mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-22 17:51:16 +00:00
closedcaption: implement cea608muxer element
Wrapper aggregator around the CCBuffer internal utility, this version only supports aggregating CC1 and CC3 608 streams together into the s334-1a format. The element exposes CC1 and CC3 request pads. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4084>
This commit is contained in:
Mathieu Duponchelle
GStreamer Marge Bot
parent
47e97251af
commit
84d6323610
5 changed files with 486 additions and 1 deletions
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@ -5258,6 +5258,40 @@
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"rank": "none",
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"rank": "none",
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"signals": {}
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"signals": {}
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},
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},
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"cea608mux": {
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"author": "Mathieu Duponchelle <mathieu@centricular.com>",
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"description": "Combines raw 608 streams",
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"hierarchy": [
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"GstCea608Mux",
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"GstAggregator",
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"GstElement",
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"GstObject",
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"GInitiallyUnowned",
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"GObject"
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],
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"klass": "Aggregator",
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"pad-templates": {
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"cc1": {
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"caps": "closedcaption/x-cea-608:\n format: raw\n field: 0\n",
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"direction": "sink",
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"presence": "request",
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"type": "GstAggregatorPad"
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},
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"cc3": {
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"caps": "closedcaption/x-cea-608:\n format: raw\n field: 1\n",
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"direction": "sink",
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"presence": "request",
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"type": "GstAggregatorPad"
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},
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"src": {
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"caps": "closedcaption/x-cea-608:\n format: s334-1a\n framerate: { (fraction)60/1, (fraction)60000/1001, (fraction)50/1, (fraction)30/1, (fraction)30000/1001, (fraction)25/1, (fraction)24/1, (fraction)24000/1001 }\n",
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"direction": "src",
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"presence": "always",
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"type": "GstAggregatorPad"
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}
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},
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"rank": "none"
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},
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"line21decoder": {
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"line21decoder": {
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"author": "Edward Hervey <edward@centricular.com>",
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"author": "Edward Hervey <edward@centricular.com>",
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"description": "Extract line21 CC from SD video streams",
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"description": "Extract line21 CC from SD video streams",
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385
subprojects/gst-plugins-bad/ext/closedcaption/gstcea608mux.c
Normal file
385
subprojects/gst-plugins-bad/ext/closedcaption/gstcea608mux.c
Normal file
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@ -0,0 +1,385 @@
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/*
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* GStreamer
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* Copyright (C) 2023 Mathieu Duponchelle <mathieu@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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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-cea608mux
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* @title: cea608mux
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* @short_description: Combine CC1 and CC3 raw 608 streams
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*
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* ```
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* gst-launch-1.0 cea608mux name=mux ! fakesink dump=true \
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* filesrc location=one.scc ! sccparse ! closedcaption/x-cea-608 ! ccconverter ! mux. \
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* filesrc location=two.scc ! sccparse ! ccconverter ! closedcaption/x-cea-608, format=raw, field=0 ! \
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* capssetter caps="closedcaption/x-cea-608, format=raw, field=1" ! mux.
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* ```
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*
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* Since: 1.24
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <gst/gst.h>
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#include <gst/base/base.h>
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#include <gst/video/video.h>
