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gstreamer/gst-libs/gst/video/gstvideoaggregator.c
Nirbheek Chauhan b395c055eb videoaggregator: add "ignore-eos" property for input pads 
When set, it causes videoaggregator to repeatedly aggregate the last buffer on
an EOS pad instead of skipping it and outputting silence. This is useful, for
instance, while playing back files seamless one after the other, to avoid
videoaggregator ever outputting silence (the checkerboard pattern).

It is to be noted that if all the pads on videoaggregator have this property set
on them, the mixer will never forward EOS downstream for obvious reasons. Hence,
at least one pad with 'ignore-eos' set to FALSE must send EOS to the mixer
before it will be forwarded downstream.

https://bugzilla.gnome.org/show_bug.cgi?id=748946
2015-06-12 19:44:50 +01:00

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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_videoaggregator_debug);
#define GST_CAT_DEFAULT gst_videoaggregator_debug
/* Needed prototypes */
static void gst_videoaggregator_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_videoaggregator_pad,
GST_TYPE_AGGREGATOR_PAD);
static void
gst_videoaggregator_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_videoaggregator_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 gboolean
_flush_pad (GstAggregatorPad * aggpad, GstAggregator * aggregator)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (aggregator);
GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (aggpad);
gst_videoaggregator_reset_qos (vagg);
gst_buffer_replace (&pad->buffer, NULL);
pad->priv->start_time = -1;
pad->priv->end_time = -1;
return TRUE;
}
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_videoaggregator_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_videoaggregator_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_videoaggregator_pad_class_init (GstVideoAggregatorPadClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstAggregatorPadClass *aggpadclass = (GstAggregatorPadClass *) klass;
gobject_class->set_property = gst_videoaggregator_pad_set_property;
gobject_class->get_property = gst_videoaggregator_pad_get_property;
gobject_class->finalize = gst_videoaggregator_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, 10000, 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_videoaggregator_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_videoaggregator_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_videoaggregator_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_videoaggregator_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_videoaggregator_child_proxy_get_child_by_index;
iface->get_children_count =
gst_videoaggregator_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;
};
G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GstVideoAggregator, gst_videoaggregator,
GST_TYPE_AGGREGATOR, G_IMPLEMENT_INTERFACE (GST_TYPE_CHILD_PROXY,
gst_videoaggregator_child_proxy_init));
static void
gst_videoaggreagator_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
* NOTE: After calling that method you **have to** call
* gst_videoaggregator_update_src_caps (without releasing
* the GST_VIDEO_AGGREGATOR_LOCK in between)
*/
static gboolean
gst_videoaggregator_update_converters (GstVideoAggregator * vagg)
{
GList *tmp;
GstVideoFormat best_format;
GstVideoInfo best_info;
gboolean at_least_one_alpha = FALSE;
GstCaps *downstream_caps;
GstAggregator *agg = GST_AGGREGATOR (vagg);
GstVideoAggregatorClass *vagg_class = GST_VIDEO_AGGREGATOR_GET_CLASS (vagg);
GstVideoAggregatorPadClass *vaggpad_class = g_type_class_peek
(GST_AGGREGATOR_GET_CLASS (vagg)->sinkpads_type);
best_format = GST_VIDEO_FORMAT_UNKNOWN;
gst_video_info_init (&best_info);
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;
}
if (vagg_class->find_best_format) {
vagg_class->find_best_format (vagg, downstream_caps, &best_info,
&at_least_one_alpha);
best_format = GST_VIDEO_INFO_FORMAT (&best_info);
