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avformat/rtpenc_rfc4175: support for interlace format

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Below are steps how to test on your local host:
wget --no-check-certificate https://samples.ffmpeg.org/MPEG2/interlaced/burosch1.mpg

1. interlace format:
ffmpeg  -re -i ./burosch1.mpg  -c:v bitpacked  -pix_fmt yuv422p10  -f rtp  rtp://239.255.0.1:6000
copy and create sdp file test.sdp
ffplay -buffer_size 671088640 -protocol_whitelist "file,rtp,udp"  test.sdp

2. progressive format:
ffmpeg  -re -i ./burosch1.mpg  -vf yadif -c:v bitpacked  -pix_fmt yuv422p10  -f rtp  rtp://239.255.0.1:6000
copy and create sdp file test.sdp
ffplay -buffer_size 671088640 -protocol_whitelist "file,rtp,udp"  test.sdp

Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
This commit is contained in:
Limin Wang
2022-01-01 20:19:50 +08:00
parent 3ea93bbd6d
commit b697326a68
4 changed files with 33 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
libavformat/rtpenc_rfc4175.c
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@@ -21,36 +21,40 @@
#include "avformat.h"
#include "rtpenc.h"
void ff_rtp_send_raw_rfc4175(AVFormatContext *s1, const uint8_t *buf, int size)
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 field = 0;
int i = 0;
int offset = 0;
s->timestamp = s->cur_timestamp;
switch (s1->streams[0]->codecpar->format) {
case AV_PIX_FMT_UYVY422:
xinc = yinc = 2;
xinc = 2;
yinc = 1 << interlaced;
pgroup = 4;
break;
case AV_PIX_FMT_YUV422P10:
xinc = yinc = 2;
xinc = 2;
yinc = 1 << interlaced;
pgroup = 5;
break;
case AV_PIX_FMT_YUV420P:
xinc = yinc = 4;
xinc = 4;
yinc = 1 << interlaced;
pgroup = 6;
break;
case AV_PIX_FMT_RGB24:
xinc = yinc = 1;
xinc = 1;
yinc = 1 << interlaced;
pgroup = 3;
break;
case AV_PIX_FMT_BGR24:
xinc = yinc = 1;
xinc = 1;
yinc = 1 << interlaced;
pgroup = 3;
break;
default:
@@ -72,7 +76,9 @@ void ff_rtp_send_raw_rfc4175(AVFormatContext *s1, const uint8_t *buf, int size)
headers = dest;
do {
pixels = width * xinc - offset;
int l_line;
pixels = width - offset;
length = (pixels * pgroup) / xinc;
left -= head_size;
@@ -90,8 +96,9 @@ void ff_rtp_send_raw_rfc4175(AVFormatContext *s1, const uint8_t *buf, int size)
*dest++ = length & 0xff;
/* Line No */
*dest++ = ((i >> 8) & 0x7f) | ((field << 7) & 0x80);
*dest++ = i & 0xff;
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;
@@ -106,16 +113,20 @@ void ff_rtp_send_raw_rfc4175(AVFormatContext *s1, const uint8_t *buf, int size)
} while (cont);
do {
int l_field;
int l_line;
int l_off;
int 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 * width + l_off) * pgroup / xinc;
if (copy_offset + length > size)
break;