Update libva headers to the latest release (1.2.1).

third_party/libva/va/va_vpp.h

+/*
+ * Copyright (c) 2007-2011 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 INTEL 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.
+ */
+
+/**
+ * \file va_vpp.h
+ * \brief The video processing API
+ *
+ * This file contains the \ref api_vpp "Video processing API".
+ */
+
+#ifndef VA_VPP_H
+#define VA_VPP_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \defgroup api_vpp Video processing API
+ *
+ * @{
+ *
+ * The video processing API uses the same paradigm as for decoding:
+ * - Query for supported filters;
+ * - Set up a video processing pipeline;
+ * - Send video processing parameters through VA buffers.
+ *
+ * \section api_vpp_caps Query for supported filters
+ *
+ * Checking whether video processing is supported can be performed
+ * with vaQueryConfigEntrypoints() and the profile argument set to
+ * #VAProfileNone. If video processing is supported, then the list of
+ * returned entry-points will include #VAEntrypointVideoProc.
+ *
+ * \code
+ * VAEntrypoint *entrypoints;
+ * int i, num_entrypoints, supportsVideoProcessing = 0;
+ *
+ * num_entrypoints = vaMaxNumEntrypoints();
+ * entrypoints = malloc(num_entrypoints * sizeof(entrypoints[0]);
+ * vaQueryConfigEntrypoints(va_dpy, VAProfileNone,
+ *     entrypoints, &num_entrypoints);
+ *
+ * for (i = 0; !supportsVideoProcessing && i < num_entrypoints; i++) {
+ *     if (entrypoints[i] == VAEntrypointVideoProc)
+ *         supportsVideoProcessing = 1;
+ * }
+ * \endcode
+ *
+ * Then, the vaQueryVideoProcFilters() function is used to query the
+ * list of video processing filters.
+ *
+ * \code
+ * VAProcFilterType filters[VAProcFilterCount];
+ * unsigned int num_filters = VAProcFilterCount;
+ *
+ * // num_filters shall be initialized to the length of the array
+ * vaQueryVideoProcFilters(va_dpy, vpp_ctx, &filters, &num_filters);
+ * \endcode
+ *
+ * Finally, individual filter capabilities can be checked with
+ * vaQueryVideoProcFilterCaps().
+ *
+ * \code
+ * VAProcFilterCap denoise_caps;
+ * unsigned int num_denoise_caps = 1;
+ * vaQueryVideoProcFilterCaps(va_dpy, vpp_ctx,
+ *     VAProcFilterNoiseReduction,
+ *     &denoise_caps, &num_denoise_caps
+ * );
+ *
+ * VAProcFilterCapDeinterlacing deinterlacing_caps[VAProcDeinterlacingCount];
+ * unsigned int num_deinterlacing_caps = VAProcDeinterlacingCount;
+ * vaQueryVideoProcFilterCaps(va_dpy, vpp_ctx,
+ *     VAProcFilterDeinterlacing,
+ *     &deinterlacing_caps, &num_deinterlacing_caps
+ * );
+ * \endcode
+ *
+ * \section api_vpp_setup Set up a video processing pipeline
+ *
+ * A video processing pipeline buffer is created for each source
+ * surface we want to process. However, buffers holding filter
+ * parameters can be created once and for all. Rationale is to avoid
+ * multiple creation/destruction chains of filter buffers and also
+ * because filter parameters generally won't change frame after
+ * frame. e.g. this makes it possible to implement a checkerboard of
+ * videos where the same filters are applied to each video source.
