text: /*
   * TIFF image encoder
   * Copyright (c) 2007 Bartlomiej Wolowiec
   *
   * This file is part of FFmpeg.
   *
   * FFmpeg 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.
   *
   * FFmpeg 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 FFmpeg; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   */
  
  /**
   * @file
   * TIFF image encoder
   * @author Bartlomiej Wolowiec
   */
  
  #include "config.h"
  #if CONFIG_ZLIB
  #include <zlib.h>
  #endif
  
  #include "libavutil/imgutils.h"
  #include "libavutil/log.h"
  #include "libavutil/opt.h"
  #include "libavutil/pixdesc.h"
  #include "avcodec.h"
  #include "bytestream.h"
  #include "internal.h"
  #include "lzw.h"
  #include "put_bits.h"
  #include "rle.h"
  #include "tiff.h"
  
  #define TIFF_MAX_ENTRY 32
  
  /** sizes of various TIFF field types (string size = 1)*/
  static const uint8_t type_sizes2[14] = {
      0, 1, 1, 2, 4, 8, 1, 1, 2, 4, 8, 4, 8, 4
  };
  
  typedef struct TiffEncoderContext {
      AVClass *class;                         ///< for private options
      AVCodecContext *avctx;
  
      int width;                              ///< picture width
      int height;                             ///< picture height
      unsigned int bpp;                       ///< bits per pixel
      int compr;                              ///< compression level
      int bpp_tab_size;                       ///< bpp_tab size
      enum TiffPhotometric photometric_interpretation;  ///< photometric interpretation
      int strips;                             ///< number of strips
      uint32_t *strip_sizes;
      unsigned int strip_sizes_size;
      uint32_t *strip_offsets;
      unsigned int strip_offsets_size;
      uint8_t *yuv_line;
      unsigned int yuv_line_size;
      int rps;                                ///< row per strip
      uint8_t entries[TIFF_MAX_ENTRY * 12];   ///< entries in header
      int num_entries;                        ///< number of entries
      uint8_t **buf;                          ///< actual position in buffer
      uint8_t *buf_start;                     ///< pointer to first byte in buffer
      int buf_size;                           ///< buffer size
      uint16_t subsampling[2];                ///< YUV subsampling factors
      struct LZWEncodeState *lzws;            ///< LZW encode state
      uint32_t dpi;                           ///< image resolution in DPI
  } TiffEncoderContext;
  
  /**
   * Check free space in buffer.
   *
   * @param s Tiff context
   * @param need Needed bytes
   * @return 0 - ok, 1 - no free space
   */
  static inline int check_size(TiffEncoderContext *s, uint64_t need)
  {
      if (s->buf_size < *s->buf - s->buf_start + need) {
          *s->buf = s->buf_start + s->buf_size + 1;
          av_log(s->avctx, AV_LOG_ERROR, "Buffer is too small\n");
          return 1;
      }
      return 0;
  }
  
  /**
   * Put n values to buffer.
   *
   * @param p pointer to pointer to output buffer
   * @param n number of values
   * @param val pointer to values
   * @param type type of values
   * @param flip = 0 - normal copy, >0 - flip
   */
  static void tnput(uint8_t **p, int n, const uint8_t *val, enum TiffTypes type,
                    int flip)
  {
      int i;
  #if HAVE_BIGENDIAN
      flip ^= ((int[]) { 0, 0, 0, 1, 3, 3 })[type];
  #endif
      for (i = 0; i < n * type_sizes2[type]; i++)
          *(*p)++ = val[i ^ flip];
  }
  
