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gstreamer/gst/multifile/gstsplitmuxsink.c
Vivia Nikolaidou 96cd941788 splitmux: Drop allocation queries 
They can cause us to deadlock, while we're waiting for a new frame and
upstream is waiting for the allocation query to be answered before
sending a frame

https://bugzilla.gnome.org/show_bug.cgi?id=783753
2017-06-13 18:29:37 +03:00

2308 lines
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/* GStreamer Muxer bin that splits output stream by size/time
* 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-splitmuxsink
* @short_description: Muxer wrapper for splitting output stream by size or time
*
* This element wraps a muxer and a sink, and starts a new file when the mux
* contents are about to cross a threshold of maximum size of maximum time,
* splitting at video keyframe boundaries. Exactly one input video stream
* can be muxed, with as many accompanying audio and subtitle streams as
* desired.
*
* By default, it uses mp4mux and filesink, but they can be changed via
* the 'muxer' and 'sink' properties.
*
* The minimum file size is 1 GOP, however - so limits may be overrun if the
* distance between any 2 keyframes is larger than the limits.
*
* If a video stream is available, the splitting process is driven by the video
* stream contents, and the video stream must contain closed GOPs for the output
* file parts to be played individually correctly. In the absence of a video
* stream, the first available stream is used as reference for synchronization.
*
* <refsect2>
* <title>Example pipelines</title>
* |[
* gst-launch-1.0 -e v4l2src num-buffers=500 ! video/x-raw,width=320,height=240 ! videoconvert ! queue ! timeoverlay ! x264enc key-int-max=10 ! h264parse ! splitmuxsink location=video%02d.mov max-size-time=10000000000 max-size-bytes=1000000
* ]|
* Records a video stream captured from a v4l2 device and muxes it into
* ISO mp4 files, splitting as needed to limit size/duration to 10 seconds
* and 1MB maximum size.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <glib/gstdio.h>
#include <gst/video/video.h>
#include "gstsplitmuxsink.h"
GST_DEBUG_CATEGORY_STATIC (splitmux_debug);
#define GST_CAT_DEFAULT splitmux_debug
#define GST_SPLITMUX_LOCK(s) g_mutex_lock(&(s)->lock)
#define GST_SPLITMUX_UNLOCK(s) g_mutex_unlock(&(s)->lock)
#define GST_SPLITMUX_WAIT_INPUT(s) g_cond_wait (&(s)->input_cond, &(s)->lock)
#define GST_SPLITMUX_BROADCAST_INPUT(s) g_cond_broadcast (&(s)->input_cond)
#define GST_SPLITMUX_WAIT_OUTPUT(s) g_cond_wait (&(s)->output_cond, &(s)->lock)
#define GST_SPLITMUX_BROADCAST_OUTPUT(s) g_cond_broadcast (&(s)->output_cond)
enum
{
PROP_0,
PROP_LOCATION,
PROP_MAX_SIZE_TIME,
PROP_MAX_SIZE_BYTES,
PROP_MAX_SIZE_TIMECODE,
PROP_SEND_KEYFRAME_REQUESTS,
PROP_MAX_FILES,
PROP_MUXER_OVERHEAD,
PROP_ALIGNMENT_THRESHOLD,
PROP_MUXER,
PROP_SINK
};
#define DEFAULT_MAX_SIZE_TIME 0
#define DEFAULT_MAX_SIZE_BYTES 0
#define DEFAULT_MAX_FILES 0
#define DEFAULT_MUXER_OVERHEAD 0.02
#define DEFAULT_SEND_KEYFRAME_REQUESTS FALSE
#define DEFAULT_ALIGNMENT_THRESHOLD 0
#define DEFAULT_MUXER "mp4mux"
#define DEFAULT_SINK "filesink"
enum
{
SIGNAL_FORMAT_LOCATION,
SIGNAL_FORMAT_LOCATION_FULL,
SIGNAL_LAST
};
static guint signals[SIGNAL_LAST];
static GstStaticPadTemplate video_sink_template =
GST_STATIC_PAD_TEMPLATE ("video",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate audio_sink_template =
GST_STATIC_PAD_TEMPLATE ("audio_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate subtitle_sink_template =
GST_STATIC_PAD_TEMPLATE ("subtitle_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GQuark PAD_CONTEXT;
static void
_do_init (void)
{
PAD_CONTEXT = g_quark_from_static_string ("pad-context");
}
#define gst_splitmux_sink_parent_class parent_class
G_DEFINE_TYPE_EXTENDED (GstSplitMuxSink, gst_splitmux_sink, GST_TYPE_BIN, 0,
_do_init ());
static gboolean create_muxer (GstSplitMuxSink * splitmux);
static gboolean create_sink (GstSplitMuxSink * splitmux);
static void gst_splitmux_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_splitmux_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_splitmux_sink_dispose (GObject * object);
static void gst_splitmux_sink_finalize (GObject * object);
static GstPad *gst_splitmux_sink_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
static void gst_splitmux_sink_release_pad (GstElement * element, GstPad * pad);
static GstStateChangeReturn gst_splitmux_sink_change_state (GstElement *
element, GstStateChange transition);
static void bus_handler (GstBin * bin, GstMessage * msg);
static void set_next_filename (GstSplitMuxSink * splitmux, MqStreamCtx * ctx);
static void start_next_fragment (GstSplitMuxSink * splitmux, MqStreamCtx * ctx);
static void mq_stream_ctx_unref (MqStreamCtx * ctx);
static void grow_blocked_queues (GstSplitMuxSink * splitmux);
static void gst_splitmux_sink_ensure_max_files (GstSplitMuxSink * splitmux);
static GstElement *create_element (GstSplitMuxSink * splitmux,
const gchar * factory, const gchar * name, gboolean locked);
static void do_async_done (GstSplitMuxSink * splitmux);
static MqStreamBuf *
mq_stream_buf_new (void)
{
return g_slice_new0 (MqStreamBuf);
}
static void
mq_stream_buf_free (MqStreamBuf * data)
{
g_slice_free (MqStreamBuf, data);
}
static SplitMuxOutputCommand *
out_cmd_buf_new (void)
{
return g_slice_new0 (SplitMuxOutputCommand);
}
static void
out_cmd_buf_free (SplitMuxOutputCommand * data)
{
g_slice_free (SplitMuxOutputCommand, data);
}
static void
gst_splitmux_sink_class_init (GstSplitMuxSinkClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
GstBinClass *gstbin_class = (GstBinClass *) klass;
gobject_class->set_property = gst_splitmux_sink_set_property;
gobject_class->get_property = gst_splitmux_sink_get_property;
gobject_class->dispose = gst_splitmux_sink_dispose;
gobject_class->finalize = gst_splitmux_sink_finalize;
gst_element_class_set_static_metadata (gstelement_class,
"Split Muxing Bin", "Generic/Bin/Muxer",
"Convenience bin that muxes incoming streams into multiple time/size limited files",
"Jan Schmidt <jan@centricular.com>");
gst_element_class_add_static_pad_template (gstelement_class,
&video_sink_template);
gst_element_class_add_static_pad_template (gstelement_class,
&audio_sink_template);
gst_element_class_add_static_pad_template (gstelement_class,
&subtitle_sink_template);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_splitmux_sink_change_state);
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_splitmux_sink_request_new_pad);
gstelement_class->release_pad =
GST_DEBUG_FUNCPTR (gst_splitmux_sink_release_pad);
gstbin_class->handle_message = bus_handler;
g_object_class_install_property (gobject_class, PROP_LOCATION,
g_param_spec_string ("location", "File Output Pattern",
"Format string pattern for the location of the files to write (e.g. video%05d.mp4)",
NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MUXER_OVERHEAD,
g_param_spec_double ("mux-overhead", "Muxing Overhead",
"Extra size overhead of muxing (0.02 = 2%)", 0.0, 1.0,
DEFAULT_MUXER_OVERHEAD,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MAX_SIZE_TIME,
g_param_spec_uint64 ("max-size-time", "Max. size (ns)",
"Max. amount of time per file (in ns, 0=disable)", 0, G_MAXUINT64,
DEFAULT_MAX_SIZE_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MAX_SIZE_BYTES,
g_param_spec_uint64 ("max-size-bytes", "Max. size bytes",
"Max. amount of data per file (in bytes, 0=disable)", 0, G_MAXUINT64,
DEFAULT_MAX_SIZE_BYTES, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MAX_SIZE_TIMECODE,
g_param_spec_string ("max-size-timecode", "Maximum timecode difference",
"Maximum difference in timecode between first and last frame. "
"Separator is assumed to be \":\" everywhere (e.g. 01:00:00:00). "
"Will only be effective if a timecode track is present.",
NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SEND_KEYFRAME_REQUESTS,
g_param_spec_boolean ("send-keyframe-requests",
"Request keyframes at max-size-time",
"Request a keyframe every max-size-time ns to try splitting at that point. "
"Needs max-size-bytes to be 0 in order to be effective.",
DEFAULT_SEND_KEYFRAME_REQUESTS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MAX_FILES,
g_param_spec_uint ("max-files", "Max files",
"Maximum number of files to keep on disk. Once the maximum is reached,"
"old files start to be deleted to make room for new ones.", 0,
G_MAXUINT, DEFAULT_MAX_FILES,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_ALIGNMENT_THRESHOLD,
g_param_spec_uint64 ("alignment-threshold", "Alignment threshold (ns)",
"Allow non-reference streams to be that many ns before the reference"
" stream",
0, G_MAXUINT64, DEFAULT_ALIGNMENT_THRESHOLD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MUXER,
