| 1 | import audioop
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| 2 | import sys
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| 3 | import unittest
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| 4 | import struct
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| 5 | from test.test_support import run_unittest
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| 6 |
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| 7 |
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| 8 | formats = {
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| 9 | 1: 'b',
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| 10 | 2: 'h',
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| 11 | 4: 'i',
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| 12 | }
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| 13 |
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| 14 | def pack(width, data):
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| 15 | return struct.pack('=%d%s' % (len(data), formats[width]), *data)
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| 16 |
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| 17 | packs = {
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| 18 | 1: lambda *data: pack(1, data),
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| 19 | 2: lambda *data: pack(2, data),
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| 20 | 4: lambda *data: pack(4, data),
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| 21 | }
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| 22 | maxvalues = {w: (1 << (8 * w - 1)) - 1 for w in (1, 2, 4)}
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| 23 | minvalues = {w: -1 << (8 * w - 1) for w in (1, 2, 4)}
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| 24 |
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| 25 | datas = {
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| 26 | 1: b'\x00\x12\x45\xbb\x7f\x80\xff',
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| 27 | 2: packs[2](0, 0x1234, 0x4567, -0x4567, 0x7fff, -0x8000, -1),
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| 28 | 4: packs[4](0, 0x12345678, 0x456789ab, -0x456789ab,
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| 29 | 0x7fffffff, -0x80000000, -1),
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| 30 | }
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| 31 |
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| 32 | INVALID_DATA = [
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| 33 | (b'abc', 0),
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| 34 | (b'abc', 2),
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| 35 | (b'abc', 4),
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| 36 | ]
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| 37 |
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| 38 |
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| 39 | class TestAudioop(unittest.TestCase):
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| 40 |
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| 41 | def test_max(self):
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| 42 | for w in 1, 2, 4:
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| 43 | self.assertEqual(audioop.max(b'', w), 0)
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| 44 | p = packs[w]
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| 45 | self.assertEqual(audioop.max(p(5), w), 5)
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| 46 | self.assertEqual(audioop.max(p(5, -8, -1), w), 8)
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| 47 | self.assertEqual(audioop.max(p(maxvalues[w]), w), maxvalues[w])
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| 48 | self.assertEqual(audioop.max(p(minvalues[w]), w), -minvalues[w])
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| 49 | self.assertEqual(audioop.max(datas[w], w), -minvalues[w])
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| 50 |
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| 51 | def test_minmax(self):
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| 52 | for w in 1, 2, 4:
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| 53 | self.assertEqual(audioop.minmax(b'', w),
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| 54 | (0x7fffffff, -0x80000000))
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| 55 | p = packs[w]
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| 56 | self.assertEqual(audioop.minmax(p(5), w), (5, 5))
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| 57 | self.assertEqual(audioop.minmax(p(5, -8, -1), w), (-8, 5))
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| 58 | self.assertEqual(audioop.minmax(p(maxvalues[w]), w),
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| 59 | (maxvalues[w], maxvalues[w]))
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| 60 | self.assertEqual(audioop.minmax(p(minvalues[w]), w),
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| 61 | (minvalues[w], minvalues[w]))
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| 62 | self.assertEqual(audioop.minmax(datas[w], w),
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| 63 | (minvalues[w], maxvalues[w]))
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| 64 |
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| 65 | def test_maxpp(self):
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| 66 | for w in 1, 2, 4:
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| 67 | self.assertEqual(audioop.maxpp(b'', w), 0)
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| 68 | self.assertEqual(audioop.maxpp(packs[w](*range(100)), w), 0)
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| 69 | self.assertEqual(audioop.maxpp(packs[w](9, 10, 5, 5, 0, 1), w), 10)
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| 70 | self.assertEqual(audioop.maxpp(datas[w], w),
