2 * Copyright (C) <2006> Wim Taymans <wim.taymans@gmail.com>
3 * Copyright (C) <2014> Jurgen Slowack <jurgenslowack@gmail.com>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
28 #include <gst/base/gstbitreader.h>
29 #include <gst/rtp/gstrtpbuffer.h>
30 #include <gst/video/video.h>
31 #include "gstrtph265depay.h"
32 #include "gstrtputils.h"
34 GST_DEBUG_CATEGORY_STATIC (rtph265depay_debug);
35 #define GST_CAT_DEFAULT (rtph265depay_debug)
37 /* This is what we'll default to when downstream hasn't
38 * expressed a restriction or preference via caps */
39 #define DEFAULT_STREAM_FORMAT GST_H265_STREAM_FORMAT_BYTESTREAM
40 #define DEFAULT_ACCESS_UNIT FALSE
42 /* 3 zero bytes syncword */
43 static const guint8 sync_bytes[] = { 0, 0, 0, 1 };
45 static GstStaticPadTemplate gst_rtp_h265_depay_src_template =
46 GST_STATIC_PAD_TEMPLATE ("src",
50 ("video/x-h265, stream-format=(string)hvc1, alignment=(string)au; "
51 /* FIXME: hev1 format is not supported yet */
53 "stream-format = (string) hev1, alignment = (string) au; " */
55 "stream-format = (string) byte-stream, alignment = (string) { nal, au }")
58 static GstStaticPadTemplate gst_rtp_h265_depay_sink_template =
59 GST_STATIC_PAD_TEMPLATE ("sink",
62 GST_STATIC_CAPS ("application/x-rtp, "
63 "media = (string) \"video\", "
64 "clock-rate = (int) 90000, " "encoding-name = (string) \"H265\"")
65 /** optional parameters **/
66 /* "profile-space = (int) [ 0, 3 ], " */
67 /* "profile-id = (int) [ 0, 31 ], " */
68 /* "tier-flag = (int) [ 0, 1 ], " */
69 /* "level-id = (int) [ 0, 255 ], " */
70 /* "interop-constraints = (string) ANY, " */
71 /* "profile-compatibility-indicator = (string) ANY, " */
72 /* "sprop-sub-layer-id = (int) [ 0, 6 ], " */
73 /* "recv-sub-layer-id = (int) [ 0, 6 ], " */
74 /* "max-recv-level-id = (int) [ 0, 255 ], " */
75 /* "tx-mode = (string) {MST , SST}, " */
76 /* "sprop-vps = (string) ANY, " */
77 /* "sprop-sps = (string) ANY, " */
78 /* "sprop-pps = (string) ANY, " */
79 /* "sprop-sei = (string) ANY, " */
80 /* "max-lsr = (int) ANY, " *//* MUST be in the range of MaxLumaSR to 16 * MaxLumaSR, inclusive */
81 /* "max-lps = (int) ANY, " *//* MUST be in the range of MaxLumaPS to 16 * MaxLumaPS, inclusive */
82 /* "max-cpb = (int) ANY, " *//* MUST be in the range of MaxCPB to 16 * MaxCPB, inclusive */
83 /* "max-dpb = (int) [1, 16], " */
84 /* "max-br = (int) ANY, " *//* MUST be in the range of MaxBR to 16 * MaxBR, inclusive, for the highest level */
85 /* "max-tr = (int) ANY, " *//* MUST be in the range of MaxTileRows to 16 * MaxTileRows, inclusive, for the highest level */
86 /* "max-tc = (int) ANY, " *//* MUST be in the range of MaxTileCols to 16 * MaxTileCols, inclusive, for the highest level */
87 /* "max-fps = (int) ANY, " */
88 /* "sprop-max-don-diff = (int) [0, 32767], " */
89 /* "sprop-depack-buf-nalus = (int) [0, 32767], " */
90 /* "sprop-depack-buf-nalus = (int) [0, 4294967295], " */
91 /* "depack-buf-cap = (int) [1, 4294967295], " */
92 /* "sprop-segmentation-id = (int) [0, 3], " */
93 /* "sprop-spatial-segmentation-idc = (string) ANY, " */
94 /* "dec-parallel-cap = (string) ANY, " */
97 #define gst_rtp_h265_depay_parent_class parent_class
98 G_DEFINE_TYPE (GstRtpH265Depay, gst_rtp_h265_depay,
99 GST_TYPE_RTP_BASE_DEPAYLOAD);
101 static void gst_rtp_h265_depay_finalize (GObject * object);
103 static GstStateChangeReturn gst_rtp_h265_depay_change_state (GstElement *
104 element, GstStateChange transition);
106 static GstBuffer *gst_rtp_h265_depay_process (GstRTPBaseDepayload * depayload,
108 static gboolean gst_rtp_h265_depay_setcaps (GstRTPBaseDepayload * filter,
110 static gboolean gst_rtp_h265_depay_handle_event (GstRTPBaseDepayload * depay,
114 gst_rtp_h265_depay_class_init (GstRtpH265DepayClass * klass)
116 GObjectClass *gobject_class;
117 GstElementClass *gstelement_class;
118 GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;
120 gobject_class = (GObjectClass *) klass;
121 gstelement_class = (GstElementClass *) klass;
122 gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;
124 gobject_class->finalize = gst_rtp_h265_depay_finalize;
126 gst_element_class_add_static_pad_template (gstelement_class,
127 &gst_rtp_h265_depay_src_template);
128 gst_element_class_add_static_pad_template (gstelement_class,
129 &gst_rtp_h265_depay_sink_template);
131 gst_element_class_set_static_metadata (gstelement_class,
132 "RTP H265 depayloader", "Codec/Depayloader/Network/RTP",
133 "Extracts H265 video from RTP packets (RFC 7798)",
134 "Jurgen Slowack <jurgenslowack@gmail.com>");
135 gstelement_class->change_state = gst_rtp_h265_depay_change_state;
137 gstrtpbasedepayload_class->process_rtp_packet = gst_rtp_h265_depay_process;
138 gstrtpbasedepayload_class->set_caps = gst_rtp_h265_depay_setcaps;
139 gstrtpbasedepayload_class->handle_event = gst_rtp_h265_depay_handle_event;
143 gst_rtp_h265_depay_init (GstRtpH265Depay * rtph265depay)
145 rtph265depay->adapter = gst_adapter_new ();
146 rtph265depay->picture_adapter = gst_adapter_new ();
147 rtph265depay->output_format = DEFAULT_STREAM_FORMAT;
148 rtph265depay->byte_stream =
149 (DEFAULT_STREAM_FORMAT == GST_H265_STREAM_FORMAT_BYTESTREAM);
150 rtph265depay->stream_format = NULL;
151 rtph265depay->merge = DEFAULT_ACCESS_UNIT;
152 rtph265depay->vps = g_ptr_array_new_with_free_func (
153 (GDestroyNotify) gst_buffer_unref);
154 rtph265depay->sps = g_ptr_array_new_with_free_func (
155 (GDestroyNotify) gst_buffer_unref);
156 rtph265depay->pps = g_ptr_array_new_with_free_func (
157 (GDestroyNotify) gst_buffer_unref);
