[FFmpeg-cvslog] avformat/mov: Avoid float usage in yuv_to_rgba()

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri May 29 12:06:51 2015 +0200| [e1b0019568430ee80c3bb474829897700ef31f1c] | committer: Michael Niedermayer

avformat/mov: Avoid float usage in yuv_to_rgba()

This avoids the possibility for rounding/precision differences between platforms

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e1b0019568430ee80c3bb474829897700ef31f1c
---

 libavformat/mov.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 51cdd21..6072934 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1711,9 +1711,9 @@ static uint32_t yuv_to_rgba(uint32_t ycbcr)
     cr = (ycbcr >> 8)  & 0xFF;
     cb =  ycbcr        & 0xFF;
 
-    b = av_clip_uint8(1.164 * (y - 16)                      + 2.018 * (cb - 128));
-    g = av_clip_uint8(1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128));
-    r = av_clip_uint8(1.164 * (y - 16) + 1.596 * (cr - 128));
+    b = av_clip_uint8((1164 * (y - 16)                     + 2018 * (cb - 128)) / 1000);
+    g = av_clip_uint8((1164 * (y - 16) -  813 * (cr - 128) -  391 * (cb - 128)) / 1000);
+    r = av_clip_uint8((1164 * (y - 16) + 1596 * (cr - 128)                    ) / 1000);
 
     return (r << 16) | (g << 8) | b;
 }