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Implemented MP attribute breakdown with tests.

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This commit is contained in:
Eric W. Brown 2014-07-24 15:00:19 -04:00
parent dcd171c1b8
commit a5683ab574
3 changed files with 63 additions and 3 deletions
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27
PIL/JpegImagePlugin.py
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@ -474,10 +474,37 @@ def _getmp(self):
unpackedentry = unpack('{0}LLLHH'.format(endianness), rawmpentry)
labels = ('Attribute', 'Size', 'DataOffset', 'EntryNo1', 'EntryNo2')
mpentry = dict(zip(labels, unpackedentry))
mpentryattr = {
'DependentParentImageFlag': bool(mpentry['Attribute'] & (1<<31)),
'DependentChildImageFlag': bool(mpentry['Attribute'] & (1<<30)),
'RepresentativeImageFlag': bool(mpentry['Attribute'] & (1<<29)),
'Reserved': (mpentry['Attribute'] & (3<<27)) >> 27,
'ImageDataFormat': (mpentry['Attribute'] & (7<<24)) >> 24,
'MPType': mpentry['Attribute'] & 0x00FFFFFF
}
if mpentryattr['ImageDataFormat'] == 0:
mpentryattr['ImageDataFormat'] = 'JPEG'
else:
raise SyntaxError("unsupported picture format in MPO")
mptypemap = {
0x000000: 'Undefined',
0x010001: 'Large Thumbnail (VGA Equivalent)',
0x010002: 'Large Thumbnail (Full HD Equivalent)',
0x020001: 'Multi-Frame Image (Panorama)',
0x020002: 'Multi-Frame Image: (Disparity)',
0x020003: 'Multi-Frame Image: (Multi-Angle)',
0x030000: 'Baseline MP Primary Image'
}
mpentryattr['MPType'] = mptypemap.get(mpentryattr['MPType'],
'Unknown')
mpentry['Attribute'] = mpentryattr
mpentries.append(mpentry)
mp[0xB002] = mpentries
except KeyError:
raise SyntaxError("malformed MP Index (bad MP Entry)")
# Next we should try and parse the individual image unique ID list;
# we don't because I've never seen this actually used in a real MPO
# file and so can't test it.
return mp

14
PIL/TiffTags.py
View File

@ -226,6 +226,20 @@ TAGS = {
45058: "MPEntry",
45059: "ImageUIDList",
45060: "TotalFrames",
45313: "MPIndividualNum",
45569: "PanOrientation",
45570: "PanOverlap_H",
45571: "PanOverlap_V",
45572: "BaseViewpointNum",
45573: "ConvergenceAngle",
45574: "BaselineLength",
45575: "VerticalDivergence",
45576: "AxisDistance_X",
45577: "AxisDistance_Y",
45578: "AxisDistance_Z",
45579: "YawAngle",
45580: "PitchAngle",
45581: "RollAngle",
# Adobe DNG
50706: "DNGVersion",

25
Tests/test_file_mpo.py
View File

@ -51,9 +51,28 @@ class TestFileMpo(PillowTestCase):
def test_mp(self):
for test_file in test_files:
im = Image.open(test_file)
info = im._getmp()
self.assertEqual(info[45056], '0100')
self.assertEqual(info[45057], 2)
mpinfo = im._getmp()
self.assertEqual(mpinfo[45056], '0100')
self.assertEqual(mpinfo[45057], 2)
def test_mp_attribute(self):
for test_file in test_files:
im = Image.open(test_file)
mpinfo = im._getmp()
frameNumber = 0
for mpentry in mpinfo[45058]:
mpattr = mpentry['Attribute']
if frameNumber:
self.assertFalse(mpattr['RepresentativeImageFlag'])
else:
self.assertTrue(mpattr['RepresentativeImageFlag'])
self.assertFalse(mpattr['DependentParentImageFlag'])
self.assertFalse(mpattr['DependentChildImageFlag'])
self.assertEqual(mpattr['ImageDataFormat'], 'JPEG')
self.assertEqual(mpattr['MPType'],
'Multi-Frame Image: (Disparity)')
self.assertEqual(mpattr['Reserved'], 0)
frameNumber += 1
def test_seek(self):
for test_file in test_files: