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gstreamer/gst-libs/gst/video/gstvideoaggregator.c
Jan Schmidt 3d2048e40a videoaggregator: Handle if update_caps() returns EMPTY 
Don't assume the returned caps from update_caps() is
non-empty.
2016-08-26 03:25:49 +10:00

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/* Generic video aggregator 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gstvideoaggregator
* @short_description: Base class for video aggregators
*
* VideoAggregator 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.
*
* VideoAggregator will do colorspace conversion.
*
* Zorder for each input stream can be configured on the
* #GstVideoAggregatorPad.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstvideoaggregator.h"
#include "gstvideoaggregatorpad.h"
GST_DEBUG_CATEGORY_STATIC (gst_video_aggregator_debug);
#define GST_CAT_DEFAULT gst_video_aggregator_debug
/* Needed prototypes */
static void gst_video_aggregator_reset_qos (GstVideoAggregator * vagg);
/****************************************
* GstVideoAggregatorPad implementation *
****************************************/
#define DEFAULT_PAD_ZORDER 0
#define DEFAULT_PAD_IGNORE_EOS FALSE
enum
{
PROP_PAD_0,
PROP_PAD_ZORDER,
PROP_PAD_IGNORE_EOS,
};
struct _GstVideoAggregatorPadPrivate
{
/* Converter, if NULL no conversion is done */
GstVideoConverter *convert;
/* caps used for conversion if needed */
GstVideoInfo conversion_info;
GstBuffer *converted_buffer;
GstClockTime start_time;
GstClockTime end_time;
};
G_DEFINE_TYPE (GstVideoAggregatorPad, gst_video_aggregator_pad,
GST_TYPE_AGGREGATOR_PAD);
static void
gst_video_aggregator_pad_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (object);
switch (prop_id) {
case PROP_PAD_ZORDER:
g_value_set_uint (value, pad->zorder);
break;
case PROP_PAD_IGNORE_EOS:
g_value_set_boolean (value, pad->ignore_eos);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static int
pad_zorder_compare (const GstVideoAggregatorPad * pad1,
const GstVideoAggregatorPad * pad2)
{
return pad1->zorder - pad2->zorder;
}
static void
gst_video_aggregator_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (object);
GstVideoAggregator *vagg =
GST_VIDEO_AGGREGATOR (gst_pad_get_parent (GST_PAD (pad)));
switch (prop_id) {
case PROP_PAD_ZORDER:
GST_OBJECT_LOCK (vagg);
pad->zorder = g_value_get_uint (value);
GST_ELEMENT (vagg)->sinkpads = g_list_sort (GST_ELEMENT (vagg)->sinkpads,
(GCompareFunc) pad_zorder_compare);
GST_OBJECT_UNLOCK (vagg);
break;
case PROP_PAD_IGNORE_EOS:
pad->ignore_eos = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
gst_object_unref (vagg);
}
static GstFlowReturn
_flush_pad (GstAggregatorPad * aggpad, GstAggregator * aggregator)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (aggregator);
GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (aggpad);
gst_video_aggregator_reset_qos (vagg);
gst_buffer_replace (&pad->buffer, NULL);
pad->priv->start_time = -1;
pad->priv->end_time = -1;
return GST_FLOW_OK;
}
static gboolean
gst_video_aggregator_pad_set_info (GstVideoAggregatorPad * pad,
GstVideoAggregator * vagg G_GNUC_UNUSED,
GstVideoInfo * current_info, GstVideoInfo * wanted_info)
{
gchar *colorimetry, *best_colorimetry;
const gchar *chroma, *best_chroma;
if (!current_info->finfo)
return TRUE;
if (GST_VIDEO_INFO_FORMAT (current_info) == GST_VIDEO_FORMAT_UNKNOWN)
return TRUE;
if (pad->priv->convert)
gst_video_converter_free (pad->priv->convert);
pad->priv->convert = NULL;
colorimetry = gst_video_colorimetry_to_string (&(current_info->colorimetry));
chroma = gst_video_chroma_to_string (current_info->chroma_site);
best_colorimetry =
gst_video_colorimetry_to_string (&(wanted_info->colorimetry));
best_chroma = gst_video_chroma_to_string (wanted_info->chroma_site);
if (GST_VIDEO_INFO_FORMAT (wanted_info) !=
GST_VIDEO_INFO_FORMAT (current_info)
|| g_strcmp0 (colorimetry, best_colorimetry)
|| g_strcmp0 (chroma, best_chroma)) {
GstVideoInfo tmp_info;
/* Initialize with the wanted video format and our original width and
* height as we don't want to rescale. Then copy over the wanted
* colorimetry, and chroma-site and our current pixel-aspect-ratio
* and other relevant fields.
*/
gst_video_info_set_format (&tmp_info, GST_VIDEO_INFO_FORMAT (wanted_info),
current_info->width, current_info->height);
tmp_info.chroma_site = wanted_info->chroma_site;
tmp_info.colorimetry = wanted_info->colorimetry;
tmp_info.par_n = current_info->par_n;
tmp_info.par_d = current_info->par_d;
tmp_info.fps_n = current_info->fps_n;
tmp_info.fps_d = current_info->fps_d;
tmp_info.flags = current_info->flags;
tmp_info.interlace_mode = current_info->interlace_mode;
GST_DEBUG_OBJECT (pad, "This pad will be converted from %d to %d",
GST_VIDEO_INFO_FORMAT (current_info),
GST_VIDEO_INFO_FORMAT (&tmp_info));
pad->priv->convert =
gst_video_converter_new (current_info, &tmp_info, NULL);
pad->priv->conversion_info = tmp_info;
if (!pad->priv->convert) {
g_free (colorimetry);
g_free (best_colorimetry);
GST_WARNING_OBJECT (pad, "No path found for conversion");
return FALSE;
}
} else {
GST_DEBUG_OBJECT (pad, "This pad will not need conversion");
}
g_free (colorimetry);
g_free (best_colorimetry);
return TRUE;
}
static void
gst_video_aggregator_pad_finalize (GObject * o)
{
GstVideoAggregatorPad *vaggpad = GST_VIDEO_AGGREGATOR_PAD (o);
if (vaggpad->priv->convert)
gst_video_converter_free (vaggpad->priv->convert);
vaggpad->priv->convert = NULL;
G_OBJECT_CLASS (gst_video_aggregator_pad_parent_class)->finalize (o);
}
static gboolean
gst_video_aggregator_pad_prepare_frame (GstVideoAggregatorPad * pad,
GstVideoAggregator * vagg)
{
guint outsize;
GstVideoFrame *converted_frame;
GstBuffer *converted_buf = NULL;
GstVideoFrame *frame;
static GstAllocationParams params = { 0, 15, 0, 0, };
if (!pad->buffer)
return TRUE;
frame = g_slice_new0 (GstVideoFrame);
if (!gst_video_frame_map (frame, &pad->buffer_vinfo, pad->buffer,
GST_MAP_READ)) {
GST_WARNING_OBJECT (vagg, "Could not map input buffer");
return FALSE;
}
if (pad->priv->convert) {
gint converted_size;
converted_frame = g_slice_new0 (GstVideoFrame);
/* We wait until here to set the conversion infos, in case vagg->info changed */
converted_size = pad->priv->conversion_info.size;
outsize = GST_VIDEO_INFO_SIZE (&vagg->info);
converted_size = converted_size > outsize ? converted_size : outsize;
converted_buf = gst_buffer_new_allocate (NULL, converted_size, &params);
if (!gst_video_frame_map (converted_frame, &(pad->priv->conversion_info),
converted_buf, GST_MAP_READWRITE)) {
GST_WARNING_OBJECT (vagg, "Could not map converted frame");
g_slice_free (GstVideoFrame, converted_frame);
gst_video_frame_unmap (frame);
g_slice_free (GstVideoFrame, frame);
return FALSE;
}
gst_video_converter_frame (pad->priv->convert, frame, converted_frame);
pad->priv->converted_buffer = converted_buf;
gst_video_frame_unmap (frame);
g_slice_free (GstVideoFrame, frame);
} else {
converted_frame = frame;
}
pad->aggregated_frame = converted_frame;
return TRUE;
}
static void
gst_video_aggregator_pad_clean_frame (GstVideoAggregatorPad * pad,
GstVideoAggregator * vagg)
{
if (pad->aggregated_frame) {
