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707 lines
22 KiB
C
707 lines
22 KiB
C
/* GStreamer
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* Copyright (C) <2006> Wim Taymans <wim.taymans@gmail.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/tag/tag.h>
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#include <gst/rtp/gstrtpbuffer.h>
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#include <gst/video/video.h>
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#include <string.h>
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#include "gstrtptheoradepay.h"
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#include "gstrtputils.h"
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GST_DEBUG_CATEGORY_STATIC (rtptheoradepay_debug);
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#define GST_CAT_DEFAULT (rtptheoradepay_debug)
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static GstStaticPadTemplate gst_rtp_theora_depay_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 ("application/x-rtp, "
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"media = (string) \"video\", "
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"clock-rate = (int) 90000, " "encoding-name = (string) \"THEORA\""
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/* All required parameters
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*
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* "sampling = (string) { "YCbCr-4:2:0", "YCbCr-4:2:2", "YCbCr-4:4:4" } "
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* "width = (string) [1, 1048561] (multiples of 16) "
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* "height = (string) [1, 1048561] (multiples of 16) "
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* "delivery-method = (string) { inline, in_band, out_band/<specific_name> } "
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* "configuration = (string) ANY"
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*/
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/* All optional parameters
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*
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* "configuration-uri ="
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*/
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)
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);
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static GstStaticPadTemplate gst_rtp_theora_depay_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 ("video/x-theora")
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);
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#define gst_rtp_theora_depay_parent_class parent_class
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G_DEFINE_TYPE (GstRtpTheoraDepay, gst_rtp_theora_depay,
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GST_TYPE_RTP_BASE_DEPAYLOAD);
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static gboolean gst_rtp_theora_depay_setcaps (GstRTPBaseDepayload * depayload,
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GstCaps * caps);
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static GstBuffer *gst_rtp_theora_depay_process (GstRTPBaseDepayload * depayload,
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GstRTPBuffer * rtp);
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static gboolean gst_rtp_theora_depay_packet_lost (GstRTPBaseDepayload *
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depayload, GstEvent * event);
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static void gst_rtp_theora_depay_finalize (GObject * object);
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static GstStateChangeReturn gst_rtp_theora_depay_change_state (GstElement *
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element, GstStateChange transition);
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static void
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gst_rtp_theora_depay_class_init (GstRtpTheoraDepayClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;
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gobject_class->finalize = gst_rtp_theora_depay_finalize;
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gstelement_class->change_state = gst_rtp_theora_depay_change_state;
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gstrtpbasedepayload_class->process_rtp_packet = gst_rtp_theora_depay_process;
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gstrtpbasedepayload_class->set_caps = gst_rtp_theora_depay_setcaps;
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gstrtpbasedepayload_class->packet_lost = gst_rtp_theora_depay_packet_lost;
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_rtp_theora_depay_sink_template);
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_rtp_theora_depay_src_template);
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gst_element_class_set_static_metadata (gstelement_class,
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"RTP Theora depayloader", "Codec/Depayloader/Network/RTP",
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"Extracts Theora video from RTP packets (draft-01 of RFC XXXX)",
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"Wim Taymans <wim.taymans@gmail.com>");
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GST_DEBUG_CATEGORY_INIT (rtptheoradepay_debug, "rtptheoradepay", 0,
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"Theora RTP Depayloader");
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}
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static void
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gst_rtp_theora_depay_init (GstRtpTheoraDepay * rtptheoradepay)
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{
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rtptheoradepay->adapter = gst_adapter_new ();
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}
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static void
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free_config (GstRtpTheoraConfig * config)
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{
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g_list_free_full (config->headers, (GDestroyNotify) gst_buffer_unref);
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g_free (config);
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}
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static void
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free_indents (GstRtpTheoraDepay * rtptheoradepay)
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{
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g_list_free_full (rtptheoradepay->configs, (GDestroyNotify) free_config);
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rtptheoradepay->configs = NULL;
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}
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static void
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gst_rtp_theora_depay_finalize (GObject * object)
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{
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GstRtpTheoraDepay *rtptheoradepay = GST_RTP_THEORA_DEPAY (object);
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g_object_unref (rtptheoradepay->adapter);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static gboolean
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gst_rtp_theora_depay_parse_configuration (GstRtpTheoraDepay * rtptheoradepay,
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GstBuffer * confbuf)
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{
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GstBuffer *buf;
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guint32 num_headers;
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GstMapInfo map;
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guint8 *data;
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gsize size;
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gint i, j;
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gst_buffer_map (confbuf, &map, GST_MAP_READ);
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data = map.data;
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size = map.size;
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GST_DEBUG_OBJECT (rtptheoradepay, "config size %" G_GSIZE_FORMAT, size);
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/* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Number of packed headers |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Packed header |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Packed header |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | .... |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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if (size < 4)
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goto too_small;
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num_headers = GST_READ_UINT32_BE (data);
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size -= 4;
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data += 4;
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GST_DEBUG_OBJECT (rtptheoradepay, "have %u headers", num_headers);
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/* 0 1 2 3
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Ident | length ..
