libmpdemux/demuxer.h

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #ifndef MPLAYER_DEMUXER_H
  20 #define MPLAYER_DEMUXER_H
  21
  22 #include <sys/types.h>
  23 #include <stdint.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <stdbool.h>
  27
  28 #include "stream/stream.h"
  29
  30 struct MPOpts;
  31
  32 #ifdef HAVE_BUILTIN_EXPECT
  33 #define likely(x) __builtin_expect ((x) != 0, 1)
  34 #define unlikely(x) __builtin_expect ((x) != 0, 0)
  35 #else
  36 #define likely(x) (x)
  37 #define unlikely(x) (x)
  38 #endif
  39
  40 #define MAX_PACKS 4096
  41 #define MAX_PACK_BYTES 0x8000000  // 128 MiB
  42
  43 #define DEMUXER_TYPE_UNKNOWN 0
  44 #define DEMUXER_TYPE_MPEG_ES 1
  45 #define DEMUXER_TYPE_MPEG_PS 2
  46 #define DEMUXER_TYPE_AVI 3
  47 #define DEMUXER_TYPE_AVI_NI 4
  48 #define DEMUXER_TYPE_AVI_NINI 5
  49 #define DEMUXER_TYPE_ASF 6
  50 #define DEMUXER_TYPE_MOV 7
  51 #define DEMUXER_TYPE_VIVO 8
  52 #define DEMUXER_TYPE_TV 9
  53 #define DEMUXER_TYPE_FLI 10
  54 #define DEMUXER_TYPE_REAL 11
  55 #define DEMUXER_TYPE_Y4M 12
  56 #define DEMUXER_TYPE_FILM 14
  57 #define DEMUXER_TYPE_ROQ 15
  58 #define DEMUXER_TYPE_MF 16
  59 #define DEMUXER_TYPE_AUDIO 17
  60 #define DEMUXER_TYPE_OGG 18
  61 #define DEMUXER_TYPE_RAWAUDIO 20
  62 #define DEMUXER_TYPE_RTP 21
  63 #define DEMUXER_TYPE_RAWDV 22
  64 #define DEMUXER_TYPE_PVA 23
  65 #define DEMUXER_TYPE_SMJPEG 24
  66 #define DEMUXER_TYPE_XMMS 25
  67 #define DEMUXER_TYPE_RAWVIDEO 26
  68 #define DEMUXER_TYPE_MPEG4_ES 27
  69 #define DEMUXER_TYPE_GIF 28
  70 #define DEMUXER_TYPE_MPEG_TS 29
  71 #define DEMUXER_TYPE_H264_ES 30
  72 #define DEMUXER_TYPE_MATROSKA 31
  73 #define DEMUXER_TYPE_REALAUDIO 32
  74 #define DEMUXER_TYPE_MPEG_TY 33
  75 #define DEMUXER_TYPE_LMLM4 34
  76 #define DEMUXER_TYPE_LAVF 35
  77 #define DEMUXER_TYPE_NSV 36
  78 #define DEMUXER_TYPE_VQF 37
  79 #define DEMUXER_TYPE_AVS 38
  80 #define DEMUXER_TYPE_AAC 39
  81 #define DEMUXER_TYPE_MPC 40
  82 #define DEMUXER_TYPE_MPEG_PES 41
  83 #define DEMUXER_TYPE_MPEG_GXF 42
  84 #define DEMUXER_TYPE_NUT 43
  85 #define DEMUXER_TYPE_LAVF_PREFERRED 44
  86 #define DEMUXER_TYPE_RTP_NEMESI 45
  87 #define DEMUXER_TYPE_MNG 46
  88
  89 // This should always match the higest demuxer type number.
