mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-09 05:38:58 +00:00
Also improve debugging a bit and drop buffers without valid timestamp or duration because we can't handle them.
871 lines
26 KiB
C
871 lines
26 KiB
C
/*
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* Copyright (c) 2008 Benjamin Schmitz <vortex@wolpzone.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "gstassrender.h"
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#include <gst/video/video.h>
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GST_DEBUG_CATEGORY_STATIC (gst_assrender_debug);
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#define GST_CAT_DEFAULT gst_assrender_debug
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/* Filter signals and props */
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enum
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{
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_ENABLE,
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ARG_EMBEDDEDFONTS
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};
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static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB)
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);
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static GstStaticPadTemplate video_sink_factory =
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GST_STATIC_PAD_TEMPLATE ("video_sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB)
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);
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static GstStaticPadTemplate text_sink_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 ("application/x-ass; application/x-ssa")
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);
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static void gst_assrender_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_assrender_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_assrender_finalize (GObject * object);
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static GstStateChangeReturn gst_assrender_change_state (GstElement * element,
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GstStateChange transition);
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GST_BOILERPLATE (Gstassrender, gst_assrender, GstElement, GST_TYPE_ELEMENT);
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static GstCaps *gst_assrender_getcaps (GstPad * pad);
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static gboolean gst_assrender_setcaps_video (GstPad * pad, GstCaps * caps);
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static gboolean gst_assrender_setcaps_text (GstPad * pad, GstCaps * caps);
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static GstFlowReturn gst_assrender_chain_video (GstPad * pad, GstBuffer * buf);
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static GstFlowReturn gst_assrender_chain_text (GstPad * pad, GstBuffer * buf);
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static gboolean gst_assrender_event_video (GstPad * pad, GstEvent * event);
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static gboolean gst_assrender_event_text (GstPad * pad, GstEvent * event);
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static void
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gst_assrender_base_init (gpointer gclass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&video_sink_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&text_sink_factory));
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gst_element_class_set_details_simple (element_class, "ASS/SSA Render",
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"Mixer/Video/Overlay/Subtitle",
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"Renders ASS/SSA subtitles with libass",
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"Benjamin Schmitz <vortex@wolpzone.de>");
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}
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/* initialize the plugin's class */
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static void
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gst_assrender_class_init (GstassrenderClass * 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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gobject_class->set_property = gst_assrender_set_property;
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gobject_class->get_property = gst_assrender_get_property;
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gobject_class->finalize = gst_assrender_finalize;
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g_object_class_install_property (gobject_class, ARG_ENABLE,
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g_param_spec_boolean ("enable", "Toggle rendering",
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"Enable rendering of subtitles", TRUE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, ARG_EMBEDDEDFONTS,
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g_param_spec_boolean ("embeddedfonts", "Use embedded fonts",
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"Extract and use fonts embedded in the stream", TRUE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_assrender_change_state);
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}
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static void
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gst_assrender_init (Gstassrender * render, GstassrenderClass * gclass)
