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gstreamer/subprojects/gst-plugins-base/gst/playback/gsturisourcebin.c
Edward Hervey 4c1d01ff57 playback: New playback elements are no longer experimental 
The API is not expected to change and it has been used extensively since 1.18.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3761>
2023-01-21 12:28:21 +00:00

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/* GStreamer
* Copyright (C) <2015> Jan Schmidt <jan@centricular.com>
* 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-urisourcebin
* @title: urisourcebin
*
* urisourcebin is an element for accessing URIs in a uniform manner.
*
* It handles selecting a URI source element and potentially download
* buffering for network sources. It produces one or more source pads,
* depending on the input source, for feeding to decoding chains or decodebin.
*
* The main configuration is via the #GstURISourceBin:uri property.
*
*/
#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_SOURCE_BIN \
(gst_uri_source_bin_get_type())
#define GST_URI_SOURCE_BIN(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_URI_SOURCE_BIN,GstURISourceBin))
#define GST_URI_SOURCE_BIN_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_URI_SOURCE_BIN,GstURISourceBinClass))
#define GST_IS_URI_SOURCE_BIN(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_URI_SOURCE_BIN))
#define GST_IS_URI_SOURCE_BIN_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_URI_SOURCE_BIN))
#define GST_URI_SOURCE_BIN_CAST(obj) ((GstURISourceBin *) (obj))
typedef struct _GstURISourceBin GstURISourceBin;
typedef struct _GstURISourceBinClass GstURISourceBinClass;
typedef struct _ChildSrcPadInfo ChildSrcPadInfo;
typedef struct _OutputSlotInfo OutputSlotInfo;
#define GST_URI_SOURCE_BIN_LOCK(urisrc) (g_mutex_lock(&((GstURISourceBin*)(urisrc))->lock))
#define GST_URI_SOURCE_BIN_UNLOCK(urisrc) (g_mutex_unlock(&((GstURISourceBin*)(urisrc))->lock))
#define BUFFERING_LOCK(ubin) G_STMT_START { \
GST_LOG_OBJECT (ubin, \
"buffering locking from thread %p", \
g_thread_self ()); \
g_mutex_lock (&GST_URI_SOURCE_BIN_CAST(ubin)->buffering_lock); \
GST_LOG_OBJECT (ubin, \
"buffering lock from thread %p", \
g_thread_self ()); \
} G_STMT_END
#define BUFFERING_UNLOCK(ubin) G_STMT_START { \
GST_LOG_OBJECT (ubin, \
"buffering unlocking from thread %p", \
g_thread_self ()); \
g_mutex_unlock (&GST_URI_SOURCE_BIN_CAST(ubin)->buffering_lock); \
} G_STMT_END
/* Track a source pad from the source element and the chain of (optional)
* elements that are linked to it up to the output slots */
struct _ChildSrcPadInfo
{
GstURISourceBin *urisrc;
/* Source pad this info is attached to (reffed) */
GstPad *src_pad;
/* An optional typefind */
GstElement *typefind;
/* Pre-parsebin buffering elements. Only present is parse-streams and
* downloading *or* ring-buffer-max-size */
GstElement *pre_parse_queue;
/* Post-parsebin multiqueue. Only present if parse-streams and buffering is
* required */
GstElement *multiqueue;
/* An optional demuxer or parsebin */
GstElement *demuxer;
gboolean demuxer_handles_buffering;
gboolean demuxer_streams_aware;
gboolean demuxer_is_parsebin;
/* list of output slots */
GList *outputs;
/* The following fields specify how this output should be handled */
/* use_downloadbuffer : TRUE if the content from the source should be
* downloaded with a downloadbuffer element */
gboolean use_downloadbuffer;
/* use_queue2: TRUE if the contents should be buffered through a queue2
* element */
gboolean use_queue2;
};
/* Output Slot:
*
* Handles everything related to outputing, including optional buffering.
*/
struct _OutputSlotInfo
{
ChildSrcPadInfo *linked_info; /* source pad info feeding this slot */
GstPad *originating_pad; /* Pad that created this OutputSlotInfo (ref held) */
GstPad *output_pad; /* Output ghost pad */
gboolean is_eos; /* Did EOS get fed into the buffering element */
GstElement *queue; /* queue2 or downloadbuffer */
GstPad *queue_sinkpad; /* Sink pad of the queue eleemnt */
gulong bitrate_changed_id; /* queue bitrate changed notification */
guint demuxer_event_probe_id;
};
/**
* GstURISourceBin
*
* urisourcebin element struct
*/
struct _GstURISourceBin
{
GstBin parent_instance;
GMutex lock; /* lock for constructing */
gchar *uri;
guint64 connection_speed;
gboolean activated; /* TRUE if the switch to PAUSED has been completed */
gboolean flushing; /* TRUE if switching from PAUSED to READY */
GCond activation_cond; /* Uses the urisourcebin lock */
gboolean is_stream;
gboolean is_adaptive;
guint64 buffer_duration; /* When buffering, buffer duration (ns) */
guint buffer_size; /* When buffering, buffer size (bytes) */
gboolean download;
gboolean use_buffering;
gdouble low_watermark;
gdouble high_watermark;
gboolean parse_streams;
GstElement *source;
GList *src_infos; /* List of ChildSrcPadInfo for the source */
guint numpads;
/* for dynamic sources */
guint src_np_sig_id; /* new-pad signal id */
guint64 ring_buffer_max_size; /* 0 means disabled */
GList *buffering_status; /* element currently buffering messages */
gint last_buffering_pct; /* Avoid sending buffering over and over */
GMutex buffering_lock;
GMutex buffering_post_lock;
};
struct _GstURISourceBinClass
{
GstBinClass parent_class;
/* emitted when all data has been drained out
* FIXME : What do we need this for ?? */
void (*drained) (GstElement * element);
/* emitted when all data has been fed into buffering slots (i.e the
* actual sources are done) */
void (*about_to_finish) (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_source_bin_debug);
#define GST_CAT_DEFAULT gst_uri_source_bin_debug
/* signals */
enum
{
SIGNAL_DRAINED,
SIGNAL_ABOUT_TO_FINISH,
SIGNAL_SOURCE_SETUP,
LAST_SIGNAL
};
/* properties */
#define DEFAULT_PROP_URI NULL
#define DEFAULT_PROP_SOURCE NULL
#define DEFAULT_CONNECTION_SPEED 0
#define DEFAULT_BUFFER_DURATION -1
#define DEFAULT_BUFFER_SIZE -1
#define DEFAULT_DOWNLOAD FALSE
#define DEFAULT_USE_BUFFERING TRUE
#define DEFAULT_RING_BUFFER_MAX_SIZE 0
#define DEFAULT_LOW_WATERMARK 0.01
#define DEFAULT_HIGH_WATERMARK 0.60
#define DEFAULT_PARSE_STREAMS FALSE
#define ACTUAL_DEFAULT_BUFFER_SIZE 10 * 1024 * 1024 /* The value used for byte limits when buffer-size == -1 */
#define ACTUAL_DEFAULT_BUFFER_DURATION 5 * GST_SECOND /* The value used for time limits when buffer-duration == -1 */
#define GET_BUFFER_SIZE(u) ((u)->buffer_size == -1 ? ACTUAL_DEFAULT_BUFFER_SIZE : (u)->buffer_size)
#define GET_BUFFER_DURATION(u) ((u)->buffer_duration == -1 ? ACTUAL_DEFAULT_BUFFER_DURATION : (u)->buffer_duration)
#define DEFAULT_CAPS (gst_static_caps_get (&default_raw_caps))
enum
{
PROP_0,
PROP_URI,
PROP_SOURCE,
PROP_CONNECTION_SPEED,
PROP_BUFFER_SIZE,
PROP_BUFFER_DURATION,
PROP_DOWNLOAD,
PROP_USE_BUFFERING,
PROP_RING_BUFFER_MAX_SIZE,
PROP_LOW_WATERMARK,
PROP_HIGH_WATERMARK,
PROP_STATISTICS,
PROP_PARSE_STREAMS,
};
#define CUSTOM_EOS_QUARK _custom_eos_quark_get ()
#define CUSTOM_EOS_QUARK_DATA "custom-eos"
static GQuark
_custom_eos_quark_get (void)
{
static gsize g_quark;
if (g_once_init_enter (&g_quark)) {
gsize quark =
(gsize) g_quark_from_static_string ("urisourcebin-custom-eos");
g_once_init_leave (&g_quark, quark);
}
return g_quark;
}
static void post_missing_plugin_error (GstElement * urisrc,
const gchar * element_name);
static guint gst_uri_source_bin_signals[LAST_SIGNAL] = { 0 };
GType gst_uri_source_bin_get_type (void);
#define gst_uri_source_bin_parent_class parent_class
G_DEFINE_TYPE (GstURISourceBin, gst_uri_source_bin, GST_TYPE_BIN);
#define _do_init \
GST_DEBUG_CATEGORY_INIT (gst_uri_source_bin_debug, "urisourcebin", 0, "URI source element"); \
playback_element_init (plugin);
GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (urisourcebin, "urisourcebin",
GST_RANK_NONE, GST_TYPE_URI_SOURCE_BIN, _do_init);
static void gst_uri_source_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_uri_source_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_uri_source_bin_finalize (GObject * obj);
static void handle_message (GstBin * bin, GstMessage * msg);
static gboolean gst_uri_source_bin_query (GstElement * element,
GstQuery * query);
static GstStateChangeReturn gst_uri_source_bin_change_state (GstElement *
element, GstStateChange transition);
static void handle_new_pad (ChildSrcPadInfo * info, GstPad * srcpad,
GstCaps * caps);
static gboolean setup_typefind (ChildSrcPadInfo * info);
static void expose_output_pad (GstURISourceBin * urisrc, GstPad * pad);
static OutputSlotInfo *new_output_slot (ChildSrcPadInfo * info,
GstPad * originating_pad);
static void free_output_slot (OutputSlotInfo * slot, GstURISourceBin * urisrc);
static void free_output_slot_async (GstURISourceBin * urisrc,
OutputSlotInfo * slot);
static GstPad *create_output_pad (OutputSlotInfo * slot, GstPad * pad);
static void remove_buffering_msgs (GstURISourceBin * bin, GstObject * src);
static void update_queue_values (GstURISourceBin * urisrc);
static GstStructure *get_queue_statistics (GstURISourceBin * urisrc);
static void
gst_uri_source_bin_class_init (GstURISourceBinClass * 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_source_bin_set_property;
gobject_class->get_property = gst_uri_source_bin_get_property;
gobject_class->finalize = gst_uri_source_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_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));
/**
* GstURISourceBin::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));
/**
* GstURISourceBin::use-buffering:
*
* Perform buffering using a queue2 element, and emit BUFFERING
* messages based on low-/high-percent thresholds of streaming data,
* such as adaptive-demuxer streams.
