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Add APIs to pass pa_volume_t fields in a tagstruct

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This commit is contained in:
Lennart Poettering 2008-12-24 00:46:02 +01:00
parent 6342053b34
commit 3e3c103ed9
2 changed files with 42 additions and 2 deletions
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38
src/pulsecore/tagstruct.c
View file

@ -254,6 +254,17 @@ void pa_tagstruct_put_cvolume(pa_tagstruct *t, const pa_cvolume *cvolume) {
}
}
void pa_tagstruct_put_volume(pa_tagstruct *t, pa_volume_t vol) {
uint32_t u;
pa_assert(t);
extend(t, 5);
t->data[t->length] = PA_TAG_VOLUME;
u = htonl((uint32_t) vol);
memcpy(t->data+t->length+1, &u, 4);
t->length += 5;
}
void pa_tagstruct_put_proplist(pa_tagstruct *t, pa_proplist *p) {
void *state = NULL;
pa_assert(t);
@ -555,6 +566,25 @@ int pa_tagstruct_get_cvolume(pa_tagstruct *t, pa_cvolume *cvolume) {
return 0;
}
int pa_tagstruct_get_volume(pa_tagstruct*t, pa_volume_t *vol) {
uint32_t u;
pa_assert(t);
pa_assert(vol);
if (t->rindex+5 > t->length)
return -1;
if (t->data[t->rindex] != PA_TAG_VOLUME)
return -1;
memcpy(&u, t->data+t->rindex+1, 4);
*vol = (pa_volume_t) ntohl(u);
t->rindex += 5;
return 0;
}
int pa_tagstruct_get_proplist(pa_tagstruct *t, pa_proplist *p) {
size_t saved_rindex;
@ -663,6 +693,10 @@ void pa_tagstruct_put(pa_tagstruct *t, ...) {
pa_tagstruct_put_cvolume(t, va_arg(va, pa_cvolume *));
break;
case PA_TAG_VOLUME:
pa_tagstruct_put_volume(t, va_arg(va, pa_volume_t));
break;
case PA_TAG_PROPLIST:
pa_tagstruct_put_proplist(t, va_arg(va, pa_proplist *));
break;
@ -738,6 +772,10 @@ int pa_tagstruct_get(pa_tagstruct *t, ...) {
ret = pa_tagstruct_get_cvolume(t, va_arg(va, pa_cvolume *));
break;
case PA_TAG_VOLUME:
ret = pa_tagstruct_get_volume(t, va_arg(va, pa_volume_t *));
break;
case PA_TAG_PROPLIST:
ret = pa_tagstruct_get_proplist(t, va_arg(va, pa_proplist *));
break;

6
src/pulsecore/tagstruct.h
View file

@ -54,7 +54,8 @@ enum {
PA_TAG_USEC = 'U' /* 64bit unsigned */,
PA_TAG_CHANNEL_MAP = 'm',
PA_TAG_CVOLUME = 'v',
PA_TAG_PROPLIST = 'P'
PA_TAG_PROPLIST = 'P',
PA_TAG_VOLUME = 'V'
};
pa_tagstruct *pa_tagstruct_new(const uint8_t* data, size_t length);
@ -79,6 +80,7 @@ void pa_tagstruct_put_usec(pa_tagstruct*t, pa_usec_t u);
void pa_tagstruct_put_channel_map(pa_tagstruct *t, const pa_channel_map *map);
void pa_tagstruct_put_cvolume(pa_tagstruct *t, const pa_cvolume *cvolume);
void pa_tagstruct_put_proplist(pa_tagstruct *t, pa_proplist *p);
void pa_tagstruct_put_volume(pa_tagstruct *t, pa_volume_t volume);
int pa_tagstruct_get(pa_tagstruct *t, ...);
@ -95,6 +97,6 @@ int pa_tagstruct_get_usec(pa_tagstruct*t, pa_usec_t *u);
int pa_tagstruct_get_channel_map(pa_tagstruct *t, pa_channel_map *map);
int pa_tagstruct_get_cvolume(pa_tagstruct *t, pa_cvolume *v);
int pa_tagstruct_get_proplist(pa_tagstruct *t, pa_proplist *p);
int pa_tagstruct_get_volume(pa_tagstruct *t, pa_volume_t *v);
#endif