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9e3b63e109
Fixes CID #1405133.
3058 lines
94 KiB
C
3058 lines
94 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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* Copyright (C) <2015> British Broadcasting Corporation <dash@rd.bbc.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-ttmlrender
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* @title: ttmlrender
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*
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* Renders timed text on top of a video stream. It receives text in buffers
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* from a ttmlparse element; each text string is in its own #GstMemory within
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* the GstBuffer, and the styling and layout associated with each text string
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* is in metadata attached to the #GstBuffer.
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*
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* ## Example launch lines
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* |[
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* gst-launch-1.0 filesrc location=<media file location> ! video/quicktime ! qtdemux name=q ttmlrender name=r q. ! queue ! h264parse ! avdec_h264 ! autovideoconvert ! r.video_sink filesrc location=<subtitle file location> blocksize=16777216 ! queue ! ttmlparse ! r.text_sink r. ! ximagesink q. ! queue ! aacparse ! avdec_aac ! audioconvert ! alsasink
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* ]| Parse and render TTML subtitles contained in a single XML file over an
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* MP4 stream containing H.264 video and AAC audio:
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*
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*/
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#include <gst/video/video.h>
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#include <gst/video/gstvideometa.h>
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#include <gst/video/video-overlay-composition.h>
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#include <pango/pangocairo.h>
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#include <string.h>
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#include <math.h>
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#include "gstttmlrender.h"
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#include "subtitle.h"
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#include "subtitlemeta.h"
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#define VIDEO_FORMATS GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS
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#define TTML_RENDER_CAPS GST_VIDEO_CAPS_MAKE (VIDEO_FORMATS)
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#define TTML_RENDER_ALL_CAPS TTML_RENDER_CAPS ";" \
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GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("ANY", GST_VIDEO_FORMATS_ALL)
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GST_DEBUG_CATEGORY_EXTERN (ttmlrender_debug);
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#define GST_CAT_DEFAULT ttmlrender_debug
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static GstStaticCaps sw_template_caps = GST_STATIC_CAPS (TTML_RENDER_CAPS);
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static GstStaticPadTemplate src_template_factory =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (TTML_RENDER_ALL_CAPS)
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);
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static GstStaticPadTemplate video_sink_template_factory =
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GST_STATIC_PAD_TEMPLATE ("video_sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (TTML_RENDER_ALL_CAPS)
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);
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static GstStaticPadTemplate text_sink_template_factory =
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GST_STATIC_PAD_TEMPLATE ("text_sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("text/x-raw(meta:GstSubtitleMeta)")
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);
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#define GST_TTML_RENDER_GET_LOCK(ov) (&GST_TTML_RENDER (ov)->lock)
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#define GST_TTML_RENDER_GET_COND(ov) (&GST_TTML_RENDER (ov)->cond)
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#define GST_TTML_RENDER_LOCK(ov) (g_mutex_lock (GST_TTML_RENDER_GET_LOCK (ov)))
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#define GST_TTML_RENDER_UNLOCK(ov) (g_mutex_unlock (GST_TTML_RENDER_GET_LOCK (ov)))
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#define GST_TTML_RENDER_WAIT(ov) (g_cond_wait (GST_TTML_RENDER_GET_COND (ov), GST_TTML_RENDER_GET_LOCK (ov)))
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#define GST_TTML_RENDER_SIGNAL(ov) (g_cond_signal (GST_TTML_RENDER_GET_COND (ov)))
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#define GST_TTML_RENDER_BROADCAST(ov)(g_cond_broadcast (GST_TTML_RENDER_GET_COND (ov)))
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typedef enum
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{
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GST_TTML_DIRECTION_INLINE,
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GST_TTML_DIRECTION_BLOCK
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} GstTtmlDirection;
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typedef struct
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{
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guint line_height;
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guint baseline_offset;
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} BlockMetrics;
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typedef struct
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{
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guint height;
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guint baseline;
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} FontMetrics;
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typedef struct
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{
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guint first_index;
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guint last_index;
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} CharRange;
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/* @pango_font_size is the font size you would need to tell pango in order that
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* the actual rendered height of @text matches the text height in @element's
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* style set. */
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typedef struct
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{
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GstSubtitleElement *element;
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guint pango_font_size;
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FontMetrics pango_font_metrics;
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gchar *text;
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} UnifiedElement;
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typedef struct
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{
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GPtrArray *unified_elements;
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GstSubtitleStyleSet *style_set;
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gchar *joined_text;
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} UnifiedBlock;
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static GstElementClass *parent_class = NULL;
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static void gst_ttml_render_base_init (gpointer g_class);
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static void gst_ttml_render_class_init (GstTtmlRenderClass * klass);
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static void gst_ttml_render_init (GstTtmlRender * render,
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GstTtmlRenderClass * klass);
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static GstStateChangeReturn gst_ttml_render_change_state (GstElement *
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element, GstStateChange transition);
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static GstCaps *gst_ttml_render_get_videosink_caps (GstPad * pad,
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GstTtmlRender * render, GstCaps * filter);
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static GstCaps *gst_ttml_render_get_src_caps (GstPad * pad,
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GstTtmlRender * render, GstCaps * filter);
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static gboolean gst_ttml_render_setcaps (GstTtmlRender * render,
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GstCaps * caps);
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static gboolean gst_ttml_render_src_event (GstPad * pad,
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GstObject * parent, GstEvent * event);
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static gboolean gst_ttml_render_src_query (GstPad * pad,
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GstObject * parent, GstQuery * query);
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static gboolean gst_ttml_render_video_event (GstPad * pad,
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GstObject * parent, GstEvent * event);
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static gboolean gst_ttml_render_video_query (GstPad * pad,
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GstObject * parent, GstQuery * query);
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static GstFlowReturn gst_ttml_render_video_chain (GstPad * pad,
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GstObject * parent, GstBuffer * buffer);
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static gboolean gst_ttml_render_text_event (GstPad * pad,
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GstObject * parent, GstEvent * event);
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static GstFlowReturn gst_ttml_render_text_chain (GstPad * pad,
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GstObject * parent, GstBuffer * buffer);
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static GstPadLinkReturn gst_ttml_render_text_pad_link (GstPad * pad,
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GstObject * parent, GstPad * peer);
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static void gst_ttml_render_text_pad_unlink (GstPad * pad, GstObject * parent);
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static void gst_ttml_render_pop_text (GstTtmlRender * render);
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static void gst_ttml_render_finalize (GObject * object);
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static gboolean gst_ttml_render_can_handle_caps (GstCaps * incaps);
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static GstTtmlRenderRenderedImage *gst_ttml_render_rendered_image_new
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(GstBuffer * image, gint x, gint y, guint width, guint height);
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static GstTtmlRenderRenderedImage *gst_ttml_render_rendered_image_new_empty
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(void);
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static GstTtmlRenderRenderedImage *gst_ttml_render_rendered_image_copy
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(GstTtmlRenderRenderedImage * image);
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static void gst_ttml_render_rendered_image_free
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(GstTtmlRenderRenderedImage * image);
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static GstTtmlRenderRenderedImage *gst_ttml_render_rendered_image_combine
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(GstTtmlRenderRenderedImage * image1, GstTtmlRenderRenderedImage * image2);
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static GstTtmlRenderRenderedImage *gst_ttml_render_stitch_images (GPtrArray *
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images, GstTtmlDirection direction);
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static gboolean gst_ttml_render_color_is_transparent (GstSubtitleColor * color);
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GType
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gst_ttml_render_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 (GstTtmlRenderClass),
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(GBaseInitFunc) gst_ttml_render_base_init,
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NULL,
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(GClassInitFunc) gst_ttml_render_class_init,
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NULL,
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NULL,
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sizeof (GstTtmlRender),
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0,
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(GInstanceInitFunc) gst_ttml_render_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, "GstTtmlRender", &info, 0));
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}
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return type;
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}
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static void
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gst_ttml_render_base_init (gpointer g_class)
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{
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GstTtmlRenderClass *klass = GST_TTML_RENDER_CLASS (g_class);
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PangoFontMap *fontmap;
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/* Only lock for the subclasses here, the base class
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* doesn't have this mutex yet and it's not necessary
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* here */
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if (klass->pango_lock)
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g_mutex_lock (klass->pango_lock);
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fontmap = pango_cairo_font_map_get_default ();
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klass->pango_context =
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pango_font_map_create_context (PANGO_FONT_MAP (fontmap));
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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_ttml_render_class_init (GstTtmlRenderClass * 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_ttml_render_finalize;
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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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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&text_sink_template_factory));
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gst_element_class_set_static_metadata (gstelement_class,
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"TTML subtitle renderer", "Overlay/Subtitle",
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"Renders timed-text subtitles on top of video buffers",
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"David Schleef <ds@schleef.org>, Zeeshan Ali <zeeshan.ali@nokia.com>, "
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"Chris Bass <dash@rd.bbc.co.uk>");
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_ttml_render_change_state);
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klass->pango_lock = g_slice_new (GMutex);
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g_mutex_init (klass->pango_lock);
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}
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static void
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gst_ttml_render_finalize (GObject * object)
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{
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GstTtmlRender *render = GST_TTML_RENDER (object);
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if (render->compositions) {
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g_list_free_full (render->compositions,
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(GDestroyNotify) gst_video_overlay_composition_unref);
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render->compositions = NULL;
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}
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if (render->text_buffer) {
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gst_buffer_unref (render->text_buffer);
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render->text_buffer = NULL;
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}
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if (render->layout) {
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g_object_unref (render->layout);
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render->layout = NULL;
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}
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g_mutex_clear (&render->lock);
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g_cond_clear (&render->cond);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_ttml_render_init (GstTtmlRender * render, GstTtmlRenderClass * klass)