*
* When download buffering is activated and used for the current media
* type, this property does nothing.
*
*/
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));
/**
* GstURISourceBin::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));
/**
* GstURISourceBin::low-watermark
*
* Proportion of the queue size (either in bytes or time) for buffering
* to restart when crossed from above. Only used if use-buffering is TRUE.
*/
g_object_class_install_property (gobject_class, PROP_LOW_WATERMARK,
g_param_spec_double ("low-watermark", "Low watermark",
"Low threshold for buffering to start. Only used if use-buffering is True",
0.0, 1.0, DEFAULT_LOW_WATERMARK,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstURISourceBin::high-watermark
*
* Proportion of the queue size (either in bytes or time) to complete
* buffering. Only used if use-buffering is TRUE.
*/
g_object_class_install_property (gobject_class, PROP_HIGH_WATERMARK,
g_param_spec_double ("high-watermark", "High watermark",
"High threshold for buffering to finish. Only used if use-buffering is True",
0.0, 1.0, DEFAULT_HIGH_WATERMARK,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstURISourceBin::statistics
*
* A GStructure containing the following values based on the values from
* all the queue's contained in this urisourcebin.
*
* "minimum-byte-level" G_TYPE_UINT Minimum of the current byte levels
* "maximum-byte-level" G_TYPE_UINT Maximum of the current byte levels
* "average-byte-level" G_TYPE_UINT Average of the current byte levels
* "minimum-time-level" G_TYPE_UINT64 Minimum of the current time levels
* "maximum-time-level" G_TYPE_UINT64 Maximum of the current time levels
* "average-time-level" G_TYPE_UINT64 Average of the current time levels
*/
g_object_class_install_property (gobject_class, PROP_STATISTICS,
g_param_spec_boxed ("statistics", "Queue Statistics",
"A set of statistics over all the queue-like elements contained in "
"this element", GST_TYPE_STRUCTURE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* GstURISourceBin:parse-streams:
*
* A `parsebin` element will be used on all non-raw streams, and urisourcebin
* will output the elementary streams. Recommended when buffering is used
* since it will provide accurate buffering levels.
*
* Since: 1.22
*/
g_object_class_install_property (gobject_class, PROP_PARSE_STREAMS,
g_param_spec_boolean ("parse-streams", "Parse Streams",
"Extract the elementary streams of non-raw sources",
DEFAULT_PARSE_STREAMS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstURISourceBin::drained:
*
* This signal is emitted when the data for the current uri is played.
*/
gst_uri_source_bin_signals[SIGNAL_DRAINED] =
g_signal_new ("drained", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstURISourceBinClass, drained), NULL, NULL, NULL,
G_TYPE_NONE, 0, G_TYPE_NONE);
/**
* GstURISourceBin::about-to-finish:
*
* This signal is emitted when the data for the current uri is played.
*/
gst_uri_source_bin_signals[SIGNAL_ABOUT_TO_FINISH] =
g_signal_new ("about-to-finish", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstURISourceBinClass, about_to_finish), NULL, NULL, NULL,
G_TYPE_NONE, 0, G_TYPE_NONE);
/**
* GstURISourceBin::source-setup:
* @bin: the urisourcebin.
* @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.
*
* Since: 1.6.1
*/
gst_uri_source_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_pad_template (gstelement_class,
gst_static_pad_template_get (&srctemplate));
gst_element_class_set_static_metadata (gstelement_class,
"URI reader", "Generic/Bin/Source",
"Download and buffer a URI as needed",
"Jan Schmidt <jan@centricular.com>");
gstelement_class->query = GST_DEBUG_FUNCPTR (gst_uri_source_bin_query);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_uri_source_bin_change_state);
gstbin_class->handle_message = GST_DEBUG_FUNCPTR (handle_message);
}
static void
gst_uri_source_bin_init (GstURISourceBin * urisrc)
{
g_mutex_init (&urisrc->lock);
g_mutex_init (&urisrc->buffering_lock);
g_mutex_init (&urisrc->buffering_post_lock);
g_cond_init (&urisrc->activation_cond);
urisrc->uri = g_strdup (DEFAULT_PROP_URI);
urisrc->connection_speed = DEFAULT_CONNECTION_SPEED;
urisrc->buffer_duration = DEFAULT_BUFFER_DURATION;
urisrc->buffer_size = DEFAULT_BUFFER_SIZE;
urisrc->download = DEFAULT_DOWNLOAD;
urisrc->use_buffering = DEFAULT_USE_BUFFERING;
urisrc->ring_buffer_max_size = DEFAULT_RING_BUFFER_MAX_SIZE;
urisrc->last_buffering_pct = -1;
urisrc->low_watermark = DEFAULT_LOW_WATERMARK;
urisrc->high_watermark = DEFAULT_HIGH_WATERMARK;
GST_OBJECT_FLAG_SET (urisrc,
GST_ELEMENT_FLAG_SOURCE | GST_BIN_FLAG_STREAMS_AWARE);
gst_bin_set_suppressed_flags (GST_BIN (urisrc),
GST_ELEMENT_FLAG_SOURCE | GST_ELEMENT_FLAG_SINK);
}
static void
gst_uri_source_bin_finalize (GObject * obj)
{
GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (obj);
g_mutex_clear (&urisrc->lock);
g_mutex_clear (&urisrc->buffering_lock);
g_mutex_clear (&urisrc->buffering_post_lock);
g_free (urisrc->uri);
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
static void
gst_uri_source_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (object);
switch (prop_id) {
case PROP_URI:
GST_OBJECT_LOCK (urisrc);
g_free (urisrc->uri);
urisrc->uri = g_value_dup_string (value);
GST_OBJECT_UNLOCK (urisrc);
break;
case PROP_CONNECTION_SPEED:
GST_OBJECT_LOCK (urisrc);
urisrc->connection_speed = g_value_get_uint64 (value) * 1000;
GST_OBJECT_UNLOCK (urisrc);
break;
case PROP_BUFFER_SIZE:
urisrc->buffer_size = g_value_get_int (value);
update_queue_values (urisrc);
break;
case PROP_BUFFER_DURATION:
urisrc->buffer_duration = g_value_get_int64 (value);
update_queue_values (urisrc);
break;
case PROP_DOWNLOAD:
urisrc->download = g_value_get_boolean (value);
break;
case PROP_USE_BUFFERING:
urisrc->use_buffering = g_value_get_boolean (value);
break;
case PROP_RING_BUFFER_MAX_SIZE:
urisrc->ring_buffer_max_size = g_value_get_uint64 (value);
break;
case PROP_LOW_WATERMARK:
urisrc->low_watermark = g_value_get_double (value);
update_queue_values (urisrc);
break;
case PROP_HIGH_WATERMARK:
urisrc->high_watermark = g_value_get_double (value);
update_queue_values (urisrc);
break;
case PROP_PARSE_STREAMS:
urisrc->parse_streams = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_uri_source_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (object);
switch (prop_id) {
case PROP_URI:
GST_OBJECT_LOCK (urisrc);
g_value_set_string (value, urisrc->uri);
GST_OBJECT_UNLOCK (urisrc);
break;
case PROP_SOURCE:
GST_OBJECT_LOCK (urisrc);
g_value_set_object (value, urisrc->source);
GST_OBJECT_UNLOCK (urisrc);
break;
case PROP_CONNECTION_SPEED:
GST_OBJECT_LOCK (urisrc);
g_value_set_uint64 (value, urisrc->connection_speed / 1000);
GST_OBJECT_UNLOCK (urisrc);
break;
case PROP_BUFFER_SIZE:
GST_OBJECT_LOCK (urisrc);
g_value_set_int (value, urisrc->buffer_size);
GST_OBJECT_UNLOCK (urisrc);
break;
case PROP_BUFFER_DURATION:
GST_OBJECT_LOCK (urisrc);
g_value_set_int64 (value, urisrc->buffer_duration);
GST_OBJECT_UNLOCK (urisrc);
break;
case PROP_DOWNLOAD:
g_value_set_boolean (value, urisrc->download);
break;
case PROP_USE_BUFFERING:
g_value_set_boolean (value, urisrc->use_buffering);
break;
case PROP_RING_BUFFER_MAX_SIZE:
g_value_set_uint64 (value, urisrc->ring_buffer_max_size);
break;
case PROP_LOW_WATERMARK:
g_value_set_double (value, urisrc->low_watermark);
break;
case PROP_HIGH_WATERMARK:
g_value_set_double (value, urisrc->high_watermark);
break;
case PROP_STATISTICS:
g_value_take_boxed (value, get_queue_statistics (urisrc));
break;
case PROP_PARSE_STREAMS:
g_value_set_boolean (value, urisrc->parse_streams);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
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;
}
static GstPadProbeReturn
demux_pad_events (GstPad * pad, GstPadProbeInfo * info, OutputSlotInfo * slot);
/* CALL WITH URISOURCEBIN LOCK */
static void
free_child_src_pad_info (ChildSrcPadInfo * info, GstURISourceBin * urisrc)
{
g_assert (info->src_pad);
GST_DEBUG_OBJECT (urisrc,
"Freeing ChildSrcPadInfo for %" GST_PTR_FORMAT, info->src_pad);
if (info->typefind) {
gst_element_set_state (info->typefind, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (urisrc), info->typefind);
}
gst_object_unref (info->src_pad);