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| 71 | maxvalues[w] - minvalues[w])
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| 72 |
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| 73 | def test_avg(self):
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| 74 | for w in 1, 2, 4:
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| 75 | self.assertEqual(audioop.avg(b'', w), 0)
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| 76 | p = packs[w]
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| 77 | self.assertEqual(audioop.avg(p(5), w), 5)
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| 78 | self .assertEqual(audioop.avg(p(5, 8), w), 6)
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| 79 | self.assertEqual(audioop.avg(p(5, -8), w), -2)
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| 80 | self.assertEqual(audioop.avg(p(maxvalues[w], maxvalues[w]), w),
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| 81 | maxvalues[w])
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| 82 | self.assertEqual(audioop.avg(p(minvalues[w], minvalues[w]), w),
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| 83 | minvalues[w])
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| 84 | self.assertEqual(audioop.avg(packs[4](0x50000000, 0x70000000), 4),
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| 85 | 0x60000000)
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| 86 | self.assertEqual(audioop.avg(packs[4](-0x50000000, -0x70000000), 4),
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| 87 | -0x60000000)
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| 88 |
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| 89 | def test_avgpp(self):
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| 90 | for w in 1, 2, 4:
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| 91 | self.assertEqual(audioop.avgpp(b'', w), 0)
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| 92 | self.assertEqual(audioop.avgpp(packs[w](*range(100)), w), 0)
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| 93 | self.assertEqual(audioop.avgpp(packs[w](9, 10, 5, 5, 0, 1), w), 10)
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| 94 | self.assertEqual(audioop.avgpp(datas[1], 1), 196)
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| 95 | self.assertEqual(audioop.avgpp(datas[2], 2), 50534)
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| 96 | self.assertEqual(audioop.avgpp(datas[4], 4), 3311897002)
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| 97 |
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| 98 | def test_rms(self):
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| 99 | for w in 1, 2, 4:
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| 100 | self.assertEqual(audioop.rms(b'', w), 0)
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| 101 | p = packs[w]
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| 102 | self.assertEqual(audioop.rms(p(*range(100)), w), 57)
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| 103 | self.assertAlmostEqual(audioop.rms(p(maxvalues[w]) * 5, w),
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| 104 | maxvalues[w], delta=1)
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| 105 | self.assertAlmostEqual(audioop.rms(p(minvalues[w]) * 5, w),
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| 106 | -minvalues[w], delta=1)
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| 107 | self.assertEqual(audioop.rms(datas[1], 1), 77)
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| 108 | self.assertEqual(audioop.rms(datas[2], 2), 20001)
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| 109 | self.assertEqual(audioop.rms(datas[4], 4), 1310854152)
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| 110 |
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| 111 | def test_cross(self):
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| 112 | for w in 1, 2, 4:
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| 113 | self.assertEqual(audioop.cross(b'', w), -1)
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| 114 | p = packs[w]
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| 115 | self.assertEqual(audioop.cross(p(0, 1, 2), w), 0)
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| 116 | self.assertEqual(audioop.cross(p(1, 2, -3, -4), w), 1)
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| 117 | self.assertEqual(audioop.cross(p(-1, -2, 3, 4), w), 1)
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| 118 | self.assertEqual(audioop.cross(p(0, minvalues[w]), w), 1)
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| 119 | self.assertEqual(audioop.cross(p(minvalues[w], maxvalues[w]), w), 1)
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| 120 |
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| 121 | def test_add(self):
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| 122 | for w in 1, 2, 4:
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| 123 | self.assertEqual(audioop.add(b'', b'', w), b'')
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| 124 | self.assertEqual(audioop.add(datas[w], b'\0' * len(datas[w]), w),
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| 125 | datas[w])
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| 126 | self.assertEqual(audioop.add(datas[1], datas[1], 1),
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| 127 | b'\x00\x24\x7f\x80\x7f\x80\xfe')
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| 128 | self.assertEqual(audioop.add(datas[2], datas[2], 2),
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| 129 | packs[2](0, 0x2468, 0x7fff, -0x8000, 0x7fff, -0x8000, -2))
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| 130 | self.assertEqual(audioop.add(datas[4], datas[4], 4),
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| 131 | packs[4](0, 0x2468acf0, 0x7fffffff, -0x80000000,
