* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#ifndef FFMPEG_AVFILTER_H
-#define FFMPEG_AVFILTER_H
+#ifndef AVFILTER_AVFILTER_H
+#define AVFILTER_AVFILTER_H
+
+#define LIBAVFILTER_VERSION_MAJOR 0
+#define LIBAVFILTER_VERSION_MINOR 4
+#define LIBAVFILTER_VERSION_MICRO 0
+
+#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
+ LIBAVFILTER_VERSION_MINOR, \
+ LIBAVFILTER_VERSION_MICRO)
+#define LIBAVFILTER_VERSION AV_VERSION(LIBAVFILTER_VERSION_MAJOR, \
+ LIBAVFILTER_VERSION_MINOR, \
+ LIBAVFILTER_VERSION_MICRO)
+#define LIBAVFILTER_BUILD LIBAVFILTER_VERSION_INT
#include <stddef.h>
-#include "avcodec.h"
+#include "libavcodec/avcodec.h"
+
+/**
+ * Returns the LIBAVFILTER_VERSION_INT constant.
+ */
+unsigned avfilter_version(void);
typedef struct AVFilterContext AVFilterContext;
typedef struct AVFilterLink AVFilterLink;
* list of the formats supported by each input and output pad. The list
* given for each pad need not be distinct - they may be references to the
* same list of formats, as is often the case when a filter supports multiple
- * formats, but will always outut the same format as it is given in input.
+ * formats, but will always output the same format as it is given in input.
*
* In this way, a list of possible input formats and a list of possible
* output formats are associated with each link. When a set of formats is
AVFilterFormats *avfilter_make_format_list(int len, ...);
/**
- * Returns a fairly comprehensive list of colorspaces which are supported by
- * many of the included filters. This is not truly "all" the colorspaces, but
- * it is most of them, and it is the most commonly supported large subset.
+ * Returns a list of all colorspaces supported by FFmpeg.
*/
AVFilterFormats *avfilter_all_colorspaces(void);
/**
- * If a and b share at least one common format, they are merged into a new
- * format list which is returned. All the references to a and b are updated
- * to point to this new list, and a and b are deallocated.
+ * Returns a format list which contains the intersection of the formats of
+ * a and b. Also, all the references of a, all the references of b, and
+ * a and b themselves will be deallocated.
*
* If a and b do not share any common formats, neither is modified, and NULL
* is returned.
*/
AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b);
-/** Adds *ref as a new reference to f */
-void avfilter_formats_ref(AVFilterFormats *f, AVFilterFormats **ref);
+/**
+ * Adds *ref as a new reference to formats.
+ * That is the pointers will point like in the ascii art below:
+ * ________
+ * |formats |<--------.
+ * | ____ | ____|___________________
+ * | |refs| | | __|_
+ * | |* * | | | | | | AVFilterLink
+ * | |* *--------->|*ref|
+ * | |____| | | |____|
+ * |________| |________________________
+ */
+void avfilter_formats_ref(AVFilterFormats *formats, AVFilterFormats **ref);
/**
* Remove *ref as a reference to the format list it currently points to,
* deallocate that list if this was the last reference, and set *ref to NULL.
+ *
+ * Before After
+ * ________ ________ NULL
+ * |formats |<--------. |formats | ^
+ * | ____ | ____|________________ | ____ | ____|________________
+ * | |refs| | | __|_ | |refs| | | __|_
+ * | |* * | | | | | | AVFilterLink | |* * | | | | | | AVFilterLink
+ * | |* *--------->|*ref| | |* | | | |*ref|
+ * | |____| | | |____| | |____| | | |____|
+ * |________| |_____________________ |________| |_____________________
*/
void avfilter_formats_unref(AVFilterFormats **ref);
-int avfilter_poll_frame(AVFilterLink *link);
+/**
+ *
+ * Before After
+ * ________ ________
+ * |formats |<---------. |formats |<---------.
+ * | ____ | ___|___ | ____ | ___|___
+ * | |refs| | | | | | |refs| | | | | NULL
+ * | |* *--------->|*oldref| | |* *--------->|*newref| ^
+ * | |* * | | |_______| | |* * | | |_______| ___|___
+ * | |____| | | |____| | | | |
+ * |________| |________| |*oldref|
+ * |_______|
+ */
+void avfilter_formats_changeref(AVFilterFormats **oldref,
+ AVFilterFormats **newref);
/**
* A filter pad used for either input or output.
* AVFilterPad type. Only video supported now, hopefully someone will
* add audio in the future.
*/
- int type;
-#define AV_PAD_VIDEO 0 ///< video pad
+ enum CodecType type;
/**
- * Minimum required permissions on incoming buffers. Any buffers with
+ * Minimum required permissions on incoming buffers. Any buffer with
* insufficient permissions will be automatically copied by the filter
* system to a new buffer which provides the needed access permissions.
