tiffenc.c
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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 
28 #include "libavutil/log.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/pixdesc.h"
31 
32 #include "avcodec.h"
33 #include "config.h"
34 #if CONFIG_ZLIB
35 #include <zlib.h>
36 #endif
37 #include "bytestream.h"
38 #include "tiff.h"
39 #include "rle.h"
40 #include "lzw.h"
41 #include "put_bits.h"
42 
43 #define TIFF_MAX_ENTRY 32
44 
46 static const uint8_t type_sizes2[6] = {
47  0, 1, 1, 2, 4, 8
48 };
49 
50 typedef struct TiffEncoderContext {
51  AVClass *class;
54 
55  int width;
56  int height;
57  unsigned int bpp;
58  int compr;
61  int strips;
62  int rps;
67  int buf_size;
68  uint16_t subsampling[2];
69  struct LZWEncodeState *lzws;
71 
72 
79 static inline int check_size(TiffEncoderContext * s, uint64_t need)
80 {
81  if (s->buf_size < *s->buf - s->buf_start + need) {
82  *s->buf = s->buf_start + s->buf_size + 1;
83  av_log(s->avctx, AV_LOG_ERROR, "Buffer is too small\n");
84  return 1;
85  }
86  return 0;
87 }
88 
98 static void tnput(uint8_t ** p, int n, const uint8_t * val, enum TiffTypes type,
99  int flip)
100 {
101  int i;
102 #if HAVE_BIGENDIAN
103  flip ^= ((int[]) {0, 0, 0, 1, 3, 3})[type];
104 #endif
105  for (i = 0; i < n * type_sizes2[type]; i++)
106  *(*p)++ = val[i ^ flip];
107 }
108 
118  enum TiffTags tag, enum TiffTypes type, int count,
119  const void *ptr_val)
120 {
121  uint8_t *entries_ptr = s->entries + 12 * s->num_entries;
122 
123  assert(s->num_entries < TIFF_MAX_ENTRY);
124 
125  bytestream_put_le16(&entries_ptr, tag);
126  bytestream_put_le16(&entries_ptr, type);
127  bytestream_put_le32(&entries_ptr, count);
128 
129  if (type_sizes[type] * count <= 4) {
130  tnput(&entries_ptr, count, ptr_val, type, 0);
131  } else {
132  bytestream_put_le32(&entries_ptr, *s->buf - s->buf_start);
133  check_size(s, count * type_sizes2[type]);
134  tnput(s->buf, count, ptr_val, type, 0);
135  }
136 
137  s->num_entries++;
138 }
139 
141  enum TiffTags tag, enum TiffTypes type, int val){
142  uint16_t w = val;
143  uint32_t dw= val;
144  add_entry(s, tag, type, 1, type == TIFF_SHORT ? (void *)&w : (void *)&dw);
145 }
146 
157 static int encode_strip(TiffEncoderContext * s, const int8_t * src,
158  uint8_t * dst, int n, int compr)
159 {
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), src, 1, n, 2, 0xff, -1, 0);
181  case TIFF_LZW:
182  return ff_lzw_encode(s->lzws, src, n);
183  default:
184  return -1;
185  }
186 }
187 
188 static void pack_yuv(TiffEncoderContext * s, uint8_t * dst, int lnum)
189 {
190  AVFrame *p = &s->picture;
191  int i, j, k;
192  int w = (s->width - 1) / s->subsampling[0] + 1;
193  uint8_t *pu = &p->data[1][lnum / s->subsampling[1] * p->linesize[1]];
194  uint8_t *pv = &p->data[2][lnum / s->subsampling[1] * p->linesize[2]];
195  for (i = 0; i < w; i++){
196  for (j = 0; j < s->subsampling[1]; j++)
197  for (k = 0; k < s->subsampling[0]; k++)
198  *dst++ = p->data[0][(lnum + j) * p->linesize[0] +
199  i * s->subsampling[0] + k];
200  *dst++ = *pu++;
201  *dst++ = *pv++;
202  }
203 }
204 
205 static int encode_frame(AVCodecContext * avctx, AVPacket *pkt,
206  const AVFrame *pict, int *got_packet)
207 {
208  TiffEncoderContext *s = avctx->priv_data;
209  AVFrame *const p = &s->picture;
210  int i;
211  uint8_t *ptr;
212  uint8_t *offset;
213  uint32_t strips;
214  uint32_t *strip_sizes = NULL;
