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

Macros
#define	TIFF_MAX_ENTRY   32
#define	OFFSET(x)   offsetof(TiffEncoderContext, x)
#define	VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Typedefs
typedef struct TiffEncoderContext	TiffEncoderContext

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.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(TiffEncoderContext, x)

Definition at line 470 of file tiffenc.c.

#define TIFF_MAX_ENTRY   32

Definition at line 41 of file tiffenc.c.

Referenced by add_entry().

#define VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 471 of file tiffenc.c.

Typedef Documentation

typedef struct TiffEncoderContext TiffEncoderContext

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 115 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 138 of file tiffenc.c.

static int check_size ( TiffEncoderContext *  s, uint64_t  need  )

inlinestatic

Check free space in buffer.

Parameters

s	Tiff context
need	Needed bytes

Returns

0 - ok, 1 - no free space

Definition at line 77 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 203 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 155 of file tiffenc.c.

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

static

Definition at line 186 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 96 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_NONE},
    .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
    .priv_class     = &tiffenc_class,
}

Definition at line 490 of file tiffenc.c.

const AVOption options[]

static

Initial value:

 {
    { "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 472 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 483 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 44 of file tiffenc.c.

Referenced by add_entry(), and tnput().