2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
20 * SECTION:element-cacasink
21 * @see_also: #GstAASink
23 * Displays video as color ascii art.
26 * <title>Example launch line</title>
28 * CACA_GEOMETRY=160x60 CACA_FONT=5x7 gst-launch filesrc location=test.avi ! decodebin ! ffmpegcolorspace ! cacasink
29 * ]| This pipeline renders a video to ascii art into a separate window using a
30 * small font and specifying the ascii resolution.
32 * CACA_DRIVER=ncurses gst-launch filesrc location=test.avi ! decodebin ! ffmpegcolorspace ! cacasink
33 * ]| This pipeline renders a video to ascii art into the current terminal.
44 #include "gstcacasink.h"
46 #define GST_CACA_DEFAULT_SCREEN_WIDTH 80
47 #define GST_CACA_DEFAULT_SCREEN_HEIGHT 25
48 #define GST_CACA_DEFAULT_BPP 24
49 #define GST_CACA_DEFAULT_RED_MASK GST_VIDEO_BYTE1_MASK_32_INT
50 #define GST_CACA_DEFAULT_GREEN_MASK GST_VIDEO_BYTE2_MASK_32_INT
51 #define GST_CACA_DEFAULT_BLUE_MASK GST_VIDEO_BYTE3_MASK_32_INT
53 //#define GST_CACA_DEFAULT_RED_MASK R_MASK_32_REVERSE_INT
54 //#define GST_CACA_DEFAULT_GREEN_MASK G_MASK_32_REVERSE_INT
55 //#define GST_CACA_DEFAULT_BLUE_MASK B_MASK_32_REVERSE_INT
57 /* elementfactory information */
58 static const GstElementDetails gst_cacasink_details =
59 GST_ELEMENT_DETAILS ("A colored ASCII art video sink",
61 "A colored ASCII art videosink",
62 "Zeeshan Ali <zak147@yahoo.com>");
64 /* cacasink signals and args */
80 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
83 GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB ";" GST_VIDEO_CAPS_RGBx ";"
84 GST_VIDEO_CAPS_RGB_16 ";" GST_VIDEO_CAPS_RGB_15)
87 static void gst_cacasink_base_init (gpointer g_class);
88 static void gst_cacasink_class_init (GstCACASinkClass * klass);
89 static void gst_cacasink_init (GstCACASink * cacasink);
91 static gboolean gst_cacasink_setcaps (GstBaseSink * pad, GstCaps * caps);
92 static void gst_cacasink_get_times (GstBaseSink * sink, GstBuffer * buffer,
93 GstClockTime * start, GstClockTime * end);
94 static GstFlowReturn gst_cacasink_render (GstBaseSink * basesink,
97 static void gst_cacasink_set_property (GObject * object, guint prop_id,
98 const GValue * value, GParamSpec * pspec);
99 static void gst_cacasink_get_property (GObject * object, guint prop_id,
100 GValue * value, GParamSpec * pspec);
102 static GstStateChangeReturn gst_cacasink_change_state (GstElement * element,
103 GstStateChange transition);
105 static GstElementClass *parent_class = NULL;
108 gst_cacasink_get_type (void)
110 static GType cacasink_type = 0;
112 if (!cacasink_type) {
113 static const GTypeInfo cacasink_info = {
114 sizeof (GstCACASinkClass),
115 gst_cacasink_base_init,
117 (GClassInitFunc) gst_cacasink_class_init,
120 sizeof (GstCACASink),
122 (GInstanceInitFunc) gst_cacasink_init,
126 g_type_register_static (GST_TYPE_BASE_SINK, "GstCACASink",
129 return cacasink_type;
132 #define GST_TYPE_CACADITHER (gst_cacasink_dither_get_type())
134 gst_cacasink_dither_get_type (void)
136 static GType dither_type = 0;
138 static const GEnumValue dither_types[] = {
139 {CACA_DITHERING_NONE, "No dithering", "none"},
140 {CACA_DITHERING_ORDERED2, "Ordered 2x2 Bayer dithering", "2x2"},
141 {CACA_DITHERING_ORDERED4, "Ordered 4x4 Bayer dithering", "4x4"},
142 {CACA_DITHERING_ORDERED8, "Ordered 8x8 Bayer dithering", "8x8"},
143 {CACA_DITHERING_RANDOM, "Random dithering", "random"},
