sgidec.c File Reference

#include "libavutil/imgutils.h"
#include "libavutil/avassert.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
#include "sgi.h"

Go to the source code of this file.

Data Structures
struct	SgiState

Functions
static int	expand_rle_row (SgiState *s, uint8_t *out_buf, uint8_t *out_end, int pixelstride)
	Expand an RLE row into a channel.
static int	read_rle_sgi (uint8_t *out_buf, SgiState *s)
	Read a run length encoded SGI image.
static int	read_uncompressed_sgi (unsigned char *out_buf, SgiState *s)
	Read an uncompressed SGI image.
static int	decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	sgi_init (AVCodecContext *avctx)
static av_cold int	sgi_end (AVCodecContext *avctx)

Variables
AVCodec	ff_sgi_decoder

Function Documentation

static int expand_rle_row ( SgiState *  s, uint8_t *  out_buf, uint8_t *  out_end, int  pixelstride  )

static

Expand an RLE row into a channel.

Parameters

s	the current image state
out_buf	Points to one line after the output buffer.
out_end	end of line in output buffer
pixelstride	pixel stride of input buffer

Returns

size of output in bytes, -1 if buffer overflows

Definition at line 47 of file sgidec.c.

Referenced by read_rle_sgi().

static int read_rle_sgi ( uint8_t *  out_buf, SgiState *  s  )

static

Read a run length encoded SGI image.

Parameters

out_buf	output buffer
s	the current image state

Returns

0 if no error, else return error number.

Definition at line 87 of file sgidec.c.

Referenced by decode_frame().

static int read_uncompressed_sgi ( unsigned char *  out_buf, SgiState *  s  )

static

Read an uncompressed SGI image.

Parameters

out_buf	output buffer
s	the current image state

Returns

0 if read success, otherwise return -1.

Definition at line 121 of file sgidec.c.

Referenced by decode_frame().

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

static

Definition at line 154 of file sgidec.c.

static av_cold int sgi_init ( AVCodecContext *  avctx )

static

Definition at line 244 of file sgidec.c.

static av_cold int sgi_end ( AVCodecContext *  avctx )

static

Definition at line 253 of file sgidec.c.

Variable Documentation

AVCodec ff_sgi_decoder

Initial value:

= {
    .name           = "sgi",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_SGI,
    .priv_data_size = sizeof(SgiState),
    .init           = sgi_init,
    .close          = sgi_end,
    .decode         = decode_frame,
    .long_name      = NULL_IF_CONFIG_SMALL("SGI image"),
    .capabilities   = CODEC_CAP_DR1,
}

Definition at line 263 of file sgidec.c.