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pulse: clamp channel numbers to right values

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When converting between pipewire and pulse channelmaps, make sure we
clamp the channel numbers to the the right limit.
This commit is contained in:
Wim Taymans 2025-04-04 15:13:47 +02:00
parent 722776cf65
commit a9f12537d1
4 changed files with 20 additions and 18 deletions
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17
src/modules/module-protocol-pulse/format.c
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@ -348,14 +348,15 @@ uint32_t channel_paname2id(const char *name, size_t size)
void channel_map_to_positions(const struct channel_map *map, uint32_t *pos)
{
int i;
for (i = 0; i < map->channels; i++)
uint32_t i, channels = SPA_MIN(map->channels, SPA_AUDIO_MAX_CHANNELS);
for (i = 0; i < channels; i++)
pos[i] = map->map[i];
}
void positions_to_channel_map(const uint32_t *pos, uint32_t channels, struct channel_map *map)
{
uint32_t i;
channels = SPA_MIN(channels, CHANNELS_MAX);
for (i = 0; i < channels; i++)
map->map[i] = pos[i];
map->channels = channels;
@ -430,7 +431,7 @@ void channel_map_parse(const char *str, struct channel_map *map)
};
} else {
channels = map->channels = 0;
while (*p && channels < SPA_AUDIO_MAX_CHANNELS) {
while (*p && channels < CHANNELS_MAX) {
uint32_t chname;
if ((len = strcspn(p, ",")) == 0)
@ -576,11 +577,11 @@ int format_parse_param(const struct spa_pod *param, bool collect,
if (info.info.raw.rate)
ss->rate = info.info.raw.rate;
if (info.info.raw.channels)
ss->channels = info.info.raw.channels;
ss->channels = SPA_MIN(info.info.raw.channels, CHANNELS_MAX);
}
if (map) {
if (info.info.raw.channels) {
map->channels = info.info.raw.channels;
map->channels = SPA_MIN(info.info.raw.channels, CHANNELS_MAX);
for (i = 0; i < map->channels; i++)
map->map[i] = info.info.raw.position[i];
}
@ -654,13 +655,13 @@ int format_info_from_spec(struct format_info *info, const struct sample_spec *ss
pw_properties_setf(info->props, "format.channels", "%d", ss->channels);
if (map && map->channels == ss->channels) {
char chmap[1024] = "";
int i, o, r;
uint32_t aux = 0;
int r;
uint32_t aux = 0, i, o;
for (i = 0, o = 0; i < map->channels; i++) {
r = snprintf(chmap+o, sizeof(chmap)-o, "%s%s", i == 0 ? "" : ",",
channel_id2paname(map->map[i], &aux));
if (r < 0 || o + r >= (int)sizeof(chmap))
if (r < 0 || o + r >= sizeof(chmap))
return -ENOSPC;
o += r;
}