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/*
* Copyright (C) 2003-2015 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "PcmDsd.hxx"
#include "dsd2pcm/dsd2pcm.h"
#include "util/Macros.hxx"
#include "util/ConstBuffer.hxx"
#include <algorithm>
#include <assert.h>
PcmDsd::PcmDsd()
{
std::fill_n(dsd2pcm, ARRAY_SIZE(dsd2pcm), nullptr);
}
PcmDsd::~PcmDsd()
{
for (unsigned i = 0; i < ARRAY_SIZE(dsd2pcm); ++i)
if (dsd2pcm[i] != nullptr)
dsd2pcm_destroy(dsd2pcm[i]);
}
void
PcmDsd::Reset()
{
for (unsigned i = 0; i < ARRAY_SIZE(dsd2pcm); ++i)
if (dsd2pcm[i] != nullptr)
dsd2pcm_reset(dsd2pcm[i]);
}
ConstBuffer<float>
PcmDsd::ToFloat(unsigned channels, ConstBuffer<uint8_t> src)
{
assert(!src.IsNull());
assert(!src.IsEmpty());
assert(src.size % channels == 0);
assert(channels <= ARRAY_SIZE(dsd2pcm));
const unsigned num_samples = src.size;
const unsigned num_frames = src.size / channels;
float *dest;
const size_t dest_size = num_samples * sizeof(*dest);
dest = (float *)buffer.Get(dest_size);
for (unsigned c = 0; c < channels; ++c) {
if (dsd2pcm[c] == nullptr) {
dsd2pcm[c] = dsd2pcm_init();
if (dsd2pcm[c] == nullptr)
return nullptr;
}
dsd2pcm_translate(dsd2pcm[c], num_frames,
src.data + c, channels,
false, dest + c, channels);
}
return { dest, num_samples };
}
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