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614 lines
17 KiB
C
614 lines
17 KiB
C
/* GStreamer
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* Copyright (C) 2019 Thibault Saunier <tsaunier@igalia.com>
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*
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* gsttranscodebin.c:
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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 "gsttranscoding.h"
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#include <gst/pbutils/pbutils.h>
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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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#define GST_CAT_DEFAULT gst_transcodebin_debug
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static GstStaticPadTemplate transcode_bin_sink_template =
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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 transcode_bin_src_template =
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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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typedef struct
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{
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GstBin parent;
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GstElement *decodebin;
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GstElement *encodebin;
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GstEncodingProfile *profile;
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gboolean avoid_reencoding;
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GstPad *sinkpad;
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GstPad *srcpad;
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GstElement *audio_filter;
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GstElement *video_filter;
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} GstTranscodeBin;
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typedef struct
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{
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GstBinClass parent;
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} GstTranscodeBinClass;
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/* *INDENT-OFF* */
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#define GST_TYPE_TRANSCODE_BIN (gst_transcode_bin_get_type ())
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#define GST_TRANSCODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_TRANSCODE_BIN, GstTranscodeBin))
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#define GST_TRANSCODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TRANSCODE_BIN_TYPE, GstTranscodeBinClass))
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#define GST_IS_TRANSCODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TRANSCODE_BIN_TYPE))
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#define GST_IS_TRANSCODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TRANSCODE_BIN_TYPE))
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#define GST_TRANSCODE_BIN_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TRANSCODE_BIN_TYPE, GstTranscodeBinClass))
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#define DEFAULT_AVOID_REENCODING FALSE
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G_DEFINE_TYPE (GstTranscodeBin, gst_transcode_bin, GST_TYPE_BIN)
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enum
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{
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PROP_0,
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PROP_PROFILE,
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PROP_AVOID_REENCODING,
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PROP_VIDEO_FILTER,
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PROP_AUDIO_FILTER,
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LAST_PROP
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};
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static void
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post_missing_plugin_error (GstElement * dec, const gchar * element_name)
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{
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GstMessage *msg;
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msg = gst_missing_element_message_new (dec, element_name);
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gst_element_post_message (dec, msg);
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GST_ELEMENT_ERROR (dec, CORE, MISSING_PLUGIN,
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("Missing element '%s' - check your GStreamer installation.",
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element_name), (NULL));
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}
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/* *INDENT-ON* */
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static GstPad *
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_insert_filter (GstTranscodeBin * self, GstPad * sinkpad, GstPad * pad,
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GstCaps * caps)
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{
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GstPad *filter_src = NULL, *filter_sink = NULL;
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GstElement *filter = NULL;
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GstObject *filter_parent;
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if (self->video_filter &&
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!g_strcmp0 (gst_structure_get_name (gst_caps_get_structure (caps, 0)),
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"video/x-raw")) {
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filter = self->video_filter;
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} else if (self->audio_filter &&
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!g_strcmp0 (gst_structure_get_name (gst_caps_get_structure (caps, 0)),
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"audio/x-raw")) {
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filter = self->audio_filter;
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}
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if (!filter)
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return pad;
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if ((filter_parent = gst_object_get_parent (GST_OBJECT (filter)))) {
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GST_WARNING_OBJECT (self,
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"Filter already in use (inside %" GST_PTR_FORMAT ").", filter_parent);
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GST_FIXME_OBJECT (self,
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"Handle transcoding several streams of a same kind.");
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gst_object_unref (filter_parent);
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return pad;
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}
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/* We are guaranteed filters only have 1 unique sinkpad and srcpad */
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GST_OBJECT_LOCK (filter);
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filter_sink = filter->sinkpads->data;
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filter_src = filter->srcpads->data;
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GST_OBJECT_UNLOCK (filter);
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gst_bin_add (GST_BIN (self), gst_object_ref (filter));
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if (G_UNLIKELY (gst_pad_link (pad, filter_sink) != GST_PAD_LINK_OK)) {
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GstCaps *othercaps = gst_pad_get_current_caps (sinkpad);