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{
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GstPadTemplate *template;
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/* video sink */
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template = gst_static_pad_template_get (&video_sink_template_factory);
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render->video_sinkpad = gst_pad_new_from_template (template, "video_sink");
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gst_object_unref (template);
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gst_pad_set_event_function (render->video_sinkpad,
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GST_DEBUG_FUNCPTR (gst_ttml_render_video_event));
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gst_pad_set_chain_function (render->video_sinkpad,
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GST_DEBUG_FUNCPTR (gst_ttml_render_video_chain));
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gst_pad_set_query_function (render->video_sinkpad,
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GST_DEBUG_FUNCPTR (gst_ttml_render_video_query));
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GST_PAD_SET_PROXY_ALLOCATION (render->video_sinkpad);
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gst_element_add_pad (GST_ELEMENT (render), render->video_sinkpad);
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template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass),
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"text_sink");
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if (template) {
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/* text sink */
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render->text_sinkpad = gst_pad_new_from_template (template, "text_sink");
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gst_pad_set_event_function (render->text_sinkpad,
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GST_DEBUG_FUNCPTR (gst_ttml_render_text_event));
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gst_pad_set_chain_function (render->text_sinkpad,
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GST_DEBUG_FUNCPTR (gst_ttml_render_text_chain));
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gst_pad_set_link_function (render->text_sinkpad,
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GST_DEBUG_FUNCPTR (gst_ttml_render_text_pad_link));
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gst_pad_set_unlink_function (render->text_sinkpad,
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GST_DEBUG_FUNCPTR (gst_ttml_render_text_pad_unlink));
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gst_element_add_pad (GST_ELEMENT (render), render->text_sinkpad);
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}
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/* (video) source */
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template = gst_static_pad_template_get (&src_template_factory);
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render->srcpad = gst_pad_new_from_template (template, "src");
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gst_object_unref (template);
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gst_pad_set_event_function (render->srcpad,
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GST_DEBUG_FUNCPTR (gst_ttml_render_src_event));
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gst_pad_set_query_function (render->srcpad,
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GST_DEBUG_FUNCPTR (gst_ttml_render_src_query));
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gst_element_add_pad (GST_ELEMENT (render), render->srcpad);
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g_mutex_lock (GST_TTML_RENDER_GET_CLASS (render)->pango_lock);
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render->wait_text = TRUE;
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render->need_render = TRUE;
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render->text_buffer = NULL;
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render->text_linked = FALSE;
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render->compositions = NULL;
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render->layout =
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pango_layout_new (GST_TTML_RENDER_GET_CLASS (render)->pango_context);
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g_mutex_init (&render->lock);
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g_cond_init (&render->cond);
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gst_segment_init (&render->segment, GST_FORMAT_TIME);
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g_mutex_unlock (GST_TTML_RENDER_GET_CLASS (render)->pango_lock);
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}
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/* only negotiate/query video render composition support for now */
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static gboolean
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gst_ttml_render_negotiate (GstTtmlRender * render, GstCaps * caps)
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{
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GstQuery *query;
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gboolean attach = FALSE;
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gboolean caps_has_meta = TRUE;
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gboolean ret;
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GstCapsFeatures *f;
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GstCaps *original_caps;
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gboolean original_has_meta = FALSE;
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gboolean allocation_ret = TRUE;
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GST_DEBUG_OBJECT (render, "performing negotiation");
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gst_pad_check_reconfigure (render->srcpad);
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if (!caps)
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caps = gst_pad_get_current_caps (render->video_sinkpad);
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else
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gst_caps_ref (caps);
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if (!caps || gst_caps_is_empty (caps))
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goto no_format;
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original_caps = caps;
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/* Try to use the render meta if possible */
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f = gst_caps_get_features (caps, 0);
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/* if the caps doesn't have the render meta, we query if downstream
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* accepts it before trying the version without the meta
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* If upstream already is using the meta then we can only use it */
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if (!f
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|| !gst_caps_features_contains (f,
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GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION)) {
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GstCaps *overlay_caps;
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/* In this case we added the meta, but we can work without it
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* so preserve the original caps so we can use it as a fallback */
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overlay_caps = gst_caps_copy (caps);
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f = gst_caps_get_features (overlay_caps, 0);
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gst_caps_features_add (f,
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GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION);
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ret = gst_pad_peer_query_accept_caps (render->srcpad, overlay_caps);
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GST_DEBUG_OBJECT (render, "Downstream accepts the render meta: %d", ret);
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if (ret) {
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gst_caps_unref (caps);
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caps = overlay_caps;
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} else {
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/* fallback to the original */
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gst_caps_unref (overlay_caps);
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caps_has_meta = FALSE;
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}
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} else {
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original_has_meta = TRUE;
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}
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GST_DEBUG_OBJECT (render, "Using caps %" GST_PTR_FORMAT, caps);
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ret = gst_pad_set_caps (render->srcpad, caps);
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if (ret) {
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/* find supported meta */
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query = gst_query_new_allocation (caps, FALSE);
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if (!gst_pad_peer_query (render->srcpad, query)) {
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/* no problem, we use the query defaults */
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GST_DEBUG_OBJECT (render, "ALLOCATION query failed");
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allocation_ret = FALSE;
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}
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|
|
|
if (caps_has_meta && gst_query_find_allocation_meta (query,
|
|
GST_VIDEO_OVERLAY_COMPOSITION_META_API_TYPE, NULL))
|
|
attach = TRUE;
|
|
|
|
gst_query_unref (query);
|
|
}
|
|
|
|
if (!allocation_ret && render->video_flushing) {
|
|
ret = FALSE;
|
|
} else if (original_caps && !original_has_meta && !attach) {
|
|
if (caps_has_meta) {
|
|
/* Some elements (fakesink) claim to accept the meta on caps but won't
|
|
put it in the allocation query result, this leads below
|
|
check to fail. Prevent this by removing the meta from caps */
|
|
gst_caps_unref (caps);
|
|
caps = gst_caps_ref (original_caps);
|
|
ret = gst_pad_set_caps (render->srcpad, caps);
|
|
if (ret && !gst_ttml_render_can_handle_caps (caps))
|
|
ret = FALSE;
|
|
}
|
|
}
|
|
|
|
if (!ret) {
|
|
GST_DEBUG_OBJECT (render, "negotiation failed, schedule reconfigure");
|
|
gst_pad_mark_reconfigure (render->srcpad);
|
|
}
|
|
|
|
gst_caps_unref (caps);
|
|
|
|
if (!ret)
|
|
gst_pad_mark_reconfigure (render->srcpad);
|
|
|
|
return ret;
|
|
|
|
no_format:
|
|
{
|
|
if (caps)
|
|
gst_caps_unref (caps);
|
|
gst_pad_mark_reconfigure (render->srcpad);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_ttml_render_can_handle_caps (GstCaps * incaps)
|
|
{
|
|
gboolean ret;
|
|
GstCaps *caps;
|
|
static GstStaticCaps static_caps = GST_STATIC_CAPS (TTML_RENDER_CAPS);
|
|
|
|
caps = gst_static_caps_get (&static_caps);
|
|
ret = gst_caps_is_subset (incaps, caps);
|
|
gst_caps_unref (caps);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ttml_render_setcaps (GstTtmlRender * render, GstCaps * caps)
|
|
{
|
|
GstVideoInfo info;
|
|
gboolean ret = FALSE;
|
|
|
|
if (!gst_video_info_from_caps (&info, caps))
|
|
goto invalid_caps;
|
|
|
|
render->info = info;
|
|
render->format = GST_VIDEO_INFO_FORMAT (&info);
|
|
render->width = GST_VIDEO_INFO_WIDTH (&info);
|
|
render->height = GST_VIDEO_INFO_HEIGHT (&info);
|
|
|
|
ret = gst_ttml_render_negotiate (render, caps);
|
|
|
|
GST_TTML_RENDER_LOCK (render);
|
|
g_mutex_lock (GST_TTML_RENDER_GET_CLASS (render)->pango_lock);
|
|
if (!gst_ttml_render_can_handle_caps (caps)) {
|
|
GST_DEBUG_OBJECT (render, "unsupported caps %" GST_PTR_FORMAT, caps);
|
|
ret = FALSE;
|
|
}
|
|
|
|
g_mutex_unlock (GST_TTML_RENDER_GET_CLASS (render)->pango_lock);
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
invalid_caps:
|
|
{
|
|
GST_DEBUG_OBJECT (render, "could not parse caps");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
|
|
static gboolean
|
|
gst_ttml_render_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstTtmlRender *render;
|
|
|
|
render = GST_TTML_RENDER (parent);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_CAPS:
|
|
{
|
|
GstCaps *filter, *caps;
|
|
|
|
gst_query_parse_caps (query, &filter);
|
|
caps = gst_ttml_render_get_src_caps (pad, render, filter);
|
|
gst_query_set_caps_result (query, caps);
|
|
gst_caps_unref (caps);
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
default:
|
|
ret = gst_pad_query_default (pad, parent, query);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ttml_render_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
GstTtmlRender *render;
|
|
gboolean ret;
|
|
|
|
render = GST_TTML_RENDER (parent);
|
|
|
|
if (render->text_linked) {
|
|
gst_event_ref (event);
|
|
ret = gst_pad_push_event (render->video_sinkpad, event);
|
|
gst_pad_push_event (render->text_sinkpad, event);
|
|
} else {
|
|
ret = gst_pad_push_event (render->video_sinkpad, event);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_ttml_render_add_feature_and_intersect:
|
|
*
|
|
* Creates a new #GstCaps containing the (given caps +
|
|
* given caps feature) + (given caps intersected by the
|
|
* given filter).
|
|
*
|
|
* Returns: the new #GstCaps
|
|
*/
|
|
static GstCaps *
|
|
gst_ttml_render_add_feature_and_intersect (GstCaps * caps,
|
|
const gchar * feature, GstCaps * filter)
|
|
{
|
|
int i, caps_size;
|
|
GstCaps *new_caps;
|
|
|
|
new_caps = gst_caps_copy (caps);
|
|
|
|
caps_size = gst_caps_get_size (new_caps);
|
|
for (i = 0; i < caps_size; i++) {
|
|
GstCapsFeatures *features = gst_caps_get_features (new_caps, i);
|
|
|
|
if (!gst_caps_features_is_any (features)) {
|
|
gst_caps_features_add (features, feature);
|
|
}
|
|
}
|
|
|
|
gst_caps_append (new_caps, gst_caps_intersect_full (caps,
|
|
filter, GST_CAPS_INTERSECT_FIRST));
|
|
|
|
return new_caps;
|
|
}
|
|
|
|
/**
|
|
* gst_ttml_render_intersect_by_feature:
|
|
*
|
|
* Creates a new #GstCaps based on the following filtering rule.
|
|
*
|
|
* For each individual caps contained in given caps, if the
|
|
* caps uses the given caps feature, keep a version of the caps
|
|
* with the feature and an another one without. Otherwise, intersect
|
|
* the caps with the given filter.
|
|
*
|
|
* Returns: the new #GstCaps
|
|
*/
|
|
static GstCaps *
|
|
gst_ttml_render_intersect_by_feature (GstCaps * caps,
|
|
const gchar * feature, GstCaps * filter)
|
|
{
|
|
int i, caps_size;
|
|
GstCaps *new_caps;
|
|
|
|
new_caps = gst_caps_new_empty ();
|
|
|
|
caps_size = gst_caps_get_size (caps);
|
|
for (i = 0; i < caps_size; i++) {
|
|
GstStructure *caps_structure = gst_caps_get_structure (caps, i);
|
|
GstCapsFeatures *caps_features =
|
|
gst_caps_features_copy (gst_caps_get_features (caps, i));
|
|
GstCaps *filtered_caps;
|
|
GstCaps *simple_caps =
|
|
gst_caps_new_full (gst_structure_copy (caps_structure), NULL);
|
|
gst_caps_set_features (simple_caps, 0, caps_features);
|
|
|
|
if (gst_caps_features_contains (caps_features, feature)) {
|
|
gst_caps_append (new_caps, gst_caps_copy (simple_caps));
|
|
|
|
gst_caps_features_remove (caps_features, feature);
|
|
filtered_caps = gst_caps_ref (simple_caps);
|
|
} else {
|
|
filtered_caps = gst_caps_intersect_full (simple_caps, filter,
|
|
GST_CAPS_INTERSECT_FIRST);
|
|
}
|
|
|
|
gst_caps_unref (simple_caps);
|
|
gst_caps_append (new_caps, filtered_caps);
|
|
}
|
|
|
|
return new_caps;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_ttml_render_get_videosink_caps (GstPad * pad,
|
|
GstTtmlRender * render, GstCaps * filter)
|
|
{
|
|
GstPad *srcpad = render->srcpad;
|
|
GstCaps *peer_caps = NULL, *caps = NULL, *overlay_filter = NULL;
|
|
|
|
if (G_UNLIKELY (!render))
|
|
return gst_pad_get_pad_template_caps (pad);
|
|
|
|
if (filter) {
|
|
/* filter caps + composition feature + filter caps
|
|
* filtered by the software caps. */
|
|
GstCaps *sw_caps = gst_static_caps_get (&sw_template_caps);
|
|
overlay_filter = gst_ttml_render_add_feature_and_intersect (filter,
|
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION, sw_caps);
|
|
gst_caps_unref (sw_caps);
|
|
|
|
GST_DEBUG_OBJECT (render, "render filter %" GST_PTR_FORMAT, overlay_filter);
|
|
}
|
|
|
|
peer_caps = gst_pad_peer_query_caps (srcpad, overlay_filter);
|
|
|
|
if (overlay_filter)
|
|
gst_caps_unref (overlay_filter);
|
|
|
|
if (peer_caps) {
|
|
|
|
GST_DEBUG_OBJECT (pad, "peer caps %" GST_PTR_FORMAT, peer_caps);
|
|
|
|
if (gst_caps_is_any (peer_caps)) {
|
|
/* if peer returns ANY caps, return filtered src pad template caps */
|
|
caps = gst_caps_copy (gst_pad_get_pad_template_caps (srcpad));
|
|
} else {
|
|
|
|
/* duplicate caps which contains the composition into one version with
|
|
* the meta and one without. Filter the other caps by the software caps */
|
|
GstCaps *sw_caps = gst_static_caps_get (&sw_template_caps);
|
|
caps = gst_ttml_render_intersect_by_feature (peer_caps,
|
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION, sw_caps);
|
|
gst_caps_unref (sw_caps);
|
|
}
|
|
|
|
gst_caps_unref (peer_caps);
|
|
|
|
} else {
|
|
/* no peer, our padtemplate is enough then */
|
|
caps = gst_pad_get_pad_template_caps (pad);
|
|
}
|
|
|
|
if (filter) {
|
|
