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ltpf: Move analysis to fixed point

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This commit is contained in:
Antoine SOULIER
2022-05-04 14:45:20 +02:00
parent e0efd79390
commit e471e43aeb
22 changed files with 1902 additions and 345 deletions
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42
test/ltpf.py
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@@ -120,7 +120,7 @@ class Resampler_6k4:
def initial_hp50_state():
return { 's1': 0.0, 's2': 0.0 }
return { 's1': 0, 's2': 0 }
### ------------------------------------------------------------------------ ###
@@ -442,25 +442,25 @@ def initial_sstate():
def check_resampler(rng, dt, sr):
ns = T.NS[dt][sr]
nd = T.ND[dt][sr]
nt = (5 * T.SRATE_KHZ[sr]) // 4
ok = True
r = Resampler_12k8(dt, sr)
hp50_c = initial_hp50_state()
x_c = np.zeros(nd)
x_c = np.zeros(nt)
y_c = np.zeros(384)
for run in range(10):
x = (2 * rng.random(ns)) - 1
x = ((2 * rng.random(ns)) - 1) * (2 ** 15 - 1)
y = r.resample(x)
x_c = np.append(x_c[-nd:], x)
x_c = np.append(x_c[-nt:], x.astype(np.int16))
y_c[:-r.n] = y_c[r.n:]
y_c = lc3.ltpf_resample(dt, sr, hp50_c, x_c, y_c)
ok = ok and np.amax(np.abs(y_c[-r.d-r.n:] - y[:r.d+r.n])) < 1e-4
ok = ok and np.amax(np.abs(y_c[-r.d-r.n:] - y[:r.d+r.n]/2)) < 4
return ok
@@ -469,54 +469,54 @@ def check_resampler_appendix_c(dt):
sr = T.SRATE_16K
ok = True
nd = T.ND[dt][sr]
nt = (5 * T.SRATE_KHZ[sr]) // 4
n = [ 96, 128 ][dt]
k = [ 44, 24 ][dt] + n
state = initial_hp50_state()
x = np.append(np.zeros(nd), C.X_PCM[dt][0])
x = np.append(np.zeros(nt), C.X_PCM[dt][0])
y = np.zeros(384)
y = lc3.ltpf_resample(dt, sr, state, x, y)
u = y[-k:len(C.X_TILDE_12K8D[dt][0])-k]
ok = np.amax(np.abs(u - C.X_TILDE_12K8D[dt][0])) < 1e0
ok = ok and np.amax(np.abs(u - C.X_TILDE_12K8D[dt][0]/2)) < 2
x = np.append(x[-nd:], C.X_PCM[dt][1])
x = np.append(x[-nt:], C.X_PCM[dt][1])
y[:-n] = y[n:]
y = lc3.ltpf_resample(dt, sr, state, x, y)
u = y[-k:len(C.X_TILDE_12K8D[dt][1])-k]
ok = ok and np.amax(np.abs(u - C.X_TILDE_12K8D[dt][1])) < 1e0
ok = ok and np.amax(np.abs(u - C.X_TILDE_12K8D[dt][1]/2)) < 2
return ok
def check_analysis(rng, dt, sr):
ns = T.NS[dt][sr]
nd = T.ND[dt][sr]
nt = (5 * T.SRATE_KHZ[sr]) // 4
ok = True
state_c = initial_state()
x_c = np.zeros(ns+nd)
x_c = np.zeros(ns+nt)
ltpf = LtpfAnalysis(dt, sr)
t = np.arange(100 * ns) / (T.SRATE_KHZ[sr] * 1000)
s = signal.chirp(t, f0=50, f1=3e3, t1=t[-1], method='logarithmic')
s = signal.chirp(t, f0=10, f1=3e3, t1=t[-1], method='logarithmic')
for i in range(20):
x = s[i*ns:(i+1)*ns]
x = s[i*ns:(i+1)*ns] * (2 ** 15 - 1)
pitch_present = ltpf.run(x)
data = ltpf.get_data()
x_c = np.append(x_c[-nd:], x)
x_c = np.append(x_c[-nt:], x.astype(np.int16))
(pitch_present_c, data_c) = lc3.ltpf_analyse(dt, sr, state_c, x_c)
ok = ok and state_c['tc'] == ltpf.tc
ok = ok and np.amax(np.abs(state_c['nc'][0] - ltpf.nc[0])) < 1e-4
ok = ok and (not pitch_present or state_c['tc'] == ltpf.tc)
ok = ok and np.amax(np.abs(state_c['nc'][0] - ltpf.nc[0])) < 1e-2
ok = ok and pitch_present_c == pitch_present
ok = ok and data_c['active'] == data['active']
ok = ok and data_c['pitch_index'] == data['pitch_index']
@@ -564,12 +564,12 @@ def check_synthesis(rng, dt, sr):
def check_analysis_appendix_c(dt):
sr = T.SRATE_16K
nd = T.ND[dt][sr]
nt = (5 * T.SRATE_KHZ[sr]) // 4
ok = True
state = initial_state()
x = np.append(np.zeros(nd), C.X_PCM[dt][0])
x = np.append(np.zeros(nt), C.X_PCM[dt][0])
(pitch_present, data) = lc3.ltpf_analyse(dt, sr, state, x)
ok = ok and C.T_CURR[dt][0] - state['tc'] == 17
@@ -578,7 +578,7 @@ def check_analysis_appendix_c(dt):
ok = ok and data['pitch_index'] == C.PITCH_INDEX[dt][0]
ok = ok and data['active'] == C.LTPF_ACTIVE[dt][0]
x = np.append(x[-nd:], C.X_PCM[dt][1])
x = np.append(x[-nt:], C.X_PCM[dt][1])
(pitch_present, data) = lc3.ltpf_analyse(dt, sr, state, x)
ok = ok and C.T_CURR[dt][1] - state['tc'] == 17