// *** main
int main() {
//makeing a follower
ShmdataLogger logger = shmdata_make_logger(&mylog,
&mylog,
&mylog,
&mylog,
&mylog,
&mylog,
NULL);
assert(NULL != logger);
ShmdataFollower follower = shmdata_make_follower("/tmp/check-shmdatasink",
&on_data,
&on_server_connect,
&on_server_disconnect,
NULL,
logger);
assert(NULL != follower);
//gstreamer shmdatasink for writing
GstElement *pipeline, *audiosource, *shmdatasink;
GstBus *bus;
guint bus_watch_id;
gst_init(NULL, NULL);
#ifdef HAVE_CONFIG_H
GstRegistry *registry = gst_registry_get();
gst_registry_scan_path(registry, "./" LT_OBJDIR);
#else
g_printerr("shmdatasink plugin not found");
return -1;
#endif
loop = g_main_loop_new(NULL, FALSE);
/* Create gstreamer elements */
pipeline = gst_pipeline_new("audio-player");
audiosource = gst_element_factory_make("audiotestsrc", "audiosource");
shmdatasink = gst_element_factory_make("shmdatasink", "shmdata-output");
if (!pipeline || !audiosource || !shmdatasink) {
g_printerr("One element could not be created. Exiting.\n"); return -1; }
g_object_set(G_OBJECT(shmdatasink), "socket-path", "/tmp/check-shmdatasink", NULL);
bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));
bus_watch_id = gst_bus_add_watch(bus, bus_call, loop);
gst_object_unref(bus);
gst_bin_add_many(GST_BIN(pipeline), audiosource, shmdatasink, NULL);
gst_element_link(audiosource, shmdatasink);
gst_element_set_state(pipeline, GST_STATE_PLAYING);
g_main_loop_run(loop);
// cleaning gst
gst_element_set_state(pipeline, GST_STATE_NULL);
gst_object_unref(GST_OBJECT(pipeline));
g_source_remove(bus_watch_id);
g_main_loop_unref(loop);
// cleaning follower
shmdata_delete_follower(follower);
shmdata_delete_logger(logger);
return res;
}
static gboolean gst_shmdata_sink_on_caps (GstBaseSink *sink, GstCaps *caps){
GstShmdataSink *self = GST_SHMDATA_SINK (sink);
if (NULL == self->socket_path) {
GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
("Could not make writer with no path."), (NULL));
return FALSE;
}
GST_DEBUG_OBJECT (self, "Creating new socket at %s"
" with shared memory of %lu bytes", self->socket_path, self->size);
g_free(self->caps);
self->caps = gst_caps_to_string (caps);
g_object_notify(G_OBJECT(sink), "caps");
GST_DEBUG_OBJECT(G_OBJECT(sink), "on_caps %s", self->caps);
self->shmlogger = shmdata_make_logger(&gst_shmdata_on_error,
&gst_shmdata_on_critical,
&gst_shmdata_on_warning,
&gst_shmdata_on_message,
&gst_shmdata_on_info,
&gst_shmdata_on_debug,
self);
self->shmwriter = shmdata_make_writer(self->socket_path,
self->size,
NULL == self->caps ? "unknown" : self->caps,
&gst_shmdata_sink_on_client_connected,
&gst_shmdata_sink_on_client_disconnected,
self,
self->shmlogger);
if (NULL == self->shmwriter) {
GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
("Could not make shmdata writer."), (NULL));
return FALSE;
}
self->access = shmdata_get_one_write_access(self->shmwriter);
GST_DEBUG ("Created shmdata writer at %s", self->socket_path);
self->allocator = gst_shmdata_sink_allocator_new (self);
return TRUE;
}
static gboolean
gst_shmdata_src_start_reading (GstShmdataSrc * self)
{
if (!self->socket_path) {
GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND,
("No path specified for socket."), (NULL));
return FALSE;
}
GST_DEBUG_OBJECT (self, "Opening socket %s", self->socket_path);
GST_OBJECT_LOCK (self);
self->is_first_read = TRUE;
self->shmlogger = shmdata_make_logger(&gst_shmdata_on_error,
&gst_shmdata_on_critical,
&gst_shmdata_on_warning,
&gst_shmdata_on_message,
&gst_shmdata_on_info,
&gst_shmdata_on_debug,
self);
self->shmfollower = shmdata_make_follower(self->socket_path,
&gst_shmdata_src_on_data,
&gst_shmdata_src_on_server_connect,
&gst_shmdata_src_on_server_disconnect,
self,
self->shmlogger);
GST_OBJECT_UNLOCK (self);
if (!self->shmfollower) {
GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
("Could not initialize shmdata follower %s", self->socket_path), (NULL));
return FALSE;
}
return TRUE;
}
