gstrtph265depay.c 52.1 KB
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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 <stdio.h>
#include <string.h>

#include <gst/base/gstbitreader.h>
#include <gst/rtp/gstrtpbuffer.h>
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#include <gst/video/video.h>
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#include "gstrtph265depay.h"
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#include "gstrtputils.h"
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GST_DEBUG_CATEGORY_STATIC (rtph265depay_debug);
#define GST_CAT_DEFAULT (rtph265depay_debug)

/* This is what we'll default to when downstream hasn't
 * expressed a restriction or preference via caps */
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#define DEFAULT_STREAM_FORMAT GST_H265_STREAM_FORMAT_BYTESTREAM
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#define DEFAULT_ACCESS_UNIT   FALSE

/* 3 zero bytes syncword */
static const guint8 sync_bytes[] = { 0, 0, 0, 1 };

static GstStaticPadTemplate gst_rtp_h265_depay_src_template =
    GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
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    GST_STATIC_CAPS
    ("video/x-h265, stream-format=(string)hvc1, alignment=(string)au; "
        /* FIXME: hev1 format is not supported yet */
        /* "video/x-h265, "
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           "stream-format = (string) hev1, alignment = (string) au; " */
        "video/x-h265, "
        "stream-format = (string) byte-stream, alignment = (string) { nal, au }")
    );

static GstStaticPadTemplate gst_rtp_h265_depay_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("application/x-rtp, "
        "media = (string) \"video\", "
        "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 gst_rtp_h265_depay_parent_class parent_class
G_DEFINE_TYPE (GstRtpH265Depay, gst_rtp_h265_depay,
    GST_TYPE_RTP_BASE_DEPAYLOAD);

static void gst_rtp_h265_depay_finalize (GObject * object);

static GstStateChangeReturn gst_rtp_h265_depay_change_state (GstElement *
    element, GstStateChange transition);

static GstBuffer *gst_rtp_h265_depay_process (GstRTPBaseDepayload * depayload,
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    GstRTPBuffer * rtp);
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static gboolean gst_rtp_h265_depay_setcaps (GstRTPBaseDepayload * filter,
    GstCaps * caps);
static gboolean gst_rtp_h265_depay_handle_event (GstRTPBaseDepayload * depay,
    GstEvent * event);

static void
gst_rtp_h265_depay_class_init (GstRtpH265DepayClass * klass)
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;
  GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;

  gobject_class = (GObjectClass *) klass;
  gstelement_class = (GstElementClass *) klass;
  gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;

  gobject_class->finalize = gst_rtp_h265_depay_finalize;

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  gst_element_class_add_static_pad_template (gstelement_class,
      &gst_rtp_h265_depay_src_template);
  gst_element_class_add_static_pad_template (gstelement_class,
      &gst_rtp_h265_depay_sink_template);
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  gst_element_class_set_static_metadata (gstelement_class,
      "RTP H265 depayloader", "Codec/Depayloader/Network/RTP",
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      "Extracts H265 video from RTP packets (RFC 7798)",
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      "Jurgen Slowack <jurgenslowack@gmail.com>");
  gstelement_class->change_state = gst_rtp_h265_depay_change_state;

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  gstrtpbasedepayload_class->process_rtp_packet = gst_rtp_h265_depay_process;
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  gstrtpbasedepayload_class->set_caps = gst_rtp_h265_depay_setcaps;
  gstrtpbasedepayload_class->handle_event = gst_rtp_h265_depay_handle_event;
}

static void
gst_rtp_h265_depay_init (GstRtpH265Depay * rtph265depay)
{
  rtph265depay->adapter = gst_adapter_new ();
  rtph265depay->picture_adapter = gst_adapter_new ();
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  rtph265depay->output_format = DEFAULT_STREAM_FORMAT;
  rtph265depay->byte_stream =
      (DEFAULT_STREAM_FORMAT == GST_H265_STREAM_FORMAT_BYTESTREAM);
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  rtph265depay->stream_format = NULL;
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  rtph265depay->merge = DEFAULT_ACCESS_UNIT;
  rtph265depay->vps = g_ptr_array_new_with_free_func (
      (GDestroyNotify) gst_buffer_unref);
  rtph265depay->sps = g_ptr_array_new_with_free_func (
      (GDestroyNotify) gst_buffer_unref);
  rtph265depay->pps = g_ptr_array_new_with_free_func (
      (GDestroyNotify) gst_buffer_unref);
}

static void
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gst_rtp_h265_depay_reset (GstRtpH265Depay * rtph265depay, gboolean hard)
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{
  gst_adapter_clear (rtph265depay->adapter);
  rtph265depay->wait_start = TRUE;
  gst_adapter_clear (rtph265depay->picture_adapter);
  rtph265depay->picture_start = FALSE;
  rtph265depay->last_keyframe = FALSE;
  rtph265depay->last_ts = 0;
  rtph265depay->current_fu_type = 0;
  rtph265depay->new_codec_data = FALSE;
  g_ptr_array_set_size (rtph265depay->vps, 0);
  g_ptr_array_set_size (rtph265depay->sps, 0);
  g_ptr_array_set_size (rtph265depay->pps, 0);
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  if (hard) {
    if (rtph265depay->allocator != NULL) {
      gst_object_unref (rtph265depay->allocator);
      rtph265depay->allocator = NULL;
    }
    gst_allocation_params_init (&rtph265depay->params);
  }
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}

static void
gst_rtp_h265_depay_finalize (GObject * object)
{
  GstRtpH265Depay *rtph265depay;

  rtph265depay = GST_RTP_H265_DEPAY (object);

  if (rtph265depay->codec_data)
    gst_buffer_unref (rtph265depay->codec_data);

  g_object_unref (rtph265depay->adapter);
  g_object_unref (rtph265depay->picture_adapter);

  g_ptr_array_free (rtph265depay->vps, TRUE);
  g_ptr_array_free (rtph265depay->sps, TRUE);
  g_ptr_array_free (rtph265depay->pps, TRUE);

  G_OBJECT_CLASS (parent_class)->finalize (object);
}

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static inline const gchar *
stream_format_get_nick (GstH265StreamFormat fmt)
{
  switch (fmt) {
    case GST_H265_STREAM_FORMAT_BYTESTREAM:
      return "byte-stream";
    case GST_H265_STREAM_FORMAT_HVC1:
      return "hvc1";
    case GST_H265_STREAM_FORMAT_HEV1:
      return "hev1";
    default:
      break;
  }
  return "unknown";
}

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static void
gst_rtp_h265_depay_negotiate (GstRtpH265Depay * rtph265depay)
{
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  GstH265StreamFormat stream_format = GST_H265_STREAM_FORMAT_UNKNOWN;
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  GstCaps *caps;
  gint merge = -1;

  caps =
      gst_pad_get_allowed_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (rtph265depay));

