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avtp: Introduce AAF payloader element

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This patch introduces the AVTP Audio Format (AAF) payloader element from
the AVTP plugin. The element inputs audio raw data and outputs AVTP
packets (aka AVTPDUs), implementing a typical protocol payloader element
from GStreamer.

AAF is one of the available formats to transport audio data in an AVTP
system. AAF is specified in IEEE 1722-2016 section 7 and provides two
encapsulation mode: PCM and AES3. This patch implements PCM
encapsulation mode only.

The AAF payloader working mechanism consists of building the AAF header,
prepending it to the GstBuffer received on the sink pad, and pushing the
buffer downstream. Payloader parameters such as stream ID, maximum
transit time, time uncertainty, and timestamping mode are passed via
element properties. AAF doesn't support all possible sample format and
sampling rate values so the sink pad caps template from the payloader is
a subset of audio/x-raw. Additionally, this patch implements only
"normal" timestamping mode from AAF. "Sparse" mode should be implemented
in future.

Upcoming patches will introduce other AVTP payloader elements that will
have some common code. For that reason, this patch introduces the
GstAvtpBasePayload abstract class that implements common payloader
functionalities, and the GstAvtpAafPay class that extends the
GstAvtpBasePayload class, implementing AAF-specific functionalities.

The AAF payloader element is most likely to be used with the AVTP sink
element (to be introduced by a later patch) but it could also be used
with UDP sink element to implement AVTP over UDP as described in IEEE
1722-2016 Annex J.

This element was inspired by RTP payloader elements.
This commit is contained in:
Andre Guedes 2019-01-16 17:16:59 -08:00 committed by Ederson de Souza
parent eaeab383bb
commit 1e985f02f4
7 changed files with 820 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
ext/avtp/Makefile.am
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@ -1,6 +1,9 @@
plugin_LTLIBRARIES = libgstavtp.la
libgstavtp_la_SOURCES = gstavtp.c
libgstavtp_la_SOURCES = \
gstavtp.c \
gstavtpaafpay.c \
gstavtpbasepayload.c
libgstavtp_la_CFLAGS = \
$(GST_PLUGINS_BASE_CFLAGS) \
@ -9,9 +12,13 @@ libgstavtp_la_CFLAGS = \
$(AVTP_CFLAGS)
libgstavtp_la_LIBADD = \
$(GST_PLUGINS_BASE_LIBS) \
$(GST_PLUGINS_BASE_LIBS) -lgstaudio-$(GST_API_VERSION) \
$(GST_BASE_LIBS) \
$(GST_LIBS) \
$(AVTP_LIBS)
libgstavtp_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = \
gstavtpaafpay.h \
gstavtpbasepayload.h

12
ext/avtp/gstavtp.c
View file

@ -36,6 +36,13 @@
*
* If libavtp isn't detected by configure, the plugin isn't built.
*
* ### The application/x-avtp mime type
*
* For valid AVTPDUs encapsulated in GstBuffers, we use the caps with mime type
* application/x-avtp.
*
* AVTP mime type is pretty simple and has no fields.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
@ -43,9 +50,14 @@
#include <gst/gst.h>
#include "gstavtpaafpay.h"
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_avtp_aaf_pay_plugin_init (plugin))
return FALSE;
return TRUE;
}