gst_video_frame_unmap (pad->aggregated_frame);
g_slice_free (GstVideoFrame, pad->aggregated_frame);
pad->aggregated_frame = NULL;
}
if (pad->priv->converted_buffer) {
gst_buffer_unref (pad->priv->converted_buffer);
pad->priv->converted_buffer = NULL;
}
}
static void
gst_video_aggregator_pad_class_init (GstVideoAggregatorPadClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstAggregatorPadClass *aggpadclass = (GstAggregatorPadClass *) klass;
gobject_class->set_property = gst_video_aggregator_pad_set_property;
gobject_class->get_property = gst_video_aggregator_pad_get_property;
gobject_class->finalize = gst_video_aggregator_pad_finalize;
g_object_class_install_property (gobject_class, PROP_PAD_ZORDER,
g_param_spec_uint ("zorder", "Z-Order", "Z Order of the picture",
0, G_MAXUINT, DEFAULT_PAD_ZORDER,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PAD_IGNORE_EOS,
g_param_spec_boolean ("ignore-eos", "Ignore EOS", "Aggregate the last "
"frame on pads that are EOS till they are released",
DEFAULT_PAD_IGNORE_EOS,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_type_class_add_private (klass, sizeof (GstVideoAggregatorPadPrivate));
aggpadclass->flush = GST_DEBUG_FUNCPTR (_flush_pad);
klass->set_info = GST_DEBUG_FUNCPTR (gst_video_aggregator_pad_set_info);
klass->prepare_frame =
GST_DEBUG_FUNCPTR (gst_video_aggregator_pad_prepare_frame);
klass->clean_frame = GST_DEBUG_FUNCPTR (gst_video_aggregator_pad_clean_frame);
}
static void
gst_video_aggregator_pad_init (GstVideoAggregatorPad * vaggpad)
{
vaggpad->priv =
G_TYPE_INSTANCE_GET_PRIVATE (vaggpad, GST_TYPE_VIDEO_AGGREGATOR_PAD,
GstVideoAggregatorPadPrivate);
vaggpad->zorder = DEFAULT_PAD_ZORDER;
vaggpad->ignore_eos = DEFAULT_PAD_IGNORE_EOS;
vaggpad->aggregated_frame = NULL;
vaggpad->priv->converted_buffer = NULL;
vaggpad->priv->convert = NULL;
}
/*********************************
* GstChildProxy implementation *
*********************************/
static GObject *
gst_video_aggregator_child_proxy_get_child_by_index (GstChildProxy *
child_proxy, guint index)
{
GObject *obj;
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (child_proxy);
GST_OBJECT_LOCK (vagg);
if ((obj = g_list_nth_data (GST_ELEMENT (vagg)->sinkpads, index)))
g_object_ref (obj);
GST_OBJECT_UNLOCK (vagg);
return obj;
}
static guint
gst_video_aggregator_child_proxy_get_children_count (GstChildProxy *
child_proxy)
{
guint count = 0;
GST_OBJECT_LOCK (child_proxy);
count = GST_ELEMENT (child_proxy)->numsinkpads;
GST_OBJECT_UNLOCK (child_proxy);
GST_INFO_OBJECT (child_proxy, "Children Count: %d", count);
return count;
}
static void
gst_video_aggregator_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_video_aggregator_child_proxy_get_child_by_index;
iface->get_children_count =
gst_video_aggregator_child_proxy_get_children_count;
}
/**************************************
* GstVideoAggregator implementation *
**************************************/
#define GST_VIDEO_AGGREGATOR_GET_LOCK(vagg) (&GST_VIDEO_AGGREGATOR(vagg)->priv->lock)
#define GST_VIDEO_AGGREGATOR_LOCK(vagg) G_STMT_START { \
GST_LOG_OBJECT (vagg, "Taking EVENT lock from thread %p", \
g_thread_self()); \
g_mutex_lock(GST_VIDEO_AGGREGATOR_GET_LOCK(vagg)); \
GST_LOG_OBJECT (vagg, "Took EVENT lock from thread %p", \
g_thread_self()); \
} G_STMT_END
#define GST_VIDEO_AGGREGATOR_UNLOCK(vagg) G_STMT_START { \
GST_LOG_OBJECT (vagg, "Releasing EVENT lock from thread %p", \
g_thread_self()); \
g_mutex_unlock(GST_VIDEO_AGGREGATOR_GET_LOCK(vagg)); \
GST_LOG_OBJECT (vagg, "Took EVENT lock from thread %p", \
g_thread_self()); \
} G_STMT_END
struct _GstVideoAggregatorPrivate
{
/* Lock to prevent the state to change while aggregating */
GMutex lock;
/* Current downstream segment */
GstClockTime ts_offset;
guint64 nframes;
/* QoS stuff */
gdouble proportion;
GstClockTime earliest_time;
guint64 qos_processed, qos_dropped;
/* current caps */
GstCaps *current_caps;
gboolean live;
};
/* Can't use the G_DEFINE_TYPE macros because we need the
* videoaggregator class in the _init to be able to set
* the sink pad non-alpha caps. Using the G_DEFINE_TYPE there
* seems to be no way of getting the real class being initialized */
static void gst_video_aggregator_init (GstVideoAggregator * self,
GstVideoAggregatorClass * klass);
static void gst_video_aggregator_class_init (GstVideoAggregatorClass * klass);
static gpointer gst_video_aggregator_parent_class = NULL;
GType
gst_video_aggregator_get_type (void)
{
static volatile gsize g_define_type_id_volatile = 0;
if (g_once_init_enter (&g_define_type_id_volatile)) {
GType g_define_type_id = g_type_register_static_simple (GST_TYPE_AGGREGATOR,
g_intern_static_string ("GstVideoAggregator"),
sizeof (GstVideoAggregatorClass),
(GClassInitFunc) gst_video_aggregator_class_init,
sizeof (GstVideoAggregator),
(GInstanceInitFunc) gst_video_aggregator_init,
(GTypeFlags) G_TYPE_FLAG_ABSTRACT);
{
G_IMPLEMENT_INTERFACE (GST_TYPE_CHILD_PROXY,
gst_video_aggregator_child_proxy_init);
}
g_once_init_leave (&g_define_type_id_volatile, g_define_type_id);
}
return g_define_type_id_volatile;
}
static void
gst_video_aggregator_find_best_format (GstVideoAggregator * vagg,
GstCaps * downstream_caps, GstVideoInfo * best_info,
gboolean * at_least_one_alpha)
{
GList *tmp;
GstCaps *possible_caps;
GstVideoAggregatorPad *pad;
gboolean need_alpha = FALSE;
gint best_format_number = 0;
GHashTable *formats_table = g_hash_table_new (g_direct_hash, g_direct_equal);
GST_OBJECT_LOCK (vagg);
for (tmp = GST_ELEMENT (vagg)->sinkpads; tmp; tmp = tmp->next) {
GstStructure *s;
gint format_number;
pad = tmp->data;
if (!pad->info.finfo)
continue;
if (pad->info.finfo->flags & GST_VIDEO_FORMAT_FLAG_ALPHA)
*at_least_one_alpha = TRUE;
/* If we want alpha, disregard all the other formats */
if (need_alpha && !(pad->info.finfo->flags & GST_VIDEO_FORMAT_FLAG_ALPHA))
continue;
/* This can happen if we release a pad and another pad hasn't been negotiated_caps yet */
if (GST_VIDEO_INFO_FORMAT (&pad->info) == GST_VIDEO_FORMAT_UNKNOWN)
continue;
possible_caps = gst_video_info_to_caps (&pad->info);
s = gst_caps_get_structure (possible_caps, 0);
gst_structure_remove_fields (s, "width", "height", "framerate",
"pixel-aspect-ratio", "interlace-mode", NULL);
/* Can downstream accept this format ? */
if (!gst_caps_can_intersect (downstream_caps, possible_caps)) {
gst_caps_unref (possible_caps);
continue;
}
gst_caps_unref (possible_caps);
format_number =
GPOINTER_TO_INT (g_hash_table_lookup (formats_table,
GINT_TO_POINTER (GST_VIDEO_INFO_FORMAT (&pad->info))));
format_number += 1;
g_hash_table_replace (formats_table,
GINT_TO_POINTER (GST_VIDEO_INFO_FORMAT (&pad->info)),
GINT_TO_POINTER (format_number));
/* If that pad is the first with alpha, set it as the new best format */
if (!need_alpha && (pad->info.finfo->flags & GST_VIDEO_FORMAT_FLAG_ALPHA)) {
need_alpha = TRUE;
*best_info = pad->info;
best_format_number = format_number;
} else if (format_number > best_format_number) {
*best_info = pad->info;
best_format_number = format_number;
}
}
GST_OBJECT_UNLOCK (vagg);
g_hash_table_unref (formats_table);
}
/* WITH GST_VIDEO_AGGREGATOR_LOCK TAKEN */
static gboolean
