gif.c File Reference

#include "avformat.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavcodec/put_bits.h"

Go to the source code of this file.

Data Structures
struct	rgb_triplet
struct	GIFContext

Macros
#define	BITSTREAM_WRITER_LE
#define	GIF_CHUNKS   100
#define	GIF_ADD_APP_HEADER
#define	OFFSET(x)   offsetof(GIFContext, x)
#define	ENC   AV_OPT_FLAG_ENCODING_PARAM

Functions
static int	gif_image_write_header (AVIOContext *pb, int width, int height, int loop_count, uint32_t *palette)
static unsigned char	gif_clut_index (uint8_t r, uint8_t g, uint8_t b)
static int	gif_image_write_image (AVIOContext *pb, int x1, int y1, int width, int height, const uint8_t *buf, int linesize, int pix_fmt)
static int	gif_write_header (AVFormatContext *s)
static int	gif_write_video (AVFormatContext *s, AVCodecContext *enc, const uint8_t *buf, int size)
static int	gif_write_packet (AVFormatContext *s, AVPacket *pkt)
static int	gif_write_trailer (AVFormatContext *s)

Variables
static const rgb_triplet	gif_clut [216]
static const AVOption	options []
static const AVClass	gif_muxer_class
AVOutputFormat	ff_gif_muxer

Macro Definition Documentation

#define BITSTREAM_WRITER_LE

Definition at line 48 of file gif.c.

#define GIF_CHUNKS   100

Definition at line 53 of file gif.c.

Referenced by gif_image_write_image().

#define GIF_ADD_APP_HEADER

Definition at line 59 of file gif.c.

#define OFFSET

(

x

)

offsetof(GIFContext, x)

Definition at line 354 of file gif.c.

#define ENC   AV_OPT_FLAG_ENCODING_PARAM

Definition at line 355 of file gif.c.

Function Documentation

static int gif_image_write_header ( AVIOContext *  pb, int  width, int  height, int  loop_count, uint32_t *  palette  )

static

Definition at line 121 of file gif.c.

Referenced by gif_write_header().

static unsigned char gif_clut_index ( uint8_t  r, uint8_t  g, uint8_t  b  )

inlinestatic

Definition at line 187 of file gif.c.

Referenced by gif_image_write_image().

static int gif_image_write_image ( AVIOContext *  pb, int  x1, int  y1, int  width, int  height, const uint8_t *  buf, int  linesize, int  pix_fmt  )

static

Definition at line 192 of file gif.c.

Referenced by gif_write_video().

static int gif_write_header ( AVFormatContext *  s )

static

Definition at line 263 of file gif.c.

static int gif_write_video ( AVFormatContext *  s, AVCodecContext *  enc, const uint8_t *  buf, int  size  )

static

Definition at line 305 of file gif.c.

Referenced by gif_write_packet().

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

static

Definition at line 336 of file gif.c.

static int gif_write_trailer ( AVFormatContext *  s )

static

Definition at line 345 of file gif.c.

Variable Documentation

const rgb_triplet gif_clut[216]

static

Definition at line 81 of file gif.c.

const AVOption options[]

static

Initial value:

= {
    { "loop", "Number of times to loop the output.", OFFSET(loop),
      AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 65535, ENC },
    { NULL },
}

Definition at line 356 of file gif.c.

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 362 of file gif.c.

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_RAWVIDEO,
    .write_header   = gif_write_header,
    .write_packet   = gif_write_packet,
    .write_trailer  = gif_write_trailer,
    .priv_class     = &gif_muxer_class,
}

Definition at line 369 of file gif.c.