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gstreamer/gst-libs/gst/play/gstplay.c
Julien Moutte 3325d549cd gst-libs/gst/play/gstplay.c: Another try in visualization implementation. Still have an issue with switch blocking wh... 
Original commit message from CVS:
2004-01-25  Julien MOUTTE  <julien@moutte.net>

* gst-libs/gst/play/gstplay.c: (gst_play_pipeline_setup),
(gst_play_identity_handoff), (gst_play_set_location),
(gst_play_set_visualization), (gst_play_connect_visualization): Another
try in visualization implementation. Still have an issue with switch
blocking when pulling from video_queue and only audio comes out of
spider.
* gst/switch/gstswitch.c: (gst_switch_release_pad),
(gst_switch_poll_sinkpads), (gst_switch_class_init): Implementing pad
release method. And check if the pad is usable before pulling.
2004-01-25 12:28:05 +00:00

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/* GStreamer
* Copyright (C) 2003 Julien Moutte <julien@moutte.net>
*
* 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 "gstplay.h"
enum
{
TIME_TICK,
STREAM_LENGTH,
HAVE_VIDEO_SIZE,
LAST_SIGNAL
};
struct _GstPlayPrivate {
char *location;
GHashTable *elements;
gint64 time_nanos;
gint64 length_nanos;
gint get_length_attempt;
guint tick_id;
guint length_id;
gulong handoff_hid;
};
static guint gst_play_signals[LAST_SIGNAL] = { 0 };
static GstPipelineClass *parent_class = NULL;
/* ======================================================= */
/* */
/* Private Methods */
/* */
/* ======================================================= */
static gboolean
gst_play_pipeline_setup (GstPlay *play)
{
/* Threads */
GstElement *work_thread, *audio_thread, *video_thread;
/* Main Thread elements */
GstElement *source, *autoplugger, *audioconvert, *volume, *tee, *identity;
GstElement *identity_cs;
/* Visualization bin */
GstElement *vis_bin, *vis_queue, *vis_element, *vis_cs;
/* Video Thread elements */
GstElement *video_queue, *video_switch, *video_cs, *video_balance;
GstElement *balance_cs, *video_scaler, *video_sink;
/* Audio Thread elements */
GstElement *audio_queue, *audio_sink;
/* Some useful pads */
GstPad *tee_pad1, *tee_pad2;
g_return_val_if_fail (play != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
/* Creating main thread and its elements */
{
work_thread = gst_element_factory_make ("thread", "work_thread");
if (!GST_IS_ELEMENT (work_thread))
return FALSE;
g_hash_table_insert (play->priv->elements, "work_thread", work_thread);
gst_bin_add (GST_BIN (play), work_thread);
/* Placeholder for datasrc */
source = gst_element_factory_make ("fakesrc", "source");
if (!GST_IS_ELEMENT (source))
return FALSE;
g_hash_table_insert (play->priv->elements, "source", source);
/* Autoplugger */
autoplugger = gst_element_factory_make ("spider", "autoplugger");
if (!GST_IS_ELEMENT (autoplugger))
return FALSE;
g_hash_table_insert (play->priv->elements, "autoplugger", autoplugger);
/* Make sure we convert audio to the needed format */
audioconvert = gst_element_factory_make ("audioconvert",
"audioconvert");
if (!GST_IS_ELEMENT (audioconvert))
return FALSE;
g_hash_table_insert (play->priv->elements, "volume", audioconvert);
/* Volume control */
volume = gst_element_factory_make ("volume", "volume");
if (!GST_IS_ELEMENT (volume))
return FALSE;
g_hash_table_insert (play->priv->elements, "audioconvert", volume);
/* Duplicate audio signal to audio sink and visualization thread */
tee = gst_element_factory_make ("tee", "tee");
if (!GST_IS_ELEMENT (tee))
return FALSE;
tee_pad1 = gst_element_get_request_pad (tee, "src%d");
tee_pad2 = gst_element_get_request_pad (tee, "src%d");
g_hash_table_insert (play->priv->elements, "tee_pad1", tee_pad1);
