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2012 lines
72 KiB
2012 lines
72 KiB
/* |
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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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#include "config.h" |
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#define _SVID_SOURCE // needed for MAP_ANONYMOUS |
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#define _DARWIN_C_SOURCE // needed for MAP_ANON |
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#include <inttypes.h> |
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#include <math.h> |
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#include <stdio.h> |
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#include <string.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 "libavutil/attributes.h" |
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#include "libavutil/avassert.h" |
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#include "libavutil/avutil.h" |
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#include "libavutil/bswap.h" |
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#include "libavutil/cpu.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/mathematics.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "libavutil/ppc/cpu.h" |
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#include "libavutil/x86/asm.h" |
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#include "libavutil/x86/cpu.h" |
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#include "rgb2rgb.h" |
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#include "swscale.h" |
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#include "swscale_internal.h" |
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static void handle_formats(SwsContext *c); |
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unsigned swscale_version(void) |
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{ |
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av_assert0(LIBSWSCALE_VERSION_MICRO >= 100); |
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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 FFMPEG_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 FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1; |
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} |
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typedef struct FormatEntry { |
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uint8_t is_supported_in :1; |
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uint8_t is_supported_out :1; |
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uint8_t is_supported_endianness :1; |
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} FormatEntry; |
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static const FormatEntry format_entries[AV_PIX_FMT_NB] = { |
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[AV_PIX_FMT_YUV420P] = { 1, 1 }, |
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[AV_PIX_FMT_YUYV422] = { 1, 1 }, |
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[AV_PIX_FMT_RGB24] = { 1, 1 }, |
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[AV_PIX_FMT_BGR24] = { 1, 1 }, |
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[AV_PIX_FMT_YUV422P] = { 1, 1 }, |
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[AV_PIX_FMT_YUV444P] = { 1, 1 }, |
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[AV_PIX_FMT_YUV410P] = { 1, 1 }, |
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[AV_PIX_FMT_YUV411P] = { 1, 1 }, |
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[AV_PIX_FMT_GRAY8] = { 1, 1 }, |
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[AV_PIX_FMT_MONOWHITE] = { 1, 1 }, |
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[AV_PIX_FMT_MONOBLACK] = { 1, 1 }, |
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[AV_PIX_FMT_PAL8] = { 1, 0 }, |
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[AV_PIX_FMT_YUVJ420P] = { 1, 1 }, |
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[AV_PIX_FMT_YUVJ411P] = { 1, 1 }, |
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[AV_PIX_FMT_YUVJ422P] = { 1, 1 }, |
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[AV_PIX_FMT_YUVJ444P] = { 1, 1 }, |
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[AV_PIX_FMT_YVYU422] = { 1, 1 }, |
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[AV_PIX_FMT_UYVY422] = { 1, 1 }, |
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[AV_PIX_FMT_UYYVYY411] = { 0, 0 }, |
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[AV_PIX_FMT_BGR8] = { 1, 1 }, |
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[AV_PIX_FMT_BGR4] = { 0, 1 }, |
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[AV_PIX_FMT_BGR4_BYTE] = { 1, 1 }, |
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[AV_PIX_FMT_RGB8] = { 1, 1 }, |
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[AV_PIX_FMT_RGB4] = { 0, 1 }, |
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[AV_PIX_FMT_RGB4_BYTE] = { 1, 1 }, |
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[AV_PIX_FMT_NV12] = { 1, 1 }, |
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[AV_PIX_FMT_NV21] = { 1, 1 }, |
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[AV_PIX_FMT_ARGB] = { 1, 1 }, |
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[AV_PIX_FMT_RGBA] = { 1, 1 }, |
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[AV_PIX_FMT_ABGR] = { 1, 1 }, |
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[AV_PIX_FMT_BGRA] = { 1, 1 }, |
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[AV_PIX_FMT_0RGB] = { 1, 1 }, |
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[AV_PIX_FMT_RGB0] = { 1, 1 }, |
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[AV_PIX_FMT_0BGR] = { 1, 1 }, |
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[AV_PIX_FMT_BGR0] = { 1, 1 }, |
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[AV_PIX_FMT_GRAY16BE] = { 1, 1 }, |
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[AV_PIX_FMT_GRAY16LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV440P] = { 1, 1 }, |
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[AV_PIX_FMT_YUVJ440P] = { 1, 1 }, |
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[AV_PIX_FMT_YUVA420P] = { 1, 1 }, |
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[AV_PIX_FMT_YUVA422P] = { 1, 1 }, |
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[AV_PIX_FMT_YUVA444P] = { 1, 1 }, |
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[AV_PIX_FMT_YUVA420P9BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUVA420P9LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUVA422P9BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUVA422P9LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUVA444P9BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUVA444P9LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUVA420P10BE]= { 1, 1 }, |
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[AV_PIX_FMT_YUVA420P10LE]= { 1, 1 }, |
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[AV_PIX_FMT_YUVA422P10BE]= { 1, 1 }, |
