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234 lines
7.1 KiB
C
234 lines
7.1 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-intersubsink
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* @title: gstintersubsink
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*
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* The intersubsink element is a subtitle sink element. It is used
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* in connection with a intersubsrc element in a different pipeline.
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*
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* ## Example launch line
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* |[
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* gst-launch-1.0 -v ... ! intersubsink
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* ]|
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*
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* The intersubsink 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 audio.
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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/gstbasesink.h>
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#include "gstintersubsink.h"
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GST_DEBUG_CATEGORY_STATIC (gst_inter_sub_sink_debug_category);
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#define GST_CAT_DEFAULT gst_inter_sub_sink_debug_category
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/* prototypes */
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static void gst_inter_sub_sink_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_sink_get_property (GObject * object,
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guint property_id, GValue * value, GParamSpec * pspec);
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static void gst_inter_sub_sink_finalize (GObject * object);
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static void gst_inter_sub_sink_get_times (GstBaseSink * sink,
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GstBuffer * buffer, GstClockTime * start, GstClockTime * end);
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static gboolean gst_inter_sub_sink_start (GstBaseSink * sink);
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static gboolean gst_inter_sub_sink_stop (GstBaseSink * sink);
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static GstFlowReturn
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gst_inter_sub_sink_render (GstBaseSink * sink, GstBuffer * buffer);
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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_sink_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("text/plain")
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);
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/* class initialization */
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#define parent_class gst_inter_sub_sink_parent_class
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G_DEFINE_TYPE (GstInterSubSink, gst_inter_sub_sink, GST_TYPE_BASE_SINK);
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GST_ELEMENT_REGISTER_DEFINE (intersubsink, "intersubsink", GST_RANK_NONE,
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GST_TYPE_INTER_SUB_SINK);
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static void
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gst_inter_sub_sink_class_init (GstInterSubSinkClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstBaseSinkClass *base_sink_class = GST_BASE_SINK_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GST_DEBUG_CATEGORY_INIT (gst_inter_sub_sink_debug_category, "intersubsink", 0,
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"debug category for intersubsink element");
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gst_element_class_add_static_pad_template (element_class,
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&gst_inter_sub_sink_sink_template);
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gst_element_class_set_static_metadata (element_class,
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"Internal subtitle sink",
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"Sink/Subtitle",
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"Virtual subtitle sink for internal process communication",
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"David Schleef <ds@schleef.org>");
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gobject_class->set_property = gst_inter_sub_sink_set_property;
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gobject_class->get_property = gst_inter_sub_sink_get_property;
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gobject_class->finalize = gst_inter_sub_sink_finalize;
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base_sink_class->get_times = GST_DEBUG_FUNCPTR (gst_inter_sub_sink_get_times);
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base_sink_class->start = GST_DEBUG_FUNCPTR (gst_inter_sub_sink_start);
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base_sink_class->stop = GST_DEBUG_FUNCPTR (gst_inter_sub_sink_stop);
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base_sink_class->render = GST_DEBUG_FUNCPTR (gst_inter_sub_sink_render);
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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_sink_init (GstInterSubSink * intersubsink)
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{
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intersubsink->channel = g_strdup (DEFAULT_CHANNEL);
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intersubsink->fps_n = 1;
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intersubsink->fps_d = 1;
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}
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void
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gst_inter_sub_sink_set_property (GObject * object, guint property_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (object);
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switch (property_id) {
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case PROP_CHANNEL:
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g_free (intersubsink->channel);
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intersubsink->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_sink_get_property (GObject * object, guint property_id,
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GValue * value, GParamSpec * pspec)
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{
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GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (object);
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switch (property_id) {
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case PROP_CHANNEL:
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g_value_set_string (value, intersubsink->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_sink_finalize (GObject * object)
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{
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GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (object);
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g_free (intersubsink->channel);
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intersubsink->channel = NULL;
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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_inter_sub_sink_get_times (GstBaseSink * sink, GstBuffer * buffer,
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GstClockTime * start, GstClockTime * end)
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{
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GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (sink);
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if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
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*start = GST_BUFFER_TIMESTAMP (buffer);
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if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
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*end = *start + GST_BUFFER_DURATION (buffer);
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} else {
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if (intersubsink->fps_n > 0) {
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*end = *start +
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gst_util_uint64_scale_int (GST_SECOND, intersubsink->fps_d,
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intersubsink->fps_n);
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}
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}
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}
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}
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static gboolean
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gst_inter_sub_sink_start (GstBaseSink * sink)
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{
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GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (sink);
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intersubsink->surface = gst_inter_surface_get (intersubsink->channel);
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return TRUE;
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}
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static gboolean
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gst_inter_sub_sink_stop (GstBaseSink * sink)
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{
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GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (sink);
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g_mutex_lock (&intersubsink->surface->mutex);
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if (intersubsink->surface->sub_buffer) {
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gst_buffer_unref (intersubsink->surface->sub_buffer);
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}
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intersubsink->surface->sub_buffer = NULL;
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g_mutex_unlock (&intersubsink->surface->mutex);
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gst_inter_surface_unref (intersubsink->surface);
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intersubsink->surface = NULL;
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return TRUE;
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}
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static GstFlowReturn
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gst_inter_sub_sink_render (GstBaseSink * sink, GstBuffer * buffer)
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{
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GstInterSubSink *intersubsink = GST_INTER_SUB_SINK (sink);
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g_mutex_lock (&intersubsink->surface->mutex);
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if (intersubsink->surface->sub_buffer) {
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gst_buffer_unref (intersubsink->surface->sub_buffer);
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}
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intersubsink->surface->sub_buffer = gst_buffer_ref (buffer);
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//intersubsink->surface->sub_buffer_count = 0;
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g_mutex_unlock (&intersubsink->surface->mutex);
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return GST_FLOW_OK;
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}
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