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mpv/demux/demux.h

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/*
* 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 "core/bstr.h"
#include "core/mp_common.h"
#include "demux_packet.h"
#include "stheader.h"
struct MPOpts;
#ifdef HAVE_BUILTIN_EXPECT
#define likely(x) __builtin_expect((x) != 0, 1)
#define unlikely(x) __builtin_expect((x) != 0, 0)
#else
#define likely(x) (x)
#define unlikely(x) (x)
#endif
#define MAX_PACKS 4096
#define MAX_PACK_BYTES 0x8000000 // 128 MiB
enum demuxer_type {
DEMUXER_TYPE_UNKNOWN = 0,
DEMUXER_TYPE_MPEG_PS,
DEMUXER_TYPE_AVI,
DEMUXER_TYPE_AVI_NI,
DEMUXER_TYPE_AVI_NINI,
DEMUXER_TYPE_ASF,
DEMUXER_TYPE_TV,
DEMUXER_TYPE_Y4M,
DEMUXER_TYPE_MF,
DEMUXER_TYPE_RAWAUDIO,
DEMUXER_TYPE_RAWVIDEO,
DEMUXER_TYPE_MPEG_ES,
DEMUXER_TYPE_MPEG4_ES,
DEMUXER_TYPE_H264_ES,
DEMUXER_TYPE_MPEG_PES,
DEMUXER_TYPE_MPEG_GXF,
DEMUXER_TYPE_GIF,
DEMUXER_TYPE_MPEG_TS,
DEMUXER_TYPE_MATROSKA,
DEMUXER_TYPE_LAVF,
DEMUXER_TYPE_NSV,
DEMUXER_TYPE_AVS,
DEMUXER_TYPE_AAC,
DEMUXER_TYPE_MPC,
DEMUXER_TYPE_LAVF_PREFERRED,
DEMUXER_TYPE_MNG,
DEMUXER_TYPE_EDL,
DEMUXER_TYPE_CUE,
/* Values after this are for internal use and can not be selected
* as demuxer type by the user (-demuxer option). */
DEMUXER_TYPE_END,
DEMUXER_TYPE_PLAYLIST,
};
enum timestamp_type {
TIMESTAMP_TYPE_PTS,
TIMESTAMP_TYPE_SORT,
};
// DEMUXER control commands/answers
#define DEMUXER_CTRL_NOTIMPL -1
#define DEMUXER_CTRL_DONTKNOW 0
#define DEMUXER_CTRL_OK 1
#define DEMUXER_CTRL_GUESS 2
#define DEMUXER_CTRL_GET_TIME_LENGTH 10
#define DEMUXER_CTRL_GET_PERCENT_POS 11
#define DEMUXER_CTRL_SWITCH_AUDIO 12
#define DEMUXER_CTRL_RESYNC 13
#define DEMUXER_CTRL_SWITCH_VIDEO 14
#define DEMUXER_CTRL_IDENTIFY_PROGRAM 15
#define DEMUXER_CTRL_CORRECT_PTS 16
#define DEMUXER_CTRL_AUTOSELECT_SUBTITLE 17
#define SEEK_ABSOLUTE (1 << 0)
#define SEEK_FACTOR (1 << 1)
#define SEEK_FORWARD (1 << 2)
#define SEEK_BACKWARD (1 << 3)
// demux_lavf can pass lavf buffers using FF_INPUT_BUFFER_PADDING_SIZE instead
#define MP_INPUT_BUFFER_PADDING_SIZE 16
typedef struct demux_stream {
enum stream_type stream_type;
int buffer_pos; // current buffer position
int buffer_size; // current buffer size
unsigned char *buffer; // current buffer, never free() it, always use free_demux_packet(buffer_ref);
double pts; // current buffer's pts
int pts_bytes; // number of bytes read after last pts stamp
int eof; // end of demuxed stream? (true if all buffer empty)
off_t pos; // position in the input stream (file)
off_t dpos; // position in the demuxed stream
int pack_no; // serial number of packet
bool keyframe; // keyframe flag of current packet
//---------------
int packs; // number of packets in buffer
int bytes; // total bytes of packets in buffer
demux_packet_t *first; // read to current buffer from here
demux_packet_t *last; // append new packets from input stream to here
demux_packet_t *current; // needed for refcounting of the buffer
int id; // stream ID (for multiple audio/video streams)
struct demuxer *demuxer; // parent demuxer structure (stream handler)
// ---- asf -----
struct demux_packet *asf_packet; // read asf fragments here
int asf_seq;
// ---- mov -----
unsigned int ss_mul, ss_div;
// ---- stream header ----
void *sh; // points to sh_audio or sh_video
} demux_stream_t;
typedef struct demuxer_info {
char *name;
char *author;
char *encoder;
char *comments;
char *copyright;
} demuxer_info_t;
#define MAX_SH_STREAMS 256
#define MAX_A_STREAMS MAX_SH_STREAMS
#define MAX_V_STREAMS MAX_SH_STREAMS
#define MAX_S_STREAMS MAX_SH_STREAMS
