Title: [268576] trunk
Revision
268576
Author
[email protected]
Date
2020-10-16 01:52:38 -0700 (Fri, 16 Oct 2020)

Log Message

[GStreamer] Encoder probing support for the registry scanner
https://bugs.webkit.org/show_bug.cgi?id=217750

Reviewed by Xabier Rodriguez-Calvar.

Source/WebCore:

The scanner is now able to probe for platform encoders for the most common formats: avc1,
av1, ogg, theora, aac and opus. The muxers for webm and mp4 are also checked.

No new tests, existing mediacapabilities test cover this change.

* platform/graphics/gstreamer/GStreamerRegistryScanner.cpp:
(WebCore::GStreamerRegistryScanner::GStreamerRegistryScanner):
(WebCore::GStreamerRegistryScanner::~GStreamerRegistryScanner):
(WebCore::GStreamerRegistryScanner::mimeTypeSet):
(WebCore::GStreamerRegistryScanner::isContainerTypeSupported const):
(WebCore::GStreamerRegistryScanner::hasElementForMediaType const):
(WebCore::GStreamerRegistryScanner::fillMimeTypeSetFromCapsMapping):
(WebCore::GStreamerRegistryScanner::initializeDecoders):
(WebCore::GStreamerRegistryScanner::initializeEncoders):
(WebCore::GStreamerRegistryScanner::isCodecSupported const):
(WebCore::GStreamerRegistryScanner::isContentTypeSupported const):
(WebCore::GStreamerRegistryScanner::areAllCodecsSupported const):
(WebCore::GStreamerRegistryScanner::isAVC1CodecSupported const):
(WebCore::GStreamerRegistryScanner::configurationNameForLogging const):
(WebCore::GStreamerRegistryScanner::isConfigurationSupported const):
* platform/graphics/gstreamer/GStreamerRegistryScanner.h:
(WebCore::GStreamerRegistryScanner::isDecodingSupported const):
(WebCore::GStreamerRegistryScanner::isEncodingSupported const):
* platform/graphics/gstreamer/ImageDecoderGStreamer.cpp:
(WebCore::ImageDecoderGStreamer::supportsContainerType):
(WebCore::ImageDecoderGStreamer::canDecodeType):
* platform/graphics/gstreamer/MediaEngineConfigurationFactoryGStreamer.cpp:
(WebCore::createMediaPlayerEncodingConfigurationGStreamer):
* platform/graphics/gstreamer/MediaEngineConfigurationFactoryGStreamer.h:
* platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp:
(WebCore::MediaPlayerPrivateGStreamer::getSupportedTypes):
(WebCore::MediaPlayerPrivateGStreamer::supportsType):
* platform/graphics/gstreamer/mse/AppendPipeline.cpp:
(WebCore::AppendPipeline::parseDemuxerSrcPadCaps):
* platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp:
(WebCore::MediaPlayerPrivateGStreamerMSE::getSupportedTypes):
(WebCore::MediaPlayerPrivateGStreamerMSE::supportsType):
* platform/mediacapabilities/MediaEngineConfigurationFactory.cpp:
(WebCore::factories):

LayoutTests:

* platform/glib/media/mediacapabilities-types-expected.txt: Renamed from LayoutTests/platform/gtk/media/mediacapabilities/mediacapabilities-types-expected.txt.

Modified Paths

Added Paths

Removed Paths

Diff

Modified: trunk/LayoutTests/ChangeLog (268575 => 268576)


--- trunk/LayoutTests/ChangeLog	2020-10-16 07:52:45 UTC (rev 268575)
+++ trunk/LayoutTests/ChangeLog	2020-10-16 08:52:38 UTC (rev 268576)
@@ -1,3 +1,12 @@
+2020-10-16  Philippe Normand  <[email protected]>
+
+        [GStreamer] Encoder probing support for the registry scanner
+        https://bugs.webkit.org/show_bug.cgi?id=217750
+
+        Reviewed by Xabier Rodriguez-Calvar.
+
+        * platform/glib/media/mediacapabilities-types-expected.txt: Renamed from LayoutTests/platform/gtk/media/mediacapabilities/mediacapabilities-types-expected.txt.
+
 2020-10-16  Diego Pino Garcia  <[email protected]>
 
         [GLIB][GTK] Unreviewed test gardening. Update test expectations after r268573.

Copied: trunk/LayoutTests/platform/glib/media/mediacapabilities-types-expected.txt (from rev 268575, trunk/LayoutTests/platform/gtk/media/mediacapabilities/mediacapabilities-types-expected.txt) (0 => 268576)


--- trunk/LayoutTests/platform/glib/media/mediacapabilities-types-expected.txt	                        (rev 0)
+++ trunk/LayoutTests/platform/glib/media/mediacapabilities-types-expected.txt	2020-10-16 08:52:38 UTC (rev 268576)
@@ -0,0 +1,87 @@
+Test basic dictionary and enum types of Media Capabilities API
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'file' });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'media-source' });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'file', audio: { } });
+    } rejected promise  with TypeError: Member AudioConfiguration.contentType is required and must be an instance of DOMString.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'file', audio: { contentType: 'video/mp4; codecs="avc1"' } });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { } });
+    } rejected promise  with TypeError: Member VideoConfiguration.bitrate is required and must be an instance of unsigned long long.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'audio/mp3', width: 640, height: 480, bitrate: 1000, framerate: 24 } });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'video/mp4; codecs="avc1"', height: 480, bitrate: 1000, framerate: 24 } });
+    } rejected promise  with TypeError: Member VideoConfiguration.width is required and must be an instance of unsigned long.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'video/mp4; codecs="avc1,vp9"', width:640, height: 480, bitrate: 1000, framerate: 24 } });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'video/mp4', width:640, height: 480, bitrate: 1000, framerate: 24 } });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: 0 } });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: "24/a" } });
+    } rejected promise  with TypeError: The provided value is non-finite.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: "24/0" } });
+    } rejected promise  with TypeError: The provided value is non-finite.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'invalid', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: 24 } });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.encodingInfo({ type: 'record' });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.encodingInfo({ type: 'record', audio: { } });
+    } rejected promise  with TypeError: Member AudioConfiguration.contentType is required and must be an instance of DOMString.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'record', audio: { } });
+    } rejected promise  with TypeError: Member AudioConfiguration.contentType is required and must be an instance of DOMString.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'record', audio: { contentType: 'video/mp4; codecs="avc1"' } });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { } });
+    } rejected promise  with TypeError: Member VideoConfiguration.bitrate is required and must be an instance of unsigned long long.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'audio/mp3', width: 640, height: 480, bitrate: 1000, framerate: 24 } });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'video/mp4; codecs="avc1"', height: 480, bitrate: 1000, framerate: 24 } });
+    } rejected promise  with TypeError: Member VideoConfiguration.width is required and must be an instance of unsigned long.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'video/mp4; codecs="avc1,vp9"', width:640, height: 480, bitrate: 1000, framerate: 24 } });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'video/mp4', width:640, height: 480, bitrate: 1000, framerate: 24 } });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: 0 } });
+    } rejected promise  with TypeError: Type error.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: "24/a" } });
+    } rejected promise  with TypeError: The provided value is non-finite.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: "24/-1" } });
+    } rejected promise  with TypeError: The provided value is non-finite.
+PASS () => {
+        return navigator.mediaCapabilities.decodingInfo({ type: 'invalid', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: 24 } });
+    } rejected promise  with TypeError: Type error.
+PASS successfullyParsed is true
+
+TEST COMPLETE
+

Deleted: trunk/LayoutTests/platform/gtk/media/mediacapabilities/mediacapabilities-types-expected.txt (268575 => 268576)


