adding ffmpeg specific version

1 files changed, 1146 insertions, 0 deletions

diff --git a/ffmpeg1/libswscale/swscale_unscaled.c b/ffmpeg1/libswscale/swscale_unscaled.c
new file mode 100644
index 0000000..4a22fca
--- /dev/null
+++ b/ffmpeg1/libswscale/swscale_unscaled.c
@@ -0,0 +1,1146 @@
+/*
+ * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <inttypes.h>
+#include <string.h>
+#include <math.h>
+#include <stdio.h>
+#include "config.h"
+#include "swscale.h"
+#include "swscale_internal.h"
+#include "rgb2rgb.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/cpu.h"
+#include "libavutil/avutil.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/bswap.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/avassert.h"
+
+DECLARE_ALIGNED(8, const uint8_t, dithers)[8][8][8]={
+{
+  {   0,  1,  0,  1,  0,  1,  0,  1,},
+  {   1,  0,  1,  0,  1,  0,  1,  0,},
+  {   0,  1,  0,  1,  0,  1,  0,  1,},
+  {   1,  0,  1,  0,  1,  0,  1,  0,},
+  {   0,  1,  0,  1,  0,  1,  0,  1,},
+  {   1,  0,  1,  0,  1,  0,  1,  0,},
+  {   0,  1,  0,  1,  0,  1,  0,  1,},
+  {   1,  0,  1,  0,  1,  0,  1,  0,},
+},{
+  {   1,  2,  1,  2,  1,  2,  1,  2,},
+  {   3,  0,  3,  0,  3,  0,  3,  0,},
+  {   1,  2,  1,  2,  1,  2,  1,  2,},
+  {   3,  0,  3,  0,  3,  0,  3,  0,},
+  {   1,  2,  1,  2,  1,  2,  1,  2,},
+  {   3,  0,  3,  0,  3,  0,  3,  0,},
+  {   1,  2,  1,  2,  1,  2,  1,  2,},
+  {   3,  0,  3,  0,  3,  0,  3,  0,},
+},{
+  {   2,  4,  3,  5,  2,  4,  3,  5,},
+  {   6,  0,  7,  1,  6,  0,  7,  1,},
+  {   3,  5,  2,  4,  3,  5,  2,  4,},
+  {   7,  1,  6,  0,  7,  1,  6,  0,},
+  {   2,  4,  3,  5,  2,  4,  3,  5,},
+  {   6,  0,  7,  1,  6,  0,  7,  1,},
+  {   3,  5,  2,  4,  3,  5,  2,  4,},
+  {   7,  1,  6,  0,  7,  1,  6,  0,},
+},{
+  {   4,  8,  7, 11,  4,  8,  7, 11,},
+  {  12,  0, 15,  3, 12,  0, 15,  3,},
+  {   6, 10,  5,  9,  6, 10,  5,  9,},
+  {  14,  2, 13,  1, 14,  2, 13,  1,},
+  {   4,  8,  7, 11,  4,  8,  7, 11,},
+  {  12,  0, 15,  3, 12,  0, 15,  3,},
+  {   6, 10,  5,  9,  6, 10,  5,  9,},
+  {  14,  2, 13,  1, 14,  2, 13,  1,},
+},{
+  {   9, 17, 15, 23,  8, 16, 14, 22,},
+  {  25,  1, 31,  7, 24,  0, 30,  6,},
+  {  13, 21, 11, 19, 12, 20, 10, 18,},
+  {  29,  5, 27,  3, 28,  4, 26,  2,},
+  {   8, 16, 14, 22,  9, 17, 15, 23,},
+  {  24,  0, 30,  6, 25,  1, 31,  7,},
+  {  12, 20, 10, 18, 13, 21, 11, 19,},
+  {  28,  4, 26,  2, 29,  5, 27,  3,},
+},{
+  {  18, 34, 30, 46, 17, 33, 29, 45,},
+  {  50,  2, 62, 14, 49,  1, 61, 13,},
+  {  26, 42, 22, 38, 25, 41, 21, 37,},
+  {  58, 10, 54,  6, 57,  9, 53,  5,},
+  {  16, 32, 28, 44, 19, 35, 31, 47,},
+  {  48,  0, 60, 12, 51,  3, 63, 15,},
+  {  24, 40, 20, 36, 27, 43, 23, 39,},
+  {  56,  8, 52,  4, 59, 11, 55,  7,},
+},{
+  {  18, 34, 30, 46, 17, 33, 29, 45,},
+  {  50,  2, 62, 14, 49,  1, 61, 13,},
+  {  26, 42, 22, 38, 25, 41, 21, 37,},
+  {  58, 10, 54,  6, 57,  9, 53,  5,},
+  {  16, 32, 28, 44, 19, 35, 31, 47,},
+  {  48,  0, 60, 12, 51,  3, 63, 15,},
+  {  24, 40, 20, 36, 27, 43, 23, 39,},
+  {  56,  8, 52,  4, 59, 11, 55,  7,},
+},{
+  {  36, 68, 60, 92, 34, 66, 58, 90,},
+  { 100,  4,124, 28, 98,  2,122, 26,},
+  {  52, 84, 44, 76, 50, 82, 42, 74,},
+  { 116, 20,108, 12,114, 18,106, 10,},
+  {  32, 64, 56, 88, 38, 70, 62, 94,},
+  {  96,  0,120, 24,102,  6,126, 30,},
+  {  48, 80, 40, 72, 54, 86, 46, 78,},
+  { 112, 16,104,  8,118, 22,110, 14,},
+}};
+
+const uint16_t dither_scale[15][16]={
+{    2,    3,    3,    5,    5,    5,    5,    5,    5,    5,    5,    5,    5,    5,    5,    5,},
+{    2,    3,    7,    7,   13,   13,   25,   25,   25,   25,   25,   25,   25,   25,   25,   25,},
+{    3,    3,    4,   15,   15,   29,   57,   57,   57,  113,  113,  113,  113,  113,  113,  113,},
+{    3,    4,    4,    5,   31,   31,   61,  121,  241,  241,  241,  241,  481,  481,  481,  481,},
+{    3,    4,    5,    5,    6,   63,   63,  125,  249,  497,  993,  993,  993,  993,  993, 1985,},
+{    3,    5,    6,    6,    6,    7,  127,  127,  253,  505, 1009, 2017, 4033, 4033, 4033, 4033,},
+{    3,    5,    6,    7,    7,    7,    8,  255,  255,  509, 1017, 2033, 4065, 8129,16257,16257,},
+{    3,    5,    6,    8,    8,    8,    8,    9,  511,  511, 1021, 2041, 4081, 8161,16321,32641,},
+{    3,    5,    7,    8,    9,    9,    9,    9,   10, 1023, 1023, 2045, 4089, 8177,16353,32705,},
+{    3,    5,    7,    8,   10,   10,   10,   10,   10,   11, 2047, 2047, 4093, 8185,16369,32737,},
+{    3,    5,    7,    8,   10,   11,   11,   11,   11,   11,   12, 4095, 4095, 8189,16377,32753,},
+{    3,    5,    7,    9,   10,   12,   12,   12,   12,   12,   12,   13, 8191, 8191,16381,32761,},
+{    3,    5,    7,    9,   10,   12,   13,   13,   13,   13,   13,   13,   14,16383,16383,32765,},
+{    3,    5,    7,    9,   10,   12,   14,   14,   14,   14,   14,   14,   14,   15,32767,32767,},
+{    3,    5,    7,    9,   11,   12,   14,   15,   15,   15,   15,   15,   15,   15,   16,65535,},
+};
+
+
+static void fillPlane(uint8_t *plane, int stride, int width, int height, int y,
+                      uint8_t val)
+{
+    int i;
+    uint8_t *ptr = plane + stride * y;
+    for (i = 0; i < height; i++) {
+        memset(ptr, val, width);
+        ptr += stride;
+    }
+}
+
+static void copyPlane(const uint8_t *src, int srcStride,
+                      int srcSliceY, int srcSliceH, int width,
+                      uint8_t *dst, int dstStride)
+{
+    dst += dstStride * srcSliceY;
+    if (dstStride == srcStride && srcStride > 0) {
+        memcpy(dst, src, srcSliceH * dstStride);
+    } else {
+        int i;
+        for (i = 0; i < srcSliceH; i++) {
+            memcpy(dst, src, width);
+            src += srcStride;
