Commit Graph

5 Commits

Author SHA1 Message Date
KongQun Yang 5dd21179ec Do not use harmonic mean in bandwidth calculation
Instead, caclulating average bandwidth by dividing the sum of the
sizes of every segment by the sum of the durations of every segment.
This aligns with the requirement in HLS spec:
https://tools.ietf.org/html/draft-pantos-http-live-streaming-23 4.1.

BandwidthEstimator is also simplified to handle all blocks only.

Fixes #361

Change-Id: I89e7d415a841f4d4048f199de8dae7ffa250467b
2018-07-12 10:46:47 -07:00
KongQun Yang 6b4a75b6ba Changed to use BandwidthEstimator in MediaPlaylist
Preparing for addressing #361.

Change-Id: I4b2e834948e681bc790efc61b63a24d44f70015d
2018-06-22 11:12:23 -07:00
KongQun Yang 43be3c8e8b Use max bitrate in Representation@bandwidth instead of average bitrate
According to DASH spec (23009-1:2014):

Consider a hypothetical constant bitrate channel of
bandwidth with the value of this attribute in bits per second
(bps). Then, if the Representation is continuously delivered
at this bitrate, starting at any SAP that is indicated either by
@startwithsap or by any Segment Index box, a client can
be assured of having enough data for continuous playout
providing playout begins after @minbuffertime *
@bandwidth bits have been received (i.e. at time
@minbuffertime after the first bit is received).
For dependent Representations this value specifies the
bandwidth according to the above definition for the
aggregation of this Representation and all complementary
Representations.

This suggests that max bitrate should be used instead of average
bitrate.

Also cleaned up BandwidthEstimator code.

Fixes #376.

Change-Id: Ibf5896394c5c6bb820849771a2129c59202d2273
2018-04-17 22:39:58 +00:00
KongQun Yang 15ae26e12f Modify include headers to have "packager" in the path
This is a follow up to previous CL.

Generated using command:
find {media,app,mpd} -type f -exec sed -r -i 's/#include "(.*)"/#include
"packager\/\1"/' {} \;

common.gypi and mpd.gyp are also modified to take the path change into
consideration.

Change-Id: I1fb102b4eb73ae5fde5f4ab303a12cec09b05c33
2014-10-02 12:53:29 -07:00
KongQun Yang b8126bc9da Move source code into packager directory
Make it easier to be included and integrated into other code.

Change-Id: I609881688cc20f8fac676cbd91fde4753af32ee5
2014-10-02 12:32:14 -07:00