gstreamer/gst/goom/gstgoom.c

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/* gstgoom.c: implementation of goom 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 "goom_core.h"
#define GST_TYPE_GOOM (gst_goom_get_type())
#define GST_GOOM(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GOOM,GstGOOM))
#define GST_GOOM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GOOM,GstGOOM))
#define GST_IS_GOOM(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GOOM))
#define GST_IS_GOOM_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GOOM))
typedef struct _GstGOOM GstGOOM;
typedef struct _GstGOOMClass GstGOOMClass;
struct _GstGOOM {
GstElement element;
/* pads */
GstPad *sinkpad,*srcpad;
/* the timestamp of the next frame */
guint64 next_time;
gint16 datain[2][512];
/* video state */
gdouble fps;
gint width;
gint height;
gint channels;
gboolean srcnegotiated;
};
struct _GstGOOMClass {
GstElementClass parent_class;
};
GType gst_goom_get_type(void);
/* elementfactory information */
static GstElementDetails gst_goom_details = {
"GOOM: what a GOOM!",
"Visualization",
"Takes frames of data and outputs video frames using the GOOM filter",
"Wim Taymans <wim.taymans@chello.be>"
};
/* signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
/* FILL ME */
};
static GstStaticPadTemplate src_template =
GST_STATIC_PAD_TEMPLATE (
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
gst-libs/gst/video/video.h: Fix caps template names to be understandable. Original commit message from CVS: 2004-01-12 Benjamin Otte <in7y118@public.uni-hamburg.de> * gst-libs/gst/video/video.h: Fix caps template names to be understandable. Prefix everything with GST_VIDEO. * ext/aalib/gstaasink.c: * ext/divx/gstdivxdec.c: * ext/divx/gstdivxenc.c: * ext/gdk_pixbuf/gstgdkpixbuf.c: * ext/hermes/gstcolorspace.c: (gst_colorspace_base_init): * ext/jpeg/gstjpegdec.c: (raw_caps_factory): * ext/jpeg/gstjpegenc.c: (raw_caps_factory): * ext/libcaca/gstcacasink.c: * ext/libpng/gstpngenc.c: (raw_caps_factory): * ext/snapshot/gstsnapshot.c: * ext/swfdec/gstswfdec.c: * ext/xvid/gstxviddec.c: * ext/xvid/gstxvidenc.c: * gst/chart/gstchart.c: * gst/deinterlace/gstdeinterlace.c: * gst/effectv/gsteffectv.c: * gst/flx/gstflxdec.c: (gst_flxdec_loop): * gst/goom/gstgoom.c: * gst/median/gstmedian.c: * gst/monoscope/gstmonoscope.c: (gst_monoscope_init), (gst_monoscope_srcconnect), (gst_monoscope_chain): * gst/overlay/gstoverlay.c: * gst/smooth/gstsmooth.c: * gst/smpte/gstsmpte.c: * gst/synaesthesia/gstsynaesthesia.c: * gst/videocrop/gstvideocrop.c: * gst/videodrop/gstvideodrop.c: * gst/y4m/gsty4mencode.c: * sys/qcam/gstqcamsrc.c: * sys/v4l/gstv4lsrc.c: (gst_v4lsrc_palette_to_caps): Make them work with new video.h file. * sys/ximage/ximagesink.c: (gst_ximagesink_chain), (gst_ximagesink_buffer_free), (gst_ximagesink_buffer_alloc): * sys/xvimage/xvimagesink.c: (gst_xvimagesink_chain), (gst_xvimagesink_buffer_free), (gst_xvimagesink_buffer_alloc): Make it work with new buffer allocation system.
2004-01-12 02:01:51 +00:00
GST_STATIC_CAPS ( GST_VIDEO_CAPS_xRGB_HOST_ENDIAN )
);
static GstStaticPadTemplate sink_template =
GST_STATIC_PAD_TEMPLATE (
"sink", /* the name of the pads */
GST_PAD_SINK, /* type of the pad */
GST_PAD_ALWAYS, /* ALWAYS/SOMETIMES */
GST_STATIC_CAPS ( "audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) TRUE, "
"width = (int) 16, "
"depth = (int) 16, "
"rate = (int) [ 8000, 96000 ], "
"channels = (int) [ 1, 2 ]"
)
);
static void gst_goom_class_init (GstGOOMClass *klass);
static void gst_goom_base_init (GstGOOMClass *klass);
static void gst_goom_init (GstGOOM *goom);
static void gst_goom_dispose (GObject *object);
static GstElementStateReturn
gst_goom_change_state (GstElement *element);
static void gst_goom_chain (GstPad *pad, GstData *_data);
static GstPadLinkReturn gst_goom_sinkconnect (GstPad *pad, const GstCaps *caps);
static GstPadLinkReturn gst_goom_srcconnect (GstPad *pad, const GstCaps *caps);
static GstCaps * gst_goom_src_fixate (GstPad *pad, const GstCaps *caps);
static GstElementClass *parent_class = NULL;
GType
gst_goom_get_type (void)
{
static GType type = 0;
if (!type) {
static const GTypeInfo info = {
sizeof (GstGOOMClass),
(GBaseInitFunc) gst_goom_base_init,
NULL,
(GClassInitFunc) gst_goom_class_init,
NULL,
NULL,
sizeof (GstGOOM),
0,
(GInstanceInitFunc) gst_goom_init,
};
type = g_type_register_static (GST_TYPE_ELEMENT, "GstGOOM", &info, 0);
}
return type;
}
static void
gst_goom_base_init (GstGOOMClass *klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_set_details (element_class, &gst_goom_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
