gstreamer/subprojects/gst-plugins-bad/ext/avtp/gstavtprvfpay.c

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/*
* GStreamer AVTP Plugin
* Copyright (c) 2021, Fastree3D
* Adrian Fiergolski <Adrian.Fiergolski@fastree3d.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
/**
* SECTION:element-avtprvfpay
* @see_also: avtprvfdepay
*
* Payload raw video into AVTPDUs according
* to IEEE 1722-2016. For detailed information see
* https://standards.ieee.org/standard/1722-2016.html.
*
* <refsect2>
* <title>Example pipeline</title>
* |[
* gst-launch-1.0 videotestsrc ! avtprvfpay ! avtpsink
* ]| This example pipeline will payload raw video. Refer to the avtprvfdepay
* example to depayload and play the AVTP stream.
* </refsect2>
* Since: 1.24
*/
#include <avtp.h>
#include <avtp_rvf.h>
#include <gst/video/video.h>
#include "gstavtprvfpay.h"
GST_DEBUG_CATEGORY_STATIC (avtprvfpay_debug);
#define GST_CAT_DEFAULT avtprvfpay_debug
/* prototypes */
static GstStateChangeReturn gst_avtp_rvf_change_state (GstElement *
element, GstStateChange transition);
static gboolean gst_avtp_rvf_pay_new_caps (GstAvtpVfPayBase * avtpvfpaybase,
GstCaps * caps);
static gboolean gst_avtp_rvf_pay_prepare_avtp_packets (GstAvtpVfPayBase *
avtpvfpaybase, GstBuffer * buffer, GPtrArray * avtp_packets);
enum
{
PROP_0,
};
#define AVTP_RVF_HEADER_SIZE (sizeof(struct avtp_stream_pdu) + sizeof(uint64_t))
/* pad templates */
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{GRAY16_LE}"))
);
/* class initialization */
#define gst_avtp_rvf_pay_parent_class parent_class
G_DEFINE_TYPE (GstAvtpRvfPay, gst_avtp_rvf_pay, GST_TYPE_AVTP_VF_PAY_BASE);
GST_ELEMENT_REGISTER_DEFINE (avtprvfpay, "avtprvfpay", GST_RANK_NONE,
GST_TYPE_AVTP_RVF_PAY);
static void
gst_avtp_rvf_pay_class_init (GstAvtpRvfPayClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GstAvtpVfPayBaseClass *avtpvfpaybase_class =
GST_AVTP_VF_PAY_BASE_CLASS (klass);
gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
gst_element_class_set_static_metadata (gstelement_class,
"AVTP Raw Video Format (RVF) payloader",
"Codec/Payloader/Network/AVTP",
"Payload-encode raw video into RVF AVTPDU (IEEE 1722)",
"Adrian Fiergolski <Adrian.Fiergolski@fastree3d.com>");
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_avtp_rvf_change_state);
avtpvfpaybase_class->new_caps = GST_DEBUG_FUNCPTR (gst_avtp_rvf_pay_new_caps);
avtpvfpaybase_class->prepare_avtp_packets =
GST_DEBUG_FUNCPTR (gst_avtp_rvf_pay_prepare_avtp_packets);
GST_DEBUG_CATEGORY_INIT (avtprvfpay_debug, "avtprvfpay",
0, "debug category for avtprvfpay element");
}
static void
gst_avtp_rvf_pay_init (GstAvtpRvfPay * avtprvfpay)
{
avtprvfpay->header = NULL;
/* size of the payload */
avtprvfpay->fragment_size = 0;
/* large raster: number of data bytes for a fragment at the end of line */
avtprvfpay->fragment_eol_size = 0;
avtprvfpay->fragment_padding = NULL;
avtprvfpay->num_lines = 0;
/* size of the line in bytes */
avtprvfpay->line_size = 0;
/* large raster: maximum i_seq_num */
avtprvfpay->i_seq_max = 0;
}
static gboolean
gst_avtp_rvf_pay_new_caps (GstAvtpVfPayBase * avtpvfpaybase, GstCaps * caps)
{
GstAvtpRvfPay *avtprvfpay = GST_AVTP_RVF_PAY (avtpvfpaybase);
GstMapInfo map;
struct avtp_stream_pdu *pdu;
GstVideoInfo info;
unsigned int fps_up, fps_down;
gboolean ret = FALSE;
gsize fragment_padding_size;
GST_DEBUG_OBJECT (avtprvfpay, "gst_avtp_rvf_pay_new_caps");
gst_buffer_map (avtprvfpay->header, &map, GST_MAP_WRITE);
pdu = (struct avtp_stream_pdu *) map.data;
if (!gst_video_info_from_caps (&info, caps)) {
GST_ERROR_OBJECT (avtprvfpay,
"Can't retrieve the video information from caps");