+ *
+ * The general control flow is demonstrated by the following pseudo-code:
+ * \code
+ * // Create filters
+ * VABufferID denoise_filter, deint_filter;
+ * VABufferID filter_bufs[VAProcFilterCount];
+ * unsigned int num_filter_bufs;
+ *
+ * for (i = 0; i < num_filters; i++) {
+ *     switch (filters[i]) {
+ *     case VAProcFilterNoiseReduction: {       // Noise reduction filter
+ *         VAProcFilterParameterBuffer denoise;
+ *         denoise.type  = VAProcFilterNoiseReduction;
+ *         denoise.value = 0.5;
+ *         vaCreateBuffer(va_dpy, vpp_ctx,
+ *             VAProcFilterParameterBufferType, sizeof(denoise), 1,
+ *             &denoise, &denoise_filter
+ *         );
+ *         filter_bufs[num_filter_bufs++] = denoise_filter;
+ *         break;
+ *     }
+ *
+ *     case VAProcFilterDeinterlacing:          // Motion-adaptive deinterlacing
+ *         for (j = 0; j < num_deinterlacing_caps; j++) {
+ *             VAProcFilterCapDeinterlacing * const cap = &deinterlacing_caps[j];
+ *             if (cap->type != VAProcDeinterlacingMotionAdaptive)
+ *                 continue;
+ *
+ *             VAProcFilterParameterBufferDeinterlacing deint;
+ *             deint.type                   = VAProcFilterDeinterlacing;
+ *             deint.algorithm              = VAProcDeinterlacingMotionAdaptive;
+ *             vaCreateBuffer(va_dpy, vpp_ctx,
+ *                 VAProcFilterParameterBufferType, sizeof(deint), 1,
+ *                 &deint, &deint_filter
+ *             );
+ *             filter_bufs[num_filter_bufs++] = deint_filter;
+ *         }
+ *     }
+ * }
+ * \endcode
+ *
+ * Once the video processing pipeline is set up, the caller shall check the
+ * implied capabilities and requirements with vaQueryVideoProcPipelineCaps().
+ * This function can be used to validate the number of reference frames are
+ * needed by the specified deinterlacing algorithm, the supported color
+ * primaries, etc.
+ * \code
+ * // Create filters
+ * VAProcPipelineCaps pipeline_caps;
+ * VASurfaceID *forward_references;
+ * unsigned int num_forward_references;
+ * VASurfaceID *backward_references;
+ * unsigned int num_backward_references;
+ * VAProcColorStandardType in_color_standards[VAProcColorStandardCount];
+ * VAProcColorStandardType out_color_standards[VAProcColorStandardCount];
+ *
+ * pipeline_caps.input_color_standards      = NULL;
+ * pipeline_caps.num_input_color_standards  = ARRAY_ELEMS(in_color_standards);
+ * pipeline_caps.output_color_standards     = NULL;
+ * pipeline_caps.num_output_color_standards = ARRAY_ELEMS(out_color_standards);
+ * vaQueryVideoProcPipelineCaps(va_dpy, vpp_ctx,
+ *     filter_bufs, num_filter_bufs,
+ *     &pipeline_caps
+ * );
+ *
+ * num_forward_references  = pipeline_caps.num_forward_references;
+ * forward_references      =
+ *     malloc(num__forward_references * sizeof(VASurfaceID));
+ * num_backward_references = pipeline_caps.num_backward_references;
+ * backward_references     =
+ *     malloc(num_backward_references * sizeof(VASurfaceID));
+ * \endcode
+ *
+ * \section api_vpp_submit Send video processing parameters through VA buffers
+ *
+ * Video processing pipeline parameters are submitted for each source
+ * surface to process. Video filter parameters can also change, per-surface.
+ * e.g. the list of reference frames used for deinterlacing.
