Add video speed control slider.

Telegram/SourceFiles/main/main_settings.cpp

@@ -23,6 +23,14 @@ constexpr auto kVersionTag = -1;
 constexpr auto kVersion = 1;
 constexpr auto kMaxSavedPlaybackPositions = 16;
 
+[[nodiscard]] qint32 SerializePlaybackSpeed(float64 speed) {
+	return int(std::round(std::clamp(speed * 4., 2., 8.))) - 2;
+}
+
+float64 DeserializePlaybackSpeed(qint32 speed) {
+	return (std::clamp(speed, 0, 6) + 2) / 4.;
+}
+
 } // namespace
 
 Settings::Variables::Variables()
@@ -98,6 +106,7 @@ QByteArray Settings::serialize() const {
 		for (const auto &[id, time] : _variables.mediaLastPlaybackPosition) {
 			stream << quint64(id) << qint64(time);
 		}
+		stream << qint32(SerializePlaybackSpeed(_variables.videoPlaybackSpeed.current()));
 	}
 	return result;
 }
@@ -148,6 +157,7 @@ void Settings::constructFromSerialized(const QByteArray &serialized) {
 	qint32 suggestStickersByEmoji = _variables.suggestStickersByEmoji ? 1 : 0;
 	qint32 spellcheckerEnabled = _variables.spellcheckerEnabled.current() ? 1 : 0;
 	std::vector<std::pair<DocumentId, crl::time>> mediaLastPlaybackPosition;
+	qint32 videoPlaybackSpeed = SerializePlaybackSpeed(_variables.videoPlaybackSpeed.current());
 
 	stream >> versionTag;
 	if (versionTag == kVersionTag) {
@@ -268,6 +278,9 @@ void Settings::constructFromSerialized(const QByteArray &serialized) {
 			}
 		}
 	}
+	if (!stream.atEnd()) {
+		stream >> videoPlaybackSpeed;
+	}
 	if (stream.status() != QDataStream::Ok) {
 		LOG(("App Error: "
 			"Bad data for Main::Settings::constructFromSerialized()"));
@@ -355,6 +368,7 @@ void Settings::constructFromSerialized(const QByteArray &serialized) {
 	_variables.suggestStickersByEmoji = (suggestStickersByEmoji == 1);
 	_variables.spellcheckerEnabled = (spellcheckerEnabled == 1);
 	_variables.mediaLastPlaybackPosition = std::move(mediaLastPlaybackPosition);
+	_variables.videoPlaybackSpeed = DeserializePlaybackSpeed(videoPlaybackSpeed);
 }
 
 void Settings::setSupportChatsTimeSlice(int slice) {

Telegram/SourceFiles/main/main_settings.h

@@ -241,6 +241,13 @@ public:
 		return _variables.spellcheckerEnabled.changes();
 	}
 
+	[[nodiscard]] float64 videoPlaybackSpeed() const {
+		return _variables.videoPlaybackSpeed.current();
+	}
+	void setVideoPlaybackSpeed(float64 speed) {
+		_variables.videoPlaybackSpeed = speed;
+	}
+
 private:
 	struct Variables {
 		Variables();
@@ -281,6 +288,7 @@ private:
 		bool suggestStickersByEmoji = true;
 		rpl::variable<bool> spellcheckerEnabled = true;
 		std::vector<std::pair<DocumentId, crl::time>> mediaLastPlaybackPosition;
+		rpl::variable<float64> videoPlaybackSpeed = 1.;
 
 		static constexpr auto kDefaultSupportChatsLimitSlice
 			= 7 * 24 * 60 * 60;

Telegram/SourceFiles/media/streaming/media_streaming_player.cpp

@@ -958,6 +958,7 @@ void Player::unlock() {
 	--_locks;
 	if (!_locks) {
 		stopAudio();
+		setSpeed(1.);
 		setWaitForMarkAsShown(true);
 	}
 }

