Index: webrtc/sdk/android/src/java/org/webrtc/OesTextureBuffer.java |
diff --git a/webrtc/sdk/android/src/java/org/webrtc/OesTextureBuffer.java b/webrtc/sdk/android/src/java/org/webrtc/OesTextureBuffer.java |
new file mode 100644 |
index 0000000000000000000000000000000000000000..8f2c4858205ce39a5c89e3a5518090272182256c |
--- /dev/null |
+++ b/webrtc/sdk/android/src/java/org/webrtc/OesTextureBuffer.java |
@@ -0,0 +1,92 @@ |
+/* |
+ * Copyright 2017 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.graphics.Matrix; |
+import java.nio.ByteBuffer; |
+import org.webrtc.VideoFrame.I420Buffer; |
+import org.webrtc.VideoFrame.TextureBuffer; |
+ |
+/** Android OES texture buffer. */ |
+class OesTextureBuffer implements TextureBuffer { |
sakal
2017/07/17 13:44:56
I think this class is inherently tied to SurfaceTe
mellem
2017/07/17 21:57:15
Moved this into SurfaceTextureHelper. I'm not sur
|
+ private final int id; |
+ private final int width; |
+ private final int height; |
+ private final float[] transformMatrix; |
+ private final SurfaceTextureHelper helper; |
+ private int refCount; |
+ |
+ OesTextureBuffer( |
+ int id, int width, int height, float[] transformMatrix, SurfaceTextureHelper helper) { |
+ this.id = id; |
+ this.width = width; |
+ this.height = height; |
+ this.transformMatrix = transformMatrix; |
+ this.helper = helper; |
+ this.refCount = 1; // Creator implicitly holds a reference. |
+ } |
+ |
+ @Override |
+ public TextureBuffer.Type getType() { |
+ return TextureBuffer.Type.OES; |
+ } |
+ |
+ @Override |
+ public int getTextureId() { |
+ return id; |
+ } |
+ |
+ @Override |
+ public int getWidth() { |
+ return width; |
+ } |
+ |
+ @Override |
+ public int getHeight() { |
+ return height; |
+ } |
+ |
+ @Override |
+ public I420Buffer toI420() { |
+ // SurfaceTextureHelper requires a stride that is divisible by 8. Round width up. |
+ // See SurfaceTextureHelper for details on the size and format. |
+ int stride = ((width + 7) / 8) * 8; |
+ int uvHeight = (height + 1) / 2; |
+ // Due to the layout used by SurfaceTextureHelper, vPos + stride * uvHeight would overrun the |
+ // buffer. Add one row at the bottom to compensate for this. There will never be data in the |
+ // extra row, but now other code does not have to deal with v stride * v height exceeding the |
+ // buffer's capacity. |
+ int size = stride * (height + uvHeight + 1); |
+ ByteBuffer buffer = ByteBuffer.allocateDirect(size); |
+ helper.textureToYUV(buffer, width, height, stride, id, transformMatrix); |
+ |
+ int yPos = 0; |
+ int uPos = yPos + stride * height; |
+ // Rows of U and V alternate in the buffer, so V data starts after the first row of U. |
+ int vPos = yPos + stride / 2; |
+ |
+ // SurfaceTextureHelper uses the same stride for Y, U, and V data. |
+ return new I420BufferImpl( |
+ buffer, width, height, yPos, stride, uPos, stride, vPos, stride, null); |
+ } |
+ |
+ @Override |
+ public void retain() { |
+ ++refCount; |
+ } |
+ |
+ @Override |
+ public void release() { |
+ if (--refCount == 0) { |
+ helper.returnTextureFrame(); |
+ } |
+ } |
+} |