sgirledec.c File Reference

Silicon Graphics RLE 8-bit video decoder. More...

#include "libavutil/common.h"
#include "avcodec.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	SGIRLEContext

Macros
#define	RBG323_TO_BGR8(x)
	Convert SGI RBG323 pixel into AV_PIX_FMT_BGR8 SGI RGB data is packed as 8bpp, (msb)3R 2B 3G(lsb)
#define	INC_XY(n)

Functions
static av_cold int	sgirle_decode_init (AVCodecContext *avctx)
static av_always_inline void	rbg323_to_bgr8 (uint8_t *dst, const uint8_t *src, int size)
static int	decode_sgirle8 (AVCodecContext *avctx, uint8_t *dst, const uint8_t *src, int src_size, int width, int height, ptrdiff_t linesize)
static int	sgirle_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	sgirle_decode_end (AVCodecContext *avctx)

Variables
AVCodec	ff_sgirle_decoder

Detailed Description

Silicon Graphics RLE 8-bit video decoder.

Note

Data is packed in rbg323 with rle, contained in mv or mov. The algorithm and pixfmt are subtly different from SGI images.

Definition in file sgirledec.c.

Macro Definition Documentation

#define RBG323_TO_BGR8

(

x

)

Value:

((((x) << 3) & 0xC0) |                                \
                           (((x) << 3) & 0x38) |                                \
                           (((x) >> 5) & 7))

Convert SGI RBG323 pixel into AV_PIX_FMT_BGR8 SGI RGB data is packed as 8bpp, (msb)3R 2B 3G(lsb)

Definition at line 52 of file sgirledec.c.

Referenced by decode_sgirle8(), and rbg323_to_bgr8().

#define INC_XY

(

n

)

Value:

x += n;                                                                   \
    if (x >= width) {                                                         \
        y++;                                                                  \
        if (y >= height)                                                      \
            return 0;                                                         \
        x = 0;                                                                \
    }

Referenced by decode_sgirle8().

Function Documentation

static av_cold int sgirle_decode_init ( AVCodecContext *  avctx )

static

Definition at line 38 of file sgirledec.c.

static av_always_inline void rbg323_to_bgr8 ( uint8_t *  dst, const uint8_t *  src, int  size  )

static

Definition at line 56 of file sgirledec.c.

Referenced by decode_sgirle8().

static int decode_sgirle8 ( AVCodecContext *  avctx, uint8_t *  dst, const uint8_t *  src, int  src_size, int  width, int  height, ptrdiff_t  linesize  )

static

Parameters

[out]	dst	Destination buffer
[in]	src	Source buffer
	src_size	Source buffer size (bytes)
	width	Width of destination buffer (pixels)
	height	Height of destination buffer (pixels)
	linesize	Line size of destination buffer (bytes)

Returns

<0 on error

Definition at line 73 of file sgirledec.c.

Referenced by sgirle_decode_frame().

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

static

Definition at line 120 of file sgirledec.c.

static av_cold int sgirle_decode_end ( AVCodecContext *  avctx )

static

Definition at line 141 of file sgirledec.c.

Variable Documentation

AVCodec ff_sgirle_decoder

Initial value:

= {
    .name           = "sgirle",
    .long_name      = NULL_IF_CONFIG_SMALL("Silicon Graphics RLE 8-bit video"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_SGIRLE,
    .priv_data_size = sizeof(SGIRLEContext),
    .init           = sgirle_decode_init,
    .close          = sgirle_decode_end,
    .decode         = sgirle_decode_frame,
    .capabilities   = CODEC_CAP_DR1,
}

Definition at line 150 of file sgirledec.c.