  90 // Unless you want to disallow users to force the demuxer to some types
  91 #define DEMUXER_TYPE_MIN 0
  92 #define DEMUXER_TYPE_MAX 46
  93
  94 #define DEMUXER_TYPE_DEMUXERS (1<<16)
  95 // A virtual demuxer type for the network code
  96 #define DEMUXER_TYPE_PLAYLIST (2<<16)
  97
  98
  99 #define MP_NOPTS_VALUE (-1LL<<63) //both int64_t and double should be able to represent this exactly
 100
 101
 102 // DEMUXER control commands/answers
 103 #define DEMUXER_CTRL_NOTIMPL -1
 104 #define DEMUXER_CTRL_DONTKNOW 0
 105 #define DEMUXER_CTRL_OK 1
 106 #define DEMUXER_CTRL_GUESS 2
 107 #define DEMUXER_CTRL_GET_TIME_LENGTH 10
 108 #define DEMUXER_CTRL_GET_PERCENT_POS 11
 109 #define DEMUXER_CTRL_SWITCH_AUDIO 12
 110 #define DEMUXER_CTRL_RESYNC 13
 111 #define DEMUXER_CTRL_SWITCH_VIDEO 14
 112 #define DEMUXER_CTRL_IDENTIFY_PROGRAM 15
 113 #define DEMUXER_CTRL_CORRECT_PTS 16
 114
 115 #define SEEK_ABSOLUTE (1 << 0)
 116 #define SEEK_FACTOR   (1 << 1)
 117 #define SEEK_FORWARD  (1 << 2)
 118 #define SEEK_BACKWARD (1 << 3)
 119
 120 #define MP_INPUT_BUFFER_PADDING_SIZE 64
 121
 122 // Holds one packet/frame/whatever
 123 typedef struct demux_packet {
 124   int len;
 125   double pts;
 126   double endpts;
 127   double stream_pts;
 128   off_t pos;  // position in index (AVI) or file (MPG)
 129   unsigned char* buffer;
 130   int flags; // keyframe, etc
 131   int refcount;   //refcounter for the master packet, if 0, buffer can be free()d
 132   struct demux_packet *master; //pointer to the master packet if this one is a cloned one
 133   struct demux_packet *next;
 134 } demux_packet_t;
 135
 136 typedef struct demux_stream {
 137   int buffer_pos;          // current buffer position
 138   int buffer_size;         // current buffer size
 139   unsigned char* buffer;   // current buffer, never free() it, always use free_demux_packet(buffer_ref);
 140   double pts;              // current buffer's pts
 141   int pts_bytes;           // number of bytes read after last pts stamp
 142   int eof;                 // end of demuxed stream? (true if all buffer empty)
 143   off_t pos;                 // position in the input stream (file)
 144   off_t dpos;                // position in the demuxed stream
 145   int pack_no;             // serial number of packet
 146   int flags;               // flags of current packet (keyframe etc)
 147   int non_interleaved;     // 1 if this stream is not properly interleaved,
 148                            // so e.g. subtitle handling must do explicit reads.
 149 //---------------
 150   int packs;              // number of packets in buffer
 151   int bytes;              // total bytes of packets in buffer
 152   demux_packet_t *first;  // read to current buffer from here
 153   demux_packet_t *last;   // append new packets from input stream to here
 154   demux_packet_t *current;// needed for refcounting of the buffer
 155   int id;                 // stream ID  (for multiple audio/video streams)
 156   struct demuxer *demuxer; // parent demuxer structure (stream handler)
 157 // ---- asf -----
 158   demux_packet_t *asf_packet;  // read asf fragments here
 159   int asf_seq;
 160 // ---- mov -----
 161   unsigned int ss_mul,ss_div;
 162 // ---- stream header ----
 163   void* sh;
 164 } demux_stream_t;
 165
 166 typedef struct demuxer_info {
 167   char *name;
 168   char *author;
 169   char *encoder;
 170   char *comments;
 171   char *copyright;
 172 } demuxer_info_t;
 173
 174 #define MAX_A_STREAMS 256
 175 #define MAX_V_STREAMS 256
 176 #define MAX_S_STREAMS 256
 177
 178 struct demuxer;
 179
 180 /**
 181  * Demuxer description structure
 182  */
 183 typedef struct demuxer_desc {
 184   const char *info; ///< What is it (long name and/or description)
 185   const char *name; ///< Demuxer name, used with -demuxer switch
