MeowOS-For-R3P2/patch_v2/ncm_app/bench/vol_sync_sim.c

/* bench/vol_sync_sim.c — 任务1：开播前「系统当前音量 → audiod」下发宿主验证。
 *
 * 场景（0 真实请求/0 真实 audiod）：fake audiod socket（AF_UNIX SOCK_STREAM）+ 临时 settings.conf
 * （audio.volume = <V>，读改写单键同源同键）。调 audio_out_sync_volume()，断言 fake audiod 收到
 * 一条 MSG_AUDIO_VOLUME 帧，且 pct == settings 的 audio.volume。这验证「打开音频会话时把系统
 * 音量同步下发到 audiod」的根因修复（未播放时 DAC 停在默认/残留音量 → 动音量键才追设定值）。
 *
 * 另验证：音量语义只传 pct(0-100)——反转/真静音(255) 由 audiod dac_vol_set 负责，本层不碰。
 *
 * 编译（宿主，ncm_app 目录下）：
 *   gcc -O1 -DJSMN_HEADER -I. -Icore -I../sdk -I../meow_launcherd \
 *       -c bench/vol_sync_sim.c -o /tmp/vs.o
 *   gcc -O1 -DJSMN_HEADER -I. -Icore -I../sdk -I../meow_launcherd \
 *       -c app/play/audio_out.c -o /tmp/vs_ao.o
 *   gcc -O1 -o vol_sync_sim /tmp/vs.o /tmp/vs_ao.o -lpthread
 * 运行：./vol_sync_sim   （0 网络；PASS/FAIL 退出码）
 */
#include "../app/ncm_app_internal.h"
#include "meow_ipc.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/un.h>

ncm_app_state_t g_st;
ncm_play_run_t  g_play;
volatile int    g_app_quit = 0;
volatile int    g_net_ready = 1;
int             g_host_mock = 0;
size_t ncm_strlcpy(char *dst, const char *src, size_t sz)
{
    size_t n = 0;
    if (sz) { while (src[n] && n < sz - 1) { dst[n] = src[n]; n++; } dst[n] = 0; }
    while (src[n]) n++;
    return n;
}
void meow_log(meow_log_level lvl, const char *fmt, ...) { (void)lvl; (void)fmt; }

/* audio_out.c 引用但本 sim 不经 SDK 调用的符号：只链不跑就满足链接 */
int      meow_audio_open(int rate, int ch, int fmt) { (void)rate;(void)ch;(void)fmt; return -1; }
int      meow_audio_write(const void *pcm, int frames) { (void)pcm; return frames; }
int      meow_audio_pause(int sid, int paused) { (void)sid;(void)paused; return 0; }
int      meow_audio_close(int sid) { (void)sid; return 0; }
int      meow_audio_query(meow_audio_state *out) { (void)out; return -1; }

/* ---- fake audiod ---- */
static const char *g_sock = "/tmp/vol_sync_audiod.sock";
static uint16_t g_got_type = 0;
static int32_t  g_got_pct = -1;
static int      g_got = 0;
static volatile int g_nconn = 0;     /* 收到多少条连接 */
static volatile int g_nframe = 0;    /* 收到多少条 VOLUME 帧 */
static volatile int g_stop = 0;

/* fake audiod：接受多条连接（上限 32，超过即停——失败才触发，正常不该超），每条只读一帧
 * VOLUME 然后等对端 EOF（ncm 侧 close）。统计连接数与帧数，供「重复 sync 不新建连接」断言。 */
static void *server(void *arg)
{
    (void)arg;
    unlink(g_sock);
    int lfd = socket(AF_UNIX, SOCK_STREAM, 0);
    if (lfd < 0) return NULL;
    struct sockaddr_un a;
    memset(&a, 0, sizeof a);
    a.sun_family = AF_UNIX;
    strncpy(a.sun_path, g_sock, sizeof a.sun_path - 1);
    if (bind(lfd, (struct sockaddr *)&a, sizeof a) != 0) { close(lfd); return NULL; }
    listen(lfd, 16);
    int lfl = fcntl(lfd, F_GETFL, 0);
    if (lfl >= 0) fcntl(lfd, F_SETFL, lfl | O_NONBLOCK);   /* 非阻塞：g_stop 能及时退出 */
    while (!g_stop && g_nconn < 32) {
        int fd = accept(lfd, NULL, NULL);
        if (fd < 0) { usleep(20000); continue; }   /* EAGAIN：无连接，短睡重试 */
        g_nconn++;
        /* 读满一帧（20B）或 EOF：stream socket read 可分段返回，须循环凑满再判。 */
        uint8_t frame[MEOW_IPC_HDR_LEN + sizeof(int32_t)];
        ssize_t n = 0;
        while (n < (ssize_t)sizeof frame) {
            ssize_t r = read(fd, frame + n, sizeof frame - (size_t)n);
            if (r <= 0) break;                    /* EOF / 错 */
            n += r;
        }
        if (n >= (ssize_t)(MEOW_IPC_HDR_LEN + sizeof(int32_t))) {
            uint32_t magic, len;
            uint16_t ver, type;
            memcpy(&magic, frame, 4); memcpy(&ver, frame + 4, 2); memcpy(&type, frame + 6, 2);
            memcpy(&len, frame + 12, 4);
            if (magic == MEOW_IPC_MAGIC && ver == MEOW_IPC_VERSION && type == MSG_AUDIO_VOLUME) {
                g_got_type = type;
                memcpy(&g_got_pct, frame + 16, sizeof g_got_pct);
                g_got = 1;
                g_nframe++;
            }
        }
        close(fd);
    }
    close(lfd);
    return NULL;
}

