mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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3140 lines
102 KiB
C
3140 lines
102 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2003> David Schleef <ds@schleef.org>
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* Copyright (C) <2006> Julien Moutte <julien@moutte.net>
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* Copyright (C) <2006> Zeeshan Ali <zeeshan.ali@nokia.com>
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* Copyright (C) <2006-2008> Tim-Philipp Müller <tim centricular net>
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* Copyright (C) <2009> Young-Ho Cha <ganadist@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <gst/video/video.h>
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#include <gst/video/gstvideometa.h>
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#include "gstbasetextoverlay.h"
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#include "gsttextoverlay.h"
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#include "gsttimeoverlay.h"
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#include "gstclockoverlay.h"
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#include "gsttextrender.h"
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#include <string.h>
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#include <math.h>
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/* FIXME:
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* - use proper strides and offset for I420
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* - if text is wider than the video picture, it does not get
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* clipped properly during blitting (if wrapping is disabled)
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*/
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GST_DEBUG_CATEGORY (pango_debug);
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#define GST_CAT_DEFAULT pango_debug
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#define DEFAULT_PROP_TEXT ""
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#define DEFAULT_PROP_SHADING FALSE
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#define DEFAULT_PROP_VALIGNMENT GST_BASE_TEXT_OVERLAY_VALIGN_BASELINE
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#define DEFAULT_PROP_HALIGNMENT GST_BASE_TEXT_OVERLAY_HALIGN_CENTER
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#define DEFAULT_PROP_XPAD 25
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#define DEFAULT_PROP_YPAD 25
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#define DEFAULT_PROP_DELTAX 0
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#define DEFAULT_PROP_DELTAY 0
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#define DEFAULT_PROP_XPOS 0.5
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#define DEFAULT_PROP_YPOS 0.5
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#define DEFAULT_PROP_WRAP_MODE GST_BASE_TEXT_OVERLAY_WRAP_MODE_WORD_CHAR
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#define DEFAULT_PROP_FONT_DESC ""
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#define DEFAULT_PROP_SILENT FALSE
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#define DEFAULT_PROP_LINE_ALIGNMENT GST_BASE_TEXT_OVERLAY_LINE_ALIGN_CENTER
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#define DEFAULT_PROP_WAIT_TEXT TRUE
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#define DEFAULT_PROP_AUTO_ADJUST_SIZE TRUE
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#define DEFAULT_PROP_VERTICAL_RENDER FALSE
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#define DEFAULT_PROP_SCALE_MODE GST_BASE_TEXT_OVERLAY_SCALE_MODE_NONE
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#define DEFAULT_PROP_SCALE_PAR_N 1
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#define DEFAULT_PROP_SCALE_PAR_D 1
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#define DEFAULT_PROP_DRAW_SHADOW TRUE
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#define DEFAULT_PROP_DRAW_OUTLINE TRUE
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#define DEFAULT_PROP_COLOR 0xffffffff
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#define DEFAULT_PROP_OUTLINE_COLOR 0xff000000
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#define DEFAULT_PROP_SHADING_VALUE 80
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#define DEFAULT_PROP_TEXT_X 0
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#define DEFAULT_PROP_TEXT_Y 0
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#define DEFAULT_PROP_TEXT_WIDTH 1
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#define DEFAULT_PROP_TEXT_HEIGHT 1
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#define MINIMUM_OUTLINE_OFFSET 1.0
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#define DEFAULT_SCALE_BASIS 640
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enum
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{
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PROP_0,
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PROP_TEXT,
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PROP_SHADING,
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PROP_SHADING_VALUE,
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PROP_HALIGNMENT,
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PROP_VALIGNMENT,
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PROP_XPAD,
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PROP_YPAD,
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PROP_DELTAX,
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PROP_DELTAY,
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PROP_XPOS,
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PROP_YPOS,
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PROP_X_ABSOLUTE,
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PROP_Y_ABSOLUTE,
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PROP_WRAP_MODE,
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PROP_FONT_DESC,
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PROP_SILENT,
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PROP_LINE_ALIGNMENT,
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PROP_WAIT_TEXT,
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PROP_AUTO_ADJUST_SIZE,
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PROP_VERTICAL_RENDER,
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PROP_SCALE_MODE,
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PROP_SCALE_PAR,
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PROP_COLOR,
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PROP_DRAW_SHADOW,
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PROP_DRAW_OUTLINE,
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PROP_OUTLINE_COLOR,
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PROP_TEXT_X,
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PROP_TEXT_Y,
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PROP_TEXT_WIDTH,
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PROP_TEXT_HEIGHT,
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PROP_LAST
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};
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#define VIDEO_FORMATS GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS
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#define BASE_TEXT_OVERLAY_CAPS GST_VIDEO_CAPS_MAKE (VIDEO_FORMATS)
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#define BASE_TEXT_OVERLAY_ALL_CAPS BASE_TEXT_OVERLAY_CAPS ";" \
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GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("ANY", GST_VIDEO_FORMATS_ALL)
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static GstStaticCaps sw_template_caps =
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GST_STATIC_CAPS (BASE_TEXT_OVERLAY_CAPS);
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static GstStaticPadTemplate src_template_factory =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (BASE_TEXT_OVERLAY_ALL_CAPS)
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);
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static GstStaticPadTemplate video_sink_template_factory =
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GST_STATIC_PAD_TEMPLATE ("video_sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (BASE_TEXT_OVERLAY_ALL_CAPS)
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);
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#define GST_TYPE_BASE_TEXT_OVERLAY_VALIGN (gst_base_text_overlay_valign_get_type())
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static GType
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gst_base_text_overlay_valign_get_type (void)
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{
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static GType base_text_overlay_valign_type = 0;
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static const GEnumValue base_text_overlay_valign[] = {
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{GST_BASE_TEXT_OVERLAY_VALIGN_BASELINE, "baseline", "baseline"},
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{GST_BASE_TEXT_OVERLAY_VALIGN_BOTTOM, "bottom", "bottom"},
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{GST_BASE_TEXT_OVERLAY_VALIGN_TOP, "top", "top"},
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{GST_BASE_TEXT_OVERLAY_VALIGN_POS, "position",
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"Absolute position clamped to canvas"},
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{GST_BASE_TEXT_OVERLAY_VALIGN_CENTER, "center", "center"},
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{GST_BASE_TEXT_OVERLAY_VALIGN_ABSOLUTE, "absolute", "Absolute position"},
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{0, NULL, NULL},
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};
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if (!base_text_overlay_valign_type) {
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base_text_overlay_valign_type =
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g_enum_register_static ("GstBaseTextOverlayVAlign",
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base_text_overlay_valign);
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}
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return base_text_overlay_valign_type;
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}
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#define GST_TYPE_BASE_TEXT_OVERLAY_HALIGN (gst_base_text_overlay_halign_get_type())
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static GType
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gst_base_text_overlay_halign_get_type (void)
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{
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static GType base_text_overlay_halign_type = 0;
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static const GEnumValue base_text_overlay_halign[] = {
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{GST_BASE_TEXT_OVERLAY_HALIGN_LEFT, "left", "left"},
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{GST_BASE_TEXT_OVERLAY_HALIGN_CENTER, "center", "center"},
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{GST_BASE_TEXT_OVERLAY_HALIGN_RIGHT, "right", "right"},
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{GST_BASE_TEXT_OVERLAY_HALIGN_POS, "position",
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"Absolute position clamped to canvas"},
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{GST_BASE_TEXT_OVERLAY_HALIGN_ABSOLUTE, "absolute", "Absolute position"},
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{0, NULL, NULL},
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};
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if (!base_text_overlay_halign_type) {
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base_text_overlay_halign_type =
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g_enum_register_static ("GstBaseTextOverlayHAlign",
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base_text_overlay_halign);
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}
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return base_text_overlay_halign_type;
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}
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#define GST_TYPE_BASE_TEXT_OVERLAY_WRAP_MODE (gst_base_text_overlay_wrap_mode_get_type())
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static GType
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gst_base_text_overlay_wrap_mode_get_type (void)
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{
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static GType base_text_overlay_wrap_mode_type = 0;
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static const GEnumValue base_text_overlay_wrap_mode[] = {
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{GST_BASE_TEXT_OVERLAY_WRAP_MODE_NONE, "none", "none"},
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{GST_BASE_TEXT_OVERLAY_WRAP_MODE_WORD, "word", "word"},
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{GST_BASE_TEXT_OVERLAY_WRAP_MODE_CHAR, "char", "char"},
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{GST_BASE_TEXT_OVERLAY_WRAP_MODE_WORD_CHAR, "wordchar", "wordchar"},
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{0, NULL, NULL},
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};
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if (!base_text_overlay_wrap_mode_type) {
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base_text_overlay_wrap_mode_type =
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g_enum_register_static ("GstBaseTextOverlayWrapMode",
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base_text_overlay_wrap_mode);
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}
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return base_text_overlay_wrap_mode_type;
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}
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#define GST_TYPE_BASE_TEXT_OVERLAY_LINE_ALIGN (gst_base_text_overlay_line_align_get_type())
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static GType
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gst_base_text_overlay_line_align_get_type (void)
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{
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static GType base_text_overlay_line_align_type = 0;
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static const GEnumValue base_text_overlay_line_align[] = {
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{GST_BASE_TEXT_OVERLAY_LINE_ALIGN_LEFT, "left", "left"},
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{GST_BASE_TEXT_OVERLAY_LINE_ALIGN_CENTER, "center", "center"},
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{GST_BASE_TEXT_OVERLAY_LINE_ALIGN_RIGHT, "right", "right"},
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{0, NULL, NULL}
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};
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if (!base_text_overlay_line_align_type) {
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base_text_overlay_line_align_type =
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g_enum_register_static ("GstBaseTextOverlayLineAlign",
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base_text_overlay_line_align);
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}
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return base_text_overlay_line_align_type;
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}
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#define GST_TYPE_BASE_TEXT_OVERLAY_SCALE_MODE (gst_base_text_overlay_scale_mode_get_type())
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static GType
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gst_base_text_overlay_scale_mode_get_type (void)
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{
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static GType base_text_overlay_scale_mode_type = 0;
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static const GEnumValue base_text_overlay_scale_mode[] = {
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{GST_BASE_TEXT_OVERLAY_SCALE_MODE_NONE, "none", "none"},
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{GST_BASE_TEXT_OVERLAY_SCALE_MODE_PAR, "par", "par"},
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{GST_BASE_TEXT_OVERLAY_SCALE_MODE_DISPLAY, "display", "display"},
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{GST_BASE_TEXT_OVERLAY_SCALE_MODE_USER, "user", "user"},
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{0, NULL, NULL}
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};
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if (!base_text_overlay_scale_mode_type) {
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base_text_overlay_scale_mode_type =
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g_enum_register_static ("GstBaseTextOverlayScaleMode",
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base_text_overlay_scale_mode);
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}
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return base_text_overlay_scale_mode_type;
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}
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#define GST_BASE_TEXT_OVERLAY_GET_LOCK(ov) (&GST_BASE_TEXT_OVERLAY (ov)->lock)
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#define GST_BASE_TEXT_OVERLAY_GET_COND(ov) (&GST_BASE_TEXT_OVERLAY (ov)->cond)
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#define GST_BASE_TEXT_OVERLAY_LOCK(ov) (g_mutex_lock (GST_BASE_TEXT_OVERLAY_GET_LOCK (ov)))
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#define GST_BASE_TEXT_OVERLAY_UNLOCK(ov) (g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_LOCK (ov)))
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#define GST_BASE_TEXT_OVERLAY_WAIT(ov) (g_cond_wait (GST_BASE_TEXT_OVERLAY_GET_COND (ov), GST_BASE_TEXT_OVERLAY_GET_LOCK (ov)))
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#define GST_BASE_TEXT_OVERLAY_SIGNAL(ov) (g_cond_signal (GST_BASE_TEXT_OVERLAY_GET_COND (ov)))
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#define GST_BASE_TEXT_OVERLAY_BROADCAST(ov)(g_cond_broadcast (GST_BASE_TEXT_OVERLAY_GET_COND (ov)))
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static GstElementClass *parent_class = NULL;
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static void gst_base_text_overlay_base_init (gpointer g_class);
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static void gst_base_text_overlay_class_init (GstBaseTextOverlayClass * klass);
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static void gst_base_text_overlay_init (GstBaseTextOverlay * overlay,
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GstBaseTextOverlayClass * klass);
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static GstStateChangeReturn gst_base_text_overlay_change_state (GstElement *
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element, GstStateChange transition);
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static GstCaps *gst_base_text_overlay_get_videosink_caps (GstPad * pad,
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GstBaseTextOverlay * overlay, GstCaps * filter);
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static GstCaps *gst_base_text_overlay_get_src_caps (GstPad * pad,
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GstBaseTextOverlay * overlay, GstCaps * filter);
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static gboolean gst_base_text_overlay_setcaps (GstBaseTextOverlay * overlay,
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GstCaps * caps);
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static gboolean gst_base_text_overlay_setcaps_txt (GstBaseTextOverlay * overlay,
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GstCaps * caps);
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static gboolean gst_base_text_overlay_src_event (GstPad * pad,
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GstObject * parent, GstEvent * event);
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static gboolean gst_base_text_overlay_src_query (GstPad * pad,
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GstObject * parent, GstQuery * query);
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static gboolean gst_base_text_overlay_video_event (GstPad * pad,
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GstObject * parent, GstEvent * event);
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static gboolean gst_base_text_overlay_video_query (GstPad * pad,
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GstObject * parent, GstQuery * query);
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static GstFlowReturn gst_base_text_overlay_video_chain (GstPad * pad,
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GstObject * parent, GstBuffer * buffer);
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static gboolean gst_base_text_overlay_text_event (GstPad * pad,
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GstObject * parent, GstEvent * event);
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static GstFlowReturn gst_base_text_overlay_text_chain (GstPad * pad,
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GstObject * parent, GstBuffer * buffer);
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static GstPadLinkReturn gst_base_text_overlay_text_pad_link (GstPad * pad,
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GstObject * parent, GstPad * peer);
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static void gst_base_text_overlay_text_pad_unlink (GstPad * pad,
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GstObject * parent);
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static void gst_base_text_overlay_pop_text (GstBaseTextOverlay * overlay);
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static void gst_base_text_overlay_finalize (GObject * object);
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static void gst_base_text_overlay_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_base_text_overlay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void
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gst_base_text_overlay_adjust_values_with_fontdesc (GstBaseTextOverlay * overlay,
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PangoFontDescription * desc);
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static gboolean gst_base_text_overlay_can_handle_caps (GstCaps * incaps);
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static void
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gst_base_text_overlay_update_render_size (GstBaseTextOverlay * overlay);
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GType
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gst_base_text_overlay_get_type (void)
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{
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static GType type = 0;
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if (g_once_init_enter ((gsize *) & type)) {
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static const GTypeInfo info = {
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sizeof (GstBaseTextOverlayClass),
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(GBaseInitFunc) gst_base_text_overlay_base_init,
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NULL,
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(GClassInitFunc) gst_base_text_overlay_class_init,
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NULL,
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NULL,
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sizeof (GstBaseTextOverlay),
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0,
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(GInstanceInitFunc) gst_base_text_overlay_init,
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};
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g_once_init_leave ((gsize *) & type,
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g_type_register_static (GST_TYPE_ELEMENT, "GstBaseTextOverlay", &info,
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0));
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}
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return type;
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}
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static gchar *
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gst_base_text_overlay_get_text (GstBaseTextOverlay * overlay,
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GstBuffer * video_frame)
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{
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return g_strdup (overlay->default_text);
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}
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static void
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gst_base_text_overlay_base_init (gpointer g_class)
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{
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GstBaseTextOverlayClass *klass = GST_BASE_TEXT_OVERLAY_CLASS (g_class);
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PangoFontMap *fontmap;
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/* Only lock for the subclasses here, the base class
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* doesn't have this mutex yet and it's not necessary
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* here */
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if (klass->pango_lock)
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g_mutex_lock (klass->pango_lock);
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fontmap = pango_cairo_font_map_get_default ();
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klass->pango_context =
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pango_font_map_create_context (PANGO_FONT_MAP (fontmap));
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pango_context_set_base_gravity (klass->pango_context, PANGO_GRAVITY_SOUTH);
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if (klass->pango_lock)
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g_mutex_unlock (klass->pango_lock);
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}
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static void
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gst_base_text_overlay_class_init (GstBaseTextOverlayClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->finalize = gst_base_text_overlay_finalize;
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gobject_class->set_property = gst_base_text_overlay_set_property;
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gobject_class->get_property = gst_base_text_overlay_get_property;
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gst_element_class_add_static_pad_template (gstelement_class,
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&src_template_factory);
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gst_element_class_add_static_pad_template (gstelement_class,
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&video_sink_template_factory);
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_base_text_overlay_change_state);
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klass->pango_lock = g_slice_new (GMutex);
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g_mutex_init (klass->pango_lock);
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klass->get_text = gst_base_text_overlay_get_text;
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TEXT,
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g_param_spec_string ("text", "text",
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"Text to be display.", DEFAULT_PROP_TEXT,
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G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SHADING,
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g_param_spec_boolean ("shaded-background", "shaded background",
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"Whether to shade the background under the text area",
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DEFAULT_PROP_SHADING, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SHADING_VALUE,
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g_param_spec_uint ("shading-value", "background shading value",
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"Shading value to apply if shaded-background is true", 1, 255,
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DEFAULT_PROP_SHADING_VALUE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_VALIGNMENT,
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g_param_spec_enum ("valignment", "vertical alignment",
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"Vertical alignment of the text", GST_TYPE_BASE_TEXT_OVERLAY_VALIGN,
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DEFAULT_PROP_VALIGNMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_HALIGNMENT,
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g_param_spec_enum ("halignment", "horizontal alignment",
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"Horizontal alignment of the text", GST_TYPE_BASE_TEXT_OVERLAY_HALIGN,
|
|
DEFAULT_PROP_HALIGNMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_XPAD,
|
|
g_param_spec_int ("xpad", "horizontal paddding",
|
|
"Horizontal paddding when using left/right alignment", 0, G_MAXINT,
|
|
DEFAULT_PROP_XPAD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_YPAD,
|
|
g_param_spec_int ("ypad", "vertical padding",
|
|
"Vertical padding when using top/bottom alignment", 0, G_MAXINT,
|
|
DEFAULT_PROP_YPAD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DELTAX,
|
|
g_param_spec_int ("deltax", "X position modifier",
|
|
"Shift X position to the left or to the right. Unit is pixels.",
|
|
G_MININT, G_MAXINT, DEFAULT_PROP_DELTAX,
|
|
GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DELTAY,
|
|
g_param_spec_int ("deltay", "Y position modifier",
|
|
"Shift Y position up or down. Unit is pixels.",
|
|
G_MININT, G_MAXINT, DEFAULT_PROP_DELTAY,
|
|
GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstBaseTextOverlay:text-x:
|
|
*
|
|
* Resulting X position of font rendering.
