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alsa: don't fail if 3 periods_min fails

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Some drivers (emu10k1) appear to not necessarily support more than 2
periods.

Don't fail start if snd_pcm_hw_params_set_periods_min() fails, then we
just set nearest possible periods and buffer sizes.
This commit is contained in:
Pauli Virtanen 2025-09-22 20:27:19 +03:00 • committed by Wim Taymans
parent f0a5f09420
commit 2e2f7c9f79
1 changed files with 8 additions and 4 deletions
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12
spa/plugins/alsa/alsa-pcm.c
View file

@ -2360,10 +2360,14 @@ int spa_alsa_set_format(struct state *state, struct spa_audio_info *fmt, uint32_
snd_pcm_uframes_t period_size_max;
unsigned int periods_min = (periods == UINT_MAX) ? 3 : periods;
CHECK(snd_pcm_hw_params_set_periods_min(hndl, params, &periods_min, &dir), "set_periods_min");
CHECK(snd_pcm_hw_params_get_period_size_max(params, &period_size_max, &dir), "get_period_size_max");
if (period_size > period_size_max)
period_size = SPA_MIN(period_size, flp2(period_size_max));
err = snd_pcm_hw_params_set_periods_min(hndl, params, &periods_min, &dir);
if (!err) {
CHECK(snd_pcm_hw_params_get_period_size_max(params, &period_size_max, &dir), "get_period_size_max");
if (period_size > period_size_max)
period_size = SPA_MIN(period_size, flp2(period_size_max));
} else {
spa_log_debug(state->log, "set_periods_min: %s", snd_strerror(err));
}
}
CHECK(snd_pcm_hw_params_set_period_size_near(hndl, params, &period_size, &dir), "set_period_size_near");