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/*
* Copyright 2003-2017 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 "PipeOutputPlugin.hxx"
#include "../OutputAPI.hxx"
#include "system/Error.hxx"
#include <string>
#include <stdexcept>
#include <stdio.h>
class PipeOutput final : AudioOutput {
const std::string cmd;
FILE *fh;
PipeOutput(const ConfigBlock &block);
public:
static AudioOutput *Create(EventLoop &,
const ConfigBlock &block) {
return new PipeOutput(block);
}
private:
void Open(AudioFormat &audio_format) override;
void Close() noexcept override {
pclose(fh);
}
size_t Play(const void *chunk, size_t size) override;
};
PipeOutput::PipeOutput(const ConfigBlock &block)
:AudioOutput(0),
cmd(block.GetBlockValue("command", ""))
{
if (cmd.empty())
throw std::runtime_error("No \"command\" parameter specified");
}
inline void
PipeOutput::Open(gcc_unused AudioFormat &audio_format)
{
fh = popen(cmd.c_str(), "w");
if (fh == nullptr)
throw FormatErrno("Error opening pipe \"%s\"", cmd.c_str());
}
inline size_t
PipeOutput::Play(const void *chunk, size_t size)
{
size_t nbytes = fwrite(chunk, 1, size, fh);
if (nbytes == 0)
throw MakeErrno("Write error on pipe");
return nbytes;
}
const struct AudioOutputPlugin pipe_output_plugin = {
"pipe",
nullptr,
&PipeOutput::Create,
nullptr,
};