989891 - Leverage MediaCache for RTSP

Status: RESOLVED WONTFIX

(Firefox OS Graveyard :: RTSP, defect)

Comment 1

[Benjamin Chen [:bechen]]

Now the rtsp streaming is more stable than before, so we can consider to leverage the MediaCache to re-write the RtspMediaResource.

Obviously the MediaCache is designed for byte-based stream, so we will encounter some problems such as:

1. How to store the data into MediaCache?
- We should maintain a new table when data comes from RtspChannel.
- The table contains: timestamp, frameSize...

2. How to read data from MediaCache?
- |RtspMediaSource| access the table above to know how many bytes should be read.

3. How to handle seek operation?
- Access the table above.
- When seeking forward to an "un-cache" position, the thread should be blocked in MediaCache but we don't know the byte offset of the target time.

4. Rtsp is video/audio separately, how to use MediaCache.
- Create 2 MediaCacheStream?

5. Play a realtime stream.
- Should we still use MediaCache? Or we can fallback to current implementation?

6. A/V sync
- After apply MediaCache, it should be fine if we play a stream without seeking.

Comment 2

[Ethan Tseng [:ethan]]

We should take the buffer size into consideration while rewriting RtspMediaResource to use MediaCache.

Steve Workman has some suggestion here:
https://bugzilla.mozilla.org/show_bug.cgi?id=998239#c6

Comment 3

[BMO Automation]

Firefox OS is not being worked on