[FFmpeg-devel] [PATCH 3/6] avformat: remove uneeded avio_flush() calls from the end of write_trailer functions

[Marton Balint]

The IO context is always flushed by libavformat/mux.c after write_trailer is
called, so this change should have no effect at all.
---
 libavformat/aiffenc.c    | 2 --
 libavformat/astenc.c     | 1 -
 libavformat/au.c         | 1 -
 libavformat/cafenc.c     | 1 -
 libavformat/flacenc.c    | 1 -
 libavformat/hashenc.c    | 1 -
 libavformat/mmf.c        | 2 --
 libavformat/mpegenc.c    | 1 -
 libavformat/soxenc.c     | 2 --
 libavformat/ttaenc.c     | 1 -
 libavformat/vc1testenc.c | 1 -
 libavformat/wavenc.c     | 2 --
 libavformat/wtvenc.c     | 2 --
 13 files changed, 18 deletions(-)

diff --git a/libavformat/aiffenc.c b/libavformat/aiffenc.c
index ec2c7db09a..0145596bec 100644
--- a/libavformat/aiffenc.c
+++ b/libavformat/aiffenc.c
@@ -263,8 +263,6 @@ static int aiff_write_trailer(AVFormatContext *s)
         file_size = avio_tell(pb);
         avio_seek(pb, aiff->form, SEEK_SET);
         avio_wb32(pb, file_size - aiff->form - 4);
-
-        avio_flush(pb);
     }
 
     return ret;
diff --git a/libavformat/astenc.c b/libavformat/astenc.c
index d38a3aab38..e0b94b8b63 100644
--- a/libavformat/astenc.c
+++ b/libavformat/astenc.c
@@ -178,7 +178,6 @@ static int ast_write_trailer(AVFormatContext *s)
         }
 
         avio_seek(pb, file_size, SEEK_SET);
-        avio_flush(pb);
     }
     return 0;
 }
diff --git a/libavformat/au.c b/libavformat/au.c
index 19a0f56963..4afee85a94 100644
--- a/libavformat/au.c
+++ b/libavformat/au.c
@@ -326,7 +326,6 @@ static int au_write_trailer(AVFormatContext *s)
         avio_seek(pb, 8, SEEK_SET);
         avio_wb32(pb, (uint32_t)(file_size - au->header_size));
         avio_seek(pb, file_size, SEEK_SET);
-        avio_flush(pb);
     }
 
     return 0;
diff --git a/libavformat/cafenc.c b/libavformat/cafenc.c
index 8fe1dcef19..98d4d9212f 100644
--- a/libavformat/cafenc.c
+++ b/libavformat/cafenc.c
@@ -258,7 +258,6 @@ static int caf_write_trailer(AVFormatContext *s)
             avio_write(pb, caf->pkt_sizes, caf->size_entries_used);
             caf->size_buffer_size = 0;
         }
-        avio_flush(pb);
     }
     av_freep(&caf->pkt_sizes);
     return 0;
diff --git a/libavformat/flacenc.c b/libavformat/flacenc.c
index abbed38f89..1aae0c97e0 100644
--- a/libavformat/flacenc.c
+++ b/libavformat/flacenc.c
@@ -349,7 +349,6 @@ static int flac_write_trailer(struct AVFormatContext *s)
         avio_seek(pb, 8, SEEK_SET);
         avio_write(pb, streaminfo, FLAC_STREAMINFO_SIZE);
         avio_seek(pb, file_size, SEEK_SET);
-        avio_flush(pb);
     } else {
         av_log(s, AV_LOG_WARNING, "unable to rewrite FLAC header.\n");
     }
diff --git a/libavformat/hashenc.c b/libavformat/hashenc.c
index 34a8fd1f50..ddc67f53b5 100644
--- a/libavformat/hashenc.c
+++ b/libavformat/hashenc.c
@@ -152,7 +152,6 @@ static int hash_write_trailer(struct AVFormatContext *s)
         av_hash_final_hex(c->hashes[i], buf + strlen(buf), sizeof(buf) - strlen(buf));
         av_strlcatf(buf, sizeof(buf), "\n");
         avio_write(s->pb, buf, strlen(buf));
-        avio_flush(s->pb);
     }
 