int main(void)
{
    int fail = 0;
    /* 临时 settings.conf：audio.volume = 24（读改写单键同源键），另带 max 干扰键 */
    const char *cfg = "/tmp/vol_sync_settings.conf";
    FILE *f = fopen(cfg, "w");
    if (!f) { printf("FAIL  cannot write settings\n"); return 1; }
    fprintf(f, "# meow-settings 1\naudio.volume = 24\naudio.volume_max = 50\ndisplay.brightness = 80\n");
    fclose(f);
    setenv("MEOW_SETTINGS_FILE", cfg, 1);
    setenv("MEOW_AUDIO_SOCK", g_sock, 1);

    pthread_t th;
    if (pthread_create(&th, NULL, server, NULL) != 0) { printf("FAIL  server thread\n"); return 1; }
    usleep(50000);          /* 等 fake audiod listen */

    /* 第一次 sync（首次 open）：应下发一帧 VOLUME，pct==settings */
    audio_out_sync_volume();
    usleep(50000);          /* 等服务线程 accept+读帧（主/服务线程异步） */
    if (!g_got) { printf("FAIL  fake audiod received no frame\n"); fail = 1; }
    else if (g_got_type != MSG_AUDIO_VOLUME) {
        printf("FAIL  expected MSG_AUDIO_VOLUME (0x%04x) got 0x%04x\n", MSG_AUDIO_VOLUME, g_got_type);
        fail = 1;
    } else if (g_got_pct != 24) {
        printf("FAIL  expected pct=24 (settings audio.volume) got %d\n", (int)g_got_pct);
        fail = 1;
    } else {
        printf("PASS  audiod sync volume: type=0x%04x pct=%d == settings.audio.volume\n",
               g_got_type, (int)g_got_pct);
    }

    /* 连接风暴回归（§2026-09-02 fd=N accept 根因）：音量未变时反复 sync 不得新建连接。
     * 模拟边下边播/切歌期频繁 audio_out_open → audio_out_sync_volume（同值，不重发）。 */
    for (int i = 0; i < 50; i++) audio_out_sync_volume();   /* 同值 50 次：应零新增连接 */
    usleep(50000);
    if (g_nconn != 1) {
        printf("FAIL  unchanged-volume re-sync created %d connections (expect 1)\n", (int)g_nconn);
        fail = 1;
    } else {
        printf("PASS  unchanged-volume re-sync: 50 calls -> 1 connection (storm eliminated)\n");
    }

    /* 值变才重发：settings 改成 50 → 下一次 sync 应新建第 2 条连接 */
    FILE *g = fopen(cfg, "w");
    if (!g) { printf("FAIL  cannot rewrite settings\n"); fail = 1; }
    else {
        fprintf(g, "# meow-settings 1\naudio.volume = 50\naudio.volume_max = 50\ndisplay.brightness = 80\n");
        fclose(g);
    }
    audio_out_sync_volume();
    usleep(50000);
    if (g_nconn != 2 || g_got_pct != 50) {
        printf("FAIL  changed-volume re-sync: conns=%d (expect 2) last_pct=%d (expect 50)\n",
               (int)g_nconn, (int)g_got_pct);
        fail = 1;
    } else {
        printf("PASS  changed-volume re-sync: settings=50 -> 2nd connection pct=50\n");
    }

    g_stop = 1;
    pthread_join(th, NULL);
    unlink(g_sock);
    unlink(cfg);
    if (fail) { printf("vol_sync_sim FAIL\n"); return 1; }
    printf("vol_sync_sim PASS\n");
    return 0;
}