mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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2795 lines
87 KiB
C
2795 lines
87 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-textoverlay
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* @see_also: #GstTextRender, #GstClockOverlay, #GstTimeOverlay, #GstSubParse
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*
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* This plugin renders text on top of a video stream. This can be either
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* static text or text from buffers received on the text sink pad, e.g.
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* as produced by the subparse element. If the text sink pad is not linked,
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* the text set via the "text" property will be rendered. If the text sink
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* pad is linked, text will be rendered as it is received on that pad,
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* honouring and matching the buffer timestamps of both input streams.
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*
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* The text can contain newline characters and text wrapping is enabled by
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* default.
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*
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* <refsect2>
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* <title>Example launch lines</title>
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* |[
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* gst-launch -v videotestsrc ! textoverlay text="Room A" valign=top halign=left ! xvimagesink
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* ]| Here is a simple pipeline that displays a static text in the top left
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* corner of the video picture
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* |[
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* gst-launch -v filesrc location=subtitles.srt ! subparse ! txt. videotestsrc ! timeoverlay ! textoverlay name=txt shaded-background=yes ! xvimagesink
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* ]| Here is another pipeline that displays subtitles from an .srt subtitle
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* file, centered at the bottom of the picture and with a rectangular shading
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* around the text in the background:
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* <para>
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* If you do not have such a subtitle file, create one looking like this
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* in a text editor:
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* |[
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* 1
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* 00:00:03,000 --> 00:00:05,000
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* Hello? (3-5s)
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*
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* 2
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* 00:00:08,000 --> 00:00:13,000
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* Yes, this is a subtitle. Don't
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* you like it? (8-13s)
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*
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* 3
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* 00:00:18,826 --> 00:01:02,886
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* Uh? What are you talking about?
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* I don't understand (18-62s)
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* ]|
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* </para>
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* </refsect2>
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*/
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/* FIXME: alloc segment as part of instance struct */
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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 "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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/* 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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* - make 'shading_value' a property (or enum: light/normal/dark/verydark)?
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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_VALIGN "baseline"
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#define DEFAULT_PROP_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_COLOR 0xffffffff
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#define DEFAULT_PROP_OUTLINE_COLOR 0xff000000
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/* make a property of me */
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#define DEFAULT_SHADING_VALUE -80
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#define MINIMUM_OUTLINE_OFFSET 1.0
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#define DEFAULT_SCALE_BASIS 640
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#define COMP_Y(ret, r, g, b) \
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{ \
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ret = (int) (((19595 * r) >> 16) + ((38470 * g) >> 16) + ((7471 * b) >> 16)); \
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ret = CLAMP (ret, 0, 255); \
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}
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#define COMP_U(ret, r, g, b) \
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{ \
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ret = (int) (-((11059 * r) >> 16) - ((21709 * g) >> 16) + ((32768 * b) >> 16) + 128); \
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ret = CLAMP (ret, 0, 255); \
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}
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#define COMP_V(ret, r, g, b) \
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{ \
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ret = (int) (((32768 * r) >> 16) - ((27439 * g) >> 16) - ((5329 * b) >> 16) + 128); \
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ret = CLAMP (ret, 0, 255); \
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}
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#define BLEND(ret, alpha, v0, v1) \
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{ \
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ret = (v0 * alpha + v1 * (255 - alpha)) / 255; \
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}
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#define OVER(ret, alphaA, Ca, alphaB, Cb, alphaNew) \
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{ \
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gint _tmp; \
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_tmp = (Ca * alphaA + Cb * alphaB * (255 - alphaA) / 255) / alphaNew; \
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ret = CLAMP (_tmp, 0, 255); \
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}
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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# define CAIRO_ARGB_A 3
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# define CAIRO_ARGB_R 2
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# define CAIRO_ARGB_G 1
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# define CAIRO_ARGB_B 0
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#else
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# define CAIRO_ARGB_A 0
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# define CAIRO_ARGB_R 1
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# define CAIRO_ARGB_G 2
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# define CAIRO_ARGB_B 3
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#endif
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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_VALIGN, /* deprecated */
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PROP_HALIGN, /* deprecated */
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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_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_COLOR,
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PROP_SHADOW,
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PROP_OUTLINE_COLOR,
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PROP_LAST
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};
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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 (GST_VIDEO_CAPS_BGRx ";"
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GST_VIDEO_CAPS_RGBx ";"
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GST_VIDEO_CAPS_xRGB ";"
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GST_VIDEO_CAPS_xBGR ";"
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GST_VIDEO_CAPS_RGBA ";"
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GST_VIDEO_CAPS_BGRA ";"
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GST_VIDEO_CAPS_ARGB ";"
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GST_VIDEO_CAPS_ABGR ";"
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GST_VIDEO_CAPS_YUV ("{AYUV, I420, UYVY, NV12, NV21}"))
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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 (GST_VIDEO_CAPS_BGRx ";"
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GST_VIDEO_CAPS_RGBx ";"
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GST_VIDEO_CAPS_xRGB ";"
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GST_VIDEO_CAPS_xBGR ";"
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GST_VIDEO_CAPS_RGBA ";"
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GST_VIDEO_CAPS_BGRA ";"
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GST_VIDEO_CAPS_ARGB ";"
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GST_VIDEO_CAPS_ABGR ";"
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GST_VIDEO_CAPS_YUV ("{AYUV, I420, UYVY, NV12, NV21}"))
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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", "position"},
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{GST_BASE_TEXT_OVERLAY_VALIGN_CENTER, "center", "center"},
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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", "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_BASE_TEXT_OVERLAY_GET_COND(ov) (((GstBaseTextOverlay *)ov)->cond)
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#define GST_BASE_TEXT_OVERLAY_WAIT(ov) (g_cond_wait (GST_BASE_TEXT_OVERLAY_GET_COND (ov), GST_OBJECT_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_getcaps (GstPad * pad, GstCaps * filter);
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static gboolean gst_base_text_overlay_setcaps (GstPad * pad, GstCaps * caps);
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static gboolean gst_base_text_overlay_setcaps_txt (GstPad * pad,
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GstCaps * caps);
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static gboolean gst_base_text_overlay_src_event (GstPad * pad,
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GstEvent * event);
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static gboolean gst_base_text_overlay_src_query (GstPad * pad,
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GstQuery * query);
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static gboolean gst_base_text_overlay_video_event (GstPad * pad,
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GstEvent * event);
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static GstFlowReturn gst_base_text_overlay_video_chain (GstPad * pad,
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GstBuffer * buffer);
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static gboolean gst_base_text_overlay_text_event (GstPad * pad,
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GstEvent * event);
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static GstFlowReturn gst_base_text_overlay_text_chain (GstPad * pad,
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GstBuffer * buffer);
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static GstPadLinkReturn gst_base_text_overlay_text_pad_link (GstPad * pad,
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GstPad * peer);
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static void gst_base_text_overlay_text_pad_unlink (GstPad * pad);
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static void gst_base_text_overlay_pop_text (GstBaseTextOverlay * overlay);
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static void gst_base_text_overlay_update_render_mode (GstBaseTextOverlay *
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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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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_cairo_font_map_create_context (PANGO_CAIRO_FONT_MAP (fontmap));
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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_pad_template (gstelement_class,
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gst_static_pad_template_get (&src_template_factory));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&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_mutex_new ();
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|
|
klass->get_text = gst_base_text_overlay_get_text;
|
|
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TEXT,
|
|
g_param_spec_string ("text", "text",
|
|
"Text to be display.", DEFAULT_PROP_TEXT,
|
|
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SHADING,
|
|
g_param_spec_boolean ("shaded-background", "shaded background",
|
|
"Whether to shade the background under the text area",
|
|
DEFAULT_PROP_SHADING, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_VALIGNMENT,
|
|
g_param_spec_enum ("valignment", "vertical alignment",
|
|
"Vertical alignment of the text", GST_TYPE_BASE_TEXT_OVERLAY_VALIGN,
|
|
DEFAULT_PROP_VALIGNMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_HALIGNMENT,
|
|
g_param_spec_enum ("halignment", "horizontal alignment",
|
|
"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_VALIGN,
|
|
g_param_spec_string ("valign", "vertical alignment",
|
|
"Vertical alignment of the text (deprecated; use valignment)",
|
|
DEFAULT_PROP_VALIGN, G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_HALIGN,
|
|
g_param_spec_string ("halign", "horizontal alignment",
|
|
"Horizontal alignment of the text (deprecated; use halignment)",
|
|
DEFAULT_PROP_HALIGN, G_PARAM_WRITABLE | 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,
|
|
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, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
/**
|
|
* GstBaseTextOverlay:xpos
|
|
*
|
|
* Horizontal position of the rendered text when using positioned alignment.
