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 /* cacasink signals and args */
73 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
76 GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB ";" GST_VIDEO_CAPS_RGBx ";"
77 GST_VIDEO_CAPS_RGB_16 ";" GST_VIDEO_CAPS_RGB_15)
80 static void gst_cacasink_base_init (gpointer g_class);
81 static void gst_cacasink_class_init (GstCACASinkClass * klass);
82 static void gst_cacasink_init (GstCACASink * cacasink);
84 static gboolean gst_cacasink_setcaps (GstBaseSink * pad, GstCaps * caps);
85 static void gst_cacasink_get_times (GstBaseSink * sink, GstBuffer * buffer,
86 GstClockTime * start, GstClockTime * end);
87 static GstFlowReturn gst_cacasink_render (GstBaseSink * basesink,
90 static void gst_cacasink_set_property (GObject * object, guint prop_id,
91 const GValue * value, GParamSpec * pspec);
92 static void gst_cacasink_get_property (GObject * object, guint prop_id,
93 GValue * value, GParamSpec * pspec);
95 static GstStateChangeReturn gst_cacasink_change_state (GstElement * element,
96 GstStateChange transition);
98 static GstElementClass *parent_class = NULL;
101 gst_cacasink_get_type (void)
103 static GType cacasink_type = 0;
105 if (!cacasink_type) {
106 static const GTypeInfo cacasink_info = {
107 sizeof (GstCACASinkClass),
108 gst_cacasink_base_init,
110 (GClassInitFunc) gst_cacasink_class_init,
113 sizeof (GstCACASink),
115 (GInstanceInitFunc) gst_cacasink_init,
119 g_type_register_static (GST_TYPE_BASE_SINK, "GstCACASink",
122 return cacasink_type;
125 #define GST_TYPE_CACADITHER (gst_cacasink_dither_get_type())
127 gst_cacasink_dither_get_type (void)
129 static GType dither_type = 0;
131 static const GEnumValue dither_types[] = {
132 {CACA_DITHERING_NONE, "No dithering", "none"},
133 {CACA_DITHERING_ORDERED2, "Ordered 2x2 Bayer dithering", "2x2"},
134 {CACA_DITHERING_ORDERED4, "Ordered 4x4 Bayer dithering", "4x4"},
135 {CACA_DITHERING_ORDERED8, "Ordered 8x8 Bayer dithering", "8x8"},
136 {CACA_DITHERING_RANDOM, "Random dithering", "random"},
141 dither_type = g_enum_register_static ("GstCACASinkDithering", dither_types);
147 gst_cacasink_base_init (gpointer g_class)
149 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
151 gst_element_class_set_details_simple (element_class,
152 "A colored ASCII art video sink", "Sink/Video",
153 "A colored ASCII art videosink", "Zeeshan Ali <zak147@yahoo.com>");
154 gst_element_class_add_static_pad_template (element_class,
159 gst_cacasink_class_init (GstCACASinkClass * klass)
161 GObjectClass *gobject_class;
162 GstElementClass *gstelement_class;
163 GstBaseSinkClass *gstbasesink_class;
165 gobject_class = (GObjectClass *) klass;
166 gstelement_class = (GstElementClass *) klass;
167 gstbasesink_class = (GstBaseSinkClass *) klass;
169 parent_class = g_type_class_peek_parent (klass);
171 gobject_class->set_property = gst_cacasink_set_property;
172 gobject_class->get_property = gst_cacasink_get_property;
173 gstelement_class->change_state = gst_cacasink_change_state;
175 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SCREEN_WIDTH,
176 g_param_spec_int ("screen-width", "Screen Width",
177 "The width of the screen", 0, G_MAXINT, GST_CACA_DEFAULT_SCREEN_WIDTH,
178 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
179 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SCREEN_HEIGHT,
180 g_param_spec_int ("screen-height", "Screen Height",
181 "The height of the screen", 0, G_MAXINT,
182 GST_CACA_DEFAULT_SCREEN_HEIGHT,
183 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
184 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DITHER,
185 g_param_spec_enum ("dither", "Dither Type", "Set type of Dither",
186 GST_TYPE_CACADITHER, CACA_DITHERING_NONE,
187 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
188 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ANTIALIASING,
189 g_param_spec_boolean ("anti-aliasing", "Anti Aliasing",
190 "Enables Anti-Aliasing", TRUE,
191 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
193 gstbasesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_cacasink_setcaps);
194 gstbasesink_class->get_times = GST_DEBUG_FUNCPTR (gst_cacasink_get_times);
195 gstbasesink_class->preroll = GST_DEBUG_FUNCPTR (gst_cacasink_render);
196 gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_cacasink_render);
200 gst_cacasink_get_times (GstBaseSink * sink, GstBuffer * buffer,
