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alsa: add option to disable mmap access mode

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This commit is contained in:
Wim Taymans 2021-01-15 15:44:22 +01:00
parent 2ff4615e53
commit 482f96a644
5 changed files with 17 additions and 8 deletions
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19
spa/plugins/alsa/alsa-pcm.c
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@ -516,11 +516,17 @@ int spa_alsa_set_format(struct state *state, struct spa_audio_info *fmt, uint32_
snd_pcm_access_mask_alloca(&amask);
snd_pcm_hw_params_get_access_mask(params, amask);
if ((err = snd_pcm_hw_params_set_access(hndl, params,
planar ? SND_PCM_ACCESS_MMAP_NONINTERLEAVED
: SND_PCM_ACCESS_MMAP_INTERLEAVED)) < 0) {
spa_log_debug(state->log, NAME" %p: MMAP not possible: %s", state,
snd_strerror(err));
state->use_mmap = !state->disable_mmap;
if (state->use_mmap) {
if ((err = snd_pcm_hw_params_set_access(hndl, params,
planar ? SND_PCM_ACCESS_MMAP_NONINTERLEAVED
: SND_PCM_ACCESS_MMAP_INTERLEAVED)) < 0) {
spa_log_debug(state->log, NAME" %p: MMAP not possible: %s", state,
snd_strerror(err));
state->use_mmap = false;
}
}
if (!state->use_mmap) {
if ((err = snd_pcm_hw_params_set_access(hndl, params,
planar ? SND_PCM_ACCESS_RW_NONINTERLEAVED
: SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
@ -528,9 +534,6 @@ int spa_alsa_set_format(struct state *state, struct spa_audio_info *fmt, uint32_
snd_strerror(err));
return err;
}
state->use_mmap = false;
} else {
state->use_mmap = true;
}
/* disable ALSA wakeups, we use a timer */