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gstreamer/gst/playback/gsturisourcebin.c
Edward Hervey ebf138e29e urisourcebin: Add 'about-to-finish' signal 
With push-based sources, urisourcebin will emit this signal when
the stream has been fully consumed.

This signal can be used to know when the source is done providing
data.
2018-02-10 12:24:09 +01:00

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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.
*
* <emphasis>urisourcebin is still experimental API and a technology preview.
* Its behaviour and exposed API is subject to change.</emphasis>
*/
/* 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 <gst/gst-i18n-plugin.h>
#include <gst/pbutils/missing-plugins.h>
#include "gstplay-enum.h"
#include "gstrawcaps.h"
#include "gstplayback.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(dec) (g_mutex_lock(&((GstURISourceBin*)(dec))->lock))
#define GST_URI_SOURCE_BIN_UNLOCK(dec) (g_mutex_unlock(&((GstURISourceBin*)(dec))->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 a child that
* is linked or needs linking to an output
* slot */
struct _ChildSrcPadInfo
{
guint blocking_probe_id;
guint event_probe_id;
GstPad *demux_src_pad;
GstCaps *cur_caps; /* holds ref */
/* Configured output slot, if any */
OutputSlotInfo *output_slot;
};
struct _OutputSlotInfo
{
ChildSrcPadInfo *linked_info; /* demux source pad info feeding this slot, if any */
GstElement *queue; /* queue2 or downloadbuffer */
GstPad *sinkpad; /* Sink pad of the queue eleemnt */
GstPad *srcpad; /* Output ghost pad */
gboolean is_eos; /* Did EOS get fed into the buffering element */
};
/**
* GstURISourceBin
*
* urisourcebin element struct
*/
struct _GstURISourceBin
{
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;
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;
GstElement *source;
GList *typefinds; /* list of typefind element */
GstElement *demuxer; /* Adaptive demuxer if any */
GSList *out_slots;
GHashTable *streams;
guint numpads;
/* for dynamic sources */
guint src_np_sig_id; /* new-pad signal id */
guint64 ring_buffer_max_size; /* 0 means disabled */
GList *pending_pads; /* Pads we have blocked pending assignment
to an output source pad */
GList *inactive_output_pads; /* output pads that were unghosted */
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_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
};
static void post_missing_plugin_error (GstElement * dec,
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);
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 remove_demuxer (GstURISourceBin * bin);
static void expose_output_pad (GstURISourceBin * urisrc, GstPad * pad);
static OutputSlotInfo *get_output_slot (GstURISourceBin * urisrc,
gboolean do_download, gboolean is_adaptive, GstCaps * caps);
static void free_output_slot (OutputSlotInfo * slot, GstURISourceBin * urisrc);
static void free_output_slot_async (GstURISourceBin * urisrc,
OutputSlotInfo * slot);
static GstPad *create_output_pad (GstURISourceBin * urisrc, GstPad * pad);
static void remove_buffering_msgs (GstURISourceBin * bin, GstObject * src);
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::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,
g_cclosure_marshal_generic, 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,
g_cclosure_marshal_generic, 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,
g_cclosure_marshal_generic, 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)
{
/* first filter out the interesting element factories */
g_mutex_init (&urisrc->factories_lock);
g_mutex_init (&urisrc->lock);
g_mutex_init (&urisrc->buffering_lock);
g_mutex_init (&urisrc->buffering_post_lock);
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;
GST_OBJECT_FLAG_SET (urisrc, GST_ELEMENT_FLAG_SOURCE);
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);
