1 /* 2 * Copyright (C) 2014 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 package android.hardware.camera2.legacy; 17 18 import android.graphics.ImageFormat; 19 import android.graphics.RectF; 20 import android.graphics.SurfaceTexture; 21 import android.hardware.camera2.CameraCharacteristics; 22 import android.os.Environment; 23 import android.opengl.EGL14; 24 import android.opengl.EGLConfig; 25 import android.opengl.EGLContext; 26 import android.opengl.EGLDisplay; 27 import android.opengl.EGLSurface; 28 import android.opengl.GLES11Ext; 29 import android.opengl.GLES20; 30 import android.opengl.Matrix; 31 import android.text.format.Time; 32 import android.util.Log; 33 import android.util.Pair; 34 import android.util.Size; 35 import android.view.Surface; 36 import android.os.SystemProperties; 37 38 import java.io.File; 39 import java.nio.ByteBuffer; 40 import java.nio.ByteOrder; 41 import java.nio.FloatBuffer; 42 import java.util.ArrayList; 43 import java.util.Collection; 44 import java.util.List; 45 46 /** 47 * A renderer class that manages the GL state, and can draw a frame into a set of output 48 * {@link Surface}s. 49 */ 50 public class SurfaceTextureRenderer { 51 private static final String TAG = SurfaceTextureRenderer.class.getSimpleName(); 52 private static final boolean DEBUG = false; 53 private static final int EGL_RECORDABLE_ANDROID = 0x3142; // from EGL/eglext.h 54 private static final int GL_MATRIX_SIZE = 16; 55 private static final int VERTEX_POS_SIZE = 3; 56 private static final int VERTEX_UV_SIZE = 2; 57 private static final int EGL_COLOR_BITLENGTH = 8; 58 private static final int GLES_VERSION = 2; 59 private static final int PBUFFER_PIXEL_BYTES = 4; 60 61 private static final int FLIP_TYPE_NONE = 0; 62 private static final int FLIP_TYPE_HORIZONTAL = 1; 63 private static final int FLIP_TYPE_VERTICAL = 2; 64 private static final int FLIP_TYPE_BOTH = FLIP_TYPE_HORIZONTAL | FLIP_TYPE_VERTICAL; 65 66 private EGLDisplay mEGLDisplay = EGL14.EGL_NO_DISPLAY; 67 private EGLContext mEGLContext = EGL14.EGL_NO_CONTEXT; 68 private EGLConfig mConfigs; 69 70 private class EGLSurfaceHolder { 71 Surface surface; 72 EGLSurface eglSurface; 73 int width; 74 int height; 75 } 76 77 private List<EGLSurfaceHolder> mSurfaces = new ArrayList<EGLSurfaceHolder>(); 78 private List<EGLSurfaceHolder> mConversionSurfaces = new ArrayList<EGLSurfaceHolder>(); 79 80 private ByteBuffer mPBufferPixels; 81 82 // Hold this to avoid GC 83 private volatile SurfaceTexture mSurfaceTexture; 84 85 private static final int FLOAT_SIZE_BYTES = 4; 86 private static final int TRIANGLE_VERTICES_DATA_STRIDE_BYTES = 5 * FLOAT_SIZE_BYTES; 87 private static final int TRIANGLE_VERTICES_DATA_POS_OFFSET = 0; 88 private static final int TRIANGLE_VERTICES_DATA_UV_OFFSET = 3; 89 90 // Sampling is mirrored across the horizontal axis 91 private static final float[] sHorizontalFlipTriangleVertices = { 92 // X, Y, Z, U, V 93 -1.0f, -1.0f, 0, 1.f, 0.f, 94 1.0f, -1.0f, 0, 0.f, 0.f, 95 -1.0f, 1.0f, 0, 1.f, 1.f, 96 1.0f, 1.0f, 0, 0.f, 1.f, 97 }; 98 99 // Sampling is mirrored across the vertical axis 100 private static final float[] sVerticalFlipTriangleVertices = { 101 // X, Y, Z, U, V 102 -1.0f, -1.0f, 0, 0.f, 1.f, 103 1.0f, -1.0f, 0, 1.f, 1.f, 104 -1.0f, 1.0f, 0, 0.f, 0.f, 105 1.0f, 1.0f, 0, 1.f, 0.f, 106 }; 107 108 // Sampling is mirrored across the both axes 109 private static final float[] sBothFlipTriangleVertices = { 110 // X, Y, Z, U, V 111 -1.0f, -1.0f, 0, 1.f, 1.f, 112 1.0f, -1.0f, 0, 0.f, 1.f, 113 -1.0f, 1.0f, 0, 1.f, 0.f, 114 1.0f, 1.0f, 0, 0.f, 0.f, 115 }; 116 117 // Sampling is 1:1 for a straight copy for the back camera 118 private static