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* .. | n. of headers | length1 | length2 ..
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* .. | Identification Header ..
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* .................................................................
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* .. | Comment Header ..
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* .................................................................
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* .. Comment Header |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Setup Header ..
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* .................................................................
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* .. Setup Header |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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for (i = 0; i < num_headers; i++) {
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guint32 ident;
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guint16 length;
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guint8 n_headers, b;
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GstRtpTheoraConfig *conf;
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guint *h_sizes;
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guint extra = 1;
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if (size < 6)
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goto too_small;
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ident = (data[0] << 16) | (data[1] << 8) | data[2];
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length = (data[3] << 8) | data[4];
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n_headers = data[5];
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size -= 6;
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data += 6;
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GST_DEBUG_OBJECT (rtptheoradepay,
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"header %d, ident 0x%08x, length %u, left %" G_GSIZE_FORMAT, i, ident,
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length, size);
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/* FIXME check if we already got this ident */
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/* length might also include count of following size fields */
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if (size < length && size + 1 != length)
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goto too_small;
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/* read header sizes we read 2 sizes, the third size (for which we allocate
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* space) must be derived from the total packed header length. */
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h_sizes = g_newa (guint, n_headers + 1);
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for (j = 0; j < n_headers; j++) {
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guint h_size;
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h_size = 0;
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do {
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if (size < 1)
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goto too_small;
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b = *data++;
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size--;
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extra++;
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h_size = (h_size << 7) | (b & 0x7f);
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} while (b & 0x80);
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GST_DEBUG_OBJECT (rtptheoradepay, "headers %d: size: %u", j, h_size);
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h_sizes[j] = h_size;
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length -= h_size;
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}
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/* last header length is the remaining space */
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GST_DEBUG_OBJECT (rtptheoradepay, "last header size: %u", length);
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h_sizes[j] = length;
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GST_DEBUG_OBJECT (rtptheoradepay, "preparing headers");
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conf = g_new0 (GstRtpTheoraConfig, 1);
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conf->ident = ident;
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for (j = 0; j <= n_headers; j++) {
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guint h_size;
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h_size = h_sizes[j];
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if (size < h_size) {
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if (j != n_headers || size + extra != h_size) {
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free_config (conf);
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goto too_small;
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} else {
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/* otherwise means that overall length field contained total length,
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* including extra fields */
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h_size -= extra;
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}
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}
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GST_DEBUG_OBJECT (rtptheoradepay, "reading header %d, size %u", j,
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h_size);
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buf =
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gst_buffer_copy_region (confbuf, GST_BUFFER_COPY_ALL, data - map.data,
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h_size);
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conf->headers = g_list_append (conf->headers, buf);
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data += h_size;
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size -= h_size;
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}
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rtptheoradepay->configs = g_list_append (rtptheoradepay->configs, conf);
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}
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gst_buffer_unmap (confbuf, &map);
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gst_buffer_unref (confbuf);
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return TRUE;
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/* ERRORS */
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too_small:
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{
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GST_DEBUG_OBJECT (rtptheoradepay, "configuration too small");
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gst_buffer_unmap (confbuf, &map);
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gst_buffer_unref (confbuf);
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return FALSE;
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}
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}
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static gboolean
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gst_rtp_theora_depay_parse_inband_configuration (GstRtpTheoraDepay *
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rtptheoradepay, guint ident, guint8 * configuration, guint size,
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guint length)
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{
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GstBuffer *confbuf;
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GstMapInfo map;
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if (G_UNLIKELY (size < 4))
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return FALSE;
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/* transform inline to out-of-band and parse that one */
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confbuf = gst_buffer_new_and_alloc (size + 9);
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gst_buffer_map (confbuf, &map, GST_MAP_WRITE);
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/* 1 header */
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GST_WRITE_UINT32_BE (map.data, 1);
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/* write Ident */
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GST_WRITE_UINT24_BE (map.data + 4, ident);
