Internet Radio » FabLab Radio 2.0

#!/usr/bin/env python

#

# FabLab Radio by HackLab Terni

#

import pygame

from pygame.locals import *

import time

from rotary_class import RotaryEncoder

import json

import mpd

import os

import math

from subprocess import call

os.environ["SDL_FBDEV"] = "/dev/fb1"

# Define GPIO inputs

PIN_A = 13 	# Pin 33

PIN_B = 26	# Pin 37

BUTTON = 6	# Pin 31

PIN_A_V = 16 	# Pin 36

PIN_B_V = 12	# Pin 32

BUTTON_V = 5	# Pin 29

index = 0

numSta = 16

volume = 0

changed = True

play = False

changedVol = True

mute = False

# This is the event callback routine to handle events

def switch_event(event):

	global index, numSta, changed, play

	if event == RotaryEncoder.CLOCKWISE:

		#print "Clockwise"

		changed = True

		index = index + 1

		if index > (numSta - 1):

			index = 0

	elif event == RotaryEncoder.ANTICLOCKWISE:

		#print "Anticlockwise"

		changed = True

		index = index - 1

		if index < 0:

			index = numSta - 1

	elif event == RotaryEncoder.BUTTONDOWN:

		#print "Button down"

		play = not play

		changed = True

	#elif event == RotaryEncoder.BUTTONUP:

	#	print "Button up"

	return

# This is the event callback routine to handle events

def volume_event(event):

	global changedVol, mute, volume

	if event == RotaryEncoder.CLOCKWISE:

		#print "Clockwise"

		changedVol = True

		volume = volume + 2

		if volume > 100:

			volume = 100

	elif event == RotaryEncoder.ANTICLOCKWISE:

		#print "Anticlockwise"

		changedVol = True

		volume = volume - 2

		if volume < 0:

			volume = 0

	elif event == RotaryEncoder.BUTTONDOWN:

		#print "Button down"

		mute = not mute

		changedVol = True

	#elif event == RotaryEncoder.BUTTONUP:

	#	print "Button up"

	return

# draw some text into an area of a surface

# automatically wraps words

# returns any text that didn't get blitted

def drawText(surface, text, color, rect, font, aa=False, bkg=None):

	rect = Rect(rect)

	y = rect.top

	lineSpacing = -2

	# get the height of the font

	fontHeight = font.size("Tg")[1]

	while text:

		i = 1

		# determine if the row of text will be outside our area

		if y + fontHeight > rect.bottom:

			break

		# determine maximum width of line

		while font.size(text[:i])[0] < rect.width and i < len(text):

			i += 1

		# if we've wrapped the text, then adjust the wrap to the last word	  

		if i < len(text): 

			i = text.rfind(" ", 0, i) + 1

		# render the line and blit it to the surface

		if bkg:

			image = font.render(text[:i], 1, color, bkg)

			image.set_colorkey(bkg)

		else:

			image = font.render(text[:i], aa, color)

		surface.blit(image, (rect.left, y))

		y += fontHeight + lineSpacing

		# remove the text we just blitted

		text = text[i:]

	return text

def load_stations():

	global stations

	fp = open('/var/www/html/stations.json', 'r')

	stations = json.load(fp)

	fp.close()

	client.clear()

	for ind in range(numSta):

		station = stations[ind]

		name = station['name']

		url = station['url']

		#print ind, name, url

		if url == "" or name == "":

			client.add("silence.mp3")

		else:

			client.add(url)

client = mpd.MPDClient()

client.connect("localhost", 6600)

#client.setvol(0)

call(["amixer", "sset",  "Master", str(0)])

load_stations()

print stations

print

pls = client.playlist()

for pl in pls:

	print pl

print

# Define the switch

rswitch = RotaryEncoder(PIN_A,PIN_B,BUTTON,switch_event)

volswitch = RotaryEncoder(PIN_A_V,PIN_B_V,BUTTON_V,volume_event)

