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mpegtsmux: Add SCTE-35 support
This adds two properties: * scte-35-pid: If not 0, enables the SCTE-35 support for the current program. This will write the proper PMT and send SCTE-35 NULL commands (i.e. heartbeats) at a regular interval * scte-35-null-interval: This specifies the interval at which the NULL commands should be sent Sending SCTE-35 commands is done by creating the appropriate SCTE-35 GstMpegtsSection and then sending them on the muxer. See the associated example
This commit is contained in:
Edward Hervey
Edward Hervey
parent
6a9108884c
commit
ef16d7558f
8 changed files with 342 additions and 11 deletions
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@ -1,9 +1,11 @@
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/*
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* gst-scte-section.h -
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* Copyright (C) 2013, CableLabs, Louisville, CO 80027
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* (c) 2019, Centricular ltd
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*
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* Authors:
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* RUIH Team <ruih@cablelabs.com>
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* Edward Hervey <edward@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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@ -195,8 +195,12 @@ enum
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PROP_SI_INTERVAL,
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PROP_BITRATE,
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PROP_PCR_INTERVAL,
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PROP_SCTE_35_PID,
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PROP_SCTE_35_NULL_INTERVAL
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};
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#define DEFAULT_SCTE_35_PID 0
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#define BASETSMUX_DEFAULT_ALIGNMENT -1
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#define CLOCK_BASE 9LL
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@ -726,8 +730,11 @@ gst_base_ts_mux_create_streams (GstBaseTsMux * mux)
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if (ts_pad->prog == NULL)
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goto no_program;
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tsmux_set_pmt_interval (ts_pad->prog, mux->pmt_interval);
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g_hash_table_insert (mux->programs,
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GINT_TO_POINTER (ts_pad->prog_id), ts_pad->prog);
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tsmux_program_set_scte35_pid (ts_pad->prog, mux->scte35_pid);
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tsmux_program_set_scte35_interval (ts_pad->prog,
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mux->scte35_null_interval);
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g_hash_table_insert (mux->programs, GINT_TO_POINTER (ts_pad->prog_id),
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ts_pad->prog);
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}
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if (ts_pad->stream == NULL) {
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@ -1052,6 +1059,7 @@ gst_base_ts_mux_aggregate_buffer (GstBaseTsMux * mux,
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gint64 dts = GST_CLOCK_STIME_NONE;
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gboolean delta = TRUE, header = FALSE;
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StreamData *stream_data;
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GstMpegtsSection *scte_section = NULL;
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GST_DEBUG_OBJECT (mux, "Pads collected");
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@ -1128,6 +1136,16 @@ gst_base_ts_mux_aggregate_buffer (GstBaseTsMux * mux,
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GST_DEBUG_OBJECT (best, "Chose stream for output (PID: 0x%04x)", best->pid);
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GST_OBJECT_LOCK (mux);
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scte_section = mux->pending_scte35_section;
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mux->pending_scte35_section = NULL;
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GST_OBJECT_UNLOCK (mux);
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if (G_UNLIKELY (scte_section)) {
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GST_DEBUG_OBJECT (mux, "Sending pending SCTE section");
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if (!tsmux_send_section (mux->tsmux, scte_section))
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GST_ERROR_OBJECT (mux, "Error sending SCTE section !");
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}
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if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_PTS (buf))) {
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pts = GSTTIME_TO_MPEGTIME (GST_BUFFER_PTS (buf));
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GST_DEBUG_OBJECT (mux, "Buffer has PTS %" GST_TIME_FORMAT " pts %"
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@ -1249,8 +1267,18 @@ gst_base_ts_mux_send_event (GstElement * element, GstEvent * event)
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if (section) {
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GST_DEBUG ("Received event with mpegts section");
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/* TODO: Check that the section type is supported */
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tsmux_add_mpegts_si_section (mux->tsmux, section);
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if (section->section_type == GST_MPEGTS_SECTION_SCTE_SIT) {
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/* Will be sent from the streaming threads */
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GST_DEBUG_OBJECT (mux, "Storing SCTE event");
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GST_OBJECT_LOCK (element);
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if (mux->pending_scte35_section)
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gst_mpegts_section_unref (mux->pending_scte35_section);
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mux->pending_scte35_section = section;
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GST_OBJECT_UNLOCK (element);
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} else {
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/* TODO: Check that the section type is supported */
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tsmux_add_mpegts_si_section (mux->tsmux, section);
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}
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gst_event_unref (event);
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@ -1710,6 +1738,12 @@ gst_base_ts_mux_set_property (GObject * object, guint prop_id,
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if (mux->tsmux)
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tsmux_set_pcr_interval (mux->tsmux, mux->pcr_interval);
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break;
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case PROP_SCTE_35_PID:
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mux->scte35_pid = g_value_get_uint (value);
