1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.example.android.basicmediadecoder; 18 19 20 import android.animation.TimeAnimator; 21 import android.app.Activity; 22 import android.media.MediaCodec; 23 import android.media.MediaExtractor; 24 import android.net.Uri; 25 import android.os.Bundle; 26 import android.view.Menu; 27 import android.view.MenuInflater; 28 import android.view.MenuItem; 29 import android.view.Surface; 30 import android.view.TextureView; 31 import android.view.View; 32 import android.widget.TextView; 33 34 import com.example.android.common.media.MediaCodecWrapper; 35 36 import java.io.IOException; 37 38 /** 39 * This activity uses a {@link android.view.TextureView} to render the frames of a video decoded using 40 * {@link android.media.MediaCodec} API. 41 */ 42 public class MainActivity extends Activity { 43 44 private TextureView mPlaybackView; 45 private TimeAnimator mTimeAnimator = new TimeAnimator(); 46 47 // A utility that wraps up the underlying input and output buffer processing operations 48 // into an east to use API. 49 private MediaCodecWrapper mCodecWrapper; 50 private MediaExtractor mExtractor = new MediaExtractor(); 51 TextView mAttribView = null; 52 53 54 /** 55 * Called when the activity is first created. 56 */ 57 @Override 58 public void onCreate(Bundle savedInstanceState) { 59 super.onCreate(savedInstanceState); 60 setContentView(R.layout.sample_main); 61 mPlaybackView = (TextureView) findViewById(R.id.PlaybackView); 62 mAttribView = (TextView)findViewById(R.id.AttribView); 63 64 } 65 66 @Override 67 public boolean onCreateOptionsMenu(Menu menu) { 68 MenuInflater inflater = getMenuInflater(); 69 inflater.inflate(R.menu.action_menu, menu); 70 return true; 71 } 72 73 @Override 74 protected void onPause() { 75 super.onPause(); 76 if(mTimeAnimator != null && mTimeAnimator.isRunning()) { 77 mTimeAnimator.end(); 78 } 79 80 if (mCodecWrapper != null ) { 81 mCodecWrapper.stopAndRelease(); 82 mExtractor.release(); 83 } 84 } 85 86 @Override 87 public boolean onOptionsItemSelected(MenuItem item) { 88 if (item.getItemId() == R.id.menu_play) { 89 mAttribView.setVisibility(View.VISIBLE); 90 startPlayback(); 91 item.setEnabled(false); 92 } 93 return true; 94 } 95 96 97 public void startPlayback() { 98 99 // Construct a URI that points to the video resource that we want to play 100 Uri videoUri = Uri.parse("android.resource://" 101 + getPackageName() + "/" 102 + R.raw.vid_bigbuckbunny); 103 104 try { 105 106 // BEGIN_INCLUDE(initialize_extractor) 107 mExtractor.setDataSource(this, videoUri, null); 108 int nTracks = mExtractor.getTrackCount(); 109 110 // Begin by unselecting all of the tracks in the extractor, so we won't see 111 // any tracks that we haven't explicitly selected. 112 for (int i = 0; i < nTracks; ++i) { 113 mExtractor.unselectTrack(i); 114 } 115 116 117 // Find the first video track in the stream. In a real-world application 118 // it's possible that the stream would contain multiple tracks, but this 119 // sample assumes that we just want to play the first one. 120 for (int i = 0; i < nTracks; ++i) { 121 // Try to create a video codec for this track. This call will return null if the 122 // track is not a video track, or not a recognized video format. Once it returns 123 // a valid MediaCodecWrapper, we can break out of the loop. 124 mCodecWrapper = MediaCodecWrapper.fromVideoFormat(mExtractor.getTrackFormat(i), 125 new Surface(mPlaybackView.getSurfaceTexture())); 126 if (mCodecWrapper != null) { 127 mExtractor.selectTrack(i); 128 break; 129 } 130 } 131 // END_INCLUDE(initialize_extractor) 132 133 134 135 136 // By using a {@link TimeAnimator}, we can sync our media rendering commands with 137 // the system display frame rendering. The animator ticks as the {@link Choreographer} 138 // recieves VSYNC events. 139 mTimeAnimator.setTimeListener(new TimeAnimator.TimeListener() { 140 @Override 141 public void onTimeUpdate(final TimeAnimator animation, 142 final long totalTime, 143 final long deltaTime) { 144 145 boolean isEos = ((mExtractor.getSampleFlags() & MediaCodec 146 .BUFFER_FLAG_END_OF_STREAM) == MediaCodec.BUFFER_FLAG_END_OF_STREAM); 147 148 // BEGIN_INCLUDE(write_sample) 149 if (!isEos) { 150 // Try to submit the sample to the codec and if successful advance the 151 // extractor to the next available sample to read. 152 boolean result = mCodecWrapper.writeSample(mExtractor, false, 153 mExtractor.getSampleTime(), mExtractor.getSampleFlags()); 154 155 if (result) { 156 // Advancing the extractor is a blocking operation and it MUST be 157 // executed outside the main thread in real applications. 158 mExtractor.advance(); 159 } 160 } 161 // END_INCLUDE(write_sample) 162 163 // Examine the sample at the head of the queue to see if its ready to be 164 // rendered and is not zero sized End-of-Stream record. 165 MediaCodec.BufferInfo out_bufferInfo = new MediaCodec.BufferInfo(); 166 mCodecWrapper.peekSample(out_bufferInfo); 167 168 // BEGIN_INCLUDE(render_sample) 169 if (out_bufferInfo.size <= 0 && isEos) { 170 mTimeAnimator.end(); 171 mCodecWrapper.stopAndRelease(); 172 mExtractor.release(); 173 } else if (out_bufferInfo.presentationTimeUs / 1000 < totalTime) { 174 // Pop the sample off the queue and send it to {@link Surface} 175 mCodecWrapper.popSample(true); 176 } 177 // END_INCLUDE(render_sample) 178 179 } 180 }); 181 182 // We're all set. Kick off the animator to process buffers and render video frames as 183 // they become available 184 mTimeAnimator.start(); 185 } catch (IOException e) { 186 e.printStackTrace(); 187 } 188 } 189 } 190
