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gstreamer/gst-libs/gst/play/play.c
Julien Moutte 6bbaa16dcc Adding visualization. 
Original commit message from CVS:
Adding visualization.
Removing interfaces.
Preparing videoswitch integration.
2003-12-08 16:01:49 +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 "gstplay.h"
enum
{
TIME_TICK,
STREAM_LENGTH,
HAVE_VIDEO_SIZE,
LAST_SIGNAL
};
static guint gst_play_signals[LAST_SIGNAL] = { 0 };
static GstPipelineClass *parent_class = NULL;
/* ======================================================= */
/* */
/* Private Methods */
/* */
/* ======================================================= */
static gboolean
gst_play_pipeline_setup (GstPlay *play)
{
GstElement *work_thread, *video_thread;
GstElement *source, *autoplugger, *video_switch;
GstElement *video_queue, *video_colorspace, *video_scaler, *video_sink;
GstElement *audio_thread, *audio_queue, *audio_volume, *audio_sink;
GstElement *audio_tee, *vis_thread, *vis_queue, *vis_element;
GstPad *audio_tee_pad1, *audio_tee_pad2, *vis_thread_pad, *audio_sink_pad;
g_return_val_if_fail (play != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
work_thread = gst_element_factory_make ("thread", "work_thread");
if (!GST_IS_ELEMENT (work_thread))
return FALSE;
g_hash_table_insert (play->elements, "work_thread", work_thread);
gst_bin_add (GST_BIN (play), work_thread);
/* Placeholder for the source and autoplugger { fakesrc ! spider } */
source = gst_element_factory_make ("fakesrc", "source");
if (!GST_IS_ELEMENT (source))
return FALSE;
g_hash_table_insert (play->elements, "source", source);
autoplugger = gst_element_factory_make ("spider", "autoplugger");
if (!GST_IS_ELEMENT (autoplugger))
return FALSE;
g_hash_table_insert (play->elements, "autoplugger", autoplugger);
gst_bin_add_many (GST_BIN (work_thread), source, autoplugger, NULL);
gst_element_link (source, autoplugger);
/* Creating our video output bin
{ queue ! colorspace ! videoscale ! fakesink } */
video_thread = gst_element_factory_make ("thread", "video_thread");
if (!GST_IS_ELEMENT (video_thread))
return FALSE;
g_hash_table_insert (play->elements, "video_thread", video_thread);
gst_bin_add (GST_BIN (work_thread), video_thread);
/* Buffer queue for our video thread */
video_queue = gst_element_factory_make ("queue", "video_queue");
if (!GST_IS_ELEMENT (video_queue))
return FALSE;
g_hash_table_insert (play->elements, "video_queue", video_queue);
/* Colorspace conversion */
/* FIXME: Use ffcolorspace and fallback to Hermes on failure ?*/
video_colorspace = gst_element_factory_make ("colorspace",
"video_colorspace");
if (!GST_IS_ELEMENT (video_colorspace))
return FALSE;
g_hash_table_insert (play->elements, "video_colorspace",
video_colorspace);
/* 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->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->elements, "video_sink", video_sink);
/* Linking, Adding, Ghosting */
gst_element_link_many (video_queue, video_colorspace,
video_scaler, video_sink, NULL);
gst_bin_add_many (GST_BIN (video_thread), video_queue, video_colorspace,
video_scaler, video_sink, NULL);
gst_element_add_ghost_pad (video_thread,
gst_element_get_pad (video_queue, "sink"),
"sink");
video_switch = gst_element_factory_make ("videoswitch",
"video_switch");
if (!GST_IS_ELEMENT (video_switch))
return FALSE;
g_hash_table_insert (play->elements, "video_switch", video_switch);
gst_bin_add (GST_BIN (work_thread), video_switch);
/* Connecting autoplugger to video switch and video switch to video output */
gst_element_link (autoplugger, video_switch);
gst_element_link (video_switch, video_thread);
/* Creating our audio output bin
{ queue ! volume ! tee ! { queue ! goom } ! fakesink } */
audio_thread = gst_element_factory_make ("thread", "audio_thread");
if (!GST_IS_ELEMENT (audio_thread))
