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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Don't chain up to src_query() from sink_query() method, and returned caps by gst_static_pad_template_get_caps() needs to be cleared. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1513>
720 lines
23 KiB
C
720 lines
23 KiB
C
/*
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* GStreamer
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* Copyright (C) 2018 Sebastian Dröge <sebastian@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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#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 "gstcccombiner.h"
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GST_DEBUG_CATEGORY_STATIC (gst_cc_combiner_debug);
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#define GST_CAT_DEFAULT gst_cc_combiner_debug
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static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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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_ANY);
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static GstStaticPadTemplate captiontemplate =
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GST_STATIC_PAD_TEMPLATE ("caption",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS
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("closedcaption/x-cea-608,format={ (string) raw, (string) s334-1a}; "
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"closedcaption/x-cea-708,format={ (string) cc_data, (string) cdp }"));
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G_DEFINE_TYPE (GstCCCombiner, gst_cc_combiner, GST_TYPE_AGGREGATOR);
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#define parent_class gst_cc_combiner_parent_class
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typedef struct
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{
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GstVideoCaptionType caption_type;
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GstBuffer *buffer;
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} CaptionData;
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static void
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caption_data_clear (CaptionData * data)
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{
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gst_buffer_unref (data->buffer);
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}
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static void
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gst_cc_combiner_finalize (GObject * object)
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{
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GstCCCombiner *self = GST_CCCOMBINER (object);
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g_array_unref (self->current_frame_captions);
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self->current_frame_captions = NULL;
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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 GstFlowReturn
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gst_cc_combiner_collect_captions (GstCCCombiner * self, gboolean timeout)
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{
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GstAggregatorPad *src_pad =
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GST_AGGREGATOR_PAD (GST_AGGREGATOR_SRC_PAD (self));
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GstAggregatorPad *caption_pad;
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GstBuffer *video_buf;
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g_assert (self->current_video_buffer != NULL);
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caption_pad =
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GST_AGGREGATOR_PAD_CAST (gst_element_get_static_pad (GST_ELEMENT_CAST
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(self), "caption"));
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/* No caption pad, forward buffer directly */
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if (!caption_pad) {
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GST_LOG_OBJECT (self, "No caption pad, passing through video");
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video_buf = self->current_video_buffer;
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self->current_video_buffer = NULL;
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gst_aggregator_selected_samples (GST_AGGREGATOR_CAST (self),
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GST_BUFFER_PTS (video_buf), GST_BUFFER_DTS (video_buf),
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GST_BUFFER_DURATION (video_buf), NULL);
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goto done;
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}
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GST_LOG_OBJECT (self, "Trying to collect captions for queued video buffer");
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do {
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GstBuffer *caption_buf;
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GstClockTime caption_time;
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CaptionData caption_data;
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caption_buf = gst_aggregator_pad_peek_buffer (caption_pad);
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if (!caption_buf) {
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if (gst_aggregator_pad_is_eos (caption_pad)) {
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GST_DEBUG_OBJECT (self, "Caption pad is EOS, we're done");
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break;
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} else if (!timeout) {
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GST_DEBUG_OBJECT (self, "Need more caption data");
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gst_object_unref (caption_pad);
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return GST_FLOW_NEED_DATA;
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} else {
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GST_DEBUG_OBJECT (self, "No caption data on timeout");
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break;
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}
