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gstreamer/gst/playback/gstplaybin.c
Ronald S. Bultje 0209cb45e5 gst/playback/: Rough port of playbin. Needs some more work, but is mostly done, and uses a few locks in important pla... 
Original commit message from CVS:
* gst/playback/gstplaybasebin.c: (gst_play_base_bin_get_type),
(gst_play_base_bin_class_init), (gst_play_base_bin_finalize),
(get_active_group), (get_building_group), (group_destroy),
(group_commit), (check_queue), (queue_overrun),
(queue_threshold_reached), (queue_out_of_data),
(gen_preroll_element), (remove_groups), (unknown_type),
(add_element_stream), (no_more_pads), (probe_triggered),
(preroll_unlinked), (new_decoded_pad), (setup_subtitle),
(setup_substreams), (setup_source), (finish_source),
(prepare_output), (muted_group_change_state),
(gst_play_base_bin_set_property), (gst_play_base_bin_get_property),
(gst_play_base_bin_change_state):
* gst/playback/gstplaybasebin.h:
* gst/playback/gstplaybin.c: (gst_play_bin_class_init),
(gst_play_bin_init), (gst_play_bin_set_property),
(gen_video_element), (gen_text_element), (gen_audio_element),
(gen_vis_element), (remove_sinks), (add_sink), (setup_sinks),
(gst_play_bin_change_state):
* gst/playback/gststreaminfo.c: (gst_stream_info_class_init),
(cb_probe), (gst_stream_info_new), (gst_stream_info_dispose),
(stream_info_change_state), (gst_stream_info_set_mute),
(gst_stream_info_get_property):
* gst/playback/gststreaminfo.h:
* gst/playback/gststreamselector.c: (gst_stream_selector_init),
(gst_stream_selector_get_linked_pad),
(gst_stream_selector_getcaps),
(gst_stream_selector_get_linked_pads),
(gst_stream_selector_request_new_pad), (gst_stream_selector_chain):
* gst/playback/gststreamselector.h:
Rough port of playbin. Needs some more work, but is mostly done,
and uses a few locks in important places, which should make stuff
like chain-switches clean. Still uses GST_STATE() in a few places,
which isn't all that good an idea, subtitles/elements disabled
because no elements to test with and thus probably broken, query
and event handling moved to GstBin, internal thread removed
alltogether because the pipeline does that for us now. Can play
Ogg/Vorbis files. Haven't tested anything else yet.
2005-05-12 15:22:05 +00:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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 "gstplaybasebin.h"
GST_DEBUG_CATEGORY_STATIC (gst_play_bin_debug);
#define GST_CAT_DEFAULT gst_play_bin_debug
#define GST_TYPE_PLAY_BIN (gst_play_bin_get_type())
#define GST_PLAY_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PLAY_BIN,GstPlayBin))
#define GST_PLAY_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PLAY_BIN,GstPlayBinClass))
#define GST_IS_PLAY_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PLAY_BIN))
#define GST_IS_PLAY_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PLAY_BIN))
#define VOLUME_MAX_DOUBLE 4.0
typedef struct _GstPlayBin GstPlayBin;
typedef struct _GstPlayBinClass GstPlayBinClass;
struct _GstPlayBin
{
GstPlayBaseBin parent;
/* the configurable elements */
GstElement *fakesink;
GstElement *audio_sink;
GstElement *video_sink;
GstElement *visualisation;
GstElement *volume_element;
GstElement *textoverlay_element;
gfloat volume;
/* these are the currently active sinks */
GList *sinks;
/* the last captured frame for snapshots */
GstBuffer *frame;
/* our cache for the sinks */
GHashTable *cache;
/* boolean to see if we're currently switching groups */
gboolean group_switch;
/* font description */
gchar *font_desc;
};
struct _GstPlayBinClass
{
GstPlayBaseBinClass parent_class;
};
/* props */
enum
{
ARG_0,
ARG_AUDIO_SINK,
ARG_VIDEO_SINK,
ARG_VIS_PLUGIN,
ARG_VOLUME,
ARG_FRAME,
ARG_FONT_DESC
};
/* signals */
enum