g_param_spec_object ("muxer", "Muxer",
"The muxer element to use (NULL = default mp4mux)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SINK,
g_param_spec_object ("sink", "Sink",
"The sink element (or element chain) to use (NULL = default filesink)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstSplitMuxSink::format-location:
* @splitmux: the #GstSplitMuxSink
* @fragment_id: the sequence number of the file to be created
*
* Returns: the location to be used for the next output file
*/
signals[SIGNAL_FORMAT_LOCATION] =
g_signal_new ("format-location", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_STRING, 1, G_TYPE_UINT);
/**
* GstSplitMuxSink::format-location-full:
* @splitmux: the #GstSplitMuxSink
* @fragment_id: the sequence number of the file to be created
* @first_sample: A #GstSample containing the first buffer
* from the reference stream in the new file
*
* Returns: the location to be used for the next output file
*/
signals[SIGNAL_FORMAT_LOCATION_FULL] =
g_signal_new ("format-location-full", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_STRING, 2, G_TYPE_UINT,
GST_TYPE_SAMPLE);
}
static void
gst_splitmux_sink_init (GstSplitMuxSink * splitmux)
{
g_mutex_init (&splitmux->lock);
g_cond_init (&splitmux->input_cond);
g_cond_init (&splitmux->output_cond);
g_queue_init (&splitmux->out_cmd_q);
splitmux->mux_overhead = DEFAULT_MUXER_OVERHEAD;
splitmux->threshold_time = DEFAULT_MAX_SIZE_TIME;
splitmux->threshold_bytes = DEFAULT_MAX_SIZE_BYTES;
splitmux->max_files = DEFAULT_MAX_FILES;
splitmux->send_keyframe_requests = DEFAULT_SEND_KEYFRAME_REQUESTS;
splitmux->next_max_tc_time = GST_CLOCK_TIME_NONE;
splitmux->alignment_threshold = DEFAULT_ALIGNMENT_THRESHOLD;
splitmux->threshold_timecode_str = NULL;
GST_OBJECT_FLAG_SET (splitmux, GST_ELEMENT_FLAG_SINK);
}
static void
gst_splitmux_reset (GstSplitMuxSink * splitmux)
{
if (splitmux->muxer) {
gst_element_set_locked_state (splitmux->muxer, TRUE);
gst_element_set_state (splitmux->muxer, GST_STATE_NULL);
gst_bin_remove (GST_BIN (splitmux), splitmux->muxer);
}
if (splitmux->active_sink) {
gst_element_set_locked_state (splitmux->active_sink, TRUE);
gst_element_set_state (splitmux->active_sink, GST_STATE_NULL);
gst_bin_remove (GST_BIN (splitmux), splitmux->active_sink);
}
splitmux->sink = splitmux->active_sink = splitmux->muxer = NULL;
}
static void
gst_splitmux_sink_dispose (GObject * object)
{
GstSplitMuxSink *splitmux = GST_SPLITMUX_SINK (object);
/* Calling parent dispose invalidates all child pointers */
splitmux->sink = splitmux->active_sink = splitmux->muxer = NULL;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_splitmux_sink_finalize (GObject * object)
{
GstSplitMuxSink *splitmux = GST_SPLITMUX_SINK (object);
g_cond_clear (&splitmux->input_cond);
g_cond_clear (&splitmux->output_cond);
g_mutex_clear (&splitmux->lock);
g_queue_foreach (&splitmux->out_cmd_q, (GFunc) out_cmd_buf_free, NULL);
g_queue_clear (&splitmux->out_cmd_q);
if (splitmux->provided_sink)
gst_object_unref (splitmux->provided_sink);
if (splitmux->provided_muxer)
gst_object_unref (splitmux->provided_muxer);
if (splitmux->threshold_timecode_str)
g_free (splitmux->threshold_timecode_str);
g_free (splitmux->location);
/* Make sure to free any un-released contexts */
g_list_foreach (splitmux->contexts, (GFunc) mq_stream_ctx_unref, NULL);
g_list_free (splitmux->contexts);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_splitmux_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstSplitMuxSink *splitmux = GST_SPLITMUX_SINK (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_MAX_SIZE_BYTES:
GST_OBJECT_LOCK (splitmux);
splitmux->threshold_bytes = g_value_get_uint64 (value);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_MAX_SIZE_TIME:
GST_OBJECT_LOCK (splitmux);
splitmux->threshold_time = g_value_get_uint64 (value);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_MAX_SIZE_TIMECODE:
GST_OBJECT_LOCK (splitmux);
splitmux->threshold_timecode_str = g_value_dup_string (value);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_SEND_KEYFRAME_REQUESTS:
GST_OBJECT_LOCK (splitmux);
splitmux->send_keyframe_requests = g_value_get_boolean (value);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_MAX_FILES:
GST_OBJECT_LOCK (splitmux);
splitmux->max_files = g_value_get_uint (value);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_MUXER_OVERHEAD:
GST_OBJECT_LOCK (splitmux);
splitmux->mux_overhead = g_value_get_double (value);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_ALIGNMENT_THRESHOLD:
GST_OBJECT_LOCK (splitmux);
splitmux->alignment_threshold = g_value_get_uint64 (value);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_SINK:
GST_OBJECT_LOCK (splitmux);
if (splitmux->provided_sink)
gst_object_unref (splitmux->provided_sink);
splitmux->provided_sink = g_value_get_object (value);
gst_object_ref_sink (splitmux->provided_sink);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_MUXER:
GST_OBJECT_LOCK (splitmux);
if (splitmux->provided_muxer)
gst_object_unref (splitmux->provided_muxer);
splitmux->provided_muxer = g_value_get_object (value);
gst_object_ref_sink (splitmux->provided_muxer);
GST_OBJECT_UNLOCK (splitmux);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_splitmux_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstSplitMuxSink *splitmux = GST_SPLITMUX_SINK (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_MAX_SIZE_BYTES:
GST_OBJECT_LOCK (splitmux);
g_value_set_uint64 (value, splitmux->threshold_bytes);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_MAX_SIZE_TIME:
GST_OBJECT_LOCK (splitmux);
g_value_set_uint64 (value, splitmux->threshold_time);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_MAX_SIZE_TIMECODE:
GST_OBJECT_LOCK (splitmux);
g_value_set_string (value, splitmux->threshold_timecode_str);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_SEND_KEYFRAME_REQUESTS:
GST_OBJECT_LOCK (splitmux);
g_value_set_boolean (value, splitmux->send_keyframe_requests);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_MAX_FILES:
GST_OBJECT_LOCK (splitmux);
g_value_set_uint (value, splitmux->max_files);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_MUXER_OVERHEAD:
GST_OBJECT_LOCK (splitmux);
g_value_set_double (value, splitmux->mux_overhead);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_ALIGNMENT_THRESHOLD:
GST_OBJECT_LOCK (splitmux);
g_value_set_uint64 (value, splitmux->alignment_threshold);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_SINK:
GST_OBJECT_LOCK (splitmux);
g_value_set_object (value, splitmux->provided_sink);
GST_OBJECT_UNLOCK (splitmux);
break;
case PROP_MUXER:
GST_OBJECT_LOCK (splitmux);
g_value_set_object (value, splitmux->provided_muxer);
GST_OBJECT_UNLOCK (splitmux);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* Convenience function */
static inline GstClockTimeDiff
my_segment_to_running_time (GstSegment * segment, GstClockTime val)
{
GstClockTimeDiff res = GST_CLOCK_STIME_NONE;
if (GST_CLOCK_TIME_IS_VALID (val)) {
gboolean sign =
gst_segment_to_running_time_full (segment, GST_FORMAT_TIME, val, &val);
if (sign > 0)
res = val;
else if (sign < 0)
res = -val;
}
return res;
}
static MqStreamCtx *
mq_stream_ctx_new (GstSplitMuxSink * splitmux)
{
MqStreamCtx *ctx;
ctx = g_new0 (MqStreamCtx, 1);
g_atomic_int_set (&ctx->refcount, 1);
ctx->splitmux = splitmux;
gst_segment_init (&ctx->in_segment, GST_FORMAT_UNDEFINED);
gst_segment_init (&ctx->out_segment, GST_FORMAT_UNDEFINED);
ctx->in_running_time = ctx->out_running_time = GST_CLOCK_STIME_NONE;
g_queue_init (&ctx->queued_bufs);
return ctx;
}
static void
mq_stream_ctx_free (MqStreamCtx * ctx)
{
if (ctx->q) {
g_signal_handler_disconnect (ctx->q, ctx->q_overrun_id);
gst_element_set_locked_state (ctx->q, TRUE);
gst_element_set_state (ctx->q, GST_STATE_NULL);
gst_bin_remove (GST_BIN (ctx->splitmux), ctx->q);
gst_object_unref (ctx->q);
}
gst_buffer_replace (&ctx->prev_in_keyframe, NULL);
gst_object_unref (ctx->sinkpad);
gst_object_unref (ctx->srcpad);
g_queue_foreach (&ctx->queued_bufs, (GFunc) mq_stream_buf_free, NULL);
g_queue_clear (&ctx->queued_bufs);
g_free (ctx);
}
static void
mq_stream_ctx_unref (MqStreamCtx * ctx)
{
if (g_atomic_int_dec_and_test (&ctx->refcount))
mq_stream_ctx_free (ctx);
}
static void
mq_stream_ctx_ref (MqStreamCtx * ctx)
{
g_atomic_int_inc (&ctx->refcount);
}
static void
_pad_block_destroy_sink_notify (MqStreamCtx * ctx)
{
ctx->sink_pad_block_id = 0;
mq_stream_ctx_unref (ctx);
}
static void
_pad_block_destroy_src_notify (MqStreamCtx * ctx)
{
ctx->src_pad_block_id = 0;
mq_stream_ctx_unref (ctx);
}
static void
send_fragment_opened_closed_msg (GstSplitMuxSink * splitmux, gboolean opened)
{
gchar *location = NULL;
GstMessage *msg;
const gchar *msg_name = opened ?
