Diff
Added: releases/WebKitGTK/webkit-2.36/LayoutTests/media/media-source/content/test-48kHz-new-track-id.m4a (0 => 294795)
--- releases/WebKitGTK/webkit-2.36/LayoutTests/media/media-source/content/test-48kHz-new-track-id.m4a (rev 0)
+++ releases/WebKitGTK/webkit-2.36/LayoutTests/media/media-source/content/test-48kHz-new-track-id.m4a 2022-05-25 13:45:35 UTC (rev 294795)
@@ -0,0 +1,93 @@
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+\x96\xA9\x96\x99h)2$K\xBB\xD06\xCD\xC0| \xC1\xF0 \xAC
+$=XHz\xB0(\x90\xF4\xE0_\xEA\xC0\xA2CՁD\x87\xAD\x81\xF5`Q!p!M/D_T\x90\x81\xBEi!~A +\xEB\xBF\xAFo\xB7\xFF ^}\xBE\xF7\xD4\xC7\xCF\xFF\xDA\xFDt\xFD\xFA\xCD^\x9Fg\xAB\x89V \xB5G\xE6?֔\xFC\xC0Kщ\xFB\xA3Ԥ\xAF\xCB"b\x93 \x8B\xFEo\xA8\x92r\xA8I @L\xAC/\xEE\xFC\x97\xC2\xF7\xE5`\xFFw\xEA\xDF#\x90\x81\xF5_\xB7|\xADzn\xD5\xC0\xE7Y\xCEJw+e\x92\x9D\x92j&\x9A\xE7\9.lj֯\x95u\xB6L \xEF
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\ No newline at end of file
Added: releases/WebKitGTK/webkit-2.36/LayoutTests/media/media-source/content/test-48khz-new-track-id-manifest.json (0 => 294795)
--- releases/WebKitGTK/webkit-2.36/LayoutTests/media/media-source/content/test-48khz-new-track-id-manifest.json (rev 0)
+++ releases/WebKitGTK/webkit-2.36/LayoutTests/media/media-source/content/test-48khz-new-track-id-manifest.json 2022-05-25 13:45:35 UTC (rev 294795)
@@ -0,0 +1,19 @@
+{
+ "url": "content/test-48kHz-new-track-id.m4a",
+ "type": "audio/mp4; codecs=\"mp4a.40.2\"",
+ "init": { "offset": 0, "size": 624 },
+ "duration": 10.0906,
+ "media": [
+ { "offset": 624, "size": 1308, "timestamp": 0, "duration": 1.0027},
+ { "offset": 1932, "size": 1491, "timestamp": 1.0027, "duration": 1.0027},
+ { "offset": 3423, "size": 1341, "timestamp": 2.0053, "duration": 1.0027},
+ { "offset": 4764, "size": 1563, "timestamp": 3.008, "duration": 0.9813},
+ { "offset": 6327, "size": 1425, "timestamp": 3.9893, "duration": 1.0027},
+ { "offset": 7752, "size": 1770, "timestamp": 4.992, "duration": 1.0027},
+ { "offset": 9522, "size": 1910, "timestamp": 5.9947, "duration": 1.0027},
+ { "offset": 11432, "size": 1887, "timestamp": 6.9973, "duration": 1.0027},
+ { "offset": 13319, "size": 1919, "timestamp": 8, "duration": 1.0027},
+ { "offset": 15238, "size": 1892, "timestamp": 9.0027, "duration": 1.0027},
+ { "offset": 17130, "size": 1231, "timestamp": 10.0053, "duration": 0.0853}
+ ]
+}
Added: releases/WebKitGTK/webkit-2.36/LayoutTests/media/media-source/media-source-audio-track-id-switch-expected.txt (0 => 294795)
--- releases/WebKitGTK/webkit-2.36/LayoutTests/media/media-source/media-source-audio-track-id-switch-expected.txt (rev 0)
+++ releases/WebKitGTK/webkit-2.36/LayoutTests/media/media-source/media-source-audio-track-id-switch-expected.txt 2022-05-25 13:45:35 UTC (rev 294795)
@@ -0,0 +1,12 @@
+
+RUN(audio.src = ""
+EVENT(sourceopen)
+RUN(source.duration = loader.duration())
+RUN(sourceBuffer = source.addSourceBuffer(loader.type()))
+RUN(sourceBuffer.appendBuffer(loader.initSegment()))
+EVENT(updateend)
+Switching to a similar audio stream but with different mp4 track ID.
