1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/gstreamer/GStreamerFormatHelper.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,78 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.8 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#if !defined(GStreamerFormatHelper_h_)
1.11 +#define GStreamerFormatHelper_h_
1.12 +
1.13 +#include <gst/gst.h>
1.14 +#include <mozilla/Types.h>
1.15 +#include "nsXPCOMStrings.h"
1.16 +
1.17 +namespace mozilla {
1.18 +
1.19 +class GStreamerFormatHelper {
1.20 + /* This class can be used to query the GStreamer registry for the required
1.21 + * demuxers/decoders from nsHTMLMediaElement::CanPlayType.
1.22 + * It implements looking at the GstRegistry to check if elements to
1.23 + * demux/decode the formats passed to CanPlayType() are actually installed.
1.24 + */
1.25 + public:
1.26 + static GStreamerFormatHelper* Instance();
1.27 + ~GStreamerFormatHelper();
1.28 +
1.29 + bool CanHandleMediaType(const nsACString& aMIMEType,
1.30 + const nsAString* aCodecs);
1.31 +
1.32 + bool CanHandleContainerCaps(GstCaps* aCaps);
1.33 + bool CanHandleCodecCaps(GstCaps* aCaps);
1.34 +
1.35 + static GstCaps* ConvertFormatsToCaps(const char* aMIMEType,
1.36 + const nsAString* aCodecs);
1.37 +
1.38 + static void Shutdown();
1.39 +
1.40 + private:
1.41 + GStreamerFormatHelper();
1.42 + char* const *CodecListFromCaps(GstCaps* aCaps);
1.43 + bool HaveElementsToProcessCaps(GstCaps* aCaps);
1.44 + GList* GetFactories();
1.45 +
1.46 + static GStreamerFormatHelper* gInstance;
1.47 +
1.48 + /* table to convert from container MIME types to GStreamer caps */
1.49 + static char const *const mContainers[6][2];
1.50 +
1.51 + /* table to convert from codec MIME types to GStreamer caps */
1.52 + static char const *const mCodecs[9][2];
1.53 +
1.54 + /*
1.55 + * True iff we were able to find the proper GStreamer libs and the functions
1.56 + * we need.
1.57 + */
1.58 + static bool sLoadOK;
1.59 +
1.60 + /* whitelist of supported container/codec gst caps */
1.61 + GstCaps* mSupportedContainerCaps;
1.62 + GstCaps* mSupportedCodecCaps;
1.63 +
1.64 + /* list of GStreamer element factories
1.65 + * Element factories are the basic types retrieved from the GStreamer
1.66 + * registry, they describe all plugins and elements that GStreamer can
1.67 + * create.
1.68 + * This means that element factories are useful for automated element
1.69 + * instancing, such as what autopluggers do,
1.70 + * and for creating lists of available elements. */
1.71 + GList* mFactories;
1.72 +
1.73 + /* Storage for the default registrys feature list cookie.
1.74 + * It changes every time a feature is added to or removed from the
1.75 + * GStreamer registry. */
1.76 + uint32_t mCookie;
1.77 +};
1.78 +
1.79 +} //namespace mozilla
1.80 +
1.81 +#endif
