mbtk/mbtk_lib/src/mbtk_audio.c

/**
 *   \file mbtk_audio.c
 *   \brief A Documented file.
 *
 *  Detailed description
 *   \Author:  js.wang <js.wang@mobiletek.cn>
 *   \Version: 1.0.0
 *   \Date: 2022-03-31
 */
#include <fcntl.h>
#include <stdint.h>
#include <limits.h>
#include <termios.h>
#include <stdarg.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <sys/types.h>
#include "mbtk_log.h"
#include "mbtk_type.h"
#include <libubox/blobmsg_json.h>
#include "libubus.h"
#include "mbtk_audio.h"

/******************************************************************************\
 *  Macros / Defines
\******************************************************************************/

#ifndef UNUSEDPARAM
#define UNUSEDPARAM(a)		(void)(a)
#endif

#define AUDIO_UBUS_REQUEST_NAME         "audio_if"
#define mbtk_dtmf_UBUS_NAME	            "proslic_uBus"      //Used by wake lock
#define DTMFCODEID                      "dtmfcode"
#define DTMFCODE_NOTIFICATION_NAME      "audioif.dtmfcode"
#define AUDIO_UBUS_VOLUME_SET           "volume_set"
#define AUDIO_UBUS_VOLUME_GET           "volume_status"
#define AUDIO_UBUS_MODE_SET             "audio_mode_set"
#define AUDIO_UBUS_PATH_ENABLE          "audio_path_enable"
#define AUDIO_UBUS_SWITCH_PCM           "switch_pcm"
#define AUDIO_UBUS_DSP_SET          	"config_dspgain"
#define AUDIO_UBUS_LOOPBACK_EN          "loopback_enable"
#define AUDIO_UBUS_LOOPBACK_DIS         "loopback_disable"
#define AUDIO_UBUS_AUDIO_GAIN_SET       "audio_gain_set"

// #define DEBUG 1

#ifdef DEBUG
	#define mbtk_audio_log(...)                    mbtk_audio_log(__VA_ARGS__)
#else
	#define mbtk_audio_log(...)
#endif

typedef enum {
    PARAM_INT_POLICY_0,
    PARAM_INT_POLICY_1,
    PARAM_INT_POLICY_2,
    PARAM_INT_POLICY_3,
    PARAM_INT_POLICY_MAX,
} PARAM_INT_POLICY;

#define FAILURE -1
#define ID_RIFF 0x46464952
#define ID_WAVE 0x45564157
#define ID_FMT  0x20746d66
#define ID_DATA 0x61746164
#define FORMAT_PCM 1

struct wav_header {
	uint32_t riff_id;
	uint32_t riff_sz;
	uint32_t riff_fmt;
	uint32_t fmt_id;
	uint32_t fmt_sz;
	uint16_t audio_format;
	uint16_t num_channels;
	uint32_t sample_rate;
	uint32_t byte_rate;       /* sample_rate * num_channels * bps / 8 */
	uint16_t block_align;     /* num_channels * bps / 8 */
	uint16_t bits_per_sample;
	uint32_t data_id;
	uint32_t data_sz;
};

const struct blobmsg_policy int_policy[] ={
	[PARAM_INT_POLICY_0] = {
		.name = "param0",
		.type = BLOBMSG_TYPE_INT32,
	},
};

const struct blobmsg_policy dtmf_code_policy[] = {
	[0] = {
		.name = DTMFCODEID,
		.type = BLOBMSG_TYPE_INT32,
	},
};

static void mbtk_dtmf_add_subscriber_AudioIf(struct uloop_timeout *timeout);
static struct uloop_timeout mbtk_dtmf_add_subscribe_timeout_AudioIf =
{
    .cb = mbtk_dtmf_add_subscriber_AudioIf,
};

static struct blob_buf audio_cm_b;
pthread_mutex_t mbtk_dtmf_mutex;
int  mbtk_dtmf_PMConstraintWorks;
//For UBUS listening to RILD & audio_if
struct mbtk_audio_ubus_db_t
{
    pthread_t  dtmf_pthread;
    mbtk_dtmf_cb dtmf_cb;
    mbtk_volume_cb audio_volume_get_cb;
    int work_state;
    struct ubus_context     *ctx;

    /* Audio_If */
    struct ubus_subscriber 	audioif_event;
    uint32_t	 		    audioif_subscriber_id;
    uint32_t	 		    audioif_request_id;
};

static struct mbtk_audio_ubus_db_t  *mbtk_audio_ubus_db = NULL;


static int record_fd = 0;

