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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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3438b7a880
Bitrotten and not really used in the wild. The actual render library (libtiger) is not just unmaintained but the upstream location has disappeared, and it's also not even packaged by e.g. debian/ubuntu. Closes #3071 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5408>
280 lines
8.4 KiB
C
280 lines
8.4 KiB
C
/* GStreamer
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* Copyright (C) 2011 David Schleef <ds@entropywave.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
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* Boston, MA 02110-1335, USA.
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*/
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/**
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* SECTION:element-intersubsrc
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* @title: gstintersubsrc
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*
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* The intersubsrc element is a subtitle source element. It is used
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* in connection with a intersubsink element in a different pipeline,
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* similar to interaudiosink and interaudiosrc.
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*
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* ## Example launch line
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* |[
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* gst-launch-1.0 -v intersubsrc ! srtenc ! filesink location=subtitles.srt
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* ]|
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*
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* The intersubsrc element cannot be used effectively with gst-launch-1.0,
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* as it requires a second pipeline in the application to send subtitles.
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* See the gstintertest.c example in the gst-plugins-bad source code for
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* more details.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gst/base/gstbasesrc.h>
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#include "gstintersubsrc.h"
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GST_DEBUG_CATEGORY_STATIC (gst_inter_sub_src_debug_category);
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#define GST_CAT_DEFAULT gst_inter_sub_src_debug_category
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/* prototypes */
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static void gst_inter_sub_src_set_property (GObject * object,
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guint property_id, const GValue * value, GParamSpec * pspec);
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static void gst_inter_sub_src_get_property (GObject * object,
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guint property_id, GValue * value, GParamSpec * pspec);
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static void gst_inter_sub_src_finalize (GObject * object);
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static gboolean gst_inter_sub_src_start (GstBaseSrc * src);
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static gboolean gst_inter_sub_src_stop (GstBaseSrc * src);
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static void
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gst_inter_sub_src_get_times (GstBaseSrc * src, GstBuffer * buffer,
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GstClockTime * start, GstClockTime * end);
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static GstFlowReturn
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gst_inter_sub_src_create (GstBaseSrc * src, guint64 offset, guint size,
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GstBuffer ** buf);
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enum
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{
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PROP_0,
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PROP_CHANNEL
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};
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#define DEFAULT_CHANNEL ("default")
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/* pad templates */
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static GstStaticPadTemplate gst_inter_sub_src_src_template =
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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 ("application/unknown")
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);
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/* class initialization */
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#define parent_class gst_inter_sub_src_parent_class
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G_DEFINE_TYPE (GstInterSubSrc, gst_inter_sub_src, GST_TYPE_BASE_SRC);
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GST_ELEMENT_REGISTER_DEFINE (intersubsrc, "intersubsrc", GST_RANK_NONE,
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GST_TYPE_INTER_SUB_SRC);
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static void
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gst_inter_sub_src_class_init (GstInterSubSrcClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstBaseSrcClass *base_src_class = GST_BASE_SRC_CLASS (klass);
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GST_DEBUG_CATEGORY_INIT (gst_inter_sub_src_debug_category, "intersubsrc", 0,
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"debug category for intersubsrc element");
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gst_element_class_add_static_pad_template (element_class,
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&gst_inter_sub_src_src_template);
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gst_element_class_set_static_metadata (element_class,
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"Internal subtitle source",
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"Source/Subtitle",
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"Virtual subtitle source for internal process communication",
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"David Schleef <ds@schleef.org>");
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gobject_class->set_property = gst_inter_sub_src_set_property;
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gobject_class->get_property = gst_inter_sub_src_get_property;
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gobject_class->finalize = gst_inter_sub_src_finalize;
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base_src_class->start = GST_DEBUG_FUNCPTR (gst_inter_sub_src_start);
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base_src_class->stop = GST_DEBUG_FUNCPTR (gst_inter_sub_src_stop);
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base_src_class->get_times = GST_DEBUG_FUNCPTR (gst_inter_sub_src_get_times);
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base_src_class->create = GST_DEBUG_FUNCPTR (gst_inter_sub_src_create);
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g_object_class_install_property (gobject_class, PROP_CHANNEL,
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g_param_spec_string ("channel", "Channel",
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"Channel name to match inter src and sink elements",
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DEFAULT_CHANNEL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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static void
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gst_inter_sub_src_init (GstInterSubSrc * intersubsrc)
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{
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gst_base_src_set_format (GST_BASE_SRC (intersubsrc), GST_FORMAT_TIME);
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gst_base_src_set_live (GST_BASE_SRC (intersubsrc), TRUE);
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intersubsrc->channel = g_strdup (DEFAULT_CHANNEL);
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}
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void
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gst_inter_sub_src_set_property (GObject * object, guint property_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstInterSubSrc *intersubsrc = GST_INTER_SUB_SRC (object);
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switch (property_id) {