"splitmuxsink-fragment-opened" : "splitmuxsink-fragment-closed";
g_object_get (splitmux->sink, "location", &location, NULL);
msg = gst_message_new_element (GST_OBJECT (splitmux),
gst_structure_new (msg_name,
"location", G_TYPE_STRING, location,
"running-time", GST_TYPE_CLOCK_TIME,
splitmux->reference_ctx->out_running_time, NULL));
gst_element_post_message (GST_ELEMENT_CAST (splitmux), msg);
g_free (location);
}
/* Called with lock held, drops the lock to send EOS to the
* pad
*/
static void
send_eos (GstSplitMuxSink * splitmux, MqStreamCtx * ctx)
{
GstEvent *eos;
GstPad *pad;
eos = gst_event_new_eos ();
pad = gst_pad_get_peer (ctx->srcpad);
ctx->out_eos = TRUE;
GST_INFO_OBJECT (splitmux, "Sending EOS on %" GST_PTR_FORMAT, pad);
GST_SPLITMUX_UNLOCK (splitmux);
gst_pad_send_event (pad, eos);
GST_SPLITMUX_LOCK (splitmux);
gst_object_unref (pad);
}
/* Called with splitmux lock held to check if this output
* context needs to sleep to wait for the release of the
* next GOP, or to send EOS to close out the current file
*/
static void
complete_or_wait_on_out (GstSplitMuxSink * splitmux, MqStreamCtx * ctx)
{
if (ctx->caps_change)
return;
do {
/* When first starting up, the reference stream has to output
* the first buffer to prepare the muxer and sink */
gboolean can_output = (ctx->is_reference || splitmux->ready_for_output);
GstClockTimeDiff my_max_out_running_time = splitmux->max_out_running_time;
if (!(splitmux->max_out_running_time == 0 ||
splitmux->max_out_running_time == GST_CLOCK_STIME_NONE ||
splitmux->alignment_threshold == 0 ||
splitmux->max_out_running_time < splitmux->alignment_threshold)) {
my_max_out_running_time -= splitmux->alignment_threshold;
GST_LOG_OBJECT (ctx->srcpad,
"Max out running time currently %" GST_STIME_FORMAT
", with threshold applied it is %" GST_STIME_FORMAT,
GST_STIME_ARGS (splitmux->max_out_running_time),
GST_STIME_ARGS (my_max_out_running_time));
}
if (ctx->flushing
|| splitmux->output_state == SPLITMUX_OUTPUT_STATE_STOPPED)
return;
GST_LOG_OBJECT (ctx->srcpad,
"Checking running time %" GST_STIME_FORMAT " against max %"
GST_STIME_FORMAT, GST_STIME_ARGS (ctx->out_running_time),
GST_STIME_ARGS (my_max_out_running_time));
if (can_output) {
if (splitmux->max_out_running_time == GST_CLOCK_STIME_NONE ||
ctx->out_running_time < my_max_out_running_time) {
return;
}
switch (splitmux->output_state) {
case SPLITMUX_OUTPUT_STATE_OUTPUT_GOP:
/* We only get here if we've finished outputting a GOP and need to know
* what to do next */
splitmux->output_state = SPLITMUX_OUTPUT_STATE_AWAITING_COMMAND;
GST_SPLITMUX_BROADCAST_OUTPUT (splitmux);
continue;
case SPLITMUX_OUTPUT_STATE_ENDING_FILE:
/* We've reached the max out running_time to get here, so end this file now */
if (ctx->out_eos == FALSE) {
send_eos (splitmux, ctx);
continue;
}
break;
case SPLITMUX_OUTPUT_STATE_START_NEXT_FILE:
if (ctx->is_reference) {
/* Special handling on the reference ctx to start new fragments
* and collect commands from the command queue */
/* drops the splitmux lock briefly: */
start_next_fragment (splitmux, ctx);
continue;
}
break;
case SPLITMUX_OUTPUT_STATE_AWAITING_COMMAND:{
do {
SplitMuxOutputCommand *cmd =
g_queue_pop_tail (&splitmux->out_cmd_q);
if (cmd != NULL) {
/* If we pop the last command, we need to make our queues bigger */
if (g_queue_get_length (&splitmux->out_cmd_q) == 0)
grow_blocked_queues (splitmux);
if (cmd->start_new_fragment) {
GST_DEBUG_OBJECT (splitmux, "Got cmd to start new fragment");
splitmux->output_state = SPLITMUX_OUTPUT_STATE_ENDING_FILE;
} else {
GST_DEBUG_OBJECT (splitmux,
"Got new output cmd for time %" GST_STIME_FORMAT,
GST_STIME_ARGS (cmd->max_output_ts));
/* Extend the output range immediately */
splitmux->max_out_running_time = cmd->max_output_ts;
splitmux->output_state = SPLITMUX_OUTPUT_STATE_OUTPUT_GOP;
}
GST_SPLITMUX_BROADCAST_OUTPUT (splitmux);
out_cmd_buf_free (cmd);
break;
} else {
GST_SPLITMUX_WAIT_OUTPUT (splitmux);
}
} while (splitmux->output_state ==
SPLITMUX_OUTPUT_STATE_AWAITING_COMMAND);
/* loop and re-check the state */
continue;
}
case SPLITMUX_OUTPUT_STATE_STOPPED:
return;
}
}
GST_INFO_OBJECT (ctx->srcpad,
"Sleeping for running time %"
GST_STIME_FORMAT " (max %" GST_STIME_FORMAT ") or state change.",
GST_STIME_ARGS (ctx->out_running_time),
GST_STIME_ARGS (splitmux->max_out_running_time));
GST_SPLITMUX_WAIT_OUTPUT (splitmux);
GST_INFO_OBJECT (ctx->srcpad,
"Woken for new max running time %" GST_STIME_FORMAT,
GST_STIME_ARGS (splitmux->max_out_running_time));
}
while (1);
}
static GstClockTime
calculate_next_max_timecode (GstSplitMuxSink * splitmux,
const GstVideoTimeCode * cur_tc)
{
GstVideoTimeCode *target_tc;
GstVideoTimeCodeInterval *tc_inter;
GstClockTime cur_tc_time, target_tc_time, next_max_tc_time;
if (cur_tc == NULL || splitmux->threshold_timecode_str == NULL)
return GST_CLOCK_TIME_NONE;
tc_inter =
gst_video_time_code_interval_new_from_string
(splitmux->threshold_timecode_str);
target_tc = gst_video_time_code_add_interval (cur_tc, tc_inter);
gst_video_time_code_interval_free (tc_inter);
/* Convert to ns */
target_tc_time = gst_video_time_code_nsec_since_daily_jam (target_tc);
cur_tc_time = gst_video_time_code_nsec_since_daily_jam (cur_tc);
/* Add fragment_start_time, accounting for wraparound */
if (target_tc_time >= cur_tc_time) {
next_max_tc_time =
target_tc_time - cur_tc_time + splitmux->fragment_start_time;
} else {
GstClockTime day_in_ns = 24 * 60 * 60 * GST_SECOND;
next_max_tc_time =
day_in_ns - cur_tc_time + target_tc_time +
splitmux->fragment_start_time;
}
GST_INFO_OBJECT (splitmux, "Next max TC time: %" GST_TIME_FORMAT
" from ref TC: %" GST_TIME_FORMAT, GST_TIME_ARGS (next_max_tc_time),
GST_TIME_ARGS (cur_tc_time));
gst_video_time_code_free (target_tc);
return next_max_tc_time;
}
static gboolean
request_next_keyframe (GstSplitMuxSink * splitmux, GstBuffer * buffer)
{
GstEvent *ev;
GstClockTime target_time;
gboolean timecode_based = FALSE;
splitmux->next_max_tc_time = GST_CLOCK_TIME_NONE;
if (splitmux->threshold_timecode_str) {
GstVideoTimeCodeMeta *tc_meta;
if (buffer != NULL) {
tc_meta = gst_buffer_get_video_time_code_meta (buffer);
if (tc_meta) {
splitmux->next_max_tc_time =
calculate_next_max_timecode (splitmux, &tc_meta->tc);
timecode_based = (splitmux->next_max_tc_time != GST_CLOCK_TIME_NONE);
}
} else {
/* This can happen in the presence of GAP events that trigger
* a new fragment start */
GST_WARNING_OBJECT (splitmux,
"No buffer available to calculate next timecode");
}
}
if (splitmux->send_keyframe_requests == FALSE
|| (splitmux->threshold_time == 0 && !timecode_based)
|| splitmux->threshold_bytes != 0)
return TRUE;
if (timecode_based) {
/* We might have rounding errors: aim slightly earlier */
target_time = splitmux->next_max_tc_time - 5 * GST_USECOND;
} else {
target_time = splitmux->fragment_start_time + splitmux->threshold_time;
}
ev = gst_video_event_new_upstream_force_key_unit (target_time, TRUE, 0);
GST_INFO_OBJECT (splitmux, "Requesting next keyframe at %" GST_TIME_FORMAT,
GST_TIME_ARGS (target_time));
return gst_pad_push_event (splitmux->reference_ctx->sinkpad, ev);
}
static GstPadProbeReturn
handle_mq_output (GstPad * pad, GstPadProbeInfo * info, MqStreamCtx * ctx)
{
GstSplitMuxSink *splitmux = ctx->splitmux;
MqStreamBuf *buf_info = NULL;
GST_LOG_OBJECT (pad, "Fired probe type 0x%x", info->type);
/* FIXME: Handle buffer lists, until then make it clear they won't work */
if (info->type & GST_PAD_PROBE_TYPE_BUFFER_LIST) {
g_warning ("Buffer list handling not implemented");
return GST_PAD_PROBE_DROP;
}
if (info->type & GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM ||
info->type & GST_PAD_PROBE_TYPE_EVENT_FLUSH) {
GstEvent *event = gst_pad_probe_info_get_event (info);
gboolean locked = FALSE;
GST_LOG_OBJECT (pad, "Event %" GST_PTR_FORMAT, event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT:
gst_event_copy_segment (event, &ctx->out_segment);
break;
case GST_EVENT_FLUSH_STOP:
GST_SPLITMUX_LOCK (splitmux);
locked = TRUE;
gst_segment_init (&ctx->out_segment, GST_FORMAT_UNDEFINED);
g_queue_foreach (&ctx->queued_bufs, (GFunc) mq_stream_buf_free, NULL);
g_queue_clear (&ctx->queued_bufs);
ctx->flushing = FALSE;
break;
case GST_EVENT_FLUSH_START:
GST_SPLITMUX_LOCK (splitmux);
locked = TRUE;
GST_LOG_OBJECT (pad, "Flush start");
ctx->flushing = TRUE;
GST_SPLITMUX_BROADCAST_OUTPUT (splitmux);
break;
case GST_EVENT_EOS:
GST_SPLITMUX_LOCK (splitmux);
locked = TRUE;
if (splitmux->output_state == SPLITMUX_OUTPUT_STATE_STOPPED)
goto beach;
ctx->out_eos = TRUE;
break;
case GST_EVENT_GAP:{
GstClockTime gap_ts;
GstClockTimeDiff rtime;
gst_event_parse_gap (event, &gap_ts, NULL);
if (gap_ts == GST_CLOCK_TIME_NONE)
break;
GST_SPLITMUX_LOCK (splitmux);
locked = TRUE;
if (splitmux->output_state == SPLITMUX_OUTPUT_STATE_STOPPED)
goto beach;
/* When we get a gap event on the
* reference stream and we're trying to open a
* new file, we need to store it until we get
* the buffer afterwards
*/
if (ctx->is_reference &&
(splitmux->output_state != SPLITMUX_OUTPUT_STATE_OUTPUT_GOP)) {
GST_DEBUG_OBJECT (pad, "Storing GAP event until buffer arrives");
gst_event_replace (&ctx->pending_gap, event);
GST_SPLITMUX_UNLOCK (splitmux);
return GST_PAD_PROBE_HANDLED;
}
rtime = my_segment_to_running_time (&ctx->out_segment, gap_ts);
GST_LOG_OBJECT (pad, "Have GAP w/ ts %" GST_STIME_FORMAT,
GST_STIME_ARGS (rtime));
if (rtime != GST_CLOCK_STIME_NONE) {
ctx->out_running_time = rtime;
complete_or_wait_on_out (splitmux, ctx);
}
break;
}
case GST_EVENT_CUSTOM_DOWNSTREAM:{
const GstStructure *s;
GstClockTimeDiff ts = 0;
s = gst_event_get_structure (event);
if (!gst_structure_has_name (s, "splitmuxsink-unblock"))
break;
gst_structure_get_int64 (s, "timestamp", &ts);
GST_SPLITMUX_LOCK (splitmux);
locked = TRUE;
if (splitmux->output_state == SPLITMUX_OUTPUT_STATE_STOPPED)
goto beach;
ctx->out_running_time = ts;
if (!ctx->is_reference)
complete_or_wait_on_out (splitmux, ctx);
GST_SPLITMUX_UNLOCK (splitmux);
return GST_PAD_PROBE_DROP;
}
case GST_EVENT_CAPS:{
GstPad *peer;
if (!ctx->is_reference)
break;
peer = gst_pad_get_peer (pad);
if (peer) {
gboolean ok = gst_pad_send_event (peer, gst_event_ref (event));
gst_object_unref (peer);
if (ok)
break;
} else {
break;
}
/* This is in the case the muxer doesn't allow this change of caps */
GST_SPLITMUX_LOCK (splitmux);
locked = TRUE;
ctx->caps_change = TRUE;
splitmux->ready_for_output = FALSE;
if (splitmux->output_state != SPLITMUX_OUTPUT_STATE_START_NEXT_FILE) {
if (ctx->out_eos == FALSE) {
send_eos (splitmux, ctx);
}
splitmux->output_state = SPLITMUX_OUTPUT_STATE_START_NEXT_FILE;
}
/* Lets it fall through, if it fails again, then the muxer just can't
* support this format, but at least we have a closed file.
