Libav
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 "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 
46 static const uint8_t type_sizes2[6] = {
47  0, 1, 1, 2, 4, 8
48 };
49 
50 typedef struct TiffEncoderContext {
51  AVClass *class;
53 
54  int width;
55  int height;
56  unsigned int bpp;
57  int compr;
60  int strips;
61  int rps;
66  int buf_size;
67  uint16_t subsampling[2];
68  struct LZWEncodeState *lzws;
70 
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 
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 
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  check_size(s, count * type_sizes2[type]);
131  tnput(s->buf, count, ptr_val, type, 0);
132  }
133 
134  s->num_entries++;
135 }
136 
138  enum TiffTags tag, enum TiffTypes type, int val)
139 {
140  uint16_t w = val;
141  uint32_t dw = val;
142  add_entry(s, tag, type, 1, type == TIFF_SHORT ? (void *)&w : (void *)&dw);
143 }
144 
155 static int encode_strip(TiffEncoderContext *s, const int8_t *src,
156  uint8_t *dst, int n, int compr)
157 {
158  switch (compr) {
159 #if CONFIG_ZLIB
160  case TIFF_DEFLATE:
161  case TIFF_ADOBE_DEFLATE:
162  {
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");
166  return -1;
167  }
168  return zlen;
169  }
170 #endif
171  case TIFF_RAW:
172  if (check_size(s, n))
173  return -1;
174  memcpy(dst, src, n);
175  return n;
176  case TIFF_PACKBITS:
177  return ff_rle_encode(dst, s->buf_size - (*s->buf - s->buf_start),
178  src, 1, n, 2, 0xff, -1, 0);
179  case TIFF_LZW:
180  return ff_lzw_encode(s->lzws, src, n);
181  default:
182  return -1;
183  }
184 }
185 
186 static void pack_yuv(TiffEncoderContext *s, const AVFrame *p,
187  uint8_t *dst, int lnum)
188 {
189  int i, j, k;
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];
198  *dst++ = *pu++;
199  *dst++ = *pv++;
200  }
201 }
202 
203 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
204  const AVFrame *pict, int *got_packet)
205 {
206  TiffEncoderContext *s = avctx->priv_data;
207  const AVFrame *const p = pict;
208  int i;
209  uint8_t *ptr;
210  uint8_t *offset;
211  uint32_t strips;
212  uint32_t *strip_sizes = NULL;
213  uint32_t *strip_offsets = NULL;
214  int bytes_per_row;
215  uint32_t res[2] = { 72, 1 }; // image resolution (72/1)
216  uint16_t bpp_tab[] = { 8, 8, 8, 8 };
217  int ret;
218  int is_yuv = 0;
219  uint8_t *yuv_line = NULL;
220  int shift_h, shift_v;
221  int packet_size;
222  const AVPixFmtDescriptor *pfd;
223 
224  s->avctx = avctx;
225 
226  s->width = avctx->width;
227  s->height = avctx->height;
228  s->subsampling[0] = 1;
229  s->subsampling[1] = 1;
230 
231  switch (avctx->pix_fmt) {
232  case AV_PIX_FMT_RGB48LE:
233  case AV_PIX_FMT_GRAY16LE:
234  case AV_PIX_FMT_RGBA:
235  case AV_PIX_FMT_RGB24:
236  case AV_PIX_FMT_GRAY8:
237  case AV_PIX_FMT_PAL8:
238  pfd = av_pix_fmt_desc_get(avctx->pix_fmt);
239  s->bpp = av_get_bits_per_pixel(pfd);
240  if (pfd->flags & AV_PIX_FMT_FLAG_PAL)
242  else if (pfd->flags & AV_PIX_FMT_FLAG_RGB)
244  else
246  s->bpp_tab_size = pfd->nb_components;
247  for (i = 0; i < s->bpp_tab_size; i++)
248  bpp_tab[i] = s->bpp / s->bpp_tab_size;
249  break;
251  s->bpp = 1;
253  s->bpp_tab_size = 0;
254  break;
256  s->bpp = 1;
258  s->bpp_tab_size = 0;
259  break;
260  case AV_PIX_FMT_YUV420P:
261  case AV_PIX_FMT_YUV422P:
262  case AV_PIX_FMT_YUV444P:
263  case AV_PIX_FMT_YUV410P:
264  case AV_PIX_FMT_YUV411P:
265  av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &shift_h, &shift_v);
267  s->bpp = 8 + (16 >> (shift_h + shift_v));
268  s->subsampling[0] = 1 << shift_h;
269  s->subsampling[1] = 1 << shift_v;
270  s->bpp_tab_size = 3;
271  is_yuv = 1;
272  break;
