/*
 * Copyright (c) 2007 Intel Corporation. All Rights Reserved.
 *
 * 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, sub license, 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 (including the
 * next paragraph) 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 NON-INFRINGEMENT.
 * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS 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.
 */

/*
 * Video Decode Acceleration -Backend API
 */

#ifndef _VA_BACKEND_H_
#define _VA_BACKEND_H_

#include <va/va.h>

typedef struct VADriverContext *VADriverContextP;
typedef struct VADisplayContext *VADisplayContextP;

/** \brief VA display types. */
enum {
    /** \brief Mask to major identifier for VA display type. */
    VA_DISPLAY_MAJOR_MASK = 0xf0,

    /** \brief VA/X11 API is used, through vaGetDisplay() entry-point. */
    VA_DISPLAY_X11      = 0x10,
    /** \brief VA/GLX API is used, through vaGetDisplayGLX() entry-point. */
    VA_DISPLAY_GLX      = (VA_DISPLAY_X11 | (1 << 0)),
    /** \brief VA/Android API is used, through vaGetDisplay() entry-point. */
    VA_DISPLAY_ANDROID  = 0x20,
    /** \brief VA/DRM API is used, through vaGetDisplayDRM() entry-point. */
    VA_DISPLAY_DRM      = 0x30,
    /** \brief VA/DRM API is used, with a render-node device path */
    VA_DISPLAY_DRM_RENDERNODES = (VA_DISPLAY_DRM | (1 << 0)),
    /** \brief VA/Wayland API is used, through vaGetDisplayWl() entry-point. */
    VA_DISPLAY_WAYLAND  = 0x40,
};

struct VADriverVTable {
    VAStatus(*vaTerminate)(VADriverContextP ctx);

    VAStatus(*vaQueryConfigProfiles)(
        VADriverContextP ctx,
        VAProfile *profile_list,    /* out */
        int *num_profiles           /* out */
    );

    VAStatus(*vaQueryConfigEntrypoints)(
        VADriverContextP ctx,
        VAProfile profile,
        VAEntrypoint  *entrypoint_list, /* out */
        int *num_entrypoints            /* out */
    );

    VAStatus(*vaGetConfigAttributes)(
        VADriverContextP ctx,
        VAProfile profile,
        VAEntrypoint entrypoint,
        VAConfigAttrib *attrib_list,    /* in/out */
        int num_attribs
    );

    VAStatus(*vaCreateConfig)(
        VADriverContextP ctx,
        VAProfile profile,
        VAEntrypoint entrypoint,
        VAConfigAttrib *attrib_list,
        int num_attribs,
        VAConfigID *config_id       /* out */
    );

    VAStatus(*vaDestroyConfig)(
        VADriverContextP ctx,
        VAConfigID config_id
    );

    VAStatus(*vaQueryConfigAttributes)(
        VADriverContextP ctx,
        VAConfigID config_id,
        VAProfile *profile,     /* out */
        VAEntrypoint *entrypoint,   /* out */
        VAConfigAttrib *attrib_list,    /* out */
        int *num_attribs        /* out */
    );

    VAStatus(*vaCreateSurfaces)(
        VADriverContextP ctx,
        int width,
        int height,
        int format,
        int num_surfaces,
        VASurfaceID *surfaces       /* out */
    );

    VAStatus(*vaDestroySurfaces)(
        VADriverContextP ctx,
        VASurfaceID *surface_list,
        int num_surfaces
    );

    VAStatus(*vaCreateContext)(
        VADriverContextP ctx,
        VAConfigID config_id,
        int picture_width,
        int picture_height,
        int flag,
        VASurfaceID *render_targets,
        int num_render_targets,
        VAContextID *context        /* out */
    );

    VAStatus(*vaDestroyContext)(
        VADriverContextP ctx,
        VAContextID context
    );

