mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-13 21:01:14 +00:00
403 lines
13 KiB
C
403 lines
13 KiB
C
/* GStreamer JPEG parser
|
|
* Copyright (C) 2011-2012 Intel Corporation
|
|
* Copyright (C) 2015 Tim-Philipp Müller <tim@centricular.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public License
|
|
* as published by the Free Software Foundation; either version 2.1
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free
|
|
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef GST_JPEG_PARSER_H
|
|
#define GST_JPEG_PARSER_H
|
|
|
|
#ifndef GST_USE_UNSTABLE_API
|
|
# warning "The JPEG parsing library is unstable API and may change in future."
|
|
# warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
|
|
#endif
|
|
|
|
#include <gst/gst.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
/**
|
|
* GST_JPEG_MAX_FRAME_COMPONENTS:
|
|
*
|
|
* Maximum number of image components in a frame (Nf).
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
#define GST_JPEG_MAX_FRAME_COMPONENTS 256
|
|
|
|
/**
|
|
* GST_JPEG_MAX_SCAN_COMPONENTS:
|
|
*
|
|
* Maximum number of image components in a scan (Ns).
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
#define GST_JPEG_MAX_SCAN_COMPONENTS 4
|
|
|
|
/**
|
|
* GST_JPEG_MAX_QUANT_ELEMENTS:
|
|
*
|
|
* Number of elements in the quantization table.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
#define GST_JPEG_MAX_QUANT_ELEMENTS 64
|
|
|
|
typedef struct _GstJpegQuantTable GstJpegQuantTable;
|
|
typedef struct _GstJpegQuantTables GstJpegQuantTables;
|
|
typedef struct _GstJpegHuffmanTable GstJpegHuffmanTable;
|
|
typedef struct _GstJpegHuffmanTables GstJpegHuffmanTables;
|
|
typedef struct _GstJpegScanComponent GstJpegScanComponent;
|
|
typedef struct _GstJpegScanHdr GstJpegScanHdr;
|
|
typedef struct _GstJpegFrameComponent GstJpegFrameComponent;
|
|
typedef struct _GstJpegFrameHdr GstJpegFrameHdr;
|
|
typedef struct _GstJpegSegment GstJpegSegment;
|
|
|
|
/**
|
|
* GstJpegMarker:
|
|
* @GST_JPEG_MARKER_SOF0: Start of frame marker code (Baseline)
|
|
* @GST_JPEG_MARKER_SOF1: Start of frame marker code (Extended Sequential, Huffman)
|
|
* @GST_JPEG_MARKER_SOF2: Start of frame marker code (Progressive, Huffman)
|
|
* @GST_JPEG_MARKER_SOF3: Start of frame marker code (Lossless, Huffman)
|
|
* @GST_JPEG_MARKER_SOF5: Start of frame marker code (Differential Sequential, Huffman)
|
|
* @GST_JPEG_MARKER_SOF6: Start of frame marker code (Differential Progressive, Huffman)
|
|
* @GST_JPEG_MARKER_SOF7: Start of frame marker code (Differential Lossless, Huffman)
|
|
* @GST_JPEG_MARKER_SOF9: Start of frame marker code (Extended Sequential, Arithmetic)
|
|
* @GST_JPEG_MARKER_SOF10: Start of frame marker code (Progressive, Arithmetic)
|
|
* @GST_JPEG_MARKER_SOF11: Start of frame marker code (Lossless, Arithmetic)
|
|
* @GST_JPEG_MARKER_SOF13: Start of frame marker code (Differential Sequential, Arithmetic)
|
|
* @GST_JPEG_MARKER_SOF14: Start of frame marker code (Differential Progressive, Arithmetic)
|
|
* @GST_JPEG_MARKER_SOF15: Start of frame marker code (Differential Lossless, Arithmetic)
|
|
* @GST_JPEG_MARKER_DHT: Huffman table marker code
|
|
* @GST_JPEG_MARKER_DAC: Arithmetic coding marker code
|
|
* @GST_JPEG_MARKER_RST_MIN: Restart interval min marker code
|
|
* @GST_JPEG_MARKER_RST_MAX: Restart interval max marker code
|
|
