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image/codecs/mpeg.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/>.
+ *
+ */
+
+#ifndef IMAGE_CODECS_MPEG_H
+#define IMAGE_CODECS_MPEG_H
+
+#include "image/codecs/codec.h"
+#include "graphics/pixelformat.h"
+
+typedef struct mpeg2dec_s mpeg2dec_t;
+typedef struct mpeg2_info_s mpeg2_info_t;
+
+namespace Common {
+class SeekableReadStream;
+}
+
+namespace Graphics {
+struct Surface;
+}
+
+namespace Image {
+
+/**
+ * MPEG 1/2 video decoder.
+ *
+ * Used by BMP/AVI.
+ */
+class MPEGDecoder : public Codec {
+public:
+	MPEGDecoder();
+	~MPEGDecoder() override;
+
+	// Codec interface
+	const Graphics::Surface *decodeFrame(Common::SeekableReadStream &stream) override;
+	Graphics::PixelFormat getPixelFormat() const override { return _pixelFormat; }
+	bool setOutputPixelFormat(const Graphics::PixelFormat &format) override {
+		if (format.bytesPerPixel != 2 && format.bytesPerPixel != 4)
+			return false;
+		_pixelFormat = format;
+		return true;
+	}
+
+	// MPEGPSDecoder call
+	bool decodePacket(Common::SeekableReadStream &packet, uint32 &framePeriod, Graphics::Surface *dst = 0);
+
+private:
+	Graphics::PixelFormat _pixelFormat;
+	Graphics::Surface *_surface;
+
+	enum {
+		BUFFER_SIZE = 4096
+	};
+
+	byte _buffer[BUFFER_SIZE];
+	mpeg2dec_t *_mpegDecoder;
+	const mpeg2_info_t *_mpegInfo;
+};
+
+} // End of namespace Image
+
+#endif // IMAGE_CODECS_MPEG_H