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yangjie10930yangjie10930
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jni部分
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‎app/jnicode/jni/Android.mk‎

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LOCAL_PATH := $(call my-dir)
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include $(CLEAR_VARS)
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LOCAL_MODULE := libavutil
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LOCAL_SRC_FILES := prebuilt/libavutil.so
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include $(PREBUILT_SHARED_LIBRARY)
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include $(CLEAR_VARS)
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LOCAL_MODULE := libswresample
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LOCAL_SRC_FILES := prebuilt/libswresample.so
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include $(PREBUILT_SHARED_LIBRARY)
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include $(CLEAR_VARS)
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LOCAL_MODULE := libswscale
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LOCAL_SRC_FILES := prebuilt/libswscale.so
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include $(PREBUILT_SHARED_LIBRARY)
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include $(CLEAR_VARS)
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LOCAL_MODULE := libavcodec
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LOCAL_SRC_FILES := prebuilt/libavcodec.so
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include $(PREBUILT_SHARED_LIBRARY)
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include $(CLEAR_VARS)
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LOCAL_MODULE := libavformat
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LOCAL_SRC_FILES := prebuilt/libavformat.so
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include $(PREBUILT_SHARED_LIBRARY)
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include $(CLEAR_VARS)
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LOCAL_MODULE := libavfilter
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LOCAL_SRC_FILES := prebuilt/libavfilter.so
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include $(PREBUILT_SHARED_LIBRARY)
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include $(CLEAR_VARS)
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LOCAL_MODULE := libavdevice
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LOCAL_SRC_FILES := prebuilt/libavdevice.so
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include $(PREBUILT_SHARED_LIBRARY)
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include $(CLEAR_VARS)
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LOCAL_MODULE := libpostproc
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LOCAL_SRC_FILES := prebuilt/libpostproc.so
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include $(PREBUILT_SHARED_LIBRARY)
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include $(CLEAR_VARS)
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LOCAL_ARM_MODE := arm
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LOCAL_MODULE := ffmpeg
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LOCAL_SRC_FILES := Jni_FFmpegCmd.c\
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cmdutils.c \
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ffmpeg.c \
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ffmpeg_opt.c \
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ffmpeg_filter.c \
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ffmpeg_thread.c
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LOCAL_C_INCLUDES := E:\ijkPlayer\EpMedia\ffmpeg-3.3.4
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LOCAL_LDLIBS := -llog -ljnigraphics -lz -landroid -lm -pthread -L$(SYSROOT)/usr/lib -latomic
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LOCAL_SHARED_LIBRARIES := libavcodec libavfilter libavformat libavutil libswresample libswscale libavdevice libpostproc
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LOCAL_CFLAGS := -D__STDC_CONSTANT_MACROS -Wno-sign-compare -Wno-switch -Wno-pointer-sign -DHAVE_NEON=1 -fPIC -DANDROI
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include $(BUILD_SHARED_LIBRARY)

‎app/jnicode/jni/Application.mk‎

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APP_ABI := armeabi armeabi-v7a
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APP_PLATFORM=android-19