*/
break;
}
default:
break;
}
/* We need to make sure events aren't passed
* until the muxer / sink are ready for it */
if (!locked)
GST_SPLITMUX_LOCK (splitmux);
if (!ctx->is_reference)
complete_or_wait_on_out (splitmux, ctx);
GST_SPLITMUX_UNLOCK (splitmux);
/* Don't try to forward sticky events before the next buffer is there
* because it would cause a new file to be created without the first
* buffer being available.
*/
if (ctx->caps_change && GST_EVENT_IS_STICKY (event))
return GST_PAD_PROBE_DROP;
else
return GST_PAD_PROBE_PASS;
}
/* Allow everything through until the configured next stopping point */
GST_SPLITMUX_LOCK (splitmux);
buf_info = g_queue_pop_tail (&ctx->queued_bufs);
if (buf_info == NULL)
/* Can only happen due to a poorly timed flush */
goto beach;
/* If we have popped a keyframe, decrement the queued_gop count */
if (buf_info->keyframe && splitmux->queued_keyframes > 0)
splitmux->queued_keyframes--;
ctx->out_running_time = buf_info->run_ts;
ctx->cur_out_buffer = gst_pad_probe_info_get_buffer (info);
GST_LOG_OBJECT (splitmux,
"Pad %" GST_PTR_FORMAT " buffer with run TS %" GST_STIME_FORMAT
" size %" G_GUINT64_FORMAT,
pad, GST_STIME_ARGS (ctx->out_running_time), buf_info->buf_size);
ctx->caps_change = FALSE;
complete_or_wait_on_out (splitmux, ctx);
splitmux->muxed_out_bytes += buf_info->buf_size;
#ifndef GST_DISABLE_GST_DEBUG
{
GstBuffer *buf = gst_pad_probe_info_get_buffer (info);
GST_LOG_OBJECT (pad, "Returning to pass buffer %" GST_PTR_FORMAT
" run ts %" GST_STIME_FORMAT, buf,
GST_STIME_ARGS (ctx->out_running_time));
}
#endif
ctx->cur_out_buffer = NULL;
GST_SPLITMUX_UNLOCK (splitmux);
/* pending_gap is protected by the STREAM lock */
if (ctx->pending_gap) {
/* If we previously stored a gap event, send it now */
GstPad *peer = gst_pad_get_peer (ctx->srcpad);
GST_DEBUG_OBJECT (splitmux,
"Pad %" GST_PTR_FORMAT " sending pending GAP event", ctx->srcpad);
gst_pad_send_event (peer, ctx->pending_gap);
ctx->pending_gap = NULL;
gst_object_unref (peer);
}
mq_stream_buf_free (buf_info);
return GST_PAD_PROBE_PASS;
beach:
GST_SPLITMUX_UNLOCK (splitmux);
return GST_PAD_PROBE_DROP;
}
static gboolean
resend_sticky (GstPad * pad, GstEvent ** event, GstPad * peer)
{
return gst_pad_send_event (peer, gst_event_ref (*event));
}
static void
restart_context (MqStreamCtx * ctx, GstSplitMuxSink * splitmux)
{
GstPad *peer = gst_pad_get_peer (ctx->srcpad);
gst_pad_sticky_events_foreach (ctx->srcpad,
(GstPadStickyEventsForeachFunction) (resend_sticky), peer);
/* Clear EOS flag if not actually EOS */
ctx->out_eos = GST_PAD_IS_EOS (ctx->srcpad);
gst_object_unref (peer);
}
/* Called with lock held when a fragment
* reaches EOS and it is time to restart
* a new fragment
*/
static void
start_next_fragment (GstSplitMuxSink * splitmux, MqStreamCtx * ctx)
{
GstElement *muxer, *sink;
/* 1 change to new file */
splitmux->switching_fragment = TRUE;
/* We need to drop the splitmux lock to acquire the state lock
* here and ensure there's no racy state change going on elsewhere */
muxer = gst_object_ref (splitmux->muxer);
sink = gst_object_ref (splitmux->active_sink);
GST_SPLITMUX_UNLOCK (splitmux);
GST_STATE_LOCK (splitmux);
gst_element_set_locked_state (muxer, TRUE);
gst_element_set_locked_state (sink, TRUE);
gst_element_set_state (muxer, GST_STATE_NULL);
gst_element_set_state (sink, GST_STATE_NULL);
GST_SPLITMUX_LOCK (splitmux);
if (splitmux->muxed_out_bytes > 0 || splitmux->fragment_id == 0)
set_next_filename (splitmux, ctx);
splitmux->muxed_out_bytes = 0;
GST_SPLITMUX_UNLOCK (splitmux);
gst_element_set_state (sink, GST_STATE_TARGET (splitmux));
gst_element_set_state (muxer, GST_STATE_TARGET (splitmux));
gst_element_set_locked_state (muxer, FALSE);
gst_element_set_locked_state (sink, FALSE);
gst_object_unref (sink);
gst_object_unref (muxer);
GST_SPLITMUX_LOCK (splitmux);
GST_STATE_UNLOCK (splitmux);
splitmux->switching_fragment = FALSE;
do_async_done (splitmux);
splitmux->ready_for_output = TRUE;
g_list_foreach (splitmux->contexts, (GFunc) restart_context, splitmux);
send_fragment_opened_closed_msg (splitmux, TRUE);
/* FIXME: Is this always the correct next state? */
splitmux->output_state = SPLITMUX_OUTPUT_STATE_AWAITING_COMMAND;
GST_SPLITMUX_BROADCAST_OUTPUT (splitmux);
}
static void
bus_handler (GstBin * bin, GstMessage * message)
{
GstSplitMuxSink *splitmux = GST_SPLITMUX_SINK (bin);
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_EOS:
/* If the state is draining out the current file, drop this EOS */
GST_SPLITMUX_LOCK (splitmux);
send_fragment_opened_closed_msg (splitmux, FALSE);
if (splitmux->output_state == SPLITMUX_OUTPUT_STATE_ENDING_FILE) {
GST_DEBUG_OBJECT (splitmux, "Caught EOS at end of fragment, dropping");
splitmux->output_state = SPLITMUX_OUTPUT_STATE_START_NEXT_FILE;
GST_SPLITMUX_BROADCAST_OUTPUT (splitmux);
gst_message_unref (message);
GST_SPLITMUX_UNLOCK (splitmux);
return;
} else {
GST_DEBUG_OBJECT (splitmux,
"Passing EOS message. Output state %d max_out_running_time %"
GST_STIME_FORMAT, splitmux->output_state,
GST_STIME_ARGS (splitmux->max_out_running_time));
}
GST_SPLITMUX_UNLOCK (splitmux);
break;
case GST_MESSAGE_ASYNC_START:
case GST_MESSAGE_ASYNC_DONE:
/* Ignore state changes from our children while switching */
if (splitmux->switching_fragment) {
if (GST_MESSAGE_SRC (message) == (GstObject *) splitmux->active_sink
|| GST_MESSAGE_SRC (message) == (GstObject *) splitmux->muxer) {
GST_LOG_OBJECT (splitmux,
"Ignoring state change from child %" GST_PTR_FORMAT
" while switching", GST_MESSAGE_SRC (message));
gst_message_unref (message);
return;
}
}
break;
default:
break;
}
GST_BIN_CLASS (parent_class)->handle_message (bin, message);
}
static void
ctx_set_unblock (MqStreamCtx * ctx)
{
ctx->need_unblock = TRUE;
}
/* Called with splitmux lock held */
/* Called when entering ProcessingCompleteGop state
* Assess if mq contents overflowed the current file
* -> If yes, need to switch to new file
* -> if no, set max_out_running_time to let this GOP in and
* go to COLLECTING_GOP_START state
*/
static void
handle_gathered_gop (GstSplitMuxSink * splitmux)
{
guint64 queued_bytes;
GstClockTimeDiff queued_time = 0;
GstClockTimeDiff new_out_ts = splitmux->reference_ctx->in_running_time;
SplitMuxOutputCommand *cmd;
/* Assess if the multiqueue contents overflowed the current file */
/* When considering if a newly gathered GOP overflows
* the time limit for the file, only consider the running time of the
* reference stream. Other streams might have run ahead a little bit,
* but extra pieces won't be released to the muxer beyond the reference
* stream cut-off anyway - so it forms the limit. */
queued_bytes = splitmux->fragment_total_bytes + splitmux->gop_total_bytes;
queued_time = splitmux->reference_ctx->in_running_time;
GST_LOG_OBJECT (splitmux, " queued_bytes %" G_GUINT64_FORMAT, queued_bytes);
g_assert (queued_time >= splitmux->fragment_start_time);
queued_time -= splitmux->fragment_start_time;
/* Expand queued bytes estimate by muxer overhead */
queued_bytes += (queued_bytes * splitmux->mux_overhead);
GST_LOG_OBJECT (splitmux, "mq at TS %" GST_STIME_FORMAT
" bytes %" G_GUINT64_FORMAT, GST_STIME_ARGS (queued_time), queued_bytes);
if (splitmux->next_max_tc_time != GST_CLOCK_TIME_NONE) {
GST_LOG_OBJECT (splitmux,
"timecode mq TS %" GST_TIME_FORMAT " vs target %" GST_TIME_FORMAT,
GST_TIME_ARGS (splitmux->reference_ctx->in_running_time),
GST_TIME_ARGS (splitmux->next_max_tc_time + 5 * GST_USECOND));
}
/* Check for overrun - have we output at least one byte and overrun
* either threshold? */
/* Timecode-based threshold accounts for possible rounding errors:
* 5us should be bigger than all possible rounding errors but nowhere near
