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 gboolean
shm_reader_fd_cb (GIOChannel *source,
GIOCondition condition,
gpointer data)
{
ShmReaderPrivate *priv = SHM_READER (data)->priv;
if (condition & G_IO_IN)
{
gchar *buf;
gulong ret;
ret = sp_client_recv (priv->client, &buf);
if (ret == -1)
{
goto error;
}
else if (ret > 0)
{
g_signal_emit (data, signals[SIGNAL_GOT_DATA], 0, ret, buf);
if (sp_client_recv_finish (priv->client, buf) == 0)
goto error;
}
/* else: it was a system message and already handled */
}
else if (condition & (G_IO_ERR | G_IO_HUP | G_IO_NVAL))
{
goto error;
}
return TRUE;
error:
shm_reader_disconnect (data);
return FALSE;
}
