drivers/staging/media/atomisp/pci/atomisp2/css2400/ia_css_metadata.h

   1 /*
   2  * Support for Intel Camera Imaging ISP subsystem.
   3  * Copyright (c) 2015, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  */
  14
  15 #ifndef __IA_CSS_METADATA_H
  16 #define __IA_CSS_METADATA_H
  17
  18 /* @file
  19  * This file contains structure for processing sensor metadata.
  20  */
  21
  22 #include <type_support.h>
  23 #include "ia_css_types.h"
  24 #include "ia_css_stream_format.h"
  25
  26 /* Metadata configuration. This data structure contains necessary info
  27  *  to process sensor metadata.
  28  */
  29 struct ia_css_metadata_config {
  30         enum ia_css_stream_format data_type; /** Data type of CSI-2 embedded
  31                         data. The default value is IA_CSS_STREAM_FORMAT_EMBEDDED. For
  32                         certain sensors, user can choose non-default data type for embedded
  33                         data. */
  34         struct ia_css_resolution  resolution; /** Resolution */
  35 };
  36
  37 struct ia_css_metadata_info {
  38         struct ia_css_resolution resolution; /** Resolution */
  39         uint32_t                 stride;     /** Stride in bytes */
  40         uint32_t                 size;       /** Total size in bytes */
  41 };
  42
  43 struct ia_css_metadata {
  44         struct ia_css_metadata_info info;    /** Layout info */
  45         ia_css_ptr                  address; /** CSS virtual address */
  46         uint32_t                    exp_id;
  47         /** Exposure ID, see ia_css_event_public.h for more detail */
  48 };
  49 #define SIZE_OF_IA_CSS_METADATA_STRUCT sizeof(struct ia_css_metadata)
  50
  51 /* @brief Allocate a metadata buffer.
  52  * @param[in]   metadata_info Metadata info struct, contains details on metadata buffers.
  53  * @return      Pointer of metadata buffer or NULL (if error)
  54  *
  55  * This function allocates a metadata buffer according to the properties
  56  * specified in the metadata_info struct.
  57  */
  58 struct ia_css_metadata *
  59 ia_css_metadata_allocate(const struct ia_css_metadata_info *metadata_info);
  60
  61 /* @brief Free a metadata buffer.
  62  *
  63  * @param[in]   metadata        Pointer of metadata buffer.
  64  * @return      None
  65  *
  66  * This function frees a metadata buffer.
  67  */
  68 void
  69 ia_css_metadata_free(struct ia_css_metadata *metadata);
  70
  71 #endif /* __IA_CSS_METADATA_H */