remove_demuxer (urisrc);
g_mutex_clear (&urisrc->lock);
g_mutex_clear (&urisrc->factories_lock);
g_mutex_clear (&urisrc->buffering_lock);
g_mutex_clear (&urisrc->buffering_post_lock);
g_free (urisrc->uri);
if (urisrc->factories)
gst_plugin_feature_list_free (urisrc->factories);
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 *dec = GST_URI_SOURCE_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_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_RING_BUFFER_MAX_SIZE:
dec->ring_buffer_max_size = g_value_get_uint64 (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 *dec = GST_URI_SOURCE_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_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_RING_BUFFER_MAX_SIZE:
g_value_set_uint64 (value, dec->ring_buffer_max_size);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
#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 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
pending_pad_blocked (GstPad * pad, GstPadProbeInfo * info, gpointer user_data);
static GstPadProbeReturn
demux_pad_events (GstPad * pad, GstPadProbeInfo * info, gpointer user_data);
static void
free_child_src_pad_info (ChildSrcPadInfo * info)
{
if (info->cur_caps)
gst_caps_unref (info->cur_caps);
g_free (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,
GstURISourceBin * urisrc)
{
ChildSrcPadInfo *info;
info = g_new0 (ChildSrcPadInfo, 1);
info->demux_src_pad = pad;
info->cur_caps = gst_pad_get_current_caps (pad);
if (info->cur_caps == NULL)
info->cur_caps = gst_pad_query_caps (pad, NULL);
g_object_set_data_full (G_OBJECT (pad), "urisourcebin.srcpadinfo",
info, (GDestroyNotify) free_child_src_pad_info);
GST_DEBUG_OBJECT (element, "new demuxer pad, name: <%s>. "
"Added as pending pad with caps %" GST_PTR_FORMAT,
GST_PAD_NAME (pad), info->cur_caps);
GST_URI_SOURCE_BIN_LOCK (urisrc);
urisrc->pending_pads = g_list_prepend (urisrc->pending_pads, pad);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
/* Block the pad. On the first data on that pad if it hasn't
* been linked to an output slot, we'll create one */
info->blocking_probe_id =
gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM,
pending_pad_blocked, urisrc, NULL);
info->event_probe_id =
gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM |
GST_PAD_PROBE_TYPE_EVENT_FLUSH, demux_pad_events, urisrc, NULL);
}
static GstPadProbeReturn
pending_pad_blocked (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
{
ChildSrcPadInfo *child_info;
OutputSlotInfo *slot;
GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (user_data);
GstCaps *caps;
if (!(child_info =
g_object_get_data (G_OBJECT (pad), "urisourcebin.srcpadinfo")))
goto done;
GST_LOG_OBJECT (urisrc, "Removing pad %" GST_PTR_FORMAT " from pending list",
pad);
GST_URI_SOURCE_BIN_LOCK (urisrc);
/* Once blocked, this pad is no longer pending, one way or another */
urisrc->pending_pads = g_list_remove (urisrc->pending_pads, pad);
/* If already linked to a slot, nothing more to do */
if (child_info->output_slot) {
GST_LOG_OBJECT (urisrc, "Pad %" GST_PTR_FORMAT " is linked to queue %"
GST_PTR_FORMAT " on slot %p", pad, child_info->output_slot->queue,
child_info->output_slot);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
goto done;
}
caps = gst_pad_get_current_caps (pad);
if (caps == NULL)
caps = gst_pad_query_caps (pad, NULL);
slot = get_output_slot (urisrc, FALSE, TRUE, caps);
gst_caps_unref (caps);
if (slot == NULL) {
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
goto done;
}
GST_LOG_OBJECT (urisrc, "Pad %" GST_PTR_FORMAT " linked to slot %p", pad,
slot);
child_info->output_slot = slot;
slot->linked_info = child_info;
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
gst_pad_link (pad, slot->sinkpad);
expose_output_pad (urisrc, slot->srcpad);
done:
return GST_PAD_PROBE_REMOVE;
}