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}
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caption_time = GST_BUFFER_PTS (caption_buf);
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if (!GST_CLOCK_TIME_IS_VALID (caption_time)) {
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GST_ERROR_OBJECT (self, "Caption buffer without PTS");
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gst_buffer_unref (caption_buf);
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gst_object_unref (caption_pad);
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return GST_FLOW_ERROR;
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}
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caption_time =
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gst_segment_to_running_time (&caption_pad->segment, GST_FORMAT_TIME,
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caption_time);
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if (!GST_CLOCK_TIME_IS_VALID (caption_time)) {
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GST_DEBUG_OBJECT (self, "Caption buffer outside segment, dropping");
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gst_aggregator_pad_drop_buffer (caption_pad);
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gst_buffer_unref (caption_buf);
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continue;
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}
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if (gst_buffer_get_size (caption_buf) == 0 &&
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GST_BUFFER_FLAG_IS_SET (caption_buf, GST_BUFFER_FLAG_GAP)) {
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/* This is a gap, we can go ahead. We only consume it once its end point
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* is behind the current video running time. Important to note that
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* we can't deal with gaps with no duration (-1)
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*/
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if (!GST_CLOCK_TIME_IS_VALID (GST_BUFFER_DURATION (caption_buf))) {
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GST_ERROR_OBJECT (self, "GAP buffer without a duration");
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gst_buffer_unref (caption_buf);
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gst_object_unref (caption_pad);
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return GST_FLOW_ERROR;
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}
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gst_buffer_unref (caption_buf);
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if (caption_time + GST_BUFFER_DURATION (caption_buf) <
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self->current_video_running_time_end) {
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gst_aggregator_pad_drop_buffer (caption_pad);
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continue;
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} else {
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break;
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}
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}
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/* Collected all caption buffers for this video buffer */
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if (caption_time >= self->current_video_running_time_end) {
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gst_buffer_unref (caption_buf);
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break;
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} else if (GST_CLOCK_TIME_IS_VALID (self->previous_video_running_time_end)) {
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if (caption_time < self->previous_video_running_time_end) {
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GST_WARNING_OBJECT (self,
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"Caption buffer before end of last video frame, dropping");
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gst_aggregator_pad_drop_buffer (caption_pad);
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gst_buffer_unref (caption_buf);
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continue;
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}
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} else if (caption_time < self->current_video_running_time) {
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GST_WARNING_OBJECT (self,
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"Caption buffer before current video frame, dropping");
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gst_aggregator_pad_drop_buffer (caption_pad);
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gst_buffer_unref (caption_buf);
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continue;
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}
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/* This caption buffer has to be collected */
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GST_LOG_OBJECT (self,
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"Collecting caption buffer %p %" GST_TIME_FORMAT " for video buffer %p",
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caption_buf, GST_TIME_ARGS (caption_time), self->current_video_buffer);
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caption_data.caption_type = self->current_caption_type;
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caption_data.buffer = caption_buf;
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g_array_append_val (self->current_frame_captions, caption_data);
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gst_aggregator_pad_drop_buffer (caption_pad);
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} while (TRUE);
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gst_aggregator_selected_samples (GST_AGGREGATOR_CAST (self),
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GST_BUFFER_PTS (self->current_video_buffer),
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GST_BUFFER_DTS (self->current_video_buffer),
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GST_BUFFER_DURATION (self->current_video_buffer), NULL);
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if (self->current_frame_captions->len > 0) {
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guint i;
