sgidec.c File Reference

#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"
#include "sgi.h"

Go to the source code of this file.

Macros
#define	MAP(in_idx, out_idx)

Functions
static int	expand_rle_row8 (void *logctx, uint8_t *out_buf, GetByteContext *g, unsigned width)
	Expand an RLE row into a channel. More...
static int	expand_rle_row16 (void *logctx, uint16_t *out_buf, GetByteContext *g, unsigned width)
static int	read_rle_sgi (void *logctx, uint8_t *out[4], ptrdiff_t stride[4], GetByteContext *g, unsigned width, int height, unsigned nb_components, unsigned bytes_per_channel)
	Read a run length encoded SGI image. More...
static int	read_uncompressed_sgi (uint8_t *const out[4], const ptrdiff_t stride[4], GetByteContext *g, unsigned width, int height, unsigned nb_components, unsigned bytes_per_channel)
	Read an uncompressed SGI image. More...
static int	decode_frame (AVCodecContext *avctx, AVFrame *p, int *got_frame, AVPacket *avpkt)

Variables
const FFCodec	ff_sgi_decoder

Macro Definition Documentation

MAP

#define MAP	(		in_idx,
			out_idx
	)

Value:

    out[(in_idx)]      = p->data[(out_idx)]; \
    linesize[(in_idx)] = p->linesize[(out_idx)]

Function Documentation

expand_rle_row8()

static int expand_rle_row8 ( void *  logctx, uint8_t *  out_buf, GetByteContext *  g, unsigned  width  )

static

Expand an RLE row into a channel.

Parameters

logctx	a logcontext
out_buf	Points to one line after the output buffer.
g	GetByteContext used to read input from
width	length of out_buf in nb of elements

Returns

nb of elements written, else return error code.

Definition at line 36 of file sgidec.c.

Referenced by read_rle_sgi().

expand_rle_row16()

static int expand_rle_row16 ( void *  logctx, uint16_t *  out_buf, GetByteContext *  g, unsigned  width  )

static

Definition at line 70 of file sgidec.c.

Referenced by read_rle_sgi().

read_rle_sgi()

static int read_rle_sgi ( void *  logctx, uint8_t *  out[4], ptrdiff_t  stride[4], GetByteContext *  g, unsigned  width, int  height, unsigned  nb_components, unsigned  bytes_per_channel  )

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 code.

Definition at line 116 of file sgidec.c.

Referenced by decode_frame().

read_uncompressed_sgi()

static int read_uncompressed_sgi ( uint8_t *const  out[4], const ptrdiff_t  stride[4], GetByteContext *  g, unsigned  width, int  height, unsigned  nb_components, unsigned  bytes_per_channel  )

static

Read an uncompressed SGI image.

Parameters

out_buf	output buffer
s	the current image state

Returns

0 if read success, else return error code.

Definition at line 155 of file sgidec.c.

Referenced by decode_frame().

decode_frame()

static int decode_frame ( AVCodecContext *  avctx, AVFrame *  p, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 177 of file sgidec.c.

Variable Documentation

ff_sgi_decoder

const FFCodec ff_sgi_decoder

Initial value:

= {
    .p.name         = "sgi",
    CODEC_LONG_NAME("SGI image"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_SGI,
    FF_CODEC_DECODE_CB(decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
}

Definition at line 270 of file sgidec.c.