Use the new AVIOContext destructor.

avprobe.c

@@ -1178,7 +1178,7 @@ int main(int argc, char **argv)
     ret = probe_file(input_filename);
     probe_footer();
     avio_flush(probe_out);
-    av_freep(&probe_out);
+    avio_context_free(&probe_out);
     av_freep(&buffer);
     uninit_opts();
     avformat_network_deinit();

libavformat/avidec.c

@@ -901,7 +901,7 @@ static int read_gab2_sub(AVStream *st, AVPacket *pkt)
         return 1;
 
 error:
-        av_freep(&pb);
+        avio_context_free(&pb);
     }
     return 0;
 }
@@ -1576,7 +1576,7 @@ static int avi_read_close(AVFormatContext *s)
         AVIStream *ast = st->priv_data;
         if (ast) {
             if (ast->sub_ctx) {
-                av_freep(&ast->sub_ctx->pb);
+                avio_context_free(&ast->sub_ctx->pb);
                 avformat_close_input(&ast->sub_ctx);
             }
             av_free(ast->sub_buffer);

libavformat/flac_picture.c

@@ -139,14 +139,14 @@ int ff_flac_parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size)
     if (desc)
         av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
 
-    av_freep(&pb);
+    avio_context_free(&pb);
 
     return 0;
 
 fail:
     av_buffer_unref(&data);
     av_freep(&desc);
-    av_freep(&pb);
+    avio_context_free(&pb);
 
     return ret;
 }

libavformat/hdsenc.c

@@ -143,8 +143,8 @@ static void hds_free(AVFormatContext *s)
             ff_format_io_close(s, &os->out);
         if (os->ctx && os->ctx_inited)
             av_write_trailer(os->ctx);
-        if (os->ctx && os->ctx->pb)
-            av_free(os->ctx->pb);
+        if (os->ctx)
+            avio_context_free(&os->ctx->pb);
         if (os->ctx)
             avformat_free_context(os->ctx);
         av_free(os->metadata);

libavformat/mpjpegdec.c

@@ -102,7 +102,7 @@ static int mpjpeg_read_probe(AVProbeData *p)
         }
     }
 
-    av_free(pb);
+    avio_context_free(&pb);
 
     return ret;
 }

libavformat/rdt.c

@@ -324,7 +324,7 @@ get_cache:
                                   st, rdt->rmst[st->index], pkt);
         if (rdt->audio_pkt_cnt == 0 &&
             st->codecpar->codec_id == AV_CODEC_ID_AAC)
-            av_freep(&rdt->rmctx->pb);
+            avio_context_free(&rdt->rmctx->pb);
     }
     pkt->stream_index = st->index;
     pkt->pts = *timestamp;

libavformat/segment.c

@@ -184,10 +184,10 @@ static int open_null_ctx(AVIOContext **ctx)
     return 0;
 }
 
-static void close_null_ctx(AVIOContext *pb)
+static void close_null_ctx(AVIOContext **pb)
 {
-    av_free(pb->buffer);
-    av_free(pb);
+    av_free((*pb)->buffer);
+    avio_context_free(pb);
 }
 
 static void seg_free_context(SegmentContext *seg)
@@ -259,7 +259,7 @@ static int seg_write_header(AVFormatContext *s)
     }
 
     if (!seg->write_header_trailer) {
-        close_null_ctx(oc->pb);
+        close_null_ctx(&oc->pb);
         if ((ret = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, NULL)) < 0)
             goto fail;
     }
@@ -353,7 +353,7 @@ static int seg_write_trailer(struct AVFormatContext *s)
         if ((ret = open_null_ctx(&oc->pb)) < 0)
             goto fail;
         ret = av_write_trailer(oc);
-        close_null_ctx(oc->pb);
+        close_null_ctx(&oc->pb);
     } else {
         ret = segment_end(oc, 1);
     }

libavformat/smoothstreamingenc.c

@@ -187,8 +187,8 @@ static void ism_free(AVFormatContext *s)
         os->out = os->out2 = os->tail_out = NULL;
         if (os->ctx && os->ctx_inited)
             av_write_trailer(os->ctx);
-        if (os->ctx && os->ctx->pb)
-            av_free(os->ctx->pb);
+        if (os->ctx)
+            avio_context_free(&os->ctx->pb);
         if (os->ctx)
             avformat_free_context(os->ctx);
         av_free(os->private_str);

libavformat/swfdec.c

@@ -310,7 +310,9 @@ static av_cold int swf_read_close(AVFormatContext *avctx)
     inflateEnd(&s->zstream);
     av_freep(&s->zbuf_in);
     av_freep(&s->zbuf_out);
-    av_freep(&s->zpb);
+
+    avio_context_free(&s->zpb);
+
     return 0;
 }
 #endif

libavformat/tests/movenc.c

@@ -338,7 +338,7 @@ static void signal_init_ts(void)
 static void finish(void)
 {
     av_write_trailer(ctx);
-    av_free(ctx->pb);
+    avio_context_free(&ctx->pb);
     avformat_free_context(ctx);
     ctx = NULL;
 }

libavformat/wtv.c

@@ -313,7 +313,7 @@ static void wtvfile_close(AVIOContext *pb)
     av_free(wf->sectors);
     av_free(wf);
     av_free(pb->buffer);
-    av_free(pb);
+    avio_context_free(&pb);
 }
 
 /*