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gstreamer/gst/playback/gstplaybin.c
Wim Taymans 8ad81db4b8 gst/playback/gstplaybin.c: Update vis bin docs. 
Original commit message from CVS:
* gst/playback/gstplaybin.c: (gen_vis_element):
Update vis bin docs.
Move queue after tee so we don't queue video buffers but
audio samples instead. Fixes problems where the video queue
is filled and the audio queue empty.
2006-02-13 15:59:48 +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 <gst/gst-i18n-plugin.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
#ifndef GST_HAVE_GLIB_2_8
#define _gst_gvalue_set_gstobject(gvalue,obj) \
if (obj != NULL) { \
gst_object_ref (obj); \
g_value_set_object (gvalue, obj); \
g_object_unref (obj); \
} else { \
g_value_set_object (gvalue, NULL); \
}
#else
#define _gst_gvalue_set_gstobject(gvalue,obj) \
g_value_set_object (gvalue, obj);
#endif
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 *pending_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;
/* 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 gboolean setup_sinks (GstPlayBaseBin * play_base_bin,
GstPlayBaseGroup * group);
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 gboolean gst_play_bin_send_event (GstElement * element,
GstEvent * event);
static GstStateChangeReturn gst_play_bin_change_state (GstElement * element,
GstStateChange transition);
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,
gst_param_spec_mini_object ("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);
gstelement_klass->send_event = GST_DEBUG_FUNCPTR (gst_play_bin_send_event);
playbasebin_klass->setup_output_pads = setup_sinks;
}
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->pending_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);
}
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_element_set_state (play_bin->audio_sink, GST_STATE_NULL);
gst_object_unref (play_bin->audio_sink);
play_bin->audio_sink = NULL;
}
if (play_bin->video_sink != NULL) {
gst_element_set_state (play_bin->video_sink, GST_STATE_NULL);
gst_object_unref (play_bin->video_sink);
play_bin->video_sink = NULL;
}
if (play_bin->visualisation != NULL) {
gst_element_set_state (play_bin->visualisation, GST_STATE_NULL);
gst_object_unref (play_bin->visualisation);
play_bin->visualisation = NULL;
}
if (play_bin->pending_visualisation != NULL) {
gst_element_set_state (play_bin->pending_visualisation, GST_STATE_NULL);
gst_object_unref (play_bin->pending_visualisation);
play_bin->pending_visualisation = NULL;
}
if (play_bin->textoverlay_element != NULL) {
gst_object_unref (play_bin->textoverlay_element);
play_bin->textoverlay_element = NULL;
}
g_free (play_bin->font_desc);
play_bin->font_desc = NULL;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_play_bin_vis_unblocked (GstPad * tee_pad, gboolean blocked,
gpointer user_data)
{
/* Unblocked */
}
static void
gst_play_bin_vis_blocked (GstPad * tee_pad, gboolean blocked,
gpointer user_data)
{
GstPlayBin *play_bin = GST_PLAY_BIN (user_data);
GstBin *vis_bin = NULL;
GstPad *vis_sink_pad = NULL, *vis_src_pad = NULL, *vqueue_pad = NULL;
GstState bin_state;
/* We want to disable visualisation */
if (!GST_IS_ELEMENT (play_bin->pending_visualisation)) {
/* Set visualisation element to READY */
gst_element_set_state (play_bin->visualisation, GST_STATE_READY);
goto beach;
}
vis_bin =
GST_BIN (gst_object_get_parent (GST_OBJECT (play_bin->visualisation)));
if (!GST_IS_BIN (vis_bin) || !GST_IS_PAD (tee_pad)) {
goto beach;
}
vis_src_pad = gst_element_get_pad (play_bin->visualisation, "src");
vis_sink_pad = gst_pad_get_peer (tee_pad);
/* Can be fakesink */
if (GST_IS_PAD (vis_src_pad)) {
vqueue_pad = gst_pad_get_peer (vis_src_pad);
}
if (!GST_IS_PAD (vis_sink_pad)) {
goto beach;
}
/* Check the bin's state */
GST_OBJECT_LOCK (vis_bin);
bin_state = GST_STATE (vis_bin);
