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gstreamer/gst/rtp/gstrtph265pay.c
Mathieu Duponchelle f63299ff2f plugins: uddate gst_type_mark_as_plugin_api() calls
2020-06-06 00:42:25 +02:00

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/* GStreamer
* Copyright (C) <2006> Wim Taymans <wim.taymans@gmail.com>
* Copyright (C) <2014> Jurgen Slowack <jurgenslowack@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <stdlib.h>
#include <gst/rtp/gstrtpbuffer.h>
#include <gst/pbutils/pbutils.h>
#include <gst/video/video.h>
/* Included to not duplicate gst_rtp_h265_add_vps_sps_pps () */
#include "gstrtph265depay.h"
#include "gstrtph265pay.h"
#include "gstrtputils.h"
#include "gstbuffermemory.h"
#define AP_TYPE_ID 48
#define FU_TYPE_ID 49
GST_DEBUG_CATEGORY_STATIC (rtph265pay_debug);
#define GST_CAT_DEFAULT (rtph265pay_debug)
#define GST_TYPE_RTP_H265_AGGREGATE_MODE \
(gst_rtp_h265_aggregate_mode_get_type ())
static GType
gst_rtp_h265_aggregate_mode_get_type (void)
{
static GType type = 0;
static const GEnumValue values[] = {
{GST_RTP_H265_AGGREGATE_NONE, "Do not aggregate NAL units", "none"},
{GST_RTP_H265_AGGREGATE_ZERO_LATENCY,
"Aggregate NAL units until a VCL or suffix unit is included",
"zero-latency"},
{GST_RTP_H265_AGGREGATE_MAX,
"Aggregate all NAL units with the same timestamp (adds one frame of"
" latency)", "max"},
{0, NULL, NULL},
};
if (!type) {
type = g_enum_register_static ("GstRtpH265AggregateMode", values);
}
return type;
}
/* references:
*
* Internet Draft RTP Payload Format for High Efficiency Video Coding
*
* draft-ietf-payload-rtp-h265-03.txt
*
* This draft will be replaced with an RFC, so some details may change.
*
*/
static GstStaticPadTemplate gst_rtp_h265_pay_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (
/* only hvc1 and byte-stream formats supported for now */
"video/x-h265, stream-format = (string) hvc1, alignment = (string) au; "
/* "video/x-h265, "
"stream-format = (string) hev1, alignment = (string) au; " */
"video/x-h265, stream-format = (string) byte-stream, "
"alignment = (string) { nal, au }")
);
static GstStaticPadTemplate gst_rtp_h265_pay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, "
"media = (string) \"video\", "
"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
"clock-rate = (int) 90000, " "encoding-name = (string) \"H265\"")
/* optional parameters */
/* "profile-space = (int) [ 0, 3 ], " */
/* "profile-id = (int) [ 0, 31 ], " */
/* "tier-flag = (int) [ 0, 1 ], " */
/* "level-id = (int) [ 0, 255 ], " */
/* "interop-constraints = (string) ANY, " */
/* "profile-compatibility-indicator = (string) ANY, " */
/* "sprop-sub-layer-id = (int) [ 0, 6 ], " */
/* "recv-sub-layer-id = (int) [ 0, 6 ], " */
/* "max-recv-level-id = (int) [ 0, 255 ], " */
/* "tx-mode = (string) {MST , SST}, " */
/* "sprop-vps = (string) ANY, " */
/* "sprop-sps = (string) ANY, " */
/* "sprop-pps = (string) ANY, " */
/* "sprop-sei = (string) ANY, " */
/* "max-lsr = (int) ANY, " *//* MUST be in the range of MaxLumaSR to 16 * MaxLumaSR, inclusive */
/* "max-lps = (int) ANY, " *//* MUST be in the range of MaxLumaPS to 16 * MaxLumaPS, inclusive */
/* "max-cpb = (int) ANY, " *//* MUST be in the range of MaxCPB to 16 * MaxCPB, inclusive */
/* "max-dpb = (int) [1, 16], " */
/* "max-br = (int) ANY, " *//* MUST be in the range of MaxBR to 16 * MaxBR, inclusive, for the highest level */
/* "max-tr = (int) ANY, " *//* MUST be in the range of MaxTileRows to 16 * MaxTileRows, inclusive, for the highest level */
/* "max-tc = (int) ANY, " *//* MUST be in the range of MaxTileCols to 16 * MaxTileCols, inclusive, for the highest level */
/* "max-fps = (int) ANY, " */
/* "sprop-max-don-diff = (int) [0, 32767], " */
/* "sprop-depack-buf-nalus = (int) [0, 32767], " */
/* "sprop-depack-buf-nalus = (int) [0, 4294967295], " */
/* "depack-buf-cap = (int) [1, 4294967295], " */
/* "sprop-segmentation-id = (int) [0, 3], " */
/* "sprop-spatial-segmentation-idc = (string) ANY, " */
/* "dec-parallel-cap = (string) ANY, " */
);
#define DEFAULT_CONFIG_INTERVAL 0
#define DEFAULT_AGGREGATE_MODE GST_RTP_H265_AGGREGATE_ZERO_LATENCY
enum
{
PROP_0,
PROP_CONFIG_INTERVAL,
PROP_AGGREGATE_MODE,
};
static void gst_rtp_h265_pay_finalize (GObject * object);
static void gst_rtp_h265_pay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_rtp_h265_pay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstCaps *gst_rtp_h265_pay_getcaps (GstRTPBasePayload * payload,
GstPad * pad, GstCaps * filter);
static gboolean gst_rtp_h265_pay_setcaps (GstRTPBasePayload * basepayload,
GstCaps * caps);
static GstFlowReturn gst_rtp_h265_pay_handle_buffer (GstRTPBasePayload * pad,
GstBuffer * buffer);
static gboolean gst_rtp_h265_pay_sink_event (GstRTPBasePayload * payload,
GstEvent * event);
static GstStateChangeReturn gst_rtp_h265_pay_change_state (GstElement *
element, GstStateChange transition);
static gboolean gst_rtp_h265_pay_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static void gst_rtp_h265_pay_reset_bundle (GstRtpH265Pay * rtph265pay);
#define gst_rtp_h265_pay_parent_class parent_class
G_DEFINE_TYPE (GstRtpH265Pay, gst_rtp_h265_pay, GST_TYPE_RTP_BASE_PAYLOAD);
static void
gst_rtp_h265_pay_class_init (GstRtpH265PayClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstRTPBasePayloadClass *gstrtpbasepayload_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstrtpbasepayload_class = (GstRTPBasePayloadClass *) klass;
gobject_class->set_property = gst_rtp_h265_pay_set_property;
gobject_class->get_property = gst_rtp_h265_pay_get_property;
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_CONFIG_INTERVAL,
g_param_spec_int ("config-interval",
"VPS SPS PPS Send Interval",
"Send VPS, SPS and PPS Insertion Interval in seconds (sprop parameter sets "
"will be multiplexed in the data stream when detected.) "
