Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.11/site-packages/selkies/webrtc/codecs/opus.py: 75%

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33 

34import fractions 

35 

36from ..mediastreams import convert_timebase 

37from .base import Decoder, Encoder, EncodedPacket 

38 

39SAMPLE_RATE = 48000 

40SAMPLES_PER_FRAME = 960 

41TIME_BASE = fractions.Fraction(1, SAMPLE_RATE) 

42 

43 

44class OpusDecoder(Decoder): 

45 """Opus receive codec. Decoding is done by pcmflux, which the microphone 

46 uplink is routed to as encoded frames; this registry entry carries no libav 

47 decode of its own.""" 

48 

49 

50class OpusEncoder(Encoder): 

51 """Packs pre-encoded Opus (from pcmflux) into RTP payloads.""" 

52 

53 def pack(self, packet: EncodedPacket) -> tuple[list[bytes], int, bool]: 

54 timestamp = convert_timebase(packet.pts, packet.time_base, TIME_BASE) 

55 return [bytes(packet.data)], timestamp, False