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rtpenc: Merge the h264 and hevc packetizers 

They share a great deal of common structure; only a few minor
bits in the headers differ.

This also fixes an off-by-one in sending of the last fragment
of large HEVC nals (where it previously sent len+2 bytes, even
if it should have been len+RTP_HEVC_HEADERS_SIZE aka len+3).

Signed-off-by: Martin Storsjö <martin@martin.st>
tags/n2.6
Martin Storsjö 10 years ago
parent
3567b91e49
commit
c82bf15dca
6 changed files with 211 additions and 312 deletions
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  1. +1
    -2
      libavformat/Makefile
  2. +2
    -2
      libavformat/rtpenc.c
  3. +1
    -2
      libavformat/rtpenc.h
  4. +0
    -136
      libavformat/rtpenc_h264.c
  5. +207
    -0
      libavformat/rtpenc_h264_hevc.c
  6. +0
    -170
      libavformat/rtpenc_hevc.c

+ 1
- 2
libavformat/Makefile View File

@@ -299,11 +299,10 @@ OBJS-$(CONFIG_RTP_MUXER) += rtp.o \
rtpenc_h261.o \
rtpenc_h263.o \
rtpenc_h263_rfc2190.o \
rtpenc_hevc.o \
rtpenc_h264_hevc.o \
rtpenc_jpeg.o \
rtpenc_mpv.o \
rtpenc.o \
rtpenc_h264.o \
rtpenc_vp8.o \
rtpenc_xiph.o \
avc.o hevc.o


+ 2
- 2
libavformat/rtpenc.c View File

@@ -577,7 +577,7 @@ static int rtp_write_packet(AVFormatContext *s1, AVPacket *pkt)
rtp_send_mpegts_raw(s1, pkt->data, size);
break;
case AV_CODEC_ID_H264:
ff_rtp_send_h264(s1, pkt->data, size);
ff_rtp_send_h264_hevc(s1, pkt->data, size);
break;
case AV_CODEC_ID_H261:
ff_rtp_send_h261(s1, pkt->data, size);
@@ -596,7 +596,7 @@ static int rtp_write_packet(AVFormatContext *s1, AVPacket *pkt)
ff_rtp_send_h263(s1, pkt->data, size);
break;
case AV_CODEC_ID_HEVC:
ff_rtp_send_hevc(s1, pkt->data, size);
ff_rtp_send_h264_hevc(s1, pkt->data, size);
break;
case AV_CODEC_ID_VORBIS:
case AV_CODEC_ID_THEORA:


+ 1
- 2
libavformat/rtpenc.h View File

@@ -81,12 +81,11 @@ typedef struct RTPMuxContext RTPMuxContext;

void ff_rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len, int m);

void ff_rtp_send_h264(AVFormatContext *s1, const uint8_t *buf1, int size);
void ff_rtp_send_h264_hevc(AVFormatContext *s1, const uint8_t *buf1, int size);
void ff_rtp_send_h261(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);


+ 0
- 136
libavformat/rtpenc_h264.c View File

@@ -1,136 +0,0 @@
/*
* RTP packetization for H.264 (RFC3984)
* Copyright (c) 2008 Luca Abeni
*
* 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
*/

/**
* @file
* @brief H.264 packetization
* @author Luca Abeni <lucabe72@email.it>
*/

#include "libavutil/intreadwrite.h"

