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[client] audio: limit timing graph update rate

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Sample the playback ring graph at its original 40 Hz rate so its
1,200 entries continue to represent 30 seconds of history.

Keep packet processing and asynchronous USB feedback at full rate.
This commit is contained in:
Geoffrey McRae
2026-08-10 04:49:34 +10:00
parent 0f3c1db261
commit 2ca2553086
1 changed files with 5 additions and 1 deletions
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6
client/src/audio.c
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@@ -66,6 +66,7 @@
#define PLAYBACK_DEVICE_RATE_STABLE_DELTA_PPM 50.0 #define PLAYBACK_DEVICE_RATE_STABLE_DELTA_PPM 50.0
#define PLAYBACK_DEVICE_RATE_MAX_ACQUIRE_SEC 20.0 #define PLAYBACK_DEVICE_RATE_MAX_ACQUIRE_SEC 20.0
#define PLAYBACK_FEEDBACK_INTERVAL_NS INT64_C(1000000) #define PLAYBACK_FEEDBACK_INTERVAL_NS INT64_C(1000000)
#define PLAYBACK_GRAPH_INTERVAL_NS INT64_C(25000000)
typedef enum typedef enum
{ {
@@ -173,6 +174,7 @@ typedef struct
double lastRatio; double lastRatio;
double lastClockRatio; double lastClockRatio;
int64_t nextFeedbackTime; int64_t nextFeedbackTime;
int64_t nextGraphTime;
int64_t nextLogTime; int64_t nextLogTime;
unsigned int bufferOverruns; unsigned int bufferOverruns;
@@ -1137,6 +1139,7 @@ static void playbackStart(const LG_AudioFormat * format,
audio.playback.sourceData.lastRatio = 1.0; audio.playback.sourceData.lastRatio = 1.0;
audio.playback.sourceData.lastClockRatio = 1.0; audio.playback.sourceData.lastClockRatio = 1.0;
audio.playback.sourceData.nextFeedbackTime = 0; audio.playback.sourceData.nextFeedbackTime = 0;
audio.playback.sourceData.nextGraphTime = 0;
audio.playback.sourceData.bufferOverrunPending = false; audio.playback.sourceData.bufferOverrunPending = false;
audio.playback.sourceData.bufferOverruns = 0; audio.playback.sourceData.bufferOverruns = 0;
audio.playback.sourceData.nextLogTime = audio.playback.sourceData.nextLogTime =
@@ -2018,8 +2021,9 @@ static void playbackData(const void * data, size_t frameCount,
const double softwareLatencyMs = const double softwareLatencyMs =
actualLatencyFrames * 1000.0 / audio.playback.sampleRate; actualLatencyFrames * 1000.0 / audio.playback.sampleRate;
if (audio.playback.graph) if (audio.playback.graph && now >= sourceData->nextGraphTime)
{ {
sourceData->nextGraphTime = now + PLAYBACK_GRAPH_INTERVAL_NS;
const float latency = softwareLatencyMs; const float latency = softwareLatencyMs;
ringbuffer_push(audio.playback.timings, &latency); ringbuffer_push(audio.playback.timings, &latency);
app_invalidateGraph(audio.playback.graph); app_invalidateGraph(audio.playback.graph);