avcodec/utils : add ff_int_from_list_or_default func

to check valid value, or return default_value
This commit is contained in:
Martin Vignali 2018-12-02 21:36:24 +01:00
parent aae7e009b3
commit e53901ba5e
2 changed files with 31 additions and 0 deletions

View File

@ -404,6 +404,18 @@ int ff_alloc_a53_sei(const AVFrame *frame, size_t prefix_len,
*/
int64_t ff_guess_coded_bitrate(AVCodecContext *avctx);
/**
* Check if a value is in the list. If not, return the default value
*
* @param ctx Context for the log msg
* @param val_name Name of the checked value, for log msg
* @param array_valid_values Array of valid int, ended with INT_MAX
* @param default_value Value return if checked value is not in the array
* @return Value or default_value.
*/
int ff_int_from_list_or_default(void *ctx, const char * val_name, int val,
const int * array_valid_values, int default_value);
#if defined(_WIN32) && CONFIG_SHARED && !defined(BUILDING_avcodec)
# define av_export_avcodec __declspec(dllimport)
#else

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@ -2209,3 +2209,22 @@ int64_t ff_guess_coded_bitrate(AVCodecContext *avctx)
return bitrate;
}
int ff_int_from_list_or_default(void *ctx, const char * val_name, int val,
const int * array_valid_values, int default_value)
{
int i = 0, ref_val;
while (1) {
ref_val = array_valid_values[i];
if (ref_val == INT_MAX)
break;
if (val == ref_val)
return val;
i++;
}
/* val is not a valid value */
av_log(ctx, AV_LOG_DEBUG,
"%s %d are not supported. Set to default value : %d\n", val_name, val, default_value);
return default_value;
}