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fix rtl_tcp's default bufferlength for smooth streaming 

fix for commit e6bdc91e99

Signed-off-by: hayati ayguen <h_ayguen@web.de>
master
hayati ayguen 2016-08-30 01:34:50 +02:00 committed by Lucas Teske
parent 582c361066
commit 23ce5dd821
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1 changed files with 7 additions and 5 deletions
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12
src/rtl_tcp.c
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@ -100,7 +100,7 @@ void usage(void)
"\t[-g gain in dB (default: 0 for auto)]\n"
"\t[-s samplerate in Hz (default: 2048000 Hz)]\n"
"\t[-b number of buffers (default: 15, set by library)]\n"
"\t[-l length of single buffer in units of 512 samples (default: 64 was 256)]\n"
"\t[-l length of single buffer in units of 512 samples (default: 32 was 256)]\n"
"\t[-n max number of linked list buffers to keep (default: 500)]\n"
"\t[-w rtlsdr tuner bandwidth [Hz] (for R820T and E4000 tuners)]\n"
"\t[-d device index (default: 0)]\n"
@ -467,15 +467,17 @@ int main(int argc, char **argv)
struct sockaddr_in local, remote;
uint32_t buf_num = 0;
/* buf_len:
* -> 256 -> 262 ms @ 250 kS or 20.48 ms @ 3.2 MS (internal default)
* -> 128 -> 131 ms @ 250 kS or 10.24 ms @ 3.2 MS
* -> 64 -> 65 ms @ 250 kS or 5.12 ms @ 3.2 MS (new default)
* must be multiple of 512 - else it will be overwritten
* in rtlsdr_read_async() in librtlsdr.c with DEFAULT_BUF_LENGTH (= 16*32 *512 = 512 *512)
*
* -> 512*512 -> 1048 ms @ 250 kS or 81.92 ms @ 3.2 MS (internal default)
* -> 32*512 -> 65 ms @ 250 kS or 5.12 ms @ 3.2 MS (new default)
*
* usual soundcard as reference:
* 512 samples @ 48 kHz ~= 10.6 ms
* 512 samples @ 8 kHz = 64 ms
*/
uint32_t buf_len = 64;
uint32_t buf_len = 32 * 512;
int dev_index = 0;
int dev_given = 0;
int gain = 0;