GST_OBJECT_UNLOCK (vis_bin);
/* Unlink */
gst_pad_unlink (tee_pad, vis_sink_pad);
gst_object_unref (vis_sink_pad);
vis_sink_pad = NULL;
if (GST_IS_PAD (vqueue_pad)) {
gst_pad_unlink (vis_src_pad, vqueue_pad);
gst_object_unref (vis_src_pad);
vis_src_pad = NULL;
}
/* Remove from vis_bin */
gst_bin_remove (vis_bin, play_bin->visualisation);
/* Set state to NULL */
gst_element_set_state (play_bin->visualisation, GST_STATE_NULL);
/* And loose our ref */
gst_object_unref (play_bin->visualisation);
if (play_bin->pending_visualisation) {
/* Ref this new visualisation element before adding to the bin */
gst_object_ref (play_bin->pending_visualisation);
/* Add the new one */
gst_bin_add (vis_bin, play_bin->pending_visualisation);
/* Synchronizing state */
gst_element_set_state (play_bin->pending_visualisation, bin_state);
vis_sink_pad = gst_element_get_pad (play_bin->pending_visualisation,
"sink");
vis_src_pad = gst_element_get_pad (play_bin->pending_visualisation, "src");
if (!GST_IS_PAD (vis_sink_pad) || !GST_IS_PAD (vis_src_pad)) {
goto beach;
}
/* Link */
gst_pad_link (tee_pad, vis_sink_pad);
gst_pad_link (vis_src_pad, vqueue_pad);
}
/* We are done */
gst_object_unref (play_bin->visualisation);
play_bin->visualisation = play_bin->pending_visualisation;
play_bin->pending_visualisation = NULL;
beach:
if (vis_sink_pad) {
gst_object_unref (vis_sink_pad);
}
if (vis_src_pad) {
gst_object_unref (vis_src_pad);
}
if (vqueue_pad) {
gst_object_unref (vqueue_pad);
}
if (vis_bin) {
gst_object_unref (vis_bin);
}
/* Unblock the pad */
gst_pad_set_blocked_async (tee_pad, FALSE, gst_play_bin_vis_unblocked,
play_bin);
}
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 (play_bin->video_sink);
}
play_bin->video_sink = g_value_get_object (value);
if (play_bin->video_sink != NULL) {
gst_object_ref (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 (play_bin->audio_sink);
}
play_bin->audio_sink = g_value_get_object (value);
if (play_bin->audio_sink != NULL) {
gst_object_ref (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:
{
/* Do we already have a visualisation change pending ? */
if (play_bin->pending_visualisation) {
gst_object_unref (play_bin->pending_visualisation);
play_bin->pending_visualisation = g_value_get_object (value);
/* Take ownership */
if (play_bin->pending_visualisation) {
gst_object_ref (play_bin->pending_visualisation);
gst_object_sink (GST_OBJECT (play_bin->pending_visualisation));
}
} else {
play_bin->pending_visualisation = g_value_get_object (value);
/* Take ownership */
if (play_bin->pending_visualisation) {
gst_object_ref (play_bin->pending_visualisation);
gst_object_sink (GST_OBJECT (play_bin->pending_visualisation));
}
/* Was there a visualisation already set ? */
if (play_bin->visualisation != NULL) {
GstBin *vis_bin = NULL;
vis_bin =
GST_BIN (gst_object_get_parent (GST_OBJECT (play_bin->
visualisation)));
/* Check if the visualisation is already in a bin */
if (GST_IS_BIN (vis_bin)) {
GstPad *vis_sink_pad = NULL, *tee_pad = NULL;
/* Now get tee pad and block it async */
vis_sink_pad = gst_element_get_pad (play_bin->visualisation,
"sink");
if (!GST_IS_PAD (vis_sink_pad)) {
goto beach;
}
tee_pad = gst_pad_get_peer (vis_sink_pad);
if (!GST_IS_PAD (tee_pad)) {
goto beach;
}
/* Block with callback */
gst_pad_set_blocked_async (tee_pad, TRUE, gst_play_bin_vis_blocked,
play_bin);
beach:
if (vis_sink_pad) {
gst_object_unref (vis_sink_pad);
}
if (tee_pad) {
gst_object_unref (tee_pad);
}
gst_object_unref (vis_bin);
} else {
play_bin->visualisation = play_bin->pending_visualisation;
play_bin->pending_visualisation = NULL;
}
} else {
play_bin->visualisation = play_bin->pending_visualisation;
play_bin->pending_visualisation = NULL;
}
}
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:
_gst_gvalue_set_gstobject (value, play_bin->video_sink);
break;
case ARG_AUDIO_SINK:
_gst_gvalue_set_gstobject (value, play_bin->audio_sink);
break;
case ARG_VIS_PLUGIN:
_gst_gvalue_set_gstobject (value, play_bin->visualisation);
break;
case ARG_VOLUME:
g_value_set_double (value, play_bin->volume);
break;
case ARG_FRAME:
gst_value_set_mini_object (value, GST_MINI_OBJECT (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);
gst_mini_object_replace ((GstMiniObject **) & play_bin->frame,
GST_MINI_OBJECT_CAST (frame));
/* applications need to know the buffer caps,
* make sure they are always set on the frame */
if (GST_BUFFER_CAPS (play_bin->frame) == NULL) {
GstPad *pad;
if ((pad = gst_element_get_pad (identity, "sink"))) {
gst_buffer_set_caps (play_bin->frame, GST_PAD_CAPS (pad));
gst_object_unref (pad);
}
}
}
/* 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
*/
/* FIXME: this might return NULL if no videosink was found, handle
* this in callers */
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;
}
if (play_bin->video_sink) {
sink = play_bin->video_sink;
} else {
sink = gst_element_factory_make ("autovideosink", "videosink");
if (sink == NULL) {
sink = gst_element_factory_make ("xvimagesink", "videosink");
}
/* FIXME: this warrants adding a CORE error category for missing
* elements/plugins */
if (sink == NULL) {
GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
(_("Both autovideosink and xvimagesink elements are missing.")),
(NULL));
return NULL;
}
}
gst_object_ref (sink);
g_hash_table_insert (play_bin->cache, "video_sink", sink);
element = gst_bin_new ("vbin");
identity = gst_element_factory_make ("identity", "id");
g_object_set (identity, "silent", TRUE, NULL);
g_signal_connect (identity, "handoff", G_CALLBACK (handoff), play_bin);
conv = gst_element_factory_make ("ffmpegcolorspace", "vconv");
scale = gst_element_factory_make ("videoscale", "vscale");
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_pad (element, gst_ghost_pad_new ("sink", pad));
gst_object_unref (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 (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;
/* Create our bin */
element = gst_bin_new ("textbin");
/* Text overlay */
overlay = gst_element_factory_make ("textoverlay", "overlay");
/* Create the video rendering bin */
vbin = gen_video_element (play_bin);
/* If no overlay return the video bin */
if (!overlay) {
GST_WARNING ("No overlay (pango) element, subtitles disabled");
return vbin;
}
/* Set some parameters */
g_object_set (G_OBJECT (overlay),
"halign", "center", "valign", "bottom", NULL);
if (play_bin->font_desc) {
g_object_set (G_OBJECT (overlay), "font-desc", play_bin->font_desc, NULL);
}
/* Take a ref */
play_bin->textoverlay_element = GST_ELEMENT (gst_object_ref (overlay));
csp = gst_element_factory_make ("ffmpegcolorspace", "subtitlecsp");
/* Add our elements */
gst_bin_add_many (GST_BIN (element), csp, overlay, vbin, NULL);
/* Link */
gst_element_link_pads (csp, "src", overlay, "video_sink");
gst_element_link_pads (overlay, "src", vbin, "sink");
/* Add ghost pads on the subtitle bin */
pad = gst_element_get_pad (overlay, "text_sink");
gst_element_add_pad (element, gst_ghost_pad_new ("text_sink", pad));
gst_object_unref (pad);
pad = gst_element_get_pad (csp, "sink");
gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
/* Set state to READY */
gst_element_set_state (element, GST_STATE_READY);
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 ("autoaudiosink", "audiosink");
if (sink == NULL) {
sink = gst_element_factory_make ("alsasink", "audiosink");
}
if (sink == NULL) {
GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
(_("Both autoaudiosink and alsasink elements are missing.")), (NULL));
return NULL;
}
play_bin->audio_sink = GST_ELEMENT (gst_object_ref (sink));
}
gst_object_ref (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_pad (element, gst_ghost_pad_new ("sink", pad));
