libmpdemux/demuxer.h

   1 #ifndef DEMUXER_H
   2 #define DEMUXER_H
   3
   4 #ifdef USE_ASS
   5 #include "libass/ass_types.h"
   6 #endif
   7
   8 #define MAX_PACKS 4096
   9 #ifdef HAVE_TV_BSDBT848
  10 #define MAX_PACK_BYTES 0x2000000
  11 #else
  12 #define MAX_PACK_BYTES 0x800000
  13 #endif
  14
  15 #define DEMUXER_TYPE_UNKNOWN 0
  16 #define DEMUXER_TYPE_MPEG_ES 1
  17 #define DEMUXER_TYPE_MPEG_PS 2
  18 #define DEMUXER_TYPE_AVI 3
  19 #define DEMUXER_TYPE_AVI_NI 4
  20 #define DEMUXER_TYPE_AVI_NINI 5
  21 #define DEMUXER_TYPE_ASF 6
  22 #define DEMUXER_TYPE_MOV 7
  23 #define DEMUXER_TYPE_VIVO 8
  24 #define DEMUXER_TYPE_TV 9
  25 #define DEMUXER_TYPE_FLI 10
  26 #define DEMUXER_TYPE_REAL 11
  27 #define DEMUXER_TYPE_Y4M 12
  28 #define DEMUXER_TYPE_NUV 13
  29 #define DEMUXER_TYPE_FILM 14
  30 #define DEMUXER_TYPE_ROQ 15
  31 #define DEMUXER_TYPE_MF 16
  32 #define DEMUXER_TYPE_AUDIO 17
  33 #define DEMUXER_TYPE_OGG 18
  34 #define DEMUXER_TYPE_RAWAUDIO 20
  35 #define DEMUXER_TYPE_RTP 21
  36 #define DEMUXER_TYPE_RAWDV 22
  37 #define DEMUXER_TYPE_PVA 23
  38 #define DEMUXER_TYPE_SMJPEG 24
  39 #define DEMUXER_TYPE_XMMS 25
  40 #define DEMUXER_TYPE_RAWVIDEO 26
  41 #define DEMUXER_TYPE_MPEG4_ES 27
  42 #define DEMUXER_TYPE_GIF 28
  43 #define DEMUXER_TYPE_MPEG_TS 29
  44 #define DEMUXER_TYPE_H264_ES 30
  45 #define DEMUXER_TYPE_MATROSKA 31
  46 #define DEMUXER_TYPE_REALAUDIO 32
  47 #define DEMUXER_TYPE_MPEG_TY 33
  48 #define DEMUXER_TYPE_LMLM4 34
  49 #define DEMUXER_TYPE_LAVF 35
  50 #define DEMUXER_TYPE_NSV 36
  51 #define DEMUXER_TYPE_VQF 37
  52 #define DEMUXER_TYPE_AVS 38
  53 #define DEMUXER_TYPE_AAC 39
  54 #define DEMUXER_TYPE_MPC 40
  55 #define DEMUXER_TYPE_MPEG_PES 41
  56 #define DEMUXER_TYPE_MPEG_GXF 42
  57 #define DEMUXER_TYPE_NUT 43
  58 #define DEMUXER_TYPE_LAVF_PREFERRED 44
  59 #define DEMUXER_TYPE_RTP_NEMESI 45
  60
  61 // This should always match the higest demuxer type number.