+ *
+ * \code
+ * foreach (iteration) {
+ *     vaBeginPicture(va_dpy, vpp_ctx, vpp_surface);
+ *     foreach (surface) {
+ *         VARectangle output_region;
+ *         VABufferID pipeline_buf;
+ *         VAProcPipelineParameterBuffer *pipeline_param;
+ *
+ *         vaCreateBuffer(va_dpy, vpp_ctx,
+ *             VAProcPipelineParameterBuffer, sizeof(*pipeline_param), 1,
+ *             NULL, &pipeline_buf
+ *         );
+ *
+ *         // Setup output region for this surface
+ *         // e.g. upper left corner for the first surface
+ *         output_region.x     = BORDER;
+ *         output_region.y     = BORDER;
+ *         output_region.width =
+ *             (vpp_surface_width - (Nx_surfaces + 1) * BORDER) / Nx_surfaces;
+ *         output_region.height =
+ *             (vpp_surface_height - (Ny_surfaces + 1) * BORDER) / Ny_surfaces;
+ *
+ *         vaMapBuffer(va_dpy, pipeline_buf, &pipeline_param);
+ *         pipeline_param->surface              = surface;
+ *         pipeline_param->surface_region       = NULL;
+ *         pipeline_param->output_region        = &output_region;
+ *         pipeline_param->output_background_color = 0;
+ *         if (first surface to render)
+ *             pipeline_param->output_background_color = 0xff000000; // black
+ *         pipeline_param->filter_flags         = VA_FILTER_SCALING_HQ;
+ *         pipeline_param->filters              = filter_bufs;
+ *         pipeline_param->num_filters          = num_filter_bufs;
+ *         vaUnmapBuffer(va_dpy, pipeline_buf);
+ *
+ *         // Update reference frames for deinterlacing, if necessary
+ *         pipeline_param->forward_references      = forward_references;
+ *         pipeline_param->num_forward_references  = num_forward_references_used;
+ *         pipeline_param->backward_references     = backward_references;
+ *         pipeline_param->num_backward_references = num_bacward_references_used;
+ *
+ *         // Apply filters
+ *         vaRenderPicture(va_dpy, vpp_ctx, &pipeline_buf, 1);
+ *     }
+ *     vaEndPicture(va_dpy, vpp_ctx);
+ * }
+ * \endcode
+ */
+
+/** \brief Video filter types. */
+typedef enum _VAProcFilterType {
+    VAProcFilterNone = 0,
+    /** \brief Noise reduction filter. */
+    VAProcFilterNoiseReduction,
+    /** \brief Deinterlacing filter. */
+    VAProcFilterDeinterlacing,
+    /** \brief Sharpening filter. */
+    VAProcFilterSharpening,
+    /** \brief Color balance parameters. */
+    VAProcFilterColorBalance,
+    VAProcFilterCount
+} VAProcFilterType;
+
+/** \brief Deinterlacing types. */
+typedef enum _VAProcDeinterlacingType {
+    VAProcDeinterlacingNone = 0,
+    /** \brief Bob deinterlacing algorithm. */
+    VAProcDeinterlacingBob,
+    /** \brief Weave deinterlacing algorithm. */
+    VAProcDeinterlacingWeave,
+    /** \brief Motion adaptive deinterlacing algorithm. */
+    VAProcDeinterlacingMotionAdaptive,
+    /** \brief Motion compensated deinterlacing algorithm. */
+    VAProcDeinterlacingMotionCompensated,
+    /** \brief Number of deinterlacing algorithms. */
+    VAProcDeinterlacingCount
+} VAProcDeinterlacingType;
+
+/** \brief Color balance types. */
+typedef enum _VAProcColorBalanceType {
+    VAProcColorBalanceNone = 0,
+    /** \brief Hue. */
+    VAProcColorBalanceHue,
+    /** \brief Saturation. */
+    VAProcColorBalanceSaturation,
+    /** \brief Brightness. */
+    VAProcColorBalanceBrightness,
+    /** \brief Contrast. */
+    VAProcColorBalanceContrast,
+    /** \brief Automatically adjusted saturation. */
+    VAProcColorBalanceAutoSaturation,
+    /** \brief Automatically adjusted brightness. */
+    VAProcColorBalanceAutoBrightness,
+    /** \brief Automatically adjusted contrast. */
+    VAProcColorBalanceAutoContrast,