--- trunk/LayoutTests/platform/gtk/media/mediacapabilities/mediacapabilities-types-expected.txt	2020-10-16 07:52:45 UTC (rev 268575)
+++ trunk/LayoutTests/platform/gtk/media/mediacapabilities/mediacapabilities-types-expected.txt	2020-10-16 08:52:38 UTC (rev 268576)
@@ -1,87 +0,0 @@
-Test basic dictionary and enum types of Media Capabilities API
-
-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
-
-
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'file' });
-    } rejected promise  with TypeError: Type error.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'media-source' });
-    } rejected promise  with TypeError: Type error.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'file', audio: { } });
-    } rejected promise  with TypeError: Member AudioConfiguration.contentType is required and must be an instance of DOMString.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'file', audio: { contentType: 'video/mp4; codecs="avc1"' } });
-    } rejected promise  with TypeError: Type error.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { } });
-    } rejected promise  with TypeError: Member VideoConfiguration.bitrate is required and must be an instance of unsigned long long.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'audio/mp3', width: 640, height: 480, bitrate: 1000, framerate: 24 } });
-    } rejected promise  with TypeError: Type error.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'video/mp4; codecs="avc1"', height: 480, bitrate: 1000, framerate: 24 } });
-    } rejected promise  with TypeError: Member VideoConfiguration.width is required and must be an instance of unsigned long.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'video/mp4; codecs="avc1,vp9"', width:640, height: 480, bitrate: 1000, framerate: 24 } });
-    } rejected promise  with TypeError: Type error.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'video/mp4', width:640, height: 480, bitrate: 1000, framerate: 24 } });
-    } rejected promise  with TypeError: Type error.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: 0 } });
-    } rejected promise  with TypeError: Type error.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: "24/a" } });
-    } rejected promise  with TypeError: The provided value is non-finite.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'file', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: "24/0" } });
-    } rejected promise  with TypeError: The provided value is non-finite.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'invalid', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: 24 } });
-    } rejected promise  with TypeError: Type error.
-FAIL () => {
-        return navigator.mediaCapabilities.encodingInfo({ type: 'record' });
-    } should not throw exception. Threw exception TypeError: navigator.mediaCapabilities.encodingInfo is not a function. (In 'navigator.mediaCapabilities.encodingInfo({ type: 'record' })', 'navigator.mediaCapabilities.encodingInfo' is undefined).
-FAIL () => {
-        return navigator.mediaCapabilities.encodingInfo({ type: 'record', audio: { } });
-    } should not throw exception. Threw exception TypeError: navigator.mediaCapabilities.encodingInfo is not a function. (In 'navigator.mediaCapabilities.encodingInfo({ type: 'record', audio: { } })', 'navigator.mediaCapabilities.encodingInfo' is undefined).
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'record', audio: { } });
-    } rejected promise  with TypeError: Member AudioConfiguration.contentType is required and must be an instance of DOMString.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'record', audio: { contentType: 'video/mp4; codecs="avc1"' } });
-    } rejected promise  with TypeError: Type error.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { } });
-    } rejected promise  with TypeError: Member VideoConfiguration.bitrate is required and must be an instance of unsigned long long.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'audio/mp3', width: 640, height: 480, bitrate: 1000, framerate: 24 } });
-    } rejected promise  with TypeError: Type error.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'video/mp4; codecs="avc1"', height: 480, bitrate: 1000, framerate: 24 } });
-    } rejected promise  with TypeError: Member VideoConfiguration.width is required and must be an instance of unsigned long.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'video/mp4; codecs="avc1,vp9"', width:640, height: 480, bitrate: 1000, framerate: 24 } });
-    } rejected promise  with TypeError: Type error.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'video/mp4', width:640, height: 480, bitrate: 1000, framerate: 24 } });
-    } rejected promise  with TypeError: Type error.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: 0 } });
-    } rejected promise  with TypeError: Type error.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: "24/a" } });
-    } rejected promise  with TypeError: The provided value is non-finite.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'record', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: "24/-1" } });
-    } rejected promise  with TypeError: The provided value is non-finite.
-PASS () => {
-        return navigator.mediaCapabilities.decodingInfo({ type: 'invalid', video: { contentType: 'video/mp4; codecs="avc1"', width: 640, height: 480, bitrate: 1000, framerate: 24 } });
-    } rejected promise  with TypeError: Type error.
-PASS successfullyParsed is true
-
-TEST COMPLETE
-

Modified: trunk/Source/WebCore/ChangeLog (268575 => 268576)


--- trunk/Source/WebCore/ChangeLog	2020-10-16 07:52:45 UTC (rev 268575)
+++ trunk/Source/WebCore/ChangeLog	2020-10-16 08:52:38 UTC (rev 268576)
@@ -1,3 +1,50 @@
+2020-10-16  Philippe Normand  <[email protected]>
+
+        [GStreamer] Encoder probing support for the registry scanner
+        https://bugs.webkit.org/show_bug.cgi?id=217750
+
+        Reviewed by Xabier Rodriguez-Calvar.
+
+        The scanner is now able to probe for platform encoders for the most common formats: avc1,
+        av1, ogg, theora, aac and opus. The muxers for webm and mp4 are also checked.
+
+        No new tests, existing mediacapabilities test cover this change.
+
+        * platform/graphics/gstreamer/GStreamerRegistryScanner.cpp:
+        (WebCore::GStreamerRegistryScanner::GStreamerRegistryScanner):
+        (WebCore::GStreamerRegistryScanner::~GStreamerRegistryScanner):
+        (WebCore::GStreamerRegistryScanner::mimeTypeSet):
+        (WebCore::GStreamerRegistryScanner::isContainerTypeSupported const):
+        (WebCore::GStreamerRegistryScanner::hasElementForMediaType const):
+        (WebCore::GStreamerRegistryScanner::fillMimeTypeSetFromCapsMapping):
+        (WebCore::GStreamerRegistryScanner::initializeDecoders):
+        (WebCore::GStreamerRegistryScanner::initializeEncoders):
+        (WebCore::GStreamerRegistryScanner::isCodecSupported const):
+        (WebCore::GStreamerRegistryScanner::isContentTypeSupported const):
+        (WebCore::GStreamerRegistryScanner::areAllCodecsSupported const):
+        (WebCore::GStreamerRegistryScanner::isAVC1CodecSupported const):
+        (WebCore::GStreamerRegistryScanner::configurationNameForLogging const):
+        (WebCore::GStreamerRegistryScanner::isConfigurationSupported const):
+        * platform/graphics/gstreamer/GStreamerRegistryScanner.h:
+        (WebCore::GStreamerRegistryScanner::isDecodingSupported const):
+        (WebCore::GStreamerRegistryScanner::isEncodingSupported const):
+        * platform/graphics/gstreamer/ImageDecoderGStreamer.cpp:
+        (WebCore::ImageDecoderGStreamer::supportsContainerType):
+        (WebCore::ImageDecoderGStreamer::canDecodeType):
+        * platform/graphics/gstreamer/MediaEngineConfigurationFactoryGStreamer.cpp:
+        (WebCore::createMediaPlayerEncodingConfigurationGStreamer):
+        * platform/graphics/gstreamer/MediaEngineConfigurationFactoryGStreamer.h:
+        * platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp:
+        (WebCore::MediaPlayerPrivateGStreamer::getSupportedTypes):
+        (WebCore::MediaPlayerPrivateGStreamer::supportsType):
+        * platform/graphics/gstreamer/mse/AppendPipeline.cpp:
+        (WebCore::AppendPipeline::parseDemuxerSrcPadCaps):
+        * platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp:
+        (WebCore::MediaPlayerPrivateGStreamerMSE::getSupportedTypes):
+        (WebCore::MediaPlayerPrivateGStreamerMSE::supportsType):
+        * platform/mediacapabilities/MediaEngineConfigurationFactory.cpp:
+        (WebCore::factories):
+
 2020-10-15  Keith Rollin  <[email protected]>
 