  /**
   * Add entry to directory in tiff header.
   *
   * @param s Tiff context
   * @param tag tag that identifies the entry
   * @param type entry type
   * @param count the number of values
   * @param ptr_val pointer to values
   */
  static int add_entry(TiffEncoderContext *s, enum TiffTags tag,
                       enum TiffTypes type, int count, const void *ptr_val)
  {
      uint8_t *entries_ptr = s->entries + 12 * s->num_entries;
  
      av_assert0(s->num_entries < TIFF_MAX_ENTRY);
  
      bytestream_put_le16(&entries_ptr, tag);
      bytestream_put_le16(&entries_ptr, type);
      bytestream_put_le32(&entries_ptr, count);
  
      if (type_sizes[type] * (int64_t)count <= 4) {
          tnput(&entries_ptr, count, ptr_val, type, 0);
      } else {
          bytestream_put_le32(&entries_ptr, *s->buf - s->buf_start);
          if (check_size(s, count * (int64_t)type_sizes2[type]))
              return AVERROR_INVALIDDATA;
          tnput(s->buf, count, ptr_val, type, 0);
      }
  
      s->num_entries++;
      return 0;
  }
  
  static int add_entry1(TiffEncoderContext *s,
                        enum TiffTags tag, enum TiffTypes type, int val)
  {
      uint16_t w  = val;
      uint32_t dw = val;
      return add_entry(s, tag, type, 1,
                       type == TIFF_SHORT ? (void *)&w : (void *)&dw);
  }
  
  /**
   * Encode one strip in tiff file.
   *
   * @param s Tiff context
   * @param src input buffer
   * @param dst output buffer
   * @param n size of input buffer
   * @param compr compression method
   * @return number of output bytes. If an output error is encountered, -1 is returned
   */
  static int encode_strip(TiffEncoderContext *s, const int8_t *src,
                          uint8_t *dst, int n, int compr)
  {
      switch (compr) {
  #if CONFIG_ZLIB
      case TIFF_DEFLATE:
      case TIFF_ADOBE_DEFLATE:
      {
          unsigned long zlen = s->buf_size - (*s->buf - s->buf_start);
          if (compress(dst, &zlen, src, n) != Z_OK) {
              av_log(s->avctx, AV_LOG_ERROR, "Compressing failed\n");
              return -1;
          }
          return zlen;
      }
  #endif
      case TIFF_RAW:
          if (check_size(s, n))
              return -1;
          memcpy(dst, src, n);
          return n;
      case TIFF_PACKBITS:
          return ff_rle_encode(dst, s->buf_size - (*s->buf - s->buf_start),
                               src, 1, n, 2, 0xff, -1, 0);
      case TIFF_LZW:
          return ff_lzw_encode(s->lzws, src, n);
      default:
          return -1;
      }
  }
  
  static void pack_yuv(TiffEncoderContext *s, const AVFrame *p,
                       uint8_t *dst, int lnum)
  {
      int i, j, k;
      int w       = (s->width - 1) / s->subsampling[0] + 1;
      uint8_t *pu = &p->data[1][lnum / s->subsampling[1] * p->linesize[1]];
      uint8_t *pv = &p->data[2][lnum / s->subsampling[1] * p->linesize[2]];
      if (s->width % s->subsampling[0] || s->height % s->subsampling[1]) {
          for (i = 0; i < w; i++) {
              for (j = 0; j < s->subsampling[1]; j++)
                  for (k = 0; k < s->subsampling[0]; k++)
                      *dst++ = p->data[0][FFMIN(lnum + j, s->height-1) * p->linesize[0] +
                                          FFMIN(i * s->subsampling[0] + k, s->width-1)];
              *dst++ = *pu++;
              *dst++ = *pv++;
          }
      }else{
          for (i = 0; i < w; i++) {
              for (j = 0; j < s->subsampling[1]; j++)
                  for (k = 0; k < s->subsampling[0]; k++)
                      *dst++ = p->data[0][(lnum + j) * p->linesize[0] +
                                          i * s->subsampling[0] + k];
              *dst++ = *pu++;
              *dst++ = *pv++;
          }
      }
  }
  
