SurfaceTextureTarget.java revision 2f708ce9cc7fc2e4d498bcc20a095bdf8e9c803d
1/* 2 * Copyright (C) 2011 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 18package android.filterpacks.videosrc; 19 20import android.filterfw.core.Filter; 21import android.filterfw.core.FilterContext; 22import android.filterfw.core.FilterSurfaceView; 23import android.filterfw.core.Frame; 24import android.filterfw.core.FrameFormat; 25import android.filterfw.core.GenerateFieldPort; 26import android.filterfw.core.GenerateFinalPort; 27import android.filterfw.core.GLEnvironment; 28import android.filterfw.core.GLFrame; 29import android.filterfw.core.KeyValueMap; 30import android.filterfw.core.MutableFrameFormat; 31import android.filterfw.core.NativeProgram; 32import android.filterfw.core.NativeFrame; 33import android.filterfw.core.Program; 34import android.filterfw.core.ShaderProgram; 35import android.filterfw.format.ImageFormat; 36 37import android.filterfw.geometry.Quad; 38import android.filterfw.geometry.Point; 39 40import android.view.Surface; 41import android.view.SurfaceHolder; 42import android.view.SurfaceView; 43 44import android.graphics.Rect; 45import android.graphics.SurfaceTexture; 46 47import android.util.Log; 48 49/** 50 * @hide 51 */ 52public class SurfaceTextureTarget extends Filter { 53 54 private final int RENDERMODE_STRETCH = 0; 55 private final int RENDERMODE_FIT = 1; 56 private final int RENDERMODE_FILL_CROP = 2; 57 private final int RENDERMODE_CUSTOMIZE = 3; 58 59 /** Required. Sets the destination surfaceTexture. 60 */ 61 @GenerateFinalPort(name = "surfaceTexture") 62 private SurfaceTexture mSurfaceTexture; 63 64 /** Required. Sets the width of the output surfaceTexture images */ 65 @GenerateFinalPort(name = "width") 66 private int mScreenWidth; 67 68 /** Required. Sets the height of the output surfaceTexture images */ 69 @GenerateFinalPort(name = "height") 70 private int mScreenHeight; 71 72 73 /** Optional. Control how the incoming frames are rendered onto the 74 * output. Default is FIT. 75 * RENDERMODE_STRETCH: Just fill the output surfaceView. 76 * RENDERMODE_FIT: Keep aspect ratio and fit without cropping. May 77 * have black bars. 78 * RENDERMODE_FILL_CROP: Keep aspect ratio and fit without black 79 * bars. May crop. 80 */ 81 @GenerateFieldPort(name = "renderMode", hasDefault = true) 82 private String mRenderModeString; 83 84 @GenerateFieldPort(name = "sourceQuad", hasDefault = true) 85 private Quad mSourceQuad = new Quad(new Point(0.0f, 1.0f), 86 new Point(1.0f, 1.0f), 87 new Point(0.0f, 0.0f), 88 new Point(1.0f, 0.0f)); 89 90 @GenerateFieldPort(name = "targetQuad", hasDefault = true) 91 private Quad mTargetQuad = new Quad(new Point(0.0f, 0.0f), 92 new Point(1.0f, 0.0f), 93 new Point(0.0f, 1.0f), 94 new Point(1.0f, 1.0f)); 95 96 private int mSurfaceId; 97 98 private ShaderProgram mProgram; 99 private GLFrame mScreen; 100 private int mRenderMode = RENDERMODE_FIT; 101 private float mAspectRatio = 1.f; 102 103 private boolean mLogVerbose; 104 private static final String TAG = "SurfaceTextureTarget"; 105 106 public SurfaceTextureTarget(String name) { 107 super(name); 108 109 mLogVerbose = Log.isLoggable(TAG, Log.VERBOSE); 110 } 111 112 @Override 113 public void setupPorts() { 114 // Make sure we have a SurfaceView 115 if (mSurfaceTexture == null) { 116 throw new RuntimeException("Null SurfaceTexture passed to SurfaceTextureTarget"); 117 } 118 119 // Add input port - will accept anything that's 4-channel. 