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MusicPlayerInternal.c
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MusicPlayerInternal.c
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#include "MusicPlayerInternal.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include "defines.h"
// Linked list of name of songs
struct _Songs {
SongName song_name;
struct _Songs *next;
};
// Use for prevSong
time_t song_beggining_time = 0;
time_t time_passed_since_song_started = 0;
Songs* newSongs(char* song_list_file_name) {
/*--Vars--*/
FILE* songList = NULL;
Songs* songs = NULL;
Songs* head = NULL;
char next_song[MAX_SONG_SIZE] = { 0 };
uint32_t songNameLength = 0;
/*--Vars initialization--*/
ASSERT_NULL(song_list_file_name != NULL);
songList = fopen(song_list_file_name, "r");
ASSERT_NULL(songList != NULL);
// Make a first temporary node to append to
songs = newSongsNode(NULL, NULL);
if (songs == NULL) {
fclose(songList);
return NULL;
}
head = songs;
/*--Code--*/
// Append songs from file to songs
while((getNextSongFromFile(songList, next_song)) != -1) {
// Append song to song list and go to it
songs->next = newSongsNode(next_song, NULL);
ASSERT_NULL(songs->next != NULL);
songs = songs->next;
songs->next = NULL;
}
ASSERT_NULL(fclose(songList) == 0);
// Free first temporary node and return second node
songs = head->next;
free(head);
return songs;
}
uint32_t playSong(Songs* song) {
char songCommand[MAX_MPV_COMMAND_SIZE] = {0};
// Runs mpv in the background with no-termianal option to keep output and input hidden to the end user
snprintf(songCommand, MAX_MPV_COMMAND_SIZE, "mpv --no-terminal \"%s\" &", song->song_name);
system(songCommand);
// Set song beggining time
song_beggining_time = time(NULL);
// Delete current line and print song name
printf("\33[2K\r");
printf("%s", song->song_name);
}
void stopSong() {
// Kills mpv whether there is music playing or not
// Use this before playing a new song, otherwise the last song will keep playing
system("killall --quiet mpv");
}
Songs* newSongsNode(SongName _song_name, Songs* next) {
Songs* songNode = NULL;
uint32_t songNameLength = 0;
songNode = (Songs*)malloc(1 * sizeof(Songs));
ASSERT_NULL(songNode != NULL);
if(_song_name == NULL) {
songNode->song_name = NULL;
}
// Copy song name
else {
songNameLength = strnlen(_song_name, MAX_SONG_SIZE);
songNode->song_name = (SongName)malloc((songNameLength + 1) * sizeof(char));
if(songNode->song_name == NULL) {
free(songNode);
return NULL;
}
strncpy(songNode->song_name, _song_name, songNameLength);
}
songNode->next = next;
return songNode;
}
int32_t getNextSongFromFile(FILE* songList, char* songName) {
char c = 0;
uint32_t songNameLength = 0;
ASSERT_MINUS(songList != NULL);
ASSERT_MINUS(songName != NULL);
// Check for EOF before reading
if (feof(songList)) {
return EOF;
}
// Peak at the next char
c = getc(songList);
ungetc(c, songList);
// Ignore leading white-space characters
while (c == '\n' || c == ' ' || c == '\t') {
c = getc(songList);
if (c == EOF) {
return EOF;
}
}
// Get line with song name written on it
fgets(songName, MAX_SONG_SIZE, songList);
// If last letter \n, remove it
songNameLength = strnlen(songName, MAX_SONG_SIZE);
if (songNameLength > 0 && songName[songNameLength - 1] == '\n') {
songName[songNameLength - 1] = '\0';
}
return SUCCESS; // Success
}
void freeSongs(Songs* songs) {
if (songs == NULL) {
return;
}
free(songs->song_name);
Songs* tmp = songs->next;
free(songs);
freeSongs(tmp);
}
uint32_t songsGetSize(Songs* songs) {
if (songs == NULL){
return 0;
}
return 1 + songsGetSize(songs->next);
}
Songs* nextSong(Songs* song) {
return song->next;
}
Songs* prevSong(Songs* first_song, Songs* current_song) {
ASSERT_NULL(first_song != NULL);
ASSERT_NULL(current_song != NULL);
// If less than 1.5 second passed, return current song to start, or on the first song
time_passed_since_song_started = time(NULL) - song_beggining_time;
if (time_passed_since_song_started > 1.5 || first_song == current_song){
return current_song;
}
// Continue with the list until the first song is one before the current song or reached the end
while((first_song->next != current_song) && (first_song != NULL)) {
first_song = first_song->next;
}
// If first song reached the end, returns NULL
return first_song;
}
char* get_song_name(Songs* song) {
return song->song_name;
}
void print_songs_list(Songs* lst) {
static int cnt = 1;
if (lst == NULL){
printf("End\n");
cnt = 1;
return;
}
printf("%d --> %s\n", cnt++, lst->song_name);
print_songs_list(lst->next);
}
void stopSongAndQuit(){
stopSong();
exit(1);
}