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#include <string.h>
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#include "ccutils.h"
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#include "gstcea608mux.h"
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GST_DEBUG_CATEGORY_STATIC (gst_cea608_mux_debug);
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#define GST_CAT_DEFAULT gst_cea608_mux_debug
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static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("closedcaption/x-cea-608, format=s334-1a, "
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"framerate=(fraction){60/1, 60000/1001, 50/1, 30/1, 30000/1001, 25/1, 24/1, 24000/1001}"));
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static GstStaticPadTemplate cc1_template = GST_STATIC_PAD_TEMPLATE ("cc1",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS ("closedcaption/x-cea-608,format=raw,field=0"));
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static GstStaticPadTemplate cc3_template = GST_STATIC_PAD_TEMPLATE ("cc3",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS ("closedcaption/x-cea-608,format=raw,field=1"));
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#define parent_class gst_cea608_mux_parent_class
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G_DEFINE_TYPE (GstCea608Mux, gst_cea608_mux, GST_TYPE_AGGREGATOR);
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GST_ELEMENT_REGISTER_DEFINE (cea608mux, "cea608mux",
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GST_RANK_NONE, GST_TYPE_CEA608MUX);
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enum
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{
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PROP_0,
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};
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static void
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gst_cea608_mux_finalize (GObject * object)
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{
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GstCea608Mux *self = GST_CEA608MUX (object);
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gst_clear_object (&self->cc_buffer);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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#define GST_FLOW_NEED_DATA GST_FLOW_CUSTOM_SUCCESS
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static GstAggregatorPad *
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find_best_pad (GstAggregator * aggregator, GstClockTime * ts, gboolean timeout)
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{
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GstAggregatorPad *best = NULL;
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GstClockTime best_ts = GST_CLOCK_TIME_NONE;
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GstIterator *pads;
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GValue padptr = { 0, };
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gboolean done = FALSE;
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pads = gst_element_iterate_sink_pads (GST_ELEMENT (aggregator));
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while (!done) {
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switch (gst_iterator_next (pads, &padptr)) {
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case GST_ITERATOR_OK:{
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GstAggregatorPad *apad = g_value_get_object (&padptr);
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GstClockTime t = GST_CLOCK_TIME_NONE;
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GstBuffer *buffer;
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buffer = gst_aggregator_pad_peek_buffer (apad);
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if (!buffer) {
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if (!timeout && !GST_PAD_IS_EOS (apad)) {
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gst_object_replace ((GstObject **) & best, NULL);
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best_ts = GST_CLOCK_TIME_NONE;
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done = TRUE;
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}
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break;
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}
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if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_DTS_OR_PTS (buffer))) {
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t = gst_segment_to_running_time (&apad->segment, GST_FORMAT_TIME,
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GST_BUFFER_PTS (buffer));
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}
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if (!GST_CLOCK_TIME_IS_VALID (best_ts) ||
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(GST_CLOCK_TIME_IS_VALID (t) && t < best_ts)) {
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gst_object_replace ((GstObject **) & best, GST_OBJECT (apad));
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best_ts = t;
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}
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gst_buffer_unref (buffer);
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break;
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}
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case GST_ITERATOR_DONE:
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done = TRUE;
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break;
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case GST_ITERATOR_RESYNC:
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gst_iterator_resync (pads);
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/* Clear the best pad and start again. It might have disappeared */
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gst_object_replace ((GstObject **) & best, NULL);
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best_ts = GST_CLOCK_TIME_NONE;
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break;
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case GST_ITERATOR_ERROR:
