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gstreamer/subprojects/gst-plugins-base/gst/playback/gsturidecodebin.c
Thibault Saunier 4067bbdd91 uridecodebin: Set source element to READY before querying it 
Generating the source element is done when uridecodebin is doing the
READY to PAUSED state change, so it is reasonable to set the new source
element to that state.

This also allows detecting early failures with backing libraries or
hardware (checks done in NULL->READY).

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3857>
2023-02-08 11:07:21 +00:00

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/* GStreamer
* Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-uridecodebin
* @title: uridecodebin
*
* Decodes data from a URI into raw media. It selects a source element that can
* handle the given #GstURIDecodeBin:uri scheme and connects it to a decodebin.
*/
/* FIXME 0.11: suppress warnings for deprecated API such as GValueArray
* with newer GLib versions (>= 2.31.0) */
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <gst/gst.h>
#include <glib/gi18n-lib.h>
#include <gst/pbutils/missing-plugins.h>
#include "gstplay-enum.h"
#include "gstrawcaps.h"
#include "gstplaybackelements.h"
#include "gstplaybackutils.h"
#define GST_TYPE_URI_DECODE_BIN \
(gst_uri_decode_bin_get_type())
#define GST_URI_DECODE_BIN(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_URI_DECODE_BIN,GstURIDecodeBin))
#define GST_URI_DECODE_BIN_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_URI_DECODE_BIN,GstURIDecodeBinClass))
#define GST_IS_URI_DECODE_BIN(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_URI_DECODE_BIN))
#define GST_IS_URI_DECODE_BIN_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_URI_DECODE_BIN))
#define GST_URI_DECODE_BIN_CAST(obj) ((GstURIDecodeBin *) (obj))
typedef struct _GstURIDecodeBin GstURIDecodeBin;
typedef struct _GstURIDecodeBinClass GstURIDecodeBinClass;
#define GST_URI_DECODE_BIN_LOCK(dec) (g_mutex_lock(&((GstURIDecodeBin*)(dec))->lock))
#define GST_URI_DECODE_BIN_UNLOCK(dec) (g_mutex_unlock(&((GstURIDecodeBin*)(dec))->lock))
typedef struct _GstURIDecodeBinStream
{
gulong probe_id;
guint bitrate;
} GstURIDecodeBinStream;
/**
* GstURIDecodeBin
*
* uridecodebin element struct
*/
struct _GstURIDecodeBin
{
GstBin parent_instance;
GMutex lock; /* lock for constructing */
GMutex factories_lock;
guint32 factories_cookie;
GList *factories; /* factories we can use for selecting elements */
gchar *uri;
guint64 connection_speed;
GstCaps *caps;
gchar *encoding;
gboolean is_stream;
gboolean is_adaptive;
gboolean need_queue;
guint64 buffer_duration; /* When buffering, buffer duration (ns) */
guint buffer_size; /* When buffering, buffer size (bytes) */
gboolean download;
gboolean use_buffering;
gboolean force_sw_decoders;
GstElement *source;
GstElement *queue;
GstElement *typefind;
guint have_type_id; /* have-type signal id from typefind */
/* without holding ref */
GSList *decodebins;
/* Holding strong reference to decodebin */
GSList *pending_decodebins;
GHashTable *streams;
guint numpads;
/* for dynamic sources */
guint src_np_sig_id; /* new-pad signal id */
guint src_nmp_sig_id; /* no-more-pads signal id */
gint pending;
GList *missing_plugin_errors;
gboolean async_pending; /* async-start has been emitted */
gboolean expose_allstreams; /* Whether to expose unknown type streams or not */
guint64 ring_buffer_max_size; /* 0 means disabled */
gboolean post_stream_topology;
};
struct _GstURIDecodeBinClass
{
GstBinClass parent_class;
/* signal fired when we found a pad that we cannot decode */
void (*unknown_type) (GstElement * element, GstPad * pad, GstCaps * caps);
/* signal fired to know if we continue trying to decode the given caps */
gboolean (*autoplug_continue) (GstElement * element, GstPad * pad,
GstCaps * caps);
/* signal fired to get a list of factories to try to autoplug */
GValueArray *(*autoplug_factories) (GstElement * element, GstPad * pad,
GstCaps * caps);
/* signal fired to sort the factories */
GValueArray *(*autoplug_sort) (GstElement * element, GstPad * pad,
GstCaps * caps, GValueArray * factories);
/* signal fired to select from the proposed list of factories */
GstAutoplugSelectResult (*autoplug_select) (GstElement * element,
GstPad * pad, GstCaps * caps, GstElementFactory * factory);
/* signal fired when a autoplugged element that is not linked downstream
* or exposed wants to query something */
gboolean (*autoplug_query) (GstElement * element, GstPad * pad,
GstQuery * query);
/* emitted when all data is decoded */
void (*drained) (GstElement * element);
};
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStaticCaps default_raw_caps = GST_STATIC_CAPS (DEFAULT_RAW_CAPS);
GST_DEBUG_CATEGORY_STATIC (gst_uri_decode_bin_debug);
#define GST_CAT_DEFAULT gst_uri_decode_bin_debug
/* signals */
enum
{
SIGNAL_UNKNOWN_TYPE,
SIGNAL_AUTOPLUG_CONTINUE,
SIGNAL_AUTOPLUG_FACTORIES,
SIGNAL_AUTOPLUG_SELECT,
SIGNAL_AUTOPLUG_SORT,
SIGNAL_AUTOPLUG_QUERY,
SIGNAL_DRAINED,
SIGNAL_SOURCE_SETUP,
LAST_SIGNAL
};
/* properties */
#define DEFAULT_PROP_URI NULL
#define DEFAULT_PROP_SOURCE NULL
#define DEFAULT_CONNECTION_SPEED 0
#define DEFAULT_CAPS (gst_static_caps_get (&default_raw_caps))
#define DEFAULT_SUBTITLE_ENCODING NULL
#define DEFAULT_BUFFER_DURATION -1
#define DEFAULT_BUFFER_SIZE -1
#define DEFAULT_DOWNLOAD FALSE
#define DEFAULT_USE_BUFFERING FALSE
#define DEFAULT_FORCE_SW_DECODERS FALSE
#define DEFAULT_EXPOSE_ALL_STREAMS TRUE
#define DEFAULT_RING_BUFFER_MAX_SIZE 0
#define DEFAULT_POST_STREAM_TOPOLOGY FALSE
enum
{
PROP_0,
PROP_URI,
PROP_SOURCE,
PROP_CONNECTION_SPEED,
PROP_CAPS,
PROP_SUBTITLE_ENCODING,
PROP_BUFFER_SIZE,
PROP_BUFFER_DURATION,
PROP_DOWNLOAD,
PROP_USE_BUFFERING,
PROP_FORCE_SW_DECODERS,
PROP_EXPOSE_ALL_STREAMS,
PROP_RING_BUFFER_MAX_SIZE,
PROP_POST_STREAM_TOPOLOGY
};
static guint gst_uri_decode_bin_signals[LAST_SIGNAL] = { 0 };
GType gst_uri_decode_bin_get_type (void);
#define gst_uri_decode_bin_parent_class parent_class
G_DEFINE_TYPE (GstURIDecodeBin, gst_uri_decode_bin, GST_TYPE_BIN);
#define _do_init \
GST_DEBUG_CATEGORY_INIT (gst_uri_decode_bin_debug, "uridecodebin", 0, "URI decoder element"); \
playback_element_init (plugin);
GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (uridecodebin, "uridecodebin",
GST_RANK_NONE, GST_TYPE_URI_DECODE_BIN, _do_init);
static void remove_decoders (GstURIDecodeBin * bin, gboolean force);
static void gst_uri_decode_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_uri_decode_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_uri_decode_bin_finalize (GObject * obj);
static void handle_message (GstBin * bin, GstMessage * msg);
static gboolean gst_uri_decode_bin_query (GstElement * element,
GstQuery * query);
static GstStateChangeReturn gst_uri_decode_bin_change_state (GstElement *
element, GstStateChange transition);
static gboolean
_gst_boolean_accumulator (GSignalInvocationHint * ihint,
GValue * return_accu, const GValue * handler_return, gpointer dummy)
{
gboolean myboolean;
myboolean = g_value_get_boolean (handler_return);
g_value_set_boolean (return_accu, myboolean);
/* stop emission if FALSE */
return myboolean;
}
static gboolean
_gst_boolean_or_accumulator (GSignalInvocationHint * ihint,
GValue * return_accu, const GValue * handler_return, gpointer dummy)
{
gboolean myboolean;
gboolean retboolean;
myboolean = g_value_get_boolean (handler_return);
retboolean = g_value_get_boolean (return_accu);
g_value_set_boolean (return_accu, myboolean || retboolean);
return TRUE;
}
static gboolean
_gst_array_accumulator (GSignalInvocationHint * ihint,
GValue * return_accu, const GValue * handler_return, gpointer dummy)
{
gpointer array;
array = g_value_get_boxed (handler_return);
g_value_set_boxed (return_accu, array);
return FALSE;
}
static gboolean
_gst_select_accumulator (GSignalInvocationHint * ihint,
GValue * return_accu, const GValue * handler_return, gpointer dummy)
{
GstAutoplugSelectResult res;
res = g_value_get_enum (handler_return);
g_value_set_enum (return_accu, res);
/* Call the next handler in the chain (if any) when the current callback
* returns TRY. This makes it possible to register separate autoplug-select
* handlers that implement different TRY/EXPOSE/SKIP strategies.
