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gstreamer/gst/playback/gstplaysink.c
Wim Taymans cd1fed3345 gst/playback/gstplaysink.*: Add methods to get audio/video/vis elements. 
Original commit message from CVS:
* gst/playback/gstplaysink.c: (gst_play_sink_class_init),
(gst_play_sink_init), (gst_play_sink_dispose),
(gst_play_sink_set_video_sink), (gst_play_sink_get_video_sink),
(gst_play_sink_set_audio_sink), (gst_play_sink_get_audio_sink),
(gst_play_sink_vis_unblocked), (gst_play_sink_vis_blocked),
(gst_play_sink_set_vis_plugin), (gst_play_sink_get_vis_plugin),
(gst_play_sink_set_volume), (gst_play_sink_get_volume),
(gst_play_sink_set_mute), (gen_video_chain), (gen_text_chain),
(gen_audio_chain), (gen_vis_chain), (gst_play_sink_reconfigure),
(gst_play_sink_set_font_desc), (gst_play_sink_get_font_desc),
(gst_play_sink_send_event_to_sink), (gst_play_sink_change_state):
* gst/playback/gstplaysink.h:
Add methods to get audio/video/vis elements.
Add methods to set the font description for the overlay.
Remove properties, we're using this element with its methods only.
Add support for subtitles.
Rearrange the locking a bit to not use the object lock for protecting
the pipeline construction.
Try to use the volume and mute property on the sink when its available.
Implement the mute option with volume when the sink does not have a mute
property.
Only add volume element when the sink has no volume property.
Only do visualisations with raw audio pads.
2008-03-24 12:15:26 +00:00

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/* GStreamer
* Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com>
*
* 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 <string.h>
#include <gst/gst.h>
#include <gst/gst-i18n-plugin.h>
#include <gst/pbutils/pbutils.h>
#include "gstplaysink.h"
GST_DEBUG_CATEGORY_STATIC (gst_play_sink_debug);
#define GST_CAT_DEFAULT gst_play_sink_debug
#define VOLUME_MAX_DOUBLE 10.0
#define GST_PLAY_CHAIN(c) (GstPlayChain *)(c)
/* holds the common data fields for the audio and video pipelines. We keep them
* in a structure to more easily have all the info available. */
typedef struct
{
GstPlaySink *playsink;
GstElement *bin;
gboolean added;
gboolean activated;
} GstPlayChain;
typedef struct
{
GstPlayChain chain;
GstPad *sinkpad;
GstElement *queue;
GstElement *conv;
GstElement *resample;
GstElement *volume; /* element with the volume property */
GstElement *mute; /* element with the mute property */
GstElement *sink;
} GstPlayAudioChain;
typedef struct
{
GstPlayChain chain;
GstPad *sinkpad;
GstElement *queue;
GstElement *conv;
GstElement *scale;
GstElement *sink;
gboolean async;
} GstPlayVideoChain;
typedef struct
{
GstPlayChain chain;
GstPad *sinkpad;
GstElement *queue;
GstElement *conv;
GstElement *resample;
GstPad *blockpad; /* srcpad of resample, used for switching the vis */
GstPad *vissinkpad; /* visualisation sinkpad, */
GstElement *vis;
GstPad *vissrcpad; /* visualisation srcpad, */
GstPad *srcpad; /* outgoing srcpad, used to connect to the next
* chain */
} GstPlayVisChain;
typedef struct
{
GstPlayChain chain;
GstPad *sinkpad;
GstElement *conv;
GstElement *overlay;
GstPad *videosinkpad;
GstPad *textsinkpad;
GstPad *srcpad; /* outgoing srcpad, used to connect to the next
* chain */
} GstPlayTextChain;
#define GST_PLAY_SINK_GET_LOCK(playsink) (((GstPlaySink *)playsink)->lock)
#define GST_PLAY_SINK_LOCK(playsink) g_mutex_lock (GST_PLAY_SINK_GET_LOCK (playsink))
#define GST_PLAY_SINK_UNLOCK(playsink) g_mutex_unlock (GST_PLAY_SINK_GET_LOCK (playsink))
struct _GstPlaySink
{
GstBin bin;
GMutex *lock;
GstPlayFlags flags;
GstPlayAudioChain *audiochain;
GstPlayVideoChain *videochain;
GstPlayVisChain *vischain;
GstPlayTextChain *textchain;
GstPad *audio_pad;
gboolean audio_pad_raw;
GstElement *audio_tee;
GstPad *audio_tee_sink;
GstPad *audio_tee_asrc;
GstPad *audio_tee_vissrc;
GstPad *video_pad;
gboolean video_pad_raw;
GstPad *text_pad;
/* properties */
GstElement *audio_sink;
GstElement *video_sink;
GstElement *visualisation;
gfloat volume;
gboolean mute;
gchar *font_desc; /* font description */
guint connection_speed; /* connection speed in bits/sec (0 = unknown) */
};
struct _GstPlaySinkClass
{
GstBinClass parent_class;
};
/* props */
enum
{
PROP_0,
PROP_AUDIO_SINK,
PROP_VIDEO_SINK,
PROP_VIS_PLUGIN,
PROP_VOLUME,
PROP_FRAME,
PROP_FONT_DESC,
PROP_LAST
};
/* signals */
enum
{
LAST_SIGNAL
};
static void gst_play_sink_class_init (GstPlaySinkClass * klass);
static void gst_play_sink_init (GstPlaySink * playsink);
static void gst_play_sink_dispose (GObject * object);
static void gst_play_sink_finalize (GObject * object);
static gboolean gst_play_sink_send_event (GstElement * element,
GstEvent * event);
static GstStateChangeReturn gst_play_sink_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class;
/* static guint gst_play_sink_signals[LAST_SIGNAL] = { 0 }; */
static const GstElementDetails gst_play_sink_details =
GST_ELEMENT_DETAILS ("Player Sink",
"Generic/Bin/Player",
"Autoplug and play media from an uri",
"Wim Taymans <wim.taymans@gmail.com>");
GType
gst_play_sink_get_type (void)
{
static GType gst_play_sink_type = 0;
if (!gst_play_sink_type) {
static const GTypeInfo gst_play_sink_info = {
sizeof (GstPlaySinkClass),
NULL,
NULL,
(GClassInitFunc) gst_play_sink_class_init,
NULL,
NULL,
sizeof (GstPlaySink),
0,
(GInstanceInitFunc) gst_play_sink_init,
NULL
};
gst_play_sink_type = g_type_register_static (GST_TYPE_BIN,
"GstPlaySink", &gst_play_sink_info, 0);
}
return gst_play_sink_type;
}
static void
gst_play_sink_class_init (GstPlaySinkClass * klass)
{
GObjectClass *gobject_klass;
GstElementClass *gstelement_klass;
GstBinClass *gstbin_klass;
gobject_klass = (GObjectClass *) klass;
gstelement_klass = (GstElementClass *) klass;
gstbin_klass = (GstBinClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_klass->dispose = GST_DEBUG_FUNCPTR (gst_play_sink_dispose);
gobject_klass->finalize = GST_DEBUG_FUNCPTR (gst_play_sink_finalize);
gst_element_class_set_details (gstelement_klass, &gst_play_sink_details);
gstelement_klass->change_state =
GST_DEBUG_FUNCPTR (gst_play_sink_change_state);
gstelement_klass->send_event = GST_DEBUG_FUNCPTR (gst_play_sink_send_event);
GST_DEBUG_CATEGORY_INIT (gst_play_sink_debug, "playsink", 0, "play bin");
}
static void
gst_play_sink_init (GstPlaySink * playsink)
{
/* init groups */
playsink->video_sink = NULL;
playsink->audio_sink = NULL;
playsink->visualisation = NULL;
playsink->volume = 1.0;
playsink->font_desc = NULL;
playsink->flags = GST_PLAY_FLAG_SOFT_VOLUME;
playsink->lock = g_mutex_new ();
}
static void
gst_play_sink_dispose (GObject * object)
{
GstPlaySink *playsink;
playsink = GST_PLAY_SINK (object);
if (playsink->audio_sink != NULL) {
gst_element_set_state (playsink->audio_sink, GST_STATE_NULL);
gst_object_unref (playsink->audio_sink);
playsink->audio_sink = NULL;
}
if (playsink->video_sink != NULL) {
gst_element_set_state (playsink->video_sink, GST_STATE_NULL);
gst_object_unref (playsink->video_sink);
playsink->video_sink = NULL;
}
if (playsink->visualisation != NULL) {
gst_element_set_state (playsink->visualisation, GST_STATE_NULL);
gst_object_unref (playsink->visualisation);
playsink->visualisation = NULL;
}
g_free (playsink->font_desc);
playsink->font_desc = NULL;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_play_sink_finalize (GObject * object)
{
GstPlaySink *playsink;
playsink = GST_PLAY_SINK (object);
g_mutex_free (playsink->lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
void
gst_play_sink_set_video_sink (GstPlaySink * playsink, GstElement * sink)
{
GST_PLAY_SINK_LOCK (playsink);
if (playsink->video_sink)
gst_object_unref (playsink->video_sink);
if (sink) {
gst_object_ref (sink);
gst_object_sink (sink);
}
playsink->video_sink = sink;
GST_PLAY_SINK_UNLOCK (playsink);
}
GstElement *
gst_play_sink_get_video_sink (GstPlaySink * playsink)
{
GstElement *result = NULL;
GstPlayVideoChain *chain;
GST_PLAY_SINK_LOCK (playsink);
if ((chain = (GstPlayVideoChain *) playsink->videochain)) {
/* we have an active chain, get the sink */
if (chain->sink)
result = gst_object_ref (chain->sink);
}
/* nothing found, return last configured sink */
if (result == NULL && playsink->video_sink)
result = gst_object_ref (playsink->video_sink);
GST_PLAY_SINK_UNLOCK (playsink);
return result;
}
void
gst_play_sink_set_audio_sink (GstPlaySink * playsink, GstElement * sink)
{
GST_PLAY_SINK_LOCK (playsink);
if (playsink->audio_sink)
gst_object_unref (playsink->audio_sink);
if (sink) {
gst_object_ref (sink);
gst_object_sink (sink);
}
playsink->audio_sink = sink;
GST_PLAY_SINK_UNLOCK (playsink);
}
GstElement *
gst_play_sink_get_audio_sink (GstPlaySink * playsink)
{
GstElement *result = NULL;
GstPlayAudioChain *chain;
GST_PLAY_SINK_LOCK (playsink);
if ((chain = (GstPlayAudioChain *) playsink->audiochain)) {
/* we have an active chain, get the sink */
if (chain->sink)
result = gst_object_ref (chain->sink);
}
/* nothing found, return last configured sink */
if (result == NULL && playsink->audio_sink)
result = gst_object_ref (playsink->audio_sink);
GST_PLAY_SINK_UNLOCK (playsink);
return result;
}
static void
gst_play_sink_vis_unblocked (GstPad * tee_pad, gboolean blocked,
gpointer user_data)
{
GstPlaySink *playsink;
playsink = GST_PLAY_SINK (user_data);
/* nothing to do here, we need a dummy callback here to make the async call
* non-blocking. */
GST_DEBUG_OBJECT (playsink, "vis pad unblocked");
}
static void
gst_play_sink_vis_blocked (GstPad * tee_pad, gboolean blocked,
gpointer user_data)
{
GstPlaySink *playsink;
GstPlayVisChain *chain;
playsink = GST_PLAY_SINK (user_data);
GST_PLAY_SINK_LOCK (playsink);
GST_DEBUG_OBJECT (playsink, "vis pad blocked");
/* now try to change the plugin in the running vis chain */
if (!(chain = (GstPlayVisChain *) playsink->vischain))
goto done;
/* unlink the old plugin and unghost the pad */
gst_pad_unlink (chain->blockpad, chain->vissinkpad);
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (chain->srcpad), NULL);
/* set the old plugin to NULL and remove */
gst_element_set_state (chain->vis, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (chain->chain.bin), chain->vis);
/* add new plugin and set state to playing */
chain->vis = gst_object_ref (playsink->visualisation);
gst_bin_add (GST_BIN_CAST (chain->chain.bin), chain->vis);
gst_element_set_state (chain->vis, GST_STATE_PLAYING);
/* get pads */
chain->vissinkpad = gst_element_get_pad (chain->vis, "sink");
chain->vissrcpad = gst_element_get_pad (chain->vis, "src");
/* link pads */
gst_pad_link (chain->blockpad, chain->vissinkpad);
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (chain->srcpad),
chain->vissrcpad);
done:
/* Unblock the pad */
