mpv/demux/demux.h

310 lines
10 KiB
C

/*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPLAYER_DEMUXER_H
#define MPLAYER_DEMUXER_H
#include <sys/types.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include "bstr/bstr.h"
#include "common/common.h"
#include "packet.h"
#include "stheader.h"
struct MPOpts;
#define MAX_PACKS 4096
#define MAX_PACK_BYTES 0x8000000 // 128 MiB
enum demuxer_type {
DEMUXER_TYPE_GENERIC = 0,
DEMUXER_TYPE_TV,
DEMUXER_TYPE_MATROSKA,
DEMUXER_TYPE_EDL,
DEMUXER_TYPE_CUE,
};
// DEMUXER control commands/answers
#define DEMUXER_CTRL_NOTIMPL -1
#define DEMUXER_CTRL_DONTKNOW 0
#define DEMUXER_CTRL_OK 1
#define DEMUXER_CTRL_GUESS 2
enum demux_ctrl {
DEMUXER_CTRL_SWITCHED_TRACKS = 1,
DEMUXER_CTRL_GET_TIME_LENGTH,
DEMUXER_CTRL_GET_START_TIME,
DEMUXER_CTRL_RESYNC,
DEMUXER_CTRL_IDENTIFY_PROGRAM,
};
#define SEEK_ABSOLUTE (1 << 0)
#define SEEK_FACTOR (1 << 1)
#define SEEK_FORWARD (1 << 2)
#define SEEK_BACKWARD (1 << 3)
#define SEEK_SUBPREROLL (1 << 4)
// Strictness of the demuxer open format check.
// demux.c will try by default: NORMAL, UNSAFE (in this order)
// Using "-demuxer format" will try REQUEST
// Using "-demuxer +format" will try FORCE
// REQUEST can be used as special value for raw demuxers which have no file
// header check; then they should fail if check!=FORCE && check!=REQUEST.
//
// In general, the list is sorted from weakest check to normal check.
// You can use relation operators to compare the check level.
enum demux_check {
DEMUX_CHECK_FORCE, // force format if possible
DEMUX_CHECK_UNSAFE, // risky/fuzzy detection
DEMUX_CHECK_REQUEST,// requested by user or stream implementation
DEMUX_CHECK_NORMAL, // normal, safe detection
};
// demux_lavf can pass lavf buffers using FF_INPUT_BUFFER_PADDING_SIZE instead
#define MP_INPUT_BUFFER_PADDING_SIZE 16
#define MAX_SH_STREAMS 256
struct demuxer;
/**
* Demuxer description structure
*/
typedef struct demuxer_desc {
const char *name; // Demuxer name, used with -demuxer switch
const char *desc; // Displayed to user
enum demuxer_type type; // optional
// Return 0 on success, otherwise -1
int (*open)(struct demuxer *demuxer, enum demux_check check);
// The following functions are all optional
int (*fill_buffer)(struct demuxer *demuxer); // 0 on EOF, otherwise 1
void (*close)(struct demuxer *demuxer);
void (*seek)(struct demuxer *demuxer, float rel_seek_secs, int flags);
int (*control)(struct demuxer *demuxer, int cmd, void *arg);
} demuxer_desc_t;
struct mp_tags {
char **keys;
char **values;
int num_keys;
};
typedef struct demux_chapter
{
int original_index;
uint64_t start, end;
char *name;
struct mp_tags *metadata;
uint64_t demuxer_id; // for mapping to internal demuxer data structures
} demux_chapter_t;
struct demux_edition {
uint64_t demuxer_id;
bool default_edition;
struct mp_tags *metadata;
};
struct matroska_segment_uid {
unsigned char segment[16];
uint64_t edition;
};
struct matroska_data {
struct matroska_segment_uid uid;
// Ordered chapter information if any
struct matroska_chapter {
uint64_t start;
uint64_t end;
bool has_segment_uid;
struct matroska_segment_uid uid;
char *name;
} *ordered_chapters;
int num_ordered_chapters;
};
typedef struct demux_attachment
{
char *name;
char *type;
void *data;
unsigned int data_size;
} demux_attachment_t;
struct demuxer_params {
int matroska_num_wanted_uids;
struct matroska_segment_uid *matroska_wanted_uids;
int matroska_wanted_segment;
bool *matroska_was_valid;
struct ass_library *ass_library;
bool expect_subtitle;
};
typedef struct demuxer {
const demuxer_desc_t *desc; ///< Demuxer description structure
const char *filetype; // format name when not identified by demuxer (libavformat)
int64_t filepos; // input stream current pos.
