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[FFmpeg-devel,V1,2/2] lavf/utils: fix error like "offset 0x1f85: partial file"

Message ID 1565263941-20590-2-git-send-email-mypopydev@gmail.com
State Accepted
Commit 9c3adb7ce23522dcceb264bc0bffd3592dd3e1a5
Headers show

Commit Message

Jun Zhao Aug. 8, 2019, 11:32 a.m. UTC 
From: tomajsjiang <tomajsjiang@tencent.com>

fix error like "offset 0x1f85: partial file", the root cause is when
read the mp4 file from http, and the moov in the end of the mp4 file,
reconfig the buffer will drop some data.

Signed-off-by: Jun Zhao <barryjzhao@tencent.com>
Signed-off-by: Zhongxing Jiang <tomajsjiang@tencent.com>
---
 libavformat/utils.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
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Patch

diff --git a/libavformat/utils.c b/libavformat/utils.c
index 6c6f4e1..b57e680 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2136,7 +2136,13 @@  void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
     /* XXX This could be adjusted depending on protocol*/
     if (s->pb->buffer_size < pos_delta && pos_delta < (1<<24)) {
         av_log(s, AV_LOG_VERBOSE, "Reconfiguring buffers to size %"PRId64"\n", pos_delta);
-        ffio_set_buf_size(s->pb, pos_delta);
+
+        /* realloc the buffer and the original data will be retained */
+        if (ffio_realloc_buf(s->pb, pos_delta)) {
+            av_log(s, AV_LOG_ERROR, "Realloc buffer fail.\n");
+            return;
+        }
+
         s->pb->short_seek_threshold = FFMAX(s->pb->short_seek_threshold, pos_delta/2);
     }