mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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952 lines
27 KiB
C
952 lines
27 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-shmsink
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*
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* Send data over shared memory to the matching source.
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*
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* <refsect2>
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* <title>Example launch lines</title>
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* |[
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* gst-launch -v videotestsrc ! shmsink socket-path=/tmp/blah shm-size=1000000
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* ]| Send video to shm buffers.
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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 "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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PROP_BUFFER_TIME
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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 ( 64 * 1024 * 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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#define gst_shm_sink_parent_class parent_class
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G_DEFINE_TYPE (GstShmSink, gst_shm_sink, 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 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 gboolean gst_shm_sink_propose_allocation (GstBaseSink * sink,
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GstQuery * query);
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static gpointer pollthread_func (gpointer data);
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static guint signals[LAST_SIGNAL] = { 0 };
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/********************
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* CUSTOM ALLOCATOR *
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********************/
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#define GST_TYPE_SHM_SINK_ALLOCATOR \
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(gst_shm_sink_allocator_get_type())
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#define GST_SHM_SINK_ALLOCATOR(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SHM_SINK_ALLOCATOR, \
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GstShmSinkAllocator))
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#define GST_SHM_SINK_ALLOCATOR_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SHM_SINK_ALLOCATOR, \
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GstShmSinkAllocatorClass))
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#define GST_IS_SHM_SINK_ALLOCATOR(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SHM_SINK_ALLOCATOR))
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#define GST_IS_SHM_SINK_ALLOCATOR_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SHM_SINK_ALLOCATOR))
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struct _GstShmSinkAllocator
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{
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GstAllocator parent;
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GstShmSink *sink;
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};
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typedef struct _GstShmSinkAllocatorClass
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{
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GstAllocatorClass parent;
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} GstShmSinkAllocatorClass;
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typedef struct _GstShmSinkMemory
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{
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GstMemory mem;
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gchar *data;
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GstShmSink *sink;
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ShmBlock *block;
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} GstShmSinkMemory;
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GType gst_shm_sink_allocator_get_type (void);
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G_DEFINE_TYPE (GstShmSinkAllocator, gst_shm_sink_allocator, GST_TYPE_ALLOCATOR);
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static void
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gst_shm_sink_allocator_dispose (GObject * object)
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{
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GstShmSinkAllocator *self = GST_SHM_SINK_ALLOCATOR (object);
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if (self->sink)
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gst_object_unref (self->sink);
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self->sink = NULL;