  GST_DEBUG_OBJECT (rtph265depay, "allowed caps: %" GST_PTR_FORMAT, caps);

  if (caps) {
    if (gst_caps_get_size (caps) > 0) {
      GstStructure *s = gst_caps_get_structure (caps, 0);
      const gchar *str = NULL;

      if ((str = gst_structure_get_string (s, "stream-format"))) {
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        rtph265depay->stream_format = g_intern_string (str);
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        if (strcmp (str, "hev1") == 0) {
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          stream_format = GST_H265_STREAM_FORMAT_HEV1;
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        } else if (strcmp (str, "hvc1") == 0) {
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          stream_format = GST_H265_STREAM_FORMAT_HVC1;
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        } else if (strcmp (str, "byte-stream") == 0) {
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          stream_format = GST_H265_STREAM_FORMAT_BYTESTREAM;
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        } else {
          GST_DEBUG_OBJECT (rtph265depay, "unknown stream-format: %s", str);
        }
      }

      if ((str = gst_structure_get_string (s, "alignment"))) {
        if (strcmp (str, "au") == 0) {
          merge = TRUE;
        } else if (strcmp (str, "nal") == 0) {
          merge = FALSE;
        } else {
          GST_DEBUG_OBJECT (rtph265depay, "unknown alignment: %s", str);
        }
      }
    }
    gst_caps_unref (caps);
  }

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  if (stream_format != GST_H265_STREAM_FORMAT_UNKNOWN) {
    GST_DEBUG_OBJECT (rtph265depay, "downstream wants stream-format %s",
        stream_format_get_nick (stream_format));
    rtph265depay->output_format = stream_format;
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  } else {
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    GST_DEBUG_OBJECT (rtph265depay, "defaulting to output stream-format %s",
        stream_format_get_nick (DEFAULT_STREAM_FORMAT));
    rtph265depay->stream_format =
        stream_format_get_nick (DEFAULT_STREAM_FORMAT);
    rtph265depay->output_format = DEFAULT_STREAM_FORMAT;
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  }
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  rtph265depay->byte_stream =
      (rtph265depay->output_format == GST_H265_STREAM_FORMAT_BYTESTREAM);

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  if (merge != -1) {
    GST_DEBUG_OBJECT (rtph265depay, "downstream requires merge %d", merge);
    rtph265depay->merge = merge;
  } else {
    GST_DEBUG_OBJECT (rtph265depay, "defaulting to merge %d",
        DEFAULT_ACCESS_UNIT);
    rtph265depay->merge = DEFAULT_ACCESS_UNIT;
  }
}

static gboolean
parse_sps (GstMapInfo * map, guint32 * sps_id)
{                               /* To parse seq_parameter_set_id */
  GstBitReader br = GST_BIT_READER_INIT (map->data + 15,
      map->size - 15);

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  GST_MEMDUMP ("SPS", map->data, map->size);

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  if (map->size < 16)
    return FALSE;

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  if (!gst_rtp_read_golomb (&br, sps_id))
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    return FALSE;

  return TRUE;
}

static gboolean
parse_pps (GstMapInfo * map, guint32 * sps_id, guint32 * pps_id)
{                               /* To parse picture_parameter_set_id */
  GstBitReader br = GST_BIT_READER_INIT (map->data + 2,
      map->size - 2);

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  GST_MEMDUMP ("PPS", map->data, map->size);

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  if (map->size < 3)
    return FALSE;

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  if (!gst_rtp_read_golomb (&br, pps_id))
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    return FALSE;
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  if (!gst_rtp_read_golomb (&br, sps_id))
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    return FALSE;

  return TRUE;
}

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static gboolean
gst_rtp_h265_depay_set_output_caps (GstRtpH265Depay * rtph265depay,
    GstCaps * caps)
{
  GstAllocationParams params;
  GstAllocator *allocator = NULL;
  GstPad *srcpad;
  gboolean res;

  gst_allocation_params_init (&params);

  srcpad = GST_RTP_BASE_DEPAYLOAD_SRCPAD (rtph265depay);

  res = gst_pad_set_caps (srcpad, caps);

  if (res) {
    GstQuery *query;

    query = gst_query_new_allocation (caps, TRUE);
    if (!gst_pad_peer_query (srcpad, query)) {
      GST_DEBUG_OBJECT (rtph265depay, "downstream ALLOCATION query failed");
    }

    if (gst_query_get_n_allocation_params (query) > 0) {
      gst_query_parse_nth_allocation_param (query, 0, &allocator, &params);
    }

    gst_query_unref (query);
  }

  if (rtph265depay->allocator)
    gst_object_unref (rtph265depay->allocator);

  rtph265depay->allocator = allocator;
  rtph265depay->params = params;

  return res;
}
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static gboolean
gst_rtp_h265_set_src_caps (GstRtpH265Depay * rtph265depay)
{
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  gboolean res, update_caps;
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  GstCaps *old_caps;
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  GstCaps *srccaps;
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  GstPad *srcpad;
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  if (!rtph265depay->byte_stream &&
      (!rtph265depay->new_codec_data ||
          rtph265depay->vps->len == 0 || rtph265depay->sps->len == 0
          || rtph265depay->pps->len == 0))
    return TRUE;

  srccaps = gst_caps_new_simple ("video/x-h265",
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      "stream-format", G_TYPE_STRING, rtph265depay->stream_format,
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      "alignment", G_TYPE_STRING, rtph265depay->merge ? "au" : "nal", NULL);

  if (!rtph265depay->byte_stream) {
    GstBuffer *codec_data;
    gint i = 0;
    gint len;
    guint num_vps = rtph265depay->vps->len;
    guint num_sps = rtph265depay->sps->len;
    guint num_pps = rtph265depay->pps->len;
    GstMapInfo map, nalmap;
    guint8 *data;
    guint8 num_arrays = 0;
    guint new_size;
    GstBitReader br;
    guint32 tmp;
    guint8 tmp8 = 0;
    guint32 max_sub_layers_minus1, temporal_id_nesting_flag, chroma_format_idc,
        bit_depth_luma_minus8, bit_depth_chroma_minus8,
        min_spatial_segmentation_idc;

    /* Fixme: Current implementation is not embedding SEI in codec_data */

    if (num_sps == 0)
      return FALSE;

    /* start with 23 bytes header */
    len = 23;

    num_arrays = (num_vps > 0) + (num_sps > 0) + (num_pps > 0);
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    len += 3 * num_arrays;
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    /* add size of vps, sps & pps */
    for (i = 0; i < num_vps; i++)
      len += 2 + gst_buffer_get_size (g_ptr_array_index (rtph265depay->vps, i));
    for (i = 0; i < num_sps; i++)
      len += 2 + gst_buffer_get_size (g_ptr_array_index (rtph265depay->sps, i));
    for (i = 0; i < num_pps; i++)
      len += 2 + gst_buffer_get_size (g_ptr_array_index (rtph265depay->pps, i));

    GST_DEBUG_OBJECT (rtph265depay,
        "constructing codec_data: num_vps =%d num_sps=%d, num_pps=%d", num_vps,
        num_sps, num_pps);

    codec_data = gst_buffer_new_and_alloc (len);
    gst_buffer_map (codec_data, &map, GST_MAP_READWRITE);
    data = map.data;

    memset (data, 0, map.size);

    /* Parsing sps to get the info required further on */

    gst_buffer_map (g_ptr_array_index (rtph265depay->sps, 0), &nalmap,
        GST_MAP_READ);

    max_sub_layers_minus1 = ((nalmap.data[2]) >> 1) & 0x07;
    temporal_id_nesting_flag = nalmap.data[2] & 0x01;

    gst_bit_reader_init (&br, nalmap.data + 15, nalmap.size - 15);

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    gst_rtp_read_golomb (&br, &tmp);    /* sps_seq_parameter_set_id */
    gst_rtp_read_golomb (&br, &chroma_format_idc);      /* chroma_format_idc */
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    if (chroma_format_idc == 3)

      gst_bit_reader_get_bits_uint8 (&br, &tmp8, 1);    /* separate_colour_plane_flag */