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GST_LOG_OBJECT (self, "Attaching %u captions to buffer %p",
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self->current_frame_captions->len, self->current_video_buffer);
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video_buf = gst_buffer_make_writable (self->current_video_buffer);
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self->current_video_buffer = NULL;
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for (i = 0; i < self->current_frame_captions->len; i++) {
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CaptionData *caption_data =
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&g_array_index (self->current_frame_captions, CaptionData, i);
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GstMapInfo map;
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gst_buffer_map (caption_data->buffer, &map, GST_MAP_READ);
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gst_buffer_add_video_caption_meta (video_buf, caption_data->caption_type,
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map.data, map.size);
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gst_buffer_unmap (caption_data->buffer, &map);
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}
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g_array_set_size (self->current_frame_captions, 0);
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} else {
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GST_LOG_OBJECT (self, "No captions for buffer %p",
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self->current_video_buffer);
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video_buf = self->current_video_buffer;
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self->current_video_buffer = NULL;
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}
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gst_object_unref (caption_pad);
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done:
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src_pad->segment.position =
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GST_BUFFER_PTS (video_buf) + GST_BUFFER_DURATION (video_buf);
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return gst_aggregator_finish_buffer (GST_AGGREGATOR_CAST (self), video_buf);
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}
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static GstFlowReturn
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gst_cc_combiner_aggregate (GstAggregator * aggregator, gboolean timeout)
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{
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GstCCCombiner *self = GST_CCCOMBINER (aggregator);
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GstFlowReturn flow_ret = GST_FLOW_OK;
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/* If we have no current video buffer, queue one. If we have one but
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* its end running time is not known yet, try to determine it from the
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* next video buffer */
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if (!self->current_video_buffer
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|| !GST_CLOCK_TIME_IS_VALID (self->current_video_running_time_end)) {
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GstAggregatorPad *video_pad;
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GstClockTime video_start;
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GstBuffer *video_buf;
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video_pad =
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GST_AGGREGATOR_PAD_CAST (gst_element_get_static_pad (GST_ELEMENT_CAST
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(aggregator), "sink"));
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video_buf = gst_aggregator_pad_peek_buffer (video_pad);
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if (!video_buf) {
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if (gst_aggregator_pad_is_eos (video_pad)) {
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GST_DEBUG_OBJECT (aggregator, "Video pad is EOS, we're done");
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/* Assume that this buffer ends where it started +50ms (25fps) and handle it */
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if (self->current_video_buffer) {
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self->current_video_running_time_end =
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self->current_video_running_time + 50 * GST_MSECOND;
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flow_ret = gst_cc_combiner_collect_captions (self, timeout);
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}
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/* If we collected all captions for the remaining video frame we're
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* done, otherwise get called another time and go directly into the
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* outer branch for finishing the current video frame */
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if (flow_ret == GST_FLOW_NEED_DATA)
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flow_ret = GST_FLOW_OK;
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else
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flow_ret = GST_FLOW_EOS;
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} else {
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flow_ret = GST_FLOW_OK;
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}
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gst_object_unref (video_pad);
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return flow_ret;
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}
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video_start = GST_BUFFER_PTS (video_buf);
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if (!GST_CLOCK_TIME_IS_VALID (video_start)) {
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gst_buffer_unref (video_buf);
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gst_object_unref (video_pad);
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GST_ERROR_OBJECT (aggregator, "Video buffer without PTS");
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return GST_FLOW_ERROR;
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}
