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dwrite: Add dwritesubtitlemux element

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dwrite plugin internal use and will be removed once it's added to -base

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4934>
This commit is contained in:
Seungha Yang 2023-06-27 21:31:42 +09:00 committed by GStreamer Marge Bot
parent fce6edd0f1
commit 0091166a38
4 changed files with 784 additions and 0 deletions
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subprojects/gst-plugins-bad/sys/dwrite/gstdwritesubtitlemux.cpp Normal file
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/* GStreamer
* Copyright (C) 2023 Seungha Yang <seungha@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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/video/video.h>
#include "gstdwritesubtitlemux.h"
#include "gstdwrite-utils.h"
GST_DEBUG_CATEGORY_STATIC (dwrite_subtitle_mux_debug);
#define GST_CAT_DEFAULT dwrite_subtitle_mux_debug
static GstStaticPadTemplate video_templ = GST_STATIC_PAD_TEMPLATE ("video",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw(ANY)"));
static GstStaticPadTemplate text_templ = GST_STATIC_PAD_TEMPLATE ("text_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("text/x-raw"));
static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw(ANY)")
);
enum
{
PROP_PAD_0,
PROP_PAD_ACTIVE,
};
struct _GstSubtitleMuxPad
{
GstAggregatorPad parent;
GMutex lock;
gchar *stream_id;
GstBuffer *buffer;
GstStream *stream;
GstStream *pending_stream;
GstClockTime start_time;
GstClockTime end_time;
gboolean active;
};
static void gst_dwrite_subtitle_mux_pad_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_dwrite_subtitle_mux_pad_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_dwrite_subtitle_mux_pad_dispose (GObject * object);
static void gst_dwrite_subtitle_mux_pad_finalize (GObject * object);
static GstFlowReturn
gst_dwrite_subtitle_mux_pad_flush (GstAggregatorPad * aggpad,
GstAggregator * agg);
#define gst_dwrite_subtitle_mux_pad_parent_class pad_parent_class
G_DEFINE_TYPE (GstSubtitleMuxPad, gst_dwrite_subtitle_mux_pad,
GST_TYPE_AGGREGATOR_PAD);
static void
gst_dwrite_subtitle_mux_pad_class_init (GstSubtitleMuxPadClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstAggregatorPadClass *pad_class = GST_AGGREGATOR_PAD_CLASS (klass);
object_class->dispose = gst_dwrite_subtitle_mux_pad_dispose;
object_class->finalize = gst_dwrite_subtitle_mux_pad_finalize;
object_class->set_property = gst_dwrite_subtitle_mux_pad_set_property;
object_class->get_property = gst_dwrite_subtitle_mux_pad_get_property;
g_object_class_install_property (object_class,
PROP_PAD_ACTIVE, g_param_spec_boolean ("active", "Active",
"Active state of the pad. If FALSE, subtitle from this pad will be"
"be ignored", TRUE,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
pad_class->flush = GST_DEBUG_FUNCPTR (gst_dwrite_subtitle_mux_pad_flush);
}
static void
gst_dwrite_subtitle_mux_pad_init (GstSubtitleMuxPad * self)
{
