/*
 * This copyright notice applies to this header file only:
 *
 * Copyright (c) 2010-2016 NVIDIA Corporation
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the software, and to permit persons to whom the
 * software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

/**
 * \file cuviddec.h
 * NvCuvid API provides Video Decoding interface to NVIDIA GPU devices.
 * \date 2015-2016
 * This file contains constants, structure definitions and function prototypes used for decoding.
 */

#if !defined(__CUDA_VIDEO_H__)
#define __CUDA_VIDEO_H__

#if defined(__x86_64) || defined(AMD64) || defined(_M_AMD64)
#if (CUDA_VERSION >= 3020) && (!defined(CUDA_FORCE_API_VERSION) || (CUDA_FORCE_API_VERSION >= 3020))
#define __CUVID_DEVPTR64
#endif
#endif

#if defined(__cplusplus)
extern "C" {
#endif /* __cplusplus */

typedef void *CUvideodecoder;
typedef struct _CUcontextlock_st *CUvideoctxlock;

/**
 * \addtogroup VIDEO_DECODER Video Decoder
 * @{
 */

/*!
 * \enum cudaVideoCodec
 * Video Codec Enums
 */
typedef enum cudaVideoCodec_enum {
    cudaVideoCodec_MPEG1=0,                 /**<  MPEG1   */
    cudaVideoCodec_MPEG2,                   /**<  MPEG2  */
    cudaVideoCodec_MPEG4,                   /**<  MPEG4   */
    cudaVideoCodec_VC1,                     /**<  VC1   */
    cudaVideoCodec_H264,                    /**<  H264   */
    cudaVideoCodec_JPEG,                    /**<  JPEG   */
    cudaVideoCodec_H264_SVC,                /**<  H264-SVC   */
    cudaVideoCodec_H264_MVC,                /**<  H264-MVC   */
    cudaVideoCodec_HEVC,                    /**<  HEVC   */
    cudaVideoCodec_VP8,                     /**<  VP8   */
    cudaVideoCodec_VP9,                     /**<  VP9   */
    cudaVideoCodec_NumCodecs,               /**<  Max COdecs   */
    // Uncompressed YUV
    cudaVideoCodec_YUV420 = (('I'<<24)|('Y'<<16)|('U'<<8)|('V')),   /**< Y,U,V (4:2:0)  */
    cudaVideoCodec_YV12   = (('Y'<<24)|('V'<<16)|('1'<<8)|('2')),   /**< Y,V,U (4:2:0)  */
    cudaVideoCodec_NV12   = (('N'<<24)|('V'<<16)|('1'<<8)|('2')),   /**< Y,UV  (4:2:0)  */
    cudaVideoCodec_YUYV   = (('Y'<<24)|('U'<<16)|('Y'<<8)|('V')),   /**< YUYV/YUY2 (4:2:2)  */
    cudaVideoCodec_UYVY   = (('U'<<24)|('Y'<<16)|('V'<<8)|('Y'))    /**< UYVY (4:2:2)  */
} cudaVideoCodec;

/*!
 * \enum cudaVideoSurfaceFormat
 * Video Surface Formats Enums
 */
typedef enum cudaVideoSurfaceFormat_enum {
    cudaVideoSurfaceFormat_NV12=0,      /**< NV12  */
    cudaVideoSurfaceFormat_P016=1       /**< P016  */
} cudaVideoSurfaceFormat;

/*!
 * \enum cudaVideoDeinterlaceMode
 * Deinterlacing Modes Enums
 */
typedef enum cudaVideoDeinterlaceMode_enum {
    cudaVideoDeinterlaceMode_Weave=0,   /**< Weave both fields (no deinterlacing) */
    cudaVideoDeinterlaceMode_Bob,       /**< Drop one field  */
    cudaVideoDeinterlaceMode_Adaptive   /**< Adaptive deinterlacing  */
} cudaVideoDeinterlaceMode;

/*!
 * \enum cudaVideoChromaFormat
 * Chroma Formats Enums
 */
typedef enum cudaVideoChromaFormat_enum {
    cudaVideoChromaFormat_Monochrome=0,  /**< MonoChrome */
    cudaVideoChromaFormat_420,           /**< 4:2:0 */
    cudaVideoChromaFormat_422,           /**< 4:2:2 */
    cudaVideoChromaFormat_444            /**< 4:4:4 */
} cudaVideoChromaFormat;

