almost exhaustive image conversion support

Originally committed as revision 1802 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 824 insertions, 0 deletions

diff --git a/libavcodec/imgconvert_template.h b/libavcodec/imgconvert_template.h
new file mode 100644
index 0000000000..b2573b2623
--- /dev/null
+++ b/libavcodec/imgconvert_template.h
@@ -0,0 +1,824 @@
+/*
+ * Templates for image convertion routines
+ * Copyright (c) 2001, 2002, 2003 Fabrice Bellard.
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef RGB_OUT
+#define RGB_OUT(d, r, g, b) RGBA_OUT(d, r, g, b, 0xff)
+#endif
+
+static void glue(yuv420p_to_, RGB_NAME)(AVPicture *dst, AVPicture *src,
+                                        int width, int height)
+{
+    uint8_t *y1_ptr, *y2_ptr, *cb_ptr, *cr_ptr, *d, *d1, *d2;
+    int w, y, cb, cr, r_add, g_add, b_add, width2;
+    uint8_t *cm = cropTbl + MAX_NEG_CROP;
+    unsigned int r, g, b;
+
+    d = dst->data[0];
+    y1_ptr = src->data[0];
+    cb_ptr = src->data[1];
+    cr_ptr = src->data[2];
+    width2 = (width + 1) >> 1;
+    for(;height >= 2; height -= 2) {
+        d1 = d;
+        d2 = d + dst->linesize[0];
+        y2_ptr = y1_ptr + src->linesize[0];
+        for(w = width; w >= 2; w -= 2) {
+            YUV_TO_RGB1_CCIR(cb_ptr[0], cr_ptr[0]);
+            /* output 4 pixels */
+            YUV_TO_RGB2_CCIR(r, g, b, y1_ptr[0]);
+            RGB_OUT(d1, r, g, b);
+
+            YUV_TO_RGB2_CCIR(r, g, b, y1_ptr[1]);
+            RGB_OUT(d1 + BPP, r, g, b);
+
+            YUV_TO_RGB2_CCIR(r, g, b, y2_ptr[0]);
+            RGB_OUT(d2, r, g, b);
+
+            YUV_TO_RGB2_CCIR(r, g, b, y2_ptr[1]);
+            RGB_OUT(d2 + BPP, r, g, b);
+
+            d1 += 2 * BPP;
+            d2 += 2 * BPP;
+
+            y1_ptr += 2;
+            y2_ptr += 2;
+            cb_ptr++;
+            cr_ptr++;
+        }
+        /* handle odd width */
+        if (w) {
+            YUV_TO_RGB1_CCIR(cb_ptr[0], cr_ptr[0]);
+            YUV_TO_RGB2_CCIR(r, g, b, y1_ptr[0]);
+            RGB_OUT(d1, r, g, b);
+
+            YUV_TO_RGB2_CCIR(r, g, b, y2_ptr[0]);
+            RGB_OUT(d2, r, g, b);
+            d1 += BPP;
+            d2 += BPP;
+            y1_ptr++;
+            y2_ptr++;
+            cb_ptr++;
+            cr_ptr++;
+        }
+        d += 2 * dst->linesize[0];
+        y1_ptr += 2 * src->linesize[0] - width;
+        cb_ptr += src->linesize[1] - width2;
+        cr_ptr += src->linesize[2] - width2;
+    }
+    /* handle odd height */
+    if (height) {
+        d1 = d;
+        for(w = width; w >= 2; w -= 2) {
+            YUV_TO_RGB1_CCIR(cb_ptr[0], cr_ptr[0]);
+            /* output 2 pixels */
+            YUV_TO_RGB2_CCIR(r, g, b, y1_ptr[0]);
+            RGB_OUT(d1, r, g, b);
+
+            YUV_TO_RGB2_CCIR(r, g, b, y1_ptr[1]);
+            RGB_OUT(d1 + BPP, r, g, b);
+
+            d1 += 2 * BPP;
+
+            y1_ptr += 2;
+            cb_ptr++;
+            cr_ptr++;
+        }
+        /* handle width */
+        if (w) {
+            YUV_TO_RGB1_CCIR(cb_ptr[0], cr_ptr[0]);
+            /* output 2 pixels */
