153 lines
3.2 KiB
C++
153 lines
3.2 KiB
C++
/*
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* Copyright (C) 2003-2013 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 <stdio.h>
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#include <errno.h>
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struct PipeOutput {
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struct audio_output base;
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char *cmd;
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FILE *fh;
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bool Initialize(const config_param ¶m, GError **error_r) {
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return ao_base_init(&base, &pipe_output_plugin, param,
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error_r);
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}
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void Deinitialize() {
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ao_base_finish(&base);
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}
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bool Configure(const config_param ¶m, GError **error_r);
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};
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/**
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* The quark used for GError.domain.
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*/
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static inline GQuark
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pipe_output_quark(void)
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{
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return g_quark_from_static_string("pipe_output");
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}
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inline bool
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PipeOutput::Configure(const config_param ¶m, GError **error_r)
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{
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cmd = param.DupBlockString("command");
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if (cmd == nullptr) {
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g_set_error(error_r, pipe_output_quark(), 0,
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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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static struct audio_output *
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pipe_output_init(const config_param ¶m, GError **error_r)
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{
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PipeOutput *pd = new PipeOutput();
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if (!pd->Initialize(param, error_r)) {
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delete pd;
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return nullptr;
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}
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if (!pd->Configure(param, error_r)) {
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pd->Deinitialize();
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delete pd;
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return nullptr;
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}
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return &pd->base;
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}
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static void
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pipe_output_finish(struct audio_output *ao)
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{
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PipeOutput *pd = (PipeOutput *)ao;
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g_free(pd->cmd);
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pd->Deinitialize();
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delete pd;
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}
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static bool
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pipe_output_open(struct audio_output *ao,
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gcc_unused AudioFormat &audio_format,
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gcc_unused GError **error)
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{
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PipeOutput *pd = (PipeOutput *)ao;
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pd->fh = popen(pd->cmd, "w");
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if (pd->fh == nullptr) {
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g_set_error(error, pipe_output_quark(), errno,
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"Error opening pipe \"%s\": %s",
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pd->cmd, g_strerror(errno));
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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 void
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pipe_output_close(struct audio_output *ao)
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{
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PipeOutput *pd = (PipeOutput *)ao;
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pclose(pd->fh);
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}
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static size_t
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pipe_output_play(struct audio_output *ao, const void *chunk, size_t size, GError **error)
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{
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PipeOutput *pd = (PipeOutput *)ao;
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size_t ret;
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ret = fwrite(chunk, 1, size, pd->fh);
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if (ret == 0)
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g_set_error(error, pipe_output_quark(), errno,
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"Write error on pipe: %s", g_strerror(errno));
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return ret;
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}
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const struct audio_output_plugin 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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