| /* GStreamer |
| * Copyright (C) <2007> Thijs Vermeir <thijsvermeir@gmail.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <stdlib.h> |
| #include <string.h> |
| #include <gst/rtp/gstrtpbuffer.h> |
| #include <gst/video/video.h> |
| |
| #include "gstrtpmpvpay.h" |
| #include "gstrtputils.h" |
| |
| GST_DEBUG_CATEGORY_STATIC (rtpmpvpay_debug); |
| #define GST_CAT_DEFAULT (rtpmpvpay_debug) |
| |
| 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\"; " |
| "application/x-rtp, " |
| "media = (string) \"video\", " |
| "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", " |
| "clock-rate = (int) 90000, " "encoding-name = (string) \"MPV\"") |
| ); |
| |
| static GstStateChangeReturn gst_rtp_mpv_pay_change_state (GstElement * element, |
| GstStateChange transition); |
| |
| static void gst_rtp_mpv_pay_finalize (GObject * object); |
| |
| static GstFlowReturn gst_rtp_mpv_pay_flush (GstRTPMPVPay * rtpmpvpay); |
| static gboolean gst_rtp_mpv_pay_setcaps (GstRTPBasePayload * payload, |
| GstCaps * caps); |
| static GstFlowReturn gst_rtp_mpv_pay_handle_buffer (GstRTPBasePayload * |
| payload, GstBuffer * buffer); |
| static gboolean gst_rtp_mpv_pay_sink_event (GstRTPBasePayload * payload, |
| GstEvent * event); |
| |
| #define gst_rtp_mpv_pay_parent_class parent_class |
| G_DEFINE_TYPE (GstRTPMPVPay, gst_rtp_mpv_pay, GST_TYPE_RTP_BASE_PAYLOAD); |
| |
| static void |
| gst_rtp_mpv_pay_class_init (GstRTPMPVPayClass * klass) |
| { |
| GObjectClass *gobject_class; |
| GstElementClass *gstelement_class; |
| GstRTPBasePayloadClass *gstrtpbasepayload_class; |
| |
| gobject_class = (GObjectClass *) klass; |
| gstelement_class = (GstElementClass *) klass; |
| gstrtpbasepayload_class = (GstRTPBasePayloadClass *) klass; |
| |
| gobject_class->finalize = gst_rtp_mpv_pay_finalize; |
| |
| gstelement_class->change_state = gst_rtp_mpv_pay_change_state; |
| |
| gst_element_class_add_static_pad_template (gstelement_class, |
| &gst_rtp_mpv_pay_sink_template); |
| gst_element_class_add_static_pad_template (gstelement_class, |
| &gst_rtp_mpv_pay_src_template); |
| |
| gst_element_class_set_static_metadata (gstelement_class, |
| "RTP MPEG2 ES video payloader", "Codec/Payloader/Network/RTP", |
| "Payload-encodes MPEG2 ES into RTP packets (RFC 2250)", |
| "Thijs Vermeir <thijsvermeir@gmail.com>"); |
| |
| gstrtpbasepayload_class->set_caps = gst_rtp_mpv_pay_setcaps; |
| gstrtpbasepayload_class->handle_buffer = gst_rtp_mpv_pay_handle_buffer; |
| gstrtpbasepayload_class->sink_event = gst_rtp_mpv_pay_sink_event; |
| |
| GST_DEBUG_CATEGORY_INIT (rtpmpvpay_debug, "rtpmpvpay", 0, |
| "MPEG2 ES Video RTP Payloader"); |
| } |
| |
| static void |
| gst_rtp_mpv_pay_init (GstRTPMPVPay * rtpmpvpay) |
| { |
| GST_RTP_BASE_PAYLOAD (rtpmpvpay)->clock_rate = 90000; |
| GST_RTP_BASE_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 void |
| gst_rtp_mpv_pay_reset (GstRTPMPVPay * pay) |
| { |
| pay->first_ts = -1; |
| pay->duration = 0; |
| gst_adapter_clear (pay->adapter); |
| GST_DEBUG_OBJECT (pay, "reset depayloader"); |
| } |
| |
| static gboolean |
| gst_rtp_mpv_pay_setcaps (GstRTPBasePayload * payload, GstCaps * caps) |
| { |
| gst_rtp_base_payload_set_options (payload, "video", |
| payload->pt != GST_RTP_PAYLOAD_MPV, "MPV", 90000); |
| return gst_rtp_base_payload_set_outcaps (payload, NULL); |
| } |
| |
| static gboolean |
| gst_rtp_mpv_pay_sink_event (GstRTPBasePayload * payload, GstEvent * event) |
| { |
| gboolean ret; |
| GstRTPMPVPay *rtpmpvpay; |
| |
| rtpmpvpay = GST_RTP_MPV_PAY (payload); |
| |
| switch (GST_EVENT_TYPE (event)) { |
| case GST_EVENT_EOS: |
| /* make sure we push the last packets in the adapter on EOS */ |
| gst_rtp_mpv_pay_flush (rtpmpvpay); |
| break; |
| case GST_EVENT_FLUSH_STOP: |
| gst_rtp_mpv_pay_reset (rtpmpvpay); |
| break; |
| default: |
| break; |
