# HG changeset patch

# Parent 9fe99f8a584f2369a88bfb5281fd6bc95eb2593c

Bug 760140 - Query the GstRegistry for the required demuxers/decoders from canPlayType

diff --git a/content/media/DecoderTraits.cpp b/content/media/DecoderTraits.cpp

--- a/content/media/DecoderTraits.cpp

+++ b/content/media/DecoderTraits.cpp

@@ -7,16 +7,18 @@

 #include "DecoderTraits.h"

 #include "MediaDecoder.h"

 #include "nsCharSeparatedTokenizer.h"

 #ifdef MOZ_MEDIA_PLUGINS

 #include "MediaPluginHost.h"

 #endif

 #ifdef MOZ_GSTREAMER

 #include "mozilla/Preferences.h"

+#include "GStreamerDecoder.h"

+#include "nsXPCOMStrings.h"

 #endif

 #ifdef MOZ_WMF

 #include "WMFDecoder.h"

 #endif

 namespace mozilla

 {

@@ -137,48 +139,35 @@

     return false;

   }

   return CodecListContains(gWebMTypes, aType);

 }

 #endif

 #ifdef MOZ_GSTREAMER

-static const char* const gH264Types[4] = {

-  "video/mp4",

-  "video/3gpp",

-  "video/quicktime",

-  nullptr

-};

-

 bool

 DecoderTraits::IsGStreamerSupportedType(const nsACString& aMimeType)

 {

   if (!MediaDecoder::IsGStreamerEnabled())

     return false;

-  if (IsH264Type(aMimeType))

+  if (GStreamerDecoder::CanHandleMediaType(aMimeType, nullptr))

     return true;

   if (!Preferences::GetBool("media.prefer-gstreamer", false))

     return false;

 #ifdef MOZ_WEBM

   if (IsWebMType(aMimeType))

     return true;

 #endif

 #ifdef MOZ_OGG

   if (IsOggType(aMimeType))

     return true;

 #endif

   return false;

 }

-

-bool

-DecoderTraits::IsH264Type(const nsACString& aType)

-{

-  return CodecListContains(gH264Types, aType);

-}

 #endif

 #ifdef MOZ_WIDGET_GONK

 static const char* const gOmxTypes[6] = {

   "audio/mpeg",

   "audio/mp4",

   "video/mp4",

   "video/3gpp",

@@ -190,19 +179,17 @@

 DecoderTraits::IsOmxSupportedType(const nsACString& aType)

 {

   if (!MediaDecoder::IsOmxEnabled()) {

     return false;

   }

   return CodecListContains(gOmxTypes, aType);

 }

-#endif

-#if defined(MOZ_GSTREAMER) || defined(MOZ_WIDGET_GONK)

 static char const *const gH264Codecs[9] = {

   "avc1.42E01E",  // H.264 Constrained Baseline Profile Level 3.0

   "avc1.42001E",  // H.264 Baseline Profile Level 3.0

   "avc1.58A01E",  // H.264 Extended Profile Level 3.0

   "avc1.4D401E",  // H.264 Main Profile Level 3.0

   "avc1.64001E",  // H.264 High Profile Level 3.0

   "avc1.64001F",  // H.264 High Profile Level 3.1

   "mp4v.20.3",    // 3GPP

@@ -303,19 +290,19 @@

 #ifdef MOZ_DASH

   if (IsDASHMPDType(nsDependentCString(aMIMEType))) {

     // DASH manifest uses WebM codecs only.

     codecList = gWebMCodecs;

     result = CANPLAY_YES;

   }

 #endif

 #ifdef MOZ_GSTREAMER

-  if (IsH264Type(nsDependentCString(aMIMEType))) {

-    codecList = gH264Codecs;

-    result = CANPLAY_MAYBE;

+  if (GStreamerDecoder::CanHandleMediaType(nsDependentCString(aMIMEType),

+                                           aHaveRequestedCodecs ? &aRequestedCodecs : nullptr)) {

+    return CANPLAY_YES;

   }

 #endif

 #ifdef MOZ_WIDGET_GONK

   if (IsOmxSupportedType(nsDependentCString(aMIMEType))) {

     codecList = gH264Codecs;

     result = CANPLAY_MAYBE;

   }

 #endif

@@ -324,17 +311,17 @@

     result = CANPLAY_MAYBE;

   }

 #endif

 #ifdef MOZ_MEDIA_PLUGINS

   if (MediaDecoder::IsMediaPluginsEnabled() &&

       GetMediaPluginHost()->FindDecoder(nsDependentCString(aMIMEType), &codecList))

     result = CANPLAY_MAYBE;

