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617 lines
17 KiB
C
617 lines
17 KiB
C
/* GStreamer
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* Copyright (C) <2009> Collabora Ltd
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* @author: Olivier Crete <olivier.crete@collabora.co.uk
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* Copyright (C) <2009> Nokia Inc
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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 "gstshmsink.h"
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#include <gst/gst.h>
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#include <string.h>
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/* signals */
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enum
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{
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SIGNAL_CLIENT_CONNECTED,
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SIGNAL_CLIENT_DISCONNECTED,
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LAST_SIGNAL
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};
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/* properties */
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enum
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{
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PROP_0,
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PROP_SOCKET_PATH,
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PROP_PERMS,
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PROP_SHM_SIZE,
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PROP_WAIT_FOR_CONNECTION
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};
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struct GstShmClient
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{
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ShmClient *client;
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GstPollFD pollfd;
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};
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#define DEFAULT_SIZE ( 256 * 1024 )
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#define DEFAULT_WAIT_FOR_CONNECTION (TRUE)
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/* Default is user read/write, group read */
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#define DEFAULT_PERMS ( S_IRUSR | S_IWUSR | S_IRGRP )
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GST_DEBUG_CATEGORY_STATIC (shmsink_debug);
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#define GST_CAT_DEFAULT shmsink_debug
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static GstStaticPadTemplate sinktemplate = 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_ANY);
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GST_BOILERPLATE (GstShmSink, gst_shm_sink, GstBaseSink, GST_TYPE_BASE_SINK);
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static void gst_shm_sink_finalize (GObject * object);
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static void gst_shm_sink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_shm_sink_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_shm_sink_start (GstBaseSink * bsink);
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static gboolean gst_shm_sink_stop (GstBaseSink * bsink);
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static GstFlowReturn gst_shm_sink_render (GstBaseSink * bsink, GstBuffer * buf);
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static GstFlowReturn gst_shm_sink_buffer_alloc (GstBaseSink * sink,
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guint64 offset, guint size, GstCaps * caps, GstBuffer ** out_buf);
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static gboolean gst_shm_sink_event (GstBaseSink * bsink, GstEvent * event);
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static gboolean gst_shm_sink_unlock (GstBaseSink * bsink);
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static gboolean gst_shm_sink_unlock_stop (GstBaseSink * bsink);
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static gpointer pollthread_func (gpointer data);
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static guint signals[LAST_SIGNAL] = { 0 };
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static void
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gst_shm_sink_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sinktemplate));
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gst_element_class_set_details_simple (element_class,
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"Shared Memory Sink",
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"Sink",
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"Send data over shared memory to the matching source",
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"Olivier Crete <olivier.crete@collabora.co.uk>");
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}
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static void
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gst_shm_sink_init (GstShmSink * self, GstShmSinkClass * g_class)
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{
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self->cond = g_cond_new ();
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self->size = DEFAULT_SIZE;
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self->wait_for_connection = DEFAULT_WAIT_FOR_CONNECTION;
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self->perms = DEFAULT_PERMS;
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}
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static void
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gst_shm_sink_class_init (GstShmSinkClass * klass)
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{
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GObjectClass *gobject_class;
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GstBaseSinkClass *gstbasesink_class;
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gobject_class = (GObjectClass *) klass;
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gstbasesink_class = (GstBaseSinkClass *) klass;
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gobject_class->finalize = gst_shm_sink_finalize;
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gobject_class->set_property = gst_shm_sink_set_property;
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gobject_class->get_property = gst_shm_sink_get_property;
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gstbasesink_class->start = GST_DEBUG_FUNCPTR (gst_shm_sink_start);