if (info->demuxer) {
GST_DEBUG_OBJECT (urisrc, "Removing demuxer");
gst_element_set_state (info->demuxer, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (urisrc), info->demuxer);
}
g_list_foreach (info->outputs, (GFunc) free_output_slot, urisrc);
g_list_free (info->outputs);
if (info->multiqueue) {
GST_DEBUG_OBJECT (urisrc, "Removing multiqueue");
gst_element_set_state (info->multiqueue, GST_STATE_NULL);
remove_buffering_msgs (urisrc, GST_OBJECT_CAST (info->multiqueue));
gst_bin_remove (GST_BIN_CAST (urisrc), info->multiqueue);
}
if (info->pre_parse_queue) {
gst_element_set_state (info->pre_parse_queue, GST_STATE_NULL);
remove_buffering_msgs (urisrc, GST_OBJECT_CAST (info->pre_parse_queue));
gst_bin_remove (GST_BIN_CAST (urisrc), info->pre_parse_queue);
}
g_free (info);
}
static ChildSrcPadInfo *
get_cspi_for_pad (GstURISourceBin * urisrc, GstPad * pad)
{
GList *iter;
for (iter = urisrc->src_infos; iter; iter = iter->next) {
ChildSrcPadInfo *info = iter->data;
if (info->src_pad == pad)
return info;
}
return NULL;
}
static ChildSrcPadInfo *
new_child_src_pad_info (GstURISourceBin * urisrc, GstPad * pad)
{
ChildSrcPadInfo *info;
GST_LOG_OBJECT (urisrc, "New ChildSrcPadInfo for %" GST_PTR_FORMAT, pad);
info = g_new0 (ChildSrcPadInfo, 1);
info->urisrc = urisrc;
info->src_pad = gst_object_ref (pad);
urisrc->src_infos = g_list_append (urisrc->src_infos, info);
return info;
}
/* Called by the signal handlers when a demuxer has produced a new stream */
static void
new_demuxer_pad_added_cb (GstElement * element, GstPad * pad,
ChildSrcPadInfo * info)
{
GstURISourceBin *urisrc = info->urisrc;
OutputSlotInfo *slot;
GstPad *output_pad;
GST_DEBUG_OBJECT (element, "New pad %" GST_PTR_FORMAT, pad);
GST_URI_SOURCE_BIN_LOCK (urisrc);
/* Double-check that the demuxer is streams-aware by checking if it posted a
* collection */
if (info->demuxer && !info->demuxer_is_parsebin
&& !info->demuxer_streams_aware) {
GST_ELEMENT_ERROR (urisrc, CORE, MISSING_PLUGIN, (NULL),
("Adaptive demuxer is not streams-aware, check your installation"));
}
/* If the demuxer handles buffering and is streams-aware, we can expose it
as-is directly. We still add an event probe to deal with EOS */
slot = new_output_slot (info, pad);
output_pad = gst_object_ref (slot->output_pad);
slot->demuxer_event_probe_id =
gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM |
GST_PAD_PROBE_TYPE_EVENT_FLUSH, (GstPadProbeCallback) demux_pad_events,
slot, NULL);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
expose_output_pad (urisrc, output_pad);
gst_object_unref (output_pad);
}
/* Called with lock held */
static gboolean
all_slots_are_eos (GstURISourceBin * urisrc)
{
GList *tmp;
for (tmp = urisrc->src_infos; tmp; tmp = tmp->next) {
ChildSrcPadInfo *cspi = tmp->data;
GList *iter2;
for (iter2 = cspi->outputs; iter2; iter2 = iter2->next) {
OutputSlotInfo *slot = (OutputSlotInfo *) iter2->data;
if (slot->is_eos == FALSE)
return FALSE;
}
}
return TRUE;
}
/* CALL WITH URISOURCEBIN LOCK */
static OutputSlotInfo *
output_slot_for_originating_pad (ChildSrcPadInfo * info,
GstPad * originating_pad)
{
GList *iter;
for (iter = info->outputs; iter; iter = iter->next) {
OutputSlotInfo *slot = iter->data;
if (slot->originating_pad == originating_pad)
return slot;
}
return NULL;
}
static GstPadProbeReturn
demux_pad_events (GstPad * pad, GstPadProbeInfo * info, OutputSlotInfo * slot)
{
GstURISourceBin *urisrc = slot->linked_info->urisrc;
GstPadProbeReturn ret = GST_PAD_PROBE_OK;
GstEvent *ev = GST_PAD_PROBE_INFO_EVENT (info);
GST_URI_SOURCE_BIN_LOCK (urisrc);
switch (GST_EVENT_TYPE (ev)) {
case GST_EVENT_EOS:
{
gboolean all_streams_eos;
GST_LOG_OBJECT (urisrc, "EOS on pad %" GST_PTR_FORMAT, pad);
BUFFERING_LOCK (urisrc);
/* Mark that we fed an EOS to this slot */
slot->is_eos = TRUE;
all_streams_eos = all_slots_are_eos (urisrc);
BUFFERING_UNLOCK (urisrc);
if (slot->queue)
/* EOS means this element is no longer buffering */
remove_buffering_msgs (urisrc, GST_OBJECT_CAST (slot->queue));
if (all_streams_eos) {
GST_DEBUG_OBJECT (urisrc, "Posting about-to-finish");
g_signal_emit (urisrc,
gst_uri_source_bin_signals[SIGNAL_ABOUT_TO_FINISH], 0, NULL);
}
}
break;
case GST_EVENT_STREAM_START:
{
/* This is a temporary hack to notify downstream decodebin3 to *not*
* plug in an extra parsebin */
if (slot->linked_info && slot->linked_info->demuxer_is_parsebin) {
GstStructure *s;
GST_PAD_PROBE_INFO_DATA (info) = ev = gst_event_make_writable (ev);
s = (GstStructure *) gst_event_get_structure (ev);
gst_structure_set (s, "urisourcebin-parsed-data", G_TYPE_BOOLEAN, TRUE,
NULL);
}
}
/* PASSTHROUGH */
case GST_EVENT_FLUSH_STOP:
BUFFERING_LOCK (urisrc);
slot->is_eos = FALSE;
BUFFERING_UNLOCK (urisrc);
break;
default:
break;
}
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
return ret;
}
static GstPadProbeReturn
pre_queue_event_probe (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
{
GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (user_data);
GstPadProbeReturn ret = GST_PAD_PROBE_OK;
GstEvent *ev = GST_PAD_PROBE_INFO_EVENT (info);
switch (GST_EVENT_TYPE (ev)) {
case GST_EVENT_EOS:
{
GST_LOG_OBJECT (urisrc, "EOS on pad %" GST_PTR_FORMAT, pad);
GST_DEBUG_OBJECT (urisrc, "POSTING ABOUT TO FINISH");
g_signal_emit (urisrc,
gst_uri_source_bin_signals[SIGNAL_ABOUT_TO_FINISH], 0, NULL);
}
break;
default:
break;
}
return ret;
}
static GstStructure *
get_queue_statistics (GstURISourceBin * urisrc)
{
GstStructure *ret = NULL;
guint min_byte_level = 0, max_byte_level = 0;
guint64 min_time_level = 0, max_time_level = 0;
gdouble avg_byte_level = 0., avg_time_level = 0.;
guint i = 0;
GList *iter, *cur;
GST_URI_SOURCE_BIN_LOCK (urisrc);
for (iter = urisrc->src_infos; iter; iter = iter->next) {
ChildSrcPadInfo *info = iter->data;
for (cur = info->outputs; cur; cur = cur->next) {
OutputSlotInfo *slot = (OutputSlotInfo *) (cur->data);
guint byte_limit = 0;
guint64 time_limit = 0;
if (!slot->queue)
continue;
g_object_get (slot->queue, "current-level-bytes", &byte_limit,
"current-level-time", &time_limit, NULL);
if (byte_limit < min_byte_level)
min_byte_level = byte_limit;
if (byte_limit > max_byte_level)
max_byte_level = byte_limit;
avg_byte_level = (avg_byte_level * i + byte_limit) / (gdouble) (i + 1);
if (time_limit < min_time_level)
min_time_level = time_limit;
if (time_limit > max_time_level)
max_time_level = time_limit;
avg_time_level = (avg_time_level * i + time_limit) / (gdouble) (i + 1);
i++;
}
}
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
ret = gst_structure_new ("application/x-urisourcebin-stats",
"minimum-byte-level", G_TYPE_UINT, (guint) min_byte_level,
"maximum-byte-level", G_TYPE_UINT, (guint) max_byte_level,
"average-byte-level", G_TYPE_UINT, (guint) avg_byte_level,
"minimum-time-level", G_TYPE_UINT64, (guint64) min_time_level,
"maximum-time-level", G_TYPE_UINT64, (guint64) max_time_level,
"average-time-level", G_TYPE_UINT64, (guint64) avg_time_level, NULL);
return ret;
}
static void
update_queue_values (GstURISourceBin * urisrc)
{
gint64 duration;
guint buffer_size;
gdouble low_watermark, high_watermark;
guint64 cumulative_bitrate = 0;
GList *iter, *cur;
GST_URI_SOURCE_BIN_LOCK (urisrc);
duration = GET_BUFFER_DURATION (urisrc);
buffer_size = GET_BUFFER_SIZE (urisrc);
low_watermark = urisrc->low_watermark;
high_watermark = urisrc->high_watermark;
for (iter = urisrc->src_infos; iter; iter = iter->next) {
ChildSrcPadInfo *info = iter->data;
for (cur = info->outputs; cur; cur = cur->next) {
OutputSlotInfo *slot = (OutputSlotInfo *) (cur->data);
guint64 bitrate = 0;
if (!slot->queue)
continue;
if (g_object_class_find_property (G_OBJECT_GET_CLASS (slot->queue),
"bitrate")) {
g_object_get (G_OBJECT (slot->queue), "bitrate", &bitrate, NULL);
}
if (bitrate > 0)
cumulative_bitrate += bitrate;
else {
GST_TRACE_OBJECT (urisrc,
"Unknown bitrate detected from %" GST_PTR_FORMAT
", resetting all bitrates", slot->queue);
cumulative_bitrate = 0;
break;
}
}
}
GST_DEBUG_OBJECT (urisrc, "recalculating queue limits with cumulative "
"bitrate %" G_GUINT64_FORMAT ", buffer size %u, buffer duration %"
G_GINT64_FORMAT, cumulative_bitrate, buffer_size, duration);
for (iter = urisrc->src_infos; iter; iter = iter->next) {
ChildSrcPadInfo *info = iter->data;