#include "avformat.h"
#include "avc.h"
#include "rtpenc.h"

static void flush_buffered(AVFormatContext *s1, int last)
{
RTPMuxContext *s = s1->priv_data;
if (s->buf_ptr != s->buf) {
// If we're only sending one single NAL unit, send it as such, skip
// the STAP-A framing
if (s->buffered_nals == 1)
ff_rtp_send_data(s1, s->buf + 3, s->buf_ptr - s->buf - 3, last);
else
ff_rtp_send_data(s1, s->buf, s->buf_ptr - s->buf, last);
}
s->buf_ptr = s->buf;
s->buffered_nals = 0;
}

static void nal_send(AVFormatContext *s1, const uint8_t *buf, int size, int last)
{
RTPMuxContext *s = s1->priv_data;

av_log(s1, AV_LOG_DEBUG, "Sending NAL %x of len %d M=%d\n", buf[0] & 0x1F, size, last);
if (size <= s->max_payload_size) {
int buffered_size = s->buf_ptr - s->buf;
// Flush buffered NAL units if the current unit doesn't fit
if (buffered_size + 2 + size > s->max_payload_size) {
flush_buffered(s1, 0);
buffered_size = 0;
}
// If we aren't using mode 0, and the NAL unit fits including the
// framing (2 bytes length, plus 1 byte for the STAP-A marker),
// write the unit to the buffer as a STAP-A packet, otherwise flush
// and send as single NAL.
if (buffered_size + 3 + size <= s->max_payload_size &&
!(s->flags & FF_RTP_FLAG_H264_MODE0)) {
if (buffered_size == 0)
*s->buf_ptr++ = 24;
AV_WB16(s->buf_ptr, size);
s->buf_ptr += 2;
memcpy(s->buf_ptr, buf, size);
s->buf_ptr += size;
s->buffered_nals++;
} else {
flush_buffered(s1, 0);
ff_rtp_send_data(s1, buf, size, last);
}
} else {
uint8_t type = buf[0] & 0x1F;
uint8_t nri = buf[0] & 0x60;

flush_buffered(s1, 0);
if (s->flags & FF_RTP_FLAG_H264_MODE0) {
av_log(s1, AV_LOG_ERROR,
"NAL size %d > %d, try -slice-max-size %d\n", size,
s->max_payload_size, s->max_payload_size);
return;
}
av_log(s1, AV_LOG_DEBUG, "NAL size %d > %d\n", size, s->max_payload_size);
s->buf[0] = 28; /* FU Indicator; Type = 28 ---> FU-A */
s->buf[0] |= nri;
s->buf[1] = type;
s->buf[1] |= 1 << 7;
buf += 1;
size -= 1;
while (size + 2 > s->max_payload_size) {
memcpy(&s->buf[2], buf, s->max_payload_size - 2);
ff_rtp_send_data(s1, s->buf, s->max_payload_size, 0);
buf += s->max_payload_size - 2;
size -= s->max_payload_size - 2;
s->buf[1] &= ~(1 << 7);
}
s->buf[1] |= 1 << 6;
memcpy(&s->buf[2], buf, size);
ff_rtp_send_data(s1, s->buf, size + 2, last);
}
}

void ff_rtp_send_h264(AVFormatContext *s1, const uint8_t *buf1, int size)
{
const uint8_t *r, *end = buf1 + size;
RTPMuxContext *s = s1->priv_data;

s->timestamp = s->cur_timestamp;
s->buf_ptr = s->buf;
if (s->nal_length_size)
r = ff_avc_mp4_find_startcode(buf1, end, s->nal_length_size) ? buf1 : end;
else
r = ff_avc_find_startcode(buf1, end);
while (r < end) {
const uint8_t *r1;

if (s->nal_length_size) {
r1 = ff_avc_mp4_find_startcode(r, end, s->nal_length_size);
if (!r1)
r1 = end;
r += s->nal_length_size;
} else {
while (!*(r++));
r1 = ff_avc_find_startcode(r, end);
}
nal_send(s1, r, r1 - r, r1 == end);
r = r1;
}
flush_buffered(s1, 1);
}

+ 207
- 0
libavformat/rtpenc_h264_hevc.c View File

@@ -0,0 +1,207 @@
/*
* RTP packetization for H.264 (RFC3984)
* RTP packetizer for HEVC/H.265 payload format (draft version 6)
* Copyright (c) 2008 Luca Abeni
* 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
*/