gst_pad_set_blocked_async (tee_pad, FALSE, gst_play_sink_vis_unblocked,
playsink);
GST_PLAY_SINK_UNLOCK (playsink);
}
void
gst_play_sink_set_vis_plugin (GstPlaySink * playsink, GstElement * vis)
{
GstPlayVisChain *chain;
/* setting NULL means creating the default vis plugin */
if (vis == NULL)
vis = gst_element_factory_make ("goom", "vis");
/* simply return if we don't have a vis plugin here */
if (vis == NULL)
return;
GST_PLAY_SINK_LOCK (playsink);
/* first store the new vis */
if (playsink->visualisation)
gst_object_unref (playsink->visualisation);
playsink->visualisation = gst_object_ref (vis);
/* now try to change the plugin in the running vis chain, if we have no chain,
* we don't bother, any future vis chain will be created with the new vis
* plugin. */
if (!(chain = (GstPlayVisChain *) playsink->vischain))
goto done;
/* block the pad, the next time the callback is called we can change the
* visualisation. It's possible that this never happens or that the pad was
* already blocked. */
GST_DEBUG_OBJECT (playsink, "blocking vis pad");
gst_pad_set_blocked_async (chain->blockpad, TRUE, gst_play_sink_vis_blocked,
playsink);
done:
GST_PLAY_SINK_UNLOCK (playsink);
return;
}
GstElement *
gst_play_sink_get_vis_plugin (GstPlaySink * playsink)
{
GstElement *result = NULL;
GstPlayVisChain *chain;
GST_PLAY_SINK_LOCK (playsink);
if ((chain = (GstPlayVisChain *) playsink->vischain)) {
/* we have an active chain, get the sink */
if (chain->vis)
result = gst_object_ref (chain->vis);
}
/* nothing found, return last configured sink */
if (result == NULL && playsink->visualisation)
result = gst_object_ref (playsink->visualisation);
GST_PLAY_SINK_UNLOCK (playsink);
return result;
}
void
gst_play_sink_set_volume (GstPlaySink * playsink, gdouble volume)
{
GstPlayAudioChain *chain;
GST_PLAY_SINK_LOCK (playsink);
playsink->volume = volume;
chain = (GstPlayAudioChain *) playsink->audiochain;
if (chain && chain->volume) {
/* if there is a mute element or we are not muted, set the volume */
if (chain->mute || !playsink->mute)
g_object_set (chain->volume, "volume", volume, NULL);
}
GST_PLAY_SINK_UNLOCK (playsink);
}
gdouble
gst_play_sink_get_volume (GstPlaySink * playsink)
{
gdouble result;
GstPlayAudioChain *chain;
GST_PLAY_SINK_LOCK (playsink);
chain = (GstPlayAudioChain *) playsink->audiochain;
result = playsink->volume;
if (chain && chain->volume) {
if (chain->mute || !playsink->mute) {
g_object_get (chain->volume, "volume", &result, NULL);
playsink->volume = result;
}
}
GST_PLAY_SINK_UNLOCK (playsink);
return result;
}
void
gst_play_sink_set_mute (GstPlaySink * playsink, gboolean mute)
{
GstPlayAudioChain *chain;
GST_PLAY_SINK_LOCK (playsink);
playsink->mute = mute;
chain = (GstPlayAudioChain *) playsink->audiochain;
if (chain) {
if (chain->mute) {
g_object_set (chain->mute, "mute", mute, NULL);
} else if (chain->volume) {
if (mute)
g_object_set (chain->volume, "volume", (gdouble) 0.0, NULL);
else
g_object_set (chain->volume, "volume", (gdouble) playsink->volume,
NULL);
}
}
GST_PLAY_SINK_UNLOCK (playsink);
}
gboolean
gst_play_sink_get_mute (GstPlaySink * playsink)
{
gboolean result;
GstPlayAudioChain *chain;
GST_PLAY_SINK_LOCK (playsink);
chain = (GstPlayAudioChain *) playsink->audiochain;
if (chain && chain->mute) {
g_object_get (chain->mute, "mute", &result, NULL);
playsink->mute = result;
} else {
result = playsink->mute;
}
GST_PLAY_SINK_UNLOCK (playsink);
return result;
}
static void
post_missing_element_message (GstPlaySink * playsink, const gchar * name)
{
GstMessage *msg;
msg = gst_missing_element_message_new (GST_ELEMENT_CAST (playsink), name);
gst_element_post_message (GST_ELEMENT_CAST (playsink), msg);
}
static void
free_chain (GstPlayChain * chain)
{
if (chain->bin)
gst_object_unref (chain->bin);
gst_object_unref (chain->playsink);
g_free (chain);
}
static gboolean
add_chain (GstPlayChain * chain, gboolean add)
{
if (chain->added == add)
return TRUE;
if (add)
gst_bin_add (GST_BIN_CAST (chain->playsink), chain->bin);
else
gst_bin_remove (GST_BIN_CAST (chain->playsink), chain->bin);
chain->added = add;
return TRUE;
}
static gboolean
activate_chain (GstPlayChain * chain, gboolean activate)
{
if (chain->activated == activate)
return TRUE;
if (activate)
gst_element_set_state (chain->bin, GST_STATE_PAUSED);
else
gst_element_set_state (chain->bin, GST_STATE_NULL);
chain->activated = activate;
return TRUE;
}
static gint
find_property (GstElement * element, const gchar * name)
{
gint res;
if (g_object_class_find_property (G_OBJECT_GET_CLASS (element), name)) {
res = 0;
GST_DEBUG_OBJECT (element, "found %s property", name);
} else {
GST_DEBUG_OBJECT (element, "did not find %s property", name);
res = 1;
gst_object_unref (element);
}
return res;
}
/* find an object in the hierarchy with a property named @name */
static GstElement *
gst_play_sink_find_property (GstPlaySink * playsink, GstElement * obj,
const gchar * name)
{
GstElement *result = NULL;
GstIterator *it;
if (GST_IS_BIN (obj)) {
it = gst_bin_iterate_recurse (GST_BIN_CAST (obj));
result = gst_iterator_find_custom (it,
(GCompareFunc) find_property, (gpointer) name);
gst_iterator_free (it);
} else {
if (g_object_class_find_property (G_OBJECT_GET_CLASS (obj), name)) {
result = obj;
gst_object_ref (obj);
}
}
return result;
}
/* make the element (bin) that contains the elements needed to perform
* video display.