+    /** \brief Number of color balance attributes. */
+    VAProcColorBalanceCount
+} VAProcColorBalanceType;
+
+/** \brief Color standard types. */
+typedef enum _VAProcColorStandardType {
+    VAProcColorStandardNone = 0,
+    /** \brief ITU-R BT.601. */
+    VAProcColorStandardBT601,
+    /** \brief ITU-R BT.709. */
+    VAProcColorStandardBT709,
+    /** \brief ITU-R BT.470-2 System M. */
+    VAProcColorStandardBT470M,
+    /** \brief ITU-R BT.470-2 System B, G. */
+    VAProcColorStandardBT470BG,
+    /** \brief SMPTE-170M. */
+    VAProcColorStandardSMPTE170M,
+    /** \brief SMPTE-240M. */
+    VAProcColorStandardSMPTE240M,
+    /** \brief Generic film. */
+    VAProcColorStandardGenericFilm,
+    /** \brief Number of color standards. */
+    VAProcColorStandardCount
+} VAProcColorStandardType;
+
+/** @name Video pipeline flags */
+/**@{*/
+/** \brief Specifies whether to apply subpictures when processing a surface. */
+#define VA_PROC_PIPELINE_SUBPICTURES    0x00000001
+/**
+ * \brief Specifies whether to apply power or performance
+ * optimizations to a pipeline.
+ *
+ * When processing several surfaces, it may be necessary to prioritize
+ * more certain pipelines than others. This flag is only a hint to the
+ * video processor so that it can omit certain filters to save power
+ * for example. Typically, this flag could be used with video surfaces
+ * decoded from a secondary bitstream.
+ */
+#define VA_PROC_PIPELINE_FAST           0x00000002
+/**@}*/
+
+/** @name Video filter flags */
+/**@{*/
+/** \brief Specifies whether the filter shall be present in the pipeline. */
+#define VA_PROC_FILTER_MANDATORY        0x00000001
+/**@}*/
+
+/** @name Pipeline end flags */
+/**@{*/
+/** \brief Specifies the pipeline is the last. */
+#define VA_PIPELINE_FLAG_END            0x00000004
+/**@}*/
+
+/** \brief Video processing pipeline capabilities. */
+typedef struct _VAProcPipelineCaps {
+    /** \brief Pipeline flags. See VAProcPipelineParameterBuffer::pipeline_flags. */
+    unsigned int        pipeline_flags;
+    /** \brief Extra filter flags. See VAProcPipelineParameterBuffer::filter_flags. */
+    unsigned int        filter_flags;
+    /** \brief Number of forward reference frames that are needed. */
+    unsigned int        num_forward_references;
+    /** \brief Number of backward reference frames that are needed. */
+    unsigned int        num_backward_references;
+    /** \brief List of color standards supported on input. */
+    VAProcColorStandardType *input_color_standards;
+    /** \brief Number of elements in \ref input_color_standards array. */
+    unsigned int        num_input_color_standards;
+    /** \brief List of color standards supported on output. */
+    VAProcColorStandardType *output_color_standards;
+    /** \brief Number of elements in \ref output_color_standards array. */
+    unsigned int        num_output_color_standards;
+} VAProcPipelineCaps;
+
+/** \brief Specification of values supported by the filter. */
+typedef struct _VAProcFilterValueRange {
+    /** \brief Minimum value supported, inclusive. */
+    float               min_value;
+    /** \brief Maximum value supported, inclusive. */
+    float               max_value;
+    /** \brief Default value. */
+    float               default_value;
+    /** \brief Step value that alters the filter behaviour in a sensible way. */
+    float               step;
+} VAProcFilterValueRange;
+
+/**
+ * \brief Video processing pipeline configuration.
+ *
+ * This buffer defines a video processing pipeline. As for any buffer
+ * passed to \c vaRenderPicture(), this is a one-time usage model.
+ * However, the actual filters to be applied are provided in the
+ * \c filters field, so they can be re-used in other processing
+ * pipelines.
