3 * Copyright (c) 2007 Bartlomiej Wolowiec
5 * This file is part of FFmpeg.
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.
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.
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
26 * @author Bartlomiej Wolowiec
32 #include "bytestream.h"
37 #define TIFF_MAX_ENTRY 32
39 /** sizes of various TIFF field types (string size = 1)*/
40 static const uint8_t type_sizes2[6] = {
44 typedef struct TiffEncoderContext {
45 AVCodecContext *avctx;
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
67 * Check free space in buffer
68 * @param s Tiff context
69 * @param need Needed bytes
70 * @return 0 - ok, 1 - no free space
72 inline static int check_size(TiffEncoderContext * s, uint64_t need)
74 if (s->buf_size < *s->buf - s->buf_start + need) {
75 *s->buf = s->buf_start + s->buf_size + 1;
76 av_log(s->avctx, AV_LOG_ERROR, "Buffer is too small\n");
83 * Put n values to buffer
85 * @param p Pointer to pointer to output buffer
86 * @param n Number of values
87 * @param val Pointer to values
88 * @param type Type of values
89 * @param flip =0 - normal copy, >0 - flip
91 static void tnput(uint8_t ** p, int n, const uint8_t * val, enum TiffTypes type,
95 #ifdef WORDS_BIGENDIAN
96 flip ^= ((int[]) {0, 0, 0, 1, 3, 3})[type];
98 for (i = 0; i < n * type_sizes2[type]; i++)
99 *(*p)++ = val[i ^ flip];
103 * Add entry to directory in tiff header.
104 * @param s Tiff context
105 * @param tag Tag that identifies the entry
106 * @param type Entry type
107 * @param count The number of values
108 * @param ptr_val Pointer to values
110 static void add_entry(TiffEncoderContext * s,
111 enum TiffTags tag, enum TiffTypes type, int count,
114 uint8_t *entries_ptr = s->entries + 12 * s->num_entries;
116 assert(s->num_entries < TIFF_MAX_ENTRY);
118 bytestream_put_le16(&entries_ptr, tag);
119 bytestream_put_le16(&entries_ptr, type);
120 bytestream_put_le32(&entries_ptr, count);
122 if (type_sizes[type] * count <= 4) {
123 tnput(&entries_ptr, count, ptr_val, type, 0);
125 bytestream_put_le32(&entries_ptr, *s->buf - s->buf_start);
126 check_size(s, count * type_sizes2[type]);
127 tnput(s->buf, count, ptr_val, type, 0);
133 static void add_entry1(TiffEncoderContext * s,
134 enum TiffTags tag, enum TiffTypes type, int val){
137 add_entry(s, tag, type, 1, type == TIFF_SHORT ? &w : &dw);
141 * Encode one strip in tiff file
143 * @param s Tiff context
144 * @param src Input buffer
145 * @param dst Output buffer
146 * @param n Size of input buffer
147 * @param compr Compression method
148 * @return Number of output bytes. If an output error is encountered, -1 returned
150 static int encode_strip(TiffEncoderContext * s, const int8_t * src,
151 uint8_t * dst, int n, int compr)
157 case TIFF_ADOBE_DEFLATE:
159 unsigned long zlen = s->buf_size - (*s->buf - s->buf_start);
160 if (compress(dst, &zlen, src, n) != Z_OK) {
161 av_log(s->avctx, AV_LOG_ERROR, "Compressing failed\n");
168 if (check_size(s, n))
173 return ff_rle_encode(dst, s->buf_size - (*s->buf - s->buf_start), src, 1, n, 2, 0xff, -1, 0);
175 return ff_lzw_encode(s->lzws, src, n);
