nuv.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include "libavutil/bswap.h"
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/lzo.h"
#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "idctdsp.h"
#include "internal.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. More...
static int	get_quant (AVCodecContext *avctx, NuvContext *c, const uint8_t *buf, int size)
	extract quantization tables from codec data into our context More...
static void	get_quant_quality (NuvContext *c, int quality)
	set quantization tables from a quality value More...
static int	codec_reinit (AVCodecContext *avctx, int width, int height, int quality)
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_end (AVCodecContext *avctx)

Variables
static const uint8_t	fallback_lquant []
static const uint8_t	fallback_cquant []
AVCodec	ff_nuv_decoder

Function Documentation

copy_frame()

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 76 of file nuv.c.

Referenced by decode_frame().

get_quant()

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 89 of file nuv.c.

Referenced by decode_frame(), and decode_init().

get_quant_quality()

static void get_quant_quality ( NuvContext *  c, int  quality  )

static

set quantization tables from a quality value

Definition at line 107 of file nuv.c.

Referenced by codec_reinit().

codec_reinit()

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

static

Definition at line 117 of file nuv.c.

Referenced by decode_frame(), and decode_init().

decode_frame()

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

static

Definition at line 154 of file nuv.c.

decode_init()

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 327 of file nuv.c.

decode_end()

static av_cold int decode_end ( AVCodecContext *  avctx )

static

Definition at line 355 of file nuv.c.

Variable Documentation

fallback_lquant

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 47 of file nuv.c.

Referenced by get_quant_quality().

fallback_cquant

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 58 of file nuv.c.

Referenced by get_quant_quality().

ff_nuv_decoder

AVCodec ff_nuv_decoder

Initial value:

= {
    .name           = "nuv",
    .long_name      = NULL_IF_CONFIG_SMALL("NuppelVideo/RTJPEG"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_NUV,
    .priv_data_size = sizeof(NuvContext),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 365 of file nuv.c.