169360fdff7fb5e03ec1671b321f6352b6f79be8
[libav.git] / libavcodec / tiffenc.c
1 /*
2 * TIFF image encoder
3 * Copyright (c) 2007 Bartlomiej Wolowiec
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * TIFF image encoder
25 * @author Bartlomiej Wolowiec
26 */
27
28 #include "config.h"
29 #if CONFIG_ZLIB
30 #include <zlib.h>
31 #endif
32
33 #include "libavutil/log.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/pixdesc.h"
36 #include "avcodec.h"
37 #include "bytestream.h"
38 #include "lzw.h"
39 #include "put_bits.h"
40 #include "rle.h"
41 #include "tiff.h"
42
43 #define TIFF_MAX_ENTRY 32
44
45 /** sizes of various TIFF field types (string size = 1)*/
46 static const uint8_t type_sizes2[6] = {
47 0, 1, 1, 2, 4, 8
48 };
49
50 typedef struct TiffEncoderContext {
51 AVClass *class; ///< for private options
52 AVCodecContext *avctx;
53
54 int width; ///< picture width
55 int height; ///< picture height
56 unsigned int bpp; ///< bits per pixel
57 int compr; ///< compression level
58 int bpp_tab_size; ///< bpp_tab size
59 enum TiffPhotometric photometric_interpretation; ///< photometric interpretation
60 int strips; ///< number of strips
61 int rps; ///< row per strip
62 uint8_t entries[TIFF_MAX_ENTRY * 12]; ///< entries in header
63 int num_entries; ///< number of entries
64 uint8_t **buf; ///< actual position in buffer
65 uint8_t *buf_start; ///< pointer to first byte in buffer
66 int buf_size; ///< buffer size
67 uint16_t subsampling[2]; ///< YUV subsampling factors
68 struct LZWEncodeState *lzws; ///< LZW encode state
69 } TiffEncoderContext;
70
71 /**
72 * Check free space in buffer
73 * @param s Tiff context
74 * @param need Needed bytes
75 * @return 0 - ok, 1 - no free space
76 */
77 static inline int check_size(TiffEncoderContext *s, uint64_t need)
78 {
79 if (s->buf_size < *s->buf - s->buf_start + need) {
80 *s->buf = s->buf_start + s->buf_size + 1;
81 av_log(s->avctx, AV_LOG_ERROR, "Buffer is too small\n");
82 return 1;
83 }
84 return 0;
85 }
86
87 /**
88 * Put n values to buffer
89 *
90 * @param p Pointer to pointer to output buffer
91 * @param n Number of values
92 * @param val Pointer to values
93 * @param type Type of values
94 * @param flip =0 - normal copy, >0 - flip
95 */
96 static void tnput(uint8_t **p, int n, const uint8_t *val, enum TiffTypes type,
97 int flip)
98 {
99 int i;
100 #if HAVE_BIGENDIAN
101 flip ^= ((int[]) { 0, 0, 0, 1, 3, 3 })[type];
102 #endif
103 for (i = 0; i < n * type_sizes2[type]; i++)
104 *(*p)++ = val[i ^ flip];
105 }
106
107 /**
108 * Add entry to directory in tiff header.
