frsh: Export information about the last RTP contract and VRES

[frescor/ffmpeg.git] / libavcodec / rle.c

diff --git a/libavcodec/rle.c b/libavcodec/rle.c
index aa05f6d513a903b877d6f5c15cdfd966084ca529..6e468f8991e00b49d67dda7a8366b9a266f28dbe 100644 (file)
--- a/libavcodec/rle.c
+++ b/libavcodec/rle.c
@@ -17,7 +17,6 @@
  * 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
- *
  */
 #include "avcodec.h"
 #include "rle.h"
@@ -36,12 +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,
@@ -55,38 +54,27 @@ static int count_pixels(const uint8_t *start, int len, int bpp, int same)
     return count;
 }
 
-/**
- * RLE compress the row, with maximum size of out_size. Value before repeated bytes is (count ^ xor) + add.
- * @param outbuf Output buffer
- * @param out_size Maximum output size
- * @param ptr Input buffer
- * @param bpp Bytes per pixel
- * @param w Image width
- * @return Size of output in bytes, or -1 if larger than out_size
- */
-int ff_rle_encode(uint8_t *outbuf, int out_size, const uint8_t *ptr , int bpp, int w, int8_t add, uint8_t xor)
+int ff_rle_encode(uint8_t *outbuf, int out_size, const uint8_t *ptr , int bpp, int w,
+                  int add_rep, int xor_rep, int add_raw, int xor_raw)
 {
     int count, x;
-    uint8_t *out;
-
-    out = outbuf;
-
+    uint8_t *out = outbuf;
 
-        for(x = 0; x < w; x += count) {
-            /* see if we can encode the next set of pixels with RLE */
-            if((count = count_pixels(ptr, w-x, bpp, 1)) > 1) {
-                if(out + bpp + 1 > outbuf + out_size) return -1;
-                *out++ = (count ^ xor) + add;
-                memcpy(out, ptr, bpp);
-                out += bpp;
-            } else {
-                /* fall back on uncompressed */
-                count = count_pixels(ptr, w-x, bpp, 0);
-                *out++ = count - 1;
+    for(x = 0; x < w; x += count) {
+        /* see if we can encode the next set of pixels with RLE */
+        if((count = count_pixels(ptr, w-x, bpp, 1)) > 1) {
+            if(out + bpp + 1 > outbuf + out_size) return -1;
+            *out++ = (count ^ xor_rep) + add_rep;
+            memcpy(out, ptr, bpp);
+            out += bpp;
+        } else {
+            /* fall back on uncompressed */
+            count = count_pixels(ptr, w-x, bpp, 0);
+            if(out + bpp*count >= outbuf + out_size) return -1;
+            *out++ = (count ^ xor_raw) + add_raw;
 
-                if(out + bpp*count > outbuf + out_size) return -1;
-                memcpy(out, ptr, bpp * count);
-                out += bpp * count;
+            memcpy(out, ptr, bpp * count);
+            out += bpp * count;
         }
 
         ptr += count * bpp;