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{
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GST_DEBUG_OBJECT (render, "init");
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render->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
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render->video_sinkpad =
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gst_pad_new_from_static_template (&video_sink_factory, "video_sink");
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render->text_sinkpad =
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gst_pad_new_from_static_template (&text_sink_factory, "text_sink");
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gst_pad_set_setcaps_function (render->video_sinkpad,
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GST_DEBUG_FUNCPTR (gst_assrender_setcaps_video));
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gst_pad_set_setcaps_function (render->text_sinkpad,
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GST_DEBUG_FUNCPTR (gst_assrender_setcaps_text));
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gst_pad_set_getcaps_function (render->srcpad,
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GST_DEBUG_FUNCPTR (gst_assrender_getcaps));
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gst_pad_set_chain_function (render->video_sinkpad,
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GST_DEBUG_FUNCPTR (gst_assrender_chain_video));
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gst_pad_set_chain_function (render->text_sinkpad,
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GST_DEBUG_FUNCPTR (gst_assrender_chain_text));
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gst_pad_set_event_function (render->video_sinkpad,
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GST_DEBUG_FUNCPTR (gst_assrender_event_video));
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gst_pad_set_event_function (render->text_sinkpad,
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GST_DEBUG_FUNCPTR (gst_assrender_event_text));
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gst_element_add_pad (GST_ELEMENT (render), render->srcpad);
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gst_element_add_pad (GST_ELEMENT (render), render->video_sinkpad);
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gst_element_add_pad (GST_ELEMENT (render), render->text_sinkpad);
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render->width = 0;
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render->height = 0;
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render->subtitle_mutex = g_mutex_new ();
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render->subtitle_cond = g_cond_new ();
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render->renderer_init_ok = FALSE;
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render->track_init_ok = FALSE;
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render->enable = TRUE;
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render->embeddedfonts = TRUE;
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gst_segment_init (&render->video_segment, GST_FORMAT_TIME);
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render->ass_library = ass_library_init ();
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ass_set_fonts_dir (render->ass_library, "./");
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ass_set_extract_fonts (render->ass_library, 0);
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render->ass_renderer = ass_renderer_init (render->ass_library);
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if (!render->ass_renderer) {
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GST_WARNING_OBJECT (render, "cannot create renderer instance");
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g_assert_not_reached ();
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}
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render->ass_track = NULL;
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GST_DEBUG_OBJECT (render, "init complete");
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}
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static void
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gst_assrender_finalize (GObject * object)
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{
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Gstassrender *render = GST_ASSRENDER (object);
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if (render->subtitle_mutex)
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g_mutex_free (render->subtitle_mutex);
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if (render->subtitle_cond)
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g_cond_free (render->subtitle_cond);
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if (render->ass_track) {
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ass_free_track (render->ass_track);
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}
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if (render->ass_renderer) {
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ass_renderer_done (render->ass_renderer);
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}
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if (render->ass_library) {
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ass_library_done (render->ass_library);
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}
