/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans * 2005 Wim Taymans * * 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., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION:element-identity * @title: identity * * Dummy element that passes incoming data through unmodified. It has some * useful diagnostic functions, such as offset and timestamp checking. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include "gstelements_private.h" #include "../../gst/gst-i18n-lib.h" #include "gstidentity.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_DROP_BUFFER_FLAGS 0 #define DEFAULT_DATARATE 0 #define DEFAULT_SILENT TRUE #define DEFAULT_SINGLE_SEGMENT FALSE #define DEFAULT_DUMP FALSE #define DEFAULT_SYNC FALSE #define DEFAULT_CHECK_IMPERFECT_TIMESTAMP FALSE #define DEFAULT_CHECK_IMPERFECT_OFFSET FALSE #define DEFAULT_SIGNAL_HANDOFFS TRUE #define DEFAULT_TS_OFFSET 0 #define DEFAULT_DROP_ALLOCATION FALSE #define DEFAULT_EOS_AFTER -1 enum { PROP_0, PROP_SLEEP_TIME, PROP_ERROR_AFTER, PROP_DROP_PROBABILITY, PROP_DROP_BUFFER_FLAGS, PROP_DATARATE, PROP_SILENT, PROP_SINGLE_SEGMENT, PROP_LAST_MESSAGE, PROP_DUMP, PROP_SYNC, PROP_TS_OFFSET, PROP_CHECK_IMPERFECT_TIMESTAMP, PROP_CHECK_IMPERFECT_OFFSET, PROP_SIGNAL_HANDOFFS, PROP_DROP_ALLOCATION, PROP_EOS_AFTER }; #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 gboolean gst_identity_start (GstBaseTransform * trans); static gboolean gst_identity_stop (GstBaseTransform * trans); static GstStateChangeReturn gst_identity_change_state (GstElement * element, GstStateChange transition); static gboolean gst_identity_accept_caps (GstBaseTransform * base, GstPadDirection direction, GstCaps * caps); static gboolean gst_identity_query (GstBaseTransform * base, GstPadDirection direction, GstQuery * query); 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); g_cond_clear (&identity->blocked_cond); G_OBJECT_CLASS (parent_class)->finalize (object); } 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)); /** * GstIdentity:drop-buffer-flags: * * Drop buffers with the given flags. * * Since: 1.8 **/ g_object_class_install_property (gobject_class, PROP_DROP_BUFFER_FLAGS, g_param_spec_flags ("drop-buffer-flags", "Check flags to drop buffers", "Drop buffers with the given flags", GST_TYPE_BUFFER_FLAGS, DEFAULT_DROP_BUFFER_FLAGS, 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_TS_OFFSET, g_param_spec_int64 ("ts-offset", "Timestamp offset for synchronisation", "Timestamp offset in nanoseconds for synchronisation, negative for earlier sync", G_MININT64, G_MAXINT64, DEFAULT_TS_OFFSET, 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 emitted, which might improve performance. */ 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)); g_object_class_install_property (gobject_class, PROP_DROP_ALLOCATION, g_param_spec_boolean ("drop-allocation", "Drop allocation query", "Don't forward allocation queries", DEFAULT_DROP_ALLOCATION, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstIdentity:eos-after * * EOS after N buffers. * * Since: 1.16 **/ g_object_class_install_property (gobject_class, PROP_EOS_AFTER, g_param_spec_int ("eos-after", "EOS After", "EOS after N buffers", G_MININT, G_MAXINT, DEFAULT_ERROR_AFTER, 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, g_cclosure_marshal_generic, G_TYPE_NONE, 1, GST_TYPE_BUFFER | G_SIGNAL_TYPE_STATIC_SCOPE); gobject_class->finalize = gst_identity_finalize; gst_element_class_set_static_metadata (gstelement_class, "Identity", "Generic", "Pass data without modification", "Erik Walthinsen "); gst_element_class_add_static_pad_template (gstelement_class, &srctemplate); gst_element_class_add_static_pad_template (gstelement_class, &sinktemplate); gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_identity_change_state); gstbasetrans_class->sink_event = GST_DEBUG_FUNCPTR (gst_identity_sink_event); gstbasetrans_class->transform_ip = GST_DEBUG_FUNCPTR (gst_identity_transform_ip); gstbasetrans_class->start = GST_DEBUG_FUNCPTR (gst_identity_start); gstbasetrans_class->stop = GST_DEBUG_FUNCPTR (gst_identity_stop); gstbasetrans_class->accept_caps = GST_DEBUG_FUNCPTR (gst_identity_accept_caps); gstbasetrans_class->query = gst_identity_query; } 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->drop_buffer_flags = DEFAULT_DROP_BUFFER_FLAGS; identity->datarate = DEFAULT_DATARATE; identity->silent = DEFAULT_SILENT; identity->single_segment = DEFAULT_SINGLE_SEGMENT; identity->sync = DEFAULT_SYNC; 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; identity->ts_offset = DEFAULT_TS_OFFSET; g_cond_init (&identity->blocked_cond); identity->eos_after = DEFAULT_EOS_AFTER; gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM_CAST (identity), TRUE); } static void gst_identity_notify_last_message (GstIdentity * identity) { g_object_notify_by_pspec ((GObject *) identity, pspec_last_message); } static GstFlowReturn gst_identity_do_sync (GstIdentity * identity, GstClockTime running_time) { GstFlowReturn ret = GST_FLOW_OK; if (identity->sync && GST_BASE_TRANSFORM_CAST (identity)->segment.format == GST_FORMAT_TIME) { GstClock *clock; GST_OBJECT_LOCK (identity); if (identity->flushing) { GST_OBJECT_UNLOCK (identity); return GST_FLOW_FLUSHING; } while (identity->blocked) g_cond_wait (&identity->blocked_cond, GST_OBJECT_GET_LOCK (identity)); if (identity->flushing) { GST_OBJECT_UNLOCK (identity); return GST_FLOW_FLUSHING; } if ((clock = GST_ELEMENT (identity)->clock)) { GstClockReturn cret; GstClockTime timestamp; GstClockTimeDiff ts_offset = identity->ts_offset; timestamp = running_time + GST_ELEMENT (identity)->base_time + identity->upstream_latency; if (ts_offset < 0) { ts_offset = -ts_offset; if (ts_offset < timestamp) timestamp -= ts_offset; else timestamp = 0; } else timestamp += ts_offset; /* save id if we need to unlock */ 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 || identity->flushing) ret = GST_FLOW_FLUSHING; } GST_OBJECT_UNLOCK (identity); } return ret; } 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; const gchar *tstr; gchar *sstr; GST_OBJECT_LOCK (identity); g_free (identity->last_message); tstr = gst_event_type_get_name (GST_EVENT_TYPE (event)); 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: %s (%d), %s) %p", GST_DEBUG_PAD_NAME (trans->sinkpad), tstr, 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) { 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, GST_OBJECT_CAST (trans), news); } else { /* need to track segment for proper running time */ gst_event_copy_segment (event, &trans->segment); } } if (GST_EVENT_TYPE (event) == GST_EVENT_GAP && trans->have_segment && trans->segment.format == GST_FORMAT_TIME) { GstClockTime start, dur; gst_event_parse_gap (event, &start, &dur); if (GST_CLOCK_TIME_IS_VALID (start)) { start = gst_segment_to_running_time (&trans->segment, GST_FORMAT_TIME, start); gst_identity_do_sync (identity, start); /* also transform GAP timestamp similar to buffer timestamps */ if (identity->single_segment) { gst_event_unref (event); event = gst_event_new_gap (start, dur); } } } /* Reset previous timestamp, duration and offsets on SEGMENT * 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 { if (GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_START) { GST_OBJECT_LOCK (identity); identity->flushing = TRUE; if (identity->clock_id) { GST_DEBUG_OBJECT (identity, "unlock clock wait"); gst_clock_id_unschedule (identity->clock_id); } GST_OBJECT_UNLOCK (identity); } else if (GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_STOP) { GST_OBJECT_LOCK (identity); identity->flushing = FALSE; GST_OBJECT_UNLOCK (identity); } ret = GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event); } return ret; } 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 * @delta: the GST_CLOCK_DIFF to the prev timestamp * @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", "delta", G_TYPE_INT64, dt, "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 dts_str[64], pts_str[64], dur_str[64]; gchar *flag_str, *meta_str; GST_OBJECT_LOCK (identity); flag_str = gst_buffer_get_flags_string (buf); meta_str = gst_buffer_get_meta_string (buf); g_free (identity->last_message); identity->last_message = g_strdup_printf ("%s ******* (%s:%s) " "(%" G_GSIZE_FORMAT " bytes, dts: %s, pts: %s, duration: %s, offset: %" G_GINT64_FORMAT ", " "offset_end: % " G_GINT64_FORMAT ", flags: %08x %s, meta: %s) %p", action, GST_DEBUG_PAD_NAME (GST_BASE_TRANSFORM_CAST (identity)->sinkpad), size, print_pretty_time (dts_str, sizeof (dts_str), GST_BUFFER_DTS (buf)), print_pretty_time (pts_str, sizeof (pts_str), GST_BUFFER_PTS (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), flag_str, meta_str ? meta_str : "none", buf); g_free (flag_str); 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 rundts = GST_CLOCK_TIME_NONE; GstClockTime runpts = GST_CLOCK_TIME_NONE; GstClockTime ts, duration, runtimestamp; gsize size; size = gst_buffer_get_size (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->eos_after >= 0) { identity->eos_after--; if (identity->eos_after == 0) goto eos_after; } if (identity->drop_probability > 0.0) { if ((gfloat) (1.0 * rand () / (RAND_MAX)) < identity->drop_probability) goto dropped; } if (GST_BUFFER_FLAG_IS_SET (buf, identity->drop_buffer_flags)) goto dropped; if (identity->dump) { GstMapInfo info; if (gst_buffer_map (buf, &info, GST_MAP_READ)) { gst_util_dump_mem (info.data, info.size); gst_buffer_unmap (buf, &info); } } 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_PTS (buf) = GST_BUFFER_DTS (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) { rundts = gst_segment_to_running_time (&trans->segment, GST_FORMAT_TIME, GST_BUFFER_DTS (buf)); runpts = gst_segment_to_running_time (&trans->segment, GST_FORMAT_TIME, GST_BUFFER_PTS (buf)); } if (GST_CLOCK_TIME_IS_VALID (rundts)) runtimestamp = rundts; else if (GST_CLOCK_TIME_IS_VALID (runpts)) runtimestamp = runpts; else runtimestamp = 0; ret = gst_identity_do_sync (identity, runtimestamp); 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_DTS (buf) = rundts; GST_BUFFER_PTS (buf) = runpts; GST_BUFFER_OFFSET (buf) = GST_CLOCK_TIME_NONE; GST_BUFFER_OFFSET_END (buf) = GST_CLOCK_TIME_NONE; } return ret; /* ERRORS */ error_after: { GST_ELEMENT_ERROR (identity, CORE, FAILED, (_("Failed after iterations as requested.")), (NULL)); return GST_FLOW_ERROR; } eos_after: { GST_DEBUG_OBJECT (identity, "EOS after iterations as requested."); return GST_FLOW_EOS; } dropped: { if (!identity->silent) { gst_identity_update_last_message_for_buffer (identity, "dropping", buf, size); } ts = GST_BUFFER_TIMESTAMP (buf); if (GST_CLOCK_TIME_IS_VALID (ts)) { duration = GST_BUFFER_DURATION (buf); gst_pad_push_event (GST_BASE_TRANSFORM_SRC_PAD (identity), gst_event_new_gap (ts, duration)); } /* 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_DROP_BUFFER_FLAGS: identity->drop_buffer_flags = g_value_get_flags (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_TS_OFFSET: identity->ts_offset = g_value_get_int64 (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; case PROP_DROP_ALLOCATION: identity->drop_allocation = g_value_get_boolean (value); break; case PROP_EOS_AFTER: identity->eos_after = g_value_get_int (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } if (identity->datarate > 0 || identity->single_segment) gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (identity), FALSE); else gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (identity), TRUE); } 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_DROP_BUFFER_FLAGS: g_value_set_flags (value, identity->drop_buffer_flags); 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_TS_OFFSET: identity->ts_offset = g_value_get_int64 (value); 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; case PROP_DROP_ALLOCATION: g_value_set_boolean (value, identity->drop_allocation); break; case PROP_EOS_AFTER: g_value_set_int (value, identity->eos_after); 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; } static gboolean gst_identity_accept_caps (GstBaseTransform * base, GstPadDirection direction, GstCaps * caps) { gboolean ret; GstPad *pad; /* Proxy accept-caps */ if (direction == GST_PAD_SRC) pad = GST_BASE_TRANSFORM_SINK_PAD (base); else pad = GST_BASE_TRANSFORM_SRC_PAD (base); ret = gst_pad_peer_query_accept_caps (pad, caps); return ret; } static gboolean gst_identity_query (GstBaseTransform * base, GstPadDirection direction, GstQuery * query) { GstIdentity *identity; gboolean ret; identity = GST_IDENTITY (base); if (GST_QUERY_TYPE (query) == GST_QUERY_ALLOCATION && identity->drop_allocation) { GST_DEBUG_OBJECT (identity, "Dropping allocation query."); return FALSE; } ret = GST_BASE_TRANSFORM_CLASS (parent_class)->query (base, direction, query); if (GST_QUERY_TYPE (query) == GST_QUERY_LATENCY) { gboolean live = FALSE; GstClockTime min = 0, max = 0; if (ret) { gst_query_parse_latency (query, &live, &min, &max); if (identity->sync && max < min) { GST_ELEMENT_WARNING (base, CORE, CLOCK, (NULL), ("Impossible to configure latency before identity sync=true:" " max %" GST_TIME_FORMAT " < min %" GST_TIME_FORMAT ". Add queues or other buffering elements.", GST_TIME_ARGS (max), GST_TIME_ARGS (min))); } } /* Ignore the upstream latency if it is not live */ GST_OBJECT_LOCK (identity); if (live) identity->upstream_latency = min; else identity->upstream_latency = 0; GST_OBJECT_UNLOCK (identity); gst_query_set_latency (query, live || identity->sync, min, max); ret = TRUE; } return ret; } static GstStateChangeReturn gst_identity_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret; GstIdentity *identity = GST_IDENTITY (element); gboolean no_preroll = FALSE; switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: GST_OBJECT_LOCK (identity); identity->flushing = FALSE; identity->blocked = TRUE; GST_OBJECT_UNLOCK (identity); if (identity->sync) no_preroll = TRUE; break; case GST_STATE_CHANGE_PAUSED_TO_PLAYING: GST_OBJECT_LOCK (identity); identity->blocked = FALSE; g_cond_broadcast (&identity->blocked_cond); GST_OBJECT_UNLOCK (identity); break; case GST_STATE_CHANGE_PAUSED_TO_READY: GST_OBJECT_LOCK (identity); identity->flushing = TRUE; if (identity->clock_id) { GST_DEBUG_OBJECT (identity, "unlock clock wait"); gst_clock_id_unschedule (identity->clock_id); } identity->blocked = FALSE; g_cond_broadcast (&identity->blocked_cond); GST_OBJECT_UNLOCK (identity); break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PLAYING_TO_PAUSED: GST_OBJECT_LOCK (identity); identity->upstream_latency = 0; identity->blocked = TRUE; GST_OBJECT_UNLOCK (identity); if (identity->sync) no_preroll = TRUE; break; case GST_STATE_CHANGE_PAUSED_TO_READY: break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } if (no_preroll && ret == GST_STATE_CHANGE_SUCCESS) ret = GST_STATE_CHANGE_NO_PREROLL; return ret; }