gst_object_unref (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 (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 | | aqueue | | abin ... | |
* | +-sink src-sink src-sink | |
* | | | | +--------+ +----------------+ |
* | | | | |
* | | | | +------+ +---------+ +------+ +-----------+ |
* | | | | |vqueue| |audioconv| | vis | | 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, *aqueue;
GstPad *pad, *rpad;
asink = gen_audio_element (play_bin);
if (!asink)
return NULL;
vsink = gen_video_element (play_bin);
if (!vsink) {
gst_object_unref (asink);
return NULL;
}
element = gst_bin_new ("visbin");
tee = gst_element_factory_make ("tee", "tee");
vqueue = gst_element_factory_make ("queue", "vqueue");
aqueue = gst_element_factory_make ("queue", "aqueue");
gst_bin_add (GST_BIN (element), asink);
gst_bin_add (GST_BIN (element), vqueue);
gst_bin_add (GST_BIN (element), aqueue);
gst_bin_add (GST_BIN (element), vsink);
gst_bin_add (GST_BIN (element), tee);
conv = gst_element_factory_make ("audioconvert", "aconv");
if (play_bin->visualisation) {
gst_object_ref (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 (vqueue, "src", conv, "sink");
gst_element_link_pads (conv, "src", vis, "sink");
gst_element_link_pads (vis, "src", vsink, "sink");
pad = gst_element_get_pad (aqueue, "sink");
rpad = gst_element_get_request_pad (tee, "src%d");
gst_pad_link (rpad, pad);
gst_object_unref (rpad);
gst_object_unref (pad);
gst_element_link_pads (aqueue, "src", asink, "sink");
pad = gst_element_get_pad (vqueue, "sink");
rpad = gst_element_get_request_pad (tee, "src%d");
gst_pad_link (rpad, pad);
gst_object_unref (rpad);
gst_object_unref (pad);
pad = gst_element_get_pad (tee, "sink");
gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
return element;
}
/* get rid of all installed sinks */
static void
remove_sinks (GstPlayBin * play_bin)
{
GList *sinks;
GstObject *parent;
GstElement *element;
GstPad *pad, *peer;
GST_DEBUG ("removesinks");
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 */
play_bin->sinks = g_list_remove (play_bin->sinks, element);
gst_element_set_state (element, GST_STATE_NULL);
gst_bin_remove (GST_BIN (parent), element);
gst_object_unref (parent);
}
pad = gst_element_get_pad (element, "sink");
if (pad != NULL) {
peer = gst_pad_get_peer (pad);
if (peer != NULL) {
gst_pad_unlink (peer, pad);
gst_object_unref (peer);
}
gst_object_unref (pad);
}
}
element = g_hash_table_lookup (play_bin->cache, "vbin");
if (element != NULL) {
parent = gst_element_get_parent (element);
if (parent != NULL) {
play_bin->sinks = g_list_remove (play_bin->sinks, element);
gst_element_set_state (element, GST_STATE_NULL);
gst_bin_remove (GST_BIN (parent), element);
gst_object_unref (parent);
}
pad = gst_element_get_pad (element, "sink");
if (pad != NULL) {
peer = gst_pad_get_peer (pad);
if (peer != NULL) {
gst_pad_unlink (peer, pad);
gst_object_unref (peer);
}
gst_object_unref (pad);
}
}
for (sinks = play_bin->sinks; sinks; sinks = g_list_next (sinks)) {
GstElement *element = GST_ELEMENT (sinks->data);
GstPad *pad;
GstPad *peer;
pad = gst_element_get_pad (element, "sink");
GST_LOG ("removing sink %p", element);
peer = gst_pad_get_peer (pad);
if (peer) {
gst_pad_unlink (peer, pad);
gst_object_unref (peer);
}
gst_object_unref (pad);
gst_element_set_state (element, GST_STATE_NULL);
gst_bin_remove (GST_BIN (play_bin), element);
}
g_list_free (play_bin->sinks);
play_bin->sinks = NULL;
/* FIXME: this is probably some refcounting problem */
if (play_bin->visualisation && GST_OBJECT_PARENT (play_bin->visualisation)) {
gst_element_set_state (play_bin->visualisation, GST_STATE_NULL);
gst_bin_remove (GST_BIN (GST_OBJECT_PARENT (play_bin->visualisation)),
play_bin->visualisation);
}
if (play_bin->frame) {
gst_buffer_unref (play_bin->frame);
play_bin->frame = NULL;
}
if (play_bin->textoverlay_element) {