self->start_time = GST_CLOCK_TIME_NONE;
self->end_time = GST_CLOCK_TIME_NONE;
self->active = TRUE;
g_mutex_init (&self->lock);
}
static void
gst_dwrite_subtitle_mux_pad_dispose (GObject * object)
{
GstSubtitleMuxPad *self = GST_DWRITE_SUBTITLE_MUX_PAD (object);
gst_clear_buffer (&self->buffer);
gst_clear_object (&self->stream);
gst_clear_object (&self->pending_stream);
G_OBJECT_CLASS (pad_parent_class)->dispose (object);
}
static void
gst_dwrite_subtitle_mux_pad_finalize (GObject * object)
{
GstSubtitleMuxPad *self = GST_DWRITE_SUBTITLE_MUX_PAD (object);
g_free (self->stream_id);
g_mutex_clear (&self->lock);
G_OBJECT_CLASS (pad_parent_class)->finalize (object);
}
static void
gst_dwrite_subtitle_mux_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstSubtitleMuxPad *self = GST_DWRITE_SUBTITLE_MUX_PAD (object);
g_mutex_lock (&self->lock);
switch (prop_id) {
case PROP_PAD_ACTIVE:
self->active = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
g_mutex_unlock (&self->lock);
}
static void
gst_dwrite_subtitle_mux_pad_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstSubtitleMuxPad *self = GST_DWRITE_SUBTITLE_MUX_PAD (object);
g_mutex_lock (&self->lock);
switch (prop_id) {
case PROP_PAD_ACTIVE:
g_value_set_boolean (value, self->active);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
g_mutex_unlock (&self->lock);
}
static GstFlowReturn
gst_dwrite_subtitle_mux_pad_flush (GstAggregatorPad * aggpad,
GstAggregator * agg)
{
GstSubtitleMuxPad *self = GST_DWRITE_SUBTITLE_MUX_PAD (aggpad);
gst_clear_buffer (&self->buffer);
self->start_time = GST_CLOCK_TIME_NONE;
self->end_time = GST_CLOCK_TIME_NONE;
return GST_FLOW_OK;
}
struct _GstSubtitleMux
{
GstAggregator parent;
GstSubtitleMuxPad *video_pad;
};
static GstPad *gst_dwrite_subtitle_mux_request_new_pad (GstElement * elem,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
static gboolean gst_dwrite_subtitle_mux_sink_query (GstAggregator * agg,
GstAggregatorPad * pad, GstQuery * query);
static gboolean gst_dwrite_subtitle_mux_src_query (GstAggregator * agg,
GstQuery * query);
static gboolean gst_dwrite_subtitle_mux_sink_event (GstAggregator * agg,
GstAggregatorPad * pad, GstEvent * event);
static GstFlowReturn gst_dwrite_subtitle_mux_aggregate (GstAggregator * agg,
gboolean timeout);
#define gst_dwrite_subtitle_mux_parent_class parent_class
G_DEFINE_TYPE (GstSubtitleMux, gst_dwrite_subtitle_mux, GST_TYPE_AGGREGATOR);
static void
gst_dwrite_subtitle_mux_class_init (GstSubtitleMuxClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstAggregatorClass *agg_class = GST_AGGREGATOR_CLASS (klass);
element_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_dwrite_subtitle_mux_request_new_pad);
gst_element_class_set_static_metadata (element_class,
"DirectWrite Subtitle Mux", "Generic",
"Attach subtitle metas on video buffers",
"Seungha Yang <seungha@centricular.com>");
gst_element_class_add_static_pad_template_with_gtype (element_class,
&video_templ, GST_TYPE_DWRITE_SUBTITLE_MUX_PAD);