GstCaps *intersection = gst_caps_intersect_full (filter, caps,
|
|
GST_CAPS_INTERSECT_FIRST);
|
|
gst_caps_unref (caps);
|
|
caps = intersection;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (render, "returning %" GST_PTR_FORMAT, caps);
|
|
|
|
return caps;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_ttml_render_get_src_caps (GstPad * pad, GstTtmlRender * render,
|
|
GstCaps * filter)
|
|
{
|
|
GstPad *sinkpad = render->video_sinkpad;
|
|
GstCaps *peer_caps = NULL, *caps = NULL, *overlay_filter = NULL;
|
|
|
|
if (G_UNLIKELY (!render))
|
|
return gst_pad_get_pad_template_caps (pad);
|
|
|
|
if (filter) {
|
|
/* duplicate filter caps which contains the composition into one version
|
|
* with the meta and one without. Filter the other caps by the software
|
|
* caps */
|
|
GstCaps *sw_caps = gst_static_caps_get (&sw_template_caps);
|
|
overlay_filter =
|
|
gst_ttml_render_intersect_by_feature (filter,
|
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION, sw_caps);
|
|
gst_caps_unref (sw_caps);
|
|
}
|
|
|
|
peer_caps = gst_pad_peer_query_caps (sinkpad, overlay_filter);
|
|
|
|
if (overlay_filter)
|
|
gst_caps_unref (overlay_filter);
|
|
|
|
if (peer_caps) {
|
|
|
|
GST_DEBUG_OBJECT (pad, "peer caps %" GST_PTR_FORMAT, peer_caps);
|
|
|
|
if (gst_caps_is_any (peer_caps)) {
|
|
|
|
/* if peer returns ANY caps, return filtered sink pad template caps */
|
|
caps = gst_caps_copy (gst_pad_get_pad_template_caps (sinkpad));
|
|
|
|
} else {
|
|
|
|
/* return upstream caps + composition feature + upstream caps
|
|
* filtered by the software caps. */
|
|
GstCaps *sw_caps = gst_static_caps_get (&sw_template_caps);
|
|
caps = gst_ttml_render_add_feature_and_intersect (peer_caps,
|
|
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION, sw_caps);
|
|
gst_caps_unref (sw_caps);
|
|
}
|
|
|
|
gst_caps_unref (peer_caps);
|
|
|
|
} else {
|
|
/* no peer, our padtemplate is enough then */
|
|
caps = gst_pad_get_pad_template_caps (pad);
|
|
}
|
|
|
|
if (filter) {
|
|
GstCaps *intersection;
|
|
|
|
intersection =
|
|
gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
|
|
gst_caps_unref (caps);
|
|
caps = intersection;
|
|
}
|
|
GST_DEBUG_OBJECT (render, "returning %" GST_PTR_FORMAT, caps);
|
|
|
|
return caps;
|
|
}
|
|
|
|
|
|
static GstFlowReturn
|
|
gst_ttml_render_push_frame (GstTtmlRender * render, GstBuffer * video_frame)
|
|
{
|
|
GstVideoFrame frame;
|
|
GList *compositions = render->compositions;
|
|
|
|
if (compositions == NULL) {
|
|
GST_CAT_DEBUG (ttmlrender_debug, "No compositions.");
|
|
goto done;
|
|
}
|
|
|
|
if (gst_pad_check_reconfigure (render->srcpad)) {
|
|
if (!gst_ttml_render_negotiate (render, NULL)) {
|
|
gst_pad_mark_reconfigure (render->srcpad);
|
|
gst_buffer_unref (video_frame);
|
|
if (GST_PAD_IS_FLUSHING (render->srcpad))
|
|
return GST_FLOW_FLUSHING;
|
|
else
|
|
return GST_FLOW_NOT_NEGOTIATED;
|
|
}
|
|
}
|
|
|
|
video_frame = gst_buffer_make_writable (video_frame);
|
|
|
|
if (!gst_video_frame_map (&frame, &render->info, video_frame,
|
|
GST_MAP_READWRITE))
|
|
goto invalid_frame;
|
|
|
|
while (compositions) {
|
|
GstVideoOverlayComposition *composition = compositions->data;
|
|
gst_video_overlay_composition_blend (composition, &frame);
|
|
compositions = compositions->next;
|
|
}
|
|
|
|
gst_video_frame_unmap (&frame);
|
|
|
|
done:
|
|
|
|
return gst_pad_push (render->srcpad, video_frame);
|
|
|
|
/* ERRORS */
|
|
invalid_frame:
|
|
{
|
|
gst_buffer_unref (video_frame);
|
|
GST_DEBUG_OBJECT (render, "received invalid buffer");
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
static GstPadLinkReturn
|
|
gst_ttml_render_text_pad_link (GstPad * pad, GstObject * parent, GstPad * peer)
|
|
{
|
|
GstTtmlRender *render;
|
|
|
|
render = GST_TTML_RENDER (parent);
|
|
if (G_UNLIKELY (!render))
|
|
return GST_PAD_LINK_REFUSED;
|
|
|
|
GST_DEBUG_OBJECT (render, "Text pad linked");
|
|
|
|
render->text_linked = TRUE;
|
|
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
static void
|
|
gst_ttml_render_text_pad_unlink (GstPad * pad, GstObject * parent)
|
|
{
|
|
GstTtmlRender *render;
|
|
|
|
/* don't use gst_pad_get_parent() here, will deadlock */
|
|
render = GST_TTML_RENDER (parent);
|
|
|
|
GST_DEBUG_OBJECT (render, "Text pad unlinked");
|
|
|
|
render->text_linked = FALSE;
|
|
|
|
gst_segment_init (&render->text_segment, GST_FORMAT_UNDEFINED);
|
|
}
|
|
|
|
static gboolean
|
|
gst_ttml_render_text_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstTtmlRender *render = NULL;
|
|
|
|
render = GST_TTML_RENDER (parent);
|
|
|
|
GST_LOG_OBJECT (pad, "received event %s", GST_EVENT_TYPE_NAME (event));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_SEGMENT:
|
|
{
|
|
const GstSegment *segment;
|
|
|
|
render->text_eos = FALSE;
|
|
|
|
gst_event_parse_segment (event, &segment);
|
|
|
|
if (segment->format == GST_FORMAT_TIME) {
|
|
GST_TTML_RENDER_LOCK (render);
|
|
gst_segment_copy_into (segment, &render->text_segment);
|
|
GST_DEBUG_OBJECT (render, "TEXT SEGMENT now: %" GST_SEGMENT_FORMAT,
|
|
&render->text_segment);
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
} else {
|
|
GST_ELEMENT_WARNING (render, 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_TTML_RENDER_LOCK (render);
|
|
GST_TTML_RENDER_BROADCAST (render);
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
break;
|
|
}
|
|
case GST_EVENT_GAP:
|
|
{
|
|
GstClockTime start, duration;
|
|
|
|
gst_event_parse_gap (event, &start, &duration);
|
|
if (GST_CLOCK_TIME_IS_VALID (duration))
|
|
start += duration;
|
|
/* we do not expect another buffer until after gap,
|
|
* so that is our position now */
|
|
render->text_segment.position = start;
|
|
|
|
/* wake up the video chain, it might be waiting for a text buffer or
|
|
* a text segment update */
|
|
GST_TTML_RENDER_LOCK (render);
|
|
GST_TTML_RENDER_BROADCAST (render);
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
case GST_EVENT_FLUSH_STOP:
|
|
GST_TTML_RENDER_LOCK (render);
|
|
GST_INFO_OBJECT (render, "text flush stop");
|
|
render->text_flushing = FALSE;
|
|
render->text_eos = FALSE;
|
|
gst_ttml_render_pop_text (render);
|
|
gst_segment_init (&render->text_segment, GST_FORMAT_TIME);
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
case GST_EVENT_FLUSH_START:
|
|
GST_TTML_RENDER_LOCK (render);
|
|
GST_INFO_OBJECT (render, "text flush start");
|
|
render->text_flushing = TRUE;
|
|
GST_TTML_RENDER_BROADCAST (render);
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
case GST_EVENT_EOS:
|
|
GST_TTML_RENDER_LOCK (render);
|
|
render->text_eos = TRUE;
|
|
GST_INFO_OBJECT (render, "text EOS");
|
|
/* wake up the video chain, it might be waiting for a text buffer or
|
|
* a text segment update */
|
|
GST_TTML_RENDER_BROADCAST (render);
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
default:
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ttml_render_video_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstTtmlRender *render = NULL;
|
|
|
|
render = GST_TTML_RENDER (parent);
|
|
|
|
GST_DEBUG_OBJECT (pad, "received event %s", GST_EVENT_TYPE_NAME (event));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_CAPS:
|
|
{
|
|
GstCaps *caps;
|
|
gint prev_width = render->width;
|
|
gint prev_height = render->height;
|
|
|
|
gst_event_parse_caps (event, &caps);
|
|
ret = gst_ttml_render_setcaps (render, caps);
|
|
if (render->width != prev_width || render->height != prev_height)
|
|
render->need_render = TRUE;
|
|
gst_event_unref (event);
|
|
break;
|
|
}
|
|
case GST_EVENT_SEGMENT:
|
|
{
|
|
const GstSegment *segment;
|
|
|
|
GST_DEBUG_OBJECT (render, "received new segment");
|
|
|
|
gst_event_parse_segment (event, &segment);
|
|
|
|
if (segment->format == GST_FORMAT_TIME) {
|
|
GST_DEBUG_OBJECT (render, "VIDEO SEGMENT now: %" GST_SEGMENT_FORMAT,
|
|
&render->segment);
|
|
|
|
gst_segment_copy_into (segment, &render->segment);
|
|
} else {
|
|
GST_ELEMENT_WARNING (render, STREAM, MUX, (NULL),
|
|
("received non-TIME newsegment event on video input"));
|
|
}
|
|
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
}
|
|
case GST_EVENT_EOS:
|
|
GST_TTML_RENDER_LOCK (render);
|
|
GST_INFO_OBJECT (render, "video EOS");
|
|
render->video_eos = TRUE;
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
case GST_EVENT_FLUSH_START:
|
|
GST_TTML_RENDER_LOCK (render);
|
|
GST_INFO_OBJECT (render, "video flush start");
|
|
render->video_flushing = TRUE;
|
|
GST_TTML_RENDER_BROADCAST (render);
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
case GST_EVENT_FLUSH_STOP:
|
|
GST_TTML_RENDER_LOCK (render);
|
|
GST_INFO_OBJECT (render, "video flush stop");
|
|
render->video_flushing = FALSE;
|
|
render->video_eos = FALSE;
|
|
gst_segment_init (&render->segment, GST_FORMAT_TIME);
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
default:
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ttml_render_video_query (GstPad * pad, GstObject * parent, GstQuery * query)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstTtmlRender *render;
|
|
|
|
render = GST_TTML_RENDER (parent);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_CAPS:
|
|
{
|
|
GstCaps *filter, *caps;
|
|
|
|
gst_query_parse_caps (query, &filter);
|
|
caps = gst_ttml_render_get_videosink_caps (pad, render, filter);
|
|
gst_query_set_caps_result (query, caps);
|
|
gst_caps_unref (caps);
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
default:
|
|
ret = gst_pad_query_default (pad, parent, query);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Called with lock held */
|
|
static void
|
|
gst_ttml_render_pop_text (GstTtmlRender * render)
|
|
{
|
|
g_return_if_fail (GST_IS_TTML_RENDER (render));
|
|
|
|
if (render->text_buffer) {
|
|
GST_DEBUG_OBJECT (render, "releasing text buffer %p", render->text_buffer);
|
|
gst_buffer_unref (render->text_buffer);
|
|
render->text_buffer = NULL;
|
|
}
|
|
|
|
/* Let the text task know we used that buffer */
|
|
GST_TTML_RENDER_BROADCAST (render);
|
|
}
|
|
|
|
/* 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_ttml_render_text_chain (GstPad * pad, GstObject * parent,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstTtmlRender *render = NULL;
|
|
gboolean in_seg = FALSE;
|
|
guint64 clip_start = 0, clip_stop = 0;
|
|
|
|
render = GST_TTML_RENDER (parent);
|
|
|
|
GST_TTML_RENDER_LOCK (render);
|
|
|
|
if (render->text_flushing) {
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
ret = GST_FLOW_FLUSHING;
|
|
GST_LOG_OBJECT (render, "text flushing");
|
|
goto beach;
|
|
}
|
|
|
|
if (render->text_eos) {
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
ret = GST_FLOW_EOS;
|
|
GST_LOG_OBJECT (render, "text EOS");
|
|
goto beach;
|
|
}
|
|
|
|
GST_LOG_OBJECT (render, "%" GST_SEGMENT_FORMAT " BUFFER: ts=%"
|
|
GST_TIME_FORMAT ", end=%" GST_TIME_FORMAT, &render->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 (&render->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 (render->text_buffer != NULL) {
|
|
GST_DEBUG ("Pad %s:%s has a buffer queued, waiting",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
GST_TTML_RENDER_WAIT (render);
|
|
GST_DEBUG ("Pad %s:%s resuming", GST_DEBUG_PAD_NAME (pad));
|
|
if (render->text_flushing) {
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
ret = GST_FLOW_FLUSHING;
|
|
goto beach;
|
|
}
|
|
}
|
|
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
|
|
render->text_segment.position = clip_start;
|
|
|
|
render->text_buffer = buffer;
|
|
/* That's a new text buffer we need to render */
|
|
render->need_render = TRUE;
|
|
|
|
/* in case the video chain is waiting for a text buffer, wake it up */
|
|
GST_TTML_RENDER_BROADCAST (render);
|
|
}
|
|
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
|
|
beach:
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* Caller needs to free returned string after use. */
|
|
static gchar *
|
|
gst_ttml_render_color_to_string (GstSubtitleColor color)
|
|
{
|
|
#if PANGO_VERSION_CHECK (1,38,0)
|
|
return g_strdup_printf ("#%02x%02x%02x%02x",
|
|
color.r, color.g, color.b, color.a);
|
|
#else
|
|
return g_strdup_printf ("#%02x%02x%02x", color.r, color.g, color.b);
|
|
#endif
|
|
}
|
|
|
|
|
|
static GstBuffer *
|
|
gst_ttml_render_draw_rectangle (guint width, guint height,
|
|
GstSubtitleColor color)
|
|
{
|
|
GstMapInfo map;
|
|
cairo_surface_t *surface;
|
|
cairo_t *cairo_state;
|
|
GstBuffer *buffer = gst_buffer_new_allocate (NULL, 4 * width * height, NULL);
|
|
|
|
gst_buffer_map (buffer, &map, GST_MAP_READWRITE);
|
|
surface = cairo_image_surface_create_for_data (map.data,
|
|
CAIRO_FORMAT_ARGB32, width, height, width * 4);
|
|
cairo_state = cairo_create (surface);
|
|
|
|
/* clear surface */
|
|
cairo_set_operator (cairo_state, CAIRO_OPERATOR_CLEAR);
|
|
cairo_paint (cairo_state);
|
|
cairo_set_operator (cairo_state, CAIRO_OPERATOR_OVER);
|
|
|
|
cairo_save (cairo_state);
|
|
cairo_set_source_rgba (cairo_state, color.r / 255.0, color.g / 255.0,
|
|
color.b / 255.0, color.a / 255.0);
|
|
cairo_paint (cairo_state);
|
|
cairo_restore (cairo_state);
|
|
cairo_destroy (cairo_state);
|
|
cairo_surface_destroy (surface);
|
|
gst_buffer_unmap (buffer, &map);
|
|
|
|
return buffer;
|
|
}
|
|
|
|
|
|
static void
|
|
gst_ttml_render_char_range_free (CharRange * range)
|
|
{
|
|
g_slice_free (CharRange, range);
|
|
}
|
|
|
|
|
|
/* Choose fonts for generic fontnames based upon IMSC1 and HbbTV specs. */
|
|
static gchar *
|
|
gst_ttml_render_resolve_generic_fontname (const gchar * name)
|
|
{
|
|
if ((g_strcmp0 (name, "default") == 0)) {
|
|
return
|
|
g_strdup ("TiresiasScreenfont,Liberation Mono,Courier New,monospace");
|
|
} else if ((g_strcmp0 (name, "monospace") == 0)) {
|
|
return g_strdup ("Letter Gothic,Liberation Mono,Courier New,monospace");
|
|
} else if ((g_strcmp0 (name, "sansSerif") == 0)) {
|
|
return g_strdup ("TiresiasScreenfont,sans");
|
|
} else if ((g_strcmp0 (name, "serif") == 0)) {
|
|
return g_strdup ("serif");
|
|
} else if ((g_strcmp0 (name, "monospaceSansSerif") == 0)) {
|
|
return g_strdup ("Letter Gothic,monospace");
|
|
} else if ((g_strcmp0 (name, "monospaceSerif") == 0)) {
|
|
return g_strdup ("Courier New,Liberation Mono,monospace");
|
|
} else if ((g_strcmp0 (name, "proportionalSansSerif") == 0)) {
|
|
return g_strdup ("TiresiasScreenfont,Arial,Helvetica,Liberation Sans,sans");
|
|
} else if ((g_strcmp0 (name, "proportionalSerif") == 0)) {
|
|
return g_strdup ("serif");
|
|
} else {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
|
|
static gchar *
|
|
gst_ttml_render_get_text_from_buffer (GstBuffer * buf, guint index)
|
|
{
|
|
GstMapInfo map;
|
|
GstMemory *mem;
|
|
gchar *buf_text = NULL;
|
|
|
|
mem = gst_buffer_get_memory (buf, index);
|
|
if (!mem) {
|
|
GST_CAT_ERROR (ttmlrender_debug, "Failed to access memory at index %u.",
|
|
index);
|
|
return NULL;
|
|
}
|
|
|
|
if (!gst_memory_map (mem, &map, GST_MAP_READ)) {
|
|
GST_CAT_ERROR (ttmlrender_debug, "Failed to map memory at index %u.",
|
|
index);
|
|
goto map_fail;
|
|
}
|
|
|
|
buf_text = g_strndup ((const gchar *) map.data, map.size);
|
|
if (!g_utf8_validate (buf_text, -1, NULL)) {
|
|
GST_CAT_ERROR (ttmlrender_debug, "Text in buffer us not valid UTF-8");
|
|
g_free (buf_text);
|
|
buf_text = NULL;
|
|
}
|
|
|
|
gst_memory_unmap (mem, &map);
|
|
map_fail:
|
|
gst_memory_unref (mem);
|
|
return buf_text;
|
|
}
|
|
|
|
|
|
static void
|
|
gst_ttml_render_unified_element_free (UnifiedElement * unified_element)
|
|
{
|
|
if (!unified_element)
|
|
return;
|
|
|
|
gst_subtitle_element_unref (unified_element->element);
|
|
g_free (unified_element->text);
|
|
g_slice_free (UnifiedElement, unified_element);
|
|
}
|
|
|
|
|
|
static UnifiedElement *
|
|
gst_ttml_render_unified_element_copy (const UnifiedElement * unified_element)
|
|
{
|
|
UnifiedElement *ret;
|
|
|
|
if (!unified_element)
|
|
return NULL;
|
|
|
|
ret = g_slice_new0 (UnifiedElement);
|
|
ret->element = gst_subtitle_element_ref (unified_element->element);
|
|
ret->pango_font_size = unified_element->pango_font_size;
|
|
ret->pango_font_metrics.height = unified_element->pango_font_metrics.height;
|
|
ret->pango_font_metrics.baseline =
|
|
unified_element->pango_font_metrics.baseline;
|
|
ret->text = g_strdup (unified_element->text);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static void
|
|
gst_ttml_render_unified_block_free (UnifiedBlock * unified_block)
|
|
{
|
|
if (!unified_block)
|
|
return;
|
|
|
|
gst_subtitle_style_set_unref (unified_block->style_set);
|
|
g_ptr_array_unref (unified_block->unified_elements);
|
|
g_free (unified_block->joined_text);
|
|
g_slice_free (UnifiedBlock, unified_block);
|
|
}
|
|
|
|
|
|
static UnifiedElement *
|
|
gst_ttml_render_unified_block_get_element (const UnifiedBlock * block,
|
|
guint index)
|
|
{
|
|
if (index >= block->unified_elements->len)
|
|
return NULL;
|
|
else
|
|
return g_ptr_array_index (block->unified_elements, index);
|
|
}
|
|
|
|
|
|
static UnifiedBlock *
|
|
gst_ttml_render_unified_block_copy (const UnifiedBlock * block)
|
|
{
|
|
UnifiedBlock *ret;
|
|
gint i;
|
|
|
|
if (!block)
|
|
return NULL;
|
|
|
|
ret = g_slice_new0 (UnifiedBlock);
|
|
ret->joined_text = g_strdup (block->joined_text);
|
|
ret->style_set = gst_subtitle_style_set_ref (block->style_set);
|
|
ret->unified_elements = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
gst_ttml_render_unified_element_free);
|
|
|
|
for (i = 0; i < block->unified_elements->len; ++i) {
|
|
UnifiedElement *ue = gst_ttml_render_unified_block_get_element (block, i);
|
|
UnifiedElement *ue_copy = gst_ttml_render_unified_element_copy (ue);
|
|
g_ptr_array_add (ret->unified_elements, ue_copy);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static guint
|
|
gst_ttml_render_unified_block_element_count (const UnifiedBlock * block)
|
|
{
|
|
return block->unified_elements->len;
|
|
}
|
|
|
|
|
|
/*
|
|
* Generates pango-markup'd version of @text that would make pango render it
|
|
* with the styling specified by @style_set.