*
/**
* Permissions which are not accepted on incoming buffers. Any buffer
- * which has any of these permissions set be automatically copied by the
- * filter system to a new buffer which does not have those permissions.
- * This can be used to easily disallow buffers with AV_PERM_REUSE.
+ * which has any of these permissions set will be automatically copied
+ * by the filter system to a new buffer which does not have those
+ * permissions. This can be used to easily disallow buffers with
+ * AV_PERM_REUSE.
*
* Input pads only.
*/
int (*config_props)(AVFilterLink *link);
};
-/** Default handler for start_frame() for video inputs */
+/** default handler for start_frame() for video inputs */
void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref);
-/** Default handler for end_frame() for video inputs */
+/** default handler for draw_slice() for video inputs */
+void avfilter_default_draw_slice(AVFilterLink *link, int y, int h);
+/** default handler for end_frame() for video inputs */
void avfilter_default_end_frame(AVFilterLink *link);
-/** Default handler for config_props() for video outputs */
+/** default handler for config_props() for video outputs */
int avfilter_default_config_output_link(AVFilterLink *link);
-/** Default handler for config_props() for video inputs */
+/** default handler for config_props() for video inputs */
int avfilter_default_config_input_link (AVFilterLink *link);
-/** Default handler for get_video_buffer() for video inputs */
+/** default handler for get_video_buffer() for video inputs */
AVFilterPicRef *avfilter_default_get_video_buffer(AVFilterLink *link,
int perms);
/**
/** Default handler for query_formats() */
int avfilter_default_query_formats(AVFilterContext *ctx);
-void avfilter_formats_changeref(AVFilterFormats **oldref,
- AVFilterFormats **newref);
-
/**
* Filter definition. This defines the pads a filter contains, and all the
* callback functions used to interact with the filter.
typedef struct
{
const char *name; ///< filter name
- const char *author; ///< filter author
int priv_size; ///< size of private data to allocate for the filter
/** An instance of a filter */
struct AVFilterContext
{
- AVClass *av_class; ///< needed for av_log()
+ const AVClass *av_class; ///< needed for av_log()
AVFilter *filter; ///< the AVFilter of which this is an instance
/**
* A link between two filters. This contains pointers to the source and
- * destination filters between which this link exists, and the indices of
+ * destination filters between which this link exists, and the indexes of
* the pads involved. In addition, this link also contains the parameters
* which have been negotiated and agreed upon between the filter, such as
- * image dimensions, format, etc
+ * image dimensions, format, etc.
*/
struct AVFilterLink
{
int avfilter_config_links(AVFilterContext *filter);
/**
- * Request a picture buffer with a specific set of permissions
+ * Request a picture buffer with a specific set of permissions.
* @param link the output link to the filter from which the picture will
* be requested
* @param perms the required access permissions
* @param link the input link
* @return zero on success
*/
-int avfilter_request_frame(AVFilterLink *link);
+int avfilter_request_frame(AVFilterLink *link);
+
+/**
+ * Poll a frame from the filter chain.
+ * @param link the input link
+ * @return the number of immediately available frames, a negative
+ * number in case of error
+ */
+int avfilter_poll_frame(AVFilterLink *link);
/**
* Notify the next filter of the start of a frame.
void avfilter_start_frame(AVFilterLink *link, AVFilterPicRef *picref);
/**
- * Notify the next filter that the current frame has finished
+ * Notify the next filter that the current frame has finished.
* @param link the output link the frame was sent over
*/
void avfilter_end_frame(AVFilterLink *link);
void avfilter_draw_slice(AVFilterLink *link, int y, int h);
/** Initialize the filter system. Registers all builtin filters */
-void avfilter_init(void);
+void avfilter_register_all(void);
/** Uninitialize the filter system. Unregisters all filters */
void avfilter_uninit(void);
AVFilterPad **pads, AVFilterLink ***links,
AVFilterPad *newpad);
-/** insert a new input pad for the filter */
+/** Insert a new input pad for the filter. */
static inline void avfilter_insert_inpad(AVFilterContext *f, unsigned index,
AVFilterPad *p)
{
&f->input_pads, &f->inputs, p);
}
-/** insert a new output pad for the filter */
+/** Insert a new output pad for the filter. */
static inline void avfilter_insert_outpad(AVFilterContext *f, unsigned index,
AVFilterPad *p)
{
&f->output_pads, &f->outputs, p);
}
-#endif /* FFMPEG_AVFILTER_H */
+#endif /* AVFILTER_AVFILTER_H */
projects / ffmpeg / blobdiff