/* 
 * Copyright (C) 2000-2001 the xine project
 * 
 * This file is part of xine, a unix video player.
 * 
 * xine 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.
 * 
 * xine 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
 *
 * $Id: input_stdin_fifo.c,v 1.12 2001/09/08 00:44:40 guenter Exp $
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <errno.h>

#if defined(__linux__)
#include <linux/config.h> /* Check for DEVFS */
#endif

#include "xine_internal.h"
#include "monitor.h"
#include "input_plugin.h"

static uint32_t xine_debug;

typedef struct {
  input_plugin_t   input_plugin;
  
  int              fh;
  char            *mrl;
  config_values_t *config;
  off_t            curpos;

} stdin_input_plugin_t;

/*
 *
 */
static int stdin_plugin_open(input_plugin_t *this_gen, char *mrl) {
  stdin_input_plugin_t *this = (stdin_input_plugin_t *) this_gen;
  char *filename;
  char *pfn;

  this->mrl = mrl;

  if(!strncasecmp(mrl, "stdin:", 6) 
      || !strncmp(mrl, "-", 1)) {
#if defined(CONFIG_DEVFS_FS)
    filename = "/dev/vc/stdin";
#else
    filename = "/dev/stdin";
#endif
  } 
  else if(!strncasecmp(mrl, "fifo:", 5)) {
    if((pfn = strrchr((mrl+5), ':')) != NULL) {
      filename = ++pfn;
    }
    else {
      if(!(strncasecmp(mrl+5, "//mpeg1", 7))
	 || (!(strncasecmp(mrl+5, "//mpeg2", 7)))) {
	filename = (char *) &mrl[12];
      }
      else {
	filename = (char *) &mrl[5];
      }
    }
  } 
  else {
    /* filename = (char *) mrl; */
    return 0;
  }
  
  xprintf (VERBOSE|INPUT, "Opening >%s<\n",filename);

  this->fh = open (filename, O_RDONLY);
  this->curpos = 0;
  
  if(this->fh == -1) {
    return 0;
  }

  return 1;
}

/*
 *
 */
static off_t stdin_plugin_read (input_plugin_t *this_gen, 
				char *buf, off_t todo) {

  stdin_input_plugin_t  *this = (stdin_input_plugin_t *) this_gen;
  off_t                  num_bytes, total_bytes;

  total_bytes = 0;

  while (total_bytes < todo) {
    num_bytes = read (this->fh, &buf[total_bytes], todo - total_bytes);

    if(num_bytes < 0) {
      this->curpos += num_bytes;
      return num_bytes;
    }
    else if (!num_bytes) {
      this->curpos += total_bytes;
      return total_bytes;
    }
    total_bytes += num_bytes;
  }

  this->curpos += total_bytes;

  return total_bytes;
}

/*
 *
 */
static buf_element_t *stdin_plugin_read_block (input_plugin_t *this_gen, fifo_buffer_t *fifo, off_t todo) {

  off_t                 num_bytes, total_bytes;
  stdin_input_plugin_t  *this = (stdin_input_plugin_t *) this_gen;
  buf_element_t        *buf = fifo->buffer_pool_alloc (fifo);

  buf->content = buf->mem;
  buf->type = BUF_DEMUX_BLOCK;
  total_bytes = 0;

  while (total_bytes < todo) {
    num_bytes = read (this->fh, buf->mem + total_bytes, todo-total_bytes);
    total_bytes += num_bytes;
    this->curpos += num_bytes;
    if (!num_bytes) {
      buf->free_buffer (buf);
      return NULL;
    }
  }

  buf->size = total_bytes;

  return buf;
}

/*
 *
 */
static off_t stdin_plugin_get_length(input_plugin_t *this_gen) {

  return 0;
}

/*
 *
 */
static uint32_t stdin_plugin_get_capabilities(input_plugin_t *this_gen) {
  
  return INPUT_CAP_NOCAP;
}

/*
 *
 */
static uint32_t stdin_plugin_get_blocksize(input_plugin_t *this_gen) {

  return 0;
}

/*
 *
 */
static off_t stdin_plugin_get_current_pos (input_plugin_t *this_gen){
  stdin_input_plugin_t *this = (stdin_input_plugin_t *) this_gen;

  return this->curpos;
}

/*
 *
 */
static int stdin_plugin_eject_media(input_plugin_t *this_gen) {
  return 1;
}

/*
 *
 */
static char* stdin_plugin_get_mrl (input_plugin_t *this_gen) {
  stdin_input_plugin_t *this = (stdin_input_plugin_t *) this_gen;

  return this->mrl;
}

/*
 *
 */
static void stdin_plugin_close(input_plugin_t *this_gen) {
  stdin_input_plugin_t *this = (stdin_input_plugin_t *) this_gen;

  close(this->fh);
  this->fh = -1;
}

/*
 *
 */
static void stdin_plugin_stop(input_plugin_t *this_gen) {
  stdin_plugin_close(this_gen);
}

/*
 *
 */
static char *stdin_plugin_get_description (input_plugin_t *this_gen) {
  return "stdin/fifo input plugin as shipped with xine";
}

/*
 *
 */
static char *stdin_plugin_get_identifier(input_plugin_t *this_gen) {
  return "stdin_fifo";
}

/*
 *
 */
static int stdin_plugin_get_optional_data (input_plugin_t *this_gen, 
					   void *data, int data_type) {

  return INPUT_OPTIONAL_UNSUPPORTED;
}

/*
 *
 */
input_plugin_t *init_input_plugin (int iface, config_values_t *config) {

  stdin_input_plugin_t *this;

  xine_debug = config->lookup_int (config, "xine_debug", 0);

  if (iface != 3) {
    printf("rtp input plugin doesn't support plugin API version %d.\n"
	   "PLUGIN DISABLED.\n"
	   "This means there's a version mismatch between xine and this input"
	   "plugin.\nInstalling current input plugins should help.\n",
	   iface);
    return NULL;
  }

  this = (stdin_input_plugin_t *) xmalloc(sizeof(stdin_input_plugin_t));
  
  this->input_plugin.interface_version = INPUT_PLUGIN_IFACE_VERSION;
  this->input_plugin.get_capabilities  = stdin_plugin_get_capabilities;
  this->input_plugin.open              = stdin_plugin_open;
  this->input_plugin.read              = stdin_plugin_read;
  this->input_plugin.read_block        = stdin_plugin_read_block;
  this->input_plugin.seek              = NULL;
  this->input_plugin.get_current_pos   = stdin_plugin_get_current_pos;
  this->input_plugin.get_length        = stdin_plugin_get_length;
  this->input_plugin.get_blocksize     = stdin_plugin_get_blocksize;
  this->input_plugin.get_dir           = NULL;
  this->input_plugin.eject_media       = stdin_plugin_eject_media;
  this->input_plugin.get_mrl           = stdin_plugin_get_mrl;
  this->input_plugin.close             = stdin_plugin_close;
  this->input_plugin.stop              = stdin_plugin_stop;
  this->input_plugin.get_description   = stdin_plugin_get_description;
  this->input_plugin.get_identifier    = stdin_plugin_get_identifier;
  this->input_plugin.get_autoplay_list = NULL;
  this->input_plugin.get_optional_data = stdin_plugin_get_optional_data;
  this->input_plugin.handle_input_event= NULL;
  this->input_plugin.is_branch_possible= NULL;

  this->fh      = -1;
  this->mrl     = NULL;
  this->config  = config;
  this->curpos  = 0;
  
  return (input_plugin_t *) this;
}