+            dst += dstStride;
+        }
+    }
+}
+
+static int planarToNv12Wrapper(SwsContext *c, const uint8_t *src[],
+                               int srcStride[], int srcSliceY,
+                               int srcSliceH, uint8_t *dstParam[],
+                               int dstStride[])
+{
+    uint8_t *dst = dstParam[1] + dstStride[1] * srcSliceY / 2;
+
+    copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
+              dstParam[0], dstStride[0]);
+
+    if (c->dstFormat == AV_PIX_FMT_NV12)
+        interleaveBytes(src[1], src[2], dst, c->srcW / 2, srcSliceH / 2,
+                        srcStride[1], srcStride[2], dstStride[0]);
+    else
+        interleaveBytes(src[2], src[1], dst, c->srcW / 2, srcSliceH / 2,
+                        srcStride[2], srcStride[1], dstStride[0]);
+
+    return srcSliceH;
+}
+
+static int planarToYuy2Wrapper(SwsContext *c, const uint8_t *src[],
+                               int srcStride[], int srcSliceY, int srcSliceH,
+                               uint8_t *dstParam[], int dstStride[])
+{
+    uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
+
+    yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
+               srcStride[1], dstStride[0]);
+
+    return srcSliceH;
+}
+
+static int planarToUyvyWrapper(SwsContext *c, const uint8_t *src[],
+                               int srcStride[], int srcSliceY, int srcSliceH,
+                               uint8_t *dstParam[], int dstStride[])
+{
+    uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
+
+    yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
+               srcStride[1], dstStride[0]);
+
+    return srcSliceH;
+}
+
+static int yuv422pToYuy2Wrapper(SwsContext *c, const uint8_t *src[],
+                                int srcStride[], int srcSliceY, int srcSliceH,
+                                uint8_t *dstParam[], int dstStride[])
+{
+    uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
+
+    yuv422ptoyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
+                  srcStride[1], dstStride[0]);
+
+    return srcSliceH;
+}
+
+static int yuv422pToUyvyWrapper(SwsContext *c, const uint8_t *src[],
+                                int srcStride[], int srcSliceY, int srcSliceH,
+                                uint8_t *dstParam[], int dstStride[])
+{
+    uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
+
+    yuv422ptouyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
+                  srcStride[1], dstStride[0]);
+
+    return srcSliceH;
+}
+
+static int yuyvToYuv420Wrapper(SwsContext *c, const uint8_t *src[],
+                               int srcStride[], int srcSliceY, int srcSliceH,
+                               uint8_t *dstParam[], int dstStride[])
+{
+    uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
+    uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;
+    uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;
+
+    yuyvtoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
+                 dstStride[1], srcStride[0]);
+
+    if (dstParam[3])
+        fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
+
+    return srcSliceH;
+}
+
+static int yuyvToYuv422Wrapper(SwsContext *c, const uint8_t *src[],
+                               int srcStride[], int srcSliceY, int srcSliceH,
+                               uint8_t *dstParam[], int dstStride[])
+{
+    uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
+    uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;
+    uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;
+
+    yuyvtoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
+                 dstStride[1], srcStride[0]);
+
+    return srcSliceH;
+}
+
+static int uyvyToYuv420Wrapper(SwsContext *c, const uint8_t *src[],
+                               int srcStride[], int srcSliceY, int srcSliceH,
+                               uint8_t *dstParam[], int dstStride[])
+{
+    uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
+    uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;
+    uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;
+
+    uyvytoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
+                 dstStride[1], srcStride[0]);
+
+    if (dstParam[3])
+        fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
+
+    return srcSliceH;
+}
+
+static int uyvyToYuv422Wrapper(SwsContext *c, const uint8_t *src[],
+                               int srcStride[], int srcSliceY, int srcSliceH,
+                               uint8_t *dstParam[], int dstStride[])
+{
+    uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
+    uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;
+    uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;
+
+    uyvytoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
+                 dstStride[1], srcStride[0]);
+
+    return srcSliceH;
+}
+
+static void gray8aToPacked32(const uint8_t *src, uint8_t *dst, int num_pixels,
+                             const uint8_t *palette)
+{
+    int i;
+    for (i = 0; i < num_pixels; i++)
+        ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | (src[(i << 1) + 1] << 24);
+}
+
+static void gray8aToPacked32_1(const uint8_t *src, uint8_t *dst, int num_pixels,
+                               const uint8_t *palette)
+{
+    int i;
+
+    for (i = 0; i < num_pixels; i++)
+        ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | src[(i << 1) + 1];
+}
+
+static void gray8aToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels,
+                             const uint8_t *palette)
+{
+    int i;
+
+    for (i = 0; i < num_pixels; i++) {
+        //FIXME slow?
