/* 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 * @title: 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" GST_DEBUG_CATEGORY_STATIC (gst_video_aggregator_debug); #define GST_CAT_DEFAULT gst_video_aggregator_debug /* Needed prototypes */ static void gst_video_aggregator_reset_qos (GstVideoAggregator * vagg); /**************************************** * GstVideoAggregatorPad implementation * ****************************************/ #define DEFAULT_PAD_ZORDER 0 #define DEFAULT_PAD_REPEAT_AFTER_EOS FALSE #define DEFAULT_PAD_MAX_LAST_BUFFER_REPEAT GST_CLOCK_TIME_NONE enum { PROP_PAD_0, PROP_PAD_ZORDER, PROP_PAD_REPEAT_AFTER_EOS, PROP_PAD_MAX_LAST_BUFFER_REPEAT, }; struct _GstVideoAggregatorPadPrivate { GstBuffer *buffer; GstVideoFrame prepared_frame; /* properties */ guint zorder; gboolean repeat_after_eos; GstClockTime max_last_buffer_repeat; /* Subclasses can force an alpha channel in the (input thus output) * colorspace format */ gboolean needs_alpha; GstClockTime start_time; GstClockTime end_time; GstVideoInfo pending_vinfo; }; G_DEFINE_TYPE_WITH_PRIVATE (GstVideoAggregatorPad, gst_video_aggregator_pad, GST_TYPE_AGGREGATOR_PAD); static void gst_video_aggregator_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->priv->zorder); break; case PROP_PAD_REPEAT_AFTER_EOS: g_value_set_boolean (value, pad->priv->repeat_after_eos); break; case PROP_PAD_MAX_LAST_BUFFER_REPEAT: g_value_set_uint64 (value, pad->priv->max_last_buffer_repeat); 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->priv->zorder - pad2->priv->zorder; } static void gst_video_aggregator_pad_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (object); switch (prop_id) { case PROP_PAD_ZORDER:{ GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (gst_pad_get_parent (GST_PAD (pad))); if (vagg) { GST_OBJECT_LOCK (vagg); pad->priv->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); gst_object_unref (vagg); } else { pad->priv->zorder = g_value_get_uint (value); } break; } case PROP_PAD_REPEAT_AFTER_EOS: pad->priv->repeat_after_eos = g_value_get_boolean (value); break; case PROP_PAD_MAX_LAST_BUFFER_REPEAT: pad->priv->max_last_buffer_repeat = g_value_get_uint64 (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GstFlowReturn _flush_pad (GstAggregatorPad * aggpad, GstAggregator * aggregator) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (aggregator); GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (aggpad); gst_video_aggregator_reset_qos (vagg); gst_buffer_replace (&pad->priv->buffer, NULL); pad->priv->start_time = -1; pad->priv->end_time = -1; return GST_FLOW_OK; } static gboolean gst_video_aggregator_pad_skip_buffer (GstAggregatorPad * aggpad, GstAggregator * agg, GstBuffer * buffer) { gboolean ret = FALSE; GstSegment *agg_segment = &GST_AGGREGATOR_PAD (agg->srcpad)->segment; if (agg_segment->position != GST_CLOCK_TIME_NONE && GST_BUFFER_DURATION (buffer) != GST_CLOCK_TIME_NONE) { GstClockTime start_time = gst_segment_to_running_time (&aggpad->segment, GST_FORMAT_TIME, GST_BUFFER_PTS (buffer)); GstClockTime end_time = start_time + GST_BUFFER_DURATION (buffer); GstClockTime output_start_running_time = gst_segment_to_running_time (agg_segment, GST_FORMAT_TIME, agg_segment->position); ret = end_time < output_start_running_time; } return ret; } static gboolean gst_video_aggregator_pad_prepare_frame (GstVideoAggregatorPad * pad, GstVideoAggregator * vagg, GstBuffer * buffer, GstVideoFrame * prepared_frame) { if (!gst_video_frame_map (prepared_frame, &pad->info, buffer, GST_MAP_READ)) { GST_WARNING_OBJECT (vagg, "Could not map input buffer"); return FALSE; } return TRUE; } static void gst_video_aggregator_pad_clean_frame (GstVideoAggregatorPad * pad, GstVideoAggregator * vagg, GstVideoFrame * prepared_frame) { if (prepared_frame->buffer) { gst_video_frame_unmap (prepared_frame); memset (prepared_frame, 0, sizeof (GstVideoFrame)); } } static void gst_video_aggregator_pad_class_init (GstVideoAggregatorPadClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GstAggregatorPadClass *aggpadclass = (GstAggregatorPadClass *) klass; gobject_class->set_property = gst_video_aggregator_pad_set_property; gobject_class->get_property = gst_video_aggregator_pad_get_property; g_object_class_install_property (gobject_class, PROP_PAD_ZORDER, g_param_spec_uint ("zorder", "Z-Order", "Z Order of the picture", 0, G_MAXUINT, DEFAULT_PAD_ZORDER, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PAD_REPEAT_AFTER_EOS, g_param_spec_boolean ("repeat-after-eos", "Repeat After EOS", "Repeat the " "last frame after EOS until all pads are EOS", DEFAULT_PAD_REPEAT_AFTER_EOS, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); /** * GstVideoAggregatorPad::max-last-buffer-repeat: * * Repeat last buffer for time (in ns, -1 = until EOS). * The default behaviour is for the last buffer received on a pad to be * aggregated until a new buffer is received. * * Setting this property causes the last buffer to be discarded once the * running time of the output buffer is `max-last-buffer-repeat` nanoseconds * past its end running time. When the buffer didn't have a duration, the * comparison is made against its running start time. * * This is useful in live scenarios: when a stream encounters a temporary * networking problem, a #GstVideoAggregator subclass can then fall back to * displaying a lower z-order stream, or the background. * * Setting this property doesn't affect the behaviour on EOS. * * Since: 1.18 */ g_object_class_install_property (gobject_class, PROP_PAD_MAX_LAST_BUFFER_REPEAT, g_param_spec_uint64 ("max-last-buffer-repeat", "Max Last Buffer Repeat", "Repeat last buffer for time (in ns, -1=until EOS), " "behaviour on EOS is not affected", 0, G_MAXUINT64, DEFAULT_PAD_MAX_LAST_BUFFER_REPEAT, G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING | G_PARAM_STATIC_STRINGS)); aggpadclass->flush = GST_DEBUG_FUNCPTR (_flush_pad); aggpadclass->skip_buffer = GST_DEBUG_FUNCPTR (gst_video_aggregator_pad_skip_buffer); 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_video_aggregator_pad_init (GstVideoAggregatorPad * vaggpad) { vaggpad->priv = gst_video_aggregator_pad_get_instance_private (vaggpad); vaggpad->priv->zorder = DEFAULT_PAD_ZORDER; vaggpad->priv->repeat_after_eos = DEFAULT_PAD_REPEAT_AFTER_EOS; vaggpad->priv->max_last_buffer_repeat = DEFAULT_PAD_MAX_LAST_BUFFER_REPEAT; memset (&vaggpad->priv->prepared_frame, 0, sizeof (GstVideoFrame)); } /** * gst_video_aggregator_pad_has_current_buffer: * @pad: a #GstVideoAggregatorPad * * Checks if the pad currently has a buffer queued that is going to be used * for the current output frame. * * This must only be called from the #GstVideoAggregatorClass::aggregate_frames virtual method, * or from the #GstVideoAggregatorPadClass::prepare_frame virtual method of the aggregator pads. * * Returns: %TRUE if the pad has currently a buffer queued */ gboolean gst_video_aggregator_pad_has_current_buffer (GstVideoAggregatorPad * pad) { g_return_val_if_fail (GST_IS_VIDEO_AGGREGATOR_PAD (pad), FALSE); return pad->priv->buffer != NULL; } /** * gst_video_aggregator_pad_get_current_buffer: * @pad: a #GstVideoAggregatorPad * * Returns the currently queued buffer that is going to be used * for the current output frame. * * This must only be called from the #GstVideoAggregatorClass::aggregate_frames virtual method, * or from the #GstVideoAggregatorPadClass::prepare_frame virtual method of the aggregator pads. * * The return value is only valid until #GstVideoAggregatorClass::aggregate_frames or #GstVideoAggregatorPadClass::prepare_frame * returns. * * Returns: (transfer none): The currently queued buffer */ GstBuffer * gst_video_aggregator_pad_get_current_buffer (GstVideoAggregatorPad * pad) { g_return_val_if_fail (GST_IS_VIDEO_AGGREGATOR_PAD (pad), NULL); return pad->priv->buffer; } /** * gst_video_aggregator_pad_get_prepared_frame: * @pad: a #GstVideoAggregatorPad * * Returns the currently prepared video frame that has to be aggregated into * the current output frame. * * This must only be called from the #GstVideoAggregatorClass::aggregate_frames virtual method, * or from the #GstVideoAggregatorPadClass::prepare_frame virtual method of the aggregator pads. * * The return value is only valid until #GstVideoAggregatorClass::aggregate_frames or #GstVideoAggregatorPadClass::prepare_frame * returns. * * Returns: (transfer none): The currently prepared video frame */ GstVideoFrame * gst_video_aggregator_pad_get_prepared_frame (GstVideoAggregatorPad * pad) { g_return_val_if_fail (GST_IS_VIDEO_AGGREGATOR_PAD (pad), NULL); return pad->priv->prepared_frame.buffer ? &pad->priv->prepared_frame : NULL; } /** * gst_video_aggregator_pad_set_needs_alpha: * @pad: a #GstVideoAggregatorPad * @needs_alpha: %TRUE if this pad requires alpha output * * Allows selecting that this pad requires an output format with alpha * */ void gst_video_aggregator_pad_set_needs_alpha (GstVideoAggregatorPad * pad, gboolean needs_alpha) { g_return_if_fail (GST_IS_VIDEO_AGGREGATOR_PAD (pad)); if (needs_alpha != pad->priv->needs_alpha) { GstAggregator *agg = GST_AGGREGATOR (gst_object_get_parent (GST_OBJECT (pad))); pad->priv->needs_alpha = needs_alpha; if (agg) { gst_pad_mark_reconfigure (GST_AGGREGATOR_SRC_PAD (agg)); gst_object_unref (agg); } } } /**************************************** * GstVideoAggregatorConvertPad implementation * ****************************************/ enum { PROP_CONVERT_PAD_0, PROP_CONVERT_PAD_CONVERTER_CONFIG, }; struct _GstVideoAggregatorConvertPadPrivate { /* Converter, if NULL no conversion is done */ GstVideoConverter *convert; /* caps used for conversion if needed */ GstVideoInfo conversion_info; GstBuffer *converted_buffer; GstStructure *converter_config; gboolean converter_config_changed; }; G_DEFINE_TYPE_WITH_PRIVATE (GstVideoAggregatorConvertPad, gst_video_aggregator_convert_pad, GST_TYPE_VIDEO_AGGREGATOR_PAD); static void gst_video_aggregator_convert_pad_finalize (GObject * o) { GstVideoAggregatorConvertPad *vaggpad = GST_VIDEO_AGGREGATOR_CONVERT_PAD (o); if (vaggpad->priv->convert) gst_video_converter_free (vaggpad->priv->convert); vaggpad->priv->convert = NULL; if (vaggpad->priv->converter_config) gst_structure_free (vaggpad->priv->converter_config); vaggpad->priv->converter_config = NULL; G_OBJECT_CLASS (gst_video_aggregator_pad_parent_class)->finalize (o); } static void gst_video_aggregator_convert_pad_update_conversion_info_internal (GstVideoAggregatorPad * vpad) { GstVideoAggregatorConvertPad *pad = GST_VIDEO_AGGREGATOR_CONVERT_PAD (vpad); pad->priv->converter_config_changed = TRUE; } static gboolean gst_video_aggregator_convert_pad_prepare_frame (GstVideoAggregatorPad * vpad, GstVideoAggregator * vagg, GstBuffer * buffer, GstVideoFrame * prepared_frame) { GstVideoAggregatorConvertPad *pad = GST_VIDEO_AGGREGATOR_CONVERT_PAD (vpad); GstVideoFrame frame; /* Update/create converter as needed */ if (pad->priv->converter_config_changed) { GstVideoAggregatorConvertPadClass *klass = GST_VIDEO_AGGREGATOR_CONVERT_PAD_GET_CLASS (pad); GstVideoInfo conversion_info; gst_video_info_init (&conversion_info); klass->create_conversion_info (pad, vagg, &conversion_info); if (conversion_info.finfo == NULL) return FALSE; pad->priv->converter_config_changed = FALSE; pad->priv->conversion_info = conversion_info; if (pad->priv->convert) gst_video_converter_free (pad->priv->convert); pad->priv->convert = NULL; if (!gst_video_info_is_equal (&vpad->info, &pad->priv->conversion_info)) { pad->priv->convert = gst_video_converter_new (&vpad->info, &pad->priv->conversion_info, pad->priv->converter_config ? gst_structure_copy (pad-> priv->converter_config) : NULL); if (!pad->priv->convert) { GST_WARNING_OBJECT (pad, "No path found for conversion"); return FALSE; } GST_DEBUG_OBJECT (pad, "This pad will be converted from %d to %d", GST_VIDEO_INFO_FORMAT (&vpad->info), GST_VIDEO_INFO_FORMAT (&pad->priv->conversion_info)); } else { GST_DEBUG_OBJECT (pad, "This pad will not need conversion"); } } if (!gst_video_frame_map (&frame, &vpad->info, buffer, GST_MAP_READ)) { GST_WARNING_OBJECT (vagg, "Could not map input buffer"); return FALSE; } if (pad->priv->convert) { GstVideoFrame converted_frame; GstBuffer *converted_buf = NULL; static GstAllocationParams params = { 0, 15, 0, 0, }; gint converted_size; guint outsize; /* 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"); gst_video_frame_unmap (&frame); return FALSE; } gst_video_converter_frame (pad->priv->convert, &frame, &converted_frame); pad->priv->converted_buffer = converted_buf; gst_video_frame_unmap (&frame); *prepared_frame = converted_frame; } else { *prepared_frame = frame; } return TRUE; } static void gst_video_aggregator_convert_pad_clean_frame (GstVideoAggregatorPad * vpad, GstVideoAggregator * vagg, GstVideoFrame * prepared_frame) { GstVideoAggregatorConvertPad *pad = GST_VIDEO_AGGREGATOR_CONVERT_PAD (vpad); if (prepared_frame->buffer) { gst_video_frame_unmap (prepared_frame); memset (prepared_frame, 0, sizeof (GstVideoFrame)); } if (pad->priv->converted_buffer) { gst_buffer_unref (pad->priv->converted_buffer); pad->priv->converted_buffer = NULL; } } static void gst_video_aggregator_convert_pad_create_conversion_info (GstVideoAggregatorConvertPad * pad, GstVideoAggregator * agg, GstVideoInfo * convert_info) { GstVideoAggregatorPad *vpad = GST_VIDEO_AGGREGATOR_PAD (pad); gchar *colorimetry, *best_colorimetry; const gchar *chroma, *best_chroma; g_return_if_fail (GST_IS_VIDEO_AGGREGATOR_CONVERT_PAD (pad)); g_return_if_fail (convert_info != NULL); if (!vpad->info.finfo || GST_VIDEO_INFO_FORMAT (&vpad->info) == GST_VIDEO_FORMAT_UNKNOWN) { return; } if (!agg->info.finfo || GST_VIDEO_INFO_FORMAT (&agg->info) == GST_VIDEO_FORMAT_UNKNOWN) { return; } colorimetry = gst_video_colorimetry_to_string (&vpad->info.colorimetry); chroma = gst_video_chroma_to_string (vpad->info.chroma_site); best_colorimetry = gst_video_colorimetry_to_string (&agg->info.colorimetry); best_chroma = gst_video_chroma_to_string (agg->info.chroma_site); if (GST_VIDEO_INFO_FORMAT (&agg->info) != GST_VIDEO_INFO_FORMAT (&vpad->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 (&agg->info), vpad->info.width, vpad->info.height); tmp_info.chroma_site = agg->info.chroma_site; tmp_info.colorimetry = agg->info.colorimetry; tmp_info.par_n = vpad->info.par_n; tmp_info.par_d = vpad->info.par_d; tmp_info.fps_n = vpad->info.fps_n; tmp_info.fps_d = vpad->info.fps_d; tmp_info.flags = vpad->info.flags; tmp_info.interlace_mode = vpad->info.interlace_mode; *convert_info = tmp_info; } else { *convert_info = vpad->info; } g_free (colorimetry); g_free (best_colorimetry); } static void gst_video_aggregator_convert_pad_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstVideoAggregatorConvertPad *pad = GST_VIDEO_AGGREGATOR_CONVERT_PAD (object); switch (prop_id) { case PROP_CONVERT_PAD_CONVERTER_CONFIG: GST_OBJECT_LOCK (pad); if (pad->priv->converter_config) g_value_set_boxed (value, pad->priv->converter_config); GST_OBJECT_UNLOCK (pad); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_video_aggregator_convert_pad_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstVideoAggregatorConvertPad *pad = GST_VIDEO_AGGREGATOR_CONVERT_PAD (object); switch (prop_id) { case PROP_CONVERT_PAD_CONVERTER_CONFIG: GST_OBJECT_LOCK (pad); if (pad->priv->converter_config) gst_structure_free (pad->priv->converter_config); pad->priv->converter_config = g_value_dup_boxed (value); pad->priv->converter_config_changed = TRUE; GST_OBJECT_UNLOCK (pad); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_video_aggregator_convert_pad_class_init (GstVideoAggregatorConvertPadClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GstVideoAggregatorPadClass *vaggpadclass = (GstVideoAggregatorPadClass *) klass; gobject_class->finalize = gst_video_aggregator_convert_pad_finalize; gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_video_aggregator_convert_pad_get_property); gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_video_aggregator_convert_pad_set_property); g_object_class_install_property (gobject_class, PROP_CONVERT_PAD_CONVERTER_CONFIG, g_param_spec_boxed ("converter-config", "Converter configuration", "A GstStructure describing the configuration that should be used " "when scaling and converting this pad's video frames", GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); vaggpadclass->update_conversion_info = GST_DEBUG_FUNCPTR (gst_video_aggregator_convert_pad_update_conversion_info_internal); vaggpadclass->prepare_frame = GST_DEBUG_FUNCPTR (gst_video_aggregator_convert_pad_prepare_frame); vaggpadclass->clean_frame = GST_DEBUG_FUNCPTR (gst_video_aggregator_convert_pad_clean_frame); klass->create_conversion_info = gst_video_aggregator_convert_pad_create_conversion_info; } static void gst_video_aggregator_convert_pad_init (GstVideoAggregatorConvertPad * vaggpad) { vaggpad->priv = gst_video_aggregator_convert_pad_get_instance_private (vaggpad); vaggpad->priv->converted_buffer = NULL; vaggpad->priv->convert = NULL; vaggpad->priv->converter_config = NULL; vaggpad->priv->converter_config_changed = FALSE; } /** * gst_video_aggregator_convert_pad_update_conversion_info: * @pad: a #GstVideoAggregatorPad * * Requests the pad to check and update the converter before the next usage to * update for any changes that have happened. * */ void gst_video_aggregator_convert_pad_update_conversion_info (GstVideoAggregatorConvertPad * pad) { g_return_if_fail (GST_IS_VIDEO_AGGREGATOR_CONVERT_PAD (pad)); pad->priv->converter_config_changed = TRUE; } /************************************** * 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; gboolean live; }; /* Can't use the G_DEFINE_TYPE macros because we need the * videoaggregator class in the _init to be able to set * the sink pad non-alpha caps. Using the G_DEFINE_TYPE there * seems to be no way of getting the real class being initialized */ static void gst_video_aggregator_init (GstVideoAggregator * self, GstVideoAggregatorClass * klass); static void gst_video_aggregator_class_init (GstVideoAggregatorClass * klass); static gpointer gst_video_aggregator_parent_class = NULL; static gint video_aggregator_private_offset = 0; GType gst_video_aggregator_get_type (void) { static volatile gsize g_define_type_id_volatile = 0; if (g_once_init_enter (&g_define_type_id_volatile)) { GType g_define_type_id = g_type_register_static_simple (GST_TYPE_AGGREGATOR, g_intern_static_string ("GstVideoAggregator"), sizeof (GstVideoAggregatorClass), (GClassInitFunc) gst_video_aggregator_class_init, sizeof (GstVideoAggregator), (GInstanceInitFunc) gst_video_aggregator_init, (GTypeFlags) G_TYPE_FLAG_ABSTRACT); video_aggregator_private_offset = g_type_add_instance_private (g_define_type_id, sizeof (GstVideoAggregatorPrivate)); g_once_init_leave (&g_define_type_id_volatile, g_define_type_id); } return g_define_type_id_volatile; } static inline GstVideoAggregatorPrivate * gst_video_aggregator_get_instance_private (GstVideoAggregator * self) { return (G_STRUCT_MEMBER_P (self, video_aggregator_private_offset)); } static void gst_video_aggregator_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 += pad->info.width * pad->info.height; 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->priv->needs_alpha && (!GST_VIDEO_FORMAT_INFO_HAS_ALPHA (pad->info.finfo)))) { need_alpha = TRUE; /* Just fallback to ARGB in case we require alpha but the input pad * does not have alpha. * Do not increment best_format_number in that case. */ gst_video_info_set_format (best_info, GST_VIDEO_FORMAT_ARGB, GST_VIDEO_INFO_WIDTH (&pad->info), GST_VIDEO_INFO_HEIGHT (&pad->info)); } else 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); } static GstCaps * gst_video_aggregator_default_fixate_src_caps (GstAggregator * agg, GstCaps * caps) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); gint best_width = -1, best_height = -1; gint best_fps_n = -1, best_fps_d = -1; gdouble best_fps = -1.; GstStructure *s; GList *l; GST_OBJECT_LOCK (vagg); for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) { GstVideoAggregatorPad *mpad = l->data; gint fps_n, fps_d; gint width, height; gdouble cur_fps; 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; if (best_width < width) best_width = width; if (best_height < height) best_height = 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; } caps = gst_caps_make_writable (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); if (gst_structure_has_field (s, "pixel-aspect-ratio")) gst_structure_fixate_field_nearest_fraction (s, "pixel-aspect-ratio", 1, 1); caps = gst_caps_fixate (caps); return caps; } static GstCaps * gst_video_aggregator_default_update_caps (GstVideoAggregator * vagg, GstCaps * caps) { GstVideoAggregatorClass *vagg_klass = GST_VIDEO_AGGREGATOR_GET_CLASS (vagg); GstCaps *ret, *best_format_caps; gboolean at_least_one_alpha = FALSE; GstVideoFormat best_format; GstVideoInfo best_info; gchar *color_name; best_format = GST_VIDEO_FORMAT_UNKNOWN; gst_video_info_init (&best_info); if (vagg_klass->find_best_format) { vagg_klass->find_best_format (vagg, caps, &best_info, &at_least_one_alpha); best_format = GST_VIDEO_INFO_FORMAT (&best_info); } if (best_format == GST_VIDEO_FORMAT_UNKNOWN) { GstCaps *tmp = gst_caps_fixate (gst_caps_ref (caps)); gst_video_info_from_caps (&best_info, tmp); best_format = GST_VIDEO_INFO_FORMAT (&best_info); gst_caps_unref (tmp); } color_name = gst_video_colorimetry_to_string (&best_info.colorimetry); GST_DEBUG_OBJECT (vagg, "The output format will now be : %d with chroma : %s and colorimetry %s", best_format, GST_STR_NULL (gst_video_chroma_to_string (best_info.chroma_site)), GST_STR_NULL (color_name)); best_format_caps = gst_caps_copy (caps); gst_caps_set_simple (best_format_caps, "format", G_TYPE_STRING, gst_video_format_to_string (best_format), NULL); if (best_info.chroma_site != GST_VIDEO_CHROMA_SITE_UNKNOWN) gst_caps_set_simple (best_format_caps, "chroma-site", G_TYPE_STRING, gst_video_chroma_to_string (best_info.chroma_site), NULL); if (color_name != NULL) gst_caps_set_simple (best_format_caps, "colorimetry", G_TYPE_STRING, color_name, NULL); g_free (color_name); ret = gst_caps_merge (best_format_caps, gst_caps_ref (caps)); return ret; } static GstFlowReturn gst_video_aggregator_default_update_src_caps (GstAggregator * agg, GstCaps * caps, GstCaps ** ret) { GstVideoAggregatorClass *vagg_klass = GST_VIDEO_AGGREGATOR_GET_CLASS (agg); GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); gboolean at_least_one_pad_configured = FALSE; GList *l; GST_OBJECT_LOCK (vagg); for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) { GstVideoAggregatorPad *mpad = l->data; if (GST_VIDEO_INFO_WIDTH (&mpad->info) == 0 || GST_VIDEO_INFO_HEIGHT (&mpad->info) == 0) continue; at_least_one_pad_configured = TRUE; } GST_OBJECT_UNLOCK (vagg); if (!at_least_one_pad_configured) { /* We couldn't decide the output video info because the sinkpads don't have * all the caps yet, so we mark the pad as needing a reconfigure. This * allows aggregate() to skip ahead a bit and try again later. */ GST_DEBUG_OBJECT (vagg, "Couldn't decide output video info"); gst_pad_mark_reconfigure (agg->srcpad); return GST_AGGREGATOR_FLOW_NEED_DATA; } g_assert (vagg_klass->update_caps); *ret = vagg_klass->update_caps (vagg, caps); return GST_FLOW_OK; } static gboolean _update_conversion_info (GstElement * element, GstPad * pad, gpointer user_data) { GstVideoAggregatorPad *vaggpad = GST_VIDEO_AGGREGATOR_PAD (pad); GstVideoAggregatorPadClass *vaggpad_klass = GST_VIDEO_AGGREGATOR_PAD_GET_CLASS (vaggpad); if (vaggpad_klass->update_conversion_info) { vaggpad_klass->update_conversion_info (vaggpad); } return TRUE; } static gboolean gst_video_aggregator_default_negotiated_src_caps (GstAggregator * agg, GstCaps * caps) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); gboolean at_least_one_alpha = FALSE; const GstVideoFormatInfo *finfo; GstVideoInfo info; GList *l; GST_INFO_OBJECT (agg->srcpad, "set src caps: %" GST_PTR_FORMAT, caps); GST_OBJECT_LOCK (vagg); for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) { GstVideoAggregatorPad *mpad = l->data; if (GST_VIDEO_INFO_WIDTH (&mpad->info) == 0 || GST_VIDEO_INFO_HEIGHT (&mpad->info) == 0) continue; if (mpad->info.finfo->flags & GST_VIDEO_FORMAT_FLAG_ALPHA) at_least_one_alpha = TRUE; } GST_OBJECT_UNLOCK (vagg); if (!gst_video_info_from_caps (&info, caps)) return FALSE; 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 (GST_AGGREGATOR_PAD (agg->srcpad)->segment.position != -1) { vagg->priv->nframes = 0; /* The timestamp offset will be updated based on the * segment position the next time we aggregate */ GST_DEBUG_OBJECT (vagg, "Resetting frame counter because of framerate change"); } gst_video_aggregator_reset_qos (vagg); } vagg->info = info; finfo = vagg->info.finfo; if (at_least_one_alpha && !(finfo->flags & GST_VIDEO_FORMAT_FLAG_ALPHA)) { GST_ELEMENT_ERROR (vagg, CORE, NEGOTIATION, ("At least one of the input pads contains alpha, but configured caps don't support alpha."), ("Either convert your inputs to not contain alpha or add a videoconvert after the aggregator")); return FALSE; } /* Then browse the sinks once more, setting or unsetting conversion if needed */ gst_element_foreach_sink_pad (GST_ELEMENT_CAST (vagg), _update_conversion_info, NULL); if (vagg->priv->current_caps == NULL || gst_caps_is_equal (caps, vagg->priv->current_caps) == FALSE) { GstClockTime latency; gst_caps_replace (&vagg->priv->current_caps, caps); gst_aggregator_set_src_caps (agg, caps); latency = gst_util_uint64_scale (GST_SECOND, GST_VIDEO_INFO_FPS_D (&vagg->info), GST_VIDEO_INFO_FPS_N (&vagg->info)); gst_aggregator_set_latency (agg, latency, latency); } return TRUE; } static gboolean gst_video_aggregator_get_sinkpads_interlace_mode (GstVideoAggregator * vagg, GstVideoAggregatorPad * skip_pad, GstVideoInterlaceMode * mode) { GList *walk; GST_OBJECT_LOCK (vagg); for (walk = GST_ELEMENT (vagg)->sinkpads; walk; walk = g_list_next (walk)) { GstVideoAggregatorPad *vaggpad = walk->data; if (skip_pad && vaggpad == skip_pad) continue; if (vaggpad->info.finfo && GST_VIDEO_INFO_FORMAT (&vaggpad->info) != GST_VIDEO_FORMAT_UNKNOWN) { *mode = GST_VIDEO_INFO_INTERLACE_MODE (&vaggpad->info); GST_OBJECT_UNLOCK (vagg); return TRUE; } } GST_OBJECT_UNLOCK (vagg); return FALSE; } static gboolean gst_video_aggregator_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); { GstVideoInterlaceMode pads_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE; gboolean has_mode = FALSE; /* get the current output setting or fallback to other pads settings */ if (GST_VIDEO_INFO_FORMAT (&vagg->info) != GST_VIDEO_FORMAT_UNKNOWN) { pads_mode = GST_VIDEO_INFO_INTERLACE_MODE (&vagg->info); has_mode = TRUE; } else { has_mode = gst_video_aggregator_get_sinkpads_interlace_mode (vagg, vaggpad, &pads_mode); } if (has_mode) { if (pads_mode != 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; } } } if (!vaggpad->info.finfo || GST_VIDEO_INFO_FORMAT (&vaggpad->info) == GST_VIDEO_FORMAT_UNKNOWN) { /* no video info was already set, so this is the first time * that this pad is getting configured; configure immediately to avoid * problems with the initial negotiation */ vaggpad->info = info; gst_pad_mark_reconfigure (GST_AGGREGATOR_SRC_PAD (vagg)); } else { /* this pad already had caps but received new ones; keep the new caps * pending until we pick the next buffer from the queue, otherwise we * might use an old buffer with the new caps and crash */ vaggpad->priv->pending_vinfo = info; GST_DEBUG_OBJECT (pad, "delaying caps change"); } ret = TRUE; GST_VIDEO_AGGREGATOR_UNLOCK (vagg); beach: return ret; } static gboolean gst_video_aggregator_caps_has_alpha (GstCaps * caps) { guint size = gst_caps_get_size (caps); guint i; for (i = 0; i < size; i++) { GstStructure *s = gst_caps_get_structure (caps, i); const GValue *formats = gst_structure_get_value (s, "format"); if (formats) { const GstVideoFormatInfo *info; if (GST_VALUE_HOLDS_LIST (formats)) { guint list_size = gst_value_list_get_size (formats); guint index; for (index = 0; index < list_size; index++) { const GValue *list_item = gst_value_list_get_value (formats, index); info = gst_video_format_get_info (gst_video_format_from_string (g_value_get_string (list_item))); if (GST_VIDEO_FORMAT_INFO_HAS_ALPHA (info)) return TRUE; } } else if (G_VALUE_HOLDS_STRING (formats)) { info = gst_video_format_get_info (gst_video_format_from_string (g_value_get_string (formats))); if (GST_VIDEO_FORMAT_INFO_HAS_ALPHA (info)) return TRUE; } else { g_assert_not_reached (); GST_WARNING ("Unexpected type for video 'format' field: %s", G_VALUE_TYPE_NAME (formats)); } } else { return TRUE; } } return FALSE; } static GstCaps * _get_non_alpha_caps (GstCaps * caps) { GstCaps *result; guint i, size; size = gst_caps_get_size (caps); result = gst_caps_new_empty (); for (i = 0; i < size; i++) { GstStructure *s = gst_caps_get_structure (caps, i); const GValue *formats = gst_structure_get_value (s, "format"); GValue new_formats = { 0, }; gboolean has_format = FALSE; /* FIXME what to do if formats are missing? */ if (formats) { const GstVideoFormatInfo *info; if (GST_VALUE_HOLDS_LIST (formats)) { guint list_size = gst_value_list_get_size (formats); guint index; g_value_init (&new_formats, GST_TYPE_LIST); for (index = 0; index < list_size; index++) { const GValue *list_item = gst_value_list_get_value (formats, index); info = gst_video_format_get_info (gst_video_format_from_string (g_value_get_string (list_item))); if (!GST_VIDEO_FORMAT_INFO_HAS_ALPHA (info)) { has_format = TRUE; gst_value_list_append_value (&new_formats, list_item); } } } else if (G_VALUE_HOLDS_STRING (formats)) { info = gst_video_format_get_info (gst_video_format_from_string (g_value_get_string (formats))); if (!GST_VIDEO_FORMAT_INFO_HAS_ALPHA (info)) { has_format = TRUE; gst_value_init_and_copy (&new_formats, formats); } } else { g_assert_not_reached (); GST_WARNING ("Unexpected type for video 'format' field: %s", G_VALUE_TYPE_NAME (formats)); } if (has_format) { s = gst_structure_copy (s); gst_structure_take_value (s, "format", &new_formats); gst_caps_append_structure (result, s); } } } return result; } static GstCaps * gst_video_aggregator_pad_sink_getcaps (GstPad * pad, GstVideoAggregator * vagg, GstCaps * filter) { GstCaps *srccaps; GstCaps *template_caps, *sink_template_caps; GstCaps *returned_caps; GstStructure *s; gint i, n; GstAggregator *agg = GST_AGGREGATOR (vagg); GstPad *srcpad = GST_PAD (agg->srcpad); gboolean has_alpha; GstVideoInterlaceMode interlace_mode; gboolean has_interlace_mode; template_caps = gst_pad_get_pad_template_caps (srcpad); GST_DEBUG_OBJECT (pad, "Get caps with filter: %" GST_PTR_FORMAT, filter); srccaps = gst_pad_peer_query_caps (srcpad, template_caps); srccaps = gst_caps_make_writable (srccaps); has_alpha = gst_video_aggregator_caps_has_alpha (srccaps); has_interlace_mode = gst_video_aggregator_get_sinkpads_interlace_mode (vagg, NULL, &interlace_mode); n = gst_caps_get_size (srccaps); for (i = 0; i < n; i++) { s = gst_caps_get_structure (srccaps, i); gst_structure_set (s, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL); if (GST_IS_VIDEO_AGGREGATOR_CONVERT_PAD (pad)) { gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT, "height", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL); gst_structure_remove_fields (s, "colorimetry", "chroma-site", "format", "pixel-aspect-ratio", NULL); } if (has_interlace_mode) gst_structure_set (s, "interlace-mode", G_TYPE_STRING, gst_video_interlace_mode_to_string (interlace_mode), NULL); } if (filter) { returned_caps = gst_caps_intersect (srccaps, filter); gst_caps_unref (srccaps); } else { returned_caps = srccaps; } sink_template_caps = gst_pad_get_pad_template_caps (pad); if (!has_alpha) { GstCaps *tmp = _get_non_alpha_caps (sink_template_caps); gst_caps_unref (sink_template_caps); sink_template_caps = tmp; } { GstCaps *intersect = gst_caps_intersect (returned_caps, sink_template_caps); gst_caps_unref (returned_caps); returned_caps = intersect; } gst_caps_unref (template_caps); gst_caps_unref (sink_template_caps); GST_DEBUG_OBJECT (pad, "Returning caps: %" GST_PTR_FORMAT, returned_caps); return returned_caps; } static void gst_video_aggregator_update_qos (GstVideoAggregator * vagg, gdouble proportion, GstClockTimeDiff diff, GstClockTime timestamp) { gboolean live; GST_DEBUG_OBJECT (vagg, "Updating QoS: proportion %lf, diff %" GST_STIME_FORMAT ", timestamp %" GST_TIME_FORMAT, proportion, GST_STIME_ARGS (diff), GST_TIME_ARGS (timestamp)); live = GST_CLOCK_TIME_IS_VALID (gst_aggregator_get_latency (GST_AGGREGATOR (vagg))); GST_OBJECT_LOCK (vagg); 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_video_aggregator_reset_qos (GstVideoAggregator * vagg) { gst_video_aggregator_update_qos (vagg, 0.5, 0, GST_CLOCK_TIME_NONE); vagg->priv->qos_processed = vagg->priv->qos_dropped = 0; } static void gst_video_aggregator_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_video_aggregator_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; vagg->priv->live = FALSE; GST_AGGREGATOR_PAD (agg->srcpad)->segment.position = -1; gst_video_aggregator_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->priv->buffer, NULL); p->priv->start_time = -1; p->priv->end_time = -1; gst_video_info_init (&p->info); } GST_OBJECT_UNLOCK (vagg); } static GstFlowReturn gst_video_aggregator_fill_queues (GstVideoAggregator * vagg, GstClockTime output_start_running_time, GstClockTime output_end_running_time) { GList *l; gboolean eos = TRUE; gboolean repeat_pad_eos = FALSE; gboolean has_no_repeat_pads = FALSE; gboolean need_more_data = FALSE; gboolean need_reconfigure = FALSE; /* get a set of buffers into pad->priv->buffer that are within output_start_running_time * and output_end_running_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; gboolean is_eos; bpad = GST_AGGREGATOR_PAD (pad); GST_OBJECT_LOCK (bpad); segment = bpad->segment; GST_OBJECT_UNLOCK (bpad); is_eos = gst_aggregator_pad_is_eos (bpad); if (!is_eos) eos = FALSE; if (!pad->priv->repeat_after_eos) has_no_repeat_pads = TRUE; buf = gst_aggregator_pad_peek_buffer (bpad); if (buf) { GstClockTime start_time, end_time; start_time = GST_BUFFER_TIMESTAMP (buf); if (start_time == -1) { gst_buffer_unref (buf); GST_ERROR_OBJECT (pad, "Need timestamped buffers!"); GST_OBJECT_UNLOCK (vagg); return GST_FLOW_ERROR; } /* FIXME: Make all this work with negative rates */ end_time = GST_BUFFER_DURATION (buf); if (end_time == -1) { start_time = MAX (start_time, segment.start); start_time = gst_segment_to_running_time (&segment, GST_FORMAT_TIME, start_time); if (start_time >= output_end_running_time) { if (pad->priv->buffer) { GST_DEBUG_OBJECT (pad, "buffer duration is -1, start_time >= " "output_end_running_time. Keeping previous buffer"); } else { GST_DEBUG_OBJECT (pad, "buffer duration is -1, start_time >= " "output_end_running_time. No previous buffer."); } gst_buffer_unref (buf); continue; } else if (start_time < output_start_running_time) { GST_DEBUG_OBJECT (pad, "buffer duration is -1, start_time < " "output_start_running_time. Discarding old buffer"); gst_buffer_replace (&pad->priv->buffer, buf); if (pad->priv->pending_vinfo.finfo) { pad->info = pad->priv->pending_vinfo; need_reconfigure = TRUE; pad->priv->pending_vinfo.finfo = NULL; } gst_buffer_unref (buf); gst_aggregator_pad_drop_buffer (bpad); pad->priv->start_time = start_time; need_more_data = TRUE; continue; } gst_buffer_unref (buf); buf = gst_aggregator_pad_pop_buffer (bpad); gst_buffer_replace (&pad->priv->buffer, buf); if (pad->priv->pending_vinfo.finfo) { pad->info = pad->priv->pending_vinfo; need_reconfigure = TRUE; pad->priv->pending_vinfo.finfo = NULL; } /* FIXME: Set end_time to something here? */ pad->priv->start_time = start_time; 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); gst_aggregator_pad_drop_buffer (bpad); 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); GST_TRACE_OBJECT (pad, "dealing with buffer %p start %" GST_TIME_FORMAT " end %" GST_TIME_FORMAT " out start %" GST_TIME_FORMAT " out end %" GST_TIME_FORMAT, buf, GST_TIME_ARGS (start_time), GST_TIME_ARGS (end_time), GST_TIME_ARGS (output_start_running_time), GST_TIME_ARGS (output_end_running_time)); if (pad->priv->end_time != -1 && pad->priv->end_time > end_time) { GST_DEBUG_OBJECT (pad, "Buffer from the past, dropping"); gst_buffer_unref (buf); gst_aggregator_pad_drop_buffer (bpad); continue; } if (end_time >= output_start_running_time && start_time < output_end_running_time) { GST_DEBUG_OBJECT (pad, "Taking new buffer with start time %" GST_TIME_FORMAT, GST_TIME_ARGS (start_time)); gst_buffer_replace (&pad->priv->buffer, buf); if (pad->priv->pending_vinfo.finfo) { pad->info = pad->priv->pending_vinfo; need_reconfigure = TRUE; pad->priv->pending_vinfo.finfo = NULL; } pad->priv->start_time = start_time; pad->priv->end_time = end_time; gst_buffer_unref (buf); gst_aggregator_pad_drop_buffer (bpad); eos = FALSE; } else if (start_time >= output_end_running_time) { GST_DEBUG_OBJECT (pad, "Keeping buffer until %" GST_TIME_FORMAT, GST_TIME_ARGS (start_time)); gst_buffer_unref (buf); eos = FALSE; } else { gst_buffer_replace (&pad->priv->buffer, buf); if (pad->priv->pending_vinfo.finfo) { pad->info = pad->priv->pending_vinfo; need_reconfigure = TRUE; pad->priv->pending_vinfo.finfo = NULL; } pad->priv->start_time = start_time; pad->priv->end_time = end_time; GST_DEBUG_OBJECT (pad, "replacing old buffer with a newer buffer, start %" GST_TIME_FORMAT " out end %" GST_TIME_FORMAT, GST_TIME_ARGS (start_time), GST_TIME_ARGS (output_end_running_time)); gst_buffer_unref (buf); gst_aggregator_pad_drop_buffer (bpad); need_more_data = TRUE; continue; } } else { if (is_eos && pad->priv->repeat_after_eos) { repeat_pad_eos = TRUE; GST_DEBUG_OBJECT (pad, "ignoring EOS and re-using previous buffer"); continue; } if (pad->priv->end_time != -1) { if (pad->priv->end_time <= output_start_running_time) { if (!is_eos) { GST_DEBUG_OBJECT (pad, "I just need more data"); if (GST_CLOCK_TIME_IS_VALID (pad->priv->max_last_buffer_repeat)) { if (output_start_running_time - pad->priv->end_time > pad->priv->max_last_buffer_repeat) { pad->priv->start_time = pad->priv->end_time = -1; gst_buffer_replace (&pad->priv->buffer, NULL); } } else { pad->priv->start_time = pad->priv->end_time = -1; } need_more_data = TRUE; } else { gst_buffer_replace (&pad->priv->buffer, NULL); pad->priv->start_time = pad->priv->end_time = -1; } } else if (is_eos) { eos = FALSE; } } else if (is_eos) { gst_buffer_replace (&pad->priv->buffer, NULL); } else if (pad->priv->start_time != -1) { /* When the current buffer didn't have a duration, but * max-last-buffer-repeat was set, we use start_time as * the comparison point */ if (pad->priv->start_time <= output_start_running_time) { if (GST_CLOCK_TIME_IS_VALID (pad->priv->max_last_buffer_repeat)) { if (output_start_running_time - pad->priv->start_time > pad->priv->max_last_buffer_repeat) { pad->priv->start_time = pad->priv->end_time = -1; gst_buffer_replace (&pad->priv->buffer, NULL); } } } } } } GST_OBJECT_UNLOCK (vagg); if (need_reconfigure) gst_pad_mark_reconfigure (GST_AGGREGATOR_SRC_PAD (vagg)); if (need_more_data) return GST_AGGREGATOR_FLOW_NEED_DATA; if (eos && !has_no_repeat_pads && repeat_pad_eos) eos = FALSE; if (eos) return GST_FLOW_EOS; return GST_FLOW_OK; } static gboolean sync_pad_values (GstElement * vagg, GstPad * pad, gpointer user_data) { gint64 *out_stream_time = user_data; /* sync object properties on stream time */ if (GST_CLOCK_TIME_IS_VALID (*out_stream_time)) gst_object_sync_values (GST_OBJECT_CAST (pad), *out_stream_time); return TRUE; } static gboolean prepare_frames (GstElement * agg, GstPad * pad, gpointer user_data) { GstVideoAggregatorPad *vpad = GST_VIDEO_AGGREGATOR_PAD_CAST (pad); GstVideoAggregatorPadClass *vaggpad_class = GST_VIDEO_AGGREGATOR_PAD_GET_CLASS (pad); memset (&vpad->priv->prepared_frame, 0, sizeof (GstVideoFrame)); if (vpad->priv->buffer == NULL || !vaggpad_class->prepare_frame) return TRUE; /* GAP event, nothing to do */ if (vpad->priv->buffer && gst_buffer_get_size (vpad->priv->buffer) == 0 && GST_BUFFER_FLAG_IS_SET (vpad->priv->buffer, GST_BUFFER_FLAG_GAP)) { return TRUE; } return vaggpad_class->prepare_frame (vpad, GST_VIDEO_AGGREGATOR_CAST (agg), vpad->priv->buffer, &vpad->priv->prepared_frame); } static gboolean clean_pad (GstElement * agg, GstPad * pad, gpointer user_data) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR_CAST (agg); GstVideoAggregatorPad *vpad = GST_VIDEO_AGGREGATOR_PAD_CAST (pad); GstVideoAggregatorPadClass *vaggpad_class = GST_VIDEO_AGGREGATOR_PAD_GET_CLASS (pad); if (vaggpad_class->clean_frame) vaggpad_class->clean_frame (vpad, vagg, &vpad->priv->prepared_frame); memset (&vpad->priv->prepared_frame, 0, sizeof (GstVideoFrame)); return TRUE; } static GstFlowReturn gst_video_aggregator_do_aggregate (GstVideoAggregator * vagg, GstClockTime output_start_time, GstClockTime output_end_time, GstBuffer ** outbuf) { GstAggregator *agg = GST_AGGREGATOR (vagg); GstFlowReturn ret = GST_FLOW_OK; GstElementClass *klass = GST_ELEMENT_GET_CLASS (vagg); GstVideoAggregatorClass *vagg_klass = (GstVideoAggregatorClass *) klass; GstClockTime out_stream_time; g_assert (vagg_klass->aggregate_frames != NULL); g_assert (vagg_klass->create_output_buffer != NULL); if ((ret = vagg_klass->create_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; } if (*outbuf == NULL) { /* sub-class doesn't want to generate output right now */ return GST_FLOW_OK; } GST_BUFFER_TIMESTAMP (*outbuf) = output_start_time; GST_BUFFER_DURATION (*outbuf) = output_end_time - output_start_time; GST_OBJECT_LOCK (agg->srcpad); out_stream_time = gst_segment_to_stream_time (&GST_AGGREGATOR_PAD (agg->srcpad)->segment, GST_FORMAT_TIME, output_start_time); GST_OBJECT_UNLOCK (agg->srcpad); /* Sync pad properties to the stream time */ gst_element_foreach_sink_pad (GST_ELEMENT_CAST (vagg), sync_pad_values, &out_stream_time); /* Convert all the frames the subclass has before aggregating */ gst_element_foreach_sink_pad (GST_ELEMENT_CAST (vagg), prepare_frames, NULL); ret = vagg_klass->aggregate_frames (vagg, *outbuf); gst_element_foreach_sink_pad (GST_ELEMENT_CAST (vagg), 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_video_aggregator_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_video_aggregator_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 (&GST_AGGREGATOR_PAD (agg->srcpad)->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 void gst_video_aggregator_advance_on_timeout (GstVideoAggregator * vagg) { GstAggregator *agg = GST_AGGREGATOR (vagg); guint64 frame_duration; gint fps_d, fps_n; GstSegment *agg_segment = &GST_AGGREGATOR_PAD (agg->srcpad)->segment; GST_OBJECT_LOCK (agg); if (agg_segment->position == -1) { if (agg_segment->rate > 0.0) agg_segment->position = agg_segment->start; else agg_segment->position = agg_segment->stop; } /* Advance position */ fps_d = GST_VIDEO_INFO_FPS_D (&vagg->info) ? GST_VIDEO_INFO_FPS_D (&vagg->info) : 1; fps_n = GST_VIDEO_INFO_FPS_N (&vagg->info) ? GST_VIDEO_INFO_FPS_N (&vagg->info) : 25; /* Default to 25/1 if no "best fps" is known */ frame_duration = gst_util_uint64_scale (GST_SECOND, fps_d, fps_n); if (agg_segment->rate > 0.0) agg_segment->position += frame_duration; else if (agg_segment->position > frame_duration) agg_segment->position -= frame_duration; else agg_segment->position = 0; vagg->priv->nframes++; GST_OBJECT_UNLOCK (agg); } static GstFlowReturn gst_video_aggregator_aggregate (GstAggregator * agg, gboolean timeout) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); GstClockTime output_start_time, output_end_time; GstClockTime output_start_running_time, output_end_running_time; GstBuffer *outbuf = NULL; GstFlowReturn flow_ret; gint64 jitter; GstSegment *agg_segment = &GST_AGGREGATOR_PAD (agg->srcpad)->segment; GST_VIDEO_AGGREGATOR_LOCK (vagg); if (GST_VIDEO_INFO_FORMAT (&vagg->info) == GST_VIDEO_FORMAT_UNKNOWN) { if (timeout) gst_video_aggregator_advance_on_timeout (vagg); flow_ret = GST_AGGREGATOR_FLOW_NEED_DATA; goto unlock_and_return; } output_start_time = agg_segment->position; if (agg_segment->position == -1 || agg_segment->position < agg_segment->start) output_start_time = agg_segment->start; if (vagg->priv->nframes == 0) { vagg->priv->ts_offset = output_start_time; GST_DEBUG_OBJECT (vagg, "New ts offset %" GST_TIME_FORMAT, GST_TIME_ARGS (output_start_time)); } if (GST_VIDEO_INFO_FPS_N (&vagg->info) == 0) { output_end_time = -1; } else { 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)); } if (agg_segment->stop != -1) output_end_time = MIN (output_end_time, agg_segment->stop); output_start_running_time = gst_segment_to_running_time (agg_segment, GST_FORMAT_TIME, output_start_time); output_end_running_time = gst_segment_to_running_time (agg_segment, GST_FORMAT_TIME, output_end_time); if (output_end_time == output_start_time) { flow_ret = GST_FLOW_EOS; } else { flow_ret = gst_video_aggregator_fill_queues (vagg, output_start_running_time, output_end_running_time); } if (flow_ret == GST_AGGREGATOR_FLOW_NEED_DATA && !timeout) { GST_DEBUG_OBJECT (vagg, "Need more data for decisions"); goto unlock_and_return; } else if (flow_ret == GST_FLOW_EOS) { GST_DEBUG_OBJECT (vagg, "All sinkpads are EOS -- forwarding"); goto unlock_and_return; } else if (flow_ret == GST_FLOW_ERROR) { GST_WARNING_OBJECT (vagg, "Error collecting buffers"); goto unlock_and_return; } /* It is possible that gst_video_aggregator_fill_queues() marked the pad * for reconfiguration. In this case we have to reconfigure before continuing * because we have picked a new buffer with different caps than before from * one one of the sink pads and continuing here may lead to a crash. * https://bugzilla.gnome.org/show_bug.cgi?id=780682 */ if (gst_pad_needs_reconfigure (GST_AGGREGATOR_SRC_PAD (vagg))) { GST_DEBUG_OBJECT (vagg, "Need reconfigure"); flow_ret = GST_AGGREGATOR_FLOW_NEED_DATA; goto unlock_and_return; } GST_DEBUG_OBJECT (vagg, "Producing buffer for %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT ", running time start %" GST_TIME_FORMAT ", running time end %" GST_TIME_FORMAT, GST_TIME_ARGS (output_start_time), GST_TIME_ARGS (output_end_time), GST_TIME_ARGS (output_start_running_time), GST_TIME_ARGS (output_end_running_time)); jitter = gst_video_aggregator_do_qos (vagg, output_start_time); if (jitter <= 0) { flow_ret = gst_video_aggregator_do_aggregate (vagg, output_start_time, output_end_time, &outbuf); if (flow_ret != GST_FLOW_OK) goto done; vagg->priv->qos_processed++; } else { GstMessage *msg; vagg->priv->qos_dropped++; msg = gst_message_new_qos (GST_OBJECT_CAST (vagg), vagg->priv->live, output_start_running_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); flow_ret = GST_FLOW_OK; } 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))); flow_ret = gst_aggregator_finish_buffer (agg, outbuf); } GST_VIDEO_AGGREGATOR_LOCK (vagg); vagg->priv->nframes++; agg_segment->position = output_end_time; GST_VIDEO_AGGREGATOR_UNLOCK (vagg); return flow_ret; done: if (outbuf) gst_buffer_unref (outbuf); unlock_and_return: GST_VIDEO_AGGREGATOR_UNLOCK (vagg); return flow_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_video_aggregator_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_video_aggregator_src_query (GstAggregator * agg, GstQuery * query) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); gboolean res = FALSE; GstSegment *agg_segment = &GST_AGGREGATOR_PAD (agg->srcpad)->segment; 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_video_aggregator_query_duration (vagg, query); break; case GST_QUERY_LATENCY: res = GST_AGGREGATOR_CLASS (gst_video_aggregator_parent_class)->src_query (agg, query); if (res) { gst_query_parse_latency (query, &vagg->priv->live, NULL, NULL); } break; default: res = GST_AGGREGATOR_CLASS (gst_video_aggregator_parent_class)->src_query (agg, query); break; } return res; } static gboolean gst_video_aggregator_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_video_aggregator_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_video_aggregator_parent_class)->src_event (agg, event); } static GstFlowReturn gst_video_aggregator_flush (GstAggregator * agg) { GList *l; gdouble abs_rate; GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); GstSegment *agg_segment = &GST_AGGREGATOR_PAD (agg->srcpad)->segment; GST_INFO_OBJECT (agg, "Flushing"); GST_OBJECT_LOCK (vagg); abs_rate = ABS (agg_segment->rate); 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->priv->buffer) { p->priv->start_time /= ABS (agg_segment->rate); p->priv->end_time /= ABS (agg_segment->rate); } if (abs_rate != 1.0 && p->priv->buffer) { p->priv->start_time *= abs_rate; p->priv->end_time *= abs_rate; } } } GST_OBJECT_UNLOCK (vagg); agg_segment->position = -1; vagg->priv->ts_offset = 0; vagg->priv->nframes = 0; gst_video_aggregator_reset_qos (vagg); return GST_FLOW_OK; } static gboolean gst_video_aggregator_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_video_aggregator_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_video_aggregator_reset_qos (vagg); break; } default: break; } if (event != NULL) return GST_AGGREGATOR_CLASS (gst_video_aggregator_parent_class)->sink_event (agg, bpad, event); return ret; } static gboolean gst_video_aggregator_start (GstAggregator * agg) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); gst_caps_replace (&vagg->priv->current_caps, NULL); return TRUE; } static gboolean gst_video_aggregator_stop (GstAggregator * agg) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); gst_video_aggregator_reset (vagg); return TRUE; } /* GstElement vmethods */ static GstPad * gst_video_aggregator_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_video_aggregator_parent_class)->request_new_pad (element, templ, req_name, caps); if (vaggpad == NULL) return NULL; GST_OBJECT_LOCK (vagg); vaggpad->priv->zorder = GST_ELEMENT (vagg)->numsinkpads; vaggpad->priv->start_time = -1; vaggpad->priv->end_time = -1; element->sinkpads = g_list_sort (element->sinkpads, (GCompareFunc) pad_zorder_compare); GST_OBJECT_UNLOCK (vagg); return GST_PAD (vaggpad); } static void gst_video_aggregator_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_video_aggregator_reset (vagg); gst_buffer_replace (&vaggpad->priv->buffer, NULL); GST_ELEMENT_CLASS (gst_video_aggregator_parent_class)->release_pad (GST_ELEMENT (vagg), pad); gst_pad_mark_reconfigure (GST_AGGREGATOR_SRC_PAD (vagg)); GST_VIDEO_AGGREGATOR_UNLOCK (vagg); return; } static gboolean gst_video_aggregator_propose_allocation (GstAggregator * agg, GstAggregatorPad * pad, GstQuery * decide_query, GstQuery * query) { gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL); return TRUE; } static gboolean gst_video_aggregator_decide_allocation (GstAggregator * agg, GstQuery * query) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); GstAllocationParams params = { 0, 15, 0, 0 }; guint i; GstBufferPool *pool; GstAllocator *allocator; guint size, min, max; gboolean update = FALSE; GstStructure *config = NULL; GstCaps *caps = NULL; if (gst_query_get_n_allocation_params (query) == 0) { gst_query_add_allocation_param (query, NULL, ¶ms); } else { for (i = 0; i < gst_query_get_n_allocation_params (query); i++) { GstAllocator *allocator; gst_query_parse_nth_allocation_param (query, i, &allocator, ¶ms); params.align = MAX (params.align, 15); gst_query_set_nth_allocation_param (query, i, allocator, ¶ms); } } gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms); if (gst_query_get_n_allocation_pools (query) > 0) { gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max); /* adjust size */ size = MAX (size, vagg->info.size); update = TRUE; } else { pool = NULL; size = vagg->info.size; min = max = 0; update = FALSE; } gst_query_parse_allocation (query, &caps, NULL); /* no downstream pool, make our own */ if (pool == NULL) pool = gst_video_buffer_pool_new (); config = gst_buffer_pool_get_config (pool); gst_buffer_pool_config_set_params (config, caps, size, min, max); gst_buffer_pool_config_set_allocator (config, allocator, ¶ms); if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) { gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META); } /* buffer pool may have to do some changes */ if (!gst_buffer_pool_set_config (pool, config)) { config = gst_buffer_pool_get_config (pool); /* If change are not acceptable, fallback to generic pool */ if (!gst_buffer_pool_config_validate_params (config, caps, size, min, max)) { GST_DEBUG_OBJECT (agg, "unsupported pool, making new pool"); gst_object_unref (pool); pool = gst_video_buffer_pool_new (); gst_buffer_pool_config_set_params (config, caps, size, min, max); gst_buffer_pool_config_set_allocator (config, allocator, ¶ms); if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) { gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META); } } if (!gst_buffer_pool_set_config (pool, config)) goto config_failed; } if (update) gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max); else gst_query_add_allocation_pool (query, pool, size, min, max); if (pool) gst_object_unref (pool); if (allocator) gst_object_unref (allocator); return TRUE; config_failed: if (pool) gst_object_unref (pool); if (allocator) gst_object_unref (allocator); GST_ELEMENT_ERROR (agg, RESOURCE, SETTINGS, ("Failed to configure the buffer pool"), ("Configuration is most likely invalid, please report this issue.")); return FALSE; } static GstFlowReturn gst_video_aggregator_create_output_buffer (GstVideoAggregator * videoaggregator, GstBuffer ** outbuf) { GstAggregator *aggregator = GST_AGGREGATOR (videoaggregator); GstBufferPool *pool; GstFlowReturn ret = GST_FLOW_OK; pool = gst_aggregator_get_buffer_pool (aggregator); if (pool) { if (!gst_buffer_pool_is_active (pool)) { if (!gst_buffer_pool_set_active (pool, TRUE)) { GST_ELEMENT_ERROR (videoaggregator, RESOURCE, SETTINGS, ("failed to activate bufferpool"), ("failed to activate bufferpool")); return GST_FLOW_ERROR; } } ret = gst_buffer_pool_acquire_buffer (pool, outbuf, NULL); gst_object_unref (pool); } else { guint outsize; GstAllocator *allocator; GstAllocationParams params; gst_aggregator_get_allocator (aggregator, &allocator, ¶ms); outsize = GST_VIDEO_INFO_SIZE (&videoaggregator->info); *outbuf = gst_buffer_new_allocate (allocator, outsize, ¶ms); if (allocator) gst_object_unref (allocator); if (*outbuf == NULL) { GST_ELEMENT_ERROR (videoaggregator, RESOURCE, NO_SPACE_LEFT, (NULL), ("Could not acquire buffer of size: %d", outsize)); ret = GST_FLOW_ERROR; } } return ret; } static gboolean gst_video_aggregator_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, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL); if (GST_IS_VIDEO_AGGREGATOR_CONVERT_PAD (pad)) { gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT, "height", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL); gst_structure_remove_fields (s, "colorimetry", "chroma-site", "format", "pixel-aspect-ratio", 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_video_aggregator_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_video_aggregator_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_video_aggregator_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_video_aggregator_parent_class)->sink_query (agg, bpad, query); break; } return ret; } /* GObject vmethods */ static void gst_video_aggregator_finalize (GObject * o) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (o); g_mutex_clear (&vagg->priv->lock); G_OBJECT_CLASS (gst_video_aggregator_parent_class)->finalize (o); } static void gst_video_aggregator_dispose (GObject * o) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (o); gst_caps_replace (&vagg->priv->current_caps, NULL); G_OBJECT_CLASS (gst_video_aggregator_parent_class)->dispose (o); } static void gst_video_aggregator_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_video_aggregator_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_video_aggregator_class_init (GstVideoAggregatorClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GstElementClass *gstelement_class = (GstElementClass *) klass; GstAggregatorClass *agg_class = (GstAggregatorClass *) klass; GST_DEBUG_CATEGORY_INIT (gst_video_aggregator_debug, "videoaggregator", 0, "base video aggregator"); gst_video_aggregator_parent_class = g_type_class_peek_parent (klass); if (video_aggregator_private_offset != 0) g_type_class_adjust_private_offset (klass, &video_aggregator_private_offset); gobject_class->finalize = gst_video_aggregator_finalize; gobject_class->dispose = gst_video_aggregator_dispose; gobject_class->get_property = gst_video_aggregator_get_property; gobject_class->set_property = gst_video_aggregator_set_property; gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR (gst_video_aggregator_request_new_pad); gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_video_aggregator_release_pad); agg_class->start = gst_video_aggregator_start; agg_class->stop = gst_video_aggregator_stop; agg_class->sink_query = gst_video_aggregator_sink_query; agg_class->sink_event = gst_video_aggregator_sink_event; agg_class->flush = gst_video_aggregator_flush; agg_class->aggregate = gst_video_aggregator_aggregate; agg_class->src_event = gst_video_aggregator_src_event; agg_class->src_query = gst_video_aggregator_src_query; agg_class->get_next_time = gst_aggregator_simple_get_next_time; agg_class->update_src_caps = gst_video_aggregator_default_update_src_caps; agg_class->fixate_src_caps = gst_video_aggregator_default_fixate_src_caps; agg_class->negotiated_src_caps = gst_video_aggregator_default_negotiated_src_caps; agg_class->decide_allocation = gst_video_aggregator_decide_allocation; agg_class->propose_allocation = gst_video_aggregator_propose_allocation; klass->find_best_format = gst_video_aggregator_find_best_format; klass->create_output_buffer = gst_video_aggregator_create_output_buffer; klass->update_caps = gst_video_aggregator_default_update_caps; /* Register the pad class */ g_type_class_ref (GST_TYPE_VIDEO_AGGREGATOR_PAD); } static void gst_video_aggregator_init (GstVideoAggregator * vagg, GstVideoAggregatorClass * klass) { vagg->priv = gst_video_aggregator_get_instance_private (vagg); vagg->priv->current_caps = NULL; g_mutex_init (&vagg->priv->lock); /* initialize variables */ gst_video_aggregator_reset (vagg); }