/*
   mkvmerge -- utility for splicing together matroska files
   from component media subtypes

   Distributed under the GPL v2
   see the file COPYING for details
   or visit http://www.gnu.org/copyleft/gpl.html

   Ogg Theora helper functions

   Written by Moritz Bunkus <moritz@bunkus.org>.
*/

#pragma once

#include "common/common_pch.h"

#include "common/error.h"

#define THEORA_HEADERTYPE_IDENTIFICATION 0x80
#define THEORA_HEADERTYPE_COMMENT        0x81
#define THEORA_HEADERTYPE_SETUP          0x82

namespace mtx {
  namespace theora {
    class header_parsing_x: public mtx::exception {
    protected:
      std::string m_message;
    public:
      header_parsing_x(const std::string &message) : m_message{message} { }
      virtual ~header_parsing_x() throw() { }

      virtual const char *what() const throw() {
        return m_message.c_str();
      }
    };
  }
}

struct theora_identification_header_t {
  uint8_t headertype{};
  char theora_string[6]{};

  uint8_t vmaj{};
  uint8_t vmin{};
  uint8_t vrev{};

  uint16_t fmbw{};
  uint16_t fmbh{};

  uint32_t picw{};
  uint32_t pich{};
  uint8_t picx{};
  uint8_t picy{};

  uint32_t frn{};
  uint32_t frd{};

  uint32_t parn{};
  uint32_t pard{};

  uint8_t cs{};
  uint8_t pf{};

  uint32_t nombr{};
  uint8_t qual{};

  uint8_t kfgshift{};

  int display_width{}, display_height{};
};

void theora_parse_identification_header(unsigned char *buffer, int size, theora_identification_header_t &header);
