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