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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Use gst_rtp_base_payload_allocate_output_buffer() instead of gst_rtp_buffer_new_allocate() in order to allocate RTP buffer with correct number of CSRCs according to the meta. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/612>
567 lines
17 KiB
C
567 lines
17 KiB
C
/*
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* gstrtpvp9pay.c - Source for GstRtpVP9Pay
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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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* Copyright (C) 2015 Stian Selnes <stian@pexip.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 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 "gstrtpvp9pay.h"
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#include "gstrtputils.h"
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GST_DEBUG_CATEGORY_STATIC (gst_rtp_vp9_pay_debug);
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#define GST_CAT_DEFAULT gst_rtp_vp9_pay_debug
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#define DEFAULT_PICTURE_ID_MODE VP9_PAY_NO_PICTURE_ID
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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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};
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#define GST_TYPE_RTP_VP9_PAY_PICTURE_ID_MODE (gst_rtp_vp9_pay_picture_id_mode_get_type())
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static GType
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gst_rtp_vp9_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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{VP9_PAY_NO_PICTURE_ID, "No Picture ID", "none"},
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{VP9_PAY_PICTURE_ID_7BITS, "7-bit Picture ID", "7-bit"},
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{VP9_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 ("GstVP9RTPPayMode", modes);
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}
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return mode_type;
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}
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static void gst_rtp_vp9_pay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_rtp_vp9_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_vp9_pay_handle_buffer (GstRTPBasePayload * payload,
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GstBuffer * buffer);
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static gboolean gst_rtp_vp9_pay_sink_event (GstRTPBasePayload * payload,
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GstEvent * event);
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static gboolean gst_rtp_vp9_pay_set_caps (GstRTPBasePayload * payload,
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GstCaps * caps);
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G_DEFINE_TYPE (GstRtpVP9Pay, gst_rtp_vp9_pay, GST_TYPE_RTP_BASE_PAYLOAD);
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static GstStaticPadTemplate gst_rtp_vp9_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) { \"VP9\", \"VP9-DRAFT-IETF-01\" }"));
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static GstStaticPadTemplate gst_rtp_vp9_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-vp9"));
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static void
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gst_rtp_vp9_pay_init (GstRtpVP9Pay * obj)
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{
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obj->picture_id_mode = DEFAULT_PICTURE_ID_MODE;
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if (obj->picture_id_mode == VP9_PAY_PICTURE_ID_7BITS)
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obj->picture_id = g_random_int_range (0, G_MAXUINT8) & 0x7F;
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else if (obj->picture_id_mode == VP9_PAY_PICTURE_ID_15BITS)
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obj->picture_id = g_random_int_range (0, G_MAXUINT16) & 0x7FFF;
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}
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static void
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gst_rtp_vp9_pay_class_init (GstRtpVP9PayClass * gst_rtp_vp9_pay_class)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (gst_rtp_vp9_pay_class);
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GstElementClass *element_class = GST_ELEMENT_CLASS (gst_rtp_vp9_pay_class);
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GstRTPBasePayloadClass *pay_class =
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GST_RTP_BASE_PAYLOAD_CLASS (gst_rtp_vp9_pay_class);
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gobject_class->set_property = gst_rtp_vp9_pay_set_property;
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gobject_class->get_property = gst_rtp_vp9_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_VP9_PAY_PICTURE_ID_MODE, DEFAULT_PICTURE_ID_MODE,
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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_vp9_pay_sink_template);
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gst_element_class_add_static_pad_template (element_class,
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&gst_rtp_vp9_pay_src_template);
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gst_element_class_set_static_metadata (element_class, "RTP VP9 payloader",
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"Codec/Payloader/Network/RTP",
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"Puts VP9 video in RTP packets)", "Stian Selnes <stian@pexip.com>");
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pay_class->handle_buffer = gst_rtp_vp9_pay_handle_buffer;
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pay_class->sink_event = gst_rtp_vp9_pay_sink_event;
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pay_class->set_caps = gst_rtp_vp9_pay_set_caps;
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GST_DEBUG_CATEGORY_INIT (gst_rtp_vp9_pay_debug, "rtpvp9pay", 0,
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"VP9 Video RTP Payloader");
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gst_type_mark_as_plugin_api (GST_TYPE_RTP_VP9_PAY_PICTURE_ID_MODE, 0);
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}
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static void
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gst_rtp_vp9_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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GstRtpVP9Pay *rtpvp9pay = GST_RTP_VP9_PAY (object);
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switch (prop_id) {
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case PROP_PICTURE_ID_MODE:
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rtpvp9pay->picture_id_mode = g_value_get_enum (value);
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if (rtpvp9pay->picture_id_mode == VP9_PAY_PICTURE_ID_7BITS)
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rtpvp9pay->picture_id = g_random_int_range (0, G_MAXUINT8) & 0x7F;
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else if (rtpvp9pay->picture_id_mode == VP9_PAY_PICTURE_ID_15BITS)
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rtpvp9pay->picture_id = g_random_int_range (0, G_MAXUINT16) & 0x7FFF;
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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_vp9_pay_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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GstRtpVP9Pay *rtpvp9pay = GST_RTP_VP9_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, rtpvp9pay->picture_id_mode);
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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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#define VP9_PROFILE_0 0
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#define VP9_PROFILE_1 1
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#define VP9_PROFILE_2 2
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#define VP9_PROFILE_3 3
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#define VP9_FRAME_MARKER 0x2
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#define VPX_CS_SRGB 7
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static gboolean
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gst_rtp_vp9_pay_parse_frame (GstRtpVP9Pay * 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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gboolean keyframe;
