pygame / test / sndarray_test.py

if __name__ == '__main__':
    import sys
    import os
    pkg_dir = os.path.split(os.path.abspath(__file__))[0]
    parent_dir, pkg_name = os.path.split(pkg_dir)
    is_pygame_pkg = (pkg_name == 'tests' and
                     os.path.split(parent_dir)[1] == 'pygame')
    if not is_pygame_pkg:
        sys.path.insert(0, parent_dir)
else:
    is_pygame_pkg = __name__.startswith('pygame.tests.')

if is_pygame_pkg:
    from pygame.tests.test_utils import test_not_implemented, unittest
else:
    from test.test_utils import test_not_implemented, unittest
import pygame

arraytype = ""
try:
    import pygame.sndarray
except ImportError:
    pass
else:
    arraytype = pygame.sndarray.get_arraytype()
    if arraytype == 'numpy':
        from numpy import \
             int8, int16, uint8, uint16, array, alltrue
    elif arraytype == 'numeric':
        from Numeric import \
             Int8 as int8, Int16 as int16, UInt8 as uint8, UInt16 as uint16, \
             array, alltrue
    else:
        print ("Unknown array type %s; tests skipped" %
               (pygame.sndarray.get_arraytype(),))
        arraytype = ""


class SndarrayTest (unittest.TestCase):
    if arraytype:
        array_dtypes = {8: uint8, -8: int8, 16: uint16, -16: int16}

    def _assert_compatible(self, arr, size):
        dtype = self.array_dtypes[size]
        if arraytype == 'numpy':
            self.failUnlessEqual(arr.dtype, dtype)
        else:
            self.failUnlessEqual(arr.typecode(), dtype)

    def test_import(self):
        'does it import'
        if not arraytype:
            self.fail("no array package installed")
        import pygame.sndarray

    def test_array(self):
        if not arraytype:
            self.fail("no array package installed")

        def check_array(size, channels, test_data):
            try:
                pygame.mixer.init(22050, size, channels)
            except pygame.error:
                # Not all sizes are supported on all systems.
                return
            try:
                __, sz, __ = pygame.mixer.get_init()
                if sz == size:
                    srcarr = array(test_data, self.array_dtypes[size])
                    snd = pygame.sndarray.make_sound(srcarr)
                    arr = pygame.sndarray.array(snd)
                    self._assert_compatible(arr, size)
                    self.failUnless(alltrue(arr == srcarr),
                                    "size: %i\n%s\n%s" %
                                    (size, arr, test_data))
            finally:
                pygame.mixer.quit()

        check_array(8, 1, [0, 0x0f, 0xf0, 0xff])
        check_array(8, 2,
                    [[0, 0x80], [0x2D, 0x41], [0x64, 0xA1], [0xff, 0x40]])
        check_array(16, 1, [0, 0x00ff, 0xff00, 0xffff])
        check_array(16, 2, [[0, 0xffff], [0xffff, 0],
                            [0x00ff, 0xff00], [0x0f0f, 0xf0f0]])
        check_array(-8, 1, [0, -0x80, 0x7f, 0x64])
        check_array(-8, 2,
                    [[0, -0x80], [-0x64, 0x64], [0x25, -0x50], [0xff, 0]])
        check_array(-16, 1, [0, 0x7fff, -0x7fff, -1])
        check_array(-16, 2, [[0, -0x7fff], [-0x7fff, 0],
                             [0x7fff, 0], [0, 0x7fff]])

    def test_get_arraytype(self):
        if not arraytype:
            self.fail("no array package installed")

        self.failUnless((pygame.sndarray.get_arraytype() in
                         ['numpy', 'numeric']),
                        ("unknown array type %s" %
                         pygame.sndarray.get_arraytype()))

    def test_get_arraytypes(self):
        if not arraytype:
            self.fail("no array package installed")

        arraytypes = pygame.sndarray.get_arraytypes()
        try:
            import numpy
        except ImportError:
            self.failIf('numpy' in arraytypes)
        else:
            self.failUnless('numpy' in arraytypes)

        try:
            import Numeric
        except ImportError:
            self.failIf('numeric' in arraytypes)
        else:
            self.failUnless('numeric' in arraytypes)

        for atype in arraytypes:
            self.failUnless(atype in ['numpy', 'numeric'],
                            "unknown array type %s" % atype)

    def test_make_sound(self):
        if not arraytype:
            self.fail("no array package installed")

