aad293dacc
Pass direct Core::EventLoop references through media producer and playback plumbing that posts work back to the main thread. The browser process main loops stay alive for the process lifetime, so these paths no longer need weak event loop references. Update LibMedia tests to pass their stack event loop directly to the producer helpers.
435 lines
15 KiB
C++
435 lines
15 KiB
C++
/*
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* Copyright (c) 2022-2026, Gregory Bertilson <gregory@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibMedia/Containers/Matroska/MatroskaDemuxer.h>
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#include <LibMedia/Demuxer.h>
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#include <LibMedia/FFmpeg/FFmpegDemuxer.h>
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#include <LibMedia/GenericTimeProvider.h>
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#include <LibMedia/PlaybackStates/StartingStateHandler.h>
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#include <LibMedia/Processors/AudioMixer.h>
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#include <LibMedia/Producers/DecodedAudioProducer.h>
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#include <LibMedia/Producers/DecodedVideoProducer.h>
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#include <LibMedia/Sinks/AudioPlaybackSink.h>
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#include <LibMedia/Sinks/DisplayingVideoSink.h>
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#include <LibMedia/Track.h>
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#include <LibThreading/Thread.h>
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#include <LibThreading/ThreadPool.h>
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#include "PlaybackManager.h"
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namespace Media {
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DecoderErrorOr<NonnullRefPtr<Demuxer>> PlaybackManager::create_demuxer_for_stream(NonnullRefPtr<MediaStream> const& stream)
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{
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if (Matroska::Reader::is_matroska_or_webm(stream->create_cursor()))
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return Matroska::MatroskaDemuxer::from_stream(stream);
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return FFmpeg::FFmpegDemuxer::from_stream(stream);
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}
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DecoderErrorOr<void> PlaybackManager::prepare_playback_from_demuxer(WeakPlaybackManager const& self, NonnullRefPtr<Demuxer> const& demuxer, Core::EventLoop& main_thread_event_loop)
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{
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// Create the video tracks and their producers.
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auto all_video_tracks = TRY(demuxer->get_tracks_for_type(TrackType::Video));
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auto supported_video_tracks = VideoTracks();
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auto supported_video_track_datas = VideoTrackDatas();
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supported_video_tracks.ensure_capacity(all_video_tracks.size());
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supported_video_track_datas.ensure_capacity(all_video_tracks.size());
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for (auto const& track : all_video_tracks) {
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auto video_producer_result = DecodedVideoProducer::try_create(main_thread_event_loop, demuxer, track);
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if (video_producer_result.is_error())
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continue;
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supported_video_tracks.append(track);
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supported_video_track_datas.empend(VideoTrackData(track, video_producer_result.release_value(), nullptr));
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}
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supported_video_tracks.shrink_to_fit();
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supported_video_track_datas.shrink_to_fit();
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// Create all the audio tracks, their producers, and the audio output.
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auto all_audio_tracks = TRY(demuxer->get_tracks_for_type(TrackType::Audio));
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auto supported_audio_tracks = AudioTracks();
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auto supported_audio_track_datas = AudioTrackDatas();
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supported_audio_tracks.ensure_capacity(all_audio_tracks.size());
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supported_audio_track_datas.ensure_capacity(all_audio_tracks.size());
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for (auto const& track : all_audio_tracks) {
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auto audio_producer_result = DecodedAudioProducer::try_create(main_thread_event_loop, demuxer, track);
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if (audio_producer_result.is_error())
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continue;
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auto audio_producer = audio_producer_result.release_value();
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supported_audio_tracks.append(track);
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supported_audio_track_datas.empend(AudioTrackData(track, move(audio_producer)));
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}
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supported_audio_tracks.shrink_to_fit();
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supported_audio_track_datas.shrink_to_fit();
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if (supported_video_tracks.is_empty() && supported_audio_tracks.is_empty())
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return DecoderError::with_description(DecoderErrorCategory::NotImplemented, "No supported video or audio tracks found"sv);
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auto preferred_video_track = demuxer->get_preferred_track_for_type(TrackType::Video).value_or({});
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if (preferred_video_track.has_value() && !supported_video_tracks.contains_slow(*preferred_video_track))
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preferred_video_track = {};
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auto preferred_audio_track = demuxer->get_preferred_track_for_type(TrackType::Audio).value_or({});
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if (preferred_audio_track.has_value() && !supported_audio_tracks.contains_slow(*preferred_audio_track))
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preferred_audio_track = {};
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auto duration = demuxer->total_duration().value_or(AK::Duration::zero());
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auto start_time_realtime = demuxer->start_time_realtime();
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main_thread_event_loop.deferred_invoke([self, video_tracks = move(supported_video_tracks), video_track_datas = move(supported_video_track_datas), preferred_video_track, audio_tracks = move(supported_audio_tracks), audio_track_datas = move(supported_audio_track_datas), preferred_audio_track, duration, start_time_realtime] mutable {
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if (!self)
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return;
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for (auto const& existing_track : self->m_video_tracks) {
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if (video_tracks.contains_slow(existing_track)) {
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self->on_unsupported_format_error(DecoderError::with_description(DecoderErrorCategory::Invalid, "Duplicate video track found"sv));
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return;
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}
