FFmpeg
libavcodec
dsd.h
Go to the documentation of this file.
1
/*
2
* Direct Stream Digital (DSD) decoder
3
* based on BSD licensed dsd2pcm by Sebastian Gesemann
4
* Copyright (c) 2009, 2011 Sebastian Gesemann. All rights reserved.
5
* Copyright (c) 2014 Peter Ross
6
*
7
* This file is part of FFmpeg.
8
*
9
* FFmpeg is free software; you can redistribute it and/or
10
* modify it under the terms of the GNU Lesser General Public
11
* License as published by the Free Software Foundation; either
12
* version 2.1 of the License, or (at your option) any later version.
13
*
14
* FFmpeg is distributed in the hope that it will be useful,
15
* but WITHOUT ANY WARRANTY; without even the implied warranty of
16
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17
* Lesser General Public License for more details.
18
*
19
* You should have received a copy of the GNU Lesser General Public
20
* License along with FFmpeg; if not, write to the Free Software
21
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22
*/
23
24
#ifndef AVCODEC_DSD_H
25
#define AVCODEC_DSD_H
26
27
#include <stddef.h>
28
#include <stdint.h>
29
30
#define HTAPS 48
/** number of FIR constants */
31
#define FIFOSIZE 16
/** must be a power of two */
32
#define FIFOMASK (FIFOSIZE - 1)
/** bit mask for FIFO offsets */
33
34
#if FIFOSIZE * 8 < HTAPS * 2
35
#error "FIFOSIZE too small"
36
#endif
37
38
/**
39
* Per-channel buffer
40
*/
41
typedef
struct
DSDContext
{
42
uint8_t
buf
[
FIFOSIZE
];
43
unsigned
pos
;
44
}
DSDContext
;
45
46
void
ff_init_dsd_data
(
void
);
47
48
void
ff_dsd2pcm_translate
(
DSDContext
*
s
,
size_t
samples
,
int
lsbf,
49
const
uint8_t *
src
, ptrdiff_t src_stride,
50
float
*
dst
, ptrdiff_t dst_stride);
51
#endif
/* AVCODEC_DSD_H */
ff_init_dsd_data
void ff_init_dsd_data(void)
Definition:
dsd.c:92
s
#define s(width, name)
Definition:
cbs_vp9.c:198
DSDContext::pos
unsigned pos
Definition:
dsd.h:43
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition:
dsp.h:83
ff_dsd2pcm_translate
void ff_dsd2pcm_translate(DSDContext *s, size_t samples, int lsbf, const uint8_t *src, ptrdiff_t src_stride, float *dst, ptrdiff_t dst_stride)
Definition:
dsd.c:98
DSDContext
Per-channel buffer.
Definition:
dsd.h:41
DSDContext::buf
uint8_t buf[FIFOSIZE]
Definition:
dsd.h:42
samples
Filter the word “frame” indicates either a video frame or a group of audio samples
Definition:
filter_design.txt:8
FIFOSIZE
#define FIFOSIZE
Definition:
dsd.h:31
src
#define src
Definition:
vp8dsp.c:248
Generated on Thu Dec 12 2024 19:21:30 for FFmpeg by
1.8.17