[ lame-Bugs-3551484 ] Bad mono encoding when using the interleaved functions

Bugs item #3551484, was opened at 2012-07-29 11:28
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Category: Libraries
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: ortalz ()
Assigned to: Nobody/Anonymous (nobody)
Summary: Bad mono encoding when using the interleaved functions

Initial Comment:
When using the interleaved functions  (such as lame_encode_buffer_interleaved) for encoding a mono stream, bad output is coming out. 
Further investigation lead to a problem in lame_encode_buffer_template. When cfg->channels_in == 1, it calls lame_copy_inbuffer(gfc, buffer_l, buffer_r, nsamples, pcm_type, aa, norm); The value of aa is set to 2 when called from the interleaved functions. The aa parameter is passed on to lame_copy_inbuffer and define the jump value when copying the buffer. Jump value of 2 for mono stream result in skipping each second sample and accessing data beyond the buffer boundaries.

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