path: root/src/encoder.cc

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

/*
 * Originally from:
 * RTVideoRec Realtime video recoder and encoder for Linux
 *
 * Copyright (C) 2004  B. Stultiens
 * Copyright (C) 2004  Koen Otter and Glenn van der Meyden
 */

/*
 *    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 "encoder.h"

#include "util.h"

Encoder::Encoder(Info *ginfo,
                 const char *gip,
                 const int gport,
                 sem_t	*gsem,
                 Queue<Frame> *gqueue,
                 pthread_mutex_t *gmutex,
                 volatile int *grunning)
{
  info = ginfo;

  strcpy(ip, gip);
  port = gport;
  memset(cpr, 0, sizeof(cpr));

  sem = gsem;
  queue = gqueue;
  mutex = gmutex;
  running = grunning;

  //  record = 0;

 	sem_init(&record_sem, 0, 0);

  s = NULL;
  n = NULL;

  frozen = false;

  savestate_sent = false;
  savestate = NO_CHANGE;

  //  shoot_request = 0;
  //  shoot_value = 0;
  //  freeze_request = 0;
  //  freeze_value = 0;
}


Encoder::~Encoder()
{
  // If a hanging connection exists, we better close it.
  /* // Already deleted in thread_main
  if(s) {
    if(n) delete n;
    delete s;
    s = NULL;
    n = NULL;
  }
  */
}


void Encoder::encode()
{ 
  Frame *frame;

  while(*running) {
    sem_wait(sem);

    frame = queue->pop();
    
    if(frame) {
      if(frame->freeze == 1) frozen = true;
      if(frame->freeze == -1) frozen = false;
      if(frame->shoot) frozen = false;

      if(frame->record || 
         (frame->freeze == 1) || 
         frame->shoot) {

        // If no connection is present, make a new one
        if(!s) {
          s = new Socket(port);
          s->sconnect(ip);
          n = new Network(s);
        }

        n_header h;
      
        if(savestate != NO_CHANGE) savestate_sent = true;

        h.header_type = DATA_HEADER;
        sprintf(h.header.h_data.cpr, "%s", cpr);
        h.header.h_data.freeze = frame->freeze;
        h.header.h_data.snapshot = frame->shoot;
        h.header.h_data.record = frame->record;
        h.header.h_data.savestate = savestate;//NO_CHANGE;
        h.header.h_data.mute = frame->mute;

        savestate = NO_CHANGE; // only transmit once!
        
        //        if(freeze_request != freeze_value) freeze_value = freeze_request;
        //        if(shoot_request != shoot_value) shoot_value = shoot_request;
        
        n->sendPackage(&h, frame->data, frame->size);
      } else {
        // When frozen we need to preserve the connection in order to
        // remember the frozen frame on the server side.
        if(!frozen) {
          // No data is to be sent, if we have a connection, destroy it.
          if(s) {
            if(n) delete n;
            delete s;
            s = NULL;
            n = NULL;
          }
        }
      }

      if(frame->shoot && !frozen && !frame->record) {
        // FIXME: This is ugly!
        // Bugfix... connection not cleared, when an 'unfrozen' snapshot is taken, 
        // and no recording is done.
        if(s) {
          if(n) delete n;
          delete s;
          s = NULL;
          n = NULL;
        }
      }

      if(frame) delete frame;
    }
  }
}


void Encoder::setCpr(char *newcpr)
{
  strcpy(cpr, newcpr);
}


void Encoder::freeze()
{ 
  /* 
  if(!s) {
    s = new Socket(port, errobj);
    s->sconnect(ip);
    n = new Network(s, errobj);
  }
  */
  //  if(!errobj->hasError()) freeze_request = 1 - freeze_request;
}


/*
 * shoot
 * Set the shoot bit in the network header on the current frame.
 * return the decodet (rgba) version af that frame, for thumbnail show.
 */
void Encoder::shoot()
{
  /*
  if(!s) {
    s = new Socket(port, errobj);
    s->sconnect(ip);
    n = new Network(s, errobj);
  }
  */
  //  if(!errobj->hasError()) shoot_request = 1 - shoot_request;
  //  getScreenshot(rgb);
}


void Encoder::thread_main()
{
  encode();
  if(s) {
    if(n) delete n;
    delete s;
    s = NULL;
    n = NULL;
  }
  fprintf(stderr, "Encoder thread stopped.\n"); fflush(stderr);
}


void Encoder::start()
{
  savestate = NO_CHANGE;
  savestate_sent = false;
  /*
  if(!s) {
    s = new Socket(port, errobj);
    s->sconnect(ip);
    n = new Network(s, errobj);
  }
  */
  //  if(!errobj->hasError()) record = 1;
}


void Encoder::stop(n_savestate save)
{
  savestate = save;
  // Don't return until we are sure the savestate has been sent.
  while(savestate_sent == false) {
    // Just wait a while (in a while!)
    sleep_0_2_frame();
  }
/*
  struct timespec ts;
  // TODO: set save state in package header.

  // Lock the queue and wait until all elements are sent on the network.
  queue->lock();
  fprintf(stderr, "Emptying queue"); fflush(stderr);
  while(queue->peek()) {
    // Remove any late buffer
    // We don't care, the encoder finishes them all
    ts.tv_sec = 0;
    ts.tv_nsec = 500000000L;	// 100ms
    fprintf(stderr, "."); fflush(stderr);
    nanosleep(&ts, NULL);
  }
  fprintf(stderr, "done!\n"); fflush(stderr);

  record = 0;

  queue->unlock();
*/
/*
  if(s) {
    if(n) delete n;
    delete s;
    s = NULL;
    n = NULL;
  }
*/
}