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coral / imx-gst-plugins-base / 610169870dea636c690184a3b59b444c63dd8042 / . / gst / playback / gstdecodebin3.c
blob: 07b61048e864d7e5e05429102479c742763f570b [file] [log] [blame]
/* GStreamer
*
* Copyright (C) <2015> Centricular Ltd
* @author: Edward Hervey <edward@centricular.com>
* @author: Jan Schmidt <jan@centricular.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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib.h>
#include <glib-object.h>
#include <glib/gprintf.h>
#include <gst/gst.h>
#include <gst/pbutils/pbutils.h>
#include "gstplayback.h"
#include "gstplay-enum.h"
#include "gstrawcaps.h"
/**
* SECTION:element-decodebin3
* @title: decodebin3
*
* #GstBin that auto-magically constructs a decoding pipeline using available
* decoders and demuxers via auto-plugging. The output is raw audio, video
* or subtitle streams.
*
* decodebin3 differs from the previous decodebin (decodebin2) in important ways:
*
* * supports publication and selection of stream information via
* GstStreamCollection messages and #GST_EVENT_SELECT_STREAM events.
*
* * dynamically switches stream connections internally, and
* reuses decoder elements when stream selections change, so that in
* the normal case it maintains 1 decoder of each type (video/audio/subtitle)
* and only creates new elements when streams change and an existing decoder
* is not capable of handling the new format.
*
* * supports multiple input pads for the parallel decoding of auxilliary streams
* not muxed with the primary stream.
*
* * does not handle network stream buffering. decodebin3 expects that network stream
* buffering is handled upstream, before data is passed to it.
*
* <emphasis>decodebin3 is still experimental API and a technology preview.
* Its behaviour and exposed API is subject to change.</emphasis>
*
*/
/**
* Global design
*
* 1) From sink pad to elementary streams (GstParseBin)
*
* The input sink pads are fed to GstParseBin. GstParseBin will feed them
* through typefind. When the caps are detected (or changed) we recursively
* figure out which demuxer, parser or depayloader is needed until we get to
* elementary streams.
*
* All elementary streams (whether decoded or not, whether exposed or not) are
* fed through multiqueue. There is only *one* multiqueue in decodebin3.
*
* => MultiQueue is the cornerstone.
* => No buffering before multiqueue
*
* 2) Elementary streams
*
* After GstParseBin, there are 3 main components:
* 1) Input Streams (provided by GstParseBin)
* 2) Multiqueue slots
* 3) Output Streams
*
* Input Streams correspond to the stream coming from GstParseBin and that gets
* fed into a multiqueue slot.
*
* Output Streams correspond to the combination of a (optional) decoder and an
* output ghostpad. Output Streams can be moved from one multiqueue slot to
* another, can reconfigure itself (different decoders), and can be
* added/removed depending on the configuration (all streams outputted, only one
* of each type, ...).
*
* Multiqueue slots correspond to a pair of sink/src pad from multiqueue. For
* each 'active' Input Stream there is a corresponding slot.
* Slots might have different streams on input and output (due to internal
* buffering).
*
* Due to internal queuing/buffering/..., all those components (might) behave
* asynchronously. Therefore probes will be used on each component source pad to
* detect various key-points:
* * EOS :
* the stream is done => Mark that component as done, optionally freeing/removing it
* * STREAM_START :
* a new stream is starting => link it further if needed
*
* 3) Gradual replacement
*
* If the caps change at any point in decodebin (input sink pad, demuxer output,
* multiqueue output, ..), we gradually replace (if needed) the following elements.
*
* This is handled by the probes in various locations:
* a) typefind output
* b) multiqueue input (source pad of Input Streams)
* c) multiqueue output (source pad of Multiqueue Slots)
* d) final output (target of source ghostpads)
*
* When CAPS event arrive at those points, one of three things can happen:
* a) There is no elements downstream yet, just create/link-to following elements
* b) There are downstream elements, do a ACCEPT_CAPS query
* b.1) The new CAPS are accepted, keep current configuration
* b.2) The new CAPS are not accepted, remove following elements then do a)
*
* Components:
*
* MultiQ Output
* Input(s) Slots Streams
* /-------------------------------------------\ /-----\ /------------- \
*
* +-------------------------------------------------------------------------+
* | |
* | +---------------------------------------------+ |
* | | GstParseBin(s) | |
* | | +--------------+ | +-----+ |
* | | | |---[parser]-[|--| Mul |---[ decoder ]-[|
* |]--[ typefind ]---| demuxer(s) |------------[| | ti | |
* | | | (if needed) |---[parser]-[|--| qu | |
* | | | |---[parser]-[|--| eu |---[ decoder ]-[|
* | | +--------------+ | +------ ^ |
* | +---------------------------------------------+ ^ | |
* | ^ | | |
* +-----------------------------------------------+--------+-------------+--+
* | | |
* | | |
* Probes --/--------/-------------/
*
* ATOMIC SWITCHING
*
* We want to ensure we re-use decoders when switching streams. This takes place
* at the multiqueue output level.
*
* MAIN CONCEPTS
* 1) Activating a stream (i.e. linking a slot to an output) is only done within
* the streaming thread in the multiqueue_src_probe() and only if the
stream is in the REQUESTED selection.
* 2) Deactivating a stream (i.e. unlinking a slot from an output) is also done
* within the stream thread, but only in a purposefully called IDLE probe
* that calls reassign_slot().
*
* Based on those two principles, 3 "selection" of streams (stream-id) are used:
* 1) requested_selection
* All streams within that list should be activated
* 2) active_selection
* List of streams that are exposed by decodebin
* 3) to_activate
* List of streams that will be moved to requested_selection in the
* reassign_slot() method (i.e. once a stream was deactivated, and the output
* was retargetted)
*/
GST_DEBUG_CATEGORY_STATIC (decodebin3_debug);
#define GST_CAT_DEFAULT decodebin3_debug
#define GST_TYPE_DECODEBIN3 (gst_decodebin3_get_type ())
#define EXTRA_DEBUG 1
#define CUSTOM_FINAL_EOS_QUARK _custom_final_eos_quark_get ()
#define CUSTOM_FINAL_EOS_QUARK_DATA "custom-final-eos"
static GQuark
_custom_final_eos_quark_get (void)
{
static gsize g_quark;
if (g_once_init_enter (&g_quark)) {
gsize quark =
(gsize) g_quark_from_static_string ("decodebin3-custom-final-eos");
g_once_init_leave (&g_quark, quark);
}
return g_quark;
}
typedef struct _GstDecodebin3 GstDecodebin3;
typedef struct _GstDecodebin3Class GstDecodebin3Class;
typedef struct _DecodebinInputStream DecodebinInputStream;
typedef struct _DecodebinInput DecodebinInput;
typedef struct _DecodebinOutputStream DecodebinOutputStream;
struct _GstDecodebin3
{
GstBin bin;
/* input_lock protects the following variables */
GMutex input_lock;
/* Main input (static sink pad) */
DecodebinInput *main_input;
/* Supplementary input (request sink pads) */
GList *other_inputs;
/* counter for input */
guint32 input_counter;
/* Current stream group_id (default : GST_GROUP_ID_INVALID) */
/* FIXME : Needs to be resetted appropriately (when upstream changes ?) */
guint32 current_group_id;
/* End of variables protected by input_lock */
GstElement *multiqueue;
/* selection_lock protects access to following variables */
GMutex selection_lock;
GList *input_streams; /* List of DecodebinInputStream for active collection */
GList *output_streams; /* List of DecodebinOutputStream used for output */
GList *slots; /* List of MultiQueueSlot */
guint slot_id;
/* Active collection */
GstStreamCollection *collection;
/* requested selection of stream-id to activate post-multiqueue */
GList *requested_selection;
/* list of stream-id currently activated in output */
GList *active_selection;
/* List of stream-id that need to be activated (after a stream switch for ex) */
GList *to_activate;
/* Pending select streams event */
guint32 select_streams_seqnum;
/* pending list of streams to select (from downstream) */
GList *pending_select_streams;
/* TRUE if requested_selection was updated, will become FALSE once
* it has fully transitioned to active */
gboolean selection_updated;
/* End of variables protected by selection_lock */
/* List of pending collections.
* FIXME : Is this really needed ? */
GList *pending_collection;
/* Factories */
GMutex factories_lock;
guint32 factories_cookie;
/* All DECODABLE factories */
GList *factories;
/* Only DECODER factories */
GList *decoder_factories;
/* DECODABLE but not DECODER factories */
GList *decodable_factories;
/* counters for pads */
guint32 apadcount, vpadcount, tpadcount, opadcount;
/* Properties */
GstCaps *caps;
};
struct _GstDecodebin3Class
{
GstBinClass class;
gint (*select_stream) (GstDecodebin3 * dbin,
GstStreamCollection * collection, GstStream * stream);
};
/* Input of decodebin, controls input pad and parsebin */
struct _DecodebinInput
{
GstDecodebin3 *dbin;
gboolean is_main;
GstPad *ghost_sink;
GstPad *parsebin_sink;
GstStreamCollection *collection; /* Active collection */
guint group_id;
GstElement *parsebin;
gulong pad_added_sigid;
gulong pad_removed_sigid;
gulong drained_sigid;
/* TRUE if the input got drained
* FIXME : When do we reset it if re-used ?
