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-rw-r--r--Lib/sndhdr.py240
1 files changed, 120 insertions, 120 deletions
diff --git a/Lib/sndhdr.py b/Lib/sndhdr.py
index b20a696..61cd5b3 100644
--- a/Lib/sndhdr.py
+++ b/Lib/sndhdr.py
@@ -32,20 +32,20 @@ explicitly given directories.
def what(filename):
- """Guess the type of a sound file"""
- res = whathdr(filename)
- return res
+ """Guess the type of a sound file"""
+ res = whathdr(filename)
+ return res
def whathdr(filename):
- """Recognize sound headers"""
- f = open(filename, 'r')
- h = f.read(512)
- for tf in tests:
- res = tf(h, f)
- if res:
- return res
- return None
+ """Recognize sound headers"""
+ f = open(filename, 'r')
+ h = f.read(512)
+ for tf in tests:
+ res = tf(h, f)
+ if res:
+ return res
+ return None
#-----------------------------------#
@@ -55,113 +55,113 @@ def whathdr(filename):
tests = []
def test_aifc(h, f):
- import aifc
- if h[:4] != 'FORM':
- return None
- if h[8:12] == 'AIFC':
- fmt = 'aifc'
- elif h[8:12] == 'AIFF':
- fmt = 'aiff'
- else:
- return None
- f.seek(0)
- try:
- a = aifc.openfp(f, 'r')
- except (EOFError, aifc.Error):
- return None
- return (fmt, a.getframerate(), a.getnchannels(), \
- a.getnframes(), 8*a.getsampwidth())
+ import aifc
+ if h[:4] != 'FORM':
+ return None
+ if h[8:12] == 'AIFC':
+ fmt = 'aifc'
+ elif h[8:12] == 'AIFF':
+ fmt = 'aiff'
+ else:
+ return None
+ f.seek(0)
+ try:
+ a = aifc.openfp(f, 'r')
+ except (EOFError, aifc.Error):
+ return None
+ return (fmt, a.getframerate(), a.getnchannels(), \
+ a.getnframes(), 8*a.getsampwidth())
tests.append(test_aifc)
def test_au(h, f):
- if h[:4] == '.snd':
- f = get_long_be
- elif h[:4] in ('\0ds.', 'dns.'):
- f = get_long_le
- else:
- return None
- type = 'au'
- hdr_size = f(h[4:8])
- data_size = f(h[8:12])
- encoding = f(h[12:16])
- rate = f(h[16:20])
- nchannels = f(h[20:24])
- sample_size = 1 # default
- if encoding == 1:
- sample_bits = 'U'
- elif encoding == 2:
- sample_bits = 8
- elif encoding == 3:
- sample_bits = 16
- sample_size = 2
- else:
- sample_bits = '?'
- frame_size = sample_size * nchannels
- return type, rate, nchannels, data_size/frame_size, sample_bits
+ if h[:4] == '.snd':
+ f = get_long_be
+ elif h[:4] in ('\0ds.', 'dns.'):
+ f = get_long_le
+ else:
+ return None
+ type = 'au'
+ hdr_size = f(h[4:8])
+ data_size = f(h[8:12])
+ encoding = f(h[12:16])
+ rate = f(h[16:20])
+ nchannels = f(h[20:24])
+ sample_size = 1 # default
+ if encoding == 1:
+ sample_bits = 'U'
+ elif encoding == 2:
+ sample_bits = 8
+ elif encoding == 3:
+ sample_bits = 16
+ sample_size = 2
+ else:
+ sample_bits = '?'
+ frame_size = sample_size * nchannels
+ return type, rate, nchannels, data_size/frame_size, sample_bits
tests.append(test_au)
def test_hcom(h, f):
- if h[65:69] != 'FSSD' or h[128:132] != 'HCOM':
- return None
- divisor = get_long_be(h[128+16:128+20])
- return 'hcom', 22050/divisor, 1, -1, 8
+ if h[65:69] != 'FSSD' or h[128:132] != 'HCOM':
+ return None
+ divisor = get_long_be(h[128+16:128+20])
+ return 'hcom', 22050/divisor, 1, -1, 8
tests.append(test_hcom)
def test_voc(h, f):
- if h[:20] != 'Creative Voice File\032':
- return None
- sbseek = get_short_le(h[20:22])
- rate = 0
- if 0 <= sbseek < 500 and h[sbseek] == '\1':
- ratecode = ord(h[sbseek+4])
- rate = int(1000000.0 / (256 - ratecode))
- return 'voc', rate, 1, -1, 8
+ if h[:20] != 'Creative Voice File\032':
+ return None
+ sbseek = get_short_le(h[20:22])
+ rate = 0
+ if 0 <= sbseek < 500 and h[sbseek] == '\1':
+ ratecode = ord(h[sbseek+4])
+ rate = int(1000000.0 / (256 - ratecode))
+ return 'voc', rate, 1, -1, 8
tests.append(test_voc)
def test_wav(h, f):
- # 'RIFF' <len> 'WAVE' 'fmt ' <len>
- if h[:4] != 'RIFF' or h[8:12] != 'WAVE' or h[12:16] != 'fmt ':
