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gstreamer/gst/tcp/gstmultihandlesink.c
Jan Alexander Steffens (heftig) c272a5e1a5 multihandlesink: Don't pass NULL caps to gst_caps_is_equal 
Apparently the sinkpad caps can get cleared when shutting down the
pipeline while the sink is working, provoking a critical warning.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/842>
2020-10-08 21:55:38 +00:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2004> Thomas Vander Stichele <thomas at apestaart dot org>
* Copyright (C) 2006 Wim Taymans <wim at fluendo dot com>
* Copyright (C) <2011> Collabora Ltd.
* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst-i18n-plugin.h>
#include "gstmultihandlesink.h"
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifndef G_OS_WIN32
#include <netinet/in.h>
#endif
#include <string.h>
#define NOT_IMPLEMENTED 0
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC (multihandlesink_debug);
#define GST_CAT_DEFAULT (multihandlesink_debug)
/* MultiHandleSink signals and args */
enum
{
GST_MULTI_SINK_LAST_SIGNAL,
/* methods */
SIGNAL_ADD,
SIGNAL_ADD_BURST,
SIGNAL_CLEAR,
/* signals */
SIGNAL_CLIENT_ADDED,
SIGNAL_CLIENT_REMOVED,
SIGNAL_CLIENT_SOCKET_REMOVED,
LAST_SIGNAL
};
/* this is really arbitrarily chosen */
#define DEFAULT_BUFFERS_MAX -1
#define DEFAULT_BUFFERS_SOFT_MAX -1
#define DEFAULT_TIME_MIN -1
#define DEFAULT_BYTES_MIN -1
#define DEFAULT_BUFFERS_MIN -1
#define DEFAULT_UNIT_FORMAT GST_FORMAT_BUFFERS
#define DEFAULT_UNITS_MAX -1
#define DEFAULT_UNITS_SOFT_MAX -1
#define DEFAULT_RECOVER_POLICY GST_RECOVER_POLICY_NONE
#define DEFAULT_TIMEOUT 0
#define DEFAULT_SYNC_METHOD GST_SYNC_METHOD_LATEST
#define DEFAULT_BURST_FORMAT GST_FORMAT_UNDEFINED
#define DEFAULT_BURST_VALUE 0
#define DEFAULT_QOS_DSCP -1
#define DEFAULT_RESEND_STREAMHEADER TRUE
enum
{
PROP_0,
PROP_BUFFERS_QUEUED,
PROP_BYTES_QUEUED,
PROP_TIME_QUEUED,
PROP_UNIT_FORMAT,
PROP_UNITS_MAX,
PROP_UNITS_SOFT_MAX,
PROP_BUFFERS_MAX,
PROP_BUFFERS_SOFT_MAX,
PROP_TIME_MIN,
PROP_BYTES_MIN,
PROP_BUFFERS_MIN,
PROP_RECOVER_POLICY,
PROP_TIMEOUT,
PROP_SYNC_METHOD,
PROP_BYTES_TO_SERVE,
PROP_BYTES_SERVED,
PROP_BURST_FORMAT,
PROP_BURST_VALUE,
PROP_QOS_DSCP,
PROP_RESEND_STREAMHEADER,
PROP_NUM_HANDLES
};
GType
gst_multi_handle_sink_recover_policy_get_type (void)
{
static GType recover_policy_type = 0;
static const GEnumValue recover_policy[] = {
{GST_RECOVER_POLICY_NONE,
"Do not try to recover", "none"},
{GST_RECOVER_POLICY_RESYNC_LATEST,
"Resync client to latest buffer", "latest"},
{GST_RECOVER_POLICY_RESYNC_SOFT_LIMIT,
"Resync client to soft limit", "soft-limit"},
{GST_RECOVER_POLICY_RESYNC_KEYFRAME,
"Resync client to most recent keyframe", "keyframe"},
{0, NULL, NULL},
};
if (!recover_policy_type) {
recover_policy_type =
g_enum_register_static ("GstMultiHandleSinkRecoverPolicy",
recover_policy);
}
return recover_policy_type;
}
GType
gst_multi_handle_sink_sync_method_get_type (void)
{
static GType sync_method_type = 0;
static const GEnumValue sync_method[] = {
{GST_SYNC_METHOD_LATEST,
"Serve starting from the latest buffer", "latest"},
{GST_SYNC_METHOD_NEXT_KEYFRAME,
"Serve starting from the next keyframe", "next-keyframe"},
{GST_SYNC_METHOD_LATEST_KEYFRAME,
"Serve everything since the latest keyframe (burst)",
"latest-keyframe"},
{GST_SYNC_METHOD_BURST, "Serve burst-value data to client", "burst"},
{GST_SYNC_METHOD_BURST_KEYFRAME,
"Serve burst-value data starting on a keyframe",
"burst-keyframe"},
{GST_SYNC_METHOD_BURST_WITH_KEYFRAME,
"Serve burst-value data preferably starting on a keyframe",
"burst-with-keyframe"},
{0, NULL, NULL},
};
if (!sync_method_type) {
sync_method_type =
g_enum_register_static ("GstMultiHandleSinkSyncMethod", sync_method);
}
return sync_method_type;
}
GType
gst_multi_handle_sink_client_status_get_type (void)
{
static GType client_status_type = 0;
static const GEnumValue client_status[] = {
{GST_CLIENT_STATUS_OK, "ok", "ok"},
{GST_CLIENT_STATUS_CLOSED, "Closed", "closed"},
{GST_CLIENT_STATUS_REMOVED, "Removed", "removed"},
{GST_CLIENT_STATUS_SLOW, "Too slow", "slow"},
{GST_CLIENT_STATUS_ERROR, "Error", "error"},
{GST_CLIENT_STATUS_DUPLICATE, "Duplicate", "duplicate"},
{GST_CLIENT_STATUS_FLUSHING, "Flushing", "flushing"},
{0, NULL, NULL},
};
if (!client_status_type) {
client_status_type =
g_enum_register_static ("GstMultiHandleSinkClientStatus",
client_status);
}
return client_status_type;
}
static void gst_multi_handle_sink_finalize (GObject * object);
static void gst_multi_handle_sink_clear (GstMultiHandleSink * mhsink);
static GstFlowReturn gst_multi_handle_sink_render (GstBaseSink * bsink,
GstBuffer * buf);
static void gst_multi_handle_sink_queue_buffer (GstMultiHandleSink * mhsink,
GstBuffer * buffer);
static gboolean gst_multi_handle_sink_client_queue_buffer (GstMultiHandleSink *
mhsink, GstMultiHandleClient * mhclient, GstBuffer * buffer);
static GstStateChangeReturn gst_multi_handle_sink_change_state (GstElement *
element, GstStateChange transition);
static void gst_multi_handle_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_multi_handle_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
#define gst_multi_handle_sink_parent_class parent_class
G_DEFINE_TYPE (GstMultiHandleSink, gst_multi_handle_sink, GST_TYPE_BASE_SINK);
static guint gst_multi_handle_sink_signals[LAST_SIGNAL] = { 0 };
static gint
find_syncframe (GstMultiHandleSink * sink, gint idx, gint direction);
#define find_next_syncframe(s,i) find_syncframe(s,i,1)
#define find_prev_syncframe(s,i) find_syncframe(s,i,-1)
static gboolean is_sync_frame (GstMultiHandleSink * sink, GstBuffer * buffer);
static gboolean gst_multi_handle_sink_stop (GstBaseSink * bsink);
static gboolean gst_multi_handle_sink_start (GstBaseSink * bsink);
static gint get_buffers_max (GstMultiHandleSink * sink, gint64 max);
static gint
gst_multi_handle_sink_recover_client (GstMultiHandleSink * sink,
GstMultiHandleClient * client);
static void gst_multi_handle_sink_setup_dscp (GstMultiHandleSink * mhsink);
static gboolean
find_limits (GstMultiHandleSink * sink,
gint * min_idx, gint bytes_min, gint buffers_min, gint64 time_min,
gint * max_idx, gint bytes_max, gint buffers_max, gint64 time_max);
static void
gst_multi_handle_sink_class_init (GstMultiHandleSinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseSinkClass *gstbasesink_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
gobject_class->set_property = gst_multi_handle_sink_set_property;
gobject_class->get_property = gst_multi_handle_sink_get_property;
gobject_class->finalize = gst_multi_handle_sink_finalize;
g_object_class_install_property (gobject_class, PROP_BUFFERS_MAX,
g_param_spec_int ("buffers-max", "Buffers max",
"max number of buffers to queue for a client (-1 = no limit)", -1,
G_MAXINT, DEFAULT_BUFFERS_MAX,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BUFFERS_SOFT_MAX,
g_param_spec_int ("buffers-soft-max", "Buffers soft max",
"Recover client when going over this limit (-1 = no limit)", -1,
G_MAXINT, DEFAULT_BUFFERS_SOFT_MAX,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BYTES_MIN,
g_param_spec_int ("bytes-min", "Bytes min",
"min number of bytes to queue (-1 = as little as possible)", -1,
G_MAXINT, DEFAULT_BYTES_MIN,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TIME_MIN,
g_param_spec_int64 ("time-min", "Time min",
"min amount of time to queue (in nanoseconds) "
"(-1 = as little as possible)", -1, G_MAXINT64, DEFAULT_TIME_MIN,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BUFFERS_MIN,
g_param_spec_int ("buffers-min", "Buffers min",
"min number of buffers to queue (-1 = as few as possible)", -1,
G_MAXINT, DEFAULT_BUFFERS_MIN,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_UNIT_FORMAT,
g_param_spec_enum ("unit-format", "Units format",
"The unit to measure the max/soft-max/queued properties",
GST_TYPE_FORMAT, DEFAULT_UNIT_FORMAT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_UNITS_MAX,
g_param_spec_int64 ("units-max", "Units max",
"max number of units to queue (-1 = no limit)", -1, G_MAXINT64,
DEFAULT_UNITS_MAX, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_UNITS_SOFT_MAX,
g_param_spec_int64 ("units-soft-max", "Units soft max",
