3 * Copyright (c) 2007 Bartlomiej Wolowiec
5 * This file is part of Libav.
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.
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.
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
25 * @author Bartlomiej Wolowiec
33 #include "libavutil/log.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/pixdesc.h"
37 #include "bytestream.h"
43 #define TIFF_MAX_ENTRY 32
45 /** sizes of various TIFF field types (string size = 1)*/
46 static const uint8_t type_sizes2[6] = {
50 typedef struct TiffEncoderContext {
51 AVClass *class; ///< for private options
52 AVCodecContext *avctx;
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 int 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
72 * Check free space in buffer
73 * @param s Tiff context
74 * @param need Needed bytes
75 * @return 0 - ok, 1 - no free space
77 static inline int check_size(TiffEncoderContext *s, uint64_t need)
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");
88 * Put n values to buffer
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
96 static void tnput(uint8_t **p, int n, const uint8_t *val, enum TiffTypes type,
101 flip ^= ((int[]) { 0, 0, 0, 1, 3, 3 })[type];
103 for (i = 0; i < n * type_sizes2[type]; i++)
104 *(*p)++ = val[i ^ flip];
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
115 static void add_entry(TiffEncoderContext *s, enum TiffTags tag,
116 enum TiffTypes type, int count, const void *ptr_val)
118 uint8_t *entries_ptr = s->entries + 12 * s->num_entries;
120 assert(s->num_entries < TIFF_MAX_ENTRY);
122 bytestream_put_le16(&entries_ptr, tag);
123 bytestream_put_le16(&entries_ptr, type);
124 bytestream_put_le32(&entries_ptr, count);
126 if (type_sizes[type] * count <= 4) {
127 tnput(&entries_ptr, count, ptr_val, type, 0);
129 bytestream_put_le32(&entries_ptr, *s->buf - s->buf_start);
130 check_size(s, count * type_sizes2[type]);
131 tnput(s->buf, count, ptr_val, type, 0);
137 static void add_entry1(TiffEncoderContext *s,
138 enum TiffTags tag, enum TiffTypes type, int val)
142 add_entry(s, tag, type, 1, type == TIFF_SHORT ? (void *)&w : (void *)&dw);
146 * Encode one strip in tiff file
148 * @param s Tiff context
149 * @param src Input buffer
150 * @param dst Output buffer
151 * @param n Size of input buffer
152 * @param compr Compression method
153 * @return Number of output bytes. If an output error is encountered, -1 returned
155 static int encode_strip(TiffEncoderContext *s, const int8_t *src,
156 uint8_t *dst, int n, int compr)
161 case TIFF_ADOBE_DEFLATE:
163 unsigned long zlen = s->buf_size - (*s->buf - s->buf_start);
164 if (compress(dst, &zlen, src, n) != Z_OK) {
165 av_log(s->avctx, AV_LOG_ERROR, "Compressing failed\n");
172 if (check_size(s, n))
177 return ff_rle_encode(dst, s->buf_size - (*s->buf - s->buf_start),
178 src, 1, n, 2, 0xff, -1, 0);
180 return ff_lzw_encode(s->lzws, src, n);
186 static void pack_yuv(TiffEncoderContext *s, const AVFrame *p,
187 uint8_t *dst, int lnum)
190 int w = (s->width - 1) / s->subsampling[0] + 1;
191 uint8_t *pu = &p->data[1][lnum / s->subsampling[1] * p->linesize[1]];
192 uint8_t *pv = &p->data[2][lnum / s->subsampling[1] * p->linesize[2]];
193 for (i = 0; i < w; i++) {
194 for (j = 0; j < s->subsampling[1]; j++)
195 for (k = 0; k < s->subsampling[0]; k++)
196 *dst++ = p->data[0][(lnum + j) * p->linesize[0] +
197 i * s->subsampling[0] + k];
203 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
204 const AVFrame *pict, int *got_packet)
206 TiffEncoderContext *s = avctx->priv_data;
207 const AVFrame *const p = pict;
212 uint32_t *strip_sizes = NULL;
213 uint32_t *strip_offsets = NULL;
215 uint32_t res[2] = { 72, 1 }; // image resolution (72/1)
216 uint16_t bpp_tab[] = { 8, 8, 8, 8 };
219 uint8_t *yuv_line = NULL;
220 int shift_h, shift_v;
221 const AVPixFmtDescriptor *pfd;
225 s->width = avctx->width;
226 s->height = avctx->height;
227 s->subsampling[0] = 1;
