[FFmpeg-cvslog] swscale/x86/rgb2rgb_template: handle the first 2 lines with C in rgb24toyv12_*()

[Michael Niedermayer]

ffmpeg | branch: release/2.3 | Michael Niedermayer <michaelni at gmx.at> | Thu Nov 20 00:43:45 2014 +0100| [dca70c59317869a8ff699fcb9bd17f9c184e4903] | committer: Michael Niedermayer

swscale/x86/rgb2rgb_template: handle the first 2 lines with C in rgb24toyv12_*()

This avoids out of array accesses
Should fix Ticket3451

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit 4388e78a0f022c8572996f9ab568a39b5f716f9d)

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=dca70c59317869a8ff699fcb9bd17f9c184e4903
---

 libswscale/x86/rgb2rgb_template.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/libswscale/x86/rgb2rgb_template.c b/libswscale/x86/rgb2rgb_template.c
index 3899d0a..7796d38 100644
--- a/libswscale/x86/rgb2rgb_template.c
+++ b/libswscale/x86/rgb2rgb_template.c
@@ -1634,6 +1634,16 @@ static inline void RENAME(rgb24toyv12)(const uint8_t *src, uint8_t *ydst, uint8_
 #define BGR2V_IDX "16*4+16*34"
     int y;
     const x86_reg chromWidth= width>>1;
+
+    if (height > 2) {
+        ff_rgb24toyv12_c(src, ydst, udst, vdst, width, 2, lumStride, chromStride, srcStride, rgb2yuv);
+        src  += 2*srcStride;
+        ydst += 2*lumStride;
+        udst += chromStride;
+        vdst += chromStride;
+        height -= 2;
+    }
+
     for (y=0; y<height-2; y+=2) {
         int i;
         for (i=0; i<2; i++) {