gstreamer/gst/playback/gstplaysinkvideoconvert.c

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/* GStreamer
* Copyright (C) <2011> Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstplaysinkvideoconvert.h"
#include <gst/pbutils/pbutils.h>
#include <gst/gst-i18n-plugin.h>
GST_DEBUG_CATEGORY_STATIC (gst_play_sink_video_convert_debug);
#define GST_CAT_DEFAULT gst_play_sink_video_convert_debug
#define parent_class gst_play_sink_video_convert_parent_class
G_DEFINE_TYPE (GstPlaySinkVideoConvert, gst_play_sink_video_convert,
GST_TYPE_BIN);
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static gboolean
is_raw_caps (GstCaps * caps)
{
gint i, n;
GstStructure *s;
const gchar *name;
n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
s = gst_caps_get_structure (caps, i);
name = gst_structure_get_name (s);
if (!g_str_has_prefix (name, "video/x-raw"))
return FALSE;
}
return TRUE;
}
static void
post_missing_element_message (GstPlaySinkVideoConvert * self,
const gchar * name)
{
GstMessage *msg;
msg = gst_missing_element_message_new (GST_ELEMENT_CAST (self), name);
gst_element_post_message (GST_ELEMENT_CAST (self), msg);
}
static GstProbeReturn
pad_blocked_cb (GstPad * pad, GstProbeType type, gpointer type_data,
gpointer user_data)
{
GstPlaySinkVideoConvert *self = user_data;
GstPad *peer;
GstCaps *caps;
gboolean raw;
GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
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GST_DEBUG_OBJECT (self, "Pad blocked");
/* There must be a peer at this point */
peer = gst_pad_get_peer (self->sinkpad);
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caps = gst_pad_get_current_caps (peer);
if (!caps)
caps = gst_pad_get_caps (peer, NULL);
gst_object_unref (peer);
raw = is_raw_caps (caps);
GST_DEBUG_OBJECT (self, "Caps %" GST_PTR_FORMAT " are raw: %d", caps, raw);
gst_caps_unref (caps);
if (raw == self->raw)
goto unblock;
self->raw = raw;
if (raw) {
GstBin *bin = GST_BIN_CAST (self);
GstElement *head = NULL, *prev = NULL;
GstPad *pad;
GST_DEBUG_OBJECT (self, "Creating raw conversion pipeline");
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->sinkpad), NULL);
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
self->conv = gst_element_factory_make (COLORSPACE, "conv");
if (self->conv == NULL) {
post_missing_element_message (self, COLORSPACE);
GST_ELEMENT_WARNING (self, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
COLORSPACE), ("video rendering might fail"));
} else {
gst_bin_add (bin, self->conv);
gst_element_sync_state_with_parent (self->conv);
prev = head = self->conv;
}
self->scale = gst_element_factory_make ("videoscale", "scale");
if (self->scale == NULL) {
post_missing_element_message (self, "videoscale");
GST_ELEMENT_WARNING (self, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"videoscale"), ("possibly a liboil version mismatch?"));
} else {
/* Add black borders if necessary to keep the DAR */
g_object_set (self->scale, "add-borders", TRUE, NULL);
gst_bin_add (bin, self->scale);
gst_element_sync_state_with_parent (self->scale);
if (prev) {
if (!gst_element_link_pads_full (prev, "src", self->scale, "sink",
GST_PAD_LINK_CHECK_TEMPLATE_CAPS))
goto link_failed;
} else {
head = self->scale;
}
prev = self->scale;
}
if (head) {
pad = gst_element_get_static_pad (head, "sink");
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->sinkpad), pad);
gst_object_unref (pad);
}
if (prev) {
pad = gst_element_get_static_pad (prev, "src");
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), pad);
gst_object_unref (pad);
}
if (!head && !prev) {
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad),
self->sink_proxypad);
}
GST_DEBUG_OBJECT (self, "Raw conversion pipeline created");
} else {
GstBin *bin = GST_BIN_CAST (self);
GST_DEBUG_OBJECT (self, "Removing raw conversion pipeline");
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->sinkpad), NULL);
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
if (self->conv) {
gst_element_set_state (self->conv, GST_STATE_NULL);
gst_bin_remove (bin, self->conv);
self->conv = NULL;
}
if (self->scale) {
gst_element_set_state (self->scale, GST_STATE_NULL);
gst_bin_remove (bin, self->scale);
self->scale = NULL;
}
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad),
self->sink_proxypad);
GST_DEBUG_OBJECT (self, "Raw conversion pipeline removed");
}
unblock:
self->sink_proxypad_block_id = 0;
GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
return GST_PROBE_REMOVE;
link_failed:
{
GST_ELEMENT_ERROR (self, CORE, PAD,
(NULL), ("Failed to configure the video converter."));
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad),
self->sink_proxypad);
self->sink_proxypad_block_id = 0;
GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
return GST_PROBE_REMOVE;
}
}
static void
block_proxypad (GstPlaySinkVideoConvert * self)
{
if (self->sink_proxypad_block_id == 0) {
self->sink_proxypad_block_id =
gst_pad_add_probe (self->sink_proxypad, GST_PROBE_TYPE_BLOCK,
pad_blocked_cb, gst_object_ref (self),
(GDestroyNotify) gst_object_unref);
}
}
static void
unblock_proxypad (GstPlaySinkVideoConvert * self)
{
if (self->sink_proxypad_block_id != 0) {
gst_pad_remove_probe (self->sink_proxypad, self->sink_proxypad_block_id);
self->sink_proxypad_block_id = 0;
}
}
static gboolean
gst_play_sink_video_convert_sink_setcaps (GstPlaySinkVideoConvert * self,
GstCaps * caps)
{
GstStructure *s;
const gchar *name;
gboolean reconfigure = FALSE;
GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
s = gst_caps_get_structure (caps, 0);
name = gst_structure_get_name (s);
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if (g_str_has_prefix (name, "video/x-raw")) {