109 * @param s Tiff context
110 * @param tag Tag that identifies the entry
111 * @param type Entry type
112 * @param count The number of values
113 * @param ptr_val Pointer to values
114 */
115 static int add_entry(TiffEncoderContext *s, enum TiffTags tag,
116 enum TiffTypes type, int count, const void *ptr_val)
117 {
118 uint8_t *entries_ptr = s->entries + 12 * s->num_entries;
119
120 assert(s->num_entries < TIFF_MAX_ENTRY);
121
122 bytestream_put_le16(&entries_ptr, tag);
123 bytestream_put_le16(&entries_ptr, type);
124 bytestream_put_le32(&entries_ptr, count);
125
126 if (type_sizes[type] * count <= 4) {
127 tnput(&entries_ptr, count, ptr_val, type, 0);
128 } else {
129 bytestream_put_le32(&entries_ptr, *s->buf - s->buf_start);
130 if (check_size(s, count * type_sizes2[type]))
131 return AVERROR_INVALIDDATA;
132 tnput(s->buf, count, ptr_val, type, 0);
133 }
134
135 s->num_entries++;
136 return 0;
137 }
138
139 static int add_entry1(TiffEncoderContext *s,
140 enum TiffTags tag, enum TiffTypes type, int val)
141 {
142 uint16_t w = val;
143 uint32_t dw = val;
144 return add_entry(s, tag, type, 1,
145 type == TIFF_SHORT ? (void *)&w : (void *)&dw);
146 }
147
148 /**
149 * Encode one strip in tiff file
150 *
151 * @param s Tiff context
152 * @param src Input buffer
153 * @param dst Output buffer
154 * @param n Size of input buffer
155 * @param compr Compression method
156 * @return Number of output bytes. If an output error is encountered, -1 returned
157 */
158 static int encode_strip(TiffEncoderContext *s, const int8_t *src,
159 uint8_t *dst, int n, int compr)
160 {
161 switch (compr) {
162 #if CONFIG_ZLIB
163 case TIFF_DEFLATE:
164 case TIFF_ADOBE_DEFLATE:
165 {
166 unsigned long zlen = s->buf_size - (*s->buf - s->buf_start);
167 if (compress(dst, &zlen, src, n) != Z_OK) {
168 av_log(s->avctx, AV_LOG_ERROR, "Compressing failed\n");
169 return -1;
170 }
171 return zlen;
172 }
173 #endif
174 case TIFF_RAW:
175 if (check_size(s, n))
176 return -1;
177 memcpy(dst, src, n);
178 return n;
179 case TIFF_PACKBITS:
180 return ff_rle_encode(dst, s->buf_size - (*s->buf - s->buf_start),
181 src, 1, n, 2, 0xff, -1, 0);
182 case TIFF_LZW:
183 return ff_lzw_encode(s->lzws, src, n);
184 default:
185 return -1;
186 }
187 }
188
189 static void pack_yuv(TiffEncoderContext *s, const AVFrame *p,
190 uint8_t *dst, int lnum)
191 {
192 int i, j, k;
193 int w = (s->width - 1) / s->subsampling[0] + 1;
194 uint8_t *pu = &p->data[1][lnum / s->subsampling[1] * p->linesize[1]];
195 uint8_t *pv = &p->data[2][lnum / s->subsampling[1] * p->linesize[2]];
196 for (i = 0; i < w; i++) {
197 for (j = 0; j < s->subsampling[1]; j++)
198 for (k = 0; k < s->subsampling[0]; k++)
199 *dst++ = p->data[0][(lnum + j) * p->linesize[0] +
200 i * s->subsampling[0] + k];
201 *dst++ = *pu++;
202 *dst++ = *pv++;
203 }
204 }
205
206 #define ADD_ENTRY(s, tag, type, count, ptr_val) \
207 do { \
208 ret = add_entry(s, tag, type, count, ptr_val); \
209 if (ret < 0) \
210 goto fail; \
211 } while(0);
212
213 #define ADD_ENTRY1(s, tag, type, val) \
214 do { \
215 ret = add_entry1(s, tag, type, val); \
216 if (ret < 0) \
217 goto fail; \
218 } while(0);
219
220 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
221 const AVFrame *pict, int *got_packet)
222 {
223 TiffEncoderContext *s = avctx->priv_data;
224 const AVFrame *const p = pict;
225 int i;
226 uint8_t *ptr;
227 uint8_t *offset;