gst_video_aggregator_src_setcaps (GstVideoAggregator * vagg, GstCaps * caps)
{
GstAggregator *agg = GST_AGGREGATOR (vagg);
gboolean ret = FALSE;
GstVideoInfo info;
GstPad *pad = GST_AGGREGATOR (vagg)->srcpad;
GST_INFO_OBJECT (pad, "set src caps: %" GST_PTR_FORMAT, caps);
if (!gst_video_info_from_caps (&info, caps))
goto done;
ret = TRUE;
if (GST_VIDEO_INFO_FPS_N (&vagg->info) != GST_VIDEO_INFO_FPS_N (&info) ||
GST_VIDEO_INFO_FPS_D (&vagg->info) != GST_VIDEO_INFO_FPS_D (&info)) {
if (agg->segment.position != -1) {
vagg->priv->nframes = 0;
/* The timestamp offset will be updated based on the
* segment position the next time we aggregate */
GST_DEBUG_OBJECT (vagg,
"Resetting frame counter because of framerate change");
}
gst_video_aggregator_reset_qos (vagg);
}
vagg->info = info;
if (vagg->priv->current_caps == NULL ||
gst_caps_is_equal (caps, vagg->priv->current_caps) == FALSE) {
GstClockTime latency;
gst_caps_replace (&vagg->priv->current_caps, caps);
GST_VIDEO_AGGREGATOR_UNLOCK (vagg);
gst_aggregator_set_src_caps (agg, caps);
latency = gst_util_uint64_scale (GST_SECOND,
GST_VIDEO_INFO_FPS_D (&info), GST_VIDEO_INFO_FPS_N (&info));
gst_aggregator_set_latency (agg, latency, latency);
GST_VIDEO_AGGREGATOR_LOCK (vagg);
}
done:
return ret;
}
static GstCaps *
gst_video_aggregator_default_fixate_caps (GstVideoAggregator * vagg,
GstCaps * caps)
{
gint best_width = -1, best_height = -1;
gint best_fps_n = -1, best_fps_d = -1;
gdouble best_fps = -1.;
GstStructure *s;
GList *l;
GST_OBJECT_LOCK (vagg);
for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
GstVideoAggregatorPad *mpad = l->data;
gint fps_n, fps_d;
gint width, height;
gdouble cur_fps;
fps_n = GST_VIDEO_INFO_FPS_N (&mpad->info);
fps_d = GST_VIDEO_INFO_FPS_D (&mpad->info);
width = GST_VIDEO_INFO_WIDTH (&mpad->info);
height = GST_VIDEO_INFO_HEIGHT (&mpad->info);
if (width == 0 || height == 0)
continue;
if (best_width < width)
best_width = width;
if (best_height < height)
best_height = height;
if (fps_d == 0)
cur_fps = 0.0;
else
gst_util_fraction_to_double (fps_n, fps_d, &cur_fps);
if (best_fps < cur_fps) {
best_fps = cur_fps;
best_fps_n = fps_n;
best_fps_d = fps_d;
}
}
GST_OBJECT_UNLOCK (vagg);
if (best_fps_n <= 0 || best_fps_d <= 0 || best_fps == 0.0) {
best_fps_n = 25;
best_fps_d = 1;
best_fps = 25.0;
}
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);
if (gst_structure_has_field (s, "pixel-aspect-ratio"))
gst_structure_fixate_field_nearest_fraction (s, "pixel-aspect-ratio", 1, 1);
caps = gst_caps_fixate (caps);
return caps;
}
static GstCaps *
gst_video_aggregator_default_update_caps (GstVideoAggregator * vagg,
GstCaps * caps, GstCaps * filter)
{
GstVideoAggregatorClass *vagg_klass = GST_VIDEO_AGGREGATOR_GET_CLASS (vagg);
GstCaps *ret, *best_format_caps;
gboolean at_least_one_alpha = FALSE;
GstVideoFormat best_format;
GstVideoInfo best_info;
best_format = GST_VIDEO_FORMAT_UNKNOWN;
gst_video_info_init (&best_info);
if (vagg_klass->find_best_format) {
vagg_klass->find_best_format (vagg, caps, &best_info, &at_least_one_alpha);
best_format = GST_VIDEO_INFO_FORMAT (&best_info);
}
if (best_format == GST_VIDEO_FORMAT_UNKNOWN) {
GstCaps *tmp = gst_caps_fixate (gst_caps_ref (caps));
gst_video_info_from_caps (&best_info, tmp);
best_format = GST_VIDEO_INFO_FORMAT (&best_info);
gst_caps_unref (tmp);
}
GST_DEBUG_OBJECT (vagg,
"The output format will now be : %d with chroma : %s",
best_format, gst_video_chroma_to_string (best_info.chroma_site));
best_format_caps = gst_caps_copy (caps);
gst_caps_set_simple (best_format_caps, "format", G_TYPE_STRING,
gst_video_format_to_string (best_format), "chroma-site", G_TYPE_STRING,
gst_video_chroma_to_string (best_info.chroma_site), NULL);
ret = gst_caps_merge (best_format_caps, gst_caps_ref (caps));
if (filter) {
GstCaps *tmp;
tmp = gst_caps_intersect (ret, filter);
gst_caps_unref (ret);
ret = tmp;
}
return ret;
}
/* WITH GST_VIDEO_AGGREGATOR_LOCK TAKEN */
static gboolean
gst_video_aggregator_update_src_caps (GstVideoAggregator * vagg)
{
GstVideoAggregatorClass *vagg_klass = GST_VIDEO_AGGREGATOR_GET_CLASS (vagg);
GstVideoAggregatorPadClass *vaggpad_klass = g_type_class_peek
(GST_AGGREGATOR_GET_CLASS (vagg)->sinkpads_type);
GstAggregator *agg = GST_AGGREGATOR (vagg);
gboolean ret = TRUE, at_least_one_pad_configured = FALSE;
gboolean at_least_one_alpha = FALSE;
GstCaps *downstream_caps;
GList *l;
downstream_caps = gst_pad_get_allowed_caps (agg->srcpad);
if (!downstream_caps || gst_caps_is_empty (downstream_caps)) {
GST_INFO_OBJECT (vagg, "No downstream caps found %"
GST_PTR_FORMAT, downstream_caps);
if (downstream_caps)
gst_caps_unref (downstream_caps);
return FALSE;
}
GST_OBJECT_LOCK (vagg);
for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
GstVideoAggregatorPad *mpad = l->data;
if (GST_VIDEO_INFO_WIDTH (&mpad->info) == 0
|| GST_VIDEO_INFO_HEIGHT (&mpad->info) == 0)
continue;
if (mpad->info.finfo->flags & GST_VIDEO_FORMAT_FLAG_ALPHA)
at_least_one_alpha = TRUE;
at_least_one_pad_configured = TRUE;
}
GST_OBJECT_UNLOCK (vagg);
if (at_least_one_pad_configured) {
GstCaps *caps, *peercaps;
peercaps = gst_pad_peer_query_caps (agg->srcpad, NULL);
g_assert (vagg_klass->update_caps);
GST_DEBUG_OBJECT (vagg, "updating caps from %" GST_PTR_FORMAT,
downstream_caps);
GST_DEBUG_OBJECT (vagg, " with filter %" GST_PTR_FORMAT, peercaps);
if (!(caps = vagg_klass->update_caps (vagg, downstream_caps, peercaps)) ||
gst_caps_is_empty (caps)) {
GST_WARNING_OBJECT (vagg, "Subclass failed to update provided caps");
gst_caps_unref (downstream_caps);
if (peercaps)
gst_caps_unref (peercaps);
ret = FALSE;
goto done;
}
GST_DEBUG_OBJECT (vagg, " to %" GST_PTR_FORMAT, caps);
gst_caps_unref (downstream_caps);
if (peercaps)
gst_caps_unref (peercaps);
if (!gst_caps_is_fixed (caps)) {
g_assert (vagg_klass->fixate_caps);
caps = gst_caps_make_writable (caps);
GST_DEBUG_OBJECT (vagg, "fixate caps from %" GST_PTR_FORMAT, caps);
if (!(caps = vagg_klass->fixate_caps (vagg, caps))) {
GST_WARNING_OBJECT (vagg, "Subclass failed to fixate provided caps");
ret = FALSE;
goto done;
}
GST_DEBUG_OBJECT (vagg, " to %" GST_PTR_FORMAT, caps);
}
{
const GstVideoFormatInfo *finfo;
const gchar *v_format_str;
GstVideoFormat v_format;
GstStructure *s;
s = gst_caps_get_structure (caps, 0);
v_format_str = gst_structure_get_string (s, "format");
g_return_val_if_fail (v_format_str != NULL, FALSE);
v_format = gst_video_format_from_string (v_format_str);
g_return_val_if_fail (v_format != GST_VIDEO_FORMAT_UNKNOWN, FALSE);
finfo = gst_video_format_get_info (v_format);
g_return_val_if_fail (finfo != NULL, FALSE);
if (at_least_one_alpha && !(finfo->flags & GST_VIDEO_FORMAT_FLAG_ALPHA)) {
GST_ELEMENT_ERROR (vagg, CORE, NEGOTIATION,
("At least one of the input pads contains alpha, but configured caps don't support alpha."),
("Either convert your inputs to not contain alpha or add a videoconvert after the aggregator"));
ret = FALSE;
goto done;
}
}
gst_video_info_from_caps (&vagg->info, caps);
if (vaggpad_klass->set_info) {
/* Then browse the sinks once more, setting or unsetting conversion if needed */
for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (l->data);
if (!vaggpad_klass->set_info (pad, vagg, &pad->info, &vagg->info)) {