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TEXT_X,
|
|
g_param_spec_int ("text-x", "horizontal position.",
|
|
"Resulting X position of font rendering.", -G_MAXINT,
|
|
G_MAXINT, DEFAULT_PROP_TEXT_X, G_PARAM_READABLE));
|
|
|
|
/**
|
|
* GstBaseTextOverlay:text-y:
|
|
*
|
|
* Resulting Y position of font rendering.
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TEXT_Y,
|
|
g_param_spec_int ("text-y", "vertical position",
|
|
"Resulting X position of font rendering.", -G_MAXINT,
|
|
G_MAXINT, DEFAULT_PROP_TEXT_Y, G_PARAM_READABLE));
|
|
|
|
/**
|
|
* GstBaseTextOverlay:text-width:
|
|
*
|
|
* Resulting width of font rendering.
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TEXT_WIDTH,
|
|
g_param_spec_uint ("text-width", "width",
|
|
"Resulting width of font rendering",
|
|
0, G_MAXINT, DEFAULT_PROP_TEXT_WIDTH, G_PARAM_READABLE));
|
|
|
|
/**
|
|
* GstBaseTextOverlay:text-height:
|
|
*
|
|
* Resulting height of font rendering.
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TEXT_HEIGHT,
|
|
g_param_spec_uint ("text-height", "height",
|
|
"Resulting height of font rendering", 0,
|
|
G_MAXINT, DEFAULT_PROP_TEXT_HEIGHT, G_PARAM_READABLE));
|
|
|
|
/**
|
|
* GstBaseTextOverlay:xpos:
|
|
*
|
|
* Horizontal position of the rendered text when using positioned alignment.
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_XPOS,
|
|
g_param_spec_double ("xpos", "horizontal position",
|
|
"Horizontal position when using clamped position alignment", 0, 1.0,
|
|
DEFAULT_PROP_XPOS,
|
|
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
|
|
/**
|
|
* GstBaseTextOverlay:ypos:
|
|
*
|
|
* Vertical position of the rendered text when using positioned alignment.
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_YPOS,
|
|
g_param_spec_double ("ypos", "vertical position",
|
|
"Vertical position when using clamped position alignment", 0, 1.0,
|
|
DEFAULT_PROP_YPOS,
|
|
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstBaseTextOverlay:x-absolute:
|
|
*
|
|
* Horizontal position of the rendered text when using absolute alignment.
|
|
*
|
|
* Maps the text area to be exactly inside of video canvas for [0, 0] - [1, 1]:
|
|
*
|
|
* [0, 0]: Top-Lefts of video and text are aligned
|
|
* [0.5, 0.5]: Centers are aligned
|
|
* [1, 1]: Bottom-Rights are aligned
|
|
*
|
|
* Values beyond [0, 0] - [1, 1] place the text outside of the video canvas.
|
|
*
|
|
* Since: 1.8
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_X_ABSOLUTE,
|
|
g_param_spec_double ("x-absolute", "horizontal position",
|
|
"Horizontal position when using absolute alignment", -G_MAXDOUBLE,
|
|
G_MAXDOUBLE, DEFAULT_PROP_XPOS,
|
|
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
|
|
/**
|
|
* GstBaseTextOverlay:y-absolute:
|
|
*
|
|
* See x-absolute.
|
|
*
|
|
* Vertical position of the rendered text when using absolute alignment.
|
|
*
|
|
* Since: 1.8
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_Y_ABSOLUTE,
|
|
g_param_spec_double ("y-absolute", "vertical position",
|
|
"Vertical position when using absolute alignment", -G_MAXDOUBLE,
|
|
G_MAXDOUBLE, DEFAULT_PROP_YPOS,
|
|
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
|
|
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_WRAP_MODE,
|
|
g_param_spec_enum ("wrap-mode", "wrap mode",
|
|
"Whether to wrap the text and if so how.",
|
|
GST_TYPE_BASE_TEXT_OVERLAY_WRAP_MODE, DEFAULT_PROP_WRAP_MODE,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FONT_DESC,
|
|
g_param_spec_string ("font-desc", "font description",
|
|
"Pango font description of font to be used for rendering. "
|
|
"See documentation of pango_font_description_from_string "
|
|
"for syntax.", DEFAULT_PROP_FONT_DESC,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
/**
|
|
* GstBaseTextOverlay:color:
|
|
*
|
|
* Color of the rendered text.
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_COLOR,
|
|
g_param_spec_uint ("color", "Color",
|
|
"Color to use for text (big-endian ARGB).", 0, G_MAXUINT32,
|
|
DEFAULT_PROP_COLOR,
|
|
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
|
|
/**
|
|
* GstTextOverlay:outline-color:
|
|
*
|
|
* Color of the outline of the rendered text.
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_OUTLINE_COLOR,
|
|
g_param_spec_uint ("outline-color", "Text Outline Color",
|
|
"Color to use for outline the text (big-endian ARGB).", 0,
|
|
G_MAXUINT32, DEFAULT_PROP_OUTLINE_COLOR,
|
|
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstBaseTextOverlay:line-alignment:
|
|
*
|
|
* Alignment of text lines relative to each other (for multi-line text)
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_LINE_ALIGNMENT,
|
|
g_param_spec_enum ("line-alignment", "line alignment",
|
|
"Alignment of text lines relative to each other.",
|
|
GST_TYPE_BASE_TEXT_OVERLAY_LINE_ALIGN, DEFAULT_PROP_LINE_ALIGNMENT,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
/**
|
|
* GstBaseTextOverlay:silent:
|
|
*
|
|
* If set, no text is rendered. Useful to switch off text rendering
|
|
* temporarily without removing the textoverlay element from the pipeline.
|
|
*/
|
|
/* FIXME 0.11: rename to "visible" or "text-visible" or "render-text" */
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SILENT,
|
|
g_param_spec_boolean ("silent", "silent",
|
|
"Whether to render the text string",
|
|
DEFAULT_PROP_SILENT,
|
|
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
|
|
/**
|
|
* GstBaseTextOverlay:draw-shadow:
|
|
*
|
|
* If set, a text shadow is drawn.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DRAW_SHADOW,
|
|
g_param_spec_boolean ("draw-shadow", "draw-shadow",
|
|
"Whether to draw shadow",
|
|
DEFAULT_PROP_DRAW_SHADOW,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
/**
|
|
* GstBaseTextOverlay:draw-outline:
|
|
*
|
|
* If set, an outline is drawn.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DRAW_OUTLINE,
|
|
g_param_spec_boolean ("draw-outline", "draw-outline",
|
|
"Whether to draw outline",
|
|
DEFAULT_PROP_DRAW_OUTLINE,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
/**
|
|
* GstBaseTextOverlay:wait-text:
|
|
*
|
|
* If set, the video will block until a subtitle is received on the text pad.
|
|
* If video and subtitles are sent in sync, like from the same demuxer, this
|
|
* property should be set.
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_WAIT_TEXT,
|
|
g_param_spec_boolean ("wait-text", "Wait Text",
|
|
"Whether to wait for subtitles",
|
|
DEFAULT_PROP_WAIT_TEXT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass),
|
|
PROP_AUTO_ADJUST_SIZE, g_param_spec_boolean ("auto-resize", "auto resize",
|
|
"Automatically adjust font size to screen-size.",
|
|
DEFAULT_PROP_AUTO_ADJUST_SIZE,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_VERTICAL_RENDER,
|
|
g_param_spec_boolean ("vertical-render", "vertical render",
|
|
"Vertical Render.", DEFAULT_PROP_VERTICAL_RENDER,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstBaseTextOverlay:scale-mode:
|
|
*
|
|
* Scale text to compensate for and avoid distortion by subsequent video scaling
|
|
*
|
|
* Since: 1.14
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SCALE_MODE,
|
|
g_param_spec_enum ("scale-mode", "scale mode",
|
|
"Scale text to compensate for and avoid distortion by subsequent video scaling.",
|
|
GST_TYPE_BASE_TEXT_OVERLAY_SCALE_MODE, DEFAULT_PROP_SCALE_MODE,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstBaseTextOverlay:scale-pixel-aspect-ratio:
|
|
*
|
|
* Video scaling pixel-aspect-ratio to compensate for in user scale-mode.