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guint32 tmp, profile;
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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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/* frame marker */
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if (!gst_bit_reader_get_bits_uint32 (&reader, &tmp, 2)
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|| tmp != VP9_FRAME_MARKER)
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goto error;
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/* profile, variable length */
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if (!gst_bit_reader_get_bits_uint32 (&reader, &profile, 2))
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goto error;
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if (profile > 2) {
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if (!gst_bit_reader_get_bits_uint32 (&reader, &tmp, 1))
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goto error;
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profile += tmp;
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}
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/* show existing frame */
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if (!gst_bit_reader_get_bits_uint32 (&reader, &tmp, 1))
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goto error;
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if (tmp) {
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if (!gst_bit_reader_skip (&reader, 3))
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goto error;
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return TRUE;
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}
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/* frame type */
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if (!gst_bit_reader_get_bits_uint32 (&reader, &tmp, 1))
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goto error;
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self->is_keyframe = keyframe = (tmp == 0);
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/* show frame and resilient mode */
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if (!gst_bit_reader_skip (&reader, 2))
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goto error;
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if (keyframe) {
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/* sync code */
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const guint32 sync_code = 0x498342;
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if (!gst_bit_reader_get_bits_uint32 (&reader, &tmp, 24))
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goto error;
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if (tmp != sync_code)
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goto error;
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if (profile >= VP9_PROFILE_2) {
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/* bit depth */
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if (!gst_bit_reader_skip (&reader, 1))
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goto error;
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}
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/* color space */
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if (!gst_bit_reader_get_bits_uint32 (&reader, &tmp, 3))
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goto error;
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if (tmp != VPX_CS_SRGB) {
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/* color range */
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if (!gst_bit_reader_skip (&reader, 1))
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goto error;
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if (profile == VP9_PROFILE_1 || profile == VP9_PROFILE_3) {
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/* subsampling + reserved bit */
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if (!gst_bit_reader_skip (&reader, 2 + 1))
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goto error;
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}
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} else {
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if (profile == VP9_PROFILE_1 || profile == VP9_PROFILE_3)
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/* reserved bit */
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if (!gst_bit_reader_skip (&reader, 1))
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goto error;
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}
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/* frame size */
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if (!gst_bit_reader_get_bits_uint32 (&reader, &tmp, 16))
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goto error;
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self->width = tmp + 1;
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if (!gst_bit_reader_get_bits_uint32 (&reader, &tmp, 16))
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goto error;
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self->height = tmp + 1;
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/* render size */
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if (!gst_bit_reader_get_bits_uint32 (&reader, &tmp, 1))
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goto error;
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if (tmp) {
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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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GST_INFO_OBJECT (self, "parsed width=%d height=%d", self->width,
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self->height);
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}
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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 gsize
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gst_rtp_vp9_calc_header_len (GstRtpVP9Pay * self, gboolean start)
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{
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gsize len = 1;
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switch (self->picture_id_mode) {
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case VP9_PAY_PICTURE_ID_7BITS:
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len += 1;
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break;
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case VP9_PAY_PICTURE_ID_15BITS:
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len += 2;
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default:
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break;
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}
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/* Assume non-flexible mode */
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/* Assume L-bit not set, no L header */
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if (self->is_keyframe && start) {
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/* Assume V-bit set */
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/* FIXME: SS depends on layers and prediction structure */
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/* For now assume 1 spatial and 1 temporal layer. */
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/* FIXME: Only for the first packet in the key frame */
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len += 8;
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}
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return len;
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}
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/* VP9 RTP header, non-flexible mode:
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0 1 2 3 4 5 6 7
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+-+-+-+-+-+-+-+-+
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|I|P|L|F|B|E|V|-| (REQUIRED)
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+-+-+-+-+-+-+-+-+
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I: |M| PICTURE ID | (RECOMMENDED)
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+-+-+-+-+-+-+-+-+
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M: | EXTENDED PID | (RECOMMENDED)
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+-+-+-+-+-+-+-+-+
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L: | T |U| S |D| (CONDITIONALLY RECOMMENDED)
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+-+-+-+-+-+-+-+-+ -\
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P,F: | P_DIFF |X|N| (CONDITIONALLY RECOMMENDED) .