Telegram/SourceFiles/media/view/media_view_overlay_widget.cpp

@@ -2361,8 +2361,11 @@ void OverlayWidget::restartAtSeekPosition(crl::time position) {
 	if (!_streamed->withSound) {
 		options.mode = Streaming::Mode::Video;
 		options.loop = true;
-	} else if (_pip) {
-		_pip = nullptr;
+	} else {
+		options.speed = _doc->session().settings().videoPlaybackSpeed();
+		if (_pip) {
+			_pip = nullptr;
+		}
 	}
 	_streamed->instance.play(options);
 	if (_streamingStartPaused) {
@@ -2397,13 +2400,29 @@ void OverlayWidget::playbackControlsVolumeChanged(float64 volume) {
 	Global::SetVideoVolume(volume);
 	updateMixerVideoVolume();
 	Global::RefVideoVolumeChanged().notify();
-	Auth().saveSettingsDelayed();
+	if (_doc) {
+		_doc->session().saveSettingsDelayed();
+	}
 }
 
 float64 OverlayWidget::playbackControlsCurrentVolume() {
 	return Global::VideoVolume();
 }
 
+void OverlayWidget::playbackControlsSpeedChanged(float64 speed) {
+	if (_doc) {
+		_doc->session().settings().setVideoPlaybackSpeed(speed);
+		_doc->session().saveSettingsDelayed();
+	}
+	if (_streamed && !videoIsGifv()) {
+		_streamed->instance.setSpeed(speed);
+	}
+}
+
+float64 OverlayWidget::playbackControlsCurrentSpeed() {
+	return _doc ? _doc->session().settings().videoPlaybackSpeed() : 1.;
+}
+
 void OverlayWidget::switchToPip() {
 	const auto document = _doc;
 	const auto msgId = _msgid;

Telegram/SourceFiles/media/view/media_view_overlay_widget.h

@@ -172,6 +172,8 @@ private:
 	void playbackControlsSeekFinished(crl::time position) override;
 	void playbackControlsVolumeChanged(float64 volume) override;
 	float64 playbackControlsCurrentVolume() override;
+	void playbackControlsSpeedChanged(float64 speed);
+	float64 playbackControlsCurrentSpeed() override;
 	void playbackControlsToFullScreen() override;
 	void playbackControlsFromFullScreen() override;
 	void playbackControlsToPictureInPicture() override;

Telegram/SourceFiles/media/view/media_view_pip.cpp

@@ -11,6 +11,9 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "media/streaming/media_streaming_document.h"
 #include "media/streaming/media_streaming_utility.h"
 #include "media/audio/media_audio.h"
+#include "main/main_session.h"
+#include "main/main_settings.h"
+#include "data/data_document.h"
 #include "core/application.h"
 #include "ui/platform/ui_platform_utility.h"
 #include "ui/widgets/buttons.h"
@@ -721,6 +724,9 @@ void Pip::restartAtSeekPosition(crl::time position) {
 	auto options = Streaming::PlaybackOptions();
 	options.position = position;
 	options.audioId = _instance.player().prepareLegacyState().id;
+	options.speed = options.audioId.audio()
+		? options.audioId.audio()->session().settings().videoPlaybackSpeed()
+		: 1.;
 	_instance.play(options);
 	updatePlaybackState();
 }

Telegram/SourceFiles/media/view/media_view_playback_controls.cpp

@@ -30,6 +30,7 @@ PlaybackControls::PlaybackControls(
 , _playbackSlider(this, st::mediaviewPlayback)
 , _playbackProgress(std::make_unique<PlaybackProgress>())
 , _volumeController(this, st::mediaviewPlayback)
+, _speedController(this, st::mediaviewPlayback)
 , _fullScreenToggle(this, st::mediaviewFullScreenButton)
 , _pictureInPicture(this, st::mediaviewFullScreenButton)
 , _playedAlready(this, st::mediaviewPlayProgressLabel)
@@ -54,6 +55,12 @@ PlaybackControls::PlaybackControls(
 	_volumeController->setChangeProgressCallback([=](float64 value) {
 		_delegate->playbackControlsVolumeChanged(value);
 	});
+	_speedController->setPseudoDiscrete(
+		7,
+		[=](int index) { return (index + 2) / 4.; },
+		_delegate->playbackControlsCurrentSpeed(),
+		[=](float64 speed) { _delegate->playbackControlsSpeedChanged(speed); });
+	_speedController->setAlwaysDisplayMarker(false);
 