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}
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for (auto const& existing_track : self->m_audio_tracks) {
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if (audio_tracks.contains_slow(existing_track)) {
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self->on_unsupported_format_error(DecoderError::with_description(DecoderErrorCategory::Invalid, "Duplicate audio track found"sv));
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return;
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}
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}
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auto first_new_video_index = self->m_video_tracks.size();
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auto first_new_audio_index = self->m_audio_tracks.size();
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self->m_video_tracks.extend(move(video_tracks));
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self->m_video_track_datas.extend(move(video_track_datas));
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self->m_audio_tracks.extend(move(audio_tracks));
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self->m_audio_track_datas.extend(move(audio_track_datas));
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if (!self->m_preferred_video_track.has_value())
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self->m_preferred_video_track = preferred_video_track;
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if (!self->m_preferred_audio_track.has_value())
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self->m_preferred_audio_track = preferred_audio_track;
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self->m_start_time_realtime = start_time_realtime;
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self->check_for_duration_change(duration);
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self->set_up_producers();
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if (!self->m_audio_output_disabled && !self->m_audio_sink && !self->m_audio_tracks.is_empty()) {
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self->m_audio_mixer = MUST(AudioMixer::try_create());
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self->m_audio_sink = MUST(AudioPlaybackSink::try_create(
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[self](PipelineStatus status) {
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if (!self)
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return;
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self->on_audio_sink_state_changed(status);
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}));
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MUST(self->m_audio_sink->connect_input(*self->m_audio_mixer));
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self->set_time_provider(*self->m_audio_sink);
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self->m_audio_sink->on_audio_output_error = [self](Error&& error) {
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if (!self)
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return;
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dbgln("Audio output initialization failed with error: {}", error);
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self->disable_audio();
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};
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}
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if (self->on_track_added) {
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for (size_t i = first_new_audio_index; i < self->m_audio_tracks.size(); i++)
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self->on_track_added(self->m_audio_tracks[i]);
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for (size_t i = first_new_video_index; i < self->m_video_tracks.size(); i++)
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self->on_track_added(self->m_video_tracks[i]);
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}
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if (self->on_metadata_parsed)
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self->on_metadata_parsed();
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});
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return {};
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}
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NonnullOwnPtr<PlaybackManager> PlaybackManager::create()
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{
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auto playback_manager = adopt_own(*new (nothrow) PlaybackManager());
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playback_manager->m_handler = make<StartingStateHandler>(*playback_manager);
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playback_manager->m_handler->on_enter();
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return playback_manager;
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}
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PlaybackManager::PlaybackManager()
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: m_weak_link(make_ref_counted<WeakPlaybackManagerLink>(*this))
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, m_time_provider(make_ref_counted<GenericTimeProvider>())
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{
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}
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PlaybackManager::~PlaybackManager()
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{
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m_time_provider->pause();
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m_weak_link->revoke({});
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}
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static void handle_media_init_error(WeakPlaybackManager self, Core::EventLoop& main_thread_event_loop, DecoderError error)
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{
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main_thread_event_loop.deferred_invoke([self = move(self), error = move(error)] mutable {
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if (!self)
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return;
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if (self->on_unsupported_format_error)
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self->on_unsupported_format_error(move(error));
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});
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}
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void PlaybackManager::add_media_source(NonnullRefPtr<MediaStream> const& stream)
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{
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auto self = weak();
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auto& main_thread_event_loop = Core::EventLoop::current();
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Threading::ThreadPool::the().submit([self = move(self), stream, &main_thread_event_loop] mutable {
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auto demuxer_or_error = create_demuxer_for_stream(stream);
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if (demuxer_or_error.is_error()) {
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handle_media_init_error(move(self), main_thread_event_loop, demuxer_or_error.release_error());
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return;
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}
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auto maybe_error = prepare_playback_from_demuxer(self, demuxer_or_error.release_value(), main_thread_event_loop);
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if (maybe_error.is_error())
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handle_media_init_error(move(self), main_thread_event_loop, maybe_error.release_error());
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});
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}
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void PlaybackManager::add_media_source(NonnullRefPtr<Demuxer> const& demuxer)
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{
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auto self = weak();
