/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            mov_encoder_thread.cc
 *
 *  Tue May 17 16:00:01 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 <config.h>
#include "mov_encoder_thread.h"
#include <errno.h>
#include "miav_config.h"

MovEncoderThread::MovEncoderThread(const char *cpr, Info *i)
{
  info = i;
  info->info("MovEncoderThread");

  // Queues
  inputqueue = new FrameVectorQueue();
  video_outputqueue = new FramePriorityQueue();
  audio_outputqueue = new FramePriorityQueue();

  // Queue mutexes
  pthread_mutex_init (&input_mutex, NULL);
  pthread_mutex_init (&video_output_mutex, NULL);
  pthread_mutex_init (&audio_output_mutex, NULL);

  block = new FrameVector();

  num_frames_in_block = config->readString("frame_sequence")->length();

  info->info("Frame sequence length %d", num_frames_in_block);

  threads = config->readInt("encoding_threads");

  // Thread stuff
	sem_init(&in_sem, 0, 0);
	sem_init(&video_out_sem, 0, 0);
	sem_init(&audio_out_sem, 0, 0);
	sem_init(&read_sem, 0, 0);
  
  for(int cnt = 0; cnt < threads; cnt++) sem_post(&read_sem);

  writer = new MovEncoderWriter(cpr,
                                video_outputqueue, &video_output_mutex, &video_out_sem,
                                audio_outputqueue, &audio_output_mutex, &audio_out_sem,
                                info);
  writer->run();

  for(int cnt = 0; cnt < threads; cnt++) {
    MovEncoder *movenc = new MovEncoder(&read_sem,
                                  inputqueue, &in_sem, &input_mutex,
                                  video_outputqueue, &video_output_mutex, &video_out_sem,
                                  audio_outputqueue, &audio_output_mutex, &audio_out_sem,
                                  info);
    movenc->run();
    encs.push_back(movenc);
  }

  frame_number = 0;
}

MovEncoderThread::~MovEncoderThread()
{
  info->info("~MovEncoderThread");

  // These should not be deleted here... its done elsewhere.
  //  inputqueue = NULL;

  sem_post(&video_out_sem);
  sem_post(&audio_out_sem);

  // Tell the encoding threads to stop.
  for(int cnt = 0; cnt < threads; cnt++) {
    encs[cnt]->running = false;
  }

  // Kick them to initiate the exit.
  for(int cnt = 0; cnt < threads; cnt++) {
    sem_post(&in_sem);
  }

  // They should be exited now, so we can delete them.
  for(int cnt = 0; cnt < threads; cnt++) {
    // Wait for it to stop
    encs[cnt]->wait_stop();
    // Delete it
    delete encs[cnt];
  }

  // Tell the writer to stop
  writer->running = false;

  // Kick it to make it stop.
  sem_post(&video_out_sem);
  sem_post(&audio_out_sem);

  // Wait for it to stop.
  writer->wait_stop();

  // delete the writer (end thereby close the file)
  delete writer;

  // Destroy the semaphores.
  sem_destroy(&in_sem);
  sem_destroy(&video_out_sem);
  sem_destroy(&audio_out_sem);
  sem_destroy(&read_sem);
}

void MovEncoderThread::encode(Frame* frame)
{
  if(frame == NULL) {
    info->info("MovEncoderThread::encode - NULL frame detected.");
    // Terminate
    return;
  }

  frame->number = frame_number;
  block->push_back(frame);

  // Switch frame
  if(block->size() == num_frames_in_block) {
    // Wait until a free encoder.
    /*
    int val;
    sem_getvalue(&read_sem, &val);
    fprintf(stderr, "Sem Value: %d\n", val); fflush(stderr);
    */
    sem_wait(&read_sem);

    // Lock input mutex
    pthread_mutex_lock(&input_mutex);
    inputqueue->push(block);
    pthread_mutex_unlock(&input_mutex);
    // Unlock input mutex

    //    fprintf(stderr, "Frame vector [%d-%d] pushed\n", 
    //           block->at(0)->number, 
    //            block->at(block->size() - 1)->number);
    fflush(stderr);

    // Kick encoders
    sem_post(&in_sem);

    // Start new block
    block = new FrameVector;
  }

  frame_number ++;
}