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-rw-r--r--src/Makefile.am3
-rw-r--r--src/audio.c1
-rw-r--r--src/audioOutput.h1
-rw-r--r--src/audioOutputs/audioOutput_fifo.c299
4 files changed, 303 insertions, 1 deletions
diff --git a/src/Makefile.am b/src/Makefile.am
index b755ec288..88733be26 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -2,14 +2,15 @@ bin_PROGRAMS = mpd
SUBDIRS = $(MP4FF_SUBDIR)
mpd_audioOutputs = \
+ audioOutputs/audioOutput_shout.c \
audioOutputs/audioOutput_null.c \
+ audioOutputs/audioOutput_fifo.c \
audioOutputs/audioOutput_alsa.c \
audioOutputs/audioOutput_ao.c \
audioOutputs/audioOutput_oss.c \
audioOutputs/audioOutput_osx.c \
audioOutputs/audioOutput_pulse.c \
audioOutputs/audioOutput_mvp.c \
- audioOutputs/audioOutput_shout.c \
audioOutputs/audioOutput_jack.c
mpd_inputPlugins = \
diff --git a/src/audio.c b/src/audio.c
index 906382421..96712d713 100644
--- a/src/audio.c
+++ b/src/audio.c
@@ -94,6 +94,7 @@ void loadAudioDrivers(void)
initAudioOutputPlugins();
loadAudioOutputPlugin(&shoutPlugin);
loadAudioOutputPlugin(&nullPlugin);
+ loadAudioOutputPlugin(&fifoPlugin);
loadAudioOutputPlugin(&alsaPlugin);
loadAudioOutputPlugin(&aoPlugin);
loadAudioOutputPlugin(&ossPlugin);
diff --git a/src/audioOutput.h b/src/audioOutput.h
index 7b30c4c09..1591c814a 100644
--- a/src/audioOutput.h
+++ b/src/audioOutput.h
@@ -107,6 +107,7 @@ void printAllOutputPluginTypes(FILE * fp);
extern AudioOutputPlugin shoutPlugin;
extern AudioOutputPlugin nullPlugin;
+extern AudioOutputPlugin fifoPlugin;
extern AudioOutputPlugin alsaPlugin;
extern AudioOutputPlugin aoPlugin;
extern AudioOutputPlugin ossPlugin;
diff --git a/src/audioOutputs/audioOutput_fifo.c b/src/audioOutputs/audioOutput_fifo.c
new file mode 100644
index 000000000..2fbbf5393
--- /dev/null
+++ b/src/audioOutputs/audioOutput_fifo.c
@@ -0,0 +1,299 @@
+/* the Music Player Daemon (MPD)
+ * Copyright (C) 2003-2007 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 "../log.h"
+#include "../conf.h"
+#include "../utils.h"
+#include "../timer.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#define FIFO_BUFFER_SIZE 65536 /* pipe capacity on Linux >= 2.6.11 */
+
+typedef struct _FifoData {
+ char *path;
+ int input;
+ int output;
+ int created;
+ Timer *timer;
+} FifoData;
+
+static FifoData *newFifoData()
+{
+ FifoData *ret;
+
+ ret = xmalloc(sizeof(FifoData));
+
+ ret->path = NULL;
+ ret->input = -1;
+ ret->output = -1;
+ ret->created = 0;
+ ret->timer = NULL;
+
+ return ret;
+}
+
+static void freeFifoData(FifoData *fd)
+{
+ if (fd->path)
+ free(fd->path);
+
+ if (fd->timer)
+ timer_free(fd->timer);
+
+ free(fd);
+}
+
+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 st;
+
+ if (fd->input >= 0) {
+ close(fd->input);
+ fd->input = -1;
+ }
+
+ if (fd->output >= 0) {
+ close(fd->output);
+ fd->output = -1;
+ }
+
+ if (fd->created && (stat(fd->path, &st) == 0))
+ removeFifo(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 st;
+
+ if (stat(fd->path, &st) < 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(st.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));
+ closeFifo(fd);
+ 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));
+ closeFifo(fd);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int fifo_initDriver(AudioOutput *audioOutput, ConfigParam *param)
+{
+ FifoData *fd;
+ BlockParam *path = NULL;
+
+ if (param)
+ path = getBlockParam(param, "path");
+
+ if (!path) {
+ FATAL("No \"path\" parameter specified for fifo output "
+ "defined at line %i\n", param->line);
+ }
+
+ if (path->value[0] != '/') {
+ FATAL("\"path\" parameter for fifo output is not an absolute "
+ "path at line %i\n", param->line);
+ }
+
+ fd = newFifoData();
+ fd->path = xstrdup(path->value);
+ audioOutput->data = fd;
+
+ if (openFifo(fd) < 0) {
+ freeFifoData(fd);
+ return -1;
+ }
+
+ return 0;
+}
+
+static void fifo_finishDriver(AudioOutput *audioOutput)
+{
+ FifoData *fd = (FifoData *)audioOutput->data;
+
+ closeFifo(fd);
+ freeFifoData(fd);
+}
+
+static int fifo_openDevice(AudioOutput *audioOutput)
+{
+ FifoData *fd = (FifoData *)audioOutput->data;
+
+ if (fd->timer)
+ timer_free(fd->timer);
+
+ fd->timer = timer_new(&audioOutput->outAudioFormat);
+
+ audioOutput->open = 1;
+
+ return 0;
+}
+
+static void fifo_closeDevice(AudioOutput *audioOutput)
+{
+ FifoData *fd = (FifoData *)audioOutput->data;
+
+ if (fd->timer) {
+ timer_free(fd->timer);
+ fd->timer = NULL;
+ }
+
+ audioOutput->open = 0;
+}
+
+static void fifo_dropBufferedAudio(AudioOutput *audioOutput)
+{
+ FifoData *fd = (FifoData *)audioOutput->data;
+ char buf[FIFO_BUFFER_SIZE];
+ int bytes = 1;
+
+ timer_reset(fd->timer);
+
+ while (bytes > 0 && errno != EINTR)
+ 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 int fifo_playAudio(AudioOutput *audioOutput, char *playChunk, int size)
+{
+ FifoData *fd = (FifoData *)audioOutput->data;
+ int offset = 0;
+ int bytes;
+
+ if (!fd->timer->started)
+ timer_start(fd->timer);
+ else
+ timer_sync(fd->timer);
+
+ timer_add(fd->timer, size);
+
+ while (size) {
+ bytes = write(fd->output, playChunk + offset, size);
+ if (bytes < 0) {
+ switch (errno) {
+ case EAGAIN:
+ /* The pipe is full, so empty it */
+ fifo_dropBufferedAudio(audioOutput);
+ continue;
+ case EINTR:
+ continue;
+ }
+
+ ERROR("Closing FIFO output \"%s\" due to write error: "
+ "%s\n", fd->path, strerror(errno));
+ fifo_closeDevice(audioOutput);
+ return -1;
+ }
+
+ size -= bytes;
+ offset += bytes;
+ }
+
+ 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 2024-11-08 20:39:13 +0000