Statistics
| Branch: | Revision:

ffmpeg / libavcodec / tiffenc.c @ 63613fe6

History | View | Annotate | Download (14.5 KB)

1 716222db Michael Niedermayer
/*
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 ee5c8a9b Diego Biurrun
/**
23
 * TIFF image encoder
24 bad5537e Diego Biurrun
 * @file libavcodec/tiffenc.c
25 ee5c8a9b Diego Biurrun
 * @author Bartlomiej Wolowiec
26
 */
27 716222db Michael Niedermayer
#include "avcodec.h"
28 b250f9c6 Aurelien Jacobs
#if CONFIG_ZLIB
29 716222db Michael Niedermayer
#include <zlib.h>
30
#endif
31
#include "bytestream.h"
32
#include "tiff.h"
33
#include "rle.h"
34 efd2afc2 Michael Niedermayer
#include "lzw.h"
35 716222db Michael Niedermayer
36
#define TIFF_MAX_ENTRY 32
37
38
/** sizes of various TIFF field types (string size = 1)*/
39
static const uint8_t type_sizes2[6] = {
40
    0, 1, 1, 2, 4, 8
41
};
42
43
typedef struct TiffEncoderContext {
44
    AVCodecContext *avctx;
45
    AVFrame picture;
46
47
    int width;                          ///< picture width
48
    int height;                         ///< picture height
49
    unsigned int bpp;                   ///< bits per pixel
50
    int compr;                          ///< compression level
51
    int bpp_tab_size;                   ///< bpp_tab size
52 e780e99e Kamil Nowosad
    int photometric_interpretation;     ///< photometric interpretation
53 716222db Michael Niedermayer
    int strips;                         ///< number of strips
54
    int rps;                            ///< row per strip
55
    uint8_t entries[TIFF_MAX_ENTRY*12]; ///< entires in header
56
    int num_entries;                    ///< number of entires
57
    uint8_t **buf;                      ///< actual position in buffer
58
    uint8_t *buf_start;                 ///< pointer to first byte in buffer
59
    int buf_size;                       ///< buffer size
60 f4d47d6b Kamil Nowosad
    uint16_t subsampling[2];            ///< YUV subsampling factors
61 efd2afc2 Michael Niedermayer
    struct LZWEncodeState *lzws;        ///< LZW Encode state
62 716222db Michael Niedermayer
} TiffEncoderContext;
63
64
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
inline static 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
/**
82
 * Put n values to buffer
83
 *
84
 * @param p Pointer to pointer to output buffer
85
 * @param n Number of values
86
 * @param val Pointer to values
87
 * @param type Type of values
88
 * @param flip =0 - normal copy, >0 - flip
89
 */
90
static void tnput(uint8_t ** p, int n, const uint8_t * val, enum TiffTypes type,
91
                  int flip)
92
{
93
    int i;
94 63613fe6 Måns Rullgård
#if HAVE_BIGENDIAN
95 716222db Michael Niedermayer
    flip ^= ((int[]) {0, 0, 0, 1, 3, 3})[type];
96
#endif
97
    for (i = 0; i < n * type_sizes2[type]; i++)
98
        *(*p)++ = val[i ^ flip];
99
}
100
101
/**
102
 * Add entry to directory in tiff header.
103
 * @param s Tiff context
104
 * @param tag Tag that identifies the entry
105
 * @param type Entry type
106
 * @param count The number of values
107
 * @param ptr_val Pointer to values
108
 */
109
static void add_entry(TiffEncoderContext * s,
110
                      enum TiffTags tag, enum TiffTypes type, int count,
111
                      const void *ptr_val)
112
{
113
    uint8_t *entries_ptr = s->entries + 12 * s->num_entries;
114
115
    assert(s->num_entries < TIFF_MAX_ENTRY);
116
117
    bytestream_put_le16(&entries_ptr, tag);
118
    bytestream_put_le16(&entries_ptr, type);
119
    bytestream_put_le32(&entries_ptr, count);
120
121
    if (type_sizes[type] * count <= 4) {
122
        tnput(&entries_ptr, count, ptr_val, type, 0);
123
    } else {
124
        bytestream_put_le32(&entries_ptr, *s->buf - s->buf_start);
125
        check_size(s, count * type_sizes2[type]);
126
        tnput(s->buf, count, ptr_val, type, 0);
127
    }
128
129
    s->num_entries++;
130
}
131
132 0a7a33d2 Michael Niedermayer
static void add_entry1(TiffEncoderContext * s,
133
                       enum TiffTags tag, enum TiffTypes type, int val){
134
    uint16_t w = val;
