mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-09 13:48:55 +00:00
317 lines
11 KiB
C
317 lines
11 KiB
C
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/* GStreamer
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* Copyright (C) 2014 Tim-Philipp Müller <tim centricular com>
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* Copyright (C) 2018 Sebastian Dröge <sebastian@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <math.h>
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#include <gio/gio.h>
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#define VIDEO_WIDTH 720
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#define VIDEO_HEIGHT 480
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#define VIDEO_FPS 50
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/* GdkPixbuf RGBA C-Source image dump from gdk-pixbuf-csource --raw,
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* gzipped and then base64 encoded */
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const gchar gzipped_pixdata_base64[] =
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"H4sICPX/Z1QAA2xvZ28ucGl4AO2dsZHrNhCG+ewK2II64ClyrhmnTtSBh4kLUOLQAUuwEhSgFtiA"
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"A7agwA2wBT5AXJ5w4P5LgKLEO97ezDf2SCAIAftjFwuQ7/c///ojy/77+8eP7Jcs+/WfLMv+t/zW"
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"dV32pSmK3HK6sXZbFOXV9PZfWipLbWksHdHQZxVpZP+Ee7u62/d7rt0fivIqimJnOX+w/zhauq68"
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"aWjevfdUR1h3vXq/KMqzufueFN1J1FE+stf8KfCzobZ3q/ePojyT3v8gDSyB09GFND7g/N014rpl"
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"41xF+Wz0/i817nwFjepP+Rb0PnDwOUOehePyQq1eurlrSkXZOkVx7OblbGK43upf+zcqyldhOT22"
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"5GvV9ynKXIriQDpKye242Ldcve2KskX6deaRWVeebnpdu32Koryc4t/iaKksmm9Vvg3W3neWk+Vs"
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"qS2tpSOu9NmZtLG4f7R15paS7jXct1q7XxTl2ZDd157dp1A/6q9I+1Wg+QH1g8pmcb7M0szUHseV"
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"/KTTtJg39XyudH/NASmbhfzOUtqTNHmhew1cglhT9ad8O16kv7m4eFT3/pVNQ77IX8shLgW/RnsW"
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"Li7V5y4UJaDo9wnOT9Sjq1fzn4oSQXHft4tZ00Vpr5jI3yiKwmO1sy/63GZKzNpS+dVyLsaYneVk"
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"Ud+rbIqi32M/kC7DtaXzn6vt9Vm95ZbS0lg64rx2nynKdyHQ3oC+A06ZxdtbkztWundpqS1fKo5j"
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"9OfQ8+jKJNbW987eye47QGO5WE6u/BPakJP2rt4927X7JhanNaBBzQUpEMbmU2hJk66O2ftt7lrS"
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"f8vc4yl+0P7llspyWapOl3th9Hdde4yVz4m17eMD2pP8ZBXjI0l3J7oG1Rf1DlH7dyBOpKuB2+dB"
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"2ZzKXS3ugw9+lnKZB49oH2bL1owGH9K4vX5P7Yg+0+O1/Uj/XSRm8ep9Ws6LclrRfe+N1+xYIxjz"
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"49Jrh6D+m68inSypPeQja7pXRZp3/z1P6M7XM+xX+7eznElHc3E63Hv2xWmoo89H4yLEnpDg+orq"
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"DsnJFq7oWqYtLhd7sbTg3i3dL2VO2Xlt5Oo7DzY1Uc8VtOng9eMZtP0ctpnmJa787Tcm/jbUtmHc"
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"xfmG+p0bwz0R9t1hYr33WTgj/ZEfe1R7HfnJ3NNCjIbKoP8f1SBn2w2Nq3htYI9o7uBopnRI9nmO"
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"rM/ZveijhWulee+DFrx2xZSHe0Gmn99ix5sd96A+1E97w88pB8bX1ABubfYK4DxG+msYPbWWksqU"
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"gu5a0u/O68PQ3t99hWF8kW9vC2gQaWTyWtD2sB5UVzOhGeRLJR2y/pB0k9RHgCqxXaP2kP5Qn9TU"
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"n+He7rumwO/j5oSr0FanQZf/jIp33+650qXXjSj2FP2+y58AbYVrPs5PjuyOxsTvq5H+yYb8Mofg"
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"u8rgmKb2vq/C+lPtMLj2KOjBbyPSqTS3N9T2Y/D5SbAtdt1r4uapoZ9ife+VroHzlQn2ZCf0dw7K"
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"7rk2Cn2VMo6z15pP1KPzt5N72LT+4/Q36hv7d+R8INN/oR2zdunZEcyvANuEPj3SNlkNmvHcIY6x"
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"4eeHWbkiSfugvBT3jeLYifKdCdaHggbC+Q7Vi+YOriznW5PG8BENAj3G5FYQTsslWvcxuqqABke6"
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"oXzoqGyEfcC1kunnXRRvcfOm2N9mOo4szX1df/DnB4P9BbsOMmANNXf8F9TgaB1p5LlppBehfr+/"
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"0PiwuhJ+Y+hbpXpbGsNbLtTcc66LPzP31u+rDznPesJPDnnS5Ny2oMGRnSdoEOVERjpE2qTvTmAc"
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"pGuQ7Yg5EyP7QDY3gjQozREzNIhiNXTv1Ni1BeOCyvvxOJqzUJtzUD6MWaX1wKd4P9HbgmfdhFwL"
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"p0FOr9x6EOngmtKHpt8TGNUxcQ2yTXGeNLL/lHz4Qxo09/0tNN8gH4zainIcyK7ZuF7Q4D6iDal1"
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"1kE5ZD+bfD+DsB48BuXy7L7//mEvgulrKWd3iyUi7ZPzS+J6C1wz+XyFkfMWB0D02tHrl2FfMDYX"
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"yfUvitXg2QvBrlHMyM4JEW3oqC+5/orymwbEUWtr5ck65PKidVCGy4leh71AZgwlv9JN6VDQsZSP"
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"QddM+iUw7nM5BHWn7jWKbRf6VsrJcjEFtGug2dr7HvntOYQa5OanTT8jY//2tMcXauxCuVBOo+9n"
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"YYRxnNIhvN7g2AnGI+iamD4w6bnwqN810QctaUM6V8LlDJFPk9a7qfllzmdVEW2Yg18vmkc/xTrw"
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"yTqU9uDD/fgK+b9EHcK1nTDGcF0Hrok6Gyu00c33KBZlifztYY6fPbcG2poUqwl2LeWXuXv4OVEp"
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"95XUX/6Yoj5bWx8v0F8OfN3g72rS3TFWewk6RHuHXOwkjoXhfVnsOcdFc5xUJ/Jto7gKlEX5xUlN"
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"x/T/RNvFvhA0GDXnCfedPY9+ZUhjvu4Wfy5P0CHKoXGaEMci1TYj7sfqJbI+uBfwSNuFelPPXkp+"
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"k823BGXQWuGh3AmYRzf9zpKMOfvyYB8uEiuC8ZXO00zuZ020G83rs8Y/xU8gmwcaRPVKa+uk/LLh"