#define AUDIO_FILE_DIR	"/data"
#define MBTK_AUD_DEMO_WAV "/data/demo.wav"

int MBTK_wav_pcm16Le_set(int fd)
{
    struct wav_header hdr;

    if (fd <= 0)
        return -1;

    memset(&hdr, 0, sizeof(struct wav_header));

    hdr.riff_id = ID_RIFF;
    hdr.riff_fmt = ID_WAVE;
    hdr.fmt_id = ID_FMT;
    hdr.fmt_sz = 16;
    hdr.audio_format = FORMAT_PCM;
    hdr.num_channels = 1;
    hdr.sample_rate = 8000;
    hdr.bits_per_sample = 16;
    hdr.byte_rate = (8000 * 1 * hdr.bits_per_sample) / 8;
    hdr.block_align = (hdr.bits_per_sample * 1) / 8;
    hdr.data_id = ID_DATA;
    hdr.data_sz = 0;

    hdr.riff_sz = hdr.data_sz + 44 - 8;
    if (write(fd, &hdr, sizeof(hdr)) != sizeof(hdr)) {
        return -1;
    }

    return 0;
}

int create_audio_dir(const char *dirname)
{
    DIR *p_dir;
    int res = -1;

    if(NULL == (p_dir = opendir((const char *)dirname)))
    {
        if(mkdir(dirname, 0777) == 0)
        {
            res = 0;
        }
        else
        {
            fprintf(stderr, "create audio dir error \n");
            res = -1;
        }
    }
    else
    {
        closedir(p_dir);
        res = 0;
    }
    return res;
}
int mbtk_at_play(const char *args)
{
    int fd = 0;
    int play_hdl = 0;
    char databuf[1024];
    int size;

    LOGI("%s %d", __FUNCTION__, __LINE__);
    // play_hdl = Ql_AudPlayer_Open(NULL, NULL);
    play_hdl = mbtk_audio_open(0, 1, 8000, NULL);
    if(0 == play_hdl)
        printf("Ql_AudPlayer_Open fail\n");

    fd = open(MBTK_AUD_DEMO_WAV, O_RDWR);
    if (fd <= 0)
    {
        printf("file open error\n");
        goto err;
    }
    memset(databuf, 0, sizeof(databuf));
    while(0 < (size = read(fd, databuf, sizeof(databuf))))
    {
        if(-1 == mbtk_audio_play_stream(play_hdl, databuf, size))
            break;
    }
    mbtk_audio_log("aplay Stream end \n");

err:
    if(fd > 0)
        close(fd);
    mbtk_audio_close(play_hdl);

    return 0;
}

void record_cb_func(int cb_result, char* databuf, unsigned int len)
{
    int rc;

    if(NULL != databuf && len > 0 && record_fd > 0)
    {
        //for debug:save into file
        rc = write(record_fd, databuf, len);
        if (rc < 0) {
            printf("%s: error writing to file!\n", __FUNCTION__);
        } else if (rc < len) {
            printf("%s: wrote less the buffer size!\n", __FUNCTION__);
        }
    }
}

int mbtk_at_rec(const char *args)
{
    LOGI("%s %d", __FUNCTION__, __LINE__);
    //hdl = Ql_AudRecorder_Open(NULL, record_cb_func);
    void *record_hdl = mbtk_audio_open(1, 1, 8000, NULL);
    if (record_hdl == NULL)
    {
        printf("AudRecorder open error\n");
        return -1;
    }

    create_audio_dir(AUDIO_FILE_DIR);
    record_fd = open(MBTK_AUD_DEMO_WAV, O_RDWR|O_CREAT|O_TRUNC, 0644);
    if (record_fd <= 0)
    {
        printf("file open error\n");
        goto err;
    }

    if(0 == MBTK_wav_pcm16Le_set(record_fd))// 设置格式，否则音频播放不了
    {
        if( 0 != mbtk_audio_record(record_hdl, record_cb_func, NULL))
        {
            printf("file write error\n");
            close(record_fd);
            record_fd = 0;
        }
    }
    else
    {
        printf("arec set file header error\n");
        close(record_fd);
        record_fd = 0;
    }

    sleep(10);// 录音 10S
err:
    mbtk_audio_close(record_hdl);// 关闭录音
    record_hdl = NULL;
    if(record_fd > 0)
    {
        close(record_fd);
        record_fd = 0;
    }

    return 0;
}

static void mbtk_ubus_complete_cb(struct ubus_request *req, int rc)
{
    if(NULL == mbtk_audio_ubus_db)
    {
        printf("mbtk_dtmf_ubus not init!\n");
        return;
    }
    if (req)
    {
        free(req);
        req = NULL;
    }
    mbtk_audio_log("%s do nothing, rc=%d\n", __FUNCTION__, rc);
    LOGI("%s do nothing, rc=%d\n", __FUNCTION__, rc);
    if(mbtk_audio_ubus_db->work_state)
        mbtk_audio_ubus_db->work_state--;
}
/**
 * @brief      mbtk_audio_mode_set
 *
 * @details    detailed description
 *
 * @param      param
 *             "param0": UINT32
 *             typedef enum {
 *                 AUDIO_MODE_INVALID = -2,
 *                 AUDIO_MODE_CURRENT = -1,
 *                 AUDIO_MODE_NORMAL = 0,
 *                 AUDIO_MODE_RINGTONE = 1,
 *                 AUDIO_MODE_IN_CALL = 2,
 *                 AUDIO_MODE_IN_COMMUNICATION=3,
 *                 AUDIO_MODE_IN_VT_CALL= 4,
 *                 AUDIO_MODE_CNT,
 *                 AUDIO_MODE_MAX = AUDIO_MODE_CNT-1,
 *             } audio_mode_
 * @return     return type
 */
void mbtk_audio_mode_set(int mode)
{
    int rc = 0;
    struct ubus_request *req = NULL;