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break;
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case PROP_SCTE_35_NULL_INTERVAL:
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mux->scte35_null_interval = g_value_get_uint (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -1744,6 +1778,12 @@ gst_base_ts_mux_get_property (GObject * object, guint prop_id,
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case PROP_PCR_INTERVAL:
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g_value_set_uint (value, mux->pcr_interval);
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break;
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case PROP_SCTE_35_PID:
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g_value_set_uint (value, mux->scte35_pid);
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break;
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case PROP_SCTE_35_NULL_INTERVAL:
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g_value_set_uint (value, mux->scte35_null_interval);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -1878,6 +1918,20 @@ gst_base_ts_mux_class_init (GstBaseTsMuxClass * klass)
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1, G_MAXUINT, TSMUX_DEFAULT_PCR_INTERVAL,
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(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SCTE_35_PID,
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g_param_spec_uint ("scte-35-pid", "SCTE-35 PID",
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"PID to use for inserting SCTE-35 packets (0: unused)",
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0, G_MAXUINT, DEFAULT_SCTE_35_PID,
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(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
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g_object_class_install_property (G_OBJECT_CLASS (klass),
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PROP_SCTE_35_NULL_INTERVAL, g_param_spec_uint ("scte-35-null-interval",
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"SCTE-35 NULL packet interval",
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"Set the interval (in ticks of the 90kHz clock) for writing SCTE-35 NULL (heartbeat) packets."
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" (only valid if scte-35-pid is different from 0)", 1, G_MAXUINT,
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TSMUX_DEFAULT_SCTE_35_NULL_INTERVAL,
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(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
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gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
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&gst_base_ts_mux_src_factory, GST_TYPE_AGGREGATOR_PAD);
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}
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@ -1895,6 +1949,8 @@ gst_base_ts_mux_init (GstBaseTsMux * mux)
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mux->prog_map = NULL;
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mux->alignment = BASETSMUX_DEFAULT_ALIGNMENT;
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mux->bitrate = TSMUX_DEFAULT_BITRATE;
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mux->scte35_pid = DEFAULT_SCTE_35_PID;
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mux->scte35_null_interval = TSMUX_DEFAULT_SCTE_35_NULL_INTERVAL;
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mux->packet_size = GST_BASE_TS_MUX_NORMAL_PACKET_LENGTH;
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mux->automatic_alignment = 0;
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@ -174,11 +174,14 @@ struct GstBaseTsMux {
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guint si_interval;
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guint64 bitrate;
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guint pcr_interval;
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guint scte35_pid;
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guint scte35_null_interval;
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/* state */
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gboolean first;
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GstClockTime pending_key_unit_ts;
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GstEvent *force_key_unit_event;
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GstMpegtsSection *pending_scte35_section;
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/* write callback handling/state */
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GstFlowReturn last_flow_ret;
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@ -112,6 +112,7 @@
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static gboolean tsmux_write_pat (TsMux * mux);
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static gboolean tsmux_write_pmt (TsMux * mux, TsMuxProgram * program);
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static gboolean tsmux_write_scte_null (TsMux * mux, TsMuxProgram * program);
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static void
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tsmux_section_free (TsMuxSection * section)
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{
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@ -361,6 +362,7 @@ tsmux_add_mpegts_si_section (TsMux * mux, GstMpegtsSection * section)
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return TRUE;
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}
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/**
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* tsmux_free:
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* @mux: a #TsMux
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@ -451,6 +453,11 @@ tsmux_program_new (TsMux * mux, gint prog_id)
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program->pmt_pid = mux->next_pmt_pid++;
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program->pcr_stream = NULL;
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/* SCTE35 is disabled by default */
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program->scte35_pid = 0;
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program->scte35_null_interval = TSMUX_DEFAULT_SCTE_35_NULL_INTERVAL;
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program->next_scte35_pcr = -1;
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program->streams = g_array_sized_new (FALSE, TRUE, sizeof (TsMuxStream *), 1);
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mux->programs = g_list_prepend (mux->programs, program);
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@ -495,6 +502,22 @@ tsmux_get_pmt_interval (TsMuxProgram * program)
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return program->pmt_interval;
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}
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/**
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* tsmux_program_set_scte35_interval:
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* @program: a #TsMuxProgram
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* @freq: a new SCTE-35 NULL interval
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*
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* Set the interval (in cycles of the 90kHz clock) for sending out the SCTE-35
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* NULL command. This is only effective is the SCTE-35 PID is not 0.