*/
if (res == GST_AUTOPLUG_SELECT_TRY)
return TRUE;
return FALSE;
}
static gboolean
_gst_array_hasvalue_accumulator (GSignalInvocationHint * ihint,
GValue * return_accu, const GValue * handler_return, gpointer dummy)
{
gpointer array;
array = g_value_get_boxed (handler_return);
g_value_set_boxed (return_accu, array);
if (array != NULL)
return FALSE;
return TRUE;
}
static gboolean
gst_uri_decode_bin_autoplug_continue (GstElement * element, GstPad * pad,
GstCaps * caps)
{
/* by default we always continue */
return TRUE;
}
/* Must be called with factories lock! */
static void
gst_uri_decode_bin_update_factories_list (GstURIDecodeBin * dec)
{
guint32 cookie;
GList *factories, *tmp;
cookie = gst_registry_get_feature_list_cookie (gst_registry_get ());
if (!dec->factories || dec->factories_cookie != cookie) {
if (dec->factories)
gst_plugin_feature_list_free (dec->factories);
factories =
gst_element_factory_list_get_elements
(GST_ELEMENT_FACTORY_TYPE_DECODABLE, GST_RANK_MARGINAL);
if (dec->force_sw_decoders) {
/* filter out Hardware class elements */
dec->factories = NULL;
for (tmp = factories; tmp; tmp = g_list_next (tmp)) {
GstElementFactory *factory = GST_ELEMENT_FACTORY_CAST (tmp->data);
if (!gst_element_factory_list_is_type (factory,
GST_ELEMENT_FACTORY_TYPE_HARDWARE)) {
dec->factories = g_list_prepend (dec->factories, factory);
} else {
gst_object_unref (factory);
}
}
g_list_free (factories);
} else {
dec->factories = factories;
}
dec->factories =
g_list_sort (dec->factories, gst_playback_utils_compare_factories_func);
dec->factories_cookie = cookie;
}
}
static GValueArray *
gst_uri_decode_bin_autoplug_factories (GstElement * element, GstPad * pad,
GstCaps * caps)
{
GList *list, *tmp;
GValueArray *result;
GstURIDecodeBin *dec = GST_URI_DECODE_BIN_CAST (element);
GST_DEBUG_OBJECT (element, "finding factories");
/* return all compatible factories for caps */
g_mutex_lock (&dec->factories_lock);
gst_uri_decode_bin_update_factories_list (dec);
list =
gst_element_factory_list_filter (dec->factories, caps, GST_PAD_SINK,
gst_caps_is_fixed (caps));
g_mutex_unlock (&dec->factories_lock);
result = g_value_array_new (g_list_length (list));
for (tmp = list; tmp; tmp = tmp->next) {
GstElementFactory *factory = GST_ELEMENT_FACTORY_CAST (tmp->data);
GValue val = { 0, };
g_value_init (&val, G_TYPE_OBJECT);
g_value_set_object (&val, factory);
g_value_array_append (result, &val);
g_value_unset (&val);
}
gst_plugin_feature_list_free (list);
GST_DEBUG_OBJECT (element, "autoplug-factories returns %p", result);
return result;
}
static GValueArray *
gst_uri_decode_bin_autoplug_sort (GstElement * element, GstPad * pad,
GstCaps * caps, GValueArray * factories)
{
return NULL;
}
static GstAutoplugSelectResult
gst_uri_decode_bin_autoplug_select (GstElement * element, GstPad * pad,
GstCaps * caps, GstElementFactory * factory)
{
GST_DEBUG_OBJECT (element, "default autoplug-select returns TRY");
/* Try factory. */
return GST_AUTOPLUG_SELECT_TRY;
}
static gboolean
gst_uri_decode_bin_autoplug_query (GstElement * element, GstPad * pad,
GstQuery * query)
{
/* No query handled here */
return FALSE;
}
static void
gst_uri_decode_bin_class_init (GstURIDecodeBinClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBinClass *gstbin_class;
gobject_class = G_OBJECT_CLASS (klass);
gstelement_class = GST_ELEMENT_CLASS (klass);
gstbin_class = GST_BIN_CLASS (klass);
gobject_class->set_property = gst_uri_decode_bin_set_property;
gobject_class->get_property = gst_uri_decode_bin_get_property;
gobject_class->finalize = gst_uri_decode_bin_finalize;
g_object_class_install_property (gobject_class, PROP_URI,
g_param_spec_string ("uri", "URI", "URI to decode",
DEFAULT_PROP_URI, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SOURCE,
g_param_spec_object ("source", "Source", "Source object used",
GST_TYPE_ELEMENT, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CONNECTION_SPEED,
g_param_spec_uint64 ("connection-speed", "Connection Speed",
"Network connection speed in kbps (0 = unknown)",
0, G_MAXUINT64 / 1000, DEFAULT_CONNECTION_SPEED,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CAPS,
g_param_spec_boxed ("caps", "Caps",
"The caps on which to stop decoding. (NULL = default)",
GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SUBTITLE_ENCODING,
g_param_spec_string ("subtitle-encoding", "subtitle encoding",
"Encoding to assume if input subtitles are not in UTF-8 encoding. "
"If not set, the GST_SUBTITLE_ENCODING environment variable will "
"be checked for an encoding to use. If that is not set either, "
"ISO-8859-15 will be assumed.", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BUFFER_SIZE,
g_param_spec_int ("buffer-size", "Buffer size (bytes)",
"Buffer size when buffering streams (-1 default value)",
-1, G_MAXINT, DEFAULT_BUFFER_SIZE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BUFFER_DURATION,
g_param_spec_int64 ("buffer-duration", "Buffer duration (ns)",
"Buffer duration when buffering streams (-1 default value)",
-1, G_MAXINT64, DEFAULT_BUFFER_DURATION,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstURIDecodeBin:download:
*
* For certain media type, enable download buffering.
*/
g_object_class_install_property (gobject_class, PROP_DOWNLOAD,
g_param_spec_boolean ("download", "Download",
"Attempt download buffering when buffering network streams",
DEFAULT_DOWNLOAD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstURIDecodeBin:use-buffering:
*
* Emit BUFFERING messages based on low-/high-percent thresholds of the
* demuxed or parsed data.
* When download buffering is activated and used for the current media
* type, this property does nothing. Otherwise perform buffering on the
* demuxed or parsed media.
*/
g_object_class_install_property (gobject_class, PROP_USE_BUFFERING,
g_param_spec_boolean ("use-buffering", "Use Buffering",
"Perform buffering on demuxed/parsed media",
DEFAULT_USE_BUFFERING, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstURIDecodeBin:force-sw-decoders:
*
* While auto-plugging, if set to %TRUE, those decoders within
* "Hardware" klass will be ignored. Otherwise they will be tried.
*
* Since: 1.18
*/
g_object_class_install_property (gobject_class, PROP_FORCE_SW_DECODERS,
g_param_spec_boolean ("force-sw-decoders", "Software Docoders Only",
"Use only sofware decoders to process streams",
DEFAULT_FORCE_SW_DECODERS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstURIDecodeBin:expose-all-streams:
*
* Expose streams of unknown type.
*
* If set to %FALSE, then only the streams that can be decoded to the final
* caps (see 'caps' property) will have a pad exposed. Streams that do not
* match those caps but could have been decoded will not have decoder plugged
* in internally and will not have a pad exposed.
*/
g_object_class_install_property (gobject_class, PROP_EXPOSE_ALL_STREAMS,
g_param_spec_boolean ("expose-all-streams", "Expose All Streams",
"Expose all streams, including those of unknown type or that don't match the 'caps' property",
DEFAULT_EXPOSE_ALL_STREAMS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstURIDecodeBin:ring-buffer-max-size:
*
* The maximum size of the ring buffer in kilobytes. If set to 0, the ring
* buffer is disabled. Default is 0.
*/
g_object_class_install_property (gobject_class, PROP_RING_BUFFER_MAX_SIZE,
g_param_spec_uint64 ("ring-buffer-max-size",
"Max. ring buffer size (bytes)",
"Max. amount of data in the ring buffer (bytes, 0 = ring buffer disabled)",
0, G_MAXUINT, DEFAULT_RING_BUFFER_MAX_SIZE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstURIDecodeBin:post-stream-topology
*
* Post stream-topology messages on the bus every time the topology changes.
*
* Since: 1.22
*/
g_object_class_install_property (gobject_class, PROP_POST_STREAM_TOPOLOGY,
g_param_spec_boolean ("post-stream-topology", "Post Stream Topology",
"Post stream-topology messages",
DEFAULT_POST_STREAM_TOPOLOGY,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstURIDecodeBin::unknown-type:
* @bin: The uridecodebin.
* @pad: the new pad containing caps that cannot be resolved to a 'final'.
* stream type.
* @caps: the #GstCaps of the pad that cannot be resolved.
*
* This signal is emitted when a pad for which there is no further possible
* decoding is added to the uridecodebin.
*/
gst_uri_decode_bin_signals[SIGNAL_UNKNOWN_TYPE] =
g_signal_new ("unknown-type", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass, unknown_type),
NULL, NULL, NULL, G_TYPE_NONE, 2, GST_TYPE_PAD, GST_TYPE_CAPS);
/**
* GstURIDecodeBin::autoplug-continue:
* @bin: The uridecodebin.
* @pad: The #GstPad.
* @caps: The #GstCaps found.
*
* This signal is emitted whenever uridecodebin finds a new stream. It is
* emitted before looking for any elements that can handle that stream.
*
* > Invocation of signal handlers stops after the first signal handler
* > returns %FALSE. Signal handlers are invoked in the order they were
* > connected in.
*
* Returns: %TRUE if you wish uridecodebin to look for elements that can
* handle the given @caps. If %FALSE, those caps will be considered as
* final and the pad will be exposed as such (see 'pad-added' signal of
* #GstElement).
*/
gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE] =
g_signal_new ("autoplug-continue", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass,
autoplug_continue), _gst_boolean_accumulator, NULL,
NULL, G_TYPE_BOOLEAN, 2, GST_TYPE_PAD, GST_TYPE_CAPS);
/**
* GstURIDecodeBin::autoplug-factories:
* @bin: The uridecodebin.
* @pad: The #GstPad.
* @caps: The #GstCaps found.
*
* This function is emitted when an array of possible factories for @caps on
* @pad is needed. Uridecodebin will by default return an array with all
* compatible factories, sorted by rank.
*
* If this function returns NULL, @pad will be exposed as a final caps.
*
* If this function returns an empty array, the pad will be considered as
* having an unhandled type media type.
*
* > Only the signal handler that is connected first will ever by invoked.
* > Don't connect signal handlers with the #G_CONNECT_AFTER flag to this
* > signal, they will never be invoked!
*
* Returns: a #GValueArray* with a list of factories to try. The factories are
* by default tried in the returned order or based on the index returned by
* "autoplug-select".
*/
gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES] =
g_signal_new ("autoplug-factories", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass,
autoplug_factories), _gst_array_accumulator, NULL,
NULL, G_TYPE_VALUE_ARRAY, 2, GST_TYPE_PAD, GST_TYPE_CAPS);
/**
* GstURIDecodeBin::autoplug-sort:
* @bin: The uridecodebin.
* @pad: The #GstPad.
* @caps: The #GstCaps.
* @factories: A #GValueArray of possible #GstElementFactory to use.
*
* Once decodebin has found the possible #GstElementFactory objects to try
* for @caps on @pad, this signal is emitted. The purpose of the signal is for
* the application to perform additional sorting or filtering on the element
* factory array.
*
* The callee should copy and modify @factories or return %NULL if the
* order should not change.
*
* > Invocation of signal handlers stops after one signal handler has
* > returned something else than %NULL. Signal handlers are invoked in
* > the order they were connected in.
* > Don't connect signal handlers with the #G_CONNECT_AFTER flag to this
* > signal, they will never be invoked!
*
* Returns: A new sorted array of #GstElementFactory objects.
*/
gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_SORT] =
g_signal_new ("autoplug-sort", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass, autoplug_sort),
_gst_array_hasvalue_accumulator, NULL,
NULL, G_TYPE_VALUE_ARRAY, 3, GST_TYPE_PAD, GST_TYPE_CAPS,
G_TYPE_VALUE_ARRAY | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* GstURIDecodeBin::autoplug-select:
* @bin: The uridecodebin.
* @pad: The #GstPad.
* @caps: The #GstCaps.
* @factory: A #GstElementFactory to use.
*
* This signal is emitted once uridecodebin has found all the possible
* #GstElementFactory that can be used to handle the given @caps. For each of
* those factories, this signal is emitted.
*
* The signal handler should return a #GstAutoplugSelectResult enum
* value indicating what decodebin should do next.
*
* A value of #GstAutoplugSelectResult::try will try to autoplug an element from
* @factory.
*
* A value of #GstAutoplugSelectResult::expose will expose @pad without plugging
* any element to it.
*
* A value of #GstAutoplugSelectResult::skip will skip @factory and move to the
* next factory.
*
* > The signal handler will not be invoked if any of the previously
* > registered signal handlers (if any) return a value other than
* > GST_AUTOPLUG_SELECT_TRY. Which also means that if you return
* > GST_AUTOPLUG_SELECT_TRY from one signal handler, handlers that get
* > registered next (again, if any) can override that decision.
*
* Returns: a #GstAutoplugSelectResult that indicates the required
* operation. The default handler will always return
* #GstAutoplugSelectResult::try.
*/
gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT] =
g_signal_new ("autoplug-select", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass,
autoplug_select), _gst_select_accumulator, NULL,
NULL, GST_TYPE_AUTOPLUG_SELECT_RESULT, 3, GST_TYPE_PAD, GST_TYPE_CAPS,
GST_TYPE_ELEMENT_FACTORY);
/**
* GstDecodeBin::autoplug-query:
* @bin: The decodebin.
* @child: The child element doing the query
* @pad: The #GstPad.
* @query: The #GstQuery.
*
* This signal is emitted whenever an autoplugged element that is
* not linked downstream yet and not exposed does a query. It can
* be used to tell the element about the downstream supported caps
* for example.
*
* Returns: %TRUE if the query was handled, %FALSE otherwise.