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[AV_PIX_FMT_YUVA422P10LE]= { 1, 1 }, |
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[AV_PIX_FMT_YUVA444P10BE]= { 1, 1 }, |
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[AV_PIX_FMT_YUVA444P10LE]= { 1, 1 }, |
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[AV_PIX_FMT_YUVA420P16BE]= { 1, 1 }, |
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[AV_PIX_FMT_YUVA420P16LE]= { 1, 1 }, |
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[AV_PIX_FMT_YUVA422P16BE]= { 1, 1 }, |
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[AV_PIX_FMT_YUVA422P16LE]= { 1, 1 }, |
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[AV_PIX_FMT_YUVA444P16BE]= { 1, 1 }, |
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[AV_PIX_FMT_YUVA444P16LE]= { 1, 1 }, |
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[AV_PIX_FMT_RGB48BE] = { 1, 1 }, |
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[AV_PIX_FMT_RGB48LE] = { 1, 1 }, |
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[AV_PIX_FMT_RGBA64BE] = { 1, 1, 1 }, |
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[AV_PIX_FMT_RGBA64LE] = { 1, 1, 1 }, |
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[AV_PIX_FMT_RGB565BE] = { 1, 1 }, |
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[AV_PIX_FMT_RGB565LE] = { 1, 1 }, |
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[AV_PIX_FMT_RGB555BE] = { 1, 1 }, |
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[AV_PIX_FMT_RGB555LE] = { 1, 1 }, |
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[AV_PIX_FMT_BGR565BE] = { 1, 1 }, |
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[AV_PIX_FMT_BGR565LE] = { 1, 1 }, |
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[AV_PIX_FMT_BGR555BE] = { 1, 1 }, |
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[AV_PIX_FMT_BGR555LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV420P16LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV420P16BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV422P16LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV422P16BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV444P16LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV444P16BE] = { 1, 1 }, |
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[AV_PIX_FMT_RGB444LE] = { 1, 1 }, |
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[AV_PIX_FMT_RGB444BE] = { 1, 1 }, |
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[AV_PIX_FMT_BGR444LE] = { 1, 1 }, |
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[AV_PIX_FMT_BGR444BE] = { 1, 1 }, |
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[AV_PIX_FMT_YA8] = { 1, 0 }, |
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[AV_PIX_FMT_YA16BE] = { 1, 0 }, |
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[AV_PIX_FMT_YA16LE] = { 1, 0 }, |
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[AV_PIX_FMT_BGR48BE] = { 1, 1 }, |
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[AV_PIX_FMT_BGR48LE] = { 1, 1 }, |
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[AV_PIX_FMT_BGRA64BE] = { 1, 1, 1 }, |
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[AV_PIX_FMT_BGRA64LE] = { 1, 1, 1 }, |
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[AV_PIX_FMT_YUV420P9BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV420P9LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV420P10BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV420P10LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV420P12BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV420P12LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV420P14BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV420P14LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV422P9BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV422P9LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV422P10BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV422P10LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV422P12BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV422P12LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV422P14BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV422P14LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV444P9BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV444P9LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV444P10BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV444P10LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV444P12BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV444P12LE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV444P14BE] = { 1, 1 }, |
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[AV_PIX_FMT_YUV444P14LE] = { 1, 1 }, |
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[AV_PIX_FMT_GBRP] = { 1, 1 }, |
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[AV_PIX_FMT_GBRP9LE] = { 1, 1 }, |
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[AV_PIX_FMT_GBRP9BE] = { 1, 1 }, |
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[AV_PIX_FMT_GBRP10LE] = { 1, 1 }, |
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[AV_PIX_FMT_GBRP10BE] = { 1, 1 }, |
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[AV_PIX_FMT_GBRP12LE] = { 1, 1 }, |
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[AV_PIX_FMT_GBRP12BE] = { 1, 1 }, |
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[AV_PIX_FMT_GBRP14LE] = { 1, 1 }, |
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[AV_PIX_FMT_GBRP14BE] = { 1, 1 }, |
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[AV_PIX_FMT_GBRP16LE] = { 1, 0 }, |
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[AV_PIX_FMT_GBRP16BE] = { 1, 0 }, |
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[AV_PIX_FMT_GBRAP] = { 1, 1 }, |
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[AV_PIX_FMT_GBRAP16LE] = { 1, 0 }, |
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[AV_PIX_FMT_GBRAP16BE] = { 1, 0 }, |
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[AV_PIX_FMT_BAYER_BGGR8] = { 1, 0 }, |
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[AV_PIX_FMT_BAYER_RGGB8] = { 1, 0 }, |
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[AV_PIX_FMT_BAYER_GBRG8] = { 1, 0 }, |
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[AV_PIX_FMT_BAYER_GRBG8] = { 1, 0 }, |
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[AV_PIX_FMT_BAYER_BGGR16LE] = { 1, 0 }, |
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[AV_PIX_FMT_BAYER_BGGR16BE] = { 1, 0 }, |
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[AV_PIX_FMT_BAYER_RGGB16LE] = { 1, 0 }, |
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[AV_PIX_FMT_BAYER_RGGB16BE] = { 1, 0 }, |
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[AV_PIX_FMT_BAYER_GBRG16LE] = { 1, 0 }, |
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[AV_PIX_FMT_BAYER_GBRG16BE] = { 1, 0 }, |
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[AV_PIX_FMT_BAYER_GRBG16LE] = { 1, 0 }, |
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[AV_PIX_FMT_BAYER_GRBG16BE] = { 1, 0 }, |
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[AV_PIX_FMT_XYZ12BE] = { 1, 1, 1 }, |
