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-rw-r--r--configure.ac14
-rw-r--r--doc/mpd.conf.511
-rw-r--r--src/Makefile.am1
-rw-r--r--src/audio.c2
-rw-r--r--src/audioOutputs/audioOutput_fifo.c251
5 files changed, 279 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 4c5614df4..890f7c088 100644
--- a/configure.ac
+++ b/configure.ac
@@ -67,6 +67,7 @@ AC_ARG_ENABLE(sun,[ --disable-sun disable sun support (default: enable)],[e
AC_ARG_ENABLE(oss,[ --disable-oss disable OSS support (default: enable)],[enable_oss=$enableval],[enable_oss=yes])
AC_ARG_ENABLE(alsa,[ --disable-alsa disable ALSA support (default: enable)],[enable_alsa=$enableval],[enable_alsa=yes])
AC_ARG_ENABLE(pulse,[ --disable-pulse disable support for the PulseAudio sound server (default: enable)],[enable_pulse=$enableval],[enable_pulse=yes])
+AC_ARG_ENABLE(fifo,[ --enable-fifo enable support for writing audio to a FIFO (default: disable)],[enable_fifo=$enableval],[enable_fifo=no])
AC_ARG_ENABLE(mvp,[ --enable-mvp enable support for Hauppauge Media MVP (default: disable)],[enable_mvp=$enableval],[enable_mvp=no])
AC_ARG_ENABLE(oggvorbis,[ --disable-oggvorbis disable Ogg Vorbis support (default: enable)],[enable_oggvorbis=$enableval],enable_oggvorbis=yes)
AC_ARG_ENABLE(oggflac,[ --disable-oggflac disable OggFLAC support (default: enable)],[enable_oggflac=$enableval],enable_oggflac=yes)
@@ -176,6 +177,12 @@ if test x$enable_pulse = xyes; then
[enable_pulse=no;AC_MSG_WARN([PulseAudio not found -- disabling])])
fi
+if test x$enable_fifo = xyes; then
+ AC_CHECK_FUNC([mkfifo],
+ [enable_fifo=yes;AC_DEFINE([HAVE_FIFO], 1, [Define to enable support for writing audio to a FIFO])],
+ [enable_fifo=no;AC_MSG_WARN([mkfifo not found -- disabling support for writing audio to a FIFO])])
+fi
+
if test x$enable_mvp = xyes; then
AC_DEFINE(HAVE_MVP,1,[Define to enable Hauppauge Media MVP support])
fi
@@ -672,6 +679,12 @@ else
echo " PulseAudio support ............disabled"
fi
+if test x$enable_fifo = xyes; then
+ echo " FIFO support ..................enabled"
+else
+ echo " FIFO support ..................disabled"
+fi
+
if test x$enable_mvp = xyes; then
echo " Media MVP support .............enabled"
else
@@ -693,6 +706,7 @@ if test x$enable_ao = xno &&
test x$enable_alsa = xno &&
test x$enable_osx = xno &&
test x$enable_pulse = xno &&
+ test x$enable_fifo = xno &&
test x$enable_mvp = xno; then
AC_MSG_ERROR("No Audio Output types configured!")
fi
diff --git a/doc/mpd.conf.5 b/doc/mpd.conf.5
index 3dc4b0e2e..9f0fe59f1 100644
--- a/doc/mpd.conf.5
+++ b/doc/mpd.conf.5
@@ -254,6 +254,17 @@ default is "".
This specifies how many bytes to write to the audio device at once. This
parameter is to work around a bug in older versions of libao on sound cards
with very small buffers. The default is 1024.
+.SH REQUIRED FIFO OUTPUT PARAMETERS
+.TP
+.B path <path>
+This specifies the path of the FIFO to output to. Must be an absolute path.
+If the path does not exist it will be created when mpd is started, and removed
+when mpd is stopped. The FIFO will be created with the same user and group as
+mpd is running as. Default permissions can be modified by using the builtin
+shell command "umask". If a FIFO already exists at the specified path it will
+be reused, and will \fBnot\fP be removed when mpd is stopped. You can use the
+"mkfifo" command to create this, and then you may modify the permissions to
+your liking.
