Module: libav Branch: master Commit: 310cc4bf82824f09bdd0b9147ed725cdbeaf9bdd
Author: Martin Storsjö <[email protected]> Committer: Martin Storsjö <[email protected]> Date: Sat Aug 17 16:42:23 2013 +0100 smoothstreamingenc: Write to a temp file while updating the manifest If a client tries to read the file while it's being updated, the client would get an incomplete manifest. Instead write to a separate temp file and atomically rename it to replace the previous one. Signed-off-by: Martin Storsjö <[email protected]> --- libavformat/smoothstreamingenc.c | 8 +++++--- 1 files changed, 5 insertions(+), 3 deletions(-) diff --git a/libavformat/smoothstreamingenc.c b/libavformat/smoothstreamingenc.c index d26af05..7007264 100644 --- a/libavformat/smoothstreamingenc.c +++ b/libavformat/smoothstreamingenc.c @@ -210,14 +210,15 @@ static int write_manifest(AVFormatContext *s, int final) { SmoothStreamingContext *c = s->priv_data; AVIOContext *out; - char filename[1024]; + char filename[1024], temp_filename[1024]; int ret, i, video_chunks = 0, audio_chunks = 0, video_streams = 0, audio_streams = 0; int64_t duration = 0; snprintf(filename, sizeof(filename), "%s/Manifest", s->filename); - ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL); + snprintf(temp_filename, sizeof(temp_filename), "%s/Manifest.tmp", s->filename); + ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL); if (ret < 0) { - av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", filename); + av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename); return ret; } avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); @@ -278,6 +279,7 @@ static int write_manifest(AVFormatContext *s, int final) avio_printf(out, "</SmoothStreamingMedia>\n"); avio_flush(out); avio_close(out); + rename(temp_filename, filename); return 0; } _______________________________________________ libav-commits mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-commits
