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gstreamer/subprojects/gst-plugins-good/gst/multifile/gstsplitmuxsrc.c
Jan Schmidt 8a1fab9594 splitmuxsrc: Drop lock when unpreparing parts 
Parts may emit bus messages that want to take the splitmuxsrc
lock and prevent the downward state change. Avoid a deadlock
after a part sends an error message by taking a ref and
dropping the lock around the unprepare call

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7053>
2024-08-02 15:30:12 +10:00

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/* GStreamer Split Demuxer bin that recombines files created by
* the splitmuxsink element.
*
* Copyright (C) <2014> 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.
*/
/**
* SECTION:element-splitmuxsrc
* @title: splitmuxsrc
* @short_description: Split Demuxer bin that recombines files created by
* the splitmuxsink element.
*
* This element reads a set of input files created by the splitmuxsink element
* containing contiguous elementary streams split across multiple files.
*
* This element is similar to splitfilesrc, except that it recombines the
* streams in each file part at the demuxed elementary level, rather than
* as a single larger bytestream.
*
* ## Example pipelines
* |[
* gst-launch-1.0 splitmuxsrc location=video*.mov ! decodebin ! xvimagesink
* ]| Demux each file part and output the video stream as one continuous stream
* |[
* gst-launch-1.0 playbin uri="splitmux://path/to/foo.mp4.*"
* ]| Play back a set of files created by splitmuxsink
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstsplitmuxsrc.h"
#include "gstsplitutils.h"
#include <glib/gi18n-lib.h>
GST_DEBUG_CATEGORY (splitmux_debug);
#define GST_CAT_DEFAULT splitmux_debug
#define FIXED_TS_OFFSET (1000*GST_SECOND)
enum
{
PROP_0,
PROP_LOCATION,
PROP_NUM_OPEN_FRAGMENTS,
PROP_NUM_LOOKAHEAD
};
#define DEFAULT_OPEN_FRAGMENTS 100
#define DEFAULT_LOOKAHEAD 1
enum
{
SIGNAL_FORMAT_LOCATION,
SIGNAL_ADD_FRAGMENT,
SIGNAL_LAST
};
static guint signals[SIGNAL_LAST];
static GstStaticPadTemplate video_src_template =
GST_STATIC_PAD_TEMPLATE ("video",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate video_aux_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 subtitle_src_template =
GST_STATIC_PAD_TEMPLATE ("subtitle_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStateChangeReturn gst_splitmux_src_change_state (GstElement *
element, GstStateChange transition);
static void gst_splitmux_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_splitmux_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_splitmux_src_dispose (GObject * object);
static void gst_splitmux_src_finalize (GObject * object);
static gboolean gst_splitmux_src_start (GstSplitMuxSrc * splitmux);
static gboolean gst_splitmux_src_stop (GstSplitMuxSrc * splitmux);
static void splitmux_src_pad_constructed (GObject * pad);
static gboolean splitmux_src_pad_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean splitmux_src_pad_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static void splitmux_src_uri_handler_init (gpointer g_iface,
gpointer iface_data);
static void
gst_splitmux_part_measured_cb (GstSplitMuxPartReader * part,
const gchar * filename, GstClockTime offset, GstClockTime duration,
GstSplitMuxSrc * splitmux);
static void
gst_splitmux_part_loaded_cb (GstSplitMuxPartReader * part,
GstSplitMuxSrc * splitmux);
static GstPad *gst_splitmux_find_output_pad (GstSplitMuxPartReader * part,
GstPad * pad, GstSplitMuxSrc * splitmux);
static gboolean gst_splitmux_end_of_part (GstSplitMuxSrc * splitmux,
SplitMuxSrcPad * pad);
static gboolean gst_splitmux_check_new_caps (SplitMuxSrcPad * splitpad,
GstEvent * event);
static gboolean gst_splitmux_src_measure_next_part (GstSplitMuxSrc * splitmux);
static gboolean gst_splitmux_src_activate_part (GstSplitMuxSrc * splitmux,
guint part, GstSeekFlags extra_flags);
static gboolean gst_splitmuxsrc_add_fragment (GstSplitMuxSrc * splitmux,
const gchar * filename, GstClockTime offset, GstClockTime duration);
static void schedule_lookahead_check (GstSplitMuxSrc * src);
#define _do_init \
G_IMPLEMENT_INTERFACE(GST_TYPE_URI_HANDLER, splitmux_src_uri_handler_init); \
GST_DEBUG_CATEGORY_INIT (splitmux_debug, "splitmuxsrc", 0, "Split File Demuxing Source");
#define gst_splitmux_src_parent_class parent_class
G_DEFINE_TYPE_EXTENDED (GstSplitMuxSrc, gst_splitmux_src, GST_TYPE_BIN, 0,
_do_init);
GST_ELEMENT_REGISTER_DEFINE (splitmuxsrc, "splitmuxsrc", GST_RANK_NONE,
GST_TYPE_SPLITMUX_SRC);
static GstURIType
splitmux_src_uri_get_type (GType type)
{
return GST_URI_SRC;
}
static const gchar *const *
splitmux_src_uri_get_protocols (GType type)
{
static const gchar *protocols[] = { "splitmux", NULL };
return protocols;
}
static gchar *
splitmux_src_uri_get_uri (GstURIHandler * handler)
{
GstSplitMuxSrc *splitmux = GST_SPLITMUX_SRC (handler);
gchar *ret = NULL;
GST_OBJECT_LOCK (splitmux);
if (splitmux->location)
ret = g_strdup_printf ("splitmux://%s", splitmux->location);
GST_OBJECT_UNLOCK (splitmux);
return ret;
}
static gboolean
splitmux_src_uri_set_uri (GstURIHandler * handler, const gchar * uri,
GError ** err)
{
GstSplitMuxSrc *splitmux = GST_SPLITMUX_SRC (handler);
gchar *protocol, *location;
protocol = gst_uri_get_protocol (uri);
if (protocol == NULL || !g_str_equal (protocol, "splitmux"))
goto wrong_uri;
g_free (protocol);
location = gst_uri_get_location (uri);
GST_OBJECT_LOCK (splitmux);
g_free (splitmux->location);
splitmux->location = location;
GST_OBJECT_UNLOCK (splitmux);
return TRUE;
wrong_uri:
g_free (protocol);
GST_ELEMENT_ERROR (splitmux, RESOURCE, READ, (NULL),
("Error parsing uri %s", uri));
g_set_error_literal (err, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
"Could not parse splitmux URI");
return FALSE;
}
static void
splitmux_src_uri_handler_init (gpointer g_iface, gpointer iface_data)
{
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) (g_iface);
iface->get_type = splitmux_src_uri_get_type;
iface->get_protocols = splitmux_src_uri_get_protocols;
iface->set_uri = splitmux_src_uri_set_uri;
iface->get_uri = splitmux_src_uri_get_uri;
}
static void
gst_splitmux_src_class_init (GstSplitMuxSrcClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
gobject_class->set_property = gst_splitmux_src_set_property;
gobject_class->get_property = gst_splitmux_src_get_property;
gobject_class->dispose = gst_splitmux_src_dispose;
gobject_class->finalize = gst_splitmux_src_finalize;
gst_element_class_set_static_metadata (gstelement_class,
"Split File Demuxing Bin", "Generic/Bin/Demuxer",
"Source that reads a set of files created by splitmuxsink",
"Jan Schmidt <jan@centricular.com>");
gst_element_class_add_static_pad_template (gstelement_class,
&video_src_template);
gst_element_class_add_static_pad_template (gstelement_class,
&video_aux_src_template);
gst_element_class_add_static_pad_template (gstelement_class,
&audio_src_template);
gst_element_class_add_static_pad_template (gstelement_class,
&subtitle_src_template);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_splitmux_src_change_state);
/**
* GstSplitMuxSrc:location:
*
* File glob pattern for the input file fragments. Files that match the glob will be
* sorted and added to the set of fragments to play.
*
* This property is ignored if files are provided via the #GstSplitMuxSrc::format-location
* signal, or #GstSplitMuxSrc::add-fragment signal
*
*/
g_object_class_install_property (gobject_class, PROP_LOCATION,
g_param_spec_string ("location", "File Input Pattern",
"Glob pattern for the location of the files to read", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstSplitMuxSrc:num-open-fragments:
*
* Upper target for the number of files the splitmuxsrc will try to keep open
* simultaneously. This limits the number of file handles and threads that
* will be active.
