Function stbi__jpeg_get_bit

lite/example/cpp_example/mge/cv/stb_image.h:2327–2335

}

stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg* j) {
    unsigned int k;
    if (j->code_bits < 1)
        stbi__grow_buffer_unsafe(j);
    k = j->code_buffer;
    j->code_buffer <<= 1;
    --j->code_bits;
    return k & 0x80000000;
}

// given a value that's at position X in the zigzag stream,
// where does it appear in the 8x8 matrix coded as row-major?