g_hash_table_insert (play->priv->elements, "tee_pad2", tee_pad2);
g_hash_table_insert (play->priv->elements, "tee", tee);
gst_bin_add_many (GST_BIN (work_thread), source, autoplugger,/* audioconvert,*/
volume, tee, NULL);
gst_element_link_many (source, autoplugger,/* audioconvert,*/ volume, tee, NULL);
/* identity ! colorspace ! switch */
identity = gst_element_factory_make ("identity", "identity");
if (!GST_IS_ELEMENT (identity))
return FALSE;
g_hash_table_insert (play->priv->elements, "identity", identity);
identity_cs = gst_element_factory_make ("ffcolorspace", "identity_cs");
if (!GST_IS_ELEMENT (identity_cs)) {
identity_cs = gst_element_factory_make ("colorspace", "identity_cs");
if (!GST_IS_ELEMENT (identity_cs))
return FALSE;
}
g_hash_table_insert (play->priv->elements, "identity_cs", identity_cs);
gst_bin_add_many (GST_BIN (work_thread), identity, identity_cs, NULL);
gst_element_link_many (autoplugger, identity, identity_cs, NULL);
}
/* Visualization bin (note: it s not added to the pipeline yet) */
{
vis_bin = gst_bin_new ("vis_bin");
if (!GST_IS_ELEMENT (vis_bin))
return FALSE;
g_hash_table_insert (play->priv->elements, "vis_bin", vis_bin);
/* Buffer queue for video data */
vis_queue = gst_element_factory_make ("queue", "vis_queue");
if (!GST_IS_ELEMENT (vis_queue))
return FALSE;
g_hash_table_insert (play->priv->elements, "vis_queue", vis_queue);
/* Visualization element placeholder */
vis_element = gst_element_factory_make ("identity", "vis_element");
if (!GST_IS_ELEMENT (vis_element))
return FALSE;
g_hash_table_insert (play->priv->elements, "vis_element", vis_element);
/* Colorspace conversion */
vis_cs = gst_element_factory_make ("ffcolorspace", "vis_cs");
if (!GST_IS_ELEMENT (vis_cs)) {
vis_cs = gst_element_factory_make ("colorspace", "vis_cs");
if (!GST_IS_ELEMENT (vis_cs))
return FALSE;
}
g_hash_table_insert (play->priv->elements, "vis_cs", vis_cs);
gst_bin_add_many (GST_BIN (vis_bin), vis_queue, vis_element, vis_cs, NULL);
gst_element_link_many (vis_queue, vis_element, vis_cs, NULL);
gst_element_add_ghost_pad (vis_bin,
gst_element_get_pad (vis_cs, "src"), "src");
}
/* Creating our video output bin */
{
video_thread = gst_element_factory_make ("thread", "video_thread");
if (!GST_IS_ELEMENT (video_thread))
return FALSE;
g_hash_table_insert (play->priv->elements, "video_thread", video_thread);
gst_bin_add (GST_BIN (work_thread), video_thread);
/* Buffer queue for video data */
video_queue = gst_element_factory_make ("queue", "video_queue");
if (!GST_IS_ELEMENT (video_queue))
return FALSE;
g_hash_table_insert (play->priv->elements, "video_queue", video_queue);
video_switch = gst_element_factory_make ("switch", "video_switch");
if (!GST_IS_ELEMENT (video_switch))
return FALSE;
g_hash_table_insert (play->priv->elements, "video_switch", video_switch);
/* Colorspace conversion */
video_cs = gst_element_factory_make ("ffcolorspace", "video_cs");
if (!GST_IS_ELEMENT (video_cs)) {
video_cs = gst_element_factory_make ("colorspace", "video_cs");
if (!GST_IS_ELEMENT (video_cs))
return FALSE;
}
g_hash_table_insert (play->priv->elements, "video_cs", video_cs);
/* Software colorbalance */
video_balance = gst_element_factory_make ("videobalance",
"video_balance");
if (!GST_IS_ELEMENT (video_balance))
return FALSE;
g_hash_table_insert (play->priv->elements, "video_balance",
video_balance);
/* Colorspace conversion */
balance_cs = gst_element_factory_make ("ffcolorspace", "balance_cs");
if (!GST_IS_ELEMENT (balance_cs)) {
balance_cs = gst_element_factory_make ("colorspace", "balance_cs");
if (!GST_IS_ELEMENT (balance_cs))
return FALSE;
}
g_hash_table_insert (play->priv->elements, "balance_cs", balance_cs);