}
if (best_format == GST_VIDEO_FORMAT_UNKNOWN) {
downstream_caps = gst_caps_fixate (downstream_caps);
gst_video_info_from_caps (&best_info, downstream_caps);
best_format = GST_VIDEO_INFO_FORMAT (&best_info);
}
gst_caps_unref (downstream_caps);
if (at_least_one_alpha
&& !(best_info.finfo->flags & GST_VIDEO_FORMAT_FLAG_ALPHA)) {
GST_ELEMENT_ERROR (vagg, CORE, NEGOTIATION,
("At least one of the input pads contains alpha, but downstream can't support alpha."),
("Either convert your inputs to not contain alpha or add a videoconvert after the aggregator"));
return FALSE;
}
vagg->info = best_info;
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));
if (vaggpad_class->set_info) {
GST_OBJECT_LOCK (vagg);
/* Then browse the sinks once more, setting or unsetting conversion if needed */
for (tmp = GST_ELEMENT (vagg)->sinkpads; tmp; tmp = tmp->next) {
GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (tmp->data);
if (!vaggpad_class->set_info (pad, vagg, &pad->info, &best_info)) {
GST_OBJECT_UNLOCK (vagg);
return FALSE;
}
}
GST_OBJECT_UNLOCK (vagg);
}
return TRUE;
}
/* WITH GST_VIDEO_AGGREGATOR_LOCK TAKEN */
static gboolean
gst_videoaggregator_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->ts_offset = agg->segment.position - agg->segment.start;
vagg->priv->nframes = 0;
}
gst_videoaggregator_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;
}
/* WITH GST_VIDEO_AGGREGATOR_LOCK TAKEN */
static gboolean
gst_videoaggregator_update_src_caps (GstVideoAggregator * vagg)
{
GList *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;
GstElementClass *klass = GST_ELEMENT_GET_CLASS (vagg);
GstVideoAggregatorClass *vagg_klass = (GstVideoAggregatorClass *) klass;
GstAggregator *agg = GST_AGGREGATOR (vagg);
GST_OBJECT_LOCK (vagg);
for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
GstVideoAggregatorPad *mpad = l->data;
gint this_width, this_height;
gint fps_n, fps_d;
gint width, height;
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;
this_width = width;
this_height = height;
if (best_width < this_width)
best_width = this_width;
if (best_height < this_height)
best_height = this_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;
}
if (best_width > 0 && best_height > 0 && best_fps > 0) {
GstCaps *caps, *peercaps, *info_caps;
GstStructure *s;
GstVideoInfo info;
int i;
if (GST_VIDEO_INFO_FPS_N (&vagg->info) != best_fps_n ||
GST_VIDEO_INFO_FPS_D (&vagg->info) != best_fps_d) {
if (agg->segment.position != -1) {
vagg->priv->ts_offset = agg->segment.position - agg->segment.start;
vagg->priv->nframes = 0;
}
}
/* Initialize the video info with our target format and
* the best width and height and framerate. Then copy over
* all other fields as we negotiated them before
*/
gst_video_info_set_format (&info, GST_VIDEO_INFO_FORMAT (&vagg->info),
best_width, best_height);
info.fps_n = best_fps_n;
info.fps_d = best_fps_d;
info.chroma_site = vagg->info.chroma_site;
info.par_n = vagg->info.par_n;
info.par_d = vagg->info.par_d;
info.colorimetry = vagg->info.colorimetry;
info.flags = vagg->info.flags;
info.interlace_mode = vagg->info.interlace_mode;
info_caps = gst_video_info_to_caps (&info);
if (vagg_klass->update_caps) {
if (!(caps = vagg_klass->update_caps (vagg, info_caps))) {
gst_caps_unref (info_caps);
ret = FALSE;
goto done;
}
gst_caps_unref (info_caps);
} else {
caps = info_caps;
}
/* If the sub-class allows it, allow size/framerate changes */
if (!vagg_klass->preserve_update_caps_result) {
s = gst_caps_get_structure (caps, 0);
gst_structure_get (s, "width", G_TYPE_INT, &best_width, "height",
G_TYPE_INT, &best_height, NULL);
for (i = 0; i < gst_caps_get_size (caps); i++) {
s = gst_caps_get_structure (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);
}
}
peercaps = gst_pad_peer_query_caps (agg->srcpad, caps);
if (peercaps) {
GstCaps *tmp;
tmp = gst_caps_intersect (caps, peercaps);
GST_DEBUG_OBJECT (vagg, "intersecting %" GST_PTR_FORMAT
" with peer caps %" GST_PTR_FORMAT " result %" GST_PTR_FORMAT, caps,
