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  1. /*
  2. * TIFF image encoder
  3. * Copyright (c) 2007 Bartlomiej Wolowiec
  4. *
  5. * This file is part of FFmpeg.
  6. *
  7. * FFmpeg is free software; you can redistribute it and/or
  8. * modify it under the terms of the GNU Lesser General Public
  9. * License as published by the Free Software Foundation; either
  10. * version 2.1 of the License, or (at your option) any later version.
  11. *
  12. * FFmpeg is distributed in the hope that it will be useful,
  13. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15. * Lesser General Public License for more details.
  16. *
  17. * You should have received a copy of the GNU Lesser General Public
  18. * License along with FFmpeg; if not, write to the Free Software
  19. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20. */
  21. /**
  22. * @file
  23. * TIFF image encoder
  24. * @author Bartlomiej Wolowiec
  25. */
  26. #include "libavutil/log.h"
  27. #include "libavutil/opt.h"
  28. #include "avcodec.h"
  29. #include "internal.h"
  30. #if CONFIG_ZLIB
  31. #include <zlib.h>
  32. #endif
  33. #include "libavutil/opt.h"
  34. #include "bytestream.h"
  35. #include "tiff.h"
  36. #include "rle.h"
  37. #include "lzw.h"
  38. #include "put_bits.h"
  39. #define TIFF_MAX_ENTRY 32
  40. /** sizes of various TIFF field types (string size = 1)*/
  41. static const uint8_t type_sizes2[6] = {
  42. 0, 1, 1, 2, 4, 8
  43. };
  44. typedef struct TiffEncoderContext {
  45. AVClass *class; ///< for private options
  46. AVCodecContext *avctx;
  47. AVFrame picture;
  48. int width; ///< picture width
  49. int height; ///< picture height
  50. unsigned int bpp; ///< bits per pixel
  51. int compr; ///< compression level
  52. int bpp_tab_size; ///< bpp_tab size
  53. int photometric_interpretation; ///< photometric interpretation
  54. int strips; ///< number of strips
  55. int rps; ///< row per strip
  56. uint8_t entries[TIFF_MAX_ENTRY*12]; ///< entires in header
  57. int num_entries; ///< number of entires
  58. uint8_t **buf; ///< actual position in buffer
  59. uint8_t *buf_start; ///< pointer to first byte in buffer
  60. int buf_size; ///< buffer size
  61. uint16_t subsampling[2]; ///< YUV subsampling factors
  62. struct LZWEncodeState *lzws; ///< LZW Encode state
  63. uint32_t dpi; ///< image resolution in DPI
  64. } TiffEncoderContext;
  65. /**
  66. * Check free space in buffer
  67. * @param s Tiff context
  68. * @param need Needed bytes
  69. * @return 0 - ok, 1 - no free space
  70. */
  71. static inline int check_size(TiffEncoderContext * s, uint64_t need)
  72. {
  73. if (s->buf_size < *s->buf - s->buf_start + need) {
  74. *s->buf = s->buf_start + s->buf_size + 1;
  75. av_log(s->avctx, AV_LOG_ERROR, "Buffer is too small\n");
  76. return 1;
  77. }
  78. return 0;
  79. }
  80. /**
  81. * Put n values to buffer
  82. *
  83. * @param p Pointer to pointer to output buffer
  84. * @param n Number of values
  85. * @param val Pointer to values
  86. * @param type Type of values
  87. * @param flip =0 - normal copy, >0 - flip
  88. */
  89. static void tnput(uint8_t ** p, int n, const uint8_t * val, enum TiffTypes type,
  90. int flip)
  91. {
  92. int i;
  93. #if HAVE_BIGENDIAN
  94. flip ^= ((int[]) {0, 0, 0, 1, 3, 3})[type];
  95. #endif
  96. for (i = 0; i < n * type_sizes2[type]; i++)
  97. *(*p)++ = val[i ^ flip];
  98. }
  99. /**
  100. * Add entry to directory in tiff header.