"Recover client when going over this limit (-1 = no limit)", -1,
G_MAXINT64, DEFAULT_UNITS_SOFT_MAX,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BUFFERS_QUEUED,
g_param_spec_uint ("buffers-queued", "Buffers queued",
"Number of buffers currently queued", 0, G_MAXUINT, 0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
#if NOT_IMPLEMENTED
g_object_class_install_property (gobject_class, PROP_BYTES_QUEUED,
g_param_spec_uint ("bytes-queued", "Bytes queued",
"Number of bytes currently queued", 0, G_MAXUINT, 0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TIME_QUEUED,
g_param_spec_uint64 ("time-queued", "Time queued",
"Amount of time currently queued (in nanoseconds)", 0, G_MAXUINT64, 0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
#endif
g_object_class_install_property (gobject_class, PROP_RECOVER_POLICY,
g_param_spec_enum ("recover-policy", "Recover Policy",
"How to recover when client reaches the soft max",
GST_TYPE_RECOVER_POLICY, DEFAULT_RECOVER_POLICY,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TIMEOUT,
g_param_spec_uint64 ("timeout", "Timeout",
"Maximum inactivity timeout in nanoseconds for a client (0 = no limit)",
0, G_MAXUINT64, DEFAULT_TIMEOUT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SYNC_METHOD,
g_param_spec_enum ("sync-method", "Sync Method",
"How to sync new clients to the stream", GST_TYPE_SYNC_METHOD,
DEFAULT_SYNC_METHOD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BYTES_TO_SERVE,
g_param_spec_uint64 ("bytes-to-serve", "Bytes to serve",
"Number of bytes received to serve to clients", 0, G_MAXUINT64, 0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BYTES_SERVED,
g_param_spec_uint64 ("bytes-served", "Bytes served",
"Total number of bytes send to all clients", 0, G_MAXUINT64, 0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BURST_FORMAT,
g_param_spec_enum ("burst-format", "Burst format",
"The format of the burst units (when sync-method is burst[[-with]-keyframe])",
GST_TYPE_FORMAT, DEFAULT_BURST_FORMAT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BURST_VALUE,
g_param_spec_uint64 ("burst-value", "Burst value",
"The amount of burst expressed in burst-format", 0, G_MAXUINT64,
DEFAULT_BURST_VALUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_QOS_DSCP,
g_param_spec_int ("qos-dscp", "QoS diff srv code point",
"Quality of Service, differentiated services code point (-1 default)",
-1, 63, DEFAULT_QOS_DSCP,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstMultiHandleSink::resend-streamheader
*
* Resend the streamheaders to existing clients when they change.
*/
g_object_class_install_property (gobject_class, PROP_RESEND_STREAMHEADER,
g_param_spec_boolean ("resend-streamheader", "Resend streamheader",
"Resend the streamheader if it changes in the caps",
DEFAULT_RESEND_STREAMHEADER,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_NUM_HANDLES,
g_param_spec_uint ("num-handles", "Number of handles",
"The current number of client handles",
0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* GstMultiHandleSink::clear:
* @gstmultihandlesink: the multihandlesink element to emit this signal on
*
* Remove all sockets from multihandlesink. Since multihandlesink did not
* open sockets itself, it does not explicitly close the sockets. The application
* should do so by connecting to the client-socket-removed callback.
*/
gst_multi_handle_sink_signals[SIGNAL_CLEAR] =
g_signal_new ("clear", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstMultiHandleSinkClass, clear), NULL, NULL,
NULL, G_TYPE_NONE, 0);
gst_element_class_add_static_pad_template (gstelement_class, &sinktemplate);
gst_element_class_set_static_metadata (gstelement_class,
"Multi socket sink", "Sink/Network",
"Send data to multiple sockets",
"Thomas Vander Stichele <thomas at apestaart dot org>, "
"Wim Taymans <wim@fluendo.com>, "
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_multi_handle_sink_change_state);
gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_render);
klass->client_queue_buffer =
GST_DEBUG_FUNCPTR (gst_multi_handle_sink_client_queue_buffer);
#if 0
klass->add = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_add);
klass->add_full = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_add_full);
klass->remove = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_remove);
klass->remove_flush = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_remove_flush);
#endif
klass->clear = GST_DEBUG_FUNCPTR (gst_multi_handle_sink_clear);
GST_DEBUG_CATEGORY_INIT (multihandlesink_debug, "multihandlesink", 0,
"Multi socket sink");
gst_type_mark_as_plugin_api (GST_TYPE_RECOVER_POLICY, 0);
gst_type_mark_as_plugin_api (GST_TYPE_SYNC_METHOD, 0);
gst_type_mark_as_plugin_api (GST_TYPE_CLIENT_STATUS, 0);
gst_type_mark_as_plugin_api (GST_TYPE_MULTI_HANDLE_SINK, 0);
}
static void
gst_multi_handle_sink_init (GstMultiHandleSink * this)
{
GST_OBJECT_FLAG_UNSET (this, GST_MULTI_HANDLE_SINK_OPEN);
CLIENTS_LOCK_INIT (this);
this->clients = NULL;
this->bufqueue = g_array_new (FALSE, TRUE, sizeof (GstBuffer *));
this->unit_format = DEFAULT_UNIT_FORMAT;
this->units_max = DEFAULT_UNITS_MAX;
this->units_soft_max = DEFAULT_UNITS_SOFT_MAX;
this->time_min = DEFAULT_TIME_MIN;
this->bytes_min = DEFAULT_BYTES_MIN;
this->buffers_min = DEFAULT_BUFFERS_MIN;
this->recover_policy = DEFAULT_RECOVER_POLICY;
this->timeout = DEFAULT_TIMEOUT;
this->def_sync_method = DEFAULT_SYNC_METHOD;
this->def_burst_format = DEFAULT_BURST_FORMAT;
this->def_burst_value = DEFAULT_BURST_VALUE;
this->qos_dscp = DEFAULT_QOS_DSCP;
this->resend_streamheader = DEFAULT_RESEND_STREAMHEADER;
}
static void
gst_multi_handle_sink_finalize (GObject * object)
{
GstMultiHandleSink *this;
this = GST_MULTI_HANDLE_SINK (object);
CLIENTS_LOCK_CLEAR (this);
g_array_free (this->bufqueue, TRUE);
g_hash_table_destroy (this->handle_hash);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
gint
gst_multi_handle_sink_setup_dscp_client (GstMultiHandleSink * sink,
GstMultiHandleClient * client)
{
#if !defined(IP_TOS) || !defined(HAVE_SYS_SOCKET_H)
return 0;
#else
gint tos;
gint ret;
int fd;
union gst_sockaddr
{
struct sockaddr sa;
struct sockaddr_in6 sa_in6;
struct sockaddr_storage sa_stor;
} sa;
socklen_t slen = sizeof (sa);
gint af;
GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (sink);
/* don't touch */
if (sink->qos_dscp < 0)
return 0;
fd = mhsinkclass->client_get_fd (client);
if ((ret = getsockname (fd, &sa.sa, &slen)) < 0) {
GST_DEBUG_OBJECT (sink, "could not get sockname: %s", g_strerror (errno));
return ret;
}
af = sa.sa.sa_family;
/* if this is an IPv4-mapped address then do IPv4 QoS */
if (af == AF_INET6) {
GST_DEBUG_OBJECT (sink, "check IP6 socket");
if (IN6_IS_ADDR_V4MAPPED (&(sa.sa_in6.sin6_addr))) {
GST_DEBUG_OBJECT (sink, "mapped to IPV4");
af = AF_INET;
}
}
/* extract and shift 6 bits of the DSCP */
tos = (sink->qos_dscp & 0x3f) << 2;
switch (af) {
case AF_INET:
ret = setsockopt (fd, IPPROTO_IP, IP_TOS, &tos, sizeof (tos));
break;
case AF_INET6:
#ifdef IPV6_TCLASS
ret = setsockopt (fd, IPPROTO_IPV6, IPV6_TCLASS, &tos, sizeof (tos));
break;
#endif
default:
ret = 0;
GST_ERROR_OBJECT (sink, "unsupported AF");
break;
}
if (ret)
GST_DEBUG_OBJECT (sink, "could not set DSCP: %s", g_strerror (errno));
return ret;
#endif
}
void
gst_multi_handle_sink_client_init (GstMultiHandleClient * client,
GstSyncMethod sync_method)
{
client->status = GST_CLIENT_STATUS_OK;
client->bufpos = -1;
client->flushcount = -1;
client->bufoffset = 0;
client->sending = NULL;
client->bytes_sent = 0;
client->dropped_buffers = 0;
client->avg_queue_size = 0;
client->first_buffer_ts = GST_CLOCK_TIME_NONE;
client->last_buffer_ts = GST_CLOCK_TIME_NONE;
client->new_connection = TRUE;
client->sync_method = sync_method;
client->currently_removing = FALSE;
/* update start time */
client->connect_time = g_get_real_time () * GST_USECOND;
client->disconnect_time = 0;
/* set last activity time to connect time */
client->last_activity_time = client->connect_time;
}
static void
gst_multi_handle_sink_setup_dscp (GstMultiHandleSink * mhsink)
{
GList *clients;
CLIENTS_LOCK (mhsink);
