FFmpeg/libavcodec/dirac.h

/*
 * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
 * Copyright (C) 2009 David Conrad
 *
 * This file is part of Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; 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>
 */

#include "avcodec.h"

typedef struct AVDiracSeqHeader {
    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[]

    int profile;
    int level;

    AVRational framerate;
    AVRational sample_aspect_ratio;

    enum AVPixelFormat pix_fmt;
    enum AVColorRange color_range;
    enum AVColorPrimaries color_primaries;
    enum AVColorTransferCharacteristic color_trc;
    enum AVColorSpace colorspace;
} AVDiracSeqHeader;

/**
 * Parse a Dirac sequence header.
 *
 * @param dsh this function will allocate and fill an AVDiracSeqHeader struct
 *            and write it into this pointer. The caller must free it with
 *            av_free().
 * @param buf the data buffer
 * @param buf_size the size of the data buffer in bytes
 * @param log_ctx if non-NULL, this function will log errors here
 * @return 0 on success, a negative AVERROR code on failure
 */
int av_dirac_parse_sequence_header(AVDiracSeqHeader **dsh,
                                   const uint8_t *buf, size_t buf_size,
                                   void *log_ctx);

#endif /* AVCODEC_DIRAC_H */