gstreamer/gst/synaesthesia/gstsynaesthesia.c

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/* gstsynaesthesia.c: implementation of synaesthesia drawing element
* Copyright (C) <2001> Richard Boulton <richard@tartarus.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/audio/audio.h>
#include "synaescope.h"
#define GST_TYPE_SYNAESTHESIA (gst_synaesthesia_get_type())
#define GST_SYNAESTHESIA(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SYNAESTHESIA,GstSynaesthesia))
#define GST_SYNAESTHESIA_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SYNAESTHESIA,GstSynaesthesia))
#define GST_IS_SYNAESTHESIA(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SYNAESTHESIA))
#define GST_IS_SYNAESTHESIA_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SYNAESTHESIA))
typedef struct _GstSynaesthesia GstSynaesthesia;
typedef struct _GstSynaesthesiaClass GstSynaesthesiaClass;
struct _GstSynaesthesia {
GstElement element;
/* pads */
GstPad *sinkpad,*srcpad;
/* the timestamp of the next frame */
guint64 next_time;
gint16 datain[2][512];
/* video state */
gfloat fps;
gint width;
gint height;
gboolean first_buffer;
};
struct _GstSynaesthesiaClass {
GstElementClass parent_class;
};
GType gst_synaesthesia_get_type(void);
/* elementfactory information */
static GstElementDetails gst_synaesthesia_details = GST_ELEMENT_DETAILS (
"Synaesthesia",
"Visualization",
"Creates video visualizations of audio input, using stereo and pitch information",
"Richard Boulton <richard@tartarus.org>"
);
/* signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_WIDTH,
ARG_HEIGHT,
ARG_FPS,
/* FILL ME */
};
static GstStaticPadTemplate gst_synaesthesia_src_template =
GST_STATIC_PAD_TEMPLATE (
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_RGB_PAD_TEMPLATE_CAPS_32)
);
static GstStaticPadTemplate gst_synaesthesia_sink_template =
GST_STATIC_PAD_TEMPLATE (
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ( GST_AUDIO_INT_STANDARD_PAD_TEMPLATE_CAPS )
);
static void gst_synaesthesia_base_init (gpointer g_class);
static void gst_synaesthesia_class_init (GstSynaesthesiaClass *klass);
static void gst_synaesthesia_init (GstSynaesthesia *synaesthesia);
static void gst_synaesthesia_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec);
static void gst_synaesthesia_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static void gst_synaesthesia_chain (GstPad *pad, GstData *_data);
static GstElementStateReturn
gst_synaesthesia_change_state (GstElement *element);
static GstPadLinkReturn
gst_synaesthesia_sink_link (GstPad *pad, const GstCaps *caps);
static GstElementClass *parent_class = NULL;
GType
gst_synaesthesia_get_type (void)
{
static GType type = 0;
if (!type) {
static const GTypeInfo info = {
sizeof (GstSynaesthesiaClass),
gst_synaesthesia_base_init,
NULL,
(GClassInitFunc) gst_synaesthesia_class_init,
NULL,
NULL,
sizeof (GstSynaesthesia),
0,
(GInstanceInitFunc) gst_synaesthesia_init,
};
type = g_type_register_static (GST_TYPE_ELEMENT, "GstSynaesthesia", &info, 0);
}
return type;
}
static void
gst_synaesthesia_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_synaesthesia_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get(&gst_synaesthesia_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get(&gst_synaesthesia_sink_template));
}
static void
gst_synaesthesia_class_init(GstSynaesthesiaClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*) klass;
gstelement_class = (GstElementClass*) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_WIDTH,
g_param_spec_int ("width","Width","The Width",
1, 2048, 320, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_HEIGHT,
g_param_spec_int ("height","Height","The height",
1, 2048, 320, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FPS,
g_param_spec_float ("fps","FPS","Frames per second",
0., G_MAXFLOAT, 25., G_PARAM_READWRITE));
gobject_class->set_property = gst_synaesthesia_set_property;
gobject_class->get_property = gst_synaesthesia_get_property;
gstelement_class->change_state = gst_synaesthesia_change_state;
}
static void
gst_synaesthesia_init (GstSynaesthesia *synaesthesia)
{
/* create the sink and src pads */
synaesthesia->sinkpad = gst_pad_new_from_template (
gst_static_pad_template_get(&gst_synaesthesia_sink_template), "sink");
synaesthesia->srcpad = gst_pad_new_from_template (
