forked from pool/spandsp
23303cf5e5
For some reason, I missed to submit this. It's tested thoughoutly, and works very well so far.. - add patch spandsp-handle-international-dialstring-prefix.diff in order to support the international dialing prefix - apply patch spandsp-raise-traintime-tolerance.diff as supplied with iaxmodem OBS-URL: https://build.opensuse.org/request/show/714181 OBS-URL: https://build.opensuse.org/package/show/network:telephony/spandsp?expand=0&rev=34
21 lines
1.2 KiB
Diff
21 lines
1.2 KiB
Diff
Raise v17 training time tolerance, as found in iaxmodem supplied spandsp.
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diff -up -r spandsp-0.0.6/src/v17rx.c ../iaxmodem/iaxmodem-1.3.0/lib/spandsp/src/v17rx.c
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--- a/src/v17rx.c 2016-02-07 02:24:28.000000000 +0100
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+++ b/src/v17rx.c 2014-06-30 18:21:39.000000000 +0200
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@@ -1046,10 +1046,10 @@ static void process_half_baud(v17_rx_sta
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s->carrier_track_i = 100.0f;
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s->carrier_track_p = 500000.0f;
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#endif
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- /* TODO: This was increased by a factor of 10 after studying real world failures.
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- However, it is not clear why this is an improvement, If something gives
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- a huge training error, surely it shouldn't decode too well? */
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- if (s->training_error < (V17_TRAINING_SHORT_SEG_2_LEN - 8)*4.0f*constellation_spacing[s->space_map])
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+ /* We need to be liberally accepting of poor fast-train training errors here.
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+ Doing this affords the DTE the opportunity to make some use of whatever
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+ valid Phase C data can be decoded. */
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+ if (s->training_error < (V17_TRAINING_SHORT_SEG_2_LEN - 8)*10.0f*constellation_spacing[s->space_map])
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{
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s->training_count = 0;
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if (s->bits_per_symbol == 2)
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