/* Called with LOCK held */
/* Looks for a suitable pending pad to connect onto this
* finishing output slot that's about to EOS */
static gboolean
link_pending_pad_to_output (GstURISourceBin * urisrc, OutputSlotInfo * slot)
{
GList *cur;
ChildSrcPadInfo *in_info = slot->linked_info;
ChildSrcPadInfo *out_info = NULL;
gboolean res = FALSE;
GstCaps *cur_caps;
/* Look for a suitable pending pad */
cur_caps = gst_pad_get_current_caps (slot->sinkpad);
GST_DEBUG_OBJECT (urisrc,
"Looking for a pending pad with caps %" GST_PTR_FORMAT, cur_caps);
for (cur = urisrc->pending_pads; cur != NULL; cur = g_list_next (cur)) {
GstPad *pending = (GstPad *) (cur->data);
ChildSrcPadInfo *cur_info = NULL;
if ((cur_info =
g_object_get_data (G_OBJECT (pending),
"urisourcebin.srcpadinfo"))) {
/* Don't re-link to the same pad in case of EOS while still pending */
if (in_info == cur_info)
continue;
if (cur_caps == NULL || gst_caps_is_equal (cur_caps, cur_info->cur_caps)) {
GST_DEBUG_OBJECT (urisrc, "Found suitable pending pad %" GST_PTR_FORMAT
" with caps %" GST_PTR_FORMAT " to link to this output slot",
cur_info->demux_src_pad, cur_info->cur_caps);
out_info = cur_info;
break;
}
}
}
if (cur_caps)
gst_caps_unref (cur_caps);
if (out_info) {
/* Block any upstream stuff while we switch out the pad */
guint block_id =
gst_pad_add_probe (slot->sinkpad, GST_PAD_PROBE_TYPE_BLOCK_UPSTREAM,
NULL, NULL, NULL);
GST_DEBUG_OBJECT (urisrc, "Linking pending pad %" GST_PTR_FORMAT
" to existing output slot %p", out_info->demux_src_pad, slot);
if (in_info) {
gst_pad_unlink (in_info->demux_src_pad, slot->sinkpad);
in_info->output_slot = NULL;
slot->linked_info = NULL;
}
if (gst_pad_link (out_info->demux_src_pad,
slot->sinkpad) == GST_PAD_LINK_OK) {
out_info->output_slot = slot;
slot->linked_info = out_info;
BUFFERING_LOCK (urisrc);
/* A re-linked slot is no longer EOS */
slot->is_eos = FALSE;
BUFFERING_UNLOCK (urisrc);
res = TRUE;
slot->is_eos = FALSE;
urisrc->pending_pads =
g_list_remove (urisrc->pending_pads, out_info->demux_src_pad);
} else {
GST_ERROR_OBJECT (urisrc,
"Failed to link new demuxer pad to the output slot we tried");
}
gst_pad_remove_probe (slot->sinkpad, block_id);
}
return res;
}
/* Called with lock held */
static gboolean
all_slots_are_eos (GstURISourceBin * urisrc)
{
GSList *tmp;
for (tmp = urisrc->out_slots; tmp; tmp = tmp->next) {
OutputSlotInfo *slot = (OutputSlotInfo *) tmp->data;
if (slot->is_eos == FALSE)
return FALSE;
}
return TRUE;
}
static GstPadProbeReturn
demux_pad_events (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
{
GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (user_data);
ChildSrcPadInfo *child_info;
GstPadProbeReturn ret = GST_PAD_PROBE_OK;
GstEvent *ev = GST_PAD_PROBE_INFO_EVENT (info);
if (!(child_info =
g_object_get_data (G_OBJECT (pad), "urisourcebin.srcpadinfo")))
goto done;
GST_URI_SOURCE_BIN_LOCK (urisrc);
/* If not linked to a slot, nothing more to do */
if (child_info->output_slot == NULL) {
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
goto done;
}
switch (GST_EVENT_TYPE (ev)) {
case GST_EVENT_EOS:
{
GstStructure *s;
gboolean all_streams_eos;
GST_LOG_OBJECT (urisrc, "EOS on pad %" GST_PTR_FORMAT, pad);
if ((urisrc->pending_pads &&
link_pending_pad_to_output (urisrc, child_info->output_slot))) {
/* Found a new source pad to give this slot data - no need to send EOS */
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
ret = GST_PAD_PROBE_DROP;
goto done;
}
BUFFERING_LOCK (urisrc);
/* Mark that we fed an EOS to this slot */
child_info->output_slot->is_eos = TRUE;
all_streams_eos = all_slots_are_eos (urisrc);
BUFFERING_UNLOCK (urisrc);
/* EOS means this element is no longer buffering */
remove_buffering_msgs (urisrc,
GST_OBJECT_CAST (child_info->output_slot->queue));
/* Mark this custom EOS */
ev = gst_event_make_writable (ev);
GST_PAD_PROBE_INFO_DATA (info) = ev;
