| /* |
| * 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., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| /** |
| * SECTION:element-timidity |
| * @see_also: wildmidi |
| * |
| * This element renders midi-files as audio streams using |
| * <ulink url="http://timidity.sourceforge.net/">Timidity</ulink>. |
| * |
| * <refsect2> |
| * <title>Example pipeline</title> |
| * |[ |
| * gst-launch filesrc location=song.mid ! timidity ! alsasink |
| * ]| This example pipeline will parse the midi and render to raw audio which is |
| * played via alsa. |
| * </refsect2> |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include <gst/gst.h> |
| #include <string.h> |
| |
| #include "gsttimidity.h" |
| |
| #ifndef TIMIDITY_CFG |
| #define TIMIDITY_CFG "/etc/timidity.cfg" |
| #endif |
| |
| GST_DEBUG_CATEGORY_STATIC (gst_timidity_debug); |
| #define GST_CAT_DEFAULT gst_timidity_debug |
| |
| enum |
| { |
| /* FILL ME */ |
| LAST_SIGNAL |
| }; |
| |
| enum |
| { |
| ARG_0, |
| /* FILL ME */ |
| }; |
| |
| 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; audio/riff-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_static_pad_template (element_class, &src_factory); |
| gst_element_class_add_static_pad_template (element_class, &sink_factory); |
| gst_element_class_set_static_metadata (element_class, "Timidity", |
| "Codec/Decoder/Audio", |
| "Midi Synthesizer Element", "Wouter Paesen <wouter@blue-gate.be>"); |
| } |
| |
| /* initialize the plugin's class */ |
| static void |
| gst_timidity_class_init (GstTimidityClass * klass) |
| { |
| GstElementClass *gstelement_class; |
| |
| 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); |
| |
| /* initialise timidity library */ |
| if (mid_init ((char *) TIMIDITY_CFG) == 0) { |
| filter->initialized = TRUE; |
| } else { |
| GST_WARNING ("can't initialize timidity with config: " TIMIDITY_CFG); |
| } |
| |
| 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:{ |
| GstFormat format; |
| gint64 start, stop; |
| |
| format = timidity->o_segment->format; |
| |
| start = |
| gst_segment_to_stream_time (timidity->o_segment, format, |
| timidity->o_segment->start); |
| if ((stop = timidity->o_segment->stop) == -1) |
| stop = timidity->o_segment->duration; |
| else |
| stop = gst_segment_to_stream_time (timidity->o_segment, format, stop); |
| |
| gst_query_set_segment (query, timidity->o_segment->rate, format, start, |
| stop); |
| res = TRUE; |
| 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 = 0, stop = 0, time = 0; |
| |
| 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 = 0, stop = 0; |
| 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_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, NULL); |
| |
| 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, |
| NULL); |
| } 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 |
| " (%" G_GINT64_FORMAT " 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; |
| } |
| |
| 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 = NULL; |
| 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) { |
| 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_UNEXPECTED) |
| goto eos; |
| else if (ret < GST_FLOW_UNEXPECTED || ret == GST_FLOW_NOT_LINKED) |
| goto error; |
| |
| return; |
| |
| paused: |
| { |
| GST_DEBUG_OBJECT (timidity, "pausing task"); |
| gst_pad_pause_task (timidity->sinkpad); |
| return; |
| } |
| eos: |
| { |
| gst_pad_push_event (timidity->srcpad, gst_event_new_eos ()); |
| goto paused; |
| } |
| error: |
| { |
| GST_ELEMENT_FLOW_ERROR (timidity, ret); |
| gst_pad_push_event (timidity->srcpad, gst_event_new_eos ()); |
| goto paused; |
| } |
| } |
| |
| static GstStateChangeReturn |
| gst_timidity_change_state (GstElement * element, GstStateChange transition) |
| { |
| GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; |
| GstTimidity *timidity = GST_TIMIDITY (element); |
| |
| if (!timidity->initialized) { |
| GST_WARNING ("Timidity renderer is not initialized"); |
| return GST_STATE_CHANGE_FAILURE; |
| } |
| |
| 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; |
| } |
| |
| static gboolean |
| plugin_init (GstPlugin * plugin) |
| { |
| GST_DEBUG_CATEGORY_INIT (gst_timidity_debug, "timidity", |
| 0, "Timidity plugin"); |
| |
| 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, "GPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN) |