| import audioop |
| import sys |
| import unittest |
| import struct |
| from test.test_support import run_unittest |
| |
| |
| formats = { |
| 1: 'b', |
| 2: 'h', |
| 4: 'i', |
| } |
| |
| def pack(width, data): |
| return struct.pack('=%d%s' % (len(data), formats[width]), *data) |
| |
| packs = { |
| 1: lambda *data: pack(1, data), |
| 2: lambda *data: pack(2, data), |
| 4: lambda *data: pack(4, data), |
| } |
| maxvalues = {w: (1 << (8 * w - 1)) - 1 for w in (1, 2, 4)} |
| minvalues = {w: -1 << (8 * w - 1) for w in (1, 2, 4)} |
| |
| datas = { |
| 1: b'\x00\x12\x45\xbb\x7f\x80\xff', |
| 2: packs[2](0, 0x1234, 0x4567, -0x4567, 0x7fff, -0x8000, -1), |
| 4: packs[4](0, 0x12345678, 0x456789ab, -0x456789ab, |
| 0x7fffffff, -0x80000000, -1), |
| } |
| |
| INVALID_DATA = [ |
| (b'abc', 0), |
| (b'abc', 2), |
| (b'abc', 4), |
| ] |
| |
| |
| class TestAudioop(unittest.TestCase): |
| |
| def test_max(self): |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.max(b'', w), 0) |
| p = packs[w] |
| self.assertEqual(audioop.max(p(5), w), 5) |
| self.assertEqual(audioop.max(p(5, -8, -1), w), 8) |
| self.assertEqual(audioop.max(p(maxvalues[w]), w), maxvalues[w]) |
| self.assertEqual(audioop.max(p(minvalues[w]), w), -minvalues[w]) |
| self.assertEqual(audioop.max(datas[w], w), -minvalues[w]) |
| |
| def test_minmax(self): |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.minmax(b'', w), |
| (0x7fffffff, -0x80000000)) |
| p = packs[w] |
| self.assertEqual(audioop.minmax(p(5), w), (5, 5)) |
| self.assertEqual(audioop.minmax(p(5, -8, -1), w), (-8, 5)) |
| self.assertEqual(audioop.minmax(p(maxvalues[w]), w), |
| (maxvalues[w], maxvalues[w])) |
| self.assertEqual(audioop.minmax(p(minvalues[w]), w), |
| (minvalues[w], minvalues[w])) |
| self.assertEqual(audioop.minmax(datas[w], w), |
| (minvalues[w], maxvalues[w])) |
| |
| def test_maxpp(self): |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.maxpp(b'', w), 0) |
| self.assertEqual(audioop.maxpp(packs[w](*range(100)), w), 0) |
| self.assertEqual(audioop.maxpp(packs[w](9, 10, 5, 5, 0, 1), w), 10) |
| self.assertEqual(audioop.maxpp(datas[w], w), |
| maxvalues[w] - minvalues[w]) |
| |
| def test_avg(self): |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.avg(b'', w), 0) |
| p = packs[w] |
| self.assertEqual(audioop.avg(p(5), w), 5) |
| self .assertEqual(audioop.avg(p(5, 8), w), 6) |
| self.assertEqual(audioop.avg(p(5, -8), w), -2) |
| self.assertEqual(audioop.avg(p(maxvalues[w], maxvalues[w]), w), |
| maxvalues[w]) |
| self.assertEqual(audioop.avg(p(minvalues[w], minvalues[w]), w), |
| minvalues[w]) |
| self.assertEqual(audioop.avg(packs[4](0x50000000, 0x70000000), 4), |
| 0x60000000) |
| self.assertEqual(audioop.avg(packs[4](-0x50000000, -0x70000000), 4), |
| -0x60000000) |
| |
| def test_avgpp(self): |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.avgpp(b'', w), 0) |
| self.assertEqual(audioop.avgpp(packs[w](*range(100)), w), 0) |
| self.assertEqual(audioop.avgpp(packs[w](9, 10, 5, 5, 0, 1), w), 10) |
| self.assertEqual(audioop.avgpp(datas[1], 1), 196) |
| self.assertEqual(audioop.avgpp(datas[2], 2), 50534) |
