mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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473 lines
13 KiB
C
473 lines
13 KiB
C
/* GStreamer
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* Copyright (C) <2009> Jan Schmidt <thaytan@noraisin.net>
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* Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
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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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <gst/video/video.h>
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#include <gst/audio/audio.h>
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#include "rsndec.h"
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GST_DEBUG_CATEGORY_STATIC (rsn_dec_debug);
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#define GST_CAT_DEFAULT rsn_dec_debug
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static GstStateChangeReturn rsn_dec_change_state (GstElement * element,
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GstStateChange transition);
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static void rsn_dec_dispose (GObject * gobj);
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static void cleanup_child (RsnDec * self);
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static GstBinClass *rsn_dec_parent_class = NULL;
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static void
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rsn_dec_class_init (RsnDecClass * klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GST_DEBUG_CATEGORY_INIT (rsn_dec_debug, "rsndec",
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0, "Resin DVD stream decoder");
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rsn_dec_parent_class = (GstBinClass *) g_type_class_peek_parent (klass);
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object_class->dispose = rsn_dec_dispose;
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element_class->change_state = GST_DEBUG_FUNCPTR (rsn_dec_change_state);
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}
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static gboolean
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rsn_dec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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RsnDec *self = RSN_DEC (parent);
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gboolean ret = TRUE;
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const GstStructure *s = gst_event_get_structure (event);
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const gchar *name = (s ? gst_structure_get_name (s) : NULL);
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if (name && g_str_equal (name, "application/x-gst-dvd"))
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ret = gst_pad_push_event (GST_PAD_CAST (self->srcpad), event);
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else
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ret = self->sink_event_func (pad, parent, event);
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return ret;
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}
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static void
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rsn_dec_init (RsnDec * self, RsnDecClass * klass)
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{
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GstPadTemplate *templ;
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templ =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "sink");
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g_assert (templ != NULL);
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self->sinkpad =
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GST_GHOST_PAD_CAST (gst_ghost_pad_new_no_target_from_template ("sink",
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templ));
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self->sink_event_func = GST_PAD_EVENTFUNC (self->sinkpad);
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gst_pad_set_event_function (GST_PAD_CAST (self->sinkpad),
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GST_DEBUG_FUNCPTR (rsn_dec_sink_event));
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templ = gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
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g_assert (templ != NULL);
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self->srcpad =
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GST_GHOST_PAD_CAST (gst_ghost_pad_new_no_target_from_template ("src",
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templ));
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gst_element_add_pad (GST_ELEMENT (self), GST_PAD_CAST (self->sinkpad));
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gst_element_add_pad (GST_ELEMENT (self), GST_PAD_CAST (self->srcpad));
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}
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static void
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rsn_dec_dispose (GObject * object)
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{
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RsnDec *self = (RsnDec *) object;
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cleanup_child (self);
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G_OBJECT_CLASS (rsn_dec_parent_class)->dispose (object);
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}
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static gboolean
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rsn_dec_set_child (RsnDec * self, GstElement * new_child)
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{
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GstPad *child_pad;
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if (self->current_decoder) {
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gst_ghost_pad_set_target (self->srcpad, NULL);
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gst_ghost_pad_set_target (self->sinkpad, NULL);
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gst_bin_remove ((GstBin *) self, self->current_decoder);
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self->current_decoder = NULL;
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}
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if (new_child == NULL)
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return TRUE;
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if (!gst_bin_add ((GstBin *) self, new_child))
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return FALSE;
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child_pad = gst_element_get_static_pad (new_child, "sink");
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if (child_pad == NULL) {
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return FALSE;
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}
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gst_ghost_pad_set_target (self->sinkpad, child_pad);
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gst_object_unref (child_pad);
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child_pad = gst_element_get_static_pad (new_child, "src");
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if (child_pad == NULL) {
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return FALSE;
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}
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gst_ghost_pad_set_target (self->srcpad, child_pad);
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gst_object_unref (child_pad);
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GST_DEBUG_OBJECT (self, "Add child %" GST_PTR_FORMAT, new_child);
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self->current_decoder = new_child;
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gst_element_sync_state_with_parent (new_child);
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return TRUE;
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}
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static void
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cleanup_child (RsnDec * self)
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{
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GST_DEBUG_OBJECT (self, "Removing child element");
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(void) rsn_dec_set_child (self, NULL);
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}
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typedef struct
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{
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GstCaps *desired_caps;
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GstCaps *decoder_caps;
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} RsnDecFactoryFilterCtx;
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static gboolean
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rsndec_factory_filter (GstPluginFeature * feature, RsnDecFactoryFilterCtx * ctx)
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{
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GstElementFactory *factory;
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guint rank;
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const gchar *klass;
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const GList *templates;
