* RTP parser for HEVC/H.265 payload format (draft version 6)
* Copyright (c) 2014 Thomas Volkert <thomas@homer-conferencing.com>
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
+#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/base64.h"
+#include "libavcodec/get_bits.h"
#include "avformat.h"
#include "rtpdec.h"
#include "rtpdec_formats.h"
-#define RTP_HEVC_PAYLOAD_HEADER_SIZE 2
-#define RTP_HEVC_FU_HEADER_SIZE 1
-#define RTP_HEVC_DONL_FIELD_SIZE 2
-#define HEVC_SPECIFIED_NAL_UNIT_TYPES 48
+#define RTP_HEVC_PAYLOAD_HEADER_SIZE 2
+#define RTP_HEVC_FU_HEADER_SIZE 1
+#define RTP_HEVC_DONL_FIELD_SIZE 2
+#define RTP_HEVC_DOND_FIELD_SIZE 1
+#define RTP_HEVC_AP_NALU_LENGTH_FIELD_SIZE 2
+#define HEVC_SPECIFIED_NAL_UNIT_TYPES 48
/* SDP out-of-band signaling data */
struct PayloadContext {
static const uint8_t start_sequence[] = { 0x00, 0x00, 0x00, 0x01 };
-static av_cold PayloadContext *hevc_new_context(void)
-{
- return av_mallocz(sizeof(PayloadContext));
-}
-
-static av_cold void hevc_free_context(PayloadContext *data)
-{
- av_free(data);
-}
-
-static av_cold int hevc_init(AVFormatContext *ctx, int st_index,
- PayloadContext *data)
-{
- av_dlog(ctx, "hevc_init() for stream %d\n", st_index);
-
- if (st_index < 0)
- return 0;
-
- ctx->streams[st_index]->need_parsing = AVSTREAM_PARSE_FULL;
-
- return 0;
-}
-
static av_cold int hevc_sdp_parse_fmtp_config(AVFormatContext *s,
AVStream *stream,
PayloadContext *hevc_data,
/* sprop-sei: [base64] */
if (!strcmp(attr, "sprop-vps") || !strcmp(attr, "sprop-sps") ||
!strcmp(attr, "sprop-pps") || !strcmp(attr, "sprop-sei")) {
- uint8_t **data_ptr;
- int *size_ptr;
+ uint8_t **data_ptr = NULL;
+ int *size_ptr = NULL;
if (!strcmp(attr, "sprop-vps")) {
data_ptr = &hevc_data->vps;
size_ptr = &hevc_data->vps_size;
} else if (!strcmp(attr, "sprop-sei")) {
data_ptr = &hevc_data->sei;
size_ptr = &hevc_data->sei_size;
- }
+ } else
+ av_assert0(0);
ff_h264_parse_sprop_parameter_sets(s, data_ptr,
size_ptr, value);
}
/*
- decode the HEVC payload header according to section 4 of draft version 6:
-
- 0 1
- 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |F| Type | LayerId | TID |
- +-------------+-----------------+
-
- Forbidden zero (F): 1 bit
- NAL unit type (Type): 6 bits
- NUH layer ID (LayerId): 6 bits
- NUH temporal ID plus 1 (TID): 3 bits
- */
+ * decode the HEVC payload header according to section 4 of draft version 6:
+ *
+ * 0 1
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |F| Type | LayerId | TID |
+ * +-------------+-----------------+
+ *
+ * Forbidden zero (F): 1 bit
+ * NAL unit type (Type): 6 bits
+ * NUH layer ID (LayerId): 6 bits
+ * NUH temporal ID plus 1 (TID): 3 bits
+ */
nal_type = (buf[0] >> 1) & 0x3f;
lid = ((buf[0] << 5) & 0x20) | ((buf[1] >> 3) & 0x1f);
