuf);
|
|
}
|
|
|
|
if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {
|
|
for (i=0; i<c->vLumBufSize; i++)
|
|
av_freep(&c->alpPixBuf[i]);
|
|
av_freep(&c->alpPixBuf);
|
|
}
|
|
|
|
av_freep(&c->vLumFilter);
|
|
av_freep(&c->vChrFilter);
|
|
av_freep(&c->hLumFilter);
|
|
av_freep(&c->hChrFilter);
|
|
#if HAVE_ALTIVEC
|
|
av_freep(&c->vYCoeffsBank);
|
|
av_freep(&c->vCCoeffsBank);
|
|
#endif
|
|
|
|
av_freep(&c->vLumFilterPos);
|
|
av_freep(&c->vChrFilterPos);
|
|
av_freep(&c->hLumFilterPos);
|
|
av_freep(&c->hChrFilterPos);
|
|
|
|
#if HAVE_MMX
|
|
#ifdef MAP_ANONYMOUS
|
|
if (c->lumMmx2FilterCode) munmap(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize);
|
|
if (c->chrMmx2FilterCode) munmap(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize);
|
|
#elif HAVE_VIRTUALALLOC
|
|
if (c->lumMmx2FilterCode) VirtualFree(c->lumMmx2FilterCode, 0, MEM_RELEASE);
|
|
if (c->chrMmx2FilterCode) VirtualFree(c->chrMmx2FilterCode, 0, MEM_RELEASE);
|
|
#else
|
|
av_free(c->lumMmx2FilterCode);
|
|
av_free(c->chrMmx2FilterCode);
|
|
#endif
|
|
c->lumMmx2FilterCode=NULL;
|
|
c->chrMmx2FilterCode=NULL;
|
|
#endif /* HAVE_MMX */
|
|
|
|
av_freep(&c->yuvTable);
|
|
av_free(c->formatConvBuffer);
|
|
|
|
av_free(c);
|
|
}
|
|
|
|
struct SwsContext *sws_getCachedContext(struct SwsContext *context,
|
|
int srcW, int srcH, enum PixelFormat srcFormat,
|
|
int dstW, int dstH, enum PixelFormat dstFormat, int flags,
|
|
SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
|
|
{
|
|
static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};
|
|
|
|
if (!param)
|
|
param = default_param;
|
|
|
|
if (context &&
|
|
(context->srcW != srcW ||
|
|
context->srcH != srcH ||
|
|
context->srcFormat != srcFormat ||
|
|
context->dstW != dstW ||
|
|
context->dstH != dstH ||
|
|
context->dstFormat != dstFormat ||
|
|
context->flags != flags ||
|
|
context->param[0] != param[0] ||
|
|
context->param[1] != param[1])) {
|
|
sws_freeContext(context);
|
|
context = NULL;
|
|
}
|
|
|
|
if (!context) {
|
|
if (!(context = sws_alloc_context()))
|
|
return NULL;
|
|
context->srcW = srcW;
|
|
context->srcH = srcH;
|
|
context->srcRange = handle_jpeg(&srcFormat);
|
|
context->srcFormat = srcFormat;
|
|
context->dstW = dstW;
|
|
context->dstH = dstH;
|
|
context->dstRange = handle_jpeg(&dstFormat);
|
|
context->dstFormat = dstFormat;
|
|
context->flags = flags;
|
|
context->param[0] = param[0];
|
|
context->param[1] = param[1];
|
|
sws_setColorspaceDetails(context, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], context->srcRange, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, context->dstRange, 0, 1<<16, 1<<16);
|
|
if (sws_init_context(context, srcFilter, dstFilter) < 0) {
|
|
sws_freeContext(context);
|
|
return NULL;
|
|
}
|
|
}
|
|
return context;
|
|
}
|
|
|