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      1 /* Copyright (c) 2012, 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 #define ATTRIBUTE_VALUE_DELIM ('=')
     31 #define ATTRIBUTE_STRING_DELIM (";")
     32 
     33 #define METADATA_PARSING_ERR (-1)
     34 #define METADATA_PARSING_CONTINUE (0)
     35 #define METADATA_PARSING_DONE (1)
     36 
     37 #define MIN(x,y) (((x)>(y))?(y):(x))
     38 
     39 struct video_encode_metadata_t {
     40     int hint_id;
     41     int state;
     42 };
     43 
     44 struct video_decode_metadata_t {
     45     int hint_id;
     46     int state;
     47 };
     48 
     49 struct cam_preview_metadata_t {
     50     int hint_id;
     51     int state;
     52 };
     53 
     54 int parse_metadata(char *metadata, char **metadata_saveptr,
     55     char *attribute, unsigned int attribute_size,
     56     char *value, unsigned int value_size);
     57 int parse_video_encode_metadata(char *metadata,
     58     struct video_encode_metadata_t *video_encode_metadata);
     59 int parse_video_decode_metadata(char *metadata,
     60     struct video_decode_metadata_t *video_decode_metadata);
     61 int parse_cam_preview_metadata(char *metadata,
     62     struct cam_preview_metadata_t *video_decode_metadata);
     63