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build.gradle に android.ndkVersion を追記
libsrt に patchelf の説明を追記
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‎dConnectDevicePlugin/dConnectDeviceUVC/libuvccamera/build.gradle‎

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@@ -2,6 +2,7 @@ apply plugin: 'com.android.library'
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android {
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compileSdkVersion 29
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ndkVersion "21.0.6113669"
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defaultConfig {
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minSdkVersion 21

‎dConnectSDK/dConnectLibStreaming/libopus/build.gradle‎

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android {
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compileSdkVersion 29
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ndkVersion "21.0.6113669"
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defaultConfig {
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minSdkVersion 21

‎dConnectSDK/dConnectLibStreaming/libsrt/README.md‎

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@@ -284,6 +284,133 @@ unzip がインストールされていない場合には以下のコマンド
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$ sudo apt install unzip
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```
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### patchelf のビルド
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Android OS 5.0 以前では、ライブラリの soname とそのパスの違いを認識できません。<br>
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soname を変更するのに、patchelf を使用します。
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下記のサイトからソースコードをダウンロードします。<br>
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[http://nixos.org/releases/patchelf/](http://nixos.org/releases/patchelf/)
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最新版があれば、そちらをダウンロードしてください。<br>
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```
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$ wget http://nixos.org/releases/patchelf/patchelf-0.10/patchelf-0.10.tar.bz2
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$ tar xfa patchelf-0.10.tar.bz2
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```
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カレントディレクトリを移動して、configure を実行し Makefile を作成します。
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```sh
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$ cd patchelf-0.10
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$ ./configure --prefix=/usr/local
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checking for a BSD-compatible install... /usr/bin/install -c
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checking whether build environment is sane... yes
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checking for a thread-safe mkdir -p... /bin/mkdir -p
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checking for gawk... gawk
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checking whether make sets $(MAKE)... yes
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checking whether make supports nested variables... yes
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checking whether make supports the include directive... yes (GNU style)
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checking for gcc... gcc
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checking whether the C compiler works... yes
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checking for C compiler default output file name... a.out
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checking for suffix of executables...
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checking whether we are cross compiling... no
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checking for suffix of object files... o
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checking whether we are using the GNU C compiler... yes
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checking whether gcc accepts -g... yes
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checking for gcc option to accept ISO C89... none needed
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checking whether gcc understands -c and -o together... yes
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checking dependency style of gcc... gcc3
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checking for g++... g++
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checking whether we are using the GNU C++ compiler... yes
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checking whether g++ accepts -g... yes
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checking dependency style of g++... gcc3
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Setting page size to 4096
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checking that generated files are newer than configure... done
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configure: creating ./config.status
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config.status: creating Makefile
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config.status: creating src/Makefile
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config.status: creating tests/Makefile
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config.status: creating patchelf.spec
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config.status: executing depfiles commands
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```
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make を実行して、patchelf をビルドします。
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```sh
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$ make
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Making all in src
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make[1]: Entering directory '/home/vagrant/workspace/patchelf-0.10/src'
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g++ -DPACKAGE_NAME=\"patchelf\" -DPACKAGE_TARNAME=\"patchelf\" -DPACKAGE_VERSION=\"0.10\" -DPACKAGE_STRING=\"patchelf\ 0.10\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"patchelf\" -DVERSION=\"0.10\" -DPAGESIZE=4096 -I. -Wall -std=c++11 -D_FILE_OFFSET_BITS=64 -g -O2 -MT patchelf.o -MD -MP -MF .deps/patchelf.Tpo -c -o patchelf.o patchelf.cc
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mv -f .deps/patchelf.Tpo .deps/patchelf.Po
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g++ -Wall -std=c++11 -D_FILE_OFFSET_BITS=64 -g -O2 -o patchelf patchelf.o
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make[1]: Leaving directory '/home/vagrant/workspace/patchelf-0.10/src'
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Making all in tests
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make[1]: Entering directory '/home/vagrant/workspace/patchelf-0.10/tests'
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make[1]: Nothing to be done for 'all'.
