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gstreamer/plugins/elements/gstidentity.c
Wim Taymans 2ff17fb622 basetransform: fix sink event handling 
Implement the sink event handling like the src event handler. Make the default
implementation parse and forward the event. This makes it possible to actually
return an error value from the event handler.
2011-07-22 21:17:42 +02:00

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2005 Wim Taymans <wim@fluendo.com>
*
* gstidentity.c:
*
* 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-identity
*
* Dummy element that passes incomming data through unmodified. It has some
* useful diagnostic functions, such as offset and timestamp checking.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include "../../gst/gst-i18n-lib.h"
#include "gstidentity.h"
#include <gst/gstmarshal.h>
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC (gst_identity_debug);
#define GST_CAT_DEFAULT gst_identity_debug
/* Identity signals and args */
enum
{
SIGNAL_HANDOFF,
/* FILL ME */
LAST_SIGNAL
};
#define DEFAULT_SLEEP_TIME 0
#define DEFAULT_DUPLICATE 1
#define DEFAULT_ERROR_AFTER -1
#define DEFAULT_DROP_PROBABILITY 0.0
#define DEFAULT_DATARATE 0
#define DEFAULT_SILENT FALSE
#define DEFAULT_SINGLE_SEGMENT FALSE
#define DEFAULT_DUMP FALSE
#define DEFAULT_SYNC FALSE
#define DEFAULT_CHECK_PERFECT FALSE
#define DEFAULT_CHECK_IMPERFECT_TIMESTAMP FALSE
#define DEFAULT_CHECK_IMPERFECT_OFFSET FALSE
#define DEFAULT_SIGNAL_HANDOFFS TRUE
enum
{
PROP_0,
PROP_SLEEP_TIME,
PROP_ERROR_AFTER,
PROP_DROP_PROBABILITY,
PROP_DATARATE,
PROP_SILENT,
PROP_SINGLE_SEGMENT,
PROP_LAST_MESSAGE,
PROP_DUMP,
PROP_SYNC,
PROP_CHECK_PERFECT,
PROP_CHECK_IMPERFECT_TIMESTAMP,
PROP_CHECK_IMPERFECT_OFFSET,
PROP_SIGNAL_HANDOFFS
};
#define _do_init \
GST_DEBUG_CATEGORY_INIT (gst_identity_debug, "identity", 0, "identity element");
#define gst_identity_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstIdentity, gst_identity, GST_TYPE_BASE_TRANSFORM,
_do_init);
static void gst_identity_finalize (GObject * object);
static void gst_identity_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_identity_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_identity_sink_event (GstBaseTransform * trans,
GstEvent * event);
static GstFlowReturn gst_identity_transform_ip (GstBaseTransform * trans,
GstBuffer * buf);
static GstFlowReturn gst_identity_prepare_output_buffer (GstBaseTransform *
trans, GstBuffer * in_buf, GstBuffer ** out_buf);
static gboolean gst_identity_start (GstBaseTransform * trans);
static gboolean gst_identity_stop (GstBaseTransform * trans);
static guint gst_identity_signals[LAST_SIGNAL] = { 0 };
static GParamSpec *pspec_last_message = NULL;
static void
gst_identity_finalize (GObject * object)
{
GstIdentity *identity;
identity = GST_IDENTITY (object);
g_free (identity->last_message);
#if !GLIB_CHECK_VERSION(2,26,0)
g_static_rec_mutex_free (&identity->notify_lock);
#endif
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/* fixme: do something about this */
static void
marshal_VOID__MINIOBJECT (GClosure * closure, GValue * return_value,
guint n_param_values, const GValue * param_values, gpointer invocation_hint,
gpointer marshal_data)
{
typedef void (*marshalfunc_VOID__MINIOBJECT) (gpointer obj, gpointer arg1,
gpointer data2);
register marshalfunc_VOID__MINIOBJECT callback;
register GCClosure *cc = (GCClosure *) closure;
register gpointer data1, data2;
g_return_if_fail (n_param_values == 2);
if (G_CCLOSURE_SWAP_DATA (closure)) {
data1 = closure->data;
data2 = g_value_peek_pointer (param_values + 0);
} else {
data1 = g_value_peek_pointer (param_values + 0);
data2 = closure->data;
}
callback =
(marshalfunc_VOID__MINIOBJECT) (marshal_data ? marshal_data :
cc->callback);
