Alec Leamas wrote:
>
>> It is at the beginning of the 2 files (the same):
>>
>> Its setup is:
>> stream : PLAYBACK
>> access : RW_INTERLEAVED
>> format : S16_LE
>> subformat : STD
>> channels : 2
>> rate : 44100
>> exact rate : 44100 (44100/1)
>> msbits : 16
>> buffer_size : 1764
>> period_size : 441
>> period_time : 10000
>> tstamp_mode : NONE
>> period_step : 1
>> avail_min : 441
>> period_event : 0
>> start_threshold : 1
>> stop_threshold : 1764
>> silence_threshold: 0
>> silence_size : 0
>> boundary : 1849688064
>>
>>
> Actually, I thnk I'm wrong. If the buffer is 1764 frames:. Time for 1
> frame = 1/44100 sec = 1000/44100 ms. Time for buffer 1764 * 1000/44100=
> 40 ms. So, it really not that small, and increasing it is a problem.
Looking at the code in PSoundChannelALSA::Write(), where len=1764
/* the number of frames to read is the buffer length
divided by the size of one frame */
r = snd_pcm_writei (os_handle, (char *) &buf2 [pos], len / frameBytes);
I would say 1764 is a number of bytes.
The header file confirms this
virtual PBoolean Write(
const void * buf, ///< Pointer to a block of memory to write.
PINDEX len ///< Number of bytes to write.
);
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