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mpv/libmpdemux/demuxer.h
reimar ca2af2d0e7 Add support for parsing audio streams (though should be easy to extend to video) 
via libavcodec.
Parsing can be done at the demuxer stage (currently disabled) or at the decoder
(ad_ffmpeg, enabled).
Should allow using the libavcodec AAC, DTS, ... decoders independent of container
format.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@30130 b3059339-0415-0410-9bf9-f77b7e298cf2
2009-12-27 15:28:01 +00:00

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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 "stream/stream.h"
#ifdef CONFIG_ASS
#include "libass/ass_mp.h"
#endif
#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 0x2000000
#define DEMUXER_TYPE_UNKNOWN 0
#define DEMUXER_TYPE_MPEG_ES 1
#define DEMUXER_TYPE_MPEG_PS 2
#define DEMUXER_TYPE_AVI 3
#define DEMUXER_TYPE_AVI_NI 4
#define DEMUXER_TYPE_AVI_NINI 5
#define DEMUXER_TYPE_ASF 6
#define DEMUXER_TYPE_MOV 7
#define DEMUXER_TYPE_VIVO 8
#define DEMUXER_TYPE_TV 9
#define DEMUXER_TYPE_FLI 10
#define DEMUXER_TYPE_REAL 11
#define DEMUXER_TYPE_Y4M 12
#define DEMUXER_TYPE_FILM 14
#define DEMUXER_TYPE_ROQ 15
#define DEMUXER_TYPE_MF 16
#define DEMUXER_TYPE_AUDIO 17
#define DEMUXER_TYPE_OGG 18
#define DEMUXER_TYPE_RAWAUDIO 20
#define DEMUXER_TYPE_RTP 21
#define DEMUXER_TYPE_RAWDV 22
#define DEMUXER_TYPE_PVA 23
#define DEMUXER_TYPE_SMJPEG 24
#define DEMUXER_TYPE_XMMS 25
#define DEMUXER_TYPE_RAWVIDEO 26
#define DEMUXER_TYPE_MPEG4_ES 27
#define DEMUXER_TYPE_GIF 28
#define DEMUXER_TYPE_MPEG_TS 29
#define DEMUXER_TYPE_H264_ES 30
#define DEMUXER_TYPE_MATROSKA 31
#define DEMUXER_TYPE_REALAUDIO 32
#define DEMUXER_TYPE_MPEG_TY 33
#define DEMUXER_TYPE_LMLM4 34
#define DEMUXER_TYPE_LAVF 35
#define DEMUXER_TYPE_NSV 36
#define DEMUXER_TYPE_VQF 37
#define DEMUXER_TYPE_AVS 38
#define DEMUXER_TYPE_AAC 39
#define DEMUXER_TYPE_MPC 40
#define DEMUXER_TYPE_MPEG_PES 41
#define DEMUXER_TYPE_MPEG_GXF 42
#define DEMUXER_TYPE_NUT 43
#define DEMUXER_TYPE_LAVF_PREFERRED 44
#define DEMUXER_TYPE_RTP_NEMESI 45
#define DEMUXER_TYPE_MNG 46
// This should always match the higest demuxer type number.
// Unless you want to disallow users to force the demuxer to some types
#define DEMUXER_TYPE_MIN 0
#define DEMUXER_TYPE_MAX 46
#define DEMUXER_TYPE_DEMUXERS (1<<16)
// A virtual demuxer type for the network code
#define DEMUXER_TYPE_PLAYLIST (2<<16)
#define MP_NOPTS_VALUE (-1LL<<63) //both int64_t and double should be able to represent this exactly
// 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 SEEK_ABSOLUTE (1 << 0)
#define SEEK_FACTOR (1 << 1)
#define MP_INPUT_BUFFER_PADDING_SIZE 8
// Holds one packet/frame/whatever
typedef struct demux_packet_st {
int len;
double pts;
double endpts;
double stream_pts;
off_t pos; // position in index (AVI) or file (MPG)
unsigned char* buffer;
int flags; // keyframe, etc
int refcount; //refcounter for the master packet, if 0, buffer can be free()d
struct demux_packet_st* master; //pointer to the master packet if this one is a cloned one
struct demux_packet_st* next;
} demux_packet_t;
typedef struct {
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
int flags; // flags of current packet (keyframe etc)
int non_interleaved; // 1 if this stream is not properly interleaved,
// so e.g. subtitle handling must do explicit reads.