/* Software scaling of video stream */
video_scaler = gst_element_factory_make ("videoscale", "video_scaler");
if (!GST_IS_ELEMENT (video_scaler))
return FALSE;
g_hash_table_insert (play->priv->elements, "video_scaler", video_scaler);
/* Placeholder for future video sink bin */
video_sink = gst_element_factory_make ("fakesink", "video_sink");
if (!GST_IS_ELEMENT (video_sink))
return FALSE;
g_hash_table_insert (play->priv->elements, "video_sink", video_sink);
gst_bin_add_many (GST_BIN (video_thread), video_queue, video_switch, video_cs,
video_balance, balance_cs, video_scaler, video_sink, NULL);
gst_element_link_many (video_queue, video_switch, video_cs, video_balance,
balance_cs, video_scaler, video_sink, NULL);
gst_element_add_ghost_pad (video_thread,
gst_element_get_pad (video_queue, "sink"),
"sink");
gst_element_link (identity_cs, video_thread);
}
/* Creating our audio output bin
{ queue ! fakesink } */
{
audio_thread = gst_element_factory_make ("thread", "audio_thread");
if (!GST_IS_ELEMENT (audio_thread))
return FALSE;
g_hash_table_insert (play->priv->elements, "audio_thread", audio_thread);
gst_bin_add (GST_BIN (work_thread), audio_thread);
/* Buffer queue for our audio thread */
audio_queue = gst_element_factory_make ("queue", "audio_queue");
if (!GST_IS_ELEMENT (audio_queue))
return FALSE;
g_hash_table_insert (play->priv->elements, "audio_queue", audio_queue);
/* Placeholder for future audio sink bin */
audio_sink = gst_element_factory_make ("fakesink", "audio_sink");
if (!GST_IS_ELEMENT (audio_sink))
return FALSE;
g_hash_table_insert (play->priv->elements, "audio_sink", audio_sink);
gst_bin_add_many (GST_BIN (audio_thread), audio_queue, audio_sink, NULL);
gst_element_link (audio_queue, audio_sink);
gst_element_add_ghost_pad (audio_thread,
gst_element_get_pad (audio_queue, "sink"),
"sink");
gst_pad_link (tee_pad2, gst_element_get_pad (audio_queue, "sink"));
}
return TRUE;
}
static void
gst_play_have_video_size (GstElement *element, gint width,
gint height, GstPlay *play)
{
g_return_if_fail (play != NULL);
g_return_if_fail (GST_IS_PLAY (play));
g_signal_emit (G_OBJECT (play), gst_play_signals[HAVE_VIDEO_SIZE],
0, width, height);
}
static gboolean
gst_play_tick_callback (GstPlay *play)
{
GstElement* audio_sink_element;
GstClockTime time;
g_return_val_if_fail (play != NULL, FALSE);
if (!GST_IS_PLAY (play)) {
play->priv->tick_id = 0;
return FALSE;
}
audio_sink_element = g_hash_table_lookup (play->priv->elements,
"audio_sink_element");
time = gst_element_get_time (audio_sink_element);
play->priv->time_nanos = GST_CLOCK_TIME_IS_VALID (time) ? time : 0;
g_signal_emit (G_OBJECT (play), gst_play_signals[TIME_TICK],
0,play->priv->time_nanos);
if (GST_STATE (GST_ELEMENT (play)) == GST_STATE_PLAYING)
return TRUE;
else {
play->priv->tick_id = 0;
return FALSE;
}
}
static gboolean
gst_play_get_length_callback (GstPlay *play)
{
GstElement *audio_sink_element, *video_sink_element;
GstFormat format = GST_FORMAT_TIME;
gint64 value;
gboolean q = FALSE;
g_return_val_if_fail (play != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
/* We try to get length from all real sink elements */
audio_sink_element = g_hash_table_lookup (play->priv->elements,
"audio_sink_element");
video_sink_element = g_hash_table_lookup (play->priv->elements,
"video_sink_element");
if (!GST_IS_ELEMENT (audio_sink_element) &&
!GST_IS_ELEMENT (video_sink_element)) {
play->priv->length_id = 0;
return FALSE;
}
/* Audio first and then Video */
if (GST_IS_ELEMENT (audio_sink_element))
q = gst_element_query (audio_sink_element, GST_QUERY_TOTAL, &format,
&value);
if ( (!q) && (GST_IS_ELEMENT (video_sink_element)) )
q = gst_element_query (video_sink_element, GST_QUERY_TOTAL, &format,