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| 132 | 0x7fffffff, -0x80000000, -2))
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| 133 |
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| 134 | def test_bias(self):
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| 135 | for w in 1, 2, 4:
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| 136 | for bias in 0, 1, -1, 127, -128, 0x7fffffff, -0x80000000:
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| 137 | self.assertEqual(audioop.bias(b'', w, bias), b'')
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| 138 | self.assertEqual(audioop.bias(datas[1], 1, 1),
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| 139 | b'\x01\x13\x46\xbc\x80\x81\x00')
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| 140 | self.assertEqual(audioop.bias(datas[1], 1, -1),
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| 141 | b'\xff\x11\x44\xba\x7e\x7f\xfe')
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| 142 | self.assertEqual(audioop.bias(datas[1], 1, 0x7fffffff),
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| 143 | b'\xff\x11\x44\xba\x7e\x7f\xfe')
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| 144 | self.assertEqual(audioop.bias(datas[1], 1, -0x80000000),
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| 145 | datas[1])
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| 146 | self.assertEqual(audioop.bias(datas[2], 2, 1),
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| 147 | packs[2](1, 0x1235, 0x4568, -0x4566, -0x8000, -0x7fff, 0))
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| 148 | self.assertEqual(audioop.bias(datas[2], 2, -1),
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| 149 | packs[2](-1, 0x1233, 0x4566, -0x4568, 0x7ffe, 0x7fff, -2))
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| 150 | self.assertEqual(audioop.bias(datas[2], 2, 0x7fffffff),
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| 151 | packs[2](-1, 0x1233, 0x4566, -0x4568, 0x7ffe, 0x7fff, -2))
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| 152 | self.assertEqual(audioop.bias(datas[2], 2, -0x80000000),
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| 153 | datas[2])
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| 154 | self.assertEqual(audioop.bias(datas[4], 4, 1),
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| 155 | packs[4](1, 0x12345679, 0x456789ac, -0x456789aa,
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| 156 | -0x80000000, -0x7fffffff, 0))
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| 157 | self.assertEqual(audioop.bias(datas[4], 4, -1),
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| 158 | packs[4](-1, 0x12345677, 0x456789aa, -0x456789ac,
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| 159 | 0x7ffffffe, 0x7fffffff, -2))
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| 160 | self.assertEqual(audioop.bias(datas[4], 4, 0x7fffffff),
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| 161 | packs[4](0x7fffffff, -0x6dcba989, -0x3a987656, 0x3a987654,
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| 162 | -2, -1, 0x7ffffffe))
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| 163 | self.assertEqual(audioop.bias(datas[4], 4, -0x80000000),
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| 164 | packs[4](-0x80000000, -0x6dcba988, -0x3a987655, 0x3a987655,
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| 165 | -1, 0, 0x7fffffff))
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| 166 |
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| 167 | def test_lin2lin(self):
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| 168 | for w in 1, 2, 4:
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| 169 | self.assertEqual(audioop.lin2lin(datas[w], w, w), datas[w])
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| 170 |
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| 171 | self.assertEqual(audioop.lin2lin(datas[1], 1, 2),
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| 172 | packs[2](0, 0x1200, 0x4500, -0x4500, 0x7f00, -0x8000, -0x100))
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| 173 | self.assertEqual(audioop.lin2lin(datas[1], 1, 4),
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| 174 | packs[4](0, 0x12000000, 0x45000000, -0x45000000,
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| 175 | 0x7f000000, -0x80000000, -0x1000000))
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| 176 | self.assertEqual(audioop.lin2lin(datas[2], 2, 1),
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| 177 | b'\x00\x12\x45\xba\x7f\x80\xff')
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| 178 | self.assertEqual(audioop.lin2lin(datas[2], 2, 4),
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| 179 | packs[4](0, 0x12340000, 0x45670000, -0x45670000,
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| 180 | 0x7fff0000, -0x80000000, -0x10000))
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| 181 | self.assertEqual(audioop.lin2lin(datas[4], 4, 1),
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| 182 | b'\x00\x12\x45\xba\x7f\x80\xff')
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| 183 | self.assertEqual(audioop.lin2lin(datas[4], 4, 2),
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| 184 | packs[2](0, 0x1234, 0x4567, -0x4568, 0x7fff, -0x8000, -1))
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| 185 |
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| 186 | def test_adpcm2lin(self):
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| 187 | self.assertEqual(audioop.adpcm2lin(b'\x07\x7f\x7f', 1, None),
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| 188 | (b'\x00\x00\x00\xff\x00\xff', (-179, 40)))
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| 189 | self.assertEqual(audioop.adpcm2lin(b'\x07\x7f\x7f', 2, None),