         Lessen the reliance on VPATH in WebCore/DerivedSources.make

Modified: trunk/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.cpp (268575 => 268576)


--- trunk/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.cpp	2020-10-16 07:52:45 UTC (rev 268575)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.cpp	2020-10-16 08:52:38 UTC (rev 268576)
@@ -26,6 +26,7 @@
 #include <fnmatch.h>
 #include <gst/pbutils/codec-utils.h>
 #include <wtf/PrintStream.h>
+#include <wtf/WeakPtr.h>
 
 namespace WebCore {
 
@@ -48,13 +49,22 @@
     m_videoParserFactories = gst_element_factory_list_get_elements(GST_ELEMENT_FACTORY_TYPE_PARSER | GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO, GST_RANK_MARGINAL);
     m_demuxerFactories = gst_element_factory_list_get_elements(GST_ELEMENT_FACTORY_TYPE_DEMUXER, GST_RANK_MARGINAL);
 
-    initialize();
+    m_audioEncoderFactories = gst_element_factory_list_get_elements(GST_ELEMENT_FACTORY_TYPE_ENCODER | GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO, GST_RANK_MARGINAL);
+    m_videoEncoderFactories = gst_element_factory_list_get_elements(GST_ELEMENT_FACTORY_TYPE_ENCODER | GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO, GST_RANK_MARGINAL);
+    m_muxerFactories = gst_element_factory_list_get_elements(GST_ELEMENT_FACTORY_TYPE_MUXER, GST_RANK_MARGINAL);
+
+    initializeDecoders();
+    initializeEncoders();
 #ifndef GST_DISABLE_GST_DEBUG
     GST_DEBUG("%s registry scanner initialized", m_isMediaSource ? "MSE" : "Regular playback");
-    for (auto& mimeType : m_mimeTypeSet)
-        GST_DEBUG("Mime-type registered: %s", mimeType.utf8().data());
-    for (auto& item : m_codecMap)
-        GST_DEBUG("%s codec pattern registered: %s", item.value ? "Hardware" : "Software", item.key.string().utf8().data());
+    for (auto& mimeType : m_decoderMimeTypeSet)
+        GST_DEBUG("Decoder mime-type registered: %s", mimeType.utf8().data());
+    for (auto& item : m_decoderCodecMap)
+        GST_DEBUG("%s decoder codec pattern registered: %s", item.value ? "Hardware" : "Software", item.key.string().utf8().data());
+    for (auto& mimeType : m_encoderMimeTypeSet)
+        GST_DEBUG("Encoder mime-type registered: %s", mimeType.utf8().data());
+    for (auto& item : m_encoderCodecMap)
+        GST_DEBUG("%s encoder codec pattern registered: %s", item.value ? "Hardware" : "Software", item.key.string().utf8().data());
 #endif
 }
 
@@ -65,15 +75,65 @@
     gst_plugin_feature_list_free(m_videoDecoderFactories);
     gst_plugin_feature_list_free(m_videoParserFactories);
     gst_plugin_feature_list_free(m_demuxerFactories);
+    gst_plugin_feature_list_free(m_audioEncoderFactories);
+    gst_plugin_feature_list_free(m_videoEncoderFactories);
+    gst_plugin_feature_list_free(m_muxerFactories);
 }
 
+const HashSet<String, ASCIICaseInsensitiveHash>& GStreamerRegistryScanner::mimeTypeSet(Configuration configuration)
+{
+    switch (configuration) {
+    case Configuration::Decoding:
+        return m_decoderMimeTypeSet;
+    case Configuration::Encoding:
+        return m_encoderMimeTypeSet;
+    }
+    ASSERT_NOT_REACHED();
+    return m_decoderMimeTypeSet;
+}
+
+bool GStreamerRegistryScanner::isContainerTypeSupported(Configuration configuration, String containerType) const
+{
+    switch (configuration) {
+    case Configuration::Decoding:
+        return m_decoderMimeTypeSet.contains(containerType);
+    case Configuration::Encoding:
+        return m_encoderMimeTypeSet.contains(containerType);
+    }
+    ASSERT_NOT_REACHED();
+    return false;
+}
+
 GStreamerRegistryScanner::RegistryLookupResult GStreamerRegistryScanner::hasElementForMediaType(GList* elementFactories, const char* capsString, bool shouldCheckHardwareClassifier, Optional<Vector<String>> blackList) const
 {
+    GstPadDirection padDirection = GST_PAD_SINK;
+    if (elementFactories == m_audioEncoderFactories || elementFactories == m_videoEncoderFactories || elementFactories == m_muxerFactories)
+        padDirection = GST_PAD_SRC;
     GRefPtr<GstCaps> caps = adoptGRef(gst_caps_from_string(capsString));
-    GList* candidates = gst_element_factory_list_filter(elementFactories, caps.get(), GST_PAD_SINK, false);
+    GList* candidates = gst_element_factory_list_filter(elementFactories, caps.get(), padDirection, false);
     bool isSupported = candidates;
     bool isUsingHardware = false;
 
+    const char* elementType = "";
+    if (elementFactories == m_audioParserFactories)
+        elementType = "audio parser";
+    else if (elementFactories == m_audioDecoderFactories)
+        elementType = "audio decoder";
+    else if (elementFactories == m_videoParserFactories)
+        elementType = "video parser";
+    else if (elementFactories == m_videoDecoderFactories)
+        elementType = "video decoder";
+    else if (elementFactories == m_demuxerFactories)
+        elementType = "demuxer";
+    else if (elementFactories == m_audioEncoderFactories)
+        elementType = "audio encoder";
+    else if (elementFactories == m_videoEncoderFactories)
+        elementType = "video encoder";
+    else if (elementFactories == m_muxerFactories)
+        elementType = "muxer";
+    else
+        ASSERT_NOT_REACHED();
+
     if (blackList.hasValue() && !blackList->isEmpty()) {
         bool hasValidCandidate = false;
         for (GList* factories = candidates; factories; factories = g_list_next(factories)) {
@@ -84,7 +144,7 @@
             break;
         }
         if (!hasValidCandidate) {
-            GST_WARNING("All elements for caps %" GST_PTR_FORMAT " are blacklisted", caps.get());
+            GST_WARNING("All %s elements matching caps %" GST_PTR_FORMAT " are blacklisted", elementType, caps.get());
             isSupported = false;
             shouldCheckHardwareClassifier = false;
         }
@@ -103,22 +163,7 @@
     }
 
     gst_plugin_feature_list_free(candidates);
-#ifndef GST_DISABLE_GST_DEBUG
-    const char* elementType = "";
-    if (elementFactories == m_audioParserFactories)
-        elementType = "Audio parser";
-    else if (elementFactories == m_audioDecoderFactories)
-        elementType = "Audio decoder";
-    else if (elementFactories == m_videoParserFactories)
-        elementType = "Video parser";
-    else if (elementFactories == m_videoDecoderFactories)
-        elementType = "Video decoder";
-    else if (elementFactories == m_demuxerFactories)
-        elementType = "Demuxer";
-    else
-        ASSERT_NOT_REACHED();
-    GST_LOG("%s lookup result for caps %" GST_PTR_FORMAT " : isSupported=%s, isUsingHardware=%s", elementType, caps.get(), boolForPrinting(isSupported), boolForPrinting(isUsingHardware));
-#endif
+    GST_LOG("Lookup result for %s matching caps %" GST_PTR_FORMAT " : isSupported=%s, isUsingHardware=%s", elementType, caps.get(), boolForPrinting(isSupported), boolForPrinting(isUsingHardware));
     return GStreamerRegistryScanner::RegistryLookupResult { isSupported, isUsingHardware };
 }
 
