C++ PJ_LOG函数代码示例

/* Public function to parse multipart message bodies into its parts */
PJ_DEF(pjsip_msg_body*) pjsip_multipart_parse(pj_pool_t *pool,
					      char *buf, pj_size_t len,
					      const pjsip_media_type *ctype,
					      unsigned options)
{
    pj_str_t boundary, delim;
    char *curptr, *endptr;
    const pjsip_param *ctype_param;
    const pj_str_t STR_BOUNDARY = { "boundary", 8 };
    pjsip_msg_body *body = NULL;

    PJ_ASSERT_RETURN(pool && buf && len && ctype && !options, NULL);

    TRACE_((THIS_FILE, "Started parsing multipart body"));

    /* Get the boundary value in the ctype */
    boundary.ptr = NULL;
    boundary.slen = 0;
    ctype_param = pjsip_param_find(&ctype->param, &STR_BOUNDARY);
    if (ctype_param) {
	boundary = ctype_param->value;
	if (boundary.slen>2 && *boundary.ptr=='"') {
	    /* Remove quote */
	    boundary.ptr++;
	    boundary.slen -= 2;
	}
	TRACE_((THIS_FILE, "Boundary is specified: '%.*s'", (int)boundary.slen,
		boundary.ptr));
    }

    if (!boundary.slen) {
	/* Boundary not found or not specified. Try to be clever, get
	 * the boundary from the body.
	 */
	char *p=buf, *end=buf+len;

	PJ_LOG(4,(THIS_FILE, "Warning: boundary parameter not found or "
			     "not specified when parsing multipart body"));

	/* Find the first "--". This "--" must be right after a CRLF, unless
	 * it really appears at the start of the buffer.
	 */
	for (;;) {
	    while (p!=end && *p!='-') ++p;
	    if (p!=end && *(p+1)=='-' &&
		((p>buf && *(p-1)=='\n') || (p==buf)))
	    {
		p+=2;
		break;
	    } else {
		++p;
	    }
	}

	if (p==end) {
	    /* Unable to determine boundary. Maybe this is not a multipart
	     * message?
	     */
	    PJ_LOG(4,(THIS_FILE, "Error: multipart boundary not specified and"
				 " unable to calculate from the body"));
	    return NULL;
	}

	boundary.ptr = p;
	while (p!=end && !pj_isspace(*p)) ++p;
	boundary.slen = p - boundary.ptr;

	TRACE_((THIS_FILE, "Boundary is calculated: '%.*s'",
		(int)boundary.slen, boundary.ptr));
    }

    /* Build the delimiter:
     *   delimiter = "--" boundary
     */
    delim.slen = boundary.slen+2;
    delim.ptr = (char*)pj_pool_alloc(pool, (int)delim.slen);
    delim.ptr[0] = '-';
    delim.ptr[1] = '-';
    pj_memcpy(delim.ptr+2, boundary.ptr, boundary.slen);

    /* Start parsing the body, skip until the first delimiter. */
    curptr = buf;
    endptr = buf + len;
    {
	pj_str_t body;

	body.ptr = buf; body.slen = len;
	curptr = pj_strstr(&body, &delim);
	if (!curptr)
	    return NULL;
    }

    body = pjsip_multipart_create(pool, ctype, &boundary);

    for (;;) {
	char *start_body, *end_body;
	pjsip_multipart_part *part;

	/* Eat the boundary */
//.........这里部分代码省略.........

/*
 * Generate response digest. 
 * Most of the parameters to generate the digest (i.e. username, realm, uri,
 * and nonce) are expected to be in the credential. Additional parameters (i.e.
 * password and method param) should be supplied in the argument.
 *
 * The resulting digest will be stored in cred->response.
 * The pool is used to allocate 32 bytes to store the digest in cred->response.
 */
static pj_status_t respond_digest( pj_pool_t *pool,
				   pjsip_digest_credential *cred,
				   const pjsip_digest_challenge *chal,
				   const pj_str_t *uri,
				   const pjsip_cred_info *cred_info,
				   const pj_str_t *cnonce,
				   pj_uint32_t nc,
				   const pj_str_t *method)
{
    const pj_str_t pjsip_AKAv1_MD5_STR = { "AKAv1-MD5", 9 };

    /* Check algorithm is supported. We support MD5 and AKAv1-MD5. */
    if (chal->algorithm.slen==0 ||
	(pj_stricmp(&chal->algorithm, &pjsip_MD5_STR) ||
	 pj_stricmp(&chal->algorithm, &pjsip_AKAv1_MD5_STR)))
    {
	;
    }
    else {
	PJ_LOG(4,(THIS_FILE, "Unsupported digest algorithm \"%.*s\"",
		  chal->algorithm.slen, chal->algorithm.ptr));
	return PJSIP_EINVALIDALGORITHM;
    }

    /* Build digest credential from arguments. */
    pj_strdup(pool, &cred->username, &cred_info->username);
    pj_strdup(pool, &cred->realm, &chal->realm);
    pj_strdup(pool, &cred->nonce, &chal->nonce);
    pj_strdup(pool, &cred->uri, uri);
    pj_strdup(pool, &cred->algorithm, &chal->algorithm);
    pj_strdup(pool, &cred->opaque, &chal->opaque);

    /* Allocate memory. */
    cred->response.ptr = (char*) pj_pool_alloc(pool, PJSIP_MD5STRLEN);
    cred->response.slen = PJSIP_MD5STRLEN;

    if (chal->qop.slen == 0) {
	/* Server doesn't require quality of protection. */

	if ((cred_info->data_type & EXT_MASK) == PJSIP_CRED_DATA_EXT_AKA) {
	    /* Call application callback to create the response digest */
	    return (*cred_info->ext.aka.cb)(pool, chal, cred_info, 
					    method, cred);
	} 
	else {
	    /* Convert digest to string and store in chal->response. */
	    pjsip_auth_create_digest( &cred->response, &cred->nonce, NULL, 
				      NULL,  NULL, uri, &chal->realm, 
				      cred_info, method);
	}

    } else if (has_auth_qop(pool, &chal->qop)) {
	/* Server requires quality of protection. 
	 * We respond with selecting "qop=auth" protection.
	 */
	cred->qop = pjsip_AUTH_STR;
	cred->nc.ptr = (char*) pj_pool_alloc(pool, 16);
	cred->nc.slen = pj_ansi_snprintf(cred->nc.ptr, 16, "%08u", nc);

	if (cnonce && cnonce->slen) {
	    pj_strdup(pool, &cred->cnonce, cnonce);
	} else {
	    pj_str_t dummy_cnonce = { "b39971", 6};
	    pj_strdup(pool, &cred->cnonce, &dummy_cnonce);
	}

	if ((cred_info->data_type & EXT_MASK) == PJSIP_CRED_DATA_EXT_AKA) {
	    /* Call application callback to create the response digest */
	    return (*cred_info->ext.aka.cb)(pool, chal, cred_info, 
					    method, cred);
	}
	else {
	    pjsip_auth_create_digest( &cred->response, &cred->nonce, 
				      &cred->nc, cnonce, &pjsip_AUTH_STR, 
				      uri, &chal->realm, cred_info, method );
	}