peercaps, tmp);
gst_caps_unref (caps);
gst_caps_unref (peercaps);
caps = tmp; /* pass ownership */
if (gst_caps_is_empty (caps)) {
GST_DEBUG_OBJECT (vagg, "empty caps");
ret = FALSE;
gst_caps_unref (caps);
goto done;
}
caps = 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_fixate_field_nearest_fraction (s, "pixel-aspect-ratio", 1,
1);
/* fixate the the rest of the fields */
caps = gst_caps_fixate (caps);
gst_structure_get_int (s, "width", &info.width);
gst_structure_get_int (s, "height", &info.height);
gst_structure_get_fraction (s, "framerate", &info.fps_n, &info.fps_d);
}
if (gst_videoaggregator_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_videoaggregator_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);
if (GST_VIDEO_INFO_FORMAT (&vagg->info) != GST_VIDEO_FORMAT_UNKNOWN) {
if (GST_VIDEO_INFO_PAR_N (&vagg->info) != GST_VIDEO_INFO_PAR_N (&info)
|| GST_VIDEO_INFO_PAR_D (&vagg->info) != GST_VIDEO_INFO_PAR_D (&info) ||
GST_VIDEO_INFO_INTERLACE_MODE (&vagg->info) !=
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 GstCaps *
gst_videoaggregator_pad_sink_getcaps (GstPad * pad, GstVideoAggregator * vagg,
GstCaps * filter)
{
GstCaps *srccaps;
GstCaps *template_caps;
GstCaps *filtered_caps;
GstCaps *returned_caps;
GstStructure *s;
gboolean had_current_caps = TRUE;
gint i, n;
GstAggregator *agg = GST_AGGREGATOR (vagg);
template_caps = gst_pad_get_pad_template_caps (GST_PAD (agg->srcpad));
srccaps = gst_pad_get_current_caps (GST_PAD (agg->srcpad));
if (srccaps == NULL) {
had_current_caps = FALSE;
srccaps = template_caps;
}
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);
gst_structure_remove_fields (s, "colorimetry", "chroma-site", "format",
NULL);
}
filtered_caps = srccaps;
if (filter)
filtered_caps = gst_caps_intersect (srccaps, filter);
returned_caps = gst_caps_intersect (filtered_caps, template_caps);
gst_caps_unref (srccaps);
if (filter)
gst_caps_unref (filtered_caps);
if (had_current_caps)
gst_caps_unref (template_caps);
return returned_caps;
}
static void
gst_videoaggregator_update_qos (GstVideoAggregator * vagg, gdouble proportion,
GstClockTimeDiff diff, GstClockTime timestamp)
{
gboolean live;
GST_DEBUG_OBJECT (vagg,
"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));
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_videoaggregator_reset_qos (GstVideoAggregator * vagg)
{
gst_videoaggregator_update_qos (vagg, 0.5, 0, GST_CLOCK_TIME_NONE);
vagg->priv->qos_processed = vagg->priv->qos_dropped = 0;
}
static void
gst_videoaggregator_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_videoaggregator_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;
agg->segment.position = -1;
gst_videoaggregator_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_videoaggregator_fill_queues (GstVideoAggregator * vagg,
GstClockTime output_start_time, GstClockTime output_end_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_time
* and output_end_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_time) {
if (pad->buffer) {
GST_DEBUG_OBJECT (pad, "buffer duration is -1, start_time >= "
"output_end_time. Keeping previous buffer");
} else {
GST_DEBUG_OBJECT (pad, "buffer duration is -1, start_time >= "
"output_end_time. No previous buffer, need more data");
need_more_data = TRUE;
}
gst_buffer_unref (buf);
continue;
} else if (start_time < output_start_time) {
GST_DEBUG_OBJECT (pad, "buffer duration is -1, start_time < "
"output_start_time. Discarding old buffer");
gst_buffer_replace (&pad->buffer, buf);
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_time),
GST_TIME_ARGS (output_end_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_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 (&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_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_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_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_videoaggregator_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_videoaggregator_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_videoaggregator_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_videoaggregator_get_next_time (GstAggregator * agg)