|
|
*
|
|
* Since: 0.10.31
|
|
**/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_XPOS,
|
|
g_param_spec_double ("xpos", "horizontal position",
|
|
"Horizontal position when using 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.
|
|
*
|
|
* Since: 0.10.31
|
|
**/
|
|
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_YPOS,
|
|
g_param_spec_double ("ypos", "vertical position",
|
|
"Vertical position when using position alignment", 0, 1.0,
|
|
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_WRITABLE | G_PARAM_STATIC_STRINGS));
|
|
/**
|
|
* GstBaseTextOverlay:color
|
|
*
|
|
* Color of the rendered text.
|
|
*
|
|
* Since: 0.10.31
|
|
**/
|
|
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.
|
|
*
|
|
* Since: 0.10.35
|
|
**/
|
|
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)
|
|
*
|
|
* Since: 0.10.15
|
|
**/
|
|
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.
|
|
*
|
|
* Since: 0.10.15
|
|
**/
|
|
/* 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: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.
|
|
*
|
|
* Since: 0.10.20
|
|
**/
|
|
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));
|
|
}
|
|
|
|
static void
|
|
gst_base_text_overlay_finalize (GObject * object)
|
|
{
|
|
GstBaseTextOverlay *overlay = GST_BASE_TEXT_OVERLAY (object);
|
|
|
|
g_free (overlay->default_text);
|
|
|
|
if (overlay->text_image) {
|
|
g_free (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;
|
|
}
|
|
|
|
if (overlay->cond) {
|
|
g_cond_free (overlay->cond);
|
|
overlay->cond = NULL;
|
|
}
|
|
|
|
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_getcaps_function (overlay->video_sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_text_overlay_getcaps));
|
|
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_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_object_unref (template);
|
|
|
|
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_getcaps_function (overlay->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_base_text_overlay_getcaps));
|
|
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->line_align = DEFAULT_PROP_LINE_ALIGNMENT;
|
|
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_SHADING_VALUE;
|
|
overlay->silent = DEFAULT_PROP_SILENT;
|
|
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;
|
|
gst_base_text_overlay_update_render_mode (overlay);
|
|
|
|
overlay->fps_n = 0;
|
|
overlay->fps_d = 1;
|
|
|
|
overlay->text_buffer = NULL;
|
|
overlay->text_linked = FALSE;
|
|
overlay->cond = g_cond_new ();
|
|
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_update_wrap_mode (GstBaseTextOverlay * overlay)
|
|
{
|
|
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 {
|
|
int width;
|
|
|
|
if (overlay->auto_adjust_size) {
|
|
width = DEFAULT_SCALE_BASIS * PANGO_SCALE;
|
|
if (overlay->use_vertical_render) {
|
|
width = width * (overlay->height - overlay->ypad * 2) / overlay->width;
|
|
}
|
|
} else {
|
|
width =
|
|
(overlay->use_vertical_render ? overlay->height : overlay->width) *
|
|
PANGO_SCALE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (overlay, "Set layout width %d", overlay->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 void
|
|
gst_base_text_overlay_update_render_mode (GstBaseTextOverlay * overlay)
|
|
{
|
|
PangoMatrix matrix = PANGO_MATRIX_INIT;
|
|
PangoContext *context = pango_layout_get_context (overlay->layout);
|
|
|
|
if (overlay->use_vertical_render) {
|
|
pango_matrix_rotate (&matrix, -90);
|
|
pango_context_set_base_gravity (context, PANGO_GRAVITY_AUTO);
|
|
pango_context_set_matrix (context, &matrix);
|
|
pango_layout_set_alignment (overlay->layout, PANGO_ALIGN_LEFT);
|
|
} else {
|
|
pango_context_set_base_gravity (context, PANGO_GRAVITY_SOUTH);
|
|
pango_context_set_matrix (context, &matrix);
|
|
pango_layout_set_alignment (overlay->layout, overlay->line_align);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_text_overlay_setcaps_txt (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstBaseTextOverlay *overlay;
|
|
GstStructure *structure;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (gst_pad_get_parent (pad));
|
|
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
overlay->have_pango_markup =
|
|
gst_structure_has_name (structure, "text/x-pango-markup");
|
|
|
|
gst_object_unref (overlay);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* FIXME: upstream nego (e.g. when the video window is resized) */
|
|
|
|
static gboolean
|
|
gst_base_text_overlay_setcaps (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstBaseTextOverlay *overlay;
|
|
GstStructure *structure;
|
|
gboolean ret = FALSE;
|
|
const GValue *fps;
|
|
|
|
if (!GST_PAD_IS_SINK (pad))
|
|
return TRUE;
|
|
|
|
g_return_val_if_fail (gst_caps_is_fixed (caps), FALSE);
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (gst_pad_get_parent (pad));
|
|
|
|
overlay->width = 0;
|
|
overlay->height = 0;
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
fps = gst_structure_get_value (structure, "framerate");
|
|
|
|
if (fps
|
|
&& gst_video_format_parse_caps (caps, &overlay->format, &overlay->width,
|
|
&overlay->height)) {
|
|
ret = gst_pad_push_event (overlay->srcpad, gst_event_new_caps (caps));
|
|
}
|
|
|
|
overlay->fps_n = gst_value_get_fraction_numerator (fps);
|
|
overlay->fps_d = gst_value_get_fraction_denominator (fps);
|
|
|
|
if (ret) {
|
|
GST_OBJECT_LOCK (overlay);
|
|
g_mutex_lock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
gst_base_text_overlay_update_wrap_mode (overlay);
|
|
g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
GST_OBJECT_UNLOCK (overlay);
|
|
}
|
|
|
|
gst_object_unref (overlay);
|
|
|
|
return ret;
|
|
}
|
|
|
|
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_OBJECT_LOCK (overlay);
|
|
switch (prop_id) {
|
|
case PROP_TEXT:
|
|
g_free (overlay->default_text);
|
|
overlay->default_text = g_value_dup_string (value);
|
|
overlay->need_render = TRUE;
|
|
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_HALIGN:{
|
|
const gchar *s = g_value_get_string (value);
|
|
|
|
if (s && g_ascii_strcasecmp (s, "left") == 0)
