mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-14 13:21:28 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/gst/videoparsers/gsth265parse.c

2051 lines
63 KiB
C
Raw Blame History

/* GStreamer H.265 Parser
* Copyright (C) 2013 Intel Corporation
* Contact:Sreerenj Balachandran <sreerenj.balachandran@intel.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 <gst/base/base.h>
#include <gst/pbutils/pbutils.h>
#include <gst/video/video.h>
#include "gsth265parse.h"
#include <string.h>
GST_DEBUG_CATEGORY (h265_parse_debug);
#define GST_CAT_DEFAULT h265_parse_debug
#define DEFAULT_CONFIG_INTERVAL (0)
enum
{
PROP_0,
PROP_CONFIG_INTERVAL,
PROP_LAST
};
enum
{
GST_H265_PARSE_FORMAT_NONE,
GST_H265_PARSE_FORMAT_HVC1,
GST_H265_PARSE_FORMAT_HEV1,
GST_H265_PARSE_FORMAT_BYTE
};
enum
{
GST_H265_PARSE_ALIGN_NONE = 0,
GST_H265_PARSE_ALIGN_NAL,
GST_H265_PARSE_ALIGN_AU
};
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-h265"));
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-h265, parsed = (boolean) true, "
"stream-format=(string) { hvc1, hev1, byte-stream }, "
"alignment=(string) { au, nal }"));
#define parent_class gst_h265_parse_parent_class
G_DEFINE_TYPE (GstH265Parse, gst_h265_parse, GST_TYPE_BASE_PARSE);
static void gst_h265_parse_finalize (GObject * object);
static gboolean gst_h265_parse_start (GstBaseParse * parse);
static gboolean gst_h265_parse_stop (GstBaseParse * parse);
static GstFlowReturn gst_h265_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize);
static GstFlowReturn gst_h265_parse_parse_frame (GstBaseParse * parse,
GstBaseParseFrame * frame);
static GstFlowReturn gst_h265_parse_pre_push_frame (GstBaseParse * parse,
GstBaseParseFrame * frame);
static void gst_h265_parse_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_h265_parse_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_h265_parse_set_caps (GstBaseParse * parse, GstCaps * caps);
static GstCaps *gst_h265_parse_get_caps (GstBaseParse * parse,
GstCaps * filter);
static gboolean gst_h265_parse_event (GstBaseParse * parse, GstEvent * event);
static gboolean gst_h265_parse_src_event (GstBaseParse * parse,
GstEvent * event);
static void
gst_h265_parse_class_init (GstH265ParseClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBaseParseClass *parse_class = GST_BASE_PARSE_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (h265_parse_debug, "h265parse", 0, "h265 parser");
gobject_class->finalize = gst_h265_parse_finalize;
gobject_class->set_property = gst_h265_parse_set_property;
gobject_class->get_property = gst_h265_parse_get_property;
g_object_class_install_property (gobject_class, PROP_CONFIG_INTERVAL,
g_param_spec_uint ("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)",
0, 3600, DEFAULT_CONFIG_INTERVAL,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
/* Override BaseParse vfuncs */
parse_class->start = GST_DEBUG_FUNCPTR (gst_h265_parse_start);
parse_class->stop = GST_DEBUG_FUNCPTR (gst_h265_parse_stop);
parse_class->handle_frame = GST_DEBUG_FUNCPTR (gst_h265_parse_handle_frame);
parse_class->pre_push_frame =
GST_DEBUG_FUNCPTR (gst_h265_parse_pre_push_frame);
parse_class->set_sink_caps = GST_DEBUG_FUNCPTR (gst_h265_parse_set_caps);
parse_class->get_sink_caps = GST_DEBUG_FUNCPTR (gst_h265_parse_get_caps);
parse_class->sink_event = GST_DEBUG_FUNCPTR (gst_h265_parse_event);
parse_class->src_event = GST_DEBUG_FUNCPTR (gst_h265_parse_src_event);
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&srctemplate));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&sinktemplate));
gst_element_class_set_static_metadata (gstelement_class, "H.265 parser",
"Codec/Parser/Converter/Video",
"Parses H.265 streams",
"Sreerenj Balachandran <sreerenj.balachandran@intel.com>");
}
static void
gst_h265_parse_init (GstH265Parse * h265parse)
{
h265parse->frame_out = gst_adapter_new ();
gst_base_parse_set_pts_interpolation (GST_BASE_PARSE (h265parse), FALSE);
GST_PAD_SET_ACCEPT_INTERSECT (GST_BASE_PARSE_SINK_PAD (h265parse));
}
static void
gst_h265_parse_finalize (GObject * object)
{
GstH265Parse *h265parse = GST_H265_PARSE (object);
g_object_unref (h265parse->frame_out);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_h265_parse_reset_frame (GstH265Parse * h265parse)
{
GST_DEBUG_OBJECT (h265parse, "reset frame");
/* done parsing; reset state */
h265parse->current_off = -1;
h265parse->picture_start = FALSE;
h265parse->update_caps = FALSE;
h265parse->idr_pos = -1;
h265parse->sei_pos = -1;
h265parse->keyframe = FALSE;
gst_adapter_clear (h265parse->frame_out);
}
static void
gst_h265_parse_reset (GstH265Parse * h265parse)
{
h265parse->width = 0;
h265parse->height = 0;
h265parse->fps_num = 0;
h265parse->fps_den = 0;
h265parse->upstream_par_n = -1;
h265parse->upstream_par_d = -1;
h265parse->parsed_par_n = 0;
h265parse->parsed_par_n = 0;
gst_buffer_replace (&h265parse->codec_data, NULL);
gst_buffer_replace (&h265parse->codec_data_in, NULL);
h265parse->nal_length_size = 4;
h265parse->packetized = FALSE;
h265parse->transform = FALSE;
h265parse->align = GST_H265_PARSE_ALIGN_NONE;
h265parse->format = GST_H265_PARSE_FORMAT_NONE;
h265parse->last_report = GST_CLOCK_TIME_NONE;
h265parse->push_codec = FALSE;
h265parse->have_pps = FALSE;
h265parse->have_sps = FALSE;
h265parse->have_vps = FALSE;
h265parse->sent_codec_tag = FALSE;
h265parse->pending_key_unit_ts = GST_CLOCK_TIME_NONE;
h265parse->force_key_unit_event = NULL;
gst_h265_parse_reset_frame (h265parse);
}
static gboolean
gst_h265_parse_start (GstBaseParse * parse)
{
GstH265Parse *h265parse = GST_H265_PARSE (parse);
GST_DEBUG_OBJECT (parse, "start");
gst_h265_parse_reset (h265parse);
h265parse->nalparser = gst_h265_parser_new ();
gst_base_parse_set_min_frame_size (parse, 7);
return TRUE;
}
static gboolean
gst_h265_parse_stop (GstBaseParse * parse)
{
guint i;
GstH265Parse *h265parse = GST_H265_PARSE (parse);
GST_DEBUG_OBJECT (parse, "stop");
gst_h265_parse_reset (h265parse);
for (i = 0; i < GST_H265_MAX_SPS_COUNT; i++)
gst_buffer_replace (&h265parse->vps_nals[i], NULL);
for (i = 0; i < GST_H265_MAX_SPS_COUNT; i++)
gst_buffer_replace (&h265parse->sps_nals[i], NULL);
for (i = 0; i < GST_H265_MAX_PPS_COUNT; i++)
gst_buffer_replace (&h265parse->pps_nals[i], NULL);
gst_h265_parser_free (h265parse->nalparser);
return TRUE;
}
static const gchar *
gst_h265_parse_get_string (GstH265Parse * parse, gboolean format, gint code)
{
if (format) {
switch (code) {
case GST_H265_PARSE_FORMAT_HVC1:
return "hvc1";
case GST_H265_PARSE_FORMAT_HEV1:
return "hev1";
case GST_H265_PARSE_FORMAT_BYTE:
return "byte-stream";
default:
return "none";
}
} else {
switch (code) {
case GST_H265_PARSE_ALIGN_NAL:
return "nal";
case GST_H265_PARSE_ALIGN_AU:
return "au";
default:
return "none";
}
}
}
static void
gst_h265_parse_format_from_caps (GstCaps * caps, guint * format, guint * align)
{
g_return_if_fail (gst_caps_is_fixed (caps));
GST_DEBUG ("parsing caps: %" GST_PTR_FORMAT, caps);
