gstreamer/gst/videorate/gstvideorate.c
Thomas Vander Stichele f39b477379 borgify further clean up docs a little
Original commit message from CVS:
borgify further
clean up docs a little
2005-12-01 01:12:55 +00:00

658 lines
20 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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/gst.h>
GST_DEBUG_CATEGORY (video_rate_debug);
#define GST_CAT_DEFAULT video_rate_debug
#define GST_TYPE_VIDEO_RATE \
(gst_video_rate_get_type())
#define GST_VIDEO_RATE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_RATE,GstVideoRate))
#define GST_VIDEO_RATE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_RATE,GstVideoRate))
#define GST_IS_VIDEO_RATE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_RATE))
#define GST_IS_VIDEO_RATE_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_RATE))
typedef struct _GstVideoRate GstVideoRate;
typedef struct _GstVideoRateClass GstVideoRateClass;
struct _GstVideoRate
{
GstElement element;
GstPad *sinkpad, *srcpad;
/* video state */
gint from_rate_numerator, from_rate_denominator;
gint to_rate_numerator, to_rate_denominator;
guint64 next_ts; /* Timestamp of next buffer to output */
guint64 first_ts; /* Timestamp of first buffer */
GstBuffer *prevbuf;
guint64 prev_ts; /* Previous buffer timestamp */
guint64 in, out, dup, drop;
/* segment handling */
gint64 segment_start;
gint64 segment_stop;
gint64 segment_accum;
gboolean silent;
gdouble new_pref;
};
struct _GstVideoRateClass
{
GstElementClass parent_class;
};
/* elementfactory information */
static GstElementDetails video_rate_details =
GST_ELEMENT_DETAILS ("Video rate adjuster",
"Filter/Effect/Video",
"Drops/duplicates/adjusts timestamps on video frames to make a perfect stream",
"Wim Taymans <wim@fluendo.com>");
/* 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_video_rate_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_video_rate_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_video_rate_base_init (gpointer g_class);
static void gst_video_rate_class_init (GstVideoRateClass * klass);
static void gst_video_rate_init (GstVideoRate * videorate);
static gboolean gst_video_rate_event (GstPad * pad, GstEvent * event);
static GstFlowReturn gst_video_rate_chain (GstPad * pad, GstBuffer * buffer);
static void gst_video_rate_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_video_rate_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_video_rate_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class = NULL;
/*static guint gst_video_rate_signals[LAST_SIGNAL] = { 0 }; */
static GType
gst_video_rate_get_type (void)
{
static GType video_rate_type = 0;
if (!video_rate_type) {
static const GTypeInfo video_rate_info = {
sizeof (GstVideoRateClass),
gst_video_rate_base_init,
NULL,
(GClassInitFunc) gst_video_rate_class_init,
NULL,
NULL,
sizeof (GstVideoRate),
0,
(GInstanceInitFunc) gst_video_rate_init,
};
video_rate_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstVideoRate", &video_rate_info, 0);
}
return video_rate_type;
}
static void
gst_video_rate_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &video_rate_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_video_rate_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_video_rate_src_template));
}
static void
gst_video_rate_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_video_rate_set_property;
object_class->get_property = gst_video_rate_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_video_rate_change_state;
}
/* return the caps that can be used on out_pad given in_caps on in_pad */
static gboolean
gst_video_rate_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_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
}
*out_caps = intersect;
return TRUE;
}
static GstCaps *
gst_video_rate_getcaps (GstPad * pad)
{
GstVideoRate *videorate;
GstPad *otherpad;
GstCaps *caps;