@@ -126,53 +171,76 @@
 {
     for (auto& current : mapping) {
         GList* factories;
+        HashSet<String, ASCIICaseInsensitiveHash> mimeTypeSet;
+        HashMap<AtomString, bool> codecMap;
         switch (current.elementType) {
         case Demuxer:
             factories = m_demuxerFactories;
+            codecMap = m_decoderCodecMap;
+            mimeTypeSet = m_decoderMimeTypeSet;
             break;
         case AudioDecoder:
             factories = m_audioDecoderFactories;
+            codecMap = m_decoderCodecMap;
+            mimeTypeSet = m_decoderMimeTypeSet;
             break;
         case VideoDecoder:
             factories = m_videoDecoderFactories;
+            codecMap = m_decoderCodecMap;
+            mimeTypeSet = m_decoderMimeTypeSet;
             break;
+        case Muxer:
+            factories = m_muxerFactories;
+            codecMap = m_encoderCodecMap;
+            mimeTypeSet = m_encoderMimeTypeSet;
+            break;
+        case AudioEncoder:
+            factories = m_audioEncoderFactories;
+            codecMap = m_encoderCodecMap;
+            mimeTypeSet = m_encoderMimeTypeSet;
+            break;
+        case VideoEncoder:
+            factories = m_videoEncoderFactories;
+            codecMap = m_encoderCodecMap;
+            mimeTypeSet = m_encoderMimeTypeSet;
+            break;
         }
 
         if (hasElementForMediaType(factories, current.capsString)) {
             if (!current.webkitCodecPatterns.isEmpty()) {
                 for (const auto& pattern : current.webkitCodecPatterns)
-                    m_codecMap.add(pattern, false);
+                    codecMap.add(pattern, false);
             }
             if (!current.webkitMimeTypes.isEmpty()) {
                 for (const auto& mimeType : current.webkitMimeTypes)
-                    m_mimeTypeSet.add(mimeType);
+                    mimeTypeSet.add(mimeType);
             } else
-                m_mimeTypeSet.add(AtomString(current.capsString));
+                mimeTypeSet.add(AtomString(current.capsString));
         }
     }
 }
 
-void GStreamerRegistryScanner::initialize()
+void GStreamerRegistryScanner::initializeDecoders()
 {
     if (hasElementForMediaType(m_audioDecoderFactories, "audio/mpeg, mpegversion=(int)4")) {
-        m_mimeTypeSet.add(AtomString("audio/aac"));
-        m_mimeTypeSet.add(AtomString("audio/mp4"));
-        m_mimeTypeSet.add(AtomString("audio/x-m4a"));
-        m_codecMap.add(AtomString("mpeg"), false);
-        m_codecMap.add(AtomString("mp4a*"), false);
+        m_decoderMimeTypeSet.add(AtomString("audio/aac"));
+        m_decoderMimeTypeSet.add(AtomString("audio/mp4"));
+        m_decoderMimeTypeSet.add(AtomString("audio/x-m4a"));
+        m_decoderCodecMap.add(AtomString("mpeg"), false);
+        m_decoderCodecMap.add(AtomString("mp4a*"), false);
     }
 
     auto opusSupported = hasElementForMediaType(m_audioDecoderFactories, "audio/x-opus");
     if (opusSupported && (!m_isMediaSource || hasElementForMediaType(m_audioParserFactories, "audio/x-opus"))) {
-        m_mimeTypeSet.add(AtomString("audio/opus"));
-        m_codecMap.add(AtomString("opus"), false);
-        m_codecMap.add(AtomString("x-opus"), false);
+        m_decoderMimeTypeSet.add(AtomString("audio/opus"));
+        m_decoderCodecMap.add(AtomString("opus"), false);
+        m_decoderCodecMap.add(AtomString("x-opus"), false);
     }
 
     auto vorbisSupported = hasElementForMediaType(m_audioDecoderFactories, "audio/x-vorbis");
     if (vorbisSupported && (!m_isMediaSource || hasElementForMediaType(m_audioParserFactories, "audio/x-vorbis"))) {
-        m_codecMap.add(AtomString("vorbis"), false);
-        m_codecMap.add(AtomString("x-vorbis"), false);
+        m_decoderCodecMap.add(AtomString("vorbis"), false);
+        m_decoderCodecMap.add(AtomString("x-vorbis"), false);
     }
 
     bool matroskaSupported = hasElementForMediaType(m_demuxerFactories, "video/x-matroska");
@@ -181,37 +249,37 @@
         auto vp9DecoderAvailable = hasElementForMediaType(m_videoDecoderFactories, "video/x-vp9", true);
 
         if (vp8DecoderAvailable || vp9DecoderAvailable)
-            m_mimeTypeSet.add(AtomString("video/webm"));
+            m_decoderMimeTypeSet.add(AtomString("video/webm"));
 
         if (vp8DecoderAvailable) {
-            m_codecMap.add(AtomString("vp8"), vp8DecoderAvailable.isUsingHardware);
-            m_codecMap.add(AtomString("x-vp8"), vp8DecoderAvailable.isUsingHardware);
-            m_codecMap.add(AtomString("vp8.0"), vp8DecoderAvailable.isUsingHardware);
+            m_decoderCodecMap.add(AtomString("vp8"), vp8DecoderAvailable.isUsingHardware);
+            m_decoderCodecMap.add(AtomString("x-vp8"), vp8DecoderAvailable.isUsingHardware);
+            m_decoderCodecMap.add(AtomString("vp8.0"), vp8DecoderAvailable.isUsingHardware);
         }
         if (vp9DecoderAvailable) {
-            m_codecMap.add(AtomString("vp9"), vp9DecoderAvailable.isUsingHardware);
-            m_codecMap.add(AtomString("x-vp9"), vp9DecoderAvailable.isUsingHardware);
-            m_codecMap.add(AtomString("vp9.0"), vp9DecoderAvailable.isUsingHardware);
-            m_codecMap.add(AtomString("vp09*"), vp9DecoderAvailable.isUsingHardware);
+            m_decoderCodecMap.add(AtomString("vp9"), vp9DecoderAvailable.isUsingHardware);
+            m_decoderCodecMap.add(AtomString("x-vp9"), vp9DecoderAvailable.isUsingHardware);
+            m_decoderCodecMap.add(AtomString("vp9.0"), vp9DecoderAvailable.isUsingHardware);
+            m_decoderCodecMap.add(AtomString("vp09*"), vp9DecoderAvailable.isUsingHardware);
         }
         if (opusSupported)
-            m_mimeTypeSet.add(AtomString("audio/webm"));
+            m_decoderMimeTypeSet.add(AtomString("audio/webm"));
     }
 
     auto h264DecoderAvailable = hasElementForMediaType(m_videoDecoderFactories, "video/x-h264, profile="" constrained-baseline, baseline, high }", true);
     if (h264DecoderAvailable && (!m_isMediaSource || hasElementForMediaType(m_videoParserFactories, "video/x-h264"))) {
-        m_mimeTypeSet.add(AtomString("video/mp4"));
-        m_mimeTypeSet.add(AtomString("video/x-m4v"));
-        m_codecMap.add(AtomString("x-h264"), h264DecoderAvailable.isUsingHardware);
-        m_codecMap.add(AtomString("avc*"), h264DecoderAvailable.isUsingHardware);
-        m_codecMap.add(AtomString("mp4v*"), h264DecoderAvailable.isUsingHardware);
+        m_decoderMimeTypeSet.add(AtomString("video/mp4"));
+        m_decoderMimeTypeSet.add(AtomString("video/x-m4v"));
+        m_decoderCodecMap.add(AtomString("x-h264"), h264DecoderAvailable.isUsingHardware);
+        m_decoderCodecMap.add(AtomString("avc*"), h264DecoderAvailable.isUsingHardware);
+        m_decoderCodecMap.add(AtomString("mp4v*"), h264DecoderAvailable.isUsingHardware);
     }
 
