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Add property to set the initial value for picture-id. RFC7741 says that picture-id MAY be initialized to a random value, thus it's also valid to simply set it to a fixed initial value. A fixed value is very useful for testing. Default behavior is not changed. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/728>
598 lines
17 KiB
C
598 lines
17 KiB
C
/*
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* gstrtpvp8pay.c - Source for GstRtpVP8Pay
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* Copyright (C) 2011 Sjoerd Simons <sjoerd@luon.net>
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* Copyright (C) 2011 Collabora Ltd.
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* Contact: Youness Alaoui <youness.alaoui@collabora.co.uk>
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, 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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <gst/base/gstbitreader.h>
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#include <gst/rtp/gstrtppayloads.h>
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#include <gst/rtp/gstrtpbuffer.h>
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#include <gst/video/video.h>
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#include "dboolhuff.h"
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#include "gstrtpvp8pay.h"
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#include "gstrtputils.h"
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GST_DEBUG_CATEGORY_STATIC (gst_rtp_vp8_pay_debug);
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#define GST_CAT_DEFAULT gst_rtp_vp8_pay_debug
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#define DEFAULT_PICTURE_ID_MODE VP8_PAY_NO_PICTURE_ID
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#define DEFAULT_PICTURE_ID_OFFSET (-1)
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enum
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{
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PROP_0,
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PROP_PICTURE_ID_MODE,
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PROP_PICTURE_ID_OFFSET
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};
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#define GST_TYPE_RTP_VP8_PAY_PICTURE_ID_MODE (gst_rtp_vp8_pay_picture_id_mode_get_type())
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static GType
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gst_rtp_vp8_pay_picture_id_mode_get_type (void)
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{
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static GType mode_type = 0;
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static const GEnumValue modes[] = {
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{VP8_PAY_NO_PICTURE_ID, "No Picture ID", "none"},
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{VP8_PAY_PICTURE_ID_7BITS, "7-bit Picture ID", "7-bit"},
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{VP8_PAY_PICTURE_ID_15BITS, "15-bit Picture ID", "15-bit"},
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{0, NULL, NULL},
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};
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if (!mode_type) {
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mode_type = g_enum_register_static ("GstVP8RTPPayMode", modes);
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}
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return mode_type;
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}
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static void gst_rtp_vp8_pay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_rtp_vp8_pay_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static GstFlowReturn gst_rtp_vp8_pay_handle_buffer (GstRTPBasePayload * payload,
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GstBuffer * buffer);
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static gboolean gst_rtp_vp8_pay_sink_event (GstRTPBasePayload * payload,
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GstEvent * event);
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static gboolean gst_rtp_vp8_pay_set_caps (GstRTPBasePayload * payload,
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GstCaps * caps);
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G_DEFINE_TYPE (GstRtpVP8Pay, gst_rtp_vp8_pay, GST_TYPE_RTP_BASE_PAYLOAD);
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static GstStaticPadTemplate gst_rtp_vp8_pay_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 ("application/x-rtp, "
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"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ","
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"clock-rate = (int) 90000, encoding-name = (string) { \"VP8\", \"VP8-DRAFT-IETF-01\" }"));
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static GstStaticPadTemplate gst_rtp_vp8_pay_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 ("video/x-vp8"));
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static gint
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picture_id_field_len (PictureIDMode mode)
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{
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if (VP8_PAY_NO_PICTURE_ID == mode)
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return 0;
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if (VP8_PAY_PICTURE_ID_7BITS == mode)
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return 7;
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return 15;
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}
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static void
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gst_rtp_vp8_pay_picture_id_reset (GstRtpVP8Pay * obj)
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{
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gint nbits;
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if (obj->picture_id_offset == -1)
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obj->picture_id = g_random_int ();
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else
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obj->picture_id = obj->picture_id_offset;
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nbits = picture_id_field_len (obj->picture_id_mode);
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obj->picture_id &= (1 << nbits) - 1;
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}