228 uint32_t strips;
229 uint32_t *strip_sizes = NULL;
230 uint32_t *strip_offsets = NULL;
231 int bytes_per_row;
232 uint32_t res[2] = { 72, 1 }; // image resolution (72/1)
233 uint16_t bpp_tab[] = { 8, 8, 8, 8 };
234 int ret = 0;
235 int is_yuv = 0;
236 uint8_t *yuv_line = NULL;
237 int shift_h, shift_v;
238 int packet_size;
239 const AVPixFmtDescriptor *pfd;
240
241 s->avctx = avctx;
242
243 s->width = avctx->width;
244 s->height = avctx->height;
245 s->subsampling[0] = 1;
246 s->subsampling[1] = 1;
247
248 switch (avctx->pix_fmt) {
249 case AV_PIX_FMT_RGBA64LE:
250 case AV_PIX_FMT_RGB48LE:
251 case AV_PIX_FMT_GRAY16LE:
252 case AV_PIX_FMT_RGBA:
253 case AV_PIX_FMT_RGB24:
254 case AV_PIX_FMT_GRAY8:
255 case AV_PIX_FMT_PAL8:
256 pfd = av_pix_fmt_desc_get(avctx->pix_fmt);
257 s->bpp = av_get_bits_per_pixel(pfd);
258 if (pfd->flags & AV_PIX_FMT_FLAG_PAL)
259 s->photometric_interpretation = TIFF_PHOTOMETRIC_PALETTE;
260 else if (pfd->flags & AV_PIX_FMT_FLAG_RGB)
261 s->photometric_interpretation = TIFF_PHOTOMETRIC_RGB;
262 else
263 s->photometric_interpretation = TIFF_PHOTOMETRIC_BLACK_IS_ZERO;
264 s->bpp_tab_size = pfd->nb_components;
265 for (i = 0; i < s->bpp_tab_size; i++)
266 bpp_tab[i] = s->bpp / s->bpp_tab_size;
267 break;
268 case AV_PIX_FMT_MONOBLACK:
269 s->bpp = 1;
270 s->photometric_interpretation = TIFF_PHOTOMETRIC_BLACK_IS_ZERO;
271 s->bpp_tab_size = 0;
272 break;
273 case AV_PIX_FMT_MONOWHITE:
274 s->bpp = 1;
275 s->photometric_interpretation = TIFF_PHOTOMETRIC_WHITE_IS_ZERO;
276 s->bpp_tab_size = 0;
277 break;
278 case AV_PIX_FMT_YUV420P:
279 case AV_PIX_FMT_YUV422P:
280 case AV_PIX_FMT_YUV444P:
281 case AV_PIX_FMT_YUV410P:
282 case AV_PIX_FMT_YUV411P:
283 av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &shift_h, &shift_v);
284 s->photometric_interpretation = TIFF_PHOTOMETRIC_YCBCR;
285 s->bpp = 8 + (16 >> (shift_h + shift_v));
286 s->subsampling[0] = 1 << shift_h;
287 s->subsampling[1] = 1 << shift_v;
288 s->bpp_tab_size = 3;
289 is_yuv = 1;
290 break;
291 default:
292 av_log(s->avctx, AV_LOG_ERROR,
293 "This colors format is not supported\n");
294 return -1;
295 }
296
297 if (s->compr == TIFF_DEFLATE ||
298 s->compr == TIFF_ADOBE_DEFLATE ||
299 s->compr == TIFF_LZW)
300 // best choice for DEFLATE
301 s->rps = s->height;
302 else
303 // suggest size of strip
304 s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1);
305 // round rps up
306 s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1];
307
308 strips = (s->height - 1) / s->rps + 1;
309
310 packet_size = avctx->height * ((avctx->width * s->bpp + 7) >> 3) * 2 +
311 avctx->height * 4 + FF_MIN_BUFFER_SIZE;
312
313 if (!pkt->data &&
314 (ret = av_new_packet(pkt, packet_size)) < 0) {
315 av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
316 return ret;
317 }
318 ptr = pkt->data;
319 s->buf_start = pkt->data;
320 s->buf = &ptr;
321 s->buf_size = pkt->size;
322
323 if (check_size(s, 8)) {
324 ret = AVERROR(EINVAL);
325 goto fail;
326 }
327
328 // write header
329 bytestream_put_le16(&ptr, 0x4949);
330 bytestream_put_le16(&ptr, 42);
331
332 offset = ptr;
333 bytestream_put_le32(&ptr, 0);
334
335 strip_sizes = av_mallocz_array(strips, sizeof(*strip_sizes));
336 strip_offsets = av_mallocz_array(strips, sizeof(*strip_offsets));
337 if (!strip_sizes || !strip_offsets) {
338 ret = AVERROR(ENOMEM);
339 goto fail;
340 }
341