*/
gboolean drained;
/* HACK : Remove these fields */
/* List of PendingPad structures */
GList *pending_pads;
};
/* Multiqueue Slots */
typedef struct _MultiQueueSlot
{
guint id;
GstDecodebin3 *dbin;
/* Type of stream handled by this slot */
GstStreamType type;
/* Linked input and output */
DecodebinInputStream *input;
/* pending => last stream received on sink pad */
GstStream *pending_stream;
/* active => last stream outputted on source pad */
GstStream *active_stream;
GstPad *sink_pad, *src_pad;
/* id of the MQ src_pad event probe */
gulong probe_id;
gboolean is_drained;
DecodebinOutputStream *output;
} MultiQueueSlot;
/* Streams that are exposed downstream (i.e. output) */
struct _DecodebinOutputStream
{
GstDecodebin3 *dbin;
/* The type of stream handled by this output stream */
GstStreamType type;
/* The slot to which this output stream is currently connected to */
MultiQueueSlot *slot;
GstElement *decoder; /* Optional */
GstPad *decoder_sink, *decoder_src;
gboolean linked;
/* ghostpad */
GstPad *src_pad;
/* Flag if ghost pad is exposed */
gboolean src_exposed;
/* keyframe dropping probe */
gulong drop_probe_id;
};
/* Pending pads from parsebin */
typedef struct _PendingPad
{
GstDecodebin3 *dbin;
DecodebinInput *input;
GstPad *pad;
gulong buffer_probe;
gulong event_probe;
gboolean saw_eos;
} PendingPad;
/* properties */
enum
{
PROP_0,
PROP_CAPS
};
/* signals */
enum
{
SIGNAL_SELECT_STREAM,
SIGNAL_ABOUT_TO_FINISH,
LAST_SIGNAL
};
static guint gst_decodebin3_signals[LAST_SIGNAL] = { 0 };
#define SELECTION_LOCK(dbin) G_STMT_START { \
GST_LOG_OBJECT (dbin, \
"selection locking from thread %p", \
g_thread_self ()); \
g_mutex_lock (&dbin->selection_lock); \
GST_LOG_OBJECT (dbin, \
"selection locked from thread %p", \
g_thread_self ()); \
} G_STMT_END
#define SELECTION_UNLOCK(dbin) G_STMT_START { \
GST_LOG_OBJECT (dbin, \
"selection unlocking from thread %p", \
g_thread_self ()); \
g_mutex_unlock (&dbin->selection_lock); \
} G_STMT_END
#define INPUT_LOCK(dbin) G_STMT_START { \
GST_LOG_OBJECT (dbin, \
"input locking from thread %p", \
g_thread_self ()); \
g_mutex_lock (&dbin->input_lock); \
GST_LOG_OBJECT (dbin, \
"input locked from thread %p", \
g_thread_self ()); \
} G_STMT_END
#define INPUT_UNLOCK(dbin) G_STMT_START { \
GST_LOG_OBJECT (dbin, \
"input unlocking from thread %p", \
g_thread_self ()); \
g_mutex_unlock (&dbin->input_lock); \
} G_STMT_END
GType gst_decodebin3_get_type (void);
#define gst_decodebin3_parent_class parent_class
G_DEFINE_TYPE (GstDecodebin3, gst_decodebin3, GST_TYPE_BIN);
static GstStaticCaps default_raw_caps = GST_STATIC_CAPS (DEFAULT_RAW_CAPS);
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate request_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate video_src_template =
GST_STATIC_PAD_TEMPLATE ("video_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate audio_src_template =
GST_STATIC_PAD_TEMPLATE ("audio_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate text_src_template =
GST_STATIC_PAD_TEMPLATE ("text_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static void gst_decodebin3_dispose (GObject * object);
static void gst_decodebin3_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_decodebin3_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean parsebin_autoplug_continue_cb (GstElement *
parsebin, GstPad * pad, GstCaps * caps, GstDecodebin3 * dbin);
static gint
gst_decodebin3_select_stream (GstDecodebin3 * dbin,
GstStreamCollection * collection, GstStream * stream)
{
GST_LOG_OBJECT (dbin, "default select-stream, returning -1");
return -1;
}
static GstPad *gst_decodebin3_request_new_pad (GstElement * element,
GstPadTemplate * temp, const gchar * name, const GstCaps * caps);
static void gst_decodebin3_handle_message (GstBin * bin, GstMessage * message);
static GstStateChangeReturn gst_decodebin3_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_decodebin3_send_event (GstElement * element,
GstEvent * event);
static void gst_decode_bin_update_factories_list (GstDecodebin3 * dbin);
#if 0
static gboolean have_factory (GstDecodebin3 * dbin, GstCaps * caps,
GstElementFactoryListType ftype);
#endif
static void free_input (GstDecodebin3 * dbin, DecodebinInput * input);
static void free_input_async (GstDecodebin3 * dbin, DecodebinInput * input);
static DecodebinInput *create_new_input (GstDecodebin3 * dbin, gboolean main);
static gboolean set_input_group_id (DecodebinInput * input, guint32 * group_id);
static void reconfigure_output_stream (DecodebinOutputStream * output,
MultiQueueSlot * slot);
static void free_output_stream (GstDecodebin3 * dbin,
DecodebinOutputStream * output);
static DecodebinOutputStream *create_output_stream (GstDecodebin3 * dbin,
GstStreamType type);
static GstPadProbeReturn slot_unassign_probe (GstPad * pad,
GstPadProbeInfo * info, MultiQueueSlot * slot);
static gboolean reassign_slot (GstDecodebin3 * dbin, MultiQueueSlot * slot);
static MultiQueueSlot *get_slot_for_input (GstDecodebin3 * dbin,
DecodebinInputStream * input);
static void link_input_to_slot (DecodebinInputStream * input,
MultiQueueSlot * slot);
static void free_multiqueue_slot (GstDecodebin3 * dbin, MultiQueueSlot * slot);
static void free_multiqueue_slot_async (GstDecodebin3 * dbin,
MultiQueueSlot * slot);
static GstStreamCollection *get_merged_collection (GstDecodebin3 * dbin);
static void update_requested_selection (GstDecodebin3 * dbin);
/* FIXME: Really make all the parser stuff a self-contained helper object */
#include "gstdecodebin3-parse.c"
static gboolean
_gst_int_accumulator (GSignalInvocationHint * ihint,
GValue * return_accu, const GValue * handler_return, gpointer dummy)
{
gint res = g_value_get_int (handler_return);
if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
g_value_set_int (return_accu, res);
if (res == -1)
return TRUE;
return FALSE;
}
static void
gst_decodebin3_class_init (GstDecodebin3Class * klass)
{
GObjectClass *gobject_klass = (GObjectClass *) klass;
GstElementClass *element_class = (GstElementClass *) klass;
GstBinClass *bin_klass = (GstBinClass *) klass;
gobject_klass->dispose = gst_decodebin3_dispose;
gobject_klass->set_property = gst_decodebin3_set_property;
gobject_klass->get_property = gst_decodebin3_get_property;
/* FIXME : ADD PROPERTIES ! */
g_object_class_install_property (gobject_klass, PROP_CAPS,
g_param_spec_boxed ("caps", "Caps",
"The caps on which to stop decoding. (NULL = default)",
GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/* FIXME : ADD SIGNALS ! */
/**
* GstDecodebin3::select-stream
* @decodebin: a #GstDecodebin3
* @collection: a #GstStreamCollection
* @stream: a #GstStream
*
* This signal is emitted whenever @decodebin needs to decide whether
* to expose a @stream of a given @collection.
*
* Returns: 1 if the stream should be selected, 0 if it shouldn't be selected.
* A value of -1 (default) lets @decodebin decide what to do with the stream.
* */
gst_decodebin3_signals[SIGNAL_SELECT_STREAM] =
g_signal_new ("select-stream", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodebin3Class, select_stream),
_gst_int_accumulator, NULL, g_cclosure_marshal_generic,
G_TYPE_INT, 2, GST_TYPE_STREAM_COLLECTION, GST_TYPE_STREAM);
/**
* GstDecodebin3::about-to-finish:
*
* This signal is emitted when the data for the selected URI is
* entirely buffered and it is safe to specify anothe URI.
*/
gst_decodebin3_signals[SIGNAL_ABOUT_TO_FINISH] =
g_signal_new ("about-to-finish", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE,
0, G_TYPE_NONE);
element_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_decodebin3_request_new_pad);
element_class->change_state = GST_DEBUG_FUNCPTR (gst_decodebin3_change_state);
element_class->send_event = GST_DEBUG_FUNCPTR (gst_decodebin3_send_event);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&request_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&video_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&audio_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&text_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
gst_element_class_set_static_metadata (element_class,
"Decoder Bin 3", "Generic/Bin/Decoder",
"Autoplug and decode to raw media",
"Edward Hervey <edward@centricular.com>");
bin_klass->handle_message = gst_decodebin3_handle_message;
klass->select_stream = gst_decodebin3_select_stream;
}
static void
gst_decodebin3_init (GstDecodebin3 * dbin)
{
/* Create main input */
dbin->main_input = create_new_input (dbin, TRUE);
dbin->multiqueue = gst_element_factory_make ("multiqueue", NULL);
g_object_set (dbin->multiqueue, "sync-by-running-time", TRUE,
"max-size-buffers", 0, "use-interleave", TRUE, NULL);
gst_bin_add ((GstBin *) dbin, dbin->multiqueue);
dbin->current_group_id = GST_GROUP_ID_INVALID;
g_mutex_init (&dbin->factories_lock);
g_mutex_init (&dbin->selection_lock);
g_mutex_init (&dbin->input_lock);
dbin->caps = gst_static_caps_get (&default_raw_caps);
GST_OBJECT_FLAG_SET (dbin, GST_BIN_FLAG_STREAMS_AWARE);
}
static void
gst_decodebin3_dispose (GObject * object)
{
GstDecodebin3 *dbin = (GstDecodebin3 *) object;
GList *walk, *next;
if (dbin->factories)
gst_plugin_feature_list_free (dbin->factories);
if (dbin->decoder_factories)
g_list_free (dbin->decoder_factories);
if (dbin->decodable_factories)
g_list_free (dbin->decodable_factories);
g_list_free_full (dbin->requested_selection, g_free);
g_list_free (dbin->active_selection);
g_list_free (dbin->to_activate);
g_list_free (dbin->pending_select_streams);
g_clear_object (&dbin->collection);
free_input (dbin, dbin->main_input);
for (walk = dbin->other_inputs; walk; walk = next) {
DecodebinInput *input = walk->data;
next = g_list_next (walk);
free_input (dbin, input);
dbin->other_inputs = g_list_delete_link (dbin->other_inputs, walk);
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_decodebin3_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDecodebin3 *dbin = (GstDecodebin3 *) object;
/* FIXME : IMPLEMENT */
switch (prop_id) {
case PROP_CAPS:
GST_OBJECT_LOCK (dbin);
if (dbin->caps)
gst_caps_unref (dbin->caps);
dbin->caps = g_value_dup_boxed (value);
GST_OBJECT_UNLOCK (dbin);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_decodebin3_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstDecodebin3 *dbin = (GstDecodebin3 *) object;
/* FIXME : IMPLEMENT */
switch (prop_id) {
case PROP_CAPS:
GST_OBJECT_LOCK (dbin);
g_value_set_boxed (value, dbin->caps);
GST_OBJECT_UNLOCK (dbin);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
parsebin_autoplug_continue_cb (GstElement * parsebin, GstPad * pad,
GstCaps * caps, GstDecodebin3 * dbin)
{
GST_DEBUG_OBJECT (pad, "caps %" GST_PTR_FORMAT, caps);
/* If it matches our target caps, expose it */
if (gst_caps_can_intersect (caps, dbin->caps))
return FALSE;
return TRUE;
}
/* This method should be called whenever a STREAM_START event
* comes out of a given parsebin.
