#ifndef AVFILTER_AVFILTER_H
#define AVFILTER_AVFILTER_H
+#include "libavutil/avutil.h"
+
#define LIBAVFILTER_VERSION_MAJOR 1
-#define LIBAVFILTER_VERSION_MINOR 4
+#define LIBAVFILTER_VERSION_MINOR 17
#define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
*/
unsigned avfilter_version(void);
+/**
+ * Returns the libavfilter build-time configuration.
+ */
+const char *avfilter_configuration(void);
+
+/**
+ * Returns the libavfilter license.
+ */
+const char *avfilter_license(void);
+
+
typedef struct AVFilterContext AVFilterContext;
typedef struct AVFilterLink AVFilterLink;
typedef struct AVFilterPad AVFilterPad;
*/
AVFilterFormats *avfilter_make_format_list(const enum PixelFormat *pix_fmts);
+/**
+ * Adds pix_fmt to the list of pixel formats contained in *avff.
+ * If *avff is NULL the function allocates the filter formats struct
+ * and puts its pointer in *avff.
+ *
+ * @return a non negative value in case of success, or a negative
+ * value corresponding to an AVERROR code in case of error
+ */
+int avfilter_add_colorspace(AVFilterFormats **avff, enum PixelFormat pix_fmt);
+
/**
* Returns a list of all colorspaces supported by FFmpeg.
*/
void avfilter_formats_ref(AVFilterFormats *formats, AVFilterFormats **ref);
/**
- * Removes *ref as a reference to the format list it currently points to,
- * deallocates that list if this was the last reference, and sets *ref to NULL.
+ * If *ref is non-NULL, removes *ref as a reference to the format list
+ * it currently points to, deallocates that list if this was the last
+ * reference, and sets *ref to NULL.
*
* Before After
* ________ ________ NULL
/**
* Callback function to get a buffer. If NULL, the filter system will
- * handle buffer requests.
+ * use avfilter_default_get_video_buffer().
*
* Input video pads only.
*/
*
* Input video pads only.
*/
- void (*draw_slice)(AVFilterLink *link, int y, int height);
+ void (*draw_slice)(AVFilterLink *link, int y, int height, int slice_dir);
/**
* Frame poll callback. This returns the number of immediately available
/** default handler for start_frame() for video inputs */
void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref);
/** default handler for draw_slice() for video inputs */
-void avfilter_default_draw_slice(AVFilterLink *link, int y, int h);
+void avfilter_default_draw_slice(AVFilterLink *link, int y, int h, int slice_dir);
/** default handler for end_frame() for video inputs */
void avfilter_default_end_frame(AVFilterLink *link);
/** default handler for config_props() for video outputs */
* Filter definition. This defines the pads a filter contains, and all the
* callback functions used to interact with the filter.
*/
-typedef struct
+typedef struct AVFilter
{
const char *name; ///< filter name
void (*uninit)(AVFilterContext *ctx);
/**
- * Query formats supported by the filter and its pads. Should set the
+ * Queries formats supported by the filter and its pads, and sets the
* in_formats for links connected to its output pads, and out_formats
* for links connected to its input pads.
*
- * Should return zero on success.
+ * @return zero on success, a negative value corresponding to an
+ * AVERROR code otherwise
*/
int (*query_formats)(AVFilterContext *);
const AVFilterPad *inputs; ///< NULL terminated list of inputs. NULL if none
const AVFilterPad *outputs; ///< NULL terminated list of outputs. NULL if none
+
+ /**
+ * A description for the filter. You should use the
+ * NULL_IF_CONFIG_SMALL() macro to define it.
+ */
+ const char *description;
} AVFilter;
/** An instance of a filter */
AVFilterLink **outputs; ///< array of pointers to output links
void *priv; ///< private data for use by the filter
-
- /**
- * A description for the filter. You should use the
- * NULL_IF_CONFIG_SMALL() macro to define it.
- */
- const char *description;
};
/**
/**
* Sends a slice to the next filter.
+ *
+ * Slices have to be provided in sequential order, either in
+ * top-bottom or bottom-top order. If slices are provided in
+ * non-sequential order the behavior of the function is undefined.
+ *
* @param link the output link over which the frame is being sent
* @param y offset in pixels from the top of the image for this slice
* @param h height of this slice in pixels
+ * @param slice_dir the assumed direction for sending slices,
+ * from the top slice to the bottom slice if the value is 1,
+ * from the bottom slice to the top slice if the value is -1,
+ * for other values the behavior of the function is undefined.
*/
-void avfilter_draw_slice(AVFilterLink *link, int y, int h);
+void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir);
-/** Initialize the filter system. Registers all builtin filters */
+/** Initializes the filter system. Registers all builtin filters. */
void avfilter_register_all(void);
-/** Uninitialize the filter system. Unregisters all filters */
+/** Uninitializes the filter system. Unregisters all filters. */
void avfilter_uninit(void);
/**
* filter can still by instantiated with avfilter_open even if it is not
* registered.
* @param filter the filter to register
+ * @return 0 if the registration was succesfull, a negative value
+ * otherwise
*/
-void avfilter_register(AVFilter *filter);
+int avfilter_register(AVFilter *filter);
/**
* Gets a filter definition matching the given name.
*/
AVFilter *avfilter_get_by_name(const char *name);
+/**
+ * If filter is NULL, returns a pointer to the first registered filter pointer,
+ * if filter is non-NULL, returns the next pointer after filter.
+ * If the returned pointer points to NULL, the last registered filter
+ * was already reached.
+ */
+AVFilter **av_filter_next(AVFilter **filter);
+
/**
* Creates a filter instance.
* @param filter the filter to create an instance of
projects / ffmpeg / blobdiff