     Vector<String> av1DecodersBlacklist { "av1dec"_s };
-    if ((matroskaSupported || isContainerTypeSupported("video/mp4")) && hasElementForMediaType(m_videoDecoderFactories, "video/x-av1", false, makeOptional(WTFMove(av1DecodersBlacklist)))) {
-        m_codecMap.add(AtomString("av01*"), false);
-        m_codecMap.add(AtomString("av1"), false);
-        m_codecMap.add(AtomString("x-av1"), false);
+    if ((matroskaSupported || isContainerTypeSupported(Configuration::Decoding, "video/mp4")) && hasElementForMediaType(m_videoDecoderFactories, "video/x-av1", false, makeOptional(WTFMove(av1DecodersBlacklist)))) {
+        m_decoderCodecMap.add(AtomString("av01*"), false);
+        m_decoderCodecMap.add(AtomString("av1"), false);
+        m_decoderCodecMap.add(AtomString("x-av1"), false);
     }
 
     if (m_isMediaSource)
@@ -248,21 +316,21 @@
     fillMimeTypeSetFromCapsMapping(mapping);
 
     if (hasElementForMediaType(m_demuxerFactories, "application/ogg")) {
-        m_mimeTypeSet.add(AtomString("application/ogg"));
+        m_decoderMimeTypeSet.add(AtomString("application/ogg"));
 
         if (vorbisSupported) {
-            m_mimeTypeSet.add(AtomString("audio/ogg"));
-            m_mimeTypeSet.add(AtomString("audio/x-vorbis+ogg"));
+            m_decoderMimeTypeSet.add(AtomString("audio/ogg"));
+            m_decoderMimeTypeSet.add(AtomString("audio/x-vorbis+ogg"));
         }
 
         if (hasElementForMediaType(m_audioDecoderFactories, "audio/x-speex")) {
-            m_mimeTypeSet.add(AtomString("audio/ogg"));
-            m_codecMap.add(AtomString("speex"), false);
+            m_decoderMimeTypeSet.add(AtomString("audio/ogg"));
+            m_decoderCodecMap.add(AtomString("speex"), false);
         }
 
         if (hasElementForMediaType(m_videoDecoderFactories, "video/x-theora")) {
-            m_mimeTypeSet.add(AtomString("video/ogg"));
-            m_codecMap.add(AtomString("theora"), false);
+            m_decoderMimeTypeSet.add(AtomString("video/ogg"));
+            m_decoderCodecMap.add(AtomString("theora"), false);
         }
     }
 
@@ -269,34 +337,115 @@
     bool audioMpegSupported = false;
     if (hasElementForMediaType(m_audioDecoderFactories, "audio/mpeg, mpegversion=(int)1, layer=(int)[1, 3]")) {
         audioMpegSupported = true;
-        m_mimeTypeSet.add(AtomString("audio/mp1"));
-        m_mimeTypeSet.add(AtomString("audio/mp3"));
-        m_mimeTypeSet.add(AtomString("audio/x-mp3"));
-        m_codecMap.add(AtomString("audio/mp3"), false);
-        m_codecMap.add(AtomString("mp3"), false);
+        m_decoderMimeTypeSet.add(AtomString("audio/mp1"));
+        m_decoderMimeTypeSet.add(AtomString("audio/mp3"));
+        m_decoderMimeTypeSet.add(AtomString("audio/x-mp3"));
+        m_decoderCodecMap.add(AtomString("audio/mp3"), false);
+        m_decoderCodecMap.add(AtomString("mp3"), false);
     }
 
     if (hasElementForMediaType(m_audioDecoderFactories, "audio/mpeg, mpegversion=(int)2")) {
         audioMpegSupported = true;
-        m_mimeTypeSet.add(AtomString("audio/mp2"));
+        m_decoderMimeTypeSet.add(AtomString("audio/mp2"));
     }
 
-    audioMpegSupported |= isContainerTypeSupported("audio/mp4");
+    audioMpegSupported |= isContainerTypeSupported(Configuration::Decoding, "audio/mp4");
     if (audioMpegSupported) {
-        m_mimeTypeSet.add(AtomString("audio/mpeg"));
-        m_mimeTypeSet.add(AtomString("audio/x-mpeg"));
+        m_decoderMimeTypeSet.add(AtomString("audio/mpeg"));
+        m_decoderMimeTypeSet.add(AtomString("audio/x-mpeg"));
     }
 
     if (matroskaSupported) {
-        m_mimeTypeSet.add(AtomString("video/x-matroska"));
+        m_decoderMimeTypeSet.add(AtomString("video/x-matroska"));
 
         if (hasElementForMediaType(m_videoDecoderFactories, "video/x-vp10"))
-            m_mimeTypeSet.add(AtomString("video/webm"));
+            m_decoderMimeTypeSet.add(AtomString("video/webm"));
     }
 }
 
-bool GStreamerRegistryScanner::isCodecSupported(String codec, bool shouldCheckForHardwareUse) const
+void GStreamerRegistryScanner::initializeEncoders()
 {
+    // MSE is about playback, which means decoding. No need to check for encoders then.
+    if (m_isMediaSource)
+        return;
+
+    auto aacSupported = hasElementForMediaType(m_audioEncoderFactories, "audio/mpeg, mpegversion=(int)4");
+    if (hasElementForMediaType(m_audioEncoderFactories, "audio/mpeg, mpegversion=(int)4")) {
+        m_encoderCodecMap.add(AtomString("mpeg"), false);
+        m_encoderCodecMap.add(AtomString("mp4a*"), false);
+    }
+
+    auto opusSupported = hasElementForMediaType(m_audioEncoderFactories, "audio/x-opus");
+    if (opusSupported) {
+        m_encoderCodecMap.add(AtomString("opus"), false);
+        m_encoderCodecMap.add(AtomString("x-opus"), false);
+    }
+
+    auto vorbisSupported = hasElementForMediaType(m_audioEncoderFactories, "audio/x-vorbis");
+    if (vorbisSupported) {
+        m_encoderCodecMap.add(AtomString("vorbis"), false);
+        m_encoderCodecMap.add(AtomString("x-vorbis"), false);
+    }
+
+    Vector<String> av1EncodersBlacklist { "av1enc"_s };
+    auto av1EncoderAvailable = hasElementForMediaType(m_videoEncoderFactories, "video/x-av1", true, makeOptional(WTFMove(av1EncodersBlacklist)));
+    if (av1EncoderAvailable) {
+        m_encoderCodecMap.add(AtomString("av01*"), false);
+        m_encoderCodecMap.add(AtomString("av1"), false);
+        m_encoderCodecMap.add(AtomString("x-av1"), false);
+    }
+
+    auto vp8EncoderAvailable = hasElementForMediaType(m_videoEncoderFactories, "video/x-vp8", true);
+    if (vp8EncoderAvailable) {
+        m_encoderCodecMap.add(AtomString("vp8"), vp8EncoderAvailable.isUsingHardware);
+        m_encoderCodecMap.add(AtomString("x-vp8"), vp8EncoderAvailable.isUsingHardware);
+        m_encoderCodecMap.add(AtomString("vp8.0"), vp8EncoderAvailable.isUsingHardware);
+    }
+
+    auto vp9EncoderAvailable = hasElementForMediaType(m_videoEncoderFactories, "video/x-vp9", true);
+    if (vp9EncoderAvailable) {
+        m_encoderCodecMap.add(AtomString("vp9"), vp9EncoderAvailable.isUsingHardware);
+        m_encoderCodecMap.add(AtomString("x-vp9"), vp9EncoderAvailable.isUsingHardware);
+        m_encoderCodecMap.add(AtomString("vp9.0"), vp9EncoderAvailable.isUsingHardware);
+        m_encoderCodecMap.add(AtomString("vp09*"), vp9EncoderAvailable.isUsingHardware);
+    }
+
+    if (hasElementForMediaType(m_muxerFactories, "video/webm") && (vp8EncoderAvailable || vp9EncoderAvailable || av1EncoderAvailable))
+        m_encoderMimeTypeSet.add(AtomString("video/webm"));
+
+    if (hasElementForMediaType(m_muxerFactories, "audio/webm")) {
+        if (opusSupported)
+            m_encoderMimeTypeSet.add(AtomString("audio/opus"));
+        m_encoderMimeTypeSet.add(AtomString("audio/webm"));
+    }
+
+    if (hasElementForMediaType(m_muxerFactories, "audio/ogg") && (vorbisSupported || opusSupported))
+        m_encoderMimeTypeSet.add(AtomString("audio/ogg"));
+
+    auto h264EncoderAvailable = hasElementForMediaType(m_videoEncoderFactories, "video/x-h264, profile="" constrained-baseline, baseline, high }", true);
+    if (h264EncoderAvailable) {
+        m_encoderCodecMap.add(AtomString("x-h264"), h264EncoderAvailable.isUsingHardware);
+        m_encoderCodecMap.add(AtomString("avc*"), h264EncoderAvailable.isUsingHardware);
+        m_encoderCodecMap.add(AtomString("mp4v*"), h264EncoderAvailable.isUsingHardware);
+    }
+
+    if (hasElementForMediaType(m_muxerFactories, "video/quicktime")) {
+        if (opusSupported)
+            m_encoderMimeTypeSet.add(AtomString("audio/opus"));
+        if (aacSupported) {
+            m_encoderMimeTypeSet.add(AtomString("audio/aac"));
+            m_encoderMimeTypeSet.add(AtomString("audio/mp4"));
+            m_encoderMimeTypeSet.add(AtomString("audio/x-m4a"));
+        }
+        if (h264EncoderAvailable) {
+            m_encoderMimeTypeSet.add(AtomString("video/mp4"));
+            m_encoderMimeTypeSet.add(AtomString("video/x-m4v"));
+        }
+    }
+}
+
+bool GStreamerRegistryScanner::isCodecSupported(Configuration configuration, String codec, bool shouldCheckForHardwareUse) const
+{
     // If the codec is named like a mimetype (eg: video/avc) remove the "video/" part.
     size_t slashIndex = codec.find('/');
     if (slashIndex != WTF::notFound)
@@ -304,9 +453,10 @@
 
