mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-26 19:51:11 +00:00
qmlsink: support caps changes better
We need to hold onto the last buffer until the next buffer arrives. Before, if a caps change comes we would remove the currently rendering buffer. if Qt asks use to render something, we would render the dummy black texture. Fixes a period of black output when upstream is e.g. changing resolution as in hls adaptive bitrate scenarios. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1338>
This commit is contained in:
Matthew Waters
GStreamer Marge Bot
parent
1e27ea63af
commit
d2fd5f1534
1 changed files with 90 additions and 101 deletions
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@ -69,9 +69,10 @@ struct _QtGLVideoItemPrivate
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gint display_width;
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gint display_height;
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gboolean negotiated;
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GstBuffer *buffer;
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GstCaps *new_caps;
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GstCaps *caps;
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GstVideoInfo new_v_info;
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GstVideoInfo v_info;
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gboolean initted;
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@ -158,6 +159,7 @@ QtGLVideoItem::~QtGLVideoItem()
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gst_buffer_replace (&this->priv->buffer, NULL);
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gst_caps_replace (&this->priv->caps, NULL);
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gst_caps_replace (&this->priv->new_caps, NULL);
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g_weak_ref_clear (&this->priv->sink);
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@ -201,6 +203,70 @@ QtGLVideoItem::itemInitialized()
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return this->priv->initted;
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}
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static gboolean
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_calculate_par (QtGLVideoItem * widget, GstVideoInfo * info)
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{
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gboolean ok;
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gint width, height;
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gint par_n, par_d;
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gint display_par_n, display_par_d;
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guint display_ratio_num, display_ratio_den;
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width = GST_VIDEO_INFO_WIDTH (info);
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height = GST_VIDEO_INFO_HEIGHT (info);
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par_n = GST_VIDEO_INFO_PAR_N (info);
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par_d = GST_VIDEO_INFO_PAR_D (info);
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if (!par_n)
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par_n = 1;
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/* get display's PAR */
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if (widget->priv->par_n != 0 && widget->priv->par_d != 0) {
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display_par_n = widget->priv->par_n;
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display_par_d = widget->priv->par_d;
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} else {
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display_par_n = 1;
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display_par_d = 1;
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}
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ok = gst_video_calculate_display_ratio (&display_ratio_num,
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&display_ratio_den, width, height, par_n, par_d, display_par_n,
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display_par_d);
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if (!ok)
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return FALSE;
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widget->setImplicitWidth (width);
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widget->setImplicitHeight (height);
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GST_LOG ("%p PAR: %u/%u DAR:%u/%u", widget, par_n, par_d, display_par_n,
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display_par_d);
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if (height % display_ratio_den == 0) {
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GST_DEBUG ("%p keeping video height", widget);
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widget->priv->display_width = (guint)
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gst_util_uint64_scale_int (height, display_ratio_num,
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display_ratio_den);
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widget->priv->display_height = height;
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} else if (width % display_ratio_num == 0) {
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GST_DEBUG ("%p keeping video width", widget);
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widget->priv->display_width = width;
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widget->priv->display_height = (guint)
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gst_util_uint64_scale_int (width, display_ratio_den, display_ratio_num);
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} else {
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GST_DEBUG ("%p approximating while keeping video height", widget);
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widget->priv->display_width = (guint)
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gst_util_uint64_scale_int (height, display_ratio_num,
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display_ratio_den);
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widget->priv->display_height = height;
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}
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GST_DEBUG ("%p scaling to %dx%d", widget, widget->priv->display_width,
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widget->priv->display_height);
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return TRUE;
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}
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QSGNode *
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QtGLVideoItem::updatePaintNode(QSGNode * oldNode,
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UpdatePaintNodeData * updatePaintNodeData)
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@ -217,16 +283,30 @@ QtGLVideoItem::updatePaintNode(QSGNode * oldNode,
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g_mutex_lock (&this->priv->lock);
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if (gst_gl_context_get_current() == NULL)
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gst_gl_context_activate (this->priv->other_context, TRUE);
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GST_TRACE ("%p updatePaintNode", this);
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if (this->priv->new_caps) {
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GST_DEBUG ("%p caps change from %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT,
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this, this->priv->caps, this->priv->new_caps);
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gst_caps_take (&this->priv->caps, this->priv->new_caps);
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this->priv->new_caps = NULL;
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this->priv->v_info = this->priv->new_v_info;
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if (!_calculate_par (this, &this->priv->v_info)) {
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g_mutex_unlock (&this->priv->lock);
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return NULL;
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}
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}
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if (!this->priv->caps) {
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GST_LOG ("%p no caps yet", this);
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g_mutex_unlock (&this->priv->lock);
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return NULL;
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}
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if (gst_gl_context_get_current() == NULL)
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gst_gl_context_activate (this->priv->other_context, TRUE);
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if (!texNode) {
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texNode = new QSGSimpleTextureNode ();
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texNode->setOwnsTexture (true);
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@ -400,7 +480,7 @@ QtGLVideoItem::hoverMoveEvent(QHoverEvent * event)
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g_mutex_lock (&this->priv->lock);
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/* can't do anything when we don't have input format */
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if (!this->priv->negotiated) {
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if (!this->priv->caps) {
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g_mutex_unlock (&this->priv->lock);
