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🎥 Command line media player
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C
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#ifndef MPLAYER_EBML_H#define MPLAYER_EBML_H
#include <inttypes.h>#include <stddef.h>#include <stdbool.h>
#include "stream/stream.h"#include "misc/bstr.h"
struct mp_log;
/* EBML version supported */#define EBML_VERSION 1
enum ebml_elemtype { EBML_TYPE_SUBELEMENTS, EBML_TYPE_UINT, EBML_TYPE_SINT, EBML_TYPE_FLOAT, EBML_TYPE_STR, EBML_TYPE_BINARY, EBML_TYPE_EBML_ID,};
struct ebml_field_desc { uint32_t id; bool multiple; int offset; int count_offset; const struct ebml_elem_desc *desc;};
struct ebml_elem_desc { char *name; enum ebml_elemtype type; int size; int field_count; const struct ebml_field_desc *fields;};
struct ebml_parse_ctx { struct mp_log *log; void *talloc_ctx; bool has_errors; bool no_error_messages;};
#include "ebml_types.h"
#define EBML_ID_INVALID 0xffffffff
/* matroska track types */#define MATROSKA_TRACK_VIDEO 0x01 /* rectangle-shaped pictures aka video */#define MATROSKA_TRACK_AUDIO 0x02 /* anything you can hear */#define MATROSKA_TRACK_COMPLEX 0x03 /* audio+video in same track used by DV */#define MATROSKA_TRACK_LOGO 0x10 /* overlay-pictures displayed over video*/#define MATROSKA_TRACK_SUBTITLE 0x11 /* text-subtitles */#define MATROSKA_TRACK_CONTROL 0x20 /* control-codes for menu or other stuff*/
#define EBML_UINT_INVALID UINT64_MAX#define EBML_INT_INVALID INT64_MAX
/* Block Addition Mappings */#define MATROSKA_BLOCK_ADD_ID_TYPE_ITU_T_T35 4
bool ebml_is_mkv_level1_id(uint32_t id);uint32_t ebml_read_id (stream_t *s);uint64_t ebml_read_length (stream_t *s);int64_t ebml_read_signed_length(stream_t *s);uint64_t ebml_read_uint (stream_t *s);int64_t ebml_read_int (stream_t *s);int ebml_read_skip(struct mp_log *log, int64_t end, stream_t *s);int ebml_resync_cluster(struct mp_log *log, stream_t *s);
int ebml_read_element(struct stream *s, struct ebml_parse_ctx *ctx, void *target, const struct ebml_elem_desc *desc);
#endif /* MPLAYER_EBML_H */