&value);
if (q) {
play->priv->length_nanos = value;
g_signal_emit (G_OBJECT (play), gst_play_signals[STREAM_LENGTH],
0,play->priv->length_nanos);
play->priv->length_id = 0;
return FALSE;
}
play->priv->get_length_attempt++;
/* We try 16 times */
if (play->priv->get_length_attempt > 15) {
play->priv->length_id = 0;
return FALSE;
}
else
return TRUE;
}
static void
gst_play_state_change (GstElement *element, GstElementState old,
GstElementState state)
{
GstPlay *play;
g_return_if_fail (element != NULL);
g_return_if_fail (GST_IS_PLAY (element));
play = GST_PLAY (element);
if (state == GST_STATE_PLAYING) {
if (play->priv->tick_id) {
g_source_remove (play->priv->tick_id);
play->priv->tick_id = 0;
}
play->priv->tick_id = g_timeout_add (200,
(GSourceFunc) gst_play_tick_callback,
play);
play->priv->get_length_attempt = 0;
if (play->priv->length_id) {
g_source_remove (play->priv->length_id);
play->priv->length_id = 0;
}
play->priv->length_id = g_timeout_add (200,
(GSourceFunc) gst_play_get_length_callback,
play);
}
if (GST_ELEMENT_CLASS (parent_class)->state_change)
GST_ELEMENT_CLASS (parent_class)->state_change (element, old, state);
}
static void
gst_play_identity_handoff (GstElement *identity, GstBuffer *buf, GstPlay *play)
{
g_signal_handler_disconnect (G_OBJECT (identity), play->priv->handoff_hid);
play->priv->handoff_hid = 0;
gst_play_connect_visualization (play, FALSE);
}
/* =========================================== */
/* */
/* Init & Dispose & Class init */
/* */
/* =========================================== */
static void
gst_play_dispose (GObject *object)
{
GstPlay *play;
g_return_if_fail (object != NULL);
g_return_if_fail (GST_IS_PLAY (object));
play = GST_PLAY (object);
if (play->priv->length_id) {
g_source_remove (play->priv->length_id);
play->priv->length_id = 0;
}
if (play->priv->tick_id) {
g_source_remove (play->priv->tick_id);
play->priv->tick_id = 0;
}
if (play->priv->location) {
g_free (play->priv->location);
play->priv->location = NULL;
}
if (play->priv->elements) {
g_hash_table_destroy (play->priv->elements);
play->priv->elements = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_play_init (GstPlay *play)
{
play->priv = g_new0 (GstPlayPrivate, 1);
play->priv->location = NULL;
play->priv->length_nanos = 0;
play->priv->time_nanos = 0;
play->priv->elements = g_hash_table_new (g_str_hash, g_str_equal);
if (!gst_play_pipeline_setup (play))
g_warning ("libgstplay: failed initializing pipeline");
}
static void
gst_play_class_init (GstPlayClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
gobject_class->dispose = gst_play_dispose;
element_class->state_change = gst_play_state_change;
gst_play_signals[TIME_TICK] =
g_signal_new ("time_tick", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GstPlayClass, time_tick), NULL, NULL,
gst_marshal_VOID__INT64, G_TYPE_NONE, 1, G_TYPE_INT64);
gst_play_signals[STREAM_LENGTH] =
g_signal_new ("stream_length", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GstPlayClass, stream_length), NULL, NULL,
gst_marshal_VOID__INT64, G_TYPE_NONE, 1, G_TYPE_INT64);
gst_play_signals[HAVE_VIDEO_SIZE] =
g_signal_new ("have_video_size", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GstPlayClass, have_video_size), NULL, NULL,
gst_marshal_VOID__INT_INT, G_TYPE_NONE, 2,
G_TYPE_INT, G_TYPE_INT);
}
/* ======================================================= */
/* */
/* Public Methods */
/* */
/* ======================================================= */
/**
* gst_play_set_location:
* @play: a #GstPlay.
* @location: a const #char* indicating location to play
*
* Set location of @play to @location.
*
* Returns: TRUE if location was set successfully.