    } else {
	/* Server requires quality protection that we don't support. */
	PJ_LOG(4,(THIS_FILE, "Unsupported qop offer %.*s", 
		  chal->qop.slen, chal->qop.ptr));
	return PJSIP_EINVALIDQOP;
    }

    return PJ_SUCCESS;
}

//.........这里部分代码省略.........


	if (rc == WAIT_OBJECT_0)
		break;
	if (rc == (WAIT_OBJECT_0 + 1)) {
	    if (events[1] == strm->play_strm.hEvent)
	        signalled_dir = PJMEDIA_DIR_PLAYBACK;
	    else
	        signalled_dir = PJMEDIA_DIR_CAPTURE;
	} else {
	    if (events[2] == strm->play_strm.hEvent)
	        signalled_dir = PJMEDIA_DIR_PLAYBACK;
	    else
	        signalled_dir = PJMEDIA_DIR_CAPTURE;
	}


	if (signalled_dir == PJMEDIA_DIR_PLAYBACK) {
	    
	    struct dsound_stream *dsound_strm;

	    /*
	     * DirectSound has requested us to feed some frames to
	     * playback buffer.
	     */

	    dsound_strm = &strm->play_strm;
	    status = PJ_SUCCESS;

	    while (dsound_play_empty_size(dsound_strm) > bytes_per_frame) {
		/* Get frame from application. */
		status = (*strm->play_cb)(strm->user_data, 
					  dsound_strm->timestamp.u32.lo,
					  strm->buffer,
					  bytes_per_frame);
		if (status != PJ_SUCCESS)
		    break;

		/* Write to DirectSound buffer. */
		AppWriteDataToBuffer( dsound_strm->ds.play.lpDsBuffer, 
				      dsound_strm->dwBytePos,
				      (LPBYTE)strm->buffer, 
				      bytes_per_frame);

		/* Increment position. */
		dsound_strm->dwBytePos += bytes_per_frame;
		if (dsound_strm->dwBytePos >= dsound_strm->dwDsBufferSize)
		    dsound_strm->dwBytePos -= dsound_strm->dwDsBufferSize;
		dsound_strm->timestamp.u64 += strm->samples_per_frame;
	    }

	} else {
	    /*
	     * DirectSound has indicated that it has some frames ready
	     * in the capture buffer. Get as much frames as possible to
	     * prevent overflows.
	     */
	    struct dsound_stream *dsound_strm;
	    BOOL rc;

	    dsound_strm = &strm->rec_strm;

	    /* Fetch while we have more than 1 frame */
	    while (dsound_captured_size(dsound_strm) > bytes_per_frame) {

		/* Capture from DirectSound buffer. */
		rc = AppReadDataFromBuffer(dsound_strm->ds.capture.lpDsBuffer, 
					   dsound_strm->dwBytePos,
					   (LPBYTE)strm->buffer, 
					   bytes_per_frame);
        	
		if (!rc) {
		    pj_bzero(strm->buffer, bytes_per_frame);
		} 

		/* Call callback */
		status = (*strm->rec_cb)(strm->user_data, 
					 dsound_strm->timestamp.u32.lo, 
					 strm->buffer, 
					 bytes_per_frame);

		/* Quit thread on error. */
		if (status != PJ_SUCCESS)
		    goto on_error;


		/* Increment position. */
		dsound_strm->dwBytePos += bytes_per_frame;
		if (dsound_strm->dwBytePos >= dsound_strm->dwDsBufferSize)
		    dsound_strm->dwBytePos -= dsound_strm->dwDsBufferSize;
		dsound_strm->timestamp.u64 += strm->samples_per_frame;
	    }
	}
    }


on_error:
    PJ_LOG(5,(THIS_FILE, "DirectSound: thread stopping.."));
    return 0;
}

static int ca_thread_func (void *arg)
{
    struct bb10_stream* stream = (struct bb10_stream *) arg;
    int size                   = stream->ca_buf_size;
    unsigned long nframes      = stream->ca_frames;
    void *user_data            = stream->user_data;
    /* Buffer to fill for PJMEDIA */
    char *buf 		       = stream->ca_buf;
    pj_timestamp tstamp;
    int result;
    int policy;
    struct sched_param param;

    TRACE_((THIS_FILE, "ca_thread_func: size = %d ", size));

    if (pthread_getschedparam(pthread_self(), &policy, &param) == 0) {
	param.sched_priority = 18;
	pthread_setschedparam (pthread_self(), policy, &param);
    }

    pj_bzero (buf, size);
    tstamp.u64 = 0;

    /* Final init now the thread has started */
    if ((result = snd_pcm_plugin_prepare (stream->ca_pcm,
                                          SND_PCM_CHANNEL_CAPTURE)) < 0)
    {
        TRACE_((THIS_FILE, "ca_thread_func failed prepare = %d", result));
        return PJ_SUCCESS;
    }

    while (!stream->quit) {
        pjmedia_frame frame;

        //pj_bzero (buf, size);

        /* read the input device */
        result = snd_pcm_plugin_read(stream->ca_pcm, buf,size);
        if(result <0 || result != size) {
            /* We expect result to be size (640)
             * It's not so we have to read the status error and "prepare"
             * the channel. This usually happens when output audio routing
             * has been changed by another thread.
             * We won't "continue", instead just do what we can and leave
             * the end of the loop to write what's in the buffer. Not entirely
             * correct but saves a potential underrun in PJMEDIA
             */
            PJ_LOG (4,(THIS_FILE,
        	       "snd_pcm_plugin_read ERROR read = %d required = %d",
        	       result,size));
            snd_pcm_channel_status_t status;
            status.channel = SND_PCM_CHANNEL_CAPTURE;
            if ((result = snd_pcm_plugin_status (stream->ca_pcm, &status)) < 0)
            {
        	/* Should not fail but all we can do is continue */
        	PJ_LOG(4,(THIS_FILE, "capture: snd_pcm_plugin_status ret = %d",
        		  result));
            } else {
        	/* RIM say these are the errors that we should "prepare"
        	 * after */
        	if (status.status == SND_PCM_STATUS_READY ||
        		status.status == SND_PCM_STATUS_OVERRUN ||
        		status.status == SND_PCM_STATUS_ERROR ||
        		status.status == SND_PCM_STATUS_CHANGE)
        	{
        	    if (snd_pcm_plugin_prepare (stream->ca_pcm,
        	                                SND_PCM_CHANNEL_CAPTURE) < 0)
        	    {
        		PJ_LOG (4,(THIS_FILE,
        			   "overrun: capture channel prepare  error"));
        	    }
        	}
            }
        }

        if (stream->quit)
            break;

