From 0991e7d8a4a0b94a9199a93a5aea9bf8c7ed1b08 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Fri, 25 Oct 2024 21:01:44 +0400
Subject: [PATCH] Mirror recorded round message.

---
 Telegram/Resources/art/round_placeholder.jpg  | Bin 0 -> 787 bytes
 Telegram/Resources/qrc/telegram/telegram.qrc  |   1 +
 .../ui/controls/round_video_recorder.cpp      |  46 ++++++++++--------
 3 files changed, 27 insertions(+), 20 deletions(-)
 create mode 100644 Telegram/Resources/art/round_placeholder.jpg

diff --git a/Telegram/Resources/art/round_placeholder.jpg b/Telegram/Resources/art/round_placeholder.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..cbdc9aee39c6eceacebf68a0459a84a54118502e
GIT binary patch
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diff --git a/Telegram/Resources/qrc/telegram/telegram.qrc b/Telegram/Resources/qrc/telegram/telegram.qrc
index 09f8b0fac..7e035ba54 100644
--- a/Telegram/Resources/qrc/telegram/telegram.qrc
+++ b/Telegram/Resources/qrc/telegram/telegram.qrc
@@ -7,6 +7,7 @@
     <file alias="art/logo_256.png">../../art/logo_256.png</file>
     <file alias="art/logo_256_no_margin.png">../../art/logo_256_no_margin.png</file>
     <file alias="art/themeimage.jpg">../../art/themeimage.jpg</file>
+    <file alias="art/round_placeholder.jpg">../../art/round_placeholder.jpg</file>
     <file alias="day-blue.tdesktop-theme">../../day-blue.tdesktop-theme</file>
     <file alias="night.tdesktop-theme">../../night.tdesktop-theme</file>
     <file alias="night-green.tdesktop-theme">../../night-green.tdesktop-theme</file>
diff --git a/Telegram/SourceFiles/ui/controls/round_video_recorder.cpp b/Telegram/SourceFiles/ui/controls/round_video_recorder.cpp
index 0009f6214..f01df2165 100644
--- a/Telegram/SourceFiles/ui/controls/round_video_recorder.cpp
+++ b/Telegram/SourceFiles/ui/controls/round_video_recorder.cpp
@@ -143,6 +143,7 @@ private:
 	void updateMaxLevel(const Media::Capture::Chunk &chunk);
 	void updateResultDuration(int64 pts, AVRational timeBase);
 
+	void mirrorYUV420P(not_null<AVFrame*> frame);
 	void cutCircleFromYUV420P(not_null<AVFrame*> frame);
 
 	[[nodiscard]] RoundVideoResult appendToPrevious(RoundVideoResult video);
@@ -752,6 +753,7 @@ void RoundVideoRecorder::Private::encodeVideoFrame(
 		_videoFrame->data,
 		_videoFrame->linesize);
 
+	mirrorYUV420P(_videoFrame.get());
 	cutCircleFromYUV420P(_videoFrame.get());
 
 	_videoFrame->pts = mcstimestamp - _videoFirstTimestamp;
@@ -836,6 +838,21 @@ void RoundVideoRecorder::Private::initMinithumbsCanvas() {
 	_minithumbs = QImage(width, height, QImage::Format_ARGB32_Premultiplied);
 }
 
+void RoundVideoRecorder::Private::mirrorYUV420P(not_null<AVFrame*> frame) {
+	for (auto p = 0; p < 3; ++p) {
+		const auto size = p ? (kSide / 2) : kSide;
+		const auto linesize = _videoFrame->linesize[p];
+		auto data = _videoFrame->data[p];
+		for (auto y = 0; y != size; ++y) {
+			auto left = data + y * linesize;
+			auto right = left + size - 1;
+			while (left < right) {
+				std::swap(*left++, *right--);
+			}
+		}
+	}
+}
+
 void RoundVideoRecorder::Private::cutCircleFromYUV420P(
 		not_null<AVFrame*> frame) {
 	const auto width = frame->width;
@@ -1104,26 +1121,14 @@ void RoundVideoRecorder::progressTo(float64 progress) {
 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(
+	_framePlaceholder = Images::Circle(
+		(placeholder.isNull()
+			? QImage(u":/gui/art/round_placeholder.jpg"_q)
+			: 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);
-	}
+	_framePlaceholder.setDevicePixelRatio(ratio);
 }
 
 void RoundVideoRecorder::prepareFrame(bool blurred) {
@@ -1159,14 +1164,15 @@ void RoundVideoRecorder::prepareFrame(bool blurred) {
 				QSize(kBlurredSize, kBlurredSize),
 				Qt::KeepAspectRatio,
 				Qt::FastTransformation),
-			kRadius);
+			kRadius).mirrored(true, false);
 		preparePlaceholder(image);
 		_placeholderUpdates.fire(std::move(image));
 	} else {
-		_framePrepared = Images::Circle(copy.scaled(
+		auto scaled = copy.scaled(
 			QSize(_side, _side) * ratio,
 			Qt::KeepAspectRatio,
-			Qt::SmoothTransformation));
+			Qt::SmoothTransformation).mirrored(true, false);
+		_framePrepared = Images::Circle(std::move(scaled));
 		_framePrepared.setDevicePixelRatio(ratio);
 	}
 }