libavcodec/sgidec.c File Reference

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

Go to the source code of this file.

Data Structures
struct	SgiState
Functions
static int	expand_rle_row (const uint8_t *in_buf, const uint8_t *in_end, unsigned char *out_buf, uint8_t *out_end, int pixelstride)
	Expand an RLE row into a channel.
static int	read_rle_sgi (unsigned char *out_buf, const uint8_t *in_buf, const uint8_t *in_end, SgiState *s)
	Read a run length encoded SGI image.
static int	read_uncompressed_sgi (unsigned char *out_buf, uint8_t *out_end, const uint8_t *in_buf, const uint8_t *in_end, SgiState *s)
	Read an uncompressed SGI image.
static int	decode_frame (AVCodecContext *avctx, void *data, int *data_size, 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 decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		AVPacket *	avpkt
	)			[static]

Definition at line 151 of file sgidec.c.

static int expand_rle_row	(	const uint8_t *	in_buf,
		const uint8_t *	in_end,
		unsigned char *	out_buf,
		uint8_t *	out_end,
		int	pixelstride
	)			[static]

Expand an RLE row into a channel.

Parameters:

	in_buf	input buffer
	in_end	end of input buffer
	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 45 of file sgidec.c.

Referenced by read_rle_sgi().

static int read_rle_sgi	(	unsigned char *	out_buf,
		const uint8_t *	in_buf,
		const uint8_t *	in_end,
		SgiState *	s
	)			[static]

Read a run length encoded SGI image.

Parameters:

	out_buf	output buffer
	in_buf	input buffer
	in_end	end of input buffer
	s	the current image state

Returns:

0 if no error, else return error number.

Definition at line 85 of file sgidec.c.

Referenced by decode_frame().

static int read_uncompressed_sgi	(	unsigned char *	out_buf,
		uint8_t *	out_end,
		const uint8_t *	in_buf,
		const uint8_t *	in_end,
		SgiState *	s
	)			[static]

Read an uncompressed SGI image.

Parameters:

	out_buf	output buffer
	out_end	end ofoutput buffer
	in_buf	input buffer
	in_end	end of input buffer
	s	the current image state

Returns:

0 if read success, otherwise return -1.

Definition at line 125 of file sgidec.c.

Referenced by decode_frame().

static av_cold int sgi_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 252 of file sgidec.c.

static av_cold int sgi_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 243 of file sgidec.c.

---

Variable Documentation

AVCodec ff_sgi_decoder

Initial value:

 {
    "sgi",
    AVMEDIA_TYPE_VIDEO,
    CODEC_ID_SGI,
    sizeof(SgiState),
    sgi_init,
    NULL,
    sgi_end,
    decode_frame,
    .long_name = NULL_IF_CONFIG_SMALL("SGI image"),
}

Definition at line 262 of file sgidec.c.