*
* If num-open-fragments is quite small, a few more files might be open
* than requested, because of the way splitmuxsrc operates internally.
*
* Since: 1.26
*/
g_object_class_install_property (gobject_class, PROP_NUM_OPEN_FRAGMENTS,
g_param_spec_uint ("num-open-fragments", "Open files limit",
"Number of files to keep open simultaneously. "
"(0 = open all fragments at the start). "
"May still use slightly more if set to less than the number of streams in the files",
0, G_MAXUINT, DEFAULT_OPEN_FRAGMENTS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstSplitMuxSrc:num-lookahead:
*
* During playback, prepare / open the next N fragments in advance of the playback
* position.
*
* When used in conjunction with a #GstSplitMuxSrc:num-open-fragments limit,
* that closes fragments that haven't been used recently, lookahead can
* re-prepare a fragment before it is used, by opening the file and reading
* file headers and creating internal pads early.
*
* This can help when reading off very slow media by avoiding any data stall
* at fragment transitions.
*
* Since: 1.26
*/
g_object_class_install_property (gobject_class, PROP_NUM_LOOKAHEAD,
g_param_spec_uint ("num-lookahead", "Fragment Lookahead",
"When switching fragments, ensure the next N fragments are prepared. "
"Useful on slow devices if opening/preparing a new fragment can cause playback stalls",
0, G_MAXUINT, DEFAULT_LOOKAHEAD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstSplitMuxSrc:format-location:
* @splitmux: the #GstSplitMuxSrc
*
* Returns: A NULL-terminated sorted array of strings containing the
* filenames of the input files. The array will be freed internally
* using g_strfreev()
*
* Since: 1.8
*/
signals[SIGNAL_FORMAT_LOCATION] =
g_signal_new ("format-location", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_STRV, 0);
/**
* GstSplitMuxSrc::add-fragment:
* @splitmux: the #GstSplitMuxSrc
* @filename: The fragment filename to add
* @offset: Playback offset for the fragment (can be #GST_CLOCK_TIME_NONE)
* @duration: Fragment nominal duration (can be #GST_CLOCK_TIME_NONE)
*
* Add a file fragment to the set of parts. If the offset and duration are provided,
* the file will be placed in the set immediately without loading the file to measure
* it.
*
* At least one fragment must be ready and available before starting
* splitmuxsrc, either via this signal or via the #GstSplitMuxSrc:location property
* or #GstSplitMuxSrc::format-location signal.
*
* Returns: A boolean. TRUE if the fragment was successfully appended.
* FALSE on failure.
*
* Since: 1.26
*/
signals[SIGNAL_ADD_FRAGMENT] =
g_signal_new_class_handler ("add-fragment",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (gst_splitmuxsrc_add_fragment),
NULL, NULL, NULL,
G_TYPE_BOOLEAN, 3, G_TYPE_STRING | G_SIGNAL_TYPE_STATIC_SCOPE,
GST_TYPE_CLOCK_TIME, GST_TYPE_CLOCK_TIME);
}
static void
gst_splitmux_src_init (GstSplitMuxSrc * splitmux)
{
g_mutex_init (&splitmux->lock);
g_rw_lock_init (&splitmux->pads_rwlock);
splitmux->total_duration = GST_CLOCK_TIME_NONE;
gst_segment_init (&splitmux->play_segment, GST_FORMAT_TIME);
splitmux->target_max_readers = DEFAULT_OPEN_FRAGMENTS;
splitmux->num_lookahead = DEFAULT_LOOKAHEAD;
}
static void
gst_splitmux_src_dispose (GObject * object)
{
GstSplitMuxSrc *splitmux = GST_SPLITMUX_SRC (object);
GList *cur;
SPLITMUX_SRC_PADS_WLOCK (splitmux);
for (cur = g_list_first (splitmux->pads);
cur != NULL; cur = g_list_next (cur)) {
GstPad *pad = GST_PAD (cur->data);
gst_element_remove_pad (GST_ELEMENT (splitmux), pad);
}
g_list_free (splitmux->pads);
splitmux->n_pads = 0;
splitmux->pads = NULL;
SPLITMUX_SRC_PADS_WUNLOCK (splitmux);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_splitmux_src_finalize (GObject * object)
{
GstSplitMuxSrc *splitmux = GST_SPLITMUX_SRC (object);
g_mutex_clear (&splitmux->lock);
g_rw_lock_clear (&splitmux->pads_rwlock);
g_free (splitmux->location);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_splitmux_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstSplitMuxSrc *splitmux = GST_SPLITMUX_SRC (object);
switch (prop_id) {
case PROP_LOCATION:{
GST_OBJECT_LOCK (splitmux);
g_free (splitmux->location);
splitmux->location = g_value_dup_string (value);
GST_OBJECT_UNLOCK (splitmux);
break;
}
case PROP_NUM_OPEN_FRAGMENTS:
GST_OBJECT_LOCK (splitmux);
splitmux->target_max_readers = g_value_get_uint (value);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_NUM_LOOKAHEAD:
GST_OBJECT_LOCK (splitmux);
splitmux->num_lookahead = g_value_get_uint (value);
GST_OBJECT_UNLOCK (splitmux);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_splitmux_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstSplitMuxSrc *splitmux = GST_SPLITMUX_SRC (object);
switch (prop_id) {
case PROP_LOCATION:
GST_OBJECT_LOCK (splitmux);
g_value_set_string (value, splitmux->location);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_NUM_OPEN_FRAGMENTS:
GST_OBJECT_LOCK (splitmux);
g_value_set_uint (value, splitmux->target_max_readers);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_NUM_LOOKAHEAD:
GST_OBJECT_LOCK (splitmux);
g_value_set_uint (value, splitmux->num_lookahead);
GST_OBJECT_UNLOCK (splitmux);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
do_async_start (GstSplitMuxSrc * splitmux)
{
GstMessage *message;
SPLITMUX_SRC_MSG_LOCK (splitmux);
splitmux->async_pending = TRUE;
message = gst_message_new_async_start (GST_OBJECT_CAST (splitmux));
GST_BIN_CLASS (parent_class)->handle_message (GST_BIN_CAST (splitmux),
message);
SPLITMUX_SRC_MSG_UNLOCK (splitmux);
}
static void
do_async_done (GstSplitMuxSrc * splitmux)
{
GstMessage *message;
SPLITMUX_SRC_MSG_LOCK (splitmux);
if (splitmux->async_pending) {
message =
gst_message_new_async_done (GST_OBJECT_CAST (splitmux),
GST_CLOCK_TIME_NONE);
GST_BIN_CLASS (parent_class)->handle_message (GST_BIN_CAST (splitmux),
message);
splitmux->async_pending = FALSE;
}
SPLITMUX_SRC_MSG_UNLOCK (splitmux);
}
static GstStateChangeReturn
gst_splitmux_src_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstSplitMuxSrc *splitmux = (GstSplitMuxSrc *) element;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:{
break;
}
case GST_STATE_CHANGE_READY_TO_PAUSED:{
do_async_start (splitmux);
if (!gst_splitmux_src_start (splitmux)) {
do_async_done (splitmux);
return GST_STATE_CHANGE_FAILURE;
}
break;
}
case GST_STATE_CHANGE_PAUSED_TO_READY:
case GST_STATE_CHANGE_READY_TO_NULL:
/* Make sure the element will shut down */
if (!gst_splitmux_src_stop (splitmux))
return GST_STATE_CHANGE_FAILURE;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE) {
do_async_done (splitmux);
return ret;
}
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
ret = GST_STATE_CHANGE_ASYNC;
