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from aiortc.codecs import G722_CODEC, get_decoder, get_encoder
from aiortc.codecs.g722 import G722Decoder, G722Encoder
from aiortc.jitterbuffer import JitterFrame
from .codecs import CodecTestCase
# silence
G722_PAYLOAD = b"\xfa" * 160
class G722Test(CodecTestCase):
def test_decoder(self) -> None:
decoder = get_decoder(G722_CODEC)
self.assertIsInstance(decoder, G722Decoder)
frames = decoder.decode(JitterFrame(data=G722_PAYLOAD, timestamp=0))
self.assertEqual(len(frames), 1)
frame = frames[0]
self.assertAudioFrame(
frame,
data=None,
layout="mono",
pts=0,
samples=320,
sample_rate=16000,
)
def test_encoder_mono_16khz(self) -> None:
encoder = get_encoder(G722_CODEC)
self.assertIsInstance(encoder, G722Encoder)
for frame in self.create_audio_frames(
layout="mono", sample_rate=16000, count=10
):
payloads, timestamp = encoder.encode(frame)
self.assertEqual(len(payloads), 1)
self.assertEqual(len(payloads[0]), 160)
self.assertEqual(timestamp, frame.pts // 2)
def test_encoder_stereo_16khz(self) -> None:
encoder = get_encoder(G722_CODEC)
self.assertIsInstance(encoder, G722Encoder)
for frame in self.create_audio_frames(
layout="stereo", sample_rate=16000, count=10
):
payloads, timestamp = encoder.encode(frame)
self.assertEqual(len(payloads), 1)
self.assertEqual(len(payloads[0]), 160)
self.assertEqual(timestamp, frame.pts // 2)
def test_encoder_stereo_48khz(self) -> None:
encoder = get_encoder(G722_CODEC)
self.assertIsInstance(encoder, G722Encoder)
output = [
encoder.encode(frame)
for frame in self.create_audio_frames(
layout="stereo", sample_rate=48000, count=10
)
]
self.assertEqual(
[([len(p) for p in payloads], timestamp) for payloads, timestamp in output],
[
([], None), # No output due to buffering.
([160], 0),
([160], 160),
([160], 320),
([160], 480),
([160], 640),
([160], 800),
([160], 960),
([160], 1120),
([160], 1280),
],
)
def test_encoder_pack(self) -> None:
encoder = get_encoder(G722_CODEC)
self.assertTrue(isinstance(encoder, G722Encoder))
packet = self.create_packet(payload=G722_PAYLOAD, pts=1)
payloads, timestamp = encoder.pack(packet)
self.assertEqual(payloads, [G722_PAYLOAD])
self.assertEqual(timestamp, 8)
def test_roundtrip(self) -> None:
self.roundtrip_audio(G722_CODEC, layout="mono", sample_rate=16000)
def test_roundtrip_with_loss(self) -> None:
self.roundtrip_audio(G722_CODEC, layout="mono", sample_rate=16000, drop=[1])
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