*
* +------------------------------------------------------------+
* | vbin |
* | +-------+ +----------+ +----------+ +---------+ |
* | | queue | |colorspace| |videoscale| |videosink| |
* | +-sink src-sink src-sink src-sink | |
* | | +-------+ +----------+ +----------+ +---------+ |
* sink-+ |
* +------------------------------------------------------------+
*
*/
static GstPlayVideoChain *
gen_video_chain (GstPlaySink * playsink, gboolean raw, gboolean async)
{
GstPlayVideoChain *chain;
GstBin *bin;
GstPad *pad;
chain = g_new0 (GstPlayVideoChain, 1);
chain->chain.playsink = gst_object_ref (playsink);
GST_DEBUG_OBJECT (playsink, "making video chain %p", chain);
if (playsink->video_sink) {
chain->sink = gst_object_ref (playsink->video_sink);
} else {
chain->sink = gst_element_factory_make ("autovideosink", "videosink");
if (chain->sink == NULL) {
chain->sink = gst_element_factory_make ("xvimagesink", "videosink");
}
if (chain->sink == NULL)
goto no_sinks;
}
/* if we can disable async behaviour of the sink, we can avoid adding a
* queue for the audio chain. We can't use the deep property here because the
* sink might change it's internal sink element later. */
if (g_object_class_find_property (G_OBJECT_GET_CLASS (chain->sink), "async")) {
GST_DEBUG_OBJECT (playsink, "setting async property to %d on video sink",
async);
g_object_set (chain->sink, "async", async, NULL);
chain->async = async;
} else
chain->async = TRUE;
/* create a bin to hold objects, as we create them we add them to this bin so
* that when something goes wrong we only need to unref the bin */
chain->chain.bin = gst_bin_new ("vbin");
bin = GST_BIN_CAST (chain->chain.bin);
gst_object_ref (bin);
gst_object_sink (bin);
gst_bin_add (bin, chain->sink);
if (raw) {
chain->conv = gst_element_factory_make ("ffmpegcolorspace", "vconv");
if (chain->conv == NULL)
goto no_colorspace;
gst_bin_add (bin, chain->conv);
chain->scale = gst_element_factory_make ("videoscale", "vscale");
if (chain->scale == NULL)
goto no_videoscale;
gst_bin_add (bin, chain->scale);
}
/* decouple decoder from sink, this improves playback quite a lot since the
* decoder can continue while the sink blocks for synchronisation. We don't
* need a lot of buffers as this consumes a lot of memory and we don't want
* too little because else we would be context switching too quickly. */
chain->queue = gst_element_factory_make ("queue", "vqueue");
g_object_set (G_OBJECT (chain->queue), "max-size-buffers", 3,
"max-size-bytes", 0, "max-size-time", (gint64) 0, NULL);
gst_bin_add (bin, chain->queue);
if (raw) {
gst_element_link_pads (chain->queue, "src", chain->conv, "sink");
gst_element_link_pads (chain->conv, "src", chain->scale, "sink");
/* be more careful with the pad from the custom sink element, it might not
* be named 'sink' */
if (!gst_element_link_pads (chain->scale, "src", chain->sink, NULL))
goto link_failed;
pad = gst_element_get_pad (chain->queue, "sink");
} else {
if (!gst_element_link_pads (chain->queue, "src", chain->sink, NULL))
goto link_failed;
pad = gst_element_get_pad (chain->queue, "sink");
}
chain->sinkpad = gst_ghost_pad_new ("sink", pad);
gst_object_unref (pad);
gst_element_add_pad (chain->chain.bin, chain->sinkpad);
return chain;
/* ERRORS */
no_sinks:
{
post_missing_element_message (playsink, "autovideosink");
GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN,
(_("Both autovideosink and xvimagesink elements are missing.")),
(NULL));
free_chain ((GstPlayChain *) chain);
return NULL;
}
no_colorspace:
{
post_missing_element_message (playsink, "ffmpegcolorspace");
GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"ffmpegcolorspace"), (NULL));
free_chain ((GstPlayChain *) chain);
return NULL;
}
no_videoscale:
{
post_missing_element_message (playsink, "videoscale");
GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"videoscale"), ("possibly a liboil version mismatch?"));
free_chain ((GstPlayChain *) chain);
return NULL;
}
link_failed:
{
GST_ELEMENT_ERROR (playsink, CORE, PAD,
(NULL), ("Failed to configure the video sink."));
free_chain ((GstPlayChain *) chain);
return NULL;
}
}
/* make an element for playback of video with subtitles embedded.
*
* +----------------------------------------------+
* | tbin +-------------+ |
* | +-----+ | textoverlay | |
* | | csp | +--video_sink | |
* video_sink-sink src+ +-text_sink src--+ |
* | +-----+ | +-------------+ +-- src
* text_sink-------------+ |
* +----------------------------------------------+
*/
static GstPlayTextChain *
gen_text_chain (GstPlaySink * playsink)
{
GstPlayTextChain *chain;
GstBin *bin;
GstPad *pad;
chain = g_new0 (GstPlayTextChain, 1);
chain->chain.playsink = gst_object_ref (playsink);
GST_DEBUG_OBJECT (playsink, "making text chain %p", chain);
chain->chain.bin = gst_bin_new ("tbin");
bin = GST_BIN_CAST (chain->chain.bin);
gst_object_ref (bin);
gst_object_sink (bin);
chain->conv = gst_element_factory_make ("ffmpegcolorspace", "tconv");
if (chain->conv == NULL)
goto no_colorspace;
gst_bin_add (bin, chain->conv);
chain->overlay = gst_element_factory_make ("textoverlay", "overlay");
if (chain->overlay == NULL)
goto no_overlay;
gst_bin_add (bin, chain->overlay);
/* Set some parameters */
g_object_set (G_OBJECT (chain->overlay),
"halign", "center", "valign", "bottom", NULL);
if (playsink->font_desc) {
g_object_set (G_OBJECT (chain->overlay), "font-desc", playsink->font_desc,
NULL);
}
g_object_set (G_OBJECT (chain->overlay), "wait-text", FALSE, NULL);
/* Link */
gst_element_link_pads (chain->conv, "src", chain->overlay, "video_sink");
/* Add ghost pads on the subtitle bin */
pad = gst_element_get_pad (chain->overlay, "text_sink");
chain->textsinkpad = gst_ghost_pad_new ("text_sink", pad);
gst_object_unref (pad);
gst_element_add_pad (chain->chain.bin, chain->textsinkpad);
pad = gst_element_get_pad (chain->conv, "sink");
chain->videosinkpad = gst_ghost_pad_new ("sink", pad);
gst_object_unref (pad);
gst_element_add_pad (chain->chain.bin, chain->videosinkpad);
pad = gst_element_get_pad (chain->overlay, "src");
chain->srcpad = gst_ghost_pad_new ("src", pad);
gst_object_unref (pad);
gst_element_add_pad (chain->chain.bin, chain->srcpad);
return chain;
/* ERRORS */
no_colorspace:
{
post_missing_element_message (playsink, "ffmpegcolorspace");
GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"ffmpegcolorspace"), (NULL));
free_chain ((GstPlayChain *) chain);
return NULL;
}
no_overlay:
{
post_missing_element_message (playsink, "textoverlay");
GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"textoverlay"), (NULL));
free_chain ((GstPlayChain *) chain);
return NULL;
}
}
/* make the chain that contains the elements needed to perform
* audio playback.
