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4. 完成IPlayerProxy代理模式并进行测试架构搭建完成~1

发布时间：2021-06-13 10:56:52编辑：雪饮阅读（）

 要完成代理模式，這裏先要在cpp/CMakeLists.txt中引入代理模式的程序和頭文件，假定為IPlayerPorxy，則：

# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html

# Sets the minimum version of CMake required to build the native library.

cmake_minimum_required(VERSION 3.10.2)

# Declares and names the project.

project("xplay")

# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.
#添加頭文件路徑(括號中的include是相對於本文件路徑)
include_directories(../../../include)
#設置ffmpeg庫所在路徑的變量，這裏的FF是自定義的一個名字
set(FF ${CMAKE_CURRENT_SOURCE_DIR}/../../../libs/${ANDROID_ABI})
#avcodec這個是自定義的一個名字
add_library(avcodec SHARED IMPORTED)
set_target_properties(avcodec PROPERTIES IMPORTED_LOCATION ${FF}/libavcodec.so)

add_library(avformat SHARED IMPORTED)
set_target_properties(avformat PROPERTIES IMPORTED_LOCATION ${FF}/libavformat.so)

add_library(avutil SHARED IMPORTED)
set_target_properties(avutil PROPERTIES IMPORTED_LOCATION ${FF}/libavutil.so)

add_library(swscale SHARED IMPORTED)
set_target_properties(swscale PROPERTIES IMPORTED_LOCATION ${FF}/libswscale.so)

add_library(swresample SHARED IMPORTED)
set_target_properties(swresample PROPERTIES IMPORTED_LOCATION ${FF}/libswresample.so)
add_library( # Sets the name of the library.
             native-lib

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
            #src/main/cpp/native-lib.cpp
            IDemux
            FFDemux
            XData
            XLog
            native-lib.cpp
            XThread
            IObserver
            FFDecode
            IDecode
            XParameter
            IVideoView
            GLVideoView
            XTexture
            XEGL
            XShader
            FFResample
            IResample
            SLAudioPlay
            IAudioPlay
            IPlayer
            IPlayerBuilder
            FFPlayerBuilder
            IPlayerPorxy
        )

# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.

find_library( # Sets the name of the path variable.
              log-lib

              # Specifies the name of the NDK library that
              # you want CMake to locate.
              log )

# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.

target_link_libraries( # Specifies the target library.
                       native-lib
                       GLESv2 EGL
                       OpenSLES
                       android
                       avcodec avformat avutil swscale swresample
                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )
在cpp/IPlayerPorxy.h中實現該代理模式的聲明：

#ifndef XPLAY_IPLAYERPORXY_H
#define XPLAY_IPLAYERPORXY_H


#include "IPlayer.h"
#include <mutex>
class IPlayerPorxy: public IPlayer
{
public:
    static IPlayerPorxy*Get()
    {
        static IPlayerPorxy px;
        return &px;
    }
    void Init(void *vm = 0);

    virtual bool Open(const char *path);
    virtual bool Start();
    virtual void InitView(void *win);

protected:
    IPlayerPorxy(){}
    IPlayer *player = 0;
    std::mutex mux;
};


#endif //XPLAY_IPLAYERPORXY_H

在cpp/IPlayerPorxy.cpp中完成代理模式的具體邏輯： #include "IPlayerPorxy.h"
#include "FFPlayerBuilder.h"

void IPlayerPorxy::Init(void *vm)
{
    mux.lock();
    if(vm)
    {
        FFPlayerBuilder::InitHard(vm);
    }
    if(!player)
        player = FFPlayerBuilder::Get()->BuilderPlayer();

    mux.unlock();
}
bool IPlayerPorxy::Open(const char *path)
{
    bool re = false;
    mux.lock();
    if(player)
        re = player->Open(path);
    mux.unlock();
    return re;
}
bool IPlayerPorxy::Start()
{
    bool re = false;
    mux.lock();
    if(player)
        re = player->Start();
    mux.unlock();
    return re;
}
void IPlayerPorxy::InitView(void *win)
{
    mux.lock();
    if(player)
        player->InitView(win);
    mux.unlock();
}

這次也就這些内容了，沒有什麽難的，沒有太多理論的東西，都是代碼結構調整優化而已。

沒有報錯誤就是最好的成功