gst_vaapi_filter_new ()

GstVaapiFilter *
gst_vaapi_filter_new (GstVaapiDisplay *display);

Creates a new GstVaapiFilter set up to operate in "identity" mode. This means that no other operation than scaling is performed.

gst_vaapi_filter_ref ()

GstVaapiFilter *
gst_vaapi_filter_ref (GstVaapiFilter *filter);

Atomically increases the reference count of the given filter by one.

gst_vaapi_filter_unref ()

void
gst_vaapi_filter_unref (GstVaapiFilter *filter);

Atomically decreases the reference count of the filter by one. If the reference count reaches zero, the filter will be free'd.

gst_vaapi_filter_replace ()

void
gst_vaapi_filter_replace (GstVaapiFilter **old_filter_ptr,
                          GstVaapiFilter *new_filter);

Atomically replaces the filter held in old_filter_ptr with new_filter . This means that old_filter_ptr shall reference a valid filter. However, new_filter can be NULL.

gst_vaapi_filter_get_operations ()

GPtrArray *
gst_vaapi_filter_get_operations (GstVaapiFilter *filter);

Determines the set of supported operations for video processing. The caller owns an extra reference to the resulting array of GstVaapiFilterOpInfo elements, so it shall be released with g_ptr_array_unref() after usage.

If filter is NULL, then this function returns the video processing operations supported by this library.

gst_vaapi_filter_get_formats ()

GArray *
gst_vaapi_filter_get_formats (GstVaapiFilter *filter);

Determines the set of supported source or target formats for video processing. The caller owns an extra reference to the resulting array of GstVideoFormat elements, so it shall be released with g_array_unref() after usage.

gst_vaapi_filter_has_operation ()

gboolean
gst_vaapi_filter_has_operation (GstVaapiFilter *filter,
                                GstVaapiFilterOp op);

Determines whether the underlying VA driver advertises support for the supplied operation op .

gst_vaapi_filter_use_operation ()

gboolean
gst_vaapi_filter_use_operation (GstVaapiFilter *filter,
                                GstVaapiFilterOp op);

Determines whether the supplied operation op was already enabled through a prior call to gst_vaapi_filter_set_operation() or any other operation-specific function.

Note: should an operation be set to its default value, this means that it is actually not enabled.

gst_vaapi_filter_set_operation ()

gboolean
gst_vaapi_filter_set_operation (GstVaapiFilter *filter,
                                GstVaapiFilterOp op,
                                const GValue *value);

Enable the specified operation op to be performed during video processing, i.e. in gst_vaapi_filter_process(). The value argument specifies the operation settings. e.g. deinterlacing method for deinterlacing, denoising level for noise reduction, etc.

If value is NULL, then this function resets the operation settings to their default values.

gst_vaapi_filter_set_format ()

gboolean
gst_vaapi_filter_set_format (GstVaapiFilter *filter,
                             GstVideoFormat format);

Sets the desired pixel format of the resulting video processing operations.

If format is GST_VIDEO_FORMAT_UNKNOWN, the filter will assume iso format conversion, i.e. no color conversion at all and the target surface format shall match the source surface format.

If format is GST_VIDEO_FORMAT_ENCODED, the filter will use the pixel format of the target surface passed to gst_vaapi_filter_process().

gst_vaapi_filter_set_cropping_rectangle ()

gboolean
gst_vaapi_filter_set_cropping_rectangle
                               (GstVaapiFilter *filter,
                                const GstVaapiRectangle *rect);

Sets the source surface cropping rectangle to use during the video processing. If rect is NULL, the whole source surface will be used.

gst_vaapi_filter_set_target_rectangle ()

gboolean
gst_vaapi_filter_set_target_rectangle (GstVaapiFilter *filter,
                                       const GstVaapiRectangle *rect);

Sets the region within the target surface where the source surface would be rendered. i.e. where the hardware accelerator would emit the outcome of video processing. If rect is NULL, the whole source surface will be used.

gst_vaapi_filter_set_denoising_level ()

gboolean
gst_vaapi_filter_set_denoising_level (GstVaapiFilter *filter,
                                      gfloat level);

Sets the noise reduction level to apply. If level is 0.0f, this corresponds to disabling the noise reduction algorithm.

gst_vaapi_filter_set_sharpening_level ()

gboolean
gst_vaapi_filter_set_sharpening_level (GstVaapiFilter *filter,
                                       gfloat level);

Enables noise reduction with the specified factor.

gst_vaapi_filter_set_hue ()

gboolean
gst_vaapi_filter_set_hue (GstVaapiFilter *filter,
                          gfloat value);

Enables color hue adjustment to the specified value.

gst_vaapi_filter_set_brightness ()

gboolean
gst_vaapi_filter_set_brightness (GstVaapiFilter *filter,
                                 gfloat value);

Enables color brightness adjustment to the specified value.

gst_vaapi_filter_set_saturation ()

gboolean
gst_vaapi_filter_set_saturation (GstVaapiFilter *filter,
                                 gfloat value);

Enables color saturation adjustment to the specified value.

gst_vaapi_filter_set_deinterlacing ()

gboolean
gst_vaapi_filter_set_deinterlacing (GstVaapiFilter *filter,
                                    GstVaapiDeinterlaceMethod method,
                                    guint flags);

Applies deinterlacing to the video processing pipeline. If method is not GST_VAAPI_DEINTERLACE_METHOD_NONE , then flags could represent the initial picture structure of the source frame.

gst_vaapi_filter_set_deinterlacing_references ()

gboolean
gst_vaapi_filter_set_deinterlacing_references
                               (GstVaapiFilter *filter,
                                GstVaapiSurface **forward_references,
                                guint num_forward_references,
                                GstVaapiSurface **backward_references,
                                guint num_backward_references);

Specifies the list of surfaces used for forward or backward reference in advanced deinterlacing mode. The caller is responsible for maintaining the associated surfaces live until gst_vaapi_filter_process() completes. e.g. by holding an extra reference to the associated GstVaapiSurfaceProxy.

Temporal ordering is maintained as follows: the shorter index in either array is, the closest the matching surface is relatively to the current source surface to process. e.g. surface in forward_references array index 0 represents the immediately preceding surface in display order, surface at index 1 is the one preceding surface at index 0, etc.

The video processing filter will only use the recommended number of surfaces for backward and forward references.

Note: the supplied lists of reference surfaces are not sticky. This means that they are only valid for the next gst_vaapi_filter_process() call, and thus needs to be submitted again for subsequent calls.

GstVaapiFilter

typedef struct _GstVaapiFilter GstVaapiFilter;

enum GstVaapiFilterOp