s = gst_event_writable_structure (ev);
gst_structure_set (s, "urisourcebin-custom-eos", G_TYPE_BOOLEAN, TRUE,
NULL);
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_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (ev, &caps);
gst_caps_replace (&child_info->cur_caps, caps);
}
break;
case GST_EVENT_STREAM_START:
case GST_EVENT_FLUSH_STOP:
BUFFERING_LOCK (urisrc);
child_info->output_slot->is_eos = FALSE;
BUFFERING_UNLOCK (urisrc);
break;
default:
break;
}
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
done:
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;
}
/* Called with lock held */
static OutputSlotInfo *
get_output_slot (GstURISourceBin * urisrc, gboolean do_download,
gboolean is_adaptive, GstCaps * caps)
{
OutputSlotInfo *slot;
GstPad *srcpad;
GstElement *queue;
const gchar *elem_name;
/* If we have caps, iterate the existing slots and look for an
* unlinked one that can be used */
if (caps && gst_caps_is_fixed (caps)) {
GSList *cur;
GstCaps *cur_caps;
for (cur = urisrc->out_slots; cur != NULL; cur = g_slist_next (cur)) {
slot = (OutputSlotInfo *) (cur->data);
if (slot->linked_info == NULL) {
cur_caps = gst_pad_get_current_caps (slot->sinkpad);
if (cur_caps == NULL || gst_caps_is_equal (caps, cur_caps)) {
GST_LOG_OBJECT (urisrc, "Found existing slot %p to link to", slot);
gst_caps_unref (cur_caps);
slot->is_eos = FALSE;
return slot;
}
gst_caps_unref (cur_caps);
}
}
}
/* Otherwise create the new slot */
if (do_download)
elem_name = "downloadbuffer";
else
elem_name = "queue2";
queue = gst_element_factory_make (elem_name, NULL);
if (!queue)
goto no_buffer_element;
slot = g_new0 (OutputSlotInfo, 1);
slot->queue = queue;
/* Set the slot onto the queue (needed in buffering msg handling) */
g_object_set_data (G_OBJECT (queue), "urisourcebin.slotinfo", slot);
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 (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 (queue, "temp-template", temp_template, NULL);
g_free (filename);
g_free (temp_template);
} else {
if (is_adaptive) {
GST_LOG_OBJECT (urisrc, "Adding queue for adaptive streaming stream");
g_object_set (queue, "use-buffering", urisrc->use_buffering,
"use-tags-bitrate", TRUE, "use-rate-estimate", FALSE, NULL);
} else {
GST_LOG_OBJECT (urisrc, "Adding queue for buffering");
g_object_set (queue, "use-buffering", urisrc->use_buffering, NULL);
}
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);
}
/* If buffer size or duration are set, set them on the element */
if (urisrc->buffer_size != -1)
g_object_set (queue, "max-size-bytes", urisrc->buffer_size, NULL);
if (urisrc->buffer_duration != -1)
g_object_set (queue, "max-size-time", urisrc->buffer_duration, NULL);
#if 0
/* Disabled because this makes initial startup slower for radio streams */
else {
/* Buffer 4 seconds by default - some extra headroom over the
* core default, because we trigger playback sooner */
//g_object_set (queue, "max-size-time", 4 * GST_SECOND, NULL);
}
#endif
/* save queue pointer so we can remove it later */
urisrc->out_slots = g_slist_prepend (urisrc->out_slots, slot);
gst_bin_add (GST_BIN_CAST (urisrc), queue);
gst_element_sync_state_with_parent (queue);
slot->sinkpad = gst_element_get_static_pad (queue, "sink");
/* get the new raw srcpad */
srcpad = gst_element_get_static_pad (queue, "src");
g_object_set_data (G_OBJECT (srcpad), "urisourcebin.slotinfo", slot);
slot->srcpad = create_output_pad (urisrc, srcpad);
gst_object_unref (srcpad);
return slot;
no_buffer_element:
{
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);
GstURISourceBin *urisrc = user_data;
GST_LOG_OBJECT (pad, "%s, urisrc %p", GST_EVENT_TYPE_NAME (event), event);
if (GST_EVENT_TYPE (event) == GST_EVENT_EOS && gst_event_get_structure (event)
&& gst_structure_has_field (gst_event_get_structure (event),
"urisourcebin-custom-eos")) {
OutputSlotInfo *slot;
