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DEFINITIONS
This source file includes following definitions.
- gst_tee_pull_mode_get_type
- gst_tee_base_init
- gst_tee_dispose
- gst_tee_finalize
- gst_tee_class_init
- gst_tee_init
- gst_tee_request_new_pad
- gst_tee_release_pad
- gst_tee_set_property
- gst_tee_get_property
- gst_tee_find_buffer_alloc
- gst_tee_buffer_alloc
- gst_tee_sink_acceptcaps
- gst_tee_do_message
- gst_tee_do_push
- clear_pads
- gst_tee_handle_data
- gst_tee_chain
- gst_tee_chain_list
- gst_tee_sink_activate_push
- gst_tee_src_activate_pull
- gst_tee_src_check_get_range
- gst_tee_push_eos
- gst_tee_pull_eos
- gst_tee_src_get_range
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000,2001,2002,2003,2004,2005 Wim Taymans <wim@fluendo.com>
* 2007 Wim Taymans <wim.taymans@gmail.com>
*
* gsttee.c: Tee element, one in N out
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-tee
* @see_also: #GstIdentity
*
* Split data to multiple pads.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gsttee.h"
#include <string.h>
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC (gst_tee_debug);
#define GST_CAT_DEFAULT gst_tee_debug
#define GST_TYPE_TEE_PULL_MODE (gst_tee_pull_mode_get_type())
static GType
gst_tee_pull_mode_get_type (void)
{
static GType type = 0;
static const GEnumValue data[] = {
{GST_TEE_PULL_MODE_NEVER, "Never activate in pull mode", "never"},
{GST_TEE_PULL_MODE_SINGLE, "Only one src pad can be active in pull mode",
"single"},
{0, NULL, NULL},
};
if (!type) {
type = g_enum_register_static ("GstTeePullMode", data);
}
return type;
}
/* lock to protect request pads from being removed while downstream */
#define GST_TEE_DYN_LOCK(tee) g_mutex_lock ((tee)->dyn_lock)
#define GST_TEE_DYN_UNLOCK(tee) g_mutex_unlock ((tee)->dyn_lock)
#define DEFAULT_PROP_NUM_SRC_PADS 0
#define DEFAULT_PROP_HAS_SINK_LOOP FALSE
#define DEFAULT_PROP_HAS_CHAIN TRUE
#define DEFAULT_PROP_SILENT TRUE
#define DEFAULT_PROP_LAST_MESSAGE NULL
#define DEFAULT_PULL_MODE GST_TEE_PULL_MODE_NEVER
enum
{
PROP_0,
PROP_NUM_SRC_PADS,
PROP_HAS_SINK_LOOP,
PROP_HAS_CHAIN,
PROP_SILENT,
PROP_LAST_MESSAGE,
PROP_PULL_MODE,
PROP_ALLOC_PAD,
};
static GstStaticPadTemplate tee_src_template = GST_STATIC_PAD_TEMPLATE ("src%d",
GST_PAD_SRC,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
#define _do_init(bla) \
GST_DEBUG_CATEGORY_INIT (gst_tee_debug, "tee", 0, "tee element");
GST_BOILERPLATE_FULL (GstTee, gst_tee, GstElement, GST_TYPE_ELEMENT, _do_init);
/* structure and quark to keep track of which pads have been pushed */
static GQuark push_data;
typedef struct
{
gboolean pushed;
GstFlowReturn result;
gboolean removed;
} PushData;
static GstPad *gst_tee_request_new_pad (GstElement * element,
GstPadTemplate * temp, const gchar * unused);
static void gst_tee_release_pad (GstElement * element, GstPad * pad);
static void gst_tee_finalize (GObject * object);
static void gst_tee_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_tee_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_tee_dispose (GObject * object);
static GstFlowReturn gst_tee_chain (GstPad * pad, GstBuffer * buffer);
static GstFlowReturn gst_tee_chain_list (GstPad * pad, GstBufferList * list);
static GstFlowReturn gst_tee_buffer_alloc (GstPad * pad, guint64 offset,
guint size, GstCaps * caps, GstBuffer ** buf);
static gboolean gst_tee_sink_acceptcaps (GstPad * pad, GstCaps * caps);
