实例与频道

void rtc_set_log_level(int level);

void rtc_set_language(const char* lang);

rtc_set_language("en");    // 服务端错误原因改为英文

void* rtc_create();

void rtc_destroy(void* handle);

int rtc_join_channel(void* handle, const char* token);

int rtc_join_channel_sync(void* handle, const char* token, int timeout_ms);

int rtc_get_last_error(void* handle, char* msg_buf, int buf_len);

if (rtc_join_channel_sync(rtc, token, 10000) != RTC_OK) {
    char msg[256];
    int code = rtc_get_last_error(rtc, msg, sizeof(msg));
    fprintf(stderr, "join failed: %d %s\n", code, msg);    // 如 1033 并发已达上限
}

int rtc_leave_channel(void* handle);

void rtc_set_auto_subscribe(void* handle, int auto_audio, int auto_video);

typedef void (*rtc_connection_callback)(void* context, int state);
void rtc_set_connection_callback(void* handle, rtc_connection_callback callback, void* context);

typedef void (*rtc_disconnected_callback)(void* context, int reason, int code, const char* msg);
void rtc_set_disconnected_callback(void* handle, rtc_disconnected_callback callback, void* context);

typedef void (*rtc_user_event_callback)(void* context, const char* uid, int event_type);
void rtc_set_user_event_callback(void* handle, rtc_user_event_callback callback, void* context);

typedef void (*rtc_track_event_callback)(void* context, const char* uid,
                                         rtc_track_info_t* track_info, int event_type);
void rtc_set_track_event_callback(void* handle, rtc_track_event_callback callback, void* context);

typedef void (*rtc_track_sample_callback)(void* context,
                                          rtc_user_info_t* user_info,
                                          rtc_track_info_t* track_info,
                                          uint8_t* data, int len,
                                          int64_t timestamp, int64_t duration);
void rtc_set_track_sample_callback(void* handle, rtc_track_sample_callback callback, void* context);

uint8_t* saved = malloc(len);
memcpy(saved, data, len);   // 需要留存必须拷贝

typedef void (*rtc_custom_msg_callback)(void* context, const rtc_custom_msg_t* msg);
void rtc_set_custom_msg_callback(void* handle, rtc_custom_msg_callback callback, void* context);

void rtc_set_layer_switched_callback(void* handle, rtc_layer_switched_callback callback, void* context);
void rtc_set_connection_quality_callback(void* handle, rtc_connection_quality_callback callback, void* context);
void rtc_set_active_speakers_callback(void* handle, rtc_active_speakers_callback callback, void* context);

rtc_set_log_level(RTC_LOG_INFO);

void* rtc = rtc_create();

// 1) 先注册回调
rtc_set_connection_callback(rtc, on_conn, ctx);
rtc_set_user_event_callback(rtc, on_user, ctx);
rtc_set_track_event_callback(rtc, on_track, ctx);
rtc_set_track_sample_callback(rtc, on_sample, ctx);

// 2) 再配置自动订阅
rtc_set_auto_subscribe(rtc, 1, 1);

// 3) 最后加入频道
rtc_join_channel_sync(rtc, token, 10000);

// ... 业务运行 ...

rtc_leave_channel(rtc);
rtc_destroy(rtc);