#include "libavutil/avassert.h"
#include "avcodec.h"
#include "bytestream.h"
#include "copy_block.h"
#include "codec_internal.h"
#include "decode.h"

Go to the source code of this file.

Data Structures
struct	SANMVideoContext

struct	SANMFrameHeader

Macros
#define	NGLYPHS 256

#define	GLYPH_COORD_VECT_SIZE 16

#define	PALETTE_SIZE 256

#define	PALETTE_DELTA 768

Typedefs
typedef int(*	frm_decoder) (SANMVideoContext *ctx)

Enumerations
enum	GlyphEdge { LEFT_EDGE, TOP_EDGE, RIGHT_EDGE, BOTTOM_EDGE, NO_EDGE }

enum	GlyphDir { DIR_LEFT, DIR_UP, DIR_RIGHT, DIR_DOWN, NO_DIR }

Functions
static enum GlyphEdge	which_edge (int x, int y, int edge_size)
	Return enum GlyphEdge of box where point (x, y) lies. More...

static enum GlyphDir	which_direction (enum GlyphEdge edge0, enum GlyphEdge edge1)

static void	interp_point (int8_t *points, int x0, int y0, int x1, int y1, int pos, int npoints)

static void	make_glyphs (int8_t pglyphs, const int8_t xvec, const int8_t *yvec, const int side_length)
	Construct glyphs by iterating through vector coordinates. More...

static void	init_sizes (SANMVideoContext *ctx, int width, int height)

static void	destroy_buffers (SANMVideoContext *ctx)

static av_cold int	init_buffers (SANMVideoContext *ctx)

static void	rotate_bufs (SANMVideoContext *ctx, int rotate_code)

static av_cold int	decode_init (AVCodecContext *avctx)

static av_cold int	decode_end (AVCodecContext *avctx)

static int	rle_decode (SANMVideoContext ctx, uint8_t dst, const int out_size)

static int	old_codec1 (SANMVideoContext *ctx, int top, int left, int width, int height)

static void	codec37_mv (uint8_t dst, const uint8_t src, int height, int stride, int x, int y)

static int	old_codec37 (SANMVideoContext *ctx, int top, int left, int width, int height)

static int	process_block (SANMVideoContext ctx, uint8_t dst, uint8_t prev1, uint8_t prev2, int stride, int tbl, int size)

static int	old_codec47 (SANMVideoContext *ctx, int top, int left, int width, int height)

static int	process_frame_obj (SANMVideoContext *ctx)

static int	decode_0 (SANMVideoContext *ctx)

static int	decode_nop (SANMVideoContext *ctx)

static void	copy_block (uint16_t pdest, uint16_t psrc, int block_size, ptrdiff_t pitch)

static void	fill_block (uint16_t *pdest, uint16_t color, int block_size, ptrdiff_t pitch)

static int	draw_glyph (SANMVideoContext ctx, uint16_t dst, int index, uint16_t fg_color, uint16_t bg_color, int block_size, ptrdiff_t pitch)

static int	opcode_0xf7 (SANMVideoContext *ctx, int cx, int cy, int block_size, ptrdiff_t pitch)

static int	opcode_0xf8 (SANMVideoContext *ctx, int cx, int cy, int block_size, ptrdiff_t pitch)

static int	good_mvec (SANMVideoContext *ctx, int cx, int cy, int mx, int my, int block_size)

static int	codec2subblock (SANMVideoContext *ctx, int cx, int cy, int blk_size)

static int	decode_2 (SANMVideoContext *ctx)

static int	decode_3 (SANMVideoContext *ctx)

static int	decode_4 (SANMVideoContext *ctx)

static int	decode_5 (SANMVideoContext *ctx)

static int	decode_6 (SANMVideoContext *ctx)

static int	decode_8 (SANMVideoContext *ctx)

static int	read_frame_header (SANMVideoContext ctx, SANMFrameHeader hdr)

static void	fill_frame (uint16_t *pbuf, int buf_size, uint16_t color)

static int	copy_output (SANMVideoContext ctx, SANMFrameHeader hdr)

static int	decode_frame (AVCodecContext avctx, AVFrame frame, int got_frame_ptr, AVPacket pkt)

Variables
static const int8_t	glyph4_x [GLYPH_COORD_VECT_SIZE]

static const int8_t	glyph4_y [GLYPH_COORD_VECT_SIZE]

static const int8_t	glyph8_x [GLYPH_COORD_VECT_SIZE]

static const int8_t	glyph8_y [GLYPH_COORD_VECT_SIZE]

static const int8_t	motion_vectors [256][2]

static const int8_t	c37_mv []

static const frm_decoder	v1_decoders []

const FFCodec	ff_sanm_decoder

Macro Definition Documentation

◆ NGLYPHS

#define NGLYPHS 256

Definition at line 31 of file sanm.c.