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[AV_PIX_FMT_XYZ12LE] = { 1, 1, 1 }, |
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}; |
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int sws_isSupportedInput(enum AVPixelFormat pix_fmt) |
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{ |
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return (unsigned)pix_fmt < AV_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 AVPixelFormat pix_fmt) |
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{ |
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return (unsigned)pix_fmt < AV_PIX_FMT_NB ? |
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format_entries[pix_fmt].is_supported_out : 0; |
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} |
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int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt) |
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{ |
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return (unsigned)pix_fmt < AV_PIX_FMT_NB ? |
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format_entries[pix_fmt].is_supported_endianness : 0; |
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} |
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static double getSplineCoeff(double a, double b, double c, double d, |
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double dist) |
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{ |
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if (dist <= 1.0) |
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return ((d * dist + c) * dist + b) * dist + a; |
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else |
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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 av_cold int get_local_pos(SwsContext *s, int chr_subsample, int pos, int dir) |
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{ |
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if (pos == -1 || pos <= -513) { |
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pos = (128 << chr_subsample) - 128; |
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} |
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pos += 128; // relative to ideal left edge |
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return pos >> chr_subsample; |
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} |
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typedef struct { |
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int flag; ///< flag associated to the algorithm |
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const char *description; ///< human-readable description |
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int size_factor; ///< size factor used when initing the filters |
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} ScaleAlgorithm; |
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static const ScaleAlgorithm scale_algorithms[] = { |
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{ SWS_AREA, "area averaging", 1 /* downscale only, for upscale it is bilinear */ }, |
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{ SWS_BICUBIC, "bicubic", 4 }, |
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{ SWS_BICUBLIN, "luma bicubic / chroma bilinear", -1 }, |
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{ SWS_BILINEAR, "bilinear", 2 }, |
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{ SWS_FAST_BILINEAR, "fast bilinear", -1 }, |
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{ SWS_GAUSS, "Gaussian", 8 /* infinite ;) */ }, |
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{ SWS_LANCZOS, "Lanczos", -1 /* custom */ }, |
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{ SWS_POINT, "nearest neighbor / point", -1 }, |
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{ SWS_SINC, "sinc", 20 /* infinite ;) */ }, |
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{ SWS_SPLINE, "bicubic spline", 20 /* infinite :)*/ }, |
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{ SWS_X, "experimental", 8 }, |
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}; |
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static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos, |
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int *outFilterSize, int xInc, int srcW, |
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int dstW, int filterAlign, int one, |
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int flags, int cpu_flags, |
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SwsVector *srcFilter, SwsVector *dstFilter, |
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double param[2], int srcPos, int dstPos) |
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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 - FFMIN(av_log2(srcW/dstW), 8)); |
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int ret = -1; |
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emms_c(); // FIXME should not be required but 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_ARRAY_OR_GOTO(NULL, *filterPos, (dstW + 3), sizeof(**filterPos), fail); |
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if (FFABS(xInc - 0x10000) < 10 && srcPos == dstPos) { // unscaled |
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int i; |
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filterSize = 1; |
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FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter, |
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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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int64_t xDstInSrc; |
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filterSize = 1; |
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FF_ALLOC_ARRAY_OR_GOTO(NULL, filter, |
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dstW, sizeof(*filter) * filterSize, fail); |
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xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7); |
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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)) || |
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(flags & SWS_FAST_BILINEAR)) { // bilinear upscale |
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int i; |
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int64_t xDstInSrc; |
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filterSize = 2; |
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FF_ALLOC_ARRAY_OR_GOTO(NULL, filter, |
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dstW, sizeof(*filter) * filterSize, fail); |
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xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7); |
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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(((int64_t)xx<<16) - xDstInSrc)*(fone>>16); |
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if (coeff < 0) |
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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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int64_t xDstInSrc; |
