Show mini-thumbnails when pausing recording.

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

@@ -203,6 +203,44 @@ void PaintWaveform(
 	}
 }
 
+void FillWithMinithumbs(
+		QPainter &p,
+		not_null<const Ui::RoundVideoResult*> data,
+		QRect rect,
+		float64 progress) {
+	if (!data->minithumbsCount || !data->minithumbSize || rect.isEmpty()) {
+		return;
+	}
+	const auto size = rect.height();
+	const auto single = data->minithumbSize;
+	const auto perrow = data->minithumbs.width() / single;
+	const auto thumbs = (rect.width() + size - 1) / size;
+	if (!thumbs || !perrow) {
+		return;
+	}
+	for (auto i = 0; i != thumbs - 1; ++i) {
+		const auto index = (i * data->minithumbsCount) / thumbs;
+		p.drawImage(
+			QRect(rect.x() + i * size, rect.y(), size, size),
+			data->minithumbs,
+			QRect(
+				(index % perrow) * single,
+				(index / perrow) * single,
+				single,
+				single));
+	}
+	const auto last = rect.width() - (thumbs - 1) * size;
+	const auto index = ((thumbs - 1) * data->minithumbsCount) / thumbs;
+	p.drawImage(
+		QRect(rect.x() + (thumbs - 1) * size, rect.y(), last, size),
+		data->minithumbs,
+		QRect(
+			(index % perrow) * single,
+			(index / perrow) * single,
+			(last * single) / size,
+			single));
+}
+
 [[nodiscard]] QRect DrawLockCircle(
 		QPainter &p,
 		const QRect &widgetRect,
@@ -428,7 +466,7 @@ public:
 		not_null<Ui::RpWidget*> parent,
 		const style::RecordBar &st,
 		not_null<Main::Session*> session,
-		::Media::Capture::Result *data,
+		not_null<Ui::RoundVideoResult*> data,
 		const style::font &font);
 
 	void requestPaintProgress(float64 progress);
@@ -456,7 +494,7 @@ private:
 	const not_null<DocumentData*> _document;
 	const std::unique_ptr<VoiceData> _voiceData;
 	const std::shared_ptr<Data::DocumentMedia> _mediaView;
-	const not_null<::Media::Capture::Result*> _data;
+	const not_null<Ui::RoundVideoResult*> _data;
 	const base::unique_qptr<Ui::IconButton> _delete;
 	const style::font &_durationFont;
 	const QString _duration;
@@ -486,7 +524,7 @@ ListenWrap::ListenWrap(
 	not_null<Ui::RpWidget*> parent,
 	const style::RecordBar &st,
 	not_null<Main::Session*> session,
-	::Media::Capture::Result *data,
+	not_null<Ui::RoundVideoResult*> data,
 	const style::font &font)
 : _parent(parent)
 , _st(st)
@@ -604,20 +642,27 @@ void ListenWrap::init() {
 			}
 
 			// Waveform paint.
-			{
-				const auto rect = (progress == 1.)
-					? _waveformFgRect
-					: computeWaveformRect(bgCenterRect);
-				if (rect.width() > 0) {
-					p.translate(rect.topLeft());
+			const auto waveformRect = (progress == 1.)
+				? _waveformFgRect
+				: computeWaveformRect(bgCenterRect);
+			if (!waveformRect.isEmpty()) {
+				const auto playProgress = _playProgress.current();
+				if (_data->minithumbs.isNull()) {
+					p.translate(waveformRect.topLeft());
 					PaintWaveform(
 						p,
 						_voiceData.get(),
-						rect.width(),
+						waveformRect.width(),
 						_activeWaveformBar,
 						_inactiveWaveformBar,
-						_playProgress.current());
+						playProgress);
 					p.resetTransform();
+				} else {
+					FillWithMinithumbs(
+						p,
+						_data,
+						waveformRect,
+						playProgress);
 				}
 			}
 		}
@@ -631,9 +676,11 @@ void ListenWrap::initPlayButton() {
 	using namespace ::Media::Player;
 	using State = TrackState;
 
