gstreamer/gst/videomixer/videomixer2.c

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/* 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>
#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"},
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
{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));
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
/* 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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
case VIDEO_MIXER2_BACKGROUND_TRANSPARENT:
orc_memset (GST_BUFFER_DATA (*outbuf), 0,
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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);
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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, &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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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;
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
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_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;
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;
}
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));
videomixer2: Add transparent background option for alpha channel formats This option allows the videomixer2 element to output a valid alpha channel when the inputs contain a valid alpha channel. This allows mixing to occur in multiple stages serially. The following pipeline shows an example of such a pipeline: gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2. The first videotestsrc in this pipeline creates a moving ball on a transparent background. It is then passed to the first videomixer2. Previously, this videomixer2 would have forced the alpha channel to 1.0 and given a background of checker, black, or white to the stream. With this patch, however, you can now specify the background as transparent, and the alpha channel of the input will be preserved. This allows for further mixing downstream, as is shown in the above pipeline where the a second videomixer2 is used to mix in a background of an smpte videotestsrc. So the result is a ball hovering over the smpte test source. This could, of course, have been accomplished with a single mixer element, but staged mixing is useful when it is not convenient to mix all video at once (e.g. a pipeline where a foreground and background bin exist and are mixed at the final output, but the foreground bin needs an internal mixer to create transitions between clips). Fixes bug #639994.
2011-01-19 19:07:17 +00:00
/* 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 */
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_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);
}