sanm.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/mem.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

Macros
#define	NGLYPHS   256
#define	GLYPH_COORD_VECT_SIZE   16
#define	PALETTE_SIZE   256
#define	PALETTE_DELTA   768

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.
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.
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	codec33_gen_tiles (SANMVideoContext *ctx, int8_t param1)
static void	codec4_gen_tiles (SANMVideoContext *ctx, uint16_t param1)
static int	codec4_load_tiles (SANMVideoContext *ctx, GetByteContext *gb, uint16_t param2, uint8_t clr)
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	old_codec4 (SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int w, int h, uint8_t param, uint16_t param2, int codec)
static int	rle_decode (SANMVideoContext *ctx, GetByteContext *gb, uint8_t *dst, const int out_size)
static int	old_codec23 (SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int width, int height, uint8_t param, uint16_t param2)
static int	old_codec21 (SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int width, int height)
static int	old_codec1 (SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int width, int height, int opaque)
static int	old_codec31 (SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int width, int height, int p1, int opaque)
static int	old_codec2 (SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int width, int height)
static void	blt_solid (uint8_t *dst, const uint8_t *src, int16_t left, int16_t top, uint16_t srcxoff, uint16_t srcyoff, uint16_t srcwidth, uint16_t srcheight, const uint16_t srcpitch, const uint16_t dstpitch, const uint16_t dstheight, int32_t size)
static void	blt_mask (uint8_t *dst, const uint8_t *src, int16_t left, int16_t top, uint16_t srcxoff, uint16_t srcyoff, uint16_t srcwidth, uint16_t srcheight, const uint16_t srcpitch, const uint16_t dstpitch, const uint16_t dstheight, int32_t size, const uint8_t skipcolor)
static void	blt_ipol (uint8_t *dst, const uint8_t *src1, const uint8_t *src2, int16_t left, int16_t top, uint16_t srcxoff, uint16_t srcyoff, uint16_t srcwidth, uint16_t srcheight, const uint16_t srcpitch, const uint16_t dstpitch, const uint16_t dstheight, int32_t size, const uint8_t *itbl)
static int	old_codec20 (SANMVideoContext *ctx, GetByteContext *gb, int top, int left, const int w, const int h)
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, GetByteContext *gb, int top, int left, int width, int height)
static int	codec47_block (SANMVideoContext *ctx, GetByteContext *gb, uint8_t *dst, uint8_t *prev1, uint8_t *prev2, int stride, int size)
static void	codec47_read_interptable (GetByteContext *gb, uint8_t *itbl)
static void	codec47_comp1 (GetByteContext *gb, uint8_t *dst_in, int width, const int height, const ptrdiff_t stride, const uint8_t *itbl)
static int	old_codec47 (SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int width, int height)
static void	c48_4to8 (uint8_t *dst, const uint8_t *src, const uint16_t w)
static int	c48_invalid_mv (int x, int y, const uint16_t w, int h, int blocksize, int mvofs)
static int	codec48_block (GetByteContext *gb, uint8_t *dst, uint8_t *db, int x, int y, const uint16_t w, const int aligned_height, const uint8_t *itbl)
static int	old_codec48 (SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int width, int height)
static void	old_codec45 (SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int flag)
static int	process_frame_obj (SANMVideoContext *ctx, GetByteContext *gb, int xoff, int yoff)
static int	process_ftch (SANMVideoContext *ctx, int size)
static int	process_xpal (SANMVideoContext *ctx, int size)
static int	bl16_decode_0 (SANMVideoContext *ctx)
static uint16_t	bl16_c1_avg_col (uint16_t c1, uint16_t c2)
static int	bl16_decode_1 (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	bl16_block (SANMVideoContext *ctx, int cx, int cy, int blk_size)
static int	bl16_decode_2 (SANMVideoContext *ctx)
static int	bl16_decode_5 (SANMVideoContext *ctx, int rle_size)
static int	bl16_decode_6 (SANMVideoContext *ctx)
static int	bl16_decode_7 (SANMVideoContext *ctx)
static int	bl16_decode_8 (SANMVideoContext *ctx)
static void	fill_frame (uint16_t *pbuf, int buf_size, uint16_t color)
static int	copy_output (SANMVideoContext *ctx, int sanm)
static int	decode_bl16 (AVCodecContext *avctx, int *got_frame_ptr)
static int	decode_anim (AVCodecContext *avctx, int *got_frame_ptr)
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	c47_mv [256][2]
static const int8_t	c37_mv []
const FFCodec	ff_sanm_decoder