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GList *walk;
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gboolean can_sink = FALSE;
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/* we only care about element factories */
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if (!GST_IS_ELEMENT_FACTORY (feature))
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return FALSE;
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factory = GST_ELEMENT_FACTORY (feature);
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klass =
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gst_element_factory_get_metadata (factory, GST_ELEMENT_METADATA_KLASS);
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/* only decoders can play */
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if (strstr (klass, "Decoder") == NULL)
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return FALSE;
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/* only select elements with autoplugging rank */
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rank = gst_plugin_feature_get_rank (feature);
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if (rank < GST_RANK_MARGINAL)
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return FALSE;
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/* See if the element has a sink pad that can possibly sink this caps */
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/* get the templates from the element factory */
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templates = gst_element_factory_get_static_pad_templates (factory);
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for (walk = (GList *) templates; walk && !can_sink; walk = g_list_next (walk)) {
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GstStaticPadTemplate *templ = walk->data;
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/* we only care about the sink templates */
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if (templ->direction == GST_PAD_SINK) {
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GstCaps *intersect;
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GstCaps *tmpl_caps;
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/* try to intersect the caps with the caps of the template */
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tmpl_caps = gst_static_caps_get (&templ->static_caps);
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intersect = gst_caps_intersect (ctx->desired_caps, tmpl_caps);
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gst_caps_unref (tmpl_caps);
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/* check if the intersection is empty */
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if (!gst_caps_is_empty (intersect)) {
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/* non empty intersection, we can use this element */
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can_sink = TRUE;
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ctx->decoder_caps = gst_caps_merge (ctx->decoder_caps, intersect);
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} else
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gst_caps_unref (intersect);
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}
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}
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if (can_sink) {
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GST_DEBUG ("Found decoder element %s (%s)",
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gst_element_factory_get_metadata (factory,
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GST_ELEMENT_METADATA_LONGNAME),
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gst_plugin_feature_get_name (feature));
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}
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return can_sink;
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}
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static gint
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sort_by_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
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{
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gint diff;
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const gchar *rname1, *rname2;
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diff = gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
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if (diff != 0)
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return diff;
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rname1 = gst_plugin_feature_get_name (f1);
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rname2 = gst_plugin_feature_get_name (f2);
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diff = strcmp (rname2, rname1);
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return diff;
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}
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static gpointer
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_get_decoder_factories (gpointer arg)
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{
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GstElementClass *klass = arg;
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GList *factories;
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GstPadTemplate *templ = gst_element_class_get_pad_template (klass,
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"sink");
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RsnDecFactoryFilterCtx ctx = { NULL, };
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GstCaps *raw;
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gboolean raw_audio;
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GstRegistry *registry = gst_registry_get ();
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ctx.desired_caps = gst_pad_template_get_caps (templ);
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raw =
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gst_caps_from_string
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("audio/x-raw,format=(string){ F32LE, F32BE, F64LE, F64BE }");
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raw_audio = gst_caps_can_intersect (raw, ctx.desired_caps);
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if (raw_audio) {
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GstCaps *sub = gst_caps_subtract (ctx.desired_caps, raw);
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ctx.desired_caps = sub;
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} else {
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gst_caps_ref (ctx.desired_caps);
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}
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gst_caps_unref (raw);
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/* Set decoder caps to empty. Will be filled by the factory_filter */
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ctx.decoder_caps = gst_caps_new_empty ();
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GST_DEBUG ("Finding factories for caps: %" GST_PTR_FORMAT, ctx.desired_caps);
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factories = gst_registry_feature_filter (registry,
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(GstPluginFeatureFilter) rsndec_factory_filter, FALSE, &ctx);
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/* If these are audio caps, we add audioconvert, which is not a decoder,
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but allows raw audio to go through relatively unmolested - this will
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come handy when we have to send placeholder silence to allow preroll
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for those DVDs which have titles with no audio track. */
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if (raw_audio) {
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GstPluginFeature *feature;
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GST_DEBUG ("These are audio caps, adding audioconvert");
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feature =
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gst_registry_find_feature (registry, "audioconvert",
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GST_TYPE_ELEMENT_FACTORY);
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if (feature) {
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factories = g_list_append (factories, feature);
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} else {
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GST_WARNING ("Could not find feature audioconvert");
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}
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}
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factories = g_list_sort (factories, (GCompareFunc) sort_by_ranks);
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GST_DEBUG ("Available decoder caps %" GST_PTR_FORMAT, ctx.decoder_caps);
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gst_caps_unref (ctx.decoder_caps);
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gst_caps_unref (ctx.desired_caps);
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return factories;
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}
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static GstStateChangeReturn
