用jni實現基於opengl的yuv格式的視訊渲染
阿新 • • 發佈：2019-01-06
由於專案需要，需要在android上面實現視訊流的解碼顯示，綜合考慮決定使用ffmpeg解碼，opengl渲染視訊。
技術選型確定以後，開始寫demo，不做不知道，一做才發現網上的東西太不靠譜了，基於jni實現的opengl不是直接渲染yuv格式的資料，都是yuv轉rgb以後在顯示的，有實現的資料都是在java層做的，我不是java出生，所以對那個不感冒，綜合考慮之後決定自己通過jni來實現，由於以前基於webrtc開發了一款產品，用的是webrtc的c++介面開發（現在的webrtc都基於瀏覽器開發了，更加成熟了，介面也更加簡單，^_^我覺得還是挖c++程式碼出來自己實現介面層有意思，我那個專案就是這樣搞的），廢話不多說，開始講述實現步驟。
注意：android2.3.3版本才開始支援opengl。
寫jni的時候需要在Android.mk裡面加上opengl的庫連線，這裡我發一個我的Android.mk出來供大家參考一下：
上面紅色的是opengl的庫，我是mac電腦上面編譯的，其他系統的不知道是不是叫這個名字哈（不過這麼弱智的應該不會變哈）.LOCAL_PATH := $(call my-dir) MY_LIBS_PATH := /Users/chenjianjun/Documents/work/ffmpeg-android/build/lib MY_INCLUDE_PATH := /Users/chenjianjun/Documents/work/ffmpeg-android/build/include include $(CLEAR_VARS) LOCAL_MODULE := libavcodec LOCAL_SRC_FILES := $(MY_LIBS_PATH)/libavcodec.a include $(PREBUILT_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := libavfilter LOCAL_SRC_FILES := $(MY_LIBS_PATH)/libavfilter.a include $(PREBUILT_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := libavformat LOCAL_SRC_FILES := $(MY_LIBS_PATH)/libavformat.a include $(PREBUILT_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := libavresample LOCAL_SRC_FILES := $(MY_LIBS_PATH)/libavresample.a include $(PREBUILT_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := libavutil LOCAL_SRC_FILES := $(MY_LIBS_PATH)/libavutil.a include $(PREBUILT_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := libpostproc LOCAL_SRC_FILES := $(MY_LIBS_PATH)/libpostproc.a include $(PREBUILT_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := libswresample LOCAL_SRC_FILES := $(MY_LIBS_PATH)/libswresample.a include $(PREBUILT_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := libswscale LOCAL_SRC_FILES := $(MY_LIBS_PATH)/libswscale.a include $(PREBUILT_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE_TAGS := MICloudPub LOCAL_MODULE := libMICloudPub LOCAL_SRC_FILES := H264Decoder.cpp \ #我的H264基於ffmpeg的解碼介面程式碼 render_opengles20.cpp \ #opengl的渲染程式碼 test.cpp #測試介面程式碼 LOCAL_CFLAGS := LOCAL_C_INCLUDES := $(MY_INCLUDE_PATH) LOCAL_CPP_INCLUDES := $(MY_INCLUDE_PATH) LOCAL_LDLIBS := \ -llog \ -lgcc \ <span style="font-size:32px;color:#FF0000;">-lGLESv2 \</span> -lz LOCAL_WHOLE_STATIC_LIBRARIES := \ libavcodec \ libavfilter \ libavformat \ libavresample \ libavutil \ libpostproc \ libswresample \ libswscale include $(BUILD_SHARED_LIBRARY)
第一步：
寫java程式碼（主要是為了jni裡面的程式碼回撥java的程式碼實現，其中的妙用大家後面便知）
我把webrtc裡面的程式碼拿出來改動了一下，就沒自己去寫了（不用重複造輪子）
ViEAndroidGLES20.java
ViERenderer.javapackage hzcw.opengl; import java.util.concurrent.locks.ReentrantLock; import javax.microedition.khronos.egl.EGL10; import javax.microedition.khronos.egl.EGLConfig; import javax.microedition.khronos.egl.EGLContext; import javax.microedition.khronos.egl.EGLDisplay; import javax.microedition.khronos.opengles.GL10; import android.app.ActivityManager; import android.content.Context; import android.content.pm.ConfigurationInfo; import android.graphics.PixelFormat; import android.opengl.GLSurfaceView; import android.util.Log; public class ViEAndroidGLES20 extends GLSurfaceView implements GLSurfaceView.Renderer { private static String TAG = "MICloudPub"; private static final boolean DEBUG = false; // True if onSurfaceCreated has been called. private boolean surfaceCreated = false; private boolean openGLCreated = false; // True if NativeFunctionsRegistered has been called. private boolean nativeFunctionsRegisted = false; private ReentrantLock nativeFunctionLock = new ReentrantLock(); // Address of Native object that will do the drawing. private long nativeObject = 0; private int viewWidth = 0; private int viewHeight = 0; public static boolean UseOpenGL2(Object renderWindow) { return ViEAndroidGLES20.class.isInstance(renderWindow); } public ViEAndroidGLES20(Context context) { super(context); init(false, 0, 0); } public ViEAndroidGLES20(Context context, boolean translucent, int depth, int stencil) { super(context); init(translucent, depth, stencil); } private void init(boolean translucent, int depth, int stencil) { // By default, GLSurfaceView() creates a RGB_565 opaque surface. // If we want a translucent one, we should change the surface's // format here, using PixelFormat.TRANSLUCENT for GL Surfaces // is interpreted as any 32-bit surface with alpha by SurfaceFlinger. if (translucent) { this.getHolder().setFormat(PixelFormat.TRANSLUCENT); } // Setup the context factory for 2.0 rendering. // See ContextFactory class definition below setEGLContextFactory(new ContextFactory()); // We need to choose an EGLConfig that matches the format of // our surface exactly. This is going to be done in our // custom config chooser. See ConfigChooser class definition // below. setEGLConfigChooser( translucent ? new ConfigChooser(8, 8, 8, 8, depth, stencil) : new ConfigChooser(5, 6, 5, 0, depth, stencil) ); // Set the renderer responsible for frame rendering this.setRenderer(this); this.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY); } private static class ContextFactory implements GLSurfaceView.EGLContextFactory { private static int EGL_CONTEXT_CLIENT_VERSION = 0x3098; public EGLContext createContext(EGL10 egl, EGLDisplay display, EGLConfig eglConfig) { Log.w(TAG, "creating OpenGL ES 2.0 context"); checkEglError("Before eglCreateContext", egl); int[] attrib_list = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE }; EGLContext context = egl.eglCreateContext(display, eglConfig, EGL10.EGL_NO_CONTEXT, attrib_list); checkEglError("After eglCreateContext", egl); return context; } public void destroyContext(EGL10 egl, EGLDisplay display, EGLContext context) { egl.eglDestroyContext(display, context); } } private static void checkEglError(String prompt, EGL10 egl) { int error; while ((error = egl.eglGetError()) != EGL10.EGL_SUCCESS) { Log.e(TAG, String.format("%s: EGL error: 0x%x", prompt, error)); } } private static class ConfigChooser implements GLSurfaceView.EGLConfigChooser { public ConfigChooser(int r, int g, int b, int a, int depth, int stencil) { mRedSize = r; mGreenSize = g; mBlueSize = b; mAlphaSize = a; mDepthSize = depth; mStencilSize = stencil; } // This EGL config specification is used to specify 2.0 rendering. // We use a minimum size of 4 bits for red/green/blue, but will // perform actual matching in chooseConfig() below. private static int EGL_OPENGL_ES2_BIT = 4; private static int[] s_configAttribs2 = { EGL10.EGL_RED_SIZE, 4, EGL10.EGL_GREEN_SIZE, 4, EGL10.EGL_BLUE_SIZE, 4, EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, EGL10.EGL_NONE }; public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) { // Get the number of minimally matching EGL configurations int[] num_config = new int[1]; egl.eglChooseConfig(display, s_configAttribs2, null, 0, num_config); int numConfigs = num_config[0]; if (numConfigs <= 0) { throw new IllegalArgumentException("No configs match configSpec"); } // Allocate then read the array of minimally matching EGL configs EGLConfig[] configs = new EGLConfig[numConfigs]; egl.eglChooseConfig(display, s_configAttribs2, configs, numConfigs, num_config); if (DEBUG) { printConfigs(egl, display, configs); } // Now return the "best" one return chooseConfig(egl, display, configs); } public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display, EGLConfig[] configs) { for(EGLConfig config : configs) { int d = findConfigAttrib(egl, display, config, EGL10.EGL_DEPTH_SIZE, 0); int s = findConfigAttrib(egl, display, config, EGL10.EGL_STENCIL_SIZE, 0); // We need at least mDepthSize and mStencilSize bits if (d < mDepthSize || s < mStencilSize) continue; // We want an *exact* match for red/green/blue/alpha int r = findConfigAttrib(egl, display, config, EGL10.EGL_RED_SIZE, 0); int g = findConfigAttrib(egl, display, config, EGL10.EGL_GREEN_SIZE, 0); int b = findConfigAttrib(egl, display, config, EGL10.EGL_BLUE_SIZE, 0); int a = findConfigAttrib(egl, display, config, EGL10.EGL_ALPHA_SIZE, 0); if (r == mRedSize && g == mGreenSize && b == mBlueSize && a == mAlphaSize) return config; } return null; } private int findConfigAttrib(EGL10 egl, EGLDisplay display, EGLConfig config, int attribute, int defaultValue) { if (egl.eglGetConfigAttrib(display, config, attribute, mValue)) { return mValue[0]; } return defaultValue; } private void printConfigs(EGL10 egl, EGLDisplay display, EGLConfig[] configs) { int numConfigs = configs.length; Log.w(TAG, String.format("%d configurations", numConfigs)); for (int i = 0; i < numConfigs; i++) { Log.w(TAG, String.format("Configuration %d:\n", i)); printConfig(egl, display, configs[i]); } } private void printConfig(EGL10 egl, EGLDisplay display, EGLConfig config) { int[] attributes = { EGL10.EGL_BUFFER_SIZE, EGL10.EGL_ALPHA_SIZE, EGL10.EGL_BLUE_SIZE, EGL10.EGL_GREEN_SIZE, EGL10.EGL_RED_SIZE, EGL10.EGL_DEPTH_SIZE, EGL10.EGL_STENCIL_SIZE, EGL10.EGL_CONFIG_CAVEAT, EGL10.EGL_CONFIG_ID, EGL10.EGL_LEVEL, EGL10.EGL_MAX_PBUFFER_HEIGHT, EGL10.EGL_MAX_PBUFFER_PIXELS, EGL10.EGL_MAX_PBUFFER_WIDTH, EGL10.EGL_NATIVE_RENDERABLE, EGL10.EGL_NATIVE_VISUAL_ID, EGL10.EGL_NATIVE_VISUAL_TYPE, 0x3030, // EGL10.EGL_PRESERVED_RESOURCES, EGL10.EGL_SAMPLES, EGL10.EGL_SAMPLE_BUFFERS, EGL10.EGL_SURFACE_TYPE, EGL10.EGL_TRANSPARENT_TYPE, EGL10.EGL_TRANSPARENT_RED_VALUE, EGL10.EGL_TRANSPARENT_GREEN_VALUE, EGL10.EGL_TRANSPARENT_BLUE_VALUE, 0x3039, // EGL10.EGL_BIND_TO_TEXTURE_RGB, 0x303A, // EGL10.EGL_BIND_TO_TEXTURE_RGBA, 0x303B, // EGL10.EGL_MIN_SWAP_INTERVAL, 0x303C, // EGL10.EGL_MAX_SWAP_INTERVAL, EGL10.EGL_LUMINANCE_SIZE, EGL10.EGL_ALPHA_MASK_SIZE, EGL10.EGL_COLOR_BUFFER_TYPE, EGL10.EGL_RENDERABLE_TYPE, 0x3042 // EGL10.EGL_CONFORMANT }; String[] names = { "EGL_BUFFER_SIZE", "EGL_ALPHA_SIZE", "EGL_BLUE_SIZE", "EGL_GREEN_SIZE", "EGL_RED_SIZE", "EGL_DEPTH_SIZE", "EGL_STENCIL_SIZE", "EGL_CONFIG_CAVEAT", "EGL_CONFIG_ID", "EGL_LEVEL", "EGL_MAX_PBUFFER_HEIGHT", "EGL_MAX_PBUFFER_PIXELS", "EGL_MAX_PBUFFER_WIDTH", "EGL_NATIVE_RENDERABLE", "EGL_NATIVE_VISUAL_ID", "EGL_NATIVE_VISUAL_TYPE", "EGL_PRESERVED_RESOURCES", "EGL_SAMPLES", "EGL_SAMPLE_BUFFERS", "EGL_SURFACE_TYPE", "EGL_TRANSPARENT_TYPE", "EGL_TRANSPARENT_RED_VALUE", "EGL_TRANSPARENT_GREEN_VALUE", "EGL_TRANSPARENT_BLUE_VALUE", "EGL_BIND_TO_TEXTURE_RGB", "EGL_BIND_TO_TEXTURE_RGBA", "EGL_MIN_SWAP_INTERVAL", "EGL_MAX_SWAP_INTERVAL", "EGL_LUMINANCE_SIZE", "EGL_ALPHA_MASK_SIZE", "EGL_COLOR_BUFFER_TYPE", "EGL_RENDERABLE_TYPE", "EGL_CONFORMANT" }; int[] value = new int[1]; for (int i = 0; i < attributes.length; i++) { int attribute = attributes[i]; String name = names[i]; if (egl.eglGetConfigAttrib(display, config, attribute, value)) { Log.w(TAG, String.format(" %s: %d\n", name, value[0])); } else { // Log.w(TAG, String.format(" %s: failed\n", name)); while (egl.eglGetError() != EGL10.EGL_SUCCESS); } } } // Subclasses can adjust these values: protected int mRedSize; protected int mGreenSize; protected int mBlueSize; protected int mAlphaSize; protected int mDepthSize; protected int mStencilSize; private int[] mValue = new int[1]; } // IsSupported // Return true if this device support Open GL ES 2.0 rendering. public static boolean IsSupported(Context context) { ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); ConfigurationInfo info = am.getDeviceConfigurationInfo(); if(info.reqGlEsVersion >= 0x20000) { // Open GL ES 2.0 is supported. return true; } return false; } public void onDrawFrame(GL10 gl) { nativeFunctionLock.lock(); if(!nativeFunctionsRegisted || !surfaceCreated) { nativeFunctionLock.unlock(); return; } if(!openGLCreated) { if(0 != CreateOpenGLNative(nativeObject, viewWidth, viewHeight)) { return; // Failed to create OpenGL } openGLCreated = true; // Created OpenGL successfully } DrawNative(nativeObject); // Draw the new frame nativeFunctionLock.unlock(); } public void onSurfaceChanged(GL10 gl, int width, int height) { surfaceCreated = true; viewWidth = width; viewHeight = height; nativeFunctionLock.lock(); if(nativeFunctionsRegisted) { if(CreateOpenGLNative(nativeObject,width,height) == 0) openGLCreated = true; } nativeFunctionLock.unlock(); } public void onSurfaceCreated(GL10 gl, EGLConfig config) { } public void RegisterNativeObject(long nativeObject) { nativeFunctionLock.lock(); this.nativeObject = nativeObject; nativeFunctionsRegisted = true; nativeFunctionLock.unlock(); } public void DeRegisterNativeObject() { nativeFunctionLock.lock(); nativeFunctionsRegisted = false; openGLCreated = false; this.nativeObject = 0; nativeFunctionLock.unlock(); } public void ReDraw() {// jni層解碼以後的資料回撥，然後由系統呼叫onDrawFrame顯示 if(surfaceCreated) { // Request the renderer to redraw using the render thread context. this.requestRender(); } } private native int CreateOpenGLNative(long nativeObject, int width, int height); private native void DrawNative(long nativeObject); }