GST_OBJECT_UNLOCK (vagg);
return FALSE;
}
}
}
if (gst_video_aggregator_src_setcaps (vagg, caps)) {
if (vagg_klass->negotiated_caps)
ret =
GST_VIDEO_AGGREGATOR_GET_CLASS (vagg)->negotiated_caps (vagg, caps);
}
gst_caps_unref (caps);
} else {
/* We couldn't decide the output video info because the sinkpads don't have
* all the caps yet, so we mark the pad as needing a reconfigure. This
* allows aggregate() to skip ahead a bit and try again later. */
GST_DEBUG_OBJECT (vagg, "Couldn't decide output video info");
gst_pad_mark_reconfigure (agg->srcpad);
ret = FALSE;
}
done:
return ret;
}
static gboolean
gst_video_aggregator_get_sinkpads_interlace_mode (GstVideoAggregator * vagg,
GstVideoAggregatorPad * skip_pad, GstVideoInterlaceMode * mode)
{
GList *walk;
for (walk = GST_ELEMENT (vagg)->sinkpads; walk; walk = g_list_next (walk)) {
GstVideoAggregatorPad *vaggpad = walk->data;
if (skip_pad && vaggpad == skip_pad)
continue;
if (vaggpad->info.finfo
&& GST_VIDEO_INFO_FORMAT (&vaggpad->info) != GST_VIDEO_FORMAT_UNKNOWN) {
*mode = GST_VIDEO_INFO_INTERLACE_MODE (&vaggpad->info);
return TRUE;
}
}
return FALSE;
}
static gboolean
gst_video_aggregator_pad_sink_setcaps (GstPad * pad, GstObject * parent,
GstCaps * caps)
{
GstVideoAggregator *vagg;
GstVideoAggregatorPad *vaggpad;
GstVideoInfo info;
gboolean ret = FALSE;
GST_INFO_OBJECT (pad, "Setting caps %" GST_PTR_FORMAT, caps);
vagg = GST_VIDEO_AGGREGATOR (parent);
vaggpad = GST_VIDEO_AGGREGATOR_PAD (pad);
if (!gst_video_info_from_caps (&info, caps)) {
GST_DEBUG_OBJECT (pad, "Failed to parse caps");
goto beach;
}
GST_VIDEO_AGGREGATOR_LOCK (vagg);
{
GstVideoInterlaceMode pads_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
gboolean has_mode = FALSE;
/* get the current output setting or fallback to other pads settings */
if (GST_VIDEO_INFO_FORMAT (&vagg->info) != GST_VIDEO_FORMAT_UNKNOWN) {
pads_mode = GST_VIDEO_INFO_INTERLACE_MODE (&vagg->info);
has_mode = TRUE;
} else {
has_mode =
gst_video_aggregator_get_sinkpads_interlace_mode (vagg, vaggpad,
&pads_mode);
}
if (has_mode) {
if (pads_mode != GST_VIDEO_INFO_INTERLACE_MODE (&info)) {
GST_ERROR_OBJECT (pad,
"got input caps %" GST_PTR_FORMAT ", but current caps are %"
GST_PTR_FORMAT, caps, vagg->priv->current_caps);
GST_VIDEO_AGGREGATOR_UNLOCK (vagg);
return FALSE;
}
}
}
vaggpad->info = info;
gst_pad_mark_reconfigure (GST_AGGREGATOR_SRC_PAD (vagg));
ret = TRUE;
GST_VIDEO_AGGREGATOR_UNLOCK (vagg);
beach:
return ret;
}
static gboolean
gst_video_aggregator_caps_has_alpha (GstCaps * caps)
{
guint size = gst_caps_get_size (caps);
guint i;
for (i = 0; i < size; i++) {
GstStructure *s = gst_caps_get_structure (caps, i);
const GValue *formats = gst_structure_get_value (s, "format");
if (formats) {
const GstVideoFormatInfo *info;
if (GST_VALUE_HOLDS_LIST (formats)) {
guint list_size = gst_value_list_get_size (formats);
guint index;
for (index = 0; index < list_size; index++) {
const GValue *list_item = gst_value_list_get_value (formats, index);
info =
gst_video_format_get_info (gst_video_format_from_string
(g_value_get_string (list_item)));
if (GST_VIDEO_FORMAT_INFO_HAS_ALPHA (info))
return TRUE;
}
} else if (G_VALUE_HOLDS_STRING (formats)) {
info =
gst_video_format_get_info (gst_video_format_from_string
(g_value_get_string (formats)));
if (GST_VIDEO_FORMAT_INFO_HAS_ALPHA (info))
return TRUE;
} else {
g_assert_not_reached ();
GST_WARNING ("Unexpected type for video 'format' field: %s",
G_VALUE_TYPE_NAME (formats));
}
} else {
return TRUE;
}
}
return FALSE;
}
static GstCaps *
gst_video_aggregator_pad_sink_getcaps (GstPad * pad, GstVideoAggregator * vagg,
GstCaps * filter)
{
GstCaps *srccaps;
GstCaps *template_caps, *sink_template_caps;
GstCaps *returned_caps;
GstStructure *s;
gint i, n;
GstAggregator *agg = GST_AGGREGATOR (vagg);
GstPad *srcpad = GST_PAD (agg->srcpad);
gboolean has_alpha;
GstVideoInterlaceMode interlace_mode;
gboolean has_interlace_mode;
template_caps = gst_pad_get_pad_template_caps (srcpad);
GST_DEBUG_OBJECT (pad, "Get caps with filter: %" GST_PTR_FORMAT, filter);
srccaps = gst_pad_peer_query_caps (srcpad, template_caps);
srccaps = gst_caps_make_writable (srccaps);
has_alpha = gst_video_aggregator_caps_has_alpha (srccaps);
has_interlace_mode =
gst_video_aggregator_get_sinkpads_interlace_mode (vagg, NULL,
&interlace_mode);
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);
gst_structure_remove_fields (s, "colorimetry", "chroma-site", "format",
"pixel-aspect-ratio", NULL);
if (has_interlace_mode)
gst_structure_set (s, "interlace-mode", G_TYPE_STRING,
gst_video_interlace_mode_to_string (interlace_mode), NULL);
}
if (filter) {
returned_caps = gst_caps_intersect (srccaps, filter);
gst_caps_unref (srccaps);
} else {
returned_caps = srccaps;
}
if (has_alpha) {
sink_template_caps = gst_pad_get_pad_template_caps (pad);
} else {
GstVideoAggregatorClass *klass = GST_VIDEO_AGGREGATOR_GET_CLASS (vagg);
sink_template_caps = gst_caps_ref (klass->sink_non_alpha_caps);
}
{
GstCaps *intersect = gst_caps_intersect (returned_caps, sink_template_caps);
gst_caps_unref (returned_caps);
returned_caps = intersect;
}
gst_caps_unref (template_caps);
gst_caps_unref (sink_template_caps);
GST_DEBUG_OBJECT (pad, "Returning caps: %" GST_PTR_FORMAT, returned_caps);
return returned_caps;
}
static void
gst_video_aggregator_update_qos (GstVideoAggregator * vagg, gdouble proportion,
GstClockTimeDiff diff, GstClockTime timestamp)
{
gboolean live;
GST_DEBUG_OBJECT (vagg,
"Updating QoS: proportion %lf, diff %" GST_STIME_FORMAT ", timestamp %"
GST_TIME_FORMAT, proportion, GST_STIME_ARGS (diff),
GST_TIME_ARGS (timestamp));
live =
GST_CLOCK_TIME_IS_VALID (gst_aggregator_get_latency (GST_AGGREGATOR
(vagg)));
GST_OBJECT_LOCK (vagg);
vagg->priv->proportion = proportion;
if (G_LIKELY (timestamp != GST_CLOCK_TIME_NONE)) {
if (!live && G_UNLIKELY (diff > 0))
vagg->priv->earliest_time =
timestamp + 2 * diff + gst_util_uint64_scale_int_round (GST_SECOND,
GST_VIDEO_INFO_FPS_D (&vagg->info),
GST_VIDEO_INFO_FPS_N (&vagg->info));
else
vagg->priv->earliest_time = timestamp + diff;
} else {
vagg->priv->earliest_time = GST_CLOCK_TIME_NONE;
}
GST_OBJECT_UNLOCK (vagg);
}
static void
gst_video_aggregator_reset_qos (GstVideoAggregator * vagg)
{
gst_video_aggregator_update_qos (vagg, 0.5, 0, GST_CLOCK_TIME_NONE);
vagg->priv->qos_processed = vagg->priv->qos_dropped = 0;
}
static void
gst_video_aggregator_read_qos (GstVideoAggregator * vagg, gdouble * proportion,
GstClockTime * time)
{
GST_OBJECT_LOCK (vagg);
*proportion = vagg->priv->proportion;
*time = vagg->priv->earliest_time;
GST_OBJECT_UNLOCK (vagg);
}
static void
gst_video_aggregator_reset (GstVideoAggregator * vagg)
{
GstAggregator *agg = GST_AGGREGATOR (vagg);
GList *l;
gst_video_info_init (&vagg->info);
vagg->priv->ts_offset = 0;
vagg->priv->nframes = 0;
vagg->priv->live = FALSE;
agg->segment.position = -1;
gst_video_aggregator_reset_qos (vagg);
GST_OBJECT_LOCK (vagg);
for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
GstVideoAggregatorPad *p = l->data;
gst_buffer_replace (&p->buffer, NULL);
p->priv->start_time = -1;
p->priv->end_time = -1;
gst_video_info_init (&p->info);
}