{
if (agg->segment.position == -1)
return agg->segment.start;
else
return agg->segment.position;
}
static GstFlowReturn
gst_videoaggregator_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_videoaggregator_update_converters (vagg);
if (ret)
ret = gst_videoaggregator_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_videoaggregator_aggregate (GstAggregator * agg, gboolean timeout)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
GstClockTime output_start_time, output_end_time;
GstBuffer *outbuf = NULL;
GstFlowReturn flow_ret;
gint64 jitter;
GST_VIDEO_AGGREGATOR_LOCK (vagg);
flow_ret = gst_videoaggregator_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 = gst_videoaggregator_get_next_time (agg);
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)) + agg->segment.start;
if (agg->segment.stop != -1)
output_end_time = MIN (output_end_time, agg->segment.stop);
if (output_end_time == output_start_time) {
flow_ret = GST_FLOW_EOS;
} else {
flow_ret =
gst_videoaggregator_fill_queues (vagg, output_start_time,
output_end_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;
}
jitter = gst_videoaggregator_do_qos (vagg, output_start_time);
if (jitter <= 0) {
flow_ret = gst_videoaggregator_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++;
/* TODO: live */
msg =
gst_message_new_qos (GST_OBJECT_CAST (vagg), FALSE,
gst_segment_to_running_time (&agg->segment, GST_FORMAT_TIME,
output_start_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;
}
agg->segment.position = output_end_time;
vagg->priv->nframes++;
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);
}
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_videoaggregator_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_videoaggregator_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_videoaggregator_query_duration (vagg, query);
break;
default:
res =
GST_AGGREGATOR_CLASS (gst_videoaggregator_parent_class)->src_query
(agg, query);
break;
}
return res;
}
static gboolean
gst_videoaggregator_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_videoaggregator_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_videoaggregator_parent_class)->src_event (agg,
event);
}
static GstFlowReturn
gst_videoaggregator_sink_clip (GstAggregator * agg,
GstAggregatorPad * bpad, GstBuffer * buf, GstBuffer ** outbuf)
{
GstVideoAggregatorPad *pad = GST_VIDEO_AGGREGATOR_PAD (bpad);
GstClockTime start_time, end_time;
GstBuffer *pbuf;
start_time = GST_BUFFER_TIMESTAMP (buf);
if (start_time == -1) {
GST_WARNING_OBJECT (pad, "Timestamped buffers required!");
gst_buffer_unref (buf);
*outbuf = NULL;
return GST_FLOW_ERROR;
}
end_time = GST_BUFFER_DURATION (buf);
if (end_time == -1 && GST_VIDEO_INFO_FPS_N (&pad->info) != 0)
end_time =
gst_util_uint64_scale_int_round (GST_SECOND,
GST_VIDEO_INFO_FPS_D (&pad->info), GST_VIDEO_INFO_FPS_N (&pad->info));
if (end_time == -1) {
*outbuf = buf;
return GST_FLOW_OK;
}
GST_OBJECT_LOCK (bpad);
start_time = MAX (start_time, bpad->segment.start);
start_time =
gst_segment_to_running_time (&bpad->segment, GST_FORMAT_TIME, start_time);
end_time += GST_BUFFER_TIMESTAMP (buf);
if (bpad->segment.stop != -1)
end_time = MIN (end_time, bpad->segment.stop);
end_time =
gst_segment_to_running_time (&bpad->segment, GST_FORMAT_TIME, end_time);
/* Convert to the output segment rate */
if (ABS (agg->segment.rate) != 1.0) {
end_time *= ABS (agg->segment.rate);
}
pbuf = gst_aggregator_pad_get_buffer (bpad);
if (pbuf != NULL) {
gst_buffer_unref (pbuf);
if (end_time < pad->priv->end_time) {
gst_buffer_unref (buf);
*outbuf = NULL;
goto done;
}
}
*outbuf = buf;
done:
GST_OBJECT_UNLOCK (bpad);
return GST_FLOW_OK;
}
static GstFlowReturn
gst_videoaggregator_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_videoaggregator_reset_qos (vagg);
