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transcodebin: Implement support for upstream stream selection
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3128>
This commit is contained in:
Thibault Saunier
parent
31acfcd875
commit
bf964f896f
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@ -29,8 +29,6 @@
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#include <gst/pbutils/missing-plugins.h>
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/**
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* GstTranscodeBin!sink_%u:
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*
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@ -109,6 +107,7 @@ typedef struct
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GstElement *video_filter;
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GPtrArray *transcoding_streams;
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gboolean upstream_selected;
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} GstTranscodeBin;
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typedef struct
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@ -127,6 +126,9 @@ G_DEFINE_TYPE (GstTranscodeBin, gst_transcode_bin, GST_TYPE_BIN);
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (transcodebin, "transcodebin", GST_RANK_NONE,
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GST_TYPE_TRANSCODE_BIN, transcodebin_element_init (plugin));
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static GstPad *
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get_encodebin_pad_from_stream (GstTranscodeBin * self, GstStream * stream);
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enum
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{
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PROP_0,
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@ -316,17 +318,52 @@ done:
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return res;
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}
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static TranscodingStream *
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setup_stream (GstTranscodeBin * self, GstStream * stream)
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{
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TranscodingStream *res = NULL;
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GstPad *encodebin_pad = get_encodebin_pad_from_stream (self, stream);
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if (encodebin_pad) {
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GST_INFO_OBJECT (self,
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"Going to transcode stream %s (encodebin pad: %" GST_PTR_FORMAT ")",
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gst_stream_get_stream_id (stream), encodebin_pad);
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res = transcoding_stream_new (stream, encodebin_pad);
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GST_OBJECT_LOCK (self);
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g_ptr_array_add (self->transcoding_streams, res);
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GST_OBJECT_UNLOCK (self);
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}
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return res;
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}
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static void
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gst_transcode_bin_link_encodebin_pad (GstTranscodeBin * self, GstPad * pad,
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const gchar * stream_id)
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GstEvent * sstart)
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{
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GstCaps *caps;
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GstPadLinkReturn lret;
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TranscodingStream *stream = find_stream (self, stream_id, NULL);
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const gchar *stream_id;
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TranscodingStream *stream;
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gst_event_parse_stream_start (sstart, &stream_id);
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stream = find_stream (self, stream_id, NULL);
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if (!stream) {
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GST_ERROR_OBJECT (self, "%s -> Got not stream, decodebin3 bug?", stream_id);
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return;
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if (self->upstream_selected) {
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GstStream *tmpstream;
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gst_event_parse_stream (sstart, &tmpstream);
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stream = setup_stream (self, tmpstream);
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}
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if (!stream) {
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GST_ERROR_OBJECT (self, "Could not find any stream with ID: %s",
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stream_id);
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return;
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}
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}
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caps = gst_pad_query_caps (pad, NULL);
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@ -371,15 +408,13 @@ static GstPadProbeReturn
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wait_stream_start_probe (GstPad * pad,
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GstPadProbeInfo * info, GstTranscodeBin * self)
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{
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const gchar *stream_id;
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if (GST_EVENT_TYPE (info->data) != GST_EVENT_STREAM_START)
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return GST_PAD_PROBE_OK;
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gst_event_parse_stream_start (info->data, &stream_id);
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GST_INFO_OBJECT (self, "Got pad %" GST_PTR_FORMAT " with stream ID: %s",
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pad, stream_id);
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gst_transcode_bin_link_encodebin_pad (self, pad, stream_id);
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GST_INFO_OBJECT (self,
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"Got pad %" GST_PTR_FORMAT " with stream:: %" GST_PTR_FORMAT, pad,
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info->data);
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gst_transcode_bin_link_encodebin_pad (self, pad, info->data);
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return GST_PAD_PROBE_REMOVE;
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}