|
|
*/
|
|
static gchar *
|
|
gst_ttml_render_generate_pango_markup (GstSubtitleStyleSet * style_set,
|
|
guint font_height, const gchar * text)
|
|
{
|
|
gchar *ret, *font_family, *font_size, *fgcolor;
|
|
const gchar *font_style, *font_weight, *underline;
|
|
gchar *escaped_text = g_markup_escape_text (text, -1);
|
|
|
|
fgcolor = gst_ttml_render_color_to_string (style_set->color);
|
|
font_size = g_strdup_printf ("%u", font_height);
|
|
font_family =
|
|
gst_ttml_render_resolve_generic_fontname (style_set->font_family);
|
|
if (!font_family)
|
|
font_family = g_strdup (style_set->font_family);
|
|
font_style = (style_set->font_style ==
|
|
GST_SUBTITLE_FONT_STYLE_NORMAL) ? "normal" : "italic";
|
|
font_weight = (style_set->font_weight ==
|
|
GST_SUBTITLE_FONT_WEIGHT_NORMAL) ? "normal" : "bold";
|
|
underline = (style_set->text_decoration ==
|
|
GST_SUBTITLE_TEXT_DECORATION_UNDERLINE) ? "single" : "none";
|
|
|
|
ret = g_strconcat ("<span "
|
|
"fgcolor=\"", fgcolor, "\" ",
|
|
"font=\"", font_size, "px\" ",
|
|
"font_family=\"", font_family, "\" ",
|
|
"font_style=\"", font_style, "\" ",
|
|
"font_weight=\"", font_weight, "\" ",
|
|
"underline=\"", underline, "\" ", ">", escaped_text, "</span>", NULL);
|
|
|
|
g_free (fgcolor);
|
|
g_free (font_family);
|
|
g_free (font_size);
|
|
g_free (escaped_text);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Unfortunately, pango does not expose accurate metrics about fonts (their
|
|
* maximum height and baseline position), so we need to calculate this
|
|
* information ourselves by examining the ink rectangle of a string containing
|
|
* characters that extend to the maximum height/depth of the font.
|
|
*/
|
|
static FontMetrics
|
|
gst_ttml_render_get_pango_font_metrics (GstTtmlRender * render,
|
|
GstSubtitleStyleSet * style_set, guint font_size)
|
|
{
|
|
PangoRectangle ink_rect;
|
|
gchar *string;
|
|
FontMetrics ret;
|
|
|
|
string = gst_ttml_render_generate_pango_markup (style_set, font_size,
|
|
"Áĺľď¿gqy");
|
|
pango_layout_set_markup (render->layout, string, strlen (string));
|
|
pango_layout_get_pixel_extents (render->layout, &ink_rect, NULL);
|
|
g_free (string);
|
|
|
|
ret.height = ink_rect.height;
|
|
ret.baseline = PANGO_PIXELS (pango_layout_get_baseline (render->layout))
|
|
- ink_rect.y;
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Return the font size that you would need to pass to pango in order that the
|
|
* font applied to @element would be rendered at the text height applied to
|
|
* @element.
|
|
*/
|
|
static guint
|
|
gst_ttml_render_get_pango_font_size (GstTtmlRender * render,
|
|
const GstSubtitleElement * element)
|
|
{
|
|
guint desired_font_size =
|
|
(guint) ceil (element->style_set->font_size * render->height);
|
|
guint font_size = desired_font_size;
|
|
guint rendered_height = G_MAXUINT;
|
|
FontMetrics metrics;
|
|
|
|
while (rendered_height > desired_font_size) {
|
|
metrics =
|
|
gst_ttml_render_get_pango_font_metrics (render, element->style_set,
|
|
font_size);
|
|
rendered_height = metrics.height;
|
|
--font_size;
|
|
}
|
|
|
|
return font_size + 1;
|
|
}
|
|
|
|
|
|
/*
|
|
* Reunites each element in @block with its text, as extracted from @buf. Also
|
|
* stores the concatenated text from all contained elements to facilitate
|
|
* future processing.
|
|
*/
|
|
static UnifiedBlock *
|
|
gst_ttml_render_unify_block (GstTtmlRender * render,
|
|
const GstSubtitleBlock * block, GstBuffer * buf)
|
|
{
|
|
UnifiedBlock *ret = g_slice_new0 (UnifiedBlock);
|
|
guint i;
|
|
|
|
ret->unified_elements = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
gst_ttml_render_unified_element_free);
|
|
ret->style_set = gst_subtitle_style_set_ref (block->style_set);
|
|
ret->joined_text = g_strdup ("");
|
|
|
|
for (i = 0; i < gst_subtitle_block_get_element_count (block); ++i) {
|
|
gchar *text;
|
|
UnifiedElement *ue = g_slice_new0 (UnifiedElement);
|
|
ue->element =
|
|
gst_subtitle_element_ref (gst_subtitle_block_get_element (block, i));
|
|
ue->pango_font_size =
|
|
gst_ttml_render_get_pango_font_size (render, ue->element);
|
|
ue->pango_font_metrics =
|
|
gst_ttml_render_get_pango_font_metrics (render, ue->element->style_set,
|
|
ue->pango_font_size);
|
|
ue->text =
|
|
gst_ttml_render_get_text_from_buffer (buf, ue->element->text_index);
|
|
g_ptr_array_add (ret->unified_elements, ue);
|
|
|
|
text = g_strjoin (NULL, ret->joined_text, ue->text, NULL);
|
|
g_free (ret->joined_text);
|
|
ret->joined_text = text;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Returns index of nearest breakpoint before @index in @block's text. If no
|
|
* breakpoints are found, returns -1.
|
|
*/
|
|
static gint
|
|
gst_ttml_render_get_nearest_breakpoint (const UnifiedBlock * block, guint index)
|
|
{
|
|
const gchar *end = block->joined_text + index - 1;
|
|
|
|
while ((end = g_utf8_find_prev_char (block->joined_text, end))) {
|
|
gchar buf[6] = { 0 };
|
|
gunichar u = g_utf8_get_char (end);
|
|
gint nbytes = g_unichar_to_utf8 (u, buf);
|
|
|
|
if (nbytes == 1 && (buf[0] == 0x20 || buf[0] == 0x9 || buf[0] == 0xD))
|
|
return end - block->joined_text;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
/* Return the pango markup representation of all the elements in @block. */
|
|
static gchar *
|
|
gst_ttml_render_generate_block_markup (const UnifiedBlock * block)
|
|
{
|
|
gchar *joined_text, *old_text;
|
|
guint element_count = gst_ttml_render_unified_block_element_count (block);
|
|
guint i;
|
|
|
|
joined_text = g_strdup ("");
|
|
|
|
for (i = 0; i < element_count; ++i) {
|
|
UnifiedElement *ue = gst_ttml_render_unified_block_get_element (block, i);
|
|
gchar *element_markup =
|
|
gst_ttml_render_generate_pango_markup (ue->element->style_set,
|
|
ue->pango_font_size, ue->text);
|
|
|
|
old_text = joined_text;
|
|
joined_text = g_strconcat (joined_text, element_markup, NULL);
|
|
GST_CAT_DEBUG (ttmlrender_debug, "Joined text is now: %s", joined_text);
|
|
|
|
g_free (element_markup);
|
|
g_free (old_text);
|
|
}
|
|
|
|
return joined_text;
|
|
}
|
|
|
|
|
|
/*
|
|
* Returns a set of character ranges, which correspond to the ranges of
|
|
* characters from @block that should be rendered on each generated line area.
|
|
* Essentially, this function determines line breaking and wrapping.
|
|
*/
|
|
static GPtrArray *
|
|
gst_ttml_render_get_line_char_ranges (GstTtmlRender * render,
|
|
const UnifiedBlock * block, guint width, gboolean wrap)
|
|
{
|
|
gint start_index = 0;
|
|
GPtrArray *line_ranges = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
gst_ttml_render_char_range_free);
|
|
PangoRectangle ink_rect;
|
|
gchar *markup;
|
|
gint i;
|
|
|
|
/* Handle hard breaks in block text. */
|
|
while (start_index < strlen (block->joined_text)) {
|
|
CharRange *range = g_slice_new0 (CharRange);
|
|
gchar *c = block->joined_text + start_index;
|
|
while (*c != '\0' && *c != '\n')
|
|
++c;
|
|
range->first_index = start_index;
|
|
range->last_index = (c - block->joined_text) - 1;
|
|
g_ptr_array_add (line_ranges, range);
|
|
start_index = range->last_index + 2;
|
|
}
|
|
|
|
if (!wrap)
|
|
return line_ranges;
|
|
|
|
GST_CAT_LOG (ttmlrender_debug,
|
|
"After handling breaks, we have the following ranges:");
|
|
for (i = 0; i < line_ranges->len; ++i) {
|
|
CharRange *range = g_ptr_array_index (line_ranges, i);
|
|
GST_CAT_LOG (ttmlrender_debug, "ranges[%d] first:%u last:%u", i,
|
|
range->first_index, range->last_index);
|
|
}
|
|
|
|
markup = gst_ttml_render_generate_block_markup (block);
|
|
pango_layout_set_markup (render->layout, markup, strlen (markup));
|
|
pango_layout_set_width (render->layout, -1);
|
|
|
|
pango_layout_get_pixel_extents (render->layout, &ink_rect, NULL);
|
|
GST_CAT_LOG (ttmlrender_debug, "Layout extents - x:%d y:%d w:%d h:%d",
|
|
ink_rect.x, ink_rect.y, ink_rect.width, ink_rect.height);
|
|
|
|
/* For each range, wrap if it extends beyond allowed width. */
|
|
for (i = 0; i < line_ranges->len; ++i) {
|
|
CharRange *range, *new_range;
|
|
gint max_line_extent;
|
|
gint end_index = 0;
|
|
gint trailing;
|
|
PangoRectangle rect;
|
|
gboolean within_line;
|
|
|
|
do {
|
|
range = g_ptr_array_index (line_ranges, i);
|
|
GST_CAT_LOG (ttmlrender_debug,
|
|
"Seeing if we need to wrap range[%d] - start:%u end:%u", i,
|
|
range->first_index, range->last_index);
|
|
|
|
pango_layout_index_to_pos (render->layout, range->first_index, &rect);
|
|
GST_CAT_LOG (ttmlrender_debug, "First char at x:%d y:%d", rect.x,
|
|
rect.y);
|
|
|
|
max_line_extent = rect.x + (PANGO_SCALE * width);
|
|
GST_CAT_LOG (ttmlrender_debug, "max_line_extent: %d",
|
|
PANGO_PIXELS (max_line_extent));
|
|
|
|
within_line =
|
|
pango_layout_xy_to_index (render->layout, max_line_extent, rect.y,
|
|
&end_index, &trailing);
|
|
|
|
GST_CAT_LOG (ttmlrender_debug, "Index nearest to breakpoint: %d",
|
|
end_index);
|
|
|
|
if (within_line) {
|
|
end_index = gst_ttml_render_get_nearest_breakpoint (block, end_index);
|
|
|
|
if (end_index > range->first_index) {
|
|
new_range = g_slice_new0 (CharRange);
|
|
new_range->first_index = end_index + 1;
|
|
new_range->last_index = range->last_index;
|
|
GST_CAT_LOG (ttmlrender_debug,
|
|
"Wrapping line %d; added new range - start:%u end:%u", i,
|
|
new_range->first_index, new_range->last_index);
|
|
|
|
range->last_index = end_index;
|
|
GST_CAT_LOG (ttmlrender_debug,
|
|
"Modified last_index of existing range; range is now start:%u "
|
|
"end:%u", range->first_index, range->last_index);
|
|
|
|
g_ptr_array_insert (line_ranges, ++i, new_range);
|
|
} else {
|
|
GST_CAT_DEBUG (ttmlrender_debug,
|
|
"Couldn't find a suitable breakpoint");
|
|
within_line = FALSE;
|
|
}
|
|
}
|
|
} while (within_line);
|
|
}
|
|
|
|
g_free (markup);
|
|
return line_ranges;
|
|
}
|
|
|
|
|
|
/*
|
|
* Returns the index of the element in @block containing the character at index
|
|
* @char_index in @block's text. If @offset is not NULL, sets it to the
|
|
* character offset of @char_index within the element where it is found.