if (!self->raw && !gst_pad_is_blocked (self->sink_proxypad)) {
GST_DEBUG_OBJECT (self, "Changing caps from non-raw to raw");
reconfigure = TRUE;
block_proxypad (self);
}
} else {
if (self->raw && !gst_pad_is_blocked (self->sink_proxypad)) {
GST_DEBUG_OBJECT (self, "Changing caps from raw to non-raw");
reconfigure = TRUE;
block_proxypad (self);
}
}
/* Otherwise the setcaps below fails */
if (reconfigure) {
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->sinkpad), NULL);
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
}
GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
GST_DEBUG_OBJECT (self, "Setting sink caps %" GST_PTR_FORMAT, caps);
return TRUE;
}
static gboolean
gst_play_sink_video_convert_sink_event (GstPad * pad, GstEvent * event)
{
GstPlaySinkVideoConvert *self =
GST_PLAY_SINK_VIDEO_CONVERT (gst_pad_get_parent (pad));
gboolean ret;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
ret = gst_play_sink_video_convert_sink_setcaps (self, caps);
break;
}
default:
break;
}
ret = gst_proxy_pad_event_default (pad, gst_event_ref (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT:
GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
GST_DEBUG_OBJECT (self, "Segment before %" GST_SEGMENT_FORMAT,
&self->segment);
gst_event_copy_segment (event, &self->segment);
GST_DEBUG_OBJECT (self, "Segment after %" GST_SEGMENT_FORMAT,
&self->segment);
GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
break;
case GST_EVENT_FLUSH_STOP:
GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
GST_DEBUG_OBJECT (self, "Resetting segment");
gst_segment_init (&self->segment, GST_FORMAT_UNDEFINED);
GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
break;
default:
break;
}
gst_event_unref (event);
gst_object_unref (self);
return ret;
}
static GstCaps *
gst_play_sink_video_convert_getcaps (GstPad * pad, GstCaps * filter)
{
GstPlaySinkVideoConvert *self =
GST_PLAY_SINK_VIDEO_CONVERT (gst_pad_get_parent (pad));
GstCaps *ret;
GstPad *otherpad, *peer;
GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
if (pad == self->srcpad)
otherpad = gst_object_ref (self->sinkpad);
else
otherpad = gst_object_ref (self->srcpad);
GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
peer = gst_pad_get_peer (otherpad);
if (peer) {
ret = gst_pad_get_caps (peer, filter);
gst_object_unref (peer);
} else {
ret = (filter ? gst_caps_ref (filter) : gst_caps_new_any ());
}
gst_object_unref (otherpad);
gst_object_unref (self);
return ret;
}
static void
gst_play_sink_video_convert_finalize (GObject * object)
{
GstPlaySinkVideoConvert *self = GST_PLAY_SINK_VIDEO_CONVERT_CAST (object);
gst_object_unref (self->sink_proxypad);
g_mutex_free (self->lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstStateChangeReturn
gst_play_sink_video_convert_change_state (GstElement * element,
GstStateChange transition)
{
GstStateChangeReturn ret;
GstPlaySinkVideoConvert *self = GST_PLAY_SINK_VIDEO_CONVERT_CAST (element);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
unblock_proxypad (self);
GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
gst_segment_init (&self->segment, GST_FORMAT_UNDEFINED);
if (self->conv) {
gst_element_set_state (self->conv, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (self), self->conv);
self->conv = NULL;
}
if (self->scale) {
gst_element_set_state (self->scale, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (self), self->scale);
self->scale = NULL;
}
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad),
self->sink_proxypad);
self->raw = FALSE;
GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
if (!gst_pad_is_blocked (self->sink_proxypad))
block_proxypad (self);
GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
default:
break;
}
return ret;
}
static void
gst_play_sink_video_convert_class_init (GstPlaySinkVideoConvertClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GST_DEBUG_CATEGORY_INIT (gst_play_sink_video_convert_debug,
"playsinkvideoconvert", 0, "play bin");
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->finalize = gst_play_sink_video_convert_finalize;
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&srctemplate));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&sinktemplate));
gst_element_class_set_details_simple (gstelement_class,
"Player Sink Video Converter", "Video/Bin/Converter",
"Convenience bin for video conversion",
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_play_sink_video_convert_change_state);
}
static void
gst_play_sink_video_convert_init (GstPlaySinkVideoConvert * self)
{
GstPadTemplate *templ;
self->lock = g_mutex_new ();
gst_segment_init (&self->segment, GST_FORMAT_UNDEFINED);
templ = gst_static_pad_template_get (&sinktemplate);
self->sinkpad = gst_ghost_pad_new_no_target_from_template ("sink", templ);
gst_pad_set_event_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_play_sink_video_convert_sink_event));
gst_pad_set_getcaps_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_play_sink_video_convert_getcaps));
self->sink_proxypad =
GST_PAD_CAST (gst_proxy_pad_get_internal (GST_PROXY_PAD (self->sinkpad)));
gst_element_add_pad (GST_ELEMENT_CAST (self), self->sinkpad);
gst_object_unref (templ);
templ = gst_static_pad_template_get (&srctemplate);
self->srcpad = gst_ghost_pad_new_no_target_from_template ("src", templ);
gst_pad_set_getcaps_function (self->srcpad,
GST_DEBUG_FUNCPTR (gst_play_sink_video_convert_getcaps));
gst_element_add_pad (GST_ELEMENT_CAST (self), self->srcpad);
gst_object_unref (templ);
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad),
self->sink_proxypad);
}