GST_OBJECT_UNLOCK (vagg);
}
#define GST_FLOW_NEEDS_DATA GST_FLOW_CUSTOM_ERROR
static gint
gst_video_aggregator_fill_queues (GstVideoAggregator * vagg,
GstClockTime output_start_running_time,
GstClockTime output_end_running_time)
{
GstAggregator *agg = GST_AGGREGATOR (vagg);
GList *l;
gboolean eos = TRUE;
gboolean need_more_data = FALSE;
/* get a set of buffers into pad->buffer that are within output_start_running_time
* and output_end_running_time taking into account finished and unresponsive pads */
GST_OBJECT_LOCK (vagg);
for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
GstVideoAggregatorPad *pad = l->data;
GstSegment segment;
GstAggregatorPad *bpad;
GstBuffer *buf;
GstVideoInfo *vinfo;
gboolean is_eos;
bpad = GST_AGGREGATOR_PAD (pad);
GST_OBJECT_LOCK (bpad);
segment = bpad->segment;
GST_OBJECT_UNLOCK (bpad);
is_eos = gst_aggregator_pad_is_eos (bpad);
if (!is_eos)
eos = FALSE;
buf = gst_aggregator_pad_get_buffer (bpad);
if (buf) {
GstClockTime start_time, end_time;
start_time = GST_BUFFER_TIMESTAMP (buf);
if (start_time == -1) {
gst_buffer_unref (buf);
GST_DEBUG_OBJECT (pad, "Need timestamped buffers!");
GST_OBJECT_UNLOCK (vagg);
return GST_FLOW_ERROR;
}
vinfo = &pad->info;
/* FIXME: Make all this work with negative rates */
end_time = GST_BUFFER_DURATION (buf);
if (end_time == -1) {
start_time = MAX (start_time, segment.start);
start_time =
gst_segment_to_running_time (&segment, GST_FORMAT_TIME, start_time);
if (start_time >= output_end_running_time) {
if (pad->buffer) {
GST_DEBUG_OBJECT (pad, "buffer duration is -1, start_time >= "
"output_end_running_time. Keeping previous buffer");
} else {
GST_DEBUG_OBJECT (pad, "buffer duration is -1, start_time >= "
"output_end_running_time. No previous buffer.");
}
gst_buffer_unref (buf);
continue;
} else if (start_time < output_start_running_time) {
GST_DEBUG_OBJECT (pad, "buffer duration is -1, start_time < "
"output_start_running_time. Discarding old buffer");
gst_buffer_replace (&pad->buffer, buf);
pad->buffer_vinfo = *vinfo;
gst_buffer_unref (buf);
gst_aggregator_pad_drop_buffer (bpad);
need_more_data = TRUE;
continue;
}
gst_buffer_unref (buf);
buf = gst_aggregator_pad_steal_buffer (bpad);
gst_buffer_replace (&pad->buffer, buf);
pad->buffer_vinfo = *vinfo;
/* FIXME: Set start_time and end_time to something here? */
gst_buffer_unref (buf);
GST_DEBUG_OBJECT (pad, "buffer duration is -1");
continue;
}
g_assert (start_time != -1 && end_time != -1);
end_time += start_time; /* convert from duration to position */
/* Check if it's inside the segment */
if (start_time >= segment.stop || end_time < segment.start) {
GST_DEBUG_OBJECT (pad,
"Buffer outside the segment : segment: [%" GST_TIME_FORMAT " -- %"
GST_TIME_FORMAT "]" " Buffer [%" GST_TIME_FORMAT " -- %"
GST_TIME_FORMAT "]", GST_TIME_ARGS (segment.stop),
GST_TIME_ARGS (segment.start), GST_TIME_ARGS (start_time),
GST_TIME_ARGS (end_time));
gst_buffer_unref (buf);
gst_aggregator_pad_drop_buffer (bpad);
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 (ABS (agg->segment.rate) != 1.0) {
start_time *= ABS (agg->segment.rate);
end_time *= ABS (agg->segment.rate);
}
GST_TRACE_OBJECT (pad, "dealing with buffer %p start %" GST_TIME_FORMAT
" end %" GST_TIME_FORMAT " out start %" GST_TIME_FORMAT
" out end %" GST_TIME_FORMAT, buf, GST_TIME_ARGS (start_time),
GST_TIME_ARGS (end_time), GST_TIME_ARGS (output_start_running_time),
GST_TIME_ARGS (output_end_running_time));
if (pad->priv->end_time != -1 && pad->priv->end_time > end_time) {
GST_DEBUG_OBJECT (pad, "Buffer from the past, dropping");
gst_buffer_unref (buf);
gst_aggregator_pad_drop_buffer (bpad);
continue;
}
if (end_time >= output_start_running_time
&& start_time < output_end_running_time) {
GST_DEBUG_OBJECT (pad,
"Taking new buffer with start time %" GST_TIME_FORMAT,
GST_TIME_ARGS (start_time));
gst_buffer_replace (&pad->buffer, buf);
pad->buffer_vinfo = *vinfo;
pad->priv->start_time = start_time;
pad->priv->end_time = end_time;
gst_buffer_unref (buf);
gst_aggregator_pad_drop_buffer (bpad);
eos = FALSE;
} else if (start_time >= output_end_running_time) {
GST_DEBUG_OBJECT (pad, "Keeping buffer until %" GST_TIME_FORMAT,
GST_TIME_ARGS (start_time));
gst_buffer_unref (buf);
eos = FALSE;
} else {
gst_buffer_replace (&pad->buffer, buf);
pad->buffer_vinfo = *vinfo;
pad->priv->start_time = start_time;
pad->priv->end_time = end_time;
GST_DEBUG_OBJECT (pad,
"replacing old buffer with a newer buffer, start %" GST_TIME_FORMAT
" out end %" GST_TIME_FORMAT, GST_TIME_ARGS (start_time),
GST_TIME_ARGS (output_end_running_time));
gst_buffer_unref (buf);
gst_aggregator_pad_drop_buffer (bpad);
need_more_data = TRUE;
continue;
}
} else {
if (is_eos && pad->ignore_eos) {
eos = FALSE;
GST_DEBUG_OBJECT (pad, "ignoring EOS and re-using previous buffer");
continue;
}
if (pad->priv->end_time != -1) {
if (pad->priv->end_time <= output_start_running_time) {
pad->priv->start_time = pad->priv->end_time = -1;
if (is_eos) {
GST_DEBUG ("I just need more data");
need_more_data = TRUE;
}
} else if (is_eos) {
eos = FALSE;
}
} else if (is_eos) {
gst_buffer_replace (&pad->buffer, NULL);
}
}
}
GST_OBJECT_UNLOCK (vagg);
if (need_more_data)
return GST_FLOW_NEEDS_DATA;
if (eos)
return GST_FLOW_EOS;
return GST_FLOW_OK;
}
static gboolean
sync_pad_values (GstVideoAggregator * vagg, GstVideoAggregatorPad * pad)
{
GstAggregatorPad *bpad = GST_AGGREGATOR_PAD (pad);
GstClockTime timestamp;
gint64 stream_time;
if (pad->buffer == NULL)
return TRUE;
timestamp = GST_BUFFER_TIMESTAMP (pad->buffer);
GST_OBJECT_LOCK (bpad);
stream_time = gst_segment_to_stream_time (&bpad->segment, GST_FORMAT_TIME,
timestamp);
GST_OBJECT_UNLOCK (bpad);
/* sync object properties on stream time */
if (GST_CLOCK_TIME_IS_VALID (stream_time))
gst_object_sync_values (GST_OBJECT (pad), stream_time);
return TRUE;
}
static gboolean
prepare_frames (GstVideoAggregator * vagg, GstVideoAggregatorPad * pad)
{
GstVideoAggregatorPadClass *vaggpad_class =
GST_VIDEO_AGGREGATOR_PAD_GET_CLASS (pad);
if (pad->buffer == NULL || !vaggpad_class->prepare_frame)
return TRUE;
return vaggpad_class->prepare_frame (pad, vagg);
}
static gboolean
clean_pad (GstVideoAggregator * vagg, GstVideoAggregatorPad * pad)
{
GstVideoAggregatorPadClass *vaggpad_class =
GST_VIDEO_AGGREGATOR_PAD_GET_CLASS (pad);
vaggpad_class->clean_frame (pad, vagg);
return TRUE;
}
static GstFlowReturn
gst_video_aggregator_do_aggregate (GstVideoAggregator * vagg,
GstClockTime output_start_time, GstClockTime output_end_time,
GstBuffer ** outbuf)
{
GstFlowReturn ret = GST_FLOW_OK;
GstElementClass *klass = GST_ELEMENT_GET_CLASS (vagg);
GstVideoAggregatorClass *vagg_klass = (GstVideoAggregatorClass *) klass;
GstVideoAggregatorPadClass *vaggpad_class = g_type_class_peek
(GST_AGGREGATOR_CLASS (klass)->sinkpads_type);
g_assert (vagg_klass->aggregate_frames != NULL);
g_assert (vagg_klass->get_output_buffer != NULL);
if ((ret = vagg_klass->get_output_buffer (vagg, outbuf)) != GST_FLOW_OK) {
GST_WARNING_OBJECT (vagg, "Could not get an output buffer, reason: %s",
gst_flow_get_name (ret));
return ret;
}
if (*outbuf == NULL) {
/* sub-class doesn't want to generate output right now */
return GST_FLOW_OK;
