gstreamer/gst/playback/gstplaysinkconvertbin.c

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/* GStreamer
* Copyright (C) <2011> Sebastian Dröge <sebastian.droege@collabora.co.uk>
* Copyright (C) <2011> Vincent Penquerch <vincent.penquerch@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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstplaysinkconvertbin.h"
#include <gst/pbutils/pbutils.h>
#include <gst/gst-i18n-plugin.h>
GST_DEBUG_CATEGORY_STATIC (gst_play_sink_convert_bin_debug);
#define GST_CAT_DEFAULT gst_play_sink_convert_bin_debug
#define parent_class gst_play_sink_convert_bin_parent_class
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static gboolean gst_play_sink_convert_bin_sink_setcaps (GstPlaySinkConvertBin *
self, GstCaps * caps);
G_DEFINE_TYPE (GstPlaySinkConvertBin, gst_play_sink_convert_bin, 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, gboolean audio)
{
gint i, n;
GstStructure *s;
const gchar *name;
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const gchar *prefix = audio ? "audio/x-raw" : "video/x-raw";
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_equal (name, prefix))
return TRUE;
}
return FALSE;
}
static void
gst_play_sink_convert_bin_post_missing_element_message (GstPlaySinkConvertBin *
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);
}
void
gst_play_sink_convert_bin_add_conversion_element (GstPlaySinkConvertBin * self,
GstElement * el)
{
self->conversion_elements = g_list_append (self->conversion_elements, el);
gst_bin_add (GST_BIN (self), gst_object_ref (el));
}
GstElement *
gst_play_sink_convert_bin_add_conversion_element_factory (GstPlaySinkConvertBin
* self, const char *factory, const char *name)
{
GstElement *el;
el = gst_element_factory_make (factory, name);
if (el == NULL) {
gst_play_sink_convert_bin_post_missing_element_message (self, factory);
GST_ELEMENT_WARNING (self, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
factory),
(self->audio ? "audio rendering might fail" :
"video rendering might fail"));
} else {
gst_play_sink_convert_bin_add_conversion_element (self, el);
}
return el;
}
void
gst_play_sink_convert_bin_add_identity (GstPlaySinkConvertBin * self)
{
if (self->identity)
return;
self->identity = gst_element_factory_make ("identity", "identity");
if (self->identity == NULL) {
gst_play_sink_convert_bin_post_missing_element_message (self, "identity");
GST_ELEMENT_WARNING (self, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"identity"), (self->audio ?
"audio rendering might fail" : "video rendering might fail")
);
} else {
g_object_set (self->identity, "silent", TRUE, "signal-handoffs", FALSE,
NULL);
gst_bin_add (GST_BIN_CAST (self), self->identity);
}
}
static void
gst_play_sink_convert_bin_set_targets (GstPlaySinkConvertBin * self,
gboolean passthrough)
{
GstPad *pad;
GstElement *head, *tail;
GST_DEBUG_OBJECT (self, "Setting pad targets with passthrough %d",
passthrough);
if (self->conversion_elements == NULL || passthrough) {
GST_DEBUG_OBJECT (self, "no conversion elements, using identity (%p) as "
"head/tail", self->identity);
if (!passthrough) {
GST_WARNING_OBJECT (self,
"Doing passthrough as no converter elements were added");
}
head = tail = self->identity;
} else {
head = GST_ELEMENT (g_list_first (self->conversion_elements)->data);
tail = GST_ELEMENT (g_list_last (self->conversion_elements)->data);
GST_DEBUG_OBJECT (self, "conversion elements in use, picking "
"head:%s and tail:%s", GST_OBJECT_NAME (head), GST_OBJECT_NAME (tail));
}
g_return_if_fail (head != NULL);
g_return_if_fail (tail != NULL);
pad = gst_element_get_static_pad (head, "sink");
GST_DEBUG_OBJECT (self, "Ghosting bin sink pad to %" GST_PTR_FORMAT, pad);
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->sinkpad), pad);
gst_object_unref (pad);
pad = gst_element_get_static_pad (tail, "src");
GST_DEBUG_OBJECT (self, "Ghosting bin src pad to %" GST_PTR_FORMAT, pad);
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), pad);
gst_object_unref (pad);
}
static void
gst_play_sink_convert_bin_remove_element (GstElement * element,
GstPlaySinkConvertBin * self)
{
gst_element_set_state (element, GST_STATE_NULL);
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gst_object_unref (element);
gst_bin_remove (GST_BIN_CAST (self), element);
}
static void
gst_play_sink_convert_bin_on_element_added (GstElement * element,
GstPlaySinkConvertBin * self)
{
gst_element_sync_state_with_parent (element);
}
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static GstPadProbeReturn
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pad_blocked_cb (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
{
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GstPlaySinkConvertBin *self = user_data;
GstPad *peer;
GstCaps *caps;
gboolean raw;
GST_PLAY_SINK_CONVERT_BIN_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_query_caps (peer, NULL);
gst_object_unref (peer);
raw = is_raw_caps (caps, self->audio);
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;
