《Ndk中使用Mediacode解码》
《android mediacodec 编码demo(java)》
《NDK中使用mediacodec编码h264》
《Android native 层使用opengl渲染YUV420p和NV12》
《android 使用NativeWindow渲染RGB视频》
《opengl 叠加显示文字》
《android studio 编译freeType》
《最原始的yuv图像叠加文字的实现--手动操作像素》
利用opengl进行yuv的渲染，主要原理利用显卡的加速运算，是把YUV转换成 RGBA ,然后交给gl渲染， 即opengl最终需要的数据还是 RGBA, 我们可以采用cpu软件计算的方式把 yuv转成rgb,这样计算量大，占用CPU，所以一般用opengl 利用显卡运算，把我我们的yuv数据转成RGBA.
所以这里的工作，主要在于 怎么把 yuv 利用显卡运算转换为 RGBA。
YUV420p（ plane 平面格式）:
YV12: y0y1y2y3y4y5y6y7 v0v1 u0u1 先平铺完y,再平铺完v,在平铺完u
YU12:y0y1y2y3y4y5y6y7 u0u1 v0v1 先平铺完y,再平铺完u,在平铺完v 这个 也叫做I420
YUV420sp( 平面+交叉)
NV12: y0y1y2y3y4y5y6y7 v0u0 v1u1 先平铺完y,再交叉存储 u和v
NV21: y0y1y2y3y4y5y6y7 u0v0 u1v1 先平铺完y,再交叉存储 v和u
以YUV420p YU12来举例，这计算的原理，主要是准备三个纹理， 将Y U V三个分量分别存储到一个纹理上去，然后在opengl的显卡执行程序中，将这三个分量取出进行一次矩阵运算，这个运算及时 yuv转rgb的矩阵公式，得到rgba，再显示。这里有一个注意的地方， 纹理的GLenum format
这个值有几种选择： 在gl2.h中有宏定义：
#define GL_ALPHA 0x1906
#define GL_RGB 0x1907
#define GL_RGBA 0x1908
#define GL_LUMINANCE 0x1909
#define GL_LUMINANCE_ALPHA 0x190A
在网络上搜罗了一圈，总结一下：
/*
The difference between the three single-component texture formats, GL_ALPHA, GL_LUMINANCE and GL_INTENSITY, is in the way the four-component RGBA color vector is generated. If the value for a given texel is X, then the RGBA color vector generated is:
* GL_ALPHA: RGBA = (0, 0, 0, X0)
* GL_LUMINANCE: RGBA = (X0, X0, X0, 1)
* GL_INTENSITY: RGBA = (X0, X0, X0, X0)
* GL_LUMINANCE_ALPHA: RGBA = (X0, X0, X0, X1), 这个才是二维交叉的
* GL_RGB : RGBA=(X0, X1, X2, 1),三个量交叉
* GL_RGBA : RGBA=(X0, X1, X2, X3),四个量交叉
这里用的 GL_LUMINANCE,每一纹理分量 r g b 是一样的值,都是纹理设定的数据
其实我们可以改用GL_LUMINANCE_ALPHA, 只需要一个量
*/
对于YUV420p的格式中的yuv分量，我们直接选用GL_LUMINANCE GL_ALPHA GL_INTENSITY 都可以，平铺格式。 而对于NV12 这种交叉存储的数据，就需要选用GL_LUMINANCE_ALPHA， 利用其中的任意一个 r g b分量和alph分量，可以得到 二维交叉的数据，即uv两个交叉存储。
（摘自某一个博主文章https://blog.csdn.net/u012861978/article/details/97117321）
输入参数介绍:
1.着色器程序(Shader Program，图中没有画出):由 main 申明的一段程序源码或可执行文件，描述在顶点上执行的操作：如坐标变换、计算光照公式产生每个顶点颜色、计算纹理坐标。
2.属性(Attribute):由 vertext array 提供的顶点数据，如空间位置，法向量，纹理坐标以及顶点颜色，属性可以理解为针对每一个顶点的输入数据。属性只在顶点着色器中才有，片元着色器中没有属性。
3.统一值（Uniforms）: Uniforms保存由应用程序传递给着色器的只读常量数据。在顶点着色器中，这些数据通常是变换矩阵，光照参数，颜色等。由 uniform 修饰符修饰的变量属于全局变量，该全局性对顶点着色器与片元着色器均可见，也就是说，这两个着色器如果被连接到同一个应用程序中，它们共享同一份 uniform 全局变量集。因此如果在这两个着色器中都声明了同名的 uniform 变量，要保证这对同名变量完全相同：同名+同类型，因为它们实际是同一个变量。
4.采样器（Samplers）: 一种特殊的 uniform，用于呈现纹理。sampler 可用于顶点着色器和片元着色器。
输出参数介绍:
1.可变变量(Varying):varying 变量用于存储顶点着色器的输出数据，也存储片元着色器的输入数据。varying 变量会在光栅化处理阶段被线性插值。顶点着色器如果声明了 varying 变量，它必须被传递到片元着色器中才能进一步传递到下一阶段，因此顶点着色器中声明的 varying 变量都应在片元着色器中重新声明为同名同类型的 varying 变量。（所以我们程序里在顶点着色器和片段着色器（片段或片元，叫法不同）中有同一个变量：varying vec2 vTextCoord， 是同一份变量，在顶点着色器中获取纹理输入，在片段着色器中用来计算rgb颜色。）
gl_Position:在顶点着色器阶段至少应输出位置信息-即内建变量
gl_FrontFacing:为back-face culling stage阶段生成的变量，无论精选是否被禁用，该变量都会生成。
gl_PointSize:点大小。
不明白它为什么叫顶点“着色器”，不是叫顶点生成器更好？毕竟它和颜色没什么关系，只是确定点的坐标
这里的顶点着色器，1. 没做什么运算，只是单纯原样将我们输入的数据复制到固定变量：gl_Position ，2. 将纹理坐标上下翻转了下（纹理坐标系 SW和计算机图像坐标系 XY，y轴方向刚好相反）