387
ext/avtp/gstavtpaafpay.c Normal file
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@ -0,0 +1,387 @@
/*
* GStreamer AVTP Plugin
* Copyright (C) 2019 Intel Corporation
*
* 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-avtpaafpay
* @see_also: avtpaafdepay
*
* Payload raw audio 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 audiotestsrc ! audioconvert ! avtpaafpay ! avtpsink
* ]| This example pipeline will payload raw audio. Refer to the avtpaafdepay
* example to depayload and play the AVTP stream.
* </refsect2>
*/
#include <avtp.h>
#include <avtp_aaf.h>
#include <gst/audio/audio-format.h>
#include "gstavtpaafpay.h"
GST_DEBUG_CATEGORY_STATIC (avtpaafpay_debug);
#define GST_CAT_DEFAULT (avtpaafpay_debug)
#define DEFAULT_TSTAMP_MODE GST_AVTP_AAF_TSTAMP_MODE_NORMAL
enum
{
PROP_0,
PROP_TSTAMP_MODE,
};
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw, "
"format = (string) { S16BE, S24BE, S32BE, F32BE }, "
"rate = (int) { 8000, 16000, 24000, 32000, 44100, 48000, 88200, 96000, 176400, 192000 }, "
"channels = " GST_AUDIO_CHANNELS_RANGE ", "
"layout = (string) interleaved")
);
#define GST_TYPE_AVTP_AAF_TSTAMP_MODE (gst_avtp_aaf_tstamp_mode_get_type())
static GType
gst_avtp_aaf_tstamp_mode_get_type (void)
{
static GType tstamp_mode_type = 0;
static const GEnumValue tstamp_mode_types[] = {
{GST_AVTP_AAF_TSTAMP_MODE_NORMAL, "Normal timestamping mode", "normal"},
{GST_AVTP_AAF_TSTAMP_MODE_SPARSE, "Sparse timestamping mode", "sparse"},
{0, NULL, NULL},
};
tstamp_mode_type =
g_enum_register_static ("GstAvtpAafTstampMode", tstamp_mode_types);
return tstamp_mode_type;
}
#define gst_avtp_aaf_pay_parent_class parent_class
G_DEFINE_TYPE (GstAvtpAafPay, gst_avtp_aaf_pay, GST_TYPE_AVTP_BASE_PAYLOAD);
static void gst_avtp_aaf_pay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_avtp_aaf_pay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_avtp_aaf_pay_change_state (GstElement * element,
GstStateChange transition);
static GstFlowReturn gst_avtp_aaf_pay_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer);
static gboolean gst_avtp_aaf_pay_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static void
gst_avtp_aaf_pay_class_init (GstAvtpAafPayClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstAvtpBasePayloadClass *avtpbasepayload_class =
GST_AVTP_BASE_PAYLOAD_CLASS (klass);
object_class->set_property = gst_avtp_aaf_pay_set_property;
object_class->get_property = gst_avtp_aaf_pay_get_property;
g_object_class_install_property (object_class, PROP_TSTAMP_MODE,
g_param_spec_enum ("tstamp-mode", "Timestamping Mode",
"AAF timestamping mode", GST_TYPE_AVTP_AAF_TSTAMP_MODE,
DEFAULT_TSTAMP_MODE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
GST_PARAM_MUTABLE_PAUSED));
element_class->change_state =
GST_DEBUG_FUNCPTR (gst_avtp_aaf_pay_change_state);
gst_element_class_add_static_pad_template (element_class, &sink_template);
gst_element_class_set_static_metadata (element_class,
"AVTP Audio Format (AAF) payloader",
"Codec/Payloader/Network/AVTP",
"Payload-encode Raw audio into AAF AVTPDU (IEEE 1722)",
"Andre Guedes <andre.guedes@intel.com>");
avtpbasepayload_class->chain = GST_DEBUG_FUNCPTR (gst_avtp_aaf_pay_chain);
