Add webrtc support for snap

snap/snapcraft.yaml

@@ -24,6 +24,7 @@ apps:
       - alsa
       - audio-playback
       - audio-record
+      - camera
       - desktop
       - desktop-legacy
       - home
@@ -102,6 +103,7 @@ parts:
       - -DTDESKTOP_API_HASH=d524b414d21f4d37f08684c1df41ac9c
       - -DDESKTOP_APP_USE_PACKAGED_LAZY=ON
       - -DDESKTOP_APP_QTWAYLANDCLIENT_PRIVATE_HEADERS=$SNAPCRAFT_STAGE/usr/include/$SNAPCRAFT_ARCH_TRIPLET/qt5/QtWaylandClient/5.12.8
+      - -DDESKTOP_APP_WEBRTC_LOCATION=$SNAPCRAFT_STAGE/webrtc/src
     override-pull: |
       snapcraftctl pull
 
@@ -123,10 +125,29 @@ parts:
       - ffmpeg
       - openal
       - qtwayland
+      - webrtc
 
   patches:
+    source: https://github.com/desktop-app/patches.git
+    source-depth: 1
     plugin: dump
+    organize:
+      "*": patches/
+    prime: [-./*]
+
+  telegram-patches:
     source: Telegram/Patches
+    plugin: dump
+    organize:
+      "*": telegram_patches/
+    prime: [-./*]
+
+  depot-tools:
+    source: https://chromium.googlesource.com/chromium/tools/depot_tools.git
+    source-depth: 1
+    plugin: dump
+    organize:
+      "*": depot_tools/
     prime: [-./*]
 
   desktop-qt5:
@@ -303,12 +324,12 @@ parts:
       - --enable-muxer=opus
     override-pull: |
       snapcraftctl pull
-      patch -p1 < "$SNAPCRAFT_STAGE/ffmpeg.diff"
+      patch -p1 < "$SNAPCRAFT_STAGE/telegram_patches/ffmpeg.diff"
     prime:
       - -./usr/include
       - -./usr/lib/pkgconfig
     after:
-      - patches
+      - telegram-patches
       - dav1d
 
   openal:
@@ -351,3 +372,73 @@ parts:
       - desktop-qt5
     stage: [-./usr/lib]
     prime: [-./*]
+
+  webrtc:
+    plugin: nil
+    build-packages:
+      - libopus-dev
+      - libssl-dev
+    stage-packages:
+      - libopus0
+      - libssl1.1
+    override-pull: |
+      export PATH="$SNAPCRAFT_STAGE/depot_tools:$PATH"
+
+      mkdir webrtc
+      cd webrtc
+      cp "$SNAPCRAFT_STAGE/patches/webrtc/.gclient" .
+      git clone --depth=1 https://github.com/open-webrtc-toolkit/owt-deps-webrtc src
+      gclient sync --no-history
+
+      applyPatch() {
+        cd "$SNAPCRAFT_PART_SRC/webrtc/$1"
+        git apply "$SNAPCRAFT_STAGE/patches/webrtc/$(basename $1).diff"
+      }
+
+      applyPatch src
+      applyPatch src/build
+      applyPatch src/third_party
+      applyPatch src/third_party/libsrtp
+    override-build: |
+      export PATH="$SNAPCRAFT_STAGE/depot_tools:$PATH"
+
+      cd webrtc/src
+
+      ArgumentsList=`echo \
+          target_os=\"linux\" \
+          treat_warnings_as_errors=false \
+          is_component_build=false \
+          is_debug=false \
+          is_clang=false \
+          proprietary_codecs=true \
+          use_custom_libcxx=false \
+          use_rtti=true \
+          use_gold=false \
+          use_sysroot=false \
+          linux_use_bundled_binutils=false \
+          enable_dsyms=true \
+          rtc_include_tests=false \
+          rtc_build_examples=false \
+          rtc_build_tools=false \
+          rtc_build_opus=false \
+          rtc_build_ssl=false \
+          rtc_ssl_root=\"/usr/include\" \
+          rtc_ssl_libs=[\"ssl\",\"crypto\"] \
+          rtc_builtin_ssl_root_certificates=true \
+          rtc_build_ffmpeg=false \
+          rtc_ffmpeg_root=\"$SNAPCRAFT_STAGE/usr/include\" \
+          rtc_ffmpeg_libs=[\"avcodec\",\"swscale\",\"swresample\",\"avutil\"] \
+          rtc_opus_root=\"/usr/include/opus\" \
+          rtc_enable_protobuf=false`
+
+      gn gen out/Release --args="$ArgumentsList"
+
+      ninja -C out/Release webrtc
+      cd ../..
+
+      cp -a webrtc "$SNAPCRAFT_PART_INSTALL"
+    after:
+      - depot-tools
+      - ffmpeg
+      - patches
+    prime: [-./*]