120 addMaskedInputPort("frame", ImageFormat.create(ImageFormat.COLORSPACE_RGBA)); 121 } 122 123 public void updateRenderMode() { 124 if (mRenderModeString != null) { 125 if (mRenderModeString.equals("stretch")) { 126 mRenderMode = RENDERMODE_STRETCH; 127 } else if (mRenderModeString.equals("fit")) { 128 mRenderMode = RENDERMODE_FIT; 129 } else if (mRenderModeString.equals("fill_crop")) { 130 mRenderMode = RENDERMODE_FILL_CROP; 131 } else if (mRenderModeString.equals("customize")) { 132 mRenderMode = RENDERMODE_CUSTOMIZE; 133 } else { 134 throw new RuntimeException("Unknown render mode '" + mRenderModeString + "'!"); 135 } 136 } 137 updateTargetRect(); 138 } 139 140 @Override 141 public void prepare(FilterContext context) { 142 // Create identity shader to render, and make sure to render upside-down, as textures 143 // are stored internally bottom-to-top. 144 mProgram = ShaderProgram.createIdentity(context); 145 mProgram.setSourceRect(0, 1, 1, -1); 146 mProgram.setClearColor(0.0f, 0.0f, 0.0f); 147 148 updateRenderMode(); 149 150 // Create a frame representing the screen 151 MutableFrameFormat screenFormat = new MutableFrameFormat(FrameFormat.TYPE_BYTE, 152 FrameFormat.TARGET_GPU); 153 screenFormat.setBytesPerSample(4); 154 screenFormat.setDimensions(mScreenWidth, mScreenHeight); 155 mScreen = (GLFrame)context.getFrameManager().newBoundFrame(screenFormat, 156 GLFrame.EXISTING_FBO_BINDING, 157 0); 158 } 159 160 @Override 161 public void open(FilterContext context) { 162 // Set up SurfaceTexture internals 163 mSurfaceId = context.getGLEnvironment().registerSurfaceTexture( 164 mSurfaceTexture, mScreenWidth, mScreenHeight); 165 if (mSurfaceId <= 0) { 166 throw new RuntimeException("Could not register SurfaceTexture: " + mSurfaceTexture); 167 } 168 } 169 170 171 @Override 172 public void close(FilterContext context) { 173 if (mSurfaceId > 0) { 174 context.getGLEnvironment().unregisterSurfaceId(mSurfaceId); 175 } 176 } 177 178 179 @Override 180 public void process(FilterContext context) { 181 if (mLogVerbose) Log.v(TAG, "Starting frame processing"); 182 183 GLEnvironment glEnv = context.getGLEnvironment(); 184 185 // Get input frame 186 Frame input = pullInput("frame"); 187 boolean createdFrame = false; 188 189 float currentAspectRatio = 190 (float)input.getFormat().getWidth() / input.getFormat().getHeight(); 191 if (currentAspectRatio != mAspectRatio) { 192 if (mLogVerbose) Log.v(TAG, "New aspect ratio: " + currentAspectRatio + 193 ", previously: " + mAspectRatio); 194 mAspectRatio = currentAspectRatio; 195 updateTargetRect(); 196 } 197 198 // See if we need to copy to GPU 199 Frame gpuFrame = null; 200 if (mLogVerbose) Log.v("SurfaceTextureTarget", "Got input format: " + input.getFormat()); 201 202 int target = input.getFormat().getTarget(); 203 if (target != FrameFormat.TARGET_GPU) { 204 gpuFrame = context.getFrameManager().duplicateFrameToTarget(input, 205 FrameFormat.TARGET_GPU); 206 createdFrame = true; 207 } else { 208 gpuFrame = input; 209 } 210 211 // Activate our surface 212 glEnv.activateSurfaceWithId(mSurfaceId); 213 214 // Process 215 mProgram.process(gpuFrame, mScreen); 216 217 glEnv.setSurfaceTimestamp(input.getTimestamp()); 218 219 // And swap buffers 220 glEnv.swapBuffers(); 221 222 if (createdFrame) { 223 gpuFrame.release(); 224 } 225 } 226 227 @Override 228 public void fieldPortValueUpdated(String name, FilterContext context) { 229 updateRenderMode(); 230 } 231 232 @Override 233 public void tearDown(FilterContext context) { 234 if (mScreen != null) { 235 mScreen.release(); 236 } 237 } 238 239 private void updateTargetRect() { 240 if (mScreenWidth > 0 && mScreenHeight > 0 && mProgram != null) { 241 float screenAspectRatio = (float)mScreenWidth / mScreenHeight; 242 float relativeAspectRatio = screenAspectRatio / mAspectRatio; 243 244 if (relativeAspectRatio == 1.0f && mRenderMode != RENDERMODE_CUSTOMIZE) { 245 mProgram.setClearsOutput(false); 246 } else { 247 switch (mRenderMode) { 248 case RENDERMODE_STRETCH: 249 mProgram.setTargetRect(0, 0, 1, 1); 250 mTargetQuad.p0.set(0f, 0.0f); 251 mTargetQuad.p1.set(1f, 0.0f); 252 mTargetQuad.p2.set(0f, 1.0f); 253 mTargetQuad.p3.set(1f, 1.0f); 254 mProgram.setClearsOutput(false); 255 break; 256 case RENDERMODE_FIT: 257 if (relativeAspectRatio > 1.0f) { 258 // Screen is wider than the camera, scale down X 259 mTargetQuad.p0.set(0.5f - 0.5f / relativeAspectRatio, 0.0f); 260 mTargetQuad.p1.set(0.5f + 0.5f / relativeAspectRatio, 0.0f); 261 mTargetQuad.p2.set(0.5f - 0.5f / relativeAspectRatio, 1.0f); 262 mTargetQuad.p3.set(0.5f + 0.5f / relativeAspectRatio, 1.0f); 263 264 } else { 265 // Screen is taller than the camera, scale down Y 266 mTargetQuad.p0.set(0.0f, 0.5f - 0.5f * relativeAspectRatio); 267 mTargetQuad.p1.set(1.0f, 0.5f - 0.5f * relativeAspectRatio); 268 mTargetQuad.p2.set(0.0f, 0.5f + 0.5f * relativeAspectRatio); 269 mTargetQuad.p3.set(1.0f, 0.5f + 0.5f * relativeAspectRatio); 270 } 271 mProgram.setClearsOutput(true); 272 break; 273 case RENDERMODE_FILL_CROP: 274 if (relativeAspectRatio > 1) { 275 // Screen is wider than the camera, crop in Y 276 mTargetQuad.p0.set(0.0f, 0.5f - 0.5f * relativeAspectRatio); 277 mTargetQuad.p1.set(1.0f, 0.5f - 0.5f * relativeAspectRatio); 278 mTargetQuad.p2.set(0.0f, 0.5f + 0.5f * relativeAspectRatio); 279 mTargetQuad.p3.set(1.0f, 0.5f + 0.5f * relativeAspectRatio); 280 } else { 281 // Screen is taller than the camera, crop in X 282 mTargetQuad.p0.set(0.5f - 0.5f / relativeAspectRatio, 0.0f); 283 mTargetQuad.p1.set(0.5f + 0.5f / relativeAspectRatio, 0.0f); 284 mTargetQuad.p2.set(0.5f - 0.5f / relativeAspectRatio, 1.0f); 285 mTargetQuad.p3.set(0.5f + 0.5f / relativeAspectRatio, 1.0f); 286 } 287 mProgram.setClearsOutput(true); 288 break; 289 case RENDERMODE_CUSTOMIZE: 290 ((ShaderProgram) mProgram).setSourceRegion(mSourceQuad); 291 break; 292 } 293 ((ShaderProgram) mProgram).setTargetRegion(mTargetQuad); 294 } 295 } 296 } 297} 298