gst_element_class_add_static_pad_template_with_gtype (element_class,
&text_templ, GST_TYPE_DWRITE_SUBTITLE_MUX_PAD);
gst_element_class_add_static_pad_template_with_gtype (element_class,
&src_templ, GST_TYPE_AGGREGATOR_PAD);
agg_class->sink_query =
GST_DEBUG_FUNCPTR (gst_dwrite_subtitle_mux_sink_query);
agg_class->src_query = GST_DEBUG_FUNCPTR (gst_dwrite_subtitle_mux_src_query);
agg_class->sink_event =
GST_DEBUG_FUNCPTR (gst_dwrite_subtitle_mux_sink_event);
agg_class->aggregate = GST_DEBUG_FUNCPTR (gst_dwrite_subtitle_mux_aggregate);
agg_class->get_next_time =
GST_DEBUG_FUNCPTR (gst_aggregator_simple_get_next_time);
agg_class->negotiate = NULL;
gst_type_mark_as_plugin_api (GST_TYPE_DWRITE_SUBTITLE_MUX_PAD,
(GstPluginAPIFlags) 0);
GST_DEBUG_CATEGORY_INIT (dwrite_subtitle_mux_debug,
"dwritesubtitlemux", 0, "dwritesubtitlemux");
}
static void
gst_dwrite_subtitle_mux_init (GstSubtitleMux * self)
{
GstElement *elem = GST_ELEMENT_CAST (self);
GstElementClass *klass = GST_ELEMENT_GET_CLASS (elem);
GstAggregator *agg = GST_AGGREGATOR_CAST (self);
GstPadTemplate *templ;
GstPad *video_pad;
templ = gst_element_class_get_pad_template (klass, "video");
video_pad = gst_pad_new_from_template (templ, "video");
gst_element_add_pad (elem, video_pad);
self->video_pad = GST_DWRITE_SUBTITLE_MUX_PAD (video_pad);
gst_aggregator_set_force_live (agg, TRUE);
}
static GstPad *
gst_dwrite_subtitle_mux_request_new_pad (GstElement * elem,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps)
{
GstPad *pad;
pad = GST_ELEMENT_CLASS (parent_class)->request_new_pad (elem,
templ, name, caps);
if (!pad)
return NULL;
GST_PAD_SET_ACCEPT_INTERSECT (pad);
GST_PAD_SET_ACCEPT_TEMPLATE (pad);
return pad;
}
static gboolean
gst_dwrite_subtitle_mux_sink_query (GstAggregator * agg, GstAggregatorPad * pad,
GstQuery * query)
{
GstSubtitleMux *self = GST_DWRITE_SUBTITLE_MUX (agg);
GstSubtitleMuxPad *spad = GST_DWRITE_SUBTITLE_MUX_PAD (pad);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_ALLOCATION:
if (spad == self->video_pad) {
guint i = 0;
guint n_allocation;
guint down_min = 0;
if (!gst_pad_peer_query (agg->srcpad, query))
return FALSE;
/* We need one more video buffer. Update pool size */
n_allocation = gst_query_get_n_allocation_pools (query);
while (i < n_allocation) {
GstBufferPool *pool = NULL;
guint size, min, max;
gst_query_parse_nth_allocation_pool (query,
i, &pool, &size, &min, &max);
if (min == max) {
if (pool)
gst_object_unref (pool);
gst_query_remove_nth_allocation_pool (query, i);
n_allocation--;
down_min = MAX (min, down_min);
continue;
}
gst_query_set_nth_allocation_pool (query,
i, pool, size, min + 1, max);
if (pool)
gst_object_unref (pool);
i++;
}
if (n_allocation == 0) {
GstCaps *caps;
GstVideoInfo info;
gst_query_parse_allocation (query, &caps, NULL);
gst_video_info_from_caps (&info, caps);
gst_query_add_allocation_pool (query,
NULL, info.size, down_min + 1, 0);
}
return TRUE;
}
return FALSE;
case GST_QUERY_CAPS:
case GST_QUERY_ACCEPT_CAPS:
if (spad == self->video_pad)
return gst_pad_peer_query (agg->srcpad, query);