for (cur = info->outputs; cur; cur = cur->next) {
OutputSlotInfo *slot = (OutputSlotInfo *) (cur->data);
guint byte_limit;
if (!slot->queue)
continue;
if (cumulative_bitrate > 0
&& g_object_class_find_property (G_OBJECT_GET_CLASS (slot->queue),
"bitrate")) {
guint64 bitrate;
g_object_get (G_OBJECT (slot->queue), "bitrate", &bitrate, NULL);
byte_limit =
gst_util_uint64_scale (buffer_size, bitrate, cumulative_bitrate);
} else {
/* if not all queue's have valid bitrates, use the buffer-size as the
* limit */
byte_limit = buffer_size;
}
GST_DEBUG_OBJECT (urisrc,
"calculated new limits for queue-like element %" GST_PTR_FORMAT
", bytes:%u, time:%" G_GUINT64_FORMAT
", low-watermark:%f, high-watermark:%f",
slot->queue, byte_limit, (guint64) duration, low_watermark,
high_watermark);
g_object_set (G_OBJECT (slot->queue), "max-size-bytes", byte_limit,
"max-size-time", (guint64) duration, "low-watermark", low_watermark,
"high-watermark", high_watermark, NULL);
}
}
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
}
static void
on_queue_bitrate_changed (GstElement * queue, GParamSpec * pspec,
gpointer user_data)
{
GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (user_data);
gst_element_call_async (GST_ELEMENT (urisrc),
(GstElementCallAsyncFunc) update_queue_values, NULL, NULL);
}
static void
setup_downloadbuffer (GstURISourceBin * urisrc, GstElement * downloadbuffer)
{
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 (urisrc, "enable download buffering in %s (%s, %s, %s)",
temp_template, tmp_dir, prgname, filename);
/* configure progressive download for selected media types */
g_object_set (downloadbuffer, "temp-template", temp_template, NULL);
g_free (filename);
g_free (temp_template);
}
static void
setup_multiqueue (GstURISourceBin * urisrc, ChildSrcPadInfo * info,
GstElement * multiqueue)
{
if (info->use_downloadbuffer || !urisrc->is_stream) {
/* If we have a downloadbuffer we will let that one deal with buffering,
and we only use multiqueue for dealing with interleave */
g_object_set (info->multiqueue, "use-buffering", FALSE, NULL);
} else {
/* Else we set the minimum interleave time of multiqueue to the required
* buffering duration and ask it to report buffering */
g_object_set (info->multiqueue, "use-buffering", TRUE,
"min-interleave-time", GET_BUFFER_DURATION (urisrc), NULL);
}
/* Common properties */
g_object_set (info->multiqueue,
"sync-by-running-time", TRUE,
"use-interleave", TRUE,
"max-size-bytes", 0,
"max-size-buffers", 0,
"low-watermark", urisrc->low_watermark,
"high-watermark", urisrc->high_watermark, NULL);
gst_bin_add (GST_BIN_CAST (urisrc), info->multiqueue);
gst_element_sync_state_with_parent (info->multiqueue);
}
/* Called with lock held */
static OutputSlotInfo *
new_output_slot (ChildSrcPadInfo * info, GstPad * originating_pad)
{
GstURISourceBin *urisrc = info->urisrc;
OutputSlotInfo *slot;
GstPad *srcpad;
GstElement *queue = NULL;
const gchar *elem_name;
gboolean use_downloadbuffer;
GST_DEBUG_OBJECT (urisrc,
"use_queue2:%d use_downloadbuffer:%d, demuxer:%d, originating_pad:%"
GST_PTR_FORMAT, info->use_queue2, info->use_downloadbuffer,
info->demuxer != NULL, originating_pad);
slot = g_new0 (OutputSlotInfo, 1);
slot->linked_info = info;
/* If a demuxer/parsebin is present, then the downloadbuffer will have been handled before that */
use_downloadbuffer = info->use_downloadbuffer && !info->demuxer;
/* If parsebin is used, we might have to go through a multiqueue */
if (urisrc->parse_streams && (info->use_queue2 || info->use_downloadbuffer
|| !urisrc->is_stream)) {
GST_DEBUG_OBJECT (urisrc, "Using multiqueue");
if (!info->multiqueue) {
GST_DEBUG_OBJECT (urisrc,
"Creating multiqueue for handling elementary streams");
elem_name = "multiqueue";
info->multiqueue = gst_element_factory_make (elem_name, NULL);
if (!info->multiqueue)
goto no_buffer_element;
setup_multiqueue (urisrc, info, info->multiqueue);
}
slot->queue_sinkpad =
gst_element_request_pad_simple (info->multiqueue, "sink_%u");
srcpad = gst_pad_get_single_internal_link (slot->queue_sinkpad);
slot->output_pad = create_output_pad (slot, srcpad);
gst_object_unref (srcpad);
gst_pad_link (originating_pad, slot->queue_sinkpad);
}
/* If buffering is required, create the element. If downloadbuffer is
* required, it will take precedence over queue2 */
else if (use_downloadbuffer || info->use_queue2) {
if (use_downloadbuffer)
elem_name = "downloadbuffer";
else
elem_name = "queue2";
queue = gst_element_factory_make (elem_name, NULL);
if (!queue)
goto no_buffer_element;
slot->queue = queue;
slot->bitrate_changed_id =
g_signal_connect (G_OBJECT (queue), "notify::bitrate",
(GCallback) on_queue_bitrate_changed, urisrc);
if (use_downloadbuffer) {
setup_downloadbuffer (urisrc, slot->queue);
} else {
g_object_set (queue, "use-buffering", urisrc->use_buffering, NULL);
if (info->demuxer) {
/* If a adaptive demuxer or parsebin is used, use more accurate information */
g_object_set (queue, "use-tags-bitrate", TRUE, "use-rate-estimate",
FALSE, NULL);
} else {
GST_DEBUG_OBJECT (queue,
"Setting ring-buffer-max-size %" G_GUINT64_FORMAT,
urisrc->ring_buffer_max_size);
/* Else allow ring-buffer-max-size setting to be used */
g_object_set (queue, "ring-buffer-max-size",
urisrc->ring_buffer_max_size, NULL);
}
/* Disable max-size-buffers - queue based on data rate to the default time limit */
g_object_set (queue, "max-size-buffers", 0, NULL);
/* Don't start buffering until the queue is empty (< 1%).
* Start playback when the queue is 60% full, leaving a bit more room
* for upstream to push more without getting bursty */
g_object_set (queue, "low-percent", 1, "high-percent", 60, NULL);
g_object_set (queue, "low-watermark", urisrc->low_watermark,
"high-watermark", urisrc->high_watermark, NULL);
}
/* set the necessary limits on the queue-like elements */
g_object_set (queue, "max-size-bytes", GET_BUFFER_SIZE (urisrc),
"max-size-time", (guint64) GET_BUFFER_DURATION (urisrc), NULL);
gst_bin_add (GST_BIN_CAST (urisrc), queue);
gst_element_sync_state_with_parent (queue);
slot->queue_sinkpad = gst_element_get_static_pad (queue, "sink");
/* get the new raw srcpad */
srcpad = gst_element_get_static_pad (queue, "src");
slot->output_pad = create_output_pad (slot, srcpad);
gst_object_unref (srcpad);
gst_pad_link (originating_pad, slot->queue_sinkpad);
} else {
/* Expose pad directly */
slot->output_pad = create_output_pad (slot, originating_pad);
}
slot->originating_pad = gst_object_ref (originating_pad);
/* save output slot so we can remove it later */
info->outputs = g_list_append (info->outputs, slot);
GST_DEBUG_OBJECT (urisrc,
"New output_pad %" GST_PTR_FORMAT " for originating pad %" GST_PTR_FORMAT,
slot->output_pad, originating_pad);
return slot;
no_buffer_element:
{
g_free (slot);
post_missing_plugin_error (GST_ELEMENT_CAST (urisrc), elem_name);
return NULL;
}
}
static GstPadProbeReturn
source_pad_event_probe (GstPad * pad, GstPadProbeInfo * info,
gpointer user_data)
{
GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
OutputSlotInfo *slot = user_data;
GstURISourceBin *urisrc = slot->linked_info->urisrc;
GST_LOG_OBJECT (pad, "%" GST_PTR_FORMAT, event);
/* A custom EOS will be received if an adaptive demuxer source pad removed a
* pad and buffering was present on that slot */
if (GST_EVENT_TYPE (event) == GST_EVENT_EOS &&
gst_mini_object_get_qdata (GST_MINI_OBJECT_CAST (event),
CUSTOM_EOS_QUARK)) {
GstPadProbeReturn probe_ret = GST_PAD_PROBE_DROP;
GST_DEBUG_OBJECT (pad, "we received custom EOS");
/* remove custom-eos */
gst_mini_object_set_qdata (GST_MINI_OBJECT_CAST (event), CUSTOM_EOS_QUARK,
NULL, NULL);
GST_URI_SOURCE_BIN_LOCK (urisrc);
if (slot->is_eos) {
/* linked_info is old input which is still linked without removal */
GST_DEBUG_OBJECT (pad, "push actual EOS");
gst_pad_push_event (slot->output_pad, event);
probe_ret = GST_PAD_PROBE_HANDLED;
}
/* And finally remove the output. This is done asynchronously since we can't
* do it from the streaming thread */
free_output_slot_async (urisrc, slot);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
return probe_ret;
}
/* never drop events */
return GST_PAD_PROBE_OK;
}
/* called when we found a raw pad to expose. We set up a
* padprobe to detect EOS before exposing the pad.