* big enough to skip to another frame */
if ((splitmux->fragment_total_bytes > 0 &&
((splitmux->threshold_bytes > 0 &&
queued_bytes > splitmux->threshold_bytes) ||
(splitmux->threshold_time > 0 &&
queued_time > splitmux->threshold_time) ||
(splitmux->next_max_tc_time != GST_CLOCK_TIME_NONE &&
splitmux->reference_ctx->in_running_time >
splitmux->next_max_tc_time + 5 * GST_USECOND)))) {
/* Tell the output side to start a new fragment */
GST_INFO_OBJECT (splitmux,
"This GOP (dur %" GST_STIME_FORMAT
") would overflow the fragment, Sending start_new_fragment cmd",
GST_STIME_ARGS (splitmux->reference_ctx->in_running_time -
splitmux->gop_start_time));
cmd = out_cmd_buf_new ();
cmd->start_new_fragment = TRUE;
g_queue_push_head (&splitmux->out_cmd_q, cmd);
GST_SPLITMUX_BROADCAST_OUTPUT (splitmux);
new_out_ts = splitmux->reference_ctx->in_running_time;
splitmux->fragment_start_time = splitmux->gop_start_time;
splitmux->fragment_total_bytes = 0;
if (request_next_keyframe (splitmux,
splitmux->reference_ctx->prev_in_keyframe) == FALSE) {
GST_WARNING_OBJECT (splitmux,
"Could not request a keyframe. Files may not split at the exact location they should");
}
gst_buffer_replace (&splitmux->reference_ctx->prev_in_keyframe, NULL);
}
/* And set up to collect the next GOP */
if (!splitmux->reference_ctx->in_eos) {
splitmux->input_state = SPLITMUX_INPUT_STATE_COLLECTING_GOP_START;
splitmux->gop_start_time = new_out_ts;
} else {
/* This is probably already the current state, but just in case: */
splitmux->input_state = SPLITMUX_INPUT_STATE_FINISHING_UP;
new_out_ts = GST_CLOCK_STIME_NONE; /* EOS runs until forever */
}
/* And wake all input contexts to send a wake-up event */
g_list_foreach (splitmux->contexts, (GFunc) ctx_set_unblock, NULL);
GST_SPLITMUX_BROADCAST_INPUT (splitmux);
/* Now either way - either there was no overflow, or we requested a new fragment: release this GOP */
splitmux->fragment_total_bytes += splitmux->gop_total_bytes;
if (splitmux->gop_total_bytes > 0) {
GST_LOG_OBJECT (splitmux,
"Releasing GOP to output. Bytes in fragment now %" G_GUINT64_FORMAT
" time %" GST_STIME_FORMAT,
splitmux->fragment_total_bytes, GST_STIME_ARGS (queued_time));
/* Send this GOP to the output command queue */
cmd = out_cmd_buf_new ();
cmd->start_new_fragment = FALSE;
cmd->max_output_ts = new_out_ts;
GST_LOG_OBJECT (splitmux, "Sending GOP cmd to output for TS %"
GST_STIME_FORMAT, GST_STIME_ARGS (new_out_ts));
g_queue_push_head (&splitmux->out_cmd_q, cmd);
GST_SPLITMUX_BROADCAST_OUTPUT (splitmux);
}
splitmux->gop_total_bytes = 0;
}
/* Called with splitmux lock held */
/* Called from each input pad when it is has all the pieces
* for a GOP or EOS, starting with the reference pad which has set the
* splitmux->max_in_running_time
*/
static void
check_completed_gop (GstSplitMuxSink * splitmux, MqStreamCtx * ctx)
{
GList *cur;
GstEvent *event;
/* On ENDING_FILE, the reference stream sends a command to start a new
* fragment, then releases the GOP for output in the new fragment.
* If somes streams received no buffer during the last GOP that overran,
* because its next buffer has a timestamp bigger than
* ctx->max_in_running_time, its queue is empty. In that case the only
* way to wakeup the output thread is by injecting an event in the
* queue. This usually happen with subtitle streams.
* See https://bugzilla.gnome.org/show_bug.cgi?id=763711. */
if (ctx->need_unblock) {
GST_LOG_OBJECT (ctx->sinkpad, "Sending splitmuxsink-unblock event");
event = gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM |
GST_EVENT_TYPE_SERIALIZED,
gst_structure_new ("splitmuxsink-unblock", "timestamp",
G_TYPE_INT64, splitmux->max_in_running_time, NULL));
GST_SPLITMUX_UNLOCK (splitmux);
gst_pad_send_event (ctx->sinkpad, event);
GST_SPLITMUX_LOCK (splitmux);
ctx->need_unblock = FALSE;
GST_SPLITMUX_BROADCAST_INPUT (splitmux);
/* state may have changed while we were unlocked. Loop again if so */
if (splitmux->input_state != SPLITMUX_INPUT_STATE_WAITING_GOP_COLLECT)
return;
}
if (splitmux->input_state == SPLITMUX_INPUT_STATE_WAITING_GOP_COLLECT) {
gboolean ready = TRUE;
/* Iterate each pad, and check that the input running time is at least
* up to the reference running time, and if so handle the collected GOP */
GST_LOG_OBJECT (splitmux, "Checking GOP collected, Max in running time %"
GST_STIME_FORMAT " ctx %p",
GST_STIME_ARGS (splitmux->max_in_running_time), ctx);
for (cur = g_list_first (splitmux->contexts); cur != NULL;
cur = g_list_next (cur)) {
MqStreamCtx *tmpctx = (MqStreamCtx *) (cur->data);
GST_LOG_OBJECT (splitmux,
"Context %p (src pad %" GST_PTR_FORMAT ") TS %" GST_STIME_FORMAT
" EOS %d", tmpctx, tmpctx->srcpad,
GST_STIME_ARGS (tmpctx->in_running_time), tmpctx->in_eos);
if (splitmux->max_in_running_time != GST_CLOCK_STIME_NONE &&
tmpctx->in_running_time < splitmux->max_in_running_time &&
!tmpctx->in_eos) {
GST_LOG_OBJECT (splitmux,
"Context %p (src pad %" GST_PTR_FORMAT ") not ready. We'll sleep",
tmpctx, tmpctx->srcpad);
ready = FALSE;
break;
}
}
if (ready) {
GST_DEBUG_OBJECT (splitmux,
"Collected GOP is complete. Processing (ctx %p)", ctx);
/* All pads have a complete GOP, release it into the multiqueue */
handle_gathered_gop (splitmux);
}
}
/* If upstream reached EOS we are not expecting more data, no need to wait
* here. */
if (ctx->in_eos)
return;
/* Some pad is not yet ready, or GOP is being pushed
* either way, sleep and wait to get woken */
while (splitmux->input_state == SPLITMUX_INPUT_STATE_WAITING_GOP_COLLECT &&
!ctx->flushing &&
(ctx->in_running_time >= splitmux->max_in_running_time) &&
(splitmux->max_in_running_time != GST_CLOCK_STIME_NONE)) {
GST_LOG_OBJECT (splitmux, "Sleeping for GOP collection (ctx %p)", ctx);
GST_SPLITMUX_WAIT_INPUT (splitmux);
GST_LOG_OBJECT (splitmux, "Done waiting for complete GOP (ctx %p)", ctx);
}
}
static GstPadProbeReturn
handle_mq_input (GstPad * pad, GstPadProbeInfo * info, MqStreamCtx * ctx)
{
GstSplitMuxSink *splitmux = ctx->splitmux;
GstBuffer *buf;
MqStreamBuf *buf_info = NULL;
GstClockTime ts;
gboolean loop_again;
gboolean keyframe = FALSE;
GST_LOG_OBJECT (pad, "Fired probe type 0x%x", info->type);
/* FIXME: Handle buffer lists, until then make it clear they won't work */
if (info->type & GST_PAD_PROBE_TYPE_BUFFER_LIST) {
g_warning ("Buffer list handling not implemented");
return GST_PAD_PROBE_DROP;
}
if (info->type & GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM ||
info->type & GST_PAD_PROBE_TYPE_EVENT_FLUSH) {
GstEvent *event = gst_pad_probe_info_get_event (info);
GST_LOG_OBJECT (pad, "Event %" GST_PTR_FORMAT, event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT:
gst_event_copy_segment (event, &ctx->in_segment);
break;
case GST_EVENT_FLUSH_STOP:
GST_SPLITMUX_LOCK (splitmux);
gst_segment_init (&ctx->in_segment, GST_FORMAT_UNDEFINED);
ctx->in_eos = FALSE;
ctx->in_running_time = GST_CLOCK_STIME_NONE;
GST_SPLITMUX_UNLOCK (splitmux);
break;
case GST_EVENT_EOS:
GST_SPLITMUX_LOCK (splitmux);
ctx->in_eos = TRUE;
if (splitmux->input_state == SPLITMUX_INPUT_STATE_STOPPED)
goto beach;
if (ctx->is_reference) {
GST_INFO_OBJECT (splitmux, "Got Reference EOS. Finishing up");
/* check_completed_gop will act as if this is a new keyframe with infinite timestamp */
splitmux->input_state = SPLITMUX_INPUT_STATE_WAITING_GOP_COLLECT;
/* Wake up other input pads to collect this GOP */
GST_SPLITMUX_BROADCAST_INPUT (splitmux);
check_completed_gop (splitmux, ctx);
} else if (splitmux->input_state ==
SPLITMUX_INPUT_STATE_WAITING_GOP_COLLECT) {
/* If we are waiting for a GOP to be completed (ie, for aux
* pads to catch up), then this pad is complete, so check
* if the whole GOP is.
