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/* PipeWire
*
* Copyright © 2021 Wim Taymans
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <pipewire/pipewire.h>
#include "avahi-poll.h"
struct impl {
AvahiPoll api;
struct pw_loop *loop;
};
struct AvahiWatch {
struct impl *impl;
struct spa_source *source;
AvahiWatchEvent events;
AvahiWatchCallback callback;
void *userdata;
unsigned int dispatching;
};
struct AvahiTimeout {
struct impl *impl;
struct spa_source *source;
AvahiTimeoutCallback callback;
void *userdata;
};
static AvahiWatchEvent from_pw_events(uint32_t mask)
{
return (mask & SPA_IO_IN ? AVAHI_WATCH_IN : 0) |
(mask & SPA_IO_OUT ? AVAHI_WATCH_OUT : 0) |
(mask & SPA_IO_ERR ? AVAHI_WATCH_ERR : 0) |
(mask & SPA_IO_HUP ? AVAHI_WATCH_HUP : 0);
}
static uint32_t to_pw_events(AvahiWatchEvent e) {
return (e & AVAHI_WATCH_IN ? SPA_IO_IN : 0) |
(e & AVAHI_WATCH_OUT ? SPA_IO_OUT : 0) |
(e & AVAHI_WATCH_ERR ? SPA_IO_ERR : 0) |
(e & AVAHI_WATCH_HUP ? SPA_IO_HUP : 0);
}
static void watch_callback(void *data, int fd, uint32_t mask)
{
AvahiWatch *w = data;
w->dispatching += 1;
w->events = from_pw_events(mask);
w->callback(w, fd, w->events, w->userdata);
w->events = 0;
if (--w->dispatching == 0 && !w->source)
free(w);
}
static AvahiWatch* watch_new(const AvahiPoll *api, int fd, AvahiWatchEvent event,
AvahiWatchCallback callback, void *userdata)
{
struct impl *impl = api->userdata;
AvahiWatch *w;
w = calloc(1, sizeof(*w));
if (w == NULL)
return NULL;
w->impl = impl;
w->events = 0;
w->callback = callback;
w->userdata = userdata;
w->source = pw_loop_add_io(impl->loop, fd, to_pw_events(event),
false, watch_callback, w);
return w;
}
static void watch_update(AvahiWatch *w, AvahiWatchEvent event)
{
struct impl *impl = w->impl;
pw_loop_update_io(impl->loop, w->source, to_pw_events(event));
}
static AvahiWatchEvent watch_get_events(AvahiWatch *w)
{
return w->events;
}
static void watch_free(AvahiWatch *w)
{
pw_loop_destroy_source(w->impl->loop, w->source);
w->source = NULL;
if (!w->dispatching)
free(w);
}
static void timeout_callback(void *data, uint64_t expirations)
{
AvahiTimeout *w = data;
w->callback(w, w->userdata);
}
static AvahiTimeout* timeout_new(const AvahiPoll *api, const struct timeval *tv,
AvahiTimeoutCallback callback, void *userdata)
{
struct impl *impl = api->userdata;
struct timespec value;
AvahiTimeout *w;
w = calloc(1, sizeof(*w));
if (w == NULL)
return NULL;
w->impl = impl;
w->callback = callback;
w->userdata = userdata;
w->source = pw_loop_add_timer(impl->loop, timeout_callback, w);
if (tv != NULL) {
value.tv_sec = tv->tv_sec;
value.tv_nsec = tv->tv_usec * 1000UL;
pw_loop_update_timer(impl->loop, w->source, &value, NULL, true);
}
return w;
}
static void timeout_update(AvahiTimeout *t, const struct timeval *tv)
{
struct impl *impl = t->impl;
struct timespec value, *v = NULL;
if (tv != NULL) {
value.tv_sec = tv->tv_sec;
value.tv_nsec = tv->tv_usec * 1000UL;
if (value.tv_sec == 0 && value.tv_nsec == 0)
value.tv_nsec = 1;
v = &value;
}
pw_loop_update_timer(impl->loop, t->source, v, NULL, true);
}
static void timeout_free(AvahiTimeout *t)
{
struct impl *impl = t->impl;
pw_loop_destroy_source(impl->loop, t->source);
free(t);
}
static const AvahiPoll avahi_poll_api = {
.watch_new = watch_new,
.watch_update = watch_update,
.watch_get_events = watch_get_events,
.watch_free = watch_free,
.timeout_new = timeout_new,
.timeout_update = timeout_update,
.timeout_free = timeout_free,
};
AvahiPoll* pw_avahi_poll_new(struct pw_loop *loop)
{
struct impl *impl;
impl = calloc(1, sizeof(*impl));
if (impl == NULL)
return NULL;
impl->loop = loop;
impl->api = avahi_poll_api;
impl->api.userdata = impl;
return &impl->api;
}
void pw_avahi_poll_free(AvahiPoll *p)
{
struct impl *impl = SPA_CONTAINER_OF(p, struct impl, api);
free(impl);
}
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