struct demuxer;
/**
* Demuxer description structure
*/
typedef struct demuxer_desc {
const char *info; // What is it (long name and/or description)
const char *name; // Demuxer name, used with -demuxer switch
const char *shortdesc; // Description printed at demuxer detection
const char *author; // Demuxer author(s)
const char *comment; // Comment, printed with -demuxer help
enum demuxer_type type;
// If 1 detection is safe and fast, do it before file extension check
int safe_check;
// Check if can demux the file, return DEMUXER_TYPE_xxx on success
// Mandatory if safe_check == 1, else optional
int (*check_file)(struct demuxer *demuxer);
/// Get packets from file, return 0 on eof. Mandatory
int (*fill_buffer)(struct demuxer *demuxer, struct demux_stream *ds);
/// Open the demuxer, return demuxer on success, NULL on failure
struct demuxer *(*open)(struct demuxer *demuxer); // Optional
/// Close the demuxer
void (*close)(struct demuxer *demuxer); // Optional
// Seek. Optional
void (*seek)(struct demuxer *demuxer, float rel_seek_secs,
float audio_delay, int flags);
// Various control functions. Optional
int (*control)(struct demuxer *demuxer, int cmd, void *arg);
} demuxer_desc_t;
typedef struct demux_chapter
{
uint64_t start, end;
char *name;
} demux_chapter_t;
struct matroska_data {
unsigned char segment_uid[16];
// Ordered chapter information if any
struct matroska_chapter {
uint64_t start;
uint64_t end;
bool has_segment_uid;
unsigned char segment_uid[16];
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 {
unsigned char (*matroska_wanted_uids)[16];
};
typedef struct demuxer {
const demuxer_desc_t *desc; ///< Demuxer description structure
const char *filetype; // format name when not identified by demuxer (libavformat)
off_t filepos; // input stream current pos.
off_t movi_start;
off_t movi_end;
struct stream *stream;
double stream_pts; // current stream pts, if applicable (e.g. dvd)
double reference_clock;
char *filename; // Needed by avs_check_file
int synced; // stream synced (used by mpeg)
enum demuxer_type type;
/* Normally the file_format field is just a copy of the type field above.
* There are 2 exceptions I noticed. Internal demux_avi may force
* ->type to DEMUXER_TYPE_AVI_[NI|NINI] while leaving ->file_format at
* DEMUXER_TYPE_AVI. Internal demux_mov may set ->type to
* DEMUXER_TYPE_PLAYLIST and also return that from the check function
* or not (looks potentially buggy). */
enum demuxer_type file_format;
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;
enum timestamp_type timestamp_type;
struct demux_stream *ds[STREAM_TYPE_COUNT]; // video/audio/sub buffers
// These correspond to ds[], e.g.: audio == ds[STREAM_AUDIO]
struct demux_stream *audio; // audio buffer/demuxer
struct demux_stream *video; // video buffer/demuxer
struct demux_stream *sub; // dvd subtitle buffer/demuxer
// stream headers:
struct sh_audio *a_streams[MAX_SH_STREAMS];
struct sh_video *v_streams[MAX_SH_STREAMS];
struct sh_sub *s_streams[MAX_SH_STREAMS];
struct sh_stream **streams;
int num_streams;
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;
void *priv; // demuxer-specific internal data
char **info; // metadata
struct MPOpts *opts;
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);
void resize_demux_packet(struct demux_packet *dp, size_t len);
struct demux_packet *clone_demux_packet(struct demux_packet *pack);
void free_demux_packet(struct demux_packet *dp);
#ifndef SIZE_MAX
#define SIZE_MAX ((size_t)-1)
#endif
static inline void *realloc_struct(void *ptr, size_t nmemb, size_t size)
