clearvideo.c File Reference

ClearVideo decoder. More...

#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "idctdsp.h"
#include "internal.h"
#include "mathops.h"
#include "clearvideodata.h"

Classes
struct	LevelCodes
struct	MV
struct	MVInfo
struct	TileInfo
struct	CLVContext

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

Typedefs
typedef struct LevelCodes	LevelCodes
typedef struct MV	MV
typedef struct MVInfo	MVInfo
typedef struct TileInfo	TileInfo
typedef struct CLVContext	CLVContext

Variables
AVCodec	ff_clearvideo_decoder

Detailed Description

ClearVideo decoder.

Macro Definition Documentation

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;                            \

Variable Documentation

ff_clearvideo_decoder

AVCodec ff_clearvideo_decoder

Initial value:

= {
    .name           = "clearvideo",
    .long_name      = NULL_IF_CONFIG_SMALL("Iterated Systems ClearVideo"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_CLEARVIDEO,
    .priv_data_size = sizeof(CLVContext),
    .init           = clv_decode_init,
    .close          = clv_decode_end,
    .decode         = clv_decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
}