avtpbasepayload_class->sink_event =
GST_DEBUG_FUNCPTR (gst_avtp_aaf_pay_sink_event);
GST_DEBUG_CATEGORY_INIT (avtpaafpay_debug, "avtpaafpay", 0,
"AAF AVTP Payloader");
}
static void
gst_avtp_aaf_pay_init (GstAvtpAafPay * avtpaafpay)
{
avtpaafpay->tstamp_mode = DEFAULT_TSTAMP_MODE;
avtpaafpay->header = NULL;
avtpaafpay->channels = 0;
avtpaafpay->depth = 0;
avtpaafpay->rate = 0;
avtpaafpay->format = 0;
}
static void
gst_avtp_aaf_pay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAvtpAafPay *avtpaafpay = GST_AVTP_AAF_PAY (object);
GST_DEBUG_OBJECT (avtpaafpay, "prop_id %u", prop_id);
switch (prop_id) {
case PROP_TSTAMP_MODE:
avtpaafpay->tstamp_mode = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_avtp_aaf_pay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAvtpAafPay *avtpaafpay = GST_AVTP_AAF_PAY (object);
GST_DEBUG_OBJECT (avtpaafpay, "prop_id %u", prop_id);
switch (prop_id) {
case PROP_TSTAMP_MODE:
g_value_set_enum (value, avtpaafpay->tstamp_mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_avtp_aaf_pay_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstAvtpAafPay *avtpaafpay = GST_AVTP_AAF_PAY (element);
GST_DEBUG_OBJECT (avtpaafpay, "transition %d", transition);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:{
GstMemory *mem;
mem = gst_allocator_alloc (NULL, sizeof (struct avtp_stream_pdu), NULL);
if (!mem) {
GST_ERROR_OBJECT (avtpaafpay, "Failed to allocate GstMemory");
return GST_STATE_CHANGE_FAILURE;
}
avtpaafpay->header = gst_memory_ref (mem);
break;
}
case GST_STATE_CHANGE_READY_TO_PAUSED:{
int res;
GstMapInfo info;
struct avtp_stream_pdu *pdu;
GstMemory *mem = avtpaafpay->header;
GstAvtpBasePayload *avtpbasepayload = GST_AVTP_BASE_PAYLOAD (element);
if (!gst_memory_map (mem, &info, GST_MAP_WRITE)) {
GST_ERROR_OBJECT (avtpaafpay, "Failed to map GstMemory");
return GST_STATE_CHANGE_FAILURE;
}
pdu = (struct avtp_stream_pdu *) info.data;
res = avtp_aaf_pdu_init (pdu);
g_assert (res == 0);
res = avtp_aaf_pdu_set (pdu, AVTP_AAF_FIELD_MR, 0);
g_assert (res == 0);
res = avtp_aaf_pdu_set (pdu, AVTP_AAF_FIELD_TV, 1);
g_assert (res == 0);
res = avtp_aaf_pdu_set (pdu, AVTP_AAF_FIELD_TU, 0);
g_assert (res == 0);
res = avtp_aaf_pdu_set (pdu, AVTP_AAF_FIELD_STREAM_ID,
avtpbasepayload->streamid);
g_assert (res == 0);
res = avtp_aaf_pdu_set (pdu, AVTP_AAF_FIELD_SP, avtpaafpay->tstamp_mode);
g_assert (res == 0);
gst_memory_unmap (mem, &info);
break;
}
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE) {
GST_ERROR_OBJECT (avtpaafpay, "Parent failed to handle state transition");
return ret;
}
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
gst_memory_unref (avtpaafpay->header);
break;
default:
break;
}
return ret;
}
static GstFlowReturn
gst_avtp_aaf_pay_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
int res;
GstMemory *mem;
GstMapInfo info;
gsize data_len;
GstClockTime ptime;
struct avtp_stream_pdu *pdu;
GstAvtpAafPay *avtpaafpay = GST_AVTP_AAF_PAY (parent);
GstAvtpBasePayload *avtpbasepayload = GST_AVTP_BASE_PAYLOAD (parent);
ptime = gst_avtp_base_payload_calc_ptime (avtpbasepayload, buffer);
data_len = gst_buffer_get_size (buffer);