+        dst[0] = palette[src[i << 1] * 4 + 0];
+        dst[1] = palette[src[i << 1] * 4 + 1];
+        dst[2] = palette[src[i << 1] * 4 + 2];
+        dst += 3;
+    }
+}
+
+static int packed_16bpc_bswap(SwsContext *c, const uint8_t *src[],
+                              int srcStride[], int srcSliceY, int srcSliceH,
+                              uint8_t *dst[], int dstStride[])
+{
+    int i, j;
+    int srcstr = srcStride[0] >> 1;
+    int dststr = dstStride[0] >> 1;
+    uint16_t       *dstPtr =       (uint16_t *) dst[0];
+    const uint16_t *srcPtr = (const uint16_t *) src[0];
+    int min_stride         = FFMIN(srcstr, dststr);
+
+    for (i = 0; i < srcSliceH; i++) {
+        for (j = 0; j < min_stride; j++) {
+            dstPtr[j] = av_bswap16(srcPtr[j]);
+        }
+        srcPtr += srcstr;
+        dstPtr += dststr;
+    }
+
+    return srcSliceH;
+}
+
+static int palToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
+                           int srcSliceY, int srcSliceH, uint8_t *dst[],
+                           int dstStride[])
+{
+    const enum AVPixelFormat srcFormat = c->srcFormat;
+    const enum AVPixelFormat dstFormat = c->dstFormat;
+    void (*conv)(const uint8_t *src, uint8_t *dst, int num_pixels,
+                 const uint8_t *palette) = NULL;
+    int i;
+    uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
+    const uint8_t *srcPtr = src[0];
+
+    if (srcFormat == AV_PIX_FMT_GRAY8A) {
+        switch (dstFormat) {
+        case AV_PIX_FMT_RGB32  : conv = gray8aToPacked32; break;
+        case AV_PIX_FMT_BGR32  : conv = gray8aToPacked32; break;
+        case AV_PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;
+        case AV_PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;
+        case AV_PIX_FMT_RGB24  : conv = gray8aToPacked24; break;
+        case AV_PIX_FMT_BGR24  : conv = gray8aToPacked24; break;
+        }
+    } else if (usePal(srcFormat)) {
+        switch (dstFormat) {
+        case AV_PIX_FMT_RGB32  : conv = sws_convertPalette8ToPacked32; break;
+        case AV_PIX_FMT_BGR32  : conv = sws_convertPalette8ToPacked32; break;
+        case AV_PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;
+        case AV_PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;
+        case AV_PIX_FMT_RGB24  : conv = sws_convertPalette8ToPacked24; break;
+        case AV_PIX_FMT_BGR24  : conv = sws_convertPalette8ToPacked24; break;
+        }
+    }
+
+    if (!conv)
+        av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
+               av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
+    else {
+        for (i = 0; i < srcSliceH; i++) {
+            conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);
+            srcPtr += srcStride[0];
+            dstPtr += dstStride[0];
+        }
+    }
+
+    return srcSliceH;
+}
+
+static void gbr24ptopacked24(const uint8_t *src[], int srcStride[],
+                             uint8_t *dst, int dstStride, int srcSliceH,
+                             int width)
+{
+    int x, h, i;
+    for (h = 0; h < srcSliceH; h++) {
+        uint8_t *dest = dst + dstStride * h;
+        for (x = 0; x < width; x++) {
+            *dest++ = src[0][x];
+            *dest++ = src[1][x];
+            *dest++ = src[2][x];
+        }
+
+        for (i = 0; i < 3; i++)
+            src[i] += srcStride[i];
+    }
+}
+
+static void gbr24ptopacked32(const uint8_t *src[], int srcStride[],
+                             uint8_t *dst, int dstStride, int srcSliceH,
+                             int alpha_first, int width)
+{
+    int x, h, i;
+    for (h = 0; h < srcSliceH; h++) {
+        uint8_t *dest = dst + dstStride * h;
+
+        if (alpha_first) {
+            for (x = 0; x < width; x++) {
+                *dest++ = 0xff;
+                *dest++ = src[0][x];
+                *dest++ = src[1][x];
+                *dest++ = src[2][x];
+            }
+        } else {
+            for (x = 0; x < width; x++) {
+                *dest++ = src[0][x];
+                *dest++ = src[1][x];
+                *dest++ = src[2][x];
+                *dest++ = 0xff;
+            }
+        }
+
+        for (i = 0; i < 3; i++)
+            src[i] += srcStride[i];
+    }
+}
+
+static int planarRgbToRgbWrapper(SwsContext *c, const uint8_t *src[],
+                                 int srcStride[], int srcSliceY, int srcSliceH,
+                                 uint8_t *dst[], int dstStride[])
+{
+    int alpha_first = 0;
+    const uint8_t *src102[] = { src[1], src[0], src[2] };
+    const uint8_t *src201[] = { src[2], src[0], src[1] };
+    int stride102[] = { srcStride[1], srcStride[0], srcStride[2] };
+    int stride201[] = { srcStride[2], srcStride[0], srcStride[1] };
+
+    if (c->srcFormat != AV_PIX_FMT_GBRP) {
+        av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
+               av_get_pix_fmt_name(c->srcFormat),
+               av_get_pix_fmt_name(c->dstFormat));
+        return srcSliceH;
+    }
+
+    switch (c->dstFormat) {
+    case AV_PIX_FMT_BGR24:
+        gbr24ptopacked24(src102, stride102,
+                         dst[0] + srcSliceY * dstStride[0], dstStride[0],
+                         srcSliceH, c->srcW);
+        break;
+
+    case AV_PIX_FMT_RGB24:
+        gbr24ptopacked24(src201, stride201,
+                         dst[0] + srcSliceY * dstStride[0], dstStride[0],
+                         srcSliceH, c->srcW);
+        break;
+
+    case AV_PIX_FMT_ARGB:
+        alpha_first = 1;
+    case AV_PIX_FMT_RGBA:
+        gbr24ptopacked32(src201, stride201,
+                         dst[0] + srcSliceY * dstStride[0], dstStride[0],
+                         srcSliceH, alpha_first, c->srcW);
