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      1 /* Copyright (c) 2016, The Linux Foundation. All rights reserved.
      2  *
      3  * Redistribution and use in source and binary forms, with or without
      4  * modification, are permitted provided that the following conditions are
      5  * met:
      6  *     * Redistributions of source code must retain the above copyright
      7  *       notice, this list of conditions and the following disclaimer.
      8  *     * Redistributions in binary form must reproduce the above
      9  *       copyright notice, this list of conditions and the following
     10  *       disclaimer in the documentation and/or other materials provided
     11  *       with the distribution.
     12  *     * Neither the name of The Linux Foundation nor the names of its
     13  *       contributors may be used to endorse or promote products derived
     14  *       from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
     23  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     24  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
     25  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
     26  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  *
     28  */
     29 
     30 #ifndef __MM_CAMERA_SHIMLAYER_H_
     31 #define __MM_CAMERA_SHIMLAYER_H_
     32 
     33 #include "cam_intf.h"
     34 
     35 /*
     36  * MCT shim layer APIs
     37  */
     38 #define SHIMLAYER_LIB "/system/vendor/lib/libmmcamera2_mct_shimlayer.so"
     39 
     40 struct cam_shim_packet;
     41 
     42 /*
     43 * Bundled events structure.
     44 */
     45 typedef struct {
     46     uint8_t cmd_count;            /* Total number of events in this packet */
     47     struct cam_shim_packet *cmd;  /*Events to process*/
     48 } cam_shim_cmd_packet_t;
     49 
     50 /*
     51 * Bundled stream event structure
     52 */
     53 typedef struct {
     54     uint8_t stream_count;                                /*Number of streams in a bundle*/
     55     cam_shim_cmd_packet_t stream_event[MAX_NUM_STREAMS]; /*Event for different streams*/
     56 } cam_shim_stream_cmd_packet_t;
     57 
     58 /*
     59 * Command types to process in shim layer
     60 */
     61 typedef enum {
     62     CAM_SHIM_SET_PARM,   /*v4l2 set parameter*/
     63     CAM_SHIM_GET_PARM,   /*v4l2 get parameter*/
     64     CAM_SHIM_REG_BUF,    /*Reg/unreg buffers with back-end*/
     65     CAM_SHIM_BUNDLE_CMD, /*Bundled command for streams*/
     66 } cam_shim_cmd_type;
     67 
     68 typedef struct {
     69     uint32_t command;    /*V4L2 or private command*/
     70     uint32_t stream_id;  /*streamID*/
     71     void *value;          /*command value/data*/
     72 } cam_shim_cmd_data;
     73 
     74 /*
     75 * Structure to communicate command with shim layer
     76 */
     77 typedef struct cam_shim_packet {
     78     uint32_t session_id;
     79     cam_shim_cmd_type cmd_type;                 /*Command type to process*/
     80     union {
     81         cam_shim_cmd_data cmd_data;             /*get/set parameter structure*/
     82         cam_reg_buf_t reg_buf;                  /*Buffer register and unregister*/
     83         cam_shim_stream_cmd_packet_t bundle_cmd;/*Bundled command*/
     84     };
     85 } cam_shim_packet_t;
     86 
     87 typedef int32_t (*mm_camera_shim_event_handler_func)(uint32_t session_id,
     88         cam_event_t *event);
     89 
     90 typedef struct {
     91     cam_status_t (*mm_camera_shim_open_session) (int session,
     92             mm_camera_shim_event_handler_func evt_cb);
     93     int32_t (*mm_camera_shim_close_session)(int session);
     94     int32_t (*mm_camera_shim_send_cmd)(cam_shim_packet_t *event);
     95 } mm_camera_shim_ops_t;
     96 
     97 int32_t (*mm_camera_shim_module_init)(mm_camera_shim_ops_t *shim_ops);
     98 
     99 #endif  /*__MM_CAMERA_SHIMLAYER_H_*/
    100