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image/codecs/indeo3.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "common/scummsys.h"
+
+/* Intel Indeo 3 decompressor, derived from ffmpeg.
+ *
+ * Original copyright note:
+ * Intel Indeo 3 (IV31, IV32, etc.) video decoder for ffmpeg
+ * written, produced, and directed by Alan Smithee
+ */
+
+#ifndef IMAGE_CODECS_INDEO3_H
+#define IMAGE_CODECS_INDEO3_H
+
+#include "image/codecs/codec.h"
+
+namespace Image {
+
+/**
+ * Intel Indeo 3 decoder.
+ *
+ * Used by BMP/AVI.
+ *
+ * Used in video:
+ *  - VMDDecoder
+ */
+class Indeo3Decoder : public Codec {
+public:
+	Indeo3Decoder(uint16 width, uint16 height, uint bitsPerPixel = 24);
+	~Indeo3Decoder() override;
+
+	const Graphics::Surface *decodeFrame(Common::SeekableReadStream &stream) override;
+	Graphics::PixelFormat getPixelFormat() const override;
+	bool setOutputPixelFormat(const Graphics::PixelFormat &format) override {
+		if (format.bytesPerPixel != 2 && format.bytesPerPixel != 4)
+			return false;
+		_pixelFormat = format;
+		return true;
+	}
+
+	static bool isIndeo3(Common::SeekableReadStream &stream);
+
+private:
+	Graphics::Surface *_surface;
+
+	uint16 _width;
+	uint16 _height;
+	Graphics::PixelFormat _pixelFormat;
+
+	static const byte _corrector_type_0[24];
+	static const byte _corrector_type_2[8];
+	static const uint32 correction[];
+	static const uint32 correctionloworder[];
+	static const uint32 correctionhighorder[];
+
+	struct YUVBufs {
+		byte *Ybuf;
+		byte *Ubuf;
+		byte *Vbuf;
+		byte *the_buf;
+		uint32 the_buf_size;
+		uint16 y_w, y_h;
+		uint16 uv_w, uv_h;
+	};
+
+	YUVBufs _iv_frame[2];
+	YUVBufs *_cur_frame;
+	YUVBufs *_ref_frame;
+
+	byte *_ModPred;
+	byte *_corrector_type;
+
+	void buildModPred();
+	void allocFrames();
+
+	void decodeChunk(byte *cur, byte *ref, int width, int height,
+			const byte *buf1, uint32 fflags2, const byte *hdr,
+			const byte *buf2, int min_width_160);
+};
+
+} // End of namespace Image
+
+#endif