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mpv/libmpdemux/demuxer.h

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C
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#ifndef __DEMUXER_H
#define __DEMUXER_H 1
#define MAX_PACKS 4096
#ifdef HAVE_TV_BSDBT848
#define MAX_PACK_BYTES 0x2000000
#else
#define MAX_PACK_BYTES 0x800000
#endif
#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_NUV 13
#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_BMP 19
#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
// 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 23
#define DEMUXER_TYPE_DEMUXERS (1<<16)
// A virtual demuxer type for the network code
#define DEMUXER_TYPE_PLAYLIST (2<<16)
#define DEMUXER_TIME_NONE 0
#define DEMUXER_TIME_PTS 1
#define DEMUXER_TIME_FILE 2
#define DEMUXER_TIME_BPS 3
// 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
// Holds one packet/frame/whatever
typedef struct demux_packet_st {
int len;
float 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);
float 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 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
typedef struct demuxer_st {
off_t filepos; // input stream current pos.
off_t movi_start;
off_t movi_end;
stream_t *stream;
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)
char s_streams[32]; // dvd subtitles (flag)
void* priv; // fileformat-dependent data
char** info;
} demuxer_t;
inline static 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=0;
dp->pos=0;
dp->flags=0;
dp->refcount=1;
dp->master=NULL;
dp->buffer=len?(unsigned char*)malloc(len+8):NULL;
if(len) memset(dp->buffer+len,0,8);
return dp;
}
inline static 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;
}
inline static 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);
}
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);
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,float 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);
inline static off_t ds_tell(demux_stream_t *ds){
return (ds->dpos-ds->buffer_size)+ds->buffer_pos;
}
inline static 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_read_data_pack(demux_stream_t *ds,unsigned char* mem,int len);
#if 1
#define demux_getc(ds) (\
(ds->buffer_pos<ds->buffer_size) ? ds->buffer[ds->buffer_pos++] \
:((!ds_fill_buffer(ds))? (-1) : ds->buffer[ds->buffer_pos++] ) )
#else
inline static 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_sub(demux_stream_t *ds,unsigned char **start);
float ds_get_next_pts(demux_stream_t *ds);
// 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 WORDS_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);
int demux_seek(demuxer_t *demuxer,float rel_seek_secs,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 int force_ni;
extern int pts_from_bps;
int demux_info_add(demuxer_t *demuxer, char *opt, char *param);
char* demux_info_get(demuxer_t *demuxer, char *opt);
int demux_info_print(demuxer_t *demuxer);
int demux_control(demuxer_t *demuxer, int cmd, void *arg);
#endif
extern unsigned long demuxer_get_time_length(demuxer_t *demuxer);
extern int demuxer_get_percent_pos(demuxer_t *demuxer);
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