| /* |
| * gstwildmidi - wildmidi 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. |
| */ |
| |
| /** |
| * SECTION:element-wildmidi |
| * @see_also: timidity |
| * |
| * This element renders midi-files as audio streams using |
| * <ulink url="http://wildmidi.sourceforge.net//">Wildmidi</ulink>. |
| * 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) |
| * |
| * <refsect2> |
| * <title>Example pipeline</title> |
| * |[ |
| * gst-launch filesrc location=song.mid ! wildmidi ! 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 |
| |
| #define WILDMIDI_RATE 44100 |
| #define WILDMIDI_BPS (2 * 2) |
| |
| #include <gst/gst.h> |
| #include <string.h> |
| #include <glib.h> |
| #include <glib/gstdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| #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 |
| |
| static const GstElementDetails gst_wildmidi_details = |
| GST_ELEMENT_DETAILS ("WildMidi", |
| "Codec/Decoder/Audio", |
| "Midi Synthesizer Element", |
| "Wouter Paesen <wouter@blue-gate.be>"); |
| |
| enum |
| { |
| /* FILL ME */ |
| LAST_SIGNAL |
| }; |
| |
| enum |
| { |
| ARG_0, |
| ARG_LINEAR_VOLUME, |
| ARG_HIGH_QUALITY, |
| /* FILL ME */ |
| }; |
| |
| static void gst_wildmidi_base_init (gpointer g_class); |
| |
| static void gst_wildmidi_class_init (GstWildmidiClass * klass); |
| |
| static gboolean gst_wildmidi_src_event (GstPad * pad, GstEvent * event); |
| |
| static GstStateChangeReturn gst_wildmidi_change_state (GstElement * element, |
| GstStateChange transition); |
| static gboolean gst_wildmidi_activate (GstPad * pad); |
| |
| static gboolean gst_wildmidi_activatepull (GstPad * pad, gboolean active); |
| |
| static void gst_wildmidi_loop (GstPad * sinkpad); |
| |
| static gboolean gst_wildmidi_src_query (GstPad * pad, 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") |
| ); |
| |
| 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 (GstWildmidi, gst_wildmidi, GstElement, GST_TYPE_ELEMENT); |
| |
| static void |
| gst_wildmidi_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_wildmidi_details); |
| } |
| |
| static gboolean |
| wildmidi_open_config () |
| { |
| 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, "/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, "/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, "/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, "/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; |
| |
| gstelement_class->change_state = gst_wildmidi_change_state; |
| gobject_class->set_property = gst_wildmidi_set_property; |
| gobject_class->get_property = gst_wildmidi_get_property; |
| |
| g_object_class_install_property (gobject_class, ARG_LINEAR_VOLUME, |
| g_param_spec_boolean ("linear-volume", "Linear volume", |
| "Linear volume", TRUE, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
| |
| g_object_class_install_property (gobject_class, ARG_HIGH_QUALITY, |
| g_param_spec_boolean ("high-quality", "High Quality", |
| "High Quality", TRUE, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); |
| } |
| |
| /* initialize the new element |
| * instantiate pads and add them to element |
| * set functions |
| * initialize structure |
| */ |
| static void |
| gst_wildmidi_init (GstWildmidi * filter, GstWildmidiClass * 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_wildmidi_activatepull); |
