Add timitity midi render plugin (#403992)

Original commit message from CVS:
Patch by: Wouter Paesen <wouter@blue-gate.be>
* configure.ac:
* ext/Makefile.am:
* ext/timidity/Makefile.am:
* ext/timidity/gsttimidity.c: (gst_timidity_base_init),
(gst_timidity_class_init), (gst_timidity_init),
(gst_timidity_set_song_options), (gst_timidity_src_convert),
(gst_timidity_src_query), (gst_timidity_get_upstream_size),
(gst_timidity_get_segment), (gst_timidity_get_new_segment_event),
(gst_timidity_src_event), (gst_timidity_activate),
(gst_timidity_activatepull), (gst_timidity_allocate_buffer),
(gst_timidity_clip_buffer), (gst_timidity_fill_buffer),
(gst_timidity_get_buffer), (gst_timidity_loop),
(gst_timidity_change_state), (gst_timidity_typefind),
(plugin_init):
* ext/timidity/gsttimidity.h:
Add timitity midi render plugin (#403992)

4 files changed, 912 insertions, 1 deletions

diff --git a/ext/Makefile.am b/ext/Makefile.am
index 4e960c8e..37b5fc19 100644
--- a/ext/Makefile.am
+++ b/ext/Makefile.am
@@ -178,6 +178,12 @@ else
 NEON_DIR=
 endif
 
+if USE_TIMIDITY
+TIMIDITY_DIR=timidity
+else
+TIMIDITY_DIR=
+endif
+
 # if USE_POLYP
 # POLYP_DIR=polyp
 # else
@@ -232,7 +238,6 @@ else
 THEORA_DIR =
 endif
 
-
 # if USE_TARKIN
 # TARKIN_DIR=tarkin
 # else
@@ -291,6 +296,7 @@ SUBDIRS=\
 	$(SWFDEC_DIR) \
 	$(TARKIN_DIR) \
 	$(THEORA_DIR) \
+	$(TIMIDITY_DIR)
 	$(WAVPACK_DIR) \
 	$(XINE_DIR) \
 	$(XVID_DIR)
@@ -321,5 +327,6 @@ DIST_SUBDIRS= \
 	spc \
 	swfdec \
 	theora \
+	timidity \
 	wavpack \
 	xvid
diff --git a/ext/timidity/Makefile.am b/ext/timidity/Makefile.am
new file mode 100644
index 00000000..a88aae32
--- /dev/null
+++ b/ext/timidity/Makefile.am
@@ -0,0 +1,17 @@
+# plugindir is set in configure
+
+# change libgstplugin.la to something more suitable
+plugin_LTLIBRARIES = libgsttimidity.la
+
+# for the next set of variables, rename the prefix if you renamed the .la
+
+# sources used to compile this plug-in
+libgsttimidity_la_SOURCES = gsttimidity.c
+
+# flags used to compile this plugin
+# add other _CFLAGS and _LIBS as needed
+libgsttimidity_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) $(TIMIDITY_CFLAGS)
+libgsttimidity_la_LIBADD = $(GST_LIBS) $(GST_BASE_LIBS) $(TIMIDITY_LIBS)
+libgsttimidity_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
+noinst_HEADERS = gsttimidity.h
diff --git a/ext/timidity/gsttimidity.c b/ext/timidity/gsttimidity.c
new file mode 100644
index 00000000..f8cc0af9
--- /dev/null
+++ b/ext/timidity/gsttimidity.c
@@ -0,0 +1,805 @@
+/*
+ * gsttimdity - timidity plugin for gstreamer
+ * 
+ * Copyright 2007 Wouter Paesen <wouter@blue-gate.be>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <gst/gst.h>
+#include <string.h>
+
+#include "gsttimidity.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_timidity_debug);
+#define GST_CAT_DEFAULT gst_timidity_debug
+
+static const GstElementDetails gst_timidity_details =
+GST_ELEMENT_DETAILS ("Timidity",
+    "Codec/Decoder/Audio",
+    "Midi Synthesizer Element",
+    "Wouter Paesen <wouter@blue-gate.be>");
+
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0,
+  /* FILL ME */
+};
+
+static void gst_timidity_base_init (gpointer g_class);
+static void gst_timidity_class_init (GstTimidityClass * klass);
+
+static gboolean gst_timidity_src_event (GstPad * pad, GstEvent * event);
+static GstStateChangeReturn gst_timidity_change_state (GstElement * element,
+    GstStateChange transition);
+static gboolean gst_timidity_activate (GstPad * pad);
+static gboolean gst_timidity_activatepull (GstPad * pad, gboolean active);
+static void gst_timidity_loop (GstPad * sinkpad);
+static gboolean gst_timidity_src_query (GstPad * pad, GstQuery * query);
+static gboolean gst_timidity_set_song_options (GstTimidity * timidity,
+    MidSongOptions * options);
+
+static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/midi")
+    );
+
+static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-raw-int, "
+        "rate = (int) 44100, "
+        "channels = (int) 2, "
+        "endianness = (int) LITTLE_ENDIAN, "
+        "width = (int) 16, " "depth = (int) 16, " "signed = (boolean) true"));
+
+GST_BOILERPLATE (GstTimidity, gst_timidity, GstElement, GST_TYPE_ELEMENT);
+
+static void
+gst_timidity_base_init (gpointer gclass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&src_factory));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&sink_factory));
+  gst_element_class_set_details (element_class, &gst_timidity_details);
+}
+
+/* initialize the plugin's class */
+static void
+gst_timidity_class_init (GstTimidityClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+
+  gstelement_class->change_state = gst_timidity_change_state;
+}
+
+/* initialize the new element
+ * instantiate pads and add them to element
+ * set functions
+ * initialize structure
+ */
+static void
+gst_timidity_init (GstTimidity * filter, GstTimidityClass * g_class)
+{
+  GstElementClass *klass = GST_ELEMENT_GET_CLASS (filter);
+
+  filter->sinkpad =
+      gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
+          "sink"), "sink");
+
+  gst_pad_set_activatepull_function (filter->sinkpad,
+      gst_timidity_activatepull);
+  gst_pad_set_activate_function (filter->sinkpad, gst_timidity_activate);
+  gst_pad_set_setcaps_function (filter->sinkpad, gst_pad_set_caps);
+  gst_pad_use_fixed_caps (filter->sinkpad);
+  gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
+
+  filter->srcpad =
+      gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
+          "src"), "src");
+
+  gst_pad_set_query_function (filter->srcpad, gst_timidity_src_query);
+  gst_pad_set_event_function (filter->srcpad, gst_timidity_src_event);
+  gst_pad_use_fixed_caps (filter->srcpad);
+  gst_pad_set_setcaps_function (filter->srcpad, gst_pad_set_caps);
+
+  gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
+
+  filter->song_options->buffer_size = 2048;
+  filter->song_options->rate = 44100;
+  filter->song_options->format = MID_AUDIO_S16LSB;
+  filter->song_options->channels = 2;
+
+  gst_timidity_set_song_options (filter, filter->song_options);
+
+  gst_segment_init (filter->o_segment, GST_FORMAT_DEFAULT);
+}
+
+static gboolean
+gst_timidity_set_song_options (GstTimidity * timidity, MidSongOptions * options)
+{
+  gint64 bps;
+
+  switch (options->format) {
+    case MID_AUDIO_U8:
+    case MID_AUDIO_S8:
+      bps = 1;
+      break;
+    case MID_AUDIO_U16LSB:
+    case MID_AUDIO_S16LSB:
+    case MID_AUDIO_U16MSB:
+    case MID_AUDIO_S16MSB:
+      bps = 2;
+      break;
+    default:
+      return FALSE;
+  }
+
+  bps *= options->channels;
+
+  if (options != timidity->song_options)