    VAStatus(*vaCreateBuffer)(
        VADriverContextP ctx,
        VAContextID context,        /* in */
        VABufferType type,      /* in */
        unsigned int size,      /* in */
        unsigned int num_elements,  /* in */
        void *data,         /* in */
        VABufferID *buf_id
    );

    VAStatus(*vaBufferSetNumElements)(
        VADriverContextP ctx,
        VABufferID buf_id,  /* in */
        unsigned int num_elements   /* in */
    );

    VAStatus(*vaMapBuffer)(
        VADriverContextP ctx,
        VABufferID buf_id,  /* in */
        void **pbuf         /* out */
    );

    VAStatus(*vaUnmapBuffer)(
        VADriverContextP ctx,
        VABufferID buf_id   /* in */
    );

    VAStatus(*vaDestroyBuffer)(
        VADriverContextP ctx,
        VABufferID buffer_id
    );

    VAStatus(*vaBeginPicture)(
        VADriverContextP ctx,
        VAContextID context,
        VASurfaceID render_target
    );

    VAStatus(*vaRenderPicture)(
        VADriverContextP ctx,
        VAContextID context,
        VABufferID *buffers,
        int num_buffers
    );

    VAStatus(*vaEndPicture)(
        VADriverContextP ctx,
        VAContextID context
    );

    VAStatus(*vaSyncSurface)(
        VADriverContextP ctx,
        VASurfaceID render_target
    );

    VAStatus(*vaQuerySurfaceStatus)(
        VADriverContextP ctx,
        VASurfaceID render_target,
        VASurfaceStatus *status /* out */
    );

    VAStatus(*vaQuerySurfaceError)(
        VADriverContextP ctx,
        VASurfaceID render_target,
        VAStatus error_status,
        void **error_info /*out*/
    );

    VAStatus(*vaPutSurface)(
        VADriverContextP ctx,
        VASurfaceID surface,
        void* draw, /* Drawable of window system */
        short srcx,
        short srcy,
        unsigned short srcw,
        unsigned short srch,
        short destx,
        short desty,
        unsigned short destw,
        unsigned short desth,
        VARectangle *cliprects, /* client supplied clip list */
        unsigned int number_cliprects, /* number of clip rects in the clip list */
        unsigned int flags /* de-interlacing flags */
    );

    VAStatus(*vaQueryImageFormats)(
        VADriverContextP ctx,
        VAImageFormat *format_list,        /* out */
        int *num_formats           /* out */
    );

    VAStatus(*vaCreateImage)(
        VADriverContextP ctx,
        VAImageFormat *format,
        int width,
        int height,
        VAImage *image     /* out */
    );

    VAStatus(*vaDeriveImage)(
        VADriverContextP ctx,
        VASurfaceID surface,
        VAImage *image     /* out */
    );

    VAStatus(*vaDestroyImage)(
        VADriverContextP ctx,
        VAImageID image
    );

    VAStatus(*vaSetImagePalette)(
        VADriverContextP ctx,
        VAImageID image,
        /*
             * pointer to an array holding the palette data.  The size of the array is
             * num_palette_entries * entry_bytes in size.  The order of the components
             * in the palette is described by the component_order in VAImage struct
             */
        unsigned char *palette
    );

    VAStatus(*vaGetImage)(
        VADriverContextP ctx,
        VASurfaceID surface,
        int x,     /* coordinates of the upper left source pixel */
        int y,
        unsigned int width, /* width and height of the region */
        unsigned int height,
        VAImageID image
    );

    VAStatus(*vaPutImage)(
        VADriverContextP ctx,
        VASurfaceID surface,
        VAImageID image,
        int src_x,
        int src_y,
        unsigned int src_width,
        unsigned int src_height,
        int dest_x,
        int dest_y,
        unsigned int dest_width,
        unsigned int dest_height
    );

    VAStatus(*vaQuerySubpictureFormats)(
        VADriverContextP ctx,
        VAImageFormat *format_list,        /* out */
        unsigned int *flags,       /* out */
        unsigned int *num_formats  /* out */
    );

