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#ifndef MPLAYER_SD_H
#define MPLAYER_SD_H
#include "dec_sub.h"
#include "demux/packet.h"
#include "misc/bstr.h"
// up to 210 ms overlaps or gaps are removed
#define SUB_GAP_THRESHOLD 0.210
// don't change timings if durations are smaller
#define SUB_GAP_KEEP 0.4
// slight offset when sub seeking or sub stepping
#define SUB_SEEK_OFFSET 0.01
#define SUB_SEEK_WITHOUT_VIDEO_OFFSET 0.1
struct sd {
struct mpv_global *global;
struct mp_log *log;
struct mp_subtitle_opts *opts;
struct mp_subtitle_shared_opts *shared_opts;
const struct sd_functions *driver;
void *priv;
int order;
struct attachment_list *attachments;
struct mp_codec_params *codec;
// Set to false as soon as the decoder discards old subtitle events.
// (only needed if sd_functions.accept_packets_in_advance == false)
bool preload_ok;
};
struct sd_functions {
const char *name;
bool accept_packets_in_advance;
int (*init)(struct sd *sd);
void (*decode)(struct sd *sd, struct demux_packet *packet);
void (*reset)(struct sd *sd);
void (*select)(struct sd *sd, bool selected);
void (*uninit)(struct sd *sd);
bool (*accepts_packet)(struct sd *sd, double pts); // implicit default if NULL: true
int (*control)(struct sd *sd, enum sd_ctrl cmd, void *arg);
struct sub_bitmaps *(*get_bitmaps)(struct sd *sd, struct mp_osd_res dim,
int format, double pts);
char *(*get_text)(struct sd *sd, double pts, enum sd_text_type type);
struct sd_times (*get_times)(struct sd *sd, double pts);
};
// lavc_conv.c
struct lavc_conv;
struct lavc_conv *lavc_conv_create(struct mp_log *log,
const struct mp_codec_params *mp_codec);
char *lavc_conv_get_extradata(struct lavc_conv *priv);
char **lavc_conv_decode(struct lavc_conv *priv, struct demux_packet *packet,
double *sub_pts, double *sub_duration);
void lavc_conv_reset(struct lavc_conv *priv);
void lavc_conv_uninit(struct lavc_conv *priv);
struct sd_filter {
struct mpv_global *global;
struct mp_log *log;
struct mp_sub_filter_opts *opts;
const struct sd_filter_functions *driver;
void *priv;
// Static codec parameters. Set by sd; cannot be changed by filter.
char *codec;
char *event_format;
};
struct sd_filter_functions {
bool (*init)(struct sd_filter *ft);
// Filter an ASS event (usually in the Matroska format, but event_format
// can be used to determine details).
// Returning NULL is interpreted as dropping the event completely.
// Returning pkt makes it no-op.
// If the returned packet is not pkt or NULL, it must have been properly
// allocated.
// pkt is owned by the caller (and freed by the caller when needed).
// Note: as by normal demux_packet rules, you must not modify any fields in
// it, or the data referenced by it. You must create a new demux_packet
// when modifying data.
struct demux_packet *(*filter)(struct sd_filter *ft,
struct demux_packet *pkt);
void (*uninit)(struct sd_filter *ft);
};
extern const struct sd_filter_functions sd_filter_sdh;
extern const struct sd_filter_functions sd_filter_regex;
extern const struct sd_filter_functions sd_filter_jsre;
// convenience utils for filters with ass codec
// num commas to skip at an ass-event before the "Text" field (always last)
// (doesn't change, can be retrieved once on filter init)
int sd_ass_fmt_offset(const char *event_format);
// the event (pkt->buffer) "Text" content according to the calculated offset.
// on malformed event: warns and returns (bstr){NULL,0}
bstr sd_ass_pkt_text(struct sd_filter *ft, struct demux_packet *pkt, int offset);
// convert \0-terminated "Text" (ass) content to plaintext, possibly in-place.
// result.start is out, result.len is MIN(out_siz, strlen(in)) or smaller.
// if there's room: out[result.len] is set to \0. out == in is allowed.
bstr sd_ass_to_plaintext(char *out, size_t out_siz, const char *in);
#endif
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