1 files changed, 71 insertions, 0 deletions
diff --git a/gnu/packages/patches/ffmpeg-jami-rtp_ext_abs_send_time.patch b/gnu/packages/patches/ffmpeg-jami-rtp_ext_abs_send_time.patch
new file mode 100644
index 0000000000..cf52cf972a
--- /dev/null
+++ b/gnu/packages/patches/ffmpeg-jami-rtp_ext_abs_send_time.patch
@@ -0,0 +1,71 @@
+diff --git a/libavformat/rtpenc.c b/libavformat/rtpenc.c
+index 63047beccc..d59ec3dc8c 100644
+--- a/libavformat/rtpenc.c
++++ b/libavformat/rtpenc.c
+@@ -28,6 +28,8 @@
+ 
+ #include "rtpenc.h"
+ 
++#define EXT_ABS_SEND_TIME
++
+ static const AVOption options[] = {
+     FF_RTP_FLAG_OPTS(RTPMuxContext, flags),
+     { "payload_type", "Specify RTP payload type", offsetof(RTPMuxContext, payload_type), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, 127, AV_OPT_FLAG_ENCODING_PARAM },
+@@ -146,7 +148,11 @@ static int rtp_write_header(AVFormatContext *s1)
+                                     s1->pb->max_packet_size);
+     } else
+         s1->packet_size = s1->pb->max_packet_size;
++#ifdef EXT_ABS_SEND_TIME
++    if (s1->packet_size <= 20) {
++#else
+     if (s1->packet_size <= 12) {
++#endif
+         av_log(s1, AV_LOG_ERROR, "Max packet size %u too low\n", s1->packet_size);
+         return AVERROR(EIO);
+     }
+@@ -154,7 +160,11 @@ static int rtp_write_header(AVFormatContext *s1)
+     if (!s->buf) {
+         return AVERROR(ENOMEM);
+     }
++#ifdef EXT_ABS_SEND_TIME
++    s->max_payload_size = s1->packet_size - 20;
++#else
+     s->max_payload_size = s1->packet_size - 12;
++#endif
+ 
+     if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
+         avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
+@@ -332,16 +342,34 @@ static void rtcp_send_sr(AVFormatContext *s1, int64_t ntp_time, int bye)
+ void ff_rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len, int m)
+ {
+     RTPMuxContext *s = s1->priv_data;
++    uint64_t ntp64_time;
++    uint32_t absoluteSendTime;
+ 
+     av_log(s1, AV_LOG_TRACE, "rtp_send_data size=%d\n", len);
+ 
+     /* build the RTP header */
++#ifdef EXT_ABS_SEND_TIME
++    avio_w8(s1->pb, RTP_VERSION << 6 | 0x10); // extention bit
++#else
+     avio_w8(s1->pb, RTP_VERSION << 6);
++#endif
+     avio_w8(s1->pb, (s->payload_type & 0x7f) | ((m & 0x01) << 7));
+     avio_wb16(s1->pb, s->seq);
+     avio_wb32(s1->pb, s->timestamp);
+     avio_wb32(s1->pb, s->ssrc);
+ 
++#ifdef EXT_ABS_SEND_TIME
++    avio_wb16(s1->pb, 0xBEDE);      // magic word
++    avio_wb16(s1->pb, 0x0001);      // length=1
++    avio_w8(s1->pb, 0x32);         // ID=3 and lenght=2
++    ntp64_time = ff_get_formatted_ntp_time(ff_ntp_time());
++    absoluteSendTime = (uint32_t)((ntp64_time>> 14) & 0x00ffffff);
++    av_log(s1, AV_LOG_TRACE, "ntp64:%lu, abs_time:%u\n", ntp64_time, absoluteSendTime);
++    avio_w8(s1->pb, (uint8_t)(absoluteSendTime >> 16));
++    avio_w8(s1->pb, (uint8_t)(absoluteSendTime >> 8 & 0xff));
++    avio_w8(s1->pb, (uint8_t)(absoluteSendTime & 0xff));
++#endif
++
+     avio_write(s1->pb, buf1, len);
+     avio_flush(s1->pb);