for (clients = mhsink->clients; clients; clients = clients->next) {
GstMultiHandleClient *client;
client = clients->data;
gst_multi_handle_sink_setup_dscp_client (mhsink, client);
}
CLIENTS_UNLOCK (mhsink);
}
void
gst_multi_handle_sink_add_full (GstMultiHandleSink * sink,
GstMultiSinkHandle handle, GstSyncMethod sync_method, GstFormat min_format,
guint64 min_value, GstFormat max_format, guint64 max_value)
{
GstMultiHandleClient *mhclient;
GList *clink;
GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (sink);
gchar debug[30];
GstMultiHandleSinkClass *mhsinkclass =
GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink);
if (!sink->running) {
g_warning ("Element %s must be set to READY, PAUSED or PLAYING state "
"before clients can be added", GST_OBJECT_NAME (sink));
return;
}
mhsinkclass->handle_debug (handle, debug);
GST_DEBUG_OBJECT (sink, "%s adding client, sync_method %d, "
"min_format %d, min_value %" G_GUINT64_FORMAT
", max_format %d, max_value %" G_GUINT64_FORMAT, debug,
sync_method, min_format, min_value, max_format, max_value);
/* do limits check if we can */
if (min_format == max_format) {
if (max_value != -1 && min_value != -1 && max_value < min_value)
goto wrong_limits;
}
CLIENTS_LOCK (sink);
/* check the hash to find a duplicate handle */
clink = g_hash_table_lookup (mhsink->handle_hash,
mhsinkclass->handle_hash_key (handle));
if (clink != NULL)
goto duplicate;
/* We do not take ownership of @handle in this function, but we can't take a
* reference directly as we don't know the concrete type of the handle.
* GstMultiHandleSink relies on the derived class to take a reference for us
* in new_client: */
mhclient = mhsinkclass->new_client (mhsink, handle, sync_method);
/* we can add the handle now */
clink = mhsink->clients = g_list_prepend (mhsink->clients, mhclient);
g_hash_table_insert (mhsink->handle_hash,
mhsinkclass->handle_hash_key (mhclient->handle), clink);
mhsink->clients_cookie++;
mhclient->burst_min_format = min_format;
mhclient->burst_min_value = min_value;
mhclient->burst_max_format = max_format;
mhclient->burst_max_value = max_value;
if (mhsinkclass->hash_changed)
mhsinkclass->hash_changed (mhsink);
CLIENTS_UNLOCK (sink);
mhsinkclass->emit_client_added (mhsink, handle);
return;
/* errors */
wrong_limits:
{
GST_WARNING_OBJECT (sink,
"%s wrong values min =%" G_GUINT64_FORMAT ", max=%"
G_GUINT64_FORMAT ", unit %d specified when adding client",
debug, min_value, max_value, min_format);
return;
}
duplicate:
{
CLIENTS_UNLOCK (sink);
GST_WARNING_OBJECT (sink, "%s duplicate client found, refusing", debug);
mhsinkclass->emit_client_removed (mhsink, handle,
GST_CLIENT_STATUS_DUPLICATE);
return;
}
}
/* "add" signal implementation */
void
gst_multi_handle_sink_add (GstMultiHandleSink * sink, GstMultiSinkHandle handle)
{
gst_multi_handle_sink_add_full (sink, handle, sink->def_sync_method,
sink->def_burst_format, sink->def_burst_value, sink->def_burst_format,
-1);
}
/* "remove" signal implementation */
void
gst_multi_handle_sink_remove (GstMultiHandleSink * sink,
GstMultiSinkHandle handle)
{
GList *clink;
GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (sink);
GstMultiHandleSinkClass *mhsinkclass =
GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink);
gchar debug[30];
mhsinkclass->handle_debug (handle, debug);
GST_DEBUG_OBJECT (sink, "%s removing client", debug);
CLIENTS_LOCK (sink);
clink = g_hash_table_lookup (mhsink->handle_hash,
mhsinkclass->handle_hash_key (handle));
if (clink != NULL) {
GstMultiHandleClient *mhclient = (GstMultiHandleClient *) clink->data;
if (mhclient->status != GST_CLIENT_STATUS_OK) {
GST_INFO_OBJECT (sink,
"%s Client already disconnecting with status %d",
debug, mhclient->status);
goto done;
}
mhclient->status = GST_CLIENT_STATUS_REMOVED;
gst_multi_handle_sink_remove_client_link (GST_MULTI_HANDLE_SINK (sink),
clink);
if (mhsinkclass->hash_changed)
mhsinkclass->hash_changed (mhsink);
} else {
GST_WARNING_OBJECT (sink, "%s no client with this handle found!", debug);
}
done:
CLIENTS_UNLOCK (sink);
}
/* "remove-flush" signal implementation */
void
gst_multi_handle_sink_remove_flush (GstMultiHandleSink * sink,
GstMultiSinkHandle handle)
{
GList *clink;
GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (sink);
GstMultiHandleSinkClass *mhsinkclass =
GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink);
gchar debug[30];
mhsinkclass->handle_debug (handle, debug);
GST_DEBUG_OBJECT (sink, "%s flushing client", debug);
CLIENTS_LOCK (sink);
clink = g_hash_table_lookup (mhsink->handle_hash,
mhsinkclass->handle_hash_key (handle));
if (clink != NULL) {
GstMultiHandleClient *mhclient = (GstMultiHandleClient *) clink->data;
if (mhclient->status != GST_CLIENT_STATUS_OK) {
GST_INFO_OBJECT (sink,
"%s Client already disconnecting with status %d",
mhclient->debug, mhclient->status);
goto done;
}
/* take the position of the client as the number of buffers left to flush.
* If the client was at position -1, we flush 0 buffers, 0 == flush 1
* buffer, etc... */
mhclient->flushcount = mhclient->bufpos + 1;
/* mark client as flushing. We can not remove the client right away because
* it might have some buffers to flush in the ->sending queue. */
mhclient->status = GST_CLIENT_STATUS_FLUSHING;
} else {
GST_WARNING_OBJECT (sink, "%s no client with this handle found!", debug);
}
done:
CLIENTS_UNLOCK (sink);
}
/* can be called both through the signal (i.e. from any thread) or when
* stopping, after the writing thread has shut down */
static void
gst_multi_handle_sink_clear (GstMultiHandleSink * mhsink)
{
GList *clients, *next;
guint32 cookie;
GstMultiHandleSinkClass *mhsinkclass =
GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink);
GST_DEBUG_OBJECT (mhsink, "clearing all clients");
CLIENTS_LOCK (mhsink);
restart:
cookie = mhsink->clients_cookie;
for (clients = mhsink->clients; clients; clients = next) {
GstMultiHandleClient *mhclient;
if (cookie != mhsink->clients_cookie) {
GST_DEBUG_OBJECT (mhsink, "cookie changed while removing all clients");
goto restart;
}
mhclient = (GstMultiHandleClient *) clients->data;
next = g_list_next (clients);
mhclient->status = GST_CLIENT_STATUS_REMOVED;
/* the next call changes the list, which is why we iterate
* with a temporary next pointer */
gst_multi_handle_sink_remove_client_link (mhsink, clients);
}
if (mhsinkclass->hash_changed)
mhsinkclass->hash_changed (mhsink);
CLIENTS_UNLOCK (mhsink);
}
/* "get-stats" signal implementation
*/
GstStructure *
gst_multi_handle_sink_get_stats (GstMultiHandleSink * sink,
GstMultiSinkHandle handle)
{
GstMultiHandleClient *client;
GstStructure *result = NULL;
GList *clink;
GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (sink);
GstMultiHandleSinkClass *mhsinkclass =
GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink);
gchar debug[30];
mhsinkclass->handle_debug (handle, debug);
CLIENTS_LOCK (sink);
clink = g_hash_table_lookup (mhsink->handle_hash,
mhsinkclass->handle_hash_key (handle));
if (clink == NULL)
goto noclient;
client = clink->data;
if (client != NULL) {
GstMultiHandleClient *mhclient = (GstMultiHandleClient *) client;
guint64 interval;
result = gst_structure_new_empty ("multihandlesink-stats");
if (mhclient->disconnect_time == 0) {
interval = (g_get_real_time () * GST_USECOND) - mhclient->connect_time;
} else {
interval = mhclient->disconnect_time - mhclient->connect_time;
}
gst_structure_set (result,
"bytes-sent", G_TYPE_UINT64, mhclient->bytes_sent,
"connect-time", G_TYPE_UINT64, mhclient->connect_time,
"disconnect-time", G_TYPE_UINT64, mhclient->disconnect_time,
"connect-duration", G_TYPE_UINT64, interval,
"last-activity-time", G_TYPE_UINT64, mhclient->last_activity_time,
"buffers-dropped", G_TYPE_UINT64, mhclient->dropped_buffers,
"first-buffer-ts", G_TYPE_UINT64, mhclient->first_buffer_ts,
"last-buffer-ts", G_TYPE_UINT64, mhclient->last_buffer_ts, NULL);
}
noclient:
CLIENTS_UNLOCK (sink);
/* python doesn't like a NULL pointer yet */
if (result == NULL) {
GST_WARNING_OBJECT (sink, "%s no client with this found!", debug);
result = gst_structure_new_empty ("multihandlesink-stats");
}
return result;
}
/* should be called with the clientslock held.