{
LAST_SIGNAL
};
static void gst_play_bin_class_init (GstPlayBinClass * klass);
static void gst_play_bin_init (GstPlayBin * play_bin);
static void gst_play_bin_dispose (GObject * object);
static void group_switch (GstPlayBaseBin * play_base_bin);
static void setup_sinks (GstPlayBaseBin * play_base_bin);
static void remove_sinks (GstPlayBin * play_bin);
static void gst_play_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * spec);
static void gst_play_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * spec);
static GstElementStateReturn gst_play_bin_change_state (GstElement * element);
static GstElementClass *parent_class;
//static guint gst_play_bin_signals[LAST_SIGNAL] = { 0 };
static GstElementDetails gst_play_bin_details = {
"Player Bin",
"Generic/Bin/Player",
"Autoplug and play media from an uri",
"Wim Taymans <wim@fluendo.com>"
};
static GType
gst_play_bin_get_type (void)
{
static GType gst_play_bin_type = 0;
if (!gst_play_bin_type) {
static const GTypeInfo gst_play_bin_info = {
sizeof (GstPlayBinClass),
NULL,
NULL,
(GClassInitFunc) gst_play_bin_class_init,
NULL,
NULL,
sizeof (GstPlayBin),
0,
(GInstanceInitFunc) gst_play_bin_init,
NULL
};
gst_play_bin_type = g_type_register_static (GST_TYPE_PLAY_BASE_BIN,
"GstPlayBin", &gst_play_bin_info, 0);
}
return gst_play_bin_type;
}
static void
gst_play_bin_class_init (GstPlayBinClass * klass)
{
GObjectClass *gobject_klass;
GstElementClass *gstelement_klass;
GstBinClass *gstbin_klass;
GstPlayBaseBinClass *playbasebin_klass;
gobject_klass = (GObjectClass *) klass;
gstelement_klass = (GstElementClass *) klass;
gstbin_klass = (GstBinClass *) klass;
playbasebin_klass = (GstPlayBaseBinClass *) klass;
parent_class = g_type_class_ref (gst_play_base_bin_get_type ());
gobject_klass->set_property = gst_play_bin_set_property;
gobject_klass->get_property = gst_play_bin_get_property;
g_object_class_install_property (gobject_klass, ARG_VIDEO_SINK,
g_param_spec_object ("video-sink", "Video Sink",
"the video output element to use (NULL = default sink)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, ARG_AUDIO_SINK,
g_param_spec_object ("audio-sink", "Audio Sink",
"the audio output element to use (NULL = default sink)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, ARG_VIS_PLUGIN,
g_param_spec_object ("vis-plugin", "Vis plugin",
"the visualization element to use (NULL = none)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, ARG_VOLUME,
g_param_spec_double ("volume", "volume", "volume",
0.0, VOLUME_MAX_DOUBLE, 1.0, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, ARG_FRAME,
g_param_spec_boxed ("frame", "Frame",
"The last frame (NULL = no video available)",
GST_TYPE_BUFFER, G_PARAM_READABLE));
g_object_class_install_property (gobject_klass, ARG_FONT_DESC,
g_param_spec_string ("subtitle-font-desc",
"Subtitle font description",
"Pango font description of font "
"to be used for subtitle rendering", NULL, G_PARAM_WRITABLE));
gobject_klass->dispose = GST_DEBUG_FUNCPTR (gst_play_bin_dispose);
gst_element_class_set_details (gstelement_klass, &gst_play_bin_details);
gstelement_klass->change_state =
GST_DEBUG_FUNCPTR (gst_play_bin_change_state);
playbasebin_klass->setup_output_pads = setup_sinks;
playbasebin_klass->group_switch = group_switch;
}
static void
gst_play_bin_init (GstPlayBin * play_bin)
{
play_bin->video_sink = NULL;
play_bin->audio_sink = NULL;
play_bin->visualisation = NULL;
play_bin->volume_element = NULL;
play_bin->textoverlay_element = NULL;
play_bin->volume = 1.0;
play_bin->sinks = NULL;
play_bin->frame = NULL;
play_bin->font_desc = NULL;
play_bin->cache = g_hash_table_new_full (g_str_hash, g_str_equal,
NULL, (GDestroyNotify) gst_object_unref);
play_bin->group_switch = FALSE;
}
static void
gst_play_bin_dispose (GObject * object)