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 (raw) {
GST_DEBUG_OBJECT (self, "Switching to raw conversion pipeline");
if (self->conversion_elements)
g_list_foreach (self->conversion_elements,
(GFunc) gst_play_sink_convert_bin_on_element_added, self);
} else {
GST_DEBUG_OBJECT (self, "Switch to passthrough pipeline");
gst_play_sink_convert_bin_on_element_added (self->identity, self);
}
gst_play_sink_convert_bin_set_targets (self, !raw);
unblock:
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self->sink_proxypad_block_id = 0;
GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
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return GST_PAD_PROBE_REMOVE;
}
static gboolean
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gst_play_sink_convert_bin_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event)
{
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GstPlaySinkConvertBin *self = GST_PLAY_SINK_CONVERT_BIN (parent);
gboolean ret;
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switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
ret = gst_play_sink_convert_bin_sink_setcaps (self, caps);
break;
}
default:
break;
}
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ret = gst_pad_event_default (pad, parent, gst_event_ref (event));
gst_event_unref (event);
return ret;
}
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static void
block_proxypad (GstPlaySinkConvertBin * self)
{
if (self->sink_proxypad_block_id == 0) {
self->sink_proxypad_block_id =
gst_pad_add_probe (self->sink_proxypad,
GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM, pad_blocked_cb, self, NULL);
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}
}
static void
unblock_proxypad (GstPlaySinkConvertBin * 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
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gst_play_sink_convert_bin_sink_setcaps (GstPlaySinkConvertBin * self,
GstCaps * caps)
{
GstStructure *s;
const gchar *name;
gboolean reconfigure = FALSE;
gboolean raw;
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GST_DEBUG_OBJECT (self, "setcaps");
GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
s = gst_caps_get_structure (caps, 0);
name = gst_structure_get_name (s);
if (self->audio) {
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raw = g_str_equal (name, "audio/x-raw");
} else {
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raw = g_str_equal (name, "video/x-raw");
}
GST_DEBUG_OBJECT (self, "raw %d, self->raw %d, blocked %d",
raw, self->raw, gst_pad_is_blocked (self->sink_proxypad));
if (raw) {
if (!gst_pad_is_blocked (self->sink_proxypad)) {
GstPad *target = gst_ghost_pad_get_target (GST_GHOST_PAD (self->sinkpad));
if (!self->raw || (target && !gst_pad_query_accept_caps (target, caps))) {
if (!self->raw)
GST_DEBUG_OBJECT (self, "Changing caps from non-raw to raw");
else
GST_DEBUG_OBJECT (self, "Changing caps in an incompatible way");
reconfigure = TRUE;
block_proxypad (self);
}
if (target)
gst_object_unref (target);
}
} else {
if (self->raw && !gst_pad_is_blocked (self->sink_proxypad)) {
GST_DEBUG_OBJECT (self, "Changing caps from raw to non-raw");
reconfigure = TRUE;
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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_CONVERT_BIN_UNLOCK (self);
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GST_DEBUG_OBJECT (self, "Setting sink caps %" GST_PTR_FORMAT, caps);
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return TRUE;
}
static GstCaps *
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gst_play_sink_convert_bin_getcaps (GstPad * pad, GstCaps * filter)
{
GstPlaySinkConvertBin *self =
GST_PLAY_SINK_CONVERT_BIN (gst_pad_get_parent (pad));
GstCaps *ret;
GstPad *otherpad, *peer;
GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
if (pad == self->srcpad) {
otherpad = self->sinkpad;
} else if (pad == self->sinkpad) {
otherpad = self->srcpad;
} else {
GST_ERROR_OBJECT (pad, "Not one of our pads");
otherpad = NULL;
}
if (otherpad) {
peer = gst_pad_get_peer (otherpad);
if (peer) {
GstCaps *peer_caps;
GstCaps *downstream_filter = NULL;
/* Add all the caps that we can convert to to the filter caps,
* otherwise downstream might just return EMPTY caps because
* it doesn't handle the filter caps but we could still convert
* to these caps */
if (filter) {
downstream_filter = gst_caps_copy (filter);
downstream_filter =
gst_caps_merge (downstream_filter,
gst_caps_ref (self->converter_caps));
}
peer_caps = gst_pad_query_caps (peer, downstream_filter);
if (downstream_filter)
gst_caps_unref (downstream_filter);
gst_object_unref (peer);
if (self->converter_caps && is_raw_caps (peer_caps, self->audio)) {
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ret = gst_caps_merge (peer_caps, gst_caps_ref (self->converter_caps));
} else {
ret = peer_caps;
}
} else {
ret = gst_caps_ref (self->converter_caps);
}
} else {
ret = gst_caps_new_any ();
}
GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
gst_object_unref (self);
if (filter) {
GstCaps *intersection =
gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (ret);
ret = intersection;
}
GST_DEBUG_OBJECT (pad, "Returning caps %" GST_PTR_FORMAT, ret);
return ret;
}
static gboolean
gst_play_sink_convert_bin_acceptcaps (GstPad * pad, GstCaps * caps)
{
GstCaps *allowed_caps;
gboolean ret;
allowed_caps = gst_pad_query_caps (pad, NULL);
ret = gst_caps_is_subset (caps, allowed_caps);
gst_caps_unref (allowed_caps);
return ret;
}
static gboolean
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gst_play_sink_convert_bin_query (GstPad * pad, GstObject * parent,
GstQuery * query)
{
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_ACCEPT_CAPS:
{
GstCaps *caps;
gst_query_parse_accept_caps (query, &caps);
gst_query_set_accept_caps_result (query,
gst_play_sink_convert_bin_acceptcaps (pad, caps));
res = TRUE;
break;
}
case GST_QUERY_CAPS:
{
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
caps = gst_play_sink_convert_bin_getcaps (pad, filter);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
res = TRUE;
break;
}
default:
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res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
void
gst_play_sink_convert_bin_remove_elements (GstPlaySinkConvertBin * self)
{
if (self->conversion_elements) {
g_list_foreach (self->conversion_elements,
(GFunc) gst_play_sink_convert_bin_remove_element, self);
g_list_free (self->conversion_elements);
self->conversion_elements = NULL;
}
if (self->converter_caps) {
gst_caps_unref (self->converter_caps);
self->converter_caps = NULL;
}
}
static void
gst_play_sink_convert_bin_dispose (GObject * object)
{
GstPlaySinkConvertBin *self = GST_PLAY_SINK_CONVERT_BIN_CAST (object);
gst_play_sink_convert_bin_remove_elements (self);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_play_sink_convert_bin_finalize (GObject * object)
{
GstPlaySinkConvertBin *self = GST_PLAY_SINK_CONVERT_BIN_CAST (object);
gst_object_unref (self->sink_proxypad);
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g_mutex_clear (&self->lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
void
gst_play_sink_convert_bin_cache_converter_caps (GstPlaySinkConvertBin * self)
{
GstElement *head;
GstPad *pad;
if (self->converter_caps) {
gst_caps_unref (self->converter_caps);
self->converter_caps = NULL;
}
if (!self->conversion_elements) {
GST_INFO_OBJECT (self, "No conversion elements");
return;
}
head = GST_ELEMENT (g_list_first (self->conversion_elements)->data);
pad = gst_element_get_static_pad (head, "sink");
if (!pad) {
GST_WARNING_OBJECT (self, "No sink pad found");
return;
}
self->converter_caps = gst_pad_query_caps (pad, NULL);
GST_INFO_OBJECT (self, "Converter caps: %" GST_PTR_FORMAT,
self->converter_caps);
gst_object_unref (pad);
}
static GstStateChangeReturn
gst_play_sink_convert_bin_change_state (GstElement * element,
GstStateChange transition)
{
GstStateChangeReturn ret;
GstPlaySinkConvertBin *self = GST_PLAY_SINK_CONVERT_BIN_CAST (element);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
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unblock_proxypad (self);
GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
gst_play_sink_convert_bin_set_targets (self, TRUE);
self->raw = FALSE;
GST_PLAY_SINK_CONVERT_BIN_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_CONVERT_BIN_LOCK (self);
gst_play_sink_convert_bin_set_targets (self, TRUE);
self->raw = FALSE;
GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
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unblock_proxypad (self);
GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
break;
default:
break;
}
return ret;
}
static void
gst_play_sink_convert_bin_class_init (GstPlaySinkConvertBinClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GST_DEBUG_CATEGORY_INIT (gst_play_sink_convert_bin_debug,
"playsinkconvertbin", 0, "play bin");
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->dispose = gst_play_sink_convert_bin_dispose;
gobject_class->finalize = gst_play_sink_convert_bin_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_static_metadata (gstelement_class,
"Player Sink Converter Bin", "Bin/Converter",
"Convenience bin for audio/video conversion",
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_play_sink_convert_bin_change_state);
}
static void
gst_play_sink_convert_bin_init (GstPlaySinkConvertBin * self)
{
GstPadTemplate *templ;
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g_mutex_init (&self->lock);
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_convert_bin_sink_event));
gst_pad_set_query_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_play_sink_convert_bin_query));
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_query_function (self->srcpad,
GST_DEBUG_FUNCPTR (gst_play_sink_convert_bin_query));
gst_element_add_pad (GST_ELEMENT_CAST (self), self->srcpad);
gst_object_unref (templ);
gst_play_sink_convert_bin_add_identity (self);
}