static gboolean gst_tee_sink_activate_push (GstPad * pad, gboolean active);
static gboolean gst_tee_src_check_get_range (GstPad * pad);
static gboolean gst_tee_src_activate_pull (GstPad * pad, gboolean active);
static GstFlowReturn gst_tee_src_get_range (GstPad * pad, guint64 offset,
guint length, GstBuffer ** buf);
static void
gst_tee_base_init (gpointer g_class)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details_simple (gstelement_class,
"Tee pipe fitting",
"Generic",
"1-to-N pipe fitting",
"Erik Walthinsen <omega@cse.ogi.edu>, " "Wim Taymans <wim@fluendo.com>");
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&sinktemplate));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&tee_src_template));
push_data = g_quark_from_static_string ("tee-push-data");
}
static void
gst_tee_dispose (GObject * object)
{
GList *item;
restart:
for (item = GST_ELEMENT_PADS (object); item; item = g_list_next (item)) {
GstPad *pad = GST_PAD (item->data);
if (GST_PAD_IS_SRC (pad)) {
gst_element_release_request_pad (GST_ELEMENT (object), pad);
goto restart;
}
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_tee_finalize (GObject * object)
{
GstTee *tee;
tee = GST_TEE (object);
g_free (tee->last_message);
g_mutex_free (tee->dyn_lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_tee_class_init (GstTeeClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = G_OBJECT_CLASS (klass);
gstelement_class = GST_ELEMENT_CLASS (klass);
gobject_class->finalize = gst_tee_finalize;
gobject_class->set_property = gst_tee_set_property;
gobject_class->get_property = gst_tee_get_property;
gobject_class->dispose = gst_tee_dispose;
g_object_class_install_property (gobject_class, PROP_NUM_SRC_PADS,
g_param_spec_int ("num-src-pads", "Num Src Pads",
"The number of source pads", 0, G_MAXINT, DEFAULT_PROP_NUM_SRC_PADS,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_HAS_SINK_LOOP,
g_param_spec_boolean ("has-sink-loop", "Has Sink Loop",
"If the element should spawn a thread (unimplemented and deprecated)",
DEFAULT_PROP_HAS_SINK_LOOP,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_HAS_CHAIN,
g_param_spec_boolean ("has-chain", "Has Chain",
"If the element can operate in push mode", DEFAULT_PROP_HAS_CHAIN,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SILENT,
g_param_spec_boolean ("silent", "Silent",
"Don't produce last_message events", DEFAULT_PROP_SILENT,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_LAST_MESSAGE,
g_param_spec_string ("last-message", "Last Message",
"The message describing current status", DEFAULT_PROP_LAST_MESSAGE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PULL_MODE,
g_param_spec_enum ("pull-mode", "Pull mode",
"Behavior of tee in pull mode", GST_TYPE_TEE_PULL_MODE,
DEFAULT_PULL_MODE,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_ALLOC_PAD,
g_param_spec_object ("alloc-pad", "Allocation Src Pad",
"The pad used for gst_pad_alloc_buffer", GST_TYPE_PAD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_tee_request_new_pad);
gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_tee_release_pad);
}
static void
gst_tee_init (GstTee * tee, GstTeeClass * g_class)
{
tee->dyn_lock = g_mutex_new ();
tee->sinkpad = gst_pad_new_from_static_template (&sinktemplate, "sink");
tee->sink_mode = GST_ACTIVATE_NONE;
gst_pad_set_setcaps_function (tee->sinkpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_setcaps));
gst_pad_set_getcaps_function (tee->sinkpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
