71f0ed8b74
This eliminates some overhead, because the compiler doesn't need to consider these functions throwing.
397 lines
11 KiB
C++
397 lines
11 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "PcmFormat.hxx"
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#include "PcmBuffer.hxx"
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#include "PcmUtils.hxx"
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#include "Traits.hxx"
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#include "FloatConvert.hxx"
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#include "ShiftConvert.hxx"
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#include "util/ConstBuffer.hxx"
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#include "PcmDither.cxx" // including the .cxx file to get inlined templates
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/**
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* Wrapper for a class that converts one sample at a time into one
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* that converts a buffer at a time.
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*/
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template<typename C>
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struct PerSampleConvert : C {
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typedef typename C::SrcTraits SrcTraits;
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typedef typename C::DstTraits DstTraits;
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void Convert(typename DstTraits::pointer_type gcc_restrict out,
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typename SrcTraits::const_pointer_type gcc_restrict in,
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size_t n) const {
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for (size_t i = 0; i != n; ++i)
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out[i] = C::Convert(in[i]);
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}
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};
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struct Convert8To16
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: PerSampleConvert<LeftShiftSampleConvert<SampleFormat::S8,
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SampleFormat::S16>> {};
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struct Convert24To16 {
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typedef SampleTraits<SampleFormat::S24_P32> SrcTraits;
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typedef SampleTraits<SampleFormat::S16> DstTraits;
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PcmDither &dither;
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Convert24To16(PcmDither &_dither):dither(_dither) {}
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void Convert(int16_t *out, const int32_t *in, size_t n) {
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dither.Dither24To16(out, in, in + n);
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}
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};
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struct Convert32To16 {
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typedef SampleTraits<SampleFormat::S32> SrcTraits;
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typedef SampleTraits<SampleFormat::S16> DstTraits;
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PcmDither &dither;
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Convert32To16(PcmDither &_dither):dither(_dither) {}
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void Convert(int16_t *out, const int32_t *in, size_t n) {
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dither.Dither32To16(out, in, in + n);
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}
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};
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template<SampleFormat F, class Traits=SampleTraits<F>>
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struct PortableFloatToInteger
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: PerSampleConvert<FloatToIntegerSampleConvert<F, Traits>> {};
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template<SampleFormat F, class Traits=SampleTraits<F>>
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struct FloatToInteger : PortableFloatToInteger<F, Traits> {};
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/**
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* A template class that attempts to use the "optimized" algorithm for
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* large portions of the buffer, and calls the "portable" algorithm"
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* for the rest when the last block is not full.
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*/
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template<typename Optimized, typename Portable>
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class GlueOptimizedConvert : Optimized, Portable {
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public:
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typedef typename Portable::SrcTraits SrcTraits;
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typedef typename Portable::DstTraits DstTraits;
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void Convert(typename DstTraits::pointer_type out,
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typename SrcTraits::const_pointer_type in,
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size_t n) const {
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Optimized::Convert(out, in, n);
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/* use the "portable" algorithm for the trailing
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samples */
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size_t remaining = n % Optimized::BLOCK_SIZE;
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size_t done = n - remaining;
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Portable::Convert(out + done, in + done, remaining);
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}
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};
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#ifdef __ARM_NEON__
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#include "Neon.hxx"
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template<>
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struct FloatToInteger<SampleFormat::S16, SampleTraits<SampleFormat::S16>>
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: GlueOptimizedConvert<NeonFloatTo16,
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PortableFloatToInteger<SampleFormat::S16>> {};
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#endif
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template<class C>
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static ConstBuffer<typename C::DstTraits::value_type>
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AllocateConvert(PcmBuffer &buffer, C convert,
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ConstBuffer<typename C::SrcTraits::value_type> src)
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{
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auto dest = buffer.GetT<typename C::DstTraits::value_type>(src.size);
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convert.Convert(dest, src.data, src.size);
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return { dest, src.size };
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}
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template<SampleFormat F, class Traits=SampleTraits<F>>
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static ConstBuffer<typename Traits::value_type>
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AllocateFromFloat(PcmBuffer &buffer, ConstBuffer<float> src)
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{
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return AllocateConvert(buffer, FloatToInteger<F, Traits>(), src);
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}
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static ConstBuffer<int16_t>
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pcm_allocate_8_to_16(PcmBuffer &buffer, ConstBuffer<int8_t> src)
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{
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return AllocateConvert(buffer, Convert8To16(), src);