GST_DEBUG_OBJECT (pad, "we received EOS");
GST_URI_SOURCE_BIN_LOCK (urisrc);
slot = g_object_get_data (G_OBJECT (pad), "urisourcebin.slotinfo");
if (slot) {
GstEvent *eos;
guint32 seqnum;
if (slot->linked_info) {
if (slot->is_eos) {
/* linked_info is old input which is stil linked without removal */
GST_DEBUG_OBJECT (pad, "push actual EOS");
seqnum = gst_event_get_seqnum (event);
eos = gst_event_new_eos ();
gst_event_set_seqnum (eos, seqnum);
gst_pad_push_event (slot->srcpad, eos);
} else {
/* Do not clear output slot yet. A new input was
* connected. We should just drop this EOS */
}
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
return GST_PAD_PROBE_DROP;
}
seqnum = gst_event_get_seqnum (event);
eos = gst_event_new_eos ();
gst_event_set_seqnum (eos, seqnum);
gst_pad_push_event (slot->srcpad, eos);
free_output_slot_async (urisrc, slot);
}
/* FIXME: Only emit drained if all output pads are done and there's no
* pending pads */
g_signal_emit (urisrc, gst_uri_source_bin_signals[SIGNAL_DRAINED], 0, NULL);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
return GST_PAD_PROBE_DROP;
}
/* 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 (GstURISourceBin * urisrc, GstPad * pad)
{
GstPad *newpad;
GstPadTemplate *pad_tmpl;
gchar *padname;
gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
source_pad_event_probe, urisrc, 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 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_element_add_pad (GST_ELEMENT_CAST (urisrc), pad);
}
static void
pad_removed_cb (GstElement * element, GstPad * pad, GstURISourceBin * urisrc)
{
ChildSrcPadInfo *info;
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 (!(info = g_object_get_data (G_OBJECT (pad), "urisourcebin.srcpadinfo")))
goto no_info;
GST_URI_SOURCE_BIN_LOCK (urisrc);
/* Make sure this isn't in the pending pads list */
urisrc->pending_pads = g_list_remove (urisrc->pending_pads, pad);
/* Send EOS to the output slot if the demuxer didn't already */
if (info->output_slot) {
GstStructure *s;
GstEvent *event;
OutputSlotInfo *slot;
slot = info->output_slot;
if (!slot->is_eos && urisrc->pending_pads &&
link_pending_pad_to_output (urisrc, slot)) {
/* Found a new source pad to give this slot data - no need to send EOS */
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
return;
}
BUFFERING_LOCK (urisrc);
/* Unlink this pad from its output slot and send a fake EOS event
* to drain the queue */
slot->is_eos = TRUE;
BUFFERING_UNLOCK (urisrc);
remove_buffering_msgs (urisrc, GST_OBJECT_CAST (slot->queue));
slot->linked_info = NULL;
info->output_slot = NULL;
GST_LOG_OBJECT (element,
"Pad %" GST_PTR_FORMAT " was removed without EOS. Sending.", pad);
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->sinkpad, event);
} else {
GST_LOG_OBJECT (urisrc, "Removed pad has no output slot");
}
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
return;
/* ERRORS */
no_info:
{
GST_WARNING_OBJECT (element, "no info found for pad");
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, "source", &err);
if (!source)
goto no_source;
GST_LOG_OBJECT (urisrc, "found source type %s", G_OBJECT_TYPE_NAME (source));
query = gst_query_new_scheduling ();
if (gst_element_query (source, query)) {
gst_query_parse_scheduling (query, &flags, NULL, NULL, NULL);
urisrc->is_stream = flags & GST_SCHEDULING_FLAG_BANDWIDTH_LIMITED;
} else
urisrc->is_stream = IS_STREAM_URI (urisrc->uri);
gst_query_unref (query);
GST_LOG_OBJECT (urisrc, "source is stream: %d", urisrc->is_stream);
urisrc->need_queue = IS_QUEUE_URI (urisrc->uri);
GST_LOG_OBJECT (urisrc, "source needs queue: %d", urisrc->need_queue);
source_class = G_OBJECT_GET_CLASS (source);
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;
}
/**
* has_all_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 has no caps. Else TRUE and @all_raw set t the result.