 	_playPauseResume->addClickHandler([=] {
 		if (_showPause) {
@@ -121,6 +128,7 @@ void PlaybackControls::startFading(Callback start) {
 		showChildren();
 		_playbackSlider->disablePaint(true);
 		_volumeController->disablePaint(true);
+		_speedController->disablePaint(true);
 		_childrenHidden = false;
 	}
 	start();
@@ -128,7 +136,8 @@ void PlaybackControls::startFading(Callback start) {
 		for (const auto child : children()) {
 			if (child->isWidgetType()
 				&& child != _playbackSlider
-				&& child != _volumeController) {
+				&& child != _volumeController
+				&& child != _speedController) {
 				static_cast<QWidget*>(child)->hide();
 			}
 		}
@@ -138,6 +147,7 @@ void PlaybackControls::startFading(Callback start) {
 	}
 	_playbackSlider->disablePaint(false);
 	_volumeController->disablePaint(false);
+	_speedController->disablePaint(false);
 }
 
 void PlaybackControls::showAnimated() {
@@ -159,6 +169,7 @@ void PlaybackControls::fadeFinished() {
 void PlaybackControls::fadeUpdated(float64 opacity) {
 	_playbackSlider->setFadeOpacity(opacity);
 	_volumeController->setFadeOpacity(opacity);
+	_speedController->setFadeOpacity(opacity);
 }
 
 void PlaybackControls::updatePlayback(const Player::TrackState &state) {
@@ -306,8 +317,12 @@ void PlaybackControls::resizeEvent(QResizeEvent *e) {
 
 	_pictureInPicture->moveToLeft(left, playTop);
 
+	const auto volumeTop = playTop + (_fullScreenToggle->height() - _volumeController->height()) / 2;
 	_volumeController->resize(st::mediaviewVolumeWidth, st::mediaviewPlayback.seekSize.height());
-	_volumeController->moveToRight(skip, playTop + (_fullScreenToggle->height() - _volumeController->height()) / 2);
+	_volumeController->moveToRight(skip, volumeTop);
+
+	_speedController->resize(st::mediaviewVolumeWidth, st::mediaviewPlayback.seekSize.height());
+	_speedController->moveToRight(skip + _volumeController->width() + skip, volumeTop);
 }
 
 void PlaybackControls::paintEvent(QPaintEvent *e) {
@@ -320,6 +335,7 @@ void PlaybackControls::paintEvent(QPaintEvent *e) {
 		showChildren();
 		_playbackSlider->setFadeOpacity(1.);
 		_volumeController->setFadeOpacity(1.);
+		_speedController->setFadeOpacity(1.);
 		_childrenHidden = false;
 	}
 	App::roundRect(p, rect(), st::mediaviewSaveMsgBg, MediaviewSaveCorners);

Telegram/SourceFiles/media/view/media_view_playback_controls.h

@@ -36,6 +36,8 @@ public:
 		virtual void playbackControlsSeekFinished(crl::time position) = 0;
 		virtual void playbackControlsVolumeChanged(float64 volume) = 0;
 		[[nodiscard]] virtual float64 playbackControlsCurrentVolume() = 0;
+		virtual void playbackControlsSpeedChanged(float64 speed) = 0;
+		[[nodiscard]] virtual float64 playbackControlsCurrentSpeed() = 0;
 		virtual void playbackControlsToFullScreen() = 0;
 		virtual void playbackControlsFromFullScreen() = 0;
 		virtual void playbackControlsToPictureInPicture() = 0;
@@ -90,6 +92,7 @@ private:
 	std::unique_ptr<PlaybackProgress> _playbackProgress;
 	std::unique_ptr<PlaybackProgress> _receivedTillProgress;
 	object_ptr<Ui::MediaSlider> _volumeController;
+	object_ptr<Ui::MediaSlider> _speedController;
 	object_ptr<Ui::IconButton> _fullScreenToggle;
 	object_ptr<Ui::IconButton> _pictureInPicture;
 	object_ptr<Ui::LabelSimple> _playedAlready;