* Called with LOCK held. */
static GstPad *
create_output_pad (OutputSlotInfo * slot, GstPad * pad)
{
GstURISourceBin *urisrc = slot->linked_info->urisrc;
GstPad *newpad;
GstPadTemplate *pad_tmpl;
gchar *padname;
/* If the output slot does buffering, add a probe to detect drainage */
if (slot->queue)
gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
source_pad_event_probe, slot, NULL);
pad_tmpl = gst_static_pad_template_get (&srctemplate);
padname = g_strdup_printf ("src_%u", urisrc->numpads);
urisrc->numpads++;
newpad = gst_ghost_pad_new_from_template (padname, pad, pad_tmpl);
gst_object_unref (pad_tmpl);
g_free (padname);
GST_DEBUG_OBJECT (urisrc, "Created output pad %s:%s for pad %s:%s",
GST_DEBUG_PAD_NAME (newpad), GST_DEBUG_PAD_NAME (pad));
return newpad;
}
static GstPadProbeReturn
expose_block_probe (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
{
GstURISourceBin *urisrc = (GstURISourceBin *) user_data;
gboolean expose = FALSE;
GST_DEBUG_OBJECT (pad, "blocking");
GST_URI_SOURCE_BIN_LOCK (urisrc);
while (!urisrc->activated && !urisrc->flushing) {
GST_DEBUG_OBJECT (urisrc, "activated:%d flushing:%d", urisrc->activated,
urisrc->flushing);
g_cond_wait (&urisrc->activation_cond, &urisrc->lock);
}
GST_DEBUG_OBJECT (urisrc, "activated:%d flushing:%d", urisrc->activated,
urisrc->flushing);
if (!urisrc->flushing)
expose = TRUE;
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
if (expose)
gst_element_add_pad (GST_ELEMENT_CAST (urisrc), pad);
GST_DEBUG_OBJECT (pad, "Done blocking, removing probe");
return GST_PAD_PROBE_REMOVE;
}
static void
expose_output_pad (GstURISourceBin * urisrc, GstPad * pad)
{
GstPad *target;
if (gst_object_has_as_parent (GST_OBJECT (pad), GST_OBJECT (urisrc)))
return; /* Pad is already exposed */
target = gst_ghost_pad_get_target (GST_GHOST_PAD (pad));
gst_pad_sticky_events_foreach (target, copy_sticky_events, pad);
gst_object_unref (target);
gst_pad_set_active (pad, TRUE);
GST_URI_SOURCE_BIN_LOCK (urisrc);
if (!urisrc->activated) {
GST_DEBUG_OBJECT (urisrc, "Not fully activated, adding pad once PAUSED !");
gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
expose_block_probe, urisrc, NULL);
pad = NULL;
}
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
if (pad) {
GST_DEBUG_OBJECT (urisrc, "Exposing pad %" GST_PTR_FORMAT, pad);
gst_element_add_pad (GST_ELEMENT_CAST (urisrc), pad);
}
}
static void
demuxer_pad_removed_cb (GstElement * element, GstPad * pad,
ChildSrcPadInfo * info)
{
GstURISourceBin *urisrc;
OutputSlotInfo *slot;
/* we only care about srcpads */
if (!GST_PAD_IS_SRC (pad))
return;
urisrc = info->urisrc;
GST_DEBUG_OBJECT (urisrc, "pad removed name: <%s:%s>",
GST_DEBUG_PAD_NAME (pad));
GST_URI_SOURCE_BIN_LOCK (urisrc);
slot = output_slot_for_originating_pad (info, pad);
g_assert (slot);
gst_pad_remove_probe (pad, slot->demuxer_event_probe_id);
slot->demuxer_event_probe_id = 0;
if (slot->queue) {
gboolean was_eos;
/* Propagate custom EOS to buffering elements. The slot will be removed when
* it is received on the output of the buffering elements */
BUFFERING_LOCK (urisrc);
/* Unlink this pad from its output slot and send a fake EOS event
* to drain the queue */
was_eos = slot->is_eos;
slot->is_eos = TRUE;
BUFFERING_UNLOCK (urisrc);
remove_buffering_msgs (urisrc, GST_OBJECT_CAST (slot->queue));
if (!was_eos) {
GstStructure *s;
GstEvent *event;
event = gst_event_new_eos ();
s = gst_event_writable_structure (event);
gst_structure_set (s, "urisourcebin-custom-eos", G_TYPE_BOOLEAN, TRUE,
NULL);
gst_pad_send_event (slot->queue_sinkpad, event);
}
} else {
GST_LOG_OBJECT (urisrc,
"No buffering involved, removing output slot immediately");
/* Remove output slot immediately */
info->outputs = g_list_remove (info->outputs, slot);
free_output_slot (slot, urisrc);
}
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
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.
*/
static GstElement *
gen_source_element (GstURISourceBin * urisrc)
{
GObjectClass *source_class;
GstElement *source;
GParamSpec *pspec;
GstQuery *query;
GstSchedulingFlags flags;
GError *err = NULL;
if (!urisrc->uri)
goto no_uri;
GST_LOG_OBJECT (urisrc, "finding source for %s", urisrc->uri);
if (!gst_uri_is_valid (urisrc->uri))
goto invalid_uri;
if (IS_BLACKLISTED_URI (urisrc->uri))
goto uri_blacklisted;
source = gst_element_make_from_uri (GST_URI_SRC, urisrc->uri, NULL, &err);
if (!source)
goto no_source;
GST_LOG_OBJECT (urisrc, "found source type %s", G_OBJECT_TYPE_NAME (source));
urisrc->is_stream = IS_STREAM_URI (urisrc->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))
urisrc->is_stream = TRUE;
}
gst_query_unref (query);
source_class = G_OBJECT_GET_CLASS (source);
if (urisrc->is_stream) {
/* Live sources are not streamable */
pspec = g_object_class_find_property (source_class, "is-live");
if (pspec && G_PARAM_SPEC_VALUE_TYPE (pspec) == G_TYPE_BOOLEAN) {
gboolean is_live;
g_object_get (G_OBJECT (source), "is-live", &is_live, NULL);
if (is_live)
urisrc->is_stream = FALSE;
}
}
GST_LOG_OBJECT (urisrc, "source is stream: %d", urisrc->is_stream);
pspec = g_object_class_find_property (source_class, "connection-speed");
if (pspec != NULL) {
guint64 speed = urisrc->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 (urisrc,
"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 (urisrc,
"setting connection-speed=%" G_GUINT64_FORMAT " to source element",
speed);
}
}
return source;
/* ERRORS */
no_uri:
{
GST_ELEMENT_ERROR (urisrc, RESOURCE, NOT_FOUND,
(_("No URI specified to play from.")), (NULL));
return NULL;
}
invalid_uri:
{
GST_ELEMENT_ERROR (urisrc, RESOURCE, NOT_FOUND,
(_("Invalid URI \"%s\"."), urisrc->uri), (NULL));
g_clear_error (&err);
return NULL;
}
uri_blacklisted:
{
GST_ELEMENT_ERROR (urisrc, 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 (urisrc->uri);
if (prot == NULL)
goto invalid_uri;
gst_element_post_message (GST_ELEMENT_CAST (urisrc),
gst_missing_uri_source_message_new (GST_ELEMENT (urisrc), prot));
GST_ELEMENT_ERROR (urisrc, CORE, MISSING_PLUGIN,
(_("No URI handler implemented for \"%s\"."), prot), (NULL));
g_free (prot);
} else {
GST_ELEMENT_ERROR (urisrc, RESOURCE, NOT_FOUND,
("%s", (err) ? err->message : "URI was not accepted by any element"),
("No element accepted URI '%s'", urisrc->uri));
}
g_clear_error (&err);
return NULL;
}
}
static gboolean
is_all_raw_caps (GstCaps * caps, GstCaps * rawcaps, gboolean * all_raw)
{
GstCaps *intersection;
gint capssize;
gboolean res = FALSE;
if (caps == NULL)
return FALSE;
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);
*all_raw = !gst_caps_is_empty (intersection)
&& (gst_caps_get_size (intersection) == capssize);
gst_caps_unref (intersection);
res = TRUE;
done:
return res;
}
static void
post_missing_plugin_error (GstElement * urisrc, const gchar * element_name)
{
GstMessage *msg;
msg = gst_missing_element_message_new (urisrc, element_name);
gst_element_post_message (urisrc, msg);
GST_ELEMENT_ERROR (urisrc, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
element_name), (NULL));
}
typedef struct
{
GstURISourceBin *urisrc;
gboolean have_out;
gboolean res;
} AnalyseData;
static void
analyse_pad_foreach (const GValue * item, AnalyseData * data)
{
GstURISourceBin *urisrc = data->urisrc;
GstPad *pad = g_value_dup_object (item);
ChildSrcPadInfo *info;
GstCaps *padcaps = NULL;
gboolean pad_is_raw;
gboolean res = TRUE;
GST_LOG_OBJECT (urisrc, "pad %" GST_PTR_FORMAT, pad);
data->have_out = TRUE;
/* The info might already exist if there was an iterator resync */
if (get_cspi_for_pad (urisrc, pad)) {
GST_LOG_OBJECT (urisrc, "Already analysed");
goto out;
}
info = new_child_src_pad_info (urisrc, pad);
padcaps = gst_pad_query_caps (pad, NULL);
if (!is_all_raw_caps (padcaps, DEFAULT_CAPS, &pad_is_raw) || !pad_is_raw) {
/* if FALSE, this pad has no caps, we setup typefinding on it */
if (!setup_typefind (info)) {
res = FALSE;
goto out;
}
} else if (pad_is_raw) {
/* caps on source pad are all raw, we can add the pad */
GstPad *output_pad;
OutputSlotInfo *slot;
GST_URI_SOURCE_BIN_LOCK (urisrc);
/* Only use buffering (via queue2) on raw pads in very specific
* conditions */
info->use_queue2 = urisrc->use_buffering && IS_QUEUE_URI (urisrc->uri);
GST_DEBUG_OBJECT (urisrc, "use_buffering:%d is_queue:%d",
urisrc->use_buffering, IS_QUEUE_URI (urisrc->uri));
slot = new_output_slot (info, pad);
if (!slot) {
res = FALSE;
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
goto out;
}
/* get the new raw srcpad */
output_pad = gst_object_ref (slot->output_pad);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
expose_output_pad (urisrc, output_pad);
gst_object_unref (output_pad);
} else {
GST_DEBUG_OBJECT (urisrc, "Handling non-raw pad");
/* The caps are non-raw, we handle it directly */
handle_new_pad (info, pad, padcaps);
}
out:
if (padcaps)
gst_caps_unref (padcaps);
gst_object_unref (pad);
data->res &= res;
}
/**
* analyse_source_and_expose_raw_pads:
* @urisrc: a #GstURISourceBin
* @all_pads_raw: are all pads raw data
* @have_out: does the source have output
* @is_dynamic: is this a dynamic source
*
* Check the source of @urisrc and collect information about it.
*
* All pads will be handled directly. Raw pads are exposed as-is. Pads without
* any caps will have a typefind appended to them, and other pads will be
* analysed further.
