libavcodec/tiffenc.c File Reference

TIFF image encoder. More...

#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "bytestream.h"
#include "tiff.h"
#include "rle.h"
#include "lzw.h"
#include "put_bits.h"

Go to the source code of this file.

Data Structures

struct  TiffEncoderContext

Defines

#define TIFF_MAX_ENTRY   32
#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 void add_entry (TiffEncoderContext *s, enum TiffTags tag, enum TiffTypes type, int count, const void *ptr_val)
 Add entry to directory in tiff header.
static void 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, uint8_t *dst, int lnum)
static int encode_frame (AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data)

Variables

static const uint8_t type_sizes2 [6]
 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.

Define Documentation

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

Definition at line 468 of file tiffenc.c.

#define TIFF_MAX_ENTRY   32

Definition at line 42 of file tiffenc.c.

Referenced by add_entry().

#define VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 469 of file tiffenc.c.

Function Documentation

static void 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:
s Tiff context
tag Tag that identifies the entry
type Entry type
count The number of values
ptr_val Pointer to values

Definition at line 117 of file tiffenc.c.

Referenced by add_entry1().

static void add_entry1 ( TiffEncoderContext *  s,
enum TiffTags  tag,
enum TiffTypes  type,
int  val 
) [static]

Definition at line 140 of file tiffenc.c.

static int check_size ( TiffEncoderContext *  s,
uint64_t  need 
) [inline, static]

Check free space in buffer.

Parameters:
s Tiff context
need Needed bytes
Returns:
0 - ok, 1 - no free space

Definition at line 79 of file tiffenc.c.

Referenced by add_entry(), and encode_strip().

static int encode_frame ( AVCodecContext *  avctx,
unsigned char *  buf,
int  buf_size,
void *  data 
) [static]

according to CCIR Recommendation 601.1

Definition at line 205 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:
s Tiff context
src Input buffer
dst Output buffer
n Size of input buffer
compr Compression method
Returns:
Number of output bytes. If an output error is encountered, -1 returned

Definition at line 157 of file tiffenc.c.

static void pack_yuv ( TiffEncoderContext *  s,
uint8_t *  dst,
int  lnum 
) [static]

Definition at line 188 of file tiffenc.c.

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

Put n values to buffer.

Parameters:
p Pointer to pointer to output buffer
n Number of values
val Pointer to values
type Type of values
flip =0 - normal copy, >0 - flip

Definition at line 98 of file tiffenc.c.

Referenced by add_entry().

Variable Documentation

AVCodec ff_tiff_encoder

Initial value:

 {
    .name           = "tiff",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = CODEC_ID_TIFF,
    .priv_data_size = sizeof(TiffEncoderContext),
    .encode         = encode_frame,
    .pix_fmts =
        (const enum PixelFormat[]) {PIX_FMT_RGB24, PIX_FMT_PAL8, PIX_FMT_GRAY8,
                              PIX_FMT_MONOBLACK, PIX_FMT_MONOWHITE,
                              PIX_FMT_YUV420P, PIX_FMT_YUV422P,
                              PIX_FMT_YUV444P, PIX_FMT_YUV410P,
                              PIX_FMT_YUV411P, PIX_FMT_RGB48LE,
                              PIX_FMT_RGBA, PIX_FMT_NONE},
    .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
    .priv_class     = &tiffenc_class,
}

Definition at line 489 of file tiffenc.c.

const AVOption options[] [static]

Initial value:

 {
    {"dpi", "set the image resolution (in dpi)", OFFSET(dpi), AV_OPT_TYPE_INT, {.dbl = 72}, 1, 0x10000, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_ENCODING_PARAM},
    { "compression_algo", NULL, OFFSET(compr), AV_OPT_TYPE_INT, {TIFF_PACKBITS}, TIFF_RAW, TIFF_DEFLATE, VE, "compression_algo" },
    { "packbits", NULL, 0, AV_OPT_TYPE_CONST, {TIFF_PACKBITS}, 0, 0, VE, "compression_algo" },
    { "raw",      NULL, 0, AV_OPT_TYPE_CONST, {TIFF_RAW},      0, 0, VE, "compression_algo" },
    { "lzw",      NULL, 0, AV_OPT_TYPE_CONST, {TIFF_LZW},      0, 0, VE, "compression_algo" },



    { NULL },
}

Definition at line 470 of file tiffenc.c.

const AVClass tiffenc_class [static]

Initial value:

 {
    .class_name = "TIFF encoder",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 482 of file tiffenc.c.

const uint8_t type_sizes2[6] [static]

Initial value:

 {
    0, 1, 1, 2, 4, 8
}
sizes of various TIFF field types (string size = 1)

Definition at line 45 of file tiffenc.c.

Referenced by add_entry(), and tnput().

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