    VAStatus(*vaCreateSubpicture)(
        VADriverContextP ctx,
        VAImageID image,
        VASubpictureID *subpicture   /* out */
    );

    VAStatus(*vaDestroySubpicture)(
        VADriverContextP ctx,
        VASubpictureID subpicture
    );

    VAStatus(*vaSetSubpictureImage)(
        VADriverContextP ctx,
        VASubpictureID subpicture,
        VAImageID image
    );

    VAStatus(*vaSetSubpictureChromakey)(
        VADriverContextP ctx,
        VASubpictureID subpicture,
        unsigned int chromakey_min,
        unsigned int chromakey_max,
        unsigned int chromakey_mask
    );

    VAStatus(*vaSetSubpictureGlobalAlpha)(
        VADriverContextP ctx,
        VASubpictureID subpicture,
        float global_alpha
    );

    VAStatus(*vaAssociateSubpicture)(
        VADriverContextP ctx,
        VASubpictureID subpicture,
        VASurfaceID *target_surfaces,
        int num_surfaces,
        short src_x, /* upper left offset in subpicture */
        short src_y,
        unsigned short src_width,
        unsigned short src_height,
        short dest_x, /* upper left offset in surface */
        short dest_y,
        unsigned short dest_width,
        unsigned short dest_height,
        /*
         * whether to enable chroma-keying or global-alpha
         * see VA_SUBPICTURE_XXX values
         */
        unsigned int flags
    );

    VAStatus(*vaDeassociateSubpicture)(
        VADriverContextP ctx,
        VASubpictureID subpicture,
        VASurfaceID *target_surfaces,
        int num_surfaces
    );

    VAStatus(*vaQueryDisplayAttributes)(
        VADriverContextP ctx,
        VADisplayAttribute *attr_list,  /* out */
        int *num_attributes     /* out */
    );

    VAStatus(*vaGetDisplayAttributes)(
        VADriverContextP ctx,
        VADisplayAttribute *attr_list,  /* in/out */
        int num_attributes
    );

    VAStatus(*vaSetDisplayAttributes)(
        VADriverContextP ctx,
        VADisplayAttribute *attr_list,
        int num_attributes
    );

    /* used by va trace */
    VAStatus(*vaBufferInfo)(
        VADriverContextP ctx,      /* in */
        VABufferID buf_id,         /* in */
        VABufferType *type,        /* out */
        unsigned int *size,        /* out */
        unsigned int *num_elements /* out */
    );

    /* lock/unlock surface for external access */
    VAStatus(*vaLockSurface)(
        VADriverContextP ctx,
        VASurfaceID surface,
        unsigned int *fourcc, /* out  for follow argument */
        unsigned int *luma_stride,
        unsigned int *chroma_u_stride,
        unsigned int *chroma_v_stride,
        unsigned int *luma_offset,
        unsigned int *chroma_u_offset,
        unsigned int *chroma_v_offset,
        unsigned int *buffer_name, /* if it is not NULL, assign the low lever
                                            * surface buffer name
                                            */
        void **buffer /* if it is not NULL, map the surface buffer for
                                * CPU access
                                */
    );

    VAStatus(*vaUnlockSurface)(
        VADriverContextP ctx,
        VASurfaceID surface
    );

    /* DEPRECATED */
    VAStatus
    (*vaGetSurfaceAttributes)(
        VADriverContextP    dpy,
        VAConfigID          config,
        VASurfaceAttrib    *attrib_list,
        unsigned int        num_attribs
    );

    VAStatus
    (*vaCreateSurfaces2)(
        VADriverContextP    ctx,
        unsigned int        format,
        unsigned int        width,
        unsigned int        height,
        VASurfaceID        *surfaces,
        unsigned int        num_surfaces,
        VASurfaceAttrib    *attrib_list,
        unsigned int        num_attribs
    );

