1/*
2 * Copyright (C) 2018 Metrological Group B.V.
3 * Author: Thibault Saunier <tsaunier@igalia.com>
4 * Author: Alejandro G. Castro <alex@igalia.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * aint with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22#include "config.h"
23
24#if ENABLE(MEDIA_STREAM) && USE(LIBWEBRTC) && USE(GSTREAMER)
25#include "GStreamerVideoCapturer.h"
26
27namespace WebCore {
28
29GStreamerVideoCapturer::GStreamerVideoCapturer(GStreamerCaptureDevice device)
30 : GStreamerCapturer(device, adoptGRef(gst_caps_new_empty_simple("video/x-raw")))
31{
32}
33
34GStreamerVideoCapturer::GStreamerVideoCapturer(const char* sourceFactory)
35 : GStreamerCapturer(sourceFactory, adoptGRef(gst_caps_new_empty_simple("video/x-raw")))
36{
37}
38
39GstElement* GStreamerVideoCapturer::createConverter()
40{
41 auto converter = gst_parse_bin_from_description("videoscale ! videoconvert ! videorate", TRUE, nullptr);
42
43 ASSERT(converter);
44
45 return converter;
46}
47
48GstVideoInfo GStreamerVideoCapturer::getBestFormat()
49{
50 GRefPtr<GstCaps> caps = adoptGRef(gst_caps_fixate(gst_device_get_caps(m_device.get())));
51 GstVideoInfo info;
52 gst_video_info_from_caps(&info, caps.get());
53
54 return info;
55}
56
57bool GStreamerVideoCapturer::setSize(int width, int height)
58{
59 if (!width || !height)
60 return false;
61
62 m_caps = adoptGRef(gst_caps_copy(m_caps.get()));
63 gst_caps_set_simple(m_caps.get(), "width", G_TYPE_INT, width, "height", G_TYPE_INT, height, nullptr);
64
65 if (!m_capsfilter)
66 return false;
67
68 g_object_set(m_capsfilter.get(), "caps", m_caps.get(), nullptr);
69
70 return true;
71}
72
73bool GStreamerVideoCapturer::setFrameRate(double frameRate)
74{
75 int numerator, denominator;
76
77 gst_util_double_to_fraction(frameRate, &numerator, &denominator);
78
79 if (numerator < -G_MAXINT) {
80 GST_INFO_OBJECT(m_pipeline.get(), "Framerate %f not allowed", frameRate);
81 return false;
82 }
83
84 if (!numerator) {
85 GST_INFO_OBJECT(m_pipeline.get(), "Do not force variable framerate");
86 return false;
87 }
88
89 m_caps = adoptGRef(gst_caps_copy(m_caps.get()));
90 gst_caps_set_simple(m_caps.get(), "framerate", GST_TYPE_FRACTION, numerator, denominator, nullptr);
91
92 if (!m_capsfilter)
93 return false;
94
95 g_object_set(m_capsfilter.get(), "caps", m_caps.get(), nullptr);
96
97 return true;
98}
99
100} // namespace WebCore
101
102#endif // ENABLE(MEDIA_STREAM) && USE(LIBWEBRTC) && USE(GSTREAMER)
103