swscale: Split C input functions into separate file.

Signed-off-by: Diego Biurrun <diego@biurrun.de>

4 files changed, 765 insertions, 723 deletions

diff --git a/libswscale/Makefile b/libswscale/Makefile
index 0aee7e497b..f093516b5e 100644
--- a/libswscale/Makefile
+++ b/libswscale/Makefile
@@ -3,8 +3,8 @@ FFLIBS = avutil
 
 HEADERS = swscale.h
 
-OBJS = options.o rgb2rgb.o swscale.o utils.o yuv2rgb.o \
-       swscale_unscaled.o
+OBJS = input.o options.o rgb2rgb.o swscale.o utils.o \
+       swscale_unscaled.o yuv2rgb.o
 
 OBJS-$(ARCH_BFIN)          +=  bfin/internal_bfin.o     \
                                bfin/swscale_bfin.o      \
diff --git a/libswscale/input.c b/libswscale/input.c
new file mode 100644
index 0000000000..e636eac1f6
--- /dev/null
+++ b/libswscale/input.c
@@ -0,0 +1,761 @@
+/*
+ * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <assert.h>
+#include <math.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "libavutil/avutil.h"
+#include "libavutil/bswap.h"
+#include "libavutil/cpu.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/pixdesc.h"
+#include "config.h"
+#include "rgb2rgb.h"
+#include "swscale.h"
+#include "swscale_internal.h"
+
+#define RGB2YUV_SHIFT 15
+#define BY ( (int)(0.114*219/255*(1<<RGB2YUV_SHIFT)+0.5))
+#define BV (-(int)(0.081*224/255*(1<<RGB2YUV_SHIFT)+0.5))
+#define BU ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))
+#define GY ( (int)(0.587*219/255*(1<<RGB2YUV_SHIFT)+0.5))
+#define GV (-(int)(0.419*224/255*(1<<RGB2YUV_SHIFT)+0.5))
+#define GU (-(int)(0.331*224/255*(1<<RGB2YUV_SHIFT)+0.5))
+#define RY ( (int)(0.299*219/255*(1<<RGB2YUV_SHIFT)+0.5))
+#define RV ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))
+#define RU (-(int)(0.169*224/255*(1<<RGB2YUV_SHIFT)+0.5))
+
+#define input_pixel(pos) (isBE(origin) ? AV_RB16(pos) : AV_RL16(pos))
+
+#define r ((origin == PIX_FMT_BGR48BE || origin == PIX_FMT_BGR48LE) ? b_r : r_b)
+#define b ((origin == PIX_FMT_BGR48BE || origin == PIX_FMT_BGR48LE) ? r_b : b_r)
+
+static av_always_inline void
+rgb48ToY_c_template(uint16_t *dst, const uint16_t *src, int width,
+                    enum PixelFormat origin)
+{
+    int i;
+    for (i = 0; i < width; i++) {
+        unsigned int r_b = input_pixel(&src[i*3+0]);
+        unsigned int   g = input_pixel(&src[i*3+1]);
+        unsigned int b_r = input_pixel(&src[i*3+2]);
+
+        dst[i] = (RY*r + GY*g + BY*b + (0x2001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
+    }
+}
+
+static av_always_inline void
+rgb48ToUV_c_template(uint16_t *dstU, uint16_t *dstV,
+                    const uint16_t *src1, const uint16_t *src2,
+                    int width, enum PixelFormat origin)
+{
+    int i;
+    assert(src1==src2);
+    for (i = 0; i < width; i++) {
+        int r_b = input_pixel(&src1[i*3+0]);
+        int   g = input_pixel(&src1[i*3+1]);
+        int b_r = input_pixel(&src1[i*3+2]);
+
+        dstU[i] = (RU*r + GU*g + BU*b + (0x10001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
+        dstV[i] = (RV*r + GV*g + BV*b + (0x10001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
+    }
+}
+
+static av_always_inline void
+rgb48ToUV_half_c_template(uint16_t *dstU, uint16_t *dstV,
+                          const uint16_t *src1, const uint16_t *src2,
+                          int width, enum PixelFormat origin)
+{
+    int i;
+    assert(src1==src2);
+    for (i = 0; i < width; i++) {
+        int r_b = (input_pixel(&src1[6 * i + 0]) + input_pixel(&src1[6 * i + 3]) + 1) >> 1;
+        int   g = (input_pixel(&src1[6 * i + 1]) + input_pixel(&src1[6 * i + 4]) + 1) >> 1;
+        int b_r = (input_pixel(&src1[6 * i + 2]) + input_pixel(&src1[6 * i + 5]) + 1) >> 1;
+
+        dstU[i]= (RU*r + GU*g + BU*b + (0x10001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
+        dstV[i]= (RV*r + GV*g + BV*b + (0x10001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
+    }
+}
+
+#undef r
+#undef b
+#undef input_pixel
+
+#define rgb48funcs(pattern, BE_LE, origin) \
+static void pattern ## 48 ## BE_LE ## ToY_c(uint8_t *_dst, const uint8_t *_src, \
+                                    int width, uint32_t *unused) \
+{ \
+    const uint16_t *src = (const uint16_t *) _src; \
+    uint16_t *dst = (uint16_t *) _dst; \
+    rgb48ToY_c_template(dst, src, width, origin); \
+} \
+ \
+static void pattern ## 48 ## BE_LE ## ToUV_c(uint8_t *_dstU, uint8_t *_dstV, \
+                                    const uint8_t *_src1, const uint8_t *_src2, \
+                                    int width, uint32_t *unused) \
+{ \
+    const uint16_t *src1 = (const uint16_t *) _src1, \
+                   *src2 = (const uint16_t *) _src2; \
+    uint16_t *dstU = (uint16_t *) _dstU, *dstV = (uint16_t *) _dstV; \
+    rgb48ToUV_c_template(dstU, dstV, src1, src2, width, origin); \
+} \
+ \
+static void pattern ## 48 ## BE_LE ## ToUV_half_c(uint8_t *_dstU, uint8_t *_dstV, \
+                                    const uint8_t *_src1, const uint8_t *_src2, \
+                                    int width, uint32_t *unused) \
+{ \
+    const uint16_t *src1 = (const uint16_t *) _src1, \
+                   *src2 = (const uint16_t *) _src2; \
+    uint16_t *dstU = (uint16_t *) _dstU, *dstV = (uint16_t *) _dstV; \
+    rgb48ToUV_half_c_template(dstU, dstV, src1, src2, width, origin); \
+}
+
+rgb48funcs(rgb, LE, PIX_FMT_RGB48LE)
+rgb48funcs(rgb, BE, PIX_FMT_RGB48BE)
+rgb48funcs(bgr, LE, PIX_FMT_BGR48LE)
+rgb48funcs(bgr, BE, PIX_FMT_BGR48BE)
+
+#define input_pixel(i) ((origin == PIX_FMT_RGBA || origin == PIX_FMT_BGRA || \
+                         origin == PIX_FMT_ARGB || origin == PIX_FMT_ABGR) ? AV_RN32A(&src[(i)*4]) : \
+                        (isBE(origin) ? AV_RB16(&src[(i)*2]) : AV_RL16(&src[(i)*2])))
+
+static av_always_inline void
+rgb16_32ToY_c_template(uint8_t *dst, const uint8_t *src,
+                       int width, enum PixelFormat origin,
+                       int shr,   int shg,   int shb, int shp,
+                       int maskr, int maskg, int maskb,
+                       int rsh,   int gsh,   int bsh, int S)
+{
+    const int ry = RY << rsh, gy = GY << gsh, by = BY << bsh;
+    const unsigned rnd = 33u << (S - 1);
+    int i;
+
+    for (i = 0; i < width; i++) {
+        int px = input_pixel(i) >> shp;
+        int b = (px & maskb) >> shb;
+        int g = (px & maskg) >> shg;
+        int r = (px & maskr) >> shr;
+
+        dst[i] = (ry * r + gy * g + by * b + rnd) >> S;
+    }
+}
+
+static av_always_inline void
+rgb16_32ToUV_c_template(uint8_t *dstU, uint8_t *dstV,
+                        const uint8_t *src, int width,
+                        enum PixelFormat origin,
+                        int shr,   int shg,   int shb, int shp,
+                        int maskr, int maskg, int maskb,
+                        int rsh,   int gsh,   int bsh, int S)
+{
+    const int ru = RU << rsh, gu = GU << gsh, bu = BU << bsh,
+              rv = RV << rsh, gv = GV << gsh, bv = BV << bsh;
+    const unsigned rnd = 257u << (S - 1);
+    int i;
+
+    for (i = 0; i < width; i++) {
+        int px = input_pixel(i) >> shp;
+        int b = (px & maskb) >> shb;
+        int g = (px & maskg) >> shg;
+        int r = (px & maskr) >> shr;
+
+        dstU[i] = (ru * r + gu * g + bu * b + rnd) >> S;
+        dstV[i] = (rv * r + gv * g + bv * b + rnd) >> S;
+    }
+}
+
+static av_always_inline void
+rgb16_32ToUV_half_c_template(uint8_t *dstU, uint8_t *dstV,
+                             const uint8_t *src, int width,
