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403 lines
13 KiB
C
403 lines
13 KiB
C
/* GStreamer JPEG parser
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* Copyright (C) 2011-2012 Intel Corporation
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* Copyright (C) 2015 Tim-Philipp Müller <tim@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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#ifndef GST_JPEG_PARSER_H
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#define GST_JPEG_PARSER_H
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#ifndef GST_USE_UNSTABLE_API
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# warning "The JPEG parsing library is unstable API and may change in future."
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# warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
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#endif
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#include <gst/gst.h>
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G_BEGIN_DECLS
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/**
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* GST_JPEG_MAX_FRAME_COMPONENTS:
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*
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* Maximum number of image components in a frame (Nf).
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*
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* Since: 1.6
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*/
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#define GST_JPEG_MAX_FRAME_COMPONENTS 256
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/**
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* GST_JPEG_MAX_SCAN_COMPONENTS:
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*
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* Maximum number of image components in a scan (Ns).
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*
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* Since: 1.6
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*/
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#define GST_JPEG_MAX_SCAN_COMPONENTS 4
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/**
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* GST_JPEG_MAX_QUANT_ELEMENTS:
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*
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* Number of elements in the quantization table.
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*
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* Since: 1.6
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*/
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#define GST_JPEG_MAX_QUANT_ELEMENTS 64
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typedef struct _GstJpegQuantTable GstJpegQuantTable;
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typedef struct _GstJpegQuantTables GstJpegQuantTables;
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typedef struct _GstJpegHuffmanTable GstJpegHuffmanTable;
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typedef struct _GstJpegHuffmanTables GstJpegHuffmanTables;
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typedef struct _GstJpegScanComponent GstJpegScanComponent;
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typedef struct _GstJpegScanHdr GstJpegScanHdr;
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typedef struct _GstJpegFrameComponent GstJpegFrameComponent;
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typedef struct _GstJpegFrameHdr GstJpegFrameHdr;
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typedef struct _GstJpegSegment GstJpegSegment;
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/**
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* GstJpegMarker:
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* @GST_JPEG_MARKER_SOF0: Start of frame marker code (Baseline)
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* @GST_JPEG_MARKER_SOF1: Start of frame marker code (Extended Sequential, Huffman)
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* @GST_JPEG_MARKER_SOF2: Start of frame marker code (Progressive, Huffman)
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* @GST_JPEG_MARKER_SOF3: Start of frame marker code (Lossless, Huffman)
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* @GST_JPEG_MARKER_SOF5: Start of frame marker code (Differential Sequential, Huffman)
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* @GST_JPEG_MARKER_SOF6: Start of frame marker code (Differential Progressive, Huffman)
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* @GST_JPEG_MARKER_SOF7: Start of frame marker code (Differential Lossless, Huffman)
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* @GST_JPEG_MARKER_SOF9: Start of frame marker code (Extended Sequential, Arithmetic)
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* @GST_JPEG_MARKER_SOF10: Start of frame marker code (Progressive, Arithmetic)
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* @GST_JPEG_MARKER_SOF11: Start of frame marker code (Lossless, Arithmetic)
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* @GST_JPEG_MARKER_SOF13: Start of frame marker code (Differential Sequential, Arithmetic)
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* @GST_JPEG_MARKER_SOF14: Start of frame marker code (Differential Progressive, Arithmetic)
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* @GST_JPEG_MARKER_SOF15: Start of frame marker code (Differential Lossless, Arithmetic)
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* @GST_JPEG_MARKER_DHT: Huffman table marker code
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* @GST_JPEG_MARKER_DAC: Arithmetic coding marker code
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* @GST_JPEG_MARKER_RST_MIN: Restart interval min marker code
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* @GST_JPEG_MARKER_RST_MAX: Restart interval max marker code
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* @GST_JPEG_MARKER_SOI: Start of image marker code
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* @GST_JPEG_MARKER_EOI: End of image marker code
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* @GST_JPEG_MARKER_SOS: Start of scan marker code
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* @GST_JPEG_MARKER_DQT: Define quantization table marker code
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* @GST_JPEG_MARKER_DNL: Define number of lines marker code
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* @GST_JPEG_MARKER_DRI: Define restart interval marker code
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* @GST_JPEG_MARKER_APP0: Application segment 0 marker code
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* @GST_JPEG_MARKER_APP1: Application segment 1 marker code
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* @GST_JPEG_MARKER_APP2: Application segment 2 marker code
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* @GST_JPEG_MARKER_APP3: Application segment 3 marker code