273  default:
275  "This colors format is not supported\n");
276  return -1;
277  }
278 
279  if (s->compr == TIFF_DEFLATE ||
280  s->compr == TIFF_ADOBE_DEFLATE ||
281  s->compr == TIFF_LZW)
282  // best choice for DEFLATE
283  s->rps = s->height;
284  else
285  // suggest size of strip
286  s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1);
287  // round rps up
288  s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1];
289 
290  strips = (s->height - 1) / s->rps + 1;
291 
292  packet_size = avctx->height * ((avctx->width * s->bpp + 7) >> 3) * 2 +
293  avctx->height * 4 + FF_MIN_BUFFER_SIZE;
294 
295  if (!pkt->data &&
296  (ret = av_new_packet(pkt, packet_size)) < 0) {
297  av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
298  return ret;
299  }
300  ptr = pkt->data;
301  s->buf_start = pkt->data;
302  s->buf = &ptr;
303  s->buf_size = pkt->size;
304 
305  if (check_size(s, 8))
306  goto fail;
307 
308  // write header
309  bytestream_put_le16(&ptr, 0x4949);
310  bytestream_put_le16(&ptr, 42);
311 
312  offset = ptr;
313  bytestream_put_le32(&ptr, 0);
314 
315  strip_sizes = av_mallocz(sizeof(*strip_sizes) * strips);
316  strip_offsets = av_mallocz(sizeof(*strip_offsets) * strips);
317  if (!strip_sizes || !strip_offsets) {
318  ret = AVERROR(ENOMEM);
319  goto fail;
320  }
321 
322  bytes_per_row = (((s->width - 1) / s->subsampling[0] + 1) * s->bpp *
323  s->subsampling[0] * s->subsampling[1] + 7) >> 3;
324  if (is_yuv) {
325  yuv_line = av_malloc(bytes_per_row);
326  if (!yuv_line) {
327  av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");
328  ret = AVERROR(ENOMEM);
329  goto fail;
330  }
331  }
332 
333 #if CONFIG_ZLIB
334  if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
335  uint8_t *zbuf;
336  int zlen, zn;
337  int j;
338 
339  zlen = bytes_per_row * s->rps;
340  zbuf = av_malloc(zlen);
341  if (!zbuf) {
342  ret = AVERROR(ENOMEM);
343  goto fail;
344  }
345  strip_offsets[0] = ptr - pkt->data;
346  zn = 0;
347  for (j = 0; j < s->rps; j++) {
348  if (is_yuv) {
349  pack_yuv(s, p, yuv_line, j);
350  memcpy(zbuf + zn, yuv_line, bytes_per_row);
351  j += s->subsampling[1] - 1;
352  } else
353  memcpy(zbuf + j * bytes_per_row,
354  p->data[0] + j * p->linesize[0], bytes_per_row);
355  zn += bytes_per_row;
356  }
357  ret = encode_strip(s, zbuf, ptr, zn, s->compr);
358  av_free(zbuf);
359  if (ret < 0) {
360  av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
361  goto fail;
362  }
363  ptr += ret;
364  strip_sizes[0] = ptr - pkt->data - strip_offsets[0];
365  } else
366 #endif
367  if (s->compr == TIFF_LZW) {
369  if (!s->lzws) {
370  ret = AVERROR(ENOMEM);
371  goto fail;
372  }
373  }
374  for (i = 0; i < s->height; i++) {
375  if (strip_sizes[i / s->rps] == 0) {
376  if (s->compr == TIFF_LZW) {
377  ff_lzw_encode_init(s->lzws, ptr,
378  s->buf_size - (*s->buf - s->buf_start),
379  12, FF_LZW_TIFF, put_bits);
380  }
381  strip_offsets[i / s->rps] = ptr - pkt->data;
382  }
383  if (is_yuv) {
384  pack_yuv(s, p, yuv_line, i);
385  ret = encode_strip(s, yuv_line, ptr, bytes_per_row, s->compr);
386  i += s->subsampling[1] - 1;
387  } else
388  ret = encode_strip(s, p->data[0] + i * p->linesize[0],
389  ptr, bytes_per_row, s->compr);
390  if (ret < 0) {
391  av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
392  goto fail;
393  }
394  strip_sizes[i / s->rps] += ret;
395  ptr += ret;
396  if (s->compr == TIFF_LZW &&
397  (i == s->height - 1 || i % s->rps == s->rps - 1)) {
399  strip_sizes[(i / s->rps)] += ret;
400  ptr += ret;
401  }
402  }
403  if (s->compr == TIFF_LZW)
404  av_free(s->lzws);
405 
406  s->num_entries = 0;
407 
411 
412  if (s->bpp_tab_size)