tid = buf[1] & 0x07;
}
switch (nal_type) {
- /* aggregated packets (AP) */
- case 48:
- /* pass the HEVC payload header */
- buf += RTP_HEVC_PAYLOAD_HEADER_SIZE;
- len -= RTP_HEVC_PAYLOAD_HEADER_SIZE;
-
- /* pass the HEVC DONL field */
- if (rtp_hevc_ctx->using_donl_field) {
- buf += RTP_HEVC_DONL_FIELD_SIZE;
- len -= RTP_HEVC_DONL_FIELD_SIZE;
- }
-
- /* fall-through */
/* video parameter set (VPS) */
case 32:
/* sequence parameter set (SPS) */
memcpy(pkt->data + sizeof(start_sequence), buf, len);
break;
+ /* aggregated packet (AP) - with two or more NAL units */
+ case 48:
+ /* pass the HEVC payload header */
+ buf += RTP_HEVC_PAYLOAD_HEADER_SIZE;
+ len -= RTP_HEVC_PAYLOAD_HEADER_SIZE;
+
+ /* pass the HEVC DONL field */
+ if (rtp_hevc_ctx->using_donl_field) {
+ buf += RTP_HEVC_DONL_FIELD_SIZE;
+ len -= RTP_HEVC_DONL_FIELD_SIZE;
+ }
+
+ res = ff_h264_handle_aggregated_packet(ctx, rtp_hevc_ctx, pkt, buf, len,
+ rtp_hevc_ctx->using_donl_field ?
+ RTP_HEVC_DOND_FIELD_SIZE : 0,
+ NULL, 0);
+ if (res < 0)
+ return res;
+ break;
/* fragmentation unit (FU) */
case 49:
/* pass the HEVC payload header */
len -= RTP_HEVC_PAYLOAD_HEADER_SIZE;
/*
- decode the FU header
-
- 0 1 2 3 4 5 6 7
- +-+-+-+-+-+-+-+-+
- |S|E| FuType |
- +---------------+
-
- Start fragment (S): 1 bit
- End fragment (E): 1 bit
- FuType: 6 bits
- */
+ * decode the FU header
+ *
+ * 0 1 2 3 4 5 6 7
+ * +-+-+-+-+-+-+-+-+
+ * |S|E| FuType |
+ * +---------------+
+ *
+ * Start fragment (S): 1 bit
+ * End fragment (E): 1 bit
+ * FuType: 6 bits
+ */
first_fragment = buf[0] & 0x80;
last_fragment = buf[0] & 0x40;
fu_type = buf[0] & 0x3f;
av_dlog(ctx, " FU type %d with %d bytes\n", fu_type, len);
+ /* sanity check for size of input packet: 1 byte payload at least */
if (len > 0) {
new_nal_header[0] = (rtp_pl[0] & 0x81) | (fu_type << 1);
new_nal_header[1] = rtp_pl[1];
memcpy(pkt->data, buf, len);
}
} else {
- /* sanity check for size of input packet: 1 byte payload at least */
- av_log(ctx, AV_LOG_ERROR,
- "Too short RTP/HEVC packet, got %d bytes of NAL unit type %d\n",
- len, nal_type);
- res = AVERROR_INVALIDDATA;
+ if (len < 0) {
+ av_log(ctx, AV_LOG_ERROR,
+ "Too short RTP/HEVC packet, got %d bytes of NAL unit type %d\n",
+ len, nal_type);
+ res = AVERROR_INVALIDDATA;
+ } else {
+ res = AVERROR(EAGAIN);
+ }
}
break;
.enc_name = "H265",
.codec_type = AVMEDIA_TYPE_VIDEO,
.codec_id = AV_CODEC_ID_HEVC,
- .init = hevc_init,
+ .need_parsing = AVSTREAM_PARSE_FULL,
+ .priv_data_size = sizeof(PayloadContext),
.parse_sdp_a_line = hevc_parse_sdp_line,
- .alloc = hevc_new_context,
- .free = hevc_free_context,
- .parse_packet = hevc_handle_packet
+ .parse_packet = hevc_handle_packet,
};
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