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    gst_rtp_read_golomb (&br, &tmp);    /* pic_width_in_luma_samples */
    gst_rtp_read_golomb (&br, &tmp);    /* pic_height_in_luma_samples */
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    gst_bit_reader_get_bits_uint8 (&br, &tmp8, 1);      /* conformance_window_flag */
    if (tmp8) {
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      gst_rtp_read_golomb (&br, &tmp);  /* conf_win_left_offset */
      gst_rtp_read_golomb (&br, &tmp);  /* conf_win_right_offset */
      gst_rtp_read_golomb (&br, &tmp);  /* conf_win_top_offset */
      gst_rtp_read_golomb (&br, &tmp);  /* conf_win_bottom_offset */
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    }

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    gst_rtp_read_golomb (&br, &bit_depth_luma_minus8);  /* bit_depth_luma_minus8 */
    gst_rtp_read_golomb (&br, &bit_depth_chroma_minus8);        /* bit_depth_chroma_minus8 */
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    GST_DEBUG_OBJECT (rtph265depay,
        "Ignoring min_spatial_segmentation for now (assuming zero)");

    min_spatial_segmentation_idc = 0;   /* NOTE - we ignore this for now, but in a perfect world, we should continue parsing to obtain the real value */

    gst_buffer_unmap (g_ptr_array_index (rtph265depay->sps, 0), &nalmap);

    /* HEVCDecoderConfigurationVersion = 1 */
    data[0] = 1;

    /* Copy from profile_tier_level (Rec. ITU-T H.265 (04/2013) section 7.3.3
     *
     * profile_space | tier_flat | profile_idc |
     * profile_compatibility_flags | constraint_indicator_flags |
     * level_idc | progressive_source_flag | interlaced_source_flag
     * non_packed_constraint_flag | frame_only_constraint_flag
     * reserved_zero_44bits | level_idc */
    gst_buffer_map (g_ptr_array_index (rtph265depay->sps, 0), &nalmap,
        GST_MAP_READ);
    for (i = 0; i < 12; i++)
      data[i + 1] = nalmap.data[i];
    gst_buffer_unmap (g_ptr_array_index (rtph265depay->sps, 0), &nalmap);

    /* 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 | chroma_format_idc;
    data[17] = 0xf8 | bit_depth_luma_minus8;
    data[18] = 0xf8 | 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 */
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    /* we always output NALs with 4-byte nal unit length markers (or sync code) */
    data[21] = rtph265depay->byte_stream ? 0x00 : 0x03;
    data[21] |= ((max_sub_layers_minus1 + 1) << 3);
    data[21] |= (temporal_id_nesting_flag << 2);
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    GST_WRITE_UINT8 (data + 22, num_arrays);    /* numOfArrays */

    data += 23;

    /* copy all 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++) {
        gsize nal_size =
            gst_buffer_get_size (g_ptr_array_index (rtph265depay->vps, i));
        GST_WRITE_UINT16_BE (data, nal_size);
        gst_buffer_extract (g_ptr_array_index (rtph265depay->vps, i), 0,
            data + 2, nal_size);
        data += 2 + nal_size;
        GST_DEBUG_OBJECT (rtph265depay, "Copied VPS %d of length %u", i,
            (guint) nal_size);
      }
    }

    /* copy all 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++) {
        gsize nal_size =
            gst_buffer_get_size (g_ptr_array_index (rtph265depay->sps, i));
        GST_WRITE_UINT16_BE (data, nal_size);
        gst_buffer_extract (g_ptr_array_index (rtph265depay->sps, i), 0,
            data + 2, nal_size);
        data += 2 + nal_size;
        GST_DEBUG_OBJECT (rtph265depay, "Copied SPS %d of length %u", i,
            (guint) nal_size);
      }
    }

    /* copy all 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++) {
        gsize nal_size =
            gst_buffer_get_size (g_ptr_array_index (rtph265depay->pps, i));
        GST_WRITE_UINT16_BE (data, nal_size);
        gst_buffer_extract (g_ptr_array_index (rtph265depay->pps, i), 0,
            data + 2, nal_size);
        data += 2 + nal_size;
        GST_DEBUG_OBJECT (rtph265depay, "Copied PPS %d of length %u", i,
            (guint) nal_size);
      }
    }

    new_size = data - map.data;
    gst_buffer_unmap (codec_data, &map);
    gst_buffer_set_size (codec_data, new_size);

    gst_caps_set_simple (srccaps,
        "codec_data", GST_TYPE_BUFFER, codec_data, NULL);
    gst_buffer_unref (codec_data);
  }

575 576 577
  srcpad = GST_RTP_BASE_DEPAYLOAD_SRCPAD (rtph265depay);

  old_caps = gst_pad_get_current_caps (srcpad);
578
  if (old_caps != NULL) {
579 580 581 582 583 584 585

    /* Only update the caps if they are not equal. For
     * AVC we don't update caps if only the codec_data
     * changes. This is the same behaviour as in h264parse
     * and gstrtph264depay
     */
    if (rtph265depay->byte_stream) {
586
      update_caps = !gst_caps_is_equal (srccaps, old_caps);
587 588 589 590 591 592 593 594 595 596
    } else {
      GstCaps *tmp_caps = gst_caps_copy (srccaps);
      GstStructure *old_s, *tmp_s;

      old_s = gst_caps_get_structure (old_caps, 0);
      tmp_s = gst_caps_get_structure (tmp_caps, 0);
      if (gst_structure_has_field (old_s, "codec_data"))
        gst_structure_set_value (tmp_s, "codec_data",
            gst_structure_get_value (old_s, "codec_data"));

597
      update_caps = !gst_caps_is_equal (old_caps, tmp_caps);
598 599
      gst_caps_unref (tmp_caps);
    }
600
    gst_caps_unref (old_caps);
601
  } else {
602 603 604 605
    update_caps = TRUE;
  }

  if (update_caps) {
606
    res = gst_rtp_h265_depay_set_output_caps (rtph265depay, srccaps);
607 608
  } else {
    res = TRUE;
609 610
  }

611 612
  gst_caps_unref (srccaps);

613
  /* Insert SPS and PPS into the stream on next opportunity */
614 615
  if (rtph265depay->output_format != GST_H265_STREAM_FORMAT_HVC1
      && (rtph265depay->sps->len > 0 || rtph265depay->pps->len > 0)) {
616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663
    gint i;
    GstBuffer *codec_data;
    GstMapInfo map;
    guint8 *data;
    guint len = 0;

    for (i = 0; i < rtph265depay->sps->len; i++) {
      len += 4 + gst_buffer_get_size (g_ptr_array_index (rtph265depay->sps, i));
    }

    for (i = 0; i < rtph265depay->pps->len; i++) {
      len += 4 + gst_buffer_get_size (g_ptr_array_index (rtph265depay->pps, i));
    }

    codec_data = gst_buffer_new_and_alloc (len);
    gst_buffer_map (codec_data, &map, GST_MAP_WRITE);
    data = map.data;

    for (i = 0; i < rtph265depay->sps->len; i++) {
      GstBuffer *sps_buf = g_ptr_array_index (rtph265depay->sps, i);
      guint sps_size = gst_buffer_get_size (sps_buf);

      if (rtph265depay->byte_stream)
        memcpy (data, sync_bytes, sizeof (sync_bytes));
      else
        GST_WRITE_UINT32_BE (data, sps_size);
      gst_buffer_extract (sps_buf, 0, data + 4, -1);
      data += 4 + sps_size;
    }

    for (i = 0; i < rtph265depay->pps->len; i++) {
      GstBuffer *pps_buf = g_ptr_array_index (rtph265depay->pps, i);
      guint pps_size = gst_buffer_get_size (pps_buf);

      if (rtph265depay->byte_stream)
        memcpy (data, sync_bytes, sizeof (sync_bytes));
      else
        GST_WRITE_UINT32_BE (data, pps_size);
      gst_buffer_extract (pps_buf, 0, data + 4, -1);
      data += 4 + pps_size;
    }

    gst_buffer_unmap (codec_data, &map);
    if (rtph265depay->codec_data)
      gst_buffer_unref (rtph265depay->codec_data);
    rtph265depay->codec_data = codec_data;
  }