+        break;
+
+    case AV_PIX_FMT_ABGR:
+        alpha_first = 1;
+    case AV_PIX_FMT_BGRA:
+        gbr24ptopacked32(src102, stride102,
+                         dst[0] + srcSliceY * dstStride[0], dstStride[0],
+                         srcSliceH, alpha_first, c->srcW);
+        break;
+
+    default:
+        av_log(c, AV_LOG_ERROR,
+               "unsupported planar RGB conversion %s -> %s\n",
+               av_get_pix_fmt_name(c->srcFormat),
+               av_get_pix_fmt_name(c->dstFormat));
+    }
+
+    return srcSliceH;
+}
+
+static void packedtogbr24p(const uint8_t *src, int srcStride,
+                           uint8_t *dst[], int dstStride[], int srcSliceH,
+                           int alpha_first, int inc_size, int width)
+{
+    uint8_t *dest[3];
+    int x, h;
+
+    dest[0] = dst[0];
+    dest[1] = dst[1];
+    dest[2] = dst[2];
+
+    if (alpha_first)
+        src++;
+
+    for (h = 0; h < srcSliceH; h++) {
+        for (x = 0; x < width; x++) {
+            dest[0][x] = src[0];
+            dest[1][x] = src[1];
+            dest[2][x] = src[2];
+
+            src += inc_size;
+        }
+        src     += srcStride - width * inc_size;
+        dest[0] += dstStride[0];
+        dest[1] += dstStride[1];
+        dest[2] += dstStride[2];
+    }
+}
+
+static int rgbToPlanarRgbWrapper(SwsContext *c, const uint8_t *src[],
+                                 int srcStride[], int srcSliceY, int srcSliceH,
+                                 uint8_t *dst[], int dstStride[])
+{
+    int alpha_first = 0;
+    int stride102[] = { dstStride[1], dstStride[0], dstStride[2] };
+    int stride201[] = { dstStride[2], dstStride[0], dstStride[1] };
+    uint8_t *dst102[] = { dst[1] + srcSliceY * dstStride[1],
+                          dst[0] + srcSliceY * dstStride[0],
+                          dst[2] + srcSliceY * dstStride[2] };
+    uint8_t *dst201[] = { dst[2] + srcSliceY * dstStride[2],
+                          dst[0] + srcSliceY * dstStride[0],
+                          dst[1] + srcSliceY * dstStride[1] };
+
+    switch (c->srcFormat) {
+    case AV_PIX_FMT_RGB24:
+        packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst201,
+                       stride201, srcSliceH, alpha_first, 3, c->srcW);
+        break;
+    case AV_PIX_FMT_BGR24:
+        packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst102,
+                       stride102, srcSliceH, alpha_first, 3, c->srcW);
+        break;
+    case AV_PIX_FMT_ARGB:
+        alpha_first = 1;
+    case AV_PIX_FMT_RGBA:
+        packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst201,
+                       stride201, srcSliceH, alpha_first, 4, c->srcW);
+        break;
+    case AV_PIX_FMT_ABGR:
+        alpha_first = 1;
+    case AV_PIX_FMT_BGRA:
+        packedtogbr24p((const uint8_t *) src[0], srcStride[0], dst102,
+                       stride102, srcSliceH, alpha_first, 4, c->srcW);
+        break;
+    default:
+        av_log(c, AV_LOG_ERROR,
+               "unsupported planar RGB conversion %s -> %s\n",
+               av_get_pix_fmt_name(c->srcFormat),
+               av_get_pix_fmt_name(c->dstFormat));
+    }
+
+    return srcSliceH;
+}
+
+#define isRGBA32(x) (            \
+           (x) == AV_PIX_FMT_ARGB   \
+        || (x) == AV_PIX_FMT_RGBA   \
+        || (x) == AV_PIX_FMT_BGRA   \
+        || (x) == AV_PIX_FMT_ABGR   \
+        )
+
+#define isRGBA64(x) (                \
+           (x) == AV_PIX_FMT_RGBA64LE   \
+        || (x) == AV_PIX_FMT_RGBA64BE   \
+        || (x) == AV_PIX_FMT_BGRA64LE   \
+        || (x) == AV_PIX_FMT_BGRA64BE   \
+        )
+
+#define isRGB48(x) (                \
+           (x) == AV_PIX_FMT_RGB48LE   \
+        || (x) == AV_PIX_FMT_RGB48BE   \
+        || (x) == AV_PIX_FMT_BGR48LE   \
+        || (x) == AV_PIX_FMT_BGR48BE   \
+        )
+
+/* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
+typedef void (* rgbConvFn) (const uint8_t *, uint8_t *, int);
+static rgbConvFn findRgbConvFn(SwsContext *c)
+{
+    const enum AVPixelFormat srcFormat = c->srcFormat;
+    const enum AVPixelFormat dstFormat = c->dstFormat;
+    const int srcId = c->srcFormatBpp;
+    const int dstId = c->dstFormatBpp;
+    rgbConvFn conv = NULL;
+
+#define IS_NOT_NE(bpp, desc) \
+    (((bpp + 7) >> 3) == 2 && \
+     (!(desc->flags & PIX_FMT_BE) != !HAVE_BIGENDIAN))
+
+#define CONV_IS(src, dst) (srcFormat == AV_PIX_FMT_##src && dstFormat == AV_PIX_FMT_##dst)
+
+    if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {
+        if (     CONV_IS(ABGR, RGBA)
+              || CONV_IS(ARGB, BGRA)
+              || CONV_IS(BGRA, ARGB)
+              || CONV_IS(RGBA, ABGR)) conv = shuffle_bytes_3210;
+        else if (CONV_IS(ABGR, ARGB)
+              || CONV_IS(ARGB, ABGR)) conv = shuffle_bytes_0321;
+        else if (CONV_IS(ABGR, BGRA)
+              || CONV_IS(ARGB, RGBA)) conv = shuffle_bytes_1230;
+        else if (CONV_IS(BGRA, RGBA)
+              || CONV_IS(RGBA, BGRA)) conv = shuffle_bytes_2103;
+        else if (CONV_IS(BGRA, ABGR)
+              || CONV_IS(RGBA, ARGB)) conv = shuffle_bytes_3012;
+    } else if (isRGB48(srcFormat) && isRGB48(dstFormat)) {
+        if      (CONV_IS(RGB48LE, BGR48LE)
+              || CONV_IS(BGR48LE, RGB48LE)
+              || CONV_IS(RGB48BE, BGR48BE)
+              || CONV_IS(BGR48BE, RGB48BE)) conv = rgb48tobgr48_nobswap;
+        else if (CONV_IS(RGB48LE, BGR48BE)
+              || CONV_IS(BGR48LE, RGB48BE)
+              || CONV_IS(RGB48BE, BGR48LE)
+              || CONV_IS(BGR48BE, RGB48LE)) conv = rgb48tobgr48_bswap;
+    } else if (isRGBA64(srcFormat) && isRGB48(dstFormat)) {
