Save last camera image as a placeholder.

Telegram/SourceFiles/history/view/controls/history_view_voice_record_bar.cpp

@@ -30,6 +30,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "media/player/media_player_instance.h"
 #include "media/streaming/media_streaming_instance.h"
 #include "media/streaming/media_streaming_round_preview.h"
+#include "storage/storage_account.h"
 #include "ui/controls/round_video_recorder.h"
 #include "ui/controls/send_button.h"
 #include "ui/effects/animation_value.h"
@@ -2362,7 +2363,13 @@ bool VoiceRecordBar::createVideoRecorder() {
 			.hidden = hidden,
 			.capturer = std::move(capturer),
 			.track = std::move(track),
+			.placeholder = _show->session().local().readRoundPlaceholder(),
 		});
+	_videoRecorder->placeholderUpdates(
+	) | rpl::start_with_next([=](QImage &&placeholder) {
+		_show->session().local().writeRoundPlaceholder(placeholder);
+	}, _videoCapturerLifetime);
+
 	return true;
 }
 

Telegram/SourceFiles/storage/storage_account.cpp

@@ -94,6 +94,7 @@ enum { // Local Storage Keys
 	lskCustomEmojiKeys = 0x17, // no data
 	lskSearchSuggestions = 0x18, // no data
 	lskWebviewTokens = 0x19, // data: QByteArray bots, QByteArray other
+	lskRoundPlaceholder = 0x1a, // no data
 };
 
 auto EmptyMessageDraftSources()
@@ -220,6 +221,7 @@ base::flat_set<QString> Account::collectGoodNames() const {
 		_featuredCustomEmojiKey,
 		_archivedCustomEmojiKey,
 		_searchSuggestionsKey,
+		_roundPlaceholderKey,
 	};
 	auto result = base::flat_set<QString>{
 		"map0",
@@ -306,6 +308,7 @@ Account::ReadMapResult Account::readMapWith(
 	quint64 legacyBackgroundKeyDay = 0, legacyBackgroundKeyNight = 0;
 	quint64 userSettingsKey = 0, recentHashtagsAndBotsKey = 0, exportSettingsKey = 0;
 	quint64 searchSuggestionsKey = 0;
+	quint64 roundPlaceholderKey = 0;
 	QByteArray webviewStorageTokenBots, webviewStorageTokenOther;
 	while (!map.stream.atEnd()) {
 		quint32 keyType;
@@ -415,6 +418,9 @@ Account::ReadMapResult Account::readMapWith(
 		case lskSearchSuggestions: {
 			map.stream >> searchSuggestionsKey;
 		} break;
+		case lskRoundPlaceholder: {
+			map.stream >> roundPlaceholderKey;
+		} break;
 		case lskWebviewTokens: {
 			map.stream
 				>> webviewStorageTokenBots
@@ -456,6 +462,7 @@ Account::ReadMapResult Account::readMapWith(
 	_recentHashtagsAndBotsKey = recentHashtagsAndBotsKey;
 	_exportSettingsKey = exportSettingsKey;
 	_searchSuggestionsKey = searchSuggestionsKey;
+	_roundPlaceholderKey = roundPlaceholderKey;
 	_oldMapVersion = mapData.version;
 	_webviewStorageIdBots.token = webviewStorageTokenBots;
 	_webviewStorageIdOther.token = webviewStorageTokenOther;
@@ -570,6 +577,7 @@ void Account::writeMap() {
 			+ Serialize::bytearraySize(_webviewStorageIdBots.token)
 			+ Serialize::bytearraySize(_webviewStorageIdOther.token);
 	}
+	if (_roundPlaceholderKey) mapSize += sizeof(quint32) + sizeof(quint64);
 
 	EncryptedDescriptor mapData(mapSize);
 	if (!self.isEmpty()) {
@@ -640,6 +648,10 @@ void Account::writeMap() {
 			<< _webviewStorageIdBots.token
 			<< _webviewStorageIdOther.token;
 	}
+	if (_roundPlaceholderKey) {
+		mapData.stream << quint32(lskRoundPlaceholder);
+		mapData.stream << quint64(_roundPlaceholderKey);
+	}
 	map.writeEncrypted(mapData, _localKey);
 
