y12i-to-y16y16.cpp

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// License: Apache 2.0. See LICENSE file in root directory.
// Copyright(c) 2019 Intel Corporation. All Rights Reserved.

#include "y12i-to-y16y16.h"
#include "stream.h"
#ifdef RS2_USE_CUDA
#include "cuda/cuda-conversion.cuh"
#endif

namespace librealsense
{
    struct y12i_pixel { uint8_t rl : 8, rh : 4, ll : 4, lh : 8; int l() const { return lh << 4 | ll; } int r() const { return rh << 8 | rl; } };
    void unpack_y16_y16_from_y12i_10(byte * const dest[], const byte * source, int width, int height, int actual_size)
    {
        auto count = width * height;
#ifdef RS2_USE_CUDA
        rscuda::split_frame_y16_y16_from_y12i_cuda(dest, count, reinterpret_cast<const y12i_pixel *>(source));
#else
        split_frame(dest, count, reinterpret_cast<const y12i_pixel*>(source),
            [](const y12i_pixel & p) -> uint16_t { return p.l() << 6 | p.l() >> 4; },  // We want to convert 10-bit data to 16-bit data
            [](const y12i_pixel & p) -> uint16_t { return p.r() << 6 | p.r() >> 4; }); // Multiply by 64 1/16 to efficiently approximate 65535/1023
#endif
    }

    y12i_to_y16y16::y12i_to_y16y16(int left_idx, int right_idx)
        : y12i_to_y16y16("Y12I to Y16L Y16R Transform", left_idx, right_idx) {}

    y12i_to_y16y16::y12i_to_y16y16(const char * name, int left_idx, int right_idx)
        : interleaved_functional_processing_block(name, RS2_FORMAT_Y12I, RS2_FORMAT_Y16, RS2_STREAM_INFRARED, RS2_EXTENSION_VIDEO_FRAME, 1,
                                                                         RS2_FORMAT_Y16, RS2_STREAM_INFRARED, RS2_EXTENSION_VIDEO_FRAME, 2)
    {}

    void y12i_to_y16y16::process_function(byte * const dest[], const byte * source, int width, int height, int actual_size, int input_size)
    {
        unpack_y16_y16_from_y12i_10(dest, source, width, height, actual_size);
    }
}