/* * Copyright (C) 2003-2009 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 "output_api.h" #include <stdio.h> #include <errno.h> struct pipe_output { char *cmd; FILE *fh; }; /** * The quark used for GError.domain. */ static inline GQuark pipe_output_quark(void) { return g_quark_from_static_string("pipe_output"); } static void * pipe_output_init(G_GNUC_UNUSED const struct audio_format *audio_format, const struct config_param *param, GError **error) { struct pipe_output *pd = g_new(struct pipe_output, 1); pd->cmd = config_dup_block_string(param, "command", NULL); if (pd->cmd == NULL) { g_set_error(error, pipe_output_quark(), 0, "No \"command\" parameter specified"); return NULL; } return pd; } static void pipe_output_finish(void *data) { struct pipe_output *pd = data; g_free(pd->cmd); g_free(pd); } static bool pipe_output_open(void *data, G_GNUC_UNUSED struct audio_format *audio_format, G_GNUC_UNUSED GError **error) { struct pipe_output *pd = data; pd->fh = popen(pd->cmd, "w"); if (pd->fh == NULL) { g_set_error(error, pipe_output_quark(), errno, "Error opening pipe \"%s\": %s", pd->cmd, g_strerror(errno)); return false; } return true; } static void pipe_output_close(void *data) { struct pipe_output *pd = data; pclose(pd->fh); } static size_t pipe_output_play(void *data, const void *chunk, size_t size, GError **error) { struct pipe_output *pd = data; size_t ret; ret = fwrite(chunk, 1, size, pd->fh); if (ret == 0) g_set_error(error, pipe_output_quark(), errno, "Write error on pipe: %s", g_strerror(errno)); return ret; } const struct audio_output_plugin pipe_output_plugin = { .name = "pipe", .init = pipe_output_init, .finish = pipe_output_finish, .open = pipe_output_open, .close = pipe_output_close, .play = pipe_output_play, };