◆ GLYPH_COORD_VECT_SIZE

#define GLYPH_COORD_VECT_SIZE 16

Definition at line 32 of file sanm.c.

◆ PALETTE_SIZE

#define PALETTE_SIZE 256

Definition at line 33 of file sanm.c.

◆ PALETTE_DELTA

#define PALETTE_DELTA 768

Definition at line 34 of file sanm.c.

Typedef Documentation

◆ frm_decoder

typedef int(* frm_decoder) (SANMVideoContext *ctx)

Definition at line 1311 of file sanm.c.

Enumeration Type Documentation

◆ GlyphEdge

enum GlyphEdge

Enumerator
LEFT_EDGE
TOP_EDGE
RIGHT_EDGE
BOTTOM_EDGE
NO_EDGE

Definition at line 302 of file sanm.c.

◆ GlyphDir

enum GlyphDir

Enumerator
DIR_LEFT
DIR_UP
DIR_RIGHT
DIR_DOWN
NO_DIR

Definition at line 310 of file sanm.c.

Function Documentation

◆ which_edge()

static enum GlyphEdge which_edge	(	int	x,
		int	y,
		int	edge_size
	)

static

Return enum GlyphEdge of box where point (x, y) lies.

Parameters

x	x point coordinate
y	y point coordinate
edge_size	box width/height.

Definition at line 325 of file sanm.c.

Referenced by make_glyphs().

◆ which_direction()

static enum GlyphDir which_direction	(	enum GlyphEdge	edge0,
		enum GlyphEdge	edge1
	)

static

Definition at line 341 of file sanm.c.

Referenced by make_glyphs().

◆ interp_point()

static void interp_point	(	int8_t *	points,
		int	x0,
		int	y0,
		int	x1,
		int	y1,
		int	pos,
		int	npoints
	)

static

Definition at line 364 of file sanm.c.

Referenced by make_glyphs().

◆ make_glyphs()

static void make_glyphs	(	int8_t *	pglyphs,
		const int8_t *	xvec,
		const int8_t *	yvec,
		const int	side_length
	)

static

Construct glyphs by iterating through vector coordinates.

Parameters

pglyphs	pointer to table where glyphs are stored
xvec	pointer to x component of vector coordinates
yvec	pointer to y component of vector coordinates
side_length	glyph width/height.

Definition at line 384 of file sanm.c.

Referenced by decode_init().

◆ init_sizes()

static void init_sizes	(	SANMVideoContext *	ctx,
		int	width,
		int	height
	)

static

Definition at line 436 of file sanm.c.

Referenced by decode_init(), destroy_buffers(), and process_frame_obj().

◆ destroy_buffers()

static void destroy_buffers ( SANMVideoContext * ctx )

static

Definition at line 449 of file sanm.c.

Referenced by decode_end(), and init_buffers().

◆ init_buffers()

static av_cold int init_buffers ( SANMVideoContext * ctx )

static

Definition at line 462 of file sanm.c.

Referenced by decode_init(), and process_frame_obj().

◆ rotate_bufs()

static void rotate_bufs	(	SANMVideoContext *	ctx,
		int	rotate_code
	)

static

Definition at line 480 of file sanm.c.

Referenced by decode_frame(), and old_codec37().

◆ decode_init()

static av_cold int decode_init ( AVCodecContext * avctx )

static

Definition at line 487 of file sanm.c.

◆ decode_end()

static av_cold int decode_end ( AVCodecContext * avctx )

static

Definition at line 521 of file sanm.c.

◆ rle_decode()

static int rle_decode	(	SANMVideoContext *	ctx,
		uint8_t *	dst,
		const int	out_size
	)

static

Definition at line 530 of file sanm.c.

Referenced by decode_5(), decode_8(), old_codec37(), and old_codec47().

◆ old_codec1()

static int old_codec1	(	SANMVideoContext *	ctx,
		int	top,
		int	left,
		int	width,
		int	height
	)

static

Definition at line 556 of file sanm.c.

Referenced by process_frame_obj().

