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[idd] audio: discipline playback clock from client

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Forward coalesced feedback through the broker to the render clock.

Keep capture independent and apply the rate to WaveRT timing.

Bound and slew targets, then restore unity when feedback stalls.

Withdraw feedback after the watchdog makes fallback safe.
This commit is contained in:
Geoffrey McRae
2026-09-05 06:32:14 +10:00
parent f7b1133785
commit 5681dcdbe7
10 changed files with 679 additions and 60 deletions
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61
idd/LGAudio/Adapter.cpp
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@@ -132,7 +132,9 @@ CAudioAdapter::~CAudioAdapter()
NTSTATUS CAudioAdapter::Initialize()
{
NTSTATUS status = m_clock.Initialize();
NTSTATUS status = m_renderClock.Initialize();
if (NT_SUCCESS(status))
status = m_captureClock.Initialize();
if (NT_SUCCESS(status))
status = m_renderRing.Init();
if (NT_SUCCESS(status))
@@ -149,6 +151,8 @@ NTSTATUS CAudioAdapter::ConfigureStream(
m_renderRing : m_captureRing;
KIRQL transportIrql;
KeAcquireSpinLock(&m_transportLock, &transportIrql);
if (kind == EndpointKind::Render)
m_renderClock.ResetRate();
const NTSTATUS status = ring.Configure(format);
if (!NT_SUCCESS(status))
{
@@ -194,7 +198,10 @@ void CAudioAdapter::SetStreamState(
if (reset)
{
if (kind == EndpointKind::Render)
{
m_renderClock.ResetRate();
m_renderRing.Reset();
}
else
m_captureRing.Reset();
}
@@ -232,6 +239,7 @@ void CAudioAdapter::SetBrokerActive(_In_ bool active)
m_captureRing.Reset();
m_renderRing.Reset();
m_renderClock.ResetRate();
InterlockedExchange(&m_renderDiscontinuity, active ? 1 : 0);
KeReleaseSpinLock(&m_transportLock, oldIrql);
}
@@ -396,9 +404,56 @@ NTSTATUS CAudioAdapter::WriteCaptureFrames(
}
_IRQL_requires_max_(DISPATCH_LEVEL)
AudioClockSnapshot CAudioAdapter::GetClockSnapshot() const
NTSTATUS CAudioAdapter::SetRenderClockRate(
_In_ ULONGLONG streamGeneration,
_In_ ULONGLONG targetRateQ32)
{
return m_clock.GetSnapshot();
NTSTATUS status = STATUS_SUCCESS;
KIRQL transportIrql;
KeAcquireSpinLock(&m_transportLock, &transportIrql);
KIRQL stateIrql;
KeAcquireSpinLock(&m_streamStateLock, &stateIrql);
const AudioStreamSnapshot render = m_renderState;
const bool active =
InterlockedCompareExchange(&m_brokerActive, 0, 0) != 0;
KeReleaseSpinLock(&m_streamStateLock, stateIrql);
if (!active || render.state != KSSTATE_RUN || !render.formatValid)
status = STATUS_DEVICE_NOT_READY;
else if (render.generation != streamGeneration)
status = STATUS_RETRY;
else
{
const ULONGLONG nominalRateQ32 =
static_cast<ULONGLONG>(render.format.sampleRate) << 32;
const ULONGLONG maximumDelta = nominalRateQ32 *
kAudioClockMaximumCorrectionPpm / 1000000;
if (!render.format.sampleRate ||
targetRateQ32 < nominalRateQ32 - maximumDelta ||
targetRateQ32 > nominalRateQ32 + maximumDelta)
{
status = STATUS_INVALID_PARAMETER;
}
else
{
const ULONGLONG rateQ32 =
(targetRateQ32 + render.format.sampleRate / 2) /
render.format.sampleRate;
if (!m_renderClock.SetRate(rateQ32))
status = STATUS_INVALID_PARAMETER;
}
}
KeReleaseSpinLock(&m_transportLock, transportIrql);
return status;
}
_IRQL_requires_max_(DISPATCH_LEVEL)
AudioClockSnapshot CAudioAdapter::GetClockSnapshot(_In_ EndpointKind kind)
{
return kind == EndpointKind::Render ?
m_renderClock.GetSnapshot() : m_captureClock.GetSnapshot();
}
NTSTATUS CAudioAdapter::QueryInterface(