src/audio_gain_test.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 # NOTE - This is a test app to see how far jacklib can go
   5
   6 # Imports (Global)
   7 import sys
   8 from PyQt4.QtCore import QTimer, SIGNAL
   9 from PyQt4.QtGui import QApplication, QDialog
  10
  11 # Imports (Custom Stuff)
  12 import jacklib, ui_plugin_audio_gain
  13
  14 global x_left, x_right, v_left, v_right
  15 x_left = x_right = 1.0
  16 v_left = v_right = 0.0
  17
  18 def process_callback(nframes, arg):
  19   global x_left, x_right, v_left, v_right
  20   v_leftx = v_rightx = 0.0
  21
  22   p_in1 = jacklib.translate_audio_port_buffer(jacklib.port_get_buffer(in_port1, nframes))
  23   p_in2 = jacklib.translate_audio_port_buffer(jacklib.port_get_buffer(in_port2, nframes))
  24   p_out1 = jacklib.translate_audio_port_buffer(jacklib.port_get_buffer(out_port1, nframes))
  25   p_out2 = jacklib.translate_audio_port_buffer(jacklib.port_get_buffer(out_port2, nframes))
  26
  27   for i in range(nframes):
  28     p_out1[i] = p_in1[i]*x_left
  29     p_out2[i] = p_in2[i]*x_right
  30
  31     if (abs(p_out1[i]) > v_leftx):
  32       v_leftx = abs(p_out1[i])
  33
  34     if (abs(p_out2[i]) > v_rightx):
  35       v_rightx = abs(p_out2[i])
  36
  37   v_left = v_leftx
  38   v_right = v_rightx
  39
  40   return 0
  41
  42 # TESTING!!!!!!!!!
  43 class AudioGainW(QDialog, ui_plugin_audio_gain.Ui_AudioGainW):
  44     def __init__(self, parent=None):
  45         super(AudioGainW, self).__init__(parent)
  46         self.setupUi(self)
  47
  48         self.refresh = 60 #miliseconds
  49
  50         self.dial_left.setPixmap(2)
  51         self.dial_right.setPixmap(2)
  52         self.dial_left.setLabel("Left")
  53         self.dial_right.setLabel("Right")
  54         self.lpeak.setChannels(1)
  55         self.lpeak.setMaximumWidth(20)
  56         self.lpeak.setRefreshRate(self.refresh*2/3)
  57         self.rpeak.setChannels(1)
  58         self.rpeak.setMaximumWidth(20)
  59         self.rpeak.setRefreshRate(self.refresh*2/3)
  60
  61         self.connect(self.dial_left, SIGNAL("valueChanged(int)"), self.checkValueL)
  62         self.connect(self.dial_right, SIGNAL("valueChanged(int)"), self.checkValueR)
  63
  64         self.resize(250, 150)
  65         self.checkPeaks()
  66
  67     def checkValueL(self, value):
  68         global x_left
  69         x_left = (float(value+50)/100)*2
  70
  71     def checkValueR(self, value):
  72         global x_right
  73         x_right = (float(value+50)/100)*2
  74
  75     def checkPeaks(self):
  76         global v_left, v_right
  77         self.lpeak.displayMeter(1, v_left)
  78         self.rpeak.displayMeter(1, v_right)
  79         QTimer.singleShot(self.refresh, self.checkPeaks)
  80
  81 #--------------- main ------------------
  82 if __name__ == '__main__':
  83
  84     # App initialization
  85     app = QApplication(sys.argv)
  86
  87     client = jacklib.client_open("audio_gain_test", jacklib.NullOption, 0)
  88     in_port1 = jacklib.port_register(client, "in-left", jacklib.DEFAULT_AUDIO_TYPE, jacklib.PortIsInput, 0)
  89     in_port2 = jacklib.port_register(client, "in-right", jacklib.DEFAULT_AUDIO_TYPE, jacklib.PortIsInput, 0)
  90     out_port1 = jacklib.port_register(client, "out-left", jacklib.DEFAULT_AUDIO_TYPE, jacklib.PortIsOutput, 0)
  91     out_port2 = jacklib.port_register(client, "out-right", jacklib.DEFAULT_AUDIO_TYPE, jacklib.PortIsOutput, 0)
  92
  93     jacklib.set_process_callback(client, process_callback, 0)
  94     jacklib.activate(client)
  95
  96     # Show GUI
  97     gui = AudioGainW()
  98     gui.show()
  99
 100     # App-Loop
 101     ret = app.exec_()
 102
 103     jacklib.deactivate(client)
 104     jacklib.client_close(client)
 105
 106     sys.exit(ret)