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static void
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gst_rtp_vp8_pay_picture_id_increment (GstRtpVP8Pay * obj)
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{
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gint nbits;
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if (obj->picture_id_mode == VP8_PAY_NO_PICTURE_ID)
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return;
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nbits = picture_id_field_len (obj->picture_id_mode);
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obj->picture_id++;
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obj->picture_id &= (1 << nbits) - 1;
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}
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static void
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gst_rtp_vp8_pay_init (GstRtpVP8Pay * obj)
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{
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obj->picture_id_mode = DEFAULT_PICTURE_ID_MODE;
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gst_rtp_vp8_pay_picture_id_reset (obj);
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obj->picture_id_offset = DEFAULT_PICTURE_ID_OFFSET;
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}
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static void
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gst_rtp_vp8_pay_class_init (GstRtpVP8PayClass * gst_rtp_vp8_pay_class)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (gst_rtp_vp8_pay_class);
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GstElementClass *element_class = GST_ELEMENT_CLASS (gst_rtp_vp8_pay_class);
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GstRTPBasePayloadClass *pay_class =
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GST_RTP_BASE_PAYLOAD_CLASS (gst_rtp_vp8_pay_class);
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gobject_class->set_property = gst_rtp_vp8_pay_set_property;
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gobject_class->get_property = gst_rtp_vp8_pay_get_property;
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g_object_class_install_property (gobject_class, PROP_PICTURE_ID_MODE,
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g_param_spec_enum ("picture-id-mode", "Picture ID Mode",
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"The picture ID mode for payloading",
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GST_TYPE_RTP_VP8_PAY_PICTURE_ID_MODE, DEFAULT_PICTURE_ID_MODE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* rtpvp8pay:picture-id-offset:
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*
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* Offset to add to the initial picture-id (-1 = random)
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*
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* Since: 1.20
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*/
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g_object_class_install_property (gobject_class, PROP_PICTURE_ID_OFFSET,
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g_param_spec_int ("picture-id-offset", "Picture ID offset",
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"Offset to add to the initial picture-id (-1 = random)",
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-1, 0x7FFF, DEFAULT_PICTURE_ID_OFFSET,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_add_static_pad_template (element_class,
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&gst_rtp_vp8_pay_sink_template);
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gst_element_class_add_static_pad_template (element_class,
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&gst_rtp_vp8_pay_src_template);
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gst_element_class_set_static_metadata (element_class, "RTP VP8 payloader",
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"Codec/Payloader/Network/RTP",
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"Puts VP8 video in RTP packets", "Sjoerd Simons <sjoerd@luon.net>");
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pay_class->handle_buffer = gst_rtp_vp8_pay_handle_buffer;
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pay_class->sink_event = gst_rtp_vp8_pay_sink_event;
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pay_class->set_caps = gst_rtp_vp8_pay_set_caps;
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GST_DEBUG_CATEGORY_INIT (gst_rtp_vp8_pay_debug, "rtpvp8pay", 0,
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"VP8 Video RTP Payloader");
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gst_type_mark_as_plugin_api (GST_TYPE_RTP_VP8_PAY_PICTURE_ID_MODE, 0);
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}
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static void
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gst_rtp_vp8_pay_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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GstRtpVP8Pay *rtpvp8pay = GST_RTP_VP8_PAY (object);
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switch (prop_id) {
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case PROP_PICTURE_ID_MODE:
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rtpvp8pay->picture_id_mode = g_value_get_enum (value);
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gst_rtp_vp8_pay_picture_id_reset (rtpvp8pay);
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break;
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case PROP_PICTURE_ID_OFFSET:
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rtpvp8pay->picture_id_offset = g_value_get_int (value);
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gst_rtp_vp8_pay_picture_id_reset (rtpvp8pay);
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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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break;
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}
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}
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static void
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gst_rtp_vp8_pay_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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GstRtpVP8Pay *rtpvp8pay = GST_RTP_VP8_PAY (object);
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switch (prop_id) {
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case PROP_PICTURE_ID_MODE:
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g_value_set_enum (value, rtpvp8pay->picture_id_mode);
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break;
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case PROP_PICTURE_ID_OFFSET:
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g_value_set_int (value, rtpvp8pay->picture_id_offset);
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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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break;
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}
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}
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static gboolean
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gst_rtp_vp8_pay_parse_frame (GstRtpVP8Pay * self, GstBuffer * buffer,
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gsize buffer_size)
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{
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GstMapInfo map = GST_MAP_INFO_INIT;
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GstBitReader reader;
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guint8 *data;
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gsize size;
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int i;
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gboolean keyframe;
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guint32 partition0_size;
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guint8 version;
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guint8 tmp8 = 0;
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guint8 partitions;
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guint offset;
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BOOL_DECODER bc;
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guint8 *pdata;
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if (G_UNLIKELY (buffer_size < 3))
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goto error;
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if (!gst_buffer_map (buffer, &map, GST_MAP_READ) || !map.data)
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goto error;
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data = map.data;
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size = map.size;
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gst_bit_reader_init (&reader, data, size);
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self->is_keyframe = keyframe = ((data[0] & 0x1) == 0);
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version = (data[0] >> 1) & 0x7;
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if (G_UNLIKELY (version > 3)) {
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GST_ERROR_OBJECT (self, "Unknown VP8 version %u", version);
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goto error;
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}
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/* keyframe, version and show_frame use 5 bits */
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partition0_size = data[2] << 11 | data[1] << 3 | (data[0] >> 5);
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/* Include the uncompressed data blob in the first partition */
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offset = keyframe ? 10 : 3;
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partition0_size += offset;
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if (!gst_bit_reader_skip (&reader, 24))
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goto error;
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if (keyframe) {
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/* check start tag: 0x9d 0x01 0x2a */
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp8, 8) || tmp8 != 0x9d)
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goto error;
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp8, 8) || tmp8 != 0x01)
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goto error;
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp8, 8) || tmp8 != 0x2a)
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goto error;
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/* Skip horizontal size code (16 bits) vertical size code (16 bits) */
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if (!gst_bit_reader_skip (&reader, 32))
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goto error;
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}
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offset = keyframe ? 10 : 3;
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vp8dx_start_decode (&bc, data + offset, size - offset);
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if (keyframe) {
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/* color space (1 bit) and clamping type (1 bit) */
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vp8dx_decode_bool (&bc, 0x80);
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vp8dx_decode_bool (&bc, 0x80);
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}
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/* segmentation_enabled */
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if (vp8dx_decode_bool (&bc, 0x80)) {
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guint8 update_mb_segmentation_map = vp8dx_decode_bool (&bc, 0x80);
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guint8 update_segment_feature_data = vp8dx_decode_bool (&bc, 0x80);
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if (update_segment_feature_data) {
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/* skip segment feature mode */
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vp8dx_decode_bool (&bc, 0x80);
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/* quantizer update */
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for (i = 0; i < 4; i++) {
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/* skip flagged quantizer value (7 bits) and sign (1 bit) */
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if (vp8dx_decode_bool (&bc, 0x80))
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vp8_decode_value (&bc, 8);
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}
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/* loop filter update */
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for (i = 0; i < 4; i++) {
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/* skip flagged lf update value (6 bits) and sign (1 bit) */