break;
default:
break;
}
return GST_AGGREGATOR_CLASS (parent_class)->sink_query (agg, pad, query);
}
static gboolean
gst_dwrite_subtitle_mux_src_query (GstAggregator * agg, GstQuery * query)
{
GstSubtitleMux *self = GST_DWRITE_SUBTITLE_MUX (agg);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
return gst_pad_peer_query (GST_PAD_CAST (self->video_pad), query);
default:
break;
}
return GST_AGGREGATOR_CLASS (parent_class)->src_query (agg, query);
}
static GstFlowReturn
gst_dwrite_subtitle_mux_drain (GstSubtitleMux * self)
{
GstAggregator *agg = GST_AGGREGATOR_CAST (self);
GstElement *elem = GST_ELEMENT_CAST (self);
GstAggregatorPad *srcpad = GST_AGGREGATOR_PAD_CAST (agg->srcpad);
GstBuffer *buffer;
GList *iter;
GstFlowReturn ret;
if (!self->video_pad->buffer)
return GST_FLOW_OK;
buffer = self->video_pad->buffer;
self->video_pad->buffer = NULL;
srcpad->segment.position = GST_BUFFER_PTS (buffer);
if (srcpad->segment.rate >= 0 && GST_BUFFER_DURATION_IS_VALID (buffer) &&
GST_BUFFER_PTS_IS_VALID (buffer)) {
srcpad->segment.position += GST_BUFFER_DURATION (buffer);
}
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_GAP) ||
gst_buffer_get_size (buffer) == 0) {
GST_DEBUG_OBJECT (self, "Dropping gap buffer");
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}
GST_LOG_OBJECT (self, "Draining buffer %" GST_PTR_FORMAT, buffer);
GST_OBJECT_LOCK (self);
for (iter = elem->sinkpads; iter; iter = g_list_next (iter)) {
GstSubtitleMuxPad *pad = (GstSubtitleMuxPad *) iter->data;
if (pad == self->video_pad)
continue;
g_mutex_lock (&pad->lock);
if (!pad->buffer || !pad->active) {
g_mutex_unlock (&pad->lock);
continue;
}
if (GST_BUFFER_FLAG_IS_SET (pad->buffer, GST_BUFFER_FLAG_GAP) ||
gst_buffer_get_size (pad->buffer) == 0) {
g_mutex_unlock (&pad->lock);
continue;
}
buffer = gst_buffer_make_writable (buffer);
gst_buffer_add_dwrite_subtitle_meta (buffer, pad->stream, pad->buffer);
g_mutex_unlock (&pad->lock);
}
GST_OBJECT_UNLOCK (self);
ret = gst_aggregator_finish_buffer (GST_AGGREGATOR_CAST (self), buffer);
GST_LOG_OBJECT (self, "Drain returned %s", gst_flow_get_name (ret));
return ret;
}
static gboolean
gst_dwrite_subtitle_mux_sink_event (GstAggregator * agg, GstAggregatorPad * pad,
GstEvent * event)
{
GstSubtitleMux *self = GST_DWRITE_SUBTITLE_MUX (agg);
GstSubtitleMuxPad *spad = GST_DWRITE_SUBTITLE_MUX_PAD (pad);
GST_LOG_OBJECT (pad, "Got event %" GST_PTR_FORMAT, event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_STREAM_START:
{
const gchar *stream_id;
gst_event_parse_stream_start (event, &stream_id);
g_free (spad->stream_id);
spad->stream_id = g_strdup (stream_id);
break;
}
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
if (spad == self->video_pad) {
GstVideoInfo info;
gint fps_n = 25;
gint fps_d = 1;
GstClockTime latency;
gst_video_info_from_caps (&info, caps);
if (info.fps_n > 0 && info.fps_d > 0) {
fps_n = info.fps_n;
fps_d = info.fps_d;
}
latency = gst_util_uint64_scale (GST_SECOND, fps_d, fps_n);
gst_aggregator_set_latency (agg, latency, latency);