664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765
  if (res)
    rtph265depay->new_codec_data = FALSE;

  return res;
}

gboolean
gst_rtp_h265_add_vps_sps_pps (GstElement * rtph265, GPtrArray * vps_array,
    GPtrArray * sps_array, GPtrArray * pps_array, GstBuffer * nal)
{
  GstMapInfo map;
  guchar type;
  guint i;

  gst_buffer_map (nal, &map, GST_MAP_READ);

  type = (map.data[0] >> 1) & 0x3f;

  if (type == GST_H265_VPS_NUT) {
    guint32 vps_id = (map.data[2] >> 4) & 0x0f;

    for (i = 0; i < vps_array->len; i++) {
      GstBuffer *vps = g_ptr_array_index (vps_array, i);
      GstMapInfo vpsmap;
      guint32 tmp_vps_id;

      gst_buffer_map (vps, &vpsmap, GST_MAP_READ);
      tmp_vps_id = (vpsmap.data[2] >> 4) & 0x0f;

      if (vps_id == tmp_vps_id) {
        if (map.size == vpsmap.size &&
            memcmp (map.data, vpsmap.data, vpsmap.size) == 0) {
          GST_LOG_OBJECT (rtph265, "Unchanged VPS %u, not updating", vps_id);
          gst_buffer_unmap (vps, &vpsmap);
          goto drop;
        } else {
          gst_buffer_unmap (vps, &vpsmap);
          g_ptr_array_remove_index_fast (vps_array, i);
          g_ptr_array_add (vps_array, nal);
          GST_LOG_OBJECT (rtph265, "Modified VPS %u, replacing", vps_id);
          goto done;
        }
      }
      gst_buffer_unmap (vps, &vpsmap);
    }
    GST_LOG_OBJECT (rtph265, "Adding new VPS %u", vps_id);
    g_ptr_array_add (vps_array, nal);
  } else if (type == GST_H265_SPS_NUT) {
    guint32 sps_id;

    if (!parse_sps (&map, &sps_id)) {
      GST_WARNING_OBJECT (rtph265, "Invalid SPS,"
          " can't parse seq_parameter_set_id");
      goto drop;
    }

    for (i = 0; i < sps_array->len; i++) {
      GstBuffer *sps = g_ptr_array_index (sps_array, i);
      GstMapInfo spsmap;
      guint32 tmp_sps_id;

      gst_buffer_map (sps, &spsmap, GST_MAP_READ);
      parse_sps (&spsmap, &tmp_sps_id);

      if (sps_id == tmp_sps_id) {
        if (map.size == spsmap.size &&
            memcmp (map.data, spsmap.data, spsmap.size) == 0) {
          GST_LOG_OBJECT (rtph265, "Unchanged SPS %u, not updating", sps_id);
          gst_buffer_unmap (sps, &spsmap);
          goto drop;
        } else {
          gst_buffer_unmap (sps, &spsmap);
          g_ptr_array_remove_index_fast (sps_array, i);
          g_ptr_array_add (sps_array, nal);
          GST_LOG_OBJECT (rtph265, "Modified SPS %u, replacing", sps_id);
          goto done;
        }
      }
      gst_buffer_unmap (sps, &spsmap);
    }
    GST_LOG_OBJECT (rtph265, "Adding new SPS %u", sps_id);
    g_ptr_array_add (sps_array, nal);
  } else if (type == GST_H265_PPS_NUT) {
    guint32 sps_id;
    guint32 pps_id;

    if (!parse_pps (&map, &sps_id, &pps_id)) {
      GST_WARNING_OBJECT (rtph265, "Invalid PPS,"
          " can't parse seq_parameter_set_id or pic_parameter_set_id");
      goto drop;
    }

    for (i = 0; i < pps_array->len; i++) {
      GstBuffer *pps = g_ptr_array_index (pps_array, i);
      GstMapInfo ppsmap;
      guint32 tmp_sps_id;
      guint32 tmp_pps_id;


      gst_buffer_map (pps, &ppsmap, GST_MAP_READ);
      parse_pps (&ppsmap, &tmp_sps_id, &tmp_pps_id);

766
      if (pps_id == tmp_pps_id) {
767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817
        if (map.size == ppsmap.size &&
            memcmp (map.data, ppsmap.data, ppsmap.size) == 0) {
          GST_LOG_OBJECT (rtph265, "Unchanged PPS %u:%u, not updating", sps_id,
              pps_id);
          gst_buffer_unmap (pps, &ppsmap);
          goto drop;
        } else {
          gst_buffer_unmap (pps, &ppsmap);
          g_ptr_array_remove_index_fast (pps_array, i);
          g_ptr_array_add (pps_array, nal);
          GST_LOG_OBJECT (rtph265, "Modified PPS %u:%u, replacing",
              sps_id, pps_id);
          goto done;
        }
      }
      gst_buffer_unmap (pps, &ppsmap);
    }
    GST_LOG_OBJECT (rtph265, "Adding new PPS %u:%i", sps_id, pps_id);
    g_ptr_array_add (pps_array, nal);
  } else {
    goto drop;
  }

done:
  gst_buffer_unmap (nal, &map);

  return TRUE;

drop:
  gst_buffer_unmap (nal, &map);
  gst_buffer_unref (nal);

  return FALSE;
}


static void
gst_rtp_h265_depay_add_vps_sps_pps (GstRtpH265Depay * rtph265depay,
    GstBuffer * nal)
{
  if (gst_rtp_h265_add_vps_sps_pps (GST_ELEMENT (rtph265depay),
          rtph265depay->vps, rtph265depay->sps, rtph265depay->pps, nal))
    rtph265depay->new_codec_data = TRUE;
}

static gboolean
gst_rtp_h265_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
{
  gint clock_rate;
  GstStructure *structure = gst_caps_get_structure (caps, 0);
  GstRtpH265Depay *rtph265depay;
818 819 820 821
  const gchar *vps;
  const gchar *sps;
  const gchar *pps;
  gchar *ps;
822 823 824 825 826 827 828 829 830 831
  GstMapInfo map;
  guint8 *ptr;

  rtph265depay = GST_RTP_H265_DEPAY (depayload);

  if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
    clock_rate = 90000;
  depayload->clock_rate = clock_rate;

  /* Base64 encoded, comma separated config NALs */
832 833 834 835 836 837 838 839
  vps = gst_structure_get_string (structure, "sprop-vps");
  sps = gst_structure_get_string (structure, "sprop-sps");
  pps = gst_structure_get_string (structure, "sprop-pps");
  if (vps == NULL || sps == NULL || pps == NULL) {
    ps = NULL;
  } else {
    ps = g_strdup_printf ("%s,%s,%s", vps, sps, pps);
  }
840 841 842 843 844 845 846 847