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}
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static ConstBuffer<int16_t>
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pcm_allocate_24p32_to_16(PcmBuffer &buffer, PcmDither &dither,
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ConstBuffer<int32_t> src)
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{
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return AllocateConvert(buffer, Convert24To16(dither), src);
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}
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static ConstBuffer<int16_t>
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pcm_allocate_32_to_16(PcmBuffer &buffer, PcmDither &dither,
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ConstBuffer<int32_t> src)
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{
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return AllocateConvert(buffer, Convert32To16(dither), src);
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}
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static ConstBuffer<int16_t>
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pcm_allocate_float_to_16(PcmBuffer &buffer, ConstBuffer<float> src)
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{
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return AllocateFromFloat<SampleFormat::S16>(buffer, src);
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}
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ConstBuffer<int16_t>
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pcm_convert_to_16(PcmBuffer &buffer, PcmDither &dither,
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SampleFormat src_format, ConstBuffer<void> src) noexcept
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{
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switch (src_format) {
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case SampleFormat::UNDEFINED:
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case SampleFormat::DSD:
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break;
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case SampleFormat::S8:
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return pcm_allocate_8_to_16(buffer,
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ConstBuffer<int8_t>::FromVoid(src));
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case SampleFormat::S16:
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return ConstBuffer<int16_t>::FromVoid(src);
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case SampleFormat::S24_P32:
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return pcm_allocate_24p32_to_16(buffer, dither,
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ConstBuffer<int32_t>::FromVoid(src));
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case SampleFormat::S32:
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return pcm_allocate_32_to_16(buffer, dither,
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ConstBuffer<int32_t>::FromVoid(src));
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case SampleFormat::FLOAT:
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return pcm_allocate_float_to_16(buffer,
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ConstBuffer<float>::FromVoid(src));
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}
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return nullptr;
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}
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struct Convert8To24
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: PerSampleConvert<LeftShiftSampleConvert<SampleFormat::S8,
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SampleFormat::S24_P32>> {};
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struct Convert16To24
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: PerSampleConvert<LeftShiftSampleConvert<SampleFormat::S16,
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SampleFormat::S24_P32>> {};
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static ConstBuffer<int32_t>
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pcm_allocate_8_to_24(PcmBuffer &buffer, ConstBuffer<int8_t> src)
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{
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return AllocateConvert(buffer, Convert8To24(), src);
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}
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static ConstBuffer<int32_t>
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pcm_allocate_16_to_24(PcmBuffer &buffer, ConstBuffer<int16_t> src)
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{
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return AllocateConvert(buffer, Convert16To24(), src);
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}
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struct Convert32To24
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: PerSampleConvert<RightShiftSampleConvert<SampleFormat::S32,
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SampleFormat::S24_P32>> {};
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static ConstBuffer<int32_t>
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pcm_allocate_32_to_24(PcmBuffer &buffer, ConstBuffer<int32_t> src)
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{
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return AllocateConvert(buffer, Convert32To24(), src);
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}
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static ConstBuffer<int32_t>
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pcm_allocate_float_to_24(PcmBuffer &buffer, ConstBuffer<float> src)
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{
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return AllocateFromFloat<SampleFormat::S24_P32>(buffer, src);
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}
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ConstBuffer<int32_t>
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pcm_convert_to_24(PcmBuffer &buffer,
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SampleFormat src_format, ConstBuffer<void> src) noexcept
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{
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switch (src_format) {
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case SampleFormat::UNDEFINED:
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case SampleFormat::DSD:
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break;
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case SampleFormat::S8:
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return pcm_allocate_8_to_24(buffer,
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ConstBuffer<int8_t>::FromVoid(src));
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case SampleFormat::S16:
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return pcm_allocate_16_to_24(buffer,
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ConstBuffer<int16_t>::FromVoid(src));
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case SampleFormat::S24_P32:
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return ConstBuffer<int32_t>::FromVoid(src);
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case SampleFormat::S32:
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return pcm_allocate_32_to_24(buffer,
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ConstBuffer<int32_t>::FromVoid(src));
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case SampleFormat::FLOAT:
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return pcm_allocate_float_to_24(buffer,
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ConstBuffer<float>::FromVoid(src));
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}
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return nullptr;
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}
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struct Convert8To32
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: PerSampleConvert<LeftShiftSampleConvert<SampleFormat::S8,
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SampleFormat::S32>> {};
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struct Convert16To32
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: PerSampleConvert<LeftShiftSampleConvert<SampleFormat::S16,
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SampleFormat::S32>> {};