*
* @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 @urisrc
*
* @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_and_expose_raw_pads (GstURISourceBin * urisrc,
gboolean * have_out, gboolean * is_dynamic)
{
GstElementClass *elemclass;
AnalyseData data = { 0, };
GstIteratorResult iterres;
GList *walk;
GstIterator *pads_iter;
gboolean res = TRUE;
pads_iter = gst_element_iterate_src_pads (urisrc->source);
restart:
data.res = TRUE;
data.have_out = FALSE;
data.urisrc = urisrc;
iterres =
gst_iterator_foreach (pads_iter,
(GstIteratorForeachFunction) analyse_pad_foreach, &data);
if (iterres == GST_ITERATOR_RESYNC)
goto restart;
if (iterres == GST_ITERATOR_ERROR)
res = FALSE;
else
res = data.res;
gst_iterator_free (pads_iter);
/* check for padtemplates that list SOMETIMES pads to
* determine if the element is dynamic. */
*is_dynamic = FALSE;
elemclass = GST_ELEMENT_GET_CLASS (urisrc->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);
}
*have_out = data.have_out;
return res;
}
/* make a demuxer and connect to all the signals */
static GstElement *
make_demuxer (GstURISourceBin * urisrc, ChildSrcPadInfo * info, GstCaps * caps)
{
GList *factories, *eligible, *cur;
GstElement *demuxer = NULL;
GParamSpec *pspec;
GST_LOG_OBJECT (urisrc, "making new adaptive demuxer");
/* now create the demuxer element */
/* FIXME: Fire a signal to get the demuxer? */
factories = gst_element_factory_list_get_elements
(GST_ELEMENT_FACTORY_TYPE_DEMUXER, GST_RANK_MARGINAL);
eligible =
gst_element_factory_list_filter (factories, caps, GST_PAD_SINK,
gst_caps_is_fixed (caps));
gst_plugin_feature_list_free (factories);
if (eligible == NULL)
goto no_demuxer;
eligible = g_list_sort (eligible, gst_plugin_feature_rank_compare_func);
for (cur = eligible; cur != NULL; cur = g_list_next (cur)) {
GstElementFactory *factory = (GstElementFactory *) (cur->data);
const gchar *klass =
gst_element_factory_get_metadata (factory, GST_ELEMENT_METADATA_KLASS);
/* Can't be a demuxer unless it has Demux in the klass name */
if (!strstr (klass, "Demux") || !strstr (klass, "Adaptive"))
continue;
demuxer = gst_element_factory_create (factory, NULL);
break;
}
gst_plugin_feature_list_free (eligible);
if (!demuxer)
goto no_demuxer;
GST_DEBUG_OBJECT (urisrc, "Created adaptive demuxer %" GST_PTR_FORMAT,
demuxer);
/* set up callbacks to create the links between
* demuxer streams and output */
g_signal_connect (demuxer,
"pad-added", G_CALLBACK (new_demuxer_pad_added_cb), info);
g_signal_connect (demuxer,
"pad-removed", G_CALLBACK (demuxer_pad_removed_cb), info);
/* Propagate connection-speed property */
pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (demuxer),
"connection-speed");
if (pspec != NULL)
g_object_set (demuxer,
"connection-speed", urisrc->connection_speed / 1000, NULL);
return demuxer;
/* ERRORS */
no_demuxer:
{
/* FIXME: Fire the right error */
GST_ELEMENT_ERROR (urisrc, CORE, MISSING_PLUGIN, (NULL),
("No demuxer element, check your installation"));
return NULL;
}
}
static gboolean
setup_parsebin_for_slot (ChildSrcPadInfo * info, GstPad * originating_pad)
{
GstURISourceBin *urisrc = info->urisrc;
GstPad *sinkpad;
GstPadLinkReturn link_res;
GST_DEBUG_OBJECT (urisrc, "Setting up parsebin for %" GST_PTR_FORMAT,
originating_pad);
GST_STATE_LOCK (urisrc);
GST_URI_SOURCE_BIN_LOCK (urisrc);
/* Set up optional pre-parsebin download/ringbuffer elements */
if (info->use_downloadbuffer || urisrc->ring_buffer_max_size) {
if (info->use_downloadbuffer) {
GST_DEBUG_OBJECT (urisrc, "Setting up pre-parsebin downloadbuffer");
info->pre_parse_queue = gst_element_factory_make ("downloadbuffer", NULL);
setup_downloadbuffer (urisrc, info->pre_parse_queue);
g_object_set (info->pre_parse_queue, "max-size-bytes",
GET_BUFFER_SIZE (urisrc), "max-size-time",
(guint64) GET_BUFFER_DURATION (urisrc), NULL);
} else if (urisrc->ring_buffer_max_size) {
/* If a ring-buffer-max-size is specified with parsebin, we set it up on
* the queue2 *before* parsebin. We will use its buffering levels instead
* of the ones from multiqueue */
GST_DEBUG_OBJECT (urisrc,
"Setting up pre-parsebin queue2 for ring-buffer-max-size %"
G_GUINT64_FORMAT, urisrc->ring_buffer_max_size);
info->pre_parse_queue = gst_element_factory_make ("queue2", NULL);
/* We do not use this queue2 for buffering levels, but the multiqueue */
g_object_set (info->pre_parse_queue, "use-buffering", FALSE,
"ring-buffer-max-size", urisrc->ring_buffer_max_size,
"max-size-buffers", 0, NULL);
}
gst_element_set_locked_state (info->pre_parse_queue, TRUE);
gst_bin_add (GST_BIN_CAST (urisrc), info->pre_parse_queue);
sinkpad = gst_element_get_static_pad (info->pre_parse_queue, "sink");
link_res = gst_pad_link (originating_pad, sinkpad);
gst_object_unref (sinkpad);
if (link_res != GST_PAD_LINK_OK)
goto could_not_link;
}
info->demuxer = gst_element_factory_make ("parsebin", NULL);
if (!info->demuxer) {
post_missing_plugin_error (GST_ELEMENT_CAST (urisrc), "parsebin");
return FALSE;
}
gst_element_set_locked_state (info->demuxer, TRUE);
gst_bin_add (GST_BIN_CAST (urisrc), info->demuxer);
info->demuxer_is_parsebin = TRUE;
if (info->pre_parse_queue) {
if (!gst_element_link_pads (info->pre_parse_queue, "src", info->demuxer,
"sink"))
goto could_not_link;
} else {
sinkpad = gst_element_get_static_pad (info->demuxer, "sink");
link_res = gst_pad_link (originating_pad, sinkpad);
gst_object_unref (sinkpad);
if (link_res != GST_PAD_LINK_OK)
goto could_not_link;
}
/* set up callbacks to create the links between parsebin and output */
g_signal_connect (info->demuxer,
"pad-added", G_CALLBACK (new_demuxer_pad_added_cb), info);
g_signal_connect (info->demuxer,
"pad-removed", G_CALLBACK (demuxer_pad_removed_cb), info);
if (info->pre_parse_queue) {
gst_element_set_locked_state (info->pre_parse_queue, FALSE);
gst_element_sync_state_with_parent (info->pre_parse_queue);
}
gst_element_set_locked_state (info->demuxer, FALSE);
gst_element_sync_state_with_parent (info->demuxer);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
GST_STATE_UNLOCK (urisrc);
return TRUE;
could_not_link:
{
if (info->pre_parse_queue)
gst_element_set_locked_state (info->pre_parse_queue, FALSE);
if (info->demuxer)
gst_element_set_locked_state (info->demuxer, FALSE);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
GST_STATE_UNLOCK (urisrc);
GST_ELEMENT_ERROR (urisrc, CORE, NEGOTIATION,
(NULL), ("Can't link to (pre-)parsebin element"));
return FALSE;
}
}
/* Called when:
* * Source element adds a new pad
* * typefind has found a type
*/
static void
handle_new_pad (ChildSrcPadInfo * info, GstPad * srcpad, GstCaps * caps)
{
GstURISourceBin *urisrc = info->urisrc;
gboolean is_raw;
GstStructure *s;
const gchar *media_type;
GST_URI_SOURCE_BIN_LOCK (urisrc);
/* if this is a pad with all raw caps, we can expose it */
if (is_all_raw_caps (caps, DEFAULT_CAPS, &is_raw) && is_raw) {
OutputSlotInfo *slot;
GstPad *output_pad;
GST_DEBUG_OBJECT (urisrc, "Found pad with raw caps %" GST_PTR_FORMAT
", exposing", caps);
slot = new_output_slot (info, srcpad);
output_pad = gst_object_ref (slot->output_pad);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
expose_output_pad (urisrc, slot->output_pad);
gst_object_unref (output_pad);
return;
}
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
s = gst_caps_get_structure (caps, 0);
media_type = gst_structure_get_name (s);
urisrc->is_adaptive = IS_ADAPTIVE_MEDIA (media_type);
if (urisrc->is_adaptive) {
GstPad *sinkpad;
GstPadLinkReturn link_res;
GstQuery *query;
info->demuxer = make_demuxer (urisrc, info, caps);
if (!info->demuxer)
goto no_demuxer;
gst_bin_add (GST_BIN_CAST (urisrc), info->demuxer);
/* Query the demuxer to see if it can handle buffering */
query = gst_query_new_buffering (GST_FORMAT_TIME);
info->use_queue2 = urisrc->use_buffering
&& !gst_element_query (info->demuxer, query);
gst_query_unref (query);
GST_DEBUG_OBJECT (urisrc, "Demuxer handles buffering : %d",
info->demuxer_handles_buffering);
sinkpad = gst_element_get_static_pad (info->demuxer, "sink");
if (sinkpad == NULL)
goto no_demuxer_sink;
link_res = gst_pad_link (srcpad, sinkpad);
gst_object_unref (sinkpad);
if (link_res != GST_PAD_LINK_OK)
goto could_not_link;
gst_element_sync_state_with_parent (info->demuxer);
} else if (!urisrc->is_stream) {
if (urisrc->parse_streams) {
/* GST_URI_SOURCE_BIN_LOCK (urisrc); */
setup_parsebin_for_slot (info, srcpad);
/* GST_URI_SOURCE_BIN_UNLOCK (urisrc); */
} else {
/* We don't need buffering here, expose immediately */
OutputSlotInfo *slot;
GstPad *output_pad;
GST_URI_SOURCE_BIN_LOCK (urisrc);
slot = new_output_slot (info, srcpad);
output_pad = gst_object_ref (slot->output_pad);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
expose_output_pad (urisrc, output_pad);
gst_object_unref (output_pad);
}
} else {
/* only enable download buffering if the upstream duration is known */
if (urisrc->download) {
GstQuery *query = gst_query_new_duration (GST_FORMAT_BYTES);
if (gst_pad_query (srcpad, query)) {
gint64 dur;
gst_query_parse_duration (query, NULL, &dur);
info->use_downloadbuffer = (dur != -1);
}
gst_query_unref (query);
}
