gstreamer/gst/chart/gstchart.c
Wim Taymans 93e9ac34a1 Bring the plugins in sync with the new core capsnego system.
Original commit message from CVS:
Bring the plugins in sync with the new core capsnego system.
Added some features, enhancements...
2002-01-13 22:27:25 +00:00

446 lines
12 KiB
C

/* gstchart.c: implementation of chart 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>
#define GST_TYPE_CHART (gst_chart_get_type())
#define GST_CHART(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CHART,GstChart))
#define GST_CHART_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CHART,GstChart))
#define GST_IS_CHART(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CHART))
#define GST_IS_CHART_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CHART))
typedef struct _GstChart GstChart;
typedef struct _GstChartClass GstChartClass;
struct _GstChart {
GstElement element;
/* pads */
GstPad *sinkpad,*srcpad;
GstBufferPool *peerpool;
// the timestamp of the next frame
guint64 next_time;
// video state
gint bpp;
gint depth;
gint width;
gint height;
gboolean first_buffer;
gint samplerate;
gint framerate; // desired frame rate
gint samples_between_frames; // number of samples between start of successive frames
gint samples_since_last_frame; // number of samples between start of successive frames
};
struct _GstChartClass {
GstElementClass parent_class;
};
GType gst_chart_get_type(void);
/* elementfactory information */
static GstElementDetails gst_chart_details = {
"chart drawer",
"Filter/Visualization",
"Takes frames of data and outputs video frames of a chart of data",
VERSION,
"Richard Boulton <richard@tartarus.org>",
"(C) 2001",
};
/* signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
/* FILL ME */
};
static GstPadTemplate*
src_template_factory (void)
{
static GstPadTemplate *template = NULL;
if (!template) {
template = gst_padtemplate_new (
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
gst_caps_new (
"chartsrc",
"video/raw",
/*gst_props_new (
"format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('R','G','B',' ')),
"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),
NULL),*/
gst_props_new (
"format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('R','G','B',' ')),
"bpp", GST_PROPS_INT (16),
"depth", GST_PROPS_INT (16),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"red_mask", GST_PROPS_INT (0xf800),
"green_mask", GST_PROPS_INT (0x07e0),
"blue_mask", GST_PROPS_INT (0x001f),
"width", GST_PROPS_INT_RANGE (16, 4096),
"height", GST_PROPS_INT_RANGE (16, 4096),
NULL)
),
NULL);
}
return template;
}
static GstPadTemplate*
sink_template_factory (void)
{
static GstPadTemplate *template = NULL;
if (!template) {
template = gst_padtemplate_new (
"sink", /* the name of the pads */
GST_PAD_SINK, /* type of the pad */
GST_PAD_ALWAYS, /* ALWAYS/SOMETIMES */
gst_caps_new (
"chartsink", /* the name of the caps */
"audio/raw", /* the mime type of the caps */
gst_props_new (
/* 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 (1),
NULL)
),
NULL);
}
return template;
}
static void gst_chart_class_init (GstChartClass *klass);
static void gst_chart_init (GstChart *chart);
static void gst_chart_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_chart_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static void gst_chart_chain (GstPad *pad, GstBuffer *buf);
static GstPadConnectReturn
gst_chart_sinkconnect (GstPad *pad, GstCaps *caps);
static GstElementClass *parent_class = NULL;
GType
gst_chart_get_type (void)
{
static GType type = 0;
if (!type) {
static const GTypeInfo info = {
sizeof(GstChartClass), NULL, NULL, (GClassInitFunc)gst_chart_class_init,
NULL,
NULL,
sizeof(GstChart),
0,
(GInstanceInitFunc)gst_chart_init,
};
type = g_type_register_static(GST_TYPE_ELEMENT, "GstChart", &info, 0);
}
return type;
}
static void
gst_chart_class_init(GstChartClass *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->set_property = gst_chart_set_property;
gobject_class->get_property = gst_chart_get_property;
}
static void
gst_chart_init (GstChart *chart)
{
/* create the sink and src pads */
chart->sinkpad = gst_pad_new_from_template (sink_template_factory (), "sink");
chart->srcpad = gst_pad_new_from_template (src_template_factory (), "src");
gst_element_add_pad (GST_ELEMENT (chart), chart->sinkpad);
gst_element_add_pad (GST_ELEMENT (chart), chart->srcpad);
gst_pad_set_chain_function (chart->sinkpad, gst_chart_chain);
gst_pad_set_connect_function (chart->sinkpad, gst_chart_sinkconnect);
chart->next_time = 0;
chart->peerpool = NULL;
// reset the initial video state
chart->bpp = 16;
chart->depth = 16;
chart->first_buffer = TRUE;
chart->width = 256;
chart->height = 128;
chart->samplerate = -1;
chart->framerate = 25; // desired frame rate
chart->samples_between_frames = 0; // number of samples between start of successive frames
chart->samples_since_last_frame = 0;
}
static GstPadConnectReturn