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@ -399,7 +434,7 @@ decodebin_pad_added_cb (GstElement * decodebin, GstPad * pad,
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gst_event_parse_stream_start (sstart_event, &stream_id);
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GST_INFO_OBJECT (self, "Got pad %" GST_PTR_FORMAT " with stream ID: %s",
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pad, stream_id);
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gst_transcode_bin_link_encodebin_pad (self, pad, stream_id);
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gst_transcode_bin_link_encodebin_pad (self, pad, sstart_event);
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return;
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}
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@ -549,8 +584,7 @@ caps_is_raw (GstCaps * caps, GstStreamType stype)
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}
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static GstPad *
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get_encodebin_pad_from_stream (GstTranscodeBin * self,
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GstEncodingProfile * profile, GstStream * stream)
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get_encodebin_pad_from_stream (GstTranscodeBin * self, GstStream * stream)
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{
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GstCaps *caps = gst_stream_get_caps (stream);
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GstPad *sinkpad = get_encodebin_pad_for_caps (self, caps);
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@ -597,22 +631,9 @@ select_stream_cb (GstElement * decodebin,
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for (i = 0; i < gst_stream_collection_get_size (collection); i++) {
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GstStream *tmpstream = gst_stream_collection_get_stream (collection, i);
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GstPad *encodebin_pad =
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get_encodebin_pad_from_stream (self, self->profile, tmpstream);
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if (encodebin_pad) {
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if (stream == tmpstream)
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transcode_stream = TRUE;
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GST_INFO_OBJECT (self,
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"Going to transcode stream %s (encodebin pad: %" GST_PTR_FORMAT,
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gst_stream_get_stream_id (tmpstream), encodebin_pad);
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GST_OBJECT_LOCK (self);
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g_ptr_array_add (self->transcoding_streams,
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transcoding_stream_new (tmpstream, encodebin_pad));
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GST_OBJECT_UNLOCK (self);
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}
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if (setup_stream (self, tmpstream) && stream == tmpstream)
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transcode_stream = TRUE;
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}
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GST_OBJECT_LOCK (self);
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@ -737,6 +758,38 @@ remove_all_children (GstTranscodeBin * self)
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}
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}
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static gboolean
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sink_event_function (GstPad * sinkpad, GstTranscodeBin * self, GstEvent * event)
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{
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_STREAM_START:
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{
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GstQuery *q = gst_query_new_selectable ();
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/* Query whether upstream can handle stream selection or not */
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if (gst_pad_peer_query (sinkpad, q)) {
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GST_FIXME_OBJECT (self, "We force `transcodebin` to upstream selection"
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" mode if *any* of the inputs is. This means things might break if"
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" there's a mix");
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gst_query_parse_selectable (q, &self->upstream_selected);
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GST_DEBUG_OBJECT (sinkpad, "Upstream is selectable : %d",
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self->upstream_selected);
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} else {
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self->upstream_selected = FALSE;
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GST_DEBUG_OBJECT (sinkpad, "Upstream does not handle SELECTABLE query");
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}
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gst_query_unref (q);
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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_pad_event_default (sinkpad, GST_OBJECT (self), event);
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}
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static GstStateChangeReturn
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gst_transcode_bin_change_state (GstElement * element, GstStateChange transition)
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{
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@ -851,6 +904,7 @@ gst_transcode_bin_request_pad (GstElement * element, GstPadTemplate * temp,
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}
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gpad = gst_ghost_pad_new_from_template (name, decodebin_pad, temp);
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gst_pad_set_event_function (gpad, (GstPadEventFunction) sink_event_function);
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gst_element_add_pad (element, GST_PAD (gpad));
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gst_object_unref (decodebin_pad);
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@ -29,7 +29,7 @@
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#include <gst/pbutils/missing-plugins.h>
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GST_DEBUG_CATEGORY_STATIC (gst_transcodebin_debug);
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GST_DEBUG_CATEGORY (gst_transcodebin_debug);
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#define GST_CAT_DEFAULT gst_transcodebin_debug
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void
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