* Note that we don't close the fd as we didn't open it in the first
* place. An application should connect to the client-fd-removed signal and
* close the fd itself.
*/
void
gst_multi_handle_sink_remove_client_link (GstMultiHandleSink * sink,
GList * link)
{
GstMultiHandleClient *mhclient = (GstMultiHandleClient *) link->data;
GstMultiHandleSinkClass *mhsinkclass = GST_MULTI_HANDLE_SINK_GET_CLASS (sink);
if (mhclient->currently_removing) {
GST_WARNING_OBJECT (sink, "%s client is already being removed",
mhclient->debug);
return;
} else {
mhclient->currently_removing = TRUE;
}
/* FIXME: if we keep track of ip we can log it here and signal */
switch (mhclient->status) {
case GST_CLIENT_STATUS_OK:
GST_WARNING_OBJECT (sink, "%s removing client %p for no reason",
mhclient->debug, mhclient);
break;
case GST_CLIENT_STATUS_CLOSED:
GST_DEBUG_OBJECT (sink, "%s removing client %p because of close",
mhclient->debug, mhclient);
break;
case GST_CLIENT_STATUS_REMOVED:
GST_DEBUG_OBJECT (sink,
"%s removing client %p because the app removed it", mhclient->debug,
mhclient);
break;
case GST_CLIENT_STATUS_SLOW:
GST_INFO_OBJECT (sink,
"%s removing client %p because it was too slow", mhclient->debug,
mhclient);
break;
case GST_CLIENT_STATUS_ERROR:
GST_WARNING_OBJECT (sink,
"%s removing client %p because of error", mhclient->debug, mhclient);
break;
case GST_CLIENT_STATUS_FLUSHING:
default:
GST_WARNING_OBJECT (sink,
"%s removing client %p with invalid reason %d", mhclient->debug,
mhclient, mhclient->status);
break;
}
mhsinkclass->hash_removing (sink, mhclient);
mhclient->disconnect_time = g_get_real_time () * GST_USECOND;
/* free client buffers */
g_slist_foreach (mhclient->sending, (GFunc) gst_mini_object_unref, NULL);
g_slist_free (mhclient->sending);
mhclient->sending = NULL;
if (mhclient->caps)
gst_caps_unref (mhclient->caps);
mhclient->caps = NULL;
/* unlock the mutex before signaling because the signal handler
* might query some properties */
CLIENTS_UNLOCK (sink);
mhsinkclass->emit_client_removed (sink, mhclient->handle, mhclient->status);
/* lock again before we remove the client completely */
CLIENTS_LOCK (sink);
/* handle cannot be reused in the above signal callback so we can safely
* remove it from the hashtable here */
if (!g_hash_table_remove (sink->handle_hash,
mhsinkclass->handle_hash_key (mhclient->handle))) {
GST_WARNING_OBJECT (sink,
"%s error removing client %p from hash", mhclient->debug, mhclient);
}
/* after releasing the lock above, the link could be invalid, more
* precisely, the next and prev pointers could point to invalid list
* links. One optimisation could be to add a cookie to the linked list
* and take a shortcut when it did not change between unlocking and locking
* our mutex. For now we just walk the list again. */
sink->clients = g_list_remove (sink->clients, mhclient);
sink->clients_cookie++;
if (mhsinkclass->removed)
mhsinkclass->removed (sink, mhclient->handle);
CLIENTS_UNLOCK (sink);
/* sub-class must implement this to emit the client-$handle-removed signal */
g_assert (mhsinkclass->client_free != NULL);
/* and the handle is really gone now */
mhsinkclass->client_free (sink, mhclient);
g_free (mhclient);
CLIENTS_LOCK (sink);
}
static gboolean
gst_multi_handle_sink_client_queue_buffer (GstMultiHandleSink * mhsink,
GstMultiHandleClient * mhclient, GstBuffer * buffer)
{
GstMultiHandleSink *sink = GST_MULTI_HANDLE_SINK (mhsink);
GstCaps *caps;
/* TRUE: send them if the new caps have them */
gboolean send_streamheader = FALSE;
GstStructure *s;
/* before we queue the buffer, we check if we need to queue streamheader
* buffers (because it's a new client, or because they changed) */
caps = gst_pad_get_current_caps (GST_BASE_SINK_PAD (sink));
if (!mhclient->caps) {
if (caps) {
GST_DEBUG_OBJECT (sink,
"%s no previous caps for this client, send streamheader",
mhclient->debug);
send_streamheader = TRUE;
mhclient->caps = gst_caps_ref (caps);
}
} else {
/* there were previous caps recorded, so compare */
if (caps && !gst_caps_is_equal (caps, mhclient->caps)) {
const GValue *sh1, *sh2;
/* caps are not equal, but could still have the same streamheader */
s = gst_caps_get_structure (caps, 0);
if (!gst_structure_has_field (s, "streamheader")) {
/* no new streamheader, so nothing new to send */
GST_DEBUG_OBJECT (sink,
"%s new caps do not have streamheader, not sending",
mhclient->debug);
} else {
/* there is a new streamheader */
s = gst_caps_get_structure (mhclient->caps, 0);
if (!gst_structure_has_field (s, "streamheader")) {
/* no previous streamheader, so send the new one */
GST_DEBUG_OBJECT (sink,
"%s previous caps did not have streamheader, sending",
mhclient->debug);
send_streamheader = TRUE;
} else {
/* both old and new caps have streamheader set */
if (!mhsink->resend_streamheader) {
GST_DEBUG_OBJECT (sink,
"%s asked to not resend the streamheader, not sending",
mhclient->debug);
send_streamheader = FALSE;
} else {
sh1 = gst_structure_get_value (s, "streamheader");
s = gst_caps_get_structure (caps, 0);
sh2 = gst_structure_get_value (s, "streamheader");
if (gst_value_compare (sh1, sh2) != GST_VALUE_EQUAL) {
GST_DEBUG_OBJECT (sink,
"%s new streamheader different from old, sending",
mhclient->debug);
send_streamheader = TRUE;
}
}
}
}
}
/* Replace the old caps */
gst_caps_replace (&mhclient->caps, caps);
}
if (G_UNLIKELY (send_streamheader)) {
const GValue *sh;
GArray *buffers;
int i;
GST_LOG_OBJECT (sink,
"%s sending streamheader from caps %" GST_PTR_FORMAT,
mhclient->debug, caps);
s = gst_caps_get_structure (caps, 0);
if (!gst_structure_has_field (s, "streamheader")) {
GST_DEBUG_OBJECT (sink,
"%s no new streamheader, so nothing to send", mhclient->debug);
} else {
GST_LOG_OBJECT (sink,
"%s sending streamheader from caps %" GST_PTR_FORMAT,
mhclient->debug, caps);
sh = gst_structure_get_value (s, "streamheader");
g_assert (G_VALUE_TYPE (sh) == GST_TYPE_ARRAY);
buffers = g_value_peek_pointer (sh);
GST_DEBUG_OBJECT (sink, "%d streamheader buffers", buffers->len);
for (i = 0; i < buffers->len; ++i) {
GValue *bufval;
GstBuffer *buffer;
bufval = &g_array_index (buffers, GValue, i);
g_assert (G_VALUE_TYPE (bufval) == GST_TYPE_BUFFER);
buffer = g_value_peek_pointer (bufval);
GST_DEBUG_OBJECT (sink,
"%s queueing streamheader buffer of length %" G_GSIZE_FORMAT,
mhclient->debug, gst_buffer_get_size (buffer));
gst_buffer_ref (buffer);
mhclient->sending = g_slist_append (mhclient->sending, buffer);
}
}
}
if (caps)
gst_caps_unref (caps);
caps = NULL;
GST_LOG_OBJECT (sink, "%s queueing buffer of length %" G_GSIZE_FORMAT,
mhclient->debug, gst_buffer_get_size (buffer));
gst_buffer_ref (buffer);
mhclient->sending = g_slist_append (mhclient->sending, buffer);
return TRUE;
}
static gboolean
is_sync_frame (GstMultiHandleSink * sink, GstBuffer * buffer)
{
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT))
return FALSE;
return TRUE;
}
/* find the keyframe in the list of buffers starting the
* search from @idx. @direction as -1 will search backwards,
* 1 will search forwards.