413  add_entry(s, TIFF_BPP, TIFF_SHORT, s->bpp_tab_size, bpp_tab);
414 
417  add_entry(s, TIFF_STRIP_OFFS, TIFF_LONG, strips, strip_offsets);
418 
419  if (s->bpp_tab_size)
421 
423  add_entry(s, TIFF_STRIP_SIZE, TIFF_LONG, strips, strip_sizes);
424  add_entry(s, TIFF_XRES, TIFF_RATIONAL, 1, res);
425  add_entry(s, TIFF_YRES, TIFF_RATIONAL, 1, res);
427 
428  if (!(avctx->flags & CODEC_FLAG_BITEXACT))
430  strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT);
431 
432  if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
433  uint16_t pal[256 * 3];
434  for (i = 0; i < 256; i++) {
435  uint32_t rgb = *(uint32_t *) (p->data[1] + i * 4);
436  pal[i] = ((rgb >> 16) & 0xff) * 257;
437  pal[i + 256] = ((rgb >> 8) & 0xff) * 257;
438  pal[i + 512] = (rgb & 0xff) * 257;
439  }
440  add_entry(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal);
441  }
442  if (is_yuv) {
444  uint32_t refbw[12] = { 15, 1, 235, 1, 128, 1, 240, 1, 128, 1, 240, 1 };
447  }
448  // write offset to dir
449  bytestream_put_le32(&offset, ptr - pkt->data);
450 
451  if (check_size(s, 6 + s->num_entries * 12)) {
452  ret = AVERROR(EINVAL);
453  goto fail;
454  }
455  bytestream_put_le16(&ptr, s->num_entries); // write tag count
456  bytestream_put_buffer(&ptr, s->entries, s->num_entries * 12);
457  bytestream_put_le32(&ptr, 0);
458 
459  pkt->size = ptr - pkt->data;
460  pkt->flags |= AV_PKT_FLAG_KEY;
461  *got_packet = 1;
462 
463 fail:
464  av_free(strip_sizes);
465  av_free(strip_offsets);
466  av_free(yuv_line);
467  return ret;
468 }
469 
471 {
472  avctx->coded_frame = av_frame_alloc();
473  if (!avctx->coded_frame)
474  return AVERROR(ENOMEM);
475 
477  avctx->coded_frame->key_frame = 1;
478 
479  return 0;
480 }
481 
483 {
484  av_frame_free(&avctx->coded_frame);
485  return 0;
486 }
487 
488 #define OFFSET(x) offsetof(TiffEncoderContext, x)
489 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
490 static const AVOption options[] = {
491  { "compression_algo", NULL, OFFSET(compr), AV_OPT_TYPE_INT, { .i64 = TIFF_PACKBITS }, TIFF_RAW, TIFF_DEFLATE, VE, "compression_algo" },
492  { "packbits", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_PACKBITS }, 0, 0, VE, "compression_algo" },
493  { "raw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_RAW }, 0, 0, VE, "compression_algo" },
494  { "lzw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_LZW }, 0, 0, VE, "compression_algo" },
495 #if CONFIG_ZLIB
496  { "deflate", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_DEFLATE }, 0, 0, VE, "compression_algo" },
497 #endif
498  { NULL },
499 };
500 
501 static const AVClass tiffenc_class = {
502  .class_name = "TIFF encoder",
503  .item_name = av_default_item_name,
504  .option = options,
505  .version = LIBAVUTIL_VERSION_INT,
506 };
507 
509  .name = "tiff",
510  .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
511  .type = AVMEDIA_TYPE_VIDEO,
512  .id = AV_CODEC_ID_TIFF,
513  .priv_data_size = sizeof(TiffEncoderContext),
514  .init = encode_init,
515  .close = encode_close,
516  .encode2 = encode_frame,
517  .pix_fmts = (const enum AVPixelFormat[]) {
525  },
526  .priv_class = &tiffenc_class,
527 };
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:112
Definition: tiff.h:47
static av_cold int encode_init(AVCodecContext *avctx)
Definition: tiffenc.c:470
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:62
Definition: tiff.h:65
int num_entries
number of entries
Definition: tiffenc.c:63
static av_cold int encode_close(AVCodecContext *avctx)
Definition: tiffenc.c:482
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:1599
This structure describes decoded (raw) audio or video data.