* The caller shall replace the group_id if the function returns TRUE */
static gboolean
set_input_group_id (DecodebinInput * input, guint32 * group_id)
{
GstDecodebin3 *dbin = input->dbin;
if (input->group_id != *group_id) {
if (input->group_id != GST_GROUP_ID_INVALID)
GST_WARNING_OBJECT (dbin,
"Group id changed (%" G_GUINT32_FORMAT " -> %" G_GUINT32_FORMAT
") on input %p ", input->group_id, *group_id, input);
input->group_id = *group_id;
}
if (*group_id != dbin->current_group_id) {
if (dbin->current_group_id == GST_GROUP_ID_INVALID) {
GST_DEBUG_OBJECT (dbin, "Setting current group id to %" G_GUINT32_FORMAT,
*group_id);
dbin->current_group_id = *group_id;
}
*group_id = dbin->current_group_id;
return TRUE;
}
return FALSE;
}
static void
parsebin_drained_cb (GstElement * parsebin, DecodebinInput * input)
{
GstDecodebin3 *dbin = input->dbin;
gboolean all_drained;
GList *tmp;
GST_WARNING_OBJECT (dbin, "input %p drained", input);
input->drained = TRUE;
all_drained = dbin->main_input->drained;
for (tmp = dbin->other_inputs; tmp; tmp = tmp->next) {
DecodebinInput *data = (DecodebinInput *) tmp->data;
all_drained &= data->drained;
}
if (all_drained) {
GST_WARNING_OBJECT (dbin, "All inputs drained. Posting about-to-finish");
g_signal_emit (dbin, gst_decodebin3_signals[SIGNAL_ABOUT_TO_FINISH], 0,
NULL);
}
}
/* Call with INPUT_LOCK taken */
static gboolean
ensure_input_parsebin (GstDecodebin3 * dbin, DecodebinInput * input)
{
gboolean set_state = FALSE;
if (input->parsebin == NULL) {
input->parsebin = gst_element_factory_make ("parsebin", NULL);
if (input->parsebin == NULL)
goto no_parsebin;
input->parsebin = gst_object_ref (input->parsebin);
input->parsebin_sink = gst_element_get_static_pad (input->parsebin, "sink");
input->pad_added_sigid =
g_signal_connect (input->parsebin, "pad-added",
(GCallback) parsebin_pad_added_cb, input);
input->pad_removed_sigid =
g_signal_connect (input->parsebin, "pad-removed",
(GCallback) parsebin_pad_removed_cb, input);
input->drained_sigid =
g_signal_connect (input->parsebin, "drained",
(GCallback) parsebin_drained_cb, input);
g_signal_connect (input->parsebin, "autoplug-continue",
(GCallback) parsebin_autoplug_continue_cb, dbin);
}
if (GST_OBJECT_PARENT (GST_OBJECT (input->parsebin)) != GST_OBJECT (dbin)) {
gst_bin_add (GST_BIN (dbin), input->parsebin);
set_state = TRUE;
}
gst_ghost_pad_set_target (GST_GHOST_PAD (input->ghost_sink),
input->parsebin_sink);
if (set_state)
gst_element_sync_state_with_parent (input->parsebin);
return TRUE;
/* ERRORS */
no_parsebin:
{
gst_element_post_message ((GstElement *) dbin,
gst_missing_element_message_new ((GstElement *) dbin, "parsebin"));
return FALSE;
}
}
static GstPadLinkReturn
gst_decodebin3_input_pad_link (GstPad * pad, GstObject * parent, GstPad * peer)
{
GstDecodebin3 *dbin = (GstDecodebin3 *) parent;
GstPadLinkReturn res = GST_PAD_LINK_OK;
DecodebinInput *input;
GST_LOG_OBJECT (parent, "Got link on input pad %" GST_PTR_FORMAT
". Creating parsebin if needed", pad);
if ((input = g_object_get_data (G_OBJECT (pad), "decodebin.input")) == NULL)
goto fail;
INPUT_LOCK (dbin);
if (!ensure_input_parsebin (dbin, input))
res = GST_PAD_LINK_REFUSED;
INPUT_UNLOCK (dbin);
return res;
fail:
GST_ERROR_OBJECT (parent, "Failed to retrieve input state from ghost pad");
return GST_PAD_LINK_REFUSED;
}
/* Drop duration query during _input_pad_unlink */
static GstPadProbeReturn
query_duration_drop_probe (GstPad * pad, GstPadProbeInfo * info,
DecodebinInput * input)
{
GstPadProbeReturn ret = GST_PAD_PROBE_OK;
if (GST_IS_QUERY (GST_PAD_PROBE_INFO_DATA (info))) {
GstQuery *query = GST_PAD_PROBE_INFO_QUERY (info);
if (GST_QUERY_TYPE (query) == GST_QUERY_DURATION) {
GST_LOG_OBJECT (pad, "stop forwarding query duration");
ret = GST_PAD_PROBE_HANDLED;
}
}
return ret;
}
static void
gst_decodebin3_input_pad_unlink (GstPad * pad, GstObject * parent)
{
GstDecodebin3 *dbin = (GstDecodebin3 *) parent;
DecodebinInput *input;
GST_LOG_OBJECT (parent, "Got unlink on input pad %" GST_PTR_FORMAT
". Removing parsebin.", pad);
if ((input = g_object_get_data (G_OBJECT (pad), "decodebin.input")) == NULL)
goto fail;
INPUT_LOCK (dbin);
if (input->parsebin == NULL) {
INPUT_UNLOCK (dbin);
return;
}
if (GST_OBJECT_PARENT (GST_OBJECT (input->parsebin)) == GST_OBJECT (dbin)) {
GstStreamCollection *collection = NULL;
gulong probe_id = gst_pad_add_probe (input->parsebin_sink,
GST_PAD_PROBE_TYPE_QUERY_UPSTREAM,
(GstPadProbeCallback) query_duration_drop_probe, input, NULL);
/* Clear stream-collection corresponding to current INPUT and post new
* stream-collection message, if needed */
if (input->collection) {
gst_object_unref (input->collection);
input->collection = NULL;
}
SELECTION_LOCK (dbin);
collection = get_merged_collection (dbin);
if (collection && collection != dbin->collection) {
GstMessage *msg;
GST_DEBUG_OBJECT (dbin, "Update Stream Collection");
if (dbin->collection)
gst_object_unref (dbin->collection);
dbin->collection = collection;
msg =
gst_message_new_stream_collection ((GstObject *) dbin,
dbin->collection);
SELECTION_UNLOCK (dbin);
gst_element_post_message (GST_ELEMENT_CAST (dbin), msg);
update_requested_selection (dbin);
} else
SELECTION_UNLOCK (dbin);
gst_bin_remove (GST_BIN (dbin), input->parsebin);
gst_element_set_state (input->parsebin, GST_STATE_NULL);
g_signal_handler_disconnect (input->parsebin, input->pad_removed_sigid);
g_signal_handler_disconnect (input->parsebin, input->pad_added_sigid);
g_signal_handler_disconnect (input->parsebin, input->drained_sigid);
gst_pad_remove_probe (input->parsebin_sink, probe_id);
gst_object_unref (input->parsebin);
gst_object_unref (input->parsebin_sink);
input->parsebin = NULL;
input->parsebin_sink = NULL;
if (!input->is_main) {
dbin->other_inputs = g_list_remove (dbin->other_inputs, input);
free_input_async (dbin, input);
}
}
INPUT_UNLOCK (dbin);
return;
fail:
GST_ERROR_OBJECT (parent, "Failed to retrieve input state from ghost pad");
return;
}
static void
free_input (GstDecodebin3 * dbin, DecodebinInput * input)
{
GST_DEBUG ("Freeing input %p", input);
gst_ghost_pad_set_target (GST_GHOST_PAD (input->ghost_sink), NULL);
gst_element_remove_pad (GST_ELEMENT (dbin), input->ghost_sink);
if (input->parsebin) {
g_signal_handler_disconnect (input->parsebin, input->pad_removed_sigid);
g_signal_handler_disconnect (input->parsebin, input->pad_added_sigid);
g_signal_handler_disconnect (input->parsebin, input->drained_sigid);
gst_element_set_state (input->parsebin, GST_STATE_NULL);
gst_object_unref (input->parsebin);
gst_object_unref (input->parsebin_sink);
}
if (input->collection)
gst_object_unref (input->collection);
g_free (input);
}
static void
free_input_async (GstDecodebin3 * dbin, DecodebinInput * input)
{
GST_LOG_OBJECT (dbin, "pushing input %p on thread pool to free", input);
gst_element_call_async (GST_ELEMENT_CAST (dbin),
(GstElementCallAsyncFunc) free_input, input, NULL);
}
/* Call with INPUT_LOCK taken */
static DecodebinInput *
create_new_input (GstDecodebin3 * dbin, gboolean main)
{
DecodebinInput *input;
input = g_new0 (DecodebinInput, 1);
input->dbin = dbin;
input->is_main = main;
input->group_id = GST_GROUP_ID_INVALID;
if (main)
input->ghost_sink = gst_ghost_pad_new_no_target ("sink", GST_PAD_SINK);
else {
gchar *pad_name = g_strdup_printf ("sink_%u", dbin->input_counter++);
input->ghost_sink = gst_ghost_pad_new_no_target (pad_name, GST_PAD_SINK);
g_free (pad_name);
}
g_object_set_data (G_OBJECT (input->ghost_sink), "decodebin.input", input);
gst_pad_set_link_function (input->ghost_sink, gst_decodebin3_input_pad_link);
gst_pad_set_unlink_function (input->ghost_sink,
gst_decodebin3_input_pad_unlink);
gst_pad_set_active (input->ghost_sink, TRUE);
gst_element_add_pad ((GstElement *) dbin, input->ghost_sink);
return input;
}
static GstPad *
gst_decodebin3_request_new_pad (GstElement * element, GstPadTemplate * temp,
const gchar * name, const GstCaps * caps)
{
GstDecodebin3 *dbin = (GstDecodebin3 *) element;
DecodebinInput *input;
GstPad *res = NULL;
/* We are ignoring names for the time being, not sure it makes any sense
* within the context of decodebin3 ... */
input = create_new_input (dbin, FALSE);
if (input) {
INPUT_LOCK (dbin);
dbin->other_inputs = g_list_append (dbin->other_inputs, input);
res = input->ghost_sink;
INPUT_UNLOCK (dbin);
}
return res;
}
/* Must be called with factories lock! */
static void
gst_decode_bin_update_factories_list (GstDecodebin3 * dbin)
{
guint cookie;
cookie = gst_registry_get_feature_list_cookie (gst_registry_get ());
if (!dbin->factories || dbin->factories_cookie != cookie) {
GList *tmp;
if (dbin->factories)
gst_plugin_feature_list_free (dbin->factories);
if (dbin->decoder_factories)
g_list_free (dbin->decoder_factories);
if (dbin->decodable_factories)
g_list_free (dbin->decodable_factories);
dbin->factories =
gst_element_factory_list_get_elements
(GST_ELEMENT_FACTORY_TYPE_DECODABLE, GST_RANK_MARGINAL);
dbin->factories =
g_list_sort (dbin->factories, gst_plugin_feature_rank_compare_func);
dbin->factories_cookie = cookie;
/* Filter decoder and other decodables */
dbin->decoder_factories = NULL;
dbin->decodable_factories = NULL;
for (tmp = dbin->factories; tmp; tmp = tmp->next) {
GstElementFactory *fact = (GstElementFactory *) tmp->data;
if (gst_element_factory_list_is_type (fact,
GST_ELEMENT_FACTORY_TYPE_DECODER))
dbin->decoder_factories = g_list_append (dbin->decoder_factories, fact);
else
dbin->decodable_factories =
g_list_append (dbin->decodable_factories, fact);
}
}
}
/* Must be called with appropriate lock if list is a protected variable */
static const gchar *
stream_in_list (GList * list, const gchar * sid)
{
GList *tmp;
#if EXTRA_DEBUG
for (tmp = list; tmp; tmp = tmp->next) {
gchar *osid = (gchar *) tmp->data;
GST_DEBUG ("Checking %s against %s", sid, osid);
}
#endif
for (tmp = list; tmp; tmp = tmp->next) {
const gchar *osid = (gchar *) tmp->data;
if (!g_strcmp0 (sid, osid))
return osid;
}
return NULL;
}
static void
update_requested_selection (GstDecodebin3 * dbin)
{
guint i, nb;
GList *tmp = NULL;
GstStreamType used_types = 0;
GstStreamCollection *collection;
/* 1. Is there a pending SELECT_STREAMS we can return straight away since
* the switch handler will take care of the pending selection */
SELECTION_LOCK (dbin);
if (dbin->pending_select_streams) {
GST_DEBUG_OBJECT (dbin,
"No need to create pending selection, SELECT_STREAMS underway");
goto beach;
}
collection = dbin->collection;
if (G_UNLIKELY (collection == NULL)) {
GST_DEBUG_OBJECT (dbin, "No current GstStreamCollection");
goto beach;
}
nb = gst_stream_collection_get_size (collection);
/* 2. If not, are we in EXPOSE_ALL_MODE ? If so, match everything */
GST_FIXME_OBJECT (dbin, "Implement EXPOSE_ALL_MODE");
/* 3. If not, check if we already have some of the streams in the
* existing active/requested selection */
for (i = 0; i < nb; i++) {
GstStream *stream = gst_stream_collection_get_stream (collection, i);