+    memcpy (timidity->song_options, options, sizeof (MidSongOptions));
+
+  timidity->bytes_per_frame = bps;
+  timidity->time_per_frame = GST_SECOND / (GstClockTime) options->rate;
+
+  return TRUE;
+}
+
+static gboolean
+gst_timidity_src_convert (GstTimidity * timidity,
+    GstFormat src_format, gint64 src_value,
+    GstFormat * dest_format, gint64 * dest_value)
+{
+  gboolean res = TRUE;
+  gint64 frames;
+
+  if (src_format == *dest_format) {
+    *dest_value = src_value;
+    goto done;
+  }
+
+  switch (src_format) {
+    case GST_FORMAT_TIME:
+      frames = src_value / timidity->time_per_frame;
+      break;
+    case GST_FORMAT_BYTES:
+      frames = src_value / (timidity->bytes_per_frame);
+      break;
+    case GST_FORMAT_DEFAULT:
+      frames = src_value;
+      break;
+    default:
+      res = FALSE;
+      goto done;
+  }
+
+  switch (*dest_format) {
+    case GST_FORMAT_TIME:
+      *dest_value = frames * timidity->time_per_frame;
+      break;
+    case GST_FORMAT_BYTES:
+      *dest_value = frames * timidity->bytes_per_frame;
+      break;
+    case GST_FORMAT_DEFAULT:
+      *dest_value = frames;
+      break;
+    default:
+      res = FALSE;
+      break;
+  }
+
+done:
+  return res;
+}
+
+static gboolean
+gst_timidity_src_query (GstPad * pad, GstQuery * query)
+{
+  gboolean res = TRUE;
+  GstTimidity *timidity = GST_TIMIDITY (gst_pad_get_parent (pad));
+  GstFormat src_format, dst_format;
+  gint64 src_value, dst_value;
+
+  if (!timidity->song) {
+    gst_object_unref (timidity);
+    return FALSE;
+  }
+
+  switch (GST_QUERY_TYPE (query)) {
+    case GST_QUERY_DURATION:
+      gst_query_set_duration (query, GST_FORMAT_TIME,
+          GST_MSECOND * (gint64) mid_song_get_total_time (timidity->song));
+      break;
+    case GST_QUERY_POSITION:
+      gst_query_set_position (query, GST_FORMAT_TIME,
+          timidity->o_segment->last_stop * timidity->time_per_frame);
+      break;
+    case GST_QUERY_CONVERT:
+      gst_query_parse_convert (query, &src_format, &src_value,
+          &dst_format, NULL);
+
+      res =
+          gst_timidity_src_convert (timidity, src_format, src_value,
+          &dst_format, &dst_value);
+      if (res)
+        gst_query_set_convert (query, src_format, src_value, dst_format,
+            dst_value);
+
+      break;
+    case GST_QUERY_FORMATS:
+      gst_query_set_formats (query, 3,
+          GST_FORMAT_TIME, GST_FORMAT_BYTES, GST_FORMAT_DEFAULT);
+      break;
+    case GST_QUERY_SEGMENT:
+      gst_query_set_segment (query, timidity->o_segment->rate,
+          timidity->o_segment->format, timidity->o_segment->start,
+          timidity->o_segment->stop);
+      break;
+    case GST_QUERY_SEEKING:
+      gst_query_set_seeking (query, timidity->o_segment->format,
+          TRUE, 0, timidity->o_len);
+      break;
+    default:
+      res = FALSE;
+      break;
+  }
+
+  gst_object_unref (timidity);
+  return res;
+}
+
+static gboolean
+gst_timidity_get_upstream_size (GstTimidity * timidity, gint64 * size)
+{
+  GstFormat format = GST_FORMAT_BYTES;
+  gboolean res = FALSE;
+  GstPad *peer = gst_pad_get_peer (timidity->sinkpad);
+
+  if (peer != NULL)
+    res = gst_pad_query_duration (peer, &format, size) && *size >= 0;
+
+  gst_object_unref (peer);
+  return res;
+}
+
+static GstSegment *