|
|
*
|
|
* Since: 1.14
|
|
*/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SCALE_PAR,
|
|
gst_param_spec_fraction ("scale-pixel-aspect-ratio",
|
|
"scale pixel aspect ratio",
|
|
"Pixel aspect ratio of video scale to compensate for in user scale-mode",
|
|
1, 100, 100, 1, DEFAULT_PROP_SCALE_PAR_N, DEFAULT_PROP_SCALE_PAR_D,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
}
|
|
|
|
static void
|
|
gst_base_text_overlay_finalize (GObject * object)
|
|
{
|
|
GstBaseTextOverlay *overlay = GST_BASE_TEXT_OVERLAY (object);
|
|
|
|
g_free (overlay->default_text);
|
|
|
|
if (overlay->composition) {
|
|
gst_video_overlay_composition_unref (overlay->composition);
|
|
overlay->composition = NULL;
|
|
}
|
|
|
|
if (overlay->text_image) {
|
|
gst_buffer_unref (overlay->text_image);
|
|
overlay->text_image = NULL;
|
|
}
|
|
|
|
if (overlay->layout) {
|
|
g_object_unref (overlay->layout);
|
|
overlay->layout = NULL;
|
|
}
|
|
|
|
if (overlay->text_buffer) {
|
|
gst_buffer_unref (overlay->text_buffer);
|
|
overlay->text_buffer = NULL;
|
|
}
|
|
|
|
g_mutex_clear (&overlay->lock);
|
|
g_cond_clear (&overlay->cond);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static void
|
|
gst_base_text_overlay_init (GstBaseTextOverlay * overlay,
|
|
GstBaseTextOverlayClass * klass)
|
|
{
|
|
GstPadTemplate *template;
|
|
PangoFontDescription *desc;
|
|
|
|
/* video sink */
|
|
template = gst_static_pad_template_get (&video_sink_template_factory);
|
|
overlay->video_sinkpad = gst_pad_new_from_template (template, "video_sink");
|
|
gst_object_unref (template);
|
|
gst_pad_set_event_function (overlay->video_sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_text_overlay_video_event));
|
|
gst_pad_set_chain_function (overlay->video_sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_text_overlay_video_chain));
|
|
gst_pad_set_query_function (overlay->video_sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_text_overlay_video_query));
|
|
GST_PAD_SET_PROXY_ALLOCATION (overlay->video_sinkpad);
|
|
gst_element_add_pad (GST_ELEMENT (overlay), overlay->video_sinkpad);
|
|
|
|
template =
|
|
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass),
|
|
"text_sink");
|
|
if (template) {
|
|
/* text sink */
|
|
overlay->text_sinkpad = gst_pad_new_from_template (template, "text_sink");
|
|
|
|
gst_pad_set_event_function (overlay->text_sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_text_overlay_text_event));
|
|
gst_pad_set_chain_function (overlay->text_sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_text_overlay_text_chain));
|
|
gst_pad_set_link_function (overlay->text_sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_text_overlay_text_pad_link));
|
|
gst_pad_set_unlink_function (overlay->text_sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_text_overlay_text_pad_unlink));
|
|
gst_element_add_pad (GST_ELEMENT (overlay), overlay->text_sinkpad);
|
|
}
|
|
|
|
/* (video) source */
|
|
template = gst_static_pad_template_get (&src_template_factory);
|
|
overlay->srcpad = gst_pad_new_from_template (template, "src");
|
|
gst_object_unref (template);
|
|
gst_pad_set_event_function (overlay->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_text_overlay_src_event));
|
|
gst_pad_set_query_function (overlay->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_text_overlay_src_query));
|
|
gst_element_add_pad (GST_ELEMENT (overlay), overlay->srcpad);
|
|
|
|
g_mutex_lock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
overlay->layout =
|
|
pango_layout_new (GST_BASE_TEXT_OVERLAY_GET_CLASS
|
|
(overlay)->pango_context);
|
|
desc =
|
|
pango_context_get_font_description (GST_BASE_TEXT_OVERLAY_GET_CLASS
|
|
(overlay)->pango_context);
|
|
gst_base_text_overlay_adjust_values_with_fontdesc (overlay, desc);
|
|
|
|
overlay->color = DEFAULT_PROP_COLOR;
|
|
overlay->outline_color = DEFAULT_PROP_OUTLINE_COLOR;
|
|
overlay->halign = DEFAULT_PROP_HALIGNMENT;
|
|
overlay->valign = DEFAULT_PROP_VALIGNMENT;
|
|
overlay->xpad = DEFAULT_PROP_XPAD;
|
|
overlay->ypad = DEFAULT_PROP_YPAD;
|
|
overlay->deltax = DEFAULT_PROP_DELTAX;
|
|
overlay->deltay = DEFAULT_PROP_DELTAY;
|
|
overlay->xpos = DEFAULT_PROP_XPOS;
|
|
overlay->ypos = DEFAULT_PROP_YPOS;
|
|
|
|
overlay->wrap_mode = DEFAULT_PROP_WRAP_MODE;
|
|
|
|
overlay->want_shading = DEFAULT_PROP_SHADING;
|
|
overlay->shading_value = DEFAULT_PROP_SHADING_VALUE;
|
|
overlay->silent = DEFAULT_PROP_SILENT;
|
|
overlay->draw_shadow = DEFAULT_PROP_DRAW_SHADOW;
|
|
overlay->draw_outline = DEFAULT_PROP_DRAW_OUTLINE;
|
|
overlay->wait_text = DEFAULT_PROP_WAIT_TEXT;
|
|
overlay->auto_adjust_size = DEFAULT_PROP_AUTO_ADJUST_SIZE;
|
|
|
|
overlay->default_text = g_strdup (DEFAULT_PROP_TEXT);
|
|
overlay->need_render = TRUE;
|
|
overlay->text_image = NULL;
|
|
overlay->use_vertical_render = DEFAULT_PROP_VERTICAL_RENDER;
|
|
overlay->scale_mode = DEFAULT_PROP_SCALE_MODE;
|
|
overlay->scale_par_n = DEFAULT_PROP_SCALE_PAR_N;
|
|
overlay->scale_par_d = DEFAULT_PROP_SCALE_PAR_D;
|
|
|
|
overlay->line_align = DEFAULT_PROP_LINE_ALIGNMENT;
|
|
pango_layout_set_alignment (overlay->layout,
|
|
(PangoAlignment) overlay->line_align);
|
|
|
|
overlay->text_buffer = NULL;
|
|
overlay->text_linked = FALSE;
|
|
|
|
overlay->composition = NULL;
|
|
overlay->upstream_composition = NULL;
|
|
|
|
overlay->width = 1;
|
|
overlay->height = 1;
|
|
|
|
overlay->window_width = 1;
|
|
overlay->window_height = 1;
|
|
|
|
overlay->text_width = DEFAULT_PROP_TEXT_WIDTH;
|
|
overlay->text_height = DEFAULT_PROP_TEXT_HEIGHT;
|
|
|
|
overlay->text_x = DEFAULT_PROP_TEXT_X;
|
|
overlay->text_y = DEFAULT_PROP_TEXT_Y;
|
|
|
|
overlay->render_width = 1;
|
|
overlay->render_height = 1;
|
|
overlay->render_scale = 1.0l;
|
|
|
|
g_mutex_init (&overlay->lock);
|
|
g_cond_init (&overlay->cond);
|
|
gst_segment_init (&overlay->segment, GST_FORMAT_TIME);
|
|
g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
}
|
|
|
|
static void
|
|
gst_base_text_overlay_set_wrap_mode (GstBaseTextOverlay * overlay, gint width)
|
|
{
|
|
if (overlay->wrap_mode == GST_BASE_TEXT_OVERLAY_WRAP_MODE_NONE) {
|
|
GST_DEBUG_OBJECT (overlay, "Set wrap mode NONE");
|
|
pango_layout_set_width (overlay->layout, -1);
|
|
} else {
|
|
width = width * PANGO_SCALE;
|
|
|
|
GST_DEBUG_OBJECT (overlay, "Set layout width %d", width);
|
|
GST_DEBUG_OBJECT (overlay, "Set wrap mode %d", overlay->wrap_mode);
|
|
pango_layout_set_width (overlay->layout, width);
|
|
}
|
|
|
|
pango_layout_set_wrap (overlay->layout, (PangoWrapMode) overlay->wrap_mode);
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_text_overlay_setcaps_txt (GstBaseTextOverlay * overlay, GstCaps * caps)
|
|
{
|
|
GstStructure *structure;
|
|
const gchar *format;
|
|
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
format = gst_structure_get_string (structure, "format");
|
|
overlay->have_pango_markup = (strcmp (format, "pango-markup") == 0);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* only negotiate/query video overlay composition support for now */
|
|
static gboolean
|
|
gst_base_text_overlay_negotiate (GstBaseTextOverlay * overlay, GstCaps * caps)
|
|
{
|
|
gboolean upstream_has_meta = FALSE;
|
|
gboolean caps_has_meta = FALSE;
|
|
gboolean alloc_has_meta = FALSE;
|
|
gboolean attach = FALSE;
|
|
gboolean ret = TRUE;
|
|
guint width, height;
|
|
GstCapsFeatures *f;
|
|
GstCaps *overlay_caps;
|
|
GstQuery *query;
|
|
guint alloc_index;
|
|
|
|
GST_DEBUG_OBJECT (overlay, "performing negotiation");
|
|
|
|
/* Clear any pending reconfigure to avoid negotiating twice */
|
|
gst_pad_check_reconfigure (overlay->srcpad);
|
|
|
|
if (!caps)
|
|
caps = gst_pad_get_current_caps (overlay->video_sinkpad);
|
|
else
|
|
gst_caps_ref (caps);
|
|
|
|
if (!caps || gst_caps_is_empty (caps))
|
|
goto no_format;
|
|
|
|
/* Check if upstream caps have meta */
|
|
if ((f = gst_caps_get_features (caps, 0))) {
|
|
upstream_has_meta = gst_caps_features_contains (f,
|
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION);
|
|
}
|
|
|
|
/* Initialize dimensions */
|
|
width = overlay->width;
|
|
height = overlay->height;
|
|
|
|
if (upstream_has_meta) {
|
|
overlay_caps = gst_caps_ref (caps);
|
|
} else {
|
|
GstCaps *peercaps;
|
|
|
|
/* BaseTransform requires caps for the allocation query to work */
|
|
overlay_caps = gst_caps_copy (caps);
|
|
f = gst_caps_get_features (overlay_caps, 0);
|
|
gst_caps_features_add (f,
|
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION);
|
|
|
|
/* Then check if downstream accept overlay composition in caps */
|
|
/* FIXME: We should probably check if downstream *prefers* the
|
|
* overlay meta, and only enforce usage of it if we can't handle
|
|
* the format ourselves and thus would have to drop the overlays.
|
|
* Otherwise we should prefer what downstream wants here.
|
|
*/
|
|
peercaps = gst_pad_peer_query_caps (overlay->srcpad, NULL);
|
|
caps_has_meta = gst_caps_can_intersect (peercaps, overlay_caps);
|
|
gst_caps_unref (peercaps);
|
|
|
|
GST_DEBUG ("caps have overlay meta %d", caps_has_meta);
|
|
}
|
|
|
|
if (upstream_has_meta || caps_has_meta) {
|
|
/* Send caps immediatly, it's needed by GstBaseTransform to get a reply
|
|
* from allocation query */
|
|
ret = gst_pad_set_caps (overlay->srcpad, overlay_caps);
|
|
|
|
/* First check if the allocation meta has compositon */
|
|
query = gst_query_new_allocation (overlay_caps, FALSE);
|
|
|
|
if (!gst_pad_peer_query (overlay->srcpad, query)) {
|
|
/* no problem, we use the query defaults */
|
|
GST_DEBUG_OBJECT (overlay, "ALLOCATION query failed");
|
|
|
|
/* In case we were flushing, mark reconfigure and fail this method,
|
|
* will make it retry */
|
|
if (overlay->video_flushing)
|
|
ret = FALSE;
|
|
}
|
|
|
|
alloc_has_meta = gst_query_find_allocation_meta (query,
|
|
GST_VIDEO_OVERLAY_COMPOSITION_META_API_TYPE, &alloc_index);
|
|
|
|
GST_DEBUG ("sink alloc has overlay meta %d", alloc_has_meta);
|
|
|
|
if (alloc_has_meta) {
|
|
const GstStructure *params;
|
|
|
|
gst_query_parse_nth_allocation_meta (query, alloc_index, ¶ms);
|
|
if (params) {
|
|
if (gst_structure_get (params, "width", G_TYPE_UINT, &width,
|
|
"height", G_TYPE_UINT, &height, NULL)) {
|
|
GST_DEBUG ("received window size: %dx%d", width, height);
|
|
g_assert (width != 0 && height != 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
gst_query_unref (query);
|
|
}
|
|
|
|
/* Update render size if needed */
|
|
overlay->window_width = width;
|
|
overlay->window_height = height;
|
|
gst_base_text_overlay_update_render_size (overlay);
|
|
|
|
/* For backward compatbility, we will prefer bliting if downstream
|
|
* allocation does not support the meta. In other case we will prefer
|
|
* attaching, and will fail the negotiation in the unlikely case we are
|
|
* force to blit, but format isn't supported. */
|
|
|
|
if (upstream_has_meta) {
|
|
attach = TRUE;
|
|
} else if (caps_has_meta) {
|
|
if (alloc_has_meta) {
|
|
attach = TRUE;
|
|
} else {
|
|
/* Don't attach unless we cannot handle the format */
|
|
attach = !gst_base_text_overlay_can_handle_caps (caps);
|
|
}
|
|
} else {
|
|
ret = gst_base_text_overlay_can_handle_caps (caps);
|
|
}
|
|
|
|
/* If we attach, then pick the overlay caps */
|
|
if (attach) {
|
|
GST_DEBUG_OBJECT (overlay, "Using caps %" GST_PTR_FORMAT, overlay_caps);
|
|
/* Caps where already sent */
|
|
} else if (ret) {
|
|
GST_DEBUG_OBJECT (overlay, "Using caps %" GST_PTR_FORMAT, caps);
|
|
ret = gst_pad_set_caps (overlay->srcpad, caps);
|
|
}
|
|
|
|
overlay->attach_compo_to_buffer = attach;
|
|
|
|
if (!ret) {
|
|
GST_DEBUG_OBJECT (overlay, "negotiation failed, schedule reconfigure");
|
|
gst_pad_mark_reconfigure (overlay->srcpad);
|
|
}
|
|
|
|
gst_caps_unref (overlay_caps);
|
|
gst_caps_unref (caps);
|
|
|
|
if (!ret)
|
|
gst_pad_mark_reconfigure (overlay->srcpad);
|
|
|
|
return ret;
|
|
|
|
no_format:
|
|
{
|
|
if (caps)
|
|
gst_caps_unref (caps);
|
|
gst_pad_mark_reconfigure (overlay->srcpad);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_text_overlay_can_handle_caps (GstCaps * incaps)
|
|
{
|
|
gboolean ret;
|
|
GstCaps *caps;
|
|
static GstStaticCaps static_caps = GST_STATIC_CAPS (BASE_TEXT_OVERLAY_CAPS);
|
|
|
|
caps = gst_static_caps_get (&static_caps);
|
|
ret = gst_caps_is_subset (incaps, caps);
|
|
gst_caps_unref (caps);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_text_overlay_setcaps (GstBaseTextOverlay * overlay, GstCaps * caps)
|
|
{
|
|
GstVideoInfo info;
|
|
gboolean ret = FALSE;
|
|
|
|
if (!gst_video_info_from_caps (&info, caps))
|
|
goto invalid_caps;
|
|
|
|
/* Render again if size have changed */
|
|
if (GST_VIDEO_INFO_WIDTH (&info) != GST_VIDEO_INFO_WIDTH (&overlay->info) ||
|
|
GST_VIDEO_INFO_HEIGHT (&info) != GST_VIDEO_INFO_HEIGHT (&overlay->info))
|
|
overlay->need_render = TRUE;
|
|
|
|
overlay->info = info;
|
|
overlay->format = GST_VIDEO_INFO_FORMAT (&info);
|
|
overlay->width = GST_VIDEO_INFO_WIDTH (&info);
|
|
overlay->height = GST_VIDEO_INFO_HEIGHT (&info);
|
|
|
|
ret = gst_base_text_overlay_negotiate (overlay, caps);
|
|
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
|
|
if (!overlay->attach_compo_to_buffer &&
|
|
!gst_base_text_overlay_can_handle_caps (caps)) {
|
|
GST_DEBUG_OBJECT (overlay, "unsupported caps %" GST_PTR_FORMAT, caps);
|
|
ret = FALSE;
|
|
}
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
invalid_caps:
|
|
{
|
|
GST_DEBUG_OBJECT (overlay, "could not parse caps");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_base_text_overlay_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstBaseTextOverlay *overlay = GST_BASE_TEXT_OVERLAY (object);
|
|
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
switch (prop_id) {
|
|
case PROP_TEXT:
|
|
g_free (overlay->default_text);
|
|
overlay->default_text = g_value_dup_string (value);
|
|
break;
|
|
case PROP_SHADING:
|
|
overlay->want_shading = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_XPAD:
|
|
overlay->xpad = g_value_get_int (value);
|
|
break;
|
|
case PROP_YPAD:
|
|
overlay->ypad = g_value_get_int (value);
|
|
break;
|
|
case PROP_DELTAX:
|
|
overlay->deltax = g_value_get_int (value);
|
|
break;
|
|
case PROP_DELTAY:
|
|
overlay->deltay = g_value_get_int (value);
|
|
break;
|
|
case PROP_XPOS:
|
|
overlay->xpos = g_value_get_double (value);
|
|
break;
|
|
case PROP_YPOS:
|
|
overlay->ypos = g_value_get_double (value);
|
|
break;
|
|
case PROP_X_ABSOLUTE:
|
|
overlay->xpos = g_value_get_double (value);
|
|
break;
|
|
case PROP_Y_ABSOLUTE:
|
|
overlay->ypos = g_value_get_double (value);
|
|
break;
|
|
case PROP_VALIGNMENT:
|
|
overlay->valign = g_value_get_enum (value);
|
|
break;
|
|
case PROP_HALIGNMENT:
|
|
overlay->halign = g_value_get_enum (value);
|
|
break;
|
|
case PROP_WRAP_MODE:
|
|
overlay->wrap_mode = g_value_get_enum (value);
|
|
break;
|
|
case PROP_FONT_DESC:
|
|
{
|
|
PangoFontDescription *desc;
|
|
const gchar *fontdesc_str;
|
|
|
|
fontdesc_str = g_value_get_string (value);
|
|
g_mutex_lock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
desc = pango_font_description_from_string (fontdesc_str);
|
|
if (desc) {
|
|
GST_LOG_OBJECT (overlay, "font description set: %s", fontdesc_str);
|
|
pango_layout_set_font_description (overlay->layout, desc);
|
|
gst_base_text_overlay_adjust_values_with_fontdesc (overlay, desc);
|
|
pango_font_description_free (desc);
|
|
} else {
|
|
GST_WARNING_OBJECT (overlay, "font description parse failed: %s",
|
|
fontdesc_str);
|
|
}
|
|
g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
break;
|
|
}
|
|
case PROP_COLOR:
|
|
overlay->color = g_value_get_uint (value);
|
|
break;
|
|
case PROP_OUTLINE_COLOR:
|
|
overlay->outline_color = g_value_get_uint (value);
|
|
break;
|
|
case PROP_SILENT:
|
|
overlay->silent = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_DRAW_SHADOW:
|
|
overlay->draw_shadow = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_DRAW_OUTLINE:
|
|
overlay->draw_outline = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_LINE_ALIGNMENT:
|
|
overlay->line_align = g_value_get_enum (value);
|
|
g_mutex_lock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
pango_layout_set_alignment (overlay->layout,
|
|
(PangoAlignment) overlay->line_align);
|
|
g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
break;
|
|
case PROP_WAIT_TEXT:
|
|
overlay->wait_text = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_AUTO_ADJUST_SIZE:
|
|
overlay->auto_adjust_size = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_VERTICAL_RENDER:
|
|
overlay->use_vertical_render = g_value_get_boolean (value);
|
|
if (overlay->use_vertical_render) {
|
|
overlay->valign = GST_BASE_TEXT_OVERLAY_VALIGN_TOP;
|
|
overlay->halign = GST_BASE_TEXT_OVERLAY_HALIGN_RIGHT;
|
|
overlay->line_align = GST_BASE_TEXT_OVERLAY_LINE_ALIGN_LEFT;
|
|
g_mutex_lock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
pango_layout_set_alignment (overlay->layout,
|
|
(PangoAlignment) overlay->line_align);
|
|
g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
}
|
|
break;
|
|
case PROP_SCALE_MODE:
|
|
overlay->scale_mode = g_value_get_enum (value);
|
|
break;
|
|
case PROP_SCALE_PAR:
|
|
overlay->scale_par_n = gst_value_get_fraction_numerator (value);
|
|
overlay->scale_par_d = gst_value_get_fraction_denominator (value);
|
|
break;
|
|
case PROP_SHADING_VALUE:
|
|
overlay->shading_value = g_value_get_uint (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
|
|
overlay->need_render = TRUE;
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
}
|
|
|
|
static void
|
|
gst_base_text_overlay_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstBaseTextOverlay *overlay = GST_BASE_TEXT_OVERLAY (object);
|
|
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
switch (prop_id) {
|
|
case PROP_TEXT:
|
|
g_value_set_string (value, overlay->default_text);
|
|
break;
|
|
case PROP_SHADING:
|
|
g_value_set_boolean (value, overlay->want_shading);
|
|
break;
|
|
case PROP_XPAD:
|
|
g_value_set_int (value, overlay->xpad);
|
|
break;
|
|
case PROP_YPAD:
|
|
g_value_set_int (value, overlay->ypad);
|
|
break;
|
|
case PROP_DELTAX:
|
|
g_value_set_int (value, overlay->deltax);
|
|
break;
|
|
case PROP_DELTAY:
|
|
g_value_set_int (value, overlay->deltay);
|
|
break;
|
|
case PROP_XPOS:
|
|
g_value_set_double (value, overlay->xpos);
|
|
break;
|
|
case PROP_YPOS:
|
|
g_value_set_double (value, overlay->ypos);
|
|
break;
|
|
case PROP_X_ABSOLUTE:
|
|
g_value_set_double (value, overlay->xpos);
|
|
break;
|
|
case PROP_Y_ABSOLUTE:
|
|
g_value_set_double (value, overlay->ypos);
|
|
break;
|
|
case PROP_VALIGNMENT:
|
|
g_value_set_enum (value, overlay->valign);
|
|
break;
|
|
case PROP_HALIGNMENT:
|
|
g_value_set_enum (value, overlay->halign);
|
|
break;
|
|
case PROP_WRAP_MODE:
|
|
g_value_set_enum (value, overlay->wrap_mode);
|
|
break;
|
|
case PROP_SILENT:
|
|
g_value_set_boolean (value, overlay->silent);
|
|
break;
|
|
case PROP_DRAW_SHADOW:
|
|
g_value_set_boolean (value, overlay->draw_shadow);
|
|
break;
|
|
case PROP_DRAW_OUTLINE:
|
|
g_value_set_boolean (value, overlay->draw_outline);
|
|
break;
|
|
case PROP_LINE_ALIGNMENT:
|
|
g_value_set_enum (value, overlay->line_align);
|
|
break;
|
|
case PROP_WAIT_TEXT:
|
|
g_value_set_boolean (value, overlay->wait_text);
|
|
break;
|
|
case PROP_AUTO_ADJUST_SIZE:
|
|
g_value_set_boolean (value, overlay->auto_adjust_size);
|
|
break;
|
|
case PROP_VERTICAL_RENDER:
|
|
g_value_set_boolean (value, overlay->use_vertical_render);
|
|
break;
|
|
case PROP_SCALE_MODE:
|
|
g_value_set_enum (value, overlay->scale_mode);
|
|
break;
|
|
case PROP_SCALE_PAR:
|
|
gst_value_set_fraction (value, overlay->scale_par_n,
|
|
overlay->scale_par_d);
|
|
break;
|
|
case PROP_COLOR:
|
|
g_value_set_uint (value, overlay->color);
|
|
break;
|
|
case PROP_OUTLINE_COLOR:
|
|
g_value_set_uint (value, overlay->outline_color);
|
|
break;
|
|
case PROP_SHADING_VALUE:
|
|
g_value_set_uint (value, overlay->shading_value);
|
|
break;
|
|
case PROP_FONT_DESC:
|
|
{
|
|
const PangoFontDescription *desc;
|
|
|
|
g_mutex_lock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
desc = pango_layout_get_font_description (overlay->layout);
|
|
if (!desc)
|
|
g_value_set_string (value, "");
|
|
else {
|
|
g_value_take_string (value, pango_font_description_to_string (desc));
|
|
}
|
|
g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
break;
|
|
}
|
|
case PROP_TEXT_X:
|
|
g_value_set_int (value, overlay->text_x);
|
|
break;
|
|
case PROP_TEXT_Y:
|
|
g_value_set_int (value, overlay->text_y);
|
|
break;
|
|
case PROP_TEXT_WIDTH:
|
|
g_value_set_uint (value, overlay->text_width);
|
|
break;
|
|
case PROP_TEXT_HEIGHT:
|
|
g_value_set_uint (value, overlay->text_height);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
|
|
overlay->need_render = TRUE;
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_text_overlay_src_query (GstPad * pad, GstObject * parent,
|
|
GstQuery * query)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstBaseTextOverlay *overlay;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (parent);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_CAPS:
|
|
{
|
|
GstCaps *filter, *caps;
|
|
|
|
gst_query_parse_caps (query, &filter);
|
|
caps = gst_base_text_overlay_get_src_caps (pad, overlay, filter);
|
|
gst_query_set_caps_result (query, caps);
|
|
gst_caps_unref (caps);
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
default:
|
|
ret = gst_pad_query_default (pad, parent, query);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_base_text_overlay_update_render_size (GstBaseTextOverlay * overlay)
|
|
{
|
|
gdouble video_aspect = (gdouble) overlay->width / (gdouble) overlay->height;
|
|
gdouble window_aspect = (gdouble) overlay->window_width /
|
|
(gdouble) 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;
|
|
}
|
|
|
|
if ((overlay->render_width == text_buffer_width) &&
|
|
(overlay->render_height == text_buffer_height))
|
|
return;
|
|
|
|
overlay->need_render = TRUE;
|
|
overlay->render_width = text_buffer_width;
|
|
overlay->render_height = text_buffer_height;
|
|
overlay->render_scale = (gdouble) overlay->render_width /
|
|
(gdouble) overlay->width;
|
|
|
|
GST_DEBUG ("updating render dimensions %dx%d from stream %dx%d, window %dx%d "
|
|
"and render scale %f", overlay->render_width, overlay->render_height,
|
|
overlay->width, overlay->height, overlay->window_width,
|
|
overlay->window_height, overlay->render_scale);
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_text_overlay_src_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event)
|
|
{
|
|
GstBaseTextOverlay *overlay;
|
|
gboolean ret;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (parent);
|
|
|
|
if (overlay->text_linked) {
|
|
gst_event_ref (event);
|
|
ret = gst_pad_push_event (overlay->video_sinkpad, event);
|
|
gst_pad_push_event (overlay->text_sinkpad, event);
|
|
} else {
|
|
ret = gst_pad_push_event (overlay->video_sinkpad, event);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_base_text_overlay_add_feature_and_intersect:
|
|
*
|
|
* Creates a new #GstCaps containing the (given caps +
|
|
* given caps feature) + (given caps intersected by the
|
|
* given filter).
|
|
*
|
|
* Returns: the new #GstCaps
|
|
*/
|
|
static GstCaps *
|
|
gst_base_text_overlay_add_feature_and_intersect (GstCaps * caps,
|
|
const gchar * feature, GstCaps * filter)
|
|
{
|
|
int i, caps_size;
|
|
GstCaps *new_caps;
|
|
|
|
new_caps = gst_caps_copy (caps);
|
|
|
|
caps_size = gst_caps_get_size (new_caps);
|
|
for (i = 0; i < caps_size; i++) {
|
|
GstCapsFeatures *features = gst_caps_get_features (new_caps, i);
|
|
|
|
if (!gst_caps_features_is_any (features)) {
|
|
gst_caps_features_add (features, feature);
|
|
}
|
|
}
|
|
|
|
gst_caps_append (new_caps, gst_caps_intersect_full (caps,
|
|
filter, GST_CAPS_INTERSECT_FIRST));
|
|
|
|
return new_caps;
|
|
}
|
|
|
|
/**
|
|
* gst_base_text_overlay_intersect_by_feature:
|
|
*
|
|
* Creates a new #GstCaps based on the following filtering rule.
|
|
*
|
|
* For each individual caps contained in given caps, if the
|
|
* caps uses the given caps feature, keep a version of the caps
|
|
* with the feature and an another one without. Otherwise, intersect
|
|
* the caps with the given filter.
|
|
*
|
|
* Returns: the new #GstCaps
|
|
*/
|
|
static GstCaps *
|
|
gst_base_text_overlay_intersect_by_feature (GstCaps * caps,
|
|
const gchar * feature, GstCaps * filter)
|
|
{
|
|
int i, caps_size;
|
|
GstCaps *new_caps;
|
|
|
|
new_caps = gst_caps_new_empty ();
|
|
|
|
caps_size = gst_caps_get_size (caps);
|
|
for (i = 0; i < caps_size; i++) {
|
|
GstStructure *caps_structure = gst_caps_get_structure (caps, i);
|
|
GstCapsFeatures *caps_features =
|
|
gst_caps_features_copy (gst_caps_get_features (caps, i));
|
|
GstCaps *filtered_caps;
|
|
GstCaps *simple_caps =
|
|
gst_caps_new_full (gst_structure_copy (caps_structure), NULL);
|
|
gst_caps_set_features (simple_caps, 0, caps_features);
|
|
|
|
if (gst_caps_features_contains (caps_features, feature)) {
|
|
gst_caps_append (new_caps, gst_caps_copy (simple_caps));
|
|
|
|
gst_caps_features_remove (caps_features, feature);
|
|
filtered_caps = gst_caps_ref (simple_caps);
|
|
} else {
|
|
filtered_caps = gst_caps_intersect_full (simple_caps, filter,
|
|
GST_CAPS_INTERSECT_FIRST);
|
|
}
|
|
|
|
gst_caps_unref (simple_caps);
|
|
gst_caps_append (new_caps, filtered_caps);
|
|
}
|
|
|
|
return new_caps;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_base_text_overlay_get_videosink_caps (GstPad * pad,
|
|
GstBaseTextOverlay * overlay, GstCaps * filter)
|
|
{
|
|
GstPad *srcpad = overlay->srcpad;
|
|
GstCaps *peer_caps = NULL, *caps = NULL, *overlay_filter = NULL;
|
|
|
|
if (G_UNLIKELY (!overlay))
|
|
return gst_pad_get_pad_template_caps (pad);
|
|
|
|
if (filter) {
|
|
/* filter caps + composition feature + filter caps
|
|
* filtered by the software caps. */
|
|
GstCaps *sw_caps = gst_static_caps_get (&sw_template_caps);
|
|
overlay_filter = gst_base_text_overlay_add_feature_and_intersect (filter,
|
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION, sw_caps);
|
|
gst_caps_unref (sw_caps);
|
|
|
|
GST_DEBUG_OBJECT (overlay, "overlay filter %" GST_PTR_FORMAT,
|
|
overlay_filter);
|
|
}
|
|
|
|
peer_caps = gst_pad_peer_query_caps (srcpad, overlay_filter);
|
|
|
|
if (overlay_filter)
|
|
gst_caps_unref (overlay_filter);
|
|
|
|
if (peer_caps) {
|
|
|
|
GST_DEBUG_OBJECT (pad, "peer caps %" GST_PTR_FORMAT, peer_caps);
|
|
|
|
if (gst_caps_is_any (peer_caps)) {
|
|
/* if peer returns ANY caps, return filtered src pad template caps */
|
|
caps = gst_caps_copy (gst_pad_get_pad_template_caps (srcpad));
|
|
} else {
|
|
|
|
/* duplicate caps which contains the composition into one version with
|
|
* the meta and one without. Filter the other caps by the software caps */
|
|
GstCaps *sw_caps = gst_static_caps_get (&sw_template_caps);
|
|
caps = gst_base_text_overlay_intersect_by_feature (peer_caps,
|
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION, sw_caps);
|
|
gst_caps_unref (sw_caps);
|
|
}
|
|
|
|
gst_caps_unref (peer_caps);
|
|
|
|
} else {
|
|
/* no peer, our padtemplate is enough then */
|
|
caps = gst_pad_get_pad_template_caps (pad);
|
|
}
|
|
|
|
if (filter) {
|
|
GstCaps *intersection = gst_caps_intersect_full (filter, caps,
|
|
GST_CAPS_INTERSECT_FIRST);
|
|
gst_caps_unref (caps);
|
|
caps = intersection;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (overlay, "returning %" GST_PTR_FORMAT, caps);
|
|
|
|
return caps;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_base_text_overlay_get_src_caps (GstPad * pad, GstBaseTextOverlay * overlay,
|
|
GstCaps * filter)
|
|
{
|
|
GstPad *sinkpad = overlay->video_sinkpad;
|
|
GstCaps *peer_caps = NULL, *caps = NULL, *overlay_filter = NULL;
|
|
|
|
if (G_UNLIKELY (!overlay))
|
|
return gst_pad_get_pad_template_caps (pad);
|
|
|
|
if (filter) {
|
|
/* duplicate filter caps which contains the composition into one version
|
|
* with the meta and one without. Filter the other caps by the software
|
|
* caps */
|
|
GstCaps *sw_caps = gst_static_caps_get (&sw_template_caps);
|
|
overlay_filter =
|
|
gst_base_text_overlay_intersect_by_feature (filter,
|
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION, sw_caps);
|
|
gst_caps_unref (sw_caps);
|
|
}
|
|
|
|
peer_caps = gst_pad_peer_query_caps (sinkpad, overlay_filter);
|
|
|
|
if (overlay_filter)
|
|
gst_caps_unref (overlay_filter);
|
|
|
|
if (peer_caps) {
|
|
|
|
GST_DEBUG_OBJECT (pad, "peer caps %" GST_PTR_FORMAT, peer_caps);
|
|
|
|
if (gst_caps_is_any (peer_caps)) {
|
|
|
|
/* if peer returns ANY caps, return filtered sink pad template caps */
|
|
caps = gst_caps_copy (gst_pad_get_pad_template_caps (sinkpad));
|
|
|
|
} else {
|
|
|
|
/* return upstream caps + composition feature + upstream caps
|
|
* filtered by the software caps. */
|
|
GstCaps *sw_caps = gst_static_caps_get (&sw_template_caps);
|
|
caps = gst_base_text_overlay_add_feature_and_intersect (peer_caps,
|
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION, sw_caps);
|
|
gst_caps_unref (sw_caps);
|
|
}
|
|
|
|
gst_caps_unref (peer_caps);
|
|
|
|
} else {
|
|
/* no peer, our padtemplate is enough then */
|
|
caps = gst_pad_get_pad_template_caps (pad);
|
|
}
|
|
|
|
if (filter) {
|
|
GstCaps *intersection;
|
|
|
|
intersection =
|
|
gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
|
|
gst_caps_unref (caps);
|
|
caps = intersection;
|
|
}
|
|
GST_DEBUG_OBJECT (overlay, "returning %" GST_PTR_FORMAT, caps);
|
|