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int sizeFactor = -1; |
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for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) { |
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if (flags & scale_algorithms[i].flag && scale_algorithms[i].size_factor > 0) { |
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sizeFactor = scale_algorithms[i].size_factor; |
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break; |
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} |
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} |
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if (flags & SWS_LANCZOS) |
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sizeFactor = param[0] != SWS_PARAM_DEFAULT ? ceil(2 * param[0]) : 6; |
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av_assert0(sizeFactor > 0); |
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if (xInc <= 1 << 16) |
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filterSize = 1 + sizeFactor; // upscale |
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else |
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filterSize = 1 + (sizeFactor * srcW + dstW - 1) / dstW; |
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filterSize = FFMIN(filterSize, srcW - 2); |
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filterSize = FFMAX(filterSize, 1); |
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FF_ALLOC_ARRAY_OR_GOTO(NULL, filter, |
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dstW, sizeof(*filter) * filterSize, fail); |
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xDstInSrc = ((dstPos*(int64_t)xInc)>>7) - ((srcPos*0x10000LL)>>7); |
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for (i = 0; i < dstW; i++) { |
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int xx = (xDstInSrc - ((int64_t)(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 = (FFABS(((int64_t)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 + |
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(-18 * (1 << 24) + 12 * B + 6 * C) * dd + |
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(6 * (1 << 24) - 2 * B) * (1 << 30); |
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else |
|
coeff = (-B - 6 * C) * ddd + |
|
(6 * B + 30 * C) * dd + |
|
(-12 * B - 48 * C) * d + |
|
(8 * B + 24 * C) * (1 << 30); |
|
} |
|
coeff /= (1LL<<54)/fone; |
|
} |
|
#if 0 |
|
else if (flags & SWS_X) { |
|
double p = param ? param * 0.01 : 0.3; |
|
coeff = d ? sin(d * M_PI) / (d * M_PI) : 1.0; |
|
coeff *= pow(2.0, -p * d * d); |
|
} |
|
#endif |
|
else if (flags & SWS_X) { |
|
double A = param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0; |
|
double c; |
|
|
|
if (floatd < 1.0) |
|
c = cos(floatd * M_PI); |
|
else |
|
c = -1.0; |
|
if (c < 0.0) |
|
c = -pow(-c, A); |
|
else |
|
c = pow(c, A); |
|
coeff = (c * 0.5 + 0.5) * fone; |
|
} else if (flags & SWS_AREA) { |
|
int64_t d2 = d - (1 << 29); |
|
if (d2 * xInc < -(1LL << (29 + 16))) |
|
coeff = 1.0 * (1LL << (30 + 16)); |
|
else if (d2 * xInc < (1LL << (29 + 16))) |
|
coeff = -d2 * xInc + (1LL << (29 + 16)); |
|
else |
|
coeff = 0.0; |
|
coeff *= fone >> (30 + 16); |
|
} else if (flags & SWS_GAUSS) { |
|
double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0; |
|
coeff = (pow(2.0, -p * floatd * floatd)) * fone; |
|
} else if (flags & SWS_SINC) { |
|
coeff = (d ? sin(floatd * M_PI) / (floatd * M_PI) : 1.0) * fone; |
|
} else if (flags & SWS_LANCZOS) { |
|
double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0; |
|
coeff = (d ? sin(floatd * M_PI) * sin(floatd * M_PI / p) / |
|
(floatd * floatd * M_PI * M_PI / p) : 1.0) * fone; |
|
if (floatd > p) |
|
coeff = 0; |
|
} else if (flags & SWS_BILINEAR) { |
|
coeff = (1 << 30) - d; |
|
if (coeff < 0) |
|
coeff = 0; |
|
coeff *= fone >> 30; |
|
} else if (flags & SWS_SPLINE) { |
|
double p = -2.196152422706632; |
|
coeff = getSplineCoeff(1.0, 0.0, p, -p - 1.0, floatd) * fone; |
|
} else { |
|
av_assert0(0); |
|
} |
|
|
|
filter[i * filterSize + j] = coeff; |
|
xx++; |
|
} |
|
xDstInSrc += 2 * xInc; |
|
} |
|
} |
|
|
|
/* apply src & dst Filter to filter -> filter2 |
|
* av_free(filter); |
|
*/ |
|
av_assert0(filterSize > 0); |
|
filter2Size = filterSize; |
|
if (srcFilter) |
|
filter2Size += srcFilter->length - 1; |
|
if (dstFilter) |
|
filter2Size += dstFilter->length - 1; |
|
av_assert0(filter2Size > 0); |
|
FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter2, dstW, filter2Size * sizeof(*filter2), fail); |
|
|
|
for (i = 0; i < dstW; i++) { |
|
int j, k; |
|
|
|
if (srcFilter) { |
|
for (k = 0; k < srcFilter->length; k++) { |
|
for (j = 0; j < filterSize; j++) |
|
filter2[i * filter2Size + k + j] += |
|
srcFilter->coeff[k] * filter[i * filterSize + j]; |
|
} |
|
} else { |
|
for (j = 0; j < filterSize; j++) |
|
filter2[i * filter2Size + j] = filter[i * filterSize + j]; |
|
} |
|
// FIXME dstFilter |
|
|
|
(*filterPos)[i] += (filterSize - 1) / 2 - (filter2Size - 1) / 2; |
|
} |
|
av_freep(&filter); |
|
|
|
/* try to reduce the filter-size (step1 find size and shift left) */ |
|
// Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not). |
|
minFilterSize = 0; |
|
for (i = dstW - 1; i >= 0; i--) { |
|
int min = filter2Size; |
|
int j; |
|
int64_t cutOff = 0.0; |
|
|
|
/* get rid of near zero elements on the left by shifting left */ |
|
for (j = 0; j < filter2Size; j++) { |
|
int k; |
|
cutOff += FFABS(filter2[i * filter2Size]); |
|
|
|
if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone) |
|
break; |
|
|
|
/* preserve monotonicity because the core can't handle the |
|
* filter otherwise */ |
|
if (i < dstW - 1 && (*filterPos)[i] >= (*filterPos)[i + 1]) |
|
break; |
|
|
|
// move filter coefficients left |
|
for (k = 1; k < filter2Size; k++) |
|
filter2[i * filter2Size + k - 1] = filter2[i * filter2Size + k]; |
|
filter2[i * filter2Size + k - 1] = 0; |
|
(*filterPos)[i]++; |
|
} |
|
|
|
cutOff = 0; |
|
/* 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 (PPC_ALTIVEC(cpu_flags)) { |
|
// we can handle the special case 4, so we don't want to go 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; |
|
} |
|
|
|
av_assert0(minFilterSize > 0); |
|
filterSize = (minFilterSize + (filterAlign - 1)) & (~(filterAlign - 1)); |
|
av_assert0(filterSize > 0); |
|
filter = av_malloc_array(dstW, filterSize * sizeof(*filter)); |
|
if (!filter) |
|
goto fail; |
|
if (filterSize >= MAX_FILTER_SIZE * 16 / |
|
((flags & SWS_ACCURATE_RND) ? APCK_SIZE : 16)) { |
|
ret = RETCODE_USE_CASCADE; |
|
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_ARRAY_OR_GOTO(NULL, *outFilter, |
|
(dstW + 3), *outFilterSize * 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; |
|
if (!sum) { |
|
av_log(NULL, AV_LOG_WARNING, "SwScaler: zero vector in scaling\n"); |
|
sum = 1; |
|
} |
|
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: |
|
if(ret < 0) |
|
av_log(NULL, ret == RETCODE_USE_CASCADE ? AV_LOG_DEBUG : AV_LOG_ERROR, "sws: initFilter failed\n"); |
|
av_free(filter); |
|
av_free(filter2); |
|
return ret; |
|
} |
|
|
|
static void fill_rgb2yuv_table(SwsContext *c, const int table[4], int dstRange) |
|
{ |
|
int64_t W, V, Z, Cy, Cu, Cv; |
|