break;
default:
break;
}
return ret;
}
static void
gst_splitmux_src_activate_first_part (GstSplitMuxSrc * splitmux)
{
SPLITMUX_SRC_LOCK (splitmux);
if (splitmux->running) {
do_async_done (splitmux);
if (!gst_splitmux_src_activate_part (splitmux, 0, GST_SEEK_FLAG_NONE)) {
GST_ELEMENT_ERROR (splitmux, RESOURCE, OPEN_READ, (NULL),
("Failed to activate first part for playback"));
}
schedule_lookahead_check (splitmux);
}
SPLITMUX_SRC_UNLOCK (splitmux);
}
static void
gst_splitmux_part_measured_cb (GstSplitMuxPartReader * part,
const gchar * filename, GstClockTime offset, GstClockTime duration,
GstSplitMuxSrc * splitmux)
{
guint idx = splitmux->num_measured_parts;
gboolean need_no_more_pads;
/* signal no-more-pads as we have all pads at this point now */
SPLITMUX_SRC_LOCK (splitmux);
need_no_more_pads = !splitmux->pads_complete;
splitmux->pads_complete = TRUE;
SPLITMUX_SRC_UNLOCK (splitmux);
if (need_no_more_pads) {
GST_DEBUG_OBJECT (splitmux, "Signalling no-more-pads");
gst_element_no_more_pads (GST_ELEMENT_CAST (splitmux));
}
if (idx >= splitmux->num_parts) {
return;
}
GST_DEBUG_OBJECT (splitmux, "Measured file part %s (%u)",
splitmux->parts[idx]->path, idx);
/* Post part measured info message */
GstMessage *msg = gst_message_new_element (GST_OBJECT (splitmux),
gst_structure_new ("splitmuxsrc-fragment-info",
"fragment-id", G_TYPE_UINT, idx,
"location", G_TYPE_STRING, filename,
"fragment-offset", GST_TYPE_CLOCK_TIME, offset,
"fragment-duration", GST_TYPE_CLOCK_TIME, duration,
NULL));
gst_element_post_message (GST_ELEMENT_CAST (splitmux), msg);
/* Extend our total duration to cover this part */
GST_OBJECT_LOCK (splitmux);
splitmux->total_duration +=
gst_splitmux_part_reader_get_duration (splitmux->parts[idx]);
splitmux->play_segment.duration = splitmux->total_duration;
splitmux->end_offset =
gst_splitmux_part_reader_get_end_offset (splitmux->parts[idx]);
GST_OBJECT_UNLOCK (splitmux);
GST_DEBUG_OBJECT (splitmux,
"Duration %" GST_TIME_FORMAT ", total duration now: %" GST_TIME_FORMAT
" and end offset %" GST_TIME_FORMAT,
GST_TIME_ARGS (gst_splitmux_part_reader_get_duration (splitmux->parts
[idx])), GST_TIME_ARGS (splitmux->total_duration),
GST_TIME_ARGS (splitmux->end_offset));
SPLITMUX_SRC_LOCK (splitmux);
splitmux->num_measured_parts++;
/* If we're done or preparing the next part fails, finish here */
if (splitmux->num_measured_parts >= splitmux->num_parts
|| !gst_splitmux_src_measure_next_part (splitmux)) {
/* Store how many parts we actually prepared in the end */
splitmux->num_parts = splitmux->num_measured_parts;
if (!splitmux->did_initial_measuring) {
/* All done preparing, activate the first part if this was the initial measurement phase */
GST_INFO_OBJECT (splitmux,
"All parts measured. Total duration %" GST_TIME_FORMAT
" Activating first part", GST_TIME_ARGS (splitmux->total_duration));
gst_element_call_async (GST_ELEMENT_CAST (splitmux),
(GstElementCallAsyncFunc) gst_splitmux_src_activate_first_part,
NULL, NULL);
}
splitmux->did_initial_measuring = TRUE;
}
SPLITMUX_SRC_UNLOCK (splitmux);
}
static void
gst_splitmux_part_loaded_cb (GstSplitMuxPartReader * part,
GstSplitMuxSrc * splitmux)
{
SPLITMUX_SRC_LOCK (splitmux);
if (splitmux->did_initial_measuring) {
/* If we've already moved to playing, do another lookahead check for each fragment
* we load, to trigger loading another if needed */
schedule_lookahead_check (splitmux);
}
SPLITMUX_SRC_UNLOCK (splitmux);
}
static GstBusSyncReply
gst_splitmux_part_bus_handler (GstBus * bus, GstMessage * msg,
gpointer user_data)
{
GstSplitMuxSrc *splitmux = user_data;
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_ASYNC_DONE:{
break;
}
case GST_MESSAGE_ERROR:{
GST_ERROR_OBJECT (splitmux,
"Got error message from part %" GST_PTR_FORMAT ": %" GST_PTR_FORMAT,
GST_MESSAGE_SRC (msg), msg);
SPLITMUX_SRC_LOCK (splitmux);
if (splitmux->num_measured_parts < splitmux->num_parts) {
guint idx = splitmux->num_measured_parts;
if (idx == 0) {
GST_ERROR_OBJECT (splitmux,
"Failed to prepare first file part %s for playback",
splitmux->parts[idx]->path);
GST_ELEMENT_ERROR (splitmux, RESOURCE, OPEN_READ, (NULL),
("Failed to prepare first file part %s for playback",
splitmux->parts[idx]->path));
} else {
GST_WARNING_OBJECT (splitmux,
"Failed to prepare file part %s. Cannot play past there.",
splitmux->parts[idx]->path);
GST_ELEMENT_WARNING (splitmux, RESOURCE, READ, (NULL),
("Failed to prepare file part %s. Cannot play past there.",
splitmux->parts[idx]->path));
}
/* Store how many parts we actually prepared in the end */
splitmux->num_parts = splitmux->num_measured_parts;
if (idx > 0 && !splitmux->did_initial_measuring) {
/* All done preparing, activate the first part */
GST_INFO_OBJECT (splitmux,
"All parts prepared. Total duration %" GST_TIME_FORMAT
" Activating first part",
GST_TIME_ARGS (splitmux->total_duration));
gst_element_call_async (GST_ELEMENT_CAST (splitmux),
(GstElementCallAsyncFunc) gst_splitmux_src_activate_first_part,
NULL, NULL);
}
splitmux->did_initial_measuring = TRUE;
SPLITMUX_SRC_UNLOCK (splitmux);
do_async_done (splitmux);
} else {
SPLITMUX_SRC_UNLOCK (splitmux);
/* Need to update the message source so that it's part of the element
* hierarchy the application would expect */
msg = gst_message_copy (msg);
gst_object_replace ((GstObject **) & msg->src, (GstObject *) splitmux);
gst_element_post_message (GST_ELEMENT_CAST (splitmux), msg);
}
break;
}
default:
break;
}
return GST_BUS_PASS;
}
static GstSplitMuxPartReader *
gst_splitmux_part_reader_create (GstSplitMuxSrc * splitmux,
const char *filename, gsize index)
{
GstSplitMuxPartReader *r;
GstBus *bus;
r = g_object_new (GST_TYPE_SPLITMUX_PART_READER, NULL);
gst_splitmux_part_reader_set_callbacks (r, splitmux,
(GstSplitMuxPartReaderPadCb) gst_splitmux_find_output_pad,
(GstSplitMuxPartReaderMeasuredCb) gst_splitmux_part_measured_cb,
(GstSplitMuxPartReaderLoadedCb) gst_splitmux_part_loaded_cb);
gst_splitmux_part_reader_set_location (r, filename);
bus = gst_element_get_bus (GST_ELEMENT_CAST (r));
gst_bus_set_sync_handler (bus, gst_splitmux_part_bus_handler, splitmux, NULL);
gst_object_unref (bus);
return r;
}
static gboolean
gst_splitmux_check_new_caps (SplitMuxSrcPad * splitpad, GstEvent * event)
{
GstCaps *curcaps = gst_pad_get_current_caps ((GstPad *) (splitpad));
GstCaps *newcaps;
GstCaps *tmpcaps;
GstCaps *tmpcurcaps;
GstStructure *s;
gboolean res = TRUE;
gst_event_parse_caps (event, &newcaps);
GST_LOG_OBJECT (splitpad, "Comparing caps %" GST_PTR_FORMAT
" and %" GST_PTR_FORMAT, curcaps, newcaps);
if (curcaps == NULL)
return TRUE;
/* If caps are exactly equal exit early */
if (gst_caps_is_equal (curcaps, newcaps)) {
gst_caps_unref (curcaps);
return FALSE;
}