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/* write sort-of-length */
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GST_WRITE_UINT16_BE (map.data + 7, length);
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/* copy remainder */
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memcpy (map.data + 9, configuration, size);
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gst_buffer_unmap (confbuf, &map);
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return gst_rtp_theora_depay_parse_configuration (rtptheoradepay, confbuf);
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}
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static gboolean
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gst_rtp_theora_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
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{
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GstStructure *structure;
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GstRtpTheoraDepay *rtptheoradepay;
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GstCaps *srccaps;
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const gchar *configuration;
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gboolean res;
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rtptheoradepay = GST_RTP_THEORA_DEPAY (depayload);
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rtptheoradepay->needs_keyframe = FALSE;
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structure = gst_caps_get_structure (caps, 0);
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/* read and parse configuration string */
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configuration = gst_structure_get_string (structure, "configuration");
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if (configuration) {
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GstBuffer *confbuf;
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guint8 *data;
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gsize size;
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/* deserialize base64 to buffer */
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data = g_base64_decode (configuration, &size);
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confbuf = gst_buffer_new ();
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gst_buffer_append_memory (confbuf,
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gst_memory_new_wrapped (0, data, size, 0, size, data, g_free));
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if (!gst_rtp_theora_depay_parse_configuration (rtptheoradepay, confbuf))
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goto invalid_configuration;
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}
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/* set caps on pad and on header */
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srccaps = gst_caps_new_empty_simple ("video/x-theora");
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res = gst_pad_set_caps (depayload->srcpad, srccaps);
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gst_caps_unref (srccaps);
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/* Clock rate is always 90000 according to draft-barbato-avt-rtp-theora-01 */
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depayload->clock_rate = 90000;
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return res;
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/* ERRORS */
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invalid_configuration:
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{
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GST_ERROR_OBJECT (rtptheoradepay, "invalid configuration specified");
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return FALSE;
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}
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}
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static gboolean
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gst_rtp_theora_depay_switch_codebook (GstRtpTheoraDepay * rtptheoradepay,
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guint32 ident)
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{
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GList *walk;
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gboolean res = FALSE;
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for (walk = rtptheoradepay->configs; walk; walk = g_list_next (walk)) {
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GstRtpTheoraConfig *conf = (GstRtpTheoraConfig *) walk->data;
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if (conf->ident == ident) {
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GList *headers;
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/* FIXME, remove pads, create new pad.. */
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/* push out all the headers */
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for (headers = conf->headers; headers; headers = g_list_next (headers)) {
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GstBuffer *header = GST_BUFFER_CAST (headers->data);
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gst_buffer_ref (header);
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gst_rtp_base_depayload_push (GST_RTP_BASE_DEPAYLOAD (rtptheoradepay),
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header);
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}
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/* remember the current config */
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rtptheoradepay->config = conf;
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res = TRUE;
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}
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}
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if (!res) {
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/* we don't know about the headers, figure out an alternative method for
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* getting the codebooks. FIXME, fail for now. */
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}
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return res;
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}
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static GstBuffer *
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gst_rtp_theora_depay_process (GstRTPBaseDepayload * depayload,
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GstRTPBuffer * rtp)
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{
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GstRtpTheoraDepay *rtptheoradepay;
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GstBuffer *outbuf;
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GstFlowReturn ret;
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gint payload_len;
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GstMapInfo map;
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GstBuffer *payload_buffer = NULL;
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guint8 *payload;
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guint32 header, ident;
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guint8 F, TDT, packets;
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guint length;
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rtptheoradepay = GST_RTP_THEORA_DEPAY (depayload);
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payload_len = gst_rtp_buffer_get_payload_len (rtp);
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GST_DEBUG_OBJECT (depayload, "got RTP packet of size %d", payload_len);
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/* we need at least 4 bytes for the packet header */
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if (G_UNLIKELY (payload_len < 4))
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goto packet_short;
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payload = gst_rtp_buffer_get_payload (rtp);
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header = GST_READ_UINT32_BE (payload);
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/*
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* 0 1 2 3
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Ident | F |TDT|# pkts.|
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
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* F: Fragment type (0=none, 1=start, 2=cont, 3=end)
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* TDT: Theora data type (0=theora, 1=config, 2=comment, 3=reserved)
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* pkts: number of packets.