    if(NULL == mbtk_audio_ubus_db)
    {
        printf("mbtk_dtmf_ubus not init!\n");
        return;
    }
    req = (struct ubus_request *)malloc(sizeof(struct ubus_request));
    if (req == NULL)
    {
        printf("leave %s: lack of memory\n", __FUNCTION__);
        return;
    }
    memset(req, 0, sizeof(struct ubus_request));
    blob_buf_init(&audio_cm_b, 0);
    blobmsg_add_u32(&audio_cm_b, "param0", mode);
    if ((rc = ubus_invoke_async(mbtk_audio_ubus_db->ctx,
                                mbtk_audio_ubus_db->audioif_request_id,
                                AUDIO_UBUS_MODE_SET,
                                audio_cm_b.head, req)) != UBUS_STATUS_OK)
    {
        free(req);
        printf("%s, ubus_invoke_async %s failed %s\n", __FUNCTION__, AUDIO_UBUS_MODE_SET, ubus_strerror(rc));
    }
    else
    {
        printf("%s: ubus_invoke_async success\n", __FUNCTION__);
        mbtk_audio_ubus_db->work_state++;
        req->complete_cb = mbtk_ubus_complete_cb;
        ubus_complete_request_async(mbtk_audio_ubus_db->ctx, req);
    }
}


void mbtk_audio_path_enable(int mode)
{
    int rc = 0;
    struct ubus_request *req = NULL;

    if(NULL == mbtk_audio_ubus_db)
    {
        printf("mbtk_dtmf_ubus not init!\n");
        return;
    }
    req = (struct ubus_request *)malloc(sizeof(struct ubus_request));
    if (req == NULL)
    {
        printf("leave %s: lack of memory\n", __FUNCTION__);
        return;
    }
    memset(req, 0, sizeof(struct ubus_request));
    blob_buf_init(&audio_cm_b, 0);
    blobmsg_add_u32(&audio_cm_b, "param0", mode);
    if ((rc = ubus_invoke_async(mbtk_audio_ubus_db->ctx,
                                mbtk_audio_ubus_db->audioif_request_id,
                                AUDIO_UBUS_PATH_ENABLE,
                                audio_cm_b.head, req)) != UBUS_STATUS_OK)
    {
        free(req);
        printf("%s, ubus_invoke_async %s failed %s\n", __FUNCTION__, AUDIO_UBUS_PATH_ENABLE, ubus_strerror(rc));
    }
    else
    {
        printf("%s: ubus_invoke_async success\n", __FUNCTION__);
        mbtk_audio_ubus_db->work_state++;
        req->complete_cb = mbtk_ubus_complete_cb;
        ubus_complete_request_async(mbtk_audio_ubus_db->ctx, req);
    }
}


/**
 * @brief      mbtk_audio_switch_pcm
 *
 * @details    detailed description
 *
 * @param      param
 *             "param0":UINT32 mode
 *             0: Turn off MSA PCM
 *             1: Turn on MSA PCM as NB PCM(i.e. 8KHz sample rate)
 *             2: Turn on MSA PCM as WB PCM(i.e. 16KHz sample rate)
 * @return     return type
 */
void mbtk_audio_switch_pcm(int mode)
{
    int rc = 0;
    struct ubus_request *req = NULL;

    if(NULL == mbtk_audio_ubus_db)
    {
        printf("mbtk_dtmf_ubus not init!\n");
        return;
    }
    req = (struct ubus_request *)malloc(sizeof(struct ubus_request));
    if (req == NULL)
    {
        printf("leave %s: lack of memory\n", __FUNCTION__);
        return;
    }
    memset(req, 0, sizeof(struct ubus_request));
    blob_buf_init(&audio_cm_b, 0);
    blobmsg_add_u32(&audio_cm_b, "param0", mode);
    if ((rc = ubus_invoke_async(mbtk_audio_ubus_db->ctx,
                                mbtk_audio_ubus_db->audioif_request_id,
                                AUDIO_UBUS_SWITCH_PCM,
                                audio_cm_b.head, req)) != UBUS_STATUS_OK)
    {
        free(req);
        printf("%s, ubus_invoke_async %s failed %s\n", __FUNCTION__, AUDIO_UBUS_MODE_SET, ubus_strerror(rc));
    }
    else
    {
        printf("%s: ubus_invoke_async success\n", __FUNCTION__);
        mbtk_audio_ubus_db->work_state++;
        req->complete_cb = mbtk_ubus_complete_cb;
        ubus_complete_request_async(mbtk_audio_ubus_db->ctx, req);
    }
}

