Revert "lavf/dashenc: Write media trailers when DASH trailer is written."

This reverts commit e444b3b184.
Causing build error due to rebasing. Sorry for about it.

libavformat/dashenc.c

@@ -441,6 +441,8 @@ static void dash_free(AVFormatContext *s)
         return;
     for (i = 0; i < s->nb_streams; i++) {
         OutputStream *os = &c->streams[i];
+        if (os->ctx && os->ctx_inited)
+            av_write_trailer(os->ctx);
         if (os->ctx && os->ctx->pb)
             ffio_free_dyn_buf(&os->ctx->pb);
         ff_format_io_close(s, &os->out);
@@ -1357,47 +1359,6 @@ static void dashenc_delete_file(AVFormatContext *s, char *filename) {
     }
 }
 
-static int dashenc_delete_segment_file(AVFormatContext *s, const char* file)
-{
-    DASHContext *c = s->priv_data;
-    size_t dirname_len, file_len;
-    char filename[1024];
-
-    dirname_len = strlen(c->dirname);
-    if (dirname_len >= sizeof(filename)) {
-        av_log(s, AV_LOG_WARNING, "Cannot delete segments as the directory path is too long: %"PRIu64" characters: %s\n",
-            (uint64_t)dirname_len, c->dirname);
-        return AVERROR(ENAMETOOLONG);
-    }
-
-    memcpy(filename, c->dirname, dirname_len);
-
-    file_len = strlen(file);
-    if ((dirname_len + file_len) >= sizeof(filename)) {
-        av_log(s, AV_LOG_WARNING, "Cannot delete segments as the path is too long: %"PRIu64" characters: %s%s\n",
-            (uint64_t)(dirname_len + file_len), c->dirname, file);
-        return AVERROR(ENAMETOOLONG);
-    }
-
-    memcpy(filename + dirname_len, file, file_len + 1); // include the terminating zero
-    dashenc_delete_file(s, filename);
-
-    return 0;
-}
-
-static inline void dashenc_delete_media_segments(AVFormatContext *s, OutputStream *os, int remove_count)
-{
-    for (int i = 0; i < remove_count; ++i) {
-        dashenc_delete_segment_file(s, os->segments[i]->file);
-
-        // Delete the segment regardless of whether the file was successfully deleted
-        av_free(os->segments[i]);
-    }
-
-    os->nb_segments -= remove_count;
-    memmove(os->segments, os->segments + remove_count, os->nb_segments * sizeof(*os->segments));
-}
-
 static int dash_flush(AVFormatContext *s, int final, int stream)
 {
     DASHContext *c = s->priv_data;
@@ -1487,12 +1448,23 @@ static int dash_flush(AVFormatContext *s, int final, int stream)
         os->pos += range_length;
     }
 
-    if (c->window_size) {
+    if (c->window_size || (final && c->remove_at_exit)) {
         for (i = 0; i < s->nb_streams; i++) {
             OutputStream *os = &c->streams[i];
-            int remove_count = os->nb_segments - c->window_size - c->extra_window_size;
-            if (remove_count > 0)
-                dashenc_delete_media_segments(s, os, remove_count);
+            int j;
+            int remove = os->nb_segments - c->window_size - c->extra_window_size;
+            if (final && c->remove_at_exit)
+                remove = os->nb_segments;
+            if (remove > 0) {
+                for (j = 0; j < remove; j++) {
+                    char filename[1024];
+                    snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->segments[j]->file);
+                    dashenc_delete_file(s, filename);
+                    av_free(os->segments[j]);
+                }
+                os->nb_segments -= remove;
+                memmove(os->segments, os->segments + remove, os->nb_segments * sizeof(*os->segments));
+            }
         }
     }
 
@@ -1643,7 +1615,6 @@ static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
 static int dash_write_trailer(AVFormatContext *s)
 {
     DASHContext *c = s->priv_data;
-    int i;
 
     if (s->nb_streams > 0) {
         OutputStream *os = &c->streams[0];
@@ -1659,19 +1630,14 @@ static int dash_write_trailer(AVFormatContext *s)
     }
     dash_flush(s, 1, -1);
 
-    for (i = 0; i < s->nb_streams; ++i) {
-        OutputStream *os = &c->streams[i];
-        if (os->ctx && os->ctx_inited) {
-            av_write_trailer(os->ctx);
-        }
-
-        if (c->remove_at_exit) {
-            dashenc_delete_media_segments(s, os, os->nb_segments);
-            dashenc_delete_segment_file(s, os->initfile);
-        }
-    }
-
     if (c->remove_at_exit) {
+        char filename[1024];
+        int i;
+        for (i = 0; i < s->nb_streams; i++) {
+            OutputStream *os = &c->streams[i];
+            snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
+            dashenc_delete_file(s, filename);
+        }
         dashenc_delete_file(s, s->url);
 
         if (c->hls_playlist && c->master_playlist_created) {