pmxchords (31dec15)

git-svn-id: svn://tug.org/texlive/trunk@39249 c570f23f-e606-0410-a88d-b1316a301751

5 files changed, 409 insertions, 315 deletions

diff --git a/Build/source/texk/texlive/linked_scripts/pmxchords/pmxchords.lua b/Build/source/texk/texlive/linked_scripts/pmxchords/pmxchords.lua
index 1539e90a48a..58179a355a9 100755
--- a/Build/source/texk/texlive/linked_scripts/pmxchords/pmxchords.lua
+++ b/Build/source/texk/texlive/linked_scripts/pmxchords/pmxchords.lua
@@ -1,10 +1,10 @@
-#!/usr/bin/env texlua
+#! /usr/bin/env texlua
 --
 -- global constants
 --
-VERSION = "0.9.2"
-FILE_SUFFIX="_chtr"
-PMX_CMD="pmxab"
+VERSION = "0.9.3"
+FILE_SUFFIX = "_chtr"
+PMX_CMD = "pmxab"
 
 --[[
    pmxchords.lua: transpose chords (\ch.C.\) and process pmxab
@@ -30,9 +30,12 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 --[[
   ChangeLog:
+    version 0.9.3 2014-04-21 - fixed transposition problem:
+                               If song began in E-minor and signature is changed in half of song to A-minor
+                               transposition must be omitted.
 
     version 0.9.2 2013-12-13 - fixed: stop processing when pmxab fail. 
-                             - Do not remove file pmxaerr.dat.
+                             - When pmxab is called generated file pmxaerr.dat is not removed.
 
     version 0.9.1 2013-12-09 - added some options. Improved processing.
 
@@ -40,60 +43,89 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 --]]
 
 function usage()
-  print("Usage:  [texlua] pmxchords.lua  basename[.pmx] ")
-  print("     1. transpose chords into new file basename"..FILE_SUFFIX..".pmx")
-  print("     2. call pmxab on transposed file basename"..FILE_SUFFIX..".pmx")
-  print("     3. rename basename"..FILE_SUFFIX..".tex to basename.tex")
-  print("options: -v  version")
-  print("         -h  help")
-  print("         -s  stop after fist step. e.g. generate only transposed basename"..FILE_SUFFIX..".pmx file")
+    print("Usage:  [texlua] pmxchords.lua  basename[.pmx] ")
+    print("     1. transpose chords into new file basename" .. FILE_SUFFIX .. ".pmx")
+    print("     2. call pmxab on transposed file basename" .. FILE_SUFFIX .. ".pmx")
+    print("     3. rename basename" .. FILE_SUFFIX .. ".tex to basename.tex")
+    print("options: -v  version")
+    print("         -h  help")
+    print("         -s  stop after fist step. e.g. generate only transposed basename" .. FILE_SUFFIX .. ".pmx file")
 end
 
-function whoami ()
-  print("This is pmxchords.lua version ".. VERSION)
+function whoami()
+    print("This is pmxchords.lua version " .. VERSION)
 end
 
 whoami()
 if #arg == 0 then
-  usage()
-  os.exit(0)
+    usage()
+    os.exit(0)
 end
 
 kpse.set_program_name("luatex")
-require "ChordsTr"
+require"ChordsTr"
 
 function parseInputSignature(line)
-   -- parse input signature from pmx digits line. Only one line digits format is supported!
-   -- e.g.
-   --    1      1       2     4      2      4        0    -1
-   -- signature is -1 : F major
-   local res =  string.match(line, "^%s*[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+([%+%-]?[0-9]+)%s*$")
-   return tonumber(res)
+    -- parse input signature from pmx digits line. Only one line digits format is supported!
+    -- e.g.
+    --    1      1       2     4      2      4        0    -1
+    -- signature is -1 : F major
+    local res = string.match(line, "^%s*[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+([%+%-]?[0-9]+)%s*$")
+    return tonumber(res)
 end
 