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rsn_dec_change_state (GstElement * element, GstStateChange transition)
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{
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GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
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RsnDec *self = RSN_DEC (element);
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RsnDecClass *klass = RSN_DEC_GET_CLASS (element);
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:{
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GstElement *new_child;
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const GList *decoder_factories;
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new_child = gst_element_factory_make ("autoconvert", NULL);
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decoder_factories = klass->get_decoder_factories (klass);
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g_object_set (G_OBJECT (new_child), "factories", decoder_factories, NULL);
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if (new_child == NULL || !rsn_dec_set_child (self, new_child))
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ret = GST_STATE_CHANGE_FAILURE;
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break;
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}
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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break;
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default:
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break;
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}
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if (ret == GST_STATE_CHANGE_FAILURE)
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return ret;
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ret =
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GST_ELEMENT_CLASS (rsn_dec_parent_class)->change_state (element,
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transition);
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if (ret == GST_STATE_CHANGE_FAILURE)
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return ret;
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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break;
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case GST_STATE_CHANGE_READY_TO_NULL:
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cleanup_child (self);
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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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GType
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rsn_dec_get_type (void)
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{
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static volatile gsize type = 0;
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if (g_once_init_enter (&type)) {
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GType _type;
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static const GTypeInfo type_info = {
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sizeof (RsnDecClass),
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NULL,
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NULL,
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(GClassInitFunc) rsn_dec_class_init,
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NULL,
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NULL,
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sizeof (RsnDec),
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0,
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(GInstanceInitFunc) rsn_dec_init,
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};
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_type = g_type_register_static (GST_TYPE_BIN,
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"RsnDec", &type_info, G_TYPE_FLAG_ABSTRACT);
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g_once_init_leave (&type, _type);
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}
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return type;
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}
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/** Audio decoder subclass */
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static GstStaticPadTemplate audio_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/mpeg,mpegversion=(int)1;"
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"audio/x-private1-lpcm;"
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"audio/x-private1-ac3;" "audio/ac3;" "audio/x-ac3;"
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"audio/x-private1-dts; audio/x-raw,format=(string)"
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GST_AUDIO_FORMATS_ALL)
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);
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static GstStaticPadTemplate audio_src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_AUDIO_CAPS_MAKE (GST_AUDIO_FORMATS_ALL))
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);
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G_DEFINE_TYPE (RsnAudioDec, rsn_audiodec, RSN_TYPE_DEC);
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static const GList *
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rsn_audiodec_get_decoder_factories (RsnDecClass * klass)
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{
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static GOnce gonce = G_ONCE_INIT;
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g_once (&gonce, _get_decoder_factories, klass);
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return (const GList *) gonce.retval;
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}
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static void
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rsn_audiodec_class_init (RsnAudioDecClass * klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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RsnDecClass *dec_class = RSN_DEC_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&audio_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&audio_sink_template));
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gst_element_class_set_static_metadata (element_class, "RsnAudioDec",
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"Audio/Decoder",
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"Resin DVD audio stream decoder", "Jan Schmidt <thaytan@noraisin.net>");
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dec_class->get_decoder_factories = rsn_audiodec_get_decoder_factories;
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}
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static void
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rsn_audiodec_init (RsnAudioDec * self)
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{
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}
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/** Video decoder subclass */
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static GstStaticPadTemplate video_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/mpeg, "
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"mpegversion = (int) [ 1, 2 ], " "systemstream = (bool) FALSE")
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);
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static GstStaticPadTemplate video_src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL))
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);
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G_DEFINE_TYPE (RsnVideoDec, rsn_videodec, RSN_TYPE_DEC);
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static const GList *
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rsn_videodec_get_decoder_factories (RsnDecClass * klass)
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{
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static GOnce gonce = G_ONCE_INIT;
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g_once (&gonce, _get_decoder_factories, klass);
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return (const GList *) gonce.retval;
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}
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static void
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rsn_videodec_class_init (RsnAudioDecClass * klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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RsnDecClass *dec_class = RSN_DEC_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&video_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&video_sink_template));
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gst_element_class_set_static_metadata (element_class, "RsnVideoDec",
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"Video/Decoder",
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"Resin DVD video stream decoder", "Jan Schmidt <thaytan@noraisin.net>");
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dec_class->get_decoder_factories = rsn_videodec_get_decoder_factories;
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}
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static void
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rsn_videodec_init (RsnVideoDec * self)
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{
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}
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