  101. * @param s Tiff context
  102. * @param tag Tag that identifies the entry
  103. * @param type Entry type
  104. * @param count The number of values
  105. * @param ptr_val Pointer to values
  106. */
  107. static void add_entry(TiffEncoderContext * s,
  108. enum TiffTags tag, enum TiffTypes type, int count,
  109. const void *ptr_val)
  110. {
  111. uint8_t *entries_ptr = s->entries + 12 * s->num_entries;
  112. assert(s->num_entries < TIFF_MAX_ENTRY);
  113. bytestream_put_le16(&entries_ptr, tag);
  114. bytestream_put_le16(&entries_ptr, type);
  115. bytestream_put_le32(&entries_ptr, count);
  116. if (type_sizes[type] * count <= 4) {
  117. tnput(&entries_ptr, count, ptr_val, type, 0);
  118. } else {
  119. bytestream_put_le32(&entries_ptr, *s->buf - s->buf_start);
  120. check_size(s, count * type_sizes2[type]);
  121. tnput(s->buf, count, ptr_val, type, 0);
  122. }
  123. s->num_entries++;
  124. }
  125. static void add_entry1(TiffEncoderContext * s,
  126. enum TiffTags tag, enum TiffTypes type, int val){
  127. uint16_t w = val;
  128. uint32_t dw= val;
  129. add_entry(s, tag, type, 1, type == TIFF_SHORT ? (void *)&w : (void *)&dw);
  130. }
  131. /**
  132. * Encode one strip in tiff file
  133. *
  134. * @param s Tiff context
  135. * @param src Input buffer
  136. * @param dst Output buffer
  137. * @param n Size of input buffer
  138. * @param compr Compression method
  139. * @return Number of output bytes. If an output error is encountered, -1 returned
  140. */
  141. static int encode_strip(TiffEncoderContext * s, const int8_t * src,
  142. uint8_t * dst, int n, int compr)
  143. {
  144. switch (compr) {
  145. #if CONFIG_ZLIB
  146. case TIFF_DEFLATE:
  147. case TIFF_ADOBE_DEFLATE:
  148. {
  149. unsigned long zlen = s->buf_size - (*s->buf - s->buf_start);
  150. if (compress(dst, &zlen, src, n) != Z_OK) {
  151. av_log(s->avctx, AV_LOG_ERROR, "Compressing failed\n");
  152. return -1;
  153. }
  154. return zlen;
  155. }
  156. #endif
  157. case TIFF_RAW:
  158. if (check_size(s, n))
  159. return -1;
  160. memcpy(dst, src, n);
  161. return n;
  162. case TIFF_PACKBITS:
  163. return ff_rle_encode(dst, s->buf_size - (*s->buf - s->buf_start), src, 1, n, 2, 0xff, -1, 0);
  164. case TIFF_LZW:
  165. return ff_lzw_encode(s->lzws, src, n);
  166. default:
  167. return -1;
  168. }
  169. }
  170. static void pack_yuv(TiffEncoderContext * s, uint8_t * dst, int lnum)
  171. {
  172. AVFrame *p = &s->picture;
  173. int i, j, k;
  174. int w = (s->width - 1) / s->subsampling[0] + 1;
  175. uint8_t *pu = &p->data[1][lnum / s->subsampling[1] * p->linesize[1]];
  176. uint8_t *pv = &p->data[2][lnum / s->subsampling[1] * p->linesize[2]];
  177. if(s->width % s->subsampling[0] || s->height % s->subsampling[1]){
  178. for (i = 0; i < w; i++){
  179. for (j = 0; j < s->subsampling[1]; j++)
  180. for (k = 0; k < s->subsampling[0]; k++)
  181. *dst++ = p->data[0][FFMIN(lnum + j, s->height-1) * p->linesize[0] +
  182. FFMIN(i * s->subsampling[0] + k, s->width-1)];
  183. *dst++ = *pu++;
  184. *dst++ = *pv++;
  185. }
  186. }else{
  187. for (i = 0; i < w; i++){
  188. for (j = 0; j < s->subsampling[1]; j++)
  189. for (k = 0; k < s->subsampling[0]; k++)
  190. *dst++ = p->data[0][(lnum + j) * p->linesize[0] +
  191. i * s->subsampling[0] + k];
  192. *dst++ = *pu++;
  193. *dst++ = *pv++;
  194. }
  195. }
  196. }