 function parseOutputSignature(line)
-   -- parse output signature from pmx
-   -- e.g.
-   -- K-2+2
-   -- output signature is +2 : D major
-   local res =  string.match(line, "^K[%+%-]?[0-9]+([%+%-]?[0-9]+)")
-   return tonumber(res)
+    -- parse output signature from pmx
+    -- e.g.
+    -- K-2+2
+    -- output signature is +2 : D major
+    local res = string.match(line, "^K[%+%-]?[0-9]+([%+%-]?[0-9]+)")
+    return tonumber(res)
+end
+
+--
+-- Strip comments from line
+-- Comments begin with % character
+--
+function lineWithoutComment(line)
+    local i = string.find(line, "%%")
+    if (i == nil) then
+        return line
+    end
+    return line:sub(0, i - 1)
+end
+
+--
+-- Function checks only if the line contains \ch. string.
+-- It does not check correctly if notes already started. It checks only if chords started..
+-- Scenario bellow will fail!
+--   d44 f a r / % first line does not contain chords symbol
+--   % signature is changed
+--   K+0+0
+--   \ch.C.\ c44 e g r4 /
+--
+function checkChordsAlreadyStarted(line)
+    local i = string.find(lineWithoutComment(line), ChordsTr.CHORDS_BEGIN)
+    if (i ~= nil) then
+        return true
+    end
+    return false;
 end
 
 function handleErr(msg)
-   io.stderr:write(msg.."\n")
-   os.exit(2)
+    io.stderr:write(msg .. "\n")
+    os.exit(2)
 end
 
 --
 -- get file name without .pmx suffix
 --
 function getBaseFileName(fileName)
-   if fileName ~= "" and string.sub(fileName, -4, -1) == ".pmx" then
-	  return string.sub(fileName, 1, -5)
-   else
-	  return fileName
-   end
+    if fileName ~= "" and string.sub(fileName, -4, -1) == ".pmx" then
+        return string.sub(fileName, 1, -5)
+    else
+        return fileName
+    end
 end
 
 --
@@ -103,50 +135,57 @@ end
 -- return outputBaseName transposed pmx file name without .pmx suffix
 -- 
 function makeChordsTransposition(baseName)
-   local inputFileName = baseName..".pmx"
-   local inputFile = io.open(inputFileName, "r")
-   if(inputFile == nil) then
-      handleErr("File does not exist: "..inputFileName)
-   end
-
-   local outputBaseName = baseName..FILE_SUFFIX   -- output base name without suffix. Used for renaming generated .tex file ...
-   local outputFileName = outputBaseName..".pmx"
-   local outputFile = io.open(outputFileName, "w")
-   if(outputFile == nil) then
-      handleErr("Can not create temporary file: ".. outputFileName)
-   end
-
-   --
-   -- transpose chords from inputFile into outputFile
-   --
-   -- input and output signature will be parsed from input pmx file
-   --
-   local iSig = nil  -- input signature
-   local chTr = nil  -- chords transposition class
-
-   for line in inputFile:lines() do
-      if(chTr ~= nil) then
-		 outputFile:write(chTr:lineTranspose(line).."\n")
-      else
-		 outputFile:write(line.."\n")
-      end
-      if(iSig == nil) then
-		 iSig = parseInputSignature(line)
-		 if(iSig ~= nil) then
-			io.stderr:write("Chords: input signature detected: "..iSig .."\n")
-		 end
-      elseif(chTr == nil) then
-		 local oSig = parseOutputSignature(line)
-		 if(oSig ~= nil) then
-			io.stderr:write("Chords: output signature detected: "..oSig .."\n")
-			chTr = ChordsTr(iSig, oSig)
-		 end
-      end
-   end
-   inputFile:close()
-   outputFile:close()
-
-   return outputBaseName
+    local inputFileName = baseName .. ".pmx"
+    local inputFile = io.open(inputFileName, "r")
+    if (inputFile == nil) then
+        handleErr("File does not exist: " .. inputFileName)
+    end
+
+    local outputBaseName = baseName .. FILE_SUFFIX -- output base name without suffix. Used for renaming generated .tex file ...
+    local outputFileName = outputBaseName .. ".pmx"
+    local outputFile = io.open(outputFileName, "w")
+    if (outputFile == nil) then
+        handleErr("Can not create temporary file: " .. outputFileName)
+    end
+
+    --
+    -- transpose chords from inputFile into outputFile
+    --
+    -- input and output signature will be parsed from input pmx file
+    --
+    local iSig = nil -- input signature
+    local chTr = nil -- chords transposition class
+
+    -- If song began in E-minor and signature is changed in half of song to A-minor
+    --      transposition must be omitted.
+    local chordsAlreadyStarted = false;
+
+    for line in inputFile:lines() do
+        if (chTr ~= nil) then
+            outputFile:write(chTr:lineTranspose(line) .. "\n")
+        else
+            outputFile:write(line .. "\n")
+        end
+        if (iSig == nil) then
+            iSig = parseInputSignature(line)
+            if (iSig ~= nil) then
+                io.stderr:write("Chords: input signature detected: " .. iSig .. "\n")
+            end
+        elseif (chTr == nil and not chordsAlreadyStarted) then
+            local oSig = parseOutputSignature(line)
+            if (oSig ~= nil) then
+                io.stderr:write("Chords: output signature detected: " .. oSig .. "\n")
+                chTr = ChordsTr(iSig, oSig)
+            elseif (checkChordsAlreadyStarted(line)) then
+                io.stderr:write("Chords: notes already started. Chords transposition is omitted.\n")
+                chordsAlreadyStarted = true;
+            end
+        end
+    end
+    inputFile:close()
+    outputFile:close()
+
+    return outputBaseName
 end
 