*/
gboolean
gst_play_set_location (GstPlay *play, const char *location)
{
GstElement *work_thread, *source, *autoplugger;
GstElement *audioconvert, *identity;
g_return_val_if_fail (play != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
if (play->priv->location)
g_free (play->priv->location);
play->priv->location = g_strdup (location);
if (GST_STATE (GST_ELEMENT (play)) != GST_STATE_READY)
gst_element_set_state (GST_ELEMENT (play), GST_STATE_READY);
work_thread = g_hash_table_lookup (play->priv->elements, "work_thread");
if (!GST_IS_ELEMENT (work_thread))
return FALSE;
source = g_hash_table_lookup (play->priv->elements, "source");
if (!GST_IS_ELEMENT (source))
return FALSE;
autoplugger = g_hash_table_lookup (play->priv->elements, "autoplugger");
if (!GST_IS_ELEMENT (autoplugger))
return FALSE;
audioconvert = g_hash_table_lookup (play->priv->elements, "audioconvert");
if (!GST_IS_ELEMENT (audioconvert))
return FALSE;
identity = g_hash_table_lookup (play->priv->elements, "identity");
if (!GST_IS_ELEMENT (identity))
return FALSE;
/* Spider can autoplugg only once. We remove the actual one and put a new
autoplugger */
gst_element_unlink (source, autoplugger);
gst_element_unlink (autoplugger, identity);
gst_element_unlink (autoplugger, audioconvert);
gst_bin_remove (GST_BIN (work_thread), autoplugger);
autoplugger = gst_element_factory_make ("spider", "autoplugger");
if (!GST_IS_ELEMENT (autoplugger))
return FALSE;
gst_bin_add (GST_BIN (work_thread), autoplugger);
gst_element_link (source, autoplugger);
gst_element_link (autoplugger, identity);
gst_element_link (autoplugger, audioconvert);
g_hash_table_replace (play->priv->elements, "autoplugger", autoplugger);
/* FIXME: Why don't we have an interface to do that kind of stuff ? */
g_object_set (G_OBJECT (source), "location", play->priv->location, NULL);
play->priv->length_nanos = 0LL;
play->priv->time_nanos = 0LL;
g_signal_emit (G_OBJECT (play), gst_play_signals[STREAM_LENGTH], 0, 0LL);
g_signal_emit (G_OBJECT (play), gst_play_signals[TIME_TICK], 0, 0LL);
return TRUE;
}
/**
* gst_play_get_location:
* @play: a #GstPlay.
*
* Get current location of @play.
*
* Returns: a const #char* pointer to current location.
*/
char *
gst_play_get_location (GstPlay *play)
{
g_return_val_if_fail (play != NULL, NULL);
g_return_val_if_fail (GST_IS_PLAY (play), NULL);
return g_strdup (play->priv->location);
}
/**
* gst_play_seek_to_time:
* @play: a #GstPlay.
* @time_nanos: a #gint64 indicating a time position.
*
* Performs a seek on @play until @time_nanos.
*/
gboolean
gst_play_seek_to_time (GstPlay * play, gint64 time_nanos)
{
GstElement *audio_sink_element, *video_sink_element;
g_return_val_if_fail (play != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
if (time_nanos < 0LL)
time_nanos = 0LL;
audio_sink_element = g_hash_table_lookup (play->priv->elements,
"audio_sink_element");
video_sink_element = g_hash_table_lookup (play->priv->elements,
"video_sink_element");
if (GST_IS_ELEMENT (audio_sink_element) &&
GST_IS_ELEMENT (video_sink_element)) {
gboolean s = FALSE;
s = gst_element_seek (audio_sink_element, GST_FORMAT_TIME |
GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH,
time_nanos);
if (!s) {
s = gst_element_seek (video_sink_element, GST_FORMAT_TIME |
GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH,
time_nanos);
}
if (s) {
GstClockTime time;
time = gst_element_get_time (audio_sink_element);
play->priv->time_nanos = GST_CLOCK_TIME_IS_VALID (time) ? time : 0;
g_signal_emit (G_OBJECT (play), gst_play_signals[TIME_TICK],
0,play->priv->time_nanos);
}
}
return TRUE;
}
/**
* gst_play_set_data_src:
* @play: a #GstPlay.
* @data_src: a #GstElement.
*
* Set @data_src as the source element of @play.
*
* Returns: TRUE if call succeeded.
*/
gboolean
gst_play_set_data_src (GstPlay *play, GstElement *data_src)
{
GstElement *work_thread, *old_data_src, *autoplugger;
g_return_val_if_fail (play != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
/* We bring back the pipeline to READY */
if (GST_STATE (GST_ELEMENT (play)) != GST_STATE_READY)
gst_element_set_state (GST_ELEMENT (play), GST_STATE_READY);
/* Getting needed objects */
work_thread = g_hash_table_lookup (play->priv->elements, "work_thread");
if (!GST_IS_ELEMENT (work_thread))
return FALSE;
old_data_src = g_hash_table_lookup (play->priv->elements, "source");
if (!GST_IS_ELEMENT (old_data_src))
return FALSE;
autoplugger = g_hash_table_lookup (play->priv->elements, "autoplugger");
if (!GST_IS_ELEMENT (autoplugger))
return FALSE;
/* Unlinking old source from autoplugger, removing it from pipeline, adding
the new one and connecting it to autoplugger FIXME: we should put a new
autoplugger here as spider can autoplugg only once */
gst_element_unlink (old_data_src, autoplugger);
gst_bin_remove (GST_BIN (work_thread), old_data_src);
gst_bin_add (GST_BIN (work_thread), data_src);
gst_element_link (data_src, autoplugger);
g_hash_table_replace (play->priv->elements, "source", data_src);
return TRUE;
}
/**
* gst_play_set_video_sink:
* @play: a #GstPlay.