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gstbasesink_class->stop = GST_DEBUG_FUNCPTR (gst_shm_sink_stop);
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gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_shm_sink_render);
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gstbasesink_class->event = GST_DEBUG_FUNCPTR (gst_shm_sink_event);
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gstbasesink_class->unlock = GST_DEBUG_FUNCPTR (gst_shm_sink_unlock);
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gstbasesink_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_shm_sink_unlock_stop);
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gstbasesink_class->buffer_alloc =
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GST_DEBUG_FUNCPTR (gst_shm_sink_buffer_alloc);
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g_object_class_install_property (gobject_class, PROP_SOCKET_PATH,
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g_param_spec_string ("socket-path",
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"Path to the control socket",
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"The path to the control socket used to control the shared memory"
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" transport", NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_PERMS,
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g_param_spec_uint ("perms",
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"Permissions on the shm area",
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"Permissions to set on the shm area",
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0, 07777, DEFAULT_PERMS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_SHM_SIZE,
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g_param_spec_uint ("shm-size",
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"Size of the shm area",
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"Size of the shared memory area",
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0, G_MAXUINT, DEFAULT_SIZE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_WAIT_FOR_CONNECTION,
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g_param_spec_boolean ("wait-for-connection",
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"Wait for a connection until rendering",
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"Block the stream until the shm pipe is connected",
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DEFAULT_WAIT_FOR_CONNECTION,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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signals[SIGNAL_CLIENT_CONNECTED] = g_signal_new ("client-connected",
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GST_TYPE_SHM_SINK, G_SIGNAL_RUN_LAST, 0, NULL, NULL,
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g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
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signals[SIGNAL_CLIENT_DISCONNECTED] = g_signal_new ("client-disconnected",
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GST_TYPE_SHM_SINK, G_SIGNAL_RUN_LAST, 0, NULL, NULL,
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g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
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GST_DEBUG_CATEGORY_INIT (shmsink_debug, "shmsink", 0, "Shared Memory Sink");
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}
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static void
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gst_shm_sink_finalize (GObject * object)
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{
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GstShmSink *self = GST_SHM_SINK (object);
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g_cond_free (self->cond);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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/*
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* Set the value of a property for the server sink.
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*/
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static void
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gst_shm_sink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstShmSink *self = GST_SHM_SINK (object);
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int ret = 0;
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switch (prop_id) {
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case PROP_SOCKET_PATH:
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GST_OBJECT_LOCK (object);
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g_free (self->socket_path);
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self->socket_path = g_value_dup_string (value);
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GST_OBJECT_UNLOCK (object);
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break;
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case PROP_PERMS:
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GST_OBJECT_LOCK (object);
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self->perms = g_value_get_uint (value);
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if (self->pipe)
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ret = sp_writer_setperms_shm (self->pipe, self->perms);
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GST_OBJECT_UNLOCK (object);
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if (ret < 0)
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GST_WARNING_OBJECT (object, "Could not set permissions on pipe: %s",
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strerror (ret));
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break;
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case PROP_SHM_SIZE:
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GST_OBJECT_LOCK (object);
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if (self->pipe) {
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if (sp_writer_resize (self->pipe, g_value_get_uint (value)) < 0)
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GST_DEBUG_OBJECT (self, "Resized shared memory area from %u to "
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"%u bytes", self->size, g_value_get_uint (value));
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else
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GST_WARNING_OBJECT (self, "Could not resize shared memory area from"
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"%u to %u bytes", self->size, g_value_get_uint (value));
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}