*/
gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_QUERY] =
g_signal_new ("autoplug-query", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass, autoplug_query),
_gst_boolean_or_accumulator, NULL, NULL, G_TYPE_BOOLEAN, 3, GST_TYPE_PAD,
GST_TYPE_ELEMENT, GST_TYPE_QUERY | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* GstURIDecodeBin::drained:
*
* This signal is emitted when the data for the current uri is played.
*/
gst_uri_decode_bin_signals[SIGNAL_DRAINED] =
g_signal_new ("drained", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstURIDecodeBinClass, drained), NULL, NULL, NULL,
G_TYPE_NONE, 0, G_TYPE_NONE);
/**
* GstURIDecodeBin::source-setup:
* @bin: the uridecodebin.
* @source: source element
*
* This signal is emitted after the source element has been created, so
* it can be configured by setting additional properties (e.g. set a
* proxy server for an http source, or set the device and read speed for
* an audio cd source). This is functionally equivalent to connecting to
* the notify::source signal, but more convenient.
*/
gst_uri_decode_bin_signals[SIGNAL_SOURCE_SETUP] =
g_signal_new ("source-setup", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 1, GST_TYPE_ELEMENT);
gst_element_class_add_static_pad_template (gstelement_class, &srctemplate);
gst_element_class_set_static_metadata (gstelement_class,
"URI Decoder", "Generic/Bin/Decoder",
"Autoplug and decode an URI to raw media",
"Wim Taymans <wim.taymans@gmail.com>");
gstelement_class->query = GST_DEBUG_FUNCPTR (gst_uri_decode_bin_query);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_uri_decode_bin_change_state);
gstbin_class->handle_message = GST_DEBUG_FUNCPTR (handle_message);
klass->autoplug_continue =
GST_DEBUG_FUNCPTR (gst_uri_decode_bin_autoplug_continue);
klass->autoplug_factories =
GST_DEBUG_FUNCPTR (gst_uri_decode_bin_autoplug_factories);
klass->autoplug_sort = GST_DEBUG_FUNCPTR (gst_uri_decode_bin_autoplug_sort);
klass->autoplug_select =
GST_DEBUG_FUNCPTR (gst_uri_decode_bin_autoplug_select);
klass->autoplug_query = GST_DEBUG_FUNCPTR (gst_uri_decode_bin_autoplug_query);
}
static void
gst_uri_decode_bin_init (GstURIDecodeBin * dec)
{
/* first filter out the interesting element factories */
g_mutex_init (&dec->factories_lock);
g_mutex_init (&dec->lock);
dec->uri = g_strdup (DEFAULT_PROP_URI);
dec->connection_speed = DEFAULT_CONNECTION_SPEED;
dec->caps = DEFAULT_CAPS;
dec->encoding = g_strdup (DEFAULT_SUBTITLE_ENCODING);
dec->buffer_duration = DEFAULT_BUFFER_DURATION;
dec->buffer_size = DEFAULT_BUFFER_SIZE;
dec->download = DEFAULT_DOWNLOAD;
dec->use_buffering = DEFAULT_USE_BUFFERING;
dec->force_sw_decoders = DEFAULT_FORCE_SW_DECODERS;
dec->expose_allstreams = DEFAULT_EXPOSE_ALL_STREAMS;
dec->ring_buffer_max_size = DEFAULT_RING_BUFFER_MAX_SIZE;
GST_OBJECT_FLAG_SET (dec, GST_ELEMENT_FLAG_SOURCE);
gst_bin_set_suppressed_flags (GST_BIN (dec),
GST_ELEMENT_FLAG_SOURCE | GST_ELEMENT_FLAG_SINK);
}
static void
gst_uri_decode_bin_finalize (GObject * obj)
{
GstURIDecodeBin *dec = GST_URI_DECODE_BIN (obj);
remove_decoders (dec, TRUE);
g_mutex_clear (&dec->lock);
g_mutex_clear (&dec->factories_lock);
g_free (dec->uri);
g_free (dec->encoding);
if (dec->factories)
gst_plugin_feature_list_free (dec->factories);
if (dec->caps)
gst_caps_unref (dec->caps);
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
static void
gst_uri_decode_bin_set_encoding (GstURIDecodeBin * dec, const gchar * encoding)
{
GSList *walk;
GST_URI_DECODE_BIN_LOCK (dec);
/* set property first */
GST_OBJECT_LOCK (dec);
g_free (dec->encoding);
dec->encoding = g_strdup (encoding);
GST_OBJECT_UNLOCK (dec);
/* set the property on all decodebins now */
for (walk = dec->decodebins; walk; walk = g_slist_next (walk)) {
GObject *decodebin = G_OBJECT (walk->data);
g_object_set (decodebin, "subtitle-encoding", encoding, NULL);
}
GST_URI_DECODE_BIN_UNLOCK (dec);
}
static void
gst_uri_decode_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstURIDecodeBin *dec = GST_URI_DECODE_BIN (object);
switch (prop_id) {
case PROP_URI:
GST_OBJECT_LOCK (dec);
g_free (dec->uri);
dec->uri = g_value_dup_string (value);
GST_OBJECT_UNLOCK (dec);
break;
case PROP_CONNECTION_SPEED:
GST_OBJECT_LOCK (dec);
dec->connection_speed = g_value_get_uint64 (value) * 1000;
GST_OBJECT_UNLOCK (dec);
break;
case PROP_CAPS:
GST_OBJECT_LOCK (dec);
if (dec->caps)
gst_caps_unref (dec->caps);
dec->caps = g_value_dup_boxed (value);
GST_OBJECT_UNLOCK (dec);
break;
case PROP_SUBTITLE_ENCODING:
gst_uri_decode_bin_set_encoding (dec, g_value_get_string (value));
break;
case PROP_BUFFER_SIZE:
dec->buffer_size = g_value_get_int (value);
break;
case PROP_BUFFER_DURATION:
dec->buffer_duration = g_value_get_int64 (value);
break;
case PROP_DOWNLOAD:
dec->download = g_value_get_boolean (value);
break;
case PROP_USE_BUFFERING:
dec->use_buffering = g_value_get_boolean (value);
break;
case PROP_FORCE_SW_DECODERS:
dec->force_sw_decoders = g_value_get_boolean (value);
break;
case PROP_EXPOSE_ALL_STREAMS:
dec->expose_allstreams = g_value_get_boolean (value);
break;
case PROP_RING_BUFFER_MAX_SIZE:
dec->ring_buffer_max_size = g_value_get_uint64 (value);
break;
case PROP_POST_STREAM_TOPOLOGY:
dec->post_stream_topology = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_uri_decode_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstURIDecodeBin *dec = GST_URI_DECODE_BIN (object);
switch (prop_id) {
case PROP_URI:
GST_OBJECT_LOCK (dec);
g_value_set_string (value, dec->uri);
GST_OBJECT_UNLOCK (dec);
break;
case PROP_SOURCE:
GST_OBJECT_LOCK (dec);
g_value_set_object (value, dec->source);
GST_OBJECT_UNLOCK (dec);
break;
case PROP_CONNECTION_SPEED:
GST_OBJECT_LOCK (dec);
g_value_set_uint64 (value, dec->connection_speed / 1000);
GST_OBJECT_UNLOCK (dec);
break;
case PROP_CAPS:
GST_OBJECT_LOCK (dec);
g_value_set_boxed (value, dec->caps);
GST_OBJECT_UNLOCK (dec);
break;
case PROP_SUBTITLE_ENCODING:
GST_OBJECT_LOCK (dec);
g_value_set_string (value, dec->encoding);
GST_OBJECT_UNLOCK (dec);
break;
case PROP_BUFFER_SIZE:
GST_OBJECT_LOCK (dec);
g_value_set_int (value, dec->buffer_size);
GST_OBJECT_UNLOCK (dec);
break;
case PROP_BUFFER_DURATION:
GST_OBJECT_LOCK (dec);
g_value_set_int64 (value, dec->buffer_duration);
GST_OBJECT_UNLOCK (dec);
break;
case PROP_DOWNLOAD:
g_value_set_boolean (value, dec->download);
break;
case PROP_USE_BUFFERING:
g_value_set_boolean (value, dec->use_buffering);
break;
case PROP_FORCE_SW_DECODERS:
g_value_set_boolean (value, dec->force_sw_decoders);
break;
case PROP_EXPOSE_ALL_STREAMS:
g_value_set_boolean (value, dec->expose_allstreams);
break;
case PROP_RING_BUFFER_MAX_SIZE:
g_value_set_uint64 (value, dec->ring_buffer_max_size);
break;
case PROP_POST_STREAM_TOPOLOGY:
g_value_set_boolean (value, dec->post_stream_topology);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
do_async_start (GstURIDecodeBin * dbin)
{
GstMessage *message;
dbin->async_pending = TRUE;
message = gst_message_new_async_start (GST_OBJECT_CAST (dbin));
GST_BIN_CLASS (parent_class)->handle_message (GST_BIN_CAST (dbin), message);
}
static void
do_async_done (GstURIDecodeBin * dbin)
{
GstMessage *message;
if (dbin->async_pending) {
GST_DEBUG_OBJECT (dbin, "posting ASYNC_DONE");
message =
gst_message_new_async_done (GST_OBJECT_CAST (dbin),
GST_CLOCK_TIME_NONE);
GST_BIN_CLASS (parent_class)->handle_message (GST_BIN_CAST (dbin), message);
dbin->async_pending = FALSE;
}
}
#define DEFAULT_QUEUE_SIZE (3 * GST_SECOND)
#define DEFAULT_QUEUE_MIN_THRESHOLD ((DEFAULT_QUEUE_SIZE * 30) / 100)
#define DEFAULT_QUEUE_THRESHOLD ((DEFAULT_QUEUE_SIZE * 95) / 100)
static void
unknown_type_cb (GstElement * element, GstPad * pad, GstCaps * caps,
GstURIDecodeBin * decoder)
{
gchar *capsstr;
capsstr = gst_caps_to_string (caps);
GST_ELEMENT_WARNING (decoder, STREAM, CODEC_NOT_FOUND,
(_("No decoder available for type \'%s\'."), capsstr), (NULL));
g_free (capsstr);
}
/* add a streaminfo that indicates that the stream is handled by the
* given element. This usually means that a stream without actual data is
* produced but one that is sunken by an element. Examples of this are:
* cdaudio, a hardware decoder/sink, dvd meta bins etc...
*/
static void
add_element_stream (GstElement * element, GstURIDecodeBin * decoder)
{
g_warning ("add element stream");
}
/* when the decoder element signals that no more pads will be generated, we
* can commit the current group.
*/
static void
no_more_pads_full (GstElement * element, gboolean subs,
GstURIDecodeBin * decoder)
{
gboolean final;
/* setup phase */
GST_DEBUG_OBJECT (element, "no more pads, %d pending", decoder->pending);
GST_URI_DECODE_BIN_LOCK (decoder);
final = (decoder->pending == 0);
/* nothing pending, we can exit */
if (final)
goto done;
/* the object has no pending no_more_pads */
if (!g_object_get_data (G_OBJECT (element), "pending"))
goto done;
g_object_set_data (G_OBJECT (element), "pending", NULL);
decoder->pending--;
final = (decoder->pending == 0);
done:
GST_URI_DECODE_BIN_UNLOCK (decoder);
if (final) {
/* If we got not a single stream yet, that means that all
* decodebins had missing plugins for all of their streams!
