third_party/libva/va/va_dec_jpeg.h

   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
  36 extern "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  */
  55 typedef 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  *
  87  * The #quantiser_table values are specified in zig-zag scan order.
  88  */
  89 typedef struct _VAIQMatrixBufferJPEGBaseline {
  90     /** \brief Specifies which #quantiser_table is valid. */
  91     unsigned char       load_quantiser_table[4];
  92     /** \brief Quanziation tables indexed by table identifier (Tqi). */
  93     unsigned char       quantiser_table[4][64];
  94 } VAIQMatrixBufferJPEGBaseline;
  95
  96 /**
  97  * \brief Slice parameter for JPEG decoding.
  98  *
  99  * This structure holds information from the scan header, along with
 100  * definitions from additional segments. The associated slice data
 101  * buffer holds all entropy coded segments (ECS) in the scan.
 102  */
 103 typedef struct _VASliceParameterBufferJPEGBaseline {
 104     /** @name Codec-independent Slice Parameter Buffer base. */
 105     /**@{*/
 106     /** \brief Number of bytes in the slice data buffer for this slice. */
 107     unsigned int        slice_data_size;
 108     /** \brief The offset to the first byte of the first MCU. */
 109     unsigned int        slice_data_offset;
 110     /** \brief Slice data buffer flags. See \c VA_SLICE_DATA_FLAG_xxx. */
 111     unsigned int        slice_data_flag;
 112     /**@}*/
 113
 114     /** \brief Scan horizontal position. */
 115     unsigned int        slice_horizontal_position;
 116     /** \brief Scan vertical position. */
 117     unsigned int        slice_vertical_position;
 118
 119     struct {
 120         /** \brief Scan component selector (Csj). */
 121         unsigned char   component_selector;
 122         /** \brief DC entropy coding table selector (Tdj). */
 123         unsigned char   dc_table_selector;
 124         /** \brief AC entropy coding table selector (Taj). */
 125         unsigned char   ac_table_selector;
 126     }                   components[4];
 127     /** \brief Number of components in scan (Ns). */
 128     unsigned char       num_components;
 129
 130     /** \brief Restart interval definition (Ri). */
 131     unsigned short      restart_interval;
 132     /** \brief Number of MCUs in a scan. */
 133     unsigned int        num_mcus;
 134 } VASliceParameterBufferJPEGBaseline;
 135
 136 /**@}*/
 137
 138 #ifdef __cplusplus
 139 }
 140 #endif
 141
 142 #endif /* VA_DEC_JPEG_H */