|
|
*/
|
|
static gint
|
|
gst_ttml_render_get_element_index (const UnifiedBlock * block,
|
|
const gint char_index, gint * offset)
|
|
{
|
|
gint count = 0;
|
|
gint i;
|
|
|
|
if ((char_index < 0) || (char_index >= strlen (block->joined_text)))
|
|
return -1;
|
|
|
|
for (i = 0; i < gst_ttml_render_unified_block_element_count (block); ++i) {
|
|
UnifiedElement *ue = gst_ttml_render_unified_block_get_element (block, i);
|
|
if ((char_index >= count) && (char_index < (count + strlen (ue->text)))) {
|
|
if (offset)
|
|
*offset = char_index - count;
|
|
break;
|
|
}
|
|
count += strlen (ue->text);
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
|
|
static guint
|
|
gst_ttml_render_strip_leading_spaces (gchar ** string)
|
|
{
|
|
gchar *c = *string;
|
|
|
|
while (c) {
|
|
gchar buf[6] = { 0 };
|
|
gunichar u = g_utf8_get_char (c);
|
|
gint nbytes = g_unichar_to_utf8 (u, buf);
|
|
|
|
if ((nbytes == 1) && (buf[0] == 0x20))
|
|
c = g_utf8_find_next_char (c, c + strlen (*string));
|
|
else
|
|
break;
|
|
}
|
|
|
|
if (!c) {
|
|
GST_CAT_DEBUG (ttmlrender_debug,
|
|
"All characters would be removed from string.");
|
|
return 0;
|
|
} else if (c > *string) {
|
|
gchar *tmp = *string;
|
|
*string = g_strdup (c);
|
|
GST_CAT_DEBUG (ttmlrender_debug, "Replacing text \"%s\" with \"%s\"", tmp,
|
|
*string);
|
|
g_free (tmp);
|
|
}
|
|
|
|
return strlen (*string);
|
|
}
|
|
|
|
|
|
static guint
|
|
gst_ttml_render_strip_trailing_spaces (gchar ** string)
|
|
{
|
|
gchar *c = *string + strlen (*string) - 1;
|
|
gint nbytes;
|
|
|
|
while (c) {
|
|
gchar buf[6] = { 0 };
|
|
gunichar u = g_utf8_get_char (c);
|
|
nbytes = g_unichar_to_utf8 (u, buf);
|
|
|
|
if ((nbytes == 1) && (buf[0] == 0x20))
|
|
c = g_utf8_find_prev_char (*string, c);
|
|
else
|
|
break;
|
|
}
|
|
|
|
if (!c) {
|
|
GST_CAT_DEBUG (ttmlrender_debug,
|
|
"All characters would be removed from string.");
|
|
return 0;
|
|
} else {
|
|
gchar *tmp = *string;
|
|
*string = g_strndup (*string, (c - *string) + nbytes);
|
|
GST_CAT_DEBUG (ttmlrender_debug, "Replacing text \"%s\" with \"%s\"", tmp,
|
|
*string);
|
|
g_free (tmp);
|
|
}
|
|
|
|
return strlen (*string);
|
|
}
|
|
|
|
|
|
/*
|
|
* Treating each block in @blocks as a separate line area, conditionally strips
|
|
* space characters from the beginning and end of each line. This function
|
|
* implements the suppress-at-line-break="auto" and
|
|
* white-space-treatment="ignore-if-surrounding-linefeed" behaviours (specified
|
|
* by TTML section 7.2.3) for elements at the start and end of lines that have
|
|
* xml:space="default" applied to them. If stripping whitespace from a block
|
|
* removes all elements of that block, the block will be removed from @blocks.
|
|
* Returns the number of remaining blocks.
|
|
*/
|
|
static guint
|
|
gst_ttml_render_handle_whitespace (GPtrArray * blocks)
|
|
{
|
|
gint i;
|
|
|
|
for (i = 0; i < blocks->len; ++i) {
|
|
UnifiedBlock *ub = g_ptr_array_index (blocks, i);
|
|
UnifiedElement *ue;
|
|
guint remaining_chars = 0;
|
|
|
|
/* Remove leading spaces from line area. */
|
|
while ((gst_ttml_render_unified_block_element_count (ub) > 0)
|
|
&& (remaining_chars == 0)) {
|
|
ue = gst_ttml_render_unified_block_get_element (ub, 0);
|
|
if (!ue->element->suppress_whitespace)
|
|
break;
|
|
remaining_chars = gst_ttml_render_strip_leading_spaces (&ue->text);
|
|
|
|
if (remaining_chars == 0) {
|
|
g_ptr_array_remove_index (ub->unified_elements, 0);
|
|
GST_CAT_DEBUG (ttmlrender_debug, "Removed first element from block");
|
|
}
|
|
}
|
|
|
|
remaining_chars = 0;
|
|
|
|
/* Remove trailing spaces from line area. */
|
|
while ((gst_ttml_render_unified_block_element_count (ub) > 0)
|
|
&& (remaining_chars == 0)) {
|
|
ue = gst_ttml_render_unified_block_get_element (ub,
|
|
gst_ttml_render_unified_block_element_count (ub) - 1);
|
|
if (!ue->element->suppress_whitespace)
|
|
break;
|
|
remaining_chars = gst_ttml_render_strip_trailing_spaces (&ue->text);
|
|
|
|
if (remaining_chars == 0) {
|
|
g_ptr_array_remove_index (ub->unified_elements,
|
|
gst_ttml_render_unified_block_element_count (ub) - 1);
|
|
GST_CAT_DEBUG (ttmlrender_debug, "Removed last element from block");
|
|
}
|
|
}
|
|
|
|
if (gst_ttml_render_unified_block_element_count (ub) == 0)
|
|
g_ptr_array_remove_index (blocks, i--);
|
|
}
|
|
|
|
return blocks->len;
|
|
}
|
|
|
|
|
|
/*
|
|
* Splits a single UnifiedBlock, @block, into an array of separate
|
|
* UnifiedBlocks, according to the character ranges given in @char_ranges.
|
|
* Each resulting UnifiedBlock will contain only the elements to which belong
|
|
* the characters in its corresponding character range; the text of the first
|
|
* and last element in the block will be clipped of any characters before and
|
|
* after, respectively, the first and last characters in the corresponding
|
|
* range.
|
|
*/
|
|
static GPtrArray *
|
|
gst_ttml_render_split_block (UnifiedBlock * block, GPtrArray * char_ranges)
|
|
{
|
|
GPtrArray *ret = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
gst_ttml_render_unified_block_free);
|
|
gint i;
|
|
|
|
for (i = 0; i < char_ranges->len; ++i) {
|
|
gint index;
|
|
gint first_offset = 0;
|
|
gint last_offset = 0;
|
|
CharRange *range = g_ptr_array_index (char_ranges, i);
|
|
UnifiedBlock *clone = gst_ttml_render_unified_block_copy (block);
|
|
UnifiedElement *ue;
|
|
gchar *tmp;
|
|
|
|
GST_CAT_LOG (ttmlrender_debug, "range start:%u end:%u", range->first_index,
|
|
range->last_index);
|
|
index =
|
|
gst_ttml_render_get_element_index (clone, range->last_index,
|
|
&last_offset);
|
|
GST_CAT_LOG (ttmlrender_debug, "Last char in range is in element %d",
|
|
index);
|
|
|
|
if (index < 0) {
|
|
GST_CAT_WARNING (ttmlrender_debug, "Range end not found in block text.");
|
|
gst_ttml_render_unified_block_free (clone);
|
|
continue;
|
|
}
|
|
|
|
/* Remove elements that are after the one that contains the range end. */
|
|
GST_CAT_LOG (ttmlrender_debug, "There are %d elements in cloned block.",
|
|
gst_ttml_render_unified_block_element_count (clone));
|
|
while (gst_ttml_render_unified_block_element_count (clone) > (index + 1)) {
|
|
GST_CAT_LOG (ttmlrender_debug, "Removing last element in cloned block.");
|
|
g_ptr_array_remove_index (clone->unified_elements, index + 1);
|
|
}
|
|
|
|
index =
|
|
gst_ttml_render_get_element_index (clone, range->first_index,
|
|
&first_offset);
|
|
GST_CAT_LOG (ttmlrender_debug, "First char in range is in element %d",
|
|
index);
|
|
|
|
if (index < 0) {
|
|
GST_CAT_WARNING (ttmlrender_debug,
|
|
"Range start not found in block text.");
|
|
gst_ttml_render_unified_block_free (clone);
|
|
continue;
|
|
}
|
|
|
|
/* Remove elements that are before the one that contains the range start. */
|
|
while (index > 0) {
|
|
GST_CAT_LOG (ttmlrender_debug, "Removing first element in cloned block");
|
|
g_ptr_array_remove_index (clone->unified_elements, 0);
|
|
--index;
|
|
}
|
|
|
|
/* Remove characters from first element that are before the range start. */
|
|
ue = gst_ttml_render_unified_block_get_element (clone, 0);
|
|
if (first_offset > 0) {
|
|
tmp = ue->text;
|
|
ue->text = g_strdup (ue->text + first_offset);
|
|
GST_CAT_DEBUG (ttmlrender_debug,
|
|
"First element text has been clipped to \"%s\"", ue->text);
|
|
g_free (tmp);
|
|
|
|
if (gst_ttml_render_unified_block_element_count (clone) == 1)
|
|
last_offset -= first_offset;
|
|
}
|
|
|
|
/* Remove characters from last element that are after the range end. */
|
|
ue = gst_ttml_render_unified_block_get_element (clone,
|
|
gst_ttml_render_unified_block_element_count (clone) - 1);
|
|
if (last_offset < (strlen (ue->text) - 1)) {
|
|
tmp = ue->text;
|
|
ue->text = g_strndup (ue->text, last_offset + 1);
|
|
GST_CAT_DEBUG (ttmlrender_debug,
|
|
"Last element text has been clipped to \"%s\"", ue->text);
|
|
g_free (tmp);
|
|
}
|
|
|
|
if (gst_ttml_render_unified_block_element_count (clone) > 0)
|
|
g_ptr_array_add (ret, clone);
|
|
else
|
|
gst_ttml_render_unified_block_free (clone);
|
|
}
|
|
|
|
if (ret->len == 0) {
|
|
GST_CAT_DEBUG (ttmlrender_debug, "No elements remain in clone.");
|
|
g_ptr_array_unref (ret);
|
|
ret = NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* Render the text in a pango-markup string. */
|
|
static GstTtmlRenderRenderedImage *
|
|
gst_ttml_render_draw_text (GstTtmlRender * render, const gchar * text,
|
|
guint line_height, guint baseline_offset)
|
|
{
|
|
GstTtmlRenderRenderedImage *ret;
|
|
cairo_surface_t *surface, *cropped_surface;
|
|
cairo_t *cairo_state, *cropped_state;
|
|
GstMapInfo map;
|
|
PangoRectangle logical_rect, ink_rect;
|
|
guint buf_width, buf_height;
|
|
gint stride;
|
|
gint bounding_box_x1, bounding_box_x2, bounding_box_y1, bounding_box_y2;
|
|
gint baseline;
|
|
|
|
ret = gst_ttml_render_rendered_image_new_empty ();
|
|
|
|
pango_layout_set_markup (render->layout, text, strlen (text));
|
|
GST_CAT_DEBUG (ttmlrender_debug, "Layout text: \"%s\"",
|
|
pango_layout_get_text (render->layout));
|
|
pango_layout_set_width (render->layout, -1);
|
|
|
|
pango_layout_get_pixel_extents (render->layout, &ink_rect, &logical_rect);
|
|
|
|
baseline = PANGO_PIXELS (pango_layout_get_baseline (render->layout));
|
|
|
|
bounding_box_x1 = MIN (logical_rect.x, ink_rect.x);
|
|
bounding_box_x2 = MAX (logical_rect.x + logical_rect.width,
|
|
ink_rect.x + ink_rect.width);
|
|
bounding_box_y1 = MIN (logical_rect.y, ink_rect.y);
|
|
bounding_box_y2 = MAX (logical_rect.y + logical_rect.height,
|
|
ink_rect.y + ink_rect.height);
|
|
|
|
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
|
|
(bounding_box_x2 - bounding_box_x1), (bounding_box_y2 - bounding_box_y1));
|
|
cairo_state = cairo_create (surface);
|
|
cairo_set_operator (cairo_state, CAIRO_OPERATOR_CLEAR);
|
|
cairo_paint (cairo_state);
|
|
cairo_set_operator (cairo_state, CAIRO_OPERATOR_OVER);
|
|
|
|
cairo_save (cairo_state);
|
|
pango_cairo_show_layout (cairo_state, render->layout);
|
|
cairo_restore (cairo_state);
|
|
|
|
buf_width = bounding_box_x2 - bounding_box_x1;
|
|
buf_height = ink_rect.height;
|
|
GST_CAT_DEBUG (ttmlrender_debug, "Output buffer width: %u height: %u",
|
|
buf_width, buf_height);
|
|
|
|
ret->image = gst_buffer_new_allocate (NULL, 4 * buf_width * buf_height, NULL);
|
|
gst_buffer_memset (ret->image, 0, 0U, 4 * buf_width * buf_height);
|
|
gst_buffer_map (ret->image, &map, GST_MAP_READWRITE);
|
|
|
|
stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, buf_width);
|
|
cropped_surface =
|
|
cairo_image_surface_create_for_data (map.data, CAIRO_FORMAT_ARGB32,
