Function avifWriteAltrGroup

src/write.c:2334–2353

}

static avifResult avifWriteAltrGroup(avifRWStream * s, uint32_t groupID, const avifEncoderItemIdArray * itemIDs)
{
    avifBoxMarker grpl;
    AVIF_CHECKRES(avifRWStreamWriteBox(s, "grpl", AVIF_BOX_SIZE_TBD, &grpl));

    avifBoxMarker altr;
    AVIF_CHECKRES(avifRWStreamWriteFullBox(s, "altr", AVIF_BOX_SIZE_TBD, 0, 0, &altr));

    AVIF_CHECKRES(avifRWStreamWriteU32(s, groupID));                  // unsigned int(32) group_id;
    AVIF_CHECKRES(avifRWStreamWriteU32(s, (uint32_t)itemIDs->count)); // unsigned int(32) num_entities_in_group;
    for (uint32_t i = 0; i < itemIDs->count; ++i) {
        AVIF_CHECKRES(avifRWStreamWriteU32(s, (uint32_t)itemIDs->itemID[i])); // unsigned int(32) entity_id;
    }

    AVIF_CHECKRES(avifRWStreamFinishBox(s, altr));

    AVIF_CHECKRES(avifRWStreamFinishBox(s, grpl));

    return AVIF_RESULT_OK;
}

#if defined(AVIF_ENABLE_EXPERIMENTAL_MINI)
// Returns true if the image can be encoded with a MinimizedImageBox instead of a full regular MetaBox.