NDK学习笔记(十三) 使用AVILib+opengl es 2.0创建一个AVI视频播放器

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demo地址

https://gitee.com/xd_box/AviPlayer

直接上代码

1.java代码

public class OpenGLPlayerActivity extends AbstractPlayerActivity {private final AtomicBoolean isPlaying = new AtomicBoolean();private long instance;private GLSurfaceView glSurfaceView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_open_g_l_player);glSurfaceView = findViewById(R.id.glSurfaceView);glSurfaceView.setEGLContextClientVersion(2);glSurfaceView.setRenderer(renderer);//请求时渲染帧glSurfaceView.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);}@Overrideprotected void onStart() {super.onStart();instance = init(avi);}@Overrideprotected void onResume() {super.onResume();glSurfaceView.onResume();}@Overrideprotected void onPause() {super.onPause();glSurfaceView.onPause();}@Overrideprotected void onStop() {super.onStop();free(instance);}private final Runnable player = new Runnable() {@Overridepublic void run() {long frameDelay = (long) (1000 / getFrameRate(avi));while (isPlaying.get()) {glSurfaceView.requestRender();try {Thread.sleep(frameDelay);} catch (InterruptedException e) {break;}}}};private final GLSurfaceView.Renderer renderer = new GLSurfaceView.Renderer() {@Overridepublic void onSurfaceCreated(GL10 gl, EGLConfig config) {initSurface(instance, avi);isPlaying.set(true);new Thread(player).start();}@Overridepublic void onSurfaceChanged(GL10 gl, int width, int height) {}@Overridepublic void onDrawFrame(GL10 gl) {if (!render(instance, avi)) {isPlaying.set(false);}}};/*** 初始化渲染器** @param avi* @return*/private native static long init(long avi);/*** 初始化opengl surface** @param instance* @param avi*/private native static void initSurface(long instance, long avi);/*** 用给定文件读取帧渲染** @param instance* @param avi* @return*/private native static boolean render(long instance, long avi);/*** 释放原生渲染器** @param instance*/private native static void free(long instance);}

2.配置cmake GLESv2

find_library(GLESv2-libGLESv2)target_link_libraries( # Specifies the target library.native-lib# Links the target library to the log library# included in the NDK.${jnigraphics-lib}#开启jnigraphics${log-lib}${GLESv2-lib}avi-lib)

