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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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a05006944a
We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
412 lines
14 KiB
C
412 lines
14 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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#include <gst/codecparsers/codecparsers-prelude.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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GST_CODEC_PARSERS_API
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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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GST_CODEC_PARSERS_API
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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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GST_CODEC_PARSERS_API
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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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GST_CODEC_PARSERS_API
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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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GST_CODEC_PARSERS_API
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gboolean gst_jpeg_segment_parse_restart_interval (const GstJpegSegment * segment,
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guint * interval);
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GST_CODEC_PARSERS_API
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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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GST_CODEC_PARSERS_API
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void gst_jpeg_get_default_quantization_tables (GstJpegQuantTables * quant_tables);
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GST_CODEC_PARSERS_API
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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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