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*/
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void
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tsmux_program_set_scte35_interval (TsMuxProgram * program, guint interval)
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{
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g_return_if_fail (program != NULL);
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program->scte35_null_interval = interval;
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}
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/**
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* tsmux_resend_pmt:
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* @program: a #TsMuxProgram
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@ -509,6 +532,55 @@ tsmux_resend_pmt (TsMuxProgram * program)
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program->next_pmt_pcr = -1;
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}
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/**
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* tsmux_program_set_scte35_pid:
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* @program: a #TsMuxProgram
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* @pid: The pid to use, or 0 to deactivate usage.
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*
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* Set the @pid to use for sending SCTE-35 packets on the given
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* @program.
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*
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* This needs to be called as early as possible if SCTE-35 sections
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* are even going to be used with the given @program so that the PMT
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* can be properly configured.
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*/
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void
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tsmux_program_set_scte35_pid (TsMuxProgram * program, guint16 pid)
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{
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TsMuxSection *section;
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GstMpegtsSCTESIT *sit;
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g_return_if_fail (program != NULL);
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program->scte35_pid = pid;
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/* Create/Update the section */
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if (program->scte35_null_section) {
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tsmux_section_free (program->scte35_null_section);
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program->scte35_null_section = NULL;
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}
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if (pid != 0) {
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program->scte35_null_section = section = g_slice_new0 (TsMuxSection);
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section->pi.pid = pid;
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sit = gst_mpegts_scte_null_new ();
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section->section = gst_mpegts_section_from_scte_sit (sit, pid);
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}
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}
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/**
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* tsmux_program_get_scte35_pid:
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* @program: a #TsMuxProgram
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*
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* Get the PID configured for sending SCTE-35 packets.
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*
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* Returns: the configured SCTE-35 PID, or 0 if not active.
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*/
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guint16
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tsmux_program_get_scte35_pid (TsMuxProgram * program)
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{
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g_return_val_if_fail (program != NULL, 0);
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return program->scte35_pid;
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}
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/**
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* tsmux_program_add_stream:
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* @program: a #TsMuxProgram
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@ -931,8 +1003,9 @@ tsmux_write_ts_header (TsMux * mux, guint8 * buf, TsMuxPacketInfo * pi,
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return TRUE;
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}
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/* The unused_arg is needed for g_hash_table_foreach() */
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static gboolean
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tsmux_section_write_packet (GstMpegtsSectionType * type,
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tsmux_section_write_packet (gpointer unused_arg,
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TsMuxSection * section, TsMux * mux)
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{
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GstBuffer *section_buffer;
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@ -1056,6 +1129,38 @@ fail:
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return FALSE;
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}
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/**
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* tsmux_send_section:
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* @mux: a #TsMux
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* @section: (transfer full): a #GstMpegtsSection to add
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*
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* Send a @section immediately on the stream.
