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