- return None
- style = get_short_le(h[20:22])
- nchannels = get_short_le(h[22:24])
- rate = get_long_le(h[24:28])
- sample_bits = get_short_le(h[34:36])
- return 'wav', rate, nchannels, -1, sample_bits
+ # 'RIFF' <len> 'WAVE' 'fmt ' <len>
+ if h[:4] != 'RIFF' or h[8:12] != 'WAVE' or h[12:16] != 'fmt ':
+ return None
+ style = get_short_le(h[20:22])
+ nchannels = get_short_le(h[22:24])
+ rate = get_long_le(h[24:28])
+ sample_bits = get_short_le(h[34:36])
+ return 'wav', rate, nchannels, -1, sample_bits
tests.append(test_wav)
def test_8svx(h, f):
- if h[:4] != 'FORM' or h[8:12] != '8SVX':
- return None
- # Should decode it to get #channels -- assume always 1
- return '8svx', 0, 1, 0, 8
+ if h[:4] != 'FORM' or h[8:12] != '8SVX':
+ return None
+ # Should decode it to get #channels -- assume always 1
+ return '8svx', 0, 1, 0, 8
tests.append(test_8svx)
def test_sndt(h, f):
- if h[:5] == 'SOUND':
- nsamples = get_long_le(h[8:12])
- rate = get_short_le(h[20:22])
- return 'sndt', rate, 1, nsamples, 8
+ if h[:5] == 'SOUND':
+ nsamples = get_long_le(h[8:12])
+ rate = get_short_le(h[20:22])
+ return 'sndt', rate, 1, nsamples, 8
tests.append(test_sndt)
def test_sndr(h, f):
- if h[:2] == '\0\0':
- rate = get_short_le(h[2:4])
- if 4000 <= rate <= 25000:
- return 'sndr', rate, 1, -1, 8
+ if h[:2] == '\0\0':
+ rate = get_short_le(h[2:4])
+ if 4000 <= rate <= 25000:
+ return 'sndr', rate, 1, -1, 8
tests.append(test_sndr)
@@ -171,16 +171,16 @@ tests.append(test_sndr)
#---------------------------------------------#
def get_long_be(s):
- return (ord(s[0])<<24) | (ord(s[1])<<16) | (ord(s[2])<<8) | ord(s[3])
+ return (ord(s[0])<<24) | (ord(s[1])<<16) | (ord(s[2])<<8) | ord(s[3])
def get_long_le(s):
- return (ord(s[3])<<24) | (ord(s[2])<<16) | (ord(s[1])<<8) | ord(s[0])
+ return (ord(s[3])<<24) | (ord(s[2])<<16) | (ord(s[1])<<8) | ord(s[0])
def get_short_be(s):
- return (ord(s[0])<<8) | ord(s[1])
+ return (ord(s[0])<<8) | ord(s[1])
def get_short_le(s):
- return (ord(s[1])<<8) | ord(s[0])
+ return (ord(s[1])<<8) | ord(s[0])
#--------------------#
@@ -188,40 +188,40 @@ def get_short_le(s):
#--------------------#
def test():
- import sys
- recursive = 0
- if sys.argv[1:] and sys.argv[1] == '-r':
- del sys.argv[1:2]
- recursive = 1
- try:
- if sys.argv[1:]:
- testall(sys.argv[1:], recursive, 1)
- else:
- testall(['.'], recursive, 1)
- except KeyboardInterrupt:
- sys.stderr.write('\n[Interrupted]\n')
- sys.exit(1)
+ import sys
+ recursive = 0
+ if sys.argv[1:] and sys.argv[1] == '-r':
+ del sys.argv[1:2]
+ recursive = 1
+ try:
+ if sys.argv[1:]:
+ testall(sys.argv[1:], recursive, 1)
+ else:
+ testall(['.'], recursive, 1)
+ except KeyboardInterrupt:
+ sys.stderr.write('\n[Interrupted]\n')
+ sys.exit(1)
def testall(list, recursive, toplevel):
- import sys
- import os
- for filename in list:
- if os.path.isdir(filename):
- print filename + '/:',
- if recursive or toplevel:
- print 'recursing down:'
- import glob
- names = glob.glob(os.path.join(filename, '*'))
- testall(names, recursive, 0)
- else:
- print '*** directory (use -r) ***'
- else:
- print filename + ':',
- sys.stdout.flush()
- try:
- print what(filename)
- except IOError:
- print '*** not found ***'
+ import sys
+ import os
+ for filename in list:
+ if os.path.isdir(filename):
+ print filename + '/:',
+ if recursive or toplevel:
+ print 'recursing down:'
+ import glob
+ names = glob.glob(os.path.join(filename, '*'))
+ testall(names, recursive, 0)
+ else:
+ print '*** directory (use -r) ***'
+ else:
+ print filename + ':',
+ sys.stdout.flush()
+ try:
+ print what(filename)
+ except IOError:
+ print '*** not found ***'
if __name__ == '__main__':
- test()
+ test()
generated by cgit v0.12 at 2024-11-23 21:53:46 (GMT)