181 static void pack_yuv(TiffEncoderContext * s, uint8_t * dst, int lnum)
183 AVFrame *p = &s->picture;
185 int w = (s->width - 1) / s->subsampling[0] + 1;
186 uint8_t *pu = &p->data[1][lnum / s->subsampling[1] * p->linesize[1]];
187 uint8_t *pv = &p->data[2][lnum / s->subsampling[1] * p->linesize[2]];
188 for (i = 0; i < w; i++){
189 for (j = 0; j < s->subsampling[1]; j++)
190 for (k = 0; k < s->subsampling[0]; k++)
191 *dst++ = p->data[0][(lnum + j) * p->linesize[0] +
192 i * s->subsampling[0] + k];
198 static int encode_frame(AVCodecContext * avctx, unsigned char *buf,
199 int buf_size, void *data)
201 TiffEncoderContext *s = avctx->priv_data;
202 AVFrame *pict = data;
203 AVFrame *const p = (AVFrame *) & s->picture;
209 uint32_t *strip_sizes = NULL;
210 uint32_t *strip_offsets = NULL;
212 uint32_t res[2] = { 72, 1 }; // image resolution (72/1)
213 static const uint16_t bpp_tab[] = { 8, 8, 8, 8 };
216 uint8_t *yuv_line = NULL;
217 int shift_h, shift_v;
221 s->buf_size = buf_size;
224 p->pict_type = FF_I_TYPE;
227 s->compr = TIFF_PACKBITS;
228 if (avctx->compression_level == 0) {
230 } else if(avctx->compression_level == 2) {
233 } else if ((avctx->compression_level >= 3)) {
234 s->compr = TIFF_DEFLATE;
238 s->width = avctx->width;
239 s->height = avctx->height;
240 s->subsampling[0] = 1;
241 s->subsampling[1] = 1;
243 switch (avctx->pix_fmt) {
246 s->photometric_interpretation = 2;
250 s->photometric_interpretation = 1;
254 s->photometric_interpretation = 3;
256 case PIX_FMT_MONOBLACK:
258 s->photometric_interpretation = 1;
260 case PIX_FMT_MONOWHITE:
262 s->photometric_interpretation = 0;
264 case PIX_FMT_YUV420P:
265 case PIX_FMT_YUV422P:
266 case PIX_FMT_YUV444P:
267 case PIX_FMT_YUV410P:
268 case PIX_FMT_YUV411P:
269 s->photometric_interpretation = 6;
270 avcodec_get_chroma_sub_sample(avctx->pix_fmt,
272 s->bpp = 8 + (16 >> (shift_h + shift_v));
273 s->subsampling[0] = 1 << shift_h;
274 s->subsampling[1] = 1 << shift_v;
279 av_log(s->avctx, AV_LOG_ERROR,
280 "This colors format is not supported\n");
284 s->bpp_tab_size = (s->bpp >> 3);
286 if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE || s->compr == TIFF_LZW)
287 //best choose for DEFLATE
290 s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1); // suggest size of strip
291 s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1]; // round rps up
293 strips = (s->height - 1) / s->rps + 1;
295 if (check_size(s, 8))
299 bytestream_put_le16(&ptr, 0x4949);
300 bytestream_put_le16(&ptr, 42);
303 bytestream_put_le32(&ptr, 0);
305 strip_sizes = av_mallocz(sizeof(*strip_sizes) * strips);
306 strip_offsets = av_mallocz(sizeof(*strip_offsets) * strips);
308 bytes_per_row = (((s->width - 1)/s->subsampling[0] + 1) * s->bpp
309 * s->subsampling[0] * s->subsampling[1] + 7) >> 3;
311 yuv_line = av_malloc(bytes_per_row);
312 if (yuv_line == NULL){
313 av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");
319 if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
324 zlen = bytes_per_row * s->rps;
325 zbuf = av_malloc(zlen);
326 strip_offsets[0] = ptr - buf;
328 for (j = 0; j < s->rps; j++) {
330 pack_yuv(s, yuv_line, j);
331 memcpy(zbuf + zn, yuv_line, bytes_per_row);
