gstreamer/subprojects/gst-plugins-base/tests/interactive/test-overlay-blending.c

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/* GStreamer video overlay composition blending test app
* Copyright (C) 2014 Tim-Philipp Müller <tim centricular com>
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gio/gio.h>
#include <gst/gst.h>
#include <gst/video/video.h>
#include <math.h>
#define VIDEO_WIDTH 720
#define VIDEO_HEIGHT 480
#define VIDEO_FPS 50
/* GdkPixbuf RGBA C-Source image dump from gdk-pixbuf-csource --raw,
* gzipped and then base64 encoded */
const gchar gzipped_pixdata_base64[] =
"H4sICPX/Z1QAA2xvZ28ucGl4AO2dsZHrNhCG+ewK2II64ClyrhmnTtSBh4kLUOLQAUuwEhSgFtiA"
"A7agwA2wBT5AXJ5w4P5LgKLEO97ezDf2SCAIAftjFwuQ7/c///ojy/77+8eP7Jcs+/WfLMv+t/zW"
"dV32pSmK3HK6sXZbFOXV9PZfWipLbWksHdHQZxVpZP+Ee7u62/d7rt0fivIqimJnOX+w/zhauq68"
"aWjevfdUR1h3vXq/KMqzufueFN1J1FE+stf8KfCzobZ3q/ePojyT3v8gDSyB09GFND7g/N014rpl"
"41xF+Wz0/i817nwFjepP+Rb0PnDwOUOehePyQq1eurlrSkXZOkVx7OblbGK43upf+zcqyldhOT22"
"5GvV9ynKXIriQDpKye242Ldcve2KskX6deaRWVeebnpdu32Koryc4t/iaKksmm9Vvg3W3neWk+Vs"
"qS2tpSOu9NmZtLG4f7R15paS7jXct1q7XxTl2ZDd157dp1A/6q9I+1Wg+QH1g8pmcb7M0szUHseV"
"/KTTtJg39XyudH/NASmbhfzOUtqTNHmhew1cglhT9ad8O16kv7m4eFT3/pVNQ77IX8shLgW/RnsW"
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"Ud+rbIqi32M/kC7DtaXzn6vt9Vm95ZbS0lg64rx2nynKdyHQ3oC+A06ZxdtbkztWundpqS1fKo5j"
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"DsnJFq7oWqYtLhd7sbTg3i3dL2VO2Xlt5Oo7DzY1Uc8VtOng9eMZtP0ctpnmJa787Tcm/jbUtmHc"
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"rM/ZveijhWulee+DFrx2xZSHe0Gmn99ix5sd96A+1E97w88pB8bX1ABubfYK4DxG+msYPbWWksqU"
"gu5a0u/O68PQ3t99hWF8kW9vC2gQaWTyWtD2sB5UVzOhGeRLJR2y/pB0k9RHgCqxXaP2kP5Qn9TU"
"n+He7rumwO/j5oSr0FanQZf/jIp33+650qXXjSj2FP2+y58AbYVrPs5PjuyOxsTvq5H+yYb8Mofg"
"u8rgmKb2vq/C+lPtMLj2KOjBbyPSqTS3N9T2Y/D5SbAtdt1r4uapoZ9ife+VroHzlQn2ZCf0dw7K"
"7rk2Cn2VMo6z15pP1KPzt5N72LT+4/Q36hv7d+R8INN/oR2zdunZEcyvANuEPj3SNlkNmvHcIY6x"
"4eeHWbkiSfugvBT3jeLYifKdCdaHggbC+Q7Vi+YOriznW5PG8BENAj3G5FYQTsslWvcxuqqABke6"
"oXzoqGyEfcC1kunnXRRvcfOm2N9mOo4szX1df/DnB4P9BbsOMmANNXf8F9TgaB1p5LlppBehfr+/"
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"1kE5ZD+bfD+DsB48BuXy7L7//mEvgulrKWd3iyUi7ZPzS+J6C1wz+XyFkfMWB0D02tHrl2FfMDYX"
"yfUvitXg2QvBrlHMyM4JEW3oqC+5/orymwbEUWtr5ck65PKidVCGy4leh71AZgwlv9JN6VDQsZSP"
"QddM+iUw7nM5BHWn7jWKbRf6VsrJcjEFtGug2dr7HvntOYQa5OanTT8jY//2tMcXauxCuVBOo+9n"
"YYRxnNIhvN7g2AnGI+iamD4w6bnwqN810QctaUM6V8LlDJFPk9a7qfllzmdVEW2Yg18vmkc/xTrw"
"yTqU9uDD/fgK+b9EHcK1nTDGcF0Hrok6Gyu00c33KBZlifztYY6fPbcG2poUqwl2LeWXuXv4OVEp"
"95XUX/6Yoj5bWx8v0F8OfN3g72rS3TFWewk6RHuHXOwkjoXhfVnsOcdFc5xUJ/Jto7gKlEX5xUlN"
"x/T/RNvFvhA0GDXnCfedPY9+ZUhjvu4Wfy5P0CHKoXGaEMci1TYj7sfqJbI+uBfwSNuFelPPXkp+"
"k823BGXQWuGh3AmYRzf9zpKMOfvyYB8uEiuC8ZXO00zuZ020G83rs8Y/xU8gmwcaRPVKa+uk/LLh"
"8y1NUEbKfc+aww3eP/xS73xIBez5XbKPzwuW3H4h6Ec3j6E9ba6PkR9MGgvBNmPbLeXa58TfKRqM"
"brtJPJuTom/vGm4dwJ2lQXmsWe/cM4l7mFtBOCcjPR+B9iMGW4LnGWLHa4bdzNqbj6wj2QYEXYX+"
