First attempt to code cacasink. Dont expect anything at all yet.

Original commit message from CVS: First attempt to code cacasink. Dont expect anything at all yet.
2025-02-02 04:22:27 +00:00 · 2003-12-15 22:27:28 +00:00 · 2003-12-15 22:27:28 +00:00 · 4ca07c250e
commit 4ca07c250e
parent 0e77f1ade4
3 changed files with 516 additions and 0 deletions
--- a/ext/libcaca/Makefile.am
+++ b/ext/libcaca/Makefile.am
@ -0,0 +1,9 @@
+
+plugin_LTLIBRARIES = libgstcacasink.la
+
+libgstcacasink_la_SOURCES =  gstcacasink.c
+libgstcacasink_la_CFLAGS =  $(GST_CFLAGS) $(CACALIB_CFLAGS)
+libgstcacasink_la_LIBADD = $(CACALIB_LIBS)
+libgstcacasink_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
+noinst_HEADERS = gstcacasink.h
--- a/ext/libcaca/gstcacasink.c
+++ b/ext/libcaca/gstcacasink.c
@ -0,0 +1,411 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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 <string.h>
+#include <sys/time.h>
+
+#include "gstcacasink.h"
+
+/* elementfactory information */
+static GstElementDetails gst_cacasink_details = {
+  "CACA sink",
+  "Sink/Video",
+  "A colored ASCII art videosink",
+  "Zeeshan Ali <zak147@yahoo.com>"
+};
+
+/* cacasink signals and args */
+enum {
+  SIGNAL_FRAME_DISPLAYED,
+  SIGNAL_HAVE_SIZE,
+  LAST_SIGNAL
+};
+
+
+enum {
+  ARG_0,
+  ARG_WIDTH,
+  ARG_HEIGHT,
+  ARG_DITHER,
+  ARG_FRAMES_DISPLAYED,
+  ARG_FRAME_TIME,
+};
+
+GST_PAD_TEMPLATE_FACTORY (sink_template,
+  "sink",
+  GST_PAD_SINK,
+  GST_PAD_ALWAYS,
+  gst_caps_new (
+    "cacasink_caps",
+    "video/x-raw-rgb",
+    GST_VIDEO_RGB_PAD_TEMPLATE_PROPS_24_32
+  )
+)
+
+static void	gst_cacasink_base_init	(gpointer g_class);
+static void	gst_cacasink_class_init	(GstCACASinkClass *klass);
+static void	gst_cacasink_init		(GstCACASink *cacasink);
+
+static void 	gst_cacasink_set_clock 	(GstElement *element, GstClock *clock);
+static void	gst_cacasink_chain	(GstPad *pad, GstData *_data);
+
+static void	gst_cacasink_set_property	(GObject *object, guint prop_id, 
+					 const GValue *value, GParamSpec *pspec);
+static void	gst_cacasink_get_property	(GObject *object, guint prop_id, 
+					 GValue *value, GParamSpec *pspec);
+
+static GstElementStateReturn gst_cacasink_change_state (GstElement *element);
+
+static GstElementClass *parent_class = NULL;
+static guint gst_cacasink_signals[LAST_SIGNAL] = { 0 };
+
+GType
+gst_cacasink_get_type (void)
+{
+  static GType cacasink_type = 0;
+
+  if (!cacasink_type) {
+    static const GTypeInfo cacasink_info = {
+      sizeof(GstCACASinkClass),
+      gst_cacasink_base_init,
+      NULL,
+      (GClassInitFunc) gst_cacasink_class_init,
+      NULL,
+      NULL,
+      sizeof(GstCACASink),
+      0,
+      (GInstanceInitFunc)gst_cacasink_init,
+    };
+    cacasink_type = g_type_register_static(GST_TYPE_ELEMENT, "GstCACASink", &cacasink_info, 0);
+  }
+  return cacasink_type;
+}
+
+#define GST_TYPE_CACADITHER (gst_cacasink_dither_get_type())
+static GType
+gst_cacasink_dither_get_type (void)
+{
+  static GType dither_type = 0;
+  if (!dither_type) {
+    GEnumValue *dithers;
+    gint n_dithers;
+    gint i;
+    gchar caca_dithernames[] = {
+	"NONE", "ORDERED2", "ORDERED4", "ORDERED8", "RANDOM", NULL};
+
+    n_dithers = 5;
+    
+    dithers = g_new0(GEnumValue, n_dithers + 1);
+
+    for (i = 0; i < n_dithers; i++){
+      dithers[i].value = i;
+      dithers[i].value_name = g_strdup (caca_dithernames[i]);
+      dithers[i].value_nick = g_strdup (caca_dithernames[i]);
