/* Copyright (C) <2014> Intel Corporation * Copyright (C) <2014> Sreerenj Balachandran * * Author: Sreerenj Balachandran * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gstplaybackutils.h" static GstStaticCaps raw_audio_caps = GST_STATIC_CAPS ("audio/x-raw(ANY)"); static GstStaticCaps raw_video_caps = GST_STATIC_CAPS ("video/x-raw(ANY)"); /* unref the caps after usage */ static GstCaps * get_template_caps (GstElementFactory * factory, GstPadDirection direction) { const GList *templates; GstStaticPadTemplate *templ = NULL; GList *walk; templates = gst_element_factory_get_static_pad_templates (factory); for (walk = (GList *) templates; walk; walk = g_list_next (walk)) { templ = walk->data; if (templ->direction == direction) break; } if (templ) return gst_static_caps_get (&templ->static_caps); else return NULL; } static gboolean is_included (GList * list, GstCapsFeatures * cf) { for (; list; list = list->next) { if (gst_caps_features_is_equal ((GstCapsFeatures *) list->data, cf)) return TRUE; } return FALSE; } /* compute the number of common caps features */ guint gst_playback_utils_get_n_common_capsfeatures (GstElementFactory * fact1, GstElementFactory * fact2, GstPlayFlags flags, gboolean isaudioelement) { GstCaps *fact1_tmpl_caps, *fact2_tmpl_caps; GstCapsFeatures *fact1_features, *fact2_features; GstStructure *fact1_struct, *fact2_struct; GList *cf_list = NULL; guint fact1_caps_size, fact2_caps_size; guint i, j, n_common_cf = 0; GstCaps *raw_caps = (isaudioelement) ? gst_static_caps_get (&raw_audio_caps) : gst_static_caps_get (&raw_video_caps); GstStructure *raw_struct = gst_caps_get_structure (raw_caps, 0); gboolean native_raw = (isaudioelement ? !!(flags & GST_PLAY_FLAG_NATIVE_AUDIO) : !!(flags & GST_PLAY_FLAG_NATIVE_VIDEO)); fact1_tmpl_caps = get_template_caps (fact1, GST_PAD_SRC); fact2_tmpl_caps = get_template_caps (fact2, GST_PAD_SINK); if (!fact1_tmpl_caps || !fact2_tmpl_caps) { GST_ERROR ("Failed to get template caps from decoder or sink"); if (fact1_tmpl_caps) gst_caps_unref (fact1_tmpl_caps); else if (fact2_tmpl_caps) gst_caps_unref (fact2_tmpl_caps); return 0; } fact1_caps_size = gst_caps_get_size (fact1_tmpl_caps); fact2_caps_size = gst_caps_get_size (fact2_tmpl_caps); for (i = 0; i < fact1_caps_size; i++) { fact1_features = gst_caps_get_features ((const GstCaps *) fact1_tmpl_caps, i); if (gst_caps_features_is_any (fact1_features)) continue; fact1_struct = gst_caps_get_structure ((const GstCaps *) fact1_tmpl_caps, i); for (j = 0; j < fact2_caps_size; j++) { fact2_features = gst_caps_get_features ((const GstCaps *) fact2_tmpl_caps, j); if (gst_caps_features_is_any (fact2_features)) continue; fact2_struct = gst_caps_get_structure ((const GstCaps *) fact2_tmpl_caps, j); /* A common caps feature is given if the caps features are equal * and the structures can intersect. If the NATIVE_AUDIO/NATIVE_VIDEO * flags are not set we also allow if both structures are raw caps with * system memory caps features, because in that case we have converters in * place. */ if (gst_caps_features_is_equal (fact1_features, fact2_features) && (gst_structure_can_intersect (fact1_struct, fact2_struct) || (!native_raw && gst_caps_features_is_equal (fact1_features, GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY) && gst_structure_can_intersect (raw_struct, fact1_struct) && gst_structure_can_intersect (raw_struct, fact2_struct))) && !is_included (cf_list, fact2_features)) { cf_list = g_list_prepend (cf_list, fact2_features); n_common_cf++; } } } if (cf_list) g_list_free (cf_list); gst_caps_unref (fact1_tmpl_caps); gst_caps_unref (fact2_tmpl_caps); return n_common_cf; } gint gst_playback_utils_compare_factories_func (gconstpointer p1, gconstpointer p2) { GstPluginFeature *f1, *f2; gboolean is_parser1, is_parser2; f1 = (GstPluginFeature *) p1; f2 = (GstPluginFeature *) p2; is_parser1 = gst_element_factory_list_is_type (GST_ELEMENT_FACTORY_CAST (f1), GST_ELEMENT_FACTORY_TYPE_PARSER); is_parser2 = gst_element_factory_list_is_type (GST_ELEMENT_FACTORY_CAST (f2), GST_ELEMENT_FACTORY_TYPE_PARSER); /* We want all parsers first as we always want to plug parsers * before decoders */ if (is_parser1 && !is_parser2) return -1; else if (!is_parser1 && is_parser2) return 1; /* And if it's a both a parser we first sort by rank * and then by factory name */ return gst_plugin_feature_rank_compare_func (p1, p2); } /* gst_playback_utils_stream_in_list: * @streams: A list of #GstStream * @stream: A #GstStream * * Searchs whether the given @stream is present in @streams. This also handles * the case where the actual @stream was rewritten but contains the same * stream-id and type. * * Returns: TRUE if @stream is in @streams. * **/ gboolean gst_playback_utils_stream_in_list (GList * streams, GstStream * stream) { GList *iter; const gchar *stream_id = gst_stream_get_stream_id (stream); GstStreamType stream_type = gst_stream_get_stream_type (stream); for (iter = streams; iter; iter = iter->next) { GstStream *cand = iter->data; if (iter->data == stream) return TRUE; /* Compare the stream type */ if (gst_stream_get_stream_type (cand) != stream_type) continue; /* Compare the stream-id */ if (!g_strcmp0 (stream_id, gst_stream_get_stream_id (cand))) return TRUE; } return FALSE; }