  #define ADD_ENTRY(s, tag, type, count, ptr_val)         \
      do {                                                \
          ret = add_entry(s, tag, type, count, ptr_val);  \
          if (ret < 0)                                    \
              goto fail;                                  \
      } while (0)
  
  #define ADD_ENTRY1(s, tag, type, val)           \
      do {                                        \
          ret = add_entry1(s, tag, type, val);    \
          if (ret < 0)                            \
              goto fail;                          \
      } while (0)
  
  static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                          const AVFrame *pict, int *got_packet)
  {
      const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
      TiffEncoderContext *s = avctx->priv_data;
      const AVFrame *const p = pict;
      int i;
      uint8_t *ptr;
      uint8_t *offset;
      uint32_t strips;
      int bytes_per_row;
      uint32_t res[2] = { s->dpi, 1 };    // image resolution (72/1)
      uint16_t bpp_tab[4];
      int ret = 0;
      int is_yuv = 0, alpha = 0;
      int shift_h, shift_v;
      int packet_size;
  
      s->width          = avctx->width;
      s->height         = avctx->height;
      s->subsampling[0] = 1;
      s->subsampling[1] = 1;
  
      avctx->bits_per_coded_sample =
      s->bpp          = av_get_bits_per_pixel(desc);
      s->bpp_tab_size = desc->nb_components;
  
      switch (avctx->pix_fmt) {
      case AV_PIX_FMT_RGBA64LE:
      case AV_PIX_FMT_RGBA:
          alpha = 1;
      case AV_PIX_FMT_RGB48LE:
      case AV_PIX_FMT_RGB24:
          s->photometric_interpretation = TIFF_PHOTOMETRIC_RGB;
          break;
      case AV_PIX_FMT_GRAY8:
          avctx->bits_per_coded_sample = 0x28;
      case AV_PIX_FMT_GRAY8A:
      case AV_PIX_FMT_YA16LE:
          alpha = avctx->pix_fmt == AV_PIX_FMT_GRAY8A || avctx->pix_fmt == AV_PIX_FMT_YA16LE;
      case AV_PIX_FMT_GRAY16LE:
      case AV_PIX_FMT_MONOBLACK:
          s->photometric_interpretation = TIFF_PHOTOMETRIC_BLACK_IS_ZERO;
          break;
      case AV_PIX_FMT_PAL8:
          s->photometric_interpretation = TIFF_PHOTOMETRIC_PALETTE;
          break;
      case AV_PIX_FMT_MONOWHITE:
          s->photometric_interpretation = TIFF_PHOTOMETRIC_WHITE_IS_ZERO;
          break;
      case AV_PIX_FMT_YUV420P:
      case AV_PIX_FMT_YUV422P:
      case AV_PIX_FMT_YUV440P:
      case AV_PIX_FMT_YUV444P:
      case AV_PIX_FMT_YUV410P:
      case AV_PIX_FMT_YUV411P:
          av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &shift_h, &shift_v);
          s->photometric_interpretation = TIFF_PHOTOMETRIC_YCBCR;
          s->subsampling[0]             = 1 << shift_h;
          s->subsampling[1]             = 1 << shift_v;
          is_yuv                        = 1;
          break;
      default:
          av_log(s->avctx, AV_LOG_ERROR,
                 "This colors format is not supported\n");
          return -1;
      }
  
      for (i = 0; i < s->bpp_tab_size; i++)
          bpp_tab[i] = desc->comp[i].depth_minus1 + 1;
  
      if (s->compr == TIFF_DEFLATE       ||
          s->compr == TIFF_ADOBE_DEFLATE ||
          s->compr == TIFF_LZW)
          // best choice for DEFLATE
          s->rps = s->height;
      else
          // suggest size of strip
          s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1);
      // round rps up
      s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1];
  
      strips = (s->height - 1) / s->rps + 1;
  