* Returns: the index or -1 if there is no keyframe after idx.
*/
gint
find_syncframe (GstMultiHandleSink * sink, gint idx, gint direction)
{
gint i, len, result;
/* take length of queued buffers */
len = sink->bufqueue->len;
/* assume we don't find a keyframe */
result = -1;
/* then loop over all buffers to find the first keyframe */
for (i = idx; i >= 0 && i < len; i += direction) {
GstBuffer *buf;
buf = g_array_index (sink->bufqueue, GstBuffer *, i);
if (is_sync_frame (sink, buf)) {
GST_LOG_OBJECT (sink, "found keyframe at %d from %d, direction %d",
i, idx, direction);
result = i;
break;
}
}
return result;
}
/* Get the number of buffers from the buffer queue needed to satisfy
* the maximum max in the configured units.
* If units are not BUFFERS, and there are insufficient buffers in the
* queue to satisfy the limit, return len(queue) + 1 */
gint
get_buffers_max (GstMultiHandleSink * sink, gint64 max)
{
switch (sink->unit_format) {
case GST_FORMAT_BUFFERS:
return max;
case GST_FORMAT_TIME:
{
GstBuffer *buf;
int i;
int len;
gint64 diff;
GstClockTime first = GST_CLOCK_TIME_NONE;
len = sink->bufqueue->len;
for (i = 0; i < len; i++) {
buf = g_array_index (sink->bufqueue, GstBuffer *, i);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
if (first == -1)
first = GST_BUFFER_TIMESTAMP (buf);
diff = first - GST_BUFFER_TIMESTAMP (buf);
if (diff > max)
return i + 1;
}
}
return len + 1;
}
case GST_FORMAT_BYTES:
{
GstBuffer *buf;
int i;
int len;
gint acc = 0;
len = sink->bufqueue->len;
for (i = 0; i < len; i++) {
buf = g_array_index (sink->bufqueue, GstBuffer *, i);
acc += gst_buffer_get_size (buf);
if (acc > max)
return i + 1;
}
return len + 1;
}
default:
return max;
}
}
/* find the positions in the buffer queue where *_min and *_max
* is satisfied
*/
/* count the amount of data in the buffers and return the index
* that satisfies the given limits.
*
* Returns: index @idx in the buffer queue so that the given limits are
* satisfied. TRUE if all the limits could be satisfied, FALSE if not
* enough data was in the queue.
*
* FIXME, this code might now work if any of the units is in buffers...
*/
gboolean
find_limits (GstMultiHandleSink * sink,
gint * min_idx, gint bytes_min, gint buffers_min, gint64 time_min,
gint * max_idx, gint bytes_max, gint buffers_max, gint64 time_max)
{
GstClockTime first, time;
gint i, len, bytes;
gboolean result, max_hit;
/* take length of queue */
len = sink->bufqueue->len;
/* this must hold */
g_assert (len > 0);
GST_LOG_OBJECT (sink,
"bytes_min %d, buffers_min %d, time_min %" GST_TIME_FORMAT
", bytes_max %d, buffers_max %d, time_max %" GST_TIME_FORMAT, bytes_min,
buffers_min, GST_TIME_ARGS (time_min), bytes_max, buffers_max,
GST_TIME_ARGS (time_max));
/* do the trivial buffer limit test */
if (buffers_min != -1 && len < buffers_min) {
*min_idx = len - 1;
*max_idx = len - 1;
return FALSE;
}
result = FALSE;
/* else count bytes and time */
first = -1;
bytes = 0;
/* unset limits */
*min_idx = -1;
*max_idx = -1;
max_hit = FALSE;
i = 0;
/* loop through the buffers, when a limit is ok, mark it
* as -1, we have at least one buffer in the queue. */
do {
GstBuffer *buf;
/* if we checked all min limits, update result */
if (bytes_min == -1 && time_min == -1 && *min_idx == -1) {
/* don't go below 0 */
*min_idx = MAX (i - 1, 0);
}
/* if we reached one max limit break out */
if (max_hit) {
/* i > 0 when we get here, we subtract one to get the position
* of the previous buffer. */
*max_idx = i - 1;
/* we have valid complete result if we found a min_idx too */
result = *min_idx != -1;
break;
}
buf = g_array_index (sink->bufqueue, GstBuffer *, i);
bytes += gst_buffer_get_size (buf);
/* take timestamp and save for the base first timestamp */
if ((time = GST_BUFFER_TIMESTAMP (buf)) != -1) {
GST_LOG_OBJECT (sink, "Ts %" GST_TIME_FORMAT " on buffer",
GST_TIME_ARGS (time));
if (first == -1)
first = time;
/* increase max usage if we did not fill enough. Note that
* buffers are sorted from new to old, so the first timestamp is
* bigger than the next one. */
if (time_min != -1 && first - time >= time_min)
time_min = -1;
if (time_max != -1 && first - time >= time_max)
max_hit = TRUE;
} else {
GST_LOG_OBJECT (sink, "No timestamp on buffer");
}
/* time is OK or unknown, check and increase if not enough bytes */
if (bytes_min != -1) {
if (bytes >= bytes_min)
bytes_min = -1;
}
if (bytes_max != -1) {
if (bytes >= bytes_max) {
max_hit = TRUE;
}
}
i++;
}
while (i < len);
/* if we did not hit the max or min limit, set to buffer size */
if (*max_idx == -1)
*max_idx = len - 1;
/* make sure min does not exceed max */
if (*min_idx == -1)
*min_idx = *max_idx;
return result;
}
/* parse the unit/value pair and assign it to the result value of the
* right type, leave the other values untouched
*
* Returns: FALSE if the unit is unknown or undefined. TRUE otherwise.
*/
static gboolean
assign_value (GstFormat format, guint64 value, gint * bytes, gint * buffers,
GstClockTime * time)
{
gboolean res = TRUE;
/* set only the limit of the given format to the given value */
switch (format) {
case GST_FORMAT_BUFFERS:
*buffers = (gint) value;
break;
case GST_FORMAT_TIME:
*time = value;
break;
case GST_FORMAT_BYTES:
*bytes = (gint) value;
break;
case GST_FORMAT_UNDEFINED:
default:
res = FALSE;
break;
}
return res;
}
/* count the index in the buffer queue to satisfy the given unit
* and value pair starting from buffer at index 0.
*
* Returns: TRUE if there was enough data in the queue to satisfy the
* burst values. @idx contains the index in the buffer that contains enough
* data to satisfy the limits or the last buffer in the queue when the
* function returns FALSE.
*/
static gboolean
count_burst_unit (GstMultiHandleSink * sink, gint * min_idx,
GstFormat min_format, guint64 min_value, gint * max_idx,
GstFormat max_format, guint64 max_value)
{
gint bytes_min = -1, buffers_min = -1;
gint bytes_max = -1, buffers_max = -1;
GstClockTime time_min = GST_CLOCK_TIME_NONE, time_max = GST_CLOCK_TIME_NONE;
assign_value (min_format, min_value, &bytes_min, &buffers_min, &time_min);
assign_value (max_format, max_value, &bytes_max, &buffers_max, &time_max);
return find_limits (sink, min_idx, bytes_min, buffers_min, time_min,
max_idx, bytes_max, buffers_max, time_max);
}
/* decide where in the current buffer queue this new client should start
* receiving buffers from.
* This function is called whenever a client is connected and has not yet
* received a buffer.
* If this returns -1, it means that we haven't found a good point to
* start streaming from yet, and this function should be called again later
* when more buffers have arrived.
*/
gint
gst_multi_handle_sink_new_client_position (GstMultiHandleSink * sink,
GstMultiHandleClient * client)
{
gint result;
GST_DEBUG_OBJECT (sink,
"%s new client, deciding where to start in queue", client->debug);
GST_DEBUG_OBJECT (sink, "queue is currently %d buffers long",
sink->bufqueue->len);
switch (client->sync_method) {
case GST_SYNC_METHOD_LATEST:
/* no syncing, we are happy with whatever the client is going to get */
result = client->bufpos;
GST_DEBUG_OBJECT (sink,
"%s SYNC_METHOD_LATEST, position %d", client->debug, result);
break;
case GST_SYNC_METHOD_NEXT_KEYFRAME:
{
/* if one of the new buffers (between client->bufpos and 0) in the queue
* is a sync point, we can proceed, otherwise we need to keep waiting */
GST_LOG_OBJECT (sink,
"%s new client, bufpos %d, waiting for keyframe",
client->debug, client->bufpos);
result = find_prev_syncframe (sink, client->bufpos);
if (result != -1) {
GST_DEBUG_OBJECT (sink,
"%s SYNC_METHOD_NEXT_KEYFRAME: result %d", client->debug, result);
break;
}
/* client is not on a syncbuffer, need to skip these buffers and
* wait some more */
GST_LOG_OBJECT (sink,
"%s new client, skipping buffer(s), no syncpoint found",
client->debug);
client->bufpos = -1;
break;
}
case GST_SYNC_METHOD_LATEST_KEYFRAME:
{
GST_DEBUG_OBJECT (sink, "%s SYNC_METHOD_LATEST_KEYFRAME", client->debug);
/* for new clients we initially scan the complete buffer queue for
* a sync point when a buffer is added. If we don't find a keyframe,
* we need to wait for the next keyframe and so we change the client's
* sync method to GST_SYNC_METHOD_NEXT_KEYFRAME.