+gst_timidity_get_segment (GstTimidity * timidity, GstFormat format,
+    gboolean update)
+{
+  gint64 start, stop, time;
+
+  GstSegment *segment = gst_segment_new ();
+
+  gst_timidity_src_convert (timidity,
+      timidity->o_segment->format, timidity->o_segment->start, &format, &start);
+
+  if (timidity->o_segment->stop == GST_CLOCK_TIME_NONE) {
+    stop = GST_CLOCK_TIME_NONE;
+  } else {
+    gst_timidity_src_convert (timidity,
+        timidity->o_segment->format, timidity->o_segment->stop, &format, &stop);
+  }
+
+  gst_timidity_src_convert (timidity,
+      timidity->o_segment->format, timidity->o_segment->time, &format, &time);
+
+  gst_segment_set_newsegment_full (segment, update,
+      timidity->o_segment->rate, timidity->o_segment->applied_rate,
+      format, start, stop, time);
+
+  segment->last_stop = time;
+
+  return segment;
+}
+
+static GstEvent *
+gst_timidity_get_new_segment_event (GstTimidity * timidity, GstFormat format,
+    gboolean update)
+{
+  GstSegment *segment;
+  GstEvent *event;
+
+  segment = gst_timidity_get_segment (timidity, format, update);
+
+  event = gst_event_new_new_segment_full (update,
+      segment->rate, segment->applied_rate, segment->format,
+      segment->start, segment->stop, segment->time);
+
+  gst_segment_free (segment);
+
+  return event;
+}
+
+static gboolean
+gst_timidity_src_event (GstPad * pad, GstEvent * event)
+{
+  gboolean res = FALSE;
+  GstTimidity *timidity = GST_TIMIDITY (gst_pad_get_parent (pad));
+
+  GST_DEBUG_OBJECT (pad, "%s event received", GST_EVENT_TYPE_NAME (event));
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_SEEK:
+    {
+      gdouble rate;
+      GstFormat src_format, dst_format;
+      GstSeekFlags flags;
+      GstSeekType start_type, stop_type;
+      gint64 orig_start, start, stop;
+      gboolean flush, update;
+
+      if (!timidity->song)
+        break;
+
+      gst_event_parse_seek (event, &rate, &src_format, &flags,
+          &start_type, &orig_start, &stop_type, &stop);
+
+      dst_format = GST_FORMAT_DEFAULT;
+
+      gst_timidity_src_convert (timidity, src_format, orig_start,
+          &dst_format, &start);
+      gst_timidity_src_convert (timidity, src_format, stop, &dst_format, &stop);
+
+      flush = ((flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH);
+
+      if (flush) {
+        GST_DEBUG ("performing flush");
+        gst_pad_push_event (timidity->srcpad, gst_event_new_flush_start ());
+      } else {
+        gst_pad_stop_task (timidity->sinkpad);
+      }
+
+      GST_PAD_STREAM_LOCK (timidity->sinkpad);
+
+      if (flush) {
+        gst_pad_push_event (timidity->srcpad, gst_event_new_flush_stop ());
+      }
+
+      gst_segment_set_seek (timidity->o_segment, rate, dst_format, flags,
+          start_type, start, stop_type, stop, &update);
+
+      if ((flags && GST_SEEK_FLAG_SEGMENT) == GST_SEEK_FLAG_SEGMENT) {
+        GST_DEBUG_OBJECT (timidity, "received segment seek %d, %d",
+            (gint) start_type, (gint) stop_type);
+      } else {
+        GST_DEBUG_OBJECT (timidity, "received normal seek %d",
+            (gint) start_type);
+        update = FALSE;
+      }
+
+      gst_pad_push_event (timidity->srcpad,
+          gst_timidity_get_new_segment_event (timidity, GST_FORMAT_TIME,
+              update));