/*!
 * \enum cudaVideoCreateFlags
 * Decoder Flags Enums
 */
typedef enum cudaVideoCreateFlags_enum {
    cudaVideoCreate_Default = 0x00,     /**< Default operation mode: use dedicated video engines */
    cudaVideoCreate_PreferCUDA = 0x01,  /**< Use a CUDA-based decoder if faster than dedicated engines (requires a valid vidLock object for multi-threading) */
    cudaVideoCreate_PreferDXVA = 0x02,  /**< Go through DXVA internally if possible (requires D3D9 interop) */
    cudaVideoCreate_PreferCUVID = 0x04  /**< Use dedicated video engines directly */
} cudaVideoCreateFlags;

/*!
 * \struct CUVIDDECODECREATEINFO
 * Struct used in create decoder
 */
typedef struct _CUVIDDECODECREATEINFO
{
    unsigned long ulWidth;              /**< Coded Sequence Width */
    unsigned long ulHeight;             /**< Coded Sequence Height */
    unsigned long ulNumDecodeSurfaces;  /**< Maximum number of internal decode surfaces */
    cudaVideoCodec CodecType;           /**< cudaVideoCodec_XXX */
    cudaVideoChromaFormat ChromaFormat; /**< cudaVideoChromaFormat_XXX (only 4:2:0 is currently supported) */
    unsigned long ulCreationFlags;      /**< Decoder creation flags (cudaVideoCreateFlags_XXX) */
    unsigned long bitDepthMinus8;
    unsigned long Reserved1[4];         /**< Reserved for future use - set to zero */
    /**
    * area of the frame that should be displayed
    */
    struct {
        short left;
        short top;
        short right;
        short bottom;
    } display_area;

    cudaVideoSurfaceFormat OutputFormat;       /**< cudaVideoSurfaceFormat_XXX */
    cudaVideoDeinterlaceMode DeinterlaceMode;  /**< cudaVideoDeinterlaceMode_XXX */
    unsigned long ulTargetWidth;               /**< Post-processed Output Width (Should be aligned to 2) */
    unsigned long ulTargetHeight;              /**< Post-processed Output Height (Should be aligbed to 2) */
    unsigned long ulNumOutputSurfaces;         /**< Maximum number of output surfaces simultaneously mapped */
    CUvideoctxlock vidLock;                    /**< If non-NULL, context lock used for synchronizing ownership of the cuda context */
    /**
    * target rectangle in the output frame (for aspect ratio conversion)
    * if a null rectangle is specified, {0,0,ulTargetWidth,ulTargetHeight} will be used
    */
    struct {
        short left;
        short top;
        short right;
        short bottom;
    } target_rect;
    unsigned long Reserved2[5];                /**< Reserved for future use - set to zero */
} CUVIDDECODECREATEINFO;

/*!
 * \struct CUVIDH264DPBENTRY
 * H.264 DPB Entry
 */
typedef struct _CUVIDH264DPBENTRY
{
    int PicIdx;                 /**< picture index of reference frame */
    int FrameIdx;               /**< frame_num(short-term) or LongTermFrameIdx(long-term) */
    int is_long_term;           /**< 0=short term reference, 1=long term reference */
    int not_existing;           /**< non-existing reference frame (corresponding PicIdx should be set to -1) */
    int used_for_reference;     /**< 0=unused, 1=top_field, 2=bottom_field, 3=both_fields */
    int FieldOrderCnt[2];       /**< field order count of top and bottom fields */
} CUVIDH264DPBENTRY;

/*!
 * \struct CUVIDH264MVCEXT
 * H.264 MVC Picture Parameters Ext
 */
typedef struct _CUVIDH264MVCEXT
{
    int num_views_minus1;
    int view_id;
    unsigned char inter_view_flag;
    unsigned char num_inter_view_refs_l0;
    unsigned char num_inter_view_refs_l1;
    unsigned char MVCReserved8Bits;
    int InterViewRefsL0[16];
    int InterViewRefsL1[16];
} CUVIDH264MVCEXT;