     bool supported = false;
     if (codec.startsWith("avc1"))
-        supported = isAVC1CodecSupported(codec, shouldCheckForHardwareUse);
+        supported = isAVC1CodecSupported(configuration, codec, shouldCheckForHardwareUse);
     else {
-        for (const auto& item : m_codecMap) {
+        auto& codecMap = configuration == Configuration::Decoding ? m_decoderCodecMap : m_encoderCodecMap;
+        for (const auto& item : codecMap) {
             if (!fnmatch(item.key.string().utf8().data(), codec.utf8().data(), 0)) {
                 supported = shouldCheckForHardwareUse ? item.value : true;
                 if (supported)
@@ -315,16 +465,17 @@
         }
     }
 
-    GST_LOG("Checked %s codec \"%s\" supported %s", shouldCheckForHardwareUse ? "hardware" : "software", codec.utf8().data(), boolForPrinting(supported));
+    const char* configLogString = configurationNameForLogging(configuration);
+    GST_LOG("Checked %s %s codec \"%s\" supported %s", shouldCheckForHardwareUse ? "hardware" : "software", configLogString, codec.utf8().data(), boolForPrinting(supported));
     return supported;
 }
 
-MediaPlayerEnums::SupportsType GStreamerRegistryScanner::isContentTypeSupported(const ContentType& contentType, const Vector<ContentType>& contentTypesRequiringHardwareSupport) const
+MediaPlayerEnums::SupportsType GStreamerRegistryScanner::isContentTypeSupported(Configuration configuration, const ContentType& contentType, const Vector<ContentType>& contentTypesRequiringHardwareSupport) const
 {
     using SupportsType = MediaPlayerEnums::SupportsType;
 
-    const auto& containerType = contentType.containerType();
-    if (!isContainerTypeSupported(containerType))
+    const auto& containerType = contentType.containerType().convertToASCIILowercase();
+    if (!isContainerTypeSupported(configuration, containerType))
         return SupportsType::IsNotSupported;
 
     const auto& codecs = contentType.codecs();
@@ -333,7 +484,8 @@
     if (codecs.isEmpty())
         return SupportsType::MayBeSupported;
 
-    for (const auto& codec : codecs) {
+    for (const auto& item : codecs) {
+        auto codec = item.convertToASCIILowercase();
         bool requiresHardwareSupport = contentTypesRequiringHardwareSupport
             .findMatching([containerType, codec](auto& hardwareContentType) -> bool {
             auto hardwareContainer = hardwareContentType.containerType();
@@ -346,16 +498,16 @@
                     return !fnmatch(hardwareCodec.utf8().data(), codec.utf8().data(), 0);
             }) != notFound;
         }) != notFound;
-        if (!isCodecSupported(codec, requiresHardwareSupport))
+        if (!isCodecSupported(configuration, codec, requiresHardwareSupport))
             return SupportsType::IsNotSupported;
     }
     return SupportsType::IsSupported;
 }
 
-bool GStreamerRegistryScanner::areAllCodecsSupported(const Vector<String>& codecs, bool shouldCheckForHardwareUse) const
+bool GStreamerRegistryScanner::areAllCodecsSupported(Configuration configuration, const Vector<String>& codecs, bool shouldCheckForHardwareUse) const
 {
     for (String codec : codecs) {
-        if (!isCodecSupported(codec, shouldCheckForHardwareUse))
+        if (!isCodecSupported(configuration, codec, shouldCheckForHardwareUse))
             return false;
     }
 
@@ -362,11 +514,19 @@
     return true;
 }
 
-bool GStreamerRegistryScanner::isAVC1CodecSupported(const String& codec, bool shouldCheckForHardwareUse) const
+bool GStreamerRegistryScanner::isAVC1CodecSupported(Configuration configuration, const String& codec, bool shouldCheckForHardwareUse) const
 {
     auto checkH264Caps = [&](const char* capsString) {
         bool supported = false;
-        auto lookupResult = hasElementForMediaType(m_videoDecoderFactories, capsString, true);
+        RegistryLookupResult lookupResult;
+        switch (configuration) {
+        case Configuration::Decoding:
+            lookupResult = hasElementForMediaType(m_videoDecoderFactories, capsString, true);
+            break;
+        case Configuration::Encoding:
+            lookupResult = hasElementForMediaType(m_videoEncoderFactories, capsString, true);
+            break;
+        }
         supported = lookupResult;
         if (shouldCheckForHardwareUse)
             supported = lookupResult.isUsingHardware;
@@ -437,32 +597,48 @@
     return checkH264Caps("video/x-h264");
 }
 
-GStreamerRegistryScanner::RegistryLookupResult GStreamerRegistryScanner::isDecodingSupported(MediaConfiguration& configuration) const
+const char* GStreamerRegistryScanner::configurationNameForLogging(Configuration configuration) const
 {
+    const char* configLogString = "";
+
+    switch (configuration) {
+    case Configuration::Encoding:
+        configLogString = "encoding";
+        break;
+    case Configuration::Decoding:
+        configLogString = "decoding";
+        break;
+    }
+    return configLogString;
+}
+
+GStreamerRegistryScanner::RegistryLookupResult GStreamerRegistryScanner::isConfigurationSupported(Configuration configuration, MediaConfiguration& mediaConfiguration) const
+{
     bool isSupported = false;
     bool isUsingHardware = false;
+    const char* configLogString = configurationNameForLogging(configuration);
 