if (format)
*format = GST_H265_PARSE_FORMAT_NONE;
if (align)
*align = GST_H265_PARSE_ALIGN_NONE;
if (caps && gst_caps_get_size (caps) > 0) {
GstStructure *s = gst_caps_get_structure (caps, 0);
const gchar *str = NULL;
if (format) {
if ((str = gst_structure_get_string (s, "stream-format"))) {
if (strcmp (str, "hvc1") == 0)
*format = GST_H265_PARSE_FORMAT_HVC1;
else if (strcmp (str, "hev1") == 0)
*format = GST_H265_PARSE_FORMAT_HEV1;
else if (strcmp (str, "byte-stream") == 0)
*format = GST_H265_PARSE_FORMAT_BYTE;
}
}
if (align) {
if ((str = gst_structure_get_string (s, "alignment"))) {
if (strcmp (str, "au") == 0)
*align = GST_H265_PARSE_ALIGN_AU;
else if (strcmp (str, "nal") == 0)
*align = GST_H265_PARSE_ALIGN_NAL;
}
}
}
}
/* check downstream caps to configure format and alignment */
static void
gst_h265_parse_negotiate (GstH265Parse * h265parse, gint in_format,
GstCaps * in_caps)
{
GstCaps *caps;
guint format = GST_H265_PARSE_FORMAT_NONE;
guint align = GST_H265_PARSE_ALIGN_NONE;
g_return_if_fail ((in_caps == NULL) || gst_caps_is_fixed (in_caps));
caps = gst_pad_get_allowed_caps (GST_BASE_PARSE_SRC_PAD (h265parse));
GST_DEBUG_OBJECT (h265parse, "allowed caps: %" GST_PTR_FORMAT, caps);
/* concentrate on leading structure, since decodebin2 parser
* capsfilter always includes parser template caps */
if (caps) {
caps = gst_caps_truncate (caps);
GST_DEBUG_OBJECT (h265parse, "negotiating with caps: %" GST_PTR_FORMAT,
caps);
}
if (in_caps && caps) {
if (gst_caps_can_intersect (in_caps, caps)) {
GST_DEBUG_OBJECT (h265parse, "downstream accepts upstream caps");
gst_h265_parse_format_from_caps (in_caps, &format, &align);
gst_caps_unref (caps);
caps = NULL;
}
}
if (caps) {
/* fixate to avoid ambiguity with lists when parsing */
caps = gst_caps_fixate (caps);
gst_h265_parse_format_from_caps (caps, &format, &align);
gst_caps_unref (caps);
}
/* default */
if (!format)
format = GST_H265_PARSE_FORMAT_BYTE;
if (!align)
align = GST_H265_PARSE_ALIGN_AU;
GST_DEBUG_OBJECT (h265parse, "selected format %s, alignment %s",
gst_h265_parse_get_string (h265parse, TRUE, format),
gst_h265_parse_get_string (h265parse, FALSE, align));
h265parse->format = format;
h265parse->align = align;
h265parse->transform = (in_format != h265parse->format);
}
static GstBuffer *
gst_h265_parse_wrap_nal (GstH265Parse * h265parse, guint format, guint8 * data,
guint size)
{
GstBuffer *buf;
guint nl = h265parse->nal_length_size;
guint32 tmp;
GST_DEBUG_OBJECT (h265parse, "nal length %d", size);
buf = gst_buffer_new_allocate (NULL, 4 + size, NULL);
if (format == GST_H265_PARSE_FORMAT_HVC1
|| format == GST_H265_PARSE_FORMAT_HEV1) {
tmp = GUINT32_TO_BE (size << (32 - 8 * nl));
} else {
/* HACK: nl should always be 4 here, otherwise this won't work.
* There are legit cases where nl in hevc stream is 2, but byte-stream
* SC is still always 4 bytes. */
nl = 4;
tmp = GUINT32_TO_BE (1);
}
gst_buffer_fill (buf, 0, &tmp, sizeof (guint32));
gst_buffer_fill (buf, nl, data, size);
gst_buffer_set_size (buf, size + nl);
return buf;
}
static void
gst_h265_parser_store_nal (GstH265Parse * h265parse, guint id,
GstH265NalUnitType naltype, GstH265NalUnit * nalu)
{
GstBuffer *buf, **store;
guint size = nalu->size, store_size;
if (naltype == GST_H265_NAL_VPS) {
store_size = GST_H265_MAX_VPS_COUNT;
store = h265parse->vps_nals;
GST_DEBUG_OBJECT (h265parse, "storing vps %u", id);
} else if (naltype == GST_H265_NAL_SPS) {
store_size = GST_H265_MAX_SPS_COUNT;
store = h265parse->sps_nals;
GST_DEBUG_OBJECT (h265parse, "storing sps %u", id);
} else if (naltype == GST_H265_NAL_PPS) {
store_size = GST_H265_MAX_PPS_COUNT;
store = h265parse->pps_nals;
GST_DEBUG_OBJECT (h265parse, "storing pps %u", id);
} else
return;
if (id >= store_size) {
GST_DEBUG_OBJECT (h265parse, "unable to store nal, id out-of-range %d", id);
return;
}
buf = gst_buffer_new_allocate (NULL, size, NULL);
gst_buffer_fill (buf, 0, nalu->data + nalu->offset, size);
if (store[id])
gst_buffer_unref (store[id]);
store[id] = buf;
}
#ifndef GST_DISABLE_GST_DEBUG
static const gchar *nal_names[] = {
"Slice_TRAIL_N",
"Slice_TRAIL_R",
"Slice_TSA_N",
"Slice_TSA_R",
"Slice_STSA_N",
"Slice_STSA_R",
"Slice_RADL_N",
"Slice_RADL_R",
"SLICE_RASL_N",
"SLICE_RASL_R",
"Invalid (10)",
"Invalid (11)",
"Invalid (12)",
"Invalid (13)",
"Invalid (14)",
"Invalid (15)",
"SLICE_BLA_W_LP",
"SLICE_BLA_W_RADL",
"SLICE_BLA_N_LP",
"SLICE_IDR_W_RADL",
"SLICE_IDR_N_LP",
"SLICE_CRA_NUT",
"Invalid (22)",
"Invalid (23)",
"Invalid (24)",
"Invalid (25)",
"Invalid (26)",
"Invalid (27)",
"Invalid (28)",
"Invalid (29)",
"Invalid (30)",
"Invalid (31)",
"VPS",
"SPS",
"PPS",
"AUD",
"EOS",
"EOB",
"FD",
"PREFIX_SEI",
"SUFFIX_SEI"
};
static const gchar *
_nal_name (GstH265NalUnitType nal_type)
{
if (nal_type <= GST_H265_NAL_SUFFIX_SEI)
return nal_names[nal_type];
return "Invalid";
}
#endif
/* caller guarantees 2 bytes of nal payload */
static void
gst_h265_parse_process_nal (GstH265Parse * h265parse, GstH265NalUnit * nalu)
{
GstH265PPS pps = { 0, };
GstH265SPS sps = { 0, };
GstH265VPS vps = { 0, };
gboolean is_irap;
guint nal_type;
GstH265Parser *nalparser = h265parse->nalparser;
GstH265ParserResult pres = GST_H265_PARSER_ERROR;
/* nothing to do for broken input */
if (G_UNLIKELY (nalu->size < 3)) {
GST_DEBUG_OBJECT (h265parse, "not processing nal size %u", nalu->size);
return;
}
/* we have a peek as well */
nal_type = nalu->type;
GST_DEBUG_OBJECT (h265parse, "processing nal of type %u %s, size %u",
nal_type, _nal_name (nal_type), nalu->size);
switch (nal_type) {
case GST_H265_NAL_VPS:
/* It is not mandatory to have VPS in the stream. But it might
* be needed for other extensions like svc */
pres = gst_h265_parser_parse_vps (nalparser, nalu, &vps);
if (pres != GST_H265_PARSER_OK)
GST_WARNING_OBJECT (h265parse, "failed to parse VPS");
GST_DEBUG_OBJECT (h265parse, "triggering src caps check");
h265parse->update_caps = TRUE;
h265parse->have_vps = TRUE;
if (h265parse->push_codec && h265parse->have_pps) {
/* VPS/SPS/PPS found in stream before the first pre_push_frame, no need
* to forcibly push at start */
GST_INFO_OBJECT (h265parse, "have VPS/SPS/PPS in stream");
h265parse->push_codec = FALSE;
h265parse->have_vps = FALSE;
h265parse->have_sps = FALSE;
h265parse->have_pps = FALSE;
}
gst_h265_parser_store_nal (h265parse, vps.id, nal_type, nalu);
break;
case GST_H265_NAL_SPS:
pres = gst_h265_parser_parse_sps (nalparser, nalu, &sps, TRUE);
/* arranged for a fallback sps.id, so use that one and only warn */
if (pres != GST_H265_PARSER_OK)
GST_WARNING_OBJECT (h265parse, "failed to parse SPS:");
GST_DEBUG_OBJECT (h265parse, "triggering src caps check");
h265parse->update_caps = TRUE;
h265parse->have_sps = TRUE;
if (h265parse->push_codec && h265parse->have_pps) {
/* SPS and PPS found in stream before the first pre_push_frame, no need
* to forcibly push at start */
GST_INFO_OBJECT (h265parse, "have SPS/PPS in stream");
