implement get object info

Author: hathach

examples/device/mtp/src/mtp_fs_example.c

@@ -65,7 +65,7 @@ typedef struct {
 static fs_object_info_t fs_objects[FS_MAX_NODES] = {
   {
     .handle = 1,
-    .parent = 0xffffffff,
+    .parent = 0,
     .allocated = true,
     .association = false,
     .name = "readme.txt",
@@ -80,7 +80,7 @@ static fs_object_info_t fs_objects[FS_MAX_NODES] = {
 #define STORAGE_DESCRIPTRION { 'd', 'i', 's', 'k', 0 }
 #define VOLUME_IDENTIFIER { 'v', 'o', 'l', 0 }
 
-typedef MTP_STORAGE_INFO_TYPEDEF(TU_ARRAY_SIZE((uint16_t[]) STORAGE_DESCRIPTRION),
+typedef MTP_STORAGE_INFO_STRUCT(TU_ARRAY_SIZE((uint16_t[]) STORAGE_DESCRIPTRION),
                                  TU_ARRAY_SIZE(((uint16_t[])VOLUME_IDENTIFIER))
 ) storage_info_t;
 
@@ -261,7 +261,8 @@ int32_t tud_mtp_command_received_cb(uint8_t idx, mtp_generic_container_t* cmd_bl
       uint32_t handles[FS_MAX_NODES] = { 0 };
       uint32_t count = 0;
       for (uint8_t i = 0, h = 0; i < FS_MAX_NODES; i++) {
-        if (fs_objects[i].allocated && parent_handle == fs_objects[i].parent) {
+        if (fs_objects[i].allocated && parent_handle == fs_objects[i].parent ||
+            (parent_handle == 0xFFFFFFFF && fs_objects[i].parent == 0)) {
           handles[count++] = fs_objects[i].handle;
         }
       }
@@ -270,6 +271,40 @@ int32_t tud_mtp_command_received_cb(uint8_t idx, mtp_generic_container_t* cmd_bl
       break;
     }
 
+    case MTP_OP_GET_OBJECT_INFO: {
+      const uint32_t object_handle = cmd_block->data[0];
+      fs_object_info_t* obj = fs_object_get_from_handle(object_handle);
+      if (obj == NULL) {
+        TU_LOG1("ERR: Object with handle %ld does not exist\r\n", object_handle);
+        return MTP_RESP_INVALID_OBJECT_HANDLE;
+      }
+      mtp_object_info_header_t object_info_header = {
+        .storage_id = SUPPORTED_STORAGE_ID,
+        .object_format = MTP_OBJ_FORMAT_TEXT,
+        .protection_status =  MTP_PROTECTION_STATUS_NO_PROTECTION,
+        .object_compressed_size = obj->size,
+        .thumb_format = MTP_OBJ_FORMAT_UNDEFINED,
+        .thumb_compressed_size = 0,
+        .thumb_pix_width = 0,
+        .thumb_pix_height = 0,
+        .image_pix_width = 0,
+        .image_pix_height = 0,
+        .image_bit_depth = 0,
+        .parent_object = obj->parent,
+        .association_type = MTP_ASSOCIATION_UNDEFINED,
+        .association_desc = 0,
+        .sequence_number = 0
+      };
+      mtp_container_add_raw(out_block, &object_info_header, sizeof(object_info_header));
+      mtp_container_add_cstring(out_block, obj->name);
+      mtp_container_add_cstring(out_block, obj->created);
+      mtp_container_add_cstring(out_block, obj->modified);
+      mtp_container_add_cstring(out_block, ""); // keywords, not used
+
+      tud_mtp_data_send(out_block);
+      break;
+    }
+
     default: return MTP_RESP_OPERATION_NOT_SUPPORTED;
   }
 