final float[] sRegularTriangleVertices = { 119 // X, Y, Z, U, V 120 -1.0f, -1.0f, 0, 0.f, 0.f, 121 1.0f, -1.0f, 0, 1.f, 0.f, 122 -1.0f, 1.0f, 0, 0.f, 1.f, 123 1.0f, 1.0f, 0, 1.f, 1.f, 124 }; 125 126 private FloatBuffer mRegularTriangleVertices; 127 private FloatBuffer mHorizontalFlipTriangleVertices; 128 private FloatBuffer mVerticalFlipTriangleVertices; 129 private FloatBuffer mBothFlipTriangleVertices; 130 private final int mFacing; 131 132 /** 133 * As used in this file, this vertex shader maps a unit square to the view, and 134 * tells the fragment shader to interpolate over it. Each surface pixel position 135 * is mapped to a 2D homogeneous texture coordinate of the form (s, t, 0, 1) with 136 * s and t in the inclusive range [0, 1], and the matrix from 137 * {@link SurfaceTexture#getTransformMatrix(float[])} is used to map this 138 * coordinate to a texture location. 139 */ 140 private static final String VERTEX_SHADER = 141 "uniform mat4 uMVPMatrix;\n" + 142 "uniform mat4 uSTMatrix;\n" + 143 "attribute vec4 aPosition;\n" + 144 "attribute vec4 aTextureCoord;\n" + 145 "varying vec2 vTextureCoord;\n" + 146 "void main() {\n" + 147 " gl_Position = uMVPMatrix * aPosition;\n" + 148 " vTextureCoord = (uSTMatrix * aTextureCoord).xy;\n" + 149 "}\n"; 150 151 /** 152 * This fragment shader simply draws the color in the 2D texture at 153 * the location from the {@code VERTEX_SHADER}. 154 */ 155 private static final String FRAGMENT_SHADER = 156 "#extension GL_OES_EGL_image_external : require\n" + 157 "precision mediump float;\n" + 158 "varying vec2 vTextureCoord;\n" + 159 "uniform samplerExternalOES sTexture;\n" + 160 "void main() {\n" + 161 " gl_FragColor = texture2D(sTexture, vTextureCoord);\n" + 162 "}\n"; 163 164 private float[] mMVPMatrix = new float[GL_MATRIX_SIZE]; 165 private float[] mSTMatrix = new float[GL_MATRIX_SIZE]; 166 167 private int mProgram; 168 private int mTextureID = 0; 169 private int muMVPMatrixHandle; 170 private int muSTMatrixHandle; 171 private int maPositionHandle; 172 private int maTextureHandle; 173 174 private PerfMeasurement mPerfMeasurer = null; 175 private static final String LEGACY_PERF_PROPERTY = "persist.camera.legacy_perf"; 176 177 public SurfaceTextureRenderer(int facing) { 178 mFacing = facing; 179 180 mRegularTriangleVertices = ByteBuffer.allocateDirect(sRegularTriangleVertices.length * 181 FLOAT_SIZE_BYTES).order(ByteOrder.nativeOrder()).asFloatBuffer(); 182 mRegularTriangleVertices.put(sRegularTriangleVertices).position(0); 183 184 mHorizontalFlipTriangleVertices = ByteBuffer.allocateDirect( 185 sHorizontalFlipTriangleVertices.length * FLOAT_SIZE_BYTES). 186 order(ByteOrder.nativeOrder()).asFloatBuffer(); 187 mHorizontalFlipTriangleVertices.put(sHorizontalFlipTriangleVertices).position(0); 188 189 mVerticalFlipTriangleVertices = ByteBuffer.allocateDirect( 190 sVerticalFlipTriangleVertices.length * FLOAT_SIZE_BYTES). 191 order(ByteOrder.nativeOrder()).asFloatBuffer(); 192 mVerticalFlipTriangleVertices.put(sVerticalFlipTriangleVertices).position(0); 193 194 mBothFlipTriangleVertices = ByteBuffer.allocateDirect( 195 sBothFlipTriangleVertices.length * FLOAT_SIZE_BYTES). 