path: root/src/player.cc

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            plsyer.cc
 *
 *  Wed Nov  3 21:23:14 CET 2004
 *  Copyright  2004 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 <config.h>
#ifdef USE_GUI

#include "player.h"

// Use libdv
#include <libdv/dv.h>
#include <libdv/dv_types.h>

#include <time.h>

// For sleep
#include <unistd.h>

Player::Player(Info *ginfo,
               int w, int h,
               volatile int *grunning,
               sem_t	*gsem,
               Queue<Frame> *gqueue,
               pthread_mutex_t *gmutex)
{
  // No errors has ocurred... yet!
  noErrors = true;
  
  yuv_draw = new YUVDraw();

  width = w;
  height = h;

  info = ginfo;

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

 	sem_init(&play_sem, 0, 1);

  initSDL();

  bypass = false;

  // Do not show the text
  showtext = false;
  recording = true;
  recording_prev = !recording;
  cprchanged = false;
}

Player::~Player()
{
  deinitSDL();
  if(yuv_draw) delete yuv_draw;
}

void Player::reinitSDL()
{
  deinitSDL();
  initSDL();
}

void Player::deinitSDL()
{
  SDL_FreeYUVOverlay(overlay);
  SDL_Quit();
}

void Player::initSDL()
{
  if(SDL_Init(SDL_INIT_VIDEO) < 0) {
    info->error("Unable to init SDL: %s.", SDL_GetError());
    noErrors = false;
    printf("failed!\n");
    return;
  }

  screen = SDL_SetVideoMode(width, 
                            height, 
                            0, // 0 bpp means 'use current display depth' 
                            SDL_HWSURFACE | 
                            SDL_ANYFORMAT | 
                            SDL_HWACCEL );

  if(!screen) {
    info->error("Unable to set %dx%d video: %s.", 
            720, 576, SDL_GetError());
    noErrors = false;
    printf("failed!\n");
    return;
  }

  overlay = SDL_CreateYUVOverlay(720,
                                 576,
                                 SDL_YUY2_OVERLAY, // Match for the libdv decoder output
                                 screen);
  if(!overlay) {
    info->error("Unable to create SDL overlay: %s.", SDL_GetError());
    noErrors = false;
    printf("failed!\n");
    return;
  }

  // Setup the displayarea.
  rect.x = 0;
  rect.y = 0;
  rect.w = width;
  rect.h = height;

  yuv_draw->setOverlay(overlay);
}

void Player::player()
{
  SDL_Event event;
  Frame *frame;

  int pitches[3];

  if(!noErrors) return; // FIXME: Gracefully exit...

  bool first = true;
	dv_decoder_t *decoder = dv_decoder_new(FALSE/*this value is unused*/, FALSE, FALSE);
  decoder->quality = DV_QUALITY_BEST;

  while(*running) {
    // Wait for the semaphore to be free... then run
    sem_wait(&play_sem);
    sem_post(&play_sem);

    if(bypass) continue;

    if(!SDL_WaitEvent(&event)) break; // FIXME: Gracefully exit... 

    switch(event.type) {
    case SDL_KEYDOWN:
      switch(event.key.keysym.sym) {
      case SDLK_q:
      case SDLK_ESCAPE:
        goto quitit;
      default:
        break;
      }
      break;
      
    case SDL_USEREVENT:
      frame = queue->pop();
      if(!frame) break;
      
      if(first) {
        pitches[0] = overlay->pitches[0];
        pitches[1] = overlay->pitches[1];
        pitches[2] = overlay->pitches[2];

        dv_parse_header(decoder, frame->data);
        //dv_parse_packs(decoder, frame->data); // Not needed anyway!

        decoder->system = e_dv_system_625_50;  // PAL lines, PAL framerate
        decoder->sampling = e_dv_sample_422;  // 4 bytes y, 2 bytes u, 2 bytes v
        decoder->std = e_dv_std_iec_61834;
        decoder->num_dif_seqs = 12;
        first = false;
      }
      
      if(SDL_LockYUVOverlay(overlay) == -1) info->error("SDL_LockYUVOverlay failed.");

      // libdv img decode to yuv
			dv_decode_full_frame(decoder, 
                           frame->data, 
                           e_dv_color_yuv, 
                           overlay->pixels,
                           pitches);

      if(showtext) {
        if(cprchanged) {
          yuv_draw->setBottomText(cpr);
          cprchanged = false;
        }
        if(recording != recording_prev) {
          if(recording) yuv_draw->setTopText("Recording");
          else yuv_draw->setTopText("Stopped");
          recording_prev = recording;
        }
        yuv_draw->draw();
      }

      SDL_UnlockYUVOverlay(overlay);
      SDL_DisplayYUVOverlay(overlay, &rect);
      delete frame;
      break;
      
    case SDL_QUIT:
    quitit:
      *running = 0;
      break;

    default:
      break;
    }
  }
  if(decoder) dv_decoder_free(decoder);

  struct timespec ts;

  /* Remove any late buffer */
  /* We don't care, the encoder finishes them all */
  ts.tv_sec = 0;
  ts.tv_nsec = 100000000L;	// 100ms
  nanosleep(&ts, NULL);

  frame = queue->pop();
  if(frame) delete frame;
}

void Player::thread_main()
{
  player();
  fprintf(stderr, "Player thread stopped.\n"); fflush(stderr);
}

void Player::start()
{
  sem_post(&play_sem);
}

void Player::stop()
{
  sem_wait(&play_sem);
}

// FIXME: Worst case genario: the loop takes more than 1 second
//        to stop displaying => crash, due to deinitialization 
//        of SDL, while calling it.!
void Player::resize(int w, int h, bool s)
{
  // Tell loop to stop
  bypass = true;

  // Wait to ensure the current frame is done being displayed
  sleep(1);
  
  // Deinitialize SDL
  deinitSDL();

  // Set new size
  width = w;
  height = h;

  // Initialize SDL
  initSDL();

  // Tell loop to go on.
  bypass = false;

  showtext = s;
}

void Player::setCpr(char *newcpr, char* name)
{
  sprintf(cpr, "ID: %s  - %s", newcpr, name);
  cprchanged = true;
}

void Player::startrecord()
{
  recording = true;
}

void Player::stoprecord()
{
  recording = false;
}

#endif /* USE_GUI */