static GstStateChangeReturn
gst_shm_src_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstShmSrc *self = GST_SHM_SRC (element);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
if (gst_base_src_is_live (GST_BASE_SRC (element)))
if (!gst_shm_src_start_reading (self))
return GST_STATE_CHANGE_FAILURE;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
if (gst_base_src_is_live (GST_BASE_SRC (element)))
gst_shm_src_stop_reading (self);
default:
break;
}
return ret;
}
static void
gst_shm_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstShmSrc *self = GST_SHM_SRC (object);
switch (prop_id) {
case PROP_SOCKET_PATH:
GST_OBJECT_LOCK (object);
g_value_set_string (value, self->socket_path);
GST_OBJECT_UNLOCK (object);
break;
case PROP_IS_LIVE:
g_value_set_boolean (value, gst_base_src_is_live (GST_BASE_SRC (object)));
break;
case PROP_SHM_AREA_NAME:
GST_OBJECT_LOCK (object);
if (self->pipe)
g_value_set_string (value, sp_get_shm_area_name (self->pipe->pipe));
GST_OBJECT_UNLOCK (object);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_shm_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstShmSrc *self = GST_SHM_SRC (object);
switch (prop_id) {
case PROP_SOCKET_PATH:
GST_OBJECT_LOCK (object);
if (self->pipe) {
GST_WARNING_OBJECT (object, "Can not modify socket path while the "
"element is playing");
} else {
g_free (self->socket_path);
self->socket_path = g_value_dup_string (value);
}
GST_OBJECT_UNLOCK (object);
break;
case PROP_IS_LIVE:
gst_base_src_set_live (GST_BASE_SRC (object),
g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_shm_src_stop (GstBaseSrc * bsrc)
{
if (!gst_base_src_is_live (bsrc))
gst_shm_src_stop_reading (GST_SHM_SRC (bsrc));
return TRUE;
}
static gboolean
gst_shm_src_start (GstBaseSrc * bsrc)
{
if (gst_base_src_is_live (bsrc))
return TRUE;
else
return gst_shm_src_start_reading (GST_SHM_SRC (bsrc));
}
static GstFlowReturn
gst_shm_src_create (GstPushSrc * psrc, GstBuffer ** outbuf)
{
GstShmSrc *self = GST_SHM_SRC (psrc);
gchar *buf = NULL;
int rv = 0;
struct GstShmBuffer *gsb;
do {
if (gst_poll_wait (self->poll, GST_CLOCK_TIME_NONE) < 0) {
if (errno == EBUSY)
return GST_FLOW_FLUSHING;
GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed to read from shmsrc"),
("Poll failed on fd: %s", strerror (errno)));
return GST_FLOW_ERROR;
}
if (self->unlocked)
return GST_FLOW_FLUSHING;
if (gst_poll_fd_has_closed (self->poll, &self->pollfd)) {
GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed to read from shmsrc"),
("Control socket has closed"));
return GST_FLOW_ERROR;
}
if (gst_poll_fd_has_error (self->poll, &self->pollfd)) {
GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed to read from shmsrc"),
("Control socket has error"));
return GST_FLOW_ERROR;
}
if (gst_poll_fd_can_read (self->poll, &self->pollfd)) {
buf = NULL;
GST_LOG_OBJECT (self, "Reading from pipe");
GST_OBJECT_LOCK (self);
rv = sp_client_recv (self->pipe->pipe, &buf);
GST_OBJECT_UNLOCK (self);
if (rv < 0) {
GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed to read from shmsrc"),
("Error reading control data: %d", rv));
return GST_FLOW_ERROR;
}
}
} while (buf == NULL);
GST_LOG_OBJECT (self, "Got buffer %p of size %d", buf, rv);
gsb = g_slice_new0 (struct GstShmBuffer);
gsb->buf = buf;
gsb->pipe = self->pipe;
gst_shm_pipe_inc (self->pipe);
*outbuf = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY,
buf, rv, 0, rv, gsb, free_buffer);
return GST_FLOW_OK;
}
static void
gst_shm_src_finalize (GObject * object)
{
GstShmSrc *self = GST_SHM_SRC (object);
gst_poll_free (self->poll);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_shm_src_unlock_stop (GstBaseSrc * bsrc)
{
GstShmSrc *self = GST_SHM_SRC (bsrc);
self->unlocked = FALSE;
gst_poll_set_flushing (self->poll, FALSE);
return TRUE;
}
static gboolean
gst_shm_src_unlock (GstBaseSrc * bsrc)
{
GstShmSrc *self = GST_SHM_SRC (bsrc);
self->unlocked = TRUE;
if (self->poll)
gst_poll_set_flushing (self->poll, TRUE);
return TRUE;
}
static gboolean
gst_shm_src_stop (GstBaseSrc * bsrc)
{
GstShmSrc *self = GST_SHM_SRC (bsrc);
GST_DEBUG_OBJECT (self, "Stopping %p", self);
if (self->pipe) {
gst_shm_pipe_dec (self->pipe);
self->pipe = NULL;
}
gst_poll_free (self->poll);
self->poll = NULL;
return TRUE;
}
static gboolean
gst_shm_src_start (GstBaseSrc * bsrc)
{
GstShmSrc *self = GST_SHM_SRC (bsrc);
GstShmPipe *gstpipe = g_slice_new0 (GstShmPipe);
gstpipe->use_count = 1;
gstpipe->src = gst_object_ref (self);
if (!self->socket_path) {
GST_ELEMENT_ERROR (bsrc, RESOURCE, NOT_FOUND,
("No path specified for socket."), (NULL));
return FALSE;
}
GST_DEBUG ("Opening socket %s", self->socket_path);
GST_OBJECT_LOCK (self);
gstpipe->pipe = sp_client_open (self->socket_path);
GST_OBJECT_UNLOCK (self);
if (!gstpipe->pipe) {
GST_ELEMENT_ERROR (bsrc, RESOURCE, OPEN_READ_WRITE,
("Could not open socket %s: %d %s", self->socket_path, errno,
strerror (errno)), (NULL));
gst_shm_pipe_dec (gstpipe);
return FALSE;
}
self->pipe = gstpipe;
self->poll = gst_poll_new (TRUE);
gst_poll_fd_init (&self->pollfd);
self->pollfd.fd = sp_get_fd (self->pipe->pipe);
gst_poll_add_fd (self->poll, &self->pollfd);
gst_poll_fd_ctl_read (self->poll, &self->pollfd, TRUE);
return TRUE;
}