int mbtk_audio_dsp_set(int type, int gain)
{
    LOGE("1type:%d, gain:%d\n", type, gain);
    int rc = 0;
    struct ubus_request *req = NULL;

    if(NULL == mbtk_audio_ubus_db)
    {
        LOGE("mbtk_dtmf_ubus not init!\n");
        return -1;
    }
    req = (struct ubus_request *)malloc(sizeof(struct ubus_request));
    if (req == NULL)
    {
        LOGE("leave %s: lack of memory\n", __FUNCTION__);
        return -1;
    }

    memset(req, 0, sizeof(struct ubus_request));
    blob_buf_init(&audio_cm_b, 0);
    blobmsg_add_u32(&audio_cm_b, "type", type);
	blobmsg_add_u32(&audio_cm_b, "gain", gain);
    if ((rc = ubus_invoke_async(mbtk_audio_ubus_db->ctx,
                                mbtk_audio_ubus_db->audioif_request_id,
                                AUDIO_UBUS_DSP_SET,
                                audio_cm_b.head, req)) != UBUS_STATUS_OK)
    {
        free(req);
        LOGE("%s, ubus_invoke_async %s failed %s\n", __FUNCTION__, AUDIO_UBUS_DSP_SET, ubus_strerror(rc));
        return -1;
    }
    else
    {
        LOGE("%s: ubus_invoke_async success\n", __FUNCTION__);
        mbtk_audio_ubus_db->work_state++;
        req->complete_cb = mbtk_ubus_complete_cb;
        ubus_complete_request_async(mbtk_audio_ubus_db->ctx, req);
    }
    return 0;
}
/**
 * @brief      mbtk_audio_loopback_start
 *
 * @details    detailed description
 *
 * @param      param
 *             device: UINT32
 *             0: earpiece
 *             1: speaker
 *             2: headset
 * @return     return type
 */
static void mbtk_audio_loopback_start(int device)
{
    int rc = 0;
    struct ubus_request *req = NULL;

    if(NULL == mbtk_audio_ubus_db)
    {
        LOGI("mbtk_dtmf_ubus not init!\n");
        return;
    }
    req = (struct ubus_request *)malloc(sizeof(struct ubus_request));
    if (req == NULL)
    {
        LOGI("leave %s: lack of memory\n", __FUNCTION__);
        return;
    }
    memset(req, 0, sizeof(struct ubus_request));
    blob_buf_init(&audio_cm_b, 0);
    blobmsg_add_u32(&audio_cm_b, "param0", device);
    if ((rc = ubus_invoke_async(mbtk_audio_ubus_db->ctx,
                                mbtk_audio_ubus_db->audioif_request_id,
                                AUDIO_UBUS_LOOPBACK_EN,
                                audio_cm_b.head, req)) != UBUS_STATUS_OK)
    {
        free(req);
        LOGI("%s, ubus_invoke_async volume get failed %s\n", __FUNCTION__,  ubus_strerror(rc));
    }
    else
    {
        LOGI("%s: ubus_invoke_async success\n", __FUNCTION__);
        req->complete_cb = mbtk_ubus_complete_cb;
        ubus_complete_request_async(mbtk_audio_ubus_db->ctx, req);
    }
}

static void mbtk_audio_loopback_stop(void)
{
    int rc = 0;

    if(NULL == mbtk_audio_ubus_db)
    {
        printf("mbtk_dtmf_ubus not init!\n");
        return;
    }
    blob_buf_init(&audio_cm_b, 0);

    if ((rc = ubus_invoke(mbtk_audio_ubus_db->ctx,
                          mbtk_audio_ubus_db->audioif_request_id,
                          AUDIO_UBUS_LOOPBACK_DIS,
                          audio_cm_b.head, NULL, 0, 0)) != UBUS_STATUS_OK)
    {
        LOGI("%s, ubus_invoke volume get failed %s\n", __FUNCTION__,  ubus_strerror(rc));
    }
    else
    {
        LOGI("%s: ubus_invoke success\n", __FUNCTION__);
    }
}

int mbtk_at_loopback(int type)
{
    static mbtk_audio_client_handle_type audio_handle = 0;
    int ret = 0;