*/
result = find_next_syncframe (sink, 0);
if (result != -1) {
GST_DEBUG_OBJECT (sink,
"%s SYNC_METHOD_LATEST_KEYFRAME: result %d", client->debug, result);
break;
}
GST_DEBUG_OBJECT (sink,
"%s SYNC_METHOD_LATEST_KEYFRAME: no keyframe found, "
"switching to SYNC_METHOD_NEXT_KEYFRAME", client->debug);
/* throw client to the waiting state */
client->bufpos = -1;
/* and make client sync to next keyframe */
client->sync_method = GST_SYNC_METHOD_NEXT_KEYFRAME;
break;
}
case GST_SYNC_METHOD_BURST:
{
gboolean ok;
gint max;
/* move to the position where we satisfy the client's burst
* parameters. If we could not satisfy the parameters because there
* is not enough data, we just send what we have (which is in result).
* We use the max value to limit the search
*/
ok = count_burst_unit (sink, &result, client->burst_min_format,
client->burst_min_value, &max, client->burst_max_format,
client->burst_max_value);
GST_DEBUG_OBJECT (sink,
"%s SYNC_METHOD_BURST: burst_unit returned %d, result %d",
client->debug, ok, result);
GST_LOG_OBJECT (sink, "min %d, max %d", result, max);
/* we hit the max and it is below the min, use that then */
if (max != -1 && max <= result) {
result = MAX (max - 1, 0);
GST_DEBUG_OBJECT (sink,
"%s SYNC_METHOD_BURST: result above max, taken down to %d",
client->debug, result);
}
break;
}
case GST_SYNC_METHOD_BURST_KEYFRAME:
{
gint min_idx, max_idx;
gint next_syncframe, prev_syncframe;
/* BURST_KEYFRAME:
*
* _always_ start sending a keyframe to the client. We first search
* a keyframe between min/max limits. If there is none, we send it the
* last keyframe before min. If there is none, the behaviour is like
* NEXT_KEYFRAME.
*/
/* gather burst limits */
count_burst_unit (sink, &min_idx, client->burst_min_format,
client->burst_min_value, &max_idx, client->burst_max_format,
client->burst_max_value);
GST_LOG_OBJECT (sink, "min %d, max %d", min_idx, max_idx);
/* first find a keyframe after min_idx */
next_syncframe = find_next_syncframe (sink, min_idx);
if (next_syncframe != -1 && next_syncframe < max_idx) {
/* we have a valid keyframe and it's below the max */
GST_LOG_OBJECT (sink, "found keyframe in min/max limits");
result = next_syncframe;
break;
}
/* no valid keyframe, try to find one below min */
prev_syncframe = find_prev_syncframe (sink, min_idx);
if (prev_syncframe != -1) {
GST_WARNING_OBJECT (sink,
"using keyframe below min in BURST_KEYFRAME sync mode");
result = prev_syncframe;
break;
}
/* no prev keyframe or not enough data */
GST_WARNING_OBJECT (sink,
"no prev keyframe found in BURST_KEYFRAME sync mode, waiting for next");
/* throw client to the waiting state */
client->bufpos = -1;
/* and make client sync to next keyframe */
client->sync_method = GST_SYNC_METHOD_NEXT_KEYFRAME;
result = -1;
break;
}
case GST_SYNC_METHOD_BURST_WITH_KEYFRAME:
{
gint min_idx, max_idx;
gint next_syncframe;
/* BURST_WITH_KEYFRAME:
*
* try to start sending a keyframe to the client. We first search
* a keyframe between min/max limits. If there is none, we send it the
* amount of data up 'till min.
*/
/* gather enough data to burst */
count_burst_unit (sink, &min_idx, client->burst_min_format,
client->burst_min_value, &max_idx, client->burst_max_format,
client->burst_max_value);
GST_LOG_OBJECT (sink, "min %d, max %d", min_idx, max_idx);
/* first find a keyframe after min_idx */
next_syncframe = find_next_syncframe (sink, min_idx);
if (next_syncframe != -1 && next_syncframe < max_idx) {
/* we have a valid keyframe and it's below the max */
GST_LOG_OBJECT (sink, "found keyframe in min/max limits");
result = next_syncframe;
break;
}
/* no keyframe, send data from min_idx */
GST_WARNING_OBJECT (sink, "using min in BURST_WITH_KEYFRAME sync mode");
/* make sure we don't go over the max limit */
if (max_idx != -1 && max_idx <= min_idx) {
result = MAX (max_idx - 1, 0);
} else {
result = min_idx;
}
break;
}
default:
g_warning ("unknown sync method %d", client->sync_method);
result = client->bufpos;
break;
}
return result;
}
/* calculate the new position for a client after recovery. This function
* does not update the client position but merely returns the required
* position.
*/
gint
gst_multi_handle_sink_recover_client (GstMultiHandleSink * sink,
GstMultiHandleClient * client)
{
gint newbufpos;
GST_WARNING_OBJECT (sink,
"%s client %p is lagging at %d, recover using policy %d",
client->debug, client, client->bufpos, sink->recover_policy);
switch (sink->recover_policy) {
case GST_RECOVER_POLICY_NONE:
/* do nothing, client will catch up or get kicked out when it reaches
* the hard max */
newbufpos = client->bufpos;
break;
case GST_RECOVER_POLICY_RESYNC_LATEST:
/* move to beginning of queue */
newbufpos = -1;
break;
case GST_RECOVER_POLICY_RESYNC_SOFT_LIMIT:
/* move to beginning of soft max */
newbufpos = get_buffers_max (sink, sink->units_soft_max);
break;
case GST_RECOVER_POLICY_RESYNC_KEYFRAME:
/* find keyframe in buffers, we search backwards to find the
* closest keyframe relative to what this client already received. */
newbufpos = MIN (sink->bufqueue->len - 1,
get_buffers_max (sink, sink->units_soft_max) - 1);
while (newbufpos >= 0) {
GstBuffer *buf;
buf = g_array_index (sink->bufqueue, GstBuffer *, newbufpos);
if (is_sync_frame (sink, buf)) {
/* found a buffer that is not a delta unit */
break;
}
newbufpos--;
}
break;
default:
/* unknown recovery procedure */
newbufpos = get_buffers_max (sink, sink->units_soft_max);
break;
}
return newbufpos;
}
/* Queue a buffer on the global queue.
*
* This function adds the buffer to the front of a GArray. It removes the
* tail buffer if the max queue size is exceeded, unreffing the queued buffer.
* Note that unreffing the buffer is not a problem as clients who
* started writing out this buffer will still have a reference to it in the
* mhclient->sending queue.
*
* After adding the buffer, we update all client positions in the queue. If
* a client moves over the soft max, we start the recovery procedure for this
* slow client. If it goes over the hard max, it is put into the slow list
* and removed.
*
* Special care is taken of clients that were waiting for a new buffer (they
* had a position of -1) because they can proceed after adding this new buffer.
* This is done by adding the client back into the write fd_set and signaling
* the select thread that the fd_set changed.