|
|
overlay->halign = GST_BASE_TEXT_OVERLAY_HALIGN_LEFT;
|
|
else if (s && g_ascii_strcasecmp (s, "center") == 0)
|
|
overlay->halign = GST_BASE_TEXT_OVERLAY_HALIGN_CENTER;
|
|
else if (s && g_ascii_strcasecmp (s, "right") == 0)
|
|
overlay->halign = GST_BASE_TEXT_OVERLAY_HALIGN_RIGHT;
|
|
else
|
|
g_warning ("Invalid value '%s' for textoverlay property 'halign'",
|
|
GST_STR_NULL (s));
|
|
break;
|
|
}
|
|
case PROP_VALIGN:{
|
|
const gchar *s = g_value_get_string (value);
|
|
|
|
if (s && g_ascii_strcasecmp (s, "baseline") == 0)
|
|
overlay->valign = GST_BASE_TEXT_OVERLAY_VALIGN_BASELINE;
|
|
else if (s && g_ascii_strcasecmp (s, "bottom") == 0)
|
|
overlay->valign = GST_BASE_TEXT_OVERLAY_VALIGN_BOTTOM;
|
|
else if (s && g_ascii_strcasecmp (s, "top") == 0)
|
|
overlay->valign = GST_BASE_TEXT_OVERLAY_VALIGN_TOP;
|
|
else
|
|
g_warning ("Invalid value '%s' for textoverlay property 'valign'",
|
|
GST_STR_NULL (s));
|
|
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);
|
|
g_mutex_lock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
gst_base_text_overlay_update_wrap_mode (overlay);
|
|
g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
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_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);
|
|
overlay->need_render = TRUE;
|
|
break;
|
|
case PROP_VERTICAL_RENDER:
|
|
overlay->use_vertical_render = g_value_get_boolean (value);
|
|
g_mutex_lock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
gst_base_text_overlay_update_render_mode (overlay);
|
|
g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
overlay->need_render = TRUE;
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
|
|
overlay->need_render = TRUE;
|
|
GST_OBJECT_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_OBJECT_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_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_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_COLOR:
|
|
g_value_set_uint (value, overlay->color);
|
|
break;
|
|
case PROP_OUTLINE_COLOR:
|
|
g_value_set_uint (value, overlay->outline_color);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
|
|
overlay->need_render = TRUE;
|
|
GST_OBJECT_UNLOCK (overlay);
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_text_overlay_src_query (GstPad * pad, GstQuery * query)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstBaseTextOverlay *overlay = NULL;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (gst_pad_get_parent (pad));
|
|
|
|
ret = gst_pad_peer_query (overlay->video_sinkpad, query);
|
|
|
|
gst_object_unref (overlay);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_text_overlay_src_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstBaseTextOverlay *overlay = NULL;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (gst_pad_get_parent (pad));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_SEEK:{
|
|
GstSeekFlags flags;
|
|
|
|
/* We don't handle seek if we have not text pad */
|
|
if (!overlay->text_linked) {
|
|
GST_DEBUG_OBJECT (overlay, "seek received, pushing upstream");
|
|
ret = gst_pad_push_event (overlay->video_sinkpad, event);
|
|
goto beach;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (overlay, "seek received, driving from here");
|
|
|
|
gst_event_parse_seek (event, NULL, NULL, &flags, NULL, NULL, NULL, NULL);
|
|
|
|
/* Flush downstream, only for flushing seek */
|
|
if (flags & GST_SEEK_FLAG_FLUSH)
|
|
gst_pad_push_event (overlay->srcpad, gst_event_new_flush_start ());
|
|
|
|
/* Mark ourself as flushing, unblock chains */
|
|
GST_OBJECT_LOCK (overlay);
|
|
overlay->video_flushing = TRUE;
|
|
overlay->text_flushing = TRUE;
|
|
gst_base_text_overlay_pop_text (overlay);
|
|
GST_OBJECT_UNLOCK (overlay);
|
|
|
|
/* Seek on each sink pad */
|
|
gst_event_ref (event);
|
|
ret = gst_pad_push_event (overlay->video_sinkpad, event);
|
|
if (ret) {
|
|
ret = gst_pad_push_event (overlay->text_sinkpad, event);
|
|
} else {
|
|
gst_event_unref (event);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
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);
|
|
}
|
|
break;
|
|
}
|
|
|
|
beach:
|
|
gst_object_unref (overlay);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_base_text_overlay_getcaps (GstPad * pad, GstCaps * filter)
|
|
{
|
|
GstBaseTextOverlay *overlay;
|
|
GstPad *otherpad;
|
|
GstCaps *caps;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (gst_pad_get_parent (pad));
|
|
|
|
if (pad == overlay->srcpad)
|
|
otherpad = overlay->video_sinkpad;
|
|
else
|
|
otherpad = overlay->srcpad;
|
|
|
|
/* we can do what the peer can */
|
|
caps = gst_pad_peer_get_caps (otherpad, filter);
|
|
if (caps) {
|
|
GstCaps *temp, *templ;
|
|
|
|
GST_DEBUG_OBJECT (pad, "peer caps %" GST_PTR_FORMAT, caps);
|
|
|
|
/* filtered against our padtemplate */
|
|
templ = gst_pad_get_pad_template_caps (otherpad);
|
|
GST_DEBUG_OBJECT (pad, "our template %" GST_PTR_FORMAT, templ);
|
|
temp = gst_caps_intersect_full (caps, templ, GST_CAPS_INTERSECT_FIRST);
|
|
GST_DEBUG_OBJECT (pad, "intersected %" GST_PTR_FORMAT, temp);
|
|
gst_caps_unref (caps);
|
|
gst_caps_unref (templ);
|
|
/* this is what we can do */
|
|
caps = temp;
|
|
} 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);
|
|
|
|
gst_object_unref (overlay);
|
|
|
|
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;
|
|
}
|
|
|
|
#define CAIRO_UNPREMULTIPLY(a,r,g,b) G_STMT_START { \
|
|
b = (a > 0) ? MIN ((b * 255 + a / 2) / a, 255) : 0; \
|
|
g = (a > 0) ? MIN ((g * 255 + a / 2) / a, 255) : 0; \
|
|
r = (a > 0) ? MIN ((r * 255 + a / 2) / a, 255) : 0; \
|
|
} G_STMT_END
|
|
|
|
static inline void
|
|
gst_base_text_overlay_blit_1 (GstBaseTextOverlay * overlay, guchar * dest,
|
|
gint xpos, gint ypos, guchar * text_image, guint dest_stride)
|
|
{
|
|
gint i, j = 0;
|
|
gint x, y;
|
|
guchar r, g, b, a;
|
|
guchar *pimage;
|
|
guchar *py;
|
|
gint width = overlay->image_width;
|
|
gint height = overlay->image_height;
|
|
|
|
if (xpos < 0) {
|
|
xpos = 0;
|
|
}
|
|
|
|
if (xpos + width > overlay->width) {
|
|
width = overlay->width - xpos;
