gstreamer/ext/wildmidi/gstwildmidi.c
2017-04-12 12:57:57 -03:00

1038 lines
27 KiB
C

/*
* 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., 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
* <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)
*
* ## 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 <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
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 <wouter@blue-gate.be>");
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)