mem = gst_memory_copy (avtpaafpay->header, 0, -1);
if (!gst_memory_map (mem, &info, GST_MAP_WRITE)) {
GST_ELEMENT_ERROR (avtpaafpay, RESOURCE, WRITE, ("Failed to map memory"),
(NULL));
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
}
pdu = (struct avtp_stream_pdu *) info.data;
res = avtp_aaf_pdu_set (pdu, AVTP_AAF_FIELD_TIMESTAMP, ptime);
g_assert (res == 0);
res = avtp_aaf_pdu_set (pdu, AVTP_AAF_FIELD_NSR, avtpaafpay->rate);
g_assert (res == 0);
res = avtp_aaf_pdu_set (pdu, AVTP_AAF_FIELD_FORMAT, avtpaafpay->format);
g_assert (res == 0);
res = avtp_aaf_pdu_set (pdu, AVTP_AAF_FIELD_BIT_DEPTH, avtpaafpay->depth);
g_assert (res == 0);
res = avtp_aaf_pdu_set (pdu, AVTP_AAF_FIELD_STREAM_DATA_LEN, data_len);
g_assert (res == 0);
res = avtp_aaf_pdu_set (pdu, AVTP_AAF_FIELD_CHAN_PER_FRAME,
avtpaafpay->channels);
g_assert (res == 0);
res = avtp_aaf_pdu_set (pdu, AVTP_AAF_FIELD_SEQ_NUM,
avtpbasepayload->seqnum++);
g_assert (res == 0);
gst_memory_unmap (mem, &info);
gst_buffer_prepend_memory (buffer, mem);
return gst_pad_push (avtpbasepayload->srcpad, buffer);
}
static int
gst_to_avtp_rate (gint rate)
{
switch (rate) {
case 8000:
return AVTP_AAF_PCM_NSR_8KHZ;
case 16000:
return AVTP_AAF_PCM_NSR_16KHZ;
case 24000:
return AVTP_AAF_PCM_NSR_24KHZ;
case 32000:
return AVTP_AAF_PCM_NSR_32KHZ;
case 44100:
return AVTP_AAF_PCM_NSR_44_1KHZ;
case 48000:
return AVTP_AAF_PCM_NSR_48KHZ;
case 88200:
return AVTP_AAF_PCM_NSR_88_2KHZ;
case 96000:
return AVTP_AAF_PCM_NSR_96KHZ;
case 176400:
return AVTP_AAF_PCM_NSR_176_4KHZ;
case 192000:
return AVTP_AAF_PCM_NSR_192KHZ;
default:
return AVTP_AAF_PCM_NSR_USER;
}
}
static int
gst_to_avtp_format (GstAudioFormat format)
{
switch (format) {
case GST_AUDIO_FORMAT_S16BE:
return AVTP_AAF_FORMAT_INT_16BIT;
case GST_AUDIO_FORMAT_S24BE:
return AVTP_AAF_FORMAT_INT_24BIT;
case GST_AUDIO_FORMAT_S32BE:
return AVTP_AAF_FORMAT_INT_32BIT;
case GST_AUDIO_FORMAT_F32BE:
return AVTP_AAF_FORMAT_FLOAT_32BIT;
default:
return AVTP_AAF_FORMAT_USER;
}
}
static gboolean
gst_avtp_aaf_pay_new_caps (GstAvtpAafPay * avtpaafpay, GstCaps * caps)
{
GstAudioInfo info;
gst_audio_info_init (&info);
if (!gst_audio_info_from_caps (&info, caps)) {
GST_ERROR_OBJECT (avtpaafpay, "Failed to get info from caps");
return FALSE;
}
avtpaafpay->channels = info.channels;
avtpaafpay->depth = info.finfo->depth;
avtpaafpay->rate = gst_to_avtp_rate (info.rate);
avtpaafpay->format = gst_to_avtp_format (info.finfo->format);
GST_DEBUG_OBJECT (avtpaafpay, "channels %d, depth %d, rate %d, format %s",
info.channels, info.finfo->depth, info.rate,
gst_audio_format_to_string (info.finfo->format));
return TRUE;
}
static gboolean
gst_avtp_aaf_pay_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstCaps *caps;
GstAvtpAafPay *avtpaafpay = GST_AVTP_AAF_PAY (parent);
GST_DEBUG_OBJECT (avtpaafpay, "event %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
gst_event_parse_caps (event, &caps);
return gst_avtp_aaf_pay_new_caps (avtpaafpay, caps);
default:
return GST_AVTP_BASE_PAYLOAD_CLASS (parent_class)->sink_event (pad,
parent, event);
}
}
gboolean
gst_avtp_aaf_pay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "avtpaafpay", GST_RANK_NONE,
GST_TYPE_AVTP_AAF_PAY);
}

