feat(build): add avcpp deps

CMakeLists.txt

@@ -14,15 +14,25 @@ pkg_check_modules(FFMPEG REQUIRED IMPORTED_TARGET
     libavutil
 )
 
+find_package(avcpp REQUIRED)
+
 # ##############################################################################
 
+add_executable(mosh-me-2
+    ${PROJECT_SOURCE_DIR}/app/mosh-me-2.cpp
+)
+target_link_libraries(mosh-me-2 avcpp::avcpp spdlog::spdlog)
+target_compile_features(mosh-me-2 PUBLIC cxx_std_23)
+target_include_directories(mosh-me-2 PRIVATE ${PROJECT_SOURCE_DIR}/include)
+
 add_executable(mosh-me ${PROJECT_SOURCE_DIR}/app/mosh-me.cpp)
 
 target_link_libraries(mosh-me PkgConfig::FFMPEG spdlog::spdlog)
 target_compile_features(mosh-me PUBLIC cxx_std_23)
 target_include_directories(mosh-me PRIVATE ${PROJECT_SOURCE_DIR}/include)
 
-install(TARGETS mosh-me)
+
+install(TARGETS mosh-me mosh-me-2)
 
 ################################################################################
 

app/mosh-me-2.cpp

@@ -0,0 +1,3 @@
+#include <spdlog/spdlog.h>
+
+int main() { spdlog::info("MM2"); }

flake.nix

@@ -10,6 +10,9 @@
         overlays.mosh-me = final: prev: {
           mosh-me = final.callPackage ./nix/mosh-me.nix {};
         };
+        overlays.avcpp = final: prev: {
+          avcpp = final.callPackage ./nix/avcpp.nix {};
+        };
       };
       systems = [
         "x86_64-linux"
@@ -24,6 +27,7 @@
           inherit system;
           overlays = [
             self.overlays.mosh-me
+            self.overlays.avcpp
           ];
           config = {};
         };

nix/0001-fix-build-use-absolute-install-directories.patch

@@ -0,0 +1,62 @@
+From ee5bad7f97fd1cdbc97bf46d2dd17cd8974b6922 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Jonas=20R=C3=B6ger?= <jonas.roeger@tu-dortmund.de>
+Date: Sun, 23 Nov 2025 19:11:49 +0100
+Subject: [PATCH] fix(build): use absolute install directories
+
+---
+ src/CMakeLists.txt | 18 +++++++++---------
+ 1 file changed, 9 insertions(+), 9 deletions(-)
+
+diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
+index b4b53ca..c08d9bb 100644
+--- a/src/CMakeLists.txt
++++ b/src/CMakeLists.txt
+@@ -33,7 +33,7 @@ foreach(TARGET ${AV_TARGETS})
+     target_include_directories(${TARGET}
+         PUBLIC
+           $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}>
+-          $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/avcpp>
++          $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+         PRIVATE
+           ${CMAKE_CURRENT_SOURCE_DIR})
+     set_target_properties(${TARGET} PROPERTIES PUBLIC_HEADER "${AV_HEADERS}")
+@@ -77,12 +77,12 @@ if (AVCPP_NOT_SUBPROJECT)
+ 
+     install(TARGETS ${AV_TARGETS} FFmpeg
+         EXPORT avcpp-targets
+-        LIBRARY DESTINATION        ${CMAKE_INSTALL_LIBDIR}
+-        ARCHIVE DESTINATION        ${CMAKE_INSTALL_LIBDIR}
+-        RUNTIME DESTINATION        ${CMAKE_INSTALL_BINDIR}
+-        INCLUDES DESTINATION       ${CMAKE_INSTALL_INCLUDEDIR}/avcpp
+-        PRIVATE_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/avcpp
+-        PUBLIC_HEADER DESTINATION  ${CMAKE_INSTALL_INCLUDEDIR}/avcpp)
++        LIBRARY DESTINATION        ${CMAKE_INSTALL_FULL_LIBDIR}
++        ARCHIVE DESTINATION        ${CMAKE_INSTALL_FULL_LIBDIR}
++        RUNTIME DESTINATION        ${CMAKE_INSTALL_FULL_BINDIR}
++        INCLUDES DESTINATION       ${CMAKE_INSTALL_FULL_INCLUDEDIR}/avcpp
++        PRIVATE_HEADER DESTINATION ${CMAKE_INSTALL_FULL_INCLUDEDIR}/avcpp
++        PUBLIC_HEADER DESTINATION  ${CMAKE_INSTALL_FULL_INCLUDEDIR}/avcpp)
+ 
+     #cmake_policy(SET CMP0022 OLD)
+     install(EXPORT avcpp-targets
+@@ -94,7 +94,7 @@ if (AVCPP_NOT_SUBPROJECT)
+     configure_package_config_file(
+       "Config.cmake.in"
+       "avcpp-config.cmake"
+-      INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/avcpp
++      INSTALL_DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR}/cmake/avcpp
+ #      PATH_VARS
+ #        CMAKE_INSTALL_LIBDIR
+       )
+@@ -106,7 +106,7 @@ if (AVCPP_NOT_SUBPROJECT)
+           "${CMAKE_CURRENT_BINARY_DIR}/avcpp-config.cmake"
+           "${CMAKE_CURRENT_BINARY_DIR}/avcpp-config-version.cmake"
+         DESTINATION
+-          "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}/cmake/avcpp"
++          "${CMAKE_INSTALL_FULL_LIBDIR}/cmake/avcpp"
+       )
+ 
+     if (PKG_CONFIG_FOUND)
+-- 
+2.50.1
+

nix/avcpp.nix

@@ -0,0 +1,31 @@
+{
+  cmake,
+  lib,
+  stdenv,
+  pkg-config,
+  ffmpeg_7,
+  fetchFromGitHub,
+}: let
+  version = "2.7.1";
+  sha256 = "sha256-Vf5DkAX2zXlNd7zsQc5SQfNiKHpasRZpt7ppoLzlig0=";
+in
+  stdenv.mkDerivation (finalAttrs: {
+    pname = "avcpp";
+    inherit version;
+    src = fetchFromGitHub {
+      owner = "h4tr3d";
+      repo = "avcpp";
+      tag = "v${version}";
+      inherit sha256;
+    };
+    patches = [
+      ./0001-fix-build-use-absolute-install-directories.patch
+    ];
+    nativeBuildInputs = [cmake pkg-config];
+    buildInputs = [ffmpeg_7];
+    cmakeFlags = [
+      (lib.cmakeBool "BUILD_TESTING" finalAttrs.doCheck)
+      (lib.cmakeBool "AVCPP_NOT_SUBPROJECT" true)
+    ];
+    doCheck = stdenv.buildPlatform.canExecute stdenv.hostPlatform;
+  })

nix/mosh-me.nix

@@ -5,13 +5,14 @@
   spdlog,
   stdenv,
   pkg-config,
-  ffmpeg,
+  ffmpeg_7,
+  avcpp,
 }:
 stdenv.mkDerivation (finalAttrs: {
   name = "mosh-me";
   src = ../.;
   nativeBuildInputs = [cmake ninja pkg-config];
-  buildInputs = [ffmpeg spdlog];
+  buildInputs = [ffmpeg_7 spdlog avcpp];
   cmakeFlags = [
     (lib.cmakeBool "BUILD_TESTING" finalAttrs.doCheck)
   ];