/* More extensive check, ignore changes in framerate, because
* demuxers get that wrong */
tmpcaps = gst_caps_copy (newcaps);
s = gst_caps_get_structure (tmpcaps, 0);
gst_structure_remove_field (s, "framerate");
tmpcurcaps = gst_caps_copy (curcaps);
gst_caps_unref (curcaps);
s = gst_caps_get_structure (tmpcurcaps, 0);
gst_structure_remove_field (s, "framerate");
/* Now check if these filtered caps are equal */
if (gst_caps_is_equal (tmpcurcaps, tmpcaps)) {
GST_INFO_OBJECT (splitpad, "Ignoring framerate-only caps change");
res = FALSE;
}
gst_caps_unref (tmpcaps);
gst_caps_unref (tmpcurcaps);
return res;
}
static void
gst_splitmux_handle_event (GstSplitMuxSrc * splitmux,
SplitMuxSrcPad * splitpad, GstPad * part_pad, GstEvent * event)
{
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_STREAM_START:{
if (splitpad->sent_stream_start)
goto drop_event;
splitpad->sent_stream_start = TRUE;
break;
}
case GST_EVENT_EOS:{
if (gst_splitmux_end_of_part (splitmux, splitpad))
// Continuing to next part, drop the EOS
goto drop_event;
if (splitmux->segment_seqnum) {
event = gst_event_make_writable (event);
gst_event_set_seqnum (event, splitmux->segment_seqnum);
}
break;
}
case GST_EVENT_SEGMENT:{
GstClockTime duration;
GstSegment seg;
gst_event_copy_segment (event, &seg);
splitpad->segment.position = seg.position;
if (splitpad->sent_segment)
goto drop_event; /* We already forwarded a segment event */
/* Calculate output segment */
GST_LOG_OBJECT (splitpad, "Pad seg %" GST_SEGMENT_FORMAT
" got seg %" GST_SEGMENT_FORMAT
" play seg %" GST_SEGMENT_FORMAT,
&splitpad->segment, &seg, &splitmux->play_segment);
/* If playing forward, take the stop time from the overall
* seg or play_segment */
if (splitmux->play_segment.rate > 0.0) {
if (splitmux->play_segment.stop != -1)
seg.stop = splitmux->play_segment.stop + FIXED_TS_OFFSET;
else
seg.stop = -1;
} else {
/* Reverse playback from stop time to start time */
/* See if an end point was requested in the seek */
if (splitmux->play_segment.start != -1) {
seg.start = splitmux->play_segment.start + FIXED_TS_OFFSET;
seg.time = splitmux->play_segment.time;
} else {
seg.start = splitpad->segment.start;
seg.time = splitpad->segment.time;
}
}
GST_OBJECT_LOCK (splitmux);
duration = splitmux->total_duration;
GST_OBJECT_UNLOCK (splitmux);
if (duration > 0)
seg.duration = duration;
else
seg.duration = GST_CLOCK_TIME_NONE;
GST_INFO_OBJECT (splitpad,
"Forwarding segment %" GST_SEGMENT_FORMAT, &seg);
gst_event_unref (event);
event = gst_event_new_segment (&seg);
if (splitmux->segment_seqnum)
gst_event_set_seqnum (event, splitmux->segment_seqnum);
splitpad->sent_segment = TRUE;
break;
}
case GST_EVENT_CAPS:{
if (!gst_splitmux_check_new_caps (splitpad, event))
goto drop_event;
splitpad->sent_caps = TRUE;
break;
}
default:
break;
}
gst_pad_push_event ((GstPad *) (splitpad), event);
return;
drop_event:
gst_event_unref (event);
return;
}
static GstFlowReturn
gst_splitmux_handle_buffer (GstSplitMuxSrc * splitmux,
SplitMuxSrcPad * splitpad, GstBuffer * buf)
{
GstFlowReturn ret;
if (splitpad->clear_next_discont) {
GST_LOG_OBJECT (splitpad, "Clearing discont flag on buffer");
GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_DISCONT);
splitpad->clear_next_discont = FALSE;
}
if (splitpad->set_next_discont) {
GST_LOG_OBJECT (splitpad, "Setting discont flag on buffer");
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
splitpad->set_next_discont = FALSE;
}
ret = gst_pad_push (GST_PAD_CAST (splitpad), buf);
GST_LOG_OBJECT (splitpad, "Pad push returned %d", ret);
return ret;
}
static guint
count_not_linked (GstSplitMuxSrc * splitmux)
{
GList *cur;
guint ret = 0;
for (cur = g_list_first (splitmux->pads);
cur != NULL; cur = g_list_next (cur)) {
SplitMuxSrcPad *splitpad = (SplitMuxSrcPad *) (cur->data);
if (GST_PAD_LAST_FLOW_RETURN (splitpad) == GST_FLOW_NOT_LINKED)
ret++;
}
return ret;
}
static void
gst_splitmux_pad_loop (GstPad * pad)
{
/* Get one event/buffer from the associated part and push */
SplitMuxSrcPad *splitpad = (SplitMuxSrcPad *) (pad);
GstSplitMuxSrc *splitmux = (GstSplitMuxSrc *) gst_pad_get_parent (pad);
GstDataQueueItem *item = NULL;
GstSplitMuxPartReader *reader = NULL;
GstPad *part_pad;
GstFlowReturn ret;
GST_OBJECT_LOCK (splitpad);
if (splitpad->part_pad == NULL) {
GST_DEBUG_OBJECT (splitmux,
"Pausing task because part reader is not present");
GST_OBJECT_UNLOCK (splitpad);
gst_pad_pause_task (pad);
gst_object_unref (splitmux);
return;
}
part_pad = gst_object_ref (splitpad->part_pad);
GST_OBJECT_UNLOCK (splitpad);
SPLITMUX_SRC_LOCK (splitmux);
reader = splitpad->reader ? gst_object_ref (splitpad->reader) : NULL;
SPLITMUX_SRC_UNLOCK (splitmux);
if (reader == NULL)
goto flushing;
GST_LOG_OBJECT (splitpad, "Popping data queue item from %" GST_PTR_FORMAT
" pad %" GST_PTR_FORMAT, reader, part_pad);
ret = gst_splitmux_part_reader_pop (reader, part_pad, &item);
if (ret == GST_FLOW_ERROR)
goto error;
if (ret == GST_FLOW_FLUSHING || item == NULL)
goto flushing;
GST_DEBUG_OBJECT (splitpad, "Got data queue item %" GST_PTR_FORMAT,
item->object);
if (GST_IS_EVENT (item->object)) {
GstEvent *event = (GstEvent *) (item->object);
gst_splitmux_handle_event (splitmux, splitpad, part_pad, event);
} else {
GstBuffer *buf = (GstBuffer *) (item->object);
GstFlowReturn ret = gst_splitmux_handle_buffer (splitmux, splitpad, buf);
if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_EOS)) {
/* Stop immediately on error or flushing */
GST_INFO_OBJECT (splitpad, "Stopping due to pad_push() result %d", ret);
gst_pad_pause_task (pad);
if (ret < GST_FLOW_EOS) {
GST_ELEMENT_FLOW_ERROR (splitmux, ret);
} else if (ret == GST_FLOW_NOT_LINKED) {
gboolean post_error;
guint n_notlinked;
/* Only post not-linked if all pads are not-linked */
SPLITMUX_SRC_PADS_RLOCK (splitmux);
n_notlinked = count_not_linked (splitmux);
post_error = (splitmux->pads_complete
&& n_notlinked == splitmux->n_pads);
SPLITMUX_SRC_PADS_RUNLOCK (splitmux);
if (post_error)
GST_ELEMENT_FLOW_ERROR (splitmux, ret);
}
}
}
g_free (item);
gst_object_unref (reader);
gst_object_unref (part_pad);
gst_object_unref (splitmux);
return;
error:
/* Fall through */
GST_ELEMENT_ERROR (splitmux, RESOURCE, OPEN_READ, (NULL),
("Error reading part file %s", GST_STR_NULL (reader->path)));
flushing:
gst_pad_pause_task (pad);
if (reader != NULL)
gst_object_unref (reader);
gst_object_unref (part_pad);
gst_object_unref (splitmux);
return;
}
static void
reduce_active_readers (GstSplitMuxSrc * splitmux)
{
/* Try and reduce the active reader count by deactivating the
* oldest reader if it's no longer in use */
if (splitmux->target_max_readers == 0) {
return;
}
while (g_queue_get_length (splitmux->active_parts) >=
splitmux->target_max_readers) {