+            YUV_TO_RGB2_CCIR(r, g, b, y1_ptr[0]);
+            RGB_OUT(d1, r, g, b);
+            d1 += BPP;
+
+            y1_ptr++;
+            cb_ptr++;
+            cr_ptr++;
+        }
+    }
+}
+
+static void glue(yuvj420p_to_, RGB_NAME)(AVPicture *dst, AVPicture *src,
+                                         int width, int height)
+{
+    uint8_t *y1_ptr, *y2_ptr, *cb_ptr, *cr_ptr, *d, *d1, *d2;
+    int w, y, cb, cr, r_add, g_add, b_add, width2;
+    uint8_t *cm = cropTbl + MAX_NEG_CROP;
+    unsigned int r, g, b;
+
+    d = dst->data[0];
+    y1_ptr = src->data[0];
+    cb_ptr = src->data[1];
+    cr_ptr = src->data[2];
+    width2 = (width + 1) >> 1;
+    for(;height >= 2; height -= 2) {
+        d1 = d;
+        d2 = d + dst->linesize[0];
+        y2_ptr = y1_ptr + src->linesize[0];
+        for(w = width; w >= 2; w -= 2) {
+            YUV_TO_RGB1(cb_ptr[0], cr_ptr[0]);
+            /* output 4 pixels */
+            YUV_TO_RGB2(r, g, b, y1_ptr[0]);
+            RGB_OUT(d1, r, g, b);
+
+            YUV_TO_RGB2(r, g, b, y1_ptr[1]);
+            RGB_OUT(d1 + BPP, r, g, b);
+
+            YUV_TO_RGB2(r, g, b, y2_ptr[0]);
+            RGB_OUT(d2, r, g, b);
+
+            YUV_TO_RGB2(r, g, b, y2_ptr[1]);
+            RGB_OUT(d2 + BPP, r, g, b);
+
+            d1 += 2 * BPP;
+            d2 += 2 * BPP;
+
+            y1_ptr += 2;
+            y2_ptr += 2;
+            cb_ptr++;
+            cr_ptr++;
+        }
+        /* handle odd width */
+        if (w) {
+            YUV_TO_RGB1(cb_ptr[0], cr_ptr[0]);
+            YUV_TO_RGB2(r, g, b, y1_ptr[0]);
+            RGB_OUT(d1, r, g, b);
+
+            YUV_TO_RGB2(r, g, b, y2_ptr[0]);
+            RGB_OUT(d2, r, g, b);
+            d1 += BPP;
+            d2 += BPP;
+            y1_ptr++;
+            y2_ptr++;
+            cb_ptr++;
+            cr_ptr++;
+        }
+        d += 2 * dst->linesize[0];
+        y1_ptr += 2 * src->linesize[0] - width;
+        cb_ptr += src->linesize[1] - width2;
+        cr_ptr += src->linesize[2] - width2;
+    }
+    /* handle odd height */
+    if (height) {
+        d1 = d;
+        for(w = width; w >= 2; w -= 2) {
+            YUV_TO_RGB1(cb_ptr[0], cr_ptr[0]);
+            /* output 2 pixels */
+            YUV_TO_RGB2(r, g, b, y1_ptr[0]);
+            RGB_OUT(d1, r, g, b);
+
+            YUV_TO_RGB2(r, g, b, y1_ptr[1]);
+            RGB_OUT(d1 + BPP, r, g, b);
+
+            d1 += 2 * BPP;
+
+            y1_ptr += 2;
+            cb_ptr++;
+            cr_ptr++;
+        }
+        /* handle width */
+        if (w) {
+            YUV_TO_RGB1(cb_ptr[0], cr_ptr[0]);
+            /* output 2 pixels */
+            YUV_TO_RGB2(r, g, b, y1_ptr[0]);
+            RGB_OUT(d1, r, g, b);
+            d1 += BPP;
+
+            y1_ptr++;
+            cb_ptr++;
+            cr_ptr++;
+        }
+    }
+}
+
+static void glue(RGB_NAME, _to_yuv420p)(AVPicture *dst, AVPicture *src,
+                                        int width, int height)
+{
+    int wrap, wrap3, width2;
+    int r, g, b, r1, g1, b1, w;
+    uint8_t *lum, *cb, *cr;
+    const uint8_t *p;
+
+    lum = dst->data[0];