196 order(ByteOrder.nativeOrder()).asFloatBuffer(); 197 mBothFlipTriangleVertices.put(sBothFlipTriangleVertices).position(0); 198 199 Matrix.setIdentityM(mSTMatrix, 0); 200 } 201 202 private int loadShader(int shaderType, String source) { 203 int shader = GLES20.glCreateShader(shaderType); 204 checkGlError("glCreateShader type=" + shaderType); 205 GLES20.glShaderSource(shader, source); 206 GLES20.glCompileShader(shader); 207 int[] compiled = new int[1]; 208 GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0); 209 if (compiled[0] == 0) { 210 Log.e(TAG, "Could not compile shader " + shaderType + ":"); 211 Log.e(TAG, " " + GLES20.glGetShaderInfoLog(shader)); 212 GLES20.glDeleteShader(shader); 213 // TODO: handle this more gracefully 214 throw new IllegalStateException("Could not compile shader " + shaderType); 215 } 216 return shader; 217 } 218 219 private int createProgram(String vertexSource, String fragmentSource) { 220 int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexSource); 221 if (vertexShader == 0) { 222 return 0; 223 } 224 int pixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource); 225 if (pixelShader == 0) { 226 return 0; 227 } 228 229 int program = GLES20.glCreateProgram(); 230 checkGlError("glCreateProgram"); 231 if (program == 0) { 232 Log.e(TAG, "Could not create program"); 233 } 234 GLES20.glAttachShader(program, vertexShader); 235 checkGlError("glAttachShader"); 236 GLES20.glAttachShader(program, pixelShader); 237 checkGlError("glAttachShader"); 238 GLES20.glLinkProgram(program); 239 int[] linkStatus = new int[1]; 240 GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, linkStatus, 0); 241 if (linkStatus[0] != GLES20.GL_TRUE) { 242 Log.e(TAG, "Could not link program: "); 243 Log.e(TAG, GLES20.glGetProgramInfoLog(program)); 244 GLES20.glDeleteProgram(program); 245 // TODO: handle this more gracefully 246 throw new IllegalStateException("Could not link program"); 247 } 248 return program; 249 } 250 251 private void drawFrame(SurfaceTexture st, int width, int height, int flipType) 252 throws LegacyExceptionUtils.BufferQueueAbandonedException { 253 checkGlError("onDrawFrame start"); 254 st.getTransformMatrix(mSTMatrix); 255 256 Matrix.setIdentityM(mMVPMatrix, /*smOffset*/0); 257 258 // Find intermediate buffer dimensions 259 Size dimens; 260 try { 261 dimens = LegacyCameraDevice.getTextureSize(st); 262 } catch (LegacyExceptionUtils.BufferQueueAbandonedException e) { 263 // Should never hit this. 264 throw new IllegalStateException("Surface abandoned, skipping drawFrame...", e); 265 } 266 float texWidth = dimens.getWidth(); 267 float texHeight = dimens.getHeight(); 268 269 if (texWidth <= 0 || texHeight <= 0) { 270 throw new IllegalStateException("Illegal intermediate texture with dimension of 0"); 271 } 272 273 // Letterbox or pillar-box output dimensions into intermediate dimensions. 274 RectF intermediate = new RectF(/*left*/0, /*top*/0, /*right*/texWidth, /*bottom*/texHeight); 275 RectF output = new RectF(/*left*/0, /*top*/0, /*right*/width, /*bottom*/height); 276 android.graphics.Matrix boxingXform = new android.graphics.Matrix(); 277 boxingXform.setRectToRect(output, intermediate, android.graphics.Matrix.ScaleToFit.CENTER); 278 boxingXform.mapRect(output); 279 280 // Find scaling factor from pillar-boxed/letter-boxed output dimensions to intermediate 281 // buffer dimensions. 282 float scaleX = intermediate.width() / output.width(); 283 float scaleY = intermediate.height() / output.height(); 284 285 // Intermediate texture is implicitly scaled to 'fill' the output dimensions in clip space 286 // coordinates in the shader. To avoid stretching, we need to scale the larger dimension 287 // of the intermediate buffer so that the output buffer is actually letter-boxed 288 // or pillar-boxed into the intermediate buffer after clipping. 