return FALSE;
g_hash_table_insert (play->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->elements, "audio_queue", audio_queue);
/* Volume control */
audio_volume = gst_element_factory_make ("volume", "audio_volume");
if (!GST_IS_ELEMENT (audio_volume))
return FALSE;
g_hash_table_insert (play->elements, "audio_volume", audio_volume);
/* Duplicate audio signal to sink and visualization thread */
audio_tee = gst_element_factory_make ("tee", "audio_tee");
if (!GST_IS_ELEMENT (audio_tee))
return FALSE;
audio_tee_pad1 = gst_element_get_request_pad (audio_tee, "src%d");
audio_tee_pad2 = gst_element_get_request_pad (audio_tee, "src%d");
g_hash_table_insert (play->elements, "audio_tee_pad1", audio_tee_pad1);
g_hash_table_insert (play->elements, "audio_tee_pad2", audio_tee_pad2);
g_hash_table_insert (play->elements, "audio_tee", audio_tee);
/* Placeholder for future audio sink bin */
audio_sink = gst_element_factory_make ("fakesink", "audio_sink");
if (!GST_IS_ELEMENT (audio_sink))
return FALSE;
audio_sink_pad = gst_element_get_pad (audio_sink, "sink");
g_hash_table_insert (play->elements, "audio_sink_pad", audio_sink_pad);
g_hash_table_insert (play->elements, "audio_sink", audio_sink);
/* Visualization thread */
vis_thread = gst_element_factory_make ("thread", "vis_thread");
if (!GST_IS_ELEMENT (vis_thread))
return FALSE;
g_hash_table_insert (play->elements, "vis_thread", vis_thread);
/* Buffer queue for our visualization thread */
vis_queue = gst_element_factory_make ("queue", "vis_queue");
if (!GST_IS_ELEMENT (vis_queue))
return FALSE;
g_hash_table_insert (play->elements, "vis_queue", vis_queue);
vis_element = gst_element_factory_make ("identity", "vis_element");
if (!GST_IS_ELEMENT (vis_element))
return FALSE;
g_hash_table_insert (play->elements, "vis_element", vis_element);
/* Adding, Linking, Ghosting in visualization */
gst_bin_add_many (GST_BIN (vis_thread), vis_queue, vis_element, NULL);
gst_element_link (vis_queue, vis_element);
vis_thread_pad = gst_element_add_ghost_pad (vis_thread,
gst_element_get_pad (vis_queue, "sink"),
"sink");
g_hash_table_insert (play->elements, "vis_thread_pad", vis_thread_pad);
/* Linking, Adding, Ghosting in audio */
gst_element_link_many (audio_queue, audio_volume, audio_tee, NULL);
gst_pad_link (audio_tee_pad1, audio_sink_pad);
gst_bin_add_many (GST_BIN (audio_thread), audio_queue, audio_volume,
audio_tee, vis_thread, audio_sink, NULL);
gst_element_add_ghost_pad (audio_thread,
gst_element_get_pad (audio_queue, "sink"),
"sink");
/* Connecting audio output to autoplugger */
gst_element_link (autoplugger, audio_thread);
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)
{
GstClock *clock = NULL;
g_return_val_if_fail (play != NULL, FALSE);
if (!GST_IS_PLAY (play))
{
play->tick_id = 0;
return FALSE;
}
clock = gst_bin_get_clock (GST_BIN (play));
play->time_nanos = gst_clock_get_time (clock);
g_signal_emit (G_OBJECT (play), gst_play_signals[TIME_TICK],
0,play->time_nanos);
if (GST_STATE (GST_ELEMENT (play)) == GST_STATE_PLAYING)
return TRUE;
else
{
play->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->elements,
"audio_sink_element");
video_sink_element = g_hash_table_lookup (play->elements,
"video_sink_element");
if (!GST_IS_ELEMENT (audio_sink_element) &&
!GST_IS_ELEMENT (video_sink_element))
{
play->length_id = 0;
return FALSE;
}
/* Audio first and then Video */
q = gst_element_query (audio_sink_element, GST_QUERY_TOTAL, &format, &value);
if (!q)
q = gst_element_query (video_sink_element, GST_QUERY_TOTAL, &format,
&value);
if (q)
{
play->length_nanos = value;
g_signal_emit (G_OBJECT (play), gst_play_signals[STREAM_LENGTH],
0,play->length_nanos);
play->length_id = 0;
return FALSE;
}
play->get_length_attempt++;
/* We try 16 times */
if (play->get_length_attempt > 15)
{
