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hlsdemux: correct the calculation of seek range of non-live streams

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The seek range calculation for on-demand streams was incorrectly
excluding the last three segments of the stream. This three segment
rule should only be applied to live streams [1].

[1] https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-6.3.3

https://bugzilla.gnome.org/show_bug.cgi?id=758386
This commit is contained in:
Alex Ashley 2015-11-10 16:19:34 +00:00 committed by Sebastian Dröge
parent ce67e8934d
commit 0745d567a7
2 changed files with 19 additions and 4 deletions
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12
ext/hls/m3u8.c
View file

@ -1345,6 +1345,7 @@ gst_m3u8_client_get_seek_range (GstM3U8Client * client, gint64 * start,
GList *walk;
GstM3U8MediaFile *file;
guint count;
guint min_distance = 0;
g_return_val_if_fail (client != NULL, FALSE);
@ -1355,13 +1356,16 @@ gst_m3u8_client_get_seek_range (GstM3U8Client * client, gint64 * start,
return FALSE;
}
if (GST_M3U8_CLIENT_IS_LIVE (client)) {
/* min_distance is used to make sure the seek range is never closer than
GST_M3U8_LIVE_MIN_FRAGMENT_DISTANCE fragments from the end of a live
playlist - see 6.3.3. "Playing the Playlist file" of the HLS draft */
min_distance = GST_M3U8_LIVE_MIN_FRAGMENT_DISTANCE;
}
count = g_list_length (client->current->files);
/* count is used to make sure the seek range is never closer than
GST_M3U8_LIVE_MIN_FRAGMENT_DISTANCE fragments from the end of the
playlist - see 6.3.3. "Playing the Playlist file" of the HLS draft */
for (walk = client->current->files;
walk && count >= GST_M3U8_LIVE_MIN_FRAGMENT_DISTANCE; walk = walk->next) {
walk && count >= min_distance; walk = walk->next) {
file = walk->data;
--count;
duration += file->duration;

11
tests/check/elements/hlsdemux_m3u8.c
View file

@ -511,6 +511,8 @@ GST_START_TEST (test_live_playlist)
GstM3U8Client *client;
GstM3U8 *pl;
GstM3U8MediaFile *file;
gint64 start = -1;
gint64 stop = -1;
client = load_playlist (LIVE_PLAYLIST);
@ -530,6 +532,9 @@ GST_START_TEST (test_live_playlist)
assert_equals_string (file->uri,
"https://priv.example.com/fileSequence2683.ts");
assert_equals_int (file->sequence, 2683);
fail_unless (gst_m3u8_client_get_seek_range (client, &start, &stop));
assert_equals_int64 (start, 0);
assert_equals_float (stop / (double) GST_SECOND, 16.0);
gst_m3u8_client_free (client);
}
@ -573,6 +578,8 @@ GST_START_TEST (test_playlist_with_doubles_duration)
GstM3U8Client *client;
GstM3U8 *pl;
GstM3U8MediaFile *file;
gint64 start = -1;
gint64 stop = -1;
client = load_playlist (DOUBLES_PLAYLIST);
@ -586,6 +593,10 @@ GST_START_TEST (test_playlist_with_doubles_duration)
assert_equals_float (file->duration / (double) GST_SECOND, 10.2344);
file = GST_M3U8_MEDIA_FILE (g_list_nth_data (pl->files, 3));
assert_equals_float (file->duration / (double) GST_SECOND, 9.92);
fail_unless (gst_m3u8_client_get_seek_range (client, &start, &stop));
assert_equals_int64 (start, 0);
assert_equals_float (stop / (double) GST_SECOND,
10.321 + 9.6789 + 10.2344 + 9.92);
gst_m3u8_client_free (client);
}