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/***
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);
}
}
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