     return 0;
diff --git a/libavformat/mmf.c b/libavformat/mmf.c
index 4e087fc920..e4768db064 100644
--- a/libavformat/mmf.c
+++ b/libavformat/mmf.c
@@ -171,8 +171,6 @@ static int mmf_write_trailer(AVFormatContext *s)
         avio_write(pb, "\x00\x00\x00\x00", 4);
 
         avio_seek(pb, pos, SEEK_SET);
-
-        avio_flush(pb);
     }
     return 0;
 }
diff --git a/libavformat/mpegenc.c b/libavformat/mpegenc.c
index f6980231a2..f8039a42c0 100644
--- a/libavformat/mpegenc.c
+++ b/libavformat/mpegenc.c
@@ -1244,7 +1244,6 @@ static int mpeg_mux_end(AVFormatContext *ctx)
      * it as it is usually not needed by decoders and because it
      * complicates MPEG stream concatenation. */
     // avio_wb32(ctx->pb, ISO_11172_END_CODE);
-    // avio_flush(ctx->pb);
 
     for (i = 0; i < ctx->nb_streams; i++) {
         stream = ctx->streams[i]->priv_data;
diff --git a/libavformat/soxenc.c b/libavformat/soxenc.c
index 7259131b03..ce276f88b5 100644
--- a/libavformat/soxenc.c
+++ b/libavformat/soxenc.c
@@ -99,8 +99,6 @@ static int sox_write_trailer(AVFormatContext *s)
         } else
             avio_wb64(pb, num_samples);
         avio_seek(pb, file_size, SEEK_SET);
-
-        avio_flush(pb);
     }
 
     return 0;
diff --git a/libavformat/ttaenc.c b/libavformat/ttaenc.c
index 73c29ae936..4860aab4c1 100644
--- a/libavformat/ttaenc.c
+++ b/libavformat/ttaenc.c
@@ -154,7 +154,6 @@ static int tta_write_trailer(AVFormatContext *s)
     tta_queue_flush(s);
 
     ff_ape_write_tag(s);
-    avio_flush(s->pb);
 
     return 0;
 }
diff --git a/libavformat/vc1testenc.c b/libavformat/vc1testenc.c
index cf95d1d80d..1365bdd660 100644
--- a/libavformat/vc1testenc.c
+++ b/libavformat/vc1testenc.c
@@ -76,7 +76,6 @@ static int vc1test_write_trailer(AVFormatContext *s)
     if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         avio_seek(pb, 0, SEEK_SET);
         avio_wl24(pb, ctx->frames);
-        avio_flush(pb);
     }
     return 0;
 }
diff --git a/libavformat/wavenc.c b/libavformat/wavenc.c
index c44d6d26e9..ea7573139c 100644
--- a/libavformat/wavenc.c
+++ b/libavformat/wavenc.c
@@ -478,7 +478,6 @@ static int wav_write_trailer(AVFormatContext *s)
             avio_wl32(pb, -1);
 
             avio_seek(pb, file_size, SEEK_SET);
-            avio_flush(pb);
         }
     }
 
@@ -605,7 +604,6 @@ static int w64_write_trailer(AVFormatContext *s)
         }
 
         avio_seek(pb, file_size, SEEK_SET);
-        avio_flush(pb);
     }
 
     return 0;
diff --git a/libavformat/wtvenc.c b/libavformat/wtvenc.c
index 4a68b8133f..498bc64019 100644
--- a/libavformat/wtvenc.c
+++ b/libavformat/wtvenc.c
@@ -823,8 +823,6 @@ static int write_trailer(AVFormatContext *s)
     avio_seek(pb, 0x5c, SEEK_SET);
     avio_wl32(pb, file_end_pos >> WTV_SECTOR_BITS);
 
-    avio_flush(pb);
-
     av_free(wctx->sp_pairs);
     av_free(wctx->st_pairs);
     av_packet_unref(&wctx->thumbnail);
-- 
2.16.4