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G_OBJECT_CLASS (gst_shm_sink_allocator_parent_class)->dispose (object);
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}
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static void
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gst_shm_sink_allocator_free (GstAllocator * allocator, GstMemory * mem)
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{
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GstShmSinkMemory *mymem = (GstShmSinkMemory *) mem;
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if (mymem->block) {
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GST_OBJECT_LOCK (mymem->sink);
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sp_writer_free_block (mymem->block);
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GST_OBJECT_UNLOCK (mymem->sink);
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gst_object_unref (mymem->sink);
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}
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gst_object_unref (mem->allocator);
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g_slice_free (GstShmSinkMemory, mymem);
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}
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static gpointer
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gst_shm_sink_allocator_mem_map (GstMemory * mem, gsize maxsize,
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GstMapFlags flags)
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{
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GstShmSinkMemory *mymem = (GstShmSinkMemory *) mem;
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return mymem->data;
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}
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static void
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gst_shm_sink_allocator_mem_unmap (GstMemory * mem)
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{
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}
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static GstMemory *
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gst_shm_sink_allocator_mem_share (GstMemory * mem, gssize offset, gssize size)
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{
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GstShmSinkMemory *mymem = (GstShmSinkMemory *) mem;
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GstShmSinkMemory *mysub;
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GstMemory *parent;
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/* find the real parent */
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if ((parent = mem->parent) == NULL)
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parent = mem;
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if (size == -1)
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size = mem->size - offset;
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mysub = g_slice_new0 (GstShmSinkMemory);
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/* the shared memory is always readonly */
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gst_memory_init (GST_MEMORY_CAST (mysub), GST_MINI_OBJECT_FLAGS (parent) |
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GST_MINI_OBJECT_FLAG_LOCK_READONLY, gst_object_ref (mem->allocator),
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parent, mem->maxsize, mem->align, mem->offset + offset, size);
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mysub->data = mymem->data;
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return (GstMemory *) mysub;
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}
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static gboolean
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gst_shm_sink_allocator_mem_is_span (GstMemory * mem1, GstMemory * mem2,
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gsize * offset)
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{
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GstShmSinkMemory *mymem1 = (GstShmSinkMemory *) mem1;
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GstShmSinkMemory *mymem2 = (GstShmSinkMemory *) mem2;
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if (offset) {
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GstMemory *parent;
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parent = mem1->parent;
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*offset = mem1->offset - parent->offset;
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}
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/* and memory is contiguous */
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return mymem1->data + mem1->offset + mem1->size ==
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mymem2->data + mem2->offset;
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}
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static void