 --
@@ -155,51 +194,51 @@ end
 -- param outputBaseName transposed pmx file name without .pmx suffix
 --
 function pmxabProcess(baseName, outputBaseName)
-   --
-   -- call pmxab to generate .tex file
-   --
-   os.execute(PMX_CMD .. " " .. outputBaseName )
-   -- check error
-   local pmxaerr = io.open("pmxaerr.dat", "r")
-   if (not pmxaerr) then
-       handleErr("No log file.")
-   end
-   linebuf = pmxaerr:read()
-   err = tonumber(linebuf)
-   pmxaerr:close()
-   if (err ~= 0 ) then
-      handleErr("PMX process fail! "..outputBaseName..".pmx")
-   end
-
-   os.rename(outputBaseName..".tex", baseName..".tex")
-
-   -- remove temporary files
-   os.remove(outputBaseName..".pmx")
-   os.remove(outputBaseName..".pml")
+    --
+    -- call pmxab to generate .tex file
+    --
+    os.execute(PMX_CMD .. " " .. outputBaseName)
+    -- check error
+    local pmxaerr = io.open("pmxaerr.dat", "r")
+    if (not pmxaerr) then
+        handleErr("No log file.")
+    end
+    local linebuf = pmxaerr:read()
+    local err = tonumber(linebuf)
+    pmxaerr:close()
+    if (err ~= 0) then
+        handleErr("PMX process fail! " .. outputBaseName .. ".pmx")
+    end
+
+    os.rename(outputBaseName .. ".tex", baseName .. ".tex")
+
+    -- remove temporary files
+    os.remove(outputBaseName .. ".pmx")
+    os.remove(outputBaseName .. ".pml")
 end
 
 narg = 1
 onlyTranspose = false
 
 repeat
-   this_arg = arg[narg]
-   if this_arg == "-v" then
-      os.exit(0)
-   elseif this_arg == "-h" then
-      usage()
-      os.exit(0)
-   elseif this_arg == "-s" then
-      onlyTranspose = true
-   else
-      local baseName = getBaseFileName(this_arg)
-      local outputBaseName = makeChordsTransposition(baseName)
-
-      if (onlyTranspose) then
-		 os.exit(0)
-      end
-      pmxabProcess(baseName, outputBaseName)
-   end
-
-   narg = narg + 1
+    local this_arg = arg[narg]
+    if this_arg == "-v" then
+        os.exit(0)
+    elseif this_arg == "-h" then
+        usage()
+        os.exit(0)
+    elseif this_arg == "-s" then
+        onlyTranspose = true
+    else
+        local baseName = getBaseFileName(this_arg)
+        local outputBaseName = makeChordsTransposition(baseName)
+
+        if (onlyTranspose) then
+            os.exit(0)
+        end
+        pmxabProcess(baseName, outputBaseName)
+    end
+
+    narg = narg + 1
 until narg > #arg
 