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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_assrender_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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Gstassrender *render = GST_ASSRENDER (object);
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switch (prop_id) {
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case ARG_ENABLE:
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render->enable = g_value_get_boolean (value);
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break;
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case ARG_EMBEDDEDFONTS:
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render->embeddedfonts = g_value_get_boolean (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_assrender_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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Gstassrender *render = GST_ASSRENDER (object);
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switch (prop_id) {
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case ARG_ENABLE:
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g_value_set_boolean (value, render->enable);
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break;
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case ARG_EMBEDDEDFONTS:
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g_value_set_boolean (value, render->embeddedfonts);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static GstStateChangeReturn
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gst_assrender_change_state (GstElement * element, GstStateChange transition)
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{
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Gstassrender *render = GST_ASSRENDER (element);
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GstStateChangeReturn ret;
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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render->subtitle_flushing = FALSE;
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break;
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case GST_STATE_CHANGE_NULL_TO_READY:
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case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
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default:
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break;
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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g_mutex_lock (render->subtitle_mutex);
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render->subtitle_flushing = TRUE;
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if (render->subtitle_pending)
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gst_buffer_unref (render->subtitle_pending);
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render->subtitle_pending = NULL;
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g_cond_signal (render->subtitle_cond);
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g_mutex_unlock (render->subtitle_mutex);
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break;
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}
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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if (render->ass_track)
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ass_free_track (render->ass_track);
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render->ass_track = NULL;
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render->track_init_ok = FALSE;
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render->renderer_init_ok = FALSE;
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break;
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case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
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case GST_STATE_CHANGE_READY_TO_NULL:
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default:
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break;
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}
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return ret;
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}
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static GstCaps *
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gst_assrender_getcaps (GstPad * pad)
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{
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Gstassrender *render;
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GstPad *otherpad;
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GstCaps *caps;
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render = GST_ASSRENDER (gst_pad_get_parent (pad));
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if (pad == render->srcpad)
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otherpad = render->video_sinkpad;
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else
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otherpad = render->srcpad;
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/* we can do what the peer can */
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caps = gst_pad_peer_get_caps (otherpad);
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if (caps) {
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GstCaps *temp;
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const GstCaps *templ;
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/* filtered against our padtemplate */
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templ = gst_pad_get_pad_template_caps (otherpad);
