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

(

x

)

offsetof(TiffEncoderContext, x)

Definition at line 511 of file tiffenc.c.

#define VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 512 of file tiffenc.c.

Function Documentation

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 88 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

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 107 of file tiffenc.c.

Referenced by add_entry().

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 127 of file tiffenc.c.

Referenced by add_entry1(), and encode_frame().

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

static

Definition at line 149 of file tiffenc.c.

Referenced by encode_frame().

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 is returned

Definition at line 167 of file tiffenc.c.

Referenced by encode_frame().

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

static

Definition at line 198 of file tiffenc.c.

Referenced by encode_frame().

static av_cold int encode_init ( AVCodecContext *  avctx )

static

Definition at line 226 of file tiffenc.c.

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

static

according to CCIR Recommendation 601.1

Definition at line 238 of file tiffenc.c.

static av_cold int encode_close ( AVCodecContext *  avctx )

static

Definition at line 500 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 513 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 525 of file tiffenc.c.

AVCodec ff_tiff_encoder

Initial value:

= {
    .name           = "tiff",
    .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_TIFF,
    .priv_data_size = sizeof(TiffEncoderContext),
    .init           = encode_init,
    .encode2        = encode_frame,
    .close          = encode_close,
    .pix_fmts       = (const enum AVPixelFormat[]) {
        AV_PIX_FMT_RGB24, AV_PIX_FMT_PAL8, AV_PIX_FMT_GRAY8,
        AV_PIX_FMT_GRAY8A, AV_PIX_FMT_GRAY16LE,
        AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_MONOWHITE,
        AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
        AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_RGB48LE,
        AV_PIX_FMT_RGBA, AV_PIX_FMT_RGBA64LE,
        AV_PIX_FMT_NONE
    },
    .priv_class     = &tiffenc_class,
}

Definition at line 532 of file tiffenc.c.