mpv/demux/demux.h

313 lines
10 KiB
C

/*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#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 "misc/bstr.h"
#include "common/common.h"
#include "common/tags.h"
#include "packet.h"
#include "stheader.h"
// Maximum total size of packets queued - if larger, no new packets are read,
// and the demuxer pretends EOF was reached.
#define MAX_PACKS 16000
#define MAX_PACK_BYTES (400 * 1024 * 1024)
// DEMUXER control commands/answers
#define DEMUXER_CTRL_NOTIMPL -1
#define DEMUXER_CTRL_DONTKNOW 0
#define DEMUXER_CTRL_OK 1
enum demux_ctrl {
DEMUXER_CTRL_SWITCHED_TRACKS = 1,
DEMUXER_CTRL_GET_TIME_LENGTH,
DEMUXER_CTRL_RESYNC,
DEMUXER_CTRL_IDENTIFY_PROGRAM,
DEMUXER_CTRL_STREAM_CTRL,
DEMUXER_CTRL_GET_READER_STATE,
DEMUXER_CTRL_GET_NAV_EVENT,
DEMUXER_CTRL_GET_BITRATE_STATS, // double[STREAM_TYPE_COUNT]
};
struct demux_ctrl_reader_state {
bool eof, underrun, idle;
double ts_range[2]; // start, end
double ts_duration;
};
struct demux_ctrl_stream_ctrl {
int ctrl;
void *arg;
int res;
};
#define SEEK_ABSOLUTE (1 << 0) // argument is a timestamp
#define SEEK_FACTOR (1 << 1) // argument is in range [0,1]
#define SEEK_FORWARD (1 << 2) // prefer later time if not exact
#define SEEK_BACKWARD (1 << 3) // prefer earlier time if not exact
#define SEEK_HR (1 << 5) // hr-seek (this is a weak hint only)
// 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
};
enum demux_event {
DEMUX_EVENT_INIT = 1 << 0, // complete (re-)initialization
DEMUX_EVENT_STREAMS = 1 << 1, // a stream was added
DEMUX_EVENT_METADATA = 1 << 2, // metadata or stream_metadata changed
DEMUX_EVENT_ALL = 0xFFFF,
};
#define MAX_SH_STREAMS 256
struct demuxer;
struct timeline;
/**
* Demuxer description structure
*/
typedef struct demuxer_desc {
const char *name; // Demuxer name, used with -demuxer switch
const char *desc; // Displayed to user
// 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, double rel_seek_secs, int flags);
int (*control)(struct demuxer *demuxer, int cmd, void *arg);
// See timeline.c
void (*load_timeline)(struct timeline *tl);
} demuxer_desc_t;
typedef struct demux_chapter
{
int original_index;
double pts;
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;
};
struct replaygain_data {
float track_gain;
float track_peak;
float album_gain;
float album_peak;
};
typedef struct demux_attachment
{
char *name;
char *type;
void *data;
unsigned int data_size;
} demux_attachment_t;
struct demuxer_params {
char *force_format;
int matroska_num_wanted_uids;
struct matroska_segment_uid *matroska_wanted_uids;
int matroska_wanted_segment;
bool *matroska_was_valid;
bool expect_subtitle;
bool disable_cache; // demux_open_url() only
};
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.
char *filename; // same as stream->url
bool seekable;
bool partially_seekable; // implies seekable=true
double start_time;
// File format allows PTS resets (even if the current file is without)
bool ts_resets_possible;
// Send relative seek requests, instead of SEEK_ABSOLUTE or SEEK_FACTOR.
// This is only done if the user explicitly uses a relative seek.
bool rel_seeks;
// Enable fast track switching hacks. This requires from the demuxer:
// - seeking is somewhat reliable; packet contents must not change
// - packet position (demux_packet.pos) is set, not negative, unique, and
// monotonically increasing
// - seeking leaves packet positions invariant
bool allow_refresh_seeks;
// The file data was fully read, and there is no need to keep the stream
// open, keep the cache active, or to run the demuxer thread. Generating
// packets is not slow either (unlike e.g. libavdevice pseudo-demuxers).
// Typical examples: text subtitles, playlists
bool fully_read;
// Bitmask of DEMUX_EVENT_*
int events;
struct sh_stream **streams;
int num_streams;
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;
// If the file is a playlist file
struct playlist *playlist;
struct mp_tags *metadata;
void *priv; // demuxer-specific internal data
struct MPOpts *opts;
struct mpv_global *global;
struct mp_log *log, *glog;
struct demuxer_params *params;
struct demux_internal *in; // internal to demux.c
// Since the demuxer can run in its own thread, and the stream is not
// thread-safe, only the demuxer is allowed to access the stream directly.
// You can freely use demux_stream_control() to send STREAM_CTRLs, or use
// demux_pause() to get exclusive access to the stream.
struct stream *stream;
} demuxer_t;
typedef struct {
int progid; //program id
int aid, vid, sid; //audio, video and subtitle id
} demux_program_t;
void free_demuxer(struct demuxer *demuxer);
void free_demuxer_and_stream(struct demuxer *demuxer);
int demux_add_packet(struct sh_stream *stream, demux_packet_t *dp);
struct demux_packet *demux_read_packet(struct sh_stream *sh);
int demux_read_packet_async(struct sh_stream *sh, struct demux_packet **out_pkt);
bool demux_stream_is_selected(struct sh_stream *stream);
double demux_get_next_pts(struct sh_stream *sh);
bool demux_has_packet(struct sh_stream *sh);
struct demux_packet *demux_read_any_packet(struct demuxer *demuxer);
struct sh_stream *new_sh_stream(struct demuxer *demuxer, enum stream_type type);
struct demuxer *demux_open(struct stream *stream, struct demuxer_params *params,
struct mpv_global *global);
struct mp_cancel;
struct demuxer *demux_open_url(const char *url,
struct demuxer_params *params,
struct mp_cancel *cancel,
struct mpv_global *global);
void demux_start_thread(struct demuxer *demuxer);
void demux_stop_thread(struct demuxer *demuxer);
void demux_set_wakeup_cb(struct demuxer *demuxer, void (*cb)(void *ctx), void *ctx);
bool demux_cancel_test(struct demuxer *demuxer);
void demux_flush(struct demuxer *demuxer);
int demux_seek(struct demuxer *demuxer, double rel_seek_secs, int flags);
void demux_set_enable_refresh_seeks(struct demuxer *demuxer, bool enabled);
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 demux_set_stream_autoselect(struct demuxer *demuxer, bool autoselect);
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(demuxer_t *demuxer, struct bstr name,
double pts, uint64_t demuxer_id);
double demuxer_get_time_length(struct demuxer *demuxer);
int demux_stream_control(demuxer_t *demuxer, int ctrl, void *arg);
void demux_pause(demuxer_t *demuxer);
void demux_unpause(demuxer_t *demuxer);
void demux_changed(demuxer_t *demuxer, int events);
void demux_update(demuxer_t *demuxer);
struct sh_stream *demuxer_stream_by_demuxer_id(struct demuxer *d,
enum stream_type t, int id);
struct demux_chapter *demux_copy_chapter_data(struct demux_chapter *c, int num);
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 */