return GST_FLOW_OK;
}
static gboolean
gst_videoaggregator_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_videoaggregator_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_videoaggregator_reset_qos (vagg);
break;
}
default:
break;
}
if (event != NULL)
return GST_AGGREGATOR_CLASS (gst_videoaggregator_parent_class)->sink_event
(agg, bpad, event);
return ret;
}
static gboolean
gst_videoaggregator_start (GstAggregator * agg)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
gst_caps_replace (&vagg->priv->current_caps, NULL);
return TRUE;
}
static gboolean
gst_videoaggregator_stop (GstAggregator * agg)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg);
gst_videoaggregator_reset (vagg);
return TRUE;
}
/* GstElement vmethods */
static GstPad *
gst_videoaggregator_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_videoaggregator_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_videoaggregator_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_videoaggregator_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_videoaggregator_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_videoaggregator_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_videoaggregator_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",
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_videoaggregator_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_videoaggregator_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_videoaggregator_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_videoaggregator_parent_class)->sink_query
(agg, bpad, query);
break;
}
return ret;
}
/* GObject vmethods */
static void
gst_videoaggregator_finalize (GObject * o)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (o);
g_mutex_clear (&vagg->priv->lock);
G_OBJECT_CLASS (gst_videoaggregator_parent_class)->finalize (o);
}
static void
gst_videoaggregator_dispose (GObject * o)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (o);
gst_caps_replace (&vagg->priv->current_caps, NULL);
G_OBJECT_CLASS (gst_videoaggregator_parent_class)->dispose (o);
}
static void
gst_videoaggregator_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_videoaggregator_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_videoaggregator_class_init (GstVideoAggregatorClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
GstAggregatorClass *agg_class = (GstAggregatorClass *) klass;
GST_DEBUG_CATEGORY_INIT (gst_videoaggregator_debug, "videoaggregator", 0,
"base video aggregator");
g_type_class_add_private (klass, sizeof (GstVideoAggregatorPrivate));
gobject_class->finalize = gst_videoaggregator_finalize;
gobject_class->dispose = gst_videoaggregator_dispose;
gobject_class->get_property = gst_videoaggregator_get_property;
gobject_class->set_property = gst_videoaggregator_set_property;
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_videoaggregator_request_new_pad);
gstelement_class->release_pad =
GST_DEBUG_FUNCPTR (gst_videoaggregator_release_pad);
agg_class->sinkpads_type = GST_TYPE_VIDEO_AGGREGATOR_PAD;
agg_class->start = gst_videoaggregator_start;
agg_class->stop = gst_videoaggregator_stop;
agg_class->sink_query = gst_videoaggregator_sink_query;
agg_class->sink_event = gst_videoaggregator_sink_event;
agg_class->flush = gst_videoaggregator_flush;
agg_class->clip = gst_videoaggregator_sink_clip;
agg_class->aggregate = gst_videoaggregator_aggregate;
agg_class->src_event = gst_videoaggregator_src_event;
agg_class->src_query = gst_videoaggregator_src_query;
agg_class->get_next_time = gst_videoaggregator_get_next_time;
klass->find_best_format = gst_videoaggreagator_find_best_format;
klass->get_output_buffer = gst_videoaggregator_get_output_buffer;
/* Register the pad class */
g_type_class_ref (GST_TYPE_VIDEO_AGGREGATOR_PAD);
}
static void
gst_videoaggregator_init (GstVideoAggregator * vagg)
{
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 */
gst_videoaggregator_reset (vagg);
}
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