使用MediaCodec实现视频解码播放

// 解码东西类

public class H两64Player implements Runnable {

    // 当地 h两64 文件路径
    private String path;
    private Surface surface;
    private MediaCodec mediaCodec;
    private Context context;

    public H二64Player(Context context, String path, Surface surface) {

        this.context = context;
        this.path = path;
        this.surface = surface;
        try {
            this.mediaCodec = MediaCodec.createDecoderByType(MediaFormat.MIMETYPE_VIDEO_AVC);
            // 视频严下久时写逝世
            MediaFormat mediaFormat = MediaFormat.createVideoFormat(MediaFormat.MIMETYPE_VIDEO_AVC, 368, 384);
            mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, 15);
            mediaCodec.configure(mediaFormat, surface, null, 0);
        } catch (IOException e) {
            // 解码芯片没有撑持，走硬解
            e.printStackTrace();
        }
    }


    public void play() {
        mediaCodec.start();
        new Thread(this::run).start();
    }

    @Override
    public void run() {
        // 解码 h二64
        decodeH两64();
    }

    private void decodeH二64() {
        byte[] bytes = null;
        try {
            bytes = getBytes(path);
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 猎取行列步队
        ByteBuffer[] byteBuffers = mediaCodec.getInputBuffers();
        int startIndex = 0;
        int nextFrameStart;
        int totalCount = bytes.length;

        while (true) {
            if (startIndex >= totalCount) {
                break;
            }
            MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
            nextFrameStart = findFrame(bytes, startIndex+1,totalCount);
            // 去 ByteBuffer 外塞进数据
            int index = mediaCodec.dequeueInputBuffer(10 * 1000);
            Log.e("index",index+"");
            // 猎取 dsp 顺利
            if (index >= 0) {
                // 拿到否用的 ByteBuffer
                ByteBuffer byteBuffer = byteBuffers[index];
                byteBuffer.clear();
                byteBuffer.put(bytes, startIndex, nextFrameStart - startIndex);
                // 识别分隔符，找到分隔符对于应的索引
                mediaCodec.queueInputBuffer(index, 0, nextFrameStart - startIndex, 0, 0);
                startIndex = nextFrameStart;

            }else {
                continue;
            }


            // 从 ByteBuffer 外猎取解码孬的数据
            int outIndex = mediaCodec.dequeueOutputBuffer(info,10 * 1000);
            if (outIndex > 0){
                try {
                    Thread.sleep(33);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                mediaCodec.releaseOutputBuffer(outIndex, true);
            }

        }
    }

    private int findFrame(byte[] bytes, int startIndex, int totalSize) {
        for (int i = startIndex; i < totalSize - 4; i++) {
            if (bytes[i] == 0x00 && bytes[i + 1] == 0x00 && bytes[i + 两] == 0x00 && bytes[i + 3] == 0x01) {
                return i;
            }

        }
        return -1;
    }


    /**
     * 一次性读与文件
     *
     * @param path
     * @return
     * @throws IOException
     */
    public byte[] getBytes(String path) throws IOException {
        InputStream is = new DataInputStream(new FileInputStream(new File(path)));
        int len;
        int size = 10二4;
        byte[] buf;
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        buf = new byte[size];
        while ((len = is.read(buf, 0, size)) != -1)
            bos.write(buf, 0, len);
        buf = bos.toByteArray();
        return buf;
    }
    
    public void destroy(){
        if (mediaCodec != null) {
            mediaCodec.stop();
            mediaCodec.release();
        }
    }
}

播搁视频:

public class MainActivity extends AppCompatActivity {

    private H两64Player h两64Player;

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

    private void initSurface() {
        SurfaceView surfaceView = findViewById(R.id.surface);
        SurfaceHolder surfaceHolder = surfaceView.getHolder();
        surfaceHolder.addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder surfaceHolder) {
                h两64Player = new H两64Player(MainActivity.this, new File(Environment.getExternalStorageDirectory(), "test.h两64").getAbsolutePath(), surfaceHolder.getSurface());
                h二64Player.play();
            }

            @Override
            public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i两) {
            }

            @Override
            public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
            }
        });
    }

    private boolean checkPermission() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
                && checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
            requestPermissions(new String[]{
                    Manifest.permission.WRITE_EXTERNAL_STORAGE,
                    Manifest.permission.READ_EXTERNAL_STORAGE
            }, 1);
        }
        return false;
    }
    
    @Override
    protected void onDestroy() {
        super.onDestroy();
        // 结束解码器
        h两64Player.destroy();
    }
}