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if (vp8dx_decode_bool (&bc, 0x80))
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vp8_decode_value (&bc, 7);
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}
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}
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if (update_mb_segmentation_map) {
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/* segment prob update */
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for (i = 0; i < 3; i++) {
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/* skip flagged segment prob */
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if (vp8dx_decode_bool (&bc, 0x80))
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vp8_decode_value (&bc, 8);
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}
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}
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}
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/* skip filter type (1 bit), loop filter level (6 bits) and
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* sharpness level (3 bits) */
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vp8_decode_value (&bc, 1);
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vp8_decode_value (&bc, 6);
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vp8_decode_value (&bc, 3);
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/* loop_filter_adj_enabled */
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if (vp8dx_decode_bool (&bc, 0x80)) {
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/* delta update */
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if (vp8dx_decode_bool (&bc, 0x80)) {
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for (i = 0; i < 8; i++) {
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/* 8 updates, 1 bit indicate whether there is one and if follow by a
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* 7 bit update */
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if (vp8dx_decode_bool (&bc, 0x80))
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vp8_decode_value (&bc, 7);
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}
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}
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}
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if (vp8dx_bool_error (&bc))
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goto error;
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tmp8 = vp8_decode_value (&bc, 2);
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partitions = 1 << tmp8;
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/* Check if things are still sensible */
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if (partition0_size + (partitions - 1) * 3 >= size)
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goto error;
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/* partition data is right after the mode partition */
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pdata = data + partition0_size;
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/* Set up mapping */
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self->n_partitions = partitions + 1;
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self->partition_offset[0] = 0;
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self->partition_size[0] = partition0_size + (partitions - 1) * 3;
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self->partition_offset[1] = self->partition_size[0];
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for (i = 1; i < partitions; i++) {
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guint psize = (pdata[2] << 16 | pdata[1] << 8 | pdata[0]);
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pdata += 3;
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self->partition_size[i] = psize;
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self->partition_offset[i + 1] = self->partition_offset[i] + psize;
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}
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/* Check that our partition offsets and sizes don't go outsize the buffer
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* size. */
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if (self->partition_offset[i] >= size)
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goto error;
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self->partition_size[i] = size - self->partition_offset[i];
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self->partition_offset[i + 1] = size;
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gst_buffer_unmap (buffer, &map);
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return TRUE;
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error:
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GST_DEBUG ("Failed to parse frame");
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if (map.memory != NULL) {
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gst_buffer_unmap (buffer, &map);
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}
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return FALSE;
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}
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static guint
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gst_rtp_vp8_offset_to_partition (GstRtpVP8Pay * self, guint offset)
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{
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int i;
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for (i = 1; i < self->n_partitions; i++) {
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if (offset < self->partition_offset[i])
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return i - 1;
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}
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return i - 1;
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}
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static gsize
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gst_rtp_vp8_calc_header_len (GstRtpVP8Pay * self)
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{
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switch (self->picture_id_mode) {
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case VP8_PAY_PICTURE_ID_7BITS:
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return 3;
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case VP8_PAY_PICTURE_ID_15BITS:
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return 4;
