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/*
* Copyright (C) 2003-2014 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 "config/ConfigError.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
#include <string>
#include <stdio.h>
struct PipeOutput {
AudioOutput base;
std::string cmd;
FILE *fh;
PipeOutput()
:base(pipe_output_plugin) {}
bool Configure(const config_param ¶m, Error &error);
static AudioOutput *Create(const config_param ¶m, Error &error);
bool Open(AudioFormat &audio_format, Error &error);
void Close() {
pclose(fh);
}
size_t Play(const void *chunk, size_t size, Error &error);
};
static constexpr Domain pipe_output_domain("pipe_output");
inline bool
PipeOutput::Configure(const config_param ¶m, Error &error)
{
if (!base.Configure(param, error))
return false;
cmd = param.GetBlockValue("command", "");
if (cmd.empty()) {
error.Set(config_domain,
"No \"command\" parameter specified");
return false;
}
return true;
}
inline AudioOutput *
PipeOutput::Create(const config_param ¶m, Error &error)
{
PipeOutput *po = new PipeOutput();
if (!po->Configure(param, error)) {
delete po;
return nullptr;
}
return &po->base;
}
static AudioOutput *
pipe_output_init(const config_param ¶m, Error &error)
{
return PipeOutput::Create(param, error);
}
static void
pipe_output_finish(AudioOutput *ao)
{
PipeOutput *pd = (PipeOutput *)ao;
delete pd;
}
inline bool
PipeOutput::Open(gcc_unused AudioFormat &audio_format, Error &error)
{
fh = popen(cmd.c_str(), "w");
if (fh == nullptr) {
error.FormatErrno("Error opening pipe \"%s\"",
cmd.c_str());
return false;
}
return true;
}
static bool
pipe_output_open(AudioOutput *ao, AudioFormat &audio_format, Error &error)
{
PipeOutput &po = *(PipeOutput *)ao;
return po.Open(audio_format, error);
}
static void
pipe_output_close(AudioOutput *ao)
{
PipeOutput &po = *(PipeOutput *)ao;
po.Close();
}
inline size_t
PipeOutput::Play(const void *chunk, size_t size, Error &error)
{
size_t nbytes = fwrite(chunk, 1, size, fh);
if (nbytes == 0)
error.SetErrno("Write error on pipe");
return nbytes;
}
static size_t
pipe_output_play(AudioOutput *ao, const void *chunk, size_t size,
Error &error)
{
PipeOutput &po = *(PipeOutput *)ao;
return po.Play(chunk, size, error);
}
const struct AudioOutputPlugin pipe_output_plugin = {
"pipe",
nullptr,
pipe_output_init,
pipe_output_finish,
nullptr,
nullptr,
pipe_output_open,
pipe_output_close,
nullptr,
nullptr,
pipe_output_play,
nullptr,
nullptr,
nullptr,
nullptr,
};
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