#! /scratchbox/tools/bin/python
#
# A tool for converting Pronto format hex codes to lircd.conf format
#
# Copyright by Olavi Akerman <olavi.akerman@gmail.com>
#
# pronto2lirc is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#

class CodeSequence:           # Handles codesequences parsing and conversion
   
    def ProcessPreamble(self,sPreamble):
        if sPreamble[0]<>"0000":
            raise "Formats other than starting with 0000 are not supported!"

        self.dIRFrequency=1000000/(long(sPreamble[1],16) * 0.241246) # Frequency of the IR carrier in Khz

        self.lOnceSequenceLength=long(sPreamble[2],16)          # No of pulses that is sent once when button is pressed
        self.lRepeatableSequenceLength=long(sPreamble[3],16)    # No of pulses that are repeatable while button pressed

    def CreatePulses(self,sItems):
        self.dPulseWidths=[]             # Table of Pulse widths. Length is repsented in microseconds

        for i in sItems:
            self.dPulseWidths.append(1000000*long(i,16)/self.dIRFrequency) # Convert pulse widths to uS

        if len(self.dPulseWidths)<>2*(self.lOnceSequenceLength+self.lRepeatableSequenceLength):
            raise "Number of actual codes does not match the header information!"

    def AnalyzeCode(self,sCodeName,sHexCodes):

        sHexTable=sHexCodes.split()
        self.sCodeName=sCodeName.rstrip()  # Name of the Code associated with code sequence

        self.ProcessPreamble(sHexTable[:4]) # First four sequences make up Preamble
        self.CreatePulses(sHexTable[4:])    # The rest are OnceSequence + RepeatableSequence
        return self.dPulseWidths[-1]        # Final gap=last off signal length

    def WriteCodeSection(self,fOut):
        fOut.write('\n\t\t\tname '+self.sCodeName+'\n')
        for i in range(len(self.dPulseWidths)-1):   # Do not write the last signal as lircd.conf
                                                    # does not contain last off signal length
            if (i%6) ==0:
                fOut.write('\t\t\t\t')

            fOut.write('%d ' % round(self.dPulseWidths[i]))

            if (i+1)%6 ==0:      # Group codes as six per line
                fOut.write('\n')

        fOut.write('\n')          # Final EOL

class HexParser:            
    def __init__(self,sFileName):
        f=open(sFileName,'r')
        self.sRemoteName=sFileName.split('.')[:1][0]  # Name of the remote
        self.sCodes=[]    # Codes contained in file
        self.lGap=0         # Final Gap

        while True:
            sLine=f.readline()

            if sLine=='' or sLine.strip()=='':   # EOF?
                break

            [sCodeName,sHexCodes]=sLine.split(':')
            seq=CodeSequence()
            finalgap=seq.AnalyzeCode(sCodeName,sHexCodes)
            if finalgap>self.lGap:
                self.lGap=finalgap

            self.sCodes.append(seq)
            
        f.close()

    def WriteLIRCConf(self,sOutFileName):
        f=open(sOutFileName,'w')

        f.write('begin remote\n')
        f.write('\tname\t'+self.sRemoteName+'\n')
        f.write('\tflags\tRAW_CODES\n')
        f.write('\teps\t30\n')
        f.write('\taeps\t100\n')
        f.write('\tgap\t%d\n' % self.lGap )
        f.write('\t\tbegin raw_codes\n')

        for i in self.sCodes:
            i.WriteCodeSection(f)
        
        f.write('\t\tend raw_codes\n')
        f.write('end remote\n')
        f.close()

# Main 
    
import sys

if len(sys.argv)<>2:
	print "Pronto codes converter to lircd.conf format (version 1.00)"
	print 
	print "Usage:   pronto2lirc.py inputfile.hex "
	print
	print "Input file must be in format where each line contains all codes"
	print "         associated with a button like:"
	print "         Button1:0000 00ac 000b 00de ..."
	print
	print "Result:  lircd.conf file is written to the current directory"
	print "         containing all the Pronto codes extracted from"
	print "         the input file"
	print
else:
	p=HexParser(sys.argv[1])
	p.WriteLIRCConf('lircd.conf')