speedhqdec.c File Reference

#include "libavutil/attributes.h"
#include "libavutil/mem_internal.h"
#include "avcodec.h"
#include "blockdsp.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"
#include "idctdsp.h"
#include "libavutil/thread.h"
#include "mathops.h"
#include "mpeg12data.h"
#include "mpeg12vlc.h"
#include "speedhq.h"

Go to the source code of this file.

Data Structures
struct	SHQContext

Macros
#define	BITSTREAM_READER_LE
#define	MAX_INDEX   (64 - 1)
#define	ALPHA_VLC_BITS   5

Functions
static int	decode_dc_le (GetBitContext *gb, int component)
static int	decode_alpha_block (const SHQContext *s, GetBitContext *gb, uint8_t last_alpha[16], uint8_t *dest, int linesize)
static int	decode_dct_block (const SHQContext *s, GetBitContext *gb, int last_dc[4], int component, uint8_t *dest, int linesize)
static int	decode_speedhq_border (const SHQContext *s, GetBitContext *gb, AVFrame *frame, int field_number, int line_stride)
static int	decode_speedhq_field (const SHQContext *s, const uint8_t *buf, int buf_size, AVFrame *frame, int field_number, int start, int end, int line_stride)
static void	compute_quant_matrix (int *output, int qscale)
static int	speedhq_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
static av_cold void	compute_alpha_vlcs (void)
static av_cold void	speedhq_static_init (void)
static av_cold int	speedhq_decode_init (AVCodecContext *avctx)

Variables
static const uint8_t	unscaled_quant_matrix [64]
static VLCElem	dc_lum_vlc_le [512]
static VLCElem	dc_chroma_vlc_le [514]
static VLCElem	dc_alpha_run_vlc_le [160]
static VLCElem	dc_alpha_level_vlc_le [288]
static RL_VLC_ELEM	speedhq_rl_vlc [674]
const FFCodec	ff_speedhq_decoder

Detailed Description

NewTek SpeedHQ decoder.

Definition in file speedhqdec.c.

Macro Definition Documentation

BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 27 of file speedhqdec.c.

MAX_INDEX

#define MAX_INDEX   (64 - 1)

Definition at line 44 of file speedhqdec.c.

ALPHA_VLC_BITS

#define ALPHA_VLC_BITS   5

Definition at line 50 of file speedhqdec.c.

Function Documentation

decode_dc_le()

static int decode_dc_le ( GetBitContext *  gb, int  component  )

inlinestatic

Definition at line 81 of file speedhqdec.c.

Referenced by decode_dct_block().

decode_alpha_block()

static int decode_alpha_block ( const SHQContext *  s, GetBitContext *  gb, uint8_t  last_alpha[16], uint8_t *  dest, int  linesize  )

inlinestatic

Definition at line 98 of file speedhqdec.c.

Referenced by decode_speedhq_border(), and decode_speedhq_field().

decode_dct_block()

static int decode_dct_block ( const SHQContext *  s, GetBitContext *  gb, int  last_dc[4], int  component, uint8_t *  dest, int  linesize  )

inlinestatic

Definition at line 138 of file speedhqdec.c.

Referenced by decode_speedhq_border(), and decode_speedhq_field().

decode_speedhq_border()

static int decode_speedhq_border ( const SHQContext *  s, GetBitContext *  gb, AVFrame *  frame, int  field_number, int  line_stride  )

static

Definition at line 195 of file speedhqdec.c.

Referenced by decode_speedhq_field().

decode_speedhq_field()

static int decode_speedhq_field ( const SHQContext *  s, const uint8_t *  buf, int  buf_size, AVFrame *  frame, int  field_number, int  start, int  end, int  line_stride  )

static

Definition at line 268 of file speedhqdec.c.

Referenced by speedhq_decode_frame().

compute_quant_matrix()

static void compute_quant_matrix ( int *  output, int  qscale  )

static

Definition at line 400 of file speedhqdec.c.

Referenced by speedhq_decode_frame().

speedhq_decode_frame()

static int speedhq_decode_frame ( AVCodecContext *  avctx, AVFrame *  frame, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 406 of file speedhqdec.c.

compute_alpha_vlcs()

static av_cold void compute_alpha_vlcs ( void  )

static

Definition at line 469 of file speedhqdec.c.

Referenced by speedhq_static_init().

speedhq_static_init()

static av_cold void speedhq_static_init ( void  )

static

Definition at line 556 of file speedhqdec.c.

Referenced by speedhq_decode_init().

speedhq_decode_init()

static av_cold int speedhq_decode_init ( AVCodecContext *  avctx )

static

Definition at line 575 of file speedhqdec.c.

Variable Documentation

unscaled_quant_matrix

const uint8_t unscaled_quant_matrix[64]

static

Initial value:

= {
    16, 16, 19, 22, 26, 27, 29, 34,
    16, 16, 22, 24, 27, 29, 34, 37,
    19, 22, 26, 27, 29, 34, 34, 38,
    22, 22, 26, 27, 29, 34, 37, 40,
    22, 26, 27, 29, 32, 35, 40, 48,
    26, 27, 29, 32, 35, 40, 48, 58,
    26, 27, 29, 34, 38, 46, 56, 69,
    27, 29, 35, 38, 46, 56, 69, 83
}

Definition at line 63 of file speedhqdec.c.

Referenced by compute_quant_matrix().

dc_lum_vlc_le

VLCElem dc_lum_vlc_le[512]

static

Definition at line 74 of file speedhqdec.c.

Referenced by decode_dc_le(), and speedhq_static_init().

dc_chroma_vlc_le

VLCElem dc_chroma_vlc_le[514]

static

Definition at line 75 of file speedhqdec.c.

Referenced by decode_dc_le(), and speedhq_static_init().

dc_alpha_run_vlc_le

VLCElem dc_alpha_run_vlc_le[160]

static

Definition at line 76 of file speedhqdec.c.

Referenced by compute_alpha_vlcs(), and decode_alpha_block().

dc_alpha_level_vlc_le

VLCElem dc_alpha_level_vlc_le[288]

static

Definition at line 77 of file speedhqdec.c.

Referenced by compute_alpha_vlcs(), and decode_alpha_block().

speedhq_rl_vlc

RL_VLC_ELEM speedhq_rl_vlc[674]

static

Definition at line 79 of file speedhqdec.c.

Referenced by decode_dct_block(), and speedhq_static_init().

ff_speedhq_decoder

const FFCodec ff_speedhq_decoder

Initial value:

= {
    .p.name         = "speedhq",
    CODEC_LONG_NAME("NewTek SpeedHQ"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_SPEEDHQ,
    .priv_data_size = sizeof(SHQContext),
    .init           = speedhq_decode_init,
    FF_CODEC_DECODE_CB(speedhq_decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
}

Definition at line 644 of file speedhqdec.c.