Make fill_rectangle() available for other decoders

Originally committed as revision 11219 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 121 insertions, 0 deletions

diff --git a/libavcodec/rectangle.h b/libavcodec/rectangle.h
new file mode 100644
index 0000000..4dd9028
--- /dev/null
+++ b/libavcodec/rectangle.h
@@ -0,0 +1,121 @@
+/*
+ * rectangle filling function
+ * Copyright (c) 2003 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
+ */
+
+/**
+ * @file rectangle.h
+ * useful rectangle filling function
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#ifndef FFMPEG_RECTANGLE_H
+#define FFMPEG_RECTANGLE_H
+
+#include "common.h"
+
+/**
+ * fill a rectangle.
+ * @param h height of the rectangle, should be a constant
+ * @param w width of the rectangle, should be a constant
+ * @param size the size of val (1 or 4), should be a constant
+ */
+static av_always_inline void fill_rectangle(void *vp, int w, int h, int stride, uint32_t val, int size){
+    uint8_t *p= (uint8_t*)vp;
+    assert(size==1 || size==4);
+    assert(w<=4);
+
+    w      *= size;
+    stride *= size;
+
+    assert((((long)vp)&(FFMIN(w, STRIDE_ALIGN)-1)) == 0);
+    assert((stride&(w-1))==0);
+    if(w==2){
+        const uint16_t v= size==4 ? val : val*0x0101;
+        *(uint16_t*)(p + 0*stride)= v;
+        if(h==1) return;
+        *(uint16_t*)(p + 1*stride)= v;
+        if(h==2) return;
+        *(uint16_t*)(p + 2*stride)= v;
+        *(uint16_t*)(p + 3*stride)= v;
+    }else if(w==4){
+        const uint32_t v= size==4 ? val : val*0x01010101;
+        *(uint32_t*)(p + 0*stride)= v;
+        if(h==1) return;
+        *(uint32_t*)(p + 1*stride)= v;
+        if(h==2) return;
+        *(uint32_t*)(p + 2*stride)= v;
+        *(uint32_t*)(p + 3*stride)= v;
+    }else if(w==8){
+    //gcc can't optimize 64bit math on x86_32
+#if defined(ARCH_X86_64) || (defined(MP_WORDSIZE) && MP_WORDSIZE >= 64)
+        const uint64_t v= val*0x0100000001ULL;
+        *(uint64_t*)(p + 0*stride)= v;
+        if(h==1) return;
+        *(uint64_t*)(p + 1*stride)= v;
+        if(h==2) return;
+        *(uint64_t*)(p + 2*stride)= v;
+        *(uint64_t*)(p + 3*stride)= v;
+    }else if(w==16){
+        const uint64_t v= val*0x0100000001ULL;
+        *(uint64_t*)(p + 0+0*stride)= v;
+        *(uint64_t*)(p + 8+0*stride)= v;
+        *(uint64_t*)(p + 0+1*stride)= v;
+        *(uint64_t*)(p + 8+1*stride)= v;
+        if(h==2) return;
+        *(uint64_t*)(p + 0+2*stride)= v;
+        *(uint64_t*)(p + 8+2*stride)= v;
+        *(uint64_t*)(p + 0+3*stride)= v;
+        *(uint64_t*)(p + 8+3*stride)= v;
+#else
+        *(uint32_t*)(p + 0+0*stride)= val;
+        *(uint32_t*)(p + 4+0*stride)= val;
+        if(h==1) return;
+        *(uint32_t*)(p + 0+1*stride)= val;
+        *(uint32_t*)(p + 4+1*stride)= val;
+        if(h==2) return;
+        *(uint32_t*)(p + 0+2*stride)= val;
+        *(uint32_t*)(p + 4+2*stride)= val;
+        *(uint32_t*)(p + 0+3*stride)= val;
+        *(uint32_t*)(p + 4+3*stride)= val;
+    }else if(w==16){
+        *(uint32_t*)(p + 0+0*stride)= val;
+        *(uint32_t*)(p + 4+0*stride)= val;
+        *(uint32_t*)(p + 8+0*stride)= val;
+        *(uint32_t*)(p +12+0*stride)= val;
+        *(uint32_t*)(p + 0+1*stride)= val;
+        *(uint32_t*)(p + 4+1*stride)= val;
+        *(uint32_t*)(p + 8+1*stride)= val;
+        *(uint32_t*)(p +12+1*stride)= val;
+        if(h==2) return;
+        *(uint32_t*)(p + 0+2*stride)= val;
+        *(uint32_t*)(p + 4+2*stride)= val;
+        *(uint32_t*)(p + 8+2*stride)= val;
+        *(uint32_t*)(p +12+2*stride)= val;
+        *(uint32_t*)(p + 0+3*stride)= val;
+        *(uint32_t*)(p + 4+3*stride)= val;
+        *(uint32_t*)(p + 8+3*stride)= val;
+        *(uint32_t*)(p +12+3*stride)= val;
+#endif
+    }else
+        assert(0);
+    assert(h==4);
+}
+
+#endif /* FFMPEG_RECTANGLE_H */