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https://github.com/mpv-player/mpv
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e20b645611
This way we receive such minor details as the profile (necessary for ARIB captions, among others) during init. This enables decoders to switch between ARIB caption profile A and profile C streams.
110 lines
3.8 KiB
C
110 lines
3.8 KiB
C
#ifndef MPLAYER_SD_H
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#define MPLAYER_SD_H
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#include "dec_sub.h"
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#include "demux/packet.h"
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#include "misc/bstr.h"
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// up to 210 ms overlaps or gaps are removed
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#define SUB_GAP_THRESHOLD 0.210
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// don't change timings if durations are smaller
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#define SUB_GAP_KEEP 0.4
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struct sd {
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struct mpv_global *global;
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struct mp_log *log;
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struct mp_subtitle_opts *opts;
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const struct sd_functions *driver;
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void *priv;
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struct attachment_list *attachments;
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struct mp_codec_params *codec;
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// Set to false as soon as the decoder discards old subtitle events.
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// (only needed if sd_functions.accept_packets_in_advance == false)
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bool preload_ok;
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};
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struct sd_functions {
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const char *name;
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bool accept_packets_in_advance;
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int (*init)(struct sd *sd);
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void (*decode)(struct sd *sd, struct demux_packet *packet);
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void (*reset)(struct sd *sd);
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void (*select)(struct sd *sd, bool selected);
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void (*uninit)(struct sd *sd);
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bool (*accepts_packet)(struct sd *sd, double pts); // implicit default if NULL: true
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int (*control)(struct sd *sd, enum sd_ctrl cmd, void *arg);
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struct sub_bitmaps *(*get_bitmaps)(struct sd *sd, struct mp_osd_res dim,
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int format, double pts);
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char *(*get_text)(struct sd *sd, double pts, enum sd_text_type type);
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struct sd_times (*get_times)(struct sd *sd, double pts);
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};
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// lavc_conv.c
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struct lavc_conv;
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struct lavc_conv *lavc_conv_create(struct mp_log *log,
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const struct mp_codec_params *mp_codec);
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char *lavc_conv_get_extradata(struct lavc_conv *priv);
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char **lavc_conv_decode(struct lavc_conv *priv, struct demux_packet *packet,
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double *sub_pts, double *sub_duration);
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void lavc_conv_reset(struct lavc_conv *priv);
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void lavc_conv_uninit(struct lavc_conv *priv);
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struct sd_filter {
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struct mpv_global *global;
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struct mp_log *log;
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struct mp_sub_filter_opts *opts;
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const struct sd_filter_functions *driver;
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void *priv;
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// Static codec parameters. Set by sd; cannot be changed by filter.
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char *codec;
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char *event_format;
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};
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struct sd_filter_functions {
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bool (*init)(struct sd_filter *ft);
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// Filter an ASS event (usually in the Matroska format, but event_format
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// can be used to determine details).
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// Returning NULL is interpreted as dropping the event completely.
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// Returning pkt makes it no-op.
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// If the returned packet is not pkt or NULL, it must have been properly
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// allocated.
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// pkt is owned by the caller (and freed by the caller when needed).
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// Note: as by normal demux_packet rules, you must not modify any fields in
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// it, or the data referenced by it. You must create a new demux_packet
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// when modifying data.
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struct demux_packet *(*filter)(struct sd_filter *ft,
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struct demux_packet *pkt);
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void (*uninit)(struct sd_filter *ft);
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};
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extern const struct sd_filter_functions sd_filter_sdh;
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extern const struct sd_filter_functions sd_filter_regex;
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extern const struct sd_filter_functions sd_filter_jsre;
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// convenience utils for filters with ass codec
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// num commas to skip at an ass-event before the "Text" field (always last)
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// (doesn't change, can be retrieved once on filter init)
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int sd_ass_fmt_offset(const char *event_format);
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// the event (pkt->buffer) "Text" content according to the calculated offset.
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// on malformed event: warns and returns (bstr){NULL,0}
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bstr sd_ass_pkt_text(struct sd_filter *ft, struct demux_packet *pkt, int offset);
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// convert \0-terminated "Text" (ass) content to plaintext, possibly in-place.
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// result.start is out, result.len is MIN(out_siz, strlen(in)) or smaller.
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// if there's room: out[result.len] is set to \0. out == in is allowed.
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bstr sd_ass_to_plaintext(char *out, size_t out_siz, const char *in);
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#endif
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