diff --git a/Master/texmf-dist/doc/man/man1/pmxchords.man1.pdf b/Master/texmf-dist/doc/man/man1/pmxchords.man1.pdf
index 8b65c5c7855..ea07d174fee 100644
--- a/Master/texmf-dist/doc/man/man1/pmxchords.man1.pdf
+++ b/Master/texmf-dist/doc/man/man1/pmxchords.man1.pdf
diff --git a/Master/texmf-dist/doc/pmxchords/README b/Master/texmf-dist/doc/pmxchords/README
index a8f378429cf..2b0c2b474a8 100644
--- a/Master/texmf-dist/doc/pmxchords/README
+++ b/Master/texmf-dist/doc/pmxchords/README
@@ -1,4 +1,3 @@
-2013-12-11
 Author: Ondrej Fafejta <fafejtao@gmail.com>
 Website: https://github.com/fafejtao/pmxChords
 
@@ -18,3 +17,20 @@ For installation and usage, see the pmxchords-install document.
 pmxchords is licensed under the GPL version 2 or later.
 
 This README was edited by Bob Tennent (rdt@cs.queensu.ca).
+
+ChangeLog:
+
+version 2.0.2: 2014-04-21
+               fixed transposition problem:
+               If song began in E-minor and signature is changed in half of song to A-minor
+               transposition must be omitted.
+
+version 2.0.1: 2013-12-13
+               Fixed:
+                - pmxchords.lua now loads correctly the ChordsTr module to make it work on Windows systems.
+                - pmxchords.lua does not remove the temporary file pmxaerr.dat
+                  that is required by Bob Tennent's pmx2pdf script.
+
+version 2.0.0: 2013-12-09 - rewrite code from perl to lua.
+
+version 1.0:  2012-03-16 - first version written in perl scripting language
\ No newline at end of file
diff --git a/Master/texmf-dist/scripts/pmxchords/ChordsTr.lua b/Master/texmf-dist/scripts/pmxchords/ChordsTr.lua
index e58ff11424a..737c9ce6422 100644
--- a/Master/texmf-dist/scripts/pmxchords/ChordsTr.lua
+++ b/Master/texmf-dist/scripts/pmxchords/ChordsTr.lua
@@ -1,38 +1,38 @@
 --[[
    (c) Copyright 2013 Ondrej Fafejta <fafejtao@gmail.com>
        https://github.com/fafejtao/pmxChords
-]]--
+]] --
 --
 -- Chords transposition class
 --
-ChordsTr = {}               -- the table representing the class, which will double as the metatable for the instances
+ChordsTr = {} -- the table representing the class, which will double as the metatable for the instances
 ChordsTr.__index = ChordsTr -- failed table lookups on the instances should fallback to the class table, to get methods
-setmetatable(
-   ChordsTr, 
-   {
-      __call = function (cls, ...)
-	 return cls.new(...)
-      end,
-   })
+setmetatable(ChordsTr,
+    {
+        __call = function(cls, ...)
+            return cls.new(...)
+        end,
+    })
 
 --
 -- global constants
 --
-ChordsTr.CHORDS_BEGIN="\\ch."
-ChordsTr.CHORDS_END=".\\"
-ChordsTr.BASE_CHORDS_ARR= { -- lua is indexing from 1 I need from 0 ...
-   [0] = "C", 
-   [1] = "Cs", 
-   [2] = "D", 
-   [3] = "Ef", 
-   [4] = "E", 
-   [5] = "F", 
-   [6] = "Fs", 
-   [7] = "G",
-   [8] = "Af", 
-   [9] = "A", 
-   [10] = "Bf", 
-   [11] = "B"
+ChordsTr.CHORDS_BEGIN = "\\ch."
+ChordsTr.CHORDS_END = ".\\"
+ChordsTr.BASE_CHORDS_ARR = {
+    -- lua is indexing from 1 I need from 0 ...
+    [0] = "C",
+    [1] = "Cs",
+    [2] = "D",
+    [3] = "Ef",
+    [4] = "E",
+    [5] = "F",
+    [6] = "Fs",
+    [7] = "G",
+    [8] = "Af",
+    [9] = "A",
+    [10] = "Bf",
+    [11] = "B"
 }
 
