上一篇文章视频播放器的技术组成写了视频播放器的整体结构

下面我们就来上伪代码：

#include <iostream>
#include <thread>
#include <list>
#include <string>
using namespace std;//下文代码都需要考虑并发，并发代码没写是为了清晰思路
typedef void* handle_t;struct h264_package
{int data_length = 0;//1个音频包，或者视频包的字节数
};struct yuv_package 
{
};//从mp4文件里读到的数据
list<h264_package> h264_package_list;
//解码h264得到的yuv数据
list<yuv_package> yuv_package_list;handle_t read_mp4_file(string file_name) {}
//从头到尾，依次读取视频帧，音频帧
h264_package read_from_mp4_by_ffmpeg(handle_t handle)
{return h264_package();
}
yuv_package decode_h264_by_ffmpeg(h264_package package)
{return yuv_package();
}
void opengl_rander_yuv(yuv_package package)
{
}void read_file_thread_fun(void* handle)
{h264_package package;while (true){package = read_from_mp4_by_ffmpeg(handle);if (package.data_length == 0){break;//读取mp4文件结束}h264_package_list.push_back(package);//这里需要考虑并发}
}
void decode_h264_thread_fun(void)
{while (true){if (!h264_package_list.empty()){h264_package package;auto package = h264_package_list.front();h264_package_list.pop_front();auto yuv = decode_h264_by_ffmpeg(package);yuv_package_list.push_back(yuv);}}
}
void rendering_thread_fun(void)
{while (true){if (!yuv_package_list.empty()){auto package = yuv_package_list.front();yuv_package_list.pop_front();//把数据通过OpenGL接口传递给显卡，使用显卡将yuv数据转换为RGB数据渲染到显卡输出// ，显卡输出连接显示器显示opengl_rander_yuv(package);}}
}
int main(void)
{auto handle = read_mp4_file("av.mp4");thread read_frame_thread(read_file_thread_fun, handle);thread decode_h246_thread(decode_h264_thread_fun);thread rendering_thread(rendering_thread_fun);rendering_thread.join();decode_h246_thread.join();read_frame_thread.join();return 0;
}

仅供参考，后面的教程我们来让它变成真实的播放器。

敬请期待！