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authorHendrik Leppkes <h.leppkes@gmail.com>2016-11-14 12:03:00 +0100
committerHendrik Leppkes <h.leppkes@gmail.com>2016-11-14 12:03:00 +0100
commit25004c7e6eaa91c749763c1dabb41c4fc9c692e2 (patch)
treec93117ce4304bcff0a94ace38ce06f22c86653a2 /libavcodec/rle.c
parent444e65299ba5cbf390439e27ce2cb91dff0e5aa7 (diff)
parenteeb6849cedac099d41feb482da581f4059c63ca7 (diff)
downloadffmpeg-25004c7e6eaa91c749763c1dabb41c4fc9c692e2.tar.gz
Merge commit 'eeb6849cedac099d41feb482da581f4059c63ca7'
* commit 'eeb6849cedac099d41feb482da581f4059c63ca7': rle: K&R formatting cosmetics Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>
Diffstat (limited to 'libavcodec/rle.c')
-rw-r--r--libavcodec/rle.c34
1 files changed, 20 insertions, 14 deletions
diff --git a/libavcodec/rle.c b/libavcodec/rle.c
index 7924ea780f..792bc05e5d 100644
--- a/libavcodec/rle.c
+++ b/libavcodec/rle.c
@@ -18,26 +18,29 @@
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+#include "libavutil/common.h"
+
#include "avcodec.h"
#include "rle.h"
-#include "libavutil/common.h"
int ff_rle_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(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(127, len) && *pos != *(pos+1))
+ 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(127, len) && *pos != *(pos + 1))
continue;
/* if RLE can encode the next block better than as a raw block,
* back up and leave _all_ the identical pixels for RLE */
- count --;
+ count--;
}
break;
}
@@ -46,25 +49,28 @@ int ff_rle_count_pixels(const uint8_t *start, int len, int bpp, int same)
return count;
}
-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 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 = outbuf;
- for(x = 0; x < w; x += count) {
+ for (x = 0; x < w; x += count) {
/* see if we can encode the next set of pixels with RLE */
if ((count = ff_rle_count_pixels(ptr, w - x, bpp, 1)) > 1) {
- if(out + bpp + 1 > outbuf + out_size) return -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 = ff_rle_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;
+ *out++ = (count ^ xor_raw) + add_raw;
memcpy(out, ptr, bpp * count);
out += bpp * count;
}