{
if (nmemb > SIZE_MAX / size) {
free(ptr);
return NULL;
}
return realloc(ptr, nmemb * size);
}
struct demuxer *new_demuxer(struct MPOpts *opts, struct stream *stream,
int type, int a_id, int v_id, int s_id,
char *filename);
void free_demuxer(struct demuxer *demuxer);
struct sh_stream *ds_gsh(struct demux_stream *ds);
void ds_add_packet(struct demux_stream *ds, struct demux_packet *dp);
void ds_read_packet(struct demux_stream *ds, struct stream *stream, int len,
double pts, off_t pos, bool keyframe);
int demux_fill_buffer(struct demuxer *demux, struct demux_stream *ds);
int ds_fill_buffer(struct demux_stream *ds);
static inline off_t ds_tell(struct demux_stream *ds)
{
return (ds->dpos - ds->buffer_size) + ds->buffer_pos;
}
static inline int ds_tell_pts(struct demux_stream *ds)
{
return (ds->pts_bytes - ds->buffer_size) + ds->buffer_pos;
}
int demux_read_data(struct demux_stream *ds, unsigned char *mem, int len);
int demux_pattern_3(struct demux_stream *ds, unsigned char *mem, int maxlen,
int *read, uint32_t pattern);
#define demux_peekc(ds) ( \
(likely(ds->buffer_pos<ds->buffer_size)) ? ds->buffer[ds->buffer_pos] \
: ((unlikely(!ds_fill_buffer(ds))) ? (-1) : ds->buffer[ds->buffer_pos]))
#define demux_getc(ds) ( \
(likely(ds->buffer_pos<ds->buffer_size)) ? ds->buffer[ds->buffer_pos++] \
: ((unlikely(!ds_fill_buffer(ds))) ? (-1) : ds->buffer[ds->buffer_pos++]))
void ds_free_packs(struct demux_stream *ds);
int ds_get_packet(struct demux_stream *ds, unsigned char **start);
int ds_get_packet_pts(struct demux_stream *ds, unsigned char **start,
double *pts);
int ds_get_packet_sub(struct demux_stream *ds, unsigned char **start);
struct demux_packet *ds_get_packet2(struct demux_stream *ds, bool repeat_last);
double ds_get_next_pts(struct demux_stream *ds);
int ds_parse(struct demux_stream *sh, uint8_t **buffer, int *len, double pts,
off_t pos);
void ds_clear_parser(struct demux_stream *sh);
static inline int avi_stream_id(unsigned int id)
{
unsigned char a, b;
a = id - '0';
b = (id >> 8) - '0';
if (a>9 || b>9)
return 100; // invalid ID
return a * 10 + b;
}
struct demuxer *demux_open(struct MPOpts *opts, struct stream *stream,
int file_format, int aid, int vid, int sid,
char *filename);
struct demuxer *demux_open_withparams(struct MPOpts *opts,
struct stream *stream, int file_format,
char *force_format, int audio_id,
int video_id, int sub_id, char *filename,
struct demuxer_params *params);
void demux_flush(struct demuxer *demuxer);
int demux_seek(struct demuxer *demuxer, float rel_seek_secs, float audio_delay,
int flags);
// AVI demuxer params:
extern int index_mode; // -1=untouched 0=don't use index 1=use (generate) index
extern int force_ni;
extern int pts_from_bps;
int demux_info_add(struct demuxer *demuxer, const char *opt, const char *param);
int demux_info_add_bstr(struct demuxer *demuxer, struct bstr opt,
struct bstr param);
char *demux_info_get(struct demuxer *demuxer, const char *opt);
int demux_info_print(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);
int demuxer_type_by_filename(char *filename);
void demuxer_help(void);
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);
int demuxer_seek_chapter(struct demuxer *demuxer, int chapter,
double *seek_pts);
/// 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 and end time by index if available.
float demuxer_chapter_time(struct demuxer *demuxer, int chapter, float *end);
/// 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);
#endif /* MPLAYER_DEMUXER_H */
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