Initial revision

Original commit message from CVS:
Initial revision

3 files changed, 467 insertions, 0 deletions

diff --git a/gst/chart/.gitignore b/gst/chart/.gitignore
new file mode 100644
index 00000000..08f5ed37
--- /dev/null
+++ b/gst/chart/.gitignore
@@ -0,0 +1,7 @@
+Makefile
+Makefile.in
+*.o
+*.lo
+*.la
+.deps
+.libs
diff --git a/gst/chart/Makefile.am b/gst/chart/Makefile.am
new file mode 100644
index 00000000..c85c60af
--- /dev/null
+++ b/gst/chart/Makefile.am
@@ -0,0 +1,4 @@
+filterdir = $(libdir)/gst
+filter_LTLIBRARIES = libchart.la
+libchart_la_SOURCES = gstchart.c
+libchart_la_CFLAGS = $(GST_CFLAGS)
diff --git a/gst/chart/gstchart.c b/gst/chart/gstchart.c
new file mode 100644
index 00000000..1ec25970
--- /dev/null
+++ b/gst/chart/gstchart.c
@@ -0,0 +1,456 @@
+/* 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;
+
+  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 GstElementClass *parent_class = NULL;
+
+static void gst_chart_newsinkcaps (GstPad *pad, GstCaps *caps);
+static void gst_chart_newsrccaps (GstPad *pad, GstCaps *caps);
+
+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_newcaps_function (chart->sinkpad, gst_chart_newsinkcaps);
+  gst_pad_set_newcaps_function (chart->srcpad, gst_chart_newsrccaps);
+
+
+  chart->next_time = 0;
+  chart->peerpool = NULL;
+
+  // reset the initial video state
+  chart->bpp = 16;
+  chart->depth = 16;
+  chart->width = -1;
+  chart->height = -1;
+
+  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 void
+gst_chart_newsinkcaps (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);
+}
+
+static void
+gst_chart_newsrccaps (GstPad *pad, GstCaps *caps)
+{
+  GstChart *chart;
+  chart = GST_CHART (gst_pad_get_parent (pad));
+
+  chart->bpp = gst_caps_get_int (caps, "bpp");
+  chart->depth = gst_caps_get_int (caps, "depth");
+  chart->width = gst_caps_get_int (caps, "width");
+  chart->height = gst_caps_get_int (caps, "height");
+
+  GST_DEBUG (0, "CHART: new src caps: bpp %d, depth %d, width %d, height %d\n",
+	     chart->bpp, chart->depth, chart->width, chart->height);
+  //gst_chart_sync_parms (chart);
+}
+
+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;
+
+      // Check if we need to renegotiate size.
+      if (chart->width == -1 || chart->height == -1) {
+	  chart->width = 256;
+	  chart->height = 128;
+	  GST_DEBUG (0, "making new pad\n");
+	  gst_pad_set_caps (chart->srcpad,
+			    gst_caps_new (
+					  "chartsrc",
+					  "video/raw",
+					  gst_props_new (
+							 "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),
+							 NULL)));
+      }
+
+      // 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);
+
+	  // set timestamp
+	  GST_BUFFER_TIMESTAMP (bufout) = chart->next_time;
+
+	  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
+};