-	_mediaView->setBytes(_data->bytes);
-	_document->size = _data->bytes.size();
-	_document->type = _data->video ? RoundVideoDocument : VoiceDocument;
+	_mediaView->setBytes(_data->content);
+	_document->size = _data->content.size();
+	_document->type = _data->minithumbs.isNull()
+		? VoiceDocument
+		: RoundVideoDocument;
 
 	const auto &play = _playPauseSt.playOuter;
 	const auto &width = _waveformBgFinalCenterRect.height();
@@ -1688,10 +1735,7 @@ void VoiceRecordBar::startRecording() {
 			instance()->pause(false, nullptr);
 			if (_videoRecorder) {
 				_videoRecorder->resume({
-					.video = {
-						.content = _data.bytes,
-						.duration = _data.duration,
-					},
+					.video = std::move(_data),
 				});
 			}
 		} else {
@@ -1836,12 +1880,7 @@ void VoiceRecordBar::stopRecording(StopType type, bool ttlBeforeHide) {
 						window()->activateWindow();
 
 						_paused = true;
-						_data = ::Media::Capture::Result{
-							.bytes = std::move(data.content),
-							//.waveform = std::move(data.waveform),
-							.duration = data.duration,
-							.video = true,
-						};
+						_data = std::move(data);
 						_listen = std::make_unique<ListenWrap>(
 							this,
 							_st,
@@ -1861,7 +1900,11 @@ void VoiceRecordBar::stopRecording(StopType type, bool ttlBeforeHide) {
 					return;
 				}
 				_paused = true;
-				_data = std::move(data);
+				_data = Ui::RoundVideoResult{
+					.content = std::move(data.bytes),
+					.waveform = std::move(data.waveform),
+					.duration = data.duration,
+				};
 
 				window()->raise();
 				window()->activateWindow();
@@ -1906,7 +1949,11 @@ void VoiceRecordBar::stopRecording(StopType type, bool ttlBeforeHide) {
 				stop(false);
 				return;
 			}
-			_data = std::move(data);
+			_data = Ui::RoundVideoResult{
+				.content = std::move(data.bytes),
+				.waveform = std::move(data.waveform),
+				.duration = data.duration,
+			};
 
 			window()->raise();
 			window()->activateWindow();
@@ -1916,7 +1963,7 @@ void VoiceRecordBar::stopRecording(StopType type, bool ttlBeforeHide) {
 					: 0),
 			};
 			_sendVoiceRequests.fire({
-				_data.bytes,
+				_data.content,
 				_data.waveform,
 				_data.duration,
 				options,
@@ -1983,7 +2030,7 @@ void VoiceRecordBar::requestToSendWithOptions(Api::SendOptions options) {
 			options.ttlSeconds = std::numeric_limits<int>::max();
 		}
 		_sendVoiceRequests.fire({
-			_data.bytes,
+			_data.content,
 			_data.waveform,
 			_data.duration,
 			options,

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

@@ -11,6 +11,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "base/timer.h"
 #include "history/view/controls/compose_controls_common.h"
 #include "media/audio/media_audio_capture_common.h"
+#include "ui/controls/round_video_recorder.h"
 #include "ui/effects/animations.h"
 #include "ui/round_rect.h"
 #include "ui/rp_widget.h"
@@ -170,7 +171,7 @@ private:
 	std::unique_ptr<Ui::AbstractButton> _ttlButton;
 	std::unique_ptr<ListenWrap> _listen;
 
-	::Media::Capture::Result _data;
+	Ui::RoundVideoResult _data;
 	rpl::variable<bool> _paused;
 
 	base::Timer _startTimer;

Telegram/SourceFiles/ui/controls/round_video_recorder.cpp

@@ -16,6 +16,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/painter.h"
 #include "ui/rp_widget.h"
 #include "webrtc/webrtc_video_track.h"
+#include "styles/style_chat.h"
 #include "styles/style_chat_helpers.h"
 
 namespace Ui {
@@ -30,6 +31,8 @@ constexpr auto kMinDuration = crl::time(200);
 constexpr auto kMaxDuration = 60 * crl::time(1000);
 constexpr auto kInitTimeout = 5 * crl::time(1000);
 constexpr auto kBlurredSize = 64;
+constexpr auto kMinithumbsPerSecond = 5;
+constexpr auto kMinithumbsInRow = 16;
 
 using namespace FFmpeg;
 
@@ -66,11 +69,19 @@ struct ReadBytesWrap {
 	};
 };
 