gst_dwrite_subtitle_mux_drain (self);
gst_aggregator_set_src_caps (agg, caps);
} else {
gst_clear_object (&spad->pending_stream);
spad->pending_stream = gst_stream_new (spad->stream_id,
caps, GST_STREAM_TYPE_TEXT, GST_STREAM_FLAG_SPARSE);
}
break;
}
case GST_EVENT_SEGMENT:
if (spad == self->video_pad) {
const GstSegment *segment;
gst_event_parse_segment (event, &segment);
gst_dwrite_subtitle_mux_drain (self);
gst_aggregator_update_segment (agg, segment);
}
break;
case GST_EVENT_TAG:
if (spad != self->video_pad) {
GstTagList *tags;
gst_event_parse_tag (event, &tags);
if (spad->pending_stream)
gst_stream_set_tags (spad->pending_stream, tags);
else if (spad->stream)
gst_stream_set_tags (spad->stream, tags);
}
break;
default:
break;
}
return GST_AGGREGATOR_CLASS (parent_class)->sink_event (agg, pad, event);
}
static GstFlowReturn
gst_dwrite_subtitle_mux_fill_single_queue (GstSubtitleMux * self,
GstSubtitleMuxPad * pad, GstClockTime out_start_running_time,
GstClockTime out_end_running_time, gboolean timeout)
{
GstAggregatorPad *apad = GST_AGGREGATOR_PAD_CAST (pad);
GstSegment *segment;
gboolean is_eos;
GstBuffer *buf;
GstClockTime pts, dur;
GstClockTime start_time;
GstClockTime end_time;
GstClockTime start_running_time, end_running_time;
GstFlowReturn ret = GST_FLOW_OK;
segment = &apad->segment;
if (gst_aggregator_pad_is_inactive (apad)) {
GST_DEBUG_OBJECT (pad, "Pad is inactive");
return GST_FLOW_OK;
}
is_eos = gst_aggregator_pad_is_eos (apad);
if (pad->buffer && GST_CLOCK_TIME_IS_VALID (out_start_running_time) &&
GST_CLOCK_TIME_IS_VALID (pad->end_time) &&
pad->end_time <= out_start_running_time) {
GST_LOG_OBJECT (pad, "Discard prev buffer %" GST_PTR_FORMAT, pad->buffer);
gst_clear_buffer (&pad->buffer);
}
buf = gst_aggregator_pad_peek_buffer (apad);
if (!buf) {
GST_DEBUG_OBJECT (pad, "Pad has empty buffer");
if (!pad->buffer) {
if (is_eos) {
GST_DEBUG_OBJECT (pad, "Pad is EOS");
return GST_FLOW_EOS;
} else if (!timeout) {
GST_DEBUG_OBJECT (pad, "Need more data");
return GST_AGGREGATOR_FLOW_NEED_DATA;
} else {
GST_DEBUG_OBJECT (pad, "Timeout");
}
}
return GST_FLOW_OK;
}
GST_LOG_OBJECT (pad, "Currently peeked buffer %" GST_PTR_FORMAT, buf);
pts = GST_BUFFER_PTS (buf);
if (!GST_CLOCK_TIME_IS_VALID (pts)) {
GST_ERROR_OBJECT (pad, "Unknown buffer pts");
ret = GST_FLOW_ERROR;
goto out;
}
dur = GST_BUFFER_DURATION (buf);
if (GST_CLOCK_TIME_IS_VALID (dur)) {
end_time = gst_segment_to_running_time (segment,
GST_FORMAT_TIME, pts + dur);
} else {
end_time = GST_CLOCK_TIME_NONE;
}
pts = MAX (pts, segment->start);
start_time = gst_segment_to_running_time (segment, GST_FORMAT_TIME, pts);
if (segment->rate >= 0) {
start_running_time = start_time;
end_running_time = end_time;
} else {
start_running_time = end_time;
end_running_time = start_time;
}
if (GST_CLOCK_TIME_IS_VALID (out_start_running_time) &&
GST_CLOCK_TIME_IS_VALID (end_running_time) &&
end_running_time <= out_start_running_time) {
if (pad->pending_stream) {
gst_clear_object (&pad->stream);