gst_object_unref (play_bin->textoverlay_element);
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 * subtitle_pad)
{
GstPad *sinkpad;
GstPadLinkReturn linkres;
GstElement *parent;
GstStateChangeReturn stateret;
g_return_val_if_fail (sink != NULL, FALSE);
/* this is only for debugging */
parent = gst_pad_get_parent_element (srcpad);
if (parent) {
GST_DEBUG ("Adding sink with state %d (parent: %d, peer: %d)",
GST_STATE (sink), GST_STATE (play_bin), GST_STATE (parent));
gst_object_unref (parent);
}
/* bring it to the PAUSED state so we can link to the peer without
* breaking the flow */
if ((stateret = gst_element_set_state (sink, GST_STATE_PAUSED)) ==
GST_STATE_CHANGE_FAILURE)
goto state_failed;
gst_bin_add (GST_BIN (play_bin), sink);
/* we found a sink for this stream, now try to install it */
sinkpad = gst_element_get_pad (sink, "sink");
linkres = gst_pad_link (srcpad, sinkpad);
gst_object_unref (sinkpad);
/* try to link the pad of the sink to the stream */
if (GST_PAD_LINK_FAILED (linkres))
goto link_failed;
if (GST_IS_PAD (subtitle_pad)) {
sinkpad = gst_element_get_pad (sink, "text_sink");
linkres = gst_pad_link (subtitle_pad, sinkpad);
gst_object_unref (sinkpad);
}
/* try to link the subtitle pad of the sink to the stream */
if (GST_PAD_LINK_FAILED (linkres)) {
goto subtitle_failed;
}
/* we got the sink succesfully linked, now keep the sink
* in our internal list */
play_bin->sinks = g_list_prepend (play_bin->sinks, sink);
return TRUE;
/* ERRORS */
state_failed:
{
GST_DEBUG_OBJECT (play_bin, "state change failure when adding sink");
return FALSE;
}
link_failed:
{
gchar *capsstr;
GstCaps *caps;
/* could not link this stream */
caps = gst_pad_get_caps (srcpad);
capsstr = gst_caps_to_string (caps);
g_warning ("could not link %s: %d", capsstr, linkres);
GST_DEBUG_OBJECT (play_bin,
"link failed when adding sink, caps %s, reason %d", capsstr, linkres);
g_free (capsstr);
g_free (caps);
gst_element_set_state (sink, GST_STATE_NULL);
gst_bin_remove (GST_BIN (play_bin), sink);
return FALSE;
}
subtitle_failed:
{
gchar *capsstr;
GstCaps *caps;
/* could not link this stream */
caps = gst_pad_get_caps (subtitle_pad);
capsstr = gst_caps_to_string (caps);
GST_DEBUG_OBJECT (play_bin,
"subtitle link failed when adding sink, caps %s, reason %d", capsstr,
linkres);
g_free (capsstr);
g_free (caps);
return TRUE;
}
}
static gboolean
setup_sinks (GstPlayBaseBin * play_base_bin, GstPlayBaseGroup * group)
{
GstPlayBin *play_bin = GST_PLAY_BIN (play_base_bin);
GList *streaminfo = NULL, *s;
gboolean need_vis = FALSE;
gboolean need_text = FALSE;
GstPad *textsrcpad = NULL, *pad = NULL;
GstElement *sink;
gboolean res = TRUE;
/* get rid of existing sinks */
if (play_bin->sinks) {
remove_sinks (play_bin);
}
GST_DEBUG_OBJECT (play_base_bin, "setupsinks");
/* find out what to do */
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);
}
if (!sink)
return FALSE;
pad = gst_element_get_pad (group->type[GST_STREAM_TYPE_AUDIO - 1].preroll,
"src");
res = add_sink (play_bin, sink, pad, NULL);
gst_object_unref (pad);
}
/* link video */
if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads > 0) {
if (need_text) {
GstObject *parent = NULL, *grandparent = NULL;
GstPad *ghost = NULL;
sink = gen_text_element (play_bin);
textsrcpad =
gst_element_get_pad (group->type[GST_STREAM_TYPE_TEXT - 1].preroll,
"src");
/* This pad is from subtitle-bin, we need to create a ghost pad to have
common grandparents */
parent = gst_object_get_parent (GST_OBJECT (textsrcpad));
if (!parent) {
GST_WARNING_OBJECT (textsrcpad, "subtitle pad has no parent !");
gst_object_unref (textsrcpad);
textsrcpad = NULL;
goto beach;
}
grandparent = gst_object_get_parent (parent);
if (!grandparent) {
GST_WARNING_OBJECT (textsrcpad, "subtitle pad has no grandparent !");
gst_object_unref (parent);
gst_object_unref (textsrcpad);
textsrcpad = NULL;
goto beach;
}