*/
static void
gst_multi_handle_sink_queue_buffer (GstMultiHandleSink * mhsink,
GstBuffer * buffer)
{
GList *clients, *next;
gint queuelen;
gboolean hash_changed = FALSE;
gint max_buffer_usage;
gint i;
GstClockTime now;
gint max_buffers, soft_max_buffers;
guint cookie;
GstMultiHandleSink *sink = GST_MULTI_HANDLE_SINK (mhsink);
GstMultiHandleSinkClass *mhsinkclass =
GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink);
CLIENTS_LOCK (mhsink);
/* add buffer to queue */
g_array_prepend_val (mhsink->bufqueue, buffer);
queuelen = mhsink->bufqueue->len;
if (mhsink->units_max > 0)
max_buffers = get_buffers_max (mhsink, mhsink->units_max);
else
max_buffers = -1;
if (mhsink->units_soft_max > 0)
soft_max_buffers = get_buffers_max (mhsink, mhsink->units_soft_max);
else
soft_max_buffers = -1;
GST_LOG_OBJECT (sink, "Using max %d, softmax %d", max_buffers,
soft_max_buffers);
/* then loop over the clients and update the positions */
cookie = mhsink->clients_cookie;
for (clients = mhsink->clients; clients; clients = clients->next) {
GstMultiHandleClient *mhclient = clients->data;
mhclient->bufpos++;
GST_LOG_OBJECT (sink, "%s client %p at position %d",
mhclient->debug, mhclient, mhclient->bufpos);
/* check soft max if needed, recover client */
if (soft_max_buffers > 0 && mhclient->bufpos >= soft_max_buffers) {
gint newpos;
newpos = gst_multi_handle_sink_recover_client (mhsink, mhclient);
if (newpos != mhclient->bufpos) {
mhclient->dropped_buffers += mhclient->bufpos - newpos;
mhclient->bufpos = newpos;
mhclient->discont = TRUE;
GST_INFO_OBJECT (sink, "%s client %p position reset to %d",
mhclient->debug, mhclient, mhclient->bufpos);
} else {
GST_INFO_OBJECT (sink,
"%s client %p not recovering position", mhclient->debug, mhclient);
}
}
}
max_buffer_usage = 0;
now = g_get_real_time () * GST_USECOND;
/* now check for new or slow clients */
restart:
cookie = mhsink->clients_cookie;
for (clients = mhsink->clients; clients; clients = next) {
GstMultiHandleClient *mhclient = clients->data;
if (cookie != mhsink->clients_cookie) {
GST_DEBUG_OBJECT (sink, "Clients cookie outdated, restarting");
goto restart;
}
next = g_list_next (clients);
/* check hard max and timeout, remove client */
if ((max_buffers > 0 && mhclient->bufpos >= max_buffers) ||
(mhsink->timeout > 0
&& now - mhclient->last_activity_time > mhsink->timeout)) {
/* remove client */
GST_WARNING_OBJECT (sink, "%s client %p is too slow, removing",
mhclient->debug, mhclient);
/* remove the client, the handle set will be cleared and the select thread
* will be signaled */
mhclient->status = GST_CLIENT_STATUS_SLOW;
/* set client to invalid position while being removed */
mhclient->bufpos = -1;
gst_multi_handle_sink_remove_client_link (mhsink, clients);
hash_changed = TRUE;
continue;
} else if (mhclient->bufpos == 0 || mhclient->new_connection) {
/* can send data to this client now. need to signal the select thread that
* the handle_set changed */
mhsinkclass->hash_adding (mhsink, mhclient);
hash_changed = TRUE;
}
/* keep track of maximum buffer usage */
if (mhclient->bufpos > max_buffer_usage) {
max_buffer_usage = mhclient->bufpos;
}
}
/* make sure we respect bytes-min, buffers-min and time-min when they are set */
{
gint usage, max;
GST_LOG_OBJECT (sink,
"extending queue %d to respect time_min %" GST_TIME_FORMAT
", bytes_min %d, buffers_min %d", max_buffer_usage,
GST_TIME_ARGS (mhsink->time_min), mhsink->bytes_min,
mhsink->buffers_min);
/* get index where the limits are ok, we don't really care if all limits
* are ok, we just queue as much as we need. We also don't compare against
* the max limits. */
find_limits (mhsink, &usage, mhsink->bytes_min, mhsink->buffers_min,
mhsink->time_min, &max, -1, -1, -1);
max_buffer_usage = MAX (max_buffer_usage, usage);
GST_LOG_OBJECT (sink, "extended queue to %d", max_buffer_usage);
}
/* now look for sync points and make sure there is at least one
* sync point in the queue. We only do this if the LATEST_KEYFRAME or
* BURST_KEYFRAME mode is selected */
if (mhsink->def_sync_method == GST_SYNC_METHOD_LATEST_KEYFRAME ||
mhsink->def_sync_method == GST_SYNC_METHOD_BURST_KEYFRAME) {
/* no point in searching beyond the queue length */
gint limit = queuelen;
GstBuffer *buf;
/* no point in searching beyond the soft-max if any. */
if (soft_max_buffers > 0) {
limit = MIN (limit, soft_max_buffers);
}
GST_LOG_OBJECT (sink,
"extending queue to include sync point, now at %d, limit is %d",
max_buffer_usage, limit);
for (i = 0; i < limit; i++) {
buf = g_array_index (mhsink->bufqueue, GstBuffer *, i);
if (is_sync_frame (mhsink, buf)) {
/* found a sync frame, now extend the buffer usage to
* include at least this frame. */
max_buffer_usage = MAX (max_buffer_usage, i);
break;
}
}
GST_LOG_OBJECT (sink, "max buffer usage is now %d", max_buffer_usage);
}
GST_LOG_OBJECT (sink, "len %d, usage %d", queuelen, max_buffer_usage);
/* nobody is referencing units after max_buffer_usage so we can
* remove them from the queue. We remove them in reverse order as
* this is the most optimal for GArray. */
for (i = queuelen - 1; i > max_buffer_usage; i--) {
GstBuffer *old;
/* queue exceeded max size */
queuelen--;
old = g_array_index (mhsink->bufqueue, GstBuffer *, i);
mhsink->bufqueue = g_array_remove_index (mhsink->bufqueue, i);
/* unref tail buffer */
gst_buffer_unref (old);
}
/* save for stats */
mhsink->buffers_queued = max_buffer_usage + 1;
CLIENTS_UNLOCK (sink);
/* and send a signal to thread if handle_set changed */
if (hash_changed && mhsinkclass->hash_changed) {
mhsinkclass->hash_changed (mhsink);
}
}
static gboolean
buffer_is_in_caps (GstMultiHandleSink * sink, GstBuffer * buf)
{
GstCaps *caps;
GstStructure *s;
const GValue *v;
caps = gst_pad_get_current_caps (GST_BASE_SINK_PAD (sink));
if (!caps)
return FALSE;
s = gst_caps_get_structure (caps, 0);
if (!gst_structure_has_field (s, "streamheader")) {
gst_caps_unref (caps);
return FALSE;
}
v = gst_structure_get_value (s, "streamheader");
if (GST_VALUE_HOLDS_ARRAY (v)) {
guint n = gst_value_array_get_size (v);
guint i;
GstMapInfo map;
gst_buffer_map (buf, &map, GST_MAP_READ);
for (i = 0; i < n; i++) {
const GValue *v2 = gst_value_array_get_value (v, i);
GstBuffer *buf2;
GstMapInfo map2;
if (!GST_VALUE_HOLDS_BUFFER (v2))
continue;
buf2 = gst_value_get_buffer (v2);
if (buf == buf2) {
gst_caps_unref (caps);
return TRUE;
}
gst_buffer_map (buf2, &map2, GST_MAP_READ);
if (map.size == map2.size && memcmp (map.data, map2.data, map.size) == 0) {
gst_buffer_unmap (buf2, &map2);
gst_buffer_unmap (buf, &map);
gst_caps_unref (caps);
return TRUE;
}
gst_buffer_unmap (buf2, &map2);
}
gst_buffer_unmap (buf, &map);
}
gst_caps_unref (caps);
return FALSE;
}
static GstFlowReturn
gst_multi_handle_sink_render (GstBaseSink * bsink, GstBuffer * buf)
{
gboolean is_header, in_caps;
#if 0
GstCaps *bufcaps, *padcaps;
#endif
GstMultiHandleSink *sink = GST_MULTI_HANDLE_SINK (bsink);
g_return_val_if_fail (GST_OBJECT_FLAG_IS_SET (sink,
GST_MULTI_HANDLE_SINK_OPEN), GST_FLOW_FLUSHING);
#if 0
/* since we check every buffer for streamheader caps, we need to make
* sure every buffer has caps set */
bufcaps = gst_buffer_get_caps (buf);
padcaps = GST_PAD_CAPS (GST_BASE_SINK_PAD (bsink));
/* make sure we have caps on the pad */
if (!padcaps && !bufcaps)
goto no_caps;
#endif
/* get HEADER first, code below might mess with the flags */
is_header = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_HEADER);
in_caps = is_header && buffer_is_in_caps (sink, buf);
#if 0
/* stamp the buffer with previous caps if no caps set */
if (!bufcaps) {
if (!gst_buffer_is_writable (buf)) {
/* metadata is not writable, copy will be made and original buffer
* will be unreffed so we need to ref so that we don't lose the
* buffer in the render method. */
gst_buffer_ref (buf);
/* the new buffer is ours only, we keep it out of the scope of this
* function */
buf = gst_buffer_make_writable (buf);
} else {
/* else the metadata is writable, we ref because we keep the buffer
* out of the scope of this method */
gst_buffer_ref (buf);
}
/* buffer metadata is writable now, set the caps */
gst_buffer_set_caps (buf, padcaps);
} else {
gst_caps_unref (bufcaps);
/* since we keep this buffer out of the scope of this method */
gst_buffer_ref (buf);
}
#endif
gst_buffer_ref (buf);
GST_LOG_OBJECT (sink, "received buffer %p, in_caps: %s, offset %"
G_GINT64_FORMAT ", offset_end %" G_GINT64_FORMAT
", timestamp %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
buf, in_caps ? "yes" : "no", GST_BUFFER_OFFSET (buf),
GST_BUFFER_OFFSET_END (buf),
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
/* if the incoming buffer is a streamheader from the caps, then we assume for now
* it's a streamheader that needs to be sent to each new client.
