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Fixes for DTC handling in the T.38 gateway

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Steve Underwood committed 2014-07-28 23:35:06 +08:00
1 parent 4c2b84e89e
commit 8d818c3be7
5 files changed
+23 -21
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libs/spandsp/src/dtmf.c
+3 -3
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@@ -68,8 +68,6 @@
#define DEFAULT_DTMF_TX_ON_TIME 50
#define DEFAULT_DTMF_TX_OFF_TIME 55
#define DTMF_SAMPLES_PER_BLOCK 102
#if defined(SPANDSP_USE_FIXED_POINT)
/* The fixed point version scales the 16 bit signal down by 7 bits, so the Goertzels will fit in a 32 bit word */
#define FP_SCALE(x) ((int16_t) (x/128.0 + ((x >= 0.0) ? 0.5 : -0.5)))
@@ -80,6 +78,7 @@
#define DTMF_RELATIVE_PEAK_COL 6.309f /* 8dB [10.0^(8.0/10.0)] */
#define DTMF_TO_TOTAL_ENERGY 83.868f /* -0.85dB [DTMF_SAMPLES_PER_BLOCK*10^(-0.85/10.0)] */
#define DTMF_POWER_OFFSET 68.251f /* 10*log(((32768.0/128.0)^2)*DTMF_SAMPLES_PER_BLOCK) */
#define DTMF_SAMPLES_PER_BLOCK 102
#else
#define FP_SCALE(x) (x)
#define DTMF_THRESHOLD 171032462.0f /* -42dBm0 [((DTMF_SAMPLES_PER_BLOCK*32768.0/1.4142)*10^((-42 - DBM0_MAX_SINE_POWER)/20.0))^2] */
@@ -89,6 +88,7 @@
#define DTMF_RELATIVE_PEAK_COL 6.309f /* 8dB [10.0^(8.0/10.0)] */
#define DTMF_TO_TOTAL_ENERGY 83.868f /* -0.85dB [DTMF_SAMPLES_PER_BLOCK*10^(-0.85/10.0)] */
#define DTMF_POWER_OFFSET 110.395f /* 10*log((32768.0^2)*DTMF_SAMPLES_PER_BLOCK) */
#define DTMF_SAMPLES_PER_BLOCK 102
#endif
static const float dtmf_row[] =
@@ -604,7 +604,7 @@ SPAN_DECLARE(int) dtmf_tx_release(dtmf_tx_state_t *s)
SPAN_DECLARE(int) dtmf_tx_free(dtmf_tx_state_t *s)
{
queue_release(&s->queue.queue);
dtmf_tx_release(s);
span_free(s);
return 0;
}