342 bytes_per_row = (((s->width - 1) / s->subsampling[0] + 1) * s->bpp *
343 s->subsampling[0] * s->subsampling[1] + 7) >> 3;
344 if (is_yuv) {
345 yuv_line = av_malloc(bytes_per_row);
346 if (!yuv_line) {
347 av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");
348 ret = AVERROR(ENOMEM);
349 goto fail;
350 }
351 }
352
353 #if CONFIG_ZLIB
354 if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
355 uint8_t *zbuf;
356 int zlen, zn;
357 int j;
358
359 zlen = bytes_per_row * s->rps;
360 zbuf = av_malloc(zlen);
361 if (!zbuf) {
362 ret = AVERROR(ENOMEM);
363 goto fail;
364 }
365 strip_offsets[0] = ptr - pkt->data;
366 zn = 0;
367 for (j = 0; j < s->rps; j++) {
368 if (is_yuv) {
369 pack_yuv(s, p, yuv_line, j);
370 memcpy(zbuf + zn, yuv_line, bytes_per_row);
371 j += s->subsampling[1] - 1;
372 } else
373 memcpy(zbuf + j * bytes_per_row,
374 p->data[0] + j * p->linesize[0], bytes_per_row);
375 zn += bytes_per_row;
376 }
377 ret = encode_strip(s, zbuf, ptr, zn, s->compr);
378 av_free(zbuf);
379 if (ret < 0) {
380 av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
381 goto fail;
382 }
383 ptr += ret;
384 strip_sizes[0] = ptr - pkt->data - strip_offsets[0];
385 } else
386 #endif
387 if (s->compr == TIFF_LZW) {
388 s->lzws = av_malloc(ff_lzw_encode_state_size);
389 if (!s->lzws) {
390 ret = AVERROR(ENOMEM);
391 goto fail;
392 }
393 }
394 for (i = 0; i < s->height; i++) {
395 if (strip_sizes[i / s->rps] == 0) {
396 if (s->compr == TIFF_LZW) {
397 ff_lzw_encode_init(s->lzws, ptr,
398 s->buf_size - (*s->buf - s->buf_start),
399 12, FF_LZW_TIFF, put_bits);
400 }
401 strip_offsets[i / s->rps] = ptr - pkt->data;
402 }
403 if (is_yuv) {
404 pack_yuv(s, p, yuv_line, i);
405 ret = encode_strip(s, yuv_line, ptr, bytes_per_row, s->compr);
406 i += s->subsampling[1] - 1;
407 } else
408 ret = encode_strip(s, p->data[0] + i * p->linesize[0],
409 ptr, bytes_per_row, s->compr);
410 if (ret < 0) {
411 av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
412 goto fail;
413 }
414 strip_sizes[i / s->rps] += ret;
415 ptr += ret;
416 if (s->compr == TIFF_LZW &&
417 (i == s->height - 1 || i % s->rps == s->rps - 1)) {
418 ret = ff_lzw_encode_flush(s->lzws, flush_put_bits);
419 strip_sizes[(i / s->rps)] += ret;
420 ptr += ret;
421 }
422 }
423 if (s->compr == TIFF_LZW)
424 av_free(s->lzws);
425
426 s->num_entries = 0;
427
428 ADD_ENTRY1(s, TIFF_SUBFILE, TIFF_LONG, 0);
429 ADD_ENTRY1(s, TIFF_WIDTH, TIFF_LONG, s->width);
430 ADD_ENTRY1(s, TIFF_HEIGHT, TIFF_LONG, s->height);
431
432 if (s->bpp_tab_size)
433 ADD_ENTRY(s, TIFF_BPP, TIFF_SHORT, s->bpp_tab_size, bpp_tab);
434
435 ADD_ENTRY1(s, TIFF_COMPR, TIFF_SHORT, s->compr);
436 ADD_ENTRY1(s, TIFF_PHOTOMETRIC, TIFF_SHORT, s->photometric_interpretation);
437 ADD_ENTRY(s, TIFF_STRIP_OFFS, TIFF_LONG, strips, strip_offsets);
438
439 if (s->bpp_tab_size)
440 ADD_ENTRY1(s, TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT, s->bpp_tab_size);
441
442 ADD_ENTRY1(s, TIFF_ROWSPERSTRIP, TIFF_LONG, s->rps);
443 ADD_ENTRY(s, TIFF_STRIP_SIZE, TIFF_LONG, strips, strip_sizes);
444 ADD_ENTRY(s, TIFF_XRES, TIFF_RATIONAL, 1, res);
445 ADD_ENTRY(s, TIFF_YRES, TIFF_RATIONAL, 1, res);
446 ADD_ENTRY1(s, TIFF_RES_UNIT, TIFF_SHORT, 2);
447
448 if (!(avctx->flags & CODEC_FLAG_BITEXACT))
449 ADD_ENTRY(s, TIFF_SOFTWARE_NAME, TIFF_STRING,
450 strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT);
451