{
GstPlayBin *play_bin;
play_bin = GST_PLAY_BIN (object);
if (play_bin->cache != NULL) {
remove_sinks (play_bin);
g_hash_table_destroy (play_bin->cache);
play_bin->cache = NULL;
}
if (play_bin->audio_sink != NULL) {
gst_object_unref (GST_OBJECT (play_bin->audio_sink));
play_bin->audio_sink = NULL;
}
if (play_bin->video_sink != NULL) {
gst_object_unref (GST_OBJECT (play_bin->video_sink));
play_bin->video_sink = NULL;
}
if (play_bin->visualisation != NULL) {
gst_object_unref (GST_OBJECT (play_bin->visualisation));
play_bin->visualisation = NULL;
}
g_free (play_bin->font_desc);
play_bin->font_desc = NULL;
if (G_OBJECT_CLASS (parent_class)->dispose) {
G_OBJECT_CLASS (parent_class)->dispose (object);
}
}
static void
gst_play_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstPlayBin *play_bin;
g_return_if_fail (GST_IS_PLAY_BIN (object));
play_bin = GST_PLAY_BIN (object);
switch (prop_id) {
case ARG_VIDEO_SINK:
if (play_bin->video_sink != NULL) {
gst_object_unref (GST_OBJECT (play_bin->video_sink));
}
play_bin->video_sink = g_value_get_object (value);
if (play_bin->video_sink != NULL) {
gst_object_ref (GST_OBJECT (play_bin->video_sink));
gst_object_sink (GST_OBJECT (play_bin->video_sink));
}
/* when changing the videosink, we just remove the
* video pipeline from the cache so that it will be
* regenerated with the new sink element */
g_hash_table_remove (play_bin->cache, "vbin");
break;
case ARG_AUDIO_SINK:
if (play_bin->audio_sink != NULL) {
gst_object_unref (GST_OBJECT (play_bin->audio_sink));
}
play_bin->audio_sink = g_value_get_object (value);
if (play_bin->audio_sink != NULL) {
gst_object_ref (GST_OBJECT (play_bin->audio_sink));
gst_object_sink (GST_OBJECT (play_bin->audio_sink));
}
g_hash_table_remove (play_bin->cache, "abin");
break;
case ARG_VIS_PLUGIN:
if (play_bin->visualisation != NULL) {
gst_object_unref (GST_OBJECT (play_bin->visualisation));
}
play_bin->visualisation = g_value_get_object (value);
if (play_bin->visualisation != NULL) {
gst_object_ref (GST_OBJECT (play_bin->visualisation));
gst_object_sink (GST_OBJECT (play_bin->visualisation));
}
break;
case ARG_VOLUME:
play_bin->volume = g_value_get_double (value);
if (play_bin->volume_element) {
g_object_set (G_OBJECT (play_bin->volume_element), "volume",
play_bin->volume, NULL);
}
break;
case ARG_FONT_DESC:
g_free (play_bin->font_desc);
play_bin->font_desc = g_strdup (g_value_get_string (value));
if (play_bin->textoverlay_element) {
g_object_set (G_OBJECT (play_bin->textoverlay_element),
"font-desc", g_value_get_string (value), NULL);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_play_bin_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstPlayBin *play_bin;
g_return_if_fail (GST_IS_PLAY_BIN (object));
play_bin = GST_PLAY_BIN (object);
switch (prop_id) {
case ARG_VIDEO_SINK:
g_value_set_object (value, play_bin->video_sink);
break;
case ARG_AUDIO_SINK:
g_value_set_object (value, play_bin->audio_sink);
break;
case ARG_VIS_PLUGIN:
g_value_set_object (value, play_bin->visualisation);
break;
case ARG_VOLUME:
g_value_set_double (value, play_bin->volume);
break;
case ARG_FRAME:
g_value_set_boxed (value, play_bin->frame);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* signal fired when the identity has received a new buffer. This is used for
* making screenshots.
*/
static void
handoff (GstElement * identity, GstBuffer * frame, gpointer data)
{
GstPlayBin *play_bin = GST_PLAY_BIN (data);
if (play_bin->frame) {
gst_buffer_unref (play_bin->frame);
}
play_bin->frame = gst_buffer_ref (frame);
}
/* make the element (bin) that contains the elements needed to perform
* video display. We connect a handoff signal to identity so that we
* can grab snapshots. Identity's sinkpad is ghosted to vbin.
