NvJpegDecoder.h

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/*
 * SPDX-FileCopyrightText: Copyright (c) 2016-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. Neither the name of the copyright holder 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 AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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#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);
 
    void disableMjpegDecode();
 
    bool isGPUEnabled() { return gpu_enabled; }
 
    void setGPUId(uint32_t gpu_id);
 
    void setMemType(uint32_t mem_type);
 
    void setUseExternalBuffer(bool use_external_buffer);
 
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;
    bool gpu_enabled;
    int out_fd;
 
    static const NvElementProfiler::ProfilerField valid_fields =
            NvElementProfiler::PROFILER_FIELD_TOTAL_UNITS |
            NvElementProfiler::PROFILER_FIELD_LATENCIES;
};
#endif