mbtk/mbtk_lib/src/mbtk_audio_alsa.c

/**
 *   \file mbtk_audio_alsa.c
 *   \brief A Documented file.
 *
 *  Detailed description
 *   \Author:  js.wang <js.wang@mobiletek.cn>
 *   \Version: 1.0.0
 *   \Date: 2020-09-21
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>

#include "audio_if_types.h"
#include "audio_if_ubus.h"
#include "audio_if_parameter.h"
#include "audio_if.h"
#include "audio_if_api.h"
#include <unistd.h>
#include <sys/stat.h>
#include "audio_if_audio_hw_mrvl.h"
#include "audio_hw_mrvl.h"
#include <cutils/str_parms.h>
#include "vcm.h"
#include "voice_control.h"
#include "mbtk_audio.h"


// #define DEBUG 1

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

typedef int (*_play_callback)(int hdl, int result);

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



struct mopen_audio_t
{
    int device;
    audio_hw_device_t *audio_ahw_dev_ubus;
    struct audio_stream_in *stream_in;
    struct audio_stream_out *stream_out;
    int pcm_packet_size;     //320:NB, 640:WB
    int pipe_data;
    int fd[2];
    pthread_t pid;
    mbtk_audio_state_enum state;
    pthread_mutex_t _cond_mutex;
    pthread_mutex_t _stream_mutex;
    void *usrData;
};
struct record_cb_s
{
    mbtk_audio_record_cb_func _cb;
    void *cb_data;
};

static struct mopen_audio_t *internal_hdl = NULL;


int mbtk_wav_pcm16Le_check(int fd)
{
    printf("MBTK_wav_pcm16Le_check()----------strart5, fd:%d\n", fd);
    struct wav_header hdr;

    if (fd <= 0)
        return -1;

    if (read(fd, &hdr, sizeof(hdr)) != sizeof(hdr))
    {
        printf("\n%s: cannot read header\n", __FUNCTION__);
        return -1;
    }

        printf("hdr.riff_id:%X, hdr.riff_fmt:%X, hdr.fmt_id:%X", hdr.riff_id, hdr.riff_fmt, hdr.fmt_id);

    if ((hdr.riff_id != ID_RIFF)
            || (hdr.riff_fmt != ID_WAVE)
            || (hdr.fmt_id != ID_FMT))
    {
        printf("\n%s: is not a riff/wave file\n", __FUNCTION__);
        return -1;
    }

    if ((hdr.audio_format != FORMAT_PCM) || (hdr.fmt_sz != 16)) {
        printf("\n%s: is not pcm format\n", __FUNCTION__);
        return -1;
    }

    if (hdr.bits_per_sample != 16) {
        printf("\n%s: is not 16bit per sample\n", __FUNCTION__);
        return -1;
    }

    printf("audio_format: %d,num_channels: %d,sample_rate: %d,byte_rate: %d,bits_per_sample:  %d data_sz: %d\n",
           hdr.audio_format, hdr.num_channels, hdr.sample_rate, hdr.byte_rate, hdr.bits_per_sample, hdr.data_sz);

    return hdr.data_sz;
}


static void simulateOffhook(struct mopen_audio_t *aud_hdl, unsigned int onoff)
{
    unsigned int pcm_on;
    unsigned int DTMFDetectiononoff;
    unsigned int dialToneToOthersTones;
    unsigned int dialTonesToOthersDialTones;
    unsigned int dialVadDuration;

    pcm_on = onoff;
    //send the command of "AUDIOSTUB_PCMCTL"
    aud_hdl->audio_ahw_dev_ubus->switch_pcm(aud_hdl->audio_ahw_dev_ubus, pcm_on);