+    cb = dst->data[1];
+    cr = dst->data[2];
+
+    width2 = (width + 1) >> 1;
+    wrap = dst->linesize[0];
+    wrap3 = src->linesize[0];
+    p = src->data[0];
+    for(;height>=2;height -= 2) {
+        for(w = width; w >= 2; w -= 2) {
+            RGB_IN(r, g, b, p);
+            r1 = r;
+            g1 = g;
+            b1 = b;
+            lum[0] = RGB_TO_Y_CCIR(r, g, b);
+
+            RGB_IN(r, g, b, p + BPP);
+            r1 += r;
+            g1 += g;
+            b1 += b;
+            lum[1] = RGB_TO_Y_CCIR(r, g, b);
+            p += wrap3;
+            lum += wrap;
+
+            RGB_IN(r, g, b, p);
+            r1 += r;
+            g1 += g;
+            b1 += b;
+            lum[0] = RGB_TO_Y_CCIR(r, g, b);
+
+            RGB_IN(r, g, b, p + BPP);
+            r1 += r;
+            g1 += g;
+            b1 += b;
+            lum[1] = RGB_TO_Y_CCIR(r, g, b);
+
+            cb[0] = RGB_TO_U_CCIR(r1, g1, b1, 2);
+            cr[0] = RGB_TO_V_CCIR(r1, g1, b1, 2);
+
+            cb++;
+            cr++;
+            p += -wrap3 + 2 * BPP;
+            lum += -wrap + 2;
+        }
+        if (w) {
+            RGB_IN(r, g, b, p);
+            r1 = r;
+            g1 = g;
+            b1 = b;
+            lum[0] = RGB_TO_Y_CCIR(r, g, b);
+            p += wrap3;
+            lum += wrap;
+            RGB_IN(r, g, b, p);
+            r1 += r;
+            g1 += g;
+            b1 += b;
+            lum[0] = RGB_TO_Y_CCIR(r, g, b);
+            cb[0] = RGB_TO_U_CCIR(r1, g1, b1, 1);
+            cr[0] = RGB_TO_V_CCIR(r1, g1, b1, 1);
+            cb++;
+            cr++;
+            p += -wrap3 + BPP;
+            lum += -wrap + 1;
+        }
+        p += wrap3 + (wrap3 - width * BPP);
+        lum += wrap + (wrap - width);
+        cb += dst->linesize[1] - width2;
+        cr += dst->linesize[2] - width2;
+    }
+    /* handle odd height */
+    if (height) {
+        for(w = width; w >= 2; w -= 2) {
+            RGB_IN(r, g, b, p);
+            r1 = r;
+            g1 = g;
+            b1 = b;
+            lum[0] = RGB_TO_Y_CCIR(r, g, b);
+
+            RGB_IN(r, g, b, p + BPP);
+            r1 += r;
+            g1 += g;
+            b1 += b;
+            lum[1] = RGB_TO_Y_CCIR(r, g, b);
+            cb[0] = RGB_TO_U_CCIR(r1, g1, b1, 1);
+            cr[0] = RGB_TO_V_CCIR(r1, g1, b1, 1);
+            cb++;
+            cr++;
+            p += 2 * BPP;
+           lum += 2;
+        }
+        if (w) {
+            RGB_IN(r, g, b, p);
+            lum[0] = RGB_TO_Y_CCIR(r, g, b);
+            cb[0] = RGB_TO_U_CCIR(r, g, b, 0);
+            cr[0] = RGB_TO_V_CCIR(r, g, b, 0);
+        }
+    }
+}
+
+static void glue(RGB_NAME, _to_gray)(AVPicture *dst, AVPicture *src,
+                                     int width, int height)
+{
+    const unsigned char *p;
+    unsigned char *q;
+    int r, g, b, dst_wrap, src_wrap;
+    int x, y;
+
+    p = src->data[0];
+    src_wrap = src->linesize[0] - BPP * width;
+
+    q = dst->data[0];
+    dst_wrap = dst->linesize[0] - width;
+
+    for(y=0;y<height;y++) {
+        for(x=0;x<width;x++) {
+            RGB_IN(r, g, b, p);
