[Gnash-commit] [bug #45722] Gnash emitted loud screech after playing PCM audio object

[Nutchanon Wetchasit]

Follow-up Comment #12, bug #45722 (project gnash):

>From result in previous posts, it seems that both Gnash's media codec
handler backend (FFmpeg and GStreamer-based) have a problem on incremental
decoding of _uncompressed PCM audio_. The issue is caused by either:

* PCM decoder does not consume source data in a block size that is rounded to
frame boundary. Or...
* PCM decoder does not keep the remainder byte(s) for decoding in the next
go.
 
This issue _surfaced_ when the decoder is requested to read in a block that
is
not a multiple of frame size
<http://git.savannah.gnu.org/cgit/gnash.git/commit/?id=7a53cb38d4b3f8a8f6160a40e2912133663c1ab3>,
resulting in misalignment, thus nasty screech
are being decoded instead of desired sound in the second decoder call
(and so on).

Fixing the second issue (by keeping the remainder bytes in the decoder for
use
in the next try) would make the incremental decoding works even when
the requested chunk size is as small as 1 byte.

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