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alsa: avoid rounding down period_size

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Only try to round down the period_size to the lowest power of 2 when we
are resampling and scaling the period_size to match.

In all other cases, we should honour the requested quantum duration.

Fixes #5302
This commit is contained in:
Wim Taymans 2026-06-04 16:54:37 +02:00
parent cecdbc034f
commit d05905f871
1 changed files with 9 additions and 3 deletions
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12
spa/plugins/alsa/alsa-pcm.c
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@ -2441,9 +2441,15 @@ int spa_alsa_set_format(struct state *state, struct spa_audio_info *fmt, uint32_
/* no period size specified. If we are batch or forcing our quantum, /* no period size specified. If we are batch or forcing our quantum,
* use the graph requested quantum scaled by our rate */ * use the graph requested quantum scaled by our rate */
if (period_size == 0 && (state->is_batch || state->force_quantum) && state->position) { if (period_size == 0 && (state->is_batch || state->force_quantum) && state->position) {
period_size = SPA_SCALE32_UP(state->position->clock.target_duration, period_size = state->position->clock.target_duration;
state->rate, state->position->clock.target_rate.denom); /* only if we are rate adjusting, scale the period size and round down
period_size = flp2(period_size); * to a power of two. */
if (state->position->clock.target_rate.denom != 0 &&
state->rate != (int)state->position->clock.target_rate.denom) {
period_size = SPA_SCALE32_UP(period_size,
state->rate, state->position->clock.target_rate.denom);
period_size = flp2(period_size);
}
} }
if (period_size == 0) if (period_size == 0)
period_size = default_period; period_size = default_period;