‎app/jnicode/jni/Jni_FFmpegCmd.c‎

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#include "Jni_FFmpegCmd.h"
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#include <string.h>
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#include "ffmpeg_thread.h"
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#include "android_log.h"
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#include "cmdutils.h"
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static JavaVM *jvm = NULL;
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//java虚拟机
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static jclass m_clazz = NULL;//当前类(面向java)
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/**
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* 回调执行Java方法
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* 参看 Jni反射+Java反射
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*/
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void callJavaMethod(JNIEnv *env, jclass clazz,int ret) {
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if (clazz == NULL) {
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LOGE("---------------clazz isNULL---------------");
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return;
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}
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//获取方法ID (I)V指的是方法签名 通过javap -s -public FFmpegCmd 命令生成
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jmethodID methodID = (*env)->GetStaticMethodID(env, clazz, "onExecuted", "(I)V");
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if (methodID == NULL) {
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LOGE("---------------methodID isNULL---------------");
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return;
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}
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//调用该java方法
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(*env)->CallStaticVoidMethod(env, clazz, methodID,ret);
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}
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void callJavaMethodProgress(JNIEnv *env, jclass clazz,float ret) {
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if (clazz == NULL) {
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LOGE("---------------clazz isNULL---------------");
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return;
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}
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//获取方法ID (I)V指的是方法签名 通过javap -s -public FFmpegCmd 命令生成
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jmethodID methodID = (*env)->GetStaticMethodID(env, clazz, "onProgress", "(F)V");
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if (methodID == NULL) {
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LOGE("---------------methodID isNULL---------------");
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return;
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}
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//调用该java方法
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(*env)->CallStaticVoidMethod(env, clazz, methodID,ret);
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}
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/**
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* c语言-线程回调
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*/
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static void ffmpeg_callback(int ret) {
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JNIEnv *env;
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//附加到当前线程从JVM中取出JNIEnv, C/C++从子线程中直接回到Java里的方法时 必须经过这个步骤
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(*jvm)->AttachCurrentThread(jvm, (void **) &env, NULL);
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callJavaMethod(env, m_clazz,ret);
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//完毕-脱离当前线程
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(*jvm)->DetachCurrentThread(jvm);
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}
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void ffmpeg_progress(float progress) {
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JNIEnv *env;
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(*jvm)->AttachCurrentThread(jvm, (void **) &env, NULL);
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callJavaMethodProgress(env, m_clazz,progress);
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(*jvm)->DetachCurrentThread(jvm);
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}
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/*
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* Class: JniTest_FFmpegCmd
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* Method: exec
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* Signature: (I[Ljava/lang/String;)I
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*/
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JNIEXPORT jint
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JNICALL Java_Jni_FFmpegCmd_exec
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(JNIEnv *env, jclass clazz, jint cmdnum, jobjectArray cmdline) {
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//---------------------------------C语言 反射Java 相关----------------------------------------
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//在jni的c线程中不允许使用共用的env环境变量 但JavaVM在整个jvm中是共用的 可通过保存JavaVM指针,到时候再通过JavaVM指针取出JNIEnv *env;
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//ICS之前(你可把NDK sdk版本改成低于11) 可以直接写m_clazz = clazz;直接赋值, 然而ICS(sdk11) 后便改变了这一机制,在线程中回调java时 不能直接共用变量 必须使用NewGlobalRef创建全局对象
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//官方文档正在拼命的解释这一原因,参看:http://android-developers.blogspot.jp/2011/11/jni-local-reference-changes-in-ics.html
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(*env)->GetJavaVM(env, &jvm);
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m_clazz = (*env)->NewGlobalRef(env, clazz);
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//---------------------------------C语言 反射Java 相关----------------------------------------
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//---------------------------------java 数组转C语言数组----------------------------------------
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int i = 0;//满足NDK所需的C99标准
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char **argv = NULL;//命令集 二维指针
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jstring *strr = NULL;
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if (cmdline != NULL) {
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argv = (char **) malloc(sizeof(char *) * cmdnum);
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strr = (jstring *) malloc(sizeof(jstring) * cmdnum);
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for (i = 0; i < cmdnum; ++i) {//转换
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strr[i] = (jstring)(*env)->GetObjectArrayElement(env, cmdline, i);
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argv[i] = (char *) (*env)->GetStringUTFChars(env, strr[i], 0);
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}
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}
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//---------------------------------java 数组转C语言数组----------------------------------------
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//---------------------------------执行FFmpeg命令相关----------------------------------------
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//新建线程 执行ffmpeg 命令
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ffmpeg_thread_run_cmd(cmdnum, argv);
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//注册ffmpeg命令执行完毕时的回调
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ffmpeg_thread_callback(ffmpeg_callback);
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free(strr);
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return 0;
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}
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JNIEXPORT void
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/*
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JNICALL Java_Jni_FFmpegCmd_exit
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(JNIEnv *env, jclass clazz) {
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(*env)->GetJavaVM(env, &jvm);
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m_clazz = (*env)->NewGlobalRef(env, clazz);
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ffmpeg_thread_cancel();
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}
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*/

‎app/jnicode/jni/Jni_FFmpegCmd.h‎

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‎app/jnicode/jni/android_log.h‎