pad->stream = g_steal_pointer (&pad->pending_stream);
}
GST_LOG_OBJECT (pad, "Discard old buffer %" GST_PTR_FORMAT, buf);
gst_clear_buffer (&pad->buffer);
gst_aggregator_pad_drop_buffer (apad);
ret = GST_AGGREGATOR_FLOW_NEED_DATA;
goto out;
}
if (!pad->buffer) {
GST_LOG_OBJECT (pad, "Queueing new buffer %" GST_PTR_FORMAT, buf);
if (pad->pending_stream) {
gst_clear_object (&pad->stream);
pad->stream = g_steal_pointer (&pad->pending_stream);
}
pad->buffer = gst_buffer_ref (buf);
pad->start_time = start_running_time;
pad->end_time = end_running_time;
gst_aggregator_pad_drop_buffer (apad);
} else if (pad->buffer != buf && !GST_CLOCK_TIME_IS_VALID (pad->end_time)) {
if (segment->rate >= 0)
pad->end_time = start_running_time;
else
pad->end_time = end_running_time;
if (GST_CLOCK_TIME_IS_VALID (out_start_running_time) &&
GST_CLOCK_TIME_IS_VALID (pad->end_time) &&
pad->end_time > out_start_running_time) {
GST_LOG_OBJECT (pad, "Keep old buffer %" GST_PTR_FORMAT, pad->buffer);
} else {
GST_LOG_OBJECT (pad, "Replacing with new buffer %" GST_PTR_FORMAT, buf);
if (pad->pending_stream) {
gst_clear_object (&pad->stream);
pad->stream = g_steal_pointer (&pad->pending_stream);
}
gst_buffer_replace (&pad->buffer, buf);
pad->start_time = start_running_time;
pad->end_time = end_running_time;
gst_aggregator_pad_drop_buffer (apad);
}
}
if (!GST_CLOCK_TIME_IS_VALID (pad->end_time) &&
GST_CLOCK_TIME_IS_VALID (out_start_running_time)) {
GST_LOG_OBJECT (pad, "Unknown end running time, need more data");
ret = GST_AGGREGATOR_FLOW_NEED_DATA;
}
out:
gst_clear_buffer (&buf);
return ret;
}
static GstFlowReturn
gst_dwrite_subtitle_mux_fill_queues (GstSubtitleMux * self,
GstClockTime start_running_time, GstClockTime end_running_time,
gboolean timeout)
{
GstElement *elem = GST_ELEMENT_CAST (self);
GList *iter;
gboolean need_more_data = FALSE;
GstFlowReturn ret;
GST_OBJECT_LOCK (self);
for (iter = elem->sinkpads; iter; iter = g_list_next (iter)) {
GstSubtitleMuxPad *pad = (GstSubtitleMuxPad *) iter->data;
if (pad == self->video_pad)
continue;
ret = gst_dwrite_subtitle_mux_fill_single_queue (self, pad,
start_running_time, end_running_time, timeout);
if (ret == GST_FLOW_ERROR) {
GST_OBJECT_UNLOCK (self);
return GST_FLOW_ERROR;
}
if (ret == GST_AGGREGATOR_FLOW_NEED_DATA)
need_more_data = TRUE;
}
GST_OBJECT_UNLOCK (self);
if (need_more_data)
return GST_AGGREGATOR_FLOW_NEED_DATA;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_dwrite_subtitle_mux_aggregate (GstAggregator * agg, gboolean timeout)
{
GstSubtitleMux *self = GST_DWRITE_SUBTITLE_MUX (agg);
GstAggregatorPad *video_pad = GST_AGGREGATOR_PAD_CAST (self->video_pad);
GstSegment *agg_segment = &GST_AGGREGATOR_PAD_CAST (agg->srcpad)->segment;
GstBuffer *video_buf = NULL;
GstClockTime cur_running_time = GST_CLOCK_TIME_NONE;
GstFlowReturn ret;
video_buf = gst_aggregator_pad_peek_buffer (video_pad);
if (!video_buf) {
if (gst_aggregator_pad_is_eos (video_pad)) {
if (!self->video_pad->buffer) {
GST_DEBUG_OBJECT (self, "Video EOS");
return GST_FLOW_EOS;
}
} else {