    DTMFDetectiononoff = onoff;
    dialToneToOthersTones = 50;
    dialTonesToOthersDialTones = 4;
    dialVadDuration = 3;
    //send the command of "AUDIOSTUB_DTMFDETECTIONCTL"
    //vcm_DTMFDetection(1, 50, 4, 3);
    vcm_DTMFDetection(DTMFDetectiononoff, dialToneToOthersTones, dialTonesToOthersDialTones, dialVadDuration);

    return;
}
static int config_parameters(int in_out, int NBWB)
{
    unsigned int direction = 0xFF, type, srcdst, priority, dest;
    char kvpair[128];
    struct str_parms *param = NULL;
    int data[5];
    const char *key = NULL;
    bool update_vcm = false;

    direction = in_out;/* 0-play, 1-record */
    type = NBWB; /* 0:PCM_NB_BUF_SIZE, 1:PCM_WB_BUF_SIZE */
    srcdst = 1;/* 0-None, 1-Near end, 2-Far end, 3-Both ends */
    priority = 1;/* 0-Do not combine(override), 1-Combine */
    dest = 1;/* 0-Near codec, 1-Near Vocoder */

    memset(kvpair, 0x00, sizeof(kvpair));
    sprintf(kvpair, "%s=%d;%s=%d;%s=%d;%s=%d;%s=%d", VCM_CONFIG_DIRECTION, direction,
            VCM_CONFIG_TYPE, type, VCM_CONFIG_SRC_DST, srcdst,
            VCM_CONFIG_PRIORITY, priority, VCM_CONFIG_DEST, dest);

    mbtk_audio_log("%s: config information kvpair is %s.\n", __FUNCTION__, kvpair);

    //extract the parameter and config from string
    param = str_parms_create_str(kvpair);
    if (!param) {
        printf("%s: param create str is null!", __FUNCTION__);
        return -1;
    }

    //set vcm configurations
    key = VCM_CONFIG_DIRECTION;
    if (str_parms_get_int(param, key, &data[0]) == 0) {
        update_vcm = true;
        str_parms_del(param, key);
    }
    key = VCM_CONFIG_TYPE;
    if (str_parms_get_int(param, key, &data[1]) == 0) {
        update_vcm = true;
        str_parms_del(param, key);
    }
    key = VCM_CONFIG_SRC_DST;
    if (str_parms_get_int(param, key, &data[2]) == 0) {
        update_vcm = true;
        str_parms_del(param, key);
    }
    key = VCM_CONFIG_PRIORITY;
    if (str_parms_get_int(param, key, &data[3]) == 0) {
        update_vcm = true;
        str_parms_del(param, key);
    }
    key = VCM_CONFIG_DEST;
    if (str_parms_get_int(param, key, &data[4]) == 0) {
        update_vcm = true;
        str_parms_del(param, key);
    }

    //printf("Direction is %d, Type is %d, Src_Dst is %d, Priority is %d, Dest is %d. \n",data[0], data[1], data[2], data[3], data[4]);

    if (update_vcm) {
        configure_vcm(data);   /*TODO check if all inputs got all values successfully*/
    }

    return 0;
}

void mbtk_audio_set_status(void* hdl, mbtk_audio_state_enum _status)
{
    struct mopen_audio_t *pcxt = (struct mopen_audio_t *)hdl;
    if (NULL == hdl || NULL == internal_hdl)
        return 0;
    pthread_mutex_lock(&pcxt->_cond_mutex);
    pcxt->state = _status;
    pthread_mutex_unlock(&pcxt->_cond_mutex);
}

static void* mbtk_record_pthread(void* hdl)
{
    struct mopen_audio_t *pcxt = (struct mopen_audio_t *)hdl;
    struct record_cb_s *_usrData = (struct record_cb_s *)pcxt->usrData;
    unsigned bufsize = 0;
    char *data = NULL;
    int len;

    if (NULL == hdl)
        return NULL;

    bufsize = pcxt->pcm_packet_size;
    data = calloc(1, bufsize);
    if (!data) {
        fprintf(stderr, "\n%s:could not allocate %d bytes\n", __FUNCTION__, bufsize);
        return NULL;
    }

    mbtk_audio_set_status(hdl, AUDIO_RUNNING);

