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rtpenc: HEVC/H.265 support

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Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Thomas Volkert 2014-09-21 12:10:42 +02:00 committed by Martin Storsjö
parent a2efbecc4e
commit ddf5fb71ee
7 changed files with 153 additions and 2 deletions
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2
Changelog
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@ -3,7 +3,7 @@ releases are sorted from youngest to oldest.
version <next>:
- aliases and defaults for Ogg subtypes (opus, spx)
- HEVC/H.265 RTP payload format (draft v6) depacketizer
- HEVC/H.265 RTP payload format (draft v6) packetizer and depacketizer
- avplay now exits by default at the end of playback

1
libavformat/Makefile
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@ -291,6 +291,7 @@ OBJS-$(CONFIG_RTP_MUXER) += rtp.o \
rtpenc_amr.o \
rtpenc_h263.o \
rtpenc_h263_rfc2190.o \
rtpenc_hevc.o \
rtpenc_jpeg.o \
rtpenc_mpv.o \
rtpenc.o \

13
libavformat/rtpenc.c
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@ -52,6 +52,7 @@ static int is_supported(enum AVCodecID id)
case AV_CODEC_ID_H263:
case AV_CODEC_ID_H263P:
case AV_CODEC_ID_H264:
case AV_CODEC_ID_HEVC:
case AV_CODEC_ID_MPEG1VIDEO:
case AV_CODEC_ID_MPEG2VIDEO:
case AV_CODEC_ID_MPEG4:
@ -196,6 +197,15 @@ static int rtp_write_header(AVFormatContext *s1)
s->nal_length_size = (st->codec->extradata[4] & 0x03) + 1;
}
break;
case AV_CODEC_ID_HEVC:
/* Only check for the standardized hvcC version of extradata, keeping
* things simple and similar to the avcC/H264 case above, instead
* of trying to handle the pre-standardization versions (as in
* libavcodec/hevc.c). */
if (st->codec->extradata_size > 21 && st->codec->extradata[0] == 1) {
s->nal_length_size = (st->codec->extradata[21] & 0x03) + 1;
}
break;
case AV_CODEC_ID_VORBIS:
case AV_CODEC_ID_THEORA:
if (!s->max_frames_per_packet) s->max_frames_per_packet = 15;
@ -566,6 +576,9 @@ static int rtp_write_packet(AVFormatContext *s1, AVPacket *pkt)
case AV_CODEC_ID_H263P:
ff_rtp_send_h263(s1, pkt->data, size);
break;
case AV_CODEC_ID_HEVC:
ff_rtp_send_hevc(s1, pkt->data, size);
break;
case AV_CODEC_ID_VORBIS:
case AV_CODEC_ID_THEORA:
ff_rtp_send_xiph(s1, pkt->data, size);

1
libavformat/rtpenc.h
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@ -84,6 +84,7 @@ void ff_rtp_send_h264(AVFormatContext *s1, const uint8_t *buf1, int size);
void ff_rtp_send_h263(AVFormatContext *s1, const uint8_t *buf1, int size);
void ff_rtp_send_h263_rfc2190(AVFormatContext *s1, const uint8_t *buf1, int size,
const uint8_t *mb_info, int mb_info_size);
void ff_rtp_send_hevc(AVFormatContext *s1, const uint8_t *buf1, int size);
void ff_rtp_send_aac(AVFormatContext *s1, const uint8_t *buff, int size);
void ff_rtp_send_latm(AVFormatContext *s1, const uint8_t *buff, int size);
void ff_rtp_send_amr(AVFormatContext *s1, const uint8_t *buff, int size);

