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authorTom Schouten <doelie@users.sourceforge.net>2003-01-21 10:27:33 +0000
committerTom Schouten <doelie@users.sourceforge.net>2003-01-21 10:27:33 +0000
commit9b8745d5250c9d0b60c9aa5a77f58a3fcddf1076 (patch)
tree8372b6a414a7124cec57efc9c80845e2bc1b157d /system/pdp_llconv_portable.c
This commit was generated by cvs2svn to compensate for changes in r352,svn2git-root
which included commits to RCS files with non-trunk default branches. svn path=/trunk/externals/pdp/; revision=353
Diffstat (limited to 'system/pdp_llconv_portable.c')
-rw-r--r--system/pdp_llconv_portable.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/system/pdp_llconv_portable.c b/system/pdp_llconv_portable.c
new file mode 100644
index 0000000..de65ef5
--- /dev/null
+++ b/system/pdp_llconv_portable.c
@@ -0,0 +1,81 @@
+
+/*
+ * Pure Data Packet system implementation. : portable low level format conversion code
+ * Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#define CLAMP(x) (((x)<0) ? 0 : ((x>255)? 255 : (x)))
+#define FP(x) ((int)(((float)(x)) * 256.0f))
+
+void pixel_unpack_portable_u8s16_y(unsigned char *src ,short int *dst, unsigned int nbpixels)
+{
+ unsigned int i;
+ for (i=0; i<nbpixels; i++) dst[i] = ((short int)(src[i])) << 7;
+}
+
+void pixel_unpack_portable_u8s16_uv(unsigned char *src ,short int *dst, unsigned int nbpixels)
+{
+ unsigned int i;
+ for (i=0; i<nbpixels; i++) dst[i] = (((short int)(src[i])) << 8) ^ 0x8000;
+}
+
+
+void pixel_pack_portable_s16u8_y(short int *src, unsigned char *dst, unsigned int nbpixels)
+{
+ unsigned int i;
+ for (i=0; i<nbpixels; i++) dst[i] = (unsigned char)(CLAMP(src[i]>>7));
+}
+
+void pixel_pack_portable_s16u8_uv(short int *src, unsigned char *dst, unsigned int nbpixels)
+{
+ unsigned int i;
+ for (i=0; i<nbpixels; i++) dst[i] = (unsigned char)((src[i]^0x8000)>>8);
+}
+
+
+/* convert greyscale 8 bit unsigned to 16bit signed */
+void llconv_grey_s16u8(short int *src, unsigned char *dst, unsigned int nbpixels)
+{
+ pixel_pack_portable_s16u8_y(src, dst, nbpixels);
+}
+
+/* convert yvu planar 411 16 bit signed to 8 bit unsigned */
+void llconv_yvu_planar_s16u8(short int *src, unsigned char *dst, unsigned int nbpixels)
+{
+ pixel_pack_portable_s16u8_y(src, dst, nbpixels);
+ pixel_pack_portable_s16u8_uv(src + nbpixels, dst + nbpixels, nbpixels>>1);
+
+}
+
+
+/* convert yvu planar 411 8 bit unsigned to yv12 planar 16bit signed */
+void llconv_yvu_planar_u8s16(unsigned char* source, short int *dest, int nbpixels)
+{
+ pixel_unpack_portable_u8s16_y(source, dest, nbpixels);
+ pixel_unpack_portable_u8s16_uv(&source[nbpixels], &dest[nbpixels], nbpixels>>1);
+}
+
+/* convert yuv planar 411 8 bit unsigned to yv12 planar 16bit signed */
+void llconv_yuv_planar_u8s16(unsigned char* source, short int *dest, int nbpixels)
+{
+ pixel_unpack_portable_u8s16_y(source, dest, nbpixels);
+ pixel_unpack_portable_u8s16_uv(&source[nbpixels], &dest[nbpixels + (nbpixels>>2)], nbpixels>>2);
+ pixel_unpack_portable_u8s16_uv(&source[nbpixels + (nbpixels>>2)], &dest[nbpixels], nbpixels>>2);
+}
+
+