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gst_shm_sink_allocator_init (GstShmSinkAllocator * self)
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{
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GstAllocator *allocator = GST_ALLOCATOR (self);
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allocator->mem_map = gst_shm_sink_allocator_mem_map;
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allocator->mem_unmap = gst_shm_sink_allocator_mem_unmap;
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allocator->mem_share = gst_shm_sink_allocator_mem_share;
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allocator->mem_is_span = gst_shm_sink_allocator_mem_is_span;
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}
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static GstMemory *
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gst_shm_sink_allocator_alloc_locked (GstShmSinkAllocator * self, gsize size,
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GstAllocationParams * params)
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{
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GstMemory *memory = NULL;
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ShmBlock *block = NULL;
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gsize maxsize = size + params->prefix + params->padding;
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gsize align = params->align;
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/* ensure configured alignment */
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align |= gst_memory_alignment;
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/* allocate more to compensate for alignment */
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maxsize += align;
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block = sp_writer_alloc_block (self->sink->pipe, maxsize);
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if (block) {
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GstShmSinkMemory *mymem;
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gsize aoffset, padding;
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GST_LOG_OBJECT (self,
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"Allocated block %p with %" G_GSIZE_FORMAT " bytes at %p", block, size,
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sp_writer_block_get_buf (block));
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mymem = g_slice_new0 (GstShmSinkMemory);
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memory = GST_MEMORY_CAST (mymem);
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mymem->data = sp_writer_block_get_buf (block);
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mymem->sink = gst_object_ref (self->sink);
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mymem->block = block;
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/* do alignment */
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if ((aoffset = ((guintptr) mymem->data & align))) {
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aoffset = (align + 1) - aoffset;
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mymem->data += aoffset;
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maxsize -= aoffset;
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}
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if (params->prefix && (params->flags & GST_MEMORY_FLAG_ZERO_PREFIXED))
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memset (mymem->data, 0, params->prefix);
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padding = maxsize - (params->prefix + size);
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if (padding && (params->flags & GST_MEMORY_FLAG_ZERO_PADDED))
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memset (mymem->data + params->prefix + size, 0, padding);
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gst_memory_init (memory, params->flags, g_object_ref (self), NULL,
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maxsize, align, params->prefix, size);
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}
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return memory;
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}
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static GstMemory *
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gst_shm_sink_allocator_alloc (GstAllocator * allocator, gsize size,
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GstAllocationParams * params)
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{
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GstShmSinkAllocator *self = GST_SHM_SINK_ALLOCATOR (allocator);
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GstMemory *memory = NULL;
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GST_OBJECT_LOCK (self->sink);
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memory = gst_shm_sink_allocator_alloc_locked (self, size, params);
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GST_OBJECT_UNLOCK (self->sink);
