83 lines
2.0 KiB
C++
83 lines
2.0 KiB
C++
/*
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* Copyright 2003-2021 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "PipeOutputPlugin.hxx"
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#include "../OutputAPI.hxx"
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#include "system/Error.hxx"
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#include <string>
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#include <stdexcept>
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#include <stdio.h>
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class PipeOutput final : AudioOutput {
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const std::string cmd;
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FILE *fh;
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explicit PipeOutput(const ConfigBlock &block);
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public:
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static AudioOutput *Create(EventLoop &,
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const ConfigBlock &block) {
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return new PipeOutput(block);
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}
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private:
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void Open(AudioFormat &audio_format) override;
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void Close() noexcept override {
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pclose(fh);
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}
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size_t Play(const void *chunk, size_t size) override;
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};
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PipeOutput::PipeOutput(const ConfigBlock &block)
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:AudioOutput(0),
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cmd(block.GetBlockValue("command", ""))
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{
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if (cmd.empty())
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throw std::runtime_error("No \"command\" parameter specified");
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}
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inline void
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PipeOutput::Open([[maybe_unused]] AudioFormat &audio_format)
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{
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fh = popen(cmd.c_str(), "w");
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if (fh == nullptr)
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throw FormatErrno("Error opening pipe \"%s\"", cmd.c_str());
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}
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inline size_t
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PipeOutput::Play(const void *chunk, size_t size)
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{
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size_t nbytes = fwrite(chunk, 1, size, fh);
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if (nbytes == 0)
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throw MakeErrno("Write error on pipe");
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return nbytes;
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}
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const struct AudioOutputPlugin pipe_output_plugin = {
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"pipe",
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nullptr,
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&PipeOutput::Create,
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nullptr,
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};
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