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//#include <android/log.h>
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//#define LOGE(format, ...) __android_log_print(ANDROID_LOG_ERROR, "ffmpeg_vdtest", format, ##__VA_ARGS__)
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//#define LOGI(format, ...) __android_log_print(ANDROID_LOG_INFO, "ffmpeg_vdtest", format, ##__VA_ARGS__)
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#include <android/log.h>
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static int use_log_report = 0;
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#define FF_LOG_TAG "FFmpeg_EpMedia"
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#define FF_LOG_UNKNOWN ANDROID_LOG_UNKNOWN
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#define FF_LOG_DEFAULT ANDROID_LOG_DEFAULT
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#define FF_LOG_VERBOSE ANDROID_LOG_VERBOSE
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#define FF_LOG_DEBUG ANDROID_LOG_DEBUG
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#define FF_LOG_INFO ANDROID_LOG_INFO
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#define FF_LOG_WARN ANDROID_LOG_WARN
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#define FF_LOG_ERROR ANDROID_LOG_ERROR
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#define FF_LOG_FATAL ANDROID_LOG_FATAL
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#define FF_LOG_SILENT ANDROID_LOG_SILENT
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#define VLOG(level, TAG, ...) ((void)__android_log_vprint(level, TAG, __VA_ARGS__))
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#define VLOGV(...) VLOG(FF_LOG_VERBOSE, FF_LOG_TAG, __VA_ARGS__)
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#define VLOGD(...) VLOG(FF_LOG_DEBUG, FF_LOG_TAG, __VA_ARGS__)
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#define VLOGI(...) VLOG(FF_LOG_INFO, FF_LOG_TAG, __VA_ARGS__)
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#define VLOGW(...) VLOG(FF_LOG_WARN, FF_LOG_TAG, __VA_ARGS__)
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#define VLOGE(...) VLOG(FF_LOG_ERROR, FF_LOG_TAG, __VA_ARGS__)
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#define ALOG(level, TAG, ...) ((void)__android_log_print(level, TAG, __VA_ARGS__))
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#define ALOGV(...) ALOG(FF_LOG_VERBOSE, FF_LOG_TAG, __VA_ARGS__)
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#define ALOGD(...) ALOG(FF_LOG_DEBUG, FF_LOG_TAG, __VA_ARGS__)
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#define ALOGI(...) ALOG(FF_LOG_INFO, FF_LOG_TAG, __VA_ARGS__)
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#define ALOGW(...) ALOG(FF_LOG_WARN, FF_LOG_TAG, __VA_ARGS__)
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#define ALOGE(...) ALOG(FF_LOG_ERROR, FF_LOG_TAG, __VA_ARGS__)
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#define LOGE(format, ...) __android_log_print(ANDROID_LOG_ERROR, FF_LOG_TAG, format, ##__VA_ARGS__)
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#define LOGI(format, ...) __android_log_print(ANDROID_LOG_INFO, FF_LOG_TAG, format, ##__VA_ARGS__)
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/*belown printf info*/
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static void ffp_log_callback_brief(void *ptr, int level, const char *fmt, va_list vl)
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{
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int ffplv = FF_LOG_VERBOSE;
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if (level <= AV_LOG_ERROR)
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ffplv = FF_LOG_ERROR;
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else if (level <= AV_LOG_WARNING)
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ffplv = FF_LOG_WARN;
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else if (level <= AV_LOG_INFO)
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ffplv = FF_LOG_INFO;
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else if (level <= AV_LOG_VERBOSE)
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ffplv = FF_LOG_VERBOSE;
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else
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ffplv = FF_LOG_DEBUG;
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if (level <= AV_LOG_INFO)
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VLOG(ffplv, FF_LOG_TAG, fmt, vl);
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}
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static void ffp_log_callback_report(void *ptr, int level, const char *fmt, va_list vl)
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{
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int ffplv = FF_LOG_VERBOSE;
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if (level <= AV_LOG_ERROR)
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ffplv = FF_LOG_ERROR;
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else if (level <= AV_LOG_WARNING)
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ffplv = FF_LOG_WARN;
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else if (level <= AV_LOG_INFO)
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ffplv = FF_LOG_INFO;
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else if (level <= AV_LOG_VERBOSE)
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ffplv = FF_LOG_VERBOSE;
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else
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ffplv = FF_LOG_DEBUG;
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va_list vl2;
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char line[1024];
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static int print_prefix = 1;
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va_copy(vl2, vl);
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// av_log_default_callback(ptr, level, fmt, vl);
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av_log_format_line(ptr, level, fmt, vl2, line, sizeof(line), &print_prefix);
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va_end(vl2);
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ALOG(ffplv, FF_LOG_TAG, "%s", line);
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}
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‎app/jnicode/jni/ffmpeg_thread.c‎

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#include "libavcodec/avcodec.h"
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#include "ffmpeg_thread.h"
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#include "android_log.h"
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pthread_t ntid;
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char **argvs = NULL;
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int num=0;
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void *thread(void *arg)
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{ //执行
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int result = ffmpeg_exec(num, argvs);
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return ((void *)0);
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}
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/**
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* 新建子线程执行ffmpeg命令
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*/
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int ffmpeg_thread_run_cmd(int cmdnum,char **argv){
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num=cmdnum;
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argvs=argv;
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int temp =pthread_create(&ntid,NULL,thread,NULL);
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if(temp!=0)
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{
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LOGE("can't create thread: %s ",strerror(temp));
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return 1;
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}
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LOGI("create thread succes: %s ",strerror(temp));
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return 0;
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}
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static void (*ffmpeg_callback)(int ret);
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/**
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* 注册线程回调
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*/
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void ffmpeg_thread_callback(void (*cb)(int ret)){
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ffmpeg_callback = cb;
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}
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/**
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* 退出线程
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*/
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void ffmpeg_thread_exit(int ret){
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if (ffmpeg_callback) {
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ffmpeg_callback(ret);
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}
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pthread_exit("ffmpeg_thread_exit");
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}
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/**
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* 取消线程
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*/
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void ffmpeg_thread_cancel(){
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void *ret=NULL;
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pthread_join(ntid, &ret);
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}

‎app/jnicode/jni/ffmpeg_thread.h‎

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#include "libavcodec/avcodec.h"
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#include "libavformat/avformat.h"
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#include "libswscale/swscale.h"
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#include "ffmpeg.h"
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#include <pthread.h>
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#include <string.h>
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int ffmpeg_thread_run_cmd(int cmdnum,char **argv);
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void ffmpeg_thread_exit(int ret);
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void ffmpeg_thread_callback(void (*cb)(int ret));
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void ffmpeg_thread_cancel();

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