0 votes
in Education by (1.7m points)
In our application, we need to transfer video, we are using Camera class to capture the buffer and send to destination,

I have set format is YV12 as a Camera parameter to receive the buffer,

for the 500X300 buffer, we receive buffer of 230400 bytes,

i want to know , is this expected buffer size ?

I believe the size would be

Y Plane = width * height = 500X300 = 150000

U Plane = width/2 * height/2 = = 37500

V Plane = width/2 * height/2 = = 37500

                               ========

                                 225000                                     

                               ========

Can anyone explain me, if i need to get stride values of each component, how can i get that

Is there any way to get it ?

JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

1 Answer

0 votes
by (1.7m points)
I can show you how you can get int rgb[] from this:

public int[] decodeYUV420SP(byte[] yuv420sp, int width, int height) {

        final int frameSize = width * height;

        int rgb[] = new int[width * height];

        for (int j = 0, yp = 0; j < height; j++) {

            int uvp = frameSize + (j >> 1) * width, u = 0, v = 0;

            for (int i = 0; i < width; i++, yp++) {

                int y = (0xff & ((int) yuv420sp[yp])) - 16;

                if (y < 0)

                    y = 0;

                if ((i & 1) == 0) {

                    v = (0xff & yuv420sp[uvp++]) - 128;

                    u = (0xff & yuv420sp[uvp++]) - 128;

                }

                int y1192 = 1192 * y;

                int r = (y1192 + 1634 * v);

                int g = (y1192 - 833 * v - 400 * u);

                int b = (y1192 + 2066 * u);

                if (r < 0)

                    r = 0;

                else if (r > 262143)

                    r = 262143;

                if (g < 0)

                    g = 0;

                else if (g > 262143)

                    g = 262143;

                if (b < 0)

                    b = 0;

                else if (b > 262143)

                    b = 262143;

                rgb[yp] = 0xff000000 | ((r << 6) & 0xff0000)

                        | ((g >> 2) & 0xff00) | ((b >> 10) & 0xff);

            }

        }

        return rgb;

    }
...