  62 // Unless you want to disallow users to force the demuxer to some types
  63 #define DEMUXER_TYPE_MIN 0
  64 #define DEMUXER_TYPE_MAX 45
  65
  66 #define DEMUXER_TYPE_DEMUXERS (1<<16)
  67 // A virtual demuxer type for the network code
  68 #define DEMUXER_TYPE_PLAYLIST (2<<16)
  69
  70
  71 #define MP_NOPTS_VALUE (-1LL<<63) //both int64_t and double should be able to represent this exactly
  72
  73
  74 // DEMUXER control commands/answers
  75 #define DEMUXER_CTRL_NOTIMPL -1
  76 #define DEMUXER_CTRL_DONTKNOW 0
  77 #define DEMUXER_CTRL_OK 1
  78 #define DEMUXER_CTRL_GUESS 2
  79 #define DEMUXER_CTRL_GET_TIME_LENGTH 10
  80 #define DEMUXER_CTRL_GET_PERCENT_POS 11
  81 #define DEMUXER_CTRL_SWITCH_AUDIO 12
  82 #define DEMUXER_CTRL_RESYNC 13
  83 #define DEMUXER_CTRL_SWITCH_VIDEO 14
  84 #define DEMUXER_CTRL_IDENTIFY_PROGRAM 15
  85
  86 // Holds one packet/frame/whatever
  87 typedef struct demux_packet_st {
  88   int len;
  89   double pts;
  90   double endpts;
  91   double stream_pts;
  92   off_t pos;  // position in index (AVI) or file (MPG)
  93   unsigned char* buffer;
  94   int flags; // keyframe, etc
  95   int refcount;   //refcounter for the master packet, if 0, buffer can be free()d
  96   struct demux_packet_st* master; //pointer to the master packet if this one is a cloned one
  97   struct demux_packet_st* next;
  98 } demux_packet_t;
  99
 100 typedef struct {
 101   int buffer_pos;          // current buffer position
 102   int buffer_size;         // current buffer size
 103   unsigned char* buffer;   // current buffer, never free() it, always use free_demux_packet(buffer_ref);
 104   double pts;              // current buffer's pts
 105   int pts_bytes;           // number of bytes read after last pts stamp
 106   int eof;                 // end of demuxed stream? (true if all buffer empty)
 107   off_t pos;                 // position in the input stream (file)
 108   off_t dpos;                // position in the demuxed stream
 109   int pack_no;             // serial number of packet
 110   int flags;               // flags of current packet (keyframe etc)
 111 //---------------
 112   int packs;              // number of packets in buffer
 113   int bytes;              // total bytes of packets in buffer
 114   demux_packet_t *first;  // read to current buffer from here
 115   demux_packet_t *last;   // append new packets from input stream to here
 116   demux_packet_t *current;// needed for refcounting of the buffer
 117   int id;                 // stream ID  (for multiple audio/video streams)
 118   struct demuxer_st *demuxer; // parent demuxer structure (stream handler)
 119 // ---- asf -----
 120   demux_packet_t *asf_packet;  // read asf fragments here
 121   int asf_seq;
 122 // ---- mov -----
 123   unsigned int ss_mul,ss_div;
 124 // ---- stream header ----
 125   void* sh;
 126 } demux_stream_t;
 127
 128 typedef struct demuxer_info_st {
 129   char *name;
 130   char *author;
 131   char *encoder;
 132   char *comments;
 133   char *copyright;
 134 } demuxer_info_t;
 135
 136 #define MAX_A_STREAMS 256
 137 #define MAX_V_STREAMS 256
 138 #define MAX_S_STREAMS 32
 139
 140 struct demuxer_st;
 141
 142 extern int correct_pts;
 143
 144 /**
 145  * Demuxer description structure
 146  */
 147 typedef struct demuxers_desc_st {
 148   const char *info; ///< What is it (long name and/or description)
 149   const char *name; ///< Demuxer name, used with -demuxer switch
 150   const char *shortdesc; ///< Description printed at demuxer detection
 151   const char *author; ///< Demuxer author(s)
 152   const char *comment; ///< Comment, printed with -demuxer help
 153
 154   int type; ///< DEMUXER_TYPE_xxx
 155   int safe_check; ///< If 1 detection is safe and fast, do it before file extension check
 156
 157   /// Check if can demux the file, return DEMUXER_TYPE_xxx on success
 158   int (*check_file)(struct demuxer_st *demuxer); ///< Mandatory if safe_check == 1, else optional
 159   /// Get packets from file, return 0 on eof
 160   int (*fill_buffer)(struct demuxer_st *demuxer, demux_stream_t *ds); ///< Mandatory
 161   /// Open the demuxer, return demuxer on success, NULL on failure
 162   struct demuxer_st* (*open)(struct demuxer_st *demuxer); ///< Optional
 163   /// Close the demuxer
 164   void (*close)(struct demuxer_st *demuxer); ///< Optional
 165   // Seek
 166   void (*seek)(struct demuxer_st *demuxer, float rel_seek_secs, float audio_delay, int flags); ///< Optional
 167   // Control
 168   int (*control)(struct demuxer_st *demuxer, int cmd, void *arg); ///< Optional
 169 } demuxer_desc_t;
 170
 171 typedef struct demux_chapter_s
 172 {
 173   uint64_t start, end;
 174   char* name;
 175 } demux_chapter_t;
 176
 177 typedef struct demuxer_st {
 178   demuxer_desc_t *desc;  ///< Demuxer description structure
 179   off_t filepos; // input stream current pos.
