/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            dv1394.cc
 *
 *  Tue Apr 19 12:10:34 CEST 2005
 *  Copyright  2005 Bent Bisballe
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *    This file is part of MIaV.
 *
 *    MIaV 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.
 *
 *    MIaV 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 MIaV; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include "dv1394.h"

#include <stdlib.h>
#include <memory.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/poll.h>

#include "dv.h"

static int write_frame(unsigned char *data, int len, int complete,
                       void *callback_data)
{
  class dv1394 *dv = (class dv1394*)callback_data;

  if (complete == 0) {
    fprintf (stderr, "Error: incomplete frame received!\n");
    return 0;
  }
  //return (fwrite (data, len, 1, f) < 1) ? -1 : 0;
  unsigned char *ptr = (unsigned char *)malloc(len);
  memcpy(ptr, data, len);

  dv->ptr = ptr;

  return 1;
}

dv1394::dv1394(Info *i, int p, int c)
{
  //printf("dv1394::dv1394()\n");
  info = i;
  port = p;
  channel = c;
}

dv1394::~dv1394()
{
  //  printf("dv1394::~dv1394()\n");
  iec61883_dv_fb_close (frame);
  // Close firewire connection.
  if(handle) raw1394_destroy_handle (handle);
}

bool dv1394::connect()
{
  //printf("dv1394::connect()\n");

  handle = raw1394_new_handle_on_port(port);
  //printf("   handle: %p\n", handle);

  frame = iec61883_dv_fb_init(handle, write_frame, this);
  //printf("   frame: %p\n", frame);

  if(frame && iec61883_dv_fb_start(frame, channel) == 0) {
    // ok
    //printf("frame ok\n");
  } else {
    // fail
    //printf("frame fail\n");
    return false;
  }

  return true;
}

unsigned char *dv1394::readFrame()
{
  struct pollfd pfd;
  pfd.fd = raw1394_get_fd(handle);
  pfd.events = POLLIN | POLLPRI;
  pfd.revents = 0;

  ptr = NULL;

  while(ptr == NULL) {
    if(poll (&pfd, 1, 50) > 0 && (pfd.revents & POLLIN)) {
      raw1394_loop_iterate(handle);
    }
  }

  return ptr;
}