*/
if (!decoder->streams || g_hash_table_size (decoder->streams) == 0) {
if (decoder->missing_plugin_errors) {
GString *str = g_string_new ("");
GList *l;
for (l = decoder->missing_plugin_errors; l; l = l->next) {
GstMessage *msg = l->data;
gchar *debug;
gst_message_parse_error (msg, NULL, &debug);
g_string_append (str, debug);
g_free (debug);
gst_message_unref (msg);
}
g_list_free (decoder->missing_plugin_errors);
decoder->missing_plugin_errors = NULL;
GST_ELEMENT_ERROR (decoder, CORE, MISSING_PLUGIN, (NULL),
("no suitable plugins found:\n%s", str->str));
g_string_free (str, TRUE);
} else {
GST_ELEMENT_ERROR (decoder, CORE, MISSING_PLUGIN, (NULL),
("no suitable plugins found"));
}
} else {
gst_element_no_more_pads (GST_ELEMENT_CAST (decoder));
}
do_async_done (decoder);
}
return;
}
static void
no_more_pads (GstElement * element, GstURIDecodeBin * decoder)
{
no_more_pads_full (element, FALSE, decoder);
}
static void
source_no_more_pads (GstElement * element, GstURIDecodeBin * bin)
{
GST_DEBUG_OBJECT (bin, "No more pads in source element %s.",
GST_ELEMENT_NAME (element));
g_signal_handler_disconnect (element, bin->src_np_sig_id);
bin->src_np_sig_id = 0;
g_signal_handler_disconnect (element, bin->src_nmp_sig_id);
bin->src_nmp_sig_id = 0;
no_more_pads_full (element, FALSE, bin);
}
static void
configure_stream_buffering (GstURIDecodeBin * decoder)
{
GstElement *queue = NULL;
GHashTableIter iter;
gpointer key, value;
gint bitrate = 0;
/* automatic configuration enabled ? */
if (decoder->buffer_size != -1)
return;
GST_URI_DECODE_BIN_LOCK (decoder);
if (decoder->queue)
queue = gst_object_ref (decoder->queue);
g_hash_table_iter_init (&iter, decoder->streams);
while (g_hash_table_iter_next (&iter, &key, &value)) {
GstURIDecodeBinStream *stream = value;
if (stream->bitrate && bitrate >= 0)
bitrate += stream->bitrate;
else
bitrate = -1;
}
GST_URI_DECODE_BIN_UNLOCK (decoder);
GST_DEBUG_OBJECT (decoder, "overall bitrate %d", bitrate);
if (!queue)
return;
if (bitrate > 0) {
guint64 time;
guint bytes;
/* all streams have a bitrate;
* configure queue size based on queue duration using combined bitrate */
g_object_get (queue, "max-size-time", &time, NULL);
GST_DEBUG_OBJECT (decoder, "queue buffering time %" GST_TIME_FORMAT,
GST_TIME_ARGS (time));
if (time > 0) {
bytes = gst_util_uint64_scale (time, bitrate, 8 * GST_SECOND);
GST_DEBUG_OBJECT (decoder, "corresponds to buffer size %d", bytes);
g_object_set (queue, "max-size-bytes", bytes, NULL);
}
}
gst_object_unref (queue);
}
static GstPadProbeReturn
decoded_pad_event_probe (GstPad * pad, GstPadProbeInfo * info,
gpointer user_data)
{
GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
GstURIDecodeBin *decoder = user_data;
GST_LOG_OBJECT (pad, "%s, decoder %p", GST_EVENT_TYPE_NAME (event), decoder);
/* look for a bitrate tag */
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_TAG:
{
GstTagList *list;
guint bitrate = 0;
GstURIDecodeBinStream *stream;
gst_event_parse_tag (event, &list);
if (!gst_tag_list_get_uint_index (list, GST_TAG_NOMINAL_BITRATE, 0,
&bitrate)) {
gst_tag_list_get_uint_index (list, GST_TAG_BITRATE, 0, &bitrate);
}
GST_DEBUG_OBJECT (pad, "found bitrate %u", bitrate);
if (bitrate) {
GST_URI_DECODE_BIN_LOCK (decoder);
stream = g_hash_table_lookup (decoder->streams, pad);
GST_URI_DECODE_BIN_UNLOCK (decoder);
if (stream) {
stream->bitrate = bitrate;
/* no longer need this probe now */
gst_pad_remove_probe (pad, stream->probe_id);
/* configure buffer if possible */
configure_stream_buffering (decoder);
}
}
break;
}
default:
break;
}
/* never drop */
return GST_PAD_PROBE_OK;
}
static gboolean
copy_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data)
{
GstPad *gpad = GST_PAD_CAST (user_data);
GST_DEBUG_OBJECT (gpad, "store sticky event %" GST_PTR_FORMAT, *event);
gst_pad_store_sticky_event (gpad, *event);
return TRUE;
}
/* Called by the signal handlers when a decodebin has found a new raw pad */
static void
new_decoded_pad_added_cb (GstElement * element, GstPad * pad,
GstURIDecodeBin * decoder)
{
GstPad *newpad;
GstPadTemplate *pad_tmpl;
gchar *padname;
GstURIDecodeBinStream *stream;
GST_DEBUG_OBJECT (element, "new decoded pad, name: <%s>", GST_PAD_NAME (pad));
GST_URI_DECODE_BIN_LOCK (decoder);
padname = g_strdup_printf ("src_%u", decoder->numpads);
decoder->numpads++;
GST_URI_DECODE_BIN_UNLOCK (decoder);
pad_tmpl = gst_static_pad_template_get (&srctemplate);
newpad = gst_ghost_pad_new_from_template (padname, pad, pad_tmpl);
gst_object_unref (pad_tmpl);
g_free (padname);
/* store ref to the ghostpad so we can remove it */
g_object_set_data (G_OBJECT (pad), "uridecodebin.ghostpad", newpad);
/* add event probe to monitor tags */
stream = g_new0 (GstURIDecodeBinStream, 1);
stream->probe_id =
gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
decoded_pad_event_probe, decoder, NULL);
GST_URI_DECODE_BIN_LOCK (decoder);
g_hash_table_insert (decoder->streams, pad, stream);
GST_URI_DECODE_BIN_UNLOCK (decoder);
gst_pad_set_active (newpad, TRUE);
gst_pad_sticky_events_foreach (pad, copy_sticky_events, newpad);
gst_element_add_pad (GST_ELEMENT_CAST (decoder), newpad);
}
static GstPadProbeReturn
source_pad_event_probe (GstPad * pad, GstPadProbeInfo * info,
gpointer user_data)
{
GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
GstURIDecodeBin *decoder = user_data;
GST_LOG_OBJECT (pad, "%s, decoder %p", GST_EVENT_TYPE_NAME (event), decoder);
if (GST_EVENT_TYPE (event) == GST_EVENT_EOS) {
GST_DEBUG_OBJECT (pad, "we received EOS");
g_signal_emit (decoder,
gst_uri_decode_bin_signals[SIGNAL_DRAINED], 0, NULL);
}
/* never drop events */
return GST_PAD_PROBE_OK;
}
/* called when we found a raw pad on the source element. We need to set up a
* padprobe to detect EOS before exposing the pad. */
static void
expose_decoded_pad (GstElement * element, GstPad * pad,
GstURIDecodeBin * decoder)
{
gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
source_pad_event_probe, decoder, NULL);
new_decoded_pad_added_cb (element, pad, decoder);
}
static void
pad_removed_cb (GstElement * element, GstPad * pad, GstURIDecodeBin * decoder)
{
GstPad *ghost;
GST_DEBUG_OBJECT (element, "pad removed name: <%s:%s>",
GST_DEBUG_PAD_NAME (pad));
/* we only care about srcpads */
if (!GST_PAD_IS_SRC (pad))
return;
if (!(ghost = g_object_get_data (G_OBJECT (pad), "uridecodebin.ghostpad")))
goto no_ghost;
/* unghost the pad */
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (ghost), NULL);
/* deactivate and remove */
gst_pad_set_active (pad, FALSE);
gst_element_remove_pad (GST_ELEMENT_CAST (decoder), ghost);
return;
/* ERRORS */
no_ghost:
{
GST_WARNING_OBJECT (element, "no ghost pad found");
return;
}
}
/* helper function to lookup stuff in lists */
static gboolean
array_has_value (const gchar * values[], const gchar * value)
{
gint i;
for (i = 0; values[i]; i++) {
if (g_str_has_prefix (value, values[i]))
return TRUE;
}
return FALSE;
}
static gboolean
array_has_uri_value (const gchar * values[], const gchar * value)
{
gint i;
for (i = 0; values[i]; i++) {
if (!g_ascii_strncasecmp (value, values[i], strlen (values[i])))
return TRUE;
}
return FALSE;
}
/* list of URIs that we consider to be streams and that need buffering.
* We have no mechanism yet to figure this out with a query. */
static const gchar *stream_uris[] = { "http://", "https://", "mms://",
"mmsh://", "mmsu://", "mmst://", "fd://", "myth://", "ssh://",
"ftp://", "sftp://",
NULL
};
/* list of URIs that need a queue because they are pretty bursty */
static const gchar *queue_uris[] = { "cdda://", NULL };
/* blacklisted URIs, we know they will always fail. */
static const gchar *blacklisted_uris[] = { NULL };
/* media types that use adaptive streaming */
static const gchar *adaptive_media[] = {
"application/x-hls", "application/vnd.ms-sstr+xml",
"application/dash+xml", NULL
};
#define IS_STREAM_URI(uri) (array_has_uri_value (stream_uris, uri))
#define IS_QUEUE_URI(uri) (array_has_uri_value (queue_uris, uri))
#define IS_BLACKLISTED_URI(uri) (array_has_uri_value (blacklisted_uris, uri))
#define IS_ADAPTIVE_MEDIA(media) (array_has_value (adaptive_media, media))
/*
* Generate and configure a source element.
*
* Returns: (transfer full): a new #GstElement
*/
static GstElement *
gen_source_element (GstURIDecodeBin * decoder)
{
GObjectClass *source_class;
GstElement *source;
GParamSpec *pspec;
GstQuery *query;
GstSchedulingFlags flags;
GError *err = NULL;
if (!decoder->uri)
goto no_uri;
GST_LOG_OBJECT (decoder, "finding source for %s", decoder->uri);
if (!gst_uri_is_valid (decoder->uri))
goto invalid_uri;
if (IS_BLACKLISTED_URI (decoder->uri))
goto uri_blacklisted;
source =
gst_element_make_from_uri (GST_URI_SRC, decoder->uri, "source", &err);
if (!source)
goto no_source;
GST_LOG_OBJECT (decoder, "found source type %s", G_OBJECT_TYPE_NAME (source));
source_class = G_OBJECT_GET_CLASS (source);
pspec = g_object_class_find_property (source_class, "connection-speed");
if (pspec != NULL) {
guint64 speed = decoder->connection_speed / 1000;
gboolean wrong_type = FALSE;
if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_UINT) {
GParamSpecUInt *pspecuint = G_PARAM_SPEC_UINT (pspec);
speed = CLAMP (speed, pspecuint->minimum, pspecuint->maximum);
} else if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_INT) {
GParamSpecInt *pspecint = G_PARAM_SPEC_INT (pspec);
speed = CLAMP (speed, pspecint->minimum, pspecint->maximum);
} else if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_UINT64) {
GParamSpecUInt64 *pspecuint = G_PARAM_SPEC_UINT64 (pspec);
speed = CLAMP (speed, pspecuint->minimum, pspecuint->maximum);
} else if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_INT64) {
GParamSpecInt64 *pspecint = G_PARAM_SPEC_INT64 (pspec);
speed = CLAMP (speed, pspecint->minimum, pspecint->maximum);
} else {
GST_WARNING_OBJECT (decoder,
"The connection speed property %" G_GUINT64_FORMAT
" of type %s is not useful not setting it", speed,
g_type_name (G_PARAM_SPEC_TYPE (pspec)));
wrong_type = TRUE;
}
if (!wrong_type) {
g_object_set (source, "connection-speed", speed, NULL);
GST_DEBUG_OBJECT (decoder,
"setting connection-speed=%" G_GUINT64_FORMAT " to source element",
speed);
}
}
pspec = g_object_class_find_property (source_class, "subtitle-encoding");
if (pspec != NULL && G_PARAM_SPEC_VALUE_TYPE (pspec) == G_TYPE_STRING) {
GST_DEBUG_OBJECT (decoder,
"setting subtitle-encoding=%s to source element", decoder->encoding);
g_object_set (source, "subtitle-encoding", decoder->encoding, NULL);
}
/* Sink reference before passing it to signal handler.