289 Matrix.scaleM(mMVPMatrix, /*offset*/0, /*x*/scaleX, /*y*/scaleY, /*z*/1); 290 291 if (DEBUG) { 292 Log.d(TAG, "Scaling factors (S_x = " + scaleX + ",S_y = " + scaleY + ") used for " + 293 width + "x" + height + " surface, intermediate buffer size is " + texWidth + 294 "x" + texHeight); 295 } 296 297 // Set viewport to be output buffer dimensions 298 GLES20.glViewport(0, 0, width, height); 299 300 if (DEBUG) { 301 GLES20.glClearColor(1.0f, 0.0f, 0.0f, 1.0f); 302 GLES20.glClear(GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT); 303 } 304 305 GLES20.glUseProgram(mProgram); 306 checkGlError("glUseProgram"); 307 308 GLES20.glActiveTexture(GLES20.GL_TEXTURE0); 309 GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, mTextureID); 310 311 FloatBuffer triangleVertices; 312 switch(flipType) { 313 case FLIP_TYPE_HORIZONTAL: 314 triangleVertices = mHorizontalFlipTriangleVertices; 315 break; 316 case FLIP_TYPE_VERTICAL: 317 triangleVertices = mVerticalFlipTriangleVertices; 318 break; 319 case FLIP_TYPE_BOTH: 320 triangleVertices = mBothFlipTriangleVertices; 321 break; 322 default: 323 triangleVertices = mRegularTriangleVertices; 324 break; 325 } 326 327 triangleVertices.position(TRIANGLE_VERTICES_DATA_POS_OFFSET); 328 GLES20.glVertexAttribPointer(maPositionHandle, VERTEX_POS_SIZE, GLES20.GL_FLOAT, 329 /*normalized*/ false, TRIANGLE_VERTICES_DATA_STRIDE_BYTES, triangleVertices); 330 checkGlError("glVertexAttribPointer maPosition"); 331 GLES20.glEnableVertexAttribArray(maPositionHandle); 332 checkGlError("glEnableVertexAttribArray maPositionHandle"); 333 334 triangleVertices.position(TRIANGLE_VERTICES_DATA_UV_OFFSET); 335 GLES20.glVertexAttribPointer(maTextureHandle, VERTEX_UV_SIZE, GLES20.GL_FLOAT, 336 /*normalized*/ false, TRIANGLE_VERTICES_DATA_STRIDE_BYTES, triangleVertices); 337 checkGlError("glVertexAttribPointer maTextureHandle"); 338 GLES20.glEnableVertexAttribArray(maTextureHandle); 339 checkGlError("glEnableVertexAttribArray maTextureHandle"); 340 341 GLES20.glUniformMatrix4fv(muMVPMatrixHandle, /*count*/ 1, /*transpose*/ false, mMVPMatrix, 342 /*offset*/ 0); 343 GLES20.glUniformMatrix4fv(muSTMatrixHandle, /*count*/ 1, /*transpose*/ false, mSTMatrix, 344 /*offset*/ 0); 345 346 GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, /*offset*/ 0, /*count*/ 4); 347 checkGlDrawError("glDrawArrays"); 348 } 349 350 /** 351 * Initializes GL state. Call this after the EGL surface has been created and made current. 352 */ 353 private void initializeGLState() { 354 mProgram = createProgram(VERTEX_SHADER, FRAGMENT_SHADER); 355 if (mProgram == 0) { 356 throw new IllegalStateException("failed creating program"); 357 } 358 maPositionHandle = GLES20.glGetAttribLocation(mProgram, "aPosition"); 359 checkGlError("glGetAttribLocation aPosition"); 360 if (maPositionHandle == -1) { 361 throw new IllegalStateException("Could not get attrib location for aPosition"); 362 } 363 maTextureHandle = GLES20.glGetAttribLocation(mProgram, "aTextureCoord"); 364 checkGlError("glGetAttribLocation aTextureCoord"); 365 if (maTextureHandle == -1) { 366 throw new IllegalStateException("Could not get attrib location for aTextureCoord"); 367 } 368 369 muMVPMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMVPMatrix"); 370 checkGlError("glGetUniformLocation uMVPMatrix"); 371 if (muMVPMatrixHandle == -1) { 372 throw new IllegalStateException("Could not get attrib location for uMVPMatrix"); 373 } 374 375 muSTMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uSTMatrix"); 376 checkGlError("glGetUniformLocation uSTMatrix"); 377 if (muSTMatrixHandle == -1) { 378 throw new IllegalStateException("Could not get attrib location for uSTMatrix"); 379 } 380 381 int[] textures = new int[1]; 382 GLES20.glGenTextures(/*n*/ 1, textures, /*offset*/ 0); 383 384 mTextureID = textures[0]; 385 GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, mTextureID); 386 checkGlError("glBindTexture mTextureID"); 387 388 GLES20.glTexParameterf(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MIN_FILTER, 