541 lines
22 KiB
C
541 lines
22 KiB
C
/* meow_ui_audio.c — App 侧独占音频客户端（SDK 公共件；见 meow_ui.h §11）。
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*
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* 定位：App 只经本 API 喂 PCM 给 meow_audiod（独占 hw:0,0 守护）。audiod 不在一律失败
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* （open 返回 MEOW_ERR_NOENT 等负错误码），不做隐式直开回退；调试可 env MEOW_AUDIO_DIRECT=1 走自带
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* 直接 ALSA 直开（非正式能力）。
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*
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* 传输：AF_UNIX SOCK_STREAM 到 audiod socket（缺省 /usr/data/meow_audio.sock；env
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* MEOW_AUDIO_SOCK 覆盖，宿主/qemu）。帧格式复用 meow_ipc.h 16B 头 + m_audio_* 负载（同一份）。
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*
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* 线程模型（懒连 + 内部读线程）：
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* - 首次 open/query 时 connect → 懒启动读线程（poll 读 audiod 下发帧）。
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* - 读线程为唯一读方：PREEMPTED → 调 on_preempt 回调 + 标写死；OPEN_ACK/STATE/ACK（匹配
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* 当前挂起请求）→ 拷贝到 g_resp、唤醒调用方（条件变量）。
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* - 写路径（write/pause/resume/close）由 App 线程在另一方向写同一 fd（全双工，互不干扰）。
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*
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* 格式归一：open 返回前记录 grant_rate/grant_ch/grant_fmt；meow_audio_write 把 native（open 参数）
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* 样本逐帧转成 grant 格式（mono→stereo 复制 / S16↔S32 定值升降位），分批 ≤4096B 发 MSG_AUDIO_WRITE。
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* 无 SRC：grant_rate == native rate（audiod 把 DAC 原生率设为流率）。
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*/
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#include "meow_ui.h"
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#include "meow_ipc.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <poll.h>
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#include <pthread.h>
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#include <time.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#ifdef __linux__
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#include <sound/asound.h>
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#include <sys/ioctl.h>
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#define UI_AUDIO_HAVE_ALSA 1
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#endif
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#define AUD_SOCK_DEFAULT "/usr/data/meow_audio.sock"
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static pthread_mutex_t g_mu = PTHREAD_MUTEX_INITIALIZER;
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static pthread_cond_t g_cond = PTHREAD_COND_INITIALIZER;
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static int g_fd = -1;
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static pthread_t g_thr;
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static int g_thr_on = 0;
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static volatile int g_quit = 0;
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/* 当前流状态 */
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static int g_has_stream = 0;
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static uint32_t g_sid = 0;
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static int g_dead = 0; /* 收到 PREEMPTED 后置 1：write 返回负值 */
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static int g_own_rate = 0, g_own_ch = 0, g_own_fmt = 0; /* native（open 参数） */
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static int g_grant_rate = 0, g_grant_ch = 0, g_grant_fmt = 0;
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static meow_audio_preempt_fn g_preempt_cb = NULL;
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static void *g_preempt_ctx = NULL;
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/* 挂起请求（读线程分发；一次只有一个） */
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static uint32_t g_pending = 0; /* req_id，0=无挂起 */
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static uint16_t g_resp_type = 0;
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static uint8_t g_resp[MEOW_IPC_MAX];
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static uint32_t g_resp_len = 0;
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/* 调试直开（env MEOW_AUDIO_DIRECT=1） */
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static int g_direct = 0;
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static int g_dir_fd = -1;
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static const char *sock_path(void)
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{
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const char *e = getenv("MEOW_AUDIO_SOCK");
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return (e && e[0]) ? e : AUD_SOCK_DEFAULT;
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}
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/* 连接 audiod。**全部有界**：connect 非阻塞 + poll 2s（对端 listen backlog 满/wedge 时
