C，將GhashTable的鍵傳遞給函數

Question

所以基本上我想從callplace中分離靜音/取消靜音。

我做了一個方法：void janus_audiobridge_mute_toggle_participants(janus_audiobridge_participant *participants[], int size, gboolean muted)

我與撥打：

// Prepare params for mute toggle participant 
janus_audiobridge_participant *participants[] = {&participant}; 
gboolean muted_state = json_is_true(muted); 
int total = sizeof(participants)/sizeof(*participants); 
JANUS_LOG(LOG_WARN, "muted - %s \n", muted_state ? "TRUE" : "FALSE"); 

// Mute participant/participants 
janus_audiobridge_mute_toggle_participants(participants, total, muted_state); 

裏面的janus_audiobridge_mute_toggle_participants

：

GHashTable *parts = participants[0]->room->participants; 
    JANUS_LOG(LOG_WARN, "HOW MANY PARTICIPANTS: %i", g_hash_table_size(parts)); 

這裏是一個參與者和房間的結構：

typedef struct janus_audiobridge_room { 
     guint64 room_id;   /* Unique room ID */ 
     gchar *room_name;   /* Room description */ 
     gchar *room_secret;   /* Secret needed to manipulate (e.g., destroy) this room */ 
     gchar *room_pin;   /* Password needed to join this room, if any */ 
     gboolean is_private;  /* Whether this room is 'private' (as in hidden) or not */ 
     uint32_t sampling_rate;  /* Sampling rate of the mix (e.g., 16000 for wideband; can be 8, 12, 16, 24 or 48kHz) */ 
     gboolean audiolevel_ext; /* Whether the ssrc-audio-level extension must be negotiated or not for new joins */ 
     gboolean record;   /* Whether this room has to be recorded or not */ 
     gchar *record_file;   /* Path of the recording file */ 
     FILE *recording;   /* File to record the room into */ 
     gint64 record_lastupdate; /* Time when we last updated the wav header */ 
     gboolean destroy;   /* Value to flag the room for destruction */ 
     GHashTable *participants; /* Map of participants */ 
     GThread *thread;   /* Mixer thread for this room */ 
     GThread *radio_thread; /* Thread that watches time a person has been unmuted */ 
     gint64 destroyed;   /* When this room has been destroyed */ 
     janus_mutex mutex;   /* Mutex to lock this room instance */ 
     /* RTP forwarders for this room's mix */ 
     GHashTable *rtp_forwarders; /* RTP forwarders list (as a hashmap) */ 
     OpusEncoder *rtp_encoder; /* Opus encoder instance to use for all RTP forwarders */ 
     janus_mutex rtp_mutex;  /* Mutex to lock the RTP forwarders list */ 
     int rtp_udp_sock;   /* UDP socket to use to forward RTP packets */ 
     gboolean is_someone_talking; /* Whereaver someone is talking */ 
     gint64 last_unmute; /* Time when someone last unmuted himself */ 
     gboolean is_conference; /* Default is FALSE, if turned to TRUE everybody can speak at the same time */ 
    } janus_audiobridge_room; 


    typedef struct janus_audiobridge_participant { 
     janus_audiobridge_session *session; 
     janus_audiobridge_room *room; /* Room */ 
     guint64 user_id;  /* Unique ID in the room */ 
     gchar *display;   /* Display name (just for fun) */ 
     gboolean prebuffering; /* Whether this participant needs pre-buffering of a few packets (just joined) */ 
     gboolean active;  /* Whether this participant can receive media at all */ 
     gboolean working;  /* Whether this participant is currently encoding/decoding */ 
     gboolean muted;   /* Whether this participant is muted */ 
     int volume_gain;  /* Gain to apply to the input audio (in percentage) */ 
     gboolean should_receive_audio;   /* Whether send audio to this parcipant */ 
     int opus_complexity; /* Complexity to use in the encoder (by default, DEFAULT_COMPLEXITY) */ 
     /* RTP stuff */ 
     GList *inbuf;   /* Incoming audio from this participant, as an ordered list of packets */ 
     GAsyncQueue *outbuf; /* Mixed audio for this participant */ 
     gint64 last_drop;  /* When we last dropped a packet because the imcoming queue was full */ 
     janus_mutex qmutex;  /* Incoming queue mutex */ 
     int opus_pt;   /* Opus payload type */ 
     int extmap_id;   /* Audio level RTP extension id, if any */ 
     int dBov_level;   /* Value in dBov of the audio level (last value from extension) */ 
     janus_audiobridge_rtp_context context; /* Needed in case the participant changes room */ 
     /* Opus stuff */ 
     OpusEncoder *encoder;  /* Opus encoder instance */ 
     OpusDecoder *decoder;  /* Opus decoder instance */ 
     gboolean reset;    /* Whether or not the Opus context must be reset, without re-joining the room */ 
     GThread *thread;   /* Encoding thread for this participant */ 
     janus_recorder *arc;  /* The Janus recorder instance for this user's audio, if enabled */ 
     janus_mutex rec_mutex;  /* Mutex to protect the recorder from race conditions */ 
     gint64 destroyed;   /* When this participant has been destroyed */ 
     gboolean is_admin;   /* if TRUE - participant is admin */ 
    } janus_audiobridge_participant; 

在上面我的代碼執行得：

[WARN] HOW MANY PARTICIPANTS: 0 
(process:4960): GLib-CRITICAL **: g_hash_table_size: assertion 'hash_table != NULL' failed 

的奇怪的事情是，當我在同一個地方執行相同的代碼我叫toggle_mute方法，它工作正常。

所以我的問題：爲什麼這對每個其他結構鍵，但不是->room->participants？如何解決這個問題？

感謝

我使用開源系統janus-gateway。

Answer 1

「更改{&participant}到{participant}固定我的問題，謝謝放鬆的小費！:)」