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/*
* Copyright 2003-2020 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 "DecoderClient.hxx"
#include "pcm/Convert.hxx"
#include "input/InputStream.hxx"
#include "util/ConstBuffer.hxx"
ChromaprintDecoderClient::ChromaprintDecoderClient() = default;
ChromaprintDecoderClient::~ChromaprintDecoderClient() noexcept = default;
void
ChromaprintDecoderClient::Finish()
{
if (error)
std::rethrow_exception(error);
if (!ready)
throw std::runtime_error("Decoding failed");
if (convert) {
auto flushed = convert->Flush();
auto data = ConstBuffer<int16_t>::FromVoid(flushed);
chromaprint.Feed(data.data, data.size);
}
chromaprint.Finish();
}
void
ChromaprintDecoderClient::Ready(AudioFormat audio_format, bool,
SignedSongTime) noexcept
{
/* feed the first two minutes into libchromaprint */
remaining_bytes = audio_format.TimeToSize(std::chrono::minutes(2));
if (audio_format.format != SampleFormat::S16) {
const AudioFormat src_audio_format = audio_format;
audio_format.format = SampleFormat::S16;
convert = std::make_unique<PcmConvert>(src_audio_format,
audio_format);
}
chromaprint.Start(audio_format.sample_rate, audio_format.channels);
ready = true;
}
DecoderCommand
ChromaprintDecoderClient::SubmitData(InputStream *,
const void *_data, size_t length,
uint16_t) noexcept
{
assert(ready);
if (length > remaining_bytes)
remaining_bytes = 0;
else
remaining_bytes -= length;
ConstBuffer<void> src{_data, length};
ConstBuffer<int16_t> data;
if (convert) {
auto result = convert->Convert(src);
data = ConstBuffer<int16_t>::FromVoid(result);
} else
data = ConstBuffer<int16_t>::FromVoid(src);
chromaprint.Feed(data.data, data.size);
return GetCommand();
}
size_t
ChromaprintDecoderClient::Read(InputStream &is,
void *buffer, size_t length) noexcept
{
try {
return is.LockRead(buffer, length);
} catch (...) {
error = std::current_exception();
return 0;
}
}
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