|
|
return caps;
|
|
}
|
|
|
|
static void
|
|
gst_base_text_overlay_adjust_values_with_fontdesc (GstBaseTextOverlay * overlay,
|
|
PangoFontDescription * desc)
|
|
{
|
|
gint font_size = pango_font_description_get_size (desc) / PANGO_SCALE;
|
|
overlay->shadow_offset = (double) (font_size) / 13.0;
|
|
overlay->outline_offset = (double) (font_size) / 15.0;
|
|
if (overlay->outline_offset < MINIMUM_OUTLINE_OFFSET)
|
|
overlay->outline_offset = MINIMUM_OUTLINE_OFFSET;
|
|
}
|
|
|
|
static void
|
|
gst_base_text_overlay_get_pos (GstBaseTextOverlay * overlay,
|
|
gint * xpos, gint * ypos)
|
|
{
|
|
gint width, height;
|
|
|
|
width = overlay->logical_rect.width;
|
|
height = overlay->logical_rect.height;
|
|
|
|
*xpos = overlay->ink_rect.x - overlay->logical_rect.x;
|
|
switch (overlay->halign) {
|
|
case GST_BASE_TEXT_OVERLAY_HALIGN_LEFT:
|
|
*xpos += overlay->xpad;
|
|
*xpos = MAX (0, *xpos);
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_HALIGN_CENTER:
|
|
*xpos += (overlay->width - width) / 2;
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_HALIGN_RIGHT:
|
|
*xpos += overlay->width - width - overlay->xpad;
|
|
*xpos = MIN (overlay->width - overlay->ink_rect.width, *xpos);
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_HALIGN_POS:
|
|
*xpos += (gint) (overlay->width * overlay->xpos) - width / 2;
|
|
*xpos = CLAMP (*xpos, 0, overlay->width - overlay->ink_rect.width);
|
|
if (*xpos < 0)
|
|
*xpos = 0;
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_HALIGN_ABSOLUTE:
|
|
*xpos = (overlay->width - overlay->text_width) * overlay->xpos;
|
|
break;
|
|
default:
|
|
*xpos = 0;
|
|
}
|
|
*xpos += overlay->deltax;
|
|
|
|
*ypos = overlay->ink_rect.y - overlay->logical_rect.y;
|
|
switch (overlay->valign) {
|
|
case GST_BASE_TEXT_OVERLAY_VALIGN_BOTTOM:
|
|
/* This will be the same as baseline, if there is enough padding,
|
|
* otherwise it will avoid clipping the text */
|
|
*ypos += overlay->height - height - overlay->ypad;
|
|
*ypos = MIN (overlay->height - overlay->ink_rect.height, *ypos);
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_VALIGN_BASELINE:
|
|
*ypos += overlay->height - height - overlay->ypad;
|
|
/* Don't clip, this would not respect the base line */
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_VALIGN_TOP:
|
|
*ypos += overlay->ypad;
|
|
*ypos = MAX (0.0, *ypos);
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_VALIGN_POS:
|
|
*ypos = (gint) (overlay->height * overlay->ypos) - height / 2;
|
|
*ypos = CLAMP (*ypos, 0, overlay->height - overlay->ink_rect.height);
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_VALIGN_ABSOLUTE:
|
|
*ypos = (overlay->height - overlay->text_height) * overlay->ypos;
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_VALIGN_CENTER:
|
|
*ypos = (overlay->height - height) / 2;
|
|
break;
|
|
default:
|
|
*ypos = overlay->ypad;
|
|
break;
|
|
}
|
|
*ypos += overlay->deltay;
|
|
|
|
overlay->text_x = *xpos;
|
|
overlay->text_y = *ypos;
|
|
|
|
GST_DEBUG_OBJECT (overlay, "Placing overlay at (%d, %d)", *xpos, *ypos);
|
|
}
|
|
|
|
static inline void
|
|
gst_base_text_overlay_set_composition (GstBaseTextOverlay * overlay)
|
|
{
|
|
gint xpos, ypos;
|
|
GstVideoOverlayRectangle *rectangle;
|
|
|
|
if (overlay->text_image && overlay->text_width != 1) {
|
|
gint render_width, render_height;
|
|
|
|
gst_base_text_overlay_get_pos (overlay, &xpos, &ypos);
|
|
|
|
render_width = overlay->ink_rect.width;
|
|
render_height = overlay->ink_rect.height;
|
|
|
|
GST_DEBUG ("updating composition for '%s' with window size %dx%d, "
|
|
"buffer size %dx%d, render size %dx%d and position (%d, %d)",
|
|
overlay->default_text, overlay->window_width, overlay->window_height,
|
|
overlay->text_width, overlay->text_height, render_width,
|
|
render_height, xpos, ypos);
|
|
|
|
gst_buffer_add_video_meta (overlay->text_image, GST_VIDEO_FRAME_FLAG_NONE,
|
|
GST_VIDEO_OVERLAY_COMPOSITION_FORMAT_RGB,
|
|
overlay->text_width, overlay->text_height);
|
|
|
|
rectangle = gst_video_overlay_rectangle_new_raw (overlay->text_image,
|
|
xpos, ypos, render_width, render_height,
|
|
GST_VIDEO_OVERLAY_FORMAT_FLAG_PREMULTIPLIED_ALPHA);
|
|
|
|
if (overlay->composition)
|
|
gst_video_overlay_composition_unref (overlay->composition);
|
|
|
|
overlay->composition = gst_video_overlay_composition_new (rectangle);
|
|
gst_video_overlay_rectangle_unref (rectangle);
|
|
|
|
if (overlay->upstream_composition) {
|
|
guint num_overlays =
|
|
gst_video_overlay_composition_n_rectangles
|
|
(overlay->upstream_composition);
|
|
guint i;
|
|
|
|
for (i = 0; i < num_overlays; i++) {
|
|
GstVideoOverlayRectangle *rectangle;
|
|
rectangle =
|
|
gst_video_overlay_composition_get_rectangle
|
|
(overlay->upstream_composition, i);
|
|
gst_video_overlay_composition_add_rectangle (overlay->composition,
|
|
rectangle);
|
|
}
|
|
}
|
|
|
|
} else if (overlay->composition) {
|
|
gst_video_overlay_composition_unref (overlay->composition);
|
|
overlay->composition = NULL;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_text_overlay_filter_foreground_attr (PangoAttribute * attr, gpointer data)
|
|
{
|
|
if (attr->klass->type == PANGO_ATTR_FOREGROUND) {
|
|
return FALSE;
|
|
} else {
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_base_text_overlay_render_pangocairo (GstBaseTextOverlay * overlay,
|
|
const gchar * string, gint textlen)
|
|
{
|
|
cairo_t *cr;
|
|
cairo_surface_t *surface;
|
|
PangoRectangle ink_rect, logical_rect;
|
|
cairo_matrix_t cairo_matrix;
|
|
gint unscaled_width, unscaled_height;
|
|
gint width, height;
|
|
gboolean full_width = FALSE;
|
|
double scalef_x = 1.0, scalef_y = 1.0;
|
|
double a, r, g, b;
|
|
gdouble shadow_offset = 0.0;
|
|
gdouble outline_offset = 0.0;
|
|
gint xpad = 0, ypad = 0;
|
|
GstBuffer *buffer;
|
|
GstMapInfo map;
|
|
|
|
g_mutex_lock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
|
|
if (overlay->auto_adjust_size) {
|
|
/* 640 pixel is default */
|
|
scalef_x = scalef_y = (double) (overlay->width) / DEFAULT_SCALE_BASIS;
|
|
}
|
|
|
|
if (overlay->scale_mode != GST_BASE_TEXT_OVERLAY_SCALE_MODE_NONE) {
|
|
gint par_n = 1, par_d = 1;
|
|
|
|
switch (overlay->scale_mode) {
|
|
case GST_BASE_TEXT_OVERLAY_SCALE_MODE_PAR:
|
|
par_n = overlay->info.par_n;
|
|
par_d = overlay->info.par_d;
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_SCALE_MODE_DISPLAY:
|
|
/* (width * par_n) / (height * par_d) = (display_w / display_h) */
|
|
if (!gst_util_fraction_multiply (overlay->window_width,
|
|
overlay->window_height, overlay->height, overlay->width,
|
|
&par_n, &par_d)) {
|
|
GST_WARNING_OBJECT (overlay,
|
|
"Can't figure out display ratio, defaulting to 1:1");
|
|
par_n = par_d = 1;
|
|
}
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_SCALE_MODE_USER:
|
|
par_n = overlay->scale_par_n;
|
|
par_d = overlay->scale_par_d;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
/* sanitize */
|
|
if (!par_n || !par_d)
|
|
par_n = par_d = 1;
|
|
/* compensate later scaling as would be done for a par_n / par_d p-a-r;
|
|
* apply all scaling to y so as to allow for predictable text width
|
|
* layout independent of the presentation aspect scaling */
|
|
if (overlay->use_vertical_render) {
|
|
scalef_y *= ((gdouble) par_d) / ((gdouble) par_n);
|
|
} else {
|
|
scalef_y *= ((gdouble) par_n) / ((gdouble) par_d);
|
|
}
|
|
GST_DEBUG_OBJECT (overlay,
|
|
"compensate scaling mode %d par %d/%d, scale %f, %f",
|
|
overlay->scale_mode, par_n, par_d, scalef_x, scalef_y);
|
|
}
|
|
|
|
if (overlay->draw_shadow)
|
|
shadow_offset = ceil (overlay->shadow_offset);
|
|
|
|
/* This value is uses as cairo line width, which is the diameter of a pen
|
|
* that is circular. That's why only half of it is used to offset */
|
|
if (overlay->draw_outline)
|
|
outline_offset = ceil (overlay->outline_offset);
|
|
|
|
if (overlay->halign == GST_BASE_TEXT_OVERLAY_HALIGN_LEFT ||
|
|
overlay->halign == GST_BASE_TEXT_OVERLAY_HALIGN_RIGHT)
|
|
xpad = overlay->xpad;
|
|
|
|
if (overlay->valign == GST_BASE_TEXT_OVERLAY_VALIGN_TOP ||
|
|
overlay->valign == GST_BASE_TEXT_OVERLAY_VALIGN_BOTTOM)
|
|
ypad = overlay->ypad;
|
|
|
|
pango_layout_set_width (overlay->layout, -1);
|
|
/* set text on pango layout */
|
|
pango_layout_set_markup (overlay->layout, string, textlen);
|
|
|
|
/* get subtitle image size */
|
|
pango_layout_get_pixel_extents (overlay->layout, &ink_rect, &logical_rect);
|
|
|
|
unscaled_width = ink_rect.width + shadow_offset + outline_offset;
|
|
width = ceil (unscaled_width * scalef_x);
|
|
|
|
/*
|
|
* subtitle image width can be larger then overlay width
|
|
* so rearrange overlay wrap mode.
|
|
*/
|
|
if (overlay->use_vertical_render) {
|
|
if (width + ypad > overlay->height) {
|
|
width = overlay->height - ypad;
|
|
full_width = TRUE;
|
|
}
|
|
} else if (width + xpad > overlay->width) {
|
|
width = overlay->width - xpad;
|
|
full_width = TRUE;
|
|
}
|
|
|
|
if (full_width) {
|
|
unscaled_width = width / scalef_x;
|
|
gst_base_text_overlay_set_wrap_mode (overlay,
|
|
unscaled_width - shadow_offset - outline_offset);
|
|
pango_layout_get_pixel_extents (overlay->layout, &ink_rect, &logical_rect);
|
|
|
|
unscaled_width = ink_rect.width + shadow_offset + outline_offset;
|
|
width = ceil (unscaled_width * scalef_x);
|
|
}
|
|
|
|
unscaled_height = ink_rect.height + shadow_offset + outline_offset;
|
|
height = ceil (unscaled_height * scalef_y);
|
|
|
|
if (overlay->use_vertical_render) {
|
|
if (height + xpad > overlay->width) {
|
|
height = overlay->width - xpad;
|
|
unscaled_height = width / scalef_y;
|
|
}
|
|
} else if (height + ypad > overlay->height) {
|
|
height = overlay->height - ypad;
|
|
unscaled_height = height / scalef_y;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (overlay, "Rendering with ink rect (%d, %d) %dx%d and "
|
|
"logical rect (%d, %d) %dx%d", ink_rect.x, ink_rect.y, ink_rect.width,
|
|
ink_rect.height, logical_rect.x, logical_rect.y, logical_rect.width,
|
|
logical_rect.height);
|
|
GST_DEBUG_OBJECT (overlay, "Rendering with width %d and height %d "
|
|
"(shadow %f, outline %f)", unscaled_width, unscaled_height,
|
|
shadow_offset, outline_offset);
|
|
|
|
|
|
/* Save and scale the rectangles so get_pos() can place the text */
|
|
overlay->ink_rect.x =
|
|
ceil ((ink_rect.x - ceil (outline_offset / 2.0l)) * scalef_x);
|
|
overlay->ink_rect.y =
|
|
ceil ((ink_rect.y - ceil (outline_offset / 2.0l)) * scalef_y);
|
|
overlay->ink_rect.width = width;
|
|
overlay->ink_rect.height = height;
|
|
|
|
overlay->logical_rect.x =
|
|
ceil ((logical_rect.x - ceil (outline_offset / 2.0l)) * scalef_x);
|
|
overlay->logical_rect.y =
|
|
ceil ((logical_rect.y - ceil (outline_offset / 2.0l)) * scalef_y);
|
|
overlay->logical_rect.width =
|
|
ceil ((logical_rect.width + shadow_offset + outline_offset) * scalef_x);
|
|
overlay->logical_rect.height =
|
|
ceil ((logical_rect.height + shadow_offset + outline_offset) * scalef_y);
|
|
|
|
/* flip the rectangle if doing vertical render */
|
|
if (overlay->use_vertical_render) {
|
|
PangoRectangle tmp = overlay->ink_rect;
|
|
|
|
overlay->ink_rect.x = tmp.y;
|
|
overlay->ink_rect.y = tmp.x;
|
|
overlay->ink_rect.width = tmp.height;
|
|
overlay->ink_rect.height = tmp.width;
|
|
/* We want the top left corect, but we now have the top right */
|
|
overlay->ink_rect.x += overlay->ink_rect.width;
|
|
|
|
tmp = overlay->logical_rect;
|
|
overlay->logical_rect.x = tmp.y;
|
|
overlay->logical_rect.y = tmp.x;
|
|
overlay->logical_rect.width = tmp.height;
|
|
overlay->logical_rect.height = tmp.width;
|
|
overlay->logical_rect.x += overlay->logical_rect.width;
|
|
}
|
|
|
|
/* scale to reported window size */
|
|
width = ceil (width * overlay->render_scale);
|
|
height = ceil (height * overlay->render_scale);
|
|
scalef_x *= overlay->render_scale;
|
|
scalef_y *= overlay->render_scale;
|
|
|
|
if (width <= 0 || height <= 0) {
|
|
g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
GST_DEBUG_OBJECT (overlay,
|
|
"Overlay is outside video frame. Skipping text rendering");
|
|
return;
|
|
}
|
|
|
|
if (unscaled_height <= 0 || unscaled_width <= 0) {
|
|
g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
GST_DEBUG_OBJECT (overlay,
|
|
"Overlay is outside video frame. Skipping text rendering");
|
|
return;
|
|
}
|
|
/* Prepare the transformation matrix. Note that the transformation happens
|
|
* in reverse order. So for horizontal text, we will translate and then
|
|
* scale. This is important to understand which scale shall be used. */
|
|
/* So, as this init'ed scale happens last, when the rectangle has already
|
|
* been rotated, the scaling applied to text height (up to now),
|
|
* has to be applied along the x-axis */
|
|
if (overlay->use_vertical_render) {
|
|
double tmp;
|
|
|
|
tmp = scalef_x;
|
|
scalef_x = scalef_y;
|
|
scalef_y = tmp;
|
|
}
|
|
cairo_matrix_init_scale (&cairo_matrix, scalef_x, scalef_y);
|
|
|
|
if (overlay->use_vertical_render) {
|
|
gint tmp;
|
|
|
|
/* tranlate to the center of the image, rotate, and tranlate the rotated
|
|
* image back to the right place */
|
|
cairo_matrix_translate (&cairo_matrix, unscaled_height / 2.0l,
|
|
unscaled_width / 2.0l);
|
|
/* 90 degree clockwise rotation which is PI / 2 in radiants */
|
|
cairo_matrix_rotate (&cairo_matrix, G_PI_2);
|
|
cairo_matrix_translate (&cairo_matrix, -(unscaled_width / 2.0l),
|
|
-(unscaled_height / 2.0l));
|
|
|
|
/* Swap width and height */
|
|
tmp = height;
|
|
height = width;
|
|
width = tmp;
|
|
}
|
|
|
|
cairo_matrix_translate (&cairo_matrix,
|
|
ceil (outline_offset / 2.0l) - ink_rect.x,
|
|
ceil (outline_offset / 2.0l) - ink_rect.y);
|
|
|
|
/* reallocate overlay buffer */
|
|
buffer = gst_buffer_new_and_alloc (4 * width * height);
|
|
gst_buffer_replace (&overlay->text_image, buffer);
|
|
gst_buffer_unref (buffer);
|
|
|
|
gst_buffer_map (buffer, &map, GST_MAP_READWRITE);
|
|
surface = cairo_image_surface_create_for_data (map.data,
|
|
CAIRO_FORMAT_ARGB32, width, height, width * 4);
|
|
cr = cairo_create (surface);
|
|
|
|
/* clear surface */
|
|
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
|
|
cairo_paint (cr);
|
|
|
|
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
|
|
|
|
/* apply transformations */
|
|
cairo_set_matrix (cr, &cairo_matrix);
|
|
|
|
/* FIXME: We use show_layout everywhere except for the surface
|
|
* because it's really faster and internally does all kinds of
|
|
* caching. Unfortunately we have to paint to a cairo path for
|
|
* the outline and this is slow. Once Pango supports user fonts
|
|
* we should use them, see
|
|
* https://bugzilla.gnome.org/show_bug.cgi?id=598695
|
|
*
|
|
* Idea would the be, to create a cairo user font that
|
|
* does shadow, outline, text painting in the
|
|
* render_glyph function.
