Пример #1
0
        public void Write(RtpPacket packet)
        {
            lock (_lock)
            {
                var delta = _codec != null ? (short)(packet.SequenceNumber - _lastSeqNumber) : (short)1;

                if (Math.Abs(delta) >= _bufferSize)
                {
                    ResetBuffer();
                    delta = 1;
                }

                if (_codec == null)
                {
                    _lastSeqNumber = packet.SequenceNumber - 1;
                    _readSeqNumber = packet.SequenceNumber;
                }

                if (_codec == null || _lastPayloadType != packet.PayloadType)
                {
                    _codec?.Dispose();
                    _codec = _codecFactory(packet.PayloadType);

                    _packetDuration = _codec.CalcSamplesNumber(packet.Payload, 0, packet.Payload.Length);
                    if (_samples == null || _samples.Length < _packetDuration)
                    {
                        _samples = new short[_packetDuration];
                    }

                    _bufferSize = (2 * _playBuffer + _packetDuration - 1) / _packetDuration;
                    if (_packets == null || _packets.Length < _bufferSize)
                    {
                        _packets = new RtpPacket[_bufferSize];
                    }

                    _lastPayloadType = packet.PayloadType;
                }

                _packets[(_lastSeqNumber + delta) % _bufferSize] = packet;
                if (delta > 0)
                {
                    _lastSeqNumber += delta;
                }
                if (_lastSeqNumber - _readSeqNumber >= _bufferSize)
                {
                    _readSeqNumber = _lastSeqNumber - _bufferSize + 1;
                }
            }
        }