const char *vertexShader_ = GET_STR(
attribute vec4 aPosition;//输入的顶点坐标，会在程序指定将数据输入到该字段
attribute vec2 aTextCoord;//输入的纹理坐标，会在程序指定将数据输入到该字段
varying vec2 vTextCoord;//输出的纹理坐标
void main() {
//这里其实是将上下翻转过来
vTextCoord = vec2(aTextCoord.x, 1.0 - aTextCoord.y);
//直接把传入的坐标值作为传入渲染管线。gl_Position是OpenGL内置的
gl_Position = aPosition;
}
);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); 一个三角形扇以第一个中心顶点作为起始，使用相邻的第三三个顶点连接起来创建第一个三角形， 接着以第二个顶点作为中心起点，第三四个顶点连接起来创建三角形，依次类推。
这里使用的顶点数据是：
static float ver[] = {
1.0f, -1.0f, 0.0f,
-1.0f, -1.0f, 0.0f,
1.0f, 1.0f, 0.0f,
-1.0f, 1.0f, 0.0f
};
对应绘制如下图，由两个三角形组成这个矩形区域。 三角形ABC + 三角形BCD 
这里的片段着色器程序的主要工作，就是 取纹理里面的yuv数据，然后进行一个矩阵运算转换为RGBA数据，这就是每一个片段最终的颜色数据，赋值给固定的变量：gl_FragColor
const char *fragNV12_ = GET_STR(
precision mediump float;
varying vec2 vTextCoord;
uniform sampler2D yTexture;
uniform sampler2D uvTexture;
void main(void)
{
vec3 yuv;
vec3 rgb;
yuv.x = texture2D(yTexture, vTextCoord.st).r;
yuv.y = texture2D(uvTexture, vTextCoord.st).r - 0.5;
yuv.z = texture2D(uvTexture, vTextCoord.st).a - 0.5;
rgb = mat3( 1, 1, 1,
0, -0.39465, 2.03211,
1.13983, -0.58060, 0) * yuv;
gl_FragColor = vec4(rgb, 1.0);
}
);
文件jni_NativeOpengl.cpp
//canok 20210528
//jni_NativeOpengl.cpp 主要实现jni转换
#include <assert.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include"Openglfuncs.h"
#include "GlPragrame.h"
#include "logs.h"
static char* jstringToChar(JNIEnv* env, jstring jstr) {
char* rtn = NULL;
jclass clsstring = env->FindClass("java/lang/String");
//LOGD("fine String class------clsstring==NULL?%d",clsstring==NULL);
jstring strencode = env->NewStringUTF("utf-8");
jmethodID mid = env->GetMethodID(clsstring, "getBytes", "(Ljava/lang/String;)[B");
jbyteArray barr = (jbyteArray) env->CallObjectMethod(jstr, mid, strencode);
jsize alen = env->GetArrayLength(barr);
jbyte* ba = env->GetByteArrayElements(barr, JNI_FALSE);
if (alen > 0) {
rtn = (char*) malloc(alen + 1);
memcpy(rtn, ba, alen);
rtn[alen] = 0;
}
env->ReleaseByteArrayElements(barr, ba, 0);
return rtn;
}
void jStart(JNIEnv *env, jobject obj,jobject jsurface, jstring srcfile, int type, jint w, jint h, int fps){
ANativeWindow *pWind= ANativeWindow_fromSurface(env, jsurface);
char*file_in = jstringToChar(env,srcfile);
//内部会开启另一个线程，并在新线程中初始化EGL环境，然后在新线程中渲染
//注意，EGL初的始化的，一定要和渲染 为同一个线程 里面有个调用 eglMakeCurrent 。
//如果把EGL的初始化也封装成了 jni借口由java的线程来调用，就不要在这里面单独再开启线程渲染，可以直接使用java的线程体来 执行渲染循环。
mygl_start(pWind,file_in,type,w,h,fps);
}
void jStop(JNIEnv *env, jobject obj){
mygl_stop();
}
static JNINativeMethod gMethods[] = {
{"native_start", "(Landroid/view/Surface;Ljava/lang/String;IIII)V", (void*)jStart},
{"native_stop", "()V", (void*)jStop},
};
static const char* const kClassPathName = "com/example/opengl_native/NativeOpengl";
static int registerNativeMethods(JNIEnv* env
, const char* className
, JNINativeMethod* gMethods, int numMethods) {