gst_pad_set_acceptcaps_function (tee->sinkpad,
GST_DEBUG_FUNCPTR (gst_tee_sink_acceptcaps));
gst_pad_set_bufferalloc_function (tee->sinkpad,
GST_DEBUG_FUNCPTR (gst_tee_buffer_alloc));
gst_pad_set_activatepush_function (tee->sinkpad,
GST_DEBUG_FUNCPTR (gst_tee_sink_activate_push));
gst_pad_set_chain_function (tee->sinkpad, GST_DEBUG_FUNCPTR (gst_tee_chain));
gst_pad_set_chain_list_function (tee->sinkpad,
GST_DEBUG_FUNCPTR (gst_tee_chain_list));
gst_element_add_pad (GST_ELEMENT (tee), tee->sinkpad);
tee->last_message = NULL;
}
static GstPad *
gst_tee_request_new_pad (GstElement * element, GstPadTemplate * templ,
const gchar * unused)
{
gchar *name;
GstPad *srcpad;
GstTee *tee;
GstActivateMode mode;
gboolean res;
PushData *data;
tee = GST_TEE (element);
GST_DEBUG_OBJECT (tee, "requesting pad");
GST_OBJECT_LOCK (tee);
name = g_strdup_printf ("src%d", tee->pad_counter++);
srcpad = gst_pad_new_from_template (templ, name);
g_free (name);
mode = tee->sink_mode;
/* install the data, we automatically free it when the pad is disposed because
* of _release_pad or when the element goes away. */
data = g_new0 (PushData, 1);
data->pushed = FALSE;
data->result = GST_FLOW_NOT_LINKED;
data->removed = FALSE;
g_object_set_qdata_full (G_OBJECT (srcpad), push_data, data, g_free);
GST_OBJECT_UNLOCK (tee);
switch (mode) {
case GST_ACTIVATE_PULL:
/* we already have a src pad in pull mode, and our pull mode can only be
SINGLE, so fall through to activate this new pad in push mode */
case GST_ACTIVATE_PUSH:
res = gst_pad_activate_push (srcpad, TRUE);
break;
default:
res = TRUE;
break;
}
if (!res)
goto activate_failed;
gst_pad_set_setcaps_function (srcpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_setcaps));
gst_pad_set_getcaps_function (srcpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
gst_pad_set_activatepull_function (srcpad,
GST_DEBUG_FUNCPTR (gst_tee_src_activate_pull));
gst_pad_set_checkgetrange_function (srcpad,
GST_DEBUG_FUNCPTR (gst_tee_src_check_get_range));
gst_pad_set_getrange_function (srcpad,
GST_DEBUG_FUNCPTR (gst_tee_src_get_range));
gst_element_add_pad (GST_ELEMENT_CAST (tee), srcpad);
return srcpad;
/* ERRORS */
activate_failed:
{
gboolean changed = FALSE;
GST_OBJECT_LOCK (tee);
GST_DEBUG_OBJECT (tee, "warning failed to activate request pad");
if (tee->allocpad == srcpad) {
tee->allocpad = NULL;
changed = TRUE;
}
GST_OBJECT_UNLOCK (tee);
gst_object_unref (srcpad);
if (changed) {
g_object_notify (G_OBJECT (tee), "alloc-pad");
}
return NULL;
}
}
static void
gst_tee_release_pad (GstElement * element, GstPad * pad)
{
GstTee *tee;
PushData *data;
gboolean changed = FALSE;
tee = GST_TEE (element);
GST_DEBUG_OBJECT (tee, "releasing pad");
/* wait for pending pad_alloc to finish */
GST_TEE_DYN_LOCK (tee);
data = g_object_get_qdata (G_OBJECT (pad), push_data);
GST_OBJECT_LOCK (tee);
/* mark the pad as removed so that future pad_alloc fails with NOT_LINKED. */
data->removed = TRUE;
if (tee->allocpad == pad) {
tee->allocpad = NULL;
changed = TRUE;
}
GST_OBJECT_UNLOCK (tee);
gst_pad_set_active (pad, FALSE);
gst_element_remove_pad (GST_ELEMENT_CAST (tee), pad);
GST_TEE_DYN_UNLOCK (tee);
if (changed) {
g_object_notify (G_OBJECT (tee), "alloc-pad");
}
}
static void
gst_tee_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstTee *tee = GST_TEE (object);
GST_OBJECT_LOCK (tee);
switch (prop_id) {
case PROP_HAS_SINK_LOOP:
tee->has_sink_loop = g_value_get_boolean (value);
if (tee->has_sink_loop) {
g_warning ("tee will never implement has-sink-loop==TRUE");
}
break;
case PROP_HAS_CHAIN:
tee->has_chain = g_value_get_boolean (value);
break;
case PROP_SILENT:
tee->silent = g_value_get_boolean (value);
break;
case PROP_PULL_MODE:
tee->pull_mode = g_value_get_enum (value);
break;
case PROP_ALLOC_PAD:
{
GstPad *pad = g_value_get_object (value);
GST_OBJECT_LOCK (pad);
if (GST_OBJECT_PARENT (pad) == GST_OBJECT_CAST (object))
tee->allocpad = pad;
else
GST_WARNING_OBJECT (object, "Tried to set alloc pad %s which"
" is not my pad", GST_OBJECT_NAME (pad));
GST_OBJECT_UNLOCK (pad);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (tee);
}
static void
gst_tee_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstTee *tee = GST_TEE (object);
GST_OBJECT_LOCK (tee);
switch (prop_id) {
case PROP_NUM_SRC_PADS:
g_value_set_int (value, GST_ELEMENT (tee)->numsrcpads);
break;
case PROP_HAS_SINK_LOOP:
g_value_set_boolean (value, tee->has_sink_loop);
break;
case PROP_HAS_CHAIN:
g_value_set_boolean (value, tee->has_chain);
break;
case PROP_SILENT:
g_value_set_boolean (value, tee->silent);
break;
case PROP_LAST_MESSAGE:
g_value_set_string (value, tee->last_message);
break;
case PROP_PULL_MODE:
g_value_set_enum (value, tee->pull_mode);
break;
case PROP_ALLOC_PAD:
g_value_set_object (value, tee->allocpad);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (tee);
}
/* we have no previous source pad we can use to proxy the pad alloc. Loop over
* the source pads, try to alloc a buffer on each one of them. Keep a reference
* to the first pad that succeeds, we will be using it to alloc more buffers
* later. must be called with the OBJECT_LOCK on tee. */
static GstFlowReturn
gst_tee_find_buffer_alloc (GstTee * tee, guint64 offset, guint size,
GstCaps * caps, GstBuffer ** buf)
{
GstFlowReturn res;
GList *pads;
guint32 cookie;
res = GST_FLOW_NOT_LINKED;
retry:
pads = GST_ELEMENT_CAST (tee)->srcpads;
cookie = GST_ELEMENT_CAST (tee)->pads_cookie;
while (pads) {
GstPad *pad;
PushData *data;
pad = GST_PAD_CAST (pads->data);
gst_object_ref (pad);
GST_DEBUG_OBJECT (tee, "try alloc on pad %s:%s", GST_DEBUG_PAD_NAME (pad));
GST_OBJECT_UNLOCK (tee);
GST_TEE_DYN_LOCK (tee);
data = g_object_get_qdata ((GObject *) pad, push_data);
if (!data->removed)
res = gst_pad_alloc_buffer (pad, offset, size, caps, buf);
else
res = GST_FLOW_NOT_LINKED;
GST_TEE_DYN_UNLOCK (tee);
GST_DEBUG_OBJECT (tee, "got return value %d", res);
gst_object_unref (pad);
GST_OBJECT_LOCK (tee);
if (GST_ELEMENT_CAST (tee)->pads_cookie != cookie) {
GST_DEBUG_OBJECT (tee, "pad list changed, restart");
/* pad list changed, restart. If the pad alloc function returned OK we
* need to unref the buffer */
if (res == GST_FLOW_OK)
gst_buffer_unref (*buf);
*buf = NULL;
goto retry;
}
if (!data->removed && res == GST_FLOW_OK) {
GST_DEBUG_OBJECT (tee, "we have a buffer on pad %s:%s",
GST_DEBUG_PAD_NAME (pad));
/* we have a buffer, keep the pad for later and exit the loop. */
tee->allocpad = pad;
GST_OBJECT_UNLOCK (tee);
g_object_notify ((GObject *) tee, "alloc-pad");
GST_OBJECT_LOCK (tee);
break;
}
/* no valid buffer, try another pad */
pads = g_list_next (pads);
}
return res;
}
static GstFlowReturn
gst_tee_buffer_alloc (GstPad * pad, guint64 offset, guint size,
GstCaps * caps, GstBuffer ** buf)
{
GstTee *tee;
GstFlowReturn res;
GstPad *allocpad;
tee = GST_TEE_CAST (GST_PAD_PARENT (pad));
