fraps.c File Reference

Lossless Fraps 'FPS1' decoder. More...

#include "avcodec.h"
#include "get_bits.h"
#include "huffman.h"
#include "bytestream.h"
#include "bswapdsp.h"
#include "internal.h"
#include "thread.h"

Go to the source code of this file.

Data Structures
struct	FrapsContext
	local variable storage More...

Macros
#define	FPS_TAG   MKTAG('F', 'P', 'S', 'x')
#define	VLC_BITS   11

Functions
static av_cold int	decode_init (AVCodecContext *avctx)
	initializes decoder More...
static int	huff_cmp (const void *va, const void *vb)
	Comparator - our nodes should ascend by count but with preserved symbol order. More...
static int	fraps2_decode_plane (FrapsContext *s, uint8_t *dst, int stride, int w, int h, const uint8_t *src, int size, int Uoff, const int step)
	decode Fraps v2 packed plane More...
static int	decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	decode_end (AVCodecContext *avctx)
	closes decoder More...

Variables
AVCodec	ff_fraps_decoder

Detailed Description

Lossless Fraps 'FPS1' decoder.

Author

Roine Gustafsson (roine at users sf net)

Konstantin Shishkov

Codec algorithm for version 0 is taken from Transcode <www.transcoding.org>

Version 2 files support by Konstantin Shishkov

Definition in file fraps.c.

Macro Definition Documentation

#define FPS_TAG   MKTAG('F', 'P', 'S', 'x')

Definition at line 42 of file fraps.c.

Referenced by decode_frame().

#define VLC_BITS   11

Definition at line 43 of file fraps.c.

Referenced by fraps2_decode_plane().

Function Documentation

static av_cold int decode_init ( AVCodecContext *  avctx )

static

initializes decoder

Parameters

avctx

codec context

Returns

0 on success or negative if fails

Definition at line 61 of file fraps.c.

static int huff_cmp ( const void *  va, const void *  vb  )

static

Comparator - our nodes should ascend by count but with preserved symbol order.

Definition at line 77 of file fraps.c.

Referenced by fraps2_decode_plane().

static int fraps2_decode_plane ( FrapsContext *  s, uint8_t *  dst, int  stride, int  w, int  h, const uint8_t *  src, int  size, int  Uoff, const int  step  )

static

decode Fraps v2 packed plane

Definition at line 86 of file fraps.c.

Referenced by decode_frame().

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

static

Fraps v2 is Huffman-coded YUV420 planes Fraps v4 is virtually the same

Definition at line 132 of file fraps.c.

static av_cold int decode_end ( AVCodecContext *  avctx )

static

closes decoder

Parameters

avctx

codec context

Returns

0 on success or negative if fails

Definition at line 309 of file fraps.c.

Variable Documentation

AVCodec ff_fraps_decoder

Initial value:

= {
    .name           = "fraps",
    .long_name      = NULL_IF_CONFIG_SMALL("Fraps"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_FRAPS,
    .priv_data_size = sizeof(FrapsContext),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
}

Definition at line 318 of file fraps.c.