mpv/stream/stream_udp.c

/*
 *  Copyright (C) 2006 Benjamin Zores
 *   Stream layer for MPEG over UDP, based on previous work from Dave Chapman
 *
 *   This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software Foundation,
 *  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "config.h"

#include <stdlib.h>
#include <string.h>

#include "stream.h"
#include "url.h"
#include "udp.h"

static int
udp_streaming_start (stream_t *stream)
{
  streaming_ctrl_t *streaming_ctrl;
  int fd;

  if (!stream)
    return -1;

  streaming_ctrl = stream->streaming_ctrl;
  fd = stream->fd;
	
  if (fd < 0)
  {
    fd = udp_open_socket (streaming_ctrl->url); 
    if (fd < 0)
      return -1;
    stream->fd = fd;
  }

  streaming_ctrl->streaming_read = nop_streaming_read;
  streaming_ctrl->streaming_seek = nop_streaming_seek;
  streaming_ctrl->prebuffer_size = 64 * 1024; /* 64 KBytes */
  streaming_ctrl->buffering = 0;
  streaming_ctrl->status = streaming_playing_e;
  
  return 0;
}

static int
udp_stream_open (stream_t *stream, int mode, void *opts, int *file_format)
{
  URL_t *url;
  extern int network_bandwidth;
  
  mp_msg (MSGT_OPEN, MSGL_INFO, "STREAM_UDP, URL: %s\n", stream->url);
  stream->streaming_ctrl = streaming_ctrl_new ();
  if (!stream->streaming_ctrl)
    return STREAM_ERROR;

  stream->streaming_ctrl->bandwidth = network_bandwidth;
  url = url_new (stream->url);
  stream->streaming_ctrl->url = check4proxies (url);

  if (url->port == 0)
  {
    mp_msg (MSGT_NETWORK, MSGL_ERR,
            "You must enter a port number for UDP streams!\n");
    streaming_ctrl_free (stream->streaming_ctrl);
    stream->streaming_ctrl = NULL;
  
    return STREAM_UNSUPPORTED;
  }

  if (udp_streaming_start (stream) < 0)
  {
    mp_msg (MSGT_NETWORK, MSGL_ERR, "udp_streaming_start failed\n");
    streaming_ctrl_free (stream->streaming_ctrl);
    stream->streaming_ctrl = NULL;
  
    return STREAM_UNSUPPORTED;
  }

  stream->type = STREAMTYPE_STREAM;
  fixup_network_stream_cache (stream);
  
  return STREAM_OK;
}

const stream_info_t stream_info_udp = {
  "MPEG over UDP streaming",
  "udp",
  "Dave Chapman, Benjamin Zores",
  "native udp support",
  udp_stream_open,
  { "udp", NULL},
  NULL,
  0 // Urls are an option string
};