callback (data1, g_value_get_boxed (param_values + 1), data2);
}
static void
gst_identity_class_init (GstIdentityClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseTransformClass *gstbasetrans_class;
gobject_class = G_OBJECT_CLASS (klass);
gstelement_class = GST_ELEMENT_CLASS (klass);
gstbasetrans_class = GST_BASE_TRANSFORM_CLASS (klass);
gobject_class->set_property = gst_identity_set_property;
gobject_class->get_property = gst_identity_get_property;
g_object_class_install_property (gobject_class, PROP_SLEEP_TIME,
g_param_spec_uint ("sleep-time", "Sleep time",
"Microseconds to sleep between processing", 0, G_MAXUINT,
DEFAULT_SLEEP_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_ERROR_AFTER,
g_param_spec_int ("error-after", "Error After", "Error after N buffers",
G_MININT, G_MAXINT, DEFAULT_ERROR_AFTER,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DROP_PROBABILITY,
g_param_spec_float ("drop-probability", "Drop Probability",
"The Probability a buffer is dropped", 0.0, 1.0,
DEFAULT_DROP_PROBABILITY,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DATARATE,
g_param_spec_int ("datarate", "Datarate",
"(Re)timestamps buffers with number of bytes per second (0 = inactive)",
0, G_MAXINT, DEFAULT_DATARATE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SILENT,
g_param_spec_boolean ("silent", "silent", "silent", DEFAULT_SILENT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SINGLE_SEGMENT,
g_param_spec_boolean ("single-segment", "Single Segment",
"Timestamp buffers and eat segments so as to appear as one segment",
DEFAULT_SINGLE_SEGMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
pspec_last_message = g_param_spec_string ("last-message", "last-message",
"last-message", NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
g_object_class_install_property (gobject_class, PROP_LAST_MESSAGE,
pspec_last_message);
g_object_class_install_property (gobject_class, PROP_DUMP,
g_param_spec_boolean ("dump", "Dump", "Dump buffer contents to stdout",
DEFAULT_DUMP, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SYNC,
g_param_spec_boolean ("sync", "Synchronize",
"Synchronize to pipeline clock", DEFAULT_SYNC,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CHECK_PERFECT,
g_param_spec_boolean ("check-perfect", "Check For Perfect Stream",
"Verify that the stream is time- and data-contiguous. "
"This only logs in the debug log. This will be deprecated in favor "
"of the check-imperfect-timestamp/offset properties.",
DEFAULT_CHECK_PERFECT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_CHECK_IMPERFECT_TIMESTAMP,
g_param_spec_boolean ("check-imperfect-timestamp",
"Check for discontiguous timestamps",
"Send element messages if timestamps and durations do not match up",
DEFAULT_CHECK_IMPERFECT_TIMESTAMP,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CHECK_IMPERFECT_OFFSET,
g_param_spec_boolean ("check-imperfect-offset",
"Check for discontiguous offset",
"Send element messages if offset and offset_end do not match up",
DEFAULT_CHECK_IMPERFECT_OFFSET,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstIdentity:signal-handoffs
*
* If set to #TRUE, the identity will emit a handoff signal when handling a buffer.
* When set to #FALSE, no signal will be emited, which might improve performance.
*
* Since: 0.10.16
*/
g_object_class_install_property (gobject_class, PROP_SIGNAL_HANDOFFS,
g_param_spec_boolean ("signal-handoffs",
"Signal handoffs", "Send a signal before pushing the buffer",
DEFAULT_SIGNAL_HANDOFFS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstIdentity::handoff:
* @identity: the identity instance
* @buffer: the buffer that just has been received
* @pad: the pad that received it
*
* This signal gets emitted before passing the buffer downstream.