 180   off_t movi_start;
 181   off_t movi_end;
 182   stream_t *stream;
 183   double stream_pts;       // current stream pts, if applicable (e.g. dvd)
 184   char *filename; ///< Needed by avs_check_file
 185   int synced;  // stream synced (used by mpeg)
 186   int type;    // demuxer type: mpeg PS, mpeg ES, avi, avi-ni, avi-nini, asf
 187   int file_format;  // file format: mpeg/avi/asf
 188   int seekable;  // flag
 189   //
 190   demux_stream_t *audio; // audio buffer/demuxer
 191   demux_stream_t *video; // video buffer/demuxer
 192   demux_stream_t *sub;   // dvd subtitle buffer/demuxer
 193
 194   // stream headers:
 195   void* a_streams[MAX_A_STREAMS]; // audio streams (sh_audio_t)
 196   void* v_streams[MAX_V_STREAMS]; // video sterams (sh_video_t)
 197   void *s_streams[MAX_S_STREAMS];   // dvd subtitles (flag)
 198
 199   demux_chapter_t* chapters;
 200   int num_chapters;
 201
 202   void* priv;  // fileformat-dependent data
 203   char** info;
 204 } demuxer_t;
 205
 206 typedef struct {
 207   int progid;        //program id
 208   int aid, vid, sid; //audio, video and subtitle id
 209 } demux_program_t;
 210
 211 static inline demux_packet_t* new_demux_packet(int len){
 212   demux_packet_t* dp=(demux_packet_t*)malloc(sizeof(demux_packet_t));
 213   dp->len=len;
 214   dp->next=NULL;
 215   // still using 0 by default in case there is some code that uses 0 for both
 216   // unknown and a valid pts value
 217   dp->pts=correct_pts ? MP_NOPTS_VALUE : 0;
 218   dp->endpts=MP_NOPTS_VALUE;
 219   dp->stream_pts = MP_NOPTS_VALUE;
 220   dp->pos=0;
 221   dp->flags=0;
 222   dp->refcount=1;
 223   dp->master=NULL;
 224   dp->buffer=NULL;
 225   if (len > 0 && (dp->buffer = (unsigned char *)malloc(len + 8)))
 226     memset(dp->buffer + len, 0, 8);
 227   else
 228     dp->len = 0;
 229   return dp;
 230 }
 231
 232 static inline void resize_demux_packet(demux_packet_t* dp, int len)
 233 {
 234   if(len > 0)
 235   {
 236      dp->buffer=(unsigned char *)realloc(dp->buffer,len+8);
 237   }
 238   else
 239   {
 240      if(dp->buffer) free(dp->buffer);
 241      dp->buffer=NULL;
 242   }
 243   dp->len=len;
 244   if (dp->buffer)
 245      memset(dp->buffer + len, 0, 8);
 246   else
 247      dp->len = 0;
 248 }
 249
 250 static inline demux_packet_t* clone_demux_packet(demux_packet_t* pack){
 251   demux_packet_t* dp=(demux_packet_t*)malloc(sizeof(demux_packet_t));
 252   while(pack->master) pack=pack->master; // find the master
 253   memcpy(dp,pack,sizeof(demux_packet_t));
 254   dp->next=NULL;
 255   dp->refcount=0;
 256   dp->master=pack;
 257   pack->refcount++;
 258   return dp;
 259 }
 260
 261 static inline void free_demux_packet(demux_packet_t* dp){
 262   if (dp->master==NULL){  //dp is a master packet
 263     dp->refcount--;