"(0 = disabled, -1 = send with every IDR frame)",
-1, 3600, DEFAULT_CONFIG_INTERVAL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_AGGREGATE_MODE,
g_param_spec_enum ("aggregate-mode",
"Attempt to use aggregate packets",
"Bundle suitable SPS/PPS NAL units into aggregate packets.",
GST_TYPE_RTP_H265_AGGREGATE_MODE,
DEFAULT_AGGREGATE_MODE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
gobject_class->finalize = gst_rtp_h265_pay_finalize;
gst_element_class_add_static_pad_template (gstelement_class,
&gst_rtp_h265_pay_src_template);
gst_element_class_add_static_pad_template (gstelement_class,
&gst_rtp_h265_pay_sink_template);
gst_element_class_set_static_metadata (gstelement_class, "RTP H265 payloader",
"Codec/Payloader/Network/RTP",
"Payload-encode H265 video into RTP packets (RFC 7798)",
"Jurgen Slowack <jurgenslowack@gmail.com>");
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_rtp_h265_pay_change_state);
gstrtpbasepayload_class->get_caps = gst_rtp_h265_pay_getcaps;
gstrtpbasepayload_class->set_caps = gst_rtp_h265_pay_setcaps;
gstrtpbasepayload_class->handle_buffer = gst_rtp_h265_pay_handle_buffer;
gstrtpbasepayload_class->sink_event = gst_rtp_h265_pay_sink_event;
GST_DEBUG_CATEGORY_INIT (rtph265pay_debug, "rtph265pay", 0,
"H265 RTP Payloader");
gst_type_mark_as_plugin_api (GST_TYPE_RTP_H265_AGGREGATE_MODE, 0);
}
static void
gst_rtp_h265_pay_init (GstRtpH265Pay * rtph265pay)
{
rtph265pay->queue = g_array_new (FALSE, FALSE, sizeof (guint));
rtph265pay->sps = g_ptr_array_new_with_free_func (
(GDestroyNotify) gst_buffer_unref);
rtph265pay->pps = g_ptr_array_new_with_free_func (
(GDestroyNotify) gst_buffer_unref);
rtph265pay->vps = g_ptr_array_new_with_free_func (
(GDestroyNotify) gst_buffer_unref);
rtph265pay->last_vps_sps_pps = -1;
rtph265pay->vps_sps_pps_interval = DEFAULT_CONFIG_INTERVAL;
rtph265pay->aggregate_mode = DEFAULT_AGGREGATE_MODE;
rtph265pay->adapter = gst_adapter_new ();
gst_pad_set_query_function (GST_RTP_BASE_PAYLOAD_SRCPAD (rtph265pay),
gst_rtp_h265_pay_src_query);
}
static void
gst_rtp_h265_pay_clear_vps_sps_pps (GstRtpH265Pay * rtph265pay)
{
g_ptr_array_set_size (rtph265pay->vps, 0);
g_ptr_array_set_size (rtph265pay->sps, 0);
g_ptr_array_set_size (rtph265pay->pps, 0);
}
static void
gst_rtp_h265_pay_finalize (GObject * object)
{
GstRtpH265Pay *rtph265pay;
rtph265pay = GST_RTP_H265_PAY (object);
g_array_free (rtph265pay->queue, TRUE);
g_ptr_array_free (rtph265pay->sps, TRUE);
g_ptr_array_free (rtph265pay->pps, TRUE);
g_ptr_array_free (rtph265pay->vps, TRUE);
g_object_unref (rtph265pay->adapter);
gst_rtp_h265_pay_reset_bundle (rtph265pay);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_rtp_h265_pay_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstRtpH265Pay *rtph265pay = GST_RTP_H265_PAY (parent);
if (GST_QUERY_TYPE (query) == GST_QUERY_LATENCY) {
gboolean retval;
gboolean live;
GstClockTime min_latency, max_latency;
retval = gst_pad_query_default (pad, parent, query);
if (!retval)
return retval;
if (rtph265pay->stream_format == GST_H265_STREAM_FORMAT_UNKNOWN ||
rtph265pay->alignment == GST_H265_ALIGNMENT_UNKNOWN)
return FALSE;
gst_query_parse_latency (query, &live, &min_latency, &max_latency);
if (rtph265pay->aggregate_mode == GST_RTP_H265_AGGREGATE_MAX &&
rtph265pay->alignment != GST_H265_ALIGNMENT_AU && rtph265pay->fps_num) {
GstClockTime one_frame = gst_util_uint64_scale_int (GST_SECOND,
rtph265pay->fps_denum, rtph265pay->fps_num);
min_latency += one_frame;
max_latency += one_frame;
gst_query_set_latency (query, live, min_latency, max_latency);
}
return TRUE;
}
return gst_pad_query_default (pad, parent, query);
}
static const gchar all_levels[][4] = {
"1",
"2",
"2.1",
"3",
"3.1",
"4",
"4.1",
"5",
"5.1",
"5.2",
"6",
"6.1",
"6.2"
};
static gboolean
parse_field (GstStructure * s, const gchar * field, gulong min, gulong max,
guint8 * result)
{
const gchar *str;
g_assert (result != NULL);
str = gst_structure_get_string (s, field);
if (str != NULL && *str != '\0') {
gulong value;
gchar *end;
value = strtoul (str, &end, 10);
if (*end == '\0' && value >= min && value <= max) {
*result = (guint8) value;
} else {
return FALSE;
}
} else {
return FALSE;
}
return TRUE;
}
static GstCaps *
gst_rtp_h265_pay_getcaps (GstRTPBasePayload * payload, GstPad * pad,
GstCaps * filter)
{
GstCaps *template_caps;
GstCaps *allowed_caps;
GstCaps *caps;
GstCaps *icaps;
guint i;
allowed_caps =
gst_pad_peer_query_caps (GST_RTP_BASE_PAYLOAD_SRCPAD (payload), NULL);
if (allowed_caps == NULL)
return NULL;
template_caps =
gst_static_pad_template_get_caps (&gst_rtp_h265_pay_sink_template);
if (gst_caps_is_any (allowed_caps)) {
caps = gst_caps_ref (template_caps);
goto done;
}
if (gst_caps_is_empty (allowed_caps)) {
caps = gst_caps_ref (allowed_caps);
goto done;
}
caps = gst_caps_new_empty ();
for (i = 0; i < gst_caps_get_size (allowed_caps); i++) {
GstStructure *s = gst_caps_get_structure (allowed_caps, i);
GstStructure *new_s = gst_structure_new_empty ("video/x-h265");
guint8 ptl[12] = { 0, };
guint8 value;
if (parse_field (s, "profile-id", 0, 31, &value)) {
const gchar *profile;
ptl[0] = value;
profile = gst_codec_utils_h265_get_profile (ptl, sizeof (ptl));
if (profile != NULL) {
GST_DEBUG_OBJECT (payload, "profile %s", profile);
gst_structure_set (new_s, "profile", G_TYPE_STRING, profile, NULL);
} else {
GST_WARNING_OBJECT (payload, "invalid profile-id %d in caps", value);
}
} else {
GST_DEBUG_OBJECT (payload, "no valid profile-id in caps");
}
if (parse_field (s, "tier-flag", 0, 1, &value)) {
const gchar *tier;
ptl[0] |= value << 5;
tier = gst_codec_utils_h265_get_tier (ptl, sizeof (ptl));
GST_DEBUG_OBJECT (payload, "tier %s", tier);
gst_structure_set (new_s, "tier", G_TYPE_STRING, tier, NULL);
} else {
GST_DEBUG_OBJECT (payload, "no valid tier-flag in caps");
}
if (parse_field (s, "level-id", 0, 255, &value)) {