    while (pcxt->state != AUDIO_STOP)
    {
        len = pcxt->stream_in->read(pcxt->stream_in, data, bufsize);
        if (len < 0) {
            printf("%s: error reading!\n", __FUNCTION__);
            break;
        }
        if ((bufsize > 0) && (NULL != _usrData->_cb))
        {
            _usrData->_cb(2, data, bufsize);
        }
    }
    pcxt->pid = 0;
    if(pcxt->usrData)
    {
        free(pcxt->usrData);
        pcxt->usrData = NULL;
    }
    free(data);
    mbtk_audio_log("pcm pthread end-\n");
    return NULL;
}

static void* mbtk_play_pthread(void* hdl)
{
    struct mopen_audio_t *pcxt = (struct mopen_audio_t *)hdl;
    _play_callback audio_play_cb = (_play_callback)pcxt->usrData;
    unsigned bufsize = 0;
    char *data = NULL;
    int first_set = 0;
    int ret = 0;
    int rc;

    pthread_detach(pthread_self());
    if (NULL == hdl)
        return NULL;

    bufsize = pcxt->pcm_packet_size;
    data = calloc(1, bufsize);
    if (!data) {
        fprintf(stderr, "\n%s:could not allocate %d bytes\n",__FUNCTION__,bufsize);
        pthread_exit(NULL);
    }

    while (pcxt->state != AUDIO_STOP && 0 != pcxt->pipe_data)
    {
        ret = read(pcxt->fd[0], data, bufsize);
        // printf("%s:read : %d bytes\n", __FUNCTION__, ret);
        if(ret == 0) {
            mbtk_audio_log("%s %d [%d]", __FUNCTION__, __LINE__, ret);
            continue;
        }
        if(ret < 0) {
            mbtk_audio_log("%s %d [%d]", __FUNCTION__, __LINE__, ret);
            break;
        }
        if ((0 == first_set || AUDIO_RESUME == pcxt->state))
        {
            first_set = 1;
            mbtk_audio_set_status(hdl, AUDIO_RUNNING);
        }

        pthread_mutex_lock(&pcxt->_stream_mutex);
        pcxt->pipe_data -= ret;
        pthread_mutex_unlock(&pcxt->_stream_mutex);
        if(pcxt->pipe_data < 0)
            pcxt->pipe_data = 0;
        if(ret < pcxt->pcm_packet_size)
            printf("pcm %d - %d\n", pcxt->pipe_data, ret);

        rc = pcxt->stream_out->write(pcxt->stream_out, data, ret);
        if (rc < 0) {
            printf("%s: error writing (child).\n", __FUNCTION__);
            break;
        } else if (rc < (signed int)pcxt->pcm_packet_size) {
            printf("%s: wrote less than buffer size, rc=%d.\n", __FUNCTION__, rc);
            break;
        }
    }

    if (pcxt->fd[0] != 0 && pcxt->fd[1] != 0)
    {
        close(pcxt->fd[0]);
        close(pcxt->fd[1]);
        pcxt->fd[0] = 0;
        pcxt->fd[1] = 0;
        /* printf("close pcxt->fd!\n"); */
    }
    if (audio_play_cb)
        audio_play_cb(pcxt, 5);
    pcxt->pid = 0;
//    mbtk_audio_set_status(hdl, AUDIO_STOP);
    mbtk_audio_set_status(hdl, AUDIO_OPEN);
    free(data);
    mbtk_audio_log("\n%s:exit!\n", __FUNCTION__);
    pthread_exit(NULL);

    return NULL;
}

static int audio_init_play_pthread(void* hdl)
{
    struct mopen_audio_t *pcxt = (struct mopen_audio_t *)hdl;
    _play_callback audio_play_cb = (_play_callback)pcxt->usrData;
    int ret;