-    if (configuration.video) {
-        auto& videoConfiguration = configuration.video.value();
-        GST_DEBUG("Checking support for video configuration: \"%s\" size: %ux%u bitrate: %" G_GUINT64_FORMAT " framerate: %f",
+    if (mediaConfiguration.video) {
+        auto& videoConfiguration = mediaConfiguration.video.value();
+        GST_DEBUG("Checking %s support for video configuration: \"%s\" size: %ux%u bitrate: %" G_GUINT64_FORMAT " framerate: %f", configLogString,
             videoConfiguration.contentType.utf8().data(),
             videoConfiguration.width, videoConfiguration.height,
             videoConfiguration.bitrate, videoConfiguration.framerate);
 
         auto contentType = ContentType(videoConfiguration.contentType);
-        isSupported = isContainerTypeSupported(contentType.containerType());
+        isSupported = isContainerTypeSupported(configuration, contentType.containerType());
         auto codecs = contentType.codecs();
         if (!codecs.isEmpty())
-            isUsingHardware = areAllCodecsSupported(codecs, true);
+            isUsingHardware = areAllCodecsSupported(configuration, codecs, true);
     }
 
-    if (configuration.audio) {
-        auto& audioConfiguration = configuration.audio.value();
-        GST_DEBUG("Checking support for audio configuration: \"%s\" %s channels, bitrate: %" G_GUINT64_FORMAT " samplerate: %u",
+    if (mediaConfiguration.audio) {
+        auto& audioConfiguration = mediaConfiguration.audio.value();
+        GST_DEBUG("Checking %s support for audio configuration: \"%s\" %s channels, bitrate: %" G_GUINT64_FORMAT " samplerate: %u", configLogString,
             audioConfiguration.contentType.utf8().data(), audioConfiguration.channels.utf8().data(),
             audioConfiguration.bitrate, audioConfiguration.samplerate);
         auto contentType = ContentType(audioConfiguration.contentType);
-        isSupported = isContainerTypeSupported(contentType.containerType());
+        isSupported = isContainerTypeSupported(configuration, contentType.containerType());
     }
 
     return GStreamerRegistryScanner::RegistryLookupResult { isSupported, isUsingHardware };

Modified: trunk/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.h (268575 => 268576)


--- trunk/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.h	2020-10-16 07:52:45 UTC (rev 268575)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.h	2020-10-16 08:52:38 UTC (rev 268576)
@@ -39,9 +39,13 @@
 public:
     static GStreamerRegistryScanner& singleton();
 
-    HashSet<String, ASCIICaseInsensitiveHash>& mimeTypeSet() { return m_mimeTypeSet; }
+    enum Configuration {
+        Decoding = 0,
+        Encoding
+    };
 
-    bool isContainerTypeSupported(String containerType) const { return m_mimeTypeSet.contains(containerType); }
+    const HashSet<String, ASCIICaseInsensitiveHash>& mimeTypeSet(Configuration);
+    bool isContainerTypeSupported(Configuration, String containerType) const;
 
     struct RegistryLookupResult {
         bool isSupported;
@@ -49,22 +53,29 @@
 
         operator bool() const { return isSupported; }
     };
-    RegistryLookupResult isDecodingSupported(MediaConfiguration&) const;
+    RegistryLookupResult isDecodingSupported(MediaConfiguration& mediaConfiguration) const { return isConfigurationSupported(Configuration::Decoding, mediaConfiguration); };
+    RegistryLookupResult isEncodingSupported(MediaConfiguration& mediaConfiguration) const { return isConfigurationSupported(Configuration::Encoding, mediaConfiguration); }
 
-    bool isCodecSupported(String codec, bool usingHardware = false) const;
-    MediaPlayerEnums::SupportsType isContentTypeSupported(const ContentType&, const Vector<ContentType>& contentTypesRequiringHardwareSupport) const;
-    bool areAllCodecsSupported(const Vector<String>& codecs, bool shouldCheckForHardwareUse = false) const;
+    bool isCodecSupported(Configuration, String codec, bool usingHardware = false) const;
+    MediaPlayerEnums::SupportsType isContentTypeSupported(Configuration, const ContentType&, const Vector<ContentType>& contentTypesRequiringHardwareSupport) const;
+    bool areAllCodecsSupported(Configuration, const Vector<String>& codecs, bool shouldCheckForHardwareUse = false) const;
 
 protected:
     GStreamerRegistryScanner(bool isMediaSource = false);
     ~GStreamerRegistryScanner();
 
-    void initialize();
+    void initializeDecoders();
+    void initializeEncoders();
 
+    RegistryLookupResult isConfigurationSupported(Configuration, MediaConfiguration&) const;
+
     enum ElementType {
         AudioDecoder = 0,
         VideoDecoder,
-        Demuxer
+        Demuxer,
+        AudioEncoder,
+        VideoEncoder,
+        Muxer
     };
     struct GstCapsWebKitMapping {
         ElementType elementType;
@@ -76,9 +87,11 @@
 
     RegistryLookupResult hasElementForMediaType(GList* elementFactories, const char* capsString, bool shouldCheckHardwareClassifier = false, Optional<Vector<String>> blackList = WTF::nullopt) const;
 
-    bool isAVC1CodecSupported(const String& codec, bool shouldCheckForHardwareUse) const;
+    bool isAVC1CodecSupported(Configuration, const String& codec, bool shouldCheckForHardwareUse) const;
 
 private:
+    const char* configurationNameForLogging(Configuration) const;
+
     bool m_isMediaSource;
     GList* m_audioDecoderFactories;
     GList* m_audioParserFactories;
@@ -85,8 +98,13 @@
     GList* m_videoDecoderFactories;
     GList* m_videoParserFactories;
     GList* m_demuxerFactories;
-    HashSet<String, ASCIICaseInsensitiveHash> m_mimeTypeSet;
-    HashMap<AtomString, bool> m_codecMap;
+    GList* m_audioEncoderFactories;
+    GList* m_videoEncoderFactories;
+    GList* m_muxerFactories;
+    HashSet<String, ASCIICaseInsensitiveHash> m_decoderMimeTypeSet;
+    HashMap<AtomString, bool> m_decoderCodecMap;
+    HashSet<String, ASCIICaseInsensitiveHash> m_encoderMimeTypeSet;
+    HashMap<AtomString, bool> m_encoderCodecMap;
 };
 
 } // namespace WebCore

Modified: trunk/Source/WebCore/platform/graphics/gstreamer/ImageDecoderGStreamer.cpp (268575 => 268576)


--- trunk/Source/WebCore/platform/graphics/gstreamer/ImageDecoderGStreamer.cpp	2020-10-16 07:52:45 UTC (rev 268575)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/ImageDecoderGStreamer.cpp	2020-10-16 08:52:38 UTC (rev 268576)
@@ -98,7 +98,7 @@
 
 bool ImageDecoderGStreamer::supportsContainerType(const String& type)
 {
-    return GStreamerRegistryScanner::singleton().isContainerTypeSupported(type);
+    return GStreamerRegistryScanner::singleton().isContainerTypeSupported(GStreamerRegistryScanner::Configuration::Decoding, type);
 }
 
 bool ImageDecoderGStreamer::canDecodeType(const String& mimeType)
@@ -106,7 +106,7 @@
     if (mimeType.isEmpty())
         return false;
 
-    return GStreamerRegistryScanner::singleton().isContainerTypeSupported(mimeType);
+    return GStreamerRegistryScanner::singleton().isContainerTypeSupported(GStreamerRegistryScanner::Configuration::Decoding, mimeType);
 }
 