+
+      timidity->o_seek = TRUE;
+
+      gst_pad_start_task (timidity->sinkpad,
+          (GstTaskFunction) gst_timidity_loop, timidity->sinkpad);
+
+      GST_PAD_STREAM_UNLOCK (timidity->sinkpad);
+      GST_DEBUG ("seek done");
+    }
+      res = TRUE;
+      break;
+    default:
+      break;
+  }
+
+  g_object_unref (timidity);
+  return res;
+}
+
+static gboolean
+gst_timidity_activate (GstPad * sinkpad)
+{
+  if (gst_pad_check_pull_range (sinkpad))
+    return gst_pad_activate_pull (sinkpad, TRUE);
+
+  return FALSE;
+}
+
+static gboolean
+gst_timidity_activatepull (GstPad * pad, gboolean active)
+{
+  if (active) {
+    return gst_pad_start_task (pad, (GstTaskFunction) gst_timidity_loop, pad);
+  } else {
+    return gst_pad_stop_task (pad);
+  }
+}
+
+static GstBuffer *
+gst_timidity_allocate_buffer (GstTimidity * timidity, gint64 samples)
+{
+  return gst_buffer_new_and_alloc (samples * timidity->bytes_per_frame);
+}
+
+static GstBuffer *
+gst_timidity_clip_buffer (GstTimidity * timidity, GstBuffer * buffer)
+{
+  gint64 new_start, new_stop;
+  gint64 offset, length;
+  GstBuffer *out;
+
+  return buffer;
+
+  if (!gst_segment_clip (timidity->o_segment, GST_FORMAT_DEFAULT,
+          GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET_END (buffer),
+          &new_start, &new_stop)) {
+    gst_buffer_unref (buffer);
+    return NULL;
+  }
+
+  if (GST_BUFFER_OFFSET (buffer) == new_start &&
+      GST_BUFFER_OFFSET_END (buffer) == new_stop)
+    return buffer;
+
+  offset = new_start - GST_BUFFER_OFFSET (buffer);
+  length = new_stop - new_start;
+
+  out = gst_buffer_create_sub (buffer, offset * timidity->bytes_per_frame,
+      length * timidity->bytes_per_frame);
+
+  GST_BUFFER_OFFSET (out) = new_start;
+  GST_BUFFER_OFFSET_END (out) = new_stop;
+  GST_BUFFER_TIMESTAMP (out) = new_start * timidity->time_per_frame;
+  GST_BUFFER_DURATION (out) = (new_stop - new_start) * timidity->time_per_frame;
+
+  gst_buffer_unref (buffer);
+
+  return out;
+}
+
+/* generate audio data and advance internal timers */
+static GstBuffer *
+gst_timidity_fill_buffer (GstTimidity * timidity, GstBuffer * buffer)
+{
+  size_t bytes_read;
+  gint64 samples;
+
+  bytes_read = mid_song_read_wave (timidity->song, GST_BUFFER_DATA (buffer),
+      GST_BUFFER_SIZE (buffer));
+
+  if (bytes_read == 0) {
+    gst_buffer_unref (buffer);
+    return NULL;
+  }
+
+  GST_BUFFER_OFFSET (buffer) =
+      timidity->o_segment->last_stop * timidity->bytes_per_frame;
+  GST_BUFFER_TIMESTAMP (buffer) =
+      timidity->o_segment->last_stop * timidity->time_per_frame;
+
+  if (bytes_read < GST_BUFFER_SIZE (buffer)) {
+    GstBuffer *old = buffer;
+
+    buffer = gst_buffer_create_sub (buffer, 0, bytes_read);
+    gst_buffer_unref (old);
+  }
+
+  samples = GST_BUFFER_SIZE (buffer) / timidity->bytes_per_frame;
+
+  timidity->o_segment->last_stop += samples;
+
+  GST_BUFFER_OFFSET_END (buffer) =
+      timidity->o_segment->last_stop * timidity->bytes_per_frame;
+  GST_BUFFER_DURATION (buffer) = samples * timidity->time_per_frame;
+
+  GST_DEBUG_OBJECT (timidity,
+      "generated buffer %" GST_TIME_FORMAT "-%" GST_TIME_FORMAT
+      " (%d samples)",
+      GST_TIME_ARGS ((guint64) GST_BUFFER_TIMESTAMP (buffer)),
+      GST_TIME_ARGS (((guint64) (GST_BUFFER_TIMESTAMP (buffer) +