jclass clazz;
clazz = env->FindClass(className);
if (clazz == NULL) {
return JNI_FALSE;
}
if (env->RegisterNatives(clazz, gMethods, numMethods) < 0) {
return JNI_FALSE;
}
return JNI_TRUE;
}
// This function only registers the native methods
static int registerFunctios(JNIEnv *env)
{
ALOGD("register [%s]%d",__FUNCTION__,__LINE__);
return registerNativeMethods(env,
kClassPathName, gMethods, sizeof(gMethods)/sizeof(gMethods[0]));
}
jint JNI_OnLoad(JavaVM* vm, void* reserved)
{
ALOGD("onloader");
JNIEnv* env = NULL;
jint result = -1;
if (vm->GetEnv((void**) &env, JNI_VERSION_1_4) != JNI_OK) {
ALOGD("ERROR: GetEnv failed\n");
goto bail;
}
assert(env != NULL);
if (registerFunctios(env) < 0) {
ALOGE(" onloader ERROR: MediaPlayer native registration failed\n");
goto bail;
}
ALOGD("onloader register ok ![%s]%d",__FUNCTION__,__LINE__);
result = JNI_VERSION_1_4;
bail:
return result;
}
文件Openglfuncs.cpp
//canok 20210528
//文件openglfuncs.cpp 主要初始化egl环境，读文件进行渲染
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include "logs.h"
#include "GlPragrame.h"
#include "Openglfuncs.h"
#define MIN(x,y) (x)<(y)?(x):(y)
#define DEBUG_FROME_FILE 1
EGLDisplay megldisplay =NULL;
EGLSurface meglSurface =NULL;
EGLContext meglContext=NULL;
int mbRun=0;
void initGles(){
// 1 EGL 初始化
EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if(display == EGL_NO_DISPLAY){
ALOGE("eglGetDisplay failed %d", eglGetError());
return;
}
megldisplay = display;
if(!eglInitialize(display,NULL,NULL)){
ALOGE("eglInitialize failed %d", eglGetError());
}
//2配置display
EGLConfig config;
EGLint configNum;
EGLint configSpec[] = {
EGL_RED_SIZE,8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE,8,
EGL_RENDERABLE_TYPE,EGL_OPENGL_ES2_BIT,
EGL_SURFACE_TYPE,EGL_WINDOW_BIT,EGL_NONE
};
if(EGL_TRUE != eglChooseConfig(display, configSpec, &config, 1, &configNum)){
ALOGD("eglChooseConfig failed!");
return;
}
//3 EGLcontext 创建上下文
const EGLint ctxAttr[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,EGL_NONE
};
EGLContext context = eglCreateContext(display, config, EGL_NO_CONTEXT, ctxAttr);
if(context == EGL_NO_CONTEXT){
ALOGD("eglCreateContext failed!");
return;
}
meglContext=context;
//4创建EGLsurface,把 java端传入的surface和EGL关联起来
EGLSurface eglsurface = eglCreateWindowSurface(display, config, global_Context.nwin, 0);
if(eglsurface == EGL_NO_SURFACE){
ALOGD("eglCreateWindowSurface failed!");
return;
}
meglSurface=eglsurface;
if(EGL_TRUE != eglMakeCurrent(display, eglsurface, eglsurface, context)){
ALOGD("eglMakeCurrent failed！");
return ;
}
glClearColor(0.0f,0.0f,0.0f,1.0f);
glClear(GL_COLOR_BUFFER_BIT);
eglSwapBuffers(megldisplay, meglSurface);
}
void *renderthread(void * prame){
#if DEBUG_FROME_FILE
//第一步搭建ES环境
initGles();
ALOGD("mygl_init intglescontext ok ");
//第二步 创建显卡可执行程序
createprograme();
ALOGD("mygl_init createprograme ok %d",global_Context.type);
//waring!!!!!!!!