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make[1]: Leaving directory '/home/vagrant/workspace/patchelf-0.10/tests'
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make[1]: Entering directory '/home/vagrant/workspace/patchelf-0.10'
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make[1]: Nothing to be done for 'all-am'.
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make[1]: Leaving directory '/home/vagrant/workspace/patchelf-0.10'
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```
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ルート権限で、ビルドした patchelf をインストールします。
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```sh
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$ sudo make install
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Making install in src
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make[1]: Entering directory '/home/vagrant/workspace/patchelf-0.10/src'
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make[2]: Entering directory '/home/vagrant/workspace/patchelf-0.10/src'
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/bin/mkdir -p '/usr/local/bin'
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/usr/bin/install -c patchelf '/usr/local/bin'
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make[2]: Nothing to be done for 'install-data-am'.
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make[2]: Leaving directory '/home/vagrant/workspace/patchelf-0.10/src'
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make[1]: Leaving directory '/home/vagrant/workspace/patchelf-0.10/src'
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Making install in tests
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make[1]: Entering directory '/home/vagrant/workspace/patchelf-0.10/tests'
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make[2]: Entering directory '/home/vagrant/workspace/patchelf-0.10/tests'
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make[2]: Nothing to be done for 'install-exec-am'.
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make[2]: Nothing to be done for 'install-data-am'.
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make[2]: Leaving directory '/home/vagrant/workspace/patchelf-0.10/tests'
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make[1]: Leaving directory '/home/vagrant/workspace/patchelf-0.10/tests'
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make[1]: Entering directory '/home/vagrant/workspace/patchelf-0.10'
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make[2]: Entering directory '/home/vagrant/workspace/patchelf-0.10'
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make[2]: Nothing to be done for 'install-exec-am'.
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/bin/mkdir -p '/usr/local/share/doc/patchelf'
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/usr/bin/install -c -m 644 README '/usr/local/share/doc/patchelf'
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/bin/mkdir -p '/usr/local/share/man/man1'
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/usr/bin/install -c -m 644 patchelf.1 '/usr/local/share/man/man1'
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make[2]: Leaving directory '/home/vagrant/workspace/patchelf-0.10'
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make[1]: Leaving directory '/home/vagrant/workspace/patchelf-0.10'
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```
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patchelf を実行して、インストールされていることを確認します。
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```sh
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$ /usr/local/bin/patchelf
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syntax: /usr/local/bin/patchelf
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[--set-interpreter FILENAME]
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[--page-size SIZE]
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[--print-interpreter]
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[--print-soname] Prints 'DT_SONAME' entry of .dynamic section. Raises an error if DT_SONAME doesn't exist
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[--set-soname SONAME] Sets 'DT_SONAME' entry to SONAME.
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[--set-rpath RPATH]
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[--remove-rpath]
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[--shrink-rpath]
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[--allowed-rpath-prefixes PREFIXES] With '--shrink-rpath', reject rpath entries not starting with the allowed prefix
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[--print-rpath]
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[--force-rpath]
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[--add-needed LIBRARY]
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[--remove-needed LIBRARY]
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[--replace-needed LIBRARY NEW_LIBRARY]
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[--print-needed]
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[--no-default-lib]
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[--debug]
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[--version]
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FILENAME
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```
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### SRT のビルド
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SRT は、下記のサイトに公開されています。<br>
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```
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$ ./packjni
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/vagrant_data/srt/docs/Android/jniLibs/armeabi-v7a/libsrt.so: file format elf32-little
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SONAME libsrt.so
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/vagrant_data/srt/docs/Android/jniLibs/arm64-v8a/libsrt.so: file format elf64-little
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SONAME libsrt.so
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/vagrant_data/srt/docs/Android/jniLibs/x86/libsrt.so: file format elf32-i386
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SONAME libsrt.so
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/vagrant_data/srt/docs/Android/jniLibs/x86_64/libsrt.so: file format elf64-x86-64
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SONAME libsrt.so
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```
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コマンドの実行に成功すると jniLibs というファイルが作成されます。

‎dConnectSDK/dConnectLibStreaming/libsrt/build.gradle‎

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android {
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compileSdkVersion 29
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ndkVersion "21.0.6113669"
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defaultConfig {
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minSdkVersion 21

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