const gchar *sid = gst_stream_get_stream_id (stream);
gint request = -1;
/* Fire select-stream signal to see if outside components want to
* hint at which streams should be selected */
g_signal_emit (G_OBJECT (dbin),
gst_decodebin3_signals[SIGNAL_SELECT_STREAM], 0, collection, stream,
&request);
GST_DEBUG_OBJECT (dbin, "stream %s , request:%d", sid, request);
if (request == 1 || (request == -1
&& (stream_in_list (dbin->requested_selection, sid)
|| stream_in_list (dbin->active_selection, sid)))) {
GstStreamType curtype = gst_stream_get_stream_type (stream);
if (request == 1)
GST_DEBUG_OBJECT (dbin,
"Using stream requested by 'select-stream' signal : %s", sid);
else
GST_DEBUG_OBJECT (dbin,
"Re-using stream already present in requested or active selection : %s",
sid);
tmp = g_list_append (tmp, (gchar *) sid);
used_types |= curtype;
}
}
/* 4. If not, match one stream of each type */
for (i = 0; i < nb; i++) {
GstStream *stream = gst_stream_collection_get_stream (collection, i);
GstStreamType curtype = gst_stream_get_stream_type (stream);
if (!(used_types & curtype)) {
const gchar *sid = gst_stream_get_stream_id (stream);
GST_DEBUG_OBJECT (dbin, "Selecting stream '%s' of type %s",
sid, gst_stream_type_get_name (curtype));
tmp = g_list_append (tmp, (gchar *) sid);
used_types |= curtype;
}
}
beach:
/* Finally set the requested selection */
if (tmp) {
if (dbin->requested_selection) {
GST_FIXME_OBJECT (dbin,
"Replacing non-NULL requested_selection, what should we do ??");
g_list_free_full (dbin->requested_selection, g_free);
}
dbin->requested_selection =
g_list_copy_deep (tmp, (GCopyFunc) g_strdup, NULL);
dbin->selection_updated = TRUE;
g_list_free (tmp);
}
SELECTION_UNLOCK (dbin);
}
/* Call with INPUT_LOCK taken */
static GstStreamCollection *
get_merged_collection (GstDecodebin3 * dbin)
{
gboolean needs_merge = FALSE;
GstStreamCollection *res = NULL;
GList *tmp;
guint i, nb_stream;
/* First check if we need to do a merge or just return the only collection */
res = dbin->main_input->collection;
for (tmp = dbin->other_inputs; tmp; tmp = tmp->next) {
DecodebinInput *input = (DecodebinInput *) tmp->data;
if (input->collection) {
if (res) {
needs_merge = TRUE;
break;
}
res = input->collection;
}
}
if (!needs_merge) {
GST_DEBUG_OBJECT (dbin, "No need to merge, returning %p", res);
return res ? gst_object_ref (res) : NULL;
}
/* We really need to create a new collection */
/* FIXME : Some numbering scheme maybe ?? */
res = gst_stream_collection_new ("decodebin3");
if (dbin->main_input->collection) {
nb_stream = gst_stream_collection_get_size (dbin->main_input->collection);
GST_DEBUG_OBJECT (dbin, "main input %p %d", dbin->main_input, nb_stream);
for (i = 0; i < nb_stream; i++) {
GstStream *stream =
gst_stream_collection_get_stream (dbin->main_input->collection, i);
gst_stream_collection_add_stream (res, gst_object_ref (stream));
}
}
for (tmp = dbin->other_inputs; tmp; tmp = tmp->next) {
DecodebinInput *input = (DecodebinInput *) tmp->data;
GST_DEBUG_OBJECT (dbin, "input %p , collection %p", input,
input->collection);
if (input->collection) {
nb_stream = gst_stream_collection_get_size (input->collection);
GST_DEBUG_OBJECT (dbin, "nb_stream : %d", nb_stream);
for (i = 0; i < nb_stream; i++) {
GstStream *stream =
gst_stream_collection_get_stream (input->collection, i);
gst_stream_collection_add_stream (res, gst_object_ref (stream));
}
}
}
return res;
}
/* Call with INPUT_LOCK taken */
static DecodebinInput *
find_message_parsebin (GstDecodebin3 * dbin, GstElement * child)
{
DecodebinInput *input = NULL;
GstElement *parent = gst_object_ref (child);
GList *tmp;
do {
GstElement *next_parent;
GST_DEBUG_OBJECT (dbin, "parent %s",
parent ? GST_ELEMENT_NAME (parent) : "<NONE>");
if (parent == dbin->main_input->parsebin) {
input = dbin->main_input;
break;
}
for (tmp = dbin->other_inputs; tmp; tmp = tmp->next) {
DecodebinInput *cur = (DecodebinInput *) tmp->data;
if (parent == cur->parsebin) {
input = cur;
break;
}
}
next_parent = (GstElement *) gst_element_get_parent (parent);
gst_object_unref (parent);
parent = next_parent;
} while (parent && parent != (GstElement *) dbin);
if (parent)
gst_object_unref (parent);
return input;
}
static const gchar *
stream_in_collection (GstDecodebin3 * dbin, gchar * sid)
{
guint i, len;
if (dbin->collection == NULL)
return NULL;
len = gst_stream_collection_get_size (dbin->collection);
for (i = 0; i < len; i++) {
GstStream *stream = gst_stream_collection_get_stream (dbin->collection, i);
const gchar *osid = gst_stream_get_stream_id (stream);
if (!g_strcmp0 (sid, osid))
return osid;
}
return NULL;
}
/* Call with INPUT_LOCK taken */
static void
handle_stream_collection (GstDecodebin3 * dbin,
GstStreamCollection * collection, GstElement * child)
{
#ifndef GST_DISABLE_GST_DEBUG
const gchar *upstream_id;
guint i;
#endif
DecodebinInput *input = find_message_parsebin (dbin, child);
if (!input) {
GST_DEBUG_OBJECT (dbin,
"Couldn't find corresponding input, most likely shutting down");
return;
}
/* Replace collection in input */
if (input->collection)
gst_object_unref (input->collection);
input->collection = gst_object_ref (collection);
GST_DEBUG_OBJECT (dbin, "Setting collection %p on input %p", collection,
input);
/* Merge collection if needed */
collection = get_merged_collection (dbin);
#ifndef GST_DISABLE_GST_DEBUG
/* Just some debugging */
upstream_id = gst_stream_collection_get_upstream_id (collection);
GST_DEBUG ("Received Stream Collection. Upstream_id : %s", upstream_id);
GST_DEBUG ("From input %p", input);
GST_DEBUG (" %d streams", gst_stream_collection_get_size (collection));
for (i = 0; i < gst_stream_collection_get_size (collection); i++) {
GstStream *stream = gst_stream_collection_get_stream (collection, i);
GstTagList *taglist;
GstCaps *caps;
GST_DEBUG (" Stream '%s'", gst_stream_get_stream_id (stream));
GST_DEBUG (" type : %s",
gst_stream_type_get_name (gst_stream_get_stream_type (stream)));
GST_DEBUG (" flags : 0x%x", gst_stream_get_stream_flags (stream));
taglist = gst_stream_get_tags (stream);
GST_DEBUG (" tags : %" GST_PTR_FORMAT, taglist);
caps = gst_stream_get_caps (stream);
GST_DEBUG (" caps : %" GST_PTR_FORMAT, caps);
if (taglist)
gst_tag_list_unref (taglist);
if (caps)
gst_caps_unref (caps);
}
#endif
/* Store collection for later usage */
SELECTION_LOCK (dbin);
if (dbin->collection == NULL) {
dbin->collection = collection;
} else {
/* We need to check who emitted this collection (the owner).
* If we already had a collection from that user, this one is an update,
* that is to say that we need to figure out how we are going to re-use
* the streams/slot */
GST_FIXME_OBJECT (dbin, "New collection but already had one ...");
/* FIXME : When do we switch from pending collection to active collection ?
* When all streams from active collection are drained in multiqueue output ? */
gst_object_unref (dbin->collection);
dbin->collection = collection;
/* dbin->pending_collection = */
/* g_list_append (dbin->pending_collection, collection); */
}
SELECTION_UNLOCK (dbin);
}
static void
gst_decodebin3_handle_message (GstBin * bin, GstMessage * message)
{
GstDecodebin3 *dbin = (GstDecodebin3 *) bin;
gboolean posting_collection = FALSE;
GST_DEBUG_OBJECT (bin, "Got Message %s", GST_MESSAGE_TYPE_NAME (message));
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_STREAM_COLLECTION:
{
GstStreamCollection *collection = NULL;
gst_message_parse_stream_collection (message, &collection);
if (collection) {
INPUT_LOCK (dbin);
handle_stream_collection (dbin, collection,
(GstElement *) GST_MESSAGE_SRC (message));
posting_collection = TRUE;
INPUT_UNLOCK (dbin);
}
SELECTION_LOCK (dbin);
if (dbin->collection && collection != dbin->collection) {
/* Replace collection message, we most likely aggregated it */
GstMessage *new_msg;
new_msg =
gst_message_new_stream_collection ((GstObject *) dbin,
dbin->collection);
gst_message_unref (message);
message = new_msg;
}
SELECTION_UNLOCK (dbin);
if (collection)
gst_object_unref (collection);
break;
}
default:
break;
}
GST_BIN_CLASS (parent_class)->handle_message (bin, message);
if (posting_collection) {
/* Figure out a selection for that collection */
update_requested_selection (dbin);
}
}
static DecodebinOutputStream *
find_free_compatible_output (GstDecodebin3 * dbin, GstStream * stream)
{
GList *tmp;
GstStreamType stype = gst_stream_get_stream_type (stream);
for (tmp = dbin->output_streams; tmp; tmp = tmp->next) {
DecodebinOutputStream *output = (DecodebinOutputStream *) tmp->data;
if (output->type == stype && output->slot && output->slot->active_stream) {
GstStream *tstream = output->slot->active_stream;
if (!stream_in_list (dbin->requested_selection,
(gchar *) gst_stream_get_stream_id (tstream))) {
return output;
}
}
}
return NULL;
}
/* Give a certain slot, figure out if it should be linked to an
* output stream
* CALL WITH SELECTION LOCK TAKEN !*/
static DecodebinOutputStream *
get_output_for_slot (MultiQueueSlot * slot)
{
GstDecodebin3 *dbin = slot->dbin;
DecodebinOutputStream *output = NULL;
const gchar *stream_id;
GstCaps *caps;
gchar *id_in_list = NULL;
/* If we already have a configured output, just use it */
if (slot->output != NULL)
return slot->output;
/*
* FIXME
*
* This method needs to be split into multiple parts
*
* 1) Figure out whether stream should be exposed or not
* This is based on autoplug-continue, EXPOSE_ALL_MODE, or presence
* in the default stream attribution
*
* 2) Figure out whether an output stream should be created, whether
* we can re-use the output stream already linked to the slot, or
* whether we need to get re-assigned another (currently used) output
* stream.
*/
stream_id = gst_stream_get_stream_id (slot->active_stream);
caps = gst_stream_get_caps (slot->active_stream);
GST_DEBUG_OBJECT (dbin, "stream %s , %" GST_PTR_FORMAT, stream_id, caps);
gst_caps_unref (caps);
/* 0. Emit autoplug-continue signal for pending caps ? */
GST_FIXME_OBJECT (dbin, "emit autoplug-continue");
/* 1. if in EXPOSE_ALL_MODE, just accept */
GST_FIXME_OBJECT (dbin, "Handle EXPOSE_ALL_MODE");
#if 0
/* FIXME : The idea around this was to avoid activating a stream for
* which we have no decoder. Unfortunately it is way too
* expensive. Need to figure out a better solution */
/* 2. Is there a potential decoder (if one is required) */
if (!gst_caps_can_intersect (caps, dbin->caps)
&& !have_factory (dbin, (GstCaps *) caps,
GST_ELEMENT_FACTORY_TYPE_DECODER)) {
GST_WARNING_OBJECT (dbin, "Don't have a decoder for %" GST_PTR_FORMAT,
caps);
SELECTION_UNLOCK (dbin);
gst_element_post_message (GST_ELEMENT_CAST (dbin),
gst_missing_decoder_message_new (GST_ELEMENT_CAST (dbin), caps));
SELECTION_LOCK (dbin);
return NULL;
}
#endif
/* 3. In default mode check if we should expose */
id_in_list = (gchar *) stream_in_list (dbin->requested_selection, stream_id);
if (id_in_list) {
/* Check if we can steal an existing output stream we could re-use.
