Codec Kit: Initial BMetaData implementation

2018-11-18 16:57:12 +01:00
parent b4d8bbd540
commit 1f2ddf2fd0
3 changed files with 193 additions and 0 deletions
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2018, Dario Casalinuovo. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+#ifndef _META_DATA_H
+#define _META_DATA_H
+
+#include <Message.h>
+
+
+namespace BPrivate {
+namespace media {
+
+
+enum MetaDataKeys {
+	// Playback capabilities
+	CanPause = 0x1000,	// bool
+	CanSeekBackward,	// bool
+	CanSeekForward,		// bool
+	CanSeek,			// bool
+
+	// Bitrates
+	AudioBitRate,		// uint32 (bps)
+	VideoBitRate,		// uint32 (bps)
+	AudioSampleRate,	// uint32 (hz)
+	VideoFrameRate,		// uint32 (hz)
+
+	// RFC2046 and RFC4281
+	MimeType,			// BString
+	AudioCodec,			// BString
+	VideoCodec,			// BString
+	VideoHeight,		// uint32
+	VideoWidth,			// uint32
+	NumTracks,			// uint32
+	DrmCrippled,		// bool
+
+	// General use attributes
+	Title,				// BString
+	Comment,			// BString
+	Copyright,			// BString
+	Album,				// BString
+	Artist,				// BString
+	Author,				// BString
+	Composer,			// BString
+	Genre,				// BString
+	// TODO: what we would use for encoded dates?
+	// Date,			// date
+	Duration,			// uint32 (ms)
+	Rating,				// BString
+	// TODO: BBitmap? uint8 array?
+	//AlbumArt,			// 
+	CDTrackNum,			// uint32
+	CDTrackMax			// uint32
+};
+
+
+class BMetaData {
+public:
+						BMetaData();
+						~BMetaData();
+
+	// Woah. It seems we need BValue there.
+	status_t			SetString(uint32 key, const BString& value);
+	status_t			SetBool(uint32 key, bool value);
+	status_t			SetUInt32(uint32 key, uint32 value);
+
+	status_t			FindString(uint32 key, BString* value) const;
+	status_t			FindBool(uint32 key, bool* value) const;
+    status_t			FindUInt32(uint32 key, uint32* value) const;
+
+	status_t			RemoveValue(uint32 key);
+
+	// Clean up all keys
+	void 				Reset();
+
+	status_t			FromMessage(const BMessage& msg);
+	const BMessage&		ToMessage();
+
+private:
+	// TODO: padding
+	BMessage*			fMessage;
+
+						BMetaData(const BMetaData&);
+						BMetaData& operator=(const BMetaData&);
+};
+
+} // namespace media
+} // namespace BPrivate
+
+using namespace BPrivate::media;
+
+#endif	// _META_DATA_H