}
static void
gst_goom_class_init(GstGOOMClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*) klass;
gstelement_class = (GstElementClass*) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->dispose = gst_goom_dispose;
gstelement_class->change_state = gst_goom_change_state;
}
static void
gst_goom_init (GstGOOM *goom)
{
/* create the sink and src pads */
goom->sinkpad = gst_pad_new_from_template (
gst_static_pad_template_get (&sink_template ), "sink");
goom->srcpad = gst_pad_new_from_template (
gst_static_pad_template_get (&src_template ), "src");
gst_element_add_pad (GST_ELEMENT (goom), goom->sinkpad);
gst_element_add_pad (GST_ELEMENT (goom), goom->srcpad);
GST_FLAG_SET (goom, GST_ELEMENT_EVENT_AWARE);
gst_pad_set_chain_function (goom->sinkpad, gst_goom_chain);
gst_pad_set_link_function (goom->sinkpad, gst_goom_sinkconnect);
gst_pad_set_link_function (goom->srcpad, gst_goom_srcconnect);
gst_pad_set_fixate_function (goom->srcpad, gst_goom_src_fixate);
goom->width = 320;
goom->height = 200;
goom->fps = 25.; /* desired frame rate */
goom->channels = 0;
/* set to something */
goom_init (50, 50);
}
static void
gst_goom_dispose (GObject *object)
{
goom_close ();
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static GstPadLinkReturn
gst_goom_sinkconnect (GstPad *pad, const GstCaps *caps)
{
GstGOOM *goom;
GstStructure *structure;
goom = GST_GOOM (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "channels", &goom->channels);
return GST_PAD_LINK_OK;
}
static GstPadLinkReturn
gst_goom_srcconnect (GstPad *pad, const GstCaps *caps)
{
GstGOOM *goom;
GstStructure *structure;
goom = GST_GOOM (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "width", &goom->width);
gst_structure_get_int (structure, "height", &goom->height);
gst_structure_get_double (structure, "framerate", &goom->fps);
goom_set_resolution (goom->width, goom->height);
goom->srcnegotiated = TRUE;
return GST_PAD_LINK_OK;
}
static GstCaps *
gst_goom_src_fixate (GstPad *pad, const GstCaps *caps)
{
GstCaps *newcaps;
GstStructure *structure;
if (!gst_caps_is_simple (caps)) return NULL;
newcaps = gst_caps_copy (caps);
structure = gst_caps_get_structure (newcaps, 0);
if (gst_caps_structure_fixate_field_nearest_int (structure, "width", 320)) {
return newcaps;
}
if (gst_caps_structure_fixate_field_nearest_int (structure, "height", 240)) {
return newcaps;
}
if (gst_caps_structure_fixate_field_nearest_double (structure, "framerate",
30.0)) {
return newcaps;
}
/* failed to fixate */
gst_caps_free (newcaps);
return NULL;
}
static void
gst_goom_chain (GstPad *pad, GstData *_data)
{
GstBuffer *bufin = GST_BUFFER (_data);
GstGOOM *goom;
GstBuffer *bufout;
guint32 samples_in;
gint16 *data;
gint i;
goom = GST_GOOM (gst_pad_get_parent (pad));
GST_DEBUG ("GOOM: 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);
goom->next_time = value;
}
default:
gst_pad_event_default (pad, event);
break;
}
return;
}
if (goom->channels == 0) {
gst_element_error (goom, CORE, NEGOTIATION, NULL,
("format wasn't negotiated before chain function"));
goto done;
}
if (!GST_PAD_IS_USABLE (goom->srcpad))
goto done;
samples_in = GST_BUFFER_SIZE (bufin) / (sizeof (gint16) * goom->channels);
GST_DEBUG ("input buffer has %d samples", samples_in);
if (GST_BUFFER_TIMESTAMP (bufin) < goom->next_time || samples_in < 512) {
goto done;
}
data = (gint16 *) GST_BUFFER_DATA (bufin);
if (goom->channels == 2) {
for (i=0; i < 512; i++) {
goom->datain[0][i] = *data++;
goom->datain[1][i] = *data++;
}
}
else {
for (i=0; i < 512; i++) {
goom->datain[0][i] = *data;
goom->datain[1][i] = *data++;
}
}
bufout = gst_buffer_new ();
GST_BUFFER_SIZE (bufout) = goom->width * goom->height * 4;
GST_BUFFER_DATA (bufout) = (guchar *) goom_update (goom->datain);
GST_BUFFER_TIMESTAMP (bufout) = goom->next_time;
GST_BUFFER_FLAG_SET (bufout, GST_BUFFER_DONTFREE);
goom->next_time += GST_SECOND / goom->fps;
gst_pad_push (goom->srcpad, GST_DATA (bufout));
done:
gst_buffer_unref (bufin);
GST_DEBUG ("GOOM: exiting chainfunc");
}
static GstElementStateReturn
gst_goom_change_state (GstElement *element)
{
GstGOOM *goom = GST_GOOM (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_NULL:
break;
case GST_STATE_READY_TO_PAUSED:
goom->next_time = 0;
goom->srcnegotiated = FALSE;
goom->channels = 0;
break;
case GST_STATE_PAUSED_TO_READY:
break;
default:
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, "goom",
GST_RANK_NONE, GST_TYPE_GOOM);
}
GST_PLUGIN_DEFINE (
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"goom",
"GOOM visualization filter",
plugin_init,
VERSION,
GST_LICENSE,
GST_PACKAGE,
GST_ORIGIN
)