[FFmpeg-devel] [PATCH 1/1] add option in file.c: pkt_size to set max_packet_size

[1441923451 at qq.com]

From: yangsen5 <1441923451 at qq.com>

Signed-off-by: yangsen5 <1441923451 at qq.com>
---
 libavformat/file.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavformat/file.c b/libavformat/file.c
index 6a66040b65..8099a7e931 100644
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -94,6 +94,7 @@ typedef struct FileContext {
     int fd;
     int trunc;
     int blocksize;
+    int pkt_size;
     int follow;
     int seekable;
 #if HAVE_DIRENT_H
@@ -106,6 +107,7 @@ static const AVOption file_options[] = {
     { "blocksize", "set I/O operation maximum block size", offsetof(FileContext, blocksize), AV_OPT_TYPE_INT, { .i64 = INT_MAX }, 1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
     { "follow", "Follow a file as it is being written", offsetof(FileContext, follow), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
     { "seekable", "Sets if the file is seekable", offsetof(FileContext, seekable), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
+    { "pkt_size", "Maximum file packet size", offsetof(FileContext, pkt_size), AV_OPT_TYPE_INT, { .i64 = 262144 }, -1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
     { NULL }
 };
 
@@ -313,7 +315,7 @@ static int file_open(URLContext *h, const char *filename, int flags)
     /* Buffer writes more than the default 32k to improve throughput especially
      * with networked file systems */
     if (!h->is_streamed && flags & AVIO_FLAG_WRITE)
-        h->min_packet_size = h->max_packet_size = 262144;
+        h->min_packet_size = h->max_packet_size = c->pkt_size;
 
     if (c->seekable >= 0)
         h->is_streamed = !c->seekable;
-- 
2.34.1