*/
gst_identity_signals[SIGNAL_HANDOFF] =
g_signal_new ("handoff", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstIdentityClass, handoff), NULL, NULL,
marshal_VOID__MINIOBJECT, G_TYPE_NONE, 1, GST_TYPE_BUFFER);
gobject_class->finalize = gst_identity_finalize;
gst_element_class_set_details_simple (gstelement_class,
"Identity",
"Generic",
"Pass data without modification", "Erik Walthinsen <omega@cse.ogi.edu>");
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&srctemplate));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&sinktemplate));
gstbasetrans_class->sink_event = GST_DEBUG_FUNCPTR (gst_identity_sink_event);
gstbasetrans_class->transform_ip =
GST_DEBUG_FUNCPTR (gst_identity_transform_ip);
gstbasetrans_class->prepare_output_buffer =
GST_DEBUG_FUNCPTR (gst_identity_prepare_output_buffer);
gstbasetrans_class->start = GST_DEBUG_FUNCPTR (gst_identity_start);
gstbasetrans_class->stop = GST_DEBUG_FUNCPTR (gst_identity_stop);
}
static void
gst_identity_init (GstIdentity * identity)
{
identity->sleep_time = DEFAULT_SLEEP_TIME;
identity->error_after = DEFAULT_ERROR_AFTER;
identity->drop_probability = DEFAULT_DROP_PROBABILITY;
identity->datarate = DEFAULT_DATARATE;
identity->silent = DEFAULT_SILENT;
identity->single_segment = DEFAULT_SINGLE_SEGMENT;
identity->sync = DEFAULT_SYNC;
identity->check_perfect = DEFAULT_CHECK_PERFECT;
identity->check_imperfect_timestamp = DEFAULT_CHECK_IMPERFECT_TIMESTAMP;
identity->check_imperfect_offset = DEFAULT_CHECK_IMPERFECT_OFFSET;
identity->dump = DEFAULT_DUMP;
identity->last_message = NULL;
identity->signal_handoffs = DEFAULT_SIGNAL_HANDOFFS;
#if !GLIB_CHECK_VERSION(2,26,0)
g_static_rec_mutex_init (&identity->notify_lock);
#endif
gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM_CAST (identity), TRUE);
}
static void
gst_identity_notify_last_message (GstIdentity * identity)
{
/* FIXME: this hacks around a bug in GLib/GObject: doing concurrent
* g_object_notify() on the same object might lead to crashes, see
* http://bugzilla.gnome.org/show_bug.cgi?id=166020#c60 and follow-ups.
* So we really don't want to do a g_object_notify() here for out-of-band
* events with the streaming thread possibly also doing a g_object_notify()
* for an in-band buffer or event. This is fixed in GLib >= 2.26 */
#if !GLIB_CHECK_VERSION(2,26,0)
g_static_rec_mutex_lock (&identity->notify_lock);
g_object_notify ((GObject *) identity, "last-message");
g_static_rec_mutex_unlock (&identity->notify_lock);
#else
g_object_notify_by_pspec ((GObject *) identity, pspec_last_message);
#endif
}
static gboolean
gst_identity_sink_event (GstBaseTransform * trans, GstEvent * event)
{
GstIdentity *identity;
gboolean ret = TRUE;
identity = GST_IDENTITY (trans);
if (!identity->silent) {
const GstStructure *s;
gchar *sstr;
GST_OBJECT_LOCK (identity);
g_free (identity->last_message);
if ((s = gst_event_get_structure (event)))
sstr = gst_structure_to_string (s);
else
sstr = g_strdup ("");
identity->last_message =
g_strdup_printf ("event ******* (%s:%s) E (type: %d, %s) %p",
GST_DEBUG_PAD_NAME (trans->sinkpad), GST_EVENT_TYPE (event), sstr,
event);
g_free (sstr);
GST_OBJECT_UNLOCK (identity);
gst_identity_notify_last_message (identity);
}
if (identity->single_segment && (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT)) {
if (trans->have_segment == FALSE) {
GstEvent *news;
GstSegment segment;
gst_event_copy_segment (event, &segment);
gst_event_copy_segment (event, &trans->segment);
trans->have_segment = TRUE;
/* This is the first segment, send out a (0, -1) segment */
gst_segment_init (&segment, segment.format);
news = gst_event_new_segment (&segment);
gst_pad_event_default (trans->sinkpad, news);
}
}
/* Reset previous timestamp, duration and offsets on NEWSEGMENT