  197. static int encode_frame(AVCodecContext * avctx, AVPacket *pkt,
  198. const AVFrame *pict, int *got_packet)
  199. {
  200. TiffEncoderContext *s = avctx->priv_data;
  201. AVFrame *const p = &s->picture;
  202. int i;
  203. uint8_t *ptr;
  204. uint8_t *offset;
  205. uint32_t strips;
  206. uint32_t *strip_sizes = NULL;
  207. uint32_t *strip_offsets = NULL;
  208. int bytes_per_row;
  209. uint32_t res[2] = { s->dpi, 1 }; // image resolution (72/1)
  210. uint16_t bpp_tab[] = { 8, 8, 8, 8 };
  211. int ret = -1;
  212. int is_yuv = 0;
  213. uint8_t *yuv_line = NULL;
  214. int shift_h, shift_v;
  215. s->avctx = avctx;
  216. *p = *pict;
  217. p->pict_type = AV_PICTURE_TYPE_I;
  218. p->key_frame = 1;
  219. avctx->coded_frame= &s->picture;
  220. s->width = avctx->width;
  221. s->height = avctx->height;
  222. s->subsampling[0] = 1;
  223. s->subsampling[1] = 1;
  224. switch (avctx->pix_fmt) {
  225. case PIX_FMT_RGBA64LE:
  226. s->bpp = 64;
  227. s->photometric_interpretation = 2;
  228. bpp_tab[0] = 16;
  229. bpp_tab[1] = 16;
  230. bpp_tab[2] = 16;
  231. bpp_tab[3] = 16;
  232. break;
  233. case PIX_FMT_RGB48LE:
  234. s->bpp = 48;
  235. s->photometric_interpretation = 2;
  236. bpp_tab[0] = 16;
  237. bpp_tab[1] = 16;
  238. bpp_tab[2] = 16;
  239. bpp_tab[3] = 16;
  240. break;
  241. case PIX_FMT_RGBA:
  242. avctx->bits_per_coded_sample =
  243. s->bpp = 32;
  244. s->photometric_interpretation = 2;
  245. break;
  246. case PIX_FMT_RGB24:
  247. avctx->bits_per_coded_sample =
  248. s->bpp = 24;
  249. s->photometric_interpretation = 2;
  250. break;
  251. case PIX_FMT_GRAY8:
  252. avctx->bits_per_coded_sample = 0x28;
  253. s->bpp = 8;
  254. s->photometric_interpretation = 1;
  255. break;
  256. case PIX_FMT_PAL8:
  257. avctx->bits_per_coded_sample =
  258. s->bpp = 8;
  259. s->photometric_interpretation = 3;
  260. break;
  261. case PIX_FMT_MONOBLACK:
  262. case PIX_FMT_MONOWHITE:
  263. avctx->bits_per_coded_sample =
  264. s->bpp = 1;
  265. s->photometric_interpretation = avctx->pix_fmt == PIX_FMT_MONOBLACK;
  266. bpp_tab[0] = 1;
  267. break;
  268. case PIX_FMT_YUV420P:
  269. case PIX_FMT_YUV422P:
  270. case PIX_FMT_YUV444P:
  271. case PIX_FMT_YUV410P:
  272. case PIX_FMT_YUV411P:
  273. s->photometric_interpretation = 6;
  274. avcodec_get_chroma_sub_sample(avctx->pix_fmt,
  275. &shift_h, &shift_v);
  276. s->bpp = 8 + (16 >> (shift_h + shift_v));
  277. s->subsampling[0] = 1 << shift_h;
  278. s->subsampling[1] = 1 << shift_v;
  279. s->bpp_tab_size = 3;
  280. is_yuv = 1;
  281. break;
  282. default:
  283. av_log(s->avctx, AV_LOG_ERROR,
  284. "This colors format is not supported\n");
  285. return -1;
  286. }
  287. if (!is_yuv)
  288. s->bpp_tab_size = (s->bpp >= 48) ? ((s->bpp + 7) >> 4):((s->bpp + 7) >> 3);
  289. if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE || s->compr == TIFF_LZW)
  290. //best choose for DEFLATE
  291. s->rps = s->height;
  292. else
  293. s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1); // suggest size of strip
  294. s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1]; // round rps up
  295. strips = (s->height - 1) / s->rps + 1;
  296. if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width * avctx->height * s->bpp * 2 +
  297. avctx->height * 4 + FF_MIN_BUFFER_SIZE)) < 0)
  298. return ret;
  299. ptr = pkt->data;
  300. s->buf_start = pkt->data;
  301. s->buf = &ptr;