|
|
}
|
|
|
|
if (ypos + height > overlay->height) {
|
|
height = overlay->height - ypos;
|
|
}
|
|
|
|
dest += (ypos / 1) * dest_stride;
|
|
|
|
for (i = 0; i < height; i++) {
|
|
pimage = text_image + 4 * (i * overlay->image_width);
|
|
py = dest + i * dest_stride + xpos;
|
|
for (j = 0; j < width; j++) {
|
|
b = pimage[CAIRO_ARGB_B];
|
|
g = pimage[CAIRO_ARGB_G];
|
|
r = pimage[CAIRO_ARGB_R];
|
|
a = pimage[CAIRO_ARGB_A];
|
|
CAIRO_UNPREMULTIPLY (a, r, g, b);
|
|
|
|
pimage += 4;
|
|
if (a == 0) {
|
|
py++;
|
|
continue;
|
|
}
|
|
COMP_Y (y, r, g, b);
|
|
x = *py;
|
|
BLEND (*py++, a, y, x);
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
gst_base_text_overlay_blit_sub2x2cbcr (GstBaseTextOverlay * overlay,
|
|
guchar * destcb, guchar * destcr, gint xpos, gint ypos, guchar * text_image,
|
|
guint destcb_stride, guint destcr_stride, guint pix_stride)
|
|
{
|
|
gint i, j;
|
|
gint x, cb, cr;
|
|
gushort r, g, b, a;
|
|
gushort r1, g1, b1, a1;
|
|
guchar *pimage1, *pimage2;
|
|
guchar *pcb, *pcr;
|
|
gint width = overlay->image_width - 2;
|
|
gint height = overlay->image_height - 2;
|
|
|
|
xpos *= pix_stride;
|
|
|
|
if (xpos < 0) {
|
|
xpos = 0;
|
|
}
|
|
|
|
if (xpos + width > overlay->width) {
|
|
width = overlay->width - xpos;
|
|
}
|
|
|
|
if (ypos + height > overlay->height) {
|
|
height = overlay->height - ypos;
|
|
}
|
|
|
|
destcb += (ypos / 2) * destcb_stride;
|
|
destcr += (ypos / 2) * destcr_stride;
|
|
|
|
for (i = 0; i < height; i += 2) {
|
|
pimage1 = text_image + 4 * (i * overlay->image_width);
|
|
pimage2 = pimage1 + 4 * overlay->image_width;
|
|
pcb = destcb + (i / 2) * destcb_stride + xpos / 2;
|
|
pcr = destcr + (i / 2) * destcr_stride + xpos / 2;
|
|
for (j = 0; j < width; j += 2) {
|
|
b = pimage1[CAIRO_ARGB_B];
|
|
g = pimage1[CAIRO_ARGB_G];
|
|
r = pimage1[CAIRO_ARGB_R];
|
|
a = pimage1[CAIRO_ARGB_A];
|
|
CAIRO_UNPREMULTIPLY (a, r, g, b);
|
|
pimage1 += 4;
|
|
|
|
b1 = pimage1[CAIRO_ARGB_B];
|
|
g1 = pimage1[CAIRO_ARGB_G];
|
|
r1 = pimage1[CAIRO_ARGB_R];
|
|
a1 = pimage1[CAIRO_ARGB_A];
|
|
CAIRO_UNPREMULTIPLY (a1, r1, g1, b1);
|
|
b += b1;
|
|
g += g1;
|
|
r += r1;
|
|
a += a1;
|
|
pimage1 += 4;
|
|
|
|
b1 = pimage2[CAIRO_ARGB_B];
|
|
g1 = pimage2[CAIRO_ARGB_G];
|
|
r1 = pimage2[CAIRO_ARGB_R];
|
|
a1 = pimage2[CAIRO_ARGB_A];
|
|
CAIRO_UNPREMULTIPLY (a1, r1, g1, b1);
|
|
b += b1;
|
|
g += g1;
|
|
r += r1;
|
|
a += a1;
|
|
pimage2 += 4;
|
|
|
|
/* + 2 for rounding */
|
|
b1 = pimage2[CAIRO_ARGB_B];
|
|
g1 = pimage2[CAIRO_ARGB_G];
|
|
r1 = pimage2[CAIRO_ARGB_R];
|
|
a1 = pimage2[CAIRO_ARGB_A];
|
|
CAIRO_UNPREMULTIPLY (a1, r1, g1, b1);
|
|
b += b1 + 2;
|
|
g += g1 + 2;
|
|
r += r1 + 2;
|
|
a += a1 + 2;
|
|
pimage2 += 4;
|
|
|
|
b /= 4;
|
|
g /= 4;
|
|
r /= 4;
|
|
a /= 4;
|
|
|
|
if (a == 0) {
|
|
pcb += pix_stride;
|
|
pcr += pix_stride;
|
|
continue;
|
|
}
|
|
COMP_U (cb, r, g, b);
|
|
COMP_V (cr, r, g, b);
|
|
|
|
x = *pcb;
|
|
BLEND (*pcb, a, cb, x);
|
|
x = *pcr;
|
|
BLEND (*pcr, a, cr, x);
|
|
|
|
pcb += pix_stride;
|
|
pcr += pix_stride;
|
|
}
|
|
}
|
|
}
|
|
|
|
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;
|
|
int width, height;
|
|
double scalef = 1.0;
|
|
double a, r, g, b;
|
|
|
|
g_mutex_lock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
|
|
if (overlay->auto_adjust_size) {
|
|
/* 640 pixel is default */
|
|
scalef = (double) (overlay->width) / DEFAULT_SCALE_BASIS;
|
|
}
|
|
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);
|
|
|
|
width = (logical_rect.width + overlay->shadow_offset) * scalef;
|
|
|
|
if (width + overlay->deltax >
|
|
(overlay->use_vertical_render ? overlay->height : overlay->width)) {
|
|
/*
|
|
* subtitle image width is larger then overlay width
|
|
* so rearrange overlay wrap mode.
|
|
*/
|
|
gst_base_text_overlay_update_wrap_mode (overlay);
|
|
pango_layout_get_pixel_extents (overlay->layout, &ink_rect, &logical_rect);
|
|
width = overlay->width;
|
|
}
|
|
|
|
height =
|
|
(logical_rect.height + logical_rect.y + overlay->shadow_offset) * scalef;
|
|
if (height > overlay->height) {
|
|
height = overlay->height;
|
|
}
|
|
if (overlay->use_vertical_render) {
|
|
PangoRectangle rect;
|
|
PangoContext *context;
|
|
PangoMatrix matrix = PANGO_MATRIX_INIT;
|
|
int tmp;
|
|
|
|
context = pango_layout_get_context (overlay->layout);
|
|
|
|
pango_matrix_rotate (&matrix, -90);
|
|
|
|
rect.x = rect.y = 0;
|
|
rect.width = width;
|
|
rect.height = height;
|
|
pango_matrix_transform_pixel_rectangle (&matrix, &rect);
|
|
matrix.x0 = -rect.x;
|
|
matrix.y0 = -rect.y;
|
|
|
|
pango_context_set_matrix (context, &matrix);
|
|
|
|
cairo_matrix.xx = matrix.xx;
|
|
cairo_matrix.yx = matrix.yx;
|
|
cairo_matrix.xy = matrix.xy;
|
|
cairo_matrix.yy = matrix.yy;
|
|
cairo_matrix.x0 = matrix.x0;
|
|
cairo_matrix.y0 = matrix.y0;
|
|
cairo_matrix_scale (&cairo_matrix, scalef, scalef);
|
|
|
|
tmp = height;
|
|
height = width;
|
|
width = tmp;
|
|
} else {
|
|
cairo_matrix_init_scale (&cairo_matrix, scalef, scalef);
|
|
}
|
|
|
|
/* reallocate surface */
|
|
overlay->text_image = g_realloc (overlay->text_image, 4 * width * height);
|
|
|
|
surface = cairo_image_surface_create_for_data (overlay->text_image,
|
|
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);
|
|
|
|
if (overlay->want_shading)
|
|
cairo_paint_with_alpha (cr, overlay->shading_value);
|
|
|
|
/* 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 */
|
|
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_cairo_show_layout (cr, overlay->layout);
|
|
cairo_restore (cr);
|
|
|
|
a = (overlay->outline_color >> 24) & 0xff;
|
|
r = (overlay->outline_color >> 16) & 0xff;
|
|
g = (overlay->outline_color >> 8) & 0xff;
|
|
b = (overlay->outline_color >> 0) & 0xff;
|
|
|
|
/* draw outline text */
|
|
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);
|
|
overlay->image_width = width;
|
|
overlay->image_height = height;
|
|
overlay->baseline_y = ink_rect.y;
|
|
g_mutex_unlock (GST_BASE_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
|
|
}
|
|
|
|
#define BOX_XPAD 6
|
|
#define BOX_YPAD 6
|
|
|
|
static inline void
|
|
