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media-session: add callback based sync method

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Call the callback when the sync completes. Implement roundtrip
with this.
This commit is contained in:
Wim Taymans 2019-11-18 13:10:21 +01:00
parent f2ce69c4bd
commit e24e383550
2 changed files with 53 additions and 8 deletions
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58
src/examples/media-session/media-session.c
View file

@ -63,6 +63,13 @@ struct data {
size_t size;
};
struct sync {
struct spa_list link;
int seq;
void (*callback) (void *data);
void *data;
};
struct impl {
struct sm_media_session this;
@ -87,6 +94,7 @@ struct impl {
struct spa_list endpoint_link_list; /** list of struct endpoint_link */
struct pw_map endpoint_links; /** map of endpoint_link */
struct spa_list sync_list; /** list of struct sync */
int rescan_seq;
int last_seq;
};
@ -623,20 +631,46 @@ int sm_media_session_schedule_rescan(struct sm_media_session *sess)
return impl->rescan_seq;
}
int sm_media_session_sync(struct sm_media_session *sess,
void (*callback) (void *data), void *data)
{
struct impl *impl = SPA_CONTAINER_OF(sess, struct impl, this);
struct sync *sync;
sync = calloc(1, sizeof(struct sync));
if (sync == NULL)
return -errno;
spa_list_append(&impl->sync_list, &sync->link);
sync->callback = callback;
sync->data = data;
sync->seq = pw_core_proxy_sync(impl->core_proxy, 0, impl->last_seq);
return sync->seq;
}
static void roundtrip_callback(void *data)
{
int *done = data;
*done = 1;
}
int sm_media_session_roundtrip(struct sm_media_session *sess)
{
struct impl *impl = SPA_CONTAINER_OF(sess, struct impl, this);
struct pw_main_loop *loop = sess->loop;
int seq, res;
int done, res;
if (impl->core_proxy == NULL)
return -EIO;
seq = pw_core_proxy_sync(impl->core_proxy, 0, impl->last_seq);
pw_log_debug(NAME" %p: roundtrip %d", impl, seq);
done = 0;
if ((res = sm_media_session_sync(sess, roundtrip_callback, &done)) < 0)
return res;
pw_log_debug(NAME" %p: roundtrip %d", impl, res);
pw_loop_enter(loop->loop);
while (impl->last_seq <= seq) {
while (!done) {
if ((res = pw_loop_iterate(loop->loop, -1)) < 0) {
pw_log_warn(NAME" %p: iterate error %d (%s)",
loop, res, spa_strerror(res));
@ -644,12 +678,10 @@ int sm_media_session_roundtrip(struct sm_media_session *sess)
}
}
pw_loop_leave(loop->loop);
if (res >= 0)
res = seq;
pw_log_debug(NAME" %p: roundtrip done %d", impl, res);
pw_log_debug(NAME" %p: roundtrip done", impl);
return res;
return 0;
}
static void
@ -955,7 +987,16 @@ static int start_policy(struct impl *impl)
static void core_done(void *data, uint32_t id, int seq)
{
struct impl *impl = data;
struct sync *s, *t;
impl->last_seq = seq;
spa_list_for_each_safe(s, t, &impl->sync_list, link) {
if (s->seq == seq) {
spa_list_remove(&s->link);
s->callback(s->data);
free(s);
}
}
if (impl->rescan_seq == seq) {
pw_log_trace(NAME" %p: rescan %u %d", impl, id, seq);
sm_media_session_emit_rescan(impl, seq);
@ -1070,6 +1111,7 @@ int main(int argc, char *argv[])
pw_map_init(&impl.globals, 64, 64);
pw_map_init(&impl.endpoint_links, 64, 64);
spa_list_init(&impl.endpoint_link_list);
spa_list_init(&impl.sync_list);
spa_hook_list_init(&impl.hooks);
if ((res = pw_remote_connect(impl.monitor_remote)) < 0)

3
src/examples/media-session/media-session.h
View file

@ -164,6 +164,9 @@ int sm_media_session_add_listener(struct sm_media_session *sess, struct spa_hook
int sm_media_session_roundtrip(struct sm_media_session *sess);
int sm_media_session_sync(struct sm_media_session *sess,
void (*callback) (void *data), void *data);
struct sm_object *sm_media_session_find_object(struct sm_media_session *sess, uint32_t id);
int sm_media_session_schedule_rescan(struct sm_media_session *sess);