/* Generic video aggregator plugin * Copyright (C) 2004, 2008 Wim Taymans * Copyright (C) 2010 Sebastian Dröge * * 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:gstvideoaggregator * @short_description: Base class for video aggregators * * VideoAggregator can accept AYUV, ARGB and BGRA video streams. For each of the requested * sink pads it will compare the incoming geometry and framerate to define the * output parameters. Indeed output video frames will have the geometry of the * biggest incoming video stream and the framerate of the fastest incoming one. * * VideoAggregator will do colorspace conversion. * * Zorder for each input stream can be configured on the * #GstVideoAggregatorPad. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gstvideoaggregator.h" #include "gstvideoaggregatorpad.h" GST_DEBUG_CATEGORY_STATIC (gst_videoaggregator_debug); #define GST_CAT_DEFAULT gst_videoaggregator_debug /* Needed prototypes */ static void gst_videoaggregator_reset_qos (GstVideoAggregator * vagg); /**************************************** * GstVideoAggregatorPad implementation * ****************************************/ #define DEFAULT_PAD_ZORDER 0 enum { PROP_PAD_0, PROP_PAD_ZORDER, }; struct _GstVideoAggregatorPadPrivate { /* Converter, if NULL no conversion is done */ GstVideoConverter *convert; /* caps used for conversion if needed */ GstVideoInfo conversion_info; GstBuffer *converted_buffer; }; G_DEFINE_TYPE (GstVideoAggregatorPad, gst_videoaggregator_pad, GST_TYPE_AGGREGATOR_PAD); static void gst_videoaggregator_pad_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (object); switch (prop_id) { case PROP_PAD_ZORDER: g_value_set_uint (value, pad->zorder); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static int pad_zorder_compare (const GstVideoAggregatorPad * pad1, const GstVideoAggregatorPad * pad2) { return pad1->zorder - pad2->zorder; } static void gst_videoaggregator_pad_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (object); GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (gst_pad_get_parent (GST_PAD (pad))); switch (prop_id) { case PROP_PAD_ZORDER: GST_OBJECT_LOCK (vagg); pad->zorder = g_value_get_uint (value); GST_ELEMENT (vagg)->sinkpads = g_list_sort (GST_ELEMENT (vagg)->sinkpads, (GCompareFunc) pad_zorder_compare); GST_OBJECT_UNLOCK (vagg); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } gst_object_unref (vagg); } static gboolean _flush_pad (GstAggregatorPad * aggpad, GstAggregator * aggregator) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (aggregator); GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (aggpad); gst_videoaggregator_reset_qos (vagg); gst_buffer_replace (&pad->buffer, NULL); pad->start_time = -1; pad->end_time = -1; return TRUE; } static gboolean gst_video_aggregator_pad_set_info (GstVideoAggregatorPad * pad, GstVideoAggregator * vagg G_GNUC_UNUSED, GstVideoInfo * current_info, GstVideoInfo * wanted_info) { gchar *colorimetry, *best_colorimetry; const gchar *chroma, *best_chroma; if (!current_info->finfo) return TRUE; if (GST_VIDEO_INFO_FORMAT (current_info) == GST_VIDEO_FORMAT_UNKNOWN) return TRUE; if (pad->priv->convert) gst_video_converter_free (pad->priv->convert); pad->priv->convert = NULL; colorimetry = gst_video_colorimetry_to_string (&(current_info->colorimetry)); chroma = gst_video_chroma_to_string (current_info->chroma_site); best_colorimetry = gst_video_colorimetry_to_string (&(wanted_info->colorimetry)); best_chroma = gst_video_chroma_to_string (wanted_info->chroma_site); if (GST_VIDEO_INFO_FORMAT (wanted_info) != GST_VIDEO_INFO_FORMAT (current_info) || g_strcmp0 (colorimetry, best_colorimetry) || g_strcmp0 (chroma, best_chroma)) { GstVideoInfo tmp_info; /* Initialize with the wanted video format and our original width and * height as we don't want to rescale. Then copy over the wanted * colorimetry, and chroma-site and our current pixel-aspect-ratio * and other relevant fields. */ gst_video_info_set_format (&tmp_info, GST_VIDEO_INFO_FORMAT (wanted_info), current_info->width, current_info->height); tmp_info.chroma_site = wanted_info->chroma_site; tmp_info.colorimetry = wanted_info->colorimetry; tmp_info.par_n = current_info->par_n; tmp_info.par_d = current_info->par_d; tmp_info.fps_n = current_info->fps_n; tmp_info.fps_d = current_info->fps_d; tmp_info.flags = current_info->flags; tmp_info.interlace_mode = current_info->interlace_mode; GST_DEBUG_OBJECT (pad, "This pad will be converted from %d to %d", GST_VIDEO_INFO_FORMAT (current_info), GST_VIDEO_INFO_FORMAT (&tmp_info)); pad->priv->convert = gst_video_converter_new (current_info, &tmp_info, NULL); pad->priv->conversion_info = tmp_info; if (!pad->priv->convert) { g_free (colorimetry); g_free (best_colorimetry); GST_WARNING_OBJECT (pad, "No path found for conversion"); return FALSE; } } else { GST_DEBUG_OBJECT (pad, "This pad will not need conversion"); } g_free (colorimetry); g_free (best_colorimetry); return TRUE; } static void gst_videoaggregator_pad_finalize (GObject * o) { GstVideoAggregatorPad *vaggpad = GST_VIDEO_AGGREGATOR_PAD (o); if (vaggpad->priv->convert) gst_video_converter_free (vaggpad->priv->convert); vaggpad->priv->convert = NULL; G_OBJECT_CLASS (gst_videoaggregator_pad_parent_class)->finalize (o); } static gboolean gst_video_aggregator_pad_prepare_frame (GstVideoAggregatorPad * pad, GstVideoAggregator * vagg) { guint outsize; GstVideoFrame *converted_frame; GstBuffer *converted_buf = NULL; GstVideoFrame *frame = g_slice_new0 (GstVideoFrame); static GstAllocationParams params = { 0, 15, 0, 0, }; if (!gst_video_frame_map (frame, &pad->buffer_vinfo, pad->buffer, GST_MAP_READ)) { GST_WARNING_OBJECT (vagg, "Could not map input buffer"); } if (pad->priv->convert) { gint converted_size; converted_frame = g_slice_new0 (GstVideoFrame); /* We wait until here to set the conversion infos, in case vagg->info changed */ converted_size = pad->priv->conversion_info.size; outsize = GST_VIDEO_INFO_SIZE (&vagg->info); converted_size = converted_size > outsize ? converted_size : outsize; converted_buf = gst_buffer_new_allocate (NULL, converted_size, ¶ms); if (!gst_video_frame_map (converted_frame, &(pad->priv->conversion_info), converted_buf, GST_MAP_READWRITE)) { GST_WARNING_OBJECT (vagg, "Could not map converted frame"); g_slice_free (GstVideoFrame, converted_frame); gst_video_frame_unmap (frame); g_slice_free (GstVideoFrame, frame); return FALSE; } gst_video_converter_frame (pad->priv->convert, frame, converted_frame); pad->priv->converted_buffer = converted_buf; gst_video_frame_unmap (frame); g_slice_free (GstVideoFrame, frame); } else { converted_frame = frame; } pad->aggregated_frame = converted_frame; return TRUE; } static void gst_video_aggregator_pad_clean_frame (GstVideoAggregatorPad * pad, GstVideoAggregator * vagg) { if (pad->aggregated_frame) { gst_video_frame_unmap (pad->aggregated_frame); g_slice_free (GstVideoFrame, pad->aggregated_frame); pad->aggregated_frame = NULL; } if (pad->priv->converted_buffer) { gst_buffer_unref (pad->priv->converted_buffer); pad->priv->converted_buffer = NULL; } } static void gst_videoaggregator_pad_class_init (GstVideoAggregatorPadClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GstAggregatorPadClass *aggpadclass = (GstAggregatorPadClass *) klass; gobject_class->set_property = gst_videoaggregator_pad_set_property; gobject_class->get_property = gst_videoaggregator_pad_get_property; gobject_class->finalize = gst_videoaggregator_pad_finalize; g_object_class_install_property (gobject_class, PROP_PAD_ZORDER, g_param_spec_uint ("zorder", "Z-Order", "Z Order of the picture", 0, 10000, DEFAULT_PAD_ZORDER, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_type_class_add_private (klass, sizeof (GstVideoAggregatorPadPrivate)); aggpadclass->flush = GST_DEBUG_FUNCPTR (_flush_pad); klass->set_info = GST_DEBUG_FUNCPTR (gst_video_aggregator_pad_set_info); klass->prepare_frame = GST_DEBUG_FUNCPTR (gst_video_aggregator_pad_prepare_frame); klass->clean_frame = GST_DEBUG_FUNCPTR (gst_video_aggregator_pad_clean_frame); } static void gst_videoaggregator_pad_init (GstVideoAggregatorPad * vaggpad) { vaggpad->priv = G_TYPE_INSTANCE_GET_PRIVATE (vaggpad, GST_TYPE_VIDEO_AGGREGATOR_PAD, GstVideoAggregatorPadPrivate); vaggpad->zorder = DEFAULT_PAD_ZORDER; vaggpad->aggregated_frame = NULL; vaggpad->priv->converted_buffer = NULL; vaggpad->priv->convert = NULL; } /********************************* * GstChildProxy implementation * *********************************/ static GObject * gst_videoaggregator_child_proxy_get_child_by_index (GstChildProxy * child_proxy, guint index) { GObject *obj; GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (child_proxy); GST_OBJECT_LOCK (vagg); if ((obj = g_list_nth_data (GST_ELEMENT (vagg)->sinkpads, index))) g_object_ref (obj); GST_OBJECT_UNLOCK (vagg); return obj; } static guint gst_videoaggregator_child_proxy_get_children_count (GstChildProxy * child_proxy) { guint count = 0; GST_OBJECT_LOCK (child_proxy); count = GST_ELEMENT (child_proxy)->numsinkpads; GST_OBJECT_UNLOCK (child_proxy); GST_INFO_OBJECT (child_proxy, "Children Count: %d", count); return count; } static void gst_videoaggregator_child_proxy_init (gpointer g_iface, gpointer iface_data) { GstChildProxyInterface *iface = g_iface; GST_INFO ("intializing child proxy interface"); iface->get_child_by_index = gst_videoaggregator_child_proxy_get_child_by_index; iface->get_children_count = gst_videoaggregator_child_proxy_get_children_count; } /************************************** * GstVideoAggregator implementation * **************************************/ #define GST_VIDEO_AGGREGATOR_GET_LOCK(vagg) (&GST_VIDEO_AGGREGATOR(vagg)->priv->lock) #define GST_VIDEO_AGGREGATOR_LOCK(vagg) G_STMT_START { \ GST_LOG_OBJECT (vagg, "Taking EVENT lock from thread %p", \ g_thread_self()); \ g_mutex_lock(GST_VIDEO_AGGREGATOR_GET_LOCK(vagg)); \ GST_LOG_OBJECT (vagg, "Took EVENT lock from thread %p", \ g_thread_self()); \ } G_STMT_END #define GST_VIDEO_AGGREGATOR_UNLOCK(vagg) G_STMT_START { \ GST_LOG_OBJECT (vagg, "Releasing EVENT lock from thread %p", \ g_thread_self()); \ g_mutex_unlock(GST_VIDEO_AGGREGATOR_GET_LOCK(vagg)); \ GST_LOG_OBJECT (vagg, "Took EVENT lock from thread %p", \ g_thread_self()); \ } G_STMT_END struct _GstVideoAggregatorPrivate { /* Lock to prevent the state to change while aggregating */ GMutex lock; /* Current downstream segment */ GstClockTime ts_offset; guint64 nframes; /* QoS stuff */ gdouble proportion; GstClockTime earliest_time; guint64 qos_processed, qos_dropped; /* current caps */ GstCaps *current_caps; }; G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GstVideoAggregator, gst_videoaggregator, GST_TYPE_AGGREGATOR, G_IMPLEMENT_INTERFACE (GST_TYPE_CHILD_PROXY, gst_videoaggregator_child_proxy_init)); static void gst_videoaggreagator_find_best_format (GstVideoAggregator * vagg, GstCaps * downstream_caps, GstVideoInfo * best_info, gboolean * at_least_one_alpha) { GList *tmp; GstCaps *possible_caps; GstVideoAggregatorPad *pad; gboolean need_alpha = FALSE; gint best_format_number = 0; GHashTable *formats_table = g_hash_table_new (g_direct_hash, g_direct_equal); GST_OBJECT_LOCK (vagg); for (tmp = GST_ELEMENT (vagg)->sinkpads; tmp; tmp = tmp->next) { GstStructure *s; gint format_number; pad = tmp->data; if (!pad->info.finfo) continue; if (pad->info.finfo->flags & GST_VIDEO_FORMAT_FLAG_ALPHA) *at_least_one_alpha = TRUE; /* If we want alpha, disregard all the other formats */ if (need_alpha && !(pad->info.finfo->flags & GST_VIDEO_FORMAT_FLAG_ALPHA)) continue; /* This can happen if we release a pad and another pad hasn't been negotiated_caps yet */ if (GST_VIDEO_INFO_FORMAT (&pad->info) == GST_VIDEO_FORMAT_UNKNOWN) continue; possible_caps = gst_video_info_to_caps (&pad->info); s = gst_caps_get_structure (possible_caps, 0); gst_structure_remove_fields (s, "width", "height", "framerate", "pixel-aspect-ratio", "interlace-mode", NULL); /* Can downstream accept this format ? */ if (!gst_caps_can_intersect (downstream_caps, possible_caps)) { gst_caps_unref (possible_caps); continue; } gst_caps_unref (possible_caps); format_number = GPOINTER_TO_INT (g_hash_table_lookup (formats_table, GINT_TO_POINTER (GST_VIDEO_INFO_FORMAT (&pad->info)))); format_number += 1; g_hash_table_replace (formats_table, GINT_TO_POINTER (GST_VIDEO_INFO_FORMAT (&pad->info)), GINT_TO_POINTER (format_number)); /* If that pad is the first with alpha, set it as the new best