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| 190 | (packs[2](0, 0xb, 0x29, -0x16, 0x72, -0xb3), (-179, 40)))
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| 191 | self.assertEqual(audioop.adpcm2lin(b'\x07\x7f\x7f', 4, None),
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| 192 | (packs[4](0, 0xb0000, 0x290000, -0x160000, 0x720000,
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| 193 | -0xb30000), (-179, 40)))
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| 194 |
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| 195 | # Very cursory test
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| 196 | for w in 1, 2, 4:
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| 197 | self.assertEqual(audioop.adpcm2lin(b'\0' * 5, w, None),
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| 198 | (b'\0' * w * 10, (0, 0)))
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| 199 |
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| 200 | def test_lin2adpcm(self):
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| 201 | self.assertEqual(audioop.lin2adpcm(datas[1], 1, None),
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| 202 | (b'\x07\x7f\x7f', (-221, 39)))
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| 203 | self.assertEqual(audioop.lin2adpcm(datas[2], 2, None),
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| 204 | (b'\x07\x7f\x7f', (31, 39)))
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| 205 | self.assertEqual(audioop.lin2adpcm(datas[4], 4, None),
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| 206 | (b'\x07\x7f\x7f', (31, 39)))
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| 207 |
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| 208 | # Very cursory test
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| 209 | for w in 1, 2, 4:
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| 210 | self.assertEqual(audioop.lin2adpcm(b'\0' * w * 10, w, None),
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| 211 | (b'\0' * 5, (0, 0)))
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| 212 |
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| 213 | def test_lin2alaw(self):
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| 214 | self.assertEqual(audioop.lin2alaw(datas[1], 1),
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| 215 | b'\xd5\x87\xa4\x24\xaa\x2a\x5a')
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| 216 | self.assertEqual(audioop.lin2alaw(datas[2], 2),
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| 217 | b'\xd5\x87\xa4\x24\xaa\x2a\x55')
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| 218 | self.assertEqual(audioop.lin2alaw(datas[4], 4),
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| 219 | b'\xd5\x87\xa4\x24\xaa\x2a\x55')
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| 220 |
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| 221 | def test_alaw2lin(self):
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| 222 | encoded = b'\x00\x03\x24\x2a\x51\x54\x55\x58\x6b\x71\x7f'\
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| 223 | b'\x80\x83\xa4\xaa\xd1\xd4\xd5\xd8\xeb\xf1\xff'
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| 224 | src = [-688, -720, -2240, -4032, -9, -3, -1, -27, -244, -82, -106,
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| 225 | 688, 720, 2240, 4032, 9, 3, 1, 27, 244, 82, 106]
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| 226 | for w in 1, 2, 4:
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| 227 | self.assertEqual(audioop.alaw2lin(encoded, w),
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| 228 | packs[w](*(x << (w * 8) >> 13 for x in src)))
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| 229 |
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| 230 | encoded = ''.join(chr(x) for x in xrange(256))
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| 231 | for w in 2, 4:
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| 232 | decoded = audioop.alaw2lin(encoded, w)
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| 233 | self.assertEqual(audioop.lin2alaw(decoded, w), encoded)
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| 234 |
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| 235 | def test_lin2ulaw(self):
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| 236 | self.assertEqual(audioop.lin2ulaw(datas[1], 1),
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| 237 | b'\xff\xad\x8e\x0e\x80\x00\x67')
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| 238 | self.assertEqual(audioop.lin2ulaw(datas[2], 2),
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| 239 | b'\xff\xad\x8e\x0e\x80\x00\x7e')
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| 240 | self.assertEqual(audioop.lin2ulaw(datas[4], 4),
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| 241 | b'\xff\xad\x8e\x0e\x80\x00\x7e')
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| 242 |
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| 243 | def test_ulaw2lin(self):
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| 244 | encoded = b'\x00\x0e\x28\x3f\x57\x6a\x76\x7c\x7e\x7f'\
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| 245 | b'\x80\x8e\xa8\xbf\xd7\xea\xf6\xfc\xfe\xff'
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| 246 | src = [-8031, -4447, -1471, -495, -163, -53, -18, -6, -2, 0,
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| 247 | 8031, 4447, 1471, 495, 163, 53, 18, 6, 2, 0]
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| 248 | for w in 1, 2, 4:
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| 249 | self.assertEqual(audioop.ulaw2lin(encoded, w),
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| 250 | packs[w](*(x << (w * 8) >> 14 for x in src)))
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| 251 |
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| 252 | # Current u-law implementation has two codes fo 0: 0x7f and 0xff.
