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alsa-mixer: Make probing elements with more than two volume channels fail.

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This is just a quick hack to prevent array overflow. Correct fix would be to
implement support for more channels.
This commit is contained in:
Tanu Kaskinen 2011-03-23 14:52:48 +02:00 • committed by Colin Guthrie
parent 9501504859
commit 5270785238
1 changed files with 16 additions and 0 deletions
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16
src/modules/alsa/alsa-mixer.c
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@ -1477,6 +1477,22 @@ static int element_probe(pa_alsa_element *e, snd_mixer_t *m) {
return -1;
}
if (e->n_channels > 2) {
/* FIXME: In some places code like this is used:
*
* e->masks[alsa_channel_ids[p]][e->n_channels-1]
*
* The definition of e->masks is
*
* pa_channel_position_mask_t masks[SND_MIXER_SCHN_LAST][2];
*
* Since the array size is fixed at 2, we obviously
* don't support elements with more than two
* channels... */
pa_log_warn("Volume element %s has %u channels. That's too much! I can't handle that!", e->alsa_name, e->n_channels);
return -1;
}
if (!e->override_map) {
for (p = PA_CHANNEL_POSITION_FRONT_LEFT; p < PA_CHANNEL_POSITION_MAX; p++) {
pa_bool_t has_channel;