videorate = GST_VIDEO_RATE (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_video_rate_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_video_rate_setcaps (GstPad * pad, GstCaps * caps)
{
GstVideoRate *videorate;
GstStructure *structure;
gboolean ret = TRUE;
GstPad *otherpad, *opeer;
gint rate_numerator, rate_denominator;
videorate = GST_VIDEO_RATE (GST_PAD_PARENT (pad));
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_fraction (structure, "framerate",
&rate_numerator, &rate_denominator))
goto done;
if (pad == videorate->srcpad) {
videorate->to_rate_numerator = rate_numerator;
videorate->to_rate_denominator = rate_denominator;
otherpad = videorate->sinkpad;
} else {
videorate->from_rate_numerator = rate_numerator;
videorate->from_rate_denominator = rate_denominator;
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_video_rate_transformcaps (pad, caps, otherpad, &transform))
goto done;
/* see what the peer can do */
peercaps = gst_pad_get_caps (opeer);
GST_DEBUG ("icaps %" GST_PTR_FORMAT, peercaps);
GST_DEBUG ("transform %" GST_PTR_FORMAT, transform);
/* filter against our possibilities */
intersect = gst_caps_intersect (peercaps, transform);
gst_caps_unref (peercaps);
gst_caps_unref (transform);
GST_DEBUG ("intersect %" GST_PTR_FORMAT, intersect);
/* take first possibility */
caps = gst_caps_copy_nth (intersect, 0);
gst_caps_unref (intersect);
structure = gst_caps_get_structure (caps, 0);
/* and fixate */
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
rate_numerator, rate_denominator);
gst_structure_get_fraction (structure, "framerate",
&rate_numerator, &rate_denominator);
if (otherpad == videorate->srcpad) {
videorate->to_rate_numerator = rate_numerator;
videorate->to_rate_denominator = rate_denominator;
} else {
videorate->from_rate_numerator = rate_numerator;
videorate->from_rate_denominator = rate_denominator;
}
gst_pad_set_caps (otherpad, caps);
ret = TRUE;
}
gst_object_unref (opeer);
}
done:
return ret;
}
static void
gst_video_rate_blank_data (GstVideoRate * videorate)
{
GST_DEBUG ("resetting data");
if (videorate->prevbuf)
gst_buffer_unref (videorate->prevbuf);
videorate->prevbuf = NULL;
videorate->from_rate_numerator = 0;
videorate->from_rate_denominator = 0;
videorate->to_rate_numerator = 0;
videorate->to_rate_denominator = 0;
videorate->in = 0;
videorate->out = 0;
videorate->drop = 0;
videorate->dup = 0;
videorate->next_ts = 0LL;
videorate->first_ts = 0LL;
videorate->prev_ts = 0LL;
videorate->segment_start = 0;
videorate->segment_stop = 0;
videorate->segment_accum = 0;
}
static void
gst_video_rate_init (GstVideoRate * videorate)
{
GST_DEBUG ("gst_video_rate_init");
videorate->sinkpad =
gst_pad_new_from_static_template (&gst_video_rate_sink_template, "sink");
gst_element_add_pad (GST_ELEMENT (videorate), videorate->sinkpad);
gst_pad_set_event_function (videorate->sinkpad, gst_video_rate_event);
gst_pad_set_chain_function (videorate->sinkpad, gst_video_rate_chain);
gst_pad_set_getcaps_function (videorate->sinkpad, gst_video_rate_getcaps);
gst_pad_set_setcaps_function (videorate->sinkpad, gst_video_rate_setcaps);
videorate->srcpad =
gst_pad_new_from_static_template (&gst_video_rate_src_template, "src");
gst_element_add_pad (GST_ELEMENT (videorate), videorate->srcpad);
gst_pad_set_getcaps_function (videorate->srcpad, gst_video_rate_getcaps);
gst_pad_set_setcaps_function (videorate->srcpad, gst_video_rate_setcaps);
gst_video_rate_blank_data (videorate);
videorate->silent = DEFAULT_SILENT;
videorate->new_pref = DEFAULT_NEW_PREF;
}
static GstFlowReturn
gst_video_rate_event (GstPad * pad, GstEvent * event)
{
GstVideoRate *videorate;
videorate = GST_VIDEO_RATE (GST_PAD_PARENT (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:
{
gint64 start, stop, base;
gdouble rate;
gboolean update;
GstFormat format;
gst_event_parse_new_segment (event, &update, &rate, &format, &start,
&stop, &base);
if (format != GST_FORMAT_TIME) {
GST_WARNING ("Got discont but doesn't have GST_FORMAT_TIME value");
} else {
/*
We just want to update the accumulated stream_time.
