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pulse-server: improve channel_map parsing

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Add some more common channel name shortcuts supported by pulseaudio.
Make sure we match the full channel-name, not just the prefix.
Generate an invalid channel map when an invalid channel name was
given instead of a partial channel map.
This commit is contained in:
Wim Taymans 2023-03-01 13:42:58 +01:00
parent 8a24f58cd1
commit ab94a71e3c
1 changed files with 22 additions and 4 deletions
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26
src/modules/module-protocol-pulse/format.c
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@ -316,10 +316,21 @@ const char *channel_id2paname(uint32_t id, uint32_t *aux)
return audio_channels[CHANNEL_POSITION_AUX0 + ((*aux)++ & 31)].name; return audio_channels[CHANNEL_POSITION_AUX0 + ((*aux)++ & 31)].name;
} }
#define spa_streqn(a,s,b) (strlen(b) == (s) && strncmp((a),(b),(s)) == 0)
uint32_t channel_paname2id(const char *name, size_t size) uint32_t channel_paname2id(const char *name, size_t size)
{ {
if (spa_streqn(name, size, "left"))
return SPA_AUDIO_CHANNEL_FL;
else if (spa_streqn(name, size, "right"))
return SPA_AUDIO_CHANNEL_FR;
else if (spa_streqn(name, size, "center"))
return SPA_AUDIO_CHANNEL_FC;
else if (spa_streqn(name, size, "subwoofer"))
return SPA_AUDIO_CHANNEL_LFE;
SPA_FOR_EACH_ELEMENT_VAR(audio_channels, i) { SPA_FOR_EACH_ELEMENT_VAR(audio_channels, i) {
if (strncmp(name, i->name, size) == 0) if (spa_streqn(name, size, i->name))
return i->channel; return i->channel;
} }
return SPA_AUDIO_CHANNEL_UNKNOWN; return SPA_AUDIO_CHANNEL_UNKNOWN;
@ -337,6 +348,7 @@ void channel_map_parse(const char *str, struct channel_map *map)
{ {
const char *p = str; const char *p = str;
size_t len; size_t len;
uint32_t channels = 0;
if (spa_streq(p, "stereo")) { if (spa_streq(p, "stereo")) {
*map = (struct channel_map) { *map = (struct channel_map) {
@ -400,13 +412,19 @@ void channel_map_parse(const char *str, struct channel_map *map)
.map[7] = SPA_AUDIO_CHANNEL_SR, .map[7] = SPA_AUDIO_CHANNEL_SR,
}; };
} else { } else {
map->channels = 0; channels = map->channels = 0;
while (*p && map->channels < SPA_AUDIO_MAX_CHANNELS) { while (*p && channels < SPA_AUDIO_MAX_CHANNELS) {
uint32_t chname;
if ((len = strcspn(p, ",")) == 0) if ((len = strcspn(p, ",")) == 0)
break; break;
map->map[map->channels++] = channel_paname2id(p, len); chname = channel_paname2id(p, len);
if (chname == SPA_AUDIO_CHANNEL_UNKNOWN)
return;
map->map[channels++] = chname;
p += len + strspn(p+len, ","); p += len + strspn(p+len, ",");
} }
map->channels = channels;
} }
} }