      bytes_per_row = (((s->width - 1) / s->subsampling[0] + 1) * s->bpp *
                       s->subsampling[0] * s->subsampling[1] + 7) >> 3;
      packet_size = avctx->height * bytes_per_row * 2 +
                    avctx->height * 4 + FF_MIN_BUFFER_SIZE;
  
      if ((ret = ff_alloc_packet2(avctx, pkt, packet_size)) < 0)
          return ret;
      ptr          = pkt->data;
      s->buf_start = pkt->data;
      s->buf       = &ptr;
      s->buf_size  = pkt->size;
  
      if (check_size(s, 8)) {
          ret = AVERROR(EINVAL);
          goto fail;
      }
  
      // write header
      bytestream_put_le16(&ptr, 0x4949);
      bytestream_put_le16(&ptr, 42);
  
      offset = ptr;
      bytestream_put_le32(&ptr, 0);
  
      if (strips > INT_MAX / FFMAX(sizeof(s->strip_sizes[0]), sizeof(s->strip_offsets[0]))) {
          ret = AVERROR(ENOMEM);
          goto fail;
      }
      av_fast_padded_mallocz(&s->strip_sizes  , &s->strip_sizes_size  , sizeof(s->strip_sizes  [0]) * strips);
      av_fast_padded_mallocz(&s->strip_offsets, &s->strip_offsets_size, sizeof(s->strip_offsets[0]) * strips);
  
      if (!s->strip_sizes || !s->strip_offsets) {
          ret = AVERROR(ENOMEM);
          goto fail;
      }
  
      if (is_yuv) {
          av_fast_padded_malloc(&s->yuv_line, &s->yuv_line_size, bytes_per_row);
          if (s->yuv_line == NULL) {
              av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");
              ret = AVERROR(ENOMEM);
              goto fail;
          }
      }
  
  #if CONFIG_ZLIB
      if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
          uint8_t *zbuf;
          int zlen, zn;
          int j;
  
          zlen = bytes_per_row * s->rps;
          zbuf = av_malloc(zlen);
          if (!zbuf) {
              ret = AVERROR(ENOMEM);
              goto fail;
          }
          s->strip_offsets[0] = ptr - pkt->data;
          zn               = 0;
          for (j = 0; j < s->rps; j++) {
              if (is_yuv) {
                  pack_yuv(s, p, s->yuv_line, j);
                  memcpy(zbuf + zn, s->yuv_line, bytes_per_row);
                  j += s->subsampling[1] - 1;
              } else
                  memcpy(zbuf + j * bytes_per_row,
                         p->data[0] + j * p->linesize[0], bytes_per_row);
              zn += bytes_per_row;
          }
          ret = encode_strip(s, zbuf, ptr, zn, s->compr);
          av_free(zbuf);
          if (ret < 0) {
              av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
              goto fail;
          }
          ptr           += ret;
          s->strip_sizes[0] = ptr - pkt->data - s->strip_offsets[0];
      } else
  #endif
      {
      if (s->compr == TIFF_LZW) {
          s->lzws = av_malloc(ff_lzw_encode_state_size);
          if (!s->lzws) {
              ret = AVERROR(ENOMEM);
              goto fail;
          }
      }
      for (i = 0; i < s->height; i++) {
          if (s->strip_sizes[i / s->rps] == 0) {
              if (s->compr == TIFF_LZW) {
                  ff_lzw_encode_init(s->lzws, ptr,
                                     s->buf_size - (*s->buf - s->buf_start),
                                     12, FF_LZW_TIFF, put_bits);
              }
              s->strip_offsets[i / s->rps] = ptr - pkt->data;
          }
          if (is_yuv) {
              pack_yuv(s, p, s->yuv_line, i);
              ret = encode_strip(s, s->yuv_line, ptr, bytes_per_row, s->compr);
              i  += s->subsampling[1] - 1;
          } else
              ret = encode_strip(s, p->data[0] + i * p->linesize[0],
                                 ptr, bytes_per_row, s->compr);
          if (ret < 0) {
              av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
              goto fail;
          }
          s->strip_sizes[i / s->rps] += ret;
          ptr                     += ret;
          if (s->compr == TIFF_LZW &&
              (i == s->height - 1 || i % s->rps == s->rps - 1)) {
              ret = ff_lzw_encode_flush(s->lzws, flush_put_bits);
              s->strip_sizes[(i / s->rps)] += ret;
              ptr                          += ret;
          }
      }
      if (s->compr == TIFF_LZW)
          av_freep(&s->lzws);
      }
  