* to prevent false warnings when checking for perfect streams */
if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
identity->prev_timestamp = identity->prev_duration = GST_CLOCK_TIME_NONE;
identity->prev_offset = identity->prev_offset_end = GST_BUFFER_OFFSET_NONE;
}
if (identity->single_segment && (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT)) {
/* eat up segments */
gst_event_unref (event);
ret = TRUE;
} else {
ret = GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
}
return ret;
}
static GstFlowReturn
gst_identity_prepare_output_buffer (GstBaseTransform * trans,
GstBuffer * in_buf, GstBuffer ** out_buf)
{
GstIdentity *identity = GST_IDENTITY (trans);
/* only bother if we may have to alter metadata */
if (identity->datarate > 0 || identity->single_segment) {
if (gst_buffer_is_writable (in_buf))
/* reuse */
*out_buf = in_buf;
else {
/* copy */
*out_buf = gst_buffer_copy (in_buf);
}
} else
*out_buf = in_buf;
return GST_FLOW_OK;
}
static void
gst_identity_check_perfect (GstIdentity * identity, GstBuffer * buf)
{
GstClockTime timestamp;
timestamp = GST_BUFFER_TIMESTAMP (buf);
/* see if we need to do perfect stream checking */
/* invalid timestamp drops us out of check. FIXME: maybe warn ? */
if (timestamp != GST_CLOCK_TIME_NONE) {
/* check if we had a previous buffer to compare to */
if (identity->prev_timestamp != GST_CLOCK_TIME_NONE &&
identity->prev_duration != GST_CLOCK_TIME_NONE) {
guint64 offset, t_expected;
gint64 dt;
t_expected = identity->prev_timestamp + identity->prev_duration;
dt = timestamp - t_expected;
if (dt != 0) {
GST_WARNING_OBJECT (identity,
"Buffer not time-contiguous with previous one: " "prev ts %"
GST_TIME_FORMAT ", prev dur %" GST_TIME_FORMAT ", new ts %"
GST_TIME_FORMAT " (expected ts %" GST_TIME_FORMAT ", delta=%c%"
GST_TIME_FORMAT ")", GST_TIME_ARGS (identity->prev_timestamp),
GST_TIME_ARGS (identity->prev_duration), GST_TIME_ARGS (timestamp),
GST_TIME_ARGS (t_expected), (dt < 0) ? '-' : '+',
GST_TIME_ARGS ((dt < 0) ? (GstClockTime) (-dt) : dt));
}
offset = GST_BUFFER_OFFSET (buf);
if (identity->prev_offset_end != offset &&
identity->prev_offset_end != GST_BUFFER_OFFSET_NONE &&
offset != GST_BUFFER_OFFSET_NONE) {
GST_WARNING_OBJECT (identity,
"Buffer not data-contiguous with previous one: "
"prev offset_end %" G_GINT64_FORMAT ", new offset %"
G_GINT64_FORMAT, identity->prev_offset_end, offset);
}
} else {
GST_DEBUG_OBJECT (identity, "can't check time-contiguity, no timestamp "
"and/or duration were set on previous buffer");
}
}
}
static void
gst_identity_check_imperfect_timestamp (GstIdentity * identity, GstBuffer * buf)
{
GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buf);
/* invalid timestamp drops us out of check. FIXME: maybe warn ? */
if (timestamp != GST_CLOCK_TIME_NONE) {
/* check if we had a previous buffer to compare to */
if (identity->prev_timestamp != GST_CLOCK_TIME_NONE &&
identity->prev_duration != GST_CLOCK_TIME_NONE) {
GstClockTime t_expected;
GstClockTimeDiff dt;
t_expected = identity->prev_timestamp + identity->prev_duration;
dt = GST_CLOCK_DIFF (t_expected, timestamp);
if (dt != 0) {
/*
* "imperfect-timestamp" bus message:
* @identity: the identity instance
* @prev-timestamp: the previous buffer timestamp
* @prev-duration: the previous buffer duration
* @prev-offset: the previous buffer offset
* @prev-offset-end: the previous buffer offset end
* @cur-timestamp: the current buffer timestamp
* @cur-duration: the current buffer duration
* @cur-offset: the current buffer offset
* @cur-offset-end: the current buffer offset end
*
* This bus message gets emitted if the check-imperfect-timestamp
* property is set and there is a gap in time between the
* last buffer and the newly received buffer.