GstSplitMuxPartReader *oldest_reader =
g_queue_peek_head (splitmux->active_parts);
if (gst_splitmux_part_reader_is_playing (oldest_reader)) {
/* This part is still playing on some pad(s). Keep it active */
return;
}
GST_DEBUG_OBJECT (splitmux, "Stopping least recently used part %s",
oldest_reader->path);
oldest_reader = g_queue_pop_head (splitmux->active_parts);
gst_splitmux_part_reader_stop (oldest_reader);
g_object_unref (oldest_reader);
}
}
static void
add_to_active_readers (GstSplitMuxSrc * splitmux,
GstSplitMuxPartReader * reader, gboolean add_as_oldest)
{
if (splitmux->target_max_readers != 0) {
/* Check if it's already in the active reader pool, and move this reader
* to the tail, or else add a ref and push it on the tail */
if (gst_splitmux_part_reader_is_loaded (reader)) {
/* Already in the queue, and reffed, move it to the end without
* adding another ref */
gboolean in_queue = g_queue_remove (splitmux->active_parts, reader);
g_assert (in_queue == TRUE);
} else {
/* Putting it in the queue. Add a ref */
g_object_ref (reader);
/* When adding a new reader to the list, reduce active readers first */
reduce_active_readers (splitmux);
}
if (add_as_oldest) {
g_queue_push_head (splitmux->active_parts, reader);
} else {
g_queue_push_tail (splitmux->active_parts, reader);
}
}
}
/* Called with splitmuxsrc lock held */
static gboolean
gst_splitmux_src_activate_part (GstSplitMuxSrc * splitmux, guint part,
GstSeekFlags extra_flags)
{
GST_DEBUG_OBJECT (splitmux, "Activating part %d", part);
GstSplitMuxPartReader *reader = gst_object_ref (splitmux->parts[part]);
splitmux->cur_part = part;
add_to_active_readers (splitmux, reader, FALSE);
SPLITMUX_SRC_UNLOCK (splitmux);
/* Drop lock around calling activate, as it might call back
* into the splitmuxsrc when exposing pads */
if (!gst_splitmux_part_reader_activate (reader,
&splitmux->play_segment, extra_flags)) {
gst_object_unref (reader);
/* Re-take the lock before exiting */
SPLITMUX_SRC_LOCK (splitmux);
return FALSE;
}
gst_object_unref (reader);
SPLITMUX_SRC_LOCK (splitmux);
SPLITMUX_SRC_PADS_RLOCK (splitmux);
GList *cur;
for (cur = g_list_first (splitmux->pads);
cur != NULL; cur = g_list_next (cur)) {
SplitMuxSrcPad *splitpad = (SplitMuxSrcPad *) (cur->data);
GST_OBJECT_LOCK (splitpad);
splitpad->cur_part = part;
splitpad->reader = splitmux->parts[splitpad->cur_part];
if (splitpad->part_pad)
gst_object_unref (splitpad->part_pad);
splitpad->part_pad =
gst_splitmux_part_reader_lookup_pad (splitpad->reader,
(GstPad *) (splitpad));
GST_OBJECT_UNLOCK (splitpad);
/* Make sure we start with a DISCONT */
splitpad->set_next_discont = TRUE;
splitpad->clear_next_discont = FALSE;
gst_pad_start_task (GST_PAD (splitpad),
(GstTaskFunction) gst_splitmux_pad_loop, splitpad, NULL);
}
SPLITMUX_SRC_PADS_RUNLOCK (splitmux);
return TRUE;
}
static gboolean
gst_splitmux_src_measure_next_part (GstSplitMuxSrc * splitmux)
{
guint idx = splitmux->num_measured_parts;
g_assert (idx < splitmux->num_parts);
GstClockTime end_offset = 0;
/* Take the end offset of the most recently measured part */
if (splitmux->num_measured_parts > 0) {
GstSplitMuxPartReader *reader =
splitmux->parts[splitmux->num_measured_parts - 1];
end_offset = gst_splitmux_part_reader_get_end_offset (reader);
}
for (guint idx = splitmux->num_measured_parts; idx < splitmux->num_parts;
idx++) {
/* Walk forward until we find a part that needs measuring */
GstSplitMuxPartReader *reader = splitmux->parts[idx];
GstClockTime start_offset =
gst_splitmux_part_reader_get_start_offset (reader);
if (start_offset == GST_CLOCK_TIME_NONE) {
GST_DEBUG_OBJECT (splitmux,
"Setting start offset for file part %s (%u) to %" GST_TIMEP_FORMAT,
reader->path, idx, &end_offset);
gst_splitmux_part_reader_set_start_offset (reader, end_offset,
FIXED_TS_OFFSET);
}
if (gst_splitmux_part_reader_needs_measuring (reader)) {
GST_DEBUG_OBJECT (splitmux, "Measuring file part %s (%u)",
reader->path, idx);
add_to_active_readers (splitmux, reader, TRUE);
SPLITMUX_SRC_UNLOCK (splitmux);
if (!gst_splitmux_part_reader_prepare (reader)) {
GST_WARNING_OBJECT (splitmux,
"Failed to prepare file part %s. Cannot play past there.",
reader->path);
GST_ELEMENT_WARNING (splitmux, RESOURCE, READ, (NULL),
("Failed to prepare file part %s. Cannot play past there.",
reader->path));
gst_splitmux_part_reader_unprepare (reader);
g_object_unref (reader);
SPLITMUX_SRC_LOCK (splitmux);
splitmux->parts[idx] = NULL;
splitmux->num_measured_parts = idx;
return FALSE;
}
SPLITMUX_SRC_LOCK (splitmux);
return TRUE;
}
GST_OBJECT_LOCK (splitmux);
/* Get the end offset (start offset of the next piece) */
end_offset = gst_splitmux_part_reader_get_end_offset (reader);
splitmux->total_duration += gst_splitmux_part_reader_get_duration (reader);
splitmux->num_measured_parts++;
GST_OBJECT_UNLOCK (splitmux);
}
return TRUE;
}
static gboolean
gst_splitmux_src_start (GstSplitMuxSrc * splitmux)
{
gboolean ret = FALSE;
GError *err = NULL;
gchar *basename = NULL;
gchar *dirname = NULL;
gchar **files = NULL;
guint i;
SPLITMUX_SRC_LOCK (splitmux);
if (splitmux->running) {
/* splitmux is still running / stopping. We can't start again yet */
SPLITMUX_SRC_UNLOCK (splitmux);
return FALSE;
}
GST_DEBUG_OBJECT (splitmux, "Starting");
splitmux->active_parts = g_queue_new ();
if (splitmux->num_parts == 0) {
/* No parts were added via add-fragment signal, try via
* format-location signal and location property glob */
g_signal_emit (splitmux, signals[SIGNAL_FORMAT_LOCATION], 0, &files);
if (files == NULL || *files == NULL) {
GST_OBJECT_LOCK (splitmux);
if (splitmux->location != NULL && splitmux->location[0] != '\0') {
basename = g_path_get_basename (splitmux->location);
dirname = g_path_get_dirname (splitmux->location);
}
GST_OBJECT_UNLOCK (splitmux);
g_strfreev (files);
files = gst_split_util_find_files (dirname, basename, &err);
if (files == NULL || *files == NULL) {
SPLITMUX_SRC_UNLOCK (splitmux);
goto no_files;
}
}
}
splitmux->pads_complete = FALSE;
splitmux->running = TRUE;
if (files != NULL) {
g_assert (splitmux->parts == NULL);
splitmux->num_parts_alloced = g_strv_length (files);
splitmux->parts =
g_new0 (GstSplitMuxPartReader *, splitmux->num_parts_alloced);
/* Create all part pipelines */
for (i = 0; i < splitmux->num_parts_alloced; i++) {
splitmux->parts[i] =
gst_splitmux_part_reader_create (splitmux, files[i], i);
if (splitmux->parts[i] == NULL)
break;
}
/* Store how many parts we actually created */
splitmux->num_parts = i;
}
splitmux->num_measured_parts = 0;
/* Update total_duration state variable */
GST_OBJECT_LOCK (splitmux);
splitmux->total_duration = 0;
splitmux->end_offset = 0;
GST_OBJECT_UNLOCK (splitmux);
/* Ensure all the parts we have are measured.
