mirror of
https://github.com/classilla/tenfourfox.git
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82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#if !defined(GStreamerFormatHelper_h_)
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#define GStreamerFormatHelper_h_
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#include <gst/gst.h>
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#include <mozilla/Types.h>
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#include "nsXPCOMStrings.h"
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namespace mozilla {
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class GStreamerFormatHelper {
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/* This class can be used to query the GStreamer registry for the required
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* demuxers/decoders from nsHTMLMediaElement::CanPlayType.
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* It implements looking at the GstRegistry to check if elements to
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* demux/decode the formats passed to CanPlayType() are actually installed.
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*/
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public:
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static GStreamerFormatHelper* Instance();
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~GStreamerFormatHelper();
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bool CanHandleMediaType(const nsACString& aMIMEType,
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const nsAString* aCodecs);
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bool CanHandleContainerCaps(GstCaps* aCaps);
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bool CanHandleCodecCaps(GstCaps* aCaps);
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static bool IsBlockListEnabled();
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static bool IsPluginFeatureBlocked(GstPluginFeature *aFeature);
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static GstCaps* ConvertFormatsToCaps(const char* aMIMEType,
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const nsAString* aCodecs);
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static void Shutdown();
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private:
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GStreamerFormatHelper();
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char* const *CodecListFromCaps(GstCaps* aCaps);
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bool HaveElementsToProcessCaps(GstCaps* aCaps);
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GList* GetFactories();
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static GStreamerFormatHelper* gInstance;
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/* table to convert from container MIME types to GStreamer caps */
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static char const *const mContainers[6][2];
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/* table to convert from codec MIME types to GStreamer caps */
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static char const *const mCodecs[9][2];
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/*
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* True iff we were able to find the proper GStreamer libs and the functions
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* we need.
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*/
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static bool sLoadOK;
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/* whitelist of supported container/codec gst caps */
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GstCaps* mSupportedContainerCaps;
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GstCaps* mSupportedCodecCaps;
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/* list of GStreamer element factories
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* Element factories are the basic types retrieved from the GStreamer
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* registry, they describe all plugins and elements that GStreamer can
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* create.
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* This means that element factories are useful for automated element
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* instancing, such as what autopluggers do,
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* and for creating lists of available elements. */
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GList* mFactories;
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/* Storage for the default registrys feature list cookie.
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* It changes every time a feature is added to or removed from the
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* GStreamer registry. */
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uint32_t mCookie;
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};
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} //namespace mozilla
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#endif
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