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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
 
AVCodec ff_gif_decoder
 

Macro Definition Documentation

#define GIF_TRANSPARENT_COLOR   0x00ffffff

Definition at line 36 of file gifdec.c.

Function Documentation

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().

static void gif_fill ( AVFrame *  picture,
uint32_t  color 
)
static

Definition at line 87 of file gifdec.c.

Referenced by gif_read_image().

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().

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().

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

Definition at line 130 of file gifdec.c.

Referenced by gif_parse_next_image().

static int gif_read_extension ( GifState *  s)
static

Definition at line 307 of file gifdec.c.

Referenced by gif_parse_next_image().

static int gif_read_header1 ( GifState *  s)
static

Definition at line 368 of file gifdec.c.

Referenced by gif_decode_frame().

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

Definition at line 417 of file gifdec.c.

Referenced by gif_decode_frame().

static av_cold int gif_decode_init ( AVCodecContext *  avctx)
static

Definition at line 443 of file gifdec.c.

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

Definition at line 457 of file gifdec.c.

static av_cold int gif_decode_close ( AVCodecContext *  avctx)
static

Definition at line 520 of file gifdec.c.

Variable Documentation

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 },
}
NULL
#define NULL
Definition: coverity.c:32
AV_OPT_TYPE_INT
Definition: opt.h:223
GIF_TRANSPARENT_COLOR
#define GIF_TRANSPARENT_COLOR
Definition: gifdec.c:36
AV_OPT_FLAG_VIDEO_PARAM
#define AV_OPT_FLAG_VIDEO_PARAM
Definition: opt.h:281
AV_OPT_FLAG_DECODING_PARAM
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:276

Definition at line 532 of file gifdec.c.

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,
}
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
av_default_item_name
av_default_item_name
Definition: libopenh264enc.c:68
options
static const AVOption options[]
Definition: gifdec.c:532

Definition at line 540 of file gifdec.c.

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,
.priv_class = &decoder_class,
}
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
gif_decode_frame
static int gif_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: gifdec.c:457
gif_decode_close
static av_cold int gif_decode_close(AVCodecContext *avctx)
Definition: gifdec.c:520
decode
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:722
gif_decode_init
static av_cold int gif_decode_init(AVCodecContext *avctx)
Definition: gifdec.c:443
decoder_class
static const AVClass decoder_class
Definition: gifdec.c:540
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:193
AV_CODEC_ID_GIF
Definition: avcodec.h:292
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:956

Definition at line 548 of file gifdec.c.

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