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*
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* Returns: %TRUE on success, %FALSE otherwise
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*/
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gboolean
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tsmux_send_section (TsMux * mux, GstMpegtsSection * section)
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{
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gboolean ret;
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TsMuxSection tsmux_section;
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g_return_val_if_fail (mux != NULL, FALSE);
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g_return_val_if_fail (section != NULL, FALSE);
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memset (&tsmux_section, 0, sizeof (tsmux_section));
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GST_DEBUG ("Sending mpegts section with type %d to mux",
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section->section_type);
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tsmux_section.section = section;
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tsmux_section.pi.pid = section->pid;
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ret = tsmux_section_write_packet (NULL, &tsmux_section, mux);
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gst_mpegts_section_unref (section);
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return ret;
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}
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static gboolean
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tsmux_write_si (TsMux * mux)
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{
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@ -1183,6 +1288,31 @@ rewrite_si (TsMux * mux, gint64 cur_ts)
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cur_pcr = get_current_pcr (mux, cur_ts);
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}
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if (program->scte35_pid != 0) {
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gboolean write_scte_null = FALSE;
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if (program->next_scte35_pcr == -1)
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write_scte_null = TRUE;
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else if (cur_pcr > program->next_scte35_pcr)
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write_scte_null = TRUE;
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if (write_scte_null) {
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GST_DEBUG ("next scte35 pcr %" G_GINT64_FORMAT,
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program->next_scte35_pcr);
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if (program->next_scte35_pcr == -1)
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program->next_scte35_pcr =
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cur_pcr + program->scte35_null_interval * 300;
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else
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program->next_scte35_pcr += program->scte35_null_interval * 300;
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GST_DEBUG ("next scte35 NOW pcr %" G_GINT64_FORMAT,
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program->next_scte35_pcr);
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if (!tsmux_write_scte_null (mux, program))
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return FALSE;
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cur_pcr = get_current_pcr (mux, cur_ts);
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}
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}
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}
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return TRUE;
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@ -1358,6 +1488,8 @@ tsmux_program_free (TsMuxProgram * program)
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/* Free PMT section */
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if (program->pmt.section)
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gst_mpegts_section_unref (program->pmt.section);
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if (program->scte35_null_section)
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tsmux_section_free (program->scte35_null_section);
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g_array_free (program->streams, TRUE);
