diff options
| -rw-r--r-- | Lib/wave.py | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/Lib/wave.py b/Lib/wave.py index 35e3b6b..c34830a 100644 --- a/Lib/wave.py +++ b/Lib/wave.py @@ -78,6 +78,13 @@ WAVE_FORMAT_PCM = 0x0001 _array_fmts = None, 'b', 'h', None, 'l' +# Determine endian-ness +import struct +if struct.pack("h", 1) == "\000\001": + big_endian = 1 +else: + big_endian = 0 + def _read_long(file): x = 0L for i in range(4): @@ -309,7 +316,8 @@ class Wave_read: nitems = (self._data_chunk.chunksize - self._data_chunk.size_read) / self._sampwidth data.fromfile(self._data_chunk.file, nitems) self._data_chunk.size_read = self._data_chunk.size_read + nitems * self._sampwidth - data.byteswap() + if big_endian: + data.byteswap() data = data.tostring() else: data = self._data_chunk.read(nframes * self._framesize) @@ -482,7 +490,8 @@ class Wave_write: if self._sampwidth > 1: import array data = array.array(_array_fmts[self._sampwidth], data) - data.byteswap() + if big_endian: + data.byteswap() data.tofile(self._file) self._datawritten = self._datawritten + len(data) * self._sampwidth else: @@ -542,7 +551,7 @@ class Wave_write: return curpos = self._file.tell() self._file.seek(self._form_length_pos, 0) - _write_long(36 + self._datawritten) + _write_long(self._file, 36 + self._datawritten) self._file.seek(self._data_length_pos, 0) _write_long(self._file, self._datawritten) self._file.seek(curpos, 0) |