+                             enum PixelFormat origin,
+                             int shr,   int shg,   int shb, int shp,
+                             int maskr, int maskg, int maskb,
+                             int rsh,   int gsh,   int bsh, int S)
+{
+    const int ru = RU << rsh, gu = GU << gsh, bu = BU << bsh,
+              rv = RV << rsh, gv = GV << gsh, bv = BV << bsh,
+              maskgx = ~(maskr | maskb);
+    const unsigned rnd = 257u << S;
+    int i;
+
+    maskr |= maskr << 1; maskb |= maskb << 1; maskg |= maskg << 1;
+    for (i = 0; i < width; i++) {
+        int px0 = input_pixel(2 * i + 0) >> shp;
+        int px1 = input_pixel(2 * i + 1) >> shp;
+        int b, r, g = (px0 & maskgx) + (px1 & maskgx);
+        int rb = px0 + px1 - g;
+
+        b = (rb & maskb) >> shb;
+        if (shp || origin == PIX_FMT_BGR565LE || origin == PIX_FMT_BGR565BE ||
+            origin == PIX_FMT_RGB565LE || origin == PIX_FMT_RGB565BE) {
+            g >>= shg;
+        } else {
+            g = (g  & maskg) >> shg;
+        }
+        r = (rb & maskr) >> shr;
+
+        dstU[i] = (ru * r + gu * g + bu * b + rnd) >> (S + 1);
+        dstV[i] = (rv * r + gv * g + bv * b + rnd) >> (S + 1);
+    }
+}
+
+#undef input_pixel
+
+#define rgb16_32_wrapper(fmt, name, shr, shg, shb, shp, maskr, \
+                         maskg, maskb, rsh, gsh, bsh, S) \
+static void name ## ToY_c(uint8_t *dst, const uint8_t *src, \
+                          int width, uint32_t *unused) \
+{ \
+    rgb16_32ToY_c_template(dst, src, width, fmt, shr, shg, shb, shp, \
+                           maskr, maskg, maskb, rsh, gsh, bsh, S); \
+} \
+ \
+static void name ## ToUV_c(uint8_t *dstU, uint8_t *dstV, \
+                           const uint8_t *src, const uint8_t *dummy, \
+                           int width, uint32_t *unused) \
+{ \
+    rgb16_32ToUV_c_template(dstU, dstV, src, width, fmt, shr, shg, shb, shp, \
+                            maskr, maskg, maskb, rsh, gsh, bsh, S); \
+} \
+ \
+static void name ## ToUV_half_c(uint8_t *dstU, uint8_t *dstV, \
+                                const uint8_t *src, const uint8_t *dummy, \
+                                int width, uint32_t *unused) \
+{ \
+    rgb16_32ToUV_half_c_template(dstU, dstV, src, width, fmt, shr, shg, shb, shp, \
+                                 maskr, maskg, maskb, rsh, gsh, bsh, S); \
+}
+
+rgb16_32_wrapper(PIX_FMT_BGR32,    bgr32,  16, 0,  0, 0, 0xFF0000, 0xFF00,   0x00FF,  8, 0,  8, RGB2YUV_SHIFT+8)
+rgb16_32_wrapper(PIX_FMT_BGR32_1,  bgr321, 16, 0,  0, 8, 0xFF0000, 0xFF00,   0x00FF,  8, 0,  8, RGB2YUV_SHIFT+8)
+rgb16_32_wrapper(PIX_FMT_RGB32,    rgb32,   0, 0, 16, 0,   0x00FF, 0xFF00, 0xFF0000,  8, 0,  8, RGB2YUV_SHIFT+8)
+rgb16_32_wrapper(PIX_FMT_RGB32_1,  rgb321,  0, 0, 16, 8,   0x00FF, 0xFF00, 0xFF0000,  8, 0,  8, RGB2YUV_SHIFT+8)
+rgb16_32_wrapper(PIX_FMT_BGR565LE, bgr16le, 0, 0,  0, 0,   0x001F, 0x07E0,   0xF800, 11, 5,  0, RGB2YUV_SHIFT+8)
+rgb16_32_wrapper(PIX_FMT_BGR555LE, bgr15le, 0, 0,  0, 0,   0x001F, 0x03E0,   0x7C00, 10, 5,  0, RGB2YUV_SHIFT+7)
+rgb16_32_wrapper(PIX_FMT_BGR444LE, bgr12le, 0, 0,  0, 0,   0x000F, 0x00F0,   0x0F00,  8, 4,  0, RGB2YUV_SHIFT+4)
+rgb16_32_wrapper(PIX_FMT_RGB565LE, rgb16le, 0, 0,  0, 0,   0xF800, 0x07E0,   0x001F,  0, 5, 11, RGB2YUV_SHIFT+8)
+rgb16_32_wrapper(PIX_FMT_RGB555LE, rgb15le, 0, 0,  0, 0,   0x7C00, 0x03E0,   0x001F,  0, 5, 10, RGB2YUV_SHIFT+7)
+rgb16_32_wrapper(PIX_FMT_RGB444LE, rgb12le, 0, 0,  0, 0,   0x0F00, 0x00F0,   0x000F,  0, 4,  8, RGB2YUV_SHIFT+4)
+rgb16_32_wrapper(PIX_FMT_BGR565BE, bgr16be, 0, 0,  0, 0,   0x001F, 0x07E0,   0xF800, 11, 5,  0, RGB2YUV_SHIFT+8)
+rgb16_32_wrapper(PIX_FMT_BGR555BE, bgr15be, 0, 0,  0, 0,   0x001F, 0x03E0,   0x7C00, 10, 5,  0, RGB2YUV_SHIFT+7)
+rgb16_32_wrapper(PIX_FMT_BGR444BE, bgr12be, 0, 0,  0, 0,   0x000F, 0x00F0,   0x0F00,  8, 4,  0, RGB2YUV_SHIFT+4)
+rgb16_32_wrapper(PIX_FMT_RGB565BE, rgb16be, 0, 0,  0, 0,   0xF800, 0x07E0,   0x001F,  0, 5, 11, RGB2YUV_SHIFT+8)
+rgb16_32_wrapper(PIX_FMT_RGB555BE, rgb15be, 0, 0,  0, 0,   0x7C00, 0x03E0,   0x001F,  0, 5, 10, RGB2YUV_SHIFT+7)
+rgb16_32_wrapper(PIX_FMT_RGB444BE, rgb12be, 0, 0,  0, 0,   0x0F00, 0x00F0,   0x000F,  0, 4,  8, RGB2YUV_SHIFT+4)
+
+static void abgrToA_c(uint8_t *dst, const uint8_t *src, int width, uint32_t *unused)
+{
+    int i;
+    for (i=0; i<width; i++) {
+        dst[i]= src[4*i];
+    }
+}
+
+static void rgbaToA_c(uint8_t *dst, const uint8_t *src, int width, uint32_t *unused)
+{
+    int i;
+    for (i=0; i<width; i++) {
+        dst[i]= src[4*i+3];
+    }
+}
+
+static void palToY_c(uint8_t *dst, const uint8_t *src, int width, uint32_t *pal)
+{
+    int i;
+    for (i=0; i<width; i++) {
+        int d= src[i];
+
+        dst[i]= pal[d] & 0xFF;
+    }
+}
+
+static void palToUV_c(uint8_t *dstU, uint8_t *dstV,
+                      const uint8_t *src1, const uint8_t *src2,
+                      int width, uint32_t *pal)
+{
+    int i;
+    assert(src1 == src2);
+    for (i=0; i<width; i++) {
+        int p= pal[src1[i]];
+
+        dstU[i]= p>>8;
+        dstV[i]= p>>16;
+    }
+}
+
+static void monowhite2Y_c(uint8_t *dst, const uint8_t *src,
+                          int width, uint32_t *unused)
+{
+    int i, j;
+    for (i=0; i<width/8; i++) {
+        int d= ~src[i];
+        for(j=0; j<8; j++)
+            dst[8*i+j]= ((d>>(7-j))&1)*255;
+    }
+}
+
+static void monoblack2Y_c(uint8_t *dst, const uint8_t *src,
+                          int width, uint32_t *unused)
+{
+    int i, j;
+    for (i=0; i<width/8; i++) {
+        int d= src[i];
+        for(j=0; j<8; j++)
+            dst[8*i+j]= ((d>>(7-j))&1)*255;
+    }
+}
+
+static void yuy2ToY_c(uint8_t *dst, const uint8_t *src, int width,
+                      uint32_t *unused)
+{
+    int i;
+    for (i=0; i<width; i++)
+        dst[i]= src[2*i];
+}
+
+static void yuy2ToUV_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
+                       const uint8_t *src2, int width, uint32_t *unused)
+{
+    int i;
+    for (i=0; i<width; i++) {
+        dstU[i]= src1[4*i + 1];
+        dstV[i]= src1[4*i + 3];
+    }
+    assert(src1 == src2);
+}
+
+static void bswap16Y_c(uint8_t *_dst, const uint8_t *_src, int width, uint32_t *unused)
+{
+    int i;
+    const uint16_t *src = (const uint16_t *) _src;
+    uint16_t *dst = (uint16_t *) _dst;
+    for (i=0; i<width; i++) {
+        dst[i] = av_bswap16(src[i]);
+    }
+}
+
+static void bswap16UV_c(uint8_t *_dstU, uint8_t *_dstV, const uint8_t *_src1,
+                        const uint8_t *_src2, int width, uint32_t *unused)
+{
+    int i;
+    const uint16_t *src1 = (const uint16_t *) _src1,
+                   *src2 = (const uint16_t *) _src2;
+    uint16_t *dstU = (uint16_t *) _dstU, *dstV = (uint16_t *) _dstV;
+    for (i=0; i<width; i++) {
+        dstU[i] = av_bswap16(src1[i]);
+        dstV[i] = av_bswap16(src2[i]);
+    }
+}
+
+/* This is almost identical to the previous, end exists only because
+ * yuy2ToY/UV)(dst, src+1, ...) would have 100% unaligned accesses. */
+static void uyvyToY_c(uint8_t *dst, const uint8_t *src, int width,
+                      uint32_t *unused)
+{
+    int i;
+    for (i=0; i<width; i++)
+        dst[i]= src[2*i+1];
+}
+
+static void uyvyToUV_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
+                       const uint8_t *src2, int width, uint32_t *unused)
+{
+    int i;
+    for (i=0; i<width; i++) {
+        dstU[i]= src1[4*i + 0];
+        dstV[i]= src1[4*i + 2];
+    }
+    assert(src1 == src2);
