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

rtwin.py

@@ -0,0 +1,118 @@
+#!/usr/bin/env python3
+import subprocess, os, glob, sys, time, struct
+
+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/rtwin.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)
+
+N_POW2 = {2048, 4096}
+UPS = {2,4,8,16}
+
+for pid in hosts:
+    mem = os.open(f'/proc/{pid}/mem', os.O_RDONLY)
+    found = []
+    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) < 0x1ac + 8:
+                continue
+            for o in range(0, len(d) - (0x1ac + 8), 8):
+                n0 = struct.unpack_from('<I', d, o + 0x19c)[0]
+                n1 = struct.unpack_from('<I', d, o + 0x1a0)[0]
+                u = struct.unpack_from('<I', d, o + 0x1ac)[0]
+                if n0 in N_POW2 and n1 == n0 and u in UPS:
+                    w = struct.unpack_from('<f', d, o + 0x1a4)[0]
+                    if 0.1 < w < 5.0:
+                        found.append((lo + o))
+    print('PID', pid, 'SP objects:', [hex(a) for a in found], flush=True)
+    # dump a generous window around each object; hunt for a sin-quarter table
+    for a in found:
+        try:
+            big = os.pread(mem, 0x400000, a)
+        except Exception:
+            continue
+        db = struct.unpack('<%dQ' % (len(big) // 8), big)
+        # sin table starts with 0.0 then sin(2*pi/N)... find 513 consecutive doubles matching
+        import math
+        N = 2048
+        step = 2 * math.pi / N
+        best = None
+        for o in range(0, len(db) - 520):
+            # candidate: db[o]==0 and db[o+1]~sin(step), monotonic up to pi/2
+            if db[o] != 0:
+                continue
+            # convert qwords to doubles for compare window
+            ok = True
+            for k in range(1, 8):
+                v0 = struct.unpack('<d', struct.pack('<Q', db[o + k]))[0]
+                e = math.sin(k * step)
+                if abs(v0 - e) > 1e-9 and k <= 4:
+                    ok = False
+                    break
+            if ok:
+                best = o
+                break
+        if best is not None:
+            tgt = a + best * 8
+            print('   table start ~', hex(tgt), 'collecting 1024 doubles', flush=True)
+            vals = [struct.unpack('<d', struct.pack('<Q', db[best + k]))[0] for k in range(1024)]
+            with open('twiddle_2048_ref.f64', 'wb') as f:
+                for v in vals:
+                    f.write(struct.pack('<d', v))
+            print('   first:', ' '.join('%.9g' % v for v in vals[:6]), flush=True)
+            print('   at 256 (pi/2):', vals[256], flush=True)
+            print('   saved twiddle_2048_ref.f64', flush=True)
+    os.close(mem)
+proc.kill()
+print('done', flush=True)