int64_t vr = table[0]; |
|
int64_t ub = table[1]; |
|
int64_t ug = -table[2]; |
|
int64_t vg = -table[3]; |
|
int64_t ONE = 65536; |
|
int64_t cy = ONE; |
|
uint8_t *p = (uint8_t*)c->input_rgb2yuv_table; |
|
int i; |
|
static const int8_t map[] = { |
|
BY_IDX, GY_IDX, -1 , BY_IDX, BY_IDX, GY_IDX, -1 , BY_IDX, |
|
RY_IDX, -1 , GY_IDX, RY_IDX, RY_IDX, -1 , GY_IDX, RY_IDX, |
|
RY_IDX, GY_IDX, -1 , RY_IDX, RY_IDX, GY_IDX, -1 , RY_IDX, |
|
BY_IDX, -1 , GY_IDX, BY_IDX, BY_IDX, -1 , GY_IDX, BY_IDX, |
|
BU_IDX, GU_IDX, -1 , BU_IDX, BU_IDX, GU_IDX, -1 , BU_IDX, |
|
RU_IDX, -1 , GU_IDX, RU_IDX, RU_IDX, -1 , GU_IDX, RU_IDX, |
|
RU_IDX, GU_IDX, -1 , RU_IDX, RU_IDX, GU_IDX, -1 , RU_IDX, |
|
BU_IDX, -1 , GU_IDX, BU_IDX, BU_IDX, -1 , GU_IDX, BU_IDX, |
|
BV_IDX, GV_IDX, -1 , BV_IDX, BV_IDX, GV_IDX, -1 , BV_IDX, |
|
RV_IDX, -1 , GV_IDX, RV_IDX, RV_IDX, -1 , GV_IDX, RV_IDX, |
|
RV_IDX, GV_IDX, -1 , RV_IDX, RV_IDX, GV_IDX, -1 , RV_IDX, |
|
BV_IDX, -1 , GV_IDX, BV_IDX, BV_IDX, -1 , GV_IDX, BV_IDX, |
|
RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, |
|
BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, |
|
GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , |
|
-1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, |
|
RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, |
|
BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, |
|
GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , |
|
-1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, |
|
RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, |
|
BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, |
|
GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , |
|
-1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, //23 |
|
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //24 |
|
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //25 |
|
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //26 |
|
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //27 |
|
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //28 |
|
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //29 |
|
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //30 |
|
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //31 |
|
BY_IDX, GY_IDX, RY_IDX, -1 , -1 , -1 , -1 , -1 , //32 |
|
BU_IDX, GU_IDX, RU_IDX, -1 , -1 , -1 , -1 , -1 , //33 |
|
BV_IDX, GV_IDX, RV_IDX, -1 , -1 , -1 , -1 , -1 , //34 |
|
}; |
|
|
|
dstRange = 0; //FIXME range = 1 is handled elsewhere |
|
|
|
if (!dstRange) { |
|
cy = cy * 255 / 219; |
|
} else { |
|
vr = vr * 224 / 255; |
|
ub = ub * 224 / 255; |
|
ug = ug * 224 / 255; |
|
vg = vg * 224 / 255; |
|
} |
|
W = ROUNDED_DIV(ONE*ONE*ug, ub); |
|
V = ROUNDED_DIV(ONE*ONE*vg, vr); |
|
Z = ONE*ONE-W-V; |
|
|
|
Cy = ROUNDED_DIV(cy*Z, ONE); |
|
Cu = ROUNDED_DIV(ub*Z, ONE); |
|
Cv = ROUNDED_DIV(vr*Z, ONE); |
|
|
|
c->input_rgb2yuv_table[RY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cy); |
|
c->input_rgb2yuv_table[GY_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cy); |
|
c->input_rgb2yuv_table[BY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cy); |
|
|
|
c->input_rgb2yuv_table[RU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cu); |
|
c->input_rgb2yuv_table[GU_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cu); |
|
c->input_rgb2yuv_table[BU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(Z+W) , Cu); |
|
|
|
c->input_rgb2yuv_table[RV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(V+Z) , Cv); |
|
c->input_rgb2yuv_table[GV_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cv); |
|
c->input_rgb2yuv_table[BV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cv); |
|
|
|
if(/*!dstRange && */!memcmp(table, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], sizeof(ff_yuv2rgb_coeffs[SWS_CS_DEFAULT]))) { |
|
c->input_rgb2yuv_table[BY_IDX] = ((int)(0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)); |
|
c->input_rgb2yuv_table[BV_IDX] = (-(int)(0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)); |
|
c->input_rgb2yuv_table[BU_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)); |
|
c->input_rgb2yuv_table[GY_IDX] = ((int)(0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)); |
|
c->input_rgb2yuv_table[GV_IDX] = (-(int)(0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)); |
|
c->input_rgb2yuv_table[GU_IDX] = (-(int)(0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)); |
|
c->input_rgb2yuv_table[RY_IDX] = ((int)(0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)); |
|
c->input_rgb2yuv_table[RV_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)); |
|
c->input_rgb2yuv_table[RU_IDX] = (-(int)(0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)); |
|
} |
|
for(i=0; i<FF_ARRAY_ELEMS(map); i++) |
|
AV_WL16(p + 16*4 + 2*i, map[i] >= 0 ? c->input_rgb2yuv_table[map[i]] : 0); |
|
} |
|
|
|
static void fill_xyztables(struct SwsContext *c) |
|
{ |
|
int i; |
|
double xyzgamma = XYZ_GAMMA; |
|
double rgbgamma = 1.0 / RGB_GAMMA; |
|
double xyzgammainv = 1.0 / XYZ_GAMMA; |
|
double rgbgammainv = RGB_GAMMA; |
|
static const int16_t xyz2rgb_matrix[3][4] = { |
|
{13270, -6295, -2041}, |
|
{-3969, 7682, 170}, |
|
{ 228, -835, 4329} }; |
|
static const int16_t rgb2xyz_matrix[3][4] = { |
|
{1689, 1464, 739}, |
|
{ 871, 2929, 296}, |
|
{ 79, 488, 3891} }; |
|
static int16_t xyzgamma_tab[4096], rgbgamma_tab[4096], xyzgammainv_tab[4096], rgbgammainv_tab[4096]; |
|
|
|
memcpy(c->xyz2rgb_matrix, xyz2rgb_matrix, sizeof(c->xyz2rgb_matrix)); |
|
memcpy(c->rgb2xyz_matrix, rgb2xyz_matrix, sizeof(c->rgb2xyz_matrix)); |
|
c->xyzgamma = xyzgamma_tab; |
|
c->rgbgamma = rgbgamma_tab; |
|
c->xyzgammainv = xyzgammainv_tab; |
|
c->rgbgammainv = rgbgammainv_tab; |
|
|
|
if (rgbgamma_tab[4095]) |
|
return; |
|
|
|
/* set gamma vectors */ |
|
for (i = 0; i < 4096; i++) { |
|
xyzgamma_tab[i] = lrint(pow(i / 4095.0, xyzgamma) * 4095.0); |
|
rgbgamma_tab[i] = lrint(pow(i / 4095.0, rgbgamma) * 4095.0); |
|
xyzgammainv_tab[i] = lrint(pow(i / 4095.0, xyzgammainv) * 4095.0); |
|
rgbgammainv_tab[i] = lrint(pow(i / 4095.0, rgbgammainv) * 4095.0); |
|
} |
|
} |
|
|
|
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) |
|
{ |
|
const AVPixFmtDescriptor *desc_dst; |
|
const AVPixFmtDescriptor *desc_src; |
|
int need_reinit = 0; |
|
memmove(c->srcColorspaceTable, inv_table, sizeof(int) * 4); |
|
memmove(c->dstColorspaceTable, table, sizeof(int) * 4); |
|
|
|
handle_formats(c); |
|
desc_dst = av_pix_fmt_desc_get(c->dstFormat); |
|
desc_src = av_pix_fmt_desc_get(c->srcFormat); |
|
|
|
if(!isYUV(c->dstFormat) && !isGray(c->dstFormat)) |
|
dstRange = 0; |
|
if(!isYUV(c->srcFormat) && !isGray(c->srcFormat)) |
|
srcRange = 0; |
|
|
|
c->brightness = brightness; |
|
c->contrast = contrast; |
|
c->saturation = saturation; |
|
if (c->srcRange != srcRange || c->dstRange != dstRange) |
|
need_reinit = 1; |
|
c->srcRange = srcRange; |
|
c->dstRange = dstRange; |
|
|
|
//The srcBpc check is possibly wrong but we seem to lack a definitive reference to test this |
|
//and what we have in ticket 2939 looks better with this check |
|
if (need_reinit && (c->srcBpc == 8 || !isYUV(c->srcFormat))) |
|
ff_sws_init_range_convert(c); |
|
|
|
if ((isYUV(c->dstFormat) || isGray(c->dstFormat)) && (isYUV(c->srcFormat) || isGray(c->srcFormat))) |