h265parse->push_codec = FALSE;
h265parse->have_sps = FALSE;
h265parse->have_pps = FALSE;
}
gst_h265_parser_store_nal (h265parse, sps.id, nal_type, nalu);
break;
case GST_H265_NAL_PPS:
pres = gst_h265_parser_parse_pps (nalparser, nalu, &pps);
/* arranged for a fallback pps.id, so use that one and only warn */
if (pres != GST_H265_PARSER_OK)
GST_WARNING_OBJECT (h265parse, "failed to parse PPS:");
/* parameters might have changed, force caps check */
if (!h265parse->have_pps) {
GST_DEBUG_OBJECT (h265parse, "triggering src caps check");
h265parse->update_caps = TRUE;
}
h265parse->have_pps = TRUE;
if (h265parse->push_codec && h265parse->have_sps) {
/* SPS and PPS found in stream before the first pre_push_frame, no need
* to forcibly push at start */
GST_INFO_OBJECT (h265parse, "have SPS/PPS in stream");
h265parse->push_codec = FALSE;
h265parse->have_sps = FALSE;
h265parse->have_pps = FALSE;
}
gst_h265_parser_store_nal (h265parse, pps.id, nal_type, nalu);
break;
case GST_H265_NAL_PREFIX_SEI:
case GST_H265_NAL_SUFFIX_SEI:
/*Fixme: parse sei messages */
/* mark SEI pos */
if (h265parse->sei_pos == -1) {
if (h265parse->transform)
h265parse->sei_pos = gst_adapter_available (h265parse->frame_out);
else
h265parse->sei_pos = nalu->sc_offset;
GST_DEBUG_OBJECT (h265parse, "marking SEI in frame at offset %d",
h265parse->sei_pos);
}
break;
case GST_H265_NAL_SLICE_TRAIL_N:
case GST_H265_NAL_SLICE_TRAIL_R:
case GST_H265_NAL_SLICE_TSA_N:
case GST_H265_NAL_SLICE_TSA_R:
case GST_H265_NAL_SLICE_STSA_N:
case GST_H265_NAL_SLICE_STSA_R:
case GST_H265_NAL_SLICE_RADL_N:
case GST_H265_NAL_SLICE_RADL_R:
case GST_H265_NAL_SLICE_RASL_N:
case GST_H265_NAL_SLICE_RASL_R:
case GST_H265_NAL_SLICE_BLA_W_LP:
case GST_H265_NAL_SLICE_BLA_W_RADL:
case GST_H265_NAL_SLICE_BLA_N_LP:
case GST_H265_NAL_SLICE_IDR_W_RADL:
case GST_H265_NAL_SLICE_IDR_N_LP:
case GST_H265_NAL_SLICE_CRA_NUT:
{
GstH265SliceHdr slice;
pres = gst_h265_parser_parse_slice_hdr (nalparser, nalu, &slice);
if (pres == GST_H265_PARSER_OK) {
if (GST_H265_IS_I_SLICE (&slice))
h265parse->keyframe |= TRUE;
}
if (slice.first_slice_segment_in_pic_flag == 1)
GST_DEBUG_OBJECT (h265parse,
"frame start, first_slice_segment_in_pic_flag = 1");
GST_DEBUG_OBJECT (h265parse,
"parse result %d, first slice_segment: %u, slice type: %u",
pres, slice.first_slice_segment_in_pic_flag, slice.type);
gst_h265_slice_hdr_free (&slice);
}
is_irap = ((nal_type >= GST_H265_NAL_SLICE_BLA_W_LP)
&& (nal_type <= GST_H265_NAL_SLICE_CRA_NUT)) ? TRUE : FALSE;
if (G_LIKELY (!is_irap && !h265parse->push_codec))
break;
/* if we need to sneak codec NALs into the stream,
* this is a good place, so fake it as IDR
* (which should be at start anyway) */
/* mark where config needs to go if interval expired */
/* mind replacement buffer if applicable */
if (h265parse->idr_pos == -1) {
if (h265parse->transform)
h265parse->idr_pos = gst_adapter_available (h265parse->frame_out);
else
h265parse->idr_pos = nalu->sc_offset;
GST_DEBUG_OBJECT (h265parse, "marking IDR in frame at offset %d",
h265parse->idr_pos);
}
/* if SEI preceeds (faked) IDR, then we have to insert config there */
if (h265parse->sei_pos >= 0 && h265parse->idr_pos > h265parse->sei_pos) {
h265parse->idr_pos = h265parse->sei_pos;
GST_DEBUG_OBJECT (h265parse, "moved IDR mark to SEI position %d",
h265parse->idr_pos);
}
break;
default:
gst_h265_parser_parse_nal (nalparser, nalu);
}
/* if HEVC output needed, collect properly prefixed nal in adapter,
* and use that to replace outgoing buffer data later on */
if (h265parse->transform) {
GstBuffer *buf;
GST_LOG_OBJECT (h265parse, "collecting NAL in HEVC frame");
buf = gst_h265_parse_wrap_nal (h265parse, h265parse->format,
nalu->data + nalu->offset, nalu->size);
gst_adapter_push (h265parse->frame_out, buf);
}
}
/* caller guarantees at least 3 bytes of nal payload for each nal
* returns TRUE if next_nal indicates that nal terminates an AU */
static inline gboolean
gst_h265_parse_collect_nal (GstH265Parse * h265parse, const guint8 * data,
guint size, GstH265NalUnit * nalu)
{
gboolean complete;
GstH265ParserResult parse_res;
GstH265NalUnitType nal_type = nalu->type;
GstH265NalUnit nnalu;
GST_DEBUG_OBJECT (h265parse, "parsing collected nal");
parse_res = gst_h265_parser_identify_nalu (h265parse->nalparser, data,
nalu->offset + nalu->size, size, &nnalu);
if (parse_res == GST_H265_PARSER_ERROR)
return FALSE;
/* determine if AU complete */
GST_LOG_OBJECT (h265parse, "nal type: %d %s", nal_type, _nal_name (nal_type));
/* coded slice NAL starts a picture,
* i.e. other types become aggregated in front of it */
h265parse->picture_start |= ((nal_type >= GST_H265_NAL_SLICE_TRAIL_N
&& nal_type <= GST_H265_NAL_SLICE_TRAIL_R)
|| (nal_type >= GST_H265_NAL_SLICE_BLA_W_LP
&& nal_type <= RESERVED_IRAP_NAL_TYPE_MAX));
/* consider a coded slices (IRAP or not) to start a picture,
* (so ending the previous one) if first_slice_segment_in_pic_flag == 1*/
nal_type = nnalu.type;
complete = h265parse->picture_start && ((nal_type >= GST_H265_NAL_VPS
&& nal_type <= GST_H265_NAL_AUD)
|| nal_type == GST_H265_NAL_PREFIX_SEI || (nal_type >= 41
&& nal_type <= 44) || (nal_type >= 48 && nal_type <= 55));
GST_LOG_OBJECT (h265parse, "next nal type: %d %s", nal_type,
_nal_name (nal_type));
/* Any VCL Nal unit with first_slice_segment_in_pic_flag == 1 considered start of frame */
complete |= h265parse->picture_start
&& (((nal_type >= GST_H265_NAL_SLICE_TRAIL_N
&& nal_type <= GST_H265_NAL_SLICE_TRAIL_R)
|| (nal_type >= GST_H265_NAL_SLICE_BLA_W_LP
&& nal_type <= RESERVED_IRAP_NAL_TYPE_MAX))
&& (nnalu.data[nnalu.offset + 2] & 0x80));
GST_LOG_OBJECT (h265parse, "au complete: %d", complete);
return complete;
}
static GstFlowReturn
gst_h265_parse_handle_frame_packetized (GstBaseParse * parse,
GstBaseParseFrame * frame)
{
GstH265Parse *h265parse = GST_H265_PARSE (parse);
GstBuffer *buffer = frame->buffer;
GstFlowReturn ret = GST_FLOW_OK;
GstH265ParserResult parse_res;
GstH265NalUnit nalu;
const guint nl = h265parse->nal_length_size;
GstMapInfo map;
gint left;
if (nl < 1 || nl > 4) {
GST_DEBUG_OBJECT (h265parse, "insufficient data to split input");
return GST_FLOW_NOT_NEGOTIATED;
}
/* need to save buffer from invalidation upon _finish_frame */
if (h265parse->split_packetized)
buffer = gst_buffer_copy (frame->buffer);
gst_buffer_map (buffer, &map, GST_MAP_READ);
left = map.size;
GST_LOG_OBJECT (h265parse,
"processing packet buffer of size %" G_GSIZE_FORMAT, map.size);
parse_res = gst_h265_parser_identify_nalu_hevc (h265parse->nalparser,
map.data, 0, map.size, nl, &nalu);
while (parse_res == GST_H265_PARSER_OK) {
GST_DEBUG_OBJECT (h265parse, "HEVC nal offset %d", nalu.offset + nalu.size);
/* either way, have a look at it */
gst_h265_parse_process_nal (h265parse, &nalu);
/* dispatch per NALU if needed */
if (h265parse->split_packetized) {
/* note we don't need to come up with a sub-buffer, since
* subsequent code only considers input buffer's metadata.