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"dl1o+hiYs09p/8x/7kPaqw/3GZGfkPbmka9C5wiQ30RzJdp3R2cTh3MKozk6ta1bgfYGUzU42sMX"
"xsP1q4ttuLxfci7Ps18/RwfPI6f2x4QOG087/m8arRlN2vN9yP+G5yiTcpETbUBxCpo7kGZzof3D"
"OwGG56ca7/NwDkdrwc1qUNiXT4Hrx9hn1WLOj0n7wDF7Vcka9Gw39lyL9Gz51P78ebAv1G9BfWiv"
"A2kQ+mKhzbP2aEz8s8DsmWGDfbxjc/+OENDfib4b3uNUejmZqGd8g/5EY3k1CWt2cz9nONR380XM"
"+HPvHlnivU/ce19aA96FA/TsP2984q6jcpeg/f75kTyoxwfFiSW6ZkJLHDHvt8np93Hv3xliCLT2"
"OIEx3OTeILMf2EztCYKYNcYG2fMQivKdYbQUpY1s/M6ZTcbpivJMMv5Zpdhn7mdpV1GUO1l/NjTU"
"Usx7Z8Iz3ZuM0xXlFWT8s4CsDkmzJZPD0ThUUWaSye8THZ6RqOj/uf2L1f79T0XZCpn8vJJ0Pkb9"
"n6IsCOVoBp/HvS+moe83+T4dRVEUZRmyn2F9swl9yAAA";
static GstBuffer *logo_buf;
static GMainLoop *main_loop;
static gint count;
static GstBuffer *
create_overlay_buffer (void)
{
GZlibDecompressor *decompress;
GConverterResult decomp_res;
guchar *gzipped_pixdata, *pixdata;
gsize gzipped_size, bytes_read, pixdata_size;
GstBuffer *logo_pixels;
guint w, h, stride;
gzipped_pixdata = g_base64_decode (gzipped_pixdata_base64, &gzipped_size);
g_assert (gzipped_pixdata != NULL);
pixdata = g_malloc (64 * 1024);
decompress = g_zlib_decompressor_new (G_ZLIB_COMPRESSOR_FORMAT_GZIP);
decomp_res = g_converter_convert (G_CONVERTER (decompress),
gzipped_pixdata, gzipped_size, pixdata, 64 * 1024,
G_CONVERTER_INPUT_AT_END, &bytes_read, &pixdata_size, NULL);
g_assert (decomp_res == G_CONVERTER_FINISHED);
g_assert (bytes_read == gzipped_size);
g_free (gzipped_pixdata);
g_object_unref (decompress);
/* 0: Pixbuf magic (0x47646b50) */
g_assert (GST_READ_UINT32_BE (pixdata) == 0x47646b50);
/* 4: length incl. header */
/* 8: pixdata_type */
/* 12: rowstride (900) */
stride = GST_READ_UINT32_BE (pixdata + 12);
/* 16: width (225) */
w = GST_READ_UINT32_BE (pixdata + 16);
/* 20: height (57) */
h = GST_READ_UINT32_BE (pixdata + 20);
/* 24: pixel_data */
GST_LOG ("%dx%d @ %d", w, h, stride);
/* we assume that the last line also has padding at the end */
g_assert (pixdata_size - 24 >= h * stride);
logo_pixels = gst_buffer_new_and_alloc (h * stride);
gst_buffer_fill (logo_pixels, 0, pixdata + 24, h * stride);
gst_buffer_add_video_meta (logo_pixels, GST_VIDEO_FRAME_FLAG_NONE,
GST_VIDEO_OVERLAY_COMPOSITION_FORMAT_RGB, w, h);
g_free (pixdata);
return logo_pixels;
}
static gboolean
bus_cb (GstBus * bus, GstMessage * msg, gpointer user_data)
{
GMainLoop *loop = user_data;
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_ERROR:{
GError *err = NULL;
gchar *dbg;
gst_message_parse_error (msg, &err, &dbg);
gst_object_default_error (msg->src, err, dbg);
g_error_free (err);
g_free (dbg);
g_main_loop_quit (loop);
break;
}
default:
break;
}
return TRUE;
}
#define SPEED_SCALE_FACTOR (VIDEO_FPS * 4)
/* nicked from videotestsrc's ball pattern renderer */
static void
calculate_position (gint * x, gint * y, guint logo_w, guint logo_h, guint n)
{
guint r_x = logo_w / 2;
guint r_y = logo_h / 2;
guint w = VIDEO_WIDTH + logo_w;
guint h = VIDEO_HEIGHT + logo_h;
*x = r_x + (0.5 + 0.5 * sin (2 * G_PI * n / SPEED_SCALE_FACTOR))
* (w - 2 * r_x);
