feat(audiod): DAC 实时监控 — 数字域电平表(100ms窗口整数RMS/peak,deci-dBFS)+1s监控日志(TF audio_monitor_<bootts>.log,流停即停)+CLI monitor 电平条;STATE 补 rms/peak/lvlseq 键(ABI兼容)。宿主47/47,qemu+真机0.7.91 tone验证(1kHz 0.3幅:rms=-13.9 peak=-10.8dBFS,hwrate~44.1k健康)。audiod ab193a2b meow_audio 891ab264

patch_v2/meow_audiod/test_audiod_host.c

@@ -479,6 +479,99 @@ int main(void)
     close(z7.fd);
     stop_audiod();
 
+    /* ---- T8：数字域电平表 + 全面监控日志（M2.97 DAC 实时监控）。
+     * 已知幅度正弦（amp=0.3, 440Hz）：理论 RMS=0.3/√2 → -13.5dBFS，peak=0.3 → -10.5dBFS。
+     * audiod 电平表为整数近似（octave 线性插值，误差 ~0.5dB）→ 容差 ±2.5dB。
+     * 监控日志：流活跃期主线程 1s 节拍写 /tmp/audio_monitor_<bootts>.log（宿主无卡降级）。 ---- */
+    printf("[T8 level meter + monitor log]\n");
+    unlink(TSOCK); unlink(TWAV);
+    g_audiod_pid = start_audiod();           /* file sink */
+    usleep(400000);
+    struct cli m8;
+    check(cli_connect(&m8) == 0, "connect M8");
+    m_audio_open_ack_t ackM8;
+    check(do_open(&m8, 44100, 2, AUDIO_FMT_S16, &ackM8) == 0 && ackM8.err == MEOW_OK, "open M8");
+    /* 喂 ~270ms 的 440Hz/0.3 幅度正弦（>2 个 100ms 窗口） */
+    for (int i = 0; i < 12; i++)
+        do_write(&m8, pcm, (uint32_t)gen_sine(pcm, sizeof pcm, AUDIO_FMT_S16, 1000, 440, 44100));
+    char q8[1024];
+    check(do_query(&m8, q8, sizeof q8) == 0 && strstr(q8, "rms=") && strstr(q8, "peak="),
+          "query exposes rms/peak keys");
+    int rms8 = -990, pk8 = -990;
+    for (int i = 0; i < 20; i++) {              /* 最多 2s 等首个窗口结算（播放排空竞态护栏） */
+        do_query(&m8, q8, sizeof q8);
+        rms8 = atoi(strstr(q8, "rms=") + 4);
+        pk8  = atoi(strstr(q8, "peak=") + 5);
+        if (rms8 > -990) break;
+        usleep(100000);
+    }
+    printf("  sine 0.3: rms=%d peak=%d (expect rms≈-135 peak≈-105 deci-dB)\n", rms8, pk8);
+    check(rms8 >= -160 && rms8 <= -110, "sine RMS ≈ -13.5dBFS (±2.5dB)");
+    check(pk8 >= -130 && pk8 <= -80, "sine peak ≈ -10.5dBFS (±2.5dB)");
+    /* 静音 → 地板（轮询等窗口结算：窗口按块粒度对齐，消除播放排空时序竞态） */
+    {
+        uint8_t zeros[4096];
+        memset(zeros, 0, sizeof zeros);
+        for (int i = 0; i < 8; i++) do_write(&m8, zeros, sizeof zeros);   /* ~186ms */
+        int floor_ok = 0;
+        for (int i = 0; i < 20; i++) {              /* 最多 2s 等纯零窗口结算 */
+            usleep(100000);
+            do_query(&m8, q8, sizeof q8);
+            rms8 = atoi(strstr(q8, "rms=") + 4);
+            pk8 = atoi(strstr(q8, "peak=") + 5);
+            if (rms8 <= -990 && pk8 <= -990) { floor_ok = 1; break; }
+        }
+        printf("  silence: rms=%d peak=%d\n", rms8, pk8);
+        check(floor_ok, "silence -> -inf floor");
+    }
+    /* monitor CLI 冒烟（流仍活跃：输出含电平字段+电平条） */
+    {
+        unlink("/tmp/meow_mon_cli.out");
+        pid_t mp = fork();
+        if (mp == 0) {
+            setenv("MEOW_AUDIO_SOCK", TSOCK, 1);
+            int fd = open("/tmp/meow_mon_cli.out", O_WRONLY | O_CREAT | O_TRUNC, 0644);
+            if (fd >= 0) { dup2(fd, 1); close(fd); }
+            execl("./meow_audio_host", "meow_audio_host", "monitor", "2", (char *)0);
+            _exit(127);
+        }
+        int mst = 0;
+        waitpid(mp, &mst, 0);
+        char mb[4096];
+        int ml = 0;
+        int fd = open("/tmp/meow_mon_cli.out", O_RDONLY);
+        if (fd >= 0) { ml = (int)read(fd, mb, sizeof mb - 1); close(fd); if (ml > 0) mb[ml] = 0; }
+        check(ml > 0 && strstr(mb, "rms=") && strstr(mb, "LIVE") && strchr(mb, '['),
+              "monitor CLI prints live level bar");
+    }
+    /* 监控日志文件：活跃期应已写入（前面耗时已超 2 个 1s 节拍） */
+    char bootts[64] = "";
+    {
+        int fd = open("/tmp/meow_bootts", O_RDONLY);
+        if (fd >= 0) { ssize_t r = read(fd, bootts, 63); close(fd); if (r > 0) bootts[r] = 0; }
+    }
+    char monpath[160];
+    snprintf(monpath, sizeof monpath, "/tmp/audio_monitor_%s.log", bootts);
+    char monbuf[4096];
+    int monlen = 0;
+    {
+        int fd = open(monpath, O_RDONLY);
+        if (fd >= 0) { monlen = (int)read(fd, monbuf, sizeof monbuf - 1); close(fd); if (monlen > 0) monbuf[monlen] = 0; }
+    }
+    check(monlen > 0 && strstr(monbuf, "app=test") && strstr(monbuf, "rms=") &&
+          strstr(monbuf, "hwrate=") && strstr(monbuf, "vol="),
+          "monitor log file written while stream active");
+    /* 流停止即停写 */
+    do_ctrl(&m8, MSG_AUDIO_STOP, ackM8.stream_id);
+    usleep(1400000);
+    off_t msz1 = -1, msz2 = -1;
+    { int fd = open(monpath, O_RDONLY); if (fd >= 0) { msz1 = lseek(fd, 0, SEEK_END); close(fd); } }
+    usleep(1400000);
+    { int fd = open(monpath, O_RDONLY); if (fd >= 0) { msz2 = lseek(fd, 0, SEEK_END); close(fd); } }
+    check(msz1 >= 0 && msz1 == msz2, "monitor log stops when stream stops");
+    close(m8.fd);
+    stop_audiod();
+
     printf("=== SUMMARY: pass=%d fail=%d ===\n", g_pass, g_fail);
     return g_fail ? 1 : 0;
 }