fraps.c File Reference

Lossless Fraps 'FPS1' decoder. More...

#include "config.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "get_bits.h"
#include "huffman.h"
#include "bytestream.h"
#include "bswapdsp.h"
#include "codec_internal.h"
#include "thread.h"

Go to the source code of this file.

Data Structures
struct	FrapsContext
	local variable storage More...

Macros
#define	CACHED_BITSTREAM_READER   HAVE_FAST_64BIT
#define	UNCHECKED_BITSTREAM_READER   1
#define	FPS_TAG   MKTAG('F', 'P', 'S', 'x')
#define	VLC_BITS   11

Functions
static av_cold int	decode_init (AVCodecContext *avctx)
	initializes decoder
static int	huff_cmp (const void *va, const void *vb)
	Comparator - our nodes should ascend by count but with preserved symbol order.
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
static int	decode_frame (AVCodecContext *avctx, AVFrame *f, int *got_frame, AVPacket *avpkt)
static av_cold int	decode_end (AVCodecContext *avctx)
	closes decoder

Variables
const FFCodec	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

CACHED_BITSTREAM_READER

#define CACHED_BITSTREAM_READER   HAVE_FAST_64BIT

Definition at line 36 of file fraps.c.

UNCHECKED_BITSTREAM_READER

#define UNCHECKED_BITSTREAM_READER   1

Definition at line 37 of file fraps.c.

FPS_TAG

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

Definition at line 47 of file fraps.c.

Referenced by decode_frame().

VLC_BITS

#define VLC_BITS   11

Definition at line 48 of file fraps.c.

Function Documentation

decode_init()

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 65 of file fraps.c.

huff_cmp()

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 81 of file fraps.c.

Referenced by fraps2_decode_plane().

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 90 of file fraps.c.

Referenced by decode_frame().

decode_frame()

static int decode_frame ( AVCodecContext * avctx, AVFrame * f, int * got_frame, AVPacket * avpkt )

static

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

Definition at line 136 of file fraps.c.

decode_end()

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 328 of file fraps.c.

Variable Documentation

ff_fraps_decoder

const FFCodec ff_fraps_decoder

Initial value:

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

Definition at line 336 of file fraps.c.