Pygame：强制播放队列中的下一首歌曲，即使实际歌曲没有播放完？ （又名“下一步”按钮）

Question

我想用 pygame 实现和随身听一样的功能：播放、暂停、排队都可以。但是上一个/下一个按钮怎么做？

我如何使用 pygame 强制播放已排队的下一首歌曲（并传递实际正在播放的 ong？）

Answer 1

有一个歌曲标题列表，并使用变量跟踪您在列表中的位置。 无论您使用的是pygame.mixer.music还是pygame.mixer.Sound ，单击“下一步”按钮时，只需将变量更改一个，然后停止播放歌曲，然后让该歌曲对应于播放即可。

pygame.mixer.Sound代码示例：

#setup pygame above this
#load sounds
sound1 = pygame.mixer.Sound("soundone.ogg")
sound2 = pygame.mixer.Sound("soundtwo.ogg")

queue = [sound1, sound2] #note that the list holds the sounds, not strings
var = 0

sound1.play()

while 1:
    if next(): #whatever the next button trigger is
        queue[var].stop() # stop current song
        if var == len(queue - 1): # if it's the last song
            var = 0 # set the var to represent the first song
        else:
            var += 1 # else, next song
        queue[var].play() # play the song var corresponds to

Answer 2

这是我为自己工作的一个例子，目的是让我全神贯注于程序的行为。

from os import environ
environ['PYGAME_HIDE_SUPPORT_PROMPT'] = '1'  # noqa This is used to hide the default pygame import print statement.
import pygame
import time

# Credit: https://forums.raspberrypi.com/viewtopic.php?t=102008

pygame.mixer.init()
pygame.display.init()

screen = pygame.display.set_mode((420, 240))  # Shows PyGame Window.

playlist = list()
playlist.append('/Music/Tom MacDonald - Angels (Explicit).mp3')
playlist.append('/Music/Falling In Reverse - Bad Girls Club (Explicit).mp3')

pygame.mixer.music.load(playlist.pop())               # Get the first track from the playlist
pygame.mixer.music.queue(playlist.pop())              # Queue the 2nd song
pygame.mixer.music.set_endevent(pygame.USEREVENT)     # Setup the end track event
pygame.mixer.music.play()                             # Play the music

running = True
while running:
    time.sleep(.1)
    for event in pygame.event.get():
        if event.type == pygame.USEREVENT:                # A track has ended
            if len(playlist) > 0:                         # If there are more tracks in the queue...
                pygame.mixer.music.queue(playlist.pop())  # Queue the next one in the list
        elif event.type == pygame.QUIT:                   # Create a way to exit the program.
            running = False