|
return -1; |
|
|
|
c->dstFormatBpp = av_get_bits_per_pixel(desc_dst); |
|
c->srcFormatBpp = av_get_bits_per_pixel(desc_src); |
|
|
|
if (!isYUV(c->dstFormat) && !isGray(c->dstFormat)) { |
|
ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, |
|
contrast, saturation); |
|
// FIXME factorize |
|
|
|
if (ARCH_PPC) |
|
ff_yuv2rgb_init_tables_ppc(c, inv_table, brightness, |
|
contrast, saturation); |
|
} |
|
|
|
fill_rgb2yuv_table(c, table, dstRange); |
|
|
|
return 0; |
|
} |
|
|
|
int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, |
|
int *srcRange, int **table, int *dstRange, |
|
int *brightness, int *contrast, int *saturation) |
|
{ |
|
if (!c ) |
|
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 AVPixelFormat *format) |
|
{ |
|
switch (*format) { |
|
case AV_PIX_FMT_YUVJ420P: |
|
*format = AV_PIX_FMT_YUV420P; |
|
return 1; |
|
case AV_PIX_FMT_YUVJ411P: |
|
*format = AV_PIX_FMT_YUV411P; |
|
return 1; |
|
case AV_PIX_FMT_YUVJ422P: |
|
*format = AV_PIX_FMT_YUV422P; |
|
return 1; |
|
case AV_PIX_FMT_YUVJ444P: |
|
*format = AV_PIX_FMT_YUV444P; |
|
return 1; |
|
case AV_PIX_FMT_YUVJ440P: |
|
*format = AV_PIX_FMT_YUV440P; |
|
return 1; |
|
case AV_PIX_FMT_GRAY8: |
|
case AV_PIX_FMT_GRAY16LE: |
|
case AV_PIX_FMT_GRAY16BE: |
|
return 1; |
|
default: |
|
return 0; |
|
} |
|
} |
|
|
|
static int handle_0alpha(enum AVPixelFormat *format) |
|
{ |
|
switch (*format) { |
|
case AV_PIX_FMT_0BGR : *format = AV_PIX_FMT_ABGR ; return 1; |
|
case AV_PIX_FMT_BGR0 : *format = AV_PIX_FMT_BGRA ; return 4; |
|
case AV_PIX_FMT_0RGB : *format = AV_PIX_FMT_ARGB ; return 1; |
|
case AV_PIX_FMT_RGB0 : *format = AV_PIX_FMT_RGBA ; return 4; |
|
default: return 0; |
|
} |
|
} |
|
|
|
static int handle_xyz(enum AVPixelFormat *format) |
|
{ |
|
switch (*format) { |
|
case AV_PIX_FMT_XYZ12BE : *format = AV_PIX_FMT_RGB48BE; return 1; |
|
case AV_PIX_FMT_XYZ12LE : *format = AV_PIX_FMT_RGB48LE; return 1; |
|
default: return 0; |
|
} |
|
} |
|
|
|
static void handle_formats(SwsContext *c) |
|
{ |
|
c->src0Alpha |= handle_0alpha(&c->srcFormat); |
|
c->dst0Alpha |= handle_0alpha(&c->dstFormat); |
|
c->srcXYZ |= handle_xyz(&c->srcFormat); |
|
c->dstXYZ |= handle_xyz(&c->dstFormat); |
|
if (c->srcXYZ || c->dstXYZ) |
|
fill_xyztables(c); |
|
} |
|
|
|
SwsContext *sws_alloc_context(void) |
|
{ |
|
SwsContext *c = av_mallocz(sizeof(SwsContext)); |
|
|
|
av_assert0(offsetof(SwsContext, redDither) + DITHER32_INT == offsetof(SwsContext, dither32)); |
|
|
|
if (c) { |
|
c->av_class = &sws_context_class; |
|
av_opt_set_defaults(c); |
|
} |
|
|
|
return c; |
|
} |
|
|
|
av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter, |
|
SwsFilter *dstFilter) |
|
{ |
|
int i, j; |
|
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) + 66, 16); |
|
int flags, cpu_flags; |
|
enum AVPixelFormat srcFormat = c->srcFormat; |
|
enum AVPixelFormat dstFormat = c->dstFormat; |
|
const AVPixFmtDescriptor *desc_src; |
|
const AVPixFmtDescriptor *desc_dst; |
|
int ret = 0; |
|
|
|
cpu_flags = av_get_cpu_flags(); |
|
flags = c->flags; |
|
emms_c(); |
|
if (!rgb15to16) |
|
sws_rgb2rgb_init(); |
|
|
|
unscaled = (srcW == dstW && srcH == dstH); |
|
|
|
c->srcRange |= handle_jpeg(&c->srcFormat); |
|
c->dstRange |= handle_jpeg(&c->dstFormat); |
|
|
|
if(srcFormat!=c->srcFormat || dstFormat!=c->dstFormat) |
|
av_log(c, AV_LOG_WARNING, "deprecated pixel format used, make sure you did set range correctly\n"); |
|
|
|
if (!c->contrast && !c->saturation && !c->dstFormatBpp) |
|
sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], c->srcRange, |
|
ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], |
|
c->dstRange, 0, 1 << 16, 1 << 16); |
|
|
|
handle_formats(c); |
|
srcFormat = c->srcFormat; |
|
dstFormat = c->dstFormat; |
|
desc_src = av_pix_fmt_desc_get(srcFormat); |
|
desc_dst = av_pix_fmt_desc_get(dstFormat); |
|
|
|
if (!(unscaled && sws_isSupportedEndiannessConversion(srcFormat) && |
|
av_pix_fmt_swap_endianness(srcFormat) == dstFormat)) { |
|
if (!sws_isSupportedInput(srcFormat)) { |
|
av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n", |
|
av_get_pix_fmt_name(srcFormat)); |
|
return AVERROR(EINVAL); |
|
} |
|
if (!sws_isSupportedOutput(dstFormat)) { |
|
av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n", |
|
av_get_pix_fmt_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); |
|
|
|
/* provide a default scaler if not set by caller */ |
|
if (!i) { |
|
if (dstW < srcW && dstH < srcH) |
|
flags |= SWS_BICUBIC; |
|
else if (dstW > srcW && dstH > srcH) |
|
flags |= SWS_BICUBIC; |
|
else |
|
flags |= SWS_BICUBIC; |
|
c->flags = flags; |
|
} else if (i & (i - 1)) { |
|
av_log(c, AV_LOG_ERROR, |
|
"Exactly one scaler algorithm must be chosen, got %X\n", i); |
|
return AVERROR(EINVAL); |
|
} |
|
/* sanity check */ |
|
if (srcW < 1 || srcH < 1 || dstW < 1 || dstH < 1) { |
|
/* FIXME check if these are enough and try to lower 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 = (((int64_t)srcW << 16) + (dstW >> 1)) / dstW; |
|
c->lumYInc = (((int64_t)srcH << 16) + (dstH >> 1)) / dstH; |
|
c->dstFormatBpp = av_get_bits_per_pixel(desc_dst); |
|
c->srcFormatBpp = av_get_bits_per_pixel(desc_src); |
|
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); |
|
|
|
av_pix_fmt_get_chroma_sub_sample(srcFormat, &c->chrSrcHSubSample, &c->chrSrcVSubSample); |
|
av_pix_fmt_get_chroma_sub_sample(dstFormat, &c->chrDstHSubSample, &c->chrDstVSubSample); |
|
|
|
if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) { |
|
if (dstW&1) { |
|
av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to odd output size\n"); |
|
flags |= SWS_FULL_CHR_H_INT; |
|
c->flags = flags; |
|
} |
|
|
|
if ( c->chrSrcHSubSample == 0 |
|
&& c->chrSrcVSubSample == 0 |
|
&& c->dither != SWS_DITHER_BAYER //SWS_FULL_CHR_H_INT is currently not supported with SWS_DITHER_BAYER |
|
&& !(c->flags & SWS_FAST_BILINEAR) |
|
) { |
|
av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to input having non subsampled chroma\n"); |
|
flags |= SWS_FULL_CHR_H_INT; |
|
c->flags = flags; |
|
} |
|
} |
|
|
|
if (c->dither == SWS_DITHER_AUTO) { |
|
if (flags & SWS_ERROR_DIFFUSION) |
|
c->dither = SWS_DITHER_ED; |
|
} |
|
|
|
if(dstFormat == AV_PIX_FMT_BGR4_BYTE || |
|
dstFormat == AV_PIX_FMT_RGB4_BYTE || |
|
dstFormat == AV_PIX_FMT_BGR8 || |
|
dstFormat == AV_PIX_FMT_RGB8) { |
|
if (c->dither == SWS_DITHER_AUTO) |
|
c->dither = (flags & SWS_FULL_CHR_H_INT) ? SWS_DITHER_ED : SWS_DITHER_BAYER; |
|
if (!(flags & SWS_FULL_CHR_H_INT)) { |
|
if (c->dither == SWS_DITHER_ED || c->dither == SWS_DITHER_A_DITHER || c->dither == SWS_DITHER_X_DITHER) { |
|
av_log(c, AV_LOG_DEBUG, |
|
"Desired dithering only supported in full chroma interpolation for destination format '%s'\n", |
|
av_get_pix_fmt_name(dstFormat)); |
|
flags |= SWS_FULL_CHR_H_INT; |
|
c->flags = flags; |
|
} |
|
} |
|
if (flags & SWS_FULL_CHR_H_INT) { |
|
if (c->dither == SWS_DITHER_BAYER) { |
|
av_log(c, AV_LOG_DEBUG, |
|
"Ordered dither is not supported in full chroma interpolation for destination format '%s'\n", |
|
av_get_pix_fmt_name(dstFormat)); |
|
c->dither = SWS_DITHER_ED; |
|
} |
|
} |
|
} |
|
if (isPlanarRGB(dstFormat)) { |
|
if (!(flags & SWS_FULL_CHR_H_INT)) { |
|