.SH REQUIRED SHOUT OUTPUT PARAMETERS
.TP
.B name <name>
diff --git a/src/Makefile.am b/src/Makefile.am
index c22644d27..d4c8d57f2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -6,6 +6,7 @@ mpd_audioOutputs = \
audioOutputs/audioOutput_oss.c \
audioOutputs/audioOutput_osx.c \
audioOutputs/audioOutput_pulse.c \
+ audioOutputs/audioOutput_fifo.c \
audioOutputs/audioOutput_mvp.c \
audioOutputs/audioOutput_shout.c
diff --git a/src/audio.c b/src/audio.c
index 2e8645882..dbec007b8 100644
--- a/src/audio.c
+++ b/src/audio.c
@@ -77,6 +77,7 @@ extern AudioOutputPlugin aoPlugin;
extern AudioOutputPlugin ossPlugin;
extern AudioOutputPlugin osxPlugin;
extern AudioOutputPlugin pulsePlugin;
+extern AudioOutputPlugin fifoPlugin;
extern AudioOutputPlugin mvpPlugin;
extern AudioOutputPlugin shoutPlugin;
@@ -88,6 +89,7 @@ void loadAudioDrivers(void)
loadAudioOutputPlugin(&ossPlugin);
loadAudioOutputPlugin(&osxPlugin);
loadAudioOutputPlugin(&pulsePlugin);
+ loadAudioOutputPlugin(&fifoPlugin);
loadAudioOutputPlugin(&mvpPlugin);
loadAudioOutputPlugin(&shoutPlugin);
}
diff --git a/src/audioOutputs/audioOutput_fifo.c b/src/audioOutputs/audioOutput_fifo.c
new file mode 100644
index 000000000..58bf2c265
--- /dev/null
+++ b/src/audioOutputs/audioOutput_fifo.c
@@ -0,0 +1,251 @@
+/* the Music Player Daemon (MPD)
+ * (c)2003-2006 by Warren Dukes (warren.dukes@gmail.com)
+ * This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "../audioOutput.h"
+
+#include <stdlib.h>
+
+#ifdef HAVE_FIFO
+
+#include "../conf.h"
+#include "../log.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#define FIFO_BUFFER_SIZE 65536 /* pipe capacity on Linux >= 2.6.11 */
+
+typedef struct _FifoData {
+ char *path;
+ int input;
+ int output;
+ int created;
+} FifoData;
+
+static FifoData *newFifoData()
+{
+ FifoData *ret;
+
+ ret = malloc(sizeof(FifoData));
+
+ ret->path = NULL;
+ ret->input = -1;
+ ret->output = -1;
+ ret->created = 0;
+
+ return ret;
+}
+
+static void freeFifoData(FifoData *fd)
+{
+ if (fd->path) free(fd->path);
+ free(fd);
+}
+
+static int makeFifo(FifoData *fd)
+{
+ if (mkfifo(fd->path, 0666) < 0) {
+ ERROR("Couldn't create FIFO \"%s\": %s\n", fd->path,
+ strerror(errno));
+ return -1;
+ }
+
+ fd->created = 1;
+
+ return 0;
+}
+
+static int checkFifo(FifoData *fd)
+{
+ struct stat info;
+
+ if (stat(fd->path, &info) < 0) {
+ if (errno == ENOENT) {
+ /* Path doesn't exist */
+ return makeFifo(fd);
+ }
+
+ ERROR("Failed to stat FIFO \"%s\": %s\n", fd->path,
+ strerror(errno));
+ return -1;
+ }
+
+ if (!S_ISFIFO(info.st_mode)) {
+ ERROR("\"%s\" already exists, but is not a FIFO\n", fd->path);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int openFifo(FifoData *fd)
+{
+ if (checkFifo(fd) < 0) return -1;
+
+ fd->input = open(fd->path, O_RDONLY|O_NONBLOCK);
+ if (fd->input < 0) {
+ ERROR("Could not open FIFO \"%s\" for reading: %s\n", fd->path,
+ strerror(errno));
+ return -1;
+ }
+
