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theora: Add upstream patch to fix UB warning

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Patch from https://git.xiph.org/?p=theora.git;a=commit;h=0ae66d565e6bead8604d312bc1a4e9dccf245c88
Fixes #25221.
This commit is contained in:
Rémi Verschelde 2019-01-23 12:02:34 +01:00
parent f4b747d3e6
commit 8c67b43ba1
3 changed files with 45 additions and 4 deletions
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3
thirdparty/README.md vendored
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@ -202,6 +202,9 @@ Files extracted from upstream source:
- all .h files in include/theora/ as theora/
- COPYING and LICENSE
Upstream patches included in the `patches` directory have been applied
on top of the 1.1.1 source (not included in any stable release yet).
## libvorbis

8
thirdparty/libtheora/decode.c vendored
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@ -397,10 +397,10 @@ static int oc_dec_init(oc_dec_ctx *_dec,const th_info *_info,
int qsum;
qsum=0;
for(qti=0;qti<2;qti++)for(pli=0;pli<3;pli++){
qsum+=_dec->state.dequant_tables[qti][pli][qi][12]+
_dec->state.dequant_tables[qti][pli][qi][17]+
_dec->state.dequant_tables[qti][pli][qi][18]+
_dec->state.dequant_tables[qti][pli][qi][24]<<(pli==0);
qsum+=_dec->state.dequant_tables[qi][pli][qti][12]+
_dec->state.dequant_tables[qi][pli][qti][17]+
_dec->state.dequant_tables[qi][pli][qti][18]+
_dec->state.dequant_tables[qi][pli][qti][24]<<(pli==0);
}
_dec->pp_sharp_mod[qi]=-(qsum>>11);
}

38
thirdparty/libtheora/patches/theora.git-0ae66d565e6bead8604d312bc1a4e9dccf245c88.patch vendored Normal file
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@ -0,0 +1,38 @@
From 0ae66d565e6bead8604d312bc1a4e9dccf245c88 Mon Sep 17 00:00:00 2001
From: Tim Terriberry <tterribe@xiph.org>
Date: Tue, 8 May 2012 02:51:57 +0000
Subject: [PATCH] Fix pp_sharp_mod calculation.
This was broken when the dequant_tables indexing changed in commit
r16102, but it only affected post-processing quality, so we never
noticed.
With gcc 4.8.0, this can now trigger a segfault during decoder
initialization.
svn path=/trunk/theora/; revision=18268
---
decode.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/decode.c b/decode.c
index b803505..9f2516a 100644
--- a/decode.c
+++ b/decode.c
@@ -400,10 +400,10 @@ static int oc_dec_init(oc_dec_ctx *_dec,const th_info *_info,
int qsum;
qsum=0;
for(qti=0;qti<2;qti++)for(pli=0;pli<3;pli++){
- qsum+=_dec->state.dequant_tables[qti][pli][qi][12]+
- _dec->state.dequant_tables[qti][pli][qi][17]+
- _dec->state.dequant_tables[qti][pli][qi][18]+
- _dec->state.dequant_tables[qti][pli][qi][24]<<(pli==0);
+ qsum+=_dec->state.dequant_tables[qi][pli][qti][12]+
+ _dec->state.dequant_tables[qi][pli][qti][17]+
+ _dec->state.dequant_tables[qi][pli][qti][18]+
+ _dec->state.dequant_tables[qi][pli][qti][24]<<(pli==0);
}
_dec->pp_sharp_mod[qi]=-(qsum>>11);
}
--
2.11.0