* Language binding might otherwise sink it and then unref.
* A floating ref is also tricky for a native signal handler in case
* of a "transfer floating" call followed by unref
* (e.g. some container_add and then container_remove).
* Bottom line; best not have a floating ref boldly going into unknown code.
*/
g_object_ref_sink (source);
g_signal_emit (decoder, gst_uri_decode_bin_signals[SIGNAL_SOURCE_SETUP],
0, source);
decoder->is_stream = IS_STREAM_URI (decoder->uri);
query = gst_query_new_scheduling ();
if (gst_element_query (source, query)) {
gst_query_parse_scheduling (query, &flags, NULL, NULL, NULL);
if ((flags & GST_SCHEDULING_FLAG_BANDWIDTH_LIMITED))
decoder->is_stream = TRUE;
}
gst_query_unref (query);
GST_LOG_OBJECT (decoder, "source is stream: %d", decoder->is_stream);
decoder->need_queue = IS_QUEUE_URI (decoder->uri);
GST_LOG_OBJECT (decoder, "source needs queue: %d", decoder->need_queue);
return source;
/* ERRORS */
no_uri:
{
GST_ELEMENT_ERROR (decoder, RESOURCE, NOT_FOUND,
(_("No URI specified to play from.")), (NULL));
return NULL;
}
invalid_uri:
{
GST_ELEMENT_ERROR (decoder, RESOURCE, NOT_FOUND,
(_("Invalid URI \"%s\"."), decoder->uri), (NULL));
g_clear_error (&err);
return NULL;
}
uri_blacklisted:
{
GST_ELEMENT_ERROR (decoder, RESOURCE, FAILED,
(_("This stream type cannot be played yet.")), (NULL));
return NULL;
}
no_source:
{
/* whoops, could not create the source element, dig a little deeper to
* figure out what might be wrong. */
if (err != NULL && err->code == GST_URI_ERROR_UNSUPPORTED_PROTOCOL) {
gchar *prot;
prot = gst_uri_get_protocol (decoder->uri);
if (prot == NULL)
goto invalid_uri;
gst_element_post_message (GST_ELEMENT_CAST (decoder),
gst_missing_uri_source_message_new (GST_ELEMENT (decoder), prot));
GST_ELEMENT_ERROR (decoder, CORE, MISSING_PLUGIN,
(_("No URI handler implemented for \"%s\"."), prot), (NULL));
g_free (prot);
} else {
GST_ELEMENT_ERROR (decoder, RESOURCE, NOT_FOUND,
("%s", (err) ? err->message : "URI was not accepted by any element"),
("No element accepted URI '%s'", decoder->uri));
}
g_clear_error (&err);
return NULL;
}
}
/**
* has_raw_caps:
* @pad: a #GstPad
* @all_raw: pointer to hold the result
*
* check if the caps of the pad are all raw. The caps are all raw if
* all of its structures contain audio/x-raw or video/x-raw.
*
* Returns: %FALSE @pad caps are not set and raw
*/
static gboolean
has_raw_caps (GstPad * pad, GstCaps * rawcaps)
{
GstCaps *caps, *intersection;
gint capssize;
gboolean res = FALSE;
caps = gst_pad_get_current_caps (pad);
if (caps == NULL)
return FALSE;
GST_DEBUG_OBJECT (pad, "have caps %" GST_PTR_FORMAT, caps);
capssize = gst_caps_get_size (caps);
/* no caps, skip and move to the next pad */
if (capssize == 0 || gst_caps_is_empty (caps) || gst_caps_is_any (caps))
goto done;
intersection = gst_caps_intersect (caps, rawcaps);
res = !gst_caps_is_empty (intersection);
gst_caps_unref (intersection);
done:
gst_caps_unref (caps);
return res;
}
static void
post_missing_plugin_error (GstElement * dec, const gchar * element_name)
{
GstMessage *msg;
msg = gst_missing_element_message_new (dec, element_name);
gst_element_post_message (dec, msg);
GST_ELEMENT_ERROR (dec, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
element_name), (NULL));
do_async_done (GST_URI_DECODE_BIN (dec));
}
/**
* analyse_source:
* @decoder: a #GstURIDecodeBin
* @is_raw: are all pads raw data
* @have_out: does the source have output
* @is_dynamic: is this a dynamic source
* @use_queue: put a queue before raw output pads
*
* Check the source of @decoder and collect information about it.
*
* @is_raw will be set to TRUE if the source only produces raw pads. When this
* function returns, all of the raw pad of the source will be added
* to @decoder.
*
* @have_out: will be set to TRUE if the source has output pads.
*
* @is_dynamic: TRUE if the element will create (more) pads dynamically later
* on.
*
* Returns: FALSE if a fatal error occurred while scanning.
*/
static gboolean
analyse_source (GstURIDecodeBin * decoder, gboolean * is_raw,
gboolean * have_out, gboolean * is_dynamic, gboolean use_queue)
{
GstIterator *pads_iter;
gboolean done = FALSE;
gboolean res = TRUE;
GstCaps *rawcaps;
GstPad *pad;
GValue item = { 0, };
*have_out = FALSE;
*is_raw = FALSE;
*is_dynamic = FALSE;
g_object_get (decoder, "caps", &rawcaps, NULL);
if (!rawcaps)
rawcaps = DEFAULT_CAPS;
pads_iter = gst_element_iterate_src_pads (decoder->source);
while (!done) {
switch (gst_iterator_next (pads_iter, &item)) {
case GST_ITERATOR_ERROR:
res = FALSE;
/* FALLTHROUGH */
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_RESYNC:
/* reset results and resync */
*have_out = FALSE;
*is_raw = FALSE;
*is_dynamic = FALSE;
gst_iterator_resync (pads_iter);
break;
case GST_ITERATOR_OK:
pad = g_value_dup_object (&item);
/* we now officially have an output pad */
*have_out = TRUE;
/* if FALSE, this pad has no caps and we continue with the next pad. */
if (!has_raw_caps (pad, rawcaps)) {
gst_object_unref (pad);
g_value_reset (&item);
break;
} else {
/* caps on source pad are all raw, we can add the pad */
GstElement *outelem;
*is_raw = TRUE;
if (use_queue) {
GstPad *sinkpad;
/* insert a queue element right before the raw pad */
outelem = gst_element_factory_make ("queue2", NULL);
if (!outelem)
goto no_queue2;
gst_bin_add (GST_BIN_CAST (decoder), outelem);
sinkpad = gst_element_get_static_pad (outelem, "sink");
gst_pad_link (pad, sinkpad);
gst_object_unref (sinkpad);
/* save queue pointer so we can remove it later */
decoder->queue = outelem;
/* get the new raw srcpad */
gst_object_unref (pad);
pad = gst_element_get_static_pad (outelem, "src");
} else {
outelem = decoder->source;
}
expose_decoded_pad (outelem, pad, decoder);
}
gst_object_unref (pad);
g_value_reset (&item);
break;
}
}
g_value_unset (&item);
gst_iterator_free (pads_iter);
gst_caps_unref (rawcaps);
if (!*have_out) {
GstElementClass *elemclass;
GList *walk;
/* element has no output pads, check for padtemplates that list SOMETIMES
* pads. */
elemclass = GST_ELEMENT_GET_CLASS (decoder->source);
walk = gst_element_class_get_pad_template_list (elemclass);
while (walk != NULL) {
GstPadTemplate *templ;
templ = (GstPadTemplate *) walk->data;
if (GST_PAD_TEMPLATE_DIRECTION (templ) == GST_PAD_SRC) {
if (GST_PAD_TEMPLATE_PRESENCE (templ) == GST_PAD_SOMETIMES)
*is_dynamic = TRUE;
break;
}
walk = g_list_next (walk);
}
}
return res;
no_queue2:
{
post_missing_plugin_error (GST_ELEMENT_CAST (decoder), "queue2");
gst_object_unref (pad);
g_value_unset (&item);
gst_iterator_free (pads_iter);
gst_caps_unref (rawcaps);
return FALSE;
}
}
/* Remove all decodebin from ourself
* If force is FALSE, then the decodebin instances will be stored in
* pending_decodebins for re-use later on.