 264     if (dp->refcount==0){
 265       if (dp->buffer) free(dp->buffer);
 266       free(dp);
 267     }
 268     return;
 269   }
 270   // dp is a clone:
 271   free_demux_packet(dp->master);
 272   free(dp);
 273 }
 274
 275 #ifndef SIZE_MAX
 276 #define SIZE_MAX ((size_t)-1)
 277 #endif
 278
 279 static inline void *realloc_struct(void *ptr, size_t nmemb, size_t size) {
 280   if (nmemb > SIZE_MAX / size) {
 281     free(ptr);
 282     return NULL;
 283   }
 284   return realloc(ptr, nmemb * size);
 285 }
 286
 287 demux_stream_t* new_demuxer_stream(struct demuxer_st *demuxer,int id);
 288 demuxer_t* new_demuxer(stream_t *stream,int type,int a_id,int v_id,int s_id,char *filename);
 289 void free_demuxer_stream(demux_stream_t *ds);
 290 void free_demuxer(demuxer_t *demuxer);
 291
 292 void ds_add_packet(demux_stream_t *ds,demux_packet_t* dp);
 293 void ds_read_packet(demux_stream_t *ds, stream_t *stream, int len, double pts, off_t pos, int flags);
 294
 295 int demux_fill_buffer(demuxer_t *demux,demux_stream_t *ds);
 296 int ds_fill_buffer(demux_stream_t *ds);
 297
 298 static inline off_t ds_tell(demux_stream_t *ds){
 299   return (ds->dpos-ds->buffer_size)+ds->buffer_pos;
 300 }
 301
 302 static inline int ds_tell_pts(demux_stream_t *ds){
 303   return (ds->pts_bytes-ds->buffer_size)+ds->buffer_pos;
 304 }
 305
 306 int demux_read_data(demux_stream_t *ds,unsigned char* mem,int len);
 307 int demux_read_data_pack(demux_stream_t *ds,unsigned char* mem,int len);
 308 int demux_pattern_3(demux_stream_t *ds, unsigned char *mem, int maxlen,
 309                     int *read, uint32_t pattern);
 310
 311 #define demux_peekc(ds) (\
 312      (likely(ds->buffer_pos<ds->buffer_size)) ? ds->buffer[ds->buffer_pos] \
 313      :((unlikely(!ds_fill_buffer(ds)))? (-1) : ds->buffer[ds->buffer_pos] ) )
 314 #if 1
 315 #define demux_getc(ds) (\
 316      (likely(ds->buffer_pos<ds->buffer_size)) ? ds->buffer[ds->buffer_pos++] \
 317      :((unlikely(!ds_fill_buffer(ds)))? (-1) : ds->buffer[ds->buffer_pos++] ) )
 318 #else
 319 static inline int demux_getc(demux_stream_t *ds){
 320   if(ds->buffer_pos>=ds->buffer_size){
 321     if(!ds_fill_buffer(ds)){
 322 //      printf("DEMUX_GETC: EOF reached!\n");
 323       return -1; // EOF
 324     }
 325   }
 326 //  printf("[%02X]",ds->buffer[ds->buffer_pos]);
 327   return ds->buffer[ds->buffer_pos++];
 328 }
 329 #endif
 330
 331 void ds_free_packs(demux_stream_t *ds);
 332 int ds_get_packet(demux_stream_t *ds,unsigned char **start);
 333 int ds_get_packet_pts(demux_stream_t *ds, unsigned char **start, double *pts);
 334 int ds_get_packet_sub(demux_stream_t *ds,unsigned char **start);
 335 double ds_get_next_pts(demux_stream_t *ds);
 336
 337 // This is defined here because demux_stream_t ins't defined in stream.h