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+-+-+-+-+-+-+-+-+ . - up to 3 times
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X: |EXTENDED P_DIFF| (OPTIONAL) .
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+-+-+-+-+-+-+-+-+ -/
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V: | SS |
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| .. |
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+-+-+-+-+-+-+-+-+
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Scalability structure (SS)
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(from https://chromium.googlesource.com/external/webrtc/+/HEAD/webrtc/modules/rtp_rtcp/source/rtp_format_vp9.cc
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since latest draft is not up to date with chromium)
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+-+-+-+-+-+-+-+-+
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V: | N_S |Y|G|-|-|-|
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+-+-+-+-+-+-+-+-+ -|
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Y: | WIDTH | (OPTIONAL) .
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+ + .
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| | (OPTIONAL) .
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+-+-+-+-+-+-+-+-+ . N_S + 1 times
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| HEIGHT | (OPTIONAL) .
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+ + .
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| | (OPTIONAL) .
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+-+-+-+-+-+-+-+-+ -|
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G: | N_G | (OPTIONAL)
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+-+-+-+-+-+-+-+-+ -|
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N_G: | T |U| R |-|-| (OPTIONAL) .
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+-+-+-+-+-+-+-+-+ -| . N_G times
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| P_DIFF | (OPTIONAL) . R times .
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+-+-+-+-+-+-+-+-+ -| -|
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**/
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/* When growing the vp9 header keep max payload len calculation in sync */
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static GstBuffer *
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gst_rtp_vp9_create_header_buffer (GstRtpVP9Pay * self,
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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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guint off = 1;
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guint hdrlen = gst_rtp_vp9_calc_header_len (self, start);
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out =
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gst_rtp_base_payload_allocate_output_buffer (GST_RTP_BASE_PAYLOAD (self),
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hdrlen, 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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p[0] = 0x0;
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if (self->picture_id_mode != VP9_PAY_NO_PICTURE_ID) {
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p[0] |= 0x80;
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if (self->picture_id_mode == VP9_PAY_PICTURE_ID_7BITS) {
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/* M=0 */
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p[off++] = self->picture_id & 0x7F;
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} else {
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/* M=1 */
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p[off++] = 0x80 | ((self->picture_id & 0x7FFF) >> 8);
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p[off++] = self->picture_id & 0xFF;
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}
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}
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if (!self->is_keyframe)
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p[0] |= 0x40;
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if (start)
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p[0] |= 0x08;
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if (mark)
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p[0] |= 0x04;
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if (self->is_keyframe && start) {
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p[0] |= 0x02;
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/* scalability structure, hard coded for now to be similar to chromium for
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* quick and dirty interop */
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p[off++] = 0x18; /* N_S=0 Y=1 G=1 */
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p[off++] = self->width >> 8;