 --
@@ -41,9 +41,9 @@ ChordsTr.BASE_CHORDS_ARR= { -- lua is indexing from 1 I need from 0 ...
 --        oSig output signature e.g.  2 - D major
 --
 function ChordsTr.new(iSig, oSig)
-   local self = setmetatable({}, ChordsTr)
-   self.trMap = ChordsTr.__createTransposeMap(oSig - iSig)
-   return self
+    local self = setmetatable({}, ChordsTr)
+    self.trMap = ChordsTr.__createTransposeMap(oSig - iSig)
+    return self
 end
 
 --
@@ -52,21 +52,21 @@ end
 -- Key is input base chord and value is output base chord.
 --
 function ChordsTr.__createTransposeMap(sigDiff)
-   local size = 12
-   local halfTones = (sigDiff * 7) % size
-   if (halfTones < 0 ) then
-      halfTones = halfTones + size
-   end
-   
-   -- generate transpose map of base chords ...
-   local res = {}
-   local i 
-   for i = 0, size - 1, 1 do
-      local key = ChordsTr.BASE_CHORDS_ARR[i]
-      local trIdx = (i + halfTones) % size;
-      res[key] = ChordsTr.BASE_CHORDS_ARR[trIdx]
-   end
-   return res
+    local size = 12
+    local halfTones = (sigDiff * 7) % size
+    if (halfTones < 0) then
+        halfTones = halfTones + size
+    end
+
+    -- generate transpose map of base chords ...
+    local res = {}
+    local i
+    for i = 0, size - 1, 1 do
+        local key = ChordsTr.BASE_CHORDS_ARR[i]
+        local trIdx = (i + halfTones) % size;
+        res[key] = ChordsTr.BASE_CHORDS_ARR[trIdx]
+    end
+    return res
 end
 
 --
@@ -74,50 +74,50 @@ end
 -- Find each chords in line and transpose it into output signature.
 -- return transposed line.
 --
-function ChordsTr:lineTranspose(line) 
-   local pos = 0;
-   local trLine = "" -- transposed line (result)
-   while true do
-      local i = string.find(line, ChordsTr.CHORDS_BEGIN, pos)
-      if i == nil then 
-	 trLine = trLine .. string.sub(line, pos)
-	 break
-      end
-      i = i + 3 -- move after \ch.
-      trLine = trLine .. string.sub(line, pos, i)  -- append non chord string into result
-      pos = string.find(line, ChordsTr.CHORDS_END, i)
-      if pos == nil then                        -- TODO check correctly end of chords ... e.g. check wrong line (first chord is not finished correctly): \ch.C. c \ch.G7.\ b 
-	 io.stderr:write("End of chords was not found!\n")
-	 os.exit(-1)
-      end
-      chord = string.sub(line, i + 1, pos - 1)
-      trLine=trLine .. self:doTranspose(chord)
-   end
-   return trLine
+function ChordsTr:lineTranspose(line)
+    local pos = 0;
+    local trLine = "" -- transposed line (result)
+    while true do
+        local i = line:find(ChordsTr.CHORDS_BEGIN, pos)
+        if i == nil then
+            trLine = trLine .. line:sub(pos)
+            break
+        end
+        i = i + 3 -- move after \ch.
+        trLine = trLine .. line:sub(pos, i) -- append non chord string into result
+        pos = line:find(ChordsTr.CHORDS_END, i)
+        if pos == nil then -- TODO check correctly end of chords ... e.g. check wrong line (first chord is not finished correctly): \ch.C. c \ch.G7.\ b
+            io.stderr:write("End of chords was not found!\n")
+            os.exit(-1)
+        end
+        local chord = line:sub(i + 1, pos - 1)
+        trLine = trLine .. self:doTranspose(chord)
+    end
+    return trLine
 end
 
 --
 -- do transpose of one chord.
 --
 function ChordsTr:doTranspose(chord)
-   local base, alt = ChordsTr.splitChord(chord)
-   return self.trMap[base]..alt
-end	
+    local base, alt = ChordsTr.splitChord(chord)
+    return self.trMap[base] .. alt
+end
 