215  uint32_t *strip_offsets = NULL;
216  int bytes_per_row;
217  uint32_t res[2] = { 72, 1 }; // image resolution (72/1)
218  uint16_t bpp_tab[] = { 8, 8, 8, 8 };
219  int ret;
220  int is_yuv = 0;
221  uint8_t *yuv_line = NULL;
222  int shift_h, shift_v;
223  const AVPixFmtDescriptor* pfd;
224 
225  s->avctx = avctx;
226 
227  *p = *pict;
229  p->key_frame = 1;
230  avctx->coded_frame= &s->picture;
231 
232  s->width = avctx->width;
233  s->height = avctx->height;
234  s->subsampling[0] = 1;
235  s->subsampling[1] = 1;
236 
237  switch (avctx->pix_fmt) {
238  case AV_PIX_FMT_RGB48LE:
239  case AV_PIX_FMT_GRAY16LE:
240  case AV_PIX_FMT_RGB24:
241  case AV_PIX_FMT_GRAY8:
242  case AV_PIX_FMT_PAL8:
243  pfd = av_pix_fmt_desc_get(avctx->pix_fmt);
244  s->bpp = av_get_bits_per_pixel(pfd);
245  if (pfd->flags & PIX_FMT_PAL) {
247  } else if (pfd->flags & PIX_FMT_RGB) {
249  } else {
251  }
252  s->bpp_tab_size = pfd->nb_components;
253  for (i = 0; i < s->bpp_tab_size; i++) {
254  bpp_tab[i] = s->bpp / s->bpp_tab_size;
255  }
256  break;
258  s->bpp = 1;
260  s->bpp_tab_size = 0;
261  break;
263  s->bpp = 1;
265  s->bpp_tab_size = 0;
266  break;
267  case AV_PIX_FMT_YUV420P:
268  case AV_PIX_FMT_YUV422P:
269  case AV_PIX_FMT_YUV444P:
270  case AV_PIX_FMT_YUV410P:
271  case AV_PIX_FMT_YUV411P:
274  &shift_h, &shift_v);
275  s->bpp = 8 + (16 >> (shift_h + shift_v));
276  s->subsampling[0] = 1 << shift_h;
277  s->subsampling[1] = 1 << shift_v;
278  s->bpp_tab_size = 3;
279  is_yuv = 1;
280  break;
281  default:
283  "This colors format is not supported\n");
284  return -1;
285  }
286 
287  if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE || s->compr == TIFF_LZW)
288  //best choose for DEFLATE
289  s->rps = s->height;
290  else
291  s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1); // suggest size of strip
292  s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1]; // round rps up
293 
294  strips = (s->height - 1) / s->rps + 1;
295 
296  if (!pkt->data &&
297  (ret = av_new_packet(pkt, avctx->width * avctx->height * s->bpp * 2 +
298  avctx->height * 4 + FF_MIN_BUFFER_SIZE)) < 0) {
299  av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
300  return ret;
301  }
302  ptr = pkt->data;
303  s->buf_start = pkt->data;
304  s->buf = &ptr;
305  s->buf_size = pkt->size;
306 
307  if (check_size(s, 8))
308  goto fail;
309 
310  // write header
311  bytestream_put_le16(&ptr, 0x4949);
312  bytestream_put_le16(&ptr, 42);
313 
314  offset = ptr;
315  bytestream_put_le32(&ptr, 0);
316 
317  strip_sizes = av_mallocz(sizeof(*strip_sizes) * strips);
318  strip_offsets = av_mallocz(sizeof(*strip_offsets) * strips);
319  if (!strip_sizes || !strip_offsets) {
320  ret = AVERROR(ENOMEM);
321  goto fail;
322  }
323 
324  bytes_per_row = (((s->width - 1)/s->subsampling[0] + 1) * s->bpp
325  * s->subsampling[0] * s->subsampling[1] + 7) >> 3;
326  if (is_yuv){
327  yuv_line = av_malloc(bytes_per_row);
328  if (yuv_line == NULL){
329  av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");
330  ret = AVERROR(ENOMEM);
331  goto fail;
332  }
333  }
334 
335 #if CONFIG_ZLIB
336  if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
337  uint8_t *zbuf;
338  int zlen, zn;
339  int j;
340 
341  zlen = bytes_per_row * s->rps;
342  zbuf = av_malloc(zlen);
343  if (!zbuf) {
344  ret = AVERROR(ENOMEM);
345  goto fail;
346  }