*
* +-------------------------------------------------------------+
* | vbin |
* | +--------+ +----------+ +----------+ +---------+ |
* | |identity| |colorspace| |videoscale| |videosink| |
* | +-sink src-sink src-sink src-sink | |
* | | +---+----+ +----------+ +----------+ +---------+ |
* sink-+ | |
* +----------|--------------------------------------------------+
* handoff
*/
static GstElement *
gen_video_element (GstPlayBin * play_bin)
{
GstElement *element;
GstElement *conv;
//GstElement *scale;
GstElement *sink;
GstElement *identity;
GstPad *pad;
/* first see if we have it in the cache */
element = g_hash_table_lookup (play_bin->cache, "vbin");
if (element != NULL) {
return element;
}
element = gst_bin_new ("vbin");
identity = gst_element_factory_make ("identity", "id");
g_signal_connect (identity, "handoff", G_CALLBACK (handoff), play_bin);
conv = gst_element_factory_make ("ffmpegcolorspace", "vconv");
//scale = gst_element_factory_make ("videoscale", "vscale");
if (play_bin->video_sink) {
sink = play_bin->video_sink;
} else {
sink = gst_element_factory_make ("xvimagesink", "sink");
}
gst_object_ref (GST_OBJECT (sink));
g_hash_table_insert (play_bin->cache, "video_sink", sink);
gst_bin_add (GST_BIN (element), identity);
gst_bin_add (GST_BIN (element), conv);
//gst_bin_add (GST_BIN (element), scale);
gst_bin_add (GST_BIN (element), sink);
gst_element_link_pads (identity, "src", conv, "sink");
gst_element_link_pads (conv, "src", /*scale, "sink");
gst_element_link_pads (scale, "src", */ sink, "sink");
pad = gst_element_get_pad (identity, "sink");
gst_element_add_ghost_pad (element, pad, "sink");
g_object_unref (G_OBJECT (pad));
gst_element_set_state (element, GST_STATE_READY);
/* since we're gonna add it to a bin but don't want to lose it,
* we keep a reference. */
gst_object_ref (GST_OBJECT (element));
g_hash_table_insert (play_bin->cache, "vbin", element);
return element;
}
/* make an element for playback of video with subtitles embedded.
*
* +--------------------------------------------------+
* | tbin +-------------+ |
* | +-----+ | textoverlay | +------+ |
* | | csp | +--video_sink | | vbin | |
* video_sink-sink src+ +-text_sink src-sink | |
* | +-----+ | +-------------+ +------+ |
* text_sink-------------+ |
* +--------------------------------------------------+
*/
static GstElement *
gen_text_element (GstPlayBin * play_bin)
{
GstElement *element, *csp, *overlay, *vbin;
GstPad *pad;
overlay = gst_element_factory_make ("textoverlay", "overlay");
g_object_set (G_OBJECT (overlay),
"halign", "center", "valign", "bottom", NULL);
play_bin->textoverlay_element = overlay;
if (play_bin->font_desc) {
g_object_set (G_OBJECT (play_bin->textoverlay_element),
"font-desc", play_bin->font_desc, NULL);
}
vbin = gen_video_element (play_bin);
if (!overlay) {
g_warning ("No overlay (pango) element, subtitles disabled");
return vbin;
}
csp = gst_element_factory_make ("ffmpegcolorspace", "subtitlecsp");
element = gst_bin_new ("textbin");
gst_element_link_many (csp, overlay, vbin, NULL);
gst_bin_add_many (GST_BIN (element), csp, overlay, vbin, NULL);
pad = gst_element_get_pad (overlay, "text_sink");
gst_element_add_ghost_pad (element, pad, "text_sink");
g_object_unref (G_OBJECT (pad));
pad = gst_element_get_pad (csp, "sink");
gst_element_add_ghost_pad (element, pad, "sink");
g_object_unref (G_OBJECT (pad));
return element;
}
/* make the element (bin) that contains the elements needed to perform
* audio playback.