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case VP8_PAY_NO_PICTURE_ID:
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default:
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return 1;
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}
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}
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/* When growing the vp8 header keep max payload len calculation in sync */
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static GstBuffer *
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gst_rtp_vp8_create_header_buffer (GstRtpVP8Pay * self, guint8 partid,
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gboolean start, gboolean mark, GstBuffer * in)
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{
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GstBuffer *out;
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guint8 *p;
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GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
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out =
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gst_rtp_base_payload_allocate_output_buffer (GST_RTP_BASE_PAYLOAD_CAST
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(self), gst_rtp_vp8_calc_header_len (self), 0, 0);
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gst_rtp_buffer_map (out, GST_MAP_READWRITE, &rtpbuffer);
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p = gst_rtp_buffer_get_payload (&rtpbuffer);
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/* X=0,R=0,N=0,S=start,PartID=partid */
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p[0] = (start << 4) | partid;
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if (self->picture_id_mode != VP8_PAY_NO_PICTURE_ID) {
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/* Enable X=1 */
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p[0] |= 0x80;
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/* X: I=1,L=0,T=0,K=0,RSV=0 */
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p[1] = 0x80;
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if (self->picture_id_mode == VP8_PAY_PICTURE_ID_7BITS) {
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/* I: 7 bit picture_id */
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p[2] = self->picture_id & 0x7F;
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} else {
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/* I: 15 bit picture_id */
|
|
p[2] = 0x80 | ((self->picture_id & 0x7FFF) >> 8);
|
|
p[3] = self->picture_id & 0xFF;
|
|
}
|
|
}
|
|
|
|
gst_rtp_buffer_set_marker (&rtpbuffer, mark);
|
|
|
|
gst_rtp_buffer_unmap (&rtpbuffer);
|
|
|
|
GST_BUFFER_DURATION (out) = GST_BUFFER_DURATION (in);
|
|
GST_BUFFER_PTS (out) = GST_BUFFER_PTS (in);
|
|
|
|
return out;
|
|
}
|
|
|
|
static guint
|
|
gst_rtp_vp8_payload_next (GstRtpVP8Pay * self, GstBufferList * list,
|
|
guint offset, GstBuffer * buffer, gsize buffer_size, gsize max_payload_len)
|
|
{
|
|
guint partition;
|
|
GstBuffer *header;
|
|
GstBuffer *sub;
|
|
GstBuffer *out;
|
|
gboolean mark;
|
|
gsize remaining;
|
|
gsize available;
|
|
|
|
remaining = buffer_size - offset;
|
|
available = max_payload_len;
|
|
if (available > remaining)
|
|
available = remaining;
|
|
|
|
partition = gst_rtp_vp8_offset_to_partition (self, offset);
|
|
g_assert (partition < self->n_partitions);
|
|
|
|
mark = (remaining == available);
|
|
/* whole set of partitions, payload them and done */
|
|
header = gst_rtp_vp8_create_header_buffer (self, partition,
|
|
offset == self->partition_offset[partition], mark, buffer);
|
|
sub = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL, offset, available);
|
|
|
|
gst_rtp_copy_video_meta (self, header, buffer);
|
|
|
|
out = gst_buffer_append (header, sub);
|
|
|
|
gst_buffer_list_insert (list, -1, out);
|
|
|
|
return available;
|
|
}
|
|
|
|
|
|
static GstFlowReturn
|
|
gst_rtp_vp8_pay_handle_buffer (GstRTPBasePayload * payload, GstBuffer * buffer)
|
|
{
|
|
GstRtpVP8Pay *self = GST_RTP_VP8_PAY (payload);
|
|
GstFlowReturn ret;
|
|
GstBufferList *list;
|
|
gsize size, max_paylen;
|
|
guint offset, mtu, vp8_hdr_len;
|
|
|
|
size = gst_buffer_get_size (buffer);
|
|
|
|
if (G_UNLIKELY (!gst_rtp_vp8_pay_parse_frame (self, buffer, size))) {
|
|
GST_ELEMENT_ERROR (self, STREAM, ENCODE, (NULL),
|
|
("Failed to parse VP8 frame"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
mtu = GST_RTP_BASE_PAYLOAD_MTU (payload);
|
|
vp8_hdr_len = gst_rtp_vp8_calc_header_len (self);
|
|
max_paylen = gst_rtp_buffer_calc_payload_len (mtu - vp8_hdr_len, 0,
|
|
gst_rtp_base_payload_get_source_count (payload, buffer));
|
|
|
|
list = gst_buffer_list_new_sized ((size / max_paylen) + 1);
|
|
|
|
offset = 0;
|
|
while (offset < size) {
|
|
offset +=
|
|
gst_rtp_vp8_payload_next (self, list, offset, buffer, size, max_paylen);
|
|
}
|
|
|
|
ret = gst_rtp_base_payload_push_list (payload, list);
|
|
|
|
gst_rtp_vp8_pay_picture_id_increment (self);
|
|
|
|
gst_buffer_unref (buffer);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_vp8_pay_sink_event (GstRTPBasePayload * payload, GstEvent * event)
|
|
{
|
|
GstRtpVP8Pay *self = GST_RTP_VP8_PAY (payload);
|
|
|
|
if (GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_START) {
|
|
gst_rtp_vp8_pay_picture_id_reset (self);
|
|
}
|
|
|
|
return GST_RTP_BASE_PAYLOAD_CLASS (gst_rtp_vp8_pay_parent_class)->sink_event
|
|
(payload, event);
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_vp8_pay_set_caps (GstRTPBasePayload * payload, GstCaps * caps)
|
|
{
|
|
GstCaps *src_caps;
|
|
const char *encoding_name = "VP8";
|
|
|
|
src_caps = gst_pad_get_allowed_caps (GST_RTP_BASE_PAYLOAD_SRCPAD (payload));
|
|
if (src_caps) {
|
|
GstStructure *s;
|
|
const GValue *value;
|
|
|
|
s = gst_caps_get_structure (src_caps, 0);
|
|
|
|
if (gst_structure_has_field (s, "encoding-name")) {
|
|
GValue default_value = G_VALUE_INIT;
|
|
|
|
g_value_init (&default_value, G_TYPE_STRING);
|
|
g_value_set_static_string (&default_value, encoding_name);
|
|
|
|
value = gst_structure_get_value (s, "encoding-name");
|
|
if (!gst_value_can_intersect (&default_value, value))
|
|
encoding_name = "VP8-DRAFT-IETF-01";
|
|
}
|
|
gst_caps_unref (src_caps);
|
|
}
|
|
|
|
gst_rtp_base_payload_set_options (payload, "video", TRUE,
|
|
encoding_name, 90000);
|
|
|
|
return gst_rtp_base_payload_set_outcaps (payload, NULL);
|
|
}
|
|
|
|
gboolean
|
|
gst_rtp_vp8_pay_plugin_init (GstPlugin * plugin)
|
|
{
|
|
return gst_element_register (plugin, "rtpvp8pay",
|
|
GST_RANK_MARGINAL, GST_TYPE_RTP_VP8_PAY);
|
|
}
|