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self->size = g_value_get_uint (value);
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GST_OBJECT_UNLOCK (object);
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break;
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case PROP_WAIT_FOR_CONNECTION:
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GST_OBJECT_LOCK (object);
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self->wait_for_connection = g_value_get_boolean (value);
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GST_OBJECT_UNLOCK (object);
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g_cond_broadcast (self->cond);
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break;
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default:
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break;
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}
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}
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static void
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gst_shm_sink_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstShmSink *self = GST_SHM_SINK (object);
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GST_OBJECT_LOCK (object);
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switch (prop_id) {
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case PROP_SOCKET_PATH:
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g_value_set_string (value, self->socket_path);
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break;
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case PROP_PERMS:
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self->perms = g_value_get_uint (value);
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if (self->pipe) {
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int ret;
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ret = sp_writer_setperms_shm (self->pipe, self->perms);
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if (ret < 0)
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GST_WARNING_OBJECT (object, "Could not set permissions on pipe: %s",
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strerror (ret));
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}
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break;
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case PROP_SHM_SIZE:
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g_value_set_uint (value, self->size);
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break;
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case PROP_WAIT_FOR_CONNECTION:
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g_value_set_boolean (value, self->wait_for_connection);
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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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GST_OBJECT_UNLOCK (object);
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}
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static gboolean
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gst_shm_sink_start (GstBaseSink * bsink)
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{
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GstShmSink *self = GST_SHM_SINK (bsink);
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self->stop = FALSE;
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if (!self->socket_path) {
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GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
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("Could not open socket."), (NULL));
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return FALSE;
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}
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GST_DEBUG_OBJECT (self, "Creating new socket at %s"
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" with shared memory of %d bytes", self->socket_path, self->size);
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self->pipe = sp_writer_create (self->socket_path, self->size, self->perms);
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if (!self->pipe) {
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GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
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("Could not open socket."), (NULL));
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return FALSE;
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}
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sp_set_data (self->pipe, self);
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g_free (self->socket_path);
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self->socket_path = g_strdup (sp_writer_get_path (self->pipe));
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GST_DEBUG ("Created socket at %s", self->socket_path);
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self->poll = gst_poll_new (TRUE);
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gst_poll_fd_init (&self->serverpollfd);
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self->serverpollfd.fd = sp_get_fd (self->pipe);
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gst_poll_add_fd (self->poll, &self->serverpollfd);
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gst_poll_fd_ctl_read (self->poll, &self->serverpollfd, TRUE);
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self->pollthread = g_thread_create (pollthread_func, self, TRUE, NULL);
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if (!self->pollthread)
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goto thread_error;
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return TRUE;
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thread_error:
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sp_close (self->pipe);
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self->pipe = NULL;
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gst_poll_free (self->poll);
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GST_ELEMENT_ERROR (self, CORE, THREAD, ("Could not srart thread"), (NULL));
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return FALSE;
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}
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static gboolean
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gst_shm_sink_stop (GstBaseSink * bsink)
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{
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GstShmSink *self = GST_SHM_SINK (bsink);
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self->stop = TRUE;