+        if      (CONV_IS(RGBA64LE, BGR48LE)
+              || CONV_IS(BGRA64LE, RGB48LE)
+              || CONV_IS(RGBA64BE, BGR48BE)
+              || CONV_IS(BGRA64BE, RGB48BE)) conv = rgb64tobgr48_nobswap;
+        else if (CONV_IS(RGBA64LE, BGR48BE)
+              || CONV_IS(BGRA64LE, RGB48BE)
+              || CONV_IS(RGBA64BE, BGR48LE)
+              || CONV_IS(BGRA64BE, RGB48LE)) conv = rgb64tobgr48_bswap;
+        else if (CONV_IS(RGBA64LE, RGB48LE)
+              || CONV_IS(BGRA64LE, BGR48LE)
+              || CONV_IS(RGBA64BE, RGB48BE)
+              || CONV_IS(BGRA64BE, BGR48BE)) conv = rgb64to48_nobswap;
+        else if (CONV_IS(RGBA64LE, RGB48BE)
+              || CONV_IS(BGRA64LE, BGR48BE)
+              || CONV_IS(RGBA64BE, RGB48LE)
+              || CONV_IS(BGRA64BE, BGR48LE)) conv = rgb64to48_bswap;
+    } else
+    /* BGR -> BGR */
+    if ((isBGRinInt(srcFormat) && isBGRinInt(dstFormat)) ||
+        (isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {
+        switch (srcId | (dstId << 16)) {
+        case 0x000F000C: conv = rgb12to15; break;
+        case 0x000F0010: conv = rgb16to15; break;
+        case 0x000F0018: conv = rgb24to15; break;
+        case 0x000F0020: conv = rgb32to15; break;
+        case 0x0010000F: conv = rgb15to16; break;
+        case 0x00100018: conv = rgb24to16; break;
+        case 0x00100020: conv = rgb32to16; break;
+        case 0x0018000F: conv = rgb15to24; break;
+        case 0x00180010: conv = rgb16to24; break;
+        case 0x00180020: conv = rgb32to24; break;
+        case 0x0020000F: conv = rgb15to32; break;
+        case 0x00200010: conv = rgb16to32; break;
+        case 0x00200018: conv = rgb24to32; break;
+        }
+    } else if ((isBGRinInt(srcFormat) && isRGBinInt(dstFormat)) ||
+               (isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {
+        switch (srcId | (dstId << 16)) {
+        case 0x000C000C: conv = rgb12tobgr12; break;
+        case 0x000F000F: conv = rgb15tobgr15; break;
+        case 0x000F0010: conv = rgb16tobgr15; break;
+        case 0x000F0018: conv = rgb24tobgr15; break;
+        case 0x000F0020: conv = rgb32tobgr15; break;
+        case 0x0010000F: conv = rgb15tobgr16; break;
+        case 0x00100010: conv = rgb16tobgr16; break;
+        case 0x00100018: conv = rgb24tobgr16; break;
+        case 0x00100020: conv = rgb32tobgr16; break;
+        case 0x0018000F: conv = rgb15tobgr24; break;
+        case 0x00180010: conv = rgb16tobgr24; break;
+        case 0x00180018: conv = rgb24tobgr24; break;
+        case 0x00180020: conv = rgb32tobgr24; break;
+        case 0x0020000F: conv = rgb15tobgr32; break;
+        case 0x00200010: conv = rgb16tobgr32; break;
+        case 0x00200018: conv = rgb24tobgr32; break;
+        }
+    }
+
+    if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) && !isRGBA32(srcFormat) && ALT32_CORR<0)
+        return NULL;
+
+    return conv;
+}
+
+/* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
+static int rgbToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
+                           int srcSliceY, int srcSliceH, uint8_t *dst[],
+                           int dstStride[])
+
+{
+    const enum AVPixelFormat srcFormat = c->srcFormat;
+    const enum AVPixelFormat dstFormat = c->dstFormat;
+    const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);
+    const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);
+    const int srcBpp = (c->srcFormatBpp + 7) >> 3;
+    const int dstBpp = (c->dstFormatBpp + 7) >> 3;
+    rgbConvFn conv = findRgbConvFn(c);
+
+    if (!conv) {
+        av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
+               av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
+    } else {
+        const uint8_t *srcPtr = src[0];
+              uint8_t *dstPtr = dst[0];
+        int src_bswap = IS_NOT_NE(c->srcFormatBpp, desc_src);
+        int dst_bswap = IS_NOT_NE(c->dstFormatBpp, desc_dst);
+
+        if ((srcFormat == AV_PIX_FMT_RGB32_1 || srcFormat == AV_PIX_FMT_BGR32_1) &&
+            !isRGBA32(dstFormat))
+            srcPtr += ALT32_CORR;
+
+        if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) &&
+            !isRGBA32(srcFormat))
+            dstPtr += ALT32_CORR;
+
+        if (dstStride[0] * srcBpp == srcStride[0] * dstBpp && srcStride[0] > 0 &&
+            !(srcStride[0] % srcBpp) && !dst_bswap && !src_bswap)
+            conv(srcPtr, dstPtr + dstStride[0] * srcSliceY,
+                 srcSliceH * srcStride[0]);
+        else {
+            int i, j;
+            dstPtr += dstStride[0] * srcSliceY;
+
+            for (i = 0; i < srcSliceH; i++) {
+                if(src_bswap) {
+                    for(j=0; j<c->srcW; j++)
+                        ((uint16_t*)c->formatConvBuffer)[j] = av_bswap16(((uint16_t*)srcPtr)[j]);
+                    conv(c->formatConvBuffer, dstPtr, c->srcW * srcBpp);
+                }else
+                    conv(srcPtr, dstPtr, c->srcW * srcBpp);
+                if(dst_bswap)
+                    for(j=0; j<c->srcW; j++)
+                        ((uint16_t*)dstPtr)[j] = av_bswap16(((uint16_t*)dstPtr)[j]);
+                srcPtr += srcStride[0];
+                dstPtr += dstStride[0];
+            }
+        }
+    }
+    return srcSliceH;
+}
+
+static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
+                              int srcStride[], int srcSliceY, int srcSliceH,
+                              uint8_t *dst[], int dstStride[])
+{
+    rgb24toyv12(
+        src[0],
+        dst[0] +  srcSliceY       * dstStride[0],
+        dst[1] + (srcSliceY >> 1) * dstStride[1],
+        dst[2] + (srcSliceY >> 1) * dstStride[2],
+        c->srcW, srcSliceH,
