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lib: change default number of transfers to 15

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So far we had 32 * 256KB which was a bit overkill,
15 are more than enough.

15 was chosen instead of 16 because at least on Linux
there seems to be a system-wide limit of 63 transfers
(when they are 256KB large), so 4 dongles can be used
on a single machine without lowering the default transfer
number.

Signed-off-by: Steve Markgraf <steve@steve-m.de>
This commit is contained in:
Steve Markgraf
2014-02-10 23:57:19 +01:00
parent 5b0137abaf
commit 89f73b183f
6 changed files with 8 additions and 11 deletions
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5
include/rtl-sdr.h
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@ -351,9 +351,10 @@ RTLSDR_API int rtlsdr_wait_async(rtlsdr_dev_t *dev, rtlsdr_read_async_cb_t cb, v
* \param cb callback function to return received samples
* \param ctx user specific context to pass via the callback function
* \param buf_num optional buffer count, buf_num * buf_len = overall buffer size
* set to 0 for default buffer count (32)
* set to 0 for default buffer count (15)
* \param buf_len optional buffer length, must be multiple of 512,
* set to 0 for default buffer length (16 * 32 * 512)
* should be a multiple of 16384 (URB size), set to 0
* for default buffer length (16 * 32 * 512)
* \return 0 on success
*/
RTLSDR_API int rtlsdr_read_async(rtlsdr_dev_t *dev,