*/
check_completed_gop (splitmux, ctx);
}
GST_SPLITMUX_UNLOCK (splitmux);
break;
case GST_EVENT_GAP:{
GstClockTime gap_ts;
GstClockTimeDiff rtime;
gst_event_parse_gap (event, &gap_ts, NULL);
if (gap_ts == GST_CLOCK_TIME_NONE)
break;
GST_SPLITMUX_LOCK (splitmux);
if (splitmux->input_state == SPLITMUX_INPUT_STATE_STOPPED)
goto beach;
rtime = my_segment_to_running_time (&ctx->in_segment, gap_ts);
GST_LOG_OBJECT (pad, "Have GAP w/ ts %" GST_STIME_FORMAT,
GST_STIME_ARGS (rtime));
if (ctx->is_reference
&& splitmux->fragment_start_time == GST_CLOCK_STIME_NONE) {
splitmux->gop_start_time = splitmux->fragment_start_time = rtime;
GST_LOG_OBJECT (splitmux, "Mux start time now %" GST_STIME_FORMAT,
GST_STIME_ARGS (splitmux->fragment_start_time));
/* Also take this as the first start time when starting up,
* so that we start counting overflow from the first frame */
if (!GST_CLOCK_STIME_IS_VALID (splitmux->max_in_running_time))
splitmux->max_in_running_time = splitmux->fragment_start_time;
}
GST_SPLITMUX_UNLOCK (splitmux);
break;
}
default:
break;
}
return GST_PAD_PROBE_PASS;
} else if (info->type & GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM) {
switch (GST_QUERY_TYPE (GST_QUERY (info->data))) {
case GST_QUERY_ALLOCATION:
return GST_PAD_PROBE_DROP;
default:
return GST_PAD_PROBE_PASS;
}
}
buf = gst_pad_probe_info_get_buffer (info);
buf_info = mq_stream_buf_new ();
if (GST_BUFFER_PTS_IS_VALID (buf))
ts = GST_BUFFER_PTS (buf);
else
ts = GST_BUFFER_DTS (buf);
GST_LOG_OBJECT (pad, "Buffer TS is %" GST_TIME_FORMAT, GST_TIME_ARGS (ts));
GST_SPLITMUX_LOCK (splitmux);
if (splitmux->input_state == SPLITMUX_INPUT_STATE_STOPPED)
goto beach;
/* If this buffer has a timestamp, advance the input timestamp of the
* stream */
if (GST_CLOCK_TIME_IS_VALID (ts)) {
GstClockTimeDiff running_time =
my_segment_to_running_time (&ctx->in_segment, ts);
GST_LOG_OBJECT (pad, "Buffer running TS is %" GST_STIME_FORMAT,
GST_STIME_ARGS (running_time));
if (GST_CLOCK_STIME_IS_VALID (running_time)
&& running_time > ctx->in_running_time)
ctx->in_running_time = running_time;
}
/* Try to make sure we have a valid running time */
if (!GST_CLOCK_STIME_IS_VALID (ctx->in_running_time)) {
ctx->in_running_time =
my_segment_to_running_time (&ctx->in_segment, ctx->in_segment.start);
}
GST_LOG_OBJECT (pad, "in running time now %" GST_STIME_FORMAT,
GST_STIME_ARGS (ctx->in_running_time));
buf_info->run_ts = ctx->in_running_time;
buf_info->buf_size = gst_buffer_get_size (buf);
buf_info->duration = GST_BUFFER_DURATION (buf);
/* initialize fragment_start_time */
if (ctx->is_reference
&& splitmux->fragment_start_time == GST_CLOCK_STIME_NONE) {
splitmux->gop_start_time = splitmux->fragment_start_time = buf_info->run_ts;
GST_LOG_OBJECT (splitmux, "Mux start time now %" GST_STIME_FORMAT,
GST_STIME_ARGS (splitmux->fragment_start_time));
gst_buffer_replace (&ctx->prev_in_keyframe, buf);
/* Also take this as the first start time when starting up,
* so that we start counting overflow from the first frame */
if (!GST_CLOCK_STIME_IS_VALID (splitmux->max_in_running_time))
splitmux->max_in_running_time = splitmux->fragment_start_time;
if (request_next_keyframe (splitmux, ctx->prev_in_keyframe) == FALSE) {
GST_WARNING_OBJECT (splitmux,
"Could not request a keyframe. Files may not split at the exact location they should");
}
gst_buffer_replace (&splitmux->reference_ctx->prev_in_keyframe, NULL);
}
GST_DEBUG_OBJECT (pad, "Buf TS %" GST_STIME_FORMAT
" total GOP bytes %" G_GUINT64_FORMAT,
GST_STIME_ARGS (buf_info->run_ts), splitmux->gop_total_bytes);
loop_again = TRUE;
do {
if (ctx->flushing)
break;
switch (splitmux->input_state) {
case SPLITMUX_INPUT_STATE_COLLECTING_GOP_START:
if (ctx->is_reference) {
/* If a keyframe, we have a complete GOP */
if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT) ||
!GST_CLOCK_STIME_IS_VALID (ctx->in_running_time) ||
splitmux->max_in_running_time >= ctx->in_running_time) {
/* Pass this buffer through */
loop_again = FALSE;
/* Allow other input pads to catch up to here too */
splitmux->max_in_running_time = ctx->in_running_time;
GST_SPLITMUX_BROADCAST_INPUT (splitmux);
break;
}
GST_INFO_OBJECT (pad,
"Have keyframe with running time %" GST_STIME_FORMAT,
GST_STIME_ARGS (ctx->in_running_time));
keyframe = TRUE;
splitmux->input_state = SPLITMUX_INPUT_STATE_WAITING_GOP_COLLECT;
splitmux->max_in_running_time = ctx->in_running_time;
/* Wake up other input pads to collect this GOP */
GST_SPLITMUX_BROADCAST_INPUT (splitmux);
check_completed_gop (splitmux, ctx);
/* Store this new keyframe to remember the start of GOP */
gst_buffer_replace (&ctx->prev_in_keyframe, buf);
} else {
/* Pass this buffer if the reference ctx is far enough ahead */
if (ctx->in_running_time < splitmux->max_in_running_time) {
loop_again = FALSE;
break;
}
/* We're still waiting for a keyframe on the reference pad, sleep */
GST_LOG_OBJECT (pad, "Sleeping for GOP start");
GST_SPLITMUX_WAIT_INPUT (splitmux);
GST_LOG_OBJECT (pad,
"Done sleeping for GOP start input state now %d",
splitmux->input_state);
}
break;
case SPLITMUX_INPUT_STATE_WAITING_GOP_COLLECT:{
/* We're collecting a GOP. If this is the reference context,
* we need to check if this is a keyframe that marks the start
* of the next GOP. If it is, it marks the end of the GOP we're
* collecting, so sleep and wait until all the other pads also
* reach that timestamp - at which point, we have an entire GOP
* and either go to ENDING_FILE or release this GOP to the muxer and
* go back to COLLECT_GOP_START. */
/* If we overran the target timestamp, it might be time to process
* the GOP, otherwise bail out for more data
*/
GST_LOG_OBJECT (pad,
"Checking TS %" GST_STIME_FORMAT " against max %"
GST_STIME_FORMAT, GST_STIME_ARGS (ctx->in_running_time),
GST_STIME_ARGS (splitmux->max_in_running_time));
if (ctx->in_running_time < splitmux->max_in_running_time) {
loop_again = FALSE;
break;
}
GST_LOG_OBJECT (pad,
"Collected last packet of GOP. Checking other pads");
check_completed_gop (splitmux, ctx);
break;
}
case SPLITMUX_INPUT_STATE_FINISHING_UP:
loop_again = FALSE;
break;
default:
loop_again = FALSE;
break;
}
}
while (loop_again);
if (keyframe) {
splitmux->queued_keyframes++;
buf_info->keyframe = TRUE;
}
/* Update total input byte counter for overflow detect */
splitmux->gop_total_bytes += buf_info->buf_size;
/* Now add this buffer to the queue just before returning */
g_queue_push_head (&ctx->queued_bufs, buf_info);
GST_LOG_OBJECT (pad, "Returning to queue buffer %" GST_PTR_FORMAT
" run ts %" GST_STIME_FORMAT, buf, GST_STIME_ARGS (ctx->in_running_time));
GST_SPLITMUX_UNLOCK (splitmux);
return GST_PAD_PROBE_PASS;
beach:
GST_SPLITMUX_UNLOCK (splitmux);
if (buf_info)
mq_stream_buf_free (buf_info);
return GST_PAD_PROBE_PASS;
}
static void
grow_blocked_queues (GstSplitMuxSink * splitmux)
{
GList *cur;
/* Scan other queues for full-ness and grow them */
for (cur = g_list_first (splitmux->contexts);
cur != NULL; cur = g_list_next (cur)) {
MqStreamCtx *tmpctx = (MqStreamCtx *) (cur->data);
guint cur_limit;
guint cur_len = g_queue_get_length (&tmpctx->queued_bufs);
g_object_get (tmpctx->q, "max-size-buffers", &cur_limit, NULL);
GST_LOG_OBJECT (tmpctx->q, "Queue len %u", cur_len);
if (cur_len >= cur_limit) {
cur_limit = cur_len + 1;
GST_DEBUG_OBJECT (tmpctx->q,
"Queue overflowed and needs enlarging. Growing to %u buffers",
cur_limit);
g_object_set (tmpctx->q, "max-size-buffers", cur_limit, NULL);
}
}
}
static void
handle_q_underrun (GstElement * q, gpointer user_data)
{
MqStreamCtx *ctx = (MqStreamCtx *) (user_data);
GstSplitMuxSink *splitmux = ctx->splitmux;
GST_SPLITMUX_LOCK (splitmux);
GST_DEBUG_OBJECT (q,
"Queue reported underrun with %d keyframes and %d cmds enqueued",
splitmux->queued_keyframes, g_queue_get_length (&splitmux->out_cmd_q));
