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alsa-mixer: Make sure that SND_MIXER_SCHN_UNKNOWN isn't used when indexing e->masks.

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SND_MIXER_SCHN_UNKNOWN is defined as -1, so that's not a good array index...
This commit is contained in:
Tanu Kaskinen 2011-03-23 12:03:43 +02:00 • committed by Colin Guthrie
parent 5270785238
commit 44623a347d
1 changed files with 11 additions and 2 deletions
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13
src/modules/alsa/alsa-mixer.c
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@ -1453,8 +1453,13 @@ static int element_probe(pa_alsa_element *e, snd_mixer_t *m) {
e->n_channels = 1;
if (!e->override_map) {
for (p = PA_CHANNEL_POSITION_FRONT_LEFT; p < PA_CHANNEL_POSITION_MAX; p++)
for (p = PA_CHANNEL_POSITION_FRONT_LEFT; p < PA_CHANNEL_POSITION_MAX; p++) {
if (alsa_channel_ids[p] == SND_MIXER_SCHN_UNKNOWN)
continue;
e->masks[alsa_channel_ids[p]][e->n_channels-1] = 0;
}
e->masks[SND_MIXER_SCHN_MONO][e->n_channels-1] = PA_CHANNEL_POSITION_MASK_ALL;
}
@ -1510,8 +1515,12 @@ static int element_probe(pa_alsa_element *e, snd_mixer_t *m) {
}
e->merged_mask = 0;
for (p = PA_CHANNEL_POSITION_FRONT_LEFT; p < PA_CHANNEL_POSITION_MAX; p++)
for (p = PA_CHANNEL_POSITION_FRONT_LEFT; p < PA_CHANNEL_POSITION_MAX; p++) {
if (alsa_channel_ids[p] == SND_MIXER_SCHN_UNKNOWN)
continue;
e->merged_mask |= e->masks[alsa_channel_ids[p]][e->n_channels-1];
}
}
}
}