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* @GST_JPEG_MARKER_APP4: Application segment 4 marker code
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* @GST_JPEG_MARKER_APP5: Application segment 5 marker code
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* @GST_JPEG_MARKER_APP6: Application segment 6 marker code
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* @GST_JPEG_MARKER_APP7: Application segment 7 marker code
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* @GST_JPEG_MARKER_APP8: Application segment 8 marker code
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* @GST_JPEG_MARKER_APP9: Application segment 9 marker code
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* @GST_JPEG_MARKER_APP10: Application segment 10 marker code
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* @GST_JPEG_MARKER_APP11: Application segment 11 marker code
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* @GST_JPEG_MARKER_APP12: Application segment 12 marker code
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* @GST_JPEG_MARKER_APP13: Application segment 13 marker code
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* @GST_JPEG_MARKER_APP14: Application segment 14 marker code
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* @GST_JPEG_MARKER_APP15: Application segment 15 marker code
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* @GST_JPEG_MARKER_COM: Comment marker code
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*
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* Indicates the type of JPEG segment.
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*
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* Since: 1.6
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*/
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typedef enum {
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GST_JPEG_MARKER_SOF0 = 0xC0,
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GST_JPEG_MARKER_SOF1 = 0xC1,
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GST_JPEG_MARKER_SOF2 = 0xC2,
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GST_JPEG_MARKER_SOF3 = 0xC3,
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/* 0xC4 = DHT see below */
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GST_JPEG_MARKER_SOF5 = 0xC5,
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GST_JPEG_MARKER_SOF6 = 0xC6,
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GST_JPEG_MARKER_SOF7 = 0xC7,
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/* 0xC8 = reserved */
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GST_JPEG_MARKER_SOF9 = 0xC9,
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GST_JPEG_MARKER_SOF10 = 0xCA,
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GST_JPEG_MARKER_SOF11 = 0xCB,
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/* 0xCC = DAC see below */
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GST_JPEG_MARKER_SOF13 = 0xCD,
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GST_JPEG_MARKER_SOF14 = 0xCE,
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GST_JPEG_MARKER_SOF15 = 0xCF,
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GST_JPEG_MARKER_DHT = 0xC4,
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GST_JPEG_MARKER_DAC = 0xCC,
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GST_JPEG_MARKER_RST0 = 0xD0,
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GST_JPEG_MARKER_RST1 = 0xD1,
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GST_JPEG_MARKER_RST2 = 0xD2,
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GST_JPEG_MARKER_RST3 = 0xD3,
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GST_JPEG_MARKER_RST4 = 0xD4,
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GST_JPEG_MARKER_RST5 = 0xD5,
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GST_JPEG_MARKER_RST6 = 0xD6,
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GST_JPEG_MARKER_RST7 = 0xD7,
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GST_JPEG_MARKER_SOI = 0xD8,
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GST_JPEG_MARKER_EOI = 0xD9,
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GST_JPEG_MARKER_SOS = 0xDA,
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GST_JPEG_MARKER_DQT = 0xDB,
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GST_JPEG_MARKER_DNL = 0xDC,
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GST_JPEG_MARKER_DRI = 0xDD,
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GST_JPEG_MARKER_APP0 = 0xE0,
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GST_JPEG_MARKER_APP1 = 0xE1,
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GST_JPEG_MARKER_APP2 = 0xE2,
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GST_JPEG_MARKER_APP3 = 0xE3,
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GST_JPEG_MARKER_APP4 = 0xE4,
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GST_JPEG_MARKER_APP5 = 0xE5,
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GST_JPEG_MARKER_APP6 = 0xE6,
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GST_JPEG_MARKER_APP7 = 0xE7,
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GST_JPEG_MARKER_APP8 = 0xE8,
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GST_JPEG_MARKER_APP9 = 0xE9,
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GST_JPEG_MARKER_APP10 = 0xEA,
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GST_JPEG_MARKER_APP11 = 0xEB,
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GST_JPEG_MARKER_APP12 = 0xEC,
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GST_JPEG_MARKER_APP13 = 0xED,
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GST_JPEG_MARKER_APP14 = 0xEE,
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GST_JPEG_MARKER_APP15 = 0xEF,
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GST_JPEG_MARKER_COM = 0xFE,
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} GstJpegMarker;
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#define GST_JPEG_MARKER_SOF_MIN GST_JPEG_MARKER_SOF0
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#define GST_JPEG_MARKER_SOF_MAX GST_JPEG_MARKER_SOF15
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#define GST_JPEG_MARKER_APP_MIN GST_JPEG_MARKER_APP0
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#define GST_JPEG_MARKER_APP_MAX GST_JPEG_MARKER_APP15
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#define GST_JPEG_MARKER_RST_MIN GST_JPEG_MARKER_RST0
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#define GST_JPEG_MARKER_RST_MAX GST_JPEG_MARKER_RST7
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/**
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* GstJpegProfile:
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* @GST_JPEG_PROFILE_BASELINE: Baseline DCT
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* @GST_JPEG_PROFILE_EXTENDED: Extended sequential DCT
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* @GST_JPEG_PROFILE_PROGRESSIVE: Progressive DCT
