stream/stream_udp.c

   1 /*
   2  * stream layer for MPEG over UDP, based on previous work from Dave Chapman
   3  *
   4  * Copyright (C) 2006 Benjamin Zores
   5  *
   6  * This file is part of MPlayer.
   7  *
   8  * MPlayer is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * MPlayer is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include "config.h"
  24
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #include "stream.h"
  29 #include "url.h"
  30 #include "udp.h"
  31
  32 static int
  33 udp_streaming_start (stream_t *stream)
  34 {
  35   streaming_ctrl_t *streaming_ctrl;
  36   int fd;
  37
  38   if (!stream)
  39     return -1;
  40
  41   streaming_ctrl = stream->streaming_ctrl;
  42   fd = stream->fd;
  43
  44   if (fd < 0)
  45   {
  46     fd = udp_open_socket (streaming_ctrl->url);
  47     if (fd < 0)
  48       return -1;
  49     stream->fd = fd;
  50   }
  51
  52   streaming_ctrl->streaming_read = nop_streaming_read;
  53   streaming_ctrl->streaming_seek = nop_streaming_seek;
  54   streaming_ctrl->prebuffer_size = 64 * 1024; /* 64 KBytes */
  55   streaming_ctrl->buffering = 0;
  56   streaming_ctrl->status = streaming_playing_e;
  57
  58   return 0;
  59 }
  60
  61 static int
  62 udp_stream_open (stream_t *stream, int mode, void *opts, int *file_format)
  63 {
  64   URL_t *url;
  65   extern int network_bandwidth;
  66
  67   mp_msg (MSGT_OPEN, MSGL_INFO, "STREAM_UDP, URL: %s\n", stream->url);
  68   stream->streaming_ctrl = streaming_ctrl_new ();
  69   if (!stream->streaming_ctrl)
  70     return STREAM_ERROR;
  71
  72   stream->streaming_ctrl->bandwidth = network_bandwidth;
  73   url = url_new (stream->url);
  74   stream->streaming_ctrl->url = check4proxies (url);
  75
  76   if (url->port == 0)
  77   {
  78     mp_msg (MSGT_NETWORK, MSGL_ERR,
  79             "You must enter a port number for UDP streams!\n");
  80     streaming_ctrl_free (stream->streaming_ctrl);
  81     stream->streaming_ctrl = NULL;
  82
  83     return STREAM_UNSUPPORTED;
  84   }
  85
  86   if (udp_streaming_start (stream) < 0)
  87   {
  88     mp_msg (MSGT_NETWORK, MSGL_ERR, "udp_streaming_start failed\n");
  89     streaming_ctrl_free (stream->streaming_ctrl);
  90     stream->streaming_ctrl = NULL;
  91
  92     return STREAM_UNSUPPORTED;
  93   }
  94
  95   stream->type = STREAMTYPE_STREAM;
  96   fixup_network_stream_cache (stream);
  97
  98   return STREAM_OK;
  99 }
 100
 101 const stream_info_t stream_info_udp = {
 102   "MPEG over UDP streaming",
 103   "udp",
 104   "Dave Chapman, Benjamin Zores",
 105   "native udp support",
 106   udp_stream_open,
 107   { "udp", NULL},
 108   NULL,
 109   0 // Urls are an option string
 110 };