135
    uint32_t dw= val;
136 6be4042c Reimar Döffinger
    add_entry(s, tag, type, 1, type == TIFF_SHORT ? (void *)&w : (void *)&dw);
137 0a7a33d2 Michael Niedermayer
}
138
139 716222db Michael Niedermayer
/**
140
 * Encode one strip in tiff file
141
 *
142
 * @param s Tiff context
143
 * @param src Input buffer
144
 * @param dst Output buffer
145
 * @param n Size of input buffer
146
 * @param compr Compression method
147
 * @return Number of output bytes. If an output error is encountered, -1 returned
148
 */
149
static int encode_strip(TiffEncoderContext * s, const int8_t * src,
150
                        uint8_t * dst, int n, int compr)
151
{
152
153
    switch (compr) {
154 b250f9c6 Aurelien Jacobs
#if CONFIG_ZLIB
155 716222db Michael Niedermayer
    case TIFF_DEFLATE:
156
    case TIFF_ADOBE_DEFLATE:
157
        {
158
            unsigned long zlen = s->buf_size - (*s->buf - s->buf_start);
159
            if (compress(dst, &zlen, src, n) != Z_OK) {
160
                av_log(s->avctx, AV_LOG_ERROR, "Compressing failed\n");
161
                return -1;
162
            }
163
            return zlen;
164
        }
165
#endif
166
    case TIFF_RAW:
167
        if (check_size(s, n))
168
            return -1;
169
        memcpy(dst, src, n);
170
        return n;
171
    case TIFF_PACKBITS:
172
        return ff_rle_encode(dst, s->buf_size - (*s->buf - s->buf_start), src, 1, n, 2, 0xff, -1, 0);
173 efd2afc2 Michael Niedermayer
    case TIFF_LZW:
174
        return ff_lzw_encode(s->lzws, src, n);
175 716222db Michael Niedermayer
    default:
176
        return -1;
177
    }
178
}
179
180 f4d47d6b Kamil Nowosad
static void pack_yuv(TiffEncoderContext * s, uint8_t * dst, int lnum)
181
{
182
    AVFrame *p = &s->picture;
183
    int i, j, k;
184
    int w = (s->width - 1) / s->subsampling[0] + 1;
185
    uint8_t *pu = &p->data[1][lnum / s->subsampling[1] * p->linesize[1]];
186
    uint8_t *pv = &p->data[2][lnum / s->subsampling[1] * p->linesize[2]];
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 716222db Michael Niedermayer
static int encode_frame(AVCodecContext * avctx, unsigned char *buf,
198
                        int buf_size, void *data)
199
{
200
    TiffEncoderContext *s = avctx->priv_data;
201
    AVFrame *pict = data;
202
    AVFrame *const p = (AVFrame *) & s->picture;
203
    int i;
204
    int n;
205
    uint8_t *ptr = buf;
206
    uint8_t *offset;
207
    uint32_t strips;
208
    uint32_t *strip_sizes = NULL;
209
    uint32_t *strip_offsets = NULL;
210
    int bytes_per_row;
211
    uint32_t res[2] = { 72, 1 };        // image resolution (72/1)
212
    static const uint16_t bpp_tab[] = { 8, 8, 8, 8 };
213
    int ret = -1;
214 f4d47d6b Kamil Nowosad
    int is_yuv = 0;
215
    uint8_t *yuv_line = NULL;
216
    int shift_h, shift_v;
217 716222db Michael Niedermayer
218
    s->buf_start = buf;
219
    s->buf = &ptr;
220
    s->buf_size = buf_size;
221
222
    *p = *pict;
223
    p->pict_type = FF_I_TYPE;
224
    p->key_frame = 1;
225 e2d09b65 Michael Niedermayer
    avctx->coded_frame= &s->picture;
226 716222db Michael Niedermayer
227
    s->compr = TIFF_PACKBITS;
228
    if (avctx->compression_level == 0) {
229
        s->compr = TIFF_RAW;
230 efd2afc2 Michael Niedermayer
    } else if(avctx->compression_level == 2) {
231
        s->compr = TIFF_LZW;
232 b250f9c6 Aurelien Jacobs
#if CONFIG_ZLIB
233 efd2afc2 Michael Niedermayer
    } else if ((avctx->compression_level >= 3)) {
234 716222db Michael Niedermayer
        s->compr = TIFF_DEFLATE;
235
#endif
236
    }
237
238
    s->width = avctx->width;
239
    s->height = avctx->height;
240 f4d47d6b Kamil Nowosad
    s->subsampling[0] = 1;
241
    s->subsampling[1] = 1;
242 716222db Michael Niedermayer
243
    switch (avctx->pix_fmt) {
244
    case PIX_FMT_RGB24:
245
        s->bpp = 24;
246 e780e99e Kamil Nowosad
        s->photometric_interpretation = 2;
247 716222db Michael Niedermayer
        break;
248
    case PIX_FMT_GRAY8:
249
        s->bpp = 8;
250 e780e99e Kamil Nowosad
        s->photometric_interpretation = 1;