* Real data is either taken from input by baseclass or
* a replacement output buffer is provided anyway. */
gst_h265_parse_parse_frame (parse, frame);
ret = gst_base_parse_finish_frame (parse, frame, nl + nalu.size);
left -= nl + nalu.size;
}
parse_res = gst_h265_parser_identify_nalu_hevc (h265parse->nalparser,
map.data, nalu.offset + nalu.size, map.size, nl, &nalu);
}
gst_buffer_unmap (buffer, &map);
if (!h265parse->split_packetized) {
gst_h265_parse_parse_frame (parse, frame);
ret = gst_base_parse_finish_frame (parse, frame, map.size);
} else {
gst_buffer_unref (buffer);
if (G_UNLIKELY (left)) {
/* should not be happening for nice HEVC */
GST_WARNING_OBJECT (parse, "skipping leftover HEVC data %d", left);
frame->flags |= GST_BASE_PARSE_FRAME_FLAG_DROP;
ret = gst_base_parse_finish_frame (parse, frame, map.size);
}
}
if (parse_res == GST_H265_PARSER_NO_NAL_END ||
parse_res == GST_H265_PARSER_BROKEN_DATA) {
if (h265parse->split_packetized) {
GST_ELEMENT_ERROR (h265parse, STREAM, FAILED, (NULL),
("invalid HEVC input data"));
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
} else {
/* do not meddle to much in this case */
GST_DEBUG_OBJECT (h265parse, "parsing packet failed");
}
}
return ret;
}
static GstFlowReturn
gst_h265_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstH265Parse *h265parse = GST_H265_PARSE (parse);
GstBuffer *buffer = frame->buffer;
GstMapInfo map;
guint8 *data;
gsize size;
gint current_off = 0;
gboolean drain, nonext;
GstH265Parser *nalparser = h265parse->nalparser;
GstH265NalUnit nalu;
GstH265ParserResult pres;
gint framesize;
/* delegate in packetized case, no skipping should be needed */
if (h265parse->packetized)
return gst_h265_parse_handle_frame_packetized (parse, frame);
gst_buffer_map (buffer, &map, GST_MAP_READ);
data = map.data;
size = map.size;
/* expect at least 3 bytes startcode == sc, and 3 bytes NALU payload */
if (G_UNLIKELY (size < 6)) {
gst_buffer_unmap (buffer, &map);
*skipsize = 1;
return GST_FLOW_OK;
}
/* need to configure aggregation */
if (G_UNLIKELY (h265parse->format == GST_H265_PARSE_FORMAT_NONE))
gst_h265_parse_negotiate (h265parse, GST_H265_PARSE_FORMAT_BYTE, NULL);
/* avoid stale cached parsing state */
if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME) {
GST_LOG_OBJECT (h265parse, "parsing new frame");
gst_h265_parse_reset_frame (h265parse);
} else {
GST_LOG_OBJECT (h265parse, "resuming frame parsing");
}
drain = GST_BASE_PARSE_DRAINING (parse);
nonext = FALSE;
current_off = h265parse->current_off;
if (current_off < 0)
current_off = 0;
g_assert (current_off < size);
GST_DEBUG_OBJECT (h265parse, "last parse position %d", current_off);
/* check for initial skip */
if (h265parse->current_off == -1) {
pres =
gst_h265_parser_identify_nalu_unchecked (nalparser, data, current_off,
size, &nalu);
switch (pres) {
case GST_H265_PARSER_OK:
if (nalu.sc_offset > 0) {
*skipsize = nalu.sc_offset;
goto skip;
}
break;
case GST_H265_PARSER_NO_NAL:
*skipsize = size - 3;
goto skip;
break;
default:
g_assert_not_reached ();
break;
}
}
while (TRUE) {
pres =
gst_h265_parser_identify_nalu (nalparser, data, current_off, size,
&nalu);
switch (pres) {
case GST_H265_PARSER_OK:
GST_DEBUG_OBJECT (h265parse, "complete nal (offset, size): (%u, %u) ",
nalu.offset, nalu.size);
break;
case GST_H265_PARSER_NO_NAL_END:
GST_DEBUG_OBJECT (h265parse, "not a complete nal found at offset %u",
nalu.offset);
/* if draining, accept it as complete nal */
if (drain) {
nonext = TRUE;
nalu.size = size - nalu.offset;
GST_DEBUG_OBJECT (h265parse, "draining, accepting with size %u",
nalu.size);
/* if it's not too short at least */
if (nalu.size < 3)
goto broken;
break;
}
/* otherwise need more */
goto more;
case GST_H265_PARSER_BROKEN_LINK:
GST_ELEMENT_ERROR (h265parse, STREAM, FORMAT,
("Error parsing H.265 stream"),
("The link to structure needed for the parsing couldn't be found"));
goto invalid_stream;
case GST_H265_PARSER_ERROR:
/* should not really occur either */
GST_ELEMENT_ERROR (h265parse, STREAM, FORMAT,
("Error parsing H.265 stream"), ("Invalid H.265 stream"));
goto invalid_stream;
case GST_H265_PARSER_NO_NAL:
GST_ELEMENT_ERROR (h265parse, STREAM, FORMAT,
("Error parsing H.265 stream"), ("No H.265 NAL unit found"));
goto invalid_stream;
case GST_H265_PARSER_BROKEN_DATA:
GST_WARNING_OBJECT (h265parse, "input stream is corrupt; "
"it contains a NAL unit of length %u", nalu.size);
broken:
/* broken nal at start -> arrange to skip it,
* otherwise have it terminate current au
* (and so it will be skipped on next frame round) */
if (current_off == 0) {
GST_DEBUG_OBJECT (h265parse, "skipping broken nal");
*skipsize = nalu.offset;
goto skip;
} else {
GST_DEBUG_OBJECT (h265parse, "terminating au");
nalu.size = 0;
nalu.offset = nalu.sc_offset;
goto end;
}
break;
default:
g_assert_not_reached ();
break;
}
GST_DEBUG_OBJECT (h265parse, "%p complete nal found. Off: %u, Size: %u",
data, nalu.offset, nalu.size);
/* simulate no next nal if none needed */
nonext = nonext || (h265parse->align == GST_H265_PARSE_ALIGN_NAL);
if (!nonext) {
if (nalu.offset + nalu.size + 5 + 2 > size) {
GST_DEBUG_OBJECT (h265parse, "not enough data for next NALU");
if (drain) {
GST_DEBUG_OBJECT (h265parse, "but draining anyway");
nonext = TRUE;
} else {
goto more;
}
}
}
if (nalu.type == GST_H265_NAL_VPS ||
nalu.type == GST_H265_NAL_SPS ||
nalu.type == GST_H265_NAL_PPS ||
(h265parse->have_sps && h265parse->have_pps)) {
gst_h265_parse_process_nal (h265parse, &nalu);
} else {
GST_WARNING_OBJECT (h265parse,
"no SPS/PPS yet, nal Type: %d %s, Size: %u will be dropped",
nalu.type, _nal_name (nalu.type), nalu.size);
*skipsize = nalu.size;
goto skip;
}
if (nonext)
break;
/* if no next nal, we know it's complete here */
if (gst_h265_parse_collect_nal (h265parse, data, size, &nalu))
break;
GST_DEBUG_OBJECT (h265parse, "Looking for more");
current_off = nalu.offset + nalu.size;
}
end:
framesize = nalu.offset + nalu.size;
gst_buffer_unmap (buffer, &map);
gst_h265_parse_parse_frame (parse, frame);
return gst_base_parse_finish_frame (parse, frame, framesize);
more:
*skipsize = 0;
/* Restart parsing from here next time */
if (current_off > 0)
h265parse->current_off = current_off;
/* Fall-through. */
out:
gst_buffer_unmap (buffer, &map);
return GST_FLOW_OK;
skip:
GST_DEBUG_OBJECT (h265parse, "skipping %d", *skipsize);
gst_h265_parse_reset_frame (h265parse);
goto out;
invalid_stream:
gst_buffer_unmap (buffer, &map);
return GST_FLOW_ERROR;
}
/* byte together hevc codec data based on collected pps and sps so far */
static GstBuffer *
gst_h265_parse_make_codec_data (GstH265Parse * h265parse)
{
GstBuffer *buf, *nal;
gint i, j, k = 0;
guint vps_size = 0, sps_size = 0, pps_size = 0;
guint num_vps = 0, num_sps = 0, num_pps = 0;
gboolean found = FALSE;
GstMapInfo map;
guint8 *data;
gint nl;
guint8 num_arrays = 0;
GstH265SPS *sps = NULL;
guint16 min_spatial_segmentation_idc = 0;