+ fd->output = open(fd->path, O_WRONLY|O_NONBLOCK);
+ if (fd->output < 0) {
+ ERROR("Could not open FIFO \"%s\" for writing: %s\n", fd->path,
+ strerror(errno));
+ return -1;
+ }
+
+ return 0;
+}
+
+static void removeFifo(FifoData *fd)
+{
+ DEBUG("Removing FIFO \"%s\"\n", fd->path);
+ if (unlink(fd->path) < 0) {
+ ERROR("Could not remove FIFO \"%s\": %s\n", fd->path,
+ strerror(errno));
+ return;
+ }
+
+ fd->created = 0;
+}
+
+static void closeFifo(FifoData *fd)
+{
+ struct stat info;
+
+ if (fd->input >= 0) close(fd->input);
+ if (fd->output >= 0) close(fd->output);
+ if (fd->created && (stat(fd->path, &info) == 0)) removeFifo(fd);
+}
+
+static int fifo_initDriver(AudioOutput *audioOutput, ConfigParam *param)
+{
+ BlockParam *path = NULL;
+ FifoData *fd;
+
+ if (param) path = getBlockParam(param, "path");
+
+ if (!path) {
+ ERROR("No \"path\" parameter specified for fifo output "
+ "defined at line %i\n", param->line);
+ exit(EXIT_FAILURE);
+ }
+
+ if (path->value[0] != '/') {
+ ERROR("\"path\" parameter for fifo output is not an absolute "
+ "path at line %i\n", param->line);
+ exit(EXIT_FAILURE);
+ }
+
+ fd = newFifoData();
+ fd->path = strdup(path->value);
+ audioOutput->data = fd;
+
+ if (openFifo(fd) < 0) {
+ freeFifoData(fd);
+ return -1;
+ }
+
+ return 0;
+}
+
+static void fifo_finishDriver(AudioOutput *audioOutput)
+{
+ FifoData *fd;
+
+ fd = audioOutput->data;
+ closeFifo(fd);
+ freeFifoData(fd);
+}
+
+static int fifo_openDevice(AudioOutput *audioOutput)
+{
+ audioOutput->open = 1;
+ return 0;
+}
+
+static void fifo_dropBufferedAudio(AudioOutput *audioOutput)
+{
+ FifoData *fd;
+ char buf[FIFO_BUFFER_SIZE];
+ int bytes = 1;
+
+ fd = audioOutput->data;
+
+ while (bytes > 0) bytes = read(fd->input, buf, FIFO_BUFFER_SIZE);
+ if (bytes < 0 && errno != EAGAIN) {
+ WARNING("Flush of FIFO \"%s\" failed: %s\n", fd->path,
+ strerror(errno));
+ }
+}
+
+static void fifo_closeDevice(AudioOutput *audioOutput)
+{
+ audioOutput->open = 0;
+}
+
+static int fifo_playAudio(AudioOutput *audioOutput, char *playChunk, int size)
+{
+ FifoData *fd;
+ int bytes;
+ int offset = 0;
+
+ fd = audioOutput->data;
+
+ while (1) {
+ bytes = write(fd->output, &playChunk[offset], size);
+ if (bytes < 0 && errno == EAGAIN) {
+ fifo_dropBufferedAudio(audioOutput);
+ } else if (bytes < 0) {
+ ERROR("Closing FIFO output \"%s\" due to write error: "
+ "%s\n", fd->path, strerror(errno));
+ fifo_closeDevice(audioOutput);
+ return -1;
+ } else if (bytes < size) {
+ size -= bytes;
+ offset += bytes;
+ } else {
+ break;
+ }
+ }
+
+ return 0;
+}
+
+AudioOutputPlugin fifoPlugin = {
+ "fifo",
+ NULL, /* testDefaultDeviceFunc */
+ fifo_initDriver,
+ fifo_finishDriver,
+ fifo_openDevice,
+ fifo_playAudio,
+ fifo_dropBufferedAudio,
+ fifo_closeDevice,
+ NULL, /* sendMetadataFunc */
+};
+
+#else /* HAVE_FIFO */
+
+DISABLED_AUDIO_OUTPUT_PLUGIN(fifoPlugin)
+
+#endif /* HAVE_FIFO */
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-06 20:47:03 +0000