format */ if (!need_alpha && (pad->info.finfo->flags & GST_VIDEO_FORMAT_FLAG_ALPHA)) { need_alpha = TRUE; *best_info = pad->info; best_format_number = format_number; } else if (format_number > best_format_number) { *best_info = pad->info; best_format_number = format_number; } } GST_OBJECT_UNLOCK (vagg); g_hash_table_unref (formats_table); } /* WITH GST_VIDEO_AGGREGATOR_LOCK TAKEN * NOTE: After calling that method you **have to** call * gst_videoaggregator_update_src_caps (without releasing * the GST_VIDEO_AGGREGATOR_LOCK in between) */ static gboolean gst_videoaggregator_update_converters (GstVideoAggregator * vagg) { GList *tmp; GstVideoFormat best_format; GstVideoInfo best_info; gboolean at_least_one_alpha = FALSE; GstCaps *downstream_caps; GstAggregator *agg = GST_AGGREGATOR (vagg); GstVideoAggregatorClass *vagg_class = GST_VIDEO_AGGREGATOR_GET_CLASS (vagg); GstVideoAggregatorPadClass *vaggpad_class = g_type_class_peek (GST_AGGREGATOR_GET_CLASS (vagg)->sinkpads_type); best_format = GST_VIDEO_FORMAT_UNKNOWN; gst_video_info_init (&best_info); downstream_caps = gst_pad_get_allowed_caps (agg->srcpad); if (!downstream_caps || gst_caps_is_empty (downstream_caps)) { GST_INFO_OBJECT (vagg, "No downstream caps found %" GST_PTR_FORMAT, downstream_caps); if (downstream_caps) gst_caps_unref (downstream_caps); return FALSE; } if (vagg_class->find_best_format) { vagg_class->find_best_format (vagg, downstream_caps, &best_info, &at_least_one_alpha); best_format = GST_VIDEO_INFO_FORMAT (&best_info); } if (best_format == GST_VIDEO_FORMAT_UNKNOWN) { downstream_caps = gst_caps_fixate (downstream_caps); gst_video_info_from_caps (&best_info, downstream_caps); best_format = GST_VIDEO_INFO_FORMAT (&best_info); } gst_caps_unref (downstream_caps); if (at_least_one_alpha && !(best_info.finfo->flags & GST_VIDEO_FORMAT_FLAG_ALPHA)) { GST_ELEMENT_ERROR (vagg, CORE, NEGOTIATION, ("At least one of the input pads contains alpha, but downstream can't support alpha."), ("Either convert your inputs to not contain alpha or add a videoconvert after the aggregator")); return FALSE; } vagg->info = best_info; GST_DEBUG_OBJECT (vagg, "The output format will now be : %d with chroma : %s", best_format, gst_video_chroma_to_string (best_info.chroma_site)); if (vaggpad_class->set_info) { GST_OBJECT_LOCK (vagg); /* Then browse the sinks once more, setting or unsetting conversion if needed */ for (tmp = GST_ELEMENT (vagg)->sinkpads; tmp; tmp = tmp->next) { GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (tmp->data); if (!vaggpad_class->set_info (pad, vagg, &pad->info, &best_info)) { GST_OBJECT_UNLOCK (vagg); return FALSE; } } GST_OBJECT_UNLOCK (vagg); } return TRUE; } /* WITH GST_VIDEO_AGGREGATOR_LOCK TAKEN */ static gboolean gst_videoaggregator_src_setcaps (GstVideoAggregator * vagg, GstCaps * caps) { GstAggregator *agg = GST_AGGREGATOR (vagg); gboolean ret = FALSE; GstVideoInfo info; GstPad *pad = GST_AGGREGATOR (vagg)->srcpad; GST_INFO_OBJECT (pad, "set src caps: %" GST_PTR_FORMAT, caps); if (!gst_video_info_from_caps (&info, caps)) goto done; ret = TRUE; if (GST_VIDEO_INFO_FPS_N (&vagg->info) != GST_VIDEO_INFO_FPS_N (&info) || GST_VIDEO_INFO_FPS_D (&vagg->info) != GST_VIDEO_INFO_FPS_D (&info)) { if (agg->segment.position != -1) { vagg->priv->ts_offset = agg->segment.position - agg->segment.start; vagg->priv->nframes = 0; } gst_videoaggregator_reset_qos (vagg); } vagg->info = info; if (vagg->priv->current_caps == NULL || gst_caps_is_equal (caps, vagg->priv->current_caps) == FALSE) { gst_caps_replace (&vagg->priv->current_caps, caps); GST_VIDEO_AGGREGATOR_UNLOCK (vagg); gst_aggregator_set_src_caps (agg, caps); GST_VIDEO_AGGREGATOR_LOCK (vagg); } done: return ret; } /* WITH GST_VIDEO_AGGREGATOR_LOCK TAKEN */ static gboolean gst_videoaggregator_update_src_caps (GstVideoAggregator * vagg) { GList *l; gint best_width = -1, best_height = -1; gdouble best_fps = -1, cur_fps; gint best_fps_n = -1, best_fps_d = -1; gboolean ret = TRUE; GstElementClass *klass = GST_ELEMENT_GET_CLASS (vagg); GstVideoAggregatorClass *vagg_klass = (GstVideoAggregatorClass *) klass; GstAggregator *agg = GST_AGGREGATOR (vagg); GST_OBJECT_LOCK (vagg); for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) { GstVideoAggregatorPad *mpad = l->data; gint this_width, this_height; gint fps_n, fps_d; gint width, height; fps_n = GST_VIDEO_INFO_FPS_N (&mpad->info); fps_d = GST_VIDEO_INFO_FPS_D (&mpad->info); width = GST_VIDEO_INFO_WIDTH (&mpad->info); height = GST_VIDEO_INFO_HEIGHT (&mpad->info); if (width == 0 || height == 0) continue; this_width = width; this_height = height; if (best_width < this_width) best_width = this_width; if (best_height < this_height) best_height = this_height; if (fps_d == 0) cur_fps = 0.0; else gst_util_fraction_to_double (fps_n, fps_d, &cur_fps); if (best_fps < cur_fps) { best_fps = cur_fps; best_fps_n = fps_n; best_fps_d = fps_d; } } GST_OBJECT_UNLOCK (vagg); if (best_fps_n <= 0 || best_fps_d <= 0 || best_fps == 0.0) { best_fps_n = 25; best_fps_d = 1; best_fps = 25.0; } if (best_width > 0 && best_height > 0 && best_fps > 0) { GstCaps *caps, *peercaps, *info_caps; GstStructure *s; GstVideoInfo info; if (GST_VIDEO_INFO_FPS_N (&vagg->info) != best_fps_n || GST_VIDEO_INFO_FPS_D (&vagg->info) != best_fps_d) { if (agg->segment.position != -1) { vagg->priv->ts_offset = agg->segment.position - agg->segment.start; vagg->priv->nframes = 0; } } /* Initialize the video info with our target format and * the best width and height and framerate. Then copy over * all other fields as we negotiated them before */ gst_video_info_set_format (&info, GST_VIDEO_INFO_FORMAT (&vagg->info), best_width, best_height); info.fps_n = best_fps_n; info.fps_d = best_fps_d; info.chroma_site = vagg->info.chroma_site; info.par_n = vagg->info.par_n; info.par_d = vagg->info.par_d; info.colorimetry = vagg->info.colorimetry; info.flags = vagg->info.flags; info.interlace_mode = vagg->info.interlace_mode; info_caps = gst_video_info_to_caps (&info); if (vagg_klass->update_caps) { if (!