//glViewport(0,0,WIDTH,HEIGHT);
FILE *fp = fopen(global_Context.file_in,"r");
if(fp ==NULL){
ALOGD("fopen failed!");
return NULL;
}
global_Context.buflen=global_Context.mW*global_Context.mH*3/2;
global_Context.buf = (unsigned char*)malloc( global_Context.buflen);
int ret =0;
while(mbRun){
//这里绘制
if( (ret = fread(global_Context.buf,1,global_Context.buflen,fp)) ==global_Context.buflen ){
drawFrame(global_Context.buf,global_Context.buflen);
eglSwapBuffers(megldisplay, meglSurface);
usleep(1000*1000/global_Context.mfps);
}else{//循环播放
fseek(fp,0,SEEK_SET);
}
}
//销毁
if(megldisplay!=NULL && meglSurface!=NULL && meglContext!=NULL){
eglDestroySurface(megldisplay,meglSurface);
eglDestroyContext(megldisplay,meglContext);
}
fclose(fp);
free(global_Context.file_in);
free(global_Context.buf);
#else
initGles();
ALOGD(" intglescontext ok ");
createprograme();
ALOGD(" createprograme ok ");
global_Context.buflen=global_Context.mW*global_Context.mH*3/2;
global_Context.buf = (unsigned char*)malloc( global_Context.buflen);
if(global_Context.buf == NULL){
ALOGE("err to malloc!");
return NULL;
}
while(mbRun){
//条件等待
pthread_mutex_lock(&global_Context.mCondMutex);
pthread_cond_wait(&global_Context.mCond,&global_Context.mCondMutex);
pthread_mutex_unlock(&global_Context.mCondMutex);
pthread_mutex_lock(&global_Context.bufMutex);
do {//渲染，期间不允许同时修改
drawFrame(global_Context.buf, global_Context.buflen);
eglSwapBuffers(megldisplay, meglSurface);
}while(0);
pthread_mutex_unlock(&global_Context.bufMutex);
}
//销毁
if(megldisplay!=NULL && meglSurface!=NULL && meglContext!=NULL){
eglDestroySurface(megldisplay,meglSurface);
eglDestroyContext(megldisplay,meglContext);
}
free(global_Context.buf);
#endif
pthread_exit(NULL);
return NULL;
}
void mygl_start(ANativeWindow *pWnid, char*file_in,int type, int w, int h,int fps){
global_Context.file_in = file_in;
global_Context.type = type;
global_Context.nwin = pWnid;
global_Context.mW = w;
global_Context.mH = h;
global_Context.mfps =fps;
ALOGD("start run");
//创建渲染程序：
if(mbRun){
ALOGE("had run, return");
}
mbRun =true;
int ret =0;
if(0 != (ret = pthread_create(&global_Context.mThread,NULL,renderthread,NULL))){
ALOGE("pthread_create erro");
}
//pthread_detach(pd);
}
void mygl_render(unsigned char *buf,int size){
pthread_mutex_lock(&global_Context.bufMutex);
do {//拷贝，期间不允许同时修改
memcpy(global_Context.buf,buf,MIN(size,global_Context.buflen));
}while(0);
pthread_mutex_unlock(&global_Context.bufMutex);
//释放条件
pthread_mutex_lock(&global_Context.mCondMutex);
pthread_cond_signal(&global_Context.mCond);
pthread_mutex_unlock(&global_Context.mCondMutex);
}
void mygl_stop(){
mbRun = false;
//释放条件
pthread_mutex_lock(&global_Context.mCondMutex);
pthread_cond_signal(&global_Context.mCond);
pthread_mutex_unlock(&global_Context.mCondMutex);
//等待结束，避免出现 FORTIFY: pthread_mutex_lock called on a destroyed mutex
pthread_join(global_Context.mThread,NULL);
}
文件GlPragrame.cpp
//canok 20210528
//GlPragrame.cpp 主要实现 gl程序
//canok 2021.0528
#include <stdlib.h>
#include "GlPragrame.h"
#include "Openglfuncs.h"
#include "logs.h"
#define GET_STR(x) #x
struct S_CONTEXT global_Context = {.bufMutex=PTHREAD_MUTEX_INITIALIZER,.mCondMutex=PTHREAD_MUTEX_INITIALIZER,
.mCond=PTHREAD_COND_INITIALIZER};