*y = r_y + (0.5 + 0.5 * sin (2 * G_PI * sqrt (2) * n / SPEED_SCALE_FACTOR))
* (h - 2 * r_y);
*x -= logo_w;
*y -= logo_h;
}
static GstPadProbeReturn
buffer_cb (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
{
GstVideoOverlayRectangle *rect;
GstVideoOverlayComposition *comp;
GstVideoFrame frame;
GstVideoMeta *vmeta;
GstVideoInfo vinfo;
GstCaps *caps;
gint x, y;
caps = gst_pad_get_current_caps (pad);
gst_video_info_from_caps (&vinfo, caps);
gst_caps_unref (caps);
info->data = gst_buffer_make_writable (info->data);
vmeta = gst_buffer_get_video_meta (logo_buf);
calculate_position (&x, &y, vmeta->width, vmeta->height, ++count);
GST_LOG ("%3d, %3d", x, y);
rect = gst_video_overlay_rectangle_new_raw (logo_buf, x, y,
vmeta->width, vmeta->height, GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE);
comp = gst_video_overlay_composition_new (rect);
gst_video_overlay_rectangle_unref (rect);
gst_video_frame_map (&frame, &vinfo, info->data, GST_MAP_READWRITE);
if (!gst_video_overlay_composition_blend (comp, &frame))
g_warning ("Error blending overlay at position (%d,%d)", x, y);
gst_video_frame_unmap (&frame);
gst_video_overlay_composition_unref (comp);
return GST_PAD_PROBE_OK;
}
int
main (int argc, char **argv)
{
GOptionEntry options[] = {
{NULL}
};
GOptionContext *ctx;
GError *err = NULL;
GstElement *src, *q, *capsfilter, *sink;
GstElement *pipeline;
GstPad *src_pad;
GstCaps *filter_caps;
ctx = g_option_context_new ("");
g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
g_option_context_add_group (ctx, gst_init_get_option_group ());
if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
g_print ("Error initializing: %s\n", err->message);
return 1;
}
g_option_context_free (ctx);
logo_buf = create_overlay_buffer ();
main_loop = g_main_loop_new (NULL, FALSE);
pipeline = gst_pipeline_new ("pipeline");
src = gst_element_factory_make ("videotestsrc", NULL);
gst_util_set_object_arg (G_OBJECT (src), "pattern", "white");
src_pad = gst_element_get_static_pad (src, "src");
gst_pad_add_probe (src_pad, GST_PAD_PROBE_TYPE_BUFFER, buffer_cb,
main_loop, NULL);
gst_object_unref (src_pad);
q = gst_element_factory_make ("queue", NULL);
capsfilter = gst_element_factory_make ("capsfilter", NULL);
filter_caps = gst_caps_from_string ("video/x-raw, format = "
GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS);
gst_caps_set_simple (filter_caps,
"width", G_TYPE_INT, VIDEO_WIDTH,
"height", G_TYPE_INT, VIDEO_HEIGHT,
"framerate", GST_TYPE_FRACTION, VIDEO_FPS, 1, NULL);
g_object_set (capsfilter, "caps", filter_caps, NULL);
gst_caps_unref (filter_caps);
sink = gst_element_factory_make ("ximagesink", NULL);
gst_bin_add_many (GST_BIN (pipeline), src, q, capsfilter, sink, NULL);
gst_element_link_many (src, q, capsfilter, sink, NULL);
count = 0;
gst_element_set_state (pipeline, GST_STATE_PLAYING);
gst_bus_add_watch (GST_ELEMENT_BUS (pipeline), bus_cb, main_loop);
g_main_loop_run (main_loop);
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
gst_buffer_unref (logo_buf);
return 0;
}