74 lines
1.8 KiB
C++
74 lines
1.8 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 "PcmDsd.hxx"
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#include "dsd2pcm/dsd2pcm.h"
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#include "util/ConstBuffer.hxx"
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#include <assert.h>
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PcmDsd::PcmDsd()
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{
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dsd2pcm.fill(nullptr);
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}
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PcmDsd::~PcmDsd()
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{
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for (auto i : dsd2pcm)
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if (i != nullptr)
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dsd2pcm_destroy(i);
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}
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void
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PcmDsd::Reset()
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{
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for (auto i : dsd2pcm)
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if (i != nullptr)
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dsd2pcm_reset(i);
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}
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ConstBuffer<float>
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PcmDsd::ToFloat(unsigned channels, ConstBuffer<uint8_t> src)
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{
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assert(!src.IsNull());
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assert(!src.IsEmpty());
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assert(src.size % channels == 0);
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assert(channels <= dsd2pcm.max_size());
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const unsigned num_samples = src.size;
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const unsigned num_frames = src.size / channels;
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float *dest = buffer.GetT<float>(num_samples);
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for (unsigned c = 0; c < channels; ++c) {
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if (dsd2pcm[c] == nullptr) {
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dsd2pcm[c] = dsd2pcm_init();
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if (dsd2pcm[c] == nullptr)
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return nullptr;
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}
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dsd2pcm_translate(dsd2pcm[c], num_frames,
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src.data + c, channels,
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false, dest + c, channels);
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}
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return { dest, num_samples };
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}
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