Parser::parse_meta( int $num_remaining_bytes ): Avifinfo\Status

673  private function parse_meta( $num_remaining_bytes ) {674    do {675      $box    = new Box();676      $status = $box->parse( $this->handle, $this->num_parsed_boxes, $num_remaining_bytes );677      if ( $status != FOUND ) {678        return $status;679      }680 681      if ( $box->type == 'pitm' ) {682        // See ISO/IEC 14496-12:2015(E) 8.11.4.2683        $num_bytes_per_id = ( $box->version == 0 ) ? 2 : 4;684        if ( $num_bytes_per_id > $num_remaining_bytes ) {685          return INVALID;686        }687        if ( !( $data = read( $this->handle, $num_bytes_per_id ) ) ) {688          return TRUNCATED;689        }690        $primary_item_id = read_big_endian( $data, $num_bytes_per_id );691        if ( $primary_item_id > MAX_VALUE ) {692          return ABORTED;693        }694        $this->features->has_primary_item = true;695        $this->features->primary_item_id  = $primary_item_id;696        if ( !skip( $this->handle, $box->content_size - $num_bytes_per_id ) ) {697          return TRUNCATED;698        }699      } else if ( $box->type == 'iprp' ) {700        $status = $this->parse_iprp( $box->content_size );701        if ( $status != NOT_FOUND ) {702          return $status;703        }704      } else if ( $box->type == 'iref' ) {705        $status = $this->parse_iref( $box->content_size );706        if ( $status != NOT_FOUND ) {707          return $status;708        }709      } else {710        if ( !skip( $this->handle, $box->content_size ) ) {711          return TRUNCATED;712        }713      }714      $num_remaining_bytes -= $box->size;715    } while ( $num_remaining_bytes != 0 );716    // According to ISO/IEC 14496-12:2012(E) 8.11.1.1 there is at most one "meta".717    return INVALID;718  }