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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

#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; \
shift
static int shift(int a, int b)
Definition: sonic.c:82
t9
#define t9
Definition: regdef.h:54
t8
#define t8
Definition: regdef.h:53
blk
#define blk(i)
Definition: sha.c:185
t7
#define t7
Definition: regdef.h:35
t0
#define t0
Definition: regdef.h:28
U
#define U(x)
Definition: vp56_arith.h:37
t1
#define t1
Definition: regdef.h:29
t3
#define t3
Definition: regdef.h:31
OP
#define OP(LOAD, STORE)
Definition: hpeldsp_alpha.c:55
t5
#define t5
Definition: regdef.h:33
int
int
Definition: ffmpeg_filter.c:191
t6
#define t6
Definition: regdef.h:34
t4
#define t4
Definition: regdef.h:32
t2
#define t2
Definition: regdef.h:30

Definition at line 130 of file clearvideo.c.

Referenced by clv_dct().

#define ROP (   x)    x

Definition at line 154 of file clearvideo.c.

Referenced by clv_dct().

#define COP (   x)    (((x) + 4) >> 3)

Definition at line 155 of file clearvideo.c.

Referenced by clv_dct().

Function Documentation

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().

static void clv_dct ( int16_t *  block)
static

Definition at line 157 of file clearvideo.c.

Referenced by 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().

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().

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().

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().

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().

static void mvi_update_row ( MVInfo *  mvi)
static

Definition at line 352 of file clearvideo.c.

Referenced by clv_decode_frame().

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().

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().

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().

static void extend_edges ( AVFrame *  buf,
int  tile_size 
)
static

Definition at line 460 of file clearvideo.c.

Referenced by 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.

static av_cold int clv_decode_init ( AVCodecContext *  avctx)
static

Definition at line 646 of file clearvideo.c.

static av_cold int clv_decode_end ( AVCodecContext *  avctx)
static

Definition at line 872 of file clearvideo.c.

Variable Documentation

const MV zero_mv = { 0 }
static

Definition at line 47 of file clearvideo.c.

Referenced by mvi_predict().

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,
}
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
clv_decode_init
static av_cold int clv_decode_init(AVCodecContext *avctx)
Definition: clearvideo.c:646
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
clv_decode_end
static av_cold int clv_decode_end(AVCodecContext *avctx)
Definition: clearvideo.c:872
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:40
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
clv_decode_frame
static int clv_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: clearvideo.c:499
AV_CODEC_ID_CLEARVIDEO
Definition: avcodec.h:441
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:968

Definition at line 901 of file clearvideo.c.

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