test_pastream.py 文件源码

def assert_soundfiles_equal(inp_fh, out_fh, preamble, dtype):
    delay = find_soundfile_delay(out_fh, preamble, dtype)
    assert delay != -1, "Test Preamble pattern not found"
    out_fh.seek(delay)

    mframes = 0
    blocksize = 2048
    unsigned_dtype = 'u' + dtype.lstrip('u')
    inpblk = np.zeros((blocksize, inp_fh.channels), dtype=dtype)
    for outblk in out_fh.blocks(blocksize, dtype=dtype, always_2d=True):
        readframes = inp_fh.buffer_read_into(inpblk[:len(outblk)], dtype=dtype)

        inp = inpblk[:readframes].view(unsigned_dtype)
        out = outblk.view(unsigned_dtype)

        npt.assert_array_equal(inp, out, "Loopback data mismatch")
        mframes += readframes

    print("Matched %d of %d frames; Initial delay of %d frames; %d frames truncated"
          % (mframes, len(inp_fh), delay, len(inp_fh) - inp_fh.tell()))