def _parse_adif(self, fileobj): r = BitReader(fileobj) try: copyright_id_present = r.bits(1) if copyright_id_present: r.skip(72) # copyright_id r.skip(1 + 1) # original_copy, home bitstream_type = r.bits(1) self.bitrate = r.bits(23) npce = r.bits(4) if bitstream_type == 0: r.skip(20) # adif_buffer_fullness pce = ProgramConfigElement(r) try: self.sample_rate = _FREQS[pce.sampling_frequency_index] except IndexError: pass self.channels = pce.channels # other pces.. for i in range(npce): ProgramConfigElement(r) r.align() except BitReaderError as e: raise AACError(e) # use bitrate + data size to guess length start = fileobj.tell() fileobj.seek(0, 2) length = fileobj.tell() - start if self.bitrate != 0: self.length = (8.0 * length) / self.bitrate
def _parse_adif(self, fileobj): r = BitReader(fileobj) try: copyright_id_present = r.bits(1) if copyright_id_present: r.skip(72) # copyright_id r.skip(1 + 1) # original_copy, home bitstream_type = r.bits(1) self.bitrate = r.bits(23) npce = r.bits(4) if bitstream_type == 0: r.skip(20) # adif_buffer_fullness pce = ProgramConfigElement(r) try: self.sample_rate = _FREQS[pce.sampling_frequency_index] except IndexError: pass self.channels = pce.channels # other pces.. for i in xrange(npce): ProgramConfigElement(r) r.align() except BitReaderError as e: raise AACError(e) # use bitrate + data size to guess length start = fileobj.tell() fileobj.seek(0, 2) length = fileobj.tell() - start if self.bitrate != 0: self.length = (8.0 * length) / self.bitrate
def test_get_position(self): r = BitReader(cBytesIO(b"\xAB\xCD")) self.assertEqual(r.get_position(), 0) r.bits(3) self.assertEqual(r.get_position(), 3) r.skip(9) self.assertEqual(r.get_position(), 3 + 9) r.align() self.assertEqual(r.get_position(), 16)
def test_get_position(self): r = BitReader(BytesIO(b"\xAB\xCD")) self.assertEqual(r.get_position(), 0) r.bits(3) self.assertEqual(r.get_position(), 3) r.skip(9) self.assertEqual(r.get_position(), 3 + 9) r.align() self.assertEqual(r.get_position(), 16)
def test_align(self): r = BitReader(cBytesIO(b"\xAB\xCD\xEF")) r.skip(3) self.assertEqual(r.align(), 5) self.assertEqual(r.get_position(), 8)
def test_align(self): r = BitReader(BytesIO(b"\xAB\xCD\xEF")) r.skip(3) self.assertEqual(r.align(), 5) self.assertEqual(r.get_position(), 8)