play->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->tick_id)
{
g_source_remove (play->tick_id);
play->tick_id = 0;
}
play->tick_id = g_timeout_add (200, (GSourceFunc) gst_play_tick_callback,
play);
play->get_length_attempt = 0;
if (play->length_id)
{
g_source_remove (play->length_id);
play->length_id = 0;
}
play->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);
}
/* =========================================== */
/* */
/* 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->length_id)
{
g_source_remove (play->length_id);
play->length_id = 0;
}
if (play->tick_id)
{
g_source_remove (play->tick_id);
play->tick_id = 0;
}
if (play->location)
{
g_free (play->location);
play->location = NULL;
}
if (play->elements)
{
g_hash_table_destroy (play->elements);
play->elements = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_play_init (GstPlay *play)
{
play->location = NULL;
play->length_nanos = 0;
play->time_nanos = 0;
play->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, *video_thread, *audio_thread;
g_return_val_if_fail (play != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
if (play->location)
g_free (play->location);
play->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->elements, "work_thread");
if (!GST_IS_ELEMENT (work_thread))
return FALSE;
video_thread = g_hash_table_lookup (play->elements, "video_thread");
if (!GST_IS_ELEMENT (video_thread))
return FALSE;
audio_thread = g_hash_table_lookup (play->elements, "audio_thread");
if (!GST_IS_ELEMENT (audio_thread))
return FALSE;
source = g_hash_table_lookup (play->elements, "source");
if (!GST_IS_ELEMENT (source))
return FALSE;
autoplugger = g_hash_table_lookup (play->elements, "autoplugger");
if (!GST_IS_ELEMENT (autoplugger))
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, video_thread);
gst_element_unlink (autoplugger, audio_thread);
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, video_thread);
gst_element_link (autoplugger, audio_thread);
g_hash_table_replace (play->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->location, NULL);
play->length_nanos = 0LL;
play->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->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;
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->elements,
"audio_sink_element");
if (GST_IS_ELEMENT (audio_sink_element))
{
gboolean s = FALSE;
GstClock *clock = gst_bin_get_clock (GST_BIN (play));
s = gst_element_seek (audio_sink_element, GST_FORMAT_TIME |
GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH,
time_nanos);
if (s)
{
play->time_nanos = gst_clock_get_time (clock);
g_signal_emit (G_OBJECT (play), gst_play_signals[TIME_TICK],
0,play->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->elements, "work_thread");
if (!GST_IS_ELEMENT (work_thread))
return FALSE;
old_data_src = g_hash_table_lookup (play->elements, "source");
if (!GST_IS_ELEMENT (old_data_src))
return FALSE;
autoplugger = g_hash_table_lookup (play->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->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);
/* 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->elements, "video_thread");
if (!GST_IS_ELEMENT (video_thread))
return FALSE;
old_video_sink = g_hash_table_lookup (play->elements, "video_sink");
if (!GST_IS_ELEMENT (old_video_sink))
return FALSE;
video_scaler = g_hash_table_lookup (play->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->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->elements, "video_sink_element",
video_sink_element);
g_signal_connect (G_OBJECT (video_sink_element), "have_video_size",
G_CALLBACK (gst_play_have_video_size), 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_sink_element;
GstPad *audio_tee_pad1, *audio_sink_pad, *old_audio_sink_pad;
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 */