Macro Definition Documentation

NGLYPHS

#define NGLYPHS   256

Definition at line 32 of file sanm.c.

Referenced by draw_glyph().

GLYPH_COORD_VECT_SIZE

#define GLYPH_COORD_VECT_SIZE   16

Definition at line 33 of file sanm.c.

Referenced by make_glyphs().

PALETTE_SIZE

#define PALETTE_SIZE   256

Definition at line 34 of file sanm.c.

Referenced by decode_anim(), decode_init(), process_xpal(), wc3_read_header(), and xan_decode_frame().

PALETTE_DELTA

#define PALETTE_DELTA   768

Definition at line 35 of file sanm.c.

Referenced by process_xpal().

Enumeration Type Documentation

GlyphEdge

enum GlyphEdge

Enumerator
LEFT_EDGE
TOP_EDGE
RIGHT_EDGE
BOTTOM_EDGE
NO_EDGE

Definition at line 307 of file sanm.c.

GlyphDir

enum GlyphDir

Enumerator
DIR_LEFT
DIR_UP
DIR_RIGHT
DIR_DOWN
NO_DIR

Definition at line 315 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 330 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 346 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 369 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 389 of file sanm.c.

Referenced by decode_init().

init_sizes()

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

static

Definition at line 441 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 454 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 468 of file sanm.c.

Referenced by decode_init(), and process_frame_obj().

codec33_gen_tiles()

static void codec33_gen_tiles ( SANMVideoContext * ctx, int8_t param1 )

static

Definition at line 489 of file sanm.c.

Referenced by old_codec4().

codec4_gen_tiles()

static void codec4_gen_tiles ( SANMVideoContext * ctx, uint16_t param1 )

static

Definition at line 553 of file sanm.c.

Referenced by old_codec4().

codec4_load_tiles()

static int codec4_load_tiles ( SANMVideoContext * ctx, GetByteContext * gb, uint16_t param2, uint8_t clr )

static

Definition at line 602 of file sanm.c.

Referenced by old_codec4().

rotate_bufs()

static void rotate_bufs ( SANMVideoContext * ctx, int rotate_code )

static

Definition at line 620 of file sanm.c.

Referenced by decode_bl16(), and old_codec47().

decode_init()

static av_cold int decode_init ( AVCodecContext * avctx )

static

Definition at line 627 of file sanm.c.

decode_end()

static av_cold int decode_end ( AVCodecContext * avctx )

static

Definition at line 683 of file sanm.c.

old_codec4()

static int old_codec4 ( SANMVideoContext * ctx, GetByteContext * gb, int top, int left, int w, int h, uint8_t param, uint16_t param2, int codec )

static

Definition at line 692 of file sanm.c.

Referenced by process_frame_obj().

rle_decode()

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

static

Definition at line 759 of file sanm.c.

Referenced by bl16_decode_5(), bl16_decode_8(), old_codec37(), old_codec47(), and old_codec48().

old_codec23()

static int old_codec23 ( SANMVideoContext * ctx, GetByteContext * gb, int top, int left, int width, int height, uint8_t param, uint16_t param2 )

static

Definition at line 785 of file sanm.c.

Referenced by process_frame_obj().

old_codec21()

static int old_codec21 ( SANMVideoContext * ctx, GetByteContext * gb, int top, int left, int width, int height )

static

Definition at line 851 of file sanm.c.

Referenced by process_frame_obj().

old_codec1()

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

static

Definition at line 896 of file sanm.c.