GstH265ProfileTierLevel *pft;
/* only nal payload in stored nals */
/* Fixme: Current implementation is not embedding SEI in codec_data */
for (i = 0; i < GST_H265_MAX_VPS_COUNT; i++) {
if ((nal = h265parse->vps_nals[i])) {
num_vps++;
/* size bytes also count */
vps_size += gst_buffer_get_size (nal) + 2;
}
}
if (num_vps > 0)
num_arrays++;
for (i = 0; i < GST_H265_MAX_SPS_COUNT; i++) {
if ((nal = h265parse->sps_nals[i])) {
num_sps++;
/* size bytes also count */
sps_size += gst_buffer_get_size (nal) + 2;
found = TRUE;
}
}
if (num_sps > 0)
num_arrays++;
for (i = 0; i < GST_H265_MAX_PPS_COUNT; i++) {
if ((nal = h265parse->pps_nals[i])) {
num_pps++;
/* size bytes also count */
pps_size += gst_buffer_get_size (nal) + 2;
}
}
if (num_pps > 0)
num_arrays++;
GST_DEBUG_OBJECT (h265parse,
"constructing codec_data: num_vps =%d num_sps=%d, num_pps=%d", num_vps,
num_sps, num_pps);
if (!found)
return NULL;
buf =
gst_buffer_new_allocate (NULL,
23 + num_arrays + (3 * num_arrays) + vps_size + sps_size + pps_size,
NULL);
gst_buffer_map (buf, &map, GST_MAP_WRITE);
data = map.data;
memset (data, 0, map.size);
nl = h265parse->nal_length_size;
sps = h265parse->nalparser->last_sps;
if (!sps)
return NULL;
pft = &sps->profile_tier_level;
if (sps->vui_parameters_present_flag)
min_spatial_segmentation_idc = sps->vui_params.min_spatial_segmentation_idc;
/* HEVCDecoderConfigurationVersion = 1
* profile_space | tier_flat | profile_idc |
* profile_compatibility_flags | constraint_indicator_flags |
* level_idc */
data[0] = 1;
data[1] =
(pft->profile_space << 5) | (pft->tier_flag << 5) | pft->profile_idc;
for (i = 2; i < 6; i++) {
for (j = 7; j >= 0; j--) {
data[i] |= (pft->profile_compatibility_flag[k] << j);
k++;
}
}
data[6] |=
(pft->progressive_source_flag << 7) | (pft->interlaced_source_flag << 6) |
(pft->non_packed_constraint_flag << 5) | (pft->
frame_only_constraint_flag << 4);
data[12] = pft->level_idc;
/* min_spatial_segmentation_idc */
GST_WRITE_UINT16_BE (data + 13, min_spatial_segmentation_idc);
data[13] |= 0xf0;
data[15] = 0xfc; /* keeping parrallelismType as zero (unknown) */
data[16] = 0xfc | sps->chroma_format_idc;
data[17] = 0xf8 | sps->bit_depth_luma_minus8;
data[18] = 0xf8 | sps->bit_depth_chroma_minus8;
data[19] = 0x00; /* keep avgFrameRate as unspecified */
data[20] = 0x00; /* keep avgFrameRate as unspecified */
/* 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 */
data[21] =
0x00 | ((sps->max_sub_layers_minus1 +
1) << 3) | (sps->temporal_id_nesting_flag << 2) | (nl - 1);
GST_WRITE_UINT8 (data + 22, num_arrays); /* numOfArrays */
data += 23;
/* VPS */
if (num_vps > 0) {
/* array_completeness | reserved_zero bit | nal_unit_type */
data[0] = 0x00 | 0x20;
data++;
GST_WRITE_UINT16_BE (data, num_vps);
data += 2;
for (i = 0; i < num_vps; i++) {
if ((nal = h265parse->vps_nals[i])) {
gsize nal_size = gst_buffer_get_size (nal);
GST_WRITE_UINT16_BE (data, nal_size);
gst_buffer_extract (nal, 0, data + 2, nal_size);
data += 2 + nal_size;
}
}
}
/* SPS */
if (num_sps > 0) {
/* array_completeness | reserved_zero bit | nal_unit_type */
data[0] = 0x00 | 0x21;
data++;
GST_WRITE_UINT16_BE (data, num_sps);
data += 2;
for (i = 0; i < num_sps; i++) {
if ((nal = h265parse->sps_nals[i])) {
gsize nal_size = gst_buffer_get_size (nal);
GST_WRITE_UINT16_BE (data, nal_size);
gst_buffer_extract (nal, 0, data + 2, nal_size);
data += 2 + nal_size;
}
}
}
/* PPS */
if (num_pps > 0) {
/* array_completeness | reserved_zero bit | nal_unit_type */
data[0] = 0x00 | 0x22;
data++;
GST_WRITE_UINT16_BE (data, num_pps);
data += 2;
for (i = 0; i < num_pps; i++) {
if ((nal = h265parse->pps_nals[i])) {
gsize nal_size = gst_buffer_get_size (nal);
GST_WRITE_UINT16_BE (data, nal_size);
gst_buffer_extract (nal, 0, data + 2, nal_size);
data += 2 + nal_size;
}
}
}
gst_buffer_unmap (buf, &map);
return buf;
}
static void
gst_h265_parse_get_par (GstH265Parse * h265parse, gint * num, gint * den)
{
if (h265parse->upstream_par_n != -1 && h265parse->upstream_par_d != -1) {
*num = h265parse->upstream_par_n;
*den = h265parse->upstream_par_d;
} else {
*num = h265parse->parsed_par_n;
*den = h265parse->parsed_par_d;
}
}
static void
gst_h265_parse_update_src_caps (GstH265Parse * h265parse, GstCaps * caps)
{
GstH265SPS *sps;
GstCaps *sink_caps, *src_caps;
gboolean modified = FALSE;
GstBuffer *buf = NULL;
GstStructure *s = NULL;
if (G_UNLIKELY (!gst_pad_has_current_caps (GST_BASE_PARSE_SRC_PAD
(h265parse))))
modified = TRUE;
else if (G_UNLIKELY (!h265parse->update_caps))
return;
/* if this is being called from the first _setcaps call, caps on the sinkpad
* aren't set yet and so they need to be passed as an argument */
if (caps)
sink_caps = gst_caps_ref (caps);
else
sink_caps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (h265parse));
/* carry over input caps as much as possible; override with our own stuff */
if (!sink_caps)
sink_caps = gst_caps_new_empty_simple ("video/x-h265");
else
s = gst_caps_get_structure (sink_caps, 0);
sps = h265parse->nalparser->last_sps;
GST_DEBUG_OBJECT (h265parse, "sps: %p", sps);
/* only codec-data for nice-and-clean au aligned packetized hevc format */
if ((h265parse->format == GST_H265_PARSE_FORMAT_HVC1
|| h265parse->format == GST_H265_PARSE_FORMAT_HEV1)
&& h265parse->align == GST_H265_PARSE_ALIGN_AU) {
buf = gst_h265_parse_make_codec_data (h265parse);
if (buf && h265parse->codec_data) {
GstMapInfo map;
gst_buffer_map (buf, &map, GST_MAP_READ);
if (map.size != gst_buffer_get_size (h265parse->codec_data) ||
gst_buffer_memcmp (h265parse->codec_data, 0, map.data, map.size))
modified = TRUE;
gst_buffer_unmap (buf, &map);
} else {
if (!buf && h265parse->codec_data_in)
buf = gst_buffer_ref (h265parse->codec_data_in);
modified = TRUE;
}
}
caps = NULL;
if (G_UNLIKELY (!sps)) {
caps = gst_caps_copy (sink_caps);
} else {
h265parse->width = sps->width;
h265parse->height = sps->height;
modified = TRUE;
/* 0/1 is set as the default in the codec parser */
if (sps->vui_params.timing_info_present_flag &&
!(sps->fps_num == 0 && sps->fps_den == 1)) {
if (G_UNLIKELY (h265parse->fps_num != sps->fps_num
|| h265parse->fps_den != sps->fps_den)) {
GST_INFO_OBJECT (h265parse, "framerate changed %d/%d",
sps->fps_num, sps->fps_den);
h265parse->fps_num = sps->fps_num;
h265parse->fps_den = sps->fps_den;
modified = TRUE;
}
}
if (sps->vui_params.aspect_ratio_info_present_flag) {
if (G_UNLIKELY ((h265parse->parsed_par_n != sps->vui_params.par_n)
&& (h265parse->parsed_par_d != sps->vui_params.par_d))) {
h265parse->parsed_par_n = sps->vui_params.par_n;
h265parse->parsed_par_d = sps->vui_params.par_d;
GST_INFO_OBJECT (h265parse, "pixel aspect ratio has been changed %d/%d",
h265parse->parsed_par_n, h265parse->parsed_par_d);
modified = TRUE;
}
}
if (G_UNLIKELY (modified || h265parse->update_caps)) {
gint fps_num = h265parse->fps_num;
gint fps_den = h265parse->fps_den;
gint width, height;