}
GST_BUFFER_TIMESTAMP (*outbuf) = output_start_time;
GST_BUFFER_DURATION (*outbuf) = output_end_time - output_start_time;
/* Sync pad properties to the stream time */
gst_aggregator_iterate_sinkpads (GST_AGGREGATOR (vagg),
(GstAggregatorPadForeachFunc) sync_pad_values, NULL);
/* Convert all the frames the subclass has before aggregating */
gst_aggregator_iterate_sinkpads (GST_AGGREGATOR (vagg),
(GstAggregatorPadForeachFunc) prepare_frames, NULL);
ret = vagg_klass->aggregate_frames (vagg, *outbuf);
if (vaggpad_class->clean_frame) {
gst_aggregator_iterate_sinkpads (GST_AGGREGATOR (vagg),
(GstAggregatorPadForeachFunc) clean_pad, NULL);
}
return ret;
}
/* 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_video_aggregator_do_qos (GstVideoAggregator * vagg, GstClockTime timestamp)
{
GstAggregator *agg = GST_AGGREGATOR (vagg);
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 (vagg, "invalid timestamp, can't do QoS, process frame");
return -1;
}
/* get latest QoS observation values */
gst_video_aggregator_read_qos (vagg, &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 (vagg, "no observation yet, process frame");
return -1;
}
/* qos is done on running time */
qostime =
gst_segment_to_running_time (&agg->segment, GST_FORMAT_TIME, timestamp);
/* see how our next timestamp relates to the latest qos timestamp */
GST_LOG_OBJECT (vagg, "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 (vagg, "we are late, drop frame");
return jitter;
}
GST_LOG_OBJECT (vagg, "process frame");
return jitter;
}
static GstClockTime
gst_video_aggregator_get_next_time (GstAggregator * agg)
{
GstClockTime next_time;
GST_OBJECT_LOCK (agg);
if (agg->segment.position == -1 || agg->segment.position < agg->segment.start)
next_time = agg->segment.start;
else
next_time = agg->segment.position;
if (agg->segment.stop != -1 && next_time > agg->segment.stop)
next_time = agg->segment.stop;
next_time =
gst_segment_to_running_time (&agg->segment, GST_FORMAT_TIME, next_time);
GST_OBJECT_UNLOCK (agg);
return next_time;
}
static GstFlowReturn
gst_video_aggregator_check_reconfigure (GstVideoAggregator * vagg,
gboolean timeout)
{
GstAggregator *agg = (GstAggregator *) vagg;
if (GST_VIDEO_INFO_FORMAT (&vagg->info) == GST_VIDEO_FORMAT_UNKNOWN
|| gst_pad_check_reconfigure (GST_AGGREGATOR_SRC_PAD (vagg))) {
gboolean ret;
ret = gst_video_aggregator_update_src_caps (vagg);
if (!ret) {
if (timeout && gst_pad_needs_reconfigure (GST_AGGREGATOR_SRC_PAD (vagg))) {
guint64 frame_duration;
gint fps_d, fps_n;
GST_DEBUG_OBJECT (vagg,
"Got timeout before receiving any caps, don't output anything");
if (agg->segment.position == -1) {
if (agg->segment.rate > 0.0)
agg->segment.position = agg->segment.start;
else
agg->segment.position = agg->segment.stop;
}
/* Advance position */
fps_d = GST_VIDEO_INFO_FPS_D (&vagg->info) ?
GST_VIDEO_INFO_FPS_D (&vagg->info) : 1;
fps_n = GST_VIDEO_INFO_FPS_N (&vagg->info) ?
GST_VIDEO_INFO_FPS_N (&vagg->info) : 25;
/* Default to 25/1 if no "best fps" is known */
frame_duration = gst_util_uint64_scale (GST_SECOND, fps_d, fps_n);
if (agg->segment.rate > 0.0)
agg->segment.position += frame_duration;
else if (agg->segment.position > frame_duration)
agg->segment.position -= frame_duration;
else
agg->segment.position = 0;
vagg->priv->nframes++;
return GST_FLOW_NEEDS_DATA;
} else {
return GST_FLOW_NOT_NEGOTIATED;
}
}
}
return GST_FLOW_OK;
}
static GstFlowReturn
gst_video_aggregator_aggregate (GstAggregator * agg, gboolean timeout)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
GstClockTime output_start_time, output_end_time;
GstClockTime output_start_running_time, output_end_running_time;
GstBuffer *outbuf = NULL;
GstFlowReturn flow_ret;
gint64 jitter;
GST_VIDEO_AGGREGATOR_LOCK (vagg);
flow_ret = gst_video_aggregator_check_reconfigure (vagg, timeout);
if (flow_ret != GST_FLOW_OK) {
if (flow_ret == GST_FLOW_NEEDS_DATA)
flow_ret = GST_FLOW_OK;
goto unlock_and_return;
}
output_start_time = agg->segment.position;
if (agg->segment.position == -1 || agg->segment.position < agg->segment.start)
output_start_time = agg->segment.start;
if (vagg->priv->nframes == 0) {
vagg->priv->ts_offset = output_start_time;
GST_DEBUG_OBJECT (vagg, "New ts offset %" GST_TIME_FORMAT,
GST_TIME_ARGS (output_start_time));
}
if (GST_VIDEO_INFO_FPS_N (&vagg->info) == 0) {
output_end_time = -1;
} else {
output_end_time =
vagg->priv->ts_offset +
gst_util_uint64_scale_round (vagg->priv->nframes + 1,
GST_SECOND * GST_VIDEO_INFO_FPS_D (&vagg->info),
GST_VIDEO_INFO_FPS_N (&vagg->info));
}
if (agg->segment.stop != -1)
output_end_time = MIN (output_end_time, agg->segment.stop);
output_start_running_time =
gst_segment_to_running_time (&agg->segment, GST_FORMAT_TIME,
output_start_time);
output_end_running_time =
gst_segment_to_running_time (&agg->segment, GST_FORMAT_TIME,
output_end_time);
if (output_end_time == output_start_time) {
flow_ret = GST_FLOW_EOS;
} else {
flow_ret =
gst_video_aggregator_fill_queues (vagg, output_start_running_time,
output_end_running_time);
}
if (flow_ret == GST_FLOW_NEEDS_DATA && !timeout) {
GST_DEBUG_OBJECT (vagg, "Need more data for decisions");
flow_ret = GST_FLOW_OK;
goto unlock_and_return;
} else if (flow_ret == GST_FLOW_EOS) {
GST_DEBUG_OBJECT (vagg, "All sinkpads are EOS -- forwarding");
goto unlock_and_return;
} else if (flow_ret == GST_FLOW_ERROR) {
GST_WARNING_OBJECT (vagg, "Error collecting buffers");
goto unlock_and_return;
}
GST_DEBUG_OBJECT (vagg,
"Producing buffer for %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT
", running time start %" GST_TIME_FORMAT ", running time end %"
GST_TIME_FORMAT, GST_TIME_ARGS (output_start_time),
GST_TIME_ARGS (output_end_time),
GST_TIME_ARGS (output_start_running_time),
GST_TIME_ARGS (output_end_running_time));
jitter = gst_video_aggregator_do_qos (vagg, output_start_time);
if (jitter <= 0) {
flow_ret = gst_video_aggregator_do_aggregate (vagg, output_start_time,
output_end_time, &outbuf);
if (flow_ret != GST_FLOW_OK)
goto done;
vagg->priv->qos_processed++;
} else {
GstMessage *msg;
vagg->priv->qos_dropped++;
msg =
gst_message_new_qos (GST_OBJECT_CAST (vagg), vagg->priv->live,
output_start_running_time, gst_segment_to_stream_time (&agg->segment,
GST_FORMAT_TIME, output_start_time), output_start_time,
output_end_time - output_start_time);
gst_message_set_qos_values (msg, jitter, vagg->priv->proportion, 1000000);
gst_message_set_qos_stats (msg, GST_FORMAT_BUFFERS,
vagg->priv->qos_processed, vagg->priv->qos_dropped);
gst_element_post_message (GST_ELEMENT_CAST (vagg), msg);
flow_ret = GST_FLOW_OK;
}
GST_VIDEO_AGGREGATOR_UNLOCK (vagg);
if (outbuf) {
GST_DEBUG_OBJECT (vagg,
"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)));
flow_ret = gst_aggregator_finish_buffer (agg, outbuf);
}
GST_VIDEO_AGGREGATOR_LOCK (vagg);
vagg->priv->nframes++;
agg->segment.position = output_end_time;
GST_VIDEO_AGGREGATOR_UNLOCK (vagg);
return flow_ret;
done:
if (outbuf)
gst_buffer_unref (outbuf);
unlock_and_return:
GST_VIDEO_AGGREGATOR_UNLOCK (vagg);
return flow_ret;
}
/* FIXME, the duration query should reflect how long you will produce
* data, that is the amount of stream time until you will emit EOS.