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* @GST_JPEG_PROFILE_LOSSLESS: Lossless (sequential)
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*
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* JPEG encoding processes.
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*
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* Since: 1.6
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*/
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typedef enum {
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GST_JPEG_PROFILE_BASELINE = 0x00,
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GST_JPEG_PROFILE_EXTENDED = 0x01,
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GST_JPEG_PROFILE_PROGRESSIVE = 0x02,
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GST_JPEG_PROFILE_LOSSLESS = 0x03,
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} GstJpegProfile;
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/**
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* GstJpegEntropyCodingMode:
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* @GST_JPEG_ENTROPY_CODING_HUFFMAN: Huffman coding
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* @GST_JPEG_ENTROPY_CODING_ARITHMETIC: arithmetic coding
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*
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* JPEG entropy coding mode.
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*
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* Since: 1.6
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*/
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typedef enum {
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GST_JPEG_ENTROPY_CODING_HUFFMAN = 0x00,
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GST_JPEG_ENTROPY_CODING_ARITHMETIC = 0x08
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} GstJpegEntropyCodingMode;
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/**
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* GstJpegQuantTable:
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* @quant_precision: Quantization table element precision (Pq)
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* @quant_table: Quantization table elements (Qk)
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* @valid: If the quantization table is valid, which means it has
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* already been parsed
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*
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* Quantization table.
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*
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* Since: 1.6
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*/
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struct _GstJpegQuantTable
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{
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guint8 quant_precision;
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guint16 quant_table[GST_JPEG_MAX_QUANT_ELEMENTS];
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gboolean valid;
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};
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/**
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* GstJpegQuantTables:
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* @quant_tables: All quantization tables
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*
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* Helper data structure that holds all quantization tables used to
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* decode an image.
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*
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* Since: 1.6
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*/
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struct _GstJpegQuantTables
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{
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GstJpegQuantTable quant_tables[GST_JPEG_MAX_SCAN_COMPONENTS];
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};
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/**
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* GstJpegHuffmanTable:
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* @huf_bits: Number of Huffman codes of length i + 1 (Li)
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* @huf_vales: Value associated with each Huffman code (Vij)
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* @valid: If the Huffman table is valid, which means it has already
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* been parsed
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*
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* Huffman table.
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*
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* Since: 1.6
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*/
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struct _GstJpegHuffmanTable
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{
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guint8 huf_bits[16];
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guint8 huf_values[256];
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gboolean valid;
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};
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/**
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* GstJpegHuffmanTables:
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* @dc_tables: DC Huffman tables
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* @ac_tables: AC Huffman tables
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*
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* Helper data structure that holds all AC/DC Huffman tables used to
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* decode an image.
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*
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* Since: 1.6
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*/
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struct _GstJpegHuffmanTables
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{
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GstJpegHuffmanTable dc_tables[GST_JPEG_MAX_SCAN_COMPONENTS];
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GstJpegHuffmanTable ac_tables[GST_JPEG_MAX_SCAN_COMPONENTS];
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};
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/**
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* GstJpegScanComponent:
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* @component_selector: Scan component selector (Csj)
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* @dc_selector: DC entropy coding table destination selector (Tdj)
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* @ac_selector: AC entropy coding table destination selector (Taj)
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* Component-specification parameters.
