/*
* 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,
/** \brief Skin Tone Enhancement. */
VAProcFilterSkinToneEnhancement,
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 */