|
|
*/
|
|
|
|
/* draw shadow text */
|
|
if (overlay->draw_shadow) {
|
|
PangoAttrList *origin_attr, *filtered_attr, *temp_attr;
|
|
|
|
/* Store a ref on the original attributes for later restoration */
|
|
origin_attr =
|
|
pango_attr_list_ref (pango_layout_get_attributes (overlay->layout));
|
|
/* Take a copy of the original attributes, because pango_attr_list_filter
|
|
* modifies the passed list */
|
|
temp_attr = pango_attr_list_copy (origin_attr);
|
|
filtered_attr =
|
|
pango_attr_list_filter (temp_attr,
|
|
gst_text_overlay_filter_foreground_attr, NULL);
|
|
pango_attr_list_unref (temp_attr);
|
|
|
|
cairo_save (cr);
|
|
cairo_translate (cr, overlay->shadow_offset, overlay->shadow_offset);
|
|
cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5);
|
|
pango_layout_set_attributes (overlay->layout, filtered_attr);
|
|
pango_cairo_show_layout (cr, overlay->layout);
|
|
pango_layout_set_attributes (overlay->layout, origin_attr);
|
|
pango_attr_list_unref (filtered_attr);
|
|
pango_attr_list_unref (origin_attr);
|
|
cairo_restore (cr);
|
|
}
|
|
|
|
/* draw outline text */
|
|
if (overlay->draw_outline) {
|
|
a = (overlay->outline_color >> 24) & 0xff;
|
|
r = (overlay->outline_color >> 16) & 0xff;
|
|
g = (overlay->outline_color >> 8) & 0xff;
|
|
b = (overlay->outline_color >> 0) & 0xff;
|
|
|
|
cairo_save (cr);
|
|
cairo_set_source_rgba (cr, r / 255.0, g / 255.0, b / 255.0, a / 255.0);
|
|
cairo_set_line_width (cr, overlay->outline_offset);
|
|
pango_cairo_layout_path (cr, overlay->layout);
|
|
cairo_stroke (cr);
|
|
cairo_restore (cr);
|
|
}
|
|
|
|
a = (overlay->color >> 24) & 0xff;
|
|
r = (overlay->color >> 16) & 0xff;
|
|
g = (overlay->color >> 8) & 0xff;
|
|
b = (overlay->color >> 0) & 0xff;
|
|
|
|
/* draw text */
|
|
cairo_save (cr);
|
|
cairo_set_source_rgba (cr, r / 255.0, g / 255.0, b / 255.0, a / 255.0);
|
|
pango_cairo_show_layout (cr, overlay->layout);
|
|
cairo_restore (cr);
|
|
|
|
cairo_destroy (cr);
|
|
cairo_surface_destroy (surface);
|
|
gst_buffer_unmap (buffer, &map);
|
|
if (width != 0)
|
|
overlay->text_width = width;
|
|
if (height != 0)
|
|
overlay->text_height = height;
|
|
g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
|
|
gst_base_text_overlay_set_composition (overlay);
|
|
}
|
|
|
|
static inline void
|
|
gst_base_text_overlay_shade_planar_Y (GstBaseTextOverlay * overlay,
|
|
GstVideoFrame * dest, gint x0, gint x1, gint y0, gint y1)
|
|
{
|
|
gint i, j, dest_stride;
|
|
guint8 *dest_ptr;
|
|
|
|
dest_stride = dest->info.stride[0];
|
|
dest_ptr = dest->data[0];
|
|
|
|
for (i = y0; i < y1; ++i) {
|
|
for (j = x0; j < x1; ++j) {
|
|
gint y = dest_ptr[(i * dest_stride) + j] - overlay->shading_value;
|
|
|
|
dest_ptr[(i * dest_stride) + j] = CLAMP (y, 0, 255);
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
gst_base_text_overlay_shade_packed_Y (GstBaseTextOverlay * overlay,
|
|
GstVideoFrame * dest, gint x0, gint x1, gint y0, gint y1)
|
|
{
|
|
gint i, j;
|
|
guint dest_stride, pixel_stride;
|
|
guint8 *dest_ptr;
|
|
|
|
dest_stride = GST_VIDEO_FRAME_COMP_STRIDE (dest, 0);
|
|
dest_ptr = GST_VIDEO_FRAME_COMP_DATA (dest, 0);
|
|
pixel_stride = GST_VIDEO_FRAME_COMP_PSTRIDE (dest, 0);
|
|
|
|
if (x0 != 0)
|
|
x0 = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (dest->info.finfo, 0, x0);
|
|
if (x1 != 0)
|
|
x1 = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (dest->info.finfo, 0, x1);
|
|
|
|
if (y0 != 0)
|
|
y0 = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (dest->info.finfo, 0, y0);
|
|
if (y1 != 0)
|
|
y1 = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (dest->info.finfo, 0, y1);
|
|
|
|
for (i = y0; i < y1; i++) {
|
|
for (j = x0; j < x1; j++) {
|
|
gint y;
|
|
gint y_pos;
|
|
|
|
y_pos = (i * dest_stride) + j * pixel_stride;
|
|
y = dest_ptr[y_pos] - overlay->shading_value;
|
|
|
|
dest_ptr[y_pos] = CLAMP (y, 0, 255);
|
|
}
|
|
}
|
|
}
|
|
|
|
#define gst_base_text_overlay_shade_BGRx gst_base_text_overlay_shade_xRGB
|
|
#define gst_base_text_overlay_shade_RGBx gst_base_text_overlay_shade_xRGB
|
|
#define gst_base_text_overlay_shade_xBGR gst_base_text_overlay_shade_xRGB
|
|
static inline void
|
|
gst_base_text_overlay_shade_xRGB (GstBaseTextOverlay * overlay,
|
|
GstVideoFrame * dest, gint x0, gint x1, gint y0, gint y1)
|
|
{
|
|
gint i, j;
|
|
guint8 *dest_ptr;
|
|
|
|
dest_ptr = dest->data[0];
|
|
|
|
for (i = y0; i < y1; i++) {
|
|
for (j = x0; j < x1; j++) {
|
|
gint y, y_pos, k;
|
|
|
|
y_pos = (i * 4 * overlay->width) + j * 4;
|
|
for (k = 0; k < 4; k++) {
|
|
y = dest_ptr[y_pos + k] - overlay->shading_value;
|
|
dest_ptr[y_pos + k] = CLAMP (y, 0, 255);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* FIXME: orcify */
|
|
static void
|
|
gst_base_text_overlay_shade_rgb24 (GstBaseTextOverlay * overlay,
|
|
GstVideoFrame * frame, gint x0, gint x1, gint y0, gint y1)
|
|
{
|
|
const int pstride = 3;
|
|
gint y, x, stride, shading_val, tmp;
|
|
guint8 *p;
|
|
|
|
shading_val = -overlay->shading_value;
|
|
stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0);
|
|
|
|
for (y = y0; y < y1; ++y) {
|
|
p = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
|
|
p += (y * stride) + (x0 * pstride);
|
|
for (x = x0; x < x1; ++x) {
|
|
tmp = *p + shading_val;
|
|
*p++ = CLAMP (tmp, 0, 255);
|
|
tmp = *p + shading_val;
|
|
*p++ = CLAMP (tmp, 0, 255);
|
|
tmp = *p + shading_val;
|
|
*p++ = CLAMP (tmp, 0, 255);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_base_text_overlay_shade_IYU1 (GstBaseTextOverlay * overlay,
|
|
GstVideoFrame * frame, gint x0, gint x1, gint y0, gint y1)
|
|
{
|
|
gint y, x, stride, shading_val, tmp;
|
|
guint8 *p;
|
|
|
|
shading_val = -overlay->shading_value;
|
|
stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0);
|
|
|
|
/* IYU1: packed 4:1:1 YUV (Cb-Y0-Y1-Cr-Y2-Y3 ...) */
|
|
for (y = y0; y < y1; ++y) {
|
|
p = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
|
|
/* move to Y0 or Y1 (we pretend the chroma is the last of the 3 bytes) */
|
|
/* FIXME: we're not pixel-exact here if x0 is an odd number, but it's
|
|
* unlikely anyone will notice.. */
|
|
p += (y * stride) + ((x0 / 2) * 3) + 1;
|
|
for (x = x0; x < x1; x += 2) {
|
|
tmp = *p + shading_val;
|
|
*p++ = CLAMP (tmp, 0, 255);
|
|
tmp = *p + shading_val;
|
|
*p++ = CLAMP (tmp, 0, 255);
|
|
/* skip chroma */
|
|
p++;
|
|
}
|
|
}
|
|
}
|
|
|
|
#define ARGB_SHADE_FUNCTION(name, OFFSET) \
|
|
static inline void \
|
|
gst_base_text_overlay_shade_##name (GstBaseTextOverlay * overlay, GstVideoFrame * dest, \
|
|
gint x0, gint x1, gint y0, gint y1) \
|
|
{ \
|
|
gint i, j;\
|
|
guint8 *dest_ptr;\
|
|
\
|
|
dest_ptr = dest->data[0];\
|
|
\
|
|
for (i = y0; i < y1; i++) {\
|
|
for (j = x0; j < x1; j++) {\
|
|
gint y, y_pos, k;\
|
|
y_pos = (i * 4 * overlay->width) + j * 4;\
|
|
for (k = OFFSET; k < 3+OFFSET; k++) {\
|
|
y = dest_ptr[y_pos + k] - overlay->shading_value;\
|
|
dest_ptr[y_pos + k] = CLAMP (y, 0, 255);\
|
|
}\
|
|
}\
|
|
}\
|
|
}
|
|
ARGB_SHADE_FUNCTION (ARGB, 1);
|
|
ARGB_SHADE_FUNCTION (ABGR, 1);
|
|
ARGB_SHADE_FUNCTION (RGBA, 0);
|
|
ARGB_SHADE_FUNCTION (BGRA, 0);
|
|
|
|
static void
|
|
gst_base_text_overlay_render_text (GstBaseTextOverlay * overlay,
|
|
const gchar * text, gint textlen)
|
|
{
|
|
gchar *string;
|
|
|
|
if (!overlay->need_render) {
|
|
GST_DEBUG ("Using previously rendered text.");
|
|
return;
|
|
}
|
|
|
|
/* -1 is the whole string */
|
|
if (text != NULL && textlen < 0) {
|
|
textlen = strlen (text);
|
|
}
|
|
|
|
if (text != NULL) {
|
|
string = g_strndup (text, textlen);
|
|
} else { /* empty string */
|
|
string = g_strdup (" ");
|
|
}
|
|
g_strdelimit (string, "\r\t", ' ');
|
|
textlen = strlen (string);
|
|
|
|
/* FIXME: should we check for UTF-8 here? */
|
|
|
|
GST_DEBUG ("Rendering '%s'", string);
|
|
gst_base_text_overlay_render_pangocairo (overlay, string, textlen);
|
|
|
|
g_free (string);
|
|
|
|
overlay->need_render = FALSE;
|
|
}
|
|
|
|
/* FIXME: should probably be relative to width/height (adjusted for PAR) */
|
|
#define BOX_XPAD 6
|
|
#define BOX_YPAD 6
|
|
|
|
static void
|
|
gst_base_text_overlay_shade_background (GstBaseTextOverlay * overlay,
|
|
GstVideoFrame * frame, gint x0, gint x1, gint y0, gint y1)
|
|
{
|
|
x0 = CLAMP (x0 - BOX_XPAD, 0, overlay->width);
|
|
x1 = CLAMP (x1 + BOX_XPAD, 0, overlay->width);
|
|
|
|
y0 = CLAMP (y0 - BOX_YPAD, 0, overlay->height);
|
|
y1 = CLAMP (y1 + BOX_YPAD, 0, overlay->height);
|
|
|
|
switch (overlay->format) {
|
|
case GST_VIDEO_FORMAT_I420:
|
|
case GST_VIDEO_FORMAT_YV12:
|
|
case GST_VIDEO_FORMAT_NV12:
|
|
case GST_VIDEO_FORMAT_NV21:
|
|
case GST_VIDEO_FORMAT_Y41B:
|
|
case GST_VIDEO_FORMAT_Y42B:
|
|
case GST_VIDEO_FORMAT_Y444:
|
|
case GST_VIDEO_FORMAT_YUV9:
|
|
case GST_VIDEO_FORMAT_YVU9:
|
|
case GST_VIDEO_FORMAT_GRAY8:
|
|
case GST_VIDEO_FORMAT_A420:
|
|
gst_base_text_overlay_shade_planar_Y (overlay, frame, x0, x1, y0, y1);
|
|
break;
|
|
case GST_VIDEO_FORMAT_AYUV:
|
|
case GST_VIDEO_FORMAT_UYVY:
|
|
case GST_VIDEO_FORMAT_VYUY:
|
|
case GST_VIDEO_FORMAT_YUY2:
|
|
case GST_VIDEO_FORMAT_v308:
|
|
case GST_VIDEO_FORMAT_IYU2:
|
|
gst_base_text_overlay_shade_packed_Y (overlay, frame, x0, x1, y0, y1);
|
|
break;
|
|
case GST_VIDEO_FORMAT_xRGB:
|
|
gst_base_text_overlay_shade_xRGB (overlay, frame, x0, x1, y0, y1);
|
|
break;
|
|
case GST_VIDEO_FORMAT_xBGR:
|
|
gst_base_text_overlay_shade_xBGR (overlay, frame, x0, x1, y0, y1);
|
|
break;
|
|
case GST_VIDEO_FORMAT_BGRx:
|
|
gst_base_text_overlay_shade_BGRx (overlay, frame, x0, x1, y0, y1);
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGBx:
|
|
gst_base_text_overlay_shade_RGBx (overlay, frame, x0, x1, y0, y1);
|
|
break;
|
|
case GST_VIDEO_FORMAT_ARGB:
|
|