+[[nodiscard]] int MinithumbSize() {
+	const auto full = st::historySendSize.height();
+	const auto margin = st::historyRecordWaveformBgMargins;
+	const auto outer = full - margin.top() - margin.bottom();
+	const auto inner = outer - 2 * st::msgWaveformMin;
+	return inner * style::DevicePixelRatio();
+}
+
 } // namespace
 
 class RoundVideoRecorder::Private final {
 public:
-	Private(crl::weak_on_queue<Private> weak);
+	Private(crl::weak_on_queue<Private> weak, int minithumbSize);
 	~Private();
 
 	void push(int64 mcstimestamp, const QImage &frame);
@@ -103,6 +114,13 @@ private:
 	int64_t seek(int64_t offset, int whence);
 
 	void initEncoding();
+	void initCircleMask();
+	void initMinithumbsCanvas();
+	void maybeSaveMinithumb(
+		not_null<AVFrame*> frame,
+		const QImage &original,
+		QRect crop);
+
 	bool initVideo();
 	bool initAudio();
 	void notifyFinished();
@@ -122,7 +140,6 @@ private:
 	void updateResultDuration(int64 pts, AVRational timeBase);
 
 	void cutCircleFromYUV420P(not_null<AVFrame*> frame);
-	void initCircleMask();
 
 	[[nodiscard]] RoundVideoResult appendToPrevious(RoundVideoResult video);
 	[[nodiscard]] static FormatPointer OpenInputContext(
@@ -169,6 +186,11 @@ private:
 	crl::time _lastUpdateDuration = 0;
 	rpl::event_stream<Update, Error> _updates;
 
+	crl::time _minithumbNextTimestamp = 0;
+	const int _minithumbSize = 0;
+	int _minithumbsCount = 0;
+	QImage _minithumbs;
+
 	crl::time _maxDuration = 0;
 	RoundVideoResult _previous;
 
@@ -185,12 +207,16 @@ RoundVideoRecorder::Private::CopyContext::CopyContext() {
 	ranges::fill(lastDts, std::numeric_limits<int64>::min());
 }
 
-RoundVideoRecorder::Private::Private(crl::weak_on_queue<Private> weak)
+RoundVideoRecorder::Private::Private(
+	crl::weak_on_queue<Private> weak,
+	int minithumbSize)
 : _weak(std::move(weak))
+, _minithumbSize(minithumbSize)
 , _maxDuration(kMaxDuration)
 , _timeoutTimer(_weak, [=] { timeout(); }) {
 	initEncoding();
 	initCircleMask();
+	initMinithumbsCanvas();
 
 	_timeoutTimer.callOnce(kInitTimeout);
 }
@@ -452,8 +478,11 @@ RoundVideoResult RoundVideoRecorder::Private::finish() {
 	finishEncoding();
 	auto result = appendToPrevious({
 		.content = base::take(_result),
-		.waveform = QByteArray(),
 		.duration = base::take(_resultDuration),
+		//.waveform = {},
+		.minithumbs = base::take(_minithumbs),
+		.minithumbsCount = base::take(_minithumbsCount),
+		.minithumbSize = _minithumbSize,
 	});
 	if (result.duration < kMinDuration) {
 		return {};
@@ -523,11 +552,9 @@ RoundVideoResult RoundVideoRecorder::Private::appendToPrevious(
 		fail(Error::Encoding);
 		return {};
 	}
-	return RoundVideoResult{
-		.content = base::take(_result),
-		.waveform = QByteArray(),
-		.duration = _previous.duration + video.duration,
-	};
+	video.content = base::take(_result);
+	video.duration += _previous.duration;
+	return video;
 }
 
 FormatPointer RoundVideoRecorder::Private::OpenInputContext(
@@ -605,7 +632,11 @@ void RoundVideoRecorder::Private::restart(RoundVideoPartial partial) {
 		return;
 	}
 	_previous = std::move(partial.video);
+	_minithumbs = std::move(_previous.minithumbs);
+	_minithumbsCount = _previous.minithumbsCount;
+	Assert(_minithumbSize == _previous.minithumbSize);
 	_maxDuration = kMaxDuration - _previous.duration;
+	_minithumbNextTimestamp = 0;
 	_finished = false;
 	initEncoding();
 	_timeoutTimer.callOnce(kInitTimeout);
@@ -720,6 +751,7 @@ void RoundVideoRecorder::Private::encodeVideoFrame(
 	cutCircleFromYUV420P(_videoFrame.get());
 
