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/***
This file is part of snapcast
Copyright (C) 2014-2025 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/>.
***/
// prototype/interface header file
#include "file_player.hpp"
// local headers
#include "common/aixlog.hpp"
#include "common/snap_exception.hpp"
#include "common/str_compat.hpp"
#include "common/utils/string_utils.hpp"
// 3rd party headers
// standard headers
using namespace std;
namespace player
{
static constexpr auto LOG_TAG = "FilePlayer";
static constexpr auto kDefaultBuffer = 50ms;
static constexpr auto kDescription = "Raw PCM file output";
std::vector<PcmDevice> FilePlayer::pcm_list(const std::string& parameter)
{
auto params = utils::string::split_pairs(parameter, ',', '=');
string filename;
if (params.find("filename") != params.end())
filename = params["filename"];
if (filename.empty())
filename = "stdout";
return {PcmDevice{0, filename, kDescription}};
}
FilePlayer::FilePlayer(boost::asio::io_context& io_context, const ClientSettings::Player& settings, std::shared_ptr<Stream> stream)
: Player(io_context, settings, std::move(stream)), timer_(io_context), file_(nullptr)
{
auto params = utils::string::split_pairs(settings.parameter, ',', '=');
string filename;
if (params.find("filename") != params.end())
filename = params["filename"];
if (filename.empty() || (filename == "stdout"))
{
file_.reset(stdout, [](auto p) { std::ignore = p; });
}
else if (filename == "stderr")
{
file_.reset(stderr, [](auto p) { std::ignore = p; });
}
else if (filename != "null")
{
std::string mode = "w";
if (params.find("mode") != params.end())
mode = params["mode"];
if ((mode != "w") && (mode != "a"))
throw SnapException("Mode must be w (write) or a (append)");
mode += "b";
file_.reset(fopen(filename.c_str(), mode.c_str()), [](auto p) { fclose(p); });
if (!file_)
throw SnapException("Error opening file: '" + filename + "', error: " + cpt::to_string(errno));
}
}
FilePlayer::~FilePlayer()
{
LOG(DEBUG, LOG_TAG) << "Destructor\n";
stop(); // NOLINT
}
bool FilePlayer::needsThread() const
{
return false;
}
void FilePlayer::requestAudio()
{
auto numFrames = static_cast<uint32_t>(stream_->getFormat().msRate() * kDefaultBuffer.count());
auto needed = numFrames * stream_->getFormat().frameSize();
if (buffer_.size() < needed)
buffer_.resize(needed);
if (!stream_->getPlayerChunkOrSilence(buffer_.data(), 10ms, numFrames))
{
// LOG(INFO, LOG_TAG) << "Failed to get chunk. Playing silence.\n";
}
else
{
adjustVolume(static_cast<char*>(buffer_.data()), numFrames);
}
if (file_)
{
fwrite(buffer_.data(), 1, needed, file_.get());
fflush(file_.get());
}
loop();
}
void FilePlayer::loop()
{
next_request_ += kDefaultBuffer;
auto now = std::chrono::steady_clock::now();
if (next_request_ < now)
next_request_ = now + 1ms;
timer_.expires_at(next_request_);
timer_.async_wait([this](boost::system::error_code ec)
{
if (ec)
return;
requestAudio();
});
}
void FilePlayer::start()
{
next_request_ = std::chrono::steady_clock::now();
loop();
}
void FilePlayer::stop()
{
LOG(INFO, LOG_TAG) << "Stop\n";
timer_.cancel();
}
} // namespace player
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