avcodec/packet_internal: Add proper PacketList struct

Up until now, we had a PacketList structure which is actually
a PacketListEntry; a proper PacketList did not exist
and all the related functions just passed pointers to pointers
to the head and tail elements around. All these pointers were
actually consecutive elements of their containing structs,
i.e. the users already treated them as if they were a struct.

So add a proper PacketList struct and rename the current PacketList
to PacketListEntry; also make the functions use this structure
instead of the pair of pointers.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 6 insertions, 7 deletions

diff --git a/libavformat/ttaenc.c b/libavformat/ttaenc.c
index 5f21fdc144..486f8bdd10 100644
--- a/libavformat/ttaenc.c
+++ b/libavformat/ttaenc.c
@@ -30,7 +30,7 @@
 
 typedef struct TTAMuxContext {
     AVIOContext *seek_table;
-    PacketList *queue, *queue_end;
+    PacketList queue;
     uint32_t nb_samples;
     int frame_size;
     int last_frame;
@@ -94,12 +94,11 @@ static int tta_write_packet(AVFormatContext *s, AVPacket *pkt)
     TTAMuxContext *tta = s->priv_data;
     int ret;
 
-    ret = avpriv_packet_list_put(&tta->queue, &tta->queue_end, pkt,
-                                 NULL, 0);
+    ret = avpriv_packet_list_put(&tta->queue, pkt, NULL, 0);
     if (ret < 0) {
         return ret;
     }
-    pkt = &tta->queue_end->pkt;
+    pkt = &tta->queue.tail->pkt;
 
     avio_wl32(tta->seek_table, pkt->size);
     tta->nb_samples += pkt->duration;
@@ -126,8 +125,8 @@ static void tta_queue_flush(AVFormatContext *s)
     TTAMuxContext *tta = s->priv_data;
     AVPacket *const pkt = ffformatcontext(s)->pkt;
 
-    while (tta->queue) {
-        avpriv_packet_list_get(&tta->queue, &tta->queue_end, pkt);
+    while (tta->queue.head) {
+        avpriv_packet_list_get(&tta->queue, pkt);
         avio_write(s->pb, pkt->data, pkt->size);
         av_packet_unref(pkt);
     }
@@ -163,7 +162,7 @@ static void tta_deinit(AVFormatContext *s)
     TTAMuxContext *tta = s->priv_data;
 
     ffio_free_dyn_buf(&tta->seek_table);
-    avpriv_packet_list_free(&tta->queue, &tta->queue_end);
+    avpriv_packet_list_free(&tta->queue);
 }
 
 const AVOutputFormat ff_tta_muxer = {