* Start the first: it will asynchronously go to PAUSED
* or error out and then we can proceed with the next one
*/
if (!gst_splitmux_src_measure_next_part (splitmux) || splitmux->num_parts < 1) {
SPLITMUX_SRC_UNLOCK (splitmux);
goto failed_part;
}
if (splitmux->num_measured_parts >= splitmux->num_parts) {
/* Nothing needed measuring, activate the first part */
GST_INFO_OBJECT (splitmux,
"All parts measured. Total duration %" GST_TIME_FORMAT
" Activating first part", GST_TIME_ARGS (splitmux->total_duration));
gst_element_call_async (GST_ELEMENT_CAST (splitmux),
(GstElementCallAsyncFunc) gst_splitmux_src_activate_first_part,
NULL, NULL);
splitmux->did_initial_measuring = TRUE;
}
SPLITMUX_SRC_UNLOCK (splitmux);
/* All good now: we have to wait for all parts to be asynchronously
* prepared to know the total duration we can play */
ret = TRUE;
done:
if (err != NULL)
g_error_free (err);
g_strfreev (files);
g_free (basename);
g_free (dirname);
return ret;
/* ERRORS */
no_files:
{
GST_ELEMENT_ERROR (splitmux, RESOURCE, OPEN_READ, ("%s", err->message),
("Failed to find files in '%s' for pattern '%s'",
GST_STR_NULL (dirname), GST_STR_NULL (basename)));
goto done;
}
failed_part:
{
GST_ELEMENT_ERROR (splitmux, RESOURCE, OPEN_READ, (NULL),
("Failed to open any files for reading"));
goto done;
}
}
static gboolean
gst_splitmux_src_stop (GstSplitMuxSrc * splitmux)
{
gboolean ret = TRUE;
guint i;
GList *cur, *pads_list;
SPLITMUX_SRC_LOCK (splitmux);
if (!splitmux->running)
goto out;
splitmux->running = FALSE;
GST_DEBUG_OBJECT (splitmux, "Stopping");
/* Stop all part readers. */
for (i = 0; i < splitmux->num_parts; i++) {
if (splitmux->parts[i] == NULL)
continue;
/* Take a ref so we can drop the lock around calling unprepare */
GstSplitMuxPartReader *part = g_object_ref (splitmux->parts[i]);
SPLITMUX_SRC_UNLOCK (splitmux);
gst_splitmux_part_reader_unprepare (part);
g_object_unref (part);
SPLITMUX_SRC_LOCK (splitmux);
}
SPLITMUX_SRC_PADS_WLOCK (splitmux);
pads_list = splitmux->pads;
splitmux->pads = NULL;
SPLITMUX_SRC_PADS_WUNLOCK (splitmux);
SPLITMUX_SRC_UNLOCK (splitmux);
for (cur = g_list_first (pads_list); cur != NULL; cur = g_list_next (cur)) {
SplitMuxSrcPad *tmp = (SplitMuxSrcPad *) (cur->data);
gst_pad_stop_task (GST_PAD (tmp));
gst_element_remove_pad (GST_ELEMENT (splitmux), GST_PAD (tmp));
}
g_list_free (pads_list);
SPLITMUX_SRC_LOCK (splitmux);
/* Now the pad task is stopped we can destroy the readers */
g_queue_free_full (splitmux->active_parts, g_object_unref);
for (i = 0; i < splitmux->num_parts; i++) {
if (splitmux->parts[i] == NULL)
continue;
g_object_unref (splitmux->parts[i]);
splitmux->parts[i] = NULL;
}
g_free (splitmux->parts);
splitmux->parts = NULL;
splitmux->num_parts = 0;
splitmux->num_measured_parts = 0;
splitmux->did_initial_measuring = FALSE;
splitmux->num_parts_alloced = 0;
splitmux->total_duration = GST_CLOCK_TIME_NONE;
/* Reset playback segment */
gst_segment_init (&splitmux->play_segment, GST_FORMAT_TIME);
out:
SPLITMUX_SRC_UNLOCK (splitmux);
return ret;
}
typedef struct
{
GstSplitMuxSrc *splitmux;
SplitMuxSrcPad *splitpad;
} SplitMuxAndPad;
static gboolean
handle_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data)
{
SplitMuxAndPad *splitmux_and_pad;
GstSplitMuxSrc *splitmux;
SplitMuxSrcPad *splitpad;
splitmux_and_pad = user_data;
splitmux = splitmux_and_pad->splitmux;
splitpad = splitmux_and_pad->splitpad;
GST_DEBUG_OBJECT (splitpad, "handle sticky event %" GST_PTR_FORMAT, *event);
gst_event_ref (*event);
gst_splitmux_handle_event (splitmux, splitpad, pad, *event);
return TRUE;
}
static GstPad *
gst_splitmux_find_output_pad (GstSplitMuxPartReader * part, GstPad * pad,
GstSplitMuxSrc * splitmux)
{
GList *cur;
gchar *pad_name = gst_pad_get_name (pad);
GstPad *target = NULL;
gboolean is_new_pad = FALSE;
SPLITMUX_SRC_PADS_WLOCK (splitmux);
for (cur = g_list_first (splitmux->pads);
cur != NULL; cur = g_list_next (cur)) {
GstPad *tmp = (GstPad *) (cur->data);
if (g_str_equal (GST_PAD_NAME (tmp), pad_name)) {
target = tmp;
break;
}
}
if (target == NULL && !splitmux->pads_complete) {
SplitMuxAndPad splitmux_and_pad;
/* No pad found, create one */
target = g_object_new (SPLITMUX_TYPE_SRC_PAD,
"name", pad_name, "direction", GST_PAD_SRC, NULL);
splitmux->pads = g_list_prepend (splitmux->pads, target);
splitmux->n_pads++;
gst_pad_set_active (target, TRUE);
splitmux_and_pad.splitmux = splitmux;
splitmux_and_pad.splitpad = (SplitMuxSrcPad *) target;
gst_pad_sticky_events_foreach (pad, handle_sticky_events,
&splitmux_and_pad);
is_new_pad = TRUE;
}
SPLITMUX_SRC_PADS_WUNLOCK (splitmux);
g_free (pad_name);
if (target == NULL)
goto pad_not_found;
if (is_new_pad)
gst_element_add_pad (GST_ELEMENT_CAST (splitmux), target);
return target;
pad_not_found:
GST_ELEMENT_ERROR (splitmux, STREAM, FAILED, (NULL),
("Stream part %s contains extra unknown pad %" GST_PTR_FORMAT,
part->path, pad));
return NULL;
}
static void
gst_splitmux_push_event (GstSplitMuxSrc * splitmux, GstEvent * e,
guint32 seqnum)
{
GList *cur;
if (seqnum) {
e = gst_event_make_writable (e);
gst_event_set_seqnum (e, seqnum);
}
SPLITMUX_SRC_PADS_RLOCK (splitmux);
for (cur = g_list_first (splitmux->pads);
cur != NULL; cur = g_list_next (cur)) {
GstPad *pad = GST_PAD_CAST (cur->data);
gst_event_ref (e);
gst_pad_push_event (pad, e);
}
SPLITMUX_SRC_PADS_RUNLOCK (splitmux);
gst_event_unref (e);
}
static void
gst_splitmux_push_flush_stop (GstSplitMuxSrc * splitmux, guint32 seqnum)
{
GstEvent *e = gst_event_new_flush_stop (TRUE);
GList *cur;
if (seqnum) {
e = gst_event_make_writable (e);
gst_event_set_seqnum (e, seqnum);
}
SPLITMUX_SRC_PADS_RLOCK (splitmux);
for (cur = g_list_first (splitmux->pads);
cur != NULL; cur = g_list_next (cur)) {
SplitMuxSrcPad *target = (SplitMuxSrcPad *) (cur->data);
gst_event_ref (e);
gst_pad_push_event (GST_PAD_CAST (target), e);
target->sent_caps = FALSE;
target->sent_stream_start = FALSE;
target->sent_segment = FALSE;
}
SPLITMUX_SRC_PADS_RUNLOCK (splitmux);
gst_event_unref (e);
}
/* Callback for when a part finishes and we need to move to the next */
static gboolean
gst_splitmux_end_of_part (GstSplitMuxSrc * splitmux, SplitMuxSrcPad * splitpad)
{
gint next_part = -1;
gint cur_part = splitpad->cur_part;
gboolean res = FALSE;
if (splitmux->play_segment.rate >= 0.0) {
if (cur_part + 1 < splitmux->num_parts)
next_part = cur_part + 1;
/* Make sure the transition is seamless */
splitpad->set_next_discont = FALSE;
splitpad->clear_next_discont = TRUE;
} else {
/* Reverse play - move to previous segment */
if (cur_part > 0) {
next_part = cur_part - 1;
/* Non-seamless transition in reverse */
splitpad->set_next_discont = TRUE;
splitpad->clear_next_discont = FALSE;
}
}
SPLITMUX_SRC_LOCK (splitmux);
/* If all pads are done with this part, deactivate it */
if (gst_splitmux_part_is_eos (splitmux->parts[splitpad->cur_part])) {