+ *
+ * The target surface is specified by the \c render_target argument of
+ * \c vaBeginPicture(). The general usage model is described as follows:
+ * - \c vaBeginPicture(): specify the target surface that receives the
+ *   processed output;
+ * - \c vaRenderPicture(): specify a surface to be processed and composed
+ *   into the \c render_target. Use as many \c vaRenderPicture() calls as
+ *   necessary surfaces to compose ;
+ * - \c vaEndPicture(): tell the driver to start processing the surfaces
+ *   with the requested filters.
+ *
+ * If a filter (e.g. noise reduction) needs to be applied with different
+ * values for multiple surfaces, the application needs to create as many
+ * filter parameter buffers as necessary. i.e. the filter parameters shall
+ * not change between two calls to \c vaRenderPicture().
+ *
+ * For composition usage models, the first surface to process will generally
+ * use an opaque background color, i.e. \c output_background_color set with
+ * the most significant byte set to \c 0xff. For instance, \c 0xff000000 for
+ * a black background. Then, subsequent surfaces would use a transparent
+ * background color.
+ */
+typedef struct _VAProcPipelineParameterBuffer {
+    /**
+     * \brief Source surface ID.
+     *
+     * ID of the source surface to process. If subpictures are associated
+     * with the video surfaces then they shall be rendered to the target
+     * surface, if the #VA_PROC_PIPELINE_SUBPICTURES pipeline flag is set.
+     */
+    VASurfaceID         surface;
+    /**
+     * \brief Region within the source surface to be processed.
+     *
+     * Pointer to a #VARectangle defining the region within the source
+     * surface to be processed. If NULL, \c surface_region implies the
+     * whole surface.
+     */
+    const VARectangle  *surface_region;
+    /**
+     * \brief Requested input color primaries.
+     *
+     * Color primaries are implicitly converted throughout the processing
+     * pipeline. The video processor chooses the best moment to apply
+     * this conversion. The set of supported color primaries primaries
+     * for input shall be queried with vaQueryVideoProcPipelineCaps().
+     */
+    VAProcColorStandardType surface_color_standard;
+    /**
+     * \brief Region within the output surface.
+     *
+     * Pointer to a #VARectangle defining the region within the output
+     * surface that receives the processed pixels. If NULL, \c output_region
+     * implies the whole surface. 
+     *
+     * Note that any pixels residing outside the specified region will
+     * be filled in with the \ref output_background_color.
+     */
+    const VARectangle  *output_region;
+    /**
+     * \brief Background color.
+     *
+     * Background color used to fill in pixels that reside outside of the
+     * specified \ref output_region. The color is specified in ARGB format:
+     * [31:24] alpha, [23:16] red, [15:8] green, [7:0] blue.
+     *
+     * Unless the alpha value is zero or the \ref output_region represents
+     * the whole target surface size, implementations shall not render the
+     * source surface to the target surface directly. Rather, in order to
+     * maintain the exact semantics of \ref output_background_color, the
+     * driver shall use a temporary surface and fill it in with the
+     * appropriate background color. Next, the driver will blend this
+     * temporary surface into the target surface.
+     */
+    unsigned int        output_background_color;
+    /**
+     * \brief Requested output color primaries.
+     */
+    VAProcColorStandardType output_color_standard;
+    /**
+     * \brief Pipeline filters. See video pipeline flags.
+     *
+     * Flags to control the pipeline, like whether to apply subpictures
+     * or not, notify the driver that it can opt for power optimizations,
+     * should this be needed.
+     */
+    unsigned int        pipeline_flags;
+    /**
+     * \brief Extra filter flags. See vaPutSurface() flags.
+     *
+     * Filter flags are used as a fast path, wherever possible, to use
+     * vaPutSurface() flags instead of explicit filter parameter buffers.