* that is:
* * an output stream whose slot->stream is not in requested
* * and is of the same type as this stream
*/
output = find_free_compatible_output (dbin, slot->active_stream);
if (output) {
/* Move this output from its current slot to this slot */
dbin->to_activate =
g_list_append (dbin->to_activate, (gchar *) stream_id);
dbin->requested_selection =
g_list_remove (dbin->requested_selection, id_in_list);
g_free (id_in_list);
SELECTION_UNLOCK (dbin);
gst_pad_add_probe (output->slot->src_pad, GST_PAD_PROBE_TYPE_IDLE,
(GstPadProbeCallback) slot_unassign_probe, output->slot, NULL);
SELECTION_LOCK (dbin);
return NULL;
}
output = create_output_stream (dbin, slot->type);
output->slot = slot;
GST_DEBUG ("Linking slot %p to new output %p", slot, output);
slot->output = output;
dbin->active_selection =
g_list_append (dbin->active_selection, (gchar *) stream_id);
} else
GST_DEBUG ("Not creating any output for slot %p", slot);
return output;
}
/* Returns SELECTED_STREAMS message if active_selection is equal to
* requested_selection, else NULL.
* Must be called with LOCK taken */
static GstMessage *
is_selection_done (GstDecodebin3 * dbin)
{
GList *tmp;
GstMessage *msg;
if (!dbin->selection_updated)
return NULL;
GST_LOG_OBJECT (dbin, "Checking");
if (dbin->to_activate != NULL) {
GST_DEBUG ("Still have streams to activate");
return NULL;
}
for (tmp = dbin->requested_selection; tmp; tmp = tmp->next) {
GST_DEBUG ("Checking requested stream %s", (gchar *) tmp->data);
if (!stream_in_list (dbin->active_selection, (gchar *) tmp->data)) {
GST_DEBUG ("Not in active selection, returning");
return NULL;
}
}
GST_DEBUG_OBJECT (dbin, "Selection active, creating message");
/* We are completely active */
msg = gst_message_new_streams_selected ((GstObject *) dbin, dbin->collection);
GST_MESSAGE_SEQNUM (msg) = dbin->select_streams_seqnum;
for (tmp = dbin->output_streams; tmp; tmp = tmp->next) {
DecodebinOutputStream *output = (DecodebinOutputStream *) tmp->data;
if (output->slot) {
GST_DEBUG_OBJECT (dbin, "Adding stream %s",
gst_stream_get_stream_id (output->slot->active_stream));
gst_message_streams_selected_add (msg, output->slot->active_stream);
} else
GST_WARNING_OBJECT (dbin, "No valid slot for output %p", output);
}
dbin->selection_updated = FALSE;
return msg;
}
/* Must be called with SELECTION_LOCK taken */
static void
check_all_slot_for_eos (GstDecodebin3 * dbin)
{
gboolean all_drained = TRUE;
GList *iter;
GST_DEBUG_OBJECT (dbin, "check slot for eos");
for (iter = dbin->slots; iter; iter = iter->next) {
MultiQueueSlot *slot = iter->data;
if (!slot->output)
continue;
if (slot->is_drained) {
GST_LOG_OBJECT (slot->sink_pad, "slot %p is drained", slot);
continue;
}
all_drained = FALSE;
break;
}
if (all_drained) {
INPUT_LOCK (dbin);
if (!pending_pads_are_eos (dbin->main_input))
all_drained = FALSE;
if (all_drained) {
for (iter = dbin->other_inputs; iter; iter = iter->next) {
if (!pending_pads_are_eos ((DecodebinInput *) iter->data)) {
all_drained = FALSE;
break;
}
}
}
INPUT_UNLOCK (dbin);
}
if (all_drained) {
GST_DEBUG_OBJECT (dbin,
"All active slots are drained, and no pending input, push EOS");
for (iter = dbin->input_streams; iter; iter = iter->next) {
DecodebinInputStream *input = (DecodebinInputStream *) iter->data;
GstPad *peer = gst_pad_get_peer (input->srcpad);
/* Send EOS to all slots */
if (peer) {
GstEvent *stream_start, *eos;
stream_start =
gst_pad_get_sticky_event (input->srcpad, GST_EVENT_STREAM_START, 0);
/* First forward a custom STREAM_START event to reset the EOS status (if any) */
if (stream_start) {
GstStructure *s;
GstEvent *custom_stream_start = gst_event_copy (stream_start);
gst_event_unref (stream_start);
s = (GstStructure *) gst_event_get_structure (custom_stream_start);
gst_structure_set (s, "decodebin3-flushing-stream-start",
G_TYPE_BOOLEAN, TRUE, NULL);
gst_pad_send_event (peer, custom_stream_start);
}
eos = gst_event_new_eos ();
gst_mini_object_set_qdata (GST_MINI_OBJECT_CAST (eos),
CUSTOM_FINAL_EOS_QUARK, (gchar *) CUSTOM_FINAL_EOS_QUARK_DATA,
NULL);
gst_pad_send_event (peer, eos);
gst_object_unref (peer);
} else
GST_DEBUG_OBJECT (dbin, "no output");
}
}
}
static GstPadProbeReturn
multiqueue_src_probe (GstPad * pad, GstPadProbeInfo * info,
MultiQueueSlot * slot)
{
GstPadProbeReturn ret = GST_PAD_PROBE_OK;
GstDecodebin3 *dbin = slot->dbin;
if (GST_IS_EVENT (GST_PAD_PROBE_INFO_DATA (info))) {
GstEvent *ev = GST_PAD_PROBE_INFO_EVENT (info);
GST_DEBUG_OBJECT (pad, "Got event %p %s", ev, GST_EVENT_TYPE_NAME (ev));
switch (GST_EVENT_TYPE (ev)) {
case GST_EVENT_STREAM_START:
{
GstStream *stream = NULL;
const GstStructure *s = gst_event_get_structure (ev);
/* Drop STREAM_START events used to cleanup multiqueue */
if (s
&& gst_structure_has_field (s,
"decodebin3-flushing-stream-start")) {
ret = GST_PAD_PROBE_HANDLED;
gst_event_unref (ev);
break;
}
gst_event_parse_stream (ev, &stream);
if (stream == NULL) {
GST_ERROR_OBJECT (pad,
"Got a STREAM_START event without a GstStream");
break;
}
slot->is_drained = FALSE;
GST_DEBUG_OBJECT (pad, "Stream Start '%s'",
gst_stream_get_stream_id (stream));
if (slot->active_stream == NULL) {
slot->active_stream = stream;
} else if (slot->active_stream != stream) {
GST_FIXME_OBJECT (pad, "Handle stream changes (%s => %s) !",
gst_stream_get_stream_id (slot->active_stream),
gst_stream_get_stream_id (stream));
gst_object_unref (slot->active_stream);
slot->active_stream = stream;
} else
gst_object_unref (stream);
#if 0 /* Disabled because stream-start is pushed for every buffer on every unlinked pad */
{
gboolean is_active, is_requested;
/* Quick check to see if we're in the current selection */
/* FIXME : Re-check all slot<=>output mappings based on requested_selection */
SELECTION_LOCK (dbin);
GST_DEBUG_OBJECT (dbin, "Checking active selection");
is_active = stream_in_list (dbin->active_selection, stream_id);
GST_DEBUG_OBJECT (dbin, "Checking requested selection");
is_requested = stream_in_list (dbin->requested_selection, stream_id);
SELECTION_UNLOCK (dbin);
if (is_active)
GST_DEBUG_OBJECT (pad, "Slot in ACTIVE selection (output:%p)",
slot->output);
if (is_requested)
GST_DEBUG_OBJECT (pad, "Slot in REQUESTED selection (output:%p)",
slot->output);
else if (slot->output) {
GST_DEBUG_OBJECT (pad,
"Slot needs to be deactivated ? It's no longer in requested selection");
} else if (!is_active)
GST_DEBUG_OBJECT (pad,
"Slot in neither active nor requested selection");
}
#endif
}
break;
case GST_EVENT_CAPS:
{
/* Configure the output slot if needed */
DecodebinOutputStream *output;
GstMessage *msg = NULL;
SELECTION_LOCK (dbin);
output = get_output_for_slot (slot);
if (output) {
reconfigure_output_stream (output, slot);
msg = is_selection_done (dbin);
}
SELECTION_UNLOCK (dbin);
if (msg)
gst_element_post_message ((GstElement *) slot->dbin, msg);
}
break;
case GST_EVENT_EOS:
{
gboolean was_drained = slot->is_drained;
slot->is_drained = TRUE;
/* Custom EOS handling first */
if (gst_mini_object_get_qdata (GST_MINI_OBJECT_CAST (ev),
CUSTOM_EOS_QUARK)) {
/* remove custom-eos */
gst_mini_object_set_qdata (GST_MINI_OBJECT_CAST (ev),
CUSTOM_EOS_QUARK, NULL, NULL);
GST_LOG_OBJECT (pad, "Received custom EOS");
ret = GST_PAD_PROBE_HANDLED;
SELECTION_LOCK (dbin);
if (slot->input == NULL) {
GST_DEBUG_OBJECT (pad,
"Got custom-eos from null input stream, remove output stream");
/* Remove the output */
if (slot->output) {
DecodebinOutputStream *output = slot->output;
dbin->output_streams =
g_list_remove (dbin->output_streams, output);
free_output_stream (dbin, output);
}
slot->probe_id = 0;
dbin->slots = g_list_remove (dbin->slots, slot);
free_multiqueue_slot_async (dbin, slot);
ret = GST_PAD_PROBE_REMOVE;
} else if (!was_drained) {
check_all_slot_for_eos (dbin);
}
SELECTION_UNLOCK (dbin);
break;
}
GST_FIXME_OBJECT (pad, "EOS on multiqueue source pad. input:%p",
slot->input);
if (slot->input == NULL) {
GstPad *peer;
GST_DEBUG_OBJECT (pad,
"last EOS for input, forwarding and removing slot");
peer = gst_pad_get_peer (pad);
if (peer) {
gst_pad_send_event (peer, ev);
gst_object_unref (peer);
} else {
gst_event_unref (ev);
}
SELECTION_LOCK (dbin);
/* FIXME : Shouldn't we try to re-assign the output instead of just
* removing it ? */
/* Remove the output */
if (slot->output) {
DecodebinOutputStream *output = slot->output;
dbin->output_streams = g_list_remove (dbin->output_streams, output);
free_output_stream (dbin, output);
}
slot->probe_id = 0;
dbin->slots = g_list_remove (dbin->slots, slot);
SELECTION_UNLOCK (dbin);
free_multiqueue_slot_async (dbin, slot);
ret = GST_PAD_PROBE_REMOVE;
} else if (gst_mini_object_get_qdata (GST_MINI_OBJECT_CAST (ev),
CUSTOM_FINAL_EOS_QUARK)) {
GST_DEBUG_OBJECT (pad, "Got final eos, propagating downstream");
} else {
GST_DEBUG_OBJECT (pad, "Got regular eos (all_inputs_are_eos)");
/* drop current event as eos will be sent in check_all_slot_for_eos
* when all output streams are also eos */
ret = GST_PAD_PROBE_DROP;
SELECTION_LOCK (dbin);
check_all_slot_for_eos (dbin);
SELECTION_UNLOCK (dbin);
}
}
break;
default:
break;
}
} else if (GST_IS_QUERY (GST_PAD_PROBE_INFO_DATA (info))) {
GstQuery *query = GST_PAD_PROBE_INFO_QUERY (info);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
{
