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From 3c20057d0cbbbed453a692d4dd4589d865808024 Mon Sep 17 00:00:00 2001
From: Liliana Marie Prikler <liliana.prikler@gmail.com>
Date: Sat, 29 Jan 2022 10:44:44 +0100
Subject: [PATCH] Add pkg-config fallback for locating ffmpeg.
Audacity >=3.1.0 no longer links against ffmpeg, but instead dynamically loads
it. This dynamic loading mechanism fails to properly locate libraries outside
of LD_LIBRARY_PATH.
See <https://issues.guix.gnu.org/53591>.
---
libraries/lib-ffmpeg-support/CMakeLists.txt | 8 ++++++++
libraries/lib-ffmpeg-support/FFmpegFunctions.cpp | 12 ++++++++++++
2 files changed, 20 insertions(+)
diff --git a/libraries/lib-ffmpeg-support/CMakeLists.txt b/libraries/lib-ffmpeg-support/CMakeLists.txt
index 8c5f06d7c..00810e4d0 100644
--- a/libraries/lib-ffmpeg-support/CMakeLists.txt
+++ b/libraries/lib-ffmpeg-support/CMakeLists.txt
@@ -1,5 +1,7 @@
if (${_OPT}use_ffmpeg)
+ pkg_check_modules(FFMPEG libavcodec libavformat libavutil)
+
set( SOURCES
FFmpegTypes.h
@@ -100,6 +102,12 @@ if (${_OPT}use_ffmpeg)
list(APPEND DEFINITIONS PRIVATE _DARWIN_C_SOURCE )
endif()
+ if (FFMPEG_FOUND)
+ pkg_get_variable(LIBAVCODEC_LIBDIR libavcodec libdir)
+ list(APPEND DEFINITIONS PRIVATE
+ "-DFFMPEG_PC_LIBDIR=\"${LIBAVCODEC_LIBDIR}\"")
+ endif()
+
audacity_library( lib-ffmpeg-support "${SOURCES}" "${LIBRARIES}"
"${DEFINITIONS}" ""
)
diff --git a/libraries/lib-ffmpeg-support/FFmpegFunctions.cpp b/libraries/lib-ffmpeg-support/FFmpegFunctions.cpp
index 66d085a0b..4eeb4aed3 100644
--- a/libraries/lib-ffmpeg-support/FFmpegFunctions.cpp
+++ b/libraries/lib-ffmpeg-support/FFmpegFunctions.cpp
@@ -238,6 +238,18 @@ struct FFmpegFunctions::Private final
if (library->IsLoaded())
return library;
+#if defined(FFMPEG_PC_LIBDIR)
+ {
+ static const wxString libdir{FFMPEG_PC_LIBDIR};
+ const wxString fullName = wxFileName(libdir, libraryName).GetFullPath();
+
+ auto library = std::make_shared<wxDynamicLibrary>(fullName);
+
+ if (library->IsLoaded())
+ return library;
+ }
+#endif
+
// Loading has failed.
// wxLogSysError doesn't report errors correctly on *NIX
#if defined(_WIN32)
--
2.34.0
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