av_log(c, AV_LOG_DEBUG, |
|
"%s output is not supported with half chroma resolution, switching to full\n", |
|
av_get_pix_fmt_name(dstFormat)); |
|
flags |= SWS_FULL_CHR_H_INT; |
|
c->flags = flags; |
|
} |
|
} |
|
|
|
/* reuse chroma for 2 pixels RGB/BGR unless user wants full |
|
* chroma interpolation */ |
|
if (flags & SWS_FULL_CHR_H_INT && |
|
isAnyRGB(dstFormat) && |
|
!isPlanarRGB(dstFormat) && |
|
dstFormat != AV_PIX_FMT_RGBA && |
|
dstFormat != AV_PIX_FMT_ARGB && |
|
dstFormat != AV_PIX_FMT_BGRA && |
|
dstFormat != AV_PIX_FMT_ABGR && |
|
dstFormat != AV_PIX_FMT_RGB24 && |
|
dstFormat != AV_PIX_FMT_BGR24 && |
|
dstFormat != AV_PIX_FMT_BGR4_BYTE && |
|
dstFormat != AV_PIX_FMT_RGB4_BYTE && |
|
dstFormat != AV_PIX_FMT_BGR8 && |
|
dstFormat != AV_PIX_FMT_RGB8 |
|
) { |
|
av_log(c, AV_LOG_WARNING, |
|
"full chroma interpolation for destination format '%s' not yet implemented\n", |
|
av_get_pix_fmt_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 != AV_PIX_FMT_RGB8 && srcFormat != AV_PIX_FMT_BGR8 && |
|
srcFormat != AV_PIX_FMT_RGB4 && srcFormat != AV_PIX_FMT_BGR4 && |
|
srcFormat != AV_PIX_FMT_RGB4_BYTE && srcFormat != AV_PIX_FMT_BGR4_BYTE && |
|
srcFormat != AV_PIX_FMT_GBRP9BE && srcFormat != AV_PIX_FMT_GBRP9LE && |
|
srcFormat != AV_PIX_FMT_GBRP10BE && srcFormat != AV_PIX_FMT_GBRP10LE && |
|
srcFormat != AV_PIX_FMT_GBRP12BE && srcFormat != AV_PIX_FMT_GBRP12LE && |
|
srcFormat != AV_PIX_FMT_GBRP14BE && srcFormat != AV_PIX_FMT_GBRP14LE && |
|
srcFormat != AV_PIX_FMT_GBRP16BE && srcFormat != AV_PIX_FMT_GBRP16LE && |
|
((dstW >> c->chrDstHSubSample) <= (srcW >> 1) || |
|
(flags & SWS_FAST_BILINEAR))) |
|
c->chrSrcHSubSample = 1; |
|
|
|
// Note the FF_CEIL_RSHIFT is so that we always round toward +inf. |
|
c->chrSrcW = FF_CEIL_RSHIFT(srcW, c->chrSrcHSubSample); |
|
c->chrSrcH = FF_CEIL_RSHIFT(srcH, c->chrSrcVSubSample); |
|
c->chrDstW = FF_CEIL_RSHIFT(dstW, c->chrDstHSubSample); |
|
c->chrDstH = FF_CEIL_RSHIFT(dstH, c->chrDstVSubSample); |
|
|
|
FF_ALLOC_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW*2+78, 16) * 2, fail); |
|
|
|
c->srcBpc = 1 + desc_src->comp[0].depth_minus1; |
|
if (c->srcBpc < 8) |
|
c->srcBpc = 8; |
|
c->dstBpc = 1 + desc_dst->comp[0].depth_minus1; |
|
if (c->dstBpc < 8) |
|
c->dstBpc = 8; |
|
if (isAnyRGB(srcFormat) || srcFormat == AV_PIX_FMT_PAL8) |
|
c->srcBpc = 16; |
|
if (c->dstBpc == 16) |
|
dst_stride <<= 1; |
|
|
|
if (INLINE_MMXEXT(cpu_flags) && c->srcBpc == 8 && c->dstBpc <= 14) { |
|
c->canMMXEXTBeUsed = dstW >= srcW && (dstW & 31) == 0 && |
|
c->chrDstW >= c->chrSrcW && |
|
(srcW & 15) == 0; |
|
if (!c->canMMXEXTBeUsed && dstW >= srcW && c->chrDstW >= c->chrSrcW && (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 MMXEXT scaler\n"); |
|
} |
|
if (usesHFilter || isNBPS(c->srcFormat) || is16BPS(c->srcFormat) || isAnyRGB(c->srcFormat)) |
|
c->canMMXEXTBeUsed = 0; |
|
} else |
|
c->canMMXEXTBeUsed = 0; |
|
|
|
c->chrXInc = (((int64_t)c->chrSrcW << 16) + (c->chrDstW >> 1)) / c->chrDstW; |
|
c->chrYInc = (((int64_t)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->canMMXEXTBeUsed) { |
|
c->lumXInc += 20; |
|
c->chrXInc += 20; |
|
} |
|
// we don't use the x86 asm scaler if MMX is available |
|
else if (INLINE_MMX(cpu_flags) && c->dstBpc <= 14) { |
|
c->lumXInc = ((int64_t)(srcW - 2) << 16) / (dstW - 2) - 20; |
|
c->chrXInc = ((int64_t)(c->chrSrcW - 2) << 16) / (c->chrDstW - 2) - 20; |
|
} |
|
} |
|
|
|
if (isBayer(srcFormat)) { |
|
if (!unscaled || |
|
(dstFormat != AV_PIX_FMT_RGB24 && dstFormat != AV_PIX_FMT_YUV420P)) { |
|
enum AVPixelFormat tmpFormat = AV_PIX_FMT_RGB24; |
|
|
|
ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride, |
|
srcW, srcH, tmpFormat, 64); |
|
if (ret < 0) |
|
return ret; |
|
|
|
c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat, |
|
srcW, srcH, tmpFormat, |
|
flags, srcFilter, NULL, c->param); |
|
if (!c->cascaded_context[0]) |
|
return -1; |
|
|
|
c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFormat, |
|
dstW, dstH, dstFormat, |
|
flags, NULL, dstFilter, c->param); |
|
if (!c->cascaded_context[1]) |
|
return -1; |
|
return 0; |
|
} |
|
} |
|
|
|
#define USE_MMAP (HAVE_MMAP && HAVE_MPROTECT && defined MAP_ANONYMOUS) |
|
|
|
/* precalculate horizontal scaler filter coefficients */ |
|
{ |
|
#if HAVE_MMXEXT_INLINE |
|
// can't downscale !!! |
|
if (c->canMMXEXTBeUsed && (flags & SWS_FAST_BILINEAR)) { |
|
c->lumMmxextFilterCodeSize = ff_init_hscaler_mmxext(dstW, c->lumXInc, NULL, |
|
NULL, NULL, 8); |
|
c->chrMmxextFilterCodeSize = ff_init_hscaler_mmxext(c->chrDstW, c->chrXInc, |
|
NULL, NULL, NULL, 4); |
|
|
|
#if USE_MMAP |
|
c->lumMmxextFilterCode = mmap(NULL, c->lumMmxextFilterCodeSize, |
|
PROT_READ | PROT_WRITE, |
|
MAP_PRIVATE | MAP_ANONYMOUS, |
|
-1, 0); |
|
c->chrMmxextFilterCode = mmap(NULL, c->chrMmxextFilterCodeSize, |
|
PROT_READ | PROT_WRITE, |
|
MAP_PRIVATE | MAP_ANONYMOUS, |
|
-1, 0); |
|
#elif HAVE_VIRTUALALLOC |
|
c->lumMmxextFilterCode = VirtualAlloc(NULL, |
|
c->lumMmxextFilterCodeSize, |
|
MEM_COMMIT, |
|
PAGE_EXECUTE_READWRITE); |
|
c->chrMmxextFilterCode = VirtualAlloc(NULL, |
|
c->chrMmxextFilterCodeSize, |
|
MEM_COMMIT, |
|
PAGE_EXECUTE_READWRITE); |
|
#else |
|
c->lumMmxextFilterCode = av_malloc(c->lumMmxextFilterCodeSize); |
|
c->chrMmxextFilterCode = av_malloc(c->chrMmxextFilterCodeSize); |
|
#endif |
|
|
|
#ifdef MAP_ANONYMOUS |
|
if (c->lumMmxextFilterCode == MAP_FAILED || c->chrMmxextFilterCode == MAP_FAILED) |
|
#else |
|
if (!c->lumMmxextFilterCode || !c->chrMmxextFilterCode) |
|
#endif |
|
{ |
|
av_log(c, AV_LOG_ERROR, "Failed to allocate MMX2FilterCode\n"); |
|
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); |
|
|
|
ff_init_hscaler_mmxext( dstW, c->lumXInc, c->lumMmxextFilterCode, |
|
c->hLumFilter, (uint32_t*)c->hLumFilterPos, 8); |
|
ff_init_hscaler_mmxext(c->chrDstW, c->chrXInc, c->chrMmxextFilterCode, |
|
c->hChrFilter, (uint32_t*)c->hChrFilterPos, 4); |
|
|
|
#if USE_MMAP |
|
if ( mprotect(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1 |
|
|| mprotect(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize, PROT_EXEC | PROT_READ) == -1) { |
|
av_log(c, AV_LOG_ERROR, "mprotect failed, cannot use fast bilinear scaler\n"); |
|
goto fail; |
|
} |
|
#endif |
|
} else |
|
#endif /* HAVE_MMXEXT_INLINE */ |
|
{ |
|
const int filterAlign = X86_MMX(cpu_flags) ? 4 : |
|
PPC_ALTIVEC(cpu_flags) ? 8 : 1; |
|
|
|
if ((ret = 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, |
|
get_local_pos(c, 0, 0, 0), |
|
get_local_pos(c, 0, 0, 0))) < 0) |
|
goto fail; |
|
if ((ret = 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, |
|
get_local_pos(c, c->chrSrcHSubSample, c->src_h_chr_pos, 0), |
|
get_local_pos(c, c->chrDstHSubSample, c->dst_h_chr_pos, 0))) < 0) |
|
goto fail; |
|
} |
|
} // initialize horizontal stuff |
|
|
|
/* precalculate vertical scaler filter coefficients */ |
|
{ |
|
const int filterAlign = X86_MMX(cpu_flags) ? 2 : |
|
PPC_ALTIVEC(cpu_flags) ? 8 : 1; |
|
|
|
if ((ret = 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, |
|
get_local_pos(c, 0, 0, 1), |
|
get_local_pos(c, 0, 0, 1))) < 0) |
|
goto fail; |
|
if ((ret = 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, |
|
get_local_pos(c, c->chrSrcVSubSample, c->src_v_chr_pos, 1), |