/*!
 * \struct CUVIDH264SVCEXT
 * H.264 SVC Picture Parameters Ext
 */
typedef struct _CUVIDH264SVCEXT
{
    unsigned char profile_idc;
    unsigned char level_idc;
    unsigned char DQId;
    unsigned char DQIdMax;
    unsigned char disable_inter_layer_deblocking_filter_idc;
    unsigned char ref_layer_chroma_phase_y_plus1;
    signed char   inter_layer_slice_alpha_c0_offset_div2;
    signed char   inter_layer_slice_beta_offset_div2;

    unsigned short DPBEntryValidFlag;
    unsigned char inter_layer_deblocking_filter_control_present_flag;
    unsigned char extended_spatial_scalability_idc;
    unsigned char adaptive_tcoeff_level_prediction_flag;
    unsigned char slice_header_restriction_flag;
    unsigned char chroma_phase_x_plus1_flag;
    unsigned char chroma_phase_y_plus1;

    unsigned char tcoeff_level_prediction_flag;
    unsigned char constrained_intra_resampling_flag;
    unsigned char ref_layer_chroma_phase_x_plus1_flag;
    unsigned char store_ref_base_pic_flag;
    unsigned char Reserved8BitsA;
    unsigned char Reserved8BitsB;
    // For the 4 scaled_ref_layer_XX fields below,
    // if (extended_spatial_scalability_idc == 1), SPS field, G.7.3.2.1.4, add prefix "seq_"
    // if (extended_spatial_scalability_idc == 2), SLH field, G.7.3.3.4,
    short scaled_ref_layer_left_offset;
    short scaled_ref_layer_top_offset;
    short scaled_ref_layer_right_offset;
    short scaled_ref_layer_bottom_offset;
    unsigned short Reserved16Bits;
    struct _CUVIDPICPARAMS *pNextLayer; /**< Points to the picparams for the next layer to be decoded. Linked list ends at the target layer. */
    int bRefBaseLayer;                  /**< whether to store ref base pic */
} CUVIDH264SVCEXT;

/*!
 * \struct CUVIDH264PICPARAMS
 * H.264 Picture Parameters
 */
typedef struct _CUVIDH264PICPARAMS
{
    // SPS
    int log2_max_frame_num_minus4;
    int pic_order_cnt_type;
    int log2_max_pic_order_cnt_lsb_minus4;
    int delta_pic_order_always_zero_flag;
    int frame_mbs_only_flag;
    int direct_8x8_inference_flag;
    int num_ref_frames;             // NOTE: shall meet level 4.1 restrictions
    unsigned char residual_colour_transform_flag;
    unsigned char bit_depth_luma_minus8;    // Must be 0 (only 8-bit supported)
    unsigned char bit_depth_chroma_minus8;  // Must be 0 (only 8-bit supported)
    unsigned char qpprime_y_zero_transform_bypass_flag;
    // PPS
    int entropy_coding_mode_flag;
    int pic_order_present_flag;
    int num_ref_idx_l0_active_minus1;
    int num_ref_idx_l1_active_minus1;
    int weighted_pred_flag;
    int weighted_bipred_idc;
    int pic_init_qp_minus26;
    int deblocking_filter_control_present_flag;
    int redundant_pic_cnt_present_flag;
    int transform_8x8_mode_flag;
    int MbaffFrameFlag;
    int constrained_intra_pred_flag;
    int chroma_qp_index_offset;
    int second_chroma_qp_index_offset;
    int ref_pic_flag;
    int frame_num;
    int CurrFieldOrderCnt[2];
    // DPB
    CUVIDH264DPBENTRY dpb[16];          // List of reference frames within the DPB
    // Quantization Matrices (raster-order)
    unsigned char WeightScale4x4[6][16];
    unsigned char WeightScale8x8[2][64];
    // FMO/ASO
    unsigned char fmo_aso_enable;
    unsigned char num_slice_groups_minus1;
    unsigned char slice_group_map_type;
    signed char pic_init_qs_minus26;
    unsigned int slice_group_change_rate_minus1;
    union
    {
        unsigned long long slice_group_map_addr;
        const unsigned char *pMb2SliceGroupMap;
    } fmo;
    unsigned int  Reserved[12];
    // SVC/MVC
    union
    {
        CUVIDH264MVCEXT mvcext;
        CUVIDH264SVCEXT svcext;
    } svcmvc;
} CUVIDH264PICPARAMS;