| self.assertEqual(audioop.avgpp(datas[4], 4), 3311897002) |
| |
| def test_rms(self): |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.rms(b'', w), 0) |
| p = packs[w] |
| self.assertEqual(audioop.rms(p(*range(100)), w), 57) |
| self.assertAlmostEqual(audioop.rms(p(maxvalues[w]) * 5, w), |
| maxvalues[w], delta=1) |
| self.assertAlmostEqual(audioop.rms(p(minvalues[w]) * 5, w), |
| -minvalues[w], delta=1) |
| self.assertEqual(audioop.rms(datas[1], 1), 77) |
| self.assertEqual(audioop.rms(datas[2], 2), 20001) |
| self.assertEqual(audioop.rms(datas[4], 4), 1310854152) |
| |
| def test_cross(self): |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.cross(b'', w), -1) |
| p = packs[w] |
| self.assertEqual(audioop.cross(p(0, 1, 2), w), 0) |
| self.assertEqual(audioop.cross(p(1, 2, -3, -4), w), 1) |
| self.assertEqual(audioop.cross(p(-1, -2, 3, 4), w), 1) |
| self.assertEqual(audioop.cross(p(0, minvalues[w]), w), 1) |
| self.assertEqual(audioop.cross(p(minvalues[w], maxvalues[w]), w), 1) |
| |
| def test_add(self): |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.add(b'', b'', w), b'') |
| self.assertEqual(audioop.add(datas[w], b'\0' * len(datas[w]), w), |
| datas[w]) |
| self.assertEqual(audioop.add(datas[1], datas[1], 1), |
| b'\x00\x24\x7f\x80\x7f\x80\xfe') |
| self.assertEqual(audioop.add(datas[2], datas[2], 2), |
| packs[2](0, 0x2468, 0x7fff, -0x8000, 0x7fff, -0x8000, -2)) |
| self.assertEqual(audioop.add(datas[4], datas[4], 4), |
| packs[4](0, 0x2468acf0, 0x7fffffff, -0x80000000, |
| 0x7fffffff, -0x80000000, -2)) |
| |
| def test_bias(self): |
| for w in 1, 2, 4: |
| for bias in 0, 1, -1, 127, -128, 0x7fffffff, -0x80000000: |
| self.assertEqual(audioop.bias(b'', w, bias), b'') |
| self.assertEqual(audioop.bias(datas[1], 1, 1), |
| b'\x01\x13\x46\xbc\x80\x81\x00') |
| self.assertEqual(audioop.bias(datas[1], 1, -1), |
| b'\xff\x11\x44\xba\x7e\x7f\xfe') |
| self.assertEqual(audioop.bias(datas[1], 1, 0x7fffffff), |
| b'\xff\x11\x44\xba\x7e\x7f\xfe') |
| self.assertEqual(audioop.bias(datas[1], 1, -0x80000000), |
| datas[1]) |
| self.assertEqual(audioop.bias(datas[2], 2, 1), |
| packs[2](1, 0x1235, 0x4568, -0x4566, -0x8000, -0x7fff, 0)) |
| self.assertEqual(audioop.bias(datas[2], 2, -1), |
| packs[2](-1, 0x1233, 0x4566, -0x4568, 0x7ffe, 0x7fff, -2)) |
| self.assertEqual(audioop.bias(datas[2], 2, 0x7fffffff), |
| packs[2](-1, 0x1233, 0x4566, -0x4568, 0x7ffe, 0x7fff, -2)) |
| self.assertEqual(audioop.bias(datas[2], 2, -0x80000000), |
| datas[2]) |
| self.assertEqual(audioop.bias(datas[4], 4, 1), |
| packs[4](1, 0x12345679, 0x456789ac, -0x456789aa, |
| -0x80000000, -0x7fffffff, 0)) |
| self.assertEqual(audioop.bias(datas[4], 4, -1), |
| packs[4](-1, 0x12345677, 0x456789aa, -0x456789ac, |
| 0x7ffffffe, 0x7fffffff, -2)) |
| self.assertEqual(audioop.bias(datas[4], 4, 0x7fffffff), |
| packs[4](0x7fffffff, -0x6dcba989, -0x3a987656, 0x3a987654, |
| -2, -1, 0x7ffffffe)) |
| self.assertEqual(audioop.bias(datas[4], 4, -0x80000000), |
| packs[4](-0x80000000, -0x6dcba988, -0x3a987655, 0x3a987655, |
| -1, 0, 0x7fffffff)) |