 --
 -- Split chord into two part: base chord and chord alteration.
 -- e.g. Fsm7 - base chord is Fs, alteration is m7
 --
 function ChordsTr.splitChord(chord)
-   if(chord.len == 1) then
-      return chord, ""
-   end
-   local secondChar = string.sub(chord, 2, 2)
-   if (secondChar == 's' or secondChar == 'f' ) then
-      return chord.sub(chord, 1, 2), chord.sub(chord, 3)
-   else
-      return chord.sub(chord, 1, 1), chord.sub(chord, 2)
-   end
+    if (chord.len == 1) then
+        return chord, ""
+    end
+    local secondChar = chord:sub(2, 2)
+    if (secondChar == 's' or secondChar == 'f') then
+        return chord:sub(1, 2), chord:sub(3)
+    else
+        return chord:sub(1, 1), chord:sub(2)
+    end
 end
 --
 -- end of ChordsTr class
diff --git a/Master/texmf-dist/scripts/pmxchords/pmxchords.lua b/Master/texmf-dist/scripts/pmxchords/pmxchords.lua
index 1539e90a48a..58179a355a9 100755
--- a/Master/texmf-dist/scripts/pmxchords/pmxchords.lua
+++ b/Master/texmf-dist/scripts/pmxchords/pmxchords.lua
@@ -1,10 +1,10 @@
-#!/usr/bin/env texlua
+#! /usr/bin/env texlua
 --
 -- global constants
 --
-VERSION = "0.9.2"
-FILE_SUFFIX="_chtr"
-PMX_CMD="pmxab"
+VERSION = "0.9.3"
+FILE_SUFFIX = "_chtr"
+PMX_CMD = "pmxab"
 
 --[[
    pmxchords.lua: transpose chords (\ch.C.\) and process pmxab
@@ -30,9 +30,12 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 --[[
   ChangeLog:
+    version 0.9.3 2014-04-21 - fixed transposition problem:
+                               If song began in E-minor and signature is changed in half of song to A-minor
+                               transposition must be omitted.
 
     version 0.9.2 2013-12-13 - fixed: stop processing when pmxab fail. 
-                             - Do not remove file pmxaerr.dat.
+                             - When pmxab is called generated file pmxaerr.dat is not removed.
 
     version 0.9.1 2013-12-09 - added some options. Improved processing.
 
@@ -40,60 +43,89 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 --]]
 
 function usage()
-  print("Usage:  [texlua] pmxchords.lua  basename[.pmx] ")
-  print("     1. transpose chords into new file basename"..FILE_SUFFIX..".pmx")
-  print("     2. call pmxab on transposed file basename"..FILE_SUFFIX..".pmx")
-  print("     3. rename basename"..FILE_SUFFIX..".tex to basename.tex")
-  print("options: -v  version")
-  print("         -h  help")
-  print("         -s  stop after fist step. e.g. generate only transposed basename"..FILE_SUFFIX..".pmx file")
+    print("Usage:  [texlua] pmxchords.lua  basename[.pmx] ")
+    print("     1. transpose chords into new file basename" .. FILE_SUFFIX .. ".pmx")
+    print("     2. call pmxab on transposed file basename" .. FILE_SUFFIX .. ".pmx")
+    print("     3. rename basename" .. FILE_SUFFIX .. ".tex to basename.tex")
+    print("options: -v  version")
+    print("         -h  help")
+    print("         -s  stop after fist step. e.g. generate only transposed basename" .. FILE_SUFFIX .. ".pmx file")
 end
 
-function whoami ()
-  print("This is pmxchords.lua version ".. VERSION)
+function whoami()
+    print("This is pmxchords.lua version " .. VERSION)
 end
 
 whoami()
 if #arg == 0 then
-  usage()
-  os.exit(0)
+    usage()
+    os.exit(0)
 end
 
 kpse.set_program_name("luatex")
-require "ChordsTr"
+require"ChordsTr"
 
 function parseInputSignature(line)
-   -- parse input signature from pmx digits line. Only one line digits format is supported!
-   -- e.g.
-   --    1      1       2     4      2      4        0    -1
-   -- signature is -1 : F major
-   local res =  string.match(line, "^%s*[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+([%+%-]?[0-9]+)%s*$")
-   return tonumber(res)
+    -- parse input signature from pmx digits line. Only one line digits format is supported!
+    -- e.g.
+    --    1      1       2     4      2      4        0    -1
+    -- signature is -1 : F major
+    local res = string.match(line, "^%s*[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+([%+%-]?[0-9]+)%s*$")
+    return tonumber(res)
 end
 