ghost = gst_ghost_pad_new ("text_src", textsrcpad);
if (!GST_IS_PAD (ghost)) {
GST_WARNING_OBJECT (textsrcpad, "failed creating ghost pad for "
"subtitle-bin");
gst_object_unref (parent);
gst_object_unref (grandparent);
gst_object_unref (textsrcpad);
textsrcpad = NULL;
goto beach;
}
if (gst_element_add_pad (GST_ELEMENT (grandparent), ghost)) {
gst_object_unref (textsrcpad);
textsrcpad = ghost;
} else {
GST_WARNING_OBJECT (ghost, "failed adding ghost pad on subtitle-bin");
gst_object_unref (ghost);
gst_object_unref (textsrcpad);
textsrcpad = NULL;
}
gst_object_unref (parent);
gst_object_unref (grandparent);
} else {
sink = gen_video_element (play_bin);
}
beach:
if (!sink)
return FALSE;
pad = gst_element_get_pad (group->type[GST_STREAM_TYPE_VIDEO - 1].preroll,
"src");
res = add_sink (play_bin, sink, pad, textsrcpad);
gst_object_unref (pad);
}
/* remove the sinks now, pipeline get_state will now wait for the
* sinks to preroll */
if (play_bin->fakesink) {
gst_element_set_state (play_bin->fakesink, GST_STATE_NULL);
gst_bin_remove (GST_BIN (play_bin), play_bin->fakesink);
play_bin->fakesink = NULL;
}
return res;
}
/* 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_bin_send_event_to_sink (GstPlayBin * play_bin, GstEvent * event)
{
GList *sinks = play_bin->sinks;
gboolean res = TRUE;
while (sinks) {
GstElement *sink = GST_ELEMENT_CAST (sinks->data);
gst_event_ref (event);
if ((res = gst_element_send_event (sink, event)))
break;
sinks = g_list_next (sinks);
}
gst_event_unref (event);
return res;
}
static gboolean
do_playbin_seek (GstElement * element, GstEvent * event)
{
gdouble rate;
GstSeekFlags flags;
gboolean flush;
gboolean was_playing = FALSE;
gboolean res;
gst_event_parse_seek (event, &rate, NULL, &flags, NULL, NULL, NULL, NULL);
flush = flags & GST_SEEK_FLAG_FLUSH;
if (flush) {
GstState state;
/* need to call _get_state() since a bin state is only updated
* with this call. */
gst_element_get_state (element, &state, NULL, 0);
was_playing = state == GST_STATE_PLAYING;
if (was_playing) {
gst_element_set_state (element, GST_STATE_PAUSED);
}
}
res = gst_play_bin_send_event_to_sink (GST_PLAY_BIN (element), event);
if (flush && res) {
/* need to reset the stream time to 0 after a flushing seek */
gst_pipeline_set_new_stream_time (GST_PIPELINE (element), 0);
if (was_playing)
/* and continue playing */
gst_element_set_state (element, GST_STATE_PLAYING);
}
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_bin_send_event (GstElement * element, GstEvent * event)
{
gboolean res = FALSE;
GstEventType event_type = GST_EVENT_TYPE (event);
switch (event_type) {
case GST_EVENT_SEEK:
res = do_playbin_seek (element, event);
break;
default:
res = gst_play_bin_send_event_to_sink (GST_PLAY_BIN (element), event);
break;
}
return res;
}
static GstStateChangeReturn
gst_play_bin_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstPlayBin *play_bin;
play_bin = GST_PLAY_BIN (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
/* this really is the easiest way to make the state change return
* ASYNC until we added the sinks */
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, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_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 &&
// GST_STATE (play_bin->audio_sink) == GST_STATE_PAUSED) {
// gst_element_set_state (play_bin->audio_sink, GST_STATE_NULL);
//}
break;
case GST_STATE_CHANGE_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_element_set_state (play_bin->fakesink, GST_STATE_NULL);
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");
#ifdef ENABLE_NLS
GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
LOCALEDIR);
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
#endif /* ENABLE_NLS */
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_NAME,
GST_PACKAGE_ORIGIN)
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