 338 stream_t* new_ds_stream(demux_stream_t *ds);
 339
 340 static inline int avi_stream_id(unsigned int id){
 341   unsigned char *p=(unsigned char *)&id;
 342   unsigned char a,b;
 343 #if WORDS_BIGENDIAN
 344   a=p[3]-'0'; b=p[2]-'0';
 345 #else
 346   a=p[0]-'0'; b=p[1]-'0';
 347 #endif
 348   if(a>9 || b>9) return 100; // invalid ID
 349   return a*10+b;
 350 }
 351
 352 demuxer_t* demux_open(stream_t *stream,int file_format,int aid,int vid,int sid,char* filename);
 353 int demux_seek(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags);
 354 demuxer_t*  new_demuxers_demuxer(demuxer_t* vd, demuxer_t* ad, demuxer_t* sd);
 355
 356 // AVI demuxer params:
 357 extern int index_mode;  // -1=untouched  0=don't use index  1=use (geneate) index
 358 extern char *index_file_save, *index_file_load;
 359 extern int force_ni;
 360 extern int pts_from_bps;
 361
 362 extern int extension_parsing;
 363
 364 int demux_info_add(demuxer_t *demuxer, const char *opt, const char *param);
 365 char* demux_info_get(demuxer_t *demuxer, const char *opt);
 366 int demux_info_print(demuxer_t *demuxer);
 367 int demux_control(demuxer_t *demuxer, int cmd, void *arg);
 368
 369 #ifdef HAVE_OGGVORBIS
 370 /* Found in demux_ogg.c */
 371 int demux_ogg_num_subs(demuxer_t *demuxer);
 372 int demux_ogg_sub_id(demuxer_t *demuxer, int index);
 373 const char *demux_ogg_sub_lang(demuxer_t *demuxer, int index);
 374 #endif
 375
 376 extern int demuxer_get_current_time(demuxer_t *demuxer);
 377 extern double demuxer_get_time_length(demuxer_t *demuxer);
 378 extern int demuxer_get_percent_pos(demuxer_t *demuxer);
 379 extern int demuxer_switch_audio(demuxer_t *demuxer, int index);
 380 extern int demuxer_switch_video(demuxer_t *demuxer, int index);
 381
 382 extern int demuxer_type_by_filename(char* filename);
 383
 384 extern void demuxer_help(void);
 385 extern int get_demuxer_type_from_name(char *demuxer_name, int *force);
 386
 387 int demuxer_add_chapter(demuxer_t* demuxer, const char* name, uint64_t start, uint64_t end);
 388 int demuxer_seek_chapter(demuxer_t *demuxer, int chapter, int mode, float *seek_pts, int *num_chapters, char **chapter_name);
 389
 390 /// Get current chapter index if available.
 391 int demuxer_get_current_chapter(demuxer_t *demuxer);
 392 /// Get chapter name by index if available.
 393 char *demuxer_chapter_name(demuxer_t *demuxer, int chapter);
 394 /// Get chapter display name by index.
 395 char *demuxer_chapter_display_name(demuxer_t *demuxer, int chapter);
 396 /// Get chapter start time and end time by index if available.
 397 float demuxer_chapter_time(demuxer_t *demuxer, int chapter, float *end);
 398 /// Get total chapter number.
 399 int demuxer_chapter_count(demuxer_t *demuxer);
 400
 401 #endif /* DEMUXER_H */