gst_base_text_overlay_shade_ARGB (overlay, frame, x0, x1, y0, y1);
|
|
break;
|
|
case GST_VIDEO_FORMAT_ABGR:
|
|
gst_base_text_overlay_shade_ABGR (overlay, frame, x0, x1, y0, y1);
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGBA:
|
|
gst_base_text_overlay_shade_RGBA (overlay, frame, x0, x1, y0, y1);
|
|
break;
|
|
case GST_VIDEO_FORMAT_BGRA:
|
|
gst_base_text_overlay_shade_BGRA (overlay, frame, x0, x1, y0, y1);
|
|
break;
|
|
case GST_VIDEO_FORMAT_BGR:
|
|
case GST_VIDEO_FORMAT_RGB:
|
|
gst_base_text_overlay_shade_rgb24 (overlay, frame, x0, x1, y0, y1);
|
|
break;
|
|
case GST_VIDEO_FORMAT_IYU1:
|
|
gst_base_text_overlay_shade_IYU1 (overlay, frame, x0, x1, y0, y1);
|
|
break;
|
|
default:
|
|
GST_FIXME_OBJECT (overlay, "implement background shading for format %s",
|
|
gst_video_format_to_string (GST_VIDEO_FRAME_FORMAT (frame)));
|
|
break;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_base_text_overlay_push_frame (GstBaseTextOverlay * overlay,
|
|
GstBuffer * video_frame)
|
|
{
|
|
GstVideoFrame frame;
|
|
|
|
if (overlay->composition == NULL)
|
|
goto done;
|
|
|
|
if (gst_pad_check_reconfigure (overlay->srcpad)) {
|
|
if (!gst_base_text_overlay_negotiate (overlay, NULL)) {
|
|
gst_pad_mark_reconfigure (overlay->srcpad);
|
|
gst_buffer_unref (video_frame);
|
|
if (GST_PAD_IS_FLUSHING (overlay->srcpad))
|
|
return GST_FLOW_FLUSHING;
|
|
else
|
|
return GST_FLOW_NOT_NEGOTIATED;
|
|
}
|
|
}
|
|
|
|
video_frame = gst_buffer_make_writable (video_frame);
|
|
|
|
if (overlay->attach_compo_to_buffer) {
|
|
GST_DEBUG_OBJECT (overlay, "Attaching text overlay image to video buffer");
|
|
gst_buffer_add_video_overlay_composition_meta (video_frame,
|
|
overlay->composition);
|
|
/* FIXME: emulate shaded background box if want_shading=true */
|
|
goto done;
|
|
}
|
|
|
|
if (!gst_video_frame_map (&frame, &overlay->info, video_frame,
|
|
GST_MAP_READWRITE))
|
|
goto invalid_frame;
|
|
|
|
/* shaded background box */
|
|
if (overlay->want_shading) {
|
|
gint xpos, ypos;
|
|
|
|
gst_base_text_overlay_get_pos (overlay, &xpos, &ypos);
|
|
|
|
gst_base_text_overlay_shade_background (overlay, &frame,
|
|
xpos, xpos + overlay->text_width, ypos, ypos + overlay->text_height);
|
|
}
|
|
|
|
gst_video_overlay_composition_blend (overlay->composition, &frame);
|
|
|
|
gst_video_frame_unmap (&frame);
|
|
|
|
done:
|
|
|
|
return gst_pad_push (overlay->srcpad, video_frame);
|
|
|
|
/* ERRORS */
|
|
invalid_frame:
|
|
{
|
|
gst_buffer_unref (video_frame);
|
|
GST_DEBUG_OBJECT (overlay, "received invalid buffer");
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
static GstPadLinkReturn
|
|
gst_base_text_overlay_text_pad_link (GstPad * pad, GstObject * parent,
|
|
GstPad * peer)
|
|
{
|
|
GstBaseTextOverlay *overlay;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (parent);
|
|
if (G_UNLIKELY (!overlay))
|
|
return GST_PAD_LINK_REFUSED;
|
|
|
|
GST_DEBUG_OBJECT (overlay, "Text pad linked");
|
|
|
|
overlay->text_linked = TRUE;
|
|
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
static void
|
|
gst_base_text_overlay_text_pad_unlink (GstPad * pad, GstObject * parent)
|
|
{
|
|
GstBaseTextOverlay *overlay;
|
|
|
|
/* don't use gst_pad_get_parent() here, will deadlock */
|
|
overlay = GST_BASE_TEXT_OVERLAY (parent);
|
|
|
|
GST_DEBUG_OBJECT (overlay, "Text pad unlinked");
|
|
|
|
overlay->text_linked = FALSE;
|
|
|
|
gst_segment_init (&overlay->text_segment, GST_FORMAT_UNDEFINED);
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_text_overlay_text_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstBaseTextOverlay *overlay = NULL;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (parent);
|
|
|
|
GST_LOG_OBJECT (pad, "received event %s", GST_EVENT_TYPE_NAME (event));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_CAPS:
|
|
{
|
|
GstCaps *caps;
|
|
|
|
gst_event_parse_caps (event, &caps);
|
|
ret = gst_base_text_overlay_setcaps_txt (overlay, caps);
|
|
gst_event_unref (event);
|
|
break;
|
|
}
|
|
case GST_EVENT_SEGMENT:
|
|
{
|
|
const GstSegment *segment;
|
|
|
|
overlay->text_eos = FALSE;
|
|
|
|
gst_event_parse_segment (event, &segment);
|
|
|
|
if (segment->format == GST_FORMAT_TIME) {
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
gst_segment_copy_into (segment, &overlay->text_segment);
|
|
GST_DEBUG_OBJECT (overlay, "TEXT SEGMENT now: %" GST_SEGMENT_FORMAT,
|
|
&overlay->text_segment);
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
} else {
|
|
GST_ELEMENT_WARNING (overlay, STREAM, MUX, (NULL),
|
|
("received non-TIME newsegment event on text input"));
|
|
}
|
|
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
|
|
/* wake up the video chain, it might be waiting for a text buffer or
|
|
* a text segment update */
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
GST_BASE_TEXT_OVERLAY_BROADCAST (overlay);
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
break;
|
|
}
|
|
case GST_EVENT_GAP:
|
|
{
|
|
GstClockTime start, duration;
|
|
|
|
gst_event_parse_gap (event, &start, &duration);
|
|
if (GST_CLOCK_TIME_IS_VALID (duration))
|
|
start += duration;
|
|
/* we do not expect another buffer until after gap,
|
|
* so that is our position now */
|
|
overlay->text_segment.position = start;
|
|
|
|
/* wake up the video chain, it might be waiting for a text buffer or
|
|
* a text segment update */
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
GST_BASE_TEXT_OVERLAY_BROADCAST (overlay);
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
case GST_EVENT_FLUSH_STOP:
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
GST_INFO_OBJECT (overlay, "text flush stop");
|
|
overlay->text_flushing = FALSE;
|
|
overlay->text_eos = FALSE;
|
|
gst_base_text_overlay_pop_text (overlay);
|
|
gst_segment_init (&overlay->text_segment, GST_FORMAT_TIME);
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
case GST_EVENT_FLUSH_START:
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
GST_INFO_OBJECT (overlay, "text flush start");
|
|
overlay->text_flushing = TRUE;
|
|
GST_BASE_TEXT_OVERLAY_BROADCAST (overlay);
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
case GST_EVENT_EOS:
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
overlay->text_eos = TRUE;
|
|
GST_INFO_OBJECT (overlay, "text EOS");
|
|
/* wake up the video chain, it might be waiting for a text buffer or
|
|
* a text segment update */
|
|
GST_BASE_TEXT_OVERLAY_BROADCAST (overlay);
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
default:
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_text_overlay_video_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstBaseTextOverlay *overlay = NULL;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (parent);
|
|
|
|
GST_DEBUG_OBJECT (pad, "received event %s", GST_EVENT_TYPE_NAME (event));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_CAPS:
|
|
{
|
|
GstCaps *caps;
|
|
|
|
gst_event_parse_caps (event, &caps);
|
|
ret = gst_base_text_overlay_setcaps (overlay, caps);
|
|
gst_event_unref (event);
|
|
break;
|
|
}
|
|
case GST_EVENT_SEGMENT:
|
|
{
|
|
const GstSegment *segment;
|
|
|
|
GST_DEBUG_OBJECT (overlay, "received new segment");
|
|
|
|
gst_event_parse_segment (event, &segment);
|
|
|
|
if (segment->format == GST_FORMAT_TIME) {
|
|
gst_segment_copy_into (segment, &overlay->segment);
|
|
GST_DEBUG_OBJECT (overlay, "VIDEO SEGMENT now: %" GST_SEGMENT_FORMAT,
|
|
&overlay->segment);
|
|
} else {
|
|
GST_ELEMENT_WARNING (overlay, STREAM, MUX, (NULL),
|
|
("received non-TIME newsegment event on video input"));
|
|
}
|
|
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
}
|
|
case GST_EVENT_EOS:
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
GST_INFO_OBJECT (overlay, "video EOS");
|
|
overlay->video_eos = TRUE;
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
case GST_EVENT_FLUSH_START:
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
GST_INFO_OBJECT (overlay, "video flush start");
|
|
overlay->video_flushing = TRUE;
|
|
GST_BASE_TEXT_OVERLAY_BROADCAST (overlay);
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
case GST_EVENT_FLUSH_STOP:
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
GST_INFO_OBJECT (overlay, "video flush stop");
|
|
overlay->video_flushing = FALSE;
|
|
overlay->video_eos = FALSE;
|
|
gst_segment_init (&overlay->segment, GST_FORMAT_TIME);
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
default:
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_text_overlay_video_query (GstPad * pad, GstObject * parent,
|
|
GstQuery * query)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstBaseTextOverlay *overlay;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (parent);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_CAPS:
|
|
{
|
|
GstCaps *filter, *caps;
|
|
|
|
gst_query_parse_caps (query, &filter);
|
|
caps = gst_base_text_overlay_get_videosink_caps (pad, overlay, filter);
|
|
gst_query_set_caps_result (query, caps);
|
|
gst_caps_unref (caps);
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
default:
|
|
ret = gst_pad_query_default (pad, parent, query);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Called with lock held */
|
|
static void
|
|
gst_base_text_overlay_pop_text (GstBaseTextOverlay * overlay)
|
|
{
|
|
g_return_if_fail (GST_IS_BASE_TEXT_OVERLAY (overlay));
|
|
|
|
if (overlay->text_buffer) {
|
|
GST_DEBUG_OBJECT (overlay, "releasing text buffer %p",
|
|
overlay->text_buffer);
|
|
gst_buffer_unref (overlay->text_buffer);
|
|
overlay->text_buffer = NULL;
|
|
}
|
|
|
|
/* Let the text task know we used that buffer */
|
|
GST_BASE_TEXT_OVERLAY_BROADCAST (overlay);
|
|
}
|
|
|
|
/* We receive text buffers here. If they are out of segment we just ignore them.