| } |
| |
| ret = GST_RTP_BASE_PAYLOAD_CLASS (parent_class)->sink_event (payload, event); |
| |
| return ret; |
| } |
| |
| #define RTP_HEADER_LEN 12 |
| |
| static GstFlowReturn |
| gst_rtp_mpv_pay_flush (GstRTPMPVPay * rtpmpvpay) |
| { |
| GstFlowReturn ret; |
| guint avail; |
| GstBufferList *list; |
| GstBuffer *outbuf; |
| |
| guint8 *payload; |
| |
| avail = gst_adapter_available (rtpmpvpay->adapter); |
| |
| ret = GST_FLOW_OK; |
| |
| GST_DEBUG_OBJECT (rtpmpvpay, "available %u", avail); |
| if (avail == 0) |
| return GST_FLOW_OK; |
| |
| list = |
| gst_buffer_list_new_sized (avail / (GST_RTP_BASE_PAYLOAD_MTU (rtpmpvpay) - |
| RTP_HEADER_LEN) + 1); |
| |
| while (avail > 0) { |
| guint towrite; |
| guint packet_len; |
| guint payload_len; |
| GstRTPBuffer rtp = { NULL }; |
| GstBuffer *paybuf; |
| |
| packet_len = gst_rtp_buffer_calc_packet_len (avail + 4, 0, 0); |
| |
| towrite = MIN (packet_len, GST_RTP_BASE_PAYLOAD_MTU (rtpmpvpay)); |
| |
| payload_len = gst_rtp_buffer_calc_payload_len (towrite, 0, 0); |
| |
| outbuf = gst_rtp_buffer_new_allocate (4, 0, 0); |
| |
| payload_len -= 4; |
| |
| gst_rtp_buffer_map (outbuf, GST_MAP_WRITE, &rtp); |
| |
| payload = gst_rtp_buffer_get_payload (&rtp); |
| /* 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); |
| |
| avail -= payload_len; |
| |
| gst_rtp_buffer_set_marker (&rtp, avail == 0); |
| gst_rtp_buffer_unmap (&rtp); |
| |
| paybuf = gst_adapter_take_buffer_fast (rtpmpvpay->adapter, payload_len); |
| gst_rtp_copy_video_meta (rtpmpvpay, outbuf, paybuf); |
| outbuf = gst_buffer_append (outbuf, paybuf); |
| |
| GST_DEBUG_OBJECT (rtpmpvpay, "Adding buffer"); |
| |
| GST_BUFFER_PTS (outbuf) = rtpmpvpay->first_ts; |
| gst_buffer_list_add (list, outbuf); |
| } |
| |
| ret = gst_rtp_base_payload_push_list (GST_RTP_BASE_PAYLOAD (rtpmpvpay), list); |
| |
| return ret; |
| } |
| |
| static GstFlowReturn |
| gst_rtp_mpv_pay_handle_buffer (GstRTPBasePayload * 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_PTS (buffer); |
| duration = GST_BUFFER_DURATION (buffer); |
| |
| if (GST_BUFFER_IS_DISCONT (buffer)) { |
| GST_DEBUG_OBJECT (rtpmpvpay, "DISCONT"); |
| gst_rtp_mpv_pay_reset (rtpmpvpay); |
| } |
| |
| avail = gst_adapter_available (rtpmpvpay->adapter); |
| |
| if (duration == -1) |
| duration = 0; |
| |
| if (rtpmpvpay->first_ts == GST_CLOCK_TIME_NONE || avail == 0) |
| rtpmpvpay->first_ts = timestamp; |
| |
| if (avail == 0) { |
| rtpmpvpay->duration = duration; |
| } else { |
| rtpmpvpay->duration += duration; |
| } |
| |
| gst_adapter_push (rtpmpvpay->adapter, buffer); |
| avail = gst_adapter_available (rtpmpvpay->adapter); |
| |
| /* 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); |
| GST_LOG_OBJECT (rtpmpvpay, "available %d, rtp packet length %d", avail, |
| packet_len); |
| |
| if (gst_rtp_base_payload_is_filled (basepayload, |
| packet_len, rtpmpvpay->duration)) { |
| ret = gst_rtp_mpv_pay_flush (rtpmpvpay); |
| } else { |
| rtpmpvpay->first_ts = timestamp; |
| } |
| |
| return ret; |
| } |
| |
| static GstStateChangeReturn |
| gst_rtp_mpv_pay_change_state (GstElement * element, GstStateChange transition) |
| { |
| GstRTPMPVPay *rtpmpvpay; |
| GstStateChangeReturn ret; |
| |
| rtpmpvpay = GST_RTP_MPV_PAY (element); |
| |
| switch (transition) { |
| case GST_STATE_CHANGE_READY_TO_PAUSED: |
| gst_rtp_mpv_pay_reset (rtpmpvpay); |
| break; |
| default: |
| break; |
| } |
| |
| ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); |
| |
| switch (transition) { |
| case GST_STATE_CHANGE_PAUSED_TO_READY: |
| gst_rtp_mpv_pay_reset (rtpmpvpay); |
| break; |
| default: |
| break; |
| } |
| return ret; |
| } |
| |
| |
| gboolean |
| gst_rtp_mpv_pay_plugin_init (GstPlugin * plugin) |
| { |
| return gst_element_register (plugin, "rtpmpvpay", |
| GST_RANK_SECONDARY, GST_TYPE_RTP_MPV_PAY); |
| } |