+RUN(sourceBuffer.appendBuffer(loader.initSegment()))
+EVENT(updateend)
+END OF TEST
+
Added: releases/WebKitGTK/webkit-2.36/LayoutTests/media/media-source/media-source-audio-track-id-switch.html (0 => 294795)
--- releases/WebKitGTK/webkit-2.36/LayoutTests/media/media-source/media-source-audio-track-id-switch.html (rev 0)
+++ releases/WebKitGTK/webkit-2.36/LayoutTests/media/media-source/media-source-audio-track-id-switch.html 2022-05-25 13:45:35 UTC (rev 294795)
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<html>
+<head>
+ <title>media-source-audio-track-id-switch</title>
+ <script src=""
+ <script src=""
+ <script>
+ var loader;
+ var source;
+ var sourceBuffer;
+ var audio;
+
+ function runTest() {
+ audio = document.getElementsByTagName('audio')[0];
+
+ loader = new MediaSourceLoader('content/test-48khz-manifest.json');
+ loader._onload_ = mediaDataLoaded;
+ loader._onerror_ = mediaDataLoadingFailed;
+ }
+
+ function mediaDataLoadingFailed() {
+ failTest('Media data loading failed');
+ }
+
+ function mediaDataLoaded() {
+ source = new MediaSource();
+ waitForEvent('sourceopen', sourceOpen, false, false, source);
+ run('audio.src = ""
+ }
+
+ function sourceOpen() {
+ run('source.duration = loader.duration()');
+ run('sourceBuffer = source.addSourceBuffer(loader.type())');
+ sourceBuffer.addEventListener('error', mediaDataLoadingFailed);
+ waitForEventOn(sourceBuffer, 'updateend', sourceInitialized, false, true);
+ run('sourceBuffer.appendBuffer(loader.initSegment())');
+ }
+
+ function sourceInitialized() {
+ consoleWrite('Switching to a similar audio stream but with different mp4 track ID.')
+ loader = new MediaSourceLoader('content/test-48khz-new-track-id-manifest.json');
+ loader._onload_ = newTrackMediaDataLoaded;
+ loader._onerror_ = mediaDataLoadingFailed;
+ }
+
+ function newTrackMediaDataLoaded() {
+ waitForEventOn(sourceBuffer, 'updateend', endTest, false, true);
+ run('sourceBuffer.appendBuffer(loader.initSegment())');
+ }
+ </script>
+</head>
+<body _onload_="runTest()">
+ <audio controls/>
+</body>
+</html>
Modified: releases/WebKitGTK/webkit-2.36/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp (294794 => 294795)
--- releases/WebKitGTK/webkit-2.36/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp 2022-05-25 13:32:59 UTC (rev 294794)
+++ releases/WebKitGTK/webkit-2.36/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.cpp 2022-05-25 13:45:35 UTC (rev 294795)
@@ -261,6 +261,7 @@
ASSERT(!isMainThread());
GST_WARNING_OBJECT(m_pipeline.get(), "Demuxing error: %" GST_PTR_FORMAT, message);
handleErrorConditionFromStreamingThread();
+ GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS(GST_BIN(m_pipeline.get()), GST_DEBUG_GRAPH_SHOW_ALL, "demuxing-error");
}
GstPadProbeReturn AppendPipeline::appsrcEndOfAppendCheckerProbe(GstPadProbeInfo* padProbeInfo)
@@ -451,23 +452,50 @@
trackIndex++;
}
} else {
- // Link pads to existing Track objects that don't have a linked pad yet.
- unsigned countPads = 0;
+ // Since we don't rely on the demuxer pad-added signal and this pipeline is not
+ // stream-aware, we need to account for stream topology changes ourselves.
