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., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, 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-1.0 filesrc location=test.avi ! decodebin ! videoconvert ! 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-1.0 filesrc location=test.avi ! decodebin ! videoconvert ! cacasink
33 * ]| This pipeline renders a video to ascii art into the current terminal.
44 #include "gstcacasink.h"
47 //#define GST_CACA_DEFAULT_RED_MASK R_MASK_32_REVERSE_INT
48 //#define GST_CACA_DEFAULT_GREEN_MASK G_MASK_32_REVERSE_INT
49 //#define GST_CACA_DEFAULT_BLUE_MASK B_MASK_32_REVERSE_INT
51 /* cacasink signals and args */
57 #define GST_CACA_DEFAULT_SCREEN_WIDTH 80
58 #define GST_CACA_DEFAULT_SCREEN_HEIGHT 25
59 #define GST_CACA_DEFAULT_DITHER CACA_DITHERING_NONE
60 #define GST_CACA_DEFAULT_ANTIALIASING TRUE
71 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
74 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE
75 ("{ RGB, BGR, RGBx, xRGB, BGRx, xBGR, RGB16, RGB15 }"))
78 static gboolean gst_cacasink_setcaps (GstBaseSink * pad, GstCaps * caps);
79 static void gst_cacasink_get_times (GstBaseSink * sink, GstBuffer * buffer,
80 GstClockTime * start, GstClockTime * end);
81 static GstFlowReturn gst_cacasink_render (GstBaseSink * basesink,
84 static void gst_cacasink_set_property (GObject * object, guint prop_id,
85 const GValue * value, GParamSpec * pspec);
86 static void gst_cacasink_get_property (GObject * object, guint prop_id,
87 GValue * value, GParamSpec * pspec);
89 static GstStateChangeReturn gst_cacasink_change_state (GstElement * element,
90 GstStateChange transition);
92 #define gst_cacasink_parent_class parent_class
93 G_DEFINE_TYPE (GstCACASink, gst_cacasink, GST_TYPE_BASE_SINK);
95 #define GST_TYPE_CACADITHER (gst_cacasink_dither_get_type())
97 gst_cacasink_dither_get_type (void)
99 static GType dither_type = 0;
101 static const GEnumValue dither_types[] = {
102 {CACA_DITHERING_NONE, "No dithering", "none"},
103 {CACA_DITHERING_ORDERED2, "Ordered 2x2 Bayer dithering", "2x2"},
104 {CACA_DITHERING_ORDERED4, "Ordered 4x4 Bayer dithering", "4x4"},
105 {CACA_DITHERING_ORDERED8, "Ordered 8x8 Bayer dithering", "8x8"},
106 {CACA_DITHERING_RANDOM, "Random dithering", "random"},
111 dither_type = g_enum_register_static ("GstCACASinkDithering", dither_types);
117 gst_cacasink_class_init (GstCACASinkClass * klass)
119 GObjectClass *gobject_class;
120 GstElementClass *gstelement_class;
121 GstBaseSinkClass *gstbasesink_class;
123 gobject_class = (GObjectClass *) klass;
124 gstelement_class = (GstElementClass *) klass;
125 gstbasesink_class = (GstBaseSinkClass *) klass;
127 parent_class = g_type_class_peek_parent (klass);
129 gobject_class->set_property = gst_cacasink_set_property;
130 gobject_class->get_property = gst_cacasink_get_property;
132 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SCREEN_WIDTH,
133 g_param_spec_int ("screen-width", "Screen Width",
134 "The width of the screen", 0, G_MAXINT, GST_CACA_DEFAULT_SCREEN_WIDTH,
135 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
136 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SCREEN_HEIGHT,
137 g_param_spec_int ("screen-height", "Screen Height",
138 "The height of the screen", 0, G_MAXINT,
139 GST_CACA_DEFAULT_SCREEN_HEIGHT,
140 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
141 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DITHER,
142 g_param_spec_enum ("dither", "Dither Type", "Set type of Dither",
143 GST_TYPE_CACADITHER, GST_CACA_DEFAULT_DITHER,
144 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
145 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ANTIALIASING,
146 g_param_spec_boolean ("anti-aliasing", "Anti Aliasing",
147 "Enables Anti-Aliasing", GST_CACA_DEFAULT_ANTIALIASING,
148 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
150 gstelement_class->change_state = gst_cacasink_change_state;
152 gst_element_class_set_static_metadata (gstelement_class,
153 "A colored ASCII art video sink", "Sink/Video",
154 "A colored ASCII art videosink", "Zeeshan Ali <zak147@yahoo.com>");
155 gst_element_class_add_pad_template (gstelement_class,
156 gst_static_pad_template_get (&sink_template));
158 gstbasesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_cacasink_setcaps);
159 gstbasesink_class->get_times = GST_DEBUG_FUNCPTR (gst_cacasink_get_times);
160 gstbasesink_class->preroll = GST_DEBUG_FUNCPTR (gst_cacasink_render);
161 gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_cacasink_render);
165 gst_cacasink_get_times (GstBaseSink * sink, GstBuffer * buffer,