package hzcw.opengl;
import android.content.Context;
import android.view.SurfaceView;
public class ViERenderer
{
public static SurfaceView CreateRenderer(Context context) {
return CreateRenderer(context, false);
}
public static SurfaceView CreateRenderer(Context context,
boolean useOpenGLES2) {
if(useOpenGLES2 == true && ViEAndroidGLES20.IsSupported(context))
return new ViEAndroidGLES20(context);
else
return null;
}
}
GL2JNILib.java （native介面程式碼）
package com.example.filltriangle;
public class GL2JNILib {
static {
System.loadLibrary("MICloudPub");
}
/**
*/
public static native void init(Object glSurface);
public static native void step(String filepath);
}
第二步：寫jni程式碼
com_example_filltriangle_GL2JNILib.h （javah自動生成的）
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class com_example_filltriangle_GL2JNILib */
#ifndef _Included_com_example_filltriangle_GL2JNILib
#define _Included_com_example_filltriangle_GL2JNILib
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: com_example_filltriangle_GL2JNILib
* Method: init
* Signature: (II)V
*/
JNIEXPORT void JNICALL Java_com_example_filltriangle_GL2JNILib_init
(JNIEnv *, jclass, jobject);
/*
* Class: com_example_filltriangle_GL2JNILib
* Method: step
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_com_example_filltriangle_GL2JNILib_step
(JNIEnv *, jclass, jstring);
#ifdef __cplusplus
}
#endif
#endif
test.cpp
#include <jni.h>
#include <stdlib.h>
#include <stdio.h>
#include "render_opengles20.h"
#include "com_example_filltriangle_GL2JNILib.h"
#include "H264Decoder.h"
class AndroidNativeOpenGl2Channel
{
public:
AndroidNativeOpenGl2Channel(JavaVM* jvm,
void* window)
{
_jvm = jvm;
_ptrWindow = window;
_buffer = (uint8_t*)malloc(1024000);
}
~AndroidNativeOpenGl2Channel()
{
if (_jvm)
{
bool isAttached = false;
JNIEnv* env = NULL;
if (_jvm->GetEnv((void**) &env, JNI_VERSION_1_4) != JNI_OK) {
// try to attach the thread and get the env
// Attach this thread to JVM
jint res = _jvm->AttachCurrentThread(&env, NULL);
// Get the JNI env for this thread
if ((res < 0) || !env) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: Could not attach thread to JVM (%d, %p)",
__FUNCTION__, res, env);
env = NULL;
} else {
isAttached = true;
}
}
if (env && _deRegisterNativeCID) {
env->CallVoidMethod(_javaRenderObj, _deRegisterNativeCID);
}
env->DeleteGlobalRef(_javaRenderObj);
env->DeleteGlobalRef(_javaRenderClass);
if (isAttached) {
if (_jvm->DetachCurrentThread() < 0) {
WEBRTC_TRACE(kTraceWarning, kTraceVideoRenderer, _id,
"%s: Could not detach thread from JVM",
__FUNCTION__);
}
}
}
free(_buffer);
}
int32_t Init()
{
if (!_ptrWindow)
{
WEBRTC_TRACE(kTraceWarning, kTraceVideoRenderer, _id,
"(%s): No window have been provided.", __FUNCTION__);
return -1;
}
if (!_jvm)
{
WEBRTC_TRACE(kTraceWarning, kTraceVideoRenderer, _id,
"(%s): No JavaVM have been provided.", __FUNCTION__);
return -1;
}
// get the JNI env for this thread
bool isAttached = false;
JNIEnv* env = NULL;
if (_jvm->GetEnv((void**) &env, JNI_VERSION_1_4) != JNI_OK) {
// try to attach the thread and get the env
// Attach this thread to JVM
jint res = _jvm->AttachCurrentThread(&env, NULL);
// Get the JNI env for this thread
if ((res < 0) || !env) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: Could not attach thread to JVM (%d, %p)",
__FUNCTION__, res, env);
return -1;
}
isAttached = true;
}
// get the ViEAndroidGLES20 class
jclass javaRenderClassLocal = reinterpret_cast<jclass> (env->FindClass("hzcw/opengl/ViEAndroidGLES20"));
if (!javaRenderClassLocal) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: could not find ViEAndroidGLES20", __FUNCTION__);
return -1;
}
_javaRenderClass = reinterpret_cast<jclass> (env->NewGlobalRef(javaRenderClassLocal));
if (!_javaRenderClass) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: could not create Java SurfaceHolder class reference",
__FUNCTION__);
return -1;
}
// Delete local class ref, we only use the global ref
env->DeleteLocalRef(javaRenderClassLocal);
jmethodID cidUseOpenGL = env->GetStaticMethodID(_javaRenderClass,
"UseOpenGL2",
"(Ljava/lang/Object;)Z");
if (cidUseOpenGL == NULL) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, -1,
"%s: could not get UseOpenGL ID", __FUNCTION__);
