1/*
2 * Copyright (c) 2007-2012 Intel Corporation. All Rights Reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the
13 * next paragraph) shall be included in all copies or substantial portions
14 * of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
19 * IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE LIABLE FOR
20 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
21 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
22 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25/**
26 * \file va_dec_jpeg.h
27 * \brief The JPEG decoding API
28 *
29 * This file contains the \ref api_dec_jpeg "JPEG decoding API".
30 */
31
32#ifndef VA_DEC_JPEG_H
33#define VA_DEC_JPEG_H
34
35#ifdef __cplusplus
36extern "C" {
37#endif
38
39#include <va/va.h>
40
41/**
42 * \defgroup api_dec_jpeg JPEG decoding API
43 *
44 * This JPEG decoding API supports Baseline profile only.
45 *
46 * @{
47 */
48
49/**
50 * \brief Picture parameter for JPEG decoding.
51 *
52 * This structure holds information from the frame header, along with
53 * definitions from additional segments.
54 */
55typedef struct _VAPictureParameterBufferJPEGBaseline {
56    /** \brief Picture width in pixels. */
57    unsigned short      picture_width;
58    /** \brief Picture height in pixels. */
59    unsigned short      picture_height;
60
61    struct {
62        /** \brief Component identifier (Ci). */
63        unsigned char   component_id;
64        /** \brief Horizontal sampling factor (Hi). */
65        unsigned char   h_sampling_factor;
66        /** \brief Vertical sampling factor (Vi). */
67        unsigned char   v_sampling_factor;
68        /* \brief Quantization table selector (Tqi). */
69        unsigned char   quantiser_table_selector;
70    }                   components[255];
71    /** \brief Number of components in frame (Nf). */
72    unsigned char       num_components;
73} VAPictureParameterBufferJPEGBaseline;
74
75/**
76 * \brief Quantization table for JPEG decoding.
77 *
78 * This structure holds the complete quantization tables. This is an
79 * aggregation of all quantization table (DQT) segments maintained by
80 * the application. i.e. up to 4 quantization tables are stored in
81 * there for baseline profile.
82 *
83 * The #load_quantization_table array can be used as a hint to notify
84 * the VA driver implementation about which table(s) actually changed
85 * since the last submission of this buffer.
86 */
87typedef struct _VAIQMatrixBufferJPEGBaseline {
88    /** \brief Specifies which #quantiser_table is valid. */
89    unsigned char       load_quantiser_table[4];
90    /** \brief Quanziation tables indexed by table identifier (Tqi). */
91    unsigned char       quantiser_table[4][64];
92} VAIQMatrixBufferJPEGBaseline;
93
94/**
95 * \brief Huffman table for JPEG decoding.
96 *
97 * This structure holds the complete Huffman tables. This is an
98 * aggregation of all Huffman table (DHT) segments maintained by the
99 * application. i.e. up to 2 Huffman tables are stored in there for
100 * baseline profile.
101 *
102 * The #load_huffman_table array can be used as a hint to notify the
103 * VA driver implementation about which table(s) actually changed
104 * since the last submission of this buffer.
105 */
106typedef struct _VAHuffmanTableBufferJPEGBaseline {
107    /** \brief Specifies which #huffman_table is valid. */
108    unsigned char       load_huffman_table[2];
109    /** \brief Huffman tables indexed by table identifier (Th). */
110    struct {
111        /** @name DC table (up to 12 categories) */
112        /**@{*/
113        /** \brief Number of Huffman codes of length i + 1 (Li). */
114        unsigned char   num_dc_codes[16];
115        /** \brief Value associated with each Huffman code (Vij). */
116        unsigned char   dc_values[12];
117        /**@}*/
118        /** @name AC table (2 special codes + up to 16 * 10 codes) */
119        /**@{*/
120        /** \brief Number of Huffman codes of length i + 1 (Li). */
121        unsigned char   num_ac_codes[16];
122        /** \brief Value associated with each Huffman code (Vij). */
123        unsigned char   ac_values[162];
124        /** \brief Padding to 4-byte boundaries. Must be set to zero. */
125        unsigned char   pad[2];
126        /**@}*/
127    }                   huffman_table[2];
128} VAHuffmanTableBufferJPEGBaseline;
129
130/**
131 * \brief Slice parameter for JPEG decoding.
132 *
133 * This structure holds information from the scan header, along with
134 * definitions from additional segments. The associated slice data
135 * buffer holds all entropy coded segments (ECS) in the scan.
136 */
137typedef struct _VASliceParameterBufferJPEGBaseline {
138    /** @name Codec-independent Slice Parameter Buffer base. */
139    /**@{*/
140    /** \brief Number of bytes in the slice data buffer for this slice. */
141    unsigned int        slice_data_size;
142    /** \brief The offset to the first byte of the first MCU. */
143    unsigned int        slice_data_offset;
144    /** \brief Slice data buffer flags. See \c VA_SLICE_DATA_FLAG_xxx. */
145    unsigned int        slice_data_flag;
146    /**@}*/
147
148    /** \brief Scan horizontal position. */
149    unsigned int        slice_horizontal_position;
150    /** \brief Scan vertical position. */
151    unsigned int        slice_vertical_position;
152
153    struct {
154        /** \brief Scan component selector (Csj). */
155        unsigned char   component_selector;
156        /** \brief DC entropy coding table selector (Tdj). */
157        unsigned char   dc_table_selector;
158        /** \brief AC entropy coding table selector (Taj). */
159        unsigned char   ac_table_selector;
160    }                   components[4];
161    /** \brief Number of components in scan (Ns). */
162    unsigned char       num_components;
163
164    /** \brief Restart interval definition (Ri). */
165    unsigned short      restart_interval;
166    /** \brief Number of MCUs in a scan. */
167    unsigned int        num_mcus;
168} VASliceParameterBufferJPEGBaseline;
169
170/**@}*/
171
172#ifdef __cplusplus
173}
174#endif
175
176#endif /* VA_DEC_JPEG_H */
177