161 gst_rtp_h265_depay_reset (GstRtpH265Depay * rtph265depay, gboolean hard)
163 gst_adapter_clear (rtph265depay->adapter);
164 rtph265depay->wait_start = TRUE;
165 gst_adapter_clear (rtph265depay->picture_adapter);
166 rtph265depay->picture_start = FALSE;
167 rtph265depay->last_keyframe = FALSE;
168 rtph265depay->last_ts = 0;
169 rtph265depay->current_fu_type = 0;
170 rtph265depay->new_codec_data = FALSE;
171 g_ptr_array_set_size (rtph265depay->vps, 0);
172 g_ptr_array_set_size (rtph265depay->sps, 0);
173 g_ptr_array_set_size (rtph265depay->pps, 0);
176 if (rtph265depay->allocator != NULL) {
177 gst_object_unref (rtph265depay->allocator);
178 rtph265depay->allocator = NULL;
180 gst_allocation_params_init (&rtph265depay->params);
185 gst_rtp_h265_depay_finalize (GObject * object)
187 GstRtpH265Depay *rtph265depay;
189 rtph265depay = GST_RTP_H265_DEPAY (object);
191 if (rtph265depay->codec_data)
192 gst_buffer_unref (rtph265depay->codec_data);
194 g_object_unref (rtph265depay->adapter);
195 g_object_unref (rtph265depay->picture_adapter);
197 g_ptr_array_free (rtph265depay->vps, TRUE);
198 g_ptr_array_free (rtph265depay->sps, TRUE);
199 g_ptr_array_free (rtph265depay->pps, TRUE);
201 G_OBJECT_CLASS (parent_class)->finalize (object);
204 static inline const gchar *
205 stream_format_get_nick (GstH265StreamFormat fmt)
208 case GST_H265_STREAM_FORMAT_BYTESTREAM:
209 return "byte-stream";
210 case GST_H265_STREAM_FORMAT_HVC1:
212 case GST_H265_STREAM_FORMAT_HEV1:
221 gst_rtp_h265_depay_negotiate (GstRtpH265Depay * rtph265depay)
223 GstH265StreamFormat stream_format = GST_H265_STREAM_FORMAT_UNKNOWN;
228 gst_pad_get_allowed_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (rtph265depay));
230 GST_DEBUG_OBJECT (rtph265depay, "allowed caps: %" GST_PTR_FORMAT, caps);
233 if (gst_caps_get_size (caps) > 0) {
234 GstStructure *s = gst_caps_get_structure (caps, 0);
235 const gchar *str = NULL;
237 if ((str = gst_structure_get_string (s, "stream-format"))) {
238 rtph265depay->stream_format = g_intern_string (str);
240 if (strcmp (str, "hev1") == 0) {
241 stream_format = GST_H265_STREAM_FORMAT_HEV1;
242 } else if (strcmp (str, "hvc1") == 0) {
243 stream_format = GST_H265_STREAM_FORMAT_HVC1;
244 } else if (strcmp (str, "byte-stream") == 0) {
245 stream_format = GST_H265_STREAM_FORMAT_BYTESTREAM;
247 GST_DEBUG_OBJECT (rtph265depay, "unknown stream-format: %s", str);
251 if ((str = gst_structure_get_string (s, "alignment"))) {
252 if (strcmp (str, "au") == 0) {
254 } else if (strcmp (str, "nal") == 0) {
257 GST_DEBUG_OBJECT (rtph265depay, "unknown alignment: %s", str);
261 gst_caps_unref (caps);
264 if (stream_format != GST_H265_STREAM_FORMAT_UNKNOWN) {
265 GST_DEBUG_OBJECT (rtph265depay, "downstream wants stream-format %s",
266 stream_format_get_nick (stream_format));
267 rtph265depay->output_format = stream_format;
269 GST_DEBUG_OBJECT (rtph265depay, "defaulting to output stream-format %s",
270 stream_format_get_nick (DEFAULT_STREAM_FORMAT));
271 rtph265depay->stream_format =
272 stream_format_get_nick (DEFAULT_STREAM_FORMAT);
273 rtph265depay->output_format = DEFAULT_STREAM_FORMAT;
275 rtph265depay->byte_stream =
276 (rtph265depay->output_format == GST_H265_STREAM_FORMAT_BYTESTREAM);
279 GST_DEBUG_OBJECT (rtph265depay, "downstream requires merge %d", merge);
280 rtph265depay->merge = merge;
282 GST_DEBUG_OBJECT (rtph265depay, "defaulting to merge %d",
283 DEFAULT_ACCESS_UNIT);
284 rtph265depay->merge = DEFAULT_ACCESS_UNIT;
289 parse_sps (GstMapInfo * map, guint32 * sps_id)
290 { /* To parse seq_parameter_set_id */
291 GstBitReader br = GST_BIT_READER_INIT (map->data + 15,
294 GST_MEMDUMP ("SPS", map->data, map->size);
299 if (!gst_rtp_read_golomb (&br, sps_id))
306 parse_pps (GstMapInfo * map, guint32 * sps_id, guint32 * pps_id)
307 { /* To parse picture_parameter_set_id */
308 GstBitReader br = GST_BIT_READER_INIT (map->data + 2,
311 GST_MEMDUMP ("PPS", map->data, map->size);
316 if (!gst_rtp_read_golomb (&br, pps_id))
318 if (!gst_rtp_read_golomb (&br, sps_id))
325 gst_rtp_h265_depay_set_output_caps (GstRtpH265Depay * rtph265depay,
328 GstAllocationParams params;
329 GstAllocator *allocator = NULL;
333 gst_allocation_params_init (¶ms);
335 srcpad = GST_RTP_BASE_DEPAYLOAD_SRCPAD (rtph265depay);
337 res = gst_pad_set_caps (srcpad, caps);
342 query = gst_query_new_allocation (caps, TRUE);
343 if (!gst_pad_peer_query (srcpad, query)) {
344 GST_DEBUG_OBJECT (rtph265depay, "downstream ALLOCATION query failed");
347 if (gst_query_get_n_allocation_params (query) > 0) {
348 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
351 gst_query_unref (query);
354 if (rtph265depay->allocator)
355 gst_object_unref (rtph265depay->allocator);
357 rtph265depay->allocator = allocator;
358 rtph265depay->params = params;
364 gst_rtp_h265_set_src_caps (GstRtpH265Depay * rtph265depay)
366 gboolean res, update_caps;
371 if (!rtph265depay->byte_stream &&
372 (!rtph265depay->new_codec_data ||
373 rtph265depay->vps->len == 0 || rtph265depay->sps->len == 0
374 || rtph265depay->pps->len == 0))
377 srccaps = gst_caps_new_simple ("video/x-h265",
378 "stream-format", G_TYPE_STRING, rtph265depay->stream_format,
379 "alignment", G_TYPE_STRING, rtph265depay->merge ? "au" : "nal", NULL);
381 if (!rtph265depay->byte_stream) {
382 GstBuffer *codec_data;
385 guint num_vps = rtph265depay->vps->len;
386 guint num_sps = rtph265depay->sps->len;
387 guint num_pps = rtph265depay->pps->len;
388 GstMapInfo map, nalmap;
390 guint8 num_arrays = 0;