+    }
+    dithers[i].value = 0;
+    dithers[i].value_name = NULL;
+    dithers[i].value_nick = NULL;
+
+    dither_type = g_enum_register_static ("GstCACASinkDithers", dithers);
+  }
+  return dither_type;
+}
+
+static void
+gst_cacasink_base_init (gpointer g_class)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_add_pad_template (element_class,
+		GST_PAD_TEMPLATE_GET (sink_template));
+  gst_element_class_set_details (element_class, &gst_cacasink_details);
+}
+
+static void
+gst_cacasink_class_init (GstCACASinkClass *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","width",
+                     G_MININT,G_MAXINT,0,G_PARAM_READABLE)); /* CHECKME */
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HEIGHT,
+    g_param_spec_int("height","height","height",
+                     G_MININT,G_MAXINT,0,G_PARAM_READABLE)); /* CHECKME */
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DITHER,
+    g_param_spec_enum("dither","dither","dither",
+                      GST_TYPE_CACADITHER,0,G_PARAM_READWRITE)); /* CHECKME! */
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FRAMES_DISPLAYED,
+    g_param_spec_int("frames_displayed","frames_displayed","frames_displayed",
+                     G_MININT,G_MAXINT,0,G_PARAM_READABLE)); /* CHECKME */
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FRAME_TIME,
+    g_param_spec_int("frame_time","frame_time","frame_time",
+                     G_MININT,G_MAXINT,0,G_PARAM_READABLE)); /* CHECKME */
+
+  gobject_class->set_property = gst_cacasink_set_property;
+  gobject_class->get_property = gst_cacasink_get_property;
+
+  gst_cacasink_signals[SIGNAL_FRAME_DISPLAYED] =
+    g_signal_new ("frame_displayed", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
+                   G_STRUCT_OFFSET (GstCACASinkClass, frame_displayed), NULL, NULL,
+                   g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+  gst_cacasink_signals[SIGNAL_HAVE_SIZE] =
+    g_signal_new ("have_size", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
+                   G_STRUCT_OFFSET (GstCACASinkClass, have_size), NULL, NULL,
+                   gst_marshal_VOID__INT_INT, G_TYPE_NONE, 2,
+                   G_TYPE_UINT, G_TYPE_UINT);
+
+  gstelement_class->change_state = gst_cacasink_change_state;
+  gstelement_class->set_clock    = gst_cacasink_set_clock;
+}
+
+static GstPadLinkReturn
+gst_cacasink_sinkconnect (GstPad *pad, GstCaps *caps)
+{
+  GstCACASink *cacasink;
+
+  cacasink = GST_CACASINK (gst_pad_get_parent (pad));
+
+  if (!GST_CAPS_IS_FIXED (caps))
+    return GST_PAD_LINK_DELAYED;
+  
+  gst_caps_get_int (caps, "width", &cacasink->image_width);
+  gst_caps_get_int (caps, "height", &cacasink->image_height);
+  gst_caps_get_int (caps, "bpp", &cacasink->bpp);
+  gst_caps_get_int (caps, "red_mask", &cacasink->red_mask);
+  gst_caps_get_int (caps, "green_mask", &cacasink->green_mask);
+  gst_caps_get_int (caps, "blue_mask", &cacasink->blue_mask);
+
+  g_signal_emit( G_OBJECT (cacasink), gst_cacasink_signals[SIGNAL_HAVE_SIZE], 0,
+		 cacasink->image_width, cacasink->image_height);
+
+  /*if (cacasink->bitmap != NULL) {
+    caca_free_bitmap (cacasink->bitmap);
+  }
+
+  caca->bitmap = caca_create_bitmap (cacasink->bpp, cacasink->image_width, cacasink->image_height, cacasink->image_width * cacasink->bpp/8, cacasink->red_mask, cacasink->green_mask, cacasink->blue_mask);*/
+
+  return GST_PAD_LINK_OK;