+        dstStride[0], dstStride[1], srcStride[0]);
+    if (dst[3])
+        fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
+    return srcSliceH;
+}
+
+static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
+                             int srcStride[], int srcSliceY, int srcSliceH,
+                             uint8_t *dst[], int dstStride[])
+{
+    copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
+              dst[0], dstStride[0]);
+
+    planar2x(src[1], dst[1] + dstStride[1] * (srcSliceY >> 1), c->chrSrcW,
+             srcSliceH >> 2, srcStride[1], dstStride[1]);
+    planar2x(src[2], dst[2] + dstStride[2] * (srcSliceY >> 1), c->chrSrcW,
+             srcSliceH >> 2, srcStride[2], dstStride[2]);
+    if (dst[3])
+        fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
+    return srcSliceH;
+}
+
+/* unscaled copy like stuff (assumes nearly identical formats) */
+static int packedCopyWrapper(SwsContext *c, const uint8_t *src[],
+                             int srcStride[], int srcSliceY, int srcSliceH,
+                             uint8_t *dst[], int dstStride[])
+{
+    if (dstStride[0] == srcStride[0] && srcStride[0] > 0)
+        memcpy(dst[0] + dstStride[0] * srcSliceY, src[0], srcSliceH * dstStride[0]);
+    else {
+        int i;
+        const uint8_t *srcPtr = src[0];
+        uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
+        int length = 0;
+
+        /* universal length finder */
+        while (length + c->srcW <= FFABS(dstStride[0]) &&
+               length + c->srcW <= FFABS(srcStride[0]))
+            length += c->srcW;
+        av_assert1(length != 0);
+
+        for (i = 0; i < srcSliceH; i++) {
+            memcpy(dstPtr, srcPtr, length);
+            srcPtr += srcStride[0];
+            dstPtr += dstStride[0];
+        }
+    }
+    return srcSliceH;
+}
+
+#define DITHER_COPY(dst, dstStride, src, srcStride, bswap, dbswap)\
+    uint16_t scale= dither_scale[dst_depth-1][src_depth-1];\
+    int shift= src_depth-dst_depth + dither_scale[src_depth-2][dst_depth-1];\
+    for (i = 0; i < height; i++) {\
+        const uint8_t *dither= dithers[src_depth-9][i&7];\
+        for (j = 0; j < length-7; j+=8){\
+            dst[j+0] = dbswap((bswap(src[j+0]) + dither[0])*scale>>shift);\
+            dst[j+1] = dbswap((bswap(src[j+1]) + dither[1])*scale>>shift);\
+            dst[j+2] = dbswap((bswap(src[j+2]) + dither[2])*scale>>shift);\
+            dst[j+3] = dbswap((bswap(src[j+3]) + dither[3])*scale>>shift);\
+            dst[j+4] = dbswap((bswap(src[j+4]) + dither[4])*scale>>shift);\
+            dst[j+5] = dbswap((bswap(src[j+5]) + dither[5])*scale>>shift);\
+            dst[j+6] = dbswap((bswap(src[j+6]) + dither[6])*scale>>shift);\
+            dst[j+7] = dbswap((bswap(src[j+7]) + dither[7])*scale>>shift);\
+        }\
+        for (; j < length; j++)\
+            dst[j] = dbswap((bswap(src[j]) + dither[j&7])*scale>>shift);\
+        dst += dstStride;\
+        src += srcStride;\
+    }
+
+static int planarCopyWrapper(SwsContext *c, const uint8_t *src[],
+                             int srcStride[], int srcSliceY, int srcSliceH,
+                             uint8_t *dst[], int dstStride[])
+{
+    const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);
+    const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);
+    int plane, i, j;
+    for (plane = 0; plane < 4; plane++) {
+        int length = (plane == 0 || plane == 3) ? c->srcW  : -((-c->srcW  ) >> c->chrDstHSubSample);
+        int y =      (plane == 0 || plane == 3) ? srcSliceY: -((-srcSliceY) >> c->chrDstVSubSample);
+        int height = (plane == 0 || plane == 3) ? srcSliceH: -((-srcSliceH) >> c->chrDstVSubSample);
+        const uint8_t *srcPtr = src[plane];
+        uint8_t *dstPtr = dst[plane] + dstStride[plane] * y;
+        int shiftonly= plane==1 || plane==2 || (!c->srcRange && plane==0);
+
+        if (!dst[plane])
+            continue;
+        // ignore palette for GRAY8
+        if (plane == 1 && !dst[2]) continue;
+        if (!src[plane] || (plane == 1 && !src[2])) {
+            if (is16BPS(c->dstFormat) || isNBPS(c->dstFormat)) {
+                fillPlane16(dst[plane], dstStride[plane], length, height, y,
+                        plane == 3, desc_dst->comp[plane].depth_minus1,
+                        isBE(c->dstFormat));
+            } else {
+                fillPlane(dst[plane], dstStride[plane], length, height, y,
+                        (plane == 3) ? 255 : 128);
+            }
+        } else {
+            if(isNBPS(c->srcFormat) || isNBPS(c->dstFormat)
+               || (is16BPS(c->srcFormat) != is16BPS(c->dstFormat))
+            ) {
+                const int src_depth = desc_src->comp[plane].depth_minus1 + 1;
+                const int dst_depth = desc_dst->comp[plane].depth_minus1 + 1;
+                const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
+                uint16_t *dstPtr2 = (uint16_t*)dstPtr;
+
+                if (dst_depth == 8) {
+                    if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
+                        DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, , )
+                    } else {
+                        DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, av_bswap16, )
+                    }
+                } else if (src_depth == 8) {
+                    for (i = 0; i < height; i++) {
+                        #define COPY816(w)\
+                        if(shiftonly){\
+                            for (j = 0; j < length; j++)\
+                                w(&dstPtr2[j], srcPtr[j]<<(dst_depth-8));\
+                        }else{\