 function parseOutputSignature(line)
-   -- parse output signature from pmx
-   -- e.g.
-   -- K-2+2
-   -- output signature is +2 : D major
-   local res =  string.match(line, "^K[%+%-]?[0-9]+([%+%-]?[0-9]+)")
-   return tonumber(res)
+    -- parse output signature from pmx
+    -- e.g.
+    -- K-2+2
+    -- output signature is +2 : D major
+    local res = string.match(line, "^K[%+%-]?[0-9]+([%+%-]?[0-9]+)")
+    return tonumber(res)
+end
+
+--
+-- Strip comments from line
+-- Comments begin with % character
+--
+function lineWithoutComment(line)
+    local i = string.find(line, "%%")
+    if (i == nil) then
+        return line
+    end
+    return line:sub(0, i - 1)
+end
+
+--
+-- Function checks only if the line contains \ch. string.
+-- It does not check correctly if notes already started. It checks only if chords started..
+-- Scenario bellow will fail!
+--   d44 f a r / % first line does not contain chords symbol
+--   % signature is changed
+--   K+0+0
+--   \ch.C.\ c44 e g r4 /
+--
+function checkChordsAlreadyStarted(line)
+    local i = string.find(lineWithoutComment(line), ChordsTr.CHORDS_BEGIN)
+    if (i ~= nil) then
+        return true
+    end
+    return false;
 end
 
 function handleErr(msg)
-   io.stderr:write(msg.."\n")
-   os.exit(2)
+    io.stderr:write(msg .. "\n")
+    os.exit(2)
 end
 
 --
 -- get file name without .pmx suffix
 --
 function getBaseFileName(fileName)
-   if fileName ~= "" and string.sub(fileName, -4, -1) == ".pmx" then
-	  return string.sub(fileName, 1, -5)
-   else
-	  return fileName
-   end
+    if fileName ~= "" and string.sub(fileName, -4, -1) == ".pmx" then
+        return string.sub(fileName, 1, -5)
+    else
+        return fileName
+    end
 end
 
 --
@@ -103,50 +135,57 @@ end
 -- return outputBaseName transposed pmx file name without .pmx suffix
 -- 
 function makeChordsTransposition(baseName)
-   local inputFileName = baseName..".pmx"
-   local inputFile = io.open(inputFileName, "r")
-   if(inputFile == nil) then
-      handleErr("File does not exist: "..inputFileName)
-   end
-
-   local outputBaseName = baseName..FILE_SUFFIX   -- output base name without suffix. Used for renaming generated .tex file ...
-   local outputFileName = outputBaseName..".pmx"
-   local outputFile = io.open(outputFileName, "w")
-   if(outputFile == nil) then
-      handleErr("Can not create temporary file: ".. outputFileName)
-   end
-
-   --
-   -- transpose chords from inputFile into outputFile
-   --
-   -- input and output signature will be parsed from input pmx file
-   --
-   local iSig = nil  -- input signature
-   local chTr = nil  -- chords transposition class
-
-   for line in inputFile:lines() do
-      if(chTr ~= nil) then
-		 outputFile:write(chTr:lineTranspose(line).."\n")
-      else
-		 outputFile:write(line.."\n")
-      end
-      if(iSig == nil) then
-		 iSig = parseInputSignature(line)
-		 if(iSig ~= nil) then
-			io.stderr:write("Chords: input signature detected: "..iSig .."\n")
-		 end
-      elseif(chTr == nil) then
-		 local oSig = parseOutputSignature(line)
-		 if(oSig ~= nil) then
-			io.stderr:write("Chords: output signature detected: "..oSig .."\n")
-			chTr = ChordsTr(iSig, oSig)
-		 end
-      end
-   end
-   inputFile:close()
-   outputFile:close()
-
-   return outputBaseName
+    local inputFileName = baseName .. ".pmx"
+    local inputFile = io.open(inputFileName, "r")
+    if (inputFile == nil) then
+        handleErr("File does not exist: " .. inputFileName)
+    end
+
+    local outputBaseName = baseName .. FILE_SUFFIX -- output base name without suffix. Used for renaming generated .tex file ...
+    local outputFileName = outputBaseName .. ".pmx"
+    local outputFile = io.open(outputFileName, "w")
+    if (outputFile == nil) then
+        handleErr("Can not create temporary file: " .. outputFileName)
+    end
+
+    --
+    -- transpose chords from inputFile into outputFile
+    --
+    -- input and output signature will be parsed from input pmx file
+    --
+    local iSig = nil -- input signature
+    local chTr = nil -- chords transposition class
+
+    -- If song began in E-minor and signature is changed in half of song to A-minor
+    --      transposition must be omitted.
+    local chordsAlreadyStarted = false;
+
+    for line in inputFile:lines() do
+        if (chTr ~= nil) then
+            outputFile:write(chTr:lineTranspose(line) .. "\n")
+        else
+            outputFile:write(line .. "\n")
+        end
+        if (iSig == nil) then
+            iSig = parseInputSignature(line)
+            if (iSig ~= nil) then
+                io.stderr:write("Chords: input signature detected: " .. iSig .. "\n")
+            end
+        elseif (chTr == nil and not chordsAlreadyStarted) then
+            local oSig = parseOutputSignature(line)
+            if (oSig ~= nil) then
+                io.stderr:write("Chords: output signature detected: " .. oSig .. "\n")
+                chTr = ChordsTr(iSig, oSig)
+            elseif (checkChordsAlreadyStarted(line)) then
+                io.stderr:write("Chords: notes already started. Chords transposition is omitted.\n")
+                chordsAlreadyStarted = true;
+            end
+        end
+    end
+    inputFile:close()
+    outputFile:close()
+
+    return outputBaseName
 end
 
