add dsp/ with FFT, filters, detector, stereo support

rttbl.py

@@ -0,0 +1,112 @@
+#!/usr/bin/env python3
+import subprocess, os, glob, sys, time, struct, math
+
+RPP = "/home/m/soothe-bt/render_short.rpp"
+OUT = "/home/m/soothe-bt/out_rt.wav"
+proc = subprocess.Popen(['reaper', '-nosplash', '-renderproject', RPP],
+                        stdout=open('/tmp/rttbl.log', 'w'), stderr=subprocess.STDOUT)
+print('reaper', proc.pid, flush=True)
+
+def find_hosts():
+    out = []
+    for p in glob.glob('/proc/[0-9]*'):
+        try:
+            pid = int(os.path.basename(p))
+            m = open(f'/proc/{pid}/maps').read()
+            c = open(f'/proc/{pid}/cmdline', 'rb').read().decode('utf8', 'replace')
+            if 'soothe2' in m and 'yabridge-host.exe' in c:
+                out.append(pid)
+        except Exception:
+            pass
+    return out
+
+def out_growth():
+    try:
+        return os.path.getsize(OUT)
+    except Exception:
+        return 0
+
+t0 = time.time()
+hosts = None
+base_sz = out_growth()
+while time.time() - t0 < 60:
+    hosts = find_hosts()
+    if hosts:
+        break
+    time.sleep(0.2)
+print('hosts:', hosts, flush=True)
+grew = 0
+while time.time() - t0 < 120:
+    s = out_growth()
+    if s > base_sz:
+        grew = s; break
+    if proc.poll() is not None:
+        print('reaper exited early', flush=True); break
+    time.sleep(0.3)
+print('out:', grew, flush=True)
+if not hosts or grew == 0:
+    proc.kill(); sys.exit('fail')
+time.sleep(0.5)
+
+step = 2 * math.pi / 2048
+def qsin(k):
+    # sin(k*step) search tolerance 1e-6 (we only need anchor match)
+    return math.sin(k * step)
+
+for pid in hosts:
+    mem = os.open(f'/proc/{pid}/mem', os.O_RDONLY)
+    tables = []
+    maps = open(f'/proc/{pid}/maps').read()
+    for line in maps.splitlines():
+        p = line.split()
+        lo, hi = (int(x, 16) for x in p[0].split('-'))
+        if 'r' not in p[1]:
+            continue
+        if lo < 0x180000000 or lo >= 0x183000000:
+            try:
+                d = os.pread(mem, hi - lo, lo)
+            except Exception:
+                continue
+            if len(d) < 16:
+                continue
+            q = len(d) // 8
+            qw = struct.unpack('<%dQ' % q, memoryview(d)[:q * 8])
+            for o in range(0, q - 4):
+                if qw[o] != 0:
+                    continue
+                # candidate anchor: qw[o]==0.0 and qw[o+1] approx sin(step), qw[o+2] approx sin(2step)
+                v1 = struct.unpack('<d', struct.pack('<Q', qw[o + 1]))[0]
+                v2 = struct.unpack('<d', struct.pack('<Q', qw[o + 2]))[0]
+                e1, e2 = qsin(1), qsin(2)
+                if abs(v1 - e1) < 1e-8 and abs(v2 - e2) < 1e-8:
+                    # count how many follow match sin(k*step) to confirm length
+                    cnt = 0
+                    for k in range(1, 900):
+                        v = struct.unpack('<d', struct.pack('<Q', qw[o + k]))[0]
+                        if abs(v - qsin(k % 1024)) < 1e-6 and k <= 300:
+                            cnt = k
+                        else:
+                            break
+                    tables.append((lo + o * 8, cnt))
+        # limit scanning to a sane budget
+    print('PID', pid, 'tables:', tables[:10], flush=True)
+    for t, cnt in tables[:3]:
+        off = t
+        vals = []
+        mem2 = os.open(f'/proc/{pid}/mem', os.O_RDONLY)
+        try:
+            d = os.pread(mem2, 1024 * 8, t)
+            vals = struct.unpack('<1024d', d)
+        except Exception as e:
+            print('read err', e, flush=True)
+        os.close(mem2)
+        with open('twiddle_2048_ref.f64', 'wb') as f:
+            for v in vals:
+                f.write(struct.pack('<d', v))
+        print('   ', hex(t), 'len~', cnt, 'first', ' '.join('%.9g' % v for v in vals[:5]),
+              'idx256', vals[256], flush=True)
+        print('   saved twiddle_2048_ref.f64', flush=True)
+        break
+    os.close(mem)
+proc.kill()
+print('done', flush=True)