tiff.c File Reference

TIFF image decoder. More...

#include "config.h"
#include "libavutil/attributes.h"
#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "bytestream.h"
#include "faxcompr.h"
#include "internal.h"
#include "lzw.h"
#include "mathops.h"
#include "tiff.h"
#include "tiff_data.h"
#include "thread.h"

Go to the source code of this file.

Data Structures
struct	TiffContext

Macros
#define	RET_GEOKEY(TYPE, array, element)
#define	RET_GEOKEY_VAL(TYPE, array)
#define	ADD_METADATA(count, name, sep)

Functions
static void	free_geotags (TiffContext *const s)
static const char *	get_geokey_name (int key)
static int	get_geokey_type (int key)
static int	cmp_id_key (const void *id, const void *k)
static const char *	search_keyval (const TiffGeoTagKeyName *keys, int n, int id)
static char *	get_geokey_val (int key, int val)
static char *	doubles2str (double *dp, int count, const char *sep)
static int	add_metadata (int count, int type, const char *name, const char *sep, TiffContext *s, AVFrame *frame)
static void av_always_inline	horizontal_fill (unsigned int bpp, uint8_t *dst, int usePtr, const uint8_t *src, uint8_t c, int width, int offset)
static int	deinvert_buffer (TiffContext *s, const uint8_t *src, int size)
static void	unpack_yuv (TiffContext *s, AVFrame *p, const uint8_t *src, int lnum)
static int	tiff_unpack_fax (TiffContext *s, uint8_t *dst, int stride, const uint8_t *src, int size, int width, int lines)
static int	tiff_unpack_strip (TiffContext *s, AVFrame *p, uint8_t *dst, int stride, const uint8_t *src, int size, int strip_start, int lines)
static int	init_image (TiffContext *s, ThreadFrame *frame)
static void	set_sar (TiffContext *s, unsigned tag, unsigned num, unsigned den)
static int	tiff_decode_tag (TiffContext *s, AVFrame *frame)
static int	decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	tiff_init (AVCodecContext *avctx)
static av_cold int	tiff_end (AVCodecContext *avctx)

Variables
AVCodec	ff_tiff_decoder

Detailed Description

TIFF image decoder.

Author

Konstantin Shishkov

Definition in file tiff.c.

Macro Definition Documentation

RET_GEOKEY

#define RET_GEOKEY	(		TYPE,
			array,
			element
	)

Value:

if (key >= TIFF_##TYPE##_KEY_ID_OFFSET &&\
        key - TIFF_##TYPE##_KEY_ID_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_name_type_map))\
        return ff_tiff_##array##_name_type_map[key - TIFF_##TYPE##_KEY_ID_OFFSET].element;

Definition at line 95 of file tiff.c.

Referenced by get_geokey_name(), and get_geokey_type().

RET_GEOKEY_VAL

#define RET_GEOKEY_VAL	(		TYPE,
			array
	)

Value:

if (val >= TIFF_##TYPE##_OFFSET &&\
        val - TIFF_##TYPE##_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_codes))\
        return av_strdup(ff_tiff_##array##_codes[val - TIFF_##TYPE##_OFFSET]);

Referenced by get_geokey_val().

ADD_METADATA

#define ADD_METADATA	(		count,
			name,
			sep
	)

Value:

if ((ret = add_metadata(count, type, name, sep, s, frame)) < 0) {\
        av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");\
        goto end;\
    }

Referenced by tiff_decode_tag().

Function Documentation

free_geotags()

static void free_geotags ( TiffContext *const  s )

static

Definition at line 84 of file tiff.c.

Referenced by decode_frame(), and tiff_end().

get_geokey_name()

static const char* get_geokey_name ( int  key )

static

Definition at line 100 of file tiff.c.

Referenced by decode_frame().

get_geokey_type()

static int get_geokey_type ( int  key )

static

Definition at line 110 of file tiff.c.

Referenced by decode_frame().

cmp_id_key()

static int cmp_id_key ( const void *  id, const void *  k  )

static

Definition at line 120 of file tiff.c.

Referenced by search_keyval().

search_keyval()

static const char* search_keyval ( const TiffGeoTagKeyName *  keys, int  n, int  id  )

static

Definition at line 125 of file tiff.c.

Referenced by get_geokey_val().

get_geokey_val()

static char* get_geokey_val ( int  key, int  val  )

static

Definition at line 134 of file tiff.c.

Referenced by tiff_decode_tag().

doubles2str()

static char* doubles2str ( double *  dp, int  count, const char *  sep  )

static

Definition at line 202 of file tiff.c.

Referenced by tiff_decode_tag().

add_metadata()

static int add_metadata ( int  count, int  type, const char *  name, const char *  sep, TiffContext *  s, AVFrame *  frame  )

static

Definition at line 228 of file tiff.c.

horizontal_fill()

static void av_always_inline horizontal_fill ( unsigned int  bpp, uint8_t *  dst, int  usePtr, const uint8_t *  src, uint8_t  c, int  width, int  offset  )

static

Definition at line 239 of file tiff.c.

Referenced by tiff_unpack_fax(), tiff_unpack_strip(), and unpack_yuv().

deinvert_buffer()

static int deinvert_buffer ( TiffContext *  s, const uint8_t *  src, int  size  )

static

Definition at line 279 of file tiff.c.

Referenced by tiff_unpack_strip(), and unpack_yuv().

unpack_yuv()

static void unpack_yuv ( TiffContext *  s, AVFrame *  p, const uint8_t *  src, int  lnum  )

static

Definition at line 292 of file tiff.c.

Referenced by tiff_unpack_strip().

tiff_unpack_fax()

static int tiff_unpack_fax ( TiffContext *  s, uint8_t *  dst, int  stride, const uint8_t *  src, int  size, int  width, int  lines  )

static

Definition at line 452 of file tiff.c.

Referenced by tiff_unpack_strip().

tiff_unpack_strip()

static int tiff_unpack_strip ( TiffContext *  s, AVFrame *  p, uint8_t *  dst, int  stride, const uint8_t *  src, int  size, int  strip_start, int  lines  )

static

Definition at line 485 of file tiff.c.

Referenced by decode_frame().

init_image()

static int init_image ( TiffContext *  s, ThreadFrame *  frame  )

static

Definition at line 655 of file tiff.c.

Referenced by decode_frame().

set_sar()

static void set_sar ( TiffContext *  s, unsigned  tag, unsigned  num, unsigned  den  )

static

Definition at line 773 of file tiff.c.

Referenced by tiff_decode_tag().

tiff_decode_tag()

static int tiff_decode_tag ( TiffContext *  s, AVFrame *  frame  )

static

Definition at line 792 of file tiff.c.

Referenced by decode_frame().

decode_frame()

static int decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 1212 of file tiff.c.

tiff_init()

static av_cold int tiff_init ( AVCodecContext *  avctx )

static

Definition at line 1396 of file tiff.c.

tiff_end()

static av_cold int tiff_end ( AVCodecContext *  avctx )

static

Definition at line 1411 of file tiff.c.

Variable Documentation

ff_tiff_decoder

AVCodec ff_tiff_decoder

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(TiffContext),
    .init           = tiff_init,
    .close          = tiff_end,
    .decode         = decode_frame,
    .init_thread_copy = ONLY_IF_THREADS_ENABLED(tiff_init),
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
}

Definition at line 1425 of file tiff.c.