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g_slice_free (TsMuxProgram, program);
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@ -1403,8 +1535,7 @@ tsmux_write_pat (TsMux * mux)
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mux->pat_changed = FALSE;
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}
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return tsmux_section_write_packet (GINT_TO_POINTER (GST_MPEGTS_SECTION_PAT),
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&mux->pat, mux);
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return tsmux_section_write_packet (NULL, &mux->pat, mux);
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}
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static gboolean
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@ -1459,6 +1590,12 @@ tsmux_write_pmt (TsMux * mux, TsMuxProgram * program)
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g_ptr_array_add (pmt->descriptors, descriptor);
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#endif
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/* Will SCTE-35 be potentially used ? */
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if (program->scte35_pid != 0) {
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descriptor = gst_mpegts_descriptor_from_registration ("CUEI", NULL, 0);
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g_ptr_array_add (pmt->descriptors, descriptor);
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}
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/* Write out the entries */
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for (i = 0; i < program->streams->len; i++) {
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GstMpegtsPMTStream *pmt_stream;
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@ -1475,6 +1612,14 @@ tsmux_write_pmt (TsMux * mux, TsMuxProgram * program)
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g_ptr_array_add (pmt->streams, pmt_stream);
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}
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/* Will SCTE-35 be potentially used ? */
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if (program->scte35_pid != 0) {
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GstMpegtsPMTStream *pmt_stream = gst_mpegts_pmt_stream_new ();
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pmt_stream->stream_type = GST_MPEGTS_STREAM_TYPE_SCTE_SIT;
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pmt_stream->pid = program->scte35_pid;
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g_ptr_array_add (pmt->streams, pmt_stream);
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}
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TS_DEBUG ("PMT for program %d has %d streams",
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program->pgm_number, program->streams->len);
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@ -1490,8 +1635,15 @@ tsmux_write_pmt (TsMux * mux, TsMuxProgram * program)
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program->pmt.section->version_number = program->pmt_version++;
|
||||
}
|
||||
|
||||
return tsmux_section_write_packet (GINT_TO_POINTER (GST_MPEGTS_SECTION_PMT),
|
||||
&program->pmt, mux);
|
||||
return tsmux_section_write_packet (NULL, &program->pmt, mux);
|
||||
}
|
||||
|
||||
static gboolean
|
||||
tsmux_write_scte_null (TsMux * mux, TsMuxProgram * program)
|
||||
{
|
||||
/* SCTE-35 NULL section is created when PID is set */
|
||||
GST_LOG ("Writing SCTE NULL packet");
|
||||
return tsmux_section_write_packet (NULL, program->scte35_null_section, mux);
|
||||
}
|
||||
|
||||
void
|
||||
|
|
|
|||
|
|
@ -128,6 +128,14 @@ struct TsMuxProgram {
|
|||
/* PID to write the PMT */
|
||||
guint16 pmt_pid;
|
||||
|
||||
TsMuxSection *scte35_null_section;
|
||||
/* SCTE-35 pid (0 if inactive/unused) */
|
||||
guint16 scte35_pid;
|
||||
/* Interval between SCTE-35 NULL packets in MPEG PTS clock time */
|
||||
guint scte35_null_interval;
|
||||
/* Next SCTE-35 position, 27 MHz */
|
||||
gint64 next_scte35_pcr;
|
||||
|
||||
/* stream which carries the PCR */
|
||||
TsMuxStream *pcr_stream;
|
||||
|
||||
|
|
@ -214,6 +222,10 @@ void tsmux_program_free (TsMuxProgram *program);
|
|||
void tsmux_set_pmt_interval (TsMuxProgram *program, guint interval);
|
||||
guint tsmux_get_pmt_interval (TsMuxProgram *program);
|
||||
void tsmux_resend_pmt (TsMuxProgram *program);
|
||||
void tsmux_program_set_scte35_pid (TsMuxProgram *program, guint16 pid);
|
||||
guint16 tsmux_program_get_scte35_pid (TsMuxProgram *program);