(caps = vagg_klass->update_caps (vagg, info_caps))) { gst_caps_unref (info_caps); ret = FALSE; goto done; } gst_caps_unref (info_caps); } else { caps = info_caps; } peercaps = gst_pad_peer_query_caps (agg->srcpad, NULL); if (peercaps) { GstCaps *tmp; int i; s = gst_caps_get_structure (caps, 0); gst_structure_get (s, "width", G_TYPE_INT, &best_width, "height", G_TYPE_INT, &best_height, NULL); for (i = 0; i < gst_caps_get_size (caps); i++) { s = gst_caps_get_structure (caps, i); gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT, "height", GST_TYPE_INT_RANGE, 1, G_MAXINT, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL); } tmp = gst_caps_intersect (caps, peercaps); GST_DEBUG_OBJECT (vagg, "intersecting %" GST_PTR_FORMAT " with peer caps %" GST_PTR_FORMAT " result %" GST_PTR_FORMAT, caps, peercaps, tmp); gst_caps_unref (caps); gst_caps_unref (peercaps); caps = tmp; if (gst_caps_is_empty (caps)) { GST_DEBUG_OBJECT (vagg, "empty caps"); ret = FALSE; goto done; } caps = gst_caps_truncate (caps); s = gst_caps_get_structure (caps, 0); gst_structure_fixate_field_nearest_int (s, "width", best_width); gst_structure_fixate_field_nearest_int (s, "height", best_height); gst_structure_fixate_field_nearest_fraction (s, "framerate", best_fps_n, best_fps_d); /* fixate the the rest of the fields */ caps = gst_caps_fixate (caps); gst_structure_get_int (s, "width", &info.width); gst_structure_get_int (s, "height", &info.height); gst_structure_get_fraction (s, "framerate", &info.fps_n, &info.fps_d); } if (gst_videoaggregator_src_setcaps (vagg, caps)) { if (vagg_klass->negotiated_caps) ret = GST_VIDEO_AGGREGATOR_GET_CLASS (vagg)->negotiated_caps (vagg, caps); } gst_caps_unref (caps); } done: return ret; } static gboolean gst_videoaggregator_pad_sink_setcaps (GstPad * pad, GstObject * parent, GstCaps * caps) { GstVideoAggregator *vagg; GstVideoAggregatorPad *vaggpad; GstVideoInfo info; gboolean ret = FALSE; GST_INFO_OBJECT (pad, "Setting caps %" GST_PTR_FORMAT, caps); vagg = GST_VIDEO_AGGREGATOR (parent); vaggpad = GST_VIDEO_AGGREGATOR_PAD (pad); if (!gst_video_info_from_caps (&info, caps)) { GST_DEBUG_OBJECT (pad, "Failed to parse caps"); goto beach; } GST_VIDEO_AGGREGATOR_LOCK (vagg); if (GST_VIDEO_INFO_FORMAT (&vagg->info) != GST_VIDEO_FORMAT_UNKNOWN) { if (GST_VIDEO_INFO_PAR_N (&vagg->info) != GST_VIDEO_INFO_PAR_N (&info) || GST_VIDEO_INFO_PAR_D (&vagg->info) != GST_VIDEO_INFO_PAR_D (&info) || GST_VIDEO_INFO_INTERLACE_MODE (&vagg->info) != GST_VIDEO_INFO_INTERLACE_MODE (&info)) { GST_ERROR_OBJECT (pad, "got input caps %" GST_PTR_FORMAT ", but " "current caps are %" GST_PTR_FORMAT, caps, vagg->priv->current_caps); GST_VIDEO_AGGREGATOR_UNLOCK (vagg); return FALSE; } } vaggpad->info = info; gst_pad_mark_reconfigure (vagg->aggregator.srcpad); ret = TRUE; GST_VIDEO_AGGREGATOR_UNLOCK (vagg); beach: return ret; } static GstCaps * gst_videoaggregator_pad_sink_getcaps (GstPad * pad, GstVideoAggregator * vagg, GstCaps * filter) { GstCaps *srccaps; GstCaps *template_caps; GstCaps *filtered_caps; GstCaps *returned_caps; GstStructure *s; gboolean had_current_caps = TRUE; gint i, n; GstAggregator *agg = GST_AGGREGATOR (vagg); template_caps = gst_pad_get_pad_template_caps (GST_PAD (agg->srcpad)); srccaps = gst_pad_get_current_caps (GST_PAD (agg->srcpad)); if (srccaps == NULL) { had_current_caps = FALSE; srccaps = template_caps; } srccaps = gst_caps_make_writable (srccaps); n = gst_caps_get_size (srccaps); for (i = 0; i < n; i++) { s = gst_caps_get_structure (srccaps, i); gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT, "height", GST_TYPE_INT_RANGE, 1, G_MAXINT, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL); if (!gst_structure_has_field (s, "pixel-aspect-ratio")) gst_structure_set (s, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1, NULL); gst_structure_remove_fields (s, "colorimetry", "chroma-site", "format", NULL); } filtered_caps = srccaps; if (filter) filtered_caps = gst_caps_intersect (srccaps, filter); returned_caps = gst_caps_intersect (filtered_caps, template_caps); gst_caps_unref (srccaps); if (filter) gst_caps_unref (filtered_caps); if (had_current_caps) gst_caps_unref (template_caps); return returned_caps; } static void gst_videoaggregator_update_qos (GstVideoAggregator * vagg, gdouble proportion, GstClockTimeDiff diff, GstClockTime timestamp) { gboolean live; GST_DEBUG_OBJECT (vagg, "Updating QoS: proportion %lf, diff %s%" GST_TIME_FORMAT ", timestamp %" GST_TIME_FORMAT, proportion, (diff < 0) ? "-" : "", GST_TIME_ARGS (ABS (diff)), GST_TIME_ARGS (timestamp)); GST_OBJECT_LOCK (vagg); gst_aggregator_get_latency (GST_AGGREGATOR (vagg), &live, NULL, NULL); vagg->priv->proportion = proportion; if (G_LIKELY (timestamp != GST_CLOCK_TIME_NONE)) { if (!live && G_UNLIKELY (diff > 0)) vagg->priv->earliest_time = timestamp + 2 * diff + gst_util_uint64_scale_int_round (GST_SECOND, GST_VIDEO_INFO_FPS_D (&vagg->info), GST_VIDEO_INFO_FPS_N (&vagg->info)); else vagg->priv->earliest_time = timestamp + diff; } else { vagg->priv->earliest_time = GST_CLOCK_TIME_NONE; } GST_OBJECT_UNLOCK (vagg); } static void gst_videoaggregator_reset_qos (GstVideoAggregator * vagg) { gst_videoaggregator_update_qos (vagg, 0.5, 0, GST_CLOCK_TIME_NONE); vagg->priv->qos_processed = vagg->priv->qos_dropped = 0; } static void gst_videoaggregator_read_qos (GstVideoAggregator * vagg, gdouble * proportion, GstClockTime * time) { GST_OBJECT_LOCK (vagg); *proportion = vagg->priv->proportion; *time = vagg->priv->earliest_time; GST_OBJECT_UNLOCK (vagg); } static void gst_videoaggregator_reset (GstVideoAggregator * vagg) { GstAggregator *agg = GST_AGGREGATOR (vagg); GList *l; gst_video_info_init (&vagg->info); vagg->priv->ts_offset = 0; vagg->priv->nframes = 0; agg->segment.position = -1; gst_videoaggregator_reset_qos (vagg); GST_OBJECT_LOCK (vagg); for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) { GstVideoAggregatorPad *p = l->data; gst_buffer_replace (&p->buffer, NULL); p->start_time = -1; p->end_time = -1; gst_video_info_init (&p->info); } GST_OBJECT_UNLOCK (vagg); } #define GST_FLOW_NEEDS_DATA GST_FLOW_CUSTOM_ERROR static gint gst_videoaggregator_fill_queues (GstVideoAggregator * vagg, GstClockTime output_start_time, GstClockTime output_end_time) { GstAggregator *agg = GST_AGGREGATOR (vagg); GList *l; gboolean eos = TRUE; gboolean need_more_data = FALSE; /* get a set of buffers into pad->buffer that are within output_start_time * and output_end_time taking into account finished and unresponsive pads */ GST_OBJECT_LOCK (vagg); for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) { GstVideoAggregatorPad *pad = l->data; GstSegment *segment; GstAggregatorPad *bpad; GstBuffer *buf; GstVideoInfo *vinfo; gboolean is_eos; bpad = GST_AGGREGATOR_PAD (pad); segment = &bpad->segment; is_eos = bpad->eos; if (!is_eos) eos = FALSE; buf = gst_aggregator_pad_get_buffer (bpad); if (buf) { GstClockTime start_time, end_time; start_time = GST_BUFFER_TIMESTAMP (buf); if (start_time == -1) { gst_buffer_unref (buf); GST_DEBUG_OBJECT (pad, "Need timestamped buffers!"); GST_OBJECT_UNLOCK (vagg); return GST_FLOW_ERROR; } vinfo = &pad->info; /* FIXME: Make all this work with negative rates */ if ((start_time < GST_BUFFER_TIMESTAMP (buf)) || (pad->buffer && start_time < GST_BUFFER_TIMESTAMP (pad->buffer))) { GST_DEBUG_OBJECT (pad, "Buffer from the past, dropping"); gst_buffer_unref (buf); buf = gst_aggregator_pad_steal_buffer (bpad); gst_buffer_unref (buf); need_more_data = TRUE; continue; } end_time = GST_BUFFER_DURATION (buf); if (end_time == -1) { gst_buffer_unref (buf); buf = gst_aggregator_pad_steal_buffer (bpad); gst_buffer_replace (&pad->buffer, buf); gst_buffer_unref (buf); GST_DEBUG_OBJECT (pad, "buffer duration is -1"); continue; } g_assert (start_time != -1 && end_time != -1); end_time += start_time; /* convert from duration to position */ /* Check if it's inside the segment */ if (start_time >= segment->stop || end_time < segment->start) { GST_DEBUG_OBJECT (pad, "Buffer outside the segment : segment: [%" GST_TIME_FORMAT " -- %" GST_TIME_FORMAT "]" " Buffer [%" GST_TIME_FORMAT " -- %" GST_TIME_FORMAT "]", GST_TIME_ARGS (segment->stop), GST_TIME_ARGS (segment->start), GST_TIME_ARGS (start_time), GST_TIME_ARGS (end_time)); gst_buffer_unref (buf); buf = gst_aggregator_pad_steal_buffer (bpad); gst_buffer_unref (buf); need_more_data = TRUE; continue; } /* Clip to segment and convert to running time */ start_time = MAX (start_time, segment->start); if (segment->stop != -1) end_time = MIN (end_time, segment->stop); start_time = gst_segment_to_running_time (segment, GST_FORMAT_TIME, start_time); end_time = gst_segment_to_running_time (segment, GST_FORMAT_TIME, end_time); g_assert (start_time != -1 && end_time != -1); /* Convert to the output segment rate */ if (ABS (agg->segment.rate) != 1.0) { start_time *= ABS (agg->segment.rate); end_time *= ABS (agg->segment.rate); } if (pad->end_time != -1 && pad->end_time > end_time && !bpad->unresponsive) { GST_DEBUG_OBJECT (pad, "Buffer from the past, dropping"); gst_buffer_unref (buf); buf = gst_aggregator_pad_steal_buffer (bpad); gst_buffer_unref (buf); need_more_data = TRUE; continue; } if (end_time >= output_start_time && start_time < output_end_time) { GST_DEBUG_OBJECT (pad, "Taking new buffer with start time %" GST_TIME_FORMAT, GST_TIME_ARGS (start_time)); gst_buffer_replace (&pad->buffer, buf); pad->buffer_vinfo = *vinfo; pad->start_time = start_time; pad->end_time = end_time; gst_buffer_unref (buf); buf = gst_aggregator_pad_steal_buffer (bpad); if (buf) gst_buffer_unref (buf); eos = FALSE; } else if (start_time >= output_end_time) { GST_DEBUG_OBJECT (pad, "Keeping buffer until %" GST_TIME_FORMAT, GST_TIME_ARGS (start_time)); gst_buffer_unref (buf); eos = FALSE; } else { GST_DEBUG_OBJECT (pad, "Too old buffer -- dropping start %" GST_TIME_FORMAT " out end %" GST_TIME_FORMAT, GST_TIME_ARGS (start_time), GST_TIME_ARGS (output_end_time)); gst_buffer_unref (buf); buf = gst_aggregator_pad_steal_buffer (bpad); if (buf) gst_buffer_unref (buf); need_more_data = TRUE; continue; } } else { if (!bpad->unresponsive && pad->end_time != -1) { if (pad->end_time <= output_start_time) { pad->start_time = pad->end_time = -1; if (is_eos) { GST_DEBUG ("I just need more data"); need_more_data = TRUE; } } else if (is_eos) { eos = FALSE; } } else if (is_eos) { gst_buffer_replace (&pad->buffer, NULL); } } } GST_OBJECT_UNLOCK (vagg); if (need_more_data) return GST_FLOW_NEEDS_DATA; if (eos) return GST_FLOW_EOS; return GST_FLOW_OK; } static gboolean prepare_frames (GstVideoAggregator * vagg, GstVideoAggregatorPad * pad) { GstAggregatorPad *bpad = GST_AGGREGATOR_PAD (pad); GstVideoAggregatorPadClass *vaggpad_class = GST_VIDEO_AGGREGATOR_PAD_GET_CLASS (pad); if (pad->buffer != NULL) { GstClockTime timestamp; gint64 stream_time; GstSegment *seg; seg = &bpad->segment; timestamp = GST_BUFFER_TIMESTAMP (pad->buffer); stream_time = gst_segment_to_stream_time (seg, GST_FORMAT_TIME, timestamp); /* sync object properties on stream time */ if (GST_CLOCK_TIME_IS_VALID (stream_time)) gst_object_sync_values (GST_OBJECT (pad), stream_time); if (vaggpad_class->prepare_frame) { return vaggpad_class->prepare_frame (pad, vagg); } } return TRUE; } static gboolean clean_pad (GstVideoAggregator * vagg, GstVideoAggregatorPad * pad) { GstVideoAggregatorPadClass *vaggpad_class = GST_VIDEO_AGGREGATOR_PAD_GET_CLASS (pad); vaggpad_class->clean_frame (pad, vagg); return TRUE; } static GstFlowReturn gst_videoaggregator_do_aggregate (GstVideoAggregator * vagg, GstClockTime output_start_time, GstClockTime output_end_time, GstBuffer ** outbuf) { GstFlowReturn ret = GST_FLOW_OK; GstElementClass *klass = GST_ELEMENT_GET_CLASS (vagg); GstVideoAggregatorClass *vagg_klass = (GstVideoAggregatorClass *) klass; GstVideoAggregatorPadClass *vaggpad_class = g_type_class_peek (GST_AGGREGATOR_CLASS (klass)->sinkpads_type); g_assert (vagg_klass->aggregate_frames != NULL); g_assert (vagg_klass->get_output_buffer != NULL); if ((ret = vagg_klass->get_output_buffer (vagg, outbuf)) != GST_FLOW_OK) { GST_WARNING_OBJECT (vagg, "Could not get an output buffer, reason: %s", gst_flow_get_name (ret)); return ret; } GST_BUFFER_TIMESTAMP (*outbuf) = output_start_time; GST_BUFFER_DURATION (*outbuf) = output_end_time - output_start_time; /* Here we convert all the frames the subclass will have to aggregate * and also sync pad properties to the stream time */ gst_aggregator_iterate_sinkpads (GST_AGGREGATOR (vagg), (GstAggregatorPadForeachFunc) prepare_frames, NULL); ret = vagg_klass->aggregate_frames (vagg, *outbuf); if (vaggpad_class->clean_frame) { gst_aggregator_iterate_sinkpads (GST_AGGREGATOR (vagg), (GstAggregatorPadForeachFunc) clean_pad, NULL); } return ret; } /* Perform qos calculations before processing the next frame. Returns TRUE if * the frame should be processed, FALSE if the frame can be dropped entirely */ static gint64 gst_videoaggregator_do_qos (GstVideoAggregator * vagg, GstClockTime timestamp) { GstAggregator *agg = GST_AGGREGATOR (vagg); GstClockTime qostime, earliest_time; gdouble proportion; gint64 jitter; /* no timestamp, can't do QoS => process frame */ if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (timestamp))) { GST_LOG_OBJECT (vagg, "invalid timestamp, can't do QoS, process frame"); return -1; } /* get latest QoS observation values */ gst_videoaggregator_read_qos (vagg, &proportion, &earliest_time); /* skip qos if we have no observation (yet) => process frame */ if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (earliest_time))) { GST_LOG_OBJECT (vagg, "no observation yet, process frame"); return -1; } /* qos is done on running time */ qostime = gst_segment_to_running_time (&agg->segment, GST_FORMAT_TIME, timestamp); /* see how our next timestamp relates to the latest qos timestamp */ GST_LOG_OBJECT (vagg, "qostime %" GST_TIME_FORMAT ", earliest %" GST_TIME_FORMAT, GST_TIME_ARGS (qostime), GST_TIME_ARGS (earliest_time)); jitter = GST_CLOCK_DIFF (qostime, earliest_time); if (qostime != GST_CLOCK_TIME_NONE && jitter > 0) { GST_DEBUG_OBJECT (vagg, "we are late, drop frame"); return jitter; } GST_LOG_OBJECT (vagg, "process frame"); return jitter; } static GstFlowReturn gst_videoaggregator_aggregate (GstAggregator * agg) { GstFlowReturn ret; GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); GstClockTime output_start_time, output_end_time; GstBuffer *outbuf = NULL; gint res; gint64 jitter; GST_VIDEO_AGGREGATOR_LOCK (vagg); if (GST_VIDEO_INFO_FORMAT (&vagg->info) == GST_VIDEO_FORMAT_UNKNOWN || gst_pad_check_reconfigure (agg->srcpad)) { ret = gst_videoaggregator_update_converters (vagg); if (ret) ret = gst_videoaggregator_update_src_caps (vagg); if (!ret) { GST_VIDEO_AGGREGATOR_UNLOCK (vagg); return GST_FLOW_NOT_NEGOTIATED; } } if (agg->segment.position == -1) output_start_time = agg->segment.start; else output_start_time = agg->segment.position; output_end_time = vagg->priv->ts_offset + gst_util_uint64_scale_round (vagg->priv->nframes + 1, GST_SECOND * GST_VIDEO_INFO_FPS_D (&vagg->info), GST_VIDEO_INFO_FPS_N (&vagg->info)) + agg->segment.start; if (agg->segment.stop != -1) output_end_time = MIN (output_end_time, agg->segment.stop); if (output_end_time == output_start_time) { res = GST_FLOW_EOS; } else { res = gst_videoaggregator_fill_queues (vagg, output_start_time, output_end_time); } if (res == GST_FLOW_NEEDS_DATA) { GST_DEBUG_OBJECT (vagg, "Need more data for decisions"); ret = GST_FLOW_OK; goto done; } else if (res == GST_FLOW_EOS) { GST_VIDEO_AGGREGATOR_UNLOCK (vagg); GST_DEBUG_OBJECT (vagg, "All sinkpads are EOS -- forwarding"); ret = GST_FLOW_EOS; goto done_unlocked; } else if (res == GST_FLOW_ERROR) { GST_WARNING_OBJECT (vagg, "Error collecting buffers"); ret = GST_FLOW_ERROR; goto done; } jitter = gst_videoaggregator_do_qos (vagg, output_start_time); if (jitter <= 0) { ret = gst_videoaggregator_do_aggregate (vagg, output_start_time, output_end_time, &outbuf); vagg->priv->qos_processed++; } else { GstMessage *msg; vagg->priv->qos_dropped++; /* TODO: live */ msg = gst_message_new_qos (GST_OBJECT_CAST (vagg), FALSE, gst_segment_to_running_time (&agg->segment, GST_FORMAT_TIME, output_start_time), gst_segment_to_stream_time (&agg->segment, GST_FORMAT_TIME, output_start_time), output_start_time, output_end_time - output_start_time); gst_message_set_qos_values (msg, jitter, vagg->priv->proportion, 1000000); gst_message_set_qos_stats (msg, GST_FORMAT_BUFFERS, vagg->priv->qos_processed, vagg->priv->qos_dropped); gst_element_post_message (GST_ELEMENT_CAST (vagg), msg); ret = GST_FLOW_OK; } agg->segment.position = output_end_time; vagg->priv->nframes++; GST_VIDEO_AGGREGATOR_UNLOCK (vagg); if (outbuf) { GST_DEBUG_OBJECT (vagg, "Pushing buffer with ts %" GST_TIME_FORMAT " and duration %" GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)), GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf))); ret = gst_aggregator_finish_buffer (agg, outbuf); } goto done_unlocked; done: GST_VIDEO_AGGREGATOR_UNLOCK (vagg); done_unlocked: return ret; } /* FIXME, the duration query should reflect how long you will produce * data, that is the amount of stream time until you will emit EOS. * * For synchronized aggregating this is always the max of all the durations * of upstream since we emit EOS when all of them finished. * * We don't do synchronized aggregating so this really depends on where the * streams where punched in and what their relative offsets are against * each other which we can get from the first timestamps we see. * * When we add a new stream (or remove a stream) the duration might * also become invalid again and we need to post a new DURATION * message to notify this fact to the parent. * For now we take the max of all the upstream elements so the simple * cases work at least somewhat. */ static gboolean gst_videoaggregator_query_duration (GstVideoAggregator * vagg, GstQuery * query) { GValue item = { 0 }; gint64 max; gboolean res; GstFormat format; GstIterator *it; gboolean done; /* parse format */ gst_query_parse_duration (query, &format, NULL); max = -1; res = TRUE; done = FALSE; /* Take maximum of all durations */ it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (vagg)); while (!done) { switch (gst_iterator_next (it, &item)) { case GST_ITERATOR_DONE: done = TRUE; break; case GST_ITERATOR_OK: { GstPad *pad; gint64 duration; pad = g_value_get_object (&item); /* ask sink peer for duration */ res &= gst_pad_peer_query_duration (pad, format, &duration); /* take max from all valid return values */ if (res) { /* valid unknown length, stop searching */ if (duration == -1) { max = duration; done = TRUE; } /* else see if bigger than current max */ else if (duration > max) max = duration; } g_value_reset (&item); break; } case GST_ITERATOR_RESYNC: max = -1; res = TRUE; gst_iterator_resync (it); break; default: res = FALSE; done = TRUE; break; } } g_value_unset (&item); gst_iterator_free (it); if (res) { /* and store the max */ GST_DEBUG_OBJECT (vagg, "Total duration in format %s: %" GST_TIME_FORMAT, gst_format_get_name (format), GST_TIME_ARGS (max)); gst_query_set_duration (query, format, max); } return res; } static gboolean gst_videoaggregator_src_query (GstAggregator * agg, GstQuery * query) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); gboolean res = FALSE; switch (GST_QUERY_TYPE (query)) { case GST_QUERY_POSITION: { GstFormat format; gst_query_parse_position (query, &format, NULL); switch (format) { case GST_FORMAT_TIME: gst_query_set_position (query, format, gst_segment_to_stream_time (&agg->segment, GST_FORMAT_TIME, agg->segment.position)); res = TRUE; break; default: break; } break; } case GST_QUERY_DURATION: res = gst_videoaggregator_query_duration (vagg, query); break; case GST_QUERY_LATENCY: case GST_QUERY_CAPS: res = GST_AGGREGATOR_CLASS (gst_videoaggregator_parent_class)->src_query (agg, query); break; default: /* FIXME, needs a custom query handler because we have multiple * sinkpads */ res = FALSE; break; } return res; } static gboolean gst_videoaggregator_src_event (GstAggregator * agg, GstEvent * event) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_QOS: { GstQOSType type; GstClockTimeDiff diff; GstClockTime timestamp; gdouble proportion; gst_event_parse_qos (event, &type, &proportion, &diff, ×tamp); gst_videoaggregator_update_qos (vagg, proportion, diff, timestamp); break; } case GST_EVENT_SEEK: { GST_DEBUG_OBJECT (vagg, "Handling SEEK event"); } default: break; } return GST_AGGREGATOR_CLASS (gst_videoaggregator_parent_class)->src_event (agg, event); } static GstFlowReturn gst_videoaggregator_sink_clip (GstAggregator * agg, GstAggregatorPad * bpad, GstBuffer * buf, GstBuffer ** outbuf) { GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (bpad); GstClockTime start_time, end_time; start_time = GST_BUFFER_TIMESTAMP (buf); if (start_time == -1) { GST_DEBUG_OBJECT (pad, "Timestamped buffers required!"); gst_buffer_unref (buf); return GST_FLOW_ERROR; } end_time = GST_BUFFER_DURATION (buf); if (end_time == -1 && GST_VIDEO_INFO_FPS_N (&pad->info) != 0) end_time = gst_util_uint64_scale_int_round (GST_SECOND, GST_VIDEO_INFO_FPS_D (&pad->info), GST_VIDEO_INFO_FPS_N (&pad->info)); if (end_time == -1) { *outbuf = buf; return GST_FLOW_OK; } start_time = MAX (start_time, bpad->segment.start); start_time = gst_segment_to_running_time (&bpad->segment, GST_FORMAT_TIME, start_time); end_time += GST_BUFFER_TIMESTAMP (buf); if (bpad->segment.stop != -1) end_time = MIN (end_time, bpad->segment.stop); end_time = gst_segment_to_running_time (&bpad->segment, GST_FORMAT_TIME, end_time); /* Convert to the output segment rate */ if (ABS (agg->segment.rate) != 1.0) { end_time *= ABS (agg->segment.rate); } if (bpad->buffer != NULL && end_time < pad->end_time) { gst_buffer_unref (buf); *outbuf = NULL; return GST_FLOW_OK; } *outbuf = buf; return GST_FLOW_OK; } static GstFlowReturn gst_videoaggregator_flush (GstAggregator * agg) { GList *l; gdouble abs_rate; GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); GST_INFO_OBJECT (agg, "Flushing"); abs_rate = ABS (agg->segment.rate); GST_OBJECT_LOCK (vagg); for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) { GstVideoAggregatorPad *p = l->data; /* Convert to the output segment rate */ if (ABS (agg->segment.rate) != abs_rate) { if (ABS (agg->segment.rate) != 1.0 && p->buffer) { p->start_time /= ABS (agg->segment.rate); p->end_time /= ABS (agg->segment.rate); } if (abs_rate != 1.0 && p->buffer) { p->start_time *= abs_rate; p->end_time *= abs_rate; } } } GST_OBJECT_UNLOCK (vagg); agg->segment.position = -1; vagg->priv->ts_offset = 0; vagg->priv->nframes = 0; gst_videoaggregator_reset_qos (vagg); return GST_FLOW_OK; } static gboolean gst_videoaggregator_sink_event (GstAggregator * agg, GstAggregatorPad * bpad, GstEvent * event) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (bpad); gboolean ret = TRUE; GST_DEBUG_OBJECT (pad, "Got %s event on pad %s:%s", GST_EVENT_TYPE_NAME (event), GST_DEBUG_PAD_NAME (pad)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_CAPS: { GstCaps *caps; gst_event_parse_caps (event, &caps); ret = gst_videoaggregator_pad_sink_setcaps (GST_PAD (pad), GST_OBJECT (vagg), caps); gst_event_unref (event); event = NULL; break; } case GST_EVENT_SEGMENT:{ GstSegment seg; gst_event_copy_segment (event, &seg); g_assert (seg.format == GST_FORMAT_TIME); gst_videoaggregator_reset_qos (vagg); break; } default: break; } if (event != NULL) return GST_AGGREGATOR_CLASS (gst_videoaggregator_parent_class)->sink_event (agg, bpad, event); return ret; } static gboolean gst_videoaggregator_start (GstAggregator * agg) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); if (!GST_AGGREGATOR_CLASS (gst_videoaggregator_parent_class)->start (agg)) return FALSE; gst_caps_replace (&vagg->priv->current_caps, NULL); return TRUE; } static gboolean gst_videoaggregator_stop (GstAggregator * agg) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); if (!GST_AGGREGATOR_CLASS (gst_videoaggregator_parent_class)->stop (agg)) return FALSE; gst_videoaggregator_reset (vagg); return TRUE; } /* GstElement vmethods */ static GstPad * gst_videoaggregator_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps) { GstVideoAggregator *vagg; GstVideoAggregatorPad *vaggpad; vagg = GST_VIDEO_AGGREGATOR (element); vaggpad = (GstVideoAggregatorPad *) GST_ELEMENT_CLASS (gst_videoaggregator_parent_class)->request_new_pad (element, templ, req_name, caps); if (vaggpad == NULL) return NULL; GST_OBJECT_LOCK (vagg); vaggpad->zorder = GST_ELEMENT (vagg)->numsinkpads; vaggpad->start_time = -1; vaggpad->end_time = -1; element->sinkpads = g_list_sort (element->sinkpads, (GCompareFunc) pad_zorder_compare); GST_OBJECT_UNLOCK (vagg); gst_child_proxy_child_added (GST_CHILD_PROXY (vagg), G_OBJECT (vaggpad), GST_OBJECT_NAME (vaggpad)); return GST_PAD (vaggpad); } static void gst_videoaggregator_release_pad (GstElement * element, GstPad * pad) { GstVideoAggregator *vagg = NULL; GstVideoAggregatorPad *vaggpad; gboolean last_pad; vagg = GST_VIDEO_AGGREGATOR (element); vaggpad = GST_VIDEO_AGGREGATOR_PAD (pad); GST_VIDEO_AGGREGATOR_LOCK (vagg); GST_OBJECT_LOCK (vagg); last_pad = (GST_ELEMENT (vagg)->numsinkpads - 1 == 0); GST_OBJECT_UNLOCK (vagg); if (last_pad) gst_videoaggregator_reset (vagg); gst_buffer_replace (&vaggpad->buffer, NULL); gst_child_proxy_child_removed (GST_CHILD_PROXY (vagg), G_OBJECT (vaggpad), GST_OBJECT_NAME (vaggpad)); GST_ELEMENT_CLASS (gst_videoaggregator_parent_class)->release_pad (GST_ELEMENT (vagg), pad); gst_pad_mark_reconfigure (vagg->aggregator.srcpad); GST_VIDEO_AGGREGATOR_UNLOCK (vagg); return; } static GstFlowReturn gst_videoaggregator_get_output_buffer (GstVideoAggregator * videoaggregator, GstBuffer ** outbuf) { guint outsize; static GstAllocationParams params = { 0, 15, 0, 0, }; outsize = GST_VIDEO_INFO_SIZE (&videoaggregator->info); *outbuf = gst_buffer_new_allocate (NULL, outsize, ¶ms); if (*outbuf == NULL) { GST_ERROR_OBJECT (videoaggregator, "Could not instantiate buffer of size: %d", outsize); } return GST_FLOW_OK; } static gboolean gst_videoaggregator_pad_sink_acceptcaps (GstPad * pad, GstVideoAggregator * vagg, GstCaps * caps) { gboolean ret; GstCaps *modified_caps; GstCaps *accepted_caps; GstCaps *template_caps; gboolean had_current_caps = TRUE; gint i, n; GstStructure *s; GstAggregator *agg = GST_AGGREGATOR (vagg); GST_DEBUG_OBJECT (pad, "%" GST_PTR_FORMAT, caps); accepted_caps = gst_pad_get_current_caps (GST_PAD (agg->srcpad)); template_caps = gst_pad_get_pad_template_caps (GST_PAD (agg->srcpad)); if (accepted_caps == NULL) { accepted_caps = template_caps; had_current_caps = FALSE; } accepted_caps = gst_caps_make_writable (accepted_caps); GST_LOG_OBJECT (pad, "src caps %" GST_PTR_FORMAT, accepted_caps); n = gst_caps_get_size (accepted_caps); for (i = 0; i < n; i++) { s = gst_caps_get_structure (accepted_caps, i); gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT, "height", GST_TYPE_INT_RANGE, 1, G_MAXINT, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL); if (!gst_structure_has_field (s, "pixel-aspect-ratio")) gst_structure_set (s, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1, NULL); gst_structure_remove_fields (s, "colorimetry", "chroma-site", "format", NULL); } modified_caps = gst_caps_intersect (accepted_caps, template_caps); ret = gst_caps_can_intersect (caps, accepted_caps); GST_DEBUG_OBJECT (pad, "%saccepted caps %" GST_PTR_FORMAT, (ret ? "" : "not "), caps); gst_caps_unref (accepted_caps); gst_caps_unref (modified_caps); if (had_current_caps) gst_caps_unref (template_caps); return ret; } static gboolean gst_videoaggregator_sink_query (GstAggregator * agg, GstAggregatorPad * bpad, GstQuery * query) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (bpad); gboolean ret = FALSE; switch (GST_QUERY_TYPE (query)) { case GST_QUERY_CAPS: { GstCaps *filter, *caps; gst_query_parse_caps (query, &filter); caps = gst_videoaggregator_pad_sink_getcaps (GST_PAD (pad), vagg, filter); gst_query_set_caps_result (query, caps); gst_caps_unref (caps); ret = TRUE; break; } case GST_QUERY_ACCEPT_CAPS: { GstCaps *caps; gst_query_parse_accept_caps (query, &caps); ret = gst_videoaggregator_pad_sink_acceptcaps (GST_PAD (pad), vagg, caps); gst_query_set_accept_caps_result (query, ret); ret = TRUE; break; } default: ret = GST_AGGREGATOR_CLASS (gst_videoaggregator_parent_class)->sink_query (agg, bpad, query); break; } return ret; } /* GObject vmethods */ static void gst_videoaggregator_finalize (GObject * o) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (o); g_mutex_clear (&vagg->priv->lock); G_OBJECT_CLASS (gst_videoaggregator_parent_class)->finalize (o); } static void gst_videoaggregator_dispose (GObject * o) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (o); gst_caps_replace (&vagg->priv->current_caps, NULL); G_OBJECT_CLASS (gst_videoaggregator_parent_class)->dispose (o); } static void gst_videoaggregator_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { switch (prop_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_videoaggregator_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { switch (prop_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /* GObject boilerplate */ static void gst_videoaggregator_class_init (GstVideoAggregatorClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GstElementClass *gstelement_class = (GstElementClass *) klass; GstAggregatorClass *agg_class = (GstAggregatorClass *) klass; GST_DEBUG_CATEGORY_INIT (gst_videoaggregator_debug, "videoaggregator", 0, "base video aggregator"); g_type_class_add_private (klass, sizeof (GstVideoAggregatorPrivate)); gobject_class->finalize = gst_videoaggregator_finalize; gobject_class->dispose = gst_videoaggregator_dispose; gobject_class->get_property = gst_videoaggregator_get_property; gobject_class->set_property = gst_videoaggregator_set_property; gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR (gst_videoaggregator_request_new_pad); gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_videoaggregator_release_pad); gst_element_class_set_static_metadata (gstelement_class, "Video aggregator base class", "Filter/Editor/Video", "Aggregate multiple video streams", "Wim Taymans , " "Sebastian Dröge , " "Mathieu Duponchelle , " "Thibault Saunier "); agg_class->sinkpads_type = GST_TYPE_VIDEO_AGGREGATOR_PAD; agg_class->start = gst_videoaggregator_start; agg_class->stop = gst_videoaggregator_stop; agg_class->sink_query = gst_videoaggregator_sink_query; agg_class->sink_event = gst_videoaggregator_sink_event; agg_class->flush = gst_videoaggregator_flush; agg_class->clip = gst_videoaggregator_sink_clip; agg_class->aggregate = gst_videoaggregator_aggregate; agg_class->src_event = gst_videoaggregator_src_event; agg_class->src_query = gst_videoaggregator_src_query; klass->find_best_format = gst_videoaggreagator_find_best_format; klass->get_output_buffer = gst_videoaggregator_get_output_buffer; /* Register the pad class */ g_type_class_ref (GST_TYPE_VIDEO_AGGREGATOR_PAD); } static void gst_videoaggregator_init (GstVideoAggregator * vagg) { vagg->priv = G_TYPE_INSTANCE_GET_PRIVATE (vagg, GST_TYPE_VIDEO_AGGREGATOR, GstVideoAggregatorPrivate); vagg->priv->current_caps = NULL; g_mutex_init (&vagg->priv->lock); /* initialize variables */ gst_videoaggregator_reset (vagg); }