347  strip_offsets[0] = ptr - pkt->data;
348  zn = 0;
349  for (j = 0; j < s->rps; j++) {
350  if (is_yuv){
351  pack_yuv(s, yuv_line, j);
352  memcpy(zbuf + zn, yuv_line, bytes_per_row);
353  j += s->subsampling[1] - 1;
354  }
355  else
356  memcpy(zbuf + j * bytes_per_row,
357  p->data[0] + j * p->linesize[0], bytes_per_row);
358  zn += bytes_per_row;
359  }
360  ret = encode_strip(s, zbuf, ptr, zn, s->compr);
361  av_free(zbuf);
362  if (ret < 0) {
363  av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
364  goto fail;
365  }
366  ptr += ret;
367  strip_sizes[0] = ptr - pkt->data - strip_offsets[0];
368  } else
369 #endif
370  {
371  if (s->compr == TIFF_LZW) {
373  if (!s->lzws) {
374  ret = AVERROR(ENOMEM);
375  goto fail;
376  }
377  }
378  for (i = 0; i < s->height; i++) {
379  if (strip_sizes[i / s->rps] == 0) {
380  if(s->compr == TIFF_LZW){
381  ff_lzw_encode_init(s->lzws, ptr, s->buf_size - (*s->buf - s->buf_start),
382  12, FF_LZW_TIFF, put_bits);
383  }
384  strip_offsets[i / s->rps] = ptr - pkt->data;
385  }
386  if (is_yuv){
387  pack_yuv(s, yuv_line, i);
388  ret = encode_strip(s, yuv_line, ptr, bytes_per_row, s->compr);
389  i += s->subsampling[1] - 1;
390  }
391  else
392  ret = encode_strip(s, p->data[0] + i * p->linesize[0],
393  ptr, bytes_per_row, s->compr);
394  if (ret < 0) {
395  av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
396  goto fail;
397  }
398  strip_sizes[i / s->rps] += ret;
399  ptr += ret;
400  if(s->compr == TIFF_LZW && (i==s->height-1 || i%s->rps == s->rps-1)){
402  strip_sizes[(i / s->rps )] += ret ;
403  ptr += ret;
404  }
405  }
406  if(s->compr == TIFF_LZW)
407  av_free(s->lzws);
408  }
409 
410  s->num_entries = 0;
411 
415 
416  if (s->bpp_tab_size)
417  add_entry(s, TIFF_BPP, TIFF_SHORT, s->bpp_tab_size, bpp_tab);
418 
421  add_entry(s, TIFF_STRIP_OFFS, TIFF_LONG, strips, strip_offsets);
422 
423  if (s->bpp_tab_size)
425 
427  add_entry(s, TIFF_STRIP_SIZE, TIFF_LONG, strips, strip_sizes);
428  add_entry(s, TIFF_XRES, TIFF_RATIONAL, 1, res);
429  add_entry(s, TIFF_YRES, TIFF_RATIONAL, 1, res);
431 
432  if(!(avctx->flags & CODEC_FLAG_BITEXACT))
434  strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT);
435 
436  if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
437  uint16_t pal[256 * 3];
438  for (i = 0; i < 256; i++) {
439  uint32_t rgb = *(uint32_t *) (p->data[1] + i * 4);
440  pal[i] = ((rgb >> 16) & 0xff) * 257;
441  pal[i + 256] = ((rgb >> 8 ) & 0xff) * 257;
442  pal[i + 512] = ( rgb & 0xff) * 257;
443  }
444  add_entry(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal);
445  }
446  if (is_yuv){
448  uint32_t refbw[12] = {15, 1, 235, 1, 128, 1, 240, 1, 128, 1, 240, 1};
451  }
452  bytestream_put_le32(&offset, ptr - pkt->data); // write offset to dir
453 
454  if (check_size(s, 6 + s->num_entries * 12)) {
455  ret = AVERROR(EINVAL);
456  goto fail;
457  }
458  bytestream_put_le16(&ptr, s->num_entries); // write tag count
459  bytestream_put_buffer(&ptr, s->entries, s->num_entries * 12);
460  bytestream_put_le32(&ptr, 0);
461 
462  pkt->size = ptr - pkt->data;
463  pkt->flags |= AV_PKT_FLAG_KEY;
464  *got_packet = 1;
465 
466 fail:
467  av_free(strip_sizes);
468  av_free(strip_offsets);
469  av_free(yuv_line);
470  return ret;
471 }
472 
473 #define OFFSET(x) offsetof(TiffEncoderContext, x)
474 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
475 static const AVOption options[] = {
