diff options
Diffstat (limited to 'ffmpeg-Speed_up_wtv_index_creation.patch')
| -rw-r--r-- | ffmpeg-Speed_up_wtv_index_creation.patch | 47 |
1 files changed, 0 insertions, 47 deletions
diff --git a/ffmpeg-Speed_up_wtv_index_creation.patch b/ffmpeg-Speed_up_wtv_index_creation.patch deleted file mode 100644 index d8298982949c..000000000000 --- a/ffmpeg-Speed_up_wtv_index_creation.patch +++ /dev/null @@ -1,47 +0,0 @@ -commit 0e7427498cb1131671f6fe9d054245ae7e5a36f5 -Author: popcornmix <popcornmix@gmail.com> -Date: Tue Mar 25 19:43:07 2014 +0000 - - [ffmpeg] Speed up wtv index creation - - The index creation is O(N^2) with number of entries (typically thousands). - On a Pi this can take more than 60 seconds to execute for a recording of a few hours. - - By replacing with an O(N) loop, this takes virtually zero time - -diff --git a/libavformat/wtvdec.c b/libavformat/wtvdec.c -index e423370..70898bd 100644 ---- a/libavformat/wtvdec.c -+++ b/libavformat/wtvdec.c -@@ -980,21 +980,23 @@ static int read_header(AVFormatContext *s) - pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16); - if (pb) { - int i; -+ AVIndexEntry *e = wtv->index_entries; -+ AVIndexEntry *e_end = wtv->index_entries + wtv->nb_index_entries - 1; -+ uint64_t last_position = 0; - while (1) { - uint64_t frame_nb = avio_rl64(pb); - uint64_t position = avio_rl64(pb); -+ while (frame_nb > e->size && e <= e_end) { -+ e->pos = last_position; -+ e++; -+ } - if (avio_feof(pb)) - break; -- for (i = wtv->nb_index_entries - 1; i >= 0; i--) { -- AVIndexEntry *e = wtv->index_entries + i; -- if (frame_nb > e->size) -- break; -- if (position > e->pos) -- e->pos = position; -- } -+ last_position = position; - } -+ e_end->pos = last_position; - wtvfile_close(pb); -- st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp; -+ st->duration = e_end->timestamp; - } - } - } |