*/
gst_element_post_message (GST_ELEMENT (identity),
gst_message_new_element (GST_OBJECT (identity),
gst_structure_new ("imperfect-timestamp",
"prev-timestamp", G_TYPE_UINT64,
identity->prev_timestamp, "prev-duration", G_TYPE_UINT64,
identity->prev_duration, "prev-offset", G_TYPE_UINT64,
identity->prev_offset, "prev-offset-end", G_TYPE_UINT64,
identity->prev_offset_end, "cur-timestamp", G_TYPE_UINT64,
timestamp, "cur-duration", G_TYPE_UINT64,
GST_BUFFER_DURATION (buf), "cur-offset", G_TYPE_UINT64,
GST_BUFFER_OFFSET (buf), "cur-offset-end", G_TYPE_UINT64,
GST_BUFFER_OFFSET_END (buf), NULL)));
}
} else {
GST_DEBUG_OBJECT (identity, "can't check data-contiguity, no "
"offset_end was set on previous buffer");
}
}
}
static void
gst_identity_check_imperfect_offset (GstIdentity * identity, GstBuffer * buf)
{
guint64 offset;
offset = GST_BUFFER_OFFSET (buf);
if (identity->prev_offset_end != offset &&
identity->prev_offset_end != GST_BUFFER_OFFSET_NONE &&
offset != GST_BUFFER_OFFSET_NONE) {
/*
* "imperfect-offset" bus message:
* @identity: the identity instance
* @prev-timestamp: the previous buffer timestamp
* @prev-duration: the previous buffer duration
* @prev-offset: the previous buffer offset
* @prev-offset-end: the previous buffer offset end
* @cur-timestamp: the current buffer timestamp
* @cur-duration: the current buffer duration
* @cur-offset: the current buffer offset
* @cur-offset-end: the current buffer offset end
*
* This bus message gets emitted if the check-imperfect-offset
* property is set and there is a gap in offsets between the
* last buffer and the newly received buffer.
*/
gst_element_post_message (GST_ELEMENT (identity),
gst_message_new_element (GST_OBJECT (identity),
gst_structure_new ("imperfect-offset", "prev-timestamp",
G_TYPE_UINT64, identity->prev_timestamp, "prev-duration",
G_TYPE_UINT64, identity->prev_duration, "prev-offset",
G_TYPE_UINT64, identity->prev_offset, "prev-offset-end",
G_TYPE_UINT64, identity->prev_offset_end, "cur-timestamp",
G_TYPE_UINT64, GST_BUFFER_TIMESTAMP (buf), "cur-duration",
G_TYPE_UINT64, GST_BUFFER_DURATION (buf), "cur-offset",
G_TYPE_UINT64, GST_BUFFER_OFFSET (buf), "cur-offset-end",
G_TYPE_UINT64, GST_BUFFER_OFFSET_END (buf), NULL)));
} else {
GST_DEBUG_OBJECT (identity, "can't check offset contiguity, no offset "
"and/or offset_end were set on previous buffer");
}
}
static const gchar *
print_pretty_time (gchar * ts_str, gsize ts_str_len, GstClockTime ts)
{
if (ts == GST_CLOCK_TIME_NONE)
return "none";
g_snprintf (ts_str, ts_str_len, "%" GST_TIME_FORMAT, GST_TIME_ARGS (ts));
return ts_str;
}
static void
gst_identity_update_last_message_for_buffer (GstIdentity * identity,
const gchar * action, GstBuffer * buf, gsize size)
{
gchar ts_str[64], dur_str[64];
GST_OBJECT_LOCK (identity);
g_free (identity->last_message);
identity->last_message = g_strdup_printf ("%s ******* (%s:%s)i "
"(%" G_GSIZE_FORMAT " bytes, timestamp: %s, duration: %s, offset: %"
G_GINT64_FORMAT ", " "offset_end: % " G_GINT64_FORMAT ", flags: %d) %p",
action, GST_DEBUG_PAD_NAME (GST_BASE_TRANSFORM_CAST (identity)->sinkpad),
size, print_pretty_time (ts_str, sizeof (ts_str),
GST_BUFFER_TIMESTAMP (buf)), print_pretty_time (dur_str,
sizeof (dur_str), GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf),
