1 /*
2  *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 package org.webrtc;
12 
13 import java.nio.ByteBuffer;
14 
15 /** Wraps libyuv methods to Java. All passed byte buffers must be direct byte buffers. */
16 public class YuvHelper {
17   /** Helper method for copying I420 to tightly packed destination buffer. */
I420Copy(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU, ByteBuffer srcV, int srcStrideV, ByteBuffer dst, int width, int height)18   public static void I420Copy(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU,
19       ByteBuffer srcV, int srcStrideV, ByteBuffer dst, int width, int height) {
20     final int chromaHeight = (height + 1) / 2;
21     final int chromaWidth = (width + 1) / 2;
22 
23     final int minSize = width * height + chromaWidth * chromaHeight * 2;
24     if (dst.capacity() < minSize) {
25       throw new IllegalArgumentException("Expected destination buffer capacity to be at least "
26           + minSize + " was " + dst.capacity());
27     }
28 
29     final int startY = 0;
30     final int startU = height * width;
31     final int startV = startU + chromaHeight * chromaWidth;
32 
33     dst.position(startY);
34     final ByteBuffer dstY = dst.slice();
35     dst.position(startU);
36     final ByteBuffer dstU = dst.slice();
37     dst.position(startV);
38     final ByteBuffer dstV = dst.slice();
39 
40     nativeI420Copy(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dstY, width, dstU,
41         chromaWidth, dstV, chromaWidth, width, height);
42   }
43 
44   /** Helper method for copying I420 to tightly packed NV12 destination buffer. */
I420ToNV12(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU, ByteBuffer srcV, int srcStrideV, ByteBuffer dst, int width, int height)45   public static void I420ToNV12(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU,
46       ByteBuffer srcV, int srcStrideV, ByteBuffer dst, int width, int height) {
47     final int chromaWidth = (width + 1) / 2;
48     final int chromaHeight = (height + 1) / 2;
49 
50     final int minSize = width * height + chromaWidth * chromaHeight * 2;
51     if (dst.capacity() < minSize) {
52       throw new IllegalArgumentException("Expected destination buffer capacity to be at least "
53           + minSize + " was " + dst.capacity());
54     }
55 
56     final int startY = 0;
57     final int startUV = height * width;
58 
59     dst.position(startY);
60     final ByteBuffer dstY = dst.slice();
61     dst.position(startUV);
62     final ByteBuffer dstUV = dst.slice();
63 
64     nativeI420ToNV12(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dstY, width, dstUV,
65         chromaWidth * 2, width, height);
66   }
67 
68   /** Helper method for rotating I420 to tightly packed destination buffer. */
I420Rotate(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU, ByteBuffer srcV, int srcStrideV, ByteBuffer dst, int srcWidth, int srcHeight, int rotationMode)69   public static void I420Rotate(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU,
70       ByteBuffer srcV, int srcStrideV, ByteBuffer dst, int srcWidth, int srcHeight,
71       int rotationMode) {
72     final int dstWidth = rotationMode % 180 == 0 ? srcWidth : srcHeight;
73     final int dstHeight = rotationMode % 180 == 0 ? srcHeight : srcWidth;
74 
75     final int dstChromaHeight = (dstHeight + 1) / 2;
76     final int dstChromaWidth = (dstWidth + 1) / 2;
77 
78     final int minSize = dstWidth * dstHeight + dstChromaWidth * dstChromaHeight * 2;
79     if (dst.capacity() < minSize) {
80       throw new IllegalArgumentException("Expected destination buffer capacity to be at least "
81           + minSize + " was " + dst.capacity());
82     }
83 
84     final int startY = 0;
85     final int startU = dstHeight * dstWidth;
86     final int startV = startU + dstChromaHeight * dstChromaWidth;
87 
88     dst.position(startY);
89     final ByteBuffer dstY = dst.slice();
90     dst.position(startU);
91     final ByteBuffer dstU = dst.slice();
92     dst.position(startV);
93     final ByteBuffer dstV = dst.slice();
94 
95     nativeI420Rotate(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dstY, dstWidth, dstU,