    if (pcxt->fd[0] == 0 && pcxt->fd[1] == 0) {
        if(pipe(pcxt->fd) == 0) {

            pcxt->pipe_data = 0;
            fcntl(pcxt->fd[0], F_SETFL, O_NONBLOCK);
            fcntl(pcxt->fd[1], F_SETFL, O_NONBLOCK);
        } else {
            fprintf(stderr, "\n%d: create pipe error\n", __LINE__);
            return -1;
        }
    }
    if (pcxt->pid == 0) {
        if (audio_play_cb)
            audio_play_cb(pcxt, 0);
        mbtk_audio_set_status(pcxt, AUDIO_RUNNING);
        ret = pthread_create(&pcxt->pid, NULL, mbtk_play_pthread, hdl);
        if (ret != 0)
        {
            fprintf(stderr, "\n%s: Failed create pthread\n",__FUNCTION__);
            return ret;
        }
    }

    return 0;
}

int  mbtk_audio_play_wait_end(void* hdl)
{
    struct mopen_audio_t *pcxt = (struct mopen_audio_t *)hdl;

    if (NULL == hdl)
    {
        fprintf(stderr, "\n%s: intput invalid params\n",__FUNCTION__);
        return -1;
    }

    if(pcxt->pid != 0)
    {
        do{
            usleep(10000);
        }
        while(pcxt->state != AUDIO_STOP);
        pcxt->pid = 0;
    }

    return 0;
}

static int audio_open_pcm(void *dev_hdl, int num_channels, int rate, int in_out)
{
    struct mopen_audio_t *pcxt = (struct mopen_audio_t *)dev_hdl;
    int nb_wb;

    //Support 8k/16k & mono wave file
    if (((rate != 8000) && (rate != 16000))
            || (num_channels != 1) ) {
        printf("%s: error wave file:rate = %d, num_channels = %d!! \n",
                __FUNCTION__,rate, num_channels);
        return -1;
    }

    printf("%s: success open, rate = %d, num_channels = %d.\n",
            __FUNCTION__, rate, num_channels);

    if ((8000 == rate) && (1 == num_channels)) {
        nb_wb = 0;//NB
        pcxt->pcm_packet_size = PCM_NB_BUF_SIZE;
    } else if ((16000 == rate) && (1 == num_channels)) {
        nb_wb = 1;//WB
        pcxt->pcm_packet_size = PCM_WB_BUF_SIZE;
    }

    //config playback parameters.
    config_parameters(in_out, nb_wb);
    pcxt->device = in_out;
    return 0;
}

mbtk_audio_handle mbtk_audio_open(mbtk_audio_dev_enum dev, int flag, int rate, void *usrData)
{
    int value = 1;
    struct mopen_audio_t *aud_hdl = NULL;
    int ret;

    // if (dev <= AUDIO_NULL || dev >= AUDIO_MAX)
    // {
    //     printf("invaild PCM dev\n");
    //     return NULL;
    // }
    if(internal_hdl)
    {
        printf("Audio device inited\n");
        return internal_hdl;
    }
    aud_hdl = (struct mopen_audio_t *) calloc(1, sizeof(struct mopen_audio_t));
    if (!aud_hdl)
    {
        fprintf(stderr, "\n%s:Failed to allocate audio hdl!, errno=%d\n", __FUNCTION__, errno);
        return NULL;
    }
    memset(aud_hdl, 0, sizeof(struct mopen_audio_t));

    //init global variables
    aud_hdl->audio_ahw_dev_ubus = audio_hal_install();
    if (aud_hdl->audio_ahw_dev_ubus == NULL) {
        printf("%s: audio_hal_install failed!\n", __FUNCTION__);
        goto error;
    }