◆ codec37_mv()

static void codec37_mv	(	uint8_t *	dst,
		const uint8_t *	src,
		int	height,
		int	stride,
		int	x,
		int	y
	)

inlinestatic

Definition at line 603 of file sanm.c.

Referenced by old_codec37().

◆ old_codec37()

static int old_codec37	(	SANMVideoContext *	ctx,
		int	top,
		int	left,
		int	width,
		int	height
	)

static

Definition at line 622 of file sanm.c.

Referenced by process_frame_obj().

◆ process_block()

static int process_block	(	SANMVideoContext *	ctx,
		uint8_t *	dst,
		uint8_t *	prev1,
		uint8_t *	prev2,
		int	stride,
		int	tbl,
		int	size
	)

static

Definition at line 768 of file sanm.c.

Referenced by old_codec47().

◆ old_codec47()

static int old_codec47	(	SANMVideoContext *	ctx,
		int	top,
		int	left,
		int	width,
		int	height
	)

static

Definition at line 858 of file sanm.c.

Referenced by process_frame_obj().

◆ process_frame_obj()

static int process_frame_obj ( SANMVideoContext * ctx )

static

Definition at line 949 of file sanm.c.

Referenced by decode_frame().

◆ decode_0()

static int decode_0 ( SANMVideoContext * ctx )

static

Definition at line 990 of file sanm.c.

◆ decode_nop()

static int decode_nop ( SANMVideoContext * ctx )

static

Definition at line 1007 of file sanm.c.

◆ copy_block()

static void copy_block	(	uint16_t *	pdest,
		uint16_t *	psrc,
		int	block_size,
		ptrdiff_t	pitch
	)

static

Definition at line 1013 of file sanm.c.

Referenced by codec2subblock().

◆ fill_block()

static void fill_block	(	uint16_t *	pdest,
		uint16_t	color,
		int	block_size,
		ptrdiff_t	pitch
	)

static

Definition at line 1032 of file sanm.c.

Referenced by codec2subblock().

◆ draw_glyph()

static int draw_glyph	(	SANMVideoContext *	ctx,
		uint16_t *	dst,
		int	index,
		uint16_t	fg_color,
		uint16_t	bg_color,
		int	block_size,
		ptrdiff_t	pitch
	)

static

Definition at line 1042 of file sanm.c.

Referenced by opcode_0xf7(), and opcode_0xf8().

◆ opcode_0xf7()

static int opcode_0xf7	(	SANMVideoContext *	ctx,
		int	cx,
		int	cy,
		int	block_size,
		ptrdiff_t	pitch
	)

static

Definition at line 1064 of file sanm.c.

Referenced by codec2subblock().

◆ opcode_0xf8()

static int opcode_0xf8	(	SANMVideoContext *	ctx,
		int	cx,
		int	cy,
		int	block_size,
		ptrdiff_t	pitch
	)

static

Definition at line 1098 of file sanm.c.

Referenced by codec2subblock().

◆ good_mvec()

static int good_mvec	(	SANMVideoContext *	ctx,
		int	cx,
		int	cy,
		int	mx,
		int	my,
		int	block_size
	)

static

Definition at line 1126 of file sanm.c.

Referenced by codec2subblock().

◆ codec2subblock()

static int codec2subblock	(	SANMVideoContext *	ctx,
		int	cx,
		int	cy,
		int	blk_size
	)

static

Definition at line 1142 of file sanm.c.

Referenced by decode_2().

◆ decode_2()

static int decode_2 ( SANMVideoContext * ctx )

static

Definition at line 1227 of file sanm.c.

◆ decode_3()

static int decode_3 ( SANMVideoContext * ctx )

static

Definition at line 1239 of file sanm.c.

◆ decode_4()

static int decode_4 ( SANMVideoContext * ctx )

static

Definition at line 1245 of file sanm.c.

◆ decode_5()

static int decode_5 ( SANMVideoContext * ctx )

static

Definition at line 1251 of file sanm.c.

◆ decode_6()

static int decode_6 ( SANMVideoContext * ctx )

static

Definition at line 1274 of file sanm.c.

◆ decode_8()

static int decode_8 ( SANMVideoContext * ctx )

static

Definition at line 1289 of file sanm.c.

◆ read_frame_header()

static int read_frame_header	(	SANMVideoContext *	ctx,
		SANMFrameHeader *	hdr
	)

static

Definition at line 1318 of file sanm.c.

Referenced by decode_frame().

◆ fill_frame()

static void fill_frame	(	uint16_t *	pbuf,
		int	buf_size,
		uint16_t	color
	)

static

Definition at line 1358 of file sanm.c.