/**
* @file
* @brief H.264/HEVC packetization
* @author Luca Abeni <lucabe72@email.it>
*/

#include "libavutil/intreadwrite.h"

#include "avformat.h"
#include "avc.h"
#include "rtpenc.h"

static void flush_buffered(AVFormatContext *s1, int last)
{
RTPMuxContext *s = s1->priv_data;
if (s->buf_ptr != s->buf) {
// If we're only sending one single NAL unit, send it as such, skip
// the STAP-A/AP framing
if (s->buffered_nals == 1) {
enum AVCodecID codec = s1->streams[0]->codec->codec_id;
if (codec == AV_CODEC_ID_H264)
ff_rtp_send_data(s1, s->buf + 3, s->buf_ptr - s->buf - 3, last);
else
ff_rtp_send_data(s1, s->buf + 4, s->buf_ptr - s->buf - 4, last);
} else
ff_rtp_send_data(s1, s->buf, s->buf_ptr - s->buf, last);
}
s->buf_ptr = s->buf;
s->buffered_nals = 0;
}

static void nal_send(AVFormatContext *s1, const uint8_t *buf, int size, int last)
{
RTPMuxContext *s = s1->priv_data;
enum AVCodecID codec = s1->streams[0]->codec->codec_id;

av_log(s1, AV_LOG_DEBUG, "Sending NAL %x of len %d M=%d\n", buf[0] & 0x1F, size, last);
if (size <= s->max_payload_size) {
int buffered_size = s->buf_ptr - s->buf;
int header_size;
int skip_aggregate = 0;

if (codec == AV_CODEC_ID_H264) {
header_size = 1;
skip_aggregate = s->flags & FF_RTP_FLAG_H264_MODE0;
} else {
header_size = 2;
}

// Flush buffered NAL units if the current unit doesn't fit
if (buffered_size + 2 + size > s->max_payload_size) {
flush_buffered(s1, 0);
buffered_size = 0;
}
// If we aren't using mode 0, and the NAL unit fits including the
// framing (2 bytes length, plus 1/2 bytes for the STAP-A/AP marker),
// write the unit to the buffer as a STAP-A/AP packet, otherwise flush
// and send as single NAL.
if (buffered_size + 2 + header_size + size <= s->max_payload_size &&
!skip_aggregate) {
if (buffered_size == 0) {
if (codec == AV_CODEC_ID_H264) {
*s->buf_ptr++ = 24;
} else {
*s->buf_ptr++ = 48 << 1;
*s->buf_ptr++ = 1;
}
}
AV_WB16(s->buf_ptr, size);
s->buf_ptr += 2;
memcpy(s->buf_ptr, buf, size);
s->buf_ptr += size;
s->buffered_nals++;
} else {
flush_buffered(s1, 0);
ff_rtp_send_data(s1, buf, size, last);
}
} else {
int flag_byte, header_size;
flush_buffered(s1, 0);
if (codec == AV_CODEC_ID_H264 && (s->flags & FF_RTP_FLAG_H264_MODE0)) {
av_log(s1, AV_LOG_ERROR,
"NAL size %d > %d, try -slice-max-size %d\n", size,
s->max_payload_size, s->max_payload_size);
return;
}
av_log(s1, AV_LOG_DEBUG, "NAL size %d > %d\n", size, s->max_payload_size);
if (codec == AV_CODEC_ID_H264) {
uint8_t type = buf[0] & 0x1F;
uint8_t nri = buf[0] & 0x60;

s->buf[0] = 28; /* FU Indicator; Type = 28 ---> FU-A */
s->buf[0] |= nri;
s->buf[1] = type;
s->buf[1] |= 1 << 7;
buf += 1;
size -= 1;

flag_byte = 1;
header_size = 2;
} else {
uint8_t nal_type = (buf[0] >> 1) & 0x3F;
/*
* 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
*/
s->buf[0] = 49 << 1;
s->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
*/
s->buf[2] = nal_type;
/* set the S bit: mark as start fragment */
s->buf[2] |= 1 << 7;

