diff options
Diffstat (limited to 'third_party/libwebrtc/sdk/android/api/org/webrtc/YuvHelper.java')
| -rw-r--r-- | third_party/libwebrtc/sdk/android/api/org/webrtc/YuvHelper.java | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/third_party/libwebrtc/sdk/android/api/org/webrtc/YuvHelper.java b/third_party/libwebrtc/sdk/android/api/org/webrtc/YuvHelper.java new file mode 100644 index 0000000000..afb8e837d1 --- /dev/null +++ b/third_party/libwebrtc/sdk/android/api/org/webrtc/YuvHelper.java @@ -0,0 +1,200 @@ +/* + * 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 java.nio.ByteBuffer; + +/** Wraps libyuv methods to Java. All passed byte buffers must be direct byte buffers. */ +public class YuvHelper { + /** + * Copy I420 Buffer to a contiguously allocated buffer. + * <p> In Android, MediaCodec can request a buffer of a specific layout with the stride and + * slice-height (or plane height), and this function is used in this case. + * <p> For more information, see + * https://cs.android.com/android/platform/superproject/+/64fea7e5726daebc40f46890100837c01091100d:frameworks/base/media/java/android/media/MediaFormat.java;l=568 + * @param dstStrideY the stride of output buffers' Y plane. + * @param dstSliceHeightY the slice-height of output buffer's Y plane. + * @param dstStrideU the stride of output buffers' U (and V) plane. + * @param dstSliceHeightU the slice-height of output buffer's U (and V) plane + */ + public static void I420Copy(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU, + ByteBuffer srcV, int srcStrideV, ByteBuffer dst, int dstWidth, int dstHeight, int dstStrideY, + int dstSliceHeightY, int dstStrideU, int dstSliceHeightU) { + final int chromaWidth = (dstWidth + 1) / 2; + final int chromaHeight = (dstHeight + 1) / 2; + + final int dstStartY = 0; + final int dstEndY = dstStartY + dstStrideY * dstHeight; + final int dstStartU = dstStartY + dstStrideY * dstSliceHeightY; + final int dstEndU = dstStartU + dstStrideU * chromaHeight; + final int dstStartV = dstStartU + dstStrideU * dstSliceHeightU; + // The last line doesn't need any padding, so use chromaWidth + // to calculate the exact end position. + final int dstEndV = dstStartV + dstStrideU * (chromaHeight - 1) + chromaWidth; + if (dst.capacity() < dstEndV) { + throw new IllegalArgumentException("Expected destination buffer capacity to be at least " + + dstEndV + " was " + dst.capacity()); + } + + dst.limit(dstEndY); + dst.position(dstStartY); + final ByteBuffer dstY = dst.slice(); + dst.limit(dstEndU); + dst.position(dstStartU); + final ByteBuffer dstU = dst.slice(); + dst.limit(dstEndV); + dst.position(dstStartV); + final ByteBuffer dstV = dst.slice(); + + I420Copy(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dstY, dstStrideY, dstU, + dstStrideU, dstV, dstStrideU, dstWidth, dstHeight); + } + + /** Helper method for copying I420 to tightly packed destination buffer. */ + public static void I420Copy(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU, + ByteBuffer srcV, int srcStrideV, ByteBuffer dst, int dstWidth, int dstHeight) { + I420Copy(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dst, dstWidth, dstHeight, + dstWidth, dstHeight, (dstWidth + 1) / 2, (dstHeight + 1) / 2); + } + + /** + * Copy I420 Buffer to a contiguously allocated buffer. + * @param dstStrideY the stride of output buffers' Y plane. + * @param dstSliceHeightY the slice-height of output buffer's Y plane. + */ + public static void I420ToNV12(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU, + ByteBuffer srcV, int srcStrideV, ByteBuffer dst, int dstWidth, int dstHeight, int dstStrideY, + int dstSliceHeightY) { + final int chromaHeight = (dstHeight + 1) / 2; + final int chromaWidth = (dstWidth + 1) / 2; + + final int dstStartY = 0; + final int dstEndY = dstStartY + dstStrideY * dstHeight; + final int dstStartUV = dstStartY + dstStrideY * dstSliceHeightY; + final int dstEndUV = dstStartUV + chromaWidth * chromaHeight * 2; + if (dst.capacity() < dstEndUV) { + throw new IllegalArgumentException("Expected destination buffer capacity to be at least " + + dstEndUV + " was " + dst.capacity()); + } + + dst.limit(dstEndY); + dst.position(dstStartY); + final ByteBuffer dstY = dst.slice(); + dst.limit(dstEndUV); + dst.position(dstStartUV); + final ByteBuffer dstUV = dst.slice(); + + I420ToNV12(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dstY, dstStrideY, dstUV, + chromaWidth * 2, dstWidth, dstHeight); + } + + /** Helper method for copying I420 to tightly packed NV12 destination buffer. */ + public static void I420ToNV12(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU, + ByteBuffer srcV, int srcStrideV, ByteBuffer dst, int dstWidth, int dstHeight) { + I420ToNV12(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dst, dstWidth, dstHeight, + dstWidth, dstHeight); + } + + /** Helper