+                  GST_BUFFER_DURATION (buffer)))), samples);
+
+  return buffer;
+}
+
+static GstBuffer *
+gst_timidity_get_buffer (GstTimidity * timidity)
+{
+  GstBuffer *out;
+
+  out =
+      gst_timidity_fill_buffer (timidity,
+      gst_timidity_allocate_buffer (timidity, 256));
+
+  if (!out)
+    return NULL;
+
+  return gst_timidity_clip_buffer (timidity, out);
+}
+
+static void
+gst_timidity_loop (GstPad * sinkpad)
+{
+  GstTimidity *timidity = GST_TIMIDITY (GST_PAD_PARENT (sinkpad));
+  GstBuffer *out;
+  GstFlowReturn ret;
+
+  if (timidity->mididata_size == 0) {
+    if (!gst_timidity_get_upstream_size (timidity, &timidity->mididata_size)) {
+      GST_ELEMENT_ERROR (timidity, STREAM, DECODE, (NULL),
+          ("Unable to get song length"));
+      goto paused;
+    }
+
+    if (timidity->mididata)
+      g_free (timidity->mididata);
+
+    timidity->mididata = g_malloc (timidity->mididata_size);
+    timidity->mididata_offset = 0;
+    return;
+  }
+
+  if (timidity->mididata_offset < timidity->mididata_size) {
+    GstBuffer *buffer;
+    gint64 size;
+
+    GST_DEBUG_OBJECT (timidity, "loading song");
+
+    ret =
+        gst_pad_pull_range (timidity->sinkpad, timidity->mididata_offset,
+        -1, &buffer);
+    if (ret != GST_FLOW_OK) {
+      GST_ELEMENT_ERROR (timidity, STREAM, DECODE, (NULL),
+          ("Unable to load song"));
+      goto paused;
+    }
+
+    size = timidity->mididata_size - timidity->mididata_offset;
+    if (GST_BUFFER_SIZE (buffer) < size)
+      size = GST_BUFFER_SIZE (buffer);
+
+    memmove (timidity->mididata + timidity->mididata_offset,
+        GST_BUFFER_DATA (buffer), size);
+    gst_buffer_unref (buffer);
+
+    timidity->mididata_offset += size;
+    GST_DEBUG_OBJECT (timidity, "Song loaded");
+    return;
+  }
+
+  if (!timidity->song) {
+    MidIStream *stream;
+    GstTagList *tags = NULL;
+    gchar *text;
+
+    GST_DEBUG_OBJECT (timidity, "Parsing song");
+
+    stream =
+        mid_istream_open_mem (timidity->mididata, timidity->mididata_size, 0);
+
+    timidity->song = mid_song_load (stream, timidity->song_options);
+    mid_istream_close (stream);
+
+    if (!timidity->song) {
+      GST_ELEMENT_ERROR (timidity, STREAM, DECODE, (NULL),
+          ("Unable to parse midi"));
+      goto paused;
+    }
+
+    mid_song_start (timidity->song);
+    timidity->o_len = (GST_MSECOND *
+        (GstClockTime) mid_song_get_total_time (timidity->song)) /
+        timidity->time_per_frame;
+    gst_segment_set_newsegment (timidity->o_segment, FALSE, 1.0,
+        GST_FORMAT_DEFAULT, 0, GST_CLOCK_TIME_NONE, 0);
+
+
+    gst_pad_push_event (timidity->srcpad,
+        gst_timidity_get_new_segment_event (timidity, GST_FORMAT_TIME, FALSE));
+
+    /* extract tags */
+    text = mid_song_get_meta (timidity->song, MID_SONG_TEXT);
+    if (text) {
+      tags = gst_tag_list_new ();
+      gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_TITLE, text, NULL);
+
+      //g_free (text);
+    }
+
+    text = mid_song_get_meta (timidity->song, MID_SONG_COPYRIGHT);
+    if (text) {
+      if (tags == NULL)
+        tags = gst_tag_list_new ();
+      gst_tag_list_add (tags, GST_TAG_MERGE_APPEND,
+          GST_TAG_COPYRIGHT, text, NULL);
+
+      //g_free (text);
+    }
+
+    if (tags) {