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case PROP_CHANNEL:
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g_free (intersubsrc->channel);
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intersubsrc->channel = g_value_dup_string (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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void
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gst_inter_sub_src_get_property (GObject * object, guint property_id,
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GValue * value, GParamSpec * pspec)
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{
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GstInterSubSrc *intersubsrc = GST_INTER_SUB_SRC (object);
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switch (property_id) {
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case PROP_CHANNEL:
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g_value_set_string (value, intersubsrc->channel);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_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_inter_sub_src_finalize (GObject * object)
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{
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GstInterSubSrc *intersubsrc = GST_INTER_SUB_SRC (object);
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g_free (intersubsrc->channel);
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intersubsrc->channel = NULL;
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static gboolean
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gst_inter_sub_src_start (GstBaseSrc * src)
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{
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GstInterSubSrc *intersubsrc = GST_INTER_SUB_SRC (src);
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GST_DEBUG_OBJECT (intersubsrc, "start");
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intersubsrc->surface = gst_inter_surface_get (intersubsrc->channel);
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return TRUE;
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}
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static gboolean
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gst_inter_sub_src_stop (GstBaseSrc * src)
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{
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GstInterSubSrc *intersubsrc = GST_INTER_SUB_SRC (src);
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GST_DEBUG_OBJECT (intersubsrc, "stop");
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gst_inter_surface_unref (intersubsrc->surface);
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intersubsrc->surface = NULL;
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return TRUE;
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}
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static void
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gst_inter_sub_src_get_times (GstBaseSrc * src, GstBuffer * buffer,
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GstClockTime * start, GstClockTime * end)
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{
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GST_DEBUG_OBJECT (src, "get_times");
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/* for live sources, sync on the timestamp of the buffer */
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if (gst_base_src_is_live (src)) {
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GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buffer);
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if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
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/* get duration to calculate end time */
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GstClockTime duration = GST_BUFFER_DURATION (buffer);
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if (GST_CLOCK_TIME_IS_VALID (duration)) {
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*end = timestamp + duration;
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}
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*start = timestamp;
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}
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} else {
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*start = -1;
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*end = -1;
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}
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}
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static GstFlowReturn
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gst_inter_sub_src_create (GstBaseSrc * src, guint64 offset, guint size,
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GstBuffer ** buf)
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{
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GstInterSubSrc *intersubsrc = GST_INTER_SUB_SRC (src);
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GstBuffer *buffer;
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GST_DEBUG_OBJECT (intersubsrc, "create");
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buffer = NULL;
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g_mutex_lock (&intersubsrc->surface->mutex);
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if (intersubsrc->surface->sub_buffer) {
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buffer = gst_buffer_ref (intersubsrc->surface->sub_buffer);
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//intersubsrc->surface->sub_buffer_count++;
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//if (intersubsrc->surface->sub_buffer_count >= 30) {
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gst_buffer_unref (intersubsrc->surface->sub_buffer);
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intersubsrc->surface->sub_buffer = NULL;
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//}
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}
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g_mutex_unlock (&intersubsrc->surface->mutex);
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if (buffer == NULL) {
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GstMapInfo map;
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buffer = gst_buffer_new_and_alloc (1);
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gst_buffer_map (buffer, &map, GST_MAP_WRITE);
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map.data[0] = 0;
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gst_buffer_unmap (buffer, &map);
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}
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buffer = gst_buffer_make_writable (buffer);
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/* FIXME: does this make sense? Rate is always 0 */
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#if 0
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GST_BUFFER_TIMESTAMP (buffer) =
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gst_util_uint64_scale_int (GST_SECOND, intersubsrc->n_frames,
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intersubsrc->rate);
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GST_DEBUG_OBJECT (intersubsrc, "create ts %" GST_TIME_FORMAT,
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GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
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GST_BUFFER_DURATION (buffer) =
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gst_util_uint64_scale_int (GST_SECOND, (intersubsrc->n_frames + 1),
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intersubsrc->rate) - GST_BUFFER_TIMESTAMP (buffer);
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#endif
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GST_BUFFER_OFFSET (buffer) = intersubsrc->n_frames;
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GST_BUFFER_OFFSET_END (buffer) = -1;
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GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DISCONT);
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if (intersubsrc->n_frames == 0) {
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GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
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}
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intersubsrc->n_frames++;
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*buf = buffer;
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return GST_FLOW_OK;
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}
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