GST_DEBUG_OBJECT (splitmux, "All pads in part %d finished. Deactivating it",
cur_part);
gst_splitmux_part_reader_deactivate (splitmux->parts[cur_part]);
}
if (splitmux->play_segment.rate >= 0.0) {
if (splitmux->play_segment.stop != -1) {
GstClockTime part_end =
gst_splitmux_part_reader_get_end_offset (splitmux->parts[cur_part]);
if (part_end >= splitmux->play_segment.stop) {
GST_DEBUG_OBJECT (splitmux,
"Stop position was within that part. Finishing");
next_part = -1;
}
}
} else {
if (splitmux->play_segment.start != -1) {
GstClockTime part_start =
gst_splitmux_part_reader_get_start_offset (splitmux->parts[cur_part]);
if (part_start <= splitmux->play_segment.start) {
GST_DEBUG_OBJECT (splitmux,
"Start position %" GST_TIME_FORMAT
" was within that part. Finishing",
GST_TIME_ARGS (splitmux->play_segment.start));
next_part = -1;
}
}
}
if (next_part != -1) {
GST_DEBUG_OBJECT (splitmux, "At EOS on pad %" GST_PTR_FORMAT
" moving to part %d", splitpad, next_part);
splitpad->cur_part = next_part;
splitpad->reader = splitmux->parts[splitpad->cur_part];
if (splitmux->cur_part != next_part) {
if (!gst_splitmux_part_reader_is_playing (splitpad->reader)) {
GstSegment tmp;
/* If moving backward into a new part, set stop
* to -1 to ensure we play the entire file - workaround
* a bug in qtdemux that misses bits at the end */
gst_segment_copy_into (&splitmux->play_segment, &tmp);
if (tmp.rate < 0)
tmp.stop = -1;
/* This is the first pad to move to the new part, activate it */
GST_DEBUG_OBJECT (splitpad,
"First pad to change part. Activating part %d with seg %"
GST_SEGMENT_FORMAT, next_part, &tmp);
add_to_active_readers (splitmux, splitpad->reader, FALSE);
if (!gst_splitmux_part_reader_activate (splitpad->reader, &tmp,
GST_SEEK_FLAG_NONE)) {
goto error;
}
}
splitmux->cur_part = next_part;
schedule_lookahead_check (splitmux);
}
if (splitpad->part_pad)
gst_object_unref (splitpad->part_pad);
splitpad->part_pad =
gst_splitmux_part_reader_lookup_pad (splitpad->reader,
(GstPad *) (splitpad));
res = TRUE;
}
SPLITMUX_SRC_UNLOCK (splitmux);
return res;
error:
SPLITMUX_SRC_UNLOCK (splitmux);
GST_ELEMENT_ERROR (splitmux, RESOURCE, READ, (NULL),
("Failed to activate part %d", splitmux->cur_part));
return FALSE;
}
G_DEFINE_TYPE (SplitMuxSrcPad, splitmux_src_pad, GST_TYPE_PAD);
static void
splitmux_src_pad_constructed (GObject * pad)
{
gst_pad_set_event_function (GST_PAD (pad),
GST_DEBUG_FUNCPTR (splitmux_src_pad_event));
gst_pad_set_query_function (GST_PAD (pad),
GST_DEBUG_FUNCPTR (splitmux_src_pad_query));
G_OBJECT_CLASS (splitmux_src_pad_parent_class)->constructed (pad);
}
static void
gst_splitmux_src_pad_dispose (GObject * object)
{
SplitMuxSrcPad *pad = (SplitMuxSrcPad *) (object);
GST_OBJECT_LOCK (pad);
if (pad->part_pad) {
gst_object_unref (pad->part_pad);
pad->part_pad = NULL;
}
GST_OBJECT_UNLOCK (pad);
G_OBJECT_CLASS (splitmux_src_pad_parent_class)->dispose (object);
}
static void
splitmux_src_pad_class_init (SplitMuxSrcPadClass * klass)
{
GObjectClass *gobject_klass = (GObjectClass *) (klass);
gobject_klass->constructed = splitmux_src_pad_constructed;
gobject_klass->dispose = gst_splitmux_src_pad_dispose;
}
static void
splitmux_src_pad_init (SplitMuxSrcPad * pad)
{
}
/* Event handler for source pads. Proxy events into the child
* parts as needed
*/
static gboolean
splitmux_src_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstSplitMuxSrc *splitmux = GST_SPLITMUX_SRC (parent);
gboolean ret = FALSE;
GST_DEBUG_OBJECT (parent, "event %" GST_PTR_FORMAT
" on %" GST_PTR_FORMAT, event, pad);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:{
GstFormat format;
gdouble rate;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
guint32 seqnum;
gint i;
GstClockTime part_start, position;
GList *cur;
GstSegment tmp;
gst_event_parse_seek (event, &rate, &format, &flags,
&start_type, &start, &stop_type, &stop);
if (format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (splitmux, "can only seek on TIME");
goto error;
}
/* FIXME: Support non-flushing seeks, which might never wake up */
if (!(flags & GST_SEEK_FLAG_FLUSH)) {
GST_DEBUG_OBJECT (splitmux, "Only flushing seeks supported");
goto error;
}
seqnum = gst_event_get_seqnum (event);
SPLITMUX_SRC_LOCK (splitmux);
if (!splitmux->running || splitmux->num_parts < 1) {
/* Not started yet */
SPLITMUX_SRC_UNLOCK (splitmux);
goto error;
}
if (splitmux->segment_seqnum == seqnum) {
GST_DEBUG_OBJECT (splitmux, "Ignoring duplicate seek event");
SPLITMUX_SRC_UNLOCK (splitmux);
ret = TRUE;
goto done;
}
gst_segment_copy_into (&splitmux->play_segment, &tmp);
if (!gst_segment_do_seek (&tmp, rate,
format, flags, start_type, start, stop_type, stop, NULL)) {
/* Invalid seek requested, ignore it */
SPLITMUX_SRC_UNLOCK (splitmux);
goto error;
}
position = tmp.position;
GST_DEBUG_OBJECT (splitmux, "Performing seek with seg %"
GST_SEGMENT_FORMAT, &tmp);
GST_DEBUG_OBJECT (splitmux,
"Handling flushing seek. Sending flush start");
/* Send flush_start */
gst_splitmux_push_event (splitmux, gst_event_new_flush_start (), seqnum);
/* Stop all parts, which will work because of the flush */
SPLITMUX_SRC_PADS_RLOCK (splitmux);
SPLITMUX_SRC_UNLOCK (splitmux);
for (cur = g_list_first (splitmux->pads);
cur != NULL; cur = g_list_next (cur)) {
SplitMuxSrcPad *target = (SplitMuxSrcPad *) (cur->data);
GstSplitMuxPartReader *reader = splitmux->parts[target->cur_part];
gst_splitmux_part_reader_deactivate (reader);
}
/* Shut down pad tasks */
GST_DEBUG_OBJECT (splitmux, "Pausing pad tasks");
for (cur = g_list_first (splitmux->pads);
cur != NULL; cur = g_list_next (cur)) {
GstPad *splitpad = (GstPad *) (cur->data);
gst_pad_pause_task (GST_PAD (splitpad));
}
SPLITMUX_SRC_PADS_RUNLOCK (splitmux);
SPLITMUX_SRC_LOCK (splitmux);
/* Send flush stop */
GST_DEBUG_OBJECT (splitmux, "Sending flush stop");
gst_splitmux_push_flush_stop (splitmux, seqnum);
/* Everything is stopped, so update the play_segment */
gst_segment_copy_into (&tmp, &splitmux->play_segment);
splitmux->segment_seqnum = seqnum;
/* Work out where to start from now */
for (i = 0; i < splitmux->num_parts - 1; i++) {
GstSplitMuxPartReader *reader = splitmux->parts[i + 1];
GstClockTime part_start =
gst_splitmux_part_reader_get_start_offset (reader);
GST_LOG_OBJECT (splitmux, "Part %d has start offset %" GST_TIMEP_FORMAT
" (want position %" GST_TIMEP_FORMAT ")", i, &part_start,
&position);
if (position < part_start)
break;
}
if (i == splitmux->num_parts)
i = splitmux->num_parts - 1;
part_start =
gst_splitmux_part_reader_get_start_offset (splitmux->parts[i]);
GST_DEBUG_OBJECT (splitmux,
"Seek to time %" GST_TIME_FORMAT " landed in part %d offset %"
GST_TIME_FORMAT, GST_TIME_ARGS (position),
i, GST_TIME_ARGS (position - part_start));
ret = gst_splitmux_src_activate_part (splitmux, i, flags);