*
* We add a tee as the first element so that we can link the visualisation chain
* to it when requested.
*
* +-------------------------------------------------------------+
* | abin |
* | +---------+ +----------+ +---------+ +---------+ |
* | |audioconv| |audioscale| | volume | |audiosink| |
* | +-srck src-sink src-sink src-sink | |
* | | +---------+ +----------+ +---------+ +---------+ |
* sink-+ |
* +-------------------------------------------------------------+
*/
static GstPlayAudioChain *
gen_audio_chain (GstPlaySink * playsink, gboolean raw, gboolean queue)
{
GstPlayAudioChain *chain;
GstBin *bin;
gboolean res, have_volume;
GstPad *pad;
chain = g_new0 (GstPlayAudioChain, 1);
chain->chain.playsink = gst_object_ref (playsink);
GST_DEBUG_OBJECT (playsink, "making audio chain %p", chain);
if (playsink->audio_sink) {
chain->sink = gst_object_ref (playsink->audio_sink);
} else {
chain->sink = gst_element_factory_make ("autoaudiosink", "audiosink");
if (chain->sink == NULL) {
chain->sink = gst_element_factory_make ("alsasink", "audiosink");
}
if (chain->sink == NULL)
goto no_sinks;
}
chain->chain.bin = gst_bin_new ("abin");
bin = GST_BIN_CAST (chain->chain.bin);
gst_object_ref (bin);
gst_object_sink (bin);
gst_bin_add (bin, chain->sink);
if (queue) {
/* we have to add a queue when we need to decouple for the video sink in
* visualisations */
GST_DEBUG_OBJECT (playsink, "adding audio queue");
chain->queue = gst_element_factory_make ("queue", "aqueue");
gst_bin_add (bin, chain->queue);
}
/* check if the sink has the volume property, if it does we don't need to
* add a volume element. */
if (g_object_class_find_property (G_OBJECT_GET_CLASS (chain->sink), "volume")) {
GST_DEBUG_OBJECT (playsink, "the sink as a volume property");
have_volume = TRUE;
/* take ref to sink to control the volume */
chain->volume = gst_object_ref (chain->sink);
g_object_set (G_OBJECT (chain->volume), "volume", playsink->volume, NULL);
/* if the sink also has a mute property we can use this as well. We'll only
* use the mute property if there is a volume property. We can simulate the
* mute with the volume otherwise. */
if (g_object_class_find_property (G_OBJECT_GET_CLASS (chain->sink), "mute")) {
GST_DEBUG_OBJECT (playsink, "the sink as a mute property");
chain->mute = gst_object_ref (chain->sink);
}
} else {
/* no volume, we need to add a volume element when we can */
GST_DEBUG_OBJECT (playsink, "the sink as no volume property");
have_volume = FALSE;
}
if (raw) {
chain->conv = gst_element_factory_make ("audioconvert", "aconv");
if (chain->conv == NULL)
goto no_audioconvert;
gst_bin_add (bin, chain->conv);
chain->resample = gst_element_factory_make ("audioresample", "aresample");
if (chain->resample == NULL)
goto no_audioresample;
gst_bin_add (bin, chain->resample);
res = gst_element_link_pads (chain->conv, "src", chain->resample, "sink");
if (!have_volume && playsink->flags & GST_PLAY_FLAG_SOFT_VOLUME) {
chain->volume = gst_element_factory_make ("volume", "volume");
if (chain->volume == NULL)
goto no_volume;
have_volume = TRUE;
/* volume also has the mute property */
chain->mute = gst_object_ref (chain->volume);
/* configure with the latest volume and mute */
g_object_set (G_OBJECT (chain->volume), "volume", playsink->volume, NULL);
g_object_set (G_OBJECT (chain->mute), "mute", playsink->mute, NULL);
gst_bin_add (bin, chain->volume);
res &=
gst_element_link_pads (chain->resample, "src", chain->volume, "sink");
res &= gst_element_link_pads (chain->volume, "src", chain->sink, NULL);
} else {
res &= gst_element_link_pads (chain->resample, "src", chain->sink, NULL);
}
if (!res)
goto link_failed;
if (queue) {
res = gst_element_link_pads (chain->queue, "src", chain->conv, "sink");
pad = gst_element_get_pad (chain->queue, "sink");
} else {
pad = gst_element_get_pad (chain->conv, "sink");
}
} else {
if (queue) {
res = gst_element_link_pads (chain->queue, "src", chain->sink, "sink");
pad = gst_element_get_pad (chain->queue, "sink");
} else {
pad = gst_element_get_pad (chain->sink, "sink");
}
}
/* post a warning if we have no way to configure the volume */
if (!have_volume) {
GST_ELEMENT_ERROR (playsink, STREAM, NOT_IMPLEMENTED,
(_("No volume control found")), ("No volume control found"));
}
chain->sinkpad = gst_ghost_pad_new ("sink", pad);
gst_object_unref (pad);
gst_element_add_pad (chain->chain.bin, chain->sinkpad);
return chain;
/* ERRORS */
no_sinks:
{
post_missing_element_message (playsink, "autoaudiosink");
GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN,
(_("Both autoaudiosink and alsasink elements are missing.")), (NULL));
free_chain ((GstPlayChain *) chain);
return NULL;
}
no_audioconvert:
{
post_missing_element_message (playsink, "audioconvert");
GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"audioconvert"), ("possibly a liboil version mismatch?"));
free_chain ((GstPlayChain *) chain);
return NULL;
}
no_audioresample:
{
post_missing_element_message (playsink, "audioresample");
GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"audioresample"), ("possibly a liboil version mismatch?"));
free_chain ((GstPlayChain *) chain);
return NULL;
}
no_volume:
{
post_missing_element_message (playsink, "volume");
GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"volume"), ("possibly a liboil version mismatch?"));
free_chain ((GstPlayChain *) chain);
return NULL;
}
link_failed:
{
