--- /dev/null
+/*
+ * 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/")
projects / platform / upstream / gstreamer.git / commitdiff