return false;
}
jboolean res = env->CallStaticBooleanMethod(_javaRenderClass,
cidUseOpenGL, (jobject) _ptrWindow);
// create a reference to the object (to tell JNI that we are referencing it
// after this function has returned)
_javaRenderObj = reinterpret_cast<jobject> (env->NewGlobalRef((jobject)_ptrWindow));
if (!_javaRenderObj)
{
WEBRTC_TRACE(
kTraceError,
kTraceVideoRenderer,
_id,
"%s: could not create Java SurfaceRender object reference",
__FUNCTION__);
return -1;
}
// get the method ID for the ReDraw function
_redrawCid = env->GetMethodID(_javaRenderClass, "ReDraw", "()V");
if (_redrawCid == NULL) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: could not get ReDraw ID", __FUNCTION__);
return -1;
}
_registerNativeCID = env->GetMethodID(_javaRenderClass,
"RegisterNativeObject", "(J)V");
if (_registerNativeCID == NULL) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: could not get RegisterNativeObject ID", __FUNCTION__);
return -1;
}
_deRegisterNativeCID = env->GetMethodID(_javaRenderClass,
"DeRegisterNativeObject", "()V");
if (_deRegisterNativeCID == NULL) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: could not get DeRegisterNativeObject ID",
__FUNCTION__);
return -1;
}
JNINativeMethod nativeFunctions[2] = {
{ "DrawNative",
"(J)V",
(void*) &AndroidNativeOpenGl2Channel::DrawNativeStatic, },
{ "CreateOpenGLNative",
"(JII)I",
(void*) &AndroidNativeOpenGl2Channel::CreateOpenGLNativeStatic },
};
if (env->RegisterNatives(_javaRenderClass, nativeFunctions, 2) == 0) {
WEBRTC_TRACE(kTraceDebug, kTraceVideoRenderer, -1,
"%s: Registered native functions", __FUNCTION__);
}
else {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, -1,
"%s: Failed to register native functions", __FUNCTION__);
return -1;
}
env->CallVoidMethod(_javaRenderObj, _registerNativeCID, (jlong) this);
if (isAttached) {
if (_jvm->DetachCurrentThread() < 0) {
WEBRTC_TRACE(kTraceWarning, kTraceVideoRenderer, _id,
"%s: Could not detach thread from JVM", __FUNCTION__);
}
}
WEBRTC_TRACE(kTraceDebug, kTraceVideoRenderer, _id, "%s done",
__FUNCTION__);
// if (_openGLRenderer.SetCoordinates(zOrder, left, top, right, bottom) != 0) {
// return -1;
// }
return 0;
}
void DeliverFrame(int32_t widht, int32_t height)
{
if (_jvm)
{
bool isAttached = false;
JNIEnv* env = NULL;
if (_jvm->GetEnv((void**) &env, JNI_VERSION_1_4) != JNI_OK) {
// try to attach the thread and get the env
// Attach this thread to JVM
jint res = _jvm->AttachCurrentThread(&env, NULL);
// Get the JNI env for this thread
if ((res < 0) || !env) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: Could not attach thread to JVM (%d, %p)",
__FUNCTION__, res, env);
env = NULL;
} else {
isAttached = true;
}
}
if (env && _redrawCid)
{
_widht = widht;
_height = height;
env->CallVoidMethod(_javaRenderObj, _redrawCid);
}
if (isAttached) {
if (_jvm->DetachCurrentThread() < 0) {
WEBRTC_TRACE(kTraceWarning, kTraceVideoRenderer, _id,
"%s: Could not detach thread from JVM",
__FUNCTION__);
}
}
}
}
void GetDataBuf(uint8_t*& pbuf, int32_t& isize)
{
pbuf = _buffer;
isize = 1024000;
}
static jint CreateOpenGLNativeStatic(JNIEnv * env,
jobject,
jlong context,
jint width,
jint height)
{
AndroidNativeOpenGl2Channel* renderChannel =
reinterpret_cast<AndroidNativeOpenGl2Channel*> (context);
WEBRTC_TRACE(kTraceInfo, kTraceVideoRenderer, -1, "%s:", __FUNCTION__);
return renderChannel->CreateOpenGLNative(width, height);
}
static void DrawNativeStatic(JNIEnv * env,jobject, jlong context)
{
AndroidNativeOpenGl2Channel* renderChannel =
reinterpret_cast<AndroidNativeOpenGl2Channel*>(context);
renderChannel->DrawNative();
}
jint CreateOpenGLNative(int width, int height)
{
return _openGLRenderer.Setup(width, height);
}
void DrawNative()
{
_openGLRenderer.Render(_buffer, _widht, _height);
}
private:
JavaVM* _jvm;
void* _ptrWindow;
jobject _javaRenderObj;
jclass _javaRenderClass;
JNIEnv* _javaRenderJniEnv;
jmethodID _redrawCid;
jmethodID _registerNativeCID;
jmethodID _deRegisterNativeCID;
RenderOpenGles20 _openGLRenderer;
uint8_t* _buffer;
int32_t _widht;
int32_t _height;
};
static JavaVM* g_jvm = NULL;
static AndroidNativeOpenGl2Channel* p_opengl_channel = NULL;
extern "C"
{
JNIEXPORT jint JNI_OnLoad(JavaVM* vm, void *reserved)