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"8y1NUEbKfc+aww3eP/xS73xIBez5XbKPzwuW3H4h6Ec3j6E9ba6PkR9MGgvBNmPbLeXa58TfKRqM"
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"brtJPJuTom/vGm4dwJ2lQXmsWe/cM4l7mFtBOCcjPR+B9iMGW4LnGWLHa4bdzNqbj6wj2QYEXYX+"
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"JPWMKlcOvpdEaIcUu0blUA1eX7Bnbx7os02/N4iLRSMY7QuacWwSc24YjhXQgxQ/sT4s0QbQs2kO"
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"dl1o+hiYs09p/8x/7kPaqw/3GZGfkPbmka9C5wiQ30RzJdp3R2cTh3MKozk6ta1bgfYGUzU42sMX"
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"xsP1q4ttuLxfci7Ps18/RwfPI6f2x4QOG087/m8arRlN2vN9yP+G5yiTcpETbUBxCpo7kGZzof3D"
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"OwGG56ca7/NwDkdrwc1qUNiXT4Hrx9hn1WLOj0n7wDF7Vcka9Gw39lyL9Gz51P78ebAv1G9BfWiv"
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"A2kQ+mKhzbP2aEz8s8DsmWGDfbxjc/+OENDfib4b3uNUejmZqGd8g/5EY3k1CWt2cz9nONR380XM"
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"+HPvHlnivU/ce19aA96FA/TsP2984q6jcpeg/f75kTyoxwfFiSW6ZkJLHDHvt8np93Hv3xliCLT2"
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"OIEx3OTeILMf2EztCYKYNcYG2fMQivKdYbQUpY1s/M6ZTcbpivJMMv5Zpdhn7mdpV1GUO1l/NjTU"
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"Usx7Z8Iz3ZuM0xXlFWT8s4CsDkmzJZPD0ThUUWaSye8THZ6RqOj/uf2L1f79T0XZCpn8vJJ0Pkb9"
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"n6IsCOVoBp/HvS+moe83+T4dRVEUZRmyn2F9swl9yAAA";
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static GstBuffer *logo_buf;
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static GMainLoop *main_loop;
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static gint count;
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static GstBuffer *
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create_overlay_buffer (void)
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{
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GZlibDecompressor *decompress;
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GConverterResult decomp_res;
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guchar *gzipped_pixdata, *pixdata;
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gsize gzipped_size, bytes_read, pixdata_size;
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GstBuffer *logo_pixels;
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guint w, h, stride;
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gzipped_pixdata = g_base64_decode (gzipped_pixdata_base64, &gzipped_size);
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g_assert (gzipped_pixdata != NULL);
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pixdata = g_malloc (64 * 1024);
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decompress = g_zlib_decompressor_new (G_ZLIB_COMPRESSOR_FORMAT_GZIP);
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decomp_res = g_converter_convert (G_CONVERTER (decompress),
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gzipped_pixdata, gzipped_size, pixdata, 64 * 1024,
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G_CONVERTER_INPUT_AT_END, &bytes_read, &pixdata_size, NULL);
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g_assert (decomp_res == G_CONVERTER_FINISHED);
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g_assert (bytes_read == gzipped_size);
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g_free (gzipped_pixdata);
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g_object_unref (decompress);
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/* 0: Pixbuf magic (0x47646b50) */
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g_assert (GST_READ_UINT32_BE (pixdata) == 0x47646b50);
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/* 4: length incl. header */
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/* 8: pixdata_type */
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/* 12: rowstride (900) */
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stride = GST_READ_UINT32_BE (pixdata + 12);
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/* 16: width (225) */
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w = GST_READ_UINT32_BE (pixdata + 16);
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/* 20: height (57) */
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h = GST_READ_UINT32_BE (pixdata + 20);
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/* 24: pixel_data */
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GST_LOG ("%dx%d @ %d", w, h, stride);
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/* we assume that the last line also has padding at the end */
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g_assert (pixdata_size - 24 >= h * stride);
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logo_pixels = gst_buffer_new_and_alloc (h * stride);
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gst_buffer_fill (logo_pixels, 0, pixdata + 24, h * stride);
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gst_buffer_add_video_meta (logo_pixels, GST_VIDEO_FRAME_FLAG_NONE,
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GST_VIDEO_OVERLAY_COMPOSITION_FORMAT_RGB, w, h);
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g_free (pixdata);
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return logo_pixels;
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}
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static gboolean
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message_cb (GstBus * bus, GstMessage * message, gpointer user_data)
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{
