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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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262 lines
6.9 KiB
C
262 lines
6.9 KiB
C
/*
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* GStreamer
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* Copyright (C) 2008 Nokia Corporation <multimedia@maemo.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:camerabingeneral
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* @short_description: helper functions for #GstCameraBin and it's modules
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*
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* Common helper functions for #GstCameraBin, #GstCameraBinImage and
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* #GstCameraBinVideo.
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*
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*/
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#include "camerabingeneral.h"
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#include <glib.h>
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GST_DEBUG_CATEGORY (gst_camerabin_debug);
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static gboolean
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camerabin_general_dbg_have_event (GstPad * pad, GstEvent * event,
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gpointer u_data)
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{
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_NEWSEGMENT:
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{
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GstElement *elem = (GstElement *) u_data;
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gchar *elem_name = gst_element_get_name (elem);
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gchar *pad_name = gst_pad_get_name (pad);
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gboolean update;
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gdouble rate;
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GstFormat format;
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gint64 start, stop, pos;
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gst_event_parse_new_segment (event, &update, &rate, &format, &start,
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&stop, &pos);
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GST_DEBUG ("element %s, pad %s, new_seg_start =%" GST_TIME_FORMAT
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", new_seg_stop =%" GST_TIME_FORMAT
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", new_seg_pos =%" GST_TIME_FORMAT "\n", elem_name, pad_name,
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GST_TIME_ARGS (start), GST_TIME_ARGS (stop), GST_TIME_ARGS (pos));
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g_free (pad_name);
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g_free (elem_name);
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}
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break;
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default:
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break;
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}
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return TRUE;
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}
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static gboolean
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camerabin_general_dbg_have_buffer (GstPad * pad, GstBuffer * buffer,
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gpointer u_data)
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{
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GstElement *elem = (GstElement *) u_data;
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gchar *elem_name = gst_element_get_name (elem);
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gchar *pad_name = gst_pad_get_name (pad);
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GST_DEBUG ("element %s, pad %s, buf_ts =%" GST_TIME_FORMAT "\n", elem_name,
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pad_name, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
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g_free (pad_name);
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g_free (elem_name);
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return TRUE;
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}
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void
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camerabin_general_dbg_set_probe (GstElement * elem, gchar * pad_name,
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gboolean buf, gboolean evt)
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{
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GstPad *pad = gst_element_get_static_pad (elem, pad_name);
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if (buf)
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gst_pad_add_buffer_probe (pad,
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G_CALLBACK (camerabin_general_dbg_have_buffer), elem);
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if (evt)
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gst_pad_add_event_probe (pad,
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G_CALLBACK (camerabin_general_dbg_have_event), elem);
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gst_object_unref (pad);
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}
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/**
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* gst_camerabin_add_element:
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* @bin: add an element to this bin
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* @new_elem: new element to be added
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*
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* Adds given element to given @bin. Looks for an unconnected src pad
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* from the @bin and links the element to it. Raises an error if adding
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* or linking failed.
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*
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* Returns: %TRUE if adding and linking succeeded, %FALSE otherwise.
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*/
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gboolean
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gst_camerabin_add_element (GstBin * bin, GstElement * new_elem)
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{
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gboolean ret = FALSE;
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ret = gst_camerabin_try_add_element (bin, new_elem);
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if (!ret) {
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gchar *elem_name = gst_element_get_name (new_elem);
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GST_ELEMENT_ERROR (bin, CORE, NEGOTIATION, (NULL),
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("linking %s failed", elem_name));
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g_free (elem_name);
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}
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return ret;
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}
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/**
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* gst_camerabin_try_add_element:
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* @bin: tries adding an element to this bin
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* @new_elem: new element to be added
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*
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* Adds given element to given @bin. Looks for an unconnected src pad
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* from the @bin and links the element to it.
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*
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* Returns: %TRUE if adding and linking succeeded, %FALSE otherwise.
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*/
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gboolean
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gst_camerabin_try_add_element (GstBin * bin, GstElement * new_elem)
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{
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GstPad *bin_pad;
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GstElement *bin_elem;
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gboolean ret = TRUE;
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if (!bin || !new_elem) {
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return FALSE;
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}
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/* Get pads for linking */
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GST_DEBUG ("finding unconnected src pad");
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bin_pad = gst_bin_find_unlinked_pad (bin, GST_PAD_SRC);
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GST_DEBUG ("unconnected pad %s:%s", GST_DEBUG_PAD_NAME (bin_pad));
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/* Add to bin */
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gst_bin_add (GST_BIN (bin), new_elem);
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/* Link, if unconnected pad was found, otherwise just add it to bin */
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if (bin_pad) {
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bin_elem = gst_pad_get_parent_element (bin_pad);
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gst_object_unref (bin_pad);
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if (!gst_element_link (bin_elem, new_elem)) {
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gst_bin_remove (bin, new_elem);
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ret = FALSE;
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}
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gst_object_unref (bin_elem);
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}
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return ret;
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}
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/**
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* gst_camerabin_create_and_add_element:
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* @bin: tries adding an element to this bin
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* @elem_name: name of the element to be created
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*
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* Creates an element according to given name and
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* adds it to given @bin. Looks for an unconnected src pad
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* from the @bin and links the element to it.
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*
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* Returns: pointer to the new element if successful, NULL otherwise.
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*/
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GstElement *
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gst_camerabin_create_and_add_element (GstBin * bin, const gchar * elem_name)
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{
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GstElement *new_elem = NULL;
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GST_DEBUG ("adding %s", elem_name);
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new_elem = gst_element_factory_make (elem_name, NULL);
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if (!new_elem) {
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GST_ELEMENT_ERROR (bin, CORE, MISSING_PLUGIN, (NULL),
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("could not create \"%s\" element.", elem_name));
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} else if (!gst_camerabin_add_element (bin, new_elem)) {
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new_elem = NULL;
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}
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return new_elem;
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}
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/**
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* gst_camerabin_remove_elements_from_bin:
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* @bin: removes all elements from this bin
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*
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* Removes all elements from this @bin.
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*/
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void
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gst_camerabin_remove_elements_from_bin (GstBin * bin)
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{
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GstIterator *iter = NULL;
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gpointer data = NULL;
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GstElement *elem = NULL;
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gboolean done = FALSE;
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iter = gst_bin_iterate_elements (bin);
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while (!done) {
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switch (gst_iterator_next (iter, &data)) {
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case GST_ITERATOR_OK:
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elem = GST_ELEMENT (data);
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gst_bin_remove (bin, elem);
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/* Iterator increased the element refcount, so unref */
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gst_object_unref (elem);
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break;
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case GST_ITERATOR_RESYNC:
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gst_iterator_resync (iter);
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break;
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case GST_ITERATOR_ERROR:
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GST_WARNING_OBJECT (bin, "error in iterating elements");
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done = TRUE;
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break;
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case GST_ITERATOR_DONE:
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done = TRUE;
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break;
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}
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}
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gst_iterator_free (iter);
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}
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/**
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* gst_camerabin_drop_eos_probe:
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* @pad: pad receiving the event
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* @event: received event
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* @u_data: not used
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*
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* Event probe that drop all eos events.
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*
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* Returns: FALSE to drop the event, TRUE otherwise
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*/
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gboolean
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gst_camerabin_drop_eos_probe (GstPad * pad, GstEvent * event, gpointer u_data)
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{
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gboolean ret = TRUE;
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_EOS:
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GST_DEBUG ("dropping eos in %s:%s", GST_DEBUG_PAD_NAME (pad));
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ret = FALSE;
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break;
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default:
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break;
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}
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return ret;
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}
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