change rle encoder to count up to 127, sgi does not support 128

Originally committed as revision 12631 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/rle.c

@@ -35,12 +35,12 @@ static int count_pixels(const uint8_t *start, int len, int bpp, int same)
     const uint8_t *pos;
     int count = 1;
 
-    for(pos = start + bpp; count < FFMIN(128, len); pos += bpp, count ++) {
+    for(pos = start + bpp; count < FFMIN(127, len); pos += bpp, count ++) {
         if(same != !memcmp(pos-bpp, pos, bpp)) {
             if(!same) {
                 /* if bpp == 1, then 0 1 1 0 is more efficiently encoded as a single
                  * raw block of pixels.  for larger bpp, RLE is as good or better */
-                if(bpp == 1 && count + 1 < FFMIN(128, len) && *pos != *(pos+1))
+                if(bpp == 1 && count + 1 < FFMIN(127, len) && *pos != *(pos+1))
                     continue;
 
                 /* if RLE can encode the next block better than as a raw block,

tests/libav.regression.ref

@@ -58,9 +58,9 @@ c3a9f333ddebff6eae3f4360bad2de29 *./tests/data/b-libav02.bmp
 ./tests/data/b-libav%02d.tga CRC=0xf3a66ecf
 f558eef0740c4b247f1eb17e1dbf7adf *./tests/data/b-libav02.tga
 ./tests/data/b-libav%02d.tiff CRC=0x25c06ecf
-3076b16ac0c8a39a796e69944f6a40dc *./tests/data/b-libav02.tiff
-./tests/data/b-libav%02d.sgi CRC=0x00000001
-c6cab058a2b0a33ee843bd096b280075 *./tests/data/b-libav02.sgi
+7211a09803f104e59196bc712a819e69 *./tests/data/b-libav02.tiff
+./tests/data/b-libav%02d.sgi CRC=0x25c06ecf
+50a1d8ca27813084e20b7ae0b8f9d663 *./tests/data/b-libav02.sgi
 ./tests/data/b-libav%02d.jpg CRC=0x62328baa
 5d6c53e5297c4485e26c25e37885376f *./tests/data/b-libav02.jpg
 b0a8c8063d81921db5d7c8f50a1cc454 *./tests/data/b-libav.wav