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return;
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}
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@ -439,7 +519,7 @@ QtGLVideoItem::sendMouseEvent(QMouseEvent * event, const gchar * type)
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g_mutex_lock (&this->priv->lock);
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/* can't do anything when we don't have input format */
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if (!this->priv->negotiated) {
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if (!this->priv->caps) {
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g_mutex_unlock (&this->priv->lock);
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return;
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}
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@ -471,27 +551,6 @@ QtGLVideoItem::mouseReleaseEvent(QMouseEvent * event)
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sendMouseEvent(event, "release");
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}
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static void
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_reset (QtGLVideoItem * qt_item)
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{
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GstBuffer *tmp_buffer;
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gst_buffer_replace (&qt_item->priv->buffer, NULL);
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gst_caps_replace (&qt_item->priv->caps, NULL);
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qt_item->priv->negotiated = FALSE;
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while ((tmp_buffer = (GstBuffer*) g_queue_pop_head (&qt_item->priv->potentially_unbound_buffers))) {
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GST_TRACE ("old buffer %p should be unbound now, unreffing", tmp_buffer);
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gst_buffer_unref (tmp_buffer);
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}
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while ((tmp_buffer = (GstBuffer*) g_queue_pop_head (&qt_item->priv->bound_buffers))) {
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GST_TRACE ("old buffer %p should be unbound now, unreffing", tmp_buffer);
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gst_buffer_unref (tmp_buffer);
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}
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}
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void
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QtGLVideoItemInterface::setSink (GstElement * sink)
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{
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@ -514,7 +573,7 @@ QtGLVideoItemInterface::setBuffer (GstBuffer * buffer)
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return;
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}
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if (!qt_item->priv->negotiated) {
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if (!qt_item->priv->caps && !qt_item->priv->new_caps) {
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GST_WARNING ("%p Got buffer on unnegotiated QtGLVideoItem. Dropping", this);
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return;
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}
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@ -636,70 +695,6 @@ QtGLVideoItem::handleWindowChanged (QQuickWindow * win)
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}
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}
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static gboolean
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_calculate_par (QtGLVideoItem * widget, GstVideoInfo * info)
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{
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gboolean ok;
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gint width, height;
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gint par_n, par_d;
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gint display_par_n, display_par_d;
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guint display_ratio_num, display_ratio_den;
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width = GST_VIDEO_INFO_WIDTH (info);
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height = GST_VIDEO_INFO_HEIGHT (info);
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par_n = GST_VIDEO_INFO_PAR_N (info);
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par_d = GST_VIDEO_INFO_PAR_D (info);
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if (!par_n)
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par_n = 1;
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/* get display's PAR */
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if (widget->priv->par_n != 0 && widget->priv->par_d != 0) {
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display_par_n = widget->priv->par_n;
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display_par_d = widget->priv->par_d;
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} else {
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display_par_n = 1;
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display_par_d = 1;
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}
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ok = gst_video_calculate_display_ratio (&display_ratio_num,
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&display_ratio_den, width, height, par_n, par_d, display_par_n,
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display_par_d);
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if (!ok)
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return FALSE;
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widget->setImplicitWidth (width);
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widget->setImplicitHeight (height);
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GST_LOG ("%p PAR: %u/%u DAR:%u/%u", widget, par_n, par_d, display_par_n,
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display_par_d);
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if (height % display_ratio_den == 0) {
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GST_DEBUG ("%p keeping video height", widget);
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widget->priv->display_width = (guint)
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gst_util_uint64_scale_int (height, display_ratio_num,
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display_ratio_den);
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widget->priv->display_height = height;
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} else if (width % display_ratio_num == 0) {
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GST_DEBUG ("%p keeping video width", widget);
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widget->priv->display_width = width;
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widget->priv->display_height = (guint)
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gst_util_uint64_scale_int (width, display_ratio_den, display_ratio_num);
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} else {
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GST_DEBUG ("%p approximating while keeping video height", widget);
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widget->priv->display_width = (guint)
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gst_util_uint64_scale_int (height, display_ratio_num,
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display_ratio_den);
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widget->priv->display_height = height;
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}
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GST_DEBUG ("%p scaling to %dx%d", widget, widget->priv->display_width,
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widget->priv->display_height);
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return TRUE;
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}
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gboolean
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QtGLVideoItemInterface::setCaps (GstCaps * caps)
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{
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@ -720,17 +715,11 @@ QtGLVideoItemInterface::setCaps (GstCaps * caps)
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g_mutex_lock (&qt_item->priv->lock);
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_reset (qt_item);
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GST_DEBUG ("%p set caps %" GST_PTR_FORMAT, qt_item, caps);
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gst_caps_replace (&qt_item->priv->caps, caps);
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gst_caps_replace (&qt_item->priv->new_caps, caps);
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if (!_calculate_par (qt_item, &v_info)) {
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g_mutex_unlock (&qt_item->priv->lock);
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return FALSE;
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}
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qt_item->priv->v_info = v_info;
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qt_item->priv->negotiated = TRUE;
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qt_item->priv->new_v_info = v_info;
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g_mutex_unlock (&qt_item->priv->lock);
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