+}
+
+static av_always_inline void nvXXtoUV_c(uint8_t *dst1, uint8_t *dst2,
+                                        const uint8_t *src, int width)
+{
+    int i;
+    for (i = 0; i < width; i++) {
+        dst1[i] = src[2*i+0];
+        dst2[i] = src[2*i+1];
+    }
+}
+
+static void nv12ToUV_c(uint8_t *dstU, uint8_t *dstV,
+                       const uint8_t *src1, const uint8_t *src2,
+                       int width, uint32_t *unused)
+{
+    nvXXtoUV_c(dstU, dstV, src1, width);
+}
+
+static void nv21ToUV_c(uint8_t *dstU, uint8_t *dstV,
+                       const uint8_t *src1, const uint8_t *src2,
+                       int width, uint32_t *unused)
+{
+    nvXXtoUV_c(dstV, dstU, src1, width);
+}
+
+#define input_pixel(pos) (isBE(origin) ? AV_RB16(pos) : AV_RL16(pos))
+
+static void bgr24ToY_c(uint8_t *dst, const uint8_t *src,
+                       int width, uint32_t *unused)
+{
+    int i;
+    for (i=0; i<width; i++) {
+        int b= src[i*3+0];
+        int g= src[i*3+1];
+        int r= src[i*3+2];
+
+        dst[i]= ((RY*r + GY*g + BY*b + (33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
+    }
+}
+
+static void bgr24ToUV_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
+                        const uint8_t *src2, int width, uint32_t *unused)
+{
+    int i;
+    for (i=0; i<width; i++) {
+        int b= src1[3*i + 0];
+        int g= src1[3*i + 1];
+        int r= src1[3*i + 2];
+
+        dstU[i]= (RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT;
+        dstV[i]= (RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT;
+    }
+    assert(src1 == src2);
+}
+
+static void bgr24ToUV_half_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
+                             const uint8_t *src2, int width, uint32_t *unused)
+{
+    int i;
+    for (i=0; i<width; i++) {
+        int b= src1[6*i + 0] + src1[6*i + 3];
+        int g= src1[6*i + 1] + src1[6*i + 4];
+        int r= src1[6*i + 2] + src1[6*i + 5];
+
+        dstU[i]= (RU*r + GU*g + BU*b + (257<<RGB2YUV_SHIFT))>>(RGB2YUV_SHIFT+1);
+        dstV[i]= (RV*r + GV*g + BV*b + (257<<RGB2YUV_SHIFT))>>(RGB2YUV_SHIFT+1);
+    }
+    assert(src1 == src2);
+}
+
+static void rgb24ToY_c(uint8_t *dst, const uint8_t *src, int width,
+                       uint32_t *unused)
+{
+    int i;
+    for (i=0; i<width; i++) {
+        int r= src[i*3+0];
+        int g= src[i*3+1];
+        int b= src[i*3+2];
+
+        dst[i]= ((RY*r + GY*g + BY*b + (33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
+    }
+}
+
+static void rgb24ToUV_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
+                        const uint8_t *src2, int width, uint32_t *unused)
+{
+    int i;
+    assert(src1==src2);
+    for (i=0; i<width; i++) {
+        int r= src1[3*i + 0];
+        int g= src1[3*i + 1];
+        int b= src1[3*i + 2];
+
+        dstU[i]= (RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT;
+        dstV[i]= (RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT;
+    }
+}
+
+static void rgb24ToUV_half_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
+                             const uint8_t *src2, int width, uint32_t *unused)
+{
+    int i;
+    assert(src1==src2);
+    for (i=0; i<width; i++) {
+        int r= src1[6*i + 0] + src1[6*i + 3];
+        int g= src1[6*i + 1] + src1[6*i + 4];
+        int b= src1[6*i + 2] + src1[6*i + 5];
+
+        dstU[i]= (RU*r + GU*g + BU*b + (257<<RGB2YUV_SHIFT))>>(RGB2YUV_SHIFT+1);
+        dstV[i]= (RV*r + GV*g + BV*b + (257<<RGB2YUV_SHIFT))>>(RGB2YUV_SHIFT+1);
+    }
+}
+
+static void planar_rgb_to_y(uint8_t *dst, const uint8_t *src[4], int width)
+{
+    int i;
+    for (i = 0; i < width; i++) {
+        int g = src[0][i];
+        int b = src[1][i];
+        int r = src[2][i];
+
+        dst[i] = ((RY * r + GY * g + BY * b + (33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
+    }
+}
+
+static void planar_rgb16le_to_y(uint8_t *_dst, const uint8_t *_src[4], int width)
+{
+    int i;
+    const uint16_t **src = (const uint16_t **) _src;
+    uint16_t *dst = (uint16_t *) _dst;
+    for (i = 0; i < width; i++) {
+        int g = AV_RL16(src[0] + i);
+        int b = AV_RL16(src[1] + i);
+        int r = AV_RL16(src[2] + i);
+
+        dst[i] = ((RY * r + GY * g + BY * b + (33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
+    }
+}
+
+static void planar_rgb16be_to_y(uint8_t *_dst, const uint8_t *_src[4], int width)
+{
+    int i;
+    const uint16_t **src = (const uint16_t **) _src;
+    uint16_t *dst = (uint16_t *) _dst;
+    for (i = 0; i < width; i++) {
+        int g = AV_RB16(src[0] + i);
+        int b = AV_RB16(src[1] + i);
+        int r = AV_RB16(src[2] + i);
+
+        dst[i] = ((RY * r + GY * g + BY * b + (33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
+    }
+}
+
+static void planar_rgb_to_uv(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4], int width)
+{
+    int i;
+    for (i = 0; i < width; i++) {
+        int g = src[0][i];
+        int b = src[1][i];
+        int r = src[2][i];
+
+        dstU[i] = (RU * r + GU * g + BU * b + (257 << RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT + 1);
+        dstV[i] = (RV * r + GV * g + BV * b + (257 << RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT + 1);
+    }
+}
+
+static void planar_rgb16le_to_uv(uint8_t *_dstU, uint8_t *_dstV, const uint8_t *_src[4], int width)
+{
+    int i;
+    const uint16_t **src = (const uint16_t **) _src;
+    uint16_t *dstU = (uint16_t *) _dstU;
+    uint16_t *dstV = (uint16_t *) _dstV;
+    for (i = 0; i < width; i++) {
+        int g = AV_RL16(src[0] + i);
+        int b = AV_RL16(src[1] + i);
+        int r = AV_RL16(src[2] + i);
+
+        dstU[i] = (RU * r + GU * g + BU * b + (257 << RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT + 1);
+        dstV[i] = (RV * r + GV * g + BV * b + (257 << RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT + 1);
+    }
+}
+
+static void planar_rgb16be_to_uv(uint8_t *_dstU, uint8_t *_dstV, const uint8_t *_src[4], int width)
+{
+    int i;
+    const uint16_t **src = (const uint16_t **) _src;
+    uint16_t *dstU = (uint16_t *) _dstU;
+    uint16_t *dstV = (uint16_t *) _dstV;
+    for (i = 0; i < width; i++) {
+        int g = AV_RB16(src[0] + i);
+        int b = AV_RB16(src[1] + i);
+        int r = AV_RB16(src[2] + i);
+
+        dstU[i] = (RU * r + GU * g + BU * b + (257 << RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT + 1);
+        dstV[i] = (RV * r + GV * g + BV * b + (257 << RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT + 1);
+    }
+}
+
+av_cold void ff_sws_init_input_funcs(SwsContext *c)
+{
+    enum PixelFormat srcFormat = c->srcFormat;
+
+    c->chrToYV12 = NULL;
+    switch(srcFormat) {
+        case PIX_FMT_YUYV422  : c->chrToYV12 = yuy2ToUV_c; break;
+        case PIX_FMT_UYVY422  : c->chrToYV12 = uyvyToUV_c; break;
+        case PIX_FMT_NV12     : c->chrToYV12 = nv12ToUV_c; break;
+        case PIX_FMT_NV21     : c->chrToYV12 = nv21ToUV_c; break;
+        case PIX_FMT_RGB8     :
+        case PIX_FMT_BGR8     :
+        case PIX_FMT_PAL8     :
+        case PIX_FMT_BGR4_BYTE:
+        case PIX_FMT_RGB4_BYTE: c->chrToYV12 = palToUV_c; break;
+        case PIX_FMT_GBRP9LE:
+        case PIX_FMT_GBRP10LE:
+        case PIX_FMT_GBRP16LE:  c->readChrPlanar = planar_rgb16le_to_uv; break;
+        case PIX_FMT_GBRP9BE:
+        case PIX_FMT_GBRP10BE:
+        case PIX_FMT_GBRP16BE:  c->readChrPlanar = planar_rgb16be_to_uv; break;
