/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            mov_encoder_writer.cc
 *
 *  Sun May 22 12:51:36 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.
 */

/*
 * $Id$
 */

/*
 * $Log$
 * Revision 1.1  2005/05/22 15:49:22  deva
 * Added multithreaded encoding support.
 *
 */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#include <pthread.h>
#include <semaphore.h>

#include <errno.h>

#include <config.h>
#include "mov_encoder_writer.h"

MovEncoderWriter::MovEncoderWriter(const char* filename, FramePriorityQueue *q, sem_t *s, pthread_mutex_t *m)
{
  file = open(filename, 
              O_CREAT | O_WRONLY, //| O_LARGEFILE
              S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
  if(file == -1) {
    fprintf(stderr, "Could not open file for writing: %s\n", strerror(errno));
    return;
  }

  sem = s;
  queue = q;
  frame_number = 0;
  mutex = m;

  running = true;
}

MovEncoderWriter::~MovEncoderWriter()
{
  if(file != -1) close(file);
}

void MovEncoderWriter::run()
{
  fprintf(stderr, "\t\t\t\t\t\t\t\t\tFile Writer ready!\n"); fflush(stderr);

  Frame *frame;

  if(file == -1) return;

  while(running) {
    sem_wait(sem);

    if(queue->size() == 0) continue;

    pthread_mutex_lock(mutex);
    frame = queue->top();
    if(frame->number == frame_number) queue->pop();
    pthread_mutex_unlock(mutex);

    /*
    if(!frame) {
      fprintf(stderr, "\t\t\t\t\t\t\t\t\tNULL frame detected");
      continue;
    }
    */

    fprintf(stderr, "\t\t\t\t\t\t\t\t\tChecking frame [%d] against expected [%d]\n", 
            frame->number, frame_number); fflush(stderr);
    while(frame->number == frame_number) {

      write(file, frame->data, frame->size);
      delete frame;
      
      fprintf(stderr, "\t\t\t\t\t\t\t\t\tWrite frame [%d]\n", frame->number); fflush(stderr);

      frame_number++;

      pthread_mutex_lock(mutex);
      frame = queue->top();
      if(frame->number == frame_number) queue->pop();
      pthread_mutex_unlock(mutex);
    
    }
  }
}