23 lines
968 B
Java
23 lines
968 B
Java
package br.carinha.rosto;
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import java.nio.ByteBuffer;
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/** Converts Camera2 planes to NV21, respecting padding and interleaved chroma. */
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public final class YuvFrame {
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public static byte[] nv21(int w, int h, ByteBuffer[] planes, int[] rows, int[] pixels) {
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if (w <= 0 || h <= 0 || (w & 1) != 0 || (h & 1) != 0)
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throw new IllegalArgumentException("YUV requires positive even dimensions");
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byte[] out = new byte[w * h * 3 / 2];
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int at = 0;
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for (int y = 0; y < h; y++)
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for (int x = 0; x < w; x++)
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out[at++] = planes[0].get(planes[0].position() + y * rows[0] + x * pixels[0]);
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for (int y = 0; y < h / 2; y++)
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for (int x = 0; x < w / 2; x++) {
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out[at++] = planes[2].get(planes[2].position() + y * rows[2] + x * pixels[2]);
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out[at++] = planes[1].get(planes[1].position() + y * rows[1] + x * pixels[1]);
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}
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return out;
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}
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}
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