public class CcjPlayer {
	//视频
	public native void render(String input,Object surface);
	//音频
	public native void sound(String input,String output);
	
	//注意加载库的顺序
	static{
		System.loadLibrary("avutil-54");
		System.loadLibrary("swresample-1");
		System.loadLibrary("avcodec-56");
		System.loadLibrary("avformat-56");
		System.loadLibrary("swscale-3");
		System.loadLibrary("postproc-53");
		System.loadLibrary("avfilter-5");
		System.loadLibrary("avdevice-56");
		System.loadLibrary("myffmpeg");
	}
}

/*
 * Class:     com_ccj_ffmpeg_CcjPlayer
 * Method:    render
 * Signature: (Ljava/lang/String;Ljava/lang/Object;)V
 */
JNIEXPORT void JNICALL Java_com_ccj_ffmpeg_CcjPlayer_render
(JNIEnv *env, jobject jobj, jstring input_jstr, jobject surface){
	const char* input_cstr = (*env)->GetStringUTFChars(env,input_jstr,NULL);
	//1.注册组件
	av_register_all();

	//封装格式上下文
	AVFormatContext *pFormatCtx = avformat_alloc_context();

	//2.打开输入视频文件
	if(avformat_open_input(&pFormatCtx,input_cstr,NULL,NULL) != 0){
		LOGE("%s","打开输入视频文件失败");
		return;
	}
	//3.获取视频信息
	if(avformat_find_stream_info(pFormatCtx,NULL) < 0){
		LOGE("%s","获取视频信息失败");
		return;
	}

	//视频解码，需要找到视频对应的AVStream所在pFormatCtx->streams的索引位置
	int video_stream_idx = -1;
	int i = 0;
	for(; i < pFormatCtx->nb_streams;i++){
		//根据类型判断，是否是视频流
		if(pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO){
			video_stream_idx = i;
			break;
		}
	}

	//4.获取视频解码器
	AVCodecContext *pCodeCtx = pFormatCtx->streams[video_stream_idx]->codec;
	AVCodec *pCodec = avcodec_find_decoder(pCodeCtx->codec_id);
	if(pCodec == NULL){
		LOGE("%s","无法解码");
		return;
	}

	//5.打开解码器
	if(avcodec_open2(pCodeCtx,pCodec,NULL) < 0){
		LOGE("%s","解码器无法打开");
		return;
	}

	//编码数据
	AVPacket *packet = (AVPacket *)av_malloc(sizeof(AVPacket));

	//像素数据（解码数据）
	AVFrame *yuv_frame = av_frame_alloc();
	AVFrame *rgb_frame = av_frame_alloc();

	/*//ScaleImg視頻縮放
	if(ScaleImg(pCodeCtx,yuv_frame,rgb_frame,pCodeCtx->width/6,pCodeCtx->width/6)!=1){
		LOGE("%s","縮放失敗");
		return;
	}*/

	//native绘制
	//窗体

	ANativeWindow* nativeWindow = ANativeWindow_fromSurface(env,surface);

	//绘制时的缓冲区
	ANativeWindow_Buffer outBuffer;

	int len ,got_frame, framecount = 0;
	//6.一阵一阵读取压缩的视频数据AVPacket
	while(av_read_frame(pFormatCtx,packet) >= 0){
		//解码AVPacket->AVFrame
		len = avcodec_decode_video2(pCodeCtx, yuv_frame, &got_frame, packet);

		//Zero if no frame could be decompressed
		//非零，正在解码
		if(got_frame){
			LOGI("解码%d帧",framecount++);
			//lock
			//设置缓冲区的属性（宽、高、像素格式）
			ANativeWindow_setBuffersGeometry(nativeWindow, pCodeCtx->width, pCodeCtx->height,WINDOW_FORMAT_RGBA_8888);
			ANativeWindow_lock(nativeWindow,&outBuffer,NULL);

			//设置rgb_frame的属性（像素格式、宽高）和缓冲区
			//rgb_frame缓冲区与outBuffer.bits是同一块内存
			avpicture_fill((AVPicture *)rgb_frame, outBuffer.bits, AV_PIX_FMT_RGBA, pCodeCtx->width, pCodeCtx->height);

			//YUV->RGBA_8888
			I420ToARGB(yuv_frame->data[0],yuv_frame->linesize[0],
					yuv_frame->data[2],yuv_frame->linesize[2],
					yuv_frame->data[1],yuv_frame->linesize[1],
					rgb_frame->data[0], rgb_frame->linesize[0],
					pCodeCtx->width,pCodeCtx->height);

			//unlock
			ANativeWindow_unlockAndPost(nativeWindow);

			usleep(1000 * 16);

		}

		av_free_packet(packet);
	}

	ANativeWindow_release(nativeWindow);
	av_frame_free(&yuv_frame);
	avcodec_close(pCodeCtx);
	avformat_free_context(pFormatCtx);

	(*env)->ReleaseStringUTFChars(env,input_jstr,input_cstr);
}

/**
 * 万能解码器,播放视频器
 * @author ccj
 *
 */
public class MainActivity extends Activity {

	private CcjPlayer player;
	private VideoView videoView;
	private Spinner sp_video;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		videoView = (VideoView) findViewById(R.id.video_view);
		sp_video = (Spinner) findViewById(R.id.sp_video);
		player = new CcjPlayer();
		//选择 <item>input.mp4</item> <item>音频</item>
		String[] videoArray = getResources().getStringArray(R.array.video_list);
		ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, 
				android.R.layout.simple_list_item_1, 
				android.R.id.text1, videoArray);
		sp_video.setAdapter(adapter);
	}

	public void mPlay(View btn){
		String video = sp_video.getSelectedItem().toString();
		if("音频".equals(video)){
			String input = new File(Environment.getExternalStorageDirectory(),"Live.mp3").getAbsolutePath();
			String output = new File(Environment.getExternalStorageDirectory(),"Live.pcm").getAbsolutePath();
			player.sound(input, output);
			
		}else{
			String input = new File(Environment.getExternalStorageDirectory(),video).getAbsolutePath();
			//Surface传入到Native函数中，用于绘制
			Surface surface = videoView.getHolder().getSurface();
			player.render(input, surface);
			
		}
		
	}
	
	
}