    LOGI("%s %d:%d", __FUNCTION__, __LINE__, type);
    if(0 == type) // Stop
    {
        mbtk_audio_loopback_stop();
        if(audio_handle)
        {
            mbtk_audio_ubus_client_deinit(audio_handle);
            audio_handle = 0;
        }
    }
    else // Start
    {
        if(NULL == mbtk_audio_ubus_db)
            ret = mbtk_audio_ubus_client_init(&audio_handle, NULL);
        if(ret)
        {
            return -1;
        }
        mbtk_audio_mode_set(0);
        mbtk_audio_loopback_start(2);
    }

    return 0;
}

/*****************************************************  \
 *   Retry mechanism to add subscriber for Audio_if
\*****************************************************/
static void mbtk_dtmf_add_subscriber_AudioIf(struct uloop_timeout *timeout)
{
    /* add subscriber for Audio_If */
    if (ubus_lookup_id(mbtk_audio_ubus_db->ctx, DTMFCODE_NOTIFICATION_NAME, &mbtk_audio_ubus_db->audioif_subscriber_id))
    {
        printf("%s, Failed to look up %s\n", __FUNCTION__, DTMFCODE_NOTIFICATION_NAME);
        uloop_timeout_set(timeout, 2000);
        return;
    }

    ubus_subscribe(mbtk_audio_ubus_db->ctx, &mbtk_audio_ubus_db->audioif_event, mbtk_audio_ubus_db->audioif_subscriber_id);
    mbtk_audio_log("Audio_If subscribe %s object ok\n", DTMFCODE_NOTIFICATION_NAME);
    return;
}
/*******************************************************************************\
*   Function:      mbtk_dtmf_uBus_pmConstraint
*   Description:   Lock/unlock system power management.
*                   0: unlock
*                   1: lock
*   Returns:
\*******************************************************************************/
static void mbtk_dtmf_uBus_PMConstraint(int set)
{
    FILE *flk;
    if (mbtk_dtmf_PMConstraintWorks != 0)
        return; //wake_lock unavailable or not exist. Do nothing

#ifdef PROSLIC_ENABLEFREERUN
    mbtk_audio_log("%s(%d): %s\n", __FUNCTION__, set, set ? "no sleep" : "sleep after 7s");
#else
    mbtk_audio_log("%s(%d): free-run is disabled, no sleep\n", __FUNCTION__, set);
#endif

    /* Do Not check fopen success. It must be ok, if failed
    ** (for any reason) better to crash for logging and recovery
    */
    flk = fopen("/sys/power/wake_lock", "w");
    if(set)
    {
        fprintf(flk, mbtk_dtmf_UBUS_NAME);
    }
    else
    {
#ifdef PROSLIC_ENABLEFREERUN
        /* Clear constraint but with TimeOut enough
        ** Stay awake for (mbtk_dtmf_DIAL_TIMER + 1) seconds, wait for ringing timer expire
        */
        fprintf(flk, mbtk_dtmf_UBUS_NAME " 7000000000"/*nsec*/);
#endif
    }

    fclose(flk);
}

/*******************************************************************************\
*   Function:       mbtk_dtmf_uBusInd_AudioIf_remove
*   Description:    Handle upon Audio_if remove indication.
*   Returns:
\*******************************************************************************/
static void mbtk_dtmf_uBusInd_AudioIf_remove(struct ubus_context *ctx, struct ubus_subscriber *s,
                              uint32_t id)
{
    UNUSEDPARAM(ctx);
    UNUSEDPARAM(s);
    UNUSEDPARAM(id);

    mbtk_audio_log("%s\n", __FUNCTION__);
    uloop_timeout_set(&mbtk_dtmf_add_subscribe_timeout_AudioIf, 2000);
}


/*******************************************************************************\
*   Function:       mbtk_dtmf_uBusInd_AudioIf
*   Description:    Handle upon Audio_If incoming indication.
*   Returns:        0 on success
\*******************************************************************************/
static int mbtk_dtmf_uBusInd_AudioIf(struct ubus_context *ctx, struct ubus_object *obj,
                               struct ubus_request_data *req, const char *method,
                               struct blob_attr *msg)
{
    UNUSEDPARAM(ctx);
    UNUSEDPARAM(obj);
    UNUSEDPARAM(req);
    UNUSEDPARAM(method);

    char DTMFCode = 0;
    struct blob_attr *tb[1];
    int rc = 0;

    //Lock from mbtk_dtmf interrupt handler (mbtk_dtmf_MainLoop)
    pthread_mutex_lock(&mbtk_dtmf_mutex);
    mbtk_audio_log("==================================%s : Begin==================================\n", __FUNCTION__);
    mbtk_dtmf_uBus_PMConstraint(1);

    /*parsing blob to be accessed easily with tb array - parse "1" argument*/
    rc = blobmsg_parse(dtmf_code_policy, 1, tb, blob_data(msg), blob_len(msg));

    if (rc < 0) {
    	printf("%s: parsing fail, rc = 0x%x\n", __FUNCTION__, rc);
    }
    else {
        DTMFCode = (char)blobmsg_get_u32(tb[0]);
        if(mbtk_audio_ubus_db->dtmf_cb)
            mbtk_audio_ubus_db->dtmf_cb(DTMFCode);
        mbtk_audio_log("%s got DTMF Code: Char[%c]=ASCII[0x%x]\n", __FUNCTION__, DTMFCode, DTMFCode);
    }

    mbtk_dtmf_uBus_PMConstraint(0);
    mbtk_audio_log("==================================%s : End==================================", __FUNCTION__);
    pthread_mutex_unlock(&mbtk_dtmf_mutex);

    return rc;
}

/*******************************************************************************\
*   Function:       mbtk_dtmf_uBusRegisterNotifications
*   Description:    Register UBUS notifications of RIL and Audio_If.
*   Returns:        0 on success
\*******************************************************************************/
static int mbtk_dtmf_uBusRegisterNotifications(void)
{
    int ret = 0;