3.原生代码

extern "C" {
#include "avilib/avilib.h"
}#include "cn_study_aviplayer_OpenGLPlayerActivity.h"
#include "Common.h"
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <malloc.h>#define POSITION_COMPONENT_COUNT 2
#define BYTES_PER_FLOAT 4
#define TEXTURE_COORDINATES_COMPONENT_COUNT 2
#define STRIDE ((POSITION_COMPONENT_COUNT + TEXTURE_COORDINATES_COMPONENT_COUNT)*BYTES_PER_FLOAT)GLuint LoadShader(GLenum type, const char *shaderSrc);static GLuint gProgramObject;struct Instance {char *buffer;GLuint texture;Instance() : buffer(0), texture(0) {}
};char vShaderStr[] = "attribute vec4 a_Position;           \n""attribute vec2 a_TextureCoordinates;               \n""varying vec2 v_TextureCoordinates;                 \n""void main()                                        \n""{                                                  \n""    v_TextureCoordinates = a_TextureCoordinates;   \n""    gl_Position = a_Position;                      \n""}                                                  \n";char fShaderStr[] ="precision mediump float; \n""uniform sampler2D u_TextureUnit;                   \n""varying vec2 v_TextureCoordinates;                 \n""void main()                                        \n""{                                                  \n""    gl_FragColor = texture2D(u_TextureUnit, v_TextureCoordinates);  \n""}                                                  \n";extern "C"
JNIEXPORT jlong JNICALL
Java_cn_study_aviplayer_OpenGLPlayerActivity_init(JNIEnv *env, jclass clazz, jlong avi) {Instance *instance = 0;long frameSize = AVI_frame_size((avi_t *) avi, 0);if (0 >= frameSize) {ThrowException(env, "java/io/RuntimeException", "没有获取到帧大小");goto exit;}instance = new Instance();instance->buffer = (char *) malloc(frameSize);if (0 == instance->buffer) {ThrowException(env, "java/io/RuntimeException", "申请内存失败");delete instance;instance = 0;}exit:return (jlong) instance;
}extern "C"
JNIEXPORT void JNICALL
Java_cn_study_aviplayer_OpenGLPlayerActivity_initSurface(JNIEnv *env, jclass clazz, jlong inst,jlong avi) {Instance *instance = (Instance *) inst;GLuint vertexShader;GLuint fragmentShader;GLuint programObject;GLint linked;vertexShader = LoadShader(GL_VERTEX_SHADER, vShaderStr);fragmentShader = LoadShader(GL_FRAGMENT_SHADER, fShaderStr);programObject = glCreateProgram();if (programObject == 0) {return;}//附着色器glAttachShader(programObject, vertexShader);glAttachShader(programObject, fragmentShader);// 连接programglLinkProgram(programObject);// 检查链接状态glGetProgramiv(programObject, GL_LINK_STATUS, &linked);if (!linked) {GLint infoLen = 0;//日志长度glGetProgramiv(programObject, GL_INFO_LOG_LENGTH, &infoLen);if (infoLen > 1) {char *infoLog = (char *) malloc(sizeof(char) * infoLen);glGetProgramInfoLog(programObject, infoLen, NULL, infoLog);
//            esLogMessage("Error linking program:\n%s\n", infoLog);free(infoLog);}glDeleteProgram(programObject);return;}// 全局gProgramObject = programObject;glClearColor(1.0f, 1.0f, 1.0f, 0.0f);//生成一个纹理对象glGenTextures(1, &instance->texture);//绑定到生成的纹理上glBindTexture(GL_TEXTURE_2D, instance->texture);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}extern "C"
JNIEXPORT jboolean JNICALL
Java_cn_study_aviplayer_OpenGLPlayerActivity_render(JNIEnv *env, jclass clazz, jlong inst,jlong avi) {Instance *instance = (Instance *) inst;jboolean isFrameRead = JNI_FALSE;GLint uTextureUnitLocation;GLint aPositionLocation;GLint aTextureCoordinatesLocation;GLfloat VERTEX_DATA[] = {0.0f, 0.0f, 0.5f, 0.5f, -1.0f, -1.0f, 0.0f, 1.0f,1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, -1.0f, 1.0f, 0.0f,0.0f, -1.0f, -1.0f, 0.0f, 1.0f};int x, y;int vWidth, vHeight;float scale = 1.8;int keyFrame = 0;long frameSize = AVI_read_frame((avi_t *) avi, instance->buffer, &keyFrame);if (0 >= frameSize) {goto exit;}isFrameRead = JNI_TRUE;vWidth = AVI_video_width((avi_t *) avi) * scale;vHeight = AVI_video_height((avi_t *) avi) * scale;x = (1080 - vWidth) / 2;y = 1920 / 2 - vHeight / 2;//设置视频位置及大小glViewport(x, y, vWidth, vHeight);glClear(GL_COLOR_BUFFER_BIT);glUseProgram(gProgramObject);glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, AVI_video_width((avi_t *) avi),AVI_video_height((avi_t *) avi), 0, GL_RGB,GL_UNSIGNED_SHORT_5_6_5, instance->buffer);//    uTextureUnitLocation = glGetUniformLocation(gProgramObject, "u_TextureUnit");
//    setUniforms(uTextureUnitLocation, instance->texture);//返回属性变量aPositionLocation = glGetAttribLocation(gProgramObject, "a_Position");aTextureCoordinatesLocation = glGetAttribLocation(gProgramObject, "a_TextureCoordinates");//定义通用顶点属性数据数组glVertexAttribPointer((GLuint) aPositionLocation, POSITION_COMPONENT_COUNT, GL_FLOAT,0, STRIDE, VERTEX_DATA);//启用或禁用通用顶点属性数组glEnableVertexAttribArray((GLuint) aPositionLocation);glVertexAttribPointer((GLuint) aTextureCoordinatesLocation, POSITION_COMPONENT_COUNT,GL_FLOAT, 0, STRIDE, &VERTEX_DATA[POSITION_COMPONENT_COUNT]);glEnableVertexAttribArray((GLuint) aTextureCoordinatesLocation);glDrawArrays(GL_TRIANGLE_FAN, 0, 6);exit:return isFrameRead;
}extern "C"
JNIEXPORT void JNICALL
Java_cn_study_aviplayer_OpenGLPlayerActivity_free(JNIEnv *env, jclass clazz, jlong inst) {Instance *instance = (Instance *) inst;if (0 != instance) {free(instance->buffer);delete instance;}
}/*** 装载着色器* @param type* @param shaderSrc* @return*/
GLuint LoadShader(GLenum type, const char *shaderSrc) {GLuint shader;GLint compiled;// Create the shader objectshader = glCreateShader(type);if (shader == 0) {return 0;}// Load the shader sourceglShaderSource(shader, 1, &shaderSrc, NULL);// Compile the shaderglCompileShader(shader);// Check the compile statusglGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);if (!compiled) {GLint infoLen = 0;glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);if (infoLen > 1) {char *infoLog = (char *) malloc(sizeof(char) * infoLen);glGetShaderInfoLog(shader, infoLen, NULL, infoLog);
//            esLogMessage("Error compiling shader:\n%s\n", infoLog);free(infoLog);}glDeleteShader(shader);return 0;}return shader;}

4.实现效果

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