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[alsa-lib] Avoid zero division

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Check the invalid parameters in snd_pcm_sw_params() beforehand to avoid
zero division.
This commit is contained in:
Takashi Iwai 2004-09-17 17:36:18 +00:00
parent 3a8bfd43d7
commit 83a533d1a7
1 changed files with 2 additions and 0 deletions
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2
src/pcm/pcm.c
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@ -819,6 +819,8 @@ int snd_pcm_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t *params)
{ {
int err; int err;
assert(pcm->setup); /* the hw_params must be set at first!!! */ assert(pcm->setup); /* the hw_params must be set at first!!! */
if (! params->avail_min || ! params->xfer_align)
return -EINVAL;
if (params->start_threshold <= pcm->buffer_size && if (params->start_threshold <= pcm->buffer_size &&
params->start_threshold > (pcm->buffer_size / params->avail_min) * params->avail_min) { params->start_threshold > (pcm->buffer_size / params->avail_min) * params->avail_min) {
SNDERR("snd_pcm_sw_params: params->avail_min problem for start_threshold"); SNDERR("snd_pcm_sw_params: params->avail_min problem for start_threshold");