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().

Initial value:

Definition at line 290 of file nuv.c.


Generated on Fri Oct 26 02:39:45 2012 for FFmpeg by  doxygen 1.5.8