1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
// Copyright (C) 2018 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QMutexLocker>
#include <QtMultimedia/QVideoFrame>
#include "videoplayer.h"
TextureWidget::TextureWidget(QWidget *parent)
: QOpenGLWidget(parent)
, m_texture(QOpenGLTexture::Target2D)
{
}
// Main thread
void TextureWidget::initializeGL()
{
initializeOpenGLFunctions();
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
if (!m_shader.addShaderFromSourceCode(QOpenGLShader::Vertex,
"#version 330\n"
"out vec2 coords;\n"
"const vec2 positions[6] = vec2[] ("
" vec2(-1.0, 1.0),"
" vec2(-1.0, -1.0),"
" vec2(1.0, 1.0),"
" vec2(1.0, 1.0),"
" vec2(-1.0, -1.0),"
" vec2(1.0, -1.0));\n"
"const vec2 texCoords[6] = vec2[] ("
" vec2(0.0, 0.0),"
" vec2(0.0, 1.0),"
" vec2(1.0, 0.0),"
" vec2(1.0, 0.0),"
" vec2(0.0, 1.0),"
" vec2(1.0, 1.0));\n"
"void main() {\n"
" coords = texCoords[gl_VertexID];\n"
" gl_Position = vec4(positions[gl_VertexID], 0.0, 1.0);\n"
"}"))
qDebug() << "Failed to load vertex shader" << m_shader.log();
if (!m_shader.addShaderFromSourceCode(QOpenGLShader::Fragment,
"#version 330\n"
"in vec2 coords;\n"
"uniform sampler2D video_texture;\n"
"out vec4 fragColor;\n"
"void main() {\n"
" fragColor = texture(video_texture, coords);\n"
"}"))
qDebug() << "Failed to load fragment shader" << m_shader.log();
if (!m_shader.link())
qDebug() << "Failed to link shaders" << m_shader.log();
qDebug() << Q_FUNC_INFO << context()->shareContext();
m_vao.create();
}
// Main thread
void TextureWidget::paintGL()
{
glViewport(0, 0, width(), height());
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
if (!m_texture.isCreated())
return;
m_shader.bind();
m_texture.bind(0);
m_shader.setUniformValue("video_texture", 0);
m_vao.bind();
glDrawArrays(GL_TRIANGLES, 0, 6);
m_vao.release();
m_shader.release();
}
void TextureWidget::setVideoFrame(const QVideoFrame &frame)
{
QVideoFrame f = frame;
// Map frame
if (!f.map(QAbstractVideoBuffer::ReadOnly))
return;
makeCurrent();
// Create or recreate texture
if (m_texture.width() != f.width() || m_texture.height() != f.height()) {
if (m_texture.isCreated())
m_texture.destroy();
m_texture.setSize(f.width(), f.height());
m_texture.setFormat(QOpenGLTexture::RGBA32F);
m_texture.setWrapMode(QOpenGLTexture::ClampToBorder);
m_texture.setMinificationFilter(QOpenGLTexture::Nearest);
m_texture.setMagnificationFilter(QOpenGLTexture::Nearest);
m_texture.allocateStorage();
m_texture.create();
emit textureIdChanged(m_texture.textureId());
}
const QVideoFrame::PixelFormat pFormat = f.pixelFormat();
if (pFormat == QVideoFrame::Format_RGB32) {
m_texture.setData(QOpenGLTexture::RGBA, QOpenGLTexture::UInt8, f.bits());
}
doneCurrent();
// Request display udpate
QOpenGLWidget::update();
// Unmap
f.unmap();
}
QList<QVideoFrame::PixelFormat> GLVideoSurface::supportedPixelFormats(QAbstractVideoBuffer::HandleType type) const
{
if (type == QAbstractVideoBuffer::NoHandle)
return {
QVideoFrame::Format_RGB32,
QVideoFrame::Format_ARGB32,
QVideoFrame::Format_BGR32,
QVideoFrame::Format_BGRA32
};
return {};
}
// Video player thread
bool GLVideoSurface::present(const QVideoFrame &frame)
{
emit onNewFrame(frame);
return true;
}
VideoPlayer::VideoPlayer(TextureWidget *textureWidget)
: QObject(textureWidget)
, m_player(new QMediaPlayer(nullptr, QMediaPlayer::VideoSurface))
, m_surface(new GLVideoSurface())
{
m_player->setMedia(QUrl("https://www.sample-videos.com/video123/mp4/720/big_buck_bunny_720p_1mb.mp4"));
// Tell player to render on GLVideoSurface
m_player->setVideoOutput(m_surface.get());
// Display errors
QObject::connect(m_player.get(), QOverload<QMediaPlayer::Error>::of(&QMediaPlayer::error),
m_player.get(), [this] (QMediaPlayer::Error e) {
qDebug() << Q_FUNC_INFO << e << m_player->errorString();
});
// Repeat video indefinitely
QObject::connect(m_player.get(), &QMediaPlayer::stateChanged, m_player.get(), [this] (QMediaPlayer::State state) {
if (state == QMediaPlayer::StoppedState)
m_player->play();
});
QObject::connect(m_surface.get(), &GLVideoSurface::onNewFrame,
textureWidget, &TextureWidget::setVideoFrame, Qt::DirectConnection);
// Start playing
m_player->play();
}
VideoPlayer::~VideoPlayer()
{
}
|