const char *vertexShader_ = GET_STR(
attribute vec4 aPosition;//输入的顶点坐标，会在程序指定将数据输入到该字段
attribute vec2 aTextCoord;//输入的纹理坐标，会在程序指定将数据输入到该字段
varying vec2 vTextCoord;//输出的纹理坐标
void main() {
//这里其实是将上下翻转过来
vTextCoord = vec2(aTextCoord.x, 1.0 - aTextCoord.y);
//直接把传入的坐标值作为传入渲染管线。gl_Position是OpenGL内置的
gl_Position = aPosition;
}
);
/*
The difference between the three single-component texture formats, GL_ALPHA, GL_LUMINANCE and GL_INTENSITY, is in the way the four-component RGBA color vector is generated. If the value for a given texel is X, then the RGBA color vector generated is:
* GL_ALPHA: RGBA = (0, 0, 0, X0)
* GL_LUMINANCE: RGBA = (X0, X0, X0, 1)
* GL_INTENSITY: RGBA = (X0, X0, X0, X0)
* GL_LUMINANCE_ALPHA: RGBA = (X0, X0, X0, X1), 这个才是二维交叉的
* GL_RGB : RGBA=(X0, X1, X2, 1),三个量交叉
* GL_RGBA : RGBA=(X0, X1, X2, X3),四个量交叉
这里用的 GL_LUMINANCE,每一纹理分量 r g b 是一样的值,都是纹理设定的数据
其实我们可以改用GL_LUMINANCE_ALPHA, 只需要一个量
这里整个的原理，即把YUV420S 每一个分量当做一个纹理，然后在片原着色器中
利用显卡的高速运算，通过 yuv转rgb 的矩阵公式，把三个纹理分量的值计算转换成rgb
接着，然后画这个rgba 的点。
*/
const char *fragYUV420P_ = GET_STR(
precision mediump float;
varying vec2 vTextCoord;
//输入的yuv三个纹理
uniform sampler2D yTexture;//采样器
uniform sampler2D uTexture;//采样器
uniform sampler2D vTexture;//采样器
void main() {
vec3 yuv;
vec3 rgb;
//分别取yuv各个分量的采样纹理
//下面是一个 yuv转 rgb的矩阵运算
// 纹理的 r g b相等，都是一个值
/*
*矩阵公式
*【】x [[yuv] -[0,0.5,0.5]]
*/
yuv.x = texture2D(yTexture, vTextCoord).r;
yuv.y = texture2D(uTexture, vTextCoord).r - 0.5;
yuv.z = texture2D(vTexture, vTextCoord).r - 0.5;
rgb = mat3(
1.0, 1.0, 1.0,
0.0, -0.39465, 2.03211,
1.13983, -0.5806, 0.0
) * yuv;
//gl_FragColor是OpenGL内置的
gl_FragColor = vec4(rgb, 1.0);
}
);
const char *fragNV12_ = GET_STR(
precision mediump float;
varying vec2 vTextCoord;
uniform sampler2D yTexture;
uniform sampler2D uvTexture;
void main(void)
{
vec3 yuv;
vec3 rgb;
yuv.x = texture2D(yTexture, vTextCoord.st).r;
yuv.y = texture2D(uvTexture, vTextCoord.st).r - 0.5;
yuv.z = texture2D(uvTexture, vTextCoord.st).a - 0.5;
rgb = mat3( 1, 1, 1,
0, -0.39465, 2.03211,
1.13983, -0.58060, 0) * yuv;
gl_FragColor = vec4(rgb, 1.0);
}
);
/**
* 加载 着色器
* @param type 着色器类型
* @param shaderSrc 着色源码
* @return
*/
GLuint LoadShader(GLenum type, const char *shaderSrc) {
GLuint shader;
GLint compiled;
shader = glCreateShader(type); // 创建 着色器 句柄
if (shader == 0) {
ALOGE("create shader error");
return 0;
}
// 装载 着色器源码
glShaderSource(shader, 1, &shaderSrc, 0);
// 编译着色器
glCompileShader(shader);
// 检测编译状态
glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
if (!compiled) {
GLint infoLen = 0;
// 获取日志长度
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
if (infoLen > 1) {
GLchar *infoLog = (GLchar *)(malloc(sizeof(GLchar) * infoLen));
// 获取日志 信息
glGetShaderInfoLog(shader, infoLen, 0, infoLog);
ALOGE("%s", infoLog);
free(infoLog);
}
glDeleteShader(shader);
return 0;
}
return shader;
}
GLuint LoadProgramYUV(int type){
GLint vertexShader = LoadShader(GL_VERTEX_SHADER,vertexShader_);
GLint fragShader;
if(TYPE_YUV420SP_NV12 == type){
fragShader = LoadShader(GL_FRAGMENT_SHADER,fragNV12_);
}else{
//默认用yuv420p
fragShader = LoadShader(GL_FRAGMENT_SHADER,fragYUV420P_);
}
// 创建渲染程序
GLint program = glCreateProgram();
if (program == 0){
ALOGE("YUV : CreateProgram failure");