 186   const char *shortdesc; ///< Description printed at demuxer detection
 187   const char *author; ///< Demuxer author(s)
 188   const char *comment; ///< Comment, printed with -demuxer help
 189
 190   int type; ///< DEMUXER_TYPE_xxx
 191   int safe_check; ///< If 1 detection is safe and fast, do it before file extension check
 192
 193   /// Check if can demux the file, return DEMUXER_TYPE_xxx on success
 194   int (*check_file)(struct demuxer *demuxer); ///< Mandatory if safe_check == 1, else optional
 195   /// Get packets from file, return 0 on eof
 196   int (*fill_buffer)(struct demuxer *demuxer, demux_stream_t *ds); ///< Mandatory
 197   /// Open the demuxer, return demuxer on success, NULL on failure
 198   struct demuxer* (*open)(struct demuxer *demuxer); ///< Optional
 199   /// Close the demuxer
 200   void (*close)(struct demuxer *demuxer); ///< Optional
 201   // Seek
 202   void (*seek)(struct demuxer *demuxer, float rel_seek_secs, float audio_delay, int flags); ///< Optional
 203   // Control
 204   int (*control)(struct demuxer *demuxer, int cmd, void *arg); ///< Optional
 205 } demuxer_desc_t;
 206
 207 typedef struct demux_chapter
 208 {
 209   uint64_t start, end;
 210   char* name;
 211 } demux_chapter_t;
 212
 213 struct matroska_data {
 214     unsigned char segment_uid[16];
 215     // Ordered chapter information if any
 216     struct matroska_chapter {
 217         uint64_t start;
 218         uint64_t end;
 219         bool has_segment_uid;
 220         unsigned char segment_uid[16];
 221         char *name;
 222     } *ordered_chapters;
 223     int num_ordered_chapters;
 224 };
 225
 226 typedef struct demux_attachment
 227 {
 228   char* name;
 229   char* type;
 230   void* data;
 231   unsigned int data_size;
 232 } demux_attachment_t;
 233
 234 typedef struct demuxer {
 235   const demuxer_desc_t *desc;  ///< Demuxer description structure
 236   off_t filepos; // input stream current pos.
 237   off_t movi_start;
 238   off_t movi_end;
 239   stream_t *stream;
 240   double stream_pts;       // current stream pts, if applicable (e.g. dvd)
 241   double reference_clock;
 242   char *filename; ///< Needed by avs_check_file
 243   int synced;  // stream synced (used by mpeg)
 244   int type;    // demuxer type: mpeg PS, mpeg ES, avi, avi-ni, avi-nini, asf
 245   int file_format;  // file format: mpeg/avi/asf
 246   int seekable;  // flag
 247     /* Set if using absolute seeks for small movements is OK (no pts resets
 248      * that would make pts ambigious, preferably supports back/forward flags */
 249     bool accurate_seek;
 250   //
 251   demux_stream_t *audio; // audio buffer/demuxer
 252   demux_stream_t *video; // video buffer/demuxer
 253   demux_stream_t *sub;   // dvd subtitle buffer/demuxer
 254
 255   // stream headers:
 256   struct sh_audio *a_streams[MAX_A_STREAMS];
 257   struct sh_video *v_streams[MAX_V_STREAMS];
 258   struct sh_sub   *s_streams[MAX_S_STREAMS];
 259
 260   // pointer to teletext decoder private data, if demuxer stream contains teletext
 261   void *teletext;
 262
 263   demux_chapter_t* chapters;
 264   int num_chapters;
 265
 266   demux_attachment_t* attachments;
 267   int num_attachments;
 268
 269     struct matroska_data matroska_data;
 270
 271   void* priv;  // fileformat-dependent data
 272   char** info;
 273   struct MPOpts *opts;
 274 } demuxer_t;
 275
 276 typedef struct {
 277   int progid;        //program id
 278   int aid, vid, sid; //audio, video and subtitle id
 279 } demux_program_t;
 280
 281 static inline demux_packet_t* new_demux_packet(int len){
 282   demux_packet_t* dp=(demux_packet_t*)malloc(sizeof(demux_packet_t));
 283   dp->len=len;
 284   dp->next=NULL;
 285   dp->pts=MP_NOPTS_VALUE;
 286   dp->endpts=MP_NOPTS_VALUE;
