gstreamer/gst/synaesthesia/gstsynaesthesia.c

368 lines
11 KiB
C
Raw Normal View History

/* 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.
*/
#include <config.h>
#include <gst/gst.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;
GstBufferPool *peerpool;
/* the timestamp of the next frame */
guint64 next_time;
gint16 datain[2][512];
/* video state */
gint 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 = {
"Synaesthesia",
"Filter/Visualization",
"Creates video visualizations of audio input, using stereo and pitch information",
VERSION,
"Richard Boulton <richard@tartarus.org>",
"(C) 2002",
};
/* signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_WIDTH,
ARG_HEIGHT,
ARG_FPS,
/* FILL ME */
};
GST_PAD_TEMPLATE_FACTORY (src_template,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"synaesthesiasrc",
"video/raw",
"format", GST_PROPS_FOURCC (GST_STR_FOURCC ("RGB ")),
"bpp", GST_PROPS_INT (32),
"depth", GST_PROPS_INT (32),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"red_mask", GST_PROPS_INT (0xff0000),
"green_mask", GST_PROPS_INT (0xff00),
"blue_mask", GST_PROPS_INT (0xff),
"width", GST_PROPS_INT_RANGE (16, 4096),
"height", GST_PROPS_INT_RANGE (16, 4096)
)
)
GST_PAD_TEMPLATE_FACTORY (sink_template,
"sink", /* the name of the pads */
GST_PAD_SINK, /* type of the pad */
GST_PAD_ALWAYS, /* ALWAYS/SOMETIMES */
GST_CAPS_NEW (
"synaesthesiasink", /* the name of the caps */
"audio/raw", /* the mime type of the caps */
/* Properties follow: */
"format", GST_PROPS_STRING ("int"),
"law", GST_PROPS_INT (0),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"signed", GST_PROPS_BOOLEAN (TRUE),
"width", GST_PROPS_INT (16),
"depth", GST_PROPS_INT (16),
"rate", GST_PROPS_INT_RANGE (8000, 96000),
"channels", GST_PROPS_INT (2)
)
)
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, GstBuffer *buf);
static GstPadConnectReturn
gst_synaesthesia_sinkconnect (GstPad *pad, 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),
NULL,
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_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_int ("fps","FPS","Frames per second",
1, 100, 25, G_PARAM_READWRITE));
gobject_class->set_property = gst_synaesthesia_set_property;
gobject_class->get_property = gst_synaesthesia_get_property;
}
static void
gst_synaesthesia_init (GstSynaesthesia *synaesthesia)
{
/* create the sink and src pads */
synaesthesia->sinkpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (sink_template ), "sink");
synaesthesia->srcpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (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_connect_function (synaesthesia->sinkpad, gst_synaesthesia_sinkconnect);
synaesthesia->next_time = 0;
synaesthesia->peerpool = NULL;
/* reset the initial video state */
synaesthesia->first_buffer = TRUE;
synaesthesia->width = 320;
synaesthesia->height = 200;
synaesthesia->fps = 25; /* desired frame rate */
}
static GstPadConnectReturn
gst_synaesthesia_sinkconnect (GstPad *pad, GstCaps *caps)
{
GstSynaesthesia *synaesthesia;
synaesthesia = GST_SYNAESTHESIA (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps)) {
return GST_PAD_CONNECT_DELAYED;
}
return GST_PAD_CONNECT_OK;
}
static void
gst_synaesthesia_chain (GstPad *pad, GstBuffer *bufin)
{
GstSynaesthesia *synaesthesia;
GstBuffer *bufout;
guint32 samples_in;
gint16 *data;
gint i;
synaesthesia = GST_SYNAESTHESIA (gst_pad_get_parent (pad));
GST_DEBUG (0, "Synaesthesia: chainfunc called");
samples_in = GST_BUFFER_SIZE (bufin) / sizeof (gint16);
GST_DEBUG (0, "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 (0, "timestamp is %llu: want >= %llu", 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) {
GstCaps *caps;
synaesthesia_init (synaesthesia->width, synaesthesia->height);
GST_DEBUG (0, "making new pad");
caps = GST_CAPS_NEW (
"synaesthesiasrc",
"video/raw",
"format", GST_PROPS_FOURCC (GST_STR_FOURCC ("RGB ")),
"bpp", GST_PROPS_INT (32),
"depth", GST_PROPS_INT (32),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"red_mask", GST_PROPS_INT (0xff0000),
"green_mask", GST_PROPS_INT (0x00ff00),
"blue_mask", GST_PROPS_INT (0x0000ff),
"width", GST_PROPS_INT (synaesthesia->width),
"height", GST_PROPS_INT (synaesthesia->height)
);
if (!gst_pad_try_set_caps (synaesthesia->srcpad, caps)) {
gst_element_error (GST_ELEMENT (synaesthesia), "could not set caps");
return;
}
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 += 1000000LL / synaesthesia->fps;
gst_pad_push (synaesthesia->srcpad, bufout);
gst_buffer_unref (bufin);
GST_DEBUG (0, "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_int (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_int (value, synaesthesia->fps);
break;
default:
break;
}
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
/* create an elementfactory for the synaesthesia element */
factory = gst_element_factory_new("synaesthesia",GST_TYPE_SYNAESTHESIA,
&gst_synaesthesia_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (src_template));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (sink_template));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"synaesthesia",
plugin_init
};