glDeleteShader(vertexShader);
glDeleteShader(fragShader);
return 0;
}
// 先渲染程序中 加入着色器
glAttachShader(program,vertexShader);
glAttachShader(program,fragShader);
// 链接 程序
glLinkProgram(program);
GLint status = 0;
glGetProgramiv(program,GL_LINK_STATUS,&status);
if (status == 0){
ALOGE("glLinkProgram failure");
glDeleteProgram(program);
return 0;
}
global_Context.glProgram = program;
glUseProgram(program);
return 1;
}
void RenderYUVConfig(uint width, uint height, int type) {
static float ver[] = {
1.0f, -1.0f, 0.0f,
-1.0f, -1.0f, 0.0f,
1.0f, 1.0f, 0.0f,
-1.0f, 1.0f, 0.0f
};
GLuint apos = (GLuint)(glGetAttribLocation(global_Context.glProgram, "aPosition"));
glEnableVertexAttribArray(apos);
glVertexAttribPointer(apos, 3, GL_FLOAT, GL_FALSE, 0, ver);
//加入纹理坐标数据
static float fragment[] = {
1.0f, 0.0f,
0.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f
};
GLuint aTex = (GLuint)(glGetAttribLocation(global_Context.glProgram, "aTextCoord"));
glEnableVertexAttribArray(aTex);
glVertexAttribPointer(aTex, 2, GL_FLOAT, GL_FALSE, 0, fragment);
ALOGD("can_ok[%s%d] type:%d",__FUNCTION__,__LINE__,type);
if(TYPE_YUV420SP_NV12 == type){
ALOGD("can_ok[%s%d] type:%d",__FUNCTION__,__LINE__,type);
glUniform1i(glGetUniformLocation(global_Context.glProgram, "yTexture"), 0);
glUniform1i(glGetUniformLocation(global_Context.glProgram, "uvTexture"), 1);
glGenTextures(2, global_Context.mTextures);
glBindTexture(GL_TEXTURE_2D, global_Context.mTextures[0]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D,
0,
GL_LUMINANCE,
width,
height,
0,
GL_LUMINANCE,
GL_UNSIGNED_BYTE,
NULL
);
glBindTexture(GL_TEXTURE_2D, global_Context.mTextures[1]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D,
0,
GL_LUMINANCE_ALPHA,
width / 2,
height / 2,
0,
GL_LUMINANCE_ALPHA,
GL_UNSIGNED_BYTE,
NULL
);
}else{
glUniform1i(glGetUniformLocation(global_Context.glProgram, "yTexture"), 0);
glUniform1i(glGetUniformLocation(global_Context.glProgram, "uTexture"), 1);
glUniform1i(glGetUniformLocation(global_Context.glProgram, "vTexture"), 2);
glGenTextures(3, global_Context.mTextures);
glBindTexture(GL_TEXTURE_2D, global_Context.mTextures[0]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D,
0,
GL_LUMINANCE,
width,
height,
0,
GL_LUMINANCE,
GL_UNSIGNED_BYTE,
NULL
);
glBindTexture(GL_TEXTURE_2D, global_Context.mTextures[1]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D,
0,
GL_LUMINANCE,
width / 2,
height / 2,
0,
GL_LUMINANCE,
GL_UNSIGNED_BYTE,
NULL
);
glBindTexture(GL_TEXTURE_2D, global_Context.mTextures[2]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D,
0,
GL_LUMINANCE,
width / 2,
height / 2,
0,
GL_LUMINANCE,
GL_UNSIGNED_BYTE,
NULL
);
}
}
//平面格式
void RenderYUV420P(GLuint width, GLuint height, unsigned char *buf) {
//Y
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, global_Context.mTextures[0]);
glTexSubImage2D(GL_TEXTURE_2D, 0,
0, 0,
width, height,
GL_LUMINANCE, GL_UNSIGNED_BYTE,
buf);
//U
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, global_Context.mTextures[1]);
glTexSubImage2D(GL_TEXTURE_2D, 0,
0, 0,
width / 2, height / 2,
GL_LUMINANCE, GL_UNSIGNED_BYTE,
buf+width*height);
//V
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, global_Context.mTextures[2]);
glTexSubImage2D(GL_TEXTURE_2D, 0,