struct stream *stream;
double stream_pts; // current stream pts, if applicable (e.g. dvd)
char *filename; // same as stream->url
enum demuxer_type type;
int seekable; // flag
/* Set if using absolute seeks for small movements is OK (no pts resets
* that would make pts ambigious, preferably supports back/forward flags */
bool accurate_seek;
// File format allows PTS resets (even if the current file is without)
bool ts_resets_possible;
bool warned_queue_overflow;
struct sh_stream **streams;
int num_streams;
bool stream_autoselect;
struct demux_edition *editions;
int num_editions;
int edition;
struct demux_chapter *chapters;
int num_chapters;
struct demux_attachment *attachments;
int num_attachments;
struct matroska_data matroska_data;
// for trivial demuxers which just read the whole file for codec to use
struct bstr file_contents;
// If the file is a playlist file
struct playlist *playlist;
struct mp_tags *metadata;
char *previous_metadata;
void *priv; // demuxer-specific internal data
struct MPOpts *opts;
struct mpv_global *global;
struct mp_log *log, *glog;
struct demuxer_params *params;
} demuxer_t;
typedef struct {
int progid; //program id
int aid, vid, sid; //audio, video and subtitle id
} demux_program_t;
struct demux_packet *new_demux_packet(size_t len);
// data must already have suitable padding
struct demux_packet *new_demux_packet_fromdata(void *data, size_t len);
struct demux_packet *new_demux_packet_from(void *data, size_t len);
void resize_demux_packet(struct demux_packet *dp, size_t len);
void free_demux_packet(struct demux_packet *dp);
struct demux_packet *demux_copy_packet(struct demux_packet *dp);
#ifndef SIZE_MAX
#define SIZE_MAX ((size_t)-1)
#endif
void free_demuxer(struct demuxer *demuxer);
int demuxer_add_packet(demuxer_t *demuxer, struct sh_stream *stream,
demux_packet_t *dp);
struct demux_packet *demux_read_packet(struct sh_stream *sh);
double demux_get_next_pts(struct sh_stream *sh);
bool demux_has_packet(struct sh_stream *sh);
bool demux_stream_eof(struct sh_stream *sh);
struct sh_stream *new_sh_stream(struct demuxer *demuxer, enum stream_type type);
struct demuxer *demux_open(struct stream *stream, char *force_format,
struct demuxer_params *params,
struct mpv_global *global);
void demux_flush(struct demuxer *demuxer);
int demux_seek(struct demuxer *demuxer, float rel_seek_secs, int flags);
char *demux_info_get(struct demuxer *demuxer, const char *opt);
bool demux_info_update(struct demuxer *demuxer);
int demux_control(struct demuxer *demuxer, int cmd, void *arg);
void demuxer_switch_track(struct demuxer *demuxer, enum stream_type type,
struct sh_stream *stream);
void demuxer_select_track(struct demuxer *demuxer, struct sh_stream *stream,
bool selected);
void demuxer_enable_autoselect(struct demuxer *demuxer);
void demuxer_help(struct mp_log *log);
int demuxer_add_attachment(struct demuxer *demuxer, struct bstr name,
struct bstr type, struct bstr data);
int demuxer_add_chapter(struct demuxer *demuxer, struct bstr name,
uint64_t start, uint64_t end, uint64_t demuxer_id);
int demuxer_seek_chapter(struct demuxer *demuxer, int chapter,
double *seek_pts);
void demuxer_sort_chapters(demuxer_t *demuxer);
double demuxer_get_time_length(struct demuxer *demuxer);
double demuxer_get_start_time(struct demuxer *demuxer);
/// Get current chapter index if available.
int demuxer_get_current_chapter(struct demuxer *demuxer, double time_now);
/// Get chapter name by index if available.
char *demuxer_chapter_name(struct demuxer *demuxer, int chapter);
/// Get chapter start time by index if available.
double demuxer_chapter_time(struct demuxer *demuxer, int chapter);
/// Get total chapter number.
int demuxer_chapter_count(struct demuxer *demuxer);
/// Get current angle index.
int demuxer_get_current_angle(struct demuxer *demuxer);
/// Set angle.
int demuxer_set_angle(struct demuxer *demuxer, int angle);
/// Get number of angles.
int demuxer_angles_count(struct demuxer *demuxer);
struct sh_stream *demuxer_stream_by_demuxer_id(struct demuxer *d,
enum stream_type t, int id);
bool demuxer_stream_is_selected(struct demuxer *d, struct sh_stream *stream);
bool demuxer_stream_has_packets_queued(struct demuxer *d, struct sh_stream *stream);
void demux_packet_list_sort(struct demux_packet **pkts, int num_pkts);
void demux_packet_list_seek(struct demux_packet **pkts, int num_pkts,
int *current, float rel_seek_secs, int flags);
double demux_packet_list_duration(struct demux_packet **pkts, int num_pkts);
struct demux_packet *demux_packet_list_fill(struct demux_packet **pkts,
int num_pkts, int *current);
void mp_tags_set_str(struct mp_tags *tags, const char *key, const char *value);
void mp_tags_set_bstr(struct mp_tags *tags, bstr key, bstr value);
char *mp_tags_get_str(struct mp_tags *tags, const char *key);
char *mp_tags_get_bstr(struct mp_tags *tags, bstr key);
void mp_tags_clear(struct mp_tags *tags);
bool demux_matroska_uid_cmp(struct matroska_segment_uid *a,
struct matroska_segment_uid *b);
const char *stream_type_name(enum stream_type type);
#endif /* MPLAYER_DEMUXER_H */