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video_start =
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gst_segment_to_running_time (&video_pad->segment, GST_FORMAT_TIME,
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video_start);
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if (!GST_CLOCK_TIME_IS_VALID (video_start)) {
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GST_DEBUG_OBJECT (aggregator, "Buffer outside segment, dropping");
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gst_aggregator_pad_drop_buffer (video_pad);
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gst_buffer_unref (video_buf);
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gst_object_unref (video_pad);
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return GST_FLOW_OK;
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}
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if (self->current_video_buffer) {
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/* If we already have a video buffer just update the current end running
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* time accordingly. That's what was missing and why we got here */
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self->current_video_running_time_end = video_start;
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gst_buffer_unref (video_buf);
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GST_LOG_OBJECT (self,
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"Determined end timestamp for video buffer: %p %" GST_TIME_FORMAT
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" - %" GST_TIME_FORMAT, self->current_video_buffer,
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GST_TIME_ARGS (self->current_video_running_time),
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GST_TIME_ARGS (self->current_video_running_time_end));
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} else {
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/* Otherwise we had no buffer queued currently. Let's do that now
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* so that we can collect captions for it */
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gst_buffer_replace (&self->current_video_buffer, video_buf);
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self->current_video_running_time = video_start;
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gst_aggregator_pad_drop_buffer (video_pad);
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gst_buffer_unref (video_buf);
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if (GST_BUFFER_DURATION_IS_VALID (video_buf)) {
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GstClockTime end_time =
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GST_BUFFER_PTS (video_buf) + GST_BUFFER_DURATION (video_buf);
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if (video_pad->segment.stop != -1 && end_time > video_pad->segment.stop)
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end_time = video_pad->segment.stop;
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self->current_video_running_time_end =
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gst_segment_to_running_time (&video_pad->segment, GST_FORMAT_TIME,
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end_time);
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} else if (self->video_fps_n != 0 && self->video_fps_d != 0) {
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GstClockTime end_time =
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GST_BUFFER_PTS (video_buf) + gst_util_uint64_scale_int (GST_SECOND,
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self->video_fps_d, self->video_fps_n);
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if (video_pad->segment.stop != -1 && end_time > video_pad->segment.stop)
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end_time = video_pad->segment.stop;
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self->current_video_running_time_end =
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gst_segment_to_running_time (&video_pad->segment, GST_FORMAT_TIME,
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end_time);
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} else {
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self->current_video_running_time_end = GST_CLOCK_TIME_NONE;
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}
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GST_LOG_OBJECT (self,
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"Queued new video buffer: %p %" GST_TIME_FORMAT " - %"
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GST_TIME_FORMAT, self->current_video_buffer,
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GST_TIME_ARGS (self->current_video_running_time),
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GST_TIME_ARGS (self->current_video_running_time_end));
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}
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gst_object_unref (video_pad);
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}
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/* At this point we have a video buffer queued and can start collecting
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* caption buffers for it */
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g_assert (self->current_video_buffer != NULL);
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g_assert (GST_CLOCK_TIME_IS_VALID (self->current_video_running_time));
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g_assert (GST_CLOCK_TIME_IS_VALID (self->current_video_running_time_end));
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flow_ret = gst_cc_combiner_collect_captions (self, timeout);
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/* Only if we collected all captions we replace the current video buffer
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* with NULL and continue with the next one on the next call */
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if (flow_ret == GST_FLOW_NEED_DATA) {
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flow_ret = GST_FLOW_OK;
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} else {
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gst_buffer_replace (&self->current_video_buffer, NULL);
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self->previous_video_running_time_end =
