Jetson Linux API Reference

32.7.3 Release
NvJpegDecoder.h
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2016-2018, NVIDIA CORPORATION. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * * Redistributions of source code must retain the above copyright
8  * notice, this list of conditions, and the following disclaimer.
9  * * Redistributions in binary form must reproduce the above copyright
10  * notice, this list of conditions and the following disclaimer in the
11  * documentation and/or other materials provided with the distribution.
12  * * Neither the name of NVIDIA CORPORATION nor the names of its
13  * contributors may be used to endorse or promote products derived
14  * from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
20  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
24  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
36 #ifndef __NV_JPEG_DECODER_H__
37 #define __NV_JPEG_DECODER_H__
38 
50 #ifndef TEGRA_ACCELERATE
51 
55 #define TEGRA_ACCELERATE
56 #endif
57 
58 #include <stdio.h>
59 #include "jpeglib.h"
60 #include "NvElement.h"
61 #include "NvBuffer.h"
62 
63 #ifndef MAX_CHANNELS
64 
68 #define MAX_CHANNELS 3
69 #endif
70 
87 {
88 public:
95  static NvJPEGDecoder *createJPEGDecoder(const char *comp_name);
97 
117  int decodeToFd(int &fd,
118  unsigned char *in_buf, unsigned long in_buf_size,
119  uint32_t &pixfmt, uint32_t &width, uint32_t &height);
146  int decodeToBuffer(NvBuffer ** buffer,
147  unsigned char *in_buf, unsigned long in_buf_size,
148  uint32_t *pixfmt, uint32_t *width, uint32_t *height);
149 
150 private:
151 
152  NvJPEGDecoder(const char *comp_name);
153  void decodeIndirect(NvBuffer *out_buf, uint32_t pixel_format);
154  void decodeDirect(NvBuffer *out_buf, uint32_t pixel_format);
155  struct jpeg_decompress_struct cinfo;
156  struct jpeg_error_mgr jerr;
157 
158  static const NvElementProfiler::ProfilerField valid_fields =
161 };
163 #endif
NvJPEGDecoder::createJPEGDecoder
static NvJPEGDecoder * createJPEGDecoder(const char *comp_name)
Creates a new JPEG Decoder named comp_name.
NvJPEGDecoder
Helper class for decoding JPEG images using libjpeg APIs.
Definition: NvJpegDecoder.h:86
NvElement::comp_name
const char * comp_name
Specifies the name of the component, for debugging.
Definition: NvElement.h:122
NvElementProfiler::ProfilerField
int ProfilerField
Definition: NvElementProfiler.h:79
NvJPEGDecoder::decodeToFd
int decodeToFd(int &fd, unsigned char *in_buf, unsigned long in_buf_size, uint32_t &pixfmt, uint32_t &width, uint32_t &height)
Decodes a JPEG image to hardware buffer memory.
NvElementProfiler::PROFILER_FIELD_LATENCIES
static const ProfilerField PROFILER_FIELD_LATENCIES
Definition: NvElementProfiler.h:83
NvJPEGDecoder::decodeToBuffer
int decodeToBuffer(NvBuffer **buffer, unsigned char *in_buf, unsigned long in_buf_size, uint32_t *pixfmt, uint32_t *width, uint32_t *height)
Decodes a JPEG image to software buffer memory.
NvElement
Every element has a unique name that can be used for identifying the element in debug logs.
Definition: NvElement.h:63
NvElementProfiler::PROFILER_FIELD_TOTAL_UNITS
static const ProfilerField PROFILER_FIELD_TOTAL_UNITS
Definition: NvElementProfiler.h:81
NvBuffer.h
NvJPEGDecoder::~NvJPEGDecoder
~NvJPEGDecoder()
NvElement.h
NvBuffer
Class representing a buffer.
Definition: NvBuffer.h:85