Double session restart on packet delay

gavv commented 6 years ago

The following happens.

1.

packets are delayed for a while
latency becomes too low (negative)
the session is terminated

2.

those delayed and already outdated packets are delivered
a new session is created
since there are enough packets, the session is started immediately

3.

fresh packets are delivered
latency becomes too high
the session is terminated

4.

more fresh packets are delivered
a new session is created and finally playback continues normally

gavv commented 6 years ago

The problem is that when we receive packets for a new session, we can't detect that they're already outdated.

gavv commented 6 years ago

D: [alsa-sink-USB Audio] roc_audio: latency monitor: latency=8832 target=8640 fe=0.99995 trim_fe=0.99995 adj_fe=0.99995
D: [alsa-sink-USB Audio] roc_audio: latency monitor: latency=8576 target=8640 fe=0.99995 trim_fe=0.99995 adj_fe=0.99995
D: [alsa-sink-USB Audio] roc_audio: latency monitor: latency=9408 target=8640 fe=0.99991 trim_fe=0.99991 adj_fe=0.99991
D: [alsa-sink-USB Audio] roc_audio: latency monitor: latency out of bounds: latency=-9216, min=-8640
I: [alsa-sink-USB Audio] roc_pipeline: receiver: removing session
I: [alsa-sink-USB Audio] roc_pipeline: receiver: creating session
D: [alsa-sink-USB Audio] roc_pipeline: receiver: dropping repair packet for non-existent session
D: [alsa-sink-USB Audio] roc_pipeline: receiver: can't route packet, dropping
I: [alsa-sink-USB Audio] roc_pipeline: receiver: creating session
D: [alsa-sink-USB Audio] roc_pipeline: receiver: dropping repair packet for non-existent session
D: [alsa-sink-USB Audio] roc_pipeline: receiver: can't route packet, dropping
I: [alsa-sink-USB Audio] roc_pipeline: receiver: creating session
D: [alsa-sink-USB Audio] roc_pipeline: receiver: dropping repair packet for non-existent session
D: [alsa-sink-USB Audio] roc_pipeline: receiver: can't route packet, dropping
I: [alsa-sink-USB Audio] roc_pipeline: receiver: creating session
D: [alsa-sink-USB Audio] roc_packet: delayed reader: initializing: delay=8640
D: [alsa-sink-USB Audio] roc_fec: of decoder: initializing Reed-Solomon decoder
D: [alsa-sink-USB Audio] roc_audio: resampler: initializing window
D: [alsa-sink-USB Audio] roc_audio: latency monitor: initializing: target_latency=8640 in_rate=44100 out_rate=44100
D: [alsa-sink-USB Audio] roc_packet: router: detected new stream: source=1537904675 flags=0x8u
D: [alsa-sink-USB Audio] roc_audio: depacketizer: ts=128 loss_ratio=0.00000
D: [alsa-sink-USB Audio] roc_packet: router: detected new stream: source=1805507153 flags=0x10u
D: [alsa-sink-USB Audio] roc_packet: delayed reader: initial queue: delay=8640 queue=12800 packets=40
D: [alsa-sink-USB Audio] roc_packet: delayed reader: trimmed queue: delay=8640 queue=8640 packets=27
D: [alsa-sink-USB Audio] roc_fec: fec reader: repair queue: dropped=10
D: [alsa-sink-USB Audio] roc_audio: depacketizer: got first packet: zero_samples=18304
D: [alsa-sink-USB Audio] roc_audio: latency monitor: latency=18752 target=8640 fe=1.00000 trim_fe=1.00000 adj_fe=1.00000
D: [alsa-sink-USB Audio] roc_fec: fec reader: got first packet in a block, start decoding: n_packets_before=7 blk_sn=30035
D: [alsa-sink-USB Audio] roc_audio: latency monitor: latency out of bounds: latency=29120, max=25920
I: [alsa-sink-USB Audio] roc_pipeline: receiver: removing session
I: [alsa-sink-USB Audio] roc_pipeline: receiver: creating session
D: [alsa-sink-USB Audio] roc_packet: delayed reader: initializing: delay=8640
D: [alsa-sink-USB Audio] roc_fec: of decoder: initializing Reed-Solomon decoder
D: [alsa-sink-USB Audio] roc_audio: resampler: initializing window
D: [alsa-sink-USB Audio] roc_audio: latency monitor: initializing: target_latency=8640 in_rate=44100 out_rate=44100
D: [alsa-sink-USB Audio] roc_packet: router: detected new stream: source=1537904675 flags=0x8u
D: [alsa-sink-USB Audio] roc_packet: router: detected new stream: source=1805507153 flags=0x10u
D: [alsa-sink-USB Audio] roc_packet: delayed reader: initial queue: delay=8640 queue=13120 packets=41
D: [alsa-sink-USB Audio] roc_packet: delayed reader: trimmed queue: delay=8640 queue=8640 packets=27
D: [alsa-sink-USB Audio] roc_fec: fec reader: repair queue: dropped=10
D: [alsa-sink-USB Audio] roc_audio: depacketizer: got first packet: zero_samples=0
D: [alsa-sink-USB Audio] roc_audio: depacketizer: ts=1692045923 loss_ratio=0.00000
D: [alsa-sink-USB Audio] roc_audio: latency monitor: latency=7232 target=8640 fe=1.00000 trim_fe=1.00000 adj_fe=1.00000

roc-streaming / roc-toolkit

Double session restart on packet delay #137