 	_mapChanged = false;
@@ -669,6 +681,7 @@ void Account::reset() {
 	_legacyBackgroundKeyDay = _legacyBackgroundKeyNight = 0;
 	_settingsKey = _recentHashtagsAndBotsKey = _exportSettingsKey = 0;
 	_searchSuggestionsKey = 0;
+	_roundPlaceholderKey = 0;
 	_oldMapVersion = 0;
 	_fileLocations.clear();
 	_fileLocationPairs.clear();
@@ -3178,6 +3191,52 @@ Webview::StorageId Account::resolveStorageIdOther() {
 	return _webviewStorageIdOther;
 }
 
+QImage Account::readRoundPlaceholder() {
+	if (!_roundPlaceholder.isNull()) {
+		return _roundPlaceholder;
+	} else if (!_roundPlaceholderKey) {
+		return QImage();
+	}
+
+	FileReadDescriptor placeholder;
+	if (!ReadEncryptedFile(
+			placeholder,
+			_roundPlaceholderKey,
+			_basePath,
+			_localKey)) {
+		ClearKey(_roundPlaceholderKey, _basePath);
+		_roundPlaceholderKey = 0;
+		writeMapDelayed();
+		return QImage();
+	}
+
+	auto bytes = QByteArray();
+	placeholder.stream >> bytes;
+	_roundPlaceholder = Images::Read({ .content = bytes }).image;
+	return _roundPlaceholder;
+}
+
+void Account::writeRoundPlaceholder(const QImage &placeholder) {
+	if (placeholder.isNull()) {
+		return;
+	}
+	_roundPlaceholder = placeholder;
+
+	auto bytes = QByteArray();
+	auto buffer = QBuffer(&bytes);
+	placeholder.save(&buffer, "JPG", 87);
+
+	quint32 size = Serialize::bytearraySize(bytes);
+	if (!_roundPlaceholderKey) {
+		_roundPlaceholderKey = GenerateKey(_basePath);
+		writeMapQueued();
+	}
+	EncryptedDescriptor data(size);
+	data.stream << bytes;
+	FileWriteDescriptor file(_roundPlaceholderKey, _basePath);
+	file.writeEncrypted(data, _localKey);
+}
+
 bool Account::encrypt(
 		const void *src,
 		void *dst,

Telegram/SourceFiles/storage/storage_account.h

@@ -174,6 +174,9 @@ public:
 	[[nodiscard]] Webview::StorageId resolveStorageIdBots();
 	[[nodiscard]] Webview::StorageId resolveStorageIdOther();
 
+	[[nodiscard]] QImage readRoundPlaceholder();
+	void writeRoundPlaceholder(const QImage &placeholder);
+
 	[[nodiscard]] bool encrypt(
 		const void *src,
 		void *dst,
@@ -302,6 +305,7 @@ private:
 	FileKey _featuredCustomEmojiKey = 0;
 	FileKey _archivedCustomEmojiKey = 0;
 	FileKey _searchSuggestionsKey = 0;
+	FileKey _roundPlaceholderKey = 0;
 
 	qint64 _cacheTotalSizeLimit = 0;
 	qint64 _cacheBigFileTotalSizeLimit = 0;
@@ -325,6 +329,8 @@ private:
 	bool _mapChanged = false;
 	bool _locationsChanged = false;
 
+	QImage _roundPlaceholder;
+
 };
 
 [[nodiscard]] Webview::StorageId TonSiteStorageId();

Telegram/SourceFiles/ui/controls/round_video_recorder.cpp

@@ -1052,6 +1052,10 @@ Fn<void(Media::Capture::Chunk)> RoundVideoRecorder::audioChunkProcessor() {
 	};
 }
 
+rpl::producer<QImage> RoundVideoRecorder::placeholderUpdates() const {
+	return _placeholderUpdates.events();
+}
+
 int RoundVideoRecorder::previewSize() const {
 	return _side;
 }
@@ -1096,6 +1100,31 @@ void RoundVideoRecorder::progressTo(float64 progress) {
 	_preview->update();
 }
 