| gst_pad_set_activate_function (filter->sinkpad, gst_wildmidi_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_wildmidi_src_query); |
| gst_pad_set_event_function (filter->srcpad, gst_wildmidi_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); |
| |
| gst_segment_init (filter->o_segment, GST_FORMAT_DEFAULT); |
| |
| filter->bytes_per_frame = WILDMIDI_BPS; |
| filter->time_per_frame = GST_SECOND / WILDMIDI_RATE; |
| } |
| |
| 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) { |
| *dest_value = src_value; |
| goto done; |
| } |
| |
| switch (src_format) { |
| case GST_FORMAT_TIME: |
| frames = src_value / wildmidi->time_per_frame; |
| 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 = frames * wildmidi->time_per_frame; |
| 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, GstQuery * query) |
| { |
| gboolean res = TRUE; |
| |
| GstWildmidi *wildmidi = GST_WILDMIDI (gst_pad_get_parent (pad)); |
| |
| GstFormat src_format, dst_format; |
| |
| gint64 src_value, dst_value; |
| |
| if (!wildmidi->song) { |
| gst_object_unref (wildmidi); |
| return FALSE; |
| } |
| |
| switch (GST_QUERY_TYPE (query)) { |
| case GST_QUERY_DURATION: |
| gst_query_set_duration (query, GST_FORMAT_TIME, |
| wildmidi->o_len * wildmidi->time_per_frame); |
| break; |
| case GST_QUERY_POSITION: |
| gst_query_set_position (query, GST_FORMAT_TIME, |
| wildmidi->o_segment->last_stop * wildmidi->time_per_frame); |
| 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: |
| gst_query_set_segment (query, wildmidi->o_segment->rate, |
| wildmidi->o_segment->format, wildmidi->o_segment->start, |
| wildmidi->o_segment->stop); |
| break; |
| case GST_QUERY_SEEKING: |
| gst_query_set_seeking (query, wildmidi->o_segment->format, |
| TRUE, 0, wildmidi->o_len); |
| break; |
| default: |
| res = FALSE; |
| break; |
| } |
| |
| gst_object_unref (wildmidi); |
| return res; |
| } |
| |
| static gboolean |
| gst_wildmidi_get_upstream_size (GstWildmidi * wildmidi, gint64 * size) |
| { |
| GstFormat format = GST_FORMAT_BYTES; |
| |
| gboolean res = FALSE; |
| |
| GstPad *peer = gst_pad_get_peer (wildmidi->sinkpad); |
| |
| if (peer != NULL) |
| res = gst_pad_query_duration (peer, &format, size) && *size >= 0; |
| |
| gst_object_unref (peer); |
| return res; |
| } |
| |
| static GstSegment * |
| gst_wildmidi_get_segment (GstWildmidi * wildmidi, GstFormat format, |
| gboolean update) |
| { |
| gint64 start, stop, time; |
| |
| GstSegment *segment = gst_segment_new (); |
| |
| gst_wildmidi_src_convert (wildmidi, |
| wildmidi->o_segment->format, wildmidi->o_segment->start, &format, &start); |
| |
| if (wildmidi->o_segment->stop == GST_CLOCK_TIME_NONE) { |
| stop = GST_CLOCK_TIME_NONE; |
| } else { |
| gst_wildmidi_src_convert (wildmidi, |
| wildmidi->o_segment->format, wildmidi->o_segment->stop, &format, &stop); |
| } |
| |
| gst_wildmidi_src_convert (wildmidi, |
| wildmidi->o_segment->format, wildmidi->o_segment->time, &format, &time); |
| |
| gst_segment_set_newsegment_full (segment, update, |
| wildmidi->o_segment->rate, wildmidi->o_segment->applied_rate, |
| format, start, stop, time); |
| |
| segment->last_stop = time; |
| |
| return segment; |
| } |
| |
| static GstEvent * |
| gst_wildmidi_get_new_segment_event (GstWildmidi * wildmidi, GstFormat format, |
| gboolean update) |
| { |
| GstSegment *segment; |
| |
| GstEvent *event; |
| |