        def check_sound(size, channels, test_data):
            try:
                pygame.mixer.init(22050, size, channels)
            except pygame.error:
                # Not all sizes are supported on all systems.
                return
            try:
                __, sz, __ = pygame.mixer.get_init()
                if sz == size:
                    srcarr = array(test_data, self.array_dtypes[size])
                    snd = pygame.sndarray.make_sound(srcarr)
                    arr = pygame.sndarray.samples(snd)
                    self.failUnless(alltrue(arr == srcarr),
                                    "size: %i\n%s\n%s" %
                                    (size, arr, test_data))
            finally:
                pygame.mixer.quit()

        check_sound(8, 1, [0, 0x0f, 0xf0, 0xff])
        check_sound(8, 2,
                    [[0, 0x80], [0x2D, 0x41], [0x64, 0xA1], [0xff, 0x40]])
        check_sound(16, 1, [0, 0x00ff, 0xff00, 0xffff])
        check_sound(16, 2, [[0, 0xffff], [0xffff, 0],
                            [0x00ff, 0xff00], [0x0f0f, 0xf0f0]])
        check_sound(-8, 1, [0, -0x80, 0x7f, 0x64])
        check_sound(-8, 2,
                    [[0, -0x80], [-0x64, 0x64], [0x25, -0x50], [0xff, 0]])
        check_sound(-16, 1, [0, 0x7fff, -0x7fff, -1])
        check_sound(-16, 2, [[0, -0x7fff], [-0x7fff, 0],
                             [0x7fff, 0], [0, 0x7fff]])

    def test_samples(self):
        if not arraytype:
            self.fail("no array package installed")

        def check_sample(size, channels, test_data):
            try:
                pygame.mixer.init(22050, size, channels)
            except pygame.error:
                # Not all sizes are supported on all systems.
                return
            try:
                __, sz, __ = pygame.mixer.get_init()
                if sz == size:
                    zeroed = '\0' * ((abs(size) // 8) *
                                     len(test_data) *
                                     channels)
                    snd = pygame.mixer.Sound(buffer(zeroed))
                    samples = pygame.sndarray.samples(snd)
                    self._assert_compatible(samples, size)
                    print ('X %s' % (samples.shape,))
                    print ('Y %s' % (test_data,))
                    samples[...] = test_data
                    arr = pygame.sndarray.array(snd)
                    self.failUnless(alltrue(samples == arr),
                                    "size: %i\n%s\n%s" %
                                    (size, arr, test_data))
            finally:
                pygame.mixer.quit()

        check_sample(8, 1, [0, 0x0f, 0xf0, 0xff])
        check_sample(8, 2,
                    [[0, 0x80], [0x2D, 0x41], [0x64, 0xA1], [0xff, 0x40]])
        check_sample(16, 1, [0, 0x00ff, 0xff00, 0xffff])
        check_sample(16, 2, [[0, 0xffff], [0xffff, 0],
                            [0x00ff, 0xff00], [0x0f0f, 0xf0f0]])
        check_sample(-8, 1, [0, -0x80, 0x7f, 0x64])
        check_sample(-8, 2,
                    [[0, -0x80], [-0x64, 0x64], [0x25, -0x50], [0xff, 0]])
        check_sample(-16, 1, [0, 0x7fff, -0x7fff, -1])
        check_sample(-16, 2, [[0, -0x7fff], [-0x7fff, 0],
                             [0x7fff, 0], [0, 0x7fff]])

    def test_use_arraytype(self):
        if not arraytype:
            self.fail("no array package installed")

        def do_use_arraytype(atype):
            pygame.sndarray.use_arraytype(atype)

        try:
            import numpy
        except ImportError:
            self.failUnlessRaises(ValueError, do_use_arraytype, 'numpy')
            self.failIfEqual(pygame.sndarray.get_arraytype(), 'numpy')
        else:
            pygame.sndarray.use_arraytype('numpy')
            self.failUnlessEqual(pygame.sndarray.get_arraytype(), 'numpy')

        try:
            import Numeric
        except ImportError:
            self.failUnlessRaises(ValueError, do_use_arraytype, 'numeric')
            self.failIfEqual(pygame.sndarray.get_arraytype(), 'numeric')
        else:
            pygame.sndarray.use_arraytype('numeric')
            self.failUnlessEqual(pygame.sndarray.get_arraytype(), 'numeric')

        self.failUnlessRaises(ValueError, do_use_arraytype, 'not an option')


if __name__ == '__main__':
    unittest.main()
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