+     *
+     * Allowed filter flags API-wise. Use vaQueryVideoProcPipelineCaps()
+     * to check for implementation details:
+     * - Bob-deinterlacing: \c VA_FRAME_PICTURE, \c VA_TOP_FIELD,
+     *   \c VA_BOTTOM_FIELD. Note that any deinterlacing filter
+     *   (#VAProcFilterDeinterlacing) will override those flags.
+     * - Color space conversion: \c VA_SRC_BT601, \c VA_SRC_BT709,
+     *   \c VA_SRC_SMPTE_240. 
+     * - Scaling: \c VA_FILTER_SCALING_DEFAULT, \c VA_FILTER_SCALING_FAST,
+     *   \c VA_FILTER_SCALING_HQ, \c VA_FILTER_SCALING_NL_ANAMORPHIC.
+     */
+    unsigned int        filter_flags;
+    /**
+     * \brief Array of filters to apply to the surface.
+     *
+     * The list of filters shall be ordered in the same way the driver expects
+     * them. i.e. as was returned from vaQueryVideoProcFilters().
+     * Otherwise, a #VA_STATUS_ERROR_INVALID_FILTER_CHAIN is returned
+     * from vaRenderPicture() with this buffer.
+     *
+     * #VA_STATUS_ERROR_UNSUPPORTED_FILTER is returned if the list
+     * contains an unsupported filter.
+     *
+     * Note: no filter buffer is destroyed after a call to vaRenderPicture(),
+     * only this pipeline buffer will be destroyed as per the core API
+     * specification. This allows for flexibility in re-using the filter for
+     * other surfaces to be processed.
+     */
+    VABufferID         *filters;
+    /** \brief Actual number of filters. */
+    unsigned int        num_filters;
+    /** \brief Array of forward reference frames. */
+    VASurfaceID        *forward_references;
+    /** \brief Number of forward reference frames that were supplied. */
+    unsigned int        num_forward_references;
+    /** \brief Array of backward reference frames. */
+    VASurfaceID        *backward_references;
+    /** \brief Number of backward reference frames that were supplied. */
+    unsigned int        num_backward_references;
+} VAProcPipelineParameterBuffer;
+
+/**
+ * \brief Filter parameter buffer base.
+ *
+ * This is a helper structure used by driver implementations only.
+ * Users are not supposed to allocate filter parameter buffers of this
+ * type.
+ */
+typedef struct _VAProcFilterParameterBufferBase {
+    /** \brief Filter type. */
+    VAProcFilterType    type;
+} VAProcFilterParameterBufferBase;
+
+/**
+ * \brief Default filter parametrization.
+ *
+ * Unless there is a filter-specific parameter buffer,
+ * #VAProcFilterParameterBuffer is the default type to use.
+ */
+typedef struct _VAProcFilterParameterBuffer {
+    /** \brief Filter type. */
+    VAProcFilterType    type;
+    /** \brief Value. */
+    float               value;
+} VAProcFilterParameterBuffer;
+
+/** @name De-interlacing flags */
+/**@{*/
+/** 
+ * \brief Bottom field first in the input frame. 
+ * if this is not set then assumes top field first.
+ */
+#define VA_DEINTERLACING_BOTTOM_FIELD_FIRST     0x0001
+/** 
+ * \brief Bottom field used in deinterlacing. 
+ * if this is not set then assumes top field is used.
+ */
+#define VA_DEINTERLACING_BOTTOM_FIELD           0x0002
+/** 
+ * \brief A single field is stored in the input frame. 
+ * if this is not set then assumes the frame contains two interleaved fields.
+ */
+#define VA_DEINTERLACING_ONE_FIELD              0x0004
+/**@}*/
+
+/** \brief Deinterlacing filter parametrization. */
+typedef struct _VAProcFilterParameterBufferDeinterlacing {
+    /** \brief Filter type. Shall be set to #VAProcFilterDeinterlacing. */
+    VAProcFilterType            type;
+    /** \brief Deinterlacing algorithm. */
+    VAProcDeinterlacingType     algorithm;
+    /** \brief Deinterlacing flags. */
+    unsigned int                flags;
+} VAProcFilterParameterBufferDeinterlacing;
+
+/**
+ * \brief Color balance filter parametrization.
+ *
+ * This buffer defines color balance attributes. A VA buffer can hold
+ * several color balance attributes by creating a VA buffer of desired
+ * number of elements. This can be achieved by the following pseudo-code:
+ *
+ * \code
+ * enum { kHue, kSaturation, kBrightness, kContrast };
+ *
+ * // Initial color balance parameters
+ * static const VAProcFilterParameterBufferColorBalance colorBalanceParams[4] =
+ * {
+ *     [kHue] =
+ *         { VAProcFilterColorBalance, VAProcColorBalanceHue, 0.5 },
+ *     [kSaturation] =
+ *         { VAProcFilterColorBalance, VAProcColorBalanceSaturation, 0.5 },
+ *     [kBrightness] =
+ *         { VAProcFilterColorBalance, VAProcColorBalanceBrightness, 0.5 },
+ *     [kSaturation] =
+ *         { VAProcFilterColorBalance, VAProcColorBalanceSaturation, 0.5 }
+ * };
+ *
+ * // Create buffer
+ * VABufferID colorBalanceBuffer;
+ * vaCreateBuffer(va_dpy, vpp_ctx,
+ *     VAProcFilterParameterBufferType, sizeof(*pColorBalanceParam), 4,
+ *     colorBalanceParams,
+ *     &colorBalanceBuffer
+ * );
+ *
+ * VAProcFilterParameterBufferColorBalance *pColorBalanceParam;
+ * vaMapBuffer(va_dpy, colorBalanceBuffer, &pColorBalanceParam);
+ * {
+ *     // Change brightness only
+ *     pColorBalanceBuffer[kBrightness].value = 0.75;
+ * }
+ * vaUnmapBuffer(va_dpy, colorBalanceBuffer);
+ * \endcode
+ */
+typedef struct _VAProcFilterParameterBufferColorBalance {
+    /** \brief Filter type. Shall be set to #VAProcFilterColorBalance. */
+    VAProcFilterType            type;
+    /** \brief Color balance attribute. */
+    VAProcColorBalanceType      attrib;
+    /**
+     * \brief Color balance value.
+     *
+     * Special case for automatically adjusted attributes. e.g. 
+     * #VAProcColorBalanceAutoSaturation,
+     * #VAProcColorBalanceAutoBrightness,
+     * #VAProcColorBalanceAutoContrast.
+     * - If \ref value is \c 1.0 +/- \c FLT_EPSILON, the attribute is
+     *   automatically adjusted and overrides any other attribute of
+     *   the same type that would have been set explicitly;
+     * - If \ref value is \c 0.0 +/- \c FLT_EPSILON, the attribute is
+     *   disabled and other attribute of the same type is used instead.
+     */
+    float                       value;
+} VAProcFilterParameterBufferColorBalance;
+
+/**
+ * \brief Default filter cap specification (single range value).
+ *
+ * Unless there is a filter-specific cap structure, #VAProcFilterCap is the
+ * default type to use for output caps from vaQueryVideoProcFilterCaps().
+ */
+typedef struct _VAProcFilterCap {
+    /** \brief Range of supported values for the filter. */
+    VAProcFilterValueRange      range;
+} VAProcFilterCap;
+
+/** \brief Capabilities specification for the deinterlacing filter. */
+typedef struct _VAProcFilterCapDeinterlacing {
+    /** \brief Deinterlacing algorithm. */
+    VAProcDeinterlacingType     type;
+} VAProcFilterCapDeinterlacing;
+
+/** \brief Capabilities specification for the color balance filter. */
+typedef struct _VAProcFilterCapColorBalance {
+    /** \brief Color balance operation. */
+    VAProcColorBalanceType      type;
+    /** \brief Range of supported values for the specified operation. */
+    VAProcFilterValueRange      range;
+} VAProcFilterCapColorBalance;
+
+/**
+ * \brief Queries video processing filters.