+        case PIX_FMT_GBRP:      c->readChrPlanar = planar_rgb_to_uv; break;
+#if HAVE_BIGENDIAN
+        case PIX_FMT_YUV444P9LE:
+        case PIX_FMT_YUV422P9LE:
+        case PIX_FMT_YUV420P9LE:
+        case PIX_FMT_YUV422P10LE:
+        case PIX_FMT_YUV444P10LE:
+        case PIX_FMT_YUV420P10LE:
+        case PIX_FMT_YUV420P16LE:
+        case PIX_FMT_YUV422P16LE:
+        case PIX_FMT_YUV444P16LE: c->chrToYV12 = bswap16UV_c; break;
+#else
+        case PIX_FMT_YUV444P9BE:
+        case PIX_FMT_YUV422P9BE:
+        case PIX_FMT_YUV420P9BE:
+        case PIX_FMT_YUV444P10BE:
+        case PIX_FMT_YUV422P10BE:
+        case PIX_FMT_YUV420P10BE:
+        case PIX_FMT_YUV420P16BE:
+        case PIX_FMT_YUV422P16BE:
+        case PIX_FMT_YUV444P16BE: c->chrToYV12 = bswap16UV_c; break;
+#endif
+    }
+    if (c->chrSrcHSubSample) {
+        switch(srcFormat) {
+        case PIX_FMT_RGB48BE : c->chrToYV12 = rgb48BEToUV_half_c; break;
+        case PIX_FMT_RGB48LE : c->chrToYV12 = rgb48LEToUV_half_c; break;
+        case PIX_FMT_BGR48BE : c->chrToYV12 = bgr48BEToUV_half_c; break;
+        case PIX_FMT_BGR48LE : c->chrToYV12 = bgr48LEToUV_half_c; break;
+        case PIX_FMT_RGB32   : c->chrToYV12 = bgr32ToUV_half_c;   break;
+        case PIX_FMT_RGB32_1 : c->chrToYV12 = bgr321ToUV_half_c;  break;
+        case PIX_FMT_BGR24   : c->chrToYV12 = bgr24ToUV_half_c;   break;
+        case PIX_FMT_BGR565LE: c->chrToYV12 = bgr16leToUV_half_c; break;
+        case PIX_FMT_BGR565BE: c->chrToYV12 = bgr16beToUV_half_c; break;
+        case PIX_FMT_BGR555LE: c->chrToYV12 = bgr15leToUV_half_c; break;
+        case PIX_FMT_BGR555BE: c->chrToYV12 = bgr15beToUV_half_c; break;
+        case PIX_FMT_BGR444LE: c->chrToYV12 = bgr12leToUV_half_c; break;
+        case PIX_FMT_BGR444BE: c->chrToYV12 = bgr12beToUV_half_c; break;
+        case PIX_FMT_BGR32   : c->chrToYV12 = rgb32ToUV_half_c;   break;
+        case PIX_FMT_BGR32_1 : c->chrToYV12 = rgb321ToUV_half_c;  break;
+        case PIX_FMT_RGB24   : c->chrToYV12 = rgb24ToUV_half_c;   break;
+        case PIX_FMT_RGB565LE: c->chrToYV12 = rgb16leToUV_half_c; break;
+        case PIX_FMT_RGB565BE: c->chrToYV12 = rgb16beToUV_half_c; break;
+        case PIX_FMT_RGB555LE: c->chrToYV12 = rgb15leToUV_half_c; break;
+        case PIX_FMT_RGB555BE: c->chrToYV12 = rgb15beToUV_half_c; break;
+        case PIX_FMT_RGB444LE: c->chrToYV12 = rgb12leToUV_half_c; break;
+        case PIX_FMT_RGB444BE: c->chrToYV12 = rgb12beToUV_half_c; break;
+        }
+    } else {
+        switch(srcFormat) {
+        case PIX_FMT_RGB48BE : c->chrToYV12 = rgb48BEToUV_c; break;
+        case PIX_FMT_RGB48LE : c->chrToYV12 = rgb48LEToUV_c; break;
+        case PIX_FMT_BGR48BE : c->chrToYV12 = bgr48BEToUV_c; break;
+        case PIX_FMT_BGR48LE : c->chrToYV12 = bgr48LEToUV_c; break;
+        case PIX_FMT_RGB32   : c->chrToYV12 = bgr32ToUV_c;   break;
+        case PIX_FMT_RGB32_1 : c->chrToYV12 = bgr321ToUV_c;  break;
+        case PIX_FMT_BGR24   : c->chrToYV12 = bgr24ToUV_c;   break;
+        case PIX_FMT_BGR565LE: c->chrToYV12 = bgr16leToUV_c; break;
+        case PIX_FMT_BGR565BE: c->chrToYV12 = bgr16beToUV_c; break;
+        case PIX_FMT_BGR555LE: c->chrToYV12 = bgr15leToUV_c; break;
+        case PIX_FMT_BGR555BE: c->chrToYV12 = bgr15beToUV_c; break;
+        case PIX_FMT_BGR444LE: c->chrToYV12 = bgr12leToUV_c; break;
+        case PIX_FMT_BGR444BE: c->chrToYV12 = bgr12beToUV_c; break;
+        case PIX_FMT_BGR32   : c->chrToYV12 = rgb32ToUV_c;   break;
+        case PIX_FMT_BGR32_1 : c->chrToYV12 = rgb321ToUV_c;  break;
+        case PIX_FMT_RGB24   : c->chrToYV12 = rgb24ToUV_c;   break;
+        case PIX_FMT_RGB565LE: c->chrToYV12 = rgb16leToUV_c; break;
+        case PIX_FMT_RGB565BE: c->chrToYV12 = rgb16beToUV_c; break;
+        case PIX_FMT_RGB555LE: c->chrToYV12 = rgb15leToUV_c; break;
+        case PIX_FMT_RGB555BE: c->chrToYV12 = rgb15beToUV_c; break;
+        case PIX_FMT_RGB444LE: c->chrToYV12 = rgb12leToUV_c; break;
+        case PIX_FMT_RGB444BE: c->chrToYV12 = rgb12beToUV_c; break;
+        }
+    }
+
+    c->lumToYV12 = NULL;
+    c->alpToYV12 = NULL;
+    switch (srcFormat) {
+    case PIX_FMT_GBRP9LE:
+    case PIX_FMT_GBRP10LE:
+    case PIX_FMT_GBRP16LE: c->readLumPlanar = planar_rgb16le_to_y; break;
+    case PIX_FMT_GBRP9BE:
+    case PIX_FMT_GBRP10BE:
+    case PIX_FMT_GBRP16BE: c->readLumPlanar = planar_rgb16be_to_y; break;
+    case PIX_FMT_GBRP:     c->readLumPlanar = planar_rgb_to_y; break;
+#if HAVE_BIGENDIAN
+    case PIX_FMT_YUV444P9LE:
+    case PIX_FMT_YUV422P9LE:
+    case PIX_FMT_YUV420P9LE:
+    case PIX_FMT_YUV444P10LE:
+    case PIX_FMT_YUV422P10LE:
+    case PIX_FMT_YUV420P10LE:
+    case PIX_FMT_YUV420P16LE:
+    case PIX_FMT_YUV422P16LE:
+    case PIX_FMT_YUV444P16LE:
+    case PIX_FMT_GRAY16LE: c->lumToYV12 = bswap16Y_c; break;
+#else
+    case PIX_FMT_YUV444P9BE:
+    case PIX_FMT_YUV422P9BE:
+    case PIX_FMT_YUV420P9BE:
+    case PIX_FMT_YUV444P10BE:
+    case PIX_FMT_YUV422P10BE:
+    case PIX_FMT_YUV420P10BE:
+    case PIX_FMT_YUV420P16BE:
+    case PIX_FMT_YUV422P16BE:
+    case PIX_FMT_YUV444P16BE:
+    case PIX_FMT_GRAY16BE: c->lumToYV12 = bswap16Y_c; break;
+#endif
+    case PIX_FMT_YUYV422  :
+    case PIX_FMT_Y400A    : c->lumToYV12 = yuy2ToY_c; break;
+    case PIX_FMT_UYVY422  : c->lumToYV12 = uyvyToY_c;    break;
+    case PIX_FMT_BGR24    : c->lumToYV12 = bgr24ToY_c;   break;
+    case PIX_FMT_BGR565LE : c->lumToYV12 = bgr16leToY_c; break;
+    case PIX_FMT_BGR565BE : c->lumToYV12 = bgr16beToY_c; break;
+    case PIX_FMT_BGR555LE : c->lumToYV12 = bgr15leToY_c; break;
+    case PIX_FMT_BGR555BE : c->lumToYV12 = bgr15beToY_c; break;
+    case PIX_FMT_BGR444LE : c->lumToYV12 = bgr12leToY_c; break;
+    case PIX_FMT_BGR444BE : c->lumToYV12 = bgr12beToY_c; break;
+    case PIX_FMT_RGB24    : c->lumToYV12 = rgb24ToY_c;   break;
+    case PIX_FMT_RGB565LE : c->lumToYV12 = rgb16leToY_c; break;
+    case PIX_FMT_RGB565BE : c->lumToYV12 = rgb16beToY_c; break;
+    case PIX_FMT_RGB555LE : c->lumToYV12 = rgb15leToY_c; break;
+    case PIX_FMT_RGB555BE : c->lumToYV12 = rgb15beToY_c; break;
+    case PIX_FMT_RGB444LE : c->lumToYV12 = rgb12leToY_c; break;
+    case PIX_FMT_RGB444BE : c->lumToYV12 = rgb12beToY_c; break;
+    case PIX_FMT_RGB8     :
+    case PIX_FMT_BGR8     :
+    case PIX_FMT_PAL8     :
+    case PIX_FMT_BGR4_BYTE:
+    case PIX_FMT_RGB4_BYTE: c->lumToYV12 = palToY_c; break;
+    case PIX_FMT_MONOBLACK: c->lumToYV12 = monoblack2Y_c; break;
+    case PIX_FMT_MONOWHITE: c->lumToYV12 = monowhite2Y_c; break;
+    case PIX_FMT_RGB32  : c->lumToYV12 = bgr32ToY_c;  break;
+    case PIX_FMT_RGB32_1: c->lumToYV12 = bgr321ToY_c; break;
+    case PIX_FMT_BGR32  : c->lumToYV12 = rgb32ToY_c;  break;
+    case PIX_FMT_BGR32_1: c->lumToYV12 = rgb321ToY_c; break;
+    case PIX_FMT_RGB48BE: c->lumToYV12 = rgb48BEToY_c; break;
+    case PIX_FMT_RGB48LE: c->lumToYV12 = rgb48LEToY_c; break;
+    case PIX_FMT_BGR48BE: c->lumToYV12 = bgr48BEToY_c; break;
+    case PIX_FMT_BGR48LE: c->lumToYV12 = bgr48LEToY_c; break;
+    }
+    if (c->alpPixBuf) {
+        switch (srcFormat) {
+        case PIX_FMT_BGRA:
+        case PIX_FMT_RGBA:  c->alpToYV12 = rgbaToA_c; break;
+        case PIX_FMT_ABGR:
+        case PIX_FMT_ARGB:  c->alpToYV12 = abgrToA_c; break;
+        case PIX_FMT_Y400A: c->alpToYV12 = uyvyToY_c; break;
+        }
+    }
+}
diff --git a/libswscale/swscale.c b/libswscale/swscale.c
