feat: add wallpaper transitions, store crop in database per-wallpaper, move CUDA context creation to async thread

2026-10-26 14:47:47 +01:00
parent dc0f222ace
commit e655ec5bc7
26 changed files with 2338 additions and 210 deletions
@@ -285,6 +285,91 @@ inline QByteArray videoCacheBytes(const QString& src, const QSize& fit) {
 	return frame.readAll();
 }

+inline QByteArray videoPosterBytes(const QString& src, const QSize& fit) {
+	auto runProcess = [](const QString& program, const QStringList& args) {
+		QProcess process;
+		process.start(program, args);
+		if (!process.waitForFinished(15000)) {
+			process.kill();
+			process.waitForFinished(1000);
+		}
+		return qMakePair(process.exitCode(), process.readAllStandardOutput());
+	};
+
+	QSize source;
+	const auto resProbe = runProcess(
+		"ffprobe",
+		{
+			"-v",
+			"error",
+			"-select_streams",
+			"v:0",
+			"-show_entries",
+			"stream=width,height",
+			"-of",
+			"csv=s=x:p=0",
+			src,
+		});
+	if (resProbe.first == 0) {
+		const auto parts =
+			QString::fromUtf8(resProbe.second).trimmed().split('x');
+		if (parts.size() == 2) {
+			source = QSize(parts[0].toInt(), parts[1].toInt());
+		}
+	}
+
+	QSize target = coverSizeNoUpscale(source, fit);
+	if (target.isEmpty()) {
+		target = fit;
+	}
+
+	target.setWidth(target.width() & ~1);
+	target.setHeight(target.height() & ~1);
+
+	const QString scale =
+		QStringLiteral(
+			"scale=%1:%2:force_original_aspect_ratio=decrease,"
+			"scale=trunc(iw/2)*2:trunc(ih/2)*2")
+			.arg(target.width())
+			.arg(target.height());
+
+	QTemporaryDir tmpDir;
+	if (!tmpDir.isValid()) {
+		return {};
+	}
+
+	const QString framePath = tmpDir.filePath(QStringLiteral("poster.jpg"));
+
+	runProcess(
+		"ffmpeg",
+		{
+			"-hide_banner",
+			"-loglevel",
+			"error",
+			"-ss",
+			"0",
+			"-i",
+			src,
+			"-frames:v",
+			"1",
+			"-vf",
+			scale,
+			"-pix_fmt",
+			"yuvj420p",
+			"-q:v",
+			"2",
+			"-y",
+			framePath,
+		});
+
+	QFile frame(framePath);
+	if (!frame.open(QIODevice::ReadOnly)) {
+		return {};
+	}
+
+	return frame.readAll();
+}
+
 inline QByteArray schemeThumbBytes(const QByteArray& source, int maxSide) {
 	QImage image = QImage::fromData(source, "JPEG");
 	if (image.isNull()) {