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add API function to perform volume adjustment on a frame of SLINEAR data

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documentation cleanup


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@6874 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kevin P. Fleming
2005-10-28 16:20:44 +00:00
parent d47e839c32
commit 0d34142f7e
2 changed files with 30 additions and 3 deletions
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19
frame.c
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@@ -1252,3 +1252,22 @@ int ast_codec_get_len(int format, int samples)
return len;
}
int ast_frame_adjust_volume(struct ast_frame *f, int adjustment)
{
int count;
short *fdata = f->data;
if ((f->frametype != AST_FRAME_VOICE) || (f->subclass != AST_FORMAT_SLINEAR))
return -1;
for (count = 0; count < f->samples; count++) {
if (adjustment > 0) {
fdata[count] *= abs(adjustment);
} else if (adjustment < 0) {
fdata[count] /= abs(adjustment);
}
}
return 0;
}