Referenced by process_frame_obj().

old_codec31()

static int old_codec31 ( SANMVideoContext * ctx, GetByteContext * gb, int top, int left, int width, int height, int p1, int opaque )

static

Definition at line 963 of file sanm.c.

Referenced by process_frame_obj().

old_codec2()

static int old_codec2 ( SANMVideoContext * ctx, GetByteContext * gb, int top, int left, int width, int height )

static

Definition at line 1029 of file sanm.c.

Referenced by process_frame_obj().

blt_solid()

static void blt_solid ( uint8_t * dst, const uint8_t * src, int16_t left, int16_t top, uint16_t srcxoff, uint16_t srcyoff, uint16_t srcwidth, uint16_t srcheight, const uint16_t srcpitch, const uint16_t dstpitch, const uint16_t dstheight, int32_t size )

static

Definition at line 1047 of file sanm.c.

Referenced by old_codec20(), old_codec37(), old_codec47(), and old_codec48().

blt_mask()

static void blt_mask ( uint8_t * dst, const uint8_t * src, int16_t left, int16_t top, uint16_t srcxoff, uint16_t srcyoff, uint16_t srcwidth, uint16_t srcheight, const uint16_t srcpitch, const uint16_t dstpitch, const uint16_t dstheight, int32_t size, const uint8_t skipcolor )

static

Definition at line 1099 of file sanm.c.

Referenced by old_codec37(), and old_codec48().

blt_ipol()

static void blt_ipol ( uint8_t * dst, const uint8_t * src1, const uint8_t * src2, int16_t left, int16_t top, uint16_t srcxoff, uint16_t srcyoff, uint16_t srcwidth, uint16_t srcheight, const uint16_t srcpitch, const uint16_t dstpitch, const uint16_t dstheight, int32_t size, const uint8_t * itbl )

static

Definition at line 1151 of file sanm.c.

Referenced by old_codec48().

old_codec20()

static int old_codec20 ( SANMVideoContext * ctx, GetByteContext * gb, int top, int left, const int w, const int h )

static

Definition at line 1205 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 1214 of file sanm.c.

Referenced by old_codec37().

old_codec37()

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

static

Definition at line 1233 of file sanm.c.

Referenced by process_frame_obj().

codec47_block()

static int codec47_block ( SANMVideoContext * ctx, GetByteContext * gb, uint8_t * dst, uint8_t * prev1, uint8_t * prev2, int stride, int size )

static

Definition at line 1420 of file sanm.c.

Referenced by codec47_block(), and old_codec47().

codec47_read_interptable()

static void codec47_read_interptable ( GetByteContext * gb, uint8_t * itbl )

static

Definition at line 1506 of file sanm.c.

Referenced by old_codec47(), and old_codec48().

codec47_comp1()

static void codec47_comp1 ( GetByteContext * gb, uint8_t * dst_in, int width, const int height, const ptrdiff_t stride, const uint8_t * itbl )

static

Definition at line 1522 of file sanm.c.

Referenced by old_codec47(), and old_codec48().

old_codec47()

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

static

Definition at line 1555 of file sanm.c.

Referenced by process_frame_obj().

c48_4to8()

static void c48_4to8 ( uint8_t * dst, const uint8_t * src, const uint16_t w )

static

Definition at line 1654 of file sanm.c.

Referenced by codec48_block().

c48_invalid_mv()

static int c48_invalid_mv ( int x, int y, const uint16_t w, int h, int blocksize, int mvofs )

static

Definition at line 1669 of file sanm.c.

Referenced by codec48_block().

codec48_block()

static int codec48_block ( GetByteContext * gb, uint8_t * dst, uint8_t * db, int x, int y, const uint16_t w, const int aligned_height, const uint8_t * itbl )

static

Definition at line 1679 of file sanm.c.

Referenced by old_codec48().

old_codec48()

static int old_codec48 ( SANMVideoContext * ctx, GetByteContext * gb, int top, int left, int width, int height )

static

Definition at line 1856 of file sanm.c.