      s->num_entries = 0;
  
      ADD_ENTRY1(s, TIFF_SUBFILE, TIFF_LONG, 0);
      ADD_ENTRY1(s, TIFF_WIDTH,   TIFF_LONG, s->width);
      ADD_ENTRY1(s, TIFF_HEIGHT,  TIFF_LONG, s->height);
  
      if (s->bpp_tab_size)
          ADD_ENTRY(s, TIFF_BPP, TIFF_SHORT, s->bpp_tab_size, bpp_tab);
  
      ADD_ENTRY1(s, TIFF_COMPR,       TIFF_SHORT, s->compr);
      ADD_ENTRY1(s, TIFF_PHOTOMETRIC, TIFF_SHORT, s->photometric_interpretation);
      ADD_ENTRY(s,  TIFF_STRIP_OFFS,  TIFF_LONG,  strips, s->strip_offsets);
  
      if (s->bpp_tab_size)
          ADD_ENTRY1(s, TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT, s->bpp_tab_size);
  
      ADD_ENTRY1(s, TIFF_ROWSPERSTRIP, TIFF_LONG,     s->rps);
      ADD_ENTRY(s,  TIFF_STRIP_SIZE,   TIFF_LONG,     strips, s->strip_sizes);
      ADD_ENTRY(s,  TIFF_XRES,         TIFF_RATIONAL, 1,      res);
      if (avctx->sample_aspect_ratio.num > 0 &&
          avctx->sample_aspect_ratio.den > 0) {
          AVRational y = av_mul_q(av_make_q(s->dpi, 1),
                                  avctx->sample_aspect_ratio);
          res[0] = y.num;
          res[1] = y.den;
      }
      ADD_ENTRY(s,  TIFF_YRES,         TIFF_RATIONAL, 1,      res);
      ADD_ENTRY1(s, TIFF_RES_UNIT,     TIFF_SHORT,    2);
  
      if (!(avctx->flags & CODEC_FLAG_BITEXACT))
          ADD_ENTRY(s, TIFF_SOFTWARE_NAME, TIFF_STRING,
                    strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT);
  
      if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
          uint16_t pal[256 * 3];
          for (i = 0; i < 256; i++) {
              uint32_t rgb = *(uint32_t *) (p->data[1] + i * 4);
              pal[i]       = ((rgb >> 16) & 0xff) * 257;
              pal[i + 256] = ((rgb >>  8) & 0xff) * 257;
              pal[i + 512] =  (rgb        & 0xff) * 257;
          }
          ADD_ENTRY(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal);
      }
      if (alpha)
          ADD_ENTRY1(s,TIFF_EXTRASAMPLES,      TIFF_SHORT,            2);
      if (is_yuv) {
          /** according to CCIR Recommendation 601.1 */
          uint32_t refbw[12] = { 15, 1, 235, 1, 128, 1, 240, 1, 128, 1, 240, 1 };
          ADD_ENTRY(s, TIFF_YCBCR_SUBSAMPLING, TIFF_SHORT,    2, s->subsampling);
          if (avctx->chroma_sample_location == AVCHROMA_LOC_TOPLEFT)
              ADD_ENTRY1(s, TIFF_YCBCR_POSITIONING, TIFF_SHORT, 2);
          ADD_ENTRY(s, TIFF_REFERENCE_BW,      TIFF_RATIONAL, 6, refbw);
      }
      // write offset to dir
      bytestream_put_le32(&offset, ptr - pkt->data);
  