index a7057bb48e..b7f348b4ff 100644
--- a/libswscale/swscale.c
+++ b/libswscale/swscale.c
@@ -34,19 +34,6 @@
 #include "libavutil/bswap.h"
 #include "libavutil/pixdesc.h"
 
-#define DITHER1XBPP
-
-#define RGB2YUV_SHIFT 15
-#define BY ( (int)(0.114*219/255*(1<<RGB2YUV_SHIFT)+0.5))
-#define BV (-(int)(0.081*224/255*(1<<RGB2YUV_SHIFT)+0.5))
-#define BU ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))
-#define GY ( (int)(0.587*219/255*(1<<RGB2YUV_SHIFT)+0.5))
-#define GV (-(int)(0.419*224/255*(1<<RGB2YUV_SHIFT)+0.5))
-#define GU (-(int)(0.331*224/255*(1<<RGB2YUV_SHIFT)+0.5))
-#define RY ( (int)(0.299*219/255*(1<<RGB2YUV_SHIFT)+0.5))
-#define RV ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))
-#define RU (-(int)(0.169*224/255*(1<<RGB2YUV_SHIFT)+0.5))
-
 /*
 NOTES
 Special versions: fast Y 1:1 scaling (no interpolation in y direction)
@@ -1329,547 +1316,6 @@ static av_always_inline void fillPlane(uint8_t* plane, int stride,
     }
 }
 
-#define input_pixel(pos) (isBE(origin) ? AV_RB16(pos) : AV_RL16(pos))
-
-#define r ((origin == PIX_FMT_BGR48BE || origin == PIX_FMT_BGR48LE) ? b_r : r_b)
-#define b ((origin == PIX_FMT_BGR48BE || origin == PIX_FMT_BGR48LE) ? r_b : b_r)
-
-static av_always_inline void
-rgb48ToY_c_template(uint16_t *dst, const uint16_t *src, int width,
-                    enum PixelFormat origin)
-{
-    int i;
-    for (i = 0; i < width; i++) {
-        unsigned int r_b = input_pixel(&src[i*3+0]);
-        unsigned int   g = input_pixel(&src[i*3+1]);
-        unsigned int b_r = input_pixel(&src[i*3+2]);
-
-        dst[i] = (RY*r + GY*g + BY*b + (0x2001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
-    }
-}
-
-static av_always_inline void
-rgb48ToUV_c_template(uint16_t *dstU, uint16_t *dstV,
-                    const uint16_t *src1, const uint16_t *src2,
-                    int width, enum PixelFormat origin)
-{
-    int i;
-    assert(src1==src2);
-    for (i = 0; i < width; i++) {
-        int r_b = input_pixel(&src1[i*3+0]);
-        int   g = input_pixel(&src1[i*3+1]);
-        int b_r = input_pixel(&src1[i*3+2]);
-
-        dstU[i] = (RU*r + GU*g + BU*b + (0x10001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
-        dstV[i] = (RV*r + GV*g + BV*b + (0x10001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
-    }
-}
-
-static av_always_inline void
-rgb48ToUV_half_c_template(uint16_t *dstU, uint16_t *dstV,
-                          const uint16_t *src1, const uint16_t *src2,
-                          int width, enum PixelFormat origin)
-{
-    int i;
-    assert(src1==src2);
-    for (i = 0; i < width; i++) {
-        int r_b = (input_pixel(&src1[6 * i + 0]) + input_pixel(&src1[6 * i + 3]) + 1) >> 1;
-        int   g = (input_pixel(&src1[6 * i + 1]) + input_pixel(&src1[6 * i + 4]) + 1) >> 1;
-        int b_r = (input_pixel(&src1[6 * i + 2]) + input_pixel(&src1[6 * i + 5]) + 1) >> 1;
-
-        dstU[i]= (RU*r + GU*g + BU*b + (0x10001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
-        dstV[i]= (RV*r + GV*g + BV*b + (0x10001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
-    }
-}
-
-#undef r
-#undef b
-#undef input_pixel
-
-#define rgb48funcs(pattern, BE_LE, origin) \
-static void pattern ## 48 ## BE_LE ## ToY_c(uint8_t *_dst, const uint8_t *_src, \
-                                    int width, uint32_t *unused) \
-{ \
-    const uint16_t *src = (const uint16_t *) _src; \
-    uint16_t *dst = (uint16_t *) _dst; \
-    rgb48ToY_c_template(dst, src, width, origin); \
-} \
- \
-static void pattern ## 48 ## BE_LE ## ToUV_c(uint8_t *_dstU, uint8_t *_dstV, \
-                                    const uint8_t *_src1, const uint8_t *_src2, \
-                                    int width, uint32_t *unused) \
-{ \
-    const uint16_t *src1 = (const uint16_t *) _src1, \
-                   *src2 = (const uint16_t *) _src2; \
-    uint16_t *dstU = (uint16_t *) _dstU, *dstV = (uint16_t *) _dstV; \
-    rgb48ToUV_c_template(dstU, dstV, src1, src2, width, origin); \
-} \
- \
-static void pattern ## 48 ## BE_LE ## ToUV_half_c(uint8_t *_dstU, uint8_t *_dstV, \
-                                    const uint8_t *_src1, const uint8_t *_src2, \
-                                    int width, uint32_t *unused) \
-{ \
-    const uint16_t *src1 = (const uint16_t *) _src1, \
-                   *src2 = (const uint16_t *) _src2; \
-    uint16_t *dstU = (uint16_t *) _dstU, *dstV = (uint16_t *) _dstV; \
-    rgb48ToUV_half_c_template(dstU, dstV, src1, src2, width, origin); \
-}
-
-rgb48funcs(rgb, LE, PIX_FMT_RGB48LE)
-rgb48funcs(rgb, BE, PIX_FMT_RGB48BE)
-rgb48funcs(bgr, LE, PIX_FMT_BGR48LE)
-rgb48funcs(bgr, BE, PIX_FMT_BGR48BE)
-
-#define input_pixel(i) ((origin == PIX_FMT_RGBA || origin == PIX_FMT_BGRA || \
-                         origin == PIX_FMT_ARGB || origin == PIX_FMT_ABGR) ? AV_RN32A(&src[(i)*4]) : \
-                        (isBE(origin) ? AV_RB16(&src[(i)*2]) : AV_RL16(&src[(i)*2])))
-
-static av_always_inline void
-rgb16_32ToY_c_template(uint8_t *dst, const uint8_t *src,
-                       int width, enum PixelFormat origin,
-                       int shr,   int shg,   int shb, int shp,
-                       int maskr, int maskg, int maskb,
-                       int rsh,   int gsh,   int bsh, int S)
-{
-    const int ry = RY << rsh, gy = GY << gsh, by = BY << bsh;
-    const unsigned rnd = 33u << (S - 1);
-    int i;
-
-    for (i = 0; i < width; i++) {
-        int px = input_pixel(i) >> shp;
-        int b = (px & maskb) >> shb;
-        int g = (px & maskg) >> shg;
-        int r = (px & maskr) >> shr;
-
-        dst[i] = (ry * r + gy * g + by * b + rnd) >> S;
-    }
-}
-
-static av_always_inline void
-rgb16_32ToUV_c_template(uint8_t *dstU, uint8_t *dstV,
-                        const uint8_t *src, int width,
-                        enum PixelFormat origin,
-                        int shr,   int shg,   int shb, int shp,
-                        int maskr, int maskg, int maskb,
-                        int rsh,   int gsh,   int bsh, int S)
-{
-    const int ru = RU << rsh, gu = GU << gsh, bu = BU << bsh,
-              rv = RV << rsh, gv = GV << gsh, bv = BV << bsh;
-    const unsigned rnd = 257u << (S - 1);
-    int i;
-
-    for (i = 0; i < width; i++) {
-        int px = input_pixel(i) >> shp;
-        int b = (px & maskb) >> shb;
-        int g = (px & maskg) >> shg;
-        int r = (px & maskr) >> shr;
-
-        dstU[i] = (ru * r + gu * g + bu * b + rnd) >> S;
-        dstV[i] = (rv * r + gv * g + bv * b + rnd) >> S;
-    }
-}
-
-static av_always_inline void
-rgb16_32ToUV_half_c_template(uint8_t *dstU, uint8_t *dstV,
-                             const uint8_t *src, int width,
-                             enum PixelFormat origin,
-                             int shr,   int shg,   int shb, int shp,
-                             int maskr, int maskg, int maskb,
-                             int rsh,   int gsh,   int bsh, int S)
-{
-    const int ru = RU << rsh, gu = GU << gsh, bu = BU << bsh,
-              rv = RV << rsh, gv = GV << gsh, bv = BV << bsh,
-              maskgx = ~(maskr | maskb);
-    const unsigned rnd = 257u << S;
-    int i;
-
-    maskr |= maskr << 1; maskb |= maskb << 1; maskg |= maskg << 1;
-    for (i = 0; i < width; i++) {
-        int px0 = input_pixel(2 * i + 0) >> shp;
-        int px1 = input_pixel(2 * i + 1) >> shp;
-        int b, r, g = (px0 & maskgx) + (px1 & maskgx);
-        int rb = px0 + px1 - g;
-
-        b = (rb & maskb) >> shb;