  /* negotiate with downstream w.r.t. output format and alignment */
  gst_rtp_h265_depay_negotiate (rtph265depay);

  if (rtph265depay->byte_stream && ps != NULL) {
    /* for bytestream we only need the parameter sets but we don't error out
     * when they are not there, we assume they are in the stream. */
    gchar **params;
848
    GstBuffer *codec_data;
849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910
    guint len, total;
    gint i;

    params = g_strsplit (ps, ",", 0);

    /* count total number of bytes in base64. Also include the sync bytes in
     * front of the params. */
    len = 0;
    for (i = 0; params[i]; i++) {
      len += strlen (params[i]);
      len += sizeof (sync_bytes);
    }
    /* we seriously overshoot the length, but it's fine. */
    codec_data = gst_buffer_new_and_alloc (len);

    gst_buffer_map (codec_data, &map, GST_MAP_WRITE);
    ptr = map.data;
    total = 0;
    for (i = 0; params[i]; i++) {
      guint save = 0;
      gint state = 0;

      GST_DEBUG_OBJECT (depayload, "decoding param %d (%s)", i, params[i]);
      memcpy (ptr, sync_bytes, sizeof (sync_bytes));
      ptr += sizeof (sync_bytes);
      len =
          g_base64_decode_step (params[i], strlen (params[i]), ptr, &state,
          &save);
      GST_DEBUG_OBJECT (depayload, "decoded %d bytes", len);
      total += len + sizeof (sync_bytes);
      ptr += len;
    }
    gst_buffer_unmap (codec_data, &map);
    gst_buffer_resize (codec_data, 0, total);
    g_strfreev (params);

    /* keep the codec_data, we need to send it as the first buffer. We cannot
     * push it in the adapter because the adapter might be flushed on discont.
     */
    if (rtph265depay->codec_data)
      gst_buffer_unref (rtph265depay->codec_data);
    rtph265depay->codec_data = codec_data;
  } else if (!rtph265depay->byte_stream) {
    gchar **params;
    gint i;

    if (ps == NULL)
      goto incomplete_caps;

    params = g_strsplit (ps, ",", 0);

    GST_DEBUG_OBJECT (depayload, "we have %d params", g_strv_length (params));

    /* start with 23 bytes header */
    for (i = 0; params[i]; i++) {
      GstBuffer *nal;
      GstMapInfo nalmap;
      gsize nal_len;
      guint save = 0;
      gint state = 0;

      nal_len = strlen (params[i]);
911 912 913 914
      if (nal_len == 0) {
        GST_WARNING_OBJECT (depayload, "empty param '%s' (#%d)", params[i], i);
        continue;
      }
915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932
      nal = gst_buffer_new_and_alloc (nal_len);
      gst_buffer_map (nal, &nalmap, GST_MAP_READWRITE);

      nal_len =
          g_base64_decode_step (params[i], nal_len, nalmap.data, &state, &save);

      GST_DEBUG_OBJECT (depayload, "adding param %d as %s", i,
          (((nalmap.data[0] >> 1) & 0x3f) ==
              32) ? "VPS" : (((nalmap.data[0] >> 1) & 0x3f) ==
              33) ? "SPS" : "PPS");

      gst_buffer_unmap (nal, &nalmap);
      gst_buffer_set_size (nal, nal_len);

      gst_rtp_h265_depay_add_vps_sps_pps (rtph265depay, nal);
    }
    g_strfreev (params);

933 934
    if (rtph265depay->vps->len == 0 || rtph265depay->sps->len == 0 ||
        rtph265depay->pps->len == 0) {
935
      goto incomplete_caps;
936
    }
937 938
  }

939 940
  g_free (ps);

941 942 943 944 945 946 947
  return gst_rtp_h265_set_src_caps (rtph265depay);

  /* ERRORS */
incomplete_caps:
  {
    GST_DEBUG_OBJECT (depayload, "we have incomplete caps,"
        " doing setcaps later");
948
    g_free (ps);
949 950 951 952
    return TRUE;
  }
}

953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970
static GstBuffer *
gst_rtp_h265_depay_allocate_output_buffer (GstRtpH265Depay * depay, gsize size)
{
  GstBuffer *buffer = NULL;

  g_return_val_if_fail (size > 0, NULL);

  GST_LOG_OBJECT (depay, "want output buffer of %u bytes", (guint) size);

  buffer = gst_buffer_new_allocate (depay->allocator, size, &depay->params);
  if (buffer == NULL) {
    GST_INFO_OBJECT (depay, "couldn't allocate output buffer");
    buffer = gst_buffer_new_allocate (NULL, size, NULL);
  }

  return buffer;
}

971 972 973 974
static GstBuffer *
gst_rtp_h265_complete_au (GstRtpH265Depay * rtph265depay,
    GstClockTime * out_timestamp, gboolean * out_keyframe)
{
975 976
  GstBufferList *list;
  GstMapInfo outmap;
977
  GstBuffer *outbuf;
978 979
  guint outsize, offset = 0;
  gint b, n_bufs, m, n_mem;
980 981 982 983

  /* we had a picture in the adapter and we completed it */
  GST_DEBUG_OBJECT (rtph265depay, "taking completed AU");
  outsize = gst_adapter_available (rtph265depay->picture_adapter);
984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017

  outbuf = gst_rtp_h265_depay_allocate_output_buffer (rtph265depay, outsize);

  if (outbuf == NULL)
    return NULL;

  if (!gst_buffer_map (outbuf, &outmap, GST_MAP_WRITE))
    return NULL;

  list = gst_adapter_take_buffer_list (rtph265depay->picture_adapter, outsize);

  n_bufs = gst_buffer_list_length (list);
  for (b = 0; b < n_bufs; ++b) {
    GstBuffer *buf = gst_buffer_list_get (list, b);

    n_mem = gst_buffer_n_memory (buf);
    for (m = 0; m < n_mem; ++m) {
      GstMemory *mem = gst_buffer_peek_memory (buf, m);
      gsize mem_size = gst_memory_get_sizes (mem, NULL, NULL);
      GstMapInfo mem_map;

      if (gst_memory_map (mem, &mem_map, GST_MAP_READ)) {
        memcpy (outmap.data + offset, mem_map.data, mem_size);
        gst_memory_unmap (mem, &mem_map);
      } else {
        memset (outmap.data + offset, 0, mem_size);
      }
      offset += mem_size;
    }

    gst_rtp_copy_video_meta (rtph265depay, outbuf, buf);
  }
  gst_buffer_list_unref (list);
  gst_buffer_unmap (outbuf, &outmap);
1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049

  *out_timestamp = rtph265depay->last_ts;
  *out_keyframe = rtph265depay->last_keyframe;

  rtph265depay->last_keyframe = FALSE;
  rtph265depay->picture_start = FALSE;

  return outbuf;
}

/* VPS/SPS/PPS/RADL/TSA/RASL/IDR/CRA is considered key, all others DELTA;
 * so downstream waiting for keyframe can pick up at VPS/SPS/PPS/IDR */

#define NAL_TYPE_IS_PARAMETER_SET(nt) (		((nt) == GST_H265_VPS_NUT)\
										||  ((nt) == GST_H265_SPS_NUT)\
										||  ((nt) == GST_H265_PPS_NUT)				)