* If force is TRUE, then all decodebin instances will be unreferenced
* and cleared, including the pending ones. */
static void
remove_decoders (GstURIDecodeBin * bin, gboolean force)
{
GSList *walk;
for (walk = bin->decodebins; walk; walk = g_slist_next (walk)) {
GstElement *decoder = GST_ELEMENT_CAST (walk->data);
GST_DEBUG_OBJECT (bin, "removing old decoder element");
/* Even if we reuse this decodebin, the previous topology will
* be irrelevant */
g_object_set_data (G_OBJECT (decoder), "uridecodebin-topology", NULL);
if (force) {
gst_element_set_state (decoder, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (bin), decoder);
} else {
GstCaps *caps;
gst_element_set_state (decoder, GST_STATE_READY);
/* add it to our list of pending decodebins */
gst_object_ref (decoder);
gst_bin_remove (GST_BIN_CAST (bin), decoder);
/* restore some properties we might have changed */
g_object_set (decoder, "sink-caps", NULL, NULL);
caps = DEFAULT_CAPS;
g_object_set (decoder, "caps", caps, NULL);
gst_caps_unref (caps);
bin->pending_decodebins =
g_slist_prepend (bin->pending_decodebins, decoder);
}
}
g_slist_free (bin->decodebins);
bin->decodebins = NULL;
if (force) {
GSList *tmp;
for (tmp = bin->pending_decodebins; tmp; tmp = tmp->next) {
gst_element_set_state ((GstElement *) tmp->data, GST_STATE_NULL);
gst_object_unref ((GstElement *) tmp->data);
}
g_slist_free (bin->pending_decodebins);
bin->pending_decodebins = NULL;
}
}
static void
proxy_unknown_type_signal (GstElement * decodebin, GstPad * pad, GstCaps * caps,
GstURIDecodeBin * dec)
{
GST_DEBUG_OBJECT (dec, "unknown-type signaled");
g_signal_emit (dec,
gst_uri_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, pad, caps);
}
static gboolean
proxy_autoplug_continue_signal (GstElement * decodebin, GstPad * pad,
GstCaps * caps, GstURIDecodeBin * dec)
{
gboolean result;
g_signal_emit (dec,
gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE], 0, pad, caps,
&result);
GST_DEBUG_OBJECT (dec, "autoplug-continue returned %d", result);
return result;
}
static GValueArray *
proxy_autoplug_factories_signal (GstElement * decodebin, GstPad * pad,
GstCaps * caps, GstURIDecodeBin * dec)
{
GValueArray *result;
g_signal_emit (dec,
gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES], 0, pad, caps,
&result);
GST_DEBUG_OBJECT (dec, "autoplug-factories returned %p", result);
return result;
}
static GValueArray *
proxy_autoplug_sort_signal (GstElement * decodebin, GstPad * pad,
GstCaps * caps, GValueArray * factories, GstURIDecodeBin * dec)
{
GValueArray *result;
g_signal_emit (dec,
gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_SORT], 0, pad, caps,
factories, &result);
GST_DEBUG_OBJECT (dec, "autoplug-sort returned %p", result);
return result;
}
static GstAutoplugSelectResult
proxy_autoplug_select_signal (GstElement * decodebin, GstPad * pad,
GstCaps * caps, GstElementFactory * factory, GstURIDecodeBin * dec)
{
GstAutoplugSelectResult result;
g_signal_emit (dec,
gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT], 0, pad, caps, factory,
&result);
GST_DEBUG_OBJECT (dec, "autoplug-select returned %d", result);
return result;
}
static gboolean
proxy_autoplug_query_signal (GstElement * decodebin, GstPad * pad,
GstElement * element, GstQuery * query, GstURIDecodeBin * dec)
{
gboolean ret = FALSE;
g_signal_emit (dec,
gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_QUERY], 0, pad, element, query,
&ret);
GST_DEBUG_OBJECT (dec, "autoplug-query returned %d", ret);
return ret;
}
static void
proxy_drained_signal (GstElement * decodebin, GstURIDecodeBin * dec)
{
GST_DEBUG_OBJECT (dec, "drained signaled");
g_signal_emit (dec, gst_uri_decode_bin_signals[SIGNAL_DRAINED], 0, NULL);
}
/* make a decodebin and connect to all the signals */
static GstElement *
make_decoder (GstURIDecodeBin * decoder)
{
GstElement *decodebin;
gboolean unref_dbin = FALSE;
/* re-use pending decodebin */
if (decoder->pending_decodebins) {
GSList *first = decoder->pending_decodebins;
GST_LOG_OBJECT (decoder, "re-using pending decodebin");
decodebin = (GstElement *) first->data;
decoder->pending_decodebins =
g_slist_delete_link (decoder->pending_decodebins, first);
unref_dbin = TRUE;
} else {
GST_LOG_OBJECT (decoder, "making new decodebin");
/* now create the decoder element */
decodebin = gst_element_factory_make ("decodebin", NULL);
if (!decodebin)
goto no_decodebin;
/* sanity check */
if (decodebin->numsinkpads == 0)
goto no_typefind;
/* connect signals to proxy */
g_signal_connect (decodebin, "unknown-type",
G_CALLBACK (proxy_unknown_type_signal), decoder);
g_signal_connect (decodebin, "autoplug-continue",
G_CALLBACK (proxy_autoplug_continue_signal), decoder);
g_signal_connect (decodebin, "autoplug-factories",
G_CALLBACK (proxy_autoplug_factories_signal), decoder);
g_signal_connect (decodebin, "autoplug-sort",
G_CALLBACK (proxy_autoplug_sort_signal), decoder);
g_signal_connect (decodebin, "autoplug-select",
G_CALLBACK (proxy_autoplug_select_signal), decoder);
g_signal_connect (decodebin, "autoplug-query",
G_CALLBACK (proxy_autoplug_query_signal), decoder);
g_signal_connect (decodebin, "drained",
G_CALLBACK (proxy_drained_signal), decoder);
/* set up callbacks to create the links between decoded data
* and video/audio/subtitle rendering/output. */
g_signal_connect (decodebin,
"pad-added", G_CALLBACK (new_decoded_pad_added_cb), decoder);
g_signal_connect (decodebin,
"pad-removed", G_CALLBACK (pad_removed_cb), decoder);
g_signal_connect (decodebin, "no-more-pads",
G_CALLBACK (no_more_pads), decoder);
g_signal_connect (decodebin,
"unknown-type", G_CALLBACK (unknown_type_cb), decoder);
}
g_object_set (decodebin, "force-sw-decoders", decoder->force_sw_decoders,
NULL);
/* configure caps if we have any */
if (decoder->caps)
g_object_set (decodebin, "caps", decoder->caps, NULL);
/* Propagate expose-all-streams, connection-speed properties
* and post_stream_topology */
g_object_set (decodebin, "expose-all-streams", decoder->expose_allstreams,
"connection-speed", decoder->connection_speed / 1000,
"post-stream-topology", decoder->post_stream_topology, NULL);
if (!decoder->is_stream || decoder->is_adaptive) {
/* propagate the use-buffering property but only when we are not already
* doing stream buffering with queue2. FIXME, we might want to do stream
* buffering with the multiqueue buffering instead of queue2. */
g_object_set (decodebin, "use-buffering", decoder->use_buffering
|| decoder->is_adaptive, NULL);
if (decoder->use_buffering || decoder->is_adaptive) {
guint max_bytes;
guint64 max_time;
/* configure sizes when buffering */
if ((max_bytes = decoder->buffer_size) == -1)
max_bytes = 2 * 1024 * 1024;
if ((max_time = decoder->buffer_duration) == -1)
max_time = 5 * GST_SECOND;
g_object_set (decodebin, "max-size-bytes", max_bytes, "max-size-buffers",
(guint) 0, "max-size-time", max_time, NULL);
}
}
g_object_set_data (G_OBJECT (decodebin), "pending", GINT_TO_POINTER (1));
g_object_set (decodebin, "subtitle-encoding", decoder->encoding, NULL);
decoder->pending++;
GST_LOG_OBJECT (decoder, "have %d pending dynamic objects", decoder->pending);
gst_bin_add (GST_BIN_CAST (decoder), decodebin);
decoder->decodebins = g_slist_prepend (decoder->decodebins, decodebin);
/* Unref if this decodebin came from our pending_decodebins,
* since we were holding strong reference to decodebin and gst_bin_add()
* will increase refcount */
if (unref_dbin)
gst_object_unref (decodebin);
return decodebin;
/* ERRORS */
no_decodebin:
{
post_missing_plugin_error (GST_ELEMENT_CAST (decoder), "decodebin");
GST_ELEMENT_ERROR (decoder, CORE, MISSING_PLUGIN, (NULL),
("No decodebin element, check your installation"));
do_async_done (decoder);
return NULL;
}
no_typefind:
{
gst_object_unref (decodebin);
GST_ELEMENT_ERROR (decoder, CORE, MISSING_PLUGIN, (NULL),
("No typefind element, decodebin is unusable, check your installation"));
do_async_done (decoder);
return NULL;
}
}
/* signaled when we have a stream and we need to configure the download
* buffering or regular buffering */
static void
type_found (GstElement * typefind, guint probability,
GstCaps * caps, GstURIDecodeBin * decoder)
{
GstElement *src_elem, *dec_elem, *queue = NULL;
GstStructure *s;
const gchar *media_type, *elem_name;
gboolean do_download = FALSE;
GST_DEBUG_OBJECT (decoder, "typefind found caps %" GST_PTR_FORMAT, caps);
s = gst_caps_get_structure (caps, 0);
media_type = gst_structure_get_name (s);
decoder->is_adaptive = IS_ADAPTIVE_MEDIA (media_type);
/* only enable download buffering if the upstream duration is known */
if (decoder->download) {
gint64 dur;
do_download = (gst_element_query_duration (typefind, GST_FORMAT_BYTES, &dur)
&& dur != -1);
}
dec_elem = make_decoder (decoder);
if (!dec_elem)
goto no_decodebin;
if (decoder->is_adaptive) {
src_elem = typefind;
} else {
if (do_download) {
elem_name = "downloadbuffer";
} else {
elem_name = "queue2";
}
queue = gst_element_factory_make (elem_name, NULL);
if (!queue)
goto no_buffer_element;
decoder->queue = queue;
GST_DEBUG_OBJECT (decoder, "check media-type %s, %d", media_type,
do_download);
if (do_download) {
gchar *temp_template, *filename;
const gchar *tmp_dir, *prgname;
tmp_dir = g_get_user_cache_dir ();
prgname = g_get_prgname ();
if (prgname == NULL)
prgname = "GStreamer";
filename = g_strdup_printf ("%s-XXXXXX", prgname);
/* build our filename */
temp_template = g_build_filename (tmp_dir, filename, NULL);
GST_DEBUG_OBJECT (decoder, "enable download buffering in %s (%s, %s, %s)",
temp_template, tmp_dir, prgname, filename);
/* configure progressive download for selected media types */
g_object_set (queue, "temp-template", temp_template, NULL);
g_free (filename);
g_free (temp_template);
} else {
g_object_set (queue, "use-buffering", TRUE, NULL);
g_object_set (queue, "ring-buffer-max-size",
decoder->ring_buffer_max_size, NULL);
/* Disable max-size-buffers */
g_object_set (queue, "max-size-buffers", 0, NULL);
}
/* If buffer size or duration are set, set them on the element */
if (decoder->buffer_size != -1)
g_object_set (queue, "max-size-bytes", decoder->buffer_size, NULL);
if (decoder->buffer_duration != -1)
g_object_set (queue, "max-size-time", decoder->buffer_duration, NULL);
gst_bin_add (GST_BIN_CAST (decoder), queue);
if (!gst_element_link_pads (typefind, "src", queue, "sink"))
goto could_not_link;
src_elem = queue;
}
/* to force caps on the decodebin element and avoid reparsing stuff by
* typefind. It also avoids a deadlock in the way typefind activates pads in
* the state change */
g_object_set (dec_elem, "sink-caps", caps, NULL);
if (!gst_element_link_pads (src_elem, "src", dec_elem, "sink"))
goto could_not_link;
/* PLAYING in one go might fail (see bug #632782) */
gst_element_set_state (dec_elem, GST_STATE_PAUSED);
gst_element_sync_state_with_parent (dec_elem);
if (queue)
gst_element_sync_state_with_parent (queue);
return;
/* ERRORS */
no_decodebin:
{
/* error was posted */
return;
}
could_not_link:
{
GST_ELEMENT_ERROR (decoder, CORE, NEGOTIATION,
(NULL), ("Can't link typefind to decodebin element"));
do_async_done (decoder);
return;
}
no_buffer_element:
{
post_missing_plugin_error (GST_ELEMENT_CAST (decoder), elem_name);
return;
}
}
/* setup a streaming source. This will first plug a typefind element to the
* source. After we find the type, we decide to plug a queue2 and continue to
* plug a decodebin starting from the found caps */
static gboolean
setup_streaming (GstURIDecodeBin * decoder)
{
GstElement *typefind;
/* now create the decoder element */
typefind = gst_element_factory_make ("typefind", NULL);
if (!typefind)
goto no_typefind;
gst_bin_add (GST_BIN_CAST (decoder), typefind);
if (!gst_element_link_pads (decoder->source, NULL, typefind, "sink"))
goto could_not_link;
decoder->typefind = typefind;
/* connect a signal to find out when the typefind element found
* a type */
decoder->have_type_id =
g_signal_connect (decoder->typefind, "have-type",
G_CALLBACK (type_found), decoder);
return TRUE;
/* ERRORS */
no_typefind:
{
post_missing_plugin_error (GST_ELEMENT_CAST (decoder), "typefind");
GST_ELEMENT_ERROR (decoder, CORE, MISSING_PLUGIN, (NULL),
("No typefind element, check your installation"));
do_async_done (decoder);
return FALSE;
}
could_not_link:
{
GST_ELEMENT_ERROR (decoder, CORE, NEGOTIATION,
(NULL), ("Can't link source to typefind element"));
gst_bin_remove (GST_BIN_CAST (decoder), typefind);
do_async_done (decoder);
return FALSE;
}
}
static void
free_stream (gpointer value)
{
g_free (value);
}
/* remove source and all related elements */
static void
remove_source (GstURIDecodeBin * bin)
{
GstElement *source = bin->source;
if (source) {
GST_DEBUG_OBJECT (bin, "removing old src element");
gst_element_set_state (source, GST_STATE_NULL);
if (bin->src_np_sig_id) {
g_signal_handler_disconnect (source, bin->src_np_sig_id);
bin->src_np_sig_id = 0;
}
if (bin->src_nmp_sig_id) {
g_signal_handler_disconnect (source, bin->src_nmp_sig_id);
bin->src_nmp_sig_id = 0;
}
GST_OBJECT_LOCK (bin);
bin->source = NULL;
GST_OBJECT_UNLOCK (bin);
gst_bin_remove (GST_BIN_CAST (bin), source);
}
if (bin->queue) {
GST_DEBUG_OBJECT (bin, "removing old queue element");
gst_element_set_state (bin->queue, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (bin), bin->queue);
bin->queue = NULL;
}
if (bin->typefind) {
GST_DEBUG_OBJECT (bin, "removing old typefind element");
gst_element_set_state (bin->typefind, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (bin), bin->typefind);
bin->typefind = NULL;
}
if (bin->streams) {
g_hash_table_destroy (bin->streams);
bin->streams = NULL;
}
}
/* is called when a dynamic source element created a new pad. */
static void
source_new_pad (GstElement * element, GstPad * pad, GstURIDecodeBin * bin)
{
GstElement *decoder;
GstCaps *rawcaps;
GstPad *sinkpad;
GST_URI_DECODE_BIN_LOCK (bin);
GST_DEBUG_OBJECT (bin, "Found new pad %s.%s in source element %s",
GST_DEBUG_PAD_NAME (pad), GST_ELEMENT_NAME (element));
g_object_get (bin, "caps", &rawcaps, NULL);
if (!rawcaps)
rawcaps = DEFAULT_CAPS;
/* if this is a pad with all raw caps, we can expose it.
