音视频传输及对讲模块

iv_avt_init //音视频传输模块初始化，注册回调
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(音视频传输，接收信令，接收音频)
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iv_avt_exit //音视频传输模块去初始化   

iv_avt_get_av_enc_info_cb //获取音视频编码
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iv_avt_start_real_play_cb //开始播放
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while(1){iv_avt_send_stream} //推流
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iv_avt_stop_real_play_cb  //停止推流
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停止调用iv_avt_send_stream

iv_avt_start_recv_stream_cb //开始接收音频回调
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iv_avt_recv_stream_cb //接收数据流,并进行解码播放
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iv_avt_stop_recv_stream_cb //停止接收

iv_avt_recv_command_cb //接收信令
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处理信令      //处理信令

int iv_avt_init(const iv_avt_init_parm_s *pstInitParm);

int iv_avt_exit(void);

int iv_avt_send_stream(uint32_t visitor, uint32_t channel, iv_avt_video_res_type_e video_res_type,
                       iv_avt_stream_type_e stream_type, void *p_stream);

int iv_avt_get_send_stream_status(uint32_t visitor, uint32_t channel,
                                  iv_avt_video_res_type_e video_res_type,
                                  iv_p2p_send_stats_s *stream_send_status);

size_t iv_avt_get_send_stream_buf(uint32_t visitor, uint32_t channel,
                                  iv_avt_video_res_type_e video_res_type);

int iv_avt_send_finish_stream(uint32_t visitor, uint32_t channel,
                              iv_avt_video_res_type_e video_res_type);

int iv_avt_send_command(uint32_t visitor, const char *msg, size_t msg_len, unsigned char *recv_buf,
                        size_t *recv_len, uint32_t timeout_ms);

const char *iv_avt_get_peerinfo(void);

void (*iv_avt_get_av_enc_info_cb)(uint32_t visitor, uint32_t channel, iv_avt_video_res_type_e video_res_type,iv_cm_av_data_info_s *av_data_info);

void (*iv_avt_start_real_play_cb)(uint32_t visitor, uint32_t channel, iv_avt_video_res_type_e video_res_type,void *args);

void (*iv_avt_stop_real_play_cb)(uint32_t visitor, uint32_t channel, iv_avt_video_res_type_e video_res_type);

int (*iv_avt_start_recv_stream_cb)(uint32_t visitor, uint32_t channel, iv_cm_av_data_info_s *p_av_data_info);

int (*iv_avt_stop_recv_stream_cb)(uint32_t visitor, uint32_t channel, iv_avt_stream_type_e stream_type);

int (*iv_avt_recv_stream_cb)(uint32_t visitor, uint32_t channel, iv_avt_stream_type_e stream_type, void *p_stream);

void (*iv_avt_recv_user_data_cb)(uint32_t visitor,uint32_t channel, const char *src, uint32_t src_len,
                                    iv_cm_memory_s *dst);

void (*iv_avt_notify_cb)(iv_avt_event_e event, uint32_t visitor, uint32_t channel,
                            iv_avt_stream_type_e stream_type);

int (*iv_avt_recv_command_cb)(iv_avt_command_type_e command, uint32_t visitor, uint32_t channel,
                                iv_avt_video_res_type_e video_res_type, void *args);

int (*iv_avt_download_file_cb)(iv_avt_download_status_e status, uint32_t visitor,
                                uint32_t channel, void *args);

typedef enum
{
    IV_AVT_STREAM_TYPE_AUDIO = 0, /*audio*/
    IV_AVT_STREAM_TYPE_VIDEO = 1, /*video*/
    IV_AVT_STREAM_TYPE_AV    = 2, /*audio+video*/

    IV_AVT_STREAM_TYPE_BUTT
} iv_avt_stream_type_e;

typedef enum
{
    IV_AVT_DEV_ACCEPT = 0, /* device accept app request */
    IV_AVT_DEV_REFUSE = 1, /* device refuse app request*/
    IV_AVT_DEV_STATUS_BUTT = 10
} iv_avt_device_status_e;

typedef enum
{
    IV_AVT_REQUEST_SEND_STREAM = 0, /* app request device to send stream */
    IV_AVT_REQUEST_RECV_STREAM = 1, /* app request device to receice stream, only support audio*/
    IV_AVT_REQUEST_BUTT
} iv_avt_request_type_e;

typedef enum
{
    IV_AVT_VIDEO_RES_FL = 0,  // fluency stream
    IV_AVT_VIDEO_RES_SD = 1,  // standard stream
    IV_AVT_VIDEO_RES_HD = 2,  // high stream
    IV_AVT_VIDEO_RES_PB = 3,  // playback stream

    IV_AVT_VIDEO_RES_BUTT
} iv_avt_video_res_type_e;

typedef struct {
    char *src;           // input data
    uint32_t src_len;    // input data length
    iv_cm_memory_s dst;  // output data
} iv_avt_usr_data_parm_s;

typedef struct {
    iv_avt_request_type_e request_type;     // input data
    iv_avt_device_status_e request_result;  // output data
} iv_avt_req_stream_param_s;

typedef struct {
    iv_cm_memory_s name;
    uint8_t is_online;
} iv_avt_chn_name_param_s;

typedef enum
{
    IV_AVT_EVENT_P2P_PEER_READY        = 0,  
    IV_AVT_EVENT_P2P_PEER_CONNECT_FAIL = 1,  
    IV_AVT_EVENT_P2P_PEER_ERROR        = 2,  
    IV_AVT_EVENT_P2P_PEER_ADDR_CHANGED = 3,  
    IV_AVT_EVENT_P2P_WATERMARK_LOW     = 4,  
    IV_AVT_EVENT_P2P_WATERMARK_WARN    = 5,  
    IV_AVT_EVENT_P2P_WATERMARK_HIGH    = 6, 
    IV_AVT_EVENT_P2P_LOCAL_NET_READY   = 7,
    IV_AVT_EVENT_P2P_BUTT
} iv_avt_event_e;

typedef enum
{
    IV_AVT_COMMAND_USR_DATA   = 0,  // usr define data, for example ptz
    IV_AVT_COMMAND_REQ_STREAM = 1,  // request stream (send or receive)
    IV_AVT_COMMAND_CHN_NAME   = 2,  // get channel name
    IV_AVT_COMMAND_REQ_IFRAME = 3,  // request I frame

    // playback command
    IV_AVT_COMMAND_PLAYBACK_PAUSE,        // pause playback
    IV_AVT_COMMAND_PLAYBACK_RESUME,       // resume playback
    IV_AVT_COMMAND_PLAYBACK_QUERY_MONTH,  // query record info of month
    IV_AVT_COMMAND_PLAYBACK_QUERY_DAY,    // query record info of day
    IV_AVT_COMMAND_PLAYBACK_SEEK,         // seek record position
    IV_AVT_COMMAND_PLAYBACK_FF,           // playback fast forward(快进)
    IV_AVT_COMMAND_PLAYBACK_SPEED,        // playback speed(快放 or 慢放)
    IV_AVT_COMMAND_PLAYBACK_REWIND,       // rewind record(倒放)

    IV_AVT_COMMAND_TYPE_BUTT
} iv_avt_command_type_e;

typedef enum
{
    IV_AVT_DOWNLOAD_STATUS_START,  // start to download
    IV_AVT_DOWNLOAD_STATUS_RUNNING,
    IV_AVT_DOWNLOAD_STATUS_STOP,  // stop to download
    IV_AVT_DOWNLOAD_STATUS_BUTT
} iv_avt_download_status_e;