    VAStatus
    (*vaQuerySurfaceAttributes)(
        VADriverContextP    dpy,
        VAConfigID          config,
        VASurfaceAttrib    *attrib_list,
        unsigned int       *num_attribs
    );

    VAStatus
    (*vaAcquireBufferHandle)(
        VADriverContextP    ctx,
        VABufferID          buf_id,         /* in */
        VABufferInfo *      buf_info        /* in/out */
    );

    VAStatus
    (*vaReleaseBufferHandle)(
        VADriverContextP    ctx,
        VABufferID          buf_id          /* in */
    );

    VAStatus(*vaCreateMFContext)(
        VADriverContextP ctx,
        VAMFContextID *mfe_context    /* out */
    );

    VAStatus(*vaMFAddContext)(
        VADriverContextP ctx,
        VAMFContextID mf_context,
        VAContextID context
    );

    VAStatus(*vaMFReleaseContext)(
        VADriverContextP ctx,
        VAMFContextID mf_context,
        VAContextID context
    );

    VAStatus(*vaMFSubmit)(
        VADriverContextP ctx,
        VAMFContextID mf_context,
        VAContextID *contexts,
        int num_contexts
    );
    VAStatus(*vaCreateBuffer2)(
        VADriverContextP ctx,
        VAContextID context,                /* in */
        VABufferType type,                  /* in */
        unsigned int width,                 /* in */
        unsigned int height,                /* in */
        unsigned int *unit_size,            /* out */
        unsigned int *pitch,                /* out */
        VABufferID *buf_id                  /* out */
    );

    VAStatus(*vaQueryProcessingRate)(
        VADriverContextP ctx,               /* in */
        VAConfigID config_id,               /* in */
        VAProcessingRateParameter *proc_buf,/* in */
        unsigned int *processing_rate   /* out */
    );

    VAStatus
    (*vaExportSurfaceHandle)(
        VADriverContextP    ctx,
        VASurfaceID         surface_id,     /* in */
        uint32_t            mem_type,       /* in */
        uint32_t            flags,          /* in */
        void               *descriptor      /* out */
    );
    VAStatus(*vaSyncSurface2)(
        VADriverContextP ctx,
        VASurfaceID surface,
        uint64_t timeout_ns
    );

    VAStatus(*vaSyncBuffer)(
        VADriverContextP ctx,
        VABufferID buf_id,
        uint64_t timeout_ns
    );

    VAStatus
    (*vaCopy)(
        VADriverContextP    ctx,            /* in */
        VACopyObject        *dst,           /* in */
        VACopyObject        *src,           /* in */
        VACopyOption        option          /* in */
    );
    /** \brief Reserved bytes for future use, must be zero */
    unsigned long reserved[54];
};

struct VADriverContext {
    void *pDriverData;

    /**
     * The core VA implementation hooks.
     *
     * This structure is allocated from libva with calloc().
     */
    struct VADriverVTable *vtable;

    /**
     * The VA/GLX implementation hooks.
     *
     * This structure is intended for drivers that implement the
     * VA/GLX API. The driver implementation is responsible for the
     * allocation and deallocation of this structure.
     */
    struct VADriverVTableGLX *vtable_glx;

    /**
     * The VA/EGL implementation hooks.
     *
     * This structure is intended for drivers that implement the
     * VA/EGL API. The driver implementation is responsible for the
     * allocation and deallocation of this structure.
     */
    struct VADriverVTableEGL *vtable_egl;