+      gst_element_found_tags (GST_ELEMENT (timidity), tags);
+    }
+
+    GST_DEBUG_OBJECT (timidity, "Parsing song done");
+    return;
+  }
+
+  if (timidity->o_segment_changed) {
+    GST_DEBUG_OBJECT (timidity, "segment changed");
+
+    GstSegment *segment = gst_timidity_get_segment (timidity, GST_FORMAT_TIME,
+        !timidity->o_new_segment);
+
+    GST_LOG_OBJECT (timidity,
+        "sending newsegment from %" GST_TIME_FORMAT "-%" GST_TIME_FORMAT
+        ", pos=%" GST_TIME_FORMAT, GST_TIME_ARGS ((guint64) segment->start),
+        GST_TIME_ARGS ((guint64) segment->stop),
+        GST_TIME_ARGS ((guint64) segment->time));
+
+    if (timidity->o_segment->flags & GST_SEEK_FLAG_SEGMENT) {
+      gst_element_post_message (GST_ELEMENT (timidity),
+          gst_message_new_segment_start (GST_OBJECT (timidity),
+              segment->format, segment->start));
+    }
+
+    gst_segment_free (segment);
+    timidity->o_segment_changed = FALSE;
+    return;
+  }
+
+  if (timidity->o_seek) {
+    /* perform a seek internally */
+    timidity->o_segment->last_stop = timidity->o_segment->time;
+    mid_song_seek (timidity->song,
+        (timidity->o_segment->last_stop * timidity->time_per_frame) /
+        GST_MSECOND);
+  }
+
+  out = gst_timidity_get_buffer (timidity);
+  if (!out) {
+    GST_LOG_OBJECT (timidity, "Song ended, generating eos");
+    gst_pad_push_event (timidity->srcpad, gst_event_new_eos ());
+    timidity->o_seek = FALSE;
+    goto paused;
+  }
+
+  if (timidity->o_seek) {
+    GST_BUFFER_FLAG_SET (out, GST_BUFFER_FLAG_DISCONT);
+    timidity->o_seek = FALSE;
+  }
+
+  gst_buffer_set_caps (out, timidity->out_caps);
+  ret = gst_pad_push (timidity->srcpad, out);
+
+  if (ret == GST_FLOW_OK)
+    return;
+
+  if (GST_FLOW_IS_FATAL (ret)) {
+    GST_ELEMENT_ERROR (timidity, STREAM, FAILED,
+        ("Internal data stream error XXX"),
+        ("Streaming stopped, reason %s", gst_flow_get_name (ret)));
+  }
+
+paused:
+  GST_LOG_OBJECT (timidity, "pausing task");
+  gst_pad_pause_task (timidity->sinkpad);
+}
+
+static GstStateChangeReturn
+gst_timidity_change_state (GstElement * element, GstStateChange transition)
+{
+  GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
+  GstTimidity *timidity = GST_TIMIDITY (element);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_NULL_TO_READY:
+      timidity->out_caps =
+          gst_caps_copy (gst_pad_get_pad_template_caps (timidity->srcpad));
+      timidity->mididata = NULL;
+      break;
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      timidity->mididata_size = 0;
+      break;
+    case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
+      break;
+    default:
+      break;
+  }
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
+      break;
+    case GST_STATE_CHANGE_PAUSED_TO_READY:
+      if (timidity->song)
+        mid_song_free (timidity->song);
+      timidity->song = NULL;
+      timidity->mididata_size = 0;
+      if (timidity->mididata) {
+        g_free (timidity->mididata);
+        timidity->mididata = NULL;
+      }
+      break;
+    case GST_STATE_CHANGE_READY_TO_NULL:
+      gst_caps_unref (timidity->out_caps);
+      break;
+    default:
+      break;
+  }
+
+  return ret;
+}
+
+/*
+ * http://jedi.ks.uiuc.edu/~johns/links/music/midifile.html
+ */
+static void