Referenced by decode_frame().

◆ copy_output()

static int copy_output	(	SANMVideoContext *	ctx,
		SANMFrameHeader *	hdr
	)

static

Definition at line 1366 of file sanm.c.

Referenced by decode_frame().

◆ decode_frame()

static int decode_frame	(	AVCodecContext *	avctx,
		AVFrame *	frame,
		int *	got_frame_ptr,
		AVPacket *	pkt
	)

static

Definition at line 1388 of file sanm.c.

Variable Documentation

◆ glyph4_x

const int8_t glyph4_x[GLYPH_COORD_VECT_SIZE]

static

Initial value:

= {
    0, 1, 2, 3, 3, 3, 3, 2, 1, 0, 0, 0, 1, 2, 2, 1
}

Definition at line 36 of file sanm.c.

Referenced by decode_init().

◆ glyph4_y

const int8_t glyph4_y[GLYPH_COORD_VECT_SIZE]

static

Initial value:

= {
    0, 0, 0, 0, 1, 2, 3, 3, 3, 3, 2, 1, 1, 1, 2, 2
}

Definition at line 40 of file sanm.c.

Referenced by decode_init().

◆ glyph8_x

const int8_t glyph8_x[GLYPH_COORD_VECT_SIZE]

static

Initial value:

= {
    0, 2, 5, 7, 7, 7, 7, 7, 7, 5, 2, 0, 0, 0, 0, 0
}

Definition at line 44 of file sanm.c.

Referenced by decode_init().

◆ glyph8_y

const int8_t glyph8_y[GLYPH_COORD_VECT_SIZE]

static

Initial value:

= {
    0, 0, 0, 0, 1, 3, 4, 6, 7, 7, 7, 7, 6, 4, 3, 1
}

Definition at line 48 of file sanm.c.

Referenced by decode_init().

◆ motion_vectors

const int8_t motion_vectors[256][2]

static

Definition at line 52 of file sanm.c.

Referenced by codec2subblock(), and process_block().

◆ c37_mv

const int8_t c37_mv[]

static

Definition at line 106 of file sanm.c.

Referenced by old_codec37().

◆ v1_decoders

const frm_decoder v1_decoders[]

static

Initial value:

= {
    decode_0, decode_nop, decode_2, decode_3, decode_4, decode_5,
    decode_6, decode_nop, decode_8
}

Definition at line 1313 of file sanm.c.

Referenced by decode_frame().

◆ ff_sanm_decoder

const FFCodec ff_sanm_decoder

Initial value:

= {
    .p.name         = "sanm",
    CODEC_LONG_NAME("LucasArts SANM/Smush video"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_SANM,
    .priv_data_size = sizeof(SANMVideoContext),
    .init           = decode_init,
    .close          = decode_end,
    FF_CODEC_DECODE_CB(decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
}

Definition at line 1519 of file sanm.c.

Data Structures

Macros

Typedefs

Enumerations

Functions

Variables

Macro Definition Documentation

◆ NGLYPHS

◆ GLYPH_COORD_VECT_SIZE

◆ PALETTE_SIZE

◆ PALETTE_DELTA

Typedef Documentation

◆ frm_decoder

Enumeration Type Documentation

◆ GlyphEdge

◆ GlyphDir

Function Documentation

◆ which_edge()

◆ which_direction()

◆ interp_point()

◆ make_glyphs()

◆ init_sizes()

◆ destroy_buffers()

◆ init_buffers()

◆ rotate_bufs()

◆ decode_init()

◆ decode_end()

◆ rle_decode()

◆ old_codec1()

◆ codec37_mv()

◆ old_codec37()

◆ process_block()

◆ old_codec47()

◆ process_frame_obj()

◆ decode_0()

◆ decode_nop()

◆ copy_block()

◆ fill_block()

◆ draw_glyph()

◆ opcode_0xf7()

◆ opcode_0xf8()

◆ good_mvec()

◆ codec2subblock()

◆ decode_2()

◆ decode_3()

◆ decode_4()

◆ decode_5()

◆ decode_6()

◆ decode_8()

◆ read_frame_header()

◆ fill_frame()

◆ copy_output()

◆ decode_frame()

Variable Documentation

◆ glyph4_x

◆ glyph4_y

◆ glyph8_x

◆ glyph8_y

◆ motion_vectors

◆ c37_mv

◆ v1_decoders

◆ ff_sanm_decoder