libavcodec/fraps.c File Reference

Lossless Fraps 'FPS1' decoder. More...

#include "avcodec.h"
#include "get_bits.h"
#include "huffman.h"
#include "bytestream.h"
#include "dsputil.h"

Go to the source code of this file.

Data Structures
struct	FrapsContext
	local variable storage More...
Defines
#define	FPS_TAG   MKTAG('F', 'P', 'S', 'x')
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, void *data, int *data_size, AVPacket *avpkt)
static av_cold int	decode_end (AVCodecContext *avctx)
	closes decoder
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.

---

Define Documentation

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

Definition at line 40 of file fraps.c.

Referenced by decode_frame().

---

Function Documentation

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 355 of file fraps.c.

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

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

Definition at line 126 of file fraps.c.

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 59 of file fraps.c.

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 huff_cmp	(	const void *	va,
		const void *	vb
	)			[static]

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

Definition at line 78 of file fraps.c.

Referenced by build_huff(), and fraps2_decode_plane().

---

Variable Documentation

AVCodec ff_fraps_decoder

Initial value:

 {
    .name           = "fraps",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = CODEC_ID_FRAPS,
    .priv_data_size = sizeof(FrapsContext),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .long_name = NULL_IF_CONFIG_SMALL("Fraps"),
}

Definition at line 367 of file fraps.c.