GST_BUFFER_OFFSET_END (buf), GST_BUFFER_FLAGS (buf), buf);
GST_OBJECT_UNLOCK (identity);
gst_identity_notify_last_message (identity);
}
static GstFlowReturn
gst_identity_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
{
GstFlowReturn ret = GST_FLOW_OK;
GstIdentity *identity = GST_IDENTITY (trans);
GstClockTime runtimestamp = G_GINT64_CONSTANT (0);
guint8 *data;
gsize size;
data = gst_buffer_map (buf, &size, NULL, GST_MAP_READ);
if (identity->check_perfect)
gst_identity_check_perfect (identity, buf);
if (identity->check_imperfect_timestamp)
gst_identity_check_imperfect_timestamp (identity, buf);
if (identity->check_imperfect_offset)
gst_identity_check_imperfect_offset (identity, buf);
/* update prev values */
identity->prev_timestamp = GST_BUFFER_TIMESTAMP (buf);
identity->prev_duration = GST_BUFFER_DURATION (buf);
identity->prev_offset_end = GST_BUFFER_OFFSET_END (buf);
identity->prev_offset = GST_BUFFER_OFFSET (buf);
if (identity->error_after >= 0) {
identity->error_after--;
if (identity->error_after == 0)
goto error_after;
}
if (identity->drop_probability > 0.0) {
if ((gfloat) (1.0 * rand () / (RAND_MAX)) < identity->drop_probability)
goto dropped;
}
if (identity->dump) {
gst_util_dump_mem (data, size);
}
if (!identity->silent) {
gst_identity_update_last_message_for_buffer (identity, "chain", buf, size);
}
if (identity->datarate > 0) {
GstClockTime time = gst_util_uint64_scale_int (identity->offset,
GST_SECOND, identity->datarate);
GST_BUFFER_TIMESTAMP (buf) = time;
GST_BUFFER_DURATION (buf) = size * GST_SECOND / identity->datarate;
}
if (identity->signal_handoffs)
g_signal_emit (identity, gst_identity_signals[SIGNAL_HANDOFF], 0, buf);
if (trans->segment.format == GST_FORMAT_TIME)
runtimestamp = gst_segment_to_running_time (&trans->segment,
GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (buf));
if ((identity->sync) && (trans->segment.format == GST_FORMAT_TIME)) {
GstClock *clock;
GST_OBJECT_LOCK (identity);
if ((clock = GST_ELEMENT (identity)->clock)) {
GstClockReturn cret;
GstClockTime timestamp;
timestamp = runtimestamp + GST_ELEMENT (identity)->base_time;
/* save id if we need to unlock */
/* FIXME: actually unlock this somewhere in the state changes */
identity->clock_id = gst_clock_new_single_shot_id (clock, timestamp);
GST_OBJECT_UNLOCK (identity);
cret = gst_clock_id_wait (identity->clock_id, NULL);
GST_OBJECT_LOCK (identity);
if (identity->clock_id) {
gst_clock_id_unref (identity->clock_id);
identity->clock_id = NULL;
}
if (cret == GST_CLOCK_UNSCHEDULED)
ret = GST_FLOW_UNEXPECTED;
}
GST_OBJECT_UNLOCK (identity);
}
identity->offset += size;
if (identity->sleep_time && ret == GST_FLOW_OK)
g_usleep (identity->sleep_time);
if (identity->single_segment && (trans->segment.format == GST_FORMAT_TIME)
&& (ret == GST_FLOW_OK)) {
GST_BUFFER_TIMESTAMP (buf) = runtimestamp;
GST_BUFFER_OFFSET (buf) = GST_CLOCK_TIME_NONE;
GST_BUFFER_OFFSET_END (buf) = GST_CLOCK_TIME_NONE;
}
gst_buffer_unmap (buf, data, size);
return ret;
/* ERRORS */
error_after:
{
GST_ELEMENT_ERROR (identity, CORE, FAILED,
(_("Failed after iterations as requested.")), (NULL));
gst_buffer_unmap (buf, data, size);
return GST_FLOW_ERROR;
}
dropped:
{
if (!identity->silent) {
gst_identity_update_last_message_for_buffer (identity, "dropping", buf,
