gif.c File Reference

#include "avformat.h"
#include "internal.h"
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"

Go to the source code of this file.

Data Structures
struct	GIFContext

Macros
#define	DEFAULT_TRANSPARENCY_INDEX   0x1f
#define	OFFSET(x)   offsetof(GIFContext, x)
#define	ENC   AV_OPT_FLAG_ENCODING_PARAM

Functions
static int	get_palette_transparency_index (const uint32_t *palette)
static int	gif_image_write_header (AVIOContext *pb, AVStream *st, int loop_count, uint32_t *palette)
static int	gif_write_header (AVFormatContext *s)
static int	flush_packet (AVFormatContext *s, AVPacket *new)
static int	gif_write_packet (AVFormatContext *s, AVPacket *pkt)
static int	gif_write_trailer (AVFormatContext *s)

Variables
static const AVOption	options []
static const AVClass	gif_muxer_class
AVOutputFormat	ff_gif_muxer

Macro Definition Documentation

DEFAULT_TRANSPARENCY_INDEX

#define DEFAULT_TRANSPARENCY_INDEX   0x1f

Definition at line 33 of file gif.c.

Referenced by flush_packet(), and gif_image_write_header().

OFFSET

#define OFFSET

(

x

)

offsetof(GIFContext, x)

Definition at line 226 of file gif.c.

ENC

#define ENC   AV_OPT_FLAG_ENCODING_PARAM

Definition at line 227 of file gif.c.

Function Documentation

get_palette_transparency_index()

static int get_palette_transparency_index ( const uint32_t *  palette )

static

Definition at line 35 of file gif.c.

Referenced by flush_packet(), and gif_image_write_header().

gif_image_write_header()

static int gif_image_write_header ( AVIOContext *  pb, AVStream *  st, int  loop_count, uint32_t *  palette  )

static

Definition at line 53 of file gif.c.

Referenced by gif_write_header(), and gif_write_packet().

gif_write_header()

static int gif_write_header ( AVFormatContext *  s )

static

Definition at line 112 of file gif.c.

flush_packet()

static int flush_packet ( AVFormatContext *  s, AVPacket *  new  )

static

Definition at line 140 of file gif.c.

Referenced by gif_write_packet(), and gif_write_trailer().

gif_write_packet()

static int gif_write_packet ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 183 of file gif.c.

gif_write_trailer()

static int gif_write_trailer ( AVFormatContext *  s )

static

Definition at line 214 of file gif.c.

Variable Documentation

options

const AVOption options[]

static

Initial value:

= {
    { "loop", "Number of times to loop the output: -1 - no loop, 0 - infinite loop", OFFSET(loop),
      AV_OPT_TYPE_INT, { .i64 = 0 }, -1, 65535, ENC },
    { "final_delay", "Force delay (in centiseconds) after the last frame", OFFSET(last_delay),
      AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 65535, ENC },
    { NULL },
}

Definition at line 228 of file gif.c.

gif_muxer_class

const AVClass gif_muxer_class

static

Initial value:

= {
    .class_name = "GIF muxer",
    .item_name  = av_default_item_name,
    .version    = LIBAVUTIL_VERSION_INT,
    .option     = options,
}

Definition at line 236 of file gif.c.

ff_gif_muxer

AVOutputFormat ff_gif_muxer

Initial value:

= {
    .name           = "gif",
    .long_name      = NULL_IF_CONFIG_SMALL("GIF Animation"),
    .mime_type      = "image/gif",
    .extensions     = "gif",
    .priv_data_size = sizeof(GIFContext),
    .audio_codec    = AV_CODEC_ID_NONE,
    .video_codec    = AV_CODEC_ID_GIF,
    .write_header   = gif_write_header,
    .write_packet   = gif_write_packet,
    .write_trailer  = gif_write_trailer,
    .priv_class     = &gif_muxer_class,
    .flags          = AVFMT_VARIABLE_FPS,
}

Definition at line 243 of file gif.c.