|
||||
void tsmux_program_set_scte35_interval (TsMuxProgram *mux, guint interval);
|
||||
|
||||
|
||||
/* SI table management */
|
||||
void tsmux_set_si_interval (TsMux *mux, guint interval);
|
||||
|
|
@ -221,6 +233,9 @@ guint tsmux_get_si_interval (TsMux *mux);
|
|||
void tsmux_resend_si (TsMux *mux);
|
||||
gboolean tsmux_add_mpegts_si_section (TsMux * mux, GstMpegtsSection * section);
|
||||
|
||||
/* One-time sections */
|
||||
gboolean tsmux_send_section (TsMux *mux, GstMpegtsSection *section);
|
||||
|
||||
/* stream management */
|
||||
TsMuxStream * tsmux_create_stream (TsMux *mux, guint stream_type, guint16 pid, gchar *language);
|
||||
TsMuxStream * tsmux_find_stream (TsMux *mux, guint16 pid);
|
||||
|
|
|
|||
|
|
@ -123,6 +123,8 @@ G_BEGIN_DECLS
|
|||
#define TSMUX_DEFAULT_SI_INTERVAL (TSMUX_CLOCK_FREQ / 10)
|
||||
/* PCR interval (1/25th sec) */
|
||||
#define TSMUX_DEFAULT_PCR_INTERVAL (TSMUX_CLOCK_FREQ / 25)
|
||||
/* SCTE-35 NULL Interval (5mins) */
|
||||
#define TSMUX_DEFAULT_SCTE_35_NULL_INTERVAL (TSMUX_CLOCK_FREQ * 300)
|
||||
/* Bitrate (bits per second) */
|
||||
#define TSMUX_DEFAULT_BITRATE 0
|
||||
|
||||
|
|
|
|||
|
|
@ -1,4 +1,4 @@
|
|||
foreach fname : ['ts-parser.c', 'ts-section-writer.c']
|
||||
foreach fname : ['ts-parser.c', 'ts-section-writer.c', 'ts-scte-writer.c']
|
||||
exe_name = fname.split('.').get(0).underscorify()
|
||||
|
||||
executable(exe_name,
|
||||
|
|
|
|||
101
tests/examples/mpegts/ts-scte-writer.c
Normal file
101
tests/examples/mpegts/ts-scte-writer.c
Normal file
|
|
@ -0,0 +1,101 @@
|
|||
#include <gst/gst.h>
|
||||
#include <gst/mpegts/mpegts.h>
|
||||
|
||||
/* 45s stream
|
||||
* Send scte-35 NULL packets every 5s
|
||||
* Use PID 123 for SCTE-35 */
|
||||
#define PIPELINE_STR "videotestsrc is-live=True num-buffers=1350 ! video/x-raw,framerate=30/1 ! x264enc tune=zerolatency ! queue ! mpegtsmux name=mux scte-35-pid=123 scte-35-null-interval=450000 ! filesink location=test-scte.ts"
|
||||
|
||||
static void
|
||||
_on_bus_message (GstBus * bus, GstMessage * message, GMainLoop * mainloop)
|
||||
{
|
||||
switch (GST_MESSAGE_TYPE (message)) {
|
||||
case GST_MESSAGE_ERROR:
|
||||
case GST_MESSAGE_EOS:
|
||||
g_main_loop_quit (mainloop);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
send_splice (GstElement * mux, gboolean out)
|
||||
{
|
||||
GstMpegtsSCTESIT *sit;
|
||||
GstMpegtsSection *section;
|
||||
|
||||
g_print ("Sending Splice %s event\n", out ? "Out" : "In");
|
||||
|
||||
/* Splice is at 5s for 30s */
|
||||
if (out)
|
||||
sit = gst_mpegts_scte_splice_out_new (1, 5 * 90000, 30 * 90000);
|
||||
else
|
||||
sit = gst_mpegts_scte_splice_in_new (2, 35 * 90000);
|
||||
|
||||
section = gst_mpegts_section_from_scte_sit (sit, 123);
|
||||
gst_mpegts_section_send_event (section, mux);
|
||||
gst_mpegts_section_unref (section);
|
||||
}
|
||||
|
||||
static gboolean
|
||||
send_splice_in (GstElement * mux)
|
||||
{
|
||||
send_splice (mux, FALSE);
|
||||
|
||||
return G_SOURCE_REMOVE;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
send_splice_out (GstElement * mux)
|
||||
{
|
||||
send_splice (mux, TRUE);
|
||||
|
||||
/* In 30s send the splice-in one */
|
||||
g_timeout_add_seconds (30, (GSourceFunc) send_splice_in, mux);
|
||||
|
||||
return G_SOURCE_REMOVE;
|
||||
}
|
||||
|
||||
int
|
||||
main (int argc, char **argv)
|
||||
{
|
||||
GstElement *pipeline = NULL;
|
||||
GError *error = NULL;
|
||||
GstBus *bus;
|
||||
GMainLoop *mainloop;
|
||||
GstElement *mux;
|
||||
|
||||
gst_init (&argc, &argv);
|
||||
gst_mpegts_initialize ();
|
||||
|
||||
pipeline = gst_parse_launch (PIPELINE_STR, &error);
|
||||
if (error) {
|
||||
g_print ("pipeline could not be constructed: %s\n", error->message);
|
||||
g_clear_error (&error);
|
||||
return 1;
|
||||
}
|
||||
|
||||
mainloop = g_main_loop_new (NULL, FALSE);
|
||||
|
||||
mux = gst_bin_get_by_name (GST_BIN (pipeline), "mux");
|
||||
/* Send splice-out 1s in */
|
||||
g_timeout_add_seconds (1, (GSourceFunc) send_splice_out, mux);
|
||||
gst_object_unref (mux);
|
||||
|
||||
/* Put a bus handler */
|
||||
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
|
||||
gst_bus_add_signal_watch (bus);
|
||||
g_signal_connect (bus, "message", (GCallback) _on_bus_message, mainloop);
|
||||
|
||||
/* Start pipeline */
|
||||
gst_element_set_state (pipeline, GST_STATE_PLAYING);
|
||||
g_main_loop_run (mainloop);
|
||||
|
||||
gst_element_set_state (pipeline, GST_STATE_NULL);
|
||||
|
||||
gst_object_unref (pipeline);
|
||||
gst_object_unref (bus);
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in a new issue