gst_base_text_overlay_shade_planar_Y (GstBaseTextOverlay * overlay,
|
|
guchar * dest, gint x0, gint x1, gint y0, gint y1)
|
|
{
|
|
gint i, j, dest_stride;
|
|
|
|
dest_stride = gst_video_format_get_row_stride (overlay->format, 0,
|
|
overlay->width);
|
|
|
|
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);
|
|
|
|
for (i = y0; i < y1; ++i) {
|
|
for (j = x0; j < x1; ++j) {
|
|
gint y = dest[(i * dest_stride) + j] + overlay->shading_value;
|
|
|
|
dest[(i * dest_stride) + j] = CLAMP (y, 0, 255);
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
gst_base_text_overlay_shade_packed_Y (GstBaseTextOverlay * overlay,
|
|
guchar * dest, gint x0, gint x1, gint y0, gint y1)
|
|
{
|
|
gint i, j;
|
|
guint dest_stride, pixel_stride, component_offset;
|
|
|
|
dest_stride = gst_video_format_get_row_stride (overlay->format, 0,
|
|
overlay->width);
|
|
pixel_stride = gst_video_format_get_pixel_stride (overlay->format, 0);
|
|
component_offset =
|
|
gst_video_format_get_component_offset (overlay->format, 0, overlay->width,
|
|
overlay->height);
|
|
|
|
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);
|
|
|
|
if (x0 != 0)
|
|
x0 = gst_video_format_get_component_width (overlay->format, 0, x0);
|
|
if (x1 != 0)
|
|
x1 = gst_video_format_get_component_width (overlay->format, 0, x1);
|
|
|
|
if (y0 != 0)
|
|
y0 = gst_video_format_get_component_height (overlay->format, 0, y0);
|
|
if (y1 != 0)
|
|
y1 = gst_video_format_get_component_height (overlay->format, 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 + component_offset;
|
|
y = dest[y_pos] + overlay->shading_value;
|
|
|
|
dest[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, guchar * dest,
|
|
gint x0, gint x1, gint y0, gint y1)
|
|
{
|
|
gint i, j;
|
|
|
|
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);
|
|
|
|
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[y_pos + k] + overlay->shading_value;
|
|
dest[y_pos + k] = CLAMP (y, 0, 255);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#define ARGB_SHADE_FUNCTION(name, OFFSET) \
|
|
static inline void \
|
|
gst_base_text_overlay_shade_##name (GstBaseTextOverlay * overlay, guchar * dest, \
|
|
gint x0, gint x1, gint y0, gint y1) \
|
|
{ \
|
|
gint i, j;\
|
|
\
|
|
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);\
|
|
\
|
|
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[y_pos + k] + overlay->shading_value;\
|
|
dest[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);
|
|
|
|
|
|
/* FIXME:
|
|
* - use proper strides and offset for I420
|
|
* - don't draw over the edge of the picture (try a longer
|
|
* text with a huge font size)
|
|
*/
|
|
|
|
static inline void
|
|
gst_base_text_overlay_blit_NV12_NV21 (GstBaseTextOverlay * overlay,
|
|
guint8 * yuv_pixels, gint xpos, gint ypos)
|
|
{
|
|
int y_stride, uv_stride;
|
|
int u_offset, v_offset;
|
|
int h, w;
|
|
|
|
/* because U/V is 2x2 subsampled, we need to round, either up or down,
|
|
* to a boundary of integer number of U/V pixels:
|
|
*/
|
|
xpos = GST_ROUND_UP_2 (xpos);
|
|
ypos = GST_ROUND_UP_2 (ypos);
|
|
|
|
w = overlay->width;
|
|
h = overlay->height;
|
|
|
|
y_stride = gst_video_format_get_row_stride (overlay->format, 0, w);
|
|
uv_stride = gst_video_format_get_row_stride (overlay->format, 1, w);
|
|
u_offset = gst_video_format_get_component_offset (overlay->format, 1, w, h);
|
|
v_offset = gst_video_format_get_component_offset (overlay->format, 2, w, h);
|
|
|
|
gst_base_text_overlay_blit_1 (overlay, yuv_pixels, xpos, ypos,
|
|
overlay->text_image, y_stride);
|
|
gst_base_text_overlay_blit_sub2x2cbcr (overlay, yuv_pixels + u_offset,
|
|
yuv_pixels + v_offset, xpos, ypos, overlay->text_image, uv_stride,
|
|
uv_stride, 2);
|
|
}
|
|
|
|
static inline void
|
|
gst_base_text_overlay_blit_I420 (GstBaseTextOverlay * overlay,
|
|
guint8 * yuv_pixels, gint xpos, gint ypos)
|
|
{
|
|
int y_stride, u_stride, v_stride;
|
|
int u_offset, v_offset;
|
|
int h, w;
|
|
|
|
/* because U/V is 2x2 subsampled, we need to round, either up or down,
|
|
* to a boundary of integer number of U/V pixels:
|
|
*/
|
|
xpos = GST_ROUND_UP_2 (xpos);
|
|
ypos = GST_ROUND_UP_2 (ypos);
|
|
|
|
w = overlay->width;
|
|
h = overlay->height;
|
|
|
|
y_stride = gst_video_format_get_row_stride (GST_VIDEO_FORMAT_I420, 0, w);
|
|
u_stride = gst_video_format_get_row_stride (GST_VIDEO_FORMAT_I420, 1, w);
|
|
v_stride = gst_video_format_get_row_stride (GST_VIDEO_FORMAT_I420, 2, w);
|
|
u_offset =
|
|
gst_video_format_get_component_offset (GST_VIDEO_FORMAT_I420, 1, w, h);
|
|
v_offset =
|
|
gst_video_format_get_component_offset (GST_VIDEO_FORMAT_I420, 2, w, h);
|
|
|
|
gst_base_text_overlay_blit_1 (overlay, yuv_pixels, xpos, ypos,
|
|
overlay->text_image, y_stride);
|
|
gst_base_text_overlay_blit_sub2x2cbcr (overlay, yuv_pixels + u_offset,
|
|
yuv_pixels + v_offset, xpos, ypos, overlay->text_image, u_stride,
|
|
v_stride, 1);
|
|
}
|
|
|
|
static inline void
|
|
gst_base_text_overlay_blit_UYVY (GstBaseTextOverlay * overlay,
|
|
guint8 * yuv_pixels, gint xpos, gint ypos)
|
|
{
|
|
int a0, r0, g0, b0;
|
|
int a1, r1, g1, b1;
|
|
int y0, y1, u, v;
|
|
int i, j;
|
|
int h, w;
|
|
guchar *pimage, *dest;
|
|
|
|
/* because U/V is 2x horizontally subsampled, we need to round to a
|
|
* boundary of integer number of U/V pixels in x dimension:
|
|
*/
|
|
xpos = GST_ROUND_UP_2 (xpos);
|
|
|
|
w = overlay->image_width - 2;
|
|
h = overlay->image_height - 2;
|
|
|
|
if (xpos < 0) {
|
|
xpos = 0;
|
|
}
|
|
|
|
if (xpos + w > overlay->width) {
|
|
w = overlay->width - xpos;
|
|
}
|
|
|
|
if (ypos + h > overlay->height) {
|
|
h = overlay->height - ypos;
|
|
}
|
|
|
|
for (i = 0; i < h; i++) {
|
|
pimage = overlay->text_image + i * overlay->image_width * 4;
|
|
dest = yuv_pixels + (i + ypos) * overlay->width * 2 + xpos * 2;
|
|
for (j = 0; j < w; j += 2) {
|
|
b0 = pimage[CAIRO_ARGB_B];
|
|
g0 = pimage[CAIRO_ARGB_G];
|
|
r0 = pimage[CAIRO_ARGB_R];
|
|
a0 = pimage[CAIRO_ARGB_A];
|
|
CAIRO_UNPREMULTIPLY (a0, r0, g0, b0);
|
|
pimage += 4;
|
|
|
|
b1 = pimage[CAIRO_ARGB_B];
|
|
g1 = pimage[CAIRO_ARGB_G];
|
|