goto error;
}
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_ACTIVE_PIXELS, info.width);
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_TOTAL_LINES, info.height);
switch (info.interlace_mode) {
case GST_VIDEO_INTERLACE_MODE_PROGRESSIVE:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_I, 0);
break;
/* to-do: support for interleaved modes */
case GST_VIDEO_INTERLACE_MODE_INTERLEAVED:
case GST_VIDEO_INTERLACE_MODE_FIELDS:
case GST_VIDEO_INTERLACE_MODE_ALTERNATE:
default:
GST_ERROR_OBJECT (avtprvfpay, "Unsupported interlace mode");
goto error;
}
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_F, 0);
switch (*info.finfo->depth) {
case 8:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_PIXEL_DEPTH,
AVTP_RVF_PIXEL_DEPTH_8);
break;
case 16:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_PIXEL_DEPTH,
AVTP_RVF_PIXEL_DEPTH_16);
break;
/* to-do: add support for 10 and 12 bit pixel depth
* it requires shifting of the buffer data */
case 10:
case 12:
default:
GST_ERROR_OBJECT (avtprvfpay, "Unsupported pixel depth");
goto error;
}
if (info.finfo->n_planes != 1) {
GST_ERROR_OBJECT (avtprvfpay, "Planar formats are not supported");
goto error;
}
//All pixels are active
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_AP, 1);
switch (info.finfo->format) {
case GST_VIDEO_FORMAT_GRAY16_LE:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_PIXEL_FORMAT,
AVTP_RVF_PIXEL_FORMAT_MONO);
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_COLORSPACE,
AVTP_RVF_COLORSPACE_GRAY);
break;
/* to-do: support more formats */
default:
GST_ERROR_OBJECT (avtprvfpay, "Unsupported video format");
goto error;
}
avtprvfpay->line_size =
(info.finfo->n_components * (*info.finfo->depth) * info.width) / 8;
//video_data_payload field for large rasters
if (avtprvfpay->line_size > avtpvfpaybase->mtu - AVTP_RVF_HEADER_SIZE) {
avtprvfpay->num_lines = 0;
avtprvfpay->fragment_size = avtpvfpaybase->mtu - AVTP_RVF_HEADER_SIZE;
avtprvfpay->fragment_eol_size =
avtprvfpay->line_size % avtprvfpay->fragment_size;
avtprvfpay->i_seq_max = avtprvfpay->line_size / avtprvfpay->fragment_size;
fragment_padding_size =
avtprvfpay->fragment_size - avtprvfpay->fragment_eol_size;
}
//video_data_payload field for small rasters
else {
//only full lines
avtprvfpay->num_lines =
(avtpvfpaybase->mtu - AVTP_RVF_HEADER_SIZE) / avtprvfpay->line_size;
//Full video frame is smaller than MTU
if (avtprvfpay->num_lines > info.height)
avtprvfpay->num_lines = info.height;
//num_lines field is 4 bit only
if (avtprvfpay->num_lines > 15)
avtprvfpay->num_lines = 15;
avtprvfpay->fragment_size = avtprvfpay->num_lines * avtprvfpay->line_size;
avtprvfpay->fragment_eol_size = 0;
avtprvfpay->i_seq_max = 0;
fragment_padding_size =
avtprvfpay->fragment_size -
((info.height % avtprvfpay->num_lines) * avtprvfpay->line_size);
}
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_NUM_LINES, avtprvfpay->num_lines);
//FPS
fps_down = info.fps_n / info.fps_d; //Round down
fps_up = (info.fps_n + (info.fps_d - 1)) / info.fps_d; //Round up
if (fps_down == fps_up) {
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_PD, 0);
} else {
if ((info.fps_n * 1001) == info.fps_d * 1000 * fps_up)
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_PD, 1);
else
GST_ERROR_OBJECT (avtprvfpay, "Unsupported frame rate");
goto error;
}
switch (fps_up) {
case 1:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_1);
break;
case 2:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_2);
break;
case 5:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_5);
break;
