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Numerous little changes to spandsp that haven't been pushed to Freeswitch for a

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while. The only big changes are a majorly rewritten V.42 and V.42bis which are
now basically functional.
This commit is contained in:
Steve Underwood
2011-07-02 14:45:27 +08:00
parent 6f62f39139
commit d30e82e226
68 changed files with 2517 additions and 2118 deletions
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19
libs/spandsp/src/dds_int.c
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@@ -56,7 +56,7 @@
/* This is a simple set of direct digital synthesis (DDS) functions to generate sine
waves. This version uses a 128 entry sin/cos table to cover one quadrant. */
static const int16_t sine_table[DDS_STEPS] =
static const int16_t sine_table[DDS_STEPS + 1] =
{
201,
603,
@@ -186,6 +186,7 @@ static const int16_t sine_table[DDS_STEPS] =
32753,
32762,
32767,
32767
};
SPAN_DECLARE(int32_t) dds_phase_rate(float frequency)
@@ -220,7 +221,7 @@ SPAN_DECLARE(int16_t) dds_lookup(uint32_t phase)
phase >>= DDS_SHIFT;
step = phase & (DDS_STEPS - 1);
if ((phase & DDS_STEPS))
step = (DDS_STEPS - 1) - step;
step = DDS_STEPS - step;
amp = sine_table[step];
if ((phase & (2*DDS_STEPS)))
amp = -amp;
@@ -254,7 +255,7 @@ SPAN_DECLARE(int16_t) dds_mod(uint32_t *phase_acc, int32_t phase_rate, int16_t s
{
int16_t amp;
amp = (int16_t) (((int32_t) dds_lookup(*phase_acc + phase)*(int32_t) scale) >> 15);
amp = (int16_t) (((int32_t) dds_lookup(*phase_acc + phase)*scale) >> 15);
*phase_acc += phase_rate;
return amp;
}
@@ -280,8 +281,8 @@ SPAN_DECLARE(complexi_t) dds_complexi_mod(uint32_t *phase_acc, int32_t phase_rat
{
complexi_t amp;
amp = complex_seti(((int32_t) dds_lookup(*phase_acc + phase + (1 << 30))*(int32_t) scale) >> 15,
((int32_t) dds_lookup(*phase_acc + phase)*(int32_t) scale) >> 15);
amp = complex_seti(((int32_t) dds_lookup(*phase_acc + phase + (1 << 30))*scale) >> 15,
((int32_t) dds_lookup(*phase_acc + phase)*scale) >> 15);
*phase_acc += phase_rate;
return amp;
}
@@ -307,8 +308,8 @@ SPAN_DECLARE(complexi16_t) dds_complexi16_mod(uint32_t *phase_acc, int32_t phase
{
complexi16_t amp;
amp = complex_seti16((int16_t) (((int32_t) dds_lookup(*phase_acc + phase + (1 << 30))*(int32_t) scale) >> 15),
(int16_t) (((int32_t) dds_lookup(*phase_acc + phase)*(int32_t) scale) >> 15));
amp = complex_seti16((int16_t) (((int32_t) dds_lookup(*phase_acc + phase + (1 << 30))*scale) >> 15),
(int16_t) (((int32_t) dds_lookup(*phase_acc + phase)*scale) >> 15));
*phase_acc += phase_rate;
return amp;
}
@@ -334,8 +335,8 @@ SPAN_DECLARE(complexi32_t) dds_complexi32_mod(uint32_t *phase_acc, int32_t phase
{
complexi32_t amp;
amp = complex_seti32(((int32_t) dds_lookup(*phase_acc + phase + (1 << 30))*(int32_t) scale) >> 15,
((int32_t) dds_lookup(*phase_acc + phase)*(int32_t) scale) >> 15);
amp = complex_seti32(((int32_t) dds_lookup(*phase_acc + phase + (1 << 30))*scale) >> 15,
((int32_t) dds_lookup(*phase_acc + phase)*scale) >> 15);
*phase_acc += phase_rate;
return amp;
}