| segment = gst_wildmidi_get_segment (wildmidi, 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_wildmidi_src_event (GstPad * pad, GstEvent * event) |
| { |
| gboolean res = FALSE; |
| |
| GstWildmidi *wildmidi = GST_WILDMIDI (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 (!wildmidi->song) |
| break; |
| |
| gst_event_parse_seek (event, &rate, &src_format, &flags, |
| &start_type, &orig_start, &stop_type, &stop); |
| |
| dst_format = GST_FORMAT_DEFAULT; |
| |
| gst_wildmidi_src_convert (wildmidi, src_format, orig_start, |
| &dst_format, &start); |
| gst_wildmidi_src_convert (wildmidi, 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 (wildmidi->srcpad, gst_event_new_flush_start ()); |
| } else { |
| gst_pad_stop_task (wildmidi->sinkpad); |
| } |
| |
| GST_PAD_STREAM_LOCK (wildmidi->sinkpad); |
| |
| if (flush) { |
| gst_pad_push_event (wildmidi->srcpad, gst_event_new_flush_stop ()); |
| } |
| |
| gst_segment_set_seek (wildmidi->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 (wildmidi, "received segment seek %d, %d", |
| (gint) start_type, (gint) stop_type); |
| } else { |
| GST_DEBUG_OBJECT (wildmidi, "received normal seek %d", |
| (gint) start_type); |
| update = FALSE; |
| } |
| |
| gst_pad_push_event (wildmidi->srcpad, |
| gst_wildmidi_get_new_segment_event (wildmidi, GST_FORMAT_TIME, |
| update)); |
| |
| wildmidi->o_seek = TRUE; |
| |
| gst_pad_start_task (wildmidi->sinkpad, |
| (GstTaskFunction) gst_wildmidi_loop, wildmidi->sinkpad); |
| |
| GST_PAD_STREAM_UNLOCK (wildmidi->sinkpad); |
| GST_DEBUG ("seek done"); |
| } |
| res = TRUE; |
| break; |
| default: |
| break; |
| } |
| |
| g_object_unref (wildmidi); |
| return res; |
| } |
| |
| static gboolean |
| gst_wildmidi_activate (GstPad * sinkpad) |
| { |
| if (gst_pad_check_pull_range (sinkpad)) |
| return gst_pad_activate_pull (sinkpad, TRUE); |
| |
| return FALSE; |
| } |
| |
| static gboolean |
| gst_wildmidi_activatepull (GstPad * pad, gboolean active) |
| { |
| if (active) { |
| return gst_pad_start_task (pad, (GstTaskFunction) gst_wildmidi_loop, pad); |
| } else { |
| return gst_pad_stop_task (pad); |
| } |
| } |
| |
| static GstBuffer * |
| gst_wildmidi_allocate_buffer (GstWildmidi * wildmidi, gint64 samples) |
| { |
| return gst_buffer_new_and_alloc (samples * wildmidi->bytes_per_frame); |
| } |
| |
| static GstBuffer * |
| gst_wildmidi_clip_buffer (GstWildmidi * wildmidi, GstBuffer * buffer) |
| { |
| gint64 new_start, new_stop; |
| |
| gint64 offset, length; |
| |
| GstBuffer *out; |
| |
| return buffer; |
| |
| if (!gst_segment_clip (wildmidi->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 * wildmidi->bytes_per_frame, |
| length * wildmidi->bytes_per_frame); |
| |
| GST_BUFFER_OFFSET (out) = new_start; |
| GST_BUFFER_OFFSET_END (out) = new_stop; |
| GST_BUFFER_TIMESTAMP (out) = new_start * wildmidi->time_per_frame; |
| GST_BUFFER_DURATION (out) = (new_stop - new_start) * wildmidi->time_per_frame; |
| |
| gst_buffer_unref (buffer); |
| |
| return out; |
| } |
| |
| /* generate audio data and advance internal timers */ |
| static GstBuffer * |
| gst_wildmidi_fill_buffer (GstWildmidi * wildmidi, GstBuffer * buffer) |
| { |
| size_t bytes_read; |
| |
| gint64 samples; |
| |
| bytes_read = |
| WildMidi_GetOutput (wildmidi->song, (char *) GST_BUFFER_DATA (buffer), |
| (unsigned long int) GST_BUFFER_SIZE (buffer)); |
| |
| if (bytes_read == 0) { |