    if(1 == dev)
    {
        //send the command of "AUDIOSTUB_PCMCTL" and "AUDIOSTUB_DTMFDETECTIONCTL" to simulate telephone offhook.
            // ASR Question #80497  Using it causes the recording to crash
    //    simulateOffhook(aud_hdl, 1);
        //config playback parameters.
        config_parameters(0, 0);
    }
    ret = audio_open_pcm(aud_hdl, flag, rate, dev);
    if (ret)
    {
        printf("\n%s: pcm open error, errno=%d\n", __FUNCTION__, errno);
        goto error;
    }
    if(1 == dev)
    {
        //open the audiostub_ctl, prepare for record and playback
        VCMInit();
        //open record stream
        ret = aud_hdl->audio_ahw_dev_ubus->open_input_stream(aud_hdl->audio_ahw_dev_ubus, 0,
                aud_hdl->audio_ahw_dev_ubus->get_supported_devices(aud_hdl->audio_ahw_dev_ubus),
                NULL, &aud_hdl->stream_in, 0, 0, AUDIO_SOURCE_VOICE_CALL);
    }
    else
    {
        ret = aud_hdl->audio_ahw_dev_ubus->open_output_stream(aud_hdl->audio_ahw_dev_ubus, 0,
                aud_hdl->audio_ahw_dev_ubus->get_supported_devices(aud_hdl->audio_ahw_dev_ubus),
                AUDIO_OUTPUT_FLAG_DIRECT, NULL, &aud_hdl->stream_out, 0);
    }

    if (ret < 0) {
        printf("%s: error opening output device. rc = %d\n", __FUNCTION__, ret);
        goto error;
    }
    pthread_mutex_init(&aud_hdl->_cond_mutex, NULL);
    pthread_mutex_init(&aud_hdl->_stream_mutex, NULL);
    aud_hdl->usrData = usrData;
    aud_hdl->state = AUDIO_OPEN;
    /* printf("Mbtk_Audio_Open aud_hdl[%x][%x][%x]\n", aud_hdl, aud_hdl->_mixer_ctl, aud_hdl->_pcm); */
    internal_hdl = aud_hdl;

    return (void *)aud_hdl;

error:
    value = 0;
    free(aud_hdl);
    return NULL;
}


int mbtk_audio_play_stream_old(void *dev_hdl, const void *pData, int len)
{
    struct mopen_audio_t *pcxt = (struct mopen_audio_t *)dev_hdl;

    if (NULL == pcxt || NULL == internal_hdl)
        return -1;

    if (len > 1024) {
        printf("audio play stream max size ( < 1024): %d\n", len);
        return -2;
    }

    if (pcxt->state == AUDIO_STOP) {
        return 0;
	}
    audio_init_play_pthread(pcxt);

    pthread_mutex_lock(&pcxt->_stream_mutex);
    pcxt->pipe_data += len;
    pthread_mutex_unlock(&pcxt->_stream_mutex);
    while(pcxt->state != AUDIO_STOP && (pcxt->pipe_data > 40960 || pcxt->fd[1] < 0 || pcxt->fd[1] == 0)) {
        // printf("%s:wait %d %d\n", __FUNCTION__, pcxt->pipe_data, pcxt->fd[1]);
        usleep(50000);
    }

    if(pcxt->fd[1] > 0) {
        if (len != write(pcxt->fd[1], pData, len)) {
            fprintf(stderr, "\n%s: pcm_write failed [%d %d]\n", __FUNCTION__, pcxt->fd[1], errno);
            return -errno;
        }
    }

    return 0;
}

int mbtk_audio_play_stream(void *dev_hdl, const void *pData, int len)
{
//    printf("%s,--len:%d\n", __func__, len);
    unsigned bufsize = 0;
    char *data = NULL;
    int first_set = 0;
    int res = 0;
    int ret = 0;
    int read_size = 0;
    char *p = (char *)pData;

    struct mopen_audio_t *pcxt = (struct mopen_audio_t *)dev_hdl;

    if (NULL == dev_hdl || NULL == internal_hdl || pData == NULL)
        return -1;

    if(AUDIO_RUNNING == pcxt->state)
        return -2;

    bufsize = pcxt->pcm_packet_size;
    data = calloc(1, bufsize);
    if (!data) {
        fprintf(stderr, "\n%s:could not allocate %d bytes\n",__FUNCTION__,bufsize);
        pthread_exit(NULL);
    }

    mbtk_audio_set_status(dev_hdl, AUDIO_RUNNING);
//    if(bufsize > len )
//    {
//        bufsize = len;
//    }
    
    while (pcxt->state != AUDIO_STOP)
    {

        memcpy(data,p+read_size, bufsize );
        read_size += bufsize;