        /* Write the capture audio data to PJMEDIA */
        frame.type = PJMEDIA_FRAME_TYPE_AUDIO;
        frame.buf = (void *) buf;
        frame.size = size;
        frame.timestamp.u64 = tstamp.u64;
        frame.bit_info = 0;

        result = stream->ca_cb (user_data, &frame);
        if (result != PJ_SUCCESS || stream->quit)
            break;

        tstamp.u64 += nframes;
    }

    flush_capture(stream);
    TRACE_((THIS_FILE, "ca_thread_func: Stopped"));

    return PJ_SUCCESS;
}

//.........这里部分代码省略.........

    /*
     * Create DirectSound device.
     */
    hr = DirectSoundCreate(dev_info[dev_id].lpGuid, &ds_strm->ds.play.lpDs, 
			   NULL);
    if (FAILED(hr))
	return PJ_RETURN_OS_ERROR(hr);

    hwnd = GetForegroundWindow();
    if (hwnd == NULL) {
	hwnd = GetDesktopWindow();
    }    
    hr = IDirectSound_SetCooperativeLevel( ds_strm->ds.play.lpDs, hwnd, 
					   DSSCL_PRIORITY);
    if FAILED(hr)
	return PJ_RETURN_OS_ERROR(hr);
    
    /*
     * Set up wave format structure for initialize DirectSound play
     * buffer. 
     */
    init_waveformatex(&pcmwf, clock_rate, channel_count);
    bytes_per_frame = samples_per_frame * BYTES_PER_SAMPLE;

    /* Set up DSBUFFERDESC structure. */
    pj_bzero(&dsbdesc, sizeof(DSBUFFERDESC)); 
    dsbdesc.dwSize = sizeof(DSBUFFERDESC); 
    dsbdesc.dwFlags = DSBCAPS_CTRLVOLUME | DSBCAPS_CTRLPOSITIONNOTIFY |
		      DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_GLOBALFOCUS;

    dsbdesc.dwBufferBytes = buffer_count * bytes_per_frame;
    dsbdesc.lpwfxFormat = (LPWAVEFORMATEX)&pcmwf; 

    /*
     * Create DirectSound playback buffer. 
     */
    hr = IDirectSound_CreateSoundBuffer(ds_strm->ds.play.lpDs, &dsbdesc, 
					&ds_strm->ds.play.lpDsBuffer, NULL); 
    if (FAILED(hr) )
	return PJ_RETURN_OS_ERROR(hr);

    /*
     * Create event for play notification.
     */
    ds_strm->hEvent = CreateEvent( NULL, FALSE, FALSE, NULL);
    if (ds_strm->hEvent == NULL)
	return pj_get_os_error();

    /*
     * Setup notification for play.
     */
    hr = IDirectSoundBuffer_QueryInterface( ds_strm->ds.play.lpDsBuffer, 
					    &IID_IDirectSoundNotify, 
					    (LPVOID *)&ds_strm->lpDsNotify); 
    if (FAILED(hr))
	return PJ_RETURN_OS_ERROR(hr);

    
    for (i=0; i<buffer_count; ++i) {
	dsPosNotify[i].dwOffset = i * bytes_per_frame;
	dsPosNotify[i].hEventNotify = ds_strm->hEvent;
    }
    
    hr = IDirectSoundNotify_SetNotificationPositions( ds_strm->lpDsNotify, 
						      buffer_count, 
						      dsPosNotify);
    if (FAILED(hr))
	return PJ_RETURN_OS_ERROR(hr);


    hr = IDirectSoundBuffer_SetCurrentPosition(ds_strm->ds.play.lpDsBuffer, 0);
    if (FAILED(hr))
	return PJ_RETURN_OS_ERROR(hr);


    ds_strm->dwBytePos = 0;
    ds_strm->dwDsBufferSize = buffer_count * bytes_per_frame;
    ds_strm->timestamp.u64 = 0;
    /*
     * Play latency does not need to be on a frame boundry, it is just how far
     * ahead of the read pointer we set the write pointer.  So we should just
     * use the user configured latency.  However, if the latency measured in
     * bytes causes more buffers than we are allowed, we must cap the latency
     * at the time contained in 1-buffer_count.
     */
    max_latency = (1 - buffer_count) * samples_per_frame * 1000 / clock_rate /
        channel_count;
    ds_strm->latency = PJ_MIN(max_latency, snd_output_latency);

    /* Done setting up play device. */
    PJ_LOG(5,(THIS_FILE, 
	      " DirectSound player \"%s\" initialized (clock_rate=%d, "
	      "channel_count=%d, samples_per_frame=%d (%dms))",
	      dev_info[dev_id].info.name,
	      clock_rate, channel_count, samples_per_frame,
	      samples_per_frame * 1000 / clock_rate));

    return PJ_SUCCESS;
}

//.........这里部分代码省略.........

    /* Check that address is a sockaddr_in or sockaddr_in6*/
    PJ_ASSERT_RETURN((rem_addr->addr.sa_family == pj_AF_INET() &&
		      addr_len == sizeof(pj_sockaddr_in)) ||
		     (rem_addr->addr.sa_family == pj_AF_INET6() &&
		      addr_len == sizeof(pj_sockaddr_in6)), PJ_EINVAL);


    listener = (struct tcp_listener*)factory;

    /* Create socket */
    status = pj_sock_socket(rem_addr->addr.sa_family, pj_SOCK_STREAM(),
                            0, &sock);
    if (status != PJ_SUCCESS)
	return status;

    /* Apply QoS, if specified */
    status = pj_sock_apply_qos2(sock, listener->qos_type,
				&listener->qos_params,
				2, listener->factory.obj_name,
				"outgoing SIP TCP socket");

    /* Bind to listener's address and any port */
    pj_bzero(&local_addr, sizeof(local_addr));
    pj_sockaddr_cp(&local_addr, &listener->bound_addr);
    pj_sockaddr_set_port(&local_addr, 0);

    status = pj_sock_bind(sock, &local_addr,
                          pj_sockaddr_get_len(&local_addr));
    if (status != PJ_SUCCESS) {
	pj_sock_close(sock);
	return status;
    }

    /* Get the local port */
    addr_len = sizeof(local_addr);
    status = pj_sock_getsockname(sock, &local_addr, &addr_len);
    if (status != PJ_SUCCESS) {
	pj_sock_close(sock);
	return status;
    }