r1 = pimage[CAIRO_ARGB_R];
|
|
a1 = pimage[CAIRO_ARGB_A];
|
|
CAIRO_UNPREMULTIPLY (a1, r1, g1, b1);
|
|
pimage += 4;
|
|
|
|
a0 += a1 + 2;
|
|
a0 /= 2;
|
|
if (a0 == 0) {
|
|
dest += 4;
|
|
continue;
|
|
}
|
|
|
|
COMP_Y (y0, r0, g0, b0);
|
|
COMP_Y (y1, r1, g1, b1);
|
|
|
|
b0 += b1 + 2;
|
|
g0 += g1 + 2;
|
|
r0 += r1 + 2;
|
|
|
|
b0 /= 2;
|
|
g0 /= 2;
|
|
r0 /= 2;
|
|
|
|
COMP_U (u, r0, g0, b0);
|
|
COMP_V (v, r0, g0, b0);
|
|
|
|
BLEND (*dest, a0, u, *dest);
|
|
dest++;
|
|
BLEND (*dest, a0, y0, *dest);
|
|
dest++;
|
|
BLEND (*dest, a0, v, *dest);
|
|
dest++;
|
|
BLEND (*dest, a0, y1, *dest);
|
|
dest++;
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
gst_base_text_overlay_blit_AYUV (GstBaseTextOverlay * overlay,
|
|
guint8 * rgb_pixels, gint xpos, gint ypos)
|
|
{
|
|
int a, r, g, b, a1;
|
|
int y, u, v;
|
|
int i, j;
|
|
int h, w;
|
|
guchar *pimage, *dest;
|
|
|
|
w = overlay->image_width;
|
|
h = overlay->image_height;
|
|
|
|
if (xpos < 0) {
|
|
xpos = 0;
|
|
}
|
|
|
|
if (xpos + w > overlay->width) {
|
|
w = overlay->width - xpos;
|
|
}
|
|
|
|
if (ypos + h > overlay->height) {
|
|
h = overlay->height - ypos;
|
|
}
|
|
|
|
for (i = 0; i < h; i++) {
|
|
pimage = overlay->text_image + i * overlay->image_width * 4;
|
|
dest = rgb_pixels + (i + ypos) * 4 * overlay->width + xpos * 4;
|
|
for (j = 0; j < w; j++) {
|
|
a = pimage[CAIRO_ARGB_A];
|
|
b = pimage[CAIRO_ARGB_B];
|
|
g = pimage[CAIRO_ARGB_G];
|
|
r = pimage[CAIRO_ARGB_R];
|
|
|
|
CAIRO_UNPREMULTIPLY (a, r, g, b);
|
|
|
|
// convert background to yuv
|
|
COMP_Y (y, r, g, b);
|
|
COMP_U (u, r, g, b);
|
|
COMP_V (v, r, g, b);
|
|
|
|
// preform text "OVER" background alpha compositing
|
|
a1 = a + (dest[0] * (255 - a)) / 255 + 1; // add 1 to prevent divide by 0
|
|
OVER (dest[1], a, y, dest[0], dest[1], a1);
|
|
OVER (dest[2], a, u, dest[0], dest[2], a1);
|
|
OVER (dest[3], a, v, dest[0], dest[3], a1);
|
|
dest[0] = a1 - 1; // remove the temporary 1 we added
|
|
|
|
pimage += 4;
|
|
dest += 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
#define xRGB_BLIT_FUNCTION(name, R, G, B) \
|
|
static inline void \
|
|
gst_base_text_overlay_blit_##name (GstBaseTextOverlay * overlay, \
|
|
guint8 * rgb_pixels, gint xpos, gint ypos) \
|
|
{ \
|
|
int a, r, g, b; \
|
|
int i, j; \
|
|
int h, w; \
|
|
guchar *pimage, *dest; \
|
|
\
|
|
w = overlay->image_width; \
|
|
h = overlay->image_height; \
|
|
\
|
|
if (xpos < 0) { \
|
|
xpos = 0; \
|
|
} \
|
|
\
|
|
if (xpos + w > overlay->width) { \
|
|
w = overlay->width - xpos; \
|
|
} \
|
|
\
|
|
if (ypos + h > overlay->height) { \
|
|
h = overlay->height - ypos; \
|
|
} \
|
|
\
|
|
for (i = 0; i < h; i++) { \
|
|
pimage = overlay->text_image + i * overlay->image_width * 4; \
|
|
dest = rgb_pixels + (i + ypos) * 4 * overlay->width + xpos * 4; \
|
|
for (j = 0; j < w; j++) { \
|
|
a = pimage[CAIRO_ARGB_A]; \
|
|
b = pimage[CAIRO_ARGB_B]; \
|
|
g = pimage[CAIRO_ARGB_G]; \
|
|
r = pimage[CAIRO_ARGB_R]; \
|
|
CAIRO_UNPREMULTIPLY (a, r, g, b); \
|
|
b = (b*a + dest[B] * (255-a)) / 255; \
|
|
g = (g*a + dest[G] * (255-a)) / 255; \
|
|
r = (r*a + dest[R] * (255-a)) / 255; \
|
|
\
|
|
dest[B] = b; \
|
|
dest[G] = g; \
|
|
dest[R] = r; \
|
|
pimage += 4; \
|
|
dest += 4; \
|
|
} \
|
|
} \
|
|
}
|
|
xRGB_BLIT_FUNCTION (xRGB, 1, 2, 3);
|
|
xRGB_BLIT_FUNCTION (BGRx, 2, 1, 0);
|
|
xRGB_BLIT_FUNCTION (xBGR, 3, 2, 1);
|
|
xRGB_BLIT_FUNCTION (RGBx, 0, 1, 2);
|
|
|
|
#define ARGB_BLIT_FUNCTION(name, A, R, G, B) \
|
|
static inline void \
|
|
gst_base_text_overlay_blit_##name (GstBaseTextOverlay * overlay, \
|
|
guint8 * rgb_pixels, gint xpos, gint ypos) \
|
|
{ \
|
|
int a, r, g, b, a1; \
|
|
int i, j; \
|
|
int h, w; \
|
|
guchar *pimage, *dest; \
|
|
\
|
|
w = overlay->image_width; \
|
|
h = overlay->image_height; \
|
|
\
|
|
if (xpos < 0) { \
|
|
xpos = 0; \
|
|
} \
|
|
\
|
|
if (xpos + w > overlay->width) { \
|
|
w = overlay->width - xpos; \
|
|
} \
|
|
\
|
|
if (ypos + h > overlay->height) { \
|
|
h = overlay->height - ypos; \
|
|
} \
|
|
\
|
|
for (i = 0; i < h; i++) { \
|
|
pimage = overlay->text_image + i * overlay->image_width * 4; \
|
|
dest = rgb_pixels + (i + ypos) * 4 * overlay->width + xpos * 4; \
|
|
for (j = 0; j < w; j++) { \
|
|
a = pimage[CAIRO_ARGB_A]; \
|
|
b = pimage[CAIRO_ARGB_B]; \
|
|
g = pimage[CAIRO_ARGB_G]; \
|
|
r = pimage[CAIRO_ARGB_R]; \
|
|
CAIRO_UNPREMULTIPLY (a, r, g, b); \
|
|
a1 = a + (dest[A] * (255 - a)) / 255 + 1; \
|
|
OVER (dest[R], a, r, dest[0], dest[R], a1); \
|
|
OVER (dest[G], a, g, dest[0], dest[G], a1); \
|
|
OVER (dest[B], a, b, dest[0], dest[B], a1); \
|
|
dest[A] = a1 - 1; \
|
|
pimage += 4; \
|
|
dest += 4; \
|
|
} \
|
|
} \
|
|
}
|
|
ARGB_BLIT_FUNCTION (RGBA, 3, 0, 1, 2);
|
|
ARGB_BLIT_FUNCTION (BGRA, 3, 2, 1, 0);
|
|
ARGB_BLIT_FUNCTION (ARGB, 0, 1, 2, 3);
|
|
ARGB_BLIT_FUNCTION (ABGR, 0, 3, 2, 1);
|
|
|
|
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;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_base_text_overlay_push_frame (GstBaseTextOverlay * overlay,
|
|
GstBuffer * video_frame)
|
|
{
|
|
gint xpos, ypos;
|
|
gint width, height;
|
|
GstBaseTextOverlayVAlign valign;
|
|
GstBaseTextOverlayHAlign halign;
|
|
guint8 *data;
|
|
gsize size;
|
|
|
|
width = overlay->image_width;
|
|
height = overlay->image_height;
|
|
|
|
video_frame = gst_buffer_make_writable (video_frame);
|
|
|
|
data = gst_buffer_map (video_frame, &size, NULL, GST_MAP_WRITE);
|
|
|
|
if (overlay->use_vertical_render)
|
|
halign = GST_BASE_TEXT_OVERLAY_HALIGN_RIGHT;
|
|
else
|
|
halign = overlay->halign;
|
|
|
|
switch (halign) {
|
|
case GST_BASE_TEXT_OVERLAY_HALIGN_LEFT:
|
|
xpos = overlay->xpad;
|
|
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;
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_HALIGN_POS:
|
|
xpos = (gint) (overlay->width * overlay->xpos) - width / 2;
|
|
xpos = CLAMP (xpos, 0, overlay->width - width);
|
|
if (xpos < 0)
|
|
xpos = 0;
|
|
break;
|
|
default:
|
|
xpos = 0;
|
|
}
|
|
xpos += overlay->deltax;
|
|
|
|
if (overlay->use_vertical_render)
|
|
valign = GST_BASE_TEXT_OVERLAY_VALIGN_TOP;
|
|
else
|
|