res = GST_FLOW_NOT_LINKED;
GST_OBJECT_LOCK (tee);
if ((allocpad = tee->allocpad)) {
PushData *data;
/* if we had a previous pad we used for allocating a buffer, continue using
* it. */
GST_DEBUG_OBJECT (tee, "using pad %s:%s for alloc",
GST_DEBUG_PAD_NAME (allocpad));
gst_object_ref (allocpad);
GST_OBJECT_UNLOCK (tee);
GST_TEE_DYN_LOCK (tee);
data = g_object_get_qdata ((GObject *) allocpad, push_data);
if (!data->removed)
res = gst_pad_alloc_buffer (allocpad, offset, size, caps, buf);
else
res = GST_FLOW_NOT_LINKED;
GST_TEE_DYN_UNLOCK (tee);
gst_object_unref (allocpad);
GST_OBJECT_LOCK (tee);
}
/* either we failed to alloc on the the previous pad or we did not have a
* previous pad. */
if (res == GST_FLOW_NOT_LINKED) {
/* find a new pad to alloc a buffer on */
GST_DEBUG_OBJECT (tee, "finding pad for alloc");
res = gst_tee_find_buffer_alloc (tee, offset, size, caps, buf);
}
GST_OBJECT_UNLOCK (tee);
return res;
}
/* on the sink we accept caps that are acceptable to all srcpads */
static gboolean
gst_tee_sink_acceptcaps (GstPad * pad, GstCaps * caps)
{
GstTee *tee;
gboolean res, done;
GstIterator *it;
tee = GST_TEE_CAST (GST_PAD_PARENT (pad));
it = gst_element_iterate_src_pads (GST_ELEMENT_CAST (tee));
res = TRUE;
done = FALSE;
while (!done && res) {
gpointer item;
switch (gst_iterator_next (it, &item)) {
case GST_ITERATOR_OK:
res &= gst_pad_peer_accept_caps (GST_PAD_CAST (item), caps);
gst_object_unref (item);
break;
case GST_ITERATOR_RESYNC:
res = TRUE;
gst_iterator_resync (it);
break;
case GST_ITERATOR_ERROR:
res = FALSE;
done = TRUE;
break;
case GST_ITERATOR_DONE:
done = TRUE;
break;
}
}
gst_iterator_free (it);
return res;
}
static void
gst_tee_do_message (GstTee * tee, GstPad * pad, gpointer data, gboolean is_list)
{
GST_OBJECT_LOCK (tee);
g_free (tee->last_message);
if (is_list) {
tee->last_message =
g_strdup_printf ("chain-list ******* (%s:%s)t %p",
GST_DEBUG_PAD_NAME (pad), data);
} else {
tee->last_message =
g_strdup_printf ("chain ******* (%s:%s)t (%d bytes, %"
G_GUINT64_FORMAT ") %p", GST_DEBUG_PAD_NAME (pad),
GST_BUFFER_SIZE (data), GST_BUFFER_TIMESTAMP (data), data);
}
GST_OBJECT_UNLOCK (tee);
g_object_notify (G_OBJECT (tee), "last_message");
}
static GstFlowReturn
gst_tee_do_push (GstTee * tee, GstPad * pad, gpointer data, gboolean is_list)
{
GstFlowReturn res;
/* Push */
if (pad == tee->pull_pad) {
/* don't push on the pad we're pulling from */
res = GST_FLOW_OK;
} else if (is_list) {
res =
gst_pad_push_list (pad,
gst_buffer_list_ref (GST_BUFFER_LIST_CAST (data)));
} else {
res = gst_pad_push (pad, gst_buffer_ref (GST_BUFFER_CAST (data)));
}
return res;
}
static void
clear_pads (GstPad * pad, GstTee * tee)
{
PushData *data;
data = g_object_get_qdata ((GObject *) pad, push_data);
/* the data must be there or we have a screwed up internal state */
g_assert (data != NULL);
data->pushed = FALSE;
data->result = GST_FLOW_NOT_LINKED;
}
static GstFlowReturn
gst_tee_handle_data (GstTee * tee, gpointer data, gboolean is_list)
{
GList *pads;
guint32 cookie;
GstFlowReturn ret, cret;
if (G_UNLIKELY (!tee->silent))
gst_tee_do_message (tee, tee->sinkpad, data, is_list);
GST_OBJECT_LOCK (tee);
pads = GST_ELEMENT_CAST (tee)->srcpads;
/* special case for zero pads */
if (G_UNLIKELY (!pads))
goto no_pads;
/* special case for just one pad that avoids reffing the buffer */
if (!pads->next) {
GstPad *pad = GST_PAD_CAST (pads->data);
GST_OBJECT_UNLOCK (tee);