251 716222db Michael Niedermayer
        break;
252
    case PIX_FMT_PAL8:
253
        s->bpp = 8;
254 e780e99e Kamil Nowosad
        s->photometric_interpretation = 3;
255 716222db Michael Niedermayer
        break;
256
    case PIX_FMT_MONOBLACK:
257
        s->bpp = 1;
258 e780e99e Kamil Nowosad
        s->photometric_interpretation = 1;
259 716222db Michael Niedermayer
        break;
260
    case PIX_FMT_MONOWHITE:
261
        s->bpp = 1;
262 e780e99e Kamil Nowosad
        s->photometric_interpretation = 0;
263 716222db Michael Niedermayer
        break;
264 f4d47d6b Kamil Nowosad
    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,
271
                &shift_h, &shift_v);
272
        s->bpp = 8 + (16 >> (shift_h + shift_v));
273
        s->subsampling[0] = 1 << shift_h;
274
        s->subsampling[1] = 1 << shift_v;
275
        s->bpp_tab_size = 3;
276
        is_yuv = 1;
277
        break;
278 716222db Michael Niedermayer
    default:
279
        av_log(s->avctx, AV_LOG_ERROR,
280
               "This colors format is not supported\n");
281
        return -1;
282
    }
283 f4d47d6b Kamil Nowosad
    if (!is_yuv)
284 3011c6f6 Diego Biurrun
        s->bpp_tab_size = (s->bpp >> 3);
285 716222db Michael Niedermayer
286 efd2afc2 Michael Niedermayer
    if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE || s->compr == TIFF_LZW)
287 716222db Michael Niedermayer
        //best choose for DEFLATE
288
        s->rps = s->height;
289
    else
290
        s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1);     // suggest size of strip
291 f4d47d6b Kamil Nowosad
    s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1]; // round rps up
292 716222db Michael Niedermayer
293
    strips = (s->height - 1) / s->rps + 1;
294
295
    if (check_size(s, 8))
296
        goto fail;
297
298
    // write header
299
    bytestream_put_le16(&ptr, 0x4949);
300
    bytestream_put_le16(&ptr, 42);
301
302
    offset = ptr;
303
    bytestream_put_le32(&ptr, 0);
304
305
    strip_sizes = av_mallocz(sizeof(*strip_sizes) * strips);
306
    strip_offsets = av_mallocz(sizeof(*strip_offsets) * strips);
307
308 f4d47d6b Kamil Nowosad
    bytes_per_row = (((s->width - 1)/s->subsampling[0] + 1) * s->bpp
309
                    * s->subsampling[0] * s->subsampling[1] + 7) >> 3;
310
    if (is_yuv){
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");
314
            goto fail;
315
        }
316
    }
317 716222db Michael Niedermayer
318 b250f9c6 Aurelien Jacobs
#if CONFIG_ZLIB
319 716222db Michael Niedermayer
    if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
320
        uint8_t *zbuf;
321
        int zlen, zn;
322
        int j;
323
324
        zlen = bytes_per_row * s->rps;
325
        zbuf = av_malloc(zlen);
326
        strip_offsets[0] = ptr - buf;
327
        zn = 0;
328
        for (j = 0; j < s->rps; j++) {
329 f4d47d6b Kamil Nowosad
            if (is_yuv){
330
                pack_yuv(s, yuv_line, j);
331
                memcpy(zbuf + zn, yuv_line, bytes_per_row);
332
                j += s->subsampling[1] - 1;
333
            }
334
            else
335 24ba15b1 Diego Biurrun
                memcpy(zbuf + j * bytes_per_row,
336
                       p->data[0] + j * p->linesize[0], bytes_per_row);
337 716222db Michael Niedermayer
            zn += bytes_per_row;
338
        }
339
        n = encode_strip(s, zbuf, ptr, zn, s->compr);
340
        av_free(zbuf);
341
        if (n<0) {
342
            av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
343
            goto fail;
344
        }
345
        ptr += n;
346
        strip_sizes[0] = ptr - buf - strip_offsets[0];
347
    } else
348
#endif
349
    {
350 efd2afc2 Michael Niedermayer
        if(s->compr == TIFF_LZW)
351
            s->lzws = av_malloc(ff_lzw_encode_state_size);
352 716222db Michael Niedermayer
        for (i = 0; i < s->height; i++) {
353
            if (strip_sizes[i / s->rps] == 0) {
354 efd2afc2 Michael Niedermayer
                if(s->compr == TIFF_LZW){
355
                    ff_lzw_encode_init(s->lzws, ptr, s->buf_size - (*s->buf - s->buf_start), 12);