GstClockTime latency;
caps = gst_caps_copy (sink_caps);
/* sps should give this but upstream overrides */
if (s && gst_structure_has_field (s, "width"))
gst_structure_get_int (s, "width", &width);
else
width = h265parse->width;
if (s && gst_structure_has_field (s, "height"))
gst_structure_get_int (s, "height", &height);
else
height = h265parse->height;
gst_caps_set_simple (caps, "width", G_TYPE_INT, width,
"height", G_TYPE_INT, height, NULL);
/* upstream overrides */
if (s && gst_structure_has_field (s, "framerate"))
gst_structure_get_fraction (s, "framerate", &fps_num, &fps_den);
/* but not necessarily or reliably this */
if (fps_num > 0 && fps_den > 0) {
GST_INFO_OBJECT (h265parse, "setting framerate in caps");
gst_caps_set_simple (caps, "framerate",
GST_TYPE_FRACTION, fps_num, fps_den, NULL);
gst_base_parse_set_frame_rate (GST_BASE_PARSE (h265parse),
fps_num, fps_den, 0, 0);
latency = gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
gst_base_parse_set_latency (GST_BASE_PARSE (h265parse), latency,
latency);
}
}
}
if (caps) {
gint par_n, par_d;
gst_caps_set_simple (caps, "parsed", G_TYPE_BOOLEAN, TRUE,
"stream-format", G_TYPE_STRING,
gst_h265_parse_get_string (h265parse, TRUE, h265parse->format),
"alignment", G_TYPE_STRING,
gst_h265_parse_get_string (h265parse, FALSE, h265parse->align), NULL);
gst_h265_parse_get_par (h265parse, &par_n, &par_d);
if (par_n != 0 && par_d != 0 &&
(!s || !gst_structure_has_field (s, "pixel-aspect-ratio"))) {
GST_INFO_OBJECT (h265parse, "PAR %d/%d", par_n, par_d);
gst_caps_set_simple (caps, "pixel-aspect-ratio", GST_TYPE_FRACTION,
par_n, par_d, NULL);
}
src_caps = gst_pad_get_current_caps (GST_BASE_PARSE_SRC_PAD (h265parse));
if (src_caps
&& gst_structure_has_field (gst_caps_get_structure (src_caps, 0),
"codec_data")) {
/* use codec data from old caps for comparison; we don't want to resend caps
if everything is same except codec data; */
gst_caps_set_value (caps, "codec_data",
gst_structure_get_value (gst_caps_get_structure (src_caps, 0),
"codec_data"));
}
if (!(src_caps && gst_caps_is_strictly_equal (src_caps, caps))) {
/* update codec data to new value */
if (buf) {
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, buf, NULL);
gst_buffer_replace (&h265parse->codec_data, buf);
gst_buffer_unref (buf);
buf = NULL;
} else {
GstStructure *s;
/* remove any left-over codec-data hanging around */
s = gst_caps_get_structure (caps, 0);
gst_structure_remove_field (s, "codec_data");
gst_buffer_replace (&h265parse->codec_data, NULL);
}
gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (h265parse), caps);
}
if (src_caps)
gst_caps_unref (src_caps);
gst_caps_unref (caps);
}
gst_caps_unref (sink_caps);
if (buf)
gst_buffer_unref (buf);
}
static GstFlowReturn
gst_h265_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
GstH265Parse *h265parse;
GstBuffer *buffer;
guint av;
h265parse = GST_H265_PARSE (parse);
buffer = frame->buffer;
gst_h265_parse_update_src_caps (h265parse, NULL);
/* Fixme: Implement timestamp interpolation based on SEI Messagses */
GST_FIXME_OBJECT (h265parse,
"Implement timestamp/duration interpolation based on SEI message");
if (h265parse->keyframe)
GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
else
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
/* replace with transformed HEVC output if applicable */
av = gst_adapter_available (h265parse->frame_out);
if (av) {
GstBuffer *buf;
buf = gst_adapter_take_buffer (h265parse->frame_out, av);
gst_buffer_copy_into (buf, buffer, GST_BUFFER_COPY_METADATA, 0, -1);
gst_buffer_replace (&frame->out_buffer, buf);
gst_buffer_unref (buf);
}
return GST_FLOW_OK;
}
/* sends a codec NAL downstream, decorating and transforming as needed.
* No ownership is taken of @nal */
static GstFlowReturn
gst_h265_parse_push_codec_buffer (GstH265Parse * h265parse, GstBuffer * nal,
GstClockTime ts)
{
GstMapInfo map;
gst_buffer_map (nal, &map, GST_MAP_READ);
nal = gst_h265_parse_wrap_nal (h265parse, h265parse->format,
map.data, map.size);
gst_buffer_unmap (nal, &map);
GST_BUFFER_TIMESTAMP (nal) = ts;
GST_BUFFER_DURATION (nal) = 0;
return gst_pad_push (GST_BASE_PARSE_SRC_PAD (h265parse), nal);
}
static GstEvent *
check_pending_key_unit_event (GstEvent * pending_event, GstSegment * segment,
GstClockTime timestamp, guint flags, GstClockTime pending_key_unit_ts)
{
GstClockTime running_time, stream_time;
gboolean all_headers;
guint count;
GstEvent *event = NULL;
g_return_val_if_fail (segment != NULL, NULL);
if (pending_event == NULL)
goto out;
if (GST_CLOCK_TIME_IS_VALID (pending_key_unit_ts) &&
timestamp == GST_CLOCK_TIME_NONE)
goto out;
running_time = gst_segment_to_running_time (segment,
GST_FORMAT_TIME, timestamp);
GST_INFO ("now %" GST_TIME_FORMAT " wanted %" GST_TIME_FORMAT,
GST_TIME_ARGS (running_time), GST_TIME_ARGS (pending_key_unit_ts));
if (GST_CLOCK_TIME_IS_VALID (pending_key_unit_ts) &&
running_time < pending_key_unit_ts)
goto out;
if (flags & GST_BUFFER_FLAG_DELTA_UNIT) {
GST_DEBUG ("pending force key unit, waiting for keyframe");
goto out;
}
stream_time = gst_segment_to_stream_time (segment,
GST_FORMAT_TIME, timestamp);
gst_video_event_parse_upstream_force_key_unit (pending_event,
NULL, &all_headers, &count);
event =
gst_video_event_new_downstream_force_key_unit (timestamp, stream_time,
running_time, all_headers, count);
gst_event_set_seqnum (event, gst_event_get_seqnum (pending_event));
out:
return event;
}
static void
gst_h265_parse_prepare_key_unit (GstH265Parse * parse, GstEvent * event)
{
GstClockTime running_time;
guint count;
#ifndef GST_DISABLE_GST_DEBUG
gboolean have_vps, have_sps, have_pps;
gint i;
#endif
parse->pending_key_unit_ts = GST_CLOCK_TIME_NONE;
gst_event_replace (&parse->force_key_unit_event, NULL);
gst_video_event_parse_downstream_force_key_unit (event,
NULL, NULL, &running_time, NULL, &count);
GST_INFO_OBJECT (parse, "pushing downstream force-key-unit event %d "
"%" GST_TIME_FORMAT " count %d", gst_event_get_seqnum (event),
GST_TIME_ARGS (running_time), count);
gst_pad_push_event (GST_BASE_PARSE_SRC_PAD (parse), event);
#ifndef GST_DISABLE_GST_DEBUG
have_vps = have_sps = have_pps = FALSE;
for (i = 0; i < GST_H265_MAX_VPS_COUNT; i++) {
if (parse->vps_nals[i] != NULL) {
have_vps = TRUE;
break;
}
}
for (i = 0; i < GST_H265_MAX_SPS_COUNT; i++) {
if (parse->sps_nals[i] != NULL) {
have_sps = TRUE;
break;
}
}
for (i = 0; i < GST_H265_MAX_PPS_COUNT; i++) {
if (parse->pps_nals[i] != NULL) {
have_pps = TRUE;
break;
}
}
GST_INFO_OBJECT (parse,
"preparing key unit, have vps %d have sps %d have pps %d", have_vps,
have_sps, have_pps);
#endif
/* set push_codec to TRUE so that pre_push_frame sends VPS/SPS/PPS again */
parse->push_codec = TRUE;
}
static GstFlowReturn
gst_h265_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
GstH265Parse *h265parse;
GstBuffer *buffer;
GstEvent *event;
h265parse = GST_H265_PARSE (parse);
