IjkPlayer的使用

一、概述IjkPlayer是b站开源的一块播放器，底层也是基于FFmpeg这个开源库，Ijk源码：https://github.com/Bilibili/ijkplayer.Ijkplayer-0.8.8支持rtsp、支持http、支持hls、支持rtmp、支持h265、支持arm64/armv7a。二、简单使用(demo:https://github.com/stormdzh/IjkPlayerDemo)1、引入依赖 implementation ‘tv.danmaku.ijk.media:ijkplayer-java:0.8.8’
implementation ‘tv.danmaku.ijk.media:ijkplayer-armv7a:0.8.8’
implementation ‘tv.danmaku.ijk.media:ijkplayer-exo:0.8.8’

## required, enough for most devices.
#compile ‘tv.danmaku.ijk.media:ijkplayer-java:0.8.8’
#compile ‘tv.danmaku.ijk.media:ijkplayer-armv7a:0.8.8’

## Other ABIs: optional
#compile ‘tv.danmaku.ijk.media:ijkplayer-armv5:0.8.8’
#compile ‘tv.danmaku.ijk.media:ijkplayer-arm64:0.8.8’
#compile ‘tv.danmaku.ijk.media:ijkplayer-x86:0.8.8’
#compile ‘tv.danmaku.ijk.media:ijkplayer-x86_64:0.8.8’

## ExoPlayer as IMediaPlayer: optional, experimental
#compile ‘tv.danmaku.ijk.media:ijkplayer-exo:0.8.8’
2、自定义一个播放器
ijkplayer提供的没有提供一个播放器控件给我们使用，所以我们自己定。主要是创建一个surfaceview，把它赋给IMediaPlayer。public class VideoPlayerIJK extends FrameLayout {

/**
* 由ijkplayer提供，用于播放视频，需要给他传入一个surfaceView
*/
private IMediaPlayer mMediaPlayer = null;

/**
* 视频文件地址
*/
private String mPath = “”;

private SurfaceView surfaceView;

private VideoPlayerListener listener;
private Context mContext;

public VideoPlayerIJK(@NonNull Context context) {
super(context);
initVideoView(context);
}

public VideoPlayerIJK(@NonNull Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
initVideoView(context);
}

public VideoPlayerIJK(@NonNull Context context, @Nullable AttributeSet attrs, @AttrRes int defStyleAttr) {
super(context, attrs, defStyleAttr);
initVideoView(context);
}

private void initVideoView(Context context) {
mContext = context;

//获取焦点，不知道有没有必要~。~
setFocusable(true);
}

/**
* 设置视频地址。
* 根据是否第一次播放视频，做不同的操作。
*
* @param path the path of the video.
*/
public void setVideoPath(String path) {
if (TextUtils.equals(“”, mPath)) {
//如果是第一次播放视频，那就创建一个新的surfaceView
mPath = path;
createSurfaceView();
} else {
//否则就直接load
mPath = path;
load();
}
}

/**
* 新建一个surfaceview
*/
private void createSurfaceView() {
//生成一个新的surface view
surfaceView = new SurfaceView(mContext);
surfaceView.getHolder().addCallback(new LmnSurfaceCallback());
LayoutParams layoutParams = new LayoutParams(LayoutParams.MATCH_PARENT
, LayoutParams.MATCH_PARENT, Gravity.CENTER);
surfaceView.setLayoutParams(layoutParams);
this.addView(surfaceView);
}

/**
* surfaceView的监听器
*/
private class LmnSurfaceCallback implements SurfaceHolder.Callback {
@Override
public void surfaceCreated(SurfaceHolder holder) {
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
//surfaceview创建成功后，加载视频
load();
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
}

/**
* 加载视频
*/
private void load() {
//每次都要重新创建IMediaPlayer
createPlayer();
try {
mMediaPlayer.setDataSource(mPath);
} catch (IOException e) {
e.printStackTrace();
}
//给mediaPlayer设置视图
mMediaPlayer.setDisplay(surfaceView.getHolder());

mMediaPlayer.prepareAsync();
}

/**
* 创建一个新的player
*/
private void createPlayer() {
if (mMediaPlayer != null) {
mMediaPlayer.stop();
mMediaPlayer.setDisplay(null);
mMediaPlayer.release();
}
IjkMediaPlayer ijkMediaPlayer = new IjkMediaPlayer();
ijkMediaPlayer.native_setLogLevel(IjkMediaPlayer.IJK_LOG_DEBUG);

// //开启硬解码
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, “mediacodec”, 1);

mMediaPlayer = ijkMediaPlayer;

if (listener != null) {
mMediaPlayer.setOnPreparedListener(listener);
mMediaPlayer.setOnInfoListener(listener);
mMediaPlayer.setOnSeekCompleteListener(listener);
mMediaPlayer.setOnBufferingUpdateListener(listener);
mMediaPlayer.setOnErrorListener(listener);
}
}

public void setListener(VideoPlayerListener listener) {
this.listener = listener;
if (mMediaPlayer != null) {
mMediaPlayer.setOnPreparedListener(listener);
}
}

/**
* ——-======——— 下面封装了一下控制视频的方法
*/

public void start() {
if (mMediaPlayer != null) {
mMediaPlayer.start();
}
}

public void release() {
if (mMediaPlayer != null) {
mMediaPlayer.reset();
mMediaPlayer.release();
mMediaPlayer = null;
}
}

public void pause() {
if (mMediaPlayer != null) {
mMediaPlayer.pause();
}
}

public void stop() {
if (mMediaPlayer != null) {
mMediaPlayer.stop();
}
}

public void reset() {
if (mMediaPlayer != null) {
mMediaPlayer.reset();
}
}

public long getDuration() {
if (mMediaPlayer != null) {
return mMediaPlayer.getDuration();
} else {
return 0;
}
}

public long getCurrentPosition() {
if (mMediaPlayer != null) {
return mMediaPlayer.getCurrentPosition();
} else {
return 0;
}
}

public void seekTo(long l) {
if (mMediaPlayer != null) {
mMediaPlayer.seekTo(l);
}
}
}
3、使用
添加控件到xml中<?xml version=”1.0″ encoding=”utf-8″?>

<com.stormdzh.ijkplayer.ijk.VideoPlayerIJK
android:id=”@+id/mVideoPlayerIJK”
android:layout_width=”match_parent”
android:layout_height=”300dp” />

Activity中测试public class MainActivity extends AppCompatActivity {

private VideoPlayerIJK mVideoPlayerIJK;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mVideoPlayerIJK = findViewById(R.id.mVideoPlayerIJK);
String videoPath = “http://v-cdn.zjol.com.cn/280443.mp4”;
mVideoPlayerIJK.setVideoPath(videoPath);
mVideoPlayerIJK.start();
}
}
编译https://blog.csdn.net/Xu_JL1997/article/details/104376417错误ff3.4–ijk0.8.7–20180103–001版本ffmpeg编译错误 ,参考：https://github.com/Bilibili/ijkplayer/issues/4093在module-default.sh增加：
export COMMON_FF_CFG_FLAGS=”$COMMON_FF_CFG_FLAGS –disable-linux-perf”
就可以编译通过了。
原因是：
libavcodec/hevc_mvs.c最终会include libavutil/timer.h文件
#if CONFIG_LINUX_PERF
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <unistd.h> // read(3)
#include <sys/ioctl.h>
#include <asm/unistd.h>
#include <linux/perf_event.h>
#endif
在sys/ioctl.h中最终会include asm/termbits .h文件
#define B0 0000000
所以在用B0作为变量或参数的地方，一般都会报错。
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