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Diffstat (limited to 'examples/device/mtp/src/mtp_fs_example.c')
| -rw-r--r-- | examples/device/mtp/src/mtp_fs_example.c | 624 |
1 files changed, 624 insertions, 0 deletions
diff --git a/examples/device/mtp/src/mtp_fs_example.c b/examples/device/mtp/src/mtp_fs_example.c new file mode 100644 index 000000000..b4772f146 --- /dev/null +++ b/examples/device/mtp/src/mtp_fs_example.c @@ -0,0 +1,624 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2025 Ennebi Elettronica (https://ennebielettronica.com) + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + */ + +#include "bsp/board_api.h" +#include "tusb.h" + +#include "tinyusb_logo_png.h" + +//--------------------------------------------------------------------+ +// Dataset +//--------------------------------------------------------------------+ + +//------------- device info -------------// +#define DEV_INFO_MANUFACTURER "TinyUSB" +#define DEV_INFO_MODEL "MTP Example" +#define DEV_INFO_VERSION "1.0" +#define DEV_PROP_FRIENDLY_NAME "TinyUSB MTP" + +//------------- storage info -------------// +#define STORAGE_DESCRIPTRION { 'd', 'i', 's', 'k', 0 } +#define VOLUME_IDENTIFIER { 'v', 'o', 'l', 0 } + +typedef MTP_STORAGE_INFO_STRUCT(TU_ARRAY_SIZE((uint16_t[]) STORAGE_DESCRIPTRION), + TU_ARRAY_SIZE(((uint16_t[])VOLUME_IDENTIFIER)) +) storage_info_t; + +storage_info_t storage_info = { + #ifdef CFG_EXAMPLE_MTP_READONLY + .storage_type = MTP_STORAGE_TYPE_FIXED_ROM, + #else + .storage_type = MTP_STORAGE_TYPE_FIXED_RAM, + #endif + + .filesystem_type = MTP_FILESYSTEM_TYPE_GENERIC_HIERARCHICAL, + .access_capability = MTP_ACCESS_CAPABILITY_READ_WRITE, + .max_capacity_in_bytes = 0, // calculated at runtime + .free_space_in_bytes = 0, // calculated at runtime + .free_space_in_objects = 0, // calculated at runtime + .storage_description = { + .count = (TU_FIELD_SIZE(storage_info_t, storage_description)-1) / sizeof(uint16_t), + .utf16 = STORAGE_DESCRIPTRION + }, + .volume_identifier = { + .count = (TU_FIELD_SIZE(storage_info_t, volume_identifier)-1) / sizeof(uint16_t), + .utf16 = VOLUME_IDENTIFIER + } +}; + +//--------------------------------------------------------------------+ +// MTP FILESYSTEM +//--------------------------------------------------------------------+ +// only allow to add 1 more object to make it simpler to manage memory +#define FS_MAX_FILE_COUNT 3UL +#define FS_MAX_FILENAME_LEN 16 + +#ifdef CFG_EXAMPLE_MTP_READONLY + #define FS_MAX_CAPACITY_BYTES 0 +#else + #define FS_MAX_CAPACITY_BYTES (4 * 1024UL) + + // object data buffer (excluding 2 predefined files) with simple allocation pointer + uint8_t fs_buf[FS_MAX_CAPACITY_BYTES]; +#endif + +#define FS_FIXED_DATETIME "20250808T173500.0" // "YYYYMMDDTHHMMSS.s" +#define README_TXT_CONTENT "TinyUSB MTP Filesystem example" + +typedef struct { + uint16_t name[FS_MAX_FILENAME_LEN]; + uint16_t object_format; + uint16_t protection_status; + uint32_t image_pix_width; + uint32_t image_pix_height; + uint32_t image_bit_depth; + uint32_t parent; + uint16_t association_type; + uint32_t size; + uint8_t* data; +} fs_file_t; + +// Files system, handle is index + 1 +static fs_file_t fs_objects[FS_MAX_FILE_COUNT] = { + { + .name = { 'r', 'e', 'a', 'd', 'm', 'e', '.', 't', 'x', 't', 0 }, // readme.txt + .object_format = MTP_OBJ_FORMAT_TEXT, + .protection_status = MTP_PROTECTION_STATUS_READ_ONLY, + .image_pix_width = 0, + .image_pix_height = 0, + .image_bit_depth = 0, + .parent = 0, + .association_type = MTP_ASSOCIATION_UNDEFINED, + .size = sizeof(README_TXT_CONTENT)-1, + .data = (uint8_t*) (uintptr_t) README_TXT_CONTENT, + }, + { + .name = { 't', 'i', 'n', 'y', 'u', 's', 'b', '.', 'p', 'n', 'g', 0 }, // "tinyusb.png" + .object_format = MTP_OBJ_FORMAT_PNG, + .protection_status = MTP_PROTECTION_STATUS_READ_ONLY, + .image_pix_width = 128, + .image_pix_height = 64, + .image_bit_depth = 32, + .parent = 0, + .association_type = MTP_ASSOCIATION_UNDEFINED, + .size = LOGO_LEN, + .data = (uint8_t*) (uintptr_t) logo_bin + } +}; + +enum { + SUPPORTED_STORAGE_ID = 0x00010001u // physical = 1, logical = 1 +}; + +static int32_t fs_get_device_info(tud_mtp_cb_data_t* cb_data); +static int32_t fs_open_close_session(tud_mtp_cb_data_t* cb_data); +static int32_t fs_get_storage_ids(tud_mtp_cb_data_t* cb_data); +static int32_t fs_get_storage_info(tud_mtp_cb_data_t* cb_data); +static int32_t fs_get_device_properties(tud_mtp_cb_data_t* cb_data); +static int32_t fs_get_object_handles(tud_mtp_cb_data_t* cb_data); +static int32_t fs_get_object_info(tud_mtp_cb_data_t* cb_data); +static int32_t fs_get_object(tud_mtp_cb_data_t* cb_data); +static int32_t fs_delete_object(tud_mtp_cb_data_t* cb_data); +static int32_t fs_send_object_info(tud_mtp_cb_data_t* cb_data); +static int32_t fs_send_object(tud_mtp_cb_data_t* cb_data); + +typedef int32_t (*fs_op_handler_t)(tud_mtp_cb_data_t* cb_data); +typedef struct { + uint32_t op_code; + fs_op_handler_t handler; +}fs_op_handler_dict_t; + +fs_op_handler_dict_t fs_op_handler_dict[] = { + { MTP_OP_GET_DEVICE_INFO, fs_get_device_info }, + { MTP_OP_OPEN_SESSION, fs_open_close_session }, + { MTP_OP_CLOSE_SESSION, fs_open_close_session }, + { MTP_OP_GET_STORAGE_IDS, fs_get_storage_ids }, + { MTP_OP_GET_STORAGE_INFO, fs_get_storage_info }, + { MTP_OP_GET_DEVICE_PROP_DESC, fs_get_device_properties }, + { MTP_OP_GET_DEVICE_PROP_VALUE, fs_get_device_properties }, + { MTP_OP_GET_OBJECT_HANDLES, fs_get_object_handles }, + { MTP_OP_GET_OBJECT_INFO, fs_get_object_info }, + { MTP_OP_GET_OBJECT, fs_get_object }, + { MTP_OP_DELETE_OBJECT, fs_delete_object }, + { MTP_OP_SEND_OBJECT_INFO, fs_send_object_info }, + { MTP_OP_SEND_OBJECT, fs_send_object }, +}; + +static bool is_session_opened = false; +static uint32_t send_obj_handle = 0; + +//--------------------------------------------------------------------+ +// +//--------------------------------------------------------------------+ +// Get pointer to object info from handle +static inline fs_file_t* fs_get_file(uint32_t handle) { + if (handle == 0 || handle > FS_MAX_FILE_COUNT) { + return NULL; + } + return &fs_objects[handle-1]; +} + +static inline bool fs_file_exist(fs_file_t* f) { + return f->name[0] != 0; +} + +// Get the number of allocated nodes in filesystem +static uint32_t fs_get_file_count(void) { + uint32_t count = 0; + for (size_t i = 0; i < FS_MAX_FILE_COUNT; i++) { + if (fs_file_exist(&fs_objects[i])) { + count++; + } + } + return count; +} + +static inline fs_file_t* fs_create_file(void) { + for (size_t i = 0; i < FS_MAX_FILE_COUNT; i++) { + fs_file_t* f = &fs_objects[i]; + if (!fs_file_exist(f)) { + send_obj_handle = i + 1; + return f; + } + } + return NULL; +} + +// simple malloc +static inline uint8_t* fs_malloc(size_t size) { +#ifdef CFG_EXAMPLE_MTP_READONLY + (void) size; + return NULL; +#else + if (size > FS_MAX_CAPACITY_BYTES) { + return NULL; + } + return fs_buf; +#endif +} + +//--------------------------------------------------------------------+ +// Control Request callback +//--------------------------------------------------------------------+ +bool tud_mtp_request_cancel_cb(tud_mtp_request_cb_data_t* cb_data) { + mtp_request_reset_cancel_data_t cancel_data; + memcpy(&cancel_data, cb_data->buf, sizeof(cancel_data)); + (void) cancel_data.code; + (void ) cancel_data.transaction_id; + return true; +} + +// Invoked when received Device Reset request +// return false to stall the request +bool tud_mtp_request_device_reset_cb(tud_mtp_request_cb_data_t* cb_data) { + (void) cb_data; + return true; +} + +// Invoked when received Get Extended Event request. Application fill callback data's buffer for response +// return negative to stall the request +int32_t tud_mtp_request_get_extended_event_cb(tud_mtp_request_cb_data_t* cb_data) { + (void) cb_data; + return false; // not implemented yet +} + +// Invoked when received Get DeviceStatus request. Application fill callback data's buffer for response +// return negative to stall the request +int32_t tud_mtp_request_get_device_status_cb(tud_mtp_request_cb_data_t* cb_data) { + uint16_t* buf16 = (uint16_t*)(uintptr_t) cb_data->buf; + buf16[0] = 4; // length + buf16[1] = MTP_RESP_OK; // status + return 4; +} + +//--------------------------------------------------------------------+ +// Bulk Only Protocol +//--------------------------------------------------------------------+ +int32_t tud_mtp_command_received_cb(tud_mtp_cb_data_t* cb_data) { + const mtp_container_command_t* command = cb_data->command_container; + mtp_container_info_t* io_container = &cb_data->io_container; + fs_op_handler_t handler = NULL; + for (size_t i = 0; i < TU_ARRAY_SIZE(fs_op_handler_dict); i++) { + if (fs_op_handler_dict[i].op_code == command->header.code) { + handler = fs_op_handler_dict[i].handler; + break; + } + } + + int32_t resp_code; + if (handler == NULL) { + resp_code = MTP_RESP_OPERATION_NOT_SUPPORTED; + } else { + resp_code = handler(cb_data); + if (resp_code > MTP_RESP_UNDEFINED) { + // send response if needed + io_container->header->code = (uint16_t)resp_code; + tud_mtp_response_send(io_container); + } + } + + return resp_code; +} + +int32_t tud_mtp_data_xfer_cb(tud_mtp_cb_data_t* cb_data) { + const mtp_container_command_t* command = cb_data->command_container; + mtp_container_info_t* io_container = &cb_data->io_container; + + fs_op_handler_t handler = NULL; + for (size_t i = 0; i < TU_ARRAY_SIZE(fs_op_handler_dict); i++) { + if (fs_op_handler_dict[i].op_code == command->header.code) { + handler = fs_op_handler_dict[i].handler; + break; + } + } + + int32_t resp_code; + if (handler == NULL) { + resp_code = MTP_RESP_OPERATION_NOT_SUPPORTED; + } else { + resp_code = handler(cb_data); + if (resp_code > MTP_RESP_UNDEFINED) { + // send response if needed + io_container->header->code = (uint16_t)resp_code; + tud_mtp_response_send(io_container); + } + } + + return 0; +} + +int32_t tud_mtp_data_complete_cb(tud_mtp_cb_data_t* cb_data) { + const mtp_container_command_t* command = cb_data->command_container; + mtp_container_info_t* resp = &cb_data->io_container; + switch (command->header.code) { + case MTP_OP_SEND_OBJECT_INFO: { + fs_file_t* f = fs_get_file(send_obj_handle); + if (f == NULL) { + resp->header->code = MTP_RESP_GENERAL_ERROR; + break; + } + // parameter is: storage id, parent handle, new handle + mtp_container_add_uint32(resp, SUPPORTED_STORAGE_ID); + mtp_container_add_uint32(resp, f->parent); + mtp_container_add_uint32(resp, send_obj_handle); + resp->header->code = MTP_RESP_OK; + break; + } + + default: + resp->header->code = (cb_data->xfer_result == XFER_RESULT_SUCCESS) ? MTP_RESP_OK : MTP_RESP_GENERAL_ERROR; + break; + } + + tud_mtp_response_send(resp); + return 0; +} + +int32_t tud_mtp_response_complete_cb(tud_mtp_cb_data_t* cb_data) { + (void) cb_data; + return 0; // nothing to do +} + +//--------------------------------------------------------------------+ +// File System Handlers +//--------------------------------------------------------------------+ +static int32_t fs_get_device_info(tud_mtp_cb_data_t* cb_data) { + // Device info is already prepared up to playback formats. Application only need to add string fields + mtp_container_info_t* io_container = &cb_data->io_container; + mtp_container_add_cstring(io_container, DEV_INFO_MANUFACTURER); + mtp_container_add_cstring(io_container, DEV_INFO_MODEL); + mtp_container_add_cstring(io_container, DEV_INFO_VERSION); + + enum { MAX_SERIAL_NCHARS = 32 }; + uint16_t serial_utf16[MAX_SERIAL_NCHARS+1]; + size_t nchars = board_usb_get_serial(serial_utf16, MAX_SERIAL_NCHARS); + serial_utf16[tu_min32(nchars, MAX_SERIAL_NCHARS)] = 0; // ensure null termination + mtp_container_add_string(io_container, serial_utf16); + + tud_mtp_data_send(io_container); + return 0; +} + +static int32_t fs_open_close_session(tud_mtp_cb_data_t* cb_data) { + const mtp_container_command_t* command = cb_data->command_container; + if (command->header.code == MTP_OP_OPEN_SESSION) { + if (is_session_opened) { + return MTP_RESP_SESSION_ALREADY_OPEN; + } + is_session_opened = true; + } else { // close session + if (!is_session_opened) { + return MTP_RESP_SESSION_NOT_OPEN; + } + is_session_opened = false; + } + return MTP_RESP_OK; +} + +static int32_t fs_get_storage_ids(tud_mtp_cb_data_t* cb_data) { + mtp_container_info_t* io_container = &cb_data->io_container; + uint32_t storage_ids [] = { SUPPORTED_STORAGE_ID }; + mtp_container_add_auint32(io_container, 1, storage_ids); + tud_mtp_data_send(io_container); + return 0; +} + +static int32_t fs_get_storage_info(tud_mtp_cb_data_t* cb_data) { + const mtp_container_command_t* command = cb_data->command_container; + mtp_container_info_t* io_container = &cb_data->io_container; + const uint32_t storage_id = command->params[0]; + TU_VERIFY(SUPPORTED_STORAGE_ID == storage_id, -1); + // update storage info with current free space + storage_info.max_capacity_in_bytes = sizeof(README_TXT_CONTENT) + LOGO_LEN + FS_MAX_CAPACITY_BYTES; + storage_info.free_space_in_objects = FS_MAX_FILE_COUNT - fs_get_file_count(); + storage_info.free_space_in_bytes = storage_info.free_space_in_objects ? FS_MAX_CAPACITY_BYTES : 0; + mtp_container_add_raw(io_container, &storage_info, sizeof(storage_info)); + tud_mtp_data_send(io_container); + return 0; +} + +static int32_t fs_get_device_properties(tud_mtp_cb_data_t* cb_data) { + const mtp_container_command_t* command = cb_data->command_container; + mtp_container_info_t* io_container = &cb_data->io_container; + const uint16_t dev_prop_code = (uint16_t) command->params[0]; + + if (command->header.code == MTP_OP_GET_DEVICE_PROP_DESC) { + // get describing dataset + mtp_device_prop_desc_header_t device_prop_header; + device_prop_header.device_property_code = dev_prop_code; + switch (dev_prop_code) { + case MTP_DEV_PROP_DEVICE_FRIENDLY_NAME: + device_prop_header.datatype = MTP_DATA_TYPE_STR; + device_prop_header.get_set = MTP_MODE_GET; + mtp_container_add_raw(io_container, &device_prop_header, sizeof(device_prop_header)); + mtp_container_add_cstring(io_container, DEV_PROP_FRIENDLY_NAME); // factory + mtp_container_add_cstring(io_container, DEV_PROP_FRIENDLY_NAME); // current + mtp_container_add_uint8(io_container, 0); // no form + tud_mtp_data_send(io_container); + break; + + default: + return MTP_RESP_PARAMETER_NOT_SUPPORTED; + } + } else { + // get value + switch (dev_prop_code) { + case MTP_DEV_PROP_DEVICE_FRIENDLY_NAME: + mtp_container_add_cstring(io_container, DEV_PROP_FRIENDLY_NAME); + tud_mtp_data_send(io_container); + break; + + default: + return MTP_RESP_PARAMETER_NOT_SUPPORTED; + } + } + return 0; +} + +static int32_t fs_get_object_handles(tud_mtp_cb_data_t* cb_data) { + const mtp_container_command_t* command = cb_data->command_container; + mtp_container_info_t* io_container = &cb_data->io_container; + + const uint32_t storage_id = command->params[0]; + const uint32_t obj_format = command->params[1]; // optional + const uint32_t parent_handle = command->params[2]; // folder handle, 0xFFFFFFFF is root + (void)obj_format; + + if (storage_id != 0xFFFFFFFF && storage_id != SUPPORTED_STORAGE_ID) { + return MTP_RESP_INVALID_STORAGE_ID; + } + + uint32_t handles[FS_MAX_FILE_COUNT] = { 0 }; + uint32_t count = 0; + for (uint8_t i = 0; i < FS_MAX_FILE_COUNT; i++) { + fs_file_t* f = &fs_objects[i]; + if (fs_file_exist(f) && + (parent_handle == f->parent || (parent_handle == 0xFFFFFFFF && f->parent == 0))) { + handles[count++] = i + 1; // handle is index + 1 + } + } + mtp_container_add_auint32(io_container, count, handles); + tud_mtp_data_send(io_container); + + return 0; +} + +static int32_t fs_get_object_info(tud_mtp_cb_data_t* cb_data) { + const mtp_container_command_t* command = cb_data->command_container; + mtp_container_info_t* io_container = &cb_data->io_container; + const uint32_t obj_handle = command->params[0]; + fs_file_t* f = fs_get_file(obj_handle); + if (f == NULL) { + return MTP_RESP_INVALID_OBJECT_HANDLE; + } + mtp_object_info_header_t obj_info_header = { + .storage_id = SUPPORTED_STORAGE_ID, + .object_format = f->object_format, + .protection_status = f->protection_status, + .object_compressed_size = f->size, + .thumb_format = MTP_OBJ_FORMAT_UNDEFINED, + .thumb_compressed_size = 0, + .thumb_pix_width = 0, + .thumb_pix_height = 0, + .image_pix_width = f->image_pix_width, + .image_pix_height = f->image_pix_height, + .image_bit_depth = f->image_bit_depth, + .parent_object = f->parent, + .association_type = f->association_type, + .association_desc = 0, + .sequence_number = 0 + }; + mtp_container_add_raw(io_container, &obj_info_header, sizeof(obj_info_header)); + mtp_container_add_string(io_container, f->name); + mtp_container_add_cstring(io_container, FS_FIXED_DATETIME); + mtp_container_add_cstring(io_container, FS_FIXED_DATETIME); + mtp_container_add_cstring(io_container, ""); // keywords, not used + tud_mtp_data_send(io_container); + + return 0; +} + +static int32_t fs_get_object(tud_mtp_cb_data_t* cb_data) { + const mtp_container_command_t* command = cb_data->command_container; + mtp_container_info_t* io_container = &cb_data->io_container; + const uint32_t obj_handle = command->params[0]; + const fs_file_t* f = fs_get_file(obj_handle); + if (f == NULL) { + return MTP_RESP_INVALID_OBJECT_HANDLE; + } + + if (cb_data->phase == MTP_PHASE_COMMAND) { + // If file contents is larger than CFG_TUD_MTP_EP_BUFSIZE, data may only partially is added here + // the rest will be sent in tud_mtp_data_more_cb + mtp_container_add_raw(io_container, f->data, f->size); + tud_mtp_data_send(io_container); + } else if (cb_data->phase == MTP_PHASE_DATA) { + // continue sending remaining data: file contents offset is xferred byte minus header size + const