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* 阻塞 connect 会把 App 播放线程永久压进内核——真机长流卡死的同款路径）；
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* 建连后 SO_SNDTIMEO/RCVTIMEO 2s：audiod 停摆时 write 超时返回错误 → 标记流死，
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* App 走「重新 open」恢复路径，绝不永久阻塞。 */
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#define AUD_CONN_TMO_MS 2000
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static int connect_path(const char *path)
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{
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int fd = socket(AF_UNIX, SOCK_STREAM, 0);
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if (fd < 0) return -1;
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int fl = fcntl(fd, F_GETFL, 0);
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if (fl >= 0) fcntl(fd, F_SETFL, fl | O_NONBLOCK);
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struct sockaddr_un a;
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memset(&a, 0, sizeof a);
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a.sun_family = AF_UNIX;
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strncpy(a.sun_path, path, sizeof a.sun_path - 1);
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int r = connect(fd, (struct sockaddr *)&a, sizeof a);
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if (r < 0 && errno == EINPROGRESS) {
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struct pollfd p;
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p.fd = fd; p.events = POLLOUT; p.revents = 0;
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if (poll(&p, 1, AUD_CONN_TMO_MS) > 0) {
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int err = 0;
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socklen_t el = sizeof err;
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if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &el) == 0 && err != 0) { errno = err; r = -1; }
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} else {
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r = -1; /* 超时/错误 */
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}
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}
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if (r < 0) { close(fd); return -1; }
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if (fl >= 0) fcntl(fd, F_SETFL, fl); /* 回阻塞模式；读写超时由 SO_*TIMEO 兜底 */
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struct timeval tv;
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tv.tv_sec = AUD_CONN_TMO_MS / 1000; tv.tv_usec = 0;
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setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof tv);
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setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof tv);
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return fd;
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}
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static int write_all(int fd, const uint8_t *p, size_t n)
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{
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size_t off = 0;
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while (off < n) {
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ssize_t w = write(fd, p + off, n - off);
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if (w < 0) { if (errno == EINTR) continue; return -1; }
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if (w == 0) return -1;
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off += (size_t)w;
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}
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return 0;
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}
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static int read_all(int fd, uint8_t *p, size_t n)
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{
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size_t off = 0;
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while (off < n) {
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ssize_t r = read(fd, p + off, n - off);
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if (r < 0) { if (errno == EINTR) continue; return -1; }
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if (r == 0) return -1;
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off += (size_t)r;
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}
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return 0;
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}
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static int send_frame(int fd, uint16_t type, uint32_t req_id, const void *payload, uint32_t len)
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{
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uint8_t hdr[MEOW_IPC_HDR_LEN];
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uint32_t magic = MEOW_IPC_MAGIC;
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uint16_t ver = MEOW_IPC_VERSION;
