mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-28 04:31:06 +00:00
7e7b4d68f4
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com> https://bugzilla.gnome.org/show_bug.cgi?id=673925
414 lines
14 KiB
C
414 lines
14 KiB
C
/*
|
|
* gstjpegparser.h - JPEG parser
|
|
*
|
|
* Copyright (C) 2011-2012 Intel Corporation
|
|
*
|
|
* 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).
|
|
*/
|
|
#define GST_JPEG_MAX_FRAME_COMPONENTS 256
|
|
|
|
/**
|
|
* GST_JPEG_MAX_SCAN_COMPONENTS:
|
|
*
|
|
* Maximum number of image components in a scan (Ns).
|
|
*/
|
|
#define GST_JPEG_MAX_SCAN_COMPONENTS 4
|
|
|
|
/**
|
|
* GST_JPEG_MAX_QUANT_ELEMENTS:
|
|
*
|
|
* Number of elements in the quantization table.
|
|
*/
|
|
#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 _GstJpegMarkerSegment GstJpegMarkerSegment;
|
|
|
|
/**
|
|
* GstJpegMarkerCode:
|
|
* @GST_JPEG_MARKER_SOF_MIN: Start of frame min marker code
|
|
* @GST_JPEG_MARKER_SOF_MAX: Start of frame max marker code
|
|
* @GST_JPEG_MARKER_DHT: Huffman tabler 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_APP_MIN: Application segment min marker code
|
|
* @GST_JPEG_MARKER_APP_MAX: Application segment max marker code
|
|
* @GST_JPEG_MARKER_COM: Comment marker code
|
|
*
|
|
* Indicates the type of JPEG segment.
|
|
*/
|
|
typedef enum {
|
|
GST_JPEG_MARKER_SOF_MIN = 0xC0,
|
|
GST_JPEG_MARKER_SOF_MAX = 0xCF,
|
|
GST_JPEG_MARKER_DHT = 0xC4,
|
|
GST_JPEG_MARKER_DAC = 0xCC,
|
|
GST_JPEG_MARKER_RST_MIN = 0xD0,
|
|
GST_JPEG_MARKER_RST_MAX = 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_APP_MIN = 0xE0,
|
|
GST_JPEG_MARKER_APP_MAX = 0xEF,
|
|
GST_JPEG_MARKER_COM = 0xFE,
|
|
} GstJpegMarkerCode;
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
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.
|
|
*/
|
|
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.
|
|
*/
|
|
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.
|
|
*/
|
|
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.
|
|
*/
|
|
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.
|
|
*/
|
|
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.
|
|
*/
|
|
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.
|
|
*/
|
|
struct _GstJpegScanHdr
|
|
{
|
|
guint8 num_components; /* 1 .. 4 */
|
|
GstJpegScanComponent components[GST_JPEG_MAX_SCAN_COMPONENTS];
|
|
};
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
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.
|
|
*/
|
|
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];
|
|
};
|
|
|
|
/**
|
|
* GstJpegMarkerSegment:
|
|
* @type: The type of the segment that starts 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 in bytes of the segment, or -1 if the end was not
|
|
* found. It is the exact size of the segment, no marker code included
|
|
*
|
|
* A structure that contains the type of a segment, its offset and its size.
|
|
*/
|
|
struct _GstJpegMarkerSegment
|
|
{
|
|
guint8 marker;
|
|
guint offset;
|
|
gint size;
|
|
};
|
|
|
|
/**
|
|
* gst_jpeg_scan_for_marker_code:
|
|
* @data: The data to parse
|
|
* @size: The size of @data
|
|
* @offset: The offset from which to start parsing
|
|
*
|
|
* Scans the JPEG bitstream contained in @data for the next marker
|
|
* code. If found, the function returns an offset to the marker code,
|
|
* including the 0xff prefix code but excluding any extra fill bytes.
|
|
*
|
|
* Returns: offset to the marker code if found, or -1 if not found.
|
|
*/
|
|
gint gst_jpeg_scan_for_marker_code (const guint8 * data,
|
|
gsize size,
|
|
guint offset);
|
|
|
|
/**
|
|
* gst_jpeg_parse:
|
|
* @data: The data to parse
|
|
* @size: The size of @data
|
|
* @offset: The offset from which to start parsing
|
|
*
|
|
* Parses the JPEG bitstream contained in @data, and returns the
|
|
* detected segment as a #GstJpegMarkerSegment.
|
|
*
|
|
* Returns: TRUE if a packet start code was found.
|
|
*/
|
|
gboolean gst_jpeg_parse (GstJpegMarkerSegment * seg,
|
|
const guint8 * data,
|
|
gsize size,
|
|
guint offset);
|
|
|
|
/**
|
|
* gst_jpeg_parse_frame_hdr:
|
|
* @hdr: (out): The #GstJpegFrameHdr structure to fill in
|
|
* @data: The data from which to parse the frame header
|
|
* @size: The size of @data
|
|
* @offset: The offset in bytes from which to start parsing @data
|
|
*
|
|
* Parses the @hdr JPEG frame header structure members from @data.
