/* * gstwildmidi - wildmidi plugin for gstreamer * * Copyright 2007 Wouter Paesen * * 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-wildmidi * @title: wildmidi * @see_also: timidity * * This element renders midi-files as audio streams using * Wildmidi. * It offers better sound quality compared to the timidity element. Wildmidi * uses the same sound-patches as timidity (it tries the path in $WILDMIDI_CFG, * $HOME/.wildmidirc and /etc/wildmidi.cfg) * * ## Example pipeline * |[ * gst-launch-1.0 filesrc location=song.mid ! wildmidi ! alsasink * ]| This example pipeline will parse the midi and render to raw audio which is * played via alsa. * */ #ifdef HAVE_CONFIG_H # include #endif #define WILDMIDI_RATE 44100 #define WILDMIDI_BPS (2 * 2) #include #include #include #include #include #include #include "gstwildmidi.h" #ifndef WILDMIDI_CFG #define WILDMIDI_CFG "/etc/timidity.cfg" #endif GST_DEBUG_CATEGORY_STATIC (gst_wildmidi_debug); #define GST_CAT_DEFAULT gst_wildmidi_debug enum { /* FILL ME */ LAST_SIGNAL }; enum { PROP_0, PROP_LINEAR_VOLUME, PROP_HIGH_QUALITY, /* FILL ME */ }; #define DEFAULT_LINEAR_VOLUME TRUE #define DEFAULT_HIGH_QUALITY TRUE static void gst_wildmidi_finalize (GObject * object); static gboolean gst_wildmidi_sink_event (GstPad * pad, GstObject * parent, GstEvent * event); static gboolean gst_wildmidi_src_event (GstPad * pad, GstObject * parent, GstEvent * event); static GstStateChangeReturn gst_wildmidi_change_state (GstElement * element, GstStateChange transition); static gboolean gst_wildmidi_activate (GstPad * pad, GstObject * parent); static gboolean gst_wildmidi_activatemode (GstPad * pad, GstObject * parent, GstPadMode mode, gboolean active); static void gst_wildmidi_loop (GstPad * sinkpad); static GstFlowReturn gst_wildmidi_chain (GstPad * sinkpad, GstObject * parent, GstBuffer * buffer); static gboolean gst_wildmidi_src_query (GstPad * pad, GstObject * parent, GstQuery * query); static void gst_wildmidi_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_wildmidi_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); 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, " "format = (string) S16LE, " "rate = (int) 44100, " "channels = (int) 2, " "layout = (string) interleaved")); #define parent_class gst_wildmidi_parent_class G_DEFINE_TYPE (GstWildmidi, gst_wildmidi, GST_TYPE_ELEMENT); static gboolean wildmidi_open_config (void) { gchar *path = g_strdup (g_getenv ("WILDMIDI_CFG")); gint ret; GST_DEBUG ("trying %s", GST_STR_NULL (path)); if (path && (g_access (path, R_OK) == -1)) { g_free (path); path = NULL; } if (path == NULL) { path = g_build_path (G_DIR_SEPARATOR_S, g_get_home_dir (), ".wildmidirc", NULL); GST_DEBUG ("trying %s", path); if (path && (g_access (path, R_OK) == -1)) { g_free (path); path = NULL; } } if (path == NULL) { path = g_build_path (G_DIR_SEPARATOR_S, G_DIR_SEPARATOR_S "etc", "wildmidi.cfg", NULL); GST_DEBUG ("trying %s", path); if (path && (g_access (path, R_OK) == -1)) { g_free (path); path = NULL; } } if (path == NULL) { path = g_build_path (G_DIR_SEPARATOR_S, G_DIR_SEPARATOR_S "etc", "wildmidi", "wildmidi.cfg", NULL); GST_DEBUG ("trying %s", path); if (path && (g_access (path, R_OK) == -1)) { g_free (path); path = NULL; } } if (path == NULL) { path = g_strdup (WILDMIDI_CFG); GST_DEBUG ("trying %s", path); if (path && (g_access (path, R_OK) == -1)) { g_free (path); path = NULL; } } if (path == NULL) { path = g_build_path (G_DIR_SEPARATOR_S, G_DIR_SEPARATOR_S "etc", "timidity.cfg", NULL); GST_DEBUG ("trying %s", path); if (path && (g_access (path, R_OK) == -1)) { g_free (path); path = NULL; } } if (path == NULL) { path = g_build_path (G_DIR_SEPARATOR_S, G_DIR_SEPARATOR_S "etc", "timidity", "timidity.cfg", NULL); GST_DEBUG ("trying %s", path); if (path && (g_access (path, R_OK) == -1)) { g_free (path); path = NULL; } } if (path == NULL) { /* I've created a symlink to get it playing * ln -s /usr/share/timidity/timidity.cfg /etc/wildmidi.cfg * we could make it use : WILDMIDI_CFG * but unfortunately it fails to create a proper filename if the config * has a redirect * http://sourceforge.net/tracker/index.php?func=detail&aid=1657358&group_id=42635&atid=433744 */ GST_WARNING ("no config file, can't initialise"); return FALSE; } /* this also initializes a some filter and stuff and thus is slow */ ret = WildMidi_Init (path, WILDMIDI_RATE, 0); g_free (path); return (ret == 0); } /* initialize the plugin's class */ static void gst_wildmidi_class_init (GstWildmidiClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gobject_class->finalize = gst_wildmidi_finalize; gobject_class->set_property = gst_wildmidi_set_property; gobject_class->get_property = gst_wildmidi_get_property; g_object_class_install_property (gobject_class, PROP_LINEAR_VOLUME, g_param_spec_boolean ("linear-volume", "Linear volume", "Linear volume", DEFAULT_LINEAR_VOLUME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_HIGH_QUALITY, g_param_spec_boolean ("high-quality", "High Quality", "High Quality", DEFAULT_HIGH_QUALITY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_element_class_add_static_pad_template (gstelement_class, &src_factory); gst_element_class_add_static_pad_template (gstelement_class, &sink_factory); gst_element_class_set_static_metadata (gstelement_class, "WildMidi", "Codec/Decoder/Audio", "Midi Synthesizer Element", "Wouter Paesen "); gstelement_class->change_state = gst_wildmidi_change_state; } /* initialize the new element * instantiate pads and add them to element * set functions * initialize structure */ static void gst_wildmidi_init (GstWildmidi * filter) { filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink"); gst_pad_set_activatemode_function (filter->sinkpad, gst_wildmidi_activatemode); gst_pad_set_activate_function (filter->sinkpad, gst_wildmidi_activate); gst_pad_set_event_function (filter->sinkpad, gst_wildmidi_sink_event); gst_pad_set_chain_function (filter->sinkpad, gst_wildmidi_chain); gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad); filter->srcpad = gst_pad_new_from_static_template (&src_factory, "src"); gst_pad_set_query_function (filter->srcpad, gst_wildmidi_src_query); gst_pad_set_event_function (filter->srcpad, gst_wildmidi_src_event); gst_pad_use_fixed_caps (filter->srcpad); gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad); gst_segment_init (filter->o_segment, GST_FORMAT_DEFAULT); filter->adapter = gst_adapter_new (); filter->bytes_per_frame = WILDMIDI_BPS; filter->high_quality = DEFAULT_HIGH_QUALITY; filter->linear_volume = DEFAULT_LINEAR_VOLUME; } static void gst_wildmidi_finalize (GObject * object) { GstWildmidi *wildmidi; wildmidi = GST_WILDMIDI (object); g_object_unref (wildmidi->adapter); G_OBJECT_CLASS (parent_class)->finalize (object); } static gboolean gst_wildmidi_src_convert (GstWildmidi * wildmidi, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value) { gboolean res = TRUE; gint64 frames; if (src_format == *dest_format || src_value == -1) { *dest_value = src_value; goto done; } switch (src_format) { case GST_FORMAT_TIME: frames = gst_util_uint64_scale_int (src_value, WILDMIDI_RATE, GST_SECOND); break; case GST_FORMAT_BYTES: frames = src_value / (wildmidi->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 = gst_util_uint64_scale_int (frames, GST_SECOND, WILDMIDI_RATE); break; case GST_FORMAT_BYTES: *dest_value = frames * wildmidi->bytes_per_frame; break; case GST_FORMAT_DEFAULT: *dest_value = frames; break; default: res = FALSE; break; } done: return res; } static gboolean gst_wildmidi_src_query (GstPad * pad, GstObject * parent, GstQuery * query) { gboolean