    /* register UBUS notifications of Audio_If */
    ret = ubus_register_subscriber(mbtk_audio_ubus_db->ctx, &mbtk_audio_ubus_db->audioif_event);
    if (ret)
    {
        printf("%s Failed to add audio_if watch handler: %s\n", __FUNCTION__, ubus_strerror(ret));
        return -1;
    }

    /* specify callback to handle notifications */
    mbtk_audio_ubus_db->audioif_event.remove_cb = mbtk_dtmf_uBusInd_AudioIf_remove;
    mbtk_audio_ubus_db->audioif_event.cb = mbtk_dtmf_uBusInd_AudioIf;

    /* add subscribe */
    uloop_timeout_set(&mbtk_dtmf_add_subscribe_timeout_AudioIf, 0);

    mbtk_audio_log("%s: Make use of DTMF detection in modem.\n", __FUNCTION__);

    return 0;
}

void mbtk_switch_dtmf_detection_cb(struct ubus_request *req, int rc)
{
    if (req)
    {
        free(req);
        req = NULL;
    }
    mbtk_audio_log("%s do nothing, rc=%d\n", __FUNCTION__, rc);
}
/**
 * @brief      mbtk_switch_dtmf_detection
 *
 * @details    detailed description
 *
 * @param      param
 *            “param0": UINT32 onoff
 *              0: disbale Tx DTMF detection
 *              1: enable Tx DTMF detection
 *              2: disbale Rx DTMF detection
 *              3: enable Rx DTMF detection
 * @return     return type
 */
void mbtk_switch_dtmf_detection(unsigned short on_off, unsigned short param1,
                                unsigned short param2, unsigned short param3)
{
#if PCM_CTRL_OVER_VCM
    vcm_DTMFDetection(on_off, param1, param2, param3);
#else
    int rc = 0;
    struct ubus_request *req = NULL;

    if(NULL == mbtk_audio_ubus_db)
    {
        printf("mbtk_dtmf_ubus not init!\n");
        return;
    }
    req = (struct ubus_request *)malloc(sizeof(struct ubus_request));
    if (req == NULL)
    {
        printf("leave %s: lack of memory\n", __FUNCTION__);
        return;
    }
    memset(req, 0, sizeof(struct ubus_request));
    blob_buf_init(&audio_cm_b, 0);
    blobmsg_add_u32(&audio_cm_b, "param0", on_off);
    blobmsg_add_u32(&audio_cm_b, "param1", param1);
    blobmsg_add_u32(&audio_cm_b, "param2", param2);
    blobmsg_add_u32(&audio_cm_b, "param3", param3);

    if ((rc = ubus_invoke_async(mbtk_audio_ubus_db->ctx, mbtk_audio_ubus_db->audioif_request_id, "dtmf_detection", audio_cm_b.head, req)) != UBUS_STATUS_OK)
    {
        free(req);
        printf("%s, ubus_invoke dtmf_detection failed %s\n", __FUNCTION__,  ubus_strerror(rc));
    }
    else
    {
        mbtk_audio_log("%s: ubus_invoke_async success\n", __FUNCTION__);
        req->complete_cb = mbtk_switch_dtmf_detection_cb;
        ubus_complete_request_async(mbtk_audio_ubus_db->ctx, req);
    }
#endif
}
/*******************************************************************************\
*   Function:       mbtk_dtmf_uBusInit
*   Description:    Init UBUS context and register UBUS notifications of RIL.
*   Returns:        0 on success
\*******************************************************************************/
int mbtk_dtmf_uBusInit(void)
{
    int rc = 0;

    uloop_init();

    mbtk_audio_ubus_db->ctx = ubus_connect(NULL);
    if (mbtk_audio_ubus_db->ctx == NULL)
    {
        printf(" %s Failed to connect to ubus\n", __FUNCTION__);
        return -1;
    }

    ubus_add_uloop(mbtk_audio_ubus_db->ctx);

    /* lookup fail if audio_if is not ready */
    while(1)
    {
        rc = ubus_lookup_id(mbtk_audio_ubus_db->ctx, AUDIO_UBUS_REQUEST_NAME, &mbtk_audio_ubus_db->audioif_request_id);
        if (0 != rc)
        {
            printf("%s, Failed to look up(%s), rc=%d\n", __FUNCTION__, AUDIO_UBUS_REQUEST_NAME, rc);
            usleep(600000); //600ms
        }
        else
            break;
    }
    mbtk_audio_log("%s, ubus_lookup_id(%s) OK\n", __FUNCTION__, AUDIO_UBUS_REQUEST_NAME);