gst_static_pad_template_get(&gst_synaesthesia_src_template), "src");
gst_element_add_pad (GST_ELEMENT (synaesthesia), synaesthesia->sinkpad);
gst_element_add_pad (GST_ELEMENT (synaesthesia), synaesthesia->srcpad);
gst_pad_set_chain_function (synaesthesia->sinkpad, gst_synaesthesia_chain);
gst_pad_set_link_function (synaesthesia->sinkpad, gst_synaesthesia_sink_link);
GST_FLAG_SET (synaesthesia, GST_ELEMENT_EVENT_AWARE);
/* reset the initial video state */
synaesthesia->width = 320;
synaesthesia->height = 200;
synaesthesia->fps = 25.; /* desired frame rate */
}
static GstPadLinkReturn
gst_synaesthesia_sink_link (GstPad *pad, const GstCaps *caps)
{
GstSynaesthesia *synaesthesia;
synaesthesia = GST_SYNAESTHESIA (gst_pad_get_parent (pad));
return GST_PAD_LINK_OK;
}
static void
gst_synaesthesia_chain (GstPad *pad, GstData *_data)
{
GstBuffer *bufin = GST_BUFFER (_data);
GstSynaesthesia *synaesthesia;
GstBuffer *bufout;
guint32 samples_in;
gint16 *data;
gint i;
synaesthesia = GST_SYNAESTHESIA (gst_pad_get_parent (pad));
GST_DEBUG ("Synaesthesia: chainfunc called");
if (GST_IS_EVENT (bufin)) {
GstEvent *event = GST_EVENT (bufin);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_DISCONTINUOUS:
{
gint64 value = 0;
gst_event_discont_get_value (event, GST_FORMAT_TIME, &value);
synaesthesia->next_time = value;
}
default:
gst_pad_event_default (pad, event);
break;
}
return;
}
samples_in = GST_BUFFER_SIZE (bufin) / sizeof (gint16);
GST_DEBUG ("input buffer has %d samples", samples_in);
/* FIXME: should really select the first 1024 samples after the timestamp. */
if (GST_BUFFER_TIMESTAMP (bufin) < synaesthesia->next_time || samples_in < 1024) {
GST_DEBUG ("timestamp is %" G_GUINT64_FORMAT ": want >= %" G_GUINT64_FORMAT, GST_BUFFER_TIMESTAMP (bufin), synaesthesia->next_time);
gst_buffer_unref (bufin);
return;
}
data = (gint16 *) GST_BUFFER_DATA (bufin);
for (i=0; i < 512; i++) {
synaesthesia->datain[0][i] = *data++;
synaesthesia->datain[1][i] = *data++;
}
if (synaesthesia->first_buffer) {
synaesthesia_init (synaesthesia->width, synaesthesia->height);
synaesthesia->first_buffer = FALSE;
}
bufout = gst_buffer_new ();
GST_BUFFER_SIZE (bufout) = synaesthesia->width * synaesthesia->height * 4;
GST_BUFFER_DATA (bufout) = (guchar *) synaesthesia_update (synaesthesia->datain);
GST_BUFFER_TIMESTAMP (bufout) = synaesthesia->next_time;
GST_BUFFER_FLAG_SET (bufout, GST_BUFFER_DONTFREE);
synaesthesia->next_time += GST_SECOND / synaesthesia->fps;
gst_pad_push (synaesthesia->srcpad, GST_DATA (bufout));
gst_buffer_unref (bufin);
GST_DEBUG ("Synaesthesia: exiting chainfunc");
}
static void
gst_synaesthesia_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstSynaesthesia *synaesthesia;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_SYNAESTHESIA (object));
synaesthesia = GST_SYNAESTHESIA (object);
switch (prop_id) {
case ARG_WIDTH:
synaesthesia->width = g_value_get_int (value);
break;
case ARG_HEIGHT:
synaesthesia->height = g_value_get_int (value);
break;
case ARG_FPS:
synaesthesia->fps = g_value_get_float (value);
break;
default:
break;
}
}
static void
gst_synaesthesia_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstSynaesthesia *synaesthesia;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_SYNAESTHESIA (object));
synaesthesia = GST_SYNAESTHESIA (object);
switch (prop_id) {
case ARG_WIDTH:
g_value_set_int (value, synaesthesia->width);
break;
case ARG_HEIGHT:
g_value_set_int (value, synaesthesia->height);
break;
case ARG_FPS:
g_value_set_float (value, synaesthesia->fps);
break;
default:
break;
}
}
static GstElementStateReturn
gst_synaesthesia_change_state (GstElement *element)
{
GstSynaesthesia *synaesthesia;
synaesthesia = GST_SYNAESTHESIA (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_READY_TO_PAUSED:
synaesthesia->next_time = 0;
synaesthesia->first_buffer = TRUE;
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
static gboolean
plugin_init (GstPlugin *plugin)
{
return gst_element_register (plugin, "synaesthesia", GST_RANK_NONE, GST_TYPE_SYNAESTHESIA);
}
GST_PLUGIN_DEFINE (
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"synaesthesia",
"Creates video visualizations of audio input, using stereo and pitch information",
plugin_init,
VERSION,
"GPL",
GST_PACKAGE,
GST_ORIGIN
)