mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-04 23:46:43 +00:00
1d5f318e0d
Original commit message from CVS: plugins part of license field patch
441 lines
12 KiB
C
441 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",
|
|
"Visualization",
|
|
"LGPL",
|
|
"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_pad_template_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_pad_template_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));
|
|
|
|
gst_caps_get_int (caps, "rate", &chart->samplerate);
|
|
chart->samples_between_frames = chart->samplerate / chart->framerate;
|
|
|
|
GST_DEBUG (0, "CHART: new sink caps: rate %d",
|
|
chart->samplerate);
|
|
/*gst_chart_sync_parms (chart); */
|
|
/* */
|
|
return GST_PAD_CONNECT_OK;
|
|
}
|
|
|
|
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",
|
|
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");
|
|
|
|
samples_in = GST_BUFFER_SIZE (bufin) / sizeof(gint16);
|
|
datain = (gint16 *) (GST_BUFFER_DATA (bufin));
|
|
GST_DEBUG (0, "input buffer has %d samples", samples_in);
|
|
if (chart->next_time <= GST_BUFFER_TIMESTAMP (bufin)) {
|
|
chart->next_time = GST_BUFFER_TIMESTAMP (bufin);
|
|
GST_DEBUG (0, "in: %lld", 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",
|
|
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");
|
|
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)
|
|
)) <= 0)
|
|
{
|
|
gst_element_error (GST_ELEMENT (chart), "could not set caps");
|
|
return;
|
|
}
|
|
chart->first_buffer = FALSE;
|
|
}
|
|
|
|
GST_DEBUG (0, "CHART: outputting buffer");
|
|
/* output buffer */
|
|
GST_BUFFER_FLAG_SET (bufout, GST_BUFFER_READONLY);
|
|
gst_pad_push (chart->srcpad, bufout);
|
|
}
|
|
} else {
|
|
GST_DEBUG (0, "CHART: skipping buffer");
|
|
gst_buffer_unref(bufin);
|
|
}
|
|
|
|
GST_DEBUG (0, "CHART: exiting chainfunc");
|
|
}
|
|
|
|
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_element_factory_new("chart",GST_TYPE_CHART,
|
|
&gst_chart_details);
|
|
g_return_val_if_fail(factory != NULL, FALSE);
|
|
|
|
gst_element_factory_add_pad_template (factory, src_template_factory ());
|
|
gst_element_factory_add_pad_template (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
|
|
};
|