-        if (shp || origin == PIX_FMT_BGR565LE || origin == PIX_FMT_BGR565BE ||
-            origin == PIX_FMT_RGB565LE || origin == PIX_FMT_RGB565BE) {
-            g >>= shg;
-        } else {
-            g = (g  & maskg) >> shg;
-        }
-        r = (rb & maskr) >> shr;
-
-        dstU[i] = (ru * r + gu * g + bu * b + rnd) >> (S + 1);
-        dstV[i] = (rv * r + gv * g + bv * b + rnd) >> (S + 1);
-    }
-}
-
-#undef input_pixel
-
-#define rgb16_32_wrapper(fmt, name, shr, shg, shb, shp, maskr, \
-                         maskg, maskb, rsh, gsh, bsh, S) \
-static void name ## ToY_c(uint8_t *dst, const uint8_t *src, \
-                          int width, uint32_t *unused) \
-{ \
-    rgb16_32ToY_c_template(dst, src, width, fmt, shr, shg, shb, shp, \
-                           maskr, maskg, maskb, rsh, gsh, bsh, S); \
-} \
- \
-static void name ## ToUV_c(uint8_t *dstU, uint8_t *dstV, \
-                           const uint8_t *src, const uint8_t *dummy, \
-                           int width, uint32_t *unused) \
-{ \
-    rgb16_32ToUV_c_template(dstU, dstV, src, width, fmt, shr, shg, shb, shp, \
-                            maskr, maskg, maskb, rsh, gsh, bsh, S); \
-} \
- \
-static void name ## ToUV_half_c(uint8_t *dstU, uint8_t *dstV, \
-                                const uint8_t *src, const uint8_t *dummy, \
-                                int width, uint32_t *unused) \
-{ \
-    rgb16_32ToUV_half_c_template(dstU, dstV, src, width, fmt, shr, shg, shb, shp, \
-                                 maskr, maskg, maskb, rsh, gsh, bsh, S); \
-}
-
-rgb16_32_wrapper(PIX_FMT_BGR32,    bgr32,  16, 0,  0, 0, 0xFF0000, 0xFF00,   0x00FF,  8, 0,  8, RGB2YUV_SHIFT+8)
-rgb16_32_wrapper(PIX_FMT_BGR32_1,  bgr321, 16, 0,  0, 8, 0xFF0000, 0xFF00,   0x00FF,  8, 0,  8, RGB2YUV_SHIFT+8)
-rgb16_32_wrapper(PIX_FMT_RGB32,    rgb32,   0, 0, 16, 0,   0x00FF, 0xFF00, 0xFF0000,  8, 0,  8, RGB2YUV_SHIFT+8)
-rgb16_32_wrapper(PIX_FMT_RGB32_1,  rgb321,  0, 0, 16, 8,   0x00FF, 0xFF00, 0xFF0000,  8, 0,  8, RGB2YUV_SHIFT+8)
-rgb16_32_wrapper(PIX_FMT_BGR565LE, bgr16le, 0, 0,  0, 0,   0x001F, 0x07E0,   0xF800, 11, 5,  0, RGB2YUV_SHIFT+8)
-rgb16_32_wrapper(PIX_FMT_BGR555LE, bgr15le, 0, 0,  0, 0,   0x001F, 0x03E0,   0x7C00, 10, 5,  0, RGB2YUV_SHIFT+7)
-rgb16_32_wrapper(PIX_FMT_BGR444LE, bgr12le, 0, 0,  0, 0,   0x000F, 0x00F0,   0x0F00,  8, 4,  0, RGB2YUV_SHIFT+4)
-rgb16_32_wrapper(PIX_FMT_RGB565LE, rgb16le, 0, 0,  0, 0,   0xF800, 0x07E0,   0x001F,  0, 5, 11, RGB2YUV_SHIFT+8)
-rgb16_32_wrapper(PIX_FMT_RGB555LE, rgb15le, 0, 0,  0, 0,   0x7C00, 0x03E0,   0x001F,  0, 5, 10, RGB2YUV_SHIFT+7)
-rgb16_32_wrapper(PIX_FMT_RGB444LE, rgb12le, 0, 0,  0, 0,   0x0F00, 0x00F0,   0x000F,  0, 4,  8, RGB2YUV_SHIFT+4)
-rgb16_32_wrapper(PIX_FMT_BGR565BE, bgr16be, 0, 0,  0, 0,   0x001F, 0x07E0,   0xF800, 11, 5,  0, RGB2YUV_SHIFT+8)
-rgb16_32_wrapper(PIX_FMT_BGR555BE, bgr15be, 0, 0,  0, 0,   0x001F, 0x03E0,   0x7C00, 10, 5,  0, RGB2YUV_SHIFT+7)
-rgb16_32_wrapper(PIX_FMT_BGR444BE, bgr12be, 0, 0,  0, 0,   0x000F, 0x00F0,   0x0F00,  8, 4,  0, RGB2YUV_SHIFT+4)
-rgb16_32_wrapper(PIX_FMT_RGB565BE, rgb16be, 0, 0,  0, 0,   0xF800, 0x07E0,   0x001F,  0, 5, 11, RGB2YUV_SHIFT+8)
-rgb16_32_wrapper(PIX_FMT_RGB555BE, rgb15be, 0, 0,  0, 0,   0x7C00, 0x03E0,   0x001F,  0, 5, 10, RGB2YUV_SHIFT+7)
-rgb16_32_wrapper(PIX_FMT_RGB444BE, rgb12be, 0, 0,  0, 0,   0x0F00, 0x00F0,   0x000F,  0, 4,  8, RGB2YUV_SHIFT+4)
-
-static void abgrToA_c(uint8_t *dst, const uint8_t *src, int width, uint32_t *unused)
-{
-    int i;
-    for (i=0; i<width; i++) {
-        dst[i]= src[4*i];
-    }
-}
-
-static void rgbaToA_c(uint8_t *dst, const uint8_t *src, int width, uint32_t *unused)
-{
-    int i;
-    for (i=0; i<width; i++) {
-        dst[i]= src[4*i+3];
-    }
-}
-
-static void palToY_c(uint8_t *dst, const uint8_t *src, int width, uint32_t *pal)
-{
-    int i;
-    for (i=0; i<width; i++) {
-        int d= src[i];
-
-        dst[i]= pal[d] & 0xFF;
-    }
-}
-
-static void palToUV_c(uint8_t *dstU, uint8_t *dstV,
-                      const uint8_t *src1, const uint8_t *src2,
-                      int width, uint32_t *pal)
-{
-    int i;
-    assert(src1 == src2);
-    for (i=0; i<width; i++) {
-        int p= pal[src1[i]];
-
-        dstU[i]= p>>8;
-        dstV[i]= p>>16;
-    }
-}
-
-static void monowhite2Y_c(uint8_t *dst, const uint8_t *src,
-                          int width, uint32_t *unused)
-{
-    int i, j;
-    for (i=0; i<width/8; i++) {
-        int d= ~src[i];
-        for(j=0; j<8; j++)
-            dst[8*i+j]= ((d>>(7-j))&1)*255;
-    }
-}
-
-static void monoblack2Y_c(uint8_t *dst, const uint8_t *src,
-                          int width, uint32_t *unused)
-{
-    int i, j;
-    for (i=0; i<width/8; i++) {
-        int d= src[i];
-        for(j=0; j<8; j++)
-            dst[8*i+j]= ((d>>(7-j))&1)*255;
-    }
-}
-
-static void yuy2ToY_c(uint8_t *dst, const uint8_t *src, int width,
-                      uint32_t *unused)
-{
-    int i;
-    for (i=0; i<width; i++)
-        dst[i]= src[2*i];
-}
-
-static void yuy2ToUV_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
-                       const uint8_t *src2, int width, uint32_t *unused)
-{
-    int i;
-    for (i=0; i<width; i++) {
-        dstU[i]= src1[4*i + 1];
-        dstV[i]= src1[4*i + 3];
-    }
-    assert(src1 == src2);
-}
-
-static void bswap16Y_c(uint8_t *_dst, const uint8_t *_src, int width, uint32_t *unused)
-{
-    int i;
-    const uint16_t *src = (const uint16_t *) _src;
-    uint16_t *dst = (uint16_t *) _dst;
-    for (i=0; i<width; i++) {
-        dst[i] = av_bswap16(src[i]);
-    }
-}
-
-static void bswap16UV_c(uint8_t *_dstU, uint8_t *_dstV, const uint8_t *_src1,
-                        const uint8_t *_src2, int width, uint32_t *unused)
-{
-    int i;
-    const uint16_t *src1 = (const uint16_t *) _src1,
-                   *src2 = (const uint16_t *) _src2;
-    uint16_t *dstU = (uint16_t *) _dstU, *dstV = (uint16_t *) _dstV;
-    for (i=0; i<width; i++) {
-        dstU[i] = av_bswap16(src1[i]);
-        dstV[i] = av_bswap16(src2[i]);
-    }
-}
-
-/* This is almost identical to the previous, end exists only because
- * yuy2ToY/UV)(dst, src+1, ...) would have 100% unaligned accesses. */
-static void uyvyToY_c(uint8_t *dst, const uint8_t *src, int width,
-                      uint32_t *unused)
-{
-    int i;
-    for (i=0; i<width; i++)
-        dst[i]= src[2*i+1];
-}
-
-static void uyvyToUV_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
-                       const uint8_t *src2, int width, uint32_t *unused)
-{
-    int i;
-    for (i=0; i<width; i++) {
-        dstU[i]= src1[4*i + 0];
-        dstV[i]= src1[4*i + 2];
-    }
-    assert(src1 == src2);
-}
-
-static av_always_inline void nvXXtoUV_c(uint8_t *dst1, uint8_t *dst2,
-                                        const uint8_t *src, int width)
-{
-    int i;
-    for (i = 0; i < width; i++) {
-        dst1[i] = src[2*i+0];
-        dst2[i] = src[2*i+1];
-    }
-}
-
-static void nv12ToUV_c(uint8_t *dstU, uint8_t *dstV,
-                       const uint8_t *src1, const uint8_t *src2,
-                       int width, uint32_t *unused)
-{
-    nvXXtoUV_c(dstU, dstV, src1, width);
-}
-
-static void nv21ToUV_c(uint8_t *dstU, uint8_t *dstV,
-                       const uint8_t *src1, const uint8_t *src2,
-                       int width, uint32_t *unused)
-{
-    nvXXtoUV_c(dstV, dstU, src1, width);
-}
-
-#define input_pixel(pos) (isBE(origin) ? AV_RB16(pos) : AV_RL16(pos))
