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channelmap: implement pa_channel_position_from_string()

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This commit is contained in:
Lennart Poettering 2009-06-17 03:05:30 +02:00
parent 64b0f38b67
commit d9939690ed
3 changed files with 30 additions and 22 deletions
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1
src/map-file
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@ -28,6 +28,7 @@ pa_channel_map_superset;
pa_channel_map_to_name;
pa_channel_map_to_pretty_name;
pa_channel_map_valid;
pa_channel_position_from_string;
pa_channel_position_to_pretty_string;
pa_channel_position_to_string;
pa_context_add_autoload;

48
src/pulse/channelmap.c
View file

@ -491,6 +491,27 @@ char* pa_channel_map_snprint(char *s, size_t l, const pa_channel_map *map) {
return s;
}
pa_channel_position_t pa_channel_position_from_string(const char *p) {
pa_channel_position_t i;
pa_assert(p);
/* Some special aliases */
if (pa_streq(p, "left"))
return PA_CHANNEL_POSITION_LEFT;
else if (pa_streq(p, "right"))
return PA_CHANNEL_POSITION_RIGHT;
else if (pa_streq(p, "center"))
return PA_CHANNEL_POSITION_CENTER;
else if (pa_streq(p, "subwoofer"))
return PA_CHANNEL_POSITION_SUBWOOFER;
for (i = 0; i < PA_CHANNEL_POSITION_MAX; i++)
if (pa_streq(p, table[i]))
return i;
return PA_CHANNEL_POSITION_INVALID;
}
pa_channel_map *pa_channel_map_parse(pa_channel_map *rmap, const char *s) {
const char *state;
pa_channel_map map;
@ -559,36 +580,19 @@ pa_channel_map *pa_channel_map_parse(pa_channel_map *rmap, const char *s) {
map.channels = 0;
while ((p = pa_split(s, ",", &state))) {
pa_channel_position_t f;
if (map.channels >= PA_CHANNELS_MAX) {
pa_xfree(p);
return NULL;
}
/* Some special aliases */
if (pa_streq(p, "left"))
map.map[map.channels++] = PA_CHANNEL_POSITION_LEFT;
else if (pa_streq(p, "right"))
map.map[map.channels++] = PA_CHANNEL_POSITION_RIGHT;
else if (pa_streq(p, "center"))
map.map[map.channels++] = PA_CHANNEL_POSITION_CENTER;
else if (pa_streq(p, "subwoofer"))
map.map[map.channels++] = PA_CHANNEL_POSITION_SUBWOOFER;
else {
pa_channel_position_t i;
for (i = 0; i < PA_CHANNEL_POSITION_MAX; i++)
if (strcmp(p, table[i]) == 0) {
map.map[map.channels++] = i;
break;
}
if (i >= PA_CHANNEL_POSITION_MAX) {
pa_xfree(p);
return NULL;
}
if ((f = pa_channel_position_from_string(p)) == PA_CHANNEL_POSITION_INVALID) {
pa_xfree(p);
return NULL;
}
map.map[map.channels++] = f;
pa_xfree(p);
}

3
src/pulse/channelmap.h
View file

@ -282,6 +282,9 @@ pa_channel_map* pa_channel_map_init_extend(pa_channel_map *m, unsigned channels,
/** Return a text label for the specified channel position */
const char* pa_channel_position_to_string(pa_channel_position_t pos) PA_GCC_PURE;
/* The inverse of pa_channel_position_to_string(). \since 0.9.16 */
pa_channel_position_t pa_channel_position_from_string(const char *s) PA_GCC_PURE;
/** Return a human readable text label for the specified channel position. \since 0.9.7 */
const char* pa_channel_position_to_pretty_string(pa_channel_position_t pos);