From 3e3c103ed9e9e4782c12380c3735ab9aaf2611c8 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 24 Dec 2008 00:46:02 +0100
Subject: Add APIs to pass pa_volume_t fields in a tagstruct

---
 src/pulsecore/tagstruct.c | 38 ++++++++++++++++++++++++++++++++++++++
 src/pulsecore/tagstruct.h |  6 ++++--
 2 files changed, 42 insertions(+), 2 deletions(-)

(limited to 'src/pulsecore')

diff --git a/src/pulsecore/tagstruct.c b/src/pulsecore/tagstruct.c
index 62a30144..330b7596 100644
--- a/src/pulsecore/tagstruct.c
+++ b/src/pulsecore/tagstruct.c
@@ -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;
diff --git a/src/pulsecore/tagstruct.h b/src/pulsecore/tagstruct.h
index e7d07054..19288eeb 100644
--- a/src/pulsecore/tagstruct.h
+++ b/src/pulsecore/tagstruct.h
@@ -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
-- 
cgit