FFmpeg/libavcodec/dirac.h

/*
 * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
 * Copyright (C) 2009 David Conrad
 * Copyright (C) 2011 Jordi Ortiz
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVCODEC_DIRAC_H
#define AVCODEC_DIRAC_H

/**
 * @file
 * Interface to Dirac Decoder/Encoder
 * @author Marco Gerards <marco@gnu.org>
 * @author David Conrad
 * @author Jordi Ortiz
 */

#include "avcodec.h"
#include "get_bits.h"

/**
 * Parse code values:
 *
 * Dirac Specification ->
 * 9.6.1  Table 9.1
 *
 * VC-2 Specification  ->
 * 10.4.1 Table 10.1
 */

enum DiracParseCodes {
    DIRAC_PCODE_SEQ_HEADER      = 0x00,
    DIRAC_PCODE_END_SEQ         = 0x10,
    DIRAC_PCODE_AUX             = 0x20,
    DIRAC_PCODE_PAD             = 0x30,
    DIRAC_PCODE_PICTURE_CODED   = 0x08,
    DIRAC_PCODE_PICTURE_RAW     = 0x48,
    DIRAC_PCODE_PICTURE_LOW_DEL = 0xC8,
    DIRAC_PCODE_PICTURE_HQ      = 0xE8,
    DIRAC_PCODE_MAGIC           = 0x42424344,
};

typedef struct DiracVersionInfo {
    int major;
    int minor;
} DiracVersionInfo;

typedef struct dirac_source_params {
    unsigned width;
    unsigned height;
    uint8_t chroma_format;          ///< 0: 444  1: 422  2: 420

    uint8_t interlaced;
    uint8_t top_field_first;

    uint8_t frame_rate_index;       ///< index into dirac_frame_rate[]
    uint8_t aspect_ratio_index;     ///< index into dirac_aspect_ratio[]

    uint16_t clean_width;
    uint16_t clean_height;
    uint16_t clean_left_offset;
    uint16_t clean_right_offset;

    uint8_t pixel_range_index;      ///< index into dirac_pixel_range_presets[]
    uint8_t color_spec_index;       ///< index into dirac_color_spec_presets[]
} dirac_source_params;

int avpriv_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
                                       dirac_source_params *source,
                                       DiracVersionInfo *version,
                                       int *bit_depth);

#endif /* AVCODEC_DIRAC_H */