diff options
Diffstat (limited to 'wearable/gst/videomixer/videomixer2.c')
| -rw-r--r-- | wearable/gst/videomixer/videomixer2.c | 2019 |
1 files changed, 0 insertions, 2019 deletions
diff --git a/wearable/gst/videomixer/videomixer2.c b/wearable/gst/videomixer/videomixer2.c deleted file mode 100644 index 585f3aa..0000000 --- a/wearable/gst/videomixer/videomixer2.c +++ /dev/null @@ -1,2019 +0,0 @@ -/* Generic video mixer plugin - * Copyright (C) 2004, 2008 Wim Taymans <wim@fluendo.com> - * Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -/** - * SECTION:element-videomixer2 - * - * 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. - * - * All sink pads must be either AYUV, ARGB or BGRA, but a mixture of them is not - * supported. The src pad will have the same colorspace as the sinks. - * No colorspace conversion is done. - * - * Individual parameters for each input stream can be configured on the - * #GstVideoMixer2Pad. - * - * At this stage, videomixer2 is considered UNSTABLE. The API provided in the - * properties may yet change in the near future. When videomixer2 is stable, - * it will replace #videomixer - * - * <refsect2> - * <title>Sample pipelines</title> - * |[ - * gst-launch-0.10 \ - * videotestsrc pattern=1 ! \ - * video/x-raw-yuv,format=\(fourcc\)AYUV,framerate=\(fraction\)10/1,width=100,height=100 ! \ - * videobox border-alpha=0 top=-70 bottom=-70 right=-220 ! \ - * videomixer2 name=mix sink_0::alpha=0.7 sink_1::alpha=0.5 ! \ - * ffmpegcolorspace ! xvimagesink \ - * videotestsrc ! \ - * video/x-raw-yuv,format=\(fourcc\)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 videotestsrc pattern=1 ! \ - * video/x-raw-rgb, framerate=\(fraction\)10/1, width=100, height=100 ! \ - * videomixer2 name=mix ! ffmpegcolorspace ! ximagesink \ - * videotestsrc ! \ - * video/x-raw-rgb, framerate=\(fraction\)5/1, width=320, height=240 ! mix. - * ]| A pipeline to demostrate bgra mixing. (This does not demonstrate alpha blending). - * |[ - * gst-launch videotestsrc pattern=1 ! \ - * video/x-raw-yuv,format =\(fourcc\)I420, framerate=\(fraction\)10/1, width=100, height=100 ! \ - * videomixer2 name=mix ! ffmpegcolorspace ! ximagesink \ - * videotestsrc ! \ - * video/x-raw-yuv,format=\(fourcc\)I420, framerate=\(fraction\)5/1, width=320, height=240 ! mix. - * ]| A pipeline to test I420 - * |[ - * gst-launch videomixer2 name=mixer sink_1::alpha=0.5 sink_1::xpos=50 sink_1::ypos=50 ! \ - * ffmpegcolorspace ! ximagesink \ - * videotestsrc pattern=snow timestamp-offset=3000000000 ! \ - * "video/x-raw-yuv,format=(fourcc)AYUV,width=640,height=480,framerate=(fraction)30/1" ! \ - * timeoverlay ! queue2 ! mixer. \ - * videotestsrc pattern=smpte ! \ - * "video/x-raw-yuv,format=(fourcc)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) - * </refsect2> - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -/* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex - * with newer GLib versions (>= 2.31.0) */ -#define GLIB_DISABLE_DEPRECATION_WARNINGS - -#include <string.h> - -#include "videomixer2.h" -#include "videomixer2pad.h" - -#include <gst/controller/gstcontroller.h> - -#include "gst/glib-compat-private.h" - -#ifdef DISABLE_ORC -#define orc_memset memset -#else -#include <orc/orcfunctions.h> -#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))) - -static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", - GST_PAD_SRC, - GST_PAD_ALWAYS, - GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV") ";" GST_VIDEO_CAPS_BGRA ";" - GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_ABGR ";" - GST_VIDEO_CAPS_YUV ("Y444") ";" GST_VIDEO_CAPS_YUV ("Y42B") ";" - GST_VIDEO_CAPS_YUV ("YUY2") ";" GST_VIDEO_CAPS_YUV ("UYVY") ";" - GST_VIDEO_CAPS_YUV ("YVYU") ";" - GST_VIDEO_CAPS_YUV ("I420") ";" GST_VIDEO_CAPS_YUV ("YV12") ";" - GST_VIDEO_CAPS_YUV ("Y41B") ";" GST_VIDEO_CAPS_RGB ";" - GST_VIDEO_CAPS_BGR ";" GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR ";" - GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx) - ); - -static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d", - GST_PAD_SINK, - GST_PAD_REQUEST, - GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV") ";" GST_VIDEO_CAPS_BGRA ";" - GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_ABGR ";" - GST_VIDEO_CAPS_YUV ("Y444") ";" GST_VIDEO_CAPS_YUV ("Y42B") ";" - GST_VIDEO_CAPS_YUV ("YUY2") ";" GST_VIDEO_CAPS_YUV ("UYVY") ";" - GST_VIDEO_CAPS_YUV ("YVYU") ";" - GST_VIDEO_CAPS_YUV ("I420") ";" GST_VIDEO_CAPS_YUV ("YV12") ";" - GST_VIDEO_CAPS_YUV ("Y41B") ";" GST_VIDEO_CAPS_RGB ";" - GST_VIDEO_CAPS_BGR ";" GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR ";" - GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx) - ); - -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); - -static void -_do_init (GType object_type) -{ - static const GInterfaceInfo child_proxy_info = { - (GInterfaceInitFunc) gst_videomixer2_child_proxy_init, - NULL, - NULL - }; - - g_type_add_interface_static (object_type, GST_TYPE_CHILD_PROXY, - &child_proxy_info); -} - -struct _GstVideoMixer2Collect -{ - GstCollectData2 collect; /* we extend the CollectData */ - - GstVideoMixer2Pad *mixpad; - - GstBuffer *queued; /* buffer for which we don't know the end time yet */ - - GstBuffer *buffer; /* buffer that should be blended now */ - 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 (GstCollectData2 * data) -{ - GstVideoMixer2Collect *cdata = (GstVideoMixer2Collect *) data; - - gst_buffer_replace (&cdata->buffer, NULL); -} - -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_LOCK (mix); - - for (l = mix->sinkpads; l; l = l->next) { - GstVideoMixer2Pad *mpad = l->data; - gint this_width, this_height; - - if (mpad->fps_n == 0 || mpad->fps_d == 0 || - mpad->width == 0 || mpad->height == 0) - continue; - - this_width = mpad->width + MAX (mpad->xpos, 0); - this_height = mpad->height + MAX (mpad->ypos, 0); - - if (best_width < this_width) - best_width = this_width; - if (best_height < this_height) - best_height = this_height; - - if (mpad->fps_d == 0) - cur_fps = 0.0; - else - gst_util_fraction_to_double (mpad->fps_n, mpad->fps_d, &cur_fps); - if (best_fps < cur_fps) { - best_fps = cur_fps; - best_fps_n = mpad->fps_n; - best_fps_d = mpad->fps_d; - } - } - - if (best_fps_n <= 0 && best_fps_d <= 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; - - if (mix->fps_n != best_fps_n || mix->fps_d != best_fps_d) { - if (mix->segment.last_stop != -1) { - mix->ts_offset = mix->segment.last_stop - mix->segment.start; - mix->nframes = 0; - } - } - - caps = gst_video_format_new_caps (mix->format, - best_width, best_height, best_fps_n, best_fps_d, - mix->par_n, mix->par_d); - - peercaps = gst_pad_peer_get_caps (mix->srcpad); - if (peercaps) { - 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)) { - ret = FALSE; - GST_VIDEO_MIXER2_UNLOCK (mix); - goto done; - } - - 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", &best_width); - gst_structure_get_int (s, "height", &best_height); - gst_structure_get_fraction (s, "fraction", &best_fps_n, &best_fps_d); - } - - mix->fps_n = best_fps_n; - mix->fps_d = best_fps_d; - mix->width = best_width; - mix->height = best_height; - - GST_VIDEO_MIXER2_UNLOCK (mix); - ret = gst_pad_set_caps (mix->srcpad, caps); - gst_caps_unref (caps); - } else { - GST_VIDEO_MIXER2_UNLOCK (mix); - } - -done: - return ret; -} - - -static gboolean -gst_videomixer2_pad_sink_setcaps (GstPad * pad, GstCaps * caps) -{ - GstVideoMixer2 *mix; - GstVideoMixer2Pad *mixpad; - GstVideoFormat fmt; - gint width, height; - gint fps_n = 0, fps_d = 0; - gint par_n = 1, par_d = 1; - gboolean ret = FALSE; - GstStructure *s; - - GST_INFO_OBJECT (pad, "Setting caps %" GST_PTR_FORMAT, caps); - - mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad)); - mixpad = GST_VIDEO_MIXER2_PAD (pad); - - if (!gst_video_format_parse_caps (caps, &fmt, &width, &height) || - !gst_video_parse_caps_pixel_aspect_ratio (caps, &par_n, &par_d)) { - GST_ERROR_OBJECT (pad, "Failed to parse caps"); - goto beach; - } - - s = gst_caps_get_structure (caps, 0); - if (gst_structure_has_field (s, "framerate") - && !gst_video_parse_caps_framerate (caps, &fps_n, &fps_d)) { - GST_ERROR_OBJECT (pad, "Failed to parse caps"); - goto beach; - } - - GST_VIDEO_MIXER2_LOCK (mix); - if (mix->format != GST_VIDEO_FORMAT_UNKNOWN) { - if (mix->format != fmt || mix->par_n != par_n || mix->par_d != par_d) { - GST_ERROR_OBJECT (pad, "Caps not compatible with other pads' caps"); - GST_VIDEO_MIXER2_UNLOCK (mix); - goto beach; - } - } - - mix->format = fmt; - mix->par_n = par_n; - mix->par_d = par_d; - mixpad->fps_n = fps_n; - mixpad->fps_d = fps_d; - mixpad->width = width; - mixpad->height = height; - - GST_VIDEO_MIXER2_UNLOCK (mix); - - ret = gst_videomixer2_update_src_caps (mix); - -beach: - gst_object_unref (mix); - - return ret; -} - -static GstCaps * -gst_videomixer2_pad_sink_getcaps (GstPad * pad) -{ - GstVideoMixer2 *mix; - GstCaps *srccaps; - GstStructure *s; - gint i, n; - - mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad)); - - srccaps = gst_pad_get_fixed_caps_func (GST_PAD (mix->srcpad)); - 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_DEBUG_OBJECT (pad, "Returning %" GST_PTR_FORMAT, srccaps); - - return srccaps; -} - -static gboolean -gst_videomixer2_pad_sink_acceptcaps (GstPad * pad, GstCaps * caps) -{ - gboolean ret; - GstVideoMixer2 *mix; - GstCaps *accepted_caps; - gint i, n; - GstStructure *s; - - mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad)); - GST_DEBUG_OBJECT (pad, "%" GST_PTR_FORMAT, caps); - - accepted_caps = gst_pad_get_fixed_caps_func (GST_PAD (mix->srcpad)); - 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); - } - - ret = gst_caps_can_intersect (caps, accepted_caps); - GST_INFO_OBJECT (pad, "%saccepted caps %" GST_PTR_FORMAT, (ret ? "" : "not "), - caps); - GST_INFO_OBJECT (pad, "acceptable caps are %" GST_PTR_FORMAT, accepted_caps); - - gst_caps_unref (accepted_caps); - - gst_object_unref (mix); - 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) -{ - /* setup some pad functions */ - gst_pad_set_setcaps_function (GST_PAD (mixerpad), - gst_videomixer2_pad_sink_setcaps); - gst_pad_set_acceptcaps_function (GST_PAD (mixerpad), - GST_DEBUG_FUNCPTR (gst_videomixer2_pad_sink_acceptcaps)); - gst_pad_set_getcaps_function (GST_PAD (mixerpad), - gst_videomixer2_pad_sink_getcaps); - - mixerpad->zorder = DEFAULT_PAD_ZORDER; - mixerpad->xpos = DEFAULT_PAD_XPOS; - mixerpad->ypos = DEFAULT_PAD_YPOS; - mixerpad->alpha = DEFAULT_PAD_ALPHA; -} - -/* 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; -} - - -GST_BOILERPLATE_FULL (GstVideoMixer2, gst_videomixer2, GstElement, - GST_TYPE_ELEMENT, _do_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 (GST_SECOND, - mix->fps_d, mix->fps_n); - 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; - - mix->format = GST_VIDEO_FORMAT_UNKNOWN; - mix->width = mix->height = 0; - mix->fps_n = mix->fps_d = 0; - mix->par_n = mix->par_d = 0; - mix->ts_offset = 0; - mix->nframes = 0; - - gst_segment_init (&mix->segment, GST_FORMAT_TIME); - mix->segment.last_stop = -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; - - p->fps_n = p->fps_d = 0; - p->width = p->height = 0; - } - - mix->newseg_pending = TRUE; - mix->flush_stop_pending = FALSE; -} - -/* 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; - - buf = gst_collect_pads2_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; - } - - /* 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_pads2_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); - } else { - end_time = GST_BUFFER_DURATION (buf); - - if (end_time == -1) { - mixcol->queued = buf; - need_more_data = TRUE; - continue; - } - } - - g_assert (start_time != -1 && end_time != -1); - end_time += start_time; /* convert from duration to position */ - - if (mixcol->end_time != -1 && mixcol->end_time > end_time) { - GST_WARNING_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_pads2_pop (mix->collect, &mixcol->collect); - gst_buffer_unref (buf); - } - - need_more_data = TRUE; - continue; - } - - /* 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_pads2_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 (mix->segment.abs_rate != 1.0) { - start_time *= mix->segment.abs_rate; - end_time *= mix->segment.abs_rate; - } - - 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->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_pads2_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_pads2_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_PADS2_STATE_IS_SET (mixcol, - GST_COLLECT_PADS2_STATE_EOS)) - need_more_data = TRUE; - } else { - 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; - GstFlowReturn ret; - guint outsize; - BlendFunction composite; - - outsize = gst_video_format_get_size (mix->format, mix->width, mix->height); - ret = gst_pad_alloc_buffer_and_set_caps (mix->srcpad, GST_BUFFER_OFFSET_NONE, - outsize, GST_PAD_CAPS (mix->srcpad), outbuf); - if (ret != GST_FLOW_OK) - return ret; - - GST_BUFFER_TIMESTAMP (*outbuf) = output_start_time; - GST_BUFFER_DURATION (*outbuf) = output_end_time - output_start_time; - - /* default to blending */ - composite = mix->blend; - switch (mix->background) { - case VIDEO_MIXER2_BACKGROUND_CHECKER: - mix->fill_checker (GST_BUFFER_DATA (*outbuf), mix->width, mix->height); - break; - case VIDEO_MIXER2_BACKGROUND_BLACK: - mix->fill_color (GST_BUFFER_DATA (*outbuf), mix->width, - mix->height, 16, 128, 128); - break; - case VIDEO_MIXER2_BACKGROUND_WHITE: - mix->fill_color (GST_BUFFER_DATA (*outbuf), mix->width, - mix->height, 240, 128, 128); - break; - case VIDEO_MIXER2_BACKGROUND_TRANSPARENT: - orc_memset (GST_BUFFER_DATA (*outbuf), 0, - gst_video_format_get_row_stride (mix->format, 0, - mix->width) * mix->height); - /* 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; - - 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 (G_OBJECT (pad), stream_time); - - composite (GST_BUFFER_DATA (mixcol->buffer), - pad->xpos, pad->ypos, pad->width, pad->height, pad->alpha, - GST_BUFFER_DATA (*outbuf), mix->width, mix->height); - } - } - - 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 (GstCollectPads2 * 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 (mix->format == GST_VIDEO_FORMAT_UNKNOWN) - return GST_FLOW_NOT_NEGOTIATED; - - if (g_atomic_int_compare_and_exchange (&mix->flush_stop_pending, TRUE, FALSE)) { - GST_DEBUG_OBJECT (mix, "pending flush stop"); - gst_pad_push_event (mix->srcpad, gst_event_new_flush_stop ()); - } - - GST_VIDEO_MIXER2_LOCK (mix); - - if (mix->newseg_pending) { - GST_DEBUG_OBJECT (mix, "Sending NEWSEGMENT event"); - if (!gst_pad_push_event (mix->srcpad, gst_event_new_new_segment_full (FALSE, - mix->segment.rate, mix->segment.applied_rate, - mix->segment.format, mix->segment.start, mix->segment.stop, - mix->segment.time))) { - ret = GST_FLOW_ERROR; - goto done; - } - mix->newseg_pending = FALSE; - } - - if (mix->segment.last_stop == -1) - output_start_time = mix->segment.start; - else - output_start_time = mix->segment.last_stop; - - if (output_start_time >= mix->segment.stop) { - GST_DEBUG_OBJECT (mix, "Segment done"); - gst_pad_push_event (mix->srcpad, gst_event_new_eos ()); - ret = GST_FLOW_UNEXPECTED; - goto done; - } - - output_end_time = - mix->ts_offset + gst_util_uint64_scale (mix->nframes + 1, - GST_SECOND * mix->fps_d, mix->fps_n); - 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_DEBUG_OBJECT (mix, "All sinkpads are EOS -- forwarding"); - gst_pad_push_event (mix->srcpad, gst_event_new_eos ()); - ret = GST_FLOW_UNEXPECTED; - goto done; - } 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; - } - - gst_segment_set_last_stop (&mix->segment, GST_FORMAT_TIME, 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); - } - GST_VIDEO_MIXER2_LOCK (mix); - -done: - GST_VIDEO_MIXER2_UNLOCK (mix); - - return ret; -} - -static GstCaps * -gst_videomixer2_src_getcaps (GstPad * pad) -{ - GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad)); - GstCaps *caps; - GstStructure *s; - gint n; - - if (mix->format != GST_VIDEO_FORMAT_UNKNOWN) { - caps = gst_caps_copy (GST_PAD_CAPS (mix->srcpad)); - } else { - caps = gst_caps_copy (gst_pad_get_pad_template_caps (mix->srcpad)); - } - - n = gst_caps_get_size (caps) - 1; - for (; n >= 0; n--) { - s = gst_caps_get_structure (caps, n); - gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT, - "height", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL); - if (mix->fps_d != 0) { - gst_structure_set (s, - "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL); - } - } - - gst_object_unref (mix); - - return caps; -} - -static gboolean -gst_videomixer2_query_duration (GstVideoMixer2 * mix, GstQuery * query) -{ - 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) { - GstIteratorResult ires; - gpointer item; - - ires = gst_iterator_next (it, &item); - switch (ires) { - case GST_ITERATOR_DONE: - done = TRUE; - break; - case GST_ITERATOR_OK: - { - GstPad *pad = GST_PAD_CAST (item); - gint64 duration; - - /* ask sink peer for duration */ - res &= gst_pad_query_peer_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; - } - gst_object_unref (pad); - break; - } - case GST_ITERATOR_RESYNC: - max = -1; - res = TRUE; - gst_iterator_resync (it); - break; - default: - res = FALSE; - done = TRUE; - break; - } - } - 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; - - 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) { - GstIteratorResult ires; - gpointer item; - - ires = gst_iterator_next (it, &item); - switch (ires) { - case GST_ITERATOR_DONE: - done = TRUE; - break; - case GST_ITERATOR_OK: - { - GstPad *pad = GST_PAD_CAST (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); - gst_object_unref (pad); - 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; - } - } - 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, GstQuery * query) -{ - GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad)); - 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.last_stop)); - 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; - default: - /* FIXME, needs a custom query handler because we have multiple - * sinkpads */ - res = FALSE; - gst_query_unref (query); - break; - } - - gst_object_unref (mix); - return res; -} - -static gboolean -gst_videomixer2_src_event (GstPad * pad, GstEvent * event) -{ - GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad)); - gboolean result; - - switch (GST_EVENT_TYPE (event)) { - case GST_EVENT_QOS:{ - GstClockTimeDiff diff; - GstClockTime timestamp; - gdouble proportion; - - gst_event_parse_qos (event, &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"); - - /* check if we are flushing */ - if (flags & GST_SEEK_FLAG_FLUSH) { - /* flushing seek, start flush downstream, the flush will be done - * when all pads received a FLUSH_STOP. */ - gst_pad_push_event (mix->srcpad, gst_event_new_flush_start ()); - - /* make sure we accept nothing anymore and return WRONG_STATE */ - gst_collect_pads2_set_flushing (mix->collect, TRUE); - } - - /* now wait for the collected to be finished and mark a new - * segment */ - GST_COLLECT_PADS2_STREAM_LOCK (mix->collect); - - 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 (mix->segment.abs_rate != abs_rate) { - if (mix->segment.abs_rate != 1.0 && p->mixcol->buffer) { - p->mixcol->start_time /= mix->segment.abs_rate; - p->mixcol->end_time /= mix->segment.abs_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_set_seek (&mix->segment, rate, fmt, flags, start_type, start, - stop_type, stop, NULL); - mix->segment.last_stop = -1; - mix->ts_offset = 0; - mix->nframes = 0; - mix->newseg_pending = TRUE; - - if (flags & GST_SEEK_FLAG_FLUSH) { - gst_collect_pads2_set_flushing (mix->collect, FALSE); - - /* we can't send FLUSH_STOP here since upstream could start pushing data - * after we unlock mix->collect. - * We set flush_stop_pending to TRUE instead and send FLUSH_STOP after - * forwarding the seek upstream or from gst_videomixer_collected, - * whichever happens first. - */ - mix->flush_stop_pending = TRUE; - } - - GST_COLLECT_PADS2_STREAM_UNLOCK (mix->collect); - - gst_videomixer2_reset_qos (mix); - - result = gst_videomixer2_push_sink_event (mix, event); - - if (g_atomic_int_compare_and_exchange (&mix->flush_stop_pending, TRUE, - FALSE)) { - GST_DEBUG_OBJECT (mix, "pending flush stop"); - gst_pad_push_event (mix->srcpad, gst_event_new_flush_stop ()); - } - - 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; - } - gst_object_unref (mix); - - return result; -} - -static gboolean -gst_videomixer2_src_setcaps (GstPad * pad, GstCaps * caps) -{ - GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent_element (pad)); - gboolean ret = FALSE; - GstVideoFormat fmt; - gint width, height; - gint fps_n, fps_d; - gint par_n, par_d; - - GST_INFO_OBJECT (pad, "set src caps: %" GST_PTR_FORMAT, caps); - - mix->blend = NULL; - mix->overlay = NULL; - mix->fill_checker = NULL; - mix->fill_color = NULL; - - if (!gst_video_format_parse_caps (caps, &fmt, &width, &height) || - !gst_video_parse_caps_framerate (caps, &fps_n, &fps_d) || - !gst_video_parse_caps_pixel_aspect_ratio (caps, &par_n, &par_d)) - goto done; - - GST_VIDEO_MIXER2_LOCK (mix); - - if (mix->fps_n != fps_n || mix->fps_d != fps_d) { - if (mix->segment.last_stop != -1) { - mix->ts_offset = mix->segment.last_stop - mix->segment.start; - mix->nframes = 0; - } - gst_videomixer2_reset_qos (mix); - } - - mix->format = fmt; - mix->width = width; - mix->height = height; - mix->fps_n = fps_n; - mix->fps_d = fps_d; - mix->par_n = par_n; - mix->par_d = par_d; - - switch (mix->format) { - 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_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); - -done: - gst_object_unref (mix); - - return ret; -} - -static GstFlowReturn -gst_videomixer2_sink_clip (GstCollectPads2 * pads, - GstCollectData2 * 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) - end_time = gst_util_uint64_scale_int (GST_SECOND, pad->fps_d, pad->fps_n); - 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 (mix->segment.abs_rate != 1.0) { - start_time *= mix->segment.abs_rate; - end_time *= mix->segment.abs_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 gboolean -gst_videomixer2_sink_event (GstCollectPads2 * pads, GstCollectData2 * cdata, - GstEvent * event, GstVideoMixer2 * mix) -{ - GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (cdata->pad); - gboolean ret = TRUE; - - GST_DEBUG_OBJECT (pad, "Got %s event on pad %s:%s", - GST_EVENT_TYPE_NAME (event), GST_DEBUG_PAD_NAME (pad)); - - /* return FALSE => event will be forwarded */ - switch (GST_EVENT_TYPE (event)) { - case GST_EVENT_NEWSEGMENT:{ - GstFormat fmt; - gst_event_parse_new_segment (event, NULL, NULL, &fmt, NULL, NULL, NULL); - - g_assert (fmt == GST_FORMAT_TIME); - /* eat NEWSEGMENT events, collectpads2 unrefs the event */ - ret = FALSE; - break; - } - case GST_EVENT_FLUSH_STOP: - mix->newseg_pending = TRUE; - mix->flush_stop_pending = FALSE; - gst_videomixer2_reset_qos (mix); - gst_buffer_replace (&pad->mixcol->buffer, NULL); - pad->mixcol->start_time = -1; - pad->mixcol->end_time = -1; - - gst_segment_init (&mix->segment, GST_FORMAT_TIME); - mix->segment.last_stop = -1; - mix->ts_offset = 0; - mix->nframes = 0; - - gst_pad_push_event (mix->srcpad, event); - break; - default: - gst_pad_push_event (mix->srcpad, event); - break; - } - - return ret; -} - -static gboolean -forward_event_func (GstPad * pad, GValue * ret, GstEvent * event) -{ - 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)); - } - gst_object_unref (pad); - 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: - GST_LOG_OBJECT (mix, "starting collectpads"); - gst_collect_pads2_start (mix->collect); - break; - case GST_STATE_CHANGE_PAUSED_TO_READY: - GST_LOG_OBJECT (mix, "stopping collectpads"); - gst_collect_pads2_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) -{ - 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_%d")) { - gint 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_%d", 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_pads2_add_pad_full (mix->collect, GST_PAD (mixpad), - sizeof (GstVideoMixer2Collect), - (GstCollectData2DestroyNotify) 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_append (mix->sinkpads, mixpad); - 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_OBJECT (mix), GST_OBJECT (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); - - mix->sinkpads = g_slist_remove (mix->sinkpads, pad); - gst_child_proxy_child_removed (GST_OBJECT (mix), GST_OBJECT (mixpad)); - mix->numpads--; - - update_caps = mix->format != GST_VIDEO_FORMAT_UNKNOWN; - GST_VIDEO_MIXER2_UNLOCK (mix); - - gst_collect_pads2_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_free (mix->lock); - - G_OBJECT_CLASS (parent_class)->finalize (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 GstObject * -gst_videomixer2_child_proxy_get_child_by_index (GstChildProxy * child_proxy, - guint index) -{ - GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (child_proxy); - GstObject *obj; - - GST_VIDEO_MIXER2_LOCK (mix); - if ((obj = g_slist_nth_data (mix->sinkpads, index))) - gst_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; -} - -/* GObject boilerplate */ -static void -gst_videomixer2_base_init (gpointer g_class) -{ - GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); - - gst_element_class_add_static_pad_template (element_class, &src_factory); - gst_element_class_add_static_pad_template (element_class, &sink_factory); - - gst_element_class_set_details_simple (element_class, "Video mixer 2", - "Filter/Editor/Video", - "Mix multiple video streams", "Wim Taymans <wim@fluendo.com>, " - "Sebastian Dröge <sebastian.droege@collabora.co.uk>"); -} - -static void -gst_videomixer2_class_init (GstVideoMixer2Class * klass) -{ - GObjectClass *gobject_class = (GObjectClass *) klass; - GstElementClass *gstelement_class = (GstElementClass *) klass; - - gobject_class->finalize = gst_videomixer2_finalize; - - 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); - - /* Register the pad class */ - g_type_class_ref (GST_TYPE_VIDEO_MIXER2_PAD); -} - -static void -gst_videomixer2_init (GstVideoMixer2 * mix, GstVideoMixer2Class * g_class) -{ - 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_getcaps_function (GST_PAD (mix->srcpad), - GST_DEBUG_FUNCPTR (gst_videomixer2_src_getcaps)); - gst_pad_set_setcaps_function (GST_PAD (mix->srcpad), - GST_DEBUG_FUNCPTR (gst_videomixer2_src_setcaps)); - 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_pads2_new (); - mix->background = DEFAULT_BACKGROUND; - - gst_collect_pads2_set_function (mix->collect, - (GstCollectPads2Function) GST_DEBUG_FUNCPTR (gst_videomixer2_collected), - mix); - gst_collect_pads2_set_event_function (mix->collect, - (GstCollectPads2EventFunction) gst_videomixer2_sink_event, mix); - gst_collect_pads2_set_clip_function (mix->collect, - (GstCollectPads2ClipFunction) gst_videomixer2_sink_clip, mix); - - mix->lock = g_mutex_new (); - /* initialize variables */ - gst_videomixer2_reset (mix); -} - -/* Element registration */ -gboolean -gst_videomixer2_register (GstPlugin * plugin) -{ - GST_DEBUG_CATEGORY_INIT (gst_videomixer2_debug, "videomixer2", 0, - "video mixer 2"); - - return gst_element_register (plugin, "videomixer2", GST_RANK_SECONDARY, - GST_TYPE_VIDEO_MIXER2); -} |