lavc: add a convenience function for rescaling timestamps in a packet

1 files changed, 13 insertions, 0 deletions

diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c
index 052aaf8638..25eabdb215 100644
--- a/libavcodec/avpacket.c
+++ b/libavcodec/avpacket.c
@@ -24,6 +24,7 @@
 #include "libavutil/avassert.h"
 #include "libavutil/common.h"
 #include "libavutil/internal.h"
+#include "libavutil/mathematics.h"
 #include "libavutil/mem.h"
 #include "avcodec.h"
 #if FF_API_DESTRUCT_PACKET
@@ -380,3 +381,15 @@ void av_packet_move_ref(AVPacket *dst, AVPacket *src)
     *dst = *src;
     av_init_packet(src);
 }
+
+void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
+{
+    if (pkt->pts != AV_NOPTS_VALUE)
+        pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb);
+    if (pkt->dts != AV_NOPTS_VALUE)
+        pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb);
+    if (pkt->duration > 0)
+        pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb);
+    if (pkt->convergence_duration > 0)
+        pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb);
+}