{
JNIEnv* env = NULL;
jint result = -1;
if (vm->GetEnv((void**) &env, JNI_VERSION_1_4) != JNI_OK)
return -1;
g_jvm = vm;
return JNI_VERSION_1_4;
}
}
extern "C"
{
int mTrans = 0x0F0F0F0F;
int MergeBuffer(uint8_t *NalBuf, int NalBufUsed, uint8_t *SockBuf, int SockBufUsed, int SockRemain)
{
//把讀取的數劇分割成NAL塊
int i = 0;
char Temp;
for (i = 0; i < SockRemain; i++) {
Temp = SockBuf[i + SockBufUsed];
NalBuf[i + NalBufUsed] = Temp;
mTrans <<= 8;
mTrans |= Temp;
if (mTrans == 1) // 找到一個開始字
{
i++;
break;
}
}
return i;
}
JNIEXPORT void JNICALL Java_com_example_filltriangle_GL2JNILib_init
(JNIEnv *env, jclass oclass, jobject glSurface)
{
if (p_opengl_channel)
{
WEBRTC_TRACE(kTraceInfo, kTraceVideoRenderer, -1, "初期化失敗[%d].", __LINE__);
return;
}
p_opengl_channel = new AndroidNativeOpenGl2Channel(g_jvm, glSurface);
if (p_opengl_channel->Init() != 0)
{
WEBRTC_TRACE(kTraceInfo, kTraceVideoRenderer, -1, "初期化失敗[%d].", __LINE__);
return;
}
}
JNIEXPORT void JNICALL Java_com_example_filltriangle_GL2JNILib_step(JNIEnv* env, jclass tis, jstring filepath)
{
const char *filename = env->GetStringUTFChars(filepath, NULL);
WEBRTC_TRACE(kTraceInfo, kTraceVideoRenderer, -1, "step[%d].", __LINE__);
FILE *_imgFileHandle = fopen(filename, "rb");
if (_imgFileHandle == NULL)
{
WEBRTC_TRACE(kTraceInfo, kTraceVideoRenderer, -1, "File No Exist[%s][%d].", filename, __LINE__);
return;
}
H264Decoder* pMyH264 = new H264Decoder();
X264_DECODER_H handle = pMyH264->X264Decoder_Init();
if (handle <= 0)
{
WEBRTC_TRACE(kTraceInfo, kTraceVideoRenderer, -1, "X264Decoder_Init Error[%d].", __LINE__);
return;
}
int iTemp = 0;
int nalLen;
int bytesRead = 0;
int NalBufUsed = 0;
int SockBufUsed = 0;
bool bFirst = true;
bool bFindPPS = true;
uint8_t *SockBuf = (uint8_t *)malloc(204800);
uint8_t *NalBuf = (uint8_t *)malloc(4098000);
int nWidth, nHeight;
memset(SockBuf, 0, 204800);
uint8_t *buffOut = NULL;
int outSize = 0;
p_opengl_channel->GetDataBuf(buffOut, outSize);
uint8_t *IIBuf = (uint8_t *)malloc(204800);
int IILen = 0;
do {
bytesRead = fread(SockBuf, 1, 204800, _imgFileHandle);
WEBRTC_TRACE(kTraceInfo, kTraceVideoRenderer, -1, "bytesRead = %d", bytesRead);
if (bytesRead <= 0) {
break;
}
SockBufUsed = 0;
while (bytesRead - SockBufUsed > 0) {
nalLen = MergeBuffer(NalBuf, NalBufUsed, SockBuf, SockBufUsed,
bytesRead - SockBufUsed);
NalBufUsed += nalLen;
SockBufUsed += nalLen;
while (mTrans == 1) {
mTrans = 0xFFFFFFFF;
if (bFirst == true) // the first start flag
{
bFirst = false;
}
else // a complete NAL data, include 0x00000001 trail.
{
if (bFindPPS == true) // true
{
if ((NalBuf[4] & 0x1F) == 7 || (NalBuf[4] & 0x1F) == 8)
{
bFindPPS = false;
}
else
{
NalBuf[0] = 0;
NalBuf[1] = 0;
NalBuf[2] = 0;
NalBuf[3] = 1;
NalBufUsed = 4;
break;
}
}
if (NalBufUsed == 16 || NalBufUsed == 10 || NalBufUsed == 54 || NalBufUsed == 12 || NalBufUsed == 20) {
memcpy(IIBuf + IILen, NalBuf, NalBufUsed);
IILen += NalBufUsed;
}
else
{
memcpy(IIBuf + IILen, NalBuf, NalBufUsed);
IILen += NalBufUsed;
// decode nal
iTemp = pMyH264->X264Decoder_Decode(handle, (uint8_t *)IIBuf,
IILen, (uint8_t *)buffOut,
outSize, &nWidth, &nHeight);
if (iTemp == 0) {
WEBRTC_TRACE(kTraceInfo, kTraceVideoRenderer, -1, "解碼成功,寬度:%d高度:%d,解碼資料長度:%d.", nWidth, nHeight, iTemp);
// [self.glView setVideoSize:nWidth height:nHeight];
// [self.glView displayYUV420pData:buffOut
// width:nWidth
// height:nHeight];
p_opengl_channel->DeliverFrame(nWidth, nHeight);
}
else
{
WEBRTC_TRACE(kTraceInfo, kTraceVideoRenderer, -1, "解碼失敗.");
}
IILen = 0;
}
}
NalBuf[0]=0;
NalBuf[1]=0;
NalBuf[2]=0;
NalBuf[3]=1;
NalBufUsed=4;
}
}
}while (bytesRead>0);
fclose(_imgFileHandle);
pMyH264->X264Decoder_UnInit(handle);
free(SockBuf);
free(NalBuf);
delete pMyH264;
env->ReleaseStringUTFChars(filepath, filename);
}
}
render_opengles20.cpp
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdio.h>
#include "render_opengles20.h"
const char RenderOpenGles20::g_indices[] = { 0, 3, 2, 0, 2, 1 };
const char RenderOpenGles20::g_vertextShader[] = {
"attribute vec4 aPosition;\n"
"attribute vec2 aTextureCoord;\n"
"varying vec2 vTextureCoord;\n"
"void main() {\n"
" gl_Position = aPosition;\n"
" vTextureCoord = aTextureCoord;\n"
"}\n" };
// The fragment shader.
// Do YUV to RGB565 conversion.