+            q[0] = RGB_TO_Y(r, g, b);
+            q++;
+            p += BPP;
+        }
+        p += src_wrap;
+        q += dst_wrap;
+    }
+}
+
+static void glue(gray_to_, RGB_NAME)(AVPicture *dst, AVPicture *src,
+                                     int width, int height)
+{
+    const unsigned char *p;
+    unsigned char *q;
+    int r, dst_wrap, src_wrap;
+    int x, y;
+
+    p = src->data[0];
+    src_wrap = src->linesize[0] - width;
+
+    q = dst->data[0];
+    dst_wrap = dst->linesize[0] - BPP * width;
+
+    for(y=0;y<height;y++) {
+        for(x=0;x<width;x++) {
+            r = p[0];
+            RGB_OUT(q, r, r, r);
+            q += BPP;
+            p ++;
+        }
+        p += src_wrap;
+        q += dst_wrap;
+    }
+}
+
+static void glue(pal8_to_, RGB_NAME)(AVPicture *dst, AVPicture *src,
+                                     int width, int height)
+{
+    const unsigned char *p;
+    unsigned char *q;
+    int r, g, b, dst_wrap, src_wrap;
+    int x, y;
+    uint32_t v;
+    const uint32_t *palette;
+
+    p = src->data[0];
+    src_wrap = src->linesize[0] - width;
+    palette = (uint32_t *)src->data[1];
+
+    q = dst->data[0];
+    dst_wrap = dst->linesize[0] - BPP * width;
+
+    for(y=0;y<height;y++) {
+        for(x=0;x<width;x++) {
+            v = palette[p[0]];
+            r = (v >> 16) & 0xff;
+            g = (v >> 8) & 0xff;
+            b = (v) & 0xff;
+#ifdef RGBA_OUT
+            {
+                int a;
+                a = (v >> 24) & 0xff;
+                RGBA_OUT(q, r, g, b, a);
+            }
+#else
+            RGB_OUT(q, r, g, b);
+#endif
+            q += BPP;
+            p ++;
+        }
+        p += src_wrap;
+        q += dst_wrap;
+    }
+}
+
+#if !defined(FMT_RGBA32) && defined(RGBA_OUT)
+/* alpha support */
+
+static void glue(rgba32_to_, RGB_NAME)(AVPicture *dst, AVPicture *src,
+                                      int width, int height)
+{
+    const uint8_t *s;
+    uint8_t *d;
+    int src_wrap, dst_wrap, j, y;
+    unsigned int v, r, g, b, a;
+
+    s = src->data[0];
+    src_wrap = src->linesize[0] - width * 4;
+
+    d = dst->data[0];
+    dst_wrap = dst->linesize[0] - width * BPP;
+
+    for(y=0;y<height;y++) {
+        for(j = 0;j < width; j++) {
+            v = ((const uint32_t *)(s))[0];
+            a = (v >> 24) & 0xff;
+            r = (v >> 16) & 0xff;
+            g = (v >> 8) & 0xff;
+            b = v & 0xff;
+            RGBA_OUT(d, r, g, b, a);
+            s += 4;
+            d += BPP;
+        }
+        s += src_wrap;
+        d += dst_wrap;
+    }
+}
+
+static void glue(RGB_NAME, _to_rgba32)(AVPicture *dst, AVPicture *src,
+                                       int width, int height)
+{
+    const uint8_t *s;
+    uint8_t *d;
+    int src_wrap, dst_wrap, j, y;
+    unsigned int r, g, b, a;
+
+    s = src->data[0];
+    src_wrap = src->linesize[0] - width * BPP;
+
+    d = dst->data[0];
+    dst_wrap = dst->linesize[0] - width * 4;
+
+    for(y=0;y<height;y++) {
+        for(j = 0;j < width; j++) {
+            RGBA_IN(r, g, b, a, s);