* @GST_JPEG_MARKER_SOI: Start of image marker code
|
|
* @GST_JPEG_MARKER_EOI: End of image marker code
|
|
* @GST_JPEG_MARKER_SOS: Start of scan marker code
|
|
* @GST_JPEG_MARKER_DQT: Define quantization table marker code
|
|
* @GST_JPEG_MARKER_DNL: Define number of lines marker code
|
|
* @GST_JPEG_MARKER_DRI: Define restart interval marker code
|
|
* @GST_JPEG_MARKER_APP0: Application segment 0 marker code
|
|
* @GST_JPEG_MARKER_APP1: Application segment 1 marker code
|
|
* @GST_JPEG_MARKER_APP2: Application segment 2 marker code
|
|
* @GST_JPEG_MARKER_APP3: Application segment 3 marker code
|
|
* @GST_JPEG_MARKER_APP4: Application segment 4 marker code
|
|
* @GST_JPEG_MARKER_APP5: Application segment 5 marker code
|
|
* @GST_JPEG_MARKER_APP6: Application segment 6 marker code
|
|
* @GST_JPEG_MARKER_APP7: Application segment 7 marker code
|
|
* @GST_JPEG_MARKER_APP8: Application segment 8 marker code
|
|
* @GST_JPEG_MARKER_APP9: Application segment 9 marker code
|
|
* @GST_JPEG_MARKER_APP10: Application segment 10 marker code
|
|
* @GST_JPEG_MARKER_APP11: Application segment 11 marker code
|
|
* @GST_JPEG_MARKER_APP12: Application segment 12 marker code
|
|
* @GST_JPEG_MARKER_APP13: Application segment 13 marker code
|
|
* @GST_JPEG_MARKER_APP14: Application segment 14 marker code
|
|
* @GST_JPEG_MARKER_APP15: Application segment 15 marker code
|
|
* @GST_JPEG_MARKER_COM: Comment marker code
|
|
*
|
|
* Indicates the type of JPEG segment.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
typedef enum {
|
|
GST_JPEG_MARKER_SOF0 = 0xC0,
|
|
GST_JPEG_MARKER_SOF1 = 0xC1,
|
|
GST_JPEG_MARKER_SOF2 = 0xC2,
|
|
GST_JPEG_MARKER_SOF3 = 0xC3,
|
|
/* 0xC4 = DHT see below */
|
|
GST_JPEG_MARKER_SOF5 = 0xC5,
|
|
GST_JPEG_MARKER_SOF6 = 0xC6,
|
|
GST_JPEG_MARKER_SOF7 = 0xC7,
|
|
/* 0xC8 = reserved */
|
|
GST_JPEG_MARKER_SOF9 = 0xC9,
|
|
GST_JPEG_MARKER_SOF10 = 0xCA,
|
|
GST_JPEG_MARKER_SOF11 = 0xCB,
|
|
/* 0xCC = DAC see below */
|
|
GST_JPEG_MARKER_SOF13 = 0xCD,
|
|
GST_JPEG_MARKER_SOF14 = 0xCE,
|
|
GST_JPEG_MARKER_SOF15 = 0xCF,
|
|
GST_JPEG_MARKER_DHT = 0xC4,
|
|
GST_JPEG_MARKER_DAC = 0xCC,
|
|
GST_JPEG_MARKER_RST0 = 0xD0,
|
|
GST_JPEG_MARKER_RST1 = 0xD1,
|
|
GST_JPEG_MARKER_RST2 = 0xD2,
|
|
GST_JPEG_MARKER_RST3 = 0xD3,
|
|
GST_JPEG_MARKER_RST4 = 0xD4,
|
|
GST_JPEG_MARKER_RST5 = 0xD5,
|
|
GST_JPEG_MARKER_RST6 = 0xD6,
|
|
GST_JPEG_MARKER_RST7 = 0xD7,
|
|
GST_JPEG_MARKER_SOI = 0xD8,
|
|
GST_JPEG_MARKER_EOI = 0xD9,
|
|
GST_JPEG_MARKER_SOS = 0xDA,
|
|
GST_JPEG_MARKER_DQT = 0xDB,
|
|
GST_JPEG_MARKER_DNL = 0xDC,
|
|
GST_JPEG_MARKER_DRI = 0xDD,
|
|
GST_JPEG_MARKER_APP0 = 0xE0,
|
|
GST_JPEG_MARKER_APP1 = 0xE1,
|
|
GST_JPEG_MARKER_APP2 = 0xE2,
|
|
GST_JPEG_MARKER_APP3 = 0xE3,
|
|
GST_JPEG_MARKER_APP4 = 0xE4,
|
|
GST_JPEG_MARKER_APP5 = 0xE5,
|
|
GST_JPEG_MARKER_APP6 = 0xE6,
|
|
GST_JPEG_MARKER_APP7 = 0xE7,
|
|
GST_JPEG_MARKER_APP8 = 0xE8,
|
|
GST_JPEG_MARKER_APP9 = 0xE9,
|
|
GST_JPEG_MARKER_APP10 = 0xEA,
|
|
GST_JPEG_MARKER_APP11 = 0xEB,
|
|
GST_JPEG_MARKER_APP12 = 0xEC,
|
|
GST_JPEG_MARKER_APP13 = 0xED,
|
|
GST_JPEG_MARKER_APP14 = 0xEE,
|
|
GST_JPEG_MARKER_APP15 = 0xEF,
|
|
GST_JPEG_MARKER_COM = 0xFE,
|
|
} GstJpegMarker;
|
|
|
|
#define GST_JPEG_MARKER_SOF_MIN GST_JPEG_MARKER_SOF0
|
|
#define GST_JPEG_MARKER_SOF_MAX GST_JPEG_MARKER_SOF15
|
|
|
|
#define GST_JPEG_MARKER_APP_MIN GST_JPEG_MARKER_APP0
|
|
#define GST_JPEG_MARKER_APP_MAX GST_JPEG_MARKER_APP15