    /* subscribe for RIL & audio_if notifications */
    if (mbtk_dtmf_uBusRegisterNotifications() != 0)
        return -1;

    mbtk_audio_log("%s success!\n", __FUNCTION__);
    return 0;
}


/*******************************************************************************\
*   Function:       mbtk_dtmf_uBusRun
*   Description:    Start running of UBUS.
*   Returns:
\*******************************************************************************/
static void mbtk_audio_ubus_thread(void* hdl)
{
    pthread_detach(pthread_self());
    uloop_run();
    mbtk_audio_log("%s exit!\n", __FUNCTION__);
    pthread_exit(NULL);
}

int mbtk_audio_ubus_client_init(mbtk_audio_client_handle_type *ph_audio, mbtk_dtmf_cb cb)
{
    int id;

    // Set call handle.
    if(ph_audio == NULL || mbtk_audio_ubus_db != NULL)
    {
        printf("ARG error or has inited.");
        return -1;
    }
    mbtk_audio_ubus_db = malloc(sizeof(struct mbtk_audio_ubus_db_t));
    if(NULL == mbtk_audio_ubus_db)
    {
        printf("malloc memory error\n");
    }
    memset(mbtk_audio_ubus_db, 0, sizeof(struct mbtk_audio_ubus_db_t));

	mbtk_dtmf_PMConstraintWorks = access("/sys/power/wake_lock", R_OK | W_OK);
    mbtk_dtmf_uBusInit();
    mbtk_audio_ubus_db->dtmf_cb = cb;

    mbtk_switch_dtmf_detection(3, 50, 4, 3);
    pthread_create(&mbtk_audio_ubus_db->dtmf_pthread, NULL, (void *)mbtk_audio_ubus_thread, (void *)mbtk_audio_ubus_db);

    *ph_audio = mbtk_audio_ubus_db;
    LOGI("%s %d:%x", __FUNCTION__, __LINE__, mbtk_audio_ubus_db);

    return 0;
}

int mbtk_audio_ubus_client_deinit(mbtk_audio_client_handle_type h_audio)
{
    int ret;
    struct mbtk_audio_ubus_db_t *audio_ubus = (struct mbtk_audio_ubus_db_t *)h_audio;

    mbtk_audio_log("%s \n", __FUNCTION__);
    if(h_audio == NULL || mbtk_audio_ubus_db == NULL)
    {
        printf("ARG error or not inited.");
        return -1;
    }
    LOGI("%s %d:%x", __FUNCTION__, __LINE__, audio_ubus);
    ret = pthread_cancel(audio_ubus->dtmf_pthread);
    mbtk_audio_log("kill pthread : %d \n", ret);
    pthread_join(audio_ubus->dtmf_pthread, NULL);
    do{
        ret = pthread_kill(audio_ubus->dtmf_pthread, 0);
        mbtk_audio_log("kill pthread: %d \n", ret);
        if(ret == ESRCH)
            mbtk_audio_log("The specified thread does not exist or has terminated\n");
        else if(ret == EINVAL)
            mbtk_audio_log("Useless signal\n");
        else
            mbtk_audio_log("The thread exists\n");
        usleep(100000);
    }while(0 == ret);
    LOGI("%s %d", __FUNCTION__, __LINE__);

    mbtk_switch_dtmf_detection(2, 0, 0, 0);
    /*unregister uloop*/
    /*thread will get here only if uloop stopped*/
    ubus_free(mbtk_audio_ubus_db->ctx);
    uloop_done();
    LOGI("%s %d", __FUNCTION__, __LINE__);
    free(h_audio);
    mbtk_audio_ubus_db = NULL;

    return 0;
}

/**********************************************************************\
*   Function:      APP_Audio_VolumeSet
*   Description:   This function is called to send command into audio_if.
*   unsigned int volume(0~100)
*   Returns:        0 on success
\**********************************************************************/
void mbtk_audio_ubus_volume_set(unsigned int volume)
{
    int rc = 0;
    struct ubus_request *req = NULL;

    if(NULL == mbtk_audio_ubus_db)
    {
        printf("mbtk_dtmf_ubus not init!\n");
        return;
    }
    req = (struct ubus_request *)malloc(sizeof(struct ubus_request));
    if (req == NULL)
    {
        printf("leave %s: lack of memory\n", __FUNCTION__);
        return;
    }
    memset(req, 0, sizeof(struct ubus_request));
    blob_buf_init(&audio_cm_b, 0);
    blobmsg_add_u32(&audio_cm_b, "param0", volume);

    if ((rc = ubus_invoke_async(mbtk_audio_ubus_db->ctx, mbtk_audio_ubus_db->audioif_request_id, AUDIO_UBUS_VOLUME_SET, audio_cm_b.head, req)) != UBUS_STATUS_OK)
    {
        free(req);
        printf("%s, ubus_invoke_async volume set failed: %s\n", __FUNCTION__,  ubus_strerror(rc));
    }
    else
    {
        mbtk_audio_log("%s: ubus_invoke_async success\n", __FUNCTION__);
        req->complete_cb = mbtk_ubus_complete_cb;
        ubus_complete_request_async(mbtk_audio_ubus_db->ctx, req);
    }
}