# Initialise screen

pygame.display.init()

pygame.mixer.quit()

screen = pygame.display.set_mode((320, 240))

pygame.mouse.set_visible(False)

txtsurf1a = pygame.Surface((120, 32))

txtsurf1b = pygame.Surface((200, 32))

txtsurf1 = pygame.Surface((320, 32))

txtsurf2 = pygame.Surface((320, 64))

# Display some text

pygame.font.init()

font1 = pygame.font.Font(None, 48)

font2 = pygame.font.Font(None, 32)

text = font1.render("FabLab Radio", 1, (250, 50, 50))

textpos = text.get_rect()

textpos.centerx = 160

screen.blit(text, textpos)

while True:

	time.sleep(0.1)

	if changedVol:

		changedVol = False

		txtsurf1a.fill((0, 0, 0))

		if mute:

			#print "mute"

			#client.setvol(0)

                        call(["amixer", "sset",  "Master", str(0)])

			text = font2.render("Vol: mute", 1, (50, 250, 50))

		else:

			#print "volume",volume

			if (volume == 0):

				vol = 0

			else:

				vol = math.trunc(72*math.log10(volume))

			#client.setvol(vol)

                        call(["amixer", "sset",  "Master", str(vol)])

			text = font2.render("Vol: " + str(volume), 1, (50, 250, 50))

		txtsurf1a.blit(text, (10, 0))

		screen.blit(txtsurf1a, (200, 214))

	if changed:

		changed = False

		load_stations()

		station = stations[index]

		name = station['name']

		url = station['url']

		print index, name, url

		if play and url != "" and name != "":

			print "play"

			txtsurf1b.fill((0, 0, 0))

			text = font2.render("[play]", 1, (250, 50, 50))

			txtsurf1b.blit(text, (80, 0))

			text = font2.render("Sta: " + str(index+1), 1, (50, 250, 50))

			txtsurf1b.blit(text, (4, 0))

			screen.blit(txtsurf1b, (0, 214))

			txtsurf1.fill((0, 0, 0))

			text = font2.render(name, 1, (50, 250, 50))

			txtsurf1.blit(text, (4, 0))

			screen.blit(txtsurf1, (0, 32))

			client.play(index)

		else:

			print "stop"

			play = False

			txtsurf1b.fill((0, 0, 0))

			text = font2.render("[stop]", 1, (250, 50, 50))

			txtsurf1b.blit(text, (80, 0))

			text = font2.render("Sta: " + str(index+1), 1, (50, 250, 50))

			txtsurf1b.blit(text, (4, 0))

			screen.blit(txtsurf1b, (0, 214))

			txtsurf1.fill((0, 0, 0))

			text = font2.render(name, 1, (50, 250, 50))

			txtsurf1.blit(text, (4, 0))

			screen.blit(txtsurf1, (0, 32))

			client.stop()

	cs = client.currentsong()

	if play and cs:

		#print cs

		#print

		if 'title' in cs:

		        SongTitle = cs['title']

		elif 'file' in cs:

		 	SongTitle = cs['file']

		txtsurf2.fill((0, 0, 0))

		drawText(txtsurf2, SongTitle, (50, 50, 250), txtsurf2.get_rect(), font2, 1)

		screen.blit(txtsurf2, (0, 150))

		if 'name' in cs:

			txt = cs['name']

			txtsurf2.fill((0, 0, 0))

			drawText(txtsurf2, txt, (250, 250, 50), txtsurf2.get_rect(), font2, 1)

			screen.blit(txtsurf2, (0, 60))

			txtsurf1.fill((0, 0, 0))

			text = font2.render("genre", 1, (50, 250, 250))

			txtsurf1.blit(text, (4, 0))

			screen.blit(txtsurf1, (0, 120))

	else:

		txtsurf2.fill((0, 0, 0))

		screen.blit(txtsurf2, (0, 60))

		screen.blit(txtsurf2, (0, 150))

		txtsurf1.fill((0, 0, 0))

		screen.blit(txtsurf1, (0, 120))

	for event in pygame.event.get():

		if event.type == QUIT:

			exit()

	pygame.display.flip()