res = TRUE; GstWildmidi *wildmidi = GST_WILDMIDI (parent); GstFormat src_format, dst_format; gint64 src_value, dst_value; if (!wildmidi->song) return FALSE; switch (GST_QUERY_TYPE (query)) { case GST_QUERY_DURATION: gst_query_set_duration (query, GST_FORMAT_TIME, gst_util_uint64_scale_int (wildmidi->o_len, GST_SECOND, WILDMIDI_RATE)); break; case GST_QUERY_POSITION: gst_query_set_position (query, GST_FORMAT_TIME, gst_util_uint64_scale_int (wildmidi->o_segment->position, GST_SECOND, WILDMIDI_RATE)); break; case GST_QUERY_CONVERT: gst_query_parse_convert (query, &src_format, &src_value, &dst_format, NULL); res = gst_wildmidi_src_convert (wildmidi, 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 = wildmidi->o_segment->format; start = gst_segment_to_stream_time (wildmidi->o_segment, format, wildmidi->o_segment->start); if ((stop = wildmidi->o_segment->stop) == -1) stop = wildmidi->o_segment->duration; else stop = gst_segment_to_stream_time (wildmidi->o_segment, format, stop); gst_query_set_segment (query, wildmidi->o_segment->rate, format, start, stop); res = TRUE; break; } case GST_QUERY_SEEKING: gst_query_set_seeking (query, wildmidi->o_segment->format, TRUE, 0, wildmidi->o_len); break; default: res = gst_pad_query_default (pad, parent, query); break; } return res; } static GstEvent * gst_wildmidi_get_new_segment_event (GstWildmidi * wildmidi, GstFormat format) { gint64 start = 0, stop = -1, time = 0; GstSegment *segment, newseg; GstEvent *event; GstFormat src_format; segment = wildmidi->o_segment; src_format = segment->format; newseg = *segment; /* convert the segment values to the target format */ gst_wildmidi_src_convert (wildmidi, src_format, segment->start, &format, &start); gst_wildmidi_src_convert (wildmidi, src_format, segment->stop, &format, &stop); gst_wildmidi_src_convert (wildmidi, src_format, segment->time, &format, &time); newseg.format = format; newseg.start = start; newseg.stop = stop; newseg.time = time; event = gst_event_new_segment (&newseg); return event; } static gboolean gst_wildmidi_do_seek (GstWildmidi * wildmidi, GstEvent * event) { gdouble rate; GstFormat src_format, dst_format; GstSeekFlags flags; GstSeekType start_type, stop_type; gint64 start, stop; gboolean flush, update; #ifdef HAVE_WILDMIDI_0_2_2 gboolean accurate; #endif gboolean res; unsigned long int sample; GstSegment *segment; if (!wildmidi->song) return FALSE; gst_event_parse_seek (event, &rate, &src_format, &flags, &start_type, &start, &stop_type, &stop); /* convert the input format to samples */ dst_format = GST_FORMAT_DEFAULT; res = TRUE; if (start_type != GST_SEEK_TYPE_NONE) { res = gst_wildmidi_src_convert (wildmidi, src_format, start, &dst_format, &start); } if (res && stop_type != GST_SEEK_TYPE_NONE) { res = gst_wildmidi_src_convert (wildmidi, src_format, stop, &dst_format, &stop); } /* unsupported format */ if (!res) return res; flush = ((flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH); #ifdef HAVE_WILDMIDI_0_2_2 accurate = ((flags & GST_SEEK_FLAG_ACCURATE) == GST_SEEK_FLAG_ACCURATE); #endif if (flush) { GST_DEBUG ("performing flush"); gst_pad_push_event (wildmidi->srcpad, gst_event_new_flush_start ()); } else { gst_pad_stop_task (wildmidi->sinkpad); } segment = wildmidi->o_segment; GST_PAD_STREAM_LOCK (wildmidi->sinkpad); if (flush) { gst_pad_push_event (wildmidi->srcpad, gst_event_new_flush_stop (TRUE)); } /* update the segment now */ gst_segment_do_seek (segment, rate, dst_format, flags, start_type, start, stop_type, stop, &update); /* we need to seek to position in the segment now, sample will be updated */ sample = segment->position; GST_OBJECT_LOCK (wildmidi); #ifdef HAVE_WILDMIDI_0_2_2 if (accurate) { WildMidi_SampledSeek (wildmidi->song, &sample); } else { WildMidi_FastSeek (wildmidi->song, &sample); } #else