@@ -346,7 +381,7 @@ mtp_response_t tud_mtp_storage_association_get_object_handle(uint32_t storage_id
 }
 
 mtp_response_t tud_mtp_storage_object_write_info(uint32_t storage_id, uint32_t parent_object,
-                                                 uint32_t* new_object_handle, const mtp_object_info_t* info) {
+                                                 uint32_t* new_object_handle, const mtp_object_info_header_t* info) {
   fs_object_info_t* obj = NULL;
 
   if (_fs_operation.session_id == 0) {
@@ -402,7 +437,7 @@ mtp_response_t tud_mtp_storage_object_write_info(uint32_t storage_id, uint32_t p
   obj->association = info->object_format == MTP_OBJ_FORMAT_ASSOCIATION;
 
   // Extract variable data
-  uint16_t offset_data = sizeof(mtp_object_info_t);
+  uint16_t offset_data = sizeof(mtp_object_info_header_t);
   mtpd_gct_get_string(&offset_data, obj->name, FS_MAX_NODE_NAME_LEN);
   mtpd_gct_get_string(&offset_data, obj->created, FS_ISODATETIME_LEN);
   mtpd_gct_get_string(&offset_data, obj->modified, FS_ISODATETIME_LEN);
@@ -417,46 +452,6 @@ mtp_response_t tud_mtp_storage_object_write_info(uint32_t storage_id, uint32_t p
   return MTP_RESP_OK;
 }
 
-mtp_response_t tud_mtp_storage_object_read_info(uint32_t object_handle, mtp_object_info_t* info) {
-  const fs_object_info_t* obj;
-
-  if (_fs_operation.session_id == 0) {
-    TU_LOG1("ERR: Session not open\r\n");
-    return MTP_RESP_SESSION_NOT_OPEN;
-  }
-
-  obj = fs_object_get_from_handle(object_handle);
-  if (obj == NULL) {
-    TU_LOG1("ERR: Object with handle %ld does not exist\r\n", object_handle);
-    return MTP_RESP_INVALID_OBJECT_HANDLE;
-  }
-
-  memset(info, 0, sizeof(mtp_object_info_t));
-  info->storage_id = STORAGE_ID(0x0001, 0x0001);
-  if (obj->association) {
-    info->object_format = MTP_OBJ_FORMAT_ASSOCIATION;
-    info->protection_status = MTP_PROTECTION_STATUS_NO_PROTECTION;
-    info->object_compressed_size = 0;
-    info->association_type = MTP_ASSOCIATION_UNDEFINED;
-  } else {
-    info->object_format = MTP_OBJ_FORMAT_UNDEFINED;
-    info->protection_status = MTP_PROTECTION_STATUS_NO_PROTECTION;
-    info->object_compressed_size = obj->size;
-    info->association_type = MTP_ASSOCIATION_UNDEFINED;
-  }
-  info->thumb_format = MTP_OBJ_FORMAT_UNDEFINED;
-  info->parent_object = obj->parent;
-
-  mtpd_gct_append_wstring(obj->name);
-  mtpd_gct_append_wstring(obj->created); // date_created
-  mtpd_gct_append_wstring(obj->modified); // date_modified
-  mtpd_gct_append_wstring(""); // keywords, not used
-
-  TU_LOG1("Retrieve object %s with handle %ld\r\n", obj->name, obj->handle);
-
-  return MTP_RESP_OK;
-}
-
 mtp_response_t tud_mtp_storage_object_write(uint32_t object_handle, const uint8_t* buffer, uint32_t size) {
   fs_object_info_t* obj;
 

src/class/mtp/mtp.h

@@ -647,11 +647,12 @@ typedef enum {
 typedef enum {
   MTP_ASSOCIATION_UNDEFINED            = 0x0000u,
   MTP_ASSOCIATION_GENERIC_FOLDER       = 0x0001u,
-  MTP_ASSOCIATION_GENERIC_ALBUM        = 0x0002u,
+  MTP_ASSOCIATION_ALBUM                = 0x0002u,
   MTP_ASSOCIATION_TIME_SEQUENCE        = 0x0003u,
   MTP_ASSOCIATION_HORIZONTAL_PANORAMIC = 0x0004u,
   MTP_ASSOCIATION_VERTICAL_PANORAMIC   = 0x0005u,
   MTP_ASSOCIATION_2D_PANORAMIC         = 0x0006u,
+  MTP_ASSOCIATION_ANCILLARY_DATA       = 0x0007u,
 } mtp_association_t;
 
