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241 lines
6.8 KiB
C
241 lines
6.8 KiB
C
/* GStreamer Editing Services
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* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
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* 2009 Nokia Corporation
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gessource
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* @title: GESSource
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* @short_description: Base Class for single-media sources
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "ges-internal.h"
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#include "ges/ges-meta-container.h"
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#include "ges-track-element.h"
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#include "ges-source.h"
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#include "ges-layer.h"
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#include "gstframepositioner.h"
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struct _GESSourcePrivate
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{
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GstElement *topbin;
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GstElement *first_converter;
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GstElement *last_converter;
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GstPad *ghostpad;
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gboolean is_rendering_smartly;
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};
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G_DEFINE_TYPE_WITH_PRIVATE (GESSource, ges_source, GES_TYPE_TRACK_ELEMENT);
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/******************************
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* Internal helper methods *
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******************************/
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static GstElement *
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link_elements (GstElement * bin, GPtrArray * elements)
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{
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GstElement *element, *prev = NULL, *first = NULL;
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gint i;
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for (i = 0; i < elements->len; i++) {
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element = elements->pdata[i];
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if (!element)
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continue;
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gst_bin_add (GST_BIN (bin), element);
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if (prev) {
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if (!gst_element_link_pads_full (prev, "src", element, "sink",
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GST_PAD_LINK_CHECK_NOTHING)) {
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if (!gst_element_link (prev, element)) {
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g_error ("Could not link %s and %s", GST_OBJECT_NAME (prev),
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GST_OBJECT_NAME (element));
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}
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}
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}
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prev = element;
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if (first == NULL)
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first = element;
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}
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return prev;
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}
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static void
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_set_ghost_pad_target (GESSource * self, GstPad * srcpad, GstElement * element)
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{
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GstPadLinkReturn link_return;
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GESSourcePrivate *priv = self->priv;
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GESSourceClass *source_klass = GES_SOURCE_GET_CLASS (self);
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gboolean use_converter = ! !priv->first_converter;
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if (source_klass->select_pad && !source_klass->select_pad (self, srcpad)) {
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GST_INFO_OBJECT (self, "Ignoring pad %" GST_PTR_FORMAT, srcpad);
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return;
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}
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if (use_converter && priv->is_rendering_smartly) {
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GstPad *pad = gst_element_get_static_pad (priv->first_converter, "sink");
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use_converter = gst_pad_can_link (srcpad, pad);
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gst_object_unref (pad);
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}
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if (use_converter) {
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GstPad *converter_src, *sinkpad;
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converter_src = gst_element_get_static_pad (priv->last_converter, "src");
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if (!gst_ghost_pad_set_target (GST_GHOST_PAD (priv->ghostpad),
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converter_src)) {
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GST_ERROR_OBJECT (self, "Could not set ghost target");
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}
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sinkpad = gst_element_get_static_pad (priv->first_converter, "sink");
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link_return = gst_pad_link (srcpad, sinkpad);
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#ifndef GST_DISABLE_GST_DEBUG
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if (link_return != GST_PAD_LINK_OK) {
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GstCaps *srccaps = NULL;
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GstCaps *sinkcaps = NULL;
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srccaps = gst_pad_query_caps (srcpad, NULL);
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sinkcaps = gst_pad_query_caps (sinkpad, NULL);
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GST_ERROR_OBJECT (element, "Could not link source with "
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"conversion bin: %s (srcpad caps %" GST_PTR_FORMAT
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" sinkpad caps: %" GST_PTR_FORMAT ")",
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gst_pad_link_get_name (link_return), srccaps, sinkcaps);
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gst_caps_unref (srccaps);
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gst_caps_unref (sinkcaps);
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}
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#endif
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gst_object_unref (converter_src);
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gst_object_unref (sinkpad);
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} else {
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if (!gst_ghost_pad_set_target (GST_GHOST_PAD (priv->ghostpad), srcpad))
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GST_ERROR_OBJECT (self, "Could not set ghost target");
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}
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gst_element_no_more_pads (element);
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}
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/* @elements: (transfer-full) */
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GstElement *
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ges_source_create_topbin (GESSource * source, const gchar * bin_name,
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GstElement * sub_element, GPtrArray * elements)
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{
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GstElement *last;
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GstElement *bin;
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GstPad *sub_srcpad;
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GESSourcePrivate *priv = source->priv;
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bin = gst_bin_new (bin_name);
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if (!gst_bin_add (GST_BIN (bin), sub_element)) {
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GST_ERROR_OBJECT (source, "Could not add sub element: %" GST_PTR_FORMAT,
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sub_element);
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gst_object_unref (bin);
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return NULL;
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}
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priv->ghostpad = gst_object_ref (gst_ghost_pad_new_no_target ("src",
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GST_PAD_SRC));
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gst_pad_set_active (priv->ghostpad, TRUE);
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gst_element_add_pad (bin, priv->ghostpad);
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priv->topbin = gst_object_ref (bin);
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last = link_elements (bin, elements);
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if (last) {
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gint i = 0;
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while (!elements->pdata[i])
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i++;
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priv->first_converter = gst_object_ref (elements->pdata[i]);
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priv->last_converter = gst_object_ref (last);
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}
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sub_srcpad = gst_element_get_static_pad (sub_element, "src");
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if (sub_srcpad) {
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_set_ghost_pad_target (source, sub_srcpad, sub_element);
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gst_object_unref (sub_srcpad);
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} else {
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GST_INFO_OBJECT (source, "Waiting for pad added");
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g_signal_connect_swapped (sub_element, "pad-added",
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G_CALLBACK (_set_ghost_pad_target), source);
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}
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g_ptr_array_free (elements, TRUE);
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return bin;
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}
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void
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ges_source_set_rendering_smartly (GESSource * source,
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gboolean is_rendering_smartly)
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{
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if (is_rendering_smartly) {
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GESTrack *track = ges_track_element_get_track (GES_TRACK_ELEMENT (source));
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if (track && ges_track_get_mixing (track)) {
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GST_DEBUG_OBJECT (source, "Not rendering smartly as track is mixing!");
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source->priv->is_rendering_smartly = FALSE;
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return;
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}
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}
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source->priv->is_rendering_smartly = is_rendering_smartly;
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}
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gboolean
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ges_source_get_rendering_smartly (GESSource * source)
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{
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return source->priv->is_rendering_smartly;
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}
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static void
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ges_source_dispose (GObject * object)
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{
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GESSourcePrivate *priv = GES_SOURCE (object)->priv;
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gst_clear_object (&priv->first_converter);
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gst_clear_object (&priv->last_converter);
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gst_clear_object (&priv->topbin);
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gst_clear_object (&priv->ghostpad);
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G_OBJECT_CLASS (ges_source_parent_class)->dispose (object);
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}
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static void
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ges_source_class_init (GESSourceClass * klass)
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{
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GESTrackElementClass *track_class = GES_TRACK_ELEMENT_CLASS (klass);
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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track_class->nleobject_factorytype = "nlesource";
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track_class->create_element = NULL;
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object_class->dispose = ges_source_dispose;
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GES_TRACK_ELEMENT_CLASS_DEFAULT_HAS_INTERNAL_SOURCE (klass) = TRUE;
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}
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static void
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ges_source_init (GESSource * self)
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{
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self->priv = ges_source_get_instance_private (self);
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}
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