vorbis-tools/oggenc/skeleton.h

   1 /*
   2  * skeleton.h
   3  * author: Tahseen Mohammad
   4  */
   5
   6 #ifndef _SKELETON_H
   7 #define _SKELETON_H
   8
   9 #ifdef __cplusplus
  10 extern "C" {
  11 #endif
  12
  13 #include <ogg/ogg.h>
  14
  15 #define SKELETON_VERSION_MAJOR 3
  16 #define SKELETON_VERSION_MINOR 0
  17 #define FISHEAD_IDENTIFIER "fishead\0"
  18 #define FISBONE_IDENTIFIER "fisbone\0"
  19 #define FISHEAD_SIZE 64
  20 #define FISBONE_SIZE 52
  21 #define FISBONE_MESSAGE_HEADER_OFFSET 44
  22
  23 /* fishead_packet holds a fishead header packet. */
  24 typedef struct {
  25     /* Start time of the presentation.
  26      * For a new stream presentationtime & basetime is same. */
  27     ogg_int64_t ptime_n;                                    /* presentation time numerator */
  28     ogg_int64_t ptime_d;                                    /* presentation time denominator */
  29     ogg_int64_t btime_n;                                    /* basetime numerator */
  30     ogg_int64_t btime_d;                                    /* basetime denominator */
  31     /* will holds the time of origin of the stream, a 20 bit field. */
  32     unsigned char UTC[20];
  33 } fishead_packet;
  34
  35 /* fisbone_packet holds a fisbone header packet. */
  36 typedef struct {
  37     ogg_uint32_t serial_no;                                 /* serial no of the corresponding stream */
  38     ogg_uint32_t nr_header_packet;                      /* number of header packets */
  39     /* granule rate is the temporal resolution of the logical bitstream */
  40     ogg_int64_t granule_rate_n;                            /* granule rate numerator */
  41     ogg_int64_t granule_rate_d;                            /* granule rate denominator */
  42     ogg_int64_t start_granule;                             /* start granule value */
  43     ogg_uint32_t preroll;                                   /* preroll */
  44     unsigned char granule_shift;                            /* 1 byte value holding the granule shift */
  45     char *message_header_fields;                            /* holds all the message header fields */
  46     /* current total size of the message header fields, for realloc purpose, initially zero */
  47     ogg_uint32_t current_header_size;
  48 } fisbone_packet;
  49
  50 extern int add_message_header_field(fisbone_packet *fp, char *header_key, char *header_value);
  51 /* remember to deallocate the returned ogg_packet properly */
  52 extern int ogg_from_fishead(fishead_packet *fp,ogg_packet *op);
  53 extern int ogg_from_fisbone(fisbone_packet *fp,ogg_packet *op);
  54 extern int add_fishead_to_stream(ogg_stream_state *os, fishead_packet *fp);
  55 extern int add_fisbone_to_stream(ogg_stream_state *os, fisbone_packet *fp);
  56 extern int add_eos_packet_to_stream(ogg_stream_state *os);
  57 extern int flush_ogg_stream_to_file(ogg_stream_state *os, FILE *out);
  58
  59 #ifdef __cplusplus
  60 }
  61 #endif
  62
  63 #endif  /* _SKELETON_H */