74
ext/avtp/gstavtpaafpay.h Normal file
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@ -0,0 +1,74 @@
/*
* GStreamer AVTP Plugin
* Copyright (C) 2019 Intel Corporation
*
* 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
*/
#ifndef __GST_AVTP_AAF_PAY_H__
#define __GST_AVTP_AAF_PAY_H__
#include <gst/gst.h>
#include "gstavtpbasepayload.h"
G_BEGIN_DECLS
#define GST_TYPE_AVTP_AAF_PAY (gst_avtp_aaf_pay_get_type())
#define GST_AVTP_AAF_PAY(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AVTP_AAF_PAY,GstAvtpAafPay))
#define GST_AVTP_AAF_PAY_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AVTP_AAF_PAY,GstAvtpAafPayClass))
#define GST_IS_AVTP_AAF_PAY(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AVTP_AAF_PAY))
#define GST_IS_AVTP_AAF_PAY_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AVTP_AAF_PAY))
typedef struct _GstAvtpAafPay GstAvtpAafPay;
typedef struct _GstAvtpAafPayClass GstAvtpAafPayClass;
typedef enum _GstAvtpAafTstampMode GstAvtpAafTstampMode;
enum _GstAvtpAafTstampMode {
GST_AVTP_AAF_TSTAMP_MODE_NORMAL,
GST_AVTP_AAF_TSTAMP_MODE_SPARSE,
};
struct _GstAvtpAafPay
{
GstAvtpBasePayload payload;
GstAvtpAafTstampMode tstamp_mode;
GstMemory *header;
gint channels;
gint depth;
gint rate;
gint format;
};
struct _GstAvtpAafPayClass
{
GstAvtpBasePayloadClass parent_class;
};
GType gst_avtp_aaf_pay_get_type (void);
gboolean gst_avtp_aaf_pay_plugin_init (GstPlugin * plugin);
G_END_DECLS
#endif /* __GST_AVTP_AAF_PAY_H__ */