|
|
(bounding_box_x2 - bounding_box_x1), ink_rect.height, stride);
|
|
cropped_state = cairo_create (cropped_surface);
|
|
cairo_set_source_surface (cropped_state, surface, -bounding_box_x1,
|
|
-ink_rect.y);
|
|
cairo_rectangle (cropped_state, 0, 0, buf_width, buf_height);
|
|
cairo_fill (cropped_state);
|
|
|
|
cairo_destroy (cairo_state);
|
|
cairo_surface_destroy (surface);
|
|
cairo_destroy (cropped_state);
|
|
cairo_surface_destroy (cropped_surface);
|
|
gst_buffer_unmap (ret->image, &map);
|
|
|
|
ret->width = buf_width;
|
|
ret->height = buf_height;
|
|
ret->x = 0;
|
|
ret->y = MAX (0, (gint) baseline_offset - (baseline - ink_rect.y));
|
|
return ret;
|
|
}
|
|
|
|
|
|
static GstTtmlRenderRenderedImage *
|
|
gst_ttml_render_render_block_elements (GstTtmlRender * render,
|
|
UnifiedBlock * block, BlockMetrics block_metrics)
|
|
{
|
|
GPtrArray *inline_images = g_ptr_array_new_with_free_func (
|
|
(GDestroyNotify) gst_ttml_render_rendered_image_free);
|
|
GstTtmlRenderRenderedImage *ret = NULL;
|
|
guint line_padding =
|
|
(guint) ceil (block->style_set->line_padding * render->width);
|
|
gint i;
|
|
|
|
for (i = 0; i < gst_ttml_render_unified_block_element_count (block); ++i) {
|
|
UnifiedElement *ue = gst_ttml_render_unified_block_get_element (block, i);
|
|
gchar *markup;
|
|
GstTtmlRenderRenderedImage *text_image, *bg_image, *combined_image;
|
|
guint bg_offset, bg_width, bg_height;
|
|
GstBuffer *background;
|
|
|
|
markup = gst_ttml_render_generate_pango_markup (ue->element->style_set,
|
|
ue->pango_font_size, ue->text);
|
|
text_image = gst_ttml_render_draw_text (render, markup,
|
|
block_metrics.line_height, block_metrics.baseline_offset);
|
|
g_free (markup);
|
|
|
|
bg_offset = 0;
|
|
bg_height = block_metrics.line_height;
|
|
bg_width = text_image->width;
|
|
|
|
if (line_padding > 0) {
|
|
if (i == 0) {
|
|
text_image->x += line_padding;
|
|
bg_width += line_padding;
|
|
}
|
|
if (i == (gst_ttml_render_unified_block_element_count (block) - 1))
|
|
bg_width += line_padding;
|
|
}
|
|
|
|
background = gst_ttml_render_draw_rectangle (bg_width, bg_height,
|
|
ue->element->style_set->background_color);
|
|
bg_image = gst_ttml_render_rendered_image_new (background, 0,
|
|
bg_offset, bg_width, bg_height);
|
|
combined_image = gst_ttml_render_rendered_image_combine (bg_image,
|
|
text_image);
|
|
gst_ttml_render_rendered_image_free (bg_image);
|
|
gst_ttml_render_rendered_image_free (text_image);
|
|
g_ptr_array_add (inline_images, combined_image);
|
|
}
|
|
|
|
ret = gst_ttml_render_stitch_images (inline_images,
|
|
GST_TTML_DIRECTION_INLINE);
|
|
GST_CAT_DEBUG (ttmlrender_debug,
|
|
"Stitched line image - x:%d y:%d w:%u h:%u",
|
|
ret->x, ret->y, ret->width, ret->height);
|
|
g_ptr_array_unref (inline_images);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Align the images in @lines according to the multi_row_align and text_align
|
|
* settings in @style_set.
|
|
*/
|
|
static void
|
|
gst_ttml_render_align_line_areas (GPtrArray * lines,
|
|
const GstSubtitleStyleSet * style_set)
|
|
{
|
|
guint longest_line_width = 0;
|
|
gint i;
|
|
|
|
for (i = 0; i < lines->len; ++i) {
|
|
GstTtmlRenderRenderedImage *line = g_ptr_array_index (lines, i);
|
|
if (line->width > longest_line_width)
|
|
longest_line_width = line->width;
|
|
}
|
|
|
|
for (i = 0; i < lines->len; ++i) {
|
|
GstTtmlRenderRenderedImage *line = g_ptr_array_index (lines, i);
|
|
|
|
switch (style_set->multi_row_align) {
|
|
case GST_SUBTITLE_MULTI_ROW_ALIGN_CENTER:
|
|
line->x += (gint) round ((longest_line_width - line->width) / 2.0);
|
|
break;
|
|
case GST_SUBTITLE_MULTI_ROW_ALIGN_END:
|
|
line->x += (longest_line_width - line->width);
|
|
break;
|
|
case GST_SUBTITLE_MULTI_ROW_ALIGN_AUTO:
|
|
switch (style_set->text_align) {
|
|
case GST_SUBTITLE_TEXT_ALIGN_CENTER:
|
|
line->x += (gint) round ((longest_line_width - line->width) / 2.0);
|
|
break;
|
|
case GST_SUBTITLE_TEXT_ALIGN_END:
|
|
case GST_SUBTITLE_TEXT_ALIGN_RIGHT:
|
|
line->x += (longest_line_width - line->width);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Renders each UnifiedBlock in @blocks, and sets the positions of the
|
|
* resulting images according to the line height in @metrics and the alignment
|
|
* settings in @style_set.
|
|
*/
|
|
static GPtrArray *
|
|
gst_ttml_render_layout_blocks (GstTtmlRender * render, GPtrArray * blocks,
|
|
BlockMetrics metrics, const GstSubtitleStyleSet * style_set)
|
|
{
|
|
GPtrArray *ret = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
gst_ttml_render_rendered_image_free);
|
|
gint i;
|
|
|
|
for (i = 0; i < blocks->len; ++i) {
|
|
UnifiedBlock *block = g_ptr_array_index (blocks, i);
|
|
|
|
GstTtmlRenderRenderedImage *line =
|
|
gst_ttml_render_render_block_elements (render, block,
|
|
metrics);
|
|
line->y += (i * metrics.line_height);
|
|
g_ptr_array_add (ret, line);
|
|
}
|
|
|
|
gst_ttml_render_align_line_areas (ret, style_set);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* If any of an array of elements has line wrapping enabled, returns TRUE. */
|
|
static gboolean
|
|
gst_ttml_render_elements_are_wrapped (GPtrArray * elements)
|
|
{
|
|
GstSubtitleElement *element;
|
|
guint i;
|
|
|
|
for (i = 0; i < elements->len; ++i) {
|
|
element = g_ptr_array_index (elements, i);
|
|
if (element->style_set->wrap_option == GST_SUBTITLE_WRAPPING_ON)
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/*
|
|
* Return the descender (in pixels) shared by the greatest number of glyphs in
|
|
* @block.
|
|
*/
|
|
static guint
|
|
gst_ttml_render_get_most_frequent_descender (GstTtmlRender * render,
|
|
UnifiedBlock * block)
|
|
{
|
|
GHashTable *count_table = g_hash_table_new (g_direct_hash, g_direct_equal);
|
|
GHashTableIter iter;
|
|
gpointer key, value;
|
|
guint max_count = 0;
|
|
guint ret = 0;
|
|
gint i;
|
|
|
|
for (i = 0; i < gst_ttml_render_unified_block_element_count (block); ++i) {
|
|
UnifiedElement *ue = gst_ttml_render_unified_block_get_element (block, i);
|
|
guint descender =
|
|
ue->pango_font_metrics.height - ue->pango_font_metrics.baseline;
|
|
guint count;
|
|
|
|
if (g_hash_table_contains (count_table, GUINT_TO_POINTER (descender))) {
|
|
count = GPOINTER_TO_UINT (g_hash_table_lookup (count_table,
|
|
GUINT_TO_POINTER (descender)));
|
|
GST_CAT_LOG (ttmlrender_debug,
|
|
"Table already contains %u glyphs with descender %u; increasing "
|
|
"that count to %ld", count, descender,
|
|
count + g_utf8_strlen (ue->text, -1));
|
|
count += g_utf8_strlen (ue->text, -1);
|
|
} else {
|
|
count = g_utf8_strlen (ue->text, -1);
|
|
GST_CAT_LOG (ttmlrender_debug,
|
|
"No glyphs with descender %u; adding entry to table with count of %u",
|
|
descender, count);
|
|
}
|
|
|
|
g_hash_table_insert (count_table,
|
|
GUINT_TO_POINTER (descender), GUINT_TO_POINTER (count));
|
|
}
|
|
|
|
g_hash_table_iter_init (&iter, count_table);
|
|
while (g_hash_table_iter_next (&iter, &key, &value)) {
|
|
guint descender = GPOINTER_TO_UINT (key);
|
|
guint count = GPOINTER_TO_UINT (value);
|
|
|
|
if (count > max_count) {
|
|
max_count = count;
|
|
ret = descender;
|
|
}
|
|
}
|
|
|
|
g_hash_table_unref (count_table);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static BlockMetrics
|
|
gst_ttml_render_get_block_metrics (GstTtmlRender * render, UnifiedBlock * block)
|
|
{
|
|
BlockMetrics ret;
|
|
|
|
/*
|
|
* The specified behaviour in TTML when lineHeight is "normal" is different
|
|
* from the behaviour when a percentage is given. In the former case, the
|
|
* line height is a percentage (the TTML spec recommends 125%) of the largest
|
|
* font size that is applied to the spans within the block; in the latter
|
|
* case, the line height is the given percentage of the font size that is
|
|
* applied to the block itself.
|
|
*/
|
|
if (block->style_set->line_height < 0) { /* lineHeight="normal" case */
|
|
guint max_text_height = 0;
|
|
guint descender = 0;
|
|
guint i;
|
|
|
|
for (i = 0; i < gst_ttml_render_unified_block_element_count (block); ++i) {
|
|
UnifiedElement *ue = gst_ttml_render_unified_block_get_element (block, i);
|
|
|
|
if (ue->pango_font_metrics.height > max_text_height) {
|
|
max_text_height = ue->pango_font_metrics.height;
|
|
descender =
|
|
ue->pango_font_metrics.height - ue->pango_font_metrics.baseline;
|
|
}
|
|
}
|
|
|
|
GST_CAT_LOG (ttmlrender_debug, "Max descender: %u Max text height: %u",
|
|
descender, max_text_height);
|
|
ret.line_height = (guint) ceil (max_text_height * 1.25);
|
|
ret.baseline_offset = (guint) ((max_text_height + ret.line_height) / 2.0)
|
|
- descender;
|
|
} else {
|
|
guint descender;
|
|
guint font_size;
|
|
|
|
descender = gst_ttml_render_get_most_frequent_descender (render, block);
|
|
GST_CAT_LOG (ttmlrender_debug,
|
|
"Got most frequent descender value of %u pixels.", descender);
|
|
font_size = (guint) ceil (block->style_set->font_size * render->height);
|
|
ret.line_height = (guint) ceil (font_size * block->style_set->line_height);
|
|
ret.baseline_offset = (guint) ((font_size + ret.line_height) / 2.0)
|
|
- descender;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static GstTtmlRenderRenderedImage *
|
|
gst_ttml_render_rendered_image_new (GstBuffer * image, gint x, gint y,
|
|
guint width, guint height)
|
|
{
|
|
GstTtmlRenderRenderedImage *ret;
|
|
|
|
ret = g_slice_new0 (GstTtmlRenderRenderedImage);
|
|
|
|
ret->image = image;
|
|
ret->x = x;
|
|
ret->y = y;
|
|
ret->width = width;
|
|
ret->height = height;
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static GstTtmlRenderRenderedImage *
|
|
gst_ttml_render_rendered_image_new_empty (void)
|
|
{
|
|
return gst_ttml_render_rendered_image_new (NULL, 0, 0, 0, 0);
|
|
}
|
|
|
|
|
|
static inline GstTtmlRenderRenderedImage *
|
|
gst_ttml_render_rendered_image_copy (GstTtmlRenderRenderedImage * image)
|
|
{
|
|
GstTtmlRenderRenderedImage *ret = g_slice_new0 (GstTtmlRenderRenderedImage);
|
|
|
|
ret->image = gst_buffer_ref (image->image);
|
|
ret->x = image->x;
|
|
ret->y = image->y;
|
|
ret->width = image->width;
|
|
ret->height = image->height;
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static void
|
|
gst_ttml_render_rendered_image_free (GstTtmlRenderRenderedImage * image)
|
|
{
|
|
if (!image)
|
|
return;
|
|
gst_buffer_unref (image->image);
|
|
g_slice_free (GstTtmlRenderRenderedImage, image);
|
|
}
|
|
|
|
|
|
/*
|
|
* Combines two rendered image into a single image. The order of arguments is
|
|
* significant: @image2 will be rendered on top of @image1.
