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/*
* Copyright (C) 2003-2013 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 <glib.h>
#include <algorithm>
#include <string.h>
PcmDsd::PcmDsd()
{
pcm_buffer_init(&buffer);
std::fill_n(dsd2pcm, G_N_ELEMENTS(dsd2pcm), nullptr);
}
PcmDsd::~PcmDsd()
{
pcm_buffer_deinit(&buffer);
for (unsigned i = 0; i < G_N_ELEMENTS(dsd2pcm); ++i)
if (dsd2pcm[i] != nullptr)
dsd2pcm_destroy(dsd2pcm[i]);
}
void
PcmDsd::Reset()
{
for (unsigned i = 0; i < G_N_ELEMENTS(dsd2pcm); ++i)
if (dsd2pcm[i] != nullptr)
dsd2pcm_reset(dsd2pcm[i]);
}
const float *
PcmDsd::ToFloat(unsigned channels, bool lsbfirst,
const uint8_t *src, size_t src_size,
size_t *dest_size_r)
{
assert(src != nullptr);
assert(src_size > 0);
assert(src_size % channels == 0);
assert(channels <= G_N_ELEMENTS(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_size_r = dest_size;
dest = (float *)pcm_buffer_get(&buffer, 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 + c, channels,
lsbfirst, dest + c, channels);
}
return dest;
}
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