389 GLES20.GL_NEAREST); 390 GLES20.glTexParameterf(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MAG_FILTER, 391 GLES20.GL_LINEAR); 392 GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_S, 393 GLES20.GL_CLAMP_TO_EDGE); 394 GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_T, 395 GLES20.GL_CLAMP_TO_EDGE); 396 checkGlError("glTexParameter"); 397 } 398 399 private int getTextureId() { 400 return mTextureID; 401 } 402 403 private void clearState() { 404 mSurfaces.clear(); 405 for (EGLSurfaceHolder holder : mConversionSurfaces) { 406 try { 407 LegacyCameraDevice.disconnectSurface(holder.surface); 408 } catch (LegacyExceptionUtils.BufferQueueAbandonedException e) { 409 Log.w(TAG, "Surface abandoned, skipping...", e); 410 } 411 } 412 mConversionSurfaces.clear(); 413 mPBufferPixels = null; 414 if (mSurfaceTexture != null) { 415 mSurfaceTexture.release(); 416 } 417 mSurfaceTexture = null; 418 } 419 420 private void configureEGLContext() { 421 mEGLDisplay = EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY); 422 if (mEGLDisplay == EGL14.EGL_NO_DISPLAY) { 423 throw new IllegalStateException("No EGL14 display"); 424 } 425 int[] version = new int[2]; 426 if (!EGL14.eglInitialize(mEGLDisplay, version, /*offset*/ 0, version, /*offset*/ 1)) { 427 throw new IllegalStateException("Cannot initialize EGL14"); 428 } 429 430 int[] attribList = { 431 EGL14.EGL_RED_SIZE, EGL_COLOR_BITLENGTH, 432 EGL14.EGL_GREEN_SIZE, EGL_COLOR_BITLENGTH, 433 EGL14.EGL_BLUE_SIZE, EGL_COLOR_BITLENGTH, 434 EGL14.EGL_RENDERABLE_TYPE, EGL14.EGL_OPENGL_ES2_BIT, 435 EGL_RECORDABLE_ANDROID, 1, 436 EGL14.EGL_SURFACE_TYPE, EGL14.EGL_PBUFFER_BIT | EGL14.EGL_WINDOW_BIT, 437 EGL14.EGL_NONE 438 }; 439 EGLConfig[] configs = new EGLConfig[1]; 440 int[] numConfigs = new int[1]; 441 EGL14.eglChooseConfig(mEGLDisplay, attribList, /*offset*/ 0, configs, /*offset*/ 0, 442 configs.length, numConfigs, /*offset*/ 0); 443 checkEglError("eglCreateContext RGB888+recordable ES2"); 444 mConfigs = configs[0]; 445 int[] attrib_list = { 446 EGL14.EGL_CONTEXT_CLIENT_VERSION, GLES_VERSION, 447 EGL14.EGL_NONE 448 }; 449 mEGLContext = EGL14.eglCreateContext(mEGLDisplay, configs[0], EGL14.EGL_NO_CONTEXT, 450 attrib_list, /*offset*/ 0); 451 checkEglError("eglCreateContext"); 452 if(mEGLContext == EGL14.EGL_NO_CONTEXT) { 453 throw new IllegalStateException("No EGLContext could be made"); 454 } 455 } 456 457 private void configureEGLOutputSurfaces(Collection<EGLSurfaceHolder> surfaces) { 458 if (surfaces == null || surfaces.size() == 0) { 459 throw new IllegalStateException("No Surfaces were provided to draw to"); 460 } 461 int[] surfaceAttribs = { 462 EGL14.EGL_NONE 463 }; 464 for (EGLSurfaceHolder holder : surfaces) { 465 holder.eglSurface = EGL14.eglCreateWindowSurface(mEGLDisplay, mConfigs, 466 holder.surface, surfaceAttribs, /*offset*/ 0); 467 checkEglError("eglCreateWindowSurface"); 468 } 469 } 470 471 private void configureEGLPbufferSurfaces(Collection<EGLSurfaceHolder> surfaces) { 472 if (surfaces == null || surfaces.size() == 0) { 473 throw new IllegalStateException("No Surfaces were provided to draw to"); 474 } 475 476 int maxLength = 0; 477 for (EGLSurfaceHolder holder : surfaces) { 478 int length = holder.width * holder.height; 479 // Find max surface size, ensure PBuffer can hold this many pixels 480 maxLength = (length > maxLength) ? length : maxLength; 481 int[] surfaceAttribs = { 482 EGL14.EGL_WIDTH, holder.width, 483 EGL14.EGL_HEIGHT, holder.height, 484 EGL14.EGL_NONE 485 }; 486 holder.eglSurface = 487 EGL14.eglCreatePbufferSurface(mEGLDisplay, mConfigs, surfaceAttribs, 0); 488 checkEglError("eglCreatePbufferSurface"); 489 } 490 mPBufferPixels = ByteBuffer.allocateDirect(maxLength * PBUFFER_PIXEL_BYTES) 491 .order(ByteOrder.nativeOrder()); 492 } 493 494 private void releaseEGLContext() { 495 if (mEGLDisplay != EGL14.EGL_NO_DISPLAY) { 496 EGL14.eglMakeCurrent(mEGLDisplay, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_SURFACE, 497 EGL14.EGL_NO_CONTEXT); 498 dumpGlTiming(); 499 if (mSurfaces != null) { 500 for (EGLSurfaceHolder holder : mSurfaces) { 501 if (holder.eglSurface != null) { 502 EGL14.eglDestroySurface(mEGLDisplay, holder.eglSurface); 503 } 504 } 505 } 506 if (mConversionSurfaces != null) { 507 for (EGLSurfaceHolder holder : mConversionSurfaces) { 508 if (holder.eglSurface != null) { 509 EGL14.eglDestroySurface(mEGLDisplay, holder.eglSurface); 510 } 511 } 512 } 513 EGL14.eglDestroyContext(mEGLDisplay, mEGLContext); 514 EGL14.eglReleaseThread(); 515 EGL14.eglTerminate(mEGLDisplay); 516 } 517 518 mConfigs = null; 519 mEGLDisplay = EGL14.EGL_NO_DISPLAY; 520 mEGLContext = EGL14.EGL_NO_CONTEXT; 521 clearState(); 522 } 523 524 private void makeCurrent(EGLSurface surface) { 525 EGL14.eglMakeCurrent(mEGLDisplay, surface, surface, mEGLContext); 526 checkEglError("makeCurrent"); 527 } 528 529 private boolean swapBuffers(EGLSurface surface) 530 throws LegacyExceptionUtils.BufferQueueAbandonedException { 531 boolean result = EGL14.eglSwapBuffers(mEGLDisplay, surface); 532 int error = EGL14.eglGetError(); 533 if (error == EGL14.EGL_BAD_SURFACE) { 534 throw new LegacyExceptionUtils.BufferQueueAbandonedException(); 535 } else if (error != EGL14.EGL_SUCCESS) { 536 throw new IllegalStateException("swapBuffers: EGL error: 0x" + 537 Integer.toHexString(error)); 538 } 539 return result; 540 } 541 542 private void checkEglError(String msg) { 543 int error; 544 if ((error = EGL14.eglGetError()) != EGL14.EGL_SUCCESS) { 545 throw new IllegalStateException(msg + ": EGL error: 0x" + Integer.toHexString(error)); 546 } 547 } 548 549 private void checkGlError(String msg) { 550 int error; 551 while ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR) { 552 throw new IllegalStateException( 553 msg + ": GLES20 error: 0x" + Integer.toHexString(error)); 554 } 555 } 556 557 private void checkGlDrawError(String msg) 558 throws LegacyExceptionUtils.BufferQueueAbandonedException { 559 int error; 560 boolean surfaceAbandoned = false; 561 boolean glError = false; 562 while ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR) { 563 if (error == GLES20.GL_OUT_OF_MEMORY) { 564 surfaceAbandoned = true; 565 } else { 566 glError = true; 567 } 568 } 569 if (glError) { 570 throw new IllegalStateException( 571 msg + ": GLES20 error: 0x" + Integer.toHexString(error)); 572 } 573 if (surfaceAbandoned) { 574 throw new LegacyExceptionUtils.BufferQueueAbandonedException(); 575 } 576 } 577 578 /** 579 * Save a measurement dump to disk, in 580 * {@code /sdcard/CameraLegacy/durations_<time>_<width1>x<height1>_...txt} 581 */ 582 private void dumpGlTiming() { 583 if (mPerfMeasurer == null) return; 584 585 File legacyStorageDir = new File(Environment.getExternalStorageDirectory(), "CameraLegacy"); 586 if (!legacyStorageDir.exists()){ 587 if (!legacyStorageDir.mkdirs()){ 588 Log.e(TAG, "Failed to create directory for data dump"); 589 return; 590 } 591 } 592 593 StringBuilder path = new StringBuilder(legacyStorageDir.getPath()); 594 path.append(File.separator); 595 path.append("durations_"); 596 597 Time now = new Time(); 598 now.setToNow(); 599 path.append(now.format2445()); 600 path.append("_S"); 601 for (EGLSurfaceHolder surface : mSurfaces) { 602 path.append(String.format("_%d_%d", surface.width, surface.height)); 603 } 604 path.append("_C"); 605 for (EGLSurfaceHolder surface : mConversionSurfaces) { 606 path.append(String.format("_%d_%d", surface.width, surface.height)); 607 } 608 path.append(".txt"); 609 mPerfMeasurer.dumpPerformanceData(path.toString()); 610 } 611 612 private void setupGlTiming() { 613 if (PerfMeasurement.isGlTimingSupported()) { 614 Log.d(TAG, "Enabling GL performance measurement"); 615 mPerfMeasurer = new PerfMeasurement(); 616 } else { 617 Log.d(TAG, "GL performance measurement not supported on this device"); 618 mPerfMeasurer = null; 619 } 620 } 621 622 private void beginGlTiming() { 623 if (mPerfMeasurer == null) return; 624 mPerfMeasurer.startTimer(); 625 } 626 627 private void addGlTimestamp(long timestamp) { 628 if (mPerfMeasurer == null) return; 629 mPerfMeasurer.addTimestamp(timestamp); 630 } 631 632 private void endGlTiming() { 633 if (mPerfMeasurer == null) return; 634 mPerfMeasurer.stopTimer(); 635 } 636 637 /** 638 * Return the surface texture to draw to - this is the texture use to when producing output 639 * surface buffers. 640 * 641 * @return a {@link SurfaceTexture}. 642 */ 643 public SurfaceTexture getSurfaceTexture() { 644 return mSurfaceTexture; 645 } 646 647 /** 648 * Set a collection of output {@link Surface}s that can be drawn to. 649 * 650 * @param surfaces a {@link Collection} of surfaces. 651 */ 652 public void configureSurfaces(Collection<Pair<Surface, Size>> surfaces) { 653 releaseEGLContext(); 654 655 if (surfaces == null || surfaces.size() == 0) { 656 Log.w(TAG, "No output surfaces configured for GL drawing."); 657 return; 658 } 659 660 for (Pair<Surface, Size> p : surfaces) { 661 Surface s = p.first; 662 Size surfaceSize = p.second; 663 // If pixel conversions aren't handled by egl, use a pbuffer 664 try { 665 EGLSurfaceHolder holder = new EGLSurfaceHolder(); 666 holder.surface = s; 667 holder.width = surfaceSize.getWidth(); 668 holder.height = surfaceSize.getHeight(); 669 if (LegacyCameraDevice.needsConversion(s)) { 670 mConversionSurfaces.add(holder); 671 // LegacyCameraDevice is the producer of surfaces if it's not handled by EGL, 672 // so LegacyCameraDevice needs to connect to the surfaces. 673 LegacyCameraDevice.connectSurface(s); 674 } else { 675 mSurfaces.add(holder); 676 } 677 } catch (LegacyExceptionUtils.BufferQueueAbandonedException e) { 678 Log.w(TAG, "Surface abandoned, skipping configuration... ", e); 679 } 680 } 681 682 // Set up egl display 683 configureEGLContext(); 684 685 // Set up regular egl surfaces if needed 686 if (mSurfaces.size() > 0) { 687 configureEGLOutputSurfaces(mSurfaces); 688 } 689 690 // Set up pbuffer surface if needed 691 if (mConversionSurfaces.size() > 0) { 692 configureEGLPbufferSurfaces(mConversionSurfaces); 693 } 694 makeCurrent((mSurfaces.size() > 0) ? mSurfaces.get(0).eglSurface : 695 mConversionSurfaces.get(0).eglSurface); 696 initializeGLState(); 697 mSurfaceTexture = new SurfaceTexture(getTextureId()); 698 699 // Set up performance tracking if enabled 700 if (SystemProperties.getBoolean(LEGACY_PERF_PROPERTY, false)) { 701 setupGlTiming(); 702 } 703 } 704 705 /** 706 * Draw the current buffer in the {@link SurfaceTexture} returned from 707 * {@link #getSurfaceTexture()} into the set of target {@link Surface}s 708 * in the next request from the given {@link CaptureCollector}, or drop 709 * the frame if none is available. 