+            ((uint32_t *)(d))[0] = (a << 24) | (r << 16) | (g << 8) | b;
+            d += 4;
+            s += BPP;
+        }
+        s += src_wrap;
+        d += dst_wrap;
+    }
+}
+
+#endif /* !defined(FMT_RGBA32) && defined(RGBA_IN) */
+
+#ifndef FMT_RGB24
+
+static void glue(rgb24_to_, RGB_NAME)(AVPicture *dst, AVPicture *src,
+                                      int width, int height)
+{
+    const uint8_t *s;
+    uint8_t *d;
+    int src_wrap, dst_wrap, j, y;
+    unsigned int r, g, b;
+
+    s = src->data[0];
+    src_wrap = src->linesize[0] - width * 3;
+
+    d = dst->data[0];
+    dst_wrap = dst->linesize[0] - width * BPP;
+
+    for(y=0;y<height;y++) {
+        for(j = 0;j < width; j++) {
+            r = s[0];
+            g = s[1];
+            b = s[2];
+            RGB_OUT(d, r, g, b);
+            s += 3;
+            d += BPP;
+        }
+        s += src_wrap;
+        d += dst_wrap;
+    }
+}
+
+static void glue(RGB_NAME, _to_rgb24)(AVPicture *dst, AVPicture *src,
+                                      int width, int height)
+{
+    const uint8_t *s;
+    uint8_t *d;
+    int src_wrap, dst_wrap, j, y;
+    unsigned int r, g , b;
+
+    s = src->data[0];
+    src_wrap = src->linesize[0] - width * BPP;
+
+    d = dst->data[0];
+    dst_wrap = dst->linesize[0] - width * 3;
+
+    for(y=0;y<height;y++) {
+        for(j = 0;j < width; j++) {
+            RGB_IN(r, g, b, s)
+            d[0] = r;
+            d[1] = g;
+            d[2] = b;
+            d += 3;
+            s += BPP;
+        }
+        s += src_wrap;
+        d += dst_wrap;
+    }
+}
+
+#endif /* !FMT_RGB24 */
+
+#ifdef FMT_RGB24
+
+static void yuv444p_to_rgb24(AVPicture *dst, AVPicture *src,
+                             int width, int height)
+{
+    uint8_t *y1_ptr, *cb_ptr, *cr_ptr, *d, *d1;
+    int w, y, cb, cr, r_add, g_add, b_add;
+    uint8_t *cm = cropTbl + MAX_NEG_CROP;
+    unsigned int r, g, b;
+
+    d = dst->data[0];
+    y1_ptr = src->data[0];
+    cb_ptr = src->data[1];
+    cr_ptr = src->data[2];
+    for(;height > 0; height --) {
+        d1 = d;
+        for(w = width; w > 0; w--) {
+            YUV_TO_RGB1_CCIR(cb_ptr[0], cr_ptr[0]);
+
+            YUV_TO_RGB2_CCIR(r, g, b, y1_ptr[0]);
+            RGB_OUT(d1, r, g, b);
+            d1 += BPP;
+
+            y1_ptr++;
+            cb_ptr++;
+            cr_ptr++;
+        }
+        d += dst->linesize[0];
+        y1_ptr += src->linesize[0] - width;
+        cb_ptr += src->linesize[1] - width;
+        cr_ptr += src->linesize[2] - width;
+    }
+}
+
+static void yuvj444p_to_rgb24(AVPicture *dst, AVPicture *src,
+                              int width, int height)
+{
+    uint8_t *y1_ptr, *cb_ptr, *cr_ptr, *d, *d1;
+    int w, y, cb, cr, r_add, g_add, b_add;
+    uint8_t *cm = cropTbl + MAX_NEG_CROP;
+    unsigned int r, g, b;
+
+    d = dst->data[0];
+    y1_ptr = src->data[0];
+    cb_ptr = src->data[1];
+    cr_ptr = src->data[2];
+    for(;height > 0; height --) {
+        d1 = d;
+        for(w = width; w > 0; w--) {
+            YUV_TO_RGB1(cb_ptr[0], cr_ptr[0]);
+
+            YUV_TO_RGB2(r, g, b, y1_ptr[0]);