| |
| def test_lin2lin(self): |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.lin2lin(datas[w], w, w), datas[w]) |
| |
| self.assertEqual(audioop.lin2lin(datas[1], 1, 2), |
| packs[2](0, 0x1200, 0x4500, -0x4500, 0x7f00, -0x8000, -0x100)) |
| self.assertEqual(audioop.lin2lin(datas[1], 1, 4), |
| packs[4](0, 0x12000000, 0x45000000, -0x45000000, |
| 0x7f000000, -0x80000000, -0x1000000)) |
| self.assertEqual(audioop.lin2lin(datas[2], 2, 1), |
| b'\x00\x12\x45\xba\x7f\x80\xff') |
| self.assertEqual(audioop.lin2lin(datas[2], 2, 4), |
| packs[4](0, 0x12340000, 0x45670000, -0x45670000, |
| 0x7fff0000, -0x80000000, -0x10000)) |
| self.assertEqual(audioop.lin2lin(datas[4], 4, 1), |
| b'\x00\x12\x45\xba\x7f\x80\xff') |
| self.assertEqual(audioop.lin2lin(datas[4], 4, 2), |
| packs[2](0, 0x1234, 0x4567, -0x4568, 0x7fff, -0x8000, -1)) |
| |
| def test_adpcm2lin(self): |
| self.assertEqual(audioop.adpcm2lin(b'\x07\x7f\x7f', 1, None), |
| (b'\x00\x00\x00\xff\x00\xff', (-179, 40))) |
| self.assertEqual(audioop.adpcm2lin(b'\x07\x7f\x7f', 2, None), |
| (packs[2](0, 0xb, 0x29, -0x16, 0x72, -0xb3), (-179, 40))) |
| self.assertEqual(audioop.adpcm2lin(b'\x07\x7f\x7f', 4, None), |
| (packs[4](0, 0xb0000, 0x290000, -0x160000, 0x720000, |
| -0xb30000), (-179, 40))) |
| |
| # Very cursory test |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.adpcm2lin(b'\0' * 5, w, None), |
| (b'\0' * w * 10, (0, 0))) |
| |
| def test_lin2adpcm(self): |
| self.assertEqual(audioop.lin2adpcm(datas[1], 1, None), |
| (b'\x07\x7f\x7f', (-221, 39))) |
| self.assertEqual(audioop.lin2adpcm(datas[2], 2, None), |
| (b'\x07\x7f\x7f', (31, 39))) |
| self.assertEqual(audioop.lin2adpcm(datas[4], 4, None), |
| (b'\x07\x7f\x7f', (31, 39))) |
| |
| # Very cursory test |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.lin2adpcm(b'\0' * w * 10, w, None), |
| (b'\0' * 5, (0, 0))) |
| |
| def test_lin2alaw(self): |
| self.assertEqual(audioop.lin2alaw(datas[1], 1), |
| b'\xd5\x87\xa4\x24\xaa\x2a\x5a') |
| self.assertEqual(audioop.lin2alaw(datas[2], 2), |
| b'\xd5\x87\xa4\x24\xaa\x2a\x55') |
| self.assertEqual(audioop.lin2alaw(datas[4], 4), |
| b'\xd5\x87\xa4\x24\xaa\x2a\x55') |
| |
| def test_alaw2lin(self): |
| encoded = b'\x00\x03\x24\x2a\x51\x54\x55\x58\x6b\x71\x7f'\ |
| b'\x80\x83\xa4\xaa\xd1\xd4\xd5\xd8\xeb\xf1\xff' |
| src = [-688, -720, -2240, -4032, -9, -3, -1, -27, -244, -82, -106, |
| 688, 720, 2240, 4032, 9, 3, 1, 27, 244, 82, 106] |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.alaw2lin(encoded, w), |
| packs[w](*(x << (w * 8) >> 13 for x in src))) |
| |
| encoded = ''.join(chr(x) for x in xrange(256)) |
| for w in 2, 4: |
| decoded = audioop.alaw2lin(encoded, w) |
| self.assertEqual(audioop.lin2alaw(decoded, w), encoded) |
| |
| def test_lin2ulaw(self): |
| self.assertEqual(audioop.lin2ulaw(datas[1], 1), |
| b'\xff\xad\x8e\x0e\x80\x00\x67') |
| self.assertEqual(audioop.lin2ulaw(datas[2], 2), |
| b'\xff\xad\x8e\x0e\x80\x00\x7e') |
| self.assertEqual(audioop.lin2ulaw(datas[4], 4), |
| b'\xff\xad\x8e\x0e\x80\x00\x7e') |
| |
| def test_ulaw2lin(self): |
