FFMPEG+OPENSLES+生产者模式播放音视频（一）

先讲一下编译FFMPEG及其配置

1. 下载：wget http://ffmpeg.org/releases/ffmpeg-2.6.9.tar.gz
2. 解压缩： tar -xzf ffmpeg-2.6.9.tar.gz
3. 赋予权限：chmod 777 -R ffmpeg-2.6.9
4. 修改configure文件中的2775行开始的4行代码
   改之前：

   SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
   LIB_INSTALL_EXTRA_CMD='$$(RANLIB)"$(LIBDIR)/$(LIBNAME)"'
   SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
   SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR)$(SLIBNAME)'
   

   改之后：

   SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
   LIB_INSTALL_EXTRA_CMD='$$(RANLIB)"$(LIBDIR)/$(LIBNAME)"'
   SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
   SLIB_INSTALL_LINKS='$(SLIBNAME)'
   

5. 编写build_android.sh

   #!/bin/bash
   make clean
   export NDK=/ndk/android-ndk-r15
   export SYSROOT=$NDK/platforms/android-9/arch-arm/
   export TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64
   export CPU=arm
   export PREFIX=$(pwd)/android/$CPU
   export ADDI_CFLAGS="-marm"
   
   ./configure --target-os=linux \
   --prefix=$PREFIX --arch=arm \
   --disable-doc \
   --enable-shared \
   --disable-static \
   --disable-yasm \
   --disable-symver \
   --enable-gpl \
   --disable-ffmpeg \
   --disable-ffplay \
   --disable-ffprobe \
   --disable-ffserver \
   --disable-doc \
   --disable-symver \
   --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
   --enable-cross-compile \
   --sysroot=$SYSROOT \
   --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
   --extra-ldflags="$ADDI_LDFLAGS" \
   $ADDITIONAL_CONFIGURE_FLAG
   make clean
   make
   make install
   

6. 赋予权限：chmod 777 build_android.sh
7. 运行:./build_android.sh
8. 新建android studio工程，将生成的android/arm/lib中的8个so文件，拷贝到libs\armeabi:

   libavcodec-56.so
   libavdevice-56.so
   libavformat-56.so
   libavutil-54.so
   libpostproc-53.so
   libswresample-1.so
   libswscale-3.so
   

9. 在moudle 下的defaultConfig节点加入下面代码

   sourceSets {
       main {
           jniLibs.srcDirs = ['libs']
       }
   }
   externalNativeBuild {
       cmake {
           cppFlags "-frtti -fexceptions"
           abiFilters 'armeabi'
       }
   }
   

10. 将生成的android/arm/include整个文件夹，拷贝到as工程中的libs文件夹里面。
11. 修改CMakeLists.txt文件：

cmake_minimum_required(VERSION 3.4.1)
add_library( native-lib
             SHARED
             src/main/cpp/native-lib.cpp )
find_library( log-lib
              log )
include_directories(libs/include)
set(DIR ../../../../libs)
add_library(avcodec-56
            SHARED
            IMPORTED)
set_target_properties(avcodec-56
                      PROPERTIES IMPORTED_LOCATION
                      ${DIR}/armeabi/libavcodec-56.so)
add_library(avdevice-56
            SHARED
            IMPORTED)
set_target_properties(avdevice-56
                      PROPERTIES IMPORTED_LOCATION
                      ${DIR}/armeabi/libavdevice-56.so)
add_library(avformat-56
            SHARED
            IMPORTED)
set_target_properties(avformat-56
                      PROPERTIES IMPORTED_LOCATION
                      ${DIR}/armeabi/libavformat-56.so)
add_library(avutil-54
            SHARED
            IMPORTED)
set_target_properties(avutil-54
                      PROPERTIES IMPORTED_LOCATION
                      ${DIR}/armeabi/libavutil-54.so)
add_library(postproc-53
            SHARED
            IMPORTED)
set_target_properties(postproc-53
                      PROPERTIES IMPORTED_LOCATION
                      ${DIR}/armeabi/libpostproc-53.so)
add_library(swresample-1
            SHARED
            IMPORTED)
set_target_properties(swresample-1
                      PROPERTIES IMPORTED_LOCATION
                      ${DIR}/armeabi/libswresample-1.so)
add_library(swscale-3
            SHARED
            IMPORTED)
set_target_properties(swscale-3
                      PROPERTIES IMPORTED_LOCATION
                      ${DIR}/armeabi/libswscale-3.so)
add_library(avfilter-5
            SHARED
            IMPORTED)
set_target_properties(avfilter-5
                      PROPERTIES IMPORTED_LOCATION
                      ${DIR}/armeabi/libavfilter-5.so)
target_link_libraries( native-lib
                       avcodec-56
                       avdevice-56
                       avformat-56
                       avutil-54
                       postproc-53
                       swresample-1
                       swscale-3
                       avfilter-5
                       ${log-lib} )

12.编译运行，如没出错，则说明编译配置正确

项目地址:FFmpegDemo