info->use_queue2 = urisrc->use_buffering;
if (urisrc->parse_streams) {
/* GST_URI_SOURCE_BIN_LOCK (urisrc); */
setup_parsebin_for_slot (info, srcpad);
/* GST_URI_SOURCE_BIN_UNLOCK (urisrc); */
} else {
OutputSlotInfo *slot;
GstPad *output_pad;
GST_URI_SOURCE_BIN_LOCK (urisrc);
slot = new_output_slot (info, srcpad);
gst_pad_add_probe (srcpad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
pre_queue_event_probe, urisrc, NULL);
output_pad = gst_object_ref (slot->output_pad);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
expose_output_pad (urisrc, output_pad);
gst_object_unref (output_pad);
}
}
return;
/* ERRORS */
no_demuxer:
{
/* error was posted */
return;
}
no_demuxer_sink:
{
GST_ELEMENT_ERROR (urisrc, CORE, NEGOTIATION,
(NULL), ("Adaptive demuxer element has no 'sink' pad"));
return;
}
could_not_link:
{
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
GST_ELEMENT_ERROR (urisrc, CORE, NEGOTIATION,
(NULL), ("Can't link typefind to adaptive demuxer element"));
return;
}
}
/* 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, ChildSrcPadInfo * info)
{
GstURISourceBin *urisrc = info->urisrc;
GstPad *srcpad = gst_element_get_static_pad (typefind, "src");
GST_DEBUG_OBJECT (urisrc, "typefind found caps %" GST_PTR_FORMAT
" on pad %" GST_PTR_FORMAT, caps, srcpad);
handle_new_pad (info, srcpad, caps);
gst_object_unref (GST_OBJECT (srcpad));
}
/* setup typefind for any source. This will first plug a typefind element to the
* source. After we find the type, we decide to whether to plug an adaptive
* demuxer, or just link through queue2 (if needed) and expose the data */
static gboolean
setup_typefind (ChildSrcPadInfo * info)
{
GstURISourceBin *urisrc = info->urisrc;
GstPad *sinkpad;
/* now create the typefind element */
info->typefind = gst_element_factory_make ("typefind", NULL);
if (!info->typefind)
goto no_typefind;
/* Make sure the bin doesn't set the typefind running yet */
gst_element_set_locked_state (info->typefind, TRUE);
gst_bin_add (GST_BIN_CAST (urisrc), info->typefind);
sinkpad = gst_element_get_static_pad (info->typefind, "sink");
if (gst_pad_link (info->src_pad, sinkpad) != GST_PAD_LINK_OK)
goto could_not_link;
gst_object_unref (sinkpad);
/* connect a signal to find out when the typefind element found
* a type */
g_signal_connect (info->typefind, "have-type", G_CALLBACK (type_found), info);
/* Now it can start */
gst_element_set_locked_state (info->typefind, FALSE);
gst_element_sync_state_with_parent (info->typefind);
return TRUE;
/* ERRORS */
no_typefind:
{
post_missing_plugin_error (GST_ELEMENT_CAST (urisrc), "typefind");
GST_ELEMENT_ERROR (urisrc, CORE, MISSING_PLUGIN, (NULL),
("No typefind element, check your installation"));
return FALSE;
}
could_not_link:
{
gst_object_unref (sinkpad);
gst_element_set_locked_state (info->typefind, FALSE);
GST_ELEMENT_ERROR (urisrc, CORE, NEGOTIATION,
(NULL), ("Can't link source to typefind element"));
return FALSE;
}
}
/* CALL WITH URISOURCEBIN LOCK */
static void
free_output_slot (OutputSlotInfo * slot, GstURISourceBin * urisrc)
{
GST_DEBUG_OBJECT (urisrc,
"removing output slot %" GST_PTR_FORMAT " -> %" GST_PTR_FORMAT,
slot->originating_pad, slot->output_pad);
if (slot->queue) {
if (slot->bitrate_changed_id > 0)
g_signal_handler_disconnect (slot->queue, slot->bitrate_changed_id);
slot->bitrate_changed_id = 0;
gst_element_set_locked_state (slot->queue, TRUE);
gst_element_set_state (slot->queue, GST_STATE_NULL);
remove_buffering_msgs (urisrc, GST_OBJECT_CAST (slot->queue));
gst_bin_remove (GST_BIN_CAST (urisrc), slot->queue);
}
if (slot->queue_sinkpad) {
if (slot->linked_info && slot->linked_info->multiqueue)
gst_element_release_request_pad (slot->linked_info->multiqueue,
slot->queue_sinkpad);
gst_object_replace ((GstObject **) & slot->queue_sinkpad, NULL);
}
if (slot->demuxer_event_probe_id)
gst_pad_remove_probe (slot->originating_pad, slot->demuxer_event_probe_id);
gst_object_unref (slot->originating_pad);
/* deactivate and remove the srcpad */
gst_pad_set_active (slot->output_pad, FALSE);
gst_element_remove_pad (GST_ELEMENT_CAST (urisrc), slot->output_pad);
g_free (slot);
}
static void
call_free_output_slot (GstURISourceBin * urisrc, OutputSlotInfo * slot)
{
GST_LOG_OBJECT (urisrc, "free output slot in thread pool");
free_output_slot (slot, urisrc);
}
/* must be called with GST_URI_SOURCE_BIN_LOCK */
static void
free_output_slot_async (GstURISourceBin * urisrc, OutputSlotInfo * slot)
{
GST_LOG_OBJECT (urisrc, "pushing output slot on thread pool to free");
slot->linked_info->outputs = g_list_remove (slot->linked_info->outputs, slot);
gst_element_call_async (GST_ELEMENT_CAST (urisrc),
(GstElementCallAsyncFunc) call_free_output_slot, slot, NULL);
}
/* remove source and all related elements */
static void
remove_source (GstURISourceBin * urisrc)
{
if (urisrc->source) {
GstElement *source = urisrc->source;
GST_DEBUG_OBJECT (urisrc, "removing old src element");
gst_element_set_state (source, GST_STATE_NULL);
if (urisrc->src_np_sig_id) {
g_signal_handler_disconnect (source, urisrc->src_np_sig_id);
urisrc->src_np_sig_id = 0;
}
gst_bin_remove (GST_BIN_CAST (urisrc), source);
urisrc->source = NULL;
}
GST_URI_SOURCE_BIN_LOCK (urisrc);
if (urisrc->src_infos) {
g_list_foreach (urisrc->src_infos, (GFunc) free_child_src_pad_info, urisrc);
g_list_free (urisrc->src_infos);
urisrc->src_infos = NULL;
}
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
}
/* is called when a dynamic source element created a new pad. */
static void
source_new_pad (GstElement * element, GstPad * pad, GstURISourceBin * urisrc)
{
GstCaps *caps;
ChildSrcPadInfo *info = new_child_src_pad_info (urisrc, pad);
GST_DEBUG_OBJECT (urisrc, "Found new pad %s.%s in source element %s",
GST_DEBUG_PAD_NAME (pad), GST_ELEMENT_NAME (element));
caps = gst_pad_get_current_caps (pad);
GST_DEBUG_OBJECT (urisrc, "caps %" GST_PTR_FORMAT, caps);
if (caps == NULL)
setup_typefind (info);
else {
handle_new_pad (info, pad, caps);
gst_caps_unref (caps);
}
}
/* construct and run the source and demuxer elements until we found
* all the streams or until a preroll queue has been filled.
*/
static gboolean
setup_source (GstURISourceBin * urisrc)
{
gboolean have_out, is_dynamic;
GST_DEBUG_OBJECT (urisrc, "setup source");
/* create and configure an element that can handle the uri */
if (!(urisrc->source = gen_source_element (urisrc)))
goto no_source;
/* 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 (urisrc), urisrc->source);
/* notify of the new source used */
g_object_notify (G_OBJECT (urisrc), "source");
g_signal_emit (urisrc, gst_uri_source_bin_signals[SIGNAL_SOURCE_SETUP],
0, urisrc->source);
/* 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_and_expose_raw_pads (urisrc, &have_out, &is_dynamic))
goto invalid_source;
if (!is_dynamic) {
if (!have_out)
goto no_pads;
} else {
GST_DEBUG_OBJECT (urisrc, "Source has dynamic output pads");
/* connect a handler for the new-pad signal */
urisrc->src_np_sig_id =
g_signal_connect (urisrc->source, "pad-added",
G_CALLBACK (source_new_pad), urisrc);
}
return TRUE;
/* ERRORS */
no_source:
{
/* error message was already posted */
return FALSE;
}
invalid_source:
{
GST_ELEMENT_ERROR (urisrc, CORE, FAILED,
(_("Source element is invalid.")), (NULL));
return FALSE;
}
no_pads:
{
GST_ELEMENT_ERROR (urisrc, CORE, FAILED,
(_("Source element has no pads.")), (NULL));
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 (GstURISourceBin * urisrc, 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 (urisrc, "redirect message: %" GST_PTR_FORMAT, msg);
GST_DEBUG_OBJECT (urisrc, "connection speed: %" G_GUINT64_FORMAT,
urisrc->connection_speed);
structure = gst_message_get_structure (msg);
if (urisrc->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 (urisrc, "no bitrate: %" GST_PTR_FORMAT, s);
l_neutral = g_list_append (l_neutral, (gpointer) s);
} else if (bitrate > urisrc->connection_speed) {
GST_DEBUG_OBJECT (urisrc, "bitrate too high: %" GST_PTR_FORMAT, s);
l_bad = g_list_append (l_bad, (gpointer) s);
} else if (bitrate <= urisrc->connection_speed) {
GST_DEBUG_OBJECT (urisrc, "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 (urisrc, "new redirect message: %" GST_PTR_FORMAT, new_msg);
return new_msg;
}
/* CALL WITH URISOURCEBIN LOCK */
static OutputSlotInfo *
output_slot_for_buffering_element (GstURISourceBin * urisrc,
GstElement * element)
{
GList *top, *iter;
for (top = urisrc->src_infos; top; top = top->next) {
ChildSrcPadInfo *info = top->data;
for (iter = info->outputs; iter; iter = iter->next) {
OutputSlotInfo *slot = iter->data;
if (slot->queue == element)
return slot;
}
}
return NULL;
}
static void
handle_buffering_message (GstURISourceBin * urisrc, GstMessage * msg)
{
gint perc, msg_perc;
gint smaller_perc = 100;
GstMessage *smaller = NULL;
GList *found = NULL;
GList *iter;
OutputSlotInfo *slot;
/* buffering messages must be aggregated as there might be multiple buffering
* elements in the pipeline and their independent buffering messages will
* confuse the application
*
* urisourcebin keeps a list of messages received from elements that are
* buffering.