395 guint32 max_sub_layers_minus1, temporal_id_nesting_flag, chroma_format_idc,
396 bit_depth_luma_minus8, bit_depth_chroma_minus8,
397 min_spatial_segmentation_idc;
399 /* Fixme: Current implementation is not embedding SEI in codec_data */
404 /* start with 23 bytes header */
407 num_arrays = (num_vps > 0) + (num_sps > 0) + (num_pps > 0);
408 len += 3 * num_arrays;
410 /* add size of vps, sps & pps */
411 for (i = 0; i < num_vps; i++)
412 len += 2 + gst_buffer_get_size (g_ptr_array_index (rtph265depay->vps, i));
413 for (i = 0; i < num_sps; i++)
414 len += 2 + gst_buffer_get_size (g_ptr_array_index (rtph265depay->sps, i));
415 for (i = 0; i < num_pps; i++)
416 len += 2 + gst_buffer_get_size (g_ptr_array_index (rtph265depay->pps, i));
418 GST_DEBUG_OBJECT (rtph265depay,
419 "constructing codec_data: num_vps =%d num_sps=%d, num_pps=%d", num_vps,
422 codec_data = gst_buffer_new_and_alloc (len);
423 gst_buffer_map (codec_data, &map, GST_MAP_READWRITE);
426 memset (data, 0, map.size);
428 /* Parsing sps to get the info required further on */
430 gst_buffer_map (g_ptr_array_index (rtph265depay->sps, 0), &nalmap,
433 max_sub_layers_minus1 = ((nalmap.data[2]) >> 1) & 0x07;
434 temporal_id_nesting_flag = nalmap.data[2] & 0x01;
436 gst_bit_reader_init (&br, nalmap.data + 15, nalmap.size - 15);
438 gst_rtp_read_golomb (&br, &tmp); /* sps_seq_parameter_set_id */
439 gst_rtp_read_golomb (&br, &chroma_format_idc); /* chroma_format_idc */
441 if (chroma_format_idc == 3)
443 gst_bit_reader_get_bits_uint8 (&br, &tmp8, 1); /* separate_colour_plane_flag */
445 gst_rtp_read_golomb (&br, &tmp); /* pic_width_in_luma_samples */
446 gst_rtp_read_golomb (&br, &tmp); /* pic_height_in_luma_samples */
448 gst_bit_reader_get_bits_uint8 (&br, &tmp8, 1); /* conformance_window_flag */
450 gst_rtp_read_golomb (&br, &tmp); /* conf_win_left_offset */
451 gst_rtp_read_golomb (&br, &tmp); /* conf_win_right_offset */
452 gst_rtp_read_golomb (&br, &tmp); /* conf_win_top_offset */
453 gst_rtp_read_golomb (&br, &tmp); /* conf_win_bottom_offset */
456 gst_rtp_read_golomb (&br, &bit_depth_luma_minus8); /* bit_depth_luma_minus8 */
457 gst_rtp_read_golomb (&br, &bit_depth_chroma_minus8); /* bit_depth_chroma_minus8 */
459 GST_DEBUG_OBJECT (rtph265depay,
460 "Ignoring min_spatial_segmentation for now (assuming zero)");
462 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 */
464 gst_buffer_unmap (g_ptr_array_index (rtph265depay->sps, 0), &nalmap);
466 /* HEVCDecoderConfigurationVersion = 1 */
469 /* Copy from profile_tier_level (Rec. ITU-T H.265 (04/2013) section 7.3.3
471 * profile_space | tier_flat | profile_idc |
472 * profile_compatibility_flags | constraint_indicator_flags |
473 * level_idc | progressive_source_flag | interlaced_source_flag
474 * non_packed_constraint_flag | frame_only_constraint_flag
475 * reserved_zero_44bits | level_idc */
476 gst_buffer_map (g_ptr_array_index (rtph265depay->sps, 0), &nalmap,
478 for (i = 0; i < 12; i++)
479 data[i + 1] = nalmap.data[i];
480 gst_buffer_unmap (g_ptr_array_index (rtph265depay->sps, 0), &nalmap);
482 /* min_spatial_segmentation_idc */
483 GST_WRITE_UINT16_BE (data + 13, min_spatial_segmentation_idc);
485 data[15] = 0xfc; /* keeping parrallelismType as zero (unknown) */
486 data[16] = 0xfc | chroma_format_idc;
487 data[17] = 0xf8 | bit_depth_luma_minus8;
488 data[18] = 0xf8 | bit_depth_chroma_minus8;
489 data[19] = 0x00; /* keep avgFrameRate as unspecified */
490 data[20] = 0x00; /* keep avgFrameRate as unspecified */
491 /* constFrameRate(2 bits): 0, stream may or may not be of constant framerate
492 * numTemporalLayers (3 bits): number of temporal layers, value from SPS
493 * TemporalIdNested (1 bit): sps_temporal_id_nesting_flag from SPS
494 * lengthSizeMinusOne (2 bits): plus 1 indicates the length of the NALUnitLength */
495 /* we always output NALs with 4-byte nal unit length markers (or sync code) */
496 data[21] = rtph265depay->byte_stream ? 0x00 : 0x03;
497 data[21] |= ((max_sub_layers_minus1 + 1) << 3);
498 data[21] |= (temporal_id_nesting_flag << 2);
499 GST_WRITE_UINT8 (data + 22, num_arrays); /* numOfArrays */
505 /* array_completeness | reserved_zero bit | nal_unit_type */
506 data[0] = 0x00 | 0x20;
509 GST_WRITE_UINT16_BE (data, num_vps);
512 for (i = 0; i < num_vps; i++) {
514 gst_buffer_get_size (g_ptr_array_index (rtph265depay->vps, i));
515 GST_WRITE_UINT16_BE (data, nal_size);
516 gst_buffer_extract (g_ptr_array_index (rtph265depay->vps, i), 0,
518 data += 2 + nal_size;
519 GST_DEBUG_OBJECT (rtph265depay, "Copied VPS %d of length %u", i,
526 /* array_completeness | reserved_zero bit | nal_unit_type */
527 data[0] = 0x00 | 0x21;
530 GST_WRITE_UINT16_BE (data, num_sps);
533 for (i = 0; i < num_sps; i++) {
535 gst_buffer_get_size (g_ptr_array_index (rtph265depay->sps, i));
536 GST_WRITE_UINT16_BE (data, nal_size);
537 gst_buffer_extract (g_ptr_array_index (rtph265depay->sps, i), 0,
539 data += 2 + nal_size;
540 GST_DEBUG_OBJECT (rtph265depay, "Copied SPS %d of length %u", i,
547 /* array_completeness | reserved_zero bit | nal_unit_type */
548 data[0] = 0x00 | 0x22;
551 GST_WRITE_UINT16_BE (data, num_pps);
554 for (i = 0; i < num_pps; i++) {
556 gst_buffer_get_size (g_ptr_array_index (rtph265depay->pps, i));
557 GST_WRITE_UINT16_BE (data, nal_size);
558 gst_buffer_extract (g_ptr_array_index (rtph265depay->pps, i), 0,
560 data += 2 + nal_size;
561 GST_DEBUG_OBJECT (rtph265depay, "Copied PPS %d of length %u", i,
566 new_size = data - map.data;
567 gst_buffer_unmap (codec_data, &map);
