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amrparse: fix and streamline valid frame checking

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... to handle various combinations of sync or not, and sufficient data
or not as might be expected.

Fixes #650714.
This commit is contained in:
Mark Nauwelaerts 2011-09-05 15:50:04 +02:00
parent 4b8ead4340
commit b9a54a38b0
1 changed files with 22 additions and 5 deletions
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23
gst/audioparsers/gstamrparse.c
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@ -307,13 +307,30 @@ gst_amr_parse_check_valid_frame (GstBaseParse * parse,
* to contain a valid header as well (and there is enough data to
* perform this check)
*/
if (fsize &&
(!GST_BASE_PARSE_LOST_SYNC (parse) || GST_BASE_PARSE_DRAINING (parse)
|| (dsize > fsize && (data[fsize] & 0x83) == 0))) {
if (fsize) {
gboolean found = FALSE;
/* in sync, no further check */
if (!GST_BASE_PARSE_LOST_SYNC (parse)) {
found = TRUE;
} else if (dsize > fsize) {
/* enough data, check for next sync */
if ((data[fsize] & 0x83) == 0)
found = TRUE;
} else if (GST_BASE_PARSE_DRAINING (parse)) {
/* not enough, but draining, so ok */
found = TRUE;
} else {
/* indicate we need not skip, but need more data */
*skipsize = 0;
*framesize = fsize + 1;
}
if (found) {
*framesize = fsize;
return TRUE;
}
}
}
GST_LOG ("sync lost");
return FALSE;