228 s->subsampling[1] = 1;
230 switch (avctx->pix_fmt) {
231 case AV_PIX_FMT_RGB48LE:
232 case AV_PIX_FMT_GRAY16LE:
233 case AV_PIX_FMT_RGB24:
234 case AV_PIX_FMT_GRAY8:
235 case AV_PIX_FMT_PAL8:
236 pfd = av_pix_fmt_desc_get(avctx->pix_fmt);
237 s->bpp = av_get_bits_per_pixel(pfd);
238 if (pfd->flags & AV_PIX_FMT_FLAG_PAL)
239 s->photometric_interpretation = 3;
240 else if (pfd->flags & AV_PIX_FMT_FLAG_RGB)
241 s->photometric_interpretation = 2;
243 s->photometric_interpretation = 1;
244 s->bpp_tab_size = pfd->nb_components;
245 for (i = 0; i < s->bpp_tab_size; i++)
246 bpp_tab[i] = s->bpp / s->bpp_tab_size;
248 case AV_PIX_FMT_MONOBLACK:
250 s->photometric_interpretation = 1;
253 case AV_PIX_FMT_MONOWHITE:
255 s->photometric_interpretation = 0;
258 case AV_PIX_FMT_YUV420P:
259 case AV_PIX_FMT_YUV422P:
260 case AV_PIX_FMT_YUV444P:
261 case AV_PIX_FMT_YUV410P:
262 case AV_PIX_FMT_YUV411P:
263 av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &shift_h, &shift_v);
264 s->photometric_interpretation = 6;
265 s->bpp = 8 + (16 >> (shift_h + shift_v));
266 s->subsampling[0] = 1 << shift_h;
267 s->subsampling[1] = 1 << shift_v;
272 av_log(s->avctx, AV_LOG_ERROR,
273 "This colors format is not supported\n");
277 if (s->compr == TIFF_DEFLATE ||
278 s->compr == TIFF_ADOBE_DEFLATE ||
279 s->compr == TIFF_LZW)
280 // best choice for DEFLATE
283 // suggest size of strip
284 s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1);
286 s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1];
288 strips = (s->height - 1) / s->rps + 1;
291 (ret = av_new_packet(pkt,
292 avctx->width * avctx->height * s->bpp * 2 +
293 avctx->height * 4 + FF_MIN_BUFFER_SIZE)) < 0) {
294 av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
298 s->buf_start = pkt->data;
300 s->buf_size = pkt->size;
302 if (check_size(s, 8))
306 bytestream_put_le16(&ptr, 0x4949);
307 bytestream_put_le16(&ptr, 42);
310 bytestream_put_le32(&ptr, 0);
312 strip_sizes = av_mallocz(sizeof(*strip_sizes) * strips);
313 strip_offsets = av_mallocz(sizeof(*strip_offsets) * strips);
314 if (!strip_sizes || !strip_offsets) {
315 ret = AVERROR(ENOMEM);
319 bytes_per_row = (((s->width - 1) / s->subsampling[0] + 1) * s->bpp *
320 s->subsampling[0] * s->subsampling[1] + 7) >> 3;
322 yuv_line = av_malloc(bytes_per_row);
323 if (yuv_line == NULL) {
324 av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");
325 ret = AVERROR(ENOMEM);
331 if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
336 zlen = bytes_per_row * s->rps;
337 zbuf = av_malloc(zlen);
339 ret = AVERROR(ENOMEM);
342 strip_offsets[0] = ptr - pkt->data;
344 for (j = 0; j < s->rps; j++) {
346 pack_yuv(s, p, yuv_line, j);
347 memcpy(zbuf + zn, yuv_line, bytes_per_row);
348 j += s->subsampling[1] - 1;
350 memcpy(zbuf + j * bytes_per_row,
351 p->data[0] + j * p->linesize[0], bytes_per_row);
354 ret = encode_strip(s, zbuf, ptr, zn, s->compr);
357 av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
361 strip_sizes[0] = ptr - pkt->data - strip_offsets[0];
364 if (s->compr == TIFF_LZW) {
365 s->lzws = av_malloc(ff_lzw_encode_state_size);
367 ret = AVERROR(ENOMEM);
371 for (i = 0; i < s->height; i++) {
372 if (strip_sizes[i / s->rps] == 0) {
373 if (s->compr == TIFF_LZW) {
374 ff_lzw_encode_init(s->lzws, ptr,
375 s->buf_size - (*s->buf - s->buf_start),
376 12, FF_LZW_TIFF, put_bits);
378 strip_offsets[i / s->rps] = ptr - pkt->data;
381 pack_yuv(s, p, yuv_line, i);
382 ret = encode_strip(s, yuv_line, ptr, bytes_per_row, s->compr);
383 i += s->subsampling[1] - 1;
385 ret = encode_strip(s, p->data[0] + i * p->linesize[0],
386 ptr, bytes_per_row, s->compr);
388 av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
391 strip_sizes[i / s->rps] += ret;
393 if (s->compr == TIFF_LZW &&
394 (i == s->height - 1 || i % s->rps == s->rps - 1)) {
395 ret = ff_lzw_encode_flush(s->lzws, flush_put_bits);
396 strip_sizes[(i / s->rps)] += ret;
400 if (s->compr == TIFF_LZW)