const gchar *level;
ptl[11] = value;
level = gst_codec_utils_h265_get_level (ptl, sizeof (ptl));
if (level != NULL) {
GST_DEBUG_OBJECT (payload, "level %s", level);
if (strcmp (level, "1") == 0) {
gst_structure_set (new_s, "level", G_TYPE_STRING, level, NULL);
} else {
GValue levels = { 0, };
GValue val = { 0, };
int j;
g_value_init (&levels, GST_TYPE_LIST);
g_value_init (&val, G_TYPE_STRING);
for (j = 0; j < G_N_ELEMENTS (all_levels); j++) {
g_value_set_static_string (&val, all_levels[j]);
gst_value_list_prepend_value (&levels, &val);
if (!strcmp (level, all_levels[j]))
break;
}
gst_structure_take_value (new_s, "level", &levels);
}
} else {
GST_WARNING_OBJECT (payload, "invalid level-id %d in caps", value);
}
} else {
GST_DEBUG_OBJECT (payload, "no valid level-id in caps");
}
caps = gst_caps_merge_structure (caps, new_s);
}
icaps = gst_caps_intersect (caps, template_caps);
gst_caps_unref (caps);
caps = icaps;
done:
if (filter) {
GstCaps *tmp;
GST_DEBUG_OBJECT (payload, "Intersect %" GST_PTR_FORMAT " and filter %"
GST_PTR_FORMAT, caps, filter);
tmp = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (caps);
caps = tmp;
}
gst_caps_unref (template_caps);
gst_caps_unref (allowed_caps);
GST_LOG_OBJECT (payload, "returning caps %" GST_PTR_FORMAT, caps);
return caps;
}
/* take the currently configured VPS, SPS and PPS lists and set them on the
* caps */
static gboolean
gst_rtp_h265_pay_set_vps_sps_pps (GstRTPBasePayload * basepayload)
{
GstRtpH265Pay *payloader = GST_RTP_H265_PAY (basepayload);
gchar *set;
GString *vps;
GString *sps;
GString *pps;
guint count;
gboolean res;
GstMapInfo map;
guint i;
vps = g_string_new ("");
sps = g_string_new ("");
pps = g_string_new ("");
count = 0;
for (i = 0; i < payloader->vps->len; i++) {
GstBuffer *vps_buf =
GST_BUFFER_CAST (g_ptr_array_index (payloader->vps, i));
gst_buffer_map (vps_buf, &map, GST_MAP_READ);
set = g_base64_encode (map.data, map.size);
gst_buffer_unmap (vps_buf, &map);
g_string_append_printf (vps, "%s%s", i ? "," : "", set);
g_free (set);
count++;
}
for (i = 0; i < payloader->sps->len; i++) {
GstBuffer *sps_buf =
GST_BUFFER_CAST (g_ptr_array_index (payloader->sps, i));
gst_buffer_map (sps_buf, &map, GST_MAP_READ);
set = g_base64_encode (map.data, map.size);
gst_buffer_unmap (sps_buf, &map);
g_string_append_printf (sps, "%s%s", i ? "," : "", set);
g_free (set);
count++;
}
for (i = 0; i < payloader->pps->len; i++) {
GstBuffer *pps_buf =
GST_BUFFER_CAST (g_ptr_array_index (payloader->pps, i));
gst_buffer_map (pps_buf, &map, GST_MAP_READ);
set = g_base64_encode (map.data, map.size);
gst_buffer_unmap (pps_buf, &map);
g_string_append_printf (pps, "%s%s", i ? "," : "", set);
g_free (set);
count++;
}
if (G_LIKELY (count)) {
/* combine into output caps */
res = gst_rtp_base_payload_set_outcaps (basepayload,
"sprop-vps", G_TYPE_STRING, vps->str,
"sprop-sps", G_TYPE_STRING, sps->str,
"sprop-pps", G_TYPE_STRING, pps->str, NULL);
} else {
res = gst_rtp_base_payload_set_outcaps (basepayload, NULL);
}
g_string_free (vps, TRUE);
g_string_free (sps, TRUE);
g_string_free (pps, TRUE);
return res;
}
static gboolean
gst_rtp_h265_pay_setcaps (GstRTPBasePayload * basepayload, GstCaps * caps)
{
GstRtpH265Pay *rtph265pay;
GstStructure *str;
const GValue *value;
GstMapInfo map;
guint8 *data;
gsize size;
GstBuffer *buffer;
const gchar *alignment, *stream_format;
guint8 num_arrays;
rtph265pay = GST_RTP_H265_PAY (basepayload);
str = gst_caps_get_structure (caps, 0);
/* we can only set the output caps when we found the sprops and profile
* NALs */
gst_rtp_base_payload_set_options (basepayload, "video", TRUE, "H265", 90000);
rtph265pay->alignment = GST_H265_ALIGNMENT_UNKNOWN;
alignment = gst_structure_get_string (str, "alignment");
if (alignment) {
if (g_str_equal (alignment, "au"))
rtph265pay->alignment = GST_H265_ALIGNMENT_AU;
if (g_str_equal (alignment, "nal"))
rtph265pay->alignment = GST_H265_ALIGNMENT_NAL;
}
rtph265pay->stream_format = GST_H265_STREAM_FORMAT_UNKNOWN;
stream_format = gst_structure_get_string (str, "stream-format");
if (stream_format) {
if (g_str_equal (stream_format, "hvc1"))
rtph265pay->stream_format = GST_H265_STREAM_FORMAT_HVC1;
if (g_str_equal (stream_format, "hev1"))
rtph265pay->stream_format = GST_H265_STREAM_FORMAT_HEV1;
if (g_str_equal (stream_format, "byte-stream"))
rtph265pay->stream_format = GST_H265_STREAM_FORMAT_BYTESTREAM;
}
if (!gst_structure_get_fraction (str, "framerate", &rtph265pay->fps_num,
&rtph265pay->fps_denum))
rtph265pay->fps_num = rtph265pay->fps_denum = 0;
/* packetized HEVC video has a codec_data */
if ((value = gst_structure_get_value (str, "codec_data"))) {
guint num_vps, num_sps, num_pps;
gint i, j, nal_size;
GST_DEBUG_OBJECT (rtph265pay, "have packetized h265");
buffer = gst_value_get_buffer (value);
gst_buffer_map (buffer, &map, GST_MAP_READ);
data = map.data;
size = map.size;
/* parse the hevcC data */
if (size < 23)
goto hevcc_too_small;
/* HEVCDecoderConfigurationVersion (must be 1) */
if (data[0] != 1)
goto wrong_version;
/* profile_space | tier_flag | profile_idc */
GST_DEBUG_OBJECT (rtph265pay, "profile %06x", data[1]);
/* profile_compatibility_flags */
for (i = 2; i < 6; i++) {
for (j = 7; j >= 0; j--) {
GST_DEBUG_OBJECT (rtph265pay, "profile_compatibility_flag %06x",
(data[i] >> j) & 1);
}
}
GST_DEBUG_OBJECT (rtph265pay, "progressive_source_flag %06x",
(data[6] >> 7) & 1);
GST_DEBUG_OBJECT (rtph265pay, "interlaced_source_flag %06x",
(data[6] >> 6) & 1);
GST_DEBUG_OBJECT (rtph265pay, "non_packed_constraint_flag %06x",
(data[6] >> 5) & 1);
GST_DEBUG_OBJECT (rtph265pay, "frame_only_constraint_flag %06x",
(data[6] >> 4) & 1);
GST_DEBUG_OBJECT (rtph265pay, "level_idc %06x", data[12]);
GST_DEBUG_OBJECT (rtph265pay, "min_spatial_segmentation_idc %06x",
((data[13] ^ 0xf0) << 8) + data[14]);