case 10:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_10);
break;
case 15:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_15);
break;
case 20:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_20);
break;
case 24:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_24);
break;
case 25:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_25);
break;
case 30:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_30);
break;
case 48:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_48);
break;
case 50:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_50);
break;
case 60:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_60);
break;
case 72:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_72);
break;
case 85:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_85);
break;
case 100:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_100);
break;
case 120:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_120);
break;
case 150:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_150);
break;
case 200:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_200);
break;
case 240:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_240);
break;
case 300:
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_FRAME_RATE,
AVTP_RVF_FRAME_RATE_300);
break;
default:
GST_ERROR_OBJECT (avtprvfpay, "Unsupported frame rate");
goto error;
}
//padding bytes
avtprvfpay->fragment_padding = gst_buffer_new_allocate (NULL,
fragment_padding_size, NULL);
if (G_UNLIKELY (avtprvfpay->fragment_padding == NULL)) {
GST_ERROR_OBJECT (avtprvfpay,
"Could not allocate memory for padding bytes");
goto error;
}
gst_buffer_memset (avtprvfpay->fragment_padding, 0, 0U,
fragment_padding_size);
ret = TRUE;
error:
gst_buffer_unmap (avtprvfpay->header, &map);
return ret;
}
static GstStateChangeReturn
gst_avtp_rvf_change_state (GstElement * element, GstStateChange transition)
{
GstAvtpRvfPay *avtprvfpay = GST_AVTP_RVF_PAY (element);
GstAvtpBasePayload *avtpbasepayload = GST_AVTP_BASE_PAYLOAD (avtprvfpay);
GstStateChangeReturn ret;
if (transition == GST_STATE_CHANGE_NULL_TO_READY) {
GstMapInfo map;
struct avtp_stream_pdu *pdu;
int res;
avtprvfpay->header = gst_buffer_new_allocate (NULL,
AVTP_RVF_HEADER_SIZE, NULL);
if (avtprvfpay->header == NULL) {
GST_ERROR_OBJECT (avtprvfpay, "Could not allocate buffer");
return GST_STATE_CHANGE_FAILURE;
}
gst_buffer_map (avtprvfpay->header, &map, GST_MAP_WRITE);
pdu = (struct avtp_stream_pdu *) map.data;
res = avtp_rvf_pdu_init (pdu);
g_assert (res == 0);
res =
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_STREAM_ID,
avtpbasepayload->streamid);
g_assert (res == 0);
gst_buffer_unmap (avtprvfpay->header, &map);
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE) {
return ret;
}
if (transition == GST_STATE_CHANGE_READY_TO_NULL) {
gst_buffer_unref (avtprvfpay->header);
}
return ret;
}
/* Checks if stream is large raster video (see: 12.2.9) */
static gboolean
is_large_raster (GstAvtpRvfPay * avtprvfpay)
{
return avtprvfpay->num_lines == 0;
}
static gboolean
gst_avtp_rvf_pay_prepare_avtp_packets (GstAvtpVfPayBase * avtpvfpaybase,
GstBuffer * buffer, GPtrArray * avtp_packets)
{
GstAvtpBasePayload *avtpbasepayload = GST_AVTP_BASE_PAYLOAD (avtpvfpaybase);
GstAvtpRvfPay *avtprvfpay = GST_AVTP_RVF_PAY (avtpvfpaybase);
GstBuffer *header;
GstMapInfo map;
guint64 avtp_time;
gsize offset, buffer_size;
gsize i_seq_num, line_number;
GST_LOG_OBJECT (avtprvfpay,
"Preparing AVTP packets for video frame whose size is %" G_GSIZE_FORMAT,
gst_buffer_get_size (buffer));
/* Calculate timestamps using PTS as base
* - code inherited from avtpbasepayload.
