Add support for hardcoding the motionpixels rgb to yuv table.

Originally committed as revision 20627 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 91 insertions, 0 deletions

diff --git a/libavcodec/motionpixels_tablegen.h b/libavcodec/motionpixels_tablegen.h
new file mode 100644
index 0000000000..5d6df52af1
--- /dev/null
+++ b/libavcodec/motionpixels_tablegen.h
@@ -0,0 +1,91 @@
+/*
+ * Header file for hardcoded motionpixels RGB to YUV table
+ *
+ * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
+ *
+ * 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
+ */
+
+#ifndef MOTIONPIXELS_TABLEGEN_H
+#define MOTIONPIXELS_TABLEGEN_H
+
+#include <stdint.h>
+
+typedef struct YuvPixel {
+    int8_t y, v, u;
+} YuvPixel;
+
+static int mp_yuv_to_rgb(int y, int v, int u, int clip_rgb) {
+    static const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    int r, g, b;
+
+    r = (1000 * y + 701 * v) / 1000;
+    g = (1000 * y - 357 * v - 172 * u) / 1000;
+    b = (1000 * y + 886 * u) / 1000;
+    if (clip_rgb)
+        return ((cm[r * 8] & 0xF8) << 7) | ((cm[g * 8] & 0xF8) << 2) | (cm[b * 8] >> 3);
+    if ((unsigned)r < 32 && (unsigned)g < 32 && (unsigned)b < 32)
+        return (r << 10) | (g << 5) | b;
+    return 1 << 15;
+}
+
+#if CONFIG_HARDCODED_TABLES
+#define motionpixels_tableinit()
+#include "libavcodec/motionpixels_tables.h"
+#else
+static YuvPixel mp_rgb_yuv_table[1 << 15];
+
+static void mp_set_zero_yuv(YuvPixel *p)
+{
+    int i, j;
+
+    for (i = 0; i < 31; ++i) {
+        for (j = 31; j > i; --j)
+            if (!(p[j].u | p[j].v | p[j].y))
+                p[j] = p[j - 1];
+        for (j = 0; j < 31 - i; ++j)
+            if (!(p[j].u | p[j].v | p[j].y))
+                p[j] = p[j + 1];
+    }
+}
+
+static void mp_build_rgb_yuv_table(YuvPixel *p)
+{
+    int y, v, u, i;
+
+    for (y = 0; y <= 31; ++y)
+        for (v = -31; v <= 31; ++v)
+            for (u = -31; u <= 31; ++u) {
+                i = mp_yuv_to_rgb(y, v, u, 0);
+                if (i < (1 << 15) && !(p[i].u | p[i].v | p[i].y)) {
+                    p[i].y = y;
+                    p[i].v = v;
+                    p[i].u = u;
+                }
+            }
+    for (i = 0; i < 1024; ++i)
+        mp_set_zero_yuv(p + i * 32);
+}
+
+static void motionpixels_tableinit(void)
+{
+    if (!mp_rgb_yuv_table[0].u)
+        mp_build_rgb_yuv_table(mp_rgb_yuv_table);
+}
+#endif /* CONFIG_HARDCODED_TABLES */
+
+#endif /* MOTIONPIXELS_TABLEGEN_H */