143 lines
4.9 KiB
C
143 lines
4.9 KiB
C
/*
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* Copyright (c) 2007-2012 Intel Corporation. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file va_dec_jpeg.h
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* \brief The JPEG decoding API
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*
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* This file contains the \ref api_dec_jpeg "JPEG decoding API".
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*/
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#ifndef VA_DEC_JPEG_H
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#define VA_DEC_JPEG_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <va/va.h>
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/**
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* \defgroup api_dec_jpeg JPEG decoding API
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*
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* This JPEG decoding API supports Baseline profile only.
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*
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* @{
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*/
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/**
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* \brief Picture parameter for JPEG decoding.
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*
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* This structure holds information from the frame header, along with
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* definitions from additional segments.
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*/
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typedef struct _VAPictureParameterBufferJPEGBaseline {
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/** \brief Picture width in pixels. */
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unsigned short picture_width;
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/** \brief Picture height in pixels. */
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unsigned short picture_height;
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struct {
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/** \brief Component identifier (Ci). */
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unsigned char component_id;
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/** \brief Horizontal sampling factor (Hi). */
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unsigned char h_sampling_factor;
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/** \brief Vertical sampling factor (Vi). */
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unsigned char v_sampling_factor;
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/* \brief Quantization table selector (Tqi). */
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unsigned char quantiser_table_selector;
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} components[255];
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/** \brief Number of components in frame (Nf). */
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unsigned char num_components;
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} VAPictureParameterBufferJPEGBaseline;
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/**
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* \brief Quantization table for JPEG decoding.
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*
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* This structure holds the complete quantization tables. This is an
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* aggregation of all quantization table (DQT) segments maintained by
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* the application. i.e. up to 4 quantization tables are stored in
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* there for baseline profile.
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*
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* The #load_quantization_table array can be used as a hint to notify
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* the VA driver implementation about which table(s) actually changed
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* since the last submission of this buffer.
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*
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* The #quantiser_table values are specified in zig-zag scan order.
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*/
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typedef struct _VAIQMatrixBufferJPEGBaseline {
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/** \brief Specifies which #quantiser_table is valid. */
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unsigned char load_quantiser_table[4];
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/** \brief Quanziation tables indexed by table identifier (Tqi). */
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unsigned char quantiser_table[4][64];
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} VAIQMatrixBufferJPEGBaseline;
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/**
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* \brief Slice parameter for JPEG decoding.
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*
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* This structure holds information from the scan header, along with
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* definitions from additional segments. The associated slice data
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* buffer holds all entropy coded segments (ECS) in the scan.
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*/
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typedef struct _VASliceParameterBufferJPEGBaseline {
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/** @name Codec-independent Slice Parameter Buffer base. */
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/**@{*/
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/** \brief Number of bytes in the slice data buffer for this slice. */
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unsigned int slice_data_size;
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/** \brief The offset to the first byte of the first MCU. */
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unsigned int slice_data_offset;
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/** \brief Slice data buffer flags. See \c VA_SLICE_DATA_FLAG_xxx. */
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unsigned int slice_data_flag;
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/**@}*/
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/** \brief Scan horizontal position. */
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unsigned int slice_horizontal_position;
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/** \brief Scan vertical position. */
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unsigned int slice_vertical_position;
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struct {
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/** \brief Scan component selector (Csj). */
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unsigned char component_selector;
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/** \brief DC entropy coding table selector (Tdj). */
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unsigned char dc_table_selector;
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/** \brief AC entropy coding table selector (Taj). */
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unsigned char ac_table_selector;
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} components[4];
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/** \brief Number of components in scan (Ns). */
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unsigned char num_components;
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/** \brief Restart interval definition (Ri). */
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unsigned short restart_interval;
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/** \brief Number of MCUs in a scan. */
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unsigned int num_mcus;
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} VASliceParameterBufferJPEGBaseline;
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/**@}*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* VA_DEC_JPEG_H */
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