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memcpy(hdr + 0, &magic, 4);
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memcpy(hdr + 4, &ver, 2);
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memcpy(hdr + 6, &type, 2);
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memcpy(hdr + 8, &req_id, 4);
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memcpy(hdr + 12, &len, 4);
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if (write_all(fd, hdr, sizeof hdr) != 0) return -1;
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if (len && payload && write_all(fd, payload, len) != 0) return -1;
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return 0;
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}
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static int read_frame(int fd, uint16_t *type, uint8_t *rbuf, uint32_t rcap)
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{
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uint8_t hdr[MEOW_IPC_HDR_LEN];
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if (read_all(fd, hdr, sizeof hdr) != 0) return -1;
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uint32_t magic, len; uint16_t ver;
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memcpy(&magic, hdr, 4); memcpy(&ver, hdr + 4, 2); memcpy(type, hdr + 6, 2);
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memcpy(&len, hdr + 12, 4);
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if (magic != MEOW_IPC_MAGIC || ver != MEOW_IPC_VERSION) return -1;
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if (len > rcap) len = rcap;
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if (len > 0 && read_all(fd, rbuf, len) != 0) return -1;
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return (int)len;
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}
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static void *audio_thread_main(void *arg);
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/* （调用方已持 mu）标记断线并关闭。 */
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static void mark_dead_locked(void)
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{
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if (g_fd >= 0) { close(g_fd); g_fd = -1; }
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g_dead = 1;
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}
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/* （调用方已持 mu）懒连接 + 懒起读线程。成功 0；audiod 不在 -1。 */
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static int conn_locked(void)
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{
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if (g_fd >= 0) return g_fd;
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if (g_direct) return -2; /* 调试直开：不连 socket */
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const char *sp = sock_path();
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int fd = connect_path(sp);
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if (fd < 0) return -1;
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int one = 1;
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setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof one);
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g_fd = fd;
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if (!g_thr_on) { g_quit = 0; g_thr_on = 1; pthread_create(&g_thr, NULL, audio_thread_main, NULL); pthread_detach(g_thr); }
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return fd;
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}
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/* ---- 调试直开（MEOW_AUDIO_DIRECT=1，仅开发） ---- */
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#ifdef UI_AUDIO_HAVE_ALSA
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static void pmask(struct snd_mask *m, unsigned bit) { m->bits[bit / 32] |= 1u << (bit % 32); }
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static void pivset(struct snd_interval *iv, unsigned val)
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{
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iv->min = iv->max = val; iv->integer = 1; iv->openmin = iv->openmax = 0; iv->empty = 0;
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}
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static int direct_alsa_open(int rate)
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{
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int fd = open("/dev/snd/pcmC0D0p", O_RDWR);
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if (fd < 0) return -1;
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struct snd_pcm_hw_params p;
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/* 「全放行」初始化（snd_pcm_hw_params_any 语义）：memset 0 的 interval 会被内核当成
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* 「只能取 0」约束 → refine 必空 → HW_PARAMS 恒 EINVAL（audiod 同款坑，勿回退）。 */
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memset(&p, 0, sizeof p);
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unsigned nm = SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1;