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temp = gst_caps_intersect (caps, templ);
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gst_caps_unref (caps);
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/* this is what we can do */
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caps = temp;
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} else {
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/* no peer, our padtemplate is enough then */
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caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
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}
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gst_object_unref (render);
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return caps;
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}
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static gboolean
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gst_assrender_setcaps_video (GstPad * pad, GstCaps * caps)
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{
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Gstassrender *render;
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GstStructure *structure;
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gboolean ret = FALSE;
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gint par_n = 1, par_d = 1;
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render = GST_ASSRENDER (gst_pad_get_parent (pad));
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render->width = 0;
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render->height = 0;
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structure = gst_caps_get_structure (caps, 0);
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gst_structure_get_fraction (structure, "pixel-aspect-ratio", &par_n, &par_d);
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if (gst_structure_get_int (structure, "width", &render->width) &&
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gst_structure_get_int (structure, "height", &render->height)) {
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gdouble dar;
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ret = gst_pad_set_caps (render->srcpad, caps);
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ass_set_frame_size (render->ass_renderer, render->width, render->height);
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dar = (((gdouble) par_n) * ((gdouble) render->width));
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dar /= (((gdouble) par_d) * ((gdouble) render->height));
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#if !defined(LIBASS_VERSION) || LIBASS_VERSION < 0x00907000
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ass_set_aspect_ratio (render->ass_renderer, dar);
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#else
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ass_set_aspect_ratio (render->ass_renderer,
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dar, ((gdouble) render->width) / ((gdouble) render->height));
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#endif
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ass_set_font_scale (render->ass_renderer, 1.0);
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ass_set_hinting (render->ass_renderer, ASS_HINTING_NATIVE);
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#if !defined(LIBASS_VERSION) || LIBASS_VERSION < 0x00907000
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ass_set_fonts (render->ass_renderer, "Arial", "sans-serif");
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ass_set_fonts (render->ass_renderer, NULL, "Sans");
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#else
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ass_set_fonts (render->ass_renderer, "Arial", "sans-serif", 1, NULL, 1);
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ass_set_fonts (render->ass_renderer, NULL, "Sans", 1, NULL, 1);
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#endif
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ass_set_margins (render->ass_renderer, 0, 0, 0, 0);
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ass_set_use_margins (render->ass_renderer, 0);
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render->renderer_init_ok = TRUE;
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GST_DEBUG_OBJECT (render, "ass renderer setup complete");
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} else {
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GST_ERROR_OBJECT (render, "Invalid caps %" GST_PTR_FORMAT, caps);
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ret = FALSE;
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}
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gst_object_unref (render);
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return ret;
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}
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static gboolean
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gst_assrender_setcaps_text (GstPad * pad, GstCaps * caps)
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{
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Gstassrender *render;
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GstStructure *structure;
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const GValue *value;
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GstBuffer *priv;
