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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 #include <stdio.h>
     31 #include <string.h>
     32 #include <stdlib.h>
     33 
     34 #include "metadata-defs.h"
     35 
     36 int parse_metadata(char *metadata, char **metadata_saveptr,
     37         char *attribute, int attribute_size, char *value, int value_size)
     38 {
     39     char *attribute_string;
     40     char *attribute_value_delim;
     41     unsigned int bytes_to_copy;
     42 
     43     attribute_string = strtok_r(metadata, ATTRIBUTE_STRING_DELIM,
     44             metadata_saveptr);
     45 
     46     if (attribute_string == NULL)
     47         return METADATA_PARSING_DONE;
     48 
     49     attribute[0] = value[0] = '\0';
     50 
     51     if ((attribute_value_delim = strchr(attribute_string,
     52                     ATTRIBUTE_VALUE_DELIM)) != NULL) {
     53         bytes_to_copy = MIN((attribute_value_delim - attribute_string),
     54                 attribute_size - 1);
     55         strncpy(attribute, attribute_string,
     56                 bytes_to_copy);
     57         attribute[bytes_to_copy] = '\0';
     58 
     59         bytes_to_copy = MIN(strlen(attribute_string) - strlen(attribute) - 1,
     60                 value_size - 1);
     61         strncpy(value, attribute_value_delim + 1,
     62                 bytes_to_copy);
     63         value[bytes_to_copy] = '\0';
     64     }
     65 
     66     return METADATA_PARSING_CONTINUE;
     67 }
     68 
     69 int parse_video_encode_metadata(char *metadata,
     70     struct video_encode_metadata_t *video_encode_metadata)
     71 {
     72     char attribute[1024], value[1024], *saveptr;
     73     char *temp_metadata = metadata;
     74     int parsing_status;
     75 
     76     while ((parsing_status = parse_metadata(temp_metadata, &saveptr,
     77             attribute, sizeof(attribute), value, sizeof(value))) == METADATA_PARSING_CONTINUE) {
     78         if (strlen(attribute) == strlen("hint_id") &&
     79             (strncmp(attribute, "hint_id", strlen("hint_id")) == 0)) {
     80             if (strlen(value) > 0) {
     81                 video_encode_metadata->hint_id = atoi(value);
     82             }
     83         }
     84 
     85         if (strlen(attribute) == strlen("state") &&
     86             (strncmp(attribute, "state", strlen("state")) == 0)) {
     87             if (strlen(value) > 0) {
     88                 video_encode_metadata->state = atoi(value);
     89             }
     90         }
     91 
     92         temp_metadata = NULL;
     93     }
     94 
     95     if (parsing_status == METADATA_PARSING_ERR)
     96         return -1;
     97 
     98     return 0;
     99 }
    100 
    101 int parse_video_decode_metadata(char *metadata,
    102     struct video_decode_metadata_t *video_decode_metadata)
    103 {
    104     char attribute[1024], value[1024], *saveptr;
    105     char *temp_metadata = metadata;
    106     int parsing_status;
    107 
    108     while ((parsing_status = parse_metadata(temp_metadata, &saveptr,
    109             attribute, sizeof(attribute), value, sizeof(value))) == METADATA_PARSING_CONTINUE) {
    110         if (strlen(attribute) == strlen("hint_id") &&
    111             (strncmp(attribute, "hint_id", strlen("hint_id")) == 0)) {
    112             if (strlen(value) > 0) {
    113                 video_decode_metadata->hint_id = atoi(value);
    114             }
    115         }
    116 
    117         if (strlen(attribute) == strlen("state") &&
    118             (strncmp(attribute, "state", strlen("state")) == 0)) {
    119             if (strlen(value) > 0) {
    120                 video_decode_metadata->state = atoi(value);
    121             }
    122         }
    123 
    124         temp_metadata = NULL;
    125     }
    126 
    127     if (parsing_status == METADATA_PARSING_ERR)
    128         return -1;
    129 
    130     return 0;
    131 }
    132