*
* For synchronized aggregating this is always the max of all the durations
* of upstream since we emit EOS when all of them finished.
*
* We don't do synchronized aggregating so this really depends on where the
* streams where punched in and what their relative offsets are against
* each other which we can get from the first timestamps we see.
*
* When we add a new stream (or remove a stream) the duration might
* also become invalid again and we need to post a new DURATION
* message to notify this fact to the parent.
* For now we take the max of all the upstream elements so the simple
* cases work at least somewhat.
*/
static gboolean
gst_video_aggregator_query_duration (GstVideoAggregator * vagg,
GstQuery * query)
{
GValue item = { 0 };
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 (vagg));
while (!done) {
switch (gst_iterator_next (it, &item)) {
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_OK:
{
GstPad *pad;
gint64 duration;
pad = g_value_get_object (&item);
/* ask sink peer for duration */
res &= gst_pad_peer_query_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;
}
g_value_reset (&item);
break;
}
case GST_ITERATOR_RESYNC:
max = -1;
res = TRUE;
gst_iterator_resync (it);
break;
default:
res = FALSE;
done = TRUE;
break;
}
}
g_value_unset (&item);
gst_iterator_free (it);
if (res) {
/* and store the max */
GST_DEBUG_OBJECT (vagg, "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_video_aggregator_src_query (GstAggregator * agg, GstQuery * query)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
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 (&agg->segment, GST_FORMAT_TIME,
agg->segment.position));
res = TRUE;
break;
default:
break;
}
break;
}
case GST_QUERY_DURATION:
res = gst_video_aggregator_query_duration (vagg, query);
break;
case GST_QUERY_LATENCY:
res =
GST_AGGREGATOR_CLASS (gst_video_aggregator_parent_class)->src_query
(agg, query);
if (res) {
gst_query_parse_latency (query, &vagg->priv->live, NULL, NULL);
}
break;
default:
res =
GST_AGGREGATOR_CLASS (gst_video_aggregator_parent_class)->src_query
(agg, query);
break;
}
return res;
}
static gboolean
gst_video_aggregator_src_event (GstAggregator * agg, GstEvent * event)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_QOS:
{
GstQOSType type;
GstClockTimeDiff diff;
GstClockTime timestamp;
gdouble proportion;
gst_event_parse_qos (event, &type, &proportion, &diff, &timestamp);
gst_video_aggregator_update_qos (vagg, proportion, diff, timestamp);
break;
}
case GST_EVENT_SEEK:
{
GST_DEBUG_OBJECT (vagg, "Handling SEEK event");
}
default:
break;
}
return
GST_AGGREGATOR_CLASS (gst_video_aggregator_parent_class)->src_event (agg,
event);
}
static GstFlowReturn
gst_video_aggregator_flush (GstAggregator * agg)
{
GList *l;
gdouble abs_rate;
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
GST_INFO_OBJECT (agg, "Flushing");
GST_OBJECT_LOCK (vagg);
abs_rate = ABS (agg->segment.rate);
for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
GstVideoAggregatorPad *p = l->data;
/* Convert to the output segment rate */
if (ABS (agg->segment.rate) != abs_rate) {
if (ABS (agg->segment.rate) != 1.0 && p->buffer) {
p->priv->start_time /= ABS (agg->segment.rate);
p->priv->end_time /= ABS (agg->segment.rate);
}
if (abs_rate != 1.0 && p->buffer) {
p->priv->start_time *= abs_rate;
p->priv->end_time *= abs_rate;
}
}
}
GST_OBJECT_UNLOCK (vagg);
agg->segment.position = -1;
vagg->priv->ts_offset = 0;
vagg->priv->nframes = 0;
gst_video_aggregator_reset_qos (vagg);
return GST_FLOW_OK;
}
static gboolean
gst_video_aggregator_sink_event (GstAggregator * agg, GstAggregatorPad * bpad,
GstEvent * event)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (bpad);
gboolean ret = TRUE;
GST_DEBUG_OBJECT (pad, "Got %s event on pad %s:%s",
GST_EVENT_TYPE_NAME (event), GST_DEBUG_PAD_NAME (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
ret =
gst_video_aggregator_pad_sink_setcaps (GST_PAD (pad),
GST_OBJECT (vagg), caps);
gst_event_unref (event);
event = NULL;
break;
}
case GST_EVENT_SEGMENT:{
GstSegment seg;
gst_event_copy_segment (event, &seg);
g_assert (seg.format == GST_FORMAT_TIME);
gst_video_aggregator_reset_qos (vagg);
break;
}
default:
break;
}
if (event != NULL)
return GST_AGGREGATOR_CLASS (gst_video_aggregator_parent_class)->sink_event
(agg, bpad, event);
return ret;
}
static gboolean
gst_video_aggregator_start (GstAggregator * agg)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
gst_caps_replace (&vagg->priv->current_caps, NULL);
return TRUE;
}
static gboolean
gst_video_aggregator_stop (GstAggregator * agg)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
gst_video_aggregator_reset (vagg);
return TRUE;
}
/* GstElement vmethods */
static GstPad *
gst_video_aggregator_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
{
GstVideoAggregator *vagg;
GstVideoAggregatorPad *vaggpad;
vagg = GST_VIDEO_AGGREGATOR (element);
vaggpad = (GstVideoAggregatorPad *)
GST_ELEMENT_CLASS (gst_video_aggregator_parent_class)->request_new_pad
(element, templ, req_name, caps);
if (vaggpad == NULL)
return NULL;
GST_OBJECT_LOCK (vagg);
vaggpad->zorder = GST_ELEMENT (vagg)->numsinkpads;
vaggpad->priv->start_time = -1;
vaggpad->priv->end_time = -1;
element->sinkpads = g_list_sort (element->sinkpads,
(GCompareFunc) pad_zorder_compare);
GST_OBJECT_UNLOCK (vagg);
gst_child_proxy_child_added (GST_CHILD_PROXY (vagg), G_OBJECT (vaggpad),
GST_OBJECT_NAME (vaggpad));
return GST_PAD (vaggpad);
}
static void
gst_video_aggregator_release_pad (GstElement * element, GstPad * pad)
{
GstVideoAggregator *vagg = NULL;
GstVideoAggregatorPad *vaggpad;
gboolean last_pad;
vagg = GST_VIDEO_AGGREGATOR (element);
vaggpad = GST_VIDEO_AGGREGATOR_PAD (pad);
GST_VIDEO_AGGREGATOR_LOCK (vagg);
GST_OBJECT_LOCK (vagg);
last_pad = (GST_ELEMENT (vagg)->numsinkpads - 1 == 0);
GST_OBJECT_UNLOCK (vagg);
if (last_pad)
gst_video_aggregator_reset (vagg);
gst_buffer_replace (&vaggpad->buffer, NULL);
gst_child_proxy_child_removed (GST_CHILD_PROXY (vagg), G_OBJECT (vaggpad),
GST_OBJECT_NAME (vaggpad));
GST_ELEMENT_CLASS (gst_video_aggregator_parent_class)->release_pad
(GST_ELEMENT (vagg), pad);
gst_pad_mark_reconfigure (GST_AGGREGATOR_SRC_PAD (vagg));
GST_VIDEO_AGGREGATOR_UNLOCK (vagg);
return;
}
static GstFlowReturn
gst_video_aggregator_get_output_buffer (GstVideoAggregator * videoaggregator,
GstBuffer ** outbuf)
{
guint outsize;
static GstAllocationParams params = { 0, 15, 0, 0, };
outsize = GST_VIDEO_INFO_SIZE (&videoaggregator->info);
*outbuf = gst_buffer_new_allocate (NULL, outsize, &params);
if (*outbuf == NULL) {
GST_ERROR_OBJECT (videoaggregator,
"Could not instantiate buffer of size: %d", outsize);
}
return GST_FLOW_OK;
}
static gboolean
