1 /* GStreamer
2 * Copyright (C) 2014 Tim-Philipp Müller <tim centricular com>
3 * Copyright (C) 2018 Sebastian Dröge <sebastian@centricular.com>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20 #ifdef HAVE_CONFIG_H
21 #include "config.h"
22 #endif
23
24 #include <gst/gst.h>
25 #include <gst/video/video.h>
26
27 #include <math.h>
28
29 #include <gio/gio.h>
30
31 #define VIDEO_WIDTH 720
32 #define VIDEO_HEIGHT 480
33 #define VIDEO_FPS 50
34
35 /* GdkPixbuf RGBA C-Source image dump from gdk-pixbuf-csource --raw,
36 * gzipped and then base64 encoded */
37 const gchar gzipped_pixdata_base64[] =
38 "H4sICPX/Z1QAA2xvZ28ucGl4AO2dsZHrNhCG+ewK2II64ClyrhmnTtSBh4kLUOLQAUuwEhSgFtiA"
39 "A7agwA2wBT5AXJ5w4P5LgKLEO97ezDf2SCAIAftjFwuQ7/c///ojy/77+8eP7Jcs+/WfLMv+t/zW"
40 "dV32pSmK3HK6sXZbFOXV9PZfWipLbWksHdHQZxVpZP+Ee7u62/d7rt0fivIqimJnOX+w/zhauq68"
41 "aWjevfdUR1h3vXq/KMqzufueFN1J1FE+stf8KfCzobZ3q/ePojyT3v8gDSyB09GFND7g/N014rpl"
42 "41xF+Wz0/i817nwFjepP+Rb0PnDwOUOehePyQq1eurlrSkXZOkVx7OblbGK43upf+zcqyldhOT22"
43 "5GvV9ynKXIriQDpKye242Ldcve2KskX6deaRWVeebnpdu32Koryc4t/iaKksmm9Vvg3W3neWk+Vs"
44 "qS2tpSOu9NmZtLG4f7R15paS7jXct1q7XxTl2ZDd157dp1A/6q9I+1Wg+QH1g8pmcb7M0szUHseV"
45 "/KTTtJg39XyudH/NASmbhfzOUtqTNHmhew1cglhT9ad8O16kv7m4eFT3/pVNQ77IX8shLgW/RnsW"
46 "Li7V5y4UJaDo9wnOT9Sjq1fzn4oSQXHft4tZ00Vpr5jI3yiKwmO1sy/63GZKzNpS+dVyLsaYneVk"
47 "Ud+rbIqi32M/kC7DtaXzn6vt9Vm95ZbS0lg64rx2nynKdyHQ3oC+A06ZxdtbkztWundpqS1fKo5j"
48 "9OfQ8+jKJNbW987eye47QGO5WE6u/BPakJP2rt4927X7JhanNaBBzQUpEMbmU2hJk66O2ftt7lrS"
49 "f8vc4yl+0P7llspyWapOl3th9Hdde4yVz4m17eMD2pP8ZBXjI0l3J7oG1Rf1DlH7dyBOpKuB2+dB"
50 "2ZzKXS3ugw9+lnKZB49oH2bL1owGH9K4vX5P7Yg+0+O1/Uj/XSRm8ep9Ws6LclrRfe+N1+xYIxjz"
51 "49Jrh6D+m68inSypPeQja7pXRZp3/z1P6M7XM+xX+7eznElHc3E63Hv2xWmoo89H4yLEnpDg+orq"
52 "DsnJFq7oWqYtLhd7sbTg3i3dL2VO2Xlt5Oo7DzY1Uc8VtOng9eMZtP0ctpnmJa787Tcm/jbUtmHc"
53 "xfmG+p0bwz0R9t1hYr33WTgj/ZEfe1R7HfnJ3NNCjIbKoP8f1SBn2w2Nq3htYI9o7uBopnRI9nmO"
54 "rM/ZveijhWulee+DFrx2xZSHe0Gmn99ix5sd96A+1E97w88pB8bX1ABubfYK4DxG+msYPbWWksqU"
55 "gu5a0u/O68PQ3t99hWF8kW9vC2gQaWTyWtD2sB5UVzOhGeRLJR2y/pB0k9RHgCqxXaP2kP5Qn9TU"
56 "n+He7rumwO/j5oSr0FanQZf/jIp33+650qXXjSj2FP2+y58AbYVrPs5PjuyOxsTvq5H+yYb8Mofg"
57 "u8rgmKb2vq/C+lPtMLj2KOjBbyPSqTS3N9T2Y/D5SbAtdt1r4uapoZ9ife+VroHzlQn2ZCf0dw7K"
58 "7rk2Cn2VMo6z15pP1KPzt5N72LT+4/Q36hv7d+R8INN/oR2zdunZEcyvANuEPj3SNlkNmvHcIY6x"
59 "4eeHWbkiSfugvBT3jeLYifKdCdaHggbC+Q7Vi+YOriznW5PG8BENAj3G5FYQTsslWvcxuqqABke6"
60 "oXzoqGyEfcC1kunnXRRvcfOm2N9mOo4szX1df/DnB4P9BbsOMmANNXf8F9TgaB1p5LlppBehfr+/"
61 "0PiwuhJ+Y+hbpXpbGsNbLtTcc66LPzP31u+rDznPesJPDnnS5Ny2oMGRnSdoEOVERjpE2qTvTmAc"
62 "pGuQ7Yg5EyP7QDY3gjQozREzNIhiNXTv1Ni1BeOCyvvxOJqzUJtzUD6MWaX1wKd4P9HbgmfdhFwL"
63 "p0FOr9x6EOngmtKHpt8TGNUxcQ2yTXGeNLL/lHz4Qxo09/0tNN8gH4zainIcyK7ZuF7Q4D6iDal1"
64 "1kE5ZD+bfD+DsB48BuXy7L7//mEvgulrKWd3iyUi7ZPzS+J6C1wz+XyFkfMWB0D02tHrl2FfMDYX"
65 "yfUvitXg2QvBrlHMyM4JEW3oqC+5/orymwbEUWtr5ck65PKidVCGy4leh71AZgwlv9JN6VDQsZSP"
