cdgraphics.c File Reference

CD Graphics Video Decoder. More...

#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"
#include "libavutil/attributes.h"

Go to the source code of this file.

Data Structures
struct	CDGraphicsContext

Macros
#define	CDG_FULL_WIDTH   300
	default screen sizes
#define	CDG_FULL_HEIGHT   216
#define	CDG_DISPLAY_WIDTH   294
#define	CDG_DISPLAY_HEIGHT   204
#define	CDG_BORDER_WIDTH   6
#define	CDG_BORDER_HEIGHT   12
#define	CDG_COMMAND   0x09
	masks
#define	CDG_MASK   0x3F
#define	CDG_INST_MEMORY_PRESET   1
	instruction codes
#define	CDG_INST_BORDER_PRESET   2
#define	CDG_INST_TILE_BLOCK   6
#define	CDG_INST_SCROLL_PRESET   20
#define	CDG_INST_SCROLL_COPY   24
#define	CDG_INST_TRANSPARENT_COL   28
#define	CDG_INST_LOAD_PAL_LO   30
#define	CDG_INST_LOAD_PAL_HIGH   31
#define	CDG_INST_TILE_BLOCK_XOR   38
#define	CDG_PACKET_SIZE   24
	data sizes
#define	CDG_DATA_SIZE   16
#define	CDG_TILE_HEIGHT   12
#define	CDG_TILE_WIDTH   6
#define	CDG_MINIMUM_PKT_SIZE   6
#define	CDG_MINIMUM_SCROLL_SIZE   3
#define	CDG_HEADER_SIZE   8
#define	CDG_PALETTE_SIZE   16
#define	UP   2
#define	DOWN   1
#define	LEFT   2
#define	RIGHT   1

Functions
static av_cold int	cdg_decode_init (AVCodecContext *avctx)
static void	cdg_border_preset (CDGraphicsContext *cc, uint8_t *data)
static void	cdg_load_palette (CDGraphicsContext *cc, uint8_t *data, int low)
static int	cdg_tile_block (CDGraphicsContext *cc, uint8_t *data, int b)
static void	cdg_copy_rect_buf (int out_tl_x, int out_tl_y, uint8_t *out, int in_tl_x, int in_tl_y, uint8_t *in, int w, int h, int stride)
static void	cdg_fill_rect_preset (int tl_x, int tl_y, uint8_t *out, int color, int w, int h, int stride)
static void	cdg_fill_wrapper (int out_tl_x, int out_tl_y, uint8_t *out, int in_tl_x, int in_tl_y, uint8_t *in, int color, int w, int h, int stride, int roll)
static void	cdg_scroll (CDGraphicsContext *cc, uint8_t *data, AVFrame *new_frame, int roll_over)
static int	cdg_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
static av_cold void	cdg_decode_flush (AVCodecContext *avctx)
static av_cold int	cdg_decode_end (AVCodecContext *avctx)

Variables
const FFCodec	ff_cdgraphics_decoder

Detailed Description

CD Graphics Video Decoder.

Author

Michael Tison

See also

http://wiki.multimedia.cx/index.php?title=CD_Graphics

http://www.ccs.neu.edu/home/bchafy/cdb/info/cdg

Definition in file cdgraphics.c.

Macro Definition Documentation

CDG_FULL_WIDTH

#define CDG_FULL_WIDTH   300

default screen sizes

Definition at line 38 of file cdgraphics.c.

Referenced by cdg_border_preset(), cdg_decode_init(), cdg_scroll(), and cdg_tile_block().

CDG_FULL_HEIGHT

#define CDG_FULL_HEIGHT   216

Definition at line 39 of file cdgraphics.c.

Referenced by cdg_border_preset(), cdg_decode_init(), cdg_scroll(), and cdg_tile_block().

CDG_DISPLAY_WIDTH

#define CDG_DISPLAY_WIDTH   294

Definition at line 40 of file cdgraphics.c.

CDG_DISPLAY_HEIGHT

#define CDG_DISPLAY_HEIGHT   204

Definition at line 41 of file cdgraphics.c.

CDG_BORDER_WIDTH

#define CDG_BORDER_WIDTH   6

Definition at line 42 of file cdgraphics.c.

Referenced by cdg_border_preset(), and cdg_scroll().

CDG_BORDER_HEIGHT

#define CDG_BORDER_HEIGHT   12

Definition at line 43 of file cdgraphics.c.

Referenced by cdg_border_preset(), and cdg_scroll().

CDG_COMMAND

#define CDG_COMMAND   0x09

masks

Definition at line 46 of file cdgraphics.c.

Referenced by cdg_decode_frame(), read_packet(), and read_probe().

CDG_MASK

#define CDG_MASK   0x3F

Definition at line 47 of file cdgraphics.c.

Referenced by cdg_decode_frame(), read_packet(), and read_probe().

CDG_INST_MEMORY_PRESET

#define CDG_INST_MEMORY_PRESET   1

instruction codes

Definition at line 50 of file cdgraphics.c.

Referenced by cdg_decode_frame().

CDG_INST_BORDER_PRESET

#define CDG_INST_BORDER_PRESET   2

Definition at line 51 of file cdgraphics.c.

Referenced by cdg_decode_frame().

CDG_INST_TILE_BLOCK

#define CDG_INST_TILE_BLOCK   6

Definition at line 52 of file cdgraphics.c.

Referenced by cdg_decode_frame().

CDG_INST_SCROLL_PRESET

#define CDG_INST_SCROLL_PRESET   20

Definition at line 53 of file cdgraphics.c.

Referenced by cdg_decode_frame().

CDG_INST_SCROLL_COPY

#define CDG_INST_SCROLL_COPY   24

Definition at line 54 of file cdgraphics.c.

Referenced by cdg_decode_frame().

CDG_INST_TRANSPARENT_COL

#define CDG_INST_TRANSPARENT_COL   28

Definition at line 55 of file cdgraphics.c.

Referenced by cdg_decode_frame().

CDG_INST_LOAD_PAL_LO

#define CDG_INST_LOAD_PAL_LO   30

Definition at line 56 of file cdgraphics.c.

Referenced by cdg_decode_frame().

CDG_INST_LOAD_PAL_HIGH

#define CDG_INST_LOAD_PAL_HIGH   31

Definition at line 57 of file cdgraphics.c.

Referenced by cdg_decode_frame().

CDG_INST_TILE_BLOCK_XOR

#define CDG_INST_TILE_BLOCK_XOR   38

Definition at line 58 of file cdgraphics.c.

Referenced by cdg_decode_frame().

CDG_PACKET_SIZE

#define CDG_PACKET_SIZE   24

data sizes

Definition at line 61 of file cdgraphics.c.

Referenced by read_header(), read_packet(), and read_probe().

CDG_DATA_SIZE

#define CDG_DATA_SIZE   16

Definition at line 62 of file cdgraphics.c.

Referenced by cdg_decode_frame().

CDG_TILE_HEIGHT

#define CDG_TILE_HEIGHT   12

Definition at line 63 of file cdgraphics.c.

Referenced by cdg_tile_block().

CDG_TILE_WIDTH

#define CDG_TILE_WIDTH   6

Definition at line 64 of file cdgraphics.c.

Referenced by cdg_tile_block().

CDG_MINIMUM_PKT_SIZE

#define CDG_MINIMUM_PKT_SIZE   6

Definition at line 65 of file cdgraphics.c.

Referenced by cdg_decode_frame().

CDG_MINIMUM_SCROLL_SIZE

#define CDG_MINIMUM_SCROLL_SIZE   3

Definition at line 66 of file cdgraphics.c.

Referenced by cdg_decode_frame().

CDG_HEADER_SIZE

#define CDG_HEADER_SIZE   8

Definition at line 67 of file cdgraphics.c.

Referenced by cdg_decode_frame().

CDG_PALETTE_SIZE

#define CDG_PALETTE_SIZE   16

Definition at line 68 of file cdgraphics.c.

Referenced by cdg_decode_frame(), cdg_decode_init(), and cdg_scroll().

UP

#define UP   2

Definition at line 166 of file cdgraphics.c.

Referenced by cdg_scroll(), cube_to_xyz(), get_direction(), prepare_eac_in(), prepare_eac_out(), process_cube_coordinates(), wv_unpack_dsd_high(), xyz_to_cube(), and xyz_to_tspyramid().

DOWN

#define DOWN   1

Definition at line 167 of file cdgraphics.c.

Referenced by cdg_scroll(), cube_to_xyz(), get_direction(), init_ptable(), prepare_eac_in(), prepare_eac_out(), process_cube_coordinates(), wv_unpack_dsd_high(), xyz_to_cube(), and xyz_to_tspyramid().

LEFT

#define LEFT   2

Definition at line 168 of file cdgraphics.c.

Referenced by alf_get_edges(), alf_get_subblock(), alf_prepare_buffer(), aptx_check_parity(), cclm_get_select_pos(), cclm_select_chroma(), cclm_select_luma(), cclm_select_samples(), cdg_scroll(), config_output(), cube_to_xyz(), decode_init(), decode_pixel_in_context(), decode_slice(), ff_h264_decode_mb_cabac(), ff_h264_filter_mb(), fill_decode_caches(), framepack_uninit(), get_cubemap32_map(), get_cubemap_face_map(), get_direction(), get_rotated_cubemap_map(), horizontal_frame_pack(), magy_decode_slice(), magy_decode_slice10(), magy_encode_init(), mss4_decode_dct(), mss4_decode_dct_block(), mss4_update_dc_cache(), prepare_eac_in(), prepare_eac_out(), process_cube_coordinates(), sao_copy_hor(), sao_extends_edges(), sao_get_edges(), try_push_frame(), xyz_to_cube(), and xyz_to_tspyramid().

RIGHT

#define RIGHT   1

Definition at line 169 of file cdgraphics.c.

Referenced by alf_get_edges(), alf_get_subblock(), alf_prepare_buffer(), aptx_check_parity(), cdg_scroll(), config_output(), cube_to_xyz(), framepack_uninit(), get_cubemap32_map(), get_cubemap_face_map(), get_direction(), get_rotated_cubemap_map(), horizontal_frame_pack(), prepare_eac_in(), prepare_eac_out(), process_cube_coordinates(), sao_copy_hor(), sao_extends_edges(), sao_get_edges(), xyz_to_cube(), and xyz_to_tspyramid().

Function Documentation

cdg_decode_init()

static av_cold int cdg_decode_init ( AVCodecContext * avctx )

static

Definition at line 78 of file cdgraphics.c.

cdg_border_preset()

static void cdg_border_preset ( CDGraphicsContext * cc, uint8_t * data )

static

fill the top and bottom borders

fill the side borders

Definition at line 93 of file cdgraphics.c.

Referenced by cdg_decode_frame().

cdg_load_palette()

static void cdg_load_palette ( CDGraphicsContext * cc, uint8_t * data, int low )

static

Definition at line 115 of file cdgraphics.c.

Referenced by cdg_decode_frame().

cdg_tile_block()

static int cdg_tile_block ( CDGraphicsContext * cc, uint8_t * data, int b )

static

Definition at line 132 of file cdgraphics.c.

Referenced by cdg_decode_frame().

cdg_copy_rect_buf()

static void cdg_copy_rect_buf ( int out_tl_x, int out_tl_y, uint8_t * out, int in_tl_x, int in_tl_y, uint8_t * in, int w, int h, int stride )

static

Definition at line 171 of file cdgraphics.c.

Referenced by cdg_fill_wrapper().

cdg_fill_rect_preset()

static void cdg_fill_rect_preset ( int tl_x, int tl_y, uint8_t * out, int color, int w, int h, int stride )

static

Definition at line 183 of file cdgraphics.c.

Referenced by cdg_fill_wrapper().

cdg_fill_wrapper()

static void cdg_fill_wrapper ( int out_tl_x, int out_tl_y, uint8_t * out, int in_tl_x, int in_tl_y, uint8_t * in, int color, int w, int h, int stride, int roll )

static

Definition at line 192 of file cdgraphics.c.

Referenced by cdg_scroll().

cdg_scroll()

static void cdg_scroll ( CDGraphicsContext * cc, uint8_t * data, AVFrame * new_frame, int roll_over )

static

find the difference and save the offset for cdg_tile_block usage

Definition at line 204 of file cdgraphics.c.

Referenced by cdg_decode_frame().

cdg_decode_frame()

static int cdg_decode_frame ( AVCodecContext * avctx, AVFrame * frame, int * got_frame, AVPacket * avpkt )

static

Definition at line 266 of file cdgraphics.c.

cdg_decode_flush()

static av_cold void cdg_decode_flush ( AVCodecContext * avctx )

static

Definition at line 372 of file cdgraphics.c.

cdg_decode_end()

static av_cold int cdg_decode_end ( AVCodecContext * avctx )

static

Definition at line 385 of file cdgraphics.c.

Variable Documentation

ff_cdgraphics_decoder

const FFCodec ff_cdgraphics_decoder

Initial value:

= {
    .p.name         = "cdgraphics",
    CODEC_LONG_NAME("CD Graphics video"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_CDGRAPHICS,
    .priv_data_size = sizeof(CDGraphicsContext),
    .init           = cdg_decode_init,
    .close          = cdg_decode_end,
    FF_CODEC_DECODE_CB(cdg_decode_frame),
    .flush          = cdg_decode_flush,
    .p.capabilities = AV_CODEC_CAP_DR1,
}

Definition at line 394 of file cdgraphics.c.