710 * 711 * <p> 712 * Any {@link Surface}s targeted must be a subset of the {@link Surface}s 713 * set in the last {@link #configureSurfaces(java.util.Collection)} call. 714 * </p> 715 * 716 * @param targetCollector the surfaces to draw to. 717 */ 718 public void drawIntoSurfaces(CaptureCollector targetCollector) { 719 if ((mSurfaces == null || mSurfaces.size() == 0) 720 && (mConversionSurfaces == null || mConversionSurfaces.size() == 0)) { 721 return; 722 } 723 724 boolean doTiming = targetCollector.hasPendingPreviewCaptures(); 725 checkGlError("before updateTexImage"); 726 727 if (doTiming) { 728 beginGlTiming(); 729 } 730 731 mSurfaceTexture.updateTexImage(); 732 733 long timestamp = mSurfaceTexture.getTimestamp(); 734 735 Pair<RequestHolder, Long> captureHolder = targetCollector.previewCaptured(timestamp); 736 737 // No preview request queued, drop frame. 738 if (captureHolder == null) { 739 if (DEBUG) { 740 Log.d(TAG, "Dropping preview frame."); 741 } 742 if (doTiming) { 743 endGlTiming(); 744 } 745 return; 746 } 747 748 RequestHolder request = captureHolder.first; 749 750 Collection<Surface> targetSurfaces = request.getHolderTargets(); 751 if (doTiming) { 752 addGlTimestamp(timestamp); 753 } 754 755 List<Long> targetSurfaceIds = new ArrayList(); 756 try { 757 targetSurfaceIds = LegacyCameraDevice.getSurfaceIds(targetSurfaces); 758 } catch (LegacyExceptionUtils.BufferQueueAbandonedException e) { 759 Log.w(TAG, "Surface abandoned, dropping frame. ", e); 760 request.setOutputAbandoned(); 761 } 762 763 for (EGLSurfaceHolder holder : mSurfaces) { 764 if (LegacyCameraDevice.containsSurfaceId(holder.surface, targetSurfaceIds)) { 765 try{ 766 LegacyCameraDevice.setSurfaceDimens(holder.surface, holder.width, 767 holder.height); 768 makeCurrent(holder.eglSurface); 769 770 LegacyCameraDevice.setNextTimestamp(holder.surface, captureHolder.second); 771 drawFrame(mSurfaceTexture, holder.width, holder.height, 772 (mFacing == CameraCharacteristics.LENS_FACING_FRONT) ? 773 FLIP_TYPE_HORIZONTAL : FLIP_TYPE_NONE); 774 swapBuffers(holder.eglSurface); 775 } catch (LegacyExceptionUtils.BufferQueueAbandonedException e) { 776 Log.w(TAG, "Surface abandoned, dropping frame. ", e); 777 request.setOutputAbandoned(); 778 } 779 } 780 } 781 for (EGLSurfaceHolder holder : mConversionSurfaces) { 782 if (LegacyCameraDevice.containsSurfaceId(holder.surface, targetSurfaceIds)) { 783 makeCurrent(holder.eglSurface); 784 // glReadPixels reads from the bottom of the buffer, so add an extra vertical flip 785 try { 786 drawFrame(mSurfaceTexture, holder.width, holder.height, 787 (mFacing == CameraCharacteristics.LENS_FACING_FRONT) ? 788 FLIP_TYPE_BOTH : FLIP_TYPE_VERTICAL); 789 } catch (LegacyExceptionUtils.BufferQueueAbandonedException e) { 790 // Should never hit this. 791 throw new IllegalStateException("Surface abandoned, skipping drawFrame...", e); 792 } 793 mPBufferPixels.clear(); 794 GLES20.glReadPixels(/*x*/ 0, /*y*/ 0, holder.width, holder.height, 795 GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, mPBufferPixels); 796 checkGlError("glReadPixels"); 797 798 try { 799 int format = LegacyCameraDevice.detectSurfaceType(holder.surface); 800 LegacyCameraDevice.setSurfaceDimens(holder.surface, holder.width, 801 holder.height); 802 LegacyCameraDevice.setNextTimestamp(holder.surface, captureHolder.second); 803 LegacyCameraDevice.produceFrame(holder.surface, mPBufferPixels.array(), 804 holder.width, holder.height, format); 805 } catch (LegacyExceptionUtils.BufferQueueAbandonedException e) { 806 Log.w(TAG, "Surface abandoned, dropping frame. ", e); 807 request.setOutputAbandoned(); 808 } 809 } 810 } 811 targetCollector.previewProduced(); 812 813 if (doTiming) { 814 endGlTiming(); 815 } 816 } 817 818 /** 819 * Clean up the current GL context. 820 */ 821 public void cleanupEGLContext() { 822 releaseEGLContext(); 823 } 824 825 /** 826 * Drop all current GL operations on the floor. 827 */ 828 public void flush() { 829 // TODO: implement flush 830 Log.e(TAG, "Flush not yet implemented."); 831 } 832 } 833