if (!h265parse->sent_codec_tag) {
GstTagList *taglist;
GstCaps *caps;
taglist = gst_tag_list_new_empty ();
/* codec tag */
caps = gst_pad_get_current_caps (GST_BASE_PARSE_SRC_PAD (parse));
gst_pb_utils_add_codec_description_to_tag_list (taglist,
GST_TAG_VIDEO_CODEC, caps);
gst_caps_unref (caps);
gst_pad_push_event (GST_BASE_PARSE_SRC_PAD (h265parse),
gst_event_new_tag (taglist));
/* also signals the end of first-frame processing */
h265parse->sent_codec_tag = TRUE;
}
buffer = frame->buffer;
if ((event = check_pending_key_unit_event (h265parse->force_key_unit_event,
&parse->segment, GST_BUFFER_TIMESTAMP (buffer),
GST_BUFFER_FLAGS (buffer), h265parse->pending_key_unit_ts))) {
gst_h265_parse_prepare_key_unit (h265parse, event);
}
/* periodic VPS/SPS/PPS sending */
if (h265parse->interval > 0 || h265parse->push_codec) {
GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buffer);
guint64 diff;
/* init */
if (!GST_CLOCK_TIME_IS_VALID (h265parse->last_report)) {
h265parse->last_report = timestamp;
}
if (h265parse->idr_pos >= 0) {
GST_LOG_OBJECT (h265parse, "IDR nal at offset %d", h265parse->idr_pos);
if (timestamp > h265parse->last_report)
diff = timestamp - h265parse->last_report;
else
diff = 0;
GST_LOG_OBJECT (h265parse,
"now %" GST_TIME_FORMAT ", last VPS/SPS/PPS %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp), GST_TIME_ARGS (h265parse->last_report));
GST_DEBUG_OBJECT (h265parse,
"interval since last VPS/SPS/PPS %" GST_TIME_FORMAT,
GST_TIME_ARGS (diff));
if (GST_TIME_AS_SECONDS (diff) >= h265parse->interval ||
h265parse->push_codec) {
GstBuffer *codec_nal;
gint i;
GstClockTime new_ts;
/* avoid overwriting a perfectly fine timestamp */
new_ts = GST_CLOCK_TIME_IS_VALID (timestamp) ? timestamp :
h265parse->last_report;
if (h265parse->align == GST_H265_PARSE_ALIGN_NAL) {
/* send separate config NAL buffers */
GST_DEBUG_OBJECT (h265parse, "- sending VPS/SPS/PPS");
for (i = 0; i < GST_H265_MAX_VPS_COUNT; i++) {
if ((codec_nal = h265parse->vps_nals[i])) {
GST_DEBUG_OBJECT (h265parse, "sending VPS nal");
gst_h265_parse_push_codec_buffer (h265parse, codec_nal,
timestamp);
h265parse->last_report = new_ts;
}
}
for (i = 0; i < GST_H265_MAX_SPS_COUNT; i++) {
if ((codec_nal = h265parse->sps_nals[i])) {
GST_DEBUG_OBJECT (h265parse, "sending SPS nal");
gst_h265_parse_push_codec_buffer (h265parse, codec_nal,
timestamp);
h265parse->last_report = new_ts;
}
}
for (i = 0; i < GST_H265_MAX_PPS_COUNT; i++) {
if ((codec_nal = h265parse->pps_nals[i])) {
GST_DEBUG_OBJECT (h265parse, "sending PPS nal");
gst_h265_parse_push_codec_buffer (h265parse, codec_nal,
timestamp);
h265parse->last_report = new_ts;
}
}
} else {
/* insert config NALs into AU */
GstByteWriter bw;
GstBuffer *new_buf;
const gboolean bs = h265parse->format == GST_H265_PARSE_FORMAT_BYTE;
const gint nls = 4 - h265parse->nal_length_size;
gboolean ok;
gst_byte_writer_init_with_size (&bw, gst_buffer_get_size (buffer),
FALSE);
ok = gst_byte_writer_put_buffer (&bw, buffer, 0, h265parse->idr_pos);
GST_DEBUG_OBJECT (h265parse, "- inserting VPS/SPS/PPS");
for (i = 0; i < GST_H265_MAX_VPS_COUNT; i++) {
if ((codec_nal = h265parse->vps_nals[i])) {
gsize nal_size = gst_buffer_get_size (codec_nal);
GST_DEBUG_OBJECT (h265parse, "inserting VPS nal");
if (bs) {
ok &= gst_byte_writer_put_uint32_be (&bw, 1);
} else {
ok &= gst_byte_writer_put_uint32_be (&bw,
(nal_size << (nls * 8)));
ok &= gst_byte_writer_set_pos (&bw,
gst_byte_writer_get_pos (&bw) - nls);
}
ok &= gst_byte_writer_put_buffer (&bw, codec_nal, 0, nal_size);
h265parse->last_report = new_ts;
}
}
for (i = 0; i < GST_H265_MAX_SPS_COUNT; i++) {
if ((codec_nal = h265parse->sps_nals[i])) {
gsize nal_size = gst_buffer_get_size (codec_nal);
GST_DEBUG_OBJECT (h265parse, "inserting SPS nal");
if (bs) {
ok &= gst_byte_writer_put_uint32_be (&bw, 1);
} else {
ok &= gst_byte_writer_put_uint32_be (&bw,
(nal_size << (nls * 8)));
ok &= gst_byte_writer_set_pos (&bw,
gst_byte_writer_get_pos (&bw) - nls);
}
ok &= gst_byte_writer_put_buffer (&bw, codec_nal, 0, nal_size);
h265parse->last_report = new_ts;
}
}
for (i = 0; i < GST_H265_MAX_PPS_COUNT; i++) {
if ((codec_nal = h265parse->pps_nals[i])) {
gsize nal_size = gst_buffer_get_size (codec_nal);
GST_DEBUG_OBJECT (h265parse, "inserting PPS nal");
if (bs) {
ok &= gst_byte_writer_put_uint32_be (&bw, 1);
} else {
ok &= gst_byte_writer_put_uint32_be (&bw,
(nal_size << (nls * 8)));
ok &= gst_byte_writer_set_pos (&bw,
gst_byte_writer_get_pos (&bw) - nls);
}
ok &= gst_byte_writer_put_buffer (&bw, codec_nal, 0, nal_size);
h265parse->last_report = new_ts;
}
}
ok &=
gst_byte_writer_put_buffer (&bw, buffer, h265parse->idr_pos, -1);
/* collect result and push */
new_buf = gst_byte_writer_reset_and_get_buffer (&bw);
gst_buffer_copy_into (new_buf, buffer, GST_BUFFER_COPY_METADATA, 0,
-1);
/* should already be keyframe/IDR, but it may not have been,
* so mark it as such to avoid being discarded by picky decoder */
GST_BUFFER_FLAG_UNSET (new_buf, GST_BUFFER_FLAG_DELTA_UNIT);
gst_buffer_replace (&frame->out_buffer, new_buf);
gst_buffer_unref (new_buf);
/* some result checking seems to make some compilers happy */
if (G_UNLIKELY (!ok)) {
GST_ERROR_OBJECT (h265parse, "failed to insert SPS/PPS");
}
}
}
/* we pushed whatever we had */
h265parse->push_codec = FALSE;
h265parse->have_vps = FALSE;
h265parse->have_sps = FALSE;
h265parse->have_pps = FALSE;
}
}
gst_h265_parse_reset_frame (h265parse);
return GST_FLOW_OK;
}
static gboolean
gst_h265_parse_set_caps (GstBaseParse * parse, GstCaps * caps)
{
GstH265Parse *h265parse;
GstStructure *str;
const GValue *value;
GstBuffer *codec_data = NULL;
gsize off, size;
guint format, align;
guint num_nals, i, j;
GstH265NalUnit nalu;
GstH265ParserResult parseres;
h265parse = GST_H265_PARSE (parse);
/* reset */
h265parse->push_codec = FALSE;
str = gst_caps_get_structure (caps, 0);
/* accept upstream info if provided */
gst_structure_get_int (str, "width", &h265parse->width);
gst_structure_get_int (str, "height", &h265parse->height);
gst_structure_get_fraction (str, "framerate", &h265parse->fps_num,
&h265parse->fps_den);
gst_structure_get_fraction (str, "pixel-aspect-ratio",
&h265parse->upstream_par_n, &h265parse->upstream_par_d);
/* get upstream format and align from caps */
gst_h265_parse_format_from_caps (caps, &format, &align);
/* packetized video has a codec_data */
if (format != GST_H265_PARSE_FORMAT_BYTE &&
(value = gst_structure_get_value (str, "codec_data"))) {
GstMapInfo map;
guint8 *data;
GST_DEBUG_OBJECT (h265parse, "have packetized h265");
/* make note for optional split processing */
h265parse->packetized = TRUE;
codec_data = gst_value_get_buffer (value);
if (!codec_data)
goto wrong_type;
gst_buffer_map (codec_data, &map, GST_MAP_READ);
data = map.data;
size = map.size;
/* parse the hvcC data */
if (size < 28) {
gst_buffer_unmap (codec_data, &map);
goto hvcc_too_small;
}
