1 files changed, 122 insertions, 0 deletions
diff --git a/src/pulsecore/packet.c b/src/pulsecore/packet.c
new file mode 100644
index 0000000..2a61d58
--- /dev/null
+++ b/src/pulsecore/packet.c
@@ -0,0 +1,122 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2.1 of the
+  License, or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+
+#include <pulse/xmalloc.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/refcnt.h>
+#include <pulsecore/flist.h>
+
+#include "packet.h"
+
+#define MAX_APPENDED_SIZE 128
+
+struct pa_packet {
+    PA_REFCNT_DECLARE;
+    enum { PA_PACKET_APPENDED, PA_PACKET_DYNAMIC } type;
+    size_t length;
+    uint8_t *data;
+    union {
+        uint8_t appended[MAX_APPENDED_SIZE];
+    } per_type;
+};
+
+PA_STATIC_FLIST_DECLARE(packets, 0, pa_xfree);
+
+pa_packet* pa_packet_new(size_t length) {
+    pa_packet *p;
+
+    pa_assert(length > 0);
+
+    if (!(p = pa_flist_pop(PA_STATIC_FLIST_GET(packets))))
+        p = pa_xnew(pa_packet, 1);
+    PA_REFCNT_INIT(p);
+    p->length = length;
+    if (length > MAX_APPENDED_SIZE) {
+        p->data = pa_xmalloc(length);
+        p->type = PA_PACKET_DYNAMIC;
+    } else {
+        p->data = p->per_type.appended;
+        p->type = PA_PACKET_APPENDED;
+    }
+
+    return p;
+}
+
+pa_packet* pa_packet_new_data(const void* data, size_t length) {
+    pa_packet *p = pa_packet_new(length);
+
+    pa_assert(data);
+    pa_assert(length > 0);
+
+    memcpy(p->data, data, length);
+
+    return p;
+}
+
+pa_packet* pa_packet_new_dynamic(void* data, size_t length) {
+    pa_packet *p;
+
+    pa_assert(data);
+    pa_assert(length > 0);
+
+    if (!(p = pa_flist_pop(PA_STATIC_FLIST_GET(packets))))
+        p = pa_xnew(pa_packet, 1);
+    PA_REFCNT_INIT(p);
+    p->length = length;
+    p->data = data;
+    p->type = PA_PACKET_DYNAMIC;
+
+    return p;
+}
+
+const void* pa_packet_data(pa_packet *p, size_t *l) {
+    pa_assert(PA_REFCNT_VALUE(p) >= 1);
+    pa_assert(p->data);
+    pa_assert(l);
+
+    *l = p->length;
+
+    return p->data;
+}
+
+pa_packet* pa_packet_ref(pa_packet *p) {
+    pa_assert(p);
+    pa_assert(PA_REFCNT_VALUE(p) >= 1);
+
+    PA_REFCNT_INC(p);
+    return p;
+}
+
+void pa_packet_unref(pa_packet *p) {
+    pa_assert(p);
+    pa_assert(PA_REFCNT_VALUE(p) >= 1);
+
+    if (PA_REFCNT_DEC(p) <= 0) {
+        if (p->type == PA_PACKET_DYNAMIC)
+            pa_xfree(p->data);
+        if (pa_flist_push(PA_STATIC_FLIST_GET(packets), p) < 0)
+            pa_xfree(p);
+    }
+}