476  { "compression_algo", NULL, OFFSET(compr), AV_OPT_TYPE_INT, {.i64 = TIFF_PACKBITS}, TIFF_RAW, TIFF_DEFLATE, VE, "compression_algo" },
477  { "packbits", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = TIFF_PACKBITS}, 0, 0, VE, "compression_algo" },
478  { "raw", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = TIFF_RAW}, 0, 0, VE, "compression_algo" },
479  { "lzw", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = TIFF_LZW}, 0, 0, VE, "compression_algo" },
480 #if CONFIG_ZLIB
481  { "deflate", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = TIFF_DEFLATE}, 0, 0, VE, "compression_algo" },
482 #endif
483  { NULL },
484 };
485 
486 static const AVClass tiffenc_class = {
487  .class_name = "TIFF encoder",
488  .item_name = av_default_item_name,
489  .option = options,
490  .version = LIBAVUTIL_VERSION_INT,
491 };
492 
494  .name = "tiff",
495  .type = AVMEDIA_TYPE_VIDEO,
496  .id = AV_CODEC_ID_TIFF,
497  .priv_data_size = sizeof(TiffEncoderContext),
498  .encode2 = encode_frame,
499  .pix_fmts = (const enum AVPixelFormat[]) {
506  },
507  .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
508  .priv_class = &tiffenc_class,
509 };
int photometric_interpretation
photometric interpretation
Definition: tiffenc.c:60
Definition: tiff.h:47
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:61
Definition: tiff.h:65
int num_entries
number of entires
Definition: tiffenc.c:64
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:1435
This structure describes decoded (raw) audio or video data.
Definition: avcodec.h:989
unsigned int bpp
bits per pixel
Definition: tiffenc.c:57
AVOption.
Definition: opt.h:233
static int check_size(TiffEncoderContext *s, uint64_t need)
Check free space in buffer.
Definition: tiffenc.c:79
Definition: tiff.h:46
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:70
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:67
int strips
number of strips
Definition: tiffenc.c:61
AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2725
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:1408
AVCodec ff_tiff_encoder
Definition: tiffenc.c:493
TIFF tables.
int size
Definition: avcodec.h:916
int ff_lzw_encode(struct LZWEncodeState *s, const uint8_t *inbuf, int insize)
LZW main compress function.
Definition: lzwenc.c:226
uint8_t ** buf
actual position in buffer
Definition: tiffenc.c:65
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1533
static void add_entry(TiffEncoderContext *s, enum TiffTags tag, enum TiffTypes type, int count, const void *ptr_val)
Add entry to directory in tiff header.
Definition: tiffenc.c:117
int height
picture height
Definition: tiffenc.c:56
struct TiffEncoderContext TiffEncoderContext
int compr
compression level
Definition: tiffenc.c:58
AVCodec.
Definition: avcodec.h:2960
struct LZWEncodeState * lzws
LZW Encode state.
Definition: tiffenc.c:69
Definition: tiff.h:69
uint8_t * buf_start
pointer to first byte in buffer
Definition: tiffenc.c:66
#define OFFSET(x)
Definition: tiffenc.c:473
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:38
uint8_t
8 bit with PIX_FMT_RGB32 palette
Definition: pixfmt.h:76
AVOptions.
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as lit...
Definition: pixfmt.h:109
static void add_entry1(TiffEncoderContext *s, enum TiffTags tag, enum TiffTypes type, int val)
Definition: tiffenc.c:140
uint8_t * data
Definition: avcodec.h:915
LZW encode state.