GST_DEBUG_OBJECT (pad, "Intercepting CAPS query");
gst_query_set_caps_result (query, GST_CAPS_ANY);
ret = GST_PAD_PROBE_HANDLED;
}
break;
case GST_QUERY_ACCEPT_CAPS:
{
GST_DEBUG_OBJECT (pad, "Intercepting Accept Caps query");
/* If the current decoder doesn't accept caps, we'll reconfigure
* on the actual caps event. So accept any caps. */
gst_query_set_accept_caps_result (query, TRUE);
ret = GST_PAD_PROBE_HANDLED;
}
default:
break;
}
}
return ret;
}
/* Create a new multiqueue slot for the given type
*
* It is up to the caller to know whether that slot is needed or not
* (and release it when no longer needed) */
static MultiQueueSlot *
create_new_slot (GstDecodebin3 * dbin, GstStreamType type)
{
MultiQueueSlot *slot;
GstIterator *it = NULL;
GValue item = { 0, };
GST_DEBUG_OBJECT (dbin, "Creating new slot for type %s",
gst_stream_type_get_name (type));
slot = g_new0 (MultiQueueSlot, 1);
slot->dbin = dbin;
slot->id = dbin->slot_id++;
slot->type = type;
slot->sink_pad = gst_element_get_request_pad (dbin->multiqueue, "sink_%u");
if (slot->sink_pad == NULL)
goto fail;
it = gst_pad_iterate_internal_links (slot->sink_pad);
if (!it || (gst_iterator_next (it, &item)) != GST_ITERATOR_OK
|| ((slot->src_pad = g_value_dup_object (&item)) == NULL)) {
GST_ERROR ("Couldn't get srcpad from multiqueue for sink pad %s:%s",
GST_DEBUG_PAD_NAME (slot->src_pad));
goto fail;
}
gst_iterator_free (it);
g_value_reset (&item);
g_object_set (slot->sink_pad, "group-id", (guint) type, NULL);
/* Add event probe */
slot->probe_id =
gst_pad_add_probe (slot->src_pad,
GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM | GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM,
(GstPadProbeCallback) multiqueue_src_probe, slot, NULL);
GST_DEBUG ("Created new slot %u (%p) (%s:%s)", slot->id, slot,
GST_DEBUG_PAD_NAME (slot->src_pad));
dbin->slots = g_list_append (dbin->slots, slot);
return slot;
/* ERRORS */
fail:
{
if (slot->sink_pad)
gst_element_release_request_pad (dbin->multiqueue, slot->sink_pad);
g_free (slot);
return NULL;
}
}
/* Must be called with SELECTION_LOCK */
static MultiQueueSlot *
get_slot_for_input (GstDecodebin3 * dbin, DecodebinInputStream * input)
{
GList *tmp;
MultiQueueSlot *empty_slot = NULL;
GstStreamType input_type = 0;
gchar *stream_id = NULL;
GST_DEBUG_OBJECT (dbin, "input %p (stream %p %s)",
input, input->active_stream,
input->
active_stream ? gst_stream_get_stream_id (input->active_stream) : "");
if (input->active_stream) {
input_type = gst_stream_get_stream_type (input->active_stream);
stream_id = (gchar *) gst_stream_get_stream_id (input->active_stream);
}
/* Go over existing slots and check if there is already one for it */
for (tmp = dbin->slots; tmp; tmp = tmp->next) {
MultiQueueSlot *slot = (MultiQueueSlot *) tmp->data;
/* Already used input, return that one */
if (slot->input == input) {
GST_DEBUG_OBJECT (dbin, "Returning already specified slot %d", slot->id);
return slot;
}
}
/* Go amongst all unused slots of the right type and try to find a candidate */
for (tmp = dbin->slots; tmp; tmp = tmp->next) {
MultiQueueSlot *slot = (MultiQueueSlot *) tmp->data;
if (slot->input == NULL && input_type == slot->type) {
/* Remember this empty slot for later */
empty_slot = slot;
/* Check if available slot is of the same stream_id */
GST_LOG_OBJECT (dbin, "Checking candidate slot %d (active_stream:%p)",
slot->id, slot->active_stream);
if (stream_id && slot->active_stream) {
gchar *ostream_id =
(gchar *) gst_stream_get_stream_id (slot->active_stream);
GST_DEBUG_OBJECT (dbin, "Checking slot %d %s against %s", slot->id,
ostream_id, stream_id);
if (!g_strcmp0 (stream_id, ostream_id))
break;
}
}
}
if (empty_slot) {
GST_DEBUG_OBJECT (dbin, "Re-using existing unused slot %d", empty_slot->id);
empty_slot->input = input;
return empty_slot;
}
if (input_type)
return create_new_slot (dbin, input_type);
return NULL;
}
static void
link_input_to_slot (DecodebinInputStream * input, MultiQueueSlot * slot)
{
if (slot->input != NULL && slot->input != input) {
GST_ERROR_OBJECT (slot->dbin,
"Trying to link input to an already used slot");
return;
}
gst_pad_link_full (input->srcpad, slot->sink_pad, GST_PAD_LINK_CHECK_NOTHING);
slot->pending_stream = input->active_stream;
slot->input = input;
}
#if 0
static gboolean
have_factory (GstDecodebin3 * dbin, GstCaps * caps,
GstElementFactoryListType ftype)
{
gboolean ret = FALSE;
GList *res;
g_mutex_lock (&dbin->factories_lock);
gst_decode_bin_update_factories_list (dbin);
if (ftype == GST_ELEMENT_FACTORY_TYPE_DECODER)
res =
gst_element_factory_list_filter (dbin->decoder_factories,
caps, GST_PAD_SINK, TRUE);
else
res =
gst_element_factory_list_filter (dbin->decodable_factories,
caps, GST_PAD_SINK, TRUE);
g_mutex_unlock (&dbin->factories_lock);
if (res) {
ret = TRUE;
gst_plugin_feature_list_free (res);
}
return ret;
}
#endif
static GstElement *
create_element (GstDecodebin3 * dbin, GstStream * stream,
GstElementFactoryListType ftype)
{
GList *res;
GstElement *element = NULL;
GstCaps *caps;
g_mutex_lock (&dbin->factories_lock);
gst_decode_bin_update_factories_list (dbin);
caps = gst_stream_get_caps (stream);
if (ftype == GST_ELEMENT_FACTORY_TYPE_DECODER)
res =
gst_element_factory_list_filter (dbin->decoder_factories,
caps, GST_PAD_SINK, TRUE);
else
res =
gst_element_factory_list_filter (dbin->decodable_factories,
caps, GST_PAD_SINK, TRUE);
g_mutex_unlock (&dbin->factories_lock);
if (res) {
element =
gst_element_factory_create ((GstElementFactory *) res->data, NULL);
GST_DEBUG ("Created element '%s'", GST_ELEMENT_NAME (element));
gst_plugin_feature_list_free (res);
} else {
GST_DEBUG ("Could not find an element for caps %" GST_PTR_FORMAT, caps);
}
gst_caps_unref (caps);
return element;
}
/* FIXME : VERY NAIVE. ASSUMING FIRST ONE WILL WORK */
static GstElement *
create_decoder (GstDecodebin3 * dbin, GstStream * stream)
{
return create_element (dbin, stream, GST_ELEMENT_FACTORY_TYPE_DECODER);
}
static GstPadProbeReturn
keyframe_waiter_probe (GstPad * pad, GstPadProbeInfo * info,
DecodebinOutputStream * output)
{
GstBuffer *buf = GST_PAD_PROBE_INFO_BUFFER (info);
/* If we have a keyframe, remove the probe and let all data through */
/* FIXME : HANDLE HEADER BUFFER ?? */
if (!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT) ||
GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_HEADER)) {
GST_DEBUG_OBJECT (pad,
"Buffer is keyframe or header, letting through and removing probe");
output->drop_probe_id = 0;
return GST_PAD_PROBE_REMOVE;
}
GST_DEBUG_OBJECT (pad, "Buffer is not a keyframe, dropping");
return GST_PAD_PROBE_DROP;
}
static void
reconfigure_output_stream (DecodebinOutputStream * output,
MultiQueueSlot * slot)
{
GstDecodebin3 *dbin = output->dbin;
GstCaps *new_caps = (GstCaps *) gst_stream_get_caps (slot->active_stream);
gboolean needs_decoder;
needs_decoder = gst_caps_can_intersect (new_caps, dbin->caps) != TRUE;
GST_DEBUG_OBJECT (dbin,
"Reconfiguring output %p to slot %p, needs_decoder:%d", output, slot,
needs_decoder);
/* FIXME : Maybe make the output un-hook itself automatically ? */
if (output->slot != NULL && output->slot != slot) {
GST_WARNING_OBJECT (dbin,
"Output still linked to another slot (%p)", output->slot);
gst_caps_unref (new_caps);
return;
}
/* Check if existing config is reusable as-is by checking if
* the existing decoder accepts the new caps, if not delete
* it and create a new one */
if (output->decoder) {
gboolean can_reuse_decoder;
if (needs_decoder) {
can_reuse_decoder =
gst_pad_query_accept_caps (output->decoder_sink, new_caps);
} else
can_reuse_decoder = FALSE;
if (can_reuse_decoder) {
if (output->type & GST_STREAM_TYPE_VIDEO && output->drop_probe_id == 0) {
GST_DEBUG_OBJECT (dbin, "Adding keyframe-waiter probe");
output->drop_probe_id =
gst_pad_add_probe (slot->src_pad, GST_PAD_PROBE_TYPE_BUFFER,
(GstPadProbeCallback) keyframe_waiter_probe, output, NULL);
}
GST_DEBUG_OBJECT (dbin, "Reusing existing decoder for slot %p", slot);
if (output->linked == FALSE) {
gst_pad_link_full (slot->src_pad, output->decoder_sink,
GST_PAD_LINK_CHECK_NOTHING);
output->linked = TRUE;
}
gst_caps_unref (new_caps);
return;
}
GST_DEBUG_OBJECT (dbin, "Removing old decoder for slot %p", slot);
if (output->linked)
gst_pad_unlink (slot->src_pad, output->decoder_sink);
output->linked = FALSE;
if (output->drop_probe_id) {
gst_pad_remove_probe (slot->src_pad, output->drop_probe_id);
output->drop_probe_id = 0;
}
if (!gst_ghost_pad_set_target ((GstGhostPad *) output->src_pad, NULL)) {
GST_ERROR_OBJECT (dbin, "Could not release decoder pad");
gst_caps_unref (new_caps);
goto cleanup;
}
gst_element_set_locked_state (output->decoder, TRUE);
gst_element_set_state (output->decoder, GST_STATE_NULL);
gst_bin_remove ((GstBin *) dbin, output->decoder);
output->decoder = NULL;
}
gst_caps_unref (new_caps);
gst_object_replace ((GstObject **) & output->decoder_sink, NULL);
gst_object_replace ((GstObject **) & output->decoder_src, NULL);
/* If a decoder is required, create one */
if (needs_decoder) {
/* If we don't have a decoder yet, instantiate one */
output->decoder = create_decoder (dbin, slot->active_stream);
if (output->decoder == NULL) {
GstCaps *caps;
SELECTION_UNLOCK (dbin);
/* FIXME : Should we be smarter if there's a missing decoder ?