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self->current_video_running_time_end;
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self->current_video_running_time = self->current_video_running_time_end =
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GST_CLOCK_TIME_NONE;
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}
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return flow_ret;
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}
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static gboolean
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gst_cc_combiner_sink_event (GstAggregator * aggregator,
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GstAggregatorPad * agg_pad, GstEvent * event)
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{
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GstCCCombiner *self = GST_CCCOMBINER (aggregator);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_CAPS:{
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GstCaps *caps;
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GstStructure *s;
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gst_event_parse_caps (event, &caps);
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s = gst_caps_get_structure (caps, 0);
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if (strcmp (GST_OBJECT_NAME (agg_pad), "caption") == 0) {
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self->current_caption_type = gst_video_caption_type_from_caps (caps);
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} else {
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gint fps_n, fps_d;
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fps_n = fps_d = 0;
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gst_structure_get_fraction (s, "framerate", &fps_n, &fps_d);
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if (fps_n != self->video_fps_n || fps_d != self->video_fps_d) {
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GstClockTime latency;
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latency = gst_util_uint64_scale (GST_SECOND, fps_d, fps_n);
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gst_aggregator_set_latency (aggregator, latency, latency);
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}
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self->video_fps_n = fps_n;
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self->video_fps_d = fps_d;
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gst_aggregator_set_src_caps (aggregator, caps);
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}
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break;
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}
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case GST_EVENT_SEGMENT:{
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if (strcmp (GST_OBJECT_NAME (agg_pad), "sink") == 0) {
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const GstSegment *segment;
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gst_event_parse_segment (event, &segment);
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gst_aggregator_update_segment (aggregator, segment);
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}
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break;
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}
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default:
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break;
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}
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return GST_AGGREGATOR_CLASS (parent_class)->sink_event (aggregator, agg_pad,
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event);
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}
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static gboolean
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gst_cc_combiner_stop (GstAggregator * aggregator)
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{
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GstCCCombiner *self = GST_CCCOMBINER (aggregator);
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self->video_fps_n = self->video_fps_d = 0;
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self->current_video_running_time = self->current_video_running_time_end =
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self->previous_video_running_time_end = GST_CLOCK_TIME_NONE;
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gst_buffer_replace (&self->current_video_buffer, NULL);
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g_array_set_size (self->current_frame_captions, 0);
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self->current_caption_type = GST_VIDEO_CAPTION_TYPE_UNKNOWN;
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return TRUE;
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}
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static GstFlowReturn
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gst_cc_combiner_flush (GstAggregator * aggregator)
|
|
{
|
|
GstCCCombiner *self = GST_CCCOMBINER (aggregator);
|
|
GstAggregatorPad *src_pad =
|
|
GST_AGGREGATOR_PAD (GST_AGGREGATOR_SRC_PAD (aggregator));
|
|
|
|
self->current_video_running_time = self->current_video_running_time_end =
|
|
self->previous_video_running_time_end = GST_CLOCK_TIME_NONE;
|
|
gst_buffer_replace (&self->current_video_buffer, NULL);
|
|
|
|
g_array_set_size (self->current_frame_captions, 0);
|
|
|
|
src_pad->segment.position = GST_CLOCK_TIME_NONE;
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static GstAggregatorPad *
|
|
gst_cc_combiner_create_new_pad (GstAggregator * aggregator,
|
|
GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
|
|
{
|
|
GstCCCombiner *self = GST_CCCOMBINER (aggregator);
|
|
GstAggregatorPad *agg_pad;
|
|
|
|
if (templ->direction != GST_PAD_SINK)
|
|
return NULL;
|
|
|
|
if (templ->presence != GST_PAD_REQUEST)
|
|
return NULL;
|
|
|
|
if (strcmp (templ->name_template, "caption") != 0)
|
|
return NULL;
|
|
|
|
GST_OBJECT_LOCK (self);
|
|
agg_pad = g_object_new (GST_TYPE_AGGREGATOR_PAD,
|
|
"name", "caption", "direction", GST_PAD_SINK, "template", templ, NULL);
|
|
self->current_caption_type = GST_VIDEO_CAPTION_TYPE_UNKNOWN;
|
|
GST_OBJECT_UNLOCK (self);
|
|
|
|
return agg_pad;
|
|
}
|
|
|
|
static gboolean
|
|
gst_cc_combiner_src_query (GstAggregator * aggregator, GstQuery * query)