| gst_buffer_unref (buffer); |
| return NULL; |
| } |
| |
| GST_BUFFER_OFFSET (buffer) = |
| wildmidi->o_segment->last_stop * wildmidi->bytes_per_frame; |
| GST_BUFFER_TIMESTAMP (buffer) = |
| wildmidi->o_segment->last_stop * wildmidi->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) / wildmidi->bytes_per_frame; |
| |
| wildmidi->o_segment->last_stop += samples; |
| |
| GST_BUFFER_OFFSET_END (buffer) = |
| wildmidi->o_segment->last_stop * wildmidi->bytes_per_frame; |
| GST_BUFFER_DURATION (buffer) = samples * wildmidi->time_per_frame; |
| |
| GST_DEBUG_OBJECT (wildmidi, |
| "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_wildmidi_get_buffer (GstWildmidi * wildmidi) |
| { |
| GstBuffer *out; |
| |
| out = |
| gst_wildmidi_fill_buffer (wildmidi, |
| gst_wildmidi_allocate_buffer (wildmidi, 256)); |
| |
| if (!out) |
| return NULL; |
| |
| return gst_wildmidi_clip_buffer (wildmidi, out); |
| } |
| |
| static void |
| gst_wildmidi_loop (GstPad * sinkpad) |
| { |
| GstWildmidi *wildmidi = GST_WILDMIDI (GST_PAD_PARENT (sinkpad)); |
| |
| GstBuffer *out; |
| |
| GstFlowReturn ret; |
| |
| if (wildmidi->mididata_size == 0) { |
| if (!gst_wildmidi_get_upstream_size (wildmidi, &wildmidi->mididata_size)) { |
| GST_ELEMENT_ERROR (wildmidi, STREAM, DECODE, (NULL), |
| ("Unable to get song length")); |
| goto paused; |
| } |
| |
| if (wildmidi->mididata) |
| free (wildmidi->mididata); |
| |
| wildmidi->mididata = malloc (wildmidi->mididata_size); |
| wildmidi->mididata_offset = 0; |
| return; |
| } |
| |
| if (wildmidi->mididata_offset < wildmidi->mididata_size) { |
| GstBuffer *buffer; |
| |
| gint64 size; |
| |
| GST_DEBUG_OBJECT (wildmidi, "loading song"); |
| |
| ret = |
| gst_pad_pull_range (wildmidi->sinkpad, wildmidi->mididata_offset, |
| -1, &buffer); |
| if (ret != GST_FLOW_OK) { |
| GST_ELEMENT_ERROR (wildmidi, STREAM, DECODE, (NULL), |
| ("Unable to load song")); |
| goto paused; |
| } |
| |
| size = wildmidi->mididata_size - wildmidi->mididata_offset; |
| if (GST_BUFFER_SIZE (buffer) < size) |
| size = GST_BUFFER_SIZE (buffer); |
| |
| memmove (wildmidi->mididata + wildmidi->mididata_offset, |
| GST_BUFFER_DATA (buffer), size); |
| gst_buffer_unref (buffer); |
| |
| wildmidi->mididata_offset += size; |
| GST_DEBUG_OBJECT (wildmidi, "Song loaded"); |
| return; |
| } |
| |
| if (!wildmidi->song) { |
| struct _WM_Info *info; |
| |
| GST_DEBUG_OBJECT (wildmidi, "Parsing song"); |
| |
| /* this method takes our memory block */ |
| wildmidi->song = |
| WildMidi_OpenBuffer ((unsigned char *) wildmidi->mididata, |
| wildmidi->mididata_size); |
| wildmidi->mididata_size = 0; |
| wildmidi->mididata = NULL; |
| |
| if (!wildmidi->song) { |
| GST_ELEMENT_ERROR (wildmidi, STREAM, DECODE, (NULL), |
| ("Unable to parse midi")); |
| goto paused; |
| } |
| |
| WildMidi_LoadSamples (wildmidi->song); |
| |
| WildMidi_SetOption (wildmidi->song, WM_MO_LINEAR_VOLUME, |
| wildmidi->linear_volume); |
| WildMidi_SetOption (wildmidi->song, WM_MO_EXPENSIVE_INTERPOLATION, |
| wildmidi->high_quality); |
| |
| info = WildMidi_GetInfo (wildmidi->song); |
| wildmidi->o_len = info->approx_total_samples; |
| |
| gst_segment_set_newsegment (wildmidi->o_segment, FALSE, 1.0, |
| GST_FORMAT_DEFAULT, 0, GST_CLOCK_TIME_NONE, 0); |
| |
| gst_pad_push_event (wildmidi->srcpad, |
| gst_wildmidi_get_new_segment_event (wildmidi, GST_FORMAT_TIME, FALSE)); |