|
|
*/
|
|
static GstTtmlRenderRenderedImage *
|
|
gst_ttml_render_rendered_image_combine (GstTtmlRenderRenderedImage * image1,
|
|
GstTtmlRenderRenderedImage * image2)
|
|
{
|
|
GstTtmlRenderRenderedImage *ret;
|
|
GstMapInfo map1, map2, map_dest;
|
|
cairo_surface_t *sfc1, *sfc2, *sfc_dest;
|
|
cairo_t *state_dest;
|
|
|
|
if (!image1 && !image2)
|
|
return NULL;
|
|
if (image1 && !image2)
|
|
return gst_ttml_render_rendered_image_copy (image1);
|
|
if (image2 && !image1)
|
|
return gst_ttml_render_rendered_image_copy (image2);
|
|
|
|
ret = g_slice_new0 (GstTtmlRenderRenderedImage);
|
|
|
|
/* Work out dimensions of combined image. */
|
|
ret->x = MIN (image1->x, image2->x);
|
|
ret->y = MIN (image1->y, image2->y);
|
|
ret->width = MAX (image1->x + image1->width, image2->x + image2->width)
|
|
- ret->x;
|
|
ret->height = MAX (image1->y + image1->height, image2->y + image2->height)
|
|
- ret->y;
|
|
|
|
GST_CAT_LOG (ttmlrender_debug, "Dimensions of combined image: x:%u y:%u "
|
|
"width:%u height:%u", ret->x, ret->y, ret->width, ret->height);
|
|
|
|
/* Create cairo_surface from src images. */
|
|
gst_buffer_map (image1->image, &map1, GST_MAP_READ);
|
|
sfc1 =
|
|
cairo_image_surface_create_for_data (map1.data, CAIRO_FORMAT_ARGB32,
|
|
image1->width, image1->height,
|
|
cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, image1->width));
|
|
|
|
gst_buffer_map (image2->image, &map2, GST_MAP_READ);
|
|
sfc2 =
|
|
cairo_image_surface_create_for_data (map2.data, CAIRO_FORMAT_ARGB32,
|
|
image2->width, image2->height,
|
|
cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, image2->width));
|
|
|
|
/* Create cairo_surface for resultant image. */
|
|
ret->image = gst_buffer_new_allocate (NULL, 4 * ret->width * ret->height,
|
|
NULL);
|
|
gst_buffer_memset (ret->image, 0, 0U, 4 * ret->width * ret->height);
|
|
gst_buffer_map (ret->image, &map_dest, GST_MAP_READWRITE);
|
|
sfc_dest =
|
|
cairo_image_surface_create_for_data (map_dest.data, CAIRO_FORMAT_ARGB32,
|
|
ret->width, ret->height,
|
|
cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, ret->width));
|
|
state_dest = cairo_create (sfc_dest);
|
|
|
|
/* Blend image1 into destination surface. */
|
|
cairo_set_source_surface (state_dest, sfc1, image1->x - ret->x,
|
|
image1->y - ret->y);
|
|
cairo_rectangle (state_dest, image1->x - ret->x, image1->y - ret->y,
|
|
image1->width, image1->height);
|
|
cairo_fill (state_dest);
|
|
|
|
/* Blend image2 into destination surface. */
|
|
cairo_set_source_surface (state_dest, sfc2, image2->x - ret->x,
|
|
image2->y - ret->y);
|
|
cairo_rectangle (state_dest, image2->x - ret->x, image2->y - ret->y,
|
|
image2->width, image2->height);
|
|
cairo_fill (state_dest);
|
|
|
|
/* Return destination image. */
|
|
cairo_destroy (state_dest);
|
|
cairo_surface_destroy (sfc1);
|
|
cairo_surface_destroy (sfc2);
|
|
cairo_surface_destroy (sfc_dest);
|
|
gst_buffer_unmap (image1->image, &map1);
|
|
gst_buffer_unmap (image2->image, &map2);
|
|
gst_buffer_unmap (ret->image, &map_dest);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static GstTtmlRenderRenderedImage *
|
|
gst_ttml_render_rendered_image_crop (GstTtmlRenderRenderedImage * image,
|
|
gint x, gint y, guint width, guint height)
|
|
{
|
|
GstTtmlRenderRenderedImage *ret;
|
|
GstMapInfo map_src, map_dest;
|
|
cairo_surface_t *sfc_src, *sfc_dest;
|
|
cairo_t *state_dest;
|
|
|
|
if ((x <= image->x) && (y <= image->y) && (width >= image->width)
|
|
&& (height >= image->height))
|
|
return gst_ttml_render_rendered_image_copy (image);
|
|
|
|
if (image->x >= (x + (gint) width)
|
|
|| (image->x + (gint) image->width) <= x
|
|
|| image->y >= (y + (gint) height)
|
|
|| (image->y + (gint) image->height) <= y) {
|
|
GST_CAT_WARNING (ttmlrender_debug,
|
|
"Crop rectangle doesn't intersect image.");
|
|
return NULL;
|
|
}
|
|
|
|
ret = g_slice_new0 (GstTtmlRenderRenderedImage);
|
|
|
|
ret->x = MAX (image->x, x);
|
|
ret->y = MAX (image->y, y);
|
|
ret->width = MIN ((image->x + image->width) - ret->x, (x + width) - ret->x);
|
|
ret->height = MIN ((image->y + image->height) - ret->y,
|
|
(y + height) - ret->y);
|
|
|
|
GST_CAT_LOG (ttmlrender_debug, "Dimensions of cropped image: x:%u y:%u "
|
|
"width:%u height:%u", ret->x, ret->y, ret->width, ret->height);
|
|
|
|
/* Create cairo_surface from src image. */
|
|
gst_buffer_map (image->image, &map_src, GST_MAP_READ);
|
|
sfc_src =
|
|
cairo_image_surface_create_for_data (map_src.data, CAIRO_FORMAT_ARGB32,
|
|
image->width, image->height,
|
|
cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, image->width));
|
|
|
|
/* Create cairo_surface for cropped image. */
|
|
ret->image = gst_buffer_new_allocate (NULL, 4 * ret->width * ret->height,
|
|
NULL);
|
|
gst_buffer_memset (ret->image, 0, 0U, 4 * ret->width * ret->height);
|
|
gst_buffer_map (ret->image, &map_dest, GST_MAP_READWRITE);
|
|
sfc_dest =
|
|
cairo_image_surface_create_for_data (map_dest.data, CAIRO_FORMAT_ARGB32,
|
|
ret->width, ret->height,
|
|
cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, ret->width));
|
|
state_dest = cairo_create (sfc_dest);
|
|
|
|
/* Copy section of image1 into destination surface. */
|
|
cairo_set_source_surface (state_dest, sfc_src, (image->x - ret->x),
|
|
(image->y - ret->y));
|
|
cairo_rectangle (state_dest, 0, 0, ret->width, ret->height);
|
|
cairo_fill (state_dest);
|
|
|
|
cairo_destroy (state_dest);
|
|
cairo_surface_destroy (sfc_src);
|
|
cairo_surface_destroy (sfc_dest);
|
|
gst_buffer_unmap (image->image, &map_src);
|
|
gst_buffer_unmap (ret->image, &map_dest);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
gst_ttml_render_color_is_transparent (GstSubtitleColor * color)
|
|
{
|
|
return (color->a == 0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Overlays a set of rendered images to return a single image. Order is
|
|
* significant: later entries in @images are rendered on top of earlier
|
|
* entries.
|
|
*/
|
|
static GstTtmlRenderRenderedImage *
|
|
gst_ttml_render_overlay_images (GPtrArray * images)
|
|
{
|
|
GstTtmlRenderRenderedImage *ret = NULL;
|
|
gint i;
|
|
|
|
for (i = 0; i < images->len; ++i) {
|
|
GstTtmlRenderRenderedImage *tmp = ret;
|
|
ret = gst_ttml_render_rendered_image_combine (ret,
|
|
g_ptr_array_index (images, i));
|
|
gst_ttml_render_rendered_image_free (tmp);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Takes a set of images and renders them as a single image, where all the
|
|
* images are arranged contiguously in the direction given by @direction. Note
|
|
* that the positions of the images in @images will be altered.
|
|
*/
|
|
static GstTtmlRenderRenderedImage *
|
|
gst_ttml_render_stitch_images (GPtrArray * images, GstTtmlDirection direction)
|
|
{
|
|
guint cur_offset = 0;
|
|
GstTtmlRenderRenderedImage *ret = NULL;
|
|
gint i;
|
|
|
|
for (i = 0; i < images->len; ++i) {
|
|
GstTtmlRenderRenderedImage *block;
|
|
block = g_ptr_array_index (images, i);
|
|
|
|
if (direction == GST_TTML_DIRECTION_BLOCK) {
|
|
block->y += cur_offset;
|
|
cur_offset = block->y + block->height;
|
|
} else {
|
|
block->x += cur_offset;
|
|
cur_offset = block->x + block->width;
|
|
}
|
|
}
|
|
|
|
ret = gst_ttml_render_overlay_images (images);
|
|
|
|
if (ret) {
|
|
if (direction == GST_TTML_DIRECTION_BLOCK)
|
|
GST_CAT_LOG (ttmlrender_debug, "Height of stitched image: %u",
|
|
ret->height);
|
|
else
|
|
GST_CAT_LOG (ttmlrender_debug, "Width of stitched image: %u", ret->width);
|
|
ret->image = gst_buffer_make_writable (ret->image);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
static GstTtmlRenderRenderedImage *
|
|
gst_ttml_render_render_text_block (GstTtmlRender * render,
|
|
const GstSubtitleBlock * block, GstBuffer * text_buf, guint width,
|
|
gboolean overflow)
|
|
{
|
|
UnifiedBlock *unified_block;
|
|
BlockMetrics metrics;
|
|
gboolean wrap;
|
|
guint line_padding;
|
|
GPtrArray *ranges;
|
|
GPtrArray *split_blocks;
|
|
GPtrArray *images;
|
|
GstTtmlRenderRenderedImage *rendered_block = NULL;
|
|
gint i;
|
|
|
|
unified_block = gst_ttml_render_unify_block (render, block, text_buf);
|
|
metrics = gst_ttml_render_get_block_metrics (render, unified_block);
|
|
wrap = gst_ttml_render_elements_are_wrapped (block->elements);
|
|
|
|
line_padding = (guint) ceil (block->style_set->line_padding * render->width);
|
|
ranges = gst_ttml_render_get_line_char_ranges (render, unified_block, width -
|
|
(2 * line_padding), wrap);
|
|
|
|
for (i = 0; i < ranges->len; ++i) {
|
|
CharRange *range = g_ptr_array_index (ranges, i);
|
|
GST_CAT_LOG (ttmlrender_debug, "ranges[%d] first:%u last:%u", i,
|
|
range->first_index, range->last_index);
|
|
}
|
|
|
|
split_blocks = gst_ttml_render_split_block (unified_block, ranges);
|
|
if (split_blocks) {
|
|
guint blocks_remining = gst_ttml_render_handle_whitespace (split_blocks);
|
|
GST_CAT_DEBUG (ttmlrender_debug,
|
|
"There are %u blocks remaining after whitespace handling.",
|
|
blocks_remining);
|
|
|
|
if (blocks_remining > 0) {
|
|
images = gst_ttml_render_layout_blocks (render, split_blocks, metrics,
|
|
unified_block->style_set);
|
|
rendered_block = gst_ttml_render_overlay_images (images);
|
|
g_ptr_array_unref (images);
|
|
}
|
|
g_ptr_array_unref (split_blocks);
|
|
}
|
|
|
|
g_ptr_array_unref (ranges);
|
|
gst_ttml_render_unified_block_free (unified_block);
|
|
return rendered_block;
|
|
}
|
|
|
|
|
|
static GstVideoOverlayComposition *
|
|
gst_ttml_render_compose_overlay (GstTtmlRenderRenderedImage * image)
|
|
{
|
|
GstVideoOverlayRectangle *rectangle;
|
|
GstVideoOverlayComposition *ret = NULL;
|
|
|
|
gst_buffer_add_video_meta (image->image, GST_VIDEO_FRAME_FLAG_NONE,
|
|
GST_VIDEO_OVERLAY_COMPOSITION_FORMAT_RGB, image->width, image->height);
|
|
|
|
rectangle = gst_video_overlay_rectangle_new_raw (image->image, image->x,
|
|
image->y, image->width, image->height,
|
|
GST_VIDEO_OVERLAY_FORMAT_FLAG_PREMULTIPLIED_ALPHA);
|
|
|
|
ret = gst_video_overlay_composition_new (rectangle);
|
|
gst_video_overlay_rectangle_unref (rectangle);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static GstVideoOverlayComposition *
|
|
gst_ttml_render_render_text_region (GstTtmlRender * render,
|
|
GstSubtitleRegion * region, GstBuffer * text_buf)
|
|
{
|
|
guint region_x, region_y, region_width, region_height;
|
|
guint window_x, window_y, window_width, window_height;
|
|
guint padding_start, padding_end, padding_before, padding_after;
|
|
GPtrArray *rendered_blocks =
|
|
g_ptr_array_new_with_free_func (
|
|
(GDestroyNotify) gst_ttml_render_rendered_image_free);
|
|
GstTtmlRenderRenderedImage *region_image = NULL;
|
|
GstVideoOverlayComposition *ret = NULL;
|
|
guint i;
|
|
|
|
region_width = (guint) (round (region->style_set->extent_w * render->width));
|
|
region_height =
|
|
(guint) (round (region->style_set->extent_h * render->height));
|
|
region_x = (guint) (round (region->style_set->origin_x * render->width));
|
|
region_y = (guint) (round (region->style_set->origin_y * render->height));
|
|
|
|
padding_start =
|
|
(guint) (round (region->style_set->padding_start * render->width));
|
|
padding_end =
|
|
(guint) (round (region->style_set->padding_end * render->width));
|
|
padding_before =
|
|
(guint) (round (region->style_set->padding_before * render->height));
|
|
padding_after =
|
|
(guint) (round (region->style_set->padding_after * render->height));
|
|
|
|
/* "window" here refers to the section of the region that we're allowed to
|
|
* render into, i.e., the region minus padding. */
|
|
window_x = region_x + padding_start;
|
|
window_y = region_y + padding_before;
|
|
window_width = region_width - (padding_start + padding_end);
|
|
window_height = region_height - (padding_before + padding_after);
|
|
|
|
GST_CAT_DEBUG (ttmlrender_debug,
|
|
"Padding: start: %u end: %u before: %u after: %u",
|
|
padding_start, padding_end, padding_before, padding_after);