* Rules are:
* 0) Ignore buffering from elements that are draining (is_eos == TRUE)
* 1) Always post the smaller buffering %
* 2) If an element posts a 100% buffering message, remove it from the list
* 3) When there are no more messages on the list, post 100% message
* 4) When an element posts a new buffering message, update the one
* on the list to this new value
*/
gst_message_parse_buffering (msg, &msg_perc);
GST_LOG_OBJECT (urisrc, "Got buffering msg from %" GST_PTR_FORMAT
" with %d%%", GST_MESSAGE_SRC (msg), msg_perc);
BUFFERING_LOCK (urisrc);
slot =
output_slot_for_buffering_element (urisrc,
(GstElement *) GST_MESSAGE_SRC (msg));
if (slot && slot->is_eos) {
/* Ignore buffering messages from queues we marked as EOS,
* we already removed those from the list of buffering
* objects */
BUFFERING_UNLOCK (urisrc);
gst_message_replace (&msg, NULL);
return;
}
g_mutex_lock (&urisrc->buffering_post_lock);
/*
* Single loop for 2 things:
* 1) Look for a message with the same source
* 1.1) If the received message is 100%, remove it from the list
* 2) Find the minimum buffering from the list from elements that aren't EOS
*/
for (iter = urisrc->buffering_status; iter;) {
GstMessage *bufstats = iter->data;
gboolean is_eos = FALSE;
slot =
output_slot_for_buffering_element (urisrc,
(GstElement *) GST_MESSAGE_SRC (msg));
if (slot)
is_eos = slot->is_eos;
if (GST_MESSAGE_SRC (bufstats) == GST_MESSAGE_SRC (msg)) {
found = iter;
if (msg_perc < 100) {
gst_message_unref (iter->data);
bufstats = iter->data = gst_message_ref (msg);
} else {
GList *current = iter;
/* remove the element here and avoid confusing the loop */
iter = g_list_next (iter);
gst_message_unref (current->data);
urisrc->buffering_status =
g_list_delete_link (urisrc->buffering_status, current);
continue;
}
}
/* only update minimum stat for non-EOS slots */
if (!is_eos) {
gst_message_parse_buffering (bufstats, &perc);
if (perc < smaller_perc) {
smaller_perc = perc;
smaller = bufstats;
}
} else {
GST_LOG_OBJECT (urisrc, "Ignoring buffering from EOS element");
}
iter = g_list_next (iter);
}
if (found == NULL && msg_perc < 100) {
if (msg_perc < smaller_perc) {
smaller_perc = msg_perc;
smaller = msg;
}
urisrc->buffering_status =
g_list_prepend (urisrc->buffering_status, gst_message_ref (msg));
}
if (smaller_perc == urisrc->last_buffering_pct) {
/* Don't repeat our last buffering status */
gst_message_replace (&msg, NULL);
} else {
urisrc->last_buffering_pct = smaller_perc;
/* now compute the buffering message that should be posted */
if (smaller_perc == 100) {
g_assert (urisrc->buffering_status == NULL);
/* we are posting the original received msg */
} else {
gst_message_replace (&msg, smaller);
}
}
BUFFERING_UNLOCK (urisrc);
if (msg) {
GST_LOG_OBJECT (urisrc, "Sending buffering msg from %" GST_PTR_FORMAT
" with %d%%", GST_MESSAGE_SRC (msg), smaller_perc);
GST_BIN_CLASS (parent_class)->handle_message (GST_BIN (urisrc), msg);
} else {
GST_LOG_OBJECT (urisrc, "Dropped buffering msg as a repeat of %d%%",
smaller_perc);
}
g_mutex_unlock (&urisrc->buffering_post_lock);
}
/* Remove any buffering message from the given source */
static void
remove_buffering_msgs (GstURISourceBin * urisrc, GstObject * src)
{
GList *iter;
gboolean removed = FALSE, post;
BUFFERING_LOCK (urisrc);
g_mutex_lock (&urisrc->buffering_post_lock);
GST_DEBUG_OBJECT (urisrc, "Removing %" GST_PTR_FORMAT
" buffering messages", src);
for (iter = urisrc->buffering_status; iter;) {
GstMessage *bufstats = iter->data;
if (GST_MESSAGE_SRC (bufstats) == src) {
gst_message_unref (bufstats);
urisrc->buffering_status =
g_list_delete_link (urisrc->buffering_status, iter);
removed = TRUE;
break;
}
iter = g_list_next (iter);
}
post = (removed && urisrc->buffering_status == NULL);
BUFFERING_UNLOCK (urisrc);
if (post) {
GST_DEBUG_OBJECT (urisrc, "Last buffering element done - posting 100%%");
/* removed the last buffering element, post 100% */
gst_element_post_message (GST_ELEMENT_CAST (urisrc),
gst_message_new_buffering (GST_OBJECT_CAST (urisrc), 100));
}
g_mutex_unlock (&urisrc->buffering_post_lock);
}
static ChildSrcPadInfo *
find_adaptive_demuxer_cspi_for_msg (GstURISourceBin * urisrc,
GstElement * child)
{
ChildSrcPadInfo *res = NULL;
GList *tmp;
GstElement *parent = gst_object_ref (child);
do {
GstElement *next_parent;
for (tmp = urisrc->src_infos; tmp; tmp = tmp->next) {
ChildSrcPadInfo *info = tmp->data;
if (parent == info->demuxer) {
res = info;
break;
}
}
next_parent = (GstElement *) gst_element_get_parent (parent);
gst_object_unref (parent);
parent = next_parent;
} while (parent && parent != (GstElement *) urisrc);
if (parent)
gst_object_unref (parent);
return res;
}
static void
handle_message (GstBin * bin, GstMessage * msg)
{
GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (bin);
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_ELEMENT:{
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 (urisrc, msg);
}
break;
}
case GST_MESSAGE_STREAM_COLLECTION:
{
ChildSrcPadInfo *info;
/* We only want to forward stream collection from the source element *OR*
* from adaptive demuxers. We do not want to forward them from the
* potential parsebins since there might be many and require aggregation
* to be useful/coherent. */
GST_URI_SOURCE_BIN_LOCK (urisrc);
info =
find_adaptive_demuxer_cspi_for_msg (urisrc,
(GstElement *) GST_MESSAGE_SRC (msg));
if (info) {
info->demuxer_streams_aware = TRUE;
if (info->demuxer_is_parsebin) {
GST_DEBUG_OBJECT (bin, "Dropping stream-collection from parsebin");
gst_message_unref (msg);
msg = NULL;
}
} else if (GST_MESSAGE_SRC (msg) != (GstObject *) urisrc->source) {
GST_LOG_OBJECT (bin, "Collection %" GST_PTR_FORMAT, msg);
GST_DEBUG_OBJECT (bin,
"Dropping stream-collection from %"
GST_PTR_FORMAT, GST_MESSAGE_SRC (msg));
gst_message_unref (msg);
msg = NULL;
}
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
}
break;
case GST_MESSAGE_BUFFERING:
handle_buffering_message (urisrc, msg);
msg = NULL;
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) (GstURISourceBin * urisrc, QueryFold * fold);
typedef void (*QueryDoneFunction) (GstURISourceBin * urisrc, QueryFold * fold);
/* for duration/position we collect all durations/positions and take
* the MAX of all valid results */
static void
uri_source_query_init (GstURISourceBin * urisrc, QueryFold * fold)
{
fold->min = 0;
fold->max = -1;
fold->seekable = TRUE;
fold->live = 0;
}
static gboolean
uri_source_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 (item, "got duration %" G_GINT64_FORMAT, duration);
if (duration > fold->max)
fold->max = duration;
}
return TRUE;
}
static void
uri_source_query_duration_done (GstURISourceBin * urisrc, 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
uri_source_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 (item, "got position %" G_GINT64_FORMAT, position);
if (position > fold->max)
fold->max = position;
}
return TRUE;
}
static void
uri_source_query_position_done (GstURISourceBin * urisrc, 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 (urisrc, "max position %" G_GINT64_FORMAT, fold->max);
}
static gboolean
uri_source_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
uri_source_query_latency_done (GstURISourceBin * urisrc, QueryFold * fold)
{
/* store max in query result */
gst_query_set_latency (fold->query, fold->live, fold->min, fold->max);
GST_DEBUG_OBJECT (urisrc,
"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
uri_source_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 (item, "got seekable %d", seekable);
if (fold->seekable)
fold->seekable = seekable;
}
return TRUE;
}
static void
uri_source_query_seeking_done (GstURISourceBin * urisrc, 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 (urisrc, "seekable %d", fold->seekable);
}
/* generic fold, return first valid result */
static gboolean
uri_source_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 (item, "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_source_bin_query (GstElement * element, GstQuery * query)
{
GstURISourceBin *urisrc;
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;
urisrc = GST_URI_SOURCE_BIN (element);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
/* iterate and collect durations */
fold_func = (GstIteratorFoldFunction) uri_source_query_duration_fold;
fold_init = uri_source_query_init;
fold_done = uri_source_query_duration_done;
break;
case GST_QUERY_POSITION:
/* iterate and collect durations */
fold_func = (GstIteratorFoldFunction) uri_source_query_position_fold;
fold_init = uri_source_query_init;
fold_done = uri_source_query_position_done;
break;
case GST_QUERY_LATENCY:
/* iterate and collect durations */
fold_func = (GstIteratorFoldFunction) uri_source_query_latency_fold;
fold_init = uri_source_query_init;
fold_done = uri_source_query_latency_done;
default_ret = TRUE;
break;
case GST_QUERY_SEEKING:
/* iterate and collect durations */
fold_func = (GstIteratorFoldFunction) uri_source_query_seeking_fold;
fold_init = uri_source_query_init;
fold_done = uri_source_query_seeking_done;
break;
default:
fold_func = (GstIteratorFoldFunction) uri_source_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 (urisrc, &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 (urisrc, &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 (urisrc, &fold_data);
goto done;
default:
res = FALSE;
goto done;
}
}
done:
gst_iterator_free (iter);
return res;
}
static GstStateChangeReturn
gst_uri_source_bin_change_state (GstElement * element,
GstStateChange transition)
{
GstStateChangeReturn ret;
GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
GST_URI_SOURCE_BIN_LOCK (element);
urisrc->flushing = FALSE;
urisrc->activated = FALSE;
GST_URI_SOURCE_BIN_UNLOCK (element);
GST_DEBUG ("ready to paused");
if (!setup_source (urisrc))
goto source_failed;
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_URI_SOURCE_BIN_LOCK (element);
urisrc->flushing = TRUE;
g_cond_broadcast (&urisrc->activation_cond);
GST_URI_SOURCE_BIN_UNLOCK (element);
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_URI_SOURCE_BIN_LOCK (element);
GST_DEBUG_OBJECT (urisrc, "Potentially exposing pads");
urisrc->activated = TRUE;
g_cond_broadcast (&urisrc->activation_cond);
GST_URI_SOURCE_BIN_UNLOCK (element);
}
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_DEBUG ("paused to ready");
remove_source (urisrc);
g_list_free_full (urisrc->buffering_status,
(GDestroyNotify) gst_message_unref);
urisrc->buffering_status = NULL;
urisrc->last_buffering_pct = -1;
break;
default:
break;
}
return ret;
/* ERRORS */
source_failed:
{
remove_source (urisrc);
return GST_STATE_CHANGE_FAILURE;
}
setup_failed:
{
if (transition == GST_STATE_CHANGE_READY_TO_PAUSED)
remove_source (urisrc);
return GST_STATE_CHANGE_FAILURE;
}
}
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