[FFmpeg-cvslog] avcodec/qtrle : 32bpp dec copy two raw argb value at the same time

[Martin Vignali]

ffmpeg | branch: master | Martin Vignali <martin.vignali at gmail.com> | Tue Feb 26 10:38:10 2019 +0100| [3278ea67c8f2a7c1aea8fd3114b35983791e6732] | committer: Martin Vignali

avcodec/qtrle : 32bpp dec copy two raw argb value at the same time

benchmark on x86_64 :
38 fps -> 40 fps

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3278ea67c8f2a7c1aea8fd3114b35983791e6732
---

 libavcodec/qtrle.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/libavcodec/qtrle.c b/libavcodec/qtrle.c
index bb55ba8a86..febfea3029 100644
--- a/libavcodec/qtrle.c
+++ b/libavcodec/qtrle.c
@@ -346,7 +346,7 @@ static void qtrle_decode_24bpp(QtrleContext *s, int row_ptr, int lines_to_change
 
 static void qtrle_decode_32bpp(QtrleContext *s, int row_ptr, int lines_to_change)
 {
-    int rle_code;
+    int rle_code, rle_code_half;
     int pixel_ptr;
     int row_inc = s->frame->linesize[0];
     unsigned int argb;
@@ -379,10 +379,15 @@ static void qtrle_decode_32bpp(QtrleContext *s, int row_ptr, int lines_to_change
                 CHECK_PIXEL_PTR(rle_code * 4);
 
                 /* copy pixels directly to output */
-                while (rle_code--) {
-                    argb = bytestream2_get_ne32(&s->g);
-                    AV_WN32A(rgb + pixel_ptr, argb);
-                    pixel_ptr  += 4;
+                rle_code_half = rle_code / 2;
+                while (rle_code_half--) { /* copy 2 argb raw value at the same time */
+                    AV_WN64A(rgb + pixel_ptr, bytestream2_get_ne64(&s->g));
+                    pixel_ptr += 8;
+                }
+
+                if (rle_code % 2 != 0){ /* not even raw value */
+                    AV_WN32A(rgb + pixel_ptr, bytestream2_get_ne32(&s->g));
+                    pixel_ptr += 4;
                 }
             }
         }