568 gst_buffer_set_size (codec_data, new_size);
570 gst_caps_set_simple (srccaps,
571 "codec_data", GST_TYPE_BUFFER, codec_data, NULL);
572 gst_buffer_unref (codec_data);
575 srcpad = GST_RTP_BASE_DEPAYLOAD_SRCPAD (rtph265depay);
577 old_caps = gst_pad_get_current_caps (srcpad);
578 if (old_caps != NULL) {
580 /* Only update the caps if they are not equal. For
581 * AVC we don't update caps if only the codec_data
582 * changes. This is the same behaviour as in h264parse
583 * and gstrtph264depay
585 if (rtph265depay->byte_stream) {
586 update_caps = !gst_caps_is_equal (srccaps, old_caps);
588 GstCaps *tmp_caps = gst_caps_copy (srccaps);
589 GstStructure *old_s, *tmp_s;
591 old_s = gst_caps_get_structure (old_caps, 0);
592 tmp_s = gst_caps_get_structure (tmp_caps, 0);
593 if (gst_structure_has_field (old_s, "codec_data"))
594 gst_structure_set_value (tmp_s, "codec_data",
595 gst_structure_get_value (old_s, "codec_data"));
597 update_caps = !gst_caps_is_equal (old_caps, tmp_caps);
598 gst_caps_unref (tmp_caps);
600 gst_caps_unref (old_caps);
606 res = gst_rtp_h265_depay_set_output_caps (rtph265depay, srccaps);
611 gst_caps_unref (srccaps);
613 /* Insert SPS and PPS into the stream on next opportunity */
614 if (rtph265depay->output_format != GST_H265_STREAM_FORMAT_HVC1
615 && (rtph265depay->sps->len > 0 || rtph265depay->pps->len > 0)) {
617 GstBuffer *codec_data;
622 for (i = 0; i < rtph265depay->sps->len; i++) {
623 len += 4 + gst_buffer_get_size (g_ptr_array_index (rtph265depay->sps, i));
626 for (i = 0; i < rtph265depay->pps->len; i++) {
627 len += 4 + gst_buffer_get_size (g_ptr_array_index (rtph265depay->pps, i));
630 codec_data = gst_buffer_new_and_alloc (len);
631 gst_buffer_map (codec_data, &map, GST_MAP_WRITE);
634 for (i = 0; i < rtph265depay->sps->len; i++) {
635 GstBuffer *sps_buf = g_ptr_array_index (rtph265depay->sps, i);
636 guint sps_size = gst_buffer_get_size (sps_buf);
638 if (rtph265depay->byte_stream)
639 memcpy (data, sync_bytes, sizeof (sync_bytes));
641 GST_WRITE_UINT32_BE (data, sps_size);
642 gst_buffer_extract (sps_buf, 0, data + 4, -1);
643 data += 4 + sps_size;
646 for (i = 0; i < rtph265depay->pps->len; i++) {
647 GstBuffer *pps_buf = g_ptr_array_index (rtph265depay->pps, i);
648 guint pps_size = gst_buffer_get_size (pps_buf);
650 if (rtph265depay->byte_stream)
651 memcpy (data, sync_bytes, sizeof (sync_bytes));
653 GST_WRITE_UINT32_BE (data, pps_size);
654 gst_buffer_extract (pps_buf, 0, data + 4, -1);
655 data += 4 + pps_size;
658 gst_buffer_unmap (codec_data, &map);
659 if (rtph265depay->codec_data)
660 gst_buffer_unref (rtph265depay->codec_data);
661 rtph265depay->codec_data = codec_data;
665 rtph265depay->new_codec_data = FALSE;
671 gst_rtp_h265_add_vps_sps_pps (GstElement * rtph265, GPtrArray * vps_array,
672 GPtrArray * sps_array, GPtrArray * pps_array, GstBuffer * nal)
678 gst_buffer_map (nal, &map, GST_MAP_READ);
680 type = (map.data[0] >> 1) & 0x3f;
682 if (type == GST_H265_VPS_NUT) {
683 guint32 vps_id = (map.data[2] >> 4) & 0x0f;
685 for (i = 0; i < vps_array->len; i++) {
686 GstBuffer *vps = g_ptr_array_index (vps_array, i);
690 gst_buffer_map (vps, &vpsmap, GST_MAP_READ);
691 tmp_vps_id = (vpsmap.data[2] >> 4) & 0x0f;
693 if (vps_id == tmp_vps_id) {
694 if (map.size == vpsmap.size &&
695 memcmp (map.data, vpsmap.data, vpsmap.size) == 0) {
696 GST_LOG_OBJECT (rtph265, "Unchanged VPS %u, not updating", vps_id);
697 gst_buffer_unmap (vps, &vpsmap);
700 gst_buffer_unmap (vps, &vpsmap);
701 g_ptr_array_remove_index_fast (vps_array, i);
702 g_ptr_array_add (vps_array, nal);
703 GST_LOG_OBJECT (rtph265, "Modified VPS %u, replacing", vps_id);
707 gst_buffer_unmap (vps, &vpsmap);
709 GST_LOG_OBJECT (rtph265, "Adding new VPS %u", vps_id);
710 g_ptr_array_add (vps_array, nal);
711 } else if (type == GST_H265_SPS_NUT) {
714 if (!parse_sps (&map, &sps_id)) {
715 GST_WARNING_OBJECT (rtph265, "Invalid SPS,"
716 " can't parse seq_parameter_set_id");
720 for (i = 0; i < sps_array->len; i++) {
721 GstBuffer *sps = g_ptr_array_index (sps_array, i);
725 gst_buffer_map (sps, &spsmap, GST_MAP_READ);
726 parse_sps (&spsmap, &tmp_sps_id);
728 if (sps_id == tmp_sps_id) {
729 if (map.size == spsmap.size &&
730 memcmp (map.data, spsmap.data, spsmap.size) == 0) {
731 GST_LOG_OBJECT (rtph265, "Unchanged SPS %u, not updating", sps_id);
732 gst_buffer_unmap (sps, &spsmap);
735 gst_buffer_unmap (sps, &spsmap);
736 g_ptr_array_remove_index_fast (sps_array, i);
737 g_ptr_array_add (sps_array, nal);
738 GST_LOG_OBJECT (rtph265, "Modified SPS %u, replacing", sps_id);
742 gst_buffer_unmap (sps, &spsmap);
744 GST_LOG_OBJECT (rtph265, "Adding new SPS %u", sps_id);
745 g_ptr_array_add (sps_array, nal);
746 } else if (type == GST_H265_PPS_NUT) {
750 if (!parse_pps (&map, &sps_id, &pps_id)) {
751 GST_WARNING_OBJECT (rtph265, "Invalid PPS,"
752 " can't parse seq_parameter_set_id or pic_parameter_set_id");
756 for (i = 0; i < pps_array->len; i++) {
757 GstBuffer *pps = g_ptr_array_index (pps_array, i);
763 gst_buffer_map (pps, &ppsmap, GST_MAP_READ);
764 parse_pps (&ppsmap, &tmp_sps_id, &tmp_pps_id);
766 if (pps_id == tmp_pps_id) {
767 if (map.size == ppsmap.size &&
768 memcmp (map.data, ppsmap.data, ppsmap.size) == 0) {
769 GST_LOG_OBJECT (rtph265, "Unchanged PPS %u:%u, not updating", sps_id,
771 gst_buffer_unmap (pps, &ppsmap);
774 gst_buffer_unmap (pps, &ppsmap);
775 g_ptr_array_remove_index_fast (pps_array, i);
776 g_ptr_array_add (pps_array, nal);
777 GST_LOG_OBJECT (rtph265, "Modified PPS %u:%u, replacing",