GST_DEBUG_OBJECT (rtph265pay, "parrallelismType %06x (ignored by paloader)",
data[15]);
GST_DEBUG_OBJECT (rtph265pay, "sps_chroma_format_idc %06x",
data[16] ^ 0xfc);
GST_DEBUG_OBJECT (rtph265pay, "bit_depth_luma_minus8 %06x",
data[17] ^ 0xf8);
GST_DEBUG_OBJECT (rtph265pay, "bit_depth_chroma_minus8 %06x",
data[18] ^ 0xf8);
GST_DEBUG_OBJECT (rtph265pay, "avgFrameRate %06x", data[19]);
GST_DEBUG_OBJECT (rtph265pay, "avgFrameRate %06x", data[20]);
/* constFrameRate(2 bits): 0, stream may or may not be of constant framerate
* numTemporalLayers (3 bits): number of temporal layers, value from SPS
* TemporalIdNested (1 bit): sps_temporal_id_nesting_flag from SPS
* lengthSizeMinusOne (2 bits): plus 1 indicates the length of the NALUnitLength */
GST_DEBUG_OBJECT (rtph265pay, "constFrameRate %06x",
(data[21] >> 6) & 0x03);
GST_DEBUG_OBJECT (rtph265pay, "numTemporalLayers %06x",
(data[21] >> 3) & 0x07);
GST_DEBUG_OBJECT (rtph265pay, "temporal_id_nesting_flag %06x",
(data[21] >> 2) & 0x01);
rtph265pay->nal_length_size = (data[21] & 0x3) + 1;
GST_DEBUG_OBJECT (rtph265pay, "nal length %u", rtph265pay->nal_length_size);
num_arrays = GST_READ_UINT8 (data + 22);
data += 23;
size -= 23;
if (num_arrays > 0) {
if ((data[0] & 0x3f) == 0x20) { /* VPS */
data++;
num_vps = data[0] << 8 | data[1];
data += 2;
size -= 2;
for (i = 0; i < num_vps; i++) {
GstBuffer *vps_buf;
if (size < 2)
goto hevcc_error;
nal_size = (data[0] << 8) | data[1];
data += 2;
size -= 2;
GST_LOG_OBJECT (rtph265pay, "VPS %d size %d", i, nal_size);
if (size < nal_size)
goto hevcc_error;
/* make a buffer out of it and add to VPS list */
vps_buf = gst_buffer_new_and_alloc (nal_size);
gst_buffer_fill (vps_buf, 0, data, nal_size);
gst_rtp_h265_add_vps_sps_pps (GST_ELEMENT (rtph265pay),
rtph265pay->vps, rtph265pay->sps, rtph265pay->pps, vps_buf);
data += nal_size;
size -= nal_size;
}
}
--num_arrays;
}
if (num_arrays > 0) {
if ((data[0] & 0x3f) == 0x21) { /* SPS */
data++;
num_sps = data[0] << 8 | data[1];
data += 2;
size -= 2;
for (i = 0; i < num_sps; i++) {
GstBuffer *sps_buf;
if (size < 2)
goto hevcc_error;
nal_size = (data[0] << 8) | data[1];
data += 2;
size -= 2;
GST_LOG_OBJECT (rtph265pay, "SPS %d size %d", i, nal_size);
if (size < nal_size)
goto hevcc_error;
/* make a buffer out of it and add to SPS list */
sps_buf = gst_buffer_new_and_alloc (nal_size);
gst_buffer_fill (sps_buf, 0, data, nal_size);
gst_rtp_h265_add_vps_sps_pps (GST_ELEMENT (rtph265pay),
rtph265pay->vps, rtph265pay->sps, rtph265pay->pps, sps_buf);
data += nal_size;
size -= nal_size;
}
}
--num_arrays;
}
if (num_arrays > 0) {
if ((data[0] & 0x3f) == 0x22) { /* PPS */
data++;
num_pps = data[0] << 8 | data[1];
data += 2;
size -= 2;
for (i = 0; i < num_pps; i++) {
GstBuffer *pps_buf;
if (size < 2)
goto hevcc_error;
nal_size = (data[0] << 8) | data[1];
data += 2;
size -= 2;
GST_LOG_OBJECT (rtph265pay, "PPS %d size %d", i, nal_size);
if (size < nal_size)
goto hevcc_error;
/* make a buffer out of it and add to PPS list */
pps_buf = gst_buffer_new_and_alloc (nal_size);
gst_buffer_fill (pps_buf, 0, data, nal_size);
gst_rtp_h265_add_vps_sps_pps (GST_ELEMENT (rtph265pay),
rtph265pay->vps, rtph265pay->sps, rtph265pay->pps, pps_buf);
data += nal_size;
size -= nal_size;
}
}
--num_arrays;
}
/* and update the caps with the collected data */
if (!gst_rtp_h265_pay_set_vps_sps_pps (basepayload))
goto set_vps_sps_pps_failed;
GST_DEBUG_OBJECT (rtph265pay, "Caps have been set");
gst_buffer_unmap (buffer, &map);
} else {
GST_DEBUG_OBJECT (rtph265pay, "have bytestream h265");
}
return TRUE;
hevcc_too_small:
{
GST_ERROR_OBJECT (rtph265pay, "hevcC size %" G_GSIZE_FORMAT " < 7", size);
goto error;
}
wrong_version:
{
GST_ERROR_OBJECT (rtph265pay, "wrong hevcC version");
goto error;
}
hevcc_error:
{
GST_ERROR_OBJECT (rtph265pay, "hevcC too small ");
goto error;
}
set_vps_sps_pps_failed:
{
GST_ERROR_OBJECT (rtph265pay, "failed to set vps/sps/pps");
goto error;
}
error:
{
gst_buffer_unmap (buffer, &map);
return FALSE;
}
}
static guint
next_start_code (const guint8 * data, guint size)
{
/* Boyer-Moore string matching algorithm, in a degenerative
* sense because our search 'alphabet' is binary - 0 & 1 only.
* This allow us to simplify the general BM algorithm to a very
* simple form. */
/* assume 1 is in the 3rd byte */
guint offset = 2;
while (offset < size) {
if (1 == data[offset]) {
unsigned int shift = offset;
if (0 == data[--shift]) {
if (0 == data[--shift]) {
return shift;
}
}
/* The jump is always 3 because of the 1 previously matched.
* All the 0's must be after this '1' matched at offset */
offset += 3;
} else if (0 == data[offset]) {
/* maybe next byte is 1? */
offset++;
} else {
/* can jump 3 bytes forward */
offset += 3;
}
/* at each iteration, we rescan in a backward manner until
* we match 0.0.1 in reverse order. Since our search string
* has only 2 'alpabets' (i.e. 0 & 1), we know that any
* mismatch will force us to shift a fixed number of steps */
}
GST_DEBUG ("Cannot find next NAL start code. returning %u", size);
return size;
}
static gboolean
gst_rtp_h265_pay_decode_nal (GstRtpH265Pay * payloader,
const guint8 * data, guint size, GstClockTime dts, GstClockTime pts)
{
guint8 type;
gboolean updated;
/* default is no update */
updated = FALSE;
GST_DEBUG_OBJECT (payloader, "NAL payload size %u", size);
type = (data[0] >> 1) & 0x3f;
/* We record the timestamp of the last SPS/PPS so
* that we can insert them at regular intervals and when needed. */
if (GST_H265_NAL_VPS == type || GST_H265_NAL_SPS == type
|| GST_H265_NAL_PPS == type) {
GstBuffer *nal;
/* trailing 0x0 are not part of the VPS/SPS/PPS */
while (size > 0 && data[size - 1] == 0x0)
size--;
/* encode the entire NAL in base64 */
GST_DEBUG_OBJECT (payloader, "found %s (type 0x%x), size %u",
type == GST_H265_NAL_VPS ? "VPS" : type == GST_H265_NAL_SPS ?