*
* +-------------------------------------------------------------+
* | abin |
* | +---------+ +----------+ +---------+ +---------+ |
* | |audioconv| |audioscale| | volume | |audiosink| |
* | +-sink src-sink src-sink src-sink | |
* | | +---------+ +----------+ +---------+ +---------+ |
* sink-+ |
* +-------------------------------------------------------------+
*
*/
static GstElement *
gen_audio_element (GstPlayBin * play_bin)
{
GstElement *element;
GstElement *conv;
GstElement *sink;
GstElement *volume;
GstElement *scale;
GstPad *pad;
element = g_hash_table_lookup (play_bin->cache, "abin");
if (element != NULL) {
return element;
}
element = gst_bin_new ("abin");
conv = gst_element_factory_make ("audioconvert", "aconv");
scale = gst_element_factory_make ("audioscale", "ascale");
volume = gst_element_factory_make ("volume", "volume");
g_object_set (G_OBJECT (volume), "volume", play_bin->volume, NULL);
play_bin->volume_element = volume;
if (play_bin->audio_sink) {
sink = play_bin->audio_sink;
} else {
sink = gst_element_factory_make ("alsasink", "sink");
play_bin->audio_sink = GST_ELEMENT (gst_object_ref (GST_OBJECT (sink)));
}
gst_object_ref (GST_OBJECT (sink));
g_hash_table_insert (play_bin->cache, "audio_sink", sink);
gst_bin_add (GST_BIN (element), conv);
//gst_bin_add (GST_BIN (element), scale);
//gst_bin_add (GST_BIN (element), volume);
gst_bin_add (GST_BIN (element), sink);
gst_element_link_pads (conv, "src", /*scale, "sink");
gst_element_link_pads (scale, "src", volume, "sink");
gst_element_link_pads (volume, "src", */ sink, "sink");
pad = gst_element_get_pad (conv, "sink");
gst_element_add_ghost_pad (element, pad, "sink");
g_object_unref (G_OBJECT (pad));
gst_element_set_state (element, GST_STATE_READY);
/* since we're gonna add it to a bin but don't want to lose it,
* we keep a reference. */
gst_object_ref (GST_OBJECT (element));
g_hash_table_insert (play_bin->cache, "abin", element);
return element;
}
/* make the element (bin) that contains the elements needed to perform
* visualisation ouput. The idea is to split the audio using tee, then
* sending the output to the regular audio bin and the other output to
* the vis plugin that transforms it into a video that is rendered with the
* normal video bin. The video bin is run in a thread to make sure it does
* not block the audio playback pipeline.
*
* +--------------------------------------------------------------------------+
* | visbin |
* | +------+ +----------------+ |
* | | tee | | abin ... | |
* | +-sink src-sink | |
* | | | | +----------------+ +-------------------+ |
* | | | | | vthread | |
* | | | | +---------+ +------+ +------+ | +--------------+ | |
* | | | | |audioconv| | vis | |vqueue| | | vbin ... | | |
* | | | src-sink src-sink src-sink src-sink | | |
* | | | | +---------+ +------+ +------+ | +--------------+ | |
* | | | | +-------------------+ |
* | | +------+ |
* sink-+ |
+--------------------------------------------------------------------------+
*/
static GstElement *
gen_vis_element (GstPlayBin * play_bin)
{
GstElement *element;
GstElement *tee;
GstElement *asink;
GstElement *vsink;
GstElement *conv;
GstElement *vis;
GstElement *vqueue;
GstElement *vthread;
GstPad *pad;
element = gst_bin_new ("visbin");
tee = gst_element_factory_make ("tee", "tee");
vqueue = gst_element_factory_make ("queue", "vqueue");
vthread = gst_element_factory_make ("thread", "vthread");
asink = gen_audio_element (play_bin);
vsink = gen_video_element (play_bin);
gst_bin_add (GST_BIN (element), asink);
gst_bin_add (GST_BIN (element), vqueue);
gst_bin_add (GST_BIN (vthread), vsink);
gst_bin_add (GST_BIN (element), vthread);
gst_bin_add (GST_BIN (element), tee);