/*!
 * \struct CUVIDMPEG2PICPARAMS
 * MPEG-2 Picture Parameters
 */
typedef struct _CUVIDMPEG2PICPARAMS
{
    int ForwardRefIdx;          // Picture index of forward reference (P/B-frames)
    int BackwardRefIdx;         // Picture index of backward reference (B-frames)
    int picture_coding_type;
    int full_pel_forward_vector;
    int full_pel_backward_vector;
    int f_code[2][2];
    int intra_dc_precision;
    int frame_pred_frame_dct;
    int concealment_motion_vectors;
    int q_scale_type;
    int intra_vlc_format;
    int alternate_scan;
    int top_field_first;
    // Quantization matrices (raster order)
    unsigned char QuantMatrixIntra[64];
    unsigned char QuantMatrixInter[64];
} CUVIDMPEG2PICPARAMS;

////////////////////////////////////////////////////////////////////////////////////////////////
//
// MPEG-4 Picture Parameters
//

// MPEG-4 has VOP types instead of Picture types
#define I_VOP 0
#define P_VOP 1
#define B_VOP 2
#define S_VOP 3

/*!
 * \struct CUVIDMPEG4PICPARAMS
 * MPEG-4 Picture Parameters
 */
typedef struct _CUVIDMPEG4PICPARAMS
{
    int ForwardRefIdx;          // Picture index of forward reference (P/B-frames)
    int BackwardRefIdx;         // Picture index of backward reference (B-frames)
    // VOL
    int video_object_layer_width;
    int video_object_layer_height;
    int vop_time_increment_bitcount;
    int top_field_first;
    int resync_marker_disable;
    int quant_type;
    int quarter_sample;
    int short_video_header;
    int divx_flags;
    // VOP
    int vop_coding_type;
    int vop_coded;
    int vop_rounding_type;
    int alternate_vertical_scan_flag;
    int interlaced;
    int vop_fcode_forward;
    int vop_fcode_backward;
    int trd[2];
    int trb[2];
    // Quantization matrices (raster order)
    unsigned char QuantMatrixIntra[64];
    unsigned char QuantMatrixInter[64];
    int gmc_enabled;
} CUVIDMPEG4PICPARAMS;

/*!
 * \struct CUVIDVC1PICPARAMS
 * VC1 Picture Parameters
 */
typedef struct _CUVIDVC1PICPARAMS
{
    int ForwardRefIdx;      /**< Picture index of forward reference (P/B-frames) */
    int BackwardRefIdx;     /**< Picture index of backward reference (B-frames) */
    int FrameWidth;         /**< Actual frame width */
    int FrameHeight;        /**< Actual frame height */
    // PICTURE
    int intra_pic_flag;     /**< Set to 1 for I,BI frames */
    int ref_pic_flag;       /**< Set to 1 for I,P frames */
    int progressive_fcm;    /**< Progressive frame */
    // SEQUENCE
    int profile;
    int postprocflag;
    int pulldown;
    int interlace;
    int tfcntrflag;
    int finterpflag;
    int psf;
    int multires;
    int syncmarker;
    int rangered;
    int maxbframes;
    // ENTRYPOINT
    int panscan_flag;
    int refdist_flag;
    int extended_mv;
    int dquant;
    int vstransform;
    int loopfilter;
    int fastuvmc;
    int overlap;
    int quantizer;
    int extended_dmv;
    int range_mapy_flag;
    int range_mapy;
    int range_mapuv_flag;
    int range_mapuv;
    int rangeredfrm;    // range reduction state
} CUVIDVC1PICPARAMS;

/*!
 * \struct CUVIDJPEGPICPARAMS
 * JPEG Picture Parameters
 */
typedef struct _CUVIDJPEGPICPARAMS
{
    int Reserved;
} CUVIDJPEGPICPARAMS;


 /*!
 * \struct CUVIDHEVCPICPARAMS
 * HEVC Picture Parameters
 */
typedef struct _CUVIDHEVCPICPARAMS
{
    // sps
    int pic_width_in_luma_samples;
    int pic_height_in_luma_samples;
    unsigned char log2_min_luma_coding_block_size_minus3;
    unsigned char log2_diff_max_min_luma_coding_block_size;
    unsigned char log2_min_transform_block_size_minus2;
    unsigned char log2_diff_max_min_transform_block_size;
    unsigned char pcm_enabled_flag;
    unsigned char log2_min_pcm_luma_coding_block_size_minus3;
    unsigned char log2_diff_max_min_pcm_luma_coding_block_size;
    unsigned char pcm_sample_bit_depth_luma_minus1;

