avformat/utils: inject audio skip side data before the side data merge code

This ensures that its handled the same way as other side data
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/utils.c

@@ -1398,6 +1398,18 @@ static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
     if (!got_packet && s->parse_queue)
         ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
 
+    if (ret >= 0) {
+        AVStream *st = s->streams[pkt->stream_index];
+        if (st->skip_samples) {
+            uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
+            if (p) {
+                AV_WL32(p, st->skip_samples);
+                av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
+            }
+            st->skip_samples = 0;
+        }
+    }
+
     if(ret >= 0 && !(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
         av_packet_merge_side_data(pkt);
 
@@ -1490,15 +1502,6 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt)
 return_packet:
 
     st = s->streams[pkt->stream_index];
-    if (st->skip_samples) {
-        uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
-        if (p) {
-            AV_WL32(p, st->skip_samples);
-            av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
-        }
-        st->skip_samples = 0;
-    }
-
     if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
         ff_reduce_index(s, st->index);
         av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);

tests/ref/seek/acodec-mp2

 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   417
 ret: 0         st:-1 flags:0  ts:-1.000000
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   417
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   440
 ret: 0         st:-1 flags:1  ts: 1.894167
 ret: 0         st: 0 flags:1 dts: 1.880816 pts: 1.880816 pos:  30093 size:   418
 ret: 0         st: 0 flags:0  ts: 0.788334
@@ -18,7 +18,7 @@ ret: 0         st: 0 flags:1 dts: 2.168163 pts: 2.168163 pos:  34690 size:   418
 ret: 0         st:-1 flags:1  ts: 1.047503
 ret: 0         st: 0 flags:1 dts: 1.044898 pts: 1.044898 pos:  16718 size:   418
 ret: 0         st: 0 flags:0  ts:-0.058330
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   417
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   440
 ret: 0         st: 0 flags:1  ts: 2.835837
 ret: 0         st: 0 flags:1 dts: 2.821224 pts: 2.821224 pos:  45139 size:   418
 ret: 0         st:-1 flags:0  ts: 1.730004
@@ -26,7 +26,7 @@ ret: 0         st: 0 flags:1 dts: 1.750204 pts: 1.750204 pos:  28003 size:   418
 ret: 0         st:-1 flags:1  ts: 0.624171
 ret: 0         st: 0 flags:1 dts: 0.600816 pts: 0.600816 pos:   9613 size:   418
 ret: 0         st: 0 flags:0  ts:-0.481662
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   417
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   440
 ret: 0         st: 0 flags:1  ts: 2.412505
 ret: 0         st: 0 flags:1 dts: 2.403265 pts: 2.403265 pos:  38452 size:   418
 ret: 0         st:-1 flags:0  ts: 1.306672
@@ -34,7 +34,7 @@ ret: 0         st: 0 flags:1 dts: 1.332245 pts: 1.332245 pos:  21315 size:   418
 ret: 0         st:-1 flags:1  ts: 0.200839
 ret: 0         st: 0 flags:1 dts: 0.182857 pts: 0.182857 pos:   2925 size:   418
 ret: 0         st: 0 flags:0  ts:-0.904994
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   417
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:   440
 ret: 0         st: 0 flags:1  ts: 1.989173
 ret: 0         st: 0 flags:1 dts: 1.985306 pts: 1.985306 pos:  31764 size:   418
 ret: 0         st:-1 flags:0  ts: 0.883340