+                            for (j = 0; j < length; j++)\
+                                w(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |\
+                                               (srcPtr[j]>>(2*8-dst_depth)));\
+                        }
+                        if(isBE(c->dstFormat)){
+                            COPY816(AV_WB16)
+                        } else {
+                            COPY816(AV_WL16)
+                        }
+                        dstPtr2 += dstStride[plane]/2;
+                        srcPtr  += srcStride[plane];
+                    }
+                } else if (src_depth <= dst_depth) {
+                    int orig_length = length;
+                    for (i = 0; i < height; i++) {
+                        if(isBE(c->srcFormat) == HAVE_BIGENDIAN &&
+                           isBE(c->dstFormat) == HAVE_BIGENDIAN &&
+                           shiftonly) {
+                             unsigned shift = dst_depth - src_depth;
+                             length = orig_length;
+#if HAVE_FAST_64BIT
+#define FAST_COPY_UP(shift) \
+    for (j = 0; j < length - 3; j += 4) { \
+        uint64_t v = AV_RN64A(srcPtr2 + j); \
+        AV_WN64A(dstPtr2 + j, v << shift); \
+    } \
+    length &= 3;
+#else
+#define FAST_COPY_UP(shift) \
+    for (j = 0; j < length - 1; j += 2) { \
+        uint32_t v = AV_RN32A(srcPtr2 + j); \
+        AV_WN32A(dstPtr2 + j, v << shift); \
+    } \
+    length &= 1;
+#endif
+                             switch (shift)
+                             {
+                             case 6: FAST_COPY_UP(6); break;
+                             case 7: FAST_COPY_UP(7); break;
+                             }
+                        }
+#define COPY_UP(r,w) \
+    if(shiftonly){\
+        for (j = 0; j < length; j++){ \
+            unsigned int v= r(&srcPtr2[j]);\
+            w(&dstPtr2[j], v<<(dst_depth-src_depth));\
+        }\
+    }else{\
+        for (j = 0; j < length; j++){ \
+            unsigned int v= r(&srcPtr2[j]);\
+            w(&dstPtr2[j], (v<<(dst_depth-src_depth)) | \
+                        (v>>(2*src_depth-dst_depth)));\
+        }\
+    }
+                        if(isBE(c->srcFormat)){
+                            if(isBE(c->dstFormat)){
+                                COPY_UP(AV_RB16, AV_WB16)
+                            } else {
+                                COPY_UP(AV_RB16, AV_WL16)
+                            }
+                        } else {
+                            if(isBE(c->dstFormat)){
+                                COPY_UP(AV_RL16, AV_WB16)
+                            } else {
+                                COPY_UP(AV_RL16, AV_WL16)
+                            }
+                        }
+                        dstPtr2 += dstStride[plane]/2;
+                        srcPtr2 += srcStride[plane]/2;
+                    }
+                } else {
+                    if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
+                        if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
+                            DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , )
+                        } else {
+                            DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , av_bswap16)
+                        }
+                    }else{
+                        if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
+                            DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, )
+                        } else {
+                            DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, av_bswap16)
+                        }
+                    }
+                }
+            } else if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat) &&
+                      isBE(c->srcFormat) != isBE(c->dstFormat)) {
+
+                for (i = 0; i < height; i++) {
+                    for (j = 0; j < length; j++)
+                        ((uint16_t *) dstPtr)[j] = av_bswap16(((const uint16_t *) srcPtr)[j]);
+                    srcPtr += srcStride[plane];
+                    dstPtr += dstStride[plane];
+                }
+            } else if (dstStride[plane] == srcStride[plane] &&
+                       srcStride[plane] > 0 && srcStride[plane] == length) {
+                memcpy(dst[plane] + dstStride[plane] * y, src[plane],
+                       height * dstStride[plane]);
+            } else {
+                if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat))
+                    length *= 2;
+                else if (!desc_src->comp[0].depth_minus1)
+                    length >>= 3; // monowhite/black
+                for (i = 0; i < height; i++) {
+                    memcpy(dstPtr, srcPtr, length);
+                    srcPtr += srcStride[plane];
+                    dstPtr += dstStride[plane];
+                }
+            }
+        }
+    }
+    return srcSliceH;
+}
+
+
+#define IS_DIFFERENT_ENDIANESS(src_fmt, dst_fmt, pix_fmt)          \
+    ((src_fmt == pix_fmt ## BE && dst_fmt == pix_fmt ## LE) ||     \
+     (src_fmt == pix_fmt ## LE && dst_fmt == pix_fmt ## BE))
+
+
+void ff_get_unscaled_swscale(SwsContext *c)
+{
+    const enum AVPixelFormat srcFormat = c->srcFormat;
+    const enum AVPixelFormat dstFormat = c->dstFormat;
+    const int flags = c->flags;
+    const int dstH = c->dstH;
+    int needsDither;
+
+    needsDither = isAnyRGB(dstFormat) &&
+            c->dstFormatBpp < 24 &&
+           (c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));
+
+    /* yv12_to_nv12 */
+    if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) &&
+        (dstFormat == AV_PIX_FMT_NV12 || dstFormat == AV_PIX_FMT_NV21)) {