0, 0,
width / 2, height / 2,
GL_LUMINANCE,
GL_UNSIGNED_BYTE,
buf+width*height*5/4);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
//eglSwapBuffers(global_Context.eglDisplay, global_Context.eglSurface);
}
void RenderNV12(GLuint width, GLuint height, unsigned char * buf){
//Y
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, global_Context.mTextures[0]);
glTexSubImage2D(GL_TEXTURE_2D, 0,
0, 0,
width, height,
GL_LUMINANCE,
GL_UNSIGNED_BYTE,
buf);
//UV
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, global_Context.mTextures[1]);
glTexSubImage2D(GL_TEXTURE_2D, 0,
0, 0,
width/2, height / 2,
GL_LUMINANCE_ALPHA,
GL_UNSIGNED_BYTE,
buf+width*height);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}
void createprograme(){
LoadProgramYUV(global_Context.type);
RenderYUVConfig(global_Context.mW,global_Context.mH,global_Context.type);
}
void drawFrame(unsigned char* buf, int size) {
if(global_Context.type == TYPE_YUV420SP_NV12){
ALOGD("[%s%d] render NV12 %dx%d",__FUNCTION__,__LINE__,global_Context.mW,global_Context.mH);
RenderNV12(global_Context.mW,global_Context.mH,buf);
}else{
ALOGD("[%s%d]render YUV420P %dx%d",__FUNCTION__,__LINE__,global_Context.mW,global_Context.mH);
RenderYUV420P(global_Context.mW,global_Context.mH,buf);
}
}
void changeLayout(int width, int height){
glViewport(0,0,width,height);
}
//canok 20210528
//头文件：
logs.h
#ifndef __MY_LOGS_HEADER__
#define __MY_LOGS_HEADER__
#ifdef __cplusplus
extern "C" {
#endif
#include <android/log.h>
// 宏定义类似java 层的定义,不同级别的Log LOGI, LOGD, LOGW, LOGE, LOGF。 对就Java中的 Log.i log.d
#define LOG_TAG "hpc -- JNILOG" // 这个是自定义的LOG的标识
//#undef LOG // 取消默认的LOG
#define ALOGI(...) __android_log_print(ANDROID_LOG_INFO,LOG_TAG, __VA_ARGS__)
#define ALOGD(...) __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG, __VA_ARGS__)
#define ALOGW(...) __android_log_print(ANDROID_LOG_WARN,LOG_TAG, __VA_ARGS__)
#define ALOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG, __VA_ARGS__)
#define ALOGF(...) __android_log_print(ANDROID_LOG_FATAL,LOG_TAG, __VA_ARGS__)
#ifdef __cplusplus
}
#endif
#endif
OpenGLfuncs.h
#ifndef __OPENGLFUNCS_HH
#define __OPENGLFUNCS_HH
#include<jni.h>
#include<android/native_window.h>
#include<android/native_window_jni.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include<EGL/egl.h>
#include<EGL/eglext.h>
#define TYPE_YUV420P 19
#define TYPE_YUV420SP_NV12 21
void mygl_start(ANativeWindow *pWnid,char*file_in, int type,int w, int h,int fps);
void mygl_stop();
//下面函数供其它模块输入渲染数据
void mygl_render(unsigned char *buf,int size);
#endif
Glprograme.h
#ifndef __GLPRAGRAME2__H__
#define __GLPRAGRAME2__H__
#include <jni.h>
#include<EGL/egl.h>
#include<EGL/eglext.h>
#include <android/log.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <pthread.h>
#include <unistd.h>
struct S_CONTEXT{
GLint glProgram;
GLuint mTextures[3];
int mW;
int mH;
int type;
int mfps;
ANativeWindow *nwin ;
unsigned char* buf;
int buflen;
pthread_mutex_t bufMutex;
pthread_mutex_t mCondMutex;
pthread_cond_t mCond;
pthread_t mThread;
char *file_in;
} ;
extern struct S_CONTEXT global_Context;
void createprograme();
void drawFrame(unsigned char* buf, int size) ;
#endif
添加上java 代码：
package com.example.opengl_native;