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gst_poll_set_flushing (self->poll, TRUE);
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g_thread_join (self->pollthread);
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self->pollthread = NULL;
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GST_DEBUG_OBJECT (self, "Stopping");
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while (self->clients) {
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struct GstShmClient *client = self->clients->data;
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self->clients = g_list_remove (self->clients, client);
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sp_writer_close_client (self->pipe, client->client);
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g_signal_emit (self, signals[SIGNAL_CLIENT_DISCONNECTED], 0,
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client->pollfd.fd);
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g_slice_free (struct GstShmClient, client);
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}
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gst_poll_free (self->poll);
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self->poll = NULL;
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sp_close (self->pipe);
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self->pipe = NULL;
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return TRUE;
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}
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static GstFlowReturn
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gst_shm_sink_render (GstBaseSink * bsink, GstBuffer * buf)
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{
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GstShmSink *self = GST_SHM_SINK (bsink);
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int rv;
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GST_OBJECT_LOCK (self);
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while (self->wait_for_connection && !self->clients) {
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g_cond_wait (self->cond, GST_OBJECT_GET_LOCK (self));
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if (self->unlock) {
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GST_OBJECT_UNLOCK (self);
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return GST_FLOW_WRONG_STATE;
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}
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}
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rv = sp_writer_send_buf (self->pipe, (char *) GST_BUFFER_DATA (buf),
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GST_BUFFER_SIZE (buf));
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if (rv == -1) {
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ShmBlock *block = NULL;
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gchar *shmbuf = NULL;
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while ((block = sp_writer_alloc_block (self->pipe,
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GST_BUFFER_SIZE (buf))) == NULL) {
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g_cond_wait (self->cond, GST_OBJECT_GET_LOCK (self));
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if (self->unlock) {
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GST_OBJECT_UNLOCK (self);
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return GST_FLOW_WRONG_STATE;
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}
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}
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while (self->wait_for_connection && !self->clients) {
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g_cond_wait (self->cond, GST_OBJECT_GET_LOCK (self));
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if (self->unlock) {
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sp_writer_free_block (block);
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GST_OBJECT_UNLOCK (self);
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return GST_FLOW_WRONG_STATE;
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}
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}
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shmbuf = sp_writer_block_get_buf (block);
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memcpy (shmbuf, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
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sp_writer_send_buf (self->pipe, shmbuf, GST_BUFFER_SIZE (buf));
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sp_writer_free_block (block);
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}
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GST_OBJECT_UNLOCK (self);
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return GST_FLOW_OK;
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}
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static void
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gst_shm_sink_free_buffer (gpointer data)
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{
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ShmPipe *pipe;
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ShmBlock *block = data;
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GstShmSink *self;
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pipe = sp_writer_block_get_pipe (block);
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self = sp_get_data (pipe);
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GST_OBJECT_LOCK (self);
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sp_writer_free_block (block);
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GST_OBJECT_UNLOCK (self);
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g_object_unref (self);
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}
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static GstFlowReturn
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gst_shm_sink_buffer_alloc (GstBaseSink * sink, guint64 offset, guint size,
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GstCaps * caps, GstBuffer ** out_buf)
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{
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GstShmSink *self = GST_SHM_SINK (sink);
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GstBuffer *buffer;
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ShmBlock *block = NULL;
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gpointer buf = NULL;
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GST_OBJECT_LOCK (self);
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block = sp_writer_alloc_block (self->pipe, size);