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/* This can't happen if the parameters to gst_iterator_next() are valid */
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g_assert_not_reached ();
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break;
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}
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g_value_reset (&padptr);
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}
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g_value_unset (&padptr);
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gst_iterator_free (pads);
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if (best) {
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GST_LOG_OBJECT (aggregator,
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"Best pad found with TS %" GST_TIME_FORMAT ": %" GST_PTR_FORMAT,
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GST_TIME_ARGS (best_ts), best);
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} else {
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GST_LOG_OBJECT (aggregator, "Best pad not found");
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}
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if (ts && GST_CLOCK_TIME_IS_VALID (best_ts))
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*ts = best_ts;
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return best;
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}
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static gboolean
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all_pads_eos (GstAggregator * agg)
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{
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GList *l;
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gboolean ret = TRUE;
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GST_OBJECT_LOCK (agg);
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for (l = GST_ELEMENT_CAST (agg)->sinkpads; l; l = l->next) {
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GstAggregatorPad *pad = GST_AGGREGATOR_PAD (l->data);
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if (!gst_aggregator_pad_is_eos (pad)) {
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ret = FALSE;
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break;
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}
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}
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GST_OBJECT_UNLOCK (agg);
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return ret;
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}
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static void
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take_s334_both_fields (GstCea608Mux * self, GstBuffer * buffer)
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{
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GstMapInfo out = GST_MAP_INFO_INIT;
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guint s334_len, cc_data_len, i;
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gst_buffer_map (buffer, &out, GST_MAP_READWRITE);
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cc_data_len = out.size;
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cc_buffer_take_cc_data (self->cc_buffer, self->cdp_fps_entry, out.data,
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&cc_data_len);
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s334_len = drop_ccp_from_cc_data (out.data, cc_data_len);
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if (s334_len < 0) {
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s334_len = 0;
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goto out;
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}
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for (i = 0; i < s334_len / 3; i++) {
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guint byte = out.data[i * 3];
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/* We have to assume a line offset of 0 */
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out.data[i * 3] = (byte == 0xfc || byte == 0xf8) ? 0x80 : 0x00;
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}
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out:
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gst_buffer_unmap (buffer, &out);
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gst_buffer_set_size (buffer, s334_len);
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}
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static GstFlowReturn
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finish_s334_both_fields (GstCea608Mux * self)
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{
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GstClockTime output_pts = gst_util_uint64_scale_int (GST_SECOND,
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self->cdp_fps_entry->fps_d * self->n_output_buffers,
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self->cdp_fps_entry->fps_n);
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GstClockTime output_duration =
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gst_util_uint64_scale_int (GST_SECOND, self->cdp_fps_entry->fps_d,
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self->cdp_fps_entry->fps_n);
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GstBuffer *output = gst_buffer_new_allocate (NULL, MAX_CDP_PACKET_LEN, NULL);
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take_s334_both_fields (self, output);
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GST_BUFFER_PTS (output) = output_pts;
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GST_BUFFER_DURATION (output) = output_duration;
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GST_DEBUG_OBJECT (self, "Finishing %" GST_PTR_FORMAT, output);
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self->n_output_buffers += 1;
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return gst_aggregator_finish_buffer (GST_AGGREGATOR (self), output);
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}
