android视频旋转处理方法
/*
* Copyright (C) 2013 yixia.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.vov.vitamio.demo;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Matrix;
import android.graphics.SurfaceTexture;
import android.media.AudioManager;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.Surface;
import android.view.TextureView;
import android.widget.Toast;
import io.vov.vitamio.LibsChecker;
import io.vov.vitamio.MediaPlayer;
import io.vov.vitamio.MediaPlayer.OnBufferingUpdateListener;
import io.vov.vitamio.MediaPlayer.OnCompletionListener;
import io.vov.vitamio.MediaPlayer.OnPreparedListener;
@SuppressLint("NewApi")
public class MediaPlayerDemo_setSurface extends Activity implements OnBufferingUpdateListener,
OnCompletionListener, OnPreparedListener, TextureView.SurfaceTextureListener {
private static final String TAG = "MediaPlayerDemo";
private int mVideoWidth;
private int mVideoHeight;
private MediaPlayer mMediaPlayer;
private TextureView mTextureView;
private String path;
private Surface surf;
private boolean mIsVideoSizeKnown = false;
private boolean mIsVideoReadyToBePlayed = false;
/**
*
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
if (!LibsChecker.checkVitamioLibs(this))
return;
setContentView(R.layout.mediaplayer_3);
mTextureView = (TextureView) findViewById(R.id.surface);
mTextureView.setSurfaceTextureListener(this);
mTextureView.setRotation(90);
}
@SuppressLint("NewApi")
private void playVideo(SurfaceTexture surfaceTexture) {
doCleanUp();
try {
path = Environment.getExternalStorageDirectory()+"/"+"1.mp4";
if (path == "") {
// Tell the user to provide a media file URL.
Toast.makeText(
MediaPlayerDemo_setSurface.this,
"Please edit MediaPlayerDemo_setSurface Activity, "
+ "and set the path variable to your media file path."
+ " Your media file must be stored on sdcard.", Toast.LENGTH_LONG).show();
return;
}
// Create a new media player and set the listeners
mMediaPlayer = new MediaPlayer(this, true);
mMediaPlayer.setDataSource(path);
if (surf == null) {
surf = new Surface (surfaceTexture);
}
mMediaPlayer.setSurface(surf);
mMediaPlayer.prepareAsync();
mMediaPlayer.setOnBufferingUpdateListener(this);
mMediaPlayer.setOnCompletionListener(this);
mMediaPlayer.setOnPreparedListener(this);
setVolumeControlStream(AudioManager.STREAM_MUSIC);
} catch (Exception e) {
Log.e(TAG, "error: " + e.getMessage(), e);
}
}
public void onBufferingUpdate(MediaPlayer arg0, int percent) {
// Log.d(TAG, "onBufferingUpdate percent:" + percent);
}
public void onCompletion(MediaPlayer arg0) {
Log.d(TAG, "onCompletion called");
}
public void onPrepared(MediaPlayer mediaplayer) {
Log.d(TAG, "onPrepared called");
mIsVideoReadyToBePlayed = true;
if (mIsVideoReadyToBePlayed) {
startVideoPlayback();
}
}
@Override
protected void onPause() {
super.onPause();
releaseMediaPlayer();
doCleanUp();
}
@Override
protected void onDestroy() {
super.onDestroy();
releaseMediaPlayer();
doCleanUp();
}
private void releaseMediaPlayer() {
if (mMediaPlayer != null) {
mMediaPlayer.release();
mMediaPlayer = null;
}
}
private void doCleanUp() {
mVideoWidth = 0;
mVideoHeight = 0;
mIsVideoReadyToBePlayed = false;
mIsVideoSizeKnown = false;
}
private void startVideoPlayback() {
Log.v(TAG, "startVideoPlayback");
adjustAspectRatio(mMediaPlayer.getVideoWidth(), mMediaPlayer.getVideoHeight());
mMediaPlayer.start();
}
/**
* Sets the TextureView transform to preserve the aspect ratio of the video.
*/
private void adjustAspectRatio(int videoWidth, int videoHeight) {
int viewWidth = mTextureView.getWidth();
int viewHeight = mTextureView.getHeight();
double aspectRatio = (double) videoHeight / videoWidth;
int newWidth, newHeight;
if (viewHeight > (int) (viewWidth * aspectRatio)) {
// limited by narrow width; restrict height
newWidth = viewWidth;
newHeight = (int) (viewWidth * aspectRatio);
} else {
// limited by short height; restrict width
newWidth = (int) (viewHeight / aspectRatio);
newHeight = viewHeight;
}
int xoff = (viewWidth - newWidth) / 2;
int yoff = (viewHeight - newHeight) / 2;
Log.v(TAG, "video=" + videoWidth + "x" + videoHeight + " view=" + viewWidth + "x" + viewHeight
+ " newView=" + newWidth + "x" + newHeight + " off=" + xoff + "," + yoff);
Matrix txform = new Matrix();
mTextureView.getTransform(txform);
txform.setScale((float) newWidth / viewWidth, (float) newHeight / viewHeight);
//txform.postRotate(10); // just for fun
txform.postTranslate(xoff, yoff);
mTextureView.setTransform(txform);
}
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
playVideo(surface);
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
return false;
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
}
}
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TextureView类的介绍。http://www.bubuko.com/infodetail-656030.html
更新后的代码
/*
* Copyright (C) 2013 yixia.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.vov.vitamio.demo;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Matrix;
import android.graphics.SurfaceTexture;
import android.media.AudioManager;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.Surface;
import android.view.TextureView;
import android.widget.Toast;
import io.vov.vitamio.LibsChecker;
import io.vov.vitamio.MediaPlayer;
import io.vov.vitamio.MediaPlayer.OnBufferingUpdateListener;
import io.vov.vitamio.MediaPlayer.OnCompletionListener;
import io.vov.vitamio.MediaPlayer.OnPreparedListener;
@SuppressLint("NewApi")
public class MediaPlayerDemo_setSurface extends Activity implements OnBufferingUpdateListener,
OnCompletionListener, OnPreparedListener, TextureView.SurfaceTextureListener {
private static final String TAG = "MediaPlayerDemo";
private int mVideoWidth;
private int mVideoHeight;
private MediaPlayer mMediaPlayer;
private TextureView mTextureView;
private String path;
private Surface surf;
private boolean mIsVideoSizeKnown = false;
private boolean mIsVideoReadyToBePlayed = false;
/**
*
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
if (!LibsChecker.checkVitamioLibs(this))
return;
setContentView(R.layout.mediaplayer_3);
mTextureView = (TextureView) findViewById(R.id.surface);
mTextureView.setSurfaceTextureListener(this);
mTextureView.setRotation(90);
mTextureView.setScaleX(1280f/720);
mTextureView.setScaleY(720f/1280);
}
@SuppressLint("NewApi")
private void playVideo(SurfaceTexture surfaceTexture) {
doCleanUp();
try {
path = Environment.getExternalStorageDirectory()+"/"+"1.mp4";
if (path == "") {
// Tell the user to provide a media file URL.
Toast.makeText(
MediaPlayerDemo_setSurface.this,
"Please edit MediaPlayerDemo_setSurface Activity, "
+ "and set the path variable to your media file path."
+ " Your media file must be stored on sdcard.", Toast.LENGTH_LONG).show();
return;
}
// Create a new media player and set the listeners
mMediaPlayer = new MediaPlayer(this, true);
mMediaPlayer.setDataSource(path);
if (surf == null) {
surf = new Surface (surfaceTexture);
}
mMediaPlayer.setSurface(surf);
mMediaPlayer.prepareAsync();
mMediaPlayer.setOnBufferingUpdateListener(this);
mMediaPlayer.setOnCompletionListener(this);
mMediaPlayer.setOnPreparedListener(this);
setVolumeControlStream(AudioManager.STREAM_MUSIC);
} catch (Exception e) {
Log.e(TAG, "error: " + e.getMessage(), e);
}
}
public void onBufferingUpdate(MediaPlayer arg0, int percent) {
// Log.d(TAG, "onBufferingUpdate percent:" + percent);
}
public void onCompletion(MediaPlayer arg0) {
Log.d(TAG, "onCompletion called");
}
public void onPrepared(MediaPlayer mediaplayer) {
Log.d(TAG, "onPrepared called");
mIsVideoReadyToBePlayed = true;
if (mIsVideoReadyToBePlayed) {
startVideoPlayback();
}
}
@Override
protected void onPause() {
super.onPause();
releaseMediaPlayer();
doCleanUp();
}
@Override
protected void onDestroy() {
super.onDestroy();
releaseMediaPlayer();
doCleanUp();
}
private void releaseMediaPlayer() {
if (mMediaPlayer != null) {
mMediaPlayer.release();
mMediaPlayer = null;
}
}
private void doCleanUp() {
mVideoWidth = 0;
mVideoHeight = 0;
mIsVideoReadyToBePlayed = false;
mIsVideoSizeKnown = false;
}
private void startVideoPlayback() {
Log.v(TAG, "startVideoPlayback");
mMediaPlayer.start();
}
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
playVideo(surface);
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
return false;
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
}
}
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