old_audio_sink = g_hash_table_lookup (play->elements, "audio_sink");
if (!GST_IS_ELEMENT (old_audio_sink))
return FALSE;
old_audio_sink_pad = g_hash_table_lookup (play->elements,
"audio_sink_pad");
if (!GST_IS_PAD (old_audio_sink_pad))
return FALSE;
audio_thread = g_hash_table_lookup (play->elements, "audio_thread");
if (!GST_IS_ELEMENT (audio_thread))
return FALSE;
audio_tee_pad1 = g_hash_table_lookup (play->elements, "audio_tee_pad1");
if (!GST_IS_PAD (audio_tee_pad1))
return FALSE;
audio_sink_pad = gst_element_get_pad (audio_sink, "sink");
if (!GST_IS_PAD (audio_sink_pad))
return FALSE;
/* Unlinking old audiosink, removing it from pipeline, putting the new one
and linking it */
gst_pad_unlink (audio_tee_pad1, old_audio_sink_pad);
gst_bin_remove (GST_BIN (audio_thread), old_audio_sink);
gst_bin_add (GST_BIN (audio_thread), audio_sink);
gst_pad_link (audio_tee_pad1, audio_sink_pad);
g_hash_table_replace (play->elements, "audio_sink", audio_sink);
g_hash_table_replace (play->elements, "audio_sink_pad", audio_sink_pad);
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->elements, "audio_sink_element",
audio_sink_element);
}
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 *old_vis_element, *vis_thread, *vis_queue, *video_switch;
gboolean was_playing = FALSE;
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_PLAYING)
{
gst_element_set_state (GST_ELEMENT (play), GST_STATE_PAUSED);
was_playing = TRUE;
}
/* Getting needed objects */
vis_thread = g_hash_table_lookup (play->elements, "vis_thread");
if (!GST_IS_ELEMENT (vis_thread))
return FALSE;
old_vis_element = g_hash_table_lookup (play->elements, "vis_element");
if (!GST_IS_ELEMENT (old_vis_element))
return FALSE;
vis_queue = g_hash_table_lookup (play->elements, "vis_queue");
if (!GST_IS_ELEMENT (vis_queue))
return FALSE;
video_switch = g_hash_table_lookup (play->elements, "video_switch");
if (!GST_IS_ELEMENT (video_switch))
return FALSE;
/* Unlinking, removing the old element then adding and linking the new one */
gst_element_unlink (vis_queue, old_vis_element);
gst_element_unlink (old_vis_element, video_switch);
gst_bin_remove (GST_BIN (vis_thread), old_vis_element);
gst_bin_add (GST_BIN (vis_thread), vis_element);
gst_element_link (vis_queue, vis_element);
gst_element_link (vis_element, video_switch);
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)
{
GstPad *audio_tee_pad2, *vis_thread_pad;
gboolean connected = FALSE, was_playing = FALSE;
g_return_val_if_fail (play != NULL, FALSE);
g_return_val_if_fail (GST_IS_PLAY (play), FALSE);
vis_thread_pad = g_hash_table_lookup (play->elements, "vis_thread_pad");
if (!GST_IS_PAD (vis_thread_pad))
return FALSE;
audio_tee_pad2 = g_hash_table_lookup (play->elements, "audio_tee_pad2");
if (!GST_IS_PAD (audio_tee_pad2))
return FALSE;
if (GST_STATE (GST_ELEMENT (play)) == GST_STATE_PLAYING)
{
gst_element_set_state (GST_ELEMENT (play), GST_STATE_PAUSED);
was_playing = TRUE;
}
if (gst_pad_get_peer (vis_thread_pad) != NULL)
connected = TRUE;
else
connected = FALSE;
if ((connect) && (!connected))
{
gst_pad_link (audio_tee_pad2, vis_thread_pad);
}
else if ((!connect) && (connected))
{
gst_pad_unlink (audio_tee_pad2, vis_thread_pad);
}
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;
caps = gst_pad_get_caps (GST_PAD (pads->data));
while (caps)
{
gboolean has_video_cap = FALSE, has_audio_cap = FALSE;
if (g_ascii_strcasecmp (gst_caps_get_mime (caps),
"audio/x-raw-int") == 0)
{
has_audio_cap = TRUE;
}
if ((g_ascii_strcasecmp (gst_caps_get_mime (caps),
"video/x-raw-yuv") == 0) ||
(g_ascii_strcasecmp (gst_caps_get_mime (caps),
"video/x-raw-rgb") == 0))
{
has_video_cap = TRUE;
}
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;
}
caps = caps->next;
}
}
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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