+}
+
+static void
+gst_cacasink_set_clock (GstElement *element, GstClock *clock)
+{
+  GstCACASink *cacasink = GST_CACASINK (element);
+
+  cacasink->clock = clock;
+}
+
+static void
+gst_cacasink_init (GstCACASink *cacasink)
+{
+  cacasink->sinkpad = gst_pad_new_from_template (
+		  GST_PAD_TEMPLATE_GET (sink_template), "sink");
+  gst_element_add_pad (GST_ELEMENT (cacasink), cacasink->sinkpad);
+  gst_pad_set_chain_function (cacasink->sinkpad, gst_cacasink_chain);
+  gst_pad_set_link_function (cacasink->sinkpad, gst_cacasink_sinkconnect);
+
+  cacasink->screen_width = -1;
+  cacasink->screen_height = -1;
+  cacasink->image_width = GST_CACA_DEFAULT_IMAGE_WIDTH;
+  cacasink->image_height = GST_CACA_DEFAULT_IMAGE_HEIGHT;
+  cacasink->bpp = GST_CACA_DEFAULT_BPP;
+  cacasink->red_mask = GST_CACA_DEFAULT_RED_MASK;
+  cacasink->green_mask = GST_CACA_DEFAULT_GREEN_MASK;
+  cacasink->blue_mask = GST_CACA_DEFAULT_BLUE_MASK;
+
+  cacasink->clock = NULL;
+  cacasink->bitmap = NULL;
+
+  GST_FLAG_SET(cacasink, GST_ELEMENT_THREAD_SUGGESTED);
+}
+
+static void
+gst_cacasink_chain (GstPad *pad, GstData *_data)
+{
+  GstBuffer *buf = GST_BUFFER (_data);
+  GstCACASink *cacasink;
+
+  g_return_if_fail (pad != NULL);
+  g_return_if_fail (GST_IS_PAD (pad));
+  g_return_if_fail (buf != NULL);
+
+  cacasink = GST_CACASINK (gst_pad_get_parent (pad));
+
+  GST_DEBUG ("videosink: clock wait: %" G_GUINT64_FORMAT, GST_BUFFER_TIMESTAMP(buf));
+
+  if (cacasink->clock) {
+    GstClockID id = gst_clock_new_single_shot_id (cacasink->clock, GST_BUFFER_TIMESTAMP(buf));
+    gst_element_clock_wait (GST_ELEMENT (cacasink), id, NULL);
+    gst_clock_id_free (id);
+  }
+
+  caca_draw_bitmap (0, 0, cacasink->screen_width-1, cacasink->screen_height-1, cacasink->bitmap, GST_BUFFER_DATA (buf));
+  caca_refresh ();
+
+  g_signal_emit(G_OBJECT(cacasink),gst_cacasink_signals[SIGNAL_FRAME_DISPLAYED], 0);
+
+  gst_buffer_unref(buf);
+}
+
+
+static void
+gst_cacasink_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+  GstCACASink *cacasink;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail (GST_IS_CACASINK (object));
+
+  cacasink = GST_CACASINK (object);
+
+  switch (prop_id) {
+    case ARG_DITHER: {
+      cacasink->dither = g_value_get_enum (value);
+      break;
+    }
+    default:
+      break;
+  }
+}
+
+static void
+gst_cacasink_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+  GstCACASink *cacasink;
+
+  /* it's not null if we got it, but it might not be ours */
+  cacasink = GST_CACASINK(object);
+
+  switch (prop_id) {
+    case ARG_WIDTH: {
+      g_value_set_int (value, cacasink->screen_width);
+      break;
+    }
+    case ARG_HEIGHT: {
+      g_value_set_int (value, cacasink->screen_height);
+      break;
+    }
+    case ARG_DITHER: {
+      g_value_set_enum (value, cacasink->dither);
+      break;
+    }
+    case ARG_FRAMES_DISPLAYED: {
+      g_value_set_int (value, cacasink->frames_displayed);
+      break;
+    }
+    case ARG_FRAME_TIME: {
+      g_value_set_int (value, cacasink->frame_time/1000000);
+      break;
+    }
+    default: {
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+  }
+}
+
+static gboolean
+gst_cacasink_open (GstCACASink *cacasink)
+{
+  g_return_val_if_fail (!GST_FLAG_IS_SET (cacasink ,GST_CACASINK_OPEN), FALSE);
+
+  caca_init ();
+
+  screen_width = caca_get_width ();
+  screen_height = caca_get_height ();
+  caca_set_dithering (cacasink->dither);
