libavcodec/nuv.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include "libavutil/bswap.h"
#include "libavutil/lzo.h"
#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "dsputil.h"
#include "rtjpeg.h"

Go to the source code of this file.

Data Structures
struct	NuvContext
Functions
static void	copy_frame (AVFrame *f, const uint8_t *src, int width, int height)
	copy frame data from buffer to AVFrame, handling stride.
static int	get_quant (AVCodecContext *avctx, NuvContext *c, const uint8_t *buf, int size)
	extract quantization tables from codec data into our context
static void	get_quant_quality (NuvContext *c, int quality)
	set quantization tables from a quality value
static int	codec_reinit (AVCodecContext *avctx, int width, int height, int quality)
static int	decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
static av_cold int	decode_init (AVCodecContext *avctx)
static av_cold int	decode_end (AVCodecContext *avctx)
Variables
static const uint8_t	fallback_lquant []
static const uint8_t	fallback_cquant []
AVCodec	ff_nuv_decoder

---

Function Documentation

static int codec_reinit	(	AVCodecContext *	avctx,
		int	width,
		int	height,
		int	quality
	)			[static]

Definition at line 109 of file nuv.c.

Referenced by decode_frame(), and decode_init().

static void copy_frame	(	AVFrame *	f,
		const uint8_t *	src,
		int	width,
		int	height
	)			[static]

copy frame data from buffer to AVFrame, handling stride.

Parameters:

	f	destination AVFrame
	src	source buffer, does not use any line-stride
	width	width of the video frame
	height	height of the video frame

Definition at line 73 of file nuv.c.

static av_cold int decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 282 of file nuv.c.

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

Definition at line 135 of file nuv.c.

static av_cold int decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 265 of file nuv.c.

static int get_quant	(	AVCodecContext *	avctx,
		NuvContext *	c,
		const uint8_t *	buf,
		int	size
	)			[static]

extract quantization tables from codec data into our context

Definition at line 83 of file nuv.c.

Referenced by decode_frame(), and decode_init().

static void get_quant_quality	(	NuvContext *	c,
		int	quality
	)			[static]

set quantization tables from a quality value

Definition at line 100 of file nuv.c.

Referenced by codec_reinit().

---

Variable Documentation

const uint8_t fallback_cquant[] [static]

Initial value:

 {
    17, 18, 24, 47, 99, 99, 99, 99,
    18, 21, 26, 66, 99, 99, 99, 99,
    24, 26, 56, 99, 99, 99, 99, 99,
    47, 66, 99, 99, 99, 99, 99, 99,
    99, 99, 99, 99, 99, 99, 99, 99,
    99, 99, 99, 99, 99, 99, 99, 99,
    99, 99, 99, 99, 99, 99, 99, 99,
    99, 99, 99, 99, 99, 99, 99, 99
}

Definition at line 55 of file nuv.c.

Referenced by get_quant_quality().

const uint8_t fallback_lquant[] [static]

Initial value:

 {
    16,  11,  10,  16,  24,  40,  51,  61,
    12,  12,  14,  19,  26,  58,  60,  55,
    14,  13,  16,  24,  40,  57,  69,  56,
    14,  17,  22,  29,  51,  87,  80,  62,
    18,  22,  37,  56,  68, 109, 103,  77,
    24,  35,  55,  64,  81, 104, 113,  92,
    49,  64,  78,  87, 103, 121, 120, 101,
    72,  92,  95,  98, 112, 100, 103,  99
}

Definition at line 44 of file nuv.c.

Referenced by get_quant_quality().

AVCodec ff_nuv_decoder

Initial value:

 {
    "nuv",
    AVMEDIA_TYPE_VIDEO,
    CODEC_ID_NUV,
    sizeof(NuvContext),
    decode_init,
    NULL,
    decode_end,
    decode_frame,
    CODEC_CAP_DR1,
    .long_name = NULL_IF_CONFIG_SMALL("NuppelVideo/RTJPEG"),
}

Definition at line 290 of file nuv.c.