size);
}
gst_buffer_unmap (buf, data, size);
/* return DROPPED to basetransform. */
return GST_BASE_TRANSFORM_FLOW_DROPPED;
}
}
static void
gst_identity_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstIdentity *identity;
identity = GST_IDENTITY (object);
switch (prop_id) {
case PROP_SLEEP_TIME:
identity->sleep_time = g_value_get_uint (value);
break;
case PROP_SILENT:
identity->silent = g_value_get_boolean (value);
break;
case PROP_SINGLE_SEGMENT:
identity->single_segment = g_value_get_boolean (value);
break;
case PROP_DUMP:
identity->dump = g_value_get_boolean (value);
break;
case PROP_ERROR_AFTER:
identity->error_after = g_value_get_int (value);
break;
case PROP_DROP_PROBABILITY:
identity->drop_probability = g_value_get_float (value);
break;
case PROP_DATARATE:
identity->datarate = g_value_get_int (value);
break;
case PROP_SYNC:
identity->sync = g_value_get_boolean (value);
break;
case PROP_CHECK_PERFECT:
identity->check_perfect = g_value_get_boolean (value);
break;
case PROP_CHECK_IMPERFECT_TIMESTAMP:
identity->check_imperfect_timestamp = g_value_get_boolean (value);
break;
case PROP_CHECK_IMPERFECT_OFFSET:
identity->check_imperfect_offset = g_value_get_boolean (value);
break;
case PROP_SIGNAL_HANDOFFS:
identity->signal_handoffs = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_identity_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstIdentity *identity;
identity = GST_IDENTITY (object);
switch (prop_id) {
case PROP_SLEEP_TIME:
g_value_set_uint (value, identity->sleep_time);
break;
case PROP_ERROR_AFTER:
g_value_set_int (value, identity->error_after);
break;
case PROP_DROP_PROBABILITY:
g_value_set_float (value, identity->drop_probability);
break;
case PROP_DATARATE:
g_value_set_int (value, identity->datarate);
break;
case PROP_SILENT:
g_value_set_boolean (value, identity->silent);
break;
case PROP_SINGLE_SEGMENT:
g_value_set_boolean (value, identity->single_segment);
break;
case PROP_DUMP:
g_value_set_boolean (value, identity->dump);
break;
case PROP_LAST_MESSAGE:
GST_OBJECT_LOCK (identity);
g_value_set_string (value, identity->last_message);
GST_OBJECT_UNLOCK (identity);
break;
case PROP_SYNC:
g_value_set_boolean (value, identity->sync);
break;
case PROP_CHECK_PERFECT:
g_value_set_boolean (value, identity->check_perfect);
break;
case PROP_CHECK_IMPERFECT_TIMESTAMP:
g_value_set_boolean (value, identity->check_imperfect_timestamp);
break;
case PROP_CHECK_IMPERFECT_OFFSET:
g_value_set_boolean (value, identity->check_imperfect_offset);
break;
case PROP_SIGNAL_HANDOFFS:
g_value_set_boolean (value, identity->signal_handoffs);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_identity_start (GstBaseTransform * trans)
{
GstIdentity *identity;
identity = GST_IDENTITY (trans);
identity->offset = 0;
identity->prev_timestamp = GST_CLOCK_TIME_NONE;
identity->prev_duration = GST_CLOCK_TIME_NONE;
identity->prev_offset_end = GST_BUFFER_OFFSET_NONE;
identity->prev_offset = GST_BUFFER_OFFSET_NONE;
return TRUE;
}
static gboolean
gst_identity_stop (GstBaseTransform * trans)
{
GstIdentity *identity;
identity = GST_IDENTITY (trans);
GST_OBJECT_LOCK (identity);
g_free (identity->last_message);
identity->last_message = NULL;
GST_OBJECT_UNLOCK (identity);
return TRUE;
}
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