return GST_AGGREGATOR_FLOW_NEED_DATA;
}
}
if (video_buf) {
cur_running_time = gst_segment_to_running_time (&video_pad->segment,
GST_FORMAT_TIME, GST_BUFFER_PTS (video_buf));
if (!self->video_pad->buffer) {
GST_DEBUG_OBJECT (self,
"Initial video buffer %" GST_PTR_FORMAT, video_buf);
self->video_pad->buffer = video_buf;
if (agg_segment->rate >= 0)
self->video_pad->start_time = cur_running_time;
else
self->video_pad->end_time = cur_running_time;
gst_aggregator_pad_drop_buffer (video_pad);
return GST_AGGREGATOR_FLOW_NEED_DATA;
}
}
if (agg_segment->rate >= 0) {
self->video_pad->end_time = cur_running_time;
} else {
self->video_pad->start_time = cur_running_time;
}
GST_LOG_OBJECT (self, "Fill subtitle queues for running time %"
GST_TIME_FORMAT " - %" GST_TIME_FORMAT,
GST_TIME_ARGS (self->video_pad->start_time),
GST_TIME_ARGS (self->video_pad->end_time));
ret = gst_dwrite_subtitle_mux_fill_queues (self, self->video_pad->start_time,
self->video_pad->end_time, timeout);
if (ret == GST_FLOW_OK) {
ret = gst_dwrite_subtitle_mux_drain (self);
gst_aggregator_pad_drop_buffer (video_pad);
if (video_buf) {
self->video_pad->buffer = gst_buffer_ref (video_buf);
if (agg_segment->rate >= 0)
self->video_pad->start_time = cur_running_time;
else
self->video_pad->end_time = cur_running_time;
}
} else if (ret == GST_AGGREGATOR_FLOW_NEED_DATA) {
GST_DEBUG_OBJECT (self, "Need more data");
}
gst_clear_buffer (&video_buf);
return ret;
}

35
subprojects/gst-plugins-bad/sys/dwrite/gstdwritesubtitlemux.h Normal file
View file

@ -0,0 +1,35 @@
/* GStreamer
* Copyright (C) 2023 Seungha Yang <seungha@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.
*/
#pragma once
#include <gst/gst.h>
#include <gst/base/base.h>
G_BEGIN_DECLS
#define GST_TYPE_DWRITE_SUBTITLE_MUX_PAD (gst_dwrite_subtitle_mux_pad_get_type())
G_DECLARE_FINAL_TYPE (GstSubtitleMuxPad, gst_dwrite_subtitle_mux_pad,
GST, DWRITE_SUBTITLE_MUX_PAD, GstAggregatorPad)
#define GST_TYPE_DWRITE_SUBTITLE_MUX (gst_dwrite_subtitle_mux_get_type())
G_DECLARE_FINAL_TYPE (GstSubtitleMux, gst_dwrite_subtitle_mux,
GST, DWRITE_SUBTITLE_MUX, GstAggregator)
G_END_DECLS

1
subprojects/gst-plugins-bad/sys/dwrite/meson.build
View file

@ -7,6 +7,7 @@ dwrite_sources = [
'gstdwritebitmapmemory.cpp',
'gstdwritebitmappool.cpp',
'gstdwriteclockoverlay.cpp',
'gstdwritesubtitlemux.cpp',
'gstdwritetextoverlay.cpp',
'gstdwritetimeoverlay.cpp',
'plugin.cpp',

3
subprojects/gst-plugins-bad/sys/dwrite/plugin.cpp
View file

@ -27,6 +27,7 @@
#include "config.h"
#endif
#include "gstdwritesubtitlemux.h"
#include "gstdwriteclockoverlay.h"
#include "gstdwritetextoverlay.h"
#include "gstdwritetimeoverlay.h"
@ -38,6 +39,8 @@ plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_dwrite_debug, "dwrite", 0, "dwrite");
gst_element_register (plugin, "dwritesubtitlemux", GST_RANK_NONE,
GST_TYPE_DWRITE_SUBTITLE_MUX);
gst_element_register (plugin, "dwriteclockoverlay", GST_RANK_NONE,
GST_TYPE_DWRITE_CLOCK_OVERLAY);
gst_element_register (plugin, "dwritetextoverlay", GST_RANK_NONE,