gst_video_aggregator_pad_sink_acceptcaps (GstPad * pad,
GstVideoAggregator * vagg, GstCaps * caps)
{
gboolean ret;
GstCaps *modified_caps;
GstCaps *accepted_caps;
GstCaps *template_caps;
gboolean had_current_caps = TRUE;
gint i, n;
GstStructure *s;
GstAggregator *agg = GST_AGGREGATOR (vagg);
GST_DEBUG_OBJECT (pad, "%" GST_PTR_FORMAT, caps);
accepted_caps = gst_pad_get_current_caps (GST_PAD (agg->srcpad));
template_caps = gst_pad_get_pad_template_caps (GST_PAD (agg->srcpad));
if (accepted_caps == NULL) {
accepted_caps = template_caps;
had_current_caps = FALSE;
}
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);
gst_structure_remove_fields (s, "colorimetry", "chroma-site", "format",
"pixel-aspect-ratio", NULL);
}
modified_caps = gst_caps_intersect (accepted_caps, template_caps);
ret = gst_caps_can_intersect (caps, accepted_caps);
GST_DEBUG_OBJECT (pad, "%saccepted caps %" GST_PTR_FORMAT,
(ret ? "" : "not "), caps);
gst_caps_unref (accepted_caps);
gst_caps_unref (modified_caps);
if (had_current_caps)
gst_caps_unref (template_caps);
return ret;
}
static gboolean
gst_video_aggregator_sink_query (GstAggregator * agg, GstAggregatorPad * bpad,
GstQuery * query)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (bpad);
gboolean ret = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
{
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
caps =
gst_video_aggregator_pad_sink_getcaps (GST_PAD (pad), vagg, filter);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
ret = TRUE;
break;
}
case GST_QUERY_ACCEPT_CAPS:
{
GstCaps *caps;
gst_query_parse_accept_caps (query, &caps);
ret =
gst_video_aggregator_pad_sink_acceptcaps (GST_PAD (pad), vagg, caps);
gst_query_set_accept_caps_result (query, ret);
ret = TRUE;
break;
}
default:
ret =
GST_AGGREGATOR_CLASS (gst_video_aggregator_parent_class)->sink_query
(agg, bpad, query);
break;
}
return ret;
}
/* GObject vmethods */
static void
gst_video_aggregator_finalize (GObject * o)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (o);
g_mutex_clear (&vagg->priv->lock);
G_OBJECT_CLASS (gst_video_aggregator_parent_class)->finalize (o);
}
static void
gst_video_aggregator_dispose (GObject * o)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (o);
gst_caps_replace (&vagg->priv->current_caps, NULL);
G_OBJECT_CLASS (gst_video_aggregator_parent_class)->dispose (o);
}
static void
gst_video_aggregator_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_video_aggregator_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* GObject boilerplate */
static void
gst_video_aggregator_class_init (GstVideoAggregatorClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
GstAggregatorClass *agg_class = (GstAggregatorClass *) klass;
GST_DEBUG_CATEGORY_INIT (gst_video_aggregator_debug, "videoaggregator", 0,
"base video aggregator");
gst_video_aggregator_parent_class = g_type_class_peek_parent (klass);
g_type_class_add_private (klass, sizeof (GstVideoAggregatorPrivate));
gobject_class->finalize = gst_video_aggregator_finalize;
gobject_class->dispose = gst_video_aggregator_dispose;
gobject_class->get_property = gst_video_aggregator_get_property;
gobject_class->set_property = gst_video_aggregator_set_property;
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_video_aggregator_request_new_pad);
gstelement_class->release_pad =
GST_DEBUG_FUNCPTR (gst_video_aggregator_release_pad);
agg_class->sinkpads_type = GST_TYPE_VIDEO_AGGREGATOR_PAD;
agg_class->start = gst_video_aggregator_start;
agg_class->stop = gst_video_aggregator_stop;
agg_class->sink_query = gst_video_aggregator_sink_query;
agg_class->sink_event = gst_video_aggregator_sink_event;
agg_class->flush = gst_video_aggregator_flush;
agg_class->aggregate = gst_video_aggregator_aggregate;
agg_class->src_event = gst_video_aggregator_src_event;
agg_class->src_query = gst_video_aggregator_src_query;
agg_class->get_next_time = gst_video_aggregator_get_next_time;
klass->find_best_format = gst_video_aggregator_find_best_format;
klass->get_output_buffer = gst_video_aggregator_get_output_buffer;
klass->update_caps = gst_video_aggregator_default_update_caps;
klass->fixate_caps = gst_video_aggregator_default_fixate_caps;
/* Register the pad class */
g_type_class_ref (GST_TYPE_VIDEO_AGGREGATOR_PAD);
}
static inline GstCaps *
_get_non_alpha_caps_from_template (GstVideoAggregatorClass * klass)
{
GstCaps *result;
GstCaps *templatecaps;
guint i, size;
templatecaps =
gst_pad_template_get_caps (gst_element_class_get_pad_template
(GST_ELEMENT_CLASS (klass), "sink_%u"));
size = gst_caps_get_size (templatecaps);
result = gst_caps_new_empty ();
for (i = 0; i < size; i++) {
GstStructure *s = gst_caps_get_structure (templatecaps, i);
const GValue *formats = gst_structure_get_value (s, "format");
GValue new_formats = { 0, };
gboolean has_format = FALSE;
/* FIXME what to do if formats are missing? */
if (formats) {
const GstVideoFormatInfo *info;
if (GST_VALUE_HOLDS_LIST (formats)) {
guint list_size = gst_value_list_get_size (formats);
guint index;
g_value_init (&new_formats, GST_TYPE_LIST);
for (index = 0; index < list_size; index++) {
const GValue *list_item = gst_value_list_get_value (formats, index);
info =
gst_video_format_get_info (gst_video_format_from_string
(g_value_get_string (list_item)));
if (!GST_VIDEO_FORMAT_INFO_HAS_ALPHA (info)) {
has_format = TRUE;
gst_value_list_append_value (&new_formats, list_item);
}
}
} else if (G_VALUE_HOLDS_STRING (formats)) {
info =
gst_video_format_get_info (gst_video_format_from_string
(g_value_get_string (formats)));
if (!GST_VIDEO_FORMAT_INFO_HAS_ALPHA (info)) {
has_format = TRUE;
gst_value_init_and_copy (&new_formats, formats);
}
} else {
g_assert_not_reached ();
GST_WARNING ("Unexpected type for video 'format' field: %s",
G_VALUE_TYPE_NAME (formats));
}
if (has_format) {
s = gst_structure_copy (s);
gst_structure_take_value (s, "format", &new_formats);
gst_caps_append_structure (result, s);
}
}
}
gst_caps_unref (templatecaps);
return result;
}
static GMutex sink_caps_mutex;
static void
gst_video_aggregator_init (GstVideoAggregator * vagg,
GstVideoAggregatorClass * klass)
{
vagg->priv =
G_TYPE_INSTANCE_GET_PRIVATE (vagg, GST_TYPE_VIDEO_AGGREGATOR,
GstVideoAggregatorPrivate);
vagg->priv->current_caps = NULL;
g_mutex_init (&vagg->priv->lock);
/* initialize variables */
g_mutex_lock (&sink_caps_mutex);
if (klass->sink_non_alpha_caps == NULL) {
klass->sink_non_alpha_caps = _get_non_alpha_caps_from_template (klass);
/* The caps is cached */
GST_MINI_OBJECT_FLAG_SET (klass->sink_non_alpha_caps,
GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
}
g_mutex_unlock (&sink_caps_mutex);
gst_video_aggregator_reset (vagg);
}
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