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gchar *codec_private;
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guint codec_private_size;
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gboolean ret = FALSE;
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render = GST_ASSRENDER (gst_pad_get_parent (pad));
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structure = gst_caps_get_structure (caps, 0);
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GST_DEBUG_OBJECT (render, "text pad linked with caps: %" GST_PTR_FORMAT,
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caps);
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value = gst_structure_get_value (structure, "codec_data");
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if (value != NULL) {
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priv = (GstBuffer *) gst_value_get_mini_object (value);
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g_return_val_if_fail (priv != NULL, FALSE);
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gst_buffer_ref (priv);
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codec_private = (gchar *) GST_BUFFER_DATA (priv);
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codec_private_size = GST_BUFFER_SIZE (priv);
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if (render->ass_track) {
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ass_free_track (render->ass_track);
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}
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render->ass_track = ass_new_track (render->ass_library);
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ass_process_codec_private (render->ass_track,
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codec_private, codec_private_size);
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GST_DEBUG_OBJECT (render, "ass track created");
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render->track_init_ok = TRUE;
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gst_buffer_unref (priv);
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ret = TRUE;
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} else if (!render->ass_track) {
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render->ass_track = ass_new_track (render->ass_library);
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ret = TRUE;
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}
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gst_object_unref (render);
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return ret;
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}
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static void
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gst_assrender_process_text (Gstassrender * render, GstBuffer * buffer)
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{
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char *data = (gchar *) GST_BUFFER_DATA (buffer);
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guint size = GST_BUFFER_SIZE (buffer);
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double pts_start, pts_end;
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pts_start = GST_BUFFER_TIMESTAMP (buffer);
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pts_start /= GST_MSECOND;
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pts_end = GST_BUFFER_DURATION (buffer);
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pts_end /= GST_MSECOND;
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ass_process_chunk (render->ass_track, data, size, pts_start, pts_end);
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gst_buffer_unref (buffer);
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}
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static GstFlowReturn
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gst_assrender_chain_video (GstPad * pad, GstBuffer * buffer)
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{
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Gstassrender *render;
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GstFlowReturn ret = GST_FLOW_OK;
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gboolean in_seg = FALSE;
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gint64 start, stop, clip_start = 0, clip_stop = 0;
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double timestamp;
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double step;
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ASS_Image *ass_image;
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render = GST_ASSRENDER (GST_PAD_PARENT (pad));
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if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
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GST_WARNING_OBJECT (render, "buffer without timestamp, discarding");
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gst_buffer_unref (buffer);
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return GST_FLOW_OK;
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}
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/* ignore buffers that are outside of the current segment */
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start = GST_BUFFER_TIMESTAMP (buffer);
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|
|
if (!GST_BUFFER_DURATION_IS_VALID (buffer)) {
|
|
stop = GST_CLOCK_TIME_NONE;
|
|
} else {
|
|
stop = start + GST_BUFFER_DURATION (buffer);
|
|
}
|
|
|
|
/* 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->video_segment.start)