96         dstChromaWidth, dstV, dstChromaWidth, srcWidth, srcHeight, rotationMode);
97   }
98 
99   /** Helper method for copying a single colour plane. */
copyPlane( ByteBuffer src, int srcStride, ByteBuffer dst, int dstStride, int width, int height)100   public static void copyPlane(
101       ByteBuffer src, int srcStride, ByteBuffer dst, int dstStride, int width, int height) {
102     nativeCopyPlane(src, srcStride, dst, dstStride, width, height);
103   }
104 
105   /** Converts ABGR little endian (rgba in memory) to I420. */
ABGRToI420(ByteBuffer src, int srcStride, ByteBuffer dstY, int dstStrideY, ByteBuffer dstU, int dstStrideU, ByteBuffer dstV, int dstStrideV, int width, int height)106   public static void ABGRToI420(ByteBuffer src, int srcStride, ByteBuffer dstY, int dstStrideY,
107       ByteBuffer dstU, int dstStrideU, ByteBuffer dstV, int dstStrideV, int width, int height) {
108     nativeABGRToI420(
109         src, srcStride, dstY, dstStrideY, dstU, dstStrideU, dstV, dstStrideV, width, height);
110   }
111 
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)112   public static void I420Copy(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU,
113       ByteBuffer srcV, int srcStrideV, ByteBuffer dstY, int dstStrideY, ByteBuffer dstU,
114       int dstStrideU, ByteBuffer dstV, int dstStrideV, int width, int height) {
115     nativeI420Copy(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dstY, dstStrideY, dstU,
116         dstStrideU, dstV, dstStrideV, width, height);
117   }
118 
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)119   public static void I420ToNV12(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU,
120       ByteBuffer srcV, int srcStrideV, ByteBuffer dstY, int dstStrideY, ByteBuffer dstUV,
121       int dstStrideUV, int width, int height) {
122     nativeI420ToNV12(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dstY, dstStrideY, dstUV,
123         dstStrideUV, width, height);
124   }
125 
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)126   public static void I420Rotate(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU, int srcStrideU,
127       ByteBuffer srcV, int srcStrideV, ByteBuffer dstY, int dstStrideY, ByteBuffer dstU,
128       int dstStrideU, ByteBuffer dstV, int dstStrideV, int srcWidth, int srcHeight,
129       int rotationMode) {
130     nativeI420Rotate(srcY, srcStrideY, srcU, srcStrideU, srcV, srcStrideV, dstY, dstStrideY, dstU,
131         dstStrideU, dstV, dstStrideV, srcWidth, srcHeight, rotationMode);
132   }
133 
nativeCopyPlane( ByteBuffer src, int srcStride, ByteBuffer dst, int dstStride, int width, int height)134   private static native void nativeCopyPlane(
135       ByteBuffer src, int srcStride, ByteBuffer dst, int dstStride, int width, int height);
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)136   private static native void nativeI420Copy(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU,
137       int srcStrideU, ByteBuffer srcV, int srcStrideV, ByteBuffer dstY, int dstStrideY,
138       ByteBuffer dstU, int dstStrideU, ByteBuffer dstV, int dstStrideV, int width, int height);
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)139   private static native void nativeI420ToNV12(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU,
140       int srcStrideU, ByteBuffer srcV, int srcStrideV, ByteBuffer dstY, int dstStrideY,
141       ByteBuffer dstUV, int dstStrideUV, int width, int height);
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)142   private static native void nativeI420Rotate(ByteBuffer srcY, int srcStrideY, ByteBuffer srcU,
143       int srcStrideU, ByteBuffer srcV, int srcStrideV, ByteBuffer dstY, int dstStrideY,
144       ByteBuffer dstU, int dstStrideU, ByteBuffer dstV, int dstStrideV, int srcWidth, int srcHeight,
145       int rotationMode);
nativeABGRToI420(ByteBuffer src, int srcStride, ByteBuffer dstY, int dstStrideY, ByteBuffer dstU, int dstStrideU, ByteBuffer dstV, int dstStrideV, int width, int height)146   private static native void nativeABGRToI420(ByteBuffer src, int srcStride, ByteBuffer dstY,
147       int dstStrideY, ByteBuffer dstU, int dstStrideU, ByteBuffer dstV, int dstStrideV, int width,
148       int height);
149 }
150