sanm.c File Reference

#include "avcodec.h"
#include "copy_block.h"
#include "bytestream.h"
#include "internal.h"
#include "libavutil/bswap.h"
#include "libavutil/imgutils.h"
#include "sanm_data.h"
#include "libavutil/avassert.h"

Go to the source code of this file.

Data Structures
struct	SANMVideoContext
struct	SANMFrameHeader

Macros
#define	NGLYPHS   256

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.
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)
	Interpolate two points.
static void	make_glyphs (int8_t *pglyphs, const int8_t *xvec, const int8_t *yvec, const int side_length)
	Construct glyphs by iterating through vectors 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	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, int pitch)
static void	fill_block (uint16_t *pdest, uint16_t color, int block_size, int pitch)
static int	draw_glyph (SANMVideoContext *ctx, uint16_t *dst, int index, uint16_t fg_color, uint16_t bg_color, int block_size, int pitch)
static int	opcode_0xf7 (SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch)
static int	opcode_0xf8 (SANMVideoContext *ctx, int cx, int cy, int block_size, int 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, void *data, int *got_frame_ptr, AVPacket *pkt)

Variables
static const frm_decoder	v1_decoders []
AVCodec	ff_sanm_decoder

Macro Definition Documentation

#define NGLYPHS   256

Definition at line 34 of file sanm.c.

Referenced by draw_glyph().

Typedef Documentation

typedef int(* frm_decoder)(SANMVideoContext *ctx)

Definition at line 1092 of file sanm.c.

Enumeration Type Documentation

enum GlyphEdge

Enumerator:

LEFT_EDGE
TOP_EDGE
RIGHT_EDGE
BOTTOM_EDGE
NO_EDGE

Definition at line 76 of file sanm.c.

enum GlyphDir

Enumerator:

DIR_LEFT
DIR_UP
DIR_RIGHT
DIR_DOWN
NO_DIR

Definition at line 84 of file sanm.c.

Function Documentation

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 99 of file sanm.c.

Referenced by make_glyphs().

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

static

Definition at line 116 of file sanm.c.

Referenced by make_glyphs().

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

static

Interpolate two points.

Definition at line 142 of file sanm.c.

Referenced by 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 vectors coordinates.

Parameters

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

Definition at line 162 of file sanm.c.

Referenced by decode_init().

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

static

Definition at line 214 of file sanm.c.

Referenced by decode_init(), and process_frame_obj().

static void destroy_buffers ( SANMVideoContext *  ctx )

static

Definition at line 227 of file sanm.c.

Referenced by decode_end(), and init_buffers().

static av_cold int init_buffers ( SANMVideoContext *  ctx )

static

Definition at line 239 of file sanm.c.

Referenced by decode_init(), and process_frame_obj().

static void rotate_bufs ( SANMVideoContext *  ctx, int  rotate_code  )

static

Definition at line 255 of file sanm.c.

Referenced by decode_frame(), and old_codec37().

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 263 of file sanm.c.

static av_cold int decode_end ( AVCodecContext *  avctx )

static

Definition at line 297 of file sanm.c.

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

static

Definition at line 306 of file sanm.c.

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

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

static

Definition at line 332 of file sanm.c.

Referenced by process_frame_obj().

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

inlinestatic

Definition at line 379 of file sanm.c.

Referenced by old_codec37().

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

static

Definition at line 398 of file sanm.c.

Referenced by process_frame_obj().

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 545 of file sanm.c.

Referenced by old_codec47().

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

static

Definition at line 635 of file sanm.c.

Referenced by process_frame_obj().

static int process_frame_obj ( SANMVideoContext *  ctx )

static

Definition at line 725 of file sanm.c.

Referenced by decode_frame().

static int decode_0 ( SANMVideoContext *  ctx )

static

Definition at line 772 of file sanm.c.

static int decode_nop ( SANMVideoContext *  ctx )

static

Definition at line 789 of file sanm.c.

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

static

Definition at line 795 of file sanm.c.

Referenced by codec2subblock().

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

static

Definition at line 814 of file sanm.c.

Referenced by codec2subblock().

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

static

Definition at line 824 of file sanm.c.

Referenced by opcode_0xf7(), and opcode_0xf8().

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

static

Definition at line 845 of file sanm.c.

Referenced by codec2subblock().

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

static

Definition at line 876 of file sanm.c.

Referenced by codec2subblock().

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

static

Definition at line 904 of file sanm.c.

Referenced by codec2subblock().

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

static

Definition at line 920 of file sanm.c.

Referenced by decode_2().

static int decode_2 ( SANMVideoContext *  ctx )

static

Definition at line 1006 of file sanm.c.

static int decode_3 ( SANMVideoContext *  ctx )

static

Definition at line 1020 of file sanm.c.

static int decode_4 ( SANMVideoContext *  ctx )

static

Definition at line 1026 of file sanm.c.

static int decode_5 ( SANMVideoContext *  ctx )

static

Definition at line 1032 of file sanm.c.

static int decode_6 ( SANMVideoContext *  ctx )

static

Definition at line 1055 of file sanm.c.

static int decode_8 ( SANMVideoContext *  ctx )

static

Definition at line 1070 of file sanm.c.

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

static

Definition at line 1099 of file sanm.c.

Referenced by decode_frame().

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

static

Definition at line 1140 of file sanm.c.

Referenced by decode_frame().

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

static

Definition at line 1146 of file sanm.c.

Referenced by decode_frame().

static int decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame_ptr, AVPacket *  pkt  )

static

Definition at line 1168 of file sanm.c.

Variable Documentation

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 1094 of file sanm.c.

Referenced by decode_frame().

AVCodec ff_sanm_decoder

Initial value:

= {
    .name           = "sanm",
    .long_name      = NULL_IF_CONFIG_SMALL("LucasArts SMUSH video"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_SANM,
    .priv_data_size = sizeof(SANMVideoContext),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame,
    .capabilities   = CODEC_CAP_DR1,
}

Definition at line 1296 of file sanm.c.