 #endif

-  if (result == CANPLAY_NO || !aHaveRequestedCodecs) {

+  if (result == CANPLAY_NO || !aHaveRequestedCodecs || !codecList) {

     return result;

   }

   // See http://www.rfc-editor.org/rfc/rfc4281.txt for the description

   // of the 'codecs' parameter

   nsCharSeparatedTokenizer tokenizer(aRequestedCodecs, ',');

   bool expectMoreTokens = false;

   while (tokenizer.hasMoreTokens()) {

diff --git a/content/media/DecoderTraits.h b/content/media/DecoderTraits.h

--- a/content/media/DecoderTraits.h

+++ b/content/media/DecoderTraits.h

@@ -49,17 +49,16 @@

 #endif

 #ifdef MOZ_WEBM

   static bool IsWebMType(const nsACString& aType);

 #endif

 #ifdef MOZ_GSTREAMER

   static bool IsGStreamerSupportedType(const nsACString& aType);

-  static bool IsH264Type(const nsACString& aType);

 #endif

 #ifdef MOZ_WIDGET_GONK

   static bool IsOmxSupportedType(const nsACString& aType);

 #endif

 #ifdef MOZ_MEDIA_PLUGINS

   static bool IsMediaPluginsType(const nsACString& aType);

diff --git a/content/media/gstreamer/GStreamerDecoder.cpp b/content/media/gstreamer/GStreamerDecoder.cpp

--- a/content/media/gstreamer/GStreamerDecoder.cpp

+++ b/content/media/gstreamer/GStreamerDecoder.cpp

@@ -2,18 +2,26 @@

 /* vim:set ts=2 sw=2 sts=2 et cindent: */

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

  * You can obtain one at http://mozilla.org/MPL/2.0/. */

 #include "MediaDecoderStateMachine.h"

 #include "GStreamerReader.h"

 #include "GStreamerDecoder.h"

+#include "GStreamerFormatHelper.h"

 namespace mozilla {

 MediaDecoderStateMachine* GStreamerDecoder::CreateStateMachine()

 {

   return new MediaDecoderStateMachine(this, new GStreamerReader(this));

 }

+bool

+GStreamerDecoder::CanHandleMediaType(const nsACString& aMIMEType,

+                                     const nsAString* aCodecs)

+{

+  return GStreamerFormatHelper::Instance()->CanHandleMediaType(aMIMEType, aCodecs);

+}

+

 } // namespace mozilla

diff --git a/content/media/gstreamer/GStreamerDecoder.h b/content/media/gstreamer/GStreamerDecoder.h

--- a/content/media/gstreamer/GStreamerDecoder.h

+++ b/content/media/gstreamer/GStreamerDecoder.h

@@ -3,21 +3,23 @@

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

  * You can obtain one at http://mozilla.org/MPL/2.0/. */

 #if !defined(GStreamerDecoder_h_)

 #define GStreamerDecoder_h_

 #include "MediaDecoder.h"

+#include "nsXPCOMStrings.h"

 namespace mozilla {

 class GStreamerDecoder : public MediaDecoder

 {

 public:

   virtual MediaDecoder* Clone() { return new GStreamerDecoder(); }

   virtual MediaDecoderStateMachine* CreateStateMachine();

+  static bool CanHandleMediaType(const nsACString& aMIMEType, const nsAString* aCodecs);

 };

 } // namespace mozilla

 #endif

diff --git a/content/media/gstreamer/GStreamerFormatHelper.cpp b/content/media/gstreamer/GStreamerFormatHelper.cpp

new file mode 100644

--- /dev/null

+++ b/content/media/gstreamer/GStreamerFormatHelper.cpp

@@ -0,0 +1,159 @@

+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

+/* vim:set ts=2 sw=2 sts=2 et cindent: */

+/* This Source Code Form is subject to the terms of the Mozilla Public

+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,

+ * You can obtain one at http://mozilla.org/MPL/2.0/. */

+

+#include "GStreamerFormatHelper.h"

+#include "nsCharSeparatedTokenizer.h"

+#include "nsXPCOMStrings.h"

+

+#define ENTRY_FORMAT(entry) entry[0]

+#define ENTRY_CAPS(entry) entry[1]

+

+GStreamerFormatHelper* GStreamerFormatHelper::gInstance = nullptr;

+

+GStreamerFormatHelper* GStreamerFormatHelper::Instance() {

+  if (!gInstance) {

+    gst_init(nullptr, nullptr);

+    gInstance = new GStreamerFormatHelper();

+  }

+

+  return gInstance;

+}

+

+void GStreamerFormatHelper::Shutdown() {

+  if (gInstance) {

+    delete gInstance;

+    gInstance = nullptr;