| encoded = b'\x00\x0e\x28\x3f\x57\x6a\x76\x7c\x7e\x7f'\ |
| b'\x80\x8e\xa8\xbf\xd7\xea\xf6\xfc\xfe\xff' |
| src = [-8031, -4447, -1471, -495, -163, -53, -18, -6, -2, 0, |
| 8031, 4447, 1471, 495, 163, 53, 18, 6, 2, 0] |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.ulaw2lin(encoded, w), |
| packs[w](*(x << (w * 8) >> 14 for x in src))) |
| |
| # Current u-law implementation has two codes fo 0: 0x7f and 0xff. |
| encoded = ''.join(chr(x) for x in range(127) + range(128, 256)) |
| for w in 2, 4: |
| decoded = audioop.ulaw2lin(encoded, w) |
| self.assertEqual(audioop.lin2ulaw(decoded, w), encoded) |
| |
| def test_mul(self): |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.mul(b'', w, 2), b'') |
| self.assertEqual(audioop.mul(datas[w], w, 0), |
| b'\0' * len(datas[w])) |
| self.assertEqual(audioop.mul(datas[w], w, 1), |
| datas[w]) |
| self.assertEqual(audioop.mul(datas[1], 1, 2), |
| b'\x00\x24\x7f\x80\x7f\x80\xfe') |
| self.assertEqual(audioop.mul(datas[2], 2, 2), |
| packs[2](0, 0x2468, 0x7fff, -0x8000, 0x7fff, -0x8000, -2)) |
| self.assertEqual(audioop.mul(datas[4], 4, 2), |
| packs[4](0, 0x2468acf0, 0x7fffffff, -0x80000000, |
| 0x7fffffff, -0x80000000, -2)) |
| |
| def test_ratecv(self): |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.ratecv(b'', w, 1, 8000, 8000, None), |
| (b'', (-1, ((0, 0),)))) |
| self.assertEqual(audioop.ratecv(b'', w, 5, 8000, 8000, None), |
| (b'', (-1, ((0, 0),) * 5))) |
| self.assertEqual(audioop.ratecv(b'', w, 1, 8000, 16000, None), |
| (b'', (-2, ((0, 0),)))) |
| self.assertEqual(audioop.ratecv(datas[w], w, 1, 8000, 8000, None)[0], |
| datas[w]) |
| state = None |
| d1, state = audioop.ratecv(b'\x00\x01\x02', 1, 1, 8000, 16000, state) |
| d2, state = audioop.ratecv(b'\x00\x01\x02', 1, 1, 8000, 16000, state) |
| self.assertEqual(d1 + d2, b'\000\000\001\001\002\001\000\000\001\001\002') |
| |
| for w in 1, 2, 4: |
| d0, state0 = audioop.ratecv(datas[w], w, 1, 8000, 16000, None) |
| d, state = b'', None |
| for i in range(0, len(datas[w]), w): |
| d1, state = audioop.ratecv(datas[w][i:i + w], w, 1, |
| 8000, 16000, state) |
| d += d1 |
| self.assertEqual(d, d0) |
| self.assertEqual(state, state0) |
| |
| def test_reverse(self): |
| for w in 1, 2, 4: |
| self.assertEqual(audioop.reverse(b'', w), b'') |
| self.assertEqual(audioop.reverse(packs[w](0, 1, 2), w), |
| packs[w](2, 1, 0)) |
| |
| def test_tomono(self): |
| for w in 1, 2, 4: |
| data1 = datas[w] |
| data2 = bytearray(2 * len(data1)) |
| for k in range(w): |
| data2[k::2*w] = data1[k::w] |
| self.assertEqual(audioop.tomono(str(data2), w, 1, 0), data1) |
| self.assertEqual(audioop.tomono(str(data2), w, 0, 1), b'\0' * len(data1)) |
| for k in range(w): |
| data2[k+w::2*w] = data1[k::w] |
| self.assertEqual(audioop.tomono(str(data2), w, 0.5, 0.5), data1) |
| |
| def test_tostereo(self): |
| for w in 1, 2, 4: |
| data1 = datas[w] |
| data2 = bytearray(2 * len(data1)) |
| for k in range(w): |
| data2[k::2*w] = data1[k::w] |
| self.assertEqual(audioop.tostereo(data1, w, 1, 0), data2) |
| self.assertEqual(audioop.tostereo(data1, w, 0, 0), b'\0' * len(data2)) |