grow_blocked_queues (splitmux);
GST_SPLITMUX_UNLOCK (splitmux);
}
static void
handle_q_overrun (GstElement * q, gpointer user_data)
{
MqStreamCtx *ctx = (MqStreamCtx *) (user_data);
GstSplitMuxSink *splitmux = ctx->splitmux;
gboolean allow_grow = FALSE;
GST_SPLITMUX_LOCK (splitmux);
GST_DEBUG_OBJECT (q,
"Queue reported overrun with %d keyframes and %d cmds enqueued",
splitmux->queued_keyframes, g_queue_get_length (&splitmux->out_cmd_q));
if (splitmux->queued_keyframes < 2) {
/* Less than a full GOP queued, grow the queue */
allow_grow = TRUE;
} else if (g_queue_get_length (&splitmux->out_cmd_q) < 1) {
allow_grow = TRUE;
} else {
/* If another queue is starved, grow */
GList *cur;
for (cur = g_list_first (splitmux->contexts);
cur != NULL; cur = g_list_next (cur)) {
MqStreamCtx *tmpctx = (MqStreamCtx *) (cur->data);
if (tmpctx != ctx && g_queue_get_length (&tmpctx->queued_bufs) < 1) {
allow_grow = TRUE;
}
}
}
GST_SPLITMUX_UNLOCK (splitmux);
if (allow_grow) {
guint cur_limit;
g_object_get (q, "max-size-buffers", &cur_limit, NULL);
cur_limit++;
GST_DEBUG_OBJECT (q,
"Queue overflowed and needs enlarging. Growing to %u buffers",
cur_limit);
g_object_set (q, "max-size-buffers", cur_limit, NULL);
}
}
static GstPad *
gst_splitmux_sink_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps)
{
GstSplitMuxSink *splitmux = (GstSplitMuxSink *) element;
GstPadTemplate *mux_template = NULL;
GstPad *res = NULL;
GstElement *q;
GstPad *q_sink = NULL, *q_src = NULL;
gchar *gname;
gboolean is_video = FALSE;
MqStreamCtx *ctx;
GST_DEBUG_OBJECT (element, "templ:%s, name:%s", templ->name_template, name);
GST_SPLITMUX_LOCK (splitmux);
if (!create_muxer (splitmux))
goto fail;
if (templ->name_template) {
if (g_str_equal (templ->name_template, "video")) {
if (splitmux->have_video)
goto already_have_video;
/* FIXME: Look for a pad template with matching caps, rather than by name */
mux_template =
gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS
(splitmux->muxer), "video_%u");
/* Fallback to find sink pad templates named 'video' (flvmux) */
if (!mux_template) {
mux_template =
gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS
(splitmux->muxer), "video");
}
is_video = TRUE;
name = NULL;
} else {
mux_template =
gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS
(splitmux->muxer), templ->name_template);
/* Fallback to find sink pad templates named 'audio' (flvmux) */
if (!mux_template) {
mux_template =
gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS
(splitmux->muxer), "audio");
name = NULL;
}
}
if (mux_template == NULL) {
/* Fallback to find sink pad templates named 'sink_%d' (mpegtsmux) */
mux_template =
gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS
(splitmux->muxer), "sink_%d");
name = NULL;
}
}
res = gst_element_request_pad (splitmux->muxer, mux_template, name, caps);
if (res == NULL)
goto fail;
if (is_video)
gname = g_strdup ("video");
else if (name == NULL)
gname = gst_pad_get_name (res);
else
gname = g_strdup (name);
if ((q = create_element (splitmux, "queue", NULL, FALSE)) == NULL)
goto fail;
gst_element_set_state (q, GST_STATE_TARGET (splitmux));
g_object_set (q, "max-size-bytes", 0, "max-size-time", (guint64) (0),
"max-size-buffers", 5, NULL);
q_sink = gst_element_get_static_pad (q, "sink");
q_src = gst_element_get_static_pad (q, "src");
if (gst_pad_link (q_src, res) != GST_PAD_LINK_OK) {
gst_element_release_request_pad (splitmux->muxer, res);
gst_object_unref (GST_OBJECT (res));
goto fail;
}
gst_object_unref (GST_OBJECT (res));
ctx = mq_stream_ctx_new (splitmux);
/* Context holds a ref: */
ctx->q = gst_object_ref (q);
ctx->srcpad = q_src;
ctx->sinkpad = q_sink;
ctx->q_overrun_id =
g_signal_connect (q, "overrun", (GCallback) handle_q_overrun, ctx);
g_signal_connect (q, "underrun", (GCallback) handle_q_underrun, ctx);
mq_stream_ctx_ref (ctx);
ctx->src_pad_block_id =
gst_pad_add_probe (q_src,
GST_PAD_PROBE_TYPE_DATA_DOWNSTREAM | GST_PAD_PROBE_TYPE_EVENT_FLUSH,
(GstPadProbeCallback) handle_mq_output, ctx, (GDestroyNotify)
_pad_block_destroy_src_notify);
if (is_video && splitmux->reference_ctx != NULL) {
splitmux->reference_ctx->is_reference = FALSE;
splitmux->reference_ctx = NULL;
}
if (splitmux->reference_ctx == NULL) {
splitmux->reference_ctx = ctx;
ctx->is_reference = TRUE;
}
res = gst_ghost_pad_new_from_template (gname, q_sink, templ);
g_object_set_qdata ((GObject *) (res), PAD_CONTEXT, ctx);
mq_stream_ctx_ref (ctx);
ctx->sink_pad_block_id =
gst_pad_add_probe (q_sink,
GST_PAD_PROBE_TYPE_DATA_DOWNSTREAM | GST_PAD_PROBE_TYPE_EVENT_FLUSH |
GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM,
(GstPadProbeCallback) handle_mq_input, ctx, (GDestroyNotify)
_pad_block_destroy_sink_notify);
GST_DEBUG_OBJECT (splitmux, "Request pad %" GST_PTR_FORMAT
" feeds queue pad %" GST_PTR_FORMAT, res, q_sink);
splitmux->contexts = g_list_prepend (splitmux->contexts, ctx);
g_free (gname);
if (is_video)
splitmux->have_video = TRUE;
gst_pad_set_active (res, TRUE);
gst_element_add_pad (element, res);
GST_SPLITMUX_UNLOCK (splitmux);
return res;
fail:
GST_SPLITMUX_UNLOCK (splitmux);
if (q_sink)
gst_object_unref (q_sink);
if (q_src)
gst_object_unref (q_src);
return NULL;
already_have_video:
GST_DEBUG_OBJECT (splitmux, "video sink pad already requested");
GST_SPLITMUX_UNLOCK (splitmux);
return NULL;
}
static void
gst_splitmux_sink_release_pad (GstElement * element, GstPad * pad)
{
GstSplitMuxSink *splitmux = (GstSplitMuxSink *) element;
GstPad *muxpad = NULL;
MqStreamCtx *ctx =
(MqStreamCtx *) (g_object_get_qdata ((GObject *) (pad), PAD_CONTEXT));
GST_SPLITMUX_LOCK (splitmux);
if (splitmux->muxer == NULL)
goto fail; /* Elements don't exist yet - nothing to release */
GST_INFO_OBJECT (pad, "releasing request pad");
muxpad = gst_pad_get_peer (ctx->srcpad);
/* Remove the context from our consideration */
splitmux->contexts = g_list_remove (splitmux->contexts, ctx);
if (ctx->sink_pad_block_id)
gst_pad_remove_probe (ctx->sinkpad, ctx->sink_pad_block_id);
if (ctx->src_pad_block_id)
gst_pad_remove_probe (ctx->srcpad, ctx->src_pad_block_id);
/* Can release the context now */
mq_stream_ctx_unref (ctx);
if (ctx == splitmux->reference_ctx)
splitmux->reference_ctx = NULL;
/* Release and free the muxer input */
if (muxpad) {
gst_element_release_request_pad (splitmux->muxer, muxpad);
gst_object_unref (muxpad);
}
if (GST_PAD_PAD_TEMPLATE (pad) &&
g_str_equal (GST_PAD_TEMPLATE_NAME_TEMPLATE (GST_PAD_PAD_TEMPLATE
(pad)), "video"))
splitmux->have_video = FALSE;
gst_element_remove_pad (element, pad);
/* Reset the internal elements only after all request pads are released */
if (splitmux->contexts == NULL)
gst_splitmux_reset (splitmux);
fail:
GST_SPLITMUX_UNLOCK (splitmux);
}
static GstElement *
create_element (GstSplitMuxSink * splitmux,
const gchar * factory, const gchar * name, gboolean locked)
{
GstElement *ret = gst_element_factory_make (factory, name);
if (ret == NULL) {
g_warning ("Failed to create %s - splitmuxsink will not work", name);
return NULL;
}
if (locked) {
/* Ensure the sink starts in locked state and NULL - it will be changed
* by the filename setting code */
gst_element_set_locked_state (ret, TRUE);
gst_element_set_state (ret, GST_STATE_NULL);
}
if (!gst_bin_add (GST_BIN (splitmux), ret)) {
g_warning ("Could not add %s element - splitmuxsink will not work", name);
gst_object_unref (ret);
return NULL;
}
return ret;
}
static gboolean
create_muxer (GstSplitMuxSink * splitmux)
{
/* Create internal elements */
if (splitmux->muxer == NULL) {
GstElement *provided_muxer = NULL;
GST_OBJECT_LOCK (splitmux);
if (splitmux->provided_muxer != NULL)
provided_muxer = gst_object_ref (splitmux->provided_muxer);
GST_OBJECT_UNLOCK (splitmux);
if (provided_muxer == NULL) {
if ((splitmux->muxer =