130
libavformat/rtpenc_hevc.c Normal file
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@ -0,0 +1,130 @@
/*
* RTP packetizer for HEVC/H.265 payload format (draft version 6)
* Copyright (c) 2014 Thomas Volkert <thomas@homer-conferencing.com>
*
* This file is part of Libav.
*
* Libav 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,
* 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
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avc.h"
#include "avformat.h"
#include "rtpenc.h"
#define RTP_HEVC_HEADERS_SIZE 3
static void nal_send(AVFormatContext *ctx, const uint8_t *buf, int len, int last_packet_of_frame)
{
RTPMuxContext *rtp_ctx = ctx->priv_data;
int rtp_payload_size = rtp_ctx->max_payload_size - RTP_HEVC_HEADERS_SIZE;
int nal_type = (buf[0] >> 1) & 0x3F;
/* send it as one single NAL unit? */
if (len <= rtp_ctx->max_payload_size) {
/* use the original NAL unit buffer and transmit it as RTP payload */
ff_rtp_send_data(ctx, buf, len, last_packet_of_frame);
} else {
/*
create the HEVC payload header and transmit the buffer as fragmentation units (FU)
0 1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|F| Type | LayerId | TID |
+-------------+-----------------+
F = 0
Type = 49 (fragmentation unit (FU))
LayerId = 0
TID = 1
*/
rtp_ctx->buf[0] = 49 << 1;
rtp_ctx->buf[1] = 1;
/*
create the FU header
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
|S|E| FuType |
+---------------+
S = variable
E = variable
FuType = NAL unit type
*/
rtp_ctx->buf[2] = nal_type;
/* set the S bit: mark as start fragment */
rtp_ctx->buf[2] |= 1 << 7;
/* pass the original NAL header */
buf += 2;
len -= 2;
while (len > rtp_payload_size) {
/* complete and send current RTP packet */
memcpy(&rtp_ctx->buf[RTP_HEVC_HEADERS_SIZE], buf, rtp_payload_size);
ff_rtp_send_data(ctx, rtp_ctx->buf, rtp_ctx->max_payload_size, 0);
buf += rtp_payload_size;
len -= rtp_payload_size;
/* reset the S bit */
rtp_ctx->buf[2] &= ~(1 << 7);
}
/* set the E bit: mark as last fragment */
rtp_ctx->buf[2] |= 1 << 6;
/* complete and send last RTP packet */
memcpy(&rtp_ctx->buf[RTP_HEVC_HEADERS_SIZE], buf, len);
ff_rtp_send_data(ctx, rtp_ctx->buf, len + 2, last_packet_of_frame);
}
}
void ff_rtp_send_hevc(AVFormatContext *ctx, const uint8_t *frame_buf, int frame_size)
{
const uint8_t *next_NAL_unit;
const uint8_t *buf_ptr, *buf_end = frame_buf + frame_size;
RTPMuxContext *rtp_ctx = ctx->priv_data;
/* use the default 90 KHz time stamp */
rtp_ctx->timestamp = rtp_ctx->cur_timestamp;
if (rtp_ctx->nal_length_size)
buf_ptr = ff_avc_mp4_find_startcode(frame_buf, buf_end, rtp_ctx->nal_length_size) ? frame_buf : buf_end;
else
buf_ptr = ff_avc_find_startcode(frame_buf, buf_end);
/* find all NAL units and send them as separate packets */
while (buf_ptr < buf_end) {
if (rtp_ctx->nal_length_size) {
next_NAL_unit = ff_avc_mp4_find_startcode(buf_ptr, buf_end, rtp_ctx->nal_length_size);
if (!next_NAL_unit)
next_NAL_unit = buf_end;
buf_ptr += rtp_ctx->nal_length_size;
} else {
while (!*(buf_ptr++))
;
next_NAL_unit = ff_avc_find_startcode(buf_ptr, buf_end);
}
/* send the next NAL unit */
nal_send(ctx, buf_ptr, next_NAL_unit - buf_ptr, next_NAL_unit == buf_end);
/* jump to the next NAL unit */
buf_ptr = next_NAL_unit;
}
}

6
libavformat/sdp.c
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@ -428,6 +428,12 @@ static char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c,
payload_type,
payload_type, c->width, c->height);
break;
case AV_CODEC_ID_HEVC:
if (c->extradata_size)
av_log(NULL, AV_LOG_WARNING, "HEVC extradata not currently "
"passed properly through SDP\n");
av_strlcatf(buff, size, "a=rtpmap:%d H265/90000\r\n", payload_type);
break;
case AV_CODEC_ID_MPEG4:
if (c->extradata_size) {
config = extradata2config(c);

2
libavformat/version.h
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@ -30,7 +30,7 @@
#include "libavutil/version.h"
#define LIBAVFORMAT_VERSION_MAJOR 56
#define LIBAVFORMAT_VERSION_MINOR 4
#define LIBAVFORMAT_VERSION_MINOR 5
#define LIBAVFORMAT_VERSION_MICRO 0
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \