2009-03-13 18:43:16 +01:00
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/*
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2013-04-17 00:12:41 +02:00
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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2009-03-13 18:43:16 +01:00
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* http://www.musicpd.org
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2007-06-13 16:15:30 +02:00
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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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2009-03-13 18:43:16 +01:00
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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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2007-06-13 16:15:30 +02:00
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*/
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2009-11-12 09:12:38 +01:00
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#include "config.h"
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2013-04-17 00:12:41 +02:00
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#include "FifoOutputPlugin.hxx"
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2013-07-30 08:34:10 +02:00
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#include "OutputAPI.hxx"
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2013-05-12 15:03:42 +02:00
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#include "Timer.hxx"
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2013-08-07 10:31:31 +02:00
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#include "system/fd_util.h"
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2010-05-20 06:59:25 +02:00
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#include "open.h"
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2007-06-13 16:15:30 +02:00
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2009-01-01 18:08:29 +01:00
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#include <glib.h>
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2008-10-08 10:49:29 +02:00
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#include <sys/types.h>
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#include <sys/stat.h>
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2009-01-03 14:51:34 +01:00
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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2008-10-08 10:49:29 +02:00
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2008-12-29 17:29:31 +01:00
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "fifo"
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2007-06-13 16:15:30 +02:00
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#define FIFO_BUFFER_SIZE 65536 /* pipe capacity on Linux >= 2.6.11 */
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2013-04-17 00:12:41 +02:00
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struct FifoOutput {
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2011-09-16 23:31:48 +02:00
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struct audio_output base;
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2007-06-13 16:15:30 +02:00
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char *path;
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int input;
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int output;
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2009-02-25 19:53:27 +01:00
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bool created;
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2013-05-12 15:03:42 +02:00
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Timer *timer;
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2013-04-17 00:12:41 +02:00
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FifoOutput()
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:path(nullptr), input(-1), output(-1), created(false) {}
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~FifoOutput() {
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g_free(path);
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}
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2013-08-04 12:25:08 +02:00
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bool Initialize(const config_param ¶m, GError **error_r) {
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2013-04-17 00:12:41 +02:00
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return ao_base_init(&base, &fifo_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 Create(GError **error_r);
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bool Check(GError **error_r);
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void Delete();
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bool Open(GError **error_r);
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void Close();
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2009-02-25 19:53:24 +01:00
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};
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2007-06-13 16:15:30 +02:00
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2009-02-26 22:04:59 +01:00
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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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fifo_output_quark(void)
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{
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return g_quark_from_static_string("fifo_output");
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}
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2013-04-17 00:12:41 +02:00
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inline void
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FifoOutput::Delete()
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2007-06-13 16:15:30 +02:00
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{
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2013-04-17 00:12:41 +02:00
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g_debug("Removing FIFO \"%s\"", path);
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2007-06-13 16:15:30 +02:00
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2013-04-17 00:12:41 +02:00
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if (unlink(path) < 0) {
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2008-12-29 17:29:31 +01:00
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g_warning("Could not remove FIFO \"%s\": %s",
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2013-04-17 00:12:41 +02:00
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path, g_strerror(errno));
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2007-06-13 16:15:30 +02:00
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return;
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}
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2013-04-17 00:12:41 +02:00
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created = false;
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2007-06-13 16:15:30 +02:00
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}
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2013-04-17 00:12:41 +02:00
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void
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FifoOutput::Close()
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2007-06-13 16:15:30 +02:00
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{
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struct stat st;
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2013-04-17 00:12:41 +02:00
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if (input >= 0) {
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close(input);
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input = -1;
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2007-06-13 16:15:30 +02:00
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}
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2013-04-17 00:12:41 +02:00
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if (output >= 0) {
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close(output);
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output = -1;
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2007-06-13 16:15:30 +02:00
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}
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2013-04-17 00:12:41 +02:00
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if (created && (stat(path, &st) == 0))
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Delete();
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2007-06-13 16:15:30 +02:00
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}
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2013-04-17 00:12:41 +02:00
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inline bool
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FifoOutput::Create(GError **error_r)
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2007-06-13 16:15:30 +02:00
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{
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2013-04-17 00:12:41 +02:00
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if (mkfifo(path, 0666) < 0) {
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g_set_error(error_r, fifo_output_quark(), errno,
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2009-02-26 22:04:59 +01:00
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"Couldn't create FIFO \"%s\": %s",
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2013-04-17 00:12:41 +02:00
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path, g_strerror(errno));
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2009-02-25 19:53:27 +01:00
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return false;
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2007-06-13 16:15:30 +02:00
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}
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2013-04-17 00:12:41 +02:00
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created = true;
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2009-02-25 19:53:27 +01:00
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return true;
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2007-06-13 16:15:30 +02:00
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}
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2013-04-17 00:12:41 +02:00
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inline bool
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FifoOutput::Check(GError **error_r)
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2007-06-13 16:15:30 +02:00
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{
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struct stat st;
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2013-04-17 00:12:41 +02:00
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if (stat(path, &st) < 0) {
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2007-06-13 16:15:30 +02:00
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if (errno == ENOENT) {
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/* Path doesn't exist */
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2013-04-17 00:12:41 +02:00
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return Create(error_r);
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2007-06-13 16:15:30 +02:00
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}
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2013-04-17 00:12:41 +02:00
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g_set_error(error_r, fifo_output_quark(), errno,
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2009-02-26 22:04:59 +01:00
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"Failed to stat FIFO \"%s\": %s",
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2013-04-17 00:12:41 +02:00
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path, g_strerror(errno));
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2009-02-25 19:53:27 +01:00
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return false;
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2007-06-13 16:15:30 +02:00
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}
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if (!S_ISFIFO(st.st_mode)) {
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2013-04-17 00:12:41 +02:00
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g_set_error(error_r, fifo_output_quark(), 0,
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2009-02-26 22:04:59 +01:00
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"\"%s\" already exists, but is not a FIFO",
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2013-04-17 00:12:41 +02:00
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path);
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2009-02-25 19:53:27 +01:00
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return false;
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2007-06-13 16:15:30 +02:00
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}
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2009-02-25 19:53:27 +01:00
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return true;
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2007-06-13 16:15:30 +02:00
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}
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2013-04-17 00:12:41 +02:00
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inline bool
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FifoOutput::Open(GError **error_r)
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2007-06-13 16:15:30 +02:00
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{
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2013-04-17 00:12:41 +02:00
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if (!Check(error_r))
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2008-10-29 20:40:27 +01:00
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return false;
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2007-06-13 16:15:30 +02:00
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2013-04-17 00:12:41 +02:00
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input = open_cloexec(path, O_RDONLY|O_NONBLOCK|O_BINARY, 0);
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if (input < 0) {
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g_set_error(error_r, fifo_output_quark(), errno,
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2009-02-26 22:04:59 +01:00
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"Could not open FIFO \"%s\" for reading: %s",
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2013-04-17 00:12:41 +02:00
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path, g_strerror(errno));
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Close();
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2008-10-29 20:40:27 +01:00
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return false;
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2007-06-13 16:15:30 +02:00
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}
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2013-04-17 00:12:41 +02:00
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output = open_cloexec(path, O_WRONLY|O_NONBLOCK|O_BINARY, 0);
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if (output < 0) {
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g_set_error(error_r, fifo_output_quark(), errno,
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2009-02-26 22:04:59 +01:00
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"Could not open FIFO \"%s\" for writing: %s",
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2013-04-17 00:12:41 +02:00
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path, g_strerror(errno));
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Close();
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2008-10-29 20:40:27 +01:00
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return false;
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2007-06-13 16:15:30 +02:00
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}
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2008-10-29 20:40:27 +01:00
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return true;
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2007-06-13 16:15:30 +02:00
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}
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2013-04-17 00:12:41 +02:00
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static bool
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fifo_open(FifoOutput *fd, GError **error_r)
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2007-06-13 16:15:30 +02:00
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{
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2013-04-17 00:12:41 +02:00
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return fd->Open(error_r);
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}
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2007-06-13 16:15:30 +02:00
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2013-04-17 00:12:41 +02:00
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static struct audio_output *
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2013-08-04 12:25:08 +02:00
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fifo_output_init(const config_param ¶m, GError **error_r)
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2013-04-17 00:12:41 +02:00
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{
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GError *error = nullptr;
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2013-08-04 12:25:08 +02:00
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char *path = param.DupBlockPath("path", &error);
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2007-06-13 17:37:46 +02:00
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if (!path) {
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2013-04-17 00:12:41 +02:00
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if (error != nullptr)
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2011-09-09 22:15:28 +02:00
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g_propagate_error(error_r, error);
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else
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g_set_error(error_r, fifo_output_quark(), 0,
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"No \"path\" parameter specified");
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2013-04-17 00:12:41 +02:00
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return nullptr;
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2007-06-13 16:15:30 +02:00
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}
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2013-04-17 00:12:41 +02:00
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FifoOutput *fd = new FifoOutput();
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2007-06-13 17:37:46 +02:00
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fd->path = path;
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2007-06-13 16:15:30 +02:00
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2013-04-17 00:12:41 +02:00
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if (!fd->Initialize(param, error_r)) {
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delete fd;
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return nullptr;
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2011-09-16 23:31:48 +02:00
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}
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2011-09-09 22:15:28 +02:00
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if (!fifo_open(fd, error_r)) {
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2013-04-17 00:12:41 +02:00
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fd->Deinitialize();
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delete fd;
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return nullptr;
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2007-06-13 16:15:30 +02:00
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}
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2011-09-16 23:31:48 +02:00
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return &fd->base;
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2007-06-13 16:15:30 +02:00
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}
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2009-02-25 19:53:24 +01:00
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static void
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2011-09-16 23:31:48 +02:00
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fifo_output_finish(struct audio_output *ao)
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2007-06-13 16:15:30 +02:00
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{
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2013-04-17 00:12:41 +02:00
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FifoOutput *fd = (FifoOutput *)ao;
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2007-06-13 16:15:30 +02:00
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2013-04-17 00:12:41 +02:00
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fd->Close();
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fd->Deinitialize();
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delete fd;
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2007-06-13 16:15:30 +02:00
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}
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2009-02-25 19:53:24 +01:00
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static bool
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2013-08-03 21:00:50 +02:00
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fifo_output_open(struct audio_output *ao, AudioFormat &audio_format,
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2013-08-04 23:48:01 +02:00
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gcc_unused GError **error)
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2007-06-13 16:15:30 +02:00
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{
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2013-04-17 00:12:41 +02:00
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FifoOutput *fd = (FifoOutput *)ao;
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2007-06-13 16:15:30 +02:00
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2013-08-03 21:00:50 +02:00
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fd->timer = new Timer(audio_format);
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2007-06-13 16:15:30 +02:00
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2008-10-29 20:40:27 +01:00
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return true;
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2007-06-13 16:15:30 +02:00
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}
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2009-02-25 19:53:24 +01:00
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static void
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2011-09-16 23:31:48 +02:00
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fifo_output_close(struct audio_output *ao)
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2007-06-13 16:15:30 +02:00
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{
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2013-04-17 00:12:41 +02:00
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FifoOutput *fd = (FifoOutput *)ao;
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2007-06-13 16:15:30 +02:00
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2013-05-12 15:03:42 +02:00
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delete fd->timer;
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2007-06-13 16:15:30 +02:00
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}
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2009-02-25 19:53:24 +01:00
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static void
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2011-09-16 23:31:48 +02:00
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fifo_output_cancel(struct audio_output *ao)
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2007-06-13 16:15:30 +02:00
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{
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2013-04-17 00:12:41 +02:00
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FifoOutput *fd = (FifoOutput *)ao;
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2007-06-13 16:15:30 +02:00
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char buf[FIFO_BUFFER_SIZE];
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int bytes = 1;
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2013-05-12 15:03:42 +02:00
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fd->timer->Reset();
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2007-06-13 16:15:30 +02:00
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while (bytes > 0 && errno != EINTR)
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bytes = read(fd->input, buf, FIFO_BUFFER_SIZE);
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if (bytes < 0 && errno != EAGAIN) {
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2008-12-29 17:29:31 +01:00
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g_warning("Flush of FIFO \"%s\" failed: %s",
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2012-03-06 22:06:08 +01:00
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fd->path, g_strerror(errno));
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2007-06-13 16:15:30 +02:00
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}
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}
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2011-12-13 21:12:48 +01:00
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static unsigned
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fifo_output_delay(struct audio_output *ao)
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{
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2013-04-17 00:12:41 +02:00
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FifoOutput *fd = (FifoOutput *)ao;
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2011-12-13 21:12:48 +01:00
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2013-05-12 15:03:42 +02:00
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return fd->timer->IsStarted()
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? fd->timer->GetDelay()
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2011-12-13 21:12:48 +01:00
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: 0;
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}
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2009-02-23 09:29:56 +01:00
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static size_t
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2011-09-16 23:31:48 +02:00
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fifo_output_play(struct audio_output *ao, const void *chunk, size_t size,
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2009-02-26 22:04:59 +01:00
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GError **error)
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2007-06-13 16:15:30 +02:00
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{
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2013-04-17 00:12:41 +02:00
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FifoOutput *fd = (FifoOutput *)ao;
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2008-04-12 06:15:52 +02:00
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ssize_t bytes;
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2007-06-13 16:15:30 +02:00
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2013-05-12 15:03:42 +02:00
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if (!fd->timer->IsStarted())
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fd->timer->Start();
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fd->timer->Add(size);
|
2007-06-13 16:15:30 +02:00
|
|
|
|
2009-02-23 09:29:56 +01:00
|
|
|
while (true) {
|
2009-02-23 09:34:26 +01:00
|
|
|
bytes = write(fd->output, chunk, size);
|
2009-02-23 09:29:56 +01:00
|
|
|
if (bytes > 0)
|
|
|
|
return (size_t)bytes;
|
|
|
|
|
2007-06-13 16:15:30 +02:00
|
|
|
if (bytes < 0) {
|
|
|
|
switch (errno) {
|
|
|
|
case EAGAIN:
|
|
|
|
/* The pipe is full, so empty it */
|
2011-09-16 23:31:48 +02:00
|
|
|
fifo_output_cancel(&fd->base);
|
2007-06-13 16:15:30 +02:00
|
|
|
continue;
|
|
|
|
case EINTR:
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2009-02-26 22:04:59 +01:00
|
|
|
g_set_error(error, fifo_output_quark(), errno,
|
|
|
|
"Failed to write to FIFO %s: %s",
|
|
|
|
fd->path, g_strerror(errno));
|
2009-02-23 09:29:56 +01:00
|
|
|
return 0;
|
2007-06-13 16:15:30 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-02-25 19:53:24 +01:00
|
|
|
const struct audio_output_plugin fifo_output_plugin = {
|
2013-04-17 00:12:41 +02:00
|
|
|
"fifo",
|
|
|
|
nullptr,
|
|
|
|
fifo_output_init,
|
|
|
|
fifo_output_finish,
|
|
|
|
nullptr,
|
|
|
|
nullptr,
|
|
|
|
fifo_output_open,
|
|
|
|
fifo_output_close,
|
|
|
|
fifo_output_delay,
|
|
|
|
nullptr,
|
|
|
|
fifo_output_play,
|
|
|
|
nullptr,
|
|
|
|
fifo_output_cancel,
|
|
|
|
nullptr,
|
|
|
|
nullptr,
|
2007-06-13 16:15:30 +02:00
|
|
|
};
|