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switch (GST_MESSAGE_TYPE (message)) {
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case GST_MESSAGE_ERROR:{
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GError *err = NULL;
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gchar *name, *debug = NULL;
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name = gst_object_get_path_string (message->src);
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gst_message_parse_error (message, &err, &debug);
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g_printerr ("ERROR: from element %s: %s\n", name, err->message);
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if (debug != NULL)
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g_printerr ("Additional debug info:\n%s\n", debug);
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g_error_free (err);
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g_free (debug);
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g_free (name);
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g_main_loop_quit (main_loop);
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break;
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}
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case GST_MESSAGE_WARNING:{
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GError *err = NULL;
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gchar *name, *debug = NULL;
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name = gst_object_get_path_string (message->src);
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gst_message_parse_warning (message, &err, &debug);
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g_printerr ("ERROR: from element %s: %s\n", name, err->message);
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if (debug != NULL)
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g_printerr ("Additional debug info:\n%s\n", debug);
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g_error_free (err);
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g_free (debug);
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g_free (name);
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break;
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}
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case GST_MESSAGE_EOS:
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g_print ("Got EOS\n");
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g_main_loop_quit (main_loop);
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break;
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default:
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break;
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}
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return TRUE;
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}
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typedef struct
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{
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gboolean valid;
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GstVideoInfo info;
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} OverlayState;
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static void
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prepare_overlay (GstElement * overlay, GstCaps * caps, gint window_width,
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gint window_height, gpointer user_data)
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{
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OverlayState *s = (OverlayState *) user_data;
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if (gst_video_info_from_caps (&s->info, caps))
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s->valid = TRUE;
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else
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s->valid = FALSE;
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}
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#define SPEED_SCALE_FACTOR (VIDEO_FPS * 4)
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/* nicked from videotestsrc's ball pattern renderer */
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static void
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calculate_position (gint * x, gint * y, guint logo_w, guint logo_h, guint n)
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{
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guint r_x = logo_w / 2;
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guint r_y = logo_h / 2;
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guint w = VIDEO_WIDTH + logo_w;
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guint h = VIDEO_HEIGHT + logo_h;
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*x = r_x + (0.5 + 0.5 * sin (2 * G_PI * n / SPEED_SCALE_FACTOR))
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* (w - 2 * r_x);
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*y = r_y + (0.5 + 0.5 * sin (2 * G_PI * sqrt (2) * n / SPEED_SCALE_FACTOR))
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* (h - 2 * r_y);
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*x -= logo_w;
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*y -= logo_h;
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}
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static GstVideoOverlayComposition *
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draw_overlay (GstElement * overlay, GstSample * sample, gpointer user_data)
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{