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static GstFlowReturn
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gst_cea608_mux_aggregate (GstAggregator * aggregator, gboolean timeout)
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{
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GstCea608Mux *self = GST_CEA608MUX (aggregator);
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GstFlowReturn flow_ret = GST_FLOW_OK;
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GstAggregatorPad *best_pad = NULL;
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best_pad =
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find_best_pad (aggregator, &self->earliest_input_running_time, timeout);
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if (best_pad) {
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GstBuffer *buffer;
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buffer = gst_aggregator_pad_pop_buffer (GST_AGGREGATOR_PAD (best_pad));
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if (buffer) {
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GstMapInfo map;
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gst_buffer_map (buffer, &map, GST_MAP_READ);
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if (g_strcmp0 (GST_PAD_NAME (best_pad), "cc1") == 0) {
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GST_DEBUG_OBJECT (self, "Consuming CC1 %" GST_PTR_FORMAT, buffer);
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cc_buffer_push_separated (self->cc_buffer, map.data, map.size, NULL, 0,
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NULL, 0);
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} else {
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GST_DEBUG_OBJECT (self, "Consuming CC3 %" GST_PTR_FORMAT, buffer);
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cc_buffer_push_separated (self->cc_buffer, NULL, 0, map.data, map.size,
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NULL, 0);
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}
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gst_buffer_unmap (buffer, &map);
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} else {
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/* We got flushed */
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flow_ret = GST_AGGREGATOR_FLOW_NEED_DATA;
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}
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} else if (all_pads_eos (aggregator)) {
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GST_INFO_OBJECT (self, "EOS!");
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flow_ret = GST_FLOW_EOS;
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} else {
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flow_ret = GST_AGGREGATOR_FLOW_NEED_DATA;
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}
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if (flow_ret == GST_FLOW_OK) {
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GstClockTime output_pts = gst_util_uint64_scale_int (GST_SECOND,
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self->cdp_fps_entry->fps_d * self->n_output_buffers,
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self->cdp_fps_entry->fps_n);
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GstClockTime output_duration =
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gst_util_uint64_scale_int (GST_SECOND, self->cdp_fps_entry->fps_d,
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self->cdp_fps_entry->fps_n);
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if (timeout
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|| output_pts + output_duration < self->earliest_input_running_time) {
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flow_ret = finish_s334_both_fields (self);
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}
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} else if (flow_ret == GST_FLOW_EOS && !cc_buffer_is_empty (self->cc_buffer)) {
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flow_ret = finish_s334_both_fields (self);
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}
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g_clear_pointer (&best_pad, gst_object_unref);
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return flow_ret;
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}
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static gboolean
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gst_cea608_mux_stop (GstAggregator * aggregator)
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{
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GstCea608Mux *self = GST_CEA608MUX (aggregator);
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cc_buffer_discard (self->cc_buffer);
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self->n_output_buffers = 0;
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self->earliest_input_running_time = 0;
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return TRUE;
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}
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static GstFlowReturn
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||||||
|
gst_cea608_mux_flush (GstAggregator * aggregator)
|
||||||
|
{
|
||||||
|
GstCea608Mux *self = GST_CEA608MUX (aggregator);
|
||||||
|
|
||||||
|
cc_buffer_discard (self->cc_buffer);
|
||||||
|
self->n_output_buffers = 0;
|
||||||
|
self->earliest_input_running_time = 0;
|
||||||
|
|
||||||
|
return GST_FLOW_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
static gboolean
|
||||||
|
gst_cea608_mux_negotiated_src_caps (GstAggregator * agg, GstCaps * caps)
|
||||||
|
{
|
||||||
|
GstStructure *s = gst_caps_get_structure (caps, 0);
|
||||||
|
gint fps_n, fps_d;
|
||||||
|
GstCea608Mux *self = GST_CEA608MUX (agg);
|
||||||
|
GstClockTime latency;
|
||||||
|
|
||||||
|
GST_INFO_OBJECT (agg->srcpad, "set src caps: %" GST_PTR_FORMAT, caps);
|
||||||
|
|
||||||
|
g_assert (gst_structure_get_fraction (s, "framerate", &fps_n,
|
||||||
|
&fps_d) == TRUE);
|
||||||
|
self->cdp_fps_entry = cdp_fps_entry_from_fps (fps_n, fps_d);