* But if stream-topology needs to be posted, we need to
* plug a decodebin so it can build the topology for us to forward. */
if (!bin->post_stream_topology && has_raw_caps (pad, rawcaps)) {
/* it's all raw, create output pads. */
GST_URI_DECODE_BIN_UNLOCK (bin);
gst_caps_unref (rawcaps);
expose_decoded_pad (element, pad, bin);
return;
}
gst_caps_unref (rawcaps);
/* not raw, create decoder */
decoder = make_decoder (bin);
if (!decoder)
goto no_decodebin;
/* and link to decoder */
sinkpad = gst_element_get_static_pad (decoder, "sink");
if (gst_pad_link (pad, sinkpad) != GST_PAD_LINK_OK)
goto could_not_link;
gst_object_unref (sinkpad);
GST_DEBUG_OBJECT (bin, "linked decoder to new source pad");
gst_element_sync_state_with_parent (decoder);
GST_URI_DECODE_BIN_UNLOCK (bin);
return;
/* ERRORS */
no_decodebin:
{
/* error was posted */
GST_URI_DECODE_BIN_UNLOCK (bin);
return;
}
could_not_link:
{
gst_object_unref (sinkpad);
GST_ELEMENT_ERROR (bin, CORE, NEGOTIATION,
(NULL), ("Can't link source to decoder element"));
GST_URI_DECODE_BIN_UNLOCK (bin);
do_async_done (bin);
return;
}
}
static gboolean
is_live_source (GstElement * source)
{
GObjectClass *source_class = NULL;
gboolean is_live = FALSE;
GParamSpec *pspec;
source_class = G_OBJECT_GET_CLASS (source);
pspec = g_object_class_find_property (source_class, "is-live");
if (!pspec || G_PARAM_SPEC_VALUE_TYPE (pspec) != G_TYPE_BOOLEAN)
return FALSE;
g_object_get (G_OBJECT (source), "is-live", &is_live, NULL);
return is_live;
}
/* construct and run the source and decoder elements until we found
* all the streams or until a preroll queue has been filled.
*/
static gboolean
setup_source (GstURIDecodeBin * decoder)
{
gboolean is_raw, have_out, is_dynamic;
GstElement *source;
GST_DEBUG_OBJECT (decoder, "setup source");
/* delete old src */
remove_source (decoder);
decoder->pending = 0;
/* create and configure an element that can handle the uri */
source = gen_source_element (decoder);
GST_OBJECT_LOCK (decoder);
if (!(decoder->source = source)) {
GST_OBJECT_UNLOCK (decoder);
goto no_source;
}
GST_OBJECT_UNLOCK (decoder);
/* state will be merged later - if file is not found, error will be
* handled by the application right after. */
gst_bin_add (GST_BIN_CAST (decoder), decoder->source);
/* bin now has a ref, but the local reference is not counted */
g_object_unref (decoder->source);
/* notify of the new source used */
g_object_notify (G_OBJECT (decoder), "source");
if (is_live_source (decoder->source))
decoder->is_stream = FALSE;
/* remove the old decoders now, if any */
remove_decoders (decoder, FALSE);
/* stream admin setup */
decoder->streams = g_hash_table_new_full (NULL, NULL, NULL, free_stream);
if (gst_element_set_state (source,
GST_STATE_READY) != GST_STATE_CHANGE_SUCCESS)
goto state_fail;
/* see if the source element emits raw audio/video all by itself,
* if so, we can create streams for the pads and be done with it.
* Also check that is has source pads, if not, we assume it will
* do everything itself. */
if (!analyse_source (decoder, &is_raw, &have_out, &is_dynamic,
decoder->need_queue))
goto invalid_source;
if (is_raw) {
GST_DEBUG_OBJECT (decoder, "Source provides all raw data");
/* source provides raw data, we added the pads and we can now signal a
* no_more pads because we are done. */
gst_element_no_more_pads (GST_ELEMENT_CAST (decoder));
do_async_done (decoder);
return TRUE;
}
if (!have_out && !is_dynamic) {
GST_DEBUG_OBJECT (decoder, "Source has no output pads");
/* create a stream to indicate that this uri is handled by a self
* contained element. We are now done. */
add_element_stream (decoder->source, decoder);
return TRUE;
}
if (is_dynamic) {
GST_DEBUG_OBJECT (decoder, "Source has dynamic output pads");
/* connect a handler for the new-pad signal */
decoder->src_np_sig_id =
g_signal_connect (decoder->source, "pad-added",
G_CALLBACK (source_new_pad), decoder);
decoder->src_nmp_sig_id =
g_signal_connect (decoder->source, "no-more-pads",
G_CALLBACK (source_no_more_pads), decoder);
g_object_set_data (G_OBJECT (decoder->source), "pending",
GINT_TO_POINTER (1));
decoder->pending++;
} else {
if (decoder->is_stream) {
GST_DEBUG_OBJECT (decoder, "Setting up streaming");
/* do the stream things here */
if (!setup_streaming (decoder))
goto streaming_failed;
} else {
GstElement *dec_elem;
/* no streaming source, we can link now */
GST_DEBUG_OBJECT (decoder, "Plugging decodebin to source");
dec_elem = make_decoder (decoder);
if (!dec_elem)
goto no_decoder;
if (!gst_element_link_pads (decoder->source, NULL, dec_elem, "sink"))
goto could_not_link;
}
}
return TRUE;
/* ERRORS */
no_source:
{
/* error message was already posted */
return FALSE;
}
state_fail:
{
GST_ELEMENT_ERROR (decoder, CORE, FAILED,
(_("Source element can't be prepared")), (NULL));
return FALSE;
}
invalid_source:
{
GST_ELEMENT_ERROR (decoder, CORE, FAILED,
(_("Source element is invalid.")), (NULL));
return FALSE;
}
no_decoder:
{
/* message was posted */
return FALSE;
}
streaming_failed:
{
/* message was posted */
return FALSE;
}
could_not_link:
{
GST_ELEMENT_ERROR (decoder, CORE, NEGOTIATION,
(NULL), ("Can't link source to decoder element"));
return FALSE;
}
}
static void
value_list_append_structure_list (GValue * list_val, GstStructure ** first,
GList * structure_list)
{
GList *l;
for (l = structure_list; l != NULL; l = l->next) {
GValue val = { 0, };
if (*first == NULL)
*first = gst_structure_copy ((GstStructure *) l->data);
g_value_init (&val, GST_TYPE_STRUCTURE);
g_value_take_boxed (&val, gst_structure_copy ((GstStructure *) l->data));
gst_value_list_append_value (list_val, &val);
g_value_unset (&val);
}
}
/* if it's a redirect message with multiple redirect locations we might
* want to pick a different 'best' location depending on the required
* bitrates and the connection speed */
static GstMessage *
handle_redirect_message (GstURIDecodeBin * dec, GstMessage * msg)
{
const GValue *locations_list, *location_val;
GstMessage *new_msg;
GstStructure *new_structure = NULL;
GList *l_good = NULL, *l_neutral = NULL, *l_bad = NULL;
GValue new_list = { 0, };
guint size, i;
const GstStructure *structure;
GST_DEBUG_OBJECT (dec, "redirect message: %" GST_PTR_FORMAT, msg);
GST_DEBUG_OBJECT (dec, "connection speed: %" G_GUINT64_FORMAT,
dec->connection_speed);
structure = gst_message_get_structure (msg);
if (dec->connection_speed == 0 || structure == NULL)
return msg;
locations_list = gst_structure_get_value (structure, "locations");
if (locations_list == NULL)
return msg;
size = gst_value_list_get_size (locations_list);
if (size < 2)
return msg;
/* maintain existing order as much as possible, just sort references
* with too high a bitrate to the end (the assumption being that if
* bitrates are given they are given for all interesting streams and
* that the you-need-at-least-version-xyz redirect has the same bitrate
* as the lowest referenced redirect alternative) */
for (i = 0; i < size; ++i) {
const GstStructure *s;
gint bitrate = 0;
location_val = gst_value_list_get_value (locations_list, i);
s = (const GstStructure *) g_value_get_boxed (location_val);
if (!gst_structure_get_int (s, "minimum-bitrate", &bitrate) || bitrate <= 0) {
GST_DEBUG_OBJECT (dec, "no bitrate: %" GST_PTR_FORMAT, s);
l_neutral = g_list_append (l_neutral, (gpointer) s);
} else if (bitrate > dec->connection_speed) {
GST_DEBUG_OBJECT (dec, "bitrate too high: %" GST_PTR_FORMAT, s);
l_bad = g_list_append (l_bad, (gpointer) s);
} else if (bitrate <= dec->connection_speed) {
GST_DEBUG_OBJECT (dec, "bitrate OK: %" GST_PTR_FORMAT, s);
l_good = g_list_append (l_good, (gpointer) s);
}
}
g_value_init (&new_list, GST_TYPE_LIST);
value_list_append_structure_list (&new_list, &new_structure, l_good);
value_list_append_structure_list (&new_list, &new_structure, l_neutral);
value_list_append_structure_list (&new_list, &new_structure, l_bad);
gst_structure_take_value (new_structure, "locations", &new_list);
g_list_free (l_good);
g_list_free (l_neutral);
g_list_free (l_bad);
new_msg = gst_message_new_element (msg->src, new_structure);
gst_message_unref (msg);
GST_DEBUG_OBJECT (dec, "new redirect message: %" GST_PTR_FORMAT, new_msg);
return new_msg;
}
static GstMessage *
make_topology_message (GstURIDecodeBin * dec)
{
GSList *tmp;
GstStructure *aggregated_topology = NULL;
GValue list = G_VALUE_INIT;
GstCaps *caps = NULL;
gchar *name, *proto;
aggregated_topology = gst_structure_new_empty ("stream-topology");
g_value_init (&list, GST_TYPE_LIST);
for (tmp = dec->decodebins; tmp; tmp = tmp->next) {
GValue item = G_VALUE_INIT;
GstStructure *dec_topology =
g_object_get_data (G_OBJECT (tmp->data), "uridecodebin-topology");
g_value_init (&item, GST_TYPE_STRUCTURE);
gst_value_set_structure (&item, dec_topology);
gst_value_list_append_and_take_value (&list, &item);
}
gst_structure_take_value (aggregated_topology, "next", &list);
/* This is a bit wacky, but that's the best way I can find to express
* uridecodebin 'caps' as subsequently shown by gst-discoverer */
proto = gst_uri_get_protocol (dec->uri);
name = g_strdup_printf ("application/%s", proto);
g_free (proto);
caps = gst_caps_new_empty_simple (name);
g_free (name);
gst_structure_set (aggregated_topology, "caps", GST_TYPE_CAPS, caps, NULL);
gst_caps_unref (caps);
return gst_message_new_element (GST_OBJECT (dec), aggregated_topology);
}
static void
check_topology (gpointer data, gpointer user_data)
{
gboolean *has_topo = user_data;
if (g_object_get_data (data, "uridecodebin-topology") == NULL)
*has_topo = FALSE;
}
static void
handle_message (GstBin * bin, GstMessage * msg)
{
GstURIDecodeBin *dec = GST_URI_DECODE_BIN (bin);
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_ELEMENT:{
if (gst_message_has_name (msg, "stream-topology")) {
GstElement *element = GST_ELEMENT (GST_MESSAGE_SRC (msg));
gboolean has_all_topo = TRUE;
if (dec->pending || (dec->decodebins && dec->decodebins->next != NULL)) {
const GstStructure *structure;
/* If there is only one, just let it through, so this case is if
* there is more than one.
