tdsc.c File Reference

TDSC decoder. More...

#include <stdint.h>
#include <zlib.h>
#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	TDSCContext

Macros
#define	BITMAPINFOHEADER_SIZE   0x28
#define	TDSF_HEADER_SIZE   0x56
#define	TDSB_HEADER_SIZE   0x08
#define	APPLY_ALPHA(src, new, alpha)   src = (src * (256 - alpha) + new * alpha) >> 8

Enumerations
enum	TDSCCursorFormat { CUR_FMT_MONO = 0x01010004, CUR_FMT_BGRA = 0x20010004, CUR_FMT_RGBA = 0x20010008 }

Functions
static av_cold int	tdsc_close (AVCodecContext *avctx)
static av_cold int	tdsc_init (AVCodecContext *avctx)
static void	tdsc_paint_cursor (AVCodecContext *avctx, uint8_t *dst, int stride)
static int	tdsc_load_cursor (AVCodecContext *avctx)
static void	tdsc_yuv2rgb (uint8_t *out, int Y, int U, int V)
static av_always_inline void	tdsc_blit (uint8_t *dst, int dst_stride, const uint8_t *srcy, int srcy_stride, const uint8_t *srcu, const uint8_t *srcv, int srcuv_stride, int width, int height)
static int	tdsc_decode_jpeg_tile (AVCodecContext *avctx, int tile_size, int x, int y, int w, int h)
static int	tdsc_decode_tiles (AVCodecContext *avctx, int number_tiles)
static int	tdsc_parse_tdsf (AVCodecContext *avctx, int number_tiles)
static int	tdsc_parse_dtsm (AVCodecContext *avctx)
static int	tdsc_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)

Variables
AVCodec	ff_tdsc_decoder

Detailed Description

TDSC decoder.

Fourcc: TSDC

TDSC is very simple. It codes picture by tiles, storing them in raw BGR24 format or compressing them in JPEG. Frames can be full pictures or just updates to the previous frame. Cursor is found in its own frame or at the bottom of the picture. Every frame is then packed with zlib.

Supports: BGR24

Definition in file tdsc.c.

Macro Definition Documentation

#define BITMAPINFOHEADER_SIZE   0x28

Definition at line 45 of file tdsc.c.

Referenced by tdsc_parse_tdsf().

#define TDSF_HEADER_SIZE   0x56

Definition at line 46 of file tdsc.c.

Referenced by tdsc_decode_frame().

#define TDSB_HEADER_SIZE   0x08

Definition at line 47 of file tdsc.c.

Referenced by tdsc_decode_tiles().

#define APPLY_ALPHA	(		src,
			new,
			alpha
	)		src = (src * (256 - alpha) + new * alpha) >> 8

Definition at line 138 of file tdsc.c.

Referenced by tdsc_paint_cursor().

Enumeration Type Documentation

enum TDSCCursorFormat

Enumerator
CUR_FMT_MONO
CUR_FMT_BGRA
CUR_FMT_RGBA

Definition at line 71 of file tdsc.c.

Function Documentation

static av_cold int tdsc_close ( AVCodecContext *  avctx )

static

Definition at line 77 of file tdsc.c.

static av_cold int tdsc_init ( AVCodecContext *  avctx )

static

Definition at line 91 of file tdsc.c.

static void tdsc_paint_cursor ( AVCodecContext *  avctx, uint8_t *  dst, int  stride  )

static

Definition at line 142 of file tdsc.c.

Referenced by tdsc_decode_frame().

static int tdsc_load_cursor ( AVCodecContext *  avctx )

static

Definition at line 187 of file tdsc.c.

Referenced by tdsc_parse_dtsm().

static void tdsc_yuv2rgb ( uint8_t *  out, int  Y, int  U, int  V  )

inlinestatic

Definition at line 314 of file tdsc.c.

Referenced by tdsc_blit().

static av_always_inline void tdsc_blit ( uint8_t *  dst, int  dst_stride, const uint8_t *  srcy, int  srcy_stride, const uint8_t *  srcu, const uint8_t *  srcv, int  srcuv_stride, int  width, int  height  )

static

Definition at line 322 of file tdsc.c.

Referenced by tdsc_decode_jpeg_tile().

static int tdsc_decode_jpeg_tile ( AVCodecContext *  avctx, int  tile_size, int  x, int  y, int  w, int  h  )

static

Definition at line 341 of file tdsc.c.

Referenced by tdsc_decode_tiles().

static int tdsc_decode_tiles ( AVCodecContext *  avctx, int  number_tiles  )

static

Definition at line 384 of file tdsc.c.

Referenced by tdsc_parse_tdsf().

static int tdsc_parse_tdsf ( AVCodecContext *  avctx, int  number_tiles  )

static

Definition at line 453 of file tdsc.c.

Referenced by tdsc_decode_frame().

static int tdsc_parse_dtsm ( AVCodecContext *  avctx )

static

Definition at line 496 of file tdsc.c.

Referenced by tdsc_decode_frame().

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

static

Definition at line 523 of file tdsc.c.

Variable Documentation

AVCodec ff_tdsc_decoder

Initial value:

= {
    .name           = "tdsc",
    .long_name      = NULL_IF_CONFIG_SMALL("TDSC"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_TDSC,
    .init           = tdsc_init,
    .decode         = tdsc_decode_frame,
    .close          = tdsc_close,
    .priv_data_size = sizeof(TDSCContext),
    .capabilities   = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |
                      FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 618 of file tdsc.c.