    unsigned char pcm_sample_bit_depth_chroma_minus1;
    unsigned char pcm_loop_filter_disabled_flag;
    unsigned char strong_intra_smoothing_enabled_flag;
    unsigned char max_transform_hierarchy_depth_intra;
    unsigned char max_transform_hierarchy_depth_inter;
    unsigned char amp_enabled_flag;
    unsigned char separate_colour_plane_flag;
    unsigned char log2_max_pic_order_cnt_lsb_minus4;

    unsigned char num_short_term_ref_pic_sets;
    unsigned char long_term_ref_pics_present_flag;
    unsigned char num_long_term_ref_pics_sps;
    unsigned char sps_temporal_mvp_enabled_flag;
    unsigned char sample_adaptive_offset_enabled_flag;
    unsigned char scaling_list_enable_flag;
    unsigned char IrapPicFlag;
    unsigned char IdrPicFlag;

    unsigned char bit_depth_luma_minus8;
    unsigned char bit_depth_chroma_minus8;
    unsigned char reserved1[14];

    // pps
    unsigned char dependent_slice_segments_enabled_flag;
    unsigned char slice_segment_header_extension_present_flag;
    unsigned char sign_data_hiding_enabled_flag;
    unsigned char cu_qp_delta_enabled_flag;
    unsigned char diff_cu_qp_delta_depth;
    signed char init_qp_minus26;
    signed char pps_cb_qp_offset;
    signed char pps_cr_qp_offset;

    unsigned char constrained_intra_pred_flag;
    unsigned char weighted_pred_flag;
    unsigned char weighted_bipred_flag;
    unsigned char transform_skip_enabled_flag;
    unsigned char transquant_bypass_enabled_flag;
    unsigned char entropy_coding_sync_enabled_flag;
    unsigned char log2_parallel_merge_level_minus2;
    unsigned char num_extra_slice_header_bits;

    unsigned char loop_filter_across_tiles_enabled_flag;
    unsigned char loop_filter_across_slices_enabled_flag;
    unsigned char output_flag_present_flag;
    unsigned char num_ref_idx_l0_default_active_minus1;
    unsigned char num_ref_idx_l1_default_active_minus1;
    unsigned char lists_modification_present_flag;
    unsigned char cabac_init_present_flag;
    unsigned char pps_slice_chroma_qp_offsets_present_flag;

    unsigned char deblocking_filter_override_enabled_flag;
    unsigned char pps_deblocking_filter_disabled_flag;
    signed char pps_beta_offset_div2;
    signed char pps_tc_offset_div2;
    unsigned char tiles_enabled_flag;
    unsigned char uniform_spacing_flag;
    unsigned char num_tile_columns_minus1;
    unsigned char num_tile_rows_minus1;

    unsigned short column_width_minus1[21];
    unsigned short row_height_minus1[21];
    unsigned int reserved3[15];

    // RefPicSets
    int NumBitsForShortTermRPSInSlice;
    int NumDeltaPocsOfRefRpsIdx;
    int NumPocTotalCurr;
    int NumPocStCurrBefore;
    int NumPocStCurrAfter;
    int NumPocLtCurr;
    int CurrPicOrderCntVal;
    int RefPicIdx[16];                  // [refpic] Indices of valid reference pictures (-1 if unused for reference)
    int PicOrderCntVal[16];             // [refpic]
    unsigned char IsLongTerm[16];       // [refpic] 0=not a long-term reference, 1=long-term reference
    unsigned char RefPicSetStCurrBefore[8]; // [0..NumPocStCurrBefore-1] -> refpic (0..15)
    unsigned char RefPicSetStCurrAfter[8];  // [0..NumPocStCurrAfter-1] -> refpic (0..15)
    unsigned char RefPicSetLtCurr[8];       // [0..NumPocLtCurr-1] -> refpic (0..15)
    unsigned char RefPicSetInterLayer0[8];
    unsigned char RefPicSetInterLayer1[8];
    unsigned int reserved4[12];

    // scaling lists (diag order)
    unsigned char ScalingList4x4[6][16];       // [matrixId][i]
    unsigned char ScalingList8x8[6][64];       // [matrixId][i]
    unsigned char ScalingList16x16[6][64];     // [matrixId][i]
    unsigned char ScalingList32x32[2][64];     // [matrixId][i]
    unsigned char ScalingListDCCoeff16x16[6];  // [matrixId]
    unsigned char ScalingListDCCoeff32x32[2];  // [matrixId]
} CUVIDHEVCPICPARAMS;