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if (block) {
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buf = sp_writer_block_get_buf (block);
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g_object_ref (self);
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}
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GST_OBJECT_UNLOCK (self);
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if (block) {
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buffer = gst_buffer_new ();
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GST_BUFFER_DATA (buffer) = buf;
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GST_BUFFER_MALLOCDATA (buffer) = (guint8 *) block;
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GST_BUFFER_FREE_FUNC (buffer) =
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GST_DEBUG_FUNCPTR (gst_shm_sink_free_buffer);
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GST_BUFFER_SIZE (buffer) = size;
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GST_LOG_OBJECT (self,
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"Allocated buffer of %u bytes from shared memory at %p", size, buf);
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} else {
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buffer = gst_buffer_new_and_alloc (size);
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GST_LOG_OBJECT (self, "Not enough shared memory for buffer of %u bytes, "
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"allocating using standard allocator", size);
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}
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GST_BUFFER_OFFSET (buffer) = offset;
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gst_buffer_set_caps (buffer, caps);
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*out_buf = buffer;
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return GST_FLOW_OK;
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}
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static gpointer
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pollthread_func (gpointer data)
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{
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GstShmSink *self = GST_SHM_SINK (data);
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GList *item;
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while (!self->stop) {
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if (gst_poll_wait (self->poll, GST_CLOCK_TIME_NONE) < 0)
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return NULL;
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if (self->stop)
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return NULL;
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if (gst_poll_fd_has_closed (self->poll, &self->serverpollfd)) {
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GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed read from shmsink"),
|
|
("Control socket has closed"));
|
|
return NULL;
|
|
}
|
|
|
|
if (gst_poll_fd_has_error (self->poll, &self->serverpollfd)) {
|
|
GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed to read from shmsink"),
|
|
("Control socket has error"));
|
|
return NULL;
|
|
}
|
|
|
|
if (gst_poll_fd_can_read (self->poll, &self->serverpollfd)) {
|
|
ShmClient *client;
|
|
struct GstShmClient *gclient;
|
|
|
|
GST_OBJECT_LOCK (self);
|
|
client = sp_writer_accept_client (self->pipe);
|
|
GST_OBJECT_UNLOCK (self);
|
|
|
|
if (!client) {
|
|
GST_ELEMENT_ERROR (self, RESOURCE, READ,
|
|
("Failed to read from shmsink"),
|
|
("Control socket returns wrong data"));
|
|
return NULL;
|
|
}
|
|
|
|
gclient = g_slice_new (struct GstShmClient);
|
|
gclient->client = client;
|
|
gst_poll_fd_init (&gclient->pollfd);
|
|
gclient->pollfd.fd = sp_writer_get_client_fd (client);
|
|
gst_poll_add_fd (self->poll, &gclient->pollfd);
|
|
gst_poll_fd_ctl_read (self->poll, &gclient->pollfd, TRUE);
|
|
self->clients = g_list_prepend (self->clients, gclient);
|
|
g_signal_emit (self, signals[SIGNAL_CLIENT_CONNECTED], 0,
|
|
gclient->pollfd.fd);
|
|
/* we need to call gst_poll_wait before calling gst_poll_* status
|
|
functions on that new descriptor, so restart the loop, so _wait
|
|
will have been called on all elements of self->poll, whether
|
|
they have just been added or not. */
|
|
continue;
|
|
}
|
|
|
|
again:
|
|
for (item = self->clients; item; item = item->next) {
|
|
struct GstShmClient *gclient = item->data;
|
|
|
|
if (gst_poll_fd_has_closed (self->poll, &gclient->pollfd)) {
|
|
GST_WARNING_OBJECT (self, "One client is gone, closing");
|
|
goto close_client;
|
|
}
|
|
|
|
if (gst_poll_fd_has_error (self->poll, &gclient->pollfd)) {
|
|
GST_WARNING_OBJECT (self, "One client fd has error, closing");
|
|
goto close_client;
|
|
}
|
|
|
|
if (gst_poll_fd_can_read (self->poll, &gclient->pollfd)) {
|
|
int rv;
|
|
|
|
GST_OBJECT_LOCK (self);
|
|
rv = sp_writer_recv (self->pipe, gclient->client);
|
|
GST_OBJECT_UNLOCK (self);
|
|
|
|
if (rv < 0) {
|
|
GST_WARNING_OBJECT (self, "One client has read error,"
|
|
" closing (retval: %d errno: %d)", rv, errno);
|
|
goto close_client;
|
|
}
|
|
}
|
|
continue;
|
|
close_client:
|
|
GST_OBJECT_LOCK (self);
|
|
sp_writer_close_client (self->pipe, gclient->client);
|
|
GST_OBJECT_UNLOCK (self);
|
|
|
|
gst_poll_remove_fd (self->poll, &gclient->pollfd);
|
|
self->clients = g_list_remove (self->clients, gclient);
|
|
|
|
g_signal_emit (self, signals[SIGNAL_CLIENT_DISCONNECTED], 0,
|
|
gclient->pollfd.fd);
|
|
g_slice_free (struct GstShmClient, gclient);
|
|
|
|
goto again;
|
|
}
|
|
|
|
g_cond_broadcast (self->cond);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static gboolean
|
|
gst_shm_sink_event (GstBaseSink * bsink, GstEvent * event)
|
|
{
|
|
GstShmSink *self = GST_SHM_SINK (bsink);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_EOS:
|
|
GST_OBJECT_LOCK (self);
|
|
while (self->wait_for_connection && sp_writer_pending_writes (self->pipe)
|
|
&& !self->unlock)
|
|
g_cond_wait (self->cond, GST_OBJECT_GET_LOCK (self));
|
|
GST_OBJECT_UNLOCK (self);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
gst_shm_sink_unlock (GstBaseSink * bsink)
|
|
{
|
|
GstShmSink *self = GST_SHM_SINK (bsink);
|
|
|
|
GST_OBJECT_LOCK (self);
|
|
self->unlock = TRUE;
|
|
GST_OBJECT_UNLOCK (self);
|
|
|
|
g_cond_broadcast (self->cond);
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_shm_sink_unlock_stop (GstBaseSink * bsink)
|
|
{
|
|
GstShmSink *self = GST_SHM_SINK (bsink);
|
|
|
|
GST_OBJECT_LOCK (self);
|
|
self->unlock = FALSE;
|
|
GST_OBJECT_UNLOCK (self);
|
|
|
|
return TRUE;
|
|
}
|