|
|
*
|
|
* Returns: TRUE if the frame header was correctly parsed.
|
|
*/
|
|
gboolean gst_jpeg_parse_frame_hdr (GstJpegFrameHdr * hdr,
|
|
const guint8 * data,
|
|
gsize size,
|
|
guint offset);
|
|
|
|
/**
|
|
* gst_jpeg_parse_scan_hdr:
|
|
* @hdr: (out): The #GstJpegScanHdr structure to fill in
|
|
* @data: The data from which to parse the scan header
|
|
* @size: The size of @data
|
|
* @offset: The offset in bytes from which to start parsing @data
|
|
*
|
|
* Parses the @hdr JPEG scan header structure members from @data.
|
|
*
|
|
* Returns: TRUE if the scan header was correctly parsed
|
|
*/
|
|
gboolean gst_jpeg_parse_scan_hdr (GstJpegScanHdr * hdr,
|
|
const guint8 * data,
|
|
gsize size,
|
|
guint offset);
|
|
|
|
/**
|
|
* gst_jpeg_parse_quantization_table:
|
|
* @quant_tables: (out): The #GstJpegQuantizationTable structure to fill in
|
|
* @num_quant_tables: The number of allocated quantization tables in @quant_tables
|
|
* @data: The data from which to parse the quantization table
|
|
* @size: The size of @data
|
|
* @offset: The offset in bytes from which to start parsing @data
|
|
*
|
|
* Parses the JPEG quantization table structure members from @data.
|
|
*
|
|
* Note: @quant_tables represents the complete set of possible
|
|
* quantization tables. However, the parser will only write to the
|
|
* quantization table specified by the table destination identifier
|
|
* (Tq). While doing so, the @valid flag of the specified quantization
|
|
* table will also be set to %TRUE.
|
|
*
|
|
* Returns: TRUE if the quantization table was correctly parsed.
|
|
*/
|
|
gboolean gst_jpeg_parse_quant_table (GstJpegQuantTables *quant_tables,
|
|
const guint8 * data,
|
|
gsize size,
|
|
guint offset);
|
|
|
|
/**
|
|
* gst_jpeg_parse_huffman_table:
|
|
* @huf_tables: (out): The #GstJpegHuffmanTable structure to fill in
|
|
* @data: The data from which to parse the Huffman table
|
|
* @size: The size of @data
|
|
* @offset: The offset in bytes from which to start parsing @data
|
|
*
|
|
* Parses the JPEG Huffman table structure members from @data.
|
|
*
|
|
* Note: @huf_tables represents the complete set of possible Huffman
|
|
* tables. However, the parser will only write to the Huffman table
|
|
* specified by the table destination identifier (Th). While doing so,
|
|
* the @valid flag of the specified Huffman table will also be set to
|
|
* %TRUE;
|
|
*
|
|
* Returns: TRUE if the Huffman table was correctly parsed.
|
|
*/
|
|
gboolean gst_jpeg_parse_huffman_table (GstJpegHuffmanTables *huf_tables,
|
|
const guint8 * data,
|
|
gsize size,
|
|
guint offset);
|
|
|
|
/**
|
|
* gst_jpeg_parse_restart_interval:
|
|
* @interval: (out): The parsed restart interval value
|
|
* @data: The data from which to parse the restart interval specification
|
|
* @size: The size of @data
|
|
* @offset: The offset in bytes from which to start parsing @data
|
|
*
|
|
* Returns: TRUE if the restart interval value was correctly parsed.
|
|
*/
|
|
gboolean gst_jpeg_parse_restart_interval (guint * interval,
|
|
const guint8 * data,
|
|
gsize size,
|
|
guint offset);
|
|
|
|
/**
|
|
* gst_jpeg_get_default_huffman_tables:
|
|
* @huf_tables: (out): The default DC/AC Huffman tables to fill in
|
|
*
|
|
* Fills in @huf_tables with the default AC/DC Huffman tables, as
|
|
* specified by the JPEG standard.
|
|
*/
|
|
void gst_jpeg_get_default_huffman_tables (GstJpegHuffmanTables *huf_tables);
|
|
|
|
/**
|
|
* gst_jpeg_get_default_quantization_table:
|
|
* @quant_tables: (out): The default luma/chroma quant-tables in zigzag mode
|
|
*
|
|
* Fills in @quant_tables with the default quantization tables, as
|
|
* specified by the JPEG standard.
|
|
*/
|
|
void gst_jpeg_get_default_quantization_tables (GstJpegQuantTables *quant_tables);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* GST_JPEG_PARSER_H */
|