|
|
|
|
/* Render region background, if non-transparent. */
|
|
if (!gst_ttml_render_color_is_transparent (®ion->style_set->
|
|
background_color)) {
|
|
GstBuffer *bg_rect;
|
|
|
|
bg_rect = gst_ttml_render_draw_rectangle (region_width, region_height,
|
|
region->style_set->background_color);
|
|
region_image = gst_ttml_render_rendered_image_new (bg_rect, region_x,
|
|
region_y, region_width, region_height);
|
|
}
|
|
|
|
/* Render each block and append to list. */
|
|
for (i = 0; i < gst_subtitle_region_get_block_count (region); ++i) {
|
|
const GstSubtitleBlock *block;
|
|
GstTtmlRenderRenderedImage *rendered_block;
|
|
|
|
block = gst_subtitle_region_get_block (region, i);
|
|
rendered_block = gst_ttml_render_render_text_block (render, block, text_buf,
|
|
window_width, TRUE);
|
|
|
|
if (!rendered_block)
|
|
continue;
|
|
|
|
GST_CAT_LOG (ttmlrender_debug, "rendered_block - x:%d y:%d w:%u h:%u",
|
|
rendered_block->x, rendered_block->y, rendered_block->width,
|
|
rendered_block->height);
|
|
|
|
switch (block->style_set->text_align) {
|
|
case GST_SUBTITLE_TEXT_ALIGN_CENTER:
|
|
rendered_block->x
|
|
+= (gint) round ((window_width - rendered_block->width) / 2.0);
|
|
break;
|
|
|
|
case GST_SUBTITLE_TEXT_ALIGN_RIGHT:
|
|
case GST_SUBTITLE_TEXT_ALIGN_END:
|
|
rendered_block->x += (window_width - rendered_block->width);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!gst_ttml_render_color_is_transparent (&block->style_set->
|
|
background_color)) {
|
|
/* Draw block background rectangle and render block image over it */
|
|
GstTtmlRenderRenderedImage *tmp = rendered_block;
|
|
GstBuffer *block_bg_buf;
|
|
GstTtmlRenderRenderedImage *block_bg_image;
|
|
|
|
block_bg_buf = gst_ttml_render_draw_rectangle (window_width,
|
|
rendered_block->height, block->style_set->background_color);
|
|
block_bg_image = gst_ttml_render_rendered_image_new (block_bg_buf, 0,
|
|
rendered_block->y, window_width, rendered_block->height);
|
|
rendered_block = gst_ttml_render_rendered_image_combine (block_bg_image,
|
|
rendered_block);
|
|
gst_ttml_render_rendered_image_free (tmp);
|
|
gst_ttml_render_rendered_image_free (block_bg_image);
|
|
}
|
|
|
|
rendered_block->y = 0;
|
|
g_ptr_array_add (rendered_blocks, rendered_block);
|
|
}
|
|
|
|
if (rendered_blocks->len > 0) {
|
|
GstTtmlRenderRenderedImage *blocks_image, *tmp;
|
|
|
|
blocks_image = gst_ttml_render_stitch_images (rendered_blocks,
|
|
GST_TTML_DIRECTION_BLOCK);
|
|
blocks_image->x += window_x;
|
|
|
|
switch (region->style_set->display_align) {
|
|
case GST_SUBTITLE_DISPLAY_ALIGN_BEFORE:
|
|
blocks_image->y = window_y;
|
|
break;
|
|
case GST_SUBTITLE_DISPLAY_ALIGN_CENTER:
|
|
blocks_image->y = region_y + ((gint) ((region_height + padding_before)
|
|
- (padding_after + blocks_image->height))) / 2;
|
|
break;
|
|
case GST_SUBTITLE_DISPLAY_ALIGN_AFTER:
|
|
blocks_image->y = (region_y + region_height)
|
|
- (padding_after + blocks_image->height);
|
|
break;
|
|
}
|
|
|
|
if ((region->style_set->overflow == GST_SUBTITLE_OVERFLOW_MODE_HIDDEN)
|
|
&& ((blocks_image->height > window_height)
|
|
|| (blocks_image->width > window_width))) {
|
|
GstTtmlRenderRenderedImage *tmp = blocks_image;
|
|
blocks_image = gst_ttml_render_rendered_image_crop (blocks_image,
|
|
window_x, window_y, window_width, window_height);
|
|
gst_ttml_render_rendered_image_free (tmp);
|
|
}
|
|
|
|
tmp = region_image;
|
|
region_image =
|
|
gst_ttml_render_rendered_image_combine (region_image, blocks_image);
|
|
gst_ttml_render_rendered_image_free (tmp);
|
|
gst_ttml_render_rendered_image_free (blocks_image);
|
|
}
|
|
|
|
if (region_image) {
|
|
ret = gst_ttml_render_compose_overlay (region_image);
|
|
gst_ttml_render_rendered_image_free (region_image);
|
|
}
|
|
|
|
g_ptr_array_unref (rendered_blocks);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static GstFlowReturn
|
|
gst_ttml_render_video_chain (GstPad * pad, GstObject * parent,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstTtmlRender *render;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
gboolean in_seg = FALSE;
|
|
guint64 start, stop, clip_start = 0, clip_stop = 0;
|
|
gchar *text = NULL;
|
|
|
|
render = GST_TTML_RENDER (parent);
|
|
|
|
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 (render, "%" GST_SEGMENT_FORMAT " BUFFER: ts=%"
|
|
GST_TIME_FORMAT ", end=%" GST_TIME_FORMAT, &render->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 < render->segment.start)
|
|
goto out_of_segment;
|
|
|
|
in_seg = gst_segment_clip (&render->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 (render, "clipping buffer timestamp/duration to segment");
|
|
buffer = gst_buffer_make_writable (buffer);
|
|
GST_BUFFER_TIMESTAMP (buffer) = clip_start;
|
|
if (stop != -1)
|
|
GST_BUFFER_DURATION (buffer) = clip_stop - clip_start;
|
|
}
|
|
|
|
/* now, after we've done the clipping, fix up end time if there's no
|
|
* duration (we only use those estimated values internally though, we
|
|
* don't want to set bogus values on the buffer itself) */
|
|
if (stop == -1) {
|
|
if (render->info.fps_n && render->info.fps_d) {
|
|
GST_DEBUG_OBJECT (render, "estimating duration based on framerate");
|
|
stop = start + gst_util_uint64_scale_int (GST_SECOND,
|
|
render->info.fps_d, render->info.fps_n);
|
|
} else {
|
|
GST_LOG_OBJECT (render, "no duration, assuming minimal duration");
|
|
stop = start + 1; /* we need to assume some interval */
|
|
}
|
|
}
|
|
|
|
gst_object_sync_values (GST_OBJECT (render), GST_BUFFER_TIMESTAMP (buffer));
|
|
|
|
wait_for_text_buf:
|
|
|
|
GST_TTML_RENDER_LOCK (render);
|
|
|
|
if (render->video_flushing)
|
|
goto flushing;
|
|
|
|
if (render->video_eos)
|
|
goto have_eos;
|
|
|
|
/* Text pad not linked; push input video frame */
|
|
if (!render->text_linked) {
|
|
GST_LOG_OBJECT (render, "Text pad not linked");
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
ret = gst_pad_push (render->srcpad, buffer);
|
|
goto not_linked;
|
|
}
|
|
|
|
/* Text pad linked, check if we have a text buffer queued */
|
|
if (render->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 (render->text_buffer) ||
|
|
!GST_BUFFER_DURATION_IS_VALID (render->text_buffer)) {
|
|
GST_WARNING_OBJECT (render,
|
|
"Got text buffer with invalid timestamp or duration");
|
|
pop_text = TRUE;
|
|
valid_text_time = FALSE;
|
|
} else {
|
|
text_start = GST_BUFFER_TIMESTAMP (render->text_buffer);
|
|
text_end = text_start + GST_BUFFER_DURATION (render->text_buffer);
|
|
}
|
|
|
|
vid_running_time =
|
|
gst_segment_to_running_time (&render->segment, GST_FORMAT_TIME, start);
|
|
vid_running_time_end =
|
|
gst_segment_to_running_time (&render->segment, GST_FORMAT_TIME, stop);
|
|
|
|
/* If timestamp and duration are valid */
|
|
if (valid_text_time) {
|
|
text_running_time =
|
|
gst_segment_to_running_time (&render->text_segment,
|
|
GST_FORMAT_TIME, text_start);
|
|
text_running_time_end =
|
|
gst_segment_to_running_time (&render->text_segment,
|
|
GST_FORMAT_TIME, text_end);
|
|
}
|
|
|
|
GST_LOG_OBJECT (render, "T: %" GST_TIME_FORMAT " - %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (text_running_time),
|
|
GST_TIME_ARGS (text_running_time_end));
|
|
GST_LOG_OBJECT (render, "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 (render, "text buffer too old, popping");
|
|
pop_text = FALSE;
|
|
gst_ttml_render_pop_text (render);
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
goto wait_for_text_buf;
|
|
} else if (valid_text_time && vid_running_time_end <= text_running_time) {
|
|
GST_LOG_OBJECT (render, "text in future, pushing video buf");
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
/* Push the video frame */
|
|
ret = gst_pad_push (render->srcpad, buffer);
|
|
} else {
|
|
if (render->need_render) {
|
|
GstSubtitleRegion *region = NULL;
|
|
GstSubtitleMeta *subtitle_meta = NULL;
|
|
guint i;
|
|
|
|
if (render->compositions) {
|
|
g_list_free_full (render->compositions,
|
|
(GDestroyNotify) gst_video_overlay_composition_unref);
|
|
render->compositions = NULL;
|
|
}
|
|
|
|
subtitle_meta = gst_buffer_get_subtitle_meta (render->text_buffer);
|
|
if (!subtitle_meta) {
|
|
GST_CAT_WARNING (ttmlrender_debug, "Failed to get subtitle meta.");
|
|
} else {
|
|
for (i = 0; i < subtitle_meta->regions->len; ++i) {
|
|
GstVideoOverlayComposition *composition;
|
|
region = g_ptr_array_index (subtitle_meta->regions, i);
|
|
composition = gst_ttml_render_render_text_region (render, region,
|
|
render->text_buffer);
|
|
if (composition) {
|
|
render->compositions = g_list_append (render->compositions,
|
|
composition);
|
|
}
|
|
}
|
|
}
|
|
render->need_render = FALSE;
|
|
}
|
|
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
ret = gst_ttml_render_push_frame (render, buffer);
|
|
|
|
if (valid_text_time && text_running_time_end <= vid_running_time_end) {
|
|
GST_LOG_OBJECT (render, "text buffer not needed any longer");
|
|
pop_text = TRUE;
|
|
}
|
|
}
|
|
if (pop_text) {
|
|
GST_TTML_RENDER_LOCK (render);
|
|
gst_ttml_render_pop_text (render);
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
}
|
|
} else {
|
|
gboolean wait_for_text_buf = TRUE;
|
|
|
|
if (render->text_eos)
|
|
wait_for_text_buf = FALSE;
|
|
|
|
if (!render->wait_text)
|
|
wait_for_text_buf = FALSE;
|
|
|
|
/* Text pad linked, but no text buffer available - what now? */
|
|
if (render->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 (&render->segment, GST_FORMAT_TIME,
|
|
GST_BUFFER_TIMESTAMP (buffer));
|
|
text_start_running_time =
|
|
gst_segment_to_running_time (&render->text_segment,
|
|
GST_FORMAT_TIME, render->text_segment.start);
|
|
text_position_running_time =
|
|
gst_segment_to_running_time (&render->text_segment,
|
|
GST_FORMAT_TIME, render->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 (render, "no text buffer, need to wait for one");
|
|
GST_TTML_RENDER_WAIT (render);
|
|
GST_DEBUG_OBJECT (render, "resuming");
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
goto wait_for_text_buf;
|
|
} else {
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
GST_LOG_OBJECT (render, "no need to wait for a text buffer");
|
|
ret = gst_pad_push (render->srcpad, buffer);
|
|
}
|
|
}
|
|
|
|
not_linked:
|
|
g_free (text);
|
|
|
|
/* Update position */
|
|
render->segment.position = clip_start;
|
|
|
|
return ret;
|
|
|
|
missing_timestamp:
|
|
{
|
|
GST_WARNING_OBJECT (render, "buffer without timestamp, discarding");
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
flushing:
|
|
{
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
GST_DEBUG_OBJECT (render, "flushing, discarding buffer");
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_FLUSHING;
|
|
}
|
|
have_eos:
|
|
{
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
GST_DEBUG_OBJECT (render, "eos, discarding buffer");
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_EOS;
|
|
}
|
|
out_of_segment:
|
|
{
|
|
GST_DEBUG_OBJECT (render, "buffer out of segment, discarding");
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_ttml_render_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
|
|
GstTtmlRender *render = GST_TTML_RENDER (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
GST_TTML_RENDER_LOCK (render);
|
|
render->text_flushing = TRUE;
|
|
render->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_ttml_render_pop_text (render);
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
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_TTML_RENDER_LOCK (render);
|
|
render->text_flushing = FALSE;
|
|
render->video_flushing = FALSE;
|
|
render->video_eos = FALSE;
|
|
render->text_eos = FALSE;
|
|
gst_segment_init (&render->segment, GST_FORMAT_TIME);
|
|
gst_segment_init (&render->text_segment, GST_FORMAT_TIME);
|
|
GST_TTML_RENDER_UNLOCK (render);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|