mirror of
https://github.com/badaix/snapcast.git
synced 2025-04-29 02:07:55 +02:00
110 lines
2.8 KiB
C++
110 lines
2.8 KiB
C++
/***
|
|
This file is part of snapcast
|
|
Copyright (C) 2014-2020 Johannes Pohl
|
|
|
|
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 3 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, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
#include <cmath>
|
|
#include <iostream>
|
|
|
|
#include "common/aixlog.hpp"
|
|
#include "player.hpp"
|
|
|
|
|
|
using namespace std;
|
|
|
|
|
|
Player::Player(const PcmDevice& pcmDevice, std::shared_ptr<Stream> stream)
|
|
: active_(false), stream_(stream), pcmDevice_(pcmDevice), volume_(1.0), muted_(false), volCorrection_(1.0)
|
|
{
|
|
}
|
|
|
|
|
|
|
|
void Player::start()
|
|
{
|
|
active_ = true;
|
|
playerThread_ = thread(&Player::worker, this);
|
|
}
|
|
|
|
|
|
Player::~Player()
|
|
{
|
|
stop();
|
|
}
|
|
|
|
|
|
|
|
void Player::stop()
|
|
{
|
|
if (active_)
|
|
{
|
|
active_ = false;
|
|
playerThread_.join();
|
|
}
|
|
}
|
|
|
|
|
|
void Player::adjustVolume(char* buffer, size_t frames)
|
|
{
|
|
double volume = volume_;
|
|
if (muted_)
|
|
volume = 0.;
|
|
|
|
const SampleFormat& sampleFormat = stream_->getFormat();
|
|
|
|
if ((volume < 1.0) || (volCorrection_ != 1.))
|
|
{
|
|
volume *= volCorrection_;
|
|
if (sampleFormat.sampleSize == 1)
|
|
adjustVolume<int8_t>(buffer, frames * sampleFormat.channels, volume);
|
|
else if (sampleFormat.sampleSize == 2)
|
|
adjustVolume<int16_t>(buffer, frames * sampleFormat.channels, volume);
|
|
else if (sampleFormat.sampleSize == 4)
|
|
adjustVolume<int32_t>(buffer, frames * sampleFormat.channels, volume);
|
|
}
|
|
}
|
|
|
|
|
|
// https://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/pulse/volume.c#n260
|
|
// http://www.robotplanet.dk/audio/audio_gui_design/
|
|
// https://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-May/thread.html#22198
|
|
void Player::setVolume_poly(double volume, double exp)
|
|
{
|
|
volume_ = std::pow(volume, exp);
|
|
LOG(DEBUG) << "setVolume poly: " << volume << " => " << volume_ << "\n";
|
|
}
|
|
|
|
|
|
// http://stackoverflow.com/questions/1165026/what-algorithms-could-i-use-for-audio-volume-level
|
|
void Player::setVolume_exp(double volume, double base)
|
|
{
|
|
// double base = M_E;
|
|
// double base = 10.;
|
|
volume_ = (pow(base, volume) - 1) / (base - 1);
|
|
LOG(DEBUG) << "setVolume exp: " << volume << " => " << volume_ << "\n";
|
|
}
|
|
|
|
|
|
void Player::setVolume(double volume)
|
|
{
|
|
setVolume_exp(volume, 10.);
|
|
}
|
|
|
|
|
|
void Player::setMute(bool mute)
|
|
{
|
|
muted_ = mute;
|
|
}
|