* @video_sink: a #GstElement.
*
* Set @video_sink as the video sink element of @play.
*
* Returns: TRUE if call succeeded.
*/
gboolean
gst_play_set_video_sink (GstPlay *play, GstElement *video_sink)
{
GstElement *video_thread, *old_video_sink, *video_scaler, *video_sink_element;
g_return_val_if_fail (play != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
g_return_val_if_fail (video_sink != NULL, FALSE);
g_return_val_if_fail (GST_IS_ELEMENT (video_sink), FALSE);
/* We bring back the pipeline to READY */
if (GST_STATE (GST_ELEMENT (play)) != GST_STATE_READY)
gst_element_set_state (GST_ELEMENT (play), GST_STATE_READY);
/* Getting needed objects */
video_thread = g_hash_table_lookup (play->priv->elements, "video_thread");
if (!GST_IS_ELEMENT (video_thread))
return FALSE;
old_video_sink = g_hash_table_lookup (play->priv->elements, "video_sink");
if (!GST_IS_ELEMENT (old_video_sink))
return FALSE;
video_scaler = g_hash_table_lookup (play->priv->elements, "video_scaler");
if (!GST_IS_ELEMENT (video_scaler))
return FALSE;
/* Unlinking old video sink from video scaler, removing it from pipeline,
adding the new one and linking it */
gst_element_unlink (video_scaler, old_video_sink);
gst_bin_remove (GST_BIN (video_thread), old_video_sink);
gst_bin_add (GST_BIN (video_thread), video_sink);
gst_element_link (video_scaler, video_sink);
g_hash_table_replace (play->priv->elements, "video_sink", video_sink);
video_sink_element = gst_play_get_sink_element (play, video_sink,
GST_PLAY_SINK_TYPE_VIDEO);
if (GST_IS_ELEMENT (video_sink_element)) {
g_hash_table_replace (play->priv->elements, "video_sink_element",
video_sink_element);
if (GST_IS_X_OVERLAY (video_sink_element)) {
g_signal_connect (G_OBJECT (video_sink_element),
"desired_size_changed",
G_CALLBACK (gst_play_have_video_size), play);
}
}
gst_element_set_state (video_sink, GST_STATE (GST_ELEMENT(play)));
return TRUE;
}
/**
* gst_play_set_audio_sink:
* @play: a #GstPlay.
* @audio_sink: a #GstElement.
*
* Set @audio_sink as the audio sink element of @play.
*
* Returns: TRUE if call succeeded.
*/
gboolean
gst_play_set_audio_sink (GstPlay *play, GstElement *audio_sink)
{
GstElement *old_audio_sink, *audio_thread, *audio_queue, *audio_sink_element;
g_return_val_if_fail (play != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
g_return_val_if_fail (audio_sink != NULL, FALSE);
g_return_val_if_fail (GST_IS_ELEMENT (audio_sink), FALSE);
/* We bring back the pipeline to READY */
if (GST_STATE (GST_ELEMENT (play)) != GST_STATE_READY)
gst_element_set_state (GST_ELEMENT (play), GST_STATE_READY);
/* Getting needed objects */
old_audio_sink = g_hash_table_lookup (play->priv->elements, "audio_sink");
if (!GST_IS_ELEMENT (old_audio_sink))
return FALSE;
audio_thread = g_hash_table_lookup (play->priv->elements, "audio_thread");
if (!GST_IS_ELEMENT (audio_thread))
return FALSE;
audio_queue = g_hash_table_lookup (play->priv->elements, "audio_queue");
if (!GST_IS_ELEMENT (audio_queue))
return FALSE;
/* Unlinking old audiosink, removing it from pipeline, putting the new one
and linking it */
gst_element_unlink (audio_queue, old_audio_sink);
gst_bin_remove (GST_BIN (audio_thread), old_audio_sink);
gst_bin_add (GST_BIN (audio_thread), audio_sink);
gst_element_link (audio_queue, audio_sink);
g_hash_table_replace (play->priv->elements, "audio_sink", audio_sink);
audio_sink_element = gst_play_get_sink_element (play, audio_sink,
GST_PLAY_SINK_TYPE_AUDIO);
if (GST_IS_ELEMENT (audio_sink_element)) {
g_hash_table_replace (play->priv->elements, "audio_sink_element",
audio_sink_element);
}
gst_element_set_state (audio_sink, GST_STATE (GST_ELEMENT(play)));
return TRUE;
}
/**
* gst_play_set_visualization:
* @play: a #GstPlay.
* @element: a #GstElement.