|
|
If the buffer is in our segment we keep it internally except if another one
|
|
is already waiting here, in that case we wait that it gets kicked out */
|
|
static GstFlowReturn
|
|
gst_base_text_overlay_text_chain (GstPad * pad, GstObject * parent,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstBaseTextOverlay *overlay = NULL;
|
|
gboolean in_seg = FALSE;
|
|
guint64 clip_start = 0, clip_stop = 0;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (parent);
|
|
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
|
|
if (overlay->text_flushing) {
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
ret = GST_FLOW_FLUSHING;
|
|
GST_LOG_OBJECT (overlay, "text flushing");
|
|
goto beach;
|
|
}
|
|
|
|
if (overlay->text_eos) {
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
ret = GST_FLOW_EOS;
|
|
GST_LOG_OBJECT (overlay, "text EOS");
|
|
goto beach;
|
|
}
|
|
|
|
GST_LOG_OBJECT (overlay, "%" GST_SEGMENT_FORMAT " BUFFER: ts=%"
|
|
GST_TIME_FORMAT ", end=%" GST_TIME_FORMAT, &overlay->segment,
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer) +
|
|
GST_BUFFER_DURATION (buffer)));
|
|
|
|
if (G_LIKELY (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))) {
|
|
GstClockTime stop;
|
|
|
|
if (G_LIKELY (GST_BUFFER_DURATION_IS_VALID (buffer)))
|
|
stop = GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer);
|
|
else
|
|
stop = GST_CLOCK_TIME_NONE;
|
|
|
|
in_seg = gst_segment_clip (&overlay->text_segment, GST_FORMAT_TIME,
|
|
GST_BUFFER_TIMESTAMP (buffer), stop, &clip_start, &clip_stop);
|
|
} else {
|
|
in_seg = TRUE;
|
|
}
|
|
|
|
if (in_seg) {
|
|
/* about to change metadata */
|
|
buffer = gst_buffer_make_writable (buffer);
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
|
|
GST_BUFFER_TIMESTAMP (buffer) = clip_start;
|
|
if (GST_BUFFER_DURATION_IS_VALID (buffer))
|
|
GST_BUFFER_DURATION (buffer) = clip_stop - clip_start;
|
|
|
|
/* Wait for the previous buffer to go away */
|
|
while (overlay->text_buffer != NULL) {
|
|
GST_DEBUG ("Pad %s:%s has a buffer queued, waiting",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
GST_BASE_TEXT_OVERLAY_WAIT (overlay);
|
|
GST_DEBUG ("Pad %s:%s resuming", GST_DEBUG_PAD_NAME (pad));
|
|
if (overlay->text_flushing) {
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
ret = GST_FLOW_FLUSHING;
|
|
goto beach;
|
|
}
|
|
}
|
|
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
|
|
overlay->text_segment.position = clip_start;
|
|
|
|
overlay->text_buffer = buffer; /* pass ownership of @buffer */
|
|
buffer = NULL;
|
|
|
|
/* That's a new text buffer we need to render */
|
|
overlay->need_render = TRUE;
|
|
|
|
/* in case the video chain is waiting for a text buffer, wake it up */
|
|
GST_BASE_TEXT_OVERLAY_BROADCAST (overlay);
|
|
}
|
|
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
|
|
beach:
|
|
if (buffer)
|
|
gst_buffer_unref (buffer);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_base_text_overlay_video_chain (GstPad * pad, GstObject * parent,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstBaseTextOverlayClass *klass;
|
|
GstBaseTextOverlay *overlay;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
gboolean in_seg = FALSE;
|
|
guint64 start, stop, clip_start = 0, clip_stop = 0;
|
|
gchar *text = NULL;
|
|
GstVideoOverlayCompositionMeta *composition_meta;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (parent);
|
|
|
|
composition_meta = gst_buffer_get_video_overlay_composition_meta (buffer);
|
|
if (composition_meta) {
|
|
if (overlay->upstream_composition != composition_meta->overlay) {
|
|
GST_DEBUG ("GstVideoOverlayCompositionMeta found.");
|
|
overlay->upstream_composition = composition_meta->overlay;
|
|
overlay->need_render = TRUE;
|
|
}
|
|
} else if (overlay->upstream_composition != NULL) {
|
|
overlay->upstream_composition = NULL;
|
|
overlay->need_render = TRUE;
|
|
}
|
|
|
|
klass = GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay);
|
|
|
|
if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
|
|
goto missing_timestamp;
|
|
|
|
/* ignore buffers that are outside of the current segment */
|
|
start = GST_BUFFER_TIMESTAMP (buffer);
|
|
|
|
if (!GST_BUFFER_DURATION_IS_VALID (buffer)) {
|
|
stop = GST_CLOCK_TIME_NONE;
|
|
} else {
|
|
stop = start + GST_BUFFER_DURATION (buffer);
|
|
}
|
|
|
|
GST_LOG_OBJECT (overlay, "%" GST_SEGMENT_FORMAT " BUFFER: ts=%"
|
|
GST_TIME_FORMAT ", end=%" GST_TIME_FORMAT, &overlay->segment,
|
|
GST_TIME_ARGS (start), GST_TIME_ARGS (stop));
|
|
|
|
/* segment_clip() will adjust start unconditionally to segment_start if
|
|
* no stop time is provided, so handle this ourselves */
|
|
if (stop == GST_CLOCK_TIME_NONE && start < overlay->segment.start)
|
|
goto out_of_segment;
|
|
|
|
in_seg = gst_segment_clip (&overlay->segment, GST_FORMAT_TIME, start, stop,
|
|
&clip_start, &clip_stop);
|
|
|
|
if (!in_seg)
|
|
goto out_of_segment;
|
|
|
|
/* if the buffer is only partially in the segment, fix up stamps */
|
|
if (clip_start != start || (stop != -1 && clip_stop != stop)) {
|
|
GST_DEBUG_OBJECT (overlay, "clipping buffer timestamp/duration to segment");
|
|
buffer = gst_buffer_make_writable (buffer);
|
|
GST_BUFFER_TIMESTAMP (buffer) = clip_start;
|
|
if (stop != -1)
|
|
GST_BUFFER_DURATION (buffer) = clip_stop - clip_start;
|
|
}
|
|
|
|
/* now, after we've done the clipping, fix up end time if there's no
|
|
* duration (we only use those estimated values internally though, we
|
|
* don't want to set bogus values on the buffer itself) */
|
|
if (stop == -1) {
|
|
if (overlay->info.fps_n && overlay->info.fps_d) {
|
|
GST_DEBUG_OBJECT (overlay, "estimating duration based on framerate");
|
|
stop = start + gst_util_uint64_scale_int (GST_SECOND,
|
|
overlay->info.fps_d, overlay->info.fps_n);
|
|
} else {
|
|
GST_LOG_OBJECT (overlay, "no duration, assuming minimal duration");
|
|
stop = start + 1; /* we need to assume some interval */
|
|
}
|
|
}
|
|
|
|
gst_object_sync_values (GST_OBJECT (overlay), GST_BUFFER_TIMESTAMP (buffer));
|
|
|
|
wait_for_text_buf:
|
|
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
|
|
if (overlay->video_flushing)
|
|
goto flushing;
|
|
|
|
if (overlay->video_eos)
|
|
goto have_eos;
|
|
|
|
if (overlay->silent) {
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
ret = gst_pad_push (overlay->srcpad, buffer);
|
|
|
|
/* Update position */
|
|
overlay->segment.position = clip_start;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Text pad not linked, rendering internal text */
|
|
if (!overlay->text_linked) {
|
|
if (klass->get_text) {
|
|
text = klass->get_text (overlay, buffer);
|
|
} else {
|
|
text = g_strdup (overlay->default_text);
|
|
}
|
|
|
|
GST_LOG_OBJECT (overlay, "Text pad not linked, rendering default "
|
|
"text: '%s'", GST_STR_NULL (text));
|
|
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
|
|
if (text != NULL && *text != '\0') {
|
|
/* Render and push */
|
|
gst_base_text_overlay_render_text (overlay, text, -1);
|
|
ret = gst_base_text_overlay_push_frame (overlay, buffer);
|
|
} else {
|
|
/* Invalid or empty string */
|
|
ret = gst_pad_push (overlay->srcpad, buffer);
|
|
}
|
|
} else {
|
|
/* Text pad linked, check if we have a text buffer queued */
|
|
if (overlay->text_buffer) {
|
|
gboolean pop_text = FALSE, valid_text_time = TRUE;
|
|
GstClockTime text_start = GST_CLOCK_TIME_NONE;
|
|
GstClockTime text_end = GST_CLOCK_TIME_NONE;
|
|
GstClockTime text_running_time = GST_CLOCK_TIME_NONE;
|
|
GstClockTime text_running_time_end = GST_CLOCK_TIME_NONE;
|
|
GstClockTime vid_running_time, vid_running_time_end;
|
|
|
|
/* if the text buffer isn't stamped right, pop it off the
|
|
* queue and display it for the current video frame only */
|
|
if (!GST_BUFFER_TIMESTAMP_IS_VALID (overlay->text_buffer) ||
|
|
!GST_BUFFER_DURATION_IS_VALID (overlay->text_buffer)) {
|
|
GST_WARNING_OBJECT (overlay,
|
|
"Got text buffer with invalid timestamp or duration");
|
|
pop_text = TRUE;
|
|
valid_text_time = FALSE;
|
|
} else {
|
|
text_start = GST_BUFFER_TIMESTAMP (overlay->text_buffer);
|
|
text_end = text_start + GST_BUFFER_DURATION (overlay->text_buffer);
|
|
}
|
|
|
|
vid_running_time =
|
|
gst_segment_to_running_time (&overlay->segment, GST_FORMAT_TIME,
|
|
start);
|
|
vid_running_time_end =
|
|
gst_segment_to_running_time (&overlay->segment, GST_FORMAT_TIME,
|
|
stop);
|
|
|
|
/* If timestamp and duration are valid */
|
|
if (valid_text_time) {
|
|
text_running_time =
|
|
gst_segment_to_running_time (&overlay->text_segment,
|
|
GST_FORMAT_TIME, text_start);
|
|
text_running_time_end =
|
|
gst_segment_to_running_time (&overlay->text_segment,
|
|
GST_FORMAT_TIME, text_end);
|
|
}
|
|
|
|
GST_LOG_OBJECT (overlay, "T: %" GST_TIME_FORMAT " - %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (text_running_time),
|
|
GST_TIME_ARGS (text_running_time_end));
|
|
GST_LOG_OBJECT (overlay, "V: %" GST_TIME_FORMAT " - %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (vid_running_time),
|
|
GST_TIME_ARGS (vid_running_time_end));
|
|
|
|
/* Text too old or in the future */
|
|
if (valid_text_time && text_running_time_end <= vid_running_time) {
|
|
/* text buffer too old, get rid of it and do nothing */
|
|
GST_LOG_OBJECT (overlay, "text buffer too old, popping");
|
|
pop_text = FALSE;
|
|
gst_base_text_overlay_pop_text (overlay);
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
goto wait_for_text_buf;
|
|
} else if (valid_text_time && vid_running_time_end <= text_running_time) {
|
|
GST_LOG_OBJECT (overlay, "text in future, pushing video buf");
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
/* Push the video frame */
|
|
ret = gst_pad_push (overlay->srcpad, buffer);
|
|
} else {
|
|
GstMapInfo map;
|
|
gchar *in_text;
|
|
gsize in_size;
|
|
|
|
gst_buffer_map (overlay->text_buffer, &map, GST_MAP_READ);
|
|
in_text = (gchar *) map.data;
|
|
in_size = map.size;
|
|
|
|
if (in_size > 0) {
|
|
/* g_markup_escape_text() absolutely requires valid UTF8 input, it
|
|
* might crash otherwise. We don't fall back on GST_SUBTITLE_ENCODING
|
|
* here on purpose, this is something that needs fixing upstream */
|
|
if (!g_utf8_validate (in_text, in_size, NULL)) {
|
|
const gchar *end = NULL;
|
|
|
|
GST_WARNING_OBJECT (overlay, "received invalid UTF-8");
|
|
in_text = g_strndup (in_text, in_size);
|
|
while (!g_utf8_validate (in_text, in_size, &end) && end)
|
|
*((gchar *) end) = '*';
|
|
}
|
|
|
|
/* Get the string */
|
|
if (overlay->have_pango_markup) {
|
|
text = g_strndup (in_text, in_size);
|
|
} else {
|
|
text = g_markup_escape_text (in_text, in_size);
|
|
}
|
|
|
|
if (text != NULL && *text != '\0') {
|
|
gint text_len = strlen (text);
|
|
|
|
while (text_len > 0 && (text[text_len - 1] == '\n' ||
|
|
text[text_len - 1] == '\r')) {
|
|
--text_len;
|
|
}
|
|
GST_DEBUG_OBJECT (overlay, "Rendering text '%*s'", text_len, text);
|
|
gst_base_text_overlay_render_text (overlay, text, text_len);
|
|
} else {
|
|
GST_DEBUG_OBJECT (overlay, "No text to render (empty buffer)");
|
|
gst_base_text_overlay_render_text (overlay, " ", 1);
|
|
}
|
|
if (in_text != (gchar *) map.data)
|
|
g_free (in_text);
|
|
} else {
|
|
GST_DEBUG_OBJECT (overlay, "No text to render (empty buffer)");
|
|
gst_base_text_overlay_render_text (overlay, " ", 1);
|
|
}
|
|
|
|
gst_buffer_unmap (overlay->text_buffer, &map);
|
|
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
ret = gst_base_text_overlay_push_frame (overlay, buffer);
|
|
|
|
if (valid_text_time && text_running_time_end <= vid_running_time_end) {
|
|
GST_LOG_OBJECT (overlay, "text buffer not needed any longer");
|
|
pop_text = TRUE;
|
|
}
|
|
}
|
|
if (pop_text) {
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
gst_base_text_overlay_pop_text (overlay);
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
}
|
|
} else {
|
|
gboolean wait_for_text_buf = TRUE;
|
|
|
|
if (overlay->text_eos)
|
|
wait_for_text_buf = FALSE;
|
|
|
|
if (!overlay->wait_text)
|
|
wait_for_text_buf = FALSE;
|
|
|
|
/* Text pad linked, but no text buffer available - what now? */
|
|
if (overlay->text_segment.format == GST_FORMAT_TIME) {
|
|
GstClockTime text_start_running_time, text_position_running_time;
|
|
GstClockTime vid_running_time;
|
|
|
|
vid_running_time =
|
|
gst_segment_to_running_time (&overlay->segment, GST_FORMAT_TIME,
|
|
GST_BUFFER_TIMESTAMP (buffer));
|
|
text_start_running_time =
|
|
gst_segment_to_running_time (&overlay->text_segment,
|
|
GST_FORMAT_TIME, overlay->text_segment.start);
|
|
text_position_running_time =
|
|
gst_segment_to_running_time (&overlay->text_segment,
|
|
GST_FORMAT_TIME, overlay->text_segment.position);
|
|
|
|
if ((GST_CLOCK_TIME_IS_VALID (text_start_running_time) &&
|
|
vid_running_time < text_start_running_time) ||
|
|
(GST_CLOCK_TIME_IS_VALID (text_position_running_time) &&
|
|
vid_running_time < text_position_running_time)) {
|
|
wait_for_text_buf = FALSE;
|
|
}
|
|
}
|
|
|
|
if (wait_for_text_buf) {
|
|
GST_DEBUG_OBJECT (overlay, "no text buffer, need to wait for one");
|
|
GST_BASE_TEXT_OVERLAY_WAIT (overlay);
|
|
GST_DEBUG_OBJECT (overlay, "resuming");
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
goto wait_for_text_buf;
|
|
} else {
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
GST_LOG_OBJECT (overlay, "no need to wait for a text buffer");
|
|
ret = gst_pad_push (overlay->srcpad, buffer);
|
|
}
|
|
}
|
|
}
|
|
|
|
g_free (text);
|
|
|
|
/* Update position */
|
|
overlay->segment.position = clip_start;
|
|
|
|
return ret;
|
|
|
|
missing_timestamp:
|
|
{
|
|
GST_WARNING_OBJECT (overlay, "buffer without timestamp, discarding");
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
flushing:
|
|
{
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
GST_DEBUG_OBJECT (overlay, "flushing, discarding buffer");
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_FLUSHING;
|
|
}
|
|
have_eos:
|
|
{
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
GST_DEBUG_OBJECT (overlay, "eos, discarding buffer");
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_EOS;
|
|
}
|
|
out_of_segment:
|
|
{
|
|
GST_DEBUG_OBJECT (overlay, "buffer out of segment, discarding");
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_base_text_overlay_change_state (GstElement * element,
|
|
GstStateChange transition)
|
|
{
|
|
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
|
|
GstBaseTextOverlay *overlay = GST_BASE_TEXT_OVERLAY (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
overlay->text_flushing = TRUE;
|
|
overlay->video_flushing = TRUE;
|
|
/* pop_text will broadcast on the GCond and thus also make the video
|
|
* chain exit if it's waiting for a text buffer */
|
|
gst_base_text_overlay_pop_text (overlay);
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = parent_class->change_state (element, transition);
|
|
if (ret == GST_STATE_CHANGE_FAILURE)
|
|
return ret;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
GST_BASE_TEXT_OVERLAY_LOCK (overlay);
|
|
overlay->text_flushing = FALSE;
|
|
overlay->video_flushing = FALSE;
|
|
overlay->video_eos = FALSE;
|
|
overlay->text_eos = FALSE;
|
|
gst_segment_init (&overlay->segment, GST_FORMAT_TIME);
|
|
gst_segment_init (&overlay->text_segment, GST_FORMAT_TIME);
|
|
GST_BASE_TEXT_OVERLAY_UNLOCK (overlay);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
if (!gst_element_register (plugin, "textoverlay", GST_RANK_NONE,
|
|
GST_TYPE_TEXT_OVERLAY) ||
|
|
!gst_element_register (plugin, "timeoverlay", GST_RANK_NONE,
|
|
GST_TYPE_TIME_OVERLAY) ||
|
|
!gst_element_register (plugin, "clockoverlay", GST_RANK_NONE,
|
|
GST_TYPE_CLOCK_OVERLAY) ||
|
|
!gst_element_register (plugin, "textrender", GST_RANK_NONE,
|
|
GST_TYPE_TEXT_RENDER)) {
|
|
return FALSE;
|
|
}
|
|
|
|
/*texttestsrc_plugin_init(module, plugin); */
|
|
|
|
GST_DEBUG_CATEGORY_INIT (pango_debug, "pango", 0, "Pango elements");
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR,
|
|
pango, "Pango-based text rendering and overlay", plugin_init,
|
|
VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
|