 	_videoFrame->pts = mcstimestamp - _videoFirstTimestamp;
+	maybeSaveMinithumb(_videoFrame.get(), frame, crop);
 	if (_videoFrame->pts >= _maxDuration * int64(1000)) {
 		notifyFinished();
 		return;
@@ -728,6 +760,49 @@ void RoundVideoRecorder::Private::encodeVideoFrame(
 	}
 }
 
+void RoundVideoRecorder::Private::maybeSaveMinithumb(
+		not_null<AVFrame*> frame,
+		const QImage &original,
+		QRect crop) {
+	if (frame->pts < _minithumbNextTimestamp * 1000) {
+		return;
+	}
+	_minithumbNextTimestamp += crl::time(1000) / kMinithumbsPerSecond;
+	const auto perline = original.bytesPerLine();
+	const auto perpixel = original.depth() / 8;
+	const auto cropped = QImage(
+		original.constBits() + (crop.y() * perline) + (crop.x() * perpixel),
+		crop.width(),
+		crop.height(),
+		perline,
+		original.format()
+	).scaled(
+		_minithumbSize,
+		_minithumbSize,
+		Qt::IgnoreAspectRatio,
+		Qt::SmoothTransformation);
+
+	const auto row = _minithumbsCount / kMinithumbsInRow;
+	const auto column = _minithumbsCount % kMinithumbsInRow;
+	const auto fromPerLine = cropped.bytesPerLine();
+	auto from = cropped.constBits();
+	const auto toPerLine = _minithumbs.bytesPerLine();
+	const auto toPerPixel = _minithumbs.depth() / 8;
+	auto to = _minithumbs.bits()
+		+ (row * _minithumbSize * toPerLine)
+		+ (column * _minithumbSize * toPerPixel);
+
+	Assert(toPerPixel == perpixel);
+	for (auto y = 0; y != _minithumbSize; ++y) {
+		Assert(to + toPerLine - _minithumbs.constBits()
+			<= _minithumbs.bytesPerLine() * _minithumbs.height());
+		memcpy(to, from, _minithumbSize * toPerPixel);
+		from += fromPerLine;
+		to += toPerLine;
+	}
+	++_minithumbsCount;
+}
+
 void RoundVideoRecorder::Private::initCircleMask() {
 	const auto width = kSide;
 	const auto height = kSide;
@@ -747,6 +822,16 @@ void RoundVideoRecorder::Private::initCircleMask() {
 	}
 }
 
+void RoundVideoRecorder::Private::initMinithumbsCanvas() {
+	const auto width = kMinithumbsInRow * _minithumbSize;
+	const auto seconds = (kMaxDuration + 999) / 1000;
+	const auto persecond = kMinithumbsPerSecond;
+	const auto frames = (seconds + persecond - 1) * persecond;
+	const auto rows = (frames + kMinithumbsInRow - 1) / kMinithumbsInRow;
+	const auto height = rows * _minithumbSize;
+	_minithumbs = QImage(width, height, QImage::Format_ARGB32_Premultiplied);
+}
+
 void RoundVideoRecorder::Private::cutCircleFromYUV420P(
 		not_null<AVFrame*> frame) {
 	const auto width = frame->width;
@@ -888,9 +973,9 @@ bool RoundVideoRecorder::Private::writeFrame(
 	while (true) {
 		error = AvErrorWrap(avcodec_receive_packet(codec.get(), pkt));
 		if (error.code() == AVERROR(EAGAIN)) {
-			return true;  // Need more input
+			return true; // Need more input
 		} else if (error.code() == AVERROR_EOF) {
-			return true;  // Encoding finished
+			return true; // Encoding finished
 		} else if (error) {
 			LogError("avcodec_receive_packet", error);
 			fail(Error::Encoding);
@@ -945,7 +1030,7 @@ RoundVideoRecorder::RoundVideoRecorder(
 	RoundVideoRecorderDescriptor &&descriptor)
 : _descriptor(std::move(descriptor))
 , _preview(std::make_unique<RpWidget>(_descriptor.container))
-, _private() {
+, _private(MinithumbSize()) {
 	setup();
 }
 

Telegram/SourceFiles/ui/controls/round_video_recorder.h

@@ -40,8 +40,11 @@ struct RoundVideoRecorderDescriptor {
 
 struct RoundVideoResult {
 	QByteArray content;
-	QByteArray waveform;
+	QVector<signed char> waveform;
 	crl::time duration = 0;
+	QImage minithumbs;
+	int minithumbsCount = 0;
+	int minithumbSize = 0;
 };
 
 struct RoundVideoPartial {