+ *
+ * This function returns the list of video processing filters supported
+ * by the driver. The \c filters array is allocated by the user and
+ * \c num_filters shall be initialized to the number of allocated
+ * elements in that array. Upon successful return, the actual number
+ * of filters will be overwritten into \c num_filters. Otherwise,
+ * \c VA_STATUS_ERROR_MAX_NUM_EXCEEDED is returned and \c num_filters
+ * is adjusted to the number of elements that would be returned if enough
+ * space was available.
+ *
+ * The list of video processing filters supported by the driver shall
+ * be ordered in the way they can be iteratively applied. This is needed
+ * for both correctness, i.e. some filters would not mean anything if
+ * applied at the beginning of the pipeline; but also for performance
+ * since some filters can be applied in a single pass (e.g. noise
+ * reduction + deinterlacing).
+ *
+ * @param[in] dpy               the VA display
+ * @param[in] context           the video processing context
+ * @param[out] filters          the output array of #VAProcFilterType elements
+ * @param[in,out] num_filters the number of elements allocated on input,
+ *      the number of elements actually filled in on output
+ */
+VAStatus
+vaQueryVideoProcFilters(
+    VADisplay           dpy,
+    VAContextID         context,
+    VAProcFilterType   *filters,
+    unsigned int       *num_filters
+);
+
+/**
+ * \brief Queries video filter capabilities.
+ *
+ * This function returns the list of capabilities supported by the driver
+ * for a specific video filter. The \c filter_caps array is allocated by
+ * the user and \c num_filter_caps shall be initialized to the number
+ * of allocated elements in that array. Upon successful return, the
+ * actual number of filters will be overwritten into \c num_filter_caps.
+ * Otherwise, \c VA_STATUS_ERROR_MAX_NUM_EXCEEDED is returned and
+ * \c num_filter_caps is adjusted to the number of elements that would be
+ * returned if enough space was available.
+ *
+ * @param[in] dpy               the VA display
+ * @param[in] context           the video processing context
+ * @param[in] type              the video filter type
+ * @param[out] filter_caps      the output array of #VAProcFilterCap elements
+ * @param[in,out] num_filter_caps the number of elements allocated on input,
+ *      the number of elements actually filled in output
+ */
+VAStatus
+vaQueryVideoProcFilterCaps(
+    VADisplay           dpy,
+    VAContextID         context,
+    VAProcFilterType    type,
+    void               *filter_caps,
+    unsigned int       *num_filter_caps
+);
+
+/**
+ * \brief Queries video processing pipeline capabilities.
+ *
+ * This function returns the video processing pipeline capabilities. The
+ * \c filters array defines the video processing pipeline and is an array
+ * of buffers holding filter parameters.
+ *
+ * Note: the #VAProcPipelineCaps structure contains user-provided arrays.
+ * If non-NULL, the corresponding \c num_* fields shall be filled in on
+ * input with the number of elements allocated. Upon successful return,
+ * the actual number of elements will be overwritten into the \c num_*
+ * fields. Otherwise, \c VA_STATUS_ERROR_MAX_NUM_EXCEEDED is returned
+ * and \c num_* fields are adjusted to the number of elements that would
+ * be returned if enough space was available.
+ *
+ * @param[in] dpy               the VA display
+ * @param[in] context           the video processing context
+ * @param[in] filters           the array of VA buffers defining the video
+ *      processing pipeline
+ * @param[in] num_filters       the number of elements in filters
+ * @param[in,out] pipeline_caps the video processing pipeline capabilities
+ */
+VAStatus
+vaQueryVideoProcPipelineCaps(
+    VADisplay           dpy,
+    VAContextID         context,
+    VABufferID         *filters,
+    unsigned int        num_filters,
+    VAProcPipelineCaps *pipeline_caps
+);
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* VA_VPP_H */