method for rotating I420 to tightly packed destination buffer. */ + public static void I420Rotate(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU, + ByteBuffer srcV, int srcStrideV, ByteBuffer dst, int srcWidth, int srcHeight, + int rotationMode) { + final int dstWidth = rotationMode % 180 == 0 ? srcWidth : srcHeight; + final int dstHeight = rotationMode % 180 == 0 ? srcHeight : srcWidth; + + final int dstChromaHeight = (dstHeight + 1) / 2; + final int dstChromaWidth = (dstWidth + 1) / 2; + + final int minSize = dstWidth * dstHeight + dstChromaWidth * dstChromaHeight * 2; + if (dst.capacity() < minSize) { + throw new IllegalArgumentException("Expected destination buffer capacity to be at least " + + minSize + " was " + dst.capacity()); + } + + final int startY = 0; + final int startU = dstHeight * dstWidth; + final int startV = startU + dstChromaHeight * dstChromaWidth; + + dst.position(startY); + final ByteBuffer dstY = dst.slice(); + dst.position(startU); + final ByteBuffer dstU = dst.slice(); + dst.position(startV); + final ByteBuffer dstV = dst.slice(); + + nativeI420Rotate(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dstY, dstWidth, dstU, + dstChromaWidth, dstV, dstChromaWidth, srcWidth, srcHeight, rotationMode); + } + + /** Helper method for copying a single colour plane. */ + public static void copyPlane( + ByteBuffer src, int srcStride, ByteBuffer dst, int dstStride, int width, int height) { + nativeCopyPlane(src, srcStride, dst, dstStride, width, height); + } + + /** Converts ABGR little endian (rgba in memory) to I420. */ + public static void ABGRToI420(ByteBuffer src, int srcStride, ByteBuffer dstY, int dstStrideY, + ByteBuffer dstU, int dstStrideU, ByteBuffer dstV, int dstStrideV, int width, int height) { + nativeABGRToI420( + src, srcStride, dstY, dstStrideY, dstU, dstStrideU, dstV, dstStrideV, width, height); + } + + /** + * Copies I420 to the I420 dst buffer. + * <p> Unlike `libyuv::I420Copy`, this function checks if the height <= 0, so flipping is not + * supported. + */ + public static void I420Copy(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU, + ByteBuffer srcV, int srcStrideV, ByteBuffer dstY, int dstStrideY, ByteBuffer dstU, + int dstStrideU, ByteBuffer dstV, int dstStrideV, int width, int height) { + if (srcY == null || srcU == null || srcV == null || dstY == null || dstU == null || dstV == null + || width <= 0 || height <= 0) { + throw new IllegalArgumentException("Invalid I420Copy input arguments"); + } + nativeI420Copy(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dstY, dstStrideY, dstU, + dstStrideU, dstV, dstStrideV, width, height); + } + + public static void I420ToNV12(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU, + ByteBuffer srcV, int srcStrideV, ByteBuffer dstY, int dstStrideY, ByteBuffer dstUV, + int dstStrideUV, int width, int height) { + if (srcY == null || srcU == null || srcV == null || dstY == null || dstUV == null || width <= 0 + || height <= 0) { + throw new IllegalArgumentException("Invalid I420ToNV12 input arguments"); + } + nativeI420ToNV12(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dstY, dstStrideY, dstUV, + dstStrideUV, width, height); + } + + public static void I420Rotate(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU, + ByteBuffer srcV, int srcStrideV, ByteBuffer dstY, int dstStrideY, ByteBuffer dstU, + int dstStrideU, ByteBuffer dstV, int dstStrideV, int srcWidth, int srcHeight, + int rotationMode) { + nativeI420Rotate(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dstY, dstStrideY, dstU, + dstStrideU, dstV, dstStrideV, srcWidth, srcHeight, rotationMode); + } + + private static native void nativeCopyPlane( + ByteBuffer src, int srcStride, ByteBuffer dst, int dstStride, int width, int height); + private static native void nativeI420Copy(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, + int srcStrideU, ByteBuffer srcV, int srcStrideV, ByteBuffer dstY, int dstStrideY, + ByteBuffer dstU, int dstStrideU, ByteBuffer dstV, int dstStrideV, int width, int height); + private static native void nativeI420ToNV12(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, + int srcStrideU, ByteBuffer srcV, int srcStrideV, ByteBuffer dstY, int dstStrideY, + ByteBuffer dstUV, int dstStrideUV, int width, int height); + private static native void nativeI420Rotate(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, + int srcStrideU, ByteBuffer srcV, int srcStrideV, ByteBuffer dstY, int dstStrideY, + ByteBuffer dstU, int dstStrideU, ByteBuffer dstV, int dstStrideV, int srcWidth, int srcHeight, + int rotationMode); + private static native void nativeABGRToI420(ByteBuffer src, int srcStride, ByteBuffer dstY, + int dstStrideY, ByteBuffer dstU, int dstStrideU, ByteBuffer dstV, int dstStrideV, int width, + int height); +} |