/* GStreamer * Copyright (C) <2007> Thijs Vermeir * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "gstrtpmpvpay.h" static const GstElementDetails gst_rtp_mpv_pay_details = GST_ELEMENT_DETAILS ("RTP MPEG2 ES video payloader", "Codec/Payloader/Network", "Payload-encodes MPEG2 ES into RTP packets (RFC 2250)", "Thijs Vermeir "); static GstStaticPadTemplate gst_rtp_mpv_pay_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/mpeg, " "mpegversion = (int) 2, systemstream = (boolean) FALSE") ); static GstStaticPadTemplate gst_rtp_mpv_pay_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("application/x-rtp, " "media = (string) \"video\", " "payload = (int) " GST_RTP_PAYLOAD_MPV_STRING ", " "clock-rate = (int) 90000, " "encoding-name = (string) \"MPV\"") ); static gboolean gst_rtp_mpv_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps); static GstFlowReturn gst_rtp_mpv_pay_handle_buffer (GstBaseRTPPayload * payload, GstBuffer * buffer); static GstFlowReturn gst_rtp_mpv_pay_flush (GstRTPMPVPay * rtpmpvpay); static void gst_rtp_mpv_pay_finalize (GObject * object); GST_BOILERPLATE (GstRTPMPVPay, gst_rtp_mpv_pay, GstBaseRTPPayload, GST_TYPE_BASE_RTP_PAYLOAD); static void gst_rtp_mpv_pay_base_init (gpointer klass) { GstElementClass *element_class = GST_ELEMENT_CLASS (klass); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_rtp_mpv_pay_sink_template)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_rtp_mpv_pay_src_template)); gst_element_class_set_details (element_class, &gst_rtp_mpv_pay_details); } static void gst_rtp_mpv_pay_class_init (GstRTPMPVPayClass * klass) { GObjectClass *gobject_class; GstBaseRTPPayloadClass *gstbasertppayload_class; gobject_class = (GObjectClass *) klass; gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass; gobject_class->finalize = gst_rtp_mpv_pay_finalize; gstbasertppayload_class->set_caps = gst_rtp_mpv_pay_setcaps; gstbasertppayload_class->handle_buffer = gst_rtp_mpv_pay_handle_buffer; } static void gst_rtp_mpv_pay_init (GstRTPMPVPay * rtpmpvpay, GstRTPMPVPayClass * klass) { GST_BASE_RTP_PAYLOAD (rtpmpvpay)->clock_rate = 90000; GST_BASE_RTP_PAYLOAD_PT (rtpmpvpay) = GST_RTP_PAYLOAD_MPV; rtpmpvpay->adapter = gst_adapter_new (); } static void gst_rtp_mpv_pay_finalize (GObject * object) { GstRTPMPVPay *rtpmpvpay; rtpmpvpay = GST_RTP_MPV_PAY (object); g_object_unref (rtpmpvpay->adapter); rtpmpvpay->adapter = NULL; G_OBJECT_CLASS (parent_class)->finalize (object); } static gboolean gst_rtp_mpv_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps) { gst_basertppayload_set_options (payload, "video", FALSE, "MPV", 90000); return gst_basertppayload_set_outcaps (payload, NULL); } static GstFlowReturn gst_rtp_mpv_pay_flush (GstRTPMPVPay * rtpmpvpay) { GstBuffer *outbuf; GstFlowReturn ret; guint avail; guint8 *payload; avail = gst_adapter_available (rtpmpvpay->adapter); ret = GST_FLOW_OK; while (avail > 0) { guint towrite; guint packet_len; guint payload_len; packet_len = gst_rtp_buffer_calc_packet_len (avail, 4, 0); towrite = MIN (packet_len, GST_BASE_RTP_PAYLOAD_MTU (rtpmpvpay)); payload_len = gst_rtp_buffer_calc_payload_len (towrite, 4, 0); outbuf = gst_rtp_buffer_new_allocate (payload_len, 4, 0); payload = gst_rtp_buffer_get_payload (outbuf); /* enable MPEG Video-specific header * * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | MBZ |T| TR | |N|S|B|E| P | | BFC | | FFC | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * AN FBV FFV */ /* fill in the MPEG Video-specific header * data is set to 0x0 here */ memset (payload, 0x0, 4); gst_adapter_copy (rtpmpvpay->adapter, payload + 4, 0, payload_len); gst_adapter_flush (rtpmpvpay->adapter, payload_len); avail -= payload_len; gst_rtp_buffer_set_marker (outbuf, avail == 0); GST_BUFFER_TIMESTAMP (outbuf) = rtpmpvpay->first_ts; ret = gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtpmpvpay), outbuf); } return ret; } static GstFlowReturn gst_rtp_mpv_pay_handle_buffer (GstBaseRTPPayload * basepayload, GstBuffer * buffer) { GstRTPMPVPay *rtpmpvpay; guint avail, packet_len; GstClockTime timestamp, duration; GstFlowReturn ret = GST_FLOW_OK; rtpmpvpay = GST_RTP_MPV_PAY (basepayload); timestamp = GST_BUFFER_TIMESTAMP (buffer); duration = GST_BUFFER_DURATION (buffer); avail = gst_adapter_available (rtpmpvpay->adapter); if (duration == -1) duration = 0; /* Initialize new RTP payload */ if (avail == 0) { rtpmpvpay->first_ts = timestamp; rtpmpvpay->duration = duration; } /* get packet length of previous data and this new data, * payload length includes a 4 byte MPEG video-specific header */ packet_len = gst_rtp_buffer_calc_packet_len (avail, 4, 0); if (gst_basertppayload_is_filled (basepayload, packet_len, rtpmpvpay->duration + duration)) { ret = gst_rtp_mpv_pay_flush (rtpmpvpay); rtpmpvpay->first_ts = timestamp; rtpmpvpay->duration = 0; } gst_adapter_push (rtpmpvpay->adapter, buffer); rtpmpvpay->duration += duration; return ret; } gboolean gst_rtp_mpv_pay_plugin_init (GstPlugin * plugin) { return gst_element_register (plugin, "rtpmpvpay", GST_RANK_NONE, GST_TYPE_RTP_MPV_PAY); }