conv = gst_element_factory_make ("audioconvert", "aconv");
if (play_bin->visualisation) {
gst_object_ref (GST_OBJECT (play_bin->visualisation));
vis = play_bin->visualisation;
} else {
vis = gst_element_factory_make ("goom", "vis");
}
gst_bin_add (GST_BIN (element), conv);
gst_bin_add (GST_BIN (element), vis);
gst_element_link_pads (conv, "src", vis, "sink");
gst_element_link_pads (vis, "src", vqueue, "sink");
gst_element_link_pads (vqueue, "src", vsink, "sink");
pad = gst_element_get_pad (asink, "sink");
gst_pad_link (gst_element_get_request_pad (tee, "src%d"), pad);
g_object_unref (G_OBJECT (pad));
pad = gst_element_get_pad (conv, "sink");
gst_pad_link (gst_element_get_request_pad (tee, "src%d"), pad);
g_object_unref (G_OBJECT (pad));
pad = gst_element_get_pad (tee, "sink");
gst_element_add_ghost_pad (element, pad, "sink");
g_object_unref (G_OBJECT (pad));
return element;
}
/* set for group switch */
static void
group_switch (GstPlayBaseBin * play_base_bin)
{
GST_PLAY_BIN (play_base_bin)->group_switch = TRUE;
}
/* get rid of all installed sinks */
static void
remove_sinks (GstPlayBin * play_bin)
{
GList *sinks;
GstObject *parent;
GstElement *element;
GST_DEBUG ("removesinks");
play_bin->group_switch = FALSE;
element = g_hash_table_lookup (play_bin->cache, "abin");
if (element != NULL) {
parent = gst_element_get_parent (element);
if (parent != NULL) {
/* we remove the element from the parent so that
* there is no unwanted state change when the parent
* is disposed */
gst_bin_remove (GST_BIN (parent), element);
g_object_unref (G_OBJECT (parent));
}
}
element = g_hash_table_lookup (play_bin->cache, "vbin");
if (element != NULL) {
parent = gst_element_get_parent (element);
if (parent != NULL) {
gst_bin_remove (GST_BIN (parent), element);
g_object_unref (G_OBJECT (parent));
}
}
for (sinks = play_bin->sinks; sinks; sinks = g_list_next (sinks)) {
GstElement *element = GST_ELEMENT (sinks->data);
GstPad *pad = gst_element_get_pad (element, "sink");
GST_LOG ("removing sink %p", element);
if (GST_PAD_PEER (pad))
gst_pad_unlink (GST_PAD_PEER (pad), pad);
g_object_unref (G_OBJECT (pad));
gst_bin_remove (GST_BIN (play_bin), element);
}
g_list_free (play_bin->sinks);
play_bin->sinks = NULL;
if (play_bin->frame) {
gst_buffer_unref (play_bin->frame);
play_bin->frame = NULL;
}
play_bin->textoverlay_element = NULL;
}
/* loop over the streams and set up the pipeline to play this
* media file. First we count the number of audio and video streams.
* If there is no video stream but there exists an audio stream,
* we install a visualisation pipeline.
*
* Also make sure to only connect the first audio and video pad. FIXME
* this should eventually be handled with a tuner interface so that
* one can switch the streams.
*/
static gboolean
add_sink (GstPlayBin * play_bin, GstElement * sink, GstPad * srcpad)
{
GstPad *sinkpad;
GstPadLinkReturn res;
GstElement *parent;
/* we found a sink for this stream, now try to install it */
sinkpad = gst_element_get_pad (sink, "sink");
res = gst_pad_link (srcpad, sinkpad);
g_object_unref (G_OBJECT (sinkpad));
parent = gst_pad_get_parent (srcpad);
GST_DEBUG ("Adding sink with state %d (parent: %d, peer: %d)\n",
GST_STATE (sink), GST_STATE (play_bin), GST_STATE (parent));
g_object_unref (G_OBJECT (parent));
/* try to link the pad of the sink to the stream */
if (res < 0) {
gchar *capsstr;
/* could not link this stream */
capsstr = gst_caps_to_string (gst_pad_get_caps (srcpad));
g_warning ("could not link %s", capsstr);
g_free (capsstr);
} else {
/* we got the sink succesfully linked, now keep the sink
* in out internal list */
play_bin->sinks = g_list_prepend (play_bin->sinks, sink);
gst_element_set_state (sink,
(GST_STATE (play_bin) == GST_STATE_PLAYING) ?