import android.util.Log;
import android.view.Surface;
public class NativeOpengl {
private static final String TAG = "NativeOpengl";
private Surface mSurface;
NativeOpengl(){
}
private native void native_start(Surface surface,String file_in,int type,int w, int h, int fps);
private native void native_stop();
static {
System.loadLibrary("NativeOpengl");
}
public void play(Surface surface,String file_in,int type,int w, int h,int fps){
String colortype="unsupport_type";
if(type ==21){
colortype = "NV12_YUV420SP";
}else if(type==19){
colortype = "YUV420P";
}
Log.d(TAG, "play: "+surface+"file_in:"+file_in+" type,"+colortype+",size:"+w+"x"+h+"@"+fps);
mSurface = surface;
native_start(surface,file_in,type,w,h,fps);
}
}
package com.example.opengl_native;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import android.Manifest;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private Button mButtonPlay;
private SurfaceView mView;
private NativeOpengl mOpengl;
private Surface mSurface;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
verifyStoragePermissions(this);
mView = findViewById(R.id.surface);
SurfaceHolder holder = mView.getHolder();
holder.addCallback(new SurfaceHolder.Callback() {
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
Log.i("SURFACE","destroyed");
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
Log.i("SURFACE","create");
mSurface = holder.getSurface();
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
}
});
mButtonPlay = findViewById(R.id.button);
mButtonPlay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mSurface!=null && mOpengl==null) {
mOpengl = new NativeOpengl();
mOpengl.play(mSurface,"/storage/emulated/0/960X544_nv12.yuv",21,960,544,30);
}
}
});
}
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE};
public static boolean verifyStoragePermissions(Activity activity) {
if(Build.VERSION.SDK_INT < 23)
{
Log.d(TAG, "verifyStoragePermissions: <23");
return true;
}
// Check if we have write permission
int permission = ActivityCompat.checkSelfPermission(activity,
Manifest.permission.RECORD_AUDIO);
if (permission != PackageManager.PERMISSION_GRANTED) {
// We don't have permission so prompt the user
ActivityCompat.requestPermissions(activity,PERMISSIONS_STORAGE,
REQUEST_EXTERNAL_STORAGE);
return false;
}
else
{
return true;
}
}
}Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := NativeOpengl
LOCAL_SRC_FILES := Openglfuncs.cpp \
GlPragrame.cpp \
jni_NativeOpengl.cpp
LOCAL_LDLIBS += -lGLESv2 -lEGL \
-llog -landroid
LOCAL_CFLAGS += -DGL_GLEXT_PROTOTYPES
include $(BUILD_SHARED_LIBRARY)
布局：
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:layout_editor_absoluteX="73dp"
tools:layout_editor_absoluteY="168dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
tools:layout_editor_absoluteX="73dp">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="播放" />
</LinearLayout>
<SurfaceView
android:id="@+id/surface"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
清单文件：
package="com.example.opengl_native">
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:requestLegacyExternalStorage="true"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.Opengl_native">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>