NvJpegDecoder.h

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/*
 * Copyright (c) 2016-2018, NVIDIA CORPORATION. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *  * Neither the name of NVIDIA CORPORATION nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef __NV_JPEG_DECODER_H__
#define __NV_JPEG_DECODER_H__
 
#ifndef TEGRA_ACCELERATE
 
#define TEGRA_ACCELERATE
#endif
 
#include <stdio.h>
#include "jpeglib.h"
#include "NvElement.h"
#include "NvBuffer.h"
 
#ifndef MAX_CHANNELS
 
#define MAX_CHANNELS 3
#endif
 
class NvJPEGDecoder:public NvElement
{
public:
    static NvJPEGDecoder *createJPEGDecoder(const char *comp_name);
     ~NvJPEGDecoder();
 
    int decodeToFd(int &fd,
                     unsigned char *in_buf, unsigned long in_buf_size,
                     uint32_t &pixfmt, uint32_t &width, uint32_t &height);
    int decodeToBuffer(NvBuffer ** buffer,
                         unsigned char *in_buf, unsigned long in_buf_size,
                         uint32_t *pixfmt, uint32_t *width, uint32_t *height);
 
private:
 
    NvJPEGDecoder(const char *comp_name);
    void decodeIndirect(NvBuffer *out_buf, uint32_t pixel_format);
    void decodeDirect(NvBuffer *out_buf, uint32_t pixel_format);
    struct jpeg_decompress_struct cinfo;
    struct jpeg_error_mgr jerr;
 
    static const NvElementProfiler::ProfilerField valid_fields =
            NvElementProfiler::PROFILER_FIELD_TOTAL_UNITS |
            NvElementProfiler::PROFILER_FIELD_LATENCIES;
};
#endif