struct GstVaapiContext

struct GstVaapiContext;

A VA context wrapper.

struct GstVaapiContextClass

struct GstVaapiContextClass {
};

A VA context wrapper class.

gst_vaapi_context_new ()

GstVaapiContext *   gst_vaapi_context_new               (GstVaapiDisplay *display,
                                                         GstVaapiProfile profile,
                                                         GstVaapiEntrypoint entrypoint,
                                                         guint width,
                                                         guint height);

Creates a new GstVaapiContext with the specified codec profile and entrypoint.

gst_vaapi_context_reset ()

gboolean            gst_vaapi_context_reset             (GstVaapiContext *context,
                                                         GstVaapiProfile profile,
                                                         GstVaapiEntrypoint entrypoint,
                                                         unsigned int width,
                                                         unsigned int height);

Resets context to the specified codec profile and entrypoint. The surfaces will be reallocated if the coded size changed.

gst_vaapi_context_get_id ()

GstVaapiID          gst_vaapi_context_get_id            (GstVaapiContext *context);

Returns the underlying VAContextID of the context.

gst_vaapi_context_get_profile ()

GstVaapiProfile     gst_vaapi_context_get_profile       (GstVaapiContext *context);

Returns the VA profile used by the context.

gst_vaapi_context_set_profile ()

gboolean            gst_vaapi_context_set_profile       (GstVaapiContext *context,
                                                         GstVaapiProfile profile);

Sets the new profile to use with the context. If profile matches the previous profile, this call has no effect. Otherwise, the underlying VA context is recreated, while keeping the previously allocated surfaces.

gst_vaapi_context_get_entrypoint ()

GstVaapiEntrypoint  gst_vaapi_context_get_entrypoint    (GstVaapiContext *context);

Returns the VA entrypoint used by the context

gst_vaapi_context_get_size ()

void                gst_vaapi_context_get_size          (GstVaapiContext *context,
                                                         guint *pwidth,
                                                         guint *pheight);

Retrieves the size of the surfaces attached to context.

gst_vaapi_context_get_surface ()

GstVaapiSurface *   gst_vaapi_context_get_surface       (GstVaapiContext *context);

Acquires a free surface. The returned surface but be released with gst_vaapi_context_put_surface(). This function returns NULL if there is no free surface available in the pool. The surfaces are pre-allocated during context creation though.

gst_vaapi_context_get_surface_count ()

guint               gst_vaapi_context_get_surface_count (GstVaapiContext *context);

Retrieves the number of free surfaces left in the pool.

gst_vaapi_context_put_surface ()

void                gst_vaapi_context_put_surface       (GstVaapiContext *context,
                                                         GstVaapiSurface *surface);

Releases a surface acquired by gst_vaapi_context_get_surface().

gst_vaapi_context_find_surface_by_id ()

GstVaapiSurface *   gst_vaapi_context_find_surface_by_id
                                                        (GstVaapiContext *context,
                                                         GstVaapiID id);

Finds VA surface by id in the list of surfaces attached to the context.

gst_vaapi_context_apply_composition ()

gboolean            gst_vaapi_context_apply_composition (GstVaapiContext *context,
                                                         GstVideoOverlayComposition *composition);

Applies video composition planes to all surfaces bound to context. This helper function resets any additional subpictures the user may have associated himself. A NULL composition will also clear all the existing subpictures.

The "entrypoint" property

  "entrypoint"               guint                 : Read / Write / Construct Only

The decoder entrypoint.

Default value: 0

The "height" property

  "height"                   guint                 : Read / Write / Construct Only

The height of the decoded surfaces.

Allowed values: <= G_MAXLONG

Default value: 0

The "profile" property

  "profile"                  guint                 : Read / Write

The profile used for decoding.

Default value: 0

The "width" property

  "width"                    guint                 : Read / Write / Construct Only

The width of decoded surfaces.

Allowed values: <= G_MAXLONG

Default value: 0