Macros | Functions | Variables
snowdec.c File Reference
#include "libavutil/intmath.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "dsputil.h"
#include "snow_dwt.h"
#include "internal.h"
#include "snow.h"
#include "rangecoder.h"
#include "mathops.h"
#include "mpegvideo.h"
#include "h263.h"
#include <assert.h>
Include dependency graph for snowdec.c:

Go to the source code of this file.

Macros

#define GET_S(dst, check)
 

Functions

static av_always_inline void predict_slice_buffered (SnowContext *s, slice_buffer *sb, IDWTELEM *old_buffer, int plane_index, int add, int mb_y)
 
static void decode_subband_slice_buffered (SnowContext *s, SubBand *b, slice_buffer *sb, int start_y, int h, int save_state[1])
 
static int decode_q_branch (SnowContext *s, int level, int x, int y)
 
static void dequantize_slice_buffered (SnowContext *s, slice_buffer *sb, SubBand *b, IDWTELEM *src, int stride, int start_y, int end_y)
 
static void correlate_slice_buffered (SnowContext *s, slice_buffer *sb, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median, int start_y, int end_y)
 
static void decode_qlogs (SnowContext *s)
 
static int decode_header (SnowContext *s)
 
static av_cold int decode_init (AVCodecContext *avctx)
 
static int decode_blocks (SnowContext *s)
 
static int decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
 
static av_cold int decode_end (AVCodecContext *avctx)
 

Variables

AVCodec ff_snow_decoder
 

Macro Definition Documentation

#define GET_S (   dst,
  check 
)
Value:
tmp= get_symbol(&s->c, s->header_state, 0);\
if(!(check)){\
av_log(s->avctx, AV_LOG_ERROR, "Error " #dst " is %d\n", tmp);\
return -1;\
}\
dst= tmp;
s
const char * s
Definition: avisynth_c.h:668
if
initialize output if(nPeaks >3)%at least 3 peaks in spectrum for trying to find f0 nf0peaks
av_log
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:246
get_symbol
static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
Definition: ffv1dec.c:63
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:148
dst
else dst[i][x+y *dst_stride[i]]
Definition: vf_mcdeint.c:160
return
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame This method is called when a frame is wanted on an output For an it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return it should return
Definition: filter_design.txt:216
check
#define check(x, y, S, v)
Definition: motion_est_template.c:402

Definition at line 262 of file snowdec.c.

Referenced by decode_header().

Function Documentation

static void correlate_slice_buffered ( SnowContext *  s,
slice_buffer *  sb,
SubBand *  b,
IDWTELEM *  src,
int  stride,
int  inverse,
int  use_median,
int  start_y,
int  end_y 
)
static

Definition at line 216 of file snowdec.c.

Referenced by decode_frame().

static int decode_blocks ( SnowContext *  s)
static

Definition at line 379 of file snowdec.c.

Referenced by decode_frame().

static av_cold int decode_end ( AVCodecContext *  avctx)
static

Definition at line 566 of file snowdec.c.

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

Definition at line 394 of file snowdec.c.

static int decode_header ( SnowContext *  s)
static

Definition at line 270 of file snowdec.c.

Referenced by decode_frame().

static av_cold int decode_init ( AVCodecContext *  avctx)
static

Definition at line 367 of file snowdec.c.

static int decode_q_branch ( SnowContext *  s,
int  level,
int  x,
int  y 
)
static

Definition at line 137 of file snowdec.c.

Referenced by decode_blocks().

static void decode_qlogs ( SnowContext *  s)
static

Definition at line 246 of file snowdec.c.

Referenced by decode_header().

static void decode_subband_slice_buffered ( SnowContext *  s,
SubBand *  b,
slice_buffer *  sb,
int  start_y,
int  h,
int  save_state[1] 
)
inlinestatic

Definition at line 96 of file snowdec.c.

Referenced by decode_frame().

static void dequantize_slice_buffered ( SnowContext *  s,
slice_buffer *  sb,
SubBand *  b,
IDWTELEM *  src,
int  stride,
int  start_y,
int  end_y 
)
static

Definition at line 193 of file snowdec.c.

Referenced by decode_frame().

static av_always_inline void predict_slice_buffered ( SnowContext *  s,
slice_buffer *  sb,
IDWTELEM *  old_buffer,
int  plane_index,
int  add,
int  mb_y 
)
static

Definition at line 39 of file snowdec.c.

Referenced by decode_frame().

Variable Documentation

AVCodec ff_snow_decoder
Initial value:
= {
.name = "snow",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_SNOW,
.priv_data_size = sizeof(SnowContext),
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
.capabilities = CODEC_CAP_DR1 ,
.long_name = NULL_IF_CONFIG_SMALL("Snow"),
}
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
decode_end
static av_cold int decode_end(AVCodecContext *avctx)
Definition: snowdec.c:566
decode_frame
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: snowdec.c:394
CODEC_CAP_DR1
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: libavcodec/avcodec.h:743
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: libavutil/internal.h:123
decode_init
static av_cold int decode_init(AVCodecContext *avctx)
Definition: snowdec.c:367
SnowContext
struct SnowContext SnowContext
close
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:375
AV_CODEC_ID_SNOW
Definition: libavcodec/avcodec.h:294
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:143
decode
static int decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: crystalhd.c:868

Definition at line 577 of file snowdec.c.

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