 //--------------------------------------------------------------------+
@@ -705,7 +706,7 @@ typedef union TU_ATTR_PACKED {
   uint32_t id;
 } mtp_storage_id_t;
 
-#define MTP_STORAGE_INFO_TYPEDEF(_storage_desc_chars, _volume_id_chars) \
+#define MTP_STORAGE_INFO_STRUCT(_storage_desc_chars, _volume_id_chars) \
   struct TU_ATTR_PACKED { \
     uint16_t storage_type; \
     uint16_t filesystem_type; \
@@ -717,29 +718,24 @@ typedef union TU_ATTR_PACKED {
     mtp_string_t(_volume_id_chars) volume_identifier; \
   }
 
-// ObjectInfo Dataset
+// Object Info Dataset without dynamic string: filename, date_created, date_modified, keywords
 typedef struct TU_ATTR_PACKED {
   uint32_t storage_id;
   uint16_t object_format;
   uint16_t protection_status;
   uint32_t object_compressed_size;
-  uint16_t thumb_format; // unused
-  uint32_t thumb_compressed_size; // unused
-  uint32_t thumb_pix_width; // unused
-  uint32_t thumb_pix_height; // unused
-  uint32_t image_pix_width; // unused
-  uint32_t image_pix_height; // unused
-  uint32_t image_bit_depth; // unused
+  uint16_t thumb_format;
+  uint32_t thumb_compressed_size;
+  uint32_t thumb_pix_width;
+  uint32_t thumb_pix_height;
+  uint32_t image_pix_width;
+  uint32_t image_pix_height;
+  uint32_t image_bit_depth;
   uint32_t parent_object; // 0: root
   uint16_t association_type;
-  uint32_t association_description; // not used
-  uint32_t sequence_number; // not used
-} mtp_object_info_t;
-// The following fields will be dynamically added to the struct at runtime:
-// - wstring filename;
-// - datetime_wstring date_created;
-// - datetime_wstring date_modified;
-// - wstring keywords;
+  uint32_t association_desc;
+  uint32_t sequence_number;
+} mtp_object_info_header_t;
 
 // Device property desc up to get/set
 typedef struct TU_ATTR_PACKED {
@@ -754,7 +750,7 @@ typedef struct TU_ATTR_PACKED {
 // - uint8_t form_flag;
 
 // no form
-#define MTP_DEVICE_PROPERTIES_TYPEDEF(_type) \
+#define MTP_DEVICE_PROPERTIES_STRUCT(_type) \
    struct TU_ATTR_PACKED { \
      uint16_t device_property_code; \
      uint16_t datatype; \
@@ -764,7 +760,6 @@ typedef struct TU_ATTR_PACKED {
      uint8_t form_flag; /* 0: none, 1: range, 2: enum */ \
    };
 
-
 typedef struct TU_ATTR_PACKED {
   uint16_t wLength;
   uint16_t code;

src/class/mtp/mtp_device.c

@@ -85,7 +85,6 @@ static mtp_phase_type_t mtpd_chk_session_open(const char *func_name);
 static mtp_phase_type_t mtpd_handle_cmd(mtpd_interface_t* p_mtp);
 static mtp_phase_type_t mtpd_handle_data(void);
 static mtp_phase_type_t mtpd_handle_cmd_close_session(void);
-static mtp_phase_type_t mtpd_handle_cmd_get_object_info(void);
 static mtp_phase_type_t mtpd_handle_cmd_get_object(void);
 static mtp_phase_type_t mtpd_handle_dti_get_object(void);
 static mtp_phase_type_t mtpd_handle_cmd_delete_object(void);
@@ -454,7 +453,8 @@ mtp_phase_type_t mtpd_handle_cmd(mtpd_interface_t* p_mtp) {
 
     case MTP_OP_GET_OBJECT_INFO:
       TU_LOG_DRV("  MTP command: MTP_OP_GET_OBJECT_INFO\n");
-      return mtpd_handle_cmd_get_object_info();
+      break;
+
     case MTP_OP_GET_OBJECT:
       TU_LOG_DRV("  MTP command: MTP_OP_GET_OBJECT\n");
       return mtpd_handle_cmd_get_object();
@@ -528,25 +528,6 @@ mtp_phase_type_t mtpd_handle_cmd_close_session(void)
   return MTP_PHASE_RESPONSE;
 }
 
