[FFmpeg-cvslog] avcodec/exr: use the correct step value for plane pointers

[James Almer]

ffmpeg | branch: master | James Almer <jamrial at gmail.com> | Wed Mar  5 12:59:34 2025 -0300| [5560a20d770ef77eaf7cf885e9678125c6640953] | committer: James Almer

avcodec/exr: use the correct step value for plane pointers

Fixes a regression since 0e917389fe73c932049635d947bba076f1709589.

Signed-off-by: James Almer <jamrial at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5560a20d770ef77eaf7cf885e9678125c6640953
---

 libavcodec/exr.c                              | 2 +-
 tests/ref/fate/exr-rgb-tile-half-piz-dw-large | 2 +-
 tests/ref/fate/exr-rgb-tile-half-zip          | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/libavcodec/exr.c b/libavcodec/exr.c
index 7e8020a0ff..3eed4b3c87 100644
--- a/libavcodec/exr.c
+++ b/libavcodec/exr.c
@@ -1375,7 +1375,7 @@ static int decode_block(AVCodecContext *avctx, void *tdata,
 
         for (c = 0; c < channel_count; c++) {
             int plane = s->desc->comp[c].plane;
-            ptr = p->data[plane] + window_ymin * p->linesize[plane] + (window_xmin * 4);
+            ptr = p->data[plane] + window_ymin * p->linesize[plane] + (window_xmin * step);
 
             for (i = 0; i < ysize; i++, ptr += p->linesize[plane]) {
                 const uint8_t *src;
diff --git a/tests/ref/fate/exr-rgb-tile-half-piz-dw-large b/tests/ref/fate/exr-rgb-tile-half-piz-dw-large
index 196b9b155b..6ad531a4c9 100644
--- a/tests/ref/fate/exr-rgb-tile-half-piz-dw-large
+++ b/tests/ref/fate/exr-rgb-tile-half-piz-dw-large
@@ -3,4 +3,4 @@
 #codec_id 0: rawvideo
 #dimensions 0: 50x50
 #sar 0: 1/1
-0,          0,          0,        1,    30000, 0xa02a541c
+0,          0,          0,        1,    30000, 0xef01f54f
diff --git a/tests/ref/fate/exr-rgb-tile-half-zip b/tests/ref/fate/exr-rgb-tile-half-zip
index 0ad1a47dbe..afadee5995 100644
--- a/tests/ref/fate/exr-rgb-tile-half-zip
+++ b/tests/ref/fate/exr-rgb-tile-half-zip
@@ -3,4 +3,4 @@
 #codec_id 0: rawvideo
 #dimensions 0: 501x401
 #sar 0: 1/1
-0,          0,          0,        1,  2410812, 0x0deb5853
+0,          0,          0,        1,  2410812, 0x30fd8688