rtpenc: Use AVFormatContext.packet_size instead of a private option

The private option has not been part of any release yet (and
it is only of use in quite rare cases), so just remove it instead
of keeping it with deprecation warnings.
Signed-off-by: NMartin Storsjö <martin@martin.st>

libavformat/rtpenc.c

@@ -33,7 +33,6 @@
 static const AVOption options[] = {
     FF_RTP_FLAG_OPTS(RTPMuxContext, flags)
     { "payload_type", "Specify RTP payload type", offsetof(RTPMuxContext, payload_type), AV_OPT_TYPE_INT, {.dbl = -1 }, -1, 127, AV_OPT_FLAG_ENCODING_PARAM },
-    { "max_packet_size", "Max packet size", offsetof(RTPMuxContext, max_packet_size), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
     { NULL },
 };
 
@@ -110,21 +109,21 @@ static int rtp_write_header(AVFormatContext *s1)
         s->first_rtcp_ntp_time = (s1->start_time_realtime / 1000) * 1000 +
                                  NTP_OFFSET_US;
 
-    if (s->max_packet_size) {
+    if (s1->packet_size) {
         if (s1->pb->max_packet_size)
-            s->max_packet_size = FFMIN(s->max_packet_size,
-                                       s1->pb->max_packet_size);
+            s1->packet_size = FFMIN(s1->packet_size,
+                                    s1->pb->max_packet_size);
     } else
-        s->max_packet_size = s1->pb->max_packet_size;
-    if (s->max_packet_size <= 12) {
-        av_log(s1, AV_LOG_ERROR, "Max packet size %d too low\n", s->max_packet_size);
+        s1->packet_size = s1->pb->max_packet_size;
+    if (s1->packet_size <= 12) {
+        av_log(s1, AV_LOG_ERROR, "Max packet size %d too low\n", s1->packet_size);
         return AVERROR(EIO);
     }
-    s->buf = av_malloc(s->max_packet_size);
+    s->buf = av_malloc(s1->packet_size);
     if (s->buf == NULL) {
         return AVERROR(ENOMEM);
     }
-    s->max_payload_size = s->max_packet_size - 12;
+    s->max_payload_size = s1->packet_size - 12;
 
     s->max_frames_per_packet = 0;
     if (s1->max_delay) {

libavformat/rtpenc.h

@@ -34,7 +34,6 @@ struct RTPMuxContext {
     uint32_t timestamp;
     uint32_t base_timestamp;
     uint32_t cur_timestamp;
-    int max_packet_size;
     int max_payload_size;
     int num_frames;