libavcodec/snowdec.c File Reference

#include "libavutil/intmath.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "dsputil.h"
#include "dwt.h"
#include "snow.h"
#include "rangecoder.h"
#include "mathops.h"
#include "mpegvideo.h"
#include "h263.h"
#include <assert.h>

Go to the source code of this file.

Defines
#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 *data_size, AVPacket *avpkt)
static av_cold int	decode_end (AVCodecContext *avctx)
Variables
AVCodec	ff_snow_decoder

---

Define 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;

Definition at line 260 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 214 of file snowdec.c.

Referenced by decode_frame().

static int decode_blocks

(

SnowContext *

s

)

[static]

Definition at line 369 of file snowdec.c.

Referenced by decode_frame().

static av_cold int decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 547 of file snowdec.c.

static int decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		AVPacket *	avpkt
	)			[static]

Definition at line 384 of file snowdec.c.

static int decode_header

(

SnowContext *

s

)

[static]

Definition at line 268 of file snowdec.c.

Referenced by decode_frame().

static av_cold int decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 355 of file snowdec.c.

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

Definition at line 135 of file snowdec.c.

Referenced by decode_blocks().

static void decode_qlogs

(

SnowContext *

s

)

[static]

Definition at line 244 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]
	)			[inline, static]

Definition at line 94 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 191 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 38 of file snowdec.c.

Referenced by decode_frame().

---

Variable Documentation

AVCodec ff_snow_decoder

Initial value:

 {
    .name           = "snow",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = 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"),
}

Definition at line 558 of file snowdec.c.