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mpv/sub/sd.h
wm4 385febe276 sub: protect ASS_Renderer state
Each subtitle track gets its own decoder instance (sd_ass). But they use
a shared ASS_Renderer. This is done mainly because of fontconfig.
Initializing fontconfig is very slow when using it with memory fonts, so
there's a practical need to cache this memory font state, which is done
by not creating separate ASS_Renderers. This is very dirty and very
evil, but we probably can't get rid of it any time soon.

The shared ASS_Renderer was not properly synchronized. While the program
logic guarantees that only one sd_ass instance is visible at a time,
there are other interactions that require synchronization. In
particular, I suspect concurrent execution of mp_ass_configure_fonts()
and sd_ass.get_bitmaps cause issues in a newer libass development
branch.

So here's a shitty hack that hopefully fixes things, hopefully only
until libass becomes less dependent on fontconfig.
2015-07-06 21:55:37 +02:00

76 lines
2.1 KiB
C

#ifndef MPLAYER_SD_H
#define MPLAYER_SD_H
#include "dec_sub.h"
#include "demux/packet.h"
struct sd {
struct mp_log *log;
struct MPOpts *opts;
const struct sd_functions *driver;
void *priv;
const char *codec;
// Extra header data passed from demuxer
char *extradata;
int extradata_len;
// Set to !=NULL if the input packets are being converted from another
// format.
const char *converted_from;
// Video resolution used for subtitle decoding. Doesn't necessarily match
// the resolution of the VO, nor does it have to be the OSD resolution.
int sub_video_w, sub_video_h;
// Shared renderer for ASS - done to avoid reloading embedded fonts.
struct ass_library *ass_library;
struct ass_renderer *ass_renderer;
pthread_mutex_t *ass_lock;
// If false, try to remove multiple subtitles.
// (Only for decoders which have accept_packets_in_advance set.)
bool no_remove_duplicates;
// Set by sub converter
const char *output_codec;
char *output_extradata;
int output_extradata_len;
// Internal buffer for sd_conv_* functions
struct sd_conv_buffer *sd_conv_buffer;
};
struct sd_functions {
const char *name;
bool accept_packets_in_advance;
bool (*supports_format)(const char *format);
int (*init)(struct sd *sd);
void (*decode)(struct sd *sd, struct demux_packet *packet);
void (*reset)(struct sd *sd);
void (*uninit)(struct sd *sd);
void (*fix_events)(struct sd *sd);
int (*control)(struct sd *sd, enum sd_ctrl cmd, void *arg);
// decoder
void (*get_bitmaps)(struct sd *sd, struct mp_osd_res dim, double pts,
struct sub_bitmaps *res);
char *(*get_text)(struct sd *sd, double pts);
// converter
struct demux_packet *(*get_converted)(struct sd *sd);
};
void sd_conv_add_packet(struct sd *sd, void *data, int data_len, double pts,
double duration);
struct demux_packet *sd_conv_def_get_converted(struct sd *sd);
void sd_conv_def_reset(struct sd *sd);
void sd_conv_def_uninit(struct sd *sd);
#define SD_MAX_LINE_LEN 1000
#endif