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for (unsigned i = 0; i < nm; i++)
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for (unsigned b = 0; b < sizeof p.masks[i].bits / sizeof p.masks[i].bits[0]; b++)
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p.masks[i].bits[b] = ~0u;
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unsigned ni = SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1;
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for (unsigned i = 0; i < ni; i++) { p.intervals[i].min = 0; p.intervals[i].max = ~0u; }
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p.flags = 0;
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/* mask 先清零再单点（pmask 只 OR）：全 1 的 access 会被内核 choose 成 MMAP_INTERLEAVED
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* → write() EINVAL（audiod 同款第二坑，勿回退）。 */
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struct snd_mask *am = &p.masks[SNDRV_PCM_HW_PARAM_ACCESS - SNDRV_PCM_HW_PARAM_FIRST_MASK];
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memset(am, 0, sizeof *am); pmask(am, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
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struct snd_mask *fm = &p.masks[SNDRV_PCM_HW_PARAM_FORMAT - SNDRV_PCM_HW_PARAM_FIRST_MASK];
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memset(fm, 0, sizeof *fm); pmask(fm, SNDRV_PCM_FORMAT_S16_LE);
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struct snd_mask *sm = &p.masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - SNDRV_PCM_HW_PARAM_FIRST_MASK];
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memset(sm, 0, sizeof *sm); pmask(sm, SNDRV_PCM_SUBFORMAT_STD);
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pivset(&p.intervals[SNDRV_PCM_HW_PARAM_CHANNELS - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL], 2);
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pivset(&p.intervals[SNDRV_PCM_HW_PARAM_RATE - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL], (unsigned)rate);
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p.rmask = ~0u; p.info = 0; p.msbits = 0; p.rate_num = 0; p.rate_den = 0;
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if (ioctl(fd, SNDRV_PCM_IOCTL_HW_PARAMS, &p) != 0) { close(fd); return -1; }
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ioctl(fd, SNDRV_PCM_IOCTL_PREPARE, 0);
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return fd;
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}
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#endif
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/* ---- 格式转换 ---- */
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static int fmt_bps(int fmt)
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{
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switch (fmt) {
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case AUDIO_FMT_S16: return 2;
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case AUDIO_FMT_S24:
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case AUDIO_FMT_S32:
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case AUDIO_FMT_FLOAT: return 4;
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default: return 2;
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}
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}
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static int32_t sample_from_native(const uint8_t *p, int fmt)
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{
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if (fmt == AUDIO_FMT_S16) { int16_t v; memcpy(&v, p, 2); return v; }
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int32_t v; memcpy(&v, p, 4); return v; /* S32/S24(32-in-32)/FLOAT 按 32 位采样 */
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}
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static void sample_to_grant(uint8_t *p, int fmt, int32_t v)
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{
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if (fmt == AUDIO_FMT_S16) { int16_t x = (int16_t)v; memcpy(p, &x, 2); return; }
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memcpy(p, &v, 4);
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}
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static int32_t convert_sample(int32_t v, int nfmt, int gfmt)
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{
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int nb = (nfmt == AUDIO_FMT_S16) ? 16 : 32;
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int gb = (gfmt == AUDIO_FMT_S16) ? 16 : 32;
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if (gb > nb) return v << (gb - nb);
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if (gb < nb) return v >> (nb - gb);
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return v;
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}
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/* 发一批 WRITE（≤MEOW_IPC_MAX，帧对齐；调用方已持 mu） */
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static int send_write_chunk(const uint8_t *p, uint32_t len)
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{