* Also worth noting: `avtpbasepayload->latency` is updated after
* first call to gst_avtp_base_payload_calc_ptime, so we MUST call
* it before using the latency value */
avtp_time = gst_avtp_base_payload_calc_ptime (avtpbasepayload, buffer);
offset = 0;
buffer_size = gst_buffer_get_size (buffer);
i_seq_num = 0;
line_number = 1;
while (offset != buffer_size) {
GstBuffer *packet;
struct avtp_stream_pdu *pdu;
gint res;
GstBuffer *fragment;
gsize fragment_size;
/* Copy header to reuse common fields and change what is needed */
header = gst_buffer_copy (avtprvfpay->header);
gst_buffer_map (header, &map, GST_MAP_WRITE);
pdu = (struct avtp_stream_pdu *) map.data;
/* Prepare the fragment */
if (is_large_raster (avtprvfpay)) {
if (i_seq_num == avtprvfpay->i_seq_max)
fragment_size = avtprvfpay->fragment_eol_size;
else
fragment_size = avtprvfpay->fragment_size;
} else {
guint reamaining_size = buffer_size - offset;
if (reamaining_size < avtprvfpay->fragment_size)
fragment_size = reamaining_size;
else
fragment_size = avtprvfpay->fragment_size;
}
fragment = gst_buffer_copy_region (buffer,
GST_BUFFER_COPY_MEMORY, offset, fragment_size);
offset += fragment_size;
/* video_data_payload is always the same size
* so add padding bytes if needed */
if (fragment_size != avtprvfpay->fragment_size) {
fragment = gst_buffer_append (fragment, avtprvfpay->fragment_padding);
}
GST_DEBUG_OBJECT (avtprvfpay,
"Generated fragment with size %" G_GSIZE_FORMAT,
avtprvfpay->fragment_size);
/* Stream data len includes AVTP raw header len as this is part of
* the payload too. It's just the uint64_t */
res =
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_STREAM_DATA_LEN,
avtprvfpay->fragment_size + sizeof (uint64_t));
g_assert (res == 0);
res =
avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_SEQ_NUM,
avtpbasepayload->seqnum++);
g_assert (res == 0);
/* AVTP_TS fields */
if ((is_large_raster (avtprvfpay) && i_seq_num == 0)
|| (!is_large_raster (avtprvfpay)
&& line_number == 1)) {
res = avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_TV, 1);
g_assert (res == 0);
res = avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_TIMESTAMP, avtp_time);
g_assert (res == 0);
GST_LOG_OBJECT (avtprvfpay, "TV packet sent, PTS: %" GST_TIME_FORMAT
" DTS: %" GST_TIME_FORMAT " AVTP_TS: %" GST_TIME_FORMAT,
GST_TIME_ARGS (avtp_time),
GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
GST_TIME_ARGS (avtp_time & 0xffffffff));
}
/* Set ef */
if (offset == buffer_size) { //last fragment
res = avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_EF, 1);
g_assert (res == 0);
}
/* Set line_number */
res = avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_LINE_NUMBER, line_number);
g_assert (res == 0);
if (is_large_raster (avtprvfpay)) {
if (i_seq_num == avtprvfpay->i_seq_max)
line_number++;
} else {
line_number += avtprvfpay->num_lines;
}
/* Handle i_seq_num only for large raster */
if (is_large_raster (avtprvfpay)) {
res = avtp_rvf_pdu_set (pdu, AVTP_RVF_FIELD_RAW_I_SEQ_NUM, i_seq_num);
g_assert (res == 0);
if (i_seq_num < avtprvfpay->i_seq_max)
i_seq_num++;
else
i_seq_num = 0;
}
packet = gst_buffer_append (header, fragment);
/* Keep original timestamps */
GST_BUFFER_PTS (packet) = GST_BUFFER_PTS (buffer);
GST_BUFFER_DTS (packet) = GST_BUFFER_DTS (buffer);
g_ptr_array_add (avtp_packets, packet);
gst_buffer_unmap (header, &map);
}
gst_buffer_unref (buffer);
GST_LOG_OBJECT (avtprvfpay, "Prepared %u AVTP packets", avtp_packets->len);
return TRUE;
}