// TX : 0-10; RX : 11
#define MBTK_AUDIO_GAIN_NUM 12
void mbtk_audio_ubus_gain_set(uint8 *gain, int gain_num)
{
    int rc = 0;
    struct ubus_request *req = NULL;

    req = (struct ubus_request *)malloc(sizeof(struct ubus_request));
    if (req == NULL)
    {
        printf("leave %s: lack of memory\n", __FUNCTION__);
        return;
    }
    if(gain_num != MBTK_AUDIO_GAIN_NUM) {
        printf("gain_num error.\n");
        return;
    }
    memset(req, 0, sizeof(struct ubus_request));
    blob_buf_init(&audio_cm_b, 0);

    char name[20];
    int i = 0;
    // Set TX
    for(; i < gain_num - 1; i++) {
        memset(name, 0x0, 20);
        sprintf(name, "volume_gain_%d", i);
        blobmsg_add_u8(&audio_cm_b, name, gain[i]);
    }

    // Set RX
    blobmsg_add_u8(&audio_cm_b, "volume_gain_rx", gain[i]);

#if 1
    if ((rc = ubus_invoke_async(mbtk_audio_ubus_db->ctx, mbtk_audio_ubus_db->audioif_request_id, AUDIO_UBUS_AUDIO_GAIN_SET, audio_cm_b.head, req)) != UBUS_STATUS_OK)
    {
        free(req);
        printf("%s, ubus_invoke_async volume set failed: %s\n", __FUNCTION__,  ubus_strerror(rc));
    }
    else
    {
        printf("%s: ubus_invoke_async success\n", __FUNCTION__);
        req->complete_cb = mbtk_ubus_complete_cb;
        ubus_complete_request_async(mbtk_audio_ubus_db->ctx, req);
    }
#else
    if ((rc = ubus_invoke(APP_ctx, APP_audio_request_id, AUDIO_UBUS_AUDIO_GAIN_SET, audio_cm_b.head, NULL, 0, 0)) != UBUS_STATUS_OK)
    {
        printf("%s, ubus_invoke_async volume set failed: %s\n", __FUNCTION__, ubus_strerror(rc));
    }
    else
    {
        printf("%s: ubus_invoke_async success\n", __FUNCTION__);
    }
    free(req);
#endif
}


static void audio_volume_get_data_cb (struct ubus_request *req, int type, struct blob_attr *msg)
{
    UNUSEDPARAM(req);
    UNUSEDPARAM(type);
    struct blob_attr *tb[1];
    unsigned int volume = 888;
    int rc = 0;

    rc = blobmsg_parse(int_policy, 1, tb, blob_data(msg), blob_len(msg));
    if (rc < 0)
    {
    	printf("[%s] parsing blobmsg failed\n", __FUNCTION__);
    	return;
    }

    if(tb[0])
        volume = blobmsg_get_u32(tb[0]);
    if (mbtk_audio_ubus_db->audio_volume_get_cb)
        mbtk_audio_ubus_db->audio_volume_get_cb(volume);
    mbtk_audio_log("%s; volume:%d\n", __FUNCTION__, volume);
}

void mbtk_audio_ubus_volume_get(mbtk_volume_cb cb)
{
    int rc = 0;
    struct ubus_request *req = NULL;

    if(NULL == mbtk_audio_ubus_db ||  NULL == cb)
    {
        printf("mbtk_dtmf_ubus not init or callback invalid!\n");
        return;
    }
    mbtk_audio_ubus_db->audio_volume_get_cb = cb;
    req = (struct ubus_request *)malloc(sizeof(struct ubus_request));
    if (req == NULL)
    {
        printf("leave %s: lack of memory\n", __FUNCTION__);
        return;
    }
    memset(req, 0, sizeof(struct ubus_request));
    blob_buf_init(&audio_cm_b, 0);

    if ((rc = ubus_invoke_async(mbtk_audio_ubus_db->ctx,
                                mbtk_audio_ubus_db->audioif_request_id,
                                AUDIO_UBUS_VOLUME_GET,
                                audio_cm_b.head, req)) != UBUS_STATUS_OK)
    {
        free(req);
        printf("%s, ubus_invoke_async volume get failed %s\n", __FUNCTION__,  ubus_strerror(rc));
    }
    else
    {
        mbtk_audio_log("%s: ubus_invoke_async success\n", __FUNCTION__);
        req->data_cb = audio_volume_get_data_cb;
        req->complete_cb = mbtk_ubus_complete_cb;
        ubus_complete_request_async(mbtk_audio_ubus_db->ctx, req);
    }
}