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authorGeorg Brandl <georg@python.org>2010-10-30 08:29:28 +0000
committerGeorg Brandl <georg@python.org>2010-10-30 08:29:28 +0000
commitcc2adbc693c669bb212ea90483600eb3d71349c3 (patch)
tree7e7707be54d8663579da40bc2e120f4ed0484a31 /Lib/wave.py
parentIssue 10221: Improve error message for dict.pop(). (diff)
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#10198: fix duplicate header when writeframes() is called with an empty string.
Diffstat (limited to 'Lib/wave.py')
-rw-r--r--Lib/wave.py6
1 files changed, 5 insertions, 1 deletions
diff --git a/Lib/wave.py b/Lib/wave.py
index 57f9d171637..b5bb105d614 100644
--- a/Lib/wave.py
+++ b/Lib/wave.py
@@ -319,6 +319,7 @@ class Wave_write:
self._nframeswritten = 0
self._datawritten = 0
self._datalength = 0
+ self._headerwritten = False
def __del__(self):
self.close()
@@ -449,7 +450,7 @@ class Wave_write:
#
def _ensure_header_written(self, datasize):
- if not self._datawritten:
+ if not self._headerwritten:
if not self._nchannels:
raise Error('# channels not specified')
if not self._sampwidth:
@@ -459,6 +460,7 @@ class Wave_write:
self._write_header(datasize)
def _write_header(self, initlength):
+ assert not self._headerwritten
self._file.write(b'RIFF')
if not self._nframes:
self._nframes = initlength // (self._nchannels * self._sampwidth)
@@ -472,8 +474,10 @@ class Wave_write:
self._sampwidth * 8, 'data'))
self._data_length_pos = self._file.tell()
self._file.write(struct.pack('<l', self._datalength))
+ self._headerwritten = True
def _patchheader(self):
+ assert self._headerwritten
if self._datawritten == self._datalength:
return
curpos = self._file.tell()