fdo-mirrors/pipewire
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pipewire/pipewire.git synced 2025-12-20 02:10:04 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

spa: alsa: Guard against mismatched LPCM channel count in ELD parsing

Browse source 
With wonky EDID states, we want to make sure we don't overflow the
available positions.
This commit is contained in:
Arun Raghavan 2025-12-15 11:48:14 -08:00
parent d89d1668dc
commit ee42b18226
1 changed files with 18 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
spa/plugins/alsa/acp/acp.c
View file

@ -1137,7 +1137,7 @@ static int hdmi_eld_changed(snd_mixer_elem_t *melem, unsigned int mask)
}
old_position = pa_proplist_gets(p->proplist, ACP_KEY_AUDIO_POSITION_DETECTED);
if (eld.speakers == 0) {
if (eld.speakers == 0 || eld.lpcm_channels == 0) {
changed |= old_position != NULL;
pa_proplist_unset(p->proplist, ACP_KEY_AUDIO_POSITION_DETECTED);
} else {
@ -1146,32 +1146,38 @@ static int hdmi_eld_changed(snd_mixer_elem_t *melem, unsigned int mask)
struct spa_strbuf b;
int i = 0;
#define _ADD_CHANNEL_POSITION(pos) \
{ \
if (i + 1 < eld.lpcm_channels) \
positions[i++] = pos; \
}
if (eld.speakers & 0x01) {
positions[i++] = ACP_CHANNEL_FL;
positions[i++] = ACP_CHANNEL_FR;
_ADD_CHANNEL_POSITION(ACP_CHANNEL_FL);
_ADD_CHANNEL_POSITION(ACP_CHANNEL_FR);
}
if (eld.speakers & 0x02) {
positions[i++] = ACP_CHANNEL_LFE;
_ADD_CHANNEL_POSITION(ACP_CHANNEL_LFE);
}
if (eld.speakers & 0x04) {
positions[i++] = ACP_CHANNEL_FC;
_ADD_CHANNEL_POSITION(ACP_CHANNEL_FC);
}
if (eld.speakers & 0x08) {
positions[i++] = ACP_CHANNEL_RL;
positions[i++] = ACP_CHANNEL_RR;
_ADD_CHANNEL_POSITION(ACP_CHANNEL_RL);
_ADD_CHANNEL_POSITION(ACP_CHANNEL_RR);
}
/* The rest are out of order in order of what channels we would prefer to use/expose first */
if (eld.speakers & 0x40) {
/* Use SL/SR instead of RLC/RRC */
positions[i++] = ACP_CHANNEL_SL;
positions[i++] = ACP_CHANNEL_SR;
_ADD_CHANNEL_POSITION(ACP_CHANNEL_SL);
_ADD_CHANNEL_POSITION(ACP_CHANNEL_SR);
}
if (eld.speakers & 0x20) {
positions[i++] = ACP_CHANNEL_RLC;
positions[i++] = ACP_CHANNEL_RRC;
_ADD_CHANNEL_POSITION(ACP_CHANNEL_RLC);
_ADD_CHANNEL_POSITION(ACP_CHANNEL_RRC);
}
if (eld.speakers & 0x10) {
positions[i++] = ACP_CHANNEL_RC;
_ADD_CHANNEL_POSITION(ACP_CHANNEL_RC);
}
while (i < eld.lpcm_channels)
positions[i++] = ACP_CHANNEL_UNKNOWN;