+            RGB_OUT(d1, r, g, b);
+            d1 += BPP;
+
+            y1_ptr++;
+            cb_ptr++;
+            cr_ptr++;
+        }
+        d += dst->linesize[0];
+        y1_ptr += src->linesize[0] - width;
+        cb_ptr += src->linesize[1] - width;
+        cr_ptr += src->linesize[2] - width;
+    }
+}
+
+static void rgb24_to_yuv444p(AVPicture *dst, AVPicture *src,
+                             int width, int height)
+{
+    int src_wrap, x, y;
+    int r, g, b;
+    uint8_t *lum, *cb, *cr;
+    const uint8_t *p;
+
+    lum = dst->data[0];
+    cb = dst->data[1];
+    cr = dst->data[2];
+
+    src_wrap = src->linesize[0] - width * BPP;
+    p = src->data[0];
+    for(y=0;y<height;y++) {
+        for(x=0;x<width;x++) {
+            RGB_IN(r, g, b, p);
+            lum[0] = RGB_TO_Y_CCIR(r, g, b);
+            cb[0] = RGB_TO_U_CCIR(r, g, b, 0);
+            cr[0] = RGB_TO_V_CCIR(r, g, b, 0);
+            p += BPP;
+            cb++;
+            cr++;
+            lum++;
+        }
+        p += src_wrap;
+        lum += dst->linesize[0] - width;
+        cb += dst->linesize[1] - width;
+        cr += dst->linesize[2] - width;
+    }
+}
+
+static void rgb24_to_yuvj420p(AVPicture *dst, AVPicture *src,
+                              int width, int height)
+{
+    int wrap, wrap3, width2;
+    int r, g, b, r1, g1, b1, w;
+    uint8_t *lum, *cb, *cr;
+    const uint8_t *p;
+
+    lum = dst->data[0];
+    cb = dst->data[1];
+    cr = dst->data[2];
+
+    width2 = (width + 1) >> 1;
+    wrap = dst->linesize[0];
+    wrap3 = src->linesize[0];
+    p = src->data[0];
+    for(;height>=2;height -= 2) {
+        for(w = width; w >= 2; w -= 2) {
+            RGB_IN(r, g, b, p);
+            r1 = r;
+            g1 = g;
+            b1 = b;
+            lum[0] = RGB_TO_Y(r, g, b);
+
+            RGB_IN(r, g, b, p + BPP);
+            r1 += r;
+            g1 += g;
+            b1 += b;
+            lum[1] = RGB_TO_Y(r, g, b);
+            p += wrap3;
+            lum += wrap;
+
+            RGB_IN(r, g, b, p);
+            r1 += r;
+            g1 += g;
+            b1 += b;
+            lum[0] = RGB_TO_Y(r, g, b);
+
+            RGB_IN(r, g, b, p + BPP);
+            r1 += r;
+            g1 += g;
+            b1 += b;
+            lum[1] = RGB_TO_Y(r, g, b);
+
+            cb[0] = RGB_TO_U(r1, g1, b1, 2);
+            cr[0] = RGB_TO_V(r1, g1, b1, 2);
+
+            cb++;
+            cr++;
+            p += -wrap3 + 2 * BPP;
+            lum += -wrap + 2;
+        }
+        if (w) {
+            RGB_IN(r, g, b, p);
+            r1 = r;
+            g1 = g;
+            b1 = b;
+            lum[0] = RGB_TO_Y(r, g, b);
+            p += wrap3;
+            lum += wrap;
+            RGB_IN(r, g, b, p);
+            r1 += r;
+            g1 += g;
+            b1 += b;
+            lum[0] = RGB_TO_Y(r, g, b);
+            cb[0] = RGB_TO_U(r1, g1, b1, 1);
+            cr[0] = RGB_TO_V(r1, g1, b1, 1);
+            cb++;
+            cr++;
+            p += -wrap3 + BPP;
+            lum += -wrap + 1;
+        }
+        p += wrap3 + (wrap3 - width * BPP);
+        lum += wrap + (wrap - width);