Definition: lzwenc.c:49
static void pack_yuv(TiffEncoderContext *s, uint8_t *dst, int lnum)
Definition: tiffenc.c:188
uint32_t tag
Definition: movenc.c:802
static const uint8_t type_sizes[6]
sizes of various TIFF field types (string size = 100)
Definition: tiff.h:86
Definition: tiff.h:56
#define VE
Definition: tiffenc.c:474
int ff_lzw_encode_flush(struct LZWEncodeState *s, void(*lzw_flush_put_bits)(struct PutBitContext *))
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:56
int buf_size
buffer size
Definition: tiffenc.c:67
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:139
#define pv
Definition: regdef.h:60
int av_pix_fmt_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
Utility function to access log2_chroma_w log2_chroma_h from the pixel format AVPixFmtDescriptor.
Definition: pixdesc.c:1460
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:88
static const uint8_t type_sizes2[6]
sizes of various TIFF field types (string size = 1)
Definition: tiffenc.c:46
int flags
CODEC_FLAG_*.
Definition: avcodec.h:1434
#define PIX_FMT_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:87
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:146
const char * name
Name of the codec implementation.
Definition: avcodec.h:2967
static void put_bits(PutBitContext *s, int n, unsigned int value)
Write up to 31 bits into a bitstream.
Definition: put_bits.h:136
AVFrame picture
Definition: tiffenc.c:53
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:921
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:69
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:57
enum AVPictureType pict_type
Picture type of the frame, see ?_TYPE below.
Definition: avcodec.h:1065
int width
picture width / height.
Definition: avcodec.h:1508
int width
picture width
Definition: tiffenc.c:55
LIBAVUTIL_VERSION_INT
Definition: eval.c:52
NULL
Definition: eval.c:52
Definition: tiff.h:38
external API header
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet)
Definition: tiffenc.c:205
int linesize[AV_NUM_DATA_POINTERS]
Size, in bytes, of the data for each picture/channel plane.
Definition: avcodec.h:1008
av_default_item_name
Definition: dnxhdenc.c:43
uint8_t flags
Definition: pixdesc.h:76
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:55
main external API structure.
Definition: avcodec.h:1339
static const AVClass tiffenc_class
Definition: tiffenc.c:486
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:71
Describe the class of an AVClass context structure.
Definition: log.h:33
#define TIFF_MAX_ENTRY
Definition: tiffenc.c:43
static void tnput(uint8_t **p, int n, const uint8_t *val, enum TiffTypes type, int flip)
Put n values to buffer.
Definition: tiffenc.c:98
uint16_t subsampling[2]
YUV subsampling factors.
Definition: tiffenc.c:68
uint8_t entries[TIFF_MAX_ENTRY *12]
entires in header
Definition: tiffenc.c:63
#define PIX_FMT_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale)
Definition: pixdesc.h:91
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: avcodec.h:997
LZW decoding routines.
TiffTypes
Definition: tiff.h:77
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:75
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
Y , 8bpp.
Definition: pixfmt.h:73
void ff_lzw_encode_init(struct LZWEncodeState *s, uint8_t *outbuf, int outsize, int maxbits, enum FF_LZW_MODES mode, void(*lzw_put_bits)(struct PutBitContext *, int, unsigned int))
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:86
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:74
int bpp_tab_size
bpp_tab size
Definition: tiffenc.c:59
static void flip(AVCodecContext *avctx, AVPicture *picture)
Definition: rawdec.c:110
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:72
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
Definition: bytestream.h:327
void * priv_data
Definition: avcodec.h:1382
static const AVOption options[]
Definition: tiffenc.c:475
Y , 16bpp, little-endian.
Definition: pixfmt.h:99
int key_frame
1 -> keyframe, 0-> not
Definition: avcodec.h:1058
AVCodecContext * avctx
Definition: tiffenc.c:52
int ff_rle_encode(uint8_t *outbuf, int out_size, const uint8_t *ptr, int bpp, int w, int add_rep, int xor_rep, int add_raw, int xor_raw)
RLE compress the row, with maximum size of out_size.
Definition: rle.c:58
Definition: tiff.h:81
const int ff_lzw_encode_state_size
Definition: lzwenc.c:66
int rps
row per strip
Definition: tiffenc.c:62
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
This structure stores compressed data.
Definition: avcodec.h:898
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:158
for(j=16;j >0;--j)
TiffTags
abridged list of TIFF tags
Definition: tiff.h:34
static int encode_strip(TiffEncoderContext *s, const int8_t *src, uint8_t *dst, int n, int compr)
Encode one strip in tiff file.
Definition: tiffenc.c:157
if(!(ptr_align%ac->ptr_align)&&samples_align >=aligned_len)
bitstream writer API