comparison swig/aimc_data_io.py @ 150:9425901c60a6

corrected a bug with stereo files in FileInput, and some more stuff

+#!/usr/bin/env python
+#
+#  audio_example.py
+#  
+#
+#  Created by Philippe Hamel ([e-mail]) on 11-01-05.
+#
+# methods to read and write aimc data files
+
+from struct import *
+import numpy as N
+
+#int_size = calcsize('i')
+#float_size =  calcsize('d')
+
+def readbin(type,file) :
+    """
+    used to read binary data from a file
+    """
+    return unpack(type,file.read(calcsize(type)))
+
+def read_aimc_data(filename):
+    file = open(filename,'rb')
+        
+    nFrames = readbin('i',file)[0]
+    period = readbin( 'f', file)[0] # Frame period in ms
+    nChannels = readbin( 'i', file)[0] # vertical axis of an AI
+    nSamples = readbin( 'i', file)[0] # horizontal axis of an AI
+    sample_rate = readbin('f', file)[0] # sample rate of each channel in Hz
+    
+    print 'nFrames, period, nChannels, nSamples, sample_rate'
+    print nFrames, period, nChannels, nSamples, sample_rate
+    
+    nData = nFrames * nChannels * nSamples
+    print nData
+    vec_data = readbin('%if'%nData,file)
+    
+    file.close()
+    data = N.reshape(vec_data,(nFrames, nChannels, nSamples))
+    return data, nFrames, period, nChannels, nSamples, sample_rate
+
+#TODO write_aimc_data(data, nFrames, period, nChannels, nSamples, sample_rate)