gifdec.c File Reference

#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
#include "lzw.h"
#include "gif.h"

Go to the source code of this file.

Data Structures
struct	GifState

Macros
#define	GIF_TRANSPARENT_COLOR   0x00ffffff

Functions
static void	gif_read_palette (GifState *s, uint32_t *pal, int nb)
static void	gif_fill (AVFrame *picture, uint32_t color)
static void	gif_fill_rect (AVFrame *picture, uint32_t color, int l, int t, int w, int h)
static void	gif_copy_img_rect (const uint32_t *src, uint32_t *dst, int linesize, int l, int t, int w, int h)
static int	gif_read_image (GifState *s, AVFrame *frame)
static int	gif_read_extension (GifState *s)
static int	gif_read_header1 (GifState *s)
static int	gif_parse_next_image (GifState *s, AVFrame *frame)
static av_cold int	gif_decode_init (AVCodecContext *avctx)
static int	gif_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	gif_decode_close (AVCodecContext *avctx)

Variables
static const AVOption	options []
static const AVClass	decoder_class
const AVCodec	ff_gif_decoder

Macro Definition Documentation

GIF_TRANSPARENT_COLOR

#define GIF_TRANSPARENT_COLOR   0x00ffffff

Definition at line 36 of file gifdec.c.

Function Documentation

gif_read_palette()

static void gif_read_palette ( GifState *  s, uint32_t *  pal, int  nb  )

static

Definition at line 79 of file gifdec.c.

Referenced by gif_read_header1(), and gif_read_image().

gif_fill()

static void gif_fill ( AVFrame *  picture, uint32_t  color  )

static

Definition at line 87 of file gifdec.c.

Referenced by gif_read_image().

gif_fill_rect()

static void gif_fill_rect ( AVFrame *  picture, uint32_t  color, int  l, int  t, int  w, int  h  )

static

Definition at line 96 of file gifdec.c.

Referenced by gif_read_image().

gif_copy_img_rect()

static void gif_copy_img_rect ( const uint32_t *  src, uint32_t *  dst, int  linesize, int  l, int  t, int  w, int  h  )

static

Definition at line 112 of file gifdec.c.

Referenced by gif_read_image().

gif_read_image()

static int gif_read_image ( GifState *  s, AVFrame *  frame  )

static

Definition at line 130 of file gifdec.c.

Referenced by gif_parse_next_image().

gif_read_extension()

static int gif_read_extension ( GifState *  s )

static

Definition at line 315 of file gifdec.c.

Referenced by gif_parse_next_image().

gif_read_header1()

static int gif_read_header1 ( GifState *  s )

static

Definition at line 376 of file gifdec.c.

Referenced by gif_decode_frame().

gif_parse_next_image()

static int gif_parse_next_image ( GifState *  s, AVFrame *  frame  )

static

Definition at line 425 of file gifdec.c.

Referenced by gif_decode_frame().

gif_decode_init()

static av_cold int gif_decode_init ( AVCodecContext *  avctx )

static

Definition at line 451 of file gifdec.c.

gif_decode_frame()

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

static

Definition at line 467 of file gifdec.c.

gif_decode_close()

static av_cold int gif_decode_close ( AVCodecContext *  avctx )

static

Definition at line 529 of file gifdec.c.

Variable Documentation

options

const AVOption options[]

static

Initial value:

= {
    { "trans_color", "color value (ARGB) that is used instead of transparent color",
      0x42, AV_OPT_TYPE_INT,
      {.i64 = GIF_TRANSPARENT_COLOR}, 0, 0xffffffff,
      AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_VIDEO_PARAM },
    { NULL },
}

Definition at line 541 of file gifdec.c.

decoder_class

const AVClass decoder_class

static

Initial value:

= {
    .class_name = "gif decoder",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
    .category   = AV_CLASS_CATEGORY_DECODER,
}

Definition at line 549 of file gifdec.c.

ff_gif_decoder

const AVCodec ff_gif_decoder

Initial value:

= {
    .name           = "gif",
    .long_name      = NULL_IF_CONFIG_SMALL("GIF (Graphics Interchange Format)"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_GIF,
    .priv_data_size = sizeof(GifState),
    .init           = gif_decode_init,
    .close          = gif_decode_close,
    .decode         = gif_decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |
                      FF_CODEC_CAP_INIT_CLEANUP,
    .priv_class     = &decoder_class,
}

Definition at line 557 of file gifdec.c.