782 gst_buffer_unmap (pps, &ppsmap);
784 GST_LOG_OBJECT (rtph265, "Adding new PPS %u:%i", sps_id, pps_id);
785 g_ptr_array_add (pps_array, nal);
791 gst_buffer_unmap (nal, &map);
796 gst_buffer_unmap (nal, &map);
797 gst_buffer_unref (nal);
804 gst_rtp_h265_depay_add_vps_sps_pps (GstRtpH265Depay * rtph265depay,
807 if (gst_rtp_h265_add_vps_sps_pps (GST_ELEMENT (rtph265depay),
808 rtph265depay->vps, rtph265depay->sps, rtph265depay->pps, nal))
809 rtph265depay->new_codec_data = TRUE;
813 gst_rtp_h265_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
816 GstStructure *structure = gst_caps_get_structure (caps, 0);
817 GstRtpH265Depay *rtph265depay;
825 rtph265depay = GST_RTP_H265_DEPAY (depayload);
827 if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
829 depayload->clock_rate = clock_rate;
831 /* Base64 encoded, comma separated config NALs */
832 vps = gst_structure_get_string (structure, "sprop-vps");
833 sps = gst_structure_get_string (structure, "sprop-sps");
834 pps = gst_structure_get_string (structure, "sprop-pps");
835 if (vps == NULL || sps == NULL || pps == NULL) {
838 ps = g_strdup_printf ("%s,%s,%s", vps, sps, pps);
841 /* negotiate with downstream w.r.t. output format and alignment */
842 gst_rtp_h265_depay_negotiate (rtph265depay);
844 if (rtph265depay->byte_stream && ps != NULL) {
845 /* for bytestream we only need the parameter sets but we don't error out
846 * when they are not there, we assume they are in the stream. */
848 GstBuffer *codec_data;
852 params = g_strsplit (ps, ",", 0);
854 /* count total number of bytes in base64. Also include the sync bytes in
855 * front of the params. */
857 for (i = 0; params[i]; i++) {
858 len += strlen (params[i]);
859 len += sizeof (sync_bytes);
861 /* we seriously overshoot the length, but it's fine. */
862 codec_data = gst_buffer_new_and_alloc (len);
864 gst_buffer_map (codec_data, &map, GST_MAP_WRITE);
867 for (i = 0; params[i]; i++) {
871 GST_DEBUG_OBJECT (depayload, "decoding param %d (%s)", i, params[i]);
872 memcpy (ptr, sync_bytes, sizeof (sync_bytes));
873 ptr += sizeof (sync_bytes);
875 g_base64_decode_step (params[i], strlen (params[i]), ptr, &state,
877 GST_DEBUG_OBJECT (depayload, "decoded %d bytes", len);
878 total += len + sizeof (sync_bytes);
881 gst_buffer_unmap (codec_data, &map);
882 gst_buffer_resize (codec_data, 0, total);
885 /* keep the codec_data, we need to send it as the first buffer. We cannot
886 * push it in the adapter because the adapter might be flushed on discont.
888 if (rtph265depay->codec_data)
889 gst_buffer_unref (rtph265depay->codec_data);
890 rtph265depay->codec_data = codec_data;
891 } else if (!rtph265depay->byte_stream) {
896 goto incomplete_caps;
898 params = g_strsplit (ps, ",", 0);
900 GST_DEBUG_OBJECT (depayload, "we have %d params", g_strv_length (params));
902 /* start with 23 bytes header */
903 for (i = 0; params[i]; i++) {
910 nal_len = strlen (params[i]);
912 GST_WARNING_OBJECT (depayload, "empty param '%s' (#%d)", params[i], i);
915 nal = gst_buffer_new_and_alloc (nal_len);
916 gst_buffer_map (nal, &nalmap, GST_MAP_READWRITE);
919 g_base64_decode_step (params[i], nal_len, nalmap.data, &state, &save);
921 GST_DEBUG_OBJECT (depayload, "adding param %d as %s", i,
922 (((nalmap.data[0] >> 1) & 0x3f) ==
923 32) ? "VPS" : (((nalmap.data[0] >> 1) & 0x3f) ==
924 33) ? "SPS" : "PPS");
926 gst_buffer_unmap (nal, &nalmap);
927 gst_buffer_set_size (nal, nal_len);
929 gst_rtp_h265_depay_add_vps_sps_pps (rtph265depay, nal);
933 if (rtph265depay->vps->len == 0 || rtph265depay->sps->len == 0 ||
934 rtph265depay->pps->len == 0) {
935 goto incomplete_caps;
941 return gst_rtp_h265_set_src_caps (rtph265depay);
946 GST_DEBUG_OBJECT (depayload, "we have incomplete caps,"
947 " doing setcaps later");
954 gst_rtp_h265_depay_allocate_output_buffer (GstRtpH265Depay * depay, gsize size)
956 GstBuffer *buffer = NULL;
958 g_return_val_if_fail (size > 0, NULL);
960 GST_LOG_OBJECT (depay, "want output buffer of %u bytes", (guint) size);
962 buffer = gst_buffer_new_allocate (depay->allocator, size, &depay->params);
963 if (buffer == NULL) {
964 GST_INFO_OBJECT (depay, "couldn't allocate output buffer");
965 buffer = gst_buffer_new_allocate (NULL, size, NULL);
972 gst_rtp_h265_complete_au (GstRtpH265Depay * rtph265depay,
973 GstClockTime * out_timestamp, gboolean * out_keyframe)
978 guint outsize, offset = 0;
979 gint b, n_bufs, m, n_mem;
981 /* we had a picture in the adapter and we completed it */
982 GST_DEBUG_OBJECT (rtph265depay, "taking completed AU");
983 outsize = gst_adapter_available (rtph265depay->picture_adapter);
985 outbuf = gst_rtp_h265_depay_allocate_output_buffer (rtph265depay, outsize);
990 if (!gst_buffer_map (outbuf, &outmap, GST_MAP_WRITE))
993 list = gst_adapter_take_buffer_list (rtph265depay->picture_adapter, outsize);
995 n_bufs = gst_buffer_list_length (list);
996 for (b = 0; b < n_bufs; ++b) {
997 GstBuffer *buf = gst_buffer_list_get (list, b);
999 n_mem = gst_buffer_n_memory (buf);
1000 for (m = 0; m < n_mem; ++m) {
1001 GstMemory *mem = gst_buffer_peek_memory (buf, m);
1002 gsize mem_size = gst_memory_get_sizes (mem, NULL, NULL);
1005 if (gst_memory_map (mem, &mem_map, GST_MAP_READ)) {
1006 memcpy (outmap.data + offset, mem_map.data, mem_size);
1007 gst_memory_unmap (mem, &mem_map);
1009 memset (outmap.data + offset, 0, mem_size);
1014 gst_rtp_copy_video_meta (rtph265depay, outbuf, buf);
1016 gst_buffer_list_unref (list);
1017 gst_buffer_unmap (outbuf, &outmap);