+gst_timidity_typefind (GstTypeFind * tf, gpointer _data)
+{
+  guint8 *data = gst_type_find_peek (tf, 0, 4);
+
+  if (data && data[0] == 'M' && data[1] == 'T' && data[2] == 'h'
+      && data[3] == 'd') {
+    gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM,
+        gst_caps_new_simple ("audio/midi", NULL));
+  }
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  static gchar *exts[] = { "mid", "midi", NULL };
+  /* exchange the strings 'plugin' and 'Template plugin' with your
+   * plugin name and description */
+  GST_DEBUG_CATEGORY_INIT (gst_timidity_debug, "timidity",
+      0, "Timidity plugin");
+
+  /* initialise timidity library, fail loading the plugin if this fails
+   * FIXME: check for config location during configure
+   */
+  if (mid_init ("/etc/timidity/timidity.cfg") != 0) {
+    GST_WARNING ("can't initialize timidity, is it configured?");
+    return FALSE;
+  }
+
+  if (!gst_type_find_register (plugin, "audio/midi", GST_RANK_PRIMARY,
+          gst_timidity_typefind, exts,
+          gst_caps_new_simple ("audio/midi", NULL), NULL, NULL))
+    return FALSE;
+
+  return gst_element_register (plugin, "timidity",
+      GST_RANK_PRIMARY, GST_TYPE_TIMIDITY);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "timidity",
+    "Timidity Plugin",
+    plugin_init, VERSION, "LGPL", "GStreamer", "http://gstreamer.net/")
diff --git a/ext/timidity/gsttimidity.h b/ext/timidity/gsttimidity.h
new file mode 100644
index 00000000..0e58b3b6
--- /dev/null
+++ b/ext/timidity/gsttimidity.h
@@ -0,0 +1,82 @@
+/*
+ * gsttimdity - timidity plugin for gstreamer
+ * 
+ * Copyright 2007 Wouter Paesen <wouter@blue-gate.be>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Wrapper element for libtimidity.  This element works in pull
+ * based mode because that's essentially how libtimidity works. 
+ * We create a libtimidity stream that operates on the srcpad.  
+ * The sinkpad is in pull mode.
+ */
+
+#ifndef __GST_TIMIDITY_H__
+#define __GST_TIMIDITY_H__
+
+#include <gst/gst.h>
+#include <gst/base/gstadapter.h>
+#include <timidity.h>
+
+G_BEGIN_DECLS
+#define GST_TYPE_TIMIDITY \
+  (gst_timidity_get_type())
+#define GST_TIMIDITY(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_TIMIDITY,GstTimidity))
+#define GST_TIMIDITY_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_TIMIDITY,GstTimidityClass))
+#define GST_IS_TIMIDITY(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_TIMIDITY))
+#define GST_IS_TIMIDITY_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_TIMIDITY))
+typedef struct _GstTimidity GstTimidity;
+typedef struct _GstTimidityClass GstTimidityClass;
+
+struct _GstTimidity
+{
+    GstElement element;
+
+    GstPad *sinkpad, *srcpad;
+
+    /* input stream properties */
+    gint64 mididata_size, mididata_offset;
+    gchar *mididata;
+    gboolean mididata_filled;
+
+    MidSong *song;
+
+    /* output data */
+    gboolean o_new_segment, o_segment_changed, o_seek;
+    GstSegment o_segment[1];
+    gint64 o_len;
+
+    /* format of the stream */
+    MidSongOptions song_options[1];
+    gint64 bytes_per_frame;
+    GstClockTime time_per_frame;
+
+    GstCaps *out_caps;
+};
+
+struct _GstTimidityClass
+{
+    GstElementClass parent_class;
+};
+
+GType gst_timidity_get_type (void);
+
+G_END_DECLS
+#endif /* __GST_TIMIDITY_H__ */