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if (!memory) {
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memory = gst_allocator_alloc (NULL, size, params);
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GST_LOG_OBJECT (self,
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"Not enough shared memory for GstMemory of %" G_GSIZE_FORMAT
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"bytes, allocating using standard allocator", size);
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}
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return memory;
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}
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static void
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gst_shm_sink_allocator_class_init (GstShmSinkAllocatorClass * klass)
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{
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GstAllocatorClass *allocator_class = GST_ALLOCATOR_CLASS (klass);
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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allocator_class->alloc = gst_shm_sink_allocator_alloc;
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allocator_class->free = gst_shm_sink_allocator_free;
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object_class->dispose = gst_shm_sink_allocator_dispose;
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}
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static GstShmSinkAllocator *
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gst_shm_sink_allocator_new (GstShmSink * sink)
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{
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GstShmSinkAllocator *self = g_object_new (GST_TYPE_SHM_SINK_ALLOCATOR, NULL);
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self->sink = gst_object_ref (sink);
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return self;
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}
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/***************
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* MAIN OBJECT *
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***************/
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static void
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gst_shm_sink_init (GstShmSink * self)
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{
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g_cond_init (&self->cond);
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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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gst_allocation_params_init (&self->params);
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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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GstElementClass *gstelement_class;
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GstBaseSinkClass *gstbasesink_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) 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->propose_allocation =
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GST_DEBUG_FUNCPTR (gst_shm_sink_propose_allocation);
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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. This may be modified during the NULL->READY transition",
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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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g_object_class_install_property (gobject_class, PROP_BUFFER_TIME,
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g_param_spec_int64 ("buffer-time",
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"Buffer Time of the shm buffer",
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"Maximum Size of the shm buffer in nanoseconds (-1 to disable)",
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-1, G_MAXINT64, -1,
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G_PARAM_CONSTRUCT | 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_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&sinktemplate));
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gst_element_class_set_static_metadata (gstelement_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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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_clear (&self->cond);
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g_free (self->socket_path);
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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);
|
|
if (ret < 0)
|
|
GST_WARNING_OBJECT (object, "Could not set permissions on pipe: %s",
|
|
strerror (ret));
|
|
break;
|
|
case PROP_SHM_SIZE:
|
|
GST_OBJECT_LOCK (object);
|
|
if (self->pipe) {
|
|
if (sp_writer_resize (self->pipe, g_value_get_uint (value)) < 0) {
|
|
/* Swap allocators, so we can know immediately if the memory is