GST_ELEMENT_ERROR (playsink, CORE, PAD,
(NULL), ("Failed to configure the audio sink."));
free_chain ((GstPlayChain *) chain);
return NULL;
}
}
/*
* +-------------------------------------------------------------------+
* | visbin |
* | +----------+ +------------+ +----------+ +-------+ |
* | | visqueue | | audioconv | | audiores | | vis | |
* | +-sink src-sink + samp src-sink src-sink src-+ |
* | | +----------+ +------------+ +----------+ +-------+ | |
* sink-+ +-src
* +-------------------------------------------------------------------+
*
*/
static GstPlayVisChain *
gen_vis_chain (GstPlaySink * playsink)
{
GstPlayVisChain *chain;
GstBin *bin;
gboolean res;
GstPad *pad;
chain = g_new0 (GstPlayVisChain, 1);
chain->chain.playsink = gst_object_ref (playsink);
GST_DEBUG_OBJECT (playsink, "making vis chain %p", chain);
chain->chain.bin = gst_bin_new ("visbin");
bin = GST_BIN_CAST (chain->chain.bin);
gst_object_ref (bin);
gst_object_sink (bin);
/* we're queuing raw audio here, we can remove this queue when we can disable
* async behaviour in the video sink. */
chain->queue = gst_element_factory_make ("queue", "visqueue");
gst_bin_add (bin, chain->queue);
chain->conv = gst_element_factory_make ("audioconvert", "aconv");
if (chain->conv == NULL)
goto no_audioconvert;
gst_bin_add (bin, chain->conv);
chain->resample = gst_element_factory_make ("audioresample", "aresample");
if (chain->resample == NULL)
goto no_audioresample;
gst_bin_add (bin, chain->resample);
/* this pad will be used for blocking the dataflow and switching the vis
* plugin */
chain->blockpad = gst_element_get_pad (chain->resample, "src");
if (playsink->visualisation) {
chain->vis = gst_object_ref (playsink->visualisation);
} else {
chain->vis = gst_element_factory_make ("goom", "vis");
if (!chain->vis)
goto no_goom;
}
gst_bin_add (bin, chain->vis);
res = gst_element_link_pads (chain->queue, "src", chain->conv, "sink");
res &= gst_element_link_pads (chain->conv, "src", chain->resample, "sink");
res &= gst_element_link_pads (chain->resample, "src", chain->vis, "sink");
if (!res)
goto link_failed;
chain->vissinkpad = gst_element_get_pad (chain->vis, "sink");
chain->vissrcpad = gst_element_get_pad (chain->vis, "src");
pad = gst_element_get_pad (chain->queue, "sink");
chain->sinkpad = gst_ghost_pad_new ("sink", pad);
gst_object_unref (pad);
gst_element_add_pad (chain->chain.bin, chain->sinkpad);
chain->srcpad = gst_ghost_pad_new ("src", chain->vissrcpad);
gst_element_add_pad (chain->chain.bin, chain->srcpad);
return chain;
/* ERRORS */
no_audioconvert:
{
post_missing_element_message (playsink, "audioconvert");
GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"audioconvert"), ("possibly a liboil version mismatch?"));
free_chain ((GstPlayChain *) chain);
return NULL;
}
no_audioresample:
{
post_missing_element_message (playsink, "audioresample");
GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"audioresample"), (NULL));
free_chain ((GstPlayChain *) chain);
return NULL;
}
no_goom:
{
post_missing_element_message (playsink, "goom");
GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"goom"), (NULL));
free_chain ((GstPlayChain *) chain);
return NULL;
}
link_failed:
{
GST_ELEMENT_ERROR (playsink, CORE, PAD,
(NULL), ("Failed to configure the visualisation element."));
free_chain ((GstPlayChain *) chain);
return NULL;
}
}
/* this function is called when all the request pads are requested and when we
* have to construct the final pipeline. Based on the flags we construct the
* final output pipelines.
*/
gboolean
gst_play_sink_reconfigure (GstPlaySink * playsink)
{
GstPlayFlags flags;
gboolean need_audio, need_video, need_vis, need_text;
GST_DEBUG_OBJECT (playsink, "reconfiguring");
/* assume we need nothing */
need_audio = need_video = need_vis = need_text = FALSE;
GST_PLAY_SINK_LOCK (playsink);
GST_OBJECT_LOCK (playsink);
/* get flags, there are protected with the object lock */
flags = playsink->flags;
GST_OBJECT_UNLOCK (playsink);
/* figure out which components we need */
if (flags & GST_PLAY_FLAG_TEXT && playsink->text_pad) {
/* we subtitles and we are requested to show it, we also need to show
* video in this case. */
need_video = TRUE;
need_text = TRUE;
} else if (flags & GST_PLAY_FLAG_VIDEO && playsink->video_pad) {
/* we have video and we are requested to show it */
need_video = TRUE;
}
if (playsink->audio_pad) {
if (flags & GST_PLAY_FLAG_AUDIO) {
need_audio = TRUE;
}
if (playsink->audio_pad_raw) {
/* only can do vis with raw uncompressed audio */
if (flags & GST_PLAY_FLAG_VIS && !need_video) {
/* also add video when we add visualisation */
need_video = TRUE;
need_vis = TRUE;
}
}
}
/* set up video pipeline */
if (need_video) {
GST_DEBUG_OBJECT (playsink, "adding video, raw %d",
playsink->video_pad_raw);
if (!playsink->videochain) {
gboolean raw, async;
/* we need a raw sink when we do vis or when we have a raw pad */
raw = need_vis ? TRUE : playsink->video_pad_raw;
/* we try to set the sink async=FALSE when we need vis, this way we can
* avoid a queue in the audio chain. */
async = !need_vis;
playsink->videochain = gen_video_chain (playsink, raw, async);
}
add_chain (GST_PLAY_CHAIN (playsink->videochain), TRUE);
activate_chain (GST_PLAY_CHAIN (playsink->videochain), TRUE);
/* if we are not part of vis or subtitles, set the ghostpad target */
if (!need_vis && !need_text) {
GST_DEBUG_OBJECT (playsink, "ghosting video sinkpad");
