/* Generic video mixer 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:element-videomixer * * Videomixer2 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. * * Videomixer will do colorspace conversion. * * Individual parameters for each input stream can be configured on the * #GstVideoMixer2Pad. * * * Sample pipelines * |[ * gst-launch-1.0 \ * videotestsrc pattern=1 ! \ * video/x-raw,format=AYUV,framerate=\(fraction\)10/1,width=100,height=100 ! \ * videobox border-alpha=0 top=-70 bottom=-70 right=-220 ! \ * videomixer name=mix sink_0::alpha=0.7 sink_1::alpha=0.5 ! \ * videoconvert ! xvimagesink \ * videotestsrc ! \ * video/x-raw,format=AYUV,framerate=\(fraction\)5/1,width=320,height=240 ! mix. * ]| A pipeline to demonstrate videomixer used together with videobox. * This should show a 320x240 pixels video test source with some transparency * showing the background checker pattern. Another video test source with just * the snow pattern of 100x100 pixels is overlayed on top of the first one on * the left vertically centered with a small transparency showing the first * video test source behind and the checker pattern under it. Note that the * framerate of the output video is 10 frames per second. * |[ * gst-launch-1.0 videotestsrc pattern=1 ! \ * video/x-raw, framerate=\(fraction\)10/1, width=100, height=100 ! \ * videomixer name=mix ! videoconvert ! ximagesink \ * videotestsrc ! \ * video/x-raw, framerate=\(fraction\)5/1, width=320, height=240 ! mix. * ]| A pipeline to demostrate bgra mixing. (This does not demonstrate alpha blending). * |[ * gst-launch-1.0 videotestsrc pattern=1 ! \ * video/x-raw,format =I420, framerate=\(fraction\)10/1, width=100, height=100 ! \ * videomixer name=mix ! videoconvert ! ximagesink \ * videotestsrc ! \ * video/x-raw,format=I420, framerate=\(fraction\)5/1, width=320, height=240 ! mix. * ]| A pipeline to test I420 * |[ * gst-launch-1.0 videomixer name=mixer sink_1::alpha=0.5 sink_1::xpos=50 sink_1::ypos=50 ! \ * videoconvert ! ximagesink \ * videotestsrc pattern=snow timestamp-offset=3000000000 ! \ * "video/x-raw,format=AYUV,width=640,height=480,framerate=(fraction)30/1" ! \ * timeoverlay ! queue2 ! mixer. \ * videotestsrc pattern=smpte ! \ * "video/x-raw,format=AYUV,width=800,height=600,framerate=(fraction)10/1" ! \ * timeoverlay ! queue2 ! mixer. * ]| A pipeline to demonstrate synchronized mixing (the second stream starts after 3 seconds) * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "videomixer2.h" #include "videomixer2pad.h" #ifdef DISABLE_ORC #define orc_memset memset #else #include #endif GST_DEBUG_CATEGORY_STATIC (gst_videomixer2_debug); #define GST_CAT_DEFAULT gst_videomixer2_debug #define GST_VIDEO_MIXER2_GET_LOCK(mix) \ (&GST_VIDEO_MIXER2(mix)->lock) #define GST_VIDEO_MIXER2_LOCK(mix) \ (g_mutex_lock(GST_VIDEO_MIXER2_GET_LOCK (mix))) #define GST_VIDEO_MIXER2_UNLOCK(mix) \ (g_mutex_unlock(GST_VIDEO_MIXER2_GET_LOCK (mix))) #define GST_VIDEO_MIXER2_GET_SETCAPS_LOCK(mix) \ (&GST_VIDEO_MIXER2(mix)->setcaps_lock) #define GST_VIDEO_MIXER2_SETCAPS_LOCK(mix) \ (g_mutex_lock(GST_VIDEO_MIXER2_GET_SETCAPS_LOCK (mix))) #define GST_VIDEO_MIXER2_SETCAPS_UNLOCK(mix) \ (g_mutex_unlock(GST_VIDEO_MIXER2_GET_SETCAPS_LOCK (mix))) #define FORMATS " { AYUV, BGRA, ARGB, RGBA, ABGR, Y444, Y42B, YUY2, UYVY, "\ " YVYU, I420, YV12, NV12, NV21, Y41B, RGB, BGR, xRGB, xBGR, "\ " RGBx, BGRx } " static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (FORMATS)) ); static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u", GST_PAD_SINK, GST_PAD_REQUEST, GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (FORMATS)) ); static void gst_videomixer2_child_proxy_init (gpointer g_iface, gpointer iface_data); static gboolean gst_videomixer2_push_sink_event (GstVideoMixer2 * mix, GstEvent * event); static void gst_videomixer2_release_pad (GstElement * element, GstPad * pad); static void gst_videomixer2_reset_qos (GstVideoMixer2 * mix); struct _GstVideoMixer2Collect { GstCollectData collect; /* we extend the CollectData */ GstVideoMixer2Pad *mixpad; GstBuffer *queued; /* buffer for which we don't know the end time yet */ GstVideoInfo queued_vinfo; GstBuffer *buffer; /* buffer that should be blended now */ GstVideoInfo buffer_vinfo; GstClockTime start_time; GstClockTime end_time; }; #define DEFAULT_PAD_ZORDER 0 #define DEFAULT_PAD_XPOS 0 #define DEFAULT_PAD_YPOS 0 #define DEFAULT_PAD_ALPHA 1.0 enum { PROP_PAD_0, PROP_PAD_ZORDER, PROP_PAD_XPOS, PROP_PAD_YPOS, PROP_PAD_ALPHA }; G_DEFINE_TYPE (GstVideoMixer2Pad, gst_videomixer2_pad, GST_TYPE_PAD); static void gst_videomixer2_collect_free (GstCollectData * data) { GstVideoMixer2Collect *cdata = (GstVideoMixer2Collect *) data; gst_buffer_replace (&cdata->buffer, NULL); } static gboolean gst_videomixer2_src_setcaps (GstPad * pad, GstVideoMixer2 * mix, GstCaps * caps); static gboolean gst_videomixer2_update_src_caps (GstVideoMixer2 * mix) { GSList *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; GST_VIDEO_MIXER2_SETCAPS_LOCK (mix); GST_VIDEO_MIXER2_LOCK (mix); for (l = mix->sinkpads; l; l = l->next) { GstVideoMixer2Pad *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 + MAX (mpad->xpos, 0); this_height = height + MAX (mpad->ypos, 0); 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; } } 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; GstStructure *s; GstVideoInfo info; if (GST_VIDEO_INFO_FPS_N (&mix->info) != best_fps_n || GST_VIDEO_INFO_FPS_D (&mix->info) != best_fps_d) { if (mix->segment.position != -1) { mix->ts_offset = mix->segment.position - mix->segment.start; mix->nframes = 0; } } gst_video_info_init (&info); gst_video_info_set_format (&info, GST_VIDEO_INFO_FORMAT (&mix->info), best_width, best_height); info.fps_n = best_fps_n; info.fps_d = best_fps_d; info.par_n = GST_VIDEO_INFO_PAR_N (&mix->info); info.par_d = GST_VIDEO_INFO_PAR_D (&mix->info); caps = gst_video_info_to_caps (&info); peercaps = gst_pad_peer_query_caps (mix->srcpad, NULL); if (peercaps && !gst_caps_can_intersect (peercaps, caps)) { GstCaps *tmp; s = gst_caps_get_structure (caps, 0); 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_caps_unref (caps); gst_caps_unref (peercaps); caps = tmp; if (gst_caps_is_empty (caps)) { GST_DEBUG_OBJECT (mix, "empty caps"); ret = FALSE; GST_VIDEO_MIXER2_UNLOCK (mix); 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); gst_structure_get_int (s, "width", &info.width); gst_structure_get_int (s, "height", &info.height); gst_structure_get_fraction (s, "fraction", &info.fps_n, &info.fps_d); } gst_caps_unref (caps); caps = gst_video_info_to_caps (&info); GST_VIDEO_MIXER2_UNLOCK (mix); ret = gst_videomixer2_src_setcaps (mix->srcpad, mix, caps); gst_caps_unref (caps); } else { GST_VIDEO_MIXER2_UNLOCK (mix); } done: GST_VIDEO_MIXER2_SETCAPS_UNLOCK (mix); return ret; } static gboolean gst_videomixer2_update_converters (GstVideoMixer2 * mix) { GSList *tmp; GstVideoFormat best_format; GstVideoInfo best_info; GstVideoMixer2Pad *pad; gboolean need_alpha = FALSE; gboolean at_least_one_alpha = FALSE; GstCaps *downstream_caps; GstCaps *possible_caps; gchar *best_colorimetry; const gchar *best_chroma; GHashTable *formats_table; gint best_format_number = 0; best_format = GST_VIDEO_FORMAT_UNKNOWN; gst_video_info_init (&best_info); downstream_caps = gst_pad_get_allowed_caps (mix->srcpad); if (!downstream_caps || gst_caps_is_empty (downstream_caps)) { if (downstream_caps) gst_caps_unref (downstream_caps); return FALSE; } formats_table = g_hash_table_new (g_direct_hash, g_direct_equal); /* first find new preferred format */ for (tmp = mix->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 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_format = GST_VIDEO_INFO_FORMAT (&pad->info); best_info = pad->info; best_format_number = format_number; } else if (format_number > best_format_number) { best_format = GST_VIDEO_INFO_FORMAT (&pad->info); best_info = pad->info; best_format_number = format_number; } } g_hash_table_unref (formats_table); 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 (mix, 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 mixer")); return FALSE; } best_colorimetry = gst_video_colorimetry_to_string (&(best_info.colorimetry)); best_chroma = gst_video_chroma_to_string (best_info.chroma_site); if (GST_VIDEO_INFO_FPS_N (&mix->info) != GST_VIDEO_INFO_FPS_N (&best_info) || GST_VIDEO_INFO_FPS_D (&mix->info) != GST_VIDEO_INFO_FPS_D (&best_info)) { if (mix->segment.position != -1) { mix->ts_offset = mix->segment.position - mix->segment.start; mix->nframes = 0; } else { mix->ts_offset += gst_util_uint64_scale_round (mix->nframes, GST_SECOND * GST_VIDEO_INFO_FPS_D (&mix->info), GST_VIDEO_INFO_FPS_N (&mix->info)); mix->nframes = 0; } } mix->info = best_info; GST_DEBUG_OBJECT (mix, "The output format will now be : %d with colorimetry : %s and chroma : %s", best_format, best_colorimetry, best_chroma); /* Then browse the sinks once more, setting or unsetting conversion if needed */ for (tmp = mix->sinkpads; tmp; tmp = tmp->next) { gchar *colorimetry; const gchar *chroma; pad = tmp->data; if (!pad->info.finfo) continue; if (GST_VIDEO_INFO_FORMAT (&pad->info) == GST_VIDEO_FORMAT_UNKNOWN) continue; if (pad->convert) gst_video_converter_free (pad->convert); pad->convert = NULL; colorimetry = gst_video_colorimetry_to_string (&(pad->info.colorimetry)); chroma = gst_video_chroma_to_string (pad->info.chroma_site); if (best_format != GST_VIDEO_INFO_FORMAT (&pad->info) || g_strcmp0 (colorimetry, best_colorimetry) || g_strcmp0 (chroma, best_chroma)) { GstVideoInfo tmp_info = pad->info; tmp_info.finfo = best_info.finfo; tmp_info.chroma_site = best_info.chroma_site; tmp_info.colorimetry = best_info.colorimetry; GST_DEBUG_OBJECT (pad, "This pad will be converted from %d to %d", GST_VIDEO_INFO_FORMAT (&pad->info), GST_VIDEO_INFO_FORMAT (&best_info)); pad->convert = gst_video_converter_new (&pad->info, &tmp_info, NULL); pad->need_conversion_update = TRUE; if (!pad->convert) { g_free (colorimetry); g_free (best_colorimetry); GST_WARNING ("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 gboolean gst_videomixer2_pad_sink_setcaps (GstPad * pad, GstObject * parent, GstCaps * caps) { GstVideoMixer2 *mix; GstVideoMixer2Pad *mixpad; GstVideoInfo info; gboolean ret = FALSE; GST_INFO_OBJECT (pad, "Setting caps %" GST_PTR_FORMAT, caps); mix = GST_VIDEO_MIXER2 (parent); mixpad = GST_VIDEO_MIXER2_PAD (pad); if (!gst_video_info_from_caps (&info, caps)) { GST_ERROR_OBJECT (pad, "Failed to parse caps"); goto beach; } GST_VIDEO_MIXER2_LOCK (mix); if (GST_VIDEO_INFO_FORMAT (&mix->info) != GST_VIDEO_FORMAT_UNKNOWN) { if (GST_VIDEO_INFO_PAR_N (&mix->info) != GST_VIDEO_INFO_PAR_N (&info) || GST_VIDEO_INFO_PAR_D (&mix->info) != GST_VIDEO_INFO_PAR_D (&info) || GST_VIDEO_INFO_INTERLACE_MODE (&mix->info) != GST_VIDEO_INFO_INTERLACE_MODE (&info)) { GST_DEBUG_OBJECT (pad, "got input caps %" GST_PTR_FORMAT ", but " "current caps are %" GST_PTR_FORMAT, caps, mix->current_caps); GST_VIDEO_MIXER2_UNLOCK (mix); return FALSE; } } mixpad->info = info; GST_COLLECT_PADS_STREAM_LOCK (mix->collect); ret = gst_videomixer2_update_converters (mix); GST_VIDEO_MIXER2_UNLOCK (mix); if (ret) ret = gst_videomixer2_update_src_caps (mix); GST_COLLECT_PADS_STREAM_UNLOCK (mix->collect); beach: return ret; } static GstCaps * gst_videomixer2_pad_sink_getcaps (GstPad * pad, GstVideoMixer2 * mix, GstCaps * filter) { GstCaps *srccaps; GstCaps *template_caps; GstCaps *filtered_caps; GstCaps *returned_caps; GstStructure *s; gboolean had_current_caps = TRUE; gint i, n; template_caps = gst_pad_get_pad_template_caps (GST_PAD (mix->srcpad)); srccaps = gst_pad_get_current_caps (GST_PAD (mix->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 gboolean gst_videomixer2_pad_sink_acceptcaps (GstPad * pad, GstVideoMixer2 * mix, GstCaps * caps) { gboolean ret; GstCaps *modified_caps; GstCaps *accepted_caps; GstCaps *template_caps; gboolean had_current_caps = TRUE; gint i, n; GstStructure *s; GST_DEBUG_OBJECT (pad, "%" GST_PTR_FORMAT, caps); accepted_caps = gst_pad_get_current_caps (GST_PAD (mix->srcpad)); template_caps = gst_pad_get_pad_template_caps (GST_PAD (mix->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_DEBUG_OBJECT (pad, "acceptable caps are %" GST_PTR_FORMAT, accepted_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_videomixer2_sink_query (GstCollectPads * pads, GstCollectData * cdata, GstQuery * query, GstVideoMixer2 * mix) { GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (cdata->pad); gboolean ret = FALSE; switch (GST_QUERY_TYPE (query)) { case GST_QUERY_CAPS: { GstCaps *filter, *caps; gst_query_parse_caps (query, &filter); caps = gst_videomixer2_pad_sink_getcaps (GST_PAD (pad), mix, 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_videomixer2_pad_sink_acceptcaps (GST_PAD (pad), mix, caps); gst_query_set_accept_caps_result (query, ret); ret = TRUE; break; } default: ret = gst_collect_pads_query_default (pads, cdata, query, FALSE); break; } return ret; } static void gst_videomixer2_pad_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (object); switch (prop_id) { case PROP_PAD_ZORDER: g_value_set_uint (value, pad->zorder); break; case PROP_PAD_XPOS: g_value_set_int (value, pad->xpos); break; case PROP_PAD_YPOS: g_value_set_int (value, pad->ypos); break; case PROP_PAD_ALPHA: g_value_set_double (value, pad->alpha); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static int pad_zorder_compare (const GstVideoMixer2Pad * pad1, const GstVideoMixer2Pad * pad2) { return pad1->zorder - pad2->zorder; } static void gst_videomixer2_pad_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (object); GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (GST_PAD (pad))); switch (prop_id) { case PROP_PAD_ZORDER: GST_VIDEO_MIXER2_LOCK (mix); pad->zorder = g_value_get_uint (value); mix->sinkpads = g_slist_sort (mix->sinkpads, (GCompareFunc) pad_zorder_compare); GST_VIDEO_MIXER2_UNLOCK (mix); break; case PROP_PAD_XPOS: pad->xpos = g_value_get_int (value); break; case PROP_PAD_YPOS: pad->ypos = g_value_get_int (value); break; case PROP_PAD_ALPHA: pad->alpha = g_value_get_double (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } gst_object_unref (mix); } static void gst_videomixer2_pad_class_init (GstVideoMixer2PadClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; gobject_class->set_property = gst_videomixer2_pad_set_property; gobject_class->get_property = gst_videomixer2_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, 10000, DEFAULT_PAD_ZORDER, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PAD_XPOS, g_param_spec_int ("xpos", "X Position", "X Position of the picture", G_MININT, G_MAXINT, DEFAULT_PAD_XPOS, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PAD_YPOS, g_param_spec_int ("ypos", "Y Position", "Y Position of the picture", G_MININT, G_MAXINT, DEFAULT_PAD_YPOS, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PAD_ALPHA, g_param_spec_double ("alpha", "Alpha", "Alpha of the picture", 0.0, 1.0, DEFAULT_PAD_ALPHA, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); } static void gst_videomixer2_pad_init (GstVideoMixer2Pad * mixerpad) { mixerpad->zorder = DEFAULT_PAD_ZORDER; mixerpad->xpos = DEFAULT_PAD_XPOS; mixerpad->ypos = DEFAULT_PAD_YPOS; mixerpad->alpha = DEFAULT_PAD_ALPHA; mixerpad->convert = NULL; mixerpad->need_conversion_update = FALSE; } /* GstVideoMixer2 */ #define DEFAULT_BACKGROUND VIDEO_MIXER2_BACKGROUND_CHECKER enum { PROP_0, PROP_BACKGROUND }; #define GST_TYPE_VIDEO_MIXER2_BACKGROUND (gst_videomixer2_background_get_type()) static GType gst_videomixer2_background_get_type (void) { static GType video_mixer_background_type = 0; static const GEnumValue video_mixer_background[] = { {VIDEO_MIXER2_BACKGROUND_CHECKER, "Checker pattern", "checker"}, {VIDEO_MIXER2_BACKGROUND_BLACK, "Black", "black"}, {VIDEO_MIXER2_BACKGROUND_WHITE, "White", "white"}, {VIDEO_MIXER2_BACKGROUND_TRANSPARENT, "Transparent Background to enable further mixing", "transparent"}, {0, NULL, NULL}, }; if (!video_mixer_background_type) { video_mixer_background_type = g_enum_register_static ("GstVideoMixer2Background", video_mixer_background); } return video_mixer_background_type; } #define gst_videomixer2_parent_class parent_class G_DEFINE_TYPE_WITH_CODE (GstVideoMixer2, gst_videomixer2, GST_TYPE_ELEMENT, G_IMPLEMENT_INTERFACE (GST_TYPE_CHILD_PROXY, gst_videomixer2_child_proxy_init)); static void gst_videomixer2_update_qos (GstVideoMixer2 * mix, gdouble proportion, GstClockTimeDiff diff, GstClockTime timestamp) { GST_DEBUG_OBJECT (mix, "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 (mix); mix->proportion = proportion; if (G_LIKELY (timestamp != GST_CLOCK_TIME_NONE)) { if (G_UNLIKELY (diff > 0)) mix->earliest_time = timestamp + 2 * diff + gst_util_uint64_scale_int_round (GST_SECOND, GST_VIDEO_INFO_FPS_D (&mix->info), GST_VIDEO_INFO_FPS_N (&mix->info)); else mix->earliest_time = timestamp + diff; } else { mix->earliest_time = GST_CLOCK_TIME_NONE; } GST_OBJECT_UNLOCK (mix); } static void gst_videomixer2_reset_qos (GstVideoMixer2 * mix) { gst_videomixer2_update_qos (mix, 0.5, 0, GST_CLOCK_TIME_NONE); mix->qos_processed = mix->qos_dropped = 0; } static void gst_videomixer2_read_qos (GstVideoMixer2 * mix, gdouble * proportion, GstClockTime * time) { GST_OBJECT_LOCK (mix); *proportion = mix->proportion; *time = mix->earliest_time; GST_OBJECT_UNLOCK (mix); } static void gst_videomixer2_reset (GstVideoMixer2 * mix) { GSList *l; gst_video_info_init (&mix->info); mix->ts_offset = 0; mix->nframes = 0; gst_segment_init (&mix->segment, GST_FORMAT_TIME); mix->segment.position = -1; gst_videomixer2_reset_qos (mix); for (l = mix->sinkpads; l; l = l->next) { GstVideoMixer2Pad *p = l->data; GstVideoMixer2Collect *mixcol = p->mixcol; gst_buffer_replace (&mixcol->buffer, NULL); mixcol->start_time = -1; mixcol->end_time = -1; gst_video_info_init (&p->info); } mix->newseg_pending = TRUE; } /* 1 == OK * 0 == need more data * -1 == EOS * -2 == error */ static gint gst_videomixer2_fill_queues (GstVideoMixer2 * mix, GstClockTime output_start_time, GstClockTime output_end_time) { GSList *l; gboolean eos = TRUE; gboolean need_more_data = FALSE; for (l = mix->sinkpads; l; l = l->next) { GstVideoMixer2Pad *pad = l->data; GstVideoMixer2Collect *mixcol = pad->mixcol; GstSegment *segment = &pad->mixcol->collect.segment; GstBuffer *buf; GstVideoInfo *vinfo; buf = gst_collect_pads_peek (mix->collect, &mixcol->collect); 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!"); return -2; } vinfo = &pad->info; /* FIXME: Make all this work with negative rates */ if ((mixcol->buffer && start_time < GST_BUFFER_TIMESTAMP (mixcol->buffer)) || (mixcol->queued && start_time < GST_BUFFER_TIMESTAMP (mixcol->queued))) { GST_WARNING_OBJECT (pad, "Buffer from the past, dropping"); gst_buffer_unref (buf); buf = gst_collect_pads_pop (mix->collect, &mixcol->collect); gst_buffer_unref (buf); need_more_data = TRUE; continue; } if (mixcol->queued) { end_time = start_time - GST_BUFFER_TIMESTAMP (mixcol->queued); start_time = GST_BUFFER_TIMESTAMP (mixcol->queued); gst_buffer_unref (buf); buf = gst_buffer_ref (mixcol->queued); vinfo = &mixcol->queued_vinfo; } else { end_time = GST_BUFFER_DURATION (buf); if (end_time == -1) { mixcol->queued = buf; buf = gst_collect_pads_pop (mix->collect, &mixcol->collect); gst_buffer_unref (buf); mixcol->queued_vinfo = pad->info; need_more_data = TRUE; 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"); if (buf == mixcol->queued) { gst_buffer_unref (buf); gst_buffer_replace (&mixcol->queued, NULL); } else { gst_buffer_unref (buf); buf = gst_collect_pads_pop (mix->collect, &mixcol->collect); 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 (mix->segment.rate) != 1.0) { start_time *= ABS (mix->segment.rate); end_time *= ABS (mix->segment.rate); } if (mixcol->end_time != -1 && mixcol->end_time > end_time) { GST_DEBUG_OBJECT (pad, "Buffer from the past, dropping"); if (buf == mixcol->queued) { gst_buffer_unref (buf); gst_buffer_replace (&mixcol->queued, NULL); } else { gst_buffer_unref (buf); buf = gst_collect_pads_pop (mix->collect, &mixcol->collect); 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 (&mixcol->buffer, buf); mixcol->buffer_vinfo = *vinfo; mixcol->start_time = start_time; mixcol->end_time = end_time; if (buf == mixcol->queued) { gst_buffer_unref (buf); gst_buffer_replace (&mixcol->queued, NULL); } else { gst_buffer_unref (buf); buf = gst_collect_pads_pop (mix->collect, &mixcol->collect); 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"); if (buf == mixcol->queued) { gst_buffer_unref (buf); gst_buffer_replace (&mixcol->queued, NULL); } else { gst_buffer_unref (buf); buf = gst_collect_pads_pop (mix->collect, &mixcol->collect); gst_buffer_unref (buf); } need_more_data = TRUE; continue; } } else { if (mixcol->end_time != -1) { if (mixcol->end_time <= output_start_time) { gst_buffer_replace (&mixcol->buffer, NULL); mixcol->start_time = mixcol->end_time = -1; if (!GST_COLLECT_PADS_STATE_IS_SET (mixcol, GST_COLLECT_PADS_STATE_EOS)) need_more_data = TRUE; } else if (!GST_COLLECT_PADS_STATE_IS_SET (mixcol, GST_COLLECT_PADS_STATE_EOS)) { eos = FALSE; } } } } if (need_more_data) return 0; if (eos) return -1; return 1; } static GstFlowReturn gst_videomixer2_blend_buffers (GstVideoMixer2 * mix, GstClockTime output_start_time, GstClockTime output_end_time, GstBuffer ** outbuf) { GSList *l; guint outsize; BlendFunction composite; GstVideoFrame outframe; static GstAllocationParams params = { 0, 15, 0, 0, }; outsize = GST_VIDEO_INFO_SIZE (&mix->info); *outbuf = gst_buffer_new_allocate (NULL, outsize, ¶ms); GST_BUFFER_TIMESTAMP (*outbuf) = output_start_time; GST_BUFFER_DURATION (*outbuf) = output_end_time - output_start_time; gst_video_frame_map (&outframe, &mix->info, *outbuf, GST_MAP_READWRITE); /* default to blending */ composite = mix->blend; switch (mix->background) { case VIDEO_MIXER2_BACKGROUND_CHECKER: mix->fill_checker (&outframe); break; case VIDEO_MIXER2_BACKGROUND_BLACK: mix->fill_color (&outframe, 16, 128, 128); break; case VIDEO_MIXER2_BACKGROUND_WHITE: mix->fill_color (&outframe, 240, 128, 128); break; case VIDEO_MIXER2_BACKGROUND_TRANSPARENT: { guint i, plane, num_planes, height; num_planes = GST_VIDEO_FRAME_N_PLANES (&outframe); for (plane = 0; plane < num_planes; ++plane) { guint8 *pdata; gsize rowsize, plane_stride; pdata = GST_VIDEO_FRAME_PLANE_DATA (&outframe, plane); plane_stride = GST_VIDEO_FRAME_PLANE_STRIDE (&outframe, plane); rowsize = GST_VIDEO_FRAME_COMP_WIDTH (&outframe, plane) * GST_VIDEO_FRAME_COMP_PSTRIDE (&outframe, plane); height = GST_VIDEO_FRAME_COMP_HEIGHT (&outframe, plane); for (i = 0; i < height; ++i) { memset (pdata, 0, rowsize); pdata += plane_stride; } } /* use overlay to keep background transparent */ composite = mix->overlay; break; } } for (l = mix->sinkpads; l; l = l->next) { GstVideoMixer2Pad *pad = l->data; GstVideoMixer2Collect *mixcol = pad->mixcol; if (mixcol->buffer != NULL) { GstClockTime timestamp; gint64 stream_time; GstSegment *seg; GstVideoFrame converted_frame; GstBuffer *converted_buf = NULL; GstVideoFrame frame; seg = &mixcol->collect.segment; timestamp = GST_BUFFER_TIMESTAMP (mixcol->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); gst_video_frame_map (&frame, &mixcol->buffer_vinfo, mixcol->buffer, GST_MAP_READ); if (pad->convert) { gint converted_size; /* We wait until here to set the conversion infos, in case mix->info changed */ if (pad->need_conversion_update) { pad->conversion_info = mix->info; gst_video_info_set_format (&(pad->conversion_info), GST_VIDEO_INFO_FORMAT (&mix->info), pad->info.width, pad->info.height); pad->need_conversion_update = FALSE; } converted_size = pad->conversion_info.size; converted_size = converted_size > outsize ? converted_size : outsize; converted_buf = gst_buffer_new_allocate (NULL, converted_size, ¶ms); gst_video_frame_map (&converted_frame, &(pad->conversion_info), converted_buf, GST_MAP_READWRITE); gst_video_converter_frame (pad->convert, &frame, &converted_frame); gst_video_frame_unmap (&frame); } else { converted_frame = frame; } composite (&converted_frame, pad->xpos, pad->ypos, pad->alpha, &outframe); if (pad->convert) gst_buffer_unref (converted_buf); gst_video_frame_unmap (&converted_frame); } } gst_video_frame_unmap (&outframe); return GST_FLOW_OK; } /* 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_videomixer2_do_qos (GstVideoMixer2 * mix, GstClockTime timestamp) { 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 (mix, "invalid timestamp, can't do QoS, process frame"); return -1; } /* get latest QoS observation values */ gst_videomixer2_read_qos (mix, &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 (mix, "no observation yet, process frame"); return -1; } /* qos is done on running time */ qostime = gst_segment_to_running_time (&mix->segment, GST_FORMAT_TIME, timestamp); /* see how our next timestamp relates to the latest qos timestamp */ GST_LOG_OBJECT (mix, "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 (mix, "we are late, drop frame"); return jitter; } GST_LOG_OBJECT (mix, "process frame"); return jitter; } static GstFlowReturn gst_videomixer2_collected (GstCollectPads * pads, GstVideoMixer2 * mix) { GstFlowReturn ret; GstClockTime output_start_time, output_end_time; GstBuffer *outbuf = NULL; gint res; gint64 jitter; /* If we're not negotiated yet... */ if (GST_VIDEO_INFO_FORMAT (&mix->info) == GST_VIDEO_FORMAT_UNKNOWN) return GST_FLOW_NOT_NEGOTIATED; if (mix->send_stream_start) { gchar s_id[32]; /* stream-start (FIXME: create id based on input ids) */ g_snprintf (s_id, sizeof (s_id), "mix-%08x", g_random_int ()); if (!gst_pad_push_event (mix->srcpad, gst_event_new_stream_start (s_id))) { GST_WARNING_OBJECT (mix->srcpad, "Sending stream start event failed"); } mix->send_stream_start = FALSE; } if (gst_pad_check_reconfigure (mix->srcpad)) gst_videomixer2_update_src_caps (mix); if (mix->send_caps) { if (!gst_pad_push_event (mix->srcpad, gst_event_new_caps (mix->current_caps))) { GST_WARNING_OBJECT (mix->srcpad, "Sending caps event failed"); } mix->send_caps = FALSE; } GST_VIDEO_MIXER2_LOCK (mix); if (mix->newseg_pending) { GST_DEBUG_OBJECT (mix, "Sending NEWSEGMENT event"); GST_VIDEO_MIXER2_UNLOCK (mix); if (!gst_pad_push_event (mix->srcpad, gst_event_new_segment (&mix->segment))) { ret = GST_FLOW_ERROR; goto done_unlocked; } GST_VIDEO_MIXER2_LOCK (mix); mix->newseg_pending = FALSE; } if (mix->segment.position == -1) output_start_time = mix->segment.start; else output_start_time = mix->segment.position; output_end_time = mix->ts_offset + gst_util_uint64_scale_round (mix->nframes + 1, GST_SECOND * GST_VIDEO_INFO_FPS_D (&mix->info), GST_VIDEO_INFO_FPS_N (&mix->info)) + mix->segment.start; if (output_end_time >= mix->segment.stop) { GST_DEBUG_OBJECT (mix, "Segment done"); if (!(mix->segment.flags & GST_SEGMENT_FLAG_SEGMENT)) { GST_VIDEO_MIXER2_UNLOCK (mix); gst_pad_push_event (mix->srcpad, gst_event_new_eos ()); ret = GST_FLOW_EOS; goto done_unlocked; } } if (G_UNLIKELY (mix->pending_tags)) { gst_pad_push_event (mix->srcpad, gst_event_new_tag (mix->pending_tags)); mix->pending_tags = NULL; } if (mix->segment.stop != -1) output_end_time = MIN (output_end_time, mix->segment.stop); res = gst_videomixer2_fill_queues (mix, output_start_time, output_end_time); if (res == 0) { GST_DEBUG_OBJECT (mix, "Need more data for decisions"); ret = GST_FLOW_OK; goto done; } else if (res == -1) { GST_VIDEO_MIXER2_UNLOCK (mix); GST_DEBUG_OBJECT (mix, "All sinkpads are EOS -- forwarding"); gst_pad_push_event (mix->srcpad, gst_event_new_eos ()); ret = GST_FLOW_EOS; goto done_unlocked; } else if (res == -2) { GST_ERROR_OBJECT (mix, "Error collecting buffers"); ret = GST_FLOW_ERROR; goto done; } jitter = gst_videomixer2_do_qos (mix, output_start_time); if (jitter <= 0) { ret = gst_videomixer2_blend_buffers (mix, output_start_time, output_end_time, &outbuf); mix->qos_processed++; } else { GstMessage *msg; mix->qos_dropped++; /* TODO: live */ msg = gst_message_new_qos (GST_OBJECT_CAST (mix), FALSE, gst_segment_to_running_time (&mix->segment, GST_FORMAT_TIME, output_start_time), gst_segment_to_stream_time (&mix->segment, GST_FORMAT_TIME, output_start_time), output_start_time, output_end_time - output_start_time); gst_message_set_qos_values (msg, jitter, mix->proportion, 1000000); gst_message_set_qos_stats (msg, GST_FORMAT_BUFFERS, mix->qos_processed, mix->qos_dropped); gst_element_post_message (GST_ELEMENT_CAST (mix), msg); ret = GST_FLOW_OK; } mix->segment.position = output_end_time; mix->nframes++; GST_VIDEO_MIXER2_UNLOCK (mix); if (outbuf) { GST_LOG_OBJECT (mix, "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_pad_push (mix->srcpad, outbuf); } goto done_unlocked; done: GST_VIDEO_MIXER2_UNLOCK (mix); 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 mixing 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 mixing so this really depends on where the * streams where punched in and what their relative offsets are against * eachother 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_videomixer2_query_duration (GstVideoMixer2 * mix, 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 (mix)); 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 (mix, "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_videomixer2_query_latency (GstVideoMixer2 * mix, GstQuery * query) { GstClockTime min, max; gboolean live; gboolean res; GstIterator *it; gboolean done; GValue item = { 0 }; res = TRUE; done = FALSE; live = FALSE; min = 0; max = GST_CLOCK_TIME_NONE; /* Take maximum of all latency values */ it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix)); while (!done) { switch (gst_iterator_next (it, &item)) { case GST_ITERATOR_DONE: done = TRUE; break; case GST_ITERATOR_OK: { GstPad *pad = g_value_get_object (&item); GstQuery *peerquery; GstClockTime min_cur, max_cur; gboolean live_cur; peerquery = gst_query_new_latency (); /* Ask peer for latency */ res &= gst_pad_peer_query (pad, peerquery); /* take max from all valid return values */ if (res) { gst_query_parse_latency (peerquery, &live_cur, &min_cur, &max_cur); if (min_cur > min) min = min_cur; if (max_cur != GST_CLOCK_TIME_NONE && ((max != GST_CLOCK_TIME_NONE && max_cur > max) || (max == GST_CLOCK_TIME_NONE))) max = max_cur; live = live || live_cur; } gst_query_unref (peerquery); g_value_reset (&item); break; } case GST_ITERATOR_RESYNC: live = FALSE; min = 0; max = GST_CLOCK_TIME_NONE; res = TRUE; gst_iterator_resync (it); break; default: res = FALSE; done = TRUE; break; } } g_value_unset (&item); gst_iterator_free (it); if (res) { /* store the results */ GST_DEBUG_OBJECT (mix, "Calculated total latency: live %s, min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT, (live ? "yes" : "no"), GST_TIME_ARGS (min), GST_TIME_ARGS (max)); gst_query_set_latency (query, live, min, max); } return res; } static gboolean gst_videomixer2_src_query (GstPad * pad, GstObject * parent, GstQuery * query) { GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (parent); 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 (&mix->segment, GST_FORMAT_TIME, mix->segment.position)); res = TRUE; break; default: break; } break; } case GST_QUERY_DURATION: res = gst_videomixer2_query_duration (mix, query); break; case GST_QUERY_LATENCY: res = gst_videomixer2_query_latency (mix, query); break; case GST_QUERY_CAPS: res = gst_pad_query_default (pad, parent, query); break; default: /* FIXME, needs a custom query handler because we have multiple * sinkpads */ res = FALSE; break; } return res; } static gboolean gst_videomixer2_src_event (GstPad * pad, GstObject * parent, GstEvent * event) { GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (parent); gboolean result; 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_videomixer2_update_qos (mix, proportion, diff, timestamp); result = gst_videomixer2_push_sink_event (mix, event); break; } case GST_EVENT_SEEK: { gdouble rate; GstFormat fmt; GstSeekFlags flags; GstSeekType start_type, stop_type; gint64 start, stop; GSList *l; gdouble abs_rate; /* parse the seek parameters */ gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type, &start, &stop_type, &stop); if (rate <= 0.0) { GST_ERROR_OBJECT (mix, "Negative rates not supported yet"); result = FALSE; gst_event_unref (event); break; } GST_DEBUG_OBJECT (mix, "Handling SEEK event"); abs_rate = ABS (rate); GST_VIDEO_MIXER2_LOCK (mix); for (l = mix->sinkpads; l; l = l->next) { GstVideoMixer2Pad *p = l->data; if (flags & GST_SEEK_FLAG_FLUSH) { gst_buffer_replace (&p->mixcol->buffer, NULL); p->mixcol->start_time = p->mixcol->end_time = -1; continue; } /* Convert to the output segment rate */ if (ABS (mix->segment.rate) != abs_rate) { if (ABS (mix->segment.rate) != 1.0 && p->mixcol->buffer) { p->mixcol->start_time /= ABS (mix->segment.rate); p->mixcol->end_time /= ABS (mix->segment.rate); } if (abs_rate != 1.0 && p->mixcol->buffer) { p->mixcol->start_time *= abs_rate; p->mixcol->end_time *= abs_rate; } } } GST_VIDEO_MIXER2_UNLOCK (mix); gst_segment_do_seek (&mix->segment, rate, fmt, flags, start_type, start, stop_type, stop, NULL); mix->segment.position = -1; mix->ts_offset = 0; mix->nframes = 0; mix->newseg_pending = TRUE; gst_videomixer2_reset_qos (mix); result = gst_collect_pads_src_event_default (mix->collect, pad, event); break; } case GST_EVENT_NAVIGATION: /* navigation is rather pointless. */ result = FALSE; gst_event_unref (event); break; default: /* just forward the rest for now */ result = gst_videomixer2_push_sink_event (mix, event); break; } return result; } static gboolean gst_videomixer2_src_setcaps (GstPad * pad, GstVideoMixer2 * mix, GstCaps * caps) { gboolean ret = FALSE; GstVideoInfo info; GST_INFO_OBJECT (pad, "set src caps: %" GST_PTR_FORMAT, caps); if (!gst_video_info_from_caps (&info, caps)) goto done; GST_VIDEO_MIXER2_LOCK (mix); mix->blend = NULL; mix->overlay = NULL; mix->fill_checker = NULL; mix->fill_color = NULL; if (GST_VIDEO_INFO_FPS_N (&mix->info) != GST_VIDEO_INFO_FPS_N (&info) || GST_VIDEO_INFO_FPS_D (&mix->info) != GST_VIDEO_INFO_FPS_D (&info)) { if (mix->segment.position != -1) { mix->ts_offset = mix->segment.position - mix->segment.start; mix->nframes = 0; } gst_videomixer2_reset_qos (mix); } mix->info = info; switch (GST_VIDEO_INFO_FORMAT (&mix->info)) { case GST_VIDEO_FORMAT_AYUV: mix->blend = gst_video_mixer_blend_ayuv; mix->overlay = gst_video_mixer_overlay_ayuv; mix->fill_checker = gst_video_mixer_fill_checker_ayuv; mix->fill_color = gst_video_mixer_fill_color_ayuv; ret = TRUE; break; case GST_VIDEO_FORMAT_ARGB: mix->blend = gst_video_mixer_blend_argb; mix->overlay = gst_video_mixer_overlay_argb; mix->fill_checker = gst_video_mixer_fill_checker_argb; mix->fill_color = gst_video_mixer_fill_color_argb; ret = TRUE; break; case GST_VIDEO_FORMAT_BGRA: mix->blend = gst_video_mixer_blend_bgra; mix->overlay = gst_video_mixer_overlay_bgra; mix->fill_checker = gst_video_mixer_fill_checker_bgra; mix->fill_color = gst_video_mixer_fill_color_bgra; ret = TRUE; break; case GST_VIDEO_FORMAT_ABGR: mix->blend = gst_video_mixer_blend_abgr; mix->overlay = gst_video_mixer_overlay_abgr; mix->fill_checker = gst_video_mixer_fill_checker_abgr; mix->fill_color = gst_video_mixer_fill_color_abgr; ret = TRUE; break; case GST_VIDEO_FORMAT_RGBA: mix->blend = gst_video_mixer_blend_rgba; mix->overlay = gst_video_mixer_overlay_rgba; mix->fill_checker = gst_video_mixer_fill_checker_rgba; mix->fill_color = gst_video_mixer_fill_color_rgba; ret = TRUE; break; case GST_VIDEO_FORMAT_Y444: mix->blend = gst_video_mixer_blend_y444; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_y444; mix->fill_color = gst_video_mixer_fill_color_y444; ret = TRUE; break; case GST_VIDEO_FORMAT_Y42B: mix->blend = gst_video_mixer_blend_y42b; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_y42b; mix->fill_color = gst_video_mixer_fill_color_y42b; ret = TRUE; break; case GST_VIDEO_FORMAT_YUY2: mix->blend = gst_video_mixer_blend_yuy2; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_yuy2; mix->fill_color = gst_video_mixer_fill_color_yuy2; ret = TRUE; break; case GST_VIDEO_FORMAT_UYVY: mix->blend = gst_video_mixer_blend_uyvy; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_uyvy; mix->fill_color = gst_video_mixer_fill_color_uyvy; ret = TRUE; break; case GST_VIDEO_FORMAT_YVYU: mix->blend = gst_video_mixer_blend_yvyu; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_yvyu; mix->fill_color = gst_video_mixer_fill_color_yvyu; ret = TRUE; break; case GST_VIDEO_FORMAT_I420: mix->blend = gst_video_mixer_blend_i420; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_i420; mix->fill_color = gst_video_mixer_fill_color_i420; ret = TRUE; break; case GST_VIDEO_FORMAT_YV12: mix->blend = gst_video_mixer_blend_yv12; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_yv12; mix->fill_color = gst_video_mixer_fill_color_yv12; ret = TRUE; break; case GST_VIDEO_FORMAT_NV12: mix->blend = gst_video_mixer_blend_nv12; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_nv12; mix->fill_color = gst_video_mixer_fill_color_nv12; ret = TRUE; break; case GST_VIDEO_FORMAT_NV21: mix->blend = gst_video_mixer_blend_nv21; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_nv21; mix->fill_color = gst_video_mixer_fill_color_nv21; ret = TRUE; break; case GST_VIDEO_FORMAT_Y41B: mix->blend = gst_video_mixer_blend_y41b; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_y41b; mix->fill_color = gst_video_mixer_fill_color_y41b; ret = TRUE; break; case GST_VIDEO_FORMAT_RGB: mix->blend = gst_video_mixer_blend_rgb; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_rgb; mix->fill_color = gst_video_mixer_fill_color_rgb; ret = TRUE; break; case GST_VIDEO_FORMAT_BGR: mix->blend = gst_video_mixer_blend_bgr; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_bgr; mix->fill_color = gst_video_mixer_fill_color_bgr; ret = TRUE; break; case GST_VIDEO_FORMAT_xRGB: mix->blend = gst_video_mixer_blend_xrgb; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_xrgb; mix->fill_color = gst_video_mixer_fill_color_xrgb; ret = TRUE; break; case GST_VIDEO_FORMAT_xBGR: mix->blend = gst_video_mixer_blend_xbgr; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_xbgr; mix->fill_color = gst_video_mixer_fill_color_xbgr; ret = TRUE; break; case GST_VIDEO_FORMAT_RGBx: mix->blend = gst_video_mixer_blend_rgbx; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_rgbx; mix->fill_color = gst_video_mixer_fill_color_rgbx; ret = TRUE; break; case GST_VIDEO_FORMAT_BGRx: mix->blend = gst_video_mixer_blend_bgrx; mix->overlay = mix->blend; mix->fill_checker = gst_video_mixer_fill_checker_bgrx; mix->fill_color = gst_video_mixer_fill_color_bgrx; ret = TRUE; break; default: break; } GST_VIDEO_MIXER2_UNLOCK (mix); if (mix->current_caps == NULL || gst_caps_is_equal (caps, mix->current_caps) == FALSE) { gst_caps_replace (&mix->current_caps, caps); mix->send_caps = TRUE; } done: return ret; } static GstFlowReturn gst_videomixer2_sink_clip (GstCollectPads * pads, GstCollectData * data, GstBuffer * buf, GstBuffer ** outbuf, GstVideoMixer2 * mix) { GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (data->pad); GstVideoMixer2Collect *mixcol = pad->mixcol; GstClockTime start_time, end_time; start_time = GST_BUFFER_TIMESTAMP (buf); if (start_time == -1) { GST_ERROR_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, mixcol->collect.segment.start); start_time = gst_segment_to_running_time (&mixcol->collect.segment, GST_FORMAT_TIME, start_time); end_time += GST_BUFFER_TIMESTAMP (buf); if (mixcol->collect.segment.stop != -1) end_time = MIN (end_time, mixcol->collect.segment.stop); end_time = gst_segment_to_running_time (&mixcol->collect.segment, GST_FORMAT_TIME, end_time); /* Convert to the output segment rate */ if (ABS (mix->segment.rate) != 1.0) { start_time *= ABS (mix->segment.rate); end_time *= ABS (mix->segment.rate); } if (mixcol->buffer != NULL && end_time < mixcol->end_time) { gst_buffer_unref (buf); *outbuf = NULL; return GST_FLOW_OK; } *outbuf = buf; return GST_FLOW_OK; } static void gst_videomixer2_flush (GstCollectPads * pads, GstVideoMixer2 * mix) { if (mix->pending_tags) { gst_tag_list_unref (mix->pending_tags); mix->pending_tags = NULL; } } static gboolean gst_videomixer2_sink_event (GstCollectPads * pads, GstCollectData * cdata, GstEvent * event, GstVideoMixer2 * mix) { GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (cdata->pad); gboolean ret = TRUE, discard = FALSE; GST_DEBUG_OBJECT (pad, "Got %s event: %" GST_PTR_FORMAT, GST_EVENT_TYPE_NAME (event), event); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_CAPS: { GstCaps *caps; gst_event_parse_caps (event, &caps); ret = gst_videomixer2_pad_sink_setcaps (GST_PAD (pad), GST_OBJECT (mix), 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_videomixer2_reset_qos (mix); break; } case GST_EVENT_FLUSH_STOP: mix->newseg_pending = TRUE; gst_videomixer2_reset_qos (mix); gst_buffer_replace (&pad->mixcol->buffer, NULL); pad->mixcol->start_time = -1; pad->mixcol->end_time = -1; mix->segment.position = -1; mix->ts_offset = 0; mix->nframes = 0; break; case GST_EVENT_TAG: { /* collect tags here so we can push them out when we collect data */ GstTagList *tags; gst_event_parse_tag (event, &tags); tags = gst_tag_list_merge (mix->pending_tags, tags, GST_TAG_MERGE_APPEND); if (mix->pending_tags) gst_tag_list_unref (mix->pending_tags); mix->pending_tags = tags; event = NULL; break; } default: break; } if (event != NULL) return gst_collect_pads_event_default (pads, cdata, event, discard); return ret; } static gboolean forward_event_func (GValue * item, GValue * ret, GstEvent * event) { GstPad *pad = g_value_get_object (item); gst_event_ref (event); GST_LOG_OBJECT (pad, "About to send event %s", GST_EVENT_TYPE_NAME (event)); if (!gst_pad_push_event (pad, event)) { g_value_set_boolean (ret, FALSE); GST_WARNING_OBJECT (pad, "Sending event %p (%s) failed.", event, GST_EVENT_TYPE_NAME (event)); } else { GST_LOG_OBJECT (pad, "Sent event %p (%s).", event, GST_EVENT_TYPE_NAME (event)); } return TRUE; } static gboolean gst_videomixer2_push_sink_event (GstVideoMixer2 * mix, GstEvent * event) { GstIterator *it; GValue vret = { 0 }; GST_LOG_OBJECT (mix, "Forwarding event %p (%s)", event, GST_EVENT_TYPE_NAME (event)); g_value_init (&vret, G_TYPE_BOOLEAN); g_value_set_boolean (&vret, TRUE); it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix)); gst_iterator_fold (it, (GstIteratorFoldFunction) forward_event_func, &vret, event); gst_iterator_free (it); gst_event_unref (event); return g_value_get_boolean (&vret); } /* GstElement vmethods */ static GstStateChangeReturn gst_videomixer2_change_state (GstElement * element, GstStateChange transition) { GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (element); GstStateChangeReturn ret; switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: mix->send_stream_start = TRUE; mix->send_caps = TRUE; gst_segment_init (&mix->segment, GST_FORMAT_TIME); gst_caps_replace (&mix->current_caps, NULL); GST_LOG_OBJECT (mix, "starting collectpads"); gst_collect_pads_start (mix->collect); break; case GST_STATE_CHANGE_PAUSED_TO_READY: GST_LOG_OBJECT (mix, "stopping collectpads"); gst_collect_pads_stop (mix->collect); break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: gst_videomixer2_reset (mix); break; default: break; } return ret; } static GstPad * gst_videomixer2_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps) { GstVideoMixer2 *mix; GstVideoMixer2Pad *mixpad; GstElementClass *klass = GST_ELEMENT_GET_CLASS (element); mix = GST_VIDEO_MIXER2 (element); if (templ == gst_element_class_get_pad_template (klass, "sink_%u")) { guint serial = 0; gchar *name = NULL; GstVideoMixer2Collect *mixcol = NULL; GST_VIDEO_MIXER2_LOCK (mix); if (req_name == NULL || strlen (req_name) < 6 || !g_str_has_prefix (req_name, "sink_")) { /* no name given when requesting the pad, use next available int */ serial = mix->next_sinkpad++; } else { /* parse serial number from requested padname */ serial = g_ascii_strtoull (&req_name[5], NULL, 10); if (serial >= mix->next_sinkpad) mix->next_sinkpad = serial + 1; } /* create new pad with the name */ name = g_strdup_printf ("sink_%u", serial); mixpad = g_object_new (GST_TYPE_VIDEO_MIXER2_PAD, "name", name, "direction", templ->direction, "template", templ, NULL); g_free (name); mixpad->zorder = mix->numpads; mixpad->xpos = DEFAULT_PAD_XPOS; mixpad->ypos = DEFAULT_PAD_YPOS; mixpad->alpha = DEFAULT_PAD_ALPHA; mixcol = (GstVideoMixer2Collect *) gst_collect_pads_add_pad (mix->collect, GST_PAD (mixpad), sizeof (GstVideoMixer2Collect), (GstCollectDataDestroyNotify) gst_videomixer2_collect_free, TRUE); /* Keep track of each other */ mixcol->mixpad = mixpad; mixpad->mixcol = mixcol; mixcol->start_time = -1; mixcol->end_time = -1; /* Keep an internal list of mixpads for zordering */ mix->sinkpads = g_slist_insert_sorted (mix->sinkpads, mixpad, (GCompareFunc) pad_zorder_compare); mix->numpads++; GST_VIDEO_MIXER2_UNLOCK (mix); } else { return NULL; } GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (mixpad)); /* add the pad to the element */ gst_element_add_pad (element, GST_PAD (mixpad)); gst_child_proxy_child_added (GST_CHILD_PROXY (mix), G_OBJECT (mixpad), GST_OBJECT_NAME (mixpad)); return GST_PAD (mixpad); } static void gst_videomixer2_release_pad (GstElement * element, GstPad * pad) { GstVideoMixer2 *mix = NULL; GstVideoMixer2Pad *mixpad; gboolean update_caps; mix = GST_VIDEO_MIXER2 (element); GST_VIDEO_MIXER2_LOCK (mix); if (G_UNLIKELY (g_slist_find (mix->sinkpads, pad) == NULL)) { g_warning ("Unknown pad %s", GST_PAD_NAME (pad)); goto error; } mixpad = GST_VIDEO_MIXER2_PAD (pad); if (mixpad->convert) gst_video_converter_free (mixpad->convert); mixpad->convert = NULL; mix->sinkpads = g_slist_remove (mix->sinkpads, pad); gst_child_proxy_child_removed (GST_CHILD_PROXY (mix), G_OBJECT (mixpad), GST_OBJECT_NAME (mixpad)); mix->numpads--; GST_COLLECT_PADS_STREAM_LOCK (mix->collect); gst_videomixer2_update_converters (mix); GST_COLLECT_PADS_STREAM_UNLOCK (mix->collect); update_caps = GST_VIDEO_INFO_FORMAT (&mix->info) != GST_VIDEO_FORMAT_UNKNOWN; GST_VIDEO_MIXER2_UNLOCK (mix); gst_collect_pads_remove_pad (mix->collect, pad); if (update_caps) gst_videomixer2_update_src_caps (mix); gst_element_remove_pad (element, pad); return; error: GST_VIDEO_MIXER2_UNLOCK (mix); } /* GObject vmethods */ static void gst_videomixer2_finalize (GObject * o) { GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (o); gst_object_unref (mix->collect); g_mutex_clear (&mix->lock); g_mutex_clear (&mix->setcaps_lock); G_OBJECT_CLASS (parent_class)->finalize (o); } static void gst_videomixer2_dispose (GObject * o) { GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (o); GSList *tmp; for (tmp = mix->sinkpads; tmp; tmp = tmp->next) { GstVideoMixer2Pad *mixpad = tmp->data; if (mixpad->convert) gst_video_converter_free (mixpad->convert); mixpad->convert = NULL; } if (mix->pending_tags) { gst_tag_list_unref (mix->pending_tags); mix->pending_tags = NULL; } gst_caps_replace (&mix->current_caps, NULL); G_OBJECT_CLASS (parent_class)->dispose (o); } static void gst_videomixer2_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (object); switch (prop_id) { case PROP_BACKGROUND: g_value_set_enum (value, mix->background); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_videomixer2_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (object); switch (prop_id) { case PROP_BACKGROUND: mix->background = g_value_get_enum (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /* GstChildProxy implementation */ static GObject * gst_videomixer2_child_proxy_get_child_by_index (GstChildProxy * child_proxy, guint index) { GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (child_proxy); GObject *obj; GST_VIDEO_MIXER2_LOCK (mix); if ((obj = g_slist_nth_data (mix->sinkpads, index))) g_object_ref (obj); GST_VIDEO_MIXER2_UNLOCK (mix); return obj; } static guint gst_videomixer2_child_proxy_get_children_count (GstChildProxy * child_proxy) { guint count = 0; GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (child_proxy); GST_VIDEO_MIXER2_LOCK (mix); count = mix->numpads; GST_VIDEO_MIXER2_UNLOCK (mix); GST_INFO_OBJECT (mix, "Children Count: %d", count); return count; } static void gst_videomixer2_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_videomixer2_child_proxy_get_child_by_index; iface->get_children_count = gst_videomixer2_child_proxy_get_children_count; } static void gst_videomixer2_constructed (GObject * obj) { GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (obj); gchar *cp_name; cp_name = g_strconcat (GST_OBJECT_NAME (obj), "-collectpads", NULL); gst_object_set_name (GST_OBJECT (mix->collect), cp_name); g_free (cp_name); G_OBJECT_CLASS (gst_videomixer2_parent_class)->constructed (obj); } /* GObject boilerplate */ static void gst_videomixer2_class_init (GstVideoMixer2Class * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GstElementClass *gstelement_class = (GstElementClass *) klass; gobject_class->constructed = gst_videomixer2_constructed; gobject_class->finalize = gst_videomixer2_finalize; gobject_class->dispose = gst_videomixer2_dispose; gobject_class->get_property = gst_videomixer2_get_property; gobject_class->set_property = gst_videomixer2_set_property; g_object_class_install_property (gobject_class, PROP_BACKGROUND, g_param_spec_enum ("background", "Background", "Background type", GST_TYPE_VIDEO_MIXER2_BACKGROUND, DEFAULT_BACKGROUND, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR (gst_videomixer2_request_new_pad); gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_videomixer2_release_pad); gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_videomixer2_change_state); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&src_factory)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&sink_factory)); gst_element_class_set_static_metadata (gstelement_class, "Video mixer 2", "Filter/Editor/Video/Compositor", "Mix multiple video streams", "Wim Taymans , " "Sebastian Dröge "); /* Register the pad class */ g_type_class_ref (GST_TYPE_VIDEO_MIXER2_PAD); } static void gst_videomixer2_init (GstVideoMixer2 * mix) { GstElementClass *klass = GST_ELEMENT_GET_CLASS (mix); mix->srcpad = gst_pad_new_from_template (gst_element_class_get_pad_template (klass, "src"), "src"); gst_pad_set_query_function (GST_PAD (mix->srcpad), GST_DEBUG_FUNCPTR (gst_videomixer2_src_query)); gst_pad_set_event_function (GST_PAD (mix->srcpad), GST_DEBUG_FUNCPTR (gst_videomixer2_src_event)); gst_element_add_pad (GST_ELEMENT (mix), mix->srcpad); mix->collect = gst_collect_pads_new (); gst_collect_pads_set_flush_function (mix->collect, (GstCollectPadsFlushFunction) gst_videomixer2_flush, mix); mix->background = DEFAULT_BACKGROUND; mix->current_caps = NULL; mix->pending_tags = NULL; gst_collect_pads_set_function (mix->collect, (GstCollectPadsFunction) GST_DEBUG_FUNCPTR (gst_videomixer2_collected), mix); gst_collect_pads_set_event_function (mix->collect, (GstCollectPadsEventFunction) gst_videomixer2_sink_event, mix); gst_collect_pads_set_query_function (mix->collect, (GstCollectPadsQueryFunction) gst_videomixer2_sink_query, mix); gst_collect_pads_set_clip_function (mix->collect, (GstCollectPadsClipFunction) gst_videomixer2_sink_clip, mix); g_mutex_init (&mix->lock); g_mutex_init (&mix->setcaps_lock); /* initialize variables */ gst_videomixer2_reset (mix); } /* Element registration */ static gboolean plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (gst_videomixer2_debug, "videomixer", 0, "video mixer"); gst_video_mixer_init_blend (); return gst_element_register (plugin, "videomixer", GST_RANK_PRIMARY, GST_TYPE_VIDEO_MIXER2); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, videomixer, "Video mixer", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)