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| 253 | encoded = ''.join(chr(x) for x in range(127) + range(128, 256))
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| 254 | for w in 2, 4:
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| 255 | decoded = audioop.ulaw2lin(encoded, w)
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| 256 | self.assertEqual(audioop.lin2ulaw(decoded, w), encoded)
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| 257 |
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| 258 | def test_mul(self):
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| 259 | for w in 1, 2, 4:
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| 260 | self.assertEqual(audioop.mul(b'', w, 2), b'')
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| 261 | self.assertEqual(audioop.mul(datas[w], w, 0),
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| 262 | b'\0' * len(datas[w]))
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| 263 | self.assertEqual(audioop.mul(datas[w], w, 1),
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| 264 | datas[w])
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| 265 | self.assertEqual(audioop.mul(datas[1], 1, 2),
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| 266 | b'\x00\x24\x7f\x80\x7f\x80\xfe')
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| 267 | self.assertEqual(audioop.mul(datas[2], 2, 2),
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| 268 | packs[2](0, 0x2468, 0x7fff, -0x8000, 0x7fff, -0x8000, -2))
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| 269 | self.assertEqual(audioop.mul(datas[4], 4, 2),
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| 270 | packs[4](0, 0x2468acf0, 0x7fffffff, -0x80000000,
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| 271 | 0x7fffffff, -0x80000000, -2))
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| 272 |
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| 273 | def test_ratecv(self):
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| 274 | for w in 1, 2, 4:
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| 275 | self.assertEqual(audioop.ratecv(b'', w, 1, 8000, 8000, None),
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| 276 | (b'', (-1, ((0, 0),))))
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| 277 | self.assertEqual(audioop.ratecv(b'', w, 5, 8000, 8000, None),
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| 278 | (b'', (-1, ((0, 0),) * 5)))
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| 279 | self.assertEqual(audioop.ratecv(b'', w, 1, 8000, 16000, None),
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| 280 | (b'', (-2, ((0, 0),))))
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| 281 | self.assertEqual(audioop.ratecv(datas[w], w, 1, 8000, 8000, None)[0],
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| 282 | datas[w])
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| 283 | state = None
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| 284 | d1, state = audioop.ratecv(b'\x00\x01\x02', 1, 1, 8000, 16000, state)
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| 285 | d2, state = audioop.ratecv(b'\x00\x01\x02', 1, 1, 8000, 16000, state)
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| 286 | self.assertEqual(d1 + d2, b'\000\000\001\001\002\001\000\000\001\001\002')
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| 287 |
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| 288 | for w in 1, 2, 4:
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| 289 | d0, state0 = audioop.ratecv(datas[w], w, 1, 8000, 16000, None)
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| 290 | d, state = b'', None
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| 291 | for i in range(0, len(datas[w]), w):
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| 292 | d1, state = audioop.ratecv(datas[w][i:i + w], w, 1,
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| 293 | 8000, 16000, state)
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| 294 | d += d1
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| 295 | self.assertEqual(d, d0)
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| 296 | self.assertEqual(state, state0)
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| 297 |
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| 298 | def test_reverse(self):
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| 299 | for w in 1, 2, 4:
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| 300 | self.assertEqual(audioop.reverse(b'', w), b'')
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| 301 | self.assertEqual(audioop.reverse(packs[w](0, 1, 2), w),
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| 302 | packs[w](2, 1, 0))
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| 303 |
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| 304 | def test_tomono(self):
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| 305 | for w in 1, 2, 4:
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| 306 | data1 = datas[w]
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| 307 | data2 = bytearray(2 * len(data1))
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| 308 | for k in range(w):
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| 309 | data2[k::2*w] = data1[k::w]
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| 310 | self.assertEqual(audioop.tomono(str(data2), w, 1, 0), data1)
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| 311 | self.assertEqual(audioop.tomono(str(data2), w, 0, 1), b'\0' * len(data1))
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| 312 | for k in range(w):
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| 313 | data2[k+w::2*w] = data1[k::w]
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| 314 | self.assertEqual(audioop.tomono(str(data2), w, 0.5, 0.5), data1)
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| 315 |
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| 316 | def test_tostereo(self):
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| 317 | for w in 1, 2, 4:
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| 318 | data1 = datas[w]
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| 319 | data2 = bytearray(2 * len(data1))
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| 320 | for k in range(w):
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| 321 | data2[k::2*w] = data1[k::w]
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| 322 | self.assertEqual(audioop.tostereo(data1, w, 1, 0), data2)
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| 323 | self.assertEqual(audioop.tostereo(data1, w, 0, 0), b'\0' * len(data2))
