grab_client.h

   1 /*
   2  * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file grab_client.h exported symbols from grab_client.c */
   8
   9 #include "config.h"
  10
  11 /**
  12  * How to handle blocking writes for the grab client fds.
  13  */
  14 enum grab_mode {
  15         /** Ignore the data and do not write. */
  16         GM_SLOPPY,
  17         /** Write anyway (default). */
  18         GM_AGGRESSIVE,
  19         /** Close fd if write would block. */
  20         GM_PEDANTIC,
  21 };
  22
  23 /** Flags specified as arguments to the grab command. */
  24 enum grab_flags {
  25         /** Grab the filter input instead of its output. */
  26         GF_INPUT_GRAB = 1,
  27         /** Stop grabbing if audio file changes. */
  28         GF_ONE_SHOT = 2,
  29 };
  30
  31 /**
  32  * Describes one active grab client.
  33  *
  34  * \sa filter_callback, filter_node::callbacks.
  35  */
  36 struct grab_client {
  37         /** The file descriptor to send the grabbed stream to. */
  38         int fd;
  39         /** Non-zero if the write() to \a fd failed. */
  40         int error;
  41         /** See \ref grab_mode. */
  42         enum grab_mode mode;
  43         /** Point of filter chain to grab. */
  44         int32_t filter_num;
  45         /** The number of the desired audio format. */
  46         int audio_format_num;
  47         /** Flags given at the command line. */
  48         enum grab_flags flags;
  49         /** The callback data which gets attached to a suitable filter_node. */
  50         struct filter_callback fcb;
  51         /** All grab clients belong either to a filter node or to the inactive list. */
  52         struct list_head node;
  53 };
  54
  55 int grab_client_new(int fd, int argc, char **argv);
  56 void activate_inactive_grab_clients(int audio_format_num,
  57                 struct filter_chain *fc);
  58 void activate_grab_client(struct grab_client *gc, struct filter_node *fn);
  59 void init_grabbing(void);