Function _audio_dev_init

components/drivers/audio/dev_audio.c:286–362

* @brief Init audio pipe * * In kernel, this function will set replay or record function depending on device * flag. For replaying, it will malloc for managing audio replay struct meanwhile * creating mempool and dataqueue.For recording, it will creat audio pipe and * it's ringbuffer. * In driver, this function will only execute hardware driver initialization code * and get hardware buffer

 * @return error code, RT_EOK is successful otherwise means failure
 */
static rt_err_t _audio_dev_init(struct rt_device *dev)
{
    rt_err_t result = RT_EOK;
    struct rt_audio_device *audio;

    RT_ASSERT(dev != RT_NULL);
    audio = (struct rt_audio_device *) dev;

    /* initialize replay & record */
    audio->replay = RT_NULL;
    audio->record = RT_NULL;

    /* initialize replay */
    if (dev->flag & RT_DEVICE_FLAG_WRONLY)
    {
        struct rt_audio_replay *replay = (struct rt_audio_replay *) rt_malloc(sizeof(struct rt_audio_replay));

        if (replay == RT_NULL)
            return -RT_ENOMEM;
        rt_memset(replay, 0, sizeof(struct rt_audio_replay));

        /* init memory pool for replay */
        replay->mp = rt_mp_create("adu_mp", RT_AUDIO_REPLAY_MP_BLOCK_COUNT, RT_AUDIO_REPLAY_MP_BLOCK_SIZE);
        if (replay->mp == RT_NULL)
        {
            rt_free(replay);
            LOG_E("create memory pool for replay failed");
            return -RT_ENOMEM;
        }

        /* init queue for audio replay */
        rt_data_queue_init(&replay->queue, CFG_AUDIO_REPLAY_QUEUE_COUNT, 0, RT_NULL);

        /* init mutex lock for audio replay */
        rt_mutex_init(&replay->lock, "replay", RT_IPC_FLAG_PRIO);

        replay->activated = RT_FALSE;
        audio->replay = replay;
    }

    /* initialize record */
    if (dev->flag & RT_DEVICE_FLAG_RDONLY)
    {
        struct rt_audio_record *record = (struct rt_audio_record *) rt_malloc(sizeof(struct rt_audio_record));
        rt_uint8_t *buffer;

        if (record == RT_NULL)
            return -RT_ENOMEM;
        rt_memset(record, 0, sizeof(struct rt_audio_record));

        /* init pipe for record*/
        buffer = rt_malloc(RT_AUDIO_RECORD_PIPE_SIZE);
        if (buffer == RT_NULL)
        {
            rt_free(record);
            LOG_E("malloc memory for for record pipe failed");
            return -RT_ENOMEM;
        }