      if (check_size(s, 6 + s->num_entries * 12)) {
          ret = AVERROR(EINVAL);
          goto fail;
      }
      bytestream_put_le16(&ptr, s->num_entries);  // write tag count
      bytestream_put_buffer(&ptr, s->entries, s->num_entries * 12);
      bytestream_put_le32(&ptr, 0);
  
      pkt->size   = ptr - pkt->data;
      pkt->flags |= AV_PKT_FLAG_KEY;
      *got_packet = 1;
  
  fail:
      return ret < 0 ? ret : 0;
  }
  
  static av_cold int encode_init(AVCodecContext *avctx)
  {
      TiffEncoderContext *s = avctx->priv_data;
  
      avctx->coded_frame = av_frame_alloc();
      if (!avctx->coded_frame)
          return AVERROR(ENOMEM);
  
      avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
      avctx->coded_frame->key_frame = 1;
      s->avctx = avctx;
  
      return 0;
  }
  
  static av_cold int encode_close(AVCodecContext *avctx)
  {
      TiffEncoderContext *s = avctx->priv_data;
  
      av_frame_free(&avctx->coded_frame);
      av_freep(&s->strip_sizes);
      av_freep(&s->strip_offsets);
      av_freep(&s->yuv_line);
  
      return 0;
  }
  
  #define OFFSET(x) offsetof(TiffEncoderContext, x)
  #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
  static const AVOption options[] = {
      {"dpi", "set the image resolution (in dpi)", OFFSET(dpi), AV_OPT_TYPE_INT, {.i64 = 72}, 1, 0x10000, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_ENCODING_PARAM},
      { "compression_algo", NULL, OFFSET(compr), AV_OPT_TYPE_INT,   { .i64 = TIFF_PACKBITS }, TIFF_RAW, TIFF_DEFLATE, VE, "compression_algo" },
      { "packbits",         NULL, 0,             AV_OPT_TYPE_CONST, { .i64 = TIFF_PACKBITS }, 0,        0,            VE, "compression_algo" },
      { "raw",              NULL, 0,             AV_OPT_TYPE_CONST, { .i64 = TIFF_RAW      }, 0,        0,            VE, "compression_algo" },
      { "lzw",              NULL, 0,             AV_OPT_TYPE_CONST, { .i64 = TIFF_LZW      }, 0,        0,            VE, "compression_algo" },
  #if CONFIG_ZLIB
      { "deflate",          NULL, 0,             AV_OPT_TYPE_CONST, { .i64 = TIFF_DEFLATE  }, 0,        0,            VE, "compression_algo" },
  #endif
      { NULL },
  };
  
  static const AVClass tiffenc_class = {
      .class_name = "TIFF encoder",
      .item_name  = av_default_item_name,
      .option     = options,
      .version    = LIBAVUTIL_VERSION_INT,
  };
  
  AVCodec ff_tiff_encoder = {
      .name           = "tiff",
      .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),
      .type           = AVMEDIA_TYPE_VIDEO,
      .id             = AV_CODEC_ID_TIFF,
      .priv_data_size = sizeof(TiffEncoderContext),
      .init           = encode_init,
      .close          = encode_close,
      .capabilities   = CODEC_CAP_FRAME_THREADS | CODEC_CAP_INTRA_ONLY,
      .encode2        = encode_frame,
      .pix_fmts       = (const enum AVPixelFormat[]) {
          AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48LE, AV_PIX_FMT_PAL8,
          AV_PIX_FMT_RGBA, AV_PIX_FMT_RGBA64LE,
          AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A, AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_YA16LE,
          AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_MONOWHITE,
          AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
          AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
          AV_PIX_FMT_NONE
      },
      .priv_class     = &tiffenc_class,
  };
  