const char RenderOpenGles20::g_fragmentShader[] = {
"precision mediump float;\n"
"uniform sampler2D Ytex;\n"
"uniform sampler2D Utex,Vtex;\n"
"varying vec2 vTextureCoord;\n"
"void main(void) {\n"
" float nx,ny,r,g,b,y,u,v;\n"
" mediump vec4 txl,ux,vx;"
" nx=vTextureCoord[0];\n"
" ny=vTextureCoord[1];\n"
" y=texture2D(Ytex,vec2(nx,ny)).r;\n"
" u=texture2D(Utex,vec2(nx,ny)).r;\n"
" v=texture2D(Vtex,vec2(nx,ny)).r;\n"
//" y = v;\n"+
" y=1.1643*(y-0.0625);\n"
" u=u-0.5;\n"
" v=v-0.5;\n"
" r=y+1.5958*v;\n"
" g=y-0.39173*u-0.81290*v;\n"
" b=y+2.017*u;\n"
" gl_FragColor=vec4(r,g,b,1.0);\n"
"}\n" };
RenderOpenGles20::RenderOpenGles20() :
_id(0),
_textureWidth(-1),
_textureHeight(-1)
{
WEBRTC_TRACE(kTraceDebug, kTraceVideoRenderer, _id, "%s: id %d",
__FUNCTION__, (int) _id);
const GLfloat vertices[20] = {
// X, Y, Z, U, V
-1, -1, 0, 1, 0, // Bottom Left
1, -1, 0, 0, 0, //Bottom Right
1, 1, 0, 0, 1, //Top Right
-1, 1, 0, 1, 1 }; //Top Left
memcpy(_vertices, vertices, sizeof(_vertices));
}
RenderOpenGles20::~RenderOpenGles20() {
glDeleteTextures(3, _textureIds);
}
int32_t RenderOpenGles20::Setup(int32_t width, int32_t height) {
WEBRTC_TRACE(kTraceDebug, kTraceVideoRenderer, _id,
"%s: width %d, height %d", __FUNCTION__, (int) width,
(int) height);
printGLString("Version", GL_VERSION);
printGLString("Vendor", GL_VENDOR);
printGLString("Renderer", GL_RENDERER);
printGLString("Extensions", GL_EXTENSIONS);
int maxTextureImageUnits[2];
int maxTextureSize[2];
glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, maxTextureImageUnits);
glGetIntegerv(GL_MAX_TEXTURE_SIZE, maxTextureSize);
WEBRTC_TRACE(kTraceDebug, kTraceVideoRenderer, _id,
"%s: number of textures %d, size %d", __FUNCTION__,
(int) maxTextureImageUnits[0], (int) maxTextureSize[0]);
_program = createProgram(g_vertextShader, g_fragmentShader);
if (!_program) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: Could not create program", __FUNCTION__);
return -1;
}
int positionHandle = glGetAttribLocation(_program, "aPosition");
checkGlError("glGetAttribLocation aPosition");
if (positionHandle == -1) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: Could not get aPosition handle", __FUNCTION__);
return -1;
}
int textureHandle = glGetAttribLocation(_program, "aTextureCoord");
checkGlError("glGetAttribLocation aTextureCoord");
if (textureHandle == -1) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: Could not get aTextureCoord handle", __FUNCTION__);
return -1;
}
// set the vertices array in the shader
// _vertices contains 4 vertices with 5 coordinates.
// 3 for (xyz) for the vertices and 2 for the texture
glVertexAttribPointer(positionHandle, 3, GL_FLOAT, false,
5 * sizeof(GLfloat), _vertices);
checkGlError("glVertexAttribPointer aPosition");
glEnableVertexAttribArray(positionHandle);
checkGlError("glEnableVertexAttribArray positionHandle");
// set the texture coordinate array in the shader
// _vertices contains 4 vertices with 5 coordinates.
// 3 for (xyz) for the vertices and 2 for the texture
glVertexAttribPointer(textureHandle, 2, GL_FLOAT, false, 5
* sizeof(GLfloat), &_vertices[3]);
checkGlError("glVertexAttribPointer maTextureHandle");
glEnableVertexAttribArray(textureHandle);
checkGlError("glEnableVertexAttribArray textureHandle");
glUseProgram(_program);
int i = glGetUniformLocation(_program, "Ytex");
checkGlError("glGetUniformLocation");
glUniform1i(i, 0); /* Bind Ytex to texture unit 0 */
checkGlError("glUniform1i Ytex");
i = glGetUniformLocation(_program, "Utex");
checkGlError("glGetUniformLocation Utex");
glUniform1i(i, 1); /* Bind Utex to texture unit 1 */
checkGlError("glUniform1i Utex");
i = glGetUniformLocation(_program, "Vtex");
checkGlError("glGetUniformLocation");
glUniform1i(i, 2); /* Bind Vtex to texture unit 2 */
checkGlError("glUniform1i");
glViewport(0, 0, width, height);
checkGlError("glViewport");
return 0;
}
// SetCoordinates
// Sets the coordinates where the stream shall be rendered.
// Values must be between 0 and 1.
int32_t RenderOpenGles20::SetCoordinates(int32_t zOrder,
const float left,
const float top,
const float right,
const float bottom) {
if ((top > 1 || top < 0) || (right > 1 || right < 0) ||
(bottom > 1 || bottom < 0) || (left > 1 || left < 0)) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: Wrong coordinates", __FUNCTION__);
return -1;
}
// X, Y, Z, U, V
// -1, -1, 0, 0, 1, // Bottom Left
// 1, -1, 0, 1, 1, //Bottom Right
// 1, 1, 0, 1, 0, //Top Right
// -1, 1, 0, 0, 0 //Top Left
// Bottom Left
_vertices[0] = (left * 2) - 1;
_vertices[1] = -1 * (2 * bottom) + 1;
_vertices[2] = zOrder;
//Bottom Right
_vertices[5] = (right * 2) - 1;
_vertices[6] = -1 * (2 * bottom) + 1;
_vertices[7] = zOrder;
//Top Right
_vertices[10] = (right * 2) - 1;
_vertices[11] = -1 * (2 * top) + 1;
_vertices[12] = zOrder;
//Top Left
_vertices[15] = (left * 2) - 1;
_vertices[16] = -1 * (2 * top) + 1;
_vertices[17] = zOrder;
return 0;
}
GLuint RenderOpenGles20::loadShader(GLenum shaderType, const char* pSource)
{
GLuint shader = glCreateShader(shaderType);
if (shader) {
glShaderSource(shader, 1, &pSource, NULL);
glCompileShader(shader);
GLint compiled = 0;
glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
if (!compiled) {
GLint infoLen = 0;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