|
|
|
|
#define GST_JPEG_MARKER_RST_MIN GST_JPEG_MARKER_RST0
|
|
#define GST_JPEG_MARKER_RST_MAX GST_JPEG_MARKER_RST7
|
|
|
|
/**
|
|
* GstJpegProfile:
|
|
* @GST_JPEG_PROFILE_BASELINE: Baseline DCT
|
|
* @GST_JPEG_PROFILE_EXTENDED: Extended sequential DCT
|
|
* @GST_JPEG_PROFILE_PROGRESSIVE: Progressive DCT
|
|
* @GST_JPEG_PROFILE_LOSSLESS: Lossless (sequential)
|
|
*
|
|
* JPEG encoding processes.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
typedef enum {
|
|
GST_JPEG_PROFILE_BASELINE = 0x00,
|
|
GST_JPEG_PROFILE_EXTENDED = 0x01,
|
|
GST_JPEG_PROFILE_PROGRESSIVE = 0x02,
|
|
GST_JPEG_PROFILE_LOSSLESS = 0x03,
|
|
} GstJpegProfile;
|
|
|
|
/**
|
|
* GstJpegEntropyCodingMode:
|
|
* @GST_JPEG_ENTROPY_CODING_HUFFMAN: Huffman coding
|
|
* @GST_JPEG_ENTROPY_CODING_ARITHMETIC: arithmetic coding
|
|
*
|
|
* JPEG entropy coding mode.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
typedef enum {
|
|
GST_JPEG_ENTROPY_CODING_HUFFMAN = 0x00,
|
|
GST_JPEG_ENTROPY_CODING_ARITHMETIC = 0x08
|
|
} GstJpegEntropyCodingMode;
|
|
|
|
/**
|
|
* GstJpegQuantTable:
|
|
* @quant_precision: Quantization table element precision (Pq)
|
|
* @quant_table: Quantization table elements (Qk)
|
|
* @valid: If the quantization table is valid, which means it has
|
|
* already been parsed
|
|
*
|
|
* Quantization table.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
struct _GstJpegQuantTable
|
|
{
|
|
guint8 quant_precision;
|
|
guint16 quant_table[GST_JPEG_MAX_QUANT_ELEMENTS];
|
|
gboolean valid;
|
|
};
|
|
|
|
/**
|
|
* GstJpegQuantTables:
|
|
* @quant_tables: All quantization tables
|
|
*
|
|
* Helper data structure that holds all quantization tables used to
|
|
* decode an image.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
struct _GstJpegQuantTables
|
|
{
|
|
GstJpegQuantTable quant_tables[GST_JPEG_MAX_SCAN_COMPONENTS];
|
|
};
|
|
|
|
/**
|
|
* GstJpegHuffmanTable:
|
|
* @huf_bits: Number of Huffman codes of length i + 1 (Li)
|
|
* @huf_vales: Value associated with each Huffman code (Vij)
|
|
* @valid: If the Huffman table is valid, which means it has already
|
|
* been parsed
|
|
*
|
|
* Huffman table.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
struct _GstJpegHuffmanTable
|
|
{
|
|
guint8 huf_bits[16];
|
|
guint8 huf_values[256];
|
|
gboolean valid;
|
|
};
|
|
|
|
/**
|
|
* GstJpegHuffmanTables:
|
|
* @dc_tables: DC Huffman tables
|
|
* @ac_tables: AC Huffman tables
|
|
*
|
|
* Helper data structure that holds all AC/DC Huffman tables used to
|
|
* decode an image.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
struct _GstJpegHuffmanTables
|
|
{
|
|
GstJpegHuffmanTable dc_tables[GST_JPEG_MAX_SCAN_COMPONENTS];
|
|
GstJpegHuffmanTable ac_tables[GST_JPEG_MAX_SCAN_COMPONENTS];
|
|
};
|
|
|
|
/**
|
|
* GstJpegScanComponent:
|
|
* @component_selector: Scan component selector (Csj)
|
|
* @dc_selector: DC entropy coding table destination selector (Tdj)
|
|
* @ac_selector: AC entropy coding table destination selector (Taj)
|
|
|
|
* Component-specification parameters.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
struct _GstJpegScanComponent
|
|
{
|
|
guint8 component_selector; /* 0 .. 255 */
|
|
guint8 dc_selector; /* 0 .. 3 */
|
|
guint8 ac_selector; /* 0 .. 3 */
|
|
};
|
|
|
|
/**
|
|
* GstJpegScanHdr:
|
|
* @num_components: Number of image components in scan (Ns)
|
|
* @components: Image components