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struct Convert24To32
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: PerSampleConvert<LeftShiftSampleConvert<SampleFormat::S24_P32,
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SampleFormat::S32>> {};
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static ConstBuffer<int32_t>
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pcm_allocate_8_to_32(PcmBuffer &buffer, ConstBuffer<int8_t> src)
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{
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return AllocateConvert(buffer, Convert8To32(), src);
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}
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static ConstBuffer<int32_t>
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pcm_allocate_16_to_32(PcmBuffer &buffer, ConstBuffer<int16_t> src)
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{
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return AllocateConvert(buffer, Convert16To32(), src);
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}
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static ConstBuffer<int32_t>
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pcm_allocate_24p32_to_32(PcmBuffer &buffer, ConstBuffer<int32_t> src)
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{
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return AllocateConvert(buffer, Convert24To32(), src);
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}
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static ConstBuffer<int32_t>
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pcm_allocate_float_to_32(PcmBuffer &buffer, ConstBuffer<float> src)
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{
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return AllocateFromFloat<SampleFormat::S32>(buffer, src);
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}
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ConstBuffer<int32_t>
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pcm_convert_to_32(PcmBuffer &buffer,
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SampleFormat src_format, ConstBuffer<void> src) noexcept
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{
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switch (src_format) {
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case SampleFormat::UNDEFINED:
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case SampleFormat::DSD:
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break;
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case SampleFormat::S8:
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return pcm_allocate_8_to_32(buffer,
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ConstBuffer<int8_t>::FromVoid(src));
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case SampleFormat::S16:
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return pcm_allocate_16_to_32(buffer,
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ConstBuffer<int16_t>::FromVoid(src));
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case SampleFormat::S24_P32:
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return pcm_allocate_24p32_to_32(buffer,
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ConstBuffer<int32_t>::FromVoid(src));
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case SampleFormat::S32:
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return ConstBuffer<int32_t>::FromVoid(src);
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case SampleFormat::FLOAT:
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return pcm_allocate_float_to_32(buffer,
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ConstBuffer<float>::FromVoid(src));
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}
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return nullptr;
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}
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struct Convert8ToFloat
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: PerSampleConvert<IntegerToFloatSampleConvert<SampleFormat::S8>> {};
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struct Convert16ToFloat
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: PerSampleConvert<IntegerToFloatSampleConvert<SampleFormat::S16>> {};
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struct Convert24ToFloat
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: PerSampleConvert<IntegerToFloatSampleConvert<SampleFormat::S24_P32>> {};
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struct Convert32ToFloat
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: PerSampleConvert<IntegerToFloatSampleConvert<SampleFormat::S32>> {};
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static ConstBuffer<float>
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pcm_allocate_8_to_float(PcmBuffer &buffer, ConstBuffer<int8_t> src)
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{
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return AllocateConvert(buffer, Convert8ToFloat(), src);
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}
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static ConstBuffer<float>
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pcm_allocate_16_to_float(PcmBuffer &buffer, ConstBuffer<int16_t> src)
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{
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return AllocateConvert(buffer, Convert16ToFloat(), src);
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}
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static ConstBuffer<float>
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pcm_allocate_24p32_to_float(PcmBuffer &buffer, ConstBuffer<int32_t> src)
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{
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return AllocateConvert(buffer, Convert24ToFloat(), src);
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}
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static ConstBuffer<float>
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pcm_allocate_32_to_float(PcmBuffer &buffer, ConstBuffer<int32_t> src)
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{
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return AllocateConvert(buffer, Convert32ToFloat(), src);
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}
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ConstBuffer<float>
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pcm_convert_to_float(PcmBuffer &buffer,
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SampleFormat src_format, ConstBuffer<void> src) noexcept
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{
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switch (src_format) {
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case SampleFormat::UNDEFINED:
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case SampleFormat::DSD:
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break;
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case SampleFormat::S8:
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return pcm_allocate_8_to_float(buffer,
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ConstBuffer<int8_t>::FromVoid(src));
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case SampleFormat::S16:
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return pcm_allocate_16_to_float(buffer,
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ConstBuffer<int16_t>::FromVoid(src));
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case SampleFormat::S32:
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return pcm_allocate_32_to_float(buffer,
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ConstBuffer<int32_t>::FromVoid(src));
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case SampleFormat::S24_P32:
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return pcm_allocate_24p32_to_float(buffer,
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ConstBuffer<int32_t>::FromVoid(src));
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case SampleFormat::FLOAT:
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return ConstBuffer<float>::FromVoid(src);
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}
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return nullptr;
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}
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