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*
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* Since: 1.6
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*/
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struct _GstJpegScanComponent
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{
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guint8 component_selector; /* 0 .. 255 */
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guint8 dc_selector; /* 0 .. 3 */
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guint8 ac_selector; /* 0 .. 3 */
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};
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/**
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* GstJpegScanHdr:
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* @num_components: Number of image components in scan (Ns)
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* @components: Image components
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*
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* Scan header.
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*
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* Since: 1.6
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*/
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struct _GstJpegScanHdr
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{
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guint8 num_components; /* 1 .. 4 */
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GstJpegScanComponent components[GST_JPEG_MAX_SCAN_COMPONENTS];
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/*< private >*/
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guint8 _reserved1; /* Ss */
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guint8 _reserved2; /* Se */
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guint8 _reserved3; /* Al */
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guint8 _reserved4; /* Ah */
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};
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/**
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* GstJpegFrameComponent:
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* @identifier: Component identifier (Ci)
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* @horizontal_factor: Horizontal sampling factor (Hi)
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* @vertical_factor: Vertical sampling factor (Vi)
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* @quant_table_selector: Quantization table destination selector (Tqi)
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*
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* Component-specification parameters.
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*
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* Since: 1.6
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*/
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struct _GstJpegFrameComponent
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{
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guint8 identifier; /* 0 .. 255 */
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guint8 horizontal_factor; /* 1 .. 4 */
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guint8 vertical_factor; /* 1 .. 4 */
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guint8 quant_table_selector; /* 0 .. 3 */
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};
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/**
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* GstJpegFrameHdr:
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* @sample_precision: Sample precision (P)
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* @height: Number of lines (Y)
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* @width: Number of samples per line (X)
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* @num_components: Number of image components in frame (Nf)
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* @components: Image components
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* @restart_interval: Number of MCU in the restart interval (Ri)
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*
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* Frame header.
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*
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* Since: 1.6
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*/
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struct _GstJpegFrameHdr
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{
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guint8 sample_precision; /* 2 .. 16 */
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guint16 width; /* 1 .. 65535 */
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guint16 height; /* 0 .. 65535 */
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guint8 num_components; /* 1 .. 255 */
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GstJpegFrameComponent components[GST_JPEG_MAX_FRAME_COMPONENTS];
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};
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/**
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* GstJpegSegment:
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* @marker: The type of the segment that starts at @offset
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* @data: the data containing the jpeg segment starting at @offset
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* @offset: The offset to the segment start in bytes. This is the
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* exact start of the segment, no marker code included
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* @size: The size of the segment in bytes, or -1 if the end was not
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* found. It is the exact size of the segment, without the sync byte and
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* marker code but including any length bytes.
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*
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* A structure that contains the type of a segment, its offset and its size.
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*
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* Since: 1.6
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*/
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struct _GstJpegSegment
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{
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GstJpegMarker marker;
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const guint8 *data;
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guint offset;
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gssize size;
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};
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gboolean gst_jpeg_parse (GstJpegSegment * seg,
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const guint8 * data,
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gsize size,
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guint offset);
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gboolean gst_jpeg_segment_parse_frame_header (const GstJpegSegment * segment,
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GstJpegFrameHdr * frame_hdr);
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gboolean gst_jpeg_segment_parse_scan_header (const GstJpegSegment * segment,
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GstJpegScanHdr * scan_hdr);
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gboolean gst_jpeg_segment_parse_huffman_table (const GstJpegSegment * segment,
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GstJpegHuffmanTables * huff_tables);
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gboolean gst_jpeg_segment_parse_restart_interval (const GstJpegSegment * segment,
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guint * interval);
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gboolean gst_jpeg_segment_parse_quantization_table (const GstJpegSegment * segment,
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GstJpegQuantTables * quant_tables);
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void gst_jpeg_get_default_quantization_tables (GstJpegQuantTables * quant_tables);
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void gst_jpeg_get_default_huffman_tables (GstJpegHuffmanTables * huff_tables);
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G_END_DECLS
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#endif /* GST_JPEG_PARSER_H */
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