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auto& main_thread_event_loop = Core::EventLoop::current();
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Threading::ThreadPool::the().submit([self = move(self), demuxer, &main_thread_event_loop] mutable {
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auto maybe_error = prepare_playback_from_demuxer(self, demuxer, main_thread_event_loop);
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if (maybe_error.is_error())
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handle_media_init_error(move(self), main_thread_event_loop, maybe_error.release_error());
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});
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}
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WeakPlaybackManager PlaybackManager::weak()
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{
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return WeakPlaybackManager(m_weak_link);
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}
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void PlaybackManager::set_up_producers()
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{
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for (auto const& video_track_data : m_video_track_datas) {
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video_track_data.producer->set_error_handler([self = weak()](DecoderError&& error) {
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if (!self)
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return;
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self->dispatch_error(move(error));
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});
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video_track_data.producer->set_duration_change_handler([self = weak()](AK::Duration time) {
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if (!self)
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return;
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self->check_for_duration_change(time);
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});
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}
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for (auto const& audio_track_data : m_audio_track_datas) {
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audio_track_data.producer->set_error_handler([self = weak()](DecoderError&& error) {
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if (!self)
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return;
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self->dispatch_error(move(error));
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});
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audio_track_data.producer->set_duration_change_handler([self = weak()](AK::Duration time) {
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if (!self)
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return;
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self->check_for_duration_change(time);
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});
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}
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}
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void PlaybackManager::on_audio_sink_state_changed(PipelineStatus status)
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{
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m_audio_buffering = status == PipelineStatus::Blocked;
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update_buffering_state();
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m_handler->on_audio_sink_state_changed(status);
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}
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void PlaybackManager::on_video_sink_state_changed(Track const& track, PipelineStatus status)
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{
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if (status == PipelineStatus::Blocked) {
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if (m_video_tracks_buffering.set(track) == HashSetResult::InsertedNewEntry)
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update_buffering_state();
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} else {
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if (m_video_tracks_buffering.remove(track))
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update_buffering_state();
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}
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m_handler->on_video_sink_state_changed(track, status);
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}
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void PlaybackManager::update_buffering_state()
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{
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auto is_buffering = m_audio_buffering || !m_video_tracks_buffering.is_empty();
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if (is_buffering == m_was_buffering)
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return;
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m_was_buffering = is_buffering;
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if (is_buffering)
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m_handler->enter_buffering();
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else
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m_handler->exit_buffering();
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}
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void PlaybackManager::check_for_duration_change(AK::Duration duration)
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{
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if (m_duration >= duration)
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return;
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m_duration = duration;
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if (on_duration_change)
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on_duration_change(m_duration);
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}
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void PlaybackManager::dispatch_error(DecoderError&& error)
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{
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VERIFY(error.category() != DecoderErrorCategory::EndOfStream);
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if (m_is_in_error_state)
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return;
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m_is_in_error_state = true;
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if (on_error)
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on_error(move(error));
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}
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void PlaybackManager::set_time_provider(NonnullRefPtr<MediaTimeProvider> const& provider)
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{
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auto time = current_time();
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provider->seek(time);
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m_time_provider = provider;
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for (auto& track_data : m_video_track_datas) {
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if (!track_data.display)
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continue;
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track_data.display->set_time_provider(provider);
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}
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if (is_playing())
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provider->resume();
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}
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void PlaybackManager::disable_audio()
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{
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m_audio_buffering = false;
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m_audio_mixer = nullptr;
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m_audio_sink = nullptr;
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set_time_provider(make_ref_counted<GenericTimeProvider>());