"SPS" : "PPS", type, size);
nal = gst_buffer_new_allocate (NULL, size, NULL);
gst_buffer_fill (nal, 0, data, size);
updated = gst_rtp_h265_add_vps_sps_pps (GST_ELEMENT (payloader),
payloader->vps, payloader->sps, payloader->pps, nal);
/* remember when we last saw VPS */
if (pts != -1)
payloader->last_vps_sps_pps =
gst_segment_to_running_time (&GST_RTP_BASE_PAYLOAD_CAST
(payloader)->segment, GST_FORMAT_TIME, pts);
} else {
GST_DEBUG_OBJECT (payloader, "NALU type 0x%x, size %u", type, size);
}
return updated;
}
static GstFlowReturn gst_rtp_h265_pay_payload_nal (GstRTPBasePayload *
basepayload, GPtrArray * paybufs, GstClockTime dts, GstClockTime pts);
static GstFlowReturn gst_rtp_h265_pay_payload_nal_single (GstRTPBasePayload *
basepayload, GstBuffer * paybuf, GstClockTime dts, GstClockTime pts,
gboolean marker);
static GstFlowReturn gst_rtp_h265_pay_payload_nal_fragment (GstRTPBasePayload *
basepayload, GstBuffer * paybuf, GstClockTime dts, GstClockTime pts,
gboolean marker, guint mtu, guint8 nal_type, const guint8 * nal_header,
int size);
static GstFlowReturn gst_rtp_h265_pay_payload_nal_bundle (GstRTPBasePayload *
basepayload, GstBuffer * paybuf, GstClockTime dts, GstClockTime pts,
gboolean marker, guint8 nal_type, const guint8 * nal_header, int size);
static GstFlowReturn
gst_rtp_h265_pay_send_vps_sps_pps (GstRTPBasePayload * basepayload,
GstRtpH265Pay * rtph265pay, GstClockTime dts, GstClockTime pts)
{
GstFlowReturn ret = GST_FLOW_OK;
gboolean sent_all_vps_sps_pps = TRUE;
guint i;
GPtrArray *bufs;
bufs = g_ptr_array_new ();
for (i = 0; i < rtph265pay->vps->len; i++) {
GstBuffer *vps_buf =
GST_BUFFER_CAST (g_ptr_array_index (rtph265pay->vps, i));
GST_DEBUG_OBJECT (rtph265pay, "inserting VPS in the stream");
g_ptr_array_add (bufs, gst_buffer_ref (vps_buf));
}
for (i = 0; i < rtph265pay->sps->len; i++) {
GstBuffer *sps_buf =
GST_BUFFER_CAST (g_ptr_array_index (rtph265pay->sps, i));
GST_DEBUG_OBJECT (rtph265pay, "inserting SPS in the stream");
g_ptr_array_add (bufs, gst_buffer_ref (sps_buf));
}
for (i = 0; i < rtph265pay->pps->len; i++) {
GstBuffer *pps_buf =
GST_BUFFER_CAST (g_ptr_array_index (rtph265pay->pps, i));
GST_DEBUG_OBJECT (rtph265pay, "inserting PPS in the stream");
g_ptr_array_add (bufs, gst_buffer_ref (pps_buf));
}
ret = gst_rtp_h265_pay_payload_nal (basepayload, bufs, dts, pts);
if (ret != GST_FLOW_OK) {
/* not critical but warn */
GST_WARNING_OBJECT (basepayload, "failed pushing VPS/SPS/PPS");
sent_all_vps_sps_pps = FALSE;
}
if (pts != -1 && sent_all_vps_sps_pps)
rtph265pay->last_vps_sps_pps =
gst_segment_to_running_time (&basepayload->segment, GST_FORMAT_TIME,
pts);
return ret;
}
static void
gst_rtp_h265_pay_reset_bundle (GstRtpH265Pay * rtph265pay)
{
g_clear_pointer (&rtph265pay->bundle, gst_buffer_list_unref);
rtph265pay->bundle_size = 0;
rtph265pay->bundle_contains_vcl_or_suffix = FALSE;
}
static GstFlowReturn
gst_rtp_h265_pay_payload_nal (GstRTPBasePayload * basepayload,
GPtrArray * paybufs, GstClockTime dts, GstClockTime pts)
{
GstRtpH265Pay *rtph265pay;
guint mtu;
GstFlowReturn ret;
gint i;
gboolean sent_ps;
rtph265pay = GST_RTP_H265_PAY (basepayload);
mtu = GST_RTP_BASE_PAYLOAD_MTU (rtph265pay);
/* should set src caps before pushing stuff,
* and if we did not see enough VPS/SPS/PPS, that may not be the case */
if (G_UNLIKELY (!gst_pad_has_current_caps (GST_RTP_BASE_PAYLOAD_SRCPAD
(basepayload))))
gst_rtp_h265_pay_set_vps_sps_pps (basepayload);
ret = GST_FLOW_OK;
sent_ps = FALSE;
for (i = 0; i < paybufs->len; i++) {
guint8 nal_header[2];
guint8 nal_type;
GstBuffer *paybuf;
gboolean send_ps;
guint size;
gboolean marker;
paybuf = g_ptr_array_index (paybufs, i);
if (ret != GST_FLOW_OK) {
/* unref buffers that will not be payloaded after a flow error */
gst_buffer_unref (paybuf);
continue;
}
marker = GST_BUFFER_FLAG_IS_SET (paybuf, GST_BUFFER_FLAG_MARKER);
size = gst_buffer_get_size (paybuf);
gst_buffer_extract (paybuf, 0, nal_header, 2);
nal_type = (nal_header[0] >> 1) & 0x3f;
GST_DEBUG_OBJECT (rtph265pay, "payloading NAL Unit: datasize=%u type=%d"
" pts=%" GST_TIME_FORMAT, size, nal_type, GST_TIME_ARGS (pts));
send_ps = FALSE;
/* check if we need to emit an VPS/SPS/PPS now */
if ((nal_type == GST_H265_NAL_SLICE_TRAIL_N)
|| (nal_type == GST_H265_NAL_SLICE_TRAIL_R)
|| (nal_type == GST_H265_NAL_SLICE_TSA_N)
|| (nal_type == GST_H265_NAL_SLICE_TSA_R)
|| (nal_type == GST_H265_NAL_SLICE_STSA_N)
|| (nal_type == GST_H265_NAL_SLICE_STSA_R)
|| (nal_type == GST_H265_NAL_SLICE_RASL_N)
|| (nal_type == GST_H265_NAL_SLICE_RASL_R)
|| (nal_type == GST_H265_NAL_SLICE_BLA_W_LP)
|| (nal_type == GST_H265_NAL_SLICE_BLA_W_RADL)
|| (nal_type == GST_H265_NAL_SLICE_BLA_N_LP)
|| (nal_type == GST_H265_NAL_SLICE_IDR_W_RADL)
|| (nal_type == GST_H265_NAL_SLICE_IDR_N_LP)
|| (nal_type == GST_H265_NAL_SLICE_CRA_NUT)) {
if (rtph265pay->vps_sps_pps_interval > 0) {
if (rtph265pay->last_vps_sps_pps != -1) {
guint64 diff;
GstClockTime running_time =
gst_segment_to_running_time (&basepayload->segment,
GST_FORMAT_TIME, pts);
GST_LOG_OBJECT (rtph265pay,
"now %" GST_TIME_FORMAT ", last VPS/SPS/PPS %" GST_TIME_FORMAT,
GST_TIME_ARGS (running_time),
GST_TIME_ARGS (rtph265pay->last_vps_sps_pps));
/* calculate diff between last SPS/PPS in milliseconds */
if (running_time > rtph265pay->last_vps_sps_pps)
diff = running_time - rtph265pay->last_vps_sps_pps;
else
diff = 0;
GST_DEBUG_OBJECT (rtph265pay,
"interval since last VPS/SPS/PPS %" GST_TIME_FORMAT,
GST_TIME_ARGS (diff));
/* bigger than interval, queue SPS/PPS */
if (GST_TIME_AS_SECONDS (diff) >= rtph265pay->vps_sps_pps_interval) {
GST_DEBUG_OBJECT (rtph265pay, "time to send VPS/SPS/PPS");
send_ps = TRUE;
}
} else {
/* no known previous SPS/PPS time, send now */
GST_DEBUG_OBJECT (rtph265pay,
"no previous VPS/SPS/PPS time, send now");
send_ps = TRUE;
}
} else if (rtph265pay->vps_sps_pps_interval == -1
&& (nal_type == GST_H265_NAL_SLICE_IDR_W_RADL
|| nal_type == GST_H265_NAL_SLICE_IDR_N_LP)) {
/* send VPS/SPS/PPS before every IDR frame */
send_ps = TRUE;
}
}
if (!sent_ps && (send_ps || rtph265pay->send_vps_sps_pps)) {
/* we need to send SPS/PPS now first. FIXME, don't use the pts for
* checking when we need to send SPS/PPS but convert to running_time
* first */
rtph265pay->send_vps_sps_pps = FALSE;
sent_ps = TRUE;
GST_DEBUG_OBJECT (rtph265pay, "sending VPS/SPS/PPS before current frame");
ret =
gst_rtp_h265_pay_send_vps_sps_pps (basepayload, rtph265pay, dts, pts);
if (ret != GST_FLOW_OK) {
gst_buffer_unref (paybuf);
continue;
}
}
if (rtph265pay->aggregate_mode != GST_RTP_H265_AGGREGATE_NONE)
ret = gst_rtp_h265_pay_payload_nal_bundle (basepayload, paybuf, dts, pts,
marker, nal_type, nal_header, size);
else
ret = gst_rtp_h265_pay_payload_nal_fragment (basepayload, paybuf, dts,