*/
videorate->segment_accum +=
videorate->segment_stop - videorate->segment_start;
videorate->segment_start = start;
videorate->segment_stop = stop;
GST_DEBUG_OBJECT (videorate, "Updated segment_accum:%" GST_TIME_FORMAT
" segment_start:%" GST_TIME_FORMAT " segment_stop:%"
GST_TIME_FORMAT, GST_TIME_ARGS (videorate->segment_accum),
GST_TIME_ARGS (videorate->segment_start),
GST_TIME_ARGS (videorate->segment_stop));
}
break;
}
case GST_EVENT_FLUSH_STOP:
{
gst_video_rate_blank_data (videorate);
}
default:
break;
}
return gst_pad_event_default (pad, event);
}
static GstFlowReturn
gst_video_rate_chain (GstPad * pad, GstBuffer * buffer)
{
GstVideoRate *videorate;
GstFlowReturn res = GST_FLOW_OK;
videorate = GST_VIDEO_RATE (GST_PAD_PARENT (pad));
if (videorate->from_rate_numerator == 0 ||
videorate->from_rate_denominator == 0 ||
videorate->to_rate_denominator == 0 || videorate->to_rate_numerator == 0)
return GST_FLOW_NOT_NEGOTIATED;
/* 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 = videorate->prev_ts =
GST_BUFFER_TIMESTAMP (buffer) - videorate->segment_start +
videorate->segment_accum;
} else {
GstClockTime prevtime, intime;
gint count = 0;
gint64 diff1, diff2;
prevtime = videorate->prev_ts;
intime =
GST_BUFFER_TIMESTAMP (buffer) - videorate->segment_start +
videorate->segment_accum;
GST_LOG_OBJECT (videorate,
"BEGINNING 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++;
if (videorate->to_rate_numerator) {
videorate->next_ts =
videorate->first_ts +
gst_util_uint64_scale_int (videorate->out * GST_SECOND,
videorate->to_rate_denominator, videorate->to_rate_numerator);
GST_BUFFER_DURATION (outbuf) =
videorate->next_ts - GST_BUFFER_TIMESTAMP (outbuf);
}
/* adapt for looping */
GST_BUFFER_TIMESTAMP (outbuf) -= videorate->segment_accum;
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (videorate->srcpad));
GST_LOG_OBJECT (videorate,
"old is best, dup, pushing buffer outgoing ts %" GST_TIME_FORMAT,
GST_TIME_ARGS (videorate->next_ts));
if ((res = gst_pad_push (videorate->srcpad, outbuf)) != GST_FLOW_OK) {
GST_WARNING_OBJECT (videorate, "couldn't push buffer on srcpad:%d",
res);
goto done;
}
GST_LOG_OBJECT (videorate,
"old is best, dup, pushed buffer 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,
"END, 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;
videorate->prev_ts =
GST_BUFFER_TIMESTAMP (buffer) - videorate->segment_start +
videorate->segment_accum;
}
done:
return res;
}
static void
gst_video_rate_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstVideoRate *videorate = GST_VIDEO_RATE (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_video_rate_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstVideoRate *videorate = GST_VIDEO_RATE (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 GstStateChangeReturn
gst_video_rate_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstVideoRate *videorate;
videorate = GST_VIDEO_RATE (element);
switch (transition) {
default:
break;
}
ret = parent_class->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_video_rate_blank_data (videorate);
break;
default:
break;
}
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (video_rate_debug, "videorate", 0,
"VideoRate stream fixer");
return gst_element_register (plugin, "videorate", GST_RANK_NONE,
GST_TYPE_VIDEO_RATE);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videorate",
"Adjusts video frames",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)