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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MPLAYER_VF_H
#define MPLAYER_VF_H
#include <stdbool.h>
#include "video/mp_image.h"
#include "common/common.h"
struct MPOpts;
struct mpv_global;
struct vf_instance;
struct vf_priv_s;
struct m_obj_settings;
typedef struct vf_info {
const char *description;
const char *name;
int (*open)(struct vf_instance *vf);
int priv_size;
const void *priv_defaults;
const struct m_option *options;
void (*print_help)(struct mp_log *log);
} vf_info_t;
typedef struct vf_instance {
const vf_info_t *info;
// Initialize the filter. The filter must set *out to the same image
// params as the images the filter functions will return for the given
// *in format.
// Note that by default, only formats reported as supported by query_format
// will be allowed for *in.
// Returns >= 0 on success, < 0 on error.
int (*reconfig)(struct vf_instance *vf, struct mp_image_params *in,
struct mp_image_params *out);
int (*control)(struct vf_instance *vf, int request, void *data);
int (*query_format)(struct vf_instance *vf, unsigned int fmt);
// Filter mpi and return the result. The input mpi reference is owned by
// the filter, the returned reference is owned by the caller.
// Return NULL if the output frame is skipped.
struct mp_image *(*filter)(struct vf_instance *vf, struct mp_image *mpi);
// Like filter(), but can return an error code ( >= 0 means success). This
// callback is also more practical when the filter can return multiple
// output images. Use vf_add_output_frame() to queue output frames.
// Warning: this is called with mpi==NULL if there is no more input at
// all (i.e. the video has reached end of file condition). This
// can be used to output delayed or otherwise remaining images.
int (*filter_ext)(struct vf_instance *vf, struct mp_image *mpi);
// Produce an output frame. This is called after filter or filter_ext.
// You can add 0 or more frames with vf_add_output_frame(). (This allows
// distributing the filter load over time -> typically add at most 1 frame.)
// If this adds no frame (or is NULL), then the caller assumes that the
// filter needs new input.
// Return a negative value on error. (No more frames is not an error.)
// May be called multiple times, even if the filter gives no output.
int (*filter_out)(struct vf_instance *vf);
// Optional function that checks whether the filter needs additional
// input. This is for filters with asynchronous behavior: they filter
// frames in the background, and to get good pipelining behavior, new
// data should be fed, even if the playback core doesn't need any yet.
bool (*needs_input)(struct vf_instance *vf);
void (*uninit)(struct vf_instance *vf);
char *label;
bool autoinserted;
struct mp_image_params fmt_in, fmt_out;
struct mp_image_pool *out_pool;
struct vf_priv_s *priv;
struct mp_log *log;
struct mp_hwdec_info *hwdec;
struct mp_image **out_queued;
int num_out_queued;
// Caches valid output formats.
uint8_t last_outfmts[IMGFMT_END - IMGFMT_START];
struct vf_chain *chain;
struct vf_instance *next;
} vf_instance_t;
// A chain of video filters
struct vf_chain {
int initialized; // 0: no, 1: yes, -1: attempted to, but failed
struct vf_instance *first, *last;
struct mp_image_params input_params;
struct mp_image_params output_params;
uint8_t allowed_output_formats[IMGFMT_END - IMGFMT_START];
double container_fps;
double display_fps;
struct mp_log *log;
struct MPOpts *opts;
struct mpv_global *global;
struct mp_hwdec_info *hwdec;
// Call when the filter chain wants new processing (for filters with
// asynchronous behavior) - must be immutable once filters are created,
// since they are supposed to call it from foreign threads.
void (*wakeup_callback)(void *ctx);
void *wakeup_callback_ctx;
};
typedef struct vf_seteq {
const char *item;
int value;
} vf_equalizer_t;
enum vf_ctrl {
VFCTRL_SEEK_RESET = 1, // reset on picture and PTS discontinuities
VFCTRL_SET_EQUALIZER, // set color options (brightness,contrast etc)
VFCTRL_GET_EQUALIZER, // get color options (brightness,contrast etc)
VFCTRL_SET_DEINTERLACE, // Set deinterlacing status
VFCTRL_GET_DEINTERLACE, // Get deinterlacing status
VFCTRL_GET_METADATA, // Get frame metadata from lavfi filters (e.g., cropdetect)
/* Hack to make the OSD state object available to vf_sub which
* access OSD/subtitle state outside of normal OSD draw time. */
VFCTRL_INIT_OSD,
VFCTRL_COMMAND,
};
struct vf_chain *vf_new(struct mpv_global *global);
void vf_destroy(struct vf_chain *c);
int vf_reconfig(struct vf_chain *c, const struct mp_image_params *params);
int vf_control_any(struct vf_chain *c, int cmd, void *arg);
int vf_control_by_label(struct vf_chain *c, int cmd, void *arg, bstr label);
int vf_filter_frame(struct vf_chain *c, struct mp_image *img);
int vf_output_frame(struct vf_chain *c, bool eof);
int vf_needs_input(struct vf_chain *c);
struct mp_image *vf_read_output_frame(struct vf_chain *c);
void vf_seek_reset(struct vf_chain *c);
struct vf_instance *vf_append_filter(struct vf_chain *c, const char *name,
char **args);
void vf_remove_filter(struct vf_chain *c, struct vf_instance *vf);
int vf_append_filter_list(struct vf_chain *c, struct m_obj_settings *list);
struct vf_instance *vf_find_by_label(struct vf_chain *c, const char *label);
void vf_print_filter_chain(struct vf_chain *c, int msglevel,
struct vf_instance *vf);
int vf_send_command(struct vf_chain *c, char *label, char *cmd, char *arg);
// Filter internal API
struct mp_image *vf_alloc_out_image(struct vf_instance *vf);
bool vf_make_out_image_writeable(struct vf_instance *vf, struct mp_image *img);
void vf_add_output_frame(struct vf_instance *vf, struct mp_image *img);
// default wrappers:
int vf_next_query_format(struct vf_instance *vf, unsigned int fmt);
#endif /* MPLAYER_VF_H */
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