    /**
     * The third-party/private implementation hooks.
     *
     * This structure is intended for drivers that implement the
     * private API. The driver implementation is responsible for the
     * allocation and deallocation of this structure.
     */
    void *vtable_tpi;

    void *native_dpy;
    int x11_screen;
    int version_major;
    int version_minor;
    int max_profiles;
    int max_entrypoints;
    int max_attributes;
    int max_image_formats;
    int max_subpic_formats;
    int max_display_attributes;
    const char *str_vendor;

    void *handle;           /* dlopen handle */

    /**
     * \brief DRM state.
     *
     * This field holds driver specific data for DRM-based
     * drivers. This structure is allocated from libva with
     * calloc(). Do not deallocate from within VA driver
     * implementations.
     *
     * All structures shall be derived from struct drm_state. So, for
     * instance, this field holds a dri_state structure for VA/X11
     * drivers that use the DRM protocol.
     */
    void *drm_state;

    void *glx;              /* opaque for GLX code */

    /** \brief VA display type. */
    unsigned long display_type;

    /**
     * The VA/Wayland implementation hooks.
     *
     * This structure is intended for drivers that implement the
     * VA/Wayland API. libVA allocates this structure with calloc()
     * and owns the resulting memory.
     */
    struct VADriverVTableWayland *vtable_wayland;

    /**
     * \brief The VA/VPP implementation hooks.
     *
     * This structure is allocated from libva with calloc().
     */
    struct VADriverVTableVPP *vtable_vpp;

    char *override_driver_name;

    void *pDisplayContext;

    /**
     * Error callback.
     *
     * This is set by libva when the driver is opened, and will not be
     * changed thereafter.  The driver can call it with an error message,
     * which will be propagated to the API user through their error
     * callbacks, or sent to a default output if no callback is available.
     *
     * It is expected that end users will always be able to see these
     * messages, so it should be called only for serious errors.  For
     * example, hardware problems or fatal configuration errors.
     *
     * @param pDriverContext  Pointer to the driver context structure
     *                        being used by the current driver.
     * @param message  Message to send to the API user.  This must be a
     *                 null-terminated string.
     */
    void (*error_callback)(VADriverContextP pDriverContext,
                           const char *message);
    /**
     * Info callback.
     *
     * This has the same behaviour as the error callback, but has its
     * own set of callbacks to the API user.
     *
     * It should be used for informational messages which may be useful
     * for an application programmer or for debugging.  For example, minor
     * configuration errors, or information about the reason when another
     * API call generates an error return.  It is not expected that end
     * users will see these messages.
     *
     * @param pDriverContext  Pointer to the driver context structure
     *                        being used by the current driver.
     * @param message  Message to send to the API user.  This must be a
     *                 null-terminated string.
     */
    void (*info_callback)(VADriverContextP pDriverContext,
                          const char *message);

    /**
     * \brief The VA/Protected implementation hooks.
     *
     * This structure is allocated from libva with calloc().
     */
    struct VADriverVTableProt *vtable_prot;

    unsigned long reserved[37];         /* reserve for future add-ins, decrease the subscript accordingly */
};

#define VA_DISPLAY_MAGIC 0x56414430 /* VAD0 */
struct VADisplayContext {
    int vadpy_magic;

    VADisplayContextP pNext;
    VADriverContextP pDriverContext;

    int (*vaIsValid)(
        VADisplayContextP ctx
    );

    void (*vaDestroy)(
        VADisplayContextP ctx
    );

    VAStatus(*vaGetDriverName)(
        VADisplayContextP ctx,
        char **driver_name
    );

    void *opaque; /* opaque for display extensions (e.g. GLX) */
    void *vatrace; /* opaque for VA trace context */
    void *vafool; /* opaque for VA fool context */

    VAMessageCallback error_callback;
    void *error_callback_user_context;
    VAMessageCallback info_callback;
    void *info_callback_user_context;
    VAStatus(*vaGetNumCandidates)(
        VADisplayContextP ctx,
        int * num_candidates
    );

    VAStatus(*vaGetDriverNameByIndex)(
        VADisplayContextP ctx,
        char **driver_name,
        int  candidate_index
    );

    /** \brief Reserved bytes for future use, must be zero */
    unsigned long reserved[30];
};

typedef VAStatus(*VADriverInit)(
    VADriverContextP driver_context
);

#endif /* _VA_BACKEND_H_ */