|
|
* ours */
|
|
gst_object_unref (self->allocator);
|
|
self->allocator = gst_shm_sink_allocator_new (self);
|
|
|
|
GST_DEBUG_OBJECT (self, "Resized shared memory area from %u to "
|
|
"%u bytes", self->size, g_value_get_uint (value));
|
|
} else {
|
|
GST_WARNING_OBJECT (self, "Could not resize shared memory area from"
|
|
"%u to %u bytes", self->size, g_value_get_uint (value));
|
|
}
|
|
}
|
|
self->size = g_value_get_uint (value);
|
|
GST_OBJECT_UNLOCK (object);
|
|
break;
|
|
case PROP_WAIT_FOR_CONNECTION:
|
|
GST_OBJECT_LOCK (object);
|
|
self->wait_for_connection = g_value_get_boolean (value);
|
|
GST_OBJECT_UNLOCK (object);
|
|
g_cond_broadcast (&self->cond);
|
|
break;
|
|
case PROP_BUFFER_TIME:
|
|
GST_OBJECT_LOCK (object);
|
|
self->buffer_time = g_value_get_int64 (value);
|
|
GST_OBJECT_UNLOCK (object);
|
|
g_cond_broadcast (&self->cond);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_shm_sink_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstShmSink *self = GST_SHM_SINK (object);
|
|
|
|
GST_OBJECT_LOCK (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_SOCKET_PATH:
|
|
g_value_set_string (value, self->socket_path);
|
|
break;
|
|
case PROP_PERMS:
|
|
g_value_set_uint (value, self->perms);
|
|
break;
|
|
case PROP_SHM_SIZE:
|
|
g_value_set_uint (value, self->size);
|
|
break;
|
|
case PROP_WAIT_FOR_CONNECTION:
|
|
g_value_set_boolean (value, self->wait_for_connection);
|
|
break;
|
|
case PROP_BUFFER_TIME:
|
|
g_value_set_int64 (value, self->buffer_time);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
|
|
GST_OBJECT_UNLOCK (object);
|
|
}
|
|
|
|
|
|
|
|
static gboolean
|
|
gst_shm_sink_start (GstBaseSink * bsink)
|
|
{
|
|
GstShmSink *self = GST_SHM_SINK (bsink);
|
|
GError *err = NULL;
|
|
|
|
self->stop = FALSE;
|
|
|
|
if (!self->socket_path) {
|
|
GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
|
|
("Could not open socket."), (NULL));
|
|
return FALSE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (self, "Creating new socket at %s"
|
|
" with shared memory of %d bytes", self->socket_path, self->size);
|
|
|
|
self->pipe = sp_writer_create (self->socket_path, self->size, self->perms);
|
|
|
|
if (!self->pipe) {
|
|
GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
|
|
("Could not open socket."), (NULL));
|
|
return FALSE;
|
|
}
|
|
|
|
sp_set_data (self->pipe, self);
|
|
g_free (self->socket_path);
|
|
self->socket_path = g_strdup (sp_writer_get_path (self->pipe));
|
|
|
|
GST_DEBUG ("Created socket at %s", self->socket_path);
|
|
|
|
self->poll = gst_poll_new (TRUE);
|
|
gst_poll_fd_init (&self->serverpollfd);
|
|
self->serverpollfd.fd = sp_get_fd (self->pipe);
|
|
gst_poll_add_fd (self->poll, &self->serverpollfd);
|
|
gst_poll_fd_ctl_read (self->poll, &self->serverpollfd, TRUE);
|
|
|
|
self->pollthread =
|
|
g_thread_try_new ("gst-shmsink-poll-thread", pollthread_func, self, &err);
|
|
|
|
if (!self->pollthread)
|
|
goto thread_error;
|
|
|
|
self->allocator = gst_shm_sink_allocator_new (self);
|
|
|
|
return TRUE;
|
|
|
|
thread_error:
|
|
|
|
sp_writer_close (self->pipe, NULL, NULL);
|
|
self->pipe = NULL;
|
|
gst_poll_free (self->poll);
|
|
|
|
GST_ELEMENT_ERROR (self, CORE, THREAD, ("Could not start thread"),
|
|
("%s", err->message));
|
|
g_error_free (err);
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
gst_shm_sink_stop (GstBaseSink * bsink)
|
|
{
|
|
GstShmSink *self = GST_SHM_SINK (bsink);
|
|
|
|
self->stop = TRUE;
|
|
gst_poll_set_flushing (self->poll, TRUE);
|
|
|
|
if (self->allocator)
|
|
gst_object_unref (self->allocator);
|
|
self->allocator = NULL;
|
|
|
|
g_thread_join (self->pollthread);
|
|
self->pollthread = NULL;
|
|
|
|
GST_DEBUG_OBJECT (self, "Stopping");
|
|
|
|
while (self->clients) {
|
|
struct GstShmClient *client = self->clients->data;
|
|
self->clients = g_list_remove (self->clients, client);
|
|
sp_writer_close_client (self->pipe, client->client,
|
|
(sp_buffer_free_callback) gst_buffer_unref, NULL);
|
|
g_signal_emit (self, signals[SIGNAL_CLIENT_DISCONNECTED], 0,
|
|
client->pollfd.fd);
|
|
g_slice_free (struct GstShmClient, client);
|
|
}
|
|
|
|
gst_poll_free (self->poll);
|
|
self->poll = NULL;
|
|
|
|
sp_writer_close (self->pipe, NULL, NULL);
|
|
self->pipe = NULL;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_shm_sink_can_render (GstShmSink * self, GstClockTime time)
|
|
{
|
|
ShmBuffer *b;
|
|
|
|
if (time == GST_CLOCK_TIME_NONE || self->buffer_time == GST_CLOCK_TIME_NONE)
|
|
return TRUE;
|
|
|
|
b = sp_writer_get_pending_buffers (self->pipe);
|
|
for (; b != NULL; b = sp_writer_get_next_buffer (b)) {
|
|
GstBuffer *buf = sp_writer_buf_get_tag (b);
|
|
if (GST_CLOCK_DIFF (time, GST_BUFFER_PTS (buf)) > self->buffer_time)
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_shm_sink_render (GstBaseSink * bsink, GstBuffer * buf)
|
|
{
|
|
GstShmSink *self = GST_SHM_SINK (bsink);
|
|
int rv = 0;
|
|
GstMapInfo map;
|
|
gboolean need_new_memory = FALSE;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstMemory *memory = NULL;