*/
static gboolean
has_all_raw_caps (GstPad * pad, GstCaps * rawcaps, gboolean * all_raw)
{
GstCaps *caps;
gboolean res = FALSE;
caps = gst_pad_query_caps (pad, NULL);
GST_DEBUG_OBJECT (pad, "have caps %" GST_PTR_FORMAT, caps);
res = is_all_raw_caps (caps, rawcaps, all_raw);
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));
}
/**
* analyse_source:
* @urisrc: a #GstURISourceBin
* @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 @urisrc 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 @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 occured while scanning.
*/
static gboolean
analyse_source (GstURISourceBin * urisrc, gboolean * is_raw,
gboolean * have_out, gboolean * is_dynamic, gboolean use_queue)
{
GstIterator *pads_iter;
gboolean done = FALSE;
gboolean res = TRUE;
GstPad *pad;
GValue item = { 0, };
GstCaps *rawcaps = DEFAULT_CAPS;
*have_out = FALSE;
*is_raw = FALSE;
*is_dynamic = FALSE;
pads_iter = gst_element_iterate_src_pads (urisrc->source);
while (!done) {
switch (gst_iterator_next (pads_iter, &item)) {
case GST_ITERATOR_ERROR:
res = FALSE;
/* FALLTROUGH */
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 ouput pad */
*have_out = TRUE;
/* if FALSE, this pad has no caps and we continue with the next pad. */
if (!has_all_raw_caps (pad, rawcaps, is_raw)) {
gst_object_unref (pad);
g_value_reset (&item);
break;
}
/* caps on source pad are all raw, we can add the pad */
if (*is_raw) {
GST_URI_SOURCE_BIN_LOCK (urisrc);
if (use_queue) {
OutputSlotInfo *slot = get_output_slot (urisrc, FALSE, FALSE, NULL);
if (!slot)
goto no_slot;
gst_pad_link (pad, slot->sinkpad);
/* get the new raw srcpad */
gst_object_unref (pad);
pad = slot->srcpad;
} else {
pad = create_output_pad (urisrc, pad);
}
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
expose_output_pad (urisrc, pad);
gst_object_unref (pad);
}
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 (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);
}
}
return res;
no_slot:
{
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
gst_object_unref (pad);
g_value_unset (&item);
gst_iterator_free (pads_iter);
gst_caps_unref (rawcaps);
return FALSE;
}
}
/* Remove any adaptive demuxer element */
static void
remove_demuxer (GstURISourceBin * bin)
{
if (bin->demuxer) {
GST_DEBUG_OBJECT (bin, "removing old demuxer element");
gst_element_set_state (bin->demuxer, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (bin), bin->demuxer);
bin->demuxer = NULL;
}
}
/* make a demuxer and connect to all the signals */
static GstElement *
make_demuxer (GstURISourceBin * urisrc, 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), urisrc);
g_signal_connect (demuxer,
"pad-removed", G_CALLBACK (pad_removed_cb), urisrc);
/* 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 void
handle_new_pad (GstURISourceBin * urisrc, GstPad * srcpad, GstCaps * caps)
{
gboolean is_raw;
GstStructure *s;
const gchar *media_type;
gboolean do_download = FALSE;
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) {
GstPad *pad;
GST_DEBUG_OBJECT (urisrc, "Found pad with raw caps %" GST_PTR_FORMAT
", exposing", caps);
pad = create_output_pad (urisrc, srcpad);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
expose_output_pad (urisrc, 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;
urisrc->demuxer = make_demuxer (urisrc, caps);
if (!urisrc->demuxer)
goto no_demuxer;
gst_bin_add (GST_BIN_CAST (urisrc), urisrc->demuxer);
sinkpad = gst_element_get_static_pad (urisrc->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 (urisrc->demuxer);
} else if (!urisrc->is_stream) {
GstPad *pad;
/* We don't need slot here, expose immediately */
GST_URI_SOURCE_BIN_LOCK (urisrc);
pad = create_output_pad (urisrc, srcpad);
expose_output_pad (urisrc, pad);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
} else {
OutputSlotInfo *slot;
/* 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);
do_download = (dur != -1);
}
gst_query_unref (query);
}
GST_DEBUG_OBJECT (urisrc, "check media-type %s, do_download:%d", media_type,