valign = overlay->valign;
|
|
|
|
switch (valign) {
|
|
case GST_BASE_TEXT_OVERLAY_VALIGN_BOTTOM:
|
|
ypos = overlay->height - height - overlay->ypad;
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_VALIGN_BASELINE:
|
|
ypos = overlay->height - (height + overlay->ypad);
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_VALIGN_TOP:
|
|
ypos = overlay->ypad;
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_VALIGN_POS:
|
|
ypos = (gint) (overlay->height * overlay->ypos) - height / 2;
|
|
ypos = CLAMP (ypos, 0, overlay->height - height);
|
|
break;
|
|
case GST_BASE_TEXT_OVERLAY_VALIGN_CENTER:
|
|
ypos = (overlay->height - height) / 2;
|
|
break;
|
|
default:
|
|
ypos = overlay->ypad;
|
|
break;
|
|
}
|
|
ypos += overlay->deltay;
|
|
|
|
/* shaded background box */
|
|
if (overlay->want_shading) {
|
|
switch (overlay->format) {
|
|
case GST_VIDEO_FORMAT_I420:
|
|
case GST_VIDEO_FORMAT_NV12:
|
|
case GST_VIDEO_FORMAT_NV21:
|
|
gst_base_text_overlay_shade_planar_Y (overlay, data,
|
|
xpos, xpos + overlay->image_width,
|
|
ypos, ypos + overlay->image_height);
|
|
break;
|
|
case GST_VIDEO_FORMAT_AYUV:
|
|
case GST_VIDEO_FORMAT_UYVY:
|
|
gst_base_text_overlay_shade_packed_Y (overlay, data,
|
|
xpos, xpos + overlay->image_width,
|
|
ypos, ypos + overlay->image_height);
|
|
break;
|
|
case GST_VIDEO_FORMAT_xRGB:
|
|
gst_base_text_overlay_shade_xRGB (overlay, data,
|
|
xpos, xpos + overlay->image_width,
|
|
ypos, ypos + overlay->image_height);
|
|
break;
|
|
case GST_VIDEO_FORMAT_xBGR:
|
|
gst_base_text_overlay_shade_xBGR (overlay, data,
|
|
xpos, xpos + overlay->image_width,
|
|
ypos, ypos + overlay->image_height);
|
|
break;
|
|
case GST_VIDEO_FORMAT_BGRx:
|
|
gst_base_text_overlay_shade_BGRx (overlay, data,
|
|
xpos, xpos + overlay->image_width,
|
|
ypos, ypos + overlay->image_height);
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGBx:
|
|
gst_base_text_overlay_shade_RGBx (overlay, data,
|
|
xpos, xpos + overlay->image_width,
|
|
ypos, ypos + overlay->image_height);
|
|
break;
|
|
case GST_VIDEO_FORMAT_ARGB:
|
|
gst_base_text_overlay_shade_ARGB (overlay, data,
|
|
xpos, xpos + overlay->image_width,
|
|
ypos, ypos + overlay->image_height);
|
|
break;
|
|
case GST_VIDEO_FORMAT_ABGR:
|
|
gst_base_text_overlay_shade_ABGR (overlay, data,
|
|
xpos, xpos + overlay->image_width,
|
|
ypos, ypos + overlay->image_height);
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGBA:
|
|
gst_base_text_overlay_shade_RGBA (overlay, data,
|
|
xpos, xpos + overlay->image_width,
|
|
ypos, ypos + overlay->image_height);
|
|
break;
|
|
case GST_VIDEO_FORMAT_BGRA:
|
|
gst_base_text_overlay_shade_BGRA (overlay, data,
|
|
xpos, xpos + overlay->image_width,
|
|
ypos, ypos + overlay->image_height);
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
}
|
|
}
|
|
|
|
if (ypos < 0)
|
|
ypos = 0;
|
|
|
|
if (overlay->text_image) {
|
|
switch (overlay->format) {
|
|
case GST_VIDEO_FORMAT_I420:
|
|
gst_base_text_overlay_blit_I420 (overlay, data, xpos, ypos);
|
|
break;
|
|
case GST_VIDEO_FORMAT_NV12:
|
|
case GST_VIDEO_FORMAT_NV21:
|
|
gst_base_text_overlay_blit_NV12_NV21 (overlay, data, xpos, ypos);
|
|
break;
|
|
case GST_VIDEO_FORMAT_UYVY:
|
|
gst_base_text_overlay_blit_UYVY (overlay, data, xpos, ypos);
|
|
break;
|
|
case GST_VIDEO_FORMAT_AYUV:
|
|
gst_base_text_overlay_blit_AYUV (overlay, data, xpos, ypos);
|
|
break;
|
|
case GST_VIDEO_FORMAT_BGRx:
|
|
gst_base_text_overlay_blit_BGRx (overlay, data, xpos, ypos);
|
|
break;
|
|
case GST_VIDEO_FORMAT_xRGB:
|
|
gst_base_text_overlay_blit_xRGB (overlay, data, xpos, ypos);
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGBx:
|
|
gst_base_text_overlay_blit_RGBx (overlay, data, xpos, ypos);
|
|
break;
|
|
case GST_VIDEO_FORMAT_xBGR:
|
|
gst_base_text_overlay_blit_xBGR (overlay, data, xpos, ypos);
|
|
break;
|
|
case GST_VIDEO_FORMAT_ARGB:
|
|
gst_base_text_overlay_blit_ARGB (overlay, data, xpos, ypos);
|
|
break;
|
|
case GST_VIDEO_FORMAT_ABGR:
|
|
gst_base_text_overlay_blit_ABGR (overlay, data, xpos, ypos);
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGBA:
|
|
gst_base_text_overlay_blit_RGBA (overlay, data, xpos, ypos);
|
|
break;
|
|
case GST_VIDEO_FORMAT_BGRA:
|
|
gst_base_text_overlay_blit_BGRA (overlay, data, xpos, ypos);
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
}
|
|
}
|
|
gst_buffer_unmap (video_frame, data, size);
|
|
|
|
return gst_pad_push (overlay->srcpad, video_frame);
|
|
}
|
|
|
|
static GstPadLinkReturn
|
|
gst_base_text_overlay_text_pad_link (GstPad * pad, GstPad * peer)
|
|
{
|
|
GstBaseTextOverlay *overlay;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (gst_pad_get_parent (pad));
|
|
|
|
GST_DEBUG_OBJECT (overlay, "Text pad linked");
|
|
|
|
overlay->text_linked = TRUE;
|
|
|
|
gst_object_unref (overlay);
|
|
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
static void
|
|
gst_base_text_overlay_text_pad_unlink (GstPad * pad)
|
|
{
|
|
GstBaseTextOverlay *overlay;
|
|
|
|
/* don't use gst_pad_get_parent() here, will deadlock */
|
|
overlay = GST_BASE_TEXT_OVERLAY (GST_PAD_PARENT (pad));
|
|
|
|
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, GstEvent * event)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstBaseTextOverlay *overlay = NULL;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (gst_pad_get_parent (pad));
|
|
|
|
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 (pad, 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_OBJECT_LOCK (overlay);
|
|
gst_segment_copy_into (segment, &overlay->text_segment);
|
|
GST_DEBUG_OBJECT (overlay, "TEXT SEGMENT now: %" GST_SEGMENT_FORMAT,
|
|
&overlay->text_segment);
|
|
GST_OBJECT_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_OBJECT_LOCK (overlay);
|
|
GST_BASE_TEXT_OVERLAY_BROADCAST (overlay);
|
|
GST_OBJECT_UNLOCK (overlay);
|
|
break;
|
|
}
|
|
case GST_EVENT_FLUSH_STOP:
|
|
GST_OBJECT_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_OBJECT_UNLOCK (overlay);
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
case GST_EVENT_FLUSH_START:
|
|
GST_OBJECT_LOCK (overlay);
|
|
