vss.h

   1 /*
   2  * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file vss.h Exported functions from vss.c (para_server). */
   8
   9 void init_vss_task(int afs_socket);
  10 unsigned int vss_playing(void);
  11 unsigned int vss_next(void);
  12 unsigned int vss_repos(void);
  13 unsigned int vss_paused(void);
  14 unsigned int vss_stopped(void);
  15 struct timeval *vss_chunk_time(void);
  16 const char *supported_audio_formats(void);
  17
  18 /** Stop playing after current audio file. */
  19 #define VSS_NOMORE 1
  20 /** Skip remaining part of current audio file. */
  21 #define VSS_NEXT 2
  22 /** A reposition request was sent by a client. */
  23 #define VSS_REPOS 4
  24 /** Currently playing. */
  25 #define VSS_PLAYING 8
  26
  27 /**
  28  * Each paraslash sender may register arbitrary many clients to the virtual
  29  * streaming system, possibly with varying fec parameters. In order to do so,
  30  * it must allocate a \a fec_client_parms structure and pass it to \ref
  31  * add_fec_client.
  32  *
  33  * Clients are automatically removed from that list by the vss if an error
  34  * occurs, or if the sender requests deletion of a client by calling \ref
  35  * vss_del_fec_client().
  36  */
  37 struct fec_client;
  38
  39 /** FEC parameters requested by FEC clients. */
  40 struct fec_client_parms {
  41         /** Number of data slices plus redundant slices. */
  42         uint8_t slices_per_group;
  43         /** Number of slices minus number of redundant slices. */
  44         uint8_t data_slices_per_group;
  45         /** Maximal number of bytes per slice. */
  46         uint16_t max_slice_bytes;
  47         /** Called by vss.c when the next slice should be sent. */
  48         int (*send)(char *buf, size_t num_bytes, void *private_data);
  49         /** Passed verbatim to \a send(). */
  50         void *private_data;
  51 };
  52
  53 int vss_add_fec_client(struct fec_client_parms *fcp, struct fec_client **result);
  54 void vss_del_fec_client(struct fec_client *fc);
  55 size_t vss_get_fec_eof_packet(const char **buf);