Move /webrtc/api/android files to /webrtc/sdk/android

webrtc/api/android/java/src/org/webrtc/YuvConverter.java

Index: webrtc/api/android/java/src/org/webrtc/YuvConverter.java
diff --git a/webrtc/api/android/java/src/org/webrtc/YuvConverter.java b/webrtc/api/android/java/src/org/webrtc/YuvConverter.java
deleted file mode 100644
index 050d69de8edbaa3c95d37cd8f1750bf740e974d9..0000000000000000000000000000000000000000
--- a/webrtc/api/android/java/src/org/webrtc/YuvConverter.java
+++ /dev/null
@@ -1,259 +0,0 @@
-/*
- *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-package org.webrtc;
-
-import android.opengl.GLES11Ext;
-import android.opengl.GLES20;
-import java.nio.ByteBuffer;
-import java.nio.FloatBuffer;
-
-/**
- * Class for converting OES textures to a YUV ByteBuffer. It should be constructed on a thread with
- * an active EGL context, and only be used from that thread.
- */
-class YuvConverter {
-  // Vertex coordinates in Normalized Device Coordinates, i.e.
-  // (-1, -1) is bottom-left and (1, 1) is top-right.
-  private static final FloatBuffer DEVICE_RECTANGLE = GlUtil.createFloatBuffer(new float[] {
-      -1.0f, -1.0f, // Bottom left.
-      1.0f, -1.0f, // Bottom right.
-      -1.0f, 1.0f, // Top left.
-      1.0f, 1.0f, // Top right.
-  });
-
-  // Texture coordinates - (0, 0) is bottom-left and (1, 1) is top-right.
-  private static final FloatBuffer TEXTURE_RECTANGLE = GlUtil.createFloatBuffer(new float[] {
-      0.0f, 0.0f, // Bottom left.
-      1.0f, 0.0f, // Bottom right.
-      0.0f, 1.0f, // Top left.
-      1.0f, 1.0f // Top right.
-  });
-
-  // clang-format off
-  private static final String VERTEX_SHADER =
-        "varying vec2 interp_tc;\n"
-      + "attribute vec4 in_pos;\n"
-      + "attribute vec4 in_tc;\n"
-      + "\n"
-      + "uniform mat4 texMatrix;\n"
-      + "\n"
-      + "void main() {\n"
-      + "    gl_Position = in_pos;\n"
-      + "    interp_tc = (texMatrix * in_tc).xy;\n"
-      + "}\n";
-
-  private static final String FRAGMENT_SHADER =
-        "#extension GL_OES_EGL_image_external : require\n"
-      + "precision mediump float;\n"
-      + "varying vec2 interp_tc;\n"
-      + "\n"
-      + "uniform samplerExternalOES oesTex;\n"
-      // Difference in texture coordinate corresponding to one
-      // sub-pixel in the x direction.
-      + "uniform vec2 xUnit;\n"
-      // Color conversion coefficients, including constant term
-      + "uniform vec4 coeffs;\n"
-      + "\n"
-      + "void main() {\n"
-      // Since the alpha read from the texture is always 1, this could
-      // be written as a mat4 x vec4 multiply. However, that seems to
-      // give a worse framerate, possibly because the additional
-      // multiplies by 1.0 consume resources. TODO(nisse): Could also
-      // try to do it as a vec3 x mat3x4, followed by an add in of a
-      // constant vector.
