FFmpeg
libavcodec
dsd.h
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/*
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* Direct Stream Digital (DSD) decoder
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* based on BSD licensed dsd2pcm by Sebastian Gesemann
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* Copyright (c) 2009, 2011 Sebastian Gesemann. All rights reserved.
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* Copyright (c) 2014 Peter Ross
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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_DSD_H
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#define AVCODEC_DSD_H
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#include <stddef.h>
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#include <stdint.h>
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#define HTAPS 48
/** number of FIR constants */
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#define FIFOSIZE 16
/** must be a power of two */
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#define FIFOMASK (FIFOSIZE - 1)
/** bit mask for FIFO offsets */
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#if FIFOSIZE * 8 < HTAPS * 2
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#error "FIFOSIZE too small"
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#endif
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/**
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* Per-channel buffer
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*/
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typedef
struct
DSDContext
{
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uint8_t
buf
[
FIFOSIZE
];
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unsigned
pos
;
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}
DSDContext
;
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void
ff_init_dsd_data
(
void
);
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void
ff_dsd2pcm_translate
(
DSDContext
*
s
,
size_t
samples
,
int
lsbf,
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const
uint8_t *
src
, ptrdiff_t src_stride,
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float
*
dst
, ptrdiff_t dst_stride);
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#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
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