    /* Initially set the address from the listener's address */
    if (!pj_sockaddr_has_addr(&local_addr)) {
	pj_sockaddr_copy_addr(&local_addr, &listener->factory.local_addr);
    }

    /* Create the transport descriptor */
    status = tcp_create(listener, NULL, sock, PJ_FALSE, &local_addr, 
			rem_addr, &tcp);
    if (status != PJ_SUCCESS)
	return status;


    /* Start asynchronous connect() operation */
    tcp->has_pending_connect = PJ_TRUE;
    status = pj_activesock_start_connect(tcp->asock, tcp->base.pool, rem_addr,
					 addr_len);
    if (status == PJ_SUCCESS) {
	on_connect_complete(tcp->asock, PJ_SUCCESS);
    } else if (status != PJ_EPENDING) {
	tcp_destroy(&tcp->base, status);
	return status;
    }

    if (tcp->has_pending_connect) {
	/* Update (again) local address, just in case local address currently
	 * set is different now that asynchronous connect() is started.
	 */
	addr_len = sizeof(local_addr);
	if (pj_sock_getsockname(sock, &local_addr, &addr_len)==PJ_SUCCESS) {
	    pj_sockaddr *tp_addr = &tcp->base.local_addr;

	    /* Some systems (like old Win32 perhaps) may not set local address
	     * properly before socket is fully connected.
	     */
	    if (pj_sockaddr_cmp(tp_addr, &local_addr) &&
		pj_sockaddr_get_port(&local_addr) != 0)
	    {
		pj_sockaddr_cp(tp_addr, &local_addr);
		sockaddr_to_host_port(tcp->base.pool, &tcp->base.local_name,
				      &local_addr);
	    }
	}
	
	PJ_LOG(4,(tcp->base.obj_name,
		  "TCP transport %.*s:%d is connecting to %.*s:%d...",
		  (int)tcp->base.local_name.host.slen,
		  tcp->base.local_name.host.ptr,
		  tcp->base.local_name.port,
		  (int)tcp->base.remote_name.host.slen,
		  tcp->base.remote_name.host.ptr,
		  tcp->base.remote_name.port));
    }

    /* Done */
    *p_transport = &tcp->base;

    return PJ_SUCCESS;
}

/*
 * This callback is called by active socket when pending accept() operation
 * has completed.
 */
static pj_bool_t on_accept_complete(pj_activesock_t *asock,
				    pj_sock_t sock,
				    const pj_sockaddr_t *src_addr,
				    int src_addr_len)
{
    struct tcp_listener *listener;
    struct tcp_transport *tcp;
    char addr[PJ_INET6_ADDRSTRLEN+10];
    pjsip_tp_state_callback state_cb;
    pj_sockaddr tmp_src_addr;
    pj_status_t status;

    PJ_UNUSED_ARG(src_addr_len);

    listener = (struct tcp_listener*) pj_activesock_get_user_data(asock);

    PJ_ASSERT_RETURN(sock != PJ_INVALID_SOCKET, PJ_TRUE);

    PJ_LOG(4,(listener->factory.obj_name,
	      "TCP listener %.*s:%d: got incoming TCP connection "
	      "from %s, sock=%d",
	      (int)listener->factory.addr_name.host.slen,
	      listener->factory.addr_name.host.ptr,
	      listener->factory.addr_name.port,
	      pj_sockaddr_print(src_addr, addr, sizeof(addr), 3),
	      sock));

    /* Apply QoS, if specified */
    status = pj_sock_apply_qos2(sock, listener->qos_type,
				&listener->qos_params,
				2, listener->factory.obj_name,
				"incoming SIP TCP socket");

    /* tcp_create() expect pj_sockaddr, so copy src_addr to temporary var,
     * just in case.
     */
    pj_bzero(&tmp_src_addr, sizeof(tmp_src_addr));
    pj_sockaddr_cp(&tmp_src_addr, src_addr);

    /* 
     * Incoming connection!
     * Create TCP transport for the new socket.
     */
    status = tcp_create( listener, NULL, sock, PJ_TRUE,
			 &listener->factory.local_addr,
			 &tmp_src_addr, &tcp);
    if (status == PJ_SUCCESS) {

        /* Add a reference to prevent the transport from being destroyed while
         * we're operating on it.
         */
        pjsip_transport_add_ref(&tcp->base);

	status = tcp_start_read(tcp);
	if (status != PJ_SUCCESS) {
	    PJ_LOG(3,(tcp->base.obj_name, "New transport cancelled"));
            pjsip_transport_dec_ref(&tcp->base);
	    tcp_destroy(&tcp->base, status);
	} else {
	    /* Start keep-alive timer */
	    if (PJSIP_TCP_KEEP_ALIVE_INTERVAL) {
		pj_time_val delay = {PJSIP_TCP_KEEP_ALIVE_INTERVAL, 0};
		pjsip_endpt_schedule_timer(listener->endpt,
					   &tcp->ka_timer,
					   &delay);
		tcp->ka_timer.id = PJ_TRUE;
		pj_gettimeofday(&tcp->last_activity);
	    }

	    /* Notify application of transport state accepted */
	    state_cb = pjsip_tpmgr_get_state_cb(tcp->base.tpmgr);
	    if (state_cb) {
		pjsip_transport_state_info state_info;

		pj_bzero(&state_info, sizeof(state_info));
		(*state_cb)(&tcp->base, PJSIP_TP_STATE_CONNECTED, &state_info);
	    }
            pjsip_transport_dec_ref(&tcp->base);
	}
    }

    return PJ_TRUE;
}

//.........这里部分代码省略.........

    PJ_ASSERT_RETURN(sock != PJ_INVALID_SOCKET, PJ_EINVAL);


    if (pool == NULL) {
	pool = pjsip_endpt_create_pool(listener->endpt, "tcp",
				       POOL_TP_INIT, POOL_TP_INC);
	PJ_ASSERT_RETURN(pool != NULL, PJ_ENOMEM);
    }