*
* We don't send the buffer to the client, since streamheaders are sent
* separately when necessary. */
if (in_caps) {
GST_DEBUG_OBJECT (sink, "ignoring HEADER buffer with length %"
G_GSIZE_FORMAT, gst_buffer_get_size (buf));
gst_buffer_unref (buf);
} else {
/* queue the buffer, this is a regular data buffer. */
gst_multi_handle_sink_queue_buffer (sink, buf);
sink->bytes_to_serve += gst_buffer_get_size (buf);
}
return GST_FLOW_OK;
/* ERRORS */
#if 0
no_caps:
{
GST_ELEMENT_ERROR (sink, CORE, NEGOTIATION, (NULL),
("Received first buffer without caps set"));
return GST_FLOW_NOT_NEGOTIATED;
}
#endif
}
static void
gst_multi_handle_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMultiHandleSink *multihandlesink;
multihandlesink = GST_MULTI_HANDLE_SINK (object);
switch (prop_id) {
case PROP_BUFFERS_MAX:
multihandlesink->units_max = g_value_get_int (value);
break;
case PROP_BUFFERS_SOFT_MAX:
multihandlesink->units_soft_max = g_value_get_int (value);
break;
case PROP_TIME_MIN:
multihandlesink->time_min = g_value_get_int64 (value);
break;
case PROP_BYTES_MIN:
multihandlesink->bytes_min = g_value_get_int (value);
break;
case PROP_BUFFERS_MIN:
multihandlesink->buffers_min = g_value_get_int (value);
break;
case PROP_UNIT_FORMAT:
multihandlesink->unit_format = g_value_get_enum (value);
break;
case PROP_UNITS_MAX:
multihandlesink->units_max = g_value_get_int64 (value);
break;
case PROP_UNITS_SOFT_MAX:
multihandlesink->units_soft_max = g_value_get_int64 (value);
break;
case PROP_RECOVER_POLICY:
multihandlesink->recover_policy = g_value_get_enum (value);
break;
case PROP_TIMEOUT:
multihandlesink->timeout = g_value_get_uint64 (value);
break;
case PROP_SYNC_METHOD:
multihandlesink->def_sync_method = g_value_get_enum (value);
break;
case PROP_BURST_FORMAT:
multihandlesink->def_burst_format = g_value_get_enum (value);
break;
case PROP_BURST_VALUE:
multihandlesink->def_burst_value = g_value_get_uint64 (value);
break;
case PROP_QOS_DSCP:
multihandlesink->qos_dscp = g_value_get_int (value);
gst_multi_handle_sink_setup_dscp (multihandlesink);
break;
case PROP_RESEND_STREAMHEADER:
multihandlesink->resend_streamheader = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_multi_handle_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstMultiHandleSink *multihandlesink;
multihandlesink = GST_MULTI_HANDLE_SINK (object);
switch (prop_id) {
case PROP_BUFFERS_MAX:
g_value_set_int (value, multihandlesink->units_max);
break;
case PROP_BUFFERS_SOFT_MAX:
g_value_set_int (value, multihandlesink->units_soft_max);
break;
case PROP_TIME_MIN:
g_value_set_int64 (value, multihandlesink->time_min);
break;
case PROP_BYTES_MIN:
g_value_set_int (value, multihandlesink->bytes_min);
break;
case PROP_BUFFERS_MIN:
g_value_set_int (value, multihandlesink->buffers_min);
break;
case PROP_BUFFERS_QUEUED:
g_value_set_uint (value, multihandlesink->buffers_queued);
break;
case PROP_BYTES_QUEUED:
g_value_set_uint (value, multihandlesink->bytes_queued);
break;
case PROP_TIME_QUEUED:
g_value_set_uint64 (value, multihandlesink->time_queued);
break;
case PROP_UNIT_FORMAT:
g_value_set_enum (value, multihandlesink->unit_format);
break;
case PROP_UNITS_MAX:
g_value_set_int64 (value, multihandlesink->units_max);
break;
case PROP_UNITS_SOFT_MAX:
g_value_set_int64 (value, multihandlesink->units_soft_max);
break;
case PROP_RECOVER_POLICY:
g_value_set_enum (value, multihandlesink->recover_policy);
break;
case PROP_TIMEOUT:
g_value_set_uint64 (value, multihandlesink->timeout);
break;
case PROP_SYNC_METHOD:
g_value_set_enum (value, multihandlesink->def_sync_method);
break;
case PROP_BYTES_TO_SERVE:
g_value_set_uint64 (value, multihandlesink->bytes_to_serve);
break;
case PROP_BYTES_SERVED:
g_value_set_uint64 (value, multihandlesink->bytes_served);
break;
case PROP_BURST_FORMAT:
g_value_set_enum (value, multihandlesink->def_burst_format);
break;
case PROP_BURST_VALUE:
g_value_set_uint64 (value, multihandlesink->def_burst_value);
break;
case PROP_QOS_DSCP:
g_value_set_int (value, multihandlesink->qos_dscp);
break;
case PROP_RESEND_STREAMHEADER:
g_value_set_boolean (value, multihandlesink->resend_streamheader);
break;
case PROP_NUM_HANDLES:
g_value_set_uint (value,
g_hash_table_size (multihandlesink->handle_hash));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* create a socket for sending to remote machine */
static gboolean
gst_multi_handle_sink_start (GstBaseSink * bsink)
{
GstMultiHandleSinkClass *mhsclass;
GstMultiHandleSink *mhsink;
if (GST_OBJECT_FLAG_IS_SET (bsink, GST_MULTI_HANDLE_SINK_OPEN))
return TRUE;
mhsink = GST_MULTI_HANDLE_SINK (bsink);
mhsclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink);
if (!mhsclass->start_pre (mhsink))
return FALSE;
mhsink->bytes_to_serve = 0;
mhsink->bytes_served = 0;
if (mhsclass->init) {
mhsclass->init (mhsink);
}
mhsink->running = TRUE;
mhsink->thread = g_thread_new ("multihandlesink",
(GThreadFunc) mhsclass->thread, mhsink);
GST_OBJECT_FLAG_SET (bsink, GST_MULTI_HANDLE_SINK_OPEN);
return TRUE;
}
static gboolean
gst_multi_handle_sink_stop (GstBaseSink * bsink)
{
GstMultiHandleSinkClass *mhclass;
GstBuffer *buf;
gint i;
GstMultiHandleSink *mhsink = GST_MULTI_HANDLE_SINK (bsink);
mhclass = GST_MULTI_HANDLE_SINK_GET_CLASS (mhsink);
if (!GST_OBJECT_FLAG_IS_SET (bsink, GST_MULTI_HANDLE_SINK_OPEN))
return TRUE;
mhsink->running = FALSE;
mhclass->stop_pre (mhsink);
if (mhsink->thread) {
GST_DEBUG_OBJECT (mhsink, "joining thread");
g_thread_join (mhsink->thread);
GST_DEBUG_OBJECT (mhsink, "joined thread");
mhsink->thread = NULL;
}
/* free the clients */
mhclass->clear (GST_MULTI_HANDLE_SINK (mhsink));
if (mhclass->close)
mhclass->close (mhsink);
mhclass->stop_post (mhsink);
/* remove all queued buffers */
if (mhsink->bufqueue) {
GST_DEBUG_OBJECT (mhsink, "Emptying bufqueue with %d buffers",
mhsink->bufqueue->len);
for (i = mhsink->bufqueue->len - 1; i >= 0; --i) {
buf = g_array_index (mhsink->bufqueue, GstBuffer *, i);
GST_LOG_OBJECT (mhsink, "Removing buffer %p (%d) with refcount %d", buf,
i, GST_MINI_OBJECT_REFCOUNT (buf));
gst_buffer_unref (buf);
mhsink->bufqueue = g_array_remove_index (mhsink->bufqueue, i);
}
/* freeing the array is done in _finalize */
}
GST_OBJECT_FLAG_UNSET (mhsink, GST_MULTI_HANDLE_SINK_OPEN);
return TRUE;
}
static GstStateChangeReturn
gst_multi_handle_sink_change_state (GstElement * element,
GstStateChange transition)
{
GstMultiHandleSink *sink;
GstStateChangeReturn ret;
sink = GST_MULTI_HANDLE_SINK (element);
/* we disallow changing the state from the streaming thread */
if (g_thread_self () == sink->thread) {
g_warning
("\nTrying to change %s's state from its streaming thread would deadlock.\n"
"You cannot change the state of an element from its streaming\n"
"thread. Use g_idle_add() or post a GstMessage on the bus to\n"
"schedule the state change from the main thread.\n",
GST_ELEMENT_NAME (sink));
return GST_STATE_CHANGE_FAILURE;
}
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_multi_handle_sink_start (GST_BASE_SINK (sink)))
goto start_failed;
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_NULL:
gst_multi_handle_sink_stop (GST_BASE_SINK (sink));
break;
default:
break;
}
return ret;
/* ERRORS */
start_failed:
{
/* error message was posted */
return GST_STATE_CHANGE_FAILURE;
}
}
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