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (playsink->video_pad),
playsink->videochain->sinkpad);
}
} else {
if (playsink->videochain) {
add_chain (GST_PLAY_CHAIN (playsink->videochain), FALSE);
activate_chain (GST_PLAY_CHAIN (playsink->videochain), FALSE);
}
if (playsink->video_pad)
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (playsink->video_pad), NULL);
}
if (need_text) {
GST_DEBUG_OBJECT (playsink, "adding text");
if (!playsink->textchain) {
playsink->textchain = gen_text_chain (playsink);
}
add_chain (GST_PLAY_CHAIN (playsink->textchain), TRUE);
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (playsink->text_pad),
playsink->textchain->textsinkpad);
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (playsink->video_pad),
playsink->textchain->videosinkpad);
gst_pad_link (playsink->textchain->srcpad, playsink->videochain->sinkpad);
activate_chain (GST_PLAY_CHAIN (playsink->textchain), TRUE);
} else {
/* we have no audio or we are requested to not play audio */
if (playsink->textchain) {
add_chain (GST_PLAY_CHAIN (playsink->textchain), FALSE);
activate_chain (GST_PLAY_CHAIN (playsink->textchain), FALSE);
}
if (!need_video && playsink->video_pad)
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (playsink->video_pad), NULL);
if (playsink->text_pad)
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (playsink->text_pad), NULL);
}
if (need_audio) {
GST_DEBUG_OBJECT (playsink, "adding audio");
if (!playsink->audiochain) {
gboolean raw, queue;
/* get a raw sink if we are asked for a raw pad */
raw = playsink->audio_pad_raw;
if (need_vis) {
/* If we are dealing with visualisations, we need to add a queue to
* decouple the audio from the video part. We only have to do this when
* the video part is async=true */
queue = ((GstPlayVideoChain *) playsink->videochain)->async;
GST_DEBUG_OBJECT (playsink, "need audio queue for vis: %d", queue);
} else {
/* no vis, we can avoid a queue */
GST_DEBUG_OBJECT (playsink, "don't need audio queue");
queue = FALSE;
}
playsink->audiochain = gen_audio_chain (playsink, raw, queue);
}
add_chain (GST_PLAY_CHAIN (playsink->audiochain), TRUE);
gst_pad_link (playsink->audio_tee_asrc, playsink->audiochain->sinkpad);
activate_chain (GST_PLAY_CHAIN (playsink->audiochain), TRUE);
} else {
/* we have no audio or we are requested to not play audio */
if (playsink->audiochain) {
gst_pad_unlink (playsink->audio_tee_asrc, playsink->audiochain->sinkpad);
add_chain (GST_PLAY_CHAIN (playsink->audiochain), FALSE);
activate_chain (GST_PLAY_CHAIN (playsink->audiochain), FALSE);
}
}
if (need_vis) {
GstPad *srcpad;
if (!playsink->vischain)
playsink->vischain = gen_vis_chain (playsink);
GST_DEBUG_OBJECT (playsink, "adding visualisation");
srcpad =
gst_element_get_pad (GST_ELEMENT_CAST (playsink->vischain->chain.bin),
"src");
add_chain (GST_PLAY_CHAIN (playsink->vischain), TRUE);
gst_pad_link (playsink->audio_tee_vissrc, playsink->vischain->sinkpad);
gst_pad_link (srcpad, playsink->videochain->sinkpad);
gst_object_unref (srcpad);
activate_chain (GST_PLAY_CHAIN (playsink->vischain), TRUE);
} else {
if (playsink->vischain) {
add_chain (GST_PLAY_CHAIN (playsink->vischain), FALSE);
activate_chain (GST_PLAY_CHAIN (playsink->vischain), FALSE);
}
}
GST_PLAY_SINK_UNLOCK (playsink);
return TRUE;
}
/**
* gst_play_sink_set_flags:
* @playsink: a #GstPlaySink
* @flags: #GstPlayFlags
*
* Configure @flags on @playsink. The flags control the behaviour of @playsink
* when constructing the sink pipelins.
*
* Returns: TRUE if the flags could be configured.
*/
gboolean
gst_play_sink_set_flags (GstPlaySink * playsink, GstPlayFlags flags)
{
g_return_val_if_fail (GST_IS_PLAY_SINK (playsink), FALSE);
GST_OBJECT_LOCK (playsink);
playsink->flags = flags;
GST_OBJECT_UNLOCK (playsink);
return TRUE;
}
/**
* gst_play_sink_get_flags:
* @playsink: a #GstPlaySink
*
* Get the flags of @playsink. That flags control the behaviour of the sink when
* it constructs the sink pipelines.
*
* Returns: the currently configured #GstPlayFlags.
*/
GstPlayFlags
gst_play_sink_get_flags (GstPlaySink * playsink)
{
GstPlayFlags res;
g_return_val_if_fail (GST_IS_PLAY_SINK (playsink), 0);
GST_OBJECT_LOCK (playsink);
res = playsink->flags;
GST_OBJECT_UNLOCK (playsink);
return res;
}
void
gst_play_sink_set_font_desc (GstPlaySink * playsink, const gchar * desc)
{
GstPlayTextChain *chain;
GST_PLAY_SINK_LOCK (playsink);
chain = (GstPlayTextChain *) playsink->textchain;
g_free (playsink->font_desc);
playsink->font_desc = g_strdup (desc);
if (chain && chain->overlay) {
g_object_set (chain->overlay, "font-desc", desc, NULL);
}
GST_PLAY_SINK_UNLOCK (playsink);
}
gchar *
gst_play_sink_get_font_desc (GstPlaySink * playsink)
{
gchar *result = NULL;
GstPlayTextChain *chain;
GST_PLAY_SINK_LOCK (playsink);
chain = (GstPlayTextChain *) playsink->textchain;
if (chain && chain->overlay) {
g_object_get (chain->overlay, "font-desc", &result, NULL);
playsink->font_desc = g_strdup (result);
} else {
result = g_strdup (playsink->font_desc);
}
GST_PLAY_SINK_UNLOCK (playsink);
return result;
}
/**
* gst_play_sink_get_last_frame:
* @playsink: a #GstPlaySink
*
* Get the last displayed frame from @playsink. This frame is in the native
* format of the sink element, the caps on the result buffer contain the format
* of the frame data.
*
* Returns: a #GstBuffer with the frame data or %NULL when no video frame is
* available.