|
|
{
|
|
GstPad *video_sinkpad =
|
|
gst_element_get_static_pad (GST_ELEMENT_CAST (aggregator), "sink");
|
|
gboolean ret;
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_POSITION:
|
|
case GST_QUERY_DURATION:
|
|
case GST_QUERY_URI:
|
|
case GST_QUERY_CAPS:
|
|
case GST_QUERY_ALLOCATION:
|
|
ret = gst_pad_peer_query (video_sinkpad, query);
|
|
break;
|
|
case GST_QUERY_ACCEPT_CAPS:{
|
|
GstCaps *caps;
|
|
GstCaps *templ = gst_static_pad_template_get_caps (&srctemplate);
|
|
|
|
gst_query_parse_accept_caps (query, &caps);
|
|
gst_query_set_accept_caps_result (query, gst_caps_is_subset (caps,
|
|
templ));
|
|
gst_caps_unref (templ);
|
|
ret = TRUE;
|
|
break;
|
|
}
|
|
default:
|
|
ret = GST_AGGREGATOR_CLASS (parent_class)->src_query (aggregator, query);
|
|
break;
|
|
}
|
|
|
|
gst_object_unref (video_sinkpad);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_cc_combiner_sink_query (GstAggregator * aggregator,
|
|
GstAggregatorPad * aggpad, GstQuery * query)
|
|
{
|
|
GstPad *video_sinkpad =
|
|
gst_element_get_static_pad (GST_ELEMENT_CAST (aggregator), "sink");
|
|
GstPad *srcpad = GST_AGGREGATOR_SRC_PAD (aggregator);
|
|
|
|
gboolean ret;
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_POSITION:
|
|
case GST_QUERY_DURATION:
|
|
case GST_QUERY_URI:
|
|
case GST_QUERY_ALLOCATION:
|
|
if (GST_PAD_CAST (aggpad) == video_sinkpad) {
|
|
ret = gst_pad_peer_query (srcpad, query);
|
|
} else {
|
|
ret =
|
|
GST_AGGREGATOR_CLASS (parent_class)->sink_query (aggregator,
|
|
aggpad, query);
|
|
}
|
|
break;
|
|
case GST_QUERY_CAPS:
|
|
if (GST_PAD_CAST (aggpad) == video_sinkpad) {
|
|
ret = gst_pad_peer_query (srcpad, query);
|
|
} else {
|
|
GstCaps *filter;
|
|
GstCaps *templ = gst_static_pad_template_get_caps (&captiontemplate);
|
|
|
|
gst_query_parse_caps (query, &filter);
|
|
|
|
if (filter) {
|
|
GstCaps *caps =
|
|
gst_caps_intersect_full (filter, templ, GST_CAPS_INTERSECT_FIRST);
|
|
gst_query_set_caps_result (query, caps);
|
|
gst_caps_unref (caps);
|
|
} else {
|
|
gst_query_set_caps_result (query, templ);
|
|
}
|
|
gst_caps_unref (templ);
|
|
ret = TRUE;
|
|
}
|
|
break;
|
|
case GST_QUERY_ACCEPT_CAPS:
|
|
if (GST_PAD_CAST (aggpad) == video_sinkpad) {
|
|
ret = gst_pad_peer_query (srcpad, query);
|
|
} else {
|
|
GstCaps *caps;
|
|
GstCaps *templ = gst_static_pad_template_get_caps (&captiontemplate);
|
|
|
|
gst_query_parse_accept_caps (query, &caps);
|
|
gst_query_set_accept_caps_result (query, gst_caps_is_subset (caps,
|
|
templ));
|
|
gst_caps_unref (templ);
|
|
ret = TRUE;
|
|
}
|
|
break;
|
|
default:
|
|
ret = GST_AGGREGATOR_CLASS (parent_class)->sink_query (aggregator,
|
|
aggpad, query);
|
|
break;
|
|
}
|
|
|
|
gst_object_unref (video_sinkpad);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstSample *
|
|
gst_cc_combiner_peek_next_sample (GstAggregator * agg,
|
|
GstAggregatorPad * aggpad)
|
|
{
|
|
GstAggregatorPad *caption_pad, *video_pad;
|
|
GstCCCombiner *self = GST_CCCOMBINER (agg);
|
|
GstSample *res = NULL;
|
|
|
|
caption_pad =
|
|
GST_AGGREGATOR_PAD_CAST (gst_element_get_static_pad (GST_ELEMENT_CAST
|
|
(self), "caption"));
|
|
video_pad =
|
|
GST_AGGREGATOR_PAD_CAST (gst_element_get_static_pad (GST_ELEMENT_CAST
|
|
(self), "sink"));
|
|
|
|
if (aggpad == caption_pad) {
|
|
if (self->current_frame_captions->len > 0) {
|
|
GstCaps *caps = gst_pad_get_current_caps (GST_PAD (aggpad));
|
|
GstBufferList *buflist = gst_buffer_list_new ();
|
|
guint i;
|
|
|
|
for (i = 0; i < self->current_frame_captions->len; i++) {
|
|
CaptionData *caption_data =
|
|
&g_array_index (self->current_frame_captions, CaptionData, i);
|
|
gst_buffer_list_add (buflist, gst_buffer_ref (caption_data->buffer));
|
|
}
|
|
|
|
res = gst_sample_new (NULL, caps, &aggpad->segment, NULL);
|
|
gst_caps_unref (caps);
|
|
|
|
gst_sample_set_buffer_list (res, buflist);
|
|
gst_buffer_list_unref (buflist);
|
|
}
|
|
} else if (aggpad == video_pad) {
|
|
if (self->current_video_buffer) {
|
|
GstCaps *caps = gst_pad_get_current_caps (GST_PAD (aggpad));
|
|
res = gst_sample_new (self->current_video_buffer,
|
|
caps, &aggpad->segment, NULL);
|
|
gst_caps_unref (caps);
|
|
}
|
|
}
|
|
|
|
if (caption_pad)
|
|
gst_object_unref (caption_pad);
|
|
|
|
if (video_pad)
|
|
gst_object_unref (video_pad);
|
|
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
gst_cc_combiner_class_init (GstCCCombinerClass * 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_cc_combiner_finalize;
|
|
|
|
gst_element_class_set_static_metadata (gstelement_class,
|
|
"Closed Caption Combiner",
|
|
"Filter",
|
|
"Combines GstVideoCaptionMeta with video input stream",
|
|
"Sebastian Dröge <sebastian@centricular.com>");
|
|
|
|
gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
|
|
&sinktemplate, GST_TYPE_AGGREGATOR_PAD);
|
|
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,
|
|
&captiontemplate, GST_TYPE_AGGREGATOR_PAD);
|
|
|
|
aggregator_class->aggregate = gst_cc_combiner_aggregate;
|
|
aggregator_class->stop = gst_cc_combiner_stop;
|
|
aggregator_class->flush = gst_cc_combiner_flush;
|
|
aggregator_class->create_new_pad = gst_cc_combiner_create_new_pad;
|
|
aggregator_class->sink_event = gst_cc_combiner_sink_event;
|
|
aggregator_class->negotiate = NULL;
|
|
aggregator_class->get_next_time = gst_aggregator_simple_get_next_time;
|
|
aggregator_class->src_query = gst_cc_combiner_src_query;
|
|
aggregator_class->sink_query = gst_cc_combiner_sink_query;
|
|
aggregator_class->peek_next_sample = gst_cc_combiner_peek_next_sample;
|
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_cc_combiner_debug, "cccombiner",
|
|
0, "Closed Caption combiner");
|
|
}
|
|
|
|
static void
|
|
gst_cc_combiner_init (GstCCCombiner * self)
|
|
{
|
|
GstPadTemplate *templ;
|
|
GstAggregatorPad *agg_pad;
|
|
|
|
templ = gst_static_pad_template_get (&sinktemplate);
|
|
agg_pad = g_object_new (GST_TYPE_AGGREGATOR_PAD,
|
|
"name", "sink", "direction", GST_PAD_SINK, "template", templ, NULL);
|
|
gst_object_unref (templ);
|
|
gst_element_add_pad (GST_ELEMENT_CAST (self), GST_PAD_CAST (agg_pad));
|
|
|
|
self->current_frame_captions =
|
|
g_array_new (FALSE, FALSE, sizeof (CaptionData));
|
|
g_array_set_clear_func (self->current_frame_captions,
|
|
(GDestroyNotify) caption_data_clear);
|
|
|
|
self->current_video_running_time = self->current_video_running_time_end =
|
|
self->previous_video_running_time_end = GST_CLOCK_TIME_NONE;
|
|
|
|
self->current_caption_type = GST_VIDEO_CAPTION_TYPE_UNKNOWN;
|
|
}
|