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tiffenc.c File Reference

TIFF image encoder. More...

#include "config.h"
#include "libavutil/imgutils.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
#include "lzw.h"
#include "put_bits.h"
#include "rle.h"
#include "tiff.h"

Go to the source code of this file.

Data Structures

struct  TiffEncoderContext
 

Macros

#define TIFF_MAX_ENTRY   32
 
#define ADD_ENTRY(s, tag, type, count, ptr_val)
 
#define ADD_ENTRY1(s, tag, type, val)
 
#define OFFSET(x)   offsetof(TiffEncoderContext, x)
 
#define VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 

Functions

static int check_size (TiffEncoderContext *s, uint64_t need)
 Check free space in buffer.
 
static void tnput (uint8_t **p, int n, const uint8_t *val, enum TiffTypes type, int flip)
 Put n values to buffer.
 
static int add_entry (TiffEncoderContext *s, enum TiffTags tag, enum TiffTypes type, int count, const void *ptr_val)
 Add entry to directory in tiff header.
 
static int add_entry1 (TiffEncoderContext *s, enum TiffTags tag, enum TiffTypes type, int val)
 
static int encode_strip (TiffEncoderContext *s, const int8_t *src, uint8_t *dst, int n, int compr)
 Encode one strip in tiff file.
 
static void pack_yuv (TiffEncoderContext *s, const AVFrame *p, uint8_t *dst, int lnum)
 
static int encode_frame (AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet)
 
static av_cold int encode_init (AVCodecContext *avctx)
 
static av_cold int encode_close (AVCodecContext *avctx)
 

Variables

static const uint8_t type_sizes2 [14]
 sizes of various TIFF field types (string size = 1)
 
static const AVOption options []
 
static const AVClass tiffenc_class
 
AVCodec ff_tiff_encoder
 

Detailed Description

TIFF image encoder.

Author
Bartlomiej Wolowiec

Definition in file tiffenc.c.

Macro Definition Documentation

#define TIFF_MAX_ENTRY   32

Definition at line 45 of file tiffenc.c.

Referenced by add_entry().

#define ADD_ENTRY (   s,
  tag,
  type,
  count,
  ptr_val 
)
Value:
do { \
ret = add_entry(s, tag, type, count, ptr_val); \
if (ret < 0) \
goto fail; \
} while(0);

Definition at line 228 of file tiffenc.c.

Referenced by encode_frame().

#define ADD_ENTRY1 (   s,
  tag,
  type,
  val 
)
Value:
do { \
ret = add_entry1(s, tag, type, val); \
if (ret < 0) \
goto fail; \
} while(0);

Definition at line 235 of file tiffenc.c.

Referenced by encode_frame().

#define OFFSET (   x)    offsetof(TiffEncoderContext, x)

Definition at line 544 of file tiffenc.c.

Definition at line 545 of file tiffenc.c.

Function Documentation

static int check_size ( TiffEncoderContext s,
uint64_t  need 
)
inlinestatic

Check free space in buffer.

Parameters
sTiff context
needNeeded bytes
Returns
0 - ok, 1 - no free space

Definition at line 87 of file tiffenc.c.

Referenced by add_entry(), encode_frame(), and encode_strip().

static void tnput ( uint8_t **  p,
int  n,
const uint8_t val,
enum TiffTypes  type,
int  flip 
)
static

Put n values to buffer.

Parameters
ppointer to pointer to output buffer
nnumber of values
valpointer to values
typetype of values
flip= 0 - normal copy, >0 - flip

Definition at line 106 of file tiffenc.c.

Referenced by add_entry().

static int add_entry ( TiffEncoderContext s,
enum TiffTags  tag,
enum TiffTypes  type,
int  count,
const void ptr_val 
)
static

Add entry to directory in tiff header.

Parameters
sTiff context
tagtag that identifies the entry
typeentry type
countthe number of values
ptr_valpointer to values

Definition at line 126 of file tiffenc.c.

Referenced by add_entry1().

static int add_entry1 ( TiffEncoderContext s,
enum TiffTags  tag,
enum TiffTypes  type,
int  val 
)
static

Definition at line 150 of file tiffenc.c.

static int encode_strip ( TiffEncoderContext s,
const int8_t *  src,
uint8_t dst,
int  n,
int  compr 
)
static

Encode one strip in tiff file.

Parameters
sTiff context
srcinput buffer
dstoutput buffer
nsize of input buffer
comprcompression method
Returns
number of output bytes. If an output error is encountered, -1 is returned

Definition at line 169 of file tiffenc.c.

Referenced by encode_frame().

static void pack_yuv ( TiffEncoderContext s,
const AVFrame p,
uint8_t dst,
int  lnum 
)
static

Definition at line 200 of file tiffenc.c.

Referenced by encode_frame().

static int encode_frame ( AVCodecContext avctx,
AVPacket pkt,
const AVFrame pict,
int *  got_packet 
)
static

according to CCIR Recommendation 601.1

Definition at line 242 of file tiffenc.c.

static av_cold int encode_init ( AVCodecContext avctx)
static

Definition at line 517 of file tiffenc.c.

static av_cold int encode_close ( AVCodecContext avctx)
static

Definition at line 532 of file tiffenc.c.

Variable Documentation

const uint8_t type_sizes2[14]
static
Initial value:
= {
0, 1, 1, 2, 4, 8, 1, 1, 2, 4, 8, 4, 8, 4
}

sizes of various TIFF field types (string size = 1)

Definition at line 48 of file tiffenc.c.

Referenced by add_entry(), and tnput().

const AVOption options[]
static
Initial value:
= {
{"dpi", "set the image resolution (in dpi)", OFFSET(dpi), AV_OPT_TYPE_INT, {.i64 = 72}, 1, 0x10000, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_ENCODING_PARAM},
{ "compression_algo", NULL, OFFSET(compr), AV_OPT_TYPE_INT, { .i64 = TIFF_PACKBITS }, TIFF_RAW, TIFF_DEFLATE, VE, "compression_algo" },
{ "packbits", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_PACKBITS }, 0, 0, VE, "compression_algo" },
{ "raw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_RAW }, 0, 0, VE, "compression_algo" },
{ "lzw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_LZW }, 0, 0, VE, "compression_algo" },
{ NULL },
}

Definition at line 546 of file tiffenc.c.

const AVClass tiffenc_class
static
Initial value:
= {
.class_name = "TIFF encoder",
.item_name = av_default_item_name,
.option = options,
}

Definition at line 558 of file tiffenc.c.

AVCodec ff_tiff_encoder