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FFmpeg-Invoker/library/src/main/cpp/ffmpeg-invoker.c

109 lines
3.7 KiB

#include "ffmpeg-invoker.h"
#include <jni.h>
#include <string.h>
#include "ffmpeg_thread.h"
#include "android_log.h"
#include "cmdutils.h"
static JavaVM *jvm = NULL;
//java虚拟机
static jclass m_clazz = NULL;//当前类(面向java)
/**
* 回调执行Java方法
* 参看 Jni反射+Java反射
*/
void callJavaMethod(JNIEnv *env, jclass clazz,int ret) {
if (clazz == NULL) {
LOGE("---------------clazz isNULL---------------");
return;
}
//获取方法ID (I)V指的是方法签名 通过javap -s -public FFmpegCmd 命令生成
jmethodID methodID = (*env)->GetStaticMethodID(env, clazz, "onExecuted", "(I)V");
if (methodID == NULL) {
LOGE("---------------methodID isNULL---------------");
return;
}
//调用该java方法
(*env)->CallStaticVoidMethod(env, clazz, methodID,ret);
}
void callJavaMethodProgress(JNIEnv *env, jclass clazz,float ret) {
if (clazz == NULL) {
LOGE("---------------clazz isNULL---------------");
return;
}
//获取方法ID (I)V指的是方法签名 通过javap -s -public FFmpegCmd 命令生成
jmethodID methodID = (*env)->GetStaticMethodID(env, clazz, "onProgress", "(F)V");
if (methodID == NULL) {
LOGE("---------------methodID isNULL---------------");
return;
}
//调用该java方法
(*env)->CallStaticVoidMethod(env, clazz, methodID,ret);
}
/**
* c语言-线程回调
*/
static void ffmpeg_callback(int ret) {
JNIEnv *env;
//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
(*jvm)->AttachCurrentThread(jvm, (void **) &env, NULL);
callJavaMethod(env, m_clazz,ret);
//完毕-脱离当前线程
(*jvm)->DetachCurrentThread(jvm);
}
void ffmpeg_progress(float progress) {
JNIEnv *env;
(*jvm)->AttachCurrentThread(jvm, (void **) &env, NULL);
callJavaMethodProgress(env, m_clazz,progress);
(*jvm)->DetachCurrentThread(jvm);
}
JNIEXPORT jint JNICALL
Java_com_github_xch168_ffmpeg_invoker_FFmpegInvoker_exec(JNIEnv *env, jclass clazz, jint cmdnum, jobjectArray cmdline) {
(*env)->GetJavaVM(env, &jvm);
m_clazz = (*env)->NewGlobalRef(env, clazz);
//---------------------------------C语言 反射Java 相关----------------------------------------
//---------------------------------java 数组转C语言数组----------------------------------------
int i = 0;//满足NDK所需的C99标准
char **argv = NULL;//命令集 二维指针
jstring *strr = NULL;
if (cmdline != NULL) {
argv = (char **) malloc(sizeof(char *) * cmdnum);
strr = (jstring *) malloc(sizeof(jstring) * cmdnum);
for (i = 0; i < cmdnum; ++i) {//转换
strr[i] = (jstring)(*env)->GetObjectArrayElement(env, cmdline, i);
argv[i] = (char *) (*env)->GetStringUTFChars(env, strr[i], 0);
}
}
//---------------------------------java 数组转C语言数组----------------------------------------
//---------------------------------执行FFmpeg命令相关----------------------------------------
//新建线程 执行ffmpeg 命令
ffmpeg_thread_run_cmd(cmdnum, argv);
//注册ffmpeg命令执行完毕时的回调
ffmpeg_thread_callback(ffmpeg_callback);
free(strr);
return 0;
}
JNIEXPORT void JNICALL
Java_com_github_xch168_ffmpeg_invoker_FFmpegInvoker_exit(JNIEnv *env, jclass type) {
(*env)->GetJavaVM(env, &jvm);
m_clazz = (*env)->NewGlobalRef(env, type);
ffmpeg_thread_cancel();
}
JNIEXPORT jstring JNICALL
Java_com_github_xch168_ffmpeg_invoker_FFmpegInvoker_getConfigInfo(JNIEnv *env, jclass clazz) {
char info[10000] = {0};
sprintf(info, "%s\n", avcodec_configuration());
return (*env)->NewStringUTF(env, info);
}