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libavcodec
hqx.h
Go to the documentation of this file.
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/*
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* Canopus HQX decoder
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_HQX_H
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#define AVCODEC_HQX_H
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#include <stdint.h>
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#include "
libavutil/frame.h
"
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#include "
libavutil/mem.h
"
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#include "
get_bits.h
"
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#include "
hqxdsp.h
"
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enum
HQXACMode
{
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HQX_AC_Q0
= 0,
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HQX_AC_Q8
,
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HQX_AC_Q16
,
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HQX_AC_Q32
,
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HQX_AC_Q64
,
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HQX_AC_Q128
,
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NUM_HQX_AC
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};
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typedef
struct
HQXLUT
{
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int16_t
lev
;
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uint8_t
run
;
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int8_t
bits
;
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}
HQXLUT
;
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typedef
struct
HQXAC
{
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int
lut_bits
,
extra_bits
;
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const
HQXLUT
*
lut
;
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}
HQXAC
;
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struct
HQXContext
;
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typedef
int (*
mb_decode_func
)(
struct
HQXContext
*ctx,
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int
slice_no,
int
x,
int
y
);
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typedef
struct
HQXSlice
{
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GetBitContext
gb
;
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DECLARE_ALIGNED
(16, int16_t,
block
)[16][64];
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}
HQXSlice
;
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typedef
struct
HQXContext
{
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HQXDSPContext
hqxdsp
;
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HQXSlice
slice
[16];
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AVFrame
*
pic
;
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mb_decode_func
decode_func
;
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int
format
,
dcb
,
width
,
height
;
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int
interlaced
;
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uint8_t
*
src
;
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unsigned
int
data_size
;
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uint32_t
slice_off
[17];
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VLC
cbp_vlc
;
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VLC
dc_vlc
[3];
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}
HQXContext
;
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#define HQX_DC_VLC_BITS 9
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extern
const
HQXAC
ff_hqx_ac
[
NUM_HQX_AC
];
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int
ff_hqx_init_vlcs
(
HQXContext
*ctx);
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#endif
/* AVCODEC_HQX_H */
HQXAC
Definition:
hqx.h:47
HQXContext::dcb
int dcb
Definition:
hqx.h:69
HQXContext::slice
HQXSlice slice[16]
Definition:
hqx.h:64
HQXContext::height
int height
Definition:
hqx.h:69
AVFrame
This structure describes decoded (raw) audio or video data.
Definition:
frame.h:171
HQXContext::interlaced
int interlaced
Definition:
hqx.h:70
mem.h
memory handling functions
mb_decode_func
int(* mb_decode_func)(struct HQXContext *ctx, int slice_no, int x, int y)
Definition:
hqx.h:54
HQXSlice::gb
GetBitContext gb
Definition:
hqx.h:58
HQX_AC_Q32
Definition:
hqx.h:35
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Definition:
mem.h:53
HQXContext::decode_func
mb_decode_func decode_func
Definition:
hqx.h:67
ff_hqx_init_vlcs
int ff_hqx_init_vlcs(HQXContext *ctx)
Definition:
hqxvlc.c:2151
HQX_AC_Q16
Definition:
hqx.h:34
ff_hqx_ac
const HQXAC ff_hqx_ac[NUM_HQX_AC]
Definition:
hqxvlc.c:2132
HQXContext::src
uint8_t * src
Definition:
hqx.h:72
uint8_t
uint8_t
Definition:
audio_convert.c:194
HQXLUT::run
uint8_t run
Definition:
hqx.h:43
get_bits.h
bitstream reader API header.
HQXAC::lut
const HQXLUT * lut
Definition:
hqx.h:49
HQXContext::dc_vlc
VLC dc_vlc[3]
Definition:
hqx.h:77
HQXAC::lut_bits
int lut_bits
Definition:
hqx.h:48
HQXContext
Definition:
hqx.h:62
VLC
Definition:
get_bits.h:63
frame.h
reference-counted frame API
HQXSlice
Definition:
hqx.h:57
HQX_AC_Q64
Definition:
hqx.h:36
HQXDSPContext
Definition:
hqxdsp.h:32
y
float y
Definition:
avf_showspectrum.c:96
HQXAC::extra_bits
int extra_bits
Definition:
hqx.h:48
hqxdsp.h
HQX DSP routines.
HQXACMode
HQXACMode
Definition:
hqx.h:31
HQXContext::width
int width
Definition:
hqx.h:69
HQX_AC_Q0
Definition:
hqx.h:32
HQXLUT::bits
int8_t bits
Definition:
hqx.h:44
HQXSlice::block
int16_t block[16][64]
Definition:
hqx.h:59
HQXLUT
Definition:
hqx.h:41
HQXContext::slice_off
uint32_t slice_off[17]
Definition:
hqx.h:74
HQXLUT::lev
int16_t lev
Definition:
hqx.h:42
GetBitContext
Definition:
get_bits.h:54
HQXContext::data_size
unsigned int data_size
Definition:
hqx.h:73
HQXContext::pic
AVFrame * pic
Definition:
hqx.h:66
HQXContext::format
int format
Definition:
hqx.h:69
NUM_HQX_AC
Definition:
hqx.h:38
HQXContext::cbp_vlc
VLC cbp_vlc
Definition:
hqx.h:76
HQX_AC_Q8
Definition:
hqx.h:33
HQX_AC_Q128
Definition:
hqx.h:37
HQXContext::hqxdsp
HQXDSPContext hqxdsp
Definition:
hqx.h:63
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