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"

Go to the source code of this file.

Data Structures
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)

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, 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 int	clv_decode_init (AVCodecContext *avctx)
static av_cold int	clv_decode_end (AVCodecContext *avctx)

Variables
static const MV	zero_mv = { 0 }
AVCodec	ff_clearvideo_decoder

Detailed Description

ClearVideo decoder.

Definition in file clearvideo.c.

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;                            \

Definition at line 130 of file clearvideo.c.

Referenced by clv_dct().

ROP

#define ROP

(

x

)

x

Definition at line 154 of file clearvideo.c.

Referenced by clv_dct().

COP

#define COP

(

x

)

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

Definition at line 155 of file clearvideo.c.

Referenced by clv_dct().

Function Documentation

decode_block()

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

inlinestatic

Definition at line 83 of file clearvideo.c.

Referenced by decode_mb().

clv_dct()

static void clv_dct ( int16_t *  block )

static

Definition at line 157 of file clearvideo.c.

Referenced by decode_mb().

decode_mb()

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

static

Definition at line 175 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 222 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 258 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 296 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 342 of file clearvideo.c.

Referenced by clv_decode_frame().

mvi_update_row()

static void mvi_update_row ( MVInfo *  mvi )

static

Definition at line 352 of file clearvideo.c.

Referenced by clv_decode_frame().

decode_tile_info()

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

static

Definition at line 362 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 415 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 429 of file clearvideo.c.

Referenced by clv_decode_frame().

extend_edges()

static void extend_edges ( AVFrame *  buf, int  tile_size  )

static

Definition at line 460 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 499 of file clearvideo.c.

clv_decode_init()

static av_cold int clv_decode_init ( AVCodecContext *  avctx )

static

Definition at line 646 of file clearvideo.c.

clv_decode_end()

static av_cold int clv_decode_end ( AVCodecContext *  avctx )

static

Definition at line 872 of file clearvideo.c.

Variable Documentation

zero_mv

const MV zero_mv = { 0 }

static

Definition at line 47 of file clearvideo.c.

Referenced by mvi_predict().

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 901 of file clearvideo.c.