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added kludge for buggy soundfiler from SGI; when reading 0 frames,

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just set file pointer correctly instead of returning the complete
file.
This commit is contained in:
Sjoerd Mullender 1993-01-29 12:01:00 +00:00
parent 772eca639c
commit 8d733a00f0
1 changed files with 12 additions and 1 deletions
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11
Lib/aifc.py
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@ -379,7 +379,16 @@ class Aifc_read():
self._comm_chunk_read = 0 self._comm_chunk_read = 0
while formlength > 0: while formlength > 0:
self._ssnd_seek_needed = 1 self._ssnd_seek_needed = 1
#DEBUG: SGI's soundfiler has a bug. There should
# be no need to check for EOF here.
try:
chunk = Chunk().init(self._file) chunk = Chunk().init(self._file)
except EOFError:
if formlength == 8:
print 'Warning: FORM chunk size too large'
formlength = 0
break
raise EOFError # different error, raise exception
formlength = formlength - 8 - chunk.chunksize formlength = formlength - 8 - chunk.chunksize
if chunk.chunksize & 1: if chunk.chunksize & 1:
formlength = formlength - 1 formlength = formlength - 1
@ -495,6 +504,8 @@ class Aifc_read():
if pos: if pos:
self._ssnd_chunk.setpos(pos + 8) self._ssnd_chunk.setpos(pos + 8)
self._ssnd_seek_needed = 0 self._ssnd_seek_needed = 0
if nframes == 0:
return ''
size = nframes * self._nchannels * self._sampwidth size = nframes * self._nchannels * self._sampwidth
if self._decomp: if self._decomp:
if self._comptype in ('ULAW', 'ALAW'): if self._comptype in ('ULAW', 'ALAW'):