libavcodec/tiffenc.c File Reference

TIFF image encoder. More...

#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
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)
AVCodec	tiff_encoder

---

Detailed Description

TIFF image encoder.

Author:

Bartlomiej Wolowiec

Definition in file tiffenc.c.

---

Define Documentation

#define TIFF_MAX_ENTRY   32

Definition at line 37 of file tiffenc.c.

Referenced by add_entry().

---

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 110 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 133 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 72 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 198 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 150 of file tiffenc.c.

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

Definition at line 181 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 91 of file tiffenc.c.

Referenced by add_entry().

---

Variable Documentation

AVCodec tiff_encoder

Initial value:

 {
    "tiff",
    AVMEDIA_TYPE_VIDEO,
    CODEC_ID_TIFF,
    sizeof(TiffEncoderContext),
    NULL,
    encode_frame,
    NULL,
    NULL,
    0,
    NULL,
    .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"),
}

Definition at line 445 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 40 of file tiffenc.c.

Referenced by add_entry(), and tnput().