WildMidi_FastSeek (wildmidi->song, &sample); #endif GST_OBJECT_UNLOCK (wildmidi); segment->start = segment->time = segment->position = sample; gst_pad_push_event (wildmidi->srcpad, gst_wildmidi_get_new_segment_event (wildmidi, GST_FORMAT_TIME)); gst_pad_start_task (wildmidi->sinkpad, (GstTaskFunction) gst_wildmidi_loop, wildmidi->sinkpad, NULL); wildmidi->discont = TRUE; GST_PAD_STREAM_UNLOCK (wildmidi->sinkpad); GST_DEBUG ("seek done"); return TRUE; } static gboolean gst_wildmidi_src_event (GstPad * pad, GstObject * parent, GstEvent * event) { gboolean res = FALSE; GstWildmidi *wildmidi = GST_WILDMIDI (parent); GST_DEBUG_OBJECT (pad, "%s event received", GST_EVENT_TYPE_NAME (event)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEEK: res = gst_wildmidi_do_seek (wildmidi, event); break; default: break; } gst_event_unref (event); return res; } static gboolean gst_wildmidi_activate (GstPad * sinkpad, GstObject * parent) { GstQuery *query; gboolean pull_mode; query = gst_query_new_scheduling (); if (!gst_pad_peer_query (sinkpad, query)) { gst_query_unref (query); goto activate_push; } pull_mode = gst_query_has_scheduling_mode_with_flags (query, GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE); gst_query_unref (query); if (!pull_mode) goto activate_push; GST_DEBUG_OBJECT (sinkpad, "activating pull"); return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE); activate_push: { GST_DEBUG_OBJECT (sinkpad, "activating push"); return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE); } } static gboolean gst_wildmidi_activatemode (GstPad * pad, GstObject * parent, GstPadMode mode, gboolean active) { gboolean res; switch (mode) { case GST_PAD_MODE_PUSH: res = TRUE; break; case GST_PAD_MODE_PULL: if (active) { res = gst_pad_start_task (pad, (GstTaskFunction) gst_wildmidi_loop, pad, NULL); } else { res = gst_pad_stop_task (pad); } break; default: res = FALSE; break; } return res; } static GstBuffer * gst_wildmidi_clip_buffer (GstWildmidi * wildmidi, GstBuffer * buffer) { guint64 start, stop; guint64 new_start, new_stop; gint64 offset, length; guint64 bpf; /* clipping disabled for now */ return buffer; start = GST_BUFFER_OFFSET (buffer); stop = GST_BUFFER_OFFSET_END (buffer); if (!gst_segment_clip (wildmidi->o_segment, GST_FORMAT_DEFAULT, start, stop, &new_start, &new_stop)) { gst_buffer_unref (buffer); return NULL; } if (start == new_start && stop == new_stop) return buffer; offset = new_start - start; length = new_stop - new_start; bpf = wildmidi->bytes_per_frame; buffer = gst_buffer_make_writable (buffer); gst_buffer_resize (buffer, offset * bpf, length * bpf); GST_BUFFER_OFFSET (buffer) = new_start; GST_BUFFER_OFFSET_END (buffer) = new_stop; GST_BUFFER_TIMESTAMP (buffer) = gst_util_uint64_scale_int (new_start, GST_SECOND, WILDMIDI_RATE); GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale_int (new_stop, GST_SECOND, WILDMIDI_RATE) - GST_BUFFER_TIMESTAMP (buffer); return buffer; } /* generate audio data and advance internal timers */ static GstBuffer * gst_wildmidi_get_buffer (GstWildmidi * wildmidi) { size_t size; gint64 samples; GstBuffer *buffer; GstSegment *segment; GstMapInfo info; guint bpf; bpf = wildmidi->bytes_per_frame; buffer = gst_buffer_new_and_alloc (256 * bpf); gst_buffer_map (buffer, &info, GST_MAP_READWRITE); GST_OBJECT_LOCK (wildmidi); size = WildMidi_GetOutput (wildmidi->song, (gpointer) info.data, (unsigned long int) info.size); GST_OBJECT_UNLOCK (wildmidi); gst_buffer_unmap (buffer, &info); if (size == 0) { gst_buffer_unref (buffer); return NULL; } /* adjust buffer size */ gst_buffer_resize (buffer, 0, size); segment = wildmidi->o_segment; GST_BUFFER_OFFSET (buffer) = segment->position; GST_BUFFER_TIMESTAMP (buffer) = gst_util_uint64_scale_int (segment->position, GST_SECOND, WILDMIDI_RATE); samples = size / bpf; segment->position += samples; GST_BUFFER_OFFSET_END (buffer) = segment->position; GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale_int (segment->position, GST_SECOND, WILDMIDI_RATE) - GST_BUFFER_TIMESTAMP (buffer); GST_DEBUG_OBJECT (wildmidi, "buffer ts: %" GST_TIME_FORMAT ", " "duration: %" GST_TIME_FORMAT " (%" G_GINT64_FORMAT " samples)", GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)), GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)), samples); return gst_wildmidi_clip_buffer (wildmidi, buffer); } static GstFlowReturn gst_wildmidi_parse_song (GstWildmidi * wildmidi) { struct _WM_Info *info; GstCaps *outcaps; guint8 *data; guint size; GST_DEBUG_OBJECT (wildmidi, "Parsing song"); size = gst_adapter_available (wildmidi->adapter); data = gst_adapter_take (wildmidi->adapter, size); /* this method takes our memory block */ GST_OBJECT_LOCK (wildmidi); wildmidi->song = WildMidi_OpenBuffer (data, size); if (!wildmidi->song) goto open_failed; #ifdef HAVE_WILDMIDI_0_2_2 WildMidi_LoadSamples (wildmidi->song); #endif #ifdef HAVE_WILDMIDI_0_2_2 WildMidi_SetOption (wildmidi->song, WM_MO_LINEAR_VOLUME, wildmidi->linear_volume); WildMidi_SetOption (wildmidi->song, WM_MO_EXPENSIVE_INTERPOLATION, wildmidi->high_quality); #else WildMidi_SetOption (wildmidi->song, WM_MO_LOG_VOLUME, !wildmidi->linear_volume); WildMidi_SetOption (wildmidi->song, WM_MO_ENHANCED_RESAMPLING, wildmidi->high_quality); #endif info = WildMidi_GetInfo (wildmidi->song); GST_OBJECT_UNLOCK (wildmidi); wildmidi->o_len = info->approx_total_samples; outcaps = gst_caps_copy (gst_pad_get_pad_template_caps (wildmidi->srcpad)); gst_pad_set_caps (wildmidi->srcpad, outcaps); gst_caps_unref (outcaps); /* we keep an internal segment in samples */ gst_segment_init (wildmidi->o_segment, GST_FORMAT_DEFAULT); gst_pad_push_event (wildmidi->srcpad, gst_wildmidi_get_new_segment_event (wildmidi, GST_FORMAT_TIME)); GST_DEBUG_OBJECT (wildmidi, "Parsing song done"); return GST_FLOW_OK; /* ERRORS */ open_failed: { GST_OBJECT_UNLOCK (wildmidi); GST_ELEMENT_ERROR (wildmidi, STREAM, DECODE, (NULL), ("Unable to parse midi data")); return GST_FLOW_ERROR; } } static GstFlowReturn gst_wildmidi_do_play (GstWildmidi * wildmidi) { GstBuffer *out; GstFlowReturn ret; if (!(out = gst_wildmidi_get_buffer (wildmidi))) goto eos; if (wildmidi->discont) { GST_BUFFER_FLAG_SET (out, GST_BUFFER_FLAG_DISCONT); wildmidi->discont = FALSE; } ret = gst_pad_push (wildmidi->srcpad, out); return ret; /* ERRORS */ eos: { GST_LOG_OBJECT (wildmidi, "Song ended"); return GST_FLOW_EOS; } } static gboolean gst_wildmidi_sink_event (GstPad * pad, GstObject * parent, GstEvent * event) { gboolean res; GstWildmidi *wildmidi = GST_WILDMIDI (parent); GST_DEBUG_OBJECT (pad, "%s event received", GST_EVENT_TYPE_NAME (event)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_EOS: wildmidi->state = GST_WILDMIDI_STATE_PARSE; /* now start the parsing task */ res = gst_pad_start_task (wildmidi->sinkpad, (GstTaskFunction) gst_wildmidi_loop, wildmidi->sinkpad, NULL); /* don't forward the event */ gst_event_unref (event); break; default: res = gst_pad_event_default (pad, parent, event); break; } return res; } static GstFlowReturn gst_wildmidi_chain (GstPad * sinkpad, GstObject * parent, GstBuffer * buffer) { GstWildmidi *wildmidi; wildmidi = GST_WILDMIDI (parent); /* push stuff in the adapter, we will start doing something in the sink event * handler when we get EOS */ gst_adapter_push (wildmidi->adapter, buffer); return GST_FLOW_OK; } static void gst_wildmidi_loop (GstPad * sinkpad) { GstWildmidi *wildmidi = GST_WILDMIDI (GST_PAD_PARENT (sinkpad)); GstFlowReturn ret; switch (wildmidi->state) { case GST_WILDMIDI_STATE_LOAD: { GstBuffer *buffer = NULL; GST_DEBUG_OBJECT (wildmidi, "loading song"); ret = gst_pad_pull_range (wildmidi->sinkpad, wildmidi->offset, -1, &buffer); if (ret == GST_FLOW_EOS) { GST_DEBUG_OBJECT (wildmidi, "Song loaded"); wildmidi->state = GST_WILDMIDI_STATE_PARSE; } else if (ret != GST_FLOW_OK) { GST_ELEMENT_ERROR (wildmidi, STREAM, DECODE, (NULL), ("Unable to read song")); goto pause; } else { GST_DEBUG_OBJECT (wildmidi, "pushing buffer"); gst_adapter_push (wildmidi->adapter, buffer); wildmidi->offset += gst_buffer_get_size (buffer); } break; } case GST_WILDMIDI_STATE_PARSE: ret = gst_wildmidi_parse_song (wildmidi); if (ret != GST_FLOW_OK) goto pause; wildmidi->state = GST_WILDMIDI_STATE_PLAY; break; case GST_WILDMIDI_STATE_PLAY: ret = gst_wildmidi_do_play (wildmidi); if (ret != GST_FLOW_OK) goto pause; break; default: break; } return; pause: { const gchar *reason = gst_flow_get_name (ret); GstEvent *event; GST_DEBUG_OBJECT (wildmidi, "pausing task, reason %s", reason); gst_pad_pause_task (sinkpad); if (ret == GST_FLOW_EOS) { /* perform EOS logic */ event = gst_event_new_eos (); gst_pad_push_event (wildmidi->srcpad, event); } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) { event = gst_event_new_eos (); /* for fatal errors we post an error message, post the error * first so the app knows about the error first. */ GST_ELEMENT_FLOW_ERROR (wildmidi, ret); gst_pad_push_event (wildmidi->srcpad, event); } } } static GstStateChangeReturn gst_wildmidi_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; GstWildmidi *wildmidi = GST_WILDMIDI (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: wildmidi->offset = 0; wildmidi->state = GST_WILDMIDI_STATE_LOAD; wildmidi->discont = FALSE; 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: GST_OBJECT_LOCK (wildmidi); if (wildmidi->song) WildMidi_Close (wildmidi->song); wildmidi->song = NULL; GST_OBJECT_UNLOCK (wildmidi); gst_adapter_clear (wildmidi->adapter); break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; } static void gst_wildmidi_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstWildmidi *wildmidi; g_return_if_fail (GST_IS_WILDMIDI (object)); wildmidi = GST_WILDMIDI (object); switch (prop_id) { case PROP_LINEAR_VOLUME: GST_OBJECT_LOCK (object); wildmidi->linear_volume = g_value_get_boolean (value); if (wildmidi->song) #ifdef HAVE_WILDMIDI_0_2_2 WildMidi_SetOption (wildmidi->song, WM_MO_LINEAR_VOLUME, wildmidi->linear_volume); #else WildMidi_SetOption (wildmidi->song, WM_MO_LOG_VOLUME, !wildmidi->linear_volume); #endif GST_OBJECT_UNLOCK (object); break; case PROP_HIGH_QUALITY: GST_OBJECT_LOCK (object); wildmidi->high_quality = g_value_get_boolean (value); if (wildmidi->song) #ifdef HAVE_WILDMIDI_0_2_2 WildMidi_SetOption (wildmidi->song, WM_MO_EXPENSIVE_INTERPOLATION, wildmidi->high_quality); #else WildMidi_SetOption (wildmidi->song, WM_MO_ENHANCED_RESAMPLING, wildmidi->high_quality); #endif GST_OBJECT_UNLOCK (object); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_wildmidi_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstWildmidi *wildmidi; g_return_if_fail (GST_IS_WILDMIDI (object)); wildmidi = GST_WILDMIDI (object); switch (prop_id) { case PROP_LINEAR_VOLUME: GST_OBJECT_LOCK (object); g_value_set_boolean (value, wildmidi->linear_volume); GST_OBJECT_UNLOCK (object); break; case PROP_HIGH_QUALITY: GST_OBJECT_LOCK (object); g_value_set_boolean (value, wildmidi->high_quality); GST_OBJECT_UNLOCK (object); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (gst_wildmidi_debug, "wildmidi", 0, "Wildmidi plugin"); if (!wildmidi_open_config ()) { GST_WARNING ("Can't initialize wildmidi"); return FALSE; } return gst_element_register (plugin, "wildmidi", GST_RANK_SECONDARY, GST_TYPE_WILDMIDI); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, wildmidi, "Wildmidi Plugin", plugin_init, VERSION, "GPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)