GST_INFO_OBJECT (overlay, "text flush start");
|
|
overlay->text_flushing = TRUE;
|
|
GST_BASE_TEXT_OVERLAY_BROADCAST (overlay);
|
|
GST_OBJECT_UNLOCK (overlay);
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
case GST_EVENT_EOS:
|
|
GST_OBJECT_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_OBJECT_UNLOCK (overlay);
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
default:
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
|
|
gst_object_unref (overlay);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_text_overlay_video_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstBaseTextOverlay *overlay = NULL;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (gst_pad_get_parent (pad));
|
|
|
|
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 (pad, 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_DEBUG_OBJECT (overlay, "VIDEO SEGMENT now: %" GST_SEGMENT_FORMAT,
|
|
&overlay->segment);
|
|
|
|
gst_segment_copy_into (segment, &overlay->segment);
|
|
} else {
|
|
GST_ELEMENT_WARNING (overlay, STREAM, MUX, (NULL),
|
|
("received non-TIME newsegment event on video input"));
|
|
}
|
|
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
case GST_EVENT_EOS:
|
|
GST_OBJECT_LOCK (overlay);
|
|
GST_INFO_OBJECT (overlay, "video EOS");
|
|
overlay->video_eos = TRUE;
|
|
GST_OBJECT_UNLOCK (overlay);
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
case GST_EVENT_FLUSH_START:
|
|
GST_OBJECT_LOCK (overlay);
|
|
GST_INFO_OBJECT (overlay, "video flush start");
|
|
overlay->video_flushing = TRUE;
|
|
GST_BASE_TEXT_OVERLAY_BROADCAST (overlay);
|
|
GST_OBJECT_UNLOCK (overlay);
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
case GST_EVENT_FLUSH_STOP:
|
|
GST_OBJECT_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_OBJECT_UNLOCK (overlay);
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
default:
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
|
|
gst_object_unref (overlay);
|
|
|
|
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, 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 (GST_PAD_PARENT (pad));
|
|
|
|
GST_OBJECT_LOCK (overlay);
|
|
|
|
if (overlay->text_flushing) {
|
|
GST_OBJECT_UNLOCK (overlay);
|
|
ret = GST_FLOW_WRONG_STATE;
|
|
GST_LOG_OBJECT (overlay, "text flushing");
|
|
goto beach;
|
|
}
|
|
|
|
if (overlay->text_eos) {
|
|
GST_OBJECT_UNLOCK (overlay);
|
|
ret = GST_FLOW_UNEXPECTED;
|
|
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) {
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
|
|
GST_BUFFER_TIMESTAMP (buffer) = clip_start;
|
|
else 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_OBJECT_UNLOCK (overlay);
|
|
ret = GST_FLOW_WRONG_STATE;
|
|
goto beach;
|
|
}
|
|
}
|
|
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
|
|
overlay->text_segment.position = clip_start;
|
|
|
|
overlay->text_buffer = buffer;
|
|
/* 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_OBJECT_UNLOCK (overlay);
|
|
|
|
beach:
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_base_text_overlay_video_chain (GstPad * pad, 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;
|
|
|
|
overlay = GST_BASE_TEXT_OVERLAY (GST_PAD_PARENT (pad));
|
|
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) {
|
|
GstCaps *caps;
|
|
GstStructure *s;
|
|
gint fps_num, fps_denom;
|
|
|
|
/* FIXME, store this in setcaps */
|
|
caps = gst_pad_get_current_caps (pad);
|
|
s = gst_caps_get_structure (caps, 0);
|
|
if (gst_structure_get_fraction (s, "framerate", &fps_num, &fps_denom) &&
|
|
fps_num && fps_denom) {
|
|
GST_DEBUG_OBJECT (overlay, "estimating duration based on framerate");
|
|
stop = start + gst_util_uint64_scale_int (GST_SECOND, fps_denom, fps_num);
|
|
} else {
|
|
GST_WARNING_OBJECT (overlay, "no duration, assuming minimal duration");
|
|
stop = start + 1; /* we need to assume some interval */
|
|
}
|
|
gst_caps_unref (caps);
|
|
}
|
|
|
|
gst_object_sync_values (G_OBJECT (overlay), GST_BUFFER_TIMESTAMP (buffer));
|
|
|
|
wait_for_text_buf:
|
|
|
|
GST_OBJECT_LOCK (overlay);
|
|
|
|
if (overlay->video_flushing)
|
|
goto flushing;
|
|
|
|
if (overlay->video_eos)
|
|
goto have_eos;
|
|
|
|
if (overlay->silent) {
|
|
GST_OBJECT_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_OBJECT_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->segment, GST_FORMAT_TIME,
|
|
text_start);
|
|
text_running_time_end =
|
|
gst_segment_to_running_time (&overlay->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_OBJECT_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_OBJECT_UNLOCK (overlay);
|
|
/* Push the video frame */
|
|
ret = gst_pad_push (overlay->srcpad, buffer);
|
|
} else {
|
|
gchar *in_text, *otext;
|
|
gsize in_size, osize;
|
|
|
|
otext =
|
|
gst_buffer_map (overlay->text_buffer, &osize, NULL, GST_MAP_READ);
|
|
in_text = otext;
|
|
in_size = osize;
|
|
|
|
/* 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);
|
|
}
|
|
gst_buffer_unmap (overlay->text_buffer, otext, osize);
|
|
|
|
if (in_text != otext)
|
|
g_free (in_text);
|
|
|
|
GST_OBJECT_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_OBJECT_LOCK (overlay);
|
|
gst_base_text_overlay_pop_text (overlay);
|
|
GST_OBJECT_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_OBJECT_UNLOCK (overlay);
|
|
goto wait_for_text_buf;
|
|
} else {
|
|
GST_OBJECT_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_OBJECT_UNLOCK (overlay);
|
|
GST_DEBUG_OBJECT (overlay, "flushing, discarding buffer");
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
have_eos:
|
|
{
|
|
GST_OBJECT_UNLOCK (overlay);
|
|
GST_DEBUG_OBJECT (overlay, "eos, discarding buffer");
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_UNEXPECTED;
|
|
}
|
|
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_OBJECT_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_OBJECT_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_OBJECT_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_OBJECT_UNLOCK (overlay);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
gst_controller_init (NULL, NULL);
|
|
|
|
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)
|