|
|
goto out_of_segment;
|
|
|
|
in_seg =
|
|
gst_segment_clip (&render->video_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_metadata_writable (buffer);
|
|
GST_BUFFER_TIMESTAMP (buffer) = clip_start;
|
|
if (stop != -1)
|
|
GST_BUFFER_DURATION (buffer) = clip_stop - clip_start;
|
|
}
|
|
|
|
gst_segment_set_last_stop (&render->video_segment, GST_FORMAT_TIME,
|
|
clip_start);
|
|
|
|
g_mutex_lock (render->subtitle_mutex);
|
|
if (render->subtitle_pending) {
|
|
if (GST_BUFFER_TIMESTAMP (render->subtitle_pending) <=
|
|
GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer)) {
|
|
gst_assrender_process_text (render, render->subtitle_pending);
|
|
render->subtitle_pending = NULL;
|
|
g_cond_signal (render->subtitle_cond);
|
|
} else if (GST_BUFFER_TIMESTAMP (render->subtitle_pending) +
|
|
GST_BUFFER_DURATION (render->subtitle_pending) <=
|
|
GST_BUFFER_TIMESTAMP (buffer)) {
|
|
gst_buffer_unref (render->subtitle_pending);
|
|
render->subtitle_pending = NULL;
|
|
g_cond_signal (render->subtitle_cond);
|
|
}
|
|
}
|
|
g_mutex_unlock (render->subtitle_mutex);
|
|
|
|
/* now start rendering subtitles, if all conditions are met */
|
|
if (render->renderer_init_ok && render->track_init_ok && render->enable) {
|
|
int counter;
|
|
|
|
timestamp = GST_BUFFER_TIMESTAMP (buffer);
|
|
GST_DEBUG_OBJECT (render, "rendering frame for timestamp %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (timestamp));
|
|
/* libass needs timestamps in ms */
|
|
timestamp = timestamp / GST_MSECOND;
|
|
|
|
/* only for testing right now. could possibly be used for optimizations? */
|
|
step = ass_step_sub (render->ass_track, timestamp, 1);
|
|
GST_DEBUG_OBJECT (render, "Current timestamp: %" GST_TIME_FORMAT
|
|
" // Next event: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
|
|
GST_TIME_ARGS (step * GST_MSECOND));
|
|
|
|
/* not sure what the last parameter to this call is for (detect_change) */
|
|
ass_image = ass_render_frame (render->ass_renderer, render->ass_track,
|
|
timestamp, 0);
|
|
|
|
if (ass_image == NULL) {
|
|
GST_LOG_OBJECT (render, "nothing to render right now");
|
|
ret = gst_pad_push (render->srcpad, buffer);
|
|
return ret;
|
|
}
|
|
|
|
counter = 0;
|
|
while (ass_image) {
|
|
/* blend subtitles onto the video frame */
|
|
guint8 alpha = 255 - ((ass_image->color) & 0xff);
|
|
guint8 r = ((ass_image->color) >> 24) & 0xff;
|
|
guint8 g = ((ass_image->color) >> 16) & 0xff;
|
|
guint8 b = ((ass_image->color) >> 8) & 0xff;
|
|
|
|
guint8 *src = ass_image->bitmap;
|
|
guint8 *dst =
|
|
buffer->data + ass_image->dst_y * (render->width * 3) +
|
|
ass_image->dst_x * 3;
|
|
|
|
guint x = 0;
|
|
guint y = 0;
|
|
|
|
for (y = 0; y < ass_image->h; y++) {
|
|
for (x = 0; x < ass_image->w; x++) {
|
|
guint8 k = ((guint8) src[x]) * alpha / 255;
|
|
dst[x * 3] = (k * r + (255 - k) * dst[x * 3]) / 255;
|
|
dst[x * 3 + 1] = (k * g + (255 - k) * dst[x * 3 + 1]) / 255;
|
|
dst[x * 3 + 2] = (k * b + (255 - k) * dst[x * 3 + 2]) / 255;
|
|
}
|
|
src += ass_image->stride;
|
|
dst += render->width * 3;
|
|
}
|
|
counter++;
|
|
ass_image = ass_image->next;
|
|
}
|
|
GST_LOG_OBJECT (render, "amount of rendered ass_image: %d", counter);
|
|
}
|
|
|
|
ret = gst_pad_push (render->srcpad, buffer);
|
|
|
|
return ret;
|
|
|
|
out_of_segment:
|
|
{
|
|
GST_DEBUG_OBJECT (render, "buffer out of segment, discarding");
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_assrender_chain_text (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
Gstassrender *render;
|
|
GstClockTime timestamp, duration;
|
|
|
|
render = GST_ASSRENDER (GST_PAD_PARENT (pad));
|
|
|
|
if (render->subtitle_flushing)
|
|
return GST_FLOW_WRONG_STATE;
|
|
|
|
timestamp = GST_BUFFER_TIMESTAMP (buffer);
|
|
duration = GST_BUFFER_DURATION (buffer);
|
|
|
|
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (timestamp)
|
|
|| !GST_CLOCK_TIME_IS_VALID (duration))) {
|
|
GST_WARNING_OBJECT (render,
|
|
"Text buffer without valid timestamp" " or duration, dropping");
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
if (timestamp > render->video_segment.last_stop) {
|
|
g_assert (render->subtitle_pending == NULL);
|
|
g_mutex_lock (render->subtitle_mutex);
|
|
if (G_UNLIKELY (render->subtitle_flushing)) {
|
|
GST_DEBUG_OBJECT (render, "Text pad flushing");
|
|
gst_object_unref (buffer);
|
|
g_mutex_unlock (render->subtitle_mutex);
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
GST_DEBUG_OBJECT (render, "Too early buffer, waiting");
|
|
render->subtitle_pending = buffer;
|
|
g_cond_wait (render->subtitle_cond, render->subtitle_mutex);
|
|
g_mutex_unlock (render->subtitle_mutex);
|
|
} else if (timestamp + duration < render->video_segment.last_stop) {
|
|
GST_DEBUG_OBJECT (render, "Too late text buffer, dropping");
|
|
gst_buffer_unref (buffer);
|
|
ret = GST_FLOW_OK;
|
|
} else {
|
|
gst_assrender_process_text (render, buffer);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (render,
|
|
"processed text packet with timestamp %" GST_TIME_FORMAT
|
|
" and duration %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (timestamp), GST_TIME_ARGS (duration));
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_assrender_event_video (GstPad * pad, GstEvent * event)
|
|
{
|
|
gboolean ret = FALSE;
|
|
Gstassrender *render;
|
|
|
|
render = GST_ASSRENDER (gst_pad_get_parent (pad));
|
|
|
|
GST_DEBUG_OBJECT (pad, "received video event %s",
|
|
GST_EVENT_TYPE_NAME (event));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_NEWSEGMENT:
|
|
{
|
|
GstFormat format;
|
|
gdouble rate;
|
|