|
get_local_pos(c, c->chrDstVSubSample, c->dst_v_chr_pos, 1))) < 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 = (int64_t)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]; |
|
} |
|
|
|
for (i = 0; i < 4; i++) |
|
FF_ALLOCZ_OR_GOTO(c, c->dither_error[i], (c->dstW+2) * sizeof(int), fail); |
|
|
|
/* 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 * 3 * sizeof(int16_t *), fail); |
|
FF_ALLOC_OR_GOTO(c, c->chrUPixBuf, c->vChrBufSize * 3 * sizeof(int16_t *), fail); |
|
FF_ALLOC_OR_GOTO(c, c->chrVPixBuf, c->vChrBufSize * 3 * sizeof(int16_t *), fail); |
|
if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) |
|
FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize * 3 * sizeof(int16_t *), fail); |
|
/* Note we need at least one pixel more at the end because of the MMX code |
|
* (just in case someone wants to 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->scalingBpp is the same as 16 / sizeof(scaling_intermediate) |
|
c->uv_off = (dst_stride>>1) + 64 / (c->dstBpc &~ 7); |
|
c->uv_offx2 = 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++) |
|
if(desc_dst->comp[0].depth_minus1 == 15){ |
|
av_assert0(c->dstBpc > 14); |
|
for(j=0; j<dst_stride/2+1; j++) |
|
((int32_t*)(c->chrUPixBuf[i]))[j] = 1<<18; |
|
} else |
|
for(j=0; j<dst_stride+1; j++) |
|
((int16_t*)(c->chrUPixBuf[i]))[j] = 1<<14; |
|
|
|
av_assert0(c->chrDstH <= dstH); |
|
|
|
if (flags & SWS_PRINT_INFO) { |
|
const char *scaler = NULL, *cpucaps; |
|
|
|
for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) { |
|
if (flags & scale_algorithms[i].flag) { |
|
scaler = scale_algorithms[i].description; |
|
break; |
|
} |
|
} |
|
if (!scaler) |
|
scaler = "ehh flags invalid?!"; |
|
av_log(c, AV_LOG_INFO, "%s scaler, from %s to %s%s ", |
|
scaler, |
|
av_get_pix_fmt_name(srcFormat), |
|
#ifdef DITHER1XBPP |
|
dstFormat == AV_PIX_FMT_BGR555 || dstFormat == AV_PIX_FMT_BGR565 || |
|
dstFormat == AV_PIX_FMT_RGB444BE || dstFormat == AV_PIX_FMT_RGB444LE || |
|
dstFormat == AV_PIX_FMT_BGR444BE || dstFormat == AV_PIX_FMT_BGR444LE ? |
|
"dithered " : "", |
|
#else |
|
"", |
|
#endif |
|
av_get_pix_fmt_name(dstFormat)); |
|
|
|
if (INLINE_MMXEXT(cpu_flags)) |
|
cpucaps = "MMXEXT"; |
|
else if (INLINE_AMD3DNOW(cpu_flags)) |
|
cpucaps = "3DNOW"; |
|
else if (INLINE_MMX(cpu_flags)) |
|
cpucaps = "MMX"; |
|
else if (PPC_ALTIVEC(cpu_flags)) |
|
cpucaps = "AltiVec"; |
|
else |
|
cpucaps = "C"; |
|
|
|
av_log(c, AV_LOG_INFO, "using %s\n", cpucaps); |
|
|
|
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); |
|
} |
|
|
|
/* 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", |
|
av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat)); |
|
return 0; |
|
} |
|
} |
|
|
|
c->swscale = ff_getSwsFunc(c); |
|
return 0; |
|
fail: // FIXME replace things by appropriate error codes |
|
if (ret == RETCODE_USE_CASCADE) { |
|
int tmpW = sqrt(srcW * (int64_t)dstW); |
|
int tmpH = sqrt(srcH * (int64_t)dstH); |
|
enum AVPixelFormat tmpFormat = AV_PIX_FMT_YUV420P; |
|
|
|
if (srcW*(int64_t)srcH <= 4LL*dstW*dstH) |
|
return AVERROR(EINVAL); |
|
|
|
ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride, |
|
tmpW, tmpH, tmpFormat, 64); |
|
if (ret < 0) |
|
return ret; |
|
|
|
c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat, |
|
tmpW, tmpH, tmpFormat, |
|
flags, srcFilter, NULL, c->param); |
|
if (!c->cascaded_context[0]) |
|
return -1; |
|
|
|
c->cascaded_context[1] = sws_getContext(tmpW, tmpH, tmpFormat, |
|
dstW, dstH, dstFormat, |
|
flags, NULL, dstFilter, c->param); |
|
if (!c->cascaded_context[1]) |
|
return -1; |
|
return 0; |
|
} |
|
return -1; |
|
} |
|
|
|
SwsContext *sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat, |
|
int dstW, int dstH, enum AVPixelFormat 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->srcFormat = srcFormat; |
|
c->dstFormat = dstFormat; |
|
|
|
if (param) { |
|
c->param[0] = param[0]; |
|
c->param[1] = param[1]; |
|
} |
|
|
|
if (sws_init_context(c, srcFilter, dstFilter) < 0) { |
|
sws_freeContext(c); |
|
return NULL; |
|
} |
|
|
|
return c; |
|
} |
|
|
|
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; |
|
|
|
if(length <= 0 || length > INT_MAX/ sizeof(double)) |
|
return NULL; |
|
|
|
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; |
|
|
|
if(variance < 0 || quality < 0) |
|
return NULL; |
|
|
|
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) |
|
{ |
|
SwsVector *vec = sws_allocVec(a->length); |
|
|
|
if (!vec) |
|
return NULL; |
|
|
|
memcpy(vec->coeff, a->coeff, a->length * sizeof(*a->coeff)); |
|
|
|
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; |
|
|
|
sws_freeVec(filter->lumH); |
|
sws_freeVec(filter->lumV); |
|
sws_freeVec(filter->chrH); |
|
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); |
|
} |
|
|
|
for (i = 0; i < 4; i++) |
|
av_freep(&c->dither_error[i]); |
|
|
|
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_INLINE |
|
#if USE_MMAP |
|
if (c->lumMmxextFilterCode) |
|
munmap(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize); |
|
if (c->chrMmxextFilterCode) |
|
munmap(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize); |
|
#elif HAVE_VIRTUALALLOC |
|
if (c->lumMmxextFilterCode) |
|
VirtualFree(c->lumMmxextFilterCode, 0, MEM_RELEASE); |
|
if (c->chrMmxextFilterCode) |
|
VirtualFree(c->chrMmxextFilterCode, 0, MEM_RELEASE); |
|
#else |
|
av_free(c->lumMmxextFilterCode); |
|
av_free(c->chrMmxextFilterCode); |
|
#endif |
|
c->lumMmxextFilterCode = NULL; |
|
c->chrMmxextFilterCode = NULL; |
|
#endif /* HAVE_MMX_INLINE */ |
|
|
|
av_freep(&c->yuvTable); |
|
av_freep(&c->formatConvBuffer); |
|
|
|
sws_freeContext(c->cascaded_context[0]); |
|
sws_freeContext(c->cascaded_context[1]); |
|
memset(c->cascaded_context, 0, sizeof(c->cascaded_context)); |
|
av_freep(&c->cascaded_tmp[0]); |
|
|
|
av_free(c); |
|
} |
|
|
|
struct SwsContext *sws_getCachedContext(struct SwsContext *context, int srcW, |
|
int srcH, enum AVPixelFormat srcFormat, |
|
int dstW, int dstH, |
|
enum AVPixelFormat dstFormat, int flags, |
|
SwsFilter *srcFilter, |
|
SwsFilter *dstFilter, |
|
const double *param) |
|
{ |
|
static const double default_param[2] = { SWS_PARAM_DEFAULT, |
|
SWS_PARAM_DEFAULT }; |
|
int64_t src_h_chr_pos = -513, dst_h_chr_pos = -513, |
|
src_v_chr_pos = -513, dst_v_chr_pos = -513; |
|
|
|
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])) { |
|
|
|
av_opt_get_int(context, "src_h_chr_pos", 0, &src_h_chr_pos); |
|
av_opt_get_int(context, "src_v_chr_pos", 0, &src_v_chr_pos); |
|
av_opt_get_int(context, "dst_h_chr_pos", 0, &dst_h_chr_pos); |
|
av_opt_get_int(context, "dst_v_chr_pos", 0, &dst_v_chr_pos); |
|
sws_freeContext(context); |
|
context = NULL; |
|
} |
|
|
|
if (!context) { |
|
if (!(context = sws_alloc_context())) |
|
return NULL; |
|
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]; |
|
|
|
av_opt_set_int(context, "src_h_chr_pos", src_h_chr_pos, 0); |
|
av_opt_set_int(context, "src_v_chr_pos", src_v_chr_pos, 0); |
|
av_opt_set_int(context, "dst_h_chr_pos", dst_h_chr_pos, 0); |
|
av_opt_set_int(context, "dst_v_chr_pos", dst_v_chr_pos, 0); |
|
|
|
if (sws_init_context(context, srcFilter, dstFilter) < 0) { |
|
sws_freeContext(context); |
|
return NULL; |
|
} |
|
} |
|
return context; |
|
}
|
|
|