if (infoLen) {
char* buf = (char*) malloc(infoLen);
if (buf) {
glGetShaderInfoLog(shader, infoLen, NULL, buf);
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: Could not compile shader %d: %s",
__FUNCTION__, shaderType, buf);
free(buf);
}
glDeleteShader(shader);
shader = 0;
}
}
}
return shader;
}
GLuint RenderOpenGles20::createProgram(const char* pVertexSource,
const char* pFragmentSource) {
GLuint vertexShader = loadShader(GL_VERTEX_SHADER, pVertexSource);
if (!vertexShader) {
return 0;
}
GLuint pixelShader = loadShader(GL_FRAGMENT_SHADER, pFragmentSource);
if (!pixelShader) {
return 0;
}
GLuint program = glCreateProgram();
if (program) {
glAttachShader(program, vertexShader);
checkGlError("glAttachShader");
glAttachShader(program, pixelShader);
checkGlError("glAttachShader");
glLinkProgram(program);
GLint linkStatus = GL_FALSE;
glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
if (linkStatus != GL_TRUE) {
GLint bufLength = 0;
glGetProgramiv(program, GL_INFO_LOG_LENGTH, &bufLength);
if (bufLength) {
char* buf = (char*) malloc(bufLength);
if (buf) {
glGetProgramInfoLog(program, bufLength, NULL, buf);
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"%s: Could not link program: %s",
__FUNCTION__, buf);
free(buf);
}
}
glDeleteProgram(program);
program = 0;
}
}
return program;
}
void RenderOpenGles20::printGLString(const char *name, GLenum s) {
const char *v = (const char *) glGetString(s);
WEBRTC_TRACE(kTraceDebug, kTraceVideoRenderer, _id, "GL %s = %s\n",
name, v);
}
void RenderOpenGles20::checkGlError(const char* op) {
#ifdef ANDROID_LOG
for (GLint error = glGetError(); error; error = glGetError()) {
WEBRTC_TRACE(kTraceError, kTraceVideoRenderer, _id,
"after %s() glError (0x%x)\n", op, error);
}
#else
return;
#endif
}
static void InitializeTexture(int name, int id, int width, int height) {
glActiveTexture(name);
glBindTexture(GL_TEXTURE_2D, id);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, width, height, 0,
GL_LUMINANCE, GL_UNSIGNED_BYTE, NULL);
}
// Uploads a plane of pixel data, accounting for stride != width*bpp.
static void GlTexSubImage2D(GLsizei width, GLsizei height, int stride,
const uint8_t* plane) {
if (stride == width) {
// Yay! We can upload the entire plane in a single GL call.
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, GL_LUMINANCE,
GL_UNSIGNED_BYTE,
static_cast<const GLvoid*>(plane));
} else {
// Boo! Since GLES2 doesn't have GL_UNPACK_ROW_LENGTH and Android doesn't
// have GL_EXT_unpack_subimage we have to upload a row at a time. Ick.
for (int row = 0; row < height; ++row) {
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, row, width, 1, GL_LUMINANCE,
GL_UNSIGNED_BYTE,
static_cast<const GLvoid*>(plane + (row * stride)));
}
}
}
int32_t RenderOpenGles20::Render(void * data, int32_t widht, int32_t height)
{
WEBRTC_TRACE(kTraceDebug, kTraceVideoRenderer, _id, "%s: id %d",
__FUNCTION__, (int) _id);
glUseProgram(_program);
checkGlError("glUseProgram");
if (_textureWidth != (GLsizei) widht || _textureHeight != (GLsizei) height) {
SetupTextures(widht, height);
}
UpdateTextures(data, widht, height);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, g_indices);
checkGlError("glDrawArrays");
return 0;
}
void RenderOpenGles20::SetupTextures(int32_t width, int32_t height)
{
glDeleteTextures(3, _textureIds);
glGenTextures(3, _textureIds); //Generate the Y, U and V texture
InitializeTexture(GL_TEXTURE0, _textureIds[0], width, height);
InitializeTexture(GL_TEXTURE1, _textureIds[1], width / 2, height / 2);
InitializeTexture(GL_TEXTURE2, _textureIds[2], width / 2, height / 2);
checkGlError("SetupTextures");
_textureWidth = width;
_textureHeight = height;
}
void RenderOpenGles20::UpdateTextures(void* data, int32_t widht, int32_t height)
{
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, _textureIds[0]);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, widht, height, GL_LUMINANCE, GL_UNSIGNED_BYTE,
data);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, _textureIds[1]);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, widht / 2, height / 2, GL_LUMINANCE,
GL_UNSIGNED_BYTE, (char *)data + widht * height);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, _textureIds[2]);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, widht / 2, height / 2, GL_LUMINANCE,
GL_UNSIGNED_BYTE, (char *)data + widht * height * 5 / 4);
checkGlError("UpdateTextures");
}
H264Decoder.cpp （解碼程式碼，前面的部落格貼過程式碼，這裡就不貼了）
第三步：編譯jni，生成so檔案
第四步：把生成的so檔案拷貝到android工程裡面去，這裡貼一下我的Activity程式碼，如下：
package com.example.filltriangle;
import java.io.IOException;
import java.io.InputStream;
import hzcw.opengl.ViERenderer;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.SurfaceView;
public class FillTriangle extends Activity {
private SurfaceView mView = null;
static {
System.loadLibrary("MICloudPub");
}
@Override protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
mView = ViERenderer.CreateRenderer(this, true);
if (mView == null) {
Log.i("test", "mView is null");
}
setContentView(mView);
GL2JNILib.init(mView);
new MyThread().start();
}
public class MyThread extends Thread {
public void run() {
GL2JNILib.step("/sdcard/test.264");
}
}
}
這個demo就是讀一個視訊檔案，解碼以後在介面顯示出來。便於執行，最後上效果圖哈，免得有人懷疑專案真實性。