pts, marker, mtu, nal_type, nal_header, size);
}
g_ptr_array_free (paybufs, TRUE);
return ret;
}
static GstFlowReturn
gst_rtp_h265_pay_payload_nal_single (GstRTPBasePayload * basepayload,
GstBuffer * paybuf, GstClockTime dts, GstClockTime pts, gboolean marker)
{
GstBufferList *outlist;
GstBuffer *outbuf;
GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
/* use buffer lists
* create buffer without payload containing only the RTP header
* (memory block at index 0) */
outbuf = gst_rtp_buffer_new_allocate (0, 0, 0);
gst_rtp_buffer_map (outbuf, GST_MAP_WRITE, &rtp);
/* Mark the end of a frame */
gst_rtp_buffer_set_marker (&rtp, marker);
/* timestamp the outbuffer */
GST_BUFFER_PTS (outbuf) = pts;
GST_BUFFER_DTS (outbuf) = dts;
/* insert payload memory block */
gst_rtp_copy_video_meta (basepayload, outbuf, paybuf);
outbuf = gst_buffer_append (outbuf, paybuf);
outlist = gst_buffer_list_new ();
/* add the buffer to the buffer list */
gst_buffer_list_add (outlist, outbuf);
gst_rtp_buffer_unmap (&rtp);
/* push the list to the next element in the pipe */
return gst_rtp_base_payload_push_list (basepayload, outlist);
}
static GstFlowReturn
gst_rtp_h265_pay_payload_nal_fragment (GstRTPBasePayload * basepayload,
GstBuffer * paybuf, GstClockTime dts, GstClockTime pts, gboolean marker,
guint mtu, guint8 nal_type, const guint8 * nal_header, int size)
{
GstRtpH265Pay *rtph265pay = (GstRtpH265Pay *) basepayload;
GstFlowReturn ret;
guint max_fragment_size, ii, pos;
GstBuffer *outbuf;
GstBufferList *outlist = NULL;
GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
guint8 *payload;
if (gst_rtp_buffer_calc_packet_len (size, 0, 0) < mtu) {
GST_DEBUG_OBJECT (rtph265pay,
"NAL Unit fit in one packet datasize=%d mtu=%d", size, mtu);
/* will fit in one packet */
return gst_rtp_h265_pay_payload_nal_single (basepayload, paybuf, dts, pts,
marker);
}
GST_DEBUG_OBJECT (basepayload,
"NAL Unit DOES NOT fit in one packet datasize=%d mtu=%d", size, mtu);
GST_DEBUG_OBJECT (basepayload, "Using FU fragmentation for data size=%d",
size - 2);
/* We keep 3 bytes for PayloadHdr and FU Header */
max_fragment_size = gst_rtp_buffer_calc_payload_len (mtu - 3, 0, 0);
outlist = gst_buffer_list_new ();
for (pos = 2, ii = 0; pos < size; pos += max_fragment_size, ii++) {
guint remaining, fragment_size;
gboolean first_fragment, last_fragment;
remaining = size - pos;
fragment_size = MIN (remaining, max_fragment_size);
first_fragment = (pos == 2);
last_fragment = (remaining <= max_fragment_size);
GST_DEBUG_OBJECT (basepayload,
"Inside FU fragmentation fragment_size=%u iteration=%d %s%s",
fragment_size, ii, first_fragment ? "first" : "",
last_fragment ? "last" : "");
/* use buffer lists
* create buffer without payload containing only the RTP header
* (memory block at index 0), and with space for PayloadHdr and FU header */
outbuf = gst_rtp_buffer_new_allocate (3, 0, 0);
gst_rtp_buffer_map (outbuf, GST_MAP_WRITE, &rtp);
GST_BUFFER_DTS (outbuf) = dts;
GST_BUFFER_PTS (outbuf) = pts;
payload = gst_rtp_buffer_get_payload (&rtp);
/* PayloadHdr (type = FU_TYPE_ID (49)) */
payload[0] = (nal_header[0] & 0x81) | (FU_TYPE_ID << 1);
payload[1] = nal_header[1];
/* If it's the last fragment and the end of this au, mark the end of
* slice */
gst_rtp_buffer_set_marker (&rtp, last_fragment && marker);
/* FU Header */
payload[2] = (first_fragment << 7) | (last_fragment << 6) |
(nal_type & 0x3f);
gst_rtp_buffer_unmap (&rtp);
/* insert payload memory block */
gst_rtp_copy_video_meta (rtph265pay, outbuf, paybuf);
gst_buffer_copy_into (outbuf, paybuf, GST_BUFFER_COPY_MEMORY, pos,
fragment_size);
/* add the buffer to the buffer list */
gst_buffer_list_add (outlist, outbuf);
}
ret = gst_rtp_base_payload_push_list (basepayload, outlist);
gst_buffer_unref (paybuf);
return ret;
}
static GstFlowReturn
gst_rtp_h265_pay_send_bundle (GstRtpH265Pay * rtph265pay, gboolean marker)
{
GstRTPBasePayload *basepayload;
GstBufferList *bundle;
guint length, bundle_size;
GstBuffer *first, *outbuf;
GstClockTime dts, pts;
bundle_size = rtph265pay->bundle_size;
if (bundle_size == 0) {
GST_DEBUG_OBJECT (rtph265pay, "no bundle, nothing to send");
return GST_FLOW_OK;
}
basepayload = GST_RTP_BASE_PAYLOAD (rtph265pay);
bundle = rtph265pay->bundle;
length = gst_buffer_list_length (bundle);
first = gst_buffer_list_get (bundle, 0);
dts = GST_BUFFER_DTS (first);
pts = GST_BUFFER_PTS (first);
if (length == 1) {
/* Push unaggregated NALU */
outbuf = gst_buffer_ref (first);
GST_DEBUG_OBJECT (rtph265pay,
"sending NAL Unit unaggregated: datasize=%u", bundle_size - 2);
} else {
guint8 ap_header[2];
guint i;
guint8 layer_id = 0xFF;
guint8 temporal_id = 0xFF;
outbuf = gst_buffer_new_allocate (NULL, sizeof ap_header, NULL);
for (i = 0; i < length; i++) {
GstBuffer *buf = gst_buffer_list_get (bundle, i);
guint8 nal_header[2];
GstMemory *size_header;
GstMapInfo map;
guint8 nal_layer_id;
guint8 nal_temporal_id;
gst_buffer_extract (buf, 0, &nal_header, sizeof nal_header);
/* Propagate F bit */
if ((nal_header[0] & 0x80))
ap_header[0] |= 0x80;
/* Select lowest layer_id & temporal_id */
nal_layer_id = ((nal_header[0] & 0x01) << 5) |
((nal_header[1] >> 3) & 0x1F);
nal_temporal_id = nal_header[1] & 0x7;
layer_id = MIN (layer_id, nal_layer_id);
temporal_id = MIN (temporal_id, nal_temporal_id);
/* append NALU size */
size_header = gst_allocator_alloc (NULL, 2, NULL);
gst_memory_map (size_header, &map, GST_MAP_WRITE);
GST_WRITE_UINT16_BE (map.data, gst_buffer_get_size (buf));
gst_memory_unmap (size_header, &map);
gst_buffer_append_memory (outbuf, size_header);
/* append NALU data */
outbuf = gst_buffer_append (outbuf, gst_buffer_ref (buf));
}
ap_header[0] = (AP_TYPE_ID << 1) | (layer_id & 0x20);
ap_header[1] = ((layer_id & 0x1F) << 3) | (temporal_id & 0x07);
gst_buffer_fill (outbuf, 0, &ap_header, sizeof ap_header);
GST_DEBUG_OBJECT (rtph265pay,
"sending AP bundle: n=%u header=%02x%02x datasize=%u",
length, ap_header[0], ap_header[1], bundle_size);
}
gst_rtp_h265_pay_reset_bundle (rtph265pay);
return gst_rtp_h265_pay_payload_nal_single (basepayload, outbuf, dts, pts,
marker);
}
static gboolean
gst_rtp_h265_pay_payload_nal_bundle (GstRTPBasePayload * basepayload,
GstBuffer * paybuf, GstClockTime dts, GstClockTime pts,
gboolean marker, guint8 nal_type, const guint8 * nal_header, int size)
{
GstRtpH265Pay *rtph265pay;
GstFlowReturn ret;
guint pay_size, bundle_size;
GstBufferList *bundle;
gboolean start_of_au;
guint mtu;
rtph265pay = GST_RTP_H265_PAY (basepayload);
mtu = GST_RTP_BASE_PAYLOAD_MTU (rtph265pay);
pay_size = 2 + gst_buffer_get_size (paybuf);
bundle = rtph265pay->bundle;
start_of_au = FALSE;
if (bundle) {
GstBuffer *first = gst_buffer_list_get (bundle, 0);
