[FFmpeg-devel] [PATCH]lavc/qtrle: Do not use aligned writes for odd addresses.

[Carl Eugen Hoyos]

Hi!

Attached patch fixes the qtrle crash on sparc for me.

Please comment, Carl Eugen

From a94d32d63cff248d2eb633b162e9e4d4f7234ee5 Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <ceffm...@gmail.com>
Date: Fri, 15 Mar 2019 00:02:48 +0100
Subject: [PATCH] lavc/qtrle: Do not used aligned writes for odd addresses.

pixel_ptr can be 3.
Fixes crashes on systems that do not allow unaligned access.
---
 libavcodec/qtrle.c |   14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/libavcodec/qtrle.c b/libavcodec/qtrle.c
index a744d7b..1351532 100644
--- a/libavcodec/qtrle.c
+++ b/libavcodec/qtrle.c
@@ -325,7 +325,7 @@ static void qtrle_decode_24bpp(QtrleContext *s, int row_ptr, int lines_to_change
                 CHECK_PIXEL_PTR(rle_code * 3);
 
                 while (rle_code--) {
-                    AV_WN16A(rgb + pixel_ptr, rg);
+                    AV_WN16(rgb + pixel_ptr, rg);
                     rgb[pixel_ptr + 2] = b;
                     pixel_ptr += 3;
                 }
@@ -335,13 +335,13 @@ static void qtrle_decode_24bpp(QtrleContext *s, int row_ptr, int lines_to_change
                 rle_code_half = rle_code / 2;
 
                 while (rle_code_half--) { /* copy 2 raw rgb value at the same time */
-                    AV_WN32A(rgb + pixel_ptr, bytestream2_get_ne32(&s->g)); /* rgbr */
-                    AV_WN16A(rgb + pixel_ptr + 4, bytestream2_get_ne16(&s->g)); /* rgbr */
+                    AV_WN32(rgb + pixel_ptr, bytestream2_get_ne32(&s->g)); /* rgbr */
+                    AV_WN16(rgb + pixel_ptr + 4, bytestream2_get_ne16(&s->g)); /* rgbr */
                     pixel_ptr += 6;
                 }
 
                 if (rle_code % 2 != 0){ /* not even raw value */
-                    AV_WN16A(rgb + pixel_ptr, bytestream2_get_ne16(&s->g));
+                    AV_WN16(rgb + pixel_ptr, bytestream2_get_ne16(&s->g));
                     rgb[pixel_ptr + 2] = bytestream2_get_byte(&s->g);
                     pixel_ptr += 3;
                 }
@@ -379,7 +379,7 @@ static void qtrle_decode_32bpp(QtrleContext *s, int row_ptr, int lines_to_change
                 CHECK_PIXEL_PTR(rle_code * 4);
 
                 while (rle_code--) {
-                    AV_WN32A(rgb + pixel_ptr, argb);
+                    AV_WN32(rgb + pixel_ptr, argb);
                     pixel_ptr += 4;
                 }
             } else {
@@ -388,12 +388,12 @@ static void qtrle_decode_32bpp(QtrleContext *s, int row_ptr, int lines_to_change
                 /* copy pixels directly to output */
                 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));
+                    AV_WN64(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));
+                    AV_WN32(rgb + pixel_ptr, bytestream2_get_ne32(&s->g));
                     pixel_ptr += 4;
                 }
             }
-- 
1.7.10.4


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