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if (g_fd < 0) { g_dead = 1; return -1; }
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if (send_frame(g_fd, MSG_AUDIO_WRITE, 0, p, len) != 0) { mark_dead_locked(); return -1; }
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return 0;
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}
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/* ---- 公开 API ---- */
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int meow_audio_open(int rate, int ch, int fmt)
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{
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/* env 检查：调试直开 */
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const char *de = getenv("MEOW_AUDIO_DIRECT");
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g_direct = (de && de[0] == '1') ? 1 : 0;
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pthread_mutex_lock(&g_mu);
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if (g_has_stream) { pthread_mutex_unlock(&g_mu); return MEOW_ERR_BUSY; }
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if (ch > 2 || ch < 1 || rate <= 0 || fmt < AUDIO_FMT_S16 || fmt > AUDIO_FMT_FLOAT || fmt == AUDIO_FMT_FLOAT) {
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pthread_mutex_unlock(&g_mu);
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return MEOW_ERR_INVAL;
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}
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g_own_rate = rate; g_own_ch = ch; g_own_fmt = fmt;
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if (g_direct) {
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#ifdef UI_AUDIO_HAVE_ALSA
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int fd = direct_alsa_open(rate);
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if (fd < 0) { pthread_mutex_unlock(&g_mu); return MEOW_ERR_NODEV; }
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g_dir_fd = fd;
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g_grant_rate = rate; g_grant_ch = 2; g_grant_fmt = AUDIO_FMT_S16;
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g_sid = 1; g_has_stream = 1; g_dead = 0;
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pthread_mutex_unlock(&g_mu);
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return 1;
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#else
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pthread_mutex_unlock(&g_mu);
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return MEOW_ERR_NODEV;
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#endif
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}
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int fd = conn_locked();
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if (fd < 0) { pthread_mutex_unlock(&g_mu); return MEOW_ERR_NOENT; } /* audiod 不在 */
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m_audio_open_t o;
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memset(&o, 0, sizeof o);
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snprintf(o.app_id, sizeof o.app_id, "%s", getenv("MEOW_LOG_APP") ? getenv("MEOW_LOG_APP") : "app");
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o.rate = (uint32_t)rate; o.ch = (uint16_t)ch; o.fmt = (uint16_t)fmt;
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uint32_t req = (g_pending == 0xFFFFFFFF) ? 1 : (g_pending + 1); /* 单调递增（单个挂起） */
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g_pending = req;
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g_resp_len = 0;
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if (send_frame(g_fd, MSG_AUDIO_OPEN, req, &o, sizeof o) != 0) { mark_dead_locked(); pthread_mutex_unlock(&g_mu); return MEOW_ERR_IO; }
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/* 等响应（3s 超时） */
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struct timespec ts; clock_gettime(CLOCK_REALTIME, &ts); ts.tv_sec += 3;
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while (g_pending == req) {
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int r = pthread_cond_timedwait(&g_cond, &g_mu, &ts);
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if (r != 0) { mark_dead_locked(); pthread_mutex_unlock(&g_mu); return MEOW_ERR_TIMEOUT; }
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}
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if (g_resp_type != MSG_AUDIO_OPEN_ACK || g_resp_len < sizeof(m_audio_open_ack_t)) {
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pthread_mutex_unlock(&g_mu);
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return MEOW_ERR_IO;
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}
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m_audio_open_ack_t a;
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memcpy(&a, g_resp, sizeof a);
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if (a.err != MEOW_OK) { pthread_mutex_unlock(&g_mu); return (int)a.err; }
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g_sid = a.stream_id;