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*/
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TDT = (header & 0x30) >> 4;
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if (G_UNLIKELY (TDT == 3))
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goto ignore_reserved;
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ident = (header >> 8) & 0xffffff;
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F = (header & 0xc0) >> 6;
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packets = (header & 0xf);
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GST_DEBUG_OBJECT (depayload, "ident: 0x%08x, F: %d, TDT: %d, packets: %d",
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|
ident, F, TDT, packets);
|
|
|
|
if (TDT == 0) {
|
|
gboolean do_switch = FALSE;
|
|
|
|
/* we have a raw payload, find the codebook for the ident */
|
|
if (!rtptheoradepay->config) {
|
|
/* we don't have an active codebook, find the codebook and
|
|
* activate it */
|
|
do_switch = TRUE;
|
|
} else if (rtptheoradepay->config->ident != ident) {
|
|
/* codebook changed */
|
|
do_switch = TRUE;
|
|
}
|
|
if (do_switch) {
|
|
if (!gst_rtp_theora_depay_switch_codebook (rtptheoradepay, ident))
|
|
goto switch_failed;
|
|
}
|
|
}
|
|
|
|
/* fragmented packets, assemble */
|
|
if (F != 0) {
|
|
GstBuffer *vdata;
|
|
|
|
if (F == 1) {
|
|
/* if we start a packet, clear adapter and start assembling. */
|
|
gst_adapter_clear (rtptheoradepay->adapter);
|
|
GST_DEBUG_OBJECT (depayload, "start assemble");
|
|
rtptheoradepay->assembling = TRUE;
|
|
}
|
|
|
|
if (!rtptheoradepay->assembling)
|
|
goto no_output;
|
|
|
|
/* skip header and length. */
|
|
vdata = gst_rtp_buffer_get_payload_subbuffer (rtp, 6, -1);
|
|
|
|
GST_DEBUG_OBJECT (depayload, "assemble theora packet");
|
|
gst_adapter_push (rtptheoradepay->adapter, vdata);
|
|
|
|
/* packet is not complete, we are done */
|
|
if (F != 3)
|
|
goto no_output;
|
|
|
|
/* construct assembled buffer */
|
|
length = gst_adapter_available (rtptheoradepay->adapter);
|
|
payload_buffer = gst_adapter_take_buffer (rtptheoradepay->adapter, length);
|
|
} else {
|
|
length = 0;
|
|
payload_buffer = gst_rtp_buffer_get_payload_subbuffer (rtp, 4, -1);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (depayload, "assemble done, payload_len %d", payload_len);
|
|
|
|
gst_buffer_map (payload_buffer, &map, GST_MAP_READ);
|
|
payload = map.data;
|
|
payload_len = map.size;
|
|
|
|
/* we not assembling anymore now */
|
|
rtptheoradepay->assembling = FALSE;
|
|
gst_adapter_clear (rtptheoradepay->adapter);
|
|
|
|
/* payload now points to a length with that many theora data bytes.
|
|
* Iterate over the packets and send them out.
|
|
*
|
|
* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | length | theora data ..
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* .. theora data |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | length | next theora packet data ..
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* .. theora data |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+*
|
|
*/
|
|
while (payload_len >= 2) {
|
|
/* If length is not 0, we have a reassembled packet for which we
|
|
* calculated the length already and don't have to skip over the
|
|
* length field anymore
|
|
*/
|
|
if (length == 0) {
|
|
length = GST_READ_UINT16_BE (payload);
|
|
payload += 2;
|
|
payload_len -= 2;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (depayload, "read length %u, avail: %d", length,
|
|
payload_len);
|
|
|
|
/* skip packet if something odd happens */
|
|
if (G_UNLIKELY (length > payload_len))
|
|
goto length_short;
|
|
|
|
/* handle in-band configuration */
|
|