 EncodedDataStatus ImageDecoderGStreamer::encodedDataStatus() const

Modified: trunk/Source/WebCore/platform/graphics/gstreamer/MediaEngineConfigurationFactoryGStreamer.cpp (268575 => 268576)


--- trunk/Source/WebCore/platform/graphics/gstreamer/MediaEngineConfigurationFactoryGStreamer.cpp	2020-10-16 07:52:45 UTC (rev 268575)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/MediaEngineConfigurationFactoryGStreamer.cpp	2020-10-16 08:52:38 UTC (rev 268576)
@@ -32,7 +32,9 @@
 
 #include "GStreamerRegistryScanner.h"
 #include "MediaCapabilitiesDecodingInfo.h"
+#include "MediaCapabilitiesEncodingInfo.h"
 #include "MediaDecodingConfiguration.h"
+#include "MediaEncodingConfiguration.h"
 #include "MediaPlayer.h"
 #include <wtf/Function.h>
 
@@ -63,5 +65,16 @@
     callback(WTFMove(info));
 }
 
+void createMediaPlayerEncodingConfigurationGStreamer(MediaEncodingConfiguration&& configuration, WTF::Function<void(MediaCapabilitiesEncodingInfo&&)>&& callback)
+{
+    auto& scanner = GStreamerRegistryScanner::singleton();
+    auto lookupResult = scanner.isEncodingSupported(configuration);
+    MediaCapabilitiesEncodingInfo info;
+    info.supported = lookupResult.isSupported;
+    info.powerEfficient = lookupResult.isUsingHardware;
+    info.supportedConfiguration = WTFMove(configuration);
+
+    callback(WTFMove(info));
 }
+}
 #endif

Modified: trunk/Source/WebCore/platform/graphics/gstreamer/MediaEngineConfigurationFactoryGStreamer.h (268575 => 268576)


--- trunk/Source/WebCore/platform/graphics/gstreamer/MediaEngineConfigurationFactoryGStreamer.h	2020-10-16 07:52:45 UTC (rev 268575)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/MediaEngineConfigurationFactoryGStreamer.h	2020-10-16 08:52:38 UTC (rev 268576)
@@ -34,10 +34,12 @@
 namespace WebCore {
 
 struct MediaCapabilitiesDecodingInfo;
+struct MediaCapabilitiesEncodingInfo;
 struct MediaDecodingConfiguration;
+struct MediaEncodingConfiguration;
 
 extern void createMediaPlayerDecodingConfigurationGStreamer(MediaDecodingConfiguration&&, WTF::Function<void(MediaCapabilitiesDecodingInfo&&)>&&);
-
+extern void createMediaPlayerEncodingConfigurationGStreamer(MediaEncodingConfiguration&&, WTF::Function<void(MediaCapabilitiesEncodingInfo&&)>&&);
 }
 
 #endif

Modified: trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp (268575 => 268576)


--- trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp	2020-10-16 07:52:45 UTC (rev 268575)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp	2020-10-16 08:52:38 UTC (rev 268576)
@@ -2663,7 +2663,7 @@
 void MediaPlayerPrivateGStreamer::getSupportedTypes(HashSet<String, ASCIICaseInsensitiveHash>& types)
 {
     auto& gstRegistryScanner = GStreamerRegistryScanner::singleton();
-    types = gstRegistryScanner.mimeTypeSet();
+    types = gstRegistryScanner.mimeTypeSet(GStreamerRegistryScanner::Configuration::Decoding);
 }
 
 MediaPlayer::SupportsType MediaPlayerPrivateGStreamer::supportsType(const MediaEngineSupportParameters& parameters)
@@ -2685,7 +2685,7 @@
 
     GST_DEBUG("Checking mime-type \"%s\"", parameters.type.raw().utf8().data());
     auto& gstRegistryScanner = GStreamerRegistryScanner::singleton();
-    result = gstRegistryScanner.isContentTypeSupported(parameters.type, parameters.contentTypesRequiringHardwareSupport);
+    result = gstRegistryScanner.isContentTypeSupported(GStreamerRegistryScanner::Configuration::Decoding, parameters.type, parameters.contentTypesRequiringHardwareSupport);
 
     auto finalResult = extendedSupportsType(parameters, result);
     GST_DEBUG("Supported: %s", convertEnumerationToString(finalResult).utf8().data());

Modified: trunk/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp (268575 => 268576)


--- trunk/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp	2020-10-16 07:52:45 UTC (rev 268575)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp	2020-10-16 08:52:38 UTC (rev 268576)
@@ -397,7 +397,7 @@
 
     const char* originalMediaType = capsMediaType(m_demuxerSrcPadCaps.get());
     auto& gstRegistryScanner = GStreamerRegistryScannerMSE::singleton();
-    if (!gstRegistryScanner.isCodecSupported(originalMediaType)) {
+    if (!gstRegistryScanner.isCodecSupported(GStreamerRegistryScanner::Configuration::Decoding, originalMediaType)) {
             m_presentationSize = WebCore::FloatSize();
             m_streamType = WebCore::MediaSourceStreamTypeGStreamer::Invalid;
     } else if (doCapsHaveType(m_demuxerSrcPadCaps.get(), GST_VIDEO_CAPS_TYPE_PREFIX)) {

Modified: trunk/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp (268575 => 268576)


--- trunk/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp	2020-10-16 07:52:45 UTC (rev 268575)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp	2020-10-16 08:52:38 UTC (rev 268576)
@@ -711,7 +711,7 @@
 void MediaPlayerPrivateGStreamerMSE::getSupportedTypes(HashSet<String, ASCIICaseInsensitiveHash>& types)
 {
     auto& gstRegistryScanner = GStreamerRegistryScannerMSE::singleton();
-    types = gstRegistryScanner.mimeTypeSet();
+    types = gstRegistryScanner.mimeTypeSet(GStreamerRegistryScanner::Configuration::Decoding);
 }
 
 MediaPlayer::SupportsType MediaPlayerPrivateGStreamerMSE::supportsType(const MediaEngineSupportParameters& parameters)
@@ -731,7 +731,7 @@
 
     GST_DEBUG("Checking mime-type \"%s\"", parameters.type.raw().utf8().data());
     auto& gstRegistryScanner = GStreamerRegistryScannerMSE::singleton();
-    result = gstRegistryScanner.isContentTypeSupported(parameters.type, parameters.contentTypesRequiringHardwareSupport);
+    result = gstRegistryScanner.isContentTypeSupported(GStreamerRegistryScanner::Configuration::Decoding, parameters.type, parameters.contentTypesRequiringHardwareSupport);
 
     auto finalResult = extendedSupportsType(parameters, result);
     GST_DEBUG("Supported: %s", convertEnumerationToString(finalResult).utf8().data());

Modified: trunk/Source/WebCore/platform/mediacapabilities/MediaEngineConfigurationFactory.cpp (268575 => 268576)


--- trunk/Source/WebCore/platform/mediacapabilities/MediaEngineConfigurationFactory.cpp	2020-10-16 07:52:45 UTC (rev 268575)
+++ trunk/Source/WebCore/platform/mediacapabilities/MediaEngineConfigurationFactory.cpp	2020-10-16 08:52:38 UTC (rev 268576)
@@ -66,7 +66,7 @@
         { &createMediaPlayerDecodingConfigurationCocoa, nullptr },
 #endif
 #if USE(GSTREAMER)
-        { &createMediaPlayerDecodingConfigurationGStreamer, nullptr },
+        { &createMediaPlayerDecodingConfigurationGStreamer, &createMediaPlayerEncodingConfigurationGStreamer },
 #endif
     }));
     return factories;
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