452 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
453 uint16_t pal[256 * 3];
454 for (i = 0; i < 256; i++) {
455 uint32_t rgb = *(uint32_t *) (p->data[1] + i * 4);
456 pal[i] = ((rgb >> 16) & 0xff) * 257;
457 pal[i + 256] = ((rgb >> 8) & 0xff) * 257;
458 pal[i + 512] = (rgb & 0xff) * 257;
459 }
460 ADD_ENTRY(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal);
461 }
462 if (is_yuv) {
463 /** according to CCIR Recommendation 601.1 */
464 uint32_t refbw[12] = { 15, 1, 235, 1, 128, 1, 240, 1, 128, 1, 240, 1 };
465 ADD_ENTRY(s, TIFF_YCBCR_SUBSAMPLING, TIFF_SHORT, 2, s->subsampling);
466 ADD_ENTRY(s, TIFF_REFERENCE_BW, TIFF_RATIONAL, 6, refbw);
467 }
468 // write offset to dir
469 bytestream_put_le32(&offset, ptr - pkt->data);
470
471 if (check_size(s, 6 + s->num_entries * 12)) {
472 ret = AVERROR(EINVAL);
473 goto fail;
474 }
475 bytestream_put_le16(&ptr, s->num_entries); // write tag count
476 bytestream_put_buffer(&ptr, s->entries, s->num_entries * 12);
477 bytestream_put_le32(&ptr, 0);
478
479 pkt->size = ptr - pkt->data;
480 pkt->flags |= AV_PKT_FLAG_KEY;
481 *got_packet = 1;
482
483 fail:
484 av_free(strip_sizes);
485 av_free(strip_offsets);
486 av_free(yuv_line);
487 return ret;
488 }
489
490 static av_cold int encode_init(AVCodecContext *avctx)
491 {
492 avctx->coded_frame = av_frame_alloc();
493 if (!avctx->coded_frame)
494 return AVERROR(ENOMEM);
495
496 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
497 avctx->coded_frame->key_frame = 1;
498
499 return 0;
500 }
501
502 static av_cold int encode_close(AVCodecContext *avctx)
503 {
504 av_frame_free(&avctx->coded_frame);
505 return 0;
506 }
507
508 #define OFFSET(x) offsetof(TiffEncoderContext, x)
509 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
510 static const AVOption options[] = {
511 { "compression_algo", NULL, OFFSET(compr), AV_OPT_TYPE_INT, { .i64 = TIFF_PACKBITS }, TIFF_RAW, TIFF_DEFLATE, VE, "compression_algo" },
512 { "packbits", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_PACKBITS }, 0, 0, VE, "compression_algo" },
513 { "raw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_RAW }, 0, 0, VE, "compression_algo" },
514 { "lzw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_LZW }, 0, 0, VE, "compression_algo" },
515 #if CONFIG_ZLIB
516 { "deflate", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_DEFLATE }, 0, 0, VE, "compression_algo" },
517 #endif
518 { NULL },
519 };
520
521 static const AVClass tiffenc_class = {
522 .class_name = "TIFF encoder",
523 .item_name = av_default_item_name,
524 .option = options,
525 .version = LIBAVUTIL_VERSION_INT,
526 };
527
528 AVCodec ff_tiff_encoder = {
529 .name = "tiff",
530 .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
531 .type = AVMEDIA_TYPE_VIDEO,
532 .id = AV_CODEC_ID_TIFF,
533 .priv_data_size = sizeof(TiffEncoderContext),
534 .init = encode_init,
535 .close = encode_close,
536 .encode2 = encode_frame,
537 .pix_fmts = (const enum AVPixelFormat[]) {
538 AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48LE, AV_PIX_FMT_PAL8,
539 AV_PIX_FMT_RGBA, AV_PIX_FMT_RGBA64LE,
540 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16LE,
541 AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_MONOWHITE,
542 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
543 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
544 AV_PIX_FMT_NONE
545 },
546 .priv_class = &tiffenc_class,
547 };