148 dither_type = g_enum_register_static ("GstCACASinkDithering", dither_types);
154 gst_cacasink_base_init (gpointer g_class)
156 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
158 gst_element_class_set_details (element_class, &gst_cacasink_details);
159 gst_element_class_add_pad_template (element_class,
160 gst_static_pad_template_get (&sink_template));
164 gst_cacasink_class_init (GstCACASinkClass * klass)
166 GObjectClass *gobject_class;
167 GstElementClass *gstelement_class;
168 GstBaseSinkClass *gstbasesink_class;
170 gobject_class = (GObjectClass *) klass;
171 gstelement_class = (GstElementClass *) klass;
172 gstbasesink_class = (GstBaseSinkClass *) klass;
174 parent_class = g_type_class_peek_parent (klass);
176 gobject_class->set_property = gst_cacasink_set_property;
177 gobject_class->get_property = gst_cacasink_get_property;
178 gstelement_class->change_state = gst_cacasink_change_state;
180 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SCREEN_WIDTH,
181 g_param_spec_int ("screen-width", "Screen Width",
182 "The width of the screen", 0, G_MAXINT, GST_CACA_DEFAULT_SCREEN_WIDTH,
184 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SCREEN_HEIGHT,
185 g_param_spec_int ("screen-height", "Screen Height",
186 "The height of the screen", 0, G_MAXINT,
187 GST_CACA_DEFAULT_SCREEN_HEIGHT, G_PARAM_READABLE));
188 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DITHER,
189 g_param_spec_enum ("dither", "Dither Type", "Set type of Dither",
190 GST_TYPE_CACADITHER, CACA_DITHERING_NONE, G_PARAM_READWRITE));
191 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ANTIALIASING,
192 g_param_spec_boolean ("anti-aliasing", "Anti Aliasing",
193 "Enables Anti-Aliasing", TRUE, G_PARAM_READWRITE));
195 gstbasesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_cacasink_setcaps);
196 gstbasesink_class->get_times = GST_DEBUG_FUNCPTR (gst_cacasink_get_times);
197 gstbasesink_class->preroll = GST_DEBUG_FUNCPTR (gst_cacasink_render);
198 gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_cacasink_render);
202 gst_cacasink_get_times (GstBaseSink * sink, GstBuffer * buffer,
203 GstClockTime * start, GstClockTime * end)
205 *start = GST_BUFFER_TIMESTAMP (buffer);
206 *end = *start + GST_BUFFER_DURATION (buffer);
210 gst_cacasink_setcaps (GstBaseSink * basesink, GstCaps * caps)
212 GstCACASink *cacasink;
213 GstStructure *structure;
215 cacasink = GST_CACASINK (basesink);
217 structure = gst_caps_get_structure (caps, 0);
218 gst_structure_get_int (structure, "width", &(cacasink->width));
219 gst_structure_get_int (structure, "height", &(cacasink->height));
220 gst_structure_get_int (structure, "bpp", (int *) &cacasink->bpp);
221 gst_structure_get_int (structure, "red_mask", (int *) &cacasink->red_mask);
222 gst_structure_get_int (structure, "green_mask",
223 (int *) &cacasink->green_mask);
224 gst_structure_get_int (structure, "blue_mask", (int *) &cacasink->blue_mask);
226 if (cacasink->bpp == 24) {
227 cacasink->red_mask = GUINT32_FROM_BE (cacasink->red_mask) >> 8;
228 cacasink->green_mask = GUINT32_FROM_BE (cacasink->green_mask) >> 8;
229 cacasink->blue_mask = GUINT32_FROM_BE (cacasink->blue_mask) >> 8;
232 else if (cacasink->bpp == 32) {
233 cacasink->red_mask = GUINT32_FROM_BE (cacasink->red_mask);
234 cacasink->green_mask = GUINT32_FROM_BE (cacasink->green_mask);
235 cacasink->blue_mask = GUINT32_FROM_BE (cacasink->blue_mask);