        if(read_size > len)
        {
         //    printf(">[%d]\n", read_size); 
            break;
        }

        while(AUDIO_PAUSE == pcxt->state)
        {
            usleep(80000);
        }

        if ((0 == first_set || AUDIO_RESUME == pcxt->state))
        {
            first_set = 1;
            mbtk_audio_set_status(dev_hdl, AUDIO_RUNNING);
        }

        ret = pcxt->stream_out->write(pcxt->stream_out, data, bufsize);
        if (ret < 0) {
            printf("%s: error writing (child).\n", __FUNCTION__);
            break;
        } else if (ret < (signed int)pcxt->pcm_packet_size) {
            printf("%s: wrote less than buffer size, rc=%d.\n", __FUNCTION__, ret);
            break;
        }

        if(read_size == len)
        {
         //    printf("=[%d]", read_size); 
            break;
        }

    }

    mbtk_audio_set_status(dev_hdl, AUDIO_OPEN);
    free(data);
    return 0;

}


int mbtk_audio_play_file(void *dev_hdl, int file_fd, int offset)
{
    unsigned bufsize = 0;
    char *data = NULL;
    int first_set = 0;
    int file_data_sz = 0;
    int res = 0;
    int ret;

    struct mopen_audio_t *pcxt = (struct mopen_audio_t *)dev_hdl;

    if (NULL == dev_hdl || NULL == internal_hdl)
        return -1;

    if(AUDIO_RUNNING == pcxt->state)
        return -2;

    file_data_sz = mbtk_wav_pcm16Le_check(file_fd);

    bufsize = pcxt->pcm_packet_size;
    data = calloc(1, bufsize);
    if (!data) {
        fprintf(stderr, "\n%s:could not allocate %d bytes\n",__FUNCTION__,bufsize);
        pthread_exit(NULL);
    }
    if(offset)
    {
        lseek(file_fd, offset, SEEK_SET);
    }

    mbtk_audio_set_status(dev_hdl, AUDIO_RUNNING);
    int all_size = 0;
    
    while (pcxt->state != AUDIO_STOP)
    {
        res = read(file_fd, data, bufsize);
      //   printf("%s:read : %d bytes\n", __FUNCTION__, res);
        if(res == 0 || res < 0)
        {
         //    printf("[%d]", res); 
            break;
        }

        all_size += res;
        if (file_data_sz < all_size || file_data_sz == all_size) {
            printf("aplay size :%d - %d\n", file_data_sz, all_size);
            break;
        }

        while(AUDIO_PAUSE == pcxt->state)
        {
            usleep(80000);
        }

        if ((0 == first_set || AUDIO_RESUME == pcxt->state))
        {
            first_set = 1;
            mbtk_audio_set_status(dev_hdl, AUDIO_RUNNING);
        }

        ret = pcxt->stream_out->write(pcxt->stream_out, data, res);
        if (ret < 0) {
            printf("%s: error writing (child).\n", __FUNCTION__);
            break;
        } else if (ret < (signed int)pcxt->pcm_packet_size) {
            printf("%s: wrote less than buffer size, rc=%d.\n", __FUNCTION__, ret);
            break;
        }
    }

    mbtk_audio_set_status(dev_hdl, AUDIO_OPEN);
    free(data);

    return 0;
}

int mbtk_audio_record(void *dev_hdl, mbtk_audio_record_cb_func cb_func, void *cb_data)
{
    struct mopen_audio_t *pcxt = (struct mopen_audio_t *)dev_hdl;
    int res = -1;
    struct record_cb_s *_usrData = NULL;

    if (NULL == pcxt || NULL == internal_hdl || NULL == cb_func)
        return -1;

    if(AUDIO_RUNNING == pcxt->state)
        return -2;