166 GstClockTime * start, GstClockTime * end)
168 *start = GST_BUFFER_TIMESTAMP (buffer);
169 *end = *start + GST_BUFFER_DURATION (buffer);
173 gst_cacasink_setcaps (GstBaseSink * basesink, GstCaps * caps)
175 GstCACASink *cacasink;
177 guint bpp, red_mask, green_mask, blue_mask;
179 cacasink = GST_CACASINK (basesink);
181 if (!gst_video_info_from_caps (&info, caps))
184 switch (GST_VIDEO_INFO_FORMAT (&info)) {
185 case GST_VIDEO_FORMAT_RGB:
186 case GST_VIDEO_FORMAT_BGR:
187 case GST_VIDEO_FORMAT_RGBx:
188 case GST_VIDEO_FORMAT_xRGB:
189 case GST_VIDEO_FORMAT_BGRx:
190 case GST_VIDEO_FORMAT_xBGR:
191 bpp = 8 * info.finfo->pixel_stride[0];
192 red_mask = 0xff << (8 * info.finfo->poffset[GST_VIDEO_COMP_R]);
193 green_mask = 0xff << (8 * info.finfo->poffset[GST_VIDEO_COMP_G]);
194 blue_mask = 0xff << (8 * info.finfo->poffset[GST_VIDEO_COMP_B]);
196 case GST_VIDEO_FORMAT_RGB16:
202 case GST_VIDEO_FORMAT_RGB15:
212 if (cacasink->bitmap) {
213 caca_free_bitmap (cacasink->bitmap);
215 cacasink->bitmap = caca_create_bitmap (bpp,
216 GST_VIDEO_INFO_WIDTH (&info),
217 GST_VIDEO_INFO_HEIGHT (&info),
218 GST_ROUND_UP_4 (GST_VIDEO_INFO_WIDTH (&info) * bpp / 8),
219 red_mask, green_mask, blue_mask, 0);
220 if (!cacasink->bitmap)
223 cacasink->info = info;
230 GST_ERROR_OBJECT (cacasink, "error parsing caps");
235 GST_ERROR_OBJECT (cacasink, "invalid format");
240 GST_ERROR_OBJECT (cacasink, "could not create bitmap");
246 gst_cacasink_init (GstCACASink * cacasink)
248 cacasink->screen_width = GST_CACA_DEFAULT_SCREEN_WIDTH;
249 cacasink->screen_height = GST_CACA_DEFAULT_SCREEN_HEIGHT;
251 cacasink->dither = GST_CACA_DEFAULT_DITHER;
252 cacasink->antialiasing = GST_CACA_DEFAULT_ANTIALIASING;
256 gst_cacasink_render (GstBaseSink * basesink, GstBuffer * buffer)
258 GstCACASink *cacasink = GST_CACASINK (basesink);
261 GST_DEBUG ("render");
263 if (!gst_video_frame_map (&frame, &cacasink->info, buffer, GST_MAP_READ))
267 caca_draw_bitmap (0, 0, cacasink->screen_width - 1,
268 cacasink->screen_height - 1, cacasink->bitmap,
269 GST_VIDEO_FRAME_PLANE_DATA (&frame, 0));
272 gst_video_frame_unmap (&frame);
279 GST_ERROR_OBJECT (cacasink, "invalid frame received");
280 return GST_FLOW_ERROR;
285 gst_cacasink_set_property (GObject * object, guint prop_id,
286 const GValue * value, GParamSpec * pspec)
288 GstCACASink *cacasink;
290 g_return_if_fail (GST_IS_CACASINK (object));
292 cacasink = GST_CACASINK (object);
296 cacasink->dither = g_value_get_enum (value);
297 caca_set_dithering (cacasink->dither + CACA_DITHERING_NONE);
300 case PROP_ANTIALIASING:{
301 cacasink->antialiasing = g_value_get_boolean (value);
302 if (cacasink->antialiasing) {
303 caca_set_feature (CACA_ANTIALIASING_MAX);
305 caca_set_feature (CACA_ANTIALIASING_MIN);
315 gst_cacasink_get_property (GObject * object, guint prop_id, GValue * value,
318 GstCACASink *cacasink;
320 cacasink = GST_CACASINK (object);
323 case PROP_SCREEN_WIDTH:{
324 g_value_set_int (value, cacasink->screen_width);
327 case PROP_SCREEN_HEIGHT:{
328 g_value_set_int (value, cacasink->screen_height);
332 g_value_set_enum (value, cacasink->dither);
335 case PROP_ANTIALIASING:{
336 g_value_set_boolean (value, cacasink->antialiasing);
340 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
347 gst_cacasink_open (GstCACASink * cacasink)
349 cacasink->bitmap = NULL;
351 if (caca_init () < 0)
354 cacasink->screen_width = caca_get_width ();
355 cacasink->screen_height = caca_get_height ();
356 cacasink->antialiasing = TRUE;
357 caca_set_feature (CACA_ANTIALIASING_MAX);
358 cacasink->dither = 0;
359 caca_set_dithering (CACA_DITHERING_NONE);
366 GST_ELEMENT_ERROR (cacasink, RESOURCE, OPEN_WRITE, (NULL),
367 ("caca_init() failed"));
373 gst_cacasink_close (GstCACASink * cacasink)
375 if (cacasink->bitmap) {
376 caca_free_bitmap (cacasink->bitmap);
377 cacasink->bitmap = NULL;
382 static GstStateChangeReturn
383 gst_cacasink_change_state (GstElement * element, GstStateChange transition)
385 GstStateChangeReturn ret;
387 switch (transition) {
388 case GST_STATE_CHANGE_READY_TO_PAUSED:
389 if (!gst_cacasink_open (GST_CACASINK (element)))
390 return GST_STATE_CHANGE_FAILURE;
396 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
398 switch (transition) {
399 case GST_STATE_CHANGE_PAUSED_TO_READY:
400 gst_cacasink_close (GST_CACASINK (element));
409 plugin_init (GstPlugin * plugin)
411 if (!gst_element_register (plugin, "cacasink", GST_RANK_NONE,
418 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
421 "Colored ASCII Art video sink",
422 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)