255
ext/avtp/gstavtpbasepayload.c Normal file
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@ -0,0 +1,255 @@
/*
* GStreamer AVTP Plugin
* Copyright (C) 2019 Intel Corporation
*
* 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
*/
#include "gstavtpbasepayload.h"
GST_DEBUG_CATEGORY_STATIC (avtpbasepayload_debug);
#define GST_CAT_DEFAULT (avtpbasepayload_debug)
#define DEFAULT_STREAMID 0xAABBCCDDEEFF0000
#define DEFAULT_MTT 50000000
#define DEFAULT_TU 1000000
#define DEFAULT_PROCESSING_DEADLINE (20 * GST_MSECOND)
enum
{
PROP_0,
PROP_STREAMID,
PROP_MTT,
PROP_TU,
PROP_PROCESSING_DEADLINE,
};
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-avtp")
);
static void gst_avtp_base_payload_class_init (GstAvtpBasePayloadClass * klass);
static void gst_avtp_base_payload_init (GstAvtpBasePayload * avtpbasepayload,
gpointer g_class);
static void gst_avtp_base_payload_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_avtp_base_payload_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_avtp_base_payload_sink_event (GstPad * pad,
GstObject * parent, GstEvent * event);
GType
gst_avtp_base_payload_get_type (void)
{
static GType avtpbasepayload_type = 0;
if (g_once_init_enter ((gsize *) & avtpbasepayload_type)) {
static const GTypeInfo avtpbasepayload_info = {
sizeof (GstAvtpBasePayloadClass),
NULL,
NULL,
(GClassInitFunc) gst_avtp_base_payload_class_init,
NULL,
NULL,
sizeof (GstAvtpBasePayload),
0,
(GInstanceInitFunc) gst_avtp_base_payload_init,
};
GType _type;
_type = g_type_register_static (GST_TYPE_ELEMENT, "GstAvtpBasePayload",
&avtpbasepayload_info, G_TYPE_FLAG_ABSTRACT);
g_once_init_leave ((gsize *) & avtpbasepayload_type, _type);
}
return avtpbasepayload_type;
}
static void
gst_avtp_base_payload_class_init (GstAvtpBasePayloadClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->set_property = gst_avtp_base_payload_set_property;
object_class->get_property = gst_avtp_base_payload_get_property;
g_object_class_install_property (object_class, PROP_STREAMID,
g_param_spec_uint64 ("streamid", "Stream ID",
"Stream ID associated with the AVTPDU", 0, G_MAXUINT64,
DEFAULT_STREAMID, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
GST_PARAM_MUTABLE_READY));
g_object_class_install_property (object_class, PROP_MTT,
g_param_spec_uint ("mtt", "Maximum Transit Time",
"Maximum Transit Time (MTT) in nanoseconds", 0,
G_MAXUINT, DEFAULT_MTT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_TU,
g_param_spec_uint ("tu", "Timing Uncertainty",
"Timing Uncertainty (TU) in nanoseconds", 0,
G_MAXUINT, DEFAULT_TU, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_PROCESSING_DEADLINE,
g_param_spec_uint64 ("processing-deadline", "Processing deadline",
"Maximum amount of time (in ns) the pipeline can take for processing the buffer",
0, G_MAXUINT64, DEFAULT_PROCESSING_DEADLINE, G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
klass->chain = NULL;
klass->sink_event = GST_DEBUG_FUNCPTR (gst_avtp_base_payload_sink_event);
GST_DEBUG_CATEGORY_INIT (avtpbasepayload_debug, "avtpbasepayload", 0,
"Base class for AVTP payloaders");
}
static void
gst_avtp_base_payload_init (GstAvtpBasePayload * avtpbasepayload,
gpointer g_class)
{
GstPadTemplate *templ;
GstElement *element = GST_ELEMENT (avtpbasepayload);
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GstAvtpBasePayloadClass *avtpbasepayload_class =
GST_AVTP_BASE_PAYLOAD_CLASS (g_class);
g_assert (avtpbasepayload_class->chain != NULL);
avtpbasepayload->srcpad = gst_pad_new_from_static_template (&src_template,
"src");
gst_element_add_pad (element, avtpbasepayload->srcpad);
templ = gst_element_class_get_pad_template (element_class, "sink");
g_assert (templ != NULL);
avtpbasepayload->sinkpad = gst_pad_new_from_template (templ, "sink");
gst_pad_set_chain_function (avtpbasepayload->sinkpad,
avtpbasepayload_class->chain);
gst_pad_set_event_function (avtpbasepayload->sinkpad,
avtpbasepayload_class->sink_event);
gst_element_add_pad (element, avtpbasepayload->sinkpad);
avtpbasepayload->streamid = DEFAULT_STREAMID;
avtpbasepayload->mtt = DEFAULT_MTT;
avtpbasepayload->tu = DEFAULT_TU;
avtpbasepayload->processing_deadline = DEFAULT_PROCESSING_DEADLINE;
avtpbasepayload->latency = GST_CLOCK_TIME_NONE;
avtpbasepayload->seqnum = 0;
gst_segment_init (&avtpbasepayload->segment, GST_FORMAT_UNDEFINED);
}
static void
gst_avtp_base_payload_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAvtpBasePayload *avtpbasepayload = GST_AVTP_BASE_PAYLOAD (object);
GST_DEBUG_OBJECT (avtpbasepayload, "prop_id %u", prop_id);
switch (prop_id) {
case PROP_STREAMID:
avtpbasepayload->streamid = g_value_get_uint64 (value);
break;
case PROP_MTT:
avtpbasepayload->mtt = g_value_get_uint (value);
break;
case PROP_TU:
avtpbasepayload->tu = g_value_get_uint (value);
break;
case PROP_PROCESSING_DEADLINE:
avtpbasepayload->processing_deadline = g_value_get_uint64 (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_avtp_base_payload_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAvtpBasePayload *avtpbasepayload = GST_AVTP_BASE_PAYLOAD (object);
GST_DEBUG_OBJECT (avtpbasepayload, "prop_id %u", prop_id);
switch (prop_id) {
case PROP_STREAMID:
g_value_set_uint64 (value, avtpbasepayload->streamid);
break;
case PROP_MTT:
g_value_set_uint (value, avtpbasepayload->mtt);
break;
case PROP_TU:
g_value_set_uint (value, avtpbasepayload->tu);
break;
case PROP_PROCESSING_DEADLINE:
g_value_set_uint64 (value, avtpbasepayload->processing_deadline);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_avtp_base_payload_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event)
{
GstAvtpBasePayload *avtpbasepayload = GST_AVTP_BASE_PAYLOAD (parent);
GST_DEBUG_OBJECT (avtpbasepayload, "event %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT:
gst_event_copy_segment (event, &avtpbasepayload->segment);
/* Fall through */
default:
return gst_pad_event_default (pad, parent, event);
}
}
GstClockTime
gst_avtp_base_payload_calc_ptime (GstAvtpBasePayload * avtpbasepayload,
GstBuffer * buffer)
{
GstClockTime base_time, running_time;
g_assert (GST_BUFFER_PTS (buffer) != GST_CLOCK_TIME_NONE);
if (G_UNLIKELY (avtpbasepayload->latency == GST_CLOCK_TIME_NONE)) {
GstQuery *query;
query = gst_query_new_latency ();
if (!gst_pad_peer_query (avtpbasepayload->sinkpad, query))
return GST_CLOCK_TIME_NONE;
gst_query_parse_latency (query, NULL, &avtpbasepayload->latency, NULL);
gst_query_unref (query);
GST_DEBUG_OBJECT (avtpbasepayload, "latency %" GST_TIME_FORMAT,
GST_TIME_ARGS (avtpbasepayload->latency));
}
base_time = gst_element_get_base_time (GST_ELEMENT (avtpbasepayload));
running_time = gst_segment_to_running_time (&avtpbasepayload->segment,
avtpbasepayload->segment.format, GST_BUFFER_PTS (buffer));
return base_time + running_time + avtpbasepayload->latency +
avtpbasepayload->processing_deadline + avtpbasepayload->mtt +
avtpbasepayload->tu;
}

