deps.ffmpeg: Add libdatachannel

Co-authored-by: pkv <pkv@obsproject.com>

deps.ffmpeg/70-libdatachannel.zsh

@@ -0,0 +1,116 @@
+autoload -Uz log_debug log_error log_info log_status log_output
+
+## Dependency Information
+local name='libdatachannel'
+local version='v0.19.0-alpha.3'
+local url='https://github.com/paullouisageneau/libdatachannel.git'
+local hash='506961b84c3a28ddfb722eb2bc76e2dce2d76765'
+local -a patches=(
+  "* ${0:a:h}/patches/libdatachannel/0001-Fix-mbedtls-cmake-objdump.patch \
+    728af402fe8ebf33107b65422d569f0ea4af2e1e17207fbe2fb9a8684c187385"
+)
+## Dependency Overrides
+local -i shared_libs=1
+local dir="${name}-${version}"
+
+## Build Steps
+setup() {
+  log_info "Setup (%F{3}${target}%f)"
+  setup_dep ${url} ${hash}
+}
+
+clean() {
+  cd "${dir}"
+
+  if [[ ${clean_build} -gt 0 && -d "build_${arch}" ]] {
+    log_info "Clean build directory (%F{3}${target}%f)"
+
+    rm -rf "build_${arch}"
+  }
+}
+
+config() {
+  autoload -Uz mkcd progress
+
+  local _onoff=(OFF ON)
+
+  args=(
+    ${cmake_flags}
+    -DENABLE_SHARED="${_onoff[(( shared_libs + 1 ))]}"
+    -DUSE_MBEDTLS=1
+    -DNO_WEBSOCKET=1
+    -DNO_TESTS=1
+    -DNO_EXAMPLES=1
+  )
+  case ${target} {
+    windows-x*)
+      args+=(
+        -DCMAKE_CXX_FLAGS="-static-libgcc -static-libstdc++ -w -pipe -fno-semantic-interposition -static"
+        -DCMAKE_C_FLAGS="-static-libgcc -w -pipe -fno-semantic-interposition -static"
+        -DCMAKE_SHARED_LINKER_FLAGS="-static-libgcc -static-libstdc++ -L${target_config[output_dir]}/lib -Wl,--exclude-libs,ALL -static"
+        -DCMAKE_TOOLCHAIN_FILE="${target_config[posix_toolchain]}"
+      )
+}
+  log_info "Config (%F{3}${target}%f)"
+  cd "${dir}"
+  log_debug "CMake configuration options: ${args}'"
+  progress cmake -S . -B "build_${arch}" -G Ninja ${args}
+}
+
+build() {
+  autoload -Uz mkcd progress
+
+  log_info "Build (%F{3}${target}%f)"
+
+  cd "${dir}"
+
+  args=(
+    --build "build_${arch}"
+    --config "${config}"
+  )
+
+  if (( _loglevel > 1 )) args+=(--verbose)
+
+  cmake ${args}
+}
+
+install() {
+  autoload -Uz progress
+
+  log_info "Install (%F{3}${target}%f)"
+
+  args=(
+    --install "build_${arch}"
+    --config "${config}"
+  )
+
+  if [[ "${config}" =~ "Release|MinSizeRel" ]] args+=(--strip)
+  if (( _loglevel > 1 )) args+=(--verbose)
+
+  cd "${dir}"
+  progress cmake ${args}
+}
+
+fixup() {
+  cd "${dir}"
+
+  case ${target} {
+    windows*)
+      log_info "Fixup (%F{3}${target}%f)"
+      if (( shared_libs )) {
+        autoload -Uz create_importlibs
+        create_importlibs ${target_config[output_dir]}/bin/libdatachannel*.dll
+        log_status "Fixing CMake for MSVC import library syntax"
+        if [[ "${config}" = "Release" ]] {
+          sed -i 's/libdatachannel.dll.a/libdatachannel.lib/g' ${target_config[output_dir]}/lib/cmake/LibDataChannel/LibDataChannelTargets-release.cmake
+        }
+        if [[ "${config}" = "RelWithDebInfo" ]] {
+          sed -i 's/libdatachannel.dll.a/libdatachannel.lib/g' ${target_config[output_dir]}/lib/cmake/LibDataChannel/LibDataChannelTargets-relwithdebinfo.cmake
+        }
+      }
+
+      autoload -Uz restore_dlls && restore_dlls
+      ;;
+  }
+}
+

deps.ffmpeg/patches/libdatachannel/0001-Fix-mbedtls-cmake-objdump.patch

@@ -0,0 +1,16 @@
+diff --git a/cmake/Modules/FindMbedTLS.cmake b/cmake/Modules/FindMbedTLS.cmake
+index f7b5618..0b11208 100644
+--- a/cmake/Modules/FindMbedTLS.cmake
++++ b/cmake/Modules/FindMbedTLS.cmake
+@@ -84,7 +84,7 @@ macro(MbedTLS_set_soname component)
+     endif()
+   elseif(CMAKE_HOST_SYSTEM_NAME MATCHES "Linux|FreeBSD")
+     execute_process(
+-      COMMAND sh -c "objdump -p '${Mbed${component}_LIBRARY}' | grep SONAME"
++      COMMAND sh -c "${CMAKE_OBJDUMP}  -p '${Mbed${component}_LIBRARY}' | grep SONAME"
+       OUTPUT_VARIABLE _output
+       RESULT_VARIABLE _result)
+
+-- 
+2.39.1.windows.1
+