| |
| GST_DEBUG_OBJECT (wildmidi, "Parsing song done"); |
| return; |
| } |
| |
| if (wildmidi->o_segment_changed) { |
| GST_DEBUG_OBJECT (wildmidi, "segment changed"); |
| |
| GstSegment *segment = gst_wildmidi_get_segment (wildmidi, GST_FORMAT_TIME, |
| !wildmidi->o_new_segment); |
| |
| GST_LOG_OBJECT (wildmidi, |
| "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 (wildmidi->o_segment->flags & GST_SEEK_FLAG_SEGMENT) { |
| gst_element_post_message (GST_ELEMENT (wildmidi), |
| gst_message_new_segment_start (GST_OBJECT (wildmidi), |
| segment->format, segment->start)); |
| } |
| |
| gst_segment_free (segment); |
| wildmidi->o_segment_changed = FALSE; |
| return; |
| } |
| |
| if (wildmidi->o_seek) { |
| unsigned long int sample; |
| |
| /* perform a seek internally */ |
| sample = wildmidi->o_segment->time; |
| |
| if (wildmidi->accurate_seek) { |
| WildMidi_SampledSeek (wildmidi->song, &sample); |
| } else { |
| WildMidi_FastSeek (wildmidi->song, &sample); |
| } |
| |
| wildmidi->o_segment->last_stop = wildmidi->o_segment->time = sample; |
| } |
| |
| out = gst_wildmidi_get_buffer (wildmidi); |
| if (!out) { |
| GST_LOG_OBJECT (wildmidi, "Song ended, generating eos"); |
| gst_pad_push_event (wildmidi->srcpad, gst_event_new_eos ()); |
| wildmidi->o_seek = FALSE; |
| goto paused; |
| } |
| |
| if (wildmidi->o_seek) { |
| GST_BUFFER_FLAG_SET (out, GST_BUFFER_FLAG_DISCONT); |
| wildmidi->o_seek = FALSE; |
| } |
| |
| gst_buffer_set_caps (out, wildmidi->out_caps); |
| ret = gst_pad_push (wildmidi->srcpad, out); |
| |
| if (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) |
| goto error; |
| |
| return; |
| |
| paused: |
| { |
| GST_DEBUG_OBJECT (wildmidi, "pausing task"); |
| gst_pad_pause_task (wildmidi->sinkpad); |
| return; |
| } |
| error: |
| { |
| GST_ELEMENT_ERROR (wildmidi, STREAM, FAILED, |
| ("Internal data stream error"), |
| ("Streaming stopped, reason %s", gst_flow_get_name (ret))); |
| gst_pad_push_event (wildmidi->srcpad, gst_event_new_eos ()); |
| goto paused; |
| } |
| } |
| |
| 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: |
| wildmidi->out_caps = |
| gst_caps_copy (gst_pad_get_pad_template_caps (wildmidi->srcpad)); |
| wildmidi->mididata = NULL; |
| break; |
| case GST_STATE_CHANGE_READY_TO_PAUSED: |
| wildmidi->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 (wildmidi->song) |
| WildMidi_Close (wildmidi->song); |
| wildmidi->song = NULL; |
| if (wildmidi->mididata) |
| free (wildmidi->mididata); |
| wildmidi->mididata = NULL; |
| break; |
| case GST_STATE_CHANGE_READY_TO_NULL: |
| gst_caps_unref (wildmidi->out_caps); |
| 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 ARG_LINEAR_VOLUME: |
| wildmidi->linear_volume = g_value_get_boolean (value); |
| if (wildmidi->song) |
| WildMidi_SetOption (wildmidi->song, WM_MO_LINEAR_VOLUME, |
| wildmidi->linear_volume); |
| break; |
| case ARG_HIGH_QUALITY: |
| wildmidi->high_quality = g_value_get_boolean (value); |
| if (wildmidi->song) |
| WildMidi_SetOption (wildmidi->song, WM_MO_EXPENSIVE_INTERPOLATION, |
| wildmidi->high_quality); |
| 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 ARG_LINEAR_VOLUME: |
| g_value_set_boolean (value, wildmidi->linear_volume); |
| break; |
| case ARG_HIGH_QUALITY: |
| g_value_set_boolean (value, wildmidi->high_quality); |
| 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) |