80
ext/avtp/gstavtpbasepayload.h Normal file
View file

@ -0,0 +1,80 @@
/*
* GStreamer AVTP Plugin
* Copyright (C) 2019 Intel Corporation
*
* 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
*/
#ifndef __GST_AVTP_BASE_PAYLOAD_H__
#define __GST_AVTP_BASE_PAYLOAD_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_AVTP_BASE_PAYLOAD (gst_avtp_base_payload_get_type())
#define GST_AVTP_BASE_PAYLOAD(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AVTP_BASE_PAYLOAD,GstAvtpBasePayload))
#define GST_AVTP_BASE_PAYLOAD_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AVTP_BASE_PAYLOAD,GstAvtpBasePayloadClass))
#define GST_IS_AVTP_BASE_PAYLOAD(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AVTP_BASE_PAYLOAD))
#define GST_IS_AVTP_BASE_PAYLOAD_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AVTP_BASE_PAYLOAD))
typedef struct _GstAvtpBasePayload GstAvtpBasePayload;
typedef struct _GstAvtpBasePayloadClass GstAvtpBasePayloadClass;
struct _GstAvtpBasePayload
{
GstElement element;
GstPad *sinkpad;
GstPad *srcpad;
guint64 streamid;
guint mtt;
guint tu;
guint64 processing_deadline;
GstClockTime latency;
GstSegment segment;
guint8 seqnum;
gpointer _gst_reserved[GST_PADDING];
};
struct _GstAvtpBasePayloadClass
{
GstElementClass parent_class;
/* Pure virtual function. */
GstPadChainFunction chain;
GstPadEventFunction sink_event;
gpointer _gst_reserved[GST_PADDING];
};
GType gst_avtp_base_payload_get_type (void);
GstClockTime gst_avtp_base_payload_calc_ptime (GstAvtpBasePayload *
avtpbasepayload, GstBuffer * buffer);
G_END_DECLS
#endif /* __GST_AVTP_BASE_PAYLOAD_H__ */

4
ext/avtp/meson.build
View file

@ -1,5 +1,7 @@
avtp_sources = [
'gstavtp.c',
'gstavtpaafpay.c',
'gstavtpbasepayload.c',
]
avtp_dep = dependency('avtp', required: get_option('avtp'))
@ -9,7 +11,7 @@ if avtp_dep.found()
avtp_sources,
c_args : gst_plugins_bad_args,
include_directories : [configinc],
dependencies : libavtp_dep,
dependencies : [gstaudio_dep, avtp_dep],
install : true,
install_dir : plugins_install_dir,
)