/*!
 * \struct CUVIDVP8PICPARAMS
 * VP8 Picture Parameters
 */
typedef struct _CUVIDVP8PICPARAMS
{
    int width;
    int height;
    unsigned int first_partition_size;
    //Frame Indexes
    unsigned char LastRefIdx;
    unsigned char GoldenRefIdx;
    unsigned char AltRefIdx;
    union {
        struct {
            unsigned char frame_type : 1;    /**< 0 = KEYFRAME, 1 = INTERFRAME  */
            unsigned char version : 3;
            unsigned char show_frame : 1;
            unsigned char update_mb_segmentation_data : 1;    /**< Must be 0 if segmentation is not enabled */
            unsigned char Reserved2Bits : 2;
        };
        unsigned char wFrameTagFlags;
    } tagflags;
    unsigned char Reserved1[4];
    unsigned int  Reserved2[3];
} CUVIDVP8PICPARAMS;

/*!
 * \struct CUVIDVP9PICPARAMS
 * VP9 Picture Parameters
 */
typedef struct _CUVIDVP9PICPARAMS
{
    unsigned int width;
    unsigned int height;

    //Frame Indices
    unsigned char LastRefIdx;
    unsigned char GoldenRefIdx;
    unsigned char AltRefIdx;
    unsigned char colorSpace;

    unsigned short profile : 3;
    unsigned short frameContextIdx : 2;
    unsigned short frameType : 1;
    unsigned short showFrame : 1;
    unsigned short errorResilient : 1;
    unsigned short frameParallelDecoding : 1;
    unsigned short subSamplingX : 1;
    unsigned short subSamplingY : 1;
    unsigned short intraOnly : 1;
    unsigned short allow_high_precision_mv : 1;
    unsigned short refreshEntropyProbs : 1;
    unsigned short reserved2Bits : 2;

    unsigned short reserved16Bits;

    unsigned char  refFrameSignBias[4];

    unsigned char bitDepthMinus8Luma;
    unsigned char bitDepthMinus8Chroma;
    unsigned char loopFilterLevel;
    unsigned char loopFilterSharpness;

    unsigned char modeRefLfEnabled;
    unsigned char log2_tile_columns;
    unsigned char log2_tile_rows;

    unsigned char segmentEnabled : 1;
    unsigned char segmentMapUpdate : 1;
    unsigned char segmentMapTemporalUpdate : 1;
    unsigned char segmentFeatureMode : 1;
    unsigned char reserved4Bits : 4;


    unsigned char segmentFeatureEnable[8][4];
    short segmentFeatureData[8][4];
    unsigned char mb_segment_tree_probs[7];
    unsigned char segment_pred_probs[3];
    unsigned char reservedSegment16Bits[2];

    int qpYAc;
    int qpYDc;
    int qpChDc;
    int qpChAc;

    unsigned int activeRefIdx[3];
    unsigned int resetFrameContext;
    unsigned int mcomp_filter_type;
    unsigned int mbRefLfDelta[4];
    unsigned int mbModeLfDelta[2];
    unsigned int frameTagSize;
    unsigned int offsetToDctParts;
    unsigned int reserved128Bits[4];

} CUVIDVP9PICPARAMS;