-      + "  gl_FragColor.r = coeffs.a + dot(coeffs.rgb,\n"
-      + "      texture2D(oesTex, interp_tc - 1.5 * xUnit).rgb);\n"
-      + "  gl_FragColor.g = coeffs.a + dot(coeffs.rgb,\n"
-      + "      texture2D(oesTex, interp_tc - 0.5 * xUnit).rgb);\n"
-      + "  gl_FragColor.b = coeffs.a + dot(coeffs.rgb,\n"
-      + "      texture2D(oesTex, interp_tc + 0.5 * xUnit).rgb);\n"
-      + "  gl_FragColor.a = coeffs.a + dot(coeffs.rgb,\n"
-      + "      texture2D(oesTex, interp_tc + 1.5 * xUnit).rgb);\n"
-      + "}\n";
-  // clang-format on
-
-  private final int frameBufferId;
-  private final int frameTextureId;
-  private final GlShader shader;
-  private final int texMatrixLoc;
-  private final int xUnitLoc;
-  private final int coeffsLoc;
-  private final ThreadUtils.ThreadChecker threadChecker = new ThreadUtils.ThreadChecker();
-  private int frameBufferWidth;
-  private int frameBufferHeight;
-  private boolean released = false;
-
-  /**
-   * This class should be constructed on a thread that has an active EGL context.
-   */
-  public YuvConverter() {
-    threadChecker.checkIsOnValidThread();
-    frameTextureId = GlUtil.generateTexture(GLES20.GL_TEXTURE_2D);
-    this.frameBufferWidth = 0;
-    this.frameBufferHeight = 0;
-
-    // Create framebuffer object and bind it.
-    final int frameBuffers[] = new int[1];
-    GLES20.glGenFramebuffers(1, frameBuffers, 0);
-    frameBufferId = frameBuffers[0];
-    GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, frameBufferId);
-    GlUtil.checkNoGLES2Error("Generate framebuffer");
-
-    // Attach the texture to the framebuffer as color attachment.
-    GLES20.glFramebufferTexture2D(GLES20.GL_FRAMEBUFFER, GLES20.GL_COLOR_ATTACHMENT0,
-        GLES20.GL_TEXTURE_2D, frameTextureId, 0);
-    GlUtil.checkNoGLES2Error("Attach texture to framebuffer");
-
-    // Restore normal framebuffer.
-    GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
-
-    shader = new GlShader(VERTEX_SHADER, FRAGMENT_SHADER);
-    shader.useProgram();
-    texMatrixLoc = shader.getUniformLocation("texMatrix");
-    xUnitLoc = shader.getUniformLocation("xUnit");
-    coeffsLoc = shader.getUniformLocation("coeffs");
-    GLES20.glUniform1i(shader.getUniformLocation("oesTex"), 0);
-    GlUtil.checkNoGLES2Error("Initialize fragment shader uniform values.");
-    // Initialize vertex shader attributes.
-    shader.setVertexAttribArray("in_pos", 2, DEVICE_RECTANGLE);
-    // If the width is not a multiple of 4 pixels, the texture
-    // will be scaled up slightly and clipped at the right border.
-    shader.setVertexAttribArray("in_tc", 2, TEXTURE_RECTANGLE);
-  }
-
-  public void convert(ByteBuffer buf, int width, int height, int stride, int srcTextureId,
-      float[] transformMatrix) {
-    threadChecker.checkIsOnValidThread();
-    if (released) {
-      throw new IllegalStateException("YuvConverter.convert called on released object");
-    }
-
-    // We draw into a buffer laid out like
-    //
-    //    +---------+
-    //    |         |
-    //    |  Y      |
-    //    |         |
-    //    |         |
-    //    +----+----+
-    //    | U  | V  |
-    //    |    |    |
-    //    +----+----+
-    //
-    // In memory, we use the same stride for all of Y, U and V. The
-    // U data starts at offset |height| * |stride| from the Y data,
-    // and the V data starts at at offset |stride/2| from the U
-    // data, with rows of U and V data alternating.
-    //
-    // Now, it would have made sense to allocate a pixel buffer with
-    // a single byte per pixel (EGL10.EGL_COLOR_BUFFER_TYPE,
-    // EGL10.EGL_LUMINANCE_BUFFER,), but that seems to be
-    // unsupported by devices. So do the following hack: Allocate an
-    // RGBA buffer, of width |stride|/4. To render each of these
-    // large pixels, sample the texture at 4 different x coordinates
-    // and store the results in the four components.
-    //
-    // Since the V data needs to start on a boundary of such a
-    // larger pixel, it is not sufficient that |stride| is even, it
-    // has to be a multiple of 8 pixels.