if (pad == tee->pull_pad) {
ret = GST_FLOW_OK;
} else if (is_list) {
ret = gst_pad_push_list (pad, GST_BUFFER_LIST_CAST (data));
} else {
ret = gst_pad_push (pad, GST_BUFFER_CAST (data));
}
return ret;
}
/* mark all pads as 'not pushed on yet' */
g_list_foreach (pads, (GFunc) clear_pads, tee);
restart:
cret = GST_FLOW_NOT_LINKED;
pads = GST_ELEMENT_CAST (tee)->srcpads;
cookie = GST_ELEMENT_CAST (tee)->pads_cookie;
while (pads) {
GstPad *pad;
PushData *pdata;
pad = GST_PAD_CAST (pads->data);
/* get the private data, something is really wrong with the internal state
* when it is not there */
pdata = g_object_get_qdata ((GObject *) pad, push_data);
g_assert (pdata != NULL);
if (G_LIKELY (!pdata->pushed)) {
/* not yet pushed, release lock and start pushing */
gst_object_ref (pad);
GST_OBJECT_UNLOCK (tee);
GST_LOG_OBJECT (tee, "Starting to push %s %p",
is_list ? "list" : "buffer", data);
ret = gst_tee_do_push (tee, pad, data, is_list);
GST_LOG_OBJECT (tee, "Pushing item %p yielded result %s", data,
gst_flow_get_name (ret));
GST_OBJECT_LOCK (tee);
/* keep track of which pad we pushed and the result value. We need to do
* this before we release the refcount on the pad, the PushData is
* destroyed when the last ref of the pad goes away. */
pdata->pushed = TRUE;
pdata->result = ret;
gst_object_unref (pad);
} else {
/* already pushed, use previous return value */
ret = pdata->result;
GST_LOG_OBJECT (tee, "pad already pushed with %s",
gst_flow_get_name (ret));
}
/* before we go combining the return value, check if the pad list is still
* the same. It could be possible that the pad we just pushed was removed
* and the return value it not valid anymore */
if (G_UNLIKELY (GST_ELEMENT_CAST (tee)->pads_cookie != cookie)) {
GST_LOG_OBJECT (tee, "pad list changed");
/* the list of pads changed, restart iteration. Pads that we already
* pushed on and are still in the new list, will not be pushed on
* again. */
goto restart;
}
/* stop pushing more buffers when we have a fatal error */
if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED))
goto error;
/* keep all other return values, overwriting the previous one. */
if (G_LIKELY (ret != GST_FLOW_NOT_LINKED)) {
GST_LOG_OBJECT (tee, "Replacing ret val %d with %d", cret, ret);
cret = ret;
}
pads = g_list_next (pads);
}
GST_OBJECT_UNLOCK (tee);
gst_mini_object_unref (GST_MINI_OBJECT_CAST (data));
/* no need to unset gvalue */
return cret;
/* ERRORS */
no_pads:
{
GST_DEBUG_OBJECT (tee, "there are no pads, return not-linked");
ret = GST_FLOW_NOT_LINKED;
goto error;
}
error:
{
GST_DEBUG_OBJECT (tee, "received error %s", gst_flow_get_name (ret));
GST_OBJECT_UNLOCK (tee);
gst_mini_object_unref (GST_MINI_OBJECT_CAST (data));
return ret;
}
}
static GstFlowReturn
gst_tee_chain (GstPad * pad, GstBuffer * buffer)
{
GstFlowReturn res;
GstTee *tee;
tee = GST_TEE_CAST (GST_OBJECT_PARENT (pad));
GST_DEBUG_OBJECT (tee, "received buffer %p", buffer);
res = gst_tee_handle_data (tee, buffer, FALSE);
GST_DEBUG_OBJECT (tee, "handled buffer %s", gst_flow_get_name (res));
return res;
}
static GstFlowReturn
gst_tee_chain_list (GstPad * pad, GstBufferList * list)
{
GstFlowReturn res;
GstTee *tee;
tee = GST_TEE_CAST (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (tee, "received list %p", list);
res = gst_tee_handle_data (tee, list, TRUE);
GST_DEBUG_OBJECT (tee, "handled list %s", gst_flow_get_name (res));
gst_object_unref (tee);
return res;
}
static gboolean