1019 *out_timestamp = rtph265depay->last_ts;
1020 *out_keyframe = rtph265depay->last_keyframe;
1022 rtph265depay->last_keyframe = FALSE;
1023 rtph265depay->picture_start = FALSE;
1028 /* VPS/SPS/PPS/RADL/TSA/RASL/IDR/CRA is considered key, all others DELTA;
1029 * so downstream waiting for keyframe can pick up at VPS/SPS/PPS/IDR */
1031 #define NAL_TYPE_IS_PARAMETER_SET(nt) ( ((nt) == GST_H265_VPS_NUT)\
1032 || ((nt) == GST_H265_SPS_NUT)\
1033 || ((nt) == GST_H265_PPS_NUT) )
1035 #define NAL_TYPE_IS_CODED_SLICE_SEGMENT(nt) ( ((nt) == GST_H265_NAL_SLICE_TRAIL_N)\
1036 || ((nt) == GST_H265_NAL_SLICE_TRAIL_R)\
1037 || ((nt) == GST_H265_NAL_SLICE_TSA_N)\
1038 || ((nt) == GST_H265_NAL_SLICE_TSA_R)\
1039 || ((nt) == GST_H265_NAL_SLICE_STSA_N)\
1040 || ((nt) == GST_H265_NAL_SLICE_STSA_R)\
1041 || ((nt) == GST_H265_NAL_SLICE_RASL_N)\
1042 || ((nt) == GST_H265_NAL_SLICE_RASL_R)\
1043 || ((nt) == GST_H265_NAL_SLICE_BLA_W_LP)\
1044 || ((nt) == GST_H265_NAL_SLICE_BLA_W_RADL)\
1045 || ((nt) == GST_H265_NAL_SLICE_BLA_N_LP)\
1046 || ((nt) == GST_H265_NAL_SLICE_IDR_W_RADL)\
1047 || ((nt) == GST_H265_NAL_SLICE_IDR_N_LP)\
1048 || ((nt) == GST_H265_NAL_SLICE_CRA_NUT) )
1050 /* Intra random access point */
1051 #define NAL_TYPE_IS_IRAP(nt) (((nt) == GST_H265_NAL_SLICE_BLA_W_LP) \
1052 || ((nt) == GST_H265_NAL_SLICE_BLA_W_RADL) \
1053 || ((nt) == GST_H265_NAL_SLICE_BLA_N_LP) \
1054 || ((nt) == GST_H265_NAL_SLICE_IDR_W_RADL) \
1055 || ((nt) == GST_H265_NAL_SLICE_IDR_N_LP) \
1056 || ((nt) == GST_H265_NAL_SLICE_CRA_NUT))
1058 #define NAL_TYPE_IS_KEY(nt) (NAL_TYPE_IS_PARAMETER_SET(nt) || NAL_TYPE_IS_IRAP(nt))
1061 gst_rtp_h265_depay_handle_nal (GstRtpH265Depay * rtph265depay, GstBuffer * nal,
1062 GstClockTime in_timestamp, gboolean marker)
1064 GstRTPBaseDepayload *depayload = GST_RTP_BASE_DEPAYLOAD (rtph265depay);
1067 GstBuffer *outbuf = NULL;
1068 GstClockTime out_timestamp;
1069 gboolean keyframe, out_keyframe;
1071 gst_buffer_map (nal, &map, GST_MAP_READ);
1072 if (G_UNLIKELY (map.size < 5))
1075 nal_type = (map.data[4] >> 1) & 0x3f;
1076 GST_DEBUG_OBJECT (rtph265depay, "handle NAL type %d (RTP marker bit %d)",
1079 keyframe = NAL_TYPE_IS_KEY (nal_type);
1081 out_keyframe = keyframe;
1082 out_timestamp = in_timestamp;
1084 if (!rtph265depay->byte_stream) {
1085 if (NAL_TYPE_IS_PARAMETER_SET (nal_type)) {
1086 gst_rtp_h265_depay_add_vps_sps_pps (rtph265depay,
1087 gst_buffer_copy_region (nal, GST_BUFFER_COPY_ALL,
1088 4, gst_buffer_get_size (nal) - 4));
1089 gst_buffer_unmap (nal, &map);
1090 gst_buffer_unref (nal);
1092 } else if (rtph265depay->sps->len == 0 || rtph265depay->pps->len == 0) {
1093 /* Down push down any buffer in non-bytestream mode if the SPS/PPS haven't
1096 gst_pad_push_event (GST_RTP_BASE_DEPAYLOAD_SINKPAD (depayload),
1097 gst_event_new_custom (GST_EVENT_CUSTOM_UPSTREAM,
1098 gst_structure_new ("GstForceKeyUnit",
1099 "all-headers", G_TYPE_BOOLEAN, TRUE, NULL)));
1100 gst_buffer_unmap (nal, &map);
1101 gst_buffer_unref (nal);
1105 if (rtph265depay->new_codec_data &&
1106 rtph265depay->sps->len > 0 && rtph265depay->pps->len > 0)
1107 gst_rtp_h265_set_src_caps (rtph265depay);
1110 if (rtph265depay->merge) {
1111 gboolean start = FALSE, complete = FALSE;
1113 /* marker bit isn't mandatory so in the following code we try to detect
1114 * an AU boundary (see H.265 spec section 7.4.2.4.4) */
1116 if (NAL_TYPE_IS_CODED_SLICE_SEGMENT (nal_type)) {
1117 /* 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 */
1119 if (((map.data[6] >> 7) & 0x01) == 1) {
1122 } else if ((nal_type >= 32 && nal_type <= 35)
1123 || nal_type == 39 || (nal_type >= 41 && nal_type <= 44)
1124 || (nal_type >= 48 && nal_type <= 55)) {
1125 /* VPS, SPS, PPS, SEI, ... terminate an access unit */
1128 GST_DEBUG_OBJECT (depayload, "start %d, complete %d", start, complete);
1130 if (complete && rtph265depay->picture_start)
1131 outbuf = gst_rtp_h265_complete_au (rtph265depay, &out_timestamp,
1134 /* add to adapter */
1135 gst_buffer_unmap (nal, &map);
1137 GST_DEBUG_OBJECT (depayload, "adding NAL to picture adapter");
1138 gst_adapter_push (rtph265depay->picture_adapter, nal);
1139 rtph265depay->last_ts = in_timestamp;
1140 rtph265depay->last_keyframe |= keyframe;
1141 rtph265depay->picture_start |= start;
1144 outbuf = gst_rtp_h265_complete_au (rtph265depay, &out_timestamp,
1147 /* no merge, output is input nal */
1148 GST_DEBUG_OBJECT (depayload, "using NAL as output");
1150 gst_buffer_unmap (nal, &map);
1154 /* prepend codec_data */
1155 if (rtph265depay->codec_data) {
1156 GST_DEBUG_OBJECT (depayload, "prepending codec_data");
1157 gst_rtp_copy_video_meta (rtph265depay, rtph265depay->codec_data, outbuf);
1158 outbuf = gst_buffer_append (rtph265depay->codec_data, outbuf);
1159 rtph265depay->codec_data = NULL;
1160 out_keyframe = TRUE;
1162 outbuf = gst_buffer_make_writable (outbuf);
1164 gst_rtp_drop_non_video_meta (rtph265depay, outbuf);
1166 GST_BUFFER_PTS (outbuf) = out_timestamp;
1169 GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
1171 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
1173 gst_rtp_base_depayload_push (depayload, outbuf);
1181 GST_WARNING_OBJECT (depayload, "dropping short NAL");
1182 gst_buffer_unmap (nal, &map);
1183 gst_buffer_unref (nal);
1189 gst_rtp_h265_finish_fragmentation_unit (GstRtpH265Depay * rtph265depay)
1195 outsize = gst_adapter_available (rtph265depay->adapter);
1196 g_assert (outsize >= 4);
1198 outbuf = gst_adapter_take_buffer (rtph265depay->adapter, outsize);
1200 gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