  302. s->buf_size = pkt->size;
  303. if (check_size(s, 8))
  304. goto fail;
  305. // write header
  306. bytestream_put_le16(&ptr, 0x4949);
  307. bytestream_put_le16(&ptr, 42);
  308. offset = ptr;
  309. bytestream_put_le32(&ptr, 0);
  310. strip_sizes = av_mallocz(sizeof(*strip_sizes) * strips);
  311. strip_offsets = av_mallocz(sizeof(*strip_offsets) * strips);
  312. bytes_per_row = (((s->width - 1)/s->subsampling[0] + 1) * s->bpp
  313. * s->subsampling[0] * s->subsampling[1] + 7) >> 3;
  314. if (is_yuv){
  315. yuv_line = av_malloc(bytes_per_row);
  316. if (yuv_line == NULL){
  317. av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");
  318. goto fail;
  319. }
  320. }
  321. #if CONFIG_ZLIB
  322. if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
  323. uint8_t *zbuf;
  324. int zlen, zn;
  325. int j;
  326. zlen = bytes_per_row * s->rps;
  327. zbuf = av_malloc(zlen);
  328. strip_offsets[0] = ptr - pkt->data;
  329. zn = 0;
  330. for (j = 0; j < s->rps; j++) {
  331. if (is_yuv){
  332. pack_yuv(s, yuv_line, j);
  333. memcpy(zbuf + zn, yuv_line, bytes_per_row);
  334. j += s->subsampling[1] - 1;
  335. }
  336. else
  337. memcpy(zbuf + j * bytes_per_row,
  338. p->data[0] + j * p->linesize[0], bytes_per_row);
  339. zn += bytes_per_row;
  340. }
  341. ret = encode_strip(s, zbuf, ptr, zn, s->compr);
  342. av_free(zbuf);
  343. if (ret < 0) {
  344. av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
  345. goto fail;
  346. }
  347. ptr += ret;
  348. strip_sizes[0] = ptr - pkt->data - strip_offsets[0];
  349. } else
  350. #endif
  351. {
  352. if(s->compr == TIFF_LZW)
  353. s->lzws = av_malloc(ff_lzw_encode_state_size);
  354. for (i = 0; i < s->height; i++) {
  355. if (strip_sizes[i / s->rps] == 0) {
  356. if(s->compr == TIFF_LZW){
  357. ff_lzw_encode_init(s->lzws, ptr, s->buf_size - (*s->buf - s->buf_start),
  358. 12, FF_LZW_TIFF, put_bits);
  359. }
  360. strip_offsets[i / s->rps] = ptr - pkt->data;
  361. }
  362. if (is_yuv){
  363. pack_yuv(s, yuv_line, i);
  364. ret = encode_strip(s, yuv_line, ptr, bytes_per_row, s->compr);
  365. i += s->subsampling[1] - 1;
  366. }
  367. else
  368. ret = encode_strip(s, p->data[0] + i * p->linesize[0],
  369. ptr, bytes_per_row, s->compr);
  370. if (ret < 0) {
  371. av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
  372. goto fail;
  373. }
  374. strip_sizes[i / s->rps] += ret;
  375. ptr += ret;
  376. if(s->compr == TIFF_LZW && (i==s->height-1 || i%s->rps == s->rps-1)){
  377. ret = ff_lzw_encode_flush(s->lzws, flush_put_bits);
  378. strip_sizes[(i / s->rps )] += ret ;
  379. ptr += ret;
  380. }
  381. }
  382. if(s->compr == TIFF_LZW)
  383. av_free(s->lzws);
  384. }
  385. s->num_entries = 0;
  386. add_entry1(s,TIFF_SUBFILE, TIFF_LONG, 0);
  387. add_entry1(s,TIFF_WIDTH, TIFF_LONG, s->width);
  388. add_entry1(s,TIFF_HEIGHT, TIFF_LONG, s->height);
  389. if (s->bpp_tab_size)
  390. add_entry(s, TIFF_BPP, TIFF_SHORT, s->bpp_tab_size, bpp_tab);
  391. add_entry1(s,TIFF_COMPR, TIFF_SHORT, s->compr);
  392. add_entry1(s,TIFF_INVERT, TIFF_SHORT, s->photometric_interpretation);
  393. add_entry(s, TIFF_STRIP_OFFS, TIFF_LONG, strips, strip_offsets);
  394. if (s->bpp_tab_size)
  395. add_entry1(s,TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT, s->bpp_tab_size);
  396. add_entry1(s,TIFF_ROWSPERSTRIP, TIFF_LONG, s->rps);