332 j += s->subsampling[1] - 1;
335 memcpy(zbuf + j * bytes_per_row,
336 p->data[0] + j * p->linesize[0], bytes_per_row);
339 n = encode_strip(s, zbuf, ptr, zn, s->compr);
342 av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
346 strip_sizes[0] = ptr - buf - strip_offsets[0];
350 if(s->compr == TIFF_LZW)
351 s->lzws = av_malloc(ff_lzw_encode_state_size);
352 for (i = 0; i < s->height; i++) {
353 if (strip_sizes[i / s->rps] == 0) {
354 if(s->compr == TIFF_LZW){
355 ff_lzw_encode_init(s->lzws, ptr, s->buf_size - (*s->buf - s->buf_start), 12);
357 strip_offsets[i / s->rps] = ptr - buf;
360 pack_yuv(s, yuv_line, i);
361 n = encode_strip(s, yuv_line, ptr, bytes_per_row, s->compr);
362 i += s->subsampling[1] - 1;
365 n = encode_strip(s, p->data[0] + i * p->linesize[0],
366 ptr, bytes_per_row, s->compr);
368 av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
371 strip_sizes[i / s->rps] += n;
373 if(s->compr == TIFF_LZW && (i==s->height-1 || i%s->rps == s->rps-1)){
375 ret = ff_lzw_encode_flush(s->lzws);
376 strip_sizes[(i / s->rps )] += ret ;
380 if(s->compr == TIFF_LZW)
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);
391 add_entry(s, TIFF_BPP, TIFF_SHORT, s->bpp_tab_size, bpp_tab);
393 add_entry1(s,TIFF_COMPR, TIFF_SHORT, s->compr);
394 add_entry1(s,TIFF_INVERT, TIFF_SHORT, s->photometric_interpretation);
395 add_entry(s, TIFF_STRIP_OFFS, TIFF_LONG, strips, strip_offsets);
398 add_entry1(s,TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT, s->bpp_tab_size);
400 add_entry1(s,TIFF_ROWSPERSTRIP, TIFF_LONG, s->rps);
401 add_entry(s, TIFF_STRIP_SIZE, TIFF_LONG, strips, strip_sizes);
402 add_entry(s, TIFF_XRES, TIFF_RATIONAL, 1, res);
403 add_entry(s, TIFF_YRES, TIFF_RATIONAL, 1, res);
404 add_entry1(s,TIFF_RES_UNIT, TIFF_SHORT, 2);
406 if(!(avctx->flags & CODEC_FLAG_BITEXACT))
407 add_entry(s, TIFF_SOFTWARE_NAME, TIFF_STRING,
408 strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT);
410 if (avctx->pix_fmt == PIX_FMT_PAL8) {
411 uint16_t pal[256 * 3];
412 for (i = 0; i < 256; i++) {
413 uint32_t rgb = *(uint32_t *) (p->data[1] + i * 4);
414 pal[i] = ((rgb >> 16) & 0xff) * 257;
415 pal[i + 256] = ((rgb >> 8 ) & 0xff) * 257;
416 pal[i + 512] = ( rgb & 0xff) * 257;
418 add_entry(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal);
421 /** according to CCIR Recommendation 601.1 */
422 uint32_t refbw[12] = {15, 1, 235, 1, 128, 1, 240, 1, 128, 1, 240, 1};
423 add_entry(s, TIFF_YCBCR_SUBSAMPLING, TIFF_SHORT, 2, s->subsampling);
424 add_entry(s, TIFF_REFERENCE_BW, TIFF_RATIONAL, 6, refbw);
426 bytestream_put_le32(&offset, ptr - buf); // write offset to dir
428 if (check_size(s, 6 + s->num_entries * 12))
430 bytestream_put_le16(&ptr, s->num_entries); // write tag count
431 bytestream_put_buffer(&ptr, s->entries, s->num_entries * 12);
432 bytestream_put_le32(&ptr, 0);
437 av_free(strip_sizes);
438 av_free(strip_offsets);
443 AVCodec tiff_encoder = {
447 sizeof(TiffEncoderContext),
455 (enum PixelFormat[]) {PIX_FMT_RGB24, PIX_FMT_PAL8, PIX_FMT_GRAY8,
456 PIX_FMT_MONOBLACK, PIX_FMT_MONOWHITE,
457 PIX_FMT_YUV420P, PIX_FMT_YUV422P,
458 PIX_FMT_YUV444P, PIX_FMT_YUV410P,