//---------------
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_st *demuxer; // parent demuxer structure (stream handler)
// ---- asf -----
demux_packet_t *asf_packet; // read asf fragments here
int asf_seq;
// ---- mov -----
unsigned int ss_mul,ss_div;
// ---- stream header ----
void* sh;
} demux_stream_t;
typedef struct demuxer_info_st {
char *name;
char *author;
char *encoder;
char *comments;
char *copyright;
} demuxer_info_t;
#define MAX_A_STREAMS 256
#define MAX_V_STREAMS 256
#define MAX_S_STREAMS 256
struct demuxer_st;
extern int correct_pts;
extern int user_correct_pts;
/**
* Demuxer description structure
*/
typedef struct demuxers_desc_st {
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
int type; ///< DEMUXER_TYPE_xxx
int safe_check; ///< If 1 detection is safe and fast, do it before file extension check
/// Check if can demux the file, return DEMUXER_TYPE_xxx on success
int (*check_file)(struct demuxer_st *demuxer); ///< Mandatory if safe_check == 1, else optional
/// Get packets from file, return 0 on eof
int (*fill_buffer)(struct demuxer_st *demuxer, demux_stream_t *ds); ///< Mandatory
/// Open the demuxer, return demuxer on success, NULL on failure
struct demuxer_st* (*open)(struct demuxer_st *demuxer); ///< Optional
/// Close the demuxer
void (*close)(struct demuxer_st *demuxer); ///< Optional
// Seek
void (*seek)(struct demuxer_st *demuxer, float rel_seek_secs, float audio_delay, int flags); ///< Optional
// Control
int (*control)(struct demuxer_st *demuxer, int cmd, void *arg); ///< Optional
} demuxer_desc_t;
typedef struct demux_chapter_s
{
uint64_t start, end;
char* name;
} demux_chapter_t;
typedef struct demux_attachment_s
{
char* name;
char* type;
void* data;
unsigned int data_size;
} demux_attachment_t;
typedef struct demuxer_st {
const demuxer_desc_t *desc; ///< Demuxer description structure
off_t filepos; // input stream current pos.
off_t movi_start;
off_t movi_end;
stream_t *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)
int type; // demuxer type: mpeg PS, mpeg ES, avi, avi-ni, avi-nini, asf
int file_format; // file format: mpeg/avi/asf
int seekable; // flag
//
demux_stream_t *audio; // audio buffer/demuxer
demux_stream_t *video; // video buffer/demuxer
demux_stream_t *sub; // dvd subtitle buffer/demuxer
// stream headers:
void* a_streams[MAX_A_STREAMS]; // audio streams (sh_audio_t)
void* v_streams[MAX_V_STREAMS]; // video sterams (sh_video_t)
void *s_streams[MAX_S_STREAMS]; // dvd subtitles (flag)
// pointer to teletext decoder private data, if demuxer stream contains teletext
void *teletext;
demux_chapter_t* chapters;
int num_chapters;
demux_attachment_t* attachments;
int num_attachments;
void* priv; // fileformat-dependent data
char** info;
} demuxer_t;
typedef struct {
int progid; //program id
int aid, vid, sid; //audio, video and subtitle id
} demux_program_t;
static inline demux_packet_t* new_demux_packet(int len){
demux_packet_t* dp=(demux_packet_t*)malloc(sizeof(demux_packet_t));
dp->len=len;
dp->next=NULL;
dp->pts=MP_NOPTS_VALUE;
dp->endpts=MP_NOPTS_VALUE;
dp->stream_pts = MP_NOPTS_VALUE;
dp->pos=0;
dp->flags=0;
dp->refcount=1;
dp->master=NULL;
dp->buffer=NULL;
if (len > 0 && (dp->buffer = (unsigned char *)malloc(len + MP_INPUT_BUFFER_PADDING_SIZE)))
memset(dp->buffer + len, 0, 8);
else
dp->len = 0;
return dp;
}
static inline void resize_demux_packet(demux_packet_t* dp, int len)
{
if(len > 0)
{
dp->buffer=(unsigned char *)realloc(dp->buffer,len+8);
}
else
{
if(dp->buffer) free(dp->buffer);
dp->buffer=NULL;
}
dp->len=len;
if (dp->buffer)
memset(dp->buffer + len, 0, 8);
else
dp->len = 0;
}
static inline demux_packet_t* clone_demux_packet(demux_packet_t* pack){
demux_packet_t* dp=(demux_packet_t*)malloc(sizeof(demux_packet_t));
while(pack->master) pack=pack->master; // find the master
memcpy(dp,pack,sizeof(demux_packet_t));
dp->next=NULL;
dp->refcount=0;
dp->master=pack;
pack->refcount++;
return dp;
}
static inline void free_demux_packet(demux_packet_t* dp){
if (dp->master==NULL){ //dp is a master packet
dp->refcount--;
if (dp->refcount==0){
if (dp->buffer) free(dp->buffer);
free(dp);
}
return;
}
// dp is a clone:
free_demux_packet(dp->master);
free(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);
}
demux_stream_t* new_demuxer_stream(struct demuxer_st *demuxer,int id);
demuxer_t* new_demuxer(stream_t *stream,int type,int a_id,int v_id,int s_id,char *filename);
void free_demuxer_stream(demux_stream_t *ds);
void free_demuxer(demuxer_t *demuxer);
void ds_add_packet(demux_stream_t *ds,demux_packet_t* dp);