-
-static void bgr24ToY_c(uint8_t *dst, const uint8_t *src,
-                       int width, uint32_t *unused)
-{
-    int i;
-    for (i=0; i<width; i++) {
-        int b= src[i*3+0];
-        int g= src[i*3+1];
-        int r= src[i*3+2];
-
-        dst[i]= ((RY*r + GY*g + BY*b + (33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
-    }
-}
-
-static void bgr24ToUV_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
-                        const uint8_t *src2, int width, uint32_t *unused)
-{
-    int i;
-    for (i=0; i<width; i++) {
-        int b= src1[3*i + 0];
-        int g= src1[3*i + 1];
-        int r= src1[3*i + 2];
-
-        dstU[i]= (RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT;
-        dstV[i]= (RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT;
-    }
-    assert(src1 == src2);
-}
-
-static void bgr24ToUV_half_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
-                             const uint8_t *src2, int width, uint32_t *unused)
-{
-    int i;
-    for (i=0; i<width; i++) {
-        int b= src1[6*i + 0] + src1[6*i + 3];
-        int g= src1[6*i + 1] + src1[6*i + 4];
-        int r= src1[6*i + 2] + src1[6*i + 5];
-
-        dstU[i]= (RU*r + GU*g + BU*b + (257<<RGB2YUV_SHIFT))>>(RGB2YUV_SHIFT+1);
-        dstV[i]= (RV*r + GV*g + BV*b + (257<<RGB2YUV_SHIFT))>>(RGB2YUV_SHIFT+1);
-    }
-    assert(src1 == src2);
-}
-
-static void rgb24ToY_c(uint8_t *dst, const uint8_t *src, int width,
-                       uint32_t *unused)
-{
-    int i;
-    for (i=0; i<width; i++) {
-        int r= src[i*3+0];
-        int g= src[i*3+1];
-        int b= src[i*3+2];
-
-        dst[i]= ((RY*r + GY*g + BY*b + (33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
-    }
-}
-
-static void rgb24ToUV_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
-                        const uint8_t *src2, int width, uint32_t *unused)
-{
-    int i;
-    assert(src1==src2);
-    for (i=0; i<width; i++) {
-        int r= src1[3*i + 0];
-        int g= src1[3*i + 1];
-        int b= src1[3*i + 2];
-
-        dstU[i]= (RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT;
-        dstV[i]= (RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT;
-    }
-}
-
-static void rgb24ToUV_half_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
-                             const uint8_t *src2, int width, uint32_t *unused)
-{
-    int i;
-    assert(src1==src2);
-    for (i=0; i<width; i++) {
-        int r= src1[6*i + 0] + src1[6*i + 3];
-        int g= src1[6*i + 1] + src1[6*i + 4];
-        int b= src1[6*i + 2] + src1[6*i + 5];
-
-        dstU[i]= (RU*r + GU*g + BU*b + (257<<RGB2YUV_SHIFT))>>(RGB2YUV_SHIFT+1);
-        dstV[i]= (RV*r + GV*g + BV*b + (257<<RGB2YUV_SHIFT))>>(RGB2YUV_SHIFT+1);
-    }
-}
-
-static void planar_rgb_to_y(uint8_t *dst, const uint8_t *src[4], int width)
-{
-    int i;
-    for (i = 0; i < width; i++) {
-        int g = src[0][i];
-        int b = src[1][i];
-        int r = src[2][i];
-
-        dst[i] = ((RY * r + GY * g + BY * b + (33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
-    }
-}
-
-static void planar_rgb16le_to_y(uint8_t *_dst, const uint8_t *_src[4], int width)
-{
-    int i;
-    const uint16_t **src = (const uint16_t **) _src;
-    uint16_t *dst = (uint16_t *) _dst;
-    for (i = 0; i < width; i++) {
-        int g = AV_RL16(src[0] + i);
-        int b = AV_RL16(src[1] + i);
-        int r = AV_RL16(src[2] + i);
-
-        dst[i] = ((RY * r + GY * g + BY * b + (33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
-    }
-}
-
-static void planar_rgb16be_to_y(uint8_t *_dst, const uint8_t *_src[4], int width)
-{
-    int i;
-    const uint16_t **src = (const uint16_t **) _src;
-    uint16_t *dst = (uint16_t *) _dst;
-    for (i = 0; i < width; i++) {
-        int g = AV_RB16(src[0] + i);
-        int b = AV_RB16(src[1] + i);
-        int r = AV_RB16(src[2] + i);
-
-        dst[i] = ((RY * r + GY * g + BY * b + (33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
-    }
-}
-
-static void planar_rgb_to_uv(uint8_t *dstU, uint8_t *dstV, const uint8_t *src[4], int width)
-{
-    int i;
-    for (i = 0; i < width; i++) {
-        int g = src[0][i];
-        int b = src[1][i];
-        int r = src[2][i];
-
-        dstU[i] = (RU * r + GU * g + BU * b + (257 << RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT + 1);
-        dstV[i] = (RV * r + GV * g + BV * b + (257 << RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT + 1);
-    }
-}
-
-static void planar_rgb16le_to_uv(uint8_t *_dstU, uint8_t *_dstV, const uint8_t *_src[4], int width)
-{
-    int i;
-    const uint16_t **src = (const uint16_t **) _src;
-    uint16_t *dstU = (uint16_t *) _dstU;
-    uint16_t *dstV = (uint16_t *) _dstV;
-    for (i = 0; i < width; i++) {
-        int g = AV_RL16(src[0] + i);
-        int b = AV_RL16(src[1] + i);
-        int r = AV_RL16(src[2] + i);
-
-        dstU[i] = (RU * r + GU * g + BU * b + (257 << RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT + 1);
-        dstV[i] = (RV * r + GV * g + BV * b + (257 << RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT + 1);
-    }
-}
-
-static void planar_rgb16be_to_uv(uint8_t *_dstU, uint8_t *_dstV, const uint8_t *_src[4], int width)
-{
-    int i;
-    const uint16_t **src = (const uint16_t **) _src;
-    uint16_t *dstU = (uint16_t *) _dstU;
-    uint16_t *dstV = (uint16_t *) _dstV;
-    for (i = 0; i < width; i++) {
-        int g = AV_RB16(src[0] + i);
-        int b = AV_RB16(src[1] + i);
-        int r = AV_RB16(src[2] + i);
-
-        dstU[i] = (RU * r + GU * g + BU * b + (257 << RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT + 1);
-        dstV[i] = (RV * r + GV * g + BV * b + (257 << RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT + 1);
-    }
-}
-
 static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW, const uint8_t *_src,
                            const int16_t *filter,
                            const int16_t *filterPos, int filterSize)
@@ -2697,173 +2143,7 @@ static av_cold void sws_init_swScale_c(SwsContext *c)
                                    &c->yuv2nv12cX, &c->yuv2packed1, &c->yuv2packed2,
                                    &c->yuv2packedX);
 
-    c->chrToYV12 = NULL;
-    switch(srcFormat) {
-        case PIX_FMT_YUYV422  : c->chrToYV12 = yuy2ToUV_c; break;
-        case PIX_FMT_UYVY422  : c->chrToYV12 = uyvyToUV_c; break;
-        case PIX_FMT_NV12     : c->chrToYV12 = nv12ToUV_c; break;
-        case PIX_FMT_NV21     : c->chrToYV12 = nv21ToUV_c; break;
-        case PIX_FMT_RGB8     :
-        case PIX_FMT_BGR8     :
-        case PIX_FMT_PAL8     :
-        case PIX_FMT_BGR4_BYTE:
-        case PIX_FMT_RGB4_BYTE: c->chrToYV12 = palToUV_c; break;
-        case PIX_FMT_GBRP9LE:
-        case PIX_FMT_GBRP10LE:
-        case PIX_FMT_GBRP16LE:  c->readChrPlanar = planar_rgb16le_to_uv; break;
-        case PIX_FMT_GBRP9BE:
-        case PIX_FMT_GBRP10BE:
-        case PIX_FMT_GBRP16BE:  c->readChrPlanar = planar_rgb16be_to_uv; break;
-        case PIX_FMT_GBRP:      c->readChrPlanar = planar_rgb_to_uv; break;
-#if HAVE_BIGENDIAN
-        case PIX_FMT_YUV444P9LE:
-        case PIX_FMT_YUV422P9LE:
-        case PIX_FMT_YUV420P9LE:
-        case PIX_FMT_YUV422P10LE:
-        case PIX_FMT_YUV444P10LE:
-        case PIX_FMT_YUV420P10LE:
-        case PIX_FMT_YUV420P16LE:
-        case PIX_FMT_YUV422P16LE:
-        case PIX_FMT_YUV444P16LE: c->chrToYV12 = bswap16UV_c; break;
