Ajout d'une propriété qui donne l'histogramme des fréquences d'intervalles.

[minwii.git] / src / minwii / logfilereader.py

diff --git a/src/minwii/logfilereader.py b/src/minwii/logfilereader.py
index 44c3611..a5a2d35 100755 (executable)
--- a/src/minwii/logfilereader.py
+++ b/src/minwii/logfilereader.py
@@ -6,12 +6,14 @@ $Id$
 $URL$
 """
 
 $URL$
 """
 

+from types import StringTypes

 from widgets.playingscreen import PlayingScreenBase
 from eventutils import EventDispatcher
 from events import eventCodes
 from synth import Synth
 from musicxml import musicXml2Song
 import pygame
 from widgets.playingscreen import PlayingScreenBase
 from eventutils import EventDispatcher
 from events import eventCodes
 from synth import Synth
 from musicxml import musicXml2Song
 import pygame

+from backwardsfilereader import BackwardsReader

 
 SUPPORTED_FILE_HEADER = 'ENV winwii log format version : 1.0'
 
 
 SUPPORTED_FILE_HEADER = 'ENV winwii log format version : 1.0'
 


@@ -29,12 +31,12 @@ class LogFileReader(object) :
     classe utilitaire pour l'accès aux données d'un fichier de log MinWii.
     """
     
     classe utilitaire pour l'accès aux données d'un fichier de log MinWii.
     """
     

-    def __init__(self, logfile) :
+    def __init__(self, logfile, mode='r') :

         """ logfile : chemin d'accès au fichier de log MinWii.
             le format supporté est actuellement la version 1.0 uniquement.
         """
         """ logfile : chemin d'accès au fichier de log MinWii.
             le format supporté est actuellement la version 1.0 uniquement.
         """

-        if isinstance(logfile, str) :
-            self.logfile = open(logfile, 'r')
+        if isinstance(logfile, StringTypes) :
+            self.logfile = open(logfile, mode)

         else :
             self.logfile = logfile
         
         else :
             self.logfile = logfile
         


@@ -106,8 +108,20 @@ class LogFileReader(object) :
         firstTicks = int(l.split(None, 2)[1])
         return firstTicks
     
         firstTicks = int(l.split(None, 2)[1])
         return firstTicks
     

+    @inplaceread
+    def getLastEventTicks(self) :
+        "retourne le timecode du dernier événement (entier)"
+        for l in self.getBackwardLineIterator() :
+            if l.startswith('EVT ') :
+                break
+        else :
+            return None
+        
+        lastTicks = int(l.split(None, 2)[1])
+        return lastTicks
+    

     def __del__(self) :
     def __del__(self) :

-        self.logfile.close()
+        self.close()

     
     def __iter__(self) :
         return self
     
     def __iter__(self) :
         return self


@@ -139,6 +153,47 @@ class LogFileReader(object) :
                 ticks, eventName = l.split(None, 3)[1:]
                 ticks = int(ticks)
                 yield ticks, eventName, ''
                 ticks, eventName = l.split(None, 3)[1:]
                 ticks = int(ticks)
                 yield ticks, eventName, ''

+    
+    def getBackwardLineIterator(self) :
+        br = BackwardsReader(self.logfile, BLKSIZE=128)
+        line = br.readline()
+        while line :
+            yield line.strip()
+            line = br.readline()
+    
+    @inplaceread
+    def getMetadata(self) :
+        metadata = {}
+        self.next() # skip identification line.
+        line = self.next()
+        while line.startswith('METADATA ') :
+            line = line.split(None, 1)[1]
+            name, value = [v.strip() for v in line.split(':', 1)]
+            metadata[name] = value
+            line = self.next()
+        return metadata
+    
+    def setMetadata(self, metadata) :
+        f = self.logfile
+        f.seek(0)
+        before = f.readline()
+        line = f.readline()
+        while line.startswith('METADATA ') :
+            line = f.readline()
+        after = line + f.read()
+        
+        lines = []
+        for name, value in metadata :
+            lines.append('METADATA %s : %s' % (name, value.encode('utf-8')))
+        metadata = '\n'.join(lines)
+        f.seek(0)
+        f.write(before)
+        f.write(metadata)
+        f.write(after)
+    
+    def close(self) :
+        self.logfile.close()
+        

                 
 
 class LogFilePlayer(PlayingScreenBase) :
                 
 
 class LogFilePlayer(PlayingScreenBase) :


@@ -210,5 +265,4 @@ class LogFilePlayer(PlayingScreenBase) :
             previousTicks = ticks
         
         self.stop()
             previousTicks = ticks
         
         self.stop()

-        

     
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