+  }

+}

+

+char const *const GStreamerFormatHelper::mContainers[4][2] = {

+  {"video/mp4", "video/quicktime"},

+  {"video/quicktime", "video/quicktime"},

+  {"audio/mp4", "audio/mpeg, mpegversion=(int)4"},

+  {"audio/mpeg", "audio/mpeg, mpegversion=(int)1"},

+};

+

+char const *const GStreamerFormatHelper::mCodecs[8][2] = {

+  {"avc1.42E01E", "video/x-h264"},

+  {"avc1.42001E", "video/x-h264"},

+  {"avc1.58A01E", "video/x-h264"},

+  {"avc1.4D401E", "video/x-h264"},

+  {"avc1.64001E", "video/x-h264"},

+  {"avc1.64001F", "video/x-h264"},

+  {"mp4v.20.3", "video/3gpp"},

+  {"mp4a.40.2", "audio/mpeg, mpegversion=(int)4"},

+};

+

+GStreamerFormatHelper::GStreamerFormatHelper()

+  : mFactories(nullptr),

+    mCookie(static_cast<uint32_t>(-1))

+{

+}

+

+GStreamerFormatHelper::~GStreamerFormatHelper() {

+  if (mFactories)

+    g_list_free(mFactories);

+}

+

+bool GStreamerFormatHelper::CanHandleMediaType(const nsACString& aMIMEType,

+                                               const nsAString* aCodecs) {

+  const char *type;

+  NS_CStringGetData(aMIMEType, &type, NULL);

+

+  GstCaps* caps = ConvertFormatsToCaps(type, aCodecs);

+  if (!caps) {

+    return false;

+  }

+

+  bool ret = HaveElementsToProcessCaps(caps);

+  gst_caps_unref(caps);

+

+  return ret;

+}

+

+GstCaps* GStreamerFormatHelper::ConvertFormatsToCaps(const char* aMIMEType,

+                                                     const nsAString* aCodecs) {

+  unsigned int i;

+

+  /* convert aMIMEType to gst container caps */

+  const char* capsString = nullptr;

+  for (i = 0; i < G_N_ELEMENTS(mContainers); i++) {

+    if (!strcmp(ENTRY_FORMAT(mContainers[i]), aMIMEType)) {

+      capsString = ENTRY_CAPS(mContainers[i]);

+      break;

+    }

+  }

+

+  if (!capsString) {

+    /* we couldn't find any matching caps */

+    return nullptr;

+  }

+

+  GstCaps* caps = gst_caps_from_string(capsString);

+  /* container only */

+  if (!aCodecs) {

+    return caps;

+  }

+

+  nsCharSeparatedTokenizer tokenizer(*aCodecs, ',');

+  while (tokenizer.hasMoreTokens()) {

+    const nsSubstring& codec = tokenizer.nextToken();

+    capsString = nullptr;

+

+    for (i = 0; i < G_N_ELEMENTS(mCodecs); i++) {

+      if (codec.EqualsASCII(ENTRY_FORMAT(mCodecs[i]))) {

+        capsString = ENTRY_CAPS(mCodecs[i]);

+        break;

+      }

+    }

+

+    if (!capsString) {

+      gst_caps_unref(caps);

+      return nullptr;

+    }

+

+    GstCaps* tmp = gst_caps_from_string(capsString);

+    /* appends and frees tmp */

+    gst_caps_append(caps, tmp);

+  }

+

+  return caps;

+}

+

+bool GStreamerFormatHelper::HaveElementsToProcessCaps(GstCaps* aCaps) {

+

+  GList* factories = GetFactories();

+

+  GList* list;

+  /* here aCaps contains [containerCaps, [codecCaps1, [codecCaps2, ...]]] so process

+   * caps structures individually as we want one element for _each_

+   * structure */

+  for (unsigned int i = 0; i < gst_caps_get_size(aCaps); i++) {

+    GstStructure* s = gst_caps_get_structure(aCaps, i);

+    GstCaps* caps = gst_caps_new_full(gst_structure_copy(s), nullptr);

+    list = gst_element_factory_list_filter (factories, caps, GST_PAD_SINK, FALSE);

+    gst_caps_unref(caps);

+    if (!list) {

+      return false;

+    }

+    g_list_free(list);

+  }

+

+  return true;

+}

+

+GList* GStreamerFormatHelper::GetFactories() {

+  uint32_t cookie = gst_default_registry_get_feature_list_cookie ();

+  if (cookie != mCookie) {

+    g_list_free(mFactories);

+    mFactories = gst_element_factory_list_get_elements

+        (GST_ELEMENT_FACTORY_TYPE_DEMUXER | GST_ELEMENT_FACTORY_TYPE_DECODER,

+         GST_RANK_MARGINAL);