-mtp_phase_type_t mtpd_handle_cmd_get_object_info(void)
-{
-  TU_VERIFY_STATIC(sizeof(mtp_object_info_t) < MTP_MAX_PACKET_SIZE, "mtp_object_info_t shall fit in MTP_MAX_PACKET_SIZE");
-  mtp_generic_container_t* p_container = &_mtpd_epbuf.container;
-  uint32_t object_handle = p_container->data[0];
-
-  p_container->len = MTP_CONTAINER_HEADER_LENGTH + sizeof(mtp_object_info_t);
-  p_container->type = MTP_CONTAINER_TYPE_DATA_BLOCK;
-  p_container->code = MTP_OP_GET_OBJECT_INFO;
-  mtp_response_t res = tud_mtp_storage_object_read_info(object_handle, (mtp_object_info_t *)p_container->data);
-  mtp_phase_type_t phase;
-  if ((phase = mtpd_chk_generic(__func__, (res != MTP_RESP_OK), res, "")) != MTP_PHASE_NONE) {
-    return phase;
-  }
-
-  _mtpd_itf.queued_len = p_container->len;
-  return MTP_PHASE_DATA_IN;
-}
-
 mtp_phase_type_t mtpd_handle_cmd_get_object(void)
 {
   mtp_generic_container_t* p_container = &_mtpd_epbuf.container;
@@ -634,7 +615,7 @@ mtp_phase_type_t mtpd_handle_dto_send_object_info(void)
 {
   mtp_generic_container_t* p_container = &_mtpd_epbuf.container;
   uint32_t new_object_handle = 0;
-  mtp_response_t res = tud_mtp_storage_object_write_info(_mtpd_soi.storage_id, _mtpd_soi.parent_object_handle, &new_object_handle, (mtp_object_info_t *)p_container->data);
+  mtp_response_t res = tud_mtp_storage_object_write_info(_mtpd_soi.storage_id, _mtpd_soi.parent_object_handle, &new_object_handle, (mtp_object_info_header_t *)p_container->data);
   mtp_phase_type_t phase;
   if ((phase = mtpd_chk_generic(__func__, (res != MTP_RESP_OK), res, "")) != MTP_PHASE_NONE) return phase;
 

src/class/mtp/mtp_device_storage.h

@@ -77,7 +77,7 @@ mtp_response_t tud_mtp_storage_association_get_object_handle(uint32_t session_ha
 // The handle of the new object shall be returned in new_object_handle.
 // The structure info contains the information to be used for file creation, as passted by the host.
 // Note that the variable information (e.g. wstring file name, dates and tags shall be retrieved by using the library functions)
-mtp_response_t tud_mtp_storage_object_write_info(uint32_t storage_id, uint32_t parent_object, uint32_t *new_object_handle, const mtp_object_info_t *info);
+mtp_response_t tud_mtp_storage_object_write_info(uint32_t storage_id, uint32_t parent_object, uint32_t *new_object_handle, const mtp_object_info_header_t *info);
 
 // Get object information related to a given object handle
 //
@@ -89,7 +89,7 @@ mtp_response_t tud_mtp_storage_object_write_info(uint32_t storage_id, uint32_t p
 // - Date modified (string, use tud_gct_append_date or empty string)
 // - Keywords (string containing list of kw, separated by space, use tud_mtp_gct_append_wstring)
 // Note that the variable information (e.g. wstring file name, dates and tags shall be written by using the library functions)
-mtp_response_t tud_mtp_storage_object_read_info(uint32_t object_handle, mtp_object_info_t *info);
+mtp_response_t tud_mtp_storage_object_read_info(uint32_t object_handle, mtp_object_info_header_t *info);
 
 // Get the object size.
 //