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caps = gst_pad_get_current_caps (pad);
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GST_ELEMENT_ERROR (self, CORE, PAD,
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(NULL),
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("Couldn't link pads \n\n%" GST_PTR_FORMAT "\n\n and \n\n %"
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GST_PTR_FORMAT "\n\n", caps, othercaps));
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gst_caps_unref (caps);
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gst_caps_unref (othercaps);
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}
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gst_element_sync_state_with_parent (filter);
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return filter_src;
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}
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static void
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pad_added_cb (GstElement * decodebin, GstPad * pad, GstTranscodeBin * self)
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{
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GstCaps *caps;
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GstPad *sinkpad = NULL;
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GstPadLinkReturn lret;
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caps = gst_pad_query_caps (pad, NULL);
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GST_DEBUG_OBJECT (decodebin, "Pad added, caps: %" GST_PTR_FORMAT, caps);
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g_signal_emit_by_name (self->encodebin, "request-pad", caps, &sinkpad);
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if (sinkpad == NULL) {
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gchar *stream_id = gst_pad_get_stream_id (pad);
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GST_ELEMENT_WARNING_WITH_DETAILS (self, STREAM, FORMAT,
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(NULL), ("Stream with caps: %" GST_PTR_FORMAT " can not be"
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" encoded in the defined encoding formats",
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caps),
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("can-t-encode-stream", G_TYPE_BOOLEAN, TRUE,
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"stream-caps", GST_TYPE_CAPS, caps,
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"stream-id", G_TYPE_STRING, stream_id, NULL));
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g_free (stream_id);
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return;
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}
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if (caps)
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gst_caps_unref (caps);
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pad = _insert_filter (self, sinkpad, pad, caps);
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lret = gst_pad_link (pad, sinkpad);
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switch (lret) {
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case GST_PAD_LINK_OK:
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break;
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case GST_PAD_LINK_WAS_LINKED:
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GST_FIXME_OBJECT (self, "Pad %" GST_PTR_FORMAT " was already linked",
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sinkpad);
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break;
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default:
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{
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GstCaps *othercaps = gst_pad_query_caps (sinkpad, NULL);
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caps = gst_pad_get_current_caps (pad);
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GST_ELEMENT_ERROR_WITH_DETAILS (self, CORE, PAD,
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(NULL),
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("Couldn't link pads:\n %" GST_PTR_FORMAT ": %" GST_PTR_FORMAT
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"\nand:\n"
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" %" GST_PTR_FORMAT ": %" GST_PTR_FORMAT "\n\n",
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pad, caps, sinkpad, othercaps),
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("linking-error", GST_TYPE_PAD_LINK_RETURN, lret,
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"source-pad", GST_TYPE_PAD, pad,
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"source-caps", GST_TYPE_CAPS, caps,
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"sink-pad", GST_TYPE_PAD, sinkpad,
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"sink-caps", GST_TYPE_CAPS, othercaps, NULL));
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gst_caps_unref (caps);
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if (othercaps)
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gst_caps_unref (othercaps);
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}
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}
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gst_object_unref (sinkpad);
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}
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static gboolean
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make_encodebin (GstTranscodeBin * self)
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{
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GstPad *pad;
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GST_INFO_OBJECT (self, "making new encodebin");
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if (!self->profile)
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goto no_profile;
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self->encodebin = gst_element_factory_make ("encodebin", NULL);
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if (!self->encodebin)
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goto no_encodebin;
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gst_bin_add (GST_BIN (self), self->encodebin);
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g_object_set (self->encodebin, "profile", self->profile, NULL);
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pad = gst_element_get_static_pad (self->encodebin, "src");
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if (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), pad)) {
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gst_object_unref (pad);
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GST_ERROR_OBJECT (self, "Could not ghost %" GST_PTR_FORMAT " srcpad",
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self->encodebin);
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return FALSE;
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}
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gst_object_unref (pad);
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return gst_element_sync_state_with_parent (self->encodebin);
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/* ERRORS */
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no_encodebin:
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{
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post_missing_plugin_error (GST_ELEMENT_CAST (self), "encodebin");
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GST_ELEMENT_ERROR (self, CORE, MISSING_PLUGIN, (NULL),
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("No encodebin element, check your installation"));
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return FALSE;
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}
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/* ERRORS */
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no_profile:
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{
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GST_ELEMENT_ERROR (self, CORE, MISSING_PLUGIN, (NULL),
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("No GstEncodingProfile set, can not run."));
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return FALSE;
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}
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}
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static gboolean
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make_decodebin (GstTranscodeBin * self)
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{
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GstPad *pad;
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GST_INFO_OBJECT (self, "making new decodebin");
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self->decodebin = gst_element_factory_make ("decodebin", NULL);
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if (!self->decodebin)
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goto no_decodebin;
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if (self->avoid_reencoding) {
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GstCaps *decodecaps;
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g_object_get (self->decodebin, "caps", &decodecaps, NULL);
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if (GST_IS_ENCODING_CONTAINER_PROFILE (self->profile)) {
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GList *tmp;
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decodecaps = gst_caps_make_writable (decodecaps);
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for (tmp = (GList *)
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gst_encoding_container_profile_get_profiles
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(GST_ENCODING_CONTAINER_PROFILE (self->profile)); tmp;
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tmp = tmp->next) {
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GstCaps *encodecaps = gst_encoding_profile_get_format (tmp->data);
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GstCaps *restrictions =
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gst_encoding_profile_get_restriction (tmp->data);
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if (!restrictions)
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gst_caps_append (decodecaps, encodecaps);
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else
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gst_caps_unref (restrictions);
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}
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}
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g_object_set (self->decodebin, "caps", decodecaps, NULL);
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gst_caps_unref (decodecaps);
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}
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g_signal_connect (self->decodebin, "pad-added", G_CALLBACK (pad_added_cb),
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self);
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gst_bin_add (GST_BIN (self), self->decodebin);
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pad = gst_element_get_static_pad (self->decodebin, "sink");
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if (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->sinkpad), pad)) {
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gst_object_unref (pad);
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GST_ERROR_OBJECT (self, "Could not ghost %" GST_PTR_FORMAT " sinkpad",
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self->decodebin);
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return FALSE;
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}
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gst_object_unref (pad);
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return TRUE;
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/* ERRORS */
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no_decodebin:
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{
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post_missing_plugin_error (GST_ELEMENT_CAST (self), "decodebin");
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GST_ELEMENT_ERROR (self, CORE, MISSING_PLUGIN, (NULL),
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("No decodebin element, check your installation"));
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return FALSE;
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}
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}
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static void
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remove_all_children (GstTranscodeBin * self)
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{
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if (self->encodebin) {
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gst_element_set_state (self->encodebin, GST_STATE_NULL);
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gst_bin_remove (GST_BIN (self), self->encodebin);
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self->encodebin = NULL;
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}
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if (self->video_filter && GST_OBJECT_PARENT (self->video_filter)) {
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gst_element_set_state (self->video_filter, GST_STATE_NULL);
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gst_bin_remove (GST_BIN (self), self->video_filter);
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}
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if (self->audio_filter && GST_OBJECT_PARENT (self->audio_filter)) {
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gst_element_set_state (self->audio_filter, GST_STATE_NULL);
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gst_bin_remove (GST_BIN (self), self->audio_filter);
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}
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if (self->decodebin) {
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gst_element_set_state (self->decodebin, GST_STATE_NULL);
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gst_bin_remove (GST_BIN (self), self->decodebin);
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self->decodebin = NULL;
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}
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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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GstStateChangeReturn ret;
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GstTranscodeBin *self = GST_TRANSCODE_BIN (element);
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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if (!make_encodebin (self))
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goto setup_failed;
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if (!make_decodebin (self))
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goto setup_failed;
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break;
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default:
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break;
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}
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ret =
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GST_ELEMENT_CLASS (gst_transcode_bin_parent_class)->change_state (element,
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transition);
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if (ret == GST_STATE_CHANGE_FAILURE)
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goto beach;
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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remove_all_children (self);