|
|
*
|
|
* Scan header.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
struct _GstJpegScanHdr
|
|
{
|
|
guint8 num_components; /* 1 .. 4 */
|
|
GstJpegScanComponent components[GST_JPEG_MAX_SCAN_COMPONENTS];
|
|
|
|
/*< private >*/
|
|
guint8 _reserved1; /* Ss */
|
|
guint8 _reserved2; /* Se */
|
|
guint8 _reserved3; /* Al */
|
|
guint8 _reserved4; /* Ah */
|
|
};
|
|
|
|
/**
|
|
* GstJpegFrameComponent:
|
|
* @identifier: Component identifier (Ci)
|
|
* @horizontal_factor: Horizontal sampling factor (Hi)
|
|
* @vertical_factor: Vertical sampling factor (Vi)
|
|
* @quant_table_selector: Quantization table destination selector (Tqi)
|
|
*
|
|
* Component-specification parameters.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
struct _GstJpegFrameComponent
|
|
{
|
|
guint8 identifier; /* 0 .. 255 */
|
|
guint8 horizontal_factor; /* 1 .. 4 */
|
|
guint8 vertical_factor; /* 1 .. 4 */
|
|
guint8 quant_table_selector; /* 0 .. 3 */
|
|
};
|
|
|
|
/**
|
|
* GstJpegFrameHdr:
|
|
* @sample_precision: Sample precision (P)
|
|
* @height: Number of lines (Y)
|
|
* @width: Number of samples per line (X)
|
|
* @num_components: Number of image components in frame (Nf)
|
|
* @components: Image components
|
|
* @restart_interval: Number of MCU in the restart interval (Ri)
|
|
*
|
|
* Frame header.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
struct _GstJpegFrameHdr
|
|
{
|
|
guint8 sample_precision; /* 2 .. 16 */
|
|
guint16 width; /* 1 .. 65535 */
|
|
guint16 height; /* 0 .. 65535 */
|
|
guint8 num_components; /* 1 .. 255 */
|
|
GstJpegFrameComponent components[GST_JPEG_MAX_FRAME_COMPONENTS];
|
|
};
|
|
|
|
/**
|
|
* GstJpegSegment:
|
|
* @marker: The type of the segment that starts at @offset
|
|
* @data: the data containing the jpeg segment starting at @offset
|
|
* @offset: The offset to the segment start in bytes. This is the
|
|
* exact start of the segment, no marker code included
|
|
* @size: The size of the segment in bytes, or -1 if the end was not
|
|
* found. It is the exact size of the segment, without the sync byte and
|
|
* marker code but including any length bytes.
|
|
*
|
|
* A structure that contains the type of a segment, its offset and its size.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
struct _GstJpegSegment
|
|
{
|
|
GstJpegMarker marker;
|
|
const guint8 *data;
|
|
guint offset;
|
|
gssize size;
|
|
};
|
|
|
|
gboolean gst_jpeg_parse (GstJpegSegment * seg,
|
|
const guint8 * data,
|
|
gsize size,
|
|
guint offset);
|
|
|
|
gboolean gst_jpeg_segment_parse_frame_header (const GstJpegSegment * segment,
|
|
GstJpegFrameHdr * frame_hdr);
|
|
|
|
gboolean gst_jpeg_segment_parse_scan_header (const GstJpegSegment * segment,
|
|
GstJpegScanHdr * scan_hdr);
|
|
|
|
gboolean gst_jpeg_segment_parse_huffman_table (const GstJpegSegment * segment,
|
|
GstJpegHuffmanTables * huff_tables);
|
|
|
|
gboolean gst_jpeg_segment_parse_restart_interval (const GstJpegSegment * segment,
|
|
guint * interval);
|
|
|
|
gboolean gst_jpeg_segment_parse_quantization_table (const GstJpegSegment * segment,
|
|
GstJpegQuantTables * quant_tables);
|
|
|
|
void gst_jpeg_get_default_quantization_tables (GstJpegQuantTables * quant_tables);
|
|
|
|
void gst_jpeg_get_default_huffman_tables (GstJpegHuffmanTables * huff_tables);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* GST_JPEG_PARSER_H */
|