238 else if (cacasink->bpp == 16 || cacasink->bpp == 15) {
239 cacasink->red_mask = GUINT16_FROM_BE (cacasink->red_mask);
240 cacasink->green_mask = GUINT16_FROM_BE (cacasink->green_mask);
241 cacasink->blue_mask = GUINT16_FROM_BE (cacasink->blue_mask);
244 if (cacasink->bitmap) {
245 caca_free_bitmap (cacasink->bitmap);
248 cacasink->bitmap = caca_create_bitmap (cacasink->bpp,
251 cacasink->width * cacasink->bpp / 8,
252 cacasink->red_mask, cacasink->green_mask, cacasink->blue_mask, 0);
254 if (!cacasink->bitmap) {
262 gst_cacasink_init (GstCACASink * cacasink)
264 cacasink->screen_width = GST_CACA_DEFAULT_SCREEN_WIDTH;
265 cacasink->screen_height = GST_CACA_DEFAULT_SCREEN_HEIGHT;
266 cacasink->bpp = GST_CACA_DEFAULT_BPP;
267 cacasink->red_mask = GST_CACA_DEFAULT_RED_MASK;
268 cacasink->green_mask = GST_CACA_DEFAULT_GREEN_MASK;
269 cacasink->blue_mask = GST_CACA_DEFAULT_BLUE_MASK;
273 gst_cacasink_render (GstBaseSink * basesink, GstBuffer * buffer)
275 GstCACASink *cacasink = GST_CACASINK (basesink);
277 GST_DEBUG ("render");
280 caca_draw_bitmap (0, 0, cacasink->screen_width - 1,
281 cacasink->screen_height - 1, cacasink->bitmap, GST_BUFFER_DATA (buffer));
288 gst_cacasink_set_property (GObject * object, guint prop_id,
289 const GValue * value, GParamSpec * pspec)
291 GstCACASink *cacasink;
293 g_return_if_fail (GST_IS_CACASINK (object));
295 cacasink = GST_CACASINK (object);
299 cacasink->dither = g_value_get_enum (value);
300 caca_set_dithering (cacasink->dither + CACA_DITHERING_NONE);
303 case ARG_ANTIALIASING:{
304 cacasink->antialiasing = g_value_get_boolean (value);
305 if (cacasink->antialiasing) {
306 caca_set_feature (CACA_ANTIALIASING_MAX);
308 caca_set_feature (CACA_ANTIALIASING_MIN);
318 gst_cacasink_get_property (GObject * object, guint prop_id, GValue * value,
321 GstCACASink *cacasink;
323 cacasink = GST_CACASINK (object);
326 case ARG_SCREEN_WIDTH:{
327 g_value_set_int (value, cacasink->screen_width);
330 case ARG_SCREEN_HEIGHT:{
331 g_value_set_int (value, cacasink->screen_height);
335 g_value_set_enum (value, cacasink->dither);
338 case ARG_ANTIALIASING:{
339 g_value_set_boolean (value, cacasink->antialiasing);
343 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
350 gst_cacasink_open (GstCACASink * cacasink)
352 cacasink->bitmap = NULL;
355 cacasink->screen_width = caca_get_width ();
356 cacasink->screen_height = caca_get_height ();
357 cacasink->antialiasing = TRUE;
358 caca_set_feature (CACA_ANTIALIASING_MAX);
359 cacasink->dither = 0;
360 caca_set_dithering (CACA_DITHERING_NONE);
366 gst_cacasink_close (GstCACASink * cacasink)
368 if (cacasink->bitmap) {
369 caca_free_bitmap (cacasink->bitmap);
370 cacasink->bitmap = NULL;
375 static GstStateChangeReturn
376 gst_cacasink_change_state (GstElement * element, GstStateChange transition)
378 GstStateChangeReturn ret;
380 switch (transition) {
381 case GST_STATE_CHANGE_READY_TO_PAUSED:
382 if (!gst_cacasink_open (GST_CACASINK (element)))
383 return GST_STATE_CHANGE_FAILURE;
389 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
391 switch (transition) {
392 case GST_STATE_CHANGE_PAUSED_TO_READY:
393 gst_cacasink_close (GST_CACASINK (element));
402 plugin_init (GstPlugin * plugin)
404 if (!gst_element_register (plugin, "cacasink", GST_RANK_NONE,
411 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
414 "Colored ASCII Art video sink",
415 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)