+ unsigned videoPadsCount = 0;
+ unsigned audioPadsCount = 0;
+ unsigned textPadsCount = 0;
+ for (auto pad : GstIteratorAdaptor<GstPad>(GUniquePtr<GstIterator>(gst_element_iterate_src_pads(m_demux.get())))) {
+ if (gst_pad_is_linked(pad))
+ continue;
+ auto [parsedCaps, streamType, presentationSize] = parseDemuxerSrcPadCaps(adoptGRef(gst_pad_get_current_caps(pad)).get());
+ if (streamType == StreamType::Audio)
+ audioPadsCount++;
+ else if (streamType == StreamType::Video)
+ videoPadsCount++;
+ else if (streamType == StreamType::Text)
+ textPadsCount++;
+ }
+
+ unsigned videoTracksCount = 0;
+ unsigned audioTracksCount = 0;
+ unsigned textTracksCount = 0;
+ for (const auto& track : m_tracks) {
+ if (track->streamType == StreamType::Audio)
+ audioTracksCount++;
+ else if (track->streamType == StreamType::Video)
+ videoTracksCount++;
+ else if (track->streamType == StreamType::Text)
+ textTracksCount++;
+ }
+
+ if (videoPadsCount < videoTracksCount || audioPadsCount < audioTracksCount || textPadsCount < textTracksCount) {
+ GST_WARNING_OBJECT(pipeline(), "New demuxed stream topology doesn't match the existing tracks topology");
+ m_sourceBufferPrivate.appendParsingFailed();
+ return;
+ }
+
+ // Link pads to existing Track objects that don't have a linked pad yet. Existing linked
+ // tracks are recycled if their stream type matches the new demuxer source pads.
for (GstPad* pad : GstIteratorAdaptor<GstPad>(GUniquePtr<GstIterator>(gst_element_iterate_src_pads(m_demux.get())))) {
- countPads++;
- Track* track = tryMatchPadToExistingTrack(pad);
- if (!track) {
+ if (!recycleTrackForPad(pad)) {
GST_WARNING_OBJECT(pipeline(), "Can't match pad to existing tracks in the AppendPipeline: %" GST_PTR_FORMAT, pad);
m_sourceBufferPrivate.appendParsingFailed();
return;
}
- linkPadWithTrack(pad, *track);
}
- if (countPads != m_tracks.size()) {
- GST_WARNING_OBJECT(pipeline(), "Number of pads (%u) doesn't match number of tracks (%zu).", countPads, m_tracks.size());
- m_sourceBufferPrivate.appendParsingFailed();
- return;
- }
}
for (std::unique_ptr<Track>& track : m_tracks) {
@@ -640,8 +668,8 @@
{
GstStructure* structure = gst_caps_get_structure(caps, 0);
const char* mediaType = gst_structure_get_name(structure);
- GUniquePtr<char> parserName(g_strdup_printf("%s_parser", trackId.string().utf8().data()));
- const gchar* elementClass = "identity";
+ auto parserName = makeString(trackId, "_parser"_s);
+ const char* elementClass = "identity";
if (!g_strcmp0(mediaType, "audio/x-opus"))
elementClass = "opusparse";
@@ -658,13 +686,12 @@
case 4:
elementClass = "aacparse";
break;
- default: {
- GUniquePtr<char> capsString(gst_caps_to_string(caps));
- GST_WARNING("Unsupported audio mpeg caps: %s", capsString.get());
+ default:
+ GST_WARNING("Unsupported audio mpeg caps: %" GST_PTR_FORMAT, caps);
}
- }
}
- return GRefPtr<GstElement>(makeGStreamerElement(elementClass, parserName.get()));
+ GST_DEBUG("Creating %s parser for stream with caps %" GST_PTR_FORMAT, elementClass, caps);
+ return GRefPtr<GstElement>(makeGStreamerElement(elementClass, parserName.ascii().data()));
}
AtomString AppendPipeline::generateTrackId(StreamType streamType, int padIndex)
@@ -723,7 +750,7 @@
return { CreateTrackResult::TrackCreated, &track };
}
-AppendPipeline::Track* AppendPipeline::tryMatchPadToExistingTrack(GstPad *demuxerSrcPad)
+bool AppendPipeline::recycleTrackForPad(GstPad* demuxerSrcPad)
{
ASSERT(isMainThread());
ASSERT(m_hasReceivedFirstInitializationSegment);
@@ -730,11 +757,13 @@
AtomString trackId = GST_PAD_NAME(demuxerSrcPad);
auto [parsedCaps, streamType, presentationSize] = parseDemuxerSrcPadCaps(adoptGRef(gst_pad_get_current_caps(demuxerSrcPad)).get());
+ GST_DEBUG_OBJECT(demuxerSrcPad, "Caps: %" GST_PTR_FORMAT, parsedCaps.get());
+
// Try to find a matching pre-existing track. Ideally, tracks should be matched by track ID, but matching by type
// is provided as a fallback -- which will be used, since we don't have a way to fetch those from GStreamer at the moment.