1201 GST_DEBUG_OBJECT (rtph265depay, "output %d bytes", outsize);
1203 if (rtph265depay->byte_stream) {
1204 memcpy (map.data, sync_bytes, sizeof (sync_bytes));
1206 GST_WRITE_UINT32_BE (map.data, outsize - 4);
1208 gst_buffer_unmap (outbuf, &map);
1210 rtph265depay->current_fu_type = 0;
1212 gst_rtp_h265_depay_handle_nal (rtph265depay, outbuf,
1213 rtph265depay->fu_timestamp, rtph265depay->fu_marker);
1217 gst_rtp_h265_depay_process (GstRTPBaseDepayload * depayload, GstRTPBuffer * rtp)
1219 GstRtpH265Depay *rtph265depay;
1220 GstBuffer *outbuf = NULL;
1221 guint8 nal_unit_type;
1223 rtph265depay = GST_RTP_H265_DEPAY (depayload);
1225 /* flush remaining data on discont */
1226 if (GST_BUFFER_IS_DISCONT (rtp->buffer)) {
1227 gst_adapter_clear (rtph265depay->adapter);
1228 rtph265depay->wait_start = TRUE;
1229 rtph265depay->current_fu_type = 0;
1237 guint outsize, nalu_size;
1238 GstClockTime timestamp;
1240 guint8 nuh_layer_id, nuh_temporal_id_plus1;
1244 gboolean donl_present = FALSE;
1247 timestamp = GST_BUFFER_PTS (rtp->buffer);
1249 payload_len = gst_rtp_buffer_get_payload_len (rtp);
1250 payload = gst_rtp_buffer_get_payload (rtp);
1251 marker = gst_rtp_buffer_get_marker (rtp);
1253 GST_DEBUG_OBJECT (rtph265depay, "receiving %d bytes", payload_len);
1255 if (payload_len == 0)
1258 /* +---------------+---------------+
1259 * |0|1|2|3|4|5|6|7|0|1|2|3|4|5|6|7|
1260 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1261 * |F| Type | LayerId | TID |
1262 * +-------------+-----------------+
1267 nal_unit_type = (payload[0] >> 1) & 0x3f;
1268 nuh_layer_id = ((payload[0] & 0x01) << 5) | (payload[1] >> 3); /* should be zero for now but this could change in future HEVC extensions */
1269 nuh_temporal_id_plus1 = payload[1] & 0x03;
1271 /* At least two byte header with type */
1274 GST_DEBUG_OBJECT (rtph265depay,
1275 "NAL header nal_unit_type %d, nuh_temporal_id_plus1 %d", nal_unit_type,
1276 nuh_temporal_id_plus1);
1278 GST_FIXME_OBJECT (rtph265depay, "Assuming DONL field is not present");
1280 /* FIXME - assuming DONL field is not present for now */
1281 /*donl_present = (tx-mode == "MST") || (sprop-max-don-diff > 0); */
1283 /* If FU unit was being processed, but the current nal is of a different
1284 * type. Assume that the remote payloader is buggy (didn't set the end bit
1285 * when the FU ended) and send out what we gathered thusfar */
1286 if (G_UNLIKELY (rtph265depay->current_fu_type != 0 &&
1287 nal_unit_type != rtph265depay->current_fu_type))
1288 gst_rtp_h265_finish_fragmentation_unit (rtph265depay);
1290 switch (nal_unit_type) {
1293 GST_DEBUG_OBJECT (rtph265depay, "Processing aggregation packet");
1295 /* Aggregation packet (section 4.7) */
1297 /* An example of an AP packet containing two aggregation units
1298 without the DONL and DOND fields
1301 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
1302 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1304 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1305 | PayloadHdr (Type=48) | NALU 1 Size |
1306 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1308 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ NALU 1 Data |
1311 + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1312 | . . . | NALU 2 Size | NALU 2 HDR |
1313 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1315 +-+-+-+-+-+-+-+-+ NALU 2 Data |
1317 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1318 | :...OPTIONAL RTP padding |
1319 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1323 payload += header_len;
1324 payload_len -= header_len;
1326 rtph265depay->wait_start = FALSE;
1330 goto not_implemented_donl_present;
1333 while (payload_len > 2) {
1335 nalu_size = (payload[0] << 8) | payload[1];
1337 /* dont include nalu_size */
1338 if (nalu_size > (payload_len - 2))
1339 nalu_size = payload_len - 2;
1341 outsize = nalu_size + sizeof (sync_bytes);
1342 outbuf = gst_buffer_new_and_alloc (outsize);
1344 gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
1345 if (rtph265depay->byte_stream) {
1346 memcpy (map.data, sync_bytes, sizeof (sync_bytes));
1348 GST_WRITE_UINT32_BE (map.data, nalu_size);
1351 /* strip NALU size */
1355 memcpy (map.data + sizeof (sync_bytes), payload, nalu_size);
1356 gst_buffer_unmap (outbuf, &map);
1358 gst_rtp_copy_video_meta (rtph265depay, outbuf, rtp->buffer);
1360 gst_rtp_h265_depay_handle_nal (rtph265depay, outbuf, timestamp,
1363 payload += nalu_size;
1364 payload_len -= nalu_size;
1370 GST_DEBUG_OBJECT (rtph265depay, "Processing Fragmentation Unit");
1372 /* Fragmentation units (FUs) Section 4.8 */
1374 /* The structure of a Fragmentation Unit (FU)
1376 * 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
1377 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1378 | PayloadHdr (Type=49) | FU header | DONL (cond) |
1379 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
1384 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1385 | :...OPTIONAL RTP padding |
1386 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1392 payload += header_len;
1393 payload_len -= header_len;
1395 /* processing FU header */
1396 S = (payload[0] & 0x80) == 0x80;
1397 E = (payload[0] & 0x40) == 0x40;
1399 GST_DEBUG_OBJECT (rtph265depay,
1400 "FU header with S %d, E %d, nal_unit_type %d", S, E,
1403 if (rtph265depay->wait_start && !S)
1408 goto not_implemented_donl_present;
1413 GST_DEBUG_OBJECT (rtph265depay, "Start of Fragmentation Unit");
1415 /* If a new FU unit started, while still processing an older one.