/* pass the original NAL header */
buf += 2;
size -= 2;

flag_byte = 2;
header_size = 3;
}

while (size + header_size > s->max_payload_size) {
memcpy(&s->buf[header_size], buf, s->max_payload_size - header_size);
ff_rtp_send_data(s1, s->buf, s->max_payload_size, 0);
buf += s->max_payload_size - header_size;
size -= s->max_payload_size - header_size;
s->buf[flag_byte] &= ~(1 << 7);
}
s->buf[flag_byte] |= 1 << 6;
memcpy(&s->buf[header_size], buf, size);
ff_rtp_send_data(s1, s->buf, size + header_size, last);
}
}

void ff_rtp_send_h264_hevc(AVFormatContext *s1, const uint8_t *buf1, int size)
{
const uint8_t *r, *end = buf1 + size;
RTPMuxContext *s = s1->priv_data;

s->timestamp = s->cur_timestamp;
s->buf_ptr = s->buf;
if (s->nal_length_size)
r = ff_avc_mp4_find_startcode(buf1, end, s->nal_length_size) ? buf1 : end;
else
r = ff_avc_find_startcode(buf1, end);
while (r < end) {
const uint8_t *r1;

if (s->nal_length_size) {
r1 = ff_avc_mp4_find_startcode(r, end, s->nal_length_size);
if (!r1)
r1 = end;
r += s->nal_length_size;
} else {
while (!*(r++));
r1 = ff_avc_find_startcode(r, end);
}
nal_send(s1, r, r1 - r, r1 == end);
r = r1;
}
flush_buffered(s1, 1);
}

+ 0
- 170
libavformat/rtpenc_hevc.c View File

@@ -1,170 +0,0 @@
/*
* 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 "libavutil/intreadwrite.h"

#include "avc.h"
#include "avformat.h"
#include "rtpenc.h"

#define RTP_HEVC_HEADERS_SIZE 3

static void flush_buffered(AVFormatContext *s1, int last)
{
RTPMuxContext *s = s1->priv_data;
if (s->buf_ptr != s->buf) {
// If only sending one single NAL unit, skip the aggregation framing
if (s->buffered_nals == 1)
ff_rtp_send_data(s1, s->buf + 4, s->buf_ptr - s->buf - 4, last);
else
ff_rtp_send_data(s1, s->buf, s->buf_ptr - s->buf, last);
}
s->buf_ptr = s->buf;
s->buffered_nals = 0;
}

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) {
int buffered_size = rtp_ctx->buf_ptr - rtp_ctx->buf;
/* Flush buffered NAL units if the current unit doesn't fit */
if (buffered_size + 2 + len > rtp_ctx->max_payload_size) {
flush_buffered(ctx, 0);
buffered_size = 0;
}
/* If the NAL unit fits including the framing, write the unit
* to the buffer as an aggregate packet, otherwise flush and
* send as single NAL. */
if (buffered_size + 4 + len <= rtp_ctx->max_payload_size) {
if (buffered_size == 0) {
*rtp_ctx->buf_ptr++ = 48 << 1;
*rtp_ctx->buf_ptr++ = 1;
}
AV_WB16(rtp_ctx->buf_ptr, len);
rtp_ctx->buf_ptr += 2;
memcpy(rtp_ctx->buf_ptr, buf, len);
rtp_ctx->buf_ptr += len;
rtp_ctx->buffered_nals++;
} else {
flush_buffered(ctx, 0);
ff_rtp_send_data(ctx, buf, len, last_packet_of_frame);
}
} else {
flush_buffered(ctx, 0);
/*
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;
rtp_ctx->buf_ptr = rtp_ctx->buf;

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;
}
flush_buffered(ctx, 1);
}

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