clearvideo.c File Reference

#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"
#include "idctdsp.h"
#include "mathops.h"
#include "clearvideodata.h"

Go to the source code of this file.

Data Structures
struct	LevelCodes
struct	MV
struct	MVInfo
struct	CLVContext

Macros
#define	CLV_VLC_BITS   9
#define	DCT_TEMPLATE(blk, step, bias, shift, dshift, OP)
#define	ROP(x)   x
#define	COP(x)   (((x) + 4) >> 3)

Functions
static int	decode_block (CLVContext *ctx, int16_t *blk, int has_ac, int ac_quant)
static void	clv_dct (int16_t *block)
static int	decode_mb (CLVContext *c, int x, int y)
static int	copy_block (AVCodecContext *avctx, AVFrame *dst, const AVFrame *src, int plane, int x, int y, int dx, int dy, int size)
static int	copyadd_block (AVCodecContext *avctx, AVFrame *dst, const AVFrame *src, int plane, int x, int y, int dx, int dy, int size, int bias)
static MV *	mvi_predict (MVInfo *mvi, int mb_x, int mb_y)
static void	mvi_update_prediction (MV *mv, MV diff)
static void	mvi_reset (MVInfo *mvi, int mb_w, int mb_h, int mb_size)
static void	mvi_update_row (MVInfo *mvi)
static int	tile_do_block (AVCodecContext *avctx, AVFrame *dst, const AVFrame *src, int plane, int x, int y, int dx, int dy, int size, int bias)
static int	decode_tile (AVCodecContext *avctx, GetBitContext *gb, const LevelCodes *lc, AVFrame *dst, const AVFrame *src, int plane, int x, int y, int size, MV root_mv, MV *pred)
static void	extend_edges (AVFrame *buf, int tile_size)
static int	clv_decode_frame (AVCodecContext *avctx, AVFrame *rframe, int *got_frame, AVPacket *avpkt)
static const av_cold VLCElem *	build_vlc (VLCInitState *state, const uint8_t counts[16], const uint16_t **syms)
static av_cold void	clv_init_static (void)
static av_cold int	clv_decode_init (AVCodecContext *avctx)
static av_cold int	clv_decode_end (AVCodecContext *avctx)

Variables
static const MV	zero_mv = { 0 }
static VLCElem	dc_vlc [1104]
static VLCElem	ac_vlc [554]
static LevelCodes	lev [4+3+3]
const FFCodec	ff_clearvideo_decoder

Detailed Description

ClearVideo decoder

Definition in file clearvideo.c.

Macro Definition Documentation

CLV_VLC_BITS

#define CLV_VLC_BITS   9

Definition at line 40 of file clearvideo.c.

DCT_TEMPLATE

#define DCT_TEMPLATE	(		blk,
			step,
			bias,
			shift,
			dshift,
			OP
	)

Value:

    const int t0 = OP(2841 * blk[1 * step] +  565 * blk[7 * step]);     \
    const int t1 = OP( 565 * blk[1 * step] - 2841 * blk[7 * step]);     \
    const int t2 = OP(1609 * blk[5 * step] + 2408 * blk[3 * step]);     \
    const int t3 = OP(2408 * blk[5 * step] - 1609 * blk[3 * step]);     \
    const int t4 = OP(1108 * blk[2 * step] - 2676 * blk[6 * step]);     \
    const int t5 = OP(2676 * blk[2 * step] + 1108 * blk[6 * step]);     \
    const int t6 = ((blk[0 * step] + blk[4 * step]) * (1 << dshift)) + bias;  \
    const int t7 = ((blk[0 * step] - blk[4 * step]) * (1 << dshift)) + bias;  \
    const int t8 = t0 + t2;                                             \
    const int t9 = t0 - t2;                                             \
    const int tA = (int)(181U * (t9 + (t1 - t3)) + 0x80) >> 8;          \
    const int tB = (int)(181U * (t9 - (t1 - t3)) + 0x80) >> 8;          \
    const int tC = t1 + t3;                                             \
                                                                        \
    blk[0 * step] = (t6 + t5 + t8) >> shift;                            \
    blk[1 * step] = (t7 + t4 + tA) >> shift;                            \
    blk[2 * step] = (t7 - t4 + tB) >> shift;                            \
    blk[3 * step] = (t6 - t5 + tC) >> shift;                            \
    blk[4 * step] = (t6 - t5 - tC) >> shift;                            \
    blk[5 * step] = (t7 - t4 - tB) >> shift;                            \
    blk[6 * step] = (t7 + t4 - tA) >> shift;                            \
    blk[7 * step] = (t6 + t5 - t8) >> shift;                            \

Definition at line 126 of file clearvideo.c.

ROP

#define ROP

(

x

)

x

Definition at line 150 of file clearvideo.c.

COP

#define COP

(

x

)

(((x) + 4) >> 3)

Definition at line 151 of file clearvideo.c.

Function Documentation

decode_block()

static int decode_block ( CLVContext *  ctx, int16_t *  blk, int  has_ac, int  ac_quant  )

inlinestatic

Definition at line 82 of file clearvideo.c.

Referenced by decode_mb().

clv_dct()

static void clv_dct ( int16_t *  block )

static

Definition at line 153 of file clearvideo.c.

Referenced by decode_mb().

decode_mb()

static int decode_mb ( CLVContext *  c, int  x, int  y  )

static

Definition at line 171 of file clearvideo.c.

Referenced by clv_decode_frame().

copy_block()

static int copy_block ( AVCodecContext *  avctx, AVFrame *  dst, const AVFrame *  src, int  plane, int  x, int  y, int  dx, int  dy, int  size  )

static

Definition at line 218 of file clearvideo.c.

Referenced by clv_decode_frame(), and tile_do_block().

copyadd_block()

static int copyadd_block ( AVCodecContext *  avctx, AVFrame *  dst, const AVFrame *  src, int  plane, int  x, int  y, int  dx, int  dy, int  size, int  bias  )

static

Definition at line 255 of file clearvideo.c.

Referenced by tile_do_block().

mvi_predict()

static MV* mvi_predict ( MVInfo *  mvi, int  mb_x, int  mb_y  )

static

Definition at line 293 of file clearvideo.c.

Referenced by clv_decode_frame().

mvi_update_prediction()

static void mvi_update_prediction ( MV *  mv, MV  diff  )

static

Definition at line 339 of file clearvideo.c.

Referenced by decode_tile().

mvi_reset()

static void mvi_reset ( MVInfo *  mvi, int  mb_w, int  mb_h, int  mb_size  )

static

Definition at line 345 of file clearvideo.c.

Referenced by clv_decode_frame().

mvi_update_row()

static void mvi_update_row ( MVInfo *  mvi )

static

Definition at line 355 of file clearvideo.c.

Referenced by clv_decode_frame().

tile_do_block()

static int tile_do_block ( AVCodecContext *  avctx, AVFrame *  dst, const AVFrame *  src, int  plane, int  x, int  y, int  dx, int  dy, int  size, int  bias  )

static

Definition at line 365 of file clearvideo.c.

Referenced by decode_tile().

decode_tile()

static int decode_tile ( AVCodecContext *  avctx, GetBitContext *  gb, const LevelCodes *  lc, AVFrame *  dst, const AVFrame *  src, int  plane, int  x, int  y, int  size, MV  root_mv, MV *  pred  )

static

Definition at line 379 of file clearvideo.c.

Referenced by clv_decode_frame().

extend_edges()

static void extend_edges ( AVFrame *  buf, int  tile_size  )

static

Definition at line 444 of file clearvideo.c.

Referenced by clv_decode_frame().

clv_decode_frame()

static int clv_decode_frame ( AVCodecContext *  avctx, AVFrame *  rframe, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 483 of file clearvideo.c.

build_vlc()

static const av_cold VLCElem* build_vlc ( VLCInitState *  state, const uint8_t  counts[16], const uint16_t **  syms  )

static

Definition at line 625 of file clearvideo.c.

Referenced by clv_init_static().

clv_init_static()

static av_cold void clv_init_static ( void  )

static

Definition at line 645 of file clearvideo.c.

Referenced by clv_decode_init().

clv_decode_init()

static av_cold int clv_decode_init ( AVCodecContext *  avctx )

static

Definition at line 678 of file clearvideo.c.

clv_decode_end()

static av_cold int clv_decode_end ( AVCodecContext *  avctx )

static

Definition at line 728 of file clearvideo.c.

Variable Documentation

zero_mv

const MV zero_mv = { 0 }

static

Definition at line 52 of file clearvideo.c.

Referenced by mvi_predict().

dc_vlc

VLCElem dc_vlc[1104]

static

Definition at line 79 of file clearvideo.c.

Referenced by clv_init_static(), decode_block(), and lead_decode_frame().

ac_vlc

VLCElem ac_vlc[554]

static

Definition at line 79 of file clearvideo.c.

Referenced by clv_init_static(), decode_block(), and lead_decode_frame().

lev

LevelCodes lev[4+3+3]

static

Definition at line 80 of file clearvideo.c.

Referenced by clv_decode_frame(), clv_init_static(), decode_block(), dwt_decode53(), dwt_decode97_float(), dwt_decode97_int(), dwt_encode53(), dwt_encode97_float(), dwt_encode97_int(), ff_atrac_gain_compensation(), ff_jpeg2000_dwt_init(), hqx_get_ac(), init_quantization(), makelayers(), and truncpasses().

ff_clearvideo_decoder

const FFCodec ff_clearvideo_decoder

Initial value:

= {
    .p.name         = "clearvideo",
    CODEC_LONG_NAME("Iterated Systems ClearVideo"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_CLEARVIDEO,
    .priv_data_size = sizeof(CLVContext),
    .init           = clv_decode_init,
    .close          = clv_decode_end,
    FF_CODEC_DECODE_CB(clv_decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 740 of file clearvideo.c.