Referenced by process_frame_obj().

old_codec45()

static void old_codec45 ( SANMVideoContext * ctx, GetByteContext * gb, int top, int left, int flag )

static

Definition at line 1967 of file sanm.c.

Referenced by process_frame_obj().

process_frame_obj()

static int process_frame_obj ( SANMVideoContext * ctx, GetByteContext * gb, int xoff, int yoff )

static

Definition at line 2027 of file sanm.c.

Referenced by decode_anim(), and process_ftch().

process_ftch()

static int process_ftch ( SANMVideoContext * ctx, int size )

static

Definition at line 2165 of file sanm.c.

Referenced by decode_anim().

process_xpal()

static int process_xpal ( SANMVideoContext * ctx, int size )

static

Definition at line 2205 of file sanm.c.

Referenced by decode_anim().

bl16_decode_0()

static int bl16_decode_0 ( SANMVideoContext * ctx )

static

Definition at line 2252 of file sanm.c.

Referenced by decode_bl16().

bl16_c1_avg_col()

static uint16_t bl16_c1_avg_col ( uint16_t c1, uint16_t c2 )

inlinestatic

Definition at line 2270 of file sanm.c.

Referenced by bl16_decode_1(), and bl16_decode_7().

bl16_decode_1()

static int bl16_decode_1 ( SANMVideoContext * ctx )

static

Definition at line 2281 of file sanm.c.

Referenced by decode_bl16().

copy_block()

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

static

Definition at line 2325 of file sanm.c.

Referenced by bl16_block().

fill_block()

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

static

Definition at line 2344 of file sanm.c.

Referenced by bl16_block().

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 2354 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 2376 of file sanm.c.

Referenced by bl16_block().

opcode_0xf8()

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

static

Definition at line 2410 of file sanm.c.

Referenced by bl16_block().

good_mvec()

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

static

Definition at line 2438 of file sanm.c.

Referenced by bl16_block().

bl16_block()

static int bl16_block ( SANMVideoContext * ctx, int cx, int cy, int blk_size )

static

Definition at line 2454 of file sanm.c.

Referenced by bl16_block(), and bl16_decode_2().

bl16_decode_2()

static int bl16_decode_2 ( SANMVideoContext * ctx )

static

Definition at line 2553 of file sanm.c.

Referenced by decode_bl16().

bl16_decode_5()

static int bl16_decode_5 ( SANMVideoContext * ctx, int rle_size )

static

Definition at line 2565 of file sanm.c.

Referenced by decode_bl16().

bl16_decode_6()

static int bl16_decode_6 ( SANMVideoContext * ctx )

static

Definition at line 2588 of file sanm.c.

Referenced by decode_bl16().

bl16_decode_7()

static int bl16_decode_7 ( SANMVideoContext * ctx )

static

Definition at line 2608 of file sanm.c.

Referenced by decode_bl16().

bl16_decode_8()

static int bl16_decode_8 ( SANMVideoContext * ctx )

static

Definition at line 2652 of file sanm.c.

Referenced by decode_bl16().

fill_frame()

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

static

Definition at line 2674 of file sanm.c.

Referenced by decode_bl16(), and fill_frame().

copy_output()

static int copy_output ( SANMVideoContext * ctx, int sanm )

static

Definition at line 2682 of file sanm.c.

Referenced by decode_anim(), and decode_bl16().

decode_bl16()

static int decode_bl16 ( AVCodecContext * avctx, int * got_frame_ptr )

static

Definition at line 2704 of file sanm.c.

Referenced by decode_frame().

decode_anim()

static int decode_anim ( AVCodecContext * avctx, int * got_frame_ptr )

static

Definition at line 2790 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 2900 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 37 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 41 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 45 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 49 of file sanm.c.

Referenced by decode_init().

c47_mv

const int8_t c47_mv[256][2]

static

Definition at line 54 of file sanm.c.

Referenced by bl16_block(), and codec47_block().

c37_mv

const int8_t c37_mv[]

static

Definition at line 109 of file sanm.c.

Referenced by codec48_block(), and old_codec37().

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 2919 of file sanm.c.