* Should we deactivate that stream ? */
caps = gst_stream_get_caps (slot->active_stream);
gst_element_post_message (GST_ELEMENT_CAST (dbin),
gst_missing_decoder_message_new (GST_ELEMENT_CAST (dbin), caps));
gst_caps_unref (caps);
SELECTION_LOCK (dbin);
goto cleanup;
}
if (!gst_bin_add ((GstBin *) dbin, output->decoder)) {
GST_ERROR_OBJECT (dbin, "could not add decoder to pipeline");
goto cleanup;
}
output->decoder_sink = gst_element_get_static_pad (output->decoder, "sink");
output->decoder_src = gst_element_get_static_pad (output->decoder, "src");
if (output->type & GST_STREAM_TYPE_VIDEO) {
GST_DEBUG_OBJECT (dbin, "Adding keyframe-waiter probe");
output->drop_probe_id =
gst_pad_add_probe (slot->src_pad, GST_PAD_PROBE_TYPE_BUFFER,
(GstPadProbeCallback) keyframe_waiter_probe, output, NULL);
}
if (gst_pad_link_full (slot->src_pad, output->decoder_sink,
GST_PAD_LINK_CHECK_NOTHING) != GST_PAD_LINK_OK) {
GST_ERROR_OBJECT (dbin, "could not link to %s:%s",
GST_DEBUG_PAD_NAME (output->decoder_sink));
goto cleanup;
}
} else {
output->decoder_src = gst_object_ref (slot->src_pad);
output->decoder_sink = NULL;
}
output->linked = TRUE;
if (!gst_ghost_pad_set_target ((GstGhostPad *) output->src_pad,
output->decoder_src)) {
GST_ERROR_OBJECT (dbin, "Could not expose decoder pad");
goto cleanup;
}
if (output->src_exposed == FALSE) {
output->src_exposed = TRUE;
gst_element_add_pad (GST_ELEMENT_CAST (dbin), output->src_pad);
}
if (output->decoder)
gst_element_sync_state_with_parent (output->decoder);
output->slot = slot;
return;
cleanup:
{
GST_DEBUG_OBJECT (dbin, "Cleanup");
if (output->decoder_sink) {
gst_object_unref (output->decoder_sink);
output->decoder_sink = NULL;
}
if (output->decoder_src) {
gst_object_unref (output->decoder_src);
output->decoder_src = NULL;
}
if (output->decoder) {
gst_element_set_state (output->decoder, GST_STATE_NULL);
gst_bin_remove ((GstBin *) dbin, output->decoder);
output->decoder = NULL;
}
}
}
static GstPadProbeReturn
idle_reconfigure (GstPad * pad, GstPadProbeInfo * info, MultiQueueSlot * slot)
{
GstMessage *msg = NULL;
DecodebinOutputStream *output;
SELECTION_LOCK (slot->dbin);
output = get_output_for_slot (slot);
GST_DEBUG_OBJECT (pad, "output : %p", output);
if (output) {
reconfigure_output_stream (output, slot);
msg = is_selection_done (slot->dbin);
}
SELECTION_UNLOCK (slot->dbin);
if (msg)
gst_element_post_message ((GstElement *) slot->dbin, msg);
return GST_PAD_PROBE_REMOVE;
}
static MultiQueueSlot *
find_slot_for_stream_id (GstDecodebin3 * dbin, const gchar * sid)
{
GList *tmp;
for (tmp = dbin->slots; tmp; tmp = tmp->next) {
MultiQueueSlot *slot = (MultiQueueSlot *) tmp->data;
const gchar *stream_id;
if (slot->active_stream) {
stream_id = gst_stream_get_stream_id (slot->active_stream);
if (!g_strcmp0 (sid, stream_id))
return slot;
}
if (slot->pending_stream && slot->pending_stream != slot->active_stream) {
stream_id = gst_stream_get_stream_id (slot->pending_stream);
if (!g_strcmp0 (sid, stream_id))
return slot;
}
}
return NULL;
}
/* This function handles the reassignment of a slot. Call this from
* the streaming thread of a slot. */
static gboolean
reassign_slot (GstDecodebin3 * dbin, MultiQueueSlot * slot)
{
DecodebinOutputStream *output;
MultiQueueSlot *target_slot = NULL;
GList *tmp;
const gchar *sid, *tsid;
SELECTION_LOCK (dbin);
output = slot->output;
if (G_UNLIKELY (slot->active_stream == NULL)) {
GST_DEBUG_OBJECT (slot->src_pad,
"Called on inactive slot (active_stream == NULL)");
SELECTION_UNLOCK (dbin);
return FALSE;
}
if (G_UNLIKELY (output == NULL)) {
GST_DEBUG_OBJECT (slot->src_pad,
"Slot doesn't have any output to be removed");
SELECTION_UNLOCK (dbin);
return FALSE;
}
sid = gst_stream_get_stream_id (slot->active_stream);
GST_DEBUG_OBJECT (slot->src_pad, "slot %s %p", sid, slot);
/* Recheck whether this stream is still in the list of streams to deactivate */
if (stream_in_list (dbin->requested_selection, sid)) {
/* Stream is in the list of requested streams, don't remove */
SELECTION_UNLOCK (dbin);
GST_DEBUG_OBJECT (slot->src_pad,
"Stream '%s' doesn't need to be deactivated", sid);
return FALSE;
}
/* Unlink slot from output */
/* FIXME : Handle flushing ? */
/* FIXME : Handle outputs without decoders */
GST_DEBUG_OBJECT (slot->src_pad, "Unlinking from decoder %p",
output->decoder_sink);
if (output->decoder_sink)
gst_pad_unlink (slot->src_pad, output->decoder_sink);
output->linked = FALSE;
slot->output = NULL;
output->slot = NULL;
/* Remove sid from active selection */
for (tmp = dbin->active_selection; tmp; tmp = tmp->next)
if (!g_strcmp0 (sid, tmp->data)) {
dbin->active_selection = g_list_delete_link (dbin->active_selection, tmp);
break;
}
/* Can we re-assign this output to a requested stream ? */
GST_DEBUG_OBJECT (slot->src_pad, "Attempting to re-assing output stream");
for (tmp = dbin->to_activate; tmp; tmp = tmp->next) {
MultiQueueSlot *tslot = find_slot_for_stream_id (dbin, tmp->data);
GST_LOG_OBJECT (tslot->src_pad, "Checking slot %p (output:%p , stream:%s)",
tslot, tslot->output, gst_stream_get_stream_id (tslot->active_stream));
if (tslot && tslot->type == output->type && tslot->output == NULL) {
GST_DEBUG_OBJECT (tslot->src_pad, "Using as reassigned slot");
target_slot = tslot;
tsid = tmp->data;
/* Pass target stream id to requested selection */
dbin->requested_selection =
g_list_append (dbin->requested_selection, g_strdup (tmp->data));
dbin->to_activate = g_list_remove (dbin->to_activate, tmp->data);
break;
}
}
if (target_slot) {
GST_DEBUG_OBJECT (slot->src_pad, "Assigning output to slot %p '%s'",
target_slot, tsid);
target_slot->output = output;
output->slot = target_slot;
dbin->active_selection =
g_list_append (dbin->active_selection, (gchar *) tsid);
SELECTION_UNLOCK (dbin);
/* Wakeup the target slot so that it retries to send events/buffers
* thereby triggering the output reconfiguration codepath */
gst_pad_add_probe (target_slot->src_pad, GST_PAD_PROBE_TYPE_IDLE,
(GstPadProbeCallback) idle_reconfigure, target_slot, NULL);
/* gst_pad_send_event (target_slot->src_pad, gst_event_new_reconfigure ()); */
} else {
GstMessage *msg;
dbin->output_streams = g_list_remove (dbin->output_streams, output);
free_output_stream (dbin, output);
msg = is_selection_done (slot->dbin);
SELECTION_UNLOCK (dbin);
if (msg)
gst_element_post_message ((GstElement *) slot->dbin, msg);
}
return TRUE;
}
/* Idle probe called when a slot should be unassigned from its output stream.
* This is needed to ensure nothing is flowing when unlinking the slot.
*
* Also, this method will search for a pending stream which could re-use
* the output stream. */
static GstPadProbeReturn
slot_unassign_probe (GstPad * pad, GstPadProbeInfo * info,
MultiQueueSlot * slot)
{
GstDecodebin3 *dbin = slot->dbin;
reassign_slot (dbin, slot);
return GST_PAD_PROBE_REMOVE;
}
static gboolean
handle_stream_switch (GstDecodebin3 * dbin, GList * select_streams,
guint32 seqnum)
{
gboolean ret = TRUE;
GList *tmp;
/* List of slots to (de)activate. */
GList *to_deactivate = NULL;
GList *to_activate = NULL;
/* List of unknown stream id, most likely means the event
* should be sent upstream so that elements can expose the requested stream */
GList *unknown = NULL;
GList *to_reassign = NULL;
GList *future_request_streams = NULL;
GList *pending_streams = NULL;
GList *slots_to_reassign = NULL;
SELECTION_LOCK (dbin);
if (G_UNLIKELY (seqnum != dbin->select_streams_seqnum)) {
GST_DEBUG_OBJECT (dbin, "New SELECT_STREAMS has arrived in the meantime");
SELECTION_UNLOCK (dbin);
return TRUE;
}
/* Remove pending select_streams */
g_list_free (dbin->pending_select_streams);
dbin->pending_select_streams = NULL;
/* COMPARE the requested streams to the active and requested streams
* on multiqueue. */
/* First check the slots to activate and which ones are unknown */
for (tmp = select_streams; tmp; tmp = tmp->next) {
const gchar *sid = (const gchar *) tmp->data;
MultiQueueSlot *slot;
GST_DEBUG_OBJECT (dbin, "Checking stream '%s'", sid);
slot = find_slot_for_stream_id (dbin, sid);
/* Find the corresponding slot */
if (slot == NULL) {
if (stream_in_collection (dbin, (gchar *) sid)) {
pending_streams = g_list_append (pending_streams, (gchar *) sid);
} else {
GST_DEBUG_OBJECT (dbin, "We don't have a slot for stream '%s'", sid);
unknown = g_list_append (unknown, (gchar *) sid);
}
} else if (slot->output == NULL) {
GST_DEBUG_OBJECT (dbin, "We need to activate slot %p for stream '%s')",
slot, sid);
to_activate = g_list_append (to_activate, slot);
} else {
GST_DEBUG_OBJECT (dbin,
"Stream '%s' from slot %p is already active on output %p", sid, slot,
slot->output);
future_request_streams =
g_list_append (future_request_streams, (gchar *) sid);
}
}
for (tmp = dbin->slots; tmp; tmp = tmp->next) {
MultiQueueSlot *slot = (MultiQueueSlot *) tmp->data;
/* For slots that have an output, check if it's part of the streams to
* be active */
if (slot->output) {
gboolean slot_to_deactivate = TRUE;
if (slot->active_stream) {
if (stream_in_list (select_streams,
gst_stream_get_stream_id (slot->active_stream)))
slot_to_deactivate = FALSE;
}
if (slot_to_deactivate && slot->pending_stream
&& slot->pending_stream != slot->active_stream) {
if (stream_in_list (select_streams,
gst_stream_get_stream_id (slot->pending_stream)))
slot_to_deactivate = FALSE;
}
if (slot_to_deactivate) {
GST_DEBUG_OBJECT (dbin,
"Slot %p (%s) should be deactivated, no longer used", slot,
slot->
active_stream ? gst_stream_get_stream_id (slot->active_stream) :
"NULL");
to_deactivate = g_list_append (to_deactivate, slot);
}
}
}
if (to_deactivate != NULL) {
GST_DEBUG_OBJECT (dbin, "Check if we can reassign slots");
/* We need to compare what needs to be activated and deactivated in order
* to determine whether there are outputs that can be transferred */
/* Take the stream-id of the slots that are to be activated, for which there
* is a slot of the same type that needs to be deactivated */
tmp = to_deactivate;
while (tmp) {
MultiQueueSlot *slot_to_deactivate = (MultiQueueSlot *) tmp->data;
gboolean removeit = FALSE;
GList *tmp2, *next;
GST_DEBUG_OBJECT (dbin,
"Checking if slot to deactivate (%p) has a candidate slot to activate",
slot_to_deactivate);
for (tmp2 = to_activate; tmp2; tmp2 = tmp2->next) {
MultiQueueSlot *slot_to_activate = (MultiQueueSlot *) tmp2->data;
GST_DEBUG_OBJECT (dbin, "Comparing to slot %p", slot_to_activate);