66 "QddM+iUw7nM5BHWn7jWKbRf6VsrJcjEFtGug2dr7HvntOYQa5OanTT8jY//2tMcXauxCuVBOo+9n"
67 "YYRxnNIhvN7g2AnGI+iamD4w6bnwqN810QctaUM6V8LlDJFPk9a7qfllzmdVEW2Yg18vmkc/xTrw"
68 "yTqU9uDD/fgK+b9EHcK1nTDGcF0Hrok6Gyu00c33KBZlifztYY6fPbcG2poUqwl2LeWXuXv4OVEp"
69 "95XUX/6Yoj5bWx8v0F8OfN3g72rS3TFWewk6RHuHXOwkjoXhfVnsOcdFc5xUJ/Jto7gKlEX5xUlN"
70 "x/T/RNvFvhA0GDXnCfedPY9+ZUhjvu4Wfy5P0CHKoXGaEMci1TYj7sfqJbI+uBfwSNuFelPPXkp+"
71 "k823BGXQWuGh3AmYRzf9zpKMOfvyYB8uEiuC8ZXO00zuZ020G83rs8Y/xU8gmwcaRPVKa+uk/LLh"
72 "8y1NUEbKfc+aww3eP/xS73xIBez5XbKPzwuW3H4h6Ec3j6E9ba6PkR9MGgvBNmPbLeXa58TfKRqM"
73 "brtJPJuTom/vGm4dwJ2lQXmsWe/cM4l7mFtBOCcjPR+B9iMGW4LnGWLHa4bdzNqbj6wj2QYEXYX+"
74 "JPWMKlcOvpdEaIcUu0blUA1eX7Bnbx7os02/N4iLRSMY7QuacWwSc24YjhXQgxQ/sT4s0QbQs2kO"
75 "dl1o+hiYs09p/8x/7kPaqw/3GZGfkPbmka9C5wiQ30RzJdp3R2cTh3MKozk6ta1bgfYGUzU42sMX"
76 "xsP1q4ttuLxfci7Ps18/RwfPI6f2x4QOG087/m8arRlN2vN9yP+G5yiTcpETbUBxCpo7kGZzof3D"
77 "OwGG56ca7/NwDkdrwc1qUNiXT4Hrx9hn1WLOj0n7wDF7Vcka9Gw39lyL9Gz51P78ebAv1G9BfWiv"
78 "A2kQ+mKhzbP2aEz8s8DsmWGDfbxjc/+OENDfib4b3uNUejmZqGd8g/5EY3k1CWt2cz9nONR380XM"
79 "+HPvHlnivU/ce19aA96FA/TsP2984q6jcpeg/f75kTyoxwfFiSW6ZkJLHDHvt8np93Hv3xliCLT2"
80 "OIEx3OTeILMf2EztCYKYNcYG2fMQivKdYbQUpY1s/M6ZTcbpivJMMv5Zpdhn7mdpV1GUO1l/NjTU"
81 "Usx7Z8Iz3ZuM0xXlFWT8s4CsDkmzJZPD0ThUUWaSye8THZ6RqOj/uf2L1f79T0XZCpn8vJJ0Pkb9"
82 "n6IsCOVoBp/HvS+moe83+T4dRVEUZRmyn2F9swl9yAAA";
83
84 static GstBuffer *logo_buf;
85
86 static GMainLoop *main_loop;
87 static gint count;
88
89 static GstBuffer *
create_overlay_buffer(void)90 create_overlay_buffer (void)
91 {
92 GZlibDecompressor *decompress;
93 GConverterResult decomp_res;
94 guchar *gzipped_pixdata, *pixdata;
95 gsize gzipped_size, bytes_read, pixdata_size;
96 GstBuffer *logo_pixels;
97 guint w, h, stride;
98
99 gzipped_pixdata = g_base64_decode (gzipped_pixdata_base64, &gzipped_size);
100 g_assert (gzipped_pixdata != NULL);
101
102 pixdata = g_malloc (64 * 1024);
103
104 decompress = g_zlib_decompressor_new (G_ZLIB_COMPRESSOR_FORMAT_GZIP);
105 decomp_res = g_converter_convert (G_CONVERTER (decompress),
106 gzipped_pixdata, gzipped_size, pixdata, 64 * 1024,
107 G_CONVERTER_INPUT_AT_END, &bytes_read, &pixdata_size, NULL);
108 g_assert (decomp_res == G_CONVERTER_FINISHED);
109 g_assert (bytes_read == gzipped_size);
110 g_free (gzipped_pixdata);
111 g_object_unref (decompress);
112
113 /* 0: Pixbuf magic (0x47646b50) */
114 g_assert (GST_READ_UINT32_BE (pixdata) == 0x47646b50);
115
116 /* 4: length incl. header */
117 /* 8: pixdata_type */
118 /* 12: rowstride (900) */
119 stride = GST_READ_UINT32_BE (pixdata + 12);
120 /* 16: width (225) */
121 w = GST_READ_UINT32_BE (pixdata + 16);
122 /* 20: height (57) */
123 h = GST_READ_UINT32_BE (pixdata + 20);
124 /* 24: pixel_data */
125 GST_LOG ("%dx%d @ %d", w, h, stride);
126 /* we assume that the last line also has padding at the end */
127 g_assert (pixdata_size - 24 >= h * stride);
128
