clearvideo.c File Reference

ClearVideo decoder. More...

#include "libavutil/mem_internal.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "idctdsp.h"
#include "internal.h"
#include "mathops.h"
#include "clearvideodata.h"

Go to the source code of this file.

Data Structures
struct	LevelCodes
struct	MV
struct	MVInfo
struct	TileInfo
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, AVFrame *src, int plane, int x, int y, int dx, int dy, int size)
static int	copyadd_block (AVCodecContext *avctx, AVFrame *dst, 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, 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 TileInfo *	decode_tile_info (GetBitContext *gb, const LevelCodes *lc, int level)
static int	tile_do_block (AVCodecContext *avctx, AVFrame *dst, AVFrame *src, int plane, int x, int y, int dx, int dy, int size, int bias)
static int	restore_tree (AVCodecContext *avctx, AVFrame *dst, AVFrame *src, int plane, int x, int y, int size, TileInfo *tile, MV root_mv)
static void	extend_edges (AVFrame *buf, int tile_size)
static int	clv_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold void	build_vlc (VLC *vlc, const uint8_t counts[16], const uint16_t **syms, unsigned *offset)
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 VLC	dc_vlc
static VLC	ac_vlc
static LevelCodes	lev [4+3+3]
static VLC_TYPE	vlc_buf [16716][2]
AVCodec	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 38 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 132 of file clearvideo.c.

ROP

#define ROP

(

x

)

x

Definition at line 156 of file clearvideo.c.

COP

#define COP

(

x

)

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

Definition at line 157 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 88 of file clearvideo.c.

Referenced by decode_mb().

clv_dct()

static void clv_dct ( int16_t *  block )

static

Definition at line 159 of file clearvideo.c.

Referenced by decode_mb().

decode_mb()

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

static

Definition at line 177 of file clearvideo.c.

Referenced by clv_decode_frame().

copy_block()

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

static

Definition at line 224 of file clearvideo.c.

Referenced by clv_decode_frame(), and tile_do_block().

copyadd_block()

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

static

Definition at line 260 of file clearvideo.c.

Referenced by tile_do_block().

mvi_predict()

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

static

Definition at line 298 of file clearvideo.c.

Referenced by clv_decode_frame().

mvi_reset()

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

static

Definition at line 344 of file clearvideo.c.

Referenced by clv_decode_frame().

mvi_update_row()

static void mvi_update_row ( MVInfo *  mvi )

static

Definition at line 354 of file clearvideo.c.

Referenced by clv_decode_frame().

decode_tile_info()

static TileInfo* decode_tile_info ( GetBitContext *  gb, const LevelCodes *  lc, int  level  )

static

Definition at line 364 of file clearvideo.c.

Referenced by clv_decode_frame().

tile_do_block()

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

static

Definition at line 417 of file clearvideo.c.

Referenced by restore_tree().

restore_tree()

static int restore_tree ( AVCodecContext *  avctx, AVFrame *  dst, AVFrame *  src, int  plane, int  x, int  y, int  size, TileInfo *  tile, MV  root_mv  )

static

Definition at line 431 of file clearvideo.c.

Referenced by clv_decode_frame().

extend_edges()

static void extend_edges ( AVFrame *  buf, int  tile_size  )

static

Definition at line 462 of file clearvideo.c.

Referenced by clv_decode_frame().

clv_decode_frame()

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

static

Definition at line 501 of file clearvideo.c.

build_vlc()

static av_cold void build_vlc ( VLC *  vlc, const uint8_t  counts[16], const uint16_t **  syms, unsigned *  offset  )

static

Definition at line 653 of file clearvideo.c.

Referenced by clv_init_static().

clv_init_static()

static av_cold void clv_init_static ( void  )

static

Definition at line 674 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 707 of file clearvideo.c.

clv_decode_end()

static av_cold int clv_decode_end ( AVCodecContext *  avctx )

static

Definition at line 757 of file clearvideo.c.

Variable Documentation

zero_mv

const MV zero_mv = { 0 }

static

Definition at line 50 of file clearvideo.c.

Referenced by clv_decode_frame(), and mvi_predict().

dc_vlc

VLC dc_vlc

static

Definition at line 84 of file clearvideo.c.

Referenced by clv_init_static(), and decode_block().

ac_vlc

VLC ac_vlc

static

Definition at line 84 of file clearvideo.c.

Referenced by clv_init_static(), and decode_block().

lev

LevelCodes lev[4+3+3]

static

Definition at line 85 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(), tag_tree_update(), and truncpasses().

vlc_buf

VLC_TYPE vlc_buf[16716][2]

static

Definition at line 86 of file clearvideo.c.

Referenced by aac_static_table_init(), atrac9_init_vlc(), build_vlc(), clv_init_static(), init_static(), mobiclip_init_static(), mpeg4_init_static(), mss4_init_vlc(), rv40_init_table(), tscc2_init_vlc(), and x8_init_vlc().

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,
}

Definition at line 769 of file clearvideo.c.