uint32_t offset = cb_data->total_xferred_bytes - sizeof(mtp_container_header_t); + const uint32_t xact_len = tu_min32(f->size - offset, io_container->payload_bytes); + if (xact_len > 0) { + memcpy(io_container->payload, f->data + offset, xact_len); + tud_mtp_data_send(io_container); + } + } + + return 0; +} + +static int32_t fs_send_object_info(tud_mtp_cb_data_t* cb_data) { + const mtp_container_command_t* command = cb_data->command_container; + mtp_container_info_t* io_container = &cb_data->io_container; + const uint32_t storage_id = command->params[0]; + const uint32_t parent_handle = command->params[1]; // folder handle, 0xFFFFFFFF is root + (void) parent_handle; + + if (!is_session_opened) { + return MTP_RESP_SESSION_NOT_OPEN; + } + if (storage_id != 0xFFFFFFFF && storage_id != SUPPORTED_STORAGE_ID) { + return MTP_RESP_INVALID_STORAGE_ID; + } + + if (cb_data->phase == MTP_PHASE_COMMAND) { + tud_mtp_data_receive(io_container); + } else if (cb_data->phase == MTP_PHASE_DATA) { + mtp_object_info_header_t* obj_info = (mtp_object_info_header_t*) io_container->payload; + if (obj_info->storage_id != 0 && obj_info->storage_id != SUPPORTED_STORAGE_ID) { + return MTP_RESP_INVALID_STORAGE_ID; + } + + if (obj_info->parent_object) { + fs_file_t* parent = fs_get_file(obj_info->parent_object); + if (parent == NULL || !parent->association_type) { + return MTP_RESP_INVALID_PARENT_OBJECT; + } + } + + uint8_t* f_buf = fs_malloc(obj_info->object_compressed_size); + if (f_buf == NULL) { + return MTP_RESP_STORE_FULL; + } + fs_file_t* f = fs_create_file(); + if (f == NULL) { + return MTP_RESP_STORE_FULL; + } + + f->object_format = obj_info->object_format; + f->protection_status = obj_info->protection_status; + f->image_pix_width = obj_info->image_pix_width; + f->image_pix_height = obj_info->image_pix_height; + f->image_bit_depth = obj_info->image_bit_depth; + f->parent = obj_info->parent_object; + f->association_type = obj_info->association_type; + f->size = obj_info->object_compressed_size; + f->data = f_buf; + uint8_t* buf = io_container->payload + sizeof(mtp_object_info_header_t); + mtp_container_get_string(buf, f->name); + // ignore date created/modified/keywords + } + + return 0; +} + +static int32_t fs_send_object(tud_mtp_cb_data_t* cb_data) { + mtp_container_info_t* io_container = &cb_data->io_container; + fs_file_t* f = fs_get_file(send_obj_handle); + if (f == NULL) { + return MTP_RESP_INVALID_OBJECT_HANDLE; + } + + if (cb_data->phase == MTP_PHASE_COMMAND) { + io_container->header->len += f->size; + tud_mtp_data_receive(io_container); + } else { + // file contents offset is total xferred minus header size minus last received chunk + const uint32_t offset = cb_data->total_xferred_bytes - sizeof(mtp_container_header_t) - io_container->payload_bytes; + memcpy(f->data + offset, io_container->payload, io_container->payload_bytes); + if (cb_data->total_xferred_bytes - sizeof(mtp_container_header_t) < f->size) { + tud_mtp_data_receive(io_container); + } + } + + return 0; +} + +static int32_t fs_delete_object(tud_mtp_cb_data_t* cb_data) { + const mtp_container_command_t* command = cb_data->command_container; + const uint32_t obj_handle = command->params[0]; + const uint32_t obj_format = command->params[1]; // optional + (void) obj_format; + + if (!is_session_opened) { + return MTP_RESP_SESSION_NOT_OPEN; + } + fs_file_t* f = fs_get_file(obj_handle); + if (f == NULL) { + return MTP_RESP_INVALID_OBJECT_HANDLE; + } + + // delete object by clear the name + f->name[0] = 0; + return MTP_RESP_OK; +} |