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OverlayState *s = (OverlayState *) user_data;
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GstVideoOverlayRectangle *rect;
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GstVideoOverlayComposition *comp;
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GstVideoMeta *vmeta;
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gint x, y;
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if (!s->valid)
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return NULL;
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vmeta = gst_buffer_get_video_meta (logo_buf);
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calculate_position (&x, &y, vmeta->width, vmeta->height, ++count);
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rect = gst_video_overlay_rectangle_new_raw (logo_buf, x, y,
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vmeta->width, vmeta->height, GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE);
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comp = gst_video_overlay_composition_new (rect);
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gst_video_overlay_rectangle_unref (rect);
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return comp;
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}
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int
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main (int argc, char **argv)
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{
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GstElement *pipeline;
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GstElement *src, *capsfilter, *overlay, *conv, *sink;
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GstBus *bus;
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GstCaps *filter_caps;
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OverlayState overlay_state = { 0, };
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gst_init (&argc, &argv);
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pipeline = gst_pipeline_new (NULL);
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src = gst_element_factory_make ("videotestsrc", NULL);
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capsfilter = gst_element_factory_make ("capsfilter", NULL);
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overlay = gst_element_factory_make ("overlaycomposition", NULL);
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conv = gst_element_factory_make ("videoconvert", NULL);
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sink = gst_element_factory_make ("autovideosink", NULL);
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if (!pipeline || !src || !capsfilter || !overlay || !conv || !sink) {
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g_error ("Failed to create elements");
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return -1;
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}
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gst_bin_add_many (GST_BIN (pipeline), src, capsfilter, overlay, conv, sink,
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NULL);
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if (!gst_element_link_many (src, capsfilter, overlay, conv, sink, NULL)) {
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g_error ("Failed to link elements");
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return -2;
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}
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filter_caps = gst_caps_from_string ("video/x-raw, format = "
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GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS);
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gst_caps_set_simple (filter_caps,
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"width", G_TYPE_INT, VIDEO_WIDTH,
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"height", G_TYPE_INT, VIDEO_HEIGHT,
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"framerate", GST_TYPE_FRACTION, VIDEO_FPS, 1, NULL);
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g_object_set (capsfilter, "caps", filter_caps, NULL);
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gst_caps_unref (filter_caps);
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g_signal_connect (overlay, "draw", G_CALLBACK (draw_overlay), &overlay_state);
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g_signal_connect (overlay, "caps-changed",
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G_CALLBACK (prepare_overlay), &overlay_state);
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count = 0;
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logo_buf = create_overlay_buffer ();
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main_loop = g_main_loop_new (NULL, FALSE);
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|
|
||
|
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
|
||
|
gst_bus_add_signal_watch (bus);
|
||
|
g_signal_connect (G_OBJECT (bus), "message", G_CALLBACK (message_cb), NULL);
|
||
|
gst_object_unref (GST_OBJECT (bus));
|
||
|
|
||
|
if (gst_element_set_state (pipeline,
|
||
|
GST_STATE_PLAYING) == GST_STATE_CHANGE_FAILURE) {
|
||
|
g_error ("Failed to go into PLAYING state");
|
||
|
return -3;
|
||
|
}
|
||
|
|
||
|
g_main_loop_run (main_loop);
|
||
|
|
||
|
gst_element_set_state (pipeline, GST_STATE_NULL);
|
||
|
|
||
|
g_main_loop_unref (main_loop);
|
||
|
gst_object_unref (pipeline);
|
||
|
|
||
|
return 0;
|
||
|
}
|