do_download);
GST_URI_SOURCE_BIN_LOCK (urisrc);
slot = get_output_slot (urisrc, do_download, FALSE, NULL);
if (slot == NULL || gst_pad_link (srcpad, slot->sinkpad) != GST_PAD_LINK_OK)
goto could_not_link;
gst_pad_add_probe (srcpad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
pre_queue_event_probe, urisrc, NULL);
expose_output_pad (urisrc, slot->srcpad);
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
}
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, GstURISourceBin * 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 (urisrc, 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 (GstURISourceBin * urisrc, GstPad * srcpad)
{
GstElement *typefind;
/* now create the typefind element */
typefind = gst_element_factory_make ("typefind", NULL);
if (!typefind)
goto no_typefind;
/* Make sure the bin doesn't set the typefind running yet */
gst_element_set_locked_state (typefind, TRUE);
gst_bin_add (GST_BIN_CAST (urisrc), typefind);
if (!srcpad) {
if (!gst_element_link_pads (urisrc->source, NULL, typefind, "sink"))
goto could_not_link;
} else {
GstPad *sinkpad = gst_element_get_static_pad (typefind, "sink");
GstPadLinkReturn ret;
ret = gst_pad_link (srcpad, sinkpad);
gst_object_unref (sinkpad);
if (ret != GST_PAD_LINK_OK)
goto could_not_link;
}
urisrc->typefinds = g_list_append (urisrc->typefinds, typefind);
/* connect a signal to find out when the typefind element found
* a type */
g_signal_connect (typefind, "have-type", G_CALLBACK (type_found), urisrc);
/* Now it can start */
gst_element_set_locked_state (typefind, FALSE);
gst_element_sync_state_with_parent (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_ELEMENT_ERROR (urisrc, CORE, NEGOTIATION,
(NULL), ("Can't link source to typefind element"));
gst_bin_remove (GST_BIN_CAST (urisrc), typefind);
return FALSE;
}
}
static void
free_output_slot (OutputSlotInfo * slot, GstURISourceBin * urisrc)
{
GST_DEBUG_OBJECT (urisrc, "removing old queue element and freeing slot %p",
slot);
gst_element_set_locked_state (slot->queue, TRUE);
gst_element_set_state (slot->queue, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (urisrc), slot->queue);
gst_object_unref (slot->sinkpad);
remove_buffering_msgs (urisrc, GST_OBJECT_CAST (slot->queue));
/* deactivate and remove the srcpad */
gst_pad_set_active (slot->srcpad, FALSE);
gst_element_remove_pad (GST_ELEMENT_CAST (urisrc), slot->srcpad);
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");
urisrc->out_slots = g_slist_remove (urisrc->out_slots, 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)
{
GstElement *source = urisrc->source;
if (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;
}
if (urisrc->typefinds) {
GList *iter, *next;
GST_DEBUG_OBJECT (urisrc, "removing old typefind element");
for (iter = urisrc->typefinds; iter; iter = next) {
GstElement *typefind = iter->data;
next = g_list_next (iter);
gst_element_set_state (typefind, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (urisrc), typefind);
}
g_list_free (urisrc->typefinds);
urisrc->typefinds = NULL;
}
GST_URI_SOURCE_BIN_LOCK (urisrc);
g_slist_foreach (urisrc->out_slots, (GFunc) free_output_slot, urisrc);
g_slist_free (urisrc->out_slots);
urisrc->out_slots = NULL;
GST_URI_SOURCE_BIN_UNLOCK (urisrc);
if (urisrc->demuxer) {
GST_DEBUG_OBJECT (urisrc, "removing old adaptive demux element");
gst_element_set_state (urisrc->demuxer, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (urisrc), urisrc->demuxer);
urisrc->demuxer = NULL;
}
}
/* is called when a dynamic source element created a new pad. */
static void
source_new_pad (GstElement * element, GstPad * pad, GstURISourceBin * urisrc)
{
GstCaps *caps;
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);
if (caps == NULL)
setup_typefind (urisrc, pad);
else {
handle_new_pad (urisrc, pad, caps);
gst_caps_unref (caps);
}
}
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 demuxer elements until we found
* all the streams or until a preroll queue has been filled.