+void RoundVideoRecorder::preparePlaceholder(const QImage &placeholder) {
+	const auto ratio = style::DevicePixelRatio();
+	const auto full = QSize(_side, _side) * ratio;
+	if (!placeholder.isNull()) {
+		_framePlaceholder = Images::Circle(
+			placeholder.scaled(
+				full,
+				Qt::KeepAspectRatio,
+				Qt::SmoothTransformation));
+		_framePlaceholder.setDevicePixelRatio(ratio);
+	} else {
+		_framePlaceholder = QImage(
+			full,
+			QImage::Format_ARGB32_Premultiplied);
+		_framePlaceholder.fill(Qt::transparent);
+		_framePlaceholder.setDevicePixelRatio(ratio);
+
+		auto p = QPainter(&_framePlaceholder);
+		auto hq = PainterHighQualityEnabler(p);
+		p.setPen(Qt::NoPen);
+		p.setBrush(Qt::black);
+		p.drawEllipse(0, 0, _side, _side);
+	}
+}
+
 void RoundVideoRecorder::prepareFrame(bool blurred) {
 	if (_frameOriginal.isNull()) {
 		return;
@@ -1124,18 +1153,14 @@ void RoundVideoRecorder::prepareFrame(bool blurred) {
 	const auto ratio = style::DevicePixelRatio();
 	if (blurred) {
 		static constexpr auto kRadius = 16;
-		_framePlaceholder = Images::Circle(
-			Images::BlurLargeImage(
-				copy.scaled(
-					QSize(kBlurredSize, kBlurredSize),
-					Qt::KeepAspectRatio,
-					Qt::FastTransformation),
-				kRadius
-			).scaled(
-				QSize(_side, _side) * ratio,
+		auto image = Images::BlurLargeImage(
+			copy.scaled(
+				QSize(kBlurredSize, kBlurredSize),
 				Qt::KeepAspectRatio,
-				Qt::SmoothTransformation));
-		_framePlaceholder.setDevicePixelRatio(ratio);
+				Qt::FastTransformation),
+			kRadius);
+		preparePlaceholder(image);
+		_placeholderUpdates.fire(std::move(image));
 	} else {
 		_framePrepared = Images::Circle(copy.scaled(
 			QSize(_side, _side) * ratio,
@@ -1147,17 +1172,7 @@ void RoundVideoRecorder::prepareFrame(bool blurred) {
 
 void RoundVideoRecorder::createImages() {
 	const auto ratio = style::DevicePixelRatio();
-	_framePlaceholder = QImage(
-		QSize(_side, _side) * ratio,
-		QImage::Format_ARGB32_Premultiplied);
-	_framePlaceholder.fill(Qt::transparent);
-	_framePlaceholder.setDevicePixelRatio(ratio);
-	auto p = QPainter(&_framePlaceholder);
-	auto hq = PainterHighQualityEnabler(p);
-
-	p.setPen(Qt::NoPen);
-	p.setBrush(Qt::black);
-	p.drawEllipse(0, 0, _side, _side);
+	preparePlaceholder(_descriptor.placeholder);
 
 	const auto side = _side + 2 * _extent;
 	_shadow = QImage(

Telegram/SourceFiles/ui/controls/round_video_recorder.h

@@ -38,6 +38,7 @@ struct RoundVideoRecorderDescriptor {
 	Fn<void(not_null<RoundVideoRecorder*>)> hidden;
 	std::shared_ptr<tgcalls::VideoCaptureInterface> capturer;
 	std::shared_ptr<Webrtc::VideoTrack> track;
+	QImage placeholder;
 };
 
 struct RoundVideoResult {
@@ -62,6 +63,7 @@ public:
 
 	[[nodiscard]] int previewSize() const;
 	[[nodiscard]] Fn<void(Media::Capture::Chunk)> audioChunkProcessor();
+	[[nodiscard]] rpl::producer<QImage> placeholderUpdates() const;
 
 	void pause(Fn<void(RoundVideoResult)> done = nullptr);
 	void resume(RoundVideoPartial partial);
@@ -84,6 +86,7 @@ private:
 
 	void setup();
 	void prepareFrame(bool blurred = false);
+	void preparePlaceholder(const QImage &placeholder);
 	void createImages();
 	void progressTo(float64 progress);
 	void fade(bool visible);
@@ -100,6 +103,7 @@ private:
 	Ui::Animations::Simple _progressAnimation;
 	Ui::Animations::Simple _fadeAnimation;
 	Ui::Animations::Simple _fadeContentAnimation;
+	rpl::event_stream<QImage> _placeholderUpdates;
 
 	std::shared_ptr<Ui::DynamicImage> _silentPreview;
 	std::shared_ptr<Ui::DynamicImage> _soundedPreview;