 --
@@ -155,51 +194,51 @@ end
 -- param outputBaseName transposed pmx file name without .pmx suffix
 --
 function pmxabProcess(baseName, outputBaseName)
-   --
-   -- call pmxab to generate .tex file
-   --
-   os.execute(PMX_CMD .. " " .. outputBaseName )
-   -- check error
-   local pmxaerr = io.open("pmxaerr.dat", "r")
-   if (not pmxaerr) then
-       handleErr("No log file.")
-   end
-   linebuf = pmxaerr:read()
-   err = tonumber(linebuf)
-   pmxaerr:close()
-   if (err ~= 0 ) then
-      handleErr("PMX process fail! "..outputBaseName..".pmx")
-   end
-
-   os.rename(outputBaseName..".tex", baseName..".tex")
-
-   -- remove temporary files
-   os.remove(outputBaseName..".pmx")
-   os.remove(outputBaseName..".pml")
+    --
+    -- call pmxab to generate .tex file
+    --
+    os.execute(PMX_CMD .. " " .. outputBaseName)
+    -- check error
+    local pmxaerr = io.open("pmxaerr.dat", "r")
+    if (not pmxaerr) then
+        handleErr("No log file.")
+    end
+    local linebuf = pmxaerr:read()
+    local err = tonumber(linebuf)
+    pmxaerr:close()
+    if (err ~= 0) then
+        handleErr("PMX process fail! " .. outputBaseName .. ".pmx")
+    end
+
+    os.rename(outputBaseName .. ".tex", baseName .. ".tex")
+
+    -- remove temporary files
+    os.remove(outputBaseName .. ".pmx")
+    os.remove(outputBaseName .. ".pml")
 end
 
 narg = 1
 onlyTranspose = false
 
 repeat
-   this_arg = arg[narg]
-   if this_arg == "-v" then
-      os.exit(0)
-   elseif this_arg == "-h" then
-      usage()
-      os.exit(0)
-   elseif this_arg == "-s" then
-      onlyTranspose = true
-   else
-      local baseName = getBaseFileName(this_arg)
-      local outputBaseName = makeChordsTransposition(baseName)
-
-      if (onlyTranspose) then
-		 os.exit(0)
-      end
-      pmxabProcess(baseName, outputBaseName)
-   end
-
-   narg = narg + 1
+    local this_arg = arg[narg]
+    if this_arg == "-v" then
+        os.exit(0)
+    elseif this_arg == "-h" then
+        usage()
+        os.exit(0)
+    elseif this_arg == "-s" then
+        onlyTranspose = true
+    else
+        local baseName = getBaseFileName(this_arg)
+        local outputBaseName = makeChordsTransposition(baseName)
+
+        if (onlyTranspose) then
+            os.exit(0)
+        end
+        pmxabProcess(baseName, outputBaseName)
+    end
+
+    narg = narg + 1
 until narg > #arg