mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-10 11:29:55 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/gst/videomixer/videomixer2.c
Sebastian Dröge e79742205c videomixer2: Add documentation and add to the docs
2010-09-04 14:55:43 +02:00

1977 lines
59 KiB
C
Raw Blame History

/* 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
#include <string.h>
#include "videomixer2.h"
#include "videomixer2pad.h"
#include <gst/controller/gstcontroller.h>
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)) {
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;
GstVideoMixer2Pad *mixpad;
GstCaps *srccaps;
GstStructure *s;
gint i, n;
mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
mixpad = GST_VIDEO_MIXER2_PAD (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"},
{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));
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;
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;
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;
}
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);
mix->blend (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, &timestamp);
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->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->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->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->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->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->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->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->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->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->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->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->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->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->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->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->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->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->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->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->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_prepare_buffer (GstCollectPads2 * pads,
GstCollectData2 * data, GstBuffer * buf, GstVideoMixer2 * mix)
{
GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (data->pad);
GstVideoMixer2Collect *mixcol = pad->mixcol;
GstClockTime start_time, end_time;
gint64 last_stop;
start_time = GST_BUFFER_TIMESTAMP (buf);
if (start_time == -1) {
GST_ERROR_OBJECT (pad, "Timestamped buffers required!");
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)
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;
}
last_stop = mix->segment.last_stop;
if (mix->segment.last_stop == -1)
last_stop = mix->segment.start;
if (mixcol->buffer != NULL && end_time < mixcol->end_time) {
return GST_COLLECT_PADS2_FLOW_DROP;
}
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_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&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 */
(void) (GST_TYPE_VIDEO_MIXER2_PAD);
/* Register the background enum */
(void) (GST_TYPE_VIDEO_MIXER2_BACKGROUND);
}
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_prepare_buffer_function (mix->collect,
(GstCollectPads2BufferFunction) gst_videomixer2_sink_prepare_buffer, 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);
}
Reference in a new issue View git blame Copy permalink