void ds_read_packet(demux_stream_t *ds, stream_t *stream, int len, double pts, off_t pos, int flags);
int demux_fill_buffer(demuxer_t *demux,demux_stream_t *ds);
int ds_fill_buffer(demux_stream_t *ds);
static inline off_t ds_tell(demux_stream_t *ds){
return (ds->dpos-ds->buffer_size)+ds->buffer_pos;
}
static inline int ds_tell_pts(demux_stream_t *ds){
return (ds->pts_bytes-ds->buffer_size)+ds->buffer_pos;
}
int demux_read_data(demux_stream_t *ds,unsigned char* mem,int len);
int demux_pattern_3(demux_stream_t *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] ) )
#if 1
#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++] ) )
#else
static inline int demux_getc(demux_stream_t *ds){
if(ds->buffer_pos>=ds->buffer_size){
if(!ds_fill_buffer(ds)){
// printf("DEMUX_GETC: EOF reached!\n");
return -1; // EOF
}
}
// printf("[%02X]",ds->buffer[ds->buffer_pos]);
return ds->buffer[ds->buffer_pos++];
}
#endif
void ds_free_packs(demux_stream_t *ds);
int ds_get_packet(demux_stream_t *ds,unsigned char **start);
int ds_get_packet_pts(demux_stream_t *ds, unsigned char **start, double *pts);
int ds_get_packet_sub(demux_stream_t *ds,unsigned char **start);
double ds_get_next_pts(demux_stream_t *ds);
int ds_parse(demux_stream_t *sh, uint8_t **buffer, int *len, double pts, off_t pos);
// This is defined here because demux_stream_t ins't defined in stream.h
stream_t* new_ds_stream(demux_stream_t *ds);
static inline int avi_stream_id(unsigned int id){
unsigned char *p=(unsigned char *)&id;
unsigned char a,b;
#if HAVE_BIGENDIAN
a=p[3]-'0'; b=p[2]-'0';
#else
a=p[0]-'0'; b=p[1]-'0';
#endif
if(a>9 || b>9) return 100; // invalid ID
return a*10+b;
}
demuxer_t* demux_open(stream_t *stream,int file_format,int aid,int vid,int sid,char* filename);
void demux_flush(demuxer_t *demuxer);
int demux_seek(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags);
demuxer_t* new_demuxers_demuxer(demuxer_t* vd, demuxer_t* ad, demuxer_t* sd);
// AVI demuxer params:
extern int index_mode; // -1=untouched 0=don't use index 1=use (geneate) index
extern char *index_file_save, *index_file_load;
extern int force_ni;
extern int pts_from_bps;
extern int extension_parsing;
int demux_info_add(demuxer_t *demuxer, const char *opt, const char *param);
char* demux_info_get(demuxer_t *demuxer, const char *opt);
int demux_info_print(demuxer_t *demuxer);
int demux_control(demuxer_t *demuxer, int cmd, void *arg);
#ifdef CONFIG_OGGVORBIS
/* Found in demux_ogg.c */
int demux_ogg_num_subs(demuxer_t *demuxer);
int demux_ogg_sub_id(demuxer_t *demuxer, int index);
#endif
int demuxer_get_current_time(demuxer_t *demuxer);
double demuxer_get_time_length(demuxer_t *demuxer);
int demuxer_get_percent_pos(demuxer_t *demuxer);
int demuxer_switch_audio(demuxer_t *demuxer, int index);
int demuxer_switch_video(demuxer_t *demuxer, int index);
int demuxer_type_by_filename(char* filename);
void demuxer_help(void);
int get_demuxer_type_from_name(char *demuxer_name, int *force);
int demuxer_add_attachment(demuxer_t* demuxer, const char* name,
const char* type, const void* data, size_t size);
int demuxer_add_chapter(demuxer_t* demuxer, const char* name, uint64_t start, uint64_t end);
int demuxer_seek_chapter(demuxer_t *demuxer, int chapter, int mode, float *seek_pts, int *num_chapters, char **chapter_name);
/// Get current chapter index if available.
int demuxer_get_current_chapter(demuxer_t *demuxer);
/// Get chapter name by index if available.
char *demuxer_chapter_name(demuxer_t *demuxer, int chapter);
/// Get chapter display name by index.
char *demuxer_chapter_display_name(demuxer_t *demuxer, int chapter);
/// Get chapter start time and end time by index if available.
float demuxer_chapter_time(demuxer_t *demuxer, int chapter, float *end);
/// Get total chapter number.
int demuxer_chapter_count(demuxer_t *demuxer);
/// Get current angle index.
int demuxer_get_current_angle(demuxer_t *demuxer);
/// Set angle.
int demuxer_set_angle(demuxer_t *demuxer, int angle);
/// Get number of angles.
int demuxer_angles_count(demuxer_t *demuxer);
// get the index of a track
// lang is a comma-separated list
int demuxer_audio_track_by_lang(demuxer_t* demuxer, char* lang);
int demuxer_sub_track_by_lang(demuxer_t* demuxer, char* lang);
// find the default track
// for subtitles, it is the first track with default attribute
// for audio, additionally, the first track is selected if no track has default attribute set
int demuxer_default_audio_track(demuxer_t* d);
int demuxer_default_sub_track(demuxer_t* d);
#endif /* MPLAYER_DEMUXER_H */
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