 287   dp->stream_pts = MP_NOPTS_VALUE;
 288   dp->pos=0;
 289   dp->flags=0;
 290   dp->refcount=1;
 291   dp->master=NULL;
 292   dp->buffer=NULL;
 293   if (len > 0 && (dp->buffer = (unsigned char *)malloc(len + MP_INPUT_BUFFER_PADDING_SIZE)))
 294     memset(dp->buffer + len, 0, 8);
 295   else
 296     dp->len = 0;
 297   return dp;
 298 }
 299
 300 static inline void resize_demux_packet(demux_packet_t* dp, int len)
 301 {
 302   if(len > 0)
 303   {
 304      dp->buffer=(unsigned char *)realloc(dp->buffer,len+8);
 305   }
 306   else
 307   {
 308      if(dp->buffer) free(dp->buffer);
 309      dp->buffer=NULL;
 310   }
 311   dp->len=len;
 312   if (dp->buffer)
 313      memset(dp->buffer + len, 0, 8);
 314   else
 315      dp->len = 0;
 316 }
 317
 318 static inline demux_packet_t* clone_demux_packet(demux_packet_t* pack){
 319   demux_packet_t* dp=(demux_packet_t*)malloc(sizeof(demux_packet_t));
 320   while(pack->master) pack=pack->master; // find the master
 321   memcpy(dp,pack,sizeof(demux_packet_t));
 322   dp->next=NULL;
 323   dp->refcount=0;
 324   dp->master=pack;
 325   pack->refcount++;
 326   return dp;
 327 }
 328
 329 static inline void free_demux_packet(demux_packet_t* dp){
 330   if (dp->master==NULL){  //dp is a master packet
 331     dp->refcount--;
 332     if (dp->refcount==0){
 333       if (dp->buffer) free(dp->buffer);
 334       free(dp);
 335     }
 336     return;
 337   }
 338   // dp is a clone:
 339   free_demux_packet(dp->master);
 340   free(dp);
 341 }
 342
 343 #ifndef SIZE_MAX
 344 #define SIZE_MAX ((size_t)-1)
 345 #endif
 346
 347 static inline void *realloc_struct(void *ptr, size_t nmemb, size_t size) {
 348   if (nmemb > SIZE_MAX / size) {
 349     free(ptr);
 350     return NULL;
 351   }
 352   return realloc(ptr, nmemb * size);
 353 }
 354
 355 demux_stream_t* new_demuxer_stream(struct demuxer *demuxer,int id);
 356 demuxer_t* new_demuxer(struct MPOpts *opts, stream_t *stream,int type,int a_id,int v_id,int s_id,char *filename);
 357 void free_demuxer_stream(demux_stream_t *ds);
 358 void free_demuxer(demuxer_t *demuxer);
 359
 360 void ds_add_packet(demux_stream_t *ds,demux_packet_t* dp);
 361 void ds_read_packet(demux_stream_t *ds, stream_t *stream, int len, double pts, off_t pos, int flags);
 362
 363 int demux_fill_buffer(demuxer_t *demux,demux_stream_t *ds);
 364 int ds_fill_buffer(demux_stream_t *ds);
 365
 366 static inline off_t ds_tell(demux_stream_t *ds){
 367   return (ds->dpos-ds->buffer_size)+ds->buffer_pos;
 368 }
 369
 370 static inline int ds_tell_pts(demux_stream_t *ds){
 371   return (ds->pts_bytes-ds->buffer_size)+ds->buffer_pos;
 372 }
 373
 374 int demux_read_data(demux_stream_t *ds,unsigned char* mem,int len);
 375 int demux_pattern_3(demux_stream_t *ds, unsigned char *mem, int maxlen,
 376                     int *read, uint32_t pattern);
 377
 378 #define demux_peekc(ds) (\
 379      (likely(ds->buffer_pos<ds->buffer_size)) ? ds->buffer[ds->buffer_pos] \
 380      :((unlikely(!ds_fill_buffer(ds)))? (-1) : ds->buffer[ds->buffer_pos] ) )
 381 #if 1
 382 #define demux_getc(ds) (\
 383      (likely(ds->buffer_pos<ds->buffer_size)) ? ds->buffer[ds->buffer_pos++] \
 384      :((unlikely(!ds_fill_buffer(ds)))? (-1) : ds->buffer[ds->buffer_pos++] ) )
 385 #else
 386 static inline int demux_getc(demux_stream_t *ds){
 387   if(ds->buffer_pos>=ds->buffer_size){
 388     if(!ds_fill_buffer(ds)){
 389 //      printf("DEMUX_GETC: EOF reached!\n");
 390       return -1; // EOF
 391     }
 392   }
 393 //  printf("[%02X]",ds->buffer[ds->buffer_pos]);
 394   return ds->buffer[ds->buffer_pos++];
 395 }
 396 #endif
 397
 398 void ds_free_packs(demux_stream_t *ds);
 399 int ds_get_packet(demux_stream_t *ds,unsigned char **start);
 400 int ds_get_packet_pts(demux_stream_t *ds, unsigned char **start, double *pts);