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break;
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default:
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break;
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}
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beach:
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return ret;
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setup_failed:
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remove_all_children (self);
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return GST_STATE_CHANGE_FAILURE;
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}
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static void
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gst_transcode_bin_dispose (GObject * object)
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{
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GstTranscodeBin *self = (GstTranscodeBin *) object;
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g_clear_object (&self->video_filter);
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g_clear_object (&self->audio_filter);
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G_OBJECT_CLASS (gst_transcode_bin_parent_class)->dispose (object);
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}
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static void
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gst_transcode_bin_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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GstTranscodeBin *self = GST_TRANSCODE_BIN (object);
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switch (prop_id) {
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case PROP_PROFILE:
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GST_OBJECT_LOCK (self);
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g_value_set_object (value, self->profile);
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GST_OBJECT_UNLOCK (self);
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break;
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case PROP_AVOID_REENCODING:
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GST_OBJECT_LOCK (self);
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g_value_set_boolean (value, self->avoid_reencoding);
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GST_OBJECT_UNLOCK (self);
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break;
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case PROP_AUDIO_FILTER:
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GST_OBJECT_LOCK (self);
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g_value_set_object (value, self->audio_filter);
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GST_OBJECT_UNLOCK (self);
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break;
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case PROP_VIDEO_FILTER:
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GST_OBJECT_LOCK (self);
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g_value_set_object (value, self->video_filter);
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GST_OBJECT_UNLOCK (self);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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_set_filter (GstTranscodeBin * self, GstElement * filter, GstElement ** mfilter)
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{
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if (filter) {
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GST_OBJECT_LOCK (filter);
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if (filter->numsinkpads != 1) {
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GST_ERROR_OBJECT (self, "Can not use %" GST_PTR_FORMAT
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" as filter as it does not have "
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" one and only one sinkpad", filter);
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goto bail_out;
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} else if (filter->numsrcpads != 1) {
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GST_ERROR_OBJECT (self, "Can not use %" GST_PTR_FORMAT
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" as filter as it does not have " " one and only one srcpad", filter);
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goto bail_out;
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}
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GST_OBJECT_UNLOCK (filter);
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}
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GST_OBJECT_LOCK (self);
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*mfilter = filter;
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GST_OBJECT_UNLOCK (self);
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return;
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bail_out:
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GST_OBJECT_UNLOCK (filter);
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}
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static void
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gst_transcode_bin_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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GstTranscodeBin *self = GST_TRANSCODE_BIN (object);
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switch (prop_id) {
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case PROP_PROFILE:
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GST_OBJECT_LOCK (self);
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self->profile = g_value_dup_object (value);
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GST_OBJECT_UNLOCK (self);
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break;
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case PROP_AVOID_REENCODING:
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GST_OBJECT_LOCK (self);
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self->avoid_reencoding = g_value_get_boolean (value);
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GST_OBJECT_UNLOCK (self);
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break;
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case PROP_AUDIO_FILTER:
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_set_filter (self, g_value_dup_object (value), &self->audio_filter);
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break;
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case PROP_VIDEO_FILTER:
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_set_filter (self, g_value_dup_object (value), &self->video_filter);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
|
|
}
|
|
|
|
static void
|
|
gst_transcode_bin_class_init (GstTranscodeBinClass * klass)
|
|
{
|
|
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
|
GstElementClass *gstelement_klass;
|
|
|
|
object_class->dispose = gst_transcode_bin_dispose;
|
|
object_class->get_property = gst_transcode_bin_get_property;
|
|
object_class->set_property = gst_transcode_bin_set_property;
|
|
|
|
gstelement_klass = (GstElementClass *) klass;
|
|
gstelement_klass->change_state =
|
|
GST_DEBUG_FUNCPTR (gst_transcode_bin_change_state);
|
|
|
|
gst_element_class_add_pad_template (gstelement_klass,
|
|
gst_static_pad_template_get (&transcode_bin_sink_template));
|
|
gst_element_class_add_pad_template (gstelement_klass,
|
|
gst_static_pad_template_get (&transcode_bin_src_template));
|
|
|
|
gst_element_class_set_static_metadata (gstelement_klass,
|
|
"Transcode Bin", "Generic/Bin/Encoding",
|
|
"Autoplug and transcoder a stream",
|
|
"Thibault Saunier <tsaunier@igalia.com>");
|
|
|
|
/**
|
|
* GstTranscodeBin:profile:
|
|
*
|
|
* The #GstEncodingProfile to use. This property must be set before going
|
|
* to %GST_STATE_PAUSED or higher.