gst_chart_sinkconnect (GstPad *pad, GstCaps *caps)
{
GstChart *chart;
chart = GST_CHART (gst_pad_get_parent (pad));
chart->samplerate = gst_caps_get_int (caps, "rate");
chart->samples_between_frames = chart->samplerate / chart->framerate;
GST_DEBUG (0, "CHART: new sink caps: rate %d\n",
chart->samplerate);
//gst_chart_sync_parms (chart);
//
return GST_PAD_CONNECT_OK;
}
static void
gst_chart_free (GstChart *chart)
{
g_free (chart);
}
static void
draw_chart_16bpp(guchar * output, gint width, gint height,
gint16 * src_data, gint src_size)
{
gint i;
guint16 *colstart;
gint16 * in;
GST_DEBUG (0, "CHART: drawing frame to %p, width = %d, height = %d, src_data = %p, src_size = %d\n",
output, width, height, src_data, src_size);
for (colstart = (guint16 *)output, in = (gint16 *)src_data, i = 0;
i < width;
colstart++, in++, i++) {
guint16 * pos = colstart;
gint h1;
h1 = (((gint)(*in)) * height / (1 << 16)) + height / 2;
if (h1 >= height) h1 = height;
if (h1 < height / 2) {
while (pos < colstart + h1 * width) {
*pos = 0x0000;
pos += width;
}
while (pos < colstart + height / 2 * width) {
*pos = 0x07e0;
pos += width;
}
while (pos < colstart + height * width) {
*pos = 0x0000;
pos += width;
}
} else {
while (pos < colstart + height / 2 * width) {
*pos = 0x0000;
pos += width;
}
while (pos < colstart + h1 * width) {
*pos = 0x07e0;
pos += width;
}
while (pos < colstart + height * width) {
*pos = 0x0000;
pos += width;
}
}
}
}
static void
gst_chart_chain (GstPad *pad, GstBuffer *bufin)
{
GstChart *chart;
GstBuffer *bufout;
guint32 samples_in;
guint32 sizeout;
gint16 *datain;
guchar *dataout;
g_return_if_fail (bufin != NULL);
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD(pad));
g_return_if_fail (GST_IS_CHART(GST_OBJECT_PARENT(pad)));
chart = GST_CHART(GST_OBJECT_PARENT (pad));
g_return_if_fail (chart != NULL);
GST_DEBUG (0, "CHART: chainfunc called\n");
samples_in = GST_BUFFER_SIZE (bufin) / sizeof(gint16);
datain = (gint16 *) (GST_BUFFER_DATA (bufin));
GST_DEBUG (0, "input buffer has %d samples\n", samples_in);
if (chart->next_time <= GST_BUFFER_TIMESTAMP (bufin)) {
chart->next_time = GST_BUFFER_TIMESTAMP (bufin);
GST_DEBUG (0, "in: %lld\n", GST_BUFFER_TIMESTAMP (bufin));
}
chart->samples_since_last_frame += samples_in;
if (chart->samples_between_frames <= chart->samples_since_last_frame) {
chart->samples_since_last_frame = 0;
// get data to draw into buffer
if (samples_in >= chart->width) {
// make a new buffer for the output
bufout = gst_buffer_new ();
sizeout = chart->bpp / 8 * chart->width * chart->height;
dataout = g_malloc (sizeout);
GST_BUFFER_SIZE(bufout) = sizeout;
GST_BUFFER_DATA(bufout) = dataout;
GST_DEBUG (0, "CHART: made new buffer: size %d, width %d, height %d\n",
sizeout, chart->width, chart->height);
// take data and draw to new buffer
// FIXME: call different routines for different properties
draw_chart_16bpp(dataout, chart->width, chart->height, (gint16 *)datain, samples_in);
gst_buffer_unref(bufin);
// set timestamp
GST_BUFFER_TIMESTAMP (bufout) = chart->next_time;
// Check if we need to renegotiate size.
if (chart->first_buffer) {
GST_DEBUG (0, "making new pad\n");
if (!gst_pad_try_set_caps (chart->srcpad,
GST_CAPS_NEW (
"chartsrc",
"video/raw",
"format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('R','G','B',' ')),
"bpp", GST_PROPS_INT (chart->bpp),
"depth", GST_PROPS_INT (chart->depth),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"red_mask", GST_PROPS_INT (0xf800),
"green_mask", GST_PROPS_INT (0x07e0),
"blue_mask", GST_PROPS_INT (0x001f),
"width", GST_PROPS_INT (chart->width),
"height", GST_PROPS_INT (chart->height)
)))
{
gst_element_error (GST_ELEMENT (chart), "could not set caps");
return;
}
chart->first_buffer = FALSE;
}
GST_DEBUG (0, "CHART: outputting buffer\n");
// output buffer
GST_BUFFER_FLAG_SET (bufout, GST_BUFFER_READONLY);
gst_pad_push (chart->srcpad, bufout);
}
} else {
GST_DEBUG (0, "CHART: skipping buffer\n");
gst_buffer_unref(bufin);
}
GST_DEBUG (0, "CHART: exiting chainfunc\n");
}
static void
gst_chart_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstChart *chart;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_CHART (object));
chart = GST_CHART (object);
switch (prop_id) {
default:
break;
}
}
static void
gst_chart_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstChart *chart;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_CHART (object));
chart = GST_CHART (object);
switch (prop_id) {
default:
break;
}
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
/* create an elementfactory for the chart element */
factory = gst_elementfactory_new("chart",GST_TYPE_CHART,
&gst_chart_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_elementfactory_add_padtemplate (factory, src_template_factory ());
gst_elementfactory_add_padtemplate (factory, sink_template_factory ());
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"chart",
plugin_init
};