indeo5.h

/* 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/>.
 *
 */

/* Intel Indeo 4 decompressor, derived from ffmpeg.
 *
 * Original copyright note:
 * Intel Indeo 4 (IV31, IV32, etc.) video decoder for ffmpeg
 * written, produced, and directed by Alan Smithee
 */

#ifndef IMAGE_CODECS_INDEO5_H
#define IMAGE_CODECS_INDEO5_H

#include "image/codecs/indeo/get_bits.h"
#include "image/codecs/indeo/indeo.h"

namespace Image {

using namespace Indeo;

class Indeo5Decoder : public IndeoDecoderBase {
    struct Transform {
        InvTransformPtr *inv_trans;
        DCTransformPtr  *dc_trans;
        int             is_2d_trans;
    };
public:
    Indeo5Decoder(uint16 width, uint16 height, uint bitsPerPixel = 16);
    ~Indeo5Decoder() override {}

    const Graphics::Surface *decodeFrame(Common::SeekableReadStream &stream) override;

    static bool isIndeo5(Common::SeekableReadStream &stream);
protected:
    int decodePictureHeader() override;

    void switchBuffers() override;

    bool isNonNullFrame() const override;

    int decodeBandHeader(IVIBandDesc *band) override;

    int decodeMbInfo(IVIBandDesc *band, IVITile *tile) override;
private:
    int decode_gop_header();

    int skip_hdr_extension();

private:
    static const uint8 _commonPicSizes[30];

    static const uint16 _baseQuant8x8Inter[5][64];
    static const uint16 _baseQuant8x8Intra[5][64];

    static const uint16 _baseQuant4x4Inter[16];
    static const uint16 _baseQuant4x4Intra[16];

    static const uint8 _scaleQuant8x8Inter[5][24];
    static const uint8 _scaleQuant8x8Intra[5][24];

    static const uint8 _scaleQuant4x4Inter[24];
    static const uint8 _scaleQuant4x4Intra[24];
};

} // End of namespace Image

#endif