if (slot_to_activate->type == slot_to_deactivate->type) {
GST_DEBUG_OBJECT (dbin, "Re-using");
to_reassign = g_list_append (to_reassign, (gchar *)
gst_stream_get_stream_id (slot_to_activate->active_stream));
slots_to_reassign =
g_list_append (slots_to_reassign, slot_to_deactivate);
to_activate = g_list_remove (to_activate, slot_to_activate);
removeit = TRUE;
break;
}
}
next = tmp->next;
if (removeit)
to_deactivate = g_list_delete_link (to_deactivate, tmp);
tmp = next;
}
}
for (tmp = to_deactivate; tmp; tmp = tmp->next) {
MultiQueueSlot *slot = (MultiQueueSlot *) tmp->data;
GST_DEBUG_OBJECT (dbin,
"Really need to deactivate slot %p, but no available alternative",
slot);
slots_to_reassign = g_list_append (slots_to_reassign, slot);
}
/* The only slots left to activate are the ones that won't be reassigned and
* therefore really need to have a new output created */
for (tmp = to_activate; tmp; tmp = tmp->next) {
MultiQueueSlot *slot = (MultiQueueSlot *) tmp->data;
if (slot->active_stream)
future_request_streams =
g_list_append (future_request_streams,
(gchar *) gst_stream_get_stream_id (slot->active_stream));
else if (slot->pending_stream)
future_request_streams =
g_list_append (future_request_streams,
(gchar *) gst_stream_get_stream_id (slot->pending_stream));
else
GST_ERROR_OBJECT (dbin, "No stream for slot %p !!", slot);
}
if (to_activate == NULL && pending_streams != NULL) {
GST_DEBUG_OBJECT (dbin, "Stream switch requested for future collection");
if (dbin->requested_selection)
g_list_free_full (dbin->requested_selection, g_free);
dbin->requested_selection =
g_list_copy_deep (select_streams, (GCopyFunc) g_strdup, NULL);
g_list_free (to_deactivate);
g_list_free (pending_streams);
to_deactivate = NULL;
pending_streams = NULL;
} else {
if (dbin->requested_selection)
g_list_free_full (dbin->requested_selection, g_free);
dbin->requested_selection =
g_list_copy_deep (future_request_streams, (GCopyFunc) g_strdup, NULL);
dbin->requested_selection =
g_list_concat (dbin->requested_selection,
g_list_copy_deep (pending_streams, (GCopyFunc) g_strdup, NULL));
if (dbin->to_activate)
g_list_free (dbin->to_activate);
dbin->to_activate = g_list_copy (to_reassign);
}
dbin->selection_updated = TRUE;
SELECTION_UNLOCK (dbin);
if (unknown) {
GST_FIXME_OBJECT (dbin, "Got request for an unknown stream");
g_list_free (unknown);
}
if (to_activate && !slots_to_reassign) {
for (tmp = to_activate; tmp; tmp = tmp->next) {
MultiQueueSlot *slot = (MultiQueueSlot *) tmp->data;
gst_pad_add_probe (slot->src_pad, GST_PAD_PROBE_TYPE_IDLE,
(GstPadProbeCallback) idle_reconfigure, slot, NULL);
}
}
/* For all streams to deactivate, add an idle probe where we will do
* the unassignment and switch over */
for (tmp = slots_to_reassign; tmp; tmp = tmp->next) {
MultiQueueSlot *slot = (MultiQueueSlot *) tmp->data;
gst_pad_add_probe (slot->src_pad, GST_PAD_PROBE_TYPE_IDLE,
(GstPadProbeCallback) slot_unassign_probe, slot, NULL);
}
if (to_deactivate)
g_list_free (to_deactivate);
if (to_activate)
g_list_free (to_activate);
if (to_reassign)
g_list_free (to_reassign);
if (future_request_streams)
g_list_free (future_request_streams);
if (pending_streams)
g_list_free (pending_streams);
if (slots_to_reassign)
g_list_free (slots_to_reassign);
return ret;
}
static GstPadProbeReturn
ghost_pad_event_probe (GstPad * pad, GstPadProbeInfo * info,
DecodebinOutputStream * output)
{
GstPadProbeReturn ret = GST_PAD_PROBE_OK;
GstDecodebin3 *dbin = output->dbin;
GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
GST_DEBUG_OBJECT (pad, "Got event %p %s", event, GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SELECT_STREAMS:
{
GstPad *peer;
GList *streams = NULL;
guint32 seqnum = gst_event_get_seqnum (event);
SELECTION_LOCK (dbin);
if (seqnum == dbin->select_streams_seqnum) {
SELECTION_UNLOCK (dbin);
GST_DEBUG_OBJECT (pad,
"Already handled/handling that SELECT_STREAMS event");
gst_event_unref (event);
ret = GST_PAD_PROBE_HANDLED;
break;
}
dbin->select_streams_seqnum = seqnum;
if (dbin->pending_select_streams != NULL) {
GST_LOG_OBJECT (dbin, "Replacing pending select streams");
g_list_free (dbin->pending_select_streams);
dbin->pending_select_streams = NULL;
}
gst_event_parse_select_streams (event, &streams);
dbin->pending_select_streams = g_list_copy (streams);
SELECTION_UNLOCK (dbin);
/* Send event upstream */
if ((peer = gst_pad_get_peer (pad))) {
gst_pad_send_event (peer, event);
gst_object_unref (peer);
} else {
gst_event_unref (event);
}
/* Finally handle the switch */
if (streams) {
handle_stream_switch (dbin, streams, seqnum);
g_list_free_full (streams, g_free);
}
ret = GST_PAD_PROBE_HANDLED;
}
break;
default:
break;
}
return ret;
}
static gboolean
gst_decodebin3_send_event (GstElement * element, GstEvent * event)
{
GST_DEBUG_OBJECT (element, "event %s", GST_EVENT_TYPE_NAME (event));
if (GST_EVENT_TYPE (event) == GST_EVENT_SELECT_STREAMS) {
GstDecodebin3 *dbin = (GstDecodebin3 *) element;
GList *streams = NULL;
guint32 seqnum = gst_event_get_seqnum (event);
SELECTION_LOCK (dbin);
if (seqnum == dbin->select_streams_seqnum) {
SELECTION_UNLOCK (dbin);
GST_DEBUG_OBJECT (dbin,
"Already handled/handling that SELECT_STREAMS event");
return TRUE;
}
dbin->select_streams_seqnum = seqnum;
if (dbin->pending_select_streams != NULL) {
GST_LOG_OBJECT (dbin, "Replacing pending select streams");
g_list_free (dbin->pending_select_streams);
dbin->pending_select_streams = NULL;
}
gst_event_parse_select_streams (event, &streams);
dbin->pending_select_streams = g_list_copy (streams);
SELECTION_UNLOCK (dbin);
/* FIXME : We don't have an upstream ?? */
#if 0
/* Send event upstream */
if ((peer = gst_pad_get_peer (pad))) {
gst_pad_send_event (peer, event);
gst_object_unref (peer);
}
#endif
/* Finally handle the switch */
if (streams) {
handle_stream_switch (dbin, streams, seqnum);
g_list_free_full (streams, g_free);
}
gst_event_unref (event);
return TRUE;
}
return GST_ELEMENT_CLASS (parent_class)->send_event (element, event);
}
static void
free_multiqueue_slot (GstDecodebin3 * dbin, MultiQueueSlot * slot)
{
if (slot->probe_id)
gst_pad_remove_probe (slot->src_pad, slot->probe_id);
if (slot->input) {
if (slot->input->srcpad)
gst_pad_unlink (slot->input->srcpad, slot->sink_pad);
}
gst_element_release_request_pad (dbin->multiqueue, slot->sink_pad);
gst_object_replace ((GstObject **) & slot->sink_pad, NULL);
gst_object_replace ((GstObject **) & slot->src_pad, NULL);
gst_object_replace ((GstObject **) & slot->active_stream, NULL);
g_free (slot);
}
static void
free_multiqueue_slot_async (GstDecodebin3 * dbin, MultiQueueSlot * slot)
{
GST_LOG_OBJECT (dbin, "pushing multiqueue slot on thread pool to free");
gst_element_call_async (GST_ELEMENT_CAST (dbin),
(GstElementCallAsyncFunc) free_multiqueue_slot, slot, NULL);
}
/* Create a DecodebinOutputStream for a given type
* Note: It will be empty initially, it needs to be configured
* afterwards */
static DecodebinOutputStream *
create_output_stream (GstDecodebin3 * dbin, GstStreamType type)
{
DecodebinOutputStream *res = g_new0 (DecodebinOutputStream, 1);
gchar *pad_name;
const gchar *prefix;
GstStaticPadTemplate *templ;
GstPadTemplate *ptmpl;
guint32 *counter;
GstPad *internal_pad;
GST_DEBUG_OBJECT (dbin, "Created new output stream %p for type %s",
res, gst_stream_type_get_name (type));
res->type = type;
res->dbin = dbin;
if (type & GST_STREAM_TYPE_VIDEO) {
templ = &video_src_template;
counter = &dbin->vpadcount;
prefix = "video";
} else if (type & GST_STREAM_TYPE_AUDIO) {
templ = &audio_src_template;
counter = &dbin->apadcount;
prefix = "audio";
} else if (type & GST_STREAM_TYPE_TEXT) {
templ = &text_src_template;
counter = &dbin->tpadcount;
prefix = "text";
} else {
templ = &src_template;
counter = &dbin->opadcount;
prefix = "src";
}
pad_name = g_strdup_printf ("%s_%u", prefix, *counter);
*counter += 1;
ptmpl = gst_static_pad_template_get (templ);
res->src_pad = gst_ghost_pad_new_no_target_from_template (pad_name, ptmpl);
gst_object_unref (ptmpl);
g_free (pad_name);
gst_pad_set_active (res->src_pad, TRUE);
/* Put an event probe on the internal proxy pad to detect upstream
* events */
internal_pad =
(GstPad *) gst_proxy_pad_get_internal ((GstProxyPad *) res->src_pad);
gst_pad_add_probe (internal_pad, GST_PAD_PROBE_TYPE_EVENT_UPSTREAM,
(GstPadProbeCallback) ghost_pad_event_probe, res, NULL);
gst_object_unref (internal_pad);
dbin->output_streams = g_list_append (dbin->output_streams, res);
return res;
}
static void
free_output_stream (GstDecodebin3 * dbin, DecodebinOutputStream * output)
{
if (output->slot) {
if (output->decoder_sink && output->decoder)
gst_pad_unlink (output->slot->src_pad, output->decoder_sink);
output->slot->output = NULL;
output->slot = NULL;
}
gst_object_replace ((GstObject **) & output->decoder_sink, NULL);
gst_ghost_pad_set_target ((GstGhostPad *) output->src_pad, NULL);
gst_object_replace ((GstObject **) & output->decoder_src, NULL);
if (output->src_exposed) {
gst_element_remove_pad ((GstElement *) dbin, output->src_pad);
}
if (output->decoder) {
gst_element_set_locked_state (output->decoder, TRUE);
gst_element_set_state (output->decoder, GST_STATE_NULL);
gst_bin_remove ((GstBin *) dbin, output->decoder);
}
g_free (output);
}
static GstStateChangeReturn
gst_decodebin3_change_state (GstElement * element, GstStateChange transition)
{
GstDecodebin3 *dbin = (GstDecodebin3 *) element;
GstStateChangeReturn ret;
/* Upwards */
switch (transition) {
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
goto beach;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
{
GList *tmp;
/* Free output streams */
for (tmp = dbin->output_streams; tmp; tmp = tmp->next) {
DecodebinOutputStream *output = (DecodebinOutputStream *) tmp->data;
free_output_stream (dbin, output);
}
g_list_free (dbin->output_streams);
dbin->output_streams = NULL;
/* Free multiqueue slots */
for (tmp = dbin->slots; tmp; tmp = tmp->next) {
MultiQueueSlot *slot = (MultiQueueSlot *) tmp->data;
free_multiqueue_slot (dbin, slot);
}
g_list_free (dbin->slots);
dbin->slots = NULL;
dbin->current_group_id = GST_GROUP_ID_INVALID;
/* Free inputs */
}
break;
default:
break;
}
beach:
return ret;
}
gboolean
gst_decodebin3_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (decodebin3_debug, "decodebin3", 0, "decoder bin");
return gst_element_register (plugin, "decodebin3", GST_RANK_NONE,
GST_TYPE_DECODEBIN3);
}