-
-    if (stride % 8 != 0) {
-      throw new IllegalArgumentException("Invalid stride, must be a multiple of 8");
-    }
-    if (stride < width) {
-      throw new IllegalArgumentException("Invalid stride, must >= width");
-    }
-
-    int y_width = (width + 3) / 4;
-    int uv_width = (width + 7) / 8;
-    int uv_height = (height + 1) / 2;
-    int total_height = height + uv_height;
-    int size = stride * total_height;
-
-    if (buf.capacity() < size) {
-      throw new IllegalArgumentException("YuvConverter.convert called with too small buffer");
-    }
-    // Produce a frame buffer starting at top-left corner, not
-    // bottom-left.
-    transformMatrix =
-        RendererCommon.multiplyMatrices(transformMatrix, RendererCommon.verticalFlipMatrix());
-
-    // Bind our framebuffer.
-    GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, frameBufferId);
-    GlUtil.checkNoGLES2Error("glBindFramebuffer");
-
-    if (frameBufferWidth != stride / 4 || frameBufferHeight != total_height) {
-      frameBufferWidth = stride / 4;
-      frameBufferHeight = total_height;
-      // (Re)-Allocate texture.
-      GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
-      GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, frameTextureId);
-      GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, frameBufferWidth,
-          frameBufferHeight, 0, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, null);
-
-      // Check that the framebuffer is in a good state.
-      final int status = GLES20.glCheckFramebufferStatus(GLES20.GL_FRAMEBUFFER);
-      if (status != GLES20.GL_FRAMEBUFFER_COMPLETE) {
-        throw new IllegalStateException("Framebuffer not complete, status: " + status);
-      }
-    }
-
-    GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
-    GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, srcTextureId);
-    GLES20.glUniformMatrix4fv(texMatrixLoc, 1, false, transformMatrix, 0);
-
-    // Draw Y
-    GLES20.glViewport(0, 0, y_width, height);
-    // Matrix * (1;0;0;0) / width. Note that opengl uses column major order.
-    GLES20.glUniform2f(xUnitLoc, transformMatrix[0] / width, transformMatrix[1] / width);
-    // Y'UV444 to RGB888, see
-    // https://en.wikipedia.org/wiki/YUV#Y.27UV444_to_RGB888_conversion.
-    // We use the ITU-R coefficients for U and V */
-    GLES20.glUniform4f(coeffsLoc, 0.299f, 0.587f, 0.114f, 0.0f);
-    GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
-
-    // Draw U
-    GLES20.glViewport(0, height, uv_width, uv_height);
-    // Matrix * (1;0;0;0) / (width / 2). Note that opengl uses column major order.
-    GLES20.glUniform2f(
-        xUnitLoc, 2.0f * transformMatrix[0] / width, 2.0f * transformMatrix[1] / width);
-    GLES20.glUniform4f(coeffsLoc, -0.169f, -0.331f, 0.499f, 0.5f);
-    GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
-
-    // Draw V
-    GLES20.glViewport(stride / 8, height, uv_width, uv_height);
-    GLES20.glUniform4f(coeffsLoc, 0.499f, -0.418f, -0.0813f, 0.5f);
-    GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
-
-    GLES20.glReadPixels(
-        0, 0, frameBufferWidth, frameBufferHeight, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, buf);
-
-    GlUtil.checkNoGLES2Error("YuvConverter.convert");
-
-    // Restore normal framebuffer.
-    GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);
-    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0);
-
-    // Unbind texture. Reportedly needed on some devices to get
-    // the texture updated from the camera.
-    GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, 0);
-  }
-
-  public void release() {
-    threadChecker.checkIsOnValidThread();
-    released = true;
-    shader.release();
-    GLES20.glDeleteTextures(1, new int[] {frameTextureId}, 0);
-    GLES20.glDeleteFramebuffers(1, new int[] {frameBufferId}, 0);
-    frameBufferWidth = 0;
-    frameBufferHeight = 0;
-  }
-}