+        c->swScale = planarToNv12Wrapper;
+    }
+    /* yuv2bgr */
+    if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUV422P ||
+         srcFormat == AV_PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&
+        !(flags & (SWS_ACCURATE_RND|SWS_ERROR_DIFFUSION)) && !(dstH & 1)) {
+        c->swScale = ff_yuv2rgb_get_func_ptr(c);
+    }
+
+    if (srcFormat == AV_PIX_FMT_YUV410P &&
+        (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
+        !(flags & SWS_BITEXACT)) {
+        c->swScale = yvu9ToYv12Wrapper;
+    }
+
+    /* bgr24toYV12 */
+    if (srcFormat == AV_PIX_FMT_BGR24 &&
+        (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
+        !(flags & SWS_ACCURATE_RND))
+        c->swScale = bgr24ToYv12Wrapper;
+
+    /* RGB/BGR -> RGB/BGR (no dither needed forms) */
+    if (isAnyRGB(srcFormat) && isAnyRGB(dstFormat) && findRgbConvFn(c)
+        && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
+        c->swScale= rgbToRgbWrapper;
+
+#define isByteRGB(f) (             \
+        f == AV_PIX_FMT_RGB32   || \
+        f == AV_PIX_FMT_RGB32_1 || \
+        f == AV_PIX_FMT_RGB24   || \
+        f == AV_PIX_FMT_BGR32   || \
+        f == AV_PIX_FMT_BGR32_1 || \
+        f == AV_PIX_FMT_BGR24)
+
+    if (srcFormat == AV_PIX_FMT_GBRP && isPlanar(srcFormat) && isByteRGB(dstFormat))
+        c->swScale = planarRgbToRgbWrapper;
+
+    if (av_pix_fmt_desc_get(srcFormat)->comp[0].depth_minus1 == 7 &&
+        isPackedRGB(srcFormat) && dstFormat == AV_PIX_FMT_GBRP)
+        c->swScale = rgbToPlanarRgbWrapper;
+
+    /* bswap 16 bits per pixel/component packed formats */
+    if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR444) ||
+        IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR48)  ||
+        IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGRA64) ||
+        IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR555) ||
+        IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR565) ||
+        IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GRAY16) ||
+        IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB444) ||
+        IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB48)  ||
+        IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGBA64) ||
+        IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB555) ||
+        IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB565))
+        c->swScale = packed_16bpc_bswap;
+
+    if (usePal(srcFormat) && isByteRGB(dstFormat))
+        c->swScale = palToRgbWrapper;
+
+    if (srcFormat == AV_PIX_FMT_YUV422P) {
+        if (dstFormat == AV_PIX_FMT_YUYV422)
+            c->swScale = yuv422pToYuy2Wrapper;
+        else if (dstFormat == AV_PIX_FMT_UYVY422)
+            c->swScale = yuv422pToUyvyWrapper;
+    }
+
+    /* LQ converters if -sws 0 or -sws 4*/
+    if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {
+        /* yv12_to_yuy2 */
+        if (srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) {
+            if (dstFormat == AV_PIX_FMT_YUYV422)
+                c->swScale = planarToYuy2Wrapper;
+            else if (dstFormat == AV_PIX_FMT_UYVY422)
+                c->swScale = planarToUyvyWrapper;
+        }
+    }
+    if (srcFormat == AV_PIX_FMT_YUYV422 &&
+       (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
+        c->swScale = yuyvToYuv420Wrapper;
+    if (srcFormat == AV_PIX_FMT_UYVY422 &&
+       (dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
+        c->swScale = uyvyToYuv420Wrapper;
+    if (srcFormat == AV_PIX_FMT_YUYV422 && dstFormat == AV_PIX_FMT_YUV422P)
+        c->swScale = yuyvToYuv422Wrapper;
+    if (srcFormat == AV_PIX_FMT_UYVY422 && dstFormat == AV_PIX_FMT_YUV422P)
+        c->swScale = uyvyToYuv422Wrapper;
+
+#define isPlanarGray(x) (isGray(x) && (x) != AV_PIX_FMT_GRAY8A)
+    /* simple copy */
+    if ( srcFormat == dstFormat ||
+        (srcFormat == AV_PIX_FMT_YUVA420P && dstFormat == AV_PIX_FMT_YUV420P) ||
+        (srcFormat == AV_PIX_FMT_YUV420P && dstFormat == AV_PIX_FMT_YUVA420P) ||
+        (isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||
+        (isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||
+        (isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||
+        (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&
+         c->chrDstHSubSample == c->chrSrcHSubSample &&
+         c->chrDstVSubSample == c->chrSrcVSubSample &&
+         dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&
+         srcFormat != AV_PIX_FMT_NV12 && srcFormat != AV_PIX_FMT_NV21))
+    {
+        if (isPacked(c->srcFormat))
+            c->swScale = packedCopyWrapper;
+        else /* Planar YUV or gray */
+            c->swScale = planarCopyWrapper;
+    }
+
+    if (ARCH_BFIN)
+        ff_bfin_get_unscaled_swscale(c);
+    if (HAVE_ALTIVEC)
+        ff_swscale_get_unscaled_altivec(c);
+}
+
+/* Convert the palette to the same packed 32-bit format as the palette */
+void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,
+                                   int num_pixels, const uint8_t *palette)
+{
+    int i;
+
+    for (i = 0; i < num_pixels; i++)
+        ((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];
+}
+
+/* Palette format: ABCD -> dst format: ABC */
+void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,
+                                   int num_pixels, const uint8_t *palette)
+{
+    int i;
+
+    for (i = 0; i < num_pixels; i++) {
+        //FIXME slow?
+        dst[0] = palette[src[i] * 4 + 0];
+        dst[1] = palette[src[i] * 4 + 1];
+        dst[2] = palette[src[i] * 4 + 2];
+        dst += 3;
+    }
+}