|
||||||
|
g_assert (self->cdp_fps_entry != NULL && self->cdp_fps_entry->fps_n != 0);
|
||||||
|
|
||||||
|
latency =
|
||||||
|
gst_util_uint64_scale (GST_SECOND, self->cdp_fps_entry->fps_d,
|
||||||
|
self->cdp_fps_entry->fps_n);
|
||||||
|
gst_aggregator_set_latency (agg, latency, latency);
|
||||||
|
|
||||||
|
return TRUE;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
gst_cea608_mux_class_init (GstCea608MuxClass * klass)
|
||||||
|
{
|
||||||
|
GObjectClass *gobject_class;
|
||||||
|
GstElementClass *gstelement_class;
|
||||||
|
GstAggregatorClass *aggregator_class;
|
||||||
|
|
||||||
|
gobject_class = (GObjectClass *) klass;
|
||||||
|
gstelement_class = (GstElementClass *) klass;
|
||||||
|
aggregator_class = (GstAggregatorClass *) klass;
|
||||||
|
|
||||||
|
gobject_class->finalize = gst_cea608_mux_finalize;
|
||||||
|
|
||||||
|
gst_element_class_set_static_metadata (gstelement_class,
|
||||||
|
"Closed Caption Muxer",
|
||||||
|
"Aggregator",
|
||||||
|
"Combines raw 608 streams",
|
||||||
|
"Mathieu Duponchelle <mathieu@centricular.com>");
|
||||||
|
|
||||||
|
gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
|
||||||
|
&srctemplate, GST_TYPE_AGGREGATOR_PAD);
|
||||||
|
gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
|
||||||
|
&cc1_template, GST_TYPE_AGGREGATOR_PAD);
|
||||||
|
gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
|
||||||
|
&cc3_template, GST_TYPE_AGGREGATOR_PAD);
|
||||||
|
|
||||||
|
aggregator_class->aggregate = gst_cea608_mux_aggregate;
|
||||||
|
aggregator_class->stop = gst_cea608_mux_stop;
|
||||||
|
aggregator_class->flush = gst_cea608_mux_flush;
|
||||||
|
aggregator_class->negotiated_src_caps = gst_cea608_mux_negotiated_src_caps;
|
||||||
|
aggregator_class->get_next_time = gst_aggregator_simple_get_next_time;
|
||||||
|
|
||||||
|
GST_DEBUG_CATEGORY_INIT (gst_cea608_mux_debug, "cea608mux",
|
||||||
|
0, "Closed Caption muxer");
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
gst_cea608_mux_init (GstCea608Mux * self)
|
||||||
|
{
|
||||||
|
self->cc_buffer = cc_buffer_new ();
|
||||||
|
cc_buffer_set_max_buffer_time (self->cc_buffer, GST_CLOCK_TIME_NONE);
|
||||||
|
cc_buffer_set_output_padding (self->cc_buffer, TRUE);
|
||||||
|
self->cdp_fps_entry = &null_fps_entry;
|
||||||
|
}
|
||||||
64
subprojects/gst-plugins-bad/ext/closedcaption/gstcea608mux.h
Normal file
64
subprojects/gst-plugins-bad/ext/closedcaption/gstcea608mux.h
Normal file
|
|
@ -0,0 +1,64 @@
|
||||||
|
/*
|
||||||
|
* GStreamer
|
||||||
|
* Copyright (C) 2023 Mathieu Duponchelle <mathieu@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.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __GST_CEA608MUX_H__
|
||||||
|
#define __GST_CEA608MUX_H__
|
||||||
|
|
||||||
|
#include <gst/gst.h>
|
||||||
|
#include <gst/base/base.h>
|
||||||
|
|
||||||
|
#include "ccutils.h"
|
||||||
|
|
||||||
|
G_BEGIN_DECLS
|
||||||
|
#define GST_TYPE_CEA608MUX \
|
||||||
|
(gst_cea608_mux_get_type())
|
||||||
|
#define GST_CEA608MUX(obj) \
|
||||||
|
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CEA608MUX,GstCea608Mux))
|
||||||
|
#define GST_CEA608MUX_CLASS(klass) \
|
||||||
|
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CEA608MUX,GstCea608MuxClass))
|
||||||
|
#define GST_IS_CEA608MUX(obj) \
|
||||||
|
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CEA608MUX))
|
||||||
|
#define GST_IS_CEA608MUX_CLASS(klass) \
|
||||||
|
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CEA608MUX))
|
||||||
|
|
||||||
|
typedef struct _GstCea608Mux GstCea608Mux;
|
||||||
|
typedef struct _GstCea608MuxClass GstCea608MuxClass;
|
||||||
|
|
||||||
|
struct _GstCea608Mux
|
||||||
|
{
|
||||||
|
GstAggregator parent;
|
||||||
|
|
||||||
|
CCBuffer *cc_buffer;
|
||||||
|
GstClockTime earliest_input_running_time;
|
||||||
|
gint n_output_buffers;
|
||||||
|
const struct cdp_fps_entry *cdp_fps_entry;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct _GstCea608MuxClass
|
||||||
|
{
|
||||||
|
GstAggregatorClass parent_class;
|
||||||
|
};
|
||||||
|
|
||||||
|
GType gst_cea608_mux_get_type (void);
|
||||||
|
|
||||||
|
GST_ELEMENT_REGISTER_DECLARE (cea608mux);
|
||||||
|
|
||||||
|
G_END_DECLS
|
||||||
|
#endif /* __GST_CEA608MUX_H__ */
|
||||||
|
|
@ -28,6 +28,7 @@
|
||||||
#include "gstcccombiner.h"
|
#include "gstcccombiner.h"
|
||||||
#include "gstccconverter.h"
|
#include "gstccconverter.h"
|
||||||
#include "gstccextractor.h"
|
#include "gstccextractor.h"
|
||||||
|
#include "gstcea608mux.h"
|
||||||
#include "gstline21dec.h"
|
#include "gstline21dec.h"
|
||||||
#include "gstceaccoverlay.h"
|
#include "gstceaccoverlay.h"
|
||||||
#include "gstline21enc.h"
|
#include "gstline21enc.h"
|
||||||
|
|
@ -42,6 +43,7 @@ closedcaption_init (GstPlugin * plugin)
|
||||||
"Closed caption utilities");
|
"Closed caption utilities");
|
||||||
|
|
||||||
ret |= GST_ELEMENT_REGISTER (cccombiner, plugin);
|
ret |= GST_ELEMENT_REGISTER (cccombiner, plugin);
|
||||||
|
ret |= GST_ELEMENT_REGISTER (cea608mux, plugin);
|
||||||
ret |= GST_ELEMENT_REGISTER (ccconverter, plugin);
|
ret |= GST_ELEMENT_REGISTER (ccconverter, plugin);
|
||||||
ret |= GST_ELEMENT_REGISTER (ccextractor, plugin);
|
ret |= GST_ELEMENT_REGISTER (ccextractor, plugin);
|
||||||
ret |= GST_ELEMENT_REGISTER (line21decoder, plugin);
|
ret |= GST_ELEMENT_REGISTER (line21decoder, plugin);
|
||||||
|
|
|
||||||
|
|
@ -11,7 +11,7 @@ zvbi_sources = [
|
||||||
|
|
||||||
if closedcaption_dep.found()
|
if closedcaption_dep.found()
|
||||||
gstclosedcaption = library('gstclosedcaption',
|
gstclosedcaption = library('gstclosedcaption',
|
||||||
'gstcccombiner.c', 'gstccextractor.c', 'gstccconverter.c', 'gstclosedcaption.c',
|
'gstcccombiner.c', 'gstccextractor.c', 'gstccconverter.c', 'gstcea608mux.c', 'gstclosedcaption.c',
|
||||||
'gstline21dec.c', 'gstcea708decoder.c', 'gstceaccoverlay.c', 'gstline21enc.c', 'ccutils.c',
|
'gstline21dec.c', 'gstcea708decoder.c', 'gstceaccoverlay.c', 'gstline21enc.c', 'ccutils.c',
|
||||||
zvbi_sources,
|
zvbi_sources,
|
||||||
c_args : gst_plugins_bad_args,
|
c_args : gst_plugins_bad_args,
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue