490 static esp_err_t i2s_delete_dma_buffer(i2s_port_t i2s_num, i2s_dma_t *dma_obj)  in i2s_delete_dma_buffer()  argument
492     ESP_RETURN_ON_FALSE(dma_obj, ESP_ERR_INVALID_ARG, TAG, "I2S DMA object can't be NULL");  in i2s_delete_dma_buffer()
496         if (dma_obj->desc && dma_obj->desc[cnt]) {  in i2s_delete_dma_buffer()
497             free(dma_obj->desc[cnt]);  in i2s_delete_dma_buffer()
498             dma_obj->desc[cnt] = NULL;  in i2s_delete_dma_buffer()
500         if (dma_obj->buf && dma_obj->buf[cnt]) {  in i2s_delete_dma_buffer()
501             free(dma_obj->buf[cnt]);  in i2s_delete_dma_buffer()
502             dma_obj->buf[cnt] = NULL;  in i2s_delete_dma_buffer()
508 static esp_err_t i2s_alloc_dma_buffer(i2s_port_t i2s_num, i2s_dma_t *dma_obj)  in i2s_alloc_dma_buffer()  argument
511     ESP_GOTO_ON_FALSE(dma_obj, ESP_ERR_INVALID_ARG, err, TAG, "I2S DMA object can't be NULL");  in i2s_alloc_dma_buffer()
516 …    dma_obj->buf[cnt] = (char *) heap_caps_calloc(dma_obj->buf_size, sizeof(char), MALLOC_CAP_DMA);  in i2s_alloc_dma_buffer()
517         ESP_GOTO_ON_FALSE(dma_obj->buf[cnt], ESP_ERR_NO_MEM, err, TAG, "Error malloc dma buffer");  in i2s_alloc_dma_buffer()
519         memset(dma_obj->buf[cnt], 0, dma_obj->buf_size);  in i2s_alloc_dma_buffer()
522         dma_obj->desc[cnt] = (lldesc_t *) heap_caps_calloc(1, sizeof(lldesc_t), MALLOC_CAP_DMA);  in i2s_alloc_dma_buffer()
523 …ESP_GOTO_ON_FALSE(dma_obj->desc[cnt], ESP_ERR_NO_MEM, err, TAG,  "Error malloc dma description ent…  in i2s_alloc_dma_buffer()
528         dma_obj->desc[cnt]->owner = 1;  in i2s_alloc_dma_buffer()
529         dma_obj->desc[cnt]->eof = 1;  in i2s_alloc_dma_buffer()
530         dma_obj->desc[cnt]->sosf = 0;  in i2s_alloc_dma_buffer()
531         dma_obj->desc[cnt]->length = dma_obj->buf_size;  in i2s_alloc_dma_buffer()
532         dma_obj->desc[cnt]->size = dma_obj->buf_size;  in i2s_alloc_dma_buffer()
533         dma_obj->desc[cnt]->buf = (uint8_t *) dma_obj->buf[cnt];  in i2s_alloc_dma_buffer()
534         dma_obj->desc[cnt]->offset = 0;  in i2s_alloc_dma_buffer()
536 …dma_obj->desc[cnt]->empty = (uint32_t)((cnt < (buf_cnt - 1)) ? (dma_obj->desc[cnt + 1]) : dma_obj-…  in i2s_alloc_dma_buffer()
539         i2s_ll_rx_set_eof_num(p_i2s[i2s_num]->hal.dev, dma_obj->buf_size);  in i2s_alloc_dma_buffer()
541 …ESP_LOGD(TAG, "DMA Malloc info, datalen=blocksize=%d, dma_desc_num=%"PRIu32, dma_obj->buf_size, bu…  in i2s_alloc_dma_buffer()
545     i2s_delete_dma_buffer(i2s_num, dma_obj);  in i2s_alloc_dma_buffer()
549 static esp_err_t i2s_realloc_dma_buffer(i2s_port_t i2s_num, i2s_dma_t *dma_obj)  in i2s_realloc_dma_buffer()  argument
551     ESP_RETURN_ON_FALSE(dma_obj, ESP_ERR_INVALID_ARG, TAG, "I2S DMA object can't be NULL");  in i2s_realloc_dma_buffer()
554     i2s_delete_dma_buffer(i2s_num, dma_obj);  in i2s_realloc_dma_buffer()
556 … ESP_RETURN_ON_ERROR(i2s_alloc_dma_buffer(i2s_num, dma_obj), TAG, "Failed to allocate dma buffer");  in i2s_realloc_dma_buffer()