    _usrData = malloc(sizeof(struct record_cb_s));
    _usrData->_cb = cb_func;
    _usrData->cb_data = cb_data;
    pcxt->usrData = (void *)_usrData;
    res = pthread_create(&pcxt->pid, NULL, mbtk_record_pthread, dev_hdl);
    if (res != 0)
    {
        if(pcxt->usrData)
        {
            free(pcxt->usrData);
            pcxt->usrData = NULL;
        }
        fprintf(stderr, "\n%s: Failed to create pthread\n", __FUNCTION__);
    }
    // 防止重复录音
    usleep(500);

    return res;
}

int mbtk_audio_close(void *dev_hdl)
{
    printf("mbtk_audio_close()\n");
    int value = 0;
    struct mopen_audio_t *_hdl = (struct mopen_audio_t *)dev_hdl;

    if (NULL == _hdl || NULL == internal_hdl )
    {
        printf("mbtk_audio_close() fail dev_hdl is NULL\n");
        return -1;
    }

    mbtk_audio_set_status(_hdl, AUDIO_STOP);
    if(0 == _hdl->device) {
        while (_hdl->pid != 0) {
            usleep(10000);
        }

        vcm_playback_drain(0);//wait for drain the AP audiostub queue.
        usleep(80000);//delay 80ms until DSP play out its buffered data.
        _hdl->stream_out->common.standby(&_hdl->stream_out->common);
        _hdl->audio_ahw_dev_ubus->close_output_stream(_hdl->audio_ahw_dev_ubus, _hdl->stream_out);
    } else {

        while (_hdl->pid != 0) {
            sleep(1);
        }
        _hdl->stream_in->common.standby(&_hdl->stream_in->common);
        _hdl->audio_ahw_dev_ubus->close_input_stream(_hdl->audio_ahw_dev_ubus, _hdl->stream_in);
        VCMDeinit();//close the fd of audiostub_ctl when exit the thread.
    }

    audio_hal_uninstall();
    pthread_mutex_destroy(&_hdl->_cond_mutex);
    pthread_mutex_destroy(&_hdl->_stream_mutex);
    free(_hdl);
    _hdl = NULL;
    internal_hdl = NULL;

    return 0;
}

int mbtk_audio_pause(void* dev_hdl)
{
    // struct pcm *_pcm = ((struct mopen_audio_t *)dev_hdl)->_pcm;

    if (NULL == dev_hdl || NULL == internal_hdl)
        return -1;

    if (((struct mopen_audio_t *)dev_hdl)->state != AUDIO_RUNNING)
    {
        return -1;
    }

    // if (ioctl(_pcm->fd, SNDRV_PCM_IOCTL_PAUSE, 1))
    // {
    //     printf("\n%s: cannot pause channel: errno =%d\n",__FUNCTION__,-errno);
    //     return -errno;
    // }
    mbtk_audio_set_status(dev_hdl, AUDIO_PAUSE);
    return 0;
}

int mbtk_audio_resume(void* dev_hdl)
{
    if (NULL == dev_hdl || NULL == internal_hdl)
        return -1;

    if (((struct mopen_audio_t *)dev_hdl)->state != AUDIO_PAUSE)
    {
        return -1;
    }

    // if (ioctl(_pcm->fd, SNDRV_PCM_IOCTL_PAUSE, 0))
    // {
    //     printf("\n%s: cannot Resume channel: errno =%d\n", __FUNCTION__, -errno);
    //     return -errno;
    // }
    mbtk_audio_set_status(dev_hdl, AUDIO_RESUME);
    return 0;
}

int mbtk_audio_stop(void* dev_hdl)
{
    struct mopen_audio_t *_hdl = (struct mopen_audio_t *)dev_hdl;

    if (NULL == dev_hdl || NULL == internal_hdl)
        return -1;

    // if (ioctl(_hdl->_pcm->fd, SNDRV_PCM_IOCTL_DROP))
    // {
    //     printf("\n%s: cannot Resume channel: errno =%d\n",__FUNCTION__,-errno);
    //     return -errno;
    // }

    mbtk_audio_set_status(dev_hdl, AUDIO_STOP);
    _hdl->pid = 0;

    return 0;
}

mbtk_audio_state_enum mbtk_audio_state_get(void *hdl)
{
    return ((struct mopen_audio_t *)hdl)->state;
}