FFmpeg
Macros | Functions | Variables
snowdec.c File Reference
#include "libavutil/intmath.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "snow_dwt.h"
#include "internal.h"
#include "snow.h"
#include "rangecoder.h"
#include "mathops.h"
#include "mpegvideo.h"
#include "h263.h"

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 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);\
}\
dst= tmp;
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
Definition: ffv1dec.c:65
#define s(width, name)
Definition: cbs_vp9.c:257
if(ret)
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 For filters that do not use the this method is called when a frame is wanted on an output For a 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 or at least make progress towards producing a it should return
#define check(x, y, S, v)
static uint8_t tmp[11]
Definition: aes_ctr.c:26

Definition at line 294 of file snowdec.c.

Referenced by decode_header().

Function Documentation

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 35 of file snowdec.c.

Referenced by decode_frame().

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 117 of file snowdec.c.

Referenced by decode_frame().

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

Definition at line 158 of file snowdec.c.

Referenced by decode_blocks().

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 225 of file snowdec.c.

Referenced by decode_frame().

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 248 of file snowdec.c.

Referenced by decode_frame().

static void decode_qlogs ( SnowContext s)
static

Definition at line 278 of file snowdec.c.

Referenced by decode_header().

static int decode_header ( SnowContext s)
static

Definition at line 302 of file snowdec.c.

Referenced by decode_frame().

static int decode_blocks ( SnowContext s)
static

Definition at line 425 of file snowdec.c.

Referenced by decode_frame().

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

Definition at line 442 of file snowdec.c.

static av_cold int decode_end ( AVCodecContext avctx)
static

Definition at line 640 of file snowdec.c.

Variable Documentation

AVCodec ff_snow_decoder
Initial value:
= {
.name = "snow",
.long_name = NULL_IF_CONFIG_SMALL("Snow"),
.priv_data_size = sizeof(SnowContext),
.close = decode_end,
.capabilities = AV_CODEC_CAP_DR1 ,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
}
#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
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static av_cold int decode_end(AVCodecContext *avctx)
Definition: snowdec.c:640
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: snowdec.c:442
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
#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
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
int ff_snow_common_init(AVCodecContext *avctx)
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50

Definition at line 651 of file snowdec.c.