    /*
     * Create and initialize basic transport structure.
     */
    tcp = PJ_POOL_ZALLOC_T(pool, struct tcp_transport);
    tcp->is_server = is_server;
    tcp->sock = sock;
    /*tcp->listener = listener;*/
    pj_list_init(&tcp->delayed_list);
    tcp->base.pool = pool;

    pj_ansi_snprintf(tcp->base.obj_name, PJ_MAX_OBJ_NAME,
		     (is_server ? "tcps%p" :"tcpc%p"), tcp);

    status = pj_atomic_create(pool, 0, &tcp->base.ref_cnt);
    if (status != PJ_SUCCESS) {
	goto on_error;
    }

    status = pj_lock_create_recursive_mutex(pool, "tcp", &tcp->base.lock);
    if (status != PJ_SUCCESS) {
	goto on_error;
    }

    tcp->base.key.type = listener->factory.type;
    pj_sockaddr_cp(&tcp->base.key.rem_addr, remote);
    tcp->base.type_name = (char*)pjsip_transport_get_type_name(
				(pjsip_transport_type_e)tcp->base.key.type);
    tcp->base.flag = pjsip_transport_get_flag_from_type(
				(pjsip_transport_type_e)tcp->base.key.type);

    tcp->base.info = (char*) pj_pool_alloc(pool, 64);
    pj_ansi_snprintf(tcp->base.info, 64, "%s to %s",
                     tcp->base.type_name,
                     pj_sockaddr_print(remote, print_addr,
                                       sizeof(print_addr), 3));

    tcp->base.addr_len = pj_sockaddr_get_len(remote);
    pj_sockaddr_cp(&tcp->base.local_addr, local);
    sockaddr_to_host_port(pool, &tcp->base.local_name, local);
    sockaddr_to_host_port(pool, &tcp->base.remote_name, remote);
    tcp->base.dir = is_server? PJSIP_TP_DIR_INCOMING : PJSIP_TP_DIR_OUTGOING;

    tcp->base.endpt = listener->endpt;
    tcp->base.tpmgr = listener->tpmgr;
    tcp->base.send_msg = &tcp_send_msg;
    tcp->base.do_shutdown = &tcp_shutdown;
    tcp->base.destroy = &tcp_destroy_transport;

    /* Create active socket */
    pj_activesock_cfg_default(&asock_cfg);
    asock_cfg.async_cnt = 1;

    pj_bzero(&tcp_callback, sizeof(tcp_callback));
    tcp_callback.on_data_read = &on_data_read;
    tcp_callback.on_data_sent = &on_data_sent;
    tcp_callback.on_connect_complete = &on_connect_complete;

    ioqueue = pjsip_endpt_get_ioqueue(listener->endpt);
    status = pj_activesock_create(pool, sock, pj_SOCK_STREAM(), &asock_cfg,
				  ioqueue, &tcp_callback, tcp, &tcp->asock);
    if (status != PJ_SUCCESS) {
	goto on_error;
    }

    /* Register transport to transport manager */
    status = pjsip_transport_register(listener->tpmgr, &tcp->base);
    if (status != PJ_SUCCESS) {
	goto on_error;
    }

    tcp->is_registered = PJ_TRUE;

    /* Initialize keep-alive timer */
    tcp->ka_timer.user_data = (void*)tcp;
    tcp->ka_timer.cb = &tcp_keep_alive_timer;
    pj_ioqueue_op_key_init(&tcp->ka_op_key.key, sizeof(pj_ioqueue_op_key_t));
    pj_strdup(tcp->base.pool, &tcp->ka_pkt, &ka_pkt);

    /* Done setting up basic transport. */
    *p_tcp = tcp;

    PJ_LOG(4,(tcp->base.obj_name, "TCP %s transport created",
	      (tcp->is_server ? "server" : "client")));

    return PJ_SUCCESS;

on_error:
    tcp_destroy(&tcp->base, status);
    return status;
}

/* Destroy TCP transport */
static pj_status_t tcp_destroy(pjsip_transport *transport,
			       pj_status_t reason)
{
    struct tcp_transport *tcp = (struct tcp_transport*)transport;

    if (tcp->close_reason == 0)
	tcp->close_reason = reason;

    if (tcp->is_registered) {
	tcp->is_registered = PJ_FALSE;
	pjsip_transport_destroy(transport);

	/* pjsip_transport_destroy will recursively call this function
	 * again.
	 */
	return PJ_SUCCESS;
    }

    /* Mark transport as closing */
    tcp->is_closing = PJ_TRUE;

    /* Stop keep-alive timer. */
    if (tcp->ka_timer.id) {
	pjsip_endpt_cancel_timer(tcp->base.endpt, &tcp->ka_timer);
	tcp->ka_timer.id = PJ_FALSE;
    }

    /* Cancel all delayed transmits */
    while (!pj_list_empty(&tcp->delayed_list)) {
	struct delayed_tdata *pending_tx;
	pj_ioqueue_op_key_t *op_key;

	pending_tx = tcp->delayed_list.next;
	pj_list_erase(pending_tx);

	op_key = (pj_ioqueue_op_key_t*)pending_tx->tdata_op_key;

	on_data_sent(tcp->asock, op_key, -reason);
    }

    if (tcp->rdata.tp_info.pool) {
	pj_pool_release(tcp->rdata.tp_info.pool);
	tcp->rdata.tp_info.pool = NULL;
    }

    if (tcp->asock) {
	pj_activesock_close(tcp->asock);
	tcp->asock = NULL;
	tcp->sock = PJ_INVALID_SOCKET;
    } else if (tcp->sock != PJ_INVALID_SOCKET) {
	pj_sock_close(tcp->sock);
	tcp->sock = PJ_INVALID_SOCKET;
    }

    if (tcp->base.lock) {
	pj_lock_destroy(tcp->base.lock);
	tcp->base.lock = NULL;
    }

    if (tcp->base.ref_cnt) {
	pj_atomic_destroy(tcp->base.ref_cnt);
	tcp->base.ref_cnt = NULL;
    }

    if (tcp->base.pool) {
	pj_pool_t *pool;

	if (reason != PJ_SUCCESS) {
	    char errmsg[PJ_ERR_MSG_SIZE];

	    pj_strerror(reason, errmsg, sizeof(errmsg));
	    PJ_LOG(4,(tcp->base.obj_name,
		      "TCP transport destroyed with reason %d: %s",
		      reason, errmsg));

	} else {

	    PJ_LOG(4,(tcp->base.obj_name,
		      "TCP transport destroyed normally"));

	}

	pool = tcp->base.pool;
	tcp->base.pool = NULL;
	pj_pool_release(pool);
    }

    return PJ_SUCCESS;
}

//.........这里部分代码省略.........
     */
    if (cfg->addr_name.host.slen) {
	/* Copy the address */
	listener->factory.addr_name = cfg->addr_name;
	pj_strdup(listener->factory.pool, &listener->factory.addr_name.host,
		  &cfg->addr_name.host);
	listener->factory.addr_name.port = cfg->addr_name.port;

    } else {
	/* No published address is given, use the bound address */

	/* If the address returns 0.0.0.0, use the default
	 * interface address as the transport's address.
	 */
	if (!pj_sockaddr_has_addr(listener_addr)) {
	    pj_sockaddr hostip;

	    status = pj_gethostip(listener->bound_addr.addr.sa_family,
	                          &hostip);
	    if (status != PJ_SUCCESS)
		goto on_error;

	    pj_sockaddr_copy_addr(listener_addr, &hostip);
	}

	/* Save the address name */
	sockaddr_to_host_port(listener->factory.pool, 
			      &listener->factory.addr_name, 
			      listener_addr);
    }