*
* Set @video_sink as the video sink element of @play.
*
* Returns: TRUE if call succeeded.
*/
gboolean
gst_play_set_visualization (GstPlay *play, GstElement *vis_element)
{
GstElement *vis_bin, *vis_queue, *old_vis_element, *vis_cs;
gboolean was_playing = FALSE;
g_return_val_if_fail (play != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
g_return_val_if_fail (vis_element != NULL, FALSE);
g_return_val_if_fail (GST_IS_ELEMENT (vis_element), FALSE);
/* Getting needed objects */
vis_bin = g_hash_table_lookup (play->priv->elements, "vis_bin");
if (!GST_IS_ELEMENT (vis_bin))
return FALSE;
vis_queue = g_hash_table_lookup (play->priv->elements, "vis_queue");
if (!GST_IS_ELEMENT (vis_queue))
return FALSE;
old_vis_element = g_hash_table_lookup (play->priv->elements,
"vis_element");
if (!GST_IS_ELEMENT (old_vis_element))
return FALSE;
vis_cs = g_hash_table_lookup (play->priv->elements, "vis_cs");
if (!GST_IS_ELEMENT (vis_cs))
return FALSE;
/* We bring back the pipeline to PAUSED */
if (GST_STATE (GST_ELEMENT (play)) == GST_STATE_PLAYING) {
gst_element_set_state (GST_ELEMENT (play), GST_STATE_PAUSED);
was_playing = TRUE;
}
gst_element_unlink_many (vis_queue, old_vis_element, vis_cs, NULL);
gst_bin_remove (GST_BIN (vis_bin), old_vis_element);
gst_bin_add (GST_BIN (vis_bin), vis_element);
gst_element_link_many (vis_queue, vis_element, vis_cs, NULL);
g_hash_table_replace (play->priv->elements, "vis_element", vis_element);
if (was_playing)
gst_element_set_state (GST_ELEMENT (play), GST_STATE_PLAYING);
return TRUE;
}
/**
* gst_play_connect_visualization:
* @play: a #GstPlay.
* @connect: a #gboolean indicating wether or not
* visualization should be connected.
*
* Connect or disconnect visualization bin in @play.
*
* Returns: TRUE if call succeeded.
*/
gboolean
gst_play_connect_visualization (GstPlay * play, gboolean connect)
{
GstElement *video_thread, *vis_queue, *vis_bin, *video_switch, *identity;
GstPad *tee_pad1, *vis_queue_pad, *vis_bin_pad, *switch_pad;
gboolean was_playing = FALSE;
g_return_val_if_fail (play != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
/* Getting needed objects */
video_thread = g_hash_table_lookup (play->priv->elements, "video_thread");
if (!GST_IS_ELEMENT (video_thread))
return FALSE;
vis_bin = g_hash_table_lookup (play->priv->elements, "vis_bin");
if (!GST_IS_ELEMENT (vis_bin))
return FALSE;
vis_queue = g_hash_table_lookup (play->priv->elements, "vis_queue");
if (!GST_IS_ELEMENT (vis_queue))
return FALSE;
video_switch = g_hash_table_lookup (play->priv->elements, "video_switch");
if (!GST_IS_ELEMENT (video_switch))
return FALSE;
identity = g_hash_table_lookup (play->priv->elements, "identity");
if (!GST_IS_ELEMENT (identity))
return FALSE;
tee_pad1 = g_hash_table_lookup (play->priv->elements, "tee_pad1");
if (!GST_IS_PAD (tee_pad1))
return FALSE;
vis_queue_pad = gst_element_get_pad (vis_queue, "sink");
/* Check if the vis element is in the pipeline. That means visualization is
connected already */
if (gst_element_get_managing_bin (vis_bin)) {
/* If we are supposed to connect then nothing to do we return */
if (connect) {
return TRUE;
}
/* Disconnecting visualization */
/* We bring back the pipeline to PAUSED */
if (GST_STATE (GST_ELEMENT (play)) == GST_STATE_PLAYING) {
gst_element_set_state (GST_ELEMENT (play), GST_STATE_PAUSED);
was_playing = TRUE;
}
/* Unlinking, removing */
gst_pad_unlink (tee_pad1, vis_queue_pad);
vis_bin_pad = gst_element_get_pad (vis_bin, "src");
switch_pad = gst_pad_get_peer (vis_bin_pad);
gst_pad_unlink (vis_bin_pad, switch_pad);
gst_element_release_request_pad (video_switch, switch_pad);
gst_object_ref (GST_OBJECT (vis_bin));
gst_bin_remove (GST_BIN (video_thread), vis_bin);
}
else {
/* If we are supposed to disconnect then nothing to do we return */
if (!connect) {
return TRUE;
}
/* Connecting visualization */
/* We bring back the pipeline to PAUSED */
if (GST_STATE (GST_ELEMENT (play)) == GST_STATE_PLAYING) {
gst_element_set_state (GST_ELEMENT (play), GST_STATE_PAUSED);
was_playing = TRUE;
}
/* Adding, linking */
play->priv->handoff_hid = g_signal_connect (G_OBJECT (identity),
"handoff",
G_CALLBACK (gst_play_identity_handoff), play);
gst_bin_add (GST_BIN (video_thread), vis_bin);
gst_pad_link (tee_pad1, vis_queue_pad);
gst_element_link (vis_bin, video_switch);
}
if (was_playing)
gst_element_set_state (GST_ELEMENT (play), GST_STATE_PLAYING);
return TRUE;
}
/**
* gst_play_get_sink_element:
* @play: a #GstPlay.
* @element: a #GstElement.
* @sink_type: a #GstPlaySinkType.
*
* Searches recursively for a sink #GstElement with
* type @sink_type in @element which is supposed to be a #GstBin.
*
* Returns: the sink #GstElement of @element.
*/
GstElement *
gst_play_get_sink_element (GstPlay *play,
GstElement *element, GstPlaySinkType sink_type)
{
GList *elements = NULL;
const GList *pads = NULL;
gboolean has_src, has_correct_type;
g_return_val_if_fail (play != NULL, NULL);
g_return_val_if_fail (element != NULL, NULL);
g_return_val_if_fail (GST_IS_PLAY (play), NULL);
g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
if (!GST_IS_BIN (element)) {
/* since its not a bin, we'll presume this
* element is a sink element */
return element;
}
elements = (GList *) gst_bin_get_list (GST_BIN (element));
/* traverse all elements looking for a src pad */
while (elements) {
element = GST_ELEMENT (elements->data);
/* Recursivity :) */
if (GST_IS_BIN (element)) {
element = gst_play_get_sink_element (play, element, sink_type);
if (GST_IS_ELEMENT (element))
return element;
}
else {
pads = gst_element_get_pad_list (element);
has_src = FALSE;
has_correct_type = FALSE;
while (pads) {
/* check for src pad */
if (GST_PAD_DIRECTION (GST_PAD (pads->data)) == GST_PAD_SRC) {
has_src = TRUE;
break;
}
else {
/* If not a src pad checking caps */
GstCaps *caps;
GstStructure *structure;
gboolean has_video_cap = FALSE;
gboolean has_audio_cap = FALSE;
caps = gst_pad_get_caps (GST_PAD (pads->data));
structure = gst_caps_get_structure (caps, 0);
if (strcmp (gst_structure_get_name (structure),
"audio/x-raw-int") == 0) {
has_audio_cap = TRUE;
}
if (strcmp (gst_structure_get_name (structure),
"video/x-raw-yuv") == 0 ||
strcmp (gst_structure_get_name (structure),
"video/x-raw-rgb") == 0) {
has_video_cap = TRUE;
}
gst_caps_free (caps);
switch (sink_type) {
case GST_PLAY_SINK_TYPE_AUDIO:
if (has_audio_cap)
has_correct_type = TRUE;
break;;
case GST_PLAY_SINK_TYPE_VIDEO:
if (has_video_cap)
has_correct_type = TRUE;
break;;
case GST_PLAY_SINK_TYPE_ANY:
if ((has_video_cap) || (has_audio_cap))
has_correct_type = TRUE;
break;;
default:
has_correct_type = FALSE;
}
}
pads = g_list_next (pads);
}
if ((!has_src) && (has_correct_type))
return element;
}
elements = g_list_next (elements);
}
/* we didn't find a sink element */
return NULL;
}
GstPlay *
gst_play_new (void)
{
GstPlay *play = g_object_new (GST_TYPE_PLAY, NULL);
return play;
}
/* =========================================== */
/* */
/* Object typing & Creation */
/* */
/* =========================================== */
GType
gst_play_get_type (void)
{
static GType play_type = 0;
if (!play_type) {
static const GTypeInfo play_info = {
sizeof (GstPlayClass),
NULL,
NULL,
(GClassInitFunc) gst_play_class_init,
NULL,
NULL,
sizeof (GstPlay),
0,
(GInstanceInitFunc) gst_play_init,
NULL
};
play_type = g_type_register_static (GST_TYPE_PIPELINE, "GstPlay",
&play_info, 0);
}
return play_type;
}
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