356
                }
357 716222db Michael Niedermayer
                strip_offsets[i / s->rps] = ptr - buf;
358
            }
359 f4d47d6b Kamil Nowosad
            if (is_yuv){
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;
363
            }
364
            else
365
                n = encode_strip(s, p->data[0] + i * p->linesize[0],
366
                        ptr, bytes_per_row, s->compr);
367
            if (n < 0) {
368 716222db Michael Niedermayer
                av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
369
                goto fail;
370
            }
371
            strip_sizes[i / s->rps] += n;
372
            ptr += n;
373 efd2afc2 Michael Niedermayer
            if(s->compr == TIFF_LZW && (i==s->height-1 || i%s->rps == s->rps-1)){
374
                int ret;
375
                ret = ff_lzw_encode_flush(s->lzws);
376
                strip_sizes[(i / s->rps )] += ret ;
377
                ptr += ret;
378
            }
379 716222db Michael Niedermayer
        }
380 efd2afc2 Michael Niedermayer
        if(s->compr == TIFF_LZW)
381
            av_free(s->lzws);
382 716222db Michael Niedermayer
    }
383
384
    s->num_entries = 0;
385
386 0a7a33d2 Michael Niedermayer
    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 716222db Michael Niedermayer
390
    if (s->bpp_tab_size)
391
    add_entry(s, TIFF_BPP,               TIFF_SHORT,    s->bpp_tab_size, bpp_tab);
392
393 0a7a33d2 Michael Niedermayer
    add_entry1(s,TIFF_COMPR,             TIFF_SHORT,            s->compr);
394 e780e99e Kamil Nowosad
    add_entry1(s,TIFF_INVERT,            TIFF_SHORT,            s->photometric_interpretation);
395 716222db Michael Niedermayer
    add_entry(s, TIFF_STRIP_OFFS,        TIFF_LONG,     strips, strip_offsets);
396
397
    if (s->bpp_tab_size)
398 0a7a33d2 Michael Niedermayer
    add_entry1(s,TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT,            s->bpp_tab_size);
399 716222db Michael Niedermayer
400 0a7a33d2 Michael Niedermayer
    add_entry1(s,TIFF_ROWSPERSTRIP,      TIFF_LONG,             s->rps);
401 716222db Michael Niedermayer
    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 0a7a33d2 Michael Niedermayer
    add_entry1(s,TIFF_RES_UNIT,          TIFF_SHORT,            2);
405 c28baf06 Michael Niedermayer
406
    if(!(avctx->flags & CODEC_FLAG_BITEXACT))
407 716222db Michael Niedermayer
    add_entry(s, TIFF_SOFTWARE_NAME,     TIFF_STRING,
408
              strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT);
409
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;
417
        }
418
        add_entry(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal);
419
    }
420 f4d47d6b Kamil Nowosad
    if (is_yuv){
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);
425
    }
426 716222db Michael Niedermayer
    bytestream_put_le32(&offset, ptr - buf);    // write offset to dir
427
428
    if (check_size(s, 6 + s->num_entries * 12))
429
        goto fail;
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);
433
434
    ret = ptr - buf;
435
436
fail:
437
    av_free(strip_sizes);
438
    av_free(strip_offsets);
439 f4d47d6b Kamil Nowosad
    av_free(yuv_line);
440 716222db Michael Niedermayer
    return ret;
441
}
442
443
AVCodec tiff_encoder = {
444
    "tiff",
445
    CODEC_TYPE_VIDEO,
446
    CODEC_ID_TIFF,
447
    sizeof(TiffEncoderContext),
448
    NULL,
449
    encode_frame,
450
    NULL,
451
    NULL,
452
    0,
453
    NULL,
454
    .pix_fmts =
455
        (enum PixelFormat[]) {PIX_FMT_RGB24, PIX_FMT_PAL8, PIX_FMT_GRAY8,
456
                              PIX_FMT_MONOBLACK, PIX_FMT_MONOWHITE,
457 f4d47d6b Kamil Nowosad
                              PIX_FMT_YUV420P, PIX_FMT_YUV422P,
458
                              PIX_FMT_YUV444P, PIX_FMT_YUV410P,
459 0e5d511a Stefano Sabatini
                              PIX_FMT_YUV411P,
460 eacced45 Carl Eugen Hoyos
                              PIX_FMT_NONE},
461 fe4bf374 Stefano Sabatini
    .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
462 716222db Michael Niedermayer
};