Android ffmpeg rtmp（source code）

souce code:

Android.mk

　　编译生成APK需要调用的so文件

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE:= libavcodec
LOCAL_SRC_FILES:= lib/libavcodec-57.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE:= libavformat
LOCAL_SRC_FILES:= lib/libavformat-57.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE:= libswscale
LOCAL_SRC_FILES:= lib/libswscale-4.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE:= libavutil
LOCAL_SRC_FILES:= lib/libavutil-55.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE:= libavfilter
LOCAL_SRC_FILES:= lib/libavfilter-6.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE:= libswresample
LOCAL_SRC_FILES:= lib/libswresample-2.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

#Program
include $(CLEAR_VARS)
#LOCAL_ALLOW_UNDEFINED_SYMBOLS := true
LOCAL_MODULE := hello
LOCAL_SRC_FILES := main.c
LOCAL_C_INCLUDES += $(LOCAL_PATH)/include
LOCAL_LDLIBS := -llog -lz
LOCAL_SHARED_LIBRARIES :=avcodec avdevice avfilter avformat avutil postproc swresample swscaleinclude $(BUILD_SHARED_LIBRARY)

C语言实现文件
　　编写C、C++文件实现底层的逻辑功能，最终编译为so文件被java调用

#include <jni.h>
#include <stdio.h>
#include "include/libavcodec/avcodec.h"
#include "include/libavformat/avformat.h"
#include "include/libavfilter/avfilter.h"

jstring JNICALL Java_com_example_zhaohu_test_MainActivity_stringFromJNI
  (JNIEnv *env, jobject jObj)
  {
      char info[1000]= { 0 };
      AVFormatContext* pFormatCtx = NULL;
      av_register_all();
      avformat_network_init();
      pFormatCtx = avformat_alloc_context();
      //char* url="/storage/emulated/0/1.mp4";
      char* url="rtmp://live.hkstv.hk.lxdns.com/live/hks";

//      if(avformat_open_input(&pFormatCtx,url,NULL,NULL) != 0)
//      {
//          return (*env)->NewStringUTF(env,"open url failed!");
//      }
      int ret = avformat_open_input(&pFormatCtx,url,NULL,NULL);
      //char buf[1024] = { 0 };
      //av_strerror(ret,buf,1024);
      //sprintf(info,"Couldn't open file %s: %d(%s)
",url,ret,buf);
      //return (*env)->NewStringUTF(env,info);

      if(!pFormatCtx)
          return (*env)->NewStringUTF(env,"pFormat is NULL!");

      if(avformat_find_stream_info(pFormatCtx,NULL) < 0)
      {
          return (*env)->NewStringUTF(env,"Did not find info");
      }
      int videoIndex = -1;
      int i;
      for (i = 0; i <pFormatCtx->nb_streams ; ++i)
      {
        if(pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
        {
            videoIndex = i;
            break;
        }
      }
      if(videoIndex == -1)
      {
          return (*env)->NewStringUTF(env,"Did not find video steam!");
      }

      AVCodecContext* pCodecCtx = pFormatCtx->streams[videoIndex]->codec;
      AVCodec* pCodec = avcodec_find_decoder(pCodecCtx->codec_id);

      if(pCodec == NULL)
          return (*env)->NewStringUTF(env,"Did not find video decoder");

      if(avcodec_open2(pCodecCtx,pCodec,NULL) < 0)
      {
          return (*env)->NewStringUTF(env,"avcodec_open2 failed!");
      }


      //sprintf(info,"%s
",avcodec_configuration());
      sprintf(info,"[Input:] %s
",url);
      sprintf(info,"%s[Format:] %s
",info,pFormatCtx->iformat->name);
      sprintf(info,"%s[codec:] %s
",info,pCodecCtx->codec->name);
      sprintf(info,"%s[Resolution:] %dx%d
",info,pCodecCtx->width,pCodecCtx->height);
     return (*env)->NewStringUTF(env,info);
  }

/*
 * Class:     com_example_zhaohu_test_MainActivity
 * Method:    unimplementedStringFromJNI
 * Signature: ()Ljava/lang/String;
 */
jstring JNICALL Java_com_example_zhaohu_test_MainActivity_unimplementedStringFromJNI
  (JNIEnv *env, jobject jObj)
  {
    return (*env)->NewStringUTF(env,"Java_com_example_zhaohu_test_MainActivity_unimplementedStringFromJNI");
  }

实现Android代码

　　调用C，C++的实现文件

package com.example.zhaohu.test;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final TextView infoText = (TextView)findViewById(R.id.info);
        //infoText.setText("This is My Test");

        infoText.setText(stringFromJNI());
    }

    public native String  stringFromJNI();
    public native String  unimplementedStringFromJNI();
    static {
        System.loadLibrary("avcodec-57");
        System.loadLibrary("avfilter-6");
        System.loadLibrary("avformat-57");
        System.loadLibrary("avutil-55");
        System.loadLibrary("swresample-2");
        System.loadLibrary("swscale-4");
        System.loadLibrary("hello");

    }
}