|
|
*/
|
|
g_object_class_install_property (object_class, PROP_PROFILE,
|
|
g_param_spec_object ("profile", "Profile",
|
|
"The GstEncodingProfile to use", GST_TYPE_ENCODING_PROFILE,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstTranscodeBin:avoid-reencoding:
|
|
*
|
|
* See #encodebin:avoid-reencoding
|
|
*/
|
|
g_object_class_install_property (object_class, PROP_AVOID_REENCODING,
|
|
g_param_spec_boolean ("avoid-reencoding", "Avoid re-encoding",
|
|
"Whether to re-encode portions of compatible video streams that lay on segment boundaries",
|
|
DEFAULT_AVOID_REENCODING,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstTranscodeBin:video-filter:
|
|
*
|
|
* Set the video filter element/bin to use.
|
|
*/
|
|
g_object_class_install_property (object_class, PROP_VIDEO_FILTER,
|
|
g_param_spec_object ("video-filter", "Video filter",
|
|
"the video filter(s) to apply, if possible",
|
|
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
/**
|
|
* GstTranscodeBin:audio-filter:
|
|
*
|
|
* Set the audio filter element/bin to use.
|
|
*/
|
|
g_object_class_install_property (object_class, PROP_AUDIO_FILTER,
|
|
g_param_spec_object ("audio-filter", "Audio filter",
|
|
"the audio filter(s) to apply, if possible",
|
|
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
}
|
|
|
|
static void
|
|
gst_transcode_bin_init (GstTranscodeBin * self)
|
|
{
|
|
GstPadTemplate *pad_tmpl;
|
|
|
|
pad_tmpl = gst_static_pad_template_get (&transcode_bin_sink_template);
|
|
self->sinkpad = gst_ghost_pad_new_no_target_from_template ("sink", pad_tmpl);
|
|
gst_pad_set_active (self->sinkpad, TRUE);
|
|
gst_element_add_pad (GST_ELEMENT (self), self->sinkpad);
|
|
|
|
gst_object_unref (pad_tmpl);
|
|
|
|
pad_tmpl = gst_static_pad_template_get (&transcode_bin_src_template);
|
|
|
|
self->srcpad = gst_ghost_pad_new_no_target_from_template ("src", pad_tmpl);
|
|
gst_pad_set_active (self->srcpad, TRUE);
|
|
gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
|
|
|
|
gst_object_unref (pad_tmpl);
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
gboolean res = TRUE;
|
|
gst_pb_utils_init ();
|
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_transcodebin_debug, "transcodebin", 0,
|
|
"Transcodebin element");
|
|
|
|
res &= gst_element_register (plugin, "transcodebin", GST_RANK_NONE,
|
|
GST_TYPE_TRANSCODE_BIN);
|
|
|
|
res &= gst_element_register (plugin, "uritranscodebin", GST_RANK_NONE,
|
|
gst_uri_transcode_bin_get_type ());
|
|
|
|
return res;
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
transcode,
|
|
"A plugin containing elements for transcoding", plugin_init, VERSION,
|
|
GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
|