63 lines
2.5 KiB
C
63 lines
2.5 KiB
C
/* Copyright (C) 2010-2021 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (s16_to_float.h).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __LIBRETRO_SDK_CONVERSION_S16_TO_FLOAT_H__
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#define __LIBRETRO_SDK_CONVERSION_S16_TO_FLOAT_H__
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#include <stdint.h>
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#include <stddef.h>
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#include <retro_common_api.h>
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RETRO_BEGIN_DECLS
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/**
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* Converts an array of signed integer 16-bit audio samples
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* to floating-point format,
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* possibly using SIMD intrinsics.
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*
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* @param out The buffer that will be used to store the converted samples.
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* @param in The buffer containing the samples to convert.
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* Any number of channels is supported.
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* @param samples The length of \c in in samples, \em not bytes or frames.
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* \c out must be as large as <tt>sizeof(float) * samples</tt>.
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* @param gain The gain (audio volume) to apply to the samples.
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* Pass a value of 1.0 to not apply any gain.
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* @see convert_float_to_s16
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**/
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void convert_s16_to_float(float *out,
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const int16_t *in, size_t samples, float gain);
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/**
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* Initializes any prerequisites for
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* using SIMD implementations of \c convert_s16_to_float.
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*
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* If SIMD intrinsics are not available or no initialization is required,
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* this function does nothing.
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*
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* @see convert_s16_to_float
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**/
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void convert_s16_to_float_init_simd(void);
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RETRO_END_DECLS
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#endif
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