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258 lines
8.2 KiB
C
258 lines
8.2 KiB
C
/* GStreamer
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* Copyright (C) 2011 David A. Schleef <ds@schleef.org>
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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-gstintervideosink
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*
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* The intervideosink element is a video sink element. It is used
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* in connection with an intervideosrc element in a different pipeline,
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* similar to interaudiosink and interaudiosrc.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch -v videotestsrc ! intervideosink
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* ]|
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*
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* The intervideosink element cannot be used effectively with gst-launch,
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* as it requires a second pipeline in the application to send video to.
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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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* </refsect2>
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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 <gst/video/video.h>
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#include "gstintervideosink.h"
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#include <string.h>
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GST_DEBUG_CATEGORY_STATIC (gst_inter_video_sink_debug_category);
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#define GST_CAT_DEFAULT gst_inter_video_sink_debug_category
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/* prototypes */
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static void gst_inter_video_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_video_sink_get_property (GObject * object,
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guint property_id, GValue * value, GParamSpec * pspec);
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static void gst_inter_video_sink_finalize (GObject * object);
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static void gst_inter_video_sink_get_times (GstBaseSink * sink,
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GstBuffer * buffer, GstClockTime * start, GstClockTime * end);
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static gboolean gst_inter_video_sink_start (GstBaseSink * sink);
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static gboolean gst_inter_video_sink_stop (GstBaseSink * sink);
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static gboolean gst_inter_video_sink_set_caps (GstBaseSink * sink,
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GstCaps * caps);
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static GstFlowReturn gst_inter_video_sink_render (GstBaseSink * sink,
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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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/* pad templates */
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static GstStaticPadTemplate gst_inter_video_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 (GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL))
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);
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/* class initialization */
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G_DEFINE_TYPE (GstInterVideoSink, gst_inter_video_sink, GST_TYPE_BASE_SINK);
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static void
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gst_inter_video_sink_class_init (GstInterVideoSinkClass * 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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GstBaseSinkClass *base_sink_class = GST_BASE_SINK_CLASS (klass);
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GST_DEBUG_CATEGORY_INIT (gst_inter_video_sink_debug_category,
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"intervideosink", 0, "debug category for intervideosink element");
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_inter_video_sink_sink_template));
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gst_element_class_set_static_metadata (element_class,
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"Internal video sink",
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"Sink/Video",
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"Virtual video sink for internal process communication",
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"David Schleef <ds@schleef.org>");
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gobject_class->set_property = gst_inter_video_sink_set_property;
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gobject_class->get_property = gst_inter_video_sink_get_property;
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gobject_class->finalize = gst_inter_video_sink_finalize;
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base_sink_class->get_times =
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GST_DEBUG_FUNCPTR (gst_inter_video_sink_get_times);
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base_sink_class->start = GST_DEBUG_FUNCPTR (gst_inter_video_sink_start);
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base_sink_class->stop = GST_DEBUG_FUNCPTR (gst_inter_video_sink_stop);
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base_sink_class->render = GST_DEBUG_FUNCPTR (gst_inter_video_sink_render);
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base_sink_class->set_caps = GST_DEBUG_FUNCPTR (gst_inter_video_sink_set_caps);
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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", G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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static void
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gst_inter_video_sink_init (GstInterVideoSink * intervideosink)
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{
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intervideosink->channel = g_strdup ("default");
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}
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void
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gst_inter_video_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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GstInterVideoSink *intervideosink = GST_INTER_VIDEO_SINK (object);
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switch (property_id) {
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case PROP_CHANNEL:
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g_free (intervideosink->channel);
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intervideosink->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_video_sink_get_property (GObject * object, guint property_id,
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GValue * value, GParamSpec * pspec)
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{
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GstInterVideoSink *intervideosink = GST_INTER_VIDEO_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, intervideosink->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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void
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gst_inter_video_sink_finalize (GObject * object)
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{
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GstInterVideoSink *intervideosink = GST_INTER_VIDEO_SINK (object);
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/* clean up object here */
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g_free (intervideosink->channel);
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G_OBJECT_CLASS (gst_inter_video_sink_parent_class)->finalize (object);
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}
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static void
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gst_inter_video_sink_get_times (GstBaseSink * sink, GstBuffer * buffer,
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GstClockTime * start, GstClockTime * end)
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{
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GstInterVideoSink *intervideosink = GST_INTER_VIDEO_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 (intervideosink->info.fps_n > 0) {
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*end = *start +
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gst_util_uint64_scale_int (GST_SECOND, intervideosink->info.fps_d,
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intervideosink->info.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_video_sink_start (GstBaseSink * sink)
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{
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GstInterVideoSink *intervideosink = GST_INTER_VIDEO_SINK (sink);
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intervideosink->surface = gst_inter_surface_get (intervideosink->channel);
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g_mutex_lock (&intervideosink->surface->mutex);
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memset (&intervideosink->surface->video_info, 0, sizeof (GstVideoInfo));
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g_mutex_unlock (&intervideosink->surface->mutex);
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return TRUE;
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}
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static gboolean
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gst_inter_video_sink_stop (GstBaseSink * sink)
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{
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GstInterVideoSink *intervideosink = GST_INTER_VIDEO_SINK (sink);
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g_mutex_lock (&intervideosink->surface->mutex);
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if (intervideosink->surface->video_buffer) {
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gst_buffer_unref (intervideosink->surface->video_buffer);
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}
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intervideosink->surface->video_buffer = NULL;
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memset (&intervideosink->surface->video_info, 0, sizeof (GstVideoInfo));
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g_mutex_unlock (&intervideosink->surface->mutex);
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gst_inter_surface_unref (intervideosink->surface);
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intervideosink->surface = NULL;
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return TRUE;
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}
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static gboolean
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gst_inter_video_sink_set_caps (GstBaseSink * sink, GstCaps * caps)
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{
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GstInterVideoSink *intervideosink = GST_INTER_VIDEO_SINK (sink);
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GstVideoInfo info;
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if (!gst_video_info_from_caps (&info, caps)) {
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GST_ERROR_OBJECT (sink, "Failed to parse caps %" GST_PTR_FORMAT, caps);
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return FALSE;
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}
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g_mutex_lock (&intervideosink->surface->mutex);
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intervideosink->surface->video_info = info;
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intervideosink->info = info;
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g_mutex_unlock (&intervideosink->surface->mutex);
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return TRUE;
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}
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static GstFlowReturn
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gst_inter_video_sink_render (GstBaseSink * sink, GstBuffer * buffer)
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{
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GstInterVideoSink *intervideosink = GST_INTER_VIDEO_SINK (sink);
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g_mutex_lock (&intervideosink->surface->mutex);
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if (intervideosink->surface->video_buffer) {
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gst_buffer_unref (intervideosink->surface->video_buffer);
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}
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intervideosink->surface->video_buffer = gst_buffer_ref (buffer);
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intervideosink->surface->video_buffer_count = 0;
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g_mutex_unlock (&intervideosink->surface->mutex);
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return GST_FLOW_OK;
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}
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