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p[off++] = self->width & 0xFF;
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p[off++] = self->height >> 8;
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p[off++] = self->height & 0xFF;
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p[off++] = 0x01; /* N_G=1 */
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p[off++] = 0x04; /* T=0, U=0, R=1 */
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p[off++] = 0x01; /* P_DIFF=1 */
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}
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g_assert_cmpint (off, ==, hdrlen);
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gst_rtp_buffer_set_marker (&rtpbuffer, mark);
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gst_rtp_buffer_unmap (&rtpbuffer);
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GST_BUFFER_DURATION (out) = GST_BUFFER_DURATION (in);
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GST_BUFFER_PTS (out) = GST_BUFFER_PTS (in);
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return out;
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}
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static guint
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gst_rtp_vp9_payload_next (GstRtpVP9Pay * self, GstBufferList * list,
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guint offset, GstBuffer * buffer, gsize buffer_size, gsize max_payload_len)
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{
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GstBuffer *header;
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GstBuffer *sub;
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GstBuffer *out;
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gboolean mark;
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gsize remaining;
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gsize available;
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remaining = buffer_size - offset;
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available = max_payload_len;
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if (available > remaining)
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available = remaining;
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mark = (remaining == available);
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|
header = gst_rtp_vp9_create_header_buffer (self, offset == 0, 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_vp9_pay_handle_buffer (GstRTPBasePayload * payload, GstBuffer * buffer)
|
|
{
|
|
GstRtpVP9Pay *self = GST_RTP_VP9_PAY (payload);
|
|
GstFlowReturn ret;
|
|
GstBufferList *list;
|
|
gsize size, max_paylen;
|
|
guint offset, mtu, vp9_hdr_len;
|
|
|
|
size = gst_buffer_get_size (buffer);
|
|
|
|
if (G_UNLIKELY (!gst_rtp_vp9_pay_parse_frame (self, buffer, size))) {
|
|
GST_ELEMENT_ERROR (self, STREAM, ENCODE, (NULL),
|
|
("Failed to parse VP9 frame"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
mtu = GST_RTP_BASE_PAYLOAD_MTU (payload);
|
|
vp9_hdr_len = gst_rtp_vp9_calc_header_len (self, TRUE);
|
|
max_paylen = gst_rtp_buffer_calc_payload_len (mtu - vp9_hdr_len, 0, 0);
|
|
|
|
list = gst_buffer_list_new_sized ((size / max_paylen) + 1);
|
|
|
|
offset = 0;
|
|
while (offset < size) {
|
|
offset +=
|
|
gst_rtp_vp9_payload_next (self, list, offset, buffer, size, max_paylen);
|
|
}
|
|
|
|
ret = gst_rtp_base_payload_push_list (payload, list);
|
|
|
|
/* Incremenent and wrap the picture id if it overflows */
|
|
if ((self->picture_id_mode == VP9_PAY_PICTURE_ID_7BITS &&
|
|
++self->picture_id >= 0x80) ||
|
|
(self->picture_id_mode == VP9_PAY_PICTURE_ID_15BITS &&
|
|
++self->picture_id >= 0x8000))
|
|
self->picture_id = 0;
|
|
|
|
gst_buffer_unref (buffer);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_vp9_pay_sink_event (GstRTPBasePayload * payload, GstEvent * event)
|
|
{
|
|
GstRtpVP9Pay *self = GST_RTP_VP9_PAY (payload);
|
|
|
|
if (GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_START) {
|
|
if (self->picture_id_mode == VP9_PAY_PICTURE_ID_7BITS)
|
|
self->picture_id = g_random_int_range (0, G_MAXUINT8) & 0x7F;
|
|
else if (self->picture_id_mode == VP9_PAY_PICTURE_ID_15BITS)
|
|
self->picture_id = g_random_int_range (0, G_MAXUINT16) & 0x7FFF;
|
|
}
|
|
|
|
return GST_RTP_BASE_PAYLOAD_CLASS (gst_rtp_vp9_pay_parent_class)->sink_event
|
|
(payload, event);
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_vp9_pay_set_caps (GstRTPBasePayload * payload, GstCaps * caps)
|
|
{
|
|
GstCaps *src_caps;
|
|
const char *encoding_name = "VP9";
|
|
|
|
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 = "VP9-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_vp9_pay_plugin_init (GstPlugin * plugin)
|
|
{
|
|
return gst_element_register (plugin, "rtpvp9pay",
|
|
GST_RANK_MARGINAL, GST_TYPE_RTP_VP9_PAY);
|
|
}
|