/*!
 * \struct CUVIDPICPARAMS
 * Picture Parameters for Decoding
 */
typedef struct _CUVIDPICPARAMS
{
    int PicWidthInMbs;                    /**< Coded Frame Size */
    int FrameHeightInMbs;                 /**< Coded Frame Height */
    int CurrPicIdx;                       /**< Output index of the current picture */
    int field_pic_flag;                   /**< 0=frame picture, 1=field picture */
    int bottom_field_flag;                /**< 0=top field, 1=bottom field (ignored if field_pic_flag=0) */
    int second_field;                     /**< Second field of a complementary field pair */
    // Bitstream data
    unsigned int nBitstreamDataLen;        /**< Number of bytes in bitstream data buffer */
    const unsigned char *pBitstreamData;   /**< Ptr to bitstream data for this picture (slice-layer) */
    unsigned int nNumSlices;               /**< Number of slices in this picture */
    const unsigned int *pSliceDataOffsets; /**< nNumSlices entries, contains offset of each slice within the bitstream data buffer */
    int ref_pic_flag;                      /**< This picture is a reference picture */
    int intra_pic_flag;                    /**< This picture is entirely intra coded */
    unsigned int Reserved[30];             /**< Reserved for future use */
    // Codec-specific data
    union {
        CUVIDMPEG2PICPARAMS mpeg2;         /**< Also used for MPEG-1 */
        CUVIDH264PICPARAMS h264;
        CUVIDVC1PICPARAMS vc1;
        CUVIDMPEG4PICPARAMS mpeg4;
        CUVIDJPEGPICPARAMS jpeg;
        CUVIDHEVCPICPARAMS hevc;
        CUVIDVP8PICPARAMS vp8;
        CUVIDVP9PICPARAMS vp9;
        unsigned int CodecReserved[1024];
    } CodecSpecific;
} CUVIDPICPARAMS;


/*!
 * \struct CUVIDPROCPARAMS
 * Picture Parameters for Postprocessing
 */
typedef struct _CUVIDPROCPARAMS
{
    int progressive_frame;  /**< Input is progressive (deinterlace_mode will be ignored)  */
    int second_field;       /**< Output the second field (ignored if deinterlace mode is Weave) */
    int top_field_first;    /**< Input frame is top field first (1st field is top, 2nd field is bottom) */
    int unpaired_field;     /**< Input only contains one field (2nd field is invalid) */
    // The fields below are used for raw YUV input
    unsigned int reserved_flags;        /**< Reserved for future use (set to zero) */
    unsigned int reserved_zero;         /**< Reserved (set to zero) */
    unsigned long long raw_input_dptr;  /**< Input CUdeviceptr for raw YUV extensions */
    unsigned int raw_input_pitch;       /**< pitch in bytes of raw YUV input (should be aligned appropriately) */
    unsigned int raw_input_format;      /**< Reserved for future use (set to zero) */
    unsigned long long raw_output_dptr; /**< Reserved for future use (set to zero) */
    unsigned int raw_output_pitch;      /**< Reserved for future use (set to zero) */
    unsigned int Reserved[48];
    void *Reserved3[3];
} CUVIDPROCPARAMS;


/**
 *
 * In order to minimize decode latencies, there should be always at least 2 pictures in the decode
 * queue at any time, in order to make sure that all decode engines are always busy.
 *
 * Overall data flow:
 *  - cuvidCreateDecoder(...)
 *  For each picture:
 *  - cuvidDecodePicture(N)
 *  - cuvidMapVideoFrame(N-4)
 *  - do some processing in cuda
 *  - cuvidUnmapVideoFrame(N-4)
 *  - cuvidDecodePicture(N+1)
 *  - cuvidMapVideoFrame(N-3)
 *    ...
 *  - cuvidDestroyDecoder(...)
 *
 * NOTE:
 * - When the cuda context is created from a D3D device, the D3D device must also be created
 *   with the D3DCREATE_MULTITHREADED flag.
 * - There is a limit to how many pictures can be mapped simultaneously (ulNumOutputSurfaces)
 * - cuVidDecodePicture may block the calling thread if there are too many pictures pending
 *   in the decode queue
 */

/**
 *
 * Context-locking: to facilitate multi-threaded implementations, the following 4 functions
 * provide a simple mutex-style host synchronization. If a non-NULL context is specified
 * in CUVIDDECODECREATEINFO, the codec library will acquire the mutex associated with the given
 * context before making any cuda calls.
 * A multi-threaded application could create a lock associated with a context handle so that
 * multiple threads can safely share the same cuda context:
 *  - use cuCtxPopCurrent immediately after context creation in order to create a 'floating' context
 *    that can be passed to cuvidCtxLockCreate.
 *  - When using a floating context, all cuda calls should only be made within a cuvidCtxLock/cuvidCtxUnlock section.
 *
 * NOTE: This is a safer alternative to cuCtxPushCurrent and cuCtxPopCurrent, and is not related to video
 * decoder in any way (implemented as a critical section associated with cuCtx{Push|Pop}Current calls).
*/
/** @} */  /* End VIDEO_DECODER */

#if defined(__cplusplus)
}
#endif /* __cplusplus */

#endif // __CUDA_VIDEO_H__