if (G_UNLIKELY (TDT == 1)) {
|
|
GST_DEBUG_OBJECT (rtptheoradepay, "in-band configuration");
|
|
if (!gst_rtp_theora_depay_parse_inband_configuration (rtptheoradepay,
|
|
ident, payload, payload_len, length))
|
|
goto invalid_configuration;
|
|
goto no_output;
|
|
}
|
|
|
|
/* create buffer for packet */
|
|
outbuf =
|
|
gst_buffer_copy_region (payload_buffer, GST_BUFFER_COPY_ALL,
|
|
payload - map.data, length);
|
|
|
|
if (payload_len > 0 && (payload[0] & 0xC0) == 0x0) {
|
|
rtptheoradepay->needs_keyframe = FALSE;
|
|
} else {
|
|
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
|
|
}
|
|
|
|
payload += length;
|
|
payload_len -= length;
|
|
/* make sure to read next length */
|
|
length = 0;
|
|
|
|
ret = gst_rtp_base_depayload_push (depayload, outbuf);
|
|
if (ret != GST_FLOW_OK)
|
|
break;
|
|
}
|
|
|
|
if (rtptheoradepay->needs_keyframe)
|
|
goto request_keyframe;
|
|
|
|
out:
|
|
no_output:
|
|
|
|
if (payload_buffer) {
|
|
gst_buffer_unmap (payload_buffer, &map);
|
|
gst_buffer_unref (payload_buffer);
|
|
}
|
|
|
|
return NULL;
|
|
|
|
/* ERRORS */
|
|
switch_failed:
|
|
{
|
|
GST_ELEMENT_WARNING (rtptheoradepay, STREAM, DECODE,
|
|
(NULL), ("Could not switch codebooks"));
|
|
goto request_config;
|
|
}
|
|
packet_short:
|
|
{
|
|
GST_ELEMENT_WARNING (rtptheoradepay, STREAM, DECODE,
|
|
(NULL), ("Packet was too short (%d < 4)", payload_len));
|
|
goto request_keyframe;
|
|
}
|
|
ignore_reserved:
|
|
{
|
|
GST_WARNING_OBJECT (rtptheoradepay, "reserved TDT ignored");
|
|
goto out;
|
|
}
|
|
length_short:
|
|
{
|
|
GST_ELEMENT_WARNING (rtptheoradepay, STREAM, DECODE,
|
|
(NULL), ("Packet contains invalid data"));
|
|
goto request_keyframe;
|
|
}
|
|
invalid_configuration:
|
|
{
|
|
/* fatal, as we otherwise risk carrying on without output */
|
|
GST_ELEMENT_ERROR (rtptheoradepay, STREAM, DECODE,
|
|
(NULL), ("Packet contains invalid configuration"));
|
|
goto request_config;
|
|
}
|
|
request_config:
|
|
{
|
|
gst_pad_push_event (GST_RTP_BASE_DEPAYLOAD_SINKPAD (depayload),
|
|
gst_event_new_custom (GST_EVENT_CUSTOM_UPSTREAM,
|
|
gst_structure_new ("GstForceKeyUnit",
|
|
"all-headers", G_TYPE_BOOLEAN, TRUE, NULL)));
|
|
goto out;
|
|
}
|
|
request_keyframe:
|
|
{
|
|
rtptheoradepay->needs_keyframe = TRUE;
|
|
gst_pad_push_event (GST_RTP_BASE_DEPAYLOAD_SINKPAD (depayload),
|
|
gst_event_new_custom (GST_EVENT_CUSTOM_UPSTREAM,
|
|
gst_structure_new_empty ("GstForceKeyUnit")));
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_rtp_theora_depay_change_state (GstElement * element,
|
|
GstStateChange transition)
|
|
{
|
|
GstRtpTheoraDepay *rtptheoradepay;
|
|
GstStateChangeReturn ret;
|
|
|
|
rtptheoradepay = GST_RTP_THEORA_DEPAY (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
free_indents (rtptheoradepay);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
gboolean
|
|
gst_rtp_theora_depay_plugin_init (GstPlugin * plugin)
|
|
{
|
|
return gst_element_register (plugin, "rtptheoradepay",
|
|
GST_RANK_SECONDARY, GST_TYPE_RTP_THEORA_DEPAY);
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_theora_depay_packet_lost (GstRTPBaseDepayload * depayload,
|
|
GstEvent * event)
|
|
{
|
|
GstRtpTheoraDepay *rtptheoradepay = GST_RTP_THEORA_DEPAY (depayload);
|
|
guint seqnum = 0;
|
|
|
|
gst_structure_get_uint (gst_event_get_structure (event), "seqnum", &seqnum);
|
|
GST_LOG_OBJECT (depayload, "Requested keyframe because frame with seqnum %u"
|
|
" is missing", seqnum);
|
|
rtptheoradepay->needs_keyframe = TRUE;
|
|
|
|
gst_pad_push_event (GST_RTP_BASE_DEPAYLOAD_SINKPAD (depayload),
|
|
gst_event_new_custom (GST_EVENT_CUSTOM_UPSTREAM,
|
|
gst_structure_new_empty ("GstForceKeyUnit")));
|
|
|
|
return TRUE;
|
|
}
|