stream/stream_rtp.c

   1 /*
   2  *  Copyright (C) 2006 Benjamin Zores
   3  *   Stream layer for MPEG over RTP, based on previous work from Dave Chapman
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software Foundation,
  17  *  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18  */
  19
  20 #include "config.h"
  21
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "stream.h"
  26 #include "url.h"
  27 #include "udp.h"
  28 #include "rtp.h"
  29
  30 static int
  31 rtp_streaming_read (int fd, char *buffer,
  32                     int size, streaming_ctrl_t *streaming_ctrl)
  33 {
  34   return read_rtp_from_server (fd, buffer, size);
  35 }
  36
  37 static int
  38 rtp_streaming_start (stream_t *stream)
  39 {
  40   streaming_ctrl_t *streaming_ctrl;
  41   int fd;
  42
  43   if (!stream)
  44     return -1;
  45
  46   streaming_ctrl = stream->streaming_ctrl;
  47   fd = stream->fd;
  48
  49   if (fd < 0)
  50   {
  51     fd = udp_open_socket (streaming_ctrl->url);
  52     if (fd < 0)
  53       return -1;
  54     stream->fd = fd;
  55   }
  56
  57   streaming_ctrl->streaming_read = rtp_streaming_read;
  58   streaming_ctrl->streaming_seek = nop_streaming_seek;
  59   streaming_ctrl->prebuffer_size = 64 * 1024; /* 64 KBytes */
  60   streaming_ctrl->buffering = 0;
  61   streaming_ctrl->status = streaming_playing_e;
  62
  63   return 0;
  64 }
  65
  66 static int
  67 rtp_stream_open (stream_t *stream, int mode, void *opts, int *file_format)
  68 {
  69   URL_t *url;
  70   extern int network_bandwidth;
  71
  72   mp_msg (MSGT_OPEN, MSGL_INFO, "STREAM_RTP, URL: %s\n", stream->url);
  73   stream->streaming_ctrl = streaming_ctrl_new ();
  74   if (!stream->streaming_ctrl)
  75     return STREAM_ERROR;
  76
  77   stream->streaming_ctrl->bandwidth = network_bandwidth;
  78   url = url_new (stream->url);
  79   stream->streaming_ctrl->url = check4proxies (url);
  80
  81   if (url->port == 0)
  82   {
  83     mp_msg (MSGT_NETWORK, MSGL_ERR,
  84             "You must enter a port number for RTP streams!\n");
  85     streaming_ctrl_free (stream->streaming_ctrl);
  86     stream->streaming_ctrl = NULL;
  87
  88     return STREAM_UNSUPPORTED;
  89   }
  90
  91   if (rtp_streaming_start (stream) < 0)
  92   {
  93     mp_msg (MSGT_NETWORK, MSGL_ERR, "rtp_streaming_start failed\n");
  94     streaming_ctrl_free (stream->streaming_ctrl);
  95     stream->streaming_ctrl = NULL;
  96
  97     return STREAM_UNSUPPORTED;
  98   }
  99
 100   stream->type = STREAMTYPE_STREAM;
 101   fixup_network_stream_cache (stream);
 102
 103   return STREAM_OK;
 104 }
 105
 106 const stream_info_t stream_info_rtp = {
 107   "MPEG over RTP streaming",
 108   "rtp",
 109   "Dave Chapman, Benjamin Zores",
 110   "native rtp support",
 111   rtp_stream_open,
 112   { "rtp", NULL},
 113   NULL,
 114   0 // Urls are an option string
 115 };