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libavcodec
fmtconvert.h
Go to the documentation of this file.
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/*
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* Format Conversion Utils
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* Copyright (c) 2000, 2001 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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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_FMTCONVERT_H
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#define AVCODEC_FMTCONVERT_H
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#include "
avcodec.h
"
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typedef
struct
FmtConvertContext
{
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/**
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* Convert an array of int32_t to float and multiply by a float value.
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* @param dst destination array of float.
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* constraints: 16-byte aligned
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* @param src source array of int32_t.
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* constraints: 16-byte aligned
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* @param len number of elements to convert.
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* constraints: multiple of 8
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*/
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void
(*
int32_to_float_fmul_scalar
)(
float
*dst,
const
int32_t
*
src
,
float
mul,
int
len
);
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/**
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* Convert an array of float to an array of int16_t.
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*
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* Convert floats from in the range [-32768.0,32767.0] to ints
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* without rescaling
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*
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* @param dst destination array of int16_t.
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* constraints: 16-byte aligned
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* @param src source array of float.
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* constraints: 16-byte aligned
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* @param len number of elements to convert.
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* constraints: multiple of 8
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*/
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void
(*
float_to_int16
)(int16_t *dst,
const
float
*
src
,
long
len
);
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/**
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* Convert multiple arrays of float to an interleaved array of int16_t.
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*
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* Convert floats from in the range [-32768.0,32767.0] to ints
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* without rescaling
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*
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* @param dst destination array of interleaved int16_t.
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* constraints: 16-byte aligned
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* @param src source array of float arrays, one for each channel.
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* constraints: 16-byte aligned
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* @param len number of elements to convert.
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* constraints: multiple of 8
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* @param channels number of channels
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*/
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void
(*
float_to_int16_interleave
)(int16_t *dst,
const
float
**
src
,
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long
len
,
int
channels);
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/**
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* Convert multiple arrays of float to an array of interleaved float.
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*
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* @param dst destination array of interleaved float.
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* constraints: 16-byte aligned
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* @param src source array of float arrays, one for each channel.
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* constraints: 16-byte aligned
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* @param len number of elements to convert.
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* constraints: multiple of 8
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* @param channels number of channels
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*/
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void
(*
float_interleave
)(
float
*dst,
const
float
**
src
,
unsigned
int
len
,
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int
channels);
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}
FmtConvertContext
;
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void
ff_float_interleave_c
(
float
*dst,
const
float
**
src
,
unsigned
int
len
,
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int
channels);
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void
ff_fmt_convert_init
(
FmtConvertContext
*
c
,
AVCodecContext
*avctx);
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void
ff_fmt_convert_init_arm
(
FmtConvertContext
*
c
,
AVCodecContext
*avctx);
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void
ff_fmt_convert_init_ppc
(
FmtConvertContext
*
c
,
AVCodecContext
*avctx);
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void
ff_fmt_convert_init_x86
(
FmtConvertContext
*
c
,
AVCodecContext
*avctx);
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void
ff_fmt_convert_init_mips
(
FmtConvertContext
*
c
);
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/* ffdshow custom code */
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void
float_interleave
(
float
*dst,
const
float
**
src
,
long
len
,
int
channels);
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void
float_interleave_noscale
(
float
*dst,
const
float
**
src
,
long
len
,
int
channels);
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#endif
/* AVCODEC_FMTCONVERT_H */
Generated on Wed Jul 10 2013 23:47:58 for FFmpeg by
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