    /* If port is zero, get the bound port */
    if (listener->factory.addr_name.port == 0) {
	listener->factory.addr_name.port = pj_sockaddr_get_port(listener_addr);
    }

    pj_ansi_snprintf(listener->factory.obj_name,
		     sizeof(listener->factory.obj_name),
		     "tcplis:%d",  listener->factory.addr_name.port);


    /* Start listening to the address */
    status = pj_sock_listen(sock, PJSIP_TCP_TRANSPORT_BACKLOG);
    if (status != PJ_SUCCESS)
	goto on_error;


    /* Create active socket */
    pj_activesock_cfg_default(&asock_cfg);
    if (cfg->async_cnt > MAX_ASYNC_CNT)
	asock_cfg.async_cnt = MAX_ASYNC_CNT;
    else
	asock_cfg.async_cnt = cfg->async_cnt;

    pj_bzero(&listener_cb, sizeof(listener_cb));
    listener_cb.on_accept_complete = &on_accept_complete;
    status = pj_activesock_create(pool, sock, pj_SOCK_STREAM(), &asock_cfg,
				  pjsip_endpt_get_ioqueue(endpt),
				  &listener_cb, listener,
				  &listener->asock);

    /* Register to transport manager */
    listener->endpt = endpt;
    listener->tpmgr = pjsip_endpt_get_tpmgr(endpt);
    listener->factory.create_transport = lis_create_transport;
    listener->factory.destroy = lis_destroy;
    listener->is_registered = PJ_TRUE;
    status = pjsip_tpmgr_register_tpfactory(listener->tpmgr,
					    &listener->factory);
    if (status == PJSIP_ETYPEEXISTS) {
        /* It's not a problem if there is already a TCP factory defined. */
        status = PJ_SUCCESS;
    }
    if (status != PJ_SUCCESS) {
	listener->is_registered = PJ_FALSE;
	goto on_error;
    }

    /* Start pending accept() operations */
    status = pj_activesock_start_accept(listener->asock, pool);
    if (status != PJ_SUCCESS)
	goto on_error;

    PJ_LOG(4,(listener->factory.obj_name,
	     "SIP TCP listener ready for incoming connections at %.*s:%d",
	     (int)listener->factory.addr_name.host.slen,
	     listener->factory.addr_name.host.ptr,
	     listener->factory.addr_name.port));

    /* Return the pointer to user */
    if (p_factory) *p_factory = &listener->factory;

    return PJ_SUCCESS;

on_error:
    if (listener->asock==NULL && sock!=PJ_INVALID_SOCKET)
	pj_sock_close(sock);
    lis_destroy(&listener->factory);
    return status;
}

/* Outgoing IM callback. */
static void im_callback(void *token, pjsip_event *e)
{
    pjsua_im_data *im_data = (pjsua_im_data*) token;

    if (e->type == PJSIP_EVENT_TSX_STATE) {

	pjsip_transaction *tsx = e->body.tsx_state.tsx;

	/* Ignore provisional response, if any */
	if (tsx->status_code < 200)
	    return;


	/* Handle authentication challenges */
	if (e->body.tsx_state.type == PJSIP_EVENT_RX_MSG &&
	    (tsx->status_code == 401 || tsx->status_code == 407)) 
	{
	    pjsip_rx_data *rdata = e->body.tsx_state.src.rdata;
	    pjsip_tx_data *tdata;
	    pjsip_auth_clt_sess auth;
	    pj_status_t status;

	    PJ_LOG(4,(THIS_FILE, "Resending IM with authentication"));

	    /* Create temporary authentication session */
	    pjsip_auth_clt_init(&auth,pjsua_var.endpt,rdata->tp_info.pool, 0);
    
	    pjsip_auth_clt_set_credentials(&auth, 
		pjsua_var.acc[im_data->acc_id].cred_cnt,
		pjsua_var.acc[im_data->acc_id].cred);

	    pjsip_auth_clt_set_prefs(&auth, 
				     &pjsua_var.acc[im_data->acc_id].cfg.auth_pref);

	    status = pjsip_auth_clt_reinit_req(&auth, rdata, tsx->last_tx,
					       &tdata);
	    if (status == PJ_SUCCESS) {
		pjsua_im_data *im_data2;

		/* Must duplicate im_data */
		im_data2 = pjsua_im_data_dup(tdata->pool, im_data);

		/* Increment CSeq */
		PJSIP_MSG_CSEQ_HDR(tdata->msg)->cseq++;

		/* Re-send request */
		status = pjsip_endpt_send_request( pjsua_var.endpt, tdata, -1,
						   im_data2, &im_callback);
		if (status == PJ_SUCCESS) {
		    /* Done */
		    return;
		}
	    }
	}

	if (tsx->status_code/100 == 2) {
	    PJ_LOG(4,(THIS_FILE, 
		      "Message \'%s\' delivered successfully",
		      im_data->body.ptr));
	} else {
	    PJ_LOG(3,(THIS_FILE, 
		      "Failed to deliver message \'%s\': %d/%.*s",
		      im_data->body.ptr,
		      tsx->status_code,
		      (int)tsx->status_text.slen,
		      tsx->status_text.ptr));
	}

	if (pjsua_var.ua_cfg.cb.on_pager_status) {
	    pjsua_var.ua_cfg.cb.on_pager_status(im_data->call_id, 
					        &im_data->to,
						&im_data->body,
						im_data->user_data,
						(pjsip_status_code) 
						    tsx->status_code,
						&tsx->status_text);
	}

	if (pjsua_var.ua_cfg.cb.on_pager_status2) {
	    pjsip_rx_data *rdata;

	    if (e->body.tsx_state.type == PJSIP_EVENT_RX_MSG)
		rdata = e->body.tsx_state.src.rdata;
	    else
		rdata = NULL;

	    pjsua_var.ua_cfg.cb.on_pager_status2(im_data->call_id, 
					         &im_data->to,
					 	 &im_data->body,
						 im_data->user_data,
						 (pjsip_status_code) 
						    tsx->status_code,
						 &tsx->status_text,
						 tsx->last_tx,
						 rdata, im_data->acc_id);
	}
    }
}