201 GstClockTime * start, GstClockTime * end)
203 *start = GST_BUFFER_TIMESTAMP (buffer);
204 *end = *start + GST_BUFFER_DURATION (buffer);
208 gst_cacasink_setcaps (GstBaseSink * basesink, GstCaps * caps)
210 GstCACASink *cacasink;
211 GstStructure *structure;
214 cacasink = GST_CACASINK (basesink);
216 structure = gst_caps_get_structure (caps, 0);
217 gst_structure_get_int (structure, "width", &(cacasink->width));
218 gst_structure_get_int (structure, "height", &(cacasink->height));
219 gst_structure_get_int (structure, "endianness", &endianness);
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) {
239 if (endianness == G_BIG_ENDIAN) {
240 cacasink->red_mask = GUINT16_FROM_BE (cacasink->red_mask);
241 cacasink->green_mask = GUINT16_FROM_BE (cacasink->green_mask);
242 cacasink->blue_mask = GUINT16_FROM_BE (cacasink->blue_mask);
244 cacasink->red_mask = GUINT16_FROM_LE (cacasink->red_mask);
245 cacasink->green_mask = GUINT16_FROM_LE (cacasink->green_mask);
246 cacasink->blue_mask = GUINT16_FROM_LE (cacasink->blue_mask);
250 if (cacasink->bitmap) {
251 caca_free_bitmap (cacasink->bitmap);
254 cacasink->bitmap = caca_create_bitmap (cacasink->bpp,
257 GST_ROUND_UP_4 (cacasink->width * cacasink->bpp / 8),
258 cacasink->red_mask, cacasink->green_mask, cacasink->blue_mask, 0);
260 if (!cacasink->bitmap) {
268 gst_cacasink_init (GstCACASink * cacasink)
270 cacasink->screen_width = GST_CACA_DEFAULT_SCREEN_WIDTH;
271 cacasink->screen_height = GST_CACA_DEFAULT_SCREEN_HEIGHT;
272 cacasink->bpp = GST_CACA_DEFAULT_BPP;
273 cacasink->red_mask = GST_CACA_DEFAULT_RED_MASK;
274 cacasink->green_mask = GST_CACA_DEFAULT_GREEN_MASK;
275 cacasink->blue_mask = GST_CACA_DEFAULT_BLUE_MASK;
279 gst_cacasink_render (GstBaseSink * basesink, GstBuffer * buffer)
281 GstCACASink *cacasink = GST_CACASINK (basesink);
283 GST_DEBUG ("render");
286 caca_draw_bitmap (0, 0, cacasink->screen_width - 1,
287 cacasink->screen_height - 1, cacasink->bitmap, GST_BUFFER_DATA (buffer));
294 gst_cacasink_set_property (GObject * object, guint prop_id,
295 const GValue * value, GParamSpec * pspec)
297 GstCACASink *cacasink;
299 g_return_if_fail (GST_IS_CACASINK (object));
301 cacasink = GST_CACASINK (object);
305 cacasink->dither = g_value_get_enum (value);
306 caca_set_dithering (cacasink->dither + CACA_DITHERING_NONE);
309 case ARG_ANTIALIASING:{
310 cacasink->antialiasing = g_value_get_boolean (value);
311 if (cacasink->antialiasing) {
312 caca_set_feature (CACA_ANTIALIASING_MAX);
314 caca_set_feature (CACA_ANTIALIASING_MIN);
324 gst_cacasink_get_property (GObject * object, guint prop_id, GValue * value,
327 GstCACASink *cacasink;
329 cacasink = GST_CACASINK (object);
332 case ARG_SCREEN_WIDTH:{
333 g_value_set_int (value, cacasink->screen_width);
336 case ARG_SCREEN_HEIGHT:{
337 g_value_set_int (value, cacasink->screen_height);
341 g_value_set_enum (value, cacasink->dither);
344 case ARG_ANTIALIASING:{
345 g_value_set_boolean (value, cacasink->antialiasing);
349 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
356 gst_cacasink_open (GstCACASink * cacasink)
358 cacasink->bitmap = NULL;
360 if (caca_init () < 0) {
361 GST_ELEMENT_ERROR (cacasink, RESOURCE, OPEN_WRITE, (NULL),
362 ("caca_init() failed"));
366 cacasink->screen_width = caca_get_width ();
367 cacasink->screen_height = caca_get_height ();
368 cacasink->antialiasing = TRUE;
369 caca_set_feature (CACA_ANTIALIASING_MAX);
370 cacasink->dither = 0;
371 caca_set_dithering (CACA_DITHERING_NONE);
377 gst_cacasink_close (GstCACASink * cacasink)
379 if (cacasink->bitmap) {
380 caca_free_bitmap (cacasink->bitmap);
381 cacasink->bitmap = NULL;
386 static GstStateChangeReturn
387 gst_cacasink_change_state (GstElement * element, GstStateChange transition)
389 GstStateChangeReturn ret;
391 switch (transition) {
392 case GST_STATE_CHANGE_READY_TO_PAUSED:
393 if (!gst_cacasink_open (GST_CACASINK (element)))
394 return GST_STATE_CHANGE_FAILURE;
400 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
402 switch (transition) {
403 case GST_STATE_CHANGE_PAUSED_TO_READY:
404 gst_cacasink_close (GST_CACASINK (element));
413 plugin_init (GstPlugin * plugin)
415 if (!gst_element_register (plugin, "cacasink", GST_RANK_NONE,
422 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
425 "Colored ASCII Art video sink",
426 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)