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++ // 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()
++ {
++ }