if (nal_type == GST_H265_NAL_AUD) {
GST_DEBUG_OBJECT (rtph265pay, "found access delimiter");
start_of_au = TRUE;
} else if (GST_BUFFER_IS_DISCONT (paybuf)) {
GST_DEBUG_OBJECT (rtph265pay, "found discont");
start_of_au = TRUE;
} else if (GST_BUFFER_PTS (first) != pts || GST_BUFFER_DTS (first) != dts) {
GST_DEBUG_OBJECT (rtph265pay, "found timestamp mismatch");
start_of_au = TRUE;
}
}
if (start_of_au) {
GST_DEBUG_OBJECT (rtph265pay, "sending bundle before start of AU");
ret = gst_rtp_h265_pay_send_bundle (rtph265pay, TRUE);
if (ret != GST_FLOW_OK)
goto out;
bundle = NULL;
}
bundle_size = 2 + pay_size;
if (gst_rtp_buffer_calc_packet_len (bundle_size, 0, 0) > mtu) {
GST_DEBUG_OBJECT (rtph265pay, "NAL Unit cannot fit in a bundle");
ret = gst_rtp_h265_pay_send_bundle (rtph265pay, FALSE);
if (ret != GST_FLOW_OK)
goto out;
return gst_rtp_h265_pay_payload_nal_fragment (basepayload, paybuf, dts, pts,
marker, mtu, nal_type, nal_header, size);
}
bundle_size = rtph265pay->bundle_size + pay_size;
if (gst_rtp_buffer_calc_packet_len (bundle_size, 0, 0) > mtu) {
GST_DEBUG_OBJECT (rtph265pay,
"bundle overflows, sending: bundlesize=%u datasize=2+%u mtu=%u",
rtph265pay->bundle_size, pay_size - 2, mtu);
ret = gst_rtp_h265_pay_send_bundle (rtph265pay, FALSE);
if (ret != GST_FLOW_OK)
goto out;
bundle = NULL;
}
if (!bundle) {
GST_DEBUG_OBJECT (rtph265pay, "creating new AP aggregate");
bundle = rtph265pay->bundle = gst_buffer_list_new ();
bundle_size = rtph265pay->bundle_size = 2;
rtph265pay->bundle_contains_vcl_or_suffix = FALSE;
}
GST_DEBUG_OBJECT (rtph265pay,
"bundling NAL Unit: bundlesize=%u datasize=2+%u mtu=%u",
rtph265pay->bundle_size, pay_size - 2, mtu);
paybuf = gst_buffer_make_writable (paybuf);
GST_BUFFER_PTS (paybuf) = pts;
GST_BUFFER_DTS (paybuf) = dts;
gst_buffer_list_add (bundle, gst_buffer_ref (paybuf));
rtph265pay->bundle_size += pay_size;
ret = GST_FLOW_OK;
/* In H.265, all VCL NAL units are < 32 */
if (nal_type < 32 || nal_type == GST_H265_NAL_EOS ||
nal_type == GST_H265_NAL_EOB || nal_type == GST_H265_NAL_SUFFIX_SEI ||
(nal_type >= 45 && nal_type <= 47) || (nal_type >= 56 && nal_type < 63))
rtph265pay->bundle_contains_vcl_or_suffix = TRUE;
if (marker) {
GST_DEBUG_OBJECT (rtph265pay, "sending bundle at marker");
ret = gst_rtp_h265_pay_send_bundle (rtph265pay, TRUE);
}
out:
gst_buffer_unref (paybuf);
return ret;
}
static GstFlowReturn
gst_rtp_h265_pay_handle_buffer (GstRTPBasePayload * basepayload,
GstBuffer * buffer)
{
GstRtpH265Pay *rtph265pay;
GstFlowReturn ret;
gsize size;
guint nal_len, i;
const guint8 *data;
GstClockTime dts, pts;
GArray *nal_queue;
gboolean hevc;
GstBuffer *paybuf = NULL;
gsize skip;
gboolean marker = FALSE;
gboolean discont = FALSE;
gboolean draining = (buffer == NULL);
rtph265pay = GST_RTP_H265_PAY (basepayload);
/* the input buffer contains one or more NAL units */
hevc = (rtph265pay->stream_format == GST_H265_STREAM_FORMAT_HEV1)
|| (rtph265pay->stream_format == GST_H265_STREAM_FORMAT_HVC1);
if (hevc) {
/* In hevc mode, there is no adapter, so nothing to drain */
if (draining)
return GST_FLOW_OK;
} else {
if (buffer) {
if (gst_adapter_available (rtph265pay->adapter) == 0)
discont = GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT);
marker = GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_MARKER);
gst_adapter_push (rtph265pay->adapter, buffer);
buffer = NULL;
}
/* We want to use the first TS used to construct the following NAL */
dts = gst_adapter_prev_dts (rtph265pay->adapter, NULL);
pts = gst_adapter_prev_pts (rtph265pay->adapter, NULL);
size = gst_adapter_available (rtph265pay->adapter);
/* Nothing to do here if the adapter is empty, e.g. on EOS */
if (size == 0)
return GST_FLOW_OK;
data = gst_adapter_map (rtph265pay->adapter, size);
GST_DEBUG_OBJECT (basepayload, "got %" G_GSIZE_FORMAT " bytes", size);
}
ret = GST_FLOW_OK;
/* now loop over all NAL units and put them in a packet */
if (hevc) {
GstBufferMemoryMap memory;
gsize remaining_buffer_size;
guint nal_length_size;
gsize offset = 0;
GPtrArray *paybufs;
paybufs = g_ptr_array_new ();
nal_length_size = rtph265pay->nal_length_size;
gst_buffer_memory_map (buffer, &memory);
remaining_buffer_size = gst_buffer_get_size (buffer);
pts = GST_BUFFER_PTS (buffer);
dts = GST_BUFFER_DTS (buffer);
marker = GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_MARKER);
GST_DEBUG_OBJECT (basepayload, "got %" G_GSIZE_FORMAT " bytes",
remaining_buffer_size);
while (remaining_buffer_size > nal_length_size) {
gint i;
nal_len = 0;
for (i = 0; i < nal_length_size; i++) {
nal_len = (nal_len << 8) + *memory.data;
if (!gst_buffer_memory_advance_bytes (&memory, 1))
break;
}
offset += nal_length_size;
remaining_buffer_size -= nal_length_size;
if (remaining_buffer_size >= nal_len) {
GST_DEBUG_OBJECT (basepayload, "got NAL of size %u", nal_len);
} else {
nal_len = remaining_buffer_size;
GST_DEBUG_OBJECT (basepayload, "got incomplete NAL of size %u",
nal_len);
}
paybuf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL, offset,
nal_len);
g_ptr_array_add (paybufs, paybuf);
/* If we're at the end of the buffer, then we're at the end of the
* access unit
*/
GST_BUFFER_FLAG_UNSET (paybuf, GST_BUFFER_FLAG_MARKER);
if (remaining_buffer_size - nal_len <= nal_length_size) {
if (rtph265pay->alignment == GST_H265_ALIGNMENT_AU || marker)
GST_BUFFER_FLAG_SET (paybuf, GST_BUFFER_FLAG_MARKER);
}
GST_BUFFER_FLAG_UNSET (paybuf, GST_BUFFER_FLAG_DISCONT);
if (discont) {
GST_BUFFER_FLAG_SET (paybuf, GST_BUFFER_FLAG_DISCONT);
discont = FALSE;
}
/* Skip current nal. If it is split over multiple GstMemory
* advance_bytes () will switch to the correct GstMemory. The payloader
* does not access those bytes directly but uses gst_buffer_copy_region ()
* to create a sub-buffer referencing the nal instead */
if (!gst_buffer_memory_advance_bytes (&memory, nal_len))
break;
offset += nal_len;
remaining_buffer_size -= nal_len;
}
ret = gst_rtp_h265_pay_payload_nal (basepayload, paybufs, dts, pts);
gst_buffer_memory_unmap (&memory);
gst_buffer_unref (buffer);
} else {
guint next;
gboolean update = FALSE;
GPtrArray *paybufs;
/* get offset of first start code */
next = next_start_code (data, size);
/* skip to start code, if no start code is found, next will be size and we
* will not collect data. */
data += next;
size -= next;
nal_queue = rtph265pay->queue;
skip = next;
/* array must be empty when we get here */
g_assert (nal_queue->len == 0);
GST_DEBUG_OBJECT (basepayload,
"found first start at %u, bytes left %" G_GSIZE_FORMAT, next, size);
paybufs = g_ptr_array_new ();
/* first pass to locate NALs and parse VPS/SPS/PPS */
while (size > 4) {
/* skip start code */
data += 3;
size -= 3;
/* use next_start_code() to scan buffer.
