diff options
Diffstat (limited to 'third_party/libwebrtc/modules/pacing/pacing_controller.h')
-rw-r--r-- | third_party/libwebrtc/modules/pacing/pacing_controller.h | 44 |
1 files changed, 35 insertions, 9 deletions
diff --git a/third_party/libwebrtc/modules/pacing/pacing_controller.h b/third_party/libwebrtc/modules/pacing/pacing_controller.h index 04e0a820f9..fe6ee737a9 100644 --- a/third_party/libwebrtc/modules/pacing/pacing_controller.h +++ b/third_party/libwebrtc/modules/pacing/pacing_controller.h @@ -67,11 +67,6 @@ class PacingController { } }; - // Expected max pacer delay. If ExpectedQueueTime() is higher than - // this value, the packet producers should wait (eg drop frames rather than - // encoding them). Bitrate sent may temporarily exceed target set by - // UpdateBitrate() so that this limit will be upheld. - static const TimeDelta kMaxExpectedQueueLength; // If no media or paused, wake up at least every `kPausedProcessIntervalMs` in // order to send a keep-alive packet so we don't get stuck in a bad state due // to lack of feedback. @@ -93,14 +88,45 @@ class PacingController { // the send burst interval. // Ex: max send burst interval = 63Kb / 10Mbit/s = 50ms. static constexpr DataSize kMaxBurstSize = DataSize::Bytes(63 * 1000); - // The pacer is allowed to send enqued packets in bursts and can build up a - // packet "debt" that correspond to approximately the send rate during - // the burst interval. + + // Configuration default values. static constexpr TimeDelta kDefaultBurstInterval = TimeDelta::Millis(40); + static constexpr TimeDelta kMaxExpectedQueueLength = TimeDelta::Millis(2000); + + struct Configuration { + // If the pacer queue grows longer than the configured max queue limit, + // pacer sends at the minimum rate needed to keep the max queue limit and + // ignore the current bandwidth estimate. + bool drain_large_queues = true; + // Expected max pacer delay. If ExpectedQueueTime() is higher than + // this value, the packet producers should wait (eg drop frames rather than + // encoding them). Bitrate sent may temporarily exceed target set by + // SetPacingRates() so that this limit will be upheld if + // `drain_large_queues` is set. + TimeDelta queue_time_limit = kMaxExpectedQueueLength; + // If the first packet of a keyframe is enqueued on a RTP stream, pacer + // skips forward to that packet and drops other enqueued packets on that + // stream, unless a keyframe is already being paced. + bool keyframe_flushing = false; + // Audio retransmission is prioritized before video retransmission packets. + bool prioritize_audio_retransmission = false; + // Configure separate timeouts per priority. After a timeout, a packet of + // that sort will not be paced and instead dropped. + // Note: to set TTL on audio retransmission, + // `prioritize_audio_retransmission` must be true. + PacketQueueTTL packet_queue_ttl; + // The pacer is allowed to send enqueued packets in bursts and can build up + // a packet "debt" that correspond to approximately the send rate during the + // burst interval. + TimeDelta send_burst_interval = kDefaultBurstInterval; + }; + + static Configuration DefaultConfiguration() { return Configuration{}; } PacingController(Clock* clock, PacketSender* packet_sender, - const FieldTrialsView& field_trials); + const FieldTrialsView& field_trials, + Configuration configuration = DefaultConfiguration()); ~PacingController(); |