 401 int ds_get_packet_sub(demux_stream_t *ds,unsigned char **start);
 402 double ds_get_next_pts(demux_stream_t *ds);
 403 int ds_parse(demux_stream_t *sh, uint8_t **buffer, int *len, double pts, off_t pos);
 404 void ds_clear_parser(demux_stream_t *sh);
 405
 406 // This is defined here because demux_stream_t ins't defined in stream.h
 407 stream_t* new_ds_stream(demux_stream_t *ds);
 408
 409 static inline int avi_stream_id(unsigned int id){
 410   unsigned char a,b;
 411   a = id - '0';
 412   b = (id >> 8) - '0';
 413   if(a>9 || b>9) return 100; // invalid ID
 414   return a*10+b;
 415 }
 416
 417 demuxer_t* demux_open(struct MPOpts *opts, stream_t *stream,int file_format,int aid,int vid,int sid,char* filename);
 418 void demux_flush(demuxer_t *demuxer);
 419 int demux_seek(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags);
 420 demuxer_t*  new_demuxers_demuxer(demuxer_t* vd, demuxer_t* ad, demuxer_t* sd);
 421
 422 // AVI demuxer params:
 423 extern int index_mode;  // -1=untouched  0=don't use index  1=use (geneate) index
 424 extern char *index_file_save, *index_file_load;
 425 extern int force_ni;
 426 extern int pts_from_bps;
 427
 428 extern int extension_parsing;
 429
 430 int demux_info_add(demuxer_t *demuxer, const char *opt, const char *param);
 431 char* demux_info_get(demuxer_t *demuxer, const char *opt);
 432 int demux_info_print(demuxer_t *demuxer);
 433 int demux_control(demuxer_t *demuxer, int cmd, void *arg);
 434
 435 int demuxer_get_current_time(demuxer_t *demuxer);
 436 double demuxer_get_time_length(demuxer_t *demuxer);
 437 int demuxer_get_percent_pos(demuxer_t *demuxer);
 438 int demuxer_switch_audio(demuxer_t *demuxer, int index);
 439 int demuxer_switch_video(demuxer_t *demuxer, int index);
 440
 441 int demuxer_type_by_filename(char* filename);
 442
 443 void demuxer_help(void);
 444 int get_demuxer_type_from_name(char *demuxer_name, int *force);
 445
 446 int demuxer_add_attachment(demuxer_t *demuxer, const char *name,
 447                            int name_maxlen, const char *type, int type_maxlen,
 448                            const void *data, size_t size);
 449 int demuxer_add_chapter(demuxer_t *demuxer, const char *name, int name_maxlen,
 450                         uint64_t start, uint64_t end);
 451 int demuxer_seek_chapter(demuxer_t *demuxer, int chapter, double *seek_pts,
 452                          char **chapter_name);
 453
 454 /// Get current chapter index if available.
 455 int demuxer_get_current_chapter(demuxer_t *demuxer);
 456 /// Get chapter name by index if available.
 457 char *demuxer_chapter_name(demuxer_t *demuxer, int chapter);
 458 /// Get chapter display name by index.
 459 char *demuxer_chapter_display_name(demuxer_t *demuxer, int chapter);
 460 /// Get chapter start time and end time by index if available.
 461 float demuxer_chapter_time(demuxer_t *demuxer, int chapter, float *end);
 462 /// Get total chapter number.
 463 int demuxer_chapter_count(demuxer_t *demuxer);
 464 /// Get current angle index.
 465 int demuxer_get_current_angle(demuxer_t *demuxer);
 466 /// Set angle.
 467 int demuxer_set_angle(demuxer_t *demuxer, int angle);
 468 /// Get number of angles.
 469 int demuxer_angles_count(demuxer_t *demuxer);
 470
 471 // get the index of a track
 472 // lang is a comma-separated list
 473 int demuxer_audio_track_by_lang(demuxer_t* demuxer, char* lang);
 474 int demuxer_sub_track_by_lang(demuxer_t* demuxer, char* lang);
 475
 476 // find the default track
 477 // for subtitles, it is the first track with default attribute
 478 // for audio, additionally, the first track is selected if no track has default attribute set
 479 int demuxer_default_audio_track(demuxer_t* d);
 480 int demuxer_default_sub_track(demuxer_t* d);
 481
 482 #endif /* MPLAYER_DEMUXER_H */