/*
 * Create a new listener on the specified port.
 */
PJ_DEF(pj_status_t) pj_turn_listener_create_udp( pj_turn_srv *srv,
					        int af,
					        const pj_str_t *bound_addr,
					        unsigned port,
						unsigned concurrency_cnt,
						unsigned flags,
						pj_turn_listener **p_listener)
{
    pj_pool_t *pool;
    struct udp_listener *udp;
    pj_ioqueue_callback ioqueue_cb;
    unsigned i;
    pj_status_t status;

    /* Create structure */
    pool = pj_pool_create(srv->core.pf, "udp%p", 1000, 1000, NULL);
    udp = PJ_POOL_ZALLOC_T(pool, struct udp_listener);
    udp->base.pool = pool;
    udp->base.obj_name = pool->obj_name;
    udp->base.server = srv;
    udp->base.tp_type = PJ_TURN_TP_UDP;
    udp->base.sock = PJ_INVALID_SOCKET;
    udp->base.destroy = &udp_destroy;
    udp->read_cnt = concurrency_cnt;
    udp->base.flags = flags;

    udp->tp.obj_name = udp->base.obj_name;
    udp->tp.info = udp->base.info;
    udp->tp.listener = &udp->base;
    udp->tp.sendto = &udp_sendto;
    udp->tp.add_ref = &udp_add_ref;
    udp->tp.dec_ref = &udp_dec_ref;

    /* Create socket */
    status = pj_sock_socket(af, pj_SOCK_DGRAM(), 0, &udp->base.sock);
    if (status != PJ_SUCCESS)
	goto on_error;

    /* Init bind address */
    status = pj_sockaddr_init(af, &udp->base.addr, bound_addr, 
			      (pj_uint16_t)port);
    if (status != PJ_SUCCESS) 
	goto on_error;
    
    /* Create info */
    pj_ansi_strcpy(udp->base.info, "UDP:");
    pj_sockaddr_print(&udp->base.addr, udp->base.info+4, 
		      sizeof(udp->base.info)-4, 3);

    /* Bind socket */
    status = pj_sock_bind(udp->base.sock, &udp->base.addr, 
			  pj_sockaddr_get_len(&udp->base.addr));
    if (status != PJ_SUCCESS)
	goto on_error;

    /* Register to ioqueue */
    pj_bzero(&ioqueue_cb, sizeof(ioqueue_cb));
    ioqueue_cb.on_read_complete = on_read_complete;
    status = pj_ioqueue_register_sock(pool, srv->core.ioqueue, udp->base.sock,
				      udp, &ioqueue_cb, &udp->key);

    /* Create op keys */
    udp->read_op = (struct read_op**)pj_pool_calloc(pool, concurrency_cnt, 
						    sizeof(struct read_op*));

    /* Create each read_op and kick off read operation */
    for (i=0; i<concurrency_cnt; ++i) {
	pj_pool_t *rpool = pj_pool_create(srv->core.pf, "rop%p", 
					  1000, 1000, NULL);

	udp->read_op[i] = PJ_POOL_ZALLOC_T(pool, struct read_op);
	udp->read_op[i]->pkt.pool = rpool;

	on_read_complete(udp->key, &udp->read_op[i]->op_key, 0);
    }

    /* Done */
    PJ_LOG(4,(udp->base.obj_name, "Listener %s created", udp->base.info));

    *p_listener = &udp->base;
    return PJ_SUCCESS;


on_error:
    udp_destroy(&udp->base);
    return status;
}

/*
 * BB10 - tests loads the audio units and sets up the driver structure
 */
static pj_status_t bb10_add_dev (struct bb10_factory *af)
{
    pjmedia_aud_dev_info *adi;
    int pb_result, ca_result;
    unsigned int handle;
    snd_pcm_t *pcm_handle;

    if (af->dev_cnt >= PJ_ARRAY_SIZE(af->devs))
        return PJ_ETOOMANY;

    adi = &af->devs[af->dev_cnt];

    TRACE_((THIS_FILE, "bb10_add_dev Enter"));

    if ((pb_result = audio_manager_snd_pcm_open_name(AUDIO_TYPE_VIDEO_CHAT,
                                                     &pcm_handle,
                                                     &handle,
                                                     (char*)"voice",
                                                     SND_PCM_OPEN_PLAYBACK))
                                                     >= 0)
    {
	snd_pcm_close (pcm_handle);
	audio_manager_free_handle(handle);
    } else {
        TRACE_((THIS_FILE, "Try to open the device for playback - failure"));
    }

    if ((ca_result = audio_manager_snd_pcm_open_name(AUDIO_TYPE_VIDEO_CHAT,
                                                     &pcm_handle,
                                                     &handle,
                                                     (char*)"voice",
                                                     SND_PCM_OPEN_CAPTURE))
                                                     >= 0)
    {
	snd_pcm_close (pcm_handle);
	audio_manager_free_handle(handle);

    } else {
        TRACE_((THIS_FILE, "Try to open the device for capture - failure"));
    }

    if (pb_result < 0 && ca_result < 0) {
        TRACE_((THIS_FILE, "Unable to open sound device", "preferred"));
        return PJMEDIA_EAUD_NODEV;
    }

    /* Reset device info */
    pj_bzero(adi, sizeof(*adi));

    /* Set device name */
    strcpy(adi->name, "preferred");

    /* Check the number of playback channels */
    adi->output_count = (pb_result >= 0) ? 1 : 0;

    /* Check the number of capture channels */
    adi->input_count = (ca_result >= 0) ? 1 : 0;

    /* Set the default sample rate */
    adi->default_samples_per_sec = 8000;

    /* Driver name */
    strcpy(adi->driver, "BB10");

    ++af->dev_cnt;

    PJ_LOG (4,(THIS_FILE, "Added sound device %s", adi->name));

    return PJ_SUCCESS;
}

/* API: refresh the device list */
static pj_status_t factory_refresh(pjmedia_aud_dev_factory *f)
{    
    struct bd_factory *wf = (struct bd_factory*)f;
    unsigned int i = 0;
    wchar_t *deviceNamep=NULL;
    wchar_t captureDevName[BD_IMAD_MAX_DEV_COUNT][BD_IMAD_MAX_DEV_LENGTH_NAME];
    unsigned int captureDeviceCount = 0;
    wchar_t playbackDevName[BD_IMAD_MAX_DEV_COUNT][BD_IMAD_MAX_DEV_LENGTH_NAME];
    unsigned int playbackDeviceCount = 0;


    if(wf->pool != NULL) {
        pj_pool_release(wf->pool);
        wf->pool = NULL;
    }

    // Enumerate capture sound devices
    while(bdIMADpj_getDeviceName(BD_IMAD_CAPTURE_DEVICES, &deviceNamep) != 
	  BD_PJ_ERROR_IMAD_DEVICE_LIST_EMPTY)
    {
        wcscpy(captureDevName[captureDeviceCount], deviceNamep);
        captureDeviceCount++;
    }

