mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
f13ae63259
Found while reviewing: CID1494441 Untrusted value as argument Sponsored-by: Sovereign Tech Fund Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
140 lines
4.2 KiB
C
140 lines
4.2 KiB
C
/*
|
|
* RTP Packetization of RAW video (RFC4175)
|
|
* Copyright (c) 2021 Limin Wang
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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 FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#include "avformat.h"
|
|
#include "rtpenc.h"
|
|
|
|
void ff_rtp_send_raw_rfc4175(AVFormatContext *s1, const uint8_t *buf, int size, int interlaced, int field)
|
|
{
|
|
RTPMuxContext *s = s1->priv_data;
|
|
int width = s1->streams[0]->codecpar->width;
|
|
int height = s1->streams[0]->codecpar->height;
|
|
int xinc, yinc, pgroup;
|
|
int i = 0;
|
|
int offset = 0;
|
|
|
|
s->timestamp = s->cur_timestamp;
|
|
switch (s1->streams[0]->codecpar->format) {
|
|
case AV_PIX_FMT_UYVY422:
|
|
xinc = 2;
|
|
yinc = 1 << interlaced;
|
|
pgroup = 4;
|
|
break;
|
|
case AV_PIX_FMT_YUV422P10:
|
|
xinc = 2;
|
|
yinc = 1 << interlaced;
|
|
pgroup = 5;
|
|
break;
|
|
case AV_PIX_FMT_YUV420P:
|
|
xinc = 4;
|
|
yinc = 1 << interlaced;
|
|
pgroup = 6;
|
|
break;
|
|
case AV_PIX_FMT_RGB24:
|
|
xinc = 1;
|
|
yinc = 1 << interlaced;
|
|
pgroup = 3;
|
|
break;
|
|
case AV_PIX_FMT_BGR24:
|
|
xinc = 1;
|
|
yinc = 1 << interlaced;
|
|
pgroup = 3;
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
|
|
while (i < height) {
|
|
int left = s->max_payload_size;
|
|
uint8_t *dest = s->buf;
|
|
uint8_t *headers;
|
|
const int head_size = 6;
|
|
int next_line;
|
|
int length, cont, pixels;
|
|
|
|
/* Extended Sequence Number */
|
|
*dest++ = 0;
|
|
*dest++ = 0;
|
|
left -= 2;
|
|
|
|
headers = dest;
|
|
do {
|
|
int l_line;
|
|
|
|
pixels = width - offset;
|
|
length = (pixels * pgroup) / xinc;
|
|
|
|
left -= head_size;
|
|
if (left >= length) {
|
|
next_line = 1;
|
|
} else {
|
|
pixels = (left / pgroup) * xinc;
|
|
length = (pixels * pgroup) / xinc;
|
|
next_line = 0;
|
|
}
|
|
left -= length;
|
|
|
|
/* Length */
|
|
*dest++ = (length >> 8) & 0xff;
|
|
*dest++ = length & 0xff;
|
|
|
|
/* Line No */
|
|
l_line = i >> interlaced;
|
|
*dest++ = ((l_line >> 8) & 0x7f) | ((field << 7) & 0x80);
|
|
*dest++ = l_line & 0xff;
|
|
if (next_line) i += yinc;
|
|
|
|
cont = (left > (head_size + pgroup) && i < height) ? 0x80 : 0x00;
|
|
/* Offset and Continuation marker */
|
|
*dest++ = ((offset >> 8) & 0x7f) | cont;
|
|
*dest++ = offset & 0xff;
|
|
|
|
if (next_line)
|
|
offset = 0;
|
|
else
|
|
offset += pixels;
|
|
} while (cont);
|
|
|
|
do {
|
|
int l_field;
|
|
int l_line;
|
|
int l_off;
|
|
int64_t copy_offset;
|
|
|
|
length = (headers[0] << 8) | headers[1];
|
|
l_field = (headers[2] & 0x80) >> 7;
|
|
l_line = ((headers[2] & 0x7f) << 8) | headers[3];
|
|
l_off = ((headers[4] & 0x7f) << 8) | headers[5];
|
|
cont = headers[4] & 0x80;
|
|
headers += head_size;
|
|
|
|
if (interlaced)
|
|
l_line = 2 * l_line + l_field;
|
|
copy_offset = (l_line * (int64_t)width + l_off) * pgroup / xinc;
|
|
if (copy_offset + length > size)
|
|
break;
|
|
memcpy (dest, buf + copy_offset, length);
|
|
dest += length;
|
|
} while (cont);
|
|
|
|
ff_rtp_send_data (s1, s->buf, s->max_payload_size - left, i >= height);
|
|
}
|
|
}
|