1416 * Assume that the remote payloader is buggy (doesn't set the end
1417 * bit) and send out what we've gathered thusfar */
1418 if (G_UNLIKELY (rtph265depay->current_fu_type != 0))
1419 gst_rtp_h265_finish_fragmentation_unit (rtph265depay);
1421 rtph265depay->current_fu_type = nal_unit_type;
1422 rtph265depay->fu_timestamp = timestamp;
1424 rtph265depay->wait_start = FALSE;
1426 /* reconstruct NAL header */
1428 ((payload[0] & 0x3f) << 9) | (nuh_layer_id << 3) |
1429 nuh_temporal_id_plus1;
1431 /* go back one byte so we can copy the payload + two bytes more in the front which
1432 * will be overwritten by the nal_header
1437 nalu_size = payload_len;
1438 outsize = nalu_size + sizeof (sync_bytes);
1439 outbuf = gst_buffer_new_and_alloc (outsize);
1441 gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
1442 if (rtph265depay->byte_stream) {
1443 GST_WRITE_UINT32_BE (map.data, 0x00000001);
1445 /* will be fixed up in finish_fragmentation_unit() */
1446 GST_WRITE_UINT32_BE (map.data, 0xffffffff);
1448 memcpy (map.data + sizeof (sync_bytes), payload, nalu_size);
1449 map.data[4] = nal_header >> 8;
1450 map.data[5] = nal_header & 0xff;
1451 gst_buffer_unmap (outbuf, &map);
1453 gst_rtp_copy_video_meta (rtph265depay, outbuf, rtp->buffer);
1455 GST_DEBUG_OBJECT (rtph265depay, "queueing %d bytes", outsize);
1457 /* and assemble in the adapter */
1458 gst_adapter_push (rtph265depay->adapter, outbuf);
1461 GST_DEBUG_OBJECT (rtph265depay,
1462 "Following part of Fragmentation Unit");
1464 /* strip off FU header byte */
1468 outsize = payload_len;
1469 outbuf = gst_buffer_new_and_alloc (outsize);
1470 gst_buffer_fill (outbuf, 0, payload, outsize);
1472 gst_rtp_copy_video_meta (rtph265depay, outbuf, rtp->buffer);
1474 GST_DEBUG_OBJECT (rtph265depay, "queueing %d bytes", outsize);
1476 /* and assemble in the adapter */
1477 gst_adapter_push (rtph265depay->adapter, outbuf);
1481 rtph265depay->fu_marker = marker;
1483 /* if NAL unit ends, flush the adapter */
1485 gst_rtp_h265_finish_fragmentation_unit (rtph265depay);
1486 GST_DEBUG_OBJECT (rtph265depay, "End of Fragmentation Unit");
1491 goto not_implemented; /* PACI packets Section 4.9 */
1494 rtph265depay->wait_start = FALSE;
1496 /* All other cases: Single NAL unit packet Section 4.6 */
1497 /* the entire payload is the output buffer */
1501 goto not_implemented_donl_present;
1504 nalu_size = payload_len;
1505 outsize = nalu_size + sizeof (sync_bytes);
1506 outbuf = gst_buffer_new_and_alloc (outsize);
1508 gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
1509 if (rtph265depay->byte_stream) {
1510 memcpy (map.data, sync_bytes, sizeof (sync_bytes));
1512 GST_WRITE_UINT32_BE (map.data, nalu_size);
1514 memcpy (map.data + 4, payload, nalu_size);
1515 gst_buffer_unmap (outbuf, &map);
1517 gst_rtp_copy_video_meta (rtph265depay, outbuf, rtp->buffer);
1519 gst_rtp_h265_depay_handle_nal (rtph265depay, outbuf, timestamp, marker);
1530 GST_DEBUG_OBJECT (rtph265depay, "empty packet");
1535 GST_DEBUG_OBJECT (rtph265depay, "waiting for start");
1539 not_implemented_donl_present:
1541 GST_ELEMENT_ERROR (rtph265depay, STREAM, FORMAT,
1542 (NULL), ("DONL field present not supported yet"));
1548 GST_ELEMENT_ERROR (rtph265depay, STREAM, FORMAT,
1549 (NULL), ("NAL unit type %d not supported yet", nal_unit_type));
1555 gst_rtp_h265_depay_handle_event (GstRTPBaseDepayload * depay, GstEvent * event)
1557 GstRtpH265Depay *rtph265depay;
1559 rtph265depay = GST_RTP_H265_DEPAY (depay);
1561 switch (GST_EVENT_TYPE (event)) {
1562 case GST_EVENT_FLUSH_STOP:
1563 gst_rtp_h265_depay_reset (rtph265depay, FALSE);
1570 GST_RTP_BASE_DEPAYLOAD_CLASS (parent_class)->handle_event (depay, event);
1573 static GstStateChangeReturn
1574 gst_rtp_h265_depay_change_state (GstElement * element,
1575 GstStateChange transition)
1577 GstRtpH265Depay *rtph265depay;
1578 GstStateChangeReturn ret;
1580 rtph265depay = GST_RTP_H265_DEPAY (element);
1582 switch (transition) {
1583 case GST_STATE_CHANGE_NULL_TO_READY:
1585 case GST_STATE_CHANGE_READY_TO_PAUSED:
1586 gst_rtp_h265_depay_reset (rtph265depay, TRUE);
1592 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1594 switch (transition) {
1595 case GST_STATE_CHANGE_PAUSED_TO_READY:
1596 gst_rtp_h265_depay_reset (rtph265depay, TRUE);
1598 case GST_STATE_CHANGE_READY_TO_NULL:
1607 gst_rtp_h265_depay_plugin_init (GstPlugin * plugin)
1609 GST_DEBUG_CATEGORY_INIT (rtph265depay_debug, "rtph265depay", 0,
1610 "H265 Video RTP Depayloader");
1612 return gst_element_register (plugin, "rtph265depay",
1613 GST_RANK_SECONDARY, GST_TYPE_RTP_H265_DEPAY);