Song.c

/*
    Author: Reyes Vilchis Juan Jose
    Fecha: 10/12/2017
    Licencia:
    This file is part of ReproductorMusica.
    ReproductorMusica 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 3 of the License, or
    (at your option) any later version.

    Foobar 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 Foobar.  If not, see <http://www.gnu.org/licenses/>.*/
#include "Song.h"
#include <stdio.h>
/*La funcion "create_song recibe de parametro una ruta al a cual accedera VLC
para poder crear el mediaplayer y entonces reproducir la cancion"*/
Song* create_song(char* ruta){
  Song* s = (Song*)malloc(sizeof(Song));
  s->instance = libvlc_new(0,NULL);
  s->mediaPlayer = libvlc_media_player_new(s->instance);
  s->media = libvlc_media_new_location(s->instance,ruta);
  //Regresa apuntador a cancion
  return s;
}
/*Open media solo se hará cada que se reproduzca una nueva cancion,
en esta funcion se reproduce se establece el mediaplayer a reproducir y se reproduce.*/
void open_media(Song* s) {
    libvlc_media_player_set_media(s->mediaPlayer,s->media);
    libvlc_media_parse(s->media);
    play_song(s);
}
//"Play_song" recibe de parametros un apuntador a "Song" y la reproduce, primero se debe usar la funcion open media
void play_song(Song* s){
  libvlc_media_player_play(s->mediaPlayer);
}
//"pause_song" pausa una cancion, recibe de parametro apuntador a "Song", no olvidar usar antes open_media
void pause_song(Song* s){
  libvlc_media_player_pause(s->mediaPlayer);
}
//"stop_song" detiene totalmente la cancion.
void stop_song(Song* s){
  libvlc_media_player_stop(s->mediaPlayer);
}
//on_playpause sirve para pausar o detener una cancion,
void on_playpause(Song* s) {
    if(libvlc_media_player_is_playing(s->mediaPlayer) == 1) {//Si se esta reproduciendo
        pause_song(s);//Pausa la cancion
    }
    else {//Si no se esta reproduciendo
      if(libvlc_media_player_get_length(s->mediaPlayer)==-1){//Si el tamaño del player es -1 significa que no hay media agregada
        open_media(s);//Agregamos y reproducimos
      }
      else{
        play_song(s);//Si ya hay media agregada, solo reproducimos
      }
    }
}
int delete_song(Song **s){
  if(*s==0){//Si el apuntador a cancion es 0, devolvemos un error
    return -1;
  }//en caso contrarios liberamos la memoria
  libvlc_media_release((*s)->media);
  libvlc_media_player_release((*s)->mediaPlayer);
  libvlc_release((*s)->instance);
  free(*s);
  *s = 0;//El apuntador a cancion ahora será 0
  return 0;
}