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Use CMake to build the ffmpeg audio extension

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PiperOrigin-RevId: 322793308
This commit is contained in:
aquilescanta 2020-07-23 16:41:10 +01:00 committed by Oliver Woodman
parent 9a51681332
commit 19602ca4ca
6 changed files with 49 additions and 72 deletions
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12
extensions/ffmpeg/README.md
View file

@ -18,8 +18,8 @@ its modules locally. Instructions for doing this can be found in ExoPlayer's
[top level README][]. The extension is not provided via JCenter (see [#2781][]
for more information).
In addition, it's necessary to build the extension's native components as
follows:
In addition, it's necessary to manually build the FFmpeg library, so that gradle
can bundle the FFmpeg binaries in the APK:
* Set the following shell variable:
@ -73,14 +73,6 @@ cd "${FFMPEG_EXT_PATH}/jni" && \
"${FFMPEG_EXT_PATH}" "${NDK_PATH}" "${HOST_PLATFORM}" "${ENABLED_DECODERS[@]}"
```
* Build the JNI native libraries, setting `APP_ABI` to include the architectures
built in the previous step. For example:
```
cd "${FFMPEG_EXT_PATH}/jni" && \
${NDK_PATH}/ndk-build APP_ABI="armeabi-v7a arm64-v8a x86 x86_64" -j4
```
## Build instructions (Windows) ##
We do not provide support for building this extension on Windows, however it

9
extensions/ffmpeg/build.gradle
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@ -15,11 +15,18 @@ apply from: "$gradle.ext.exoplayerSettingsDir/common_library_config.gradle"
android {
sourceSets.main {
// The directory from which to pick the ffmpeg binaries.
jniLibs.srcDir 'src/main/libs'
jni.srcDirs = [] // Disable the automatic ndk-build call by Android Studio.
}
}
// Configure the native build only if ffmpeg is present to avoid gradle sync
// failures if ffmpeg hasn't been built according to the README instructions.
if (project.file('src/main/jni/ffmpeg').exists()) {
android.externalNativeBuild.cmake.path = 'src/main/jni/CMakeLists.txt'
android.externalNativeBuild.cmake.version = '3.7.1+'
}
dependencies {
implementation project(modulePrefix + 'library-core')
implementation 'androidx.annotation:annotation:' + androidxAnnotationVersion

2
extensions/ffmpeg/src/main/java/com/google/android/exoplayer2/ext/ffmpeg/FfmpegLibrary.java
View file

@ -35,7 +35,7 @@ public final class FfmpegLibrary {
private static final String TAG = "FfmpegLibrary";
private static final LibraryLoader LOADER =
new LibraryLoader("avutil", "swresample", "avcodec", "ffmpeg");
new LibraryLoader("avutil", "swresample", "avcodec", "ffmpeg_jni");
private static @MonotonicNonNull String version;
private static int inputBufferPaddingSize = C.LENGTH_UNSET;

40
extensions/ffmpeg/src/main/jni/Android.mk
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@ -1,40 +0,0 @@
#
# Copyright (C) 2016 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := libavcodec
LOCAL_SRC_FILES := ffmpeg/android-libs/$(TARGET_ARCH_ABI)/$(LOCAL_MODULE).so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libswresample
LOCAL_SRC_FILES := ffmpeg/android-libs/$(TARGET_ARCH_ABI)/$(LOCAL_MODULE).so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libavutil
LOCAL_SRC_FILES := ffmpeg/android-libs/$(TARGET_ARCH_ABI)/$(LOCAL_MODULE).so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := ffmpeg
LOCAL_SRC_FILES := ffmpeg_jni.cc
LOCAL_C_INCLUDES := ffmpeg
LOCAL_SHARED_LIBRARIES := libavcodec libswresample libavutil
LOCAL_LDLIBS := -Lffmpeg/android-libs/$(TARGET_ARCH_ABI) -llog
include $(BUILD_SHARED_LIBRARY)

20
extensions/ffmpeg/src/main/jni/Application.mk
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@ -1,20 +0,0 @@
#
# Copyright (C) 2016 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
APP_OPTIM := release
APP_STL := c++_static
APP_CPPFLAGS := -frtti
APP_PLATFORM := android-9

38
extensions/ffmpeg/src/main/jni/CMakeLists.txt Normal file
View file

@ -0,0 +1,38 @@
cmake_minimum_required(VERSION 3.7.1 FATAL_ERROR)
# Enable C++11 features.
set(CMAKE_CXX_STANDARD 11)
project(libffmpeg_jni C CXX)
set(ffmpeg_location "${CMAKE_CURRENT_SOURCE_DIR}/ffmpeg")
set(ffmpeg_binaries "${ffmpeg_location}/android-libs/${ANDROID_ABI}")
set(ffmpeg_output_dir "${CMAKE_CURRENT_SOURCE_DIR}/../libs/${ANDROID_ABI}")
foreach(ffmpeg_lib avutil swresample avcodec)
set(ffmpeg_lib_filename lib${ffmpeg_lib}.so)
set(ffmpeg_lib_file_path ${ffmpeg_binaries}/${ffmpeg_lib_filename})
add_library(
${ffmpeg_lib}
SHARED
IMPORTED)
set_target_properties(
${ffmpeg_lib} PROPERTIES
IMPORTED_LOCATION
${ffmpeg_lib_file_path})
file(COPY ${ffmpeg_lib_file_path} DESTINATION ${ffmpeg_output_dir})
endforeach()
include_directories(${ffmpeg_location})
find_library(android_log_lib log)
add_library(ffmpeg_jni
SHARED
ffmpeg_jni.cc)
target_link_libraries(ffmpeg_jni
PRIVATE android
PRIVATE avutil
PRIVATE swresample
PRIVATE avcodec
PRIVATE ${android_log_lib})