*/
GstBuffer *
gst_play_sink_get_last_frame (GstPlaySink * playsink)
{
GstBuffer *result = NULL;
GstPlayVideoChain *chain;
GST_PLAY_SINK_LOCK (playsink);
GST_DEBUG_OBJECT (playsink, "taking last frame");
/* get the video chain if we can */
if ((chain = (GstPlayVideoChain *) playsink->videochain)) {
GST_DEBUG_OBJECT (playsink, "found video chain");
/* see if the chain is active */
if (chain->chain.activated && chain->sink) {
GstElement *elem;
GST_DEBUG_OBJECT (playsink, "video chain active and has a sink");
/* find and get the last-buffer property now */
if ((elem =
gst_play_sink_find_property (playsink, chain->sink,
"last-buffer"))) {
GST_DEBUG_OBJECT (playsink, "getting last-buffer property");
g_object_get (elem, "last-buffer", &result, NULL);
gst_object_unref (elem);
}
}
}
GST_PLAY_SINK_UNLOCK (playsink);
return result;
}
/**
* gst_play_sink_request_pad
* @playsink: a #GstPlaySink
* @type: a #GstPlaySinkType
*
* Create or return a pad of @type.
*
* Returns: a #GstPad of @type or %NULL when the pad could not be created.
*/
GstPad *
gst_play_sink_request_pad (GstPlaySink * playsink, GstPlaySinkType type)
{
GstPad *res = NULL;
gboolean created = FALSE;
gboolean raw = FALSE;
GST_PLAY_SINK_LOCK (playsink);
switch (type) {
case GST_PLAY_SINK_TYPE_AUDIO_RAW:
raw = TRUE;
case GST_PLAY_SINK_TYPE_AUDIO:
if (!playsink->audio_tee) {
/* create tee when needed. This element will feed the audio sink chain
* and the vis chain. */
playsink->audio_tee = gst_element_factory_make ("tee", "audiotee");
playsink->audio_tee_sink =
gst_element_get_pad (playsink->audio_tee, "sink");
/* get two request pads */
playsink->audio_tee_vissrc =
gst_element_get_request_pad (playsink->audio_tee, "src%d");
playsink->audio_tee_asrc =
gst_element_get_request_pad (playsink->audio_tee, "src%d");
gst_bin_add (GST_BIN_CAST (playsink), playsink->audio_tee);
gst_element_set_state (playsink->audio_tee, GST_STATE_PAUSED);
}
if (!playsink->audio_pad) {
playsink->audio_pad =
gst_ghost_pad_new ("audio_sink", playsink->audio_tee_sink);
created = TRUE;
}
playsink->audio_pad_raw = raw;
res = playsink->audio_pad;
break;
case GST_PLAY_SINK_TYPE_VIDEO_RAW:
raw = TRUE;
case GST_PLAY_SINK_TYPE_VIDEO:
if (!playsink->video_pad) {
playsink->video_pad =
gst_ghost_pad_new_no_target ("video_sink", GST_PAD_SINK);
created = TRUE;
}
playsink->video_pad_raw = raw;
res = playsink->video_pad;
break;
case GST_PLAY_SINK_TYPE_TEXT:
if (!playsink->text_pad) {
playsink->text_pad =
gst_ghost_pad_new_no_target ("text_sink", GST_PAD_SINK);
created = TRUE;
}
res = playsink->text_pad;
break;
default:
res = NULL;
break;
}
GST_PLAY_SINK_UNLOCK (playsink);
if (created && res) {
gst_pad_set_active (res, TRUE);
gst_element_add_pad (GST_ELEMENT_CAST (playsink), res);
}
return res;
}
void
gst_play_sink_release_pad (GstPlaySink * playsink, GstPad * pad)
{
GstPad **res = NULL;
GST_PLAY_SINK_LOCK (playsink);
if (pad == playsink->video_pad) {
res = &playsink->video_pad;
} else if (pad == playsink->audio_pad) {
res = &playsink->audio_pad;
} else if (pad == playsink->text_pad) {
res = &playsink->text_pad;
}
GST_PLAY_SINK_UNLOCK (playsink);
if (*res) {
gst_pad_set_active (*res, FALSE);
gst_element_remove_pad (GST_ELEMENT_CAST (playsink), *res);
*res = NULL;
}
}
/* Send an event to our sinks until one of them works; don't then send to the
* remaining sinks (unlike GstBin)
*/
static gboolean
gst_play_sink_send_event_to_sink (GstPlaySink * playsink, GstEvent * event)
{
gboolean res = TRUE;
if (playsink->videochain) {
gst_event_ref (event);
if ((res = gst_element_send_event (playsink->videochain->chain.bin, event))) {
GST_DEBUG_OBJECT (playsink, "Sent event succesfully to video sink");
goto done;
}
GST_DEBUG_OBJECT (playsink, "Event failed when sent to video sink");
}
if (playsink->audiochain) {
gst_event_ref (event);
if ((res = gst_element_send_event (playsink->audiochain->chain.bin, event))) {
GST_DEBUG_OBJECT (playsink, "Sent event succesfully to audio sink");
goto done;
}
GST_DEBUG_OBJECT (playsink, "Event failed when sent to audio sink");
}
done:
gst_event_unref (event);
return res;
}
/* We only want to send the event to a single sink (overriding GstBin's
* behaviour), but we want to keep GstPipeline's behaviour - wrapping seek
* events appropriately. So, this is a messy duplication of code. */
static gboolean
gst_play_sink_send_event (GstElement * element, GstEvent * event)
{
gboolean res = FALSE;
GstEventType event_type = GST_EVENT_TYPE (event);
switch (event_type) {
case GST_EVENT_SEEK:
GST_DEBUG_OBJECT (element, "Sending seek event to a sink");
res = gst_play_sink_send_event_to_sink (GST_PLAY_SINK (element), event);
break;
default:
res = parent_class->send_event (element, event);
break;
}
return res;
}
static GstStateChangeReturn
gst_play_sink_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstPlaySink *playsink;
playsink = GST_PLAY_SINK (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
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_READY_TO_PAUSED:
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
/* FIXME Release audio device when we implement that */
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
/* remove sinks we added */
if (playsink->videochain) {
activate_chain (GST_PLAY_CHAIN (playsink->videochain), FALSE);
add_chain (GST_PLAY_CHAIN (playsink->videochain), FALSE);
}
if (playsink->audiochain) {
activate_chain (GST_PLAY_CHAIN (playsink->audiochain), FALSE);
add_chain (GST_PLAY_CHAIN (playsink->audiochain), FALSE);
}
break;
default:
break;
}
return ret;
}
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