Definition: frame.h:135
TiffPhotometric
Definition: tiff.h:86
unsigned int bpp
bits per pixel
Definition: tiffenc.c:56
AVOption.
Definition: opt.h:234
static int check_size(TiffEncoderContext *s, uint64_t need)
Check free space in buffer.
Definition: tiffenc.c:77
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:60
AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2532
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:1571
AVCodec ff_tiff_encoder
Definition: tiffenc.c:508
TIFF tables.
int size
Definition: avcodec.h:974
int ff_lzw_encode(struct LZWEncodeState *s, const uint8_t *inbuf, int insize)
LZW main compress function.
Definition: lzwenc.c:227
uint8_t ** buf
actual position in buffer
Definition: tiffenc.c:64
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1254
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:115
int height
picture height
Definition: tiffenc.c:55
int compr
compression level
Definition: tiffenc.c:57
AVCodec.
Definition: avcodec.h:2796
struct LZWEncodeState * lzws
LZW encode state.
Definition: tiffenc.c:68
Definition: tiff.h:69
uint8_t * buf_start
pointer to first byte in buffer
Definition: tiffenc.c:65
#define OFFSET(x)
Definition: tiffenc.c:488
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
#define av_cold
Definition: attributes.h:66
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:57
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:113
static void add_entry1(TiffEncoderContext *s, enum TiffTags tag, enum TiffTypes type, int val)
Definition: tiffenc.c:137
uint8_t * data
Definition: avcodec.h:973
LZW encode state.
Definition: lzwenc.c:50
uint32_t tag
Definition: movenc.c:844
static const uint8_t type_sizes[6]
sizes of various TIFF field types (string size = 100)
Definition: tiff.h:105
#define CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:658
Definition: tiff.h:56
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1019
#define VE
Definition: tiffenc.c:489
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:81
int buf_size
buffer size
Definition: tiffenc.c:66
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:186
#define AVERROR(e)
Definition: error.h:43
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:128
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:69
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:150
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:1144
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:168
const char * name
Name of the codec implementation.
Definition: avcodec.h:2803
static void put_bits(PutBitContext *s, int n, unsigned int value)
Write up to 31 bits into a bitstream.
Definition: put_bits.h:134
#define FFMAX(a, b)
Definition: common.h:55
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:96
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:979
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:71
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:196
#define FF_MIN_BUFFER_SIZE
minimum encoding buffer size Used to avoid some checks during header writing.
Definition: avcodec.h:538
int width
picture width / height.
Definition: avcodec.h:1224
int width
picture width
Definition: tiffenc.c:54
LIBAVUTIL_VERSION_INT
Definition: eval.c:55
if(ac->has_optimized_func)
NULL
Definition: eval.c:55
Definition: tiff.h:38
Libavcodec external API header.
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet)
Definition: tiffenc.c:203
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:153
av_default_item_name
Definition: dnxhdenc.c:52
uint8_t flags
Definition: pixdesc.h:90
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
main external API structure.
Definition: avcodec.h:1050
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:490
static const AVClass tiffenc_class
Definition: tiffenc.c:501
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:96
uint16_t subsampling[2]
YUV subsampling factors.
Definition: tiffenc.c:67
uint8_t entries[TIFF_MAX_ENTRY *12]
entries in header
Definition: tiffenc.c:62
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:141
LZW decoding routines.
TiffTypes
Definition: tiff.h:78
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:75
static void pack_yuv(TiffEncoderContext *s, const AVFrame *p, uint8_t *dst, int lnum)
Definition: tiffenc.c:186
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:83
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:58
static void flip(AVCodecContext *avctx, AVPicture *picture)
Definition: rawdec.c:132
FF_ENABLE_DEPRECATION_WARNINGS 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:1625
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:72
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
Definition: bytestream.h:363
void * priv_data
Definition: avcodec.h:1092
static const AVOption options[]
Definition: tiffenc.c:490
Y , 16bpp, little-endian.
Definition: pixfmt.h:101
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:191
#define LIBAVCODEC_IDENT
Definition: version.h:43
AVCodecContext * avctx
Definition: tiffenc.c:52
enum TiffPhotometric photometric_interpretation
photometric interpretation
Definition: tiffenc.c:59
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:82
const int ff_lzw_encode_state_size
Definition: lzwenc.c:67
int rps
row per strip
Definition: tiffenc.c:61
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
This structure stores compressed data.
Definition: avcodec.h:950
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:205
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:155
bitstream writer API