* next_start_code() returns the offset in data,
* starting from zero to the first byte of 0.0.0.1
* If no start code is found, it returns the value of the
* 'size' parameter.
* data is unchanged by the call to next_start_code()
*/
next = next_start_code (data, size);
/* nal or au aligned input needs no delaying until next time */
if (next == size && !draining &&
rtph265pay->alignment == GST_H265_ALIGNMENT_UNKNOWN) {
/* Didn't find the start of next NAL and it's not EOS,
* handle it next time */
break;
}
/* nal length is distance to next start code */
nal_len = next;
GST_DEBUG_OBJECT (basepayload, "found next start at %u of size %u", next,
nal_len);
/* We know our stream is a valid H265 NAL packet,
* go parse it for VPS/SPS/PPS to enrich the caps */
/* order: make sure to check nal */
update = gst_rtp_h265_pay_decode_nal (rtph265pay, data, nal_len, dts, pts)
|| update;
/* move to next NAL packet */
data += nal_len;
size -= nal_len;
g_array_append_val (nal_queue, nal_len);
}
/* if has new VPS, SPS & PPS, update the output caps */
if (G_UNLIKELY (update))
if (!gst_rtp_h265_pay_set_vps_sps_pps (basepayload))
goto caps_rejected;
/* second pass to payload and push */
if (nal_queue->len != 0)
gst_adapter_flush (rtph265pay->adapter, skip);
for (i = 0; i < nal_queue->len; i++) {
guint size;
nal_len = g_array_index (nal_queue, guint, i);
/* skip start code */
gst_adapter_flush (rtph265pay->adapter, 3);
/* Trim the end unless we're the last NAL in the stream.
* In case we're not at the end of the buffer we know the next block
* starts with 0x000001 so all the 0x00 bytes at the end of this one are
* trailing 0x0 that can be discarded */
size = nal_len;
data = gst_adapter_map (rtph265pay->adapter, size);
if (i + 1 != nal_queue->len || !draining)
for (; size > 2 && data[size - 1] == 0x0; size--)
/* skip */ ;
paybuf = gst_adapter_take_buffer (rtph265pay->adapter, size);
g_assert (paybuf);
g_ptr_array_add (paybufs, paybuf);
/* If it's the last nal unit we have in non-bytestream mode, we can
* assume it's the end of an access-unit */
GST_BUFFER_FLAG_UNSET (paybuf, GST_BUFFER_FLAG_MARKER);
if (i == nal_queue->len - 1) {
if (rtph265pay->alignment == GST_H265_ALIGNMENT_AU ||
marker || draining)
GST_BUFFER_FLAG_SET (paybuf, GST_BUFFER_FLAG_MARKER);
}
GST_BUFFER_FLAG_UNSET (paybuf, GST_BUFFER_FLAG_DISCONT);
if (discont) {
GST_BUFFER_FLAG_SET (paybuf, GST_BUFFER_FLAG_DISCONT);
discont = FALSE;
}
/* move to next NAL packet */
/* Skips the trailing zeros */
gst_adapter_flush (rtph265pay->adapter, nal_len - size);
}
/* put the data in one or more RTP packets */
ret = gst_rtp_h265_pay_payload_nal (basepayload, paybufs, dts, pts);
g_array_set_size (nal_queue, 0);
}
if (ret == GST_FLOW_OK && rtph265pay->bundle_size > 0 &&
rtph265pay->aggregate_mode == GST_RTP_H265_AGGREGATE_ZERO_LATENCY &&
rtph265pay->bundle_contains_vcl_or_suffix) {
GST_DEBUG_OBJECT (rtph265pay, "sending bundle at end incoming packet");
ret = gst_rtp_h265_pay_send_bundle (rtph265pay, FALSE);
}
done:
if (!hevc) {
gst_adapter_unmap (rtph265pay->adapter);
}
return ret;
caps_rejected:
{
GST_WARNING_OBJECT (basepayload, "Could not set outcaps");
g_array_set_size (nal_queue, 0);
ret = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
}
static gboolean
gst_rtp_h265_pay_sink_event (GstRTPBasePayload * payload, GstEvent * event)
{
gboolean res;
const GstStructure *s;
GstRtpH265Pay *rtph265pay = GST_RTP_H265_PAY (payload);
GstFlowReturn ret = GST_FLOW_OK;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
gst_adapter_clear (rtph265pay->adapter);
gst_rtp_h265_pay_reset_bundle (rtph265pay);
break;
case GST_EVENT_CUSTOM_DOWNSTREAM:
s = gst_event_get_structure (event);
if (gst_structure_has_name (s, "GstForceKeyUnit")) {
gboolean resend_codec_data;
if (gst_structure_get_boolean (s, "all-headers",
&resend_codec_data) && resend_codec_data)
rtph265pay->send_vps_sps_pps = TRUE;
}
break;
case GST_EVENT_EOS:
{
/* call handle_buffer with NULL to flush last NAL from adapter
* in byte-stream mode
*/
gst_rtp_h265_pay_handle_buffer (payload, NULL);
ret = gst_rtp_h265_pay_send_bundle (rtph265pay, TRUE);
break;
}
case GST_EVENT_STREAM_START:
GST_DEBUG_OBJECT (rtph265pay,
"New stream detected => Clear VPS, SPS and PPS");
gst_rtp_h265_pay_clear_vps_sps_pps (rtph265pay);
break;
default:
break;
}
if (ret != GST_FLOW_OK)
return FALSE;
res = GST_RTP_BASE_PAYLOAD_CLASS (parent_class)->sink_event (payload, event);
return res;
}
static GstStateChangeReturn
gst_rtp_h265_pay_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstRtpH265Pay *rtph265pay = GST_RTP_H265_PAY (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
rtph265pay->send_vps_sps_pps = FALSE;
gst_adapter_clear (rtph265pay->adapter);
gst_rtp_h265_pay_reset_bundle (rtph265pay);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
rtph265pay->last_vps_sps_pps = -1;
gst_rtp_h265_pay_clear_vps_sps_pps (rtph265pay);
break;
default:
break;
}
return ret;
}
static void
gst_rtp_h265_pay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRtpH265Pay *rtph265pay;
rtph265pay = GST_RTP_H265_PAY (object);
switch (prop_id) {
case PROP_CONFIG_INTERVAL:
rtph265pay->vps_sps_pps_interval = g_value_get_int (value);
break;
case PROP_AGGREGATE_MODE:
rtph265pay->aggregate_mode = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rtp_h265_pay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstRtpH265Pay *rtph265pay;
rtph265pay = GST_RTP_H265_PAY (object);
switch (prop_id) {
case PROP_CONFIG_INTERVAL:
g_value_set_int (value, rtph265pay->vps_sps_pps_interval);
break;
case PROP_AGGREGATE_MODE:
g_value_set_enum (value, rtph265pay->aggregate_mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
gboolean
gst_rtp_h265_pay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtph265pay",
GST_RANK_SECONDARY, GST_TYPE_RTP_H265_PAY);
}
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