Add support for x86_64 for the ffmpeg extension

Requested by https://github.com/google/ExoPlayer/issues/7058.
Additionally move one of the common option in COMMON_OPTIONS.

PiperOrigin-RevId: 299862479

RELEASENOTES.md

@@ -96,6 +96,7 @@
 *   Metadata: Add minimal DVB Application Information Table (AIT) support
     ([#6922](https://github.com/google/ExoPlayer/pull/6922)).
 *   The demo app startup selected item is the last played one.
+*   Add support for x86_64 for the ffmpeg extension.
 
 ### 2.11.3 (2020-02-19) ###
 

extensions/ffmpeg/src/main/jni/build_ffmpeg.sh

@@ -34,6 +34,7 @@ COMMON_OPTIONS="
     --disable-symver
     --disable-avresample
     --enable-swresample
+    --extra-ldexeflags=-pie
     "
 TOOLCHAIN_PREFIX="${NDK_PATH}/toolchains/llvm/prebuilt/${HOST_PLATFORM}/bin"
 for decoder in "${ENABLED_DECODERS[@]}"
@@ -53,7 +54,6 @@ git checkout release/4.2
     --strip="${TOOLCHAIN_PREFIX}/arm-linux-androideabi-strip" \
     --extra-cflags="-march=armv7-a -mfloat-abi=softfp" \
     --extra-ldflags="-Wl,--fix-cortex-a8" \
-    --extra-ldexeflags=-pie \
     ${COMMON_OPTIONS}
 make -j4
 make install-libs
@@ -65,7 +65,6 @@ make clean
     --cross-prefix="${TOOLCHAIN_PREFIX}/aarch64-linux-android21-" \
     --nm="${TOOLCHAIN_PREFIX}/aarch64-linux-android-nm" \
     --strip="${TOOLCHAIN_PREFIX}/aarch64-linux-android-strip" \
-    --extra-ldexeflags=-pie \
     ${COMMON_OPTIONS}
 make -j4
 make install-libs
@@ -77,7 +76,18 @@ make clean
     --cross-prefix="${TOOLCHAIN_PREFIX}/i686-linux-android16-" \
     --nm="${TOOLCHAIN_PREFIX}/i686-linux-android-nm" \
     --strip="${TOOLCHAIN_PREFIX}/i686-linux-android-strip" \
-    --extra-ldexeflags=-pie \
+    --disable-asm \
+    ${COMMON_OPTIONS}
+make -j4
+make install-libs
+make clean
+./configure \
+    --libdir=android-libs/x86_64 \
+    --arch=x86_64 \
+    --cpu=x86_64 \
+    --cross-prefix="${TOOLCHAIN_PREFIX}/x86_64-linux-android16-" \
+    --nm="${TOOLCHAIN_PREFIX}/x86_64-linux-android-nm" \
+    --strip="${TOOLCHAIN_PREFIX}/x86_64-linux-android-strip" \
     --disable-asm \
     ${COMMON_OPTIONS}
 make -j4