Track* matchingTrack = nullptr;
for (std::unique_ptr<Track>& track : m_tracks) {
- if (track->streamType != streamType || gst_pad_is_linked(track->entryPad.get()))
+ if (track->streamType != streamType)
continue;
matchingTrack = &*track;
if (track->trackId == trackId)
@@ -746,12 +775,38 @@
GST_WARNING_OBJECT(pipeline(), "Couldn't find a matching pre-existing track for pad '%s' with parsed caps %" GST_PTR_FORMAT
" on non-first initialization segment, will be connected to a black hole probe.", GST_PAD_NAME(demuxerSrcPad), parsedCaps.get());
gst_pad_add_probe(demuxerSrcPad, GST_PAD_PROBE_TYPE_BUFFER, reinterpret_cast<GstPadProbeCallback>(appendPipelineDemuxerBlackHolePadProbe), nullptr, nullptr);
+ return false;
}
- return matchingTrack;
+
+ if (!matchingTrack->isLinked())
+ linkPadWithTrack(demuxerSrcPad, *matchingTrack);
+ else {
+ // Unlink from old track and link to new track, by 1. stopping parser/sink, 2. unlinking
+ // demuxer from track, 3. restarting parser/sink.
+ if (matchingTrack->parser)
+ gst_element_set_state(matchingTrack->parser.get(), GST_STATE_NULL);
+ gst_element_set_state(matchingTrack->appsink.get(), GST_STATE_NULL);
+
+ auto peer = adoptGRef(gst_pad_get_peer(matchingTrack->entryPad.get()));
+ if (peer.get() != demuxerSrcPad) {
+ GST_DEBUG_OBJECT(peer.get(), "Unlinking from track %s", matchingTrack->trackId.string().ascii().data());
+ gst_pad_unlink(peer.get(), matchingTrack->entryPad.get());
+ linkPadWithTrack(demuxerSrcPad, *matchingTrack);
+ matchingTrack->caps = WTFMove(parsedCaps);
+ matchingTrack->presentationSize = presentationSize;
+ } else
+ GST_DEBUG_OBJECT(pipeline(), "%s track pads match, nothing to re-link", matchingTrack->trackId.string().ascii().data());
+
+ gst_element_set_state(matchingTrack->appsink.get(), GST_STATE_PLAYING);
+ if (matchingTrack->parser)
+ gst_element_set_state(matchingTrack->parser.get(), GST_STATE_PLAYING);
+ }
+ return true;
}
void AppendPipeline::linkPadWithTrack(GstPad* demuxerSrcPad, Track& track)
{
+ GST_DEBUG_OBJECT(demuxerSrcPad, "Linking to track %s", track.trackId.string().ascii().data());
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS(GST_BIN(m_pipeline.get()), GST_DEBUG_GRAPH_SHOW_ALL, "append-pipeline-before-link");
ASSERT(!GST_PAD_IS_LINKED(track.entryPad.get()));
gst_pad_link(demuxerSrcPad, track.entryPad.get());
Modified: releases/WebKitGTK/webkit-2.36/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.h (294794 => 294795)
--- releases/WebKitGTK/webkit-2.36/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.h 2022-05-25 13:32:59 UTC (rev 294794)
+++ releases/WebKitGTK/webkit-2.36/Source/WebCore/platform/graphics/gstreamer/mse/AppendPipeline.h 2022-05-25 13:45:35 UTC (rev 294795)
@@ -98,6 +98,7 @@
#endif
void initializeElements(AppendPipeline*, GstBin*);
+ bool isLinked() const { return gst_pad_is_linked(entryPad.get()); }
};
void handleErrorSyncMessage(GstMessage*);
@@ -124,7 +125,8 @@
static AtomString generateTrackId(StreamType, int padIndex);
enum class CreateTrackResult { TrackCreated, TrackIgnored, AppendParsingFailed };
std::pair<CreateTrackResult, AppendPipeline::Track*> tryCreateTrackFromPad(GstPad* demuxerSrcPad, int padIndex);
- AppendPipeline::Track* tryMatchPadToExistingTrack(GstPad* demuxerSrcPad);
+
+ bool recycleTrackForPad(GstPad*);
void linkPadWithTrack(GstPad* demuxerSrcPad, Track&);
void consumeAppsinksAvailableSamples();
