/* GStreamer * Copyright (C) <1999> Erik Walthinsen * * 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. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include GST_DEBUG_CATEGORY (videorate_debug); #define GST_CAT_DEFAULT videorate_debug #define GST_TYPE_VIDEORATE \ (gst_videorate_get_type()) #define GST_VIDEORATE(obj) \ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEORATE,GstVideorate)) #define GST_VIDEORATE_CLASS(klass) \ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEORATE,GstVideorate)) #define GST_IS_VIDEORATE(obj) \ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEORATE)) #define GST_IS_VIDEORATE_CLASS(obj) \ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEORATE)) typedef struct _GstVideorate GstVideorate; typedef struct _GstVideorateClass GstVideorateClass; struct _GstVideorate { GstElement element; GstPad *sinkpad, *srcpad; /* video state */ gdouble from_fps, to_fps; guint64 next_ts; guint64 first_ts; GstBuffer *prevbuf; guint64 in, out, dup, drop; gboolean silent; gdouble new_pref; }; struct _GstVideorateClass { GstElementClass parent_class; }; /* elementfactory information */ static GstElementDetails videorate_details = GST_ELEMENT_DETAILS ("Video rate adjuster", "Filter/Effect/Video", "Drops/duplicates/adjusts timestamps on video frames to make a perfect stream", "Wim Taymans "); /* GstVideorate signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; #define DEFAULT_SILENT TRUE #define DEFAULT_NEW_PREF 1.0 enum { ARG_0, ARG_IN, ARG_OUT, ARG_DUP, ARG_DROP, ARG_SILENT, ARG_NEW_PREF, /* FILL ME */ }; static GstStaticPadTemplate gst_videorate_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-raw-yuv; video/x-raw-rgb") ); static GstStaticPadTemplate gst_videorate_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-raw-yuv; video/x-raw-rgb") ); static void gst_videorate_base_init (gpointer g_class); static void gst_videorate_class_init (GstVideorateClass * klass); static void gst_videorate_init (GstVideorate * videorate); static gboolean gst_videorate_event (GstPad * pad, GstEvent * event); static GstFlowReturn gst_videorate_chain (GstPad * pad, GstBuffer * buffer); static void gst_videorate_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_videorate_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstElementStateReturn gst_videorate_change_state (GstElement * element); static GstElementClass *parent_class = NULL; /*static guint gst_videorate_signals[LAST_SIGNAL] = { 0 }; */ static GType gst_videorate_get_type (void) { static GType videorate_type = 0; if (!videorate_type) { static const GTypeInfo videorate_info = { sizeof (GstVideorateClass), gst_videorate_base_init, NULL, (GClassInitFunc) gst_videorate_class_init, NULL, NULL, sizeof (GstVideorate), 0, (GInstanceInitFunc) gst_videorate_init, }; videorate_type = g_type_register_static (GST_TYPE_ELEMENT, "GstVideorate", &videorate_info, 0); } return videorate_type; } static void gst_videorate_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_details (element_class, &videorate_details); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_videorate_sink_template)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_videorate_src_template)); } static void gst_videorate_class_init (GstVideorateClass * klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); parent_class = g_type_class_peek_parent (klass); object_class->set_property = gst_videorate_set_property; object_class->get_property = gst_videorate_get_property; g_object_class_install_property (object_class, ARG_IN, g_param_spec_uint64 ("in", "In", "Number of input frames", 0, G_MAXUINT64, 0, G_PARAM_READABLE)); g_object_class_install_property (object_class, ARG_OUT, g_param_spec_uint64 ("out", "Out", "Number of output frames", 0, G_MAXUINT64, 0, G_PARAM_READABLE)); g_object_class_install_property (object_class, ARG_DUP, g_param_spec_uint64 ("duplicate", "Duplicate", "Number of duplicated frames", 0, G_MAXUINT64, 0, G_PARAM_READABLE)); g_object_class_install_property (object_class, ARG_DROP, g_param_spec_uint64 ("drop", "Drop", "Number of dropped frames", 0, G_MAXUINT64, 0, G_PARAM_READABLE)); g_object_class_install_property (object_class, ARG_SILENT, g_param_spec_boolean ("silent", "silent", "Don't emit notify for dropped and duplicated frames", DEFAULT_SILENT, G_PARAM_READWRITE)); g_object_class_install_property (object_class, ARG_NEW_PREF, g_param_spec_double ("new_pref", "New Pref", "Value indicating how much to prefer new frames", 0.0, 1.0, DEFAULT_NEW_PREF, G_PARAM_READWRITE)); element_class->change_state = gst_videorate_change_state; } /* return the caps that can be used on out_pad given in_caps on in_pad */ static gboolean gst_videorate_transformcaps (GstPad * in_pad, GstCaps * in_caps, GstPad * out_pad, GstCaps ** out_caps) { GstCaps *intersect; const GstCaps *in_templ; gint i; in_templ = gst_pad_get_pad_template_caps (in_pad); intersect = gst_caps_intersect (in_caps, in_templ); /* all possible framerates are allowed */ for (i = 0; i < gst_caps_get_size (intersect); i++) { GstStructure *structure; structure = gst_caps_get_structure (intersect, i); gst_structure_set (structure, "framerate", GST_TYPE_DOUBLE_RANGE, 0.0, G_MAXDOUBLE, NULL); } *out_caps = intersect; return TRUE; } static GstCaps * gst_videorate_getcaps (GstPad * pad) { GstVideorate *videorate; GstPad *otherpad; GstCaps *caps; videorate = GST_VIDEORATE (GST_PAD_PARENT (pad)); otherpad = (pad == videorate->srcpad) ? videorate->sinkpad : videorate->srcpad; /* we can do what the peer can */ caps = gst_pad_peer_get_caps (otherpad); if (caps) { GstCaps *transform; gst_videorate_transformcaps (otherpad, caps, pad, &transform); gst_caps_unref (caps); caps = transform; } else { /* no peer, our padtemplate is enough then */ caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad)); } return caps; } static gboolean gst_videorate_setcaps (GstPad * pad, GstCaps * caps) { GstVideorate *videorate; GstStructure *structure; gboolean ret = TRUE; double fps; GstPad *otherpad, *opeer; videorate = GST_VIDEORATE (GST_PAD_PARENT (pad)); structure = gst_caps_get_structure (caps, 0); if (!(ret = gst_structure_get_double (structure, "framerate", &fps))) goto done; if (pad == videorate->srcpad) { videorate->to_fps = fps; otherpad = videorate->sinkpad; } else { videorate->from_fps = fps; otherpad = videorate->srcpad; } /* now try to find something for the peer */ opeer = gst_pad_get_peer (otherpad); if (opeer) { if (gst_pad_accept_caps (opeer, caps)) { /* the peer accepts the caps as they are */ gst_pad_set_caps (otherpad, caps); ret = TRUE; } else { GstCaps *peercaps; GstCaps *intersect; GstCaps *transform = NULL; ret = FALSE; /* see how we can transform the input caps */ if (!gst_videorate_transformcaps (pad, caps, otherpad, &transform)) goto done; /* see what the peer can do */ peercaps = gst_pad_get_caps (opeer); /* filter against our possibilities */ intersect = gst_caps_intersect (peercaps, transform); gst_caps_unref (peercaps); gst_caps_unref (transform); /* take first possibility */ caps = gst_caps_copy_nth (intersect, 0); gst_caps_unref (intersect); structure = gst_caps_get_structure (caps, 0); /* and fixate */ if (gst_caps_structure_fixate_field_nearest_int (structure, "framerate", fps)) { gst_structure_get_double (structure, "framerate", &fps); if (otherpad == videorate->srcpad) { videorate->to_fps = fps; } else { videorate->from_fps = fps; } gst_pad_set_caps (otherpad, caps); ret = TRUE; } } gst_object_unref (GST_OBJECT (opeer)); } done: return ret; } static void gst_videorate_blank_data (GstVideorate * videorate) { GST_DEBUG ("resetting data"); if (videorate->prevbuf) gst_buffer_unref (videorate->prevbuf); videorate->prevbuf = NULL; videorate->from_fps = 0; videorate->to_fps = 0; videorate->in = 0; videorate->out = 0; videorate->drop = 0; videorate->dup = 0; videorate->next_ts = 0LL; videorate->first_ts = 0LL; } static void gst_videorate_init (GstVideorate * videorate) { GST_DEBUG ("gst_videorate_init"); videorate->sinkpad = gst_pad_new_from_template (gst_static_pad_template_get (&gst_videorate_sink_template), "sink"); gst_element_add_pad (GST_ELEMENT (videorate), videorate->sinkpad); gst_pad_set_event_function (videorate->sinkpad, gst_videorate_event); gst_pad_set_chain_function (videorate->sinkpad, gst_videorate_chain); gst_pad_set_getcaps_function (videorate->sinkpad, gst_videorate_getcaps); gst_pad_set_setcaps_function (videorate->sinkpad, gst_videorate_setcaps); videorate->srcpad = gst_pad_new_from_template (gst_static_pad_template_get (&gst_videorate_src_template), "src"); gst_element_add_pad (GST_ELEMENT (videorate), videorate->srcpad); gst_pad_set_getcaps_function (videorate->srcpad, gst_videorate_getcaps); gst_pad_set_setcaps_function (videorate->srcpad, gst_videorate_setcaps); gst_videorate_blank_data (videorate); videorate->silent = DEFAULT_SILENT; videorate->new_pref = DEFAULT_NEW_PREF; } static GstFlowReturn gst_videorate_event (GstPad * pad, GstEvent * event) { GstVideorate *videorate; videorate = GST_VIDEORATE (GST_PAD_PARENT (pad)); if (!videorate->prevbuf) goto done; switch (GST_EVENT_TYPE (event)) { case GST_EVENT_DISCONTINUOUS: { gint64 start, end; GST_STREAM_LOCK (pad); if (!(gst_event_discont_get_value (event, GST_FORMAT_TIME, &start, &end))) GST_WARNING ("Got discont but doesn't have GST_FORMAT_TIME value"); else { gst_videorate_blank_data (videorate); videorate->first_ts = start; } GST_STREAM_UNLOCK (pad); break; } default: break; } done: return gst_pad_event_default (pad, event); } static GstFlowReturn gst_videorate_chain (GstPad * pad, GstBuffer * buffer) { GstVideorate *videorate; GstFlowReturn res = GST_FLOW_OK; videorate = GST_VIDEORATE (GST_PAD_PARENT (pad)); if (videorate->from_fps == 0) return GST_FLOW_NOT_NEGOTIATED; if (videorate->to_fps == 0) return GST_FLOW_NOT_NEGOTIATED; GST_STREAM_LOCK (pad); /* pull in 2 buffers */ if (videorate->prevbuf == NULL) { /* We're sure it's a GstBuffer here */ videorate->prevbuf = buffer; videorate->next_ts = videorate->first_ts = GST_BUFFER_TIMESTAMP (buffer); } else { GstClockTime prevtime, intime; gint count = 0; gint64 diff1, diff2; prevtime = GST_BUFFER_TIMESTAMP (videorate->prevbuf); /* If it's a GstEvent, we give him the time of the next outputed frame */ #if 0 intime = (GST_IS_EVENT (data)) ? videorate->next_ts + (1 / videorate->to_fps * GST_SECOND) : GST_BUFFER_TIMESTAMP (buffer); #endif intime = GST_BUFFER_TIMESTAMP (buffer); GST_LOG_OBJECT (videorate, "prev buf %" GST_TIME_FORMAT " new buf %" GST_TIME_FORMAT " outgoing ts %" GST_TIME_FORMAT, GST_TIME_ARGS (prevtime), GST_TIME_ARGS (intime), GST_TIME_ARGS (videorate->next_ts)); videorate->in++; /* got 2 buffers, see which one is the best */ do { diff1 = prevtime - videorate->next_ts; diff2 = intime - videorate->next_ts; /* take absolute values, beware: abs and ABS don't work for gint64 */ if (diff1 < 0) diff1 = -diff1; if (diff2 < 0) diff2 = -diff2; GST_LOG_OBJECT (videorate, "diff with prev %" GST_TIME_FORMAT " diff with new %" GST_TIME_FORMAT " outgoing ts %" GST_TIME_FORMAT, GST_TIME_ARGS (diff1), GST_TIME_ARGS (diff2), GST_TIME_ARGS (videorate->next_ts)); /* output first one when its the best */ if (diff1 < diff2) { GstBuffer *outbuf; count++; outbuf = gst_buffer_create_sub (videorate->prevbuf, 0, GST_BUFFER_SIZE (videorate->prevbuf)); GST_BUFFER_TIMESTAMP (outbuf) = videorate->next_ts; videorate->out++; videorate->next_ts = videorate->first_ts + (videorate->out / videorate->to_fps * GST_SECOND); GST_BUFFER_DURATION (outbuf) = videorate->next_ts - GST_BUFFER_TIMESTAMP (outbuf); gst_buffer_set_caps (outbuf, GST_PAD_CAPS (videorate->srcpad)); if ((res = gst_pad_push (videorate->srcpad, outbuf)) != GST_FLOW_OK) goto done; GST_LOG_OBJECT (videorate, "old is best, dup, outgoing ts %" GST_TIME_FORMAT, GST_TIME_ARGS (videorate->next_ts)); } /* continue while the first one was the best */ } while (diff1 < diff2); /* if we outputed the first buffer more then once, we have dups */ if (count > 1) { videorate->dup += count - 1; if (!videorate->silent) g_object_notify (G_OBJECT (videorate), "duplicate"); } /* if we didn't output the first buffer, we have a drop */ else if (count == 0) { videorate->drop++; if (!videorate->silent) g_object_notify (G_OBJECT (videorate), "drop"); GST_LOG_OBJECT (videorate, "new is best, old never used, drop, outgoing ts %" GST_TIME_FORMAT, GST_TIME_ARGS (videorate->next_ts)); } GST_LOG_OBJECT (videorate, "left loop, putting new in old, diff1 %" GST_TIME_FORMAT ", diff2 %" GST_TIME_FORMAT ", next_ts %" GST_TIME_FORMAT ", in %lld, out %lld, drop %lld, dup %lld", GST_TIME_ARGS (diff1), GST_TIME_ARGS (diff2), GST_TIME_ARGS (videorate->next_ts), videorate->in, videorate->out, videorate->drop, videorate->dup); /* swap in new one when it's the best */ gst_buffer_unref (videorate->prevbuf); videorate->prevbuf = buffer; } done: GST_STREAM_UNLOCK (pad); return res; } static void gst_videorate_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstVideorate *videorate = GST_VIDEORATE (object); switch (prop_id) { case ARG_SILENT: videorate->silent = g_value_get_boolean (value); break; case ARG_NEW_PREF: videorate->new_pref = g_value_get_double (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_videorate_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstVideorate *videorate = GST_VIDEORATE (object); switch (prop_id) { case ARG_IN: g_value_set_uint64 (value, videorate->in); break; case ARG_OUT: g_value_set_uint64 (value, videorate->out); break; case ARG_DUP: g_value_set_uint64 (value, videorate->dup); break; case ARG_DROP: g_value_set_uint64 (value, videorate->drop); break; case ARG_SILENT: g_value_set_boolean (value, videorate->silent); break; case ARG_NEW_PREF: g_value_set_double (value, videorate->new_pref); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GstElementStateReturn gst_videorate_change_state (GstElement * element) { GstElementStateReturn ret; GstVideorate *videorate; gint transition; videorate = GST_VIDEORATE (element); transition = GST_STATE_TRANSITION (videorate); switch (transition) { default: break; } ret = parent_class->change_state (element); switch (transition) { case GST_STATE_PAUSED_TO_READY: gst_videorate_blank_data (videorate); break; default: break; } return ret; } static gboolean plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (videorate_debug, "videorate", 0, "Videorate stream fixer"); return gst_element_register (plugin, "videorate", GST_RANK_NONE, GST_TYPE_VIDEORATE); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "videorate", "Adjusts video frames", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)