gst_tee_sink_activate_push (GstPad * pad, gboolean active)
{
GstTee *tee;
tee = GST_TEE (GST_OBJECT_PARENT (pad));
GST_OBJECT_LOCK (tee);
tee->sink_mode = active && GST_ACTIVATE_PUSH;
if (active && !tee->has_chain)
goto no_chain;
GST_OBJECT_UNLOCK (tee);
return TRUE;
/* ERRORS */
no_chain:
{
GST_OBJECT_UNLOCK (tee);
GST_INFO_OBJECT (tee,
"Tee cannot operate in push mode with has-chain==FALSE");
return FALSE;
}
}
static gboolean
gst_tee_src_activate_pull (GstPad * pad, gboolean active)
{
GstTee *tee;
gboolean res;
GstPad *sinkpad;
tee = GST_TEE (gst_pad_get_parent (pad));
GST_OBJECT_LOCK (tee);
if (tee->pull_mode == GST_TEE_PULL_MODE_NEVER)
goto cannot_pull;
if (tee->pull_mode == GST_TEE_PULL_MODE_SINGLE && active && tee->pull_pad)
goto cannot_pull_multiple_srcs;
sinkpad = gst_object_ref (tee->sinkpad);
GST_OBJECT_UNLOCK (tee);
res = gst_pad_activate_pull (sinkpad, active);
gst_object_unref (sinkpad);
if (!res)
goto sink_activate_failed;
GST_OBJECT_LOCK (tee);
if (active) {
if (tee->pull_mode == GST_TEE_PULL_MODE_SINGLE)
tee->pull_pad = pad;
} else {
if (pad == tee->pull_pad)
tee->pull_pad = NULL;
}
tee->sink_mode = active && GST_ACTIVATE_PULL;
GST_OBJECT_UNLOCK (tee);
gst_object_unref (tee);
return res;
/* ERRORS */
cannot_pull:
{
GST_OBJECT_UNLOCK (tee);
GST_INFO_OBJECT (tee, "Cannot activate in pull mode, pull-mode "
"set to NEVER");
gst_object_unref (tee);
return FALSE;
}
cannot_pull_multiple_srcs:
{
GST_OBJECT_UNLOCK (tee);
GST_INFO_OBJECT (tee, "Cannot activate multiple src pads in pull mode, "
"pull-mode set to SINGLE");
gst_object_unref (tee);
return FALSE;
}
sink_activate_failed:
{
GST_INFO_OBJECT (tee, "Failed to %sactivate sink pad in pull mode",
active ? "" : "de");
gst_object_unref (tee);
return FALSE;
}
}
static gboolean
gst_tee_src_check_get_range (GstPad * pad)
{
GstTee *tee;
gboolean res;
GstPad *sinkpad;
tee = GST_TEE (gst_pad_get_parent (pad));
GST_OBJECT_LOCK (tee);
if (tee->pull_mode == GST_TEE_PULL_MODE_NEVER)
goto cannot_pull;
if (tee->pull_mode == GST_TEE_PULL_MODE_SINGLE && tee->pull_pad)
goto cannot_pull_multiple_srcs;
sinkpad = gst_object_ref (tee->sinkpad);
GST_OBJECT_UNLOCK (tee);
res = gst_pad_check_pull_range (sinkpad);
gst_object_unref (sinkpad);
gst_object_unref (tee);
return res;
/* ERRORS */
cannot_pull:
{
GST_OBJECT_UNLOCK (tee);
GST_INFO_OBJECT (tee, "Cannot activate in pull mode, pull-mode "
"set to NEVER");
gst_object_unref (tee);
return FALSE;
}
cannot_pull_multiple_srcs:
{
GST_OBJECT_UNLOCK (tee);
GST_INFO_OBJECT (tee, "Cannot activate multiple src pads in pull mode, "
"pull-mode set to SINGLE");
gst_object_unref (tee);
return FALSE;
}
}
static void
gst_tee_push_eos (GstPad * pad, GstTee * tee)
{
if (pad != tee->pull_pad)
gst_pad_push_event (pad, gst_event_new_eos ());
gst_object_unref (pad);
}
static void
gst_tee_pull_eos (GstTee * tee)
{
GstIterator *iter;
iter = gst_element_iterate_src_pads (GST_ELEMENT (tee));
gst_iterator_foreach (iter, (GFunc) gst_tee_push_eos, tee);
gst_iterator_free (iter);
}
static GstFlowReturn
gst_tee_src_get_range (GstPad * pad, guint64 offset, guint length,
GstBuffer ** buf)
{
GstTee *tee;
GstFlowReturn ret;
tee = GST_TEE (gst_pad_get_parent (pad));
ret = gst_pad_pull_range (tee->sinkpad, offset, length, buf);
if (ret == GST_FLOW_OK)
ret = gst_tee_handle_data (tee, gst_buffer_ref (*buf), FALSE);
else if (ret == GST_FLOW_UNEXPECTED)
gst_tee_pull_eos (tee);
gst_object_unref (tee);
return ret;
}