gint64 start, stop, time;
|
|
gboolean update;
|
|
|
|
GST_DEBUG_OBJECT (render, "received new segment");
|
|
|
|
gst_event_parse_new_segment (event, &update, &rate, &format, &start,
|
|
&stop, &time);
|
|
|
|
if (format == GST_FORMAT_TIME) {
|
|
GST_DEBUG_OBJECT (render, "VIDEO SEGMENT now: %" GST_SEGMENT_FORMAT,
|
|
&render->video_segment);
|
|
|
|
gst_segment_set_newsegment (&render->video_segment, update, rate,
|
|
format, start, stop, time);
|
|
} else {
|
|
GST_ELEMENT_WARNING (render, STREAM, MUX, (NULL),
|
|
("received non-TIME newsegment event on video input"));
|
|
}
|
|
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
case GST_EVENT_TAG:
|
|
{
|
|
GstTagList *taglist = gst_tag_list_new ();
|
|
guint tag_size;
|
|
guint index;
|
|
|
|
/* tag events may contain attachments which might be fonts */
|
|
GST_DEBUG_OBJECT (render, "got TAG event");
|
|
|
|
gst_event_parse_tag (event, &taglist);
|
|
tag_size = gst_tag_list_get_tag_size (taglist, GST_TAG_ATTACHMENT);
|
|
if (tag_size > 0 && render->embeddedfonts) {
|
|
const GValue *value;
|
|
GstBuffer *buf;
|
|
GstCaps *caps;
|
|
GstStructure *structure;
|
|
|
|
GST_DEBUG_OBJECT (render, "TAG event has attachments");
|
|
|
|
for (index = 0; index < tag_size; index++) {
|
|
value = gst_tag_list_get_value_index (taglist, GST_TAG_ATTACHMENT,
|
|
index);
|
|
buf = (GstBuffer *) gst_value_get_mini_object (value);
|
|
if (!buf) {
|
|
continue;
|
|
}
|
|
gst_buffer_ref (buf);
|
|
caps = GST_BUFFER_CAPS (buf);
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
if (gst_structure_has_name (structure, "application/x-truetype-font")
|
|
&& gst_structure_has_field (structure, "filename")) {
|
|
const gchar *filename;
|
|
filename = gst_structure_get_string (structure, "filename");
|
|
ass_add_font (render->ass_library, (gchar *) filename,
|
|
(gchar *) GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
|
|
GST_DEBUG_OBJECT (render, "registered new font %s", filename);
|
|
}
|
|
gst_buffer_unref (buf);
|
|
}
|
|
}
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
default:
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
|
|
gst_object_unref (render);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_assrender_event_text (GstPad * pad, GstEvent * event)
|
|
{
|
|
int i;
|
|
gboolean ret = FALSE;
|
|
Gstassrender *render;
|
|
|
|
render = GST_ASSRENDER (gst_pad_get_parent (pad));
|
|
|
|
GST_DEBUG_OBJECT (pad, "received text event %s", GST_EVENT_TYPE_NAME (event));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_NEWSEGMENT:
|
|
{
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
case GST_EVENT_FLUSH_STOP:
|
|
render->subtitle_flushing = FALSE;
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
case GST_EVENT_FLUSH_START:
|
|
GST_DEBUG_OBJECT (render, "begin flushing");
|
|
if (render->ass_track) {
|
|
GST_OBJECT_LOCK (render);
|
|
/* delete any events on the ass_track */
|
|
for (i = 0; i < render->ass_track->n_events; i++) {
|
|
GST_DEBUG_OBJECT (render, "deleted event with eid %i", i);
|
|
ass_free_event (render->ass_track, i);
|
|
}
|
|
render->ass_track->n_events = 0;
|
|
GST_OBJECT_UNLOCK (render);
|
|
GST_DEBUG_OBJECT (render, "done flushing");
|
|
}
|
|
g_mutex_lock (render->subtitle_mutex);
|
|
if (render->subtitle_pending)
|
|
gst_buffer_unref (render->subtitle_pending);
|
|
render->subtitle_pending = NULL;
|
|
render->subtitle_flushing = TRUE;
|
|
g_cond_signal (render->subtitle_cond);
|
|
g_mutex_unlock (render->subtitle_mutex);
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
case GST_EVENT_EOS:
|
|
GST_OBJECT_LOCK (render);
|
|
GST_INFO_OBJECT (render, "text EOS");
|
|
GST_OBJECT_UNLOCK (render);
|
|
gst_event_unref (event);
|
|
ret = TRUE;
|
|
break;
|
|
case GST_EVENT_TAG:
|
|
{
|
|
GstTagList *taglist = gst_tag_list_new ();
|
|
guint tag_size;
|
|
guint index;
|
|
|
|
GST_DEBUG_OBJECT (render, "got TAG event");
|
|
|
|
gst_event_parse_tag (event, &taglist);
|
|
tag_size = gst_tag_list_get_tag_size (taglist, GST_TAG_ATTACHMENT);
|
|
if (tag_size > 0 && render->embeddedfonts) {
|
|
const GValue *value;
|
|
GstBuffer *buf;
|
|
GstCaps *caps;
|
|
GstStructure *structure;
|
|
|
|
GST_DEBUG_OBJECT (render, "TAG event has attachments");
|
|
|
|
for (index = 0; index < tag_size; index++) {
|
|
value = gst_tag_list_get_value_index (taglist, GST_TAG_ATTACHMENT,
|
|
index);
|
|
buf = (GstBuffer *) gst_value_get_mini_object (value);
|
|
if (!buf) {
|
|
continue;
|
|
}
|
|
gst_buffer_ref (buf);
|
|
caps = GST_BUFFER_CAPS (buf);
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
if (gst_structure_has_name (structure, "application/x-truetype-font")
|
|
&& gst_structure_has_field (structure, "filename")) {
|
|
const gchar *filename;
|
|
filename = gst_structure_get_string (structure, "filename");
|
|
ass_add_font (render->ass_library, (gchar *) filename,
|
|
(gchar *) GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
|
|
GST_DEBUG_OBJECT (render, "registered new font %s", filename);
|
|
}
|
|
gst_buffer_unref (buf);
|
|
}
|
|
}
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
default:
|
|
ret = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
|
|
gst_object_unref (render);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
GST_DEBUG_CATEGORY_INIT (gst_assrender_debug, "assrender",
|
|
0, "ASS/SSA subtitle renderer");
|
|
|
|
return gst_element_register (plugin, "assrender",
|
|
GST_RANK_PRIMARY, GST_TYPE_ASSRENDER);
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
"assrender",
|
|
"ASS/SSA subtitle renderer",
|
|
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
|