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/*
* Copyright 2003-2021 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 "GlueResampler.hxx"
#include "ConfiguredResampler.hxx"
#include "Resampler.hxx"
#include "AudioFormat.hxx"
#include <cassert>
GluePcmResampler::GluePcmResampler()
:resampler(pcm_resampler_create()) {}
GluePcmResampler::~GluePcmResampler() noexcept
{
delete resampler;
}
void
GluePcmResampler::Open(AudioFormat src_format, unsigned new_sample_rate)
{
assert(src_format.IsValid());
assert(audio_valid_sample_rate(new_sample_rate));
AudioFormat requested_format = src_format;
AudioFormat dest_format = resampler->Open(requested_format,
new_sample_rate);
assert(dest_format.IsValid());
assert(requested_format.channels == src_format.channels);
assert(dest_format.channels == src_format.channels);
assert(dest_format.sample_rate == new_sample_rate);
if (requested_format.format != src_format.format)
format_converter.Open(src_format.format,
requested_format.format);
src_sample_format = src_format.format;
requested_sample_format = requested_format.format;
output_sample_format = dest_format.format;
}
void
GluePcmResampler::Close() noexcept
{
if (requested_sample_format != src_sample_format)
format_converter.Close();
resampler->Close();
}
void
GluePcmResampler::Reset() noexcept
{
resampler->Reset();
}
ConstBuffer<void>
GluePcmResampler::Resample(ConstBuffer<void> src)
{
assert(!src.IsNull());
if (requested_sample_format != src_sample_format)
src = format_converter.Convert(src);
return resampler->Resample(src);
}
ConstBuffer<void>
GluePcmResampler::Flush()
{
return resampler->Flush();
}
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