-#else
-        case PIX_FMT_YUV444P9BE:
-        case PIX_FMT_YUV422P9BE:
-        case PIX_FMT_YUV420P9BE:
-        case PIX_FMT_YUV444P10BE:
-        case PIX_FMT_YUV422P10BE:
-        case PIX_FMT_YUV420P10BE:
-        case PIX_FMT_YUV420P16BE:
-        case PIX_FMT_YUV422P16BE:
-        case PIX_FMT_YUV444P16BE: c->chrToYV12 = bswap16UV_c; break;
-#endif
-    }
-    if (c->chrSrcHSubSample) {
-        switch(srcFormat) {
-        case PIX_FMT_RGB48BE : c->chrToYV12 = rgb48BEToUV_half_c; break;
-        case PIX_FMT_RGB48LE : c->chrToYV12 = rgb48LEToUV_half_c; break;
-        case PIX_FMT_BGR48BE : c->chrToYV12 = bgr48BEToUV_half_c; break;
-        case PIX_FMT_BGR48LE : c->chrToYV12 = bgr48LEToUV_half_c; break;
-        case PIX_FMT_RGB32   : c->chrToYV12 = bgr32ToUV_half_c;   break;
-        case PIX_FMT_RGB32_1 : c->chrToYV12 = bgr321ToUV_half_c;  break;
-        case PIX_FMT_BGR24   : c->chrToYV12 = bgr24ToUV_half_c;   break;
-        case PIX_FMT_BGR565LE: c->chrToYV12 = bgr16leToUV_half_c; break;
-        case PIX_FMT_BGR565BE: c->chrToYV12 = bgr16beToUV_half_c; break;
-        case PIX_FMT_BGR555LE: c->chrToYV12 = bgr15leToUV_half_c; break;
-        case PIX_FMT_BGR555BE: c->chrToYV12 = bgr15beToUV_half_c; break;
-        case PIX_FMT_BGR444LE: c->chrToYV12 = bgr12leToUV_half_c; break;
-        case PIX_FMT_BGR444BE: c->chrToYV12 = bgr12beToUV_half_c; break;
-        case PIX_FMT_BGR32   : c->chrToYV12 = rgb32ToUV_half_c;   break;
-        case PIX_FMT_BGR32_1 : c->chrToYV12 = rgb321ToUV_half_c;  break;
-        case PIX_FMT_RGB24   : c->chrToYV12 = rgb24ToUV_half_c;   break;
-        case PIX_FMT_RGB565LE: c->chrToYV12 = rgb16leToUV_half_c; break;
-        case PIX_FMT_RGB565BE: c->chrToYV12 = rgb16beToUV_half_c; break;
-        case PIX_FMT_RGB555LE: c->chrToYV12 = rgb15leToUV_half_c; break;
-        case PIX_FMT_RGB555BE: c->chrToYV12 = rgb15beToUV_half_c; break;
-        case PIX_FMT_RGB444LE: c->chrToYV12 = rgb12leToUV_half_c; break;
-        case PIX_FMT_RGB444BE: c->chrToYV12 = rgb12beToUV_half_c; break;
-        }
-    } else {
-        switch(srcFormat) {
-        case PIX_FMT_RGB48BE : c->chrToYV12 = rgb48BEToUV_c; break;
-        case PIX_FMT_RGB48LE : c->chrToYV12 = rgb48LEToUV_c; break;
-        case PIX_FMT_BGR48BE : c->chrToYV12 = bgr48BEToUV_c; break;
-        case PIX_FMT_BGR48LE : c->chrToYV12 = bgr48LEToUV_c; break;
-        case PIX_FMT_RGB32   : c->chrToYV12 = bgr32ToUV_c;   break;
-        case PIX_FMT_RGB32_1 : c->chrToYV12 = bgr321ToUV_c;  break;
-        case PIX_FMT_BGR24   : c->chrToYV12 = bgr24ToUV_c;   break;
-        case PIX_FMT_BGR565LE: c->chrToYV12 = bgr16leToUV_c; break;
-        case PIX_FMT_BGR565BE: c->chrToYV12 = bgr16beToUV_c; break;
-        case PIX_FMT_BGR555LE: c->chrToYV12 = bgr15leToUV_c; break;
-        case PIX_FMT_BGR555BE: c->chrToYV12 = bgr15beToUV_c; break;
-        case PIX_FMT_BGR444LE: c->chrToYV12 = bgr12leToUV_c; break;
-        case PIX_FMT_BGR444BE: c->chrToYV12 = bgr12beToUV_c; break;
-        case PIX_FMT_BGR32   : c->chrToYV12 = rgb32ToUV_c;   break;
-        case PIX_FMT_BGR32_1 : c->chrToYV12 = rgb321ToUV_c;  break;
-        case PIX_FMT_RGB24   : c->chrToYV12 = rgb24ToUV_c;   break;
-        case PIX_FMT_RGB565LE: c->chrToYV12 = rgb16leToUV_c; break;
-        case PIX_FMT_RGB565BE: c->chrToYV12 = rgb16beToUV_c; break;
-        case PIX_FMT_RGB555LE: c->chrToYV12 = rgb15leToUV_c; break;
-        case PIX_FMT_RGB555BE: c->chrToYV12 = rgb15beToUV_c; break;
-        case PIX_FMT_RGB444LE: c->chrToYV12 = rgb12leToUV_c; break;
-        case PIX_FMT_RGB444BE: c->chrToYV12 = rgb12beToUV_c; break;
-        }
-    }
-
-    c->lumToYV12 = NULL;
-    c->alpToYV12 = NULL;
-    switch (srcFormat) {
-    case PIX_FMT_GBRP9LE:
-    case PIX_FMT_GBRP10LE:
-    case PIX_FMT_GBRP16LE: c->readLumPlanar = planar_rgb16le_to_y; break;
-    case PIX_FMT_GBRP9BE:
-    case PIX_FMT_GBRP10BE:
-    case PIX_FMT_GBRP16BE: c->readLumPlanar = planar_rgb16be_to_y; break;
-    case PIX_FMT_GBRP:     c->readLumPlanar = planar_rgb_to_y; break;
-#if HAVE_BIGENDIAN
-    case PIX_FMT_YUV444P9LE:
-    case PIX_FMT_YUV422P9LE:
-    case PIX_FMT_YUV420P9LE:
-    case PIX_FMT_YUV444P10LE:
-    case PIX_FMT_YUV422P10LE:
-    case PIX_FMT_YUV420P10LE:
-    case PIX_FMT_YUV420P16LE:
-    case PIX_FMT_YUV422P16LE:
-    case PIX_FMT_YUV444P16LE:
-    case PIX_FMT_GRAY16LE: c->lumToYV12 = bswap16Y_c; break;
-#else
-    case PIX_FMT_YUV444P9BE:
-    case PIX_FMT_YUV422P9BE:
-    case PIX_FMT_YUV420P9BE:
-    case PIX_FMT_YUV444P10BE:
-    case PIX_FMT_YUV422P10BE:
-    case PIX_FMT_YUV420P10BE:
-    case PIX_FMT_YUV420P16BE:
-    case PIX_FMT_YUV422P16BE:
-    case PIX_FMT_YUV444P16BE:
-    case PIX_FMT_GRAY16BE: c->lumToYV12 = bswap16Y_c; break;
-#endif
-    case PIX_FMT_YUYV422  :
-    case PIX_FMT_Y400A    : c->lumToYV12 = yuy2ToY_c; break;
-    case PIX_FMT_UYVY422  : c->lumToYV12 = uyvyToY_c;    break;
-    case PIX_FMT_BGR24    : c->lumToYV12 = bgr24ToY_c;   break;
-    case PIX_FMT_BGR565LE : c->lumToYV12 = bgr16leToY_c; break;
-    case PIX_FMT_BGR565BE : c->lumToYV12 = bgr16beToY_c; break;
-    case PIX_FMT_BGR555LE : c->lumToYV12 = bgr15leToY_c; break;
-    case PIX_FMT_BGR555BE : c->lumToYV12 = bgr15beToY_c; break;
-    case PIX_FMT_BGR444LE : c->lumToYV12 = bgr12leToY_c; break;
-    case PIX_FMT_BGR444BE : c->lumToYV12 = bgr12beToY_c; break;
-    case PIX_FMT_RGB24    : c->lumToYV12 = rgb24ToY_c;   break;
-    case PIX_FMT_RGB565LE : c->lumToYV12 = rgb16leToY_c; break;
-    case PIX_FMT_RGB565BE : c->lumToYV12 = rgb16beToY_c; break;
-    case PIX_FMT_RGB555LE : c->lumToYV12 = rgb15leToY_c; break;
-    case PIX_FMT_RGB555BE : c->lumToYV12 = rgb15beToY_c; break;
-    case PIX_FMT_RGB444LE : c->lumToYV12 = rgb12leToY_c; break;
-    case PIX_FMT_RGB444BE : c->lumToYV12 = rgb12beToY_c; break;
-    case PIX_FMT_RGB8     :
-    case PIX_FMT_BGR8     :
-    case PIX_FMT_PAL8     :
-    case PIX_FMT_BGR4_BYTE:
-    case PIX_FMT_RGB4_BYTE: c->lumToYV12 = palToY_c; break;
-    case PIX_FMT_MONOBLACK: c->lumToYV12 = monoblack2Y_c; break;
-    case PIX_FMT_MONOWHITE: c->lumToYV12 = monowhite2Y_c; break;
-    case PIX_FMT_RGB32  : c->lumToYV12 = bgr32ToY_c;  break;
-    case PIX_FMT_RGB32_1: c->lumToYV12 = bgr321ToY_c; break;
-    case PIX_FMT_BGR32  : c->lumToYV12 = rgb32ToY_c;  break;
-    case PIX_FMT_BGR32_1: c->lumToYV12 = rgb321ToY_c; break;
-    case PIX_FMT_RGB48BE: c->lumToYV12 = rgb48BEToY_c; break;
-    case PIX_FMT_RGB48LE: c->lumToYV12 = rgb48LEToY_c; break;
-    case PIX_FMT_BGR48BE: c->lumToYV12 = bgr48BEToY_c; break;
-    case PIX_FMT_BGR48LE: c->lumToYV12 = bgr48LEToY_c; break;
-    }
-    if (c->alpPixBuf) {
-        switch (srcFormat) {
-        case PIX_FMT_BGRA:
-        case PIX_FMT_RGBA:  c->alpToYV12 = rgbaToA_c; break;
-        case PIX_FMT_ABGR:
-        case PIX_FMT_ARGB:  c->alpToYV12 = abgrToA_c; break;
-        case PIX_FMT_Y400A: c->alpToYV12 = uyvyToY_c; break;
-        }
-    }
+    ff_sws_init_input_funcs(c);
 
     if (c->srcBpc == 8) {
         if (c->dstBpc <= 10) {
diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h
index 3436b92788..6d77608a59 100644
--- a/libswscale/swscale_internal.h
+++ b/libswscale/swscale_internal.h
@@ -649,6 +649,7 @@ void ff_swscale_get_unscaled_altivec(SwsContext *c);
  */
 SwsFunc ff_getSwsFunc(SwsContext *c);
 
+void ff_sws_init_input_funcs(SwsContext *c);
 void ff_sws_init_swScale_altivec(SwsContext *c);
 void ff_sws_init_swScale_mmx(SwsContext *c);