129 logo_pixels = gst_buffer_new_and_alloc (h * stride);
130 gst_buffer_fill (logo_pixels, 0, pixdata + 24, h * stride);
131 gst_buffer_add_video_meta (logo_pixels, GST_VIDEO_FRAME_FLAG_NONE,
132 GST_VIDEO_OVERLAY_COMPOSITION_FORMAT_RGB, w, h);
133
134 g_free (pixdata);
135
136 return logo_pixels;
137 }
138
139 static gboolean
message_cb(GstBus * bus,GstMessage * message,gpointer user_data)140 message_cb (GstBus * bus, GstMessage * message, gpointer user_data)
141 {
142 switch (GST_MESSAGE_TYPE (message)) {
143 case GST_MESSAGE_ERROR:{
144 GError *err = NULL;
145 gchar *name, *debug = NULL;
146
147 name = gst_object_get_path_string (message->src);
148 gst_message_parse_error (message, &err, &debug);
149
150 g_printerr ("ERROR: from element %s: %s\n", name, err->message);
151 if (debug != NULL)
152 g_printerr ("Additional debug info:\n%s\n", debug);
153
154 g_error_free (err);
155 g_free (debug);
156 g_free (name);
157
158 g_main_loop_quit (main_loop);
159 break;
160 }
161 case GST_MESSAGE_WARNING:{
162 GError *err = NULL;
163 gchar *name, *debug = NULL;
164
165 name = gst_object_get_path_string (message->src);
166 gst_message_parse_warning (message, &err, &debug);
167
168 g_printerr ("ERROR: from element %s: %s\n", name, err->message);
169 if (debug != NULL)
170 g_printerr ("Additional debug info:\n%s\n", debug);
171
172 g_error_free (err);
173 g_free (debug);
174 g_free (name);
175 break;
176 }
177 case GST_MESSAGE_EOS:
178 g_print ("Got EOS\n");
179 g_main_loop_quit (main_loop);
180 break;
181 default:
182 break;
183 }
184
185 return TRUE;
186 }
187
188 typedef struct
189 {
190 gboolean valid;
191 GstVideoInfo info;
192 } OverlayState;
193
194 static void
prepare_overlay(GstElement * overlay,GstCaps * caps,gint window_width,gint window_height,gpointer user_data)195 prepare_overlay (GstElement * overlay, GstCaps * caps, gint window_width,
196 gint window_height, gpointer user_data)
197 {
198 OverlayState *s = (OverlayState *) user_data;
199
200 if (gst_video_info_from_caps (&s->info, caps))
201 s->valid = TRUE;
202 else
203 s->valid = FALSE;
204 }
205
206 #define SPEED_SCALE_FACTOR (VIDEO_FPS * 4)
207
208 /* nicked from videotestsrc's ball pattern renderer */
209 static void
calculate_position(gint * x,gint * y,guint logo_w,guint logo_h,guint n)210 calculate_position (gint * x, gint * y, guint logo_w, guint logo_h, guint n)
211 {
212 guint r_x = logo_w / 2;
213 guint r_y = logo_h / 2;
214 guint w = VIDEO_WIDTH + logo_w;
215 guint h = VIDEO_HEIGHT + logo_h;
216
217 *x = r_x + (0.5 + 0.5 * sin (2 * G_PI * n / SPEED_SCALE_FACTOR))
218 * (w - 2 * r_x);
219 *y = r_y + (0.5 + 0.5 * sin (2 * G_PI * sqrt (2) * n / SPEED_SCALE_FACTOR))
220 * (h - 2 * r_y);
221
222 *x -= logo_w;
223 *y -= logo_h;
224 }
225
226 static GstVideoOverlayComposition *
draw_overlay(GstElement * overlay,GstSample * sample,gpointer user_data)227 draw_overlay (GstElement * overlay, GstSample * sample, gpointer user_data)
