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authorStefan Pöschel <github@basicmaster.de>2017-08-07 23:48:00 +0200
committerStefan Pöschel <github@basicmaster.de>2017-08-07 23:48:00 +0200
commitb25021100436ada451cdd22e5a4d9a644d2bc3d7 (patch)
tree7629024d439ac8506cccb24a9d46135f081dc864 /src
parente110738ab180ce1eb38b0bf533ace51b58b95dc0 (diff)
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AAC: skip PAD if only zero F-PAD
This optimizations saves four bytes if no X-PAD is present.
Diffstat (limited to 'src')
-rw-r--r--src/odr-audioenc.cpp15
1 files changed, 14 insertions, 1 deletions
diff --git a/src/odr-audioenc.cpp b/src/odr-audioenc.cpp
index 94e47cc..ff743bb 100644
--- a/src/odr-audioenc.cpp
+++ b/src/odr-audioenc.cpp
@@ -982,7 +982,18 @@ int main(int argc, char *argv[])
throw runtime_error(ss.str());
}
- status |= STATUS_PAD_INSERTED;
+ /*
+ * AAC: skip PAD if only zero F-PAD (saves four bytes)
+ * See §5.4.3 in ETSI TS 102 563
+ */
+ if (
+ selected_encoder == encoder_selection_t::fdk_dabplus &&
+ calculated_padlen == 2 &&
+ pad_buf[padlen - 2] == 0x00 &&
+ pad_buf[padlen - 1] == 0x00
+ ) {
+ calculated_padlen = 0;
+ }
}
else {
// Some other error occurred during read.
@@ -990,6 +1001,8 @@ int main(int argc, char *argv[])
break;
}
}
+ if (calculated_padlen)
+ status |= STATUS_PAD_INSERTED;
// -------------- Read Data