/* -----------------------------------------------------------------------------

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the Software are granted under this license.

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Copyright (c) 2018-2026, Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. & The VVdeC Authors.

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------------------------------------------------------------------------------------------- */

#include "SEI_internal.h"

#include "vvdec/sei.h"

#include <stdlib.h>

#include "CommonDef.h"

namespace vvdec

{

const char *SEI_internal::getSEIMessageString( vvdecSEIPayloadType payloadType)

{

  switch (payloadType)

  {

    case VVDEC_BUFFERING_PERIOD:                     return "Buffering period";

    case VVDEC_PICTURE_TIMING:                       return "Picture timing";

    case VVDEC_FILLER_PAYLOAD:                       return "Filler payload";                       // not currently decoded

    case VVDEC_USER_DATA_REGISTERED_ITU_T_T35:       return "User data registered";                 // not currently decoded

    case VVDEC_USER_DATA_UNREGISTERED:               return "User data unregistered";

    case VVDEC_FILM_GRAIN_CHARACTERISTICS:           return "Film grain characteristics";           // not currently decoded

    case VVDEC_FRAME_PACKING:                        return "Frame packing arrangement";

    case VVDEC_PARAMETER_SETS_INCLUSION_INDICATION:  return "Parameter sets inclusion indication";

    case VVDEC_DECODING_UNIT_INFO:                   return "Decoding unit information";

    case VVDEC_SCALABLE_NESTING:                     return "Scalable nesting";

    case VVDEC_DECODED_PICTURE_HASH:                 return "Decoded picture hash";

    case VVDEC_DEPENDENT_RAP_INDICATION:             return "Dependent RAP indication";

    case VVDEC_MASTERING_DISPLAY_COLOUR_VOLUME:      return "Mastering display colour volume";

    case VVDEC_ALTERNATIVE_TRANSFER_CHARACTERISTICS: return "Alternative transfer characteristics";

    case VVDEC_CONTENT_LIGHT_LEVEL_INFO:             return "Content light level information";

    case VVDEC_AMBIENT_VIEWING_ENVIRONMENT:          return "Ambient viewing environment";

    case VVDEC_CONTENT_COLOUR_VOLUME:                return "Content colour volume";

    case VVDEC_EQUIRECTANGULAR_PROJECTION:           return "Equirectangular projection";

    case VVDEC_SPHERE_ROTATION:                      return "Sphere rotation";

    case VVDEC_REGION_WISE_PACKING:                  return "Region wise packing information";

    case VVDEC_OMNI_VIEWPORT:                        return "Omni viewport";

    case VVDEC_GENERALIZED_CUBEMAP_PROJECTION:       return "Generalized cubemap projection";

    case VVDEC_FRAME_FIELD_INFO:                     return "Frame field info";

    case VVDEC_SAMPLE_ASPECT_RATIO_INFO:             return "Sample aspect ratio information";

    case VVDEC_SUBPICTURE_LEVEL_INFO:                return "Subpicture level information";

    default:                                        return "Unknown";

  }

}

seiMessages SEI_internal::getSeisByType(const seiMessages &seiList, vvdecSEIPayloadType seiType)

{

  seiMessages result;

  for( auto& s : seiList )

  {

    if ( s->payloadType == seiType)

    {

      result.push_back(s);

    }

  }

  return result;

}

seiMessages SEI_internal::extractSeisByType(seiMessages &seiList, vvdecSEIPayloadType seiType)

{

  seiMessages result;

  seiMessages::iterator it=seiList.begin();

  while ( it!=seiList.end() )

  {

    if ((*it)->payloadType == seiType)

    {

      result.push_back(*it);

      it = seiList.erase(it);

    }

    else

    {

      it++;

    }

  }

  return result;

}

void SEI_internal::deleteSEI( vvdecSEI* sei )

{

  if( !sei )

  {

    return;

  }

  if( sei->payloadType == VVDEC_SCALABLE_NESTING && sei->payload )

  {

    const vvdecSEIScalableNesting* nestingSei = ( vvdecSEIScalableNesting* ) sei->payload;

    for( int i = 0; i < nestingSei->snNumSEIs; ++i )

    {

      // nested SEIs may be unset, if parsing of the nesting SEI was aborted

      deleteSEI( nestingSei->nestedSEIs[i] );

    }

  }

  if( sei->payload )

    free( sei->payload );

  delete sei;

}

void SEI_internal::deleteSEIs ( seiMessages &seiList)

{

  for( auto &sei : seiList )

  {

    deleteSEI( sei );

