scpr.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	RangeCoder
struct	PixelModel
struct	SCPRContext

Macros
#define	TOP   0x01000000
#define	BOT   0x010000

Functions
static void	init_rangecoder (RangeCoder *rc, GetByteContext *gb)
static void	reinit_tables (SCPRContext *s)
static int	decode (GetByteContext *gb, RangeCoder *rc, unsigned cumFreq, unsigned freq, unsigned total_freq)
static int	get_freq (RangeCoder *rc, unsigned total_freq, unsigned *freq)
static int	decode0 (GetByteContext *gb, RangeCoder *rc, unsigned cumFreq, unsigned freq, unsigned total_freq)
static int	get_freq0 (RangeCoder *rc, unsigned total_freq, unsigned *freq)
static int	decode_value (SCPRContext *s, unsigned *cnt, unsigned maxc, unsigned step, unsigned *rval)
static int	decode_unit (SCPRContext *s, PixelModel *pixel, unsigned step, unsigned *rval)
static int	decompress_i (AVCodecContext *avctx, uint32_t *dst, int linesize)
static int	decompress_p (AVCodecContext *avctx, uint32_t *dst, int linesize, uint32_t *prev, int plinesize)
static int	decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	decode_init (AVCodecContext *avctx)
static av_cold int	decode_close (AVCodecContext *avctx)

Variables
AVCodec	ff_scpr_decoder

Macro Definition Documentation

TOP

#define TOP   0x01000000

Definition at line 31 of file scpr.c.

Referenced by decode(), and decode0().

BOT

#define BOT   0x010000

Definition at line 32 of file scpr.c.

Referenced by decode_unit(), and decode_value().

Function Documentation

init_rangecoder()

static void init_rangecoder ( RangeCoder *  rc, GetByteContext *  gb  )

static

Definition at line 69 of file scpr.c.

Referenced by decompress_i(), and decompress_p().

reinit_tables()

static void reinit_tables ( SCPRContext *  s )

static

Definition at line 76 of file scpr.c.

Referenced by decompress_i().

decode()

static int decode ( GetByteContext *  gb, RangeCoder *  rc, unsigned  cumFreq, unsigned  freq, unsigned  total_freq  )

static

Definition at line 133 of file scpr.c.

Referenced by decode_frame().

get_freq()

static int get_freq ( RangeCoder *  rc, unsigned  total_freq, unsigned *  freq  )

static

Definition at line 147 of file scpr.c.

Referenced by decode_frame().

decode0()

static int decode0 ( GetByteContext *  gb, RangeCoder *  rc, unsigned  cumFreq, unsigned  freq, unsigned  total_freq  )

static

Definition at line 162 of file scpr.c.

Referenced by decode_frame(), and decode_init().

get_freq0()

static int get_freq0 ( RangeCoder *  rc, unsigned  total_freq, unsigned *  freq  )

static

Definition at line 184 of file scpr.c.

Referenced by decode_frame(), and decode_init().

decode_value()

static int decode_value ( SCPRContext *  s, unsigned *  cnt, unsigned  maxc, unsigned  step, unsigned *  rval  )

static

Definition at line 194 of file scpr.c.

Referenced by decompress_i(), and decompress_p().

decode_unit()

static int decode_unit ( SCPRContext *  s, PixelModel *  pixel, unsigned  step, unsigned *  rval  )

static

Definition at line 238 of file scpr.c.

Referenced by decompress_i(), and decompress_p().

decompress_i()

static int decompress_i ( AVCodecContext *  avctx, uint32_t *  dst, int  linesize  )

static

Definition at line 300 of file scpr.c.

Referenced by decode_frame().

decompress_p()

static int decompress_p ( AVCodecContext *  avctx, uint32_t *  dst, int  linesize, uint32_t *  prev, int  plinesize  )

static

Definition at line 505 of file scpr.c.

Referenced by decode_frame().

decode_frame()

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

static

Definition at line 752 of file scpr.c.

decode_init()

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 868 of file scpr.c.

decode_close()

static av_cold int decode_close ( AVCodecContext *  avctx )

static

Definition at line 901 of file scpr.c.

Variable Documentation

ff_scpr_decoder

AVCodec ff_scpr_decoder

Initial value:

= {
    .name             = "scpr",
    .long_name        = NULL_IF_CONFIG_SMALL("ScreenPressor"),
    .type             = AVMEDIA_TYPE_VIDEO,
    .id               = AV_CODEC_ID_SCPR,
    .priv_data_size   = sizeof(SCPRContext),
    .init             = decode_init,
    .close            = decode_close,
    .decode           = decode_frame,
    .capabilities     = AV_CODEC_CAP_DR1,
    .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE |
                        FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 912 of file scpr.c.