+        cb += dst->linesize[1] - width2;
+        cr += dst->linesize[2] - width2;
+    }
+    /* handle odd height */
+    if (height) {
+        for(w = width; w >= 2; w -= 2) {
+            RGB_IN(r, g, b, p);
+            r1 = r;
+            g1 = g;
+            b1 = b;
+            lum[0] = RGB_TO_Y(r, g, b);
+
+            RGB_IN(r, g, b, p + BPP);
+            r1 += r;
+            g1 += g;
+            b1 += b;
+            lum[1] = RGB_TO_Y(r, g, b);
+            cb[0] = RGB_TO_U(r1, g1, b1, 1);
+            cr[0] = RGB_TO_V(r1, g1, b1, 1);
+            cb++;
+            cr++;
+            p += 2 * BPP;
+           lum += 2;
+        }
+        if (w) {
+            RGB_IN(r, g, b, p);
+            lum[0] = RGB_TO_Y(r, g, b);
+            cb[0] = RGB_TO_U(r, g, b, 0);
+            cr[0] = RGB_TO_V(r, g, b, 0);
+        }
+    }
+}
+
+static void rgb24_to_yuvj444p(AVPicture *dst, AVPicture *src,
+                              int width, int height)
+{
+    int src_wrap, x, y;
+    int r, g, b;
+    uint8_t *lum, *cb, *cr;
+    const uint8_t *p;
+
+    lum = dst->data[0];
+    cb = dst->data[1];
+    cr = dst->data[2];
+
+    src_wrap = src->linesize[0] - width * BPP;
+    p = src->data[0];
+    for(y=0;y<height;y++) {
+        for(x=0;x<width;x++) {
+            RGB_IN(r, g, b, p);
+            lum[0] = RGB_TO_Y(r, g, b);
+            cb[0] = RGB_TO_U(r, g, b, 0);
+            cr[0] = RGB_TO_V(r, g, b, 0);
+            p += BPP;
+            cb++;
+            cr++;
+            lum++;
+        }
+        p += src_wrap;
+        lum += dst->linesize[0] - width;
+        cb += dst->linesize[1] - width;
+        cr += dst->linesize[2] - width;
+    }
+}
+
+#endif /* FMT_RGB24 */
+
+#if defined(FMT_RGB24) || defined(FMT_RGBA32)
+
+static void glue(RGB_NAME, _to_pal8)(AVPicture *dst, AVPicture *src,
+                                     int width, int height)
+{
+    const unsigned char *p;
+    unsigned char *q;
+    int dst_wrap, src_wrap;
+    int x, y, has_alpha;
+    unsigned int r, g, b;
+
+    p = src->data[0];
+    src_wrap = src->linesize[0] - BPP * width;
+
+    q = dst->data[0];
+    dst_wrap = dst->linesize[0] - width;
+    has_alpha = 0;
+    
+    for(y=0;y<height;y++) {
+        for(x=0;x<width;x++) {
+#ifdef RGBA_IN
+            {
+                unsigned int a;
+                RGBA_IN(r, g, b, a, p);
+                /* crude approximation for alpha ! */
+                if (a < 0x80) {
+                    has_alpha = 1;
+                    q[0] = TRANSP_INDEX;
+                } else {
+                    q[0] = gif_clut_index(r, g, b);
+                }
+            }
+#else
+            RGB_IN(r, g, b, p);
+            q[0] = gif_clut_index(r, g, b);
+#endif
+            q++;
+            p += BPP;
+        }
+        p += src_wrap;
+        q += dst_wrap;
+    }
+
+    build_rgb_palette(dst->data[1], has_alpha);
+}
+
+#endif /* defined(FMT_RGB24) || defined(FMT_RGBA32) */
+        
+#undef RGB_IN
+#undef RGBA_IN
+#undef RGB_OUT
+#undef RGBA_OUT
+#undef BPP
+#undef RGB_NAME
+#undef FMT_RGB24
+#undef FMT_RGBA32