405 add_entry1(s, TIFF_SUBFILE, TIFF_LONG, 0);
406 add_entry1(s, TIFF_WIDTH, TIFF_LONG, s->width);
407 add_entry1(s, TIFF_HEIGHT, TIFF_LONG, s->height);
410 add_entry(s, TIFF_BPP, TIFF_SHORT, s->bpp_tab_size, bpp_tab);
412 add_entry1(s, TIFF_COMPR, TIFF_SHORT, s->compr);
413 add_entry1(s, TIFF_INVERT, TIFF_SHORT, s->photometric_interpretation);
414 add_entry(s, TIFF_STRIP_OFFS, TIFF_LONG, strips, strip_offsets);
417 add_entry1(s, TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT, s->bpp_tab_size);
419 add_entry1(s, TIFF_ROWSPERSTRIP, TIFF_LONG, s->rps);
420 add_entry(s, TIFF_STRIP_SIZE, TIFF_LONG, strips, strip_sizes);
421 add_entry(s, TIFF_XRES, TIFF_RATIONAL, 1, res);
422 add_entry(s, TIFF_YRES, TIFF_RATIONAL, 1, res);
423 add_entry1(s, TIFF_RES_UNIT, TIFF_SHORT, 2);
425 if (!(avctx->flags & CODEC_FLAG_BITEXACT))
426 add_entry(s, TIFF_SOFTWARE_NAME, TIFF_STRING,
427 strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT);
429 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
430 uint16_t pal[256 * 3];
431 for (i = 0; i < 256; i++) {
432 uint32_t rgb = *(uint32_t *) (p->data[1] + i * 4);
433 pal[i] = ((rgb >> 16) & 0xff) * 257;
434 pal[i + 256] = ((rgb >> 8) & 0xff) * 257;
435 pal[i + 512] = (rgb & 0xff) * 257;
437 add_entry(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal);
440 /** according to CCIR Recommendation 601.1 */
441 uint32_t refbw[12] = { 15, 1, 235, 1, 128, 1, 240, 1, 128, 1, 240, 1 };
442 add_entry(s, TIFF_YCBCR_SUBSAMPLING, TIFF_SHORT, 2, s->subsampling);
443 add_entry(s, TIFF_REFERENCE_BW, TIFF_RATIONAL, 6, refbw);
445 // write offset to dir
446 bytestream_put_le32(&offset, ptr - pkt->data);
448 if (check_size(s, 6 + s->num_entries * 12)) {
449 ret = AVERROR(EINVAL);
452 bytestream_put_le16(&ptr, s->num_entries); // write tag count
453 bytestream_put_buffer(&ptr, s->entries, s->num_entries * 12);
454 bytestream_put_le32(&ptr, 0);
456 pkt->size = ptr - pkt->data;
457 pkt->flags |= AV_PKT_FLAG_KEY;
461 av_free(strip_sizes);
462 av_free(strip_offsets);
467 static av_cold int encode_init(AVCodecContext *avctx)
469 avctx->coded_frame = av_frame_alloc();
470 if (!avctx->coded_frame)
471 return AVERROR(ENOMEM);
473 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
474 avctx->coded_frame->key_frame = 1;
479 static av_cold int encode_close(AVCodecContext *avctx)
481 av_frame_free(&avctx->coded_frame);
485 #define OFFSET(x) offsetof(TiffEncoderContext, x)
486 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
487 static const AVOption options[] = {
488 { "compression_algo", NULL, OFFSET(compr), AV_OPT_TYPE_INT, { .i64 = TIFF_PACKBITS }, TIFF_RAW, TIFF_DEFLATE, VE, "compression_algo" },
489 { "packbits", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_PACKBITS }, 0, 0, VE, "compression_algo" },
490 { "raw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_RAW }, 0, 0, VE, "compression_algo" },
491 { "lzw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_LZW }, 0, 0, VE, "compression_algo" },
493 { "deflate", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_DEFLATE }, 0, 0, VE, "compression_algo" },
498 static const AVClass tiffenc_class = {
499 .class_name = "TIFF encoder",
500 .item_name = av_default_item_name,
502 .version = LIBAVUTIL_VERSION_INT,
505 AVCodec ff_tiff_encoder = {
507 .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
508 .type = AVMEDIA_TYPE_VIDEO,
509 .id = AV_CODEC_ID_TIFF,
510 .priv_data_size = sizeof(TiffEncoderContext),
512 .close = encode_close,
513 .encode2 = encode_frame,
514 .pix_fmts = (const enum AVPixelFormat[]) {
515 AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48LE, AV_PIX_FMT_PAL8,
516 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16LE,
517 AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_MONOWHITE,
518 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
519 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
522 .priv_class = &tiffenc_class,