    // Enumerate playback sound devices
    while(bdIMADpj_getDeviceName(BD_IMAD_PLAYBACK_DEVICES, &deviceNamep) != 
	  BD_PJ_ERROR_IMAD_DEVICE_LIST_EMPTY)
    {
        wcscpy(playbackDevName[playbackDeviceCount], deviceNamep);
        playbackDeviceCount++;
    }
    
    // Set devices info
    wf->dev_count = captureDeviceCount + playbackDeviceCount;
    wf->pool = pj_pool_create(wf->pf, "BD_IMAD_DEVICES", 1000, 1000, NULL);
    wf->dev_info = (struct bddev_info*)pj_pool_calloc(wf->pool, wf->dev_count, 
						     sizeof(struct bddev_info));
    
    // Capture device properties
    for(i=0;i<captureDeviceCount;i++) {
        wf->dev_info[i].deviceId = i;
        wf->dev_info[i].info.caps = PJMEDIA_AUD_DEV_CAP_INPUT_VOLUME_SETTING | 
				    PJMEDIA_AUD_DEV_CAP_EC;
        wf->dev_info[i].info.default_samples_per_sec = BD_IMAD_DEFAULT_FREQ;
        strcpy(wf->dev_info[i].info.driver, "BD_IMAD");
        wf->dev_info[i].info.ext_fmt_cnt = 0;
        wf->dev_info[i].info.input_count = BD_IMAD_MAX_CHANNELS;
        wf->dev_info[i].info.output_count = 0;
        strcpy(wf->dev_info[i].info.name, 
	       BD_IMAD_PJ_WCHARtoCHAR(captureDevName[i]));
        wf->dev_info[i].info.routes = 0;
    }

    // Playback device properties
    for(i=0;i<playbackDeviceCount;i++) {
        wf->dev_info[captureDeviceCount+i].deviceId = captureDeviceCount+i;
        wf->dev_info[captureDeviceCount+i].info.caps = 
				PJMEDIA_AUD_DEV_CAP_OUTPUT_VOLUME_SETTING;
        wf->dev_info[captureDeviceCount+i].info.default_samples_per_sec = 
				BD_IMAD_DEFAULT_FREQ;
        strcpy(wf->dev_info[captureDeviceCount+i].info.driver, "BD_IMAD");
        wf->dev_info[captureDeviceCount+i].info.ext_fmt_cnt = 0;
        wf->dev_info[captureDeviceCount+i].info.input_count = 0;
        wf->dev_info[captureDeviceCount+i].info.output_count = 
				BD_IMAD_MAX_CHANNELS;
        strcpy(wf->dev_info[captureDeviceCount+i].info.name, 
	       BD_IMAD_PJ_WCHARtoCHAR(playbackDevName[i]));
        wf->dev_info[captureDeviceCount+i].info.routes = 0;
    }

    PJ_LOG(4, (THIS_FILE, "BDIMAD found %d devices:", wf->dev_count));
    for(i=0; i<wf->dev_count; i++) {
        PJ_LOG(4,   
	       (THIS_FILE, " dev_id %d: %s  (in=%d, out=%d)", 
               i,
               wf->dev_info[i].info.name,
               wf->dev_info[i].info.input_count,
               wf->dev_info[i].info.output_count));
    }    
    return PJ_SUCCESS;
}

/**
 * Play audio received from PJMEDIA
 */
static int pb_thread_func (void *arg)
{
    struct bb10_stream* stream = (struct bb10_stream *) arg;
    int size                   	= stream->pb_buf_size;
    unsigned long nframes	= stream->pb_frames;
    void *user_data            	= stream->user_data;
    char *buf 		       	= stream->pb_buf;
    pj_timestamp tstamp;
    int result = 0;
    int policy;
    struct sched_param param;

    TRACE_((THIS_FILE, "pb_thread_func: size = %d ", size));

    if (pthread_getschedparam(pthread_self(), &policy, &param) == 0) {
	param.sched_priority = 18;
	pthread_setschedparam (pthread_self(), policy, &param);
    }

    pj_bzero (buf, size);
    tstamp.u64 = 0;

    /* Do the final initialization now the thread has started. */
    if ((result = snd_pcm_plugin_prepare(stream->pb_pcm,
                                         SND_PCM_CHANNEL_PLAYBACK)) < 0)
    {
        TRACE_((THIS_FILE, "pb_thread_func failed prepare = %d", result));
        return PJ_SUCCESS;
    }

    while (!stream->quit) {
        pjmedia_frame frame;

        frame.type = PJMEDIA_FRAME_TYPE_AUDIO;
        /* pointer to buffer filled by PJMEDIA */
        frame.buf = buf;
        frame.size = size;
        frame.timestamp.u64 = tstamp.u64;
        frame.bit_info = 0;

        /* Read the audio from pjmedia */
        result = stream->pb_cb (user_data, &frame);
        if (result != PJ_SUCCESS || stream->quit)
            break;

        if (frame.type != PJMEDIA_FRAME_TYPE_AUDIO)
            pj_bzero (buf, size);

        /* Write 640 to play unit */
        result = snd_pcm_plugin_write(stream->pb_pcm,buf,size);
        if (result != size || result < 0) {
	    /* either the write to output device has failed or not the
	     * full amount of bytes have been written. This usually happens
	     * when audio routing is being changed by another thread
	     * Use a status variable for reading the error
	     */
	    snd_pcm_channel_status_t status;
            status.channel = SND_PCM_CHANNEL_PLAYBACK;
            if (snd_pcm_plugin_status (stream->pb_pcm, &status) < 0) {
                /* Call has failed nothing we can do except log and
                 * continue */
            	PJ_LOG(4,(THIS_FILE,
                	  "underrun: playback channel status error"));
            } else {
            	/* The status of the error has been read
            	 * RIM say these are expected so we can "re-prepare" the stream
            	 */
            	PJ_LOG(4,(THIS_FILE,"PLAY thread ERROR status = %d",
            		  status.status));
		if (status.status == SND_PCM_STATUS_READY ||
		    status.status == SND_PCM_STATUS_UNDERRUN ||
		    status.status == SND_PCM_STATUS_ERROR ||
		    status.status == SND_PCM_STATUS_CHANGE)
		{
		    if (snd_pcm_plugin_prepare (stream->pb_pcm,
						SND_PCM_CHANNEL_PLAYBACK) < 0)
		    {
			PJ_LOG(4,(THIS_FILE,
				  "underrun: playback channel prepare error"));
		    }
		}
	    }
        }
	tstamp.u64 += nframes;
    }

    flush_play(stream);
    TRACE_((THIS_FILE, "pb_thread_func: Stopped"));

    return PJ_SUCCESS;
}