228 {
229 OverlayState *s = (OverlayState *) user_data;
230 GstVideoOverlayRectangle *rect;
231 GstVideoOverlayComposition *comp;
232 GstVideoMeta *vmeta;
233 gint x, y;
234
235 if (!s->valid)
236 return NULL;
237
238 vmeta = gst_buffer_get_video_meta (logo_buf);
239 calculate_position (&x, &y, vmeta->width, vmeta->height, ++count);
240
241 rect = gst_video_overlay_rectangle_new_raw (logo_buf, x, y,
242 vmeta->width, vmeta->height, GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE);
243 comp = gst_video_overlay_composition_new (rect);
244 gst_video_overlay_rectangle_unref (rect);
245
246 return comp;
247 }
248
249 int
main(int argc,char ** argv)250 main (int argc, char **argv)
251 {
252 GstElement *pipeline;
253 GstElement *src, *capsfilter, *overlay, *conv, *sink;
254 GstBus *bus;
255 GstCaps *filter_caps;
256 OverlayState overlay_state = { 0, };
257
258 gst_init (&argc, &argv);
259
260 pipeline = gst_pipeline_new (NULL);
261 src = gst_element_factory_make ("videotestsrc", NULL);
262 capsfilter = gst_element_factory_make ("capsfilter", NULL);
263 overlay = gst_element_factory_make ("overlaycomposition", NULL);
264 conv = gst_element_factory_make ("videoconvert", NULL);
265 sink = gst_element_factory_make ("autovideosink", NULL);
266
267 if (!pipeline || !src || !capsfilter || !overlay || !conv || !sink) {
268 g_error ("Failed to create elements");
269 return -1;
270 }
271
272 gst_bin_add_many (GST_BIN (pipeline), src, capsfilter, overlay, conv, sink,
273 NULL);
274 if (!gst_element_link_many (src, capsfilter, overlay, conv, sink, NULL)) {
275 g_error ("Failed to link elements");
276 return -2;
277 }
278
279 filter_caps = gst_caps_from_string ("video/x-raw, format = "
280 GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS);
281 gst_caps_set_simple (filter_caps,
282 "width", G_TYPE_INT, VIDEO_WIDTH,
283 "height", G_TYPE_INT, VIDEO_HEIGHT,
284 "framerate", GST_TYPE_FRACTION, VIDEO_FPS, 1, NULL);
285 g_object_set (capsfilter, "caps", filter_caps, NULL);
286 gst_caps_unref (filter_caps);
287
288 g_signal_connect (overlay, "draw", G_CALLBACK (draw_overlay), &overlay_state);
289 g_signal_connect (overlay, "caps-changed",
290 G_CALLBACK (prepare_overlay), &overlay_state);
291
292 count = 0;
293 logo_buf = create_overlay_buffer ();
294
295 main_loop = g_main_loop_new (NULL, FALSE);
296
297 bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
298 gst_bus_add_signal_watch (bus);
299 g_signal_connect (G_OBJECT (bus), "message", G_CALLBACK (message_cb), NULL);
300 gst_object_unref (GST_OBJECT (bus));
301
302 if (gst_element_set_state (pipeline,
303 GST_STATE_PLAYING) == GST_STATE_CHANGE_FAILURE) {
304 g_error ("Failed to go into PLAYING state");
305 return -3;
306 }
307
308 g_main_loop_run (main_loop);
309
310 gst_element_set_state (pipeline, GST_STATE_NULL);
311
312 g_main_loop_unref (main_loop);
313 gst_object_unref (pipeline);
314
315 return 0;
316 }
317