*/
structure = gst_message_get_structure (msg);
g_object_set_data_full (G_OBJECT (element), "uridecodebin-topology",
gst_structure_copy (structure),
(GDestroyNotify) gst_structure_free);
gst_message_unref (msg);
msg = NULL;
g_slist_foreach (dec->decodebins, check_topology, &has_all_topo);
if (has_all_topo)
msg = make_topology_message (dec);
}
} else if (gst_message_has_name (msg, "redirect")) {
/* sort redirect messages based on the connection speed. This simplifies
* the user of this element as it can in most cases just pick the first item
* of the sorted list as a good redirection candidate. It can of course
* choose something else from the list if it has a better way. */
msg = handle_redirect_message (dec, msg);
}
break;
}
case GST_MESSAGE_ERROR:{
GError *err = NULL;
/* Filter out missing plugin error messages from the decodebins. Only if
* all decodebins exposed no streams we will report a missing plugin
* error from no_more_pads_full()
*/
gst_message_parse_error (msg, &err, NULL);
if (g_error_matches (err, GST_CORE_ERROR, GST_CORE_ERROR_MISSING_PLUGIN)
|| g_error_matches (err, GST_STREAM_ERROR,
GST_STREAM_ERROR_CODEC_NOT_FOUND)) {
dec->missing_plugin_errors =
g_list_prepend (dec->missing_plugin_errors, gst_message_ref (msg));
no_more_pads_full (GST_ELEMENT (GST_MESSAGE_SRC (msg)), FALSE,
GST_URI_DECODE_BIN (bin));
gst_message_unref (msg);
msg = NULL;
}
g_clear_error (&err);
break;
}
default:
break;
}
if (msg)
GST_BIN_CLASS (parent_class)->handle_message (bin, msg);
}
/* generic struct passed to all query fold methods
* FIXME, move to core.
*/
typedef struct
{
GstQuery *query;
gint64 min;
gint64 max;
gboolean seekable;
gboolean live;
} QueryFold;
typedef void (*QueryInitFunction) (GstURIDecodeBin * dec, QueryFold * fold);
typedef void (*QueryDoneFunction) (GstURIDecodeBin * dec, QueryFold * fold);
/* for duration/position we collect all durations/positions and take
* the MAX of all valid results */
static void
decoder_query_init (GstURIDecodeBin * dec, QueryFold * fold)
{
fold->min = 0;
fold->max = -1;
fold->seekable = TRUE;
fold->live = 0;
}
static gboolean
decoder_query_duration_fold (const GValue * item, GValue * ret,
QueryFold * fold)
{
GstPad *pad = g_value_get_object (item);
if (gst_pad_query (pad, fold->query)) {
gint64 duration;
g_value_set_boolean (ret, TRUE);
gst_query_parse_duration (fold->query, NULL, &duration);
GST_DEBUG_OBJECT (pad, "got duration %" G_GINT64_FORMAT, duration);
if (duration > fold->max)
fold->max = duration;
}
return TRUE;
}
static void
decoder_query_duration_done (GstURIDecodeBin * dec, QueryFold * fold)
{
GstFormat format;
gst_query_parse_duration (fold->query, &format, NULL);
/* store max in query result */
gst_query_set_duration (fold->query, format, fold->max);
GST_DEBUG ("max duration %" G_GINT64_FORMAT, fold->max);
}
static gboolean
decoder_query_position_fold (const GValue * item, GValue * ret,
QueryFold * fold)
{
GstPad *pad = g_value_get_object (item);
if (gst_pad_query (pad, fold->query)) {
gint64 position;
g_value_set_boolean (ret, TRUE);
gst_query_parse_position (fold->query, NULL, &position);
GST_DEBUG_OBJECT (pad, "got position %" G_GINT64_FORMAT, position);
if (position > fold->max)
fold->max = position;
}
return TRUE;
}
static void
decoder_query_position_done (GstURIDecodeBin * dec, QueryFold * fold)
{
GstFormat format;
gst_query_parse_position (fold->query, &format, NULL);
/* store max in query result */
gst_query_set_position (fold->query, format, fold->max);
GST_DEBUG_OBJECT (dec, "max position %" G_GINT64_FORMAT, fold->max);
}
static gboolean
decoder_query_latency_fold (const GValue * item, GValue * ret, QueryFold * fold)
{
GstPad *pad = g_value_get_object (item);
if (gst_pad_query (pad, fold->query)) {
GstClockTime min, max;
gboolean live;
gst_query_parse_latency (fold->query, &live, &min, &max);
GST_DEBUG_OBJECT (pad,
"got latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
if (live) {
/* for the combined latency we collect the MAX of all min latencies and
* the MIN of all max latencies */
if (min > fold->min)
fold->min = min;
if (fold->max == -1)
fold->max = max;
else if (max < fold->max)
fold->max = max;
fold->live = TRUE;
}
} else {
GST_LOG_OBJECT (pad, "latency query failed");
g_value_set_boolean (ret, FALSE);
}
return TRUE;
}
static void
decoder_query_latency_done (GstURIDecodeBin * dec, QueryFold * fold)
{
/* store max in query result */
gst_query_set_latency (fold->query, fold->live, fold->min, fold->max);
GST_DEBUG_OBJECT (dec,
"latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
", live %d", GST_TIME_ARGS (fold->min), GST_TIME_ARGS (fold->max),
fold->live);
}
/* we are seekable if all srcpads are seekable */
static gboolean
decoder_query_seeking_fold (const GValue * item, GValue * ret, QueryFold * fold)
{
GstPad *pad = g_value_get_object (item);
if (gst_pad_query (pad, fold->query)) {
gboolean seekable;
g_value_set_boolean (ret, TRUE);
gst_query_parse_seeking (fold->query, NULL, &seekable, NULL, NULL);
GST_DEBUG_OBJECT (pad, "got seekable %d", seekable);
if (fold->seekable)
fold->seekable = seekable;
}
return TRUE;
}
static void
decoder_query_seeking_done (GstURIDecodeBin * dec, QueryFold * fold)
{
GstFormat format;
gst_query_parse_seeking (fold->query, &format, NULL, NULL, NULL);
gst_query_set_seeking (fold->query, format, fold->seekable, 0, -1);
GST_DEBUG_OBJECT (dec, "seekable %d", fold->seekable);
}
/* generic fold, return first valid result */
static gboolean
decoder_query_generic_fold (const GValue * item, GValue * ret, QueryFold * fold)
{
GstPad *pad = g_value_get_object (item);
gboolean res;
if ((res = gst_pad_query (pad, fold->query))) {
g_value_set_boolean (ret, TRUE);
GST_DEBUG_OBJECT (pad, "answered query %p", fold->query);
}
/* and stop as soon as we have a valid result */
return !res;
}
/* we're a bin, the default query handler iterates sink elements, which we don't
* have normally. We should just query all source pads.
*/
static gboolean
gst_uri_decode_bin_query (GstElement * element, GstQuery * query)
{
GstURIDecodeBin *decoder;
gboolean res = FALSE;
GstIterator *iter;
GstIteratorFoldFunction fold_func;
QueryInitFunction fold_init = NULL;
QueryDoneFunction fold_done = NULL;
QueryFold fold_data;
GValue ret = { 0 };
gboolean default_ret = FALSE;
decoder = GST_URI_DECODE_BIN (element);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
/* iterate and collect durations */
fold_func = (GstIteratorFoldFunction) decoder_query_duration_fold;
fold_init = decoder_query_init;
fold_done = decoder_query_duration_done;
break;
case GST_QUERY_POSITION:
/* iterate and collect durations */
fold_func = (GstIteratorFoldFunction) decoder_query_position_fold;
fold_init = decoder_query_init;
fold_done = decoder_query_position_done;
break;
case GST_QUERY_LATENCY:
/* iterate and collect durations */
fold_func = (GstIteratorFoldFunction) decoder_query_latency_fold;
fold_init = decoder_query_init;
fold_done = decoder_query_latency_done;
default_ret = TRUE;
break;
case GST_QUERY_SEEKING:
/* iterate and collect durations */
fold_func = (GstIteratorFoldFunction) decoder_query_seeking_fold;
fold_init = decoder_query_init;
fold_done = decoder_query_seeking_done;
break;
default:
fold_func = (GstIteratorFoldFunction) decoder_query_generic_fold;
break;
}
fold_data.query = query;
g_value_init (&ret, G_TYPE_BOOLEAN);
g_value_set_boolean (&ret, default_ret);
iter = gst_element_iterate_src_pads (element);
GST_DEBUG_OBJECT (element, "Sending query %p (type %d) to src pads",
query, GST_QUERY_TYPE (query));
if (fold_init)
fold_init (decoder, &fold_data);
while (TRUE) {
GstIteratorResult ires;
ires = gst_iterator_fold (iter, fold_func, &ret, &fold_data);
switch (ires) {
case GST_ITERATOR_RESYNC:
gst_iterator_resync (iter);
if (fold_init)
fold_init (decoder, &fold_data);
g_value_set_boolean (&ret, default_ret);
break;
case GST_ITERATOR_OK:
case GST_ITERATOR_DONE:
res = g_value_get_boolean (&ret);
if (fold_done != NULL && res)
fold_done (decoder, &fold_data);
goto done;
default:
res = FALSE;
goto done;
}
}
done:
gst_iterator_free (iter);
return res;
}
static GstStateChangeReturn
gst_uri_decode_bin_change_state (GstElement * element,
GstStateChange transition)
{
GstStateChangeReturn ret;
GstURIDecodeBin *decoder;
decoder = GST_URI_DECODE_BIN (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
do_async_start (decoder);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
goto setup_failed;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
GST_DEBUG ("ready to paused");
if (!setup_source (decoder))
goto source_failed;
ret = GST_STATE_CHANGE_ASYNC;
/* And now sync the states of everything we added */
g_slist_foreach (decoder->decodebins,
(GFunc) gst_element_sync_state_with_parent, NULL);
if (decoder->typefind)
ret = gst_element_set_state (decoder->typefind, GST_STATE_PAUSED);
if (ret == GST_STATE_CHANGE_FAILURE)
goto setup_failed;
if (decoder->queue)
ret = gst_element_set_state (decoder->queue, GST_STATE_PAUSED);
if (ret == GST_STATE_CHANGE_FAILURE)
goto setup_failed;
if (decoder->source)
ret = gst_element_set_state (decoder->source, GST_STATE_PAUSED);
if (ret == GST_STATE_CHANGE_FAILURE)
goto setup_failed;
if (ret == GST_STATE_CHANGE_SUCCESS)
ret = GST_STATE_CHANGE_ASYNC;
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_DEBUG ("paused to ready");
remove_decoders (decoder, FALSE);
remove_source (decoder);
do_async_done (decoder);
g_list_free_full (decoder->missing_plugin_errors,
(GDestroyNotify) gst_message_unref);
decoder->missing_plugin_errors = NULL;
break;
case GST_STATE_CHANGE_READY_TO_NULL:
GST_DEBUG ("ready to null");
remove_decoders (decoder, TRUE);
remove_source (decoder);
break;
default:
break;
}
if (ret == GST_STATE_CHANGE_NO_PREROLL)
do_async_done (decoder);
return ret;
/* ERRORS */
source_failed:
{
do_async_done (decoder);
return GST_STATE_CHANGE_FAILURE;
}
setup_failed:
{
/* clean up leftover groups */
do_async_done (decoder);
return GST_STATE_CHANGE_FAILURE;
}
}
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