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basetextoverlay: Receive window size event and adjust rendering

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* cache window size event and update handle ratio
* init width with 1, don't use 0
* don't update overlay when receiving same window size
* receive window size from allocation query

https://bugzilla.gnome.org/show_bug.cgi?id=751157
This commit is contained in:
Lubosz Sarnecki 2015-03-25 14:10:10 +01:00 committed by Nicolas Dufresne
parent f128666834
commit 91a615fa89
2 changed files with 97 additions and 7 deletions
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99
ext/pango/gstbasetextoverlay.c
View file

@ -268,6 +268,9 @@ gst_base_text_overlay_adjust_values_with_fontdesc (GstBaseTextOverlay * overlay,
PangoFontDescription * desc);
static gboolean gst_base_text_overlay_can_handle_caps (GstCaps * incaps);
static void
gst_base_text_overlay_update_render_size (GstBaseTextOverlay * overlay);
GType
gst_base_text_overlay_get_type (void)
{
@ -632,6 +635,18 @@ gst_base_text_overlay_init (GstBaseTextOverlay * overlay,
overlay->composition = NULL;
overlay->upstream_composition = NULL;
overlay->width = 1;
overlay->height = 1;
overlay->window_width = 1;
overlay->window_height = 1;
overlay->stream_height = 1;
overlay->stream_width = 1;
overlay->image_width = 1;
overlay->image_height = 1;
g_mutex_init (&overlay->lock);
g_cond_init (&overlay->cond);
gst_segment_init (&overlay->segment, GST_FORMAT_TIME);
@ -729,6 +744,7 @@ gst_base_text_overlay_negotiate (GstBaseTextOverlay * overlay, GstCaps * caps)
overlay_caps = gst_caps_ref (caps);
} else {
GstQuery *query;
guint alloc_index;
/* First check if the allocation meta has compositon */
query = gst_query_new_allocation (caps, FALSE);
@ -744,7 +760,31 @@ gst_base_text_overlay_negotiate (GstBaseTextOverlay * overlay, GstCaps * caps)
}
alloc_has_meta = gst_query_find_allocation_meta (query,
GST_VIDEO_OVERLAY_COMPOSITION_META_API_TYPE, NULL);
GST_VIDEO_OVERLAY_COMPOSITION_META_API_TYPE, &alloc_index);
if (alloc_has_meta) {
guint width, height;
const GstStructure *params;
gst_query_parse_nth_allocation_meta (query, alloc_index, &params);
if (params) {
if (!gst_structure_get (params,
"width", G_TYPE_UINT, &width,
"height", G_TYPE_UINT, &height, NULL)) {
GST_ERROR ("%s: Could not read window dimensions",
gst_structure_get_name (params));
} else {
GST_DEBUG ("received window size: %dx%d", width, height);
if ((width != 0 && height != 0) &&
(overlay->window_width != width
|| overlay->window_height != height)) {
overlay->window_width = width;
overlay->window_height = height;
gst_base_text_overlay_update_render_size (overlay);
}
}
}
}
gst_query_unref (query);
@ -839,8 +879,19 @@ gst_base_text_overlay_setcaps (GstBaseTextOverlay * overlay, GstCaps * caps)
overlay->info = info;
overlay->format = GST_VIDEO_INFO_FORMAT (&info);
overlay->width = GST_VIDEO_INFO_WIDTH (&info);
overlay->height = GST_VIDEO_INFO_HEIGHT (&info);
overlay->stream_width = GST_VIDEO_INFO_WIDTH (&info);
overlay->stream_height = GST_VIDEO_INFO_HEIGHT (&info);
if (overlay->width == 1) {
overlay->width = overlay->stream_width;
overlay->height = overlay->stream_height;
GST_DEBUG ("getting rendering dimensions from stream %dx%d",
overlay->width, overlay->height);
}
if (overlay->window_height != 1)
gst_base_text_overlay_update_render_size (overlay);
ret = gst_base_text_overlay_negotiate (overlay, caps);
@ -1103,6 +1154,37 @@ gst_base_text_overlay_src_query (GstPad * pad, GstObject * parent,
return ret;
}
static void
gst_base_text_overlay_update_render_size (GstBaseTextOverlay * overlay)
{
gfloat video_aspect = (float) overlay->stream_width /
(float) overlay->stream_height;
gfloat window_aspect = (float) overlay->window_width /
(float) overlay->window_height;
guint text_buffer_width = 0;
guint text_buffer_height = 0;
if (video_aspect >= window_aspect) {
text_buffer_width = overlay->window_width;
text_buffer_height = window_aspect * overlay->window_height / video_aspect;
} else if (video_aspect < window_aspect) {
text_buffer_width = video_aspect * overlay->window_width / window_aspect;
text_buffer_height = overlay->window_height;
}
overlay->need_render = TRUE;
overlay->width = text_buffer_width;
overlay->height = text_buffer_height;
GST_DEBUG
("updating render dimensions %dx%d from stream %dx%d and window %dx%d",
overlay->width, overlay->height,
overlay->stream_width, overlay->stream_height,
overlay->window_width, overlay->window_height);
}
static gboolean
gst_base_text_overlay_src_event (GstPad * pad, GstObject * parent,
GstEvent * event)
@ -1417,9 +1499,10 @@ gst_base_text_overlay_set_composition (GstBaseTextOverlay * overlay)
gst_base_text_overlay_get_pos (overlay, &xpos, &ypos);
GST_DEBUG ("updating composition for '%s'", overlay->default_text);
GST_DEBUG ("updating composition for '%s' with window size %dx%d",
overlay->default_text, overlay->window_width, overlay->window_height);
if (overlay->text_image) {
if (overlay->text_image && overlay->image_width != 1) {
gst_buffer_add_video_meta (overlay->text_image, GST_VIDEO_FRAME_FLAG_NONE,
GST_VIDEO_OVERLAY_COMPOSITION_FORMAT_RGB,
overlay->image_width, overlay->image_height);
@ -1628,8 +1711,10 @@ gst_base_text_overlay_render_pangocairo (GstBaseTextOverlay * overlay,
cairo_destroy (cr);
cairo_surface_destroy (surface);
gst_buffer_unmap (buffer, &map);
overlay->image_width = width;
overlay->image_height = height;
if (width != 0)
overlay->image_width = width;
if (height != 0)
overlay->image_height = height;
overlay->baseline_y = ink_rect.y;
g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);

5
ext/pango/gstbasetextoverlay.h
View file

@ -170,6 +170,11 @@ struct _GstBaseTextOverlay {
gint image_height;
gint baseline_y;
gint stream_width;
gint stream_height;
gint window_width;
gint window_height;
gboolean auto_adjust_size;
gboolean need_render;