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gstreamer/subprojects/gst-plugins-base/gst/playback/gsturidecodebin.c
Thibault Saunier 1c4950718f discoverer: Fix discovering source that expose raw audio/video 
Exposes a "uridecodebin:post-stream-topology" property as the discoverer
needs to have topology information about all streams so we need
`uridecodebin` to always plug decodebins for that case.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3009>
2022-09-15 19:25:01 +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_slice_alloc0 (sizeof (GstURIDecodeBinStream));
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_slice_free (GstURIDecodeBinStream, 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);
/* 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;
}
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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