/* parse the version, this must be one but
* is zero until the spec is finalized */
if (data[0] != 0 && data[0] != 1) {
gst_buffer_unmap (codec_data, &map);
goto wrong_version;
}
h265parse->nal_length_size = (data[21] & 0x03) + 1;
GST_DEBUG_OBJECT (h265parse, "nal length size %u",
h265parse->nal_length_size);
off = 23;
for (i = 0; i < data[22]; i++) {
num_nals = GST_READ_UINT16_BE (data + off + 1);
for (j = 0; j < num_nals; j++) {
parseres = gst_h265_parser_identify_nalu_hevc (h265parse->nalparser,
data, off + 3, size, 2, &nalu);
if (parseres != GST_H265_PARSER_OK) {
gst_buffer_unmap (codec_data, &map);
goto hvcc_too_small;
}
gst_h265_parse_process_nal (h265parse, &nalu);
off = nalu.offset + nalu.size;
}
}
} else {
GST_DEBUG_OBJECT (h265parse, "have bytestream h265");
/* nothing to pre-process */
h265parse->packetized = FALSE;
/* we have 4 sync bytes */
h265parse->nal_length_size = 4;
if (format == GST_H265_PARSE_FORMAT_NONE) {
format = GST_H265_PARSE_FORMAT_BYTE;
align = GST_H265_PARSE_ALIGN_AU;
}
}
{
GstCaps *in_caps;
/* prefer input type determined above */
in_caps = gst_caps_new_simple ("video/x-h265",
"parsed", G_TYPE_BOOLEAN, TRUE,
"stream-format", G_TYPE_STRING,
gst_h265_parse_get_string (h265parse, TRUE, format),
"alignment", G_TYPE_STRING,
gst_h265_parse_get_string (h265parse, FALSE, align), NULL);
/* negotiate with downstream, sets ->format and ->align */
gst_h265_parse_negotiate (h265parse, format, in_caps);
gst_caps_unref (in_caps);
}
if (format == h265parse->format && align == h265parse->align) {
/* do not set CAPS and passthrough mode if VPS/SPS/PPS have not been parsed */
if (h265parse->have_vps && h265parse->have_sps && h265parse->have_pps) {
gst_base_parse_set_passthrough (parse, TRUE);
/* we did parse codec-data and might supplement src caps */
gst_h265_parse_update_src_caps (h265parse, caps);
}
} else if (format == GST_H265_PARSE_FORMAT_HVC1
|| format == GST_H265_PARSE_FORMAT_HEV1) {
/* if input != output, and input is hevc, must split before anything else */
/* arrange to insert codec-data in-stream if needed.
* src caps are only arranged for later on */
h265parse->push_codec = TRUE;
h265parse->have_vps = FALSE;
h265parse->have_sps = FALSE;
h265parse->have_pps = FALSE;
if (h265parse->align == GST_H265_PARSE_ALIGN_NAL)
h265parse->split_packetized = TRUE;
h265parse->packetized = TRUE;
}
return TRUE;
/* ERRORS */
hvcc_too_small:
{
GST_DEBUG_OBJECT (h265parse, "hvcC size %" G_GSIZE_FORMAT " < 8", size);
goto refuse_caps;
}
wrong_version:
{
GST_DEBUG_OBJECT (h265parse, "wrong hvcC version");
goto refuse_caps;
}
wrong_type:
{
GST_DEBUG_OBJECT (h265parse, "wrong codec-data type");
goto refuse_caps;
}
refuse_caps:
{
GST_WARNING_OBJECT (h265parse, "refused caps %" GST_PTR_FORMAT, caps);
return FALSE;
}
}
static void
remove_fields (GstCaps * caps)
{
guint i, n;
n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
GstStructure *s = gst_caps_get_structure (caps, i);
gst_structure_remove_field (s, "alignment");
gst_structure_remove_field (s, "stream-format");
gst_structure_remove_field (s, "parsed");
}
}
static GstCaps *
gst_h265_parse_get_caps (GstBaseParse * parse, GstCaps * filter)
{
GstCaps *peercaps, *templ;
GstCaps *res;
templ = gst_pad_get_pad_template_caps (GST_BASE_PARSE_SINK_PAD (parse));
if (filter) {
GstCaps *fcopy = gst_caps_copy (filter);
/* Remove the fields we convert */
remove_fields (fcopy);
peercaps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), fcopy);
gst_caps_unref (fcopy);
} else
peercaps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), NULL);
if (peercaps) {
peercaps = gst_caps_make_writable (peercaps);
remove_fields (peercaps);
res = gst_caps_intersect_full (peercaps, templ, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (peercaps);
gst_caps_unref (templ);
} else {
res = templ;
}
if (filter) {
GstCaps *tmp = gst_caps_intersect_full (res, filter,
GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (res);
res = tmp;
}
return res;
}
static gboolean
gst_h265_parse_event (GstBaseParse * parse, GstEvent * event)
{
gboolean res;
GstH265Parse *h265parse = GST_H265_PARSE (parse);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CUSTOM_DOWNSTREAM:
{
GstClockTime timestamp, stream_time, running_time;
gboolean all_headers;
guint count;
if (gst_video_event_is_force_key_unit (event)) {
gst_video_event_parse_downstream_force_key_unit (event,
&timestamp, &stream_time, &running_time, &all_headers, &count);
GST_INFO_OBJECT (h265parse, "received downstream force key unit event, "
"seqnum %d running_time %" GST_TIME_FORMAT
" all_headers %d count %d", gst_event_get_seqnum (event),
GST_TIME_ARGS (running_time), all_headers, count);
if (h265parse->force_key_unit_event) {
GST_INFO_OBJECT (h265parse, "ignoring force key unit event "
"as one is already queued");
} else {
h265parse->pending_key_unit_ts = running_time;
gst_event_replace (&h265parse->force_key_unit_event, event);
}
gst_event_unref (event);
res = TRUE;
} else {
res = GST_BASE_PARSE_CLASS (parent_class)->sink_event (parse, event);
break;
}
break;
}
case GST_EVENT_FLUSH_STOP:
res = GST_BASE_PARSE_CLASS (parent_class)->sink_event (parse, event);
break;
case GST_EVENT_SEGMENT:
{
res = GST_BASE_PARSE_CLASS (parent_class)->sink_event (parse, event);
break;
}
default:
res = GST_BASE_PARSE_CLASS (parent_class)->sink_event (parse, event);
break;
}
return res;
}
static gboolean
gst_h265_parse_src_event (GstBaseParse * parse, GstEvent * event)
{
gboolean res;
GstH265Parse *h265parse = GST_H265_PARSE (parse);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CUSTOM_UPSTREAM:
{
GstClockTime running_time;
gboolean all_headers;
guint count;
if (gst_video_event_is_force_key_unit (event)) {
gst_video_event_parse_upstream_force_key_unit (event,
&running_time, &all_headers, &count);
GST_INFO_OBJECT (h265parse, "received upstream force-key-unit event, "
"seqnum %d running_time %" GST_TIME_FORMAT
" all_headers %d count %d", gst_event_get_seqnum (event),
GST_TIME_ARGS (running_time), all_headers, count);
if (all_headers) {
h265parse->pending_key_unit_ts = running_time;
gst_event_replace (&h265parse->force_key_unit_event, event);
}
}
res = GST_BASE_PARSE_CLASS (parent_class)->src_event (parse, event);
break;
}
default:
res = GST_BASE_PARSE_CLASS (parent_class)->src_event (parse, event);
break;
}
return res;
}
static void
gst_h265_parse_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstH265Parse *parse;
parse = GST_H265_PARSE (object);
switch (prop_id) {
case PROP_CONFIG_INTERVAL:
parse->interval = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_h265_parse_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstH265Parse *parse;
parse = GST_H265_PARSE (object);
switch (prop_id) {
case PROP_CONFIG_INTERVAL:
g_value_set_uint (value, parse->interval);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
Reference in a new issue View git blame Copy permalink