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on_audio_sink_state_changed(PipelineStatus::EndOfStream);
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}
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NonnullRefPtr<DisplayingVideoSink> PlaybackManager::get_or_create_the_displaying_video_sink_for_track(Track const& track)
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{
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auto& track_data = get_video_data_for_track(track);
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if (track_data.display == nullptr) {
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auto display = MUST(Media::DisplayingVideoSink::try_create(m_time_provider,
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[self = weak(), track](PipelineStatus status) {
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if (!self)
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return;
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self->on_video_sink_state_changed(track, status);
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}));
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MUST(display->connect_input(track_data.producer));
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track_data.display = move(display);
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}
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return *track_data.display;
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}
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void PlaybackManager::remove_the_displaying_video_sink_for_track(Track const& track)
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{
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auto& track_data = get_video_data_for_track(track);
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VERIFY(track_data.display);
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track_data.display->disconnect_input(track_data.producer);
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track_data.display = nullptr;
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on_video_sink_state_changed(track, PipelineStatus::EndOfStream);
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}
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void PlaybackManager::enable_an_audio_track(Track const& track)
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{
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auto& track_data = get_audio_data_for_track(track);
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VERIFY(!track_data.enabled);
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if (m_audio_mixer)
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MUST(m_audio_mixer->connect_input(track_data.producer));
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track_data.enabled = true;
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}
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void PlaybackManager::disable_an_audio_track(Track const& track)
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{
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auto& track_data = get_audio_data_for_track(track);
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VERIFY(track_data.enabled);
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if (m_audio_mixer)
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m_audio_mixer->disconnect_input(track_data.producer);
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track_data.enabled = false;
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}
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bool PlaybackManager::track_is_enabled(Track const& track) const
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{
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if (track.type() == TrackType::Video) {
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auto const& track_data = get_video_data_for_track(track);
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return track_data.display != nullptr;
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}
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VERIFY(track.type() == TrackType::Audio);
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auto const& track_data = get_audio_data_for_track(track);
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return track_data.enabled;
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}
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void PlaybackManager::start()
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{
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m_handler->start();
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}
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void PlaybackManager::play()
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{
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m_handler->play();
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}
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void PlaybackManager::pause()
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{
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m_handler->pause();
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}
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void PlaybackManager::seek(AK::Duration timestamp, SeekMode mode)
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{
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if (!m_is_in_error_state && current_time() == timestamp)
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return;
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m_handler->seek(timestamp, mode);
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m_is_in_error_state = false;
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}
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bool PlaybackManager::is_playing()
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{
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return m_handler->is_playing();
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}
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PlaybackState PlaybackManager::state()
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{
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return m_handler->state();
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}
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AvailableData PlaybackManager::available_data()
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{
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return m_handler->available_data();
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}
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TimeRanges PlaybackManager::buffered_time_ranges() const
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{
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TimeRanges intersection { { AK::Duration::zero(), m_duration } };
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auto intersect_ranges = [&](auto const& track_datas) {
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for (auto const& track_data : track_datas) {
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if (!track_is_enabled(track_data.track))
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continue;
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auto range = track_data.producer->buffered_time_ranges();
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intersection = intersection.intersection(range);
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}
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};
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intersect_ranges(m_video_track_datas);
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intersect_ranges(m_audio_track_datas);
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return intersection;
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}
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void PlaybackManager::set_volume(double volume)
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{
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if (m_audio_sink)
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m_audio_sink->set_volume(volume);
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}
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}
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