#define NAL_TYPE_IS_CODED_SLICE_SEGMENT(nt) (		((nt) == GST_H265_NAL_SLICE_TRAIL_N)\
												|| 	((nt) == GST_H265_NAL_SLICE_TRAIL_R)\
												||  ((nt) == GST_H265_NAL_SLICE_TSA_N)\
												||  ((nt) == GST_H265_NAL_SLICE_TSA_R)\
												||  ((nt) == GST_H265_NAL_SLICE_STSA_N)\
												||  ((nt) == GST_H265_NAL_SLICE_STSA_R)\
												||  ((nt) == GST_H265_NAL_SLICE_RASL_N)\
												||  ((nt) == GST_H265_NAL_SLICE_RASL_R)\
												||  ((nt) == GST_H265_NAL_SLICE_BLA_W_LP)\
												||  ((nt) == GST_H265_NAL_SLICE_BLA_W_RADL)\
												||  ((nt) == GST_H265_NAL_SLICE_BLA_N_LP)\
												||  ((nt) == GST_H265_NAL_SLICE_IDR_W_RADL)\
												||  ((nt) == GST_H265_NAL_SLICE_IDR_N_LP)\
												||  ((nt) == GST_H265_NAL_SLICE_CRA_NUT)		)

1050 1051 1052 1053 1054 1055 1056 1057 1058
/* Intra random access point */
#define NAL_TYPE_IS_IRAP(nt)   (((nt) == GST_H265_NAL_SLICE_BLA_W_LP)   \
                             || ((nt) == GST_H265_NAL_SLICE_BLA_W_RADL) \
                             || ((nt) == GST_H265_NAL_SLICE_BLA_N_LP)   \
                             || ((nt) == GST_H265_NAL_SLICE_IDR_W_RADL) \
                             || ((nt) == GST_H265_NAL_SLICE_IDR_N_LP)   \
                             || ((nt) == GST_H265_NAL_SLICE_CRA_NUT))

#define NAL_TYPE_IS_KEY(nt) (NAL_TYPE_IS_PARAMETER_SET(nt) || NAL_TYPE_IS_IRAP(nt))
1059

1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088
static void
gst_rtp_h265_depay_push (GstRtpH265Depay * rtph265depay, GstBuffer * outbuf,
    gboolean keyframe, GstClockTime timestamp, gboolean marker)
{
  /* prepend codec_data */
  if (rtph265depay->codec_data) {
    GST_DEBUG_OBJECT (rtph265depay, "prepending codec_data");
    gst_rtp_copy_video_meta (rtph265depay, rtph265depay->codec_data, outbuf);
    outbuf = gst_buffer_append (rtph265depay->codec_data, outbuf);
    rtph265depay->codec_data = NULL;
    keyframe = TRUE;
  }
  outbuf = gst_buffer_make_writable (outbuf);

  gst_rtp_drop_non_video_meta (rtph265depay, outbuf);

  GST_BUFFER_PTS (outbuf) = timestamp;

  if (keyframe)
    GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
  else
    GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);

  if (marker)
    GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_MARKER);

  gst_rtp_base_depayload_push (GST_RTP_BASE_DEPAYLOAD (rtph265depay), outbuf);
}

1089
static void
1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119
gst_rtp_h265_depay_handle_nal (GstRtpH265Depay * rtph265depay, GstBuffer * nal,
    GstClockTime in_timestamp, gboolean marker)
{
  GstRTPBaseDepayload *depayload = GST_RTP_BASE_DEPAYLOAD (rtph265depay);
  gint nal_type;
  GstMapInfo map;
  GstBuffer *outbuf = NULL;
  GstClockTime out_timestamp;
  gboolean keyframe, out_keyframe;

  gst_buffer_map (nal, &map, GST_MAP_READ);
  if (G_UNLIKELY (map.size < 5))
    goto short_nal;

  nal_type = (map.data[4] >> 1) & 0x3f;
  GST_DEBUG_OBJECT (rtph265depay, "handle NAL type %d (RTP marker bit %d)",
      nal_type, marker);

  keyframe = NAL_TYPE_IS_KEY (nal_type);

  out_keyframe = keyframe;
  out_timestamp = in_timestamp;

  if (!rtph265depay->byte_stream) {
    if (NAL_TYPE_IS_PARAMETER_SET (nal_type)) {
      gst_rtp_h265_depay_add_vps_sps_pps (rtph265depay,
          gst_buffer_copy_region (nal, GST_BUFFER_COPY_ALL,
              4, gst_buffer_get_size (nal) - 4));
      gst_buffer_unmap (nal, &map);
      gst_buffer_unref (nal);
1120
      return;
1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
    } else if (rtph265depay->sps->len == 0 || rtph265depay->pps->len == 0) {
      /* Down push down any buffer in non-bytestream mode if the SPS/PPS haven't
       * go through yet
       */
      gst_pad_push_event (GST_RTP_BASE_DEPAYLOAD_SINKPAD (depayload),
          gst_event_new_custom (GST_EVENT_CUSTOM_UPSTREAM,
              gst_structure_new ("GstForceKeyUnit",
                  "all-headers", G_TYPE_BOOLEAN, TRUE, NULL)));
      gst_buffer_unmap (nal, &map);
      gst_buffer_unref (nal);
1131
      return;
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151
    }

    if (rtph265depay->new_codec_data &&
        rtph265depay->sps->len > 0 && rtph265depay->pps->len > 0)
      gst_rtp_h265_set_src_caps (rtph265depay);
  }

  if (rtph265depay->merge) {
    gboolean start = FALSE, complete = FALSE;

    /* marker bit isn't mandatory so in the following code we try to detect
     * an AU boundary (see H.265 spec section 7.4.2.4.4) */
    if (!marker) {
      if (NAL_TYPE_IS_CODED_SLICE_SEGMENT (nal_type)) {
        /* A NAL unit (X) ends an access unit if the next-occurring VCL NAL unit (Y) has the high-order bit of the first byte after its NAL unit header equal to 1 */
        start = TRUE;
        if (((map.data[6] >> 7) & 0x01) == 1) {
          complete = TRUE;
        }
      } else if ((nal_type >= 32 && nal_type <= 35)
1152 1153
          || nal_type == 39 || (nal_type >= 41 && nal_type <= 44)
          || (nal_type >= 48 && nal_type <= 55)) {
1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182
        /* VPS, SPS, PPS, SEI, ... terminate an access unit */
        complete = TRUE;
      }
      GST_DEBUG_OBJECT (depayload, "start %d, complete %d", start, complete);

      if (complete && rtph265depay->picture_start)
        outbuf = gst_rtp_h265_complete_au (rtph265depay, &out_timestamp,
            &out_keyframe);
    }
    /* add to adapter */
    gst_buffer_unmap (nal, &map);

    GST_DEBUG_OBJECT (depayload, "adding NAL to picture adapter");
    gst_adapter_push (rtph265depay->picture_adapter, nal);
    rtph265depay->last_ts = in_timestamp;
    rtph265depay->last_keyframe |= keyframe;
    rtph265depay->picture_start |= start;

    if (marker)
      outbuf = gst_rtp_h265_complete_au (rtph265depay, &out_timestamp,
          &out_keyframe);
  } else {
    /* no merge, output is input nal */
    GST_DEBUG_OBJECT (depayload, "using NAL as output");
    outbuf = nal;
    gst_buffer_unmap (nal, &map);
  }

  if (outbuf) {
1183 1184
    gst_rtp_h265_depay_push (rtph265depay, outbuf, out_keyframe, out_timestamp,
        marker);
1185 1186
  }

1187
  return;
1188 1189 1190 1191 1192 1193 1194

  /* ERRORS */
short_nal:
  {
    GST_WARNING_OBJECT (depayload, "dropping short NAL");
    gst_buffer_unmap (nal, &map);
    gst_buffer_unref (nal);
1195
    return;
1196 1197 1198
  }
}

1199 1200
static void
gst_rtp_h265_finish_fragmentation_unit (GstRtpH265Depay * rtph265depay)
1201 1202 1203 1204 1205 1206
{
  guint outsize;
  GstMapInfo map;
  GstBuffer *outbuf;

  outsize = gst_adapter_available (rtph265depay->adapter);
1207 1208
  g_assert (outsize >= 4);

1209 1210 1211 1212 1213 1214 1215 1216
  outbuf = gst_adapter_take_buffer (rtph265depay->adapter, outsize);

  gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
  GST_DEBUG_OBJECT (rtph265depay, "output %d bytes", outsize);

  if (rtph265depay->byte_stream) {
    memcpy (map.data, sync_bytes, sizeof (sync_bytes));
  } else {
1217
    GST_WRITE_UINT32_BE (map.data, outsize - 4);
1218 1219 1220 1221 1222
  }
  gst_buffer_unmap (outbuf, &map);

  rtph265depay->current_fu_type = 0;

1223
  gst_rtp_h265_depay_handle_nal (rtph265depay, outbuf,
1224 1225 1226 1227
      rtph265depay->fu_timestamp, rtph265depay->fu_marker);
}

static GstBuffer *
1228
gst_rtp_h265_depay_process (GstRTPBaseDepayload * depayload, GstRTPBuffer * rtp)
1229 1230 1231 1232 1233 1234 1235 1236
{
  GstRtpH265Depay *rtph265depay;
  GstBuffer *outbuf = NULL;
  guint8 nal_unit_type;

  rtph265depay = GST_RTP_H265_DEPAY (depayload);

  /* flush remaining data on discont */
1237
  if (GST_BUFFER_IS_DISCONT (rtp->buffer)) {
1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253
    gst_adapter_clear (rtph265depay->adapter);
    rtph265depay->wait_start = TRUE;
    rtph265depay->current_fu_type = 0;
  }

  {
    gint payload_len;
    guint8 *payload;
    guint header_len;
    GstMapInfo map;
    guint outsize, nalu_size;
    GstClockTime timestamp;
    gboolean marker;
    guint8 nuh_layer_id, nuh_temporal_id_plus1;
    guint8 S, E;
    guint16 nal_header;
1254 1255 1256
#if 0
    gboolean donl_present = FALSE;
#endif
1257

1258
    timestamp = GST_BUFFER_PTS (rtp->buffer);
1259

1260 1261 1262
    payload_len = gst_rtp_buffer_get_payload_len (rtp);
    payload = gst_rtp_buffer_get_payload (rtp);
    marker = gst_rtp_buffer_get_marker (rtp);
1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298

    GST_DEBUG_OBJECT (rtph265depay, "receiving %d bytes", payload_len);

    if (payload_len == 0)
      goto empty_packet;

    /* +---------------+---------------+
     * |0|1|2|3|4|5|6|7|0|1|2|3|4|5|6|7|
     * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     * |F|   Type    |  LayerId  | TID |
     * +-------------+-----------------+
     *
     * F must be 0.
     *
     */
    nal_unit_type = (payload[0] >> 1) & 0x3f;
    nuh_layer_id = ((payload[0] & 0x01) << 5) | (payload[1] >> 3);      /* should be zero for now but this could change in future HEVC extensions */
    nuh_temporal_id_plus1 = payload[1] & 0x03;

    /* At least two byte header with type */
    header_len = 2;

    GST_DEBUG_OBJECT (rtph265depay,
        "NAL header nal_unit_type %d, nuh_temporal_id_plus1 %d", nal_unit_type,
        nuh_temporal_id_plus1);

    GST_FIXME_OBJECT (rtph265depay, "Assuming DONL field is not present");

    /* FIXME - assuming DONL field is not present for now */
    /*donl_present = (tx-mode == "MST") || (sprop-max-don-diff > 0); */

    /* If FU unit was being processed, but the current nal is of a different
     * type.  Assume that the remote payloader is buggy (didn't set the end bit
     * when the FU ended) and send out what we gathered thusfar */
    if (G_UNLIKELY (rtph265depay->current_fu_type != 0 &&
            nal_unit_type != rtph265depay->current_fu_type))
1299
      gst_rtp_h265_finish_fragmentation_unit (rtph265depay);
1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338

    switch (nal_unit_type) {
      case 48:
      {
        GST_DEBUG_OBJECT (rtph265depay, "Processing aggregation packet");

        /* Aggregation packet (section 4.7) */

        /*  An example of an AP packet containing two aggregation units
           without the DONL and DOND fields

           0                   1                   2                   3
           0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
           +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
           |                          RTP Header                           |
           +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
           |   PayloadHdr (Type=48)        |         NALU 1 Size           |
           +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
           |          NALU 1 HDR           |                               |
           +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+         NALU 1 Data           |
           |                   . . .                                       |
           |                                                               |
           +               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
           |  . . .        | NALU 2 Size                   | NALU 2 HDR    |
           +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
           | NALU 2 HDR    |                                               |
           +-+-+-+-+-+-+-+-+              NALU 2 Data                      |
           |                   . . .                                       |
           |                               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
           |                               :...OPTIONAL RTP padding        |
           +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
         */

        /* strip headers */
        payload += header_len;
        payload_len -= header_len;

        rtph265depay->wait_start = FALSE;

1339
#if 0
1340 1341
        if (donl_present)
          goto not_implemented_donl_present;
1342
#endif
1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358

        while (payload_len > 2) {

          nalu_size = (payload[0] << 8) | payload[1];

          /* dont include nalu_size */
          if (nalu_size > (payload_len - 2))
            nalu_size = payload_len - 2;

          outsize = nalu_size + sizeof (sync_bytes);
          outbuf = gst_buffer_new_and_alloc (outsize);

          gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
          if (rtph265depay->byte_stream) {
            memcpy (map.data, sync_bytes, sizeof (sync_bytes));
          } else {
1359
            GST_WRITE_UINT32_BE (map.data, nalu_size);
1360 1361 1362 1363 1364 1365 1366 1367 1368
          }

          /* strip NALU size */
          payload += 2;
          payload_len -= 2;

          memcpy (map.data + sizeof (sync_bytes), payload, nalu_size);
          gst_buffer_unmap (outbuf, &map);

1369
          gst_rtp_copy_video_meta (rtph265depay, outbuf, rtp->buffer);
1370

1371
          gst_rtp_h265_depay_handle_nal (rtph265depay, outbuf, timestamp,
1372
              marker);
1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416

          payload += nalu_size;
          payload_len -= nalu_size;
        }
        break;
      }
      case 49:
      {
        GST_DEBUG_OBJECT (rtph265depay, "Processing Fragmentation Unit");

        /* Fragmentation units (FUs)  Section 4.8 */

        /*    The structure of a Fragmentation Unit (FU)
         *
         *    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
         |    PayloadHdr (Type=49)       |   FU header   | DONL (cond)   |
         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
         | DONL (cond)   |                                               |
         |-+-+-+-+-+-+-+-+                                               |
         |                         FU payload                            |
         |                                                               |
         |                               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
         |                               :...OPTIONAL RTP padding        |
         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
         *
         *
         */

        /* strip headers */
        payload += header_len;
        payload_len -= header_len;

        /* processing FU header */
        S = (payload[0] & 0x80) == 0x80;
        E = (payload[0] & 0x40) == 0x40;

        GST_DEBUG_OBJECT (rtph265depay,
            "FU header with S %d, E %d, nal_unit_type %d", S, E,
            payload[0] & 0x3f);

        if (rtph265depay->wait_start && !S)
          goto waiting_start;

1417
#if 0
1418 1419
        if (donl_present)
          goto not_implemented_donl_present;
1420
#endif
1421 1422 1423 1424 1425 1426 1427 1428 1429

        if (S) {

          GST_DEBUG_OBJECT (rtph265depay, "Start of Fragmentation Unit");

          /* If a new FU unit started, while still processing an older one.
           * Assume that the remote payloader is buggy (doesn't set the end
           * bit) and send out what we've gathered thusfar */
          if (G_UNLIKELY (rtph265depay->current_fu_type != 0))
1430
            gst_rtp_h265_finish_fragmentation_unit (rtph265depay);
1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452

          rtph265depay->current_fu_type = nal_unit_type;
          rtph265depay->fu_timestamp = timestamp;

          rtph265depay->wait_start = FALSE;

          /* reconstruct NAL header */
          nal_header =
              ((payload[0] & 0x3f) << 9) | (nuh_layer_id << 3) |
              nuh_temporal_id_plus1;

          /* go back one byte so we can copy the payload + two bytes more in the front which
           * will be overwritten by the nal_header
           */
          payload -= 1;
          payload_len += 1;

          nalu_size = payload_len;
          outsize = nalu_size + sizeof (sync_bytes);
          outbuf = gst_buffer_new_and_alloc (outsize);

          gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
1453 1454 1455 1456 1457 1458
          if (rtph265depay->byte_stream) {
            GST_WRITE_UINT32_BE (map.data, 0x00000001);
          } else {
            /* will be fixed up in finish_fragmentation_unit() */
            GST_WRITE_UINT32_BE (map.data, 0xffffffff);
          }
1459
          memcpy (map.data + sizeof (sync_bytes), payload, nalu_size);
1460 1461
          map.data[4] = nal_header >> 8;
          map.data[5] = nal_header & 0xff;
1462 1463
          gst_buffer_unmap (outbuf, &map);

1464
          gst_rtp_copy_video_meta (rtph265depay, outbuf, rtp->buffer);
1465

1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482
          GST_DEBUG_OBJECT (rtph265depay, "queueing %d bytes", outsize);

          /* and assemble in the adapter */
          gst_adapter_push (rtph265depay->adapter, outbuf);
        } else {

          GST_DEBUG_OBJECT (rtph265depay,
              "Following part of Fragmentation Unit");

          /* strip off FU header byte */
          payload += 1;
          payload_len -= 1;

          outsize = payload_len;
          outbuf = gst_buffer_new_and_alloc (outsize);
          gst_buffer_fill (outbuf, 0, payload, outsize);

1483
          gst_rtp_copy_video_meta (rtph265depay, outbuf, rtp->buffer);
1484

1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495
          GST_DEBUG_OBJECT (rtph265depay, "queueing %d bytes", outsize);

          /* and assemble in the adapter */
          gst_adapter_push (rtph265depay->adapter, outbuf);
        }

        outbuf = NULL;
        rtph265depay->fu_marker = marker;

        /* if NAL unit ends, flush the adapter */
        if (E) {
1496
          gst_rtp_h265_finish_fragmentation_unit (rtph265depay);
1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509
          GST_DEBUG_OBJECT (rtph265depay, "End of Fragmentation Unit");
        }
        break;
      }
      case 50:
        goto not_implemented;   /* PACI packets  Section 4.9 */
      default:
      {
        rtph265depay->wait_start = FALSE;

        /* All other cases: Single NAL unit packet   Section 4.6 */
        /* the entire payload is the output buffer */

1510
#if 0
1511 1512
        if (donl_present)
          goto not_implemented_donl_present;
1513
#endif
1514 1515 1516 1517 1518 1519 1520 1521 1522

        nalu_size = payload_len;
        outsize = nalu_size + sizeof (sync_bytes);
        outbuf = gst_buffer_new_and_alloc (outsize);

        gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
        if (rtph265depay->byte_stream) {
          memcpy (map.data, sync_bytes, sizeof (sync_bytes));
        } else {
1523
          GST_WRITE_UINT32_BE (map.data, nalu_size);
1524
        }
1525
        memcpy (map.data + 4, payload, nalu_size);
1526 1527
        gst_buffer_unmap (outbuf, &map);

1528
        gst_rtp_copy_video_meta (rtph265depay, outbuf, rtp->buffer);
1529

1530
        gst_rtp_h265_depay_handle_nal (rtph265depay, outbuf, timestamp, marker);
1531 1532 1533 1534 1535
        break;
      }
    }
  }

1536
  return NULL;
1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548

  /* ERRORS */
empty_packet:
  {
    GST_DEBUG_OBJECT (rtph265depay, "empty packet");
    return NULL;
  }
waiting_start:
  {
    GST_DEBUG_OBJECT (rtph265depay, "waiting for start");
    return NULL;
  }
1549
#if 0
1550 1551 1552 1553 1554 1555
not_implemented_donl_present:
  {
    GST_ELEMENT_ERROR (rtph265depay, STREAM, FORMAT,
        (NULL), ("DONL field present not supported yet"));
    return NULL;
  }
1556
#endif
1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573
not_implemented:
  {
    GST_ELEMENT_ERROR (rtph265depay, STREAM, FORMAT,
        (NULL), ("NAL unit type %d not supported yet", nal_unit_type));
    return NULL;
  }
}

static gboolean
gst_rtp_h265_depay_handle_event (GstRTPBaseDepayload * depay, GstEvent * event)
{
  GstRtpH265Depay *rtph265depay;

  rtph265depay = GST_RTP_H265_DEPAY (depay);

  switch (GST_EVENT_TYPE (event)) {
    case GST_EVENT_FLUSH_STOP:
1574
      gst_rtp_h265_depay_reset (rtph265depay, FALSE);
1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596
      break;
    default:
      break;
  }

  return
      GST_RTP_BASE_DEPAYLOAD_CLASS (parent_class)->handle_event (depay, event);
}

static GstStateChangeReturn
gst_rtp_h265_depay_change_state (GstElement * element,
    GstStateChange transition)
{
  GstRtpH265Depay *rtph265depay;
  GstStateChangeReturn ret;

  rtph265depay = GST_RTP_H265_DEPAY (element);

  switch (transition) {
    case GST_STATE_CHANGE_NULL_TO_READY:
      break;
    case GST_STATE_CHANGE_READY_TO_PAUSED:
1597
      gst_rtp_h265_depay_reset (rtph265depay, TRUE);
1598 1599 1600 1601 1602 1603 1604 1605
      break;
    default:
      break;
  }

  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

  switch (transition) {
1606 1607 1608
    case GST_STATE_CHANGE_PAUSED_TO_READY:
      gst_rtp_h265_depay_reset (rtph265depay, TRUE);
      break;
1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625
    case GST_STATE_CHANGE_READY_TO_NULL:
      break;
    default:
      break;
  }
  return ret;
}

gboolean
gst_rtp_h265_depay_plugin_init (GstPlugin * plugin)
{
  GST_DEBUG_CATEGORY_INIT (rtph265depay_debug, "rtph265depay", 0,
      "H265 Video RTP Depayloader");

  return gst_element_register (plugin, "rtph265depay",
      GST_RANK_SECONDARY, GST_TYPE_RTP_H265_DEPAY);
}