*/
static gboolean
setup_source (GstURISourceBin * urisrc)
{
gboolean is_raw, have_out, is_dynamic;
GST_DEBUG_OBJECT (urisrc, "setup source");
/* delete old src */
remove_source (urisrc);
/* 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);
if (is_live_source (urisrc->source))
urisrc->is_stream = FALSE;
/* remove the old demuxer now, if any */
remove_demuxer (urisrc);
/* 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 (urisrc, &is_raw, &have_out, &is_dynamic,
urisrc->need_queue && urisrc->use_buffering))
goto invalid_source;
if (is_raw) {
GST_DEBUG_OBJECT (urisrc, "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 (urisrc));
return TRUE;
}
if (!have_out && !is_dynamic) {
GST_DEBUG_OBJECT (urisrc, "Source has no output pads");
return TRUE;
}
if (is_dynamic) {
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);
} else {
if (urisrc->is_stream) {
GST_DEBUG_OBJECT (urisrc, "Setting up streaming");
/* do the stream things here */
if (!setup_typefind (urisrc, NULL))
goto streaming_failed;
} else {
GstIterator *pads_iter;
gboolean done = FALSE;
pads_iter = gst_element_iterate_src_pads (urisrc->source);
while (!done) {
GValue item = { 0, };
GstPad *pad;
switch (gst_iterator_next (pads_iter, &item)) {
case GST_ITERATOR_ERROR:
GST_WARNING_OBJECT (urisrc,
"Error iterating pads on source element");
/* FALLTROUGH */
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_RESYNC:
/* reset results and resync */
gst_iterator_resync (pads_iter);
break;
case GST_ITERATOR_OK:
pad = g_value_get_object (&item);
if (!setup_typefind (urisrc, pad)) {
gst_iterator_free (pads_iter);
goto streaming_failed;
}
g_value_reset (&item);
break;
}
}
gst_iterator_free (pads_iter);
}
}
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;
}
streaming_failed:
{
/* message was posted */
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 * 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 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
* multiqueue 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);
slot = g_object_get_data (G_OBJECT (GST_MESSAGE_SRC (msg)),
"urisourcebin.slotinfo");
BUFFERING_LOCK (urisrc);
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 = g_object_get_data (G_OBJECT (GST_MESSAGE_SRC (bufstats)),
"urisourcebin.slotinfo");
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 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_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
decoder_query_init (GstURISourceBin * 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 (item, "got duration %" G_GINT64_FORMAT, duration);
if (duration > fold->max)
fold->max = duration;
}
return TRUE;
}
static void
decoder_query_duration_done (GstURISourceBin * 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 (item, "got position %" G_GINT64_FORMAT, position);
if (position > fold->max)
fold->max = position;
}
return TRUE;
}
static void
decoder_query_position_done (GstURISourceBin * 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 (GstURISourceBin * 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 (item, "got seekable %d", seekable);
if (fold->seekable)
fold->seekable = seekable;
}
return TRUE;
}
static void
decoder_query_seeking_done (GstURISourceBin * 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 (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 *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_SOURCE_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_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_DEBUG ("ready to paused");
if (!setup_source (urisrc))
goto source_failed;
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:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_DEBUG ("paused to ready");
remove_demuxer (urisrc);
remove_source (urisrc);
g_list_free_full (urisrc->buffering_status,
(GDestroyNotify) gst_message_unref);
urisrc->buffering_status = NULL;
urisrc->last_buffering_pct = -1;
break;
case GST_STATE_CHANGE_READY_TO_NULL:
GST_DEBUG ("ready to null");
remove_demuxer (urisrc);
remove_source (urisrc);
break;
default:
break;
}
return ret;
/* ERRORS */
source_failed:
{
return GST_STATE_CHANGE_FAILURE;
}
setup_failed:
{
/* clean up leftover groups */
return GST_STATE_CHANGE_FAILURE;
}
}
gboolean
gst_uri_source_bin_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_uri_source_bin_debug, "urisourcebin", 0,
"URI source element");
return gst_element_register (plugin, "urisourcebin", GST_RANK_NONE,
GST_TYPE_URI_SOURCE_BIN);
}
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