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| 324 | for k in range(w):
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| 325 | data2[k+w::2*w] = data1[k::w]
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| 326 | self.assertEqual(audioop.tostereo(data1, w, 1, 1), data2)
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| 327 |
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| 328 | def test_findfactor(self):
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| 329 | self.assertEqual(audioop.findfactor(datas[2], datas[2]), 1.0)
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| 330 | self.assertEqual(audioop.findfactor(b'\0' * len(datas[2]), datas[2]),
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| 331 | 0.0)
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| 332 |
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| 333 | def test_findfit(self):
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| 334 | self.assertEqual(audioop.findfit(datas[2], datas[2]), (0, 1.0))
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| 335 | self.assertEqual(audioop.findfit(datas[2], packs[2](1, 2, 0)),
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| 336 | (1, 8038.8))
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| 337 | self.assertEqual(audioop.findfit(datas[2][:-2] * 5 + datas[2], datas[2]),
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| 338 | (30, 1.0))
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| 339 |
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| 340 | def test_findmax(self):
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| 341 | self.assertEqual(audioop.findmax(datas[2], 1), 5)
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| 342 |
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| 343 | def test_getsample(self):
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| 344 | for w in 1, 2, 4:
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| 345 | data = packs[w](0, 1, -1, maxvalues[w], minvalues[w])
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| 346 | self.assertEqual(audioop.getsample(data, w, 0), 0)
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| 347 | self.assertEqual(audioop.getsample(data, w, 1), 1)
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| 348 | self.assertEqual(audioop.getsample(data, w, 2), -1)
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| 349 | self.assertEqual(audioop.getsample(data, w, 3), maxvalues[w])
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| 350 | self.assertEqual(audioop.getsample(data, w, 4), minvalues[w])
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| 351 |
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| 352 | def test_negativelen(self):
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| 353 | # from issue 3306, previously it segfaulted
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| 354 | self.assertRaises(audioop.error,
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| 355 | audioop.findmax, ''.join( chr(x) for x in xrange(256)), -2392392)
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| 356 |
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| 357 | def test_issue7673(self):
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| 358 | state = None
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| 359 | for data, size in INVALID_DATA:
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| 360 | size2 = size
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| 361 | self.assertRaises(audioop.error, audioop.getsample, data, size, 0)
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| 362 | self.assertRaises(audioop.error, audioop.max, data, size)
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| 363 | self.assertRaises(audioop.error, audioop.minmax, data, size)
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| 364 | self.assertRaises(audioop.error, audioop.avg, data, size)
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| 365 | self.assertRaises(audioop.error, audioop.rms, data, size)
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| 366 | self.assertRaises(audioop.error, audioop.avgpp, data, size)
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| 367 | self.assertRaises(audioop.error, audioop.maxpp, data, size)
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| 368 | self.assertRaises(audioop.error, audioop.cross, data, size)
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| 369 | self.assertRaises(audioop.error, audioop.mul, data, size, 1.0)
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| 370 | self.assertRaises(audioop.error, audioop.tomono, data, size, 0.5, 0.5)
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| 371 | self.assertRaises(audioop.error, audioop.tostereo, data, size, 0.5, 0.5)
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| 372 | self.assertRaises(audioop.error, audioop.add, data, data, size)
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| 373 | self.assertRaises(audioop.error, audioop.bias, data, size, 0)
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| 374 | self.assertRaises(audioop.error, audioop.reverse, data, size)
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|---|
| 375 | self.assertRaises(audioop.error, audioop.lin2lin, data, size, size2)
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|---|
| 376 | self.assertRaises(audioop.error, audioop.ratecv, data, size, 1, 1, 1, state)
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| 377 | self.assertRaises(audioop.error, audioop.lin2ulaw, data, size)
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|---|
| 378 | self.assertRaises(audioop.error, audioop.lin2alaw, data, size)
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|---|
| 379 | self.assertRaises(audioop.error, audioop.lin2adpcm, data, size, state)
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|---|
| 380 |
|
|---|
| 381 | def test_wrongsize(self):
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|---|
| 382 | data = b'abcdefgh'
|
|---|
| 383 | state = None
|
|---|
| 384 | for size in (-1, 0, 3, 5, 1024):
|
|---|
| 385 | self.assertRaises(audioop.error, audioop.ulaw2lin, data, size)
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|---|
| 386 | self.assertRaises(audioop.error, audioop.alaw2lin, data, size)
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|---|
| 387 | self.assertRaises(audioop.error, audioop.adpcm2lin, data, size, state)
|
|---|
| 388 |
|
|---|
| 389 | def test_main():
|
|---|
| 390 | run_unittest(TestAudioop)
|
|---|
| 391 |
|
|---|
| 392 | if __name__ == '__main__':
|
|---|
| 393 | test_main()
|
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