|
|
GstBuffer *sendbuf = NULL;
|
|
|
|
GST_OBJECT_LOCK (self);
|
|
while (self->wait_for_connection && !self->clients) {
|
|
g_cond_wait (&self->cond, GST_OBJECT_GET_LOCK (self));
|
|
if (self->unlock)
|
|
goto flushing;
|
|
}
|
|
|
|
while (!gst_shm_sink_can_render (self, GST_BUFFER_TIMESTAMP (buf))) {
|
|
g_cond_wait (&self->cond, GST_OBJECT_GET_LOCK (self));
|
|
if (self->unlock)
|
|
goto flushing;
|
|
}
|
|
|
|
|
|
if (gst_buffer_n_memory (buf) > 1) {
|
|
GST_LOG_OBJECT (self, "Buffer %p has %d GstMemory, we only support a single"
|
|
" one, need to do a memcpy", buf, gst_buffer_n_memory (buf));
|
|
need_new_memory = TRUE;
|
|
} else {
|
|
memory = gst_buffer_peek_memory (buf, 0);
|
|
|
|
if (memory->allocator != GST_ALLOCATOR (self->allocator)) {
|
|
need_new_memory = TRUE;
|
|
GST_LOG_OBJECT (self, "Memory in buffer %p was not allocated by "
|
|
"%" GST_PTR_FORMAT ", will memcpy", buf, memory->allocator);
|
|
}
|
|
}
|
|
|
|
if (need_new_memory) {
|
|
if (gst_buffer_get_size (buf) > sp_writer_get_max_buf_size (self->pipe)) {
|
|
gsize area_size = sp_writer_get_max_buf_size (self->pipe);
|
|
GST_OBJECT_UNLOCK (self);
|
|
GST_ELEMENT_ERROR (self, RESOURCE, NO_SPACE_LEFT,
|
|
("Shared memory area is too small"),
|
|
("Shared memory area of size %" G_GSIZE_FORMAT " is smaller than"
|
|
"buffer of size %" G_GSIZE_FORMAT, area_size,
|
|
gst_buffer_get_size (buf)));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
while ((memory =
|
|
gst_shm_sink_allocator_alloc_locked (self->allocator,
|
|
gst_buffer_get_size (buf), &self->params)) == NULL) {
|
|
g_cond_wait (&self->cond, GST_OBJECT_GET_LOCK (self));
|
|
if (self->unlock)
|
|
goto flushing;
|
|
}
|
|
|
|
while (self->wait_for_connection && !self->clients) {
|
|
g_cond_wait (&self->cond, GST_OBJECT_GET_LOCK (self));
|
|
if (self->unlock) {
|
|
gst_memory_unref (memory);
|
|
GST_OBJECT_UNLOCK (self);
|
|
return GST_FLOW_FLUSHING;
|
|
}
|
|
}
|
|
|
|
gst_memory_map (memory, &map, GST_MAP_WRITE);
|
|
gst_buffer_extract (buf, 0, map.data, map.size);
|
|
gst_memory_unmap (memory, &map);
|
|
|
|
sendbuf = gst_buffer_new ();
|
|
gst_buffer_copy_into (sendbuf, buf, GST_BUFFER_COPY_METADATA, 0, -1);
|
|
gst_buffer_append_memory (sendbuf, memory);
|
|
} else {
|
|
sendbuf = gst_buffer_ref (buf);
|
|
}
|
|
|
|
gst_buffer_map (sendbuf, &map, GST_MAP_READ);
|
|
/* Make the memory readonly as of now as we've sent it to the other side
|
|
* We know it's not mapped for writing anywhere as we just mapped it for
|
|
* reading
|
|
*/
|
|
|
|
rv = sp_writer_send_buf (self->pipe, (char *) map.data, map.size, sendbuf);
|
|
|
|
gst_buffer_unmap (sendbuf, &map);
|
|
|
|
GST_OBJECT_UNLOCK (self);
|
|
|
|
if (rv == 0) {
|
|
GST_DEBUG_OBJECT (self, "No clients connected, unreffing buffer");
|
|
gst_buffer_unref (sendbuf);
|
|
} else if (rv == -1) {
|
|
GST_ELEMENT_ERROR (self, STREAM, FAILED, ("Invalid allocated buffer"),
|
|
("The shmpipe library rejects our buffer, this is a bug"));
|
|
ret = GST_FLOW_ERROR;
|
|
}
|
|
|
|
/* If we allocated our own memory, then unmap it */
|
|
|
|
return ret;
|
|
|
|
flushing:
|
|
GST_OBJECT_UNLOCK (self);
|
|
return GST_FLOW_FLUSHING;
|
|
}
|
|
|
|
static void
|
|
free_buffer_locked (GstBuffer * buffer, void *data)
|
|
{
|
|
GSList **list = data;
|
|
|
|
g_assert (buffer != NULL);
|
|
|
|
*list = g_slist_prepend (*list, buffer);
|
|
}
|
|
|
|
static gpointer
|
|
pollthread_func (gpointer data)
|
|
{
|
|
GstShmSink *self = GST_SHM_SINK (data);
|
|
GList *item;
|
|
GstClockTime timeout = GST_CLOCK_TIME_NONE;
|
|
|
|
while (!self->stop) {
|
|
|
|
if (gst_poll_wait (self->poll, timeout) < 0)
|
|
return NULL;
|
|
|
|
timeout = GST_CLOCK_TIME_NONE;
|
|
|
|
if (self->stop)
|
|
return NULL;
|
|
|
|
if (gst_poll_fd_has_closed (self->poll, &self->serverpollfd)) {
|
|
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. */
|
|
timeout = 0;
|
|
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;
|
|
gpointer tag = NULL;
|
|
|
|
GST_OBJECT_LOCK (self);
|
|
rv = sp_writer_recv (self->pipe, gclient->client, &tag);
|
|
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;
|
|
}
|
|
|
|
g_assert (rv == 0 || tag == NULL);
|
|
|
|
if (rv == 0)
|
|
gst_buffer_unref (tag);
|
|
}
|
|
continue;
|
|
close_client:
|
|
{
|
|
GSList *list = NULL;
|
|
GST_OBJECT_LOCK (self);
|
|
sp_writer_close_client (self->pipe, gclient->client,
|
|
(sp_buffer_free_callback) free_buffer_locked, (void **) &list);
|
|
GST_OBJECT_UNLOCK (self);
|
|
g_slist_free_full (list, (GDestroyNotify) gst_buffer_unref);
|
|
}
|
|
|
|
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 GST_BASE_SINK_CLASS (parent_class)->event (bsink, event);
|
|
}
|
|
|
|
|
|
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;
|
|
}
|
|
|
|
static gboolean
|
|
gst_shm_sink_propose_allocation (GstBaseSink * sink, GstQuery * query)
|
|
{
|
|
GstShmSink *self = GST_SHM_SINK (sink);
|
|
|
|
if (self->allocator)
|
|
gst_query_add_allocation_param (query, GST_ALLOCATOR (self->allocator),
|
|
NULL);
|
|
|
|
return TRUE;
|
|
}
|