| for k in range(w): |
| data2[k+w::2*w] = data1[k::w] |
| self.assertEqual(audioop.tostereo(data1, w, 1, 1), data2) |
| |
| def test_findfactor(self): |
| self.assertEqual(audioop.findfactor(datas[2], datas[2]), 1.0) |
| self.assertEqual(audioop.findfactor(b'\0' * len(datas[2]), datas[2]), |
| 0.0) |
| |
| def test_findfit(self): |
| self.assertEqual(audioop.findfit(datas[2], datas[2]), (0, 1.0)) |
| self.assertEqual(audioop.findfit(datas[2], packs[2](1, 2, 0)), |
| (1, 8038.8)) |
| self.assertEqual(audioop.findfit(datas[2][:-2] * 5 + datas[2], datas[2]), |
| (30, 1.0)) |
| |
| def test_findmax(self): |
| self.assertEqual(audioop.findmax(datas[2], 1), 5) |
| |
| def test_getsample(self): |
| for w in 1, 2, 4: |
| data = packs[w](0, 1, -1, maxvalues[w], minvalues[w]) |
| self.assertEqual(audioop.getsample(data, w, 0), 0) |
| self.assertEqual(audioop.getsample(data, w, 1), 1) |
| self.assertEqual(audioop.getsample(data, w, 2), -1) |
| self.assertEqual(audioop.getsample(data, w, 3), maxvalues[w]) |
| self.assertEqual(audioop.getsample(data, w, 4), minvalues[w]) |
| |
| def test_negativelen(self): |
| # from issue 3306, previously it segfaulted |
| self.assertRaises(audioop.error, |
| audioop.findmax, ''.join( chr(x) for x in xrange(256)), -2392392) |
| |
| def test_issue7673(self): |
| state = None |
| for data, size in INVALID_DATA: |
| size2 = size |
| self.assertRaises(audioop.error, audioop.getsample, data, size, 0) |
| self.assertRaises(audioop.error, audioop.max, data, size) |
| self.assertRaises(audioop.error, audioop.minmax, data, size) |
| self.assertRaises(audioop.error, audioop.avg, data, size) |
| self.assertRaises(audioop.error, audioop.rms, data, size) |
| self.assertRaises(audioop.error, audioop.avgpp, data, size) |
| self.assertRaises(audioop.error, audioop.maxpp, data, size) |
| self.assertRaises(audioop.error, audioop.cross, data, size) |
| self.assertRaises(audioop.error, audioop.mul, data, size, 1.0) |
| self.assertRaises(audioop.error, audioop.tomono, data, size, 0.5, 0.5) |
| self.assertRaises(audioop.error, audioop.tostereo, data, size, 0.5, 0.5) |
| self.assertRaises(audioop.error, audioop.add, data, data, size) |
| self.assertRaises(audioop.error, audioop.bias, data, size, 0) |
| self.assertRaises(audioop.error, audioop.reverse, data, size) |
| self.assertRaises(audioop.error, audioop.lin2lin, data, size, size2) |
| self.assertRaises(audioop.error, audioop.ratecv, data, size, 1, 1, 1, state) |
| self.assertRaises(audioop.error, audioop.lin2ulaw, data, size) |
| self.assertRaises(audioop.error, audioop.lin2alaw, data, size) |
| self.assertRaises(audioop.error, audioop.lin2adpcm, data, size, state) |
| |
| def test_wrongsize(self): |
| data = b'abcdefgh' |
| state = None |
| for size in (-1, 0, 3, 5, 1024): |
| self.assertRaises(audioop.error, audioop.ulaw2lin, data, size) |
| self.assertRaises(audioop.error, audioop.alaw2lin, data, size) |
| self.assertRaises(audioop.error, audioop.adpcm2lin, data, size, state) |
| |
| def test_main(): |
| run_unittest(TestAudioop) |
| |
| if __name__ == '__main__': |
| test_main() |
