1/* 2 * Copyright (C) 2013 Cable Television Laboratories, Inc. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 21 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 23 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#if ENABLE(VIDEO) && USE(GSTREAMER) && ENABLE(VIDEO_TRACK) 28 29#include "TextSinkGStreamer.h" 30 31GST_DEBUG_CATEGORY_STATIC(webkitTextSinkDebug); 32#define GST_CAT_DEFAULT webkitTextSinkDebug 33 34#define webkit_text_sink_parent_class parent_class 35G_DEFINE_TYPE_WITH_CODE(WebKitTextSink, webkit_text_sink, GST_TYPE_APP_SINK, 36 GST_DEBUG_CATEGORY_INIT(webkitTextSinkDebug, "webkittextsink", 0, 37 "webkit text sink")); 38 39enum { 40 Prop0, 41 PropSync, 42 PropLast 43}; 44 45static void webkit_text_sink_init(WebKitTextSink* sink) 46{ 47 /* We want to get cues as quickly as possible so WebKit has time to handle them, 48 * and we don't want cues to block when they come in the wrong order. */ 49 gst_base_sink_set_sync(GST_BASE_SINK(sink), false); 50} 51 52static void webkitTextSinkGetProperty(GObject*, guint /* propertyId */, 53 GValue*, GParamSpec*) 54{ 55 /* Do nothing with PropSync */ 56} 57 58static void webkitTextSinkSetProperty(GObject*, guint /* propertyId */, 59 const GValue*, GParamSpec*) 60{ 61 /* Do nothing with PropSync */ 62} 63 64static gboolean webkitTextSinkQuery(GstElement *element, GstQuery *query) 65{ 66 switch (GST_QUERY_TYPE(query)) { 67 case GST_QUERY_DURATION: 68 case GST_QUERY_POSITION: 69 /* Ignore duration and position because we don't want the seek bar to be 70 * based on where the cues are. */ 71 return false; 72 default: 73 WebKitTextSink* sink = WEBKIT_TEXT_SINK(element); 74 GstElement* parent = GST_ELEMENT(&sink->parent); 75 return GST_ELEMENT_CLASS(parent_class)->query(parent, query); 76 } 77} 78 79static void webkit_text_sink_class_init(WebKitTextSinkClass* klass) 80{ 81 GObjectClass* gobjectClass = G_OBJECT_CLASS(klass); 82 GstElementClass* elementClass = GST_ELEMENT_CLASS(klass); 83 84 gst_element_class_set_metadata(elementClass, "WebKit text sink", "Generic", 85 "An appsink that ignores the sync property and position and duration queries", 86 "Brendan Long <b.long@cablelabs.com>"); 87 88 gobjectClass->get_property = GST_DEBUG_FUNCPTR(webkitTextSinkGetProperty); 89 gobjectClass->set_property = GST_DEBUG_FUNCPTR(webkitTextSinkSetProperty); 90 elementClass->query = GST_DEBUG_FUNCPTR(webkitTextSinkQuery); 91 92 /* Override "sync" so playsink doesn't mess with our appsink */ 93 g_object_class_override_property(gobjectClass, PropSync, "sync"); 94} 95 96GstElement* webkitTextSinkNew() 97{ 98 return GST_ELEMENT(g_object_new(WEBKIT_TYPE_TEXT_SINK, 0)); 99} 100 101#endif // ENABLE(VIDEO) && USE(GSTREAMER) && ENABLE(VIDEO_TRACK) 102