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gstreamer/gst/playback/gstplaysink.c
Wim Taymans 76456cb647 gst/playback/gstplaysink.c: Add some more comments. 
Original commit message from CVS:
* gst/playback/gstplaysink.c: (gst_play_sink_set_vis_plugin):
Add some more comments.
2008-07-31 13:06:13 +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_static_pad (chain->vis, "sink");
chain->vissrcpad = gst_element_get_static_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. If the callback never happens, we don't have new data so
* we don't need the new vis plugin. If the pad was already blocked, the
* function returns FALSE but the previous pad block will do the right thing
* anyway. */
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_static_pad (chain->queue, "sink");
} else {
if (!gst_element_link_pads (chain->queue, "src", chain->sink, NULL))
goto link_failed;
pad = gst_element_get_static_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_static_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_static_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_static_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 has 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 has 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 has 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_static_pad (chain->queue, "sink");
} else {
pad = gst_element_get_static_pad (chain->conv, "sink");
}
} else {
if (queue) {
res = gst_element_link_pads (chain->queue, "src", chain->sink, "sink");
pad = gst_element_get_static_pad (chain->queue, "sink");
} else {
pad = gst_element_get_static_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_static_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_static_pad (chain->vis, "sink");
chain->vissrcpad = gst_element_get_static_pad (chain->vis, "src");
pad = gst_element_get_static_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 have 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 subtitles/text or we are requested to not show them */
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_static_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_static_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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