#ifndef FFMPEG_AVFILTER_H
#define FFMPEG_AVFILTER_H
-#define LIBAVFILTER_VERSION 0.0.0
+#define LIBAVFILTER_VERSION_MAJOR 0
+#define LIBAVFILTER_VERSION_MINOR 1
+#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;
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. And all the references of a and b, and a and b 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);
+/**
+ *
+ * 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.
*/
/** 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.
/** 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