SPLITMUX_SRC_UNLOCK (splitmux);
}
case GST_EVENT_RECONFIGURE:{
GST_DEBUG_OBJECT (splitmux, "reconfigure event on pad %" GST_PTR_FORMAT,
pad);
SPLITMUX_SRC_PADS_RLOCK (splitmux);
/* Restart the task on this pad */
gst_pad_start_task (GST_PAD (pad),
(GstTaskFunction) gst_splitmux_pad_loop, pad, NULL);
SPLITMUX_SRC_PADS_RUNLOCK (splitmux);
break;
}
default:
break;
}
done:
gst_event_unref (event);
error:
return ret;
}
static gboolean
splitmux_src_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
/* Query handler for source pads. Proxy queries into the child
* parts as needed
*/
GstSplitMuxSrc *splitmux = GST_SPLITMUX_SRC (parent);
gboolean ret = FALSE;
GST_LOG_OBJECT (parent, "query %" GST_PTR_FORMAT
" on %" GST_PTR_FORMAT, query, pad);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
case GST_QUERY_POSITION:
case GST_QUERY_LATENCY:{
GstSplitMuxPartReader *part;
SplitMuxSrcPad *anypad;
SPLITMUX_SRC_LOCK (splitmux);
SPLITMUX_SRC_PADS_RLOCK (splitmux);
anypad = (SplitMuxSrcPad *) (splitmux->pads->data);
part = splitmux->parts[anypad->cur_part];
ret = gst_splitmux_part_reader_src_query (part, pad, query);
SPLITMUX_SRC_PADS_RUNLOCK (splitmux);
SPLITMUX_SRC_UNLOCK (splitmux);
break;
}
case GST_QUERY_DURATION:{
GstClockTime duration;
GstFormat fmt;
gst_query_parse_duration (query, &fmt, NULL);
if (fmt != GST_FORMAT_TIME)
break;
GST_OBJECT_LOCK (splitmux);
duration = splitmux->total_duration;
GST_OBJECT_UNLOCK (splitmux);
if (duration > 0 && duration != GST_CLOCK_TIME_NONE) {
gst_query_set_duration (query, GST_FORMAT_TIME, duration);
ret = TRUE;
}
break;
}
case GST_QUERY_SEEKING:{
GstFormat format;
gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
if (format != GST_FORMAT_TIME)
break;
GST_OBJECT_LOCK (splitmux);
gst_query_set_seeking (query, GST_FORMAT_TIME, TRUE, 0,
splitmux->total_duration);
ret = TRUE;
GST_OBJECT_UNLOCK (splitmux);
break;
}
case GST_QUERY_SEGMENT:{
GstFormat format;
gint64 start, stop;
SPLITMUX_SRC_LOCK (splitmux);
format = splitmux->play_segment.format;
start =
gst_segment_to_stream_time (&splitmux->play_segment, format,
splitmux->play_segment.start);
if (splitmux->play_segment.stop == GST_CLOCK_TIME_NONE) {
if (splitmux->play_segment.duration == GST_CLOCK_TIME_NONE)
stop = GST_CLOCK_TIME_NONE;
else
stop = start + splitmux->play_segment.duration;
} else {
stop = gst_segment_to_stream_time (&splitmux->play_segment, format,
splitmux->play_segment.stop);
}
gst_query_set_segment (query, splitmux->play_segment.rate, format, start,
stop);
ret = TRUE;
SPLITMUX_SRC_UNLOCK (splitmux);
}
default:
break;
}
return ret;
}
static gboolean
gst_splitmuxsrc_add_fragment (GstSplitMuxSrc * splitmux,
const gchar * filename, GstClockTime offset, GstClockTime duration)
{
SPLITMUX_SRC_LOCK (splitmux);
/* Ensure we have enough space in the parts array, reallocating if necessary */
if (splitmux->num_parts == splitmux->num_parts_alloced) {
gsize to_alloc = splitmux->num_parts_alloced;
to_alloc = MAX (to_alloc + 8, 3 * to_alloc / 2);
splitmux->parts =
g_renew (GstSplitMuxPartReader *, splitmux->parts, to_alloc);
/* Zero newly allocated memory */
for (gsize i = splitmux->num_parts_alloced; i < to_alloc; i++) {
splitmux->parts[i] = NULL;
}
splitmux->num_parts_alloced = to_alloc;
}
GstSplitMuxPartReader *reader =
gst_splitmux_part_reader_create (splitmux, filename, splitmux->num_parts);
if (GST_CLOCK_TIME_IS_VALID (offset)) {
gst_splitmux_part_reader_set_start_offset (reader, offset, FIXED_TS_OFFSET);
}
if (GST_CLOCK_TIME_IS_VALID (duration)) {
gst_splitmux_part_reader_set_duration (reader, duration);
}
splitmux->parts[splitmux->num_parts] = reader;
splitmux->num_parts++;
/* If we already did the initial measuring, and we added a new first part here,
* call 'measure_next_part' to get it measured / added to our duration */
if (splitmux->did_initial_measuring
&& (splitmux->num_measured_parts + 1) == splitmux->num_parts) {
if (!gst_splitmux_src_measure_next_part (splitmux)) {
}
}
SPLITMUX_SRC_UNLOCK (splitmux);
return TRUE;
}
static void
do_lookahead_check (GstSplitMuxSrc * splitmux)
{
SPLITMUX_SRC_LOCK (splitmux);
splitmux->lookahead_check_pending = FALSE;
if (!splitmux->running) {
goto done;
}
GST_OBJECT_LOCK (splitmux);
guint lookahead = splitmux->num_lookahead;
GST_OBJECT_UNLOCK (splitmux);
if (splitmux->target_max_readers != 0 &&
splitmux->target_max_readers <= lookahead) {
/* Don't let lookahead activate more readers than the target */
lookahead = splitmux->target_max_readers - 1;
}
if (lookahead == 0) {
goto done;
}
if (splitmux->play_segment.rate > 0.0) {
/* Walk forward */
guint i;
gsize limit = splitmux->cur_part + lookahead;
if (limit >= splitmux->num_parts) {
/* Don't check past the end */
limit = splitmux->num_parts - 1;
}
for (i = splitmux->cur_part + 1; i <= limit; i++) {
GstSplitMuxPartReader *reader = splitmux->parts[i];
if (!gst_splitmux_part_reader_is_loaded (reader)) {
GST_DEBUG_OBJECT (splitmux,
"Loading part %u reader %" GST_PTR_FORMAT " for lookahead (cur %u)",
i, reader, splitmux->cur_part);
gst_object_ref (reader);
add_to_active_readers (splitmux, reader, FALSE);
/* Drop lock before calling activate, as it might call back
* into the splitmuxsrc when exposing pads */
SPLITMUX_SRC_UNLOCK (splitmux);
gst_splitmux_part_reader_prepare (reader);
gst_object_unref (reader);
/* Only prepare one part at a time */
return;
}
/* Already active, but promote it in the LRU list */
add_to_active_readers (splitmux, reader, FALSE);
}
} else {
/* playing backward */
guint i;
gsize limit = 0;
if (splitmux->cur_part > lookahead) {
limit = splitmux->cur_part - lookahead;
}
for (i = splitmux->cur_part; i > limit; i--) {
GstSplitMuxPartReader *reader = splitmux->parts[i - 1];
if (!gst_splitmux_part_reader_is_loaded (reader)) {
GST_DEBUG_OBJECT (splitmux,
"Loading part %u reader %" GST_PTR_FORMAT " for lookahead (cur %u)",
i - 1, reader, splitmux->cur_part);
gst_object_ref (reader);
add_to_active_readers (splitmux, reader, FALSE);
SPLITMUX_SRC_UNLOCK (splitmux);
/* Drop lock before calling activate, as it might call back
* into the splitmuxsrc when exposing pads */
gst_splitmux_part_reader_prepare (reader);
gst_object_unref (reader);
/* Only prepare one part at a time */
return;
}
/* Already active, but promote it in the LRU list */
add_to_active_readers (splitmux, reader, FALSE);
}
}
done:
SPLITMUX_SRC_UNLOCK (splitmux);
}
/* Called with SPLITMUX lock held */
static void
schedule_lookahead_check (GstSplitMuxSrc * splitmux)
{
if (splitmux->lookahead_check_pending || splitmux->num_lookahead == 0
|| splitmux->target_max_readers == 0) {
/* No need to do lookahead checks */
return;
}
splitmux->lookahead_check_pending = TRUE;
gst_element_call_async (GST_ELEMENT_CAST (splitmux),
(GstElementCallAsyncFunc) do_lookahead_check, NULL, NULL);
}
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