  397. add_entry(s, TIFF_STRIP_SIZE, TIFF_LONG, strips, strip_sizes);
  398. add_entry(s, TIFF_XRES, TIFF_RATIONAL, 1, res);
  399. add_entry(s, TIFF_YRES, TIFF_RATIONAL, 1, res);
  400. add_entry1(s,TIFF_RES_UNIT, TIFF_SHORT, 2);
  401. if(!(avctx->flags & CODEC_FLAG_BITEXACT))
  402. add_entry(s, TIFF_SOFTWARE_NAME, TIFF_STRING,
  403. strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT);
  404. if (avctx->pix_fmt == PIX_FMT_PAL8) {
  405. uint16_t pal[256 * 3];
  406. for (i = 0; i < 256; i++) {
  407. uint32_t rgb = *(uint32_t *) (p->data[1] + i * 4);
  408. pal[i] = ((rgb >> 16) & 0xff) * 257;
  409. pal[i + 256] = ((rgb >> 8 ) & 0xff) * 257;
  410. pal[i + 512] = ( rgb & 0xff) * 257;
  411. }
  412. add_entry(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal);
  413. }
  414. if (is_yuv){
  415. /** according to CCIR Recommendation 601.1 */
  416. uint32_t refbw[12] = {15, 1, 235, 1, 128, 1, 240, 1, 128, 1, 240, 1};
  417. add_entry(s, TIFF_YCBCR_SUBSAMPLING, TIFF_SHORT, 2, s->subsampling);
  418. add_entry(s, TIFF_REFERENCE_BW, TIFF_RATIONAL, 6, refbw);
  419. }
  420. bytestream_put_le32(&offset, ptr - pkt->data); // write offset to dir
  421. if (check_size(s, 6 + s->num_entries * 12)) {
  422. ret = AVERROR(EINVAL);
  423. goto fail;
  424. }
  425. bytestream_put_le16(&ptr, s->num_entries); // write tag count
  426. bytestream_put_buffer(&ptr, s->entries, s->num_entries * 12);
  427. bytestream_put_le32(&ptr, 0);
  428. pkt->size = ptr - pkt->data;
  429. pkt->flags |= AV_PKT_FLAG_KEY;
  430. *got_packet = 1;
  431. fail:
  432. av_free(strip_sizes);
  433. av_free(strip_offsets);
  434. av_free(yuv_line);
  435. return ret < 0 ? ret : 0;
  436. }
  437. #define OFFSET(x) offsetof(TiffEncoderContext, x)
  438. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
  439. static const AVOption options[] = {
  440. {"dpi", "set the image resolution (in dpi)", OFFSET(dpi), AV_OPT_TYPE_INT, {.dbl = 72}, 1, 0x10000, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_ENCODING_PARAM},
  441. { "compression_algo", NULL, OFFSET(compr), AV_OPT_TYPE_INT, {TIFF_PACKBITS}, TIFF_RAW, TIFF_DEFLATE, VE, "compression_algo" },
  442. { "packbits", NULL, 0, AV_OPT_TYPE_CONST, {TIFF_PACKBITS}, 0, 0, VE, "compression_algo" },
  443. { "raw", NULL, 0, AV_OPT_TYPE_CONST, {TIFF_RAW}, 0, 0, VE, "compression_algo" },
  444. { "lzw", NULL, 0, AV_OPT_TYPE_CONST, {TIFF_LZW}, 0, 0, VE, "compression_algo" },
  445. #if CONFIG_ZLIB
  446. { "deflate", NULL, 0, AV_OPT_TYPE_CONST, {TIFF_DEFLATE}, 0, 0, VE, "compression_algo" },
  447. #endif
  448. { NULL },
  449. };
  450. static const AVClass tiffenc_class = {
  451. .class_name = "TIFF encoder",
  452. .item_name = av_default_item_name,
  453. .option = options,
  454. .version = LIBAVUTIL_VERSION_INT,
  455. };
  456. AVCodec ff_tiff_encoder = {
  457. .name = "tiff",
  458. .type = AVMEDIA_TYPE_VIDEO,
  459. .id = CODEC_ID_TIFF,
  460. .priv_data_size = sizeof(TiffEncoderContext),
  461. .encode2 = encode_frame,
  462. .pix_fmts = (const enum PixelFormat[]) {
  463. PIX_FMT_RGB24, PIX_FMT_PAL8, PIX_FMT_GRAY8,
  464. PIX_FMT_MONOBLACK, PIX_FMT_MONOWHITE,
  465. PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P,
  466. PIX_FMT_YUV410P, PIX_FMT_YUV411P, PIX_FMT_RGB48LE,
  467. PIX_FMT_RGBA, PIX_FMT_RGBA64LE,
  468. PIX_FMT_NONE
  469. },
  470. .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
  471. .priv_class = &tiffenc_class,
  472. };