create_element (splitmux, "mp4mux", "muxer", FALSE)) == NULL)
goto fail;
} else {
/* Ensure it's not in locked state (we might be reusing an old element) */
gst_element_set_locked_state (provided_muxer, FALSE);
if (!gst_bin_add (GST_BIN (splitmux), provided_muxer)) {
g_warning ("Could not add muxer element - splitmuxsink will not work");
gst_object_unref (provided_muxer);
goto fail;
}
splitmux->muxer = provided_muxer;
gst_object_unref (provided_muxer);
}
}
return TRUE;
fail:
return FALSE;
}
static GstElement *
find_sink (GstElement * e)
{
GstElement *res = NULL;
GstIterator *iter;
gboolean done = FALSE;
GValue data = { 0, };
if (!GST_IS_BIN (e))
return e;
if (g_object_class_find_property (G_OBJECT_GET_CLASS (e), "location") != NULL)
return e;
iter = gst_bin_iterate_sinks (GST_BIN (e));
while (!done) {
switch (gst_iterator_next (iter, &data)) {
case GST_ITERATOR_OK:
{
GstElement *child = g_value_get_object (&data);
if (g_object_class_find_property (G_OBJECT_GET_CLASS (child),
"location") != NULL) {
res = child;
done = TRUE;
}
g_value_reset (&data);
break;
}
case GST_ITERATOR_RESYNC:
gst_iterator_resync (iter);
break;
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_ERROR:
g_assert_not_reached ();
break;
}
}
g_value_unset (&data);
gst_iterator_free (iter);
return res;
}
static gboolean
create_sink (GstSplitMuxSink * splitmux)
{
GstElement *provided_sink = NULL;
if (splitmux->active_sink == NULL) {
GST_OBJECT_LOCK (splitmux);
if (splitmux->provided_sink != NULL)
provided_sink = gst_object_ref (splitmux->provided_sink);
GST_OBJECT_UNLOCK (splitmux);
if (provided_sink == NULL) {
if ((splitmux->sink =
create_element (splitmux, DEFAULT_SINK, "sink", TRUE)) == NULL)
goto fail;
splitmux->active_sink = splitmux->sink;
} else {
/* Ensure the sink starts in locked state and NULL - it will be changed
* by the filename setting code */
gst_element_set_locked_state (provided_sink, TRUE);
gst_element_set_state (provided_sink, GST_STATE_NULL);
if (!gst_bin_add (GST_BIN (splitmux), provided_sink)) {
g_warning ("Could not add sink elements - splitmuxsink will not work");
gst_object_unref (provided_sink);
goto fail;
}
splitmux->active_sink = provided_sink;
/* The bin holds a ref now, we can drop our tmp ref */
gst_object_unref (provided_sink);
/* Find the sink element */
splitmux->sink = find_sink (splitmux->active_sink);
if (splitmux->sink == NULL) {
g_warning
("Could not locate sink element in provided sink - splitmuxsink will not work");
goto fail;
}
}
#if 1
if (g_object_class_find_property (G_OBJECT_GET_CLASS (splitmux->sink),
"async") != NULL) {
/* async child elements are causing state change races and weird
* failures, so let's try and turn that off */
g_object_set (splitmux->sink, "async", FALSE, NULL);
}
#endif
if (!gst_element_link (splitmux->muxer, splitmux->active_sink)) {
g_warning ("Failed to link muxer and sink- splitmuxsink will not work");
goto fail;
}
}
return TRUE;
fail:
return FALSE;
}
#ifdef __GNUC__
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
#endif
static void
set_next_filename (GstSplitMuxSink * splitmux, MqStreamCtx * ctx)
{
gchar *fname = NULL;
GstSample *sample;
GstCaps *caps;
gst_splitmux_sink_ensure_max_files (splitmux);
if (ctx->cur_out_buffer == NULL) {
GST_WARNING_OBJECT (splitmux, "Starting next file without buffer");
}
caps = gst_pad_get_current_caps (ctx->srcpad);
sample = gst_sample_new (ctx->cur_out_buffer, caps, &ctx->out_segment, NULL);
g_signal_emit (splitmux, signals[SIGNAL_FORMAT_LOCATION_FULL], 0,
splitmux->fragment_id, sample, &fname);
gst_sample_unref (sample);
if (caps)
gst_caps_unref (caps);
if (fname == NULL) {
/* Fallback to the old signal if the new one returned nothing */
g_signal_emit (splitmux, signals[SIGNAL_FORMAT_LOCATION], 0,
splitmux->fragment_id, &fname);
}
if (!fname)
fname = splitmux->location ?
g_strdup_printf (splitmux->location, splitmux->fragment_id) : NULL;
if (fname) {
GST_INFO_OBJECT (splitmux, "Setting file to %s", fname);
g_object_set (splitmux->sink, "location", fname, NULL);
g_free (fname);
splitmux->fragment_id++;
}
}
static void
do_async_start (GstSplitMuxSink * splitmux)
{
GstMessage *message;
if (!splitmux->need_async_start) {
GST_INFO_OBJECT (splitmux, "no async_start needed");
return;
}
splitmux->async_pending = TRUE;
GST_INFO_OBJECT (splitmux, "Sending async_start message");
message = gst_message_new_async_start (GST_OBJECT_CAST (splitmux));
GST_BIN_CLASS (parent_class)->handle_message (GST_BIN_CAST
(splitmux), message);
}
static void
do_async_done (GstSplitMuxSink * splitmux)
{
GstMessage *message;
if (splitmux->async_pending) {
GST_INFO_OBJECT (splitmux, "Sending async_done message");
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->need_async_start = FALSE;
}
static GstStateChangeReturn
gst_splitmux_sink_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstSplitMuxSink *splitmux = (GstSplitMuxSink *) element;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:{
GST_SPLITMUX_LOCK (splitmux);
if (!create_muxer (splitmux) || !create_sink (splitmux)) {
ret = GST_STATE_CHANGE_FAILURE;
GST_SPLITMUX_UNLOCK (splitmux);
goto beach;
}
GST_SPLITMUX_UNLOCK (splitmux);
splitmux->fragment_id = 0;
break;
}
case GST_STATE_CHANGE_READY_TO_PAUSED:{
GST_SPLITMUX_LOCK (splitmux);
/* Start by collecting one input on each pad */
splitmux->input_state = SPLITMUX_INPUT_STATE_COLLECTING_GOP_START;
splitmux->output_state = SPLITMUX_OUTPUT_STATE_START_NEXT_FILE;
splitmux->max_in_running_time = GST_CLOCK_STIME_NONE;
splitmux->gop_start_time = splitmux->fragment_start_time =
GST_CLOCK_STIME_NONE;
splitmux->muxed_out_bytes = 0;
splitmux->ready_for_output = FALSE;
GST_SPLITMUX_UNLOCK (splitmux);
break;
}
case GST_STATE_CHANGE_PAUSED_TO_READY:
case GST_STATE_CHANGE_READY_TO_NULL:
GST_SPLITMUX_LOCK (splitmux);
splitmux->output_state = SPLITMUX_OUTPUT_STATE_STOPPED;
splitmux->input_state = SPLITMUX_INPUT_STATE_STOPPED;
/* Wake up any blocked threads */
GST_LOG_OBJECT (splitmux,
"State change -> NULL or READY. Waking threads");
GST_SPLITMUX_BROADCAST_INPUT (splitmux);
GST_SPLITMUX_BROADCAST_OUTPUT (splitmux);
GST_SPLITMUX_UNLOCK (splitmux);
break;
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_PLAYING_TO_PAUSED:
splitmux->need_async_start = TRUE;
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:{
/* Change state async, because our child sink might not
* be ready to do that for us yet if it's state is still locked */
splitmux->need_async_start = TRUE;
/* we want to go async to PAUSED until we managed to configure and add the
* sink */
GST_SPLITMUX_LOCK (splitmux);
do_async_start (splitmux);
GST_SPLITMUX_UNLOCK (splitmux);
ret = GST_STATE_CHANGE_ASYNC;
break;
}
case GST_STATE_CHANGE_READY_TO_NULL:
GST_SPLITMUX_LOCK (splitmux);
splitmux->fragment_id = 0;
/* Reset internal elements only if no pad contexts are using them */
if (splitmux->contexts == NULL)
gst_splitmux_reset (splitmux);
do_async_done (splitmux);
GST_SPLITMUX_UNLOCK (splitmux);
break;
default:
break;
}
beach:
if (transition == GST_STATE_CHANGE_NULL_TO_READY &&
ret == GST_STATE_CHANGE_FAILURE) {
/* Cleanup elements on failed transition out of NULL */
gst_splitmux_reset (splitmux);
GST_SPLITMUX_LOCK (splitmux);
do_async_done (splitmux);
GST_SPLITMUX_UNLOCK (splitmux);
}
return ret;
}
gboolean
register_splitmuxsink (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (splitmux_debug, "splitmuxsink", 0,
"Split File Muxing Sink");
return gst_element_register (plugin, "splitmuxsink", GST_RANK_NONE,
GST_TYPE_SPLITMUX_SINK);
}
static void
gst_splitmux_sink_ensure_max_files (GstSplitMuxSink * splitmux)
{
if (splitmux->max_files && splitmux->fragment_id >= splitmux->max_files) {
splitmux->fragment_id = 0;
}
}
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