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g_grant_rate = (int)a.grant_rate; g_grant_ch = (int)a.grant_ch; g_grant_fmt = (int)a.grant_fmt;
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g_has_stream = 1; g_dead = 0;
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pthread_mutex_unlock(&g_mu);
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return (int)g_sid;
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}
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int meow_audio_write(const void *pcm, int frames)
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{
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if (!pcm || frames <= 0) return 0;
|
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pthread_mutex_lock(&g_mu);
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if (g_direct) {
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size_t nb = (size_t)frames * (size_t)g_grant_ch * (size_t)fmt_bps(g_grant_fmt);
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const uint8_t *p = (const uint8_t *)pcm;
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size_t off = 0;
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while (off < nb) {
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ssize_t w = write(g_dir_fd, p + off, nb - off);
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if (w < 0) { if (errno == EINTR) continue; pthread_mutex_unlock(&g_mu); return -1; }
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off += (size_t)w;
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}
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pthread_mutex_unlock(&g_mu);
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return frames;
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}
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if (!g_has_stream || g_dead || g_fd < 0) { pthread_mutex_unlock(&g_mu); return -1; }
|
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/* 归一：native → grant */
|
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int ownfs = g_own_ch * fmt_bps(g_own_fmt);
|
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int gfs = g_grant_ch * fmt_bps(g_grant_fmt);
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static uint8_t out[MEOW_IPC_MAX];
|
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size_t ofs = 0;
|
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int done_frames = 0;
|
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const uint8_t *np = (const uint8_t *)pcm;
|
||
for (int i = 0; i < frames; i++) {
|
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/* 取 native 帧样本 */
|
||
int32_t s[2];
|
||
for (int c = 0; c < g_own_ch && c < 2; c++)
|
||
s[c] = sample_from_native(np + (size_t)i * ownfs + (size_t)c * fmt_bps(g_own_fmt), g_own_fmt);
|
||
/* 整帧才能进 payload（每帧不得跨两个 WRITE 分片） */
|
||
if (ofs + (size_t)gfs > sizeof out) {
|
||
if (send_write_chunk(out, (uint32_t)ofs) != 0) { pthread_mutex_unlock(&g_mu); return -1; }
|
||
ofs = 0;
|
||
}
|
||
/* 生成 grant 帧：own_ch==1 → 复制；own_ch==2 → 直通 */
|
||
for (int c = 0; c < g_grant_ch && c < 2; c++) {
|
||
int32_t v = (g_own_ch == 1) ? s[0] : s[c];
|
||
v = convert_sample(v, g_own_fmt, g_grant_fmt);
|
||
sample_to_grant(out + ofs, g_grant_fmt, v);
|
||
ofs += (size_t)fmt_bps(g_grant_fmt);
|
||
}
|
||
done_frames++;
|
||
}
|
||
if (ofs && send_write_chunk(out, (uint32_t)ofs) != 0) { pthread_mutex_unlock(&g_mu); return -1; }
|
||
pthread_mutex_unlock(&g_mu);
|
||
return done_frames;
|
||
}
|
||
|
||
int meow_audio_pause(int sid, int paused)
|
||
{
|
||
pthread_mutex_lock(&g_mu);
|
||
if (g_direct) { pthread_mutex_unlock(&g_mu); return 0; }
|
||
if (!g_has_stream || g_sid != (uint32_t)sid) { pthread_mutex_unlock(&g_mu); return MEOW_ERR_NOENT; }
|
||
m_audio_stream_t s; s.stream_id = (uint32_t)sid;
|
||
uint32_t req = g_pending + 1; g_pending = req;
|
||
if (send_frame(g_fd, paused ? MSG_AUDIO_PAUSE : MSG_AUDIO_RESUME, req, &s, sizeof s) != 0) {
|
||
mark_dead_locked(); pthread_mutex_unlock(&g_mu); return MEOW_ERR_IO;
|
||
}
|
||
struct timespec ts; clock_gettime(CLOCK_REALTIME, &ts); ts.tv_sec += 3;
|
||
while (g_pending == req) { if (pthread_cond_timedwait(&g_cond, &g_mu, &ts) != 0) { pthread_mutex_unlock(&g_mu); return MEOW_ERR_TIMEOUT; } }
|
||
pthread_mutex_unlock(&g_mu);
|
||
return 0;
|
||
}
|
||
|
||
int meow_audio_close(int sid)
|
||
{
|
||
pthread_mutex_lock(&g_mu);
|
||
if (g_direct) { g_has_stream = 0; if (g_dir_fd >= 0) close(g_dir_fd); g_dir_fd = -1; pthread_mutex_unlock(&g_mu); return 0; }
|
||
if (g_has_stream && g_sid == (uint32_t)sid) {
|
||
m_audio_stream_t s; s.stream_id = (uint32_t)sid;
|
||
uint32_t req = g_pending + 1; g_pending = req;
|
||
if (send_frame(g_fd, MSG_AUDIO_STOP, req, &s, sizeof s) == 0) {
|
||
struct timespec ts; clock_gettime(CLOCK_REALTIME, &ts); ts.tv_sec += 3;
|
||
while (g_pending == req) { if (pthread_cond_timedwait(&g_cond, &g_mu, &ts) != 0) break; }
|
||
}
|
||
g_has_stream = 0;
|
||
g_sid = 0;
|
||
g_dead = 0;
|
||
}
|
||
pthread_mutex_unlock(&g_mu);
|
||
return 0;
|
||
}
|
||
|
||
/* 从 audiod STATE 文本解析关键字段 */
|
||
static int state_text_parse(const char *t, meow_audio_state *o)
|
||
{
|