+    mCookie = cookie;

+  }

+

+  return mFactories;

+}

diff --git a/content/media/gstreamer/GStreamerFormatHelper.h b/content/media/gstreamer/GStreamerFormatHelper.h

new file mode 100644

--- /dev/null

+++ b/content/media/gstreamer/GStreamerFormatHelper.h

@@ -0,0 +1,60 @@

+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

+/* vim:set ts=2 sw=2 sts=2 et cindent: */

+/* This Source Code Form is subject to the terms of the Mozilla Public

+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,

+ * You can obtain one at http://mozilla.org/MPL/2.0/. */

+

+#if !defined(GStreamerFormatHelper_h_)

+#define GStreamerFormatHelper_h_

+

+#include <gst/gst.h>

+#include <mozilla/Types.h>

+#include "nsXPCOMStrings.h"

+

+class GStreamerFormatHelper {

+  /* This class can be used to query the GStreamer registry for the required

+   * demuxers/decoders from nsHTMLMediaElement::CanPlayType.

+   * It implements looking at the GstRegistry to check if elements to

+   * demux/decode the formats passed to CanPlayType() are actually installed.

+   */

+  public:

+    static GStreamerFormatHelper* Instance();

+    ~GStreamerFormatHelper();

+

+    bool CanHandleMediaType(const nsACString& aMIMEType,

+                            const nsAString* aCodecs);

+

+   static void Shutdown();

+

+  private:

+    GStreamerFormatHelper();

+    GstCaps* ConvertFormatsToCaps(const char* aMIMEType,

+                                  const nsAString* aCodecs);

+    char* const *CodecListFromCaps(GstCaps* aCaps);

+    bool HaveElementsToProcessCaps(GstCaps* aCaps);

+    GList* GetFactories();

+

+    static GStreamerFormatHelper* gInstance;

+

+    /* table to convert from container MIME types to GStreamer elements */

+    static char const *const mContainers[4][2];

+

+    /* table to convert from codec MIME types to GStreamer elements */

+    static char const *const mCodecs[8][2];

+

+    /* list of GStreamer element factories

+     * Element factories are the basic types retrieved from the GStreamer

+     * registry, they describe all plugins and elements that GStreamer can

+     * create.

+     * This means that element factories are useful for automated element

+     * instancing, such as what autopluggers do,

+     * and for creating lists of available elements. */

+    GList* mFactories;

+

+    /* Storage for the default registrys feature list cookie.

+     * It changes every time a feature is added to or removed from the

+     * GStreamer registry. */

+    uint32_t mCookie;

+};

+

+#endif

diff --git a/content/media/gstreamer/Makefile.in b/content/media/gstreamer/Makefile.in

--- a/content/media/gstreamer/Makefile.in

+++ b/content/media/gstreamer/Makefile.in

@@ -13,21 +13,23 @@

 MODULE		= content

 LIBRARY_NAME	= gkcongstreamer_s

 LIBXUL_LIBRARY 	= 1

 EXPORTS		+= \

 		GStreamerDecoder.h \

 		GStreamerReader.h \

+		GStreamerFormatHelper.h \

 		$(NULL)

 CPPSRCS		= \

 		GStreamerReader.cpp \

 		GStreamerDecoder.cpp \

+		GStreamerFormatHelper.cpp \

 		$(NULL)

 FORCE_STATIC_LIB = 1

 include $(topsrcdir)/config/rules.mk

 CFLAGS		+= $(GSTREAMER_CFLAGS)

 CXXFLAGS	+= $(GSTREAMER_CFLAGS)

diff --git a/layout/build/Makefile.in b/layout/build/Makefile.in

--- a/layout/build/Makefile.in

+++ b/layout/build/Makefile.in

@@ -316,16 +316,20 @@

 		   -I$(topsrcdir)/js/xpconnect/loader \

 		   -I$(topsrcdir)/caps/include \

 		   -I$(topsrcdir)/netwerk/base/src \

 		   -I$(topsrcdir)/content/svg/content/src \

 		   -I$(topsrcdir)/extensions/cookie \

 		   -I$(topsrcdir)/netwerk/cookie \

 		   $(NULL)

+ifdef MOZ_GSTREAMER

+LOCAL_INCLUDES	+= $(GSTREAMER_CFLAGS)

+endif

+

 ifdef MOZ_B2G_RIL #{

 LOCAL_INCLUDES	+= -I$(topsrcdir)/dom/system/gonk

 endif #}

 ifdef MOZ_B2G_FM #{

 LOCAL_INCLUDES	+= -I$(topsrcdir)/dom/fm

 endif #}