  }

  seiList.clear();

}

vvdecSEI* SEI_internal::allocSEI( vvdecSEIPayloadType payloadType )

{

  vvdecSEI* sei = new vvdecSEI;

  if( sei )

  {

    sei->payload     = NULL;

    sei->payloadType = (vvdecSEIPayloadType)payloadType;

    sei->size        = 0;

  }

  else

  {

    CHECK_FATAL( !sei, "sei memory allocation error" );

    return nullptr;

  }

  if( 0 != allocSEIPayload( sei ))

  {

    CHECK_FATAL( !sei, "sei payload allocation error" );

    delete sei ;

    return nullptr;

  }

  return sei;

}

int SEI_internal::allocSEIPayload( vvdecSEI* sei, int userDefSize )

{

  if( NULL == sei ){ return -1; }

  int size = userDefSize>0 ? userDefSize : getPayloadSize( sei->payloadType );

  if( size <= 0 ){ return -1;}

  sei->payload = malloc( size );

  if( sei->payload )

  {

    sei->size = size;

    memset(  sei->payload, 0, size );

  }

  return 0;

}

int SEI_internal::getPayloadSize(vvdecSEIPayloadType payloadType)

{

  switch (payloadType)

  {

    case VVDEC_BUFFERING_PERIOD:                     return sizeof( vvdecSEIBufferingPeriod );

    case VVDEC_PICTURE_TIMING:                       return sizeof( vvdecSEIPictureTiming );

    case VVDEC_FILLER_PAYLOAD:                       return 0;

    case VVDEC_USER_DATA_REGISTERED_ITU_T_T35:       return sizeof( vvdecSEIUserDataRegistered );                 // not currently decoded

    case VVDEC_USER_DATA_UNREGISTERED:               return sizeof( vvdecSEIUserDataUnregistered );

    case VVDEC_FILM_GRAIN_CHARACTERISTICS:           return sizeof( vvdecSEIFilmGrainCharacteristics );

    case VVDEC_FRAME_PACKING:                        return sizeof( vvdecSEIFramePacking );

    case VVDEC_PARAMETER_SETS_INCLUSION_INDICATION:  return sizeof( vvdecSEIParameterSetsInclusionIndication );

    case VVDEC_DECODING_UNIT_INFO:                   return sizeof( vvdecSEIDecodingUnitInfo );

    case VVDEC_SCALABLE_NESTING:                     return sizeof( vvdecSEIScalableNesting );

    case VVDEC_DECODED_PICTURE_HASH:                 return sizeof( vvdecSEIDecodedPictureHash );

    case VVDEC_DEPENDENT_RAP_INDICATION:             return sizeof( vvdecSEIDependentRapIndication );

    case VVDEC_MASTERING_DISPLAY_COLOUR_VOLUME:      return sizeof( vvdecSEIMasteringDisplayColourVolume );

    case VVDEC_ALTERNATIVE_TRANSFER_CHARACTERISTICS: return sizeof( vvdecSEIAlternativeTransferCharacteristics );

    case VVDEC_CONTENT_LIGHT_LEVEL_INFO:             return sizeof( vvdecSEIContentLightLevelInfo );

    case VVDEC_AMBIENT_VIEWING_ENVIRONMENT:          return sizeof( vvdecSEIAmbientViewingEnvironment );

    case VVDEC_CONTENT_COLOUR_VOLUME:                return sizeof( vvdecSEIContentColourVolume );

    case VVDEC_EQUIRECTANGULAR_PROJECTION:           return sizeof( vvdecSEIEquirectangularProjection );

    case VVDEC_SPHERE_ROTATION:                      return sizeof( vvdecSEISphereRotation );

    case VVDEC_REGION_WISE_PACKING:                  return sizeof( vvdecSEIRegionWisePacking );

    case VVDEC_OMNI_VIEWPORT:                        return sizeof( vvdecSEIOmniViewport );

    case VVDEC_GENERALIZED_CUBEMAP_PROJECTION:       return sizeof( vvdecSEIGeneralizedCubemapProjection );

    case VVDEC_FRAME_FIELD_INFO:                     return sizeof( vvdecSEIFrameFieldInfo );

    case VVDEC_SAMPLE_ASPECT_RATIO_INFO:             return sizeof( vvdecSEISampleAspectRatioInfo );

    case VVDEC_SUBPICTURE_LEVEL_INFO:                return sizeof( vvdecSEISubpictureLevelInfo );

    default:                                         return -1;

  }

  return -1;

}

}