||
memset(o, 0, sizeof *o);
|
||
o->route_port = -1;
|
||
const char *p;
|
||
if ((p = strstr(t, "active="))) o->active = atoi(p + 7);
|
||
if ((p = strstr(t, "app="))) {
|
||
/* app_id 只取到下一个空白（状态行是空格分隔 k=v，整体拷贝会吞掉后续字段） */
|
||
p += 4;
|
||
size_t k = 0;
|
||
while (p[k] && p[k] != ' ' && p[k] != '\n' && p[k] != '\t' && k < sizeof o->app_id - 1) {
|
||
o->app_id[k] = p[k]; k++;
|
||
}
|
||
o->app_id[k] = 0;
|
||
}
|
||
if ((p = strstr(t, "sid="))) o->stream_id = (uint32_t)atoi(p + 4);
|
||
if ((p = strstr(t, "rate="))) o->rate = (uint32_t)atoi(p + 5);
|
||
if ((p = strstr(t, "ch="))) o->ch = (uint16_t)atoi(p + 3);
|
||
if ((p = strstr(t, "fmt="))) {
|
||
int f = 0;
|
||
if (strncmp(p + 4, "S16", 3) == 0) f = AUDIO_FMT_S16;
|
||
else if (strncmp(p + 4, "S24", 3) == 0) f = AUDIO_FMT_S24;
|
||
else if (strncmp(p + 4, "S32", 3) == 0) f = AUDIO_FMT_S32;
|
||
o->fmt = (uint16_t)f;
|
||
}
|
||
if ((p = strstr(t, "written="))) o->written_frames = (uint64_t)strtoull(p + 8, NULL, 10);
|
||
if ((p = strstr(t, "played="))) o->played_frames = (uint64_t)strtoull(p + 7, NULL, 10);
|
||
if ((p = strstr(t, "underrun="))) o->underrun = (uint32_t)atoi(p + 9);
|
||
if ((p = strstr(t, "paused="))) o->paused = atoi(p + 7);
|
||
if ((p = strstr(t, "port="))) o->route_port = atoi(p + 5);
|
||
if ((p = strstr(t, "vol="))) o->vol = atoi(p + 4);
|
||
if (o->app_id[0] == '\0') snprintf(o->app_id, sizeof o->app_id, "-");
|
||
return 0;
|
||
}
|
||
|
||
int meow_audio_query(meow_audio_state *out)
|
||
{
|
||
if (!out) return MEOW_ERR_INVAL;
|
||
pthread_mutex_lock(&g_mu);
|
||
if (g_direct) {
|
||
memset(out, 0, sizeof *out);
|
||
out->active = g_has_stream;
|
||
out->stream_id = g_sid;
|
||
out->rate = (uint32_t)g_grant_rate;
|
||
out->ch = (uint16_t)g_grant_ch;
|
||
out->fmt = (uint16_t)g_grant_fmt;
|
||
out->route_port = -1;
|
||
pthread_mutex_unlock(&g_mu);
|
||
return 0;
|
||
}
|
||
int fd = conn_locked();
|
||
if (fd < 0) { pthread_mutex_unlock(&g_mu); return MEOW_ERR_NOENT; }
|
||
uint32_t req = g_pending + 1; g_pending = req;
|
||
if (send_frame(g_fd, MSG_AUDIO_QUERY, req, NULL, 0) != 0) { mark_dead_locked(); pthread_mutex_unlock(&g_mu); return MEOW_ERR_IO; }
|
||
struct timespec ts; clock_gettime(CLOCK_REALTIME, &ts); ts.tv_sec += 3;
|
||
while (g_pending == req) { if (pthread_cond_timedwait(&g_cond, &g_mu, &ts) != 0) { pthread_mutex_unlock(&g_mu); return MEOW_ERR_TIMEOUT; } }
|
||
if (g_resp_type != MSG_AUDIO_STATE) { pthread_mutex_unlock(&g_mu); return MEOW_ERR_IO; }
|
||
g_resp[g_resp_len < MEOW_IPC_MAX - 1 ? g_resp_len : MEOW_IPC_MAX - 1] = 0;
|
||
state_text_parse((const char *)g_resp, out);
|
||
pthread_mutex_unlock(&g_mu);
|
||
return 0;
|
||
}
|
||
|
||
void meow_audio_on_preempt(meow_audio_preempt_fn cb, void *ctx)
|
||
{
|
||
pthread_mutex_lock(&g_mu);
|
||
g_preempt_cb = cb;
|
||
g_preempt_ctx = ctx;
|
||
int need = !g_thr_on && !g_direct;
|
||
if (need) { g_quit = 0; g_thr_on = 1; }
|
||
pthread_mutex_unlock(&g_mu);
|
||
if (need) { pthread_create(&g_thr, NULL, audio_thread_main, NULL); pthread_detach(g_thr); }
|
||
}
|
||
|
||
/* 读线程主体：poll 读 audiod 下发帧 → 分发 PREEMPTED / 挂起响应。
|
||
* **不**自行 connect——连接由调用方（open/query 经 conn_locked）建立并启动本线程；
|
||
* 这里只等 g_fd 就绪后 poll（避免与调用方 conn_locked 竞争出新 socket）。 */
|
||
static void *audio_thread_main(void *arg)
|
||
{
|
||
(void)arg;
|
||
while (!g_quit) {
|
||
pthread_mutex_lock(&g_mu);
|
||
int fd = g_fd;
|
||
pthread_mutex_unlock(&g_mu);
|
||
if (fd < 0) { usleep(300000); continue; }
|
||
|
||
struct pollfd p;
|
||
p.fd = fd; p.events = POLLIN; p.revents = 0;
|
||
int pr = poll(&p, 1, 200);
|
||
if (pr < 0 && errno != EINTR) {
|
||
pthread_mutex_lock(&g_mu); mark_dead_locked(); pthread_mutex_unlock(&g_mu);
|
||
continue;
|
||
}
|
||
if (pr > 0 && (p.revents & (POLLHUP | POLLERR | POLLNVAL))) {
|
||
pthread_mutex_lock(&g_mu); mark_dead_locked(); pthread_mutex_unlock(&g_mu);
|
||
continue;
|
||
}
|
||
if (pr > 0 && (p.revents & POLLIN)) {
|
||
uint8_t rbuf[MEOW_IPC_MAX];
|
||
uint16_t type;
|
||
int n = read_frame(fd, &type, rbuf, sizeof rbuf);
|
||
if (n < 0) { pthread_mutex_lock(&g_mu); mark_dead_locked(); pthread_mutex_unlock(&g_mu); continue; }
|
||
if (type == MSG_AUDIO_PREEMPTED && n >= (int)sizeof(m_audio_preempted_t)) {
|
||
m_audio_preempted_t pm;
|
||
memcpy(&pm, rbuf, sizeof pm);
|
||
meow_audio_preempt_fn cb;
|
||
void *ctx;
|
||
pthread_mutex_lock(&g_mu);
|
||
cb = g_preempt_cb; ctx = g_preempt_ctx;
|
||
if (pm.stream_id == g_sid) { g_has_stream = 0; g_dead = 1; g_sid = 0; }
|
||
pthread_mutex_unlock(&g_mu);
|
||
if (cb) cb(pm.by_app, ctx);
|
||
} else if (type == MSG_AUDIO_OPEN_ACK || type == MSG_ACK || type == MSG_AUDIO_STATE) {
|
||
pthread_mutex_lock(&g_mu);
|
||
if (g_pending) {
|
||
g_resp_type = type;
|
||
if ((uint32_t)n > MEOW_IPC_MAX) n = (int)MEOW_IPC_MAX;
|
||
memcpy(g_resp, rbuf, (size_t)n);
|
||
g_resp_len = (uint32_t)n;
|
||
g_pending = 0;
|
||
pthread_cond_signal(&g_cond);
|
||
}
|
||
pthread_mutex_unlock(&g_mu);
|
||
}
|
||
/* 其它类型丢弃 */
|
||
}
|
||
}
|
||
pthread_mutex_lock(&g_mu);
|
||
mark_dead_locked();
|
||
pthread_mutex_unlock(&g_mu);
|
||
return NULL;
|
||
}
|