GST_STATE_PLAYING : GST_STATE_PAUSED);
gst_bin_add (GST_BIN (play_bin), sink);
}
return res;
}
static void
setup_sinks (GstPlayBaseBin * play_base_bin)
{
GstPlayBin *play_bin = GST_PLAY_BIN (play_base_bin);
GstPlayBaseGroup *group;
GList *streaminfo = NULL, *s;
gboolean need_vis = FALSE;
gboolean need_text = FALSE;
GstPad *textsrcpad = NULL, *textsinkpad = NULL, *pad;
GstElement *sink;
/* get rid of existing sinks */
if (play_bin->sinks) {
remove_sinks (play_bin);
}
GST_DEBUG ("setupsinks");
/* find out what to do */
group = play_base_bin->queued_groups->data;
if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads > 0 &&
group->type[GST_STREAM_TYPE_TEXT - 1].npads > 0) {
need_text = TRUE;
} else if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads == 0 &&
group->type[GST_STREAM_TYPE_AUDIO - 1].npads > 0 &&
play_bin->visualisation != NULL) {
need_vis = TRUE;
}
/* now actually connect everything */
g_object_get (G_OBJECT (play_base_bin), "stream-info", &streaminfo, NULL);
for (s = streaminfo; s; s = g_list_next (s)) {
GObject *obj = G_OBJECT (s->data);
gint type;
GstObject *object;
g_object_get (obj, "type", &type, NULL);
g_object_get (obj, "object", &object, NULL);
}
/* link audio */
if (group->type[GST_STREAM_TYPE_AUDIO - 1].npads > 0) {
if (need_vis) {
sink = gen_vis_element (play_bin);
} else {
sink = gen_audio_element (play_bin);
}
pad = gst_element_get_pad (group->type[GST_STREAM_TYPE_AUDIO - 1].preroll,
"src");
add_sink (play_bin, sink, pad);
g_object_unref (G_OBJECT (pad));
}
/* link video */
if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads > 0) {
if (need_text) {
sink = gen_text_element (play_bin);
textsinkpad = gst_element_get_pad (sink, "text_sink");
textsrcpad =
gst_element_get_pad (group->type[GST_STREAM_TYPE_TEXT - 1].preroll,
"src");
gst_pad_link (textsrcpad, textsinkpad);
g_object_unref (G_OBJECT (textsinkpad));
g_object_unref (G_OBJECT (textsrcpad));
} else {
sink = gen_video_element (play_bin);
}
pad = gst_element_get_pad (group->type[GST_STREAM_TYPE_VIDEO - 1].preroll,
"src");
add_sink (play_bin, sink, pad);
g_object_unref (G_OBJECT (pad));
}
if (play_bin->fakesink) {
gst_bin_remove (GST_BIN (play_bin), play_bin->fakesink);
play_bin->fakesink = NULL;
}
}
static GstElementStateReturn
gst_play_bin_change_state (GstElement * element)
{
GstElementStateReturn ret;
GstPlayBin *play_bin;
int transition;
play_bin = GST_PLAY_BIN (element);
transition = GST_STATE_TRANSITION (element);
switch (transition) {
case GST_STATE_READY_TO_PAUSED:
if (!play_bin->fakesink) {
play_bin->fakesink = gst_element_factory_make ("fakesink", "test");
gst_bin_add (GST_BIN (play_bin), play_bin->fakesink);
}
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
if (ret == GST_STATE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_PLAYING_TO_PAUSED:
/* Set audio sink state to NULL to release the sound device,
* but only if we own it (else we might be in chain-transition). */
//if (play_bin->audio_sink != NULL && !play_bin->group_switch &&
// GST_STATE (play_bin->audio_sink) == GST_STATE_PAUSED) {
// gst_element_set_state (play_bin->audio_sink, GST_STATE_NULL);
//}
break;
case GST_STATE_PAUSED_TO_READY:
/* Check for NULL because the state transition may be done by
* gst_bin_dispose which is called by gst_play_bin_dispose, and in that
* case, we don't want to run remove_sinks.
* FIXME: should the NULL test be done in remove_sinks? Should we just
* set the state to NULL in gst_play_bin_dispose?
*/
if (play_bin->cache != NULL) {
remove_sinks (play_bin);
}
if (play_bin->fakesink) {
gst_bin_remove (GST_BIN (play_bin), play_bin->fakesink);
play_bin->fakesink = NULL;
}
break;
default:
break;
}
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_play_bin_debug, "playbin", 0, "play bin");
return gst_element_register (plugin, "playbin", GST_RANK_NONE,
GST_TYPE_PLAY_BIN);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"playbin",
"player bin", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)
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