[FFmpeg-cvslog] libavcodec/imgconvert.c: support left band while cropping

[Przemysław Sobala]

ffmpeg | branch: master | Przemysław Sobala <przemyslaw.sobala at grupawp.pl> | Fri Jun 12 18:38:05 2015 +0200| [c39637f36aa3a942efaa098854bd0c2ae612bcd0] | committer: Michael Niedermayer

libavcodec/imgconvert.c: support left band while cropping

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c39637f36aa3a942efaa098854bd0c2ae612bcd0
---

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

diff --git a/libavcodec/imgconvert.c b/libavcodec/imgconvert.c
index 8cb6099..dc67560 100644
--- a/libavcodec/imgconvert.c
+++ b/libavcodec/imgconvert.c
@@ -201,12 +201,14 @@ int av_picture_crop(AVPicture *dst, const AVPicture *src,
     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
     int y_shift;
     int x_shift;
+    int max_step[4];
 
     if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB)
         return -1;
 
     y_shift = desc->log2_chroma_h;
     x_shift = desc->log2_chroma_w;
+    av_image_fill_max_pixsteps(max_step, NULL, desc);
 
     if (is_yuv_planar(desc)) {
     dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
@@ -215,9 +217,7 @@ int av_picture_crop(AVPicture *dst, const AVPicture *src,
     } else{
         if(top_band % (1<<y_shift) || left_band % (1<<x_shift))
             return -1;
-        if(left_band) //FIXME add support for this too
-            return -1;
-        dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
+        dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + (left_band * max_step[0]);
     }
 
     dst->linesize[0] = src->linesize[0];