+
+  caca->bitmap = caca_create_bitmap (
+			cacasink->bpp, 
+			cacasink->image_width, 
+			cacasink->image_height, 
+			cacasink->image_width * cacasink->bpp/8, 
+			cacasink->red_mask, 
+			cacasink->green_mask, 
+			cacasink->blue_mask);
+
+  GST_FLAG_SET (cacasink, GST_CACASINK_OPEN);
+
+  return TRUE;
+}
+
+static void
+gst_cacasink_close (GstCACASink *cacasink)
+{
+  g_return_if_fail (GST_FLAG_IS_SET (cacasink ,GST_CACASINK_OPEN));
+
+  caca_free_bitmap (cacasink->bitmap);
+  cacasink->bitmap = NULL;
+  caca_end ();
+
+  GST_FLAG_UNSET (cacasink, GST_CACASINK_OPEN);
+}
+
+static GstElementStateReturn
+gst_cacasink_change_state (GstElement *element)
+{
+  g_return_val_if_fail (GST_IS_CACASINK (element), GST_STATE_FAILURE);
+
+  if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
+    if (GST_FLAG_IS_SET (element, GST_CACASINK_OPEN))
+      gst_cacasink_close (GST_CACASINK (element));
+  } else {
+    if (!GST_FLAG_IS_SET (element, GST_CACASINK_OPEN)) {
+      if (!gst_cacasink_open (GST_CACASINK (element)))
+        return GST_STATE_FAILURE;
+    }
+  }
+
+  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)
+{
+  if (!gst_element_register (plugin, "cacasink", GST_RANK_NONE, GST_TYPE_CACASINK))
+    return FALSE;
+
+  return TRUE;
+}
+
+GST_PLUGIN_DEFINE (
+  GST_VERSION_MAJOR,
+  GST_VERSION_MINOR,
+  "cacasink",
+  "Colored ASCII Art video sink",
+  plugin_init,
+  VERSION,
+  "GPL",
+  GST_PACKAGE,
+  GST_ORIGIN
+)
--- a/ext/libcaca/gstcacasink.h
+++ b/ext/libcaca/gstcacasink.h
@ -0,0 +1,96 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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.
+ */
+
+
+#ifndef __GST_CACASINK_H__
+#define __GST_CACASINK_H__
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+
+#include <caca.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+#define GST_CACA_DEFAULT_IMAGE_WIDTH 320
+#define GST_CACA_DEFAULT_IMAGE_HEIGHT 240
+#define GST_CACA_DEFAULT_BPP 32
+#define GST_CACA_DEFAULT_RED_MASK R_MASK_32 
+#define GST_CACA_DEFAULT_GREEN_MASK G_MASK_32 
+#define GST_CACA_DEFAULT_BLUE_MASK B_MASK_32 
+
+#define GST_TYPE_CACASINK \
+  (gst_cacasink_get_type())
+#define GST_CACASINK(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CACASINK,GstCACASink))
+#define GST_CACASINK_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CACASINK,GstCACASink))
+#define GST_IS_CACASINK(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CACASINK))
+#define GST_IS_CACASINK_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CACASINK))
+
+typedef enum {
+  GST_CACASINK_OPEN              = GST_ELEMENT_FLAG_LAST,
+
+  GST_CACASINK_FLAG_LAST = GST_ELEMENT_FLAG_LAST + 2,
+} GstCACASinkFlags;
+
+typedef struct _GstCACASink GstCACASink;
+typedef struct _GstCACASinkClass GstCACASinkClass;
+
+struct _GstCACASink {
+  GstElement element;
+
+  GstPad *sinkpad;
+
+  gulong format;
+  gint screen_width, screen_height;
+  gint image_width, image_height;
+  guint bpp;
+  guint dither;